Sidelink communication method and apparatus, and terminal, chip and storage medium

Abstract

Provided in the embodiments of the present application are a sidelink (SL) communication method and apparatus, and a terminal, a chip and a storage medium. The method comprises: a first terminal receiving beam reporting information sent by a second terminal, wherein the beam reporting information comprises beam reporting information corresponding to an SL CSI-RS, and on the basis of first priority information corresponding to a first PSFCH, the first terminal receives beam reporting information carried by the first PSFCH. Correspondingly, on the basis of the first priority information corresponding to the first PSFCH, the second terminal sends to the first terminal the beam reporting information carried by the first PSFCH.

Description

Sidelink communication method, device, terminal, chip, and storage medium Technical Field

[0001] The embodiments of the present application relate to the field of sidelink communication technology, and specifically to a sidelink communication method and device, terminal, chip, and storage medium. Background Art

[0002] In order to improve the transmission rate of the sidelink system, the use of millimeter wave frequency bands can be considered in sidelink communications. In the sidelink millimeter wave transmission system, data is transmitted between terminals using analog beams. Different beam polling can be used to send different SL channel state information measurement reference signal (Channel State Information Reference Signal, CSI-RS) resources, and one or more SL CSI-RS resources can be selected according to the beam reporting information. However, the terminal performs beam management by measuring the existing SL CSI-RS, which greatly increases the delay of beam management and seriously affects the efficiency of beam management. Therefore, it is necessary to enhance the SL CSI-RS.

[0003] However, after enhancing the SL CSI-RS and introducing different SL CSI-RS resource structures, there is a lack of methods for determining the priority information corresponding to the SL CSI-RS. Correspondingly, there is also a lack of relevant schemes for determining the priority information corresponding to the PSFCH associated with the SL CSI-RS, which makes it impossible to ensure the effectiveness of the beam management mechanism, thereby reducing communication reliability.

[0004] Summary of the Invention

[0005] Embodiments of the present application provide a sidelink communication method and apparatus, a terminal, a chip, a computer-readable storage medium, a computer program product, and a computer program.

[0006] In a first aspect, an embodiment of the present application provides a sidelink communication method, the method comprising:

[0007] The first terminal receives beam reporting information sent by the second terminal; wherein the beam reporting information includes beam reporting information corresponding to the SL CSI-RS, and the first terminal receives the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH.

[0008] In a second aspect, an embodiment of the present application provides a sidelink communication method, the method comprising:

[0009] The second terminal sends beam reporting information to the first terminal; wherein the beam reporting information includes beam reporting information corresponding to SL CSI-RS, and the second terminal sends the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH.

[0010] In a third aspect, an embodiment of the present application provides a sidelink communication device, applied to a first terminal, the device including:

[0011] A receiving unit is used to receive beam reporting information sent by the second terminal; wherein the beam reporting information includes beam reporting information corresponding to SL CSI-RS, and the first terminal receives the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH.

[0012] In a fourth aspect, an embodiment of the present application provides a sidelink communication device, applied to a second terminal, the device including:

[0013] A sending unit is used to send beam reporting information to the first terminal; wherein the beam reporting information includes beam reporting information corresponding to SL CSI-RS, and the second terminal sends the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH.

[0014] In a fifth aspect, an embodiment of the present application provides a terminal comprising a memory and a processor; wherein the memory is used to store computer-executable instructions; and the processor is connected to the memory and is used to implement the method described in any of the above aspects by executing the computer-executable instructions.

[0015] In a sixth aspect, an embodiment of the present application provides a chip, which includes: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the method described in any of the above aspects.

[0016] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by at least one processor, it implements the method described in any of the above aspects.

[0017] In an eighth aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions, which enable a computer to implement the method described in any of the above aspects when executed.

[0018] In a ninth aspect, an embodiment of the present application provides a computer program, which enables a computer to implement the method described in any of the above aspects when executed.

[0019] The embodiment of the present application proposes a side link communication scheme, in which a first terminal receives beam reporting information sent by a second terminal; wherein the beam reporting information includes beam reporting information corresponding to the SL CSI-RS, and the first terminal receives the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH. Correspondingly, the second terminal sends the beam reporting information carried by the first PSFCH to the first terminal based on the first priority information corresponding to the first PSFCH. That is to say, in the embodiment of the present application, for the PSFCH carrying the beam reporting information corresponding to the SL CSI-RS, the priority information corresponding to the PSFCH can be introduced, so that the priority information of the PSFCH can be used to receive or send the beam reporting information. It can be seen that the embodiment of the present application further optimizes the PSFCH sending / receiving mechanism by determining the priority information of the PSFCH associated with the SL CSI-RS, improves the relevant mechanism for the terminal to send and receive the PSFCH, thereby ensuring the effectiveness of the beam management mechanism and improving the communication reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1-1 is a schematic diagram of sideline communication within the network coverage area provided by an embodiment of the present application;

[0022] Figure 1-2 is a schematic diagram of partial network coverage sideline communication provided by an embodiment of the present application;

[0023] Figures 1-3 are schematic diagrams of network coverage outside line communications provided by embodiments of the present application;

[0024] Figures 1-4 are schematic diagrams of sideline communications with a central control node provided by embodiments of the present application;

[0025] FIG2-1 is a schematic diagram of a unicast transmission method provided in an embodiment of the present application;

[0026] Figure 2-2 is a schematic diagram of a multicast transmission method provided in an embodiment of the present application;

[0027] Figure 2-3 is a schematic diagram of a broadcast transmission method provided in an embodiment of the present application;

[0028] Figure 3-1 is a schematic diagram of the NR-V2X frame structure provided in an embodiment of the present application;

[0029] Figure 3-2 is a second schematic diagram of the NR-V2X frame structure provided in an embodiment of the present application;

[0030] FIG4 is a schematic diagram of PSSCH transmission provided in an embodiment of the present application;

[0031] FIG5 is a schematic diagram of a second-order SCI mapping method provided in an embodiment of the present application;

[0032] FIG6 is a schematic diagram of a SL CSI-RS time-frequency position provided in an embodiment of the present application;

[0033] FIG7 is a schematic diagram of a system without using analog beams provided in an embodiment of the present application;

[0034] FIG8 is a schematic diagram of a system using analog beams provided in an embodiment of the present application;

[0035] FIG9 is a first embodiment of the present application embodiment of the SL CSI-RS enhancement method;

[0036] FIG10 is a second SL CSI-RS enhancement method provided in an embodiment of the present application;

[0037] FIG11 is a schematic diagram of a first implementation flow of a sidelink communication method according to an embodiment of the present application;

[0038] FIG12 is a schematic diagram 1 of the association relationship between PSFCH and SL CSI-RS provided in an embodiment of the present application;

[0039] FIG13 is a second schematic diagram of the association relationship between PSFCH and SL CSI-RS provided in an embodiment of the present application;

[0040] FIG14 is a schematic diagram of an implementation of receiving a first PSFCH according to an embodiment of the present application;

[0041] FIG15 is a second schematic diagram of an implementation of receiving a first PSFCH provided in an embodiment of the present application;

[0042] FIG16 is a third schematic diagram of an implementation of receiving the first PSFCH provided in an embodiment of the present application;

[0043] FIG17 is a second schematic diagram of an implementation flow of a sidelink communication method provided in an embodiment of the present application;

[0044] FIG18 is a schematic diagram of an implementation of sending a first PSFCH according to an embodiment of the present application;

[0045] FIG19 is a second schematic diagram of an implementation of sending a first PSFCH provided in an embodiment of the present application;

[0046] FIG20 is a third schematic diagram of an implementation of sending a first PSFCH according to an embodiment of the present application;

[0047] FIG21 is a third schematic diagram of an implementation flow of a sidelink communication method provided in an embodiment of the present application;

[0048] FIG22 is a fourth schematic diagram of an implementation of sending a first PSFCH according to an embodiment of the present application;

[0049] FIG23 is a fifth schematic diagram of an implementation of sending a first PSFCH according to an embodiment of the present application;

[0050] FIG24 is a fourth flowchart of an implementation method of a sidelink communication method according to an embodiment of the present application;

[0051] FIG25 is a schematic diagram of the first structure of a sidelink communication device according to an embodiment of the present application;

[0052] FIG26 is a second schematic diagram of the structural composition of the sidelink communication device provided in an embodiment of the present application;

[0053] FIG27 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0054] Figure 28 is a schematic structural diagram of the chip of an embodiment of the present application. DETAILED DESCRIPTION

[0055] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0056] The technical solutions of the embodiments of the present application can be applied to various side communication systems (also referred to as side systems for short). To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies in the side communication system are explained below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0057] Sideline communication in different network coverage environments

[0058] In sideline communication, according to the network coverage of the communicating terminals, it can be divided into sideline communication within network coverage, sideline communication with partial network coverage, sideline communication outside network coverage, and sideline communication with a central control node, as shown in Figures 1-1, 1-2, 1-3, and 1-4 respectively.

[0059] As shown in Figure 1-1, in sideline communications within network coverage, all terminals performing sideline communications (such as terminal 1 and terminal 2 in Figure 1-1) are within the coverage range of the same base station. Therefore, the above terminals can all perform sideline communications based on the same sideline configuration by receiving configuration signaling from the base station.

[0060] As shown in Figure 1-2, in the case of partial network coverage for sidelink communication, some terminals performing sidelink communication (such as terminal 1 in Figure 1-2) are 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 outside the network coverage (such as terminal 2 in Figure 1-2) cannot receive configuration signaling from the base station. In this case, the terminals outside the network coverage will determine the sidelink configuration based on pre-configuration information and information carried in the Physical Sidelink Broadcast Channel (PSBCH) sent by terminals within the network coverage, and perform sidelink communication.

[0061] As shown in Figure 1-3, for sideline communication outside the network coverage, all terminals performing sideline communication (such as terminal 1 and terminal 2 in Figure 1-3) are located outside the network coverage, and all terminals determine the sideline configuration according to the pre-configuration information for sideline communication.

[0062] As shown in Figure 1-4, for side communication with a central control node, multiple terminals form a communication group. The communication group has a central control node (such as terminal 1 in Figure 1-4), which can also become the cluster head terminal (Cluster Header, CH). The central control node has one of the following functions: responsible for establishing the communication group; joining and leaving the group members; coordinating resources, allocating side transmission resources to other terminals (such as terminal 2 and terminal 3 in Figure 1-4), receiving side feedback information from other terminals; coordinating resources with other communication groups, etc.

[0063] The terminal in the sideline system can be any terminal, including but not limited to a terminal that is connected to a network device and / or other terminals by wired or wireless connection. For example, the terminal can refer to an access terminal, user equipment (UE), a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolution network, etc.

[0064] Resource selection method in sideline communication

[0065] Device-to-device (D2D) communication is a sidelink transmission technology based on device-to-device (D2D). Unlike traditional cellular systems, where communication data is received or sent via base stations, D2D communication offers higher spectrum efficiency and lower transmission latency. Sidelink communication utilizes direct device-to-device communication, and 3GPP defines two transmission modes: Mode 1 and Mode 2.

[0066] Mode 1: The base station allocates transmission resources to the terminal, and the terminal sends data on the sidelink based on the allocated resources. The base station can allocate resources for either single transmission or semi-static transmission. As shown in Figure 1-1, when the terminal is within network coverage, the network allocates transmission resources for sidelink transmission.

[0067] Mode 2: The terminal selects a resource from the resource pool for data transmission. As shown in Figure 1-3, if the terminal is outside the cell coverage area, it autonomously selects a transmission resource from the preconfigured resource pool for sidelink transmission. Alternatively, as shown in Figure 1-1, the terminal autonomously selects a transmission resource from the network-configured resource pool for sidelink transmission.

[0068] It should be noted that in the embodiment of the present application, the first mode may also be referred to as the first resource selection mode or mode 1, and the second mode may also be referred to as the second resource selection mode or mode 2. The technical solution of the embodiment of the present application does not limit the names of the first mode and the second mode.

[0069] Transmission method in NR-V2X

[0070] In NR-V2X, autonomous driving needs to be supported, which places higher requirements on data interaction between vehicles, such as higher throughput, lower latency, higher reliability, larger coverage, and more flexible resource allocation.

[0071] LTE-V2X supports broadcast transmission, while NR-V2X introduces unicast and multicast transmission. For unicast transmission, there is only one receiving terminal. As shown in Figure 2-1, unicast transmission is carried out between Terminal 1 and Terminal 2. For multicast transmission, the receiving terminals are all terminals in a communication group or all terminals within a certain transmission distance. As shown in Figure 2-2, Terminals 1, 2, 3, and 4 form a communication group. Terminal 1 transmits data, and all other terminals in the group are receiving terminals. For broadcast transmission, the receiving terminal is any terminal in the vicinity of the transmitting terminal. As shown in Figure 2-3, Terminal 1 is the transmitting terminal, and all other terminals in the vicinity, Terminals 2 through 6, are receiving terminals.

[0072] Second-order SCI mechanism in NR-V2X

[0073] Second-order sidelink control information (SCI) is introduced in NR-V2X. The first-order SCI is carried in the physical sidelink control channel (PSCCH) and is used to indicate the transmission resources, reserved resource information, modulation and coding scheme (MCS) level, priority value and other information of the physical sidelink shared channel (PSSCH). The second-order SCI is sent in the PSSCH resources and demodulated using the demodulation reference signal (DMRS) of the PSSCH. It is used to indicate the transmitter ID, receiver ID, hybrid automatic repeat reQuest (HARQ) ID, new data indicator (NDI) and other information used for data demodulation.

