WO2023151508A1 - Communication method and apparatus, terminal device, and network device - Google Patents
Communication method and apparatus, terminal device, and network device Download PDFInfo
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- WO2023151508A1 WO2023151508A1 PCT/CN2023/074259 CN2023074259W WO2023151508A1 WO 2023151508 A1 WO2023151508 A1 WO 2023151508A1 CN 2023074259 W CN2023074259 W CN 2023074259W WO 2023151508 A1 WO2023151508 A1 WO 2023151508A1
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Classifications
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- H—ELECTRICITY
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- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
-
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- H—ELECTRICITY
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- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
- H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
Definitions
- the present application relates to the technical field of communication, and in particular to a communication method and device, terminal equipment and network equipment.
- the non-terrestrial network (NTN) communication system Compared with the terrestrial network communication system, the non-terrestrial network (NTN) communication system has a larger propagation delay, so the communication method in the terrestrial communication system is no longer applicable to the NTN communication system.
- NTN non-terrestrial network
- the third generation partnership project (3rd generation partnership project, 3GPP) standard usually assumes that the antenna gain of the terminal equipment is 0dBi, but in the actual communication process, the antenna gain of the terminal equipment often cannot meet the above requirements . Since the antenna gain of the terminal device cannot meet the requirement, when the terminal device performs random access, the network device may not successfully receive the random access request message (such as message 1 or Msg1 ) sent by the terminal device.
- the present application provides a communication method and device, terminal equipment, and network equipment, in order to achieve coverage enhancement, improve transmission reliability of random access request messages, and increase the possibility of successful random access of terminal equipment.
- the first aspect is a communication method of the present application, which is applied to a terminal device; the method includes:
- the indication information is used to indicate K i , where K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1 ⁇ i ⁇ M, and the M is the total number of SSBs in the first cell, and the K i is a positive integer greater than or equal to 1;
- a random access request message is sent, and the SSB indicated by the SSB index i is the SSB selected by the terminal device from the monitored SSBs.
- the instruction information is introduced so that the network device can indicate to the terminal device the number of repetitions of the random access request message configured for the SSB index or SSB through the instruction information, and then the terminal device can perform random access according to the selected SSB.
- the random access request message is sent multiple times to the network device according to the number of repetitions of the incoming request message, which helps to achieve coverage enhancement, improve the transmission reliability of the random access request message, and increase the possibility of successful random access of the terminal device.
- the first cell is a serving cell of the terminal device.
- the first cell is a cell where the terminal equipment resides.
- the first cell is the cell where the terminal device resides. It should be noted that, in the embodiment of the present application, the terminal device initially accesses the network, and the cell where the terminal resides may also be understood as the serving cell of the terminal device.
- the second aspect is a communication method of the present application, which is applied to a network device; the method includes:
- the indication information is used to indicate K i , where K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1 ⁇ i ⁇ M, and the M is the total number of SSBs in the first cell, and the K i is a positive integer greater than or equal to 1.
- the third aspect is a communication device of the present application, which includes:
- a receiving unit configured to receive indication information, where the indication information is used to indicate K i , where K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1 ⁇ i ⁇ M, where M is the total number of SSBs in the first cell, and K i is a positive integer greater than or equal to 1;
- a sending unit configured to send a random access request message according to the K i , where the SSB indicated by the SSB index i is the SSB selected by the terminal device from the monitored SSBs.
- the fourth aspect is a communication device of the present application, which includes:
- a sending unit configured to send indication information, where the indication information is used to indicate K i , where K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1 ⁇ i ⁇ M, where M is the total number of SSBs in the first cell, and K i is a positive integer greater than or equal to 1.
- the fifth aspect is a terminal device of the present application, including a processor, a memory, and computer programs or instructions stored in the memory, wherein, the processor executes the computer program or instructions to realize the above first aspect steps in the designed method.
- the sixth aspect is a network device of the present application, including a processor, a memory, and a computer program or instruction stored on the memory, wherein the processor executes the computer program or instruction to realize the above-mentioned second aspect steps in the designed method.
- a seventh aspect is a chip of the present application, including a processor, wherein the processor executes the steps in the method designed in the above-mentioned first aspect or the second aspect.
- the eighth aspect is a chip module of the present application, including a transceiver component and a chip, and the chip includes a processor, wherein the processor The processor executes the steps in the method designed in the first aspect or the second aspect above.
- the ninth aspect is a computer-readable storage medium of the present application, wherein the computer-readable storage medium stores computer programs or instructions, and when the computer programs or instructions are executed, the above-mentioned first or second aspect is realized steps in the designed method.
- the tenth aspect is a computer program product of the present application, including computer programs or instructions, wherein when the computer programs or instructions are executed, the steps in the method designed in the first aspect or the second aspect above are realized.
- the computer program product may be a software installation package.
- FIG. 1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present application.
- FIG. 2 is a schematic diagram of the architecture of a transparent satellite communication system according to an embodiment of the present application
- FIG. 3 is a schematic structural diagram of a beam generated by a satellite on the ground according to an embodiment of the present application
- FIG. 4 is a schematic structural diagram of comparing signal reception quality between a land network communication system and an NTN communication system according to an embodiment of the present application
- Fig. 5 is the architectural diagram of the architecture comparison of a kind of NTN communication system of the embodiment of the present application.
- FIG. 6 is a schematic flow diagram of a 4-step random access according to an embodiment of the present application.
- FIG. 7 is a schematic flow diagram of a two-step random access according to an embodiment of the present application.
- FIGS. 8 to 10 are schematic diagrams of a mapping relationship between an SSB and an RO according to an embodiment of the present application.
- FIG. 11 is a schematic diagram of a scenario of configuring the number of repetitions of Msg1 to the SSB index according to an embodiment of the present application
- FIG. 12 to FIG. 31 are schematic diagrams of another mapping relationship between SSB and RO according to the embodiment of the present application.
- Fig. 32 is a schematic diagram of another scenario of configuring the number of repetitions of Msg1 to the SSB index according to the embodiment of the present application;
- FIG. 33 to FIG. 36 are schematic diagrams of another mapping relationship between SSB and RO according to the embodiment of the present application.
- FIG. 37 is a schematic diagram of another scenario of configuring the number of repetitions of Msg1 to the SSB index according to the embodiment of the present application.
- FIG. 38 to FIG. 47 are schematic diagrams of another mapping relationship between SSB and RO according to the embodiment of the present application.
- FIG. 48 is a schematic flowchart of a communication method according to an embodiment of the present application.
- FIG. 49 is a block diagram of functional units of a communication device according to an embodiment of the present application.
- FIG. 50 is a block diagram of functional units of another communication device according to an embodiment of the present application.
- FIG. 51 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
- Fig. 52 is a schematic structural diagram of a network device according to an embodiment of the present application.
- At least one in the embodiments of the present application refers to one or more, and multiple refers to two or more.
- At least one of the following or similar expressions in the embodiments of the present application refer to any combination of these items, including any combination of a single item or a plurality of items.
- at least one item (piece) of a, b or c can represent the following seven situations: a, b, c, a and b, a and c, b and c, a, b and c.
- each of a, b, and c may be an element, or a set containing one or more elements.
- Network in the embodiments of the present application may be expressed as the same concept as “system”, and a communication system is a communication network.
- connection in the embodiments of the present application refers to various connection modes such as direct connection or indirect connection, so as to realize communication between devices, which is not specifically limited.
- the technical solution of the embodiment of the present application can be applied to various wireless communication systems, such as: Long Term Evolution (Long Term Evolution, LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (New Radio , NR) system, evolution system of NR system, LTE (LTE-based Access to Unlicensed Spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based Access to Unlicensed Spectrum, NR-U) system on unlicensed spectrum ) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunications System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi) , 6th generation (6th-Generation, 6G) communication system or other communication systems, etc.
- LTE Long Term Evolution
- LTE-A Advanced Long Term Evolution
- NR New Radio
- evolution system of NR system LTE (LTE-based Access to Unlicensed Spectrum, LTE-U) system on unlicensed spectrum
- NR
- the wireless communication system can not only support the traditional wireless communication system, but also support such as device to device (device to device, D2D) communication, machine to machine (machine to machine, M2M) communication, machine type communication (machine type communication, MTC), inter-vehicle (vehicle to vehicle, V2V) communication, vehicle networking (vehicle to everything, V2X) communication, narrow band Internet of things (narrow band internet of things, NB-IoT) communication, etc.
- D2D device to device
- M2M machine to machine
- MTC machine type communication
- V2V vehicle type communication
- V2X vehicle networking
- narrow band Internet of things narrow band internet of things
- NB-IoT narrow band internet of things
- the embodiments of the present application may be applied to beamforming (beamforming), carrier aggregation (carrier aggregation, CA), dual connectivity (dual connectivity, DC) or independent (standalone, SA) deployment scenarios, and the like.
- the embodiments of the present application may be applied to a communication scenario of an unlicensed spectrum.
- the unlicensed spectrum may also be regarded as the shared spectrum.
- the embodiments of the present application may also be applied to licensed spectrum.
- the licensed spectrum can also be regarded as a non-shared spectrum.
- the technical solutions of the embodiments of the present application may be applied to an NTN communication system, for example, a satellite communication system.
- NTN communication system for example, a satellite communication system.
- satellite communication systems usually network equipment communicates with ground terminal equipment through satellites.
- the NTN communication system 10 may include a terminal device 110 , a reference point (reference point) 120 , a satellite 130 , a non-terrestrial network gateway (NTN gateway) 140 and a network device 150 .
- the terminal device 110 , the non-terrestrial network gateway 140 and the network device 150 may be located on the earth's surface, while the satellite 130 is located in the earth's orbit.
- the satellite 130 can provide communication services to the geographical area covered by the signal, and can communicate with the terminal device 110 located in the signal coverage area.
- the terminal device 110 is located in a certain cell or beam, and the cell includes a reference point 120 .
- the wireless communication link between the terminal device 110 and the satellite 130 is called a service link.
- the wireless communication link between the satellite 130 and the non-terrestrial network gateway 140 is called a feeder link.
- non-terrestrial network gateway 140 and the network device 150 may be integrated into the same device, or may be independent devices, which is not specifically limited.
- the terminal equipment may be a device with transceiver function, and may also be called user equipment (user equipment, UE), remote terminal equipment (remote UE), relay equipment (relay UE), access Terminal equipment, subscriber unit, subscriber station, mobile station, mobile station, remote station, mobile equipment, subscriber terminal equipment, intelligent terminal equipment, wireless communication equipment, user agent or user device.
- a relay device is a terminal device capable of providing relay and forwarding services for other terminal devices (including remote terminal devices).
- the terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), with Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in next-generation communication systems (such as NR communication systems, 6G communication systems), or public land for future evolution Terminal equipment in a mobile communication network (public land mobile network, PLMN), etc., is not specifically limited.
- SIP session initiation protocol
- WLL wireless local loop
- PDA personal digital assistant
- terminal devices can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can be deployed on water (such as ships, etc.); can be deployed in the air (such as aircraft, balloons and satellites, etc.).
- the terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device , wireless terminal equipment in industrial control, wireless terminal equipment in unmanned automatic driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation safety ( Wireless terminal equipment in transportation safety, wireless terminal equipment in smart city (smart city) or wireless terminal equipment in smart home (smart home), etc.
- a virtual reality (virtual reality, VR) terminal device an augmented reality (augmented reality, AR) terminal device
- wireless terminal equipment in industrial control wireless terminal equipment in unmanned automatic driving
- wireless terminal equipment in remote medical wireless terminal equipment in smart grid
- transportation safety Wireless terminal equipment in transportation safety, wireless terminal equipment in smart city (smart city) or wireless terminal equipment in smart home (smart home), etc.
- the terminal device may include an apparatus with a wireless communication function, such as a chip system, a chip, or a chip module.
- a wireless communication function such as a chip system, a chip, or a chip module.
- the chip system may include a chip, and may also include other discrete devices.
- the satellite may be a spacecraft carrying a transparent payload (or called a bent pipe payload) or a regenerative payload signal transmitter, that is, a transparent payload.
- a transparent payload or called a bent pipe payload
- a regenerative payload signal transmitter that is, a transparent payload.
- Satellite Transparent satellite
- regenerative satellite Regenerative satellite
- satellites can be divided into low earth orbit (LEO) satellites, medium earth orbit (MEO) satellites, geostationary earth orbit (GEO) satellites and high Elliptical orbit (high elliptical orbit, HEO) satellites, etc.
- LEO low earth orbit
- MEO medium earth orbit
- GEO geostationary earth orbit
- HEO high Elliptical orbit
- the operating orbit altitude of the LEO satellite is between 300km and 1500km.
- the orbital altitude of MEO satellites is between 7000km and 25000km.
- the orbital altitude of GEO satellites is 35786km.
- the orbital altitude of HEO satellites is between 400km and 50,000km.
- the non-terrestrial network gateway can be an earth station or gateway located on the ground, which can provide sufficient radio frequency (radio frequency, RF) power and RF sensitivity to realize the communication between ground equipment (such as network equipment) and satellites. connect.
- the non-terrestrial network gateway is a node of the transport network layer (TNL).
- the network device is a device having a sending and receiving function, and is used for communicating with a terminal device.
- the network device may be responsible for radio resource management (radio resource management, RRM), quality of service (quality of service, QoS) management, data compression and encryption, data sending and receiving, etc. on the air interface side.
- RRM radio resource management
- QoS quality of service
- the network device may be a base station (base station, BS) in a communication system or a device deployed in a radio access network (radio access network, RAN) to provide a wireless communication function.
- BS base station
- radio access network radio access network
- the evolved node B (evolutional node B, eNB or eNodeB) in the LTE communication system, the next generation evolved node B (next generation evolved node B, ng-eNB) in the NR communication system, and the The next generation node B (next generation node B, gNB), the master node (master node, MN) in the dual connection architecture, the second node or the secondary node (secondary node, SN) in the dual connection architecture, etc., will not be specified. limit.
- the network device can also be a device in the core network (core network, CN), such as access and mobility management function (access and mobility management function, AMF), user plane function (user plane function, UPF) etc.; it can also be an access point (access point, AP) in a wireless local area network (wireless local area network, WLAN), a relay station, a communication device in a future evolved PLMN network, a communication device in an NTN network, etc.
- core network core network, CN
- AMF access and mobility management function
- UPF user plane function
- AP access point
- WLAN wireless local area network
- relay station a communication device in a future evolved PLMN network
- communication device in an NTN network etc.
- the network device may include an apparatus that provides a wireless communication function for the terminal device, such as a chip system, a chip, or a chip module.
- the chip system may include a chip, or may include other discrete devices.
- the network device may communicate with an Internet Protocol (Internet Protocol, IP) network.
- Internet Protocol Internet Protocol
- IP Internet Protocol
- the Internet Internet
- private IP network private IP network or other data networks and the like.
- the network device may be an independent node to implement the functions of the base station, or the network device may include two or more independent nodes to implement the functions of the base station.
- the network device includes a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU), such as gNB-CU and gNB-DU.
- the network device may further include an active antenna unit (active antenna unit, AAU).
- the CU implements a part of the functions of the network equipment
- the DU implements another part of the functions of the network equipment.
- the CU is responsible for processing non-real-time protocols and services, implementing the radio resource control (radio resource control, RRC) layer, service data adaptation protocol (service data adaptation protocol, SDAP) layer, and packet data convergence (packet data convergence protocol, PDCP) layer function.
- the DU is responsible for processing physical layer protocols and real-time services, and realizes functions of a radio link control (radio link control, RLC) layer, a medium access control (medium access control, MAC) layer, and a physical (physical, PHY) layer.
- the AAU can implement some physical layer processing functions, radio frequency processing and related functions of active antennas.
- the network device may include at least one of CU, DU, and AAU.
- the CU can be divided into network devices in the RAN, or the CU can also be divided into network devices in the core network, which is not specifically limited.
- the network device can provide services for a cell, and the terminal devices in the cell can communicate with the network device through transmission resources (such as spectrum resources).
- the cell may be a macro cell, a small cell, a metro cell, a micro cell, a pico cell, a femto cell, and the like.
- a transparent satellite (transparent satellite) communication system is adopted in the embodiment of the present application.
- the transparent satellite (Transparent satellite) communication system adopts transparent payload.
- the schematic diagram of the transparent satellite communication system architecture is shown in Fig. 2 .
- the terminal equipment, non-terrestrial network gateway and gNB are located on the earth's surface, and the satellite is located in the earth's orbit. Satellites, non-terrestrial network gateways and gNBs form a radio access network (NG-radio access network, NG-RAN).
- NG-RAN radio access network
- NG-RAN is connected to the 5G core network through the NG interface.
- satellites In the NTN communication system, satellites usually generate one or more beams (beams, or beam footprints) within a given service area, and the shape of the beams is usually elliptical.
- beams beams, or beam footprints
- related descriptions can refer to 3GPP standards.
- the beams generated by some satellites (such as LEO satellites) will also move with the movement of the satellite in a fixed orbit; or, the beams generated by some satellites (such as LEO satellites or GEO satellites) on the ground will not move with the movement of the satellite The movement of the satellite in a fixed orbit.
- the beam generated by a satellite does not move as the satellite moves on a fixed orbit.
- the beam generated by the satellite will move as the satellite moves on the fixed orbit. Further, in the case where the relative distance between the satellite and the beam generated by the satellite is fixed, the variation of the path loss is small.
- the difference in the propagation distance between the terminal equipment (such as UE) and the satellite in different geographic locations is small (that is, within the coverage of the same beam/cell, the difference in the path loss of signals corresponding to terminal devices in different geographic locations is small), which in turn leads to the reception quality of signals corresponding to terminal devices in different geographic locations within the coverage of the same beam (
- the difference between the downlink signal reception quality of the terminal equipment or the uplink signal reception quality of the base station) is very small, as shown in (b) of FIG. 4 .
- terminal devices 4201 and 4202 In the land network communication system shown in (a) of FIG. 4 , there are terminal devices 4201 and 4202 with different geographic locations within the coverage of the same beam/cell.
- the signal reception quality corresponding to the terminal device 4201 is different from the signal reception quality corresponding to the terminal device 4202. There are large differences in quality.
- the architecture of the NTN communication system in the embodiment of the present application mainly includes the NTN communication architecture with transparent satellite (transparent satellite) (i.e. adopts transparent payload) and the NTN communication architecture with regenerative satellite (regenerative satellite) (i.e. adopts regenerative payload), See Figure 5.
- transparent satellite transparent satellite
- regenerative satellite regenerative satellite
- FIG. 5 (a) of FIG. 5 exemplifies the NTN communication architecture with transparent satellites
- FIG. 5 (b) exemplifies the NTN communication architecture with regenerative satellites.
- a satellite 510 in a transparent forwarding mode generates at least one beam 520, and the at least one beam 520 may form a cell.
- the terminal device 530 located in the cell can measure at least one beam of the cell, select one beam from the at least one beam according to the beam measurement result, and establish a communication connection with the satellite 510 through the selected beam.
- the satellite 540 of the regenerated signal pattern generates at least one beam 550, and the at least one beam 550 may form one cell.
- the terminal device 560 located in the cell can measure at least one beam of the cell, select one beam from the at least one beam according to the beam measurement result, and establish a communication connection with the satellite 540 through the selected beam.
- the whole process includes 4 steps: transmission of random access request message, transmission of random access response (random access response, RAR) message, transmission of message 3 (Msg3) and the transmission of message 4 (Msg4).
- RAR random access response
- Msg3 message 3
- Msg4 message 4
- Step 1 Transmission of a random access request message, that is, the terminal device sends a random access request message to the network device.
- the random access request message may also be called message 1 (Msg1).
- the random access request message may include a random access preamble (random access preamble, RA preamble).
- RA preamble random access preamble
- the main function of the RA preamble may be to request access to the network device, so that the network device can estimate and finalize based on the RA preamble
- the transmission delay between end devices is used to calibrate the uplink timing, and the RAR message is used to indicate to the end device.
- Step 2 transmission of the RAR message, the network device receives the random access request message, and sends the RAR message to the terminal device.
- the RAR message may also be called message 2 (Msg2).
- the network device sends a RAR message to the terminal device on a PDSCH (Physical Downlink Shared Channel, physical downlink shared channel) payload (payload) resource.
- a RAR message is obtained by scrambling through RA-RNTI (random access radio network temporary identifier, random access radio network temporary identifier).
- RA-RNTI random access radio network temporary identifier, random access radio network temporary identifier
- the value of the RA-RNTI is determined by the time-frequency resource location of the resource bearing the RA preamble.
- the terminal device can listen to the PDCCH in the RAR time window according to the RA-RNTI to obtain DCI, and then the terminal device uses the RA-RNTI to parse the PDSCH payload according to the DCI to receive the corresponding RA-RNTI scrambled RAR message. If no RAR message is received within the RAR time window, it is considered that the random access procedure fails.
- the RAR message may include the time adjustment required for specifying the uplink synchronization, the uplink resources required by the terminal device to send the message 3, the temporary C-RNTI, and the like.
- Step 3 the transmission of the message 3, the terminal device receives the RAR message, and sends the message 3 to the network device.
- the message 3 is Msg3.
- the terminal device sends Msg3 to the network device on PUSCH (Physical Uplink Share Channel, physical uplink shared channel).
- Msg3 includes the unique identifier of the terminal device. This flag can be used for conflict resolution in Step 4.
- the unique identifier of the terminal device is C-RNTI; for another example, for a terminal device in a non-RRC_CONNECTED state, the only identifier for the terminal device is the unique terminal device identifier from the core network (eg S-TMSI or a random number).
- the core network eg S-TMSI or a random number
- Step 4 transmission of message 4, the network device receives Msg3, and sends message 4 to the terminal device.
- message 4 may also be called Msg4.
- the network device carries the flag for uniquely identifying the terminal device in Msg4 to indicate the winning terminal device, and other terminal devices that do not win the conflict resolution will re-initiate random access. If the PDSCH received by the terminal device in Msg4 is scrambled by the TC-RNTI specified in the RAR message, when the UE Contention Resolution Identity MAC control element contained in the successfully decoded MAC PDU matches the CCCH SDU sent by Msg3, the terminal The device will consider that the random access is successful and convert its TC-RNTI into a C-RNTI.
- the 2-step random access process helps to reduce the access delay of the terminal device.
- the 2-step random access process mainly includes the following two steps:
- Step 1 MsgA transmission, that is, the terminal device sends the MsgA to the network device.
- MsgA includes a random access request message.
- MsgA also includes Msg3.
- the Msg3 here refers to the Msg3 in the above 4-step random access process. That is to say, MsgA includes two parts: RA preamble and PUSCH payload.
- Step 2 the transmission of MsgB, that is, the network device receives MsgA and sends MsgB to the terminal device.
- MsgB may also be called message B, including Msg2 and Msg4.
- Msg2 refers to Msg2 in the above 4-step random access process
- Msg4 refers to Msg4 in the above 4-step random access process.
- RA preamble can be composed of cyclic prefix (CP) and sequence (sequence).
- RA preamble can support 4 long sequences with a length of 839 and 9 short sequences with a length of 139, and the length of the sequence formed by the RA preamble can be indicated by the high-level parameter prach-RootSequenceIndex.
- Each cell has 64 available RA preambles, forming an RA preamble sequence, and each RA preamble has a unique index (RA preamble index) in the RA preamble sequence.
- the terminal device will select one (or one designated by the network device) RA preamble from the RA preamble sequence to use the physical random access channel opportunity (PRACH occasion, RO) for transmission, that is, the RA preamble is carried (or transmitted) by the PRACH occasion ).
- PRACH occasion physical random access channel opportunity
- RA preamble sequence can include the following two parts:
- CBRA preamble contention-based random access preamble
- CFRA preamble non-contention-based random access preamble
- the other part is other RA preamble sequences except those indicated by the high-level parameter totalNumberOfRA-Preambles.
- the RA preambles in the other RA preamble sequence are used for other purposes, such as requesting system information (SI).
- the above 64 RA preambles are used for contention-based random access and non-contention-based random access.
- CBRA preambles can be divided into two groups: group A (group A) and group B (group B).
- group B does not necessarily exist, and it can be configured by the high-level parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB.
- the network device can configure the parameters required for contention-based random access through the high-level parameter RACH-ConfigCommon (carried by BWP-Common in SIB1), and the network device can configure the parameters for non-contention-based random access through the high-level parameter RACH-ConfigDedicated The parameters required for random access.
- the transmission of the PRACH message needs to use time-frequency resources, and the PRACH time-frequency resources are divided to obtain at least one physical random access channel opportunity (PRACH occasion, RO).
- PRACH occasion PRACH occasion
- the RO is used to transmit or carry a random access request message.
- ROs may include time domain resources and frequency domain resources.
- the time-domain resource may be indicated by an index of the time-domain resource
- the frequency-domain resource may be indicated by an index of the frequency-domain resource.
- the time domain location or time domain resource of RO that is, the PRACH time domain resource used to transmit/carry RA premble/Msg1
- the network device can be configured to the terminal device through the parameter prach-ConfigurationIndex in the high-level parameter RACH-ConfigGeneric, such as specific configuration
- the method can be seen in Table 1.
- Table 1 defines random access configurations for FR1 and paired spectrum/supplementary uplink. Among them, n f represents the system frame number, x represents the PRACH configuration cycle, The number of ROs in a PRACH slot, Indicates the time-domain symbol length of an RO.
- the random access preamble format adopts A1/B1;
- the starting position of the time domain resources of the RO is under the 4th subframe in the system frame, starting from the 0th OFDM symbol;
- the time-domain symbol length of RO is 2 That is, it occupies 2 OFDM symbols.
- the time domain resources identified by the indexes of two adjacent time domain resources may be continuous or discontinuous, for example, the index of the time domain resources is index 0
- the time domain resource identified by index 0 is the 0th to 1st OFDM symbols under the 4th subframe in the system frame
- the time domain resource identified by index 1 is the 4th subframe in the system frame The 2nd to 3rd OFDM symbols under the frame.
- the parameter msg1-FrequencyStart in the high-level parameter RACH-ConfigGeneric can be used to configure the offset from the initial frequency domain resource position of the RO to the initial BWP (intial BWP) or the current active BWP (active BWP) initial frequency domain resource position ( offset);
- the parameter msg1-FDM in the high-level parameter RACH-ConfigGeneric can be used to configure the number of frequency domain resource indexes of the RO.
- the frequency of the cell increases, and the coverage decreases accordingly.
- the form of coverage can no longer be used, but the form of beam sweeping (beam sweeping) can be used.
- Beam scanning is to concentrate energy in a certain direction at a certain moment, and this direction can send the signal farther, but the signal cannot be received in other directions; then, send it in another direction at the next moment; finally, through Continuously change the beam direction to achieve the coverage of the entire cell.
- SSB has multiple transmission opportunities in the time domain period, and has a corresponding index (index), that is, SSB index.
- Each beam may correspond to (map/associate) at least one SSB index, and beams corresponding to different SSB indices may be the same (in the same direction) or different (in different directions).
- SSB is in units of half frame 5ms, which is an SS burst set. All SSBs in an SS burst set must be sent periodically in the same half frame. SSBs appear several times in a certain half-frame at intervals, and each of these several SSBs corresponds to a beam scanning direction, and finally there will be one SSB in each direction.
- the terminal device when the beam scanning signal of SSB covers the terminal device, the terminal device has the opportunity to send RA preamble, that is, beam corresponding (association/mapping) RA preamble.
- RA preamble that is, beam corresponding (association/mapping) RA preamble.
- the network device can know the best downlink beam or the best downlink beam. That is to say, the network device knows which beam points to the terminal device.
- the SSB needs to correspond (associate/map) to the RA preamble.
- the RA preamble needs to be sent based on the RO, that is, the RA preamble needs to be carried (or transmitted) by the RO, the SSB needs to be associated (mapped/corresponded) with the RO so that the network device knows which beam to send Msg2 to the terminal device.
- the network device can configure N (where N is configured by the L1 parameter SSB-per-rach-occasion) SSB association (mapping/corresponding) to a RO (N ⁇ 1) for the terminal device through the high-level parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB , or the network device configures an SSB association (mapping/corresponding) 1/N (where N is configured by the L1 parameter SSB-per-rach-occasion) RO(N ⁇ 1), and each SSB is associated (mapped/corresponded) R (where R is configured by the L1 parameter CB-preambles-per-SSB) RA preamble index.
- the value of N may be ⁇ 1/8, 1/4, 1/2, 1, 2, 4, 8, 16 ⁇ .
- One is, N ⁇ 1, in this case, one SSB can be associated with 1/N valid ROs.
- the preamble associated with the SSB starts from RA preamble index 0.
- N SSBs are associated with one RO.
- SSB n can select one of the R preambles to send Msg1, 0 ⁇ n ⁇ N-1, n refers to the SSB index, and the preamble associated with the SSB n is from the RA preamble index as start. in, It is configured by the high-level parameter totalNumberOfRA-Preambles and is an integer multiple of N.
- N 2
- two SSBs are associated with one RO
- the RA preamble index associated with SSB0 starts from 0
- the RA preamble index associated with SSB1 starts from 32. That is to say, SSB0 is associated with RA preambles whose index is 0-31, and SSB1 is associated with RA preambles whose index is 32-(the total number of corresponding RA preambles-1).
- the network side does not configure high-level parameters (such as tdd-UL-DL-ConfigurationCommon), and at the same time, the time domain resource location of the RO is in the SSB After the symbol position, and at least N gap symbols away from the symbol position of the last SSB received by the terminal device, the RO is valid, that is, a valid RO.
- the relationship between N gap and RA preamble subcarrier spacing can be shown in Table 2.
- the network side configures high-level parameters (such as tdd-UL-DL-ConfigurationCommon), configure the RO in the uplink resource, and the time domain resource position of the RO is after the symbol position of the SSB, and is the same as the last If the symbol positions where the SSB is located are at least N gap symbols apart, then the RO is valid, that is, a valid RO.
- high-level parameters such as tdd-UL-DL-ConfigurationCommon
- N gap is 0; for the RA preamble sequence whose subcarrier spacing (SCS) is 15kHz/30kHz/60kHz/120kHz, The value of N gap is 2.
- mapping relationship between SSB and RO can be mapped in the following order:
- the frequency domain resource index (frequency resource index) order of the frequency multiplexed RO (frequency multiplexed) RO is descending increased;
- time domain resource index (time resource index) of the time division multiplexed (time multiplexed) RO in a PRACH slot is increasing;
- mapping relationship between SSB and RO is illustrated below with an example.
- SSB 0 is mapped to four ROs in turn, that is, the index of the time domain resource of the RO is index 0, and the index of the frequency domain resource is index 0, index 1, index 2 , in the RO of index 3.
- SSB 1 is mapped to four ROs in sequence according to the increasing order of the index of the frequency domain resources, that is, the time of the ROs.
- the index of the domain resource is index 1
- the frequency domain resource indexes are in the ROs of index 0, index 1, index 2, and index 3, and so on.
- SSBs 4 to 7 are mapped to the time-domain resource index of the RO in order of increasing frequency-domain resource index as index 2.
- the frequency domain resource index is in the RO of index 0, index 1, index 2, index 3, and so on.
- SSB 0/1 maps the time domain resource index of RO to index 0, and the index of the frequency domain resource is index 0 on the RO
- SSB 2/3 maps the index of the time domain resource of the RO to index 0, and the frequency domain resource index is On the RO with index 1
- SSB 4/5 maps the index of the time domain resource of the RO to index 0, and on the RO with the index of the frequency domain resource at index 2
- the index of the time domain resource mapped to the RO by SSB 6/7 is index 0, and the index of the frequency domain resource is on the RO of index 3.
- the rest can be deduced in the same way.
- the CSI-RS is similar to SSB, and the CSI-RS ID has a corresponding relationship with the beam. If the random access process is triggered by a high-level request, and the CSI-RS index is associated with the RO, then if the parameter ra-PreambleIndex is not 0, the parameter ra-OccasionList indicates the RO set associated with the CSI-RS Index.
- the terminal device can use the RO to transmit (carry) Msg1.
- the terminal device can use the RO to transmit (carry) Msg1.
- the network device notifies the terminal device through a special DCI format 1_0 that it needs to initiate a random access process, and notifies the terminal device of the ra-PreambleIndex, SSB Index, PRACH Mask Index and the UL/SUL Indicator indicating whether UL or SUL should be used .
- ⁇ MAC layer trigger The terminal device selects RA preamble to initiate the random access process.
- ⁇ RRC layer triggers: such as initial access, re-establishment, handover, transition from RRC_INACTIVE to RRC_CONNECTED state, request for other SI, RRC request during synchronous reconfiguration, etc.
- the value range of the RA preamble index has an association (mapping/corresponding) relationship with the SSB index or the CSI-RS index, and the SSB index or the CSI-RS index has a mapping relationship with the RO.
- the terminal device can obtain the SS-RSRP of the SSB through channel estimation, and then compare the SS-RSRP of the SSB with the parameter rsrp-ThresholdSSB. If there is an SSB whose SS-RSRP is greater than the parameter rsrp-ThresholdSSB, the terminal device selects the SSB; otherwise, the terminal device selects an SSB arbitrarily.
- the terminal device randomly selects one SSB from the multiple SSBs.
- the terminal device When selecting a CSI-RS, compare the CSI-RSRP of the CSI-RS with the parameter rsrp-ThresholdCSI-RS. If there is a CSI-RS whose CSI-RSRP is greater than the parameter rsrp-ThresholdCSI-RS, the terminal device selects the CSI-RS. RS.
- the RA preamble index can be selected by the terminal device or indicated by the network device.
- the time-frequency resource location of the RO determines the RA-RNTI value.
- the terminal device After transmitting the RA preamble, the terminal device will calculate the RA-RNTI according to the time-frequency resource position of the RO in order to receive the RAR scrambled by the RA-RNTI.
- non-contention random access preamble :
- RA-RNTI 1+s_id+14 ⁇ t_id+14 ⁇ 80 ⁇ f_id+14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id
- s_id is the index of the first OFDM symbol of the RO (0 ⁇ s_id ⁇ 14)
- t_id is the index of the first slot of the RO in the system frame (0 ⁇ t_id ⁇ 80)
- f_id is the RO in the frequency domain
- ul_carrier_id is the UL carrier used for RA preamble transmission (0 means normal uplink carrier, 1 means SUL carrier).
- the 3GPP standard usually assumes that the antenna gain of the terminal equipment in the NTN communication system is 0dBi, but in the actual communication process, the antenna gain of the terminal equipment often cannot meet the above requirements. Since the antenna gain of the terminal device cannot meet the requirement, when the terminal device performs random access, the network device may not successfully receive the random access request message (such as message 1 or Msg1 ) sent by the terminal device. For this, it is necessary to enhance the coverage under the NTN communication system to ensure the successful transmission of the random access request message.
- the random access request message such as message 1 or Msg1
- the embodiment of the present application introduces indication information, so that the network device can indicate to the terminal device the number of repetitions (repetition) of the random access request message configured for the SSB index or SSB through the indication information, and then the terminal device can according to the selected The number of repetitions of the random access request message corresponding to the SSB, and the random access request message is sent to the network device multiple times (or repeatedly), thus helping to achieve coverage enhancement, improve the transmission reliability of the random access request message, and improve the terminal Probability of device random access success.
- the network device may send indication information, and the indication information may be used to indicate the repetition times of the random access request message, and the repetition times of the random access request message correspond to (associate or map) the SSB index.
- the indication information may be used to indicate the number of repetitions of the random access request message, and may be replaced by the following description, the indication information may be used to configure the number of repetitions of the random access request message .
- the terminal device may receive the indication information, and send a random access request message according to the number of repetitions of the random access request message.
- the distance between the coverage area of different beams and the satellite is also different, so the signal strength of different beams is also different, for example, the signal at the center of satellite coverage The strength is greater than the signal strength of the edge portion. Since beams are used for random access, when a terminal device performs random access in coverage areas of different beams, the required number of repetitions of Msg1 may be different.
- the network device can configure the repetition times of Msg1 for the SSB index (index) in the cell.
- the repetition times of Msg1 configured for the SSB index corresponding to the beam may be used in the random access process. It can also be understood that the SSB index in the cell corresponds to the number of repetitions of Msg1.
- the terminal device may have an opportunity to send Msg1. Since the SSB associated with the beam corresponds to the number of repetitions of Msg1, the terminal device can transmit according to the number of repetitions of Msg1 corresponding to the selected SSB, which is beneficial to achieve coverage enhancement.
- the SSB needs to correspond to the RA preamble.
- the RA preamble needs to be carried (or transmitted) by the RO, the SSB corresponding to the number of repetitions of Msg1 needs to be associated with the RO.
- the network device selects the value of the repetition number of Msg1 configured for the SSB index from the candidate value set of the repetition number of Msg1 .
- the number of repetitions of Msg1 corresponding to different SSB indexes may be different or the same, which is mainly determined by the specific implementation of the network device.
- the SSBs of the SSB indexes corresponding to the repetition times of the same Msg1 belong to one SSB group. That is to say, the number of repetitions of Msg1 corresponding to each SSB index belonging to the same SSB group is the same.
- the number of repetitions of the random access request message may be used to indicate the number of times (or repetitions) of the random access request message being transmitted multiple times. For example, the number of repetitions for Msg1.
- the first cell in this embodiment of the present application may be a cell where the terminal device resides, may be a cell selected by the terminal device in cell search, or may be a serving cell of the terminal device, etc., and there is no specific limitation on this.
- the first cell may be a serving cell of the terminal device.
- the first cell is a serving cell of the terminal device.
- the first cell may be a cell where the terminal device resides.
- the first cell is the cell where the terminal device resides. It should be noted that, in the embodiment of the present application, the terminal device initially accesses the network, and the cell where the terminal resides may also be understood as the serving cell of the terminal device.
- the terminal device in response to turning off the airplane mode or turning on the device, the terminal device initiates a process of initially accessing the network to the network device.
- the first cell refers to a cell used to provide services for terminal devices, and may also be a cell used for terminal devices to access the network, etc., and may also be described by other terms, such as target cells, etc., only with the same
- the meaning/function/interpretation are all within the scope of protection claimed by the embodiments of the present application.
- the embodiment of the present application introduces indication information, and the network device indicates or configures the number of repetitions of Msg1 for the terminal device through the indication information.
- the correspondence between the number of repetitions of Msg1 and the SSB index may be configured by the network, may be pre-configured, may be stipulated by a protocol, and may be explicitly or implicitly indicated, and there is no specific limitation on this.
- the network device may directly indicate the corresponding relationship to the terminal device.
- the network device may indicate the number of repetitions of Msg1 in the order of the SSB index indicated to the terminal device, so as to implicitly indicate the corresponding relationship to the terminal device, which helps to reduce signaling overhead.
- the network device instructs the terminal devices SSB0 , SSB1 and SSB2 in sequence, and the repeat times of Msg1 indicated sequentially through the indication information are 1, 2 and 3.
- the repetition count of Msg1 corresponding to SSB0 is 1
- the repetition count of Msg1 corresponding to SSB1 is 2
- the repetition count of Msg1 corresponding to SSB2 is 3.
- indication information may also be described in other terms, such as first information, configuration information, etc., as long as they have the same meaning/function/interpretation, they are all within the scope of protection claimed in the embodiments of the present application.
- the indication information may be sent or received during cell search, cell reselection, uplink and downlink synchronization, cell access, cell camping, initial access, or uplink and downlink resource scheduling.
- the indication information may be carried by system information (SI), high-level signaling (such as RRC signaling), terminal equipment-specific signaling, and the like.
- SI system information
- high-level signaling such as RRC signaling
- terminal equipment-specific signaling and the like.
- the network device may broadcast system information, and the system information carries the indication information, so as to configure the number of repetitions of Msg1 through broadcasting.
- the SSB index may be indicated by the network device to the terminal device through system information or high-level parameters, so as to realize The current network device configures SSB for the terminal device.
- the network device may indicate the SSB index for the terminal device in processes such as cell search, cell reselection, uplink and downlink synchronization, cell access, cell camping, initial access, or uplink and downlink resource scheduling.
- the network device may indicate to the terminal device the SSB indexes of the multiple SSBs in the first cell through system information or high-layer parameters.
- the network device indicates the position of the first cell to the terminal device through SIB1 or ssb-PositionsInBurst in the high layer parameter ServingCellConfigCommon.
- the SSB index of each SSB so as to realize the configuration of the SSB of the terminal device.
- the network device in this embodiment of the present application may configure the repetition times of Msg1 corresponding to the SSB for the terminal device according to the SSB group.
- the indication information indicates P0, P0 is a positive integer greater than or equal to 1, P0 corresponds to SSB group 1, and SSB group 1 includes SSB1, SSB2 and SSB3, then the repetition times of Msg1 corresponding to SSB1, SSB2 and SSB3 are all P0, in In this case, P0 corresponds to the number of repetitions of Msg1 of SSB1, SSB2 and SSB3. In this way, it helps to save signaling overhead.
- the numbers of SSBs in different SSB groups may be the same or different, and this is not limited.
- the repetition times of Msg1 corresponding to the SSB may also be configured for the terminal device according to the SSB.
- the indication information indicates P1 and P2, P1 corresponds to SSB1, and P2 corresponds to SSB2.
- the number of repetitions of Msg1 corresponding to SSB1 is P1
- the number of repetitions of Msg1 corresponding to the SSB index of SSB2 is P2, where P1 and P2 may be the same or different.
- Both P1 and P2 are positive integers greater than or equal to 1.
- the indication information may only indicate the number of repetitions of one Msg1, or may indicate the number of repetitions of multiple Msg1s, which is not limited.
- the indication information is used to indicate K i , where K i is the number of repetitions of Msg1 corresponding to SSB index i, where the SSB identified by SSB index i is the SSB in the first cell, 1 ⁇ i ⁇ M, and i is A positive integer, M is the total number of SSBs in the first cell.
- the indication information is used to indicate K i and K j , for K i , reference may be made to the relevant introduction above, and details are not repeated here.
- K j is the number of repetitions of Msg1 corresponding to SSB index j, where the SSB identified by SSB index j is the SSB in the first cell, and the SSB identified by SSB index j is different from the SSB identified by SSS index i, that is j and i are different values. 1 ⁇ j ⁇ M, j is a positive integer.
- the repetition times of Msg1 corresponding to different SSB indexes are different. Take SSB index i and SSB index j as an example. SSB index i corresponds to K i , SSB index j corresponds to K j , and when the repetition times of Msg1 corresponding to different SSB indexes are different, K i and K j are different. Alternatively, the repetition times of Msg1 corresponding to SSBs corresponding to different beams are different. Take SSB index i and SSB index j as an example. SSB index i corresponds to K i , and SSB index j corresponds to K j .
- K i and K j are different. In some embodiments, if the beam corresponding to the SSB identified by the SSB index i is the same as the beam corresponding to the SSB identified by the SSB index j, then K i and K j may be different or the same.
- the network device may select from the set of candidate values of the repetition number of Msg1 to indicate the repetition number of Msg1 corresponding to the SSB index for the terminal device.
- the set of candidate values for the number of repetitions of Msg1 may be predefined by a protocol, determined by a network device based on a certain algorithm or policy, or instructed by other devices or servers, which is not limited.
- the repetition count candidate value set of Msg1 may include at least one candidate value.
- each candidate value is a power of 2.
- the set of candidate values for the number of repetitions of Msg1 is set ⁇ 1, 2, 4, 8, 16, . . . , 2 n ⁇ .
- the value of n may be predefined, may be predefined by a protocol, may be determined by a network device based on a certain algorithm or policy, or may be instructed by other devices or servers, and there is no specific limitation on this.
- the repetition times of Msg1 corresponding to the SSB index is a power of 2.
- the terminal device needs to use corresponding PRACH time-frequency resources, and divide the PRACH time-frequency resources to obtain at least one RO.
