WO2023028969A1 - Procédé de communication et terminal - Google Patents

Procédé de communication et terminal Download PDF

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Publication number
WO2023028969A1
WO2023028969A1 PCT/CN2021/116329 CN2021116329W WO2023028969A1 WO 2023028969 A1 WO2023028969 A1 WO 2023028969A1 CN 2021116329 W CN2021116329 W CN 2021116329W WO 2023028969 A1 WO2023028969 A1 WO 2023028969A1
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WO
WIPO (PCT)
Prior art keywords
terminal
tci state
configuration information
sidelink
indication information
Prior art date
Application number
PCT/CN2021/116329
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English (en)
Chinese (zh)
Inventor
赵振山
史志华
丁伊
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.)
Filing date
Publication date
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 PCT/CN2021/116329 priority Critical patent/WO2023028969A1/fr
Priority to CN202180099336.6A priority patent/CN117480834A/zh
Publication of WO2023028969A1 publication Critical patent/WO2023028969A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present application relates to the field of communication technologies, and more specifically, to a communication method and a terminal.
  • the sending and receiving beams used for the subsequent sidelink transmission can be selected through processes such as beam selection and beam measurement between the sending terminal (also called the first terminal) and the receiving terminal (also called the second terminal).
  • the first terminal selects the transmit beam based on the beam measurement result fed back by the second terminal
  • the second terminal cannot select a suitable receive beam to receive the sidelink data because it cannot know the selection result of the first terminal, resulting in The quality of communication on the sidelink is degraded.
  • the present application provides a communication method and a terminal, so as to improve the communication quality of the sidelink.
  • a communication method including: a first terminal generates indication information; the first terminal sends the indication information to the second terminal, wherein the indication information is used to indicate a first transmission configuration Indicating the TCI state, or, the indication information is used to instruct the second terminal to use the first spatial receiving filter to receive sidelink data, and the first spatial receiving filter receives the first sidelink reference for the second terminal
  • the target spatial domain receiving filter used by the signal, or the indication information is used to instruct the first terminal to use the first spatial domain transmission filter to send sidelink data, and the first spatial domain transmission filter is for the first terminal to transmit the second
  • the target airspace transmit filter used by the sideline reference signal, or the indication information is used to instruct the second terminal to receive sideline data using the first airspace reception parameter, the first airspace reception parameter is the same as that of the second terminal
  • the receiving parameter of the target airspace used for receiving the first sidelink reference signal is the same, or the indication information is used to instruct the first terminal to send the sidelink data using the first airspace transmission parameter, and the first
  • a communication method including: a second terminal receiving indication information sent by a first terminal; the second terminal receiving sidelink data sent by the first terminal based on the indication information, wherein the The indication information is used to indicate that the first transmission configuration indicates the TCI state, or, the indication information is used to indicate that the second terminal uses the first spatial domain reception filter to receive the sidelink data, and the first spatial domain reception filter
  • the target spatial domain reception filter used by the second terminal to receive the first sidelink reference signal, or the indication information is used to instruct the first terminal to use the first spatial domain transmission filter to send the sidelink data
  • the The first spatial domain transmission filter is the target spatial domain transmission filter used by the first terminal to transmit the first lateral reference signal, or the indication information is used to instruct the second terminal to use the first spatial domain reception parameter to receive the lateral row data
  • the first airspace receiving parameter is the same as the target airspace receiving parameter used by the second terminal to receive the first sidelink reference signal, or the indication information is used to instruct the first terminal to use the first airspace sending parameter Sending
  • a first terminal including: a generating unit, configured to generate indication information; a sending unit, configured to send the indication information to the second terminal, wherein the indication information is used to indicate the first
  • the transmission configuration indicates the TCI status, or, the indication information is used to instruct the second terminal to use a first airspace reception filter to receive side line data, and the first airspace reception filter is for the second terminal to receive the first side line data
  • the target spatial receiving filter used by the row reference signal, or the indication information is used to instruct the first terminal to use a first spatial transmitting filter to transmit side row data, and the first spatial transmitting filter is the first terminal
  • the target airspace transmit filter used for sending the first sidelink reference signal, or the indication information is used to instruct the second terminal to receive sidelink data using a first spacespace reception parameter, the first spacespace reception parameter is the same as the first spacespace reception parameter
  • the target airspace reception parameters used by the two terminals to receive the first sidelink reference signal are the same, or the indication information is used to instruct the first terminal to use the first air
  • a second terminal including: a receiving unit configured to receive indication information sent by the first terminal; a sending unit configured to receive sidelink data sent by the first terminal based on the indication information, wherein , the indication information is used to indicate that the first transmission configuration indicates the TCI state, or the indication information is used to indicate that the second terminal uses a first airspace receiving filter to receive the sidelink data, and the first airspace receiving filter
  • the device is the target spatial receiving filter used by the second terminal to receive the first sidelink reference signal, or the indication information is used to instruct the first terminal to use the first spatial transmitting filter to send the sidelink data, so
  • the first spatial domain transmission filter is the target spatial domain transmission filter used by the first terminal to transmit the first sidelink reference signal, or the indication information is used to instruct the second terminal to use the first spatial domain reception parameter to receive the Sidelink data
  • the first airspace receiving parameter is the same as the target airspace receiving parameter used by the second terminal to receive the first sidelink reference signal, or the indication information is used to instruct the first terminal to use the first
  • a terminal including a memory and a processor, the memory is used to store a program, and the processor is used to call the program in the memory to execute the method as described in the first aspect or the second aspect .
  • an apparatus including a processor, configured to call a program from a memory to execute the method described in the first aspect or the second aspect.
  • a chip including a processor, configured to call a program from a memory, so that a device installed with the chip executes the method described in the first aspect or the second aspect.
  • a computer-readable storage medium on which a program is stored, and the program causes a computer to execute the method described in the first aspect or the second aspect.
  • a computer program product including a program, the program causes a computer to execute the method described in the first aspect or the second aspect.
  • a computer program causes a computer to execute the method described in the first aspect or the second aspect.
  • the first terminal sends indication information to the second terminal so that the second terminal can determine the receiving beam that matches the transmitting beam selected by the first terminal based on the indication information, thereby avoiding that in the traditional sidelink communication scenario, the second terminal cannot Knowing the sending beam selected by the first terminal, but not being able to select the receiving beam corresponding to the sending beam, is beneficial to improving the communication quality of the sidelink.
  • FIG. 1 is a wireless communication system 100 applied in an embodiment of the present application.
  • Fig. 2 shows the frame structure of a system frame not carrying PSFCH in NR-V2X.
  • Fig. 3 shows the frame structure of the system frame carrying PSFCH in NR-V2X.
  • Fig. 4 shows a schematic diagram of time-frequency resources occupied by SL CSI-RS.
  • FIG. 5 shows a communication process based on beam communication in a scenario where a network device communicates with a terminal.
  • FIG. 6 shows a communication process based on beam communication in a scenario where a network device communicates with a terminal.
  • FIG. 7 shows a communication process based on beam communication in the scenario of sidelink communication.
  • FIG. 8 is a flowchart of a communication method according to an embodiment of the present application.
  • FIG. 9 shows a schematic diagram of the format of configuration information 1 according to the embodiment of the present application.
  • Fig. 10 shows a schematic diagram of the format of configuration information 1 according to another embodiment of the present application.
  • Fig. 11 shows a schematic diagram of the format of configuration information 1 according to another embodiment of the present application.
  • Fig. 12 shows a schematic diagram of the format of configuration information 1 according to another embodiment of the present application.
  • Fig. 13 shows the time domain position of transmission instruction information in the embodiment of the present application.
  • FIG. 14 is a schematic diagram of the format of configuration information 2 according to the embodiment of the present application.
  • Fig. 15 is a schematic diagram of the format of configuration information 2 according to another embodiment of the present application.
  • FIG. 16 is a schematic diagram of a first terminal according to an embodiment of the present application.
  • FIG. 17 is a schematic diagram of a second terminal according to an embodiment of the present application.
  • Fig. 18 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • Fig. 1 is a wireless communication system 100 applicable to the embodiment of the present application.
  • the wireless communication system 100 may include a network device 110 and terminals 121-129.
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminals located within the coverage area.
  • sidelink sidelink
  • SL sidelink
  • Sidelink communication may also be called proximity services (Proximity services, ProSe) communication, unilateral communication, side chain communication, and device to device (D2D) communication.
  • ProSe proximity services
  • D2D device to device
  • sidelink data is transmitted between terminals through a sidelink link.
  • the sidelink data may include data and/or control signaling.
  • the sidelink data may be, for example, a physical sidelink control channel (physical sidelink control channel, PSCCH), a physical sidelink shared channel (physical sidelink control channel, PSSCH), a PSCCH demodulation reference signal (demodulation reference signal, DMRS), PSSCH DMRS, physical sidelink feedback channel (feedback channel, PSFCH), etc.;
  • the terminal in the sidelink is within the coverage of the network device, it can be divided into four scenarios.
  • scenario 1 the terminal performs sidelink communication within the coverage of the network device.
  • scenario 2 some terminals perform sidelink communication within the coverage of the network device.
  • scenario 3 the terminal performs sidelink communication outside the coverage of the network device.
  • terminals 121-122 can communicate through sidelinks, and terminals 121-122 are all within the coverage of network device 110, or in other words, terminals 121-122 are all in the same network device 110 coverage.
  • the network device 110 may send configuration signaling to the terminals 121-122, and accordingly, the terminals 121-122 communicate through the sidelink based on the configuration signaling.
  • terminals 123 - 124 can communicate through sidelinks, and terminal 123 is within the coverage of network device 110 , and terminal 124 is outside the coverage of network device 110 .
  • the terminal 123 receives the configuration information of the network device 110, and communicates through the sidelink based on the configuration of the configuration signaling.
  • the configuration information of the network device 110 cannot be received.
  • the terminal 124 can be based on the configuration information and/or Or the configuration information sent by the terminal 123 within the coverage area to acquire the configuration of the sidelink communication, so as to communicate with the terminal 123 through the sidelink based on the acquired configuration.
  • the terminal 123 may send the above configuration information to the terminal 124 through a sidelink broadcast channel (physical sidelink broadcast channel, PSBCH), so as to configure the terminal 124 to communicate through the sidelink.
  • a sidelink broadcast channel physical sidelink broadcast channel, PSBCH
  • the terminals 125 - 129 are located outside the coverage of the network device 110 and cannot communicate with the network device 110 .
  • all terminals can configure sidelink communication based on the preconfigured information.
  • the terminals 127-129 located outside the coverage of the network device may form a communication group, and the terminals 127-129 in the communication group may communicate with each other.
  • the terminal 127 in the communication group can serve as a central control node, also known as a cluster header terminal (cluster header, CH), and correspondingly, terminals in other communication groups can be called "group members".
