WO2023019463A1 - 无线通信的方法和设备 - Google Patents
无线通信的方法和设备 Download PDFInfo
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
Definitions
- the embodiments of the present application relate to the communication field, and in particular to a method and device for wireless communication.
- NR New Radio
- an effective solution is based on a large-scale antenna array (Massive MIMO) to form a shaped beam with greater gain and overcome propagation loss. Make sure the system is covered. For example, different beams are used to cover the entire cell.
- Mass MIMO massive MIMO
- the present application provides a method and device for wireless communication, which is beneficial for selecting an optimal airspace transmission filter between a transmitting terminal and a receiving terminal.
- a method for wireless communication including: a first terminal device sends M channel state information reference signals CSI-RS to a second terminal device using a spatial transmission filter, and the M CSI-RS are used for Selecting a target spatial domain transmission filter; wherein, the M CSI-RSs correspond to multiple CSI-RS resources in the target CSI-RS resource set, and M is a positive integer.
- a wireless communication method including: a second terminal device receiving M channel state information reference signals CSI-RS sent by a first terminal device, wherein the M CSI-RS are used to select a target In the spatial domain transmission filter, the M CSI-RSs correspond to multiple CSI-RS resources in the target CSI-RS resource set, and M is a positive integer.
- a terminal device configured to execute the method in the foregoing first aspect or various implementation manners thereof.
- the terminal device includes a functional module for executing the method in the above first aspect or its various implementation manners.
- a terminal device configured to execute the method in the foregoing second aspect or its various implementation manners.
- the network device includes a functional module for executing the method in the above second aspect or each implementation manner thereof.
- a terminal device including a processor and a memory.
- the memory is used to store a computer program
- the processor is used to call and run the computer program stored in the memory to execute the method in the above first aspect or its various implementations.
- a terminal device including a processor and a memory.
- the memory is used to store a computer program
- the processor is used to call and run the computer program stored in the memory to execute the method in the above second aspect or its various implementations.
- a chip is provided for implementing any one of the above first aspect to the second aspect or the method in each implementation manner thereof.
- the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the device executes any one of the above-mentioned first to second aspects or any of the implementations thereof. method.
- a computer-readable storage medium for storing a computer program, and the computer program causes a computer to execute any one of the above-mentioned first to second aspects or the method in each implementation manner thereof.
- a ninth aspect provides a computer program product, including computer program instructions, the computer program instructions cause a computer to execute any one of the above first to second aspects or the method in each implementation manner.
- a computer program which, when running on a computer, causes the computer to execute any one of the above-mentioned first to second aspects or the method in each implementation manner.
- the transmitting terminal uses the airspace transmission filter to transmit M CSI-RSs to the receiving terminal.
- the receiving terminal can measure the M CSI-RSs, which is beneficial for selecting the transmitting terminal and the receiving terminal.
- Fig. 1 is a schematic diagram of a communication system architecture provided by the present application.
- Fig. 2 is a schematic diagram of another communication system architecture provided by the present application.
- Fig. 3 is a schematic diagram of uplink communication within a network coverage provided by the present application.
- Fig. 4 is a schematic diagram of partial network coverage side communication provided by the present application.
- Fig. 5 is a schematic diagram of outbound communication provided by the network coverage provided by the present application.
- Fig. 6 is a schematic diagram of unicast sidelink communication provided by the present application.
- Fig. 7 is a schematic diagram of multicast sideline communication provided by the present application.
- Fig. 8 is a schematic diagram of broadcast sideline communication provided by the present application.
- FIG. 9 is a schematic diagram of a time slot structure of NR-V2X.
- Fig. 10 is a schematic diagram of a system without using analog beams and using analog beams.
- Fig. 11 is a schematic interaction diagram of a wireless communication method provided by an embodiment of the present application.
- FIG. 12 is a schematic diagram of a sending beam used by a sending terminal.
- Fig. 13 is a schematic diagram of a process of determining a transmission beam by a transmitting terminal and a receiving terminal.
- FIG. 20 is a schematic diagram of a MAC CE carrying first information according to an embodiment of the present application.
- FIG. 21 is a schematic diagram of another MAC CE carrying first information according to an embodiment of the present application.
- Fig. 22 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.
- Fig. 23 is a schematic block diagram of another terminal device provided according to an embodiment of the present application.
- Fig. 24 is a schematic block diagram of a communication device provided according to an embodiment of the present application.
- Fig. 25 is a schematic block diagram of a chip provided according to an embodiment of the present application.
- Fig. 26 is a schematic block diagram of a communication system provided according to an embodiment of the present application.
- the technical solution of the embodiment of the present application can be applied to various communication systems, such as: Global System of Mobile communication (Global System of Mobile communication, GSM) system, code division multiple access (Code Division Multiple Access, CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum) on unlicensed spectrum unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunications System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.
- GSM Global System of Mobile
- D2D Device to Device
- M2M Machine to Machine
- MTC Machine Type Communication
- V2V Vehicle to Vehicle
- V2X Vehicle to everything
- the communication system in the embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, may also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and may also be applied to an independent (Standalone, SA) deployment Web scene.
- Carrier Aggregation, CA Carrier Aggregation
- DC Dual Connectivity
- SA independent deployment Web scene
- the communication system in the embodiment of the present application may be applied to an unlicensed spectrum, where the unlicensed spectrum may also be considered as a shared spectrum; or, the communication system in the embodiment of the present application may also be applied to a licensed spectrum, where, Licensed spectrum can also be considered as non-shared spectrum.
- the embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, wherein the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
- user equipment User Equipment, UE
- access terminal user unit
- user station mobile station
- mobile station mobile station
- remote station remote terminal
- mobile device user terminal
- terminal wireless communication device
- wireless communication device user agent or user device
- the terminal device can be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, next-generation communication systems such as terminal devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.
- PLMN Public Land Mobile Network
- the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites) superior).
- the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, or wireless terminal equipment in smart home.
- a virtual reality (Virtual Reality, VR) terminal device an augmented reality (Augmented Reality, AR) terminal Equipment
- wireless terminal equipment in industrial control wireless terminal equipment in self driving
- wireless terminal equipment in remote medical wireless terminal equipment in smart grid
- wireless terminal equipment in transportation safety wireless terminal equipment in smart city, or wireless terminal equipment in smart home.
- the terminal device may also be a wearable device.
- Wearable devices can also be called wearable smart devices, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
- a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction.
- Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.
- the network device may be a device for communicating with the mobile device, and the network device may be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA , or a base station (NodeB, NB) in WCDMA, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and an NR network A network device or a base station (gNB) in a network device or a network device in a future evolved PLMN network or a network device in an NTN network.
- AP Access Point
- BTS Base Transceiver Station
- NodeB, NB base station
- Evolutional Node B, eNB or eNodeB evolved base station
- LTE Long Term Evolution
- eNB evolved base station
- gNB base station
- the network device may have a mobile feature, for example, the network device may be a mobile device.
- the network equipment may be a satellite or a balloon station.
- the satellite can be a low earth orbit (low earth orbit, LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous earth orbit (geosynchronous earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite. ) Satellite etc.
- the network device may also be a base station installed on land, water, and other locations.
- the network device may provide services for a cell, and the terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device ( For example, a cell corresponding to a base station), the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell (Small cell), and the small cell here may include: a metro cell (Metro cell), a micro cell (Micro cell), a pico cell ( Pico cell), Femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
- the transmission resources for example, frequency domain resources, or spectrum resources
- the cell may be a network device (
- the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell (Small cell)
- the small cell here may include: a metro cell (Metro cell), a micro cell (Micro
- the "indication" mentioned in the embodiments of the present application 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, configuration and is configuration etc.
- 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).
- the 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, may include the LTE protocol, the NR protocol, and related protocols applied to future communication systems, which is not limited in the present application.
- Fig. 1 is a schematic diagram of a communication system to which the embodiment of the present application is applicable.
- the transmission resources of the vehicle-mounted terminals (vehicle-mounted terminal 121 and vehicle-mounted terminal 122 ) are allocated by the base station 110 , and the vehicle-mounted terminals transmit data on the sidelink according to the resources allocated by the base station 110 .
- the base station 110 may allocate resources for a single transmission to the terminal, or may allocate resources for semi-static transmission to the terminal.
- Fig. 2 is a schematic diagram of another communication system to which the embodiment of the present application is applicable.
- the vehicle-mounted terminals (vehicle-mounted terminal 131 and vehicle-mounted terminal 132 ) autonomously select transmission resources on sidelink resources for data transmission.
- the vehicle-mounted terminal may select transmission resources randomly, or select transmission resources by listening.
- side communication according to the network coverage of the communicating terminal, it can be divided into network coverage inner communication, as shown in Figure 3; part of the network coverage side communication, as shown in Figure 4 ; and network coverage outer line communication, as shown in FIG. 5 .
- Figure 3 In inline communication within the network coverage, all terminals performing sideline communication are within the coverage of the base station. Therefore, the above-mentioned terminals can perform sideline communication based on the same sideline configuration by receiving configuration signaling from the base station .
- FIG 4 In the case of partial network coverage for sidelink communication, some terminals performing sidelink communication are located within the coverage of the base station. These terminals can receive configuration signaling from the base station and perform sidelink communication according to the configuration of the base station. However, terminals located outside the network coverage cannot receive the configuration signaling from the base station. In this case, the terminals outside the network coverage will use the pre-configuration information and the physical The information carried in the Physical Sidelink Broadcast Channel (PSBCH) determines the sidelink configuration for sidelink communication.
- PSBCH Physical Sidelink Broadcast Channel
- Figure 5 For outbound communication under network coverage, all terminals performing side communication are located outside the network coverage, and all terminals determine side communication according to pre-configuration information to perform side communication.
- device-to-device communication is based on a sidelink (Sidelink, SL) transmission technology based on device to device (D2D), and the communication data in the traditional cellular system is received or sent through the base station.
- SL sidelink
- D2D device to device
- the Internet of Vehicles system adopts the method of terminal-to-terminal direct communication, so it has higher spectral efficiency and lower transmission delay.
- Two transmission modes are defined in 3GPP, which are respectively recorded as: the first mode and the second mode.
- the first mode the transmission resources of the terminal are allocated by the base station, and the terminal sends data on the sidelink according to the resources allocated by the base station; the base station can allocate resources for a single transmission to the terminal, and can also allocate semi-static transmission to the terminal H. As shown in FIG. 3 , the terminal is located within the coverage of the network, and the network allocates transmission resources for sidelink transmission to the terminal.
- the second mode the terminal selects a resource from the resource pool for data transmission.
- the terminal is located outside the coverage of the cell, and the terminal independently selects transmission resources from the pre-configured resource pool for sidelink transmission; or, as shown in Figure 3, the terminal independently selects transmission resources from the resource pool configured by the network Make sideways transfers.
- unicast transmission there is only one receiving terminal.
- the receiving terminal is all terminals in a communication group, or in All terminals within a certain transmission distance, as shown in Figure 7, UE1, UE2, UE3, and UE4 form a communication group, in which UE1 sends data, and other terminal devices in the group are receiver terminals; for broadcast transmission mode, its The receiving terminal is any terminal around the transmitting terminal.
- UE1 is the transmitting terminal, and other terminals around it, UE2-UE6 are all receiving terminals.
- time slot structure in NR-V2X will be described with reference to FIG. 9 .
- FIG. 9 represents a time slot structure not including a physical sidelink feedback channel (Physical Sidelink Feedback Channel, PSFCH) PSFCH in a time slot;
- PSFCH Physical Sidelink Feedback Channel
- the Physical Sidelink Control Channel starts from the second sidelink symbol of the time slot in the time domain and occupies 2 or 3 OFDM symbols.
- ⁇ 10, 12 15, 20, 25 ⁇ physical resource blocks (physical resource blocks, PRBs) can be occupied.
- PRBs physical resource blocks
- the sub-channel is the minimum granularity for Physical Sidelink Shared Channel (PSSCH) resource allocation in NR-V2X
- the number of PRBs occupied by PSCCH must be less than or equal to the number of PRBs in a sub-channel in the resource pool.
- the number of included PRBs so as not to impose additional restrictions on PSSCH resource selection or allocation.
- the PSSCH also starts from the second side row symbol of the time slot, the last time domain symbol in the time slot is a guard interval (Guard Period, GP) symbol, and the remaining symbols are mapped to the PSSCH.
- the first side row symbol in this time slot is the repetition of the second side row symbol.
- the receiving terminal uses the first side row symbol as an automatic gain control (Automatic Gain Control, AGC) symbol.
- AGC Automatic Gain Control
- Data is generally not used for data demodulation.
- the PSSCH occupies P subchannels in the frequency domain, and each subchannel includes Q consecutive PRBs, where P and Q are positive integers.
- Multi-beam multi-beam
- the design goal of the NR system includes large-bandwidth communication in a high-frequency band (for example, a frequency band above 6 GHz).
- a high-frequency band for example, a frequency band above 6 GHz.
- the path loss in the transmission process will increase, thereby affecting the coverage capability of the high-frequency system.
- an effective technical solution is based on a massive antenna array (Massive MIMO) to form a shaped beam with greater gain, overcome propagation loss, and ensure system coverage.
- Mass MIMO massive antenna array
- the millimeter-wave antenna array due to the shorter wavelength, smaller antenna element spacing and smaller aperture, allows more physical antenna elements to be integrated in a limited-sized two-dimensional antenna array.
- Due to the limited size of the millimeter-wave antenna array from Considering factors such as hardware complexity, cost overhead, and power consumption, digital beamforming cannot be used, but analog beamforming is usually used, which can reduce the complexity of device implementation while enhancing network coverage.
- a cell uses a wider beam (beam) to cover the entire cell. Therefore, at each moment, UEs within the coverage of the cell have a chance to obtain transmission resources allocated by the system.
- NR's Multi-beam system covers the entire cell through different beams, that is, each beam covers a small range, and the effect of multiple beams covering the entire cell is realized through time sweeping.
- FIG. 10 shows a schematic diagram of a system without beamforming and with beamforming.
- FIG. 10 is a schematic diagram of a traditional LTE system and an NR system without beamforming
- FIG. 10 is a schematic diagram of an NR system using beamforming.
- different beams are identified by different signals carried on them.
- synchronization signals/physical broadcast channel blocks (synchronization signal/physical broadcast channel block, SS/PBCH block, or SSB) are transmitted on different beams, and the UE can distinguish different beams through different SSBs.
- CSI-RS Channel State Information Reference Signal
- a physical downlink control channel Physical Downlink Control Channel, PDCCH
- a physical downlink shared channel Physical Downlink Shared Channel, PDSCH
- omnidirectional antennas or near-omnidirectional antennas are used to receive signals sent by the base station through different downlink transmission beams.
- a corresponding downlink receiving beam needs to be used to receive a signal sent by a corresponding downlink transmitting beam.
- corresponding beam indication information (beam indication) is needed to assist the terminal device to determine the related information of the transmitting beam on the network device side, or the corresponding receiving beam related information on the terminal device side.
- the beam indication information does not directly indicate the beam itself, but is indicated by quasi-co-located (QCL) ('QCL-TypeD' type) between signals.
- QCL quasi-co-located
- determining the statistical characteristics of receiving the corresponding channel/signal is also based on the QCL assumption.
- the terminal device When the terminal device receives signals, in order to improve the receiving performance, it can use the characteristics of the transmission environment corresponding to the data transmission to improve the receiving algorithm. For example, the statistical properties of the channel can be used to optimize the design and parameters of the channel estimator. In the NR system, these characteristics corresponding to data transmission are represented by QCL status (QCL-Info).
- QCL-Info QCL status
- the network When the device side is transmitting the downlink control channel or data channel, it will indicate the corresponding QCL status information to the terminal device through the Transmission Configuration Indicator (TCI) state.
- TRP Transmission Reception Point
- TRP Transmission Reception Point
- panel panel
- beam beam
- a TCI state may include the following configurations:
- TCI state ID used to identify a TCI state
- a QCL information contains the following information:
- QCL type configuration which can be one of QCL type A, QCL typeB, QCL typeC or QCL typeD;
- QCL reference signal configuration including the cell ID where the reference signal is located, the BWP ID and the identification of the reference signal (which can be a CSI-RS resource ID or a synchronization signal block (Synchronization Signal Block, SSB) index);
- the QCL type of at least one QCL information must be one of QCL typeA, QCL typeB, and QCL typeC, and the QCL type of the other QCL information must be QCL type D.
- 'QCL-TypeA' ⁇ Doppler shift (Doppler shift), Doppler spread (Doppler spread), average delay (average delay), delay spread (delay spread) ⁇ ;
- 'QCL-TypeB' ⁇ Doppler shift (Doppler shift), Doppler spread (Doppler spread) ⁇ ;
- 'QCL-TypeC' ⁇ Doppler shift (Doppler shift), average delay (average delay) ⁇ ;
- the network device side can indicate the corresponding TCI state for the downlink signal or downlink channel.
- the terminal device can assume that the target downlink signal It is the same as the large-scale parameter of the reference SSB or reference CSI-RS resource, and the large-scale parameter is determined through QCL type configuration.
- the terminal device can adopt and receive the reference SSB or reference CSI-RS resource.
- the target downlink channel or target downlink signal is received with reference to the receiving beam (that is, the Spatial Rx parameter) with the same CSI-RS resource.
- the target downlink channel (or downlink signal) and its reference SSB or reference CSI-RS resource are sent by the same TRP or the same panel or the same beam on the network device side. If the transmission TRP or transmission panel or transmission beam of two downlink signals or downlink channels are different, different TCI states are usually configured.