[0074] NR-V2X system frame structure

[0075] For example, the time slot structure in NR-V2X is shown in Figures 3-1 and 3-2. A time slot includes 14 side symbols. Each rectangular box in Figures 3-1 and 3-2 represents a side symbol, and the side symbol can be an orthogonal frequency division multiplexing (OFDM) symbol (also referred to as a symbol for short).

[0076] Figure 3-1 shows the timeslot structure without the Physical Sidelink Feedback Channel (PSFCH); Figure 3-2 shows the timeslot structure with the PSFCH. In both Figures 3-1 and 3-2, the PSCCH begins in the time domain at the second sidelink symbol of the timeslot, occupies two or three symbols, and can occupy {10, 12, 15, 20, 25} Physical Resource Blocks (PRBs) in the frequency domain. To reduce the complexity of blind PSCCH detection by terminals, only one number of PSCCH symbols and PRBs is allowed in a resource pool. Furthermore, because subchannels are the minimum granularity for PSSCH resource allocation in NR-V2X, the number of PRBs occupied by the PSCCH must be less than or equal to the number of PRBs contained in a subchannel within the resource pool to avoid additional restrictions on PSSCH resource selection or allocation. The PSSCH also begins in the time domain at the second sidelink symbol of the timeslot. The last sidelink symbol in a time slot is a guard period (GP) symbol, and the remaining symbols are mapped to the PSSCH. The first sidelink symbol in a time slot is a repetition of the second sidelink symbol. The receiver typically uses the first sidelink symbol as an automatic gain control (AGC) symbol, and the data on this symbol is not typically used for data demodulation. The PSSCH occupies K (K ≥ 1) subchannels in the frequency domain, each of which consists of N (N ≥ 1) consecutive PRBs. In Figure 3-2, the time slot contains the PSFCH. The second-to-last and third-to-last symbols in the time slot are used for PSFCH transmission, and the symbol preceding the PSFCH is used as a GP symbol.

[0077] Sidelink PSSCH

[0078] In NR-V2X, the PSSCH is used to carry second-order SCI and data information. The second-order SCI uses Polar coding and fixed QPSK modulation. The data portion of the PSSCH uses Low Density Parity Check (LDPC) and supports a maximum modulation order of 256QAM.

[0079] In NR-V2X, the PSSCH supports up to two stream transmissions and uses a unit precoding matrix to map data on two layers to two antenna ports. At most, one TB can be sent in a PSSCH. However, unlike the PSSCH data portion, when the PSSCH uses dual-stream transmission, the second-order SCI uses exactly the same modulation symbols on both streams. This design ensures the reception performance of the second-order SCI in highly correlated channels.

[0080] Since the maximum number of retransmissions of a PSSCH in NR-V2X is 32, if there are PSFCH resources in the resource pool and the configuration period of the PSFCH resources is 2 or 4, the OFDM symbols available in the time slot where different transmissions of a PSSCH are located may change. Figure 4 is a transmission diagram of the PSSCH provided in an embodiment of the present application, as shown in Figure 4. If the actual number of OFDM symbols in a time slot is calculated The difference in the number of symbols available for PSSCH transmission in a time slot may cause Q′ SCI2 Different, and Q′ SCI2 The change of will lead to the change of the size of the TB carried by PSSCH, as described below. In order to ensure that the TBS remains unchanged during multiple transmissions of PSSCH, The actual number of PSFCH symbols is not used. The number of REs occupied by the PSSCH DMRS and the number of REs occupied by the PT-RS, which may change during the retransmission process, are not taken into account.

[0081] Figure 5 is a schematic diagram of the mapping method for the second-order SCI provided by an embodiment of the present application. The code rate of the second-order SCI can be dynamically adjusted within a certain range. The specific code rate used is indicated by the first-order SCI. Therefore, even after the code rate changes, the receiver does not need to perform blind detection on the second-order SCI. The modulation symbols of the second-order SCI are mapped in the frequency domain first and then in the time domain, starting from the symbol containing the first PSSCH DMRS. In the OFDM symbol containing the DMRS, the second-order SCI is mapped to the REs not occupied by the DMRS, as shown in Figure 5.

[0082] The data portion of the PSSCH within a resource pool can use multiple MCS tables, including the conventional 64QAM MCS table, the 256QAM MCS table, and the low-spectrum-efficiency 64QAM MCS table. The specific MCS table used in a transmission is indicated by the "MCS Table Indicator" field in the first-order SCI. To control PAPR, the PSSCH must be transmitted using contiguous PRBs. Since the subchannel is the minimum frequency-domain resource granularity of the PSSCH, this requires that the PSSCH must occupy contiguous subchannels.

[0083] Sidelink CSI-RS

[0084] To better support unicast communication, NR-V2X supports SL CSI-RS. SL CSI-RS is sent only when the following three conditions are met:

[0085] The UE sends the corresponding PSSCH, that is, the UE cannot only send SL CSI-RS;

[0086] Sidelink CSI reporting is activated by higher-layer signaling;

[0087] When sidelink CSI reporting is activated by higher layer signaling, the corresponding bit in the second-order SCI sent by the UE triggers sidelink CSI reporting.

[0088] The maximum number of ports supported by SL CSI-RS is two. For two ports, SL CSI-RSs from different ports are code-division multiplexed across two adjacent REs in the same OFDM symbol. Within a PRB, the number of SL CSI-RSs per port is one, meaning the density is one. Therefore, within a PRB, SL CSI-RSs appear in at most one OFDM symbol. The specific location of this OFDM symbol is determined by the transmitting terminal. To avoid impacting the resource mapping of the PSCCH and second-order SCI, SL CSI-RSs cannot be located in the same OFDM symbol as the PSCCH and second-order SCIs. Because the channel estimation accuracy of the OFDM symbol where the PSSCH DMRS resides is higher, and the SL CSI-RSs for two ports occupy two consecutive REs in the frequency domain, SL CSI-RSs cannot be transmitted in the same OFDM symbol as the PSSCH DMRS. The OFDM symbol location of the SL CSI-RS is indicated by the sl-CSI-RS-FirstSymbol parameter in the PC5RRC protocol.

[0089] The position of the first RE occupied by the SL CSI-RS within a PRB is indicated by the sl-CSI-RS-FreqAllocation parameter in PC5RRC. If the SL CSI-RS is a single port, this parameter is a bitmap of length 12, corresponding to the 12 REs within a PRB. If the SL CSI-RS is a dual port, this parameter is a bitmap of length 6. In this case, the SL CSI-RS occupies two REs, 2f(1) and 2f(1)+1, where f(1) represents the index of the bit with a value of 1 in the bitmap. The frequency domain position of the SL CSI-RS is also determined by the transmitting terminal, but the determined frequency domain position of the SL CSI-RS cannot conflict with the PT-RS.

[0090] Figure 6 is a schematic diagram of the time-frequency position of an SL CSI-RS provided in an embodiment of the present application. As shown in Figure 6, the number of SL CSI-RS ports is 2, the sl-CSI-RS-FirstSymbol is 8, and the sl-CSI-RS-FreqAllocation is [b5, b4, b3, b2, b1, b0] = [0, 0, 0, 1, 0, 0].

[0091] Analog beamforming

[0092] NR / 5G system design goals include wide-bandwidth communications in high-frequency bands (e.g., bands above 6 GHz). As the operating frequency increases, path loss increases during transmission, impacting the coverage capabilities of high-frequency systems. To effectively ensure high-band NR system coverage, an effective technical solution is to use massive antenna arrays (Massive MIMO) to form shaped beams with greater gain, overcome propagation loss, and ensure system coverage.

[0093] Millimeter-wave antenna arrays, due to their shorter wavelengths, smaller antenna array spacing, and smaller apertures, allow more physical antenna arrays to be integrated into a two-dimensional antenna array of limited size. At the same time, due to the limited size of millimeter-wave antenna arrays, digital beamforming cannot be used due to factors such as hardware complexity, cost, and power consumption. Instead, analog beamforming is typically used, which enhances network coverage while reducing device implementation complexity.

[0094] In typical existing 2G / 3G / 4G systems, a cell (sector) uses a wide beam to cover the entire cell. Therefore, at every moment, UEs within the cell's coverage area have the opportunity to obtain transmission resources allocated by the system.

[0095] The NR / 5G multi-beam system uses different beams to cover the entire cell. That is, each beam covers a smaller area, and time sweeping is used to achieve the effect of multiple beams covering the entire cell.

[0096] The following diagrams illustrate systems without and with beamforming. Figure 7 shows a traditional LTE and NR system without beamforming, while Figure 8 shows an NR system with beamforming.

[0097] Figure 7 is a schematic diagram of a system provided in an embodiment of the present application without using analog beams. As shown in Figure 7, the LTE / NR network side uses a wide beam to cover the entire cell, and users 1-5 can receive network signals at any time.

[0098] In contrast, Figure 8 is a schematic diagram of a system using analog beams provided in an embodiment of the present application. As shown in Figure 8, the network side uses narrower beams (for example, beams 1-4 in the figure), and uses different beams at different times to cover different areas in the cell. For example, at time 1, the NR network side covers the area where user 1 is located through beam 1; at time 2, the NR network side covers the area where user 2 is located through beam 2; at time 3, the NR network side covers the area where users 3 and 4 are located through beam 3; at time 4, the NR network side covers the area where user 5 is located through beam 4.

[0099] In the right figure, because the network uses narrower beams, the transmission energy can be more concentrated, thus achieving greater coverage. At the same time, because the beams are narrow, each beam can only cover a portion of the cell. Therefore, analog beamforming "trades time for space." Analog beamforming can be used not only on network-side devices but also on terminals. Furthermore, analog beamforming can be used not only for signal transmission (called transmit beams) but also for signal reception (called receive beams).

[0100] In order to improve the transmission rate of the sidewalk system, the use of millimeter wave frequency bands can also be considered in sidewalk communications. In the sidewalk millimeter wave transmission system, data is transmitted between terminals using analog beams. Due to the existence of different beam directions, when the terminal operates in the millimeter wave frequency band, it is necessary to select appropriate transmit beams and receive beams through the beam management mechanism. In beam management, the terminal does not directly indicate the transmit beam or receive beam used for data transmission, but indirectly indicates the corresponding beam by indicating the reference signal associated with the beam. The reference signal can be a SL CSI-RS. Each SL CSI-RS can have corresponding index information, and different SL CSI-RS can correspond to different beam directions. When performing transmit beam selection, the terminal can use different beams to poll and send different SL CSI-RS resources. The receiving terminal receives the multiple SL CSI-RSs respectively and performs measurements. According to the measurement results, one or more SL CSI-RS resources can be selected, and the selected SL CSI-RS resource index information is reported to the transmitting terminal. The transmitting terminal can select a better SL CSI-RS from the reported one or more SL CSI-RS resources, and select its corresponding transmit beam as the optimal transmit beam. When performing receive beam selection, the transmitting terminal can use the selected optimal transmit beam to send the associated SL CSI-RS multiple times. The receiving terminal uses different receive beams to perform polling, reception and measurement. According to the measurement results, the receiving terminal selects a better receive beam as the receive beam corresponding to the transmit beam.

[0101] SL CSI-RS enhancement method

[0102] The common SL CSI-RS is transmitted aperiodically and must be sent in the same time slot as data. If the terminal performs beam management by measuring the existing SL CSI-RS, the latency of beam management will be greatly increased, seriously affecting the efficiency of beam management. Therefore, during the 3GPP RAN1 meeting, the following two methods were considered to enhance the SL CSI-RS.

[0103] Figure 9 is a first embodiment of the SL CSI-RS enhancement method provided by the embodiment of the present application. As shown in Figure 9, method 1 is a standalone SL CSI-RS. The above standalone means that the terminal cannot transmit data services in the time slot for transmitting the SL CSI-RS, that is, the time slot cannot be used to transmit the SL MAC SDU. The time slot may contain the first-order SCI, the second-order SCI and the SL MAC CE. The SL CSI-RS resource includes two OFDM symbols in the time domain, the first symbol is used for AGC, and the second symbol is used to transmit the SL CSI-RS. In addition, a time slot may contain multiple SL CSI-RS resources, such as CSI-RS#0, CSI-RS#1, ... in Figure 9. Since different transmission beams can be used when transmitting different SL CSI-RS, the multiple SL CSI-RS resources are TDM methods.

[0104] Figure 10 is a second SL CSI-RS enhancement method provided in an embodiment of the present application. As shown in Figure 10, Method 2 is a non-standalone SL CSI-RS, and the SL CSI-RS and data services can be transmitted in the same time slot. Unlike the existing SL CSI-RS, the SL CSI-RS and data services in Method 2 are TDM multiplexed, that is, they are transmitted using different OFDM symbols. Because the terminal can only select one beam direction when sending a signal, if the SL CSI-RS and data are located in the same OFDM symbol, the terminal cannot select different transmission beams for the data and SL CSI-RS.

[0105] After enhancing the SL CSI-RS and introducing a different SL CSI-RS resource structure in SL FR2, the following new problems will be introduced and need to be solved:

[0106] 1) When a SL terminal operates in Mode 2 and needs to transmit SL CSI-RS, it needs to select transmission resources for the SL CSI-RS. Using the existing Mode 2 resource selection mechanism is a method that has minimal impact on the standard. However, in the Mode 2 resource selection mechanism, the terminal needs to exclude resources based on the priority value indicated by the higher layer to complete resource selection. Currently, the 3GPP RAN1 discussion does not include the corresponding priority value for SL CSI-RS, and this issue needs to be enhanced.