  • the terminal 127 as a CH may have one or more of the following functions: responsible for the establishment of a communication group; joining and leaving of group members; performing resource coordination, allocating sidelink transmission resources for group members, and receiving sidelink feedback information from group members; Functions such as resource coordination with other communication groups.
  • FIG. 1 exemplarily shows a network device and multiple terminal devices.
  • the wireless communication system 100 may include multiple network devices and the coverage of each network device may include other numbers terminal device, which is not limited in the embodiment of this application.
  • the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems, for example: the fifth generation (5th generation, 5G) system or new radio (new radio, NR), long term evolution (long term evolution, LTE) system , LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), etc.
  • 5G fifth generation
  • NR new radio
  • long term evolution long term evolution
  • LTE frequency division duplex frequency division duplex
  • FDD frequency division duplex
  • TDD time division duplex
  • future communication systems such as the sixth generation mobile communication system, and satellite communication systems, etc.
  • the terminal in the embodiment of the present application may also be referred to as user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT) , a remote station, a remote terminal, a mobile device, a user terminal, a terminal device, a wireless communication device, a user agent, or a user device.
  • the terminal device in the embodiment of the present application may be a device that provides voice and/or data connectivity to users, and can be used to connect people, objects and machines, such as handheld devices with wireless connection functions, vehicle-mounted devices, and the like.
  • the terminal device in the embodiment of the present application can be mobile phone (mobile phone), tablet computer (Pad), notebook computer, palmtop computer, mobile internet device (mobile internet device, MID), wearable device, virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart Wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.
  • UE can be used to act as a base station.
  • a UE may act as a scheduling entity, which provides sidelink data between UEs in V2X or D2D, etc.
  • a cell phone and a car communicate with each other using side-by-side data. Communication between cellular phones and smart home devices without relaying communication signals through base stations.
  • the network device in this embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be called an access network device or a wireless access network device, for example, the network device may be a base station.
  • the network device in this embodiment of the present application may refer to a radio access network (radio access network, RAN) node (or device) that connects a terminal device to a wireless network.
  • radio access network radio access network, RAN node (or device) that connects a terminal device to a wireless network.
  • the base station can broadly cover various names in the following, or replace with the following names, such as: Node B (NodeB), evolved base station (evolved NodeB, eNB), next generation base station (next generation NodeB, gNB), relay station, Access point, transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), primary station MeNB, secondary station SeNB, multi-standard wireless (MSR) node, home base station, network controller, access node , wireless node, access point (access point, AP), transmission node, transceiver node, base band unit (base band unit, BBU), remote radio unit (Remote Radio Unit, RRU), active antenna unit (active antenna unit) , AAU), radio head (remote radio head, RRH), central unit (central unit, CU), distributed unit (distributed unit, DU), positioning nodes, etc.
  • NodeB Node B
  • eNB evolved base station
  • next generation NodeB next generation NodeB
  • a base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof.
  • a base station may also refer to a communication module, modem or chip configured in the aforementioned equipment or device.
  • the base station can also be a mobile switching center, a device that undertakes the function of a base station in D2D, vehicle-to-everything (V2X), machine-to-machine (M2M) communication, and a device in a 6G network.
  • V2X vehicle-to-everything
  • M2M machine-to-machine
  • Base stations can support networks of the same or different access technologies. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.
  • Base stations can be fixed or mobile.
  • a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station.
  • a helicopter or drone may be configured to serve as a device in communication with another base station.
  • the network device in this embodiment of the present application may refer to a CU or a DU, or, the network device includes a CU and a DU.
  • a gNB may also include an AAU.
  • Network equipment and terminal equipment can be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the air.
  • the scenarios where the network device and the terminal device are located are not limited.
  • Mode 1 two resource configuration modes of sidelink resources are defined, Mode 1 and Mode 2.
  • the network device schedules sidelink resources for the terminal device.
  • Mode 1 can be divided into two modes: dynamic resource allocation (dynamic resource allocation) and sidelink configured grant (SLCG).
  • DCI downlink control information
  • the network device can allocate sidelink transmission resources for the terminal by sending downlink control information (DCI).
  • DCI downlink control information
  • the terminal can use the configured sidelink resources to transmit data without resetting to the network device. Apply for sidelink resources. Therefore, the transmission delay of the sidelink can be reduced by adopting the resource configuration mode of configuring the grant.
  • Type 1 configuration authorization sidelink resource configuration is completely based on radio resource control (radio resource control, RRC) signaling.
  • Type 2 Type 2
  • the sidelink resource configuration in the communication system can be configured jointly by RRC signaling and layer 1 (layer 1, L1) signaling, where L1 signaling is used to indicate the RRC configuration Activation and deactivation.
  • the network device may schedule sidelink resources for a single transmission for the terminal. In other implementation manners, the network device may also configure semi-static sidelink resources for the terminal.
  • terminal devices 121 - 123 are located within the coverage of the network device 110 , and the network device 110 may allocate sidelink resources for the terminal devices 121 - 123 .
  • the terminal independently selects sidelink resources in the resource pool.
  • the process performed by the terminal includes a resource detection process and/or a resource selection process.
  • the terminal can identify the occupancy of sidelink resources by demodulating sidelink control information (sidelink control information, SCI).
  • the terminal can also identify the occupancy of sidelink resources by measuring the received power of the sidelink.
  • the terminal devices 124-129 are located outside the coverage of the network device 110, and the terminal devices 124-129 can autonomously select sidelink resources in the mode 2 above.
  • the communication system is required to realize the data interaction between the on-board devices. Therefore, higher requirements are put forward for the communication system. For example, the communication system is required to support higher throughput, lower delay, higher reliability, larger coverage, more flexible resource allocation, etc.
  • LTE-V2X sidelink communication between terminals only supports broadcasting.
  • NR-V2X unicast and multicast transmission methods are introduced.
  • terminal 121 and terminal 122 may communicate through unicast transmission.
  • terminal 121 sends sidelink data through a sidelink
  • terminal 122 receives the sidelink data as the only receiving device.
  • the terminals receiving side data may be all terminals in a communication group, or the terminals receiving side data may be all terminals within a certain transmission distance.
  • the terminals receiving side data may be all terminals within a certain transmission distance.
  • FIG. 1 for a communication group including terminals 127-129, when terminal 127 sends side data in a multicast manner, other terminals 128-129 in the communication group all receive the side data receiving terminal.
  • the terminals within the preset range include terminals 127-129
  • terminals 128-129 within the preset range all receive the Receiver terminal for sideline data.
  • the terminal receiving sidelink data may be any terminal around the terminal serving as the sending end.
  • terminals 121-124 and 126-129 located around terminal 125 can all serve as receivers of the sidelink data.
  • Fig. 2 shows the frame structure of a system frame not carrying PSFCH in NR-V2X.
  • Fig. 3 shows the frame structure of the system frame carrying PSFCH in NR-V2X.
  • the sidelink symbols occupied by the PSCCH start from the second sidelink symbol (for example, an orthogonal frequency division multiplexing (OFDM) symbol) of the system frame and occupy 2 or 3 side row symbols.
  • PSCCH can occupy ⁇ 10, 12 15, 20, 25 ⁇ physical resource blocks (physical resource blocks, PRB).
  • PRB physical resource blocks
  • sub-channels are the minimum granularity of PSSCH resource allocation specified in NR-V2X
  • the number of PRBs occupied by PSCCH must be less than or equal to the number of PRBs contained in a sub-channel in the resource pool, so as not to cause additional damage to PSSCH resource selection or allocation. limits.
  • the PSSCH in the time domain, also starts from the second side row symbol of the system frame and ends at the penultimate side row symbol of the system frame.
  • the PSSCH occupies K subchannels of the system frame, each subchannel includes N consecutive PRBs, and K and N are positive integers.
  • the last symbol of the system frame is a guard period (guard period, GP) symbol.
  • the first side row symbol of the system frame is the repetition of the second side row symbol, and usually the terminal can use the first side row symbol as an automatic gain control (AGC) symbol when receiving the system frame, Data on AGC symbols is not normally used for data demodulation.
  • AGC automatic gain control
  • the penultimate side symbol and the penultimate side symbol in the system frame are used for PSFCH transmission.
  • a side line symbol preceding the PSFCH side line symbol is carried in the system frame as a GP.
  • NR-V2X supports SL channel state information reference signal (channel state information reference signal, CSI-RS).
  • CSI-RS channel state information reference signal
  • the terminal device needs to send the PSSCH corresponding to the SL CSI-RS, that is, the terminal device cannot only send the SL CSI-RS.
  • Condition 2 The reporting of the sideline CSI is activated through high-layer signaling.
  • Condition 3 in the case that the high layer signaling activates the reporting of the side CSI, the corresponding bit in the second-order SCI sent by the terminal device triggers the reporting of the side CSI.
  • the maximum number of ports supported by SL CSI-RS is 2.
  • SL CSI-RS of different ports are multiplexed by code division on two adjacent REs of the same side row symbol.
  • Each The number of SL CSI-RS of the port is 1, that is, the density is 1. Therefore, the SL CSI-RS can only appear on one side symbol at most in a PRB, and the specific position of this side symbol is determined by the terminal device sending the SL CSI-RS.
  • SL CSI-RS cannot be located in the same sidelink symbol as PSCCH and second-order SCI.
  • the SL CSI-RS of two ports will occupy two consecutive resource elements (resource elements, REs) in the frequency domain, so the SL CSI-RS It also cannot be sent through the same sidelink symbol as the DMRS of the PSSCH.
  • the position of the side row symbol occupied by the SL CSI-RS may be indicated by the sl-CSI-RS-FirstSymbol parameter in PC5RRC.
  • the position of the first RE occupied by the SL CSI-RS in a PRB is indicated by the "sl-CSI-RS-FreqAllocation" parameter in PC5RRC. If the SL CSI-RS corresponds to one port, this parameter is a bitmap with a length of 12, corresponding to 12 REs in one PRB. If the SL CSI-RS corresponds to two ports, this parameter is a bitmap with a length of 6. In this case, the SL CSI-RS occupies two REs of 2f(1) and 2f(1)+1, where f(1 ) represents the identification of the bit whose value is 1 in the above bitmap.
  • the frequency domain position occupied by the SL CSI-RS is also determined by the terminal device sending the SL CSI-RS, and it should be noted that the determined frequency domain position of the SL CSI-RS cannot conflict with the frequency domain position occupied by the PT-RS.
  • Fig. 4 shows a schematic diagram of time-frequency resources occupied by SL CSI-RS.
  • sl-CSI-RS-FirstSymbol indicates that the position of the side row symbol occupied by the SL CSI-RS is 8
  • sl-CSI-RS-FreqAllocation indicates that the SL CSI-RS is in the
  • Design goals of a communication system include large-bandwidth communication in a high-frequency band (eg, a frequency band above 6 GHz).