- control resource set (Control Resource Set, CORESET) TCI status.
- the available TCI state set is indicated by RRC signaling, and some of the TCI states are activated by MAC layer signaling, and finally activated by the TCI state indication field in the downlink control information (Downlink Control Information, DCI)
- DCI Downlink Control Information
- One or two TCI states are indicated in the TCI state for the PDSCH scheduled by the DCI.
- the millimeter wave frequency band is considered to be used in the sidelink transmission system.
- how to select the optimal transmission beam between the transmitting terminal and the receiving terminal is a problem that needs to be solved.
- this application proposes a scheme for determining the optimal spatial transmission filter between the transmitting terminal and the receiving terminal, which is beneficial to determine the optimal spatial transmission filter between the transmitting terminal and the receiving terminal .
- FIG. 11 is a schematic interaction diagram of a wireless communication method 200 according to an embodiment of the present application. As shown in FIG. 11 , the method 200 includes at least part of the following content:
- the first terminal device sends M channel state information reference signals CSI-RS to the second terminal device using the airspace transmission filter, and the M CSI-RSs are used to select a target airspace transmission filter, wherein the M The CSI-RS corresponds to multiple CSI-RS resources in the target CSI-RS resource set, and M is a positive integer.
- the second terminal device can measure the received CSI-RS, obtain the measurement result, and further perform CSI reporting or feedback according to the measurement result, so that the first terminal device can determine the target airspace transmission filter according to the CSI reporting or feedback. device.
- S210 may be replaced by: the first terminal device sends M side signals to the second terminal device using the airspace transmission filter, and the M sideline signals are used to select the target airspace transmission filter .
- the sidelink signal can be, for example, CSI-RS, demodulation reference signal (Demodulation Reference Signal, DMRS), positioning reference signal (positioning reference signals, PRS), phase tracking reference signal (Phase Tracking Reference Signal , PT-RS) or side line synchronization signal (including side line main synchronization signal and/or side line secondary synchronization signal), etc.
- the DMRS can be used for demodulation of Physical Sidelink Control Channel (Physical Sidelink Control Channel, PSCCH ) DMRS, or a DMRS used to demodulate a Physical Sidelink Shared Channel (PSSCH).
- PSSCH Physical Sidelink Shared Channel
- the sidelink signal is CSI-RS as an example for description, but the present application is not limited thereto.
- the first terminal device is a sending terminal
- the second terminal device is a receiving terminal
- a spatial domain transmission filter may also be referred to as a transmission beam, a spatial relation, or a spatial setting.
- the spatial transmit filter and the spatial receive filter are collectively referred to as a spatial filter
- the spatial transmit filter may also be referred to as a transmit-end spatial filter
- the spatial receive filter may also be referred to as a receive-end spatial filter.
- the sending of the CSI-RS by the first terminal device may also be expressed as sending the CSI-RS resource by the first terminal device, that is, the two are equivalent expressions.
- the CSI-RS measurement result is equivalent to the CSI-RS resource measurement result.
- each CSI-RS in the M CSI-RS corresponds to a CSI-RS resource in the target CSI-RS resource set
- the M CSI-RS corresponds to the target CSI-RS resource set
- the multiple CSI-RS resources in the RS resource set may refer to: the CSI-RS resources corresponding to the M CSI-RS are different in pairs, that is, the M CSI-RS and the multiple CSI-RS resources are in one-to-one correspondence or, among the M CSI-RSs, there are at least two CSI-RSs corresponding to different CSI-RS resources. That is, the first terminal device transmits at least two CSI-RS resources by using the spatial domain transmission filter.
- the sending of the M CSI-RSs by the first terminal device to the second terminal device using a spatial transmission filter may refer to: the sending of the M CSI-RSs by the first terminal device using a different spatial transmission filter - RSs, for example, the M CSI-RSs correspond to different transmission beams; or, the first terminal device does not use the same spatial domain transmission filter to transmit the M CSI-RSs, for example, transmits the M CSI-RSs CSI-RS uses at least two different transmit beams.
- the sending of the M CSI-RSs to the second terminal device by the first terminal device using a spatial transmission filter may include:
- the first terminal device transmits M CSI-RSs to the second terminal device by using M spatial transmission filters, where each spatial transmission filter corresponds to one CSI-RS.
- the sending of the M CSI-RSs to the second terminal device by the first terminal device using a spatial transmission filter may include:
- the first terminal device transmits M CSI-RSs to the second terminal device using K spatial domain transmission filters, where K is less than M and K is greater than 1, that is, there are at least two CSI-RSs among the M CSI-RSs - RS is transmitted through different spatial domain transmit filters.
- the terminal device may use a beam for sidelink data transmission.
- the transmitting terminal may determine a transmitting beam suitable for the receiving terminal to improve sidelink transmission performance.
- the first terminal device when used as the transmitting terminal, it can transmit the side-going reference signal through different transmitting beams.
- the receiving-end terminal can measure the side-going reference signal sent by the transmitting terminal, and select the optimal measurement result corresponding to The optimal transmit beam is further fed back to the receiving terminal, so that the transmitting terminal performs subsequent lateral transmission according to the optimal transmitting beam fed back by the receiving terminal, thereby improving transmission performance.
- there is a corresponding relationship between the transmission beam and the reference signal resource The receiving terminal selects the transmission beam corresponding to the optimal measurement result, and feeds back the reference signal resource information corresponding to the transmission beam to the transmitting terminal.
- the transmitting terminal according to The reference signal resource information and the corresponding relationship can determine the optimal transmission beam.
- the corresponding repetition (repetition) field in the configuration information of the target CSI-RS resource set takes a first value, where the first value is used to indicate that the first terminal device does not use the same
- the spatial domain transmission filter transmits the CSI-RS resources in the target CSI-RS resource set, in other words, the first value is used to instruct the first terminal device to use a different spatial domain transmission filter to transmit the target CSI-RS CSI-RS resources in the resource set.
- the first value may be off (off), indicating that the first terminal device transmits the M CSI-RSs for selecting a target airspace transmission filter.
- the first terminal device when the first terminal device works in the first mode, the first terminal device may send the CSI-RS based on the sidelink transmission resource allocated by the network device; when the first terminal device works in the second mode The first terminal device may determine the transmission resource for sending the CSI-RS based on the interception result, where, for the working principles of the first mode and the second mode, refer to the relevant descriptions of the foregoing embodiments.
- the method 200 further includes:
- the first terminal device sends first indication information to a network device, where the first indication information is used to instruct the first terminal device to request the network device to allocate a transmission resource for sending a CSI-RS.
- the first indication information is carried in resource request information, and the resource request information is used to request a sidelink transmission resource from a network device.
- the first terminal device works in the first mode, and when the first terminal device determines that it needs to send CS-RS to determine the optimal transmission beam, it sends resource request information to the network device, and the resource request information carries The first instruction message.
- the fact that the first terminal device needs to send CSI-RS may refer to that the first terminal device needs to send multiple CSI-RSs, or that the first terminal device needs to send CSI-RSs through different sending beams.
- the first terminal device may periodically send the CSI-RS, so that the second terminal device may perform periodic measurement. Therefore, the first indication information may be used to indicate that the first terminal device needs to periodically send a CSI-RS, or that the first terminal device requests periodic sidelink resources.
- the first indication information may further include period information for sending the CSI-RS by the first terminal device. Therefore, the network device can allocate periodic sidelink resources to the first terminal device according to the first indication information.
- the first indication information may further include the value of M.
- the network device can respectively allocate corresponding sidelink transmission resources for the first terminal device to send the M CSI-RSs.
- the resource request information may include but not limited to at least one of the following:
- SR Scheduling Request
- BSR Buffer Status Report
- the first indication information may be sent through any uplink channel or signaling.
- physical uplink control channel Physical Uplink Control Channel, PUCCH
- uplink radio resource control Radio Resource Control, RRC
- the method further includes:
- the first terminal device receives first configuration information sent by a network device, where the first configuration information includes transmission resources allocated by the network device to the first terminal device for sending CSI-RS.
- the first configuration information includes second indication information
- the second indication information is used to indicate that the sidelink side transmission resource allocated by the network device is used to transmit the information used to select the target airspace transmission filter.
- the CSI-RS or, the second indication information is used to indicate that the sidelink transmission resource allocated by the network device is used for sending the CSI-RS by the first terminal device.
- the network device may allocate sidelink transmission resources to the first terminal device by means of dynamic resource allocation, or allocation of a sidelink configuration grant (Configure Grant, CG).
- CG sidelink configuration grant
- Allocating, by the network device, the sidelink transmission resource of the sidelink configuration grant to the first terminal device may be: the network device allocates the periodic sidelink transmission resource to the first terminal device. In this way, the first terminal device may periodically send the CSI-RS to the second terminal device by using the periodic resource authorized by the sideline configuration.
- the network device when the network device allocates the periodic resources of the sidelink configuration grant to the first terminal device, only one sidelink transmission resource is included in each period.
- the network device may allocate sidelink transmission resources to the first terminal device through the DCI, and in this case, the allocated sidelink resources are dynamic resources.
- the network device may allocate sidelink transmission resources to the first terminal device through RRC signaling, and in this case, the allocated sidelink resources may be Type 1 (Type-1) sidelink configuration grants.
- the network device may allocate sidelink transmission resources to the first terminal device through RRC signaling and DCI, and in this case, the allocated sidelink resources may be Type-2 (Type-2) sidelink configuration grants.
- the second indication information is carried by at least one of the following signalings: DCI, RRC signaling.
- the embodiment of the present application does not limit the manner in which the second indication information is carried in signaling.
- the second indication information is carried by DCI
- the second indication information is carried in the information field of the DCI, for example, the DCI is carried in the DCI by adding an information field or multiplexing an existing information field
- the second indication information, or, the second indication information is carried by a radio network temporary identifier (Radio Network Temporary Identity, RNTI) that generates a scrambling sequence of information bits of the scrambled DCI.
- RNTI Radio Network Temporary Identity
- the first terminal device determines the target CSI-RS according to the resource pool configuration information or the first CSI-RS resource set included in the sidelink bandwidth part (Band Width Part, BWP) configuration information A resource set, determining the CSI-RS resources included in the target CSI-RS resource set according to the CSI-RS resources included in the first CSI-RS resource set.
- BWP sidelink bandwidth part
- the resource pool configuration information or side BWP configuration information includes CSI-RS resource set (CSI-RS-ResourceSet) configuration information and/or CSI reporting configuration information.
- CSI-RS-ResourceSet CSI-RS resource set
- the CSI-RS resource set configuration information includes one or more of the following parameters:
- CSI-RS resource set identifier (CSI-RS-ResourceSetId);
- CSI-RS resource configuration information (CSI-RS-Resource);
- Parameter repetition (repetition) configuration information for example, the value is off (off) or on (on);
- Indication information for determining the time-domain symbol where the first CSI-RS resource is located for example, indicated by the time-domain symbol index in the time slot;
- RE Resource Element
- PRB physical resource block
- the transmitting terminal When the transmitting terminal sends indication information to the receiving terminal, indicating that the CSI-RS resource in the CSI-RS resource set whose repetition is off is to be transmitted, the receiving terminal may assume that the transmitting terminal does not use the same transmission beam to transmit CSI-RS Therefore, the receiving terminal can measure according to the CSI-RS, and report or feed back CSI to the transmitting terminal, so that the first terminal can determine the target transmission beam according to the CSI reporting or feedback.
- the receiving terminal may assume that the transmitting terminal uses the same transmission beam to transmit the CSI-RS resources. Therefore, the receiving terminal The terminal may use different receiving beams for reception, measure the CSI-RS, and determine the receiving beam according to the measurement result.
- the CSI reporting configuration information includes one or more of the following parameters:
- CSI report configuration identifier (CSI-ReportConfigId);
- the CSI-RS resource set identifier (CSI-RS-ResourceSetId) is used for associating the CSI-RS resource set with the amount of CSI reporting.
- the amount of CSI reporting may include indication information of the CSI-RS resources that the receiving terminal selects to report and/or measurement results of the CSI-RS resources that the receiving terminal selects to report.
- the indication information of the CSI-RS resource may be direct indication information of the CSI-RS resource, such as a resource index of the CSI-RS resource, or may be indirect indication information of the CSI-RS resource, such as , transmission resource information corresponding to the CSI-RS resource, and the like.
- the transmission resource information corresponding to the CSI-RS resource may refer to resource information for transmitting the CSI-RS resource, for example, time slot information for transmitting the CSI-RS resource.
- the measurement results of CSI-RS resources may include but not limited to at least one of the following:
- RSRP Reference Signal Receiving Power
- RSRQ Reference Signal Receiving Quality
- SINR Signal to Interference plus Noise Ratio
- the CSI reporting amount may include but not limited to at least one of the following:
- CSI-RS Resource Indicator CRI
- CRI and Reference Signal Receiving Power Reference Signal Receiving Power
- RSRP Reference Signal Receiving Power
- SINR Signal to Interference plus Noise Ratio
- slot resource indication slot resource indication and RSRP, slot resource indication and SINR, do not report or empty ('none').
- the CRI may be a resource index of a CSI-RS resource.
- the time slot resource indication may be used to indicate the time slot information corresponding to the CSI-RS resource selected by the receiving end terminal of the CSI-RS resource.
- the first terminal device sends a CSI-RS resource in a time slot, and when the second terminal device receives the CSI-RS resource, it can know the time slot information of the first terminal device sending the CSI-RS resource, if If the second terminal device chooses to report or feed back the CSI-RS resource, it can feed back the time slot information corresponding to the CSI-RS resource. In this way, the first terminal device can determine the CSI corresponding to the time slot information based on the time slot information. -RS resources.
- the resource pool configuration information or side BWP configuration information further includes one or more of the following parameters:
- the number of antenna ports for example, the number of antenna ports indicating the CSI-RS is ⁇ 1,2,4,8 ⁇ , etc.;
- the CSI-RS density is used to indicate the number of REs occupied by the CSI-RS of each antenna port in each PRB. If the density is 2, it means that in each PRB, the CSI-RS of each antenna port occupies 2 REs.
- the resource pool configuration information or side BWP configuration information may further include PRB information used to indicate the CSI-RS resource mapping.
- PRB information used to indicate the CSI-RS resource mapping.
- the density is 0.5, that is, when each antenna port occupies 1 RE in every 2 PRBs
- the resource pool configuration information or sideline BWP configuration information may also include PRB information that maps a CSI-RS resource in every 2 PRBs , such as mapping CSI-RS resources on odd (or even) PRBs.
- the value of the repetition field of the CSI-RS resource set may indicate the use of the CSI-RS resource set, for example, whether it is used to determine a target transmission beam or a target reception beam.
- the transmitting terminal when determining a target transmission beam, may use a CSI-RS resource set with repetition set to off, and when determining a target receiving beam, the transmitting terminal may use a CSI-RS resource set with repetition being on.
- the resource pool configuration information or the side BWP configuration information includes configuration information of the first CSI-RS resource set and configuration information of the second CSI-RS resource set. Wherein, the repetition of the first CSI-RS resource set is off, and the repetition of the second CSI-RS resource set is on.
- the first terminal device can use the first CSI-RS resource set, for example, the first terminal device can use different transmission beams to respectively transmit the M CSIs in the first CSI-RS resource set -RS resources, the second terminal device measures the received CSI-RS resources respectively, and reports or feeds back the CSI according to the measurement results, and the first terminal device selects the target transmission beam according to the CSI report or feedback of the second terminal device .
- the first terminal device may use the second set of CSI-RS resources. For example, the first terminal device uses the same transmission beam to respectively transmit the M CSI-RS resources in the second CSI-RS resource set, and the second terminal device uses different reception beams to receive and measure the CSI-RS resources , according to the measurement results to select the target receiving beam.
- the usage of the CSI-RS resource set may be indicated through the configuration of the CSI reporting amount corresponding to the CSI-RS resource set, for example, whether it is used to determine a target transmission beam or a target reception beam. For example, when determining the target transmission beam, the transmitting terminal uses a CSI-RS resource set whose CSI reporting amount is not 'none', and when determining the target receiving beam, the transmitting terminal uses a CSI-RS resource set whose CSI reporting amount is 'none' .
- the resource pool configuration information or the side row BWP configuration information configures two CSI-RS resource sets, and configures the CSI reporting amount associated with the CSI-RS resource set, and the CSI report amount associated with the first CSI-RS resource set
- the CSI reporting quantity is 'cri-RSRP'
- the CSI reporting quantity associated with the second CSI-RS resource set is 'none'.
- the first terminal device when the first terminal device indicates to the second terminal device that the amount of CSI reporting is 'cri-RSRP', it means that the first terminal device will send the CSI-RS resources in the first CSI-RS resource set.
- the second terminal device may assume that the first terminal device uses a different transmission beam to transmit CSI-RS resources. Therefore, the second terminal device measures the CSI-RS resources and performs CSI reporting or feedback, so that the first terminal device can be based on CSI reporting or feedback determines the target transmission beam.
- the first terminal device When the first terminal device indicates to the second terminal device that the amount of CSI reporting is 'none', it means that the first terminal device will send the CSI-RS resources in the second CSI-RS resource set.
- the second terminal The device may assume that the first terminal device uses the same transmit beam to transmit CSI-RS resources, therefore, the second terminal device may use different receive beams to receive the CSI-RS resources respectively, and measure the CSI-RS resources, and select The target receives the beam.
- both the first terminal device and the second terminal device may obtain the resource pool configuration information or sideline BWP configuration information. That is, the first terminal device and the second terminal device have the same understanding of the CSI-RS resource configuration information.
