WO2023160677A1 - 一种通信方法及其装置 - Google Patents

一种通信方法及其装置 Download PDF

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Publication number
WO2023160677A1
WO2023160677A1 PCT/CN2023/078295 CN2023078295W WO2023160677A1 WO 2023160677 A1 WO2023160677 A1 WO 2023160677A1 CN 2023078295 W CN2023078295 W CN 2023078295W WO 2023160677 A1 WO2023160677 A1 WO 2023160677A1
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WIPO (PCT)
Prior art keywords
random access
terminal device
ssb
network device
ros
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PCT/CN2023/078295
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English (en)
French (fr)
Inventor
杨苑青
雷珍珠
周欢
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展讯半导体(南京)有限公司
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Publication of WO2023160677A1 publication Critical patent/WO2023160677A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present application relates to the technical field of communication, and in particular to a communication method and device thereof.
  • the terminal device initiates a random access request through a physical random access channel (Physical Random Access Channel, PRACH). If the RAR from the network device is not received before the random access response (Random Access Response, RAR) time window ends, or the random access request is not received by the network device due to too low transmission power of the random access request, or other reasons If it is successfully detected, it is considered that the random access has failed, and the terminal device needs to send a random access request again to perform random access, which affects the performance of the terminal device.
  • PRACH Physical Random Access Channel
  • the probability that the network device successfully receives the random access request can be increased.
  • the terminal device cannot determine which beam the network device sends the random access response through, and also cannot determine which beam the network device receives the random access response through, so the terminal device may not be able to Received a random access response, resulting in random access failure.
  • the present application discloses a communication method and a device thereof.
  • a terminal device can determine to receive a random access response on a beam associated with the first SSB, which is beneficial to improving the success rate of random access.
  • the embodiment of the present application provides a communication method, the method includes: a terminal device sends a random access request to a network device on at least two ROs; In the random access response of the network device, the first SSB is one of the SSBs associated with the at least two ROs.
  • the first SSB is associated with the ith RO of the at least two ROs, where i is a positive integer greater than or equal to 1.
  • the method may further include: the terminal device receiving first indication information from the network device, where the first indication information is used to indicate i.
  • the method may further include: the terminal device sending second indication information to the network device, where the second indication information is used to indicate i.
  • the terminal device receives the random access response from the network device on the beam associated with the first SSB.
  • the beam associated with the SSB receives a random access response from the network device, wherein the first RA-RNTI is determined according to the time-frequency resource position of the i-th RO.
  • the signal strength of the first SSB is the largest among the SSBs associated with the at least two ROs.
  • the method may further include: the terminal device receiving third indication information from the network device, where the third indication information is used to indicate the first SSB.
  • the terminal device receives third indication information from the network device.
  • a specific implementation manner is: the terminal device receives DCI from the network device, where the DCI includes the third indication information.
  • the third indication information occupies n or bits; wherein, n is the total number of SSBs associated with the above-mentioned at least two ROs, or, n is the total number of SSBs in the serving cell of the terminal device, or, n is the number of SSBs actually used by the serving cell of the terminal device The total number of SSBs.
  • the terminal device receives the random access response from the network device on the beam associated with the first SSB.
  • the random access response from the network device is received on the beam associated with the SSB; wherein, the first RA-RNTI is determined according to the time-frequency resource positions of the above-mentioned at least two ROs, or the first RA-RNTI is determined according to the above-mentioned at least two The time-frequency resource position of an RO in the RO is determined.
  • the embodiment of the present application provides another communication method, the method includes: the network device respectively receives random access requests from the terminal device on at least two ROs; and on the beam associated with the first SSB Sending a random access response to the terminal device, where the first SSB is one of the SSBs associated with the at least two ROs.
  • the first SSB is associated with the ith RO of the at least two ROs, where i is a positive integer greater than or equal to 1.
  • the method may further include: the network device sending first indication information to the terminal device, where the first indication information is used to indicate i.
  • the method may further include: the network device receiving second indication information from the terminal device, where the second indication information is used to indicate i.
  • the network device sends a random access response to the terminal device on the beam associated with the first SSB.
  • the specific implementation manner is: the network device, according to the first RA-RNTI, A random access response is sent to the terminal device on the associated beam, where the first RA-RNTI is determined according to the time-frequency resource position of the i-th RO.
  • the signal strength of the first SSB is the largest among the SSBs associated with the at least two ROs.
  • the method may further include: the network device sending third indication information to the terminal device, where the third indication information is used to indicate the first SSB.
  • the network device sends the third indication information to the terminal device.
  • a specific implementation manner is: the network device sends DCI to the terminal device, and the DCI includes the third indication information.
  • the third indication information occupies n or bits; wherein, n is the total number of SSBs associated with the above-mentioned at least two ROs, or, n is the total number of SSBs in the serving cell of the terminal device, or, n is the SSB actually used by the serving cell of the terminal device the total number of .
  • the network device sends a random access response to the terminal device on the beam associated with the first SSB.
  • the specific implementation manner is: the network device, according to the first RA-RNTI, Send a random access response to the terminal device on the associated beam; wherein, the first RA-RNTI is determined according to the time-frequency resource positions of the at least two ROs, or the first RA-RNTI is determined according to the at least two ROs in the above-mentioned The time-frequency resource position of an RO is determined.
  • the embodiment of the present application provides a communication device, the device includes a communication device for realizing the first aspect or the first aspect A unit of the method described in the second aspect.
  • the embodiment of the present application provides another communication device, including a processor; the processor is configured to execute the method described in the first aspect or the second aspect.
  • the communication device may further include a memory; the memory is used to store a computer program; the processor is specifically used to call the computer program from the memory, and execute the computer program described in the first aspect or the second aspect. Methods.
  • the embodiment of the present application provides a chip, the chip is used to execute the method described in the first aspect or the second aspect.
  • the embodiment of the present application provides a chip module, the chip module includes a communication interface and a chip, wherein: the communication interface is used for internal communication of the chip module, or for the chip module to communicate with external devices ; The chip is used to execute the method described in the first aspect or the second aspect.
  • the embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by a processor, the The processor executes the method described in the first aspect or the second aspect.
  • an embodiment of the present application provides a computer program product including a computer program or an instruction.
  • the computer program or instruction When the computer program or instruction is run on a computer, the computer executes the method described in the first aspect or the second aspect.
  • the network device when the terminal device sends random access requests on at least two ROs respectively, the network device can send a random access response through the beam associated with the first SSB, and the terminal device can send a random access response through the beam associated with the first SSB.
  • the random access response is received on the beam, and the first SSB is one of the SSBs associated with at least two ROs, which helps to improve the possibility that the terminal device receives the random access response, and further helps to improve the random access response. probability of success.
  • FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic flow diagram of a four-step random access provided by an embodiment of the present application
  • FIG. 3 is a schematic flowchart of a communication method provided in an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of another communication method provided by the embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a chip module provided by an embodiment of the present application.
  • 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.
  • FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • the communication system may include, but is not limited to, a terminal device and a network device.
  • the number and configuration of the devices shown in Figure 1 are for example and do not constitute a limitation to the embodiment of the application. In practical applications, two or more Network equipment, two or more terminal equipment.
  • the communication system shown in FIG. 1 includes one terminal device 101 and one network device 102 as an example.
  • the terminal device in the embodiment of the present application is a device with a wireless transceiver function, which can be referred to as a terminal (terminal), user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), access terminal equipment, vehicle terminal equipment, industrial control terminal equipment, UE unit, UE station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE agent or UE device etc.
  • Terminal equipment can be fixed or mobile.
  • the terminal device can support at least one wireless communication technology, such as long-term evolution (long time evolution, LTE), new air interface (new radio, NR), wideband code division multiple access (wideband code division multiple access, WCDMA) wait.
  • the terminal device may be a mobile phone (mobile phone), a tablet computer (pad), a desktop computer, a notebook computer, an all-in-one computer, a vehicle terminal, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grid, transportation Wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, cellular phones, cordless phones, session initiation protocol (SIP) phones, Wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, wearable devices, future mobile
  • PLMN public mobile land mobile network
  • the terminal device may also be a device having a transceiver function, such as a chip module.
  • the chip module may include a chip, and may also include other discrete devices.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.
  • the network device is a device that provides a wireless communication function for the terminal device.
  • the network device may be an access network (AN) device, and the AN device may be a radio access network (RAN) equipment.
  • the access network device may support at least one wireless communication technology, such as LTE, NR, WCDMA and so on.
  • the access network equipment includes but is not limited to: a next-generation base station (generation node B, gNB) in a fifth-generation mobile communication system (5th-generation, 5G), an evolved node B (evolved node B, eNB), Radio network controller (radio network controller, RNC), node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved node B, or home node B, HNB), baseband unit (baseband unit, BBU), TRP, transmission point (transmitting point , TP), Mobile Switching Center, etc.
  • a next-generation base station generation node B, gNB
  • 5G fifth-generation mobile communication system
  • eNB evolved node B
  • RNC Radio network controller
  • node B node B
  • base station controller base station controller
  • BTS base transceiver station
  • home base station for example, home evolved node B, or
  • the network device may also be a wireless controller, a centralized unit (centralized unit, CU) and/or a distributed unit (distributed unit, DU) in a cloud radio access network (cloud radio access network, CRAN) scenario, or an access network device It can be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, and an access network device in future mobile communications or an access network device in a future evolved PLMN.
  • the network device may also be a device that provides a wireless communication function for the terminal device, such as a chip module.
  • the chip module may include a chip, and may also include other discrete devices.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.
  • the technical solutions of the embodiments of the present application may be applied to various communication systems.
  • LTE communication system 4th generation (4th generation, 4G) mobile communication system
  • 5G mobile communication system 5G NR system.
  • the method in this embodiment of the present application is also applicable to various communication systems in the future, such as 6G systems or other communication networks.
  • the random access process can enable the terminal device to access the network and establish a connection with the network.
  • the random access process can be divided into a four-step random access process and a two-step random access process.
  • the four-step random access process may include four messages Msg1, Msg2, Msg3 and Msg4.
  • FIG. 2 it is a schematic flowchart of a four-step random access process.
  • the terminal device sends a random access request to the network device through a Physical Random Access Channel (PRACH).
  • the random access request may also be called message 1 (Msg1).
  • the random access request may include a random access preamble (random access preamble, RA preamble).
  • RA preamble is used to request access to the network, that is, the main function of the RA preamble is to inform the network device that there is a random access request, and enable the network device to estimate the transmission delay with the terminal device.
  • the RA preamble random access preamble
  • the RA preamble is used to request access to the network, that is, the main function of the RA preamble is to inform the network device that there is a random access request, and enable the network device to estimate the transmission delay with the terminal device.
  • the network device receives the random access request and sends a random access response (Random Access Response, RAR) to the terminal device.
  • RAR Random Access Response
  • Msg2 message 2
  • the network device sends the RAR to the terminal device on a PDSCH (Physical Downlink Shared Channel, physical downlink shared channel) payload (payload) resource.
  • PDSCH Physical Downlink Shared Channel
  • payload payload
  • the RAR 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 After the terminal device sends the RA preamble, it monitors in the RAR time window (window). Listen to the PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) scrambled by the RA-RNTI to receive the RAR corresponding to the RA-RNTI. If no RAR is received within the RAR time window, it is considered that the random access procedure has failed. If the terminal device successfully uses the RA-RNTI to parse the PDCCH to obtain downlink control information (Downlink Control Information, DCI), then the terminal device tries to use the RA-RNTI to parse the PDSCH payload according to the DCI. Each random access request corresponds to an RA preamble ID (or RA preamble index).
  • PDCCH Physical Downlink Control Channel, Physical Downlink Control Channel
  • the terminal device If the terminal device successfully decodes the PDSCH payload, it will check whether the random access preamble identity (RAPID) is the same as that sent by Msg1 The RA preamble ID used at the time is the same. If they are the same, Msg2 is successfully demodulated, and the terminal device can stop listening to the RAR at this time.
  • RAPID random access preamble identity
  • the terminal device receives the RAR and sends 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.
  • the only identifier of the terminal device is C-RNTI (Cell Radio Network Temporary Identifier, wireless network temporary identifier); another example, for non-RRC_CONNECTED
  • the only identifier of the terminal device is the unique terminal device identifier from the core network (such as S-TMSI (SAE Temporary Mobile Subscriber Identifier, s Temporary Mobile Subscriber Identifier) or a random number).
  • 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.
  • the PDSCH received by the terminal device in Msg4 is scrambled by the TC-RNTI (Temporary Cell Radio Network Temporary Identifier) specified in the RAR message, the successfully decoded MAC (Medium Access Control, Media Access control) UE CRID (Contention Resolution Identity, contention resolution identity) MAC CE (control element, control element) contained in PDU (Protocol Data Unit, protocol data unit) and CCCH (Common Control Channel, common control channel) sent by Msg3 ) SDU (service Data Unit, service data unit) match, the terminal device will consider the random access successful and convert its own TC-RNTI to C-RNTI.
  • TC-RNTI Temporary Cell Radio Network Temporary Identifier
  • Msg1 and Msg2 mainly complete uplink time synchronization; while the main purpose of Msg3 and Msg4 is to specify a unique and legal identity for the terminal device for subsequent data transmission.
  • RA preamble is used to request access to the network and inform the network device that there is a random access request.
  • the RA preamble can be used for network devices to distinguish terminal devices that initiate random access during random access, and can also be used for other purposes, which are not limited in this embodiment of the application.
  • a cell has 64 available RA preambles, which form 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 A random access channel opportunity (PRACH occasion, RO) is used for transmission, that is, the RA preamble is carried (or transmitted) by the PRACH occasion.