  • a high-frequency band eg, a frequency band above 6 GHz.
  • an effective technical solution is based on a large-scale antenna array (Massive multiple-in multipleout, Massive MIMO) to form a shaped beam with greater gain and overcome propagation loss. , to ensure the coverage of the communication system.
  • Massive MIMO Massive MIMO
  • the common large-scale antenna array is the millimeter-wave antenna array. Since the wavelength emitted by the millimeter-wave antenna array is relatively short, the distance between the antenna elements of the antenna array can be shorter, and the aperture of the antenna elements can be smaller, so that more The physical antenna elements of can be integrated in a finite-sized two-dimensional antenna array.
  • the communication process based on the beam communication is introduced below in combination with FIG. 5 to FIG. 6 by taking the scenario of communication between a network device and a terminal as an example.
  • a wider beam (beam) 510 is usually used to cover the entire cell (or "sector").
  • the terminals for example, terminals 511-515
  • the network equipment can communicate with the network equipment through this wider beam, for example, obtain the transmission resources allocated by the network equipment.
  • a multi-beam (Multi-beam) system 610 can be used to cover the entire cell, that is, each beam (eg, beam 611-614) respectively cover a small range in the cell, and achieve the effect of multiple beams covering the entire cell by means of beam sweeping.
  • the communication system may use beam 611 to cover the area where terminal 1 is located.
  • the communication system may use the beam 612 to cover the area where the terminal 2 is located.
  • the communication system may cover the area where terminal 3 and terminal 4 are located through beam 613 .
  • the communication system may use the beam 614 to cover the area where the terminal 5 is located.
  • the transmitted energy can be more concentrated and thus cover longer distances. But precisely because the beams are narrow, each beam can only cover part of the area in the cell, so the multi-beam system can be understood as "trading time for space”.
  • the beam used by the transmitting end to transmit a signal is called a "transmitting beam”.
  • a beam used by a receiving end to receive a signal is called a "reception beam”.
  • the above-mentioned transmitting beam may also be called a spatial domain transmission filter (spatial domain transmission filter), and correspondingly, the above-mentioned receiving beam may also be called a spatial domain reception filter (spatial domain reception filter).
  • the above-mentioned transmitting beam may also be called a spatial domain transmission parameter (spatial domain transmission parameter), and correspondingly, the above-mentioned receiving beam may also be called a spatial domain reception parameter (spatial domain reception parameter).
  • the embodiments of the present application mainly use beams as an example for introduction.
  • both the network device and the terminal need to select the appropriate transmission beam and beam through processes such as beam selection and beam measurement.
  • receive beam For example, in the process of selecting the transmission beam, the network device may use different transmission beams to transmit multiple reference signals in turn, and the resources corresponding to the multiple reference signals are different.
  • the terminal also uses multiple receiving beams to respectively receive the above multiple reference signals, and measure the detected reference signals to obtain measurement results.
  • the terminal selects part of the reference signals from the detected multiple reference signals, and feeds back the resource identifiers of the above part of the reference signals and their corresponding measurement results to the network device, so that the network device selects an appropriate transmission beam as a subsequent communication with the terminal. the transmit beam.
  • the terminal needs to select a reception beam matching the transmission beam to communicate with the network device.
  • the communication protocol stipulates that the transmission beam selected by the network device may be indicated by quasi co-located (quasi co-colated, QCL) information in a transmission configuration indicator (transmission configuration indicator, TCI) state.
  • antenna ports are used to represent wireless channel states, so the channel states experienced by signals on different antenna ports are naturally different, but even so, the channels of different antenna ports may still have some common properties, these properties Can be called large-scale channel property (large-scale channel property).
  • large-scale channel property large-scale channel property
  • two different signals are transmitted from two antenna ports that are very close to each other. Due to fading, they may experience different side channel conditions, but the large-scale parameters of the two channels may be the same. In this case, although the two signals correspond to different antenna ports, they are quasi-co-located.
  • the above-mentioned large-scale channel attributes include: Doppler shift, Doppler spread, average delay, delay spread, and spatial RX parameter .
  • the airspace reception parameters correspond to a series of airspace reception attributes, mainly used in frequency bands above 6GHz, because NR frequency bands above 6GHz use digital-analog hybrid beamforming, and the direction and width of the analog beam will affect the large-scale characteristics of the channel, so this parameter is introduced It is used to characterize the influence of the beam on the channel characteristics. If the spatial reception parameters of the two reference signals are quasi-co-located, they are sent by the network device through the same transmit beam, which means that the terminal can receive the two reference signals with the same receive beam.
  • the terminal may use the characteristics of the transmission environment corresponding to the signal transmission to improve the receiving algorithm.
  • the statistical properties of the channel can be used to optimize the design and parameters of the channel estimator.
  • these characteristics corresponding to signal transmission can be represented by QCL information (QCL-Info) in the TCI state.
  • the network device transmits the signal, it will indicate the corresponding QCL status information to the terminal through the TCI status .
  • the TCI state may contain an identification (ID) of the TCI state and/or QCL information.
  • ID an identification
  • QCL information may further include QCL type configuration and QCL reference signal configuration.
  • the above QCL type configuration may include QCL type A, QCL type B, QCL type C or QCL type D.
  • QCL type configurations are as follows.
  • QCL Type A (QCL-TypeA): ⁇ Doppler Shift, Doppler Spread, Average Delay, Delay Spread ⁇
  • QCL Type B (QCL-TypeB): ⁇ Doppler Shift, Doppler Spread ⁇
  • QCL Type C (QCL-TypeC): ⁇ Doppler shift, average delay ⁇
  • QCL Type D (QCL-TypeD): ⁇ airspace receiving parameters ⁇ .
  • the above QCL reference signal configuration may include the identification of the bandwidth part (bandwidth part, BWP) where the reference signal is located and the identification of the reference signal, wherein the identification of the reference signal may be a synchronization signal and a physical broadcast channel block (synchronization signal and physical broadcast channel block , SSB) index and/or resource identification of CSI-RS.
  • BWP bandwidth part
  • SSB physical broadcast channel block
  • the communication protocol stipulates that the pseudo code of the above TCI state may be as follows.
  • the network device can indicate the transmit beam to the terminal by indicating the TCI status. If the identifier of the reference signal that is quasi-co-located with the signal to be transmitted is set to 1 through the TCI state configuration of the network device, and the QCL type is type A, type B or type C, the terminal can assume that the signal to be transmitted and the reference signal with the identifier of 1 have the same large-scale channel parameters, and the large-scale channel parameters can be determined by the QCL type in the TCI state.
  • the receiving beam used by the terminal to receive the signal to be transmitted is the same as the reference signal whose identifier is 1.
  • the receive beams are the same.
  • the multi-beam system in the sidelink communication scenario, that is to say, the above multi-beam system can also be applied to the sending terminal and/or in the receiving terminal.
  • the following will introduce the beam selection process in the sidelink communication scenario.
  • the terminal serving as the sending end (also called the first terminal) and/or the terminal serving as the receiving end (also called the second terminal) in the sidelink communication can support multi-beam transmission, then, before the first terminal sends the sidelink data, Both the first terminal and the second terminal need to select a suitable sending beam and receiving beam through processes such as beam selection and beam measurement.
  • the beam selection process in the scenario where the first terminal supports multi-beam transmission and the second terminal uses the same beam for transmission is introduced below with reference to FIG. 7 .
  • the first terminal supports 4 transmission beams 0-3.
  • the first terminal uses different transmitting beams 0-3 to transmit multiple sidelink reference signals in turn, and identifiers of the multiple sidelink reference signals (for example, resource identifiers of the sidelink reference signals) are different.
  • the second terminal uses the same receiving beam to receive multiple side-going reference signals sent by sending beams 0-3, and measures the detected side-going reference signals to obtain a measurement result.
  • the second terminal selects N from the detected side-going reference signals, and feeds back the identifiers of the N side-going reference signals and their corresponding measurement results to the first terminal, so that the first terminal selects an appropriate transmission beam as The transmit beam for subsequent transmission sideline data.
  • the first terminal selects the beam corresponding to the sidelink reference signal with the best measurement result as the sending beam.
  • the second terminal may also support multi-beam transmission, assuming that the second terminal supports four receiving beams 0-3. At this time, the second terminal also needs to use each receiving beam in turn to respectively receive the sidelink reference signal sent by the first terminal. Assume that the first terminal supports 4 transmit beams 0-3, and the second terminal supports 4 receive beams 0-3. In the process of transmitting beam selection, the first terminal uses different transmitting beams 0 to 3 to transmit multiple sidelink reference signals in turn, and the identifiers of the multiple sidelink reference signals are different. Correspondingly, the second terminal uses receiving beams 0 to 3 to respectively receive multiple side-going reference signals sent by sending beams 0-3, and measures the detected side-going reference signals to obtain measurement results.
  • the second terminal may first use receiving beam 0 to receive multiple sidelink reference signals sent through transmitting beams 0-3, and then, the second terminal may use receiving beam 1 to receive multiple sidelink reference signals transmitted through transmitting beam 0 The multiple side-going reference signals transmitted by ⁇ 3, and then, the second terminal can use receiving beam 2 to receive multiple side-going reference signals transmitted by transmitting beams 0-3, and finally, the second terminal can use receiving beam 3 again Multiple sidelink reference signals transmitted by transmit beams 0-3 are received.
  • the second terminal may select N from the detected sidelink reference signals based on the measurement results, and feed back the identities of the N sidelink reference signals and their corresponding measurement results to the first The terminal, so that the first terminal selects an appropriate transmission beam as a transmission beam for subsequent transmission of sidelink data. For example, the first terminal selects the beam corresponding to the sidelink reference signal with the best measurement result as the sending beam.
  • the above-mentioned side-going reference signal may be a reference signal for beam selection and beam measurement.
  • the above-mentioned sidelink reference signal may be one or more of CSI-RS, PSCCH DMRS, PSSCH DMRS, and phase tracking reference signal (phase tracking reference signal, PT-RS).
  • the second terminal cannot know the selection result of the first terminal, it cannot select the receive beam that matches the above transmit beam as the transmit beam. Receive beams for subsequent sidelink data, resulting in degraded sidelink communication quality.
  • the embodiment of the present application provides a communication method to indicate to the second terminal the receiving beam used when receiving sidelink data by sending indication information to the second terminal, so as to improve communication between the first terminal and the second terminal. Communication quality of the sidelink.
  • the flow of the communication method in the embodiment of the present application will be introduced below with reference to FIG. 8 .
  • the communication method shown in FIG. 8 includes step S810 and step S820.
  • step S810 the first terminal generates indication information.