- the first terminal device when the first terminal device transmits the CSI-RS to the second terminal device using a spatial transmission filter, the first terminal device carries the SCI associated with the CSI-RS with the CSI-RS resource indication information corresponding to the above CSI-RS.
- the first terminal device when the first terminal device transmits the CSI-RS to the second terminal device each time using the airspace transmission filter, the first terminal device carries the CSI-RS in the SCI associated with the CSI-RS Corresponding CSI-RS resource indication information, for example, index information of the CSI-RS resource.
- the first terminal device may indicate the CSI-RS resource corresponding to the CSI-RS to the second terminal device through the SCI associated with the CSI-RS.
- the method 200 further includes:
- the first terminal device sends first side row configuration information to the second terminal device.
- the first side line configuration information is used to indicate at least one of CSI-RS resource sending configuration, CSI-RS resource receiving configuration, and CSI-RS resource reporting or feedback configuration.
- the second terminal device can learn the configuration used by the sending terminal terminal to send the CSI-RS resource according to the first side row configuration information, and/or the configuration used by the receiving terminal terminal to receive the CSI-RS resource, and/or, receive The configuration used by the end terminal for CSI reporting or feedback.
- the first terminal device sends the first sideline configuration information to the second terminal device, so that the second terminal device can know the sending configuration and/or receiving configuration of the CSI-RS, and can further perform a CSI-RS based on the sending configuration and/or receiving configuration.
- the detection and measurement of the CSI-RS resource selects the reported or fed back CSI-RS resource according to the measurement result combined with the reported or fed back configuration, so as to realize the selection process of the target transmission beam.
- the first side row configuration information includes but is not limited to at least one of the following:
- the index of the target CSI-RS resource set, the index of the CSI-RS resource included in the target CSI-RS resource set, the number of CSI-RS resources included in the target CSI-RS resource set, the M The value of , the corresponding relationship between the CSI-RS resource set and the CSI reporting amount, the number of CSI-RS resources reported or fed back by the second terminal device to the first terminal device, the delay boundary, the target CSI-
- the value of the repetition field corresponding to the RS resource set, the first terminal device sends the transmission resource information used by the M CSI-RSs, the resource pool information corresponding to the transmission resources used by the M CSI-RSs, the transmission mode of the first terminal device;
- the repetition field corresponding to the target CSI-RS resource set takes the first value to indicate that the first terminal device does not use the same spatial domain transmission filter to transmit CSI-RS, and the target CSI-RS resource set corresponds to The second value of the repetition field is used to indicate that the first terminal device uses the same spatial domain transmission filter to transmit the CSI-RS.
- the first sidelink configuration information may be configured through any sidelink information or sidelink signaling.
- the first sidelink configuration information is carried by one of the following: sidelink control information (Sidelink Control Information, SCI), media access control control element (Media Access Control Control Element, MAC CE), PC5-RRC signal make.
- the first terminal device when the first sidelink configuration information is carried by SCI or MAC CE, the first terminal device indicates activation of sidelink feedback.
- the second terminal device can know which CSI-RS resource in which CSI-RS resource set the first terminal device will send. Further, it can be determined whether the CSI-RS resources in the target CSI-RS resource set are used to determine the target transmission beam or to determine the target reception beam in combination with the value of the repetition field corresponding to the target CSI-RS resource set or the CSI reporting amount . For example, when the target CSI-RS resource set is used to determine a target transmission beam, the second terminal device may use the same reception beam to receive the CSI-RS resources transmitted by the first terminal device. For another example, when the target CSI-RS resource set is used to determine a target receiving beam, the second terminal device may use a different receiving beam to receive the CSI-RS resources sent by the first terminal device.
- the index of the CSI-RS resources included in the target CSI-RS resource set may be the index of all the CSI-RS resources included in the target CSI-RS set, or may also be the The index of the CSI-RS resource actually sent by the first terminal device, for example, the index of multiple CSI-RS resources corresponding to the M CSI-RS.
- the second terminal device can know the CSI to be sent (possibly sent) by the first terminal device - RS resource, further, the CSI-RS resource can be measured and reported.
- the value of the repetition field corresponding to the target CSI-RS resource set may be used by the second terminal device to determine the CSI-RS resource to be transmitted by the first terminal device for determining the target transmission
- the beam is also the target receiving beam.
- the detection and measurement of the CSI-RS resources may be performed in a corresponding manner. For example, when the value of the repetition field corresponding to the target CSI-RS resource set is the first value (for example, the value is off), the second terminal device can use the same receiving beam to receive the CSI-RS resource sent by the first terminal device . For another example, when the value of the repetition field corresponding to the target CSI-RS resource set is the second value (for example, the value is on), the second terminal device may use a different receiving beam to receive the CSI-RS transmitted by the first terminal device. resource.
- the first side row configuration information may also include at least one CSI-RS resource set among multiple CSI-RS resource sets in the resource pool configuration information or the side row BWP configuration information.
- the resource pool configuration information or side BWP configuration information configures A CSI-RS resource sets, and each CSI-RS resource set includes at least one CSI-RS resource, where A is a positive integer.
- the first side line configuration information may include at least one CSI-RS resource set in the A CSI-RS resource sets.
- the first side line configuration information may further include at least one CSI-RS resource in each CSI-RS resource set in the at least one CSI-RS resource set.
- the number of CSI-RS resources in each CSI-RS resource set included in the first side row configuration information may be the same, or may also be different.
- the first side row configuration includes P resources in the first CSI-RS resource set and Q resources in the second CSI-RS resource set, where P and Q can be the same, or can also be different .
- the resource pool configuration information configures A sets of CSI-RS resources
- the transmitting terminal sends the first side configuration information to the receiving terminal
- the first side configuration information includes the index of the CSI-RS resource set
- the receiving terminal can determine the corresponding CSI-RS resource set through the index of the CSI-RS resource set.
- the CSI-RS resource set includes B CSI-RS resources
- the transmitting terminal can select K CSI-RS resources from the CSI-RS resource set, and use the K CSI-RS resources
- the CSI-RS resource set includes 16 CSI-RS resources.
- the maximum number of transmitting beams supported by the transmitting terminal is 4.
- the transmitting terminal can Select 4 CSI-RS resources from the 16 CSI-RS resources included in the CSI-RS resource set, and send the information of the 4 CSI-RS resources to the receiving terminal, so that the transmitting terminal and the receiving terminal
- the transmission configuration of the CSI-RS resource has the same understanding.
- the receiving terminal When the receiving terminal reports or feeds back the CSI-RS resource to the transmitting terminal, it can report the resource index information corresponding to the CSI-RS resource, such as using 2 bits to represent the CSI-RS resource index, where 00 corresponds to the CSI-RS resource set The CSI-RS resource with the lowest index, 01 corresponds to the CSI-RS resource with the second lowest index in the CSI-RS resource set, and so on.
- the number of CSI-RS resources included in the target CSI-RS resource set may refer to the number of all CSI-RS resources included in the target CSI-RS set, or may also be the The number of CSI-RS resources actually sent by the first terminal device, for example, the number of multiple CSI-RS resources corresponding to the M CSI-RSs.
- the first terminal device indicates to the second terminal device the number of CSI-RS resources included in the target CSI-RS resource set or the value of M, so that the second terminal device can -
- the number of RS resources or the value of M determines the bit length corresponding to each CSI-RS resource index when performing CSI reporting or feedback.
- the bit length for feeding back a CSI-RS resource index may be ceil(log 2 M).
- the first terminal device may also configure the correspondence between the CSI-RS resource set and the CSI reporting amount for the second terminal device.
- the CSI report configuration information includes the CSI-RS resource set identification information (CSI-RS-ResourceSetId) or CSI-RS resource configuration identification information (CSI-ResourceConfigId), which is used to correlate the CSI report amount and
- the CSI-RS resource set for another example, includes CSI report configuration identification information (CSI-ReportConfigId) in the configuration information (CSI-RS-ResourceSet) or CSI-RS resource configuration information (CSI-ResourceConfig) of the CSI-RS resource set,
- the embodiment of the present application does not limit the association manner of the two.
- the latency boundary may be referenced to the first time slot, for example, the first time slot is the time slot where the first sidelink configuration information is located.
- the delay boundary may be a time slot offset, where the time slot offset is relative to the time slot where the first sideline configuration information is located.
- the first terminal device does not expect the second terminal device to report or feed back the CSI-RS resources. In other words, the first terminal device does not expect the second terminal device to perform CSI reporting or feedback within the delay boundary.
- the second terminal device after exceeding the delay boundary, is allowed to report or feed back the CSI-RS resource. In other words, after exceeding the delay boundary, the second terminal device may perform CSI reporting or feedback.
- the second terminal device does not expect the first terminal device to send CSI-RS resources for determining a spatial domain transmission filter.
- the second terminal device stops receiving the CSI-RS resource sent by the first terminal device and used for determining the spatial transmission filter. In other words, after exceeding the delay boundary, the first terminal device stops sending the CSI-RS resource used for determining the spatial domain transmission filter.
- the second terminal device may not be able to know the number of transmission beams used by the first terminal device, or the number of CSI-RS resources to be transmitted by the first terminal device (for example, the transmitting terminal does not transmit to the receiving terminal value of M), in this case, the second terminal device may determine the time to perform CSI-RS measurement and feedback according to the delay boundary. For example, when the delay boundary is exceeded, it means that the first terminal device will no longer send the CSI-RS, and at this time, the second terminal device may perform measurement and feedback based on the detected CSI-RS.
- the first terminal device uses four transmit beams (transmit beam 0 to transmit beam 3) to transmit CSI-RS resources respectively, and the first terminal device transmits the first Sideline configuration information, the delay boundary indicated by the first sideline configuration information is 10 time slots, that is, the first terminal device sends CSI-RS resources in turn before time slot 10, and the second terminal device sends CSI-RS resources after time slot 10 Carry out CSI-RS reporting or feedback.
- the transmission resource information used by the first terminal device to send the M CSI-RSs is used to indicate the transmission resources used by the first terminal device to send the M CSI-RSs.
- the network device allocates transmission resources on four time slots of time slot 3, time slot 5, time slot 6 and time slot 8 to the first terminal device, and the first terminal device sends CSI- RS resources, and use different transmission beams to transmit CSI-RS resources in different time slots.
- the first sideline configuration information may include transmission resources on time slot 3, time slot 5, time slot 6, and time slot 8, and after receiving the first sideline configuration information, the second terminal device may, in this CSI-RS detection and measurement are performed on the transmission resources of the four time slots, and CSI reporting or feedback is performed after the time slot 10, for example, in the time slot 12.
- the transmission resource information used by the M CSI-RSs sent by the first terminal device may be configured by the network device, or may be independently selected.
- the transmission resource information used by the first terminal device to send the M CSI-RS resources may be configured by the network device through the aforementioned first configuration information.
- the transmission resource information used by the M CSI-RS sent by the first terminal device may be a periodic transmission resource, or may also be a single-use transmission resource, which is not discussed in this application. limited.
- the first terminal device sends the transmission resources used to send the CSI-RS to the second terminal device, so that the second terminal device can know which transmission resources the first terminal device will send the CSI-RS on, and can transmit the CSI-RS on the transmission resources. Reception of the CSI-RS is performed.
- the transmission resource information used by the first terminal device to send the M CSI-RSs may include period information and/or transmission resource information within one period.
- the sender terminal when the sender terminal works in the second mode, the sender terminal acquires sidelink transmission resources based on interception, however mechanisms such as re-evaluation and pre-emption may result in
- the sending terminal needs to perform resource reselection.
- the receiving terminal cannot accurately know the transmission resources selected by the transmitting terminal.
- the CSI-RS sent by the transmitting terminal may not be received by the receiving terminal, such as the influence of half-duplex, or the SCI detection failure, or the receiving terminal cannot detect it because the transmitting beam is not aligned with the receiving terminal.
- the receiving terminal may not be able to acquire all the CSI-RS transmitted by the transmitting terminal.
- the sidelink transmission resources of the transmitting terminal are allocated by the network equipment, and the sidelink transmission resources are usually not preempted by other terminals.
- the transmitting terminal can transfer the network
- the sidelink transmission resources allocated by the device for sending CSI-RS are sent to the receiving terminal, so that the receiving terminal can also know the transmission resources used by the sending terminal to send CSI-RS, and further can use these transmission resources Perform CSI-RS detection and measurement.
- the system can configure multiple resource pools, and the network device can allocate sidelink transmission resources in the multiple resource pools for the first terminal device working in the first mode.
- the first terminal device When indicating the transmission resource information used to send the CSI-RS to the second terminal device, the resource pool information corresponding to the transmission resource information can be notified to the second terminal device, so that the second terminal device can determine whether the transmission resource information corresponds to The transfer resource in which resource pool.
- the resource pool information corresponding to the transmission resources used by the M CSI-RSs may be index information corresponding to the resource pool.
- the first terminal device may indicate to the second terminal device the transmission mode of the first terminal device, such as the first mode, the second terminal device may consider that the transmission resources of the first terminal device will not change, Even if the second terminal device does not detect the SCI on the transmission resource indicated by the first terminal device, the second terminal device may also perform CSI-RS resource measurement on the transmission resource. It is beneficial to ensure that the second terminal device obtains the measurement results of all CSI-RS sent by the first terminal device, and can avoid that the second terminal device does not detect the SCI correctly, resulting in the inability to know the receiving configuration of the CSI-RS, and thus unable to perform corresponding measurements question.
- the content indicated by the first side row configuration information may be sent through the same message or signaling, or may also be sent through different messages or signaling, which is not limited in this application.
- the present application does not limit the type of signaling.
- the first side row configuration information is sent through two signalings, wherein the first signaling is PC5-RRC signaling, and the second signaling is SCI; or, both signalings are PC5-RRC signaling.
- the method 200 further includes:
- the first terminal device sends third indication information to the second terminal device
- the third indication information is used to indicate at least one of the following:
- the first terminal device will send the CSI-RS used to select the target airspace transmission filter, the first terminal device will use different airspace transmission filters to send the CSI-RS, the channel state information CSI reporting amount, the first The index of the first CSI-RS resource sent by a terminal device, the time interval for sending the first CSI-RS resource by the first terminal device, wherein the time interval is the time unit where the third indication information is located for reference.
- the third indication information may be configured through any sidelink information or sidelink signaling.
- the third indication information is carried by one of the following: PC5-RRC signaling, SCI, MAC CE, sidelink feedback information, such as Physical Sidelink Feedback Channel (Physical Sidelink Feedback Channel, PSFCH).
- PC5-RRC signaling SCI
- MAC CE MAC CE
- sidelink feedback information such as Physical Sidelink Feedback Channel (Physical Sidelink Feedback Channel, PSFCH).
- the first terminal device when the third indication information is carried by SCI or MAC CE, the first terminal device indicates activation of sidelink feedback.
- the first terminal device may notify the second terminal device that the first terminal device will send the CSI-RS, or that the CSI for selecting the target airspace transmission filter will be sent.
- -RS or the CSI-RS will be transmitted using different spatial transmission filters, so that the second terminal device can perform CSI-RS resource measurement and Report to realize the selection process of the target transmission beam.
- the sending configuration, receiving configuration and reporting configuration of the CSI-RS may be configured in the first side line configuration information, or may also be configured in the third indication information, for example, the first terminal device is configured in When the CSI-RS needs to be sent, third indication information is sent to the second terminal device, where the third indication information is used to indicate at least one of the sending configuration, receiving configuration and reporting configuration of the CSI-RS.
- part or all of the first side configuration information may be indicated by the third indication information.
- the content indicated by the first side configuration information and the third indication information may be indicated by the same information. signaling, or may also be carried by different signaling.
- the first terminal device sends the CSI-RS resources in a certain order starting from the CSI-RS resource corresponding to the resource index of the first sent CSI-RS resource, and correspondingly, the second The terminal device receives the CSI-RS resources in a certain order starting from the CSI-RS resource corresponding to the resource index of the first sent CSI-RS resource.
- the order may be the order of resource indexes from small to large, or may be the order of resource indexes from large to small.
- the target CSI-RS resource set includes 8 CSI-RS resources, and when the index of the first transmitted CSI-RS resource is resource index 2, it means that the first terminal device will start from the CSI-RS resource corresponding to the CSI-RS resource index 2.
- the CSI-RS resources start to send the CSI-RS resources sequentially, that is, first send the CSI-RS resources corresponding to the CSI-RS resource index 2, and then send the CSI-RS resources corresponding to the CSI-RS resource index 3, and so on, when After sending the CSI-RS resource corresponding to the CSI-RS resource index 7, then send the CSI-RS resource corresponding to the CSI-RS resource index 0 and the CSI-RS resource corresponding to the CSI-RS resource index 1.
- the second terminal device When the second terminal device knows the order of the CSI-RS resources to be sent by the first terminal device and the transmission resource of the CSI-RS to be sent by the first terminal device, even if the second terminal device does not correctly receive the CSI-RS resource sent on the transmission resource SCI, the second terminal device can also perform CSI-RS detection and measurement on this transmission resource, which is beneficial to ensure that the second terminal device obtains all the CSI-RS measurement results sent by the first terminal device, and can prevent the second terminal device from failing to The correct detection of the SCI results in the inability to know the receiving configuration of the CSI-RS, and thus the inability to perform corresponding measurements.
- the first terminal device when the first terminal device does not send the index information of the first sent CSI-RS resource to the second terminal device, by default, the first terminal device selects the index information of the first CSI-RS resource in the CSI-RS resource set.
- the RS resource index (such as resource index 0 or the CSI-RS resource corresponding to the lowest resource index) starts to be sent.
