WO2022021225A1 - Procédé de communication sans fil, dispositif de terminal et dispositif de réseau - Google Patents

Procédé de communication sans fil, dispositif de terminal et dispositif de réseau Download PDF

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Publication number
WO2022021225A1
WO2022021225A1 PCT/CN2020/105879 CN2020105879W WO2022021225A1 WO 2022021225 A1 WO2022021225 A1 WO 2022021225A1 CN 2020105879 W CN2020105879 W CN 2020105879W WO 2022021225 A1 WO2022021225 A1 WO 2022021225A1
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WIPO (PCT)
Prior art keywords
ssb
frequency
cell
sib1
terminal device
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PCT/CN2020/105879
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English (en)
Chinese (zh)
Inventor
胡奕
李海涛
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to CN202080101127.6A priority Critical patent/CN115669126A/zh
Priority to PCT/CN2020/105879 priority patent/WO2022021225A1/fr
Publication of WO2022021225A1 publication Critical patent/WO2022021225A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the embodiments of the present application relate to the field of communication, and more particularly, to a wireless communication method, terminal device, and network device.
  • the fifth-generation mobile communication technology 5-Generation New Radio (5G NR) system defines the deployment scenarios of non-terrestrial networks (NTN) systems including satellite networks.
  • NTN non-terrestrial networks
  • the NTN system can realize the continuity of 5G NR services.
  • different frequency points/carriers/frequency bands can be used for adjacent satellite beams during network deployment.
  • MIB Master Information Block
  • SIB System Information Block
  • the beam directions of each Synchronization Signal Block (SSB) are traversed at the same frequency position for repeated transmission. . How to avoid co-channel interference between different SSB beams is an urgent problem to be solved.
  • the embodiments of the present application provide a wireless communication method, terminal equipment, and network equipment.
  • the frequency hopping transmission can be effectively reduced.
  • Co-channel interference between different SSBs improves the initial access performance of terminal equipment.
  • a wireless communication method comprising:
  • the terminal device searches for SSBs at frequency positions corresponding to multiple synchronization grids, wherein the multiple synchronization grids respectively correspond to the SSB transmission of different satellite beams, or the multiple synchronization grids respectively correspond to different satellite beams .
  • a wireless communication method comprising:
  • the network device transmits SSB at frequency positions corresponding to multiple synchronization grids, wherein the multiple synchronization grids respectively correspond to the SSB transmission of different satellite beams, or the multiple synchronization grids respectively correspond to different satellite beams .
  • a wireless communication method comprising:
  • the terminal device receives the PDCCH sent by the network device in a frequency hopping manner and used to indicate the transmission of SIB1.
  • a wireless communication method comprising:
  • the network device transmits the PDCCH for indicating the transmission of SIB1 in a frequency hopping manner.
  • a terminal device for executing the method in the above-mentioned first aspect.
  • the terminal device includes functional modules for executing the method in the first aspect.
  • a network device for executing the method in the second aspect.
  • the network device includes functional modules for executing the method in the second aspect above.
  • a terminal device for executing the method in the third aspect.
  • the terminal device includes functional modules for executing the method in the third aspect.
  • a network device for executing the method in the fourth aspect.
  • the network device includes functional modules for executing the method in the fourth aspect above.
  • a terminal device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the first aspect.
  • a network device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect.
  • a terminal device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the third aspect.
  • a twelfth aspect provides a network device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the fourth aspect.
  • a thirteenth aspect provides an apparatus for implementing the method in any one of the above-mentioned first to fourth aspects.
  • the apparatus includes: a processor for invoking and running a computer program from a memory, so that a device on which the apparatus is installed executes the method in any one of the first to fourth aspects above.
  • a fourteenth aspect provides a computer-readable storage medium for storing a computer program, the computer program causing a computer to perform the method in any one of the above-mentioned first to fourth aspects.
  • a fifteenth aspect provides a computer program product comprising computer program instructions, the computer program instructions causing a computer to perform the method of any one of the above-mentioned first to fourth aspects.
  • a sixteenth aspect provides a computer program which, when run on a computer, causes the computer to perform the method of any one of the above-mentioned first to fourth aspects.
  • the network device transmits the SSB at different frequency positions, that is, the network device transmits the SSB by frequency hopping, which can effectively reduce the co-channel interference between different SSBs and improve the initial connection of the terminal device. into performance.
  • the network equipment adopts the frequency hopping method to send the PDCCH used to indicate the transmission of SIB1.
  • the PDCCH frequency hopping transmission By introducing the PDCCH frequency hopping transmission, the same-frequency interference between different SSBs can be effectively reduced, and the terminal can be improved.
  • the initial access performance of the device By introducing the PDCCH frequency hopping transmission, the same-frequency interference between different SSBs can be effectively reduced, and the terminal can be improved. The initial access performance of the device.