  • step S820 the first terminal sends indication information to the second terminal.
  • the description of the functions of the above indication information may be different, and the functions of the above indication information are respectively introduced from six aspects below.
  • the above indication information is used to indicate the first TCI state.
  • the first TCI state is used to indicate the receiving beam used by the second terminal to receive the sidelink data.
  • the first TCI state is used to indicate the sending beam used by the first terminal to send the sidelink data, and accordingly, the second terminal may determine the receiving beam for receiving the sidelink data based on the sending beam.
  • the transmitting beam and/or receiving beam indicated by the first TCI state may be selected through the beam selection process introduced above.
  • the foregoing sending beam and/or receiving beam may also be selected by using other beam selection methods, which are not limited in this embodiment of the present application.
  • the transmission beam indicated by the first TCI state may be an optimal transmission beam selected through a beam selection process, or may be a better transmission beam selected through a beam selection process.
  • the better sending beam can be understood as that the measurement result of the side-going reference signal sent by the sending beam is higher than the preset threshold.
  • the preset threshold may be, for example, preset receiving power, preset signal energy, and the like.
  • the optimal transmission beam can be understood as that the measurement result of the side-going reference signal transmitted through the transmission beam is better than the measurement result corresponding to the side-going reference signal transmitted through other beams during the beam selection process.
  • the receiving beam indicated by the first TCI state may be an optimal receiving beam selected through a beam selection process, or may be a better receiving beam selected through a beam selection process.
  • the better receiving beam can be understood as the measurement result of the side-going reference signal received by the receiving beam is higher than the preset threshold.
  • the preset threshold may be, for example, preset receiving power, preset signal energy, and the like.
  • the optimal receiving beam can be understood as that the measurement result of the side-going reference signal transmitted through the receiving beam is better than the corresponding measurement result of the side-going reference signal received through other beams during the beam selection process.
  • the aforementioned transmit beams may be replaced with spatial domain transmit filters
  • the aforementioned receive beams may be replaced with spatial domain receive filters. That is, the above-mentioned first TCI state is used to indicate the spatial domain reception filter used by the second terminal to receive sideline data. Alternatively, the first TCI state is used to indicate the spatial domain transmit filter used by the first terminal to transmit the sidelink data, and accordingly, the second terminal may determine the spatial domain receive filter for receiving the sidelink data based on the spatial domain transmit filter.
  • the above-mentioned sending beam may be replaced by an airspace sending parameter
  • the above-mentioned receiving beam may be replaced by an airspace receiving parameter. That is, the above-mentioned first TCI state is used to indicate the airspace receiving parameters used by the second terminal to receive sidelink data. Alternatively, the first TCI state is used to indicate airspace transmission parameters used by the first terminal to send sidelink data, and accordingly, the second terminal may determine airspace reception parameters for receiving sidelink data based on the airspace transmission parameters.
  • the above-mentioned first TCI state may include an identifier of a sidelink reference signal and/or QCL information (QCL-Info).
  • the QCL information may be a QCL type (qcl-Type).
  • the QCL types include QCL type A, QCL type B, QCL type C and QCL type D.
  • the first TCI state can be used to indicate the receiving beam used by the second terminal to receive sideline data, or in other words, the first TCI state can be used to indicate the transmission beam used by the first terminal to send sideline data. beam.
  • the identifier of the side reference signal may be a resource identifier (SL-RS-ResourceId) of the side reference signal, or an index of the side reference signal.
  • the first TCI state is used to indicate the sending beam of the sidelink reference signal contained in the first TCI state, which is the same as the sending beam used for subsequent transmission of sidelink data.
  • the first TCI state is used to indicate that the receiving beam of the sidelink reference signal included in the first TCI state is the same as the receiving beam of subsequent sidelink data.
  • the first TCI state is used to instruct the second terminal to receive the sidelink data sent by the first terminal by using the same receiving beam as that for receiving the sidelink reference signal included in the first TCI state.
  • the sidelink reference signal contained in the above-mentioned first TCI state may be the sidelink reference signal introduced in the multi-beam system in the sidelink scenario described above, and for the sake of brevity, details are not repeated here.
  • the first TCI state may further include a TCI state identifier (TCI-StateId), where the TCI state identifier is used to identify the TCI state.
  • TCI-StateId TCI state identifier
  • the TCI states configured on different sideline BWPs may also be different. Therefore, the above-mentioned first TCI state may also indicate the BWP associated with the first TCI state
  • the first TCI state may include the BWP identifier (bwp-Id), and the BWP identifier indicates the side BWP associated with the first TCI state.
  • the TCI states configured on different sidelink carriers may also be different. Therefore, the above-mentioned first TCI state may also indicate the side with which the first TCI state is associated.
  • the upstream carrier for example, includes an identifier (carrier-ID) of the sidelink carrier, and the sidelink carrier corresponding to the first TCI state is indicated by the identifier of the sidelink carrier.
  • the pseudo code corresponding to the above first TCI state may be as follows.
  • the pseudo code corresponding to the above QCL information may be as follows.
  • the above instruction information is used to instruct the second terminal to use the first airspace receiving filter to receive the sidelink data.
  • the first spatial domain receiving filter is a target spatial domain receiving filter used by the second terminal to receive the first sidelink reference signal.
  • the above-mentioned first sidelink reference signal may be the sidelink reference signal introduced above when introducing the multi-beam system in the sidelink communication scenario, and for the sake of brevity, details are not repeated here.
  • the above-mentioned target spatial receiving filter (also called “target receiving beam”) may be selected through the receiving beam selection process described above. For example, based on the receiving beam selection process introduced above, the target spatial receiving filter may be selected by the second terminal from multiple spatial receiving filters supported by the second terminal based on the measurement results. Certainly, the foregoing target spatial domain receiving filter may also be selected in other manners, which is not limited in this embodiment of the present application.
  • the above-mentioned target spatial domain reception filter may be the selected optimal spatial domain reception filter, or may be the selected better spatial domain reception filter.
  • the better spatial domain reception filter can be understood as the measurement result of the side reference signal received by the spatial domain reception filter is higher than a preset threshold.
  • the preset threshold may be, for example, preset receiving power, preset signal energy, and the like.
  • the optimal spatial reception filter can be understood as the measurement result of the side reference signal received by the spatial reception filter is better than the corresponding measurement result of the side reference signal received by other spatial reception filters supported by the second terminal.
  • the foregoing target spatial reception filter may be a spatial reception filter used by the sidelink reference signal corresponding to resource 1 for receiving the sidelink reference signal by the second terminal.
  • the first terminal determines resource 2 of the sidelink reference signal and the resource 2 of the sidelink reference signal based on the measurement results.
  • the measurement result of resource 3 is better, but the measurement results of resource 2 of the side reference signal and resource 3 of the side reference signal are worse than the measurement results of resource 1 of the side reference signal, but for some reasons,
  • the first terminal does not use the spatial domain transmit filter corresponding to resource 1 of the sidelink reference signal, and correspondingly, the second terminal cannot use the spatial domain receive filter corresponding to resource 1 of the sidelink reference signal.
  • the first terminal may arbitrarily select a spatial domain transmission filter from the spatial domain transmission filters corresponding to resource 2 of the sidelink reference signal and resource 3 of the sidelink reference signal. Assume that the first terminal selects the spatial domain transmit filter corresponding to the sidelink reference signal resource 2, and indicates the selection result to the second terminal through the TCI state. Correspondingly, according to the TCI state, the second terminal uses the airspace receiving filter corresponding to the sidelink reference signal resource 2 to receive the sidelink data, that is to say, the airspace receiving filter corresponding to the sidelink reference signal resource 2 is the above-mentioned target airspace receive filter.
  • some of the above reasons may include a change in the transmission condition of the sidelink data, resulting in the unavailability of the spatial domain transmit filter corresponding to resource 1 of the sidelink reference signal.
  • some of the above reasons may also include that the first terminal can transmit sidelink data to the second terminal and other terminals at the same time through other airspace transmit filters, resulting in the first terminal not using the airspace transmit filter corresponding to resource 1 of the sidelink reference signal device.
  • the sidelink reference signal resources fed back by the second terminal to the first terminal include sidelink reference signal resource 1 and sidelink reference signal resource 2
  • the sidelink reference signal resources fed back by the third terminal to the first terminal include sidelink reference signal resources resource 2 and sidelink reference signal resource 3, and the first terminal needs to send sidelink data (for example, sidelink feedback information) to the second terminal and the third terminal at the same time in a certain time slot, at this time, in order to simultaneously send the second terminal
  • the first terminal may select the spatial domain transmission filter corresponding to the reference signal resource 2 for transmission.
  • the above indication information is used to instruct the first terminal to use the first spatial domain transmission filter to transmit the sidelink data
  • the first spatial domain transmission filter is a target spatial domain transmission filter used by the first terminal to transmit the first sidelink reference signal.
  • the above-mentioned first sidelink reference signal may be the sidelink reference signal introduced above when introducing the multi-beam system in the sidelink communication scenario, and for the sake of brevity, details are not repeated here.
  • the aforementioned target spatial domain transmit filter (also known as “target transmit beam”) may be selected through the beam selection process described above.
  • the above-mentioned target airspace transmission filter may also be selected by the first terminal based on the measurement result fed back by the second terminal.
  • the foregoing target airspace transmission filter may also be selected in other manners, which is not limited in this embodiment of the present application.
  • the above-mentioned target spatial domain transmission filter may be the selected optimal spatial domain transmission filter, or may be the selected better spatial domain transmission filter.
  • the better spatial domain transmission filter can be understood as that the measurement result of the side reference signal transmitted through the spatial domain transmission filter is higher than the preset threshold.
  • the preset threshold may be, for example, preset transmit power, preset signal energy, and the like.
  • the optimal spatial transmission filter can be understood as that the measurement result of the side reference signal transmitted through the spatial transmission filter is better than the measurement result corresponding to the side reference signal transmitted through other spatial transmission filters supported by the first terminal.
  • the target spatial domain transmission filter may be a spatial domain transmission filter used by the sidelink reference signal corresponding to resource 1 for transmitting the sidelink reference signal by the second terminal.
  • the first terminal determines resource 2 of the sidelink reference signal and resource 3 of the sidelink reference signal based on the measurement results
  • the measurement results of the sidelink reference signal are better, but the measurement results of the sidelink reference signal resource 2 and the sidelink reference signal resource 3 are worse than the measurement results of the sidelink reference signal resource 1, but for some reasons, the first The terminal does not use the spatial domain transmit filter corresponding to resource 1 of the sidelink reference signal.
  • the first terminal can arbitrarily select from the spatial domain transmit filter corresponding to resource 2 of the sidelink reference signal and resource 3 of the sidelink reference signal.
  • a spatial domain transmit filter serves as the above-mentioned target spatial domain transmit filter.