[0107] 2) After the receiving terminal performs SL CSI-RS measurement, it needs to report the measurement result information to the transmitting terminal. According to current discussions at RAN1, the above-mentioned reporting information can be considered to be carried on the PSFCH. Therefore, the relevant priority value needs to be determined for the PSFCH associated with the SL CSI-RS.

[0108] 3) In the SL system, for PSFCH, due to the limited ability of the terminal to send / receive PSFCH and the half-duplex limitation, in the existing mechanism, the terminal needs to determine the PSFCH receiving / transmitting status and the number of PSFCHs received / transmitted based on the priority value of the PSFCH to be sent / received. Therefore, when the above-mentioned PSFCH carrying reporting information is introduced, the relevant rules for the terminal to receive / transmit PSFCH also need to be enhanced.

[0109] It can be seen that common technologies lack a method for determining the priority value corresponding to the SL CSI-RS, and correspondingly lack a relevant scheme for determining the priority value corresponding to the PSFCH associated with the SL CSI-RS, thereby failing to ensure the effectiveness of the beam management mechanism and reducing communication reliability.

[0110] In order to solve the above problems, in an embodiment of the present application, the first terminal receives the beam reporting information sent by the second terminal; wherein the beam reporting information includes the beam reporting information corresponding to the SL CSI-RS, and the first terminal receives the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH. Correspondingly, the second terminal sends the beam reporting information carried by the first PSFCH to the first terminal based on the first priority information corresponding to the first PSFCH. That is to say, in an embodiment of the present application, for the PSFCH carrying the beam reporting information corresponding to the SL CSI-RS, the priority information corresponding to the PSFCH can be introduced, so that the priority information of the PSFCH can be used to receive or send the beam reporting information. It can be seen that the embodiment of the present application further optimizes the PSFCH sending / receiving mechanism by determining the priority information of the PSFCH associated with the SL CSI-RS, improves the relevant mechanism of the terminal sending and receiving PSFCH, thereby ensuring the effectiveness of the beam management mechanism, and thus improving the communication reliability.

[0111] It should be understood that the terms "system" and "network" are often used interchangeably in this document. The term "and / or" in this document is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the objects associated before and after are in an "or" relationship. It should also be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B. It should also be understood that the "correspondence" mentioned in the embodiments of this application can mean that there is a direct or indirect correspondence between the two, or it can mean that there is an association relationship between the two, or it can mean a relationship between indication and indication, configuration and configuration, etc. It should also be understood that the "predefined" or "predefined rules" mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables, or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices). This application does not limit its specific implementation method. For example, predefined can refer to those defined in the protocol. It should also be understood that in the embodiments of the present application, the "protocol" can refer to a standard protocol in the field of communications.

[0112] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the scope of protection of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0113] An embodiment of the present application provides a sidelink communication method, which can be applied to a first terminal, wherein the first terminal can be a sidelink terminal.

[0114] It should be noted that, in the embodiments of the present application, the first terminal may be a terminal in a sidewalk system, which is not specifically limited in the present application. For example, the first terminal may be a sidewalk terminal in a sidewalk millimeter wave transmission system.

[0115] Furthermore, in an embodiment of the present application, FIG11 is a schematic diagram of a first implementation flow of a sidelink communication method provided in an embodiment of the present application. As shown in FIG11 , the sidelink communication method may include the following steps:

[0116] Step 101: The first terminal receives beam reporting information sent by the second terminal; wherein the beam reporting information includes beam reporting information corresponding to the SL CSI-RS, and the first terminal receives the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH.

[0117] In an embodiment of the present application, a first terminal may receive beam reporting information sent by a second terminal. Specifically, the first terminal may receive beam reporting information carried by a first PSFCH and sent by the second terminal based on first priority information corresponding to the first PSFCH.

[0118] It should be noted that, in the embodiments of the present application, the first priority information can be used to determine the priority of the first PSFCH. The present application does not specifically limit the form of the first priority information. For example, the first priority information can be the priority value of the first PSFCH, or a parameter indicating the priority value of the first PSFCH.

[0119] That is to say, in an embodiment of the present application, corresponding first priority information can be introduced for the first PSFCH, for example, the priority value of the first PSFCH, so that in the subsequent PSFCH transmission and reception process, the transmission and reception status and the number of PSFCH transmissions and receptions can be determined based on the first priority information of the first PSFCH, thereby ensuring the effectiveness of the beam management mechanism.

[0120] It should be noted that, in the embodiments of the present application, the larger the priority information, that is, the larger the priority value indicated by the priority information, the lower the priority, and the smaller the priority information, that is, the smaller the priority value indicated by the priority information, the higher the priority. In other words, the larger the priority value, the lower the priority, and the smaller the priority value, the higher the priority.

[0121] Exemplarily, in some embodiments, the first priority information may be an integer greater than or equal to 1 and less than or equal to 8. When the first priority information is 1, the corresponding first PSFCH has the highest priority; and when the first priority information is 8, the corresponding first PSFCH has the lowest priority.

[0122] That is to say, in an embodiment of the present application, when the first priority information is the priority value of the first PSFCH, the first priority information can be in the value range of 1-8. This is because the priority information of the SL data service includes eight priorities from 1 to 8, and the first priority information should also be within this range.

[0123] It is understandable that in an embodiment of the present application, the beam reporting information may include beam reporting information corresponding to the SL CSI-RS. The first terminal sends the SL CSI-RS to the second terminal, and the second terminal may use any reporting method when reporting after the measurement is completed. For example, the beam reporting information may be reported directly; a threshold value may be preset, and when the measurement result is greater than the threshold value, 1 bit of indication information may be reported; or 1 bit of indication information may be reported each time the measurement result is greater than all previous measurement results.

[0124] That is to say, in an embodiment of the present application, the information carried by the first PSFCH may be information of various contents, for example, it may carry beam reporting information corresponding to the SL CSI-RS, and this application does not make specific limitations.

[0125] It should be noted that, in the embodiments of the present application, the second terminal and the first terminal may be different sideline terminals, which is not specifically limited in the present application. For example, the second terminal may be a sideline terminal in a sideline millimeter wave transmission system.

[0126] Furthermore, in an embodiment of the present application, the first priority information may be determined based on one or more of the following information: second priority information of the SL CSI-RS, a priority reference value, and a first preset value.

[0127] It should be noted that, in the embodiments of the present application, the first priority information corresponding to the first PSFCH can be determined in a variety of ways. Among them, the first priority information can be determined based on the second priority information of the SL CSI-RS, or based on the priority reference value indicated by the SCI, or based on the first preset value, or based on a combination of the second priority information, the priority reference value, and the first preset value, which is not specifically limited in this application.

[0128] Furthermore, in an embodiment of the present application, the first terminal may first send first information to the second terminal; wherein the first information may be used to indicate second priority information of the SL CSI-RS.

[0129] It should be noted that, in the embodiments of the present application, the second priority information can be used to determine the priority of the SL CSI-RS. The present application does not specifically limit the form of the second priority information. For example, the second priority information can be the priority value of the SL CSI-RS or a parameter indicating the priority value of the SL CSI-RS.

[0130] That is to say, in an embodiment of the present application, corresponding second priority information can be introduced for the SL CSI-RS, for example, the priority value of the SL CSI-RS, so that the first priority information corresponding to the first PSFCH associated with the SL CSI-RS can be further determined, and then in the subsequent PSFCH reception and transmission process, the reception and transmission status and the number of PSFCH reception and transmission can be determined based on the first priority information of the first PSFCH, thereby ensuring the effectiveness of the beam management mechanism.

[0131] Exemplarily, in some embodiments, the second priority information may be an integer greater than or equal to 1 and less than or equal to 8. When the second priority information is 1, the corresponding SL CSI-RS has the highest priority; and when the second priority information is 8, the corresponding SL CSI-RS has the lowest priority.

[0132] That is to say, in an embodiment of the present application, when the second priority information is the priority value of SL CSI-RS, the second priority information can be in the value range of 1-8. This is because the priority information of SL data services includes eight priorities from 1 to 8. In order to ensure the compatibility and comparability of sidelink data transmission and SL CSI-RS transmission in the same resource pool, the priority information of SL CSI-RS should also be within this range.

[0133] It should be noted that, in an embodiment of the present application, the first terminal may send first information to the second terminal; wherein the first information is carried in a first signaling associated with the SL CSI-RS, and the first signaling may include SCI.

[0134] Exemplarily, in some embodiments, the first signaling carrying the first information may include a first-order SCI, wherein the first-order SCI may be used to indicate information such as PSSCH transmission resources, reserved resource information, modulation and coding strategy MCS level, priority information (such as second priority information), etc.

[0135] It can be understood that, in the embodiment of the present application, the first signaling is carried on the first physical sidewalk channel, and the first physical sidewalk channel may include a PSCCH.

[0136] That is, in an embodiment of the present application, the first terminal may send first information to the second terminal, where the first information is carried on a first-order SCI, and the first-order SCI is carried on a PSCCH.

[0137] Furthermore, in an embodiment of the present application, one or more SL CSI-RSs and the first signaling are transmitted in the same time slot.

[0138] It should be noted that, in an embodiment of the present application, the first terminal may send one or more SL CSI-RSs to the second terminal, and the one or more SL CSI-RSs and the SCI carrying the first information may be transmitted in the same time slot.

[0139] Exemplarily, in some embodiments, in a sideways millimeter wave transmission system, due to the existence of different beam directions, it is necessary to indirectly indicate the corresponding beam by indicating a reference signal associated with the beam. The reference signal may be an SL CSI-RS. Each SL CSI-RS may have corresponding index information, and different SL CSI-RS may correspond to different beam directions. For example, when selecting a transmit beam, the first terminal may use different beams to poll different SL CSI-RS resources, and the second terminal may receive the multiple SL CSI-RSs respectively and perform measurements. One or more SL CSI-RS resources may be selected based on the measurement results, and the selected SL CSI-RS resource index information may be reported to the transmitting terminal (such as the first terminal). The first terminal may select a better SL CSI-RS from the reported one or more SL CSI-RS resources, and select its corresponding transmit beam as the optimal transmit beam. Accordingly, when selecting a receiving beam, the second terminal can use the selected optimal transmitting beam to send the associated SL CSI-RS multiple times, and the first terminal uses different receiving beams for polling reception and measurement. According to the measurement results, the second terminal selects a better receiving beam as the receiving beam corresponding to the transmitting beam.

[0140] Furthermore, in an embodiment of the present application, the second priority information can be determined based on one or more of the following information: a preset mapping relationship between application type and priority information, priority information associated with allocated transmission resources, priority information of data to be transmitted, and a second preset value.

[0141] It should be noted that, in the embodiments of the present application, the second priority information corresponding to the SL CSI-RS can be determined in a variety of ways. Among them, the second priority information can be determined based on the preset mapping relationship between the application type and the priority information, or based on the priority information associated with the allocated transmission resources, or based on the priority information of the data to be transmitted, or based on the second preset value, or based on the preset mapping relationship between the application type and the priority information, the priority information associated with the allocated transmission resources, the priority information of the data to be transmitted, or the second preset value. The present application does not make specific limitations.

[0142] Furthermore, in an embodiment of the present application, a preset mapping relationship between application type and priority information is used to determine the correspondence between beam application type and priority information. The correspondence between beam application type and priority information can be one beam application type corresponding to one priority information, or one beam application type corresponding to multiple priority information. That is, the mapping relationship between beam application type and priority information can be one-to-one or one-to-many, and this application does not specifically limit this.

[0143] That is to say, in the examples of the present application, the relationship between the purpose of sending SL CSI-RS and the priority information of SL CSI-RS is a one-to-one mapping relationship or a one-to-many mapping relationship, and the priority information mapped for different purposes can be the same, different, or partially the same.

[0144] It should be noted that, in the embodiments of the present application, the beam application type includes one or more of the following types: initial beam pairing, beam maintenance, beam failure recovery, and candidate transmit beam selection.

[0145] It should be noted that in the embodiments of the present application, the beam application type can be used to characterize the purpose of sending SL CSI-RS, that is, the purpose of sending SL CSI-RS can include initial beam pairing, beam maintenance, beam failure recovery and candidate transmission beam selection.

[0146] It is understood that in embodiments of the present application, beam maintenance may include transmit beam selection and receive beam selection. That is, beam application types include, but are not limited to, one or more of the following: initial beam pairing, transmit beam selection, receive beam selection, beam failure recovery, and candidate transmit beam selection.

[0147] Furthermore, in an embodiment of the present application, if the second priority information is determined based on a preset mapping relationship between the application type and the priority information, that is, for the case where the second priority information of the SL CSI-RS is determined according to the purpose of sending the SL CSI-RS, the second priority information is the priority information corresponding to the beam application type of the SL CSI-RS, which is determined based on the preset mapping relationship between the application type and the priority information.

[0148] It should be noted that, in an embodiment of the present application, if the beam application type corresponding to the SL CSI-RS corresponds to multiple priority information, the second priority information finally determined may be one of the multiple priority information. The selection principle of the second priority information may be random selection or depend on the terminal implementation.

[0149] Exemplarily, in some embodiments, assuming that the preset mapping relationship between the application type and the priority information is used to determine a priority information corresponding to the beam application type, that is, there is a one-to-one mapping relationship between the beam application type and the priority information, then it can be determined that the purpose of sending the SL CSI-RS and the SL CSI-RS priority information are a one-to-one mapping relationship. The preset mapping relationship between the application type and the priority information can be shown in Table 1:

[0150] Table 1

[0151] Based on Table 1, assuming that the beam application type corresponding to the SL CSI-RS is initial beam pairing, the corresponding second priority information can be 1, which has the highest priority. That is, if the purpose of sending the SL CSI-RS is initial beam pairing, then the SL CSI-RS has the highest priority.