  • PRACH occasion RO
  • RA-RNTI Random Access Radio Network Temporary Identifier
  • the terminal device when the terminal device sends Msg1, it will calculate and save the RA-RNTI. After the network device receives the Msg1, it will also calculate the RA-RNTI, and the RAR is obtained by scrambling the RA-RNTI. Therefore, only the terminal device that sends Msg1 at the time-frequency resource position identified by the RA-RNTI can successfully decode the RAR.
  • s_id represents the index of the first orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol of RO, and the value is 0 ⁇ s_id ⁇ 14;
  • t_id represents the first slot of RO (in a system frame ) index, the value is 0 ⁇ t_id ⁇ 80;
  • f_id represents the index of RO in the frequency domain, the value is 0 ⁇ f_id ⁇ 8;
  • ul_carrier_id represents the uplink carrier used to transmit RA preamble, and the value 0 represents the conventional uplink A normal uplink (NUL) carrier, and a value of 1 indicates a supplementary uplink (SUL) carrier.
  • Scrambling is a digital signal processing method, using the scrambling code and the original signal XOR operation to obtain a new signal.
  • the function of uplink physical channel scrambling is to distinguish different terminal devices, and downlink scrambling can distinguish cells and channels.
  • the scrambling code can be used to scramble and descramble the original signal.
  • the scrambling code may scramble downlink control information (DCI), or may also be referred to as scrambling the PDCCH.
  • Scrambling the DCI specifically refers to scrambling a cyclic redundancy check (cyclic redundancy check, CRC) field of the DCI.
  • CRC cyclic redundancy check
  • the terminal device descrambles the received DCI, specifically, the terminal device descrambles the CRC field of the DCI using a corresponding type of scrambling code to determine the format or type of the DCI.
  • the scrambling code may include a random access radio network temporary identifier (random access radio network temporary identifier, RA-RNTI).
  • FIG. 3 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the communication method may include but not limited to the following steps:
  • the terminal device sends random access requests to the network device respectively on at least two ROs.
  • the network device respectively receives random access requests from the terminal device on the at least two ROs.
  • a terminal device can send a random access request on an RO.
  • the fact that the terminal device sends random access requests on at least two ROs indicates that the terminal device sends a random access request on each of the at least two ROs.
  • the terminal device sends a random access request to the network device on RO1 and RO2 respectively, which can be understood as: the terminal device sends a random access request to the network device on RO1, And send a random access request to the network device on RO2.
  • the random access request sent on RO1 and the random access request sent on RO2 may be independent of each other.
  • the random access request in S301 may also be called Msg1, and the random access request includes an RA preamble.
  • the terminal device may perform the following steps: (1) Select the SSB. (2) According to the relationship between SSB and RO, select the RO associated with the SSB selected in step (1), and then select an RA preamble from the RA preamble available on the selected RO, and Msg1 contains the RA preamble or the The ID or index of the RA preamble. Optionally, the number of RA preambles available on each RO is 64. It should be noted that the RA preamble in the random access requests respectively sent by the terminal device on at least two ROs is the same. (3) Select a PRACH resource for carrying the RA preamble. (4) Calculate RA-RNTI. After sending Msg1, the terminal device receives a random access response according to the RA-RNTI.
  • each beam may be associated with at least one SSB, and the beams associated with different SSBs may be the same or different.
  • Beams associated with the SSBs associated with the at least two ROs may be the same or different.
  • RO1 is associated with SSB1, RO2 is associated with SSB2, and RO3 is associated with SSB2.
  • SSB1 is associated with beam 1
  • SSB2 is associated with beam 2.
  • both SSB1 and SSB2 are associated with beam 1. It should be noted that the SSBs associated with RO1, RO2, and RO3 may also be different.
  • the mapping relationship (or association relationship, correspondence relationship) between SSB and RO can be indicated by the high-level parameter SSB-per-rach-occasion (N).
  • N the high-level parameter SSB-per-rach-occasion
  • the number of configurable ROs in the frequency domain is configured by the high layer parameter msg1-FDM. For example, the number of ROs in the frequency domain may be ⁇ 1, 2, 4, 8 ⁇ .
  • the number of RA preambles available on each RO is 64, where the number of RA preambles available for each SSB is indicated by the high-layer parameter CB-PreamblesPerSSB(R).
  • CB-PreamblesPerSSB(R) the high-layer parameter
  • N SSBs are associated with one RO
  • SSB n can select one of the R RA preambles to send Msg1, 0 ⁇ n ⁇ N-1
  • n refers to the SSB index
  • the SSB n The index of the associated RA preamble is from start.
  • 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 device sends a random access response to the terminal device on a beam associated with a first SSB, where the first SSB is one of SSBs associated with at least two ROs.
  • the terminal device receives the random access response on the beam associated with the first SSB.
  • the network device when the terminal device sends random access requests on at least two ROs, can send a random access response through the beam associated with the first SSB, and the terminal device can send a random access response through the beam associated with the first SSB.
  • the beam receives the random access response
  • the first SSB is one of the SSBs associated with at least two ROs, which helps to improve the possibility that the terminal device receives the random access response, and further improves the probability of successful random access. probability.
  • the first SSB may be pre-agreed between the terminal device and the network device in the following manner:
  • the first SSB is the SSB associated with the i-th RO among the at least two ROs, and i is a positive integer greater than or equal to 1.
  • mode 1 refer to the embodiment corresponding to FIG. 4 .
  • Manner 2 The network device sends third indication information to the terminal device to indicate the first SSB.
  • mode 2 For a specific description of mode 2, refer to the embodiment corresponding to FIG. 5 .
  • the network device sends a random access response to the terminal device on the beam associated with the first SSB according to the first RA-RNTI.
  • the terminal device receives the random access response on the beam associated with the first SSB according to the first RA-RNTI.
  • the network device sends a random access response to the terminal device on the beam associated with the first SSB according to the first RA-RNTI, including: after the network device uses the first RA-RNTI to scramble the RAR, and Send a PDCCH to the terminal device on the beam associated with the first SSB, the PDCCH is scrambled by the first RA-RNTI; then send a PDSCH to the terminal device on the beam associated with the first SSB, RAR is carried in the PDSCH payload, the PDCCH Used to schedule the PDSCH.
  • the RO used to calculate the first RA-RNTI is associated with the first SSB.
  • the terminal device receives the random access response on the beam associated with the first SSB according to the first RA-RNTI, including: within the RAR time window, the terminal device listens on the beam associated with the first SSB by the first RA-RNTI scrambled PDCCH, if the PDCCH scrambled by the first RA-RNTI is monitored, receive the PDSCH on the beam associated with the first SSB according to the monitored PDCCH, and use the first RA-RNTI to demodulate the PDSCH payload to get RAR.
  • the first RA-RNTI is determined according to the time-frequency resource positions of the at least two ROs. For example, take the above at least two ROs as RO1, RO2 and RO3 as an example.
  • the first RA-RNTI may be determined according to the time-frequency resource positions of RO1, RO2, and RO3.
  • the specific process is: the first OFDM symbol of RO1
  • the index of the OFDM symbol, the index of the first slot of RO1, the index of RO1 in the frequency domain, and the uplink carrier used to transmit the RA preamble are substituted into formula (1) to obtain the RA-RNTI corresponding to RO1; and the first slot of RO2
  • the index of OFDM symbols, the index of the first slot of RO2, the index of RO2 in the frequency domain, and the uplink carrier used to transmit the RA preamble are substituted into formula (1) to obtain the RA-RNTI corresponding to RO2;
  • the first slot of RO3 The index of OFDM symbols, the index of the first slot of RO3, the index of RO3 in the frequency domain, and the uplink carrier used to transmit the RA preamble are substituted into formula (1) to obtain the RA-RNTI corresponding to RO3; then, according to
  • the RA-RNTIs corresponding to the above RO1, RO2, and RO3 are respectively determined by the time-frequency resource positions of the respective ROs. Determine the location of the frequency resource. For example, taking the above-mentioned at least two ROs as RO1, RO2 and RO3 as an example, the RA-RNTI corresponding to RO1 can be determined by the time-frequency resource location of RO1, and the RA-RNTI corresponding to RO2 and RO3 can be determined by the RA-RNTI of RO3. The location of the time-frequency resource is determined.
  • the first RA-RNTI may also be determined according to time-frequency resource locations of two or more ROs in the at least two ROs. For example, take the above at least two ROs as RO1, RO2 and RO3 as an example.
  • the first RA-RNTI may be determined according to the time-frequency resource positions of the first two ROs (ie, RO1 and RO2).
  • the specific process is: substituting the time-frequency resource positions of RO1 and RO2 into the formula (1) to obtain the RA-RNTI corresponding to RO1 and RO2 respectively (the method is the same as that of determining the RA-RNTI corresponding to RO in the previous example , will not be described here); then determine the first RA-RNTI according to the RA-RNTI corresponding to RO1 and the RA-RNTI corresponding to RO2 (for example, take an average value).
  • the first RA-RNTI may be determined according to the time-frequency resource position of one of the at least two ROs.
  • the first RA-RNTI is determined according to the time The location of the frequency resource is determined.
  • the first RA-RNTI may be determined according to the time-frequency resource location of the first RO (ie, RO1).
  • the index of the first OFDM symbol of RO1 is substituted into formula (1) to obtain the RA-RNTI corresponding to RO1
  • the first RA-RNTI is the RA-RNTI corresponding to RO1.
  • the first RA-RNTI is determined according to the time-frequency resource position of the second RO among the above at least two ROs, or, the first RA-RNTI is determined according to the time-frequency resource position of the last RO among the above-mentioned at least two ROs definite.
  • the terminal device after the terminal device sends random access requests on at least two ROs, it can determine the RA-RNTI corresponding to the RO according to the time-frequency resource position of each RO in the at least two ROs. value; the terminal device listens to the PDCCH in the RAR time window to obtain the DCI according to the value of the RA-RNTI corresponding to the RO, and 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. For example, after the terminal device sends random access requests on at least two ROs, in the RAR time window, it can monitor PDCCHs under different beams in each slot (slot) in a beam sweeping manner.
  • 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, the next moment is sent in another direction; finally through continuous Changing the beam direction can increase the coverage of the cell.
  • the at least two ROs are RO1 and RO2 respectively as an example, where RO1 is associated with SSB0, RO2 is associated with SSB1; SSB0 is associated with beam 1, and SSB1 is associated with beam 2.
  • the terminal device After the terminal device sends a random access request on RO1 and RO1 respectively, in the RAR time window, the terminal device takes turns listening to the PDCCH scrambled by the RA-RNTI corresponding to RO1 on beam 1 and listening to the PDCCH corresponding to RO2 on beam 2. PDCCH scrambled by RA-RNTI.
  • the terminal device may determine the value of the first RA-RNTI according to the time-frequency resource position of one RO in the at least two ROs; the terminal In the RAR time window, the device monitors the PDCCH according to the value of the first RA-RNTI to obtain the DCI; then, receives and parses the PDSCH payload according to the obtained DCI to obtain the RAR message.
  • the terminal device determines the value of the first RA-RNTI according to the time-frequency resource position of the first RO in the at least two ROs as an example, the terminal device is on RO1 and RO2 After sending random access requests respectively, the terminal device can determine the value of the first RA-RNTI according to the time-frequency resource position of RO1; then, in the RAR time window, monitor the PDCCH scrambled by the value of the first RA-RNTI.
  • the network device scrambles the random access response through the determined RA-RNTI value
  • the terminal device scrambles the random access response through the determined RA-RNTI value
  • the value of RA-RNTI descrambles the random access response. Therefore, the RA-RNTI values determined by the terminal device and the network device are consistent, which is beneficial to ensure that the terminal device successfully demodulates the DCI and the random access response.
  • the network device when the terminal device sends random access requests on at least two ROs respectively, the network device can send a random access response through the beam associated with the first SSB, and the terminal device can send a random access response through the beam associated with the first SSB.
  • the random access response is received on the beam, and the first SSB is one of the SSBs associated with at least two ROs, which helps to improve the possibility that the terminal device receives the random access response, and further helps to improve the random access response. probability of success.
  • the value of RA-RNTI determined by the terminal device and the network device is consistent, which is beneficial to ensure that the terminal device The device successfully demodulates the DCI and the random access response.
  • FIG. 4 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • the embodiment corresponding to FIG. 4 mainly describes that the first SSB is the SSB associated with the i-th RO among the aforementioned at least two ROs.
  • the communication method may include but not limited to the following steps:
  • the terminal device sends random access requests on at least two ROs respectively.
  • the network device respectively receives random access requests from the terminal device on at least two ROs.
  • step S401 for the execution process of step S401, reference may be made to the specific description of step S301 in FIG. 3 , which will not be repeated here.
  • the network device sends a random access response to the terminal device on the beam associated with the first SSB, where the first SSB is associated with the i-th RO among the aforementioned at least two ROs, and i is a positive integer greater than or equal to 1 .
  • the terminal device receives the random access response on the beam associated with the first SSB.
  • i can be preset by the protocol, or, i can be determined by the network device and the network device indicates the value of i to the terminal device.
  • the network device sends the first indication information to the terminal device, and the first indication information Used to indicate i.
  • the terminal device receives the first indication information.
  • the first indication information may be system information.
  • i may be determined by the terminal device and the terminal device instructs the network device to take the value of i.
  • the terminal device sends second indication information, where the second indication information is used to indicate i.
  • the network device receives the second indication information from the terminal device. For example, the terminal device associates the i-th RO among the at least two ROs with the first SSB, and then the terminal device sends the second indication information to the network device.
  • the second indication information may explicitly indicate the value of i, for example, the second indication information carries the value of i.
  • the second indication information may implicitly indicate the value of i.
  • the terminal device may send an RA preamble to the network device to implicitly indicate the value of i.
  • the terminal device may send an RA preamble to the network device to implicitly indicate the value of i.
  • the value of i indicated by the index of RA preamble as an example, if the number of available RA preambles is 64, the value range of the index of RA preamble is [0,1,2,3...61,62,63] , if the index of the RA preamble sent by the terminal device is 3, then the value of i can be 3.