  • some of the above reasons may include a change in the transmission condition of the sidelink data, resulting in the unavailability of the spatial domain transmit filter corresponding to resource 1 of the sidelink reference signal.
  • some of the above reasons may also include that the first terminal can transmit sidelink data to the second terminal and other terminals at the same time through other airspace transmit filters, resulting in the first terminal not using the airspace transmit filter corresponding to resource 1 of the sidelink reference signal device.
  • the sidelink reference signal resources fed back by the second terminal to the first terminal include sidelink reference signal resource 1 and sidelink reference signal resource 2
  • the sidelink reference signal resources fed back by the third terminal to the first terminal include sidelink reference signal resources resource 2 and sidelink reference signal resource 3, and the first terminal needs to send sidelink data (for example, sidelink feedback information) to the second terminal and the third terminal at the same time in a certain time slot, at this time, in order to simultaneously send the second terminal
  • the first terminal may select the spatial domain transmission filter corresponding to the reference signal resource 2 for transmission.
  • the above indication information is used to instruct the second terminal to use the first airspace receiving parameter to receive the sidelink data, and the first airspace receiving parameter is the same as the target airspace receiving parameter used by the second terminal to receive the first sidelink reference signal.
  • the above-mentioned first sidelink reference signal may be the sidelink reference signal introduced above when introducing the multi-beam system in the sidelink communication scenario, and for the sake of brevity, details are not repeated here.
  • the above-mentioned receiving parameters in the target airspace may be selected through the beam selection process described above.
  • the target airspace receiving parameter may be selected by the second terminal from multiple airspace receiving parameters based on the measurement result.
  • the above-mentioned target airspace receiving parameters may also be selected in other ways, which is not limited in this embodiment of the present application.
  • the above-mentioned target airspace receiving parameter may be the selected optimal airspace receiving parameter, or may be the selected better airspace receiving parameter.
  • the better airspace reception parameter can be understood as that the measurement result of the lateral reference signal received through the airspace reception parameter is higher than a preset threshold.
  • the preset threshold may be, for example, preset receiving power, preset signal energy, and the like.
  • the optimal airspace reception parameter can be understood as that the measurement result of the lateral reference signal received by the airspace reception parameter is better than the measurement result corresponding to the lateral reference signal received by other airspace reception parameters supported by the second terminal.
  • the target airspace reception parameter may be an airspace reception parameter used by the sidelink reference signal corresponding to resource 1 for receiving the sidelink reference signal by the second terminal.
  • the second terminal feeds back the measurement results of the above N sidelink reference signal resources, and the first terminal determines resource 2 of the sidelink reference signal and resource 3 of the sidelink reference signal based on the measurement results
  • the measurement results of the sidelink reference signal are better, but the measurement results of the sidelink reference signal resource 2 and the sidelink reference signal resource 3 are worse than the measurement results of the sidelink reference signal resource 1, but for some reasons, the first The terminal does not use the airspace transmission parameters corresponding to resource 1 of the sidelink reference signal, and correspondingly, the second terminal cannot use the airspace reception parameters corresponding to resource 1 of the sidelink reference signal.
  • the first terminal may arbitrarily select one airspace transmission parameter from the airspace transmission parameters corresponding to resource 2 of the sidelink reference signal and resource 3 of the sidelink reference signal. Assume that the first terminal selects the airspace transmission parameter corresponding to the sidelink reference signal resource 2, and indicates the selection result to the second terminal through the TCI state. Correspondingly, according to the TCI state, the second terminal uses the airspace receiving parameter corresponding to the sidelink reference signal resource 2 to receive the sidelink data, that is, the airspace receiving parameter corresponding to the sidelink reference signal resource 2 is the above-mentioned target airspace receiving parameter .
  • some of the above reasons may include a change in the transmission condition of the sidelink data, resulting in unavailability of the airspace reception parameter corresponding to resource 1 of the sidelink reference signal.
  • some of the above reasons may also include that the first terminal can transmit sidelink data to the second terminal and other terminals at the same time through other airspace transmission filters, resulting in the first terminal not using the airspace transmission parameters corresponding to resource 1 of the sideline reference signal .
  • the sidelink reference signal resources fed back by the second terminal to the first terminal include sidelink reference signal resource 1 and sidelink reference signal resource 2
  • the sidelink reference signal resources fed back by the third terminal to the first terminal include sidelink reference signal resources resource 2 and sidelink reference signal resource 3, and the first terminal needs to send sidelink data (for example, sidelink feedback information) to the second terminal and the third terminal at the same time in a certain time slot, at this time, in order to simultaneously send the second terminal
  • the first terminal may select the airspace transmission parameter corresponding to the reference signal resource 2 to transmit.
  • the above instruction information is used to instruct the first terminal to use the first airspace transmission parameter to send sidelink data, and the first airspace transmission parameter is the same as the target airspace transmission parameter used by the first terminal to send the first sidelink reference signal.
  • the above-mentioned first sidelink reference signal may be the sidelink reference signal introduced above when introducing the multi-beam system in the sidelink communication scenario, and for the sake of brevity, details are not repeated here.
  • the above-mentioned target airspace transmission parameters may be selected through the beam selection process described above.
  • the target airspace transmission parameter may be selected by the second terminal from multiple airspace transmission parameters based on the measurement result.
  • the above target airspace transmission parameters may also be selected by the first terminal based on the measurement result fed back by the second terminal.
  • the above target airspace transmission parameters may also be selected in other ways, which is not limited in this embodiment of the present application.
  • the above-mentioned target airspace transmission parameters may be selected optimal airspace transmission parameters, or may be selected better airspace transmission parameters.
  • the better airspace transmission parameter can be understood as that the measurement result of the side reference signal transmitted through the airspace transmission parameter is higher than the preset threshold.
  • the preset threshold may be, for example, preset transmit power, preset signal energy, and the like.
  • the optimal airspace transmission parameter can be understood as that the measurement result of the side reference signal sent by the air space transmission parameter is better than the corresponding measurement result of the side reference signal sent by other air space transmission parameters supported by the first terminal.
  • the target airspace transmission parameter may be an airspace transmission parameter used by the sidelink reference signal corresponding to resource 1 for sending the sidelink reference signal by the second terminal.
  • the first terminal determines resource 2 of the sidelink reference signal and resource 3 of the sidelink reference signal based on the measurement results
  • the measurement results of the sidelink reference signal are better, but the measurement results of the sidelink reference signal resource 2 and the sidelink reference signal resource 3 are worse than the measurement results of the sidelink reference signal resource 1, but for some reasons, the first The terminal does not use the airspace transmission parameters corresponding to resource 1 of the sidelink reference signal.
  • the first terminal can arbitrarily select an airspace from the airspace transmission parameters corresponding to resource 2 of the sidelink reference signal and resource 3 of the sidelink reference signal.
  • the sending parameter is used as the above-mentioned target airspace sending parameter.
  • some of the above reasons may include a change in the transmission condition of the sidelink data, which causes the airspace transmission parameters corresponding to resource 1 of the sidelink reference signal to be unavailable.
  • some of the above reasons may also include that the first terminal may transmit sidelink data to the second terminal and other terminals at the same time through other airspace transmission parameters, resulting in the first terminal not using the airspace transmission parameters corresponding to resource 1 of the sidelink reference signal.
  • the sidelink reference signal resources fed back by the second terminal to the first terminal include sidelink reference signal resource 1 and sidelink reference signal resource 2
  • the sidelink reference signal resources fed back by the third terminal to the first terminal include sidelink reference signal resources resource 2 and sidelink reference signal resource 3, and the first terminal needs to send sidelink data (for example, sidelink feedback information) to the second terminal and the third terminal at the same time in a certain time slot, at this time, in order to simultaneously send the second terminal
  • the first terminal may select the airspace transmission parameter corresponding to the reference signal resource 2 to transmit.
  • the indication information is used to indicate the identity of the sidelink reference signal.
  • the identifiers of the sidelink reference signals sent by the first terminal through each transmit beam are different. Therefore, the first terminal can carry the sidelink reference signal in the indication information to indicate the receiving beam to the second terminal. Correspondingly, after receiving the identifier of the sidelink reference signal, the second terminal can use the receiving beam receiving the sidelink reference signal to receive the sidelink data sent by the first terminal.
  • the identifier of the sidelink reference signal may include a resource identifier of the sidelink reference signal, or an index of the sidelink reference signal.
  • the indication information may also carry QCL type information, such as QCL type D, so as to instruct the second terminal to use the same receiving beam (or spatial receiving parameter, or spatial receiving filter) to receive the sideline data, of course, if the second terminal is configured to obtain the QCL type information corresponding to the indication information in a pre-configured or predefined manner, the indication information may not carry the QCL type information.
  • QCL type information such as QCL type D
  • the first terminal sends indication information to the second terminal, so that the second terminal can determine the receiving beam matching the transmitting beam selected by the first terminal based on the indication information, avoiding the traditional sidelink communication scenario
  • the second terminal since the second terminal cannot know the transmission beam selected by the first terminal, it cannot select the reception beam corresponding to the transmission beam, which is beneficial to improve the communication quality of the sidelink.
  • the above indication information may be carried in SCI, MAC CE or PC5-radio resource control (radio resource control, PC5-RRC) signaling.
  • the first terminal configures only one TCI state for the second terminal each time, when the signal transmission condition changes, or the channel quality transmission changes, the receiving beam indicated by the TCI state may no longer be applicable. At this time, another round of beam selection and beam measurement is required between the first terminal and the second terminal to select an appropriate transmit beam and/or receive beam for sidelink communication, so that sidelink data cannot be transmitted immediately , leading to a large transmission delay of the sideline data.
  • the first terminal can configure TCI state set 1 through configuration information, and then indicate the first TCI state in the TCI state set 1 through indication information, wherein, in TCI state set 1 Includes multiple TCI states.
  • the first terminal can directly instruct the second terminal to select the receiving beam indicated by other TCI states in TCI state set 1 to replace the first
  • the receiving beam indicated by the TCI status avoids re-executing the process of beam selection and beam measurement, and reduces the transmission delay of sidelink data.
  • the above TCI state set 1 includes multiple TCI states. In some implementation manners, the above TCI state set 1 may include identifiers of multiple TCI states, indication information of reference signals associated with each TCI state in the multiple TCI states, and QCL type information. In some other implementation manners, the above TCI state set 1 may include resource identifiers of reference signals associated with each of the multiple TCI states, and QCL type information. In some other implementation manners, the above TCI state set 1 may include identifiers of multiple TCI states, and identifiers of reference signals associated with each TCI state in the multiple TCI states. In some other implementation manners, the above TCI state set 1 may include a resource identifier of a reference signal associated with each of the multiple TCI states. The content of the TCI state set 1 will be introduced below in conjunction with Table 1 to Table 4. For the sake of brevity, details are not repeated here.