  • FIG. 1 is a schematic diagram of a communication system architecture to which an embodiment of the present application is applied.
  • FIG. 2 is a schematic diagram of a satellite beam provided by the present application.
  • FIG. 3 is a schematic flowchart of a wireless communication method provided according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of sending an SSB according to an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of another wireless communication method provided according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of sending a PDCCH for indicating SIB1 transmission according to an embodiment of the present application.
  • FIG. 7 is another schematic diagram of sending a PDCCH for indicating SIB1 transmission according to an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.
  • FIG. 9 is a schematic block diagram of a network device provided according to an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of another terminal device provided according to an embodiment of the present application.
  • FIG. 11 is a schematic block diagram of another network device provided according to an embodiment of the present application.
  • FIG. 12 is a schematic block diagram of a communication device provided according to an embodiment of the present application.
  • Fig. 13 is a schematic block diagram of an apparatus provided according to an embodiment of the present application.
  • Fig. 14 is a schematic block diagram of a communication system provided according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • CDMA Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • NR New Radio
  • NTN Non-Terrestrial Networks
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • Wireless Fidelity Wireless Fidelity
  • WiFi fifth-generation communication
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • V2X Vehicle to everything
  • the communication system in this embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) distribution. web scene.
  • Carrier Aggregation, CA Carrier Aggregation, CA
  • DC Dual Connectivity
  • SA standalone
  • the communication system in the embodiment of the present application may be applied to an unlicensed spectrum, where the unlicensed spectrum may also be considered as a shared spectrum; or, the communication system in the embodiment of the present application may also be applied to a licensed spectrum, where, Licensed spectrum can also be considered unshared spectrum.
  • the embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, where the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • user equipment User Equipment, UE
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • the terminal device can be a station (STATION, ST) in the WLAN, can be a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, next-generation communication systems such as end devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.
  • PLMN Public Land Mobile Network
  • the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons, and satellites) superior).
  • the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, and an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city or wireless terminal equipment in smart home, etc.
  • a mobile phone Mobile Phone
  • a tablet computer Pad
  • a computer with a wireless transceiver function a virtual reality (Virtual Reality, VR) terminal device
  • augmented reality (Augmented Reality, AR) terminal Equipment wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city or wireless terminal equipment in smart home, etc.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • the network device may be a device for communicating with a mobile device, and the network device may be an access point (Access Point, AP) in WLAN, or a base station (Base Transceiver Station, BTS) in GSM or CDMA , it can also be a base station (NodeB, NB) in WCDMA, it can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or in-vehicle equipment, wearable devices and NR networks
  • the network device may have a mobile feature, for example, the network device may be a mobile device.
  • the network device may be a satellite or a balloon station.
  • the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a High Elliptical Orbit (HEO) ) satellite etc.
  • the network device may also be a base station set in a location such as land or water.
  • a network device may provide services for a cell, and a terminal device communicates with the network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device (
  • the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell).
  • Pico cell Femto cell (Femto cell), etc.
  • These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal).
  • the network device 110 may provide communication coverage for a particular geographic area, and may communicate with terminal devices located within the coverage area.
  • FIG. 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. This application The embodiment does not limit this.
  • the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.
  • a device having a communication function in the network/system may be referred to as a communication device.
  • the communication device may include a network device 110 and a terminal device 120 with a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as other network entities such as a network controller, a mobility management entity, etc., which are not limited in this embodiment of the present application.
  • the "instruction" mentioned in the embodiments of the present application may be a direct instruction, an indirect instruction, or an associated relationship.
  • a indicates B it can indicate that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indicates B indirectly, such as A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • corresponding may indicate that there is a direct or indirect corresponding relationship between the two, or may indicate that there is an associated relationship between the two, or indicate and be instructed, configure and be instructed configuration, etc.
  • the 5G NR system defines the deployment scenarios of NTN systems including satellite networks.
  • NTN generally uses satellite communication to provide communication services to terrestrial users.
  • satellite communication has many unique advantages.
  • satellite communication is not limited by the user's geographical area.
  • general terrestrial communication cannot cover areas such as oceans, mountains, deserts, etc. where communication equipment cannot be set up or cannot be covered due to sparse population.
  • satellite communication due to a single Satellites can cover a large ground, and satellites can orbit around the earth, so theoretically every corner of the earth can be covered by satellite communications.
  • satellite communication has great social value.
  • Satellite communications can be covered at low cost in remote mountainous areas and poor and backward countries or regions, so that people in these regions can enjoy advanced voice communication and mobile Internet technologies, which is conducive to narrowing the digital divide with developed regions and promoting development in these areas.