- the time interval for the first terminal device to send the first CSI-RS resource may be based on the time unit where the third indication information is located, and the second terminal device receives the first CSI-RS resource of the first terminal device After the third indication information, the time unit and the time interval of the third indication information can be known, so that the time unit for sending the first CSI-RS resource by the first terminal device can be determined, and the CSI-RS resource can be received at the time unit .
- the third indication information may be used to indicate the time slot interval for the first terminal device to send the first CSI-RS resource, and the time slot interval is based on the time slot where the third indication information is located.
- the information indicated by the third indication information may be sent through the same message or signaling, or may also be sent through different messages or signaling.
- the method 200 further includes:
- the first terminal device sends fourth indication information to the second terminal device
- the fourth indication information is used to indicate that the CSI-RS sent by the first terminal device is used to select a spatial domain transmission filter for the first terminal device to transmit sidelink data; or, the fourth The indication information is used to indicate that the CSI-RS sent by the first terminal device is used to select a spatial domain receiving filter for the second terminal device to receive sidelink data; or, the fourth indication information is used to indicate the The CSI-RS sent by the first terminal device is used to measure channel state information.
- the fourth indication information may be configured through any sidelink information or sidelink signaling.
- the fourth indication information is carried by one of the following: PC5-RRC signaling, SCI, MAC CE, sidelink feedback information, such as PSFCH.
- the first terminal device when the fourth indication information is carried by SCI or MAC CE, the first terminal device indicates activation of sidelink feedback.
- the channel state information may include but not limited to at least one of the following:
- CQI Channel Quality Indicator
- RI Rank Indication
- PMI Precoding Matrix Indicator
- the third indication information may be used to indicate that the first terminal device will send a CSI-RS resource
- the first terminal device may indicate the first terminal device through the fourth indication information
- the purpose of the CSI-RS resources to be transmitted by a terminal device for example, to determine the target transmission beam or to determine the target reception beam, so that the second terminal device can detect the CSI-RS resources in a corresponding manner based on the fourth indication information and feedback.
- the second terminal device may use the same receive beam to receive the CSI-RS resource sent by the first terminal device.
- the second terminal device may use a different receiving beam to receive the CSI-RS resource sent by the first terminal device.
- the method 200 further includes:
- the second terminal device measures the CSI-RS sent by the first terminal device, and determines first information to report or feed back to the second terminal device according to the measurement result.
- the second terminal device sends the first information to the first terminal device.
- the first terminal device receives the first information sent by the second terminal device.
- the first information includes a target CSI reporting amount
- the target CSI reporting amount includes at least one of the following:
- the time slot resource indication information is used to determine the time slot corresponding to the CSI-RS sent by the first terminal device, or the time slot resource indication information is used to determine the CSI-RS sent by the first terminal device The index corresponding to the resource.
- the receiving of the first information sent by the second terminal device by the first terminal device includes:
- the first terminal device receives the first information sent by the second terminal device in a first time unit, where the first time unit is located after a second time unit determined based on a delay boundary.
- the CRI may be an index of a CSI-RS resource.
- the second terminal device may only Feedback the index of the CSI-RS resource; for another example, when the CSI reporting amount indicated by the first side configuration information or the third indication information is CRI-RSRP, the second terminal device may feed back the CSI-RS resource index Index and RSRP; for another example, when the CSI reporting amount indicated by the first side configuration information or the third indication information includes CRI-SINR, the second terminal device may feed back the index and SINR of the CSI-RS resource.
- the CSI-RS resource may also be indicated by a time slot resource, and for a specific indication manner, refer to the relevant description of the foregoing embodiments.
- the target CSI reporting amount may be determined by the second terminal device according to a measurement result obtained by measuring the received CSI-RS.
- the measurement results (including RSRP and/or SINR) in this application are obtained based on the measurement of CSI-RS.
- the measurement result is obtained based on the measurement of PSCCH DRMS, PSSCH DMRS or sideline PT-RS.
- the CSI-RS sent by the sender is carried in the PSSCH, that is, the CSI-RS is mapped in the resources of the PSSCH, the PSSCH is scheduled through the SCI, and the transmission of the CSI-RS is indicated.
- the receiver can perform measurements based on PSCCH DMRS or PSSCH DMRS. That is, the CSI-RS resources may also be determined based on the measurement results of the PSCCH DMRS or PSSCH DMRS associated with the CSI-RS.
- the sending end indicates to send the CSI-RS through the indication information
- the receiving end measures the PSCCH DMRS or PSSCH DMRS associated with the CSI-RS
- the measurement result is PSCCH-RSRP or PSSCH-RSRP, based on the measurement result Determine the CSI-RS resource, and send the CSI-RS resource index, or the CSI-RS resource index and its associated measurement results (ie, PSCCH-RSRP or PSSCH-RSRP) to the sender to assist the sender in selecting the airspace transmission filter device.
- the measurement results obtained based on CSI-RS are taken as an example for illustration, and the embodiments of the present invention are also applicable to the measurement results obtained based on PSCCH DMRS or PSSCH DMRS Condition.
- the first information includes indexes of N CSI-RS resources, or, the first information is used to determine indexes of N CSI-RS resources, and the N CSI-RS resources are the indexes of the second terminal Determined by the device according to the measurement result obtained by measuring the received CSI-RS, N is the number of CSI-RS resources that the second terminal device needs to feed back or report, N is a positive integer, and N ⁇ M.
- the second terminal device may send indication information to the first terminal device, which is used to indicate the number of CSI-RS resource information (or CSI-RS resource indexes) fed back by the second terminal device.
- the indexes of the N CSI-RS resources are arranged according to the order of the measurement results corresponding to the N CSI-RS resources from high to low, or, the indexes of the N CSI-RS resources are arranged according to the order of the N CSI-RS resources
- the measurement results corresponding to the CSI-RS resources are arranged in descending order.
- N 1, that is, the second terminal device only needs to feed back one CSI-RS resource index. In this case, it only needs to feed back the CSI-RS with the best measurement result.
- the index may determine that the corresponding transmit beam is the target transmit beam.
- the second terminal device does not need to feed back the measurement result.
- the second terminal device may also only feed back CSI-RS resource information, and at this time, the fed back CSI-RS resource information is arranged in descending order of measurement results.
- N 3, that is, three CSI-RS resource information needs to be fed back, namely CSI-RS resource 1, CSI-RS resource 2, and CSI-RS resource 3, and the corresponding RSRP measurement results are -30dBm and -10dBm respectively , -20dBm
- the feedback CSI-RS resource information is shown in Figure 14, that is, the CSI-RS resource with the best measurement result is at the top, followed by the CSI-RS resource with the suboptimal measurement result, and so on. It may also be that the CSI-RS resource with the best measurement result is last, followed by the CSI-RS resource with the second best measurement result, and so on, as shown in FIG. 15 .
- the first information further includes first measurement information, and the first measurement information is used to indicate measurement results corresponding to the N CSI-RS resources.
- the second terminal device feeds back indices of N CSI-RS resources and corresponding measurement results.
- the first terminal device when the first terminal device needs to switch the spatial domain transmission filter, it can quickly select and switch from the N spatial domain transmission filters corresponding to the N CSI-RS resources fed back by the second terminal device, and There is no need for the first terminal device to perform the process of selecting the optimal spatial domain transmission filter again.
- the transmitting terminal needs to re-determine Optimal spatial domain transmit filter. If the receiving terminal only feeds back one CSI-RS resource, when the link fails, the transmitting terminal needs to re-execute the process of selecting the optimal spatial transmission filter, so as to re-determine a new optimal spatial transmission filter.
- the receiving end terminal feeds back N CSI-RS resources
- the airspace transmission filter selected by the transmitting end terminal fails, it can be selected from the airspace transmission filters corresponding to the remaining N-1 CSI-RS resources fed back by the receiving end terminal
- One performs sidelink transmission such as selecting the CSI-RS resource corresponding to the suboptimal measurement result, and then determining the spatial domain transmission filter corresponding to the CSI-RS resource. In this way, the process of reselecting the optimal airspace transmit filter is avoided, and the speed of airspace transmit filter reselection or beam failure recovery (beam failure recovery) is improved.
- the transmitting terminal can have a higher probability of selecting one airspace transmission filter to simultaneously transmit sidelink data to multiple receiving terminals.
- the transmitting terminal supports 4 transmit airspace transmit filters, corresponding to the airspace transmit filters 0-3 respectively.
- the receiving end terminal 1 only feeds back one preferred airspace transmit filter, such as airspace transmit filter 0, the receiving end terminal 2 feeds back With an optimal airspace transmission filter, such as airspace transmission filter 2, the transmitting terminal cannot simultaneously transmit sidelink data for two receiving terminals. And if the receiving terminal 1 feeds back two preferred spatial transmission filters, such as spatial transmission filters 0 and 1, and the receiving terminal 2 feeds back two preferred spatial transmission filters, such as spatial transmission filters 1 and 2, then the transmitting terminal The sidelink data can be transmitted to two receiver terminals simultaneously using the spatial domain transmit filter 1 .
- the measurement results corresponding to the N CSI-RS resources are greater than or equal to a first threshold.
- the first threshold value is pre-configured or agreed by the protocol, or the first threshold value is configured by the network device, or the first threshold value is configured by the first terminal device .
- the N CSI-RS resources correspond to the first N CSI-RSs arranged in descending order of the measurement results of the CSI-RSs received by the second terminal device.
- the number of CSI-RS sent by the first terminal device detected by the second terminal device is less than N, or the number of CSI-RS resources for which the detected CSI-RS meets the reporting conditions is less than N.
- N The CSI-RS resources include N1 first-type CSI-RS resources and N2 second-type CSI-RS resources.
- the first terminal device When the first terminal device receives the feedback information (that is, the first information) from the second terminal device, it can be determined according to the default value that its corresponding CSI-RS resource index is an invalid index.
- the default value is pre-configured or agreed by the protocol, or the default value is configured by the network device, or the default value is configured for the second terminal device by the first terminal device , or, the default value is configured for the first terminal device by the second terminal device, or, the default value is configured for the third terminal device, and the third terminal device is the first terminal device and the second terminal device The group head terminal of the communication group where the second terminal device is located.
- the group head terminal is a terminal that has at least one of the following functions in the communication group: resource management, resource allocation, resource coordination, resource configuration, and management of joining and leaving of group members.
- the default value indicates the default measurement result when there is no measurement result.
- the measurement result fed back by the receiving terminal to the transmitting terminal is the default value, it means that the receiving terminal has a default value for the CSI- There are no measurements for RS resources.
- the default value is pre-configured or network device configuration, for example, the default value is included in resource pool configuration information or sidewalk bandwidth part (BWP) configuration information.
- BWP sidewalk bandwidth part
- the sending terminal sends the receiving terminal Send PC5-RRC signaling, which carries the default value information.
- the default value is less than or equal to the second threshold value, or the default value corresponds to negative infinity or infinity.
- the second threshold value is pre-configured or agreed by the protocol, or the second threshold value is configured by the network device, or the second threshold value is configured by the first terminal device .
- the default value may be less than or equal to the value corresponding to the lowest measurement result.
- the index corresponding to the N2 second-type CSI-RS resources is determined by at least one CSI-RS resource in the N1 first-type CSI-RS resources, for example, select N1
- the resource index corresponding to the CSI-RS resource with the best or worst measurement result in the first type of CSI-RS resource is used as the index of the N2 second type of CSI-RS resources.
- N 3
- the second terminal device In addition to feeding back the resource index corresponding to CSI-RS resource 1 and CSI-RS resource 2, the second terminal device The second terminal device also needs to feed back a CSI-RS resource index.
- the second terminal device selects the CSI-RS with the best RSRP measurement result, that is, CSI-RS resource 1, and feeds back its CSI-RS resource index.
- the second terminal arranges its corresponding CSI-RS resources in descending order of RSRP measurement results, so the order of the fed back CSI-RS resource indexes is shown in Figure 16 . Therefore, among the three CSI-RS resource indexes fed back by the second terminal device, two CSI-RS resource index values of 1 and one CSI-RS resource index value of 2 are included.
- the first terminal device receives the feedback information from the second terminal device, according to the repeated CSI-RS resource index 1, it can be determined that one of the CSI-RS index 1 (such as the second CSI-RS resource index 1) is a Invalid index.
- the index corresponding to the N2 second-type CSI-RS resources is determined by at least one CSI-RS resource among the N1 first-type CSI-RS resources, specifically, for example, N1 is selected.
- the resource index corresponding to the CSI-RS resource with the best or worst measurement result among the CSI-RS resources of the first type is used as the index of the N2 CSI-RS resources of the second type.
- the second terminal device In addition to feeding back the resource index corresponding to CSI-RS resource 1 and CSI-RS resource 2, the second terminal device The second terminal device also needs to feed back two CSI-RS resource indexes. Since both CSI-RS resource 1 and CSI-RS resource 2 have measurement results, the second terminal device can repeatedly feed back CSI-RS resource 1 and CSI-RS resource 2.
- the order of the fed back CSI-RS resource indexes is shown in FIG. 17 . Therefore, the 4 CSI-RS resource indexes fed back by the second terminal device include two CSI-RS resource index values of 1 and two CSI-RS resource index values of 2.
- the first terminal device receives the feedback information from the second terminal device, it can determine one of the CSI-RS indexes (such as the second CSI-RS resource index 1 and the second CSI-RS resource index 1) according to the repeated CSI-RS resource indexes.
- -RS resource index 2 is an invalid index.
- the second terminal device when the number of CSI-RS resources meeting the conditions detected by the second terminal device is N1 (N1 ⁇ N), the second terminal device feeds back N CSI-RS resource information and N measurement results , which includes N1 pieces of CSI-RS resource information satisfying the conditions and their corresponding measurement results, and other (N-N1) pieces of CSI-RS resource information, and their corresponding measurement results are default values.
- the CSI-RS resources that meet the conditions include the following two situations:
- the CSI-RS resource meeting the condition includes the CSI-RS resource detected by the second terminal device. That is, the second terminal device will detect the SCI sent by the first terminal device. If the SCI is detected, the resource information of the CSI-RS sent by the first terminal device can be determined through the SCI. Therefore, the second terminal device can use the CSI -RS to measure and obtain corresponding measurement results.
- the CSI-RS resource meeting the condition includes the CSI-RS resource detected by the second terminal device, and the measurement result thereof exceeds the first threshold. That is, the second terminal device will feed back the CSI-RS resource information only when the second terminal device detects the CSI-RS resource and the measurement result exceeds the first threshold.
- the fed back CSI-RS resource information includes CSI-RS resource 1 and CSI-RS resource 2, and CSI-RS resource 3 is not fed back.
- the second terminal device may select any CSI-RS resource (except the CSI-RS resource meeting the condition) to associate with the default value.
- the second terminal device randomly selects one of the CSI-RS resources 0/1/3 and feeds back its index value, and its corresponding measurement result is set as a default value.
- the second terminal device selects CSI-RS resource 0 sets its measurement result as a default value, and feeds it back to the first terminal device, as shown in FIG. 20 .
- the second terminal equipment from N1 Select a CSI-RS resource from the CSI-RS resources that meet the conditions, and set its measurement result as the default value. For example, the CSI-RS with the best or worst measurement result is selected from the N1 CSI-RS resources, or a CSI-RS is selected arbitrarily or randomly.
- two CSI-RS such as CSI-RS resource 1 and CSI-RS -RS resource 2
- the RSRP threshold is-80dBm
- the measurement result is -10dBm and the default value, as shown in Figure 19.
- the first measurement information includes quantization index information of measurement results respectively corresponding to the N CSI-RS resources.
- the index of the N CSI-RS resources and the number of bits occupied by the quantization index information of the measurement results corresponding to the N CSI-RS resources are:
- A represents the number of bits occupied by one CSI-RS resource index among the N CSI-RS resource indexes
- B represents the quantization index of the measurement result corresponding to one CSI-RS resource among the N CSI-RS resource indexes the number of bits occupied by the information
- the first measurement information includes quantization index information of the first measurement result and N-1 differential quantization index information, where the first measurement result corresponds to the measurement results corresponding to the N CSI-RS resources highest value.
- the index of the N CSI-RS resources and the number of bits occupied by the quantization index information of the measurement results corresponding to the N CSI-RS resources are:
- A represents the number of bits occupied by the index of one CSI-RS resource among the indexes of the N CSI-RS resources
- B represents the number of bits occupied by the quantized index information of the first CSI-RS resource among the N CSI-RS resources.
- the number of bits, and the measurement result corresponding to the first CSI-RS resource is the CSI-RS resource with the largest corresponding measurement result among the N CSI-RS resources, and C represents other CSI-RS resources among the N CSI-RS resources The number of bits occupied by the quantization index information of the difference between the measurement result corresponding to the resource and the measurement result corresponding to the first CSI-RS resource, or, C represents the two adjacent CSI-RS resources corresponding to the measurement result The number of bits occupied by the quantization index information of the difference of the measurement result corresponding to the CSI-RS resource, and
- the range of RSRP measurement results represented by B bits is [B1, B2]dBm, (such as [-140,-44]dBm), the step size is 1dBm, and the range represented by differential RSRP It is [C1,C2]dB (such as [-30,0]dB), and the step size is 2dB.
- the differential RSRP is obtained relative to the maximum RSRP measurement result, that is, the difference between the differential RSRP representation and the maximum RSRP measurement result.
- the differential RSRP is obtained relative to the measurement result of an RSRP adjacent to it and greater than it.
- the maximum RSRP corresponds to -60dBm, and the remaining two differential RSRPs are -10dB and -30dB respectively;
- the maximum RSRP corresponds to -60dBm, and the remaining two differential RSRPs are -10dB and -20dB respectively.