  • the second indication information may be carried in Msg1 in the four-step random access process, or in message A (also referred to as MsgA) in the two-step random access process. It can be understood that, when the terminal equipment is in the RRC_CONNECTED state, the second indication information may be carried in the system information.
  • the first SSB may be determined according to the signal strengths of the aforementioned at least two RO-associated SSBs.
  • the signal strength of the first SSB is the largest among the SSBs associated with the aforementioned at least two ROs.
  • the terminal device may measure the reference signal receiving power (Reference Signal Receiving Power, RSRP) of the SSB, and determine the SSB with the largest RSRP value as the first SSB.
  • RSRP Reference Signal Receiving Power
  • the signal strength of the first SSB ranks in the top a position of the SSBs associated with the aforementioned at least two ROs.
  • the signal strength of the first SSB is greater than a preset signal strength threshold.
  • b is a positive integer greater than or equal to 2
  • a may be a positive integer greater than or equal to 1 and less than b.
  • the first SSB may be an SSB associated with a beam selected by the terminal device for receiving the random access response (ie, Msg2).
  • the terminal device may associate the SSB associated with the beam selected for receiving the random access response (that is, Msg2) with the i-th RO, that is, establish the first SSB The association relationship with the i-th RO.
  • the terminal device receives the random access response on the beam associated with the first SSB, including: The terminal device receives the random access response on the beam associated with the first SSB according to the first RA-RNTI, where the first RA-RNTI is determined according to the time-frequency resource position of the i-th RO.
  • the network device sends a random access response to the terminal device on the beam associated with the first SSB, including: the network device sends a random access response to the terminal device on the beam associated with the first SSB according to the first RA-RNTI. enter the response.
  • the terminal device may Determine the value of the first RA-RNTI at the time-frequency resource location; then monitor the PDCCH scrambled by the value of the first RA-RNTI in the RAR time window to obtain DCI, and use the value of the first RA-RNTI to parse the PDSCH according to the DCI payload, to receive the RAR message obtained by scrambling the value of the first RA-RNTI.
  • the value of i is specified, and the network device sends a random access response on the beam associated with the SSB (first SSB) associated with the i-th RO among the aforementioned at least two ROs.
  • the terminal device can receive the PDSCH on the beam associated with the first SSB, and then demodulate the PDSCH payload to obtain a random access response, which helps to improve the possibility of the terminal device receiving the random access response, and further improves the random access response. probability of success.
  • FIG. 5 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • the embodiment in FIG. 5 mainly describes how to indicate the first SSB through the third indication information.
  • the communication method may include but not limited to the following steps:
  • the terminal device sends random access requests on at least two ROs respectively.
  • the network device respectively receives random access requests from the terminal device on at least two ROs.
  • step S501 for the execution process of step S501, reference may be made to the specific description of step S301 in FIG. 3 , which will not be repeated here.
  • the network device sends third indication information to the terminal device, where the third indication information is used to indicate the first SSB, where the first SSB is one of the SSBs associated with the aforementioned at least two ROs.
  • the terminal device receives the third indication information.
  • the first SSB is an SSB associated with a beam used by the terminal device to receive the random access response.
  • the third indication information is indicated by the network device to the terminal device through the DCI.
  • the network device sends the DCI, and correspondingly, the terminal device receives the DCI, where the DCI includes the third indication information.
  • the terminal device sends Msg1 (including random access requests) on at least two ROs respectively, and then the network device can send PDCCH DCI in a beam scanning manner, and the DCI indicates which beam the network device uses to send Msg2.
  • the terminal device After decoding the DCI on any beam, the terminal device does not need to perform beam scanning, but can directly receive the PDSCH on the beam associated with the first SSB indicated by the DCI, and then demodulate the PDSCH payload to obtain a random access response.
  • the terminal device decodes the DCI, it knows that the network device sends a random access response on the beam associated with the first SSB, so the terminal device can directly monitor the PDSCH on the beam associated with the first SSB without scanning the beam. monitor the PDSCH in the same way. During the beam scanning process, the beam needs to be changed frequently, and the terminal device directly monitors the PDSCH on the beam associated with the first SSB, which is beneficial to reduce the monitoring time and the power consumption of the terminal device.
  • the above-mentioned at least two ROs are RO1, RO2, and RO3 respectively, and RO1 is associated with SSB0, RO2 is associated with SSB1, and RO3 is associated with SSB2; SSB0 is associated with beam 1, SSB1 is associated with beam 2, and SSB2 is associated with beam 3 as an example.
  • the terminal device sends random access requests on RO1, RO2, and RO3 respectively.
  • the network device After receiving the random access request, the network device, Send PDCCH DCI on beam 1, beam 2, and beam 3 in turn, and then send PDSCH on beam 3, wherein the DCI instructs the network device to send a random access response through the beam associated with SSB2 (ie, beam 3).
  • the terminal device After the terminal device sends a random access request, it listens to the PDCCH on beam 1, beam 2, and beam 3 in turn; if the terminal device monitors the PDCCH on beam 3, then the terminal device decodes the DCI and learns the beam associated with the network device through SSB2 (that is, beam 3) to send a random access response; then, the terminal device can directly monitor the PDSCH on beam 3 without switching beams, and then demodulate the PDSCH payload to obtain a random access response.
  • SSB2 that is, beam 3
  • the third indication information may occupy n or bits; among them, is an upward rounding function, n is the total number of SSBs associated with the aforementioned at least two ROs, or, n is the total number of SSBs in the serving cell of the terminal device, or, n is the number of SSBs actually used by the serving cell of the terminal device The total number of SSBs.
  • the serving cell of the terminal device may be understood as the cell where the SSBs associated with the at least two ROs are located.
  • the SSB actually used by the serving cell of the terminal device refers to: the total number of SSBs indicated by the network device to the terminal device, that is, the total number of SSBs actually sent by the network device to the terminal device.
  • the total number of SSBs in cell a is 8, but the actual number of SSBs sent is less than 8.
  • the cell does not need to send all SSBs.
  • using 6-bit information to instruct the network device on the beam associated with the SSB to send the random access response can save the number of bits occupied by the third indication information.
  • the aforementioned at least two (such as m) RO-associated SSBs may be SSBs with the top m signal strengths in the serving cell of the terminal device.
  • the terminal device may select beams associated with 4 SSBs with better signal strengths among the 6 SSBs to send Msg1.
  • a bit field may be extended in the reserved bit (reserve bit) of the DCI to indicate the beam associated with the SSB on which the network device sends the random access response, that is, n or bits may be reserved bits in DCI.
  • each of the n bits corresponding to the n bits corresponds to an SSB
  • the first SSB can be the n bits
  • the first preset value is 1, and if the value of the 4 bits occupied by the third indication information is 1000, then the first SSB is the 4 bits occupied by the third indication information The first bit in the bit corresponds to the SSB. If the value of the 4 bits occupied by the third indication information is 0100, then the first SSB is the SSB corresponding to the second bit in the 4 bits occupied by the third indication information.
  • the third indication information occupies In the case of bits, the first SSB is the bits corresponding to The SSB corresponding to the value of each bit. It should be noted, Each value of bits can correspond to an SSB, or, The partial value of bits corresponds to an SSB.
  • the arrangement is: SSB0, SSB1, SSB2, and SSB3 as an example, then the SSBs corresponding to the values of 2 bits 00, 01, 10, and 11 are: SSB0, SSB1, SSB2, and SSB3. If the value of the 2 bits occupied by the third indication information is 00, then the first SSB is SSB0. If the value of the 2 bits occupied by the third indication information is 11, then the first SSB is SSB3.
  • n represents the total number of SSBs actually used by the serving cell of the terminal device
  • the SSBs actually used by the serving cell of the terminal device are arranged in ascending order of SSB index as follows: : SSB0, SSB3, SSB4, SSB5, SSB6, and SSB7 as an example
  • the SSBs corresponding to the values of 3 bits 000, 001, 010, 011, 100, and 101 are: SSB0, SSB3, SSB4, SSB5, and SSB6 , SSB7.
  • the DCI sent by the network device may carry the foregoing third indication information.
  • the DCI sent by the network device may not carry the third indication information.
  • the network device sends a random access response to the terminal device on the beam associated with the first SSB.
  • the terminal device receives the random access response on the beam associated with the first SSB.
  • step S503 For the execution process of step S503, reference may be made to the specific description of step S302 in FIG. 3 , which will not be repeated here.
  • the network device sends a random access response on the beam associated with the first SSB, and indicates the first SSB through the third indication information, so that the terminal device can directly receive the PDSCH on the beam associated with the first SSB, Then, the PDSCH payload is demodulated to obtain a random access response, which helps to improve the possibility that the terminal device receives the random access response, and further helps to improve the probability of successful random access.
  • FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 60 includes a sending unit 601 and a receiving unit 602 .
  • the communication device 60 may execute relevant steps of the terminal device and the network device in the foregoing method embodiments.
  • a sending unit 601, configured to respectively send random access requests to network devices on at least two ROs;
  • a receiving unit 602 configured to receive a random access response from the network device on a beam associated with the first SSB,
  • the first SSB is one of the SSBs associated with the at least two ROs.
  • the first SSB is associated with the ith RO of the at least two ROs, where i is a positive integer greater than or equal to 1.
  • the receiving unit 602 may also be configured to: receive first indication information from the network device, where the first indication information is used to indicate i.
  • the sending unit 601 may also be configured to: send second indication information to the network device, where the second indication information is used to indicate i.
  • the receiving unit 602 when configured to receive the random access response from the network device on the beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, The beam associated with the SSB receives a random access response from the network device, wherein the first RA-RNTI is determined according to the time-frequency resource position of the i-th RO.
  • the signal strength of the first SSB is the largest among the SSBs associated with the at least two ROs.
  • the receiving unit 602 may also be configured to: receive third indication information from the network device, where the third indication information is used to indicate the first SSB.
  • the receiving unit 602 when configured to receive the third indication information from the network device, it is specifically configured to: receive DCI from the network device, where the DCI includes the third indication information.
  • the third indication information occupies n or bits; wherein, n is the total number of SSBs associated with the above-mentioned at least two ROs, or, n is the total number of SSBs in the serving cell of the terminal device, or, n is the number of SSBs actually used by the serving cell of the terminal device The total number of SSBs.
  • the receiving unit 602 when configured to receive the random access response from the network device on the beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, The random access response from the network device is received on the beam associated with the SSB; wherein, the first RA-RNTI is determined according to the time-frequency resource positions of the above-mentioned at least two ROs, or the first RA-RNTI is determined according to the above-mentioned at least two The time-frequency resource position of an RO in the RO is determined.
  • a receiving unit 602 configured to respectively receive random access requests from terminal devices on at least two ROs;
  • the sending unit 601 is configured to send a random access response to the terminal device on a beam associated with a first SSB, where the first SSB is one of the SSBs associated with the at least two ROs.
  • the first SSB is associated with the ith RO of the at least two ROs, where i is a positive integer greater than or equal to 1.
  • the sending unit 601 may also be configured to: send first indication information to the terminal device, where the first indication information is used to indicate i.
  • the receiving unit 602 may also be configured to: receive second indication information from the terminal device, where the second indication information is used to indicate i.
  • the sending unit 601 is configured to send a message to the terminal device on the beam associated with the first SSB When sending a random access response, it is specifically used to: send a random access response to the terminal device on the beam associated with the first SSB according to the first RA-RNTI, where the first RA-RNTI is based on the i-th RO The location of the time-frequency resource is determined.
  • the signal strength of the first SSB is the largest among the SSBs associated with the at least two ROs.
  • the sending unit 601 may also be configured to: send third indication information to the terminal device, where the third indication information is used to indicate the first SSB.
  • the sending unit 601 when configured to send the third indication information to the terminal device, it is specifically configured to: send DCI to the terminal device, where the DCI includes the third indication information.
  • the third indication information occupies n or bits; wherein, n is the total number of SSBs associated with the above-mentioned at least two ROs, or, n is the total number of SSBs in the serving cell of the terminal device, or, n is the SSB actually used by the serving cell of the terminal device the total number of .
  • the sending unit 601 when configured to send the random access response to the terminal device on the beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, when the beam associated with the first SSB Send a random access response to the terminal device on the associated beam; wherein, the first RA-RNTI is determined according to the time-frequency resource positions of the at least two ROs, or the first RA-RNTI is determined according to the at least two ROs in the above-mentioned The time-frequency resource position of an RO is determined.
  • FIG. 7 is another communication device 70 provided in the embodiment of the present application. It can be used to realize the functions of the terminal device in the above method embodiments, or realize the functions of the network device in the above method embodiments.
  • the communication device 70 may include a transceiver 701 and a processor 702 .
  • the communication device may further include a memory 703 .
  • the transceiver 701, the processor 702, and the memory 703 may be connected through a bus 704 or in other ways.
  • the bus is represented by a thick line in FIG. 7 , and the connection manners between other components are only for schematic illustration and are not limited thereto.
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 7 , but it does not mean that there is only one bus or one type of bus.
  • the coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the specific connection medium among the transceiver 701, the processor 702, and the memory 703 is not limited.
  • the memory 703 may include read-only memory and random-access memory, and provides instructions and data to the processor 702 .
  • a portion of memory 703 may also include non-volatile random access memory.
  • the processor 702 can be a central processing unit (Central Processing Unit, CPU), and the processor 702 can also be other general processors, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC ), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor, and optionally, the processor 702 may also be any conventional processor.
  • the processor in FIG. 7 may execute the method performed by the terminal device in any of the foregoing method embodiments.
  • the processor in FIG. 7 can execute any of the above methods The method performed by the network device in the method embodiment.
  • the memory 703 is used to store program instructions; the processor 702 is used to call the program instructions stored in the memory 703, so as to execute the terminal device, Steps performed by network devices.