  • the satellite communication distance is long, and the communication cost does not increase significantly when the communication distance increases; finally, the satellite communication has high stability and is not limited by natural disasters.
  • Communication satellites are classified into Low-Earth Orbit (LEO) satellites, Medium-Earth Orbit (MEO) satellites, Geostationary Earth Orbit (GEO) satellites, and highly elliptical orbits according to different orbital altitudes. (High Elliptical Orbit, HEO) satellites, etc.
  • LEO Low-Earth Orbit
  • MEO Medium-Earth Orbit
  • GEO Geostationary Earth Orbit
  • HEO High Elliptical Orbit
  • the altitude range of LEO satellites is 500km to 1500km, and the corresponding orbital period is about 1.5 hours to 2 hours.
  • the signal propagation delay of single-hop communication between users is generally less than 20ms.
  • the maximum satellite viewing time is 20 minutes.
  • the signal propagation distance is short, the link loss is small, and the transmit power requirements of the user terminal are not high.
  • the orbital altitude of the GEO satellite is 35786km, and the rotation period around the earth is 24 hours.
  • the signal propagation delay of single-hop communication between users is generally 250ms.
  • the satellite uses multiple beams to cover the ground.
  • a satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover dozens of diameters. to hundreds of kilometers of ground.
  • a satellite beam is the smallest unit that a satellite covers the earth's surface, corresponding to different directions. Usually, a satellite covers the earth's surface through hundreds or thousands of satellite beams. These satellite beams can be deployed as different cells or within the same cell. Considering the possible co-channel interference between adjacent satellite beams, a frequency reuse factor greater than 1 is generally considered, that is, adjacent satellite beams are distinguished by different frequency points/carriers/frequency bands, as shown in Figure 3, Satellite beams with the same pattern use the same frequency point/carrier/band.
  • NR can also be deployed independently.
  • RRC Radio Resource Control
  • RRC_INACTIVE active
  • RRC_CONNECTED connected
  • RRC_IDLE mobility is based on terminal device cell selection and reselection, paging is initiated by the Core Network (CN), and the paging area is configured by the CN.
  • CN Core Network
  • AS terminal device access layer
  • RRC_CONNECTED state there is an RRC connection, and the base station and the terminal device have the terminal device AS context.
  • the network equipment knows the location of the terminal equipment at the specific cell level. Mobility is the mobility of network device control. Unicast data can be transmitted between the terminal equipment and the base station.
  • RRC_INACTIVE Mobility is based on terminal device cell selection and reselection, there is a connection between CN-NR, terminal device AS context exists on a certain base station, paging is triggered by Radio Access Network (RAN), based on The paging area of the RAN is managed by the RAN, and the network equipment knows the location of the terminal device based on the level of the paging area of the RAN.
  • RAN Radio Access Network
  • the inactive state may also be referred to as a deactivated state, which is not limited in this application.
  • cell search should be performed first after entering the network.
  • the main purpose of cell search is to discover cells. Since the UE generally lacks prior knowledge of the actual deployment of the cell, during the cell search process, the UE needs to scan the frequency range of the potential cell to determine the cell location, Then obtain cell information and attempt to initiate cell access.
  • a sync grid is a series of frequency bins that can be used to send a sync signal.
  • a cell needs to be established, and the cell needs to have a specific synchronization signal.
  • the configurable position of the synchronization signal corresponds to the synchronization grid position.
  • point A in the frequency domain is a frequency point in a synchronization grid.
  • the center of the cell's synchronization signal can be configured at point A.
  • the UE is on frequency A
  • searching for a cell in the frequency band where the point is located the cell can be found through the synchronization signal on point A, thereby accessing the cell.
  • the SSB can be used for the initial access of the UE, and can also be configured as a measurement reference signal for the UE for measurement.
  • the former is used for UE access cells, and its frequency domain location is on the synchronization grid and is associated with SIB1 information; the latter is not associated with SIB1 information, even if its frequency domain location is also on the synchronization grid, it cannot be used for UE access. into the community.
  • the former is called a cell-defining SSB (Cell-Defining SSB), and the latter is called a non-cell-defining SSB (Non Cell-Defining SSB). That is, the UE can access the cell only through the cell-defined SSB.
  • Non-cell-defining SSBs may also be configured at the location of the synchronization grid.
  • two types of SSBs may be searched.
  • the non-cell-defined SSB is searched, since the SSB is not associated with SIB1 information, the UE cannot pass through the SSB.
  • the MIB information carried by the physical layer broadcast channel Physical Broadcast Channel, PBCH
  • PBCH Physical Broadcast Channel
  • the base station may carry an indication message in the non-cell-defined SSB to indicate the frequency between the global synchronization channel number (GSCN) where the cell-defined SSB is located and the GSCN where the currently searched non-cell-defined SSB is located. offset.