[0152] Exemplarily, in some embodiments, assuming that the preset mapping relationship between the application type and the priority information is used to determine multiple priority information corresponding to the beam application type, that is, the beam application type and the priority information are in a one-to-many mapping relationship, then it can be determined that the purpose of sending the SL CSI-RS and the SL CSI-RS priority information are in a one-to-many mapping relationship. The preset mapping relationship between the application type and the priority information can be shown in Table 2:

[0153] Table 2

[0154] Based on Table 2, assuming that the beam application type corresponding to the SL CSI-RS is initial beam pairing, the corresponding second priority information can be 1 or 2. That is, if the purpose of sending the SL CSI-RS is initial beam pairing, the second priority information of the SL CSI-RS can be selected from 1 or 2. The selection method among the multiple priorities is uniform random selection, or depends on the terminal implementation.

[0155] Furthermore, in an embodiment of the present application, if the second priority information is determined based on priority information associated with allocated transmission resources, that is, in the case where the second priority information of the SL CSI-RS is determined based on priority information associated with allocated transmission resources, the second priority information may be priority information associated with the allocated transmission resources. The allocated transmission resources (allocated SL grant) are used to simultaneously transmit the SL CSI-RS and SL data.

[0156] It can be understood that in an embodiment of the present application, if the SL CSI-RS to be transmitted is transmitted simultaneously with the SL data through the allocated SL grant, then the second priority information of the SL CSI-RS can be equal to the priority information associated with the allocated SL grant.

[0157] It should be noted that, in the embodiments of the present application, the priority information associated with the allocated transmission resources can be used to determine the priority of the allocated transmission resources. The present application does not specifically limit the form of the priority information. For example, the priority information can be a priority value of the allocated transmission resources, or a parameter indicating the priority value of the allocated transmission resources.

[0158] Furthermore, in an embodiment of the present application, if the second priority information is determined based on the priority information corresponding to the data to be transmitted in the logical channel, that is, for the case where the second priority information of the SL CSI-RS is determined based on the priority information corresponding to the data to be transmitted in the logical channel, the second priority information can be determined based on the minimum priority information in the priority information corresponding to the data to be transmitted in the logical channel.

[0159] It should be noted that, in the embodiments of the present application, the priority information corresponding to the data to be transmitted can be used to determine the priority of the data to be transmitted. The present application does not specifically limit the form of the priority information. For example, the priority information can be a priority value of the data to be transmitted, or a parameter indicating the priority value of the data to be transmitted.

[0160] It can be understood that in an embodiment of the present application, if the SL CSI-RS and SL data to be transmitted cannot be transmitted simultaneously through the allocated SL grant, then the second priority information of the SL CSI-RS can be equal to the minimum priority information of the data to be transmitted in the logical channel, that is, the second priority information can be determined based on the numerical value of the highest priority of the data to be transmitted in the logical channel.

[0161] It can be understood that in an embodiment of the present application, if there is no allocated transmission resource (allocated SL grant), then the second priority information of the SL CSI-RS can be equal to the minimum priority information of the data to be transmitted in the logical channel, that is, the second priority information can be determined based on the numerical value of the highest priority of the data to be transmitted in the logical channel.

[0162] That is to say, in an embodiment of the present application, the second priority information of the SL CSI-RS can be determined according to the data to be transmitted in the logical channel. Wherein, when the first terminal needs to send the SL CSI-RS or the MAC layer of the first terminal triggers resource selection (or reselection) for the SL CSI-RS transmission, one situation includes that the first terminal has triggered resource selection for the data to be transmitted in the logical channel, and allocated SL grant (i.e., allocated transmission resources), and the above-mentioned SL CSI-RS to be transmitted can be transmitted simultaneously with the data through the SL grant, then the priority information of the SL CSI-RS is equal to the priority information associated with the SL grant. Another situation includes that the first terminal has triggered resource selection for the data to be transmitted in the logical channel, and allocated SL grant (i.e., allocated transmission resources), and the above-mentioned SL CSI-RS to be transmitted cannot be transmitted simultaneously with the data through the SL grant, then the SL CSI-RS priority information is equal to the smallest priority information (i.e., the highest priority) among the data to be transmitted in the logical channel. Another situation includes that the first terminal does not trigger resource selection for the data to be transmitted in the logical channel, that is, there is no allocated SL grant, then the priority information of the SL CSI-RS is equal to the minimum priority information (that is, the highest priority) of the data to be transmitted in the terminal logical channel.

[0163] Furthermore, in an embodiment of the present application, if the second priority information is determined based on a second preset value, that is, for the case where the second priority information of the SL CSI-RS is determined according to the second preset value, the second priority information may be the second preset value.

[0164] For example, in some embodiments, the second preset value may be an integer greater than or equal to 1 and less than or equal to 8.

[0165] That is, in the example of the present application, the second priority information of the SL CSI-RS may be a default integer value, such as a second preset value, wherein the second preset value may be predefined or agreed upon by the standard.

[0166] For example, in some embodiments, the SL CSI-RS is set to the highest priority by default, that is, the second preset value is 1, and accordingly, the second priority information determined based on the second preset value is 1. The reason for this configuration is that the beam management mechanism in the millimeter wave system is the basis for ensuring communication reliability. If a suitable transceiver beam pair is not established between the transceiver terminals, normal data transmission cannot be successfully transmitted. Therefore, it is necessary to ensure the priority transmission of the SL CSI-RS.

[0167] Furthermore, in an embodiment of the present application, for multiple SL CSI-RSs sent in the same time slot, the corresponding second priority information is the same.

[0168] It can be understood that in an embodiment of the present application, if the first terminal sends multiple SL CSI-RS in a time slot, for example, multiple SL CSI-RS occupy multiple OFDM symbols in a time slot in a TDM manner, such as CSI-RS#0, CSI-RS#1, CSI-RS#2... in Figure 9, the priorities of the multiple SL CSI-RS should be the same, that is, multiple SL CSI-RS correspond to the same second priority information.

[0169] Furthermore, in an embodiment of the present application, the physical layer priority of the sidelink data is carried in the "priority" field in the SCI. Since compatibility with sidelink data communication needs to be considered in the shared resource pool (for example, SL CSI-RS resource selection also needs to consider the selected resources excluding sidelink data), the priority of SL CSI-RS (second priority information) is also carried by the "priority" field in the SCI sidelink control information.

[0170] It should be noted that, in the embodiment of the present application, for the second priority information with a value of 1-8, the overhead is 3 bits, and the indicated priority value is 1 to 8. For example, the second priority information indicated by the "priority" field value of "000" is "1", the second priority information indicated by the "priority" field value of "001" is "2", the second priority information indicated by the "priority" field value of "010" is "3", the second priority information indicated by the "priority" field value of "011" is "4", the second priority information indicated by the "priority" field value of "100" is "5", the second priority information indicated by the "priority" field value of "101" is "6", the second priority information indicated by the "priority" field value of "110" is "7", and the second priority information indicated by the "priority" field value of "111" is "8".

[0171] It can be understood that in the embodiments of the present application, for the priority of SL CSI-RS, the smaller the second priority information, that is, the smaller the priority value indicated by the priority information, the higher the corresponding priority, and the larger the second priority information, that is, the larger the priority value indicated by the priority information, the lower the corresponding priority.

[0172] It should be noted that in the embodiments of the present application, although the "priority" indication field can indicate eight priorities from 1 to 8, in some cases, the SL CSI-RS may only enable some of the values. For example, if the SL CSI-RS has only three priorities 1, 2, and 3, only the three bit indication combinations of "000", "001", and "011" in the "priority" field are used.

[0173] Further, in an embodiment of the present application, when SL CSI-RS and SL data are transmitted in the same time slot, the second priority information indicated by the first information is priority information corresponding to the beam application type or priority information of the SL data.

[0174] It should be noted that, in an embodiment of the present application, when SL CSI-RS and SL data are transmitted in the same time slot, if the priority information corresponding to the beam application type of SL CSI-RS is less than or equal to the priority information of SL data, then the second priority information indicated by the first information is the priority information corresponding to the beam application type of SL CSI-RS; if the priority information corresponding to the beam application type of SL CSI-RS is greater than the priority information of SL data, then the second priority information indicated by the first information is the priority information of SL data.

[0175] It can be understood that in an embodiment of the present application, after the priority information corresponding to the SL CSI-RS is preliminarily determined based on the preset mapping relationship between the application type and the priority information, if the SL CSI-RS and the SL data are transmitted in the same time slot, then the value indicated by the "priority" field in the first-order SCI carried in the PSCCH can be determined based on the priority information corresponding to the beam application type of the SL CSI-RS and the priority information of the SL data. Among them, the size of the priority information corresponding to the beam application type of the SL CSI-RS and the priority information of the SL data can be compared, and then the second priority information can be determined based on the smaller priority information of the two, that is, the second priority information indicated by the "priority" field in the SCI can be the minimum value of the priority information corresponding to the beam application type of the SL CSI-RS and the priority information of the SL data.

[0176] Furthermore, in an embodiment of the present application, for the first terminal, that is, the terminal that sends the SL CSI-RS, one or more information can be used to determine the SL CSI-RS priority information (second priority information) and the method for determining the carrying of the priority information.

[0177] Accordingly, in an embodiment of the present application, for the second terminal, that is, the terminal that receives the measured SL CSI-RS, when performing SL CSI-RS measurement, the second terminal determines the priority information of the measured SL CSI-RS based on the SCI associated with the measured SL CSI-RS. The association relationship between SCI and SL CSI-RS refers to the SCI transmitted in the same time slot as the SL CSI-RS.

[0178] Exemplarily, in some embodiments, for the second terminal, when determining the second priority information of the SL CSI-RS, the second priority information of the SL CSI-RS may be the priority information indicated by the SCI associated with the SL CSI-RS.

[0179] Furthermore, in an embodiment of the present application, if the first priority information is determined based on the second priority information corresponding to the SL CSI-RS, that is, in the case where the first priority information of the first PSFCH is determined based on the second priority information corresponding to the SL CSI-RS, the first priority information may be the second priority information corresponding to the SL CSI-RS. The beam reporting information carried by the first PSFCH includes beam reporting information corresponding to one SL CSI-RS.

[0180] Exemplarily, in some embodiments, FIG12 is a schematic diagram 1 of the association relationship between PSFCH and SL CSI-RS provided in an embodiment of the present application. As shown in FIG12 , a possible association relationship is that each SL CSI-RS is associated with a first PSFCH.

[0181] That is to say, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on the second priority information of the SL CSI-RS associated with the first PSFCH, if each SL CSI-RS is associated with a first PSFCH, that is, the first PSFCH and the SL CSI-RS are mapped one to one, then the first priority information of the first PSFCH is equal to the second priority information of the above-mentioned associated SL CSI-RS.

[0182] It can be understood that in an embodiment of the present application, after measuring each SL CSI-RS, the second terminal can decide whether to send the first PSFCH on the PSFCH occasion (PSFCH transmission opportunity) to which it is associated based on the first priority information of the first PSFCH, and the first priority information of the first PSFCH is equal to the second priority information of the associated SL CSI-RS. Accordingly, the first terminal can determine the corresponding first priority information based on the second priority information of the SL CSI-RS associated with the first PSFCH, thereby further deciding whether to receive the first PSFCH on the PSFCH occasion to which it is associated.

[0183] It should be noted that, in the embodiments of the present application, for the case where each SL CSI-RS is associated with a first PSFCH, if different SL CSI-RS are associated with the same first PSFCH, then the first PSFCH and the SL CSI-RS can be understood as a one-to-many mapping relationship, that is, although the first PSFCH only carries one beam reporting information corresponding to one SL CSI-R, the first PSFCH and the SL CSI-R can also be a one-to-many mapping relationship. At this time, the first priority information of the first PSFCH still needs to be determined based on the priority information of the SL CSI-RS it carries.

[0184] Furthermore, in an embodiment of the present application, if the first priority information is determined based on the second priority information corresponding to the SL CSI-RS, that is, for the case where the first priority information of the first PSFCH is determined based on the second priority information corresponding to the SL CSI-RS, the first priority information can be determined based on the minimum priority information among the multiple second priority information corresponding to the multiple SL CSI-RS. The beam reporting information carried by the first PSFCH includes multiple beam reporting information corresponding to multiple SL CSI-RSs.

[0185] Exemplarily, in some embodiments, FIG13 is a second schematic diagram of the association relationship between PSFCH and SL CSI-RS provided in an embodiment of the present application. As shown in FIG13 , a possible association relationship is that multiple SL CSI-RS are associated with one first PSFCH.

[0186] That is to say, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on the second priority information of the SL CSI-RS associated with the first PSFCH, if multiple SL CSI-RSs are associated with one first PSFCH, that is, the first PSFCH and the SL CSI-RS have a one-to-many mapping relationship, then the first priority information of the first PSFCH is equal to the minimum priority information among the multiple second priority information corresponding to the associated multiple SL CSI-RSs.

[0187] It can be understood that in an embodiment of the present application, after measuring multiple SL CSI-RS, the second terminal can decide whether to report the measurement result information related to one or more SL CSI-RS through the first PSFCH on the PSFCH occasion to which it is associated based on the first priority information of the first PSFCH. If the first PSFCH reports the measurement result information of multiple SL CSI-RS, the first priority information of the first PSFCH is equal to the smallest priority information among the multiple second priority information of the associated multiple SL CSI-RS. Accordingly, the first terminal can determine the corresponding first priority information based on the multiple second priority information of the multiple SL CSI-RS associated with the first PSFCH, and further decide whether to receive the first PSFCH on the PSFCH occasion to which it is associated.