- the RO is used to transmit or carry a random access request message.
- the RO includes time domain resources and frequency domain resources.
- the time-domain resource may be indicated by an index of the time-domain resource
- the frequency-domain resource may be indicated by an index of the frequency-domain resource.
- the PRACH time-frequency resource may be configured by the network device to the terminal device through high-layer parameters.
- the network device may be configured to the terminal device during cell search, cell reselection, uplink and downlink synchronization, cell access, cell camping, initial access, or uplink and downlink resource scheduling.
- the network device can configure the time domain position or time domain resource of the RO through the parameter prach-ConfigurationIndex in the high layer parameter RACH-ConfigGeneric , and configure the frequency domain bit of the RO through the parameter msg1-FrequencyStart and the parameter msg1-FDM in the high-level parameter RACH-ConfigGeneric The number of frequency-domain resource indexes of configuration or RO, so as to realize the configuration of PRACH time-frequency resources.
- the mapping relationship between SSB and RO cannot be applied to the situation of multiple (or repeated) transmission of Msg1. If the terminal device needs to transmit the Msg1 multiple times (or repeatedly), the standard protocol specified by the existing 3GPP will no longer be applicable. Therefore, the embodiment of the present application needs to re-study the mapping relationship between the SSB index corresponding to the repetition number of Msg1 and the RO.
- the network device may indicate (configure) the SSBs of the first cell to the terminal device, for example, indicate M SSBs of the first cell to the terminal device.
- the terminal device may sequentially map the ROs corresponding to the SSB according to the following mapping sequence.
- mapping order can be as follows:
- ⁇ One is: sort in descending order according to the repetition times of Msg1 corresponding to the SSB indexes, and sort in ascending order by the SSB indexes with the same repetition times.
- the network device indicates to the terminal device the repetition times (K i ), for example, the correspondence between the SSB index and the number of repetitions of Msg1 is That is, the repetition times of Msg1 corresponding to SSB0 is 8, the repetition times of Msg1 corresponding to SSB1 is 2, and so on.
- mapping order is: SSB0 ⁇ SSB4 ⁇ SSB5 ⁇ SSB1 ⁇ SSB2 ⁇ SSB3.
- ⁇ The other is: sort in ascending order according to the repetition times of Msg1 corresponding to the respective SSB indexes, wherein the SSB indexes with the same repetition times are sorted in ascending order.
- ⁇ Another method is: sort in descending order according to the repetition times of Msg1 corresponding to the SSB indexes, wherein the SSB indexes with the same repetition times are sorted in descending order.
- ⁇ Another one is: sorting in ascending order according to the repetition times of Msg1 corresponding to the SSB indexes, wherein the SSB indexes with the same repetition times are sorting in descending order.
- ROs corresponding to SSBs may be sequentially mapped using SSB groups as a granularity.
- the mapping order can be as follows:
- ⁇ One is: sort in descending order according to the repetition times of Msg1 corresponding to each SSB group, and sort in ascending order by the SSB indexes in the same SSB group.
- the other is: sort in descending order according to the number of repetitions of Msg1 corresponding to each SSB group, and sort in descending order the SSB indexes in the same SSB group.
- ⁇ Another one is: sorting in ascending order according to the repetition times of Msg1 corresponding to each SSB group, and sorting in ascending order according to the SSB indexes in the same SSB group.
- ⁇ Another one is: sorting in ascending order according to the repetition times of Msg1 corresponding to each SSB group, and sorting in descending order by the SSB indexes in the same SSB group.
- the RO group includes K ROs in the time domain, and K is the maximum value among the repetition times of at least one Msg1 indicated by the network device to the terminal device.
- the embodiment of the present application needs to divide the time-domain resource index of the RO in the PRACH time-frequency resource.
- the RO group is obtained by sequentially dividing the time-domain resource indexes of the K ROs, so as to sequentially map the SSB index in the RO group.
- the time domain resource indexes of the ROs in the first RO group are index 0, index 1, index 2, index 3.
- index 4, index 5, index 6, index 7, the time domain resource indexes of ROs in the second RO group are index 8, index 9, index 10, index 11, index 12, index 13, index 14, index 15 ,And so on.
- the network device can indicate the number of frequency domain resource indexes of the RO to the terminal device through the parameter msg1-FDM in the high layer parameter RACH-ConfigGeneric.
- the mapping relationship between the SSB index in the first cell and the RO can be determined by high-layer parameters.
- the upper layer can pass the upper layer parameter (for example, the higher layer parameter is ssb- perRACH-OccasionAndCB-PreamblesPerSSB) to configure N (for example, N is configured by the L1 parameter SSB-per-rach-occasion) SSBs are associated (mapped/corresponded) to an RO, and each SSB in the N SSBs is associated (mapped/ Corresponding) R (for example, R is configured by the L1 parameter CB-preambles-per-SSB) RA preamble index.
- the higher layer parameter is ssb- perRACH-OccasionAndCB-PreamblesPerSSB
- the N SSBs are selected from SSBs in the first cell.
- the value of N may be one of 1/8, 1/4, 1/2, 1, 2, 4, 8, and 16.
- mapping rule of the SSB index is as follows.
- the N SSBs mapped to the same RO are distinguished by the RA preamble index.
- mapping rules can exist:
- T is the maximum value among the repetition times of Msg1 corresponding to each of the N SSB indexes, and the N The SSB is mapped according to the time-domain resource indexes of the T ROs.
- the RA preamble index associated with the one SSB mapped by the RO starts from 0;
- the two SSBs mapped by the ROs are distinguished by RA preamble index
- the S SSBs mapped to the RO are distinguished by RA preamble index .
- the ROs mapped to each of the N SSB indexes are the same or/or different.
- the N SSB indexes map to the same RO, then the N SSB indexes are distinguished by the RA preamble index in the same (same) RO.
- N 2 SSBs are mapped to 1 RO.
- SSB0 and SSB1 need to be mapped to the same RO, and the number of repetitions of Msg1 corresponding to SSB0 is 8, and the number of repetitions of Msg1 corresponding to SSB1 is 4, then 8 is used as the number of time domain resource indexes of the RO, that is, in the RO group
- the time-domain resource indexes of the eight ROs, and the two SSBs are mapped according to the time-domain resource indexes of the eight ROs.
- the first 4 ROs in the time domain resource index of the 8 ROs are all mapped to SSB0 and SSB1, and are distinguished by RA preamble index, while the last 4 ROs only map to SSB0, and the SSB0 associated with the last 4 ROs are mapped RA preamble index starts from 0.
- mapping relationship between SSB and RO can follow the following: the order of RA preamble index in an RO is increasing, and the SSB is mapped according to the increasing order (ascending order) of RA preamble index in RO.
- the SSB index is mapped to the RO, and the mapping is carried out according to the granularity of the RO group.
- the RO group includes K ROs in the time domain, and K is the maximum value among the repetition times of Msg1.
- the time-domain resource index is index 0-K-1
- the RO group with the smallest frequency-domain resource index has been mapped
- add the frequency-domain resource index and/or the time-domain resource index to obtain the next RO group Then continue to map in the RO group sequentially according to the order of the time domain resource index from small to large, and so on.
- the number of repetitions of Msg1 corresponding to the SSB index is packaged and mapped in the time domain.
- the number of repetitions of Msg1 corresponding to SSB0 is 8.
- mapping between the SSB index and the RO is sequentially performed with the RO group as the granularity.
- Msg1 may be sent according to the number of repetitions of Msg1, so as to achieve coverage enhancement.
- K i The configuration of K i from the network device to the terminal device is taken as an example for specific description below.
- the terminal device may send Msg1 according to K i .
- the embodiment of the present application also needs to determine multiple ROs according to K i , and send Msg1 through at least one RO in the multiple ROs to realize Msg1 Multiple (or repeated) transmissions.
- N can be configured by a high-level parameter (for example, the high-level parameter is configured by the L1 parameter SSB-per-rach-occasion).
- the terminal device may determine Mi ROs according to Ki in the following manner:
- M i ROs are divided into 1/N RO groups, and RO groups include K ROs in the time domain, and K can be the random access request message indicated by the indication information The maximum number of repetitions.
- the RO group includes the ROs where the time domain resources identified by the time domain resource indexes of the K ROs are located. That is, the RO group includes K ROs in the time domain.
- K i K, which means that the number of repetitions of Msg1 corresponding to the SSB index i (that is, K i ) is the maximum value.
- N ⁇ 1 means that one SSB can map N ROs. Since the embodiment of the present application needs to divide the time-domain resource index of the RO at the granularity of the maximum value of the repetition times of Msg1 corresponding to the SSB indexes in the first cell, the embodiment of the present application can determine 1/ There are N RO groups, and each RO group includes K ROs in the time domain, so one RO group is selected from the 1/N RO groups to obtain K ROs, so as to transmit Msg1 multiple times (or repeatedly).
- M i ROs are located in the same RO group, and the RO group includes K ROs in the time domain, and K is the random access request indicated by the indication information The maximum number of repetitions for the message.
- the RO group includes time-domain resource indexes of K ROs. That is, the RO group includes K ROs in the time domain.
- the RO includes time domain resources and frequency domain resources, the time domain resources can be indicated by the time domain resource index, and the frequency domain resources can be indicated by the frequency domain resource index.
- N>1 means that one RO can map N SSBs.
- the M i ROs determined according to K i are located in the same RO group, so that K i ROs are selected from the same RO group, so as to transmit Msg1 multiple times (or repeatedly).
- the RO group divides the time-domain resource indexes of the ROs according to the maximum value of the repetition times of Msg1 as the granularity.
- N ⁇ 1 means that one SSB can map N ROs.
- K i /N ⁇ K indicates that the number of repetitions of Msg1 corresponding to the SSB index i (that is, K i ) is not the maximum value.
- the M i ROs determined according to K i are located in the same RO group, so that K i ROs are selected from the same RO group, so as to transmit Msg1 multiple times (or repeatedly).
- the RO group divides the time-domain resource indexes of the ROs according to the maximum value of the repetition times of Msg1 as the granularity.
- N>1 means that one RO can map N SSBs.
- one RO may be mapped to N SSBs, and the number of repetitions of Msg1 corresponding to each of the N SSBs may be the same or different.
- the terminal device determines ROs in descending order (descending order) of the repetition times of Msg1 corresponding to the SSB index.
- the terminal device determines the ROs in ascending order (ascending order) for the SSB indexes with the repetition times of the same Msg1.
- mapping order can be sorted in descending order according to the number of repetitions of Msg1 corresponding to each SSB index, wherein The SSB index is sorted in ascending order.
- the terminal device determines the ROs sequentially in ascending order (ascending order) of the repetition times of Msg1 corresponding to the SSB index.
- the terminal device determines the ROs in ascending order (ascending order) for the SSB indexes with the repetition times of the same Msg1.
- mapping order can be sorted in ascending order according to the number of repetitions of Msg1 corresponding to each SSB index, wherein The SSB index is sorted in ascending order.
- the terminal device determines the ROs sequentially in descending order (descending order) of the repetition times of Msg1 corresponding to the SSB index. For the SSB index of the repetition times of the same Msg1, the terminal device is in descending order (descending order) to determine RO's.
- mapping order can be sorted in descending order according to the number of repetitions of Msg1 corresponding to each SSB index, wherein The SSB index is sorted in descending order.
- the terminal device determines the ROs in ascending order (in ascending order) of the repetition times of Msg1 corresponding to the SSB index. For the SSB indexes with the repetition times of the same Msg1, the terminal device determines ROs in descending order (descending order).
- mapping order can be sorted in ascending order according to the number of repetitions of Msg1 corresponding to each SSB index, wherein The SSB index is sorted in descending order.
- the signal sent by the satellite 1110 forms at least six beams in the cell, that is, beam 1121 , beam 1122 , beam 1123 , beam 1124 , beam 1125 and beam 1126 .
- Each of the six beams corresponds to one SSB, that is, beam 1121 corresponds to SSB0, beam 1122 corresponds to SSB1, beam 1123 corresponds to SSB2, beam 1124 corresponds to SSB3, beam 1125 corresponds to SSB4, and beam 1126 corresponds to SSB5.
- the network device configures the repetition times (K i ) of Msg1 for each of the six SSB indexes in the cell through the system information, that is,
- the network device configures N for the terminal device through the high-level parameter (such as the high-level parameter is the parameter SSB-per-rach-occasion), and configures the RO time domain for the terminal device through the high-level parameter (such as the high-level parameter is the parameter prach-ConfigurationIndex)
- the indexes of resources are index 0, index 1, index 2, index 3, index 4, index 5, index 6, index 7, index 8, index 9, index 10, index 11, index 12, index 13, index 14, index 15, ...
- the time domain resources identified by two adjacent time domain resource indexes may be continuous or discontinuous.
- mapping order is: SSB0 ⁇ SSB4 ⁇ SSB5 ⁇ SSB1 ⁇ SSB2 ⁇ SSB3.
- the time-domain resource indexes of ROs are index 0-15, etc.
- the ROs with the same frequency-domain resource indexes and the time-domain resources identified by index 0-7 are an RO group, and the frequency-domain resource indexes are the same, index 8
- the RO where the time domain resource identified by ⁇ 15 is located is another RO group, and so on. That is to say, one RO group includes time-domain resource indexes of 8 ROs.
- ⁇ Index the 6 SSBs first on the RO group whose time domain resource index is index 0 ⁇ 7 and the frequency domain resource index is the smallest, that is, on the RO group whose frequency domain resource index is index 0, according to the time domain resource index from small To the big order, the mapping is performed sequentially in the RO group.
- the frequency domain resource index is added to obtain the RO group whose frequency domain resource index is index 1 (that is, the following An RO group), and then continue to map in the RO group in sequence according to the order of the time domain resource index from small to large, and so on.
- the number of repetitions of Msg1 corresponding to the SSB index is packaged and mapped in the time domain.
- the 6 SSBs are indexed on the RO group when the time domain resource index is index 0 ⁇ 7, and the frequency domain resource index is increased to the maximum, that is, on the RO group whose frequency domain resource index is index 3, according to the time domain resource index
- the time domain resource index of 8 ROs is added to obtain the next RO group, that is, the time domain resource index of the next RO group is index 8-15, and the frequency domain resource index is index 0.
- the time-domain resource index is mapped in sequence in the RO group in ascending order of the time-domain resource index.
- the frequency-domain resource index is added to obtain the RO group whose frequency-domain resource index is index 1 (that is, the next RO group) , and then continue to map in the RO group sequentially in ascending order of the time-domain resource index, and so on.
- the number of repetitions of Msg1 corresponding to the SSB index is packaged and mapped in the time domain.
- N 1/2, it means that each of the 6 SSBs is mapped to 2 ROs.
- mapping order SSB0 is mapped first.
- the repetition number (K 0 ) of Msg1 corresponding to SSB0 is 8.
- the RO group whose time-domain resource index is index 0-7 and the frequency-domain resource index is the smallest map the SSB0 corresponding to the time-domain resource index in ascending order.
- RO and after all the ROs in the RO group with the smallest frequency domain resource index are mapped, increase the frequency domain resource index to obtain the RO group with the frequency domain resource index index1, and then follow the order of the time domain resource index from small to large, in order Map the RO corresponding to SSB0.
- SSB0 packages the overall mapping with 8 ROs on the RO group whose frequency domain resource index is index 0.
- SSB0 maps 8 ROs in the RO group, as shown in FIG. 12 .
- the 8 ROs in the dotted line box in Fig. 12 are an RO group
- the resource index in the instant domain is index 0-7
- the resource index in the frequency domain is the RO group index 0.
- the frequency domain resource index is added for mapping, that is, mapping is performed on the RO group whose frequency domain resource index is index1, as shown in Figure 13 .
- the 8 ROs in the dotted line box in Figure 13 are an RO group after adding frequency domain resource index, that is, the RO group with index 0-7 and frequency domain resource index index1.
- the mapping order after the SSB0 mapping is completed, SSB4 is mapped next.
- the repetition number (K 4 ) of Msg1 corresponding to SSB4 is 4.
- SSB4 packages the overall mapping with 4 ROs on the RO group whose frequency domain resource index is index 2, as shown in Figure 14.
- the 8 ROs in the dashed box in Figure 14 are an RO group after adding the frequency domain resource index, the instant domain resource index is index 0-7, and the frequency domain resource index is the RO group index 2.
- mapping sequence after the SSB4 mapping is completed, SSB5 is mapped next.
- the repetition number (K 5 ) of Msg1 corresponding to SSB5 is 4.
- SSB5 packages the overall mapping with 4 ROs on the RO group whose frequency domain resource index is index 3, as shown in Figure 16.
- the 8 ROs in the dotted box in Figure 16 are an RO group after adding the frequency domain resource index, the instant domain resource index is index 0-7, and the frequency domain resource index is the RO group index 3.
- mapping sequence After the SSB5 mapping is completed, SSB1 is mapped next.
- the time domain resource index is index 0 to 7
- the frequency domain resource index is index 3
- the RO group mapping is completed, so the time domain resource index is increased according to the order of the time domain resource index from small to large, and the time domain resource index of 8 ROs is used again.
- the resource index is mapped to the granularity-divided RO group, as shown in Figure 18.
- the 8 ROs in the dotted box in Figure 18 are an RO group after adding the time domain resource index, the time domain resource index is index 8-15, and the frequency domain resource index is the RO group index 0.
- mapping sequence After the SSB1 mapping is completed, SSB2 is mapped next.
- the 8 ROs in the dotted line box in Figure 20 are an RO group
- the resource index in the real-time domain is index 8-15
- the resource index in the frequency domain is an RO group with index 0.
- mapping sequence After the SSB2 mapping is completed, SSB3 is mapped next.
- the 8 ROs in the dashed box in Figure 22 are an RO group after adding the frequency domain resource index, the instant domain resource index is index 8-15, and the frequency domain resource index is the RO group index 1.
- mapping order SSB0 is mapped first.
- the RO group whose time-domain resource index is index 0-7 and the frequency-domain resource index is the smallest that is, the RO group whose frequency-domain resource index is index0, map the ROs corresponding to SSB0 in order of time-domain resource index from small to large .
- SSB0 is mapped as a whole in 8 RO packages in the time domain, as shown in Figure 12.
- the mapping order after the SSB0 mapping is completed, SSB4 is mapped next.
- the 8 ROs in the dotted line box in FIG. 24 are an RO group after adding frequency domain resource index, that is, the RO group with index 0-7 and frequency domain resource index index1.
- mapping sequence After the SSB4 mapping is completed, SSB5 is mapped next.
- mapping SSB5 When mapping SSB5, it is similar to the above, as shown in Figure 25.
- mapping sequence After the SSB5 mapping is completed, SSB1 is mapped next.
- mapping SSB1 When mapping SSB1, it is similar to the above, as shown in Figure 26.
- the 8 ROs in the dotted box in Figure 26 are an RO group after adding the frequency domain resource index, the instant domain resource index is index 0-7, and the frequency domain resource index is the RO group index 2.
- mapping sequence After the SSB1 mapping is completed, SSB2 is mapped next.
- mapping SSB2 When mapping SSB2, it is similar to the above, as shown in Figure 27.
- mapping sequence After the SSB2 mapping is completed, SSB3 is mapped next.
- mapping SSB3 When mapping SSB3, it is similar to the above, as shown in Figure 28.
- mapping order SSB0 and SSB4 are mapped first.
- the repetition number (K 0 ) of Msg1 corresponding to SSB0 is 8
- the repetition number (K 4 ) of Msg1 corresponding to SSB4 is 4.
- map SSB0 and SSB4 correspondingly according to the order of time-domain resource index from small to large the RO.
- SSB0 and SSB4 are mapped to ROs whose time-domain resource index is index 0-3, and RA preamble index to distinguish.
- SSB0 is associated with The RA preamble index ranges from 0 to 31, and the RA preamble index associated with SSB4 ranges from 32 to 63.
- the mapping order After SSB0 and SSB4 are mapped, SSB5 and SSB1 are mapped next.
- the repetition number (K 5 ) of Msg1 corresponding to SSB5 is 4, and the repetition number (K 1 ) of Msg1 corresponding to SSB1 is 2.
- the frequency domain resource index is added for mapping. Select the first 4 ROs in the RO group whose time domain resource index is index 0-7, the frequency domain resource index is index 1, and the RO group whose real-time resource index is 0-3, and map SSB5 and SSB1, as shown in Figure 30 shown.
- SSB5 and SSB1 are mapped to ROs with time-domain resource indexes index 0 to 1, and are distinguished by RA preamble index.
- the RA preamble index associated with SSB5 is from 0 to 31
- the RA preamble index associated with SSB1 is from 32 to 63.
- mapping sequence After the mapping of SSB5 and SSB1 is completed, SSB2 and SSB3 are mapped next.
- the repetition number (K 2 ) of Msg1 corresponding to SSB2 is 2
- the repetition number (K 3 ) of Msg1 corresponding to SSB3 is 2.
- the RA preamble index associated with SSB2 is from 0 to 31
- the RA preamble index associated with SSB3 is from 32 to 63.
- the signal sent by the satellite 3210 has at least 6 beams in the cell, that is, the beam 3221 , the beam 3222 , the beam 3223 , the beam 3224 , the beam 3225 and the beam 3226 .
- each of the 6 corresponds to one SSB, that is, beam 3221 corresponds to SSB0, beam 3222 corresponds to SSB1, beam 3223 corresponds to SSB2, beam 3224 corresponds to SSB3, beam 3225 corresponds to SSB4, and beam 3226 corresponds to SSB5.
- the network device configures a Msg1 repetition number (K i ) for each of the six beams through system information, and divides the SSB indexes corresponding to the same Msg1 repetition number into one group to obtain three SSB groups, namely Among them, SSB Group 0 (SSB Group 0 ) includes SSB0, SSB Group 1 (SSB Group 1 ) includes SSB1, SSB2 and SSB3, SSB Group 2 (SSB Group 2 ) includes SSB4 and SSB5, and the repetition times of Msg1 corresponding to SSB Group 0 The number of repetitions of Msg1 corresponding to SSB group 1 is 2, and the number of repetitions of Msg1 corresponding to SSB group 2 is 4.
- the network device configures N for the terminal device through the high-level parameter (such as the high-level parameter is the parameter SSB-per-rach-occasion), and configures the RO time domain for the terminal device through the high-level parameter (such as the high-level parameter is the parameter prach-ConfigurationIndex)
- mapping order is: SSB group 0 ⁇ SSB group 2 ⁇ SSB group 1 .
- the time-domain resource indexes of ROs are respectively index 0-15, etc., wherein the ROs with the same frequency-domain resource indexes and the time-domain resources identified by index 0-7 are an RO group, and the frequency-domain resource indexes are the same,
- the RO where the time-domain resources identified by index 8-15 are located is another RO group, and so on. That is to say, one RO group includes time-domain resource indexes of 8 ROs.
- the SSB indexes in the three SSB groups are firstly indexed on the RO group whose resource index in the time domain is index 0 to 7 and the resource index in the frequency domain is the smallest, that is, the RO group whose resource index in the frequency domain is index 0. Resource indexes are mapped sequentially in the RO group in ascending order. Next, in the RO group whose resource index in the time domain is index 0-7 and the resource index in the frequency domain is the smallest After all the mapping is completed, increase the frequency domain resource index to obtain the RO group with the frequency domain resource index index 1 (that is, the next RO group), and then continue to map in the RO group in order of the time domain resource index from small to large, and so on. The number of repetitions of Msg1 corresponding to the SSB index is packaged and mapped in the time domain.
- the SSB index in the three SSB groups is on the RO group when the time domain resource index is index 0 ⁇ 7 and the frequency domain resource index is increased to the maximum, that is, the RO group with the frequency domain resource index being index 3, according to After the time-domain resource indexes are mapped in order from small to large, add 8 RO time-domain resource indexes to obtain the RO group, that is, the time-domain resource indexes of the RO group are index8-15, and the frequency-domain resource indexes of the RO group are index 0. Similarly, on the RO group whose time-domain resource index is index 8-15 and frequency-domain resource index is index 0, the time-domain resource index is mapped in the RO group in order from small to large.
- the frequency-domain resource index is index 8-15, and the frequency-domain resource index is index 0
- add the frequency-domain resource index to obtain the RO group with the frequency-domain resource index as index 1, and then follow the time-domain resource index
- the sequence from small to large continues to be mapped in the RO group, and so on.
- the number of repetitions of Msg1 corresponding to the SSB index is packaged and mapped in the time domain.
- N 2 SSBs in each SSB group are mapped to 1 RO.
- mapping order SSB group 0 is mapped first.
- the number of repetitions (K 0 ) of Msg1 corresponding to SSB group 0 is 8.
- the SSB group 0 On the RO group whose time domain resource index is index 0 to 7 and the frequency domain resource index is the smallest, that is, on the RO group whose frequency domain resource index is index 0, the SSB group 0 is mapped in sequence according to the order of the time domain resource index from small to large SSB0. Since SSB group 0 only includes one SSB index, SSB0 only occupies the first 32 RA preambles during mapping, and the remaining RA preambles are not mapped, as shown in Figure 33.
- mapping order after mapping SSB group 0, continue to map SSB group 2.
- the number of repetitions (K 2 ) of Msg1 corresponding to SSB group 2 is 4.
- the frequency domain resource index is added for mapping.
- the RA preamble index associated with SSB4 is from 0 to 31
- the RA preamble index associated with SSB5 is from 32 to 63.
- mapping sequence After mapping SSB group 2, continue to map SSB group 1.
- the repetition number (K 1 ) of Msg1 corresponding to SSB group 1 is 2.
- RA preamble index associated with SSB1 is from 0 to 31
- RA preamble index associated with SSB2 is from 32 to 63.
- mapping sequence After mapping SSB1 and SSB2, continue to map SSB3.
- the repetition number (K 1 ) of Msg1 corresponding to SSB group 1 is 2.
- the signal sent by the satellite 3710 forms at least three beams in the cell, that is, a beam 3721 , a beam 3722 and a beam 3723 .
- each of the three beams corresponds to one SSB, that is, beam 3721 corresponds to SSB0, beam 3722 corresponds to SSB1, and beam 3723 corresponds to SSB2.
- the network device configures the repetition times (K i ) of Msg1 for each of the three SSB indexes through the system information, that is,
- the network device configures N for the terminal device through the high-level parameter (such as the high-level parameter is the parameter SSB-per-rach-occasion), and configures the RO time domain for the terminal device through the high-level parameter (such as the high-level parameter is the parameter prach-ConfigurationIndex)
- mapping order is: SSB0 ⁇ SSB2 ⁇ SSB1.
- the time-domain resource indexes of ROs are respectively index 0-15, among which, the ROs with the same frequency-domain resource indexes and the time-domain resources identified by index0-3 are an RO group, and the frequency-domain resource indexes are the same, index4
- the ROs where the time-domain resources identified by ⁇ 7 are an RO group, the frequency-domain resource indexes are the same, and the ROs where the time-domain resources identified by indexes 8-11 are located are an RO group, the frequency-domain resource indexes are the same, and the ROs identified by indexes 12-15
- the RO where the time-domain resource of the resource is located is an RO group, and so on. That is to say, one RO group includes time-domain resource indexes of four ROs.
- the three SSB indexes are first mapped on the RO group whose time-domain resource index is index 0 ⁇ 3 and frequency-domain resource index is index0, and are mapped in the RO group according to the order of time-domain resource index from small to large.
- the ROs in the RO group After all the mapping is completed, add the time domain resource index to get the RO group whose time domain resource index is index 4 ⁇ 7 and frequency domain resource index is index0, and continue to map in the RO group in order of time domain resource index from small to large , and so on.
- N 1/2, it means that each of the 3 SSBs is mapped to 2 ROs.
- mapping order SSB0 is mapped first.
- the repetition number (K 0 ) of Msg1 corresponding to SSB0 is 4.
- the ROs corresponding to SSB0 are mapped in sequence according to the order of the time-domain resource index from small to large, and all ROs in the RO group After the mapping is complete, add the time domain resource index to get the RO group whose time domain resource index is index 4 to 7 and frequency domain resource index is 0, and map the ROs corresponding to SSB0 in order of time domain resource index from small to large.
- SSB0 packages the overall mapping with 4 ROs on the RO group whose frequency domain resource index is index 0.
- SSB0 maps the four ROs in the RO group, as shown in Figure 38.
- the four ROs in the dotted line box in Figure 38 are an RO group
- the resource index in the real-time domain is index 0-3
- the resource index in the frequency domain is the RO group index0.
- the four ROs in the dotted line box in Figure 39 are an RO group, the resource index in the real-time domain is index 4-7, and the resource index in the frequency domain is the RO group index0.
- the mapping sequence after the SSB0 mapping is completed, SSB2 is mapped next.
- the repetition number (K 2 ) of Msg1 corresponding to SSB2 is 2.
- SSB2 packs the overall mapping with 2 ROs in the time domain, as shown in Figure 40.
- the four ROs in the dashed box in Figure 40 are an RO group after adding time domain resource index, the time domain resource index is index 8-11, and the frequency domain resource index is the RO group index 0.
- mapping sequence After the SSB2 mapping is completed, SSB1 is mapped next.
- the four ROs in the dotted line box in Figure 42 are an RO group
- the resource index in the real-time domain is index 12-15
- the resource index in the frequency domain is an RO group with index 0.
- mapping order SSB0 is mapped first.
- the repetition number (K 0 ) of Msg1 corresponding to SSB0 is 4.
- the ROs corresponding to SSB0 are mapped in sequence according to the order of time-domain resource index from small to large.
- SSB0 is mapped in four RO packages in the time domain, as shown in Figure 38.
- mapping sequence After the SSB0 mapping is completed, SSB2 is mapped next.
- SSB2 packs the overall mapping with 2 ROs in the time domain, as shown in Figure 44.
- the four ROs in the dashed box in Figure 44 are an RO group after adding time domain resource index, the time domain resource index is index 4 to 7, and the frequency domain resource index is the RO group index 0.
- mapping sequence After the SSB2 mapping is completed, SSB1 is mapped next.
- mapping SSB1 When mapping SSB1, it is similar to the above, as shown in Figure 45.
- the mapping sequence SSB0 and SSB2 are mapped first.
- the repetition number (K 0 ) of Msg1 corresponding to SSB0 is 4, and the repetition number (K 2 ) of Msg1 corresponding to SSB2 is 2.
- the ROs corresponding to SSB0 and SSB4 are mapped sequentially according to the sequence of time-domain resource indexes from small to large.
- SSB0 and SSB2 are mapped to the ROs whose time-domain resource index is index 0-1, and RA preamble index to distinguish.
- the RA preamble index associated with SSB0 is from 0 to 31
- the RA preamble index associated with SSB2 is from 32 to 63.
- mapping order After the mapping of SSB0 and SSB2 is completed, SSB1 is mapped next.
- the repetition number (K 1 ) of Msg1 corresponding to SSB1 is 1.
- the time domain resource index is 0 to 3
- the RA preamble index associated with SSB1 is from 0 to 31, and the remaining RA preamble indexes are not mapped, as shown in Figure 47.
- the network device may also be a chip/chip module/device, etc.
- the terminal device may also be a chip/chip module/device, etc., which are not specifically limited.
- FIG. 48 it is a schematic flowchart of a communication method in the embodiment of the present application, which specifically includes the following steps:
- the network device sends indication information, where the indication information is used to indicate K i .
- K i is the number of repetitions of the random access request message corresponding to the SSB index i in the first cell, 1 ⁇ i ⁇ M, M is the total number of SSBs in the first cell, and K i is greater than or equal to 1 positive integer.
- the SSB indicated by the SSB index i is the SSB selected by the terminal device from the monitored SSBs.
- the terminal device receives the indication information.
- the terminal device sends a random access request message according to K i .
- the network device receives the random access request message.
- the network device can indicate to the terminal device the number of repetitions of the random access request message corresponding to the SSB index through the indication information, the terminal device can select a certain SSB according to the number of times used to identify the SSB The number of repetitions of the random access request message corresponding to the SSB index, and the random access request message is sent to achieve coverage enhancement, which is conducive to improving the transmission reliability of the random access request message and improving the possibility of successful random access of the terminal device .
- the number of repetitions for the terminal device to send the random access request message is not greater than K i .
- the terminal device sends the random access request message for the kth time the random access is successful. If k is less than K i , the terminal device does not need to send the random access request message repeatedly.
- the indication information may also indicate the repetition of two or more random access request messages
- the number of times, the specific number of times the terminal device sends the random access request message according to which random access request message is repeated, is related to which SSB the terminal device selects. Taking the terminal device selecting SSB1 as an example, the terminal device sends the random access request message according to the number of repetitions of the random access request message corresponding to SSB1.
- the network device may indicate to the terminal device the number of repetitions of the random access request message corresponding to the SSB through the system information. After listening to at least one SSB, the terminal device selects one SSB from the at least one SSB to camp on the cell, and sends the random access request message multiple times according to the number of repetitions of the random access request message corresponding to the selected SSB. For example, the repetition times of random access request messages indicated by different SSBs of the same cell may be the same or different. For example, the repetition times of the random access request message corresponding to SSB1 and the repetition times of the random access request message corresponding to SSB2 may be the same or different.
- the indication information may be sent or received during cell search, cell reselection, uplink and downlink synchronization, cell access, cell camping, initial access, or uplink and downlink resource scheduling. Do limited.
- the network device may also indicate to the terminal device the random access request message corresponding to the SSB through high-layer signaling (such as RRC signaling).
- high layer signaling includes indication information.
- the message or signaling carrying indication information is not limited in this embodiment of the present application.
- the indication information is used to indicate K i , where K i is the number of repetitions of Msg1 corresponding to SSB index i, where the SSB identified by SSB index i is the SSB in the first cell, and 1 ⁇ i ⁇ M, i is a positive integer, and M is the total number of SSBs in the first cell.
- the indication information is also used to indicate K j , where K j is the number of repetitions of Msg1 corresponding to the SSB index j, where the SSB identified by the SSB index j is the SSB in the first cell, and the SSB index j
- the identified SSB is different from the SSB identified by the SSS index i, that is, j and i are different values. 1 ⁇ j ⁇ M, j is a positive integer, and M is the total number of SSBs in the first cell.
- the repetition times of Msg1 corresponding to different SSB indexes are different. Take SSB index i and SSB index j as an example. SSB index i corresponds to K i , SSB index j corresponds to K j , and when the repetition times of Msg1 corresponding to different SSB indexes are different, K i and K j are different.
- SSB index i and SSB index j are two different SSB indexes
- the embodiment of the present application can configure different repetition times of Msg1 to different SSB indexes, that is, K i and K j are different, so as to improve Configuration flexibility.
- the repetition times of Msg1 corresponding to SSBs corresponding to different beams are different.
- SSB index i corresponds to K i
- SSB index j corresponds to K j . If the beam corresponding to the SSB identified by the SSB index i is different from the beam corresponding to the SSB identified by the SSB index j, K i and K j are different. In some embodiments, if the beam corresponding to the SSB identified by the SSB index i is the same as the beam corresponding to the SSB identified by the SSB index j, then K i and K j may be different or the same.
- the network device may select from the set of candidate values of the repetition number of Msg1 to indicate the repetition number of Msg1 corresponding to the SSB index for the terminal device.
- the set of candidate values for the number of repetitions of Msg1 may be predefined by a protocol, determined by a network device based on a certain algorithm or policy, or instructed by other devices or servers, which is not limited.
- the repetition count candidate value set of Msg1 may include at least one candidate value.
- each candidate value is a power of 2.
- the set of candidate values for the number of repetitions of Msg1 is set ⁇ 1, 2, 4, 8, 16, . . . , 2 n ⁇ .
- take SSB index i as an example.
- the repetition times of Msg1 corresponding to the SSB index is a power of 2.
- the sending of the random access request message according to K i in S4820 may include the following steps:
- the terminal device selects K i ROs from the M i ROs, and sends a random access request message.
- Msg1 needs to be carried (or transmitted) by ROs, in order to send Msg1, this embodiment of the present application needs to determine M i ROs according to K i , and send them through K i ROs in M i ROs Msg1 to realize multiple (or repeated) transmission of Msg1.
- the value of N is one of 1/8, 1/4, 1/2, 1, 2, 4, 8, and 16.
- the M i ROs are divided into 1/N RO groups, and the RO group includes K ROs in the time domain, where K is the maximum value among the repetition times of the random access request message indicated by the indication information.
- the RO group includes the ROs where the time domain resources identified by the time domain resource indexes of the K ROs are located. That is, the RO group includes K ROs in the time domain.
- K i K, which means that the number of repetitions of Msg1 corresponding to the SSB index i (that is, K i ) is the maximum value.
- N ⁇ 1 means that one SSB can map N ROs. Since the embodiment of the present application needs to repeat the Msg1 corresponding to the SSB indexes in the first cell The maximum number of times is the granularity to divide the time-domain resource index of the RO, so the embodiment of the present application can determine 1/N RO groups according to K i , and each RO group includes K ROs in the time domain, so that Select one RO group from the 1/N RO groups to obtain K ROs, so as to transmit Msg1 multiple times (or repeatedly).
- the M i ROs are located in the same RO group, and the RO group includes K ROs in the time domain, where K is the maximum value among the repetition times of the random access request message indicated by the indication information.
- the RO group may include time-domain resource indexes of K ROs. That is, the RO includes K ROs in the time domain.
- N>1 means that one RO can map N SSBs.
- the M i ROs determined according to K i are located in the same RO group, so that K i ROs are selected from the same RO group, so as to transmit Msg1 multiple times (or repeatedly).
- the RO group divides the time-domain resource indexes of the ROs according to the maximum value of the repetition times of Msg1 as the granularity.
- N ⁇ 1 means that one SSB can map N ROs.
- K i /N ⁇ K indicates that the number of repetitions of Msg1 corresponding to the SSB index i (that is, K i ) is not the maximum value.
- the M i ROs determined according to K i are located in the same RO group, so that K i ROs are selected from the same RO group, so as to transmit Msg1 multiple times (or repeatedly).
- the RO group divides the time-domain resource indexes of the ROs according to the maximum value of the repetition times of Msg1 as the granularity.
- N if N>1, the same RO corresponds to N SSBs.
- N>1 means that one RO can map N SSBs.
- the repetition times of the random access request messages corresponding to the N SSBs corresponding to the same RO are the same or different.
- one RO may be mapped to N SSBs, and the number of repetitions of Msg1 corresponding to each of the N SSBs may be the same or different.
- the terminal device sequentially determines the ROs in descending order of the number of repetitions of the random access request message corresponding to the SSB index.
- the terminal device determines the ROs in ascending order for the SSB indexes with the repetition times of the same random access request message.
- mapping order can be sorted in descending order according to the number of repetitions of Msg1 corresponding to each SSB index, wherein The SSB index is sorted in ascending order.
- the terminal device determines the ROs sequentially in ascending order (in ascending order) of the repetition times of Msg1 corresponding to the SSB index.
- the terminal device determines the ROs in ascending order (ascending order) for the SSB indexes with the repetition times of the same Msg1.
- the terminal device sequentially determines the ROs in descending order (descending order) of the repetition times of Msg1 corresponding to the SSB index.
- the terminal device determines the ROs in descending order (descending order) for the SSB indexes with the repetition times of the same Msg1.
- the terminal device determines the ROs sequentially in ascending order (in ascending order) of the repetition times of Msg1 corresponding to the SSB index. For the SSB indexes with the repetition times of the same Msg1, the terminal device determines ROs in descending order (descending order).
- the terminal device or network device includes corresponding hardware structures and/or software modules for performing various functions.
- the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may implement the described functionality using different methods for each particular application, but such implementation should not be considered as exceeding the scope of the present application.
- the terminal device or the network device may be divided into functional units according to the foregoing method examples.
- each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit.
- the above-mentioned integrated units can be implemented not only in the form of hardware, but also in the form of software program modules. It should be noted that the division of units in the embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation.
- FIG. 49 is a block diagram of functional units of a communication device according to an embodiment of the present application.
- the communication device 4900 includes: a receiving unit 4901 and a sending unit 4902 .
- the receiving unit 4901 may be a modular unit for sending and receiving signals, data, information, and the like.
- the sending unit 4902 may be a modular unit for processing signals, data, information, etc., which is not specifically limited.
- the communication device 4900 may also include a storage unit for storing computer program codes or instructions executed by the communication device 4900 .
- the storage unit may be a memory.
- the communication device 4900 may be a chip or a chip module.
- the receiving unit 4901 and the sending unit 4902 may be integrated into one unit, or separate units.
- the receiving unit 4901 and the sending unit 4902 may be integrated in a communication unit.
- the communication unit may be a communication interface, a transceiver, a transceiver circuit, and the like.
- the receiving unit 4901 and the sending unit 4902 may be integrated into a processing unit.
- the processing unit may be a processor or a controller, such as a central processing unit (central processing unit, CPU), a general purpose processor, a digital signal processor (digital signal processor, DSP), an application-specific integrated circuit (application-specific integrated circuit) circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
- the processing unit may also be a combination that realizes computing functions, for example, a combination of one or more microprocessors, a combination of DSP and a microprocessor, and the like.
- the receiving unit 4901 and the sending unit 4902 are used to perform any step performed by the terminal device, chip, chip module, etc. in the above method embodiments, such as data transmission such as sending or receiving. Detailed description will be given below.
- the receiving unit 4901 is configured to receive indication information, the indication information is used to indicate K i , K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1 ⁇ i ⁇ M, M is the total number of SSBs in the first cell, K i is a positive integer greater than or equal to 1;
- the sending unit 4902 is configured to send a random access request message according to K i , and the SSB indicated by the SSB index i is the SSB selected by the terminal device from the monitored SSBs.
- the indication information can indicate the SSB index or the number of repetitions of the random access request message configured by the SSB, and then the communication device 4900 can use the random access request message corresponding to the selected SSB The number of repetitions, sending the random access request message to the network device multiple times (or repeatedly), thus helping to achieve coverage enhancement, improve the transmission reliability of the random access request message, and improve the possibility of successful random access of the communication device 4900 .
- the indication information is used to indicate K i , where K i is the number of repetitions of Msg1 corresponding to SSB index i, where the SSB identified by SSB index i is the SSB in the first cell, and 1 ⁇ i ⁇ M, i is a positive integer, and M is the total number of SSBs in the first cell.
- the indication information is also used to indicate K j , where K j is the number of repetitions of Msg1 corresponding to SSB index j, where the SSB identified by SSB index j is the SSB in the first cell, and SSB index j The identified SSB is different from the SSB identified by the SSS index i, that is, j and i are different values. 1 ⁇ j ⁇ M, j is a positive integer, and M is the total number of SSBs in the first cell.
- K i is different from K j .
- the beam corresponding to the SSB indicated by the SSB index i is different from the beam corresponding to the SSB indicated by the SSB index j.
- the sending unit 3802 in terms of sending a random access request message, is configured to:
- the terminal device selects K i ROs from the M i ROs, and sends a random access request message.
- the value of N is one of 1/8, 1/4, 1/2, 1, 2, 4, 8, and 16.
- the M i ROs are divided into 1/N RO groups, and the RO group includes K ROs in the time domain, where K is the maximum value among the repetition times of the random access request message indicated by the indication information.
- the M i ROs are located in the same RO group, and the RO group includes K ROs in the time domain, where K is the maximum value among the repetition times of the random access request message indicated by the indication information.
- N if N>1, the same RO corresponds to N SSBs.
- the repetition times of the random access request messages corresponding to the N SSBs corresponding to the same RO are the same or different.
- the communications apparatus 4900 sequentially determines the ROs in descending order of the number of repetitions of the random access request message corresponding to the SSB index.
- the communications apparatus 4900 determines the ROs in ascending order for the SSB indexes with the repetition times of the same random access request message.
- FIG. 50 is a block diagram of functional units of another communication device according to an embodiment of the present application.