  • GSCN global synchronization channel number
  • the UE can directly search for the cell-defined SSB at the pointed target GSCN position based on the auxiliary information, thereby avoiding the blind search of the cell-defined SSB by the UE, and reducing the time delay and power consumption of the cell search.
  • the GSCN offset information is indicated by the information carried by the PBCH.
  • the UE During the initial access process, the UE tries to search for the SSB through the possible time-frequency positions of the defined SSB, and obtains time and frequency synchronization, radio frame timing and physical cell identity (ID) through the detected SSB. Further, the UE can also determine the search space information of the Physical Downlink Control Channel (PDCCH) that schedules the Physical Downlink Shared Channel (PDSCH) carrying the SIB1 through the MIB information carried in the PBCH, that is, the control resource set (Control Resource Set, CORESET) #0 and search space (search space) #0.
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • the UE Based on the MIB indication, the UE monitors the PDCCH that schedules the PDSCH carrying the SIB1 on the search space #0, so as to obtain the SIB1 information.
  • adjacent satellite beams may use different frequency points/carriers/frequency bands.
  • a satellite beam usually contains one or more SSB beams.
  • SSB beams For the transmission of MIB and SIB, all SSB beam directions are traversed at the same frequency position for repeated transmission. In this case, co-channel interference may occur between different SSB beams. How to avoid co-channel interference between different SSB beams is an urgent problem to be solved.
  • this application proposes a frequency hopping scheme.
  • the same frequency between different SSBs can be effectively reduced interference, and improve the initial access performance of the terminal device.
  • FIG. 3 is a schematic flowchart of a wireless communication method 200 according to an embodiment of the present application. As shown in FIG. 3 , the method 200 may include at least part of the following contents:
  • the network device transmits SSB at frequency positions corresponding to multiple synchronization grids, wherein the multiple synchronization grids respectively correspond to the SSB transmission of different satellite beams, or the multiple synchronization grids respectively correspond to different satellite beams ;
  • the terminal device searches for the SSB at the frequency positions corresponding to the multiple synchronization grids.
  • the embodiments of the present application are applied to a deployment scenario of adjacent satellite beam frequency reuse in the NTN.
  • the embodiments of the present application are applied to an initial access process of a terminal device.
  • it can also be applied to some other scenarios, which is not limited in this application.
  • a synchronization grid is a series of frequency points that can be used to transmit synchronization signals. For details, reference may be made to the above description about the synchronization grid, which will not be repeated here.
  • the multiple synchronization grids respectively correspond to the SSB transmission of different satellite beams, or the multiple synchronization grids respectively correspond to different satellite beams.
  • at least one satellite beam corresponds to at least one One SSB is transmitted on one synchronization grid, and SSBs corresponding to different satellite beams are transmitted on different synchronization grids.
  • the network device sends the SSB at different frequency positions, that is, the network device sends the SSB by frequency hopping, which can effectively reduce the co-channel interference between different SSBs and improve the initial access performance of the terminal device. .
  • the SSB may also be referred to as a synchronization signal/physical broadcast channel block (synchronization signal/physical broadcast channel block, SS/PBCH block).
  • the SSB includes a Cell-Defining SSB (Cell-Defining SSB).
  • Cell-Defining SSB Cell-Defining SSB
  • the terminal device can define the SSB to access the cell through the cell.
  • the cell-defined SSBs sent at the frequency positions corresponding to the multiple synchronization grids correspond to the same cell. That is, the network device transmits cell-defined SSBs for the same cell at frequency positions corresponding to the multiple synchronization grids, where the multiple synchronization grids correspond to the transmission of cell-defined SSBs of different satellite beams.
  • the cell-defined SSB sent by the network device at a frequency position corresponding to a synchronization grid corresponds to at least one SSB beam included in a satellite beam.
  • the cell defines the MIB in the SSB for the terminal device to acquire control information for receiving SIB1 during the initial access process. That is, after searching for the cell-defined SSB, the terminal device may acquire control information for receiving SIB1 in the initial access process based on the MIB in the cell-defined SSB.
  • the terminal device when the terminal device searches for a cell-defined SSB at a frequency position corresponding to at least one synchronization grid in the plurality of synchronization grids, the terminal device obtains the control for receiving SIB1 according to the MIB in the cell-defined SSB information, and the terminal device receives SIB1 according to the control information.
  • the SIB1 may also be configured for frequency hopping transmission. That is to say, the embodiments of the present application can introduce MIB frequency hopping transmission and SIB frequency hopping transmission, which can effectively reduce the co-channel interference between different SSBs and improve the initial access performance of the terminal device.
  • the SSB includes a non-cell-defining SSB (Non Cell-Defining SSB).
  • the non-cell-defined SSB can be configured as a measurement reference signal to the terminal device for measurement.