- the second terminal device performs RSRP measurement according to CSI-RS, and feeds back the measurement result of RSRP.
- the second terminal device usually uses Sidelink Control Information (Sidelink Control Information, SCI) or Media Access Control Control Element (Media Access Control Control Element, MAC CE) to carry the feedback CSI-RS resource information and corresponding measurement results. Therefore, it is necessary to quantify the RSRP measurement results.
- SCI Sidelink Control Information
- MAC CE Media Access Control Element
- the second terminal device feeds back is the layer 1 RSRP measurement result (that is, L1 RSRP), that is, the RSRP result obtained by physical layer measurement is directly quantized and fed back to the first terminal device without going through layer 3 filtering.
- 7 bits are used to quantize the measured RSRP, as shown in Table 1 below.
- the range of quantized RSRP is [-140,44]dBm
- the measurement results smaller than the minimum value (ie -140dBm) are represented by an RSRP index
- the measurement result is represented by an RSRP index. Therefore, the default value can be defined to be less than or equal to the minimum value in the quantization range.
- the default RSRP is -141dBm, which is smaller than the minimum quantization value; at this time, the quantized RSRP can be expressed as the following table.
- the RSRP corresponding index fed back by the second terminal device to the first terminal device is RSRP_15
- 7 bits are used to quantize the measured RSRP, as shown in Table 2 below.
- RSRP_2 invalid dBm RSRP_3 invalid dBm RSRP_4 invalid dBm RSRP_5 invalid dBm RSRP_6 invalid dBm RSRP_7 invalid dBm RSRP_8 invalid dBm RSRP_9 invalid dBm RSRP_10 invalid dBm RSRP_11 invalid dBm RSRP_12 invalid dBm RSRP_13 invalid dBm RSRP_14 invalid dBm RSRP_15 RSRP ⁇ -141 dBm RSRP_16 -141 ⁇ RSRP ⁇ -140 dBm RSRP_17 -140 ⁇ RSRP ⁇ -139 dBm RSRP_18 -139 ⁇ RSRP ⁇ -138 dBm ... the ... RSRP_111 -46 ⁇ RSRP ⁇ -45 dBm RSRP_112 -45 ⁇ RSRP ⁇ -44 dBm RSRP_113 -44 ⁇ RSRP d
- the default RSRP setting is negative infinity (or a very small value, such as -1000dBm), or the default RSRP setting is infinity (or a very large value, such as 1000dBm); at this time, the quantized RSRP They can be expressed as the following Table 3-1 and Table 3-2 respectively.
- the RSRP corresponding index fed back by the second terminal device to the first terminal device is RSRP_0 in Table 3-1 (or RSRP_127 in Table 3-2)
- the second terminal device When the above example is applicable to the N CSI-RSs fed back by the second terminal device and their measurement results, a corresponding RSRP result (such as a 7-bit quantization result) is fed back for each measurement result.
- the second terminal device in order to reduce the overhead of feedback signaling, the second terminal device usually adopts a differential RSRP feedback manner for multiple RSRP measurement results.
- the second terminal device when the second terminal device needs to feed back N CSI-RS resource information and their corresponding RSRP measurement results, for those with the best RSRP measurement results, the second terminal device feeds back its corresponding CSI-RS and corresponding RSRP measurement results
- the result (such as the RSRP index after 7-bit quantization in Table 1 above), but for the other N-1 measurement results, the feedback differential RSRP is usually used.
- the so-called differential RSRP can include two situations:
- the first case the difference relative to the optimal RSRP result.
- the corresponding differential RSRP index is "DIFFRSRP_12".
- the second case that is, the difference with respect to its neighbor and the measurement result is greater than or equal to its RSRP measurement result.
- a default value for differential RSRP may be defined.
- the last differential RSRP index ie DIFFRSRP_15
- DIFFRSRP_15 the last differential RSRP index
- the first information includes indexes of N3 CSI-RS resources
- the N3 CSI-RS resources are determined by the second terminal device according to the measurement results of the received CSI-RS measurements, N3 ⁇ N, N is the number of CSI-RS resources that the second terminal device needs to feed back or report, N3 and N are positive integers, and N ⁇ M.
- the N3 CSI-RS resources correspond to the CSI-RS received by the second terminal device, or, the N3 CSI-RS resources correspond to the CSI-RS received by the second terminal device and the corresponding measurement result is greater than Or a CSI-RS equal to the first threshold.
- the indexes of the N3 CSI-RS resources are arranged according to the order of the measurement results corresponding to the N3 CSI-RS resources from high to low, or, the indexes of the N3 CSI-RS resources are arranged according to the order of the N3 CSI-RS resources
- the measurement results corresponding to the CSI-RS resources are arranged in descending order. For details, reference may be made to the relevant description about the quantization index information of the measurement results respectively corresponding to the N CSI-RS resources, which will not be repeated here.
- the first information further includes second measurement information, where the second measurement information is used to indicate measurement results corresponding to the N3 CSI-RS resources.
- the second measurement information includes quantization index information of measurement results respectively corresponding to the N3 CSI-RS resources.
- quantization index information of the measurement results respectively corresponding to the N CSI-RS resources For details, reference may be made to the relevant description about the quantization index information of the measurement results respectively corresponding to the N CSI-RS resources, which will not be repeated here.
- the second measurement information includes quantization index information of the second measurement result and N3-1 differential quantization index information, where the second measurement result corresponds to the measurement results corresponding to the N3 CSI-RS resources highest value.
- quantization index information of the measurement results respectively corresponding to the N CSI-RS resources, which will not be repeated here.
- the first information further includes fifth indication information, where the fifth indication information is used to indicate the value of N3.
- the measurements include lateral RSRP and/or lateral SINR.
- the first information is carried by one of the following:
- SCI Sidelink Control Information
- MAC CE Media Access Control Control Element
- PSFCH Physical Sidelink Feedback Channel
- PC5-RRC signaling PC5-RRC signaling.
- an information field included in SCI, MAC CE or PC5-RRC is used to indicate the value of parameter N and/or N3.
- the format of the MAC CE may be as shown in FIG. 20 or FIG. 21 .
- the MAC CE when the RSRP to be fed back is fed back its corresponding quantized RSRP index (as shown in Table 1), that is, when each RSRP is represented by 7 bits, the MAC CE includes N3 CSI-RS resource indexes and their The corresponding RSRP measurement result, and includes the information field indicating the value of N3.
- N 3, that is, at most 3 CSI-RS resources and their corresponding measurement results are fed back, and the CSI-RS resource set includes 4 CSI-RS resources, so 2 bits are used to represent the CSI-RS index,
- each Each RSRP measurement result is represented by 7 bits, so the order of each CSI-RS resource in the MAC CE may not be agreed upon.
- Oct1 means byte 1, and so on.
- the second terminal device may Sending indication information (that is, second information) to the first terminal device, used to indicate that the second terminal device has not received the CSI-RS, or used to instruct the first terminal device to resend the CSI-RS in turn.
- the second terminal device may send the indication information (i.e. the second information) through SCI, MAC CE or PC5-RRC, when the indication information (i.e. the second information) is carried by the MAC CE, as shown in Figure 20 (d) shown.
- the MAC CE includes N1 CSI-RS resource indexes and their corresponding RSRP measurement results.
- N 3, that is, at most 3 CSI-RS resources and their corresponding measurement results are fed back, and the CSI-RS resource set includes 4 CSI-RS resources, so 2 bits are used to represent the CSI-RS index,
- the CSI-RS resource corresponding to the measurement result, CSI-RS k2 indicates the CSI-RS resource corresponding to the second highest RSRP measurement result, and CSI-RS k3 indicates the CSI-RS resource corresponding to the third highest RSRP measurement result.
- the second terminal device may Sending indication information (that is, second information) to the first terminal device, used to indicate that the second terminal device has not received the CSI-RS, or used to instruct the first terminal device to resend the CSI-RS in turn.
- the second terminal device may send the indication information (i.e. the second information) through SCI, MAC CE or PC5-RRC, when the indication information (i.e. the second information) is carried by the MAC CE, as shown in Figure 21 (d) shown.
- the method 200 further includes:
- the first terminal device selects a target CSI-RS resource according to the first information, and the airspace transmission filter corresponding to the target CSI-RS resource is the target airspace transmission filter.
- the first terminal device sends sidelink data to the second terminal device by using the target airspace transmission filter.
- the second terminal device receives the sidelink data sent by the first terminal device using the target airspace transmit filter corresponding to the target CSI-RS resource.
- the transmission beam corresponding to the target CSI-RS resource may be considered as the target transmission beam.
- the method also includes:
- the first terminal device sends second sideline configuration information to the second terminal device, where the second sideline configuration information is used to configure at least one transmission configuration indication TCI state, the at least one TCI state includes a first TCI state, and the second sideline configuration information
- the reference signal included in a TCI state is the CSI-RS corresponding to the target CSI-RS resource.
- the first terminal device can use different transmit beams to transmit CSI-RS resources, and the second terminal device can use the same receive beam to receive CSI-RS resources, and perform measurement and report based on the CSI-RS resources , so that the first terminal device can report the amount to determine the target transmission beam.
- the determined target transmission beam is the target transmission beam corresponding to the reception beam, that is, when the first terminal device uses the target transmission beam to send a signal, the second terminal device
- the sidewalk transmission performance is optimal when using this receive beam for signal reception.
- the second terminal device may use polling to receive the CSI-RS resource using a different receiving beam to determine The target receiving beam corresponding to each receiving beam obtains at least one TCI state.
- the first terminal device uses four transmit beams (transmit beam 0 to airspace transmit beam 3) to transmit CSI-RS resources respectively, and the second terminal device can use four receive beams (receive beam 0 to airspace receive beam 3) ) to receive CSI-RS resources.
- the second terminal device first uses receive beam 0 to receive the CSI-RS resource, and according to the CSI-RS The RS resource is measured and reported, so that the first terminal device can report the quantity to determine the target transmission beam.
- the target reception beam is the target transmission beam corresponding to the reception beam 0 and then the first terminal device uses four transmission beams ( When sending CSI-RS resources from sending beam 0 to airspace sending beam 3), the second terminal device uses receiving beam 1 to receive the CSI-RS resources, and performs measurement and reporting based on the CSI-RS resources, so that the first terminal device can The reported amount determines the target sending beam.
- the target receiving beam is the target sending beam corresponding to the receiving beam 1.
- the polling process can determine the target sending beam corresponding to each receiving beam.
- the quasi-co-site (QCL) type included in the first TCI state is QCL-TypeD.
- the method 200 also includes:
- the first terminal device sends sixth indication information to the second terminal device, where the sixth indication information is used to indicate the state of the first TCI.
- the sixth indication information includes index information corresponding to the first TCI state.
- the sixth indication information is carried by one of the following:
- SCI Sidelink Control Information
- Media Access Control Element Media Access Control Element
- MAC CE Media Access Control Control Element
- PC5-RRC signaling PC5-RRC signaling.
- the first terminal device when the sixth indication information is carried by SCI or MAC CE, the first terminal device indicates activation of sidelink feedback.
- the first terminal device can indicate the corresponding TCI status for the sidelink signal or sidelink channel
- the second terminal device can use the same receiving beam as the CSI-RS resource that receives the TCI status indication to receive the sidelink signal or sidelink channel.
- the horizontal signal or the side channel is beneficial to improve the performance of the side transmission.
- the method 200 also includes:
- the first terminal device receives the second information sent by the second terminal device; wherein,
- the second information is used to indicate that the second terminal device has not detected the CSI-RS, or the second information is used to indicate that the second terminal device detects that the CSI-RS corresponding to the measurement results is lower than the first threshold value , or, the second information is used to instruct the first terminal device to resend the M CSI-RSs. Further, the first terminal device re-uses the spatial domain transmission filter to respectively transmit the M CSI-RSs to the second terminal device.
- the second terminal device sends the second information to the second terminal device, including:
- the second terminal device sends the second information to the second terminal device in a third time unit, where the third time unit is located after a fourth time unit determined based on a delay boundary.
- the second information is carried by one of the following:
- an optimal airspace transmission filter between the first terminal device and the second terminal device can be selected.
- the first terminal device and the second terminal device exchange CSI-RS resource sending configuration, receive configuration and report or feedback at least one of the configuration, so that the second terminal device can perform CSI-RS resource measurement based on the above configuration and report, the first terminal device can determine the target CSI-RS resource according to the reported amount, and the transmission beam corresponding to the target CSI-RS resource can be regarded as the target transmission beam, thereby realizing the selection of the optimal transmission beam in the sidelink transmission system .
- the sending terminal can perform sidelink transmission based on the optimal transmission beam, and correspondingly, the receiving terminal can perform sidelink reception based on the receiving beam corresponding to the optimal transmission beam, which is beneficial to improve sidelink transmission performance.
- Fig. 22 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application.
- the terminal device 400 includes:
- the communication unit 410 is configured to use the airspace transmission filter to send M channel state information reference signals CSI-RS to the second terminal device, and the M CSI-RS are used to select a target airspace transmission filter;
- the M CSI-RSs correspond to multiple CSI-RS resources in the target CSI-RS resource set, and M is a positive integer.
- the corresponding repetition field in the configuration information of the target CSI-RS resource set takes the first value
- the first value is used to indicate that the terminal device does not use the same spatial domain transmission filter to transmit the CSI-RS resources in the target CSI-RS resource set.
- the communication unit 410 is further configured to: send first indication information to the network device, where the first indication information is used to instruct the terminal device to request the network device to allocate transmission resources for sending CSI-RS .
- the first indication information includes period information for sending the CSI-RS by the terminal device.
- the first indication information includes the value of M.
- the communication unit 410 is further configured to: receive first configuration information sent by the network device, where the first configuration information includes the CSI- RS transmission resources.
- the first configuration information includes second indication information, and the second indication information is used to indicate that the transmission resource allocated by the network device is used to transmit the CSI-RS for selecting the target airspace transmission filter .
- the first indication information is carried by one of the following:
- Physical uplink control channel PUCCH Physical uplink control channel PUCCH, uplink radio resource control RRC signaling.
- the second indication information is carried by one of the following: downlink control information DCI and RRC signaling.
- the communication unit 410 is further configured to: send first lateral configuration information to the second terminal device;
- the first side row configuration information includes at least one of the following:
- the repetition field corresponding to the target CSI-RS resource set takes the first value to indicate that the terminal device does not use the same spatial domain transmission filter to transmit CSI-RS, and the repetition field corresponding to the target CSI-RS resource set Taking the second value is used to instruct the terminal device to use the same spatial domain transmission filter to transmit the CSI-RS.
- the terminal device does not expect the second terminal device to report or feedback the CSI-RS; and/or, after exceeding the delay boundary, allow The second terminal device reports or feeds back the CSI-RS; and/or, after exceeding the delay boundary, the second terminal device does not expect the terminal device to send the CSI-RS; and/or, After exceeding the delay boundary, the second terminal device stops receiving the CSI-RS sent by the terminal device.
- the communication unit 410 is further configured to: send third indication information to the second terminal device;
- the third indication information is used to indicate at least one of the following:
- the terminal device will send the CSI-RS for selecting the target airspace transmission filter, the terminal device will use different airspace transmission filters to send the CSI-RS, and the amount of channel state information CSI reporting, the terminal device is the first The index of the sent CSI-RS resource, the time interval for the terminal device to send the first CSI-RS resource, where the time interval is based on the time unit where the third indication information is located.
- the communication unit 410 is further configured to: send fourth indication information to the second terminal device;
- the fourth indication information is used to indicate that the CSI-RS sent by the terminal equipment is used to select a spatial domain transmission filter for the terminal equipment to transmit sidelink data; or, the fourth indication information is used to indicating that the CSI-RS sent by the terminal device is used to select a spatial receiving filter for the second terminal device to receive sidelink data; or, the fourth indication information is used to indicate the CSI sent by the terminal device - RS is used to measure channel state information.
- the terminal device further includes: a processing unit configured to determine the target CSI-RS resource set according to the resource pool configuration information or the first CSI-RS resource set included in the sidelink bandwidth part configuration information;
- the CSI reporting amount includes at least one of the following:
- CSI-RS resource indication CRI, CRI and reference signal received power RSRP, CRI and received signal strength indication SINR, slot resource indication, slot resource indication and RSRP, slot resource indication and SINR, not reported.
- the first side row configuration information is carried by one of the following:
- the third indication information is carried by one of the following:
- PC5-RRC signaling SCI, MAC CE, sidelink feedback information.
- the fourth indication information is carried by one of the following:
- PC5-RRC signaling SCI, MAC CE, sidelink feedback information.
- the communication unit 410 is further configured to: carry the CSI-RS in the SCI associated with the CSI-RS when sending the CSI-RS to the second terminal device using an airspace transmission filter.
- the CSI-RS resource indication information corresponding to the CSI-RS includes an index of a CSI-RS resource set corresponding to the CSI-RS and/or an index of the CSI-RS resource.
- the communication unit 410 is further configured to: receive first information sent by the second terminal device;
- the first information includes a target CSI reporting amount
- the target CSI reporting amount includes at least one of the following:
- the time slot resource indication information is used to determine the corresponding time slot for the terminal device to send the CSI-RS, or the time slot resource indication information is used to determine the index corresponding to the CSI-RS resource sent by the terminal device .
- the first information includes indexes of N CSI-RS resources, or, the first information is used to determine indexes of N CSI-RS resources, and the N CSI-RS resources are all
- the second terminal device determines according to the received CSI-RS measurement result, N is the number of CSI-RS resources that the second terminal device needs to report or feed back, N is a positive integer, and N ⁇ M.