- the communication device 5000 includes: a sending unit 5001 .
- the sending unit 5001 may be a modular unit for sending and receiving signals, data, information, etc., which is not specifically limited.
- the communication device 5000 may further include a storage unit for storing computer program codes or instructions executed by the communication device 5000 .
- the storage unit may be a memory.
- the communication device 5000 may be a chip or a chip module.
- the sending unit 5001 is integrated in the processing unit.
- the processing unit may be a processor or a controller, such as a central processing unit (central processing unit, CPU), a general purpose processor, a digital signal processor (digital signal processor, DSP), an application-specific integrated circuit (application-specific integrated circuit) circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
- the processing unit may also be a combination that realizes computing functions, for example, a combination of one or more microprocessors, a combination of DSP and a microprocessor, and the like.
- the sending unit 5001 is integrated in the communication unit.
- the communication unit may be a communication interface, a transceiver, a transceiver circuit, and the like.
- the sending unit 5001 is configured to perform any step performed by the network device, chip, chip module, etc. in the above method embodiments, such as sending data/signals/information. Detailed description will be given below.
- the sending unit 5001 is configured to send indication information, where the indication information is used to indicate K i , where K i is the number of repetitions of Msg1 corresponding to the SSB index i, wherein the SSB identified by the SSB index i is the SSB in the first cell, 1 ⁇ i ⁇ M, i is a positive integer, and M is the total number of SSBs in the first cell.
- the communication device 5000 can indicate to the terminal device the number of repetitions (repetition) of the random access request message configured for the SSB index or SSB through the indication information, and then the terminal device can use the selected The number of repetitions of the random access request message corresponding to the SSB sends the random access request message to the communication device more than 5000 times (or repeats), thus helping to achieve coverage enhancement, improving the transmission reliability of the random access request message, and improving Probability of successful random access of the terminal device.
- FIG. 51 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
- the terminal device 5100 includes a processor 5110 , a memory 5120 and a communication bus for connecting the processor 5110 and the memory 5120 .
- the memory 5120 includes but is not limited to random access memory (random access memory, RAM), read-only memory (read-only memory, ROM), erasable programmable read-only memory (erasable programmable read-only memory, EPROM) or Portable read-only memory (compact disc read-only memory, CD-ROM), the memory 5120 is used to store program codes executed by the terminal device 5100 and transmitted data.
- random access memory random access memory
- ROM read-only memory
- erasable programmable read-only memory erasable programmable read-only memory, EPROM
- Portable read-only memory compact disc read-only memory
- the terminal device 5100 also includes a communication interface for receiving and sending data.
- the processor 5110 may be one or more CPUs. When the processor 5110 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.
- the processor 5110 in the terminal device 5100 is configured to execute the computer program or instruction 5121 stored in the memory 5120, and perform the following operations: receive indication information, the indication information is used to indicate K i , and K i is the repetition of Msg1 corresponding to the SSB index i The number of times, wherein, the SSB identified by the SSB index i is the SSB in the first cell, 1 ⁇ i ⁇ M, i is a positive integer, and M is the total number of SSBs in the first cell. According to K i , send a random access request message.
- the network device can indicate to the terminal device the number of repetitions of the random access request message corresponding to the SSB index through the indication information, the terminal device 5100 can select a certain SSB according to the The number of repetitions of the random access request message corresponding to the SSB index of the SSB, the random access request message is sent multiple times, which helps to achieve coverage enhancement, improve the transmission reliability of the random access request message, and improve the random access of terminal equipment probability of success.
- each operation can use the corresponding description of the above-mentioned method embodiments, and the terminal device 5100 can be used to execute the method on the terminal device side of the above-mentioned method embodiments of the present application, which will not be described in detail here.
- FIG. 52 is a schematic structural diagram of a network device according to an embodiment of the present application.
- the network device 5200 includes a processor 5210 , a memory 5220 and a communication bus for connecting the processor 5210 and the memory 5220 .
- the memory 5220 includes but not limited to RAM, ROM, EPROM or CD-ROM, and the memory 5220 is used to store related instructions and data.
- Network device 5200 also includes a communication interface for receiving and sending data.
- the processor 5210 may be one or more CPUs. When the processor 5210 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.
- the processor 5210 in the network device 5200 is configured to execute the computer program stored in the memory 5220 or the instruction 5221 to perform the following operations: send indication information, the indication information is used to indicate K i , and K i is the synchronization signal block SSB index in the first cell
- the number of repetitions of the random access request message corresponding to i, 1 ⁇ i ⁇ M, M is the total number of SSBs in the first cell, and K i is a positive integer greater than or equal to 1.
- the embodiment of the present application in order to enhance the coverage under the communication system, introduces the number of repetitions of the random access request message, and configures the random access request message corresponding to the SSB index through the indication information The number of repetitions of the random access request message, so that according to the number of repetitions of the random access request message, the random access request message is sent to achieve coverage enhancement, which is conducive to improving the transmission reliability of the random access request message and improving the possibility of successful random access of the terminal device sex.
- each operation can use the corresponding description of the above-mentioned method embodiments, and the network device 5200 can be used to execute the method on the network device side of the above-mentioned method embodiments of the present application, which will not be described in detail here.
- An embodiment of the present application also provides a chip, including a processor, a memory, and a computer program or instruction stored on the memory, wherein the processor executes the computer program or instruction to implement the steps described in the above method embodiments.
- the embodiment of the present application also provides a chip module, including a transceiver component and a chip.
- the chip includes a processor, a memory, and a computer program or instruction stored on the memory, wherein the processor executes the computer program or instruction to The steps described in the above method embodiments are implemented.
- the embodiment of the present application also provides a computer-readable storage medium, which stores a computer program or instruction, and when the computer program or instruction is executed, implements the steps described in the above method embodiments.
- the embodiment of the present application also provides a computer program product, including a computer program or an instruction.
- a computer program product including a computer program or an instruction.
- the steps of the methods or algorithms described in the embodiments of the present application may be implemented in the form of hardware, or may be implemented in the form of a processor executing software instructions.
- Software instructions can be composed of corresponding software modules, and software modules can be stored in RAM, flash memory, ROM, erasable programmable read-only memory (erasable programmable ROM, EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), registers, hard disk, removable hard disk, compact disc read-only (CD-ROM), or any other form of storage medium known in the art.
- An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
- the storage medium may also be a component of the processor.
- the processor and storage medium can be located in the ASIC.
- the ASIC can be located in the terminal device or the management device.
- the processor and the storage medium may also exist in the terminal device or the management device as discrete components.
- the functions described in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
- software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
- the computer program product includes one or more computer instructions.
- the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
- the computer instructions may be stored in, or transmitted from, one computer-readable storage medium to another computer-readable storage medium.
- the computer instructions can be sent from a website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) Transmission to another website site, computer, server or data center.
- the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
- the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disk, SSD)) wait.
- a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
- an optical medium for example, a digital video disc (digital video disc, DVD)
- a semiconductor medium for example, a solid state disk (solid state disk, SSD)
- the modules/units included in the devices and products described in the above embodiments may be software modules/units, hardware modules/units, or partly software modules/units and partly hardware modules/units.
- each module/unit contained in it may be implemented by hardware such as a circuit, or at least part of the module
- the block/unit can be realized by means of a software program, the software program runs on the processor integrated in the chip, and the remaining (if any) part of the modules/units can be realized by hardware such as circuits;
- Each of the devices and products, each module/unit contained in it may be realized by hardware such as a circuit, and different modules/units may be located in the same component (such as a chip, a circuit module, etc.) or in different components of the chip module, or , at least part of the modules/units can be realized by means of a software program, the software program runs on the processor integrated in the chip module, and the remaining (if any) parts of the modules/units can be realized by
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Abstract
Disclosed in the present application are a communication method and apparatus, a terminal device and a network device. The method comprises: the network device sending indication information which is used for indicating Ki, wherein Ki is the number of repetitions of a random access request message corresponding to an SSB index i in a first cell, 1≤i≤M, M being the total number of SSBs in the first cell, and Ki being a positive integer greater than or equal to 1; the terminal device receiving the indication information; and the terminal device sending the random access request message according to Ki, the SSB indicated by the SSB index i being the SSB selected by the terminal device from the monitored SSBs. Therefore, according to the present application, the number of repetitions of the random access request message corresponding to the SSB index can be indicated by means of the indication information, and the random access request message is sent according to the number of repetitions of the random access request message to achieve coverage enhancement, thereby helping to improve the transmission reliability of the random access request message and improve the possibility of successful random access of the terminal device.
Description
本申请涉及通信技术领域,尤其涉及一种通信方法与装置、终端设备和网络设备。The present application relates to the technical field of communication, and in particular to a communication method and device, terminal equipment and network equipment.
相比于陆地网络通信***,非地面网络(non-terrestrial network,NTN)通信***存在更大的传播时延,因此陆地通信***中的通信方式不再适用于NTN通信***。Compared with the terrestrial network communication system, the non-terrestrial network (NTN) communication system has a larger propagation delay, so the communication method in the terrestrial communication system is no longer applicable to the NTN communication system.
在NTN通信***中,第三代合作伙伴计划组织(3rd generation partnership project,3GPP)标准通常假设终端设备的天线增益为0dBi,但在实际通信过程中,终端设备的天线增益往往达不到上述要求。由于终端设备的天线增益无法满足要求,因此在终端设备进行随机接入时,网络设备可能无法成功接收终端设备所发送的随机接入请求消息(如消息1或Msg1)。In the NTN communication system, the third generation partnership project (3rd generation partnership project, 3GPP) standard usually assumes that the antenna gain of the terminal equipment is 0dBi, but in the actual communication process, the antenna gain of the terminal equipment often cannot meet the above requirements . Since the antenna gain of the terminal device cannot meet the requirement, when the terminal device performs random access, the network device may not successfully receive the random access request message (such as message 1 or Msg1 ) sent by the terminal device.
发明内容Contents of the invention
本申请提供了一种通信方法与装置、终端设备和网络设备,以期望实现覆盖增强,提高随机接入请求消息的传输可靠性,以及提升终端设备随机接入成功的可能性。The present application provides a communication method and device, terminal equipment, and network equipment, in order to achieve coverage enhancement, improve transmission reliability of random access request messages, and increase the possibility of successful random access of terminal equipment.
第一方面,为本申请的一种通信方法,应用于终端设备之中;所述方法包括:The first aspect is a communication method of the present application, which is applied to a terminal device; the method includes:
接收指示信息,所述指示信息用于指示Ki,所述Ki为第一小区中的同步信号块SSB索引i对应的随机接入请求消息的重复次数,1≤i≤M,所述M为所述第一小区中SSB的总个数,所述Ki为大于或等于1的正整数;receiving indication information, where the indication information is used to indicate K i , where K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1≤i≤M, and the M is the total number of SSBs in the first cell, and the K i is a positive integer greater than or equal to 1;
根据所述Ki,发送随机接入请求消息,所述SSB索引i指示的SSB为所述终端设备从监听到的SSB中选择的SSB。According to the K i , a random access request message is sent, and the SSB indicated by the SSB index i is the SSB selected by the terminal device from the monitored SSBs.
本申请实施例中通过引入指示信息,使得网络设备可以通过指示信息向终端设备指示为SSB索引或SSB配置的的随机接入请求消息的重复次数,然后终端设备可以根据选择的SSB对应的随机接入请求消息的重复次数,向网络设备多次发送随机接入请求消息,因而有助于实现覆盖增强,提高随机接入请求消息的传输可靠性,以及提升终端设备随机接入成功的可能性。In this embodiment of the present application, the instruction information is introduced so that the network device can indicate to the terminal device the number of repetitions of the random access request message configured for the SSB index or SSB through the instruction information, and then the terminal device can perform random access according to the selected SSB. The random access request message is sent multiple times to the network device according to the number of repetitions of the incoming request message, which helps to achieve coverage enhancement, improve the transmission reliability of the random access request message, and increase the possibility of successful random access of the terminal device.
在一些可能的实现中,第一小区为终端设备的服务小区。例如,对于处于连接态、空闲态或非激活态的终端设备来说,第一小区为终端设备的服务小区。或者,第一小区为终端设备驻留的小区。例如,对于初始接入网络的终端设备,第一小区为终端设备驻留的小区。需要说明的是,在本申请实施例中,终端设备初始接入网络,终端驻留的小区也可以理解为终端设备的服务小区。In some possible implementations, the first cell is a serving cell of the terminal device. For example, for a terminal device in a connected state, an idle state or an inactive state, the first cell is a serving cell of the terminal device. Alternatively, the first cell is a cell where the terminal equipment resides. For example, for a terminal device that initially accesses the network, the first cell is the cell where the terminal device resides. It should be noted that, in the embodiment of the present application, the terminal device initially accesses the network, and the cell where the terminal resides may also be understood as the serving cell of the terminal device.
第二方面,为本申请的一种通信方法,应用于网络设备之中;所述方法包括:The second aspect is a communication method of the present application, which is applied to a network device; the method includes:
发送指示信息,所述指示信息用于指示Ki,所述Ki为第一小区中的同步信号块SSB索引i对应的随机接入请求消息的重复次数,1≤i≤M,所述M为所述第一小区中SSB的总个数,所述Ki为大于或等于1的正整数。sending indication information, where the indication information is used to indicate K i , where K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1≤i≤M, and the M is the total number of SSBs in the first cell, and the K i is a positive integer greater than or equal to 1.
第三方面,为本申请的一种通信装置,其中,包括:The third aspect is a communication device of the present application, which includes:
接收单元,用于接收指示信息,所述指示信息用于指示Ki,所述Ki为第一小区中的同步信号块SSB索引i对应的随机接入请求消息的重复次数,1≤i≤M,所述M为所述第一小区中SSB的总个数,所述Ki为大于或等于1的正整数;A receiving unit, configured to receive indication information, where the indication information is used to indicate K i , where K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1≤i≤ M, where M is the total number of SSBs in the first cell, and K i is a positive integer greater than or equal to 1;
发送单元,用于根据所述Ki,发送随机接入请求消息,所述SSB索引i指示的SSB为所述终端设备从监听到的SSB中选择的SSB。A sending unit, configured to send a random access request message according to the K i , where the SSB indicated by the SSB index i is the SSB selected by the terminal device from the monitored SSBs.
第四方面,为本申请的一种通信装置,其中,包括:The fourth aspect is a communication device of the present application, which includes:
发送单元,用于发送指示信息,所述指示信息用于指示Ki,所述Ki为第一小区中的同步信号块SSB索引i对应的随机接入请求消息的重复次数,1≤i≤M,所述M为所述第一小区中SSB的总个数,所述Ki为大于或等于1的正整数。A sending unit, configured to send indication information, where the indication information is used to indicate K i , where K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1≤i≤ M, where M is the total number of SSBs in the first cell, and K i is a positive integer greater than or equal to 1.
第五方面,为本申请的一种终端设备,包括处理器、存储器及存储在所述存储器上的计算机程序或指令,其中,所述处理器执行所述计算机程序或指令以实现上述第一方面所设计的方法中的步骤。The fifth aspect is a terminal device of the present application, including a processor, a memory, and computer programs or instructions stored in the memory, wherein, the processor executes the computer program or instructions to realize the above first aspect steps in the designed method.
第六方面,为本申请的一种网络设备,包括处理器、存储器及存储在所述存储器上的计算机程序或指令,其中,所述处理器执行所述计算机程序或指令以实现上述第二方面所设计的方法中的步骤。The sixth aspect is a network device of the present application, including a processor, a memory, and a computer program or instruction stored on the memory, wherein the processor executes the computer program or instruction to realize the above-mentioned second aspect steps in the designed method.
第七方面,为本申请的一种芯片,包括处理器,其中,所述处理器执行上述第一方面或第二方面所设计的方法中的步骤。A seventh aspect is a chip of the present application, including a processor, wherein the processor executes the steps in the method designed in the above-mentioned first aspect or the second aspect.
第八方面,为本申请的一种芯片模组,包括收发组件和芯片,所述芯片包括处理器,其中,所述处
理器执行上述第一方面或第二方面所设计的方法中的步骤。The eighth aspect is a chip module of the present application, including a transceiver component and a chip, and the chip includes a processor, wherein the processor The processor executes the steps in the method designed in the first aspect or the second aspect above.
第九方面,为本申请的一种计算机可读存储介质,其中,所述计算机可读存储介质存储有计算机程序或指令,所述计算机程序或指令被执行时实现上述第一方面或第二方面所设计的方法中的步骤。The ninth aspect is a computer-readable storage medium of the present application, wherein the computer-readable storage medium stores computer programs or instructions, and when the computer programs or instructions are executed, the above-mentioned first or second aspect is realized steps in the designed method.
第十方面,为本申请的一种计算机程序产品,包括计算机程序或指令,其中,所述计算机程序或指令被执行时实现上述第一方面或第二方面所设计的方法中的步骤。示例性的,该计算机程序产品可以为一个软件安装包。The tenth aspect is a computer program product of the present application, including computer programs or instructions, wherein when the computer programs or instructions are executed, the steps in the method designed in the first aspect or the second aspect above are realized. Exemplarily, the computer program product may be a software installation package.
第二方面至第十方面的技术方案所带来的有益效果可以参见第一方面的技术方案所带来的技术效果,此处不再赘述。For the beneficial effects brought by the technical solutions of the second aspect to the tenth aspect, please refer to the technical effects brought by the technical solution of the first aspect, which will not be repeated here.
为了更清楚地说明本申请实施例中的技术方案,下面将对本申请实施例中所需要使用的附图作简单地介绍。In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the embodiments of the present application.
图1是本申请实施例的一种无线通信***的架构示意图;FIG. 1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present application;
图2是本申请实施例的一种具有透明卫星通信***的架构示意图;FIG. 2 is a schematic diagram of the architecture of a transparent satellite communication system according to an embodiment of the present application;
图3是本申请实施例的一种卫星在地面上产生的波束的结构示意图;3 is a schematic structural diagram of a beam generated by a satellite on the ground according to an embodiment of the present application;
图4是本申请实施例的一种陆地网通信***与NTN通信***之间比较信号接收质量的结构示意图;4 is a schematic structural diagram of comparing signal reception quality between a land network communication system and an NTN communication system according to an embodiment of the present application;
图5是本申请实施例的一种NTN通信***的架构比较的架构示意图;Fig. 5 is the architectural diagram of the architecture comparison of a kind of NTN communication system of the embodiment of the present application;
图6是本申请实施例的一种4步随机接入的流程示意图;FIG. 6 is a schematic flow diagram of a 4-step random access according to an embodiment of the present application;
图7是本申请实施例的一种2步随机接入的流程示意图;FIG. 7 is a schematic flow diagram of a two-step random access according to an embodiment of the present application;
图8至图10是本申请实施例的一种SSB与RO之间的映射关系的示意图;8 to 10 are schematic diagrams of a mapping relationship between an SSB and an RO according to an embodiment of the present application;
图11是本申请实施例的一种向SSB索引配置Msg1的重复次数的场景示意图;FIG. 11 is a schematic diagram of a scenario of configuring the number of repetitions of Msg1 to the SSB index according to an embodiment of the present application;
图12至图31是本申请实施例的又一种SSB与RO之间的映射关系的示意图;FIG. 12 to FIG. 31 are schematic diagrams of another mapping relationship between SSB and RO according to the embodiment of the present application;
图32是本申请实施例的又一种向SSB索引配置Msg1的重复次数的场景示意图;Fig. 32 is a schematic diagram of another scenario of configuring the number of repetitions of Msg1 to the SSB index according to the embodiment of the present application;
图33至图36是本申请实施例的又一种SSB与RO之间的映射关系的示意图;FIG. 33 to FIG. 36 are schematic diagrams of another mapping relationship between SSB and RO according to the embodiment of the present application;
图37是本申请实施例的又一种向SSB索引配置Msg1的重复次数的场景示意图;FIG. 37 is a schematic diagram of another scenario of configuring the number of repetitions of Msg1 to the SSB index according to the embodiment of the present application;
图38至图47是本申请实施例的又一种SSB与RO之间的映射关系的示意图;FIG. 38 to FIG. 47 are schematic diagrams of another mapping relationship between SSB and RO according to the embodiment of the present application;
图48是本申请实施例的一种通信方法的流程示意图;FIG. 48 is a schematic flowchart of a communication method according to an embodiment of the present application;
图49是本申请实施例的一种通信装置的功能单元组成框图;FIG. 49 is a block diagram of functional units of a communication device according to an embodiment of the present application;
图50是本申请实施例的又一种通信装置的功能单元组成框图;FIG. 50 is a block diagram of functional units of another communication device according to an embodiment of the present application;
图51是本申请实施例的一种终端设备的结构示意图;FIG. 51 is a schematic structural diagram of a terminal device according to an embodiment of the present application;
图52是本申请实施例的一种网络设备的结构示意图。Fig. 52 is a schematic structural diagram of a network device according to an embodiment of the present application.
应理解,本申请实施例中涉及的术语“第一”、“第二”等是用于区别不同对象,而不是用于描述特定顺序。此外,术语“包括”和“具有”以及它们任何变形,意图在于覆盖不排他的包含。例如,包含了一系列步骤或单元的过程、方法、软件、产品或设备没有限定于已列出的步骤或单元,而是还包括没有列出的步骤或单元,或还包括对于这些过程、方法、产品或设备固有的其他步骤或单元。It should be understood that the terms "first", "second" and the like involved in the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, software, product, or device that includes a series of steps or units is not limited to the listed steps or units, but also includes steps or units that are not listed, or includes , other steps or units inherent in the product or equipment.
本申请实施例中涉及的“实施例”意味着,结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例,也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是,本文所描述的实施例可以与其它实施例相结合。The "embodiments" referred to in the embodiments of the present application means that specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.
本申请实施例中的“至少一个”,指的是一个或多个,多个指的是两个或两个以上。"At least one" in the embodiments of the present application refers to one or more, and multiple refers to two or more.
本申请实施例中的“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示如下三种情况:单独存在A,同时存在A和B,单独存在B。其中,A、B可以是单数或者复数。字符“/”可以表示前后关联对象是一种“或”的关系。另外,符号“/”也可以表示除号,即执行除法运算。"And/or" in the embodiment of this application describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which may indicate the following three situations: A exists alone, and A and B exist simultaneously , B exists alone. Wherein, A and B may be singular or plural. The character "/" can indicate that the contextual objects are an "or" relationship. In addition, the symbol "/" can also represent a division sign, that is, to perform a division operation.
本申请实施例中的“以下至少一项(个)”或其类似表达,指的是这些项中的任意组合,包括单项(个)或复数项(个)的任意组合。例如,a、b或c中的至少一项(个),可以表示如下七种情况:a,b,c,a和b,a和c,b和c,a、b和c。其中,a、b、c中的每一个可以是元素,也可以是包含一个或多个元素的集合。"At least one of the following" or similar expressions in the embodiments of the present application refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one item (piece) of a, b or c can represent the following seven situations: a, b, c, a and b, a and c, b and c, a, b and c. Wherein, each of a, b, and c may be an element, or a set containing one or more elements.
本申请实施例中涉及“的(of)”、“相应的(corresponding,relevant)”、“对应的(corresponding)”、“关联
的(associated,related)”、“映射的(mapped)”有时可以混用。应当指出的是,在不强调区别时,所要表达的概念或含义是一致的。The embodiments of the present application refer to "of", "corresponding, relevant", "corresponding", and "associated "(associated, related)" and "mapped" can sometimes be used interchangeably. It should be noted that when the distinction is not emphasized, the concepts or meanings to be expressed are consistent.
本申请实施例中的“网络”可以与“***”等表达为同一概念,通信***即为通信网络。"Network" in the embodiments of the present application may be expressed as the same concept as "system", and a communication system is a communication network.
本申请实施例中的“连接”是指直接连接或者间接连接等各种连接方式,以实现设备间的通信,对此不做具体限定。The "connection" in the embodiments of the present application refers to various connection modes such as direct connection or indirect connection, so as to realize communication between devices, which is not specifically limited.
下面对本申请实施例的技术方案所涉及的相关内容进行具体介绍。The relevant content involved in the technical solutions of the embodiments of the present application will be specifically introduced below.
1、无线通信***、终端设备、卫星、非地面网络网关和网络设备1. Wireless communication systems, terminal equipment, satellites, non-terrestrial network gateways and network equipment
1)无线通信***1) Wireless communication system
本申请实施例的技术方案可以应用于各种无线通信***,例如:长期演进(Long Term Evolution,LTE)***、先进的长期演进(Advanced Long Term Evolution,LTE-A)***、新无线(New Radio,NR)***、NR***的演进***、非授权频谱上的LTE(LTE-based Access to Unlicensed Spectrum,LTE-U)***、非授权频谱上的NR(NR-based Access to Unlicensed Spectrum,NR-U)***、非地面通信网络(Non-Terrestrial Networks,NTN)***、通用移动通信***(Universal Mobile Telecommunication System,UMTS)、无线局域网(Wireless Local Area Networks,WLAN)、无线保真(Wireless Fidelity,WiFi)、第6代(6th-Generation,6G)通信***或者其他通信***等。The technical solution of the embodiment of the present application can be applied to various wireless communication systems, such as: Long Term Evolution (Long Term Evolution, LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (New Radio , NR) system, evolution system of NR system, LTE (LTE-based Access to Unlicensed Spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based Access to Unlicensed Spectrum, NR-U) system on unlicensed spectrum ) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunications System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi) , 6th generation (6th-Generation, 6G) communication system or other communication systems, etc.
传统的无线通信***所支持的连接数有限,且易于实现。随着通信技术的发展,无线通信***不仅可以支持传统的无线通信***,还可以支持如设备到设备(device to device,D2D)通信、机器到机器(machine to machine,M2M)通信、机器类型通信(machine type communication,MTC)、车辆间(vehicle to vehicle,V2V)通信、车联网(vehicle to everything,V2X)通信、窄带物联网(narrow band internet of things,NB-IoT)通信等。本申请实施例的技术方案也可以应用于上述无线通信***、或者,上述传统的无线通信***。The number of connections supported by traditional wireless communication systems is limited and easy to implement. With the development of communication technology, the wireless communication system can not only support the traditional wireless communication system, but also support such as device to device (device to device, D2D) communication, machine to machine (machine to machine, M2M) communication, machine type communication (machine type communication, MTC), inter-vehicle (vehicle to vehicle, V2V) communication, vehicle networking (vehicle to everything, V2X) communication, narrow band Internet of things (narrow band internet of things, NB-IoT) communication, etc. The technical solutions of the embodiments of the present application may also be applied to the foregoing wireless communication system, or the foregoing traditional wireless communication system.
示例的,本申请实施例可以应用于波束赋形(beamforming)、载波聚合(carrier aggregation,CA)、双连接(dual connectivity,DC)或者独立(standalone,SA)部署场景等。Exemplarily, the embodiments of the present application may be applied to beamforming (beamforming), carrier aggregation (carrier aggregation, CA), dual connectivity (dual connectivity, DC) or independent (standalone, SA) deployment scenarios, and the like.
或者,又示例的,本申请实施例可以应用于非授权频谱的通信场景。其中,在本申请实施例中,非授权频谱也可以认为是共享频谱。或者,本申请实施例也可以应用于授权频谱。其中,授权频谱也可以认为是非共享频谱。Or, as another example, the embodiments of the present application may be applied to a communication scenario of an unlicensed spectrum. Wherein, in the embodiment of the present application, the unlicensed spectrum may also be regarded as the shared spectrum. Alternatively, the embodiments of the present application may also be applied to licensed spectrum. Wherein, the licensed spectrum can also be regarded as a non-shared spectrum.
在一些实施例中,本申请实施例的技术方案可以应用于NTN通信***,例如,卫星通信***。对于卫星通信***而言,通常网络设备是通过卫星实现与地面终端设备通信的。In some embodiments, the technical solutions of the embodiments of the present application may be applied to an NTN communication system, for example, a satellite communication system. For satellite communication systems, usually network equipment communicates with ground terminal equipment through satellites.
示例性的,本申请实施例的一种NTN通信***,如图1所示。NTN通信***10可以包括终端设备110、参考点(reference point)120、卫星130、非地面网络网关(NTN gateway)140和网络设备150。其中,终端设备110、非地面网络网关140和网络设备150可以位于地球表面,而卫星130位于地球轨道。卫星130可以向信号覆盖的地理区域提供通信服务,并且可以与位于信号覆盖区域内的终端设备110进行通信。Exemplarily, an NTN communication system according to an embodiment of the present application is shown in FIG. 1 . The NTN communication system 10 may include a terminal device 110 , a reference point (reference point) 120 , a satellite 130 , a non-terrestrial network gateway (NTN gateway) 140 and a network device 150 . Wherein, the terminal device 110 , the non-terrestrial network gateway 140 and the network device 150 may be located on the earth's surface, while the satellite 130 is located in the earth's orbit. The satellite 130 can provide communication services to the geographical area covered by the signal, and can communicate with the terminal device 110 located in the signal coverage area.
其中,终端设备110位于某个小区或波束内,并且该小区包括一个参考点120。此外,终端设备110与卫星130之间的无线通信链路称为服务链路(service link)。卫星130与非地面网络网关140之间的无线通信链路称为供给链路(feeder link)。Wherein, the terminal device 110 is located in a certain cell or beam, and the cell includes a reference point 120 . In addition, the wireless communication link between the terminal device 110 and the satellite 130 is called a service link. The wireless communication link between the satellite 130 and the non-terrestrial network gateway 140 is called a feeder link.
需要说明的是,非地面网络网关140与网络设备150可以集成到同一个设备,也可以分别为独立的设备,对此不作具体限制。It should be noted that the non-terrestrial network gateway 140 and the network device 150 may be integrated into the same device, or may be independent devices, which is not specifically limited.
2)终端设备2) Terminal equipment
本申请实施例中,终端设备可以为一种具有收发功能的设备,又可以称之为用户设备(user equipment,UE)、远程终端设备(remote UE)、中继设备(relay UE)、接入终端设备、用户单元、用户站、移动站、移动台、远方站、移动设备、用户终端设备、智能终端设备、无线通信设备、用户代理或用户装置。需要说明的是,中继设备是能够为其他终端设备(包括远程终端设备)提供中继转发服务的终端设备。In the embodiment of the present application, the terminal equipment may be a device with transceiver function, and may also be called user equipment (user equipment, UE), remote terminal equipment (remote UE), relay equipment (relay UE), access Terminal equipment, subscriber unit, subscriber station, mobile station, mobile station, remote station, mobile equipment, subscriber terminal equipment, intelligent terminal equipment, wireless communication equipment, user agent or user device. It should be noted that a relay device is a terminal device capable of providing relay and forwarding services for other terminal devices (including remote terminal devices).
另外,终端设备还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol,SIP)电话、无线本地环路(wireless local loop,WLL)站、个人数字助理(personal digital assistant,PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、下一代通信***(例如NR通信***、6G通信***)中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network,PLMN)中的终端设备等,对此不作具体限定。In addition, the terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), with Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in next-generation communication systems (such as NR communication systems, 6G communication systems), or public land for future evolution Terminal equipment in a mobile communication network (public land mobile network, PLMN), etc., is not specifically limited.
本申请实施例中,终端设备可以部署在陆地上,包括室内或室外、手持、穿戴或车载;可以部署在水面上(如轮船等);可以部署在空中(如飞机、气球和卫星等)。
In this embodiment of the application, terminal devices can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can be deployed on water (such as ships, etc.); can be deployed in the air (such as aircraft, balloons and satellites, etc.).
本申请实施例中,终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality,VR)终端设备、增强现实(augmented reality,AR)终端设备、工业控制(industrial control)中的无线终端设备、无人自动驾驶中的无线终端设备、远程医疗(remote medical)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备或者智慧家庭(smart home)中的无线终端设备等。In the embodiment of the present application, the terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device , wireless terminal equipment in industrial control, wireless terminal equipment in unmanned automatic driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation safety ( Wireless terminal equipment in transportation safety, wireless terminal equipment in smart city (smart city) or wireless terminal equipment in smart home (smart home), etc.
本申请实施例中,终端设备可以包括无线通信功能的装置,例如芯片***、芯片、芯片模组。示例的,该芯片***可以包括芯片,还可以包括其它分立器件。In the embodiment of the present application, the terminal device may include an apparatus with a wireless communication function, such as a chip system, a chip, or a chip module. Exemplarily, the chip system may include a chip, and may also include other discrete devices.
3)卫星3) Satellite
本申请实施例中,卫星可以是载有透明有效载荷(transparent payload)(或称为弯管有效载荷(bent pipe payload))或再生有效载荷(regenerative payload)信号发射机的航天器,也就是透明卫星(Transparent satellite)或再生卫星(Regenerative satellite)。In the embodiment of the present application, the satellite may be a spacecraft carrying a transparent payload (or called a bent pipe payload) or a regenerative payload signal transmitter, that is, a transparent payload. Satellite (Transparent satellite) or regenerative satellite (Regenerative satellite).
具体的,卫星按照运行轨道高度的不同可以分为近地轨道(low earth orbit,LEO)卫星、中地轨道(medium earth orbit,MEO)卫星、同步地球轨道(geostationary earth orbit,GEO)卫星以及高椭圆轨道(high elliptical orbit,HEO)卫星等。示例的,LEO卫星的运行轨道高度位于300km至1500km之间。MEO卫星的运行轨道高度位于7000km至25000km之间。GEO卫星的运行轨道高度位为35786km。HEO卫星的运行轨道高度位于400km至50000km之间。Specifically, satellites can be divided into low earth orbit (LEO) satellites, medium earth orbit (MEO) satellites, geostationary earth orbit (GEO) satellites and high Elliptical orbit (high elliptical orbit, HEO) satellites, etc. Exemplarily, the operating orbit altitude of the LEO satellite is between 300km and 1500km. The orbital altitude of MEO satellites is between 7000km and 25000km. The orbital altitude of GEO satellites is 35786km. The orbital altitude of HEO satellites is between 400km and 50,000km.
4)非地面网络网关4) Non-terrestrial network gateway
本申请实施例中,非地面网络网关可以是位于地面的地球站或网关,能够提供足够的无线射频(radio frequency,RF)功率和RF灵敏度,用以实现地面设备(如网络设备)与卫星的连接。非地面网络网关是传输网络层(transport network layer,TNL)的节点。In the embodiment of this application, the non-terrestrial network gateway can be an earth station or gateway located on the ground, which can provide sufficient radio frequency (radio frequency, RF) power and RF sensitivity to realize the communication between ground equipment (such as network equipment) and satellites. connect. The non-terrestrial network gateway is a node of the transport network layer (TNL).
5)网络设备5) Network equipment
本申请实施例中,网络设备为一种具有收发功能的设备,用于与终端设备之间进行通信。例如,网络设备可以负责空口侧的无线资源管理(radio resource management,RRM)、服务质量(quality of service,QoS)管理、数据压缩和加密、数据收发等。其中,网络设备可以是通信***中的基站(base station,BS)或者部署于无线接入网(radio access network,RAN)用于提供无线通信功能的设备。例如,LTE通信***中的演进型节点B(evolutional node B,eNB或eNodeB)、NR通信***中的下一代演进型的节点B(next generation evolved node B,ng-eNB)、NR通信***中的下一代节点B(next generation node B,gNB)、双连接架构中的主节点(master node,MN)、双连接架构中的第二节点或辅节点(secondary node,SN)等,对此不作具体限制。In the embodiment of the present application, the network device is a device having a sending and receiving function, and is used for communicating with a terminal device. For example, the network device may be responsible for radio resource management (radio resource management, RRM), quality of service (quality of service, QoS) management, data compression and encryption, data sending and receiving, etc. on the air interface side. Wherein, the network device may be a base station (base station, BS) in a communication system or a device deployed in a radio access network (radio access network, RAN) to provide a wireless communication function. For example, the evolved node B (evolutional node B, eNB or eNodeB) in the LTE communication system, the next generation evolved node B (next generation evolved node B, ng-eNB) in the NR communication system, and the The next generation node B (next generation node B, gNB), the master node (master node, MN) in the dual connection architecture, the second node or the secondary node (secondary node, SN) in the dual connection architecture, etc., will not be specified. limit.
本申请实施例中,网络设备还可以是核心网(core network,CN)中的设备,如访问和移动性管理功能(access and mobility management function,AMF)、用户面功能(user plane function,UPF)等;还可以是无线局域网(wireless local area network,WLAN)中的接入点(access point,AP)、中继站、未来演进的PLMN网络中的通信设备、NTN网络中的通信设备等。In the embodiment of the present application, the network device can also be a device in the core network (core network, CN), such as access and mobility management function (access and mobility management function, AMF), user plane function (user plane function, UPF) etc.; it can also be an access point (access point, AP) in a wireless local area network (wireless local area network, WLAN), a relay station, a communication device in a future evolved PLMN network, a communication device in an NTN network, etc.
本申请实施例中,网络设备可以包括具有为终端设备提供无线通信功能的装置,例如芯片***、芯片、芯片模组。示例的,该芯片***可以包括芯片,或者,可以包括其它分立器件。In the embodiment of the present application, the network device may include an apparatus that provides a wireless communication function for the terminal device, such as a chip system, a chip, or a chip module. Exemplarily, the chip system may include a chip, or may include other discrete devices.
本申请实施例中,网络设备可以与互联网协议(Internet Protocol,IP)网络进行通信。例如,因特网(internet)、私有的IP网或者其他数据网等。In the embodiment of the present application, the network device may communicate with an Internet Protocol (Internet Protocol, IP) network. For example, the Internet (internet), a private IP network or other data networks and the like.
在一些可能的网络部署中,网络设备可以是一个独立的节点以实现上述基站的功能或者,网络设备可以包括两个或多个独立的节点以实现上述基站的功能。例如,网络设备包括集中式单元(centralized unit,CU)和分布式单元(distributed unit,DU),如gNB-CU和gNB-DU。进一步的,在本申请的另一些实施例中,网络设备还可以包括有源天线单元(active antenna unit,AAU)。其中,CU实现网络设备的一部分功能,DU实现网络设备的另一部分功能。比如,CU负责处理非实时协议和服务,实现无线资源控制(radio resource control,RRC)层、服务数据适配(service data adaptation protocol,SDAP)层、分组数据汇聚(packet data convergence protocol,PDCP)层的功能。DU负责处理物理层协议和实时服务,实现无线链路控制(radio link control,RLC)层、媒体接入控制(medium access control,MAC)层和物理(physical,PHY)层的功能。另外,AAU可以实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息,或者由PHY层的信息转变而来,因此,在该网络部署下,高层信令(如RRC信令)可以认为是由DU发送的,或者由DU和AAU共同发送的。可以理解的是,网络设备可以包括CU、DU、AAU中的至少一个。另外,可以将CU划分为RAN中的网络设备,或者,也可以将CU划分为核心网中的网络设备,对此不做具体限定。
In some possible network deployments, the network device may be an independent node to implement the functions of the base station, or the network device may include two or more independent nodes to implement the functions of the base station. For example, the network device includes a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU), such as gNB-CU and gNB-DU. Furthermore, in some other embodiments of the present application, the network device may further include an active antenna unit (active antenna unit, AAU). Among them, the CU implements a part of the functions of the network equipment, and the DU implements another part of the functions of the network equipment. For example, the CU is responsible for processing non-real-time protocols and services, implementing the radio resource control (radio resource control, RRC) layer, service data adaptation protocol (service data adaptation protocol, SDAP) layer, and packet data convergence (packet data convergence protocol, PDCP) layer function. The DU is responsible for processing physical layer protocols and real-time services, and realizes functions of a radio link control (radio link control, RLC) layer, a medium access control (medium access control, MAC) layer, and a physical (physical, PHY) layer. In addition, the AAU can implement some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this network deployment, high-level signaling (such as RRC signaling) can be considered to be sent by the DU, or Sent jointly by DU and AAU. It can be understood that the network device may include at least one of CU, DU, and AAU. In addition, the CU can be divided into network devices in the RAN, or the CU can also be divided into network devices in the core network, which is not specifically limited.
本申请实施例中,网络设备可以为小区提供服务,而该小区中的终端设备可以通过传输资源(如频谱资源)与网络设备进行通信。其中,该小区可以为宏小区(macro cell)、小小区(small cell)、城市小区(metro cell)、微小区(micro cell)、微微小区(pico cell)和毫微微小区(femto cell)等。In the embodiment of the present application, the network device can provide services for a cell, and the terminal devices in the cell can communicate with the network device through transmission resources (such as spectrum resources). Wherein, the cell may be a macro cell, a small cell, a metro cell, a micro cell, a pico cell, a femto cell, and the like.
6)示例性说明6) Exemplary instructions
示例性的,本申请实施例中采用透明卫星(transparent satellite)通信***。其中,透明卫星(Transparent satellite)通信***采用透明有效载荷。透明卫星通信***架构的示意图如图2所示。其中,终端设备、非地面网络网关和gNB位于地球表面,卫星位于地球轨道。卫星、非地面网络网关和gNB组成无线接入网(NG-radio access network,NG-RAN)。NG-RAN通过NG接口连接5G核心网。Exemplarily, a transparent satellite (transparent satellite) communication system is adopted in the embodiment of the present application. Among them, the transparent satellite (Transparent satellite) communication system adopts transparent payload. The schematic diagram of the transparent satellite communication system architecture is shown in Fig. 2 . Among them, the terminal equipment, non-terrestrial network gateway and gNB are located on the earth's surface, and the satellite is located in the earth's orbit. Satellites, non-terrestrial network gateways and gNBs form a radio access network (NG-radio access network, NG-RAN). NG-RAN is connected to the 5G core network through the NG interface.
2、NTN通信***2. NTN communication system
(1)NTN通信***和陆地网络通信***(1) NTN communication system and land network communication system
NTN通信***中,卫星通常会在给定服务区域内产生一个或多个波束(beam,或者称为beam footprint),而波束的形状通常为椭圆形,例如,相关描述可以参见3GPP标准。其中,部分卫星(例如LEO卫星)产生的波束也会随着该卫星在固定轨道上的运动而移动;或者,部分卫星(例如LEO卫星或者GEO卫星)在地面上产生的波束不会随着该卫星在固定轨道上的运动而移动。In the NTN communication system, satellites usually generate one or more beams (beams, or beam footprints) within a given service area, and the shape of the beams is usually elliptical. For example, related descriptions can refer to 3GPP standards. Among them, the beams generated by some satellites (such as LEO satellites) will also move with the movement of the satellite in a fixed orbit; or, the beams generated by some satellites (such as LEO satellites or GEO satellites) on the ground will not move with the movement of the satellite The movement of the satellite in a fixed orbit.
例如,如图3所示。在图3的(a)中,卫星(例如LEO卫星或者GEO卫星)产生的波束不会随着该卫星在固定轨道上的运动而移动。在图3的(b)中,卫星产生的波束会随着该卫星在固定轨道上的运动而移动。进一步的,在卫星与该卫星所产生的波束之间的相对距离是固定的情况下,路径损耗变化较小。For example, as shown in Figure 3. In (a) of FIG. 3 , the beam generated by a satellite (such as a LEO satellite or a GEO satellite) does not move as the satellite moves on a fixed orbit. In (b) of Fig. 3, the beam generated by the satellite will move as the satellite moves on the fixed orbit. Further, in the case where the relative distance between the satellite and the beam generated by the satellite is fixed, the variation of the path loss is small.