  • the first terminal may configure the TCI state set 1 by sending the configuration information 1 to the second terminal, and indicate to the second terminal which TCI state in the TCI state set 1 to use.
  • the first terminal may send the configuration information 1 to the second terminal.
  • the above indication information is used to instruct the second terminal to use the first TCI state in the first TCI set.
  • the above indication information is used to indicate activation of the first TCI state in the first TCI set.
  • the above indication information may be an index of the first TCI state in the TCI state set 1 .
  • the indication information is an identifier of the first TCI state, which is not limited in this embodiment of the present application.
  • the above configuration information 1 is carried in PC5-RRC signaling, and the indication information is carried in SCI or MAC CE. Or the above configuration information 1 is carried in the MAC CE, and the indication information is carried in the SCI.
  • the total number M of TCI states in the TCI state set 1 can be carried in the configuration information 1.
  • the total number of TCI states in the TCI state set 1 may not be carried in the configuration information 1, which is not limited in this embodiment of the present application.
  • the configuration information 1 also includes the identifier of the sidelink carrier associated with the TCI state set 1 to indicate the carrier corresponding to the first TCI state.
  • the configuration information 1 may also include the identifier of the BWP associated with the TCI state set 1 to indicate that the first A side row BWP corresponding to a TCI state.
  • FIG. 9 shows a schematic diagram of the format of configuration information 1 according to the embodiment of the present application. It is assumed that in the process of beam selection and beam measurement, the first terminal uses 16 sidelink reference signal resources. Therefore, 4 bits may be used in the configuration information 1 to indicate the resource identifier of the sidelink reference signal.
  • the TCI state set 1 supports 4 QCL types in total, so 2 bits are reserved in the configuration information 1 to indicate the QCL type contained in each TCI state in the first TCI state.
  • the configuration information 1 may include the total number M of TCI states contained in the TCI state set 1, the identification of each TCI state in the TCI state set 1, the identification of the sidelink reference signal contained in each TCI state in the TCI state set 1, and the TCI state set Types of QCLs included in each TCI state in 1.
  • the identifier of each TCI state in the TCI state set 1 includes: an identifier of the first TCI state, an identifier of the second TCI state, an identifier of the third TCI state, and an identifier of the fourth TCI state.
  • the identification of the side reference signal contained in each TCI state in TCI state set 1 includes: the identification of the first reference signal contained in the first TCI state, the identification of the second reference signal contained in the second TCI state, and the identification of the second reference signal contained in the third TCI state.
  • the association relationship between the identifier of each TCI state and the identifier of the sidelink reference signal in the TCI state set 1 may be predefined or preconfigured in the second terminal.
  • the following uses Figure 10 as an example for introduction.
  • Fig. 10 shows a schematic diagram of the format of configuration information 1 according to another embodiment of the present application.
  • the identifiers of the four TCI states included in the TCI state set 1 are numbered sequentially from index 0, that is, the identifiers of the four TCI states are respectively identifier 0, identifier 1, identifier 2, and identifier 3.
  • the first terminal uses 16 sidelink reference signal resources. Therefore, 4 bits may be used in the configuration information 1 to indicate the resource identifier of the sidelink reference signal.
  • the TCI state set 1 supports 4 QCL types in total, so 2 bits may be reserved in the configuration information 1 to indicate the QCL type contained in each TCI state in the first TCI state.
  • the identifiers of the sidelink reference signals associated therewith may be sequentially indexed starting from the identifier 0. That is, the identifier 0 of the TCI state is associated with the identifier of the first lateral reference signal, the identifier 1 of the TCI state is associated with the identifier of the second lateral reference signal, the identifier 2 of the TCI state is associated with the identifier of the third lateral reference signal, and the identifier of the TCI state 3. Associate the identifier of the fourth side row reference signal.
  • the configuration information 1 may include the total number M of TCI states contained in the TCI state set 1, the identification of the sidelink reference signal contained in each TCI state in the TCI state set 1, and the QCL type.
  • the identification of the side reference signal contained in each TCI state in TCI state set 1 includes: the identification of the first reference signal contained in the first TCI state, the identification of the second reference signal contained in the second TCI state, and the identification of the second reference signal contained in the third TCI state.
  • association relationship between the TCI state identifier and the sidelink reference signal identifier may also be configured in a pre-configured or predefined manner, which is not limited in this embodiment of the present application.
  • the second terminal can use predefined or predefined
  • the QCL type is configured in a configuration mode, without configuring through the configuration information 1, so as to reduce the overhead generated by transmitting the configuration information 1.
  • Fig. 11 shows a schematic diagram of the format of configuration information 1 according to another embodiment of the present application. It is assumed that in the process of beam selection and beam measurement, the first terminal uses 16 sidelink reference signal resources. Therefore, 4 bits may be used in the configuration information 1 to indicate the resource identifier of the sidelink reference signal.
  • the QCL type contained in each TCI state in the TCI state set 1 may be preconfigured in the second terminal as the quasi-co-location type D.
  • the configuration information 1 may include the total number M of TCI states included in the TCI state set 1, and the identifier of the sidelink reference signal included in each TCI state in the TCI state set 1.
  • the identification of the side reference signal contained in each TCI state in the TCI state set 1 includes: the identification of the first reference signal contained in the first TCI state, the identification of the second reference signal contained in the second TCI state, the identification of the third TCI The identifier of the third reference signal included in the state, and the identifier of the fourth reference signal included in the fourth TCI state.
  • the QCL type contained in each TCI state in the TCI state set 1 can be predefined or pre-stored at the second terminal, and according to the identification order of the TCI states in the TCI state set, from The identification of the side row reference signal associated with the sequence index starting from 0.
  • the following uses Figure 12 as an example for introduction.
  • Fig. 12 shows a schematic diagram of the format of configuration information 1 according to another embodiment of the present application. It is assumed that in the process of beam selection and beam measurement, the first terminal uses 16 sidelink reference signal resources. Therefore, 4 bits may be used in the configuration information 1 to indicate the resource identifier of the sidelink reference signal.
  • the TCI state set 1 supports 4 QCL types in total, so 2 bits are reserved in the configuration information 1 to indicate the QCL type contained in each TCI state in the first TCI state.
  • the QCL type contained in each TCI state in the TCI state set 1 may be preconfigured in the second terminal as the quasi-co-location type D.
  • the identifications of the side reference signals associated therewith are sequentially indexed from identification 0. That is, the identifier 0 of the TCI state is associated with the identifier of the first lateral reference signal, the identifier 1 of the TCI state is associated with the identifier of the second lateral reference signal, the identifier 2 of the TCI state is associated with the identifier of the third lateral reference signal, and the identifier of the TCI state 3. Associate the identifier of the fourth side row reference signal.
  • the configuration information 1 may include the total number M of TCI states contained in the TCI state set 1, and the identifier of the sidelink reference signal.
  • the identifier of the side reference signal includes an identifier of the first reference signal, an identifier of the second reference signal, an identifier of the third reference signal, and an identifier of the fourth reference signal.
  • the second terminal can determine the receiving beam used by the receiving side data. If the time domain resource occupied by the indication information is not configured, it may cause the second terminal to be too late to process the indication information ( For example, demodulation) has to receive sidelink data, resulting in degraded sidelink communication quality. For example, referring to FIG.
  • the second terminal needs time to process data after receiving the PSCCH, which may cause the second terminal to be unable to parse the indication information from the first-order SCI in time to determine the PSSCH associated with the received first-order SCI. receive beam.
  • a third time interval between the transmission time of the indication information and the transmission time of the sidelink data may be configured.
  • the third time interval is used to represent the processing time, which is the time required for the second terminal to obtain the QCL information from the received SCI (or MAC CE) and apply it to the reception of the subsequent side data.
  • the third time interval may be represented by the number of sidebar symbols.
  • the third time interval may be represented by the number of time slots.
  • the above third time interval may be 1 time slot (14 symbols), or the above third time interval may also be defined as 2 time slots (28 symbols).
  • the embodiment of the present application does not limit the quantization manner of the third time interval, and the third time interval may also be quantized using other time domain units.
  • the above-mentioned third time interval may be defined for the terminal in a predefined manner, and the above-mentioned third time interval may also be configured for the terminal in a pre-configured manner.
  • the above-mentioned third time interval may be defined by the parameter "timeDurationForQCL", see FIG. 13 .
  • the above third time interval can be understood as the time interval between the sending time of the indication information and the sending time of the side data, or the time interval between the receiving time of the indication information and the receiving time of the side data, Alternatively, it may indicate the time interval between the time of sending the information and the time of receiving the side data, or indicate the time interval between the time of receiving the information and the time of sending the side data. This embodiment of the present application does not limit it.
  • the second terminal after receiving the configuration information 1 to configure the TCI state set 1, the second terminal also needs to receive indication information to determine the first TCI state. If the time interval between the transmission of the configuration information 1 and the transmission time of the indication information is too short, it is possible that the second terminal has not had time to process the configuration information 1 to obtain the TCI state set 1 before receiving the indication information, resulting in configuration The processing of message 1 failed, and TCI status set 1 could not be obtained.
  • the first time interval between the transmission time of the indication information and the transmission time of the configuration information 1 may be configured to be greater than or equal to the first threshold.
  • the time domain resource occupied by the indication information is not earlier than the first time domain resource, where the first time domain resource is determined according to the time domain resource occupied by the configuration information 1 and the first time interval.
  • the above first time interval between the transmission time of the indication information and the transmission time of the configuration information 1 can be understood as the time interval between the transmission time of the indication information and the transmission time of the configuration information 1, or the receiving time of the indication information
  • first threshold or first time interval may be configured in one or more of the following manners: preconfigured, predefined, network configuration, indicated by the first terminal, or indicated by the second terminal.
  • the first terminal configures the TCI state set for the second terminal, it also needs to send indication information to the second terminal to indicate which TCI state in the TCI state set the second terminal uses.
  • indication information For example, when the above TCI state set includes 4 TCI states, then 2 bits need to be reserved in the indication information to indicate the TCI state used by the second terminal.
  • the above TCI state set includes 16 TCI states, then 4 bits need to be reserved in the indication information to indicate the TCI state used by the second terminal.
  • the second terminal may be configured to activate only a subset of TCI state set 1, that is, TCI state set 2.
  • the first terminal can indicate the TCI state (the first TCI state) used by the second terminal from the TCI state set 2 through the indication information.
  • the TCI state set 2 is a subset of the TCI state set 1, it reduces the possibility that the indication information indicates that the second terminal uses the TCI state, which is beneficial to reduce the bits reserved in the indication information and reduce the overhead of transmitting indication information.