- the indexes of the N CSI-RS resources are arranged according to the order of the measurement results corresponding to the N CSI-RS from high to low, or the indexes of the N CSI-RS resources are arranged according to the The measurement results corresponding to the N CSI-RSs are arranged in descending order.
- the first information further includes first measurement information, and the first measurement information is used to indicate measurement results corresponding to the N CSI-RS resources.
- the measurement results corresponding to the N CSI-RS resources are greater than or equal to a first threshold.
- the first measurement information includes quantization index information of measurement results respectively corresponding to the N CSI-RS resources.
- the first measurement information includes quantization index information of the first measurement result and N-1 differential quantization index information, where the first measurement result corresponds to the N CSI-RS resources corresponding to The highest value in the measurement result.
- the first information includes indexes of N3 CSI-RS resources, and the N3 CSI-RS resources are determined by the second terminal device according to the measurement results of the received CSI-RS. Yes, N3 ⁇ N, N is the number of CSI-RS resources that the second terminal device needs to feed back or report, N3 and N are positive integers, and N ⁇ M.
- the measurement results corresponding to the N3 CSI-RS resources are greater than or equal to a first threshold.
- the first information further includes fifth indication information, and the fifth indication information is used to indicate the value of N3.
- the first information further includes second measurement information, and the second measurement information is used to indicate measurement results corresponding to the N3 CSI-RS resources.
- the second measurement information includes quantization index information of measurement results respectively corresponding to the N3 CSI-RS resources.
- the second measurement information includes quantization index information of the second measurement result and N3-1 differential quantization index information, where the second measurement result corresponds to the N3 CSI-RS resources corresponding to The highest value in the measurement result.
- the value of N is determined according to at least one of the following information:
- Resource pool configuration information instruction information sent by the terminal device to the second terminal device, instruction information sent by the second terminal device to the terminal device.
- the measurements include RSRP and/or SINR.
- the first information is carried by one of the following:
- the terminal device further includes a processing unit, configured to select a target CSI-RS resource according to the first information, and the airspace transmission filter corresponding to the target CSI-RS resource is used for the target airspace transmission filter.
- the communication unit 410 is further configured to: send second side configuration information to the second terminal device, where the second side configuration information is used to configure at least one transmission configuration indication TCI state, the The at least one TCI state includes a first TCI state, and the reference signal included in the first TCI state is a CSI-RS corresponding to a target CSI-RS resource determined by the terminal device according to the first information.
- the quasi-co-site QCL type included in the first TCI state is QCL-TypeD.
- the communication unit 410 is further configured to: send sixth indication information to the second terminal device, where the sixth indication information is used to indicate the first TCI state.
- the communication unit 410 is also used for:
- the communication unit 410 is further configured to: receive the first information sent by the second terminal device in a first time unit, wherein the first time unit is located at a time interval determined based on a delay boundary After the second time unit.
- the communication unit 410 is further configured to: receive second information sent by the second terminal device; wherein,
- the second information is used to indicate that the second terminal device does not detect the CSI-RS or that the measurement results of the CSI-RS detected by the second terminal are all smaller than the first threshold value, or the second information It is used to instruct the terminal device to resend the M CSI-RSs.
- the communication unit 410 is further configured to: re-use a spatial domain transmission filter to respectively transmit the M CSI-RSs to the second terminal device.
- the communication unit 410 is further configured to: receive the third information sent by the second terminal device at a third time unit, where the third time unit is located at a time interval determined based on a delay boundary After the fourth time unit.
- the first threshold value is pre-configured or agreed by the protocol, or the first threshold value is configured by the network device, or the first threshold value is configured by the terminal device configured.
- the above-mentioned communication unit may be a communication interface or a transceiver, or an input-output interface of a communication chip or a system-on-chip.
- the aforementioned processing unit may be one or more processors.
- terminal device 400 may correspond to the first terminal in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 400 are respectively in order to realize the For the sake of brevity, the corresponding process of the first terminal device in method 200 will not be repeated here.
- Fig. 23 is a schematic block diagram of a terminal device according to another embodiment of the present application.
- the terminal device 500 of FIG. 23 includes:
- the communication unit 510 is configured to receive M channel state information reference signals CSI-RS sent by the first terminal device, wherein the M CSI-RS are used to select a target airspace transmission filter, and the M CSI-RS correspond to Multiple CSI-RS resources in the target CSI-RS resource set, M is a positive integer.
- the corresponding repetition field in the configuration information of the target CSI-RS resource set takes the first value
- the first value is used to indicate that the first terminal device does not use the same spatial domain transmission filter to transmit the CSI-RS resources in the target CSI-RS resource set.
- the communication security 510 is also used to:
- the first side row configuration information includes at least one of the following:
- the repetition field corresponding to the target CSI-RS resource set takes the first value to indicate that the first terminal device does not use the same spatial domain transmission filter to transmit CSI-RS, and the target CSI-RS resource set corresponds to The second value of the repetition field is used to indicate that the first terminal device uses the same spatial domain transmission filter to transmit the CSI-RS.
- the first terminal device does not expect the terminal device to report or feedback the CSI-RS; and/or, after exceeding the delay boundary, allow The terminal device reports or feeds back the CSI-RS; and/or, after exceeding the delay boundary, the terminal device does not expect the first terminal device to send the CSI-RS; and/or, after exceeding After the delay boundary, the terminal device stops receiving the CSI-RS sent by the first terminal device.
- the communication unit 510 is also used for:
- the third indication information is used to indicate at least one of the following:
- the first terminal device will send the CSI-RS used to select the target airspace transmission filter, the first terminal device will use different airspace transmission filters to send the CSI-RS, the channel state information CSI reporting amount, the first The index of the first CSI-RS resource sent by a terminal device, the time interval for sending the first CSI-RS resource by the first terminal device, wherein the time interval is the time unit where the third indication information is located for reference.
- the communication unit 510 is further configured to: receive fourth indication information sent by the first terminal device;
- the fourth indication information is used to indicate that the CSI-RS sent by the first terminal device is used to select a spatial domain transmission filter for the first terminal device to transmit sidelink data; or, the fourth The indication information is used to indicate that the CSI-RS sent by the first terminal equipment is used to select a spatial domain receiving filter for the terminal equipment to receive sidelink data; or, the fourth indication information is used to indicate the first The CSI-RS sent by a terminal device is used to select and measure channel state information.
- the CSI reporting amount includes at least one of the following:
- CSI-RS resource indication CRI, CRI and reference signal received power RSRP, CRI and received signal strength indication SINR, slot resource indication, slot resource indication and RSRP, slot resource indication and SINR, not reported.
- the first side row configuration information is carried by one of the following:
- the third indication information is carried by one of the following:
- PC5-RRC signaling SCI, MAC CE, sidelink feedback information.
- the fourth indication information is carried by one of the following:
- PC5-RRC signaling SCI, MAC CE, sidelink feedback information.
- the communication unit 510 is also used for:
- the first terminal device transmits the CSI-RS to the terminal device each time using the airspace transmission filter, receiving the CSI-RS corresponding to the CSI-RS carried by the first terminal device in the SCI associated with the CSI-RS CSI-RS resource indication information.
- the CSI-RS resource indication information corresponding to the CSI-RS includes an index of a CSI-RS resource set corresponding to the CSI-RS and/or an index of the CSI-RS resource.
- the communication unit 510 is also used for:
- the first information includes a target CSI reporting amount
- the target CSI reporting amount includes at least one of the following:
- the time slot resource indication information is used to determine the time slot corresponding to the CSI-RS sent by the first terminal device, or the time slot resource indication information is used to determine the CSI-RS sent by the first terminal device The index corresponding to the resource.
- the first information includes indexes of N CSI-RS resources, or, the first information is used to determine indexes of N CSI-RS resources, and the N CSI-RS resources are all
- the terminal device determines according to the received CSI-RS measurement results, N is the number of CSI-RS resources that the terminal device needs to report or feed back, N is a positive integer, and N ⁇ M.
- the indexes of the N CSI-RS resources are arranged according to the order of the measurement results corresponding to the N CSI-RS from high to low, or the indexes of the N CSI-RS resources are arranged according to the The measurement results corresponding to the N CSI-RSs are arranged in descending order.
- the first information further includes first measurement information, and the first measurement information is used to indicate measurement results corresponding to the N CSI-RS resources.
- the measurement results corresponding to the N CSI-RS resources are greater than or equal to a first threshold.
- the first measurement information includes quantization index information of measurement results respectively corresponding to the N CSI-RS resources.
- the first measurement information includes quantization index information of the first measurement result and N-1 differential quantization index information, where the first measurement result corresponds to the N CSI-RS resources corresponding to The highest value in the measurement result.
- the first information includes indexes of N3 CSI-RS resources, and the N3 CSI-RS resources are determined by the terminal device according to the measurement results of the received CSI-RS measurements, N3 ⁇ N, N is the number of CSI-RS resources that the terminal device needs to feed back or report, N3 and N are positive integers, and N ⁇ M.
- the measurement results corresponding to the N3 CSI-RS resources are greater than or equal to a first threshold.
- the first information further includes fifth indication information, and the fifth indication information is used to indicate the value of N3.
- the first information further includes second measurement information, and the second measurement information is used to indicate measurement results corresponding to the N3 CSI-RS resources.
- the second measurement information includes quantization index information of measurement results respectively corresponding to the N3 CSI-RS resources.
- the second measurement information includes quantization index information of the second measurement result and N3-1 differential quantization index information, where the second measurement result corresponds to the N3 CSI-RS resources corresponding to The highest value in the measurement result.
- the value of N is determined according to at least one of the following information:
- Resource pool configuration information instruction information sent by the first terminal device to the terminal device, instruction information sent by the terminal device to the first terminal device.
- the measurements include RSRP and/or SINR.
- the first information is carried by one of the following:
- the communication unit 510 is further configured to: receive second side configuration information sent by the first terminal device, where the second side configuration information is used to configure at least one transmission configuration indication TCI state,
- the at least one TCI state includes a first TCI state, and the reference signal included in the first TCI state is a CSI-RS corresponding to a target CSI-RS resource determined by the first terminal device according to the first information.
- the quasi-co-site QCL type included in the first TCI state is QCL-TypeD.
- the communication unit 510 is further configured to: receive sixth indication information sent by the first terminal device, where the sixth indication information is used to indicate the first TCI state.
- the communication unit 510 is further configured to: receive sidelink data sent by the first terminal device using the spatial domain transmit filter corresponding to the target CSI-RS resource.
- the communication unit 510 is further configured to: send the first information to the terminal device in a first time unit, wherein the first time unit is located at a second time determined based on a delay boundary after the unit.
- the communication unit 510 is further configured to: send second information to the terminal device; wherein,
- the second information is used to indicate that the terminal device has not detected the CSI-RS or that the measurement results of the CSI-RS detected by the second terminal are all smaller than the first threshold value, or the second information is used to Instructing the first terminal device to resend the M CSI-RSs.
- the communication unit 510 is also used for:
- the first threshold value is pre-configured or agreed by the protocol, or the first threshold value is configured by the network device, or the first threshold value is the first terminal device configuration.
- the above-mentioned communication unit may be a communication interface or a transceiver, or an input-output interface of a communication chip or a system-on-chip.
- the aforementioned processing unit may be one or more processors.
- terminal device 500 may correspond to the second terminal in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 500 are respectively in order to realize the For the sake of brevity, the corresponding process of the second terminal in the method 200 will not be repeated here.
- FIG. 24 is a schematic structural diagram of a communication device 600 provided by an embodiment of the present application.
- the communication device 600 shown in FIG. 24 includes a processor 610, and the processor 610 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
- the communication device 600 may further include a memory 620 .
- the processor 610 can invoke and run a computer program from the memory 620, so as to implement the method in the embodiment of the present application.
- the memory 620 may be an independent device independent of the processor 610 , or may be integrated in the processor 610 .
- the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, to send information or data to other devices, or receive other Information or data sent by the device.
- the transceiver 630 may include a transmitter and a receiver.
- the transceiver 630 may further include antennas, and the number of antennas may be one or more.
- the communication device 600 may specifically be the first terminal device in the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the first terminal in each method of the embodiment of the application. For the sake of brevity, here No longer.
- the transceiver 630 in the communication device 600 may correspond to the communication unit 410 in the terminal device 400 shown in FIG. 22, and the transceiver 630 may perform the operations or functions performed by the communication unit 510. For simplicity , which will not be repeated here.
- the processor 610 in the communication device 600 may correspond to the processing unit 420 in the terminal device 400 shown in FIG. 22, and the processor 610 may perform the operations or functions performed by the processing unit 420. , which will not be repeated here.
- the communication device 600 may specifically be the second terminal device in the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the second terminal device in each method of the embodiment of the present application. For the sake of brevity, the This will not be repeated here.
- the transceiver 630 in the communication device 600 may correspond to the communication unit 510 in the terminal device 500 shown in FIG. 23, and the transceiver 630 may perform the operations or functions performed by the communication unit 510. , which will not be repeated here.
- the processor 610 in the communication device 600 may correspond to the processing unit 520 in the terminal device 500 shown in FIG. 23, and the processor 610 may perform the operations or functions performed by the processing unit 520. , which will not be repeated here.
- FIG. 25 is a schematic structural diagram of a chip according to an embodiment of the present application.
- the chip 700 shown in FIG. 25 includes a processor 710, and the processor 710 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
- the chip 700 may further include a memory 720 .
- the processor 710 can invoke and run a computer program from the memory 720, so as to implement the method in the embodiment of the present application.
- the memory 720 may be an independent device independent of the processor 710 , or may be integrated in the processor 710 .
- the chip 700 may also include an input interface 730 .
- the processor 710 can control the input interface 730 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.
- the chip 700 may also include an output interface 740 .
- the processor 710 can control the output interface 740 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.
- the chip can be applied to the first terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the first terminal in the various methods of the embodiments of the present application. For the sake of brevity, details are not repeated here. .
- the processor 710 in the chip 700 may correspond to the processing unit 420 in the terminal device 400 shown in FIG. 22, and the processor 710 may perform the operations or functions performed by the processing unit 420.
- the processor 710 in the chip 700 may correspond to the processing unit 420 in the terminal device 400 shown in FIG. 22, and the processor 710 may perform the operations or functions performed by the processing unit 420.
- the input interface 730 and the output interface 740 in the chip 700 may correspond to the communication unit 410 in the terminal device 400 shown in FIG.
- the operation or function of for the sake of brevity, will not be repeated here.
- the chip can be applied to the second terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the second terminal device in each method of the embodiment of the present application.
- the chip can implement the corresponding process implemented by the second terminal device in each method of the embodiment of the present application.
- the processor 710 in the chip 700 may correspond to the processing unit 520 of the terminal device 500 shown in FIG. No longer.
- the input interface 730 and output interface 740 in the chip 700 may correspond to the communication unit 510 in the terminal device 500 shown in FIG.
- the operation or function of for the sake of brevity, will not be repeated here.
- chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip, system-on-a-chip, or system-on-chip.
- FIG. 26 is a schematic block diagram of a communication system 700 provided by an embodiment of the present application. As shown in FIG. 26 , the communication system 700 includes a first terminal 710 and a second terminal 720 .
- the first terminal 710 can be used to realize the corresponding functions realized by the first terminal device in the above method
- the second terminal 720 can be used to realize the corresponding functions realized by the second terminal device in the above method. , which will not be repeated here.
- the processor in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
- each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
- the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Program logic devices, discrete gate or transistor logic devices, discrete hardware components.
- DSP Digital Signal Processor
- ASIC Application Specific Integrated Circuit
- FPGA Field Programmable Gate Array
- a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
- the steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
- the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
- the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
- the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
- the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash.
- the volatile memory can be Random Access Memory (RAM), which acts as external cache memory.
- RAM Static Random Access Memory
- SRAM Static Random Access Memory
- DRAM Dynamic Random Access Memory
- Synchronous Dynamic Random Access Memory Synchronous Dynamic Random Access Memory
- SDRAM double data rate synchronous dynamic random access memory
- Double Data Rate SDRAM, DDR SDRAM enhanced synchronous dynamic random access memory
- Enhanced SDRAM, ESDRAM synchronous connection dynamic random access memory
- Synchlink DRAM, SLDRAM Direct Memory Bus Random Access Memory
- Direct Rambus RAM Direct Rambus RAM
- the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is, the memory in the embodiments of the present application is intended to include, but not be limited to, these and any other suitable types of memory.
- the embodiment of the present application also provides a computer-readable storage medium for storing computer programs.
- the computer-readable storage medium can be applied to the first terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding processes implemented by the first terminal device in the methods of the embodiments of the present application, in order It is concise and will not be repeated here.
- the computer-readable storage medium can be applied to the second terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the second terminal device in each method of the embodiment of the present application, in order It is concise and will not be repeated here.
- the embodiment of the present application also provides a computer program product, including computer program instructions.
- the computer program product can be applied to the first terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the first terminal device in the methods of the embodiments of the present application.
- the computer program instructions cause the computer to execute the corresponding processes implemented by the first terminal device in the methods of the embodiments of the present application.
- the computer program product can be applied to the second terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the second terminal device in the methods of the embodiments of the present application.
- the computer program instructions cause the computer to execute the corresponding processes implemented by the second terminal device in the methods of the embodiments of the present application.
- the embodiment of the present application also provides a computer program.
- the computer program can be applied to the first terminal device in the embodiment of the present application.
- the computer program runs on the computer, the computer executes the corresponding
- the process will not be repeated here.