由于卫星相对于地面的距离非常远(例如,GEO卫星是35786km),因此在同一个波束或者小区的覆盖范围内,不同地理位置的终端设备(如UE)与卫星之间的传播距离差异较小(即同一个波束/小区的覆盖范围内不同地理位置的终端设备对应的信号的路径损耗差异较小),进而导致同一个波束的覆盖范围内,不同地理位置的终端设备对应的信号接收质量(包括终端设备的下行信号接收质量或者基站的上行信号接收质量)差异非常小,如图4的(b)所示。Since the distance between the satellite and the ground is very far (for example, the GEO satellite is 35786km), within the coverage of the same beam or cell, the difference in the propagation distance between the terminal equipment (such as UE) and the satellite in different geographic locations is small (that is, within the coverage of the same beam/cell, the difference in the path loss of signals corresponding to terminal devices in different geographic locations is small), which in turn leads to the reception quality of signals corresponding to terminal devices in different geographic locations within the coverage of the same beam ( The difference between the downlink signal reception quality of the terminal equipment or the uplink signal reception quality of the base station) is very small, as shown in (b) of FIG. 4 .
在图4的(a)所示的陆地网络通信***中,同一个波束/小区的覆盖范围内具有不同地理位置的终端设备4201和终端设备4202。In the land network communication system shown in (a) of FIG. 4 , there are terminal devices 4201 and 4202 with different geographic locations within the coverage of the same beam/cell.
由于网络设备410与终端设备4201之间的距离、和网络设备410与终端设备4202之间的距离之间存在较大差异,因此导致终端设备4201对应的信号接收质量与终端设备4202对应的信号接收质量之间存在较大差异。而在图4的(b)所示的NTN通信***中,同一个波束/小区的覆盖范围内具有不同地理位置的终端设备4401和终端设备4402。Since there is a large difference between the distance between the network device 410 and the terminal device 4201 and the distance between the network device 410 and the terminal device 4202, the signal reception quality corresponding to the terminal device 4201 is different from the signal reception quality corresponding to the terminal device 4202. There are large differences in quality. However, in the NTN communication system shown in (b) of FIG. 4 , there are terminal equipment 4401 and terminal equipment 4402 with different geographic locations within the coverage of the same beam/cell.
由于卫星430到地面的距离非常远,因此卫星430与终端设备4401之间的距离、和卫星430与终端设备4402之间的距离之间存在较小差异,从而导致终端设备4401对应的信号接收质量与终端设备4402对应的信号接收质量之间存在较小差异。Since the distance from the satellite 430 to the ground is very far, there is a small difference between the distance between the satellite 430 and the terminal device 4401 and the distance between the satellite 430 and the terminal device 4402, resulting in the corresponding signal reception quality of the terminal device 4401 There is a small difference between the quality of signal reception corresponding to terminal device 4402 .
(2)NTN通信***的架构(2) Architecture of NTN communication system
本申请实施例中NTN通信***的架构主要包括具有透明卫星(transparent satellite)的NTN通信架构(即采用透明有效载荷)和具有再生卫星(regenerative satellite)的NTN通信架构(即采用再生有效载荷),请参阅图5。其中,图5的(a)示例出具有透明卫星的NTN通信架构,而图5的(b)示例出具有再生卫星的NTN通信架构。The architecture of the NTN communication system in the embodiment of the present application mainly includes the NTN communication architecture with transparent satellite (transparent satellite) (i.e. adopts transparent payload) and the NTN communication architecture with regenerative satellite (regenerative satellite) (i.e. adopts regenerative payload), See Figure 5. Among them, (a) of FIG. 5 exemplifies the NTN communication architecture with transparent satellites, and FIG. 5 (b) exemplifies the NTN communication architecture with regenerative satellites.
在图5的(a)中,透明转发模式的卫星510产生至少一个波束520,并且该至少一个波束520可以形成一个小区。此时,位于该小区中的终端设备530可以测量到该小区的至少一个波束,并根据波束测量结果,从至少一个波束中选择一个波束,通过选择的波束与卫星510建立通信连接。In (a) of FIG. 5 , a satellite 510 in a transparent forwarding mode generates at least one beam 520, and the at least one beam 520 may form a cell. At this time, the terminal device 530 located in the cell can measure at least one beam of the cell, select one beam from the at least one beam according to the beam measurement result, and establish a communication connection with the satellite 510 through the selected beam.
在图5的(b)中,再生信号模式的卫星540产生至少一个波束550,并且该至少一个波束550可以形成一个小区。此时,位于该小区中的终端设备560可以测量到该小区的至少一个波束,并根据波束测量结果,从至少一个波束中选择一个波束,通过选择的波束与卫星540建立通信连接。In (b) of FIG. 5 , the satellite 540 of the regenerated signal pattern generates at least one beam 550, and the at least one beam 550 may form one cell. At this time, the terminal device 560 located in the cell can measure at least one beam of the cell, select one beam from the at least one beam according to the beam measurement result, and establish a communication connection with the satellite 540 through the selected beam.
3、随机接入过程3. Random access process
(1)4步随机接入(4-step random access)过程(1) 4-step random access (4-step random access) process
如图6所示,对于4步随机接入,整个过程包含4个步骤:随机接入请求消息的传输、随机接入响应(random access response,RAR)消息的传输、消息3(Msg3)的传输和消息4(Msg4)的传输。As shown in Figure 6, for 4-step random access, the whole process includes 4 steps: transmission of random access request message, transmission of random access response (random access response, RAR) message, transmission of message 3 (Msg3) and the transmission of message 4 (Msg4).
步骤一、随机接入请求消息的传输,即终端设备向网络设备发送随机接入请求消息。其中,随机接入请求消息,又可以称之为消息1(Msg1)。Step 1. Transmission of a random access request message, that is, the terminal device sends a random access request message to the network device. Wherein, the random access request message may also be called message 1 (Msg1).
具体地,随机接入请求消息可以包括随机接入前导码(random access preamble,RA preamble)。其中,RA preamble的主要作用可以是向网络设备请求接入,使网络设备能基于RA preamble估计与终
端设备之间的传输时延并以此校准上行定时,并通过RAR消息指示给终端设备。Specifically, the random access request message may include a random access preamble (random access preamble, RA preamble). Among them, the main function of the RA preamble may be to request access to the network device, so that the network device can estimate and finalize based on the RA preamble The transmission delay between end devices is used to calibrate the uplink timing, and the RAR message is used to indicate to the end device.
步骤二、RAR消息的传输,网络设备接收到随机接入请求消息,向终端设备发送RAR消息。其中,RAR消息又可以称之为消息2(Msg2)。Step 2, transmission of the RAR message, the network device receives the random access request message, and sends the RAR message to the terminal device. Wherein, the RAR message may also be called message 2 (Msg2).
具体地,网络设备在PDSCH(Physical Downlink Shared Channel,物理下行共享信道)有效载荷(payload)资源上向终端设备发送RAR消息。示例的,在本申请实施例中,RAR消息是通过RA-RNTI(random access radio network temporary identifier,随机接入无线网络临时标识)加扰得到的。在一些实施例中,RA-RNTI的取值是由承载RA preamble的资源的时频资源位置决定的。Specifically, the network device sends a RAR message to the terminal device on a PDSCH (Physical Downlink Shared Channel, physical downlink shared channel) payload (payload) resource. For example, in this embodiment of the application, the RAR message is obtained by scrambling through RA-RNTI (random access radio network temporary identifier, random access radio network temporary identifier). In some embodiments, the value of the RA-RNTI is determined by the time-frequency resource location of the resource bearing the RA preamble.
对于终端设备来说,终端设备发送RA preamble后,终端设备可以根据RA-RNTI,在RAR时间窗内监听PDCCH以获取DCI,接着终端设备根据DCI使用该RA-RNTI解析PDSCH payload,以接收对应由RA-RNTI加扰得到的RAR消息。如果在该RAR时间窗内没有接收到RAR消息,则认为此次随机接入过程失败。For the terminal device, after the terminal device sends the RA preamble, the terminal device can listen to the PDCCH in the RAR time window according to the RA-RNTI to obtain DCI, and then the terminal device uses the RA-RNTI to parse the PDSCH payload according to the DCI to receive the corresponding RA-RNTI scrambled RAR message. If no RAR message is received within the RAR time window, it is considered that the random access procedure fails.
RAR消息可以包含用于指定上行同步所需要的时间调整量、终端设备发送消息3所需的上行资源、临时C-RNTI等。The RAR message may include the time adjustment required for specifying the uplink synchronization, the uplink resources required by the terminal device to send the message 3, the temporary C-RNTI, and the like.
随机接入过程的前两步Msg1和Msg2主要完成了上行的时间同步,而Msg3和Msg4的主要目的是为终端设备指定一个唯一且合法的身份,C-RNTI,用于后面的数据传输。The first two steps of the random access process, Msg1 and Msg2, mainly complete the uplink time synchronization, while the main purpose of Msg3 and Msg4 is to specify a unique and legal identity for the terminal device, C-RNTI, for subsequent data transmission.
步骤三、消息3的传输,终端设备接收到RAR消息,向网络设备发送消息3。其中,消息3,即Msg3。示例的,终端设备在PUSCH(Physical Uplink Share Channel,物理上行共享信道)上向网络设备发送Msg3。进一步的,在一些实施例中,Msg3中包含终端设备唯一的标志。该标志可以用于步骤四的冲突解决。例如,对于处于RRC_CONNECTED态的终端设备来说,终端设备唯一的标志是C-RNTI;再例如,对于非RRC_CONNECTED态的终端设备来说,终端设备唯一的标志是来自核心网的唯一的终端设备标志(如S-TMSI或一个随机数)。Step 3, the transmission of the message 3, the terminal device receives the RAR message, and sends the message 3 to the network device. Among them, the message 3 is Msg3. For example, the terminal device sends Msg3 to the network device on PUSCH (Physical Uplink Share Channel, physical uplink shared channel). Further, in some embodiments, Msg3 includes the unique identifier of the terminal device. This flag can be used for conflict resolution in Step 4. For example, for a terminal device in the RRC_CONNECTED state, the unique identifier of the terminal device is C-RNTI; for another example, for a terminal device in a non-RRC_CONNECTED state, the only identifier for the terminal device is the unique terminal device identifier from the core network (eg S-TMSI or a random number).
步骤四、消息4的传输,网络设备接收到Msg3,向终端设备发送消息4。其中,消息4又可以称之为Msg4。Step 4, transmission of message 4, the network device receives Msg3, and sends message 4 to the terminal device. Wherein, message 4 may also be called Msg4.
网络设备在冲突解决机制中,在Msg4中携带该用于唯一标识终端设备的标志以指示胜出的终端设备,而其它没有在冲突解决中胜出的终端设备将重新发起随机接入。如果终端设备在Msg4中接收到的PDSCH由RAR消息中指定的TC-RNTI加扰,则当成功解码出的MAC PDU中包含的UE Contention Resolution Identity MAC control element与Msg3发送的CCCH SDU匹配时,终端设备会认为随机接入成功并将自己的TC-RNTI转化为C-RNTI。In the conflict resolution mechanism, the network device carries the flag for uniquely identifying the terminal device in Msg4 to indicate the winning terminal device, and other terminal devices that do not win the conflict resolution will re-initiate random access. If the PDSCH received by the terminal device in Msg4 is scrambled by the TC-RNTI specified in the RAR message, when the UE Contention Resolution Identity MAC control element contained in the successfully decoded MAC PDU matches the CCCH SDU sent by Msg3, the terminal The device will consider that the random access is successful and convert its TC-RNTI into a C-RNTI.
(2)2步随机接入(2-step random access)过程(2) 2-step random access (2-step random access) process
与4步随机接入过程相比,2步随机接入过程有助于降低终端设备的接入时延。Compared with the 4-step random access process, the 2-step random access process helps to reduce the access delay of the terminal device.
如图7所示,2步随机接入过程主要包括如下两个步骤:As shown in Figure 7, the 2-step random access process mainly includes the following two steps:
步骤一、MsgA的传输,即终端设备向网络设备发送MsgA。其中,MsgA包括随机接入请求消息。Step 1, MsgA transmission, that is, the terminal device sends the MsgA to the network device. Wherein, MsgA includes a random access request message.
此外,MsgA还包括Msg3。这里的Msg3指的是上述4步随机接入过程中的Msg3。也就是说,MsgA包括RA preamble和PUSCH payload两部分。In addition, MsgA also includes Msg3. The Msg3 here refers to the Msg3 in the above 4-step random access process. That is to say, MsgA includes two parts: RA preamble and PUSCH payload.
步骤二、MsgB的传输,即网络设备接收到MsgA,向终端设备发送MsgB。其中,MsgB又可以称之为消息B,包括Msg2和Msg4。这里的Msg2指的是上述4步随机接入过程中的Msg2,Msg4指的是上述4步随机接入过程中的Msg4。Step 2, the transmission of MsgB, that is, the network device receives MsgA and sends MsgB to the terminal device. Wherein, MsgB may also be called message B, including Msg2 and Msg4. Here, Msg2 refers to Msg2 in the above 4-step random access process, and Msg4 refers to Msg4 in the above 4-step random access process.
(3)RA preamble(3) RA preamble
1)RA preamble的组成、分类和数量1) Composition, classification and quantity of RA preamble
RA preamble可以由循环前缀(CP)和序列(sequence)组成。RA preamble can be composed of cyclic prefix (CP) and sequence (sequence).
RA preamble可以支持4种长度为839的长序列和9种长度为139的短序列,而RA preamble所组成的序列长度可以由高层参数prach-RootSequenceIndex指示。RA preamble can support 4 long sequences with a length of 839 and 9 short sequences with a length of 139, and the length of the sequence formed by the RA preamble can be indicated by the high-level parameter prach-RootSequenceIndex.
每个小区有64个可用的RA preamble,组成一个RA preamble序列,而每个RA preamble在该RA preamble序列中具有唯一的索引(RA preamble index)。其中,终端设备会从该RA preamble序列中选择一个(或由网络设备指定一个)RA preamble以使用物理随机接入信道机会(PRACH occation,RO)进行传输,即RA preamble由PRACH occation承载(或传输)。Each cell has 64 available RA preambles, forming an RA preamble sequence, and each RA preamble has a unique index (RA preamble index) in the RA preamble sequence. Among them, the terminal device will select one (or one designated by the network device) RA preamble from the RA preamble sequence to use the physical random access channel opportunity (PRACH occasion, RO) for transmission, that is, the RA preamble is carried (or transmitted) by the PRACH occasion ).
上述RA preamble序列可以包括如下两部分:The above RA preamble sequence can include the following two parts:
一部分为,由高层参数totalNumberOfRA-Preambles指示的用于基于竞争的随机接入前导码(CBRA preamble)序列和基于非竞争的随机接入前导码(CFRA preamble)序列;Part of it is the contention-based random access preamble (CBRA preamble) sequence and the non-contention-based random access preamble (CFRA preamble) sequence indicated by the high-level parameter totalNumberOfRA-Preambles;
另一部分为,除由高层参数totalNumberOfRA-Preambles指示之外的其他RA preamble序列。该其他RA preamble序列中的RA preamble用于其他目的,如请求***信息(SI)。
The other part is other RA preamble sequences except those indicated by the high-level parameter totalNumberOfRA-Preambles. The RA preambles in the other RA preamble sequence are used for other purposes, such as requesting system information (SI).
值得注意的是,如果高层参数totalNumberOfRA-Preambles未指示具体的RA preamble的数量,则上述64个RA preamble都用于基于竞争的随机接入和基于非竞争的随机接入。It is worth noting that if the high-level parameter totalNumberOfRA-Preambles does not indicate the number of specific RA preambles, the above 64 RA preambles are used for contention-based random access and non-contention-based random access.
另外,在一些实施例中,CBRA preambles又可以分为两组:组A(group A)和组B(group B)。其中,group B不一定存在,其可以由高层参数ssb-perRACH-OccasionAndCB-PreamblesPerSSB进行配置。In addition, in some embodiments, CBRA preambles can be divided into two groups: group A (group A) and group B (group B). Among them, group B does not necessarily exist, and it can be configured by the high-level parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB.
网络设备可以通过高层参数RACH-ConfigCommon(由SIB1中的BWP-Common所携带)来配置针对基于竞争的随机接入所需的参数,而网络设备可以通过高层参数RACH-ConfigDedicated来配置针对基于非竞争的随机接入所需的参数。The network device can configure the parameters required for contention-based random access through the high-level parameter RACH-ConfigCommon (carried by BWP-Common in SIB1), and the network device can configure the parameters for non-contention-based random access through the high-level parameter RACH-ConfigDedicated The parameters required for random access.
(4)PRACH时频资源(4) PRACH time-frequency resources
在随机接入过程中,PRACH消息的传输需要用到时频资源,对PRACH时频资源进行划分,得到至少一个物理随机接入信道时机(PRACH occasion,RO)。其中,RO用于传输或承载随机接入请求消息。RO可以包括时域资源和频域资源。具体的,时域资源可以通过时域资源的索引指示,频域资源可以通过频域资源的索引指示。In the random access process, the transmission of the PRACH message needs to use time-frequency resources, and the PRACH time-frequency resources are divided to obtain at least one physical random access channel opportunity (PRACH occasion, RO). Wherein, the RO is used to transmit or carry a random access request message. ROs may include time domain resources and frequency domain resources. Specifically, the time-domain resource may be indicated by an index of the time-domain resource, and the frequency-domain resource may be indicated by an index of the frequency-domain resource.
RO的时域位置或时域资源,即用于传输/承载RA premble/Msg1的PRACH时域资源,网络设备可以通过高层参数RACH-ConfigGeneric中的参数prach-ConfigurationIndex配置给终端设备的,例如具体配置方式可以参见表1。The time domain location or time domain resource of RO, that is, the PRACH time domain resource used to transmit/carry RA premble/Msg1, the network device can be configured to the terminal device through the parameter prach-ConfigurationIndex in the high-level parameter RACH-ConfigGeneric, such as specific configuration The method can be seen in Table 1.
表1定义了FR1和配对频谱/补充上行链路的随机接入配置。其中,nf表示***帧号,x表示PRACH配置周期,一个PRACH时隙内的RO个数,表示一个RO的时域符号长度。Table 1 defines random access configurations for FR1 and paired spectrum/supplementary uplink. Among them, n f represents the system frame number, x represents the PRACH configuration cycle, The number of ROs in a PRACH slot, Indicates the time-domain symbol length of an RO.
表1
Table 1
Table 1
例如,当PRACH Configuration Index为109时,存在如下:For example, when the PRACH Configuration Index is 109, the following exists:
·随机接入前导码格式采用A1/B1;The random access preamble format adopts A1/B1;
·每两个***帧(即***帧索引为偶数0,2,4…)中包含RO的时域资源(即nf mod 2=0);· Every two system frames (ie the system frame index is an even number 0, 2, 4...) contain RO time domain resources (ie n f mod 2 = 0);
·RO的时域资源的起始位置在***帧中的第4个子帧下,从第0个OFDM符号开始;The starting position of the time domain resources of the RO is under the 4th subframe in the system frame, starting from the 0th OFDM symbol;
·第4个子帧中有2个PRACH时隙,且每个PRACH时隙中有7个RO的时域资源索引;There are 2 PRACH slots in the 4th subframe, and there are 7 PRACH slots in each PRACH slot A time-domain resource index of an RO;
·RO的时域符号长度为2即占2个OFDM符号。The time-domain symbol length of RO is 2 That is, it occupies 2 OFDM symbols.
需要说明的是,在本申请实施例中,相邻的两个时域资源的索引所标识的时域资源可以是连续的,也可以是非连续的,例如,时域资源的的索引为index 0和index 1的情况下,index 0所标识的时域资源为***帧中的第4个子帧下的第0~1个OFDM符号,index 1所标识的时域资源为***帧中的第4个子帧下的第2~3个OFDM符号。It should be noted that, in this embodiment of the application, the time domain resources identified by the indexes of two adjacent time domain resources may be continuous or discontinuous, for example, the index of the time domain resources is index 0 In the case of and index 1, the time domain resource identified by index 0 is the 0th to 1st OFDM symbols under the 4th subframe in the system frame, and the time domain resource identified by index 1 is the 4th subframe in the system frame The 2nd to 3rd OFDM symbols under the frame.
高层参数RACH-ConfigGeneric中的参数msg1-FrequencyStart可以用于配置RO的起始频域资源位置到初始BWP(intial BWP)或当前活跃BWP(active BWP)的起始频域资源位置的偏移量(offset);The parameter msg1-FrequencyStart in the high-level parameter RACH-ConfigGeneric can be used to configure the offset from the initial frequency domain resource position of the RO to the initial BWP (intial BWP) or the current active BWP (active BWP) initial frequency domain resource position ( offset);
高层参数RACH-ConfigGeneric中的参数msg1-FDM可以用于配置RO的频域资源索引的个数。The parameter msg1-FDM in the high-level parameter RACH-ConfigGeneric can be used to configure the number of frequency domain resource indexes of the RO.
(5)同步信号块(Synchronization Signal and PBCH block,SSB)对应(映射/关联)波束(5) Synchronization Signal and PBCH block (SSB) corresponding (mapping/association) beam
在5G NR通信***中,小区频率增大,相应地,覆盖范围减小。为了增加小区的覆盖范围,发送一些广播信息时可以不再采用覆盖的形式,而是采用波束扫描(beam sweeping)的形式。In the 5G NR communication system, the frequency of the cell increases, and the coverage decreases accordingly. In order to increase the coverage of the cell, when sending some broadcast information, the form of coverage can no longer be used, but the form of beam sweeping (beam sweeping) can be used.
波束扫描,是在某一个时刻将能量集中在某一个方向,这个方向就可以把信号发送的更远,但其他方向接收不到信号;然后,下一个时刻朝着另一个方向发送;最终,通过不断的改变波束方向,实现整个小区的覆盖。
Beam scanning is to concentrate energy in a certain direction at a certain moment, and this direction can send the signal farther, but the signal cannot be received in other directions; then, send it in another direction at the next moment; finally, through Continuously change the beam direction to achieve the coverage of the entire cell.
在5G NR中的在随机接入过程使用了波束,而SSB在时域周期内有多次发送机会,且有相应的索引(index),即SSB索引。In 5G NR, beams are used in the random access process, and SSB has multiple transmission opportunities in the time domain period, and has a corresponding index (index), that is, SSB index.
每个波束可以对应(映射/关联)至少一个SSB索引,且不同的SSB索引各自所对应的波束可能是相同的(相同方向的)或不同的(不同方向的)。Each beam may correspond to (map/associate) at least one SSB index, and beams corresponding to different SSB indices may be the same (in the same direction) or different (in different directions).
SSB以半帧5ms为单位,也就是一个SS burst set。一个SS burst set中的所有SSB都要在同一个半帧内,进行周期发送。SSB是隔一段时间在某一个半帧内出现若干次,这若干个SSB中的每个SSB都对应一个波束扫描的方向,最终每个方向都会有一个SSB。SSB is in units of half frame 5ms, which is an SS burst set. All SSBs in an SS burst set must be sent periodically in the same half frame. SSBs appear several times in a certain half-frame at intervals, and each of these several SSBs corresponds to a beam scanning direction, and finally there will be one SSB in each direction.
对于终端设备而言,当SSB的波束扫描信号覆盖到终端设备时,终端设备才有机会发送RA preamble,即波束对应(关联/映射)RA preamble。此时,若网络设备收到终端设备的RA preamble,该网络设备就能知道下行最佳波束或最佳的下行波束。也就是说,该网络设备就知道哪个波束指向了该终端设备。For terminal devices, when the beam scanning signal of SSB covers the terminal device, the terminal device has the opportunity to send RA preamble, that is, beam corresponding (association/mapping) RA preamble. At this time, if the network device receives the RA preamble from the terminal device, the network device can know the best downlink beam or the best downlink beam. That is to say, the network device knows which beam points to the terminal device.
由于波束对应RA preamble,而波束又对应SSB,因此SSB需要与RA preamble对应(关联/映射)。此外,由于RA preamble需要基于RO进行发送,即RA preamble需要由RO承载(或传输),因此SSB需要与RO进行关联(映射/对应),以便网络设备知道在哪个波束下给终端设备发送Msg2。Since the beam corresponds to the RA preamble, and the beam corresponds to the SSB, the SSB needs to correspond (associate/map) to the RA preamble. In addition, since the RA preamble needs to be sent based on the RO, that is, the RA preamble needs to be carried (or transmitted) by the RO, the SSB needs to be associated (mapped/corresponded) with the RO so that the network device knows which beam to send Msg2 to the terminal device.
(6)SSB关联(映射/对应等)RO和SSB关联(映射/对应等)RA preamble(6) SSB association (mapping/correspondence, etc.) RO and SSB association (mapping/correspondence, etc.) RA preamble
网络设备可以通过高层参数ssb-perRACH-OccasionAndCB-PreamblesPerSSB为终端设备配置N(其中,N由L1参数SSB-per-rach-occasion所配置)个SSB关联(映射/对应)一个RO(N≥1),或者网络设备通过高层参数ssb-perRACH-OccasionAndCB-PreamblesPerSSB为终端设备配置一个SSB关联(映射/对应)1/N(其中,N由L1参数SSB-per-rach-occasion所配置)个RO(N<1),以及每个SSB关联(映射/对应)R(其中,R由L1参数CB-preambles-per-SSB所配置)个RA preamble index。The network device can configure N (where N is configured by the L1 parameter SSB-per-rach-occasion) SSB association (mapping/corresponding) to a RO (N≥1) for the terminal device through the high-level parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB , or the network device configures an SSB association (mapping/corresponding) 1/N (where N is configured by the L1 parameter SSB-per-rach-occasion) RO(N <1), and each SSB is associated (mapped/corresponded) R (where R is configured by the L1 parameter CB-preambles-per-SSB) RA preamble index.
示例的,N的取值可以是{1/8,1/4,1/2,1,2,4,8,16}。For example, the value of N may be {1/8, 1/4, 1/2, 1, 2, 4, 8, 16}.
对于N的配置有如下两种:There are two configurations for N:
一种是,N<1,在这种情况下,一个SSB可以关联1/N个有效的RO。其中,该SSB关联的preamble从RA preamble index为0起始。One is, N<1, in this case, one SSB can be associated with 1/N valid ROs. Wherein, the preamble associated with the SSB starts from RA preamble index 0.
例如,若N=1/8,则一个SSB关联8个RO,且该8个RO的起始点的preamble index为0。For example, if N=1/8, one SSB is associated with 8 ROs, and the preamble index of the starting point of the 8 ROs is 0.
另一种是,N≥1,在这种情况下,N个SSB关联一个RO。例如,SSB n可以从R个preamble中选择一个发送Msg1,0≤n≤N-1,n指的是SSB索引,而该SSB n关联的preamble从RA preamble index为起始。其中,由高层参数totalNumberOfRA-Preambles配置且为N的整数倍。The other is that N≥1, in this case, N SSBs are associated with one RO. For example, SSB n can select one of the R preambles to send Msg1, 0≤n≤N-1, n refers to the SSB index, and the preamble associated with the SSB n is from the RA preamble index as start. in, It is configured by the high-level parameter totalNumberOfRA-Preambles and is an integer multiple of N.
例如,以N=2,为例。在这种情况下,两个SSB关联1个RO,SSB0关联的RA preamble index从0起始,SSB1关联的RA preamble index从32起始。也就是说,SSB0关联index为0~31的RA preamble,SSB1关联index为32~(对应的RA preamble的总数-1)的RA preamble。For example, with N=2, as an example. In this case, two SSBs are associated with one RO, the RA preamble index associated with SSB0 starts from 0, and the RA preamble index associated with SSB1 starts from 32. That is to say, SSB0 is associated with RA preambles whose index is 0-31, and SSB1 is associated with RA preambles whose index is 32-(the total number of corresponding RA preambles-1).
需要说明的是,对于有效的RO,相关描述可以参见3GPP标准,可以理解为,对于FDD(Frequency Division Duplexing,频分双工)模式或成对频谱(paired spectrum),所有的RO都是有效的。It should be noted that for effective ROs, relevant descriptions can be found in 3GPP standards. It can be understood that, for FDD (Frequency Division Duplexing, frequency division duplexing) mode or paired spectrum (paired spectrum), all ROs are valid. .
对于TDD(Time Division Duplexing,时分双工)模式或非成对频谱(unpaired spectrum),若网络侧没有配置高层参数(如tdd-UL-DL-ConfigurationCommon),同时,RO的时域资源位置在SSB所在的符号位置之后,并且与终端设备接收到的最后一个SSB所在的符号位置间隔至少Ngap个符号,那么该RO是有效的,即有效的RO。其中,Ngap与RA preamble子载波间隔之间的关系可以如表2所示。For TDD (Time Division Duplexing, time division duplex) mode or unpaired spectrum (unpaired spectrum), if the network side does not configure high-level parameters (such as tdd-UL-DL-ConfigurationCommon), and at the same time, the time domain resource location of the RO is in the SSB After the symbol position, and at least N gap symbols away from the symbol position of the last SSB received by the terminal device, the RO is valid, that is, a valid RO. Wherein, the relationship between N gap and RA preamble subcarrier spacing can be shown in Table 2.
若网络侧配置了高层参数(如tdd-UL-DL-ConfigurationCommon),将RO配置在上行资源中,并且RO的时域资源位置在SSB所在的符号位置之后,且与终端设备接收到的最后一个SSB所在的符号位置间隔至少Ngap个符号,那么该RO是有效的,即有效的RO。If the network side configures high-level parameters (such as tdd-UL-DL-ConfigurationCommon), configure the RO in the uplink resource, and the time domain resource position of the RO is after the symbol position of the SSB, and is the same as the last If the symbol positions where the SSB is located are at least N gap symbols apart, then the RO is valid, that is, a valid RO.
表2
Table 2
Table 2
在表2中,对于子载波间隔(SCS)为1.25kHz/5kHz的RA preamble序列,Ngap的取值为0;对于子载波间隔(SCS)为15kHz/30kHz/60kHz/120kHz的RA preamble序列,Ngap的取值为2。In Table 2, for the RA preamble sequence whose subcarrier spacing (SCS) is 1.25kHz/5kHz, the value of N gap is 0; for the RA preamble sequence whose subcarrier spacing (SCS) is 15kHz/30kHz/60kHz/120kHz, The value of N gap is 2.
综上所述,SSB与RO之间的映射关系可以按照以下顺序依次映射:To sum up, the mapping relationship between SSB and RO can be mapped in the following order:
首先,在一个RO中RA preamble索引的顺序是递增的;First, the order of RA preamble indexes in an RO is increasing;
其次,频分复用(frequency multiplexed)RO的频域资源索引(frequency resource index)顺序是递
增的;Secondly, the frequency domain resource index (frequency resource index) order of the frequency multiplexed RO (frequency multiplexed) RO is descending increased;
再次,在一个PRACH时隙内的时分复用(time multiplexed)RO的时域资源索引(time resource index)的顺序是递增的;Again, the order of the time domain resource index (time resource index) of the time division multiplexed (time multiplexed) RO in a PRACH slot is increasing;
最后,PRACH时隙索引的顺序是递增的。Finally, the order of the PRACH slot index is increasing.
下面对上述“SSB与RO之间的映射关系”进行举例说明。The above-mentioned "mapping relationship between SSB and RO" is illustrated below with an example.
举例一:Example 1:
以小区内配置有8个SSB,其各自的索引分别为0~7,参数msg1-FDM=4,参数ssb-perRACH-Occasion=1/4为例。在这种情况下,SSB与RO之间的映射关系,如图8所示。Take 8 SSBs configured in a cell, their respective indexes are 0-7, the parameter msg1-FDM=4, and the parameter ssb-perRACH-Occasion=1/4 as an example. In this case, the mapping relationship between SSB and RO is shown in FIG. 8 .
在图8中,参数msg1-FDM=4表示在RO的1个时域资源上,RO的频域资源索引为index 0、index 1、index 2、index 3。In Figure 8, the parameter msg1-FDM=4 indicates that on one time domain resource of the RO, the frequency domain resource indexes of the RO are index 0, index 1, index 2, and index 3.
参数ssb-perRACH-Occasion=1/4(即N=1/4)表示1个SSB映射4个RO。The parameter ssb-perRACH-Occasion=1/4 (that is, N=1/4) indicates that one SSB is mapped to four ROs.
因此,按照频域资源索引的递增顺序,将SSB 0依次映射到4个RO,也就是,RO的时域资源的索引为index 0,且频域资源的索引为index 0、index 1、index 2、index 3的RO中。Therefore, according to the increasing order of the frequency domain resource index, SSB 0 is mapped to four ROs in turn, that is, the index of the time domain resource of the RO is index 0, and the index of the frequency domain resource is index 0, index 1, index 2 , in the RO of index 3.
由于SSB个数为8,此时SSB还没有映射完,因此根据上述的“映射原则”,按照频域资源的索引的递增顺序,将SSB 1依次映射到4个RO中,也就是RO的时域资源的索引为index 1时,频域资源索引为index 0、index 1、index 2、index 3的RO中,以此类推。Since the number of SSBs is 8, the SSBs have not been mapped yet. Therefore, according to the above-mentioned "mapping principle", SSB 1 is mapped to four ROs in sequence according to the increasing order of the index of the frequency domain resources, that is, the time of the ROs. When the index of the domain resource is index 1, the frequency domain resource indexes are in the ROs of index 0, index 1, index 2, and index 3, and so on.
举例二:Example two:
以小区内配置有8个SSB,其各自的索引分别为0~7,参数msg1-FDM=4,参数ssb-perRACH-Occasion=1为例。在这种情况下,SSB与RO映射关系,如图9所示。Take 8 SSBs configured in a cell, their respective indexes are 0-7, the parameter msg1-FDM=4, and the parameter ssb-perRACH-Occasion=1 as an example. In this case, the mapping relationship between SSB and RO is shown in Figure 9.
在图9中,参数msg1-FDM=4表示在RO的1个时域资源上,RO的频域资源索引为index 0、index 1、index 2、index 3。In Figure 9, the parameter msg1-FDM=4 indicates that on one time domain resource of the RO, the frequency domain resource indexes of the RO are index 0, index 1, index 2, and index 3.
参数ssb-perRACH-Occasion=1表示1个SSB映射1个RO。因此,按照频域资源索引递增的顺序,将SSB 0~3依次映射到RO的时域资源索引为index 0,且频域资源索引为index 0、index 1、index 2、index 3的RO中,即SSB 0映射RO的时域资源索引为index 0时,频域资源索引为index 0的RO中,依次类推。The parameter ssb-perRACH-Occasion=1 indicates that one SSB is mapped to one RO. Therefore, according to the increasing order of the frequency domain resource index, map SSB 0~3 to the RO whose time domain resource index is index 0, and the frequency domain resource index is index 0, index 1, index 2, index 3 in RO, That is, when SSB 0 maps the time-domain resource index of the RO to index 0, the frequency-domain resource index is to the RO of index 0, and so on.
由于SSB个数为8,此时SSB还没有映射完,因此根据上述的“映射原则”,将SSB 4~7按照频域资源索引的递增顺序依次映射到RO的时域资源索引为index 2,且频域资源索引为index 0、index 1、index 2、index 3的RO中,以此类推。Since the number of SSBs is 8, the SSBs have not been mapped at this time. Therefore, according to the above-mentioned "mapping principle", SSBs 4 to 7 are mapped to the time-domain resource index of the RO in order of increasing frequency-domain resource index as index 2. And the frequency domain resource index is in the RO of index 0, index 1, index 2, index 3, and so on.
举例三:Example three:
以小区内配置有8个SSB,其各自的索引分别为0~7,参数msg1-FDM=4,参数ssb-perRACH-Occasion=2为例。在这种情况下,SSB与RO映射关系,如图10所示。Take 8 SSBs configured in a cell, their respective indexes are 0-7, the parameter msg1-FDM=4, and the parameter ssb-perRACH-Occasion=2 as an example. In this case, the mapping relationship between SSB and RO is shown in Figure 10.
在图10中,参数msg1-FDM=4表示在RO的1个时域资源上,RO的频域资源索引为index 0、index 1、index 2、index 3。In Figure 10, the parameter msg1-FDM=4 indicates that on one time domain resource of the RO, the frequency domain resource indexes of the RO are index 0, index 1, index 2, and index 3.
参数ssb-perRACH-Occasion=2表示2个SSB映射1个RO。The parameter ssb-perRACH-Occasion=2 indicates that 2 SSBs are mapped to 1 RO.
具体映射如下:The specific mapping is as follows:
SSB 0/1映射RO的时域资源的索引为index 0,且频域资源的索引为index 0的RO上,SSB 2/3映射RO的时域资源的索引为index 0,且频域资源的索引为index 1的RO上,SSB 4/5映射RO的时域资源的索引为index 0,且频域资源的索引为index 2的RO上,SSB 6/7映射RO的时域资源的索引为index 0,且频域资源的索引为index 3的RO上。SSB 0/1 maps the time domain resource index of RO to index 0, and the index of the frequency domain resource is index 0 on the RO, SSB 2/3 maps the index of the time domain resource of the RO to index 0, and the frequency domain resource index is On the RO with index 1, SSB 4/5 maps the index of the time domain resource of the RO to index 0, and on the RO with the index of the frequency domain resource at index 2, the index of the time domain resource mapped to the RO by SSB 6/7 is index 0, and the index of the frequency domain resource is on the RO of index 3.
其余同理以此类推。The rest can be deduced in the same way.
(7)CSI-RS关联(或映射)RO(7) CSI-RS association (or mapping) RO
CSI-RS与SSB类似,CSI-RS ID与波束有对应关系。如果随机接入过程由高层请求触发,且CSI-RS index与RO关联,则在参数ra-PreambleIndex不为0的情况下,参数ra-OccasionList指示该CSI-RS Index所关联的RO集合。CSI-RS is similar to SSB, and the CSI-RS ID has a corresponding relationship with the beam. If the random access process is triggered by a high-level request, and the CSI-RS index is associated with the RO, then if the parameter ra-PreambleIndex is not 0, the parameter ra-OccasionList indicates the RO set associated with the CSI-RS Index.
(8)Msg1的传输(8) Transmission of Msg1
在随机接入过程中,终端设备可以使用RO来传输(承载)Msg1。其中,随机接入过程的触发方式有以下3种:During the random access process, the terminal device can use the RO to transmit (carry) Msg1. Among them, there are the following three ways to trigger the random access process:
●PDCCH order触发:网络设备通过特殊的DCI format 1_0通知终端设备需要发起随机接入过程,并通知终端设备应该使用的ra-PreambleIndex、SSB Index、PRACH Mask Index以及指示UL还是SUL的UL/SUL Indicator。PDCCH order triggering: The network device notifies the terminal device through a special DCI format 1_0 that it needs to initiate a random access process, and notifies the terminal device of the ra-PreambleIndex, SSB Index, PRACH Mask Index and the UL/SUL Indicator indicating whether UL or SUL should be used .
●MAC层触发:终端设备选择RA preamble以发起随机接入过程。
●MAC layer trigger: The terminal device selects RA preamble to initiate the random access process.
●RRC层触发:如初始接入、重建立、切换、RRC_INACTIVE转换到RRC_CONNECTED态、请求其他SI、RRC在同步重配时的请求等。● RRC layer triggers: such as initial access, re-establishment, handover, transition from RRC_INACTIVE to RRC_CONNECTED state, request for other SI, RRC request during synchronous reconfiguration, etc.
终端设备要传输Msg1时需要执行以下操作:When the terminal device wants to transmit Msg1, it needs to perform the following operations:
1)选择SSB或CSI-RS1) Select SSB or CSI-RS
需要说明的是,RA preamble index的取值范围与SSB索引或CSI-RS索引具有关联(映射/对应)关系,且SSB索引或CSI-RS索引与RO具有映射关系。It should be noted that the value range of the RA preamble index has an association (mapping/corresponding) relationship with the SSB index or the CSI-RS index, and the SSB index or the CSI-RS index has a mapping relationship with the RO.
①选择SSB① Select SSB
终端设备可以通过信道估计得到SSB的SS-RSRP,再将SSB的SS-RSRP与参数rsrp-ThresholdSSB进行比较。如果存在一个SSB的SS-RSRP大于参数rsrp-ThresholdSSB,则终端设备选择该SSB;否则,终端设备任意选择一个SSB。The terminal device can obtain the SS-RSRP of the SSB through channel estimation, and then compare the SS-RSRP of the SSB with the parameter rsrp-ThresholdSSB. If there is an SSB whose SS-RSRP is greater than the parameter rsrp-ThresholdSSB, the terminal device selects the SSB; otherwise, the terminal device selects an SSB arbitrarily.
如果有多个SSB的SS-RSRP大于参数rsrp-ThresholdSSB,则终端设备从该多个SSB中任意选择一个SSB。If the SS-RSRP of multiple SSBs is greater than the parameter rsrp-ThresholdSSB, the terminal device randomly selects one SSB from the multiple SSBs.
上述仅为一种选择SSB的策略的举例说明,本申请实施例对SSB选择的策略不做限定。The foregoing is only an illustration of a strategy for selecting an SSB, and this embodiment of the present application does not limit the strategy for selecting an SSB.
②选择CSI-RS②Choose CSI-RS
在选择CSI-RS时,将CSI-RS的CSI-RSRP与参数rsrp-ThresholdCSI-RS进行比较,如果存在一个CSI-RS的CSI-RSRP大于参数rsrp-ThresholdCSI-RS,则终端设备选择该CSI-RS。When selecting a CSI-RS, compare the CSI-RSRP of the CSI-RS with the parameter rsrp-ThresholdCSI-RS. If there is a CSI-RS whose CSI-RSRP is greater than the parameter rsrp-ThresholdCSI-RS, the terminal device selects the CSI-RS. RS.
2)选择RA preamble index2) Select RA preamble index
RA preamble index可以是由终端设备选择的,也可以是由网络设备指示的。The RA preamble index can be selected by the terminal device or indicated by the network device.
3)选择用于承载(传输)RA preamble的PRACH资源3) Select the PRACH resource used to carry (transmit) the RA preamble
4)确定对应的RA-RNTI4) Determine the corresponding RA-RNTI
RO的时频资源位置确定了RA-RNTI值。在传输RA preamble之后,终端设备会根据RO的时频资源位置计算RA-RNTI,以便接收由RA-RNTI加扰的RAR,RA-RNTI计算公式如下所示(不适用于波束失败恢复请求的基于非竞争的随机接入前导):The time-frequency resource location of the RO determines the RA-RNTI value. After transmitting the RA preamble, the terminal device will calculate the RA-RNTI according to the time-frequency resource position of the RO in order to receive the RAR scrambled by the RA-RNTI. non-contention random access preamble):
RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_idRA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id
其中,s_id是RO的第一个OFDM符号的索引(0≤s_id<14),t_id是***帧中RO的第一个时隙的索引(0≤t_id<80),f_id是频域中的RO的索引(0≤f_id<8),ul_carrier_id是用于RA preamble传输的UL载波(0表示正常上行载波,1表示SUL载波)。Among them, s_id is the index of the first OFDM symbol of the RO (0≤s_id<14), t_id is the index of the first slot of the RO in the system frame (0≤t_id<80), f_id is the RO in the frequency domain The index of (0≤f_id<8), ul_carrier_id is the UL carrier used for RA preamble transmission (0 means normal uplink carrier, 1 means SUL carrier).
5)确定RA preamble的目标接收功率5) Determine the target receiving power of RA preamble
4、一种通信方法4. A communication method
3GPP标准通常假设NTN通信***中终端设备的天线增益为0dBi,但在实际通信过程中,终端设备的天线增益往往达不到上述要求。由于终端设备的天线增益无法满足要求,因此在终端设备进行随机接入时,网络设备可能无法成功接收终端设备所发送的随机接入请求消息(如消息1或Msg1)。对此,需要对NTN通信***下的覆盖性进行增强以保证随机接入请求消息的成功传输。The 3GPP standard usually assumes that the antenna gain of the terminal equipment in the NTN communication system is 0dBi, but in the actual communication process, the antenna gain of the terminal equipment often cannot meet the above requirements. Since the antenna gain of the terminal device cannot meet the requirement, when the terminal device performs random access, the network device may not successfully receive the random access request message (such as message 1 or Msg1 ) sent by the terminal device. For this, it is necessary to enhance the coverage under the NTN communication system to ensure the successful transmission of the random access request message.