[0188] It should be noted that in an embodiment of the present application, when reporting multiple SL CSI-RS related measurement result information through the first PSFCH, since the existing PSFCH format 0 cannot carry multi-bit information, it is necessary to introduce a new format for the first PSFCH so that it can carry multi-bit information.

[0189] It can be understood that in an embodiment of the present application, the first PSFCH can be a PSFCH carrying one or more beam reporting information, and the first priority information of the first PSFCH can be determined by the second priority information of the SL CSI-RS associated with the first PSFCH.

[0190] It should be noted that, in the embodiment of the present application, the first PSFCH is associated with the SL CSI-RS, which can be understood as the first PSFCH resource being associated with at least one information of the time domain, frequency domain, and code domain of the SL CSI-RS.

[0191] That is to say, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on the second priority information of the SL CSI-RS associated with the first PSFCH, if each SL CSI-RS is associated with a first PSFCH, that is, the first PSFCH and the SL CSI-RS have a one-to-one mapping relationship, then the priority information of the first PSFCH is equal to the priority information of the associated SL CSI-RS. If multiple SL CSI-RSs are associated with one first PSFCH, that is, the first PSFCH and the SL CSI-RS have a one-to-many mapping relationship, then the priority information of the first PSFCH is equal to the smallest priority information among the multiple second priority information of the associated multiple SL CSI-RSs.

[0192] It should also be noted that, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on the second priority information of the SL CSI-RS associated with the first PSFCH, for the case where one SL CSI-RS is associated with one first PSFCH, if multiple different SL CSI-RSs are associated with the same first PSFCH, then the first priority information of the first PSFCH still needs to be determined based on the priority information of the SL CSI-RS it carries.

[0193] Furthermore, in an embodiment of the present application, if the first priority information is determined based on a priority reference value, that is, in the case where the first priority information of the first PSFCH is determined according to the priority reference value, the first priority information can be determined according to the priority reference value indicated by the SCI associated with the SL CSI-RS.

[0194] For example, in some embodiments, the priority reference value may be an integer greater than or equal to 1 and less than or equal to 8.

[0195] Furthermore, in an embodiment of the present application, the first priority information is determined based on a priority reference value indicated by the SCI; wherein the first PSFCH is associated with an SCI.

[0196] That is to say, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on a priority reference value indicated by the SCI, if a first PSFCH is associated with an SCI, that is, the first PSFCH and the SCI have a one-to-one mapping relationship, then the first priority information of the first PSFCH is equal to a priority reference value indicated by the above-mentioned associated SCI.

[0197] It should be noted that, in the embodiment of the present application, for the case where each SCI is associated with a first PSFCH, if different SCIs are associated with the same first PSFCH, then the first PSFCH and the SCI can be understood as a one-to-many mapping relationship, that is, although one first PSFCH is associated with one SCI, the first PSFCH and the SCI can also be a one-to-many mapping relationship. At this time, the first priority information of the first PSFCH still needs to be determined according to the priority reference value indicated by the SCI associated with the SL CSI-RS it carries.

[0198] Furthermore, in an embodiment of the present application, the first priority information is determined based on minimum priority information among multiple priority reference values ​​indicated by multiple SCIs; wherein the first PSFCH is associated with multiple SCIs.

[0199] That is to say, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on a priority reference value indicated by the SCI, if a first PSFCH is associated with multiple SCIs, that is, the first PSFCH and the SCI have a one-to-many mapping relationship, then the first priority information of the first PSFCH is determined based on the minimum priority information among the multiple priority reference values ​​indicated by the multiple SCIs.

[0200] For example, in some embodiments, the second priority information of the SL CSI-RS may not be explicitly introduced, but the priority information (priority reference value) may be indicated by the SCI associated with the SL CSI-RS. In this case, the priority information of the first PSFCH can be determined based on the priority reference value indicated by the SCI associated with the first PSFCH.

[0201] For example, in some embodiments, the first PSFCH and the SCI may include two association relationships. If the first PSFCH is associated with one SCI, the priority information of the first PSFCH is equal to the priority reference value indicated by the associated SCI. If the first PSFCH is associated with multiple SCIs, the priority information of the first PSFCH is equal to the minimum priority information among the priority reference values ​​indicated by the multiple associated SCIs.

[0202] It should also be noted that, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on the priority reference value indicated by the SCI associated with the first PSFCH, for the case where one SCI is associated with one first PSFCH, if multiple different SCIs are associated with the same first PSFCH, then the first priority information of the first PSFCH still needs to be determined based on the priority reference value indicated by the SCI associated with the SL CSI-RS it carries.

[0203] It can be understood that in an embodiment of the present application, the priority reference value indicated by the SCI is determined according to the priority information indicated by the "priority" field in the SCI, for example, according to the priority information value indicated by the "priority" field in the SCI.

[0204] Furthermore, in an embodiment of the present application, if the first priority information is determined based on a first preset value, that is, for the case where the first priority information of the first PSFCH is determined according to the first preset value, the first priority information may be the first preset value.

[0205] For example, in some embodiments, the first preset value may be an integer greater than or equal to 1 and less than or equal to 8.

[0206] That is, in the example of the present application, the first priority information of the first PSFCH may be a default integer value, such as a first preset value, wherein the first preset value may be predefined or agreed upon by a standard.

[0207] For example, in some embodiments, the first priority information of the first PSFCH is set to the highest priority by default, that is, the first preset value is 1. Accordingly, the first priority information determined based on the first preset value is 1. An advantage of such a configuration is that the first terminal or the second terminal preferentially processes the first PSFCH among multiple types of PSFCHs, so as to ensure the effectiveness of the beam management mechanism in the FR2 frequency band, thereby ensuring communication reliability.

[0208] That is, in an embodiment of the present application, the first terminal may first determine the first priority information of the first PSFCH, and then may receive the beam reporting information carried by the first PSFCH based on the first priority information. The first priority information may be determined based on one or more of the following information: the second priority information of the SL CSI-RS, a priority reference value, and a first preset value.

[0209] Accordingly, in an embodiment of the present application, the second terminal may first determine the first priority information of the first PSFCH, and then may send the beam reporting information carried by the first PSFCH based on the first priority information. The first priority information may be determined based on one or more of the following information: the second priority information of the SL CSI-RS, a priority reference value, and a first preset value.

[0210] Thus, in the embodiment of the present application, the method for determining the first priority information of the first PSFCH can be applied to the first terminal or the second terminal. This embodiment of the present application does not specifically limit this.

[0211] Furthermore, in an embodiment of the present application, when the first terminal receives the beam reporting information carried by the first PSFCH based on the first priority corresponding to the first PSFCH, the first terminal can receive the beam reporting information carried by the first PSFCH based on the first priority information and the PSFCH status.

[0212] That is to say, in an embodiment of the present application, when receiving beam reporting information, the first terminal can choose to receive the beam reporting information carried by the first PSFCH based on the first priority information and PSFCH status of the first PSFCH.

[0213] It should be noted that, in the embodiments of the present application, the PSFCH state includes a sending state or a receiving state.

[0214] Furthermore, in an embodiment of the present application, the PSFCH state can be determined based on a preset processing order of the PSFCH and a first PSFCH set; wherein the preset processing order of the PSFCH includes processing the first PSFCH first, or processing the first PSFCH last; the first PSFCH set includes one or more first PSFCHs to be sent, and / or one or more first PSFCHs to be received.

[0215] It should be noted that in an embodiment of the present application, in the SL system, there may be multiple different types of PSFCHs that need to be sent / received simultaneously on a PSFCH occasion in the resource pool, wherein at least one or more of the following types of PSFCHs may exist on a PSFCH occasion: a PSFCH carrying the correct response instruction (ACKnowledge, ACK) information of the hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ), a PSFCH carrying resource conflict information, and a first PSFCH.

[0216] It can be understood that in an embodiment of the present application, the preset processing order of PSFCH can indicate the processing order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH.

[0217] Exemplarily, in some embodiments, the preset processing order of PSFCHs may indicate that the first PSFCH is processed first. Specifically, the following are the cases where a PSFCH carrying HARQ-ACK information and a PSFCH carrying resource conflict information coexist, and the first PSFCH is processed first; another case where a PSFCH carrying HARQ-ACK information coexists, and the first PSFCH is processed first; another case where a PSFCH carrying resource conflict information coexists, and the first PSFCH is processed first; the processing order between the two cases; and another case where only the first PSFCH exists, and the first PSFCH is processed.

[0218] Exemplarily, in some embodiments, the preset processing order of PSFCHs may indicate that the first PSFCH is processed last. Specifically, the following situations are discussed: one situation is that a PSFCH carrying HARQ-ACK information, a PSFCH carrying resource conflict information, and the first PSFCH are simultaneously present, and the first PSFCH is processed last; another situation is that a PSFCH carrying HARQ-ACK information and the first PSFCH are simultaneously present, and the first PSFCH is processed last; another situation is that a PSFCH carrying resource conflict information and the first PSFCH are simultaneously present, and the first PSFCH is processed last; another situation is that a PSFCH carrying resource conflict information and the first PSFCH are simultaneously present, and the first PSFCH is processed last; another situation is that only the first PSFCH exists, and the first PSFCH is processed.

[0219] It should be noted that in an embodiment of the present application, the preset processing order of PSFCH can also indicate any processing order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH, and this application does not make specific limitations.

[0220] It should be noted that in the embodiments of the present application, in the SL system, in any PSFCH occasion in the resource pool, there may be both a PSFCH to be sent and a PSFCH to be received. However, due to the half-duplex limitation, only one PSFCH state can be selected in the sending state or the receiving state to perform related PSFCH operations.

[0221] For example, in some embodiments, if there are both a PSFCH carrying HARQ-ACK information and a PSFCH carrying resource conflict information, the PSFCH state can be first determined as a sending state or a receiving state based on the content of the PSFCH carrying information and the PSFCH priority information.

[0222] For example, in some embodiments, if there are both a PSFCH carrying HARQ-ACK information and a PSFCH carrying resource conflict information, when determining the PSFCH state, the PSFCH state can be determined as a sending state or a receiving state based on the state corresponding to the PSFCH with the smallest priority information associated with it in the PSFCH set carrying the HARQ-ACK information.

[0223] Exemplarily, in some embodiments, if there is no PSFCH carrying HARQ-ACK information, but there is a PSFCH carrying conflict information, then the PSFCH state corresponding to the PSFCH with the smallest priority information associated in the PSFCH set carrying conflict information is a sending state or a receiving state.

[0224] It should be noted that, in the embodiment of the present application, the first PSFCH set may include one or more first PSFCHs to be sent, and / or one or more first PSFCHs to be received.

[0225] That is, in an embodiment of the present application, in the SL system, there may be multiple different types of PSFCHs on a PSFCH occasion in a resource pool, and each type of PSFCH may include one or more PSFCHs to be received or to be sent, and the one or more PSFCHs to be received or to be sent may constitute a PSFCH set of this type of PSFCH.

[0226] Accordingly, in an embodiment of the present application, when the first terminal receives the beam reporting information carried by the first PSFCH, it can choose to first determine the PSFCH status according to the preset processing order of the PSFCH and the first PSFCH set, and then receive the beam reporting information according to the first priority information of the first PSFCH and the PSFCH status.

[0227] It should be noted that, in an embodiment of the present application, when determining the PSFCH state based on the preset processing order of the PSFCH and the first PSFCH set, if the preset processing order of the PSFCH indicates that the first PSFCH has the highest priority, that is, the preset processing order of the PSFCH indicates that the first PSFCH is processed first, then for one or more first PSFCHs to be sent in the first PSFCH set, and / or one or more first PSFCHs to be received, the first priority information of each first PSFCH can be determined first. If the first PSFCH with the smallest first priority information in the first PSFCH set is the first PSFCH to be sent, then the PSFCH state can be determined to be the sending state. Conversely, if the first PSFCH with the smallest first priority information in the first PSFCH set is the first PSFCH to be received, then the PSFCH state can be determined to be the receiving state.

[0228] That is to say, in an embodiment of the present application, if the preset processing order of PSFCH indicates that the first PSFCH is processed first, then only when the first PSFCH corresponding to the smallest first priority information in the first PSFCH set is the first PSFCH to be received, can the PSFCH state be determined to be the receiving state. At this time, the first terminal can receive the first PSFCH on this PSFCH occasion.

[0229] Exemplarily, in some embodiments, if the first PSFCH has the highest priority, and if there is a first PSFCH to be sent or received, the first PSFCH can be processed first. If there is a first PSFCH to be sent and / or to be received, a first priority information set and / or a second priority information set can be determined, wherein the first priority information set is associated with the set of first PSFCHs to be sent, and the second priority information set is associated with the set of first PSFCHs to be received. The sending or receiving of the PSFCH can be determined based on the first PSFCH corresponding to the smallest priority information in the first priority information set and / or the second priority information set. Specifically, if the above-mentioned first PSFCH is a PSFCH to be sent by the terminal, the terminal sends one or more PSFCHs on this PSFCH occasion; if the above-mentioned first PSFCH is a PSFCH to be received by the terminal, the terminal receives one or more PSFCHs on this PSFCH occasion.

[0230] It should be noted that, in an embodiment of the present application, when determining the PSFCH state based on the preset processing order of the PSFCH and the first PSFCH set, if the preset processing order of the PSFCH indicates that the first PSFCH has the lowest priority, that is, the preset processing order of the PSFCH indicates that the first PSFCH is processed last, then the PSFCH state can be determined as a sending state or a receiving state based on the PSFCH priority information corresponding to the PSFCH carrying HARQ-ACK information and / or the PSFCH carrying resource conflict information.