- the computer program can be applied to the second terminal device in the embodiment of the present application, and when the computer program is run on the computer, the computer executes the corresponding
- the process will not be repeated here.
- 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.
- the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
- the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .
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Abstract
Description
上报值 | L1 RSRP | 单位 |
RSRP_0 | 无效 | dBm |
RSRP_1 | 无效 | dBm |
RSRP_2 | 无效 | dBm |
RSRP_3 | 无效 | dBm |
RSRP_4 | 无效 | dBm |
RSRP_5 | 无效 | dBm |
RSRP_6 | 无效 | dBm |
RSRP_7 | 无效 | dBm |
RSRP_8 | 无效 | dBm |
RSRP_9 | 无效 | dBm |
RSRP_10 | 无效 | dBm |
RSRP_11 | 无效 | dBm |
RSRP_12 | 无效 | dBm |
RSRP_13 | 无效 | dBm |
RSRP_14 | 无效 | dBm |
RSRP_15 | 无效 | dBm |
RSRP_16 | RSRP<-140 | dBm |
RSRP_17 | -140≤RSRP<-139 | dBm |
RSRP_18 | -139≤RSRP<-138 | dBm |
… | … | |
RSRP_111 | -46≤RSRP<-45 | dBm |
RSRP_112 | -45≤RSRP<-44 | dBm |
RSRP_113 | -44≤RSRP | dBm |
RSRP_114 | 无效 | dBm |
RSRP_115 | 无效 | dBm |
RSRP_116 | 无效 | dBm |
RSRP_117 | 无效 | dBm |
RSRP_118 | 无效 | dBm |
RSRP_119 | 无效 | dBm |
RSRP_120 | 无效 | dBm |
RSRP_121 | 无效 | dBm |
RSRP_122 | 无效 | dBm |
RSRP_123 | 无效 | dBm |
RSRP_124 | 无效 | dBm |
RSRP_125 | 无效 | dBm |
RSRP_126 | 无效 | dBm |
RSRP_127 | 无穷 | dBm |
上报值 | L1 RSRP | 单位 |
RSRP_0 | 无效 | dBm |
RSRP_1 | 无效 | dBm |
RSRP_2 | 无效 | dBm |
RSRP_3 | 无效 | dBm |
RSRP_4 | 无效 | dBm |
RSRP_5 | 无效 | dBm |
RSRP_6 | 无效 | dBm |
RSRP_7 | 无效 | dBm |
RSRP_8 | 无效 | dBm |
RSRP_9 | 无效 | dBm |
RSRP_10 | 无效 | dBm |
RSRP_11 | 无效 | dBm |
RSRP_12 | 无效 | dBm |
RSRP_13 | 无效 | dBm |
RSRP_14 | 无效 | dBm |
RSRP_15 | RSRP<-141 | dBm |
RSRP_16 | -141≤RSRP<-140 | dBm |
RSRP_17 | -140≤RSRP<-139 | dBm |
RSRP_18 | -139≤RSRP<-138 | dBm |
… | … | |
RSRP_111 | -46≤RSRP<-45 | dBm |
RSRP_112 | -45≤RSRP<-44 | dBm |
RSRP_113 | -44≤RSRP | dBm |
RSRP_114 | 无效 | dBm |
RSRP_115 | 无效 | dBm |
RSRP_116 | 无效 | dBm |
RSRP_117 | 无效 | dBm |
RSRP_118 | 无效 | dBm |
RSRP_119 | 无效 | dBm |
RSRP_120 | 无效 | dBm |
RSRP_121 | 无效 | dBm |
RSRP_122 | 无效 | dBm |
RSRP_123 | 无效 | dBm |
RSRP_124 | 无效 | dBm |
RSRP_125 | 无效 | dBm |
RSRP_126 | 无效 | dBm |
RSRP_127 | 无穷 | dBm |
上报值 | L1 RSRP | 单位 |
RSRP_0 | 负无穷 | dBm |
RSRP_1 | 无效 | dBm |
RSRP_2 | 无效 | dBm |
RSRP_3 | 无效 | dBm |
RSRP_4 | 无效 | dBm |
RSRP_5 | 无效 | dBm |
RSRP_6 | 无效 | dBm |
RSRP_7 | 无效 | dBm |
RSRP_8 | 无效 | dBm |
RSRP_9 | 无效 | dBm |
RSRP_10 | 无效 | dBm |
RSRP_11 | 无效 | dBm |
RSRP_12 | 无效 | dBm |
RSRP_13 | 无效 | dBm |
RSRP_14 | 无效 | dBm |
RSRP_15 | 无效 | dBm |
RSRP_16 | RSRP<-140 | dBm |
RSRP_17 | -140≤RSRP<-139 | dBm |
RSRP_18 | -139≤RSRP<-138 | dBm |
… | … | |
RSRP_111 | -46≤RSRP<-45 | dBm |
RSRP_112 | -45≤RSRP<-44 | dBm |
RSRP_113 | -44≤RSRP | dBm |
RSRP_114 | 无效 | dBm |
RSRP_115 | 无效 | dBm |
RSRP_116 | 无效 | dBm |
RSRP_117 | 无效 | dBm |
RSRP_118 | 无效 | dBm |
RSRP_119 | 无效 | dBm |
RSRP_120 | 无效 | dBm |
RSRP_121 | 无效 | dBm |
RSRP_122 | 无效 | dBm |
RSRP_123 | 无效 | dBm |
RSRP_124 | 无效 | dBm |
RSRP_125 | 无效 | dBm |
RSRP_126 | 无效 | dBm |
RSRP_127 | 无效 | dBm |
上报值 | L1 RSRP | 单位 |
RSRP_0 | 无效 | dBm |
RSRP_1 | 无效 | dBm |
RSRP_2 | 无效 | dBm |
RSRP_3 | 无效 | dBm |
RSRP_4 | 无效 | dBm |
RSRP_5 | 无效 | dBm |
RSRP_6 | 无效 | dBm |
RSRP_7 | 无效 | dBm |
RSRP_8 | 无效 | dBm |
RSRP_9 | 无效 | dBm |
RSRP_10 | 无效 | dBm |
RSRP_11 | 无效 | dBm |
RSRP_12 | 无效 | dBm |
RSRP_13 | 无效 | dBm |
RSRP_14 | 无效 | dBm |
RSRP_15 | 无效 | dBm |
RSRP_16 | RSRP<-140 | dBm |
RSRP_17 | -140≤RSRP<-139 | dBm |
RSRP_18 | -139≤RSRP<-138 | dBm |
… | … | |
RSRP_111 | -46≤RSRP<-45 | dBm |
RSRP_112 | -45≤RSRP<-44 | dBm |
RSRP_113 | -44≤RSRP | dBm |
RSRP_114 | 无效 | dBm |
RSRP_115 | 无效 | dBm |
RSRP_116 | 无效 | dBm |
RSRP_117 | 无效 | dBm |
RSRP_118 | 无效 | dBm |
RSRP_119 | 无效 | dBm |
RSRP_120 | 无效 | dBm |
RSRP_121 | 无效 | dBm |
RSRP_122 | 无效 | dBm |
RSRP_123 | 无效 | dBm |
RSRP_124 | 无效 | dBm |
RSRP_125 | 无效 | dBm |
RSRP_126 | 无效 | dBm |
RSRP_127 | 无穷 | dBm |
Claims (91)
- 一种无线通信的方法,其特征在于,包括:第一终端设备使用空域发送滤波器向第二终端设备发送M个信道状态信息参考信号CSI-RS,所述M个CSI-RS用于选取目标空域发送滤波器;其中,所述M个CSI-RS对应目标CSI-RS资源集合中的多个CSI-RS资源,M为正整数。
- 根据权利要求1所述的方法,其特征在于,所述目标CSI-RS资源集合的配置信息中对应的重复字段取第一值;其中,所述第一值用于指示所述第一终端设备不是使用相同的空域发送滤波器发送所述目标CSI-RS资源集合中的CSI-RS资源。
- 根据权利要求1或2所述的方法,其特征在于,所述方法还包括:所述第一终端设备向网络设备发送第一指示信息,所述第一指示信息用于指示所述第一终端设备请求网络设备分配用于发送CSI-RS的传输资源。
- 根据权利要求3所述的方法,其特征在于,所述第一指示信息包括所述第一终端设备发送CSI-RS的周期信息。
- 根据权利要3或4所述的方法,其特征在于,所述第一指示信息包括所述M的取值。
- 根据权利要求3至5中任一项所述的方法,其特征在于,所述方法还包括:所述第一终端设备接收所述网络设备发送的第一配置信息,所述第一配置信息包括所述网络设备为所述第一终端设备分配的用于发送CSI-RS的传输资源。
- 根据权利要求6所述的方法,其特征在于,所述第一配置信息包括第二指示信息,所述第二指示信息用于指示所述网络设备分配的传输资源用于发送用于选取目标空域发送滤波器的CSI-RS。
- 根据权利要求3-7中任一项所述的方法,其特征在于,所述第一指示信息通过以下之一承载:物理上行控制信道PUCCH,上行无线资源控制RRC信令。
- 根据权利要求3-8中任一项所述的方法,其特征在于,所述第二指示信息通过以下之一承载:下行控制信息DCI,RRC信令。
- 根据权利要求1-9中任一项所述的方法,其特征在于,所述方法还包括:所述第一终端设备向所述第二终端设备发送第一侧行配置信息;其中,所述第一侧行配置信息包括以下至少之一:所述目标CSI-RS资源集合的索引,所述目标CSI-RS资源集合中包括的CSI-RS资源的索引,所述目标CSI-RS资源集合中包括的CSI-RS资源的数量,M的取值,CSI-RS资源集合与CSI上报量的对应关系,所述第二终端设备向所述第一终端设备上报或反馈的CSI-RS资源的数量,时延边界,所述目标CSI-RS资源集合对应的重复字段的取值,所述第一终端设备发送所述M个CSI-RS所使用的传输资源信息,所述M个CSI-RS所使用的传输资源对应的资源池信息,所述第一终端设备的传输模式;其中,所述目标CSI-RS资源集合对应的重复字段取第一值用于指示所述第一终端设备不是使用相同的空域发送滤波器发送CSI-RS,所述目标CSI-RS资源集合对应的重复字段取第二值用于指示所述第一终端设备使用相同的空域发送滤波器发送CSI-RS。
- 根据权利要求10所述的方法,其特征在于,在所述时延边界内,所述第一终端设备不期待所述第二终端设备进行针对CSI-RS的上报或反馈;和/或,在超过所述时延边界之后,允许所述第二终端设备进行针对CSI-RS的上报或反馈;和/或,在超过所述时延边界之后,所述第二终端设备不期待所述第一终端设备发送CSI-RS;和/或,在超过所述时延边界之后,所述第二终端设备停止接收所述第一终端设备发送的CSI-RS。
- 根据权利要求1至11任一项所述的方法,其特征在于,所述方法还包括:所述第一终端设备向所述第二终端设备发送第三指示信息;其中,所述第三指示信息用于指示以下至少之一:所述第一终端设备将要发送用于选取目标空域发送滤波器的CSI-RS,所述第一终端设备将使用不同的空域发送滤波器发送CSI-RS,信道状态信息CSI上报量,所述第一终端设备第一个发送的CSI-RS资源的索引,所述第一终端设备发送第一个CSI-RS资源的时间间隔,其中,所述时间间隔以所述第三指示信息所在的时间单元为参考。
- 根据权利要求1-12中任一项所述的方法,其特征在于,所述方法还包括:所述第一终端设备向所述第二终端设备发送第四指示信息;其中,所述第四指示信息用于指示所述第一终端设备发送的CSI-RS用于选取用于所述第一终端设备进行侧行数据发送的空域发送滤波器;或者,所述第四指示信息用于指示所述第一终端设备发送 的CSI-RS用于选取用于所述第二终端设备进行侧行数据接收的空域接收滤波器;或者,所述第四指示信息用于指示所述第一终端设备发送的CSI-RS用于测量信道状态信息。
- 根据权利要求1至13任一项所述的方法,其特征在于,所述方法还包括:所述第一终端设备根据资源池配置信息或侧行带宽部分配置信息中包括的第一CSI-RS资源集合确定所述目标CSI-RS资源集合;所述第一终端设备根据所述第一CSI-RS资源集合包括的CSI-RS资源确定所述目标CSI-RS资源集合中包括的CSI-RS资源。
- 根据权利要求10至14任一项所述的方法,其特征在于,所述CSI上报量包括以下至少之一:CSI-RS资源指示CRI,CRI和参考信号接收功率RSRP,CRI和接收信号强度指示SINR,时隙资源指示,时隙资源指示和RSRP,时隙资源指示和SINR,不上报。
- 根据权利要求10所述的方法,其特征在于,所述第一侧行配置信息通过以下之一承载:侧行控制信息SCI,媒体接入控制控制元素MAC CE,PC5-无线资源控制RRC信令中。
- 根据权利要求12所述的方法,其特征在于,所述第三指示信息通过以下之一承载:PC5-RRC信令,SCI,MAC CE,侧行反馈信息。
- 根据权利要求13所述的方法,其特征在于,所述第四指示信息通过以下之一承载:PC5-RRC信令,SCI,MAC CE,侧行反馈信息。
- 根据权利要求1-9中任一项所述的方法,其特征在于,所述方法还包括:在所述第一终端设备使用空域发送滤波器向所述第二终端设备发送CSI-RS时,所述第一终端设备在与所述CSI-RS关联的SCI中携带所述CSI-RS对应的CSI-RS资源指示信息。
- 根据权利要求19所述的方法,其特征在于,所述CSI-RS对应的CSI-RS资源指示信息包括所述CSI-RS对应的CSI-RS资源集合的索引和/或所述CSI-RS资源的索引。
- 根据权利要求1至20中任一项所述的方法,其特征在于,所述方法还包括:所述第一终端设备接收所述第二终端设备发送的第一信息;其中,所述第一信息包括目标CSI上报量,所述目标CSI上报量包括以下至少之一:CRI,CRI和RSRP,CRI和SINR,时隙资源指示,时隙资源指示和RSRP,时隙资源指示和SINR;其中,所述时隙资源指示信息用于确定所述第一终端设备发送CSI-RS对应的时隙,或者,所述时隙资源指示信息用于确定所述第一终端设备发送的CSI-RS资源对应的索引。
- 根据权利要求21所述的方法,其特征在于,所述第一信息包括N个CSI-RS资源的索引,或者,所述第一信息用于确定N个CSI-RS资源的索引,所述N个CSI-RS资源为所述第二终端设备根据接收到的CSI-RS的测量结果确定的,N为所述第二终端设备需要上报或反馈的CSI-RS资源的数量,N为正整数,且N≤M。
- 根据权利要求22所述的方法,其特征在于,所述N个CSI-RS资源的索引按照所述N个CSI-RS对应的测量结果从高到低的顺序排列,或者,所述N个CSI-RS资源的索引按照所述N个CSI-RS对应的测量结果从低到高的顺序排列。
- 根据权利要求22或23所述的方法,其特征在于,所述第一信息还包括第一测量信息,所述第一测量信息用于指示所述N个CSI-RS资源对应的测量结果。
- 根据权利要求22-24中任一项所述的方法,其特征在于,所述N个CSI-RS资源对应的测量结果大于或等于第一门限值。
- 根据权利要求22-24中任一项所述的方法,其特征在于,所述N个CSI-RS资源包括N1个第一类CSI-RS资源和N2个第二类CSI-RS资源,其中,所述N1个第一类CSI-RS资源对应的测量结果大于或等于第一门限值,所述N2个第二类CSI-RS资源对应的索引由所述N1个第一类CSI-RS资源中的至少一个CSI-RS资源确定,或者,所述N2个第二类CSI-RS资源对应的索引由所述多个CSI-RS资源中除所述N1个第一类CSI-RS资源之外的CSI-RS资源中的至少一个CSI-RS资源确定,所述N2个第二类CSI-RS资源对应的测量结果为缺省值,N1和N2为正整数,N1+N2=N。
- 根据权利要求24所述的方法,其特征在于,所述第一测量信息包括所述N个CSI-RS资源分别对应的测量结果的量化索引信息。
- 根据权利要求24所述的方法,其特征在于,所述第一测量信息包括第一测量结果的量化索引信息以及N-1个差分量化索引信息,其中,所述第一测量结果对应所述N个CSI-RS资源对应的测量结果中的最高值。
- 根据权利要求21所述的方法,其特征在于,所述第一信息包括N3个CSI-RS资源的索引,所述N3个CSI-RS资源为所述第二终端设备根据接收到的CSI-RS进行测量得到的测量结果确定的,N3<N,N为所述第二终端设备需要反馈或上报 的CSI-RS资源的数量,N3和N的正整数,且N≤M。
- 根据权利要求29所述的方法,其特征在于,所述N3个CSI-RS资源对应的测量结果大于或等于第一门限值。
- 根据权利要求29或30所述的方法,其特征在于,所述第一信息还包括第五指示信息,所述第五指示信息用于指示N3的取值。
- 根据权利要求29至31中任一项所述的方法,其特征在于,所述第一信息还包括第二测量信息,所述第二测量信息用于指示所述N3个CSI-RS资源对应的测量结果。