  • the scheme of configuring TCI state set 1 for the second terminal can refer to the scheme of configuring TCI state set 1 above.
  • the terminal configures a scheme of TCI state set 2 (ie, a subset).
  • the first terminal may configure the above TCI state set 2 for the second terminal by sending configuration information 2 .
  • the above configuration information 2 may include TCI state identification information, where the TCI state identification information is used to indicate the identification of the activated TCI state in the TCI state set 1 .
  • the configuration information 2 may further include a bitmap, and the length of the bitmap may be determined according to the total number of TCI states in the TCI state set 1 . If the bit in the bitmap takes the first value, it means that the TCI state corresponding to the bit belongs to the TCI state set 2 . If the bit in the bitmap takes the second value, it means that the TCI state corresponding to the bit does not belong to the TCI state set 2, wherein the first value is different from the second value.
  • the length of the bitmap above is determined according to the total number of TCI states in the TCI state set 1, which may include that the length of the bitmap is the same as the total number of TCI states in the TCI state set 1, or that the number of bits in the bitmap is equal to TCI The total number of TCI states in state set 1.
  • each bit in the bitmap corresponds to a TCI state in the TCI state set 1 .
  • the number of bits in the bitmap can also be an integer multiple of the total number of TCI states in the TCI state set 1, for example, 2 times, so that every 2 bits in the bitmap correspond to one of the TCI state sets 1 TCI status.
  • the examples of this application are not limited to this.
  • the total number P of TCI states in the TCI state set 2 may be carried in the configuration information 2.
  • the total number P of TCI states in the TCI state set 2 may not be carried in the configuration information 2, which is not limited in this embodiment of the present application.
  • FIG. 14 is a schematic diagram of the format of configuration information 2 according to the embodiment of the present application. Assume that TCI state set 1 includes 16 TCI states. Therefore, the identifier of the TCI state can be indicated by 4 bits in the configuration information 2 . In addition, the configuration information 2 needs to activate the 4 TCI states in the TCI state set 1 as the TCI state set 2 .
  • the configuration information 2 may carry the total number of TCI state sets 2 and the identifiers of the four TCI states in the TCI state set 2 .
  • the identifier of the TCI state carried in the configuration information 2 includes: an identifier of the first TCI state, an identifier of the second TCI state, an identifier of the third TCI state, and an identifier of the fourth TCI state.
  • Fig. 15 is a schematic diagram of the format of configuration information 2 according to another embodiment of the present application. Assume that TCI state set 1 includes 16 TCI states. Therefore, whether the TCI state belongs to the TCI state set 2 may be indicated in the configuration information 2 through a bitmap including 16 bits (T0-T15). In addition, four TCI states need to be activated through configuration information 2 as TCI state set 2 .
  • the relationship between the bit in the bitmap and the TCI state identifier in TCI state set 1 is: the TCI state identifier corresponding to bit T0 is 0, the TCI state identifier corresponding to bit T1 is 1, and the bit The TCI state identifier corresponding to T2 is 2, the TCI state identifier corresponding to bit T3 is 3, the TCI state identifier corresponding to bit T4 is 4, the TCI state identifier corresponding to bit T5 is 5, and bit T6 corresponds to The TCI state identification of bit T7 is 6, the TCI state identification corresponding to bit T7 is 7, the TCI state identification corresponding to bit T8 is 8, the TCI state identification corresponding to bit T9 is 9, and the TCI state corresponding to bit T10 is 9.
  • the identification of the state is 10, the identification of the TCI state corresponding to the bit T11 is 11, the identification of the TCI state corresponding to the bit T12 is 12, the identification of the TCI state corresponding to the bit T13 is 13, and the identification of the TCI state corresponding to the bit T14 is The identifier is 14, and the identifier of the TCI state corresponding to bit T15 is 15.
  • the TCI state that needs to be activated in the configuration information 2 is the TCI state marked as 0-3, it is only necessary to set the bits T0-T3 in the bitmap to the first value (for example, 1) to Indicates that the TCI states marked 0-3 belong to TCI state set 2.
  • the remaining bits T4-T15 are set to a second value (for example, 0) to indicate that the TCI states marked as 4-15 do not belong to the TCI state set 2.
  • TCI status identifier and the bit can also correspond in other ways, which is not limited in the embodiment of the present application. .
  • the configuration information 2 can be carried in the MAC CE, and the indication information can be carried in the SCI.
  • the configuration information 2 may be carried in the first MAC CE, and the indication information may be carried in the second MAC CE.
  • the configuration information 2 may be carried in the first SCI, and the indication information may be carried in the second SCI.
  • the second terminal after receiving the configuration information 1 to configure the TCI state set 1, the second terminal also needs to receive the configuration information 2 to determine the TCI state set 2. If the time interval between the transmission of configuration information 1 and the transmission time of configuration information 2 is too short, it is possible that the second terminal has not had time to process configuration information 1 to obtain TCI state set 1 before receiving configuration information 2. As a result, the processing of configuration information 1 failed, and TCI status set 1 could not be obtained.
  • the second time interval between the transmission time of configuration information 2 and the transmission time of configuration information 1 may be set to be greater than or equal to the second threshold.
  • the time domain resource occupied by the configuration information 2 is no earlier than the second time domain resource, where the second time domain resource is determined according to the time domain resource occupied by the configuration information 1 and the second time interval.
  • the above-mentioned second time interval between the transmission time of configuration information 2 and the transmission time of configuration information 1 can be understood as the time interval between the transmission time of configuration information 2 and the transmission time of configuration information 1, or the time interval between the transmission time of configuration information 2 and the transmission time of configuration information 1, or, The time interval between the receiving time of configuration information 1 and the receiving time of configuration information 1, or the time interval between the sending time of configuration information 2 and the receiving time of configuration information 1, or the time interval between the receiving time of configuration information 2 and configuration information 1 for the time interval between send times.
  • This embodiment of the present application does not limit it.
  • second threshold or second time interval may be configured in one or more of the following manners: preconfigured, predefined, network configuration, indicated by the first terminal, or indicated by the second terminal.
  • the second terminal receives the indication information to determine the first TCI state after receiving the configuration information 2 to configure the TCI state set 2 . If the time interval between the transmission of the indication information and the transmission time of the configuration information 2 is too short, the second terminal may receive the indication information before it has time to process the configuration information 2 to obtain the TCI state set 2, resulting in configuration The processing of message 2 failed, and TCI status set 2 could not be obtained.
  • the fourth time interval between the transmission time of the configuration information 2 and the transmission time of the indication information may be configured to be greater than or equal to the third threshold.
  • the time domain resource occupied by the indication information is no earlier than the third time domain resource, wherein the third time domain resource is determined according to the time domain resource occupied by configuration information 2 and the fourth time interval, wherein the fourth time domain is the time interval between the transmission time of the configuration information 2 and the transmission time of the indicated configuration information.
  • the above fourth time interval can be understood as the time interval between the sending time of the configuration information 2 and the sending time of the indication information, or the time interval between the receiving time of the configuration information 2 and the receiving time of the indication information, or, Configure the time interval between the sending time of the information 2 and the receiving time of the indication information, or configure the time interval between the receiving time of the information 2 and the sending time of the indication information.
  • This embodiment of the present application does not limit it.
  • the third threshold or the fourth time interval may be configured in one or more of the following manners: preconfigured, predefined, network configuration, indicated by the first terminal, or indicated by the second terminal.
  • the first terminal can configure TCI state set 1 for the second terminal by sending configuration information 1, and/or configure TCI state set 2 for the second terminal by sending configuration information 2, but, in some cases, the first terminal A terminal may not be able to know whether the second terminal has received the corresponding configuration information. Therefore, side feed back can be activated, so that the second terminal can feed back the reception result to the first terminal, so that the first terminal can determine whether the second terminal has received the corresponding configuration information. information. For example, when the above-mentioned configuration information 1 and configuration information 2 are transmitted through the MAC CE, the second terminal may be activated to perform lateral feedback.
  • the second terminal device can also be activated to perform lateral feedback so that the second The terminal feeds back the receiving result to the first terminal, so that the first terminal determines whether the second terminal receives the indication information.
  • the second terminal may be activated to perform side feed back.
  • configuration information 1 can also be called “second configuration information”
  • configuration information 2 can also be called “first configuration information”.
  • information "TCI state set 1” may also be called “second TCI state set”
  • TCI state set 2 may also be called “first TCI state set”.
  • configuration information 1 may also be called “first configuration information”
  • TCI state set 1 may also be called “first TCI state set”.
  • FIG. 16 is a schematic diagram of a first terminal according to an embodiment of the present application.
  • the first terminal 1600 shown in FIG. 16 includes a generating unit 1610 and a sending unit 1620 .
  • a generating unit 1610 configured to generate indication information
  • a sending unit 1620 configured to send the indication information to the second terminal.
  • the indication information is used to indicate that the first transmission configuration indicates the TCI state, or, the indication information is used to indicate that the second terminal uses the first airspace receiving filter to receive sideline data, and the first airspace receiving filter
  • the device is the target spatial domain receiving filter used by the second terminal to receive the first sidelink reference signal, or the indication information is used to instruct the first terminal to use the first spatial domain transmission filter to send sidelink data
  • the second terminal A spatial transmission filter is a target spatial transmission filter used by the first terminal to transmit the first sidelink reference signal, or the indication information is used to instruct the second terminal to use the first spatial reception parameter to receive sidelink data
  • the first airspace receiving parameter is the same as the target airspace receiving parameter used by the second terminal to receive the first sidelink reference signal, or the indication information is used to instruct the first terminal to use the first airspace sending parameter to send the sidelink data
  • the first airspace transmission parameter is the same as the target airspace transmission parameter used by the first terminal to send the first sidelink reference signal.
  • the reference signal included in the first TCI state is the first side row reference signal, and/or the quasi-co-located QCL type included in the first TCI state is quasi-co-located type D.
  • the indication information is carried in the Sidelink Control Information SCI, the Medium Access Control Element MAC CE or the PC5-Radio Resource Control PC5-RRC signaling.
  • the first TCI state belongs to a first TCI state set
  • the indication information instructs the second terminal to use the first TCI state in the first TCI state set.
  • the indication information is an identifier of the first TCI state in the first TCI state set.
  • the sending unit 1620 is further configured to send first configuration information to the second terminal, where the first configuration information is used to configure the first TCI state set.
  • the first configuration information includes the total number of TCI states in the first TCI state set.
  • the first configuration information further includes an identifier of a sidelink carrier associated with the first TCI state set, and/or an identifier of a sidelink bandwidth part BWP associated with the first TCI state set.
  • the TCI state in the first TCI state set includes at least one of an identifier of the TCI state, indication information of a reference signal associated with the TCI state, and QCL type information.