[0231] That is to say, in an embodiment of the present application, if the preset processing order of PSFCH indicates that the first PSFCH is processed last, then the PSFCH status will no longer be determined based on the first priority information of the first PSFCH, and the first PSFCH will be processed after the PSFCH carrying HARQ-ACK information and / or the PSFCH carrying resource conflict information is processed.

[0232] It should be noted that in an embodiment of the present application, if only the first PSFCH exists, that is, only the first PSFCH is processed, then for one or more first PSFCHs to be sent in the first PSFCH set, and / or one or more first PSFCHs to be received, the first priority information of each first PSFCH can be determined first. If the first PSFCH with the smallest first priority information in the first PSFCH set is the first PSFCH to be sent, then the PSFCH state can be determined to be the sending state. Conversely, if the first PSFCH with the smallest first priority information in the first PSFCH set is the first PSFCH to be received, then the PSFCH state can be determined to be the receiving state.

[0233] That is to say, in an embodiment of the present application, if there is only the first PSFCH, then only when the first PSFCH corresponding to the smallest first priority information in the first PSFCH set is the first PSFCH to be received, can the PSFCH state be determined to be the receiving state. At this time, the first terminal can receive the first PSFCH on this PSFCH occasion.

[0234] Exemplarily, in some embodiments, if the first PSFCH has the lowest priority, then the PSFCH state will be determined based on the first priority information of the first PSFCH only when no other type of PSFCH exists. If a first PSFCH is to be sent or received, the first PSFCH can be processed with priority. If a first PSFCH is to be sent and / or received, a first priority information set and / or a second priority information set can be determined, wherein the first priority information set is associated with the set of first PSFCHs to be sent, and the second priority information set is associated with the set of first PSFCHs to be received. Whether to send or receive the PSFCH can be determined based on the first PSFCH corresponding to the smallest priority information in the first priority information set and / or the second priority information set. Specifically, if the first PSFCH is a PSFCH to be sent by the terminal, the terminal sends one or more PSFCHs on this PSFCH occasion; if the first PSFCH is a PSFCH to be received by the terminal, the terminal receives one or more PSFCHs on this PSFCH occasion.

[0235] Exemplarily, in some embodiments, if the priority of the first PSFCH is second only to the PSFCH carrying HARQ-ACK information, and if there is no PSFCH carrying HARQ-ACK to be sent or received, the PSFCH state is determined based on the first priority information of the first PSFCH. If there is a first PSFCH to be sent or received, the first PSFCH can be processed with priority. If there is a first PSFCH to be sent and / or received, a first priority information set and / or a second priority information set can be determined, wherein the first priority information set is associated with the set of first PSFCHs to be sent, and the second priority information set is associated with the set of first PSFCHs to be received. Whether to send or receive the PSFCH can be determined based on the first PSFCH corresponding to the smallest priority information in the first priority information set and / or the second priority information set. Specifically, if the first PSFCH is a PSFCH to be sent by the terminal, the terminal sends one or more PSFCHs on this PSFCH occasion; if the first PSFCH is a PSFCH to be received by the terminal, the terminal receives one or more PSFCHs on this PSFCH occasion.

[0236] That is to say, in an embodiment of the present application, whether it is the first terminal or the second terminal, when receiving or sending PSFCH on the PSFCH occasion, the PSFCH state can be first determined according to the priority data of the PSFCH. If the PSFCH state is the sending state, the PSFCH can be sent on the PSFCH occasion. If the PSFCH state is the receiving state, the PSFCH can be received on the PSFCH occasion.

[0237] Furthermore, in an embodiment of the present application, when the first terminal receives the beam reporting information carried by the first PSFCH based on the first priority corresponding to the first PSFCH, the first terminal can receive the beam reporting information carried by the first PSFCH based on one or more of the first priority information, the preset reception order of the PSFCH, and the PSFCH reception number threshold.

[0238] That is to say, in an embodiment of the present application, when receiving beam reporting information, the first terminal may refer to one or more of the following information: the first priority information of the first PSFCH, the preset receiving order of the PSFCH, and the PSFCH receiving quantity threshold.

[0239] It should be noted that, in the embodiment of the present application, the PSFCH reception number threshold represents the upper limit number N of PSFCH transmission opportunities corresponding to the SL CSI-RS that can simultaneously receive PSFCHs, where N is an integer greater than 0.

[0240] It should be noted that, in an embodiment of the present application, the preset reception order of the PSFCH may indicate the reception order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH.

[0241] Exemplarily, in some embodiments, the preset reception order of PSFCH may indicate that the first PSFCH is received first, which specifically includes: one situation is that there are PSFCH carrying HARQ-ACK information, PSFCH carrying resource conflict information, and the first PSFCH at the same time, and the first PSFCH is received first; another situation is that there are PSFCH carrying HARQ-ACK information and the first PSFCH at the same time, and the first PSFCH is received first; another situation is that there are PSFCH carrying resource conflict information and the first PSFCH at the same time, and the first PSFCH is received first; the processing order between them; and another situation is that only the first PSFCH exists, and the first PSFCH is received.

[0242] Exemplarily, in some embodiments, the preset reception order of PSFCH may indicate that the first PSFCH is received last, which specifically includes: one situation is that there are PSFCH carrying HARQ-ACK information, PSFCH carrying resource conflict information, and the first PSFCH at the same time, and the first PSFCH is received last; another situation is that there are PSFCH carrying HARQ-ACK information, the first PSFCH at the same time, and the first PSFCH is received last; another situation is that there are PSFCH carrying resource conflict information, the first PSFCH at the same time, and the first PSFCH is received last; the processing order in between; and another situation is that only the first PSFCH exists, and the first PSFCH is received.

[0243] It should be noted that in an embodiment of the present application, the preset reception order of PSFCH can also indicate any reception order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH, and this application does not make specific limitations.

[0244] Furthermore, in an embodiment of the present application, after determining the PSFCH state, if the PSFCH state is a receiving state, then the PSFCH can be selected to be received in a PSFCH transmission opportunity (PSFCH occasion) corresponding to the SL CSI-RS. Specifically, the first terminal can receive the first PSFCH carrying beam reporting information according to one or more of the first priority information, the preset reception order of the PSFCH, and the PSFCH reception quantity threshold.

[0245] It can be understood that in the embodiments of the present application, since the maximum number of multiple PSFCHs that can be received simultaneously by the first terminal is limited, if a certain number limit is exceeded, the first terminal cannot complete the reception processing of all PSFCHs to be received and can only choose to receive some of the PSFCHs.

[0246] Exemplarily, in some embodiments, the number of PSFCHs to be received by the first terminal is N sch，Rx，PSFCH The maximum number of PSFCHs supported by the first terminal to be received simultaneously (PSFCH reception number threshold) is N max，PSFCH , the number of PSFCHs finally transmitted by the first terminal is N Rx，PSFCH , if N sch，Rx，PSFCH >N max，PSFCH , then N Rx，PSFCH =N max，PSFCH ; If N sch，Rx，PSFCH ≤N Max，PSFCH , then N Rx，PSFCH =N sch，Rx，PSFCH .

[0247] It can be understood that in an embodiment of the present application, since one or more types of PSFCHs including a PSFCH carrying HARQ-ACK information, and / or a PSFCH carrying resource conflict information, and / or a first PSFCH may exist on a PSFCH occasion, it is also necessary to further limit the PSFCH received by the first terminal according to the preset reception order of the PSFCH.

[0248] That is, in the embodiment of the present application, considering that there may be multiple types of PSFCHs to be received and the maximum capability of receiving multiple PSFCHs at the same time, the N Rx，PSFCH Among the PSFCHs, the first terminal may receive the first PSFCH based on one or more of the first priority information, a preset reception order of the PSFCHs, and a PSFCH reception quantity threshold.

[0249] Furthermore, in an embodiment of the present application, when the preset reception order of PSFCH indicates that the first PSFCH is received first, and the number of first PSFCHs to be received is greater than N, the first terminal receives beam reporting information based on the N first PSFCHs to be received with the smallest priority information.

[0250] It should be noted that, in an embodiment of the present application, if the preset reception order of the PSFCH indicates that the first PSFCH is to be received first, then the first terminal may preferentially receive the first PSFCH. Specifically, if the number of first PSFCHs to be received exceeds the PSFCH reception number threshold, that is, the number of first PSFCHs to be received is greater than N, then the first terminal may preferentially receive the N first PSFCHs with the smallest first priority information, thereby receiving beam reporting information through the N first PSFCHs to be received.

[0251] Exemplarily, in some embodiments, FIG14 is a schematic diagram of an implementation of receiving the first PSFCH provided by an embodiment of the present application. As shown in FIG14 , the total number of three types of PSFCHs to be received by the first terminal is 8, and the maximum number of PSFCHs supported by the first terminal for simultaneous reception is 4, that is, the number of PSFCHs that the first terminal can receive simultaneously should be 4. At this time, if the preset reception order of the PSFCH indicates that the first PSFCH is received first, then only after all the first PSFCHs are received will other types of PSFCHs be considered for reception. Since the number of first PSFCHs to be received is 5, it is impossible to receive all the first PSFCHs. At this time, the first PSFCHs to be received are selected in ascending order of priority information (such as priority value), and the first PSFCHs that can be received in the end are the first PSFCHs whose first priority information (such as first priority value) is 1, 3, 4, and 6.

[0252] Furthermore, in an embodiment of the present application, when the preset reception order of PSFCH indicates priority reception of the first PSFCH, and the number of first PSFCHs to be received is less than or equal to N, the first terminal receives beam reporting information based on all first PSFCHs to be received.

[0253] It should be noted that, in an embodiment of the present application, if the preset reception order of the PSFCH indicates that the first PSFCH is to be received first, then the first terminal may preferentially receive the first PSFCH. Specifically, if the number of first PSFCHs to be received is less than or equal to the PSFCH reception number threshold, that is, the number of first PSFCHs to be received is less than or equal to N, then the first terminal may directly receive all first PSFCHs to be received, thereby receiving beam reporting information through the first PSFCHs to be received.

[0254] Exemplarily, in some embodiments, FIG15 is a second schematic diagram of an implementation of receiving the first PSFCH provided by an embodiment of the present application. As shown in FIG15 , the total number of three types of PSFCHs to be received by the first terminal is 8, and the maximum number of PSFCHs supported by the first terminal for simultaneous reception is 5, that is, the number of PSFCHs that the first terminal can receive simultaneously should be 5. At this time, if the preset reception order of the PSFCH indicates that the first PSFCH is received first, then only after all the first PSFCHs are received will other types of PSFCHs be considered for reception. Since the number of first PSFCHs to be received is 5, only all the first PSFCHs can be received simultaneously. At this time, the first terminal chooses to receive all 5 first PSFCHs.

[0255] Furthermore, in an embodiment of the present application, when the preset reception order of PSFCH indicates priority reception of PSFCH carrying HARQ-ACK information and PSFCH carrying resource conflict information, and the number Q of PSFCHs to be received is less than or equal to N, the first terminal receives beam reporting information based on the NQ first PSFCHs to be received with the smallest priority information; wherein Q is an integer greater than 0.

[0256] It should be noted that, in an embodiment of the present application, if the preset reception order of the PSFCH indicates that the first PSFCH is received last, then the first terminal may give priority to receiving other types of PSFCHs to be received other than the first PSFCH. Specifically, if the number Q of other types of PSFCHs to be received other than the first PSFCH is less than or equal to N, then the first terminal may also choose to receive NQ first PSFCHs to be received with the smallest first priority information while receiving Q other types of PSFCHs to be received, thereby receiving beam reporting information through the NQ first PSFCHs to be received.

[0257] Exemplarily, in some embodiments, FIG16 is a third implementation diagram of receiving the first PSFCH provided by an embodiment of the present application. As shown in FIG16 , the total number of three types of PSFCHs to be received by the first terminal is 8, and the maximum number of PSFCHs supported by the first terminal for simultaneous reception is 4, that is, the number of PSFCHs that the first terminal can receive simultaneously should be 4. At this time, if the preset reception order of the PSFCH indicates that the first PSFCH is received last, then priority will be given to receiving other types of PSFCHs to be received except the first PSFCH. If the first PSFCH is still allowed to be received, then the first PSFCH can be selected in ascending order of priority information. For example, the first PSFCH with the first priority information (first priority value) of 1 is selected last.

[0258] That is to say, in an embodiment of the present application, when the first terminal receives PSFCH, on the one hand, the PSFCH reception number threshold will limit the maximum number of multiple PSFCHs received simultaneously, and on the other hand, the preset reception order of PSFCH will limit the order of receiving different types of PSFCHs.

[0259] Accordingly, in an embodiment of the present application, when the second terminal sends a PSFCH, it is necessary to limit the maximum number of PSFCHs sent simultaneously based on the PSFCH transmission quantity threshold, and it is also necessary to limit the order of sending different types of PSFCHs based on the preset transmission order of the PSFCH. The second terminal can refer to the principles and methods of receiving the PSFCH by the first terminal to send the PSFCH.

[0260] In summary, the side link communication method proposed in the embodiment of the present application completes the transmission of the reporting beam reporting information by introducing the priority of the PSFCH associated with the SL CSI-RS, wherein the priority information of the PSFCH can refer to the priority information of the SL CSI-RS, or can refer to the priority information indicated by the SCI, or can refer to the pre-set priority information. Accordingly, on the basis of introducing the priority of the PSFCH associated with the SL CSI-RS, the PSFCH sending / receiving process is further optimized accordingly, and the relevant mechanism of the terminal sending and receiving PSFCH is improved, thereby ensuring the effectiveness of the beam management mechanism.