基于此,本申请实施例中通过引入指示信息,使得网络设备可以通过指示信息向终端设备指示为SSB索引或SSB配置的随机接入请求消息的重复(repetition)次数,然后终端设备可以根据选择的SSB对应的随机接入请求消息的重复次数,向网络设备多次(或重复)发送随机接入请求消息,因而有助于实现覆盖增强,提高随机接入请求消息的传输可靠性,以及提升终端设备随机接入成功的可能性。Based on this, the embodiment of the present application introduces indication information, so that the network device can indicate to the terminal device the number of repetitions (repetition) of the random access request message configured for the SSB index or SSB through the indication information, and then the terminal device can according to the selected The number of repetitions of the random access request message corresponding to the SSB, and the random access request message is sent to the network device multiple times (or repeatedly), thus helping to achieve coverage enhancement, improve the transmission reliability of the random access request message, and improve the terminal Probability of device random access success.
具体实现如下:The specific implementation is as follows:
●对于网络设备●For network equipment
网络设备可以发送指示信息,该指示信息可以用于指示随机接入请求消息的重复次数,该随机接入请求消息的重复次数与SSB索引对应(关联或映射)。The network device may send indication information, and the indication information may be used to indicate the repetition times of the random access request message, and the repetition times of the random access request message correspond to (associate or map) the SSB index.
需要说明的是,在本申请实施例中,该指示信息可以用于指示随机接入请求消息的重复次数,又可以替换为以下描述,该指示信息可以用于配置随机接入请求消息的重复次数。It should be noted that, in this embodiment of the application, the indication information may be used to indicate the number of repetitions of the random access request message, and may be replaced by the following description, the indication information may be used to configure the number of repetitions of the random access request message .
●对于终端设备●For terminal equipment
终端设备可以接收该指示信息,并根据该随机接入请求消息的重复次数,发送随机接入请求消息。The terminal device may receive the indication information, and send a random access request message according to the number of repetitions of the random access request message.
下面以随机接入请求消息为Msg1为例,进行具体说明。The following takes the random access request message as Msg1 as an example for specific description.
需要说明的是,网络设备针对不同的SSB索引配置的Msg1的重复次数可以不同,这是因为:It should be noted that the number of repetitions of Msg1 configured by the network device for different SSB indexes can be different, because:
在同一小区下,由于不同波束各自对应的天线仰角不同,不同波束的覆盖区域和卫星之间的距离也不同,因此不同波束各自的信号强度也存在着差异,比如,在卫星覆盖中心点的信号强度大于边缘部分的信号强度。由于随机接入使用波束,因此当终端设备在不同波束的覆盖区域中进行随机接入时,需要的Msg1的重复次数可能不同。
In the same cell, due to the different antenna elevation angles corresponding to different beams, the distance between the coverage area of different beams and the satellite is also different, so the signal strength of different beams is also different, for example, the signal at the center of satellite coverage The strength is greater than the signal strength of the edge portion. Since beams are used for random access, when a terminal device performs random access in coverage areas of different beams, the required number of repetitions of Msg1 may be different.
由于每个波束可以对应至少一个SSB,网络设备可以为小区中的SSB索引(index)配置Msg1的重复次数。在随机接入过程可以使用为波束对应的SSB索引所配置的Msg1的重复次数。也可以理解为,小区中的SSB索引对应Msg1的重复次数。Since each beam can correspond to at least one SSB, the network device can configure the repetition times of Msg1 for the SSB index (index) in the cell. The repetition times of Msg1 configured for the SSB index corresponding to the beam may be used in the random access process. It can also be understood that the SSB index in the cell corresponds to the number of repetitions of Msg1.
在SSB的波束扫描信号覆盖到终端设备的情况下,终端设备可以有机会发送Msg1。由于与波束关联的SSB对应Msg1的重复次数,因此终端设备可以按照与选择的SSB对应的Msg1的重复次数进行传输,从而有利于实现覆盖增强。In the case that the beam scanning signal of the SSB covers the terminal device, the terminal device may have an opportunity to send Msg1. Since the SSB associated with the beam corresponds to the number of repetitions of Msg1, the terminal device can transmit according to the number of repetitions of Msg1 corresponding to the selected SSB, which is beneficial to achieve coverage enhancement.
进一步的,由于波束对应RA preamble,而波束又对应SSB,因此SSB需要与RA preamble对应。此外,由于RA preamble需要由RO承载(或传输),因此与Msg1的重复次数对应的SSB需要与RO进行关联。Further, since the beam corresponds to the RA preamble, and the beam corresponds to the SSB, the SSB needs to correspond to the RA preamble. In addition, since the RA preamble needs to be carried (or transmitted) by the RO, the SSB corresponding to the number of repetitions of Msg1 needs to be associated with the RO.
另外,在一些实施例中,网络设备从Msg1的重复次数的候选值集合中选择为SSB索引配置的Msg1的重复次数的取值。In addition, in some embodiments, the network device selects the value of the repetition number of Msg1 configured for the SSB index from the candidate value set of the repetition number of Msg1 .
其中,不同SSB索引对应的Msg1的重复次数可以是不相同的,也可以是相同的,主要由网络设备的具体实现决定。在本申请的一些实施例中,对应同一Msg1的重复次数的SSB索引的SSB属于一个SSB组(group)。也就是说,属于同一个SSB组中的每个SSB索引对应的Msg1的重复次数相同。Wherein, the number of repetitions of Msg1 corresponding to different SSB indexes may be different or the same, which is mainly determined by the specific implementation of the network device. In some embodiments of the present application, the SSBs of the SSB indexes corresponding to the repetition times of the same Msg1 belong to one SSB group. That is to say, the number of repetitions of Msg1 corresponding to each SSB index belonging to the same SSB group is the same.
为了实现上述的技术方案,下面对可能涉及的其他内容、概念和含义做进一步解释说明。In order to realize the above-mentioned technical solution, other contents, concepts and meanings that may be involved will be further explained below.
(1)随机接入请求消息的重复次数(1) Number of repetitions of the random access request message
需要说明的是,随机接入请求消息的重复次数,可以用于表示多次(或重复)传输随机接入请求消息的次数。例如,Msg1的重复次数。It should be noted that the number of repetitions of the random access request message may be used to indicate the number of times (or repetitions) of the random access request message being transmitted multiple times. For example, the number of repetitions for Msg1.
(2)第一小区(2) The first community
本申请实施例的第一小区,可以是终端设备驻留的小区,可以是终端设备在小区搜索中所选择的小区,也可以是终端设备的服务小区等,对此不作具体限制。The first cell in this embodiment of the present application may be a cell where the terminal device resides, may be a cell selected by the terminal device in cell search, or may be a serving cell of the terminal device, etc., and there is no specific limitation on this.
在一些可能的实现中,第一小区可以为终端设备的服务小区。In some possible implementations, the first cell may be a serving cell of the terminal device.
例如,对于处于连接态、空闲态或非激活态的终端设备来说,第一小区为终端设备的服务小区。For example, for a terminal device in a connected state, an idle state or an inactive state, the first cell is a serving cell of the terminal device.
在一些可能的实现中,第一小区可以为终端设备驻留的小区。In some possible implementations, the first cell may be a cell where the terminal device resides.
例如,对于初始接入网络的终端设备或首次接入网络的终端设备,第一小区为终端设备驻留的小区。需要说明的是,在本申请实施例中,终端设备初始接入网络,终端驻留的小区也可以理解为终端设备的服务小区。For example, for a terminal device that initially accesses the network or a terminal device that accesses the network for the first time, the first cell is the cell where the terminal device resides. It should be noted that, in the embodiment of the present application, the terminal device initially accesses the network, and the cell where the terminal resides may also be understood as the serving cell of the terminal device.
比如,响应于关闭飞行模式或开机操作,终端设备向网络设备发起初始接入网络的流程。For example, in response to turning off the airplane mode or turning on the device, the terminal device initiates a process of initially accessing the network to the network device.
需要说明的是,第一小区指的用于为终端设备提供服务的小区,也可以是用于终端设备接入网络的小区等,也可以采用其他术语描述,如目标小区等,只有具有相同的含义/功能/解释,都在本申请实施例所要求保护的范围内。It should be noted that the first cell refers to a cell used to provide services for terminal devices, and may also be a cell used for terminal devices to access the network, etc., and may also be described by other terms, such as target cells, etc., only with the same The meaning/function/interpretation are all within the scope of protection claimed by the embodiments of the present application.
(3)指示信息(3) Instructions
为了实现向终端设备指示由网络设备为第一小区中的SSB索引配置Msg1的重复次数,本申请实施例引入了指示信息,网络设备通过指示信息为终端设备指示或配置Msg1的重复次数。In order to indicate to the terminal device that the network device configures the number of repetitions of Msg1 for the SSB index in the first cell, the embodiment of the present application introduces indication information, and the network device indicates or configures the number of repetitions of Msg1 for the terminal device through the indication information.
需要说明的是,Msg1的重复次数与SSB索引之间的对应关系可以是网络配置的,可以是预配置的,可以是协议规定的,可以是显示或隐式指示的,对此不作具体限制。It should be noted that the correspondence between the number of repetitions of Msg1 and the SSB index may be configured by the network, may be pre-configured, may be stipulated by a protocol, and may be explicitly or implicitly indicated, and there is no specific limitation on this.
例如,网络设备可以直接将该对应关系指示给终端设备。For example, the network device may directly indicate the corresponding relationship to the terminal device.
又例如,网络设备可以按照与指示给终端设备的SSB索引的顺序来指示Msg1的重复次数,从而隐式向终端设备指示该对应关系,有助于减少信令开销。比如,网络设备依次指示给终端设备SSB0、SSB1和SSB2,再通过指示信息依次指示的Msg1的重复次数为1、2和3。此时,SSB0对应Msg1的重复次数为1,SSB1对应的Msg1的重复次数为2,SSB2对应的Msg1的重复次数为3。For another example, the network device may indicate the number of repetitions of Msg1 in the order of the SSB index indicated to the terminal device, so as to implicitly indicate the corresponding relationship to the terminal device, which helps to reduce signaling overhead. For example, the network device instructs the terminal devices SSB0 , SSB1 and SSB2 in sequence, and the repeat times of Msg1 indicated sequentially through the indication information are 1, 2 and 3. At this time, the repetition count of Msg1 corresponding to SSB0 is 1, the repetition count of Msg1 corresponding to SSB1 is 2, and the repetition count of Msg1 corresponding to SSB2 is 3.
另外,指示信息也可以采用其他术语描述,如第一信息、配置信息等,只有具有相同的含义/功能/解释,都在本申请实施例所要求保护的范围内。In addition, the indication information may also be described in other terms, such as first information, configuration information, etc., as long as they have the same meaning/function/interpretation, they are all within the scope of protection claimed in the embodiments of the present application.
在一些可能的实现中,指示信息可以是在小区搜索、小区重选、上下行同步、小区接入、小区驻留、初始接入或上下行资源调度等过程中发送或接收的。In some possible implementations, the indication information may be sent or received during cell search, cell reselection, uplink and downlink synchronization, cell access, cell camping, initial access, or uplink and downlink resource scheduling.
在一些可能的实现中,指示信息可以由***信息(SI)、高层信令(如RRC信令)、终端设备专属信令等携带。In some possible implementations, the indication information may be carried by system information (SI), high-level signaling (such as RRC signaling), terminal equipment-specific signaling, and the like.
例如,网络设备可以广播***信息,该***信息携带该指示信息,从而通过广播的方式实现配置Msg1的重复次数。For example, the network device may broadcast system information, and the system information carries the indication information, so as to configure the number of repetitions of Msg1 through broadcasting.
(4)SSB索引和SSB组(4) SSB index and SSB group
在本申请实施例中,SSB索引可以是网络设备通过***信息或高层参数指示给终端设备的,从而实
现网络设备为终端设备配置SSB。例如,网络设备可以是在小区搜索、小区重选、上下行同步、小区接入、小区驻留、初始接入或上下行资源调度等过程中为终端设备指示SSB索引的。In the embodiment of this application, the SSB index may be indicated by the network device to the terminal device through system information or high-level parameters, so as to realize The current network device configures SSB for the terminal device. For example, the network device may indicate the SSB index for the terminal device in processes such as cell search, cell reselection, uplink and downlink synchronization, cell access, cell camping, initial access, or uplink and downlink resource scheduling.
例如,网络设备可以通过***信息或高层参数为终端设备指示第一小区中的多个SSB的SSB索引。For example, the network device may indicate to the terminal device the SSB indexes of the multiple SSBs in the first cell through system information or high-layer parameters.
例如,在小区搜索过程中,网络设备通过SIB1或高层参数ServingCellConfigCommon中的ssb-PositionsInBurst为终端设备指示第一小区的个SSB的SSB索引,从而实现终端设备的SSB的配置。For example, during the cell search process, the network device indicates the position of the first cell to the terminal device through SIB1 or ssb-PositionsInBurst in the high layer parameter ServingCellConfigCommon. The SSB index of each SSB, so as to realize the configuration of the SSB of the terminal device.
进一步的,在一些实施例中,本申请实施例网络设备可以按照SSB组为终端设备配置SSB对应的Msg1的重复次数。例如,指示信息指示P0,P0为大于或等于1的正整数,P0对应SSB组1,SSB组1包括SSB1、SSB2和SSB3,则SSB1、SSB2和SSB3对应的Msg1的重复次数均为P0,在这种情况下,P0对应SSB1、SSB2和SSB3的Msg1的重复次数。通过这种方式有助于节省信令开销。需要说明的是,在本申请实施例中,不同SSB组中的SSB的个数可以相同,也可以不同,对此不做限定。Further, in some embodiments, the network device in this embodiment of the present application may configure the repetition times of Msg1 corresponding to the SSB for the terminal device according to the SSB group. For example, the indication information indicates P0, P0 is a positive integer greater than or equal to 1, P0 corresponds to SSB group 1, and SSB group 1 includes SSB1, SSB2 and SSB3, then the repetition times of Msg1 corresponding to SSB1, SSB2 and SSB3 are all P0, in In this case, P0 corresponds to the number of repetitions of Msg1 of SSB1, SSB2 and SSB3. In this way, it helps to save signaling overhead. It should be noted that, in this embodiment of the present application, the numbers of SSBs in different SSB groups may be the same or different, and this is not limited.
(5)Ki和Kj
(5) K i and K j
当然,在本申请实施例中,也可以按照SSB为终端设备配置SSB对应的Msg1的重复次数。例如,指示信息指示P1和P2,P1对应SSB1,P2对应SSB2。在这种情况下,SSB1对应的Msg1的重复次数为P1,SSB2的SSB索引对应的Msg1的重复次数为P2,其中,P1和P2可以相同,也可以不同。P1和P2均为大于或等于1的正整数。应理解,在本申请实施例中,指示信息可以仅指示一个Msg1的重复次数,也可以指示多个Msg1的重复次数,对此不做限定。Certainly, in the embodiment of the present application, the repetition times of Msg1 corresponding to the SSB may also be configured for the terminal device according to the SSB. For example, the indication information indicates P1 and P2, P1 corresponds to SSB1, and P2 corresponds to SSB2. In this case, the number of repetitions of Msg1 corresponding to SSB1 is P1, and the number of repetitions of Msg1 corresponding to the SSB index of SSB2 is P2, where P1 and P2 may be the same or different. Both P1 and P2 are positive integers greater than or equal to 1. It should be understood that, in this embodiment of the present application, the indication information may only indicate the number of repetitions of one Msg1, or may indicate the number of repetitions of multiple Msg1s, which is not limited.
再例如,指示信息用于指示Ki,Ki为与SSB索引i对应的Msg1的重复次数,其中,SSB索引i所标识的SSB为第一小区中的SSB,1≤i≤M,i为正整数,M为第一小区中SSB的总个数。再例如,指示信息用于指示Ki和Kj,关于Ki可以参见上述相关介绍,在此不再赘述。Kj为与SSB索引j对应的Msg1的重复次数,其中,SSB索引j所标识的SSB为第一小区中的SSB,且SSB索引j所标识的SSB与SSS索引i所标识的SSB不同,即j与i是不同的取值。1≤j≤M,j为正整数。For another example, the indication information is used to indicate K i , where K i is the number of repetitions of Msg1 corresponding to SSB index i, where the SSB identified by SSB index i is the SSB in the first cell, 1≤i≤M, and i is A positive integer, M is the total number of SSBs in the first cell. For another example, the indication information is used to indicate K i and K j , for K i , reference may be made to the relevant introduction above, and details are not repeated here. K j is the number of repetitions of Msg1 corresponding to SSB index j, where the SSB identified by SSB index j is the SSB in the first cell, and the SSB identified by SSB index j is different from the SSB identified by SSS index i, that is j and i are different values. 1≤j≤M, j is a positive integer.
进一步的,在一些实施例中,不同SSB索引对应的Msg1的重复次数不同。以SSB索引i和SSB索引j为例。SSB索引i对应Ki,SSB索引j对应Kj,在不同SSB索引对应的Msg1的重复次数不同的情况下,Ki与Kj不同。或者,与不同波束对应的SSB对应的Msg1的重复次数不同。以SSB索引i和SSB索引j为例。SSB索引i对应Ki,SSB索引j对应Kj。若与SSB索引i所标识的SSB对应的波束、和与SSB索引j所标识的SSB对应的波束不同,则Ki与Kj不同。在一些实施例中,若与SSB索引i所标识的SSB对应的波束、和与SSB索引j所标识的SSB对应的波束相同,则Ki与Kj可以不同,也可以相同。Further, in some embodiments, the repetition times of Msg1 corresponding to different SSB indexes are different. Take SSB index i and SSB index j as an example. SSB index i corresponds to K i , SSB index j corresponds to K j , and when the repetition times of Msg1 corresponding to different SSB indexes are different, K i and K j are different. Alternatively, the repetition times of Msg1 corresponding to SSBs corresponding to different beams are different. Take SSB index i and SSB index j as an example. SSB index i corresponds to K i , and SSB index j corresponds to K j . If the beam corresponding to the SSB identified by the SSB index i is different from the beam corresponding to the SSB identified by the SSB index j, K i and K j are different. In some embodiments, if the beam corresponding to the SSB identified by the SSB index i is the same as the beam corresponding to the SSB identified by the SSB index j, then K i and K j may be different or the same.
在本申请的另一些实施例中,网络设备可以从Msg1的重复次数候选值集合选择为终端设备指示与SSB索引对应的Msg1的重复次数。Msg1的重复次数候选值集合可以是通过协议预定义的,也可以是网络设备基于某一算法或策略确定的,还可以是其它设备或服务器指示的,对此不做限定。示例的,Msg1的重复次数候选值集合可以包括至少一个候选值。例如,每个候选值为2的幂数。在这种情况下,Msg1的重复次数候选值集合为集合{1,2,4,8,16,…,2n}。示例的,n的取值可以是预定义的,可以是协议预定义的,可以是网络设备基于某一算法或策略确定的,可以是其它设备或服务器指示的,对此不作具体限制。In some other embodiments of the present application, the network device may select from the set of candidate values of the repetition number of Msg1 to indicate the repetition number of Msg1 corresponding to the SSB index for the terminal device. The set of candidate values for the number of repetitions of Msg1 may be predefined by a protocol, determined by a network device based on a certain algorithm or policy, or instructed by other devices or servers, which is not limited. Exemplarily, the repetition count candidate value set of Msg1 may include at least one candidate value. For example, each candidate value is a power of 2. In this case, the set of candidate values for the number of repetitions of Msg1 is set {1, 2, 4, 8, 16, . . . , 2 n }. For example, the value of n may be predefined, may be predefined by a protocol, may be determined by a network device based on a certain algorithm or policy, or may be instructed by other devices or servers, and there is no specific limitation on this.
例如,以SSB索引i为例。SSB索引i对应Ki,Ki=2a,a为大于或等于0的正整数。For example, take SSB index i as an example. The SSB index i corresponds to K i , where K i =2 a , and a is a positive integer greater than or equal to 0.
或者,在本申请的又一些实施例中,与SSB索引对应的Msg1的重复次数为2的幂数。例如,以SSB索引i为例。SSB索引i对应Ki,Ki=2a,a为大于或等于0的正整数。再例如,以SSB索引j为例。SSB索引j对应Kj,Kj=2b,b为大于或等于0的正整数。Or, in still some embodiments of the present application, the repetition times of Msg1 corresponding to the SSB index is a power of 2. For example, take SSB index i as an example. The SSB index i corresponds to K i , where K i =2 a , and a is a positive integer greater than or equal to 0. For another example, take the SSB index j as an example. The SSB index j corresponds to K j , K j =2 b , and b is a positive integer greater than or equal to 0.
(6)PRACH时频资源(6) PRACH time-frequency resources
终端设备进行随机接入,需要使用相应的PRACH时频资源,对PRACH时频资源进行划分,得到至少一个RO。其中,RO用于传输或承载随机接入请求消息。RO包括时域资源和频域资源。具体的,时域资源可以通过时域资源的索引指示,频域资源可以通过频域资源的索引指示。To perform random access, the terminal device needs to use corresponding PRACH time-frequency resources, and divide the PRACH time-frequency resources to obtain at least one RO. Wherein, the RO is used to transmit or carry a random access request message. The RO includes time domain resources and frequency domain resources. Specifically, the time-domain resource may be indicated by an index of the time-domain resource, and the frequency-domain resource may be indicated by an index of the frequency-domain resource.
PRACH时频资源可以是网络设备通过高层参数配置给终端设备的。例如,网络设备可以在小区搜索、小区重选、上下行同步、小区接入、小区驻留、初始接入或上下行资源调度等过程中配置给终端设备的。The PRACH time-frequency resource may be configured by the network device to the terminal device through high-layer parameters. For example, the network device may be configured to the terminal device during cell search, cell reselection, uplink and downlink synchronization, cell access, cell camping, initial access, or uplink and downlink resource scheduling.
例如,结合上述“(4)PRACH时频资源”中的内容可知,在本申请实施例中,网络设备可以通过高层参数RACH-ConfigGeneric中的参数prach-ConfigurationIndex配置RO的时域位置或时域资源,以及通过高层参数RACH-ConfigGeneric中的参数msg1-FrequencyStart和参数msg1-FDM配置RO的频域位
置或RO的频域资源索引的个数,从而实现配置PRACH时频资源。For example, in combination with the content in the above "(4) PRACH time-frequency resource", in the embodiment of this application, the network device can configure the time domain position or time domain resource of the RO through the parameter prach-ConfigurationIndex in the high layer parameter RACH-ConfigGeneric , and configure the frequency domain bit of the RO through the parameter msg1-FrequencyStart and the parameter msg1-FDM in the high-level parameter RACH-ConfigGeneric The number of frequency-domain resource indexes of configuration or RO, so as to realize the configuration of PRACH time-frequency resources.
(7)SSB索引与RO之间的映射关系(7) Mapping relationship between SSB index and RO
在现有3GPP标准中,SSB与RO之间的映射关系无法适用于Msg1的多次(或重复)传输的情况。如果终端设备需要多次(或重复)传输Msg1,那么现有3GPP所规定的标准协议将不再适用。因此,本申请实施例需要重新研究对应有Msg1的重复次数的SSB索引与RO之间的映射关系。In the existing 3GPP standard, the mapping relationship between SSB and RO cannot be applied to the situation of multiple (or repeated) transmission of Msg1. If the terminal device needs to transmit the Msg1 multiple times (or repeatedly), the standard protocol specified by the existing 3GPP will no longer be applicable. Therefore, the embodiment of the present application needs to re-study the mapping relationship between the SSB index corresponding to the repetition number of Msg1 and the RO.
基于此,在本申请实施例中,在SSB索引与RO进行映射时,可以具体实现如下:Based on this, in the embodiment of the present application, when the SSB index and the RO are mapped, the specific implementation can be as follows:
◆确定第一小区中的SSB索引映射RO的映射顺序。◆ Determine the mapping order of the SSB index mapping RO in the first cell.
网络设备可以向终端设备指示(配置)第一小区的SSB,比如向终端设备指示第一小区的M个SSB。本申请实施例中,终端设备可以按照下述映射顺序依次映射与SSB对应的RO。The network device may indicate (configure) the SSBs of the first cell to the terminal device, for example, indicate M SSBs of the first cell to the terminal device. In the embodiment of the present application, the terminal device may sequentially map the ROs corresponding to the SSB according to the following mapping sequence.
示例的,该映射顺序可以如下:For example, the mapping order can be as follows:
◆一种是:按照SSB索引各自对应的Msg1的重复次数进行降序排序,以及具有相同重复次数的SSB索引进行升序排序。◆One is: sort in descending order according to the repetition times of Msg1 corresponding to the SSB indexes, and sort in ascending order by the SSB indexes with the same repetition times.
例如,网络设备通过***信息向终端设备指示为与用于标识第一小区中的SSB的SSB索引(SSB i,i=0,1,2,…,5)对应的Msg1的重复次数(Ki),例如,SSB索引与Msg1的重复次数之间对应关系为即,SSB0对应的Msg1的重复次数为8,SSB1对应的Msg1的重复次数为2,依次类推。For example, the network device indicates to the terminal device the repetition times (K i ), for example, the correspondence between the SSB index and the number of repetitions of Msg1 is That is, the repetition times of Msg1 corresponding to SSB0 is 8, the repetition times of Msg1 corresponding to SSB1 is 2, and so on.
然后,先按照与SSB索引对应的Msg1的重复次数降序排序,其中,对于具有相同Msg1的重复次数的SSB索引,按照SSB索引升序排列,重新排序后的SSB索引与Msg1的重复次数之间的对应关系为因此,在进行映射时,映射顺序为:SSB0→SSB4→SSB5→SSB1→SSB2→SSB3。Then, sort in descending order according to the number of repetitions of Msg1 corresponding to the SSB index, wherein, for SSB indexes with the same number of repetitions of Msg1, sort them in ascending order according to the SSB index, and the correspondence between the reordered SSB index and the number of repetitions of Msg1 relationship is Therefore, when mapping, the mapping order is: SSB0→SSB4→SSB5→SSB1→SSB2→SSB3.
◆另一种是:按照SSB索引各自对应的Msg1的重复次数进行升序排序,其中,具有相同重复次数的SSB索引进行升序排序。◆The other is: sort in ascending order according to the repetition times of Msg1 corresponding to the respective SSB indexes, wherein the SSB indexes with the same repetition times are sorted in ascending order.
◆又一种是:按照SSB索引各自对应的Msg1的重复次数进行降序排序,其中,具有相同重复次数的SSB索引进行降序排序。◆Another method is: sort in descending order according to the repetition times of Msg1 corresponding to the SSB indexes, wherein the SSB indexes with the same repetition times are sorted in descending order.
◆又一种是:按照SSB索引各自对应的Msg1的重复次数进行升序排序,其中,具有相同重复次数的SSB索引进行降序排序。◆Another one is: sorting in ascending order according to the repetition times of Msg1 corresponding to the SSB indexes, wherein the SSB indexes with the same repetition times are sorting in descending order.
另外,本申请实施例还可以以SSB组为粒度,依次映射与SSB对应的RO。具体的,映射顺序可以如下:In addition, in this embodiment of the present application, ROs corresponding to SSBs may be sequentially mapped using SSB groups as a granularity. Specifically, the mapping order can be as follows:
◆一种是:按照SSB组各自对应的Msg1的重复次数进行降序排序,以及同一SSB组中的SSB索引进行升序排序。◆One is: sort in descending order according to the repetition times of Msg1 corresponding to each SSB group, and sort in ascending order by the SSB indexes in the same SSB group.
◆另一种是:按照SSB组各自对应的Msg1的重复次数进行降序排序,以及同一SSB组中的SSB索引进行降序排序。◆The other is: sort in descending order according to the number of repetitions of Msg1 corresponding to each SSB group, and sort in descending order the SSB indexes in the same SSB group.
◆又一种是:按照SSB组各自对应的Msg1的重复次数进行升序排序,以及同一SSB组中的SSB索引进行升序排序。◆Another one is: sorting in ascending order according to the repetition times of Msg1 corresponding to each SSB group, and sorting in ascending order according to the SSB indexes in the same SSB group.
◆又一种是:按照SSB组各自对应的Msg1的重复次数进行升序排序,以及同一SSB组中的SSB索引进行降序排序。◆Another one is: sorting in ascending order according to the repetition times of Msg1 corresponding to each SSB group, and sorting in descending order by the SSB indexes in the same SSB group.
等等。etc.
◆以第一小区中的SSB索引各自对应的Msg1的重复次数中的最大值为粒度对RO的时域资源索引进行划分,得到RO组。换句话说,RO组也就是在时域上包括K个RO,K为网络设备指示给终端设备的至少一个Msg1的重复次数中的最大值。◆ Divide the time-domain resource index of the RO with the maximum value of the repetition times of Msg1 corresponding to the SSB indexes in the first cell as the granularity, and obtain the RO group. In other words, the RO group includes K ROs in the time domain, and K is the maximum value among the repetition times of at least one Msg1 indicated by the network device to the terminal device.
本申请实施例需要对PRACH时频资源中的RO的时域资源索引进行划分。The embodiment of the present application needs to divide the time-domain resource index of the RO in the PRACH time-frequency resource.
以网络设备可以通过高层参数prach-ConfigurationIndex向终端设备指示多个RO的时域资源索引为例。当第一小区中的SSB索引对应的Msg1的重复次数中的最大值为K时,依次以该K个RO的时域资源索引为粒度划分得到RO组,以便在RO组内依次映射SSB索引。例如,以第一小区中的SSB索引对应的Msg1的重复次数中的最大值为K=8为例,第一个RO组中RO的时域资源索引为index 0、index 1、index 2、index 3、index 4、index 5、index 6、index 7,第二个RO组中RO的时域资源索引为index 8、index 9、index 10、index 11、index 12、index 13、index 14、index 15,依次类推。Take the time-domain resource index of multiple ROs that the network device can indicate to the terminal device through the high-layer parameter prach-ConfigurationIndex as an example. When the maximum value of the repetition times of Msg1 corresponding to the SSB index in the first cell is K, the RO group is obtained by sequentially dividing the time-domain resource indexes of the K ROs, so as to sequentially map the SSB index in the RO group. For example, taking the maximum value of the repetition times of Msg1 corresponding to the SSB index in the first cell as K=8, the time domain resource indexes of the ROs in the first RO group are index 0, index 1, index 2, index 3. index 4, index 5, index 6, index 7, the time domain resource indexes of ROs in the second RO group are index 8, index 9, index 10, index 11, index 12, index 13, index 14, index 15 ,And so on.
以网络设备可以通过高层参数RACH-ConfigGeneric中的参数msg1-FDM向终端设备指示RO的频域资源索引的个数。例如,参数msg1-FDM=4表示在RO的1个时域资源上,RO的频域资源索引为
index 0、index 1、index 2、index 3。The network device can indicate the number of frequency domain resource indexes of the RO to the terminal device through the parameter msg1-FDM in the high layer parameter RACH-ConfigGeneric. For example, the parameter msg1-FDM=4 indicates that on one time domain resource of RO, the frequency domain resource index of RO is index 0, index 1, index 2, index 3.
◆第一小区中的SSB索引与RO之间的映射关系可以由高层参数确定。◆The mapping relationship between the SSB index in the first cell and the RO can be determined by high-layer parameters.
需要说明的是,结合上述“(6)SSB关联(映射/对应等)RO和SSB关联(映射/对应等)RA preamble”中的内容可知,高层可以通过高层参数(如该高层参数为ssb-perRACH-OccasionAndCB-PreamblesPerSSB)来配置N(如N是由L1参数SSB-per-rach-occasion配置)个SSB关联(映射/对应)一个RO,以及该N个SSB中的每个SSB关联(映射/对应)R(如R是由L1参数CB-preambles-per-SSB配置)个RA preamble index。It should be noted that, combined with the content in the above "(6) SSB association (mapping/correspondence, etc.) RO and SSB association (mapping/correspondence, etc.) RA preamble", it can be seen that the upper layer can pass the upper layer parameter (for example, the higher layer parameter is ssb- perRACH-OccasionAndCB-PreamblesPerSSB) to configure N (for example, N is configured by the L1 parameter SSB-per-rach-occasion) SSBs are associated (mapped/corresponded) to an RO, and each SSB in the N SSBs is associated (mapped/ Corresponding) R (for example, R is configured by the L1 parameter CB-preambles-per-SSB) RA preamble index.
其中,该N个SSB是从第一小区中的SSB中选择的。Wherein, the N SSBs are selected from SSBs in the first cell.
在一些可能的实现中,N的取值可以为1/8、1/4、1/2、1、2、4、8、16中的一个。In some possible implementations, the value of N may be one of 1/8, 1/4, 1/2, 1, 2, 4, 8, and 16.
若N<1,则表示一个SSB可以映射N个RO中;若N=1,则表示一个SSB可以映射于一个RO中;若N>1,则表示一个RO可以映射至多N个SSB。If N<1, it means that one SSB can be mapped to N ROs; if N=1, it means that one SSB can be mapped in one RO; if N>1, it means that one RO can be mapped to at most N SSBs.
示例性的,当N>1时,SSB索引的映射规则如下。Exemplarily, when N>1, the mapping rule of the SSB index is as follows.
在一些可能的实现中,当N>1时,同一个RO所映射的N个SSB以RA preamble index进行区分。其中,可以存在如下映射规则:In some possible implementations, when N>1, the N SSBs mapped to the same RO are distinguished by the RA preamble index. Among them, the following mapping rules can exist:
◆以T作为RO的时域资源索引的个数,即RO组中的T个RO的时域资源索引,T为N个SSB索引各自对应的Msg1的重复次数中的最大值,以及该N个SSB按照该T个RO的时域资源索引进行映射。◆Using T as the number of time-domain resource indexes of ROs, that is, the time-domain resource indexes of T ROs in the RO group, T is the maximum value among the repetition times of Msg1 corresponding to each of the N SSB indexes, and the N The SSB is mapped according to the time-domain resource indexes of the T ROs.
若该T个RO的时域资源索引中存在有RO映射该N个SSB索引中的1个SSB索引,则该RO映射的该1个SSB所关联的RA preamble index从0起始;If there is one SSB index among the N SSB indexes mapped by the RO in the time domain resource index of the T ROs, then the RA preamble index associated with the one SSB mapped by the RO starts from 0;
若该T个RO的时域资源索引中存在有RO映射该N个SSB索引中的2个SSB索引,则该RO映射的该2个SSB以RA preamble index进行区分;If there are two SSB indexes among the N SSB indexes mapped by ROs in the time domain resource indexes of the T ROs, then the two SSBs mapped by the ROs are distinguished by RA preamble index;
若该T个RO的时域资源索引中存在有RO映射有该N个SSB索引中的S(2≤S≤N)个SSB索引,则该RO映射的该S个SSB以RA preamble index进行区分。If there are ROs mapped to S (2≤S≤N) SSB indexes among the N SSB indexes in the time domain resource indexes of the T ROs, then the S SSBs mapped to the RO are distinguished by RA preamble index .
综上所述,N个SSB索引各自映射的RO存在相同和/或不相同。To sum up, the ROs mapped to each of the N SSB indexes are the same or/or different.
若N个SSB索引各自映射的RO存在相同,则N个SSB索引以同一(相同)RO中的RA preamble index进行区分。If the N SSB indexes map to the same RO, then the N SSB indexes are distinguished by the RA preamble index in the same (same) RO.
例如,当N=2时,表示2个SSB映射到1个RO上。若SSB0和SSB1需要映射到同一个RO,且SSB0对应的Msg1的重复次数为8,SSB1对应的Msg1的重复次数为4,则以8作为RO的时域资源索引的个数,即RO组中的8个RO的时域资源索引,以及该2个SSB按照该8个RO的时域资源索引进行映射。For example, when N=2, it means that 2 SSBs are mapped to 1 RO. If SSB0 and SSB1 need to be mapped to the same RO, and the number of repetitions of Msg1 corresponding to SSB0 is 8, and the number of repetitions of Msg1 corresponding to SSB1 is 4, then 8 is used as the number of time domain resource indexes of the RO, that is, in the RO group The time-domain resource indexes of the eight ROs, and the two SSBs are mapped according to the time-domain resource indexes of the eight ROs.
在该8个RO的时域资源索引中的前4个RO均映射SSB0和SSB1,并以RA preamble index进行区分,而后4个RO只映射SSB0,并且该后4个RO所映射的SSB0关联的RA preamble index从0起始。The first 4 ROs in the time domain resource index of the 8 ROs are all mapped to SSB0 and SSB1, and are distinguished by RA preamble index, while the last 4 ROs only map to SSB0, and the SSB0 associated with the last 4 ROs are mapped RA preamble index starts from 0.
◆SSB索引,按照RA preamble index的递增顺序(升序)映射RO。◆SSB index, mapping RO according to the increasing order (ascending order) of RA preamble index.
可以理解的是,SSB与RO之间的映射关系可以遵循如下:在一个RO中RA preamble index的顺序是递增的,以及SSB按照RO中RA preamble index的递增顺序(升序)进行映射。It can be understood that the mapping relationship between SSB and RO can follow the following: the order of RA preamble index in an RO is increasing, and the SSB is mapped according to the increasing order (ascending order) of RA preamble index in RO.
◆SSB索引映射到RO,按照RO组为粒度进行映射,RO组在时域上包括K个RO,K为Msg1的重复次数中的最大值。先在时域资源索引为index 0~K-1,频域资源索引最小的RO组上,按照时域资源索引从小到大的顺序,在RO组中依次进行映射。接着,在时域资源索引为index 0~K-1,频域资源索引最小的RO组中的RO全部映射完成后,增加频域资源索引和/或时域资源索引,得到下一个RO组,然后按照时域资源索引从小到大的顺序继续在RO组中依次进行映射,以此类推。SSB索引对应的Msg1的重复次数在时域范围上打包进行映射。◆The SSB index is mapped to the RO, and the mapping is carried out according to the granularity of the RO group. The RO group includes K ROs in the time domain, and K is the maximum value among the repetition times of Msg1. First, on the RO group whose time domain resource index is index 0 to K-1 and the frequency domain resource index is the smallest, map in the RO group sequentially according to the order of the time domain resource index from small to large. Next, after the time-domain resource index is index 0-K-1, and the RO group with the smallest frequency-domain resource index has been mapped, add the frequency-domain resource index and/or the time-domain resource index to obtain the next RO group, Then continue to map in the RO group sequentially according to the order of the time domain resource index from small to large, and so on. The number of repetitions of Msg1 corresponding to the SSB index is packaged and mapped in the time domain.
例如,SSB0对应的Msg1的重复次数为8,当N=1/2时,表示1个SSB映射到2个RO上,参数msg1-FDM=4表示在RO的1个时域资源上,RO的频域资源索引为index 0、index 1、index 2、index 3。先在时域资源索引为index 0~7,频域资源索引最小的RO组上,即频域资源索引为index 0的RO组上,按照时域资源索引从小到大的顺序,依次映射SSB0对应的RO。在频域资源索引最小的RO组中的RO全部映射完成后,增加频域资源索引,得到频域资源索引为index 1的RO组,然后按照时域资源索引从小到大的顺序,依次映射SSB0对应的RO,在SSB0对应的RO映射完成后,若频域资源索引为index1的RO组全部映射完成,则继续增加频域资源索引。For example, the number of repetitions of Msg1 corresponding to SSB0 is 8. When N=1/2, it means that one SSB is mapped to two ROs. The parameter msg1-FDM=4 means that on one time domain resource of RO, the The frequency domain resource indexes are index 0, index 1, index 2, and index 3. First, on the RO group whose time domain resource index is index 0-7 and the frequency domain resource index is the smallest, that is, on the RO group whose frequency domain resource index is index 0, map the SSB0 corresponding to the time domain resource index in ascending order. the RO. After all the ROs in the RO group with the smallest frequency domain resource index are mapped, increase the frequency domain resource index to obtain the RO group with the frequency domain resource index index 1, and then map SSB0 in sequence according to the order of the time domain resource index from small to large For the corresponding RO, after the mapping of the RO corresponding to SSB0 is completed, if all the RO groups whose frequency domain resource index is index1 are mapped, continue to increase the frequency domain resource index.
可以理解的是,本申请实施例以RO组为粒度,依次进行SSB索引与RO之间的映射。It can be understood that, in this embodiment of the present application, the mapping between the SSB index and the RO is sequentially performed with the RO group as the granularity.
(8)发送Msg1
(8) Send Msg1
需要说明的是,本申请实施例可以根据Msg1的重复次数发送Msg1,以实现覆盖增强。It should be noted that in this embodiment of the present application, Msg1 may be sent according to the number of repetitions of Msg1, so as to achieve coverage enhancement.
下面以网络设备向终端设备配置Ki为例进行具体说明。The configuration of K i from the network device to the terminal device is taken as an example for specific description below.
具体实现时,终端设备可以根据Ki发送Msg1。During specific implementation, the terminal device may send Msg1 according to K i .
另外,由于Msg1需要由RO承载(或传输),因此为了实现重复发送Msg1,本申请实施例还需要根据Ki确定多个RO,并通过该多个RO中的至少一个RO发送Msg1以实现Msg1的多次(或重复)传输。In addition, because Msg1 needs to be carried (or transmitted) by ROs, in order to realize repeated sending of Msg1, the embodiment of the present application also needs to determine multiple ROs according to K i , and send Msg1 through at least one RO in the multiple ROs to realize Msg1 Multiple (or repeated) transmissions.
例如,根据Ki,确定Mi个RO,Ki≤Mi≤Ki*L;其中,L=N,N>1;或者,L=1/N,N≤1;N可以用于指示SSB索引i指示的SSB与RO的映射关系;选择Mi个RO中的Ki个RO,发送Msg1。For example, according to K i , determine M i ROs, K i ≤ M i ≤ K i *L; where, L=N, N>1; or, L=1/N, N≤1; N can be used to indicate The mapping relationship between SSB and RO indicated by SSB index i; select K i ROs from M i ROs, and send Msg1.
需要说明的是,结合上述“(7)SSB索引与RO之间的映射关系”中的内容,N可以由高层参数(如该高层参数由L1参数SSB-per-rach-occasion)配置。It should be noted that, in combination with the content in the above "(7) Mapping relationship between SSB index and RO", N can be configured by a high-level parameter (for example, the high-level parameter is configured by the L1 parameter SSB-per-rach-occasion).
在一些实施例中,终端设备可以基于下列方式根据Ki,确定Mi个RO:In some embodiments, the terminal device may determine Mi ROs according to Ki in the following manner:
◆若Ki=K,且N≤1,则Mi个RO分为1/N个RO组,RO组在时域上包括K个RO,K可以为指示信息指示的随机接入请求消息的重复次数中的最大值。◆If K i =K, and N≤1, then M i ROs are divided into 1/N RO groups, and RO groups include K ROs in the time domain, and K can be the random access request message indicated by the indication information The maximum number of repetitions.
需要说明的是,RO组包括K个RO的时域资源索引所标识的时域资源所在的RO。也就是说,RO组包括时域上的K个RO。It should be noted that the RO group includes the ROs where the time domain resources identified by the time domain resource indexes of the K ROs are located. That is, the RO group includes K ROs in the time domain.