  • the first time interval between the transmission time of the indication information and the transmission time of the first configuration information is greater than or equal to a first threshold; or, the time domain resource occupied by the indication information is no earlier than the first threshold.
  • a time domain resource, wherein the first time domain resource is determined according to the time domain resource occupied by the first configuration information and the first time interval.
  • the first threshold or the first time interval is configured according to one or more of the following methods: pre-configured, predefined, network configuration, indicated by the first terminal, or by the second terminal instructions.
  • the first configuration information is carried in PC5-RRC signaling, and the indication information is carried in SCI or MAC CE, or the first configuration information is carried in MAC CE, and the indication information Carried in SCI.
  • the sending unit 1620 is further configured to send second configuration information to the second terminal, where the second configuration information is used to configure a second TCI state set, where the first TCI state set is the A subset of the second TCI state set.
  • the first configuration information includes a bitmap, and the length of the bitmap is determined according to the total number of TCI states in the second TCI state set.
  • the bits in the bitmap take a first value to indicate that the TCI state corresponding to the bit belongs to the first TCI state set; the bits in the bitmap take a second value to indicate that the TCI state corresponding to the bit belongs to the first TCI state set; The TCI state corresponding to the bit does not belong to the first TCI state set, and the first value is different from the second value.
  • a second time interval between the transmission time of the first configuration information and the transmission time of the second configuration information is greater than or equal to a second threshold; or, the time domain resource of the first configuration information is not earlier than the second time domain resource, wherein the second time domain resource is determined according to the time domain resource of the second configuration information and the second time interval.
  • the second threshold or the second time interval is configured in one or more of the following ways: pre-configured, predefined, network configuration information, indicated by the first terminal, and configured by the second terminal instructions.
  • the second configuration information is carried in PC5-RRC signaling
  • the first configuration information is carried in MAC CE
  • the indication information is carried in SCI.
  • FIG. 17 is a schematic diagram of a second terminal according to an embodiment of the present application.
  • the second terminal 1700 shown in FIG. 17 includes a receiving unit 1710 and a sending unit 1720 .
  • a receiving unit 1710 configured to receive indication information sent by the first terminal
  • the sending unit 1720 is configured to receive sidelink data sent by the first terminal based on the indication information.
  • the indication information is used to indicate that the first transmission configuration indicates the TCI state, or, the indication information is used to indicate that the second terminal uses the first airspace receiving filter to receive the sidelink data, and the first airspace
  • the receiving filter is the target spatial receiving filter used by the second terminal to receive the first sidelink reference signal, or the indication information is used to instruct the first terminal to use the first spatial transmitting filter to send the sidelink data
  • the first spatial domain transmission filter is the target spatial domain transmission filter used by the first terminal to transmit the first sidelink reference signal
  • the indication information is used to instruct the second terminal to use the first spatial domain reception parameter to receive
  • the first airspace receiving parameter is the same as the target airspace receiving parameter used by the second terminal to receive the first sidelink reference signal
  • the indication information is used to instruct the first terminal to use the first
  • the sidelink data is sent with an airspace transmission parameter, and the first airspace transmission parameter is the same as the target airspace transmission parameter used by the first terminal to send the first sidelink reference signal.
  • the reference signal included in the first TCI state is the first side row reference signal, and/or the quasi-co-located QCL type included in the first TCI state is quasi-co-located type D.
  • the indication information is carried in the Sidelink Control Information SCI, the Medium Access Control Element MAC CE or the PC5-Radio Resource Control PC5-RRC signaling.
  • the first TCI state belongs to a first TCI state set
  • the indication information instructs the second terminal to use the first TCI state in the first TCI state set.
  • the indication information is an identifier of the first TCI state in the first TCI state set.
  • the receiving unit 1710 is further configured to receive first configuration information sent by the first terminal, where the first configuration information is used to configure the first TCI state set.
  • the first configuration information includes the total number of TCI states in the first TCI state set.
  • the first configuration information further includes an identifier of a sidelink carrier associated with the first TCI state set, and/or an identifier of a sidelink bandwidth part BWP associated with the first TCI state set.
  • the TCI state in the first TCI state set includes at least one of an identifier of the TCI state, indication information of a reference signal associated with the TCI state, and QCL type information.
  • the first time interval between the transmission time of the indication information and the transmission time of the first configuration information is greater than or equal to a first threshold; or, the time domain resource occupied by the indication information is no earlier than the first threshold.
  • a time domain resource, wherein the first time domain resource is determined according to the time domain resource occupied by the first configuration information and the first time interval.
  • the first threshold or the first time interval is configured according to one or more of the following methods: pre-configured, predefined, network configuration, indicated by the first terminal, or by the second terminal instructions.
  • the first configuration information is carried in PC5-RRC signaling, and the indication information is carried in SCI or MAC CE, or the first configuration information is carried in MAC CE, and the indication information Carried in SCI.
  • the receiving unit 1710 is further configured to receive second configuration information sent by the first terminal, where the second configuration information is used to configure a second TCI state set, where the first TCI state set is A subset of the second set of TCI states.
  • the first configuration information includes a bitmap, and the length of the bitmap is determined according to the total number of TCI states in the second TCI state set.
  • the bits in the bitmap take a first value to indicate that the TCI state corresponding to the bit belongs to the first TCI state set; the bits in the bitmap take a second value to indicate that the TCI state corresponding to the bit belongs to the first TCI state set; The TCI state corresponding to the bit does not belong to the first TCI state set, and the first value is different from the second value.
  • a second time interval between the transmission time of the first configuration information and the transmission time of the second configuration information is greater than or equal to a second threshold; or, the time domain resource of the first configuration information is not earlier than the second time domain resource, wherein the second time domain resource is determined according to the time domain resource of the second configuration information and the second time interval.
  • the second threshold or the second time interval is configured in one or more of the following ways: pre-configured, predefined, network configuration information, indicated by the first terminal, and configured by the second terminal instructions.
  • the second configuration information is carried in PC5-RRC signaling
  • the first configuration information is carried in MAC CE
  • the indication information is carried in SCI.
  • Fig. 18 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the dashed line in Figure 18 indicates that the unit or module is optional.
  • the apparatus 1800 may be used to implement the methods described in the foregoing method embodiments.
  • Apparatus 1800 may be a chip, a terminal device or a network device.
  • Apparatus 1800 may include one or more processors 1810 .
  • the processor 1810 may support the device 1800 to implement the methods described in the foregoing method embodiments.
  • the processor 1810 may be a general purpose processor or a special purpose processor.
  • the processor may be a central processing unit (central processing unit, CPU).
  • the processor can also be other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), off-the-shelf programmable gate arrays (field programmable gate arrays, FPGAs) Or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • Apparatus 1800 may also include one or more memories 1820 .
  • a program is stored in the memory 1820, and the program can be executed by the processor 1810, so that the processor 1810 executes the methods described in the foregoing method embodiments.
  • the memory 1820 may be independent from the processor 1810 or may be integrated in the processor 1810 .
  • the apparatus 1800 may also include a transceiver 1830 .
  • the processor 1810 can communicate with other devices or chips through the transceiver 1830 .
  • the processor 1810 may send and receive data with other devices or chips through the transceiver 1830 .
  • the embodiment of the present application also provides a computer-readable storage medium for storing programs.
  • the computer-readable storage medium can be applied to the terminal or the network device provided in the embodiments of the present application, and the program causes the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • the embodiment of the present application also provides a computer program product.
  • the computer program product includes programs.
  • the computer program product can be applied to the terminal or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the terminal or the network device provided in the embodiments of the present application, and the computer program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • system and “network” may be used interchangeably in this application.
  • the terms used in the application are only used to explain the specific embodiments of the application, and are not intended to limit the application.
  • the terms “first”, “second”, “third” and “fourth” in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order .
  • the terms “include” and “have”, as well as any variations thereof, are intended to cover a non-exclusive inclusion.
  • the "indication" mentioned may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, or configures and is configured And so on.
  • predefined or “preconfigured” can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices), This application does not limit its specific implementation.
  • pre-defined may refer to defined in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, for example, it may include LTE protocol, NR protocol and related protocols applied in future communication systems, which is not limited in this application.
  • determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.
  • serial numbers of the above-mentioned processes do not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, rather than the implementation process of the embodiments of the present application. constitute any limitation.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device 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 can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be read by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (digital video disc, DVD)) or a semiconductor medium (for example, a solid state disk (solid state disk, SSD) )wait.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a digital versatile disc (digital video disc, DVD)
  • a semiconductor medium for example, a solid state disk (solid state disk, SSD)

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de communication et un terminal. Le procédé comprend les étapes suivantes : un premier terminal génère des informations d'indication ; et le premier terminal envoie les informations d'indication à un second terminal. Le premier terminal envoie les informations d'indication au second terminal, de sorte que le second terminal détermine, sur la base des informations d'indication, un faisceau de réception correspondant à un faisceau de transmission sélectionné par le premier terminal ; on évite que, dans un scénario de communication de liaison latérale classique, le second terminal ne puisse pas sélectionner le faisceau de réception correspondant au faisceau de transmission car le faisceau de transmission sélectionné par le premier terminal ne peut pas être obtenu ; et la qualité de communication de liaison latérale peut être améliorée.
PCT/CN2021/116329 2021-09-02 2021-09-02 Procédé de communication et terminal WO2023028969A1 (fr)

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PCT/CN2021/116329 WO2023028969A1 (fr) 2021-09-02 2021-09-02 Procédé de communication et terminal
CN202180099336.6A CN117480834A (zh) 2021-09-02 2021-09-02 通信方法及终端

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US20230119853A1 (en) * 2021-10-18 2023-04-20 Qualcomm Incorporated Mac ce format for sidelink tci

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WO2020033549A1 (fr) * 2018-08-10 2020-02-13 Intel Corporation Configuration tci et qcl dans des réseaux 5g
US20200413391A1 (en) * 2019-06-27 2020-12-31 Qualcomm Incorporated Beam configurations for multicast and broadcast communications
US20200413374A1 (en) * 2019-06-27 2020-12-31 Qualcomm Incorporated Signaling for sidelink beam operation
CN112534750A (zh) * 2018-08-09 2021-03-19 鸿颖创新有限公司 用于在无线通信系统中执行侧行链路通信的方法和设备

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WO2020033549A1 (fr) * 2018-08-10 2020-02-13 Intel Corporation Configuration tci et qcl dans des réseaux 5g
US20200413391A1 (en) * 2019-06-27 2020-12-31 Qualcomm Incorporated Beam configurations for multicast and broadcast communications
US20200413374A1 (en) * 2019-06-27 2020-12-31 Qualcomm Incorporated Signaling for sidelink beam operation

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230119853A1 (en) * 2021-10-18 2023-04-20 Qualcomm Incorporated Mac ce format for sidelink tci

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