- 根据权利要求32所述的方法,其特征在于,所述第二测量信息包括所述N3个CSI-RS资源分别对应的测量结果的量化索引信息。
- 根据权利要求32所述的方法,其特征在于,所述第二测量信息包括第二测量结果的量化索引信息以及N3-1个差分量化索引信息,其中,所述第二测量结果对应所述N3个CSI-RS资源对应的测量结果中的最高值。
- 根据权利要求22至34中任一项所述的方法,其特征在于,所述N的取值根据以下信息中的至少一种确定:资源池配置信息,所述第一终端设备向所述第二终端设备发送的指示信息,所述第二终端设备向所述第一终端设备发送的指示信息。
- 根据权利要求22至35中任一项所述的方法,其特征在于,所述测量结果包括RSRP和/或SINR。
- 根据权利要求21至36中任一项所述的方法,其特征在于,所述第一信息通过以下之一承载:SCI、MAC CE、侧行反馈信道PSFCH、PC5-RRC信令。
- 根据权利要求21至37中任一项所述的方法,其特征在于,所述方法还包括:所述第一终端设备根据所述第一信息,选取目标CSI-RS资源,所述目标CSI-RS资源对应的空域发送滤波器为所述目标空域发送滤波器。
- 根据权利要求38所述的方法,其特征在于,所述方法还包括:所述第一终端设备向所述第二终端设备发送第二侧行配置信息,所述第二侧行配置信息用于配置至少一个传输配置指示TCI状态,所述至少一个TCI状态包括第一TCI状态,所述第一TCI状态中包括的参考信号为所述第一终端设备根据所述第一信息确定的目标CSI-RS资源对应的CSI-RS。
- 根据权利要求39中所述的方法,其特征在于,所述第一TCI状态中包括的准共站址QCL类型为QCL-TypeD。
- 根据权利要求39或40所述的方法,其特征在于,所述方法还包括:所述第一终端设备向所述第二终端设备发送第六指示信息,所述第六指示信息用于指示所述第一TCI状态。
- 根据权利要求38-41中任一项所述的方法,其特征在于,所述方法还包括:所述第一终端设备使用所述目标CSI-RS资源对应的目标空域发送滤波器进行侧行传输。
- 根据权利要求21至42中任一项所述的方法,其特征在于,所述第一终端设备接收所述第二终端设备发送的第一信息,包括:所述第一终端设备在第一时间单元接收所述第二终端设备发送的所述第一信息,其中,所述第一时间单元位于基于时延边界确定的第二时间单元之后。
- 根据权利要求1至20中任一项所述的方法,其特征在于,所述方法还包括:所述第一终端设备接收所述第二终端设备发送的第二信息;其中,所述第二信息用于指示所述第二终端设备未检测到CSI-RS或所述第二终端检测到的CSI-RS的测量结果均小于第一门限值,或者,所述第二信息用于指示所述第一终端设备重新发送所述M个CSI-RS。
- 根据权利要求44所述的方法,其特征在于,所述方法还包括:所述第一终端设备重新使用空域发送滤波器分别向所述第二终端设备发送所述M个CSI-RS。
- 根据权利要求44或45所述的方法,其特征在于,所述第一终端设备接收所述第二终端设备发送的第三信息,包括:所述第一终端设备在第三时间单元接收所述第二终端设备发送的所述第三信息,其中,所述第三时间单元位于基于时延边界确定的第四时间单元之后。
- 根据权利要求25、26、30或44所述的方法,其特征在于,所述第一门限值为预配置或协议约定的,或者,所述第一门限值为网络设备配置的,或者,所述第一门限值为所述第一终端设备配置的。
- 一种无线通信的方法,其特征在于,包括:第二终端设备接收第一终端设备发送的M个信道状态信息参考信号CSI-RS,其中,所述M个CSI-RS用于选取目标空域发送滤波器,所述M个CSI-RS对应目标CSI-RS资源集合中的多个CSI-RS资源,M为正整数。
- 根据权利要求48所述的方法,其特征在于,所述目标CSI-RS资源集合的配置信息中对应的重复字段取第一值;其中,所述第一值用于指示所述第一终端设备不是使用相同的空域发送滤波器发送所述目标CSI-RS资源集合中的CSI-RS资源。
- 根据权利要求48或49所述的方法,其特征在于,所述方法还包括:所述第二终端设备接收所述第一终端设备发送的第一侧行配置信息;其中,所述第一侧行配置信息包括以下至少之一:所述目标CSI-RS资源集合的索引,所述目标CSI-RS资源集合中包括的CSI-RS资源的索引,所述目标CSI-RS资源集合中包括的CSI-RS资源的数量,M的取值,CSI-RS资源集合与CSI上报量的对应关系,所述第二终端设备向所述第一终端设备上报或反馈的CSI-RS资源的数量,时延边界,所述目标CSI-RS资源集合对应的重复字段的取值,所述第一终端设备发送所述M个CSI-RS所使用的传输资源信息,所述第一终端设备的传输模式;其中,所述目标CSI-RS资源集合对应的重复字段取第一值用于指示所述第一终端设备不是使用相同的空域发送滤波器发送CSI-RS,所述目标CSI-RS资源集合对应的重复字段取第二值用于指示所述第一终端设备使用相同的空域发送滤波器发送CSI-RS。
- 根据权利要求50所述的方法,其特征在于,在所述时延边界内,所述第一终端设备不期待所述第二终端设备进行针对CSI-RS的上报或反馈;和/或,在超过所述时延边界之后,允许所述第二终端设备进行针对CSI-RS的上报或反馈;和/或,在超过所述时延边界之后,所述第二终端设备不期待所述第一终端设备发送CSI-RS;和/或,在超过所述时延边界之后,所述第二终端设备停止接收所述第一终端设备发送的CSI-RS。
- 根据权利要求48至51任一项所述的方法,其特征在于,所述方法还包括:所述第二终端设备接收所述第一终端设备发送的第三指示信息;其中,所述第三指示信息用于指示以下至少之一:所述第一终端设备将要发送用于选取目标空域发送滤波器的CSI-RS,所述第一终端设备将使用不同的空域发送滤波器发送CSI-RS,信道状态信息CSI上报量,所述第一终端设备第一个发送的CSI-RS资源的索引,所述第一终端设备发送第一个CSI-RS资源的时间间隔,其中,所述时间间隔以所述第三指示信息所在的时间单元为参考。
- 根据权利要求48-52中任一项所述的方法,其特征在于,所述方法还包括:所述第二终端设备接收所述第一终端设备发送的第四指示信息;其中,所述第四指示信息用于指示所述第一终端设备发送的CSI-RS用于选取用于所述第一终端设备进行侧行数据发送的空域发送滤波器;或者,所述第四指示信息用于指示所述第一终端设备发送的CSI-RS用于选取用于所述第二终端设备进行侧行数据接收的空域接收滤波器;或者,所述第四指示信息用于指示所述第一终端设备发送的CSI-RS用于选取用于测量信道状态信息。
- 根据权利要求50至53任一项所述的方法,其特征在于,所述CSI上报量包括以下至少之一:CSI-RS资源指示CRI,CRI和参考信号接收功率RSRP,CRI和接收信号强度指示SINR,时隙资源指示,时隙资源指示和RSRP,时隙资源指示和SINR,不上报。
- 根据权利要求50所述的方法,其特征在于,所述第一侧行配置信息通过以下之一承载:侧行控制信息SCI,媒体接入控制控制元素MAC CE,PC5-无线资源控制RRC信令中。
- 根据权利要求52所述的方法,其特征在于,所述第三指示信息通过以下之一承载:PC5-RRC信令,SCI,MAC CE,侧行反馈信息。
- 根据权利要求53所述的方法,其特征在于,所述第四指示信息通过以下之一承载:PC5-RRC信令,SCI,MAC CE,侧行反馈信息。
- 根据权利要求48或49所述的方法,其特征在于,所述方法还包括:在所述第一终端设备每次使用空域发送滤波器向所述第二终端设备发送CSI-RS时,所述第二终端设备接收所述第一终端设备在与所述CSI-RS关联的SCI中携带的所述CSI-RS对应的CSI-RS资源指示信息。
- 根据权利要求58所述的方法,其特征在于,所述CSI-RS对应的CSI-RS资源指示信息包括所述CSI-RS对应的CSI-RS资源集合的索引和/或所述CSI-RS资源的索引。
- 根据权利要求48至59中任一项所述的方法,其特征在于,所述方法还包括:所述第二终端设备向所述第一终端设备发送第一信息;其中,所述第一信息包括目标CSI上报量,所述目标CSI上报量包括以下至少之一:CRI,CRI和RSRP,CRI和SINR,时隙资源指示,时隙资源指示和RSRP,时隙资源指示和SINR;其中,所述时隙资源指示信息用于确定所述第一终端设备发送CSI-RS对应的时隙,或者,所述时隙资源指示信息用于确定所述第一终端设备发送的CSI-RS资源对应的索引。
- 根据权利要求60所述的方法,其特征在于,所述第一信息包括N个CSI-RS资源的索引,或者,所述第一信息用于确定N个CSI-RS资源的索引,所述N个CSI-RS资源为所述第二终端设备根据接收到的CSI-RS的测量结果确定的,N为所述第二终端设备需要上报或反馈的CSI-RS资源的数量,N为正整数,且N≤M。
- 根据权利要求61所述的方法,其特征在于,所述N个CSI-RS资源的索引按照所述N个CSI-RS对应的测量结果从高到低的顺序排列,或者,所述N个CSI-RS资源的索引按照所述N个CSI-RS对应的测量结果从低到高的顺序排列。
- 根据权利要求61或62所述的方法,其特征在于,所述第一信息还包括第一测量信息,所述第一测量信息用于指示所述N个CSI-RS资源对应的测量结果。
- 根据权利要求61-63中任一项所述的方法,其特征在于,所述N个CSI-RS资源对应的测量结果大于或等于第一门限值。
- 根据权利要求61-63中任一项所述的方法,其特征在于,所述N个CSI-RS资源包括N1个第一类CSI-RS资源和N2个第二类CSI-RS资源,其中,所述N1个第一类CSI-RS资源对应的测量结果大于或等于第一门限值,所述N2个第二类CSI-RS资源对应的索引由所述N1个第一类CSI-RS资源中的至少一个CSI-RS资源确定,或者,所述N2个第二类CSI-RS资源对应的索引由所述多个CSI-RS资源中除所述N1个第一类CSI-RS资源之外的CSI-RS资源中的至少一个CSI-RS资源确定,所述N2个第二类CSI-RS资源对应的测量结果为缺省值,N1和N2为正整数,N1+N2=N。
- 根据权利要求63所述的方法,其特征在于,所述第一测量信息包括所述N个CSI-RS资源分别对应的测量结果的量化索引信息。
- 根据权利要求63所述的方法,其特征在于,所述第一测量信息包括第一测量结果的量化索引信息以及N-1个差分量化索引信息,其中,所述第一测量结果对应所述N个CSI-RS资源对应的测量结果中的最高值。
- 根据权利要求60所述的方法,其特征在于,所述第一信息包括N3个CSI-RS资源的索引,所述N3个CSI-RS资源为所述第二终端设备根据接收到的CSI-RS进行测量得到的测量结果确定的,N3<N,N为所述第二终端设备需要反馈或上报的CSI-RS资源的数量,N3和N的正整数,且N≤M。
- 根据权利要求68所述的方法,其特征在于,所述N3个CSI-RS资源对应的测量结果大于或等于第一门限值。
- 根据权利要求68或69所述的方法,其特征在于,所述第一信息还包括第五指示信息,所述第五指示信息用于指示N3的取值。
- 根据权利要求68至70中任一项所述的方法,其特征在于,所述第一信息还包括第二测量信息,所述第二测量信息用于指示所述N3个CSI-RS资源对应的测量结果。
- 根据权利要求71所述的方法,其特征在于,所述第二测量信息包括所述N3个CSI-RS资源分别对应的测量结果的量化索引信息。
- 根据权利要求71所述的方法,其特征在于,所述第二测量信息包括第二测量结果的量化索引信息以及N3-1个差分量化索引信息,其中,所述第二测量结果对应所述N3个CSI-RS资源对应的测量结果中的最高值。
- 根据权利要求61至73中任一项所述的方法,其特征在于,所述N的取值根据以下信息中的至少一种确定:资源池配置信息,所述第一终端设备向所述第二终端设备发送的指示信息,所述第二终端设备向所述第一终端设备发送的指示信息。
- 根据权利要求61至74中任一项所述的方法,其特征在于,所述测量结果包括RSRP和/或SINR。
- 根据权利要求60至75中任一项所述的方法,其特征在于,所述第一信息通过以下之一承载:SCI、MAC CE、侧行反馈信道PSFCH、PC5-RRC信令。
- 根据权利要求60至76中任一项所述的方法,其特征在于,所述方法还包括:所述第二终端设备接收所述第一终端设备发送的第二侧行配置信息,所述第二侧行配置信息用于配置至少一个传输配置指示TCI状态,所述至少一个TCI状态包括第一TCI状态,所述第一TCI状态中包括的参考信号为所述第一终端设备根据所述第一信息确定的目标CSI-RS资源对应的CSI-RS。
- 根据权利要求77中所述的方法,其特征在于,所述第一TCI状态中包括的准共站址QCL类型为QCL-TypeD。
- 根据权利要求77或78所述的方法,其特征在于,所述方法还包括:所述第二终端设备接收所述第一终端设备发送的第六指示信息,所述第六指示信息用于指示所述第一TCI状态。
- 根据权利要求77-79中任一项所述的方法,其特征在于,所述方法还包括:所述第二终端设备接收所述第一终端设备使用所述目标CSI-RS资源对应的空域发送滤波器发送的侧行数据。
- 根据权利要求60至80中任一项所述的方法,其特征在于,所述第二终端设备向所述第一终端设备发送第一信息,包括:所述第二终端设备在第一时间单元向所述第二终端设备发送所述第一信息,其中,所述第一时间单元位于基于时延边界确定的第二时间单元之后。
- 根据权利要求48至59中任一项所述的方法,其特征在于,所述方法还包括:所述第二终端设备向所述第二终端设备发送第二信息;其中,所述第二信息用于指示所述第二终端设备未检测到CSI-RS或所述第二终端检测到的CSI-RS的测量结果均小于第一门限值,或者,所述第二信息用于指示所述第一终端设备重新发送所述M个CSI-RS。
- 根据权利要求82所述的方法,其特征在于,所述第二终端设备向所述第二终端设备发送第二信息,包括:所述第二终端设备在第三时间单元向所述第二终端设备发送所述第二信息,其中,所述第三时间单元位于基于时延边界确定的第四时间单元之后。
- 根据权利要求64、65、69或82所述的方法,其特征在于,所述第一门限值为预配置或协议约定的,或者,所述第一门限值为网络设备配置的,或者,所述第一门限值为所述第一终端设备配置的。
- 一种终端设备,其特征在于,包括:通信单元,用于使用空域发送滤波器向第二终端设备发送M个信道状态信息参考信号CSI-RS,所述M个CSI-RS用于选取目标空域发送滤波器;其中,所述M个CSI-RS对应目标CSI-RS资源集合中的多个CSI-RS资源,M为正整数。
- 一种终端设备,其特征在于,包括:通信单元,用于接收第一终端设备发送的M个信道状态信息参考信号CSI-RS,其中,所述M个CSI-RS用于选取目标空域发送滤波器,所述M个CSI-RS对应目标CSI-RS资源集合中的多个CSI-RS资源,M为正整数。
- 一种终端设备,其特征在于,包括:处理器和存储器,该存储器用于存储计算机程序,所述处理器用于调用并运行所述存储器中存储的计算机程序,执行如权利要求1至47中任一项所述的方法,或者如权利要求48至84中任一项所述的方法。
- 一种芯片,其特征在于,包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有所述芯片的设备执行如权利要求1至47中任一项所述的方法,或者如权利要求48至84中任一项所述的方法。
- 一种计算机可读存储介质,其特征在于,用于存储计算机程序,所述计算机程序使得计算机执行如权利要求1至47中任一项所述的方法,或者如权利要求48至84中任一项所述的方法。
- 一种计算机程序产品,其特征在于,包括计算机程序指令,该计算机程序指令使得计算机执行如权利要求1至47中任一项所述的方法,或者如权利要求48至84中任一项所述的方法。
- 一种计算机程序,其特征在于,所述计算机程序使得计算机执行如权利要求1至47中任一项所述的方法,或者如权利要求48至84中任一项所述的方法。
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WO2020067761A1 (ko) * | 2018-09-28 | 2020-04-02 | 엘지전자 주식회사 | 데이터 신호를 송수신하는 방법 및 이를 위한 장치 |
WO2021034691A1 (en) * | 2019-08-16 | 2021-02-25 | Qualcomm Incorporated | Sidelink-based channel state information |
WO2021096977A1 (en) * | 2019-11-11 | 2021-05-20 | Convida Wireless LLC | Link recovery and sidelink beamforming |
CN112839304A (zh) * | 2019-11-22 | 2021-05-25 | 华为技术有限公司 | 通信方法及装置 |
CN113260084A (zh) * | 2021-05-18 | 2021-08-13 | 北京邮电大学 | 一种基于毫米波的车联网v2x通信链路的建立方法 |
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WO2020067761A1 (ko) * | 2018-09-28 | 2020-04-02 | 엘지전자 주식회사 | 데이터 신호를 송수신하는 방법 및 이를 위한 장치 |
WO2021034691A1 (en) * | 2019-08-16 | 2021-02-25 | Qualcomm Incorporated | Sidelink-based channel state information |
WO2021096977A1 (en) * | 2019-11-11 | 2021-05-20 | Convida Wireless LLC | Link recovery and sidelink beamforming |
CN112839304A (zh) * | 2019-11-22 | 2021-05-25 | 华为技术有限公司 | 通信方法及装置 |
CN113260084A (zh) * | 2021-05-18 | 2021-08-13 | 北京邮电大学 | 一种基于毫米波的车联网v2x通信链路的建立方法 |
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