  • the functions/implementation process of the sending unit and the receiving unit in FIG. 6 can be implemented by calling the computer-executed instructions stored in the memory 703 by the processor 702 in FIG. 7 .
  • the functions/implementation process of the sending unit and the receiving unit in FIG. 5 may be implemented by the transceiver 701 in FIG. 7 .
  • a computer including CPU, random access storage medium (Random Access Memory, RAM), read-only storage medium (Read-Only Memory, ROM) and other processing elements and storage elements
  • a computer program (including program code) capable of executing each step involved in the above method is run on the device, and the method provided by the embodiment of the present application is realized.
  • the computer program can be recorded on, for example, a computer-readable recording medium, loaded into the above-mentioned computing device via the computer-readable recording medium, and executed therein.
  • the problem-solving principle and beneficial effect of the communication device 70 provided in the embodiment of the application are similar to the problem-solving principle and beneficial effect of the terminal equipment and network equipment in the method embodiment of the application. Please refer to the principle of implementation of the method and beneficial effects, for brief description, no longer repeat them here.
  • the foregoing communication devices may be, for example, a chip or a chip module.
  • the embodiment of the present application also provides a chip, which can execute the relevant steps of the terminal device and the network device in the foregoing method embodiments.
  • the chip is configured to: respectively send random access requests to network devices on at least two ROs; and receive a random access response from the network device on beams associated with the first SSB, the first SSB being the same as the at least two One of the SSBs associated with ROs.
  • the SSB is associated with the ith RO among the at least two ROs, where i is a positive integer greater than or equal to 1.
  • the chip may also be configured to: receive first indication information from the network device, where the first indication information is used to indicate i.
  • the chip may also be configured to: send second indication information to the network device, where the second indication information is used to indicate i.
  • the chip when configured to receive a random access response from a network device on a beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, when associated with the first SSB A random access response from the network device is received on the associated beam, wherein the first RA-RNTI is determined according to the time-frequency resource position of the i-th RO.
  • the signal strength of the first SSB is the largest among the SSBs associated with the at least two ROs.
  • the chip may also be configured to: receive third indication information from the network device, where the third indication information is used to indicate the first SSB.
  • the chip when configured to receive the third indication information from the network device, it is specifically configured to: receive DCI from the network device, where the DCI includes the third indication information.
  • the third indication information occupies n or bits; among them, n is the same as the above
  • the total number of SSBs associated with the at least two ROs, or n is the total number of SSBs in the serving cell of the terminal device, or n is the total number of SSBs actually used by the serving cell of the terminal device.
  • the chip when configured to receive a random access response from a network device on a beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, when associated with the first SSB Receive a random access response from the network device on the associated beam; wherein, the first RA-RNTI is determined according to the time-frequency resource positions of the at least two ROs above, or the first RA-RNTI is determined according to the at least two ROs above The time-frequency resource position of an RO in the RO is determined.
  • the chip is configured to: respectively receive random access requests from the terminal device on at least two ROs; and send a random access response to the terminal device on a beam associated with the first SSB, the first SSB being the same as the at least two One of the SSBs associated with ROs.
  • the first SSB is associated with the ith RO of the at least two ROs, where i is a positive integer greater than or equal to 1.
  • the chip may also be configured to: send first indication information to the terminal device, where the first indication information is used to indicate i.
  • the chip may also be configured to: receive second indication information from the terminal device, where the second indication information is used to indicate i.
  • the chip when configured to send a random access response to the terminal device on the beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, when associated with the first SSB A random access response is sent to the terminal device on the beam of , wherein the first RA-RNTI is determined according to the time-frequency resource position of the i-th RO.
  • the signal strength of the first SSB is the largest among the SSBs associated with the at least two ROs.
  • the chip may also be configured to: send third indication information to the terminal device, where the third indication information is used to indicate the first SSB.
  • the chip when configured to send the third indication information to the terminal device, it is specifically configured to: send DCI to the terminal device, where the DCI includes the third indication information.
  • the third indication information occupies n or bits; wherein, n is the total number of SSBs associated with the above-mentioned at least two ROs, or, n is the total number of SSBs in the serving cell of the terminal device, or, n is the SSB actually used by the serving cell of the terminal device the total number of .
  • the chip when configured to send a random access response to the terminal device on the beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, when associated with the first SSB Send a random access response to the terminal device on the beam; wherein, the first RA-RNTI is determined according to the time-frequency resource positions of the at least two ROs, or the first RA-RNTI is determined according to one of the at least two ROs The location of the time-frequency resource of the RO is determined.
  • the above-mentioned chip includes at least one processor, at least one first memory, and at least one second memory; wherein, the aforementioned at least one first memory and the aforementioned at least one processor are interconnected by a wire, Instructions are stored in the aforementioned first memory; the aforementioned at least one second memory and the aforementioned at least one processor are interconnected through lines, and the aforementioned second memory stores data that needs to be stored in the aforementioned method embodiments.
  • each module contained therein may be implemented by means of hardware such as circuits, or at least some of the modules may be implemented by means of software programs, which run on the internal integrated components of the chip.
  • the processor and the remaining (if any) modules can be realized by hardware such as circuits.
  • FIG. 8 is a schematic structural diagram of a chip module provided by an embodiment of the present application.
  • the chip module 80 can execute related steps of the terminal device and the network device in the foregoing method embodiments, and the chip module 80 includes: a communication interface 801 and a chip 802 .