另外,Ki=K,说明SSB索引i对应的Msg1的重复次数(即Ki)为最大值。另外,N≤1,表示一个SSB可以映射N个RO。由于本申请实施例需要以第一小区中的SSB索引各自对应的Msg1的重复次数中的最大值为粒度对RO的时域资源索引进行划分,因此本申请实施例可以根据Ki确定出1/N个RO组,而每个RO组在时域上包括K个RO,从而从该1/N个RO组中选择一个RO组以得到K个RO,以便多次(或重复)传输Msg1。In addition, K i =K, which means that the number of repetitions of Msg1 corresponding to the SSB index i (that is, K i ) is the maximum value. In addition, N≤1 means that one SSB can map N ROs. Since the embodiment of the present application needs to divide the time-domain resource index of the RO at the granularity of the maximum value of the repetition times of Msg1 corresponding to the SSB indexes in the first cell, the embodiment of the present application can determine 1/ There are N RO groups, and each RO group includes K ROs in the time domain, so one RO group is selected from the 1/N RO groups to obtain K ROs, so as to transmit Msg1 multiple times (or repeatedly).
◆若N>1,或者若N≤1且Ki/N≤K,则Mi个RO位于同一RO组,RO组在时域上包括K个RO,K为指示信息指示的随机接入请求消息的重复次数中的最大值。◆If N>1, or if N≤1 and K i /N≤K, then M i ROs are located in the same RO group, and the RO group includes K ROs in the time domain, and K is the random access request indicated by the indication information The maximum number of repetitions for the message.
需要说明的是,RO组包括K个RO的时域资源索引。也就是说,RO组在时域上包括K个RO。其中,RO包括时域资源和频域资源,时域资源可以通过时域资源index指示,频域资源可以通过频域资源index指示。It should be noted that the RO group includes time-domain resource indexes of K ROs. That is, the RO group includes K ROs in the time domain. The RO includes time domain resources and frequency domain resources, the time domain resources can be indicated by the time domain resource index, and the frequency domain resources can be indicated by the frequency domain resource index.
另外,N>1,表示一个RO可以映射N个SSB。此时,本申请实施例可以根据Ki确定出的Mi个RO位于同一RO组,从而从同一RO组中选择Ki个RO,以便多次(或重复)传输Msg1。其中,该RO组是按照Msg1的重复次数中的最大值为粒度对RO的时域资源索引进行划分的。In addition, N>1 means that one RO can map N SSBs. At this time, in the embodiment of the present application, the M i ROs determined according to K i are located in the same RO group, so that K i ROs are selected from the same RO group, so as to transmit Msg1 multiple times (or repeatedly). Wherein, the RO group divides the time-domain resource indexes of the ROs according to the maximum value of the repetition times of Msg1 as the granularity.
同理,N≤1,表示一个SSB可以映射N个RO。另外,Ki/N≤K,说明SSB索引i对应的Msg1的重复次数(即Ki)不为最大值。此时,本申请实施例可以根据Ki确定出的Mi个RO位于同一RO组,从而从同一RO组中选择Ki个RO,以便多次(或重复)传输Msg1。其中,该RO组是按照Msg1的重复次数中的最大值为粒度对RO的时域资源索引进行划分的。Similarly, N≤1 means that one SSB can map N ROs. In addition, K i /N≤K indicates that the number of repetitions of Msg1 corresponding to the SSB index i (that is, K i ) is not the maximum value. At this time, in the embodiment of the present application, the M i ROs determined according to K i are located in the same RO group, so that K i ROs are selected from the same RO group, so as to transmit Msg1 multiple times (or repeatedly). Wherein, the RO group divides the time-domain resource indexes of the ROs according to the maximum value of the repetition times of Msg1 as the granularity.
◆若N>1,则同一RO对应N个SSB。◆If N>1, the same RO corresponds to N SSBs.
需要说明的是,N>1,表示一个RO可以映射N个SSB。It should be noted that N>1 means that one RO can map N SSBs.
◆同一RO对应的N个SSB所对应的Msg1的重复次数是相同的或不相同的。◆The repetition times of Msg1 corresponding to N SSBs corresponding to the same RO are the same or different.
需要说明的是,一个RO可以映射N个SSB,而N个SSB中的各个SSB对应的Msg1的重复次数可以是相同的,也可以是不同的。It should be noted that one RO may be mapped to N SSBs, and the number of repetitions of Msg1 corresponding to each of the N SSBs may be the same or different.
●一种是:终端设备是按照与SSB索引对应的Msg1的重复次数从大到小的顺序(降序)依次确定RO的。终端设备针对具有同一Msg1的重复次数的SSB索引,按照从小到大的顺序(升序)确定RO的。● One is: the terminal device determines ROs in descending order (descending order) of the repetition times of Msg1 corresponding to the SSB index. The terminal device determines the ROs in ascending order (ascending order) for the SSB indexes with the repetition times of the same Msg1.
需要说明的是,结合上述“(7)SSB索引与RO之间的映射关系”中的内容可知,映射顺序可以为按照SSB索引各自对应的Msg1的重复次数进行降序排序,其中,具有相同重复次数的SSB索引进行升序排序。It should be noted that, in combination with the content in the above "(7) Mapping relationship between SSB index and RO", it can be seen that the mapping order can be sorted in descending order according to the number of repetitions of Msg1 corresponding to each SSB index, wherein The SSB index is sorted in ascending order.
●另一种是:终端设备是按照与SSB索引对应的Msg1的重复次数从小到大的顺序(升序)依次确定RO的。终端设备针对具有同一Msg1的重复次数的SSB索引,按照从小到大的顺序(升序)确定RO的。●The other is: the terminal device determines the ROs sequentially in ascending order (ascending order) of the repetition times of Msg1 corresponding to the SSB index. The terminal device determines the ROs in ascending order (ascending order) for the SSB indexes with the repetition times of the same Msg1.
需要说明的是,结合上述“(7)SSB索引与RO之间的映射关系”中的内容可知,映射顺序可以为按照SSB索引各自对应的Msg1的重复次数进行升序排序,其中,具有相同重复次数的SSB索引进行升序排序。It should be noted that, in combination with the content in the above "(7) Mapping relationship between SSB index and RO", it can be seen that the mapping order can be sorted in ascending order according to the number of repetitions of Msg1 corresponding to each SSB index, wherein The SSB index is sorted in ascending order.
●又一种是:终端设备是按照与SSB索引对应的Msg1的重复次数从大到小的顺序(降序)依次确定RO的。终端设备针对具有同一Msg1的重复次数的SSB索引,按照从大到小的顺序
(降序)确定RO的。●Another one is: the terminal device determines the ROs sequentially in descending order (descending order) of the repetition times of Msg1 corresponding to the SSB index. For the SSB index of the repetition times of the same Msg1, the terminal device is in descending order (descending order) to determine RO's.
需要说明的是,结合上述“(7)SSB索引与RO之间的映射关系”中的内容可知,映射顺序可以为按照SSB索引各自对应的Msg1的重复次数进行降序排序,其中,具有相同重复次数的SSB索引进行降序排序。It should be noted that, in combination with the content in the above "(7) Mapping relationship between SSB index and RO", it can be seen that the mapping order can be sorted in descending order according to the number of repetitions of Msg1 corresponding to each SSB index, wherein The SSB index is sorted in descending order.
●又一种是:终端设备是按照与SSB索引对应的Msg1的重复次数从小到大的顺序(升序)依次确定RO的。终端设备针对具有同一Msg1的重复次数的SSB索引,是按照从大到小的顺序(降序)确定RO的。●Another one is: the terminal device determines the ROs in ascending order (in ascending order) of the repetition times of Msg1 corresponding to the SSB index. For the SSB indexes with the repetition times of the same Msg1, the terminal device determines ROs in descending order (descending order).
需要说明的是,结合上述“(7)SSB索引与RO之间的映射关系”中的内容可知,映射顺序可以为按照SSB索引各自对应的Msg1的重复次数进行升序排序,其中,具有相同重复次数的SSB索引进行降序排序。It should be noted that, in combination with the content in the above "(7) Mapping relationship between SSB index and RO", it can be seen that the mapping order can be sorted in ascending order according to the number of repetitions of Msg1 corresponding to each SSB index, wherein The SSB index is sorted in descending order.
(9)举例说明(9) Examples
下面本申请实施例将对上述“(7)SSB索引与RO之间的映射关系”和上述“(8)发送Msg1”中的内容分别进行举例说明。The following embodiments of the present application will respectively illustrate the content in the above "(7) Mapping relationship between SSB index and RO" and the above "(8) Sending Msg1".
举例1:Example 1:
如图11所示,卫星1110发送的信号在小区中至少形成6个波束,即波束1121、波束1122、波束1123、波束1124、波束1125和波束1126。其中,该6个波束各自对应一个SSB,即波束1121对应SSB0、波束1122对应SSB1、波束1123对应SSB2、波束1124对应SSB3、波束1125对应SSB4、波束1126对应SSB5。此时,小区中至少有6个SSB索引。As shown in FIG. 11 , the signal sent by the satellite 1110 forms at least six beams in the cell, that is, beam 1121 , beam 1122 , beam 1123 , beam 1124 , beam 1125 and beam 1126 . Each of the six beams corresponds to one SSB, that is, beam 1121 corresponds to SSB0, beam 1122 corresponds to SSB1, beam 1123 corresponds to SSB2, beam 1124 corresponds to SSB3, beam 1125 corresponds to SSB4, and beam 1126 corresponds to SSB5. At this time, there are at least 6 SSB indexes in the cell.
网络设备通过***信息为小区中的6个SSB索引各自配置Msg1的重复次数(Ki),即
The network device configures the repetition times (K i ) of Msg1 for each of the six SSB indexes in the cell through the system information, that is,
以网络设备通过高层参数(如该高层参数为参数SSB-per-rach-occasion)为终端设备配置N,通过高层参数(如该高层参数为参数prach-ConfigurationIndex)为终端设备配置的RO的时域资源的索引分别为index 0、index 1、index 2、index 3、index 4、index 5、index 6、index 7、index 8、index 9、index 10、index 11、index 12、index 13、index 14、index 15、……,以及通过高层参数(如该高层参数为参数msg1-FDM=4)配置RO的频域资源的索引分别为index 0、index 1、index 2、index 3。其中,相邻的两个时域资源索引所标识的时域资源可以是连续的,也可以是非连续的。The network device configures N for the terminal device through the high-level parameter (such as the high-level parameter is the parameter SSB-per-rach-occasion), and configures the RO time domain for the terminal device through the high-level parameter (such as the high-level parameter is the parameter prach-ConfigurationIndex) The indexes of resources are index 0, index 1, index 2, index 3, index 4, index 5, index 6, index 7, index 8, index 9, index 10, index 11, index 12, index 13, index 14, index 15, ..., and the indices of the frequency domain resources configured with the RO through high-level parameters (such as the parameter msg1-FDM=4) are index 0, index 1, index 2, and index 3, respectively. Wherein, the time domain resources identified by two adjacent time domain resource indexes may be continuous or discontinuous.
当该6个SSB索引与RO进行映射时,具体实现如下:When the six SSB indexes are mapped with RO, the specific implementation is as follows:
◆对该6个SSB索引各自对应的Msg1的重复次数进行降序排序,以及具有相同重复次数的SSB索引进行升序排列,排序后的SSB索引为因此,在进行映射时,映射顺序为:SSB0→SSB4→SSB5→SSB1→SSB2→SSB3。◆Sort the repetition times of Msg1 corresponding to the six SSB indexes in descending order, and sort the SSB indexes with the same repetition times in ascending order. The sorted SSB indexes are Therefore, when mapping, the mapping order is: SSB0→SSB4→SSB5→SSB1→SSB2→SSB3.
◆该6个SSB索引各自对应的Msg1的重复次数中的最大值为8。因此,RO的时域资源索引为index 0~15等,其中,频域资源索引相同、且index 0~7所标识的时域资源所在的RO为一个RO组,频域资源索引相同、index 8~15所标识的时域资源所在的RO为另一个RO组,依次类推。也就是说,一个RO组包括8个RO的时域资源索引。◆The maximum value among the repetition times of Msg1 corresponding to the six SSB indexes is eight. Therefore, the time-domain resource indexes of ROs are index 0-15, etc. Among them, the ROs with the same frequency-domain resource indexes and the time-domain resources identified by index 0-7 are an RO group, and the frequency-domain resource indexes are the same, index 8 The RO where the time domain resource identified by ~15 is located is another RO group, and so on. That is to say, one RO group includes time-domain resource indexes of 8 ROs.
◆将该6个SSB索引,先在时域资源索引为index 0~7,且频域资源index最小的RO组上,即频域资源索引为index 0的RO组上,按照时域资源索引从小到大的顺序,在RO组中依次进行映射。接着,在时域资源索引为index 0~7,且频域资源索引最小的RO组中的RO全部映射完成后,增加频域资源索引,得到频域资源索引为index 1的RO组(即下一个RO组),然后按照时域资源索引从小到大的顺序继续在RO组中依次进行映射,以此类推。SSB索引对应的Msg1的重复次数在时域范围上打包进行映射。◆Index the 6 SSBs first on the RO group whose time domain resource index is index 0~7 and the frequency domain resource index is the smallest, that is, on the RO group whose frequency domain resource index is index 0, according to the time domain resource index from small To the big order, the mapping is performed sequentially in the RO group. Next, after all the ROs in the RO group whose time domain resource index is index 0 to 7 and whose frequency domain resource index is the smallest are all mapped, the frequency domain resource index is added to obtain the RO group whose frequency domain resource index is index 1 (that is, the following An RO group), and then continue to map in the RO group in sequence according to the order of the time domain resource index from small to large, and so on. The number of repetitions of Msg1 corresponding to the SSB index is packaged and mapped in the time domain.
◆将该6个SSB索引,在时域资源索引为index 0~7,频域资源索引增加到最大时的RO组上,即频域资源索引为index 3的RO组上,按照时域资源索引从小到大的顺序依次映射完成后,增加8个RO的时域资源索引以得到下一个RO组,即下一个RO组的时域资源索引为index 8~15,频域资源索引为index 0。同理,在时域资源索引为index 8~15,且频域资源索引为index 0的RO组上,按照时域资源索引从小到大的顺序,在RO组中依次进行映射。在时域资源索引为index 8~15,频域资源索引为index 0中的RO全部映射完成后,增加频域资源索引,得到频域资源索引为index 1的RO组(即下一个RO组),然后按照时域资源索引从小到大的顺序继续在RO组中依次进行映射,以此类推。SSB索引对应的Msg1的重复次数在时域范围上打包进行映射。
◆The 6 SSBs are indexed on the RO group when the time domain resource index is index 0~7, and the frequency domain resource index is increased to the maximum, that is, on the RO group whose frequency domain resource index is index 3, according to the time domain resource index After the mapping is completed in order from small to large, the time domain resource index of 8 ROs is added to obtain the next RO group, that is, the time domain resource index of the next RO group is index 8-15, and the frequency domain resource index is index 0. Similarly, on the RO group whose time-domain resource index is index 8-15 and whose frequency-domain resource index is index 0, the time-domain resource index is mapped in sequence in the RO group in ascending order of the time-domain resource index. After the time-domain resource index is index 8-15 and the frequency-domain resource index is index 0, all ROs are mapped, and the frequency-domain resource index is added to obtain the RO group whose frequency-domain resource index is index 1 (that is, the next RO group) , and then continue to map in the RO group sequentially in ascending order of the time-domain resource index, and so on. The number of repetitions of Msg1 corresponding to the SSB index is packaged and mapped in the time domain.
情形1:N<1Case 1: N<1
若N=1/2,则表示该6个SSB中的每个SSB映射到2个RO上。If N=1/2, it means that each of the 6 SSBs is mapped to 2 ROs.
具体映射细节如下:The specific mapping details are as follows:
1)映射SSB01) Map SSB0
按照映射顺序,先对SSB0进行映射。其中,SSB0对应的Msg1的重复次数(K0)为8。According to the mapping order, SSB0 is mapped first. Wherein, the repetition number (K 0 ) of Msg1 corresponding to SSB0 is 8.
在时域资源索引为index 0~7,频域资源索引最小的RO组上,即频域资源索引为index 0的RO组上,按照时域资源索引从小到大的顺序,依次映射SSB0对应的RO,并在频域资源索引最小的RO组中的RO全部映射完成后,增加频域资源索引,得到频域资源索引为index1的RO组,然后按照时域资源索引从小到大的顺序,依次映射SSB0对应的RO。On the RO group whose time-domain resource index is index 0-7 and the frequency-domain resource index is the smallest, that is, the RO group whose frequency-domain resource index is index 0, map the SSB0 corresponding to the time-domain resource index in ascending order. RO, and after all the ROs in the RO group with the smallest frequency domain resource index are mapped, increase the frequency domain resource index to obtain the RO group with the frequency domain resource index index1, and then follow the order of the time domain resource index from small to large, in order Map the RO corresponding to SSB0.
SSB0在频域资源索引为index 0的RO组上以8个RO打包整体映射。此时,SSB0映射该RO组中的8个RO,如图12所示。其中,图12中的虚线框内的8个RO为一个RO组,即时域资源索引为index 0~7,频域资源索引为index 0的RO组。SSB0 packages the overall mapping with 8 ROs on the RO group whose frequency domain resource index is index 0. At this time, SSB0 maps 8 ROs in the RO group, as shown in FIG. 12 . Among them, the 8 ROs in the dotted line box in Fig. 12 are an RO group, the resource index in the instant domain is index 0-7, and the resource index in the frequency domain is the RO group index 0.
由于N=1/2,因此SSB0需要映射到2个RO上。此时,将SSB0再次进行打包整体映射。Since N=1/2, SSB0 needs to be mapped to 2 ROs. At this time, SSB0 is packaged and mapped again.
另外,由于频域资源索引为index 0的RO组上已经映射了8个SSB0,因此增加频域资源索引进行映射,即在频域资源索引为index1的RO组上进行映射,如图13所示。其中,图13中的虚线框内的8个RO为增加频域资源索引后的一个RO组,即时域资源索引为index 0~7,频域资源索引为index1的RO组。In addition, since 8 SSB0s have been mapped to the RO group whose frequency domain resource index is index 0, the frequency domain resource index is added for mapping, that is, mapping is performed on the RO group whose frequency domain resource index is index1, as shown in Figure 13 . Among them, the 8 ROs in the dotted line box in Figure 13 are an RO group after adding frequency domain resource index, that is, the RO group with index 0-7 and frequency domain resource index index1.
2)映射SSB42) Mapping SSB4
按照映射顺序,在SSB0映射完成之后,接下来映射SSB4。其中,SSB4对应的Msg1的重复次数(K4)为4。According to the mapping order, after the SSB0 mapping is completed, SSB4 is mapped next. Wherein, the repetition number (K 4 ) of Msg1 corresponding to SSB4 is 4.
SSB4在频域资源索引为index 2的RO组上以4个RO打包整体映射,如图14所示。其中,图14中虚线框内的8个RO为增加频域资源索引后的一个RO组,即时域资源索引为index 0~7,频域资源索引为index 2的RO组。SSB4 packages the overall mapping with 4 ROs on the RO group whose frequency domain resource index is index 2, as shown in Figure 14. Among them, the 8 ROs in the dashed box in Figure 14 are an RO group after adding the frequency domain resource index, the instant domain resource index is index 0-7, and the frequency domain resource index is the RO group index 2.
由于N=1/2,因此SSB4需要映射到2个RO上。此时,将SSB4再次进行打包整体映射。Since N=1/2, SSB4 needs to be mapped to 2 ROs. At this point, SSB4 is packaged and mapped again.
另外,由于在频域资源索引为index 2的RO组上已经映射了4个SSB4,未映射满该RO组,因此继续在该RO组上进行映射,如图15所示。In addition, since 4 SSB4s have been mapped on the RO group whose frequency domain resource index is index 2, the RO group is not fully mapped, so continue to map on the RO group, as shown in Figure 15.
3)映射SSB53) Map SSB5
按照映射顺序,在SSB4映射完成之后,接下来映射SSB5。其中,SSB5对应的Msg1的重复次数(K5)为4。According to the mapping sequence, after the SSB4 mapping is completed, SSB5 is mapped next. Wherein, the repetition number (K 5 ) of Msg1 corresponding to SSB5 is 4.
SSB5在频域资源索引为index 3的RO组上以4个RO打包整体映射,如图16所示。其中,图16中虚线框内的8个RO为增加频域资源索引后的一个RO组,即时域资源索引为index 0~7,频域资源索引为index 3的RO组。SSB5 packages the overall mapping with 4 ROs on the RO group whose frequency domain resource index is index 3, as shown in Figure 16. Among them, the 8 ROs in the dotted box in Figure 16 are an RO group after adding the frequency domain resource index, the instant domain resource index is index 0-7, and the frequency domain resource index is the RO group index 3.
由于N=1/2,因此SSB5需要映射到2个RO上。Since N=1/2, SSB5 needs to be mapped to 2 ROs.
与上述类似,如图17所示。Similar to the above, as shown in Figure 17.
4)映射SSB14) Map SSB1
按照映射顺序,在SSB5映射完成之后,接下来映射SSB1。其中,SSB1对应的Msg1的重复次数(K1)为2。由于N=1/2,因此SSB1需要映射到2个RO上。According to the mapping sequence, after the SSB5 mapping is completed, SSB1 is mapped next. Wherein, the repetition number (K 1 ) of Msg1 corresponding to SSB1 is 2. Since N=1/2, SSB1 needs to be mapped to 2 ROs.
由于时域资源索引为index 0~7,频域资源索引为index 3的RO组映射完成,因此按照时域资源索引从小到大的顺序,增加时域资源索引,再次以8个RO的时域资源索引为粒度划分RO组进行映射,如图18所示。其中,图18中的虚线框内的8个RO为增加时域资源索引后的一个RO组,即时域资源索引为index 8~15,频域资源索引为index 0的RO组。Since the time domain resource index is index 0 to 7, and the frequency domain resource index is index 3, the RO group mapping is completed, so the time domain resource index is increased according to the order of the time domain resource index from small to large, and the time domain resource index of 8 ROs is used again. The resource index is mapped to the granularity-divided RO group, as shown in Figure 18. Among them, the 8 ROs in the dotted box in Figure 18 are an RO group after adding the time domain resource index, the time domain resource index is index 8-15, and the frequency domain resource index is the RO group index 0.
与上述类似,如图19所示。Similar to the above, as shown in Figure 19.
5)映射SSB25) Map SSB2
按照映射顺序,在SSB1映射完成之后,接下来映射SSB2。其中,SSB2对应的Msg1的重复次数(K2)为2。由于N=1/2,因此SSB2需要映射到2个RO上。According to the mapping sequence, after the SSB1 mapping is completed, SSB2 is mapped next. Wherein, the repetition number (K 2 ) of Msg1 corresponding to SSB2 is 2. Since N=1/2, SSB2 needs to be mapped to 2 ROs.
与上述类似,如图20所示。其中,图20中虚线框内的8个RO为一个RO组,即时域资源索引为index 8~15,频域资源索引为index 0的RO组。Similar to the above, as shown in Figure 20. Among them, the 8 ROs in the dotted line box in Figure 20 are an RO group, the resource index in the real-time domain is index 8-15, and the resource index in the frequency domain is an RO group with index 0.
与上述类似,如图21所示。Similar to the above, as shown in Figure 21.
5)映射SSB35) Map SSB3
按照映射顺序,在SSB2映射完成之后,接下来映射SSB3。其中,SSB3对应的Msg1的重复次数(K3)为2。由于N=1/2,因此SSB3需要映射到2个RO上。
According to the mapping sequence, after the SSB2 mapping is completed, SSB3 is mapped next. Wherein, the repetition number (K 3 ) of Msg1 corresponding to SSB3 is 2. Since N=1/2, SSB3 needs to be mapped to 2 ROs.
与上述类似,如图22所示。其中,图22中虚线框内的8个RO为增加频域资源索引后的一个RO组,即时域资源索引为index 8~15,频域资源索引为index 1的RO组。Similar to the above, as shown in Figure 22. Among them, the 8 ROs in the dashed box in Figure 22 are an RO group after adding the frequency domain resource index, the instant domain resource index is index 8-15, and the frequency domain resource index is the RO group index 1.
与上述类似,如图23所示。Similar to the above, as shown in Figure 23.
至此,该6个SSB索引映射完成。So far, the six SSB index mappings are completed.
情形2:N=1Case 2: N=1
若N=1,则表示该6个SSB中的每个SSB映射到1个RO上。If N=1, it means that each of the six SSBs is mapped to one RO.
具体映射细节如下:The specific mapping details are as follows:
1)映射SSB01) Map SSB0
按照映射顺序,先对SSB0进行映射。其中,SSB0对应的Msg1的重复次数(K0)为8。由于N=1,因此SSB0需要映射到1个RO上。According to the mapping order, SSB0 is mapped first. Wherein, the repetition number (K 0 ) of Msg1 corresponding to SSB0 is 8. Since N=1, SSB0 needs to be mapped to one RO.
在时域资源索引为index 0~7,频域资源索引最小的RO组上,即频域资源索引为index0的RO组上,按照时域资源索引从小到大的顺序,依次映射SSB0对应的RO。On the RO group whose time-domain resource index is index 0-7 and the frequency-domain resource index is the smallest, that is, the RO group whose frequency-domain resource index is index0, map the ROs corresponding to SSB0 in order of time-domain resource index from small to large .
SSB0在时域上以8个RO打包整体映射,如图12所示。SSB0 is mapped as a whole in 8 RO packages in the time domain, as shown in Figure 12.
2)映射SSB42) Mapping SSB4
按照映射顺序,在SSB0映射完成之后,接下来映射SSB4。其中,SSB4对应的Msg1的重复次数(K4)为4。由于N=1,因此SSB4需要映射到1个RO上,如图24所示。其中,图24中的虚线框内的8个RO为增加频域资源索引后的一个RO组,即时域资源索引为index 0~7,频域资源索引为index1的RO组。According to the mapping order, after the SSB0 mapping is completed, SSB4 is mapped next. Wherein, the repetition number (K 4 ) of Msg1 corresponding to SSB4 is 4. Since N=1, SSB4 needs to be mapped to one RO, as shown in FIG. 24 . Among them, the 8 ROs in the dotted line box in FIG. 24 are an RO group after adding frequency domain resource index, that is, the RO group with index 0-7 and frequency domain resource index index1.
3)映射SSB53) Map SSB5
按照映射顺序,在SSB4映射完成之后,接下来映射SSB5。其中,SSB5对应的Msg1的重复次数(K5)为4。由于N=1,因此SSB5需要映射到1个RO上。According to the mapping sequence, after the SSB4 mapping is completed, SSB5 is mapped next. Wherein, the repetition number (K 5 ) of Msg1 corresponding to SSB5 is 4. Since N=1, SSB5 needs to be mapped to one RO.
在映射SSB5时,与上述类似,如图25所示。When mapping SSB5, it is similar to the above, as shown in Figure 25.
4)映射SSB14) Map SSB1
按照映射顺序,在SSB5映射完成之后,接下来映射SSB1。其中,SSB1对应的Msg1的重复次数(K1)为2。由于N=1,因此SSB1需要映射到1个RO上。According to the mapping sequence, after the SSB5 mapping is completed, SSB1 is mapped next. Wherein, the repetition number (K 1 ) of Msg1 corresponding to SSB1 is 2. Since N=1, SSB1 needs to be mapped to one RO.
在映射SSB1时,与上述类似,如图26所示。其中,图26中的虚线框内的8个RO为增加频域资源索引后的一个RO组,即时域资源索引为index 0~7,频域资源索引为index 2的RO组。When mapping SSB1, it is similar to the above, as shown in Figure 26. Among them, the 8 ROs in the dotted box in Figure 26 are an RO group after adding the frequency domain resource index, the instant domain resource index is index 0-7, and the frequency domain resource index is the RO group index 2.
5)映射SSB25) Map SSB2
按照映射顺序,在SSB1映射完成之后,接下来映射SSB2。其中,SSB2对应的Msg1的重复次数(K2)为2。由于N=1,因此SSB2需要映射到1个RO上。According to the mapping sequence, after the SSB1 mapping is completed, SSB2 is mapped next. Wherein, the repetition number (K 2 ) of Msg1 corresponding to SSB2 is 2. Since N=1, SSB2 needs to be mapped to one RO.
在映射SSB2时,与上述类似,如图27所示。When mapping SSB2, it is similar to the above, as shown in Figure 27.
5)映射SSB35) Map SSB3
按照映射顺序,在SSB2映射完成之后,接下来映射SSB3。其中,SSB3对应的Msg1的重复次数(K3)为2。由于N=1,因此SSB3需要映射到1个RO上。According to the mapping sequence, after the SSB2 mapping is completed, SSB3 is mapped next. Wherein, the repetition number (K 3 ) of Msg1 corresponding to SSB3 is 2. Since N=1, SSB3 needs to be mapped to one RO.
在映射SSB3时,与上述类似,如图28所示。When mapping SSB3, it is similar to the above, as shown in Figure 28.
至此,该6个SSB索引映射完成。So far, the six SSB index mappings are completed.
情形3:N>1Case 3: N>1
若N=2,则表示该6个SSB中的每2个SSB映射到1个RO上。If N=2, it means that every 2 SSBs in the 6 SSBs are mapped to 1 RO.
结合上述“①当N>1时,SSB索引的映射规则”中的内容,除了需要实现上述之外,还需要实现如下:Combined with the content in the above "①When N>1, SSB index mapping rules", in addition to the above, it is also necessary to implement the following:
◆每2个SSB索引各自所映射的RO存在相同和/或不相同。◆The ROs mapped to each of the two SSB indexes are the same or different.
◆若有2个SSB索引各自所映射的RO存在相同,则该2个SSB索引以相同RO中的RA preamble index进行区分。◆If there are two SSB indexes that map to the same RO, then the two SSB indexes are distinguished by the RA preamble index in the same RO.
具体映射细节如下:The specific mapping details are as follows:
1)映射SSB0和SSB41) Map SSB0 and SSB4
按照映射顺序,先对SSB0和SSB4进行映射。其中,SSB0对应的Msg1的重复次数(K0)为8,SSB4对应的Msg1的重复次数(K4)为4。According to the mapping order, SSB0 and SSB4 are mapped first. Wherein, the repetition number (K 0 ) of Msg1 corresponding to SSB0 is 8, and the repetition number (K 4 ) of Msg1 corresponding to SSB4 is 4.
在时域资源索引为index 0~7,频域资源索引最小的RO组上,即频域资源索引为index 0的RO组上,按照时域资源索引从小到大的顺序依次映射SSB0和SSB4对应的RO。On the RO group whose time-domain resource index is index 0-7 and the frequency-domain resource index is the smallest, that is, on the RO group whose frequency-domain resource index is index 0, map SSB0 and SSB4 correspondingly according to the order of time-domain resource index from small to large the RO.
如图29所示,在时域资源索引为index 0~7,频域资源索引为index 0的RO组中,时域资源索引为index 0~3的RO上均映射SSB0和SSB4,并以RA preamble index进行区分。其中,SSB0所关联的
RA preamble index从0~31,而SSB4所关联的RA preamble index从32~63。As shown in Figure 29, in the RO group whose time-domain resource index is index 0-7 and frequency-domain resource index is index 0, SSB0 and SSB4 are mapped to ROs whose time-domain resource index is index 0-3, and RA preamble index to distinguish. Among them, SSB0 is associated with The RA preamble index ranges from 0 to 31, and the RA preamble index associated with SSB4 ranges from 32 to 63.
在时域资源索引为index 4~7的RO上均只映射SSB0,并且该index 4~7的RO上所映射的SSB0关联的RA preamble index从0~31,而剩下的RA preamble index不进行映射。Only SSB0 is mapped on ROs with time domain resource indexes index 4~7, and the RA preamble index associated with SSB0 mapped on the ROs with index 4~7 is from 0~31, and the remaining RA preamble indexes are not performed. map.
2)映射SSB5和SSB12) Map SSB5 and SSB1
按照映射顺序,在SSB0和SSB4映射完成之后,接下来映射SSB5和SSB1。其中,SSB5对应的Msg1的重复次数(K5)为4,SSB1对应的Msg1的重复次数(K1)为2。According to the mapping order, after SSB0 and SSB4 are mapped, SSB5 and SSB1 are mapped next. Wherein, the repetition number (K 5 ) of Msg1 corresponding to SSB5 is 4, and the repetition number (K 1 ) of Msg1 corresponding to SSB1 is 2.
由于时域资源索引为index 0~7,频域资源索引为index 0的RO组上的RO已经映射完,因此增加频域资源索引进行映射。选取时域资源索引为index 0~7,频域资源索引为index 1的RO组中的前4个RO,即时域资源索引为index 0~3的RO,将SSB5和SSB1进行映射,如图30所示。Since the time domain resource index is index 0 to 7, and the RO on the RO group whose frequency domain resource index is index 0 has been mapped, the frequency domain resource index is added for mapping. Select the first 4 ROs in the RO group whose time domain resource index is index 0-7, the frequency domain resource index is index 1, and the RO group whose real-time resource index is 0-3, and map SSB5 and SSB1, as shown in Figure 30 shown.
在RO组中,时域资源索引为index 0~1的RO上均映射SSB5和SSB1,并以RA preamble index进行区分。其中,SSB5所关联的RA preamble index从0~31,而SSB1所关联的RA preamble index从32~63。In the RO group, SSB5 and SSB1 are mapped to ROs with time-domain resource indexes index 0 to 1, and are distinguished by RA preamble index. Among them, the RA preamble index associated with SSB5 is from 0 to 31, and the RA preamble index associated with SSB1 is from 32 to 63.
在时域资源索引为index 2~3的RO上均只映射SSB5,并且该index 2~3的RO上所映射的SSB5关联的RA preamble index从0~31,而剩下的RA preamble index不进行映射。Only SSB5 is mapped on ROs with time domain resource indexes index 2~3, and the RA preamble index associated with SSB5 mapped on the ROs with index 2~3 is from 0~31, and the remaining RA preamble indexes are not performed. map.
3)映射SSB2和SSB33) Map SSB2 and SSB3
按照映射顺序,在SSB5和SSB1映射完成之后,接下来映射SSB2和SSB3。其中,SSB2对应的Msg1的重复次数(K2)为2,SSB3对应的Msg1的重复次数(K3)为2。According to the mapping sequence, after the mapping of SSB5 and SSB1 is completed, SSB2 and SSB3 are mapped next. Wherein, the repetition number (K 2 ) of Msg1 corresponding to SSB2 is 2, and the repetition number (K 3 ) of Msg1 corresponding to SSB3 is 2.
选取时域资源索引为index 0~7,频域资源索引为index1的RO组中的2个RO,即时域资源索引为index 4~5的RO,将SSB2和SSB3进行映射,如图31所示。其中,SSB2所关联的RA preamble index从0~31,而SSB3所关联的RA preamble index从32~63。Select two ROs in the RO group whose time-domain resource index is index 0-7, frequency-domain resource index is index1, and ROs whose time-domain resource index is index 4-5, and map SSB2 and SSB3, as shown in Figure 31 . Among them, the RA preamble index associated with SSB2 is from 0 to 31, and the RA preamble index associated with SSB3 is from 32 to 63.
至此,该6个SSB索引映射完成。So far, the six SSB index mappings are completed.
举例2:Example 2:
如图32所示,卫星3210发送的信号在小区中至少有6个波束,即波束3221、波束3222、波束3223、波束3224、波束3225和波束3226。其中,该6各自对应一个SSB,即波束3221对应SSB0、波束3222对应SSB1、波束3223对应SSB2、波束3224对应SSB3、波束3225对应SSB4、波束3226对应SSB5。As shown in FIG. 32 , the signal sent by the satellite 3210 has at least 6 beams in the cell, that is, the beam 3221 , the beam 3222 , the beam 3223 , the beam 3224 , the beam 3225 and the beam 3226 . Among them, each of the 6 corresponds to one SSB, that is, beam 3221 corresponds to SSB0, beam 3222 corresponds to SSB1, beam 3223 corresponds to SSB2, beam 3224 corresponds to SSB3, beam 3225 corresponds to SSB4, and beam 3226 corresponds to SSB5.
网络设备通过***信息为该6个波束各自配置一个Msg1的重复次数(Ki),并将对应相同Msg1的重复次数的SSB索引划分为一组以得到3个SSB组,即其中,SSB组0(SSB Group0)包括SSB0,SSB组1(SSB Group1)包括SSB1、SSB2和SSB3,SSB组2(SSB Group2)包括SSB4和SSB5,SSB组0对应的Msg1的重复次数为8,SSB组1对应的Msg1的重复次数为2,SSB组2对应的Msg1的重复次数为4。The network device configures a Msg1 repetition number (K i ) for each of the six beams through system information, and divides the SSB indexes corresponding to the same Msg1 repetition number into one group to obtain three SSB groups, namely Among them, SSB Group 0 (SSB Group 0 ) includes SSB0, SSB Group 1 (SSB Group 1 ) includes SSB1, SSB2 and SSB3, SSB Group 2 (SSB Group 2 ) includes SSB4 and SSB5, and the repetition times of Msg1 corresponding to SSB Group 0 The number of repetitions of Msg1 corresponding to SSB group 1 is 2, and the number of repetitions of Msg1 corresponding to SSB group 2 is 4.
以网络设备通过高层参数(如该高层参数为参数SSB-per-rach-occasion)为终端设备配置N,通过高层参数(如该高层参数为参数prach-ConfigurationIndex)为终端设备配置的RO的时域资源索引分别为index 0、index 1、index 2、index 3、index 4、index 5、index 6、index 7、index 8、index 9、index 10、index 11、index 12、index 13、index 14、index 15、……,以及通过高层参数(如该高层参数为参数msg1-FDM=4)配置RO的频域资源的索引为index 0、index 1、index 2、index 3。当3个SSB组中的SSB与RO进行映射时,具体实现如下:The network device configures N for the terminal device through the high-level parameter (such as the high-level parameter is the parameter SSB-per-rach-occasion), and configures the RO time domain for the terminal device through the high-level parameter (such as the high-level parameter is the parameter prach-ConfigurationIndex) The resource indexes are index 0, index 1, index 2, index 3, index 4, index 5, index 6, index 7, index 8, index 9, index 10, index 11, index 12, index 13, index 14, index 15. ..., and configure the indices of the frequency domain resources of the RO through high-level parameters (such as the parameter msg1-FDM=4) to be index 0, index 1, index 2, and index 3. When the SSB and RO in the three SSB groups are mapped, the specific implementation is as follows:
◆将该3个SSB组各自对应的Msg1的重复次数进行降序排序,以及同一SSB组中的SSB索引进行升序排列,排序后的SSB组中的SSB索引为因此,在进行映射时,映射顺序为:SSB组0→SSB组2→SSB组1。◆Sort the repetition times of Msg1 corresponding to each of the three SSB groups in descending order, and sort the SSB indexes in the same SSB group in ascending order, and the SSB indexes in the sorted SSB group are Therefore, during mapping, the mapping order is: SSB group 0 → SSB group 2 → SSB group 1 .
◆该3个SSB组各自对应的Msg1的重复次数中的最大值为8。因此,依次以RO的时域资源索引分别为index 0~15等,其中,频域资源索引相同、且index0~7所标识的时域资源所在的RO为一个RO组,频域资源索引相同、index8~15所标识的时域资源所在的RO为另一个RO组,依次类推。也就是说,一个RO组包括8个RO的时域资源索引。◆The maximum value of the repetition times of Msg1 corresponding to each of the three SSB groups is 8. Therefore, the time-domain resource indexes of ROs are respectively index 0-15, etc., wherein the ROs with the same frequency-domain resource indexes and the time-domain resources identified by index 0-7 are an RO group, and the frequency-domain resource indexes are the same, The RO where the time-domain resources identified by index 8-15 are located is another RO group, and so on. That is to say, one RO group includes time-domain resource indexes of 8 ROs.
◆将该3个SSB组中的SSB索引,先在时域资源索引为index 0~7,频域资源索引最小的RO组上,即频域资源索引为index 0的RO组上,按照时域资源索引从小到大的顺序,在RO组中依次进行映射。接着,在时域资源索引为index 0~7,频域资源索引最小的RO组中的RO
全部映射完成后,增加频域资源索引,得到频域资源索引为index 1的RO组(即下一个RO组),然后按照时域资源索引从小到大的顺序继续在RO组中依次进行映射,以此类推。SSB索引对应的Msg1的重复次数在时域范围上打包进行映射。◆The SSB indexes in the three SSB groups are firstly indexed on the RO group whose resource index in the time domain is index 0 to 7 and the resource index in the frequency domain is the smallest, that is, the RO group whose resource index in the frequency domain is index 0. Resource indexes are mapped sequentially in the RO group in ascending order. Next, in the RO group whose resource index in the time domain is index 0-7 and the resource index in the frequency domain is the smallest After all the mapping is completed, increase the frequency domain resource index to obtain the RO group with the frequency domain resource index index 1 (that is, the next RO group), and then continue to map in the RO group in order of the time domain resource index from small to large, and so on. The number of repetitions of Msg1 corresponding to the SSB index is packaged and mapped in the time domain.
◆将该3个SSB组中的SSB索引,在时域资源索引为index 0~7,频域资源索引增加到最大时的RO组上,即频域资源索引为index 3的RO组上,按照时域资源索引从小到大的顺序依次映射完成后,增加8个RO的时域资源索引以得到RO组,即RO组的时域资源索引为index8~15,以及RO组的频域资源索引为index 0。同理,在时域资源索引为index 8~15,频域资源索引为index 0的RO组上,按照时域资源索引从小到大的顺序,在RO组中依次进行映射。在时域资源索引为index 8~15,频域资源索引为index 0中的RO全部映射完成后,增加频域资源索引,得到频域资源索引为index 1的RO组,然后按照时域资源索引从小到大的顺序继续在RO组中依次进行映射,以此类推。SSB索引对应的Msg1的重复次数在时域范围上打包进行映射。◆The SSB index in the three SSB groups is on the RO group when the time domain resource index is index 0~7 and the frequency domain resource index is increased to the maximum, that is, the RO group with the frequency domain resource index being index 3, according to After the time-domain resource indexes are mapped in order from small to large, add 8 RO time-domain resource indexes to obtain the RO group, that is, the time-domain resource indexes of the RO group are index8-15, and the frequency-domain resource indexes of the RO group are index 0. Similarly, on the RO group whose time-domain resource index is index 8-15 and frequency-domain resource index is index 0, the time-domain resource index is mapped in the RO group in order from small to large. After the time-domain resource index is index 8-15, and the frequency-domain resource index is index 0, after all the ROs in the frequency-domain resource index are mapped, add the frequency-domain resource index to obtain the RO group with the frequency-domain resource index as index 1, and then follow the time-domain resource index The sequence from small to large continues to be mapped in the RO group, and so on. The number of repetitions of Msg1 corresponding to the SSB index is packaged and mapped in the time domain.
情形1:N<1Case 1: N<1
若N=1/2,则表示该3个SSB组中的每个SSB映射到2个RO上。If N=1/2, it means that each SSB in the 3 SSB groups is mapped to 2 ROs.
1)映射SSB组0中的SSB01) Map SSB0 in SSB group 0
与上述“举例1”类似,如图12和图13所示。Similar to the above "Example 1", as shown in Figure 12 and Figure 13.
2)映射SSB组2中的SSB42) Map SSB4 in SSB Group 2
与上述“举例1”类似,如图14和图15所示。Similar to the above "Example 1", as shown in Figure 14 and Figure 15.
3)映射SSB组2中的SSB53) Map SSB5 in SSB Group 2
与上述“举例1”类似,如图16和图17所示。Similar to the above "Example 1", as shown in Figure 16 and Figure 17.
4)映射SSB组1中的SSB14) Map SSB1 in SSB Group 1
与上述“举例1”类似,如图18和图19所示。Similar to the above "Example 1", as shown in Figure 18 and Figure 19.
5)映射SSB组1中的SSB25) Map SSB2 in SSB Group 1
与上述“举例1”类似,如图20和图21所示。Similar to the above "Example 1", as shown in Figure 20 and Figure 21.
6)映射SSB组1中的SSB36) Map SSB3 in SSB Group 1
与上述“举例1”类似,如图22和图23所示。Similar to the above "Example 1", as shown in Figure 22 and Figure 23.