[0261] The embodiment of the present application proposes a side link communication scheme, in which a first terminal receives beam reporting information sent by a second terminal; wherein the beam reporting information includes beam reporting information corresponding to the SL CSI-RS, and the first terminal receives the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH. That is to say, in the embodiment of the present application, for the PSFCH carrying the beam reporting information corresponding to the SL CSI-RS, the priority information corresponding to the PSFCH can be introduced, so that the priority information of the PSFCH can be used to receive or send the beam reporting information. It can be seen that the embodiment of the present application further optimizes the PSFCH sending / receiving mechanism by determining the priority information of the PSFCH associated with the SL CSI-RS, improves the relevant mechanism of the terminal sending and receiving PSFCH, thereby ensuring the effectiveness of the beam management mechanism, and further improving the communication reliability.

[0262] An embodiment of the present application provides a sidelink communication method, which can be applied to a second terminal, wherein the second terminal can be a sidelink terminal, and the second terminal and the first terminal can be different sidelink terminals.

[0263] It should be noted that, in the embodiments of the present application, the second terminal may be a terminal in a sidewalk system, which is not specifically limited in the present application. For example, the second terminal may be a sidewalk terminal in a sidewalk millimeter wave transmission system.

[0264] Furthermore, in an embodiment of the present application, FIG17 is a second schematic diagram of a flow chart for implementing a sidelink communication method provided in an embodiment of the present application. As shown in FIG17 , the sidelink communication method may include the following steps:

[0265] Step 201: The second terminal sends beam reporting information to the first terminal; wherein the beam reporting information includes beam reporting information corresponding to the SL CSI-RS, and the second terminal sends the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH.

[0266] In an embodiment of the present application, the second terminal may send beam reporting information to the first terminal. Specifically, the second terminal may send beam reporting information carried by the first PSFCH to the second terminal based on the first priority information corresponding to the first PSFCH.

[0267] It should be noted that, in the embodiments of the present application, the first priority information can be used to determine the priority of the first PSFCH. The present application does not specifically limit the form of the first priority information. For example, the first priority information can be the priority value of the first PSFCH, or a parameter indicating the priority value of the first PSFCH.

[0268] That is to say, in an embodiment of the present application, corresponding first priority information can be introduced for the first PSFCH, for example, the priority value of the first PSFCH, so that in the subsequent PSFCH transmission and reception process, the transmission and reception status and the number of PSFCH transmissions and receptions can be determined based on the first priority information of the first PSFCH, thereby ensuring the effectiveness of the beam management mechanism.

[0269] It should be noted that, in the embodiments of the present application, the larger the priority information, that is, the larger the priority value indicated by the priority information, the lower the priority, and the smaller the priority information, that is, the smaller the priority value indicated by the priority information, the higher the priority. In other words, the larger the priority value, the lower the priority, and the smaller the priority value, the higher the priority.

[0270] Exemplarily, in some embodiments, the first priority information may be an integer greater than or equal to 1 and less than or equal to 8. When the first priority information is 1, the corresponding first PSFCH has the highest priority; and when the first priority information is 8, the corresponding first PSFCH has the lowest priority.

[0271] That is to say, in an embodiment of the present application, when the first priority information is the priority value of the first PSFCH, the first priority information can be in the value range of 1-8. This is because the priority information of the SL data service includes eight priorities from 1 to 8, and the first priority information should also be within this range.

[0272] It is understandable that in an embodiment of the present application, the beam reporting information may include beam reporting information corresponding to the SL CSI-RS. The first terminal sends the SL CSI-RS to the second terminal, and the second terminal may use any reporting method when reporting after the measurement is completed. For example, the beam reporting information may be reported directly; a threshold value may be preset, and when the measurement result is greater than the threshold value, 1 bit of indication information may be reported; or 1 bit of indication information may be reported each time the measurement result is greater than all previous measurement results.

[0273] That is to say, in an embodiment of the present application, the information carried by the first PSFCH may be information of various contents, for example, it may carry beam reporting information corresponding to the SL CSI-RS, and this application does not make specific limitations.

[0274] It should be noted that, in the embodiments of the present application, the first terminal and the second terminal may be different sideline terminals, which is not specifically limited in the present application. For example, the first terminal may be a sideline terminal in a sideline millimeter wave transmission system.

[0275] Furthermore, in an embodiment of the present application, the first priority information may be determined based on one or more of the following information: second priority information of the SL CSI-RS, a priority reference value, and a first preset value.

[0276] It should be noted that, in the embodiments of the present application, the first priority information corresponding to the first PSFCH can be determined in a variety of ways. Among them, the first priority information can be determined based on the second priority information of the SL CSI-RS, or based on the priority reference value indicated by the SCI, or based on the first preset value, or based on a combination of the second priority information, the priority reference value, and the first preset value, which is not specifically limited in this application.

[0277] Furthermore, in an embodiment of the present application, the second terminal may first receive the first information sent by the first terminal; wherein the first information may be used to indicate the second priority information of the SL CSI-RS.

[0278] It should be noted that, in the embodiments of the present application, the second priority information can be used to determine the priority of the SL CSI-RS. The present application does not specifically limit the form of the second priority information. For example, the second priority information can be the priority value of the SL CSI-RS or a parameter indicating the priority value of the SL CSI-RS.

[0279] That is to say, in an embodiment of the present application, corresponding second priority information can be introduced for the SL CSI-RS, for example, the priority value of the SL CSI-RS, so that the first priority information corresponding to the first PSFCH associated with the SL CSI-RS can be further determined, and then in the subsequent PSFCH reception and transmission process, the reception and transmission status and the number of PSFCH reception and transmission can be determined based on the first priority information of the first PSFCH, thereby ensuring the effectiveness of the beam management mechanism.

[0280] Exemplarily, in some embodiments, the second priority information may be an integer greater than or equal to 1 and less than or equal to 8. When the second priority information is 1, the corresponding SL CSI-RS has the highest priority; and when the second priority information is 8, the corresponding SL CSI-RS has the lowest priority.

[0281] That is to say, in an embodiment of the present application, when the second priority information is the priority value of SL CSI-RS, the second priority information can be in the value range of 1-8. This is because the priority information of SL data services includes eight priorities from 1 to 8. In order to ensure the compatibility and comparability of sidelink data transmission and SL CSI-RS transmission in the same resource pool, the priority information of SL CSI-RS should also be within this range.

[0282] It should be noted that, in an embodiment of the present application, the second terminal may receive the first information sent by the first terminal; wherein the first information is carried in the first signaling associated with the SL CSI-RS, and the first signaling may include the SCI.

[0283] Exemplarily, in some embodiments, the first signaling carrying the first information may include a first-order SCI, wherein the first-order SCI may be used to indicate information such as PSSCH transmission resources, reserved resource information, modulation and coding strategy MCS level, priority information (such as second priority information), etc.

[0284] It can be understood that, in the embodiment of the present application, the first signaling is carried on the first physical sidewalk channel, and the first physical sidewalk channel may include a PSCCH.

[0285] That is, in an embodiment of the present application, the second terminal may receive the first information sent by the first terminal, where the first information is carried on the first-order SCI, and the first-order SCI is carried on the PSCCH.

[0286] Furthermore, in an embodiment of the present application, one or more SL CSI-RSs and the first signaling are transmitted in the same time slot.

[0287] It should be noted that, in an embodiment of the present application, the second terminal may receive one or more SL CSI-RSs sent by the first terminal, and the one or more SL CSI-RSs and the SCI carrying the first information may be transmitted in the same time slot.

[0288] Exemplarily, in some embodiments, in a sideways millimeter wave transmission system, due to the existence of different beam directions, it is necessary to indirectly indicate the corresponding beam by indicating a reference signal associated with the beam. The reference signal may be an SL CSI-RS. Each SL CSI-RS may have corresponding index information, and different SL CSI-RS may correspond to different beam directions. For example, when selecting a transmit beam, the first terminal may use different beams to poll different SL CSI-RS resources, and the second terminal may receive the multiple SL CSI-RSs respectively and perform measurements. One or more SL CSI-RS resources may be selected based on the measurement results, and the selected SL CSI-RS resource index information may be reported to the transmitting terminal. The first terminal may select a better SL CSI-RS from the reported one or more SL CSI-RS resources, and select its corresponding transmit beam as the optimal transmit beam. Accordingly, when selecting a receiving beam, the second terminal can use the selected optimal transmitting beam to send the associated SL CSI-RS multiple times, and the first terminal uses different receiving beams for polling reception and measurement. According to the measurement results, the second terminal selects a better receiving beam as the receiving beam corresponding to the transmitting beam.

[0289] Furthermore, in an embodiment of the present application, the second priority information can be determined based on one or more of the following information: a preset mapping relationship between application type and priority information, priority information associated with allocated transmission resources, priority information of data to be transmitted, and a second preset value.

[0290] It should be noted that, in the embodiments of the present application, the second priority information corresponding to the SL CSI-RS can be determined in a variety of ways. Among them, the second priority information can be determined based on the preset mapping relationship between the application type and the priority information, or based on the priority information associated with the allocated transmission resources, or based on the priority information of the data to be transmitted, or based on the second preset value, or based on the preset mapping relationship between the application type and the priority information, the priority information associated with the allocated transmission resources, the priority information of the data to be transmitted, or the second preset value. The present application does not make specific limitations.

[0291] Furthermore, in an embodiment of the present application, a preset mapping relationship between application type and priority information is used to determine the correspondence between beam application type and priority information. The correspondence between beam application type and priority information can be one beam application type corresponding to one priority information, or one beam application type corresponding to multiple priority information. That is, the mapping relationship between beam application type and priority information can be one-to-one or one-to-many, and this application does not specifically limit this.

[0292] That is to say, in the examples of the present application, the relationship between the purpose of sending SL CSI-RS and the priority information of SL CSI-RS is a one-to-one mapping relationship or a one-to-many mapping relationship, and the priority information mapped for different purposes can be the same, different, or partially the same.

[0293] It should be noted that, in the embodiments of the present application, the beam application type includes one or more of the following types: initial beam pairing, beam maintenance, beam failure recovery, and candidate transmit beam selection.

[0294] It should be noted that in the embodiments of the present application, the beam application type can be used to characterize the purpose of sending SL CSI-RS, that is, the purpose of sending SL CSI-RS can include initial beam pairing, beam maintenance, beam failure recovery and candidate transmission beam selection.

[0295] It is understood that in embodiments of the present application, beam maintenance may include transmit beam selection and receive beam selection. That is, beam application types include, but are not limited to, one or more of the following: initial beam pairing, transmit beam selection, receive beam selection, beam failure recovery, and candidate transmit beam selection.

[0296] Furthermore, in an embodiment of the present application, if the second priority information is determined based on a preset mapping relationship between the application type and the priority information, that is, for the case where the second priority information of the SL CSI-RS is determined according to the purpose of sending the SL CSI-RS, the second priority information is the priority information corresponding to the beam application type of the SL CSI-RS, which is determined based on the preset mapping relationship between the application type and the priority information.

[0297] It should be noted that, in an embodiment of the present application, if the beam application type corresponding to the SL CSI-RS corresponds to multiple priority information, the second priority information finally determined may be one of the multiple priority information. The selection principle of the second priority information may be random selection or depend on the terminal implementation.

[0298] Exemplarily, in some embodiments, assuming that the preset mapping relationship between the application type and the priority information is used to determine a priority information corresponding to the beam application type, that is, there is a one-to-one mapping relationship between the beam application type and the priority information, then it can be determined that the purpose of sending the SL CSI-RS and the SL CSI-RS priority information are a one-to-one mapping relationship. The preset mapping relationship between the application type and the priority information can be shown in Table 3:

[0299] Table 3

[0300] Based on Table 3, assuming that the beam application type corresponding to the SL CSI-RS is initial beam pairing, the corresponding second priority information can be 1, which has the highest priority. That is, if the purpose of sending the SL CSI-RS is initial beam pairing, then the SL CSI-RS has the highest priority.

[0301] Exemplarily, in some embodiments, assuming that the preset mapping relationship between the application type and the priority information is used to determine multiple priority information corresponding to the beam application type, that is, the beam application type and the priority information are in a one-to-many mapping relationship, then it can be determined that the purpose of sending the SL CSI-RS and the SL CSI-RS priority information are in a one-to-many mapping relationship. The preset mapping relationship between the application type and the priority information can be shown in Table 4:

[0302] Table 4

[0303] Based on Table 4, assuming that the beam application type corresponding to the SL CSI-RS is initial beam pairing, the corresponding second priority information can be 1 or 2. That is, if the purpose of sending the SL CSI-RS is initial beam pairing, the second priority information of the SL CSI-RS can be selected from 1 or 2. The selection method among the multiple priorities is uniform random selection, or depends on the terminal implementation.

[0304] Furthermore, in an embodiment of the present application, if the second priority information is determined based on priority information associated with allocated transmission resources, that is, in the case where the second priority information of the SL CSI-RS is determined based on priority information associated with allocated transmission resources, the second priority information may be priority information associated with the allocated transmission resources. The allocated transmission resources (allocated SL grant) are used to simultaneously transmit the SL CSI-RS and SL data.

[0305] It can be understood that in an embodiment of the present application, if the SL CSI-RS to be transmitted is transmitted simultaneously with the SL data through the allocated SL grant, then the second priority information of the SL CSI-RS can be equal to the priority information associated with the allocated SL grant.

[0306] It should be noted that, in the embodiments of the present application, the priority information associated with the allocated transmission resources can be used to determine the priority of the allocated transmission resources. The present application does not specifically limit the form of the priority information. For example, the priority information can be a priority value of the allocated transmission resources, or a parameter indicating the priority value of the allocated transmission resources.