  • the communication interface is used for internal communication of the chip module, or for the chip module to communicate with external devices; the chip is used to realize the functions of the terminal device and network device in the embodiment of the application, see Figure 3-figure for details 5 corresponds to the embodiment.
  • the chip module 80 may further include a storage module 803 and a power module 804 .
  • the storage module 803 is used for storing data and instructions.
  • the power supply module 804 is used to provide power for the chip module.
  • each module contained therein may be realized by hardware such as a circuit, and different modules may be located in the same component of the chip module (such as a chip, a circuit module, etc.) or Among the different components, or at least some of the modules 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 can be realized by means of hardware such as circuits.
  • the embodiment of the present application also provides a computer-readable storage medium, wherein one or more instructions are stored in the computer-readable storage medium, and the one or more instructions are suitable for being loaded by a processor to execute the method provided by the above method embodiment.
  • 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 embodiment of the present application further provides a communication system, and the system may include the terminal device and the network device in the embodiments corresponding to FIG. 3 to FIG. 5 .
  • each module/unit contained in the product may be a software module/unit, or a hardware module/unit, or may be partly a software module/unit and partly a hardware module/unit.
  • each module/unit contained therein may be realized by hardware such as a circuit, or at least some modules/units may be realized by a software program, and the software program Running on the integrated processor inside the chip, the remaining (if any) modules/units can be realized by means of hardware such as circuits; They are all realized by means of hardware such as circuits, and different modules/units can be located in the same component (such as chips, circuit modules, etc.) or different components of the chip module, or at least some modules/units can be realized by means of software programs, The software program runs on the processor integrated in the chip module, and the remaining (if any) modules/units can be realized by hardware such as circuits; /Units can be realized by means of hardware such as circuits
  • the modules in the device of the embodiment of the present application can be combined, divided and deleted according to actual needs.

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Abstract

本申请公开了一种通信方法及其装置，应用于通信技术领域。该方法包括：终端设备在至少两个随机接入时机RO上分别发送随机接入请求；并在与第一同步信号块SSB关联的波束上接收随机接入响应，该第一SSB为与所述至少两个RO关联的SSB中的一个SSB。通过这种方式，终端设备可以确定在与第一SSB关联的波束上接收随机接入响应，有利于提高随机接入的成功率。

Description

一种通信方法及其装置 技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及其装置。
背景技术
终端设备通过物理随机接入信道(Physical Random Access Channel，PRACH)发起随机接入请求。如果在随机接入响应(Random Access Response，RAR)时间窗结束前未收到来自网络设备的RAR、或者因随机接入请求发送功率太小、或者其他原因导致该随机接入请求未被网络设备成功检测到，那么就认为此次随机接入失败，终端设备需要再次发送随机接入请求进行随机接入，影响终端设备的性能。
如果在RAR时间窗结束前，终端设备通过不同的波束发送至少两次随机接入请求，可以提升网络设备成功接收随机接入请求的概率。但是，在终端设备发送至少两次随机接入请求的情况下，终端设备无法判断网络设备通过哪个波束发送随机接入响应，也就无法确定通过哪个波束接收随机接入响应，这样终端设备可能无法接收到随机接入响应，导致随机接入失败。
发明内容
本申请公开了一种通信方法及其装置，终端设备可以确定在与第一SSB关联的波束上接收随机接入响应，这样有利于提高随机接入的成功率。
第一方面，本申请实施例提供了一种通信方法，所述方法包括：终端设备在至少两个RO上分别向网络设备发送随机接入请求；并在与第一SSB关联的波束上接收来自该网络设备的随机接入响应，第一SSB为与上述至少两个RO关联的SSB中的一个SSB。
在一种可选的实施方式中，第一SSB与上述至少两个RO中的第i个RO关联，i为大于或等于1的正整数。
在一种可选的实施方式中，该方法还可以包括：终端设备接收来自网络设备的第一指示信息，第一指示信息用于指示i。
在一种可选的实施方式中，该方法还可以包括：终端设备向网络设备发送第二指示信息，该第二指示信息用于指示i。
在一种可选的实施方式中，终端设备在与第一SSB关联的波束上接收来自网络设备的随机接入响应，具体的实施方式为：终端设备根据第一RA-RNTI，在与第一SSB关联的波束上接收来自网络设备的随机接入响应，其中，第一RA-RNTI是根据第i个RO的时频资源位置确定的。
在一种可选的实施方式中，第一SSB的信号强度在与上述至少两个RO关联的SSB中最大。
在一种可选的实施方式中，该方法还可以包括：终端设备接收来自网络设备的第三指示信息，该第三指示信息用于指示第一SSB。
在一种可选的实施方式中，终端设备接收来自网络设备的第三指示信息，具体的实施方式为：终端设备接收来自网络设备的DCI，该DCI包括第三指示信息。
在一种可选的实施方式中，第三指示信息占用n或个比特；其中，n为与上述述至少两个RO关联的SSB的总个数，或者，n为终端设备的服务小区内SSB的总个数，或者，n为终端设备的服务小区实际使用的SSB的总个数。
在一种可选的实施方式中，终端设备在与第一SSB关联的波束上接收来自网络设备的随机接入响应，具体的实施方式为：终端设备根据第一RA-RNTI，在与第一SSB关联的波束上接收来自网络设备的随机接入响应；其中，第一RA-RNTI是根据上述至少两个RO的时频资源位置确定的，或者，第一RA-RNTI是根据上述至少两个RO中一个RO的时频资源位置确定的。
第二方面，本申请实施例提供了另一种通信方法，所述方法包括：网络设备在至少两个RO上分别接收来自终端设备的随机接入请求；并在与第一SSB关联的波束上向该终端设备发送随机接入响应，第一SSB为与上述至少两个RO关联的SSB中的一个SSB。
在一种可选的实施方式中，第一SSB与上述至少两个RO中的第i个RO关联，i为大于或等于1的正整数。
在一种可选的实施方式中，该方法还可以包括：网络设备向终端设备发送第一指示信息，该第一指示信息用于指示i。
在一种可选的实施方式中，该方法还可以包括：网络设备接收来自该终端设备的第二指示信息，该第二指示信息用于指示i。
在一种可选的实施方式中，网络设备在与第一SSB关联的波束上向终端设备发送随机接入响应，具体的实施方式为：网络设备根据第一RA-RNTI，在与第一SSB关联的波束上向终端设备发送随机接入响应，其中，第一RA-RNTI是根据第i个RO的时频资源位置确定的。
在一种可选的实施方式中，第一SSB的信号强度在与上述至少两个RO关联的SSB中最大。
在一种可选的实施方式中，该方法还可以包括：网络设备向终端设备发送第三指示信息，该第三指示信息用于指示第一SSB。
在一种可选的实施方式中，网络设备向终端设备发送第三指示信息，具体的实施方式为：网络设备向终端设备发送DCI，该DCI包括第三指示信息。
在一种可选的实施方式中，第三指示信息占用n或个比特；其中，n为与上述至少两个RO关联的SSB的总个数，或者，n为终端设备的服务小区内SSB的总个数，或者，n为终端设备的服务小区实际使用的SSB的总个数。
在一种可选的实施方式中，网络设备在与第一SSB关联的波束上向终端设备发送随机接入响应，具体的实施方式为：网络设备根据第一RA-RNTI，在与第一SSB关联的波束上向终端设备发送随机接入响应；其中，第一RA-RNTI是根据上述至少两个RO的时频资源位置确定的，或者，第一RA-RNTI是根据上述至少两个RO中一个RO的时频资源位置确定的。
第三方面，本申请实施例提供了一种通信装置，所述装置包括用于实现第一方面或第 二方面所述的方法的单元。
第四方面，本申请实施例提供另一种通信装置，包括处理器；该处理器，用于执行第一方面或第二方面所述的方法。
在一种可选的实施方式中，该通信装置还可以包括存储器；该存储器用于存储计算机程序；处理器，具体用于从该存储器中调用计算机程序，执行第一方面或第二方面所述的方法。
第五方面，本申请实施例提供一种芯片，该芯片用于执行第一方面或第二方面所述的方法。
第六方面，本申请实施例提供一种芯片模组，该芯片模组包括通信接口和芯片，其中：通信接口用于进行芯片模组内部通信，或者用于该芯片模组与外部设备进行通信；该芯片用于执行第一方面或第二方面所述的方法。
第七方面，本申请实施例提供一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，所述计算机程序包括程序指令，所述程序指令当被处理器执行时使所述处理器执行如第一方面或第二方面所述的方法。
第八方面，本申请实施例提供一种包括计算机程序或指令的计算机程序产品，当计算机程序或指令在计算机上运行时，使得计算机执行如第一方面或第二方面所述的方法。
通过本申请实施例，终端设备在至少两个RO上分别发送随机接入请求的情况下，网络设备可以通过与第一SSB关联的波束发送随机接入响应，终端设备可以在与第一SSB关联的波束上接收随机接入响应，而第一SSB为与至少两个RO关联的SSB中的一个SSB，从而有助于提高终端设备接收到随机接入响应的可能性，进一步有利于提高随机接入成功的概率。
附图说明
图1是本申请实施例提供的一种通信***的架构示意图；
图2是本申请实施例提供的一种四步随机接入的流程示意图；
图3是本申请实施例提供的一种通信方法的流程示意图；
图4是本申请实施例提供的另一种通信方法的流程示意图；
图5是本申请实施例提供的又一种通信方法的流程示意图；
图6是本申请实施例提供的一种通信装置的结构示意图；
图7是本申请实施例提供的另一种通信装置的结构示意图；
图8是本申请实施例提供的一种芯片模组的结构示意图。
具体实施方式
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。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。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。
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。
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。
请参见图1，图1为本申请实施例提供的一种通信***的架构示意图。该通信***可包括但不限于一个终端设备和一个网络设备，图1所示的设备数量和形态用于举例并不构成对本申请实施例的限定，实际应用中可以包括两个或两个以上的网络设备，两个或两个以上的终端设备。图1所示的通信***以包括一个终端设备101和一个网络设备102为例。
其中，本申请实施例中终端设备是一种具有无线收发功能的设备，可以称之为终端(terminal)、用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)、接入终端设备、车载终端设备、工业控制终端设备、UE单元、UE站、移动站、远方站、远程终端设备、移动设备、UE终端设备、无线通信设备、UE代理或UE装置等。终端设备可以是固定的或者移动的。需要说明的是，终端设备可以支持至少一种无线通信技术，例如长期演进(long time evolution，LTE)、新空口(new radio，NR)、宽带码分多址(wideband code division multiple access，WCDMA)等。例如，终端设备可以是手机(mobile phone)、平板电脑(pad)、台式机、笔记本电脑、一体机、车载终端、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、无人驾驶(self-driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、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、可穿戴设备、未来移动通信网络中的终端设备或者未来演进的公共移动陆地网络(public land mobile network，PLMN)中的终端设备等。在本申请的一些实施例中，终端设备还可以是具有收发功能的装置，例如芯片模组。其中，芯片模组可以包括芯片，还可以包括其它分立器件。本申请的实施例对终端设备所采用的具体技术和具体设备形态不做限定。
本申请实施例中网络设备是一种为终端设备提供无线通信功能的设备，网络设备可以为接入网(access network，AN)设备，AN设备可以为无线接入网(radio access network，RAN)设备。其中，接入网设备可以支持至少一种无线通信技术，例如LTE、NR、WCDMA等。示例的，接入网设备包括但不限于：第五代移动通信***(5th-generation，5G)中的下一代基站(generation node B，gNB)、演进型节点B(evolved node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(node B，NB)、基站控制器(base station  controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved node B、或home node B，HNB)、基带单元(baseband unit，BBU)、TRP、发射点(transmitting point，TP)、移动交换中心等。网络设备还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器、集中单元(centralized unit，CU)和/或分布单元(distributed unit，DU)，或者接入网设备可以为中继站、接入点、车载设备、终端设备、可穿戴设备以及未来移动通信中的接入网设备或者未来演进的PLMN中的接入网设备等。在一些实施例中，网络设备还可以为具有为终端设备提供无线通信功能的装置，例如芯片模组。示例的，芯片模组可以包括芯片，还可以包括其它分立器件。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。