  • the non-cell-defined SSB has no associated SIB1 information, and even if its frequency domain location is located on the synchronization grid, it cannot be used for terminal equipment to access the cell.
  • the network device sends the non-cell-defined SSB at the frequency position corresponding to multiple synchronization grids, and the multiple synchronization grids correspond to different
  • the non-cell of the satellite beam defines the transmission of the SSB.
  • the non-cell-defined SSB sent by the network device at a frequency position corresponding to a synchronization grid corresponds to at least one SSB beam included in a satellite beam.
  • the terminal device when the terminal device searches for a non-cell-defined SSB at a frequency position corresponding to at least one synchronization grid among the plurality of synchronization grids, the terminal device obtains the location of the cell-defined SSB according to the MIB in the non-cell-defined SSB.
  • the terminal device can obtain the control information for receiving SIB1 according to the MIB in the cell-defined SSB, and the terminal device can receive the SIB1 according to the control information. SIB1.
  • control information includes CORESET #0 and search space #0.
  • search space #0 may also be some other information, which is not limited in this application.
  • the frequency position for transmitting the non-cell-defined SSB is the same as the frequency offset value of the cell-defined SSB.
  • the network device sends the non-cell definition SSB1 at the frequency position corresponding to the synchronization grid 6 through the satellite beam 1, and the MIB in the non-cell definition SSB1 indicates the GSCN where the cell definition SSB1 is located and the non-cell definition SSB1 is located.
  • the frequency offset (offset) between the GSCNs is 6 synchronization grids, that is, the network device sends the cell definition SSB1 at the frequency position corresponding to the synchronization grid 12; the network device transmits the frequency corresponding to the synchronization grid 5 through the satellite beam 2.
  • the non-cell-defining SSB2 is sent at the location, and the MIB in the non-cell-defining SSB2 indicates that the frequency offset (offset) between the GSCN where the cell-defining SSB2 is located and the GSCN where the non-cell-defining SSB2 is located is also 6 synchronization grids, that is, the network equipment.
  • the cell definition SSB2 is sent at the frequency position corresponding to the synchronization grid 11; the network device sends the non-cell definition SSB3 at the frequency position corresponding to the synchronization grid 4 through the satellite beam 3.
  • the MIB in the non-cell definition SSB3 indicates the location of the cell definition SSB3.
  • the frequency offset (offset) between the GSCN and the GSCN where the non-cell-defined SSB3 is located is also 6 synchronization grids, that is, the network device sends the cell-defined SSB3 at the frequency position corresponding to the synchronization grid 10; the network device transmits the cell-defined SSB3 through the satellite beam 4
  • the non-cell-defined SSB4 is sent at the frequency position corresponding to synchronization grid 3
  • a synchronization grid that is, the network device sends the cell definition SSB4 at the frequency position corresponding to the synchronization grid 9 .
  • the network device in the deployment scenario of adjacent satellite beam frequency reuse in NTN, corresponding to the transmission of MIB and SIB, the network device sends the SSB at different frequency positions, that is, the network device sends the SSB by frequency hopping, It can effectively reduce the co-channel interference between different SSBs and improve the initial access performance of the terminal equipment.
  • FIG. 5 is a schematic flowchart of a wireless communication method 300 according to an embodiment of the present application. As shown in FIG. 5 , the method 300 may include at least part of the following contents:
  • the network device transmits the PDCCH for indicating the transmission of SIB1 in a frequency hopping manner
  • the terminal device receives the PDCCH sent by the network device in a frequency hopping manner and used to indicate the transmission of the SIB1.
  • the embodiments of the present application are applied to a deployment scenario of adjacent satellite beam frequency reuse in the NTN.
  • the embodiments of the present application are applied to an initial access process of a terminal device.
  • it can also be applied to some other scenarios, which is not limited in this application.
  • the frequency hopping manner includes:
  • the PDCCH in different SSB beam directions are sent at different frequency resource positions.
  • the frequency hopping manner is pre-configured or agreed in a protocol
  • the frequency hopping interval is pre-configured or agreed in a protocol
  • a satellite beam typically contains one or more SSB beams.
  • the PDCCH in different SSB beam directions are sent at different frequency resource positions, and also That is to say, in the embodiment of the present application, the network device transmits the PDCCH at different frequency positions, that is, the network device uses different frequency positions to transmit the PDCCH by frequency hopping during the process of traversing each SSB beam direction for transmission, which can effectively reduce the number of different SSBs.
  • the co-channel interference between them can improve the initial access performance of the terminal equipment.
  • the SSB may also be referred to as a synchronization signal/physical broadcast channel block (synchronization signal/physical broadcast channel block, SS/PBCH block).