至此,该6个SSB索引映射完成。So far, the six SSB index mappings are completed.
情形2:N=1Case 2: N=1
若N=1,则表示该3个SSB组中的每个SSB映射到1个RO上。If N=1, it means that each SSB in the three SSB groups is mapped to one RO.
具体映射细节如下:The specific mapping details are as follows:
1)映射SSB组0中的SSB01) Map SSB0 in SSB group 0
与上述“举例1”类似,如图12所示。Similar to the above "Example 1", as shown in Figure 12.
2)映射SSB组2中的SSB42) Map SSB4 in SSB Group 2
与上述“举例1”类似,如图24所示。Similar to the above "Example 1", as shown in Figure 24.
3)映射SSB组2中的SSB53) Map SSB5 in SSB Group 2
与上述“举例1”类似,如图25所示。Similar to the above "Example 1", as shown in Figure 25.
4)映射SSB组1中的SSB14) Map SSB1 in SSB Group 1
与上述“举例1”类似,如图26所示。Similar to the above "Example 1", as shown in Figure 26.
5)映射SSB组1中的SSB25) Map SSB2 in SSB Group 1
与上述“举例1”类似,如图27所示。Similar to the above "Example 1", as shown in Figure 27.
6)映射SSB组1中的SSB36) Map SSB3 in SSB Group 1
与上述“举例1”类似,如图28所示。Similar to the above "Example 1", as shown in Figure 28.
至此,该6个SSB索引映射完成。So far, the six SSB index mappings are completed.
情形3:N>1Case 3: N>1
若N=2,则表示每个SSB组中的2个SSB映射到1个RO上。If N=2, it means that 2 SSBs in each SSB group are mapped to 1 RO.
结合上述“当N>1时,SSB索引的映射规则”中的内容,除了需要实现上述之外,还需要实现如下:◆每个SSB组中的2个SSB索引各自所映射的RO存在相同。Combined with the content in the above "When N>1, SSB Index Mapping Rules", in addition to the above, the following needs to be implemented: ◆The ROs mapped by the two SSB indexes in each SSB group are the same.
◆每个SSB组中的2个SSB索引以相同RO中的RA preamble index进行区分。◆The two SSB indexes in each SSB group are distinguished by the RA preamble index in the same RO.
具体映射细节如下:The specific mapping details are as follows:
1)映射SSB组0中的SSB01) Map SSB0 in SSB group 0
按照映射顺序,先对SSB组0进行映射。其中,SSB组0对应的Msg1的重复次数(K0)为8。
According to the mapping order, SSB group 0 is mapped first. Wherein, the number of repetitions (K 0 ) of Msg1 corresponding to SSB group 0 is 8.
在时域资源索引为index 0~7,频域资源索引最小的RO组上,即频域资源索引为index 0的RO组上,按照时域资源索引从小到大的顺序依次映射SSB组0中的SSB0。由于SSB组0只包括1个SSB索引,因此SSB0在映射时只占用前32个RA preamble,剩下的RA preamble不进行映射,如图33所示。On the RO group whose time domain resource index is index 0 to 7 and the frequency domain resource index is the smallest, that is, on the RO group whose frequency domain resource index is index 0, the SSB group 0 is mapped in sequence according to the order of the time domain resource index from small to large SSB0. Since SSB group 0 only includes one SSB index, SSB0 only occupies the first 32 RA preambles during mapping, and the remaining RA preambles are not mapped, as shown in Figure 33.
2)映射SSB组2中的SSB4和SSB52) Map SSB4 and SSB5 in SSB Group 2
按照映射顺序,在映射完SSB组0之后,继续映射SSB组2。其中,SSB组2对应的Msg1的重复次数(K2)为4。According to the mapping order, after mapping SSB group 0, continue to map SSB group 2. Wherein, the number of repetitions (K 2 ) of Msg1 corresponding to SSB group 2 is 4.
由于时域资源索引为index 0~7,频域资源索引为index 0的RO组上的RO已经映射完,因此增加频域资源索引进行映射。选取时域资源索引为index 0~7,频域资源索引为index 1的RO组中的前4个RO,即时域资源索引为index 0~3的RO,按照时域资源索引从小到大的顺序依次映射SSB组2中的SSB4和SSB5,并以RA preamble index进行区分,如图34所示。其中,SSB4所关联的RA preamble index从0~31,而SSB5所关联的RA preamble index从32~63。Since the time domain resource index is index 0 to 7, and the RO on the RO group whose frequency domain resource index is index 0 has been mapped, the frequency domain resource index is added for mapping. Select the first 4 ROs in the RO group whose time-domain resource index is index 0-7, the frequency-domain resource index is index 1, and the ROs whose time-domain resource index is index 0-3, according to the order of the time-domain resource index from small to large Map SSB4 and SSB5 in SSB group 2 in turn, and distinguish them by RA preamble index, as shown in Figure 34. Among them, the RA preamble index associated with SSB4 is from 0 to 31, and the RA preamble index associated with SSB5 is from 32 to 63.
3)映射SSB组1中的SSB1和SSB23) Map SSB1 and SSB2 in SSB Group 1
按照映射顺序,在映射完SSB组2之后,继续映射SSB组1。其中,SSB组1对应的Msg1的重复次数(K1)为2。According to the mapping sequence, after mapping SSB group 2, continue to map SSB group 1. Wherein, the repetition number (K 1 ) of Msg1 corresponding to SSB group 1 is 2.
选取时域资源索引为index 0~7,频域资源索引为index1的RO组中的2个RO,即时域资源索引为index 4~5的RO,按照时域资源索引从小到大的顺序依次映射SSB组1中的SSB1和SSB2,并以RA preamble index进行区分,如图35所示。其中,SSB1所关联的RA preamble index从0~31,而SSB2所关联的RA preamble index从32~63。Select two ROs in the RO group whose time-domain resource index is index 0-7, frequency-domain resource index is index1, and real-time domain resource index is index 4-5 ROs, and map in order of time-domain resource index from small to large SSB1 and SSB2 in SSB group 1 are distinguished by RA preamble index, as shown in Figure 35. Among them, the RA preamble index associated with SSB1 is from 0 to 31, and the RA preamble index associated with SSB2 is from 32 to 63.
4)映射SSB组1中的SSB34) Map SSB3 in SSB Group 1
按照映射顺序,在映射完SSB1和SSB2之后,继续映射SSB3。其中,SSB组1对应的Msg1的重复次数(K1)为2。According to the mapping sequence, after mapping SSB1 and SSB2, continue to map SSB3. Wherein, the repetition number (K 1 ) of Msg1 corresponding to SSB group 1 is 2.
选取时域资源索引为index 0~7,频域资源索引为index1的RO组中的2个RO,即时域资源索引为index 6~7的RO,按照时域资源索引从小到大的顺序依次映射SSB组1中的SSB3,而SSB3在映射时只占用前32个RA preamble,剩下的RA preamble不进行映射,如图36所示。Select two ROs in the RO group whose time-domain resource index is index 0-7, frequency-domain resource index is index1, and real-time domain resource index is index 6-7 ROs, and map in order of time-domain resource index from small to large SSB3 in SSB group 1, and SSB3 only occupies the first 32 RA preambles during mapping, and the remaining RA preambles are not mapped, as shown in Figure 36.
至此,该6个SSB索引映射完成。So far, the six SSB index mappings are completed.
举例3:Example 3:
如图37所示,卫星3710发送的信号在小区中至少形成3个波束,即波束3721、波束3722和波束3723。其中,该3个波束各自对应一个SSB,即波束3721对应SSB0、波束3722对应SSB1和波束3723对应SSB2。此时,小区中至少有3个SSB索引。As shown in FIG. 37 , the signal sent by the satellite 3710 forms at least three beams in the cell, that is, a beam 3721 , a beam 3722 and a beam 3723 . Wherein, each of the three beams corresponds to one SSB, that is, beam 3721 corresponds to SSB0, beam 3722 corresponds to SSB1, and beam 3723 corresponds to SSB2. At this time, there are at least 3 SSB indexes in the cell.
网络设备通过***信息为该3个SSB索引各自配置Msg1的重复次数(Ki),即
The network device configures the repetition times (K i ) of Msg1 for each of the three SSB indexes through the system information, that is,
以网络设备通过高层参数(如该高层参数为参数SSB-per-rach-occasion)为终端设备配置N,通过高层参数(如该高层参数为参数prach-ConfigurationIndex)为终端设备配置的RO的时域资源索引分别为index 0、index 1、index 2、index 3、index 4、index 5、index 6、index 7、index 8、index 9、index 10、index 11、index 12、index 13、index 14、index 15、……,以及通过高层参数(如该高层参数为参数msg1-FDM=1)配置一个RO的时域资源索引上有1个频域资源为index 0。The network device configures N for the terminal device through the high-level parameter (such as the high-level parameter is the parameter SSB-per-rach-occasion), and configures the RO time domain for the terminal device through the high-level parameter (such as the high-level parameter is the parameter prach-ConfigurationIndex) The resource indexes are index 0, index 1, index 2, index 3, index 4, index 5, index 6, index 7, index 8, index 9, index 10, index 11, index 12, index 13, index 14, index 15. ..., and configure a time-domain resource index of an RO through a high-level parameter (for example, the high-level parameter is the parameter msg1-FDM=1), and there is a frequency domain resource index 0 on it.
当该3个SSB索引与RO进行映射时,具体实现如下:When the three SSB indexes are mapped to the RO, the specific implementation is as follows:
◆对该3个SSB索引各自对应的Msg1的重复次数进行降序排序,以及具有相同重复次数的SSB索引进行升序排列,排序后的SSB索引为因此,在进行映射时,映射顺序为:SSB0→SSB2→SSB1。◆Sort the repetition times of Msg1 corresponding to the three SSB indexes in descending order, and sort the SSB indexes with the same repetition times in ascending order. The sorted SSB indexes are Therefore, when mapping, the mapping order is: SSB0→SSB2→SSB1.
◆该3个SSB索引各自对应的Msg1的重复次数中的最大值为4。因此,依次以RO的时域资源索引分别为index 0~15,其中,频域资源索引相同、且index0~3所标识的时域资源所在的RO为一个RO组,频域资源索引相同、index4~7所标识的时域资源所在的RO为一个RO组,频域资源索引相同、index8~11所标识的时域资源所在的RO为一个RO组,频域资源索引相同、index12~15所标识的时域资源所在的RO为一个RO组,依次类推。也就是说,一个RO组包括4个RO的时域资源索引。◆The maximum value among the repetition times of Msg1 corresponding to the three SSB indexes is four. Therefore, the time-domain resource indexes of ROs are respectively index 0-15, among which, the ROs with the same frequency-domain resource indexes and the time-domain resources identified by index0-3 are an RO group, and the frequency-domain resource indexes are the same, index4 The ROs where the time-domain resources identified by ~7 are an RO group, the frequency-domain resource indexes are the same, and the ROs where the time-domain resources identified by indexes 8-11 are located are an RO group, the frequency-domain resource indexes are the same, and the ROs identified by indexes 12-15 The RO where the time-domain resource of the resource is located is an RO group, and so on. That is to say, one RO group includes time-domain resource indexes of four ROs.
◆将该3个SSB索引,先在时域资源索引为index 0~3,频域资源索引为index0的RO组上,按照时域资源索引从小到大的顺序,在RO组中依次进行映射。接着,在该RO组中的RO
全部映射完成后,增加时域资源index,得到时域资源索引为index 4~7,频域资源索引为index0的RO组,按照时域资源索引从小到大的顺序继续在RO组中依次进行映射,以此类推。◆The three SSB indexes are first mapped on the RO group whose time-domain resource index is index 0~3 and frequency-domain resource index is index0, and are mapped in the RO group according to the order of time-domain resource index from small to large. Next, the ROs in the RO group After all the mapping is completed, add the time domain resource index to get the RO group whose time domain resource index is index 4~7 and frequency domain resource index is index0, and continue to map in the RO group in order of time domain resource index from small to large , and so on.
情形1:N<1Case 1: N<1
若N=1/2,则表示该3个SSB中的每个SSB映射到2个RO上。If N=1/2, it means that each of the 3 SSBs is mapped to 2 ROs.
具体映射细节如下:The specific mapping details are as follows:
1)映射SSB01) Map SSB0
按照映射顺序,先对SSB0进行映射。其中,SSB0对应的Msg1的重复次数(K0)为4。According to the mapping order, SSB0 is mapped first. Wherein, the repetition number (K 0 ) of Msg1 corresponding to SSB0 is 4.
在时域资源索引为index 0~3,频域资源索引为index 0的RO组上,按照时域资源索引从小到大的顺序,依次映射SSB0对应的RO,并在该RO组中的RO全部映射完成后,增加时域资源index,得到时域资源索引为index 4~7,频域资源索引为index 0的RO组,按照时域资源index从小到大的顺序,依次映射SSB0对应的RO。On the RO group whose time-domain resource index is index 0-3 and frequency-domain resource index is index 0, the ROs corresponding to SSB0 are mapped in sequence according to the order of the time-domain resource index from small to large, and all ROs in the RO group After the mapping is complete, add the time domain resource index to get the RO group whose time domain resource index is index 4 to 7 and frequency domain resource index is 0, and map the ROs corresponding to SSB0 in order of time domain resource index from small to large.
SSB0在频域资源索引为index 0的RO组上以4个RO打包整体映射。此时,SSB0映射该RO组中的4个RO,如图38所示。其中,图38虚线框内的4个RO为一个RO组,即时域资源索引为index 0~3,频域资源索引为index0的RO组。SSB0 packages the overall mapping with 4 ROs on the RO group whose frequency domain resource index is index 0. At this time, SSB0 maps the four ROs in the RO group, as shown in Figure 38. Among them, the four ROs in the dotted line box in Figure 38 are an RO group, the resource index in the real-time domain is index 0-3, and the resource index in the frequency domain is the RO group index0.
由于N=1/2,因此SSB0需要映射到2个RO上。此时,将SSB0再次进行打包整体映射。Since N=1/2, SSB0 needs to be mapped to 2 ROs. At this time, SSB0 is packaged and mapped again.
另外,由于时域资源索引为index 0~3,频域资源索引为index 0的RO组上已经映射了4个SSB0,高层参数(如参数msg1-FDM=1)配置一个RO的时域资源索引上有1个频域资源,因此增加时域资源索引进行映射,如图39所示。其中,图39虚线框内的4个RO为一个RO组,即时域资源索引为index 4~7,频域资源索引为index0的RO组。In addition, since the time-domain resource index is index 0-3, four SSB0s have been mapped to the RO group with the frequency-domain resource index of index 0, and high-level parameters (such as the parameter msg1-FDM=1) configure a RO time-domain resource index There is one frequency domain resource on , so the time domain resource index is added for mapping, as shown in Figure 39. Among them, the four ROs in the dotted line box in Figure 39 are an RO group, the resource index in the real-time domain is index 4-7, and the resource index in the frequency domain is the RO group index0.
2)映射SSB22) Map SSB2
按照映射顺序,在SSB0映射完成之后,接下来映射SSB2。其中,SSB2对应的Msg1的重复次数(K2)为2。According to the mapping sequence, after the SSB0 mapping is completed, SSB2 is mapped next. Wherein, the repetition number (K 2 ) of Msg1 corresponding to SSB2 is 2.
SSB2在时域上以2个RO打包整体映射,如图40所示。其中,图40中虚线框内的4个RO为增加时域资源索引后的一个RO组,即时域资源索引为index 8~11,频域资源索引为index 0的RO组。SSB2 packs the overall mapping with 2 ROs in the time domain, as shown in Figure 40. Among them, the four ROs in the dashed box in Figure 40 are an RO group after adding time domain resource index, the time domain resource index is index 8-11, and the frequency domain resource index is the RO group index 0.
由于N=1/2,因此SSB2需要映射到2个RO上。此时,将SSB2再次进行打包整体映射,如图41所示。Since N=1/2, SSB2 needs to be mapped to 2 ROs. At this point, SSB2 is packaged and mapped again, as shown in Figure 41.
3)映射SSB13) Map SSB1
按照映射顺序,在SSB2映射完成之后,接下来映射SSB1。其中,SSB1对应的Msg1的重复次数(K1)为1。由于N=1/2,因此SSB1需要重复映射到2个RO上。According to the mapping sequence, after the SSB2 mapping is completed, SSB1 is mapped next. Wherein, the repetition number (K 1 ) of Msg1 corresponding to SSB1 is 1. Since N=1/2, SSB1 needs to be repeatedly mapped to two ROs.
与上述类似,如图42所示。其中,图42虚线框内的4个RO为一个RO组,即时域资源索引为index 12~15,频域资源索引为index 0的RO组。Similar to above, as shown in Figure 42. Among them, the four ROs in the dotted line box in Figure 42 are an RO group, the resource index in the real-time domain is index 12-15, and the resource index in the frequency domain is an RO group with index 0.
与上述类似,如图43所示。Similar to above, as shown in Figure 43.
至此,该3个SSB索引映射完成。So far, the three SSB index mappings are completed.
情形2:N=1Case 2: N=1
若N=1,则表示该3个SSB中的每个SSB映射到1个RO上。If N=1, it means that each of the three SSBs is mapped to one RO.
具体映射细节如下:The specific mapping details are as follows:
1)映射SSB01) Map SSB0
按照映射顺序,先对SSB0进行映射。其中,SSB0对应的Msg1的重复次数(K0)为4。According to the mapping order, SSB0 is mapped first. Wherein, the repetition number (K 0 ) of Msg1 corresponding to SSB0 is 4.
在时域资源索引为index 0~3,频域资源索引为index 0的RO组上,按照时域资源索引从小到大的顺序,依次映射SSB0对应的RO。On the RO group whose time-domain resource index is index 0-3 and frequency-domain resource index is index 0, the ROs corresponding to SSB0 are mapped in sequence according to the order of time-domain resource index from small to large.
由于N=1,因此SSB0需要映射到1个RO上。Since N=1, SSB0 needs to be mapped to one RO.
SSB0在时域上以4个RO打包整体映射,如图38所示。SSB0 is mapped in four RO packages in the time domain, as shown in Figure 38.
2)映射SSB22) Map SSB2
按照映射顺序,在SSB0映射完成之后,接下来映射SSB2。其中,SSB2对应的Msg1的重复次数(K2)为2。由于N=1,因此SSB2需要映射到1个RO上。According to the mapping sequence, after the SSB0 mapping is completed, SSB2 is mapped next. Wherein, the repetition number (K 2 ) of Msg1 corresponding to SSB2 is 2. Since N=1, SSB2 needs to be mapped to one RO.
SSB2在时域上以2个RO打包整体映射,如图44所示。其中,图44中的虚线框内的4个RO为增加时域资源索引后的一个RO组,即时域资源索引为index 4~7,频域资源索引为index 0的RO组。SSB2 packs the overall mapping with 2 ROs in the time domain, as shown in Figure 44. Among them, the four ROs in the dashed box in Figure 44 are an RO group after adding time domain resource index, the time domain resource index is index 4 to 7, and the frequency domain resource index is the RO group index 0.
3)映射SSB13) Map SSB1
按照映射顺序,在SSB2映射完成之后,接下来映射SSB1。其中,SSB1对应的Msg1的重复次数(K1)为1。由于N=1,因此SSB1需要映射到1个RO上。According to the mapping sequence, after the SSB2 mapping is completed, SSB1 is mapped next. Wherein, the repetition number (K 1 ) of Msg1 corresponding to SSB1 is 1. Since N=1, SSB1 needs to be mapped to one RO.
在映射SSB1时,与上述类似,如图45所示。
When mapping SSB1, it is similar to the above, as shown in Figure 45.
至此,该3个SSB索引映射完成。So far, the three SSB index mappings are completed.
情形3:N>1Case 3: N>1
若N=2,则表示该3个SSB中的每2个SSB映射到1个RO上。If N=2, it means that every 2 SSBs in the 3 SSBs are mapped to 1 RO.
结合上述“当N>1时,SSB索引的映射规则”中的内容,除了需要实现上述之外,还需要实现如下:Combined with the content in the above "When N>1, SSB index mapping rules", in addition to the above, it is also necessary to implement the following:
◆每2个SSB索引各自所映射的RO存在相同和/或不相同。◆The ROs mapped to each of the two SSB indexes are the same or different.
◆若有2个SSB索引各自所映射的RO存在相同,则该2个SSB索引以相同RO中的RA preamble index进行区分。◆If there are two SSB indexes that map to the same RO, then the two SSB indexes are distinguished by the RA preamble index in the same RO.
具体映射细节如下:The specific mapping details are as follows:
1)映射SSB0和SSB21) Map SSB0 and SSB2
按照映射顺序,先对SSB0和SSB2进行映射。其中,SSB0对应的Msg1的重复次数(K0)为4,SSB2对应的Msg1的重复次数(K2)为2。According to the mapping sequence, SSB0 and SSB2 are mapped first. Wherein, the repetition number (K 0 ) of Msg1 corresponding to SSB0 is 4, and the repetition number (K 2 ) of Msg1 corresponding to SSB2 is 2.
在时域资源索引为0~3,频域资源索引为index0的RO组上,按照时域资源索引从小到大的顺序,依次映射SSB0和SSB4对应的RO。On the RO group whose time-domain resource index is 0-3 and whose frequency-domain resource index is index0, the ROs corresponding to SSB0 and SSB4 are mapped sequentially according to the sequence of time-domain resource indexes from small to large.
如图46所示,在时域资源索引为0~3,频域资源索引为index 0的RO组中,时域资源索引为index 0~1的RO上均映射SSB0和SSB2,并以RA preamble index进行区分。其中,SSB0所关联的RA preamble index从0~31,而SSB2所关联的RA preamble index从32~63。As shown in Figure 46, in the RO group whose time-domain resource index is 0-3 and frequency-domain resource index is index 0, SSB0 and SSB2 are mapped to the ROs whose time-domain resource index is index 0-1, and RA preamble index to distinguish. Among them, the RA preamble index associated with SSB0 is from 0 to 31, and the RA preamble index associated with SSB2 is from 32 to 63.
在时域资源索引为index 2~3的RO上均只映射SSB0,并且该index 2~3的RO所映射的SSB0关联的RA preamble index从0~31,而剩下的RA preamble index不进行映射。Only SSB0 is mapped on the ROs whose time domain resource indexes are index 2~3, and the RA preamble index associated with SSB0 mapped by the index 2~3 ROs is from 0~31, and the remaining RA preamble indexes are not mapped. .
2)映射SSB12) Map SSB1
按照映射顺序,在SSB0和SSB2映射完成之后,接下来映射SSB1。其中,SSB1对应的Msg1的重复次数(K1)为1。According to the mapping order, after the mapping of SSB0 and SSB2 is completed, SSB1 is mapped next. Wherein, the repetition number (K 1 ) of Msg1 corresponding to SSB1 is 1.
由于时域资源索引为0~3,频域资源索引为index 0的RO组上的RO已经映射完,高层参数(如参数msg1-FDM=1)配置一个RO的时域资源索引上有1个频域资源,因此增加时域资源索引进行映射。选取时域资源索引为index 4~7,频域资源索引为index 0的RO组中的前1个RO,即时域资源索引为index 4的RO,将SSB1进行映射,并且该index 4所映射的SSB1关联的RA preamble index从0~31,而剩下的RA preamble index不进行映射,如图47所示。Since the time domain resource index is 0 to 3, the RO on the RO group with the frequency domain resource index index 0 has been mapped, and there is 1 on the time domain resource index of an RO configured with high-level parameters (such as the parameter msg1-FDM=1) Frequency domain resources, so increase the time domain resource index for mapping. Select the first RO in the RO group whose time-domain resource index is index 4-7, frequency-domain resource index is index 0, and the RO whose real-time domain resource index is index 4, and map SSB1, and the index 4 mapped The RA preamble index associated with SSB1 is from 0 to 31, and the remaining RA preamble indexes are not mapped, as shown in Figure 47.
至此,该3个SSB索引映射完成。So far, the three SSB index mappings are completed.
5、一种通信方法的示例性说明5. An exemplary description of a communication method
综上所述,下面以网络设备与终端设备之间的交互为例,对本申请实施例的一种通信方法进行示例介绍。其中,网络设备也可以为芯片/芯片模组/装置等,终端设备也可以为芯片/芯片模组/装置等,对此不作具体限制。To sum up, the following uses the interaction between a network device and a terminal device as an example to introduce a communication method according to an embodiment of the present application. Wherein, the network device may also be a chip/chip module/device, etc., and the terminal device may also be a chip/chip module/device, etc., which are not specifically limited.
如图48所示,为本申请实施例的一种通信方法的流程示意图,具体包括如下步骤:As shown in FIG. 48, it is a schematic flowchart of a communication method in the embodiment of the present application, which specifically includes the following steps:
S4810、网络设备发送指示信息,该指示信息用于指示Ki。S4810. The network device sends indication information, where the indication information is used to indicate K i .
其中,Ki为第一小区中的SSB索引i对应的随机接入请求消息的重复次数,1≤i≤M,M为第一小区中SSB的总个数,Ki为大于或等于1的正整数。Among them, K i is the number of repetitions of the random access request message corresponding to the SSB index i in the first cell, 1≤i≤M, M is the total number of SSBs in the first cell, and K i is greater than or equal to 1 positive integer.
其中,SSB索引i指示的SSB为终端设备从监听到的SSB中选择的SSB。Wherein, the SSB indicated by the SSB index i is the SSB selected by the terminal device from the monitored SSBs.
对应的,终端设备接收该指示信息。Correspondingly, the terminal device receives the indication information.
需要说明的是,对于“指示信息”、“第一小区”、“Ki”等,具体详见上述内容,对此不再赘述。It should be noted that, for the "indication information", "first cell", "K i ", etc., refer to the above content for details, and details will not be repeated here.
S4820、终端设备根据Ki,发送随机接入请求消息。S4820. The terminal device sends a random access request message according to K i .
对应的,网络设备接收该随机接入请求消息。Correspondingly, the network device receives the random access request message.
可见,本申请实施例中,由于网络设备可以通过指示信息向终端设备指示为SSB索引对应的随机接入请求消息的重复次数,使得终端设备可以在选择某一SSB后,根据用于标识该SSB的SSB索引对应的随机接入请求消息的重复次数,发送随机接入请求消息以实现覆盖增强,从而有利于提高随机接入请求消息的传输可靠性,以及提升终端设备随机接入成功的可能性。It can be seen that in the embodiment of the present application, since the network device can indicate to the terminal device the number of repetitions of the random access request message corresponding to the SSB index through the indication information, the terminal device can select a certain SSB according to the number of times used to identify the SSB The number of repetitions of the random access request message corresponding to the SSB index, and the random access request message is sent to achieve coverage enhancement, which is conducive to improving the transmission reliability of the random access request message and improving the possibility of successful random access of the terminal device .
在本申请实施例中,在终端设备根据Ki,发送随机接入请求消息的情况下,终端设备发送随机接入请求消息的重复次数不大于Ki。示例的,终端设备在第k次发送随机接入请求消息的情况下,随机接入成功。若k小于Ki,则终端设备可以无需再重复发送随机接入请求消息。In the embodiment of the present application, in the case that the terminal device sends the random access request message according to K i , the number of repetitions for the terminal device to send the random access request message is not greater than K i . For example, when the terminal device sends the random access request message for the kth time, the random access is successful. If k is less than K i , the terminal device does not need to send the random access request message repeatedly.
需要说明的是,本申请实施例上述是以指示信息用于Ki为例进行介绍的,在本申请实施例中,指示信息还可以指示两个或更多个的随机接入请求消息的重复次数,具体的终端设备根据哪个随机接入请求消息的重复次数发送随机接入请求消息,与终端设备选择哪个SSB相关。以终端设备选择SSB1为例,则终端设备根据SSB1对应的随机接入请求消息的重复次数,发送随机接入请求消息。
It should be noted that, the above embodiments of the present application are described above using the indication information for K i as an example. In the embodiment of the present application, the indication information may also indicate the repetition of two or more random access request messages The number of times, the specific number of times the terminal device sends the random access request message according to which random access request message is repeated, is related to which SSB the terminal device selects. Taking the terminal device selecting SSB1 as an example, the terminal device sends the random access request message according to the number of repetitions of the random access request message corresponding to SSB1.
网络设备可以通过***信息向终端设备指示与SSB对应的随机接入请求消息的重复次数。终端设备监听到至少一个SSB后,从至少一个SSB中选择一个SSB进行小区驻留,根据该选择的SSB对应的随机接入请求消息的重复次数,多次发送随机接入请求消息。示例的,对于同一小区的不同SSB指示的随机接入请求消息的重复次数可以是相同的,也可以是不同的。例如,与SSB1对应的随机接入请求消息的重复次数,和与SSB2对应的随机接入请求消息的重复次数可以是相同的,也可以是不同的。在一些可能的实现中,指示信息可以是在小区搜索、小区重选、上下行同步、小区接入、小区驻留、初始接入或上下行资源调度等过程中发送或接收的,对此不做限定。The network device may indicate to the terminal device the number of repetitions of the random access request message corresponding to the SSB through the system information. After listening to at least one SSB, the terminal device selects one SSB from the at least one SSB to camp on the cell, and sends the random access request message multiple times according to the number of repetitions of the random access request message corresponding to the selected SSB. For example, the repetition times of random access request messages indicated by different SSBs of the same cell may be the same or different. For example, the repetition times of the random access request message corresponding to SSB1 and the repetition times of the random access request message corresponding to SSB2 may be the same or different. In some possible implementations, the indication information may be sent or received during cell search, cell reselection, uplink and downlink synchronization, cell access, cell camping, initial access, or uplink and downlink resource scheduling. Do limited.
此外,网络设备还可以通过高层信令(如RRC信令)向终端设备指示与SSB对应的随机接入请求消息。在这种情况下,高层信令包括指示信息。当然,本申请实施例中不限定携带指示信息的消息或信令。In addition, the network device may also indicate to the terminal device the random access request message corresponding to the SSB through high-layer signaling (such as RRC signaling). In this case, high layer signaling includes indication information. Certainly, the message or signaling carrying indication information is not limited in this embodiment of the present application.
在一些可能的实现中,指示信息用于指示Ki,Ki为与SSB索引i对应的Msg1的重复次数,其中,SSB索引i所标识的SSB为第一小区中的SSB,1≤i≤M,i为正整数,M为第一小区中SSB的总个数。In some possible implementations, the indication information is used to indicate K i , where K i is the number of repetitions of Msg1 corresponding to SSB index i, where the SSB identified by SSB index i is the SSB in the first cell, and 1≤i≤ M, i is a positive integer, and M is the total number of SSBs in the first cell.
在一些可能的实现中,指示信息还用于指示Kj,Kj为SSB索引j对应的Msg1的重复次数,其中,SSB索引j所标识的SSB为第一小区中的SSB,且SSB索引j所标识的SSB与SSS索引i所标识的SSB不同,即j与i是不同的取值。1≤j≤M,j为正整数,M为第一小区中SSB的总个数。In some possible implementations, the indication information is also used to indicate K j , where K j is the number of repetitions of Msg1 corresponding to the SSB index j, where the SSB identified by the SSB index j is the SSB in the first cell, and the SSB index j The identified SSB is different from the SSB identified by the SSS index i, that is, j and i are different values. 1≤j≤M, j is a positive integer, and M is the total number of SSBs in the first cell.
在一些可能的实现中,不同SSB索引对应的Msg1的重复次数不同。以SSB索引i和SSB索引j为例。SSB索引i对应Ki,SSB索引j对应Kj,在不同SSB索引对应的Msg1的重复次数不同的情况下,Ki与Kj不同。In some possible implementations, the repetition times of Msg1 corresponding to different SSB indexes are different. Take SSB index i and SSB index j as an example. SSB index i corresponds to K i , SSB index j corresponds to K j , and when the repetition times of Msg1 corresponding to different SSB indexes are different, K i and K j are different.
需要说明的是,由于SSB索引i与SSB索引j是不同的两个SSB索引,因此本申请实施例可以向不同的SSB索引配置不同的Msg1的重复次数,即Ki与Kj不同,以便提高配置的灵活性。It should be noted that since SSB index i and SSB index j are two different SSB indexes, the embodiment of the present application can configure different repetition times of Msg1 to different SSB indexes, that is, K i and K j are different, so as to improve Configuration flexibility.
在一些可能的实现中,与不同波束对应的SSB对应的Msg1的重复次数不同。以SSB索引i和SSB索引j为例。SSB索引i对应Ki,SSB索引j对应Kj。若与SSB索引i所标识的SSB对应的波束、和与SSB索引j所标识的SSB对应的波束不同,则Ki与Kj不同。在一些实施例中,若与SSB索引i所标识的SSB对应的波束、和与SSB索引j所标识的SSB对应的波束相同,则Ki与Kj可以不同,也可以相同。In some possible implementations, the repetition times of Msg1 corresponding to SSBs corresponding to different beams are different. Take SSB index i and SSB index j as an example. SSB index i corresponds to K i , and SSB index j corresponds to K j . If the beam corresponding to the SSB identified by the SSB index i is different from the beam corresponding to the SSB identified by the SSB index j, K i and K j are different. In some embodiments, if the beam corresponding to the SSB identified by the SSB index i is the same as the beam corresponding to the SSB identified by the SSB index j, then K i and K j may be different or the same.
需要说明的是,由于波束对应SSB,且不同波束对应不同的SSB,因此本申请实施例可以向不同波束对应的SSB配置不同的Msg1的重复次数。It should be noted that, since beams correspond to SSBs, and different beams correspond to different SSBs, in this embodiment of the present application, different repetition times of Msg1 may be configured for SSBs corresponding to different beams.
在本申请的另一些实施例中,网络设备可以从Msg1的重复次数候选值集合选择为终端设备指示与SSB索引对应的Msg1的重复次数。Msg1的重复次数候选值集合可以是通过协议预定义的,也可以是网络设备基于某一算法或策略确定的,还可以是其它设备或服务器指示的,对此不做限定。示例的,Msg1的重复次数候选值集合可以包括至少一个候选值。例如,每个候选值为2的幂数。在这种情况下,Msg1的重复次数候选值集合为集合{1,2,4,8,16,…,2n}。例如,以SSB索引i为例。SSB索引i对应Ki,Ki=2a,a为大于或等于0的正整数。In some other embodiments of the present application, the network device may select from the set of candidate values of the repetition number of Msg1 to indicate the repetition number of Msg1 corresponding to the SSB index for the terminal device. The set of candidate values for the number of repetitions of Msg1 may be predefined by a protocol, determined by a network device based on a certain algorithm or policy, or instructed by other devices or servers, which is not limited. Exemplarily, the repetition count candidate value set of Msg1 may include at least one candidate value. For example, each candidate value is a power of 2. In this case, the set of candidate values for the number of repetitions of Msg1 is set {1, 2, 4, 8, 16, . . . , 2 n }. For example, take SSB index i as an example. The SSB index i corresponds to K i , where K i =2 a , and a is a positive integer greater than or equal to 0.
或者,在本申请的又一些实施例中,与SSB索引对应的Msg1的重复次数为2的幂数。例如,以SSB索引i为例。SSB索引i对应Ki,Ki=2a,a为大于或等于0的正整数。再例如,以SSB索引j为例。SSB索引j对应Kj,Kj=2b,b为大于或等于0的正整数。Or, in still some embodiments of the present application, the repetition times of Msg1 corresponding to the SSB index is a power of 2. For example, take SSB index i as an example. The SSB index i corresponds to K i , where K i =2 a , and a is a positive integer greater than or equal to 0. For another example, take the SSB index j as an example. The SSB index j corresponds to K j , K j =2 b , and b is a positive integer greater than or equal to 0.
在一些可能的实现中,S4820中的根据Ki,发送随机接入请求消息,可以包括如下步骤:In some possible implementations, the sending of the random access request message according to K i in S4820 may include the following steps:
终端设备根据Ki,确定Mi个RO,Ki≤Mi≤Ki*L;其中,L=N,N>1;或者,L=1/N,N≤1;N用于指示SSB索引i指示的SSB与RO的映射关系;The terminal device determines M i ROs according to K i , K i ≤ M i ≤ K i *L; where, L=N, N>1; or, L=1/N, N≤1; N is used to indicate SSB The mapping relationship between the SSB indicated by the index i and the RO;
终端设备选择Mi个RO中的Ki个RO,发送随机接入请求消息。The terminal device selects K i ROs from the M i ROs, and sends a random access request message.
需要说明的是,由于Msg1需要由RO承载(或传输),因此为了实现发送Msg1,本申请实施例需要根据Ki确定Mi个RO,并通过Mi个RO中的Ki个RO来发送Msg1以实现Msg1的多次(或重复)传输。It should be noted that since Msg1 needs to be carried (or transmitted) by ROs, in order to send Msg1, this embodiment of the present application needs to determine M i ROs according to K i , and send them through K i ROs in M i ROs Msg1 to realize multiple (or repeated) transmission of Msg1.
在一些可能的实现中,N的取值为1/8、1/4、1/2、1、2、4、8、16中的一个。In some possible implementations, the value of N is one of 1/8, 1/4, 1/2, 1, 2, 4, 8, and 16.
在一些可能的实现中,若Ki=K,且N≤1,则In some possible implementations, if K i =K, and N≤1, then
Mi个RO分为1/N个RO组,RO组在时域上包括K个RO,K为指示信息指示的随机接入请求消息的重复次数中的最大值。The M i ROs are divided into 1/N RO groups, and the RO group includes K ROs in the time domain, where K is the maximum value among the repetition times of the random access request message indicated by the indication information.
需要说明的是,RO组包括K个RO的时域资源索引所标识的时域资源所在的RO。也就是说,RO组包括时域上的K个RO。It should be noted that the RO group includes the ROs where the time domain resources identified by the time domain resource indexes of the K ROs are located. That is, the RO group includes K ROs in the time domain.
另外,Ki=K,说明SSB索引i对应的Msg1的重复次数(即Ki)为最大值。另外,N≤1,表示一个SSB可以映射N个RO。由于本申请实施例需要以第一小区中的SSB索引各自对应的Msg1的重复
次数中的最大值为粒度对RO的时域资源索引进行划分,因此本申请实施例可以根据Ki确定出1/N个RO组,而每个RO组在时域上包括K个RO,从而从该1/N个RO组中选择一个RO组以得到K个RO,以便多次(或重复)传输Msg1。In addition, K i =K, which means that the number of repetitions of Msg1 corresponding to the SSB index i (that is, K i ) is the maximum value. In addition, N≤1 means that one SSB can map N ROs. Since the embodiment of the present application needs to repeat the Msg1 corresponding to the SSB indexes in the first cell The maximum number of times is the granularity to divide the time-domain resource index of the RO, so the embodiment of the present application can determine 1/N RO groups according to K i , and each RO group includes K ROs in the time domain, so that Select one RO group from the 1/N RO groups to obtain K ROs, so as to transmit Msg1 multiple times (or repeatedly).
在一些可能的实现中,若N>1,或者若N≤1且Ki/N≤K,则In some possible implementations, if N>1, or if N≤1 and K i /N≤K, then
Mi个RO位于同一RO组,RO组在时域上包括K个RO,K为指示信息指示的随机接入请求消息的重复次数中的最大值。The M i ROs are located in the same RO group, and the RO group includes K ROs in the time domain, where K is the maximum value among the repetition times of the random access request message indicated by the indication information.
需要说明的是,RO组可以包括K个RO的时域资源索引。也就是说,RO包括时域上的K个RO。It should be noted that the RO group may include time-domain resource indexes of K ROs. That is, the RO includes K ROs in the time domain.
另外,N>1,表示一个RO可以映射N个SSB。此时,本申请实施例可以根据Ki确定出的Mi个RO位于同一RO组,从而从同一RO组中选择Ki个RO,以便多次(或重复)传输Msg1。其中,该RO组是按照Msg1的重复次数中的最大值为粒度对RO的时域资源索引进行划分的。In addition, N>1 means that one RO can map N SSBs. At this time, in the embodiment of the present application, the M i ROs determined according to K i are located in the same RO group, so that K i ROs are selected from the same RO group, so as to transmit Msg1 multiple times (or repeatedly). Wherein, the RO group divides the time-domain resource indexes of the ROs according to the maximum value of the repetition times of Msg1 as the granularity.
同理,N≤1,表示一个SSB可以映射N个RO。另外,Ki/N≤K,说明SSB索引i对应的Msg1的重复次数(即Ki)不为最大值。此时,本申请实施例可以根据Ki确定出的Mi个RO位于同一RO组,从而从同一RO组中选择Ki个RO,以便多次(或重复)传输Msg1。其中,该RO组是按照Msg1的重复次数中的最大值为粒度对RO的时域资源索引进行划分的。Similarly, N≤1 means that one SSB can map N ROs. In addition, K i /N≤K indicates that the number of repetitions of Msg1 corresponding to the SSB index i (that is, K i ) is not the maximum value. At this time, in the embodiment of the present application, the M i ROs determined according to K i are located in the same RO group, so that K i ROs are selected from the same RO group, so as to transmit Msg1 multiple times (or repeatedly). Wherein, the RO group divides the time-domain resource indexes of the ROs according to the maximum value of the repetition times of Msg1 as the granularity.
在一些可能的实现中,若N>1,则同一RO对应N个SSB。In some possible implementations, if N>1, the same RO corresponds to N SSBs.
需要说明的是,N>1,表示一个RO可以映射N个SSB。It should be noted that N>1 means that one RO can map N SSBs.
在一些可能的实现中,同一RO对应的N个SSB所对应的随机接入请求消息的重复次数是相同的或不相同的。In some possible implementations, the repetition times of the random access request messages corresponding to the N SSBs corresponding to the same RO are the same or different.
需要说明的是,一个RO可以映射N个SSB,而N个SSB中的各个SSB对应的Msg1的重复次数可以是相同的,也可以是不同的。It should be noted that one RO may be mapped to N SSBs, and the number of repetitions of Msg1 corresponding to each of the N SSBs may be the same or different.
在一些可能的实现中,终端设备是按照与SSB索引对应的随机接入请求消息的重复次数从大到小的顺序依次确定RO的。In some possible implementations, the terminal device sequentially determines the ROs in descending order of the number of repetitions of the random access request message corresponding to the SSB index.
在一些可能的实现中,终端设备针对具有同一随机接入请求消息的重复次数的SSB索引,是按照从小到大的顺序确定RO的。In some possible implementations, the terminal device determines the ROs in ascending order for the SSB indexes with the repetition times of the same random access request message.
需要说明的是,结合上述“(7)SSB索引与RO之间的映射关系”中的内容可知,映射顺序可以为按照SSB索引各自对应的Msg1的重复次数进行降序排序,其中,具有相同重复次数的SSB索引进行升序排序。It should be noted that, in combination with the content in the above "(7) Mapping relationship between SSB index and RO", it can be seen that the mapping order can be sorted in descending order according to the number of repetitions of Msg1 corresponding to each SSB index, wherein The SSB index is sorted in ascending order.
在一些可能的实现中,终端设备是按照与SSB索引对应的Msg1的重复次数从小到大的顺序(升序)依次确定RO的。终端设备针对具有同一Msg1的重复次数的SSB索引,按照从小到大的顺序(升序)确定RO的。In some possible implementations, the terminal device determines the ROs sequentially in ascending order (in ascending order) of the repetition times of Msg1 corresponding to the SSB index. The terminal device determines the ROs in ascending order (ascending order) for the SSB indexes with the repetition times of the same Msg1.
在一些可能的实现中,终端设备是按照与SSB索引对应的Msg1的重复次数从大到小的顺序(降序)依次确定RO的。终端设备针对具有同一Msg1的重复次数的SSB索引,按照从大到小的顺序(降序)确定RO的。In some possible implementations, the terminal device sequentially determines the ROs in descending order (descending order) of the repetition times of Msg1 corresponding to the SSB index. The terminal device determines the ROs in descending order (descending order) for the SSB indexes with the repetition times of the same Msg1.