需要说明的是，本申请实施例的技术方案可以应用于各种通信***。例如：LTE通信***、第4代(4th generation，4G)移动通信***、5G移动通信***、5G NR***。可选的，本申请实施例的方法还适用于未来的各种通信***，例如6G***或者其他通信网络等。
可以理解的是，本申请实施例描述的通信***是为了更加清楚的说明本申请实施例的技术方案，并不构成对本申请实施例提供的技术方案的限定，本领域技术人员可知，随着***架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
首先，对本申请实施例涉及的技术术语进行介绍，以便于本领域技术人员理解。
(1)随机接入过程
随机接入过程可以使得终端设备接入网络，建立与网络之间的连接。其中，依据随机接入过程的通信次数，可以将随机接入过程可以分为四步随机接入过程和两步随机接入过程。具体的，四步随机接入过程可以包括Msg1、Msg2、Msg3以及Msg4四个消息。如图2所示，为四步随机接入过程的流程示意图。
首先，终端设备通过物理随机接入信道(Physical Random Access Channel，PRACH)向网络设备发送随机接入请求。其中，随机接入请求又可以称之为消息1(Msg1)。具体地，随机接入请求可以包括随机接入前导码(random access preamble，RA preamble)。其中，RA preamble用于请求接入网络，即RA preamble的主要作用是告知网络设备有一个随机接入请求，并使得网络设备能估计与终端设备之间的传输时延，具体可以参见下述介绍，在此不再赘述。
其次，网络设备接收到随机接入请求，向终端设备发送随机接入响应(Random Access Response，RAR)。其中，RAR又可以称之为消息2(Msg2)。
在一些实施例中，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。示例的，在本申请实施例中，RAR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。
对于终端设备来说，终端设备发送RA preamble之后，在RAR时间窗(window)内监 听由RA-RNTI加扰的PDCCH(Physical Downlink Control Channel，物理下行控制信道)，以接收对应RA-RNTI的RAR。若在RAR时间窗内没有接收到RAR，则认为此次随机接入过程失败。若终端设备成功地使用RA-RNTI解析PDCCH获取到下行控制信息(Downlink Control Information，DCI)，接着终端设备根据DCI尝试使用RA-RNTI解析PDSCH payload。每个随机接入请求对应一个RA preamble ID(或RA preamble index)，若终端设备成功的解出了PDSCH payload，会检查其中随机接入前导序列号(Random access preamble identity，RAPID)是否与发送Msg1时使用的RA preamble ID相同。若相同，那么Msg2解调成功，此时终端设备可以停止监听RAR。
然后，终端设备接收到RAR，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。该标志可以用于冲突解决。例如，对于处于RRC_CONNECTED(Radio Resource Control_CONNECTED，无线资源控制连接)态的终端设备来说，终端设备唯一的标志是C-RNTI(Cell Radio Network Temporary Identifier，无线网络临时标识)；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(SAE Temporary Mobile Subscriber Identifier，s临时移动用户身份)或一个随机数)。
最后，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。
具体的，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(Temporary Cell Radio Network Temporary Identifier，临时小区无线网络临时标识)加扰，则当成功解码出的MAC(Medium Access Control，媒体接入控制)PDU(Protocol Data Unit，协议数据单元)中包含的UE CRID(Contention Resolution Identity，竞争解决标识)MAC CE(control element，控制元素)与Msg3发送的CCCH(Common Control Channel，公共控制信道)SDU(service Data Unit，服务数据单元)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。
需要说明的是，随机接入过程中，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，用于后续的数据传输。
(2)随机接入前导码(RA preamble)
RA preamble用于请求接入网络，告知网络设备有一个随机接入请求。RA preamble可用于随机接入时网络设备区分发起随机接入的终端设备，也可以用作其它用途，本申请实施例中不做限定。
示例的，一个小区有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 occasion，RO)进行传输，即RA preamble由PRACH occasion承载(或传输)。
(3)随机接入无线网络临时标识(Random Access Radio Network Temporary Identifier，RA-RNTI)
示例的，在本申请实施例中，终端设备发送Msg1时会计算RA-RNTI并保存。网络设备收到该Msg1后，同样会计算RA-RNTI，RAR是通过RA-RNTI加扰得到的。因此只有在RA-RNTI标识的时频资源位置上发送Msg1的终端设备才能成功解出该RAR。示例性的，RA-RNTI可根据RO的时频资源位置确定，具体见公式(1)：
RA-RNTI＝1+s_id+14*t_id+14*80*f_id+14*80*8*ul_carrier_id        (1)
其中，s_id表示RO的第1个正交频分复用(orthogonal frequency division multiplexing，OFDM)符号的索引，取值为0≤s_id<14；t_id表示RO的第1个slot(在一个***帧中)的索引，取值为0≤t_id<80；f_id表示RO在频域上的索引，取值为0≤f_id<8；ul_carrier_id表示用于传输RA preamble的上行载波，取值0表示常规上行链路(normal uplink，NUL)载波，取值1表示辅助上行链路(supplementary uplink，SUL)载波。
(4)加扰
加扰，是数字信号的加工处理方法，用扰码与原始信号异或运算，从而得到新的信号。通常上行链路物理信道加扰的作用是区分不同的终端设备，下行链路加扰可以区分小区和信道。其中，扰码可用于对原始信号加扰和解扰。例如，扰码可以对下行控制信息(downlink control information，DCI)加扰，或者也可称为对PDCCH加扰。对DCI加扰具体是指对DCI的循环冗余校验(cyclic redundancy check，CRC)字段进行加扰。相应地，终端设备对接收到的DCI进行解扰，具体是指终端设备对DCI的CRC字段使用相应类型的扰码进行解扰，以确定DCI的格式或者类型等。示例的，在本申请实施例中，扰码可以包括随机接入无线网络临时标识(random access radio network temporary identifier，RA-RNTI)。
请参见图3，为本申请实施例提供的一种通信方法的流程示意图。如图3所示，该通信方法可以包括但不限于如下步骤：
S301、终端设备在至少两个RO上分别向网络设备发送随机接入请求。相应的，网络设备在该至少两个RO上分别接收来自终端设备的随机接入请求。
终端设备在一个RO上可以发送一个随机接入请求。终端设备在至少两个RO上分别发送随机接入请求表示：终端设备在至少两个RO中的每个RO上分别发送一个随机接入请求。例如，以至少两个RO分别为RO1和RO2为例，终端设备在RO1和RO2上分别向网络设备发送随机接入请求，可以理解为：终端设备在RO1上向网络设备发送随机接入请求，以及在RO2上向网络设备发送随机接入请求。其中，在RO1上发送的随机接入请求和在RO2上发送的随机接入请求可以是相互独立的。
示例的，对于四步随机接入过程来说，S301中的随机接入请求又可以称之为Msg1，该随机接入请求包括RA preamble。
在本申请的一些实施例中，终端设备在触发随机接入过程后，可以执行如下步骤：(1)选择SSB。(2)根据SSB和RO的关联关系，选择与步骤(1)所选择的SSB关联的RO，进而从所选择的RO上可用的RA preamble中选择一个RA preamble，Msg1中包含该RA preamble或该RA preamble的ID或index。可选的，每个RO上可用的RA preamble数为64。需要说明的是，终端设备在至少两个RO上分别发送的随机接入请求中的RA preamble相同。(3)选择用于承载RA preamble的PRACH资源。(4)计算RA-RNTI，终端设备在发送Msg1后，根据该RA-RNTI接收随机接入响应。
应理解，上述至少两个RO可以关联同一SSB，或者关联不同SSB。在本申请实施例中，每个波束可以关联至少一个SSB，且不同的SSB各自所关联的波束可能是相同的或不同的。例如，不同SSB关联的波束的方向是不同的，或者，不同SSB关联的波束的方向是相同的。与上述至少两个RO关联的SSB所关联的波束可能相同，也可能不同。例如，以至少两个RO分别为RO1、RO2和RO3为例。在这种情况下，终端设备在RO1、RO2、RO3上分别发送随机接入请求，RO1与SSB1关联，RO2与SSB2关联，RO3与SSB2关联，其中，SSB1关联波束1，SSB2关联波束2。或者，SSB1和SSB2均与波束1关联。需要说明的是，RO1、RO2和RO3关联的SSB也可以均不相同。
在本申请实施例中，SSB与RO的映射关系(或称为关联关系、对应关系)可以通过高层参数SSB-per-rach-occasion(N)指示，示例的，N的取值可以是{1/8,1/4,1/2,1,2,4,8,16}。如果N<1，代表1个SSB可以映射到1/N个RO中，例如，若N＝1/8，则一个SSB映射到8个RO；如果N＝1，代表1个SSB映射到1个RO中；如果N>1，代表1个RO内可以映射N个SSB。频域上可配置的RO的数目由高层参数msg1-FDM配置，示例的，频域上RO的数目可以为{1，2，4，8}。
每个RO上可用的RA preamble数为64，其中，每个SSB可用的RA preamble个数由高层参数CB-PreamblesPerSSB(R)指示。例如，在N>1的情况下，N个SSB关联一个RO，SSB n可以从R个RA 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RA preamble的index从起始。
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。
S302、网络设备在与第一SSB关联的波束上向该终端设备发送随机接入响应，该第一SSB为与至少两个RO关联的SSB中的一个SSB。相应的，终端设备在与第一SSB关联的波束上接收该随机接入响应。
本申请实施例中，终端设备在至少两个RO上分别发送随机接入请求的情况下，网络设备可以通过与第一SSB关联的波束发送随机接入响应，终端设备可以通过与第一SSB关联的波束接收随机接入响应，而第一SSB为与至少两个RO关联的SSB中的一个SSB，从而有助于提高终端设备接收到随机接入响应的可能性，进一步提高随机接入成功的概率。
在一些实施例中，终端设备与网络设备之间可以通过下述方式预先约定第一SSB：
方式1：第一SSB为与上述至少两个RO中的第i个RO关联的SSB，i为大于或等于1的正整数。关于方式1的具体描述，可参见图4对应实施例。
方式2：网络设备向终端设备发送第三指示信息以指示第一SSB。关于方式2的具体描述，可参见图5对应实施例。
在一种实现方式中，网络设备根据第一RA-RNTI，在与第一SSB关联的波束上向终端设备发送随机接入响应。相应的，终端设备根据第一RA-RNTI，在与第一SSB关联的波束上接收随机接入响应。
示例性的，网络设备根据第一RA-RNTI，在与第一SSB关联的波束上向终端设备发送随机接入响应，包括：网络设备使用第一RA-RNTI对RAR进行加扰后，在与第一SSB关联的波束上向终端设备发送PDCCH，该PDCCH由第一RA-RNTI加扰；然后在与第一SSB关联的波束上向终端设备发送PDSCH，RAR承载于该PDSCH payload中，该PDCCH用于调度该PDSCH。其中，用于计算该第一RA-RNTI的RO关联该第一SSB。相应的，终端设备根据第一RA-RNTI，在与第一SSB关联的波束上接收随机接入响应，包括：在RAR时间窗内，终端设备在与第一SSB关联的波束上监听由第一RA-RNTI加扰的PDCCH，如果监听到由第一RA-RNTI加扰的PDCCH，则根据监听到的PDCCH在与第一SSB关联的波束上接收PDSCH，并使用第一RA-RNTI解调PDSCH payload，以得到RAR。
其中，第一RA-RNTI是根据上述至少两个RO的时频资源位置确定的。例如，以上述至少两个RO分别为RO1、RO2和RO3为例。第一RA-RNTI可以是根据RO1、RO2和RO3的时频资源位置确定的。示例性的，以时频资源位置包括RO的第1个OFDM符号的索引、RO的第1个slot的索引、RO在频域上的索引为例，其具体过程为：将RO1的第1个OFDM符号的索引、RO1的第1个slot的索引、RO1在频域上的索引、用于传输RA preamble的上行载波代入公式(1)，得到RO1对应的RA-RNTI；并将RO2的第1个OFDM符号的索引、RO2的第1个slot的索引、RO2在频域上的索引、用于传输RA preamble的上行载波代入公式(1)，得到RO2对应的RA-RNTI；将RO3的第1个OFDM符号的索引、RO3的第1个slot的索引、RO3在频域上的索引、用于传输RA preamble的上行载波代入公式(1)，得到RO3对应的RA-RNTI；然后，根据RO1对应的RA-RNTI、RO2对应的RA-RNTI、RO3对应的RA-RNTI确定第一RA-RNTI(例如取平均值)。
上述RO1、RO2、RO3各自对应的RA-RNTI分别由各自RO的时频资源位置确定，在其他实现方式中，上述至少两个RO中的某个RO对应的RA-RNTI可以由其他RO的时频资源位置确定。例如，以上述至少两个RO分别为RO1、RO2和RO3为例，其中，RO1对应的RA-RNTI可以由RO1的时频资源位置确定，RO2、RO3各自对应的RA-RNTI均可以由RO3的时频资源位置确定。
可选的，第一RA-RNTI还可以是根据上述至少两个RO中的两个或多个RO的时频资源位置确定的。例如，以上述至少两个RO分别为RO1、RO2和RO3为例。第一RA-RNTI可以是根据前两个RO(即RO1和RO2)的时频资源位置确定的。示例性的，其具体过程为：将RO1、RO2的时频资源位置分别代入公式(1)，分别得到RO1、RO2对应的RA-RNTI(方法与前一例子中确定RO对应的RA-RNTI相同，此处不再赘述)；然后根据RO1对应的RA-RNTI、RO2对应的RA-RNTI确定第一RA-RNTI(例如取平均值)。
可选的，第一RA-RNTI可以是根据上述至少两个RO中一个RO的时频资源位置确定的，示例性，第一RA-RNTI是根据上述至少两个RO中第一个RO的时频资源位置确定的。 例如，以上述至少两个RO分别为RO1、RO2和RO3为例。第一RA-RNTI可以是根据第一个RO(即RO1)的时频资源位置确定的。示例性的，以时频资源位置包括RO的第1个OFDM符号的索引、RO的第1个slot的索引、RO在频域上的索引为例，将RO1的第1个OFDM符号的索引、RO1的第1个slot的索引、RO1在频域上的索引、用于传输RA preamble的上行载波代入公式(1)，得到RO1对应的RA-RNTI，第一RA-RNTI为RO1对应的RA-RNTI。
或者，第一RA-RNTI是根据上述至少两个RO中第二个RO的时频资源位置确定的，或者，第一RA-RNTI是根据上述至少两个RO中最后一个RO的时频资源位置确定的。
在一种实现方式中，终端设备在至少两个RO上分别发送随机接入请求后，可以根据该至少两个RO中的每个RO的时频资源位置，分别确定该RO对应的RA-RNTI的值；终端设备根据该RO对应的RA-RNTI的值，在RAR时间窗中监听PDCCH以获取DCI，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。例如，终端设备在至少两个RO上分别发送随机接入请求后，在RAR时间窗中，可以波束扫描(beam sweeping)的方式在每个时隙(slot)中分别监听不同beam下的PDCCH。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，但是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，可以增加小区的覆盖范围。
示例性的，以至少两个RO分别为RO1和RO2为例，其中，RO1关联SSB0，RO2关联SSB1；SSB0关联波束1，SSB1关联波束2。终端设备分别在RO1和RO1上发送随机接入请求后，在RAR时间窗中，终端设备轮流在波束1上监听由RO1对应的RA-RNTI加扰的PDCCH、在波束2上监听由RO2对应的RA-RNTI加扰的PDCCH。