  • the terminal device attempts to receive, on the PDCCH time-frequency resources corresponding to multiple SSB beams in the SSB beams traversed by the network device, a PDCCH for indicating SIB1 transmission; or, the terminal device The device attempts to receive the PDCCH indicating the transmission of SIB1 on the PDCCH time-frequency resource corresponding to one of the SSB beams traversed by the network device.
  • the PDCCH used to instruct SIB1 transmission is frequency hopping within the frequency range corresponding to CORESET#0.
  • the PDCCH used to instruct SIB1 in one SIB1 repetition period, traverse the directions of SSB beam 1, SSB beam 2, SSB beam 3 and SSB beam 4 within the frequency range corresponding to CORESET#0 for transmission.
  • PDCCHs of different SSB beam directions are sent on different frequency resource positions within the frequency range corresponding to CORESET#0.
  • the frequency hopping transmission modes are similar, and details are not described here.
  • the PDCCH used to instruct SIB1 transmission is transmitted in a frequency range corresponding to CORESET#0, where CORESET#0 corresponds to different frequency ranges in different time periods. As shown in Figure 7, CORESET#0 corresponds to different frequency ranges in different time periods.
  • the PDCCH used to instruct SIB1 to traverse SSB beam 1 and SSB beam within the frequency range corresponding to CORESET#0 2.
  • PDCCHs in different SSB beam directions are transmitted at different frequency resource positions within the frequency range corresponding to CORESET #0.
  • the frequency hopping transmission modes are similar, and details are not described here.
  • the network device may use a frequency hopping manner to send the PDCCH for indicating SIB1 transmission according to a first correspondence relationship, where the first correspondence relationship is the SSB beam index and time corresponding to sending the PDCCH.
  • the corresponding relationship of the window and the network device transmits the PDCCH within a frequency resource range corresponding to a corresponding SSB beam index within a time window.
  • the frequency resource range corresponding to SSB beam 1 is pre-configured or agreed in the agreement, and the frequency resource range corresponding to SSB beam n is determined according to the frequency resource range and frequency hopping interval corresponding to SSB beam n-1, n ⁇ 2, and n is an integer.
  • the frequency resource range corresponding to the SSB beam index is pre-configured or agreed upon in a protocol.
  • the first corresponding relationship is pre-configured or agreed in an agreement.
  • the network device adopts the PDCCH sent by frequency hopping to indicate the transmission of SIB1.
  • the PDCCH Frequency hopping transmission with SSB can effectively reduce the co-channel interference between different SSBs and improve the initial access performance of terminal equipment.
  • FIG. 8 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application.
  • the terminal device 400 includes:
  • the communication unit 410 is configured to search for a synchronization signal block SSB at a frequency position corresponding to a plurality of synchronization grids, wherein the plurality of synchronization grids respectively correspond to the SSB transmission of different satellite beams, or the plurality of synchronization grids respectively Corresponding to different satellite beams.
  • the terminal device 400 further includes: a processing unit 420,
  • the processing unit 420 is configured to obtain the master information block MIB in the cell-defined SSB for receiving The control information of the system information block SIB1, and the communication unit 410 is further configured to receive the SIB1 according to the control information.
  • the cell-defined SSBs sent at the frequency positions corresponding to the multiple synchronization grids correspond to the same cell.
  • the terminal device 400 further includes: a processing unit 420,
  • the processing unit 420 is configured to obtain the location of the cell-defined SSB according to the MIB in the non-cell-defined SSB.
  • the processing unit 420 is further configured to determine the GSCN where the cell-defined SSB is located according to the frequency offset, and the communication unit 410 is further configured to search for the cell-defined SSB on the GSCN where the cell-defined SSB is located.
  • the processing unit 420 is further configured to acquire control information for receiving the SIB1 according to the MIB in the cell-defined SSB, and the communication unit 410 is further configured to receive the SIB1 according to the control information.
  • control information includes control resource set CORESET #0 and search space #0.
  • the frequency position for transmitting the non-cell-defined SSB relative to the frequency offset value of the cell-defined SSB is the same.
  • At least one SSB corresponding to one satellite beam is transmitted on one synchronization grid, and SSBs corresponding to different satellite beams are transmitted on different synchronization grids.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the aforementioned processing unit may be one or more processors.
  • terminal device 400 may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 400 are respectively for realizing the method shown in FIG. 3 .
  • the corresponding process of the terminal device in 200 is not repeated here for brevity.
  • FIG. 9 shows a schematic block diagram of a network device 500 according to an embodiment of the present application.
  • the network device 500 includes:
  • the communication unit 410 is configured to send synchronization signal blocks SSB at frequency positions corresponding to multiple synchronization grids, wherein the multiple synchronization grids respectively correspond to the SSB transmission of different satellite beams, or the multiple synchronization grids are respectively Corresponding to different satellite beams.