[0307] Furthermore, in an embodiment of the present application, if the second priority information is determined based on the priority information corresponding to the data to be transmitted in the logical channel, that is, for the case where the second priority information of the SL CSI-RS is determined based on the priority information corresponding to the data to be transmitted in the logical channel, the second priority information can be determined based on the minimum priority information in the priority information corresponding to the data to be transmitted in the logical channel.

[0308] It should be noted that, in the embodiments of the present application, the priority information corresponding to the data to be transmitted can be used to determine the priority of the data to be transmitted. The present application does not specifically limit the form of the priority information. For example, the priority information can be a priority value of the data to be transmitted, or a parameter indicating the priority value of the data to be transmitted.

[0309] It can be understood that in an embodiment of the present application, if the SL CSI-RS and SL data to be transmitted cannot be transmitted simultaneously through the allocated SL grant, then the second priority information of the SL CSI-RS can be equal to the minimum priority information of the data to be transmitted in the logical channel, that is, the second priority information can be determined based on the numerical value of the highest priority of the data to be transmitted in the logical channel.

[0310] It can be understood that in an embodiment of the present application, if there is no allocated transmission resource (allocated SL grant), then the second priority information of the SL CSI-RS can be equal to the minimum priority information of the data to be transmitted in the logical channel, that is, the second priority information can be determined based on the numerical value of the highest priority of the data to be transmitted in the logical channel.

[0311] That is to say, in an embodiment of the present application, the second priority information of the SL CSI-RS can be determined according to the data to be transmitted in the logical channel. Wherein, when the first terminal needs to send the SL CSI-RS or the MAC layer of the first terminal triggers resource selection (or reselection) for the SL CSI-RS transmission, one situation includes that the first terminal has triggered resource selection for the data to be transmitted in the logical channel, and allocated SL grant (i.e., allocated transmission resources), and the above-mentioned SL CSI-RS to be transmitted can be transmitted simultaneously with the data through the SL grant, then the priority information of the SL CSI-RS is equal to the priority information associated with the SL grant. Another situation includes that the first terminal has triggered resource selection for the data to be transmitted in the logical channel, and allocated SL grant (i.e., allocated transmission resources), and the above-mentioned SL CSI-RS to be transmitted cannot be transmitted simultaneously with the data through the SL grant, then the SL CSI-RS priority information is equal to the smallest priority information (i.e., the highest priority) among the data to be transmitted in the logical channel. Another situation includes that the first terminal does not trigger resource selection for the data to be transmitted in the logical channel, that is, there is no allocated SL grant, then the priority information of the SL CSI-RS is equal to the minimum priority information (that is, the highest priority) of the data to be transmitted in the terminal logical channel.

[0312] Furthermore, in an embodiment of the present application, if the second priority information is determined based on a second preset value, that is, for the case where the second priority information of the SL CSI-RS is determined according to the second preset value, the second priority information may be the second preset value.

[0313] For example, in some embodiments, the second preset value may be an integer greater than or equal to 1 and less than or equal to 8.

[0314] That is, in the example of the present application, the second priority information of the SL CSI-RS may be a default integer value, such as a second preset value, wherein the second preset value may be predefined or agreed upon by the standard.

[0315] For example, in some embodiments, the SL CSI-RS is set to the highest priority by default, that is, the second preset value is 1, and accordingly, the second priority information determined based on the second preset value is 1. The reason for this configuration is that the beam management mechanism in the millimeter wave system is the basis for ensuring communication reliability. If a suitable transceiver beam pair is not established between the transceiver terminals, normal data transmission cannot be successfully transmitted. Therefore, it is necessary to ensure the priority transmission of the SL CSI-RS.

[0316] Furthermore, in an embodiment of the present application, for multiple SL CSI-RSs sent in the same time slot, the corresponding second priority information is the same.

[0317] It can be understood that in an embodiment of the present application, if the second terminal receives multiple SL CSI-RSs in a time slot, for example, multiple SL CSI-RSs occupy multiple OFDM symbols in a time slot in a TDM manner, such as CSI-RS#0, CSI-RS#1, CSI-RS#2... in Figure 9, the priorities of the multiple SL CSI-RSs should be the same, that is, multiple SL CSI-RSs correspond to the same second priority information.

[0318] Furthermore, in an embodiment of the present application, the physical layer priority of the sidelink data is carried in the "priority" field in the SCI. Since compatibility with sidelink data communication needs to be considered in the shared resource pool (for example, SL CSI-RS resource selection also needs to consider the selected resources excluding sidelink data), the priority of SL CSI-RS (second priority information) is also carried by the "priority" field in the SCI sidelink control information.

[0319] It should be noted that, in the embodiment of the present application, for the second priority information with a value of 1-8, the overhead is 3 bits, and the indicated priority value is 1 to 8. For example, the second priority information indicated by the "priority" field value of "000" is "1", the second priority information indicated by the "priority" field value of "001" is "2", the second priority information indicated by the "priority" field value of "010" is "3", the second priority information indicated by the "priority" field value of "011" is "4", the second priority information indicated by the "priority" field value of "100" is "5", the second priority information indicated by the "priority" field value of "101" is "6", the second priority information indicated by the "priority" field value of "110" is "7", and the second priority information indicated by the "priority" field value of "111" is "8".

[0320] It can be understood that in the embodiments of the present application, for the priority of SL CSI-RS, the smaller the second priority information, that is, the smaller the priority value indicated by the priority information, the higher the corresponding priority, and the larger the second priority information, that is, the larger the priority value indicated by the priority information, the lower the corresponding priority.

[0321] It should be noted that in the embodiments of the present application, although the "priority" indication field can indicate eight priorities from 1 to 8, in some cases, the SL CSI-RS may only enable some of the values. For example, if the SL CSI-RS has only three priorities 1, 2, and 3, only the three bit indication combinations of "000", "001", and "011" in the "priority" field are used.

[0322] Further, in an embodiment of the present application, when SL CSI-RS and SL data are transmitted in the same time slot, the second priority information indicated by the first information is priority information corresponding to the beam application type or priority information of the SL data.

[0323] It should be noted that, in an embodiment of the present application, when SL CSI-RS and SL data are transmitted in the same time slot, if the priority information corresponding to the beam application type of SL CSI-RS is less than or equal to the priority information of SL data, then the second priority information indicated by the first information is the priority information corresponding to the beam application type of SL CSI-RS; if the priority information corresponding to the beam application type of SL CSI-RS is greater than the priority information of SL data, then the second priority information indicated by the first information is the priority information of SL data.

[0324] It can be understood that in an embodiment of the present application, after the priority information corresponding to the SL CSI-RS is preliminarily determined based on the preset mapping relationship between the application type and the priority information, if the SL CSI-RS and the SL data are transmitted in the same time slot, then the value indicated by the "priority" field in the first-order SCI carried in the PSCCH can be determined based on the priority information corresponding to the beam application type of the SL CSI-RS and the priority information of the SL data. Among them, the size of the priority information corresponding to the beam application type of the SL CSI-RS and the priority information of the SL data can be compared, and then the second priority information can be determined based on the smaller priority information of the two, that is, the second priority information indicated by the "priority" field in the SCI can be the minimum value of the priority information corresponding to the beam application type of the SL CSI-RS and the priority information of the SL data.

[0325] Furthermore, in an embodiment of the present application, for the first terminal, that is, the terminal that sends the SL CSI-RS, one or more information can be used to determine the SL CSI-RS priority information (second priority information) and the method for determining the carrying of the priority information.

[0326] Accordingly, in an embodiment of the present application, for the second terminal, that is, the terminal that receives the measured SL CSI-RS, when performing SL CSI-RS measurement, the second terminal determines the priority information of the measured SL CSI-RS based on the SCI associated with the measured SL CSI-RS. The association relationship between SCI and SL CSI-RS refers to the SCI transmitted in the same time slot as the SL CSI-RS.

[0327] Exemplarily, in some embodiments, for the second terminal, when determining the second priority information of the SL CSI-RS, the second priority information of the SL CSI-RS may be the priority information indicated by the SCI associated with the SL CSI-RS.

[0328] Furthermore, in an embodiment of the present application, if the first priority information is determined based on the second priority information corresponding to the SL CSI-RS, that is, in the case where the first priority information of the first PSFCH is determined based on the second priority information corresponding to the SL CSI-RS, the first priority information may be the second priority information corresponding to the SL CSI-RS. The beam reporting information carried by the first PSFCH includes beam reporting information corresponding to one SL CSI-RS.

[0329] Exemplarily, in some embodiments, as shown in FIG12 , a possible association relationship is that each SL CSI-RS is associated with a first PSFCH.

[0330] That is to say, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on the second priority information of the SL CSI-RS associated with the first PSFCH, if each SL CSI-RS is associated with a first PSFCH, that is, the first PSFCH and the SL CSI-RS are mapped one to one, then the first priority information of the first PSFCH is equal to the second priority information of the above-mentioned associated SL CSI-RS.

[0331] It can be understood that in an embodiment of the present application, after measuring each SL CSI-RS, the second terminal can decide whether to send the first PSFCH on the PSFCH occasion (PSFCH transmission opportunity) to which it is associated based on the first priority information of the first PSFCH, and the first priority information of the first PSFCH is equal to the second priority information of the associated SL CSI-RS. Accordingly, the first terminal can determine the corresponding first priority information based on the second priority information of the SL CSI-RS associated with the first PSFCH, and further decide whether to receive the first PSFCH on the PSFCH occasion to which it is associated.

[0332] It should be noted that, in the embodiments of the present application, for the case where each SL CSI-RS is associated with a first PSFCH, if different SL CSI-RS are associated with the same first PSFCH, then the first PSFCH and the SL CSI-RS can be understood as a one-to-many mapping relationship, that is, although the first PSFCH only carries one beam reporting information corresponding to one SL CSI-R, the first PSFCH and the SL CSI-R can also be a one-to-many mapping relationship. At this time, the first priority information of the first PSFCH still needs to be determined based on the priority information of the SL CSI-RS it carries.

[0333] Furthermore, in an embodiment of the present application, if the first priority information is determined based on the second priority information corresponding to the SL CSI-RS, that is, for the case where the first priority information of the first PSFCH is determined based on the second priority information corresponding to the SL CSI-RS, the first priority information can be determined based on the minimum priority information among the multiple second priority information corresponding to the multiple SL CSI-RS. The beam reporting information carried by the first PSFCH includes multiple beam reporting information corresponding to multiple SL CSI-RSs.

[0334] Exemplarily, in some embodiments, as shown in FIG13 , a possible association relationship is that multiple SL CSI-RSs are associated with one first PSFCH.

[0335] That is to say, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on the second priority information of the SL CSI-RS associated with the first PSFCH, if multiple SL CSI-RSs are associated with one first PSFCH, that is, the first PSFCH and the SL CSI-RS have a one-to-many mapping relationship, then the first priority information of the first PSFCH is equal to the minimum priority information among the multiple second priority information corresponding to the associated multiple SL CSI-RSs.

[0336] It can be understood that in an embodiment of the present application, after measuring multiple SL CSI-RS, the second terminal can decide whether to report the measurement result information related to one or more SL CSI-RS through the first PSFCH on the PSFCH occasion to which it is associated based on the first priority information of the first PSFCH. If the first PSFCH reports the measurement result information of multiple SL CSI-RS, the first priority information of the first PSFCH is equal to the smallest priority information among the multiple second priority information of the associated multiple SL CSI-RS. Accordingly, the first terminal can determine the corresponding first priority information based on the multiple second priority information of the multiple SL CSI-RS associated with the first PSFCH, and further decide whether to receive the first PSFCH on the PSFCH occasion to which it is associated.

[0337] It should be noted that in an embodiment of the present application, when reporting multiple SL CSI-RS related measurement result information through the first PSFCH, since the existing PSFCH format 0 cannot carry multi-bit information, it is necessary to introduce a new format for the first PSFCH so that it can carry multi-bit information.

[0338] It can be understood that in an embodiment of the present application, the first PSFCH can be a PSFCH carrying one or more beam reporting information, and the first priority information of the first PSFCH can be determined by the second priority information of the SL CSI-RS associated with the first PSFCH.

[0339] It should be noted that, in the embodiment of the present application, the first PSFCH is associated with the SL CSI-RS, which can be understood as the first PSFCH resource being associated with at least one information of the time domain, frequency domain, and code domain of the SL CSI-RS.

[0340] It should also be noted that, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on the second priority information of the SL CSI-RS associated with the first PSFCH, for the case where one SL CSI-RS is associated with one first PSFCH, if multiple different SL CSI-RSs are associated with the same first PSFCH, then the first priority information of the first PSFCH still needs to be determined based on the priority information of the SL CSI-RS it carries.

[0341] That is to say, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on the second priority information of the SL CSI-RS associated with the first PSFCH, if each SL CSI-RS is associated with a first PSFCH, that is, the first PSFCH and the SL CSI-RS have a one-to-one mapping relationship, then the priority information of the first PSFCH is equal to the priority information of the associated SL CSI-RS. If multiple SL CSI-RSs are associated with one first PSFCH, that is, the first PSFCH and the SL CSI-RS have a one-to-many mapping relationship, then the priority information of the first PSFCH is equal to the smallest priority information among the multiple second priority information of the associated multiple SL CSI-RSs.

[0342] Furthermore, in an embodiment of the present application, if the first priority information is determined based on a priority reference value, that is, in the case where the first priority information of the first PSFCH is determined according to the priority reference value, the first priority information can be determined according to the priority reference value indicated by the SCI associated with the SL CSI-RS.