在另一种实现方式中，终端设备在至少两个RO上分别发送随机接入请求后，可以根据该至少两个RO中一个RO的时频资源位置，确定第一RA-RNTI的值；终端设备在RAR时间窗内，均根据该第一RA-RNTI的值监听PDCCH以获取DCI；然后，根据获取的DCI接收并解析PDSCH payload，以得到RAR消息。
示例性的，以至少两个RO分别为RO1和RO2，终端设备根据至少两个RO中第一个RO的时频资源位置确定第一RA-RNTI的值为例，终端设备在RO1、RO2上分别发送随机接入请求后，终端设备可以根据RO1的时频资源位置确定第一RA-RNTI的值；然后，在RAR时间窗中，监听由第一RA-RNTI的值加扰的PDCCH。
通过上述两种方式，均可以确保终端设备和网络设备确定出的RA-RNTI的值一致，网络设备通过确定出的RA-RNTI的值对随机接入响应进行加扰，终端设备通过确定出的RA-RNTI的值对随机接入响应进行解扰。因此终端设备和网络设备确定出的RA-RNTI的值一致，有利于确保终端设备成功解调DCI和随机接入响应。
通过本申请实施例，终端设备在至少两个RO上分别发送随机接入请求的情况下，网络设备可以通过与第一SSB关联的波束发送随机接入响应，终端设备可以在与第一SSB关联的波束上接收随机接入响应，而第一SSB为与至少两个RO关联的SSB中的一个SSB，从而有助于提高终端设备接收到随机接入响应的可能性，进一步有利于提高随机接入成功的概率。另一方面，终端设备和网络设备确定出的RA-RNTI的值一致，有利于确保终端设 备成功解调DCI和随机接入响应。
请参见图4，为本申请实施例提供的另一种通信方法的流程示意图，图4对应实施例主要描述了第一SSB为与前述至少两个RO中的第i个RO关联的SSB。如图4所示，该通信方法可以包括但不限于如下步骤：
S401、终端设备在至少两个RO上分别发送随机接入请求。相应的，网络设备在至少两个RO上分别接收来自终端设备的随机接入请求。
需要说明的是，步骤S401的执行过程可参见图3中步骤S301的具体描述，此处不再赘述。
S402、网络设备在与第一SSB关联的波束上向该终端设备发送随机接入响应，该第一SSB与前述至少两个RO中的第i个RO关联，i为大于或等于1的正整数。相应的，终端设备在与第一SSB关联的波束上接收该随机接入响应。
其中，i可以通过协议预设，或者，i可以由网络设备确定并由网络设备指示终端设备该i的取值，示例性的，网络设备向终端设备发送第一指示信息，该第一指示信息用于指示i。相应的，终端设备接收该第一指示信息。可选的，该第一指示信息可以为***信息。
或者，i可以由终端设备确定并由终端设备指示网络设备该i的取值。示例性的，所述终端设备发送第二指示信息，该第二指示信息用于指示i。相应的，网络设备接收来自终端设备的第二指示信息。例如，终端设备将至少两个RO中的第i个RO与第一SSB关联，然后终端设备向网络设备发送第二指示信息。
可选的，第二指示信息可以显式指示i的取值，例如，第二指示信息携带i的取值。或者，第二指示信息可以隐式指示i的取值，例如，在终端设备处于非RRC_CONNECTED态的情况下，终端设备可以通过向网络设备发送RA preamble以隐式指示i的取值。例如，以RA preamble的索引指示i的取值为例，若可用的RA preamble的数量为64，RA preamble的索引的取值范围为[0,1,2,3……61,62,63]，若终端设备发送的RA preamble的索引为3，那么i的取值可以为3。此时，该第二指示信息可以携带于四步随机接入过程中的Msg1，或者，携带于两步随机接入过程中的消息A(又称为MsgA)。可以理解的是，在终端设备处于RRC_CONNECTED态的情况下，该第二指示信息可以携带于***信息中。
在一种实现方式中，第一SSB可以根据前述至少两个RO关联的SSB的信号强度确定。可选的，第一SSB的信号强度在与前述至少两个RO关联的SSB中最大。示例性的，终端设备可以测量SSB的参考信号接收功率(Reference Signal Receiving Power，RSRP)，将RSRP值最大的SSB确定为第一SSB。或者，第一SSB的信号强度在与前述至少两个RO关联的SSB排在前a位。或者，第一SSB的信号强度大于预设信号强度阈值。以前述至少两个RO为b个RO为例，b为大于或等于2的正整数，a可以为大于或等于1且小于b的正整数。
在另一种实现方式中，第一SSB可以为终端设备选择用于接收随机接入响应(即Msg2)的波束所关联的SSB。可选的，在确定SSB与RO间的关联关系时，终端设备可以将选择用于接收随机接入响应(即Msg2)的波束所关联的SSB关联于第i个RO上，即建立第一SSB与第i个RO之间的关联关系。
在一种实现方式中，终端设备在与第一SSB关联的波束上接收随机接入响应，包括： 终端设备根据第一RA-RNTI，在与第一SSB关联的波束上接收随机接入响应，其中，第一RA-RNTI是根据第i个RO的时频资源位置确定的。相应的，网络设备在与第一SSB关联的波束上向终端设备发送随机接入响应，包括：网络设备根据该第一RA-RNTI，在与第一SSB关联的波束上向终端设备发送随机接入响应。
示例性的，以上述至少两个RO分别为RO1和RO2，且i＝1为例，终端设备在RO1、RO2上分别发送随机接入请求后，终端设备可以根据第1个RO(即RO1)的时频资源位置确定第一RA-RNTI的值；然后在RAR时间窗中监听由第一RA-RNTI的值加扰的PDCCH以获取DCI，并根据DCI使用第一RA-RNTI的值解析PDSCH payload，以接收由第一RA-RNTI的值加扰得到的RAR消息。
在本申请实施例中，约定i的取值，网络设备在与前述至少两个RO中的第i个RO关联的SSB(第一SSB)所关联的波束上发送随机接入响应，相应的，终端设备可以在第一SSB关联的波束上接收PDSCH，进而解调PDSCH payload以得到随机接入响应，从而有助于提高终端设备接收到随机接入响应的可能性，进一步有利于提高随机接入成功的概率。
请参见图5，为本申请实施例提供的又一种通信方法的流程示意图，图5对应实施例主要描述了如何通过第三指示信息指示第一SSB。如图5所示，该通信方法可以包括但不限于如下步骤：
S501、终端设备在至少两个RO上分别发送随机接入请求。相应的，网络设备在至少两个RO上分别接收来自终端设备的随机接入请求。
需要说明的是，步骤S501的执行过程可参见图3中步骤S301的具体描述，此处不再赘述。
S502、网络设备向终端设备发送第三指示信息，该第三指示信息用于指示第一SSB，该第一SSB为与前述至少两个RO关联的SSB中的一个SSB。相应的，终端设备接收该第三指示信息。
其中，第一SSB为与终端设备接收随机接入响应所使用的波束相关联的SSB。
在一种实现方式中，第三指示信息是网络设备通过DCI指示给终端设备的。具体的，网络设备发送DCI，相应的，终端设备接收DCI，该DCI包括第三指示信息。
在本申请实施例中，终端设备在至少两个RO上分别发送Msg1(包括随机接入请求)，随后网络设备可以波束扫描的方式发送PDCCH DCI，该DCI指示网络设备通过哪个波束发送Msg2。终端设备在任意波束上解出DCI之后，不必进行波束扫描，而可以直接在DCI指示的第一SSB关联的波束上接收PDSCH，进而解调PDSCH payload以得到随机接入响应。可以理解的是，终端设备解出DCI后，获知网络设备在第一SSB关联的波束上发送随机接入响应，因此终端设备可以直接在第一SSB关联的波束上监听PDSCH，而不用通过波束扫描的方式监听PDSCH。波束扫描过程中需要频繁更换波束，终端设备直接在第一SSB关联的波束上监听PDSCH，有利于减少监听时间以及减少终端设备的功耗。
示例性的，以上述至少两个RO分别为RO1、RO2、RO3，并且RO1关联SSB0，RO2关联SSB1，RO3关联SSB2；SSB0关联波束1，SSB1关联波束2，SSB2关联波束3为例。终端设备在RO1、RO2、RO3上分别发送随机接入请求，网络设备接收到随机接入请求后， 轮流在波束1、波束2、波束3上发送PDCCH DCI，然后在波束3上发送PDSCH，其中，该DCI指示网络设备通过SSB2关联的波束(即波束3)发送随机接入响应。终端设备发送随机接入请求后，轮流在波束1、波束2、波束3上监听PDCCH；若终端设备在波束3上监听到PDCCH，接着终端设备解出DCI，并获知网络设备通过SSB2关联的波束(即波束3)发送随机接入响应；然后，终端设备可以不用切换波束，直接在波束3上监听PDSCH，进而解调PDSCH payload以得到随机接入响应。
在一种实现方式中，第三指示信息可以占用n或个比特；其中，为向上取整函数，n为与前述至少两个RO关联的SSB的总个数，或者，n为终端设备的服务小区内SSB的总个数，或者，n为终端设备的服务小区实际使用的SSB的总个数。
其中，在本申请实施例中，终端设备的服务小区可以理解为与上述至少两个RO关联的SSB所在的小区。
终端设备的服务小区实际使用的SSB是指：网络设备指示给终端设备的SSB的总个数，即网络设备实际向终端设备发送的SSB的总个数。示例性的，小区a内SSB的总个数为8个，但是实际发送的SSB低于8个，比如在某些覆盖范围上无用户连接小区，那么该小区可以不必发送所有SSB。假设某低频小区中有6个SSB发送，那么使用6bit信息指示网络设备在哪个SSB关联的波束上发送随机接入响应，可以节省第三指示信息所占用的比特数。可选的，前述至少两个(如m个)RO关联的SSB可以为终端设备的服务小区内信号强度排在前m位的SSB。示例性的，假设某低频小区中有6个SSB发送，终端设备可以在这6个SSB中选择4个信号强度比较好的SSB关联的波束发送Msg1。
可选的，可以在DCI的保留比特(reserve bit)中扩展一个比特域以用于指示网络设备在哪个SSB关联的波束上发送随机接入响应，即第三指示信息占用的n或个比特可以为DCI中的保留比特。
在一种实现方式中，第三指示信息占用n个比特的情况下，该n个比特对应的n个比特位中的每个比特位均对应有一个SSB，第一SSB可以为该n个比特位中取值为第一预设值的比特位所对应的SSB。取值为第一预设值的比特位所对应的SSB，可以表示网络设备使用该SSB关联的波束发送Msg2(即发送随机接入响应)；取值为第二预设值的比特位所对应的SSB，可以表示网络设备未使用该SSB关联的波束发送Msg2(即发送随机接入响应)。
示例性的，若n＝4，第一预设值为1，且若该第三指示信息占用的4个比特的取值为1000，那么第一SSB为该第三指示信息占用的4个比特位中的第一个比特位对应的SSB。若该第三指示信息占用的4个比特的取值为0100，那么第一SSB为该第三指示信息占用的4个比特位中的第二个比特位对应的SSB。
可选的，第三指示信息占用的n(或)个比特位各自对应的SSB，按照SSB index升序排列。换言之，若n＝4，则4个比特位中第一个比特位对应的SSB的index<第二个比特位对应的SSB的index<第三个比特位对应的SSB的index<第四个比特位对应的SSB的index。可选的，第三指示信息占用的n(或)个比特位各自对应的SSB的index可以连续，也可以不连续。例如，若n＝4，则4个比特位对应的SSB的index可以为0,1,2,3，或者，为0,2,4,6。
示例性的，以第三指示信息占用4个比特(即n＝4)，且n表示与前述至少两个RO关联的SSB的总个数，与前述至少两个RO关联的SSB按照SSB index升序排列为：SSB0、SSB1、SSB2、SSB3为例，那么表示4个比特位中第一个比特位、第二个比特位、第三个比特位、第四个比特位对应的SSB分别为：SSB0、SSB1、SSB2、SSB3。若该第三指示信息占用的4个比特的取值为1000，那么第一SSB为SSB0。若该第三指示信息占用的4个比特的取值为0100，那么第一SSB为SSB1。
在一种实现方式中，第三指示信息占用个比特的情况下，第一SSB为该个比特对应的个比特位的取值对应的SSB。需要说明的是，个比特位的每种取值均可以对应有一个SSB，或者，个比特位的部分取值对应有一个SSB。
示例性的，以第三指示信息占用2个比特(即n＝4)，且n表示与前述至少两个RO关联的SSB的总个数，与前述至少两个RO关联的SSB按照SSB index升序排列为：SSB0、SSB1、SSB2、SSB3为例，那么表示2个比特位的取值00、01、10、11对应的SSB分别为：SSB0、SSB1、SSB2、SSB3。若该第三指示信息占用的2个比特的取值为00，那么第一SSB为SSB0。若该第三指示信息占用的2个比特的取值为11，那么第一SSB为SSB3。
示例性的，第三指示信息占用3个比特(即n＝6)，n表示终端设备的服务小区实际使用的SSB的总个数，终端设备的服务小区实际使用的SSB按照SSB index升序排列为：SSB0、SSB3、SSB4、SSB5、SSB6、SSB7为例，那么表示3个比特位的取值000、001、010、011、100、101对应的SSB分别为：SSB0、SSB3、SSB4、SSB5、SSB6、SSB7。110、111不存在对应的SSB。若该第三指示信息占用的3个比特的取值为001，那么第一SSB为SSB3。
可选的，在随机接入过程中，网络设备发送的DCI可以携带上述第三指示信息。在完成随机接入后或者其他场景下，网络设备发送的DCI可以不携带该第三指示信息。
S503、网络设备在与该第一SSB关联的波束上向该终端设备发送随机接入响应。相应的，终端设备在与第一SSB关联的波束上接收该随机接入响应。
需要说明的是，步骤S503的执行过程可参见图3中步骤S302的具体描述，此处不再赘述。
在本申请实施例中，网络设备在第一SSB关联的波束上发送随机接入响应，并通过第三指示信息指示第一SSB，使得终端设备可以直接在第一SSB关联的波束上接收PDSCH，进而解调PDSCH payload以得到随机接入响应，从而有助于提高终端设备接收到随机接入响应的可能性，进一步有利于提高随机接入成功的概率。
以上各个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。
请参阅图6，图6是本申请实施例提供的一种通信装置的结构示意图。如图6所示，该通信装置60包括发送单元601和接收单元602。通信装置60可以执行前述方法实施例中终端设备、网络设备的相关步骤。
对于通信装置60用于实现上述实施例中终端设备的功能的情况：
发送单元601，用于在至少两个RO上分别向网络设备发送随机接入请求；
接收单元602，用于在与第一SSB关联的波束上接收来自该网络设备的随机接入响应， 第一SSB为与上述至少两个RO关联的SSB中的一个SSB。
在一种可选的实施方式中，第一SSB与上述至少两个RO中的第i个RO关联，i为大于或等于1的正整数。
在一种可选的实施方式中，接收单元602还可以用于：接收来自网络设备的第一指示信息，第一指示信息用于指示i。
在一种可选的实施方式中，发送单元601还可以用于：向网络设备发送第二指示信息，该第二指示信息用于指示i。
在一种可选的实施方式中，接收单元602用于在与第一SSB关联的波束上接收来自网络设备的随机接入响应时，具体用于：根据第一RA-RNTI，在与第一SSB关联的波束上接收来自网络设备的随机接入响应，其中，第一RA-RNTI是根据第i个RO的时频资源位置确定的。
在一种可选的实施方式中，第一SSB的信号强度在与上述至少两个RO关联的SSB中最大。
在一种可选的实施方式中，接收单元602还可以用于：接收来自网络设备的第三指示信息，该第三指示信息用于指示第一SSB。
在一种可选的实施方式中，接收单元602用于接收来自所述网络设备的第三指示信息时，具体用于：接收来自网络设备的DCI，该DCI包括第三指示信息。
在一种可选的实施方式中，第三指示信息占用n或个比特；其中，n为与上述述至少两个RO关联的SSB的总个数，或者，n为终端设备的服务小区内SSB的总个数，或者，n为终端设备的服务小区实际使用的SSB的总个数。
在一种可选的实施方式中，接收单元602用于在与第一SSB关联的波束上接收来自网络设备的随机接入响应时，具体用于：根据第一RA-RNTI，在与第一SSB关联的波束上接收来自网络设备的随机接入响应；其中，第一RA-RNTI是根据上述至少两个RO的时频资源位置确定的，或者，第一RA-RNTI是根据上述至少两个RO中一个RO的时频资源位置确定的。
具体的，在这种情况中，发送单元601、接收单元602所执行的操作可以参照上述图3-图5对应的实施例中有关终端设备的介绍。
对于通信装置60用于实现上述实施例中网络设备的功能的情况：
接收单元602，用于在至少两个RO上分别接收来自终端设备的随机接入请求；
发送单元601，用于在与第一SSB关联的波束上向该终端设备发送随机接入响应，第一SSB为与上述至少两个RO关联的SSB中的一个SSB。
在一种可选的实施方式中，第一SSB与上述至少两个RO中的第i个RO关联，i为大于或等于1的正整数。
在一种可选的实施方式中，发送单元601还可以用于：向终端设备发送第一指示信息，该第一指示信息用于指示i。
在一种可选的实施方式中，接收单元602还可以用于：接收来自该终端设备的第二指示信息，该第二指示信息用于指示i。
在一种可选的实施方式中，发送单元601用于在与第一SSB关联的波束上向终端设备 发送随机接入响应时，具体用于：根据第一RA-RNTI，在与第一SSB关联的波束上向终端设备发送随机接入响应，其中，第一RA-RNTI是根据第i个RO的时频资源位置确定的。
在一种可选的实施方式中，第一SSB的信号强度在与上述至少两个RO关联的SSB中最大。
在一种可选的实施方式中，发送单元601还可以用于：向终端设备发送第三指示信息，该第三指示信息用于指示第一SSB。
在一种可选的实施方式中，发送单元601用于向终端设备发送第三指示信息时，具体用于：向终端设备发送DCI，该DCI包括第三指示信息。
在一种可选的实施方式中，第三指示信息占用n或个比特；其中，n为与上述至少两个RO关联的SSB的总个数，或者，n为终端设备的服务小区内SSB的总个数，或者，n为终端设备的服务小区实际使用的SSB的总个数。