  • the SSB includes a cell-defining SSB.
  • the cell-defined SSBs sent at the frequency positions corresponding to the multiple synchronization grids correspond to the same cell.
  • the master information block MIB in the cell-defined SSB is used for the terminal device to acquire control information for receiving the system information block SIB1 during the initial access process.
  • control information includes control resource set CORESET #0 and search space #0.
  • the SSB includes a non-cell-defined SSB.
  • the frequency position at which the network device transmits the non-cell-defined SSB is the same as the frequency offset value of the cell-defined SSB.
  • At least one SSB corresponding to one satellite beam is transmitted on one synchronization grid, and SSBs corresponding to different satellite beams are transmitted on different synchronization grids.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the network device 500 may correspond to the network device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 500 are for realizing the method shown in FIG. 3 respectively.
  • the corresponding process of the network device in 200 is not repeated here for brevity.
  • FIG. 10 shows a schematic block diagram of a terminal device 600 according to an embodiment of the present application.
  • the terminal device 600 includes:
  • the communication unit 610 is configured to receive the physical downlink control information PDCCH sent by the network device in a frequency hopping manner and used to indicate transmission of the system information block SIB1.
  • the frequency hopping manner includes:
  • the PDCCHs in different SSB beam directions are sent at different frequency resource positions.
  • the communication unit 610 is specifically used for:
  • the PDCCH used to instruct the SIB1 to transmit is frequency hopping within the frequency range corresponding to the control resource set CORESET#0.
  • the PDCCH used to indicate the transmission of the SIB1 is transmitted in the frequency range corresponding to CORESET#0, and the CORESET#0 corresponds to different frequency ranges in different time periods.
  • the frequency hopping manner is pre-configured or agreed in a protocol
  • the frequency hopping interval is pre-configured or agreed in a protocol.
  • the PDCCH used to instruct SIB1 transmission is sent by the network device according to the first correspondence
  • the first correspondence is a correspondence between an SSB beam index corresponding to the sending PDCCH and a time window, and the network device sends the PDCCH within a frequency resource range corresponding to a corresponding SSB beam index within a time window.
  • the frequency resource range corresponding to SSB beam 1 is pre-configured or agreed in the agreement, and the frequency resource range corresponding to SSB beam n is determined according to the frequency resource range and frequency hopping interval corresponding to SSB beam n-1, n ⁇ 2, and n is an integer.
  • the frequency resource range corresponding to the SSB beam index is pre-configured or agreed upon in a protocol.
  • the first corresponding relationship is pre-configured or agreed in an agreement.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • terminal device 600 may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 600 are respectively for realizing the method shown in FIG. 5 .
  • the corresponding process of the terminal device in 300 is not repeated here for brevity.
  • FIG. 11 shows a schematic block diagram of a network device 700 according to an embodiment of the present application.
  • the network device 700 includes:
  • the communication unit 710 is configured to send the physical downlink control information PDCCH for indicating the transmission of the system information block SIB1 in a frequency hopping manner.
  • the frequency hopping manner includes:
  • the PDCCHs in different SSB beam directions are sent at different frequency resource positions.
  • the PDCCH used to instruct the SIB1 to transmit is frequency hopping within the frequency range corresponding to the control resource set CORESET#0.
  • the PDCCH used to indicate the transmission of the SIB1 is transmitted in the frequency range corresponding to CORESET#0, and the CORESET#0 corresponds to different frequency ranges in different time periods.
  • the frequency hopping manner is pre-configured or agreed in a protocol
  • the frequency hopping interval is pre-configured or agreed in a protocol
  • the communication unit 710 is specifically used for:
  • the PDCCH for indicating the transmission of SIB1 is sent in a frequency hopping manner, wherein,
  • the first correspondence is a correspondence between an SSB beam index corresponding to the sending PDCCH and a time window, and the network device sends the PDCCH within a frequency resource range corresponding to a corresponding SSB beam index within a time window.
  • the frequency resource range corresponding to SSB beam 1 is pre-configured or agreed in the agreement, and the frequency resource range corresponding to SSB beam n is determined according to the frequency resource range and frequency hopping interval corresponding to SSB beam n-1, n ⁇ 2, and n is an integer.
  • the frequency resource range corresponding to the SSB beam index is pre-configured or agreed upon in a protocol.
  • the first corresponding relationship is pre-configured or agreed in an agreement.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the network device 700 may correspond to the network device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 700 are respectively for realizing the method shown in FIG. 5 .
  • the corresponding process of the network device in 300 is not repeated here for brevity.
  • FIG. 12 is a schematic structural diagram of a communication device 800 provided by an embodiment of the present application.
  • the communication device 800 shown in FIG. 12 includes a processor 810, and the processor 810 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the communication device 800 may further include a memory 820 .