在一些可能的实现中,终端设备是按照与SSB索引对应的Msg1的重复次数从小到大的顺序(升序)依次确定RO的。终端设备针对具有同一Msg1的重复次数的SSB索引,是按照从大到小的顺序(降序)确定RO的。In some possible implementations, the terminal device determines the ROs sequentially in ascending order (in ascending order) of the repetition times of Msg1 corresponding to the SSB index. For the SSB indexes with the repetition times of the same Msg1, the terminal device determines ROs in descending order (descending order).
本申请中各实施例可以单独使用,也可以相互结合使用,以实现不同的技术效果。The various embodiments in this application can be used alone or in combination with each other to achieve different technical effects.
6、一种通信装置的示例性说明6. An exemplary description of a communication device
上述主要从方法侧的角度对本申请实施例的方案进行了介绍。可以理解的是,终端设备或网络设备为了实现上述功能,其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,本申请能够以硬件或硬件与计算机软件的结合形式来实现。某个功能究竟以硬件或计算机软件驱动硬件的方式来执行,取决于技术方案的特定应用和设计约束条件。本领域技术人员可以对每个特定的应用使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。The foregoing mainly introduces the solutions of the embodiments of the present application from the perspective of the method side. It can be understood that, in order to realize the above-mentioned functions, the terminal device or network device includes corresponding hardware structures and/or software modules for performing various functions. Those skilled in the art should easily realize that the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may implement the described functionality using different methods for each particular application, but such implementation should not be considered as exceeding the scope of the present application.
本申请实施例可以根据上述方法示例对终端设备或网络设备进行功能单元的划分。例如,可以对应各个功能划分各个功能单元,也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件程序模块的形式实现。需要说明的是,本申请实施例中对单元的划分是示意性的,只是一种逻辑功能划分,而实际实现时可以有另外的划分方式。In this embodiment of the present application, the terminal device or the network device may be divided into functional units according to the foregoing method examples. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The above-mentioned integrated units can be implemented not only in the form of hardware, but also in the form of software program modules. It should be noted that the division of units in the embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation.
在采用集成的单元的情况下,图49是本申请实施例的一种通信装置的功能单元组成框图。通信装置4900包括:接收单元4901和发送单元4902。In the case of using integrated units, FIG. 49 is a block diagram of functional units of a communication device according to an embodiment of the present application. The communication device 4900 includes: a receiving unit 4901 and a sending unit 4902 .
需要说明的是,接收单元4901可以是一种用于收发信号、数据、信息等的模块单元。
It should be noted that the receiving unit 4901 may be a modular unit for sending and receiving signals, data, information, and the like.
发送单元4902可以是一种用于对信号、数据、信息等进行处理的模块单元,对此不作具体限制。The sending unit 4902 may be a modular unit for processing signals, data, information, etc., which is not specifically limited.
通信装置4900还可以包括存储单元,用于存储通信装置4900所执行的计算机程序代码或者指令。存储单元可以是存储器。The communication device 4900 may also include a storage unit for storing computer program codes or instructions executed by the communication device 4900 . The storage unit may be a memory.
另外,需要说明的是,通信装置4900可以是芯片或者芯片模组。In addition, it should be noted that the communication device 4900 may be a chip or a chip module.
在一些可能的实现中,接收单元4901和发送单元4902可以集成在一个单元中,或者分离的单元。In some possible implementations, the receiving unit 4901 and the sending unit 4902 may be integrated into one unit, or separate units.
例如,接收单元4901和发送单元4902可以集成在通信单元中。其中,通信单元可以是通信接口、收发器、收发电路等。For example, the receiving unit 4901 and the sending unit 4902 may be integrated in a communication unit. Wherein, the communication unit may be a communication interface, a transceiver, a transceiver circuit, and the like.
又例如,接收单元4901和发送单元4902可以集成在处理单元中。其中,处理单元可以是处理器或控制器,例如可以是中央处理器(central processing unit,CPU)、通用处理器、数字信号处理器(digital signal processor,DSP)、专用集成电路(application-specific integrated circuit,ASIC)、现场可编程门阵列(field programmable gate array,FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框、模块和电路。处理单元也可以是实现计算功能的组合,例如包含一个或多个微处理器组合、DSP和微处理器的组合等。For another example, the receiving unit 4901 and the sending unit 4902 may be integrated into a processing unit. Wherein, the processing unit may be a processor or a controller, such as a central processing unit (central processing unit, CPU), a general purpose processor, a digital signal processor (digital signal processor, DSP), an application-specific integrated circuit (application-specific integrated circuit) circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processing unit may also be a combination that realizes computing functions, for example, a combination of one or more microprocessors, a combination of DSP and a microprocessor, and the like.
具体实现时,接收单元4901和发送单元4902用于执行如上述方法实施例中由终端设备、芯片、芯片模组等执行的任一步骤,如发送或接收等数据传输。下面进行详细说明。During specific implementation, the receiving unit 4901 and the sending unit 4902 are used to perform any step performed by the terminal device, chip, chip module, etc. in the above method embodiments, such as data transmission such as sending or receiving. Detailed description will be given below.
接收单元4901,用于接收指示信息,指示信息用于指示Ki,Ki为第一小区中的同步信号块SSB索引i对应的随机接入请求消息的重复次数,1≤i≤M,M为第一小区中SSB的总个数,Ki为大于或等于1的正整数;The receiving unit 4901 is configured to receive indication information, the indication information is used to indicate K i , K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1≤i≤M, M is the total number of SSBs in the first cell, K i is a positive integer greater than or equal to 1;
发送单元4902,用于根据Ki,发送随机接入请求消息,SSB索引i指示的SSB为终端设备从监听到的SSB中选择的SSB。The sending unit 4902 is configured to send a random access request message according to K i , and the SSB indicated by the SSB index i is the SSB selected by the terminal device from the monitored SSBs.
可见,本申请实施例中通过引入指示信息,使得可以通过指示信息指示SSB索引或SSB配置的随机接入请求消息的重复次数,然后通信装置4900可以根据选择的SSB对应的随机接入请求消息的重复次数,向网络设备多次(或重复)发送随机接入请求消息,因而有助于实现覆盖增强,提高随机接入请求消息的传输可靠性,以及提升通信装置4900随机接入成功的可能性。It can be seen that, in the embodiment of the present application, by introducing the indication information, the indication information can indicate the SSB index or the number of repetitions of the random access request message configured by the SSB, and then the communication device 4900 can use the random access request message corresponding to the selected SSB The number of repetitions, sending the random access request message to the network device multiple times (or repeatedly), thus helping to achieve coverage enhancement, improve the transmission reliability of the random access request message, and improve the possibility of successful random access of the communication device 4900 .
需要说明的是,图49所述实施例中各个操作的具体实现可以详见上述所述的方法实施例中的描述,在此不再具体赘述。It should be noted that, for the specific implementation of each operation in the embodiment shown in FIG. 49 , refer to the description in the above-mentioned method embodiment for details, and details are not repeated here.
在一些可能的实现中,指示信息用于指示Ki,Ki为与SSB索引i对应的Msg1的重复次数,其中,SSB索引i所标识的SSB为第一小区中的SSB,1≤i≤M,i为正整数,M为第一小区中SSB的总个数。In some possible implementations, the indication information is used to indicate K i , where K i is the number of repetitions of Msg1 corresponding to SSB index i, where the SSB identified by SSB index i is the SSB in the first cell, and 1≤i≤ M, i is a positive integer, and M is the total number of SSBs in the first cell.
在一些可能的实现中,指示信息还用于指示Kj,Kj为SSB索引j对应的Msg1的重复次数,其中,SSB索引j所标识的SSB为第一小区中的SSB,且SSB索引j所标识的SSB与SSS索引i所标识的SSB不同,即j与i是不同的取值。1≤j≤M,j为正整数,M为第一小区中SSB的总个数。In some possible implementations, the indication information is also used to indicate K j , where K j is the number of repetitions of Msg1 corresponding to SSB index j, where the SSB identified by SSB index j is the SSB in the first cell, and SSB index j The identified SSB is different from the SSB identified by the SSS index i, that is, j and i are different values. 1≤j≤M, j is a positive integer, and M is the total number of SSBs in the first cell.
在一些可能的实现中,Ki与Kj不同。In some possible implementations, K i is different from K j .
在一些可能的实现中,SSB索引i指示的SSB对应的波束与SSB索引j指示的SSB对应的波束不同。In some possible implementations, the beam corresponding to the SSB indicated by the SSB index i is different from the beam corresponding to the SSB indicated by the SSB index j.
在一些可能的实现中,根据Ki,发送随机接入请求消息方面,发送单元3802用于:In some possible implementations, according to K i , in terms of sending a random access request message, the sending unit 3802 is configured to:
终端设备根据Ki,确定Mi个RO,Ki≤Mi≤Ki*L;其中,L=N,N>1;或者,L=1/N,N≤1;N用于指示SSB索引i指示的SSB与RO的映射关系;The terminal device determines M i ROs according to K i , K i ≤ M i ≤ K i *L; where, L=N, N>1; or, L=1/N, N≤1; N is used to indicate SSB The mapping relationship between the SSB indicated by the index i and the RO;
终端设备选择Mi个RO中的Ki个RO,发送随机接入请求消息。The terminal device selects K i ROs from the M i ROs, and sends a random access request message.
在一些可能的实现中,N的取值为1/8、1/4、1/2、1、2、4、8、16中的一个。In some possible implementations, the value of N is one of 1/8, 1/4, 1/2, 1, 2, 4, 8, and 16.
在一些可能的实现中,若Ki=K,且N≤1,则In some possible implementations, if K i =K, and N≤1, then
Mi个RO分为1/N个RO组,RO组在时域上包括K个RO,K为指示信息指示的随机接入请求消息的重复次数中的最大值。The M i ROs are divided into 1/N RO groups, and the RO group includes K ROs in the time domain, where K is the maximum value among the repetition times of the random access request message indicated by the indication information.
在一些可能的实现中,若N>1,或者若N≤1且Ki/N≤K,则In some possible implementations, if N>1, or if N≤1 and K i /N≤K, then
Mi个RO位于同一RO组,RO组在时域上包括K个RO,K为指示信息指示的随机接入请求消息的重复次数中的最大值。The M i ROs are located in the same RO group, and the RO group includes K ROs in the time domain, where K is the maximum value among the repetition times of the random access request message indicated by the indication information.
在一些可能的实现中,若N>1,则同一RO对应N个SSB。In some possible implementations, if N>1, the same RO corresponds to N SSBs.
在一些可能的实现中,同一RO对应的N个SSB所对应的随机接入请求消息的重复次数是相同的或不相同的。In some possible implementations, the repetition times of the random access request messages corresponding to the N SSBs corresponding to the same RO are the same or different.
在一些可能的实现中,通信装置4900是按照与SSB索引对应的随机接入请求消息的重复次数从大到小的顺序依次确定RO的。
In some possible implementations, the communications apparatus 4900 sequentially determines the ROs in descending order of the number of repetitions of the random access request message corresponding to the SSB index.
在一些可能的实现中,通信装置4900针对具有同一随机接入请求消息的重复次数的SSB索引,是按照从小到大的顺序确定RO的。In some possible implementations, the communications apparatus 4900 determines the ROs in ascending order for the SSB indexes with the repetition times of the same random access request message.
7、又一种通信装置的示例性说明7. An exemplary description of another communication device
在采用集成的单元的情况下,图50是本申请实施例的又一种通信装置的功能单元组成框图。通信装置5000包括:发送单元5001。In the case of using integrated units, FIG. 50 is a block diagram of functional units of another communication device according to an embodiment of the present application. The communication device 5000 includes: a sending unit 5001 .
需要说明的是,发送单元5001可以是一种用于收发信号、数据、信息等的模块单元,对此不作具体限制。It should be noted that the sending unit 5001 may be a modular unit for sending and receiving signals, data, information, etc., which is not specifically limited.
通信装置5000还可以包括存储单元,用于存储通信装置5000所执行的计算机程序代码或者指令。存储单元可以是存储器。The communication device 5000 may further include a storage unit for storing computer program codes or instructions executed by the communication device 5000 . The storage unit may be a memory.
另外,需要说明的是,通信装置5000可以是芯片或者芯片模组。In addition, it should be noted that the communication device 5000 may be a chip or a chip module.
在一些可能的实现中,发送单元5001集成在处理单元中。其中,处理单元可以是处理器或控制器,例如可以是中央处理器(central processing unit,CPU)、通用处理器、数字信号处理器(digital signal processor,DSP)、专用集成电路(application-specific integrated circuit,ASIC)、现场可编程门阵列(field programmable gate array,FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框、模块和电路。处理单元也可以是实现计算功能的组合,例如包含一个或多个微处理器组合、DSP和微处理器的组合等。In some possible implementations, the sending unit 5001 is integrated in the processing unit. Wherein, the processing unit may be a processor or a controller, such as a central processing unit (central processing unit, CPU), a general purpose processor, a digital signal processor (digital signal processor, DSP), an application-specific integrated circuit (application-specific integrated circuit) circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processing unit may also be a combination that realizes computing functions, for example, a combination of one or more microprocessors, a combination of DSP and a microprocessor, and the like.
在一些可能的实现中,发送单元5001集成在通信单元中。其中,通信单元可以是通信接口、收发器、收发电路等。In some possible implementations, the sending unit 5001 is integrated in the communication unit. Wherein, the communication unit may be a communication interface, a transceiver, a transceiver circuit, and the like.
具体实现时,发送单元5001用于执行如上述方法实施例中由网络设备、芯片、芯片模组等执行的任一步骤,如发送数据/信号/信息等。下面进行详细说明。During specific implementation, the sending unit 5001 is configured to perform any step performed by the network device, chip, chip module, etc. in the above method embodiments, such as sending data/signals/information. Detailed description will be given below.
发送单元5001,用于发送指示信息,指示信息用于指示Ki,Ki为与SSB索引i对应的Msg1的重复次数,其中,SSB索引i所标识的SSB为第一小区中的SSB,1≤i≤M,i为正整数,M为第一小区中SSB的总个数。The sending unit 5001 is configured to send indication information, where the indication information is used to indicate K i , where K i is the number of repetitions of Msg1 corresponding to the SSB index i, wherein the SSB identified by the SSB index i is the SSB in the first cell, 1 ≤i≤M, i is a positive integer, and M is the total number of SSBs in the first cell.
可见,本申请实施例中通过引入指示信息,使得通信装置5000可以通过指示信息向终端设备指示为SSB索引或SSB配置的随机接入请求消息的重复(repetition)次数,然后终端设备可以根据选择的SSB对应的随机接入请求消息的重复次数,向通信装置5000多次(或重复)发送随机接入请求消息,因而有助于实现覆盖增强,提高随机接入请求消息的传输可靠性,以及提升终端设备随机接入成功的可能性。It can be seen that by introducing the indication information in the embodiment of the present application, the communication device 5000 can indicate to the terminal device the number of repetitions (repetition) of the random access request message configured for the SSB index or SSB through the indication information, and then the terminal device can use the selected The number of repetitions of the random access request message corresponding to the SSB sends the random access request message to the communication device more than 5000 times (or repeats), thus helping to achieve coverage enhancement, improving the transmission reliability of the random access request message, and improving Probability of successful random access of the terminal device.
需要说明的是,图50所述实施例中各个操作的具体实现可以详见上述所述的方法实施例中的描述,在此不再具体赘述。It should be noted that, for the specific implementation of each operation in the embodiment shown in FIG. 50 , refer to the description in the above-mentioned method embodiment for details, and details are not repeated here.
8、一种终端设备的示例性说明8. An exemplary description of a terminal device
请参阅图51,图51是本申请实施例的一种终端设备的结构示意图。其中,终端设备5100包括处理器5110、存储器5120以及用于连接处理器5110、存储器5120的通信总线。Please refer to FIG. 51 , which is a schematic structural diagram of a terminal device according to an embodiment of the present application. Wherein, the terminal device 5100 includes a processor 5110 , a memory 5120 and a communication bus for connecting the processor 5110 and the memory 5120 .
存储器5120包括但不限于是随机存储记忆体(random access memory,RAM)、只读存储器(read-only memory,ROM)、可擦除可编程只读存储器(erasable programmable read-only memory,EPROM)或便携式只读存储器(compact disc read-only memory,CD-ROM),该存储器5120用于存储终端设备5100所执行的程序代码和所传输的数据。The memory 5120 includes but is not limited to random access memory (random access memory, RAM), read-only memory (read-only memory, ROM), erasable programmable read-only memory (erasable programmable read-only memory, EPROM) or Portable read-only memory (compact disc read-only memory, CD-ROM), the memory 5120 is used to store program codes executed by the terminal device 5100 and transmitted data.
终端设备5100还包括通信接口,其用于接收和发送数据。The terminal device 5100 also includes a communication interface for receiving and sending data.
处理器5110可以是一个或多个CPU,在处理器5110是一个CPU的情况下,该CPU可以是单核CPU,也可以是多核CPU。The processor 5110 may be one or more CPUs. When the processor 5110 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.
终端设备5100中的处理器5110用于执行存储器5120中存储的计算机程序或指令5121,执行以下操作:接收指示信息,指示信息用于指示Ki,Ki为与SSB索引i对应的Msg1的重复次数,其中,SSB索引i所标识的SSB为第一小区中的SSB,1≤i≤M,i为正整数,M为第一小区中SSB的总个数。根据Ki,发送随机接入请求消息。The processor 5110 in the terminal device 5100 is configured to execute the computer program or instruction 5121 stored in the memory 5120, and perform the following operations: receive indication information, the indication information is used to indicate K i , and K i is the repetition of Msg1 corresponding to the SSB index i The number of times, wherein, the SSB identified by the SSB index i is the SSB in the first cell, 1≤i≤M, i is a positive integer, and M is the total number of SSBs in the first cell. According to K i , send a random access request message.
可见,本申请实施例中,由于网络设备可以通过指示信息向终端设备指示为SSB索引对应的随机接入请求消息的重复次数,使得终端设备5100可以在选择某一SSB后,根据用于标识该SSB的SSB索引对应的随机接入请求消息的重复次数,多次发送随机接入请求消息,因而有助于实现覆盖增强,提高随机接入请求消息的传输可靠性,以及提升终端设备随机接入成功的可能性。It can be seen that in the embodiment of the present application, since the network device can indicate to the terminal device the number of repetitions of the random access request message corresponding to the SSB index through the indication information, the terminal device 5100 can select a certain SSB according to the The number of repetitions of the random access request message corresponding to the SSB index of the SSB, the random access request message is sent multiple times, which helps to achieve coverage enhancement, improve the transmission reliability of the random access request message, and improve the random access of terminal equipment probability of success.
需要说明的是,各个操作的具体实现可以采用上述所示的方法实施例的相应描述,终端设备5100可以用于执行本申请上述方法实施例的终端设备侧的方法,在此不再具体赘述。It should be noted that the specific implementation of each operation can use the corresponding description of the above-mentioned method embodiments, and the terminal device 5100 can be used to execute the method on the terminal device side of the above-mentioned method embodiments of the present application, which will not be described in detail here.
9、一种网络设备的示例性说明
9. An exemplary description of a network device
请参阅图52,图52是本申请实施例的一种网络设备的结构示意图。其中,网络设备5200包括处理器5210、存储器5220以及用于连接处理器5210、存储器5220的通信总线。Please refer to FIG. 52, which is a schematic structural diagram of a network device according to an embodiment of the present application. Wherein, the network device 5200 includes a processor 5210 , a memory 5220 and a communication bus for connecting the processor 5210 and the memory 5220 .
存储器5220包括但不限于是RAM、ROM、EPROM或CD-ROM,该存储器5220用于存储相关指令及数据。The memory 5220 includes but not limited to RAM, ROM, EPROM or CD-ROM, and the memory 5220 is used to store related instructions and data.
网络设备5200还包括通信接口,其用于接收和发送数据。Network device 5200 also includes a communication interface for receiving and sending data.
处理器5210可以是一个或多个CPU,在处理器5210是一个CPU的情况下,该CPU可以是单核CPU,也可以是多核CPU。The processor 5210 may be one or more CPUs. When the processor 5210 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.
网络设备5200中的处理器5210用于执行存储器5220中存储的计算机程序或指令5221执行以下操作:发送指示信息,指示信息用于指示Ki,Ki为第一小区中的同步信号块SSB索引i对应的随机接入请求消息的重复次数,1≤i≤M,M为第一小区中SSB的总个数,Ki为大于或等于1的正整数。The processor 5210 in the network device 5200 is configured to execute the computer program stored in the memory 5220 or the instruction 5221 to perform the following operations: send indication information, the indication information is used to indicate K i , and K i is the synchronization signal block SSB index in the first cell The number of repetitions of the random access request message corresponding to i, 1≤i≤M, M is the total number of SSBs in the first cell, and K i is a positive integer greater than or equal to 1.
可见,在本申请实施例中,为了对通信***下的覆盖性进行增强,本申请实施例引入随机接入请求消息的重复次数,并通过指示信息来实现配置SSB索引对应的随机接入请求消息的重复次数,从而根据随机接入请求消息的重复次数,发送随机接入请求消息以实现覆盖增强,进而有利于提高随机接入请求消息的传输可靠性,以及提升终端设备随机接入成功的可能性。It can be seen that in the embodiment of the present application, in order to enhance the coverage under the communication system, the embodiment of the present application introduces the number of repetitions of the random access request message, and configures the random access request message corresponding to the SSB index through the indication information The number of repetitions of the random access request message, so that according to the number of repetitions of the random access request message, the random access request message is sent to achieve coverage enhancement, which is conducive to improving the transmission reliability of the random access request message and improving the possibility of successful random access of the terminal device sex.
需要说明的是,各个操作的具体实现可以采用上述所示的方法实施例的相应描述,网络设备5200可以用于执行本申请上述方法实施例的网络设备侧的方法,在此不再具体赘述。It should be noted that the specific implementation of each operation can use the corresponding description of the above-mentioned method embodiments, and the network device 5200 can be used to execute the method on the network device side of the above-mentioned method embodiments of the present application, which will not be described in detail here.
10、其他示例性说明10. Other illustrative instructions
本申请实施例还提供了一种芯片,包括处理器、存储器及存储在该存储器上的计算机程序或指令,其中,该处理器执行该计算机程序或指令以实现上述方法实施例所描述的步骤。An embodiment of the present application also provides a chip, including a processor, a memory, and a computer program or instruction stored on the memory, wherein the processor executes the computer program or instruction to implement the steps described in the above method embodiments.
本申请实施例还提供了一种芯片模组,包括收发组件和芯片,该芯片包括处理器、存储器及存储在该存储器上的计算机程序或指令,其中,该处理器执行该计算机程序或指令以实现上述方法实施例所描述的步骤。The embodiment of the present application also provides a chip module, including a transceiver component and a chip. The chip includes a processor, a memory, and a computer program or instruction stored on the memory, wherein the processor executes the computer program or instruction to The steps described in the above method embodiments are implemented.
本申请实施例还提供了一种计算机可读存储介质,其存储有计算机程序或指令,该计算机程序或指令被执行时实现上述方法实施例所描述的步骤。The embodiment of the present application also provides a computer-readable storage medium, which stores a computer program or instruction, and when the computer program or instruction is executed, implements the steps described in the above method embodiments.
本申请实施例还提供了一种计算机程序产品,包括计算机程序或指令,该计算机程序或指令被执行时实现上述方法实施例所描述的步骤。The embodiment of the present application also provides a computer program product, including a computer program or an instruction. When the computer program or instruction is executed, the steps described in the above method embodiments are implemented.
在上述实施例中,本申请实施例对各个实施例的描述都各有侧重,某个实施例中没有详述的部分,可以参见其他实施例的相关描述。In the above-mentioned embodiments, the embodiments of the present application have different emphases in the description of each embodiment, and for the parts not described in detail in a certain embodiment, refer to the relevant descriptions of other embodiments.
本申请实施例所描述的方法或者算法的步骤可以以硬件的方式来实现,也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成,软件模块可以被存放于RAM、闪存、ROM、可擦除可编程只读存储器(erasable programmable ROM,EPROM)、电可擦可编程只读存储器(electrically EPROM,EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器,从而使处理器能够从该存储介质读取信息,且可向该存储介质写入信息。当然,存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外,该ASIC可以位于终端设备或管理设备中。当然,处理器和存储介质也可以作为分立组件存在于终端设备或管理设备中。The steps of the methods or algorithms described in the embodiments of the present application may be implemented in the form of hardware, or may be implemented in the form of a processor executing software instructions. Software instructions can be composed of corresponding software modules, and software modules can be stored in RAM, flash memory, ROM, erasable programmable read-only memory (erasable programmable ROM, EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), registers, hard disk, removable hard disk, compact disc read-only (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be a component of the processor. The processor and storage medium can be located in the ASIC. In addition, the ASIC can be located in the terminal device or the management device. Certainly, the processor and the storage medium may also exist in the terminal device or the management device as discrete components.
本领域技术人员应该可以意识到,在上述一个或多个示例中,本申请实施例所描述的功能可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行该计算机程序指令时,全部或部分地产生按照本申请实施例所述的流程或功能。该计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。该计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输。例如,该计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line,DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。该计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。该可用介质可以是磁性介质(例如,软盘、硬盘、磁带)、光介质(例如,数字视频光盘(digital video disc,DVD))、或者半导体介质(例如,固态硬盘(solid state disk,SSD))等。Those skilled in the art should be aware that, in the above one or more examples, the functions described in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions may be stored in, or transmitted from, one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be sent from a website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) Transmission to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disk, SSD)) wait.
上述实施例中描述的各个装置、产品包含的各个模块/单元,其可以是软件模块/单元,也可以是硬件模块/单元,或者也可以部分是软件模块/单元,部分是硬件模块/单元。例如,对于应用于或集成于芯片的各个装置、产品,其包含的各个模块/单元可以都采用电路等硬件的方式实现,或者,至少部分模
块/单元可以采用软件程序的方式实现,该软件程序运行于芯片内部集成的处理器,剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现;对于应用于或集成于芯片模组的各个装置、产品,其包含的各个模块/单元可以都采用电路等硬件的方式实现,不同的模块/单元可以位于芯片模组的同一组件(例如芯片、电路模块等)或者不同组件中,或者,至少部分模块/单元可以采用软件程序的方式实现,该软件程序运行于芯片模组内部集成的处理器,剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现;对于应用于或集成于终端设备的各个装置、产品,其包含的各个模块/单元可以都采用电路等硬件的方式实现,不同的模块/单元可以位于终端设备内同一组件(例如,芯片、电路模块等)或者不同组件中,或者,至少部分模块/单元可以采用软件程序的方式实现,该软件程序运行于终端设备内部集成的处理器,剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现。The modules/units included in the devices and products described in the above embodiments may be software modules/units, hardware modules/units, or partly software modules/units and partly hardware modules/units. For example, for each device or product applied to or integrated in a chip, each module/unit contained in it may be implemented by hardware such as a circuit, or at least part of the module The block/unit can be realized by means of a software program, the software program runs on the processor integrated in the chip, and the remaining (if any) part of the modules/units can be realized by hardware such as circuits; Each of the devices and products, each module/unit contained in it may be realized by hardware such as a circuit, and different modules/units may be located in the same component (such as a chip, a circuit module, etc.) or in different components of the chip module, or , at least part of the modules/units can be realized by means of a software program, the software program runs on the processor integrated in the chip module, and the remaining (if any) parts of the modules/units can be realized by means of hardware such as circuits; Each device or product integrated in the terminal equipment may contain various modules/units that may be realized by means of hardware such as circuits, and different modules/units may be located in the same component (such as a chip, circuit module, etc.) or in different components in the terminal equipment. In the components, or at least part of the modules/units can be implemented in the form of a software program, the software program runs on the processor integrated in the terminal device, and the remaining (if any) parts of the modules/units can be implemented in hardware such as circuits.
以上所述的具体实施方式,对本申请实施例的目的、技术方案和有益效果进行了进一步详细说明,所应理解的是,以上所述仅为本申请实施例的具体实施方式而已,并不用于限定本申请实施例的保护范围,凡在本申请实施例的技术方案的基础之上,所做的任何修改、等同替换、改进等,均应包括在本申请实施例的保护范围之内。
The specific implementation manners described above further describe the purpose, technical solutions and beneficial effects of the embodiments of the present application in detail. To limit the protection scope of the embodiments of the present application, any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.
Claims (40)
- 一种通信方法,其特征在于,应用于终端设备之中;所述方法包括:A communication method, characterized in that it is applied to a terminal device; the method includes:接收指示信息,所述指示信息用于指示Ki,所述Ki为第一小区中的同步信号块SSB索引i对应的随机接入请求消息的重复次数,1≤i≤M,所述M为所述第一小区中SSB的总个数,所述Ki为大于或等于1的正整数;receiving indication information, where the indication information is used to indicate K i , where K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1≤i≤M, and the M is the total number of SSBs in the first cell, and the K i is a positive integer greater than or equal to 1;根据所述Ki,发送随机接入请求消息,所述SSB索引i指示的SSB为所述终端设备从监听到的SSB中选择的SSB。According to the K i , a random access request message is sent, and the SSB indicated by the SSB index i is the SSB selected by the terminal device from the monitored SSBs.
- 根据权利要求1所述的方法,其特征在于,所述Ki为随机接入请求消息的重复次数候选值集合中的一个候选值;和/或,所述Ki=2a,a为大于或等于0的正整数。The method according to claim 1, wherein the Ki is a candidate value in a set of candidate values for the number of repetitions of the random access request message; and/or, the K i =2 a , where a is greater than or A positive integer equal to 0.
- 根据权利要求1或2所述的方法,其特征在于,所述指示信息还用于指示Kj,所述Kj为所述第一小区中的SSB索引j对应的随机接入请求消息的重复次数,1≤j≤M,j与i是不同的取值。The method according to claim 1 or 2, wherein the indication information is further used to indicate K j , and the K j is the repetition of the random access request message corresponding to the SSB index j in the first cell Times, 1≤j≤M, j and i are different values.
- 根据权利要求3所述的方法,其特征在于,所述Ki与所述Kj不同。The method of claim 3, wherein said Ki is different from said Kj .
- 根据权利要求4所述的方法,其特征在于,所述SSB索引i指示的SSB对应的波束与所述SSB索引j指示的SSB对应的波束不同。The method according to claim 4, wherein the beam corresponding to the SSB indicated by the SSB index i is different from the beam corresponding to the SSB indicated by the SSB index j.
- 根据权利要求1所述的方法,其特征在于,所述根据所述Ki,发送随机接入请求消息,包括:The method according to claim 1, wherein the sending a random access request message according to the K i includes:根据所述Ki,确定Mi个随机接入时机RO,Ki≤Mi≤Ki*L;其中,L=N,N>1;或者,L=1/N,N≤1;N用于指示所述SSB索引i指示的SSB与RO的映射关系;According to the K i , determine M i random access opportunities RO, K i ≤ M i ≤ K i *L; where, L=N, N>1; or, L=1/N, N≤1; N used to indicate the mapping relationship between the SSB indicated by the SSB index i and the RO;选择所述Mi个RO中的Ki个RO,发送所述随机接入请求消息。Select K i ROs from the M i ROs, and send the random access request message.
- 根据权利要求6所述的方法,其特征在于,N的取值为1/8、1/4、1/2、1、2、4、8、16中的一个。The method according to claim 6, wherein the value of N is one of 1/8, 1/4, 1/2, 1, 2, 4, 8, and 16.
- 根据权利要求6或7所述的方法,其特征在于,若Ki=K,且N≤1,则The method according to claim 6 or 7, wherein if K i =K, and N≤1, then所述Mi个RO分为1/N个RO组,所述RO组在时域上包括K个RO,K为所述指示信息指示的随机接入请求消息的重复次数中的最大值。The M i ROs are divided into 1/N RO groups, and the RO group includes K ROs in the time domain, where K is the maximum value among the repetition times of the random access request message indicated by the indication information.
- 根据权利要求6或7所述的方法,其特征在于,若N>1,或者若N≤1且Ki/N≤K,则The method according to claim 6 or 7, wherein if N>1, or if N≤1 and K i /N≤K, then所述Mi个RO位于同一RO组,所述RO组在时域上包括K个RO,K为所述指示信息指示的随机接入请求消息的重复次数中的最大值。The M i ROs are located in the same RO group, and the RO group includes K ROs in the time domain, where K is the maximum value among the repetition times of the random access request message indicated by the indication information.
- 根据权利要求9所述的方法,其特征在于,若N>1,则同一RO对应N个SSB。The method according to claim 9, wherein if N>1, the same RO corresponds to N SSBs.
- 根据权利要求10所述的方法,其特征在于,同一RO对应的N个SSB所对应的随机接入请求消息的重复次数是相同的或不相同的。The method according to claim 10, characterized in that the repetition times of the random access request messages corresponding to the N SSBs corresponding to the same RO are the same or different.
- 根据权利要求8-10任一项所述的方法,其特征在于,所述终端设备是按照与SSB索引对应的随机接入请求消息的重复次数从大到小的顺序依次确定RO的。The method according to any one of claims 8-10, wherein the terminal device determines the RO in descending order of the number of repetitions of the random access request message corresponding to the SSB index.
- 根据权利要求12所述的方法,其特征在于,所述终端设备针对具有同一随机接入请求消息的重复次数的SSB索引,是按照从小到大的顺序确定RO的。The method according to claim 12, wherein the terminal device determines the ROs in ascending order for the SSB index with the repetition times of the same random access request message.
- 一种通信方法,其特征在于,应用于网络设备之中;所述方法包括:A communication method, characterized in that it is applied to a network device; the method includes:发送指示信息,所述指示信息用于指示Ki,所述Ki为第一小区中的同步信号块SSB索引i对应的随机接入请求消息的重复次数,1≤i≤M,所述M为所述第一小区中SSB的总个数,所述Ki为大于或等于1的正整数。sending indication information, where the indication information is used to indicate K i , where K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1≤i≤M, and the M is the total number of SSBs in the first cell, and the K i is a positive integer greater than or equal to 1.
- 根据权利要求14所述的方法,其特征在于,所述Ki为随机接入请求消息的重复次数候选值集合中的一个候选值;和/或,所述Ki=2a,a为大于或等于0的正整数。The method according to claim 14, wherein the Ki is a candidate value in a set of candidate values for the number of repetitions of the random access request message; and/or, the K i =2 a , where a is greater than or A positive integer equal to 0.
- 根据权利要求14或15所述的方法,其特征在于,所述指示信息还用于指示Kj,所述Kj为所述第一小区中的SSB索引j对应的随机接入请求消息的重复次数,1≤j≤M,j与i是不同的取值。The method according to claim 14 or 15, wherein the indication information is further used to indicate K j , and the K j is the repetition of the random access request message corresponding to the SSB index j in the first cell Times, 1≤j≤M, j and i are different values.
- 根据权利要求16所述的方法,其特征在于,所述Ki与所述Kj不同。The method of claim 16, wherein said Ki is different from said Kj .
- 根据权利要求17所述的方法,其特征在于,所述SSB索引i指示的SSB对应的波束与所述SSB索引j指示的SSB对应的波束不同。The method according to claim 17, wherein the beam corresponding to the SSB indicated by the SSB index i is different from the beam corresponding to the SSB indicated by the SSB index j.
- 一种通信装置,其特征在于,所述装置包括:A communication device, characterized in that the device includes:接收单元,用于接收指示信息,所述指示信息用于指示Ki,所述Ki为第一小区中的同步信号块SSB索引i对应的随机接入请求消息的重复次数,1≤i≤M,所述M为所述第一小区中SSB的总个数,所述Ki为大于或等于1的正整数;A receiving unit, configured to receive indication information, where the indication information is used to indicate K i , where K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1≤i≤ M, where M is the total number of SSBs in the first cell, and K i is a positive integer greater than or equal to 1;发送单元,用于根据所述Ki,发送随机接入请求消息,所述SSB索引i指示的SSB为所述终端设备从监听到的SSB中选择的SSB。A sending unit, configured to send a random access request message according to the K i , where the SSB indicated by the SSB index i is the SSB selected by the terminal device from the monitored SSBs.
- 根据权利要求19所述的装置,其特征在于,所述Ki为随机接入请求消息的重复次数候选值集 合中的一个候选值;和/或,所述Ki=2a,a为大于或等于0的正整数。The device according to claim 19, wherein the Ki is a set of candidate value sets of repetition times of the random access request message A candidate value in the combination; and/or, the K i =2 a , a is a positive integer greater than or equal to 0.
- 根据权利要求19或20所述的装置,其特征在于,所述指示信息还用于指示Kj,所述Kj为所述第一小区中的SSB索引j对应的随机接入请求消息的重复次数,1≤j≤M,j与i是不同的取值。The device according to claim 19 or 20, wherein the indication information is further used to indicate K j , where K j is the repetition of the random access request message corresponding to the SSB index j in the first cell Times, 1≤j≤M, j and i are different values.
- 根据权利要求21所述的装置,其特征在于,所述Ki与所述Kj不同。The apparatus of claim 21, wherein said Ki is different from said Kj .
- 根据权利要求22所述的装置,其特征在于,所述SSB索引i指示的SSB对应的波束与所述SSB索引j指示的SSB对应的波束不同。The apparatus according to claim 22, wherein the beam corresponding to the SSB indicated by the SSB index i is different from the beam corresponding to the SSB indicated by the SSB index j.
- 根据权利要求19所述的装置,其特征在于,在所述根据所述Ki,发送随机接入请求消息方面,所述发送单元用于:The device according to claim 19, wherein, in terms of sending a random access request message according to the K i , the sending unit is configured to:根据所述Ki,确定Mi个随机接入时机RO,Ki≤Mi≤Ki*L;其中,L=N,N>1;或者,L=1/N,N≤1;N用于指示所述SSB索引i指示的SSB与RO的映射关系;According to the K i , determine M i random access opportunities RO, K i ≤ M i ≤ K i *L; where, L=N, N>1; or, L=1/N, N≤1; N used to indicate the mapping relationship between the SSB indicated by the SSB index i and the RO;选择所述Mi个RO中的Ki个RO,发送所述随机接入请求消息。Select K i ROs from the M i ROs, and send the random access request message.
- 根据权利要求24所述的装置,其特征在于,N的取值为1/8、1/4、1/2、1、2、4、8、16中的一个。The device according to claim 24, wherein the value of N is one of 1/8, 1/4, 1/2, 1, 2, 4, 8, and 16.
- 根据权利要求24或25所述的装置,其特征在于,若Ki=K,且N≤1,则The device according to claim 24 or 25, wherein if K i =K, and N≤1, then所述Mi个RO分为1/N个RO组,所述RO组在时域上包括K个RO,K为所述指示信息指示的随机接入请求消息的重复次数中的最大值。The M i ROs are divided into 1/N RO groups, and the RO group includes K ROs in the time domain, where K is the maximum value among the repetition times of the random access request message indicated by the indication information.
- 根据权利要求24或25所述的装置,其特征在于,若N>1,或者若N≤1且Ki/N≤K,则The device according to claim 24 or 25, wherein if N>1, or if N≤1 and K i /N≤K, then所述Mi个RO位于同一RO组,所述RO组在时域上包括K个RO,K为所述指示信息指示的随机接入请求消息的重复次数中的最大值。The M i ROs are located in the same RO group, and the RO group includes K ROs in the time domain, where K is the maximum value among the repetition times of the random access request message indicated by the indication information.
- 根据权利要求27所述的装置,其特征在于,若N>1,则同一RO对应N个SSB。The device according to claim 27, wherein if N>1, the same RO corresponds to N SSBs.
- 根据权利要求28所述的装置,其特征在于,同一RO对应的N个SSB所对应的随机接入请求消息的重复次数是相同的或不相同的。The device according to claim 28, characterized in that the repetition times of the random access request messages corresponding to the N SSBs corresponding to the same RO are the same or different.
- 根据权利要求26-28任一项所述的装置,其特征在于,所述装置是按照与SSB索引对应的随机接入请求消息的重复次数从大到小的顺序依次确定RO的。The device according to any one of claims 26-28, wherein the device determines the ROs in descending order of the number of repetitions of the random access request message corresponding to the SSB index.
- 根据权利要求30所述的装置,其特征在于,所述装置针对具有同一随机接入请求消息的重复次数的SSB索引,是按照从小到大的顺序确定RO的。The device according to claim 30, characterized in that, for the SSB index with the repetition times of the same random access request message, the device determines ROs in ascending order.
- 一种通信装置,其特征在于,所述装置包括:A communication device, characterized in that the device includes:发送单元,用于发送指示信息,所述指示信息用于指示Ki,所述Ki为第一小区中的同步信号块SSB索引i对应的随机接入请求消息的重复次数,1≤i≤M,所述M为所述第一小区中SSB的总个数,所述Ki为大于或等于1的正整数。A sending unit, configured to send indication information, where the indication information is used to indicate K i , where K i is the number of repetitions of the random access request message corresponding to the synchronization signal block SSB index i in the first cell, 1≤i≤ M, where M is the total number of SSBs in the first cell, and K i is a positive integer greater than or equal to 1.
- 根据权利要求32所述的方法,其特征在于,所述Ki为随机接入请求消息的重复次数候选值集合中的一个候选值;和/或,所述Ki=2a,a为大于或等于0的正整数。The method according to claim 32, wherein the Ki is a candidate value in a set of candidate values for the number of repetitions of the random access request message; and/or, the K i =2 a , where a is greater than or A positive integer equal to 0.
- 根据权利要求32或33所述的方法,其特征在于,所述指示信息还用于指示Kj,所述Kj为所述第一小区中的SSB索引j对应的随机接入请求消息的重复次数,1≤j≤M,j与i是不同的取值。The method according to claim 32 or 33, wherein the indication information is also used to indicate K j , where K j is the repetition of the random access request message corresponding to the SSB index j in the first cell Times, 1≤j≤M, j and i are different values.
- 根据权利要求34所述的方法,其特征在于,所述Ki与所述Kj不同。The method of claim 34, wherein said Ki is different from said Kj .
- 根据权利要求35所述的方法,其特征在于,所述SSB索引i指示的SSB对应的波束与所述SSB索引j指示的SSB对应的波束不同。The method according to claim 35, wherein the beam corresponding to the SSB indicated by the SSB index i is different from the beam corresponding to the SSB indicated by the SSB index j.
- 一种终端设备,包括处理器、存储器及存储在所述存储器上的计算机程序或指令,其特征在于,所述处理器执行所述计算机程序或指令以实现权利要求1-13中任一项所述方法的步骤。A terminal device, comprising a processor, a memory, and a computer program or instruction stored on the memory, wherein the processor executes the computer program or instruction to implement any one of claims 1-13 steps of the method described above.
- 一种网络设备,包括处理器、存储器及存储在所述存储器上的计算机程序或指令,其特征在于,所述处理器执行所述计算机程序或指令以实现权利要求14-18中任一项所述方法的步骤。A network device, comprising a processor, a memory, and a computer program or instruction stored on the memory, wherein the processor executes the computer program or instruction to implement any one of claims 14-18 steps of the method described above.
- 一种计算机可读存储介质,其特征在于,其存储有计算机程序或指令,所述计算机程序或指令被执行时实现权利要求1-13或14-18中任一项所述方法的步骤。A computer-readable storage medium, characterized in that it stores computer programs or instructions, and when the computer programs or instructions are executed, the steps of the method described in any one of claims 1-13 or 14-18 are implemented.
- 一种芯片,包括处理器,其特征在于,所述处理器执行权利要求1-13或14-18中任一项所述方法的步骤。 A chip, comprising a processor, wherein the processor executes the steps of the method according to any one of claims 1-13 or 14-18.
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