在一种可选的实施方式中，发送单元601用于在与第一SSB关联的波束上向终端设备发送随机接入响应时，具体用于：根据第一RA-RNTI，在与第一SSB关联的波束上向终端设备发送随机接入响应；其中，第一RA-RNTI是根据上述至少两个RO的时频资源位置确定的，或者，第一RA-RNTI是根据上述至少两个RO中一个RO的时频资源位置确定的。
具体的，在这种情况中，发送单元601、接收单元602所执行的操作可以参照上述图3-图5对应的实施例中有关网络设备的介绍。
请参阅图7，图7为本申请实施例提供的另一种通信装置70。可以用于实现上述方法实施例中终端设备的功能，或者，实现上述方法实施例中网络设备的功能。该通信装置70可以包括收发器701和处理器702。可选的，该通信装置还可以包括存储器703。其中，收发器701、处理器702、存储器703可以通过总线704或其他方式连接。总线在图7中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。总线可以分为地址总线、数据总线、控制总线等。为便于表示，图7中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。本申请实施例中不限定上述收发器701、处理器702、存储器703之间的具体连接介质。
存储器703可以包括只读存储器和随机存取存储器，并向处理器702提供指令和数据。存储器703的一部分还可以包括非易失性随机存取存储器。
处理器702可以是中央处理单元(Central Processing Unit，CPU)，该处理器702还可以是其他通用处理器、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、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器，可选的，该处理器702也可以是任何常规的处理器等。
一种示例中，当终端设备采用图7所示的形式时，图7中的处理器可以执行上述任一方法实施例中的终端设备执行的方法。
一种示例中，当网络设备采用图7所示的形式时，图7中的处理器可以执行上述任一方 法实施例中的网络设备执行的方法。
在一种可选的实施方式中，存储器703，用于存储程序指令；处理器702，用于调用存储器703中存储的程序指令，以用于执行图3-图5对应实施例中终端设备、网络设备所执行的步骤。具体的，图6的发送单元、接收单元的功能/实现过程均可以通过图7中的处理器702调用存储器703中存储的计算机执行指令来实现。或者，图5的发送单元、接收单元的功能/实现过程可以通过图7中的收发器701来实现。
在本申请实施例中，可以通过在包括CPU、随机存取存储介质(Random Access Memory，RAM)、只读存储介质(Read-Only Memory，ROM)等处理元件和存储元件的例如计算机的通用计算装置上运行能够执行上述方法所涉及的各步骤的计算机程序(包括程序代码)，以及来实现本申请实施例所提供的方法。计算机程序可以记载于例如计算机可读记录介质上，并通过计算机可读记录介质装载于上述计算装置中，并在其中运行。
基于同一发明构思，本申请实施例中提供的通信装置70解决问题的原理与有益效果与本申请方法实施例中终端设备、网络设备解决问题的原理和有益效果相似，可以参见方法的实施的原理和有益效果，为简洁描述，在这里不再赘述。
前述通信装置(如通信装置60、通信装置70)，例如可以是：芯片、或者芯片模组。
本申请实施例还提供一种芯片，该芯片可以执行前述方法实施例中终端设备、网络设备的相关步骤。
对于芯片用于实现上述实施例中终端设备的功能的情况：
该芯片用于：在至少两个RO上分别向网络设备发送随机接入请求；并在与第一SSB关联的波束上接收来自该网络设备的随机接入响应，第一SSB为与上述至少两个RO关联的SSB中的一个SSB。
在一种可选的实施方式中，SSB与上述至少两个RO中的第i个RO关联，i为大于或等于1的正整数。
在一种可选的实施方式中，该芯片还可以用于：接收来自网络设备的第一指示信息，第一指示信息用于指示i。
在一种可选的实施方式中，该芯片还可以用于：向网络设备发送第二指示信息，该第二指示信息用于指示i。
在一种可选的实施方式中，该芯片用于在与第一SSB关联的波束上接收来自网络设备的随机接入响应时，具体用于：根据第一RA-RNTI，在与第一SSB关联的波束上接收来自网络设备的随机接入响应，其中，第一RA-RNTI是根据第i个RO的时频资源位置确定的。
在一种可选的实施方式中，第一SSB的信号强度在与上述至少两个RO关联的SSB中最大。
在一种可选的实施方式中，该芯片还可以用于：接收来自网络设备的第三指示信息，该第三指示信息用于指示第一SSB。
在一种可选的实施方式中，该芯片用于接收来自所述网络设备的第三指示信息时，具体用于：接收来自网络设备的DCI，该DCI包括第三指示信息。
在一种可选的实施方式中，第三指示信息占用n或个比特；其中，n为与上述 述至少两个RO关联的SSB的总个数，或者，n为终端设备的服务小区内SSB的总个数，或者，n为终端设备的服务小区实际使用的SSB的总个数。
在一种可选的实施方式中，该芯片用于在与第一SSB关联的波束上接收来自网络设备的随机接入响应时，具体用于：根据第一RA-RNTI，在与第一SSB关联的波束上接收来自网络设备的随机接入响应；其中，第一RA-RNTI是根据上述至少两个RO的时频资源位置确定的，或者，第一RA-RNTI是根据上述至少两个RO中一个RO的时频资源位置确定的。
具体的，在这种情况中，芯片所执行的操作可以参照上述图3-图5对应的实施例中有关终端设备的介绍。
对于芯片用于实现上述实施例中网络设备的功能的情况：
该芯片用于：在至少两个RO上分别接收来自终端设备的随机接入请求；并在与第一SSB关联的波束上向该终端设备发送随机接入响应，第一SSB为与上述至少两个RO关联的SSB中的一个SSB。
在一种可选的实施方式中，第一SSB与上述至少两个RO中的第i个RO关联，i为大于或等于1的正整数。
在一种可选的实施方式中，该芯片还可以用于：向终端设备发送第一指示信息，该第一指示信息用于指示i。
在一种可选的实施方式中，该芯片还可以用于：接收来自该终端设备的第二指示信息，该第二指示信息用于指示i。
在一种可选的实施方式中，该芯片用于在与第一SSB关联的波束上向终端设备发送随机接入响应时，具体用于：根据第一RA-RNTI，在与第一SSB关联的波束上向终端设备发送随机接入响应，其中，第一RA-RNTI是根据第i个RO的时频资源位置确定的。
在一种可选的实施方式中，第一SSB的信号强度在与上述至少两个RO关联的SSB中最大。
在一种可选的实施方式中，该芯片还可以用于：向终端设备发送第三指示信息，该第三指示信息用于指示第一SSB。
在一种可选的实施方式中，该芯片用于向终端设备发送第三指示信息时，具体用于：向终端设备发送DCI，该DCI包括第三指示信息。
在一种可选的实施方式中，第三指示信息占用n或个比特；其中，n为与上述至少两个RO关联的SSB的总个数，或者，n为终端设备的服务小区内SSB的总个数，或者，n为终端设备的服务小区实际使用的SSB的总个数。
在一种可选的实施方式中，该芯片用于在与第一SSB关联的波束上向终端设备发送随机接入响应时，具体用于：根据第一RA-RNTI，在与第一SSB关联的波束上向终端设备发送随机接入响应；其中，第一RA-RNTI是根据上述至少两个RO的时频资源位置确定的，或者，第一RA-RNTI是根据上述至少两个RO中一个RO的时频资源位置确定的。
具体的，在这种情况中，芯片所执行的操作可以参照上述图3-图5对应的实施例中有关网络设备的介绍。
在一种可能的实现方式中，上述芯片包括至少一个处理器、至少一个第一存储器和至少一个第二存储器；其中，前述至少一个第一存储器和前述至少一个处理器通过线路互联， 前述第一存储器中存储有指令；前述至少一个第二存储器和前述至少一个处理器通过线路互联，前述第二存储器中存储前述方法实施例中需要存储的数据。
对于应用于或集成于芯片的各个装置、产品，其包含的各个模块可以都采用电路等硬件的方式实现，或者，至少部分模块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)部分模块可以采用电路等硬件方式实现。
请参阅图8，图8为本申请实施例提供的一种芯片模组的结构示意图。该芯片模组80可以执行前述方法实施例中终端设备、网络设备的相关步骤，该芯片模组80包括：通信接口801和芯片802。
其中，通信接口用于进行芯片模组内部通信，或者用于该芯片模组与外部设备进行通信；该芯片用于实现本申请实施例中终端设备、网络设备的功能，具体参见图3-图5对应实施例。可选的，芯片模组80还可以包括存储模组803、电源模组804。存储模组803用于存储数据和指令。电源模组804用于为芯片模组提供电能。
对于应用于或集成于芯片模组的各个装置、产品，其包含的各个模块可以都采用电路等硬件的方式实现，不同的模块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)部分模块可以采用电路等硬件方式实现。
本申请实施例还提供一种计算机可读存储介质，计算机可读存储介质中存储有一条或多条指令，一条或多条指令适于由处理器加载并执行上述方法实施例所提供的方法。
本申请实施例还提供一种包含计算机程序或指令的计算机程序产品，当计算机程序或指令在计算机上运行时，使得计算机执行上述方法实施例所提供的方法。
本申请实施例还提供一种通信***，该***可以包括图3-图5对应实施例中的终端设备和网络设备。
关于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。
需要说明的是，对于前述的各个方法实施例，为了简单描述，故将其都表述为一系列 的动作组合，但是本领域技术人员应该知悉，本申请并不受所描述的动作顺序的限制，因为依据本申请，某一些步骤可以采用其他顺序或者同时进行。其次，本领域技术人员也应该知悉，说明书中所描述的实施例均属于优选实施例，所涉及的动作和模块并不一定是本申请所必须的。
本申请实施例方法中的步骤可以根据实际需要进行顺序调整、合并和删减。
本申请实施例装置中的模块可以根据实际需要进行合并、划分和删减。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序可以存储于一计算机可读存储介质中，可读存储介质可以包括：闪存盘、ROM、RAM、磁盘或光盘等。
以上所揭露的仅为本申请一种较佳实施例而已，仅仅是本申请一部分实施例，不能以此来限定本申请之权利范围。

Claims (27)

  1. 一种通信方法，其特征在于，所述方法包括：
    终端设备在至少两个随机接入时机RO上分别向网络设备发送随机接入请求；
    所述终端设备在与第一同步信号块SSB关联的波束上接收来自所述网络设备的随机接入响应，所述第一SSB为与所述至少两个RO关联的SSB中的一个SSB。
  2. 根据权利要求1所述的方法，其特征在于，所述第一SSB与所述至少两个RO中的第i个RO关联，所述i为大于或等于1的正整数。
  3. 根据权利要求2所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收来自所述网络设备的第一指示信息，所述第一指示信息用于指示所述i。
  4. 根据权利要求2所述的方法，其特征在于，所述方法还包括：
    所述终端设备向所述网络设备发送第二指示信息，所述第二指示信息用于指示所述i。
  5. 根据权利要求2-4任一所述的方法，其特征在于，所述终端设备在与第一SSB关联的波束上接收来自所述网络设备的随机接入响应，包括：
    所述终端设备根据第一随机接入无线网络临时标识RA-RNTI，在与第一SSB关联的波束上接收来自所述网络设备的随机接入响应，其中，所述第一RA-RNTI是根据所述第i个RO的时频资源位置确定的。
  6. 根据权利要求2-4任一所述的方法，其特征在于，所述第一SSB的信号强度在与所述至少两个RO关联的SSB中最大。
  7. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收来自所述网络设备的第三指示信息，所述第三指示信息用于指示所述第一SSB。
  8. 根据权利要求7所述的方法，其特征在于，所述终端设备接收来自所述网络设备的第三指示信息，包括：
    所述终端设备接收来自所述网络设备的下行控制信息DCI，所述DCI包括第三指示信息。
  9. 根据权利要求7或8所述的方法，其特征在于，所述第三指示信息占用n或个比特；其中，所述n为与所述至少两个RO关联的SSB的总个数，或者，
    所述n为所述终端设备的服务小区内SSB的总个数，或者，
    所述n为所述终端设备的服务小区实际使用的SSB的总个数。
  10. 根据权利要求1-9任一项所述的方法，其特征在于，所述终端设备在与第一SSB关联的波束上接收来自所述网络设备的随机接入响应，包括：
    所述终端设备根据第一RA-RNTI，在与第一SSB关联的波束上接收来自所述网络设备的随机接入响应；其中，所述第一RA-RNTI是根据所述至少两个RO的时频资源位置确定的，或者，所述第一RA-RNTI是根据所述至少两个RO中一个RO的时频资源位置确定的。
  11. 一种通信方法，其特征在于，所述方法包括：
    网络设备在至少两个随机接入时机RO上分别接收来自终端设备的随机接入请求；
    所述网络设备在与第一同步信号块SSB关联的波束上向所述终端设备发送随机接入响应，所述第一SSB为与所述至少两个RO关联的SSB中的一个SSB。
  12. 根据权利要求11所述的方法，其特征在于，所述第一SSB与所述至少两个RO中的第i个RO关联，所述i为大于或等于1的正整数。
  13. 根据权利要求12所述的方法，其特征在于，所述方法还包括：
    所述网络设备向所述终端设备发送第一指示信息，所述第一指示信息用于指示所述i。
  14. 根据权利要求12所述的方法，其特征在于，所述方法还包括：
    所述网络设备接收来自所述终端设备的第二指示信息，所述第二指示信息用于指示所述i。
  15. 根据权利要求12-14任一所述的方法，其特征在于，所述网络设备在与第一SSB关联的波束上向所述终端设备发送随机接入响应，包括：
    所述网络设备根据第一随机接入无线网络临时标识RA-RNTI，在与第一SSB关联的波束上向所述终端设备发送随机接入响应，其中，所述第一RA-RNTI是根据所述第i个RO的时频资源位置确定的。
  16. 根据权利要求12-14任一所述的方法，其特征在于，所述第一SSB的信号强度在与所述至少两个RO关联的SSB中最大。
  17. 根据权利要求11所述的方法，其特征在于，所述方法还包括：
    所述网络设备向所述终端设备发送第三指示信息，所述第三指示信息用于指示所述第一SSB。
  18. 根据权利要求17所述的方法，其特征在于，所述网络设备向所述终端设备发送第三指示信息，包括：
    所述网络设备向所述终端设备发送下行控制信息DCI，所述DCI包括第三指示信息。
  19. 根据权利要求17或18所述的方法，其特征在于，所述第三指示信息占用n或个比特；其中，所述n为与所述至少两个RO关联的SSB的总个数，或者，
    所述n为所述终端设备的服务小区内SSB的总个数，或者，
    所述n为所述终端设备的服务小区实际使用的SSB的总个数。
  20. 根据权利要求11-19任一项所述的方法，其特征在于，所述网络设备在与第一SSB关联的波束上向所述终端设备发送随机接入响应，包括：
    所述网络设备根据第一RA-RNTI，在与第一SSB关联的波束上向所述终端设备发送随机接入响应；其中，所述第一RA-RNTI是根据所述至少两个RO的时频资源位置确定的，或者，所述第一RA-RNTI是根据所述至少两个RO中一个RO的时频资源位置确定的。
  21. 一种通信装置，其特征在于，所述装置包括发送单元和接收单元；
    所述发送单元，用于在至少两个随机接入时机RO上分别向网络设备发送随机接入请求；
    所述接收单元，用于在与第一同步信号块SSB关联的波束上接收来自所述网络设备的随机接入响应，所述第一SSB为与所述至少两个RO关联的SSB中的一个SSB。
  22. 一种通信装置，其特征在于，所述装置包括接收单元和发送单元；
    所述接收单元，用于在至少两个随机接入时机RO上分别接收来自终端设备的随机接入请求；
    所述发送单元，用于在与第一同步信号块SSB关联的波束上向所述终端设备发送随机接入响应，所述第一SSB为与所述至少两个RO关联的SSB中的一个SSB。
  23. 一种通信装置，其特征在于，包括处理器；
    所述处理器，用于执行如权利要求1～20中任一项所述的方法。
  24. 一种芯片，其特征在于，
    所述芯片，用于：
    在至少两个随机接入时机RO上分别向网络设备发送随机接入请求；
    在与第一同步信号块SSB关联的波束上接收来自所述网络设备的随机接入响应，所述第一SSB为与所述至少两个RO关联的SSB中的一个SSB。
  25. 一种芯片，其特征在于，
    所述芯片，用于：
    在至少两个随机接入时机RO上分别接收来自终端设备的随机接入请求；
    在与第一同步信号块SSB关联的波束上向所述终端设备发送随机接入响应，所述第一SSB为与所述至少两个RO关联的SSB中的一个SSB。
  26. 一种芯片模组，其特征在于，所述芯片模组包括通信接口和芯片，其中：
    所述通信接口用于进行芯片模组内部通信，或者用于所述芯片模组与外部设备进行通信；
    所述芯片用于：
    在至少两个随机接入时机RO上分别向网络设备发送随机接入请求；
    在与第一同步信号块SSB关联的波束上接收来自所述网络设备的随机接入响应，所述第一SSB为与所述至少两个RO关联的SSB中的一个SSB。
  27. 一种芯片模组，其特征在于，所述芯片模组包括通信接口和芯片，其中：
    所述通信接口用于进行芯片模组内部通信，或者用于所述芯片模组与外部设备进行通信；
    所述芯片用于：
    在至少两个随机接入时机RO上分别接收来自终端设备的随机接入请求；
    在与第一同步信号块SSB关联的波束上向所述终端设备发送随机接入响应，所述第一SSB为与所述至少两个RO关联的SSB中的一个SSB。
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