  • the processor 810 may call and run a computer program from the memory 820 to implement the methods in the embodiments of the present application.
  • the memory 820 may be a separate device independent of the processor 810 , or may be integrated in the processor 810 .
  • the communication device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 to communicate with other devices, specifically, may send information or data to other devices, or receive other Information or data sent by a device.
  • the transceiver 830 may include a transmitter and a receiver.
  • the transceiver 830 may further include antennas, and the number of the antennas may be one or more.
  • the communication device 800 may specifically be the network device in this embodiment of the present application, and the communication device 800 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For brevity, details are not repeated here. .
  • the communication device 800 may specifically be the mobile terminal/terminal device in the embodiments of the present application, and the communication device 800 may implement the corresponding processes implemented by the mobile terminal/terminal device in each method in the embodiments of the present application. , and will not be repeated here.
  • FIG. 13 is a schematic structural diagram of an apparatus according to an embodiment of the present application.
  • the apparatus 900 shown in FIG. 13 includes a processor 910, and the processor 910 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the apparatus 900 may further include a memory 920 .
  • the processor 910 may call and run a computer program from the memory 920 to implement the methods in the embodiments of the present application.
  • the memory 920 may be a separate device independent of the processor 910 , or may be integrated in the processor 910 .
  • the apparatus 900 may further include an input interface 930 .
  • the processor 910 may control the input interface 930 to communicate with other devices or chips, and specifically, may acquire information or data sent by other devices or chips.
  • the apparatus 900 may further include an output interface 940 .
  • the processor 910 may control the output interface 940 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.
  • the apparatus can be applied to the network equipment in the embodiments of the present application, and the apparatus can implement the corresponding processes implemented by the network equipment in the various methods of the embodiments of the present application, which are not repeated here for brevity.
  • the apparatus can be applied to the mobile terminal/terminal equipment in the embodiments of the present application, and the apparatus can implement the corresponding processes implemented by the mobile terminal/terminal equipment in each method of the embodiments of the present application.
  • the apparatus can implement the corresponding processes implemented by the mobile terminal/terminal equipment in each method of the embodiments of the present application.
  • the apparatus can implement the corresponding processes implemented by the mobile terminal/terminal equipment in each method of the embodiments of the present application.
  • the device mentioned in the embodiment of the present application may also be a chip.
  • it can be a system-on-chip, a system-on-a-chip, a system-on-a-chip, or a system-on-a-chip.
  • FIG. 14 is a schematic block diagram of a communication system 1000 provided by an embodiment of the present application. As shown in FIG. 14 , the communication system 1000 includes a terminal device 1010 and a network device 1020 .
  • the terminal device 1010 can be used to implement the corresponding functions implemented by the terminal device in the above method
  • the network device 1020 can be used to implement the corresponding functions implemented by the network device in the above method. For brevity, details are not repeated here. .
  • the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be Random Access Memory (RAM), which acts as an external cache.
  • RAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.
  • Embodiments of the present application further provide a computer-readable storage medium for storing a computer program.
  • the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application.
  • the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application.
  • the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. , and are not repeated here for brevity.
  • Embodiments of the present application also provide a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. Repeat.
  • the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, For brevity, details are not repeated here.
  • the embodiments of the present application also provide a computer program.
  • the computer program can be applied to the network device in the embodiments of the present application.
  • the computer program When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity. , and will not be repeated here.
  • the computer program may be applied to the mobile terminal/terminal device in the embodiments of the present application, and when the computer program is run on the computer, the mobile terminal/terminal device implements the various methods of the computer program in the embodiments of the present application.
  • the corresponding process for the sake of brevity, will not be repeated here.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

Des modes de réalisation de la présente demande concernent un procédé de communication sans fil, un dispositif de terminal et un dispositif de réseau. Dans un scénario de déploiement de réutilisation de fréquence pour des faisceaux de satellite adjacents dans un réseau NTN, pour la transmission de MIB et de SIB, des mêmes interférences de fréquences entre différents blocs SSB peuvent être efficacement réduites en introduisant une transmission par saut de fréquence de bloc SSB, de sorte qu'une performance d'accès initiale d'un dispositif de terminal est améliorée. Le procédé de communication sans fil comprend : la recherche, par un dispositif de terminal, d'un bloc SSB à des positions de fréquence correspondant à de multiples trames de synchronisation, les multiples trames de synchronisation correspondant respectivement à une transmission de bloc SSB par différents faisceaux de satellite, ou les multiples trames de synchronisation correspondant respectivement à différents faisceaux de satellite.
PCT/CN2020/105879 2020-07-30 2020-07-30 Procédé de communication sans fil, dispositif de terminal et dispositif de réseau WO2022021225A1 (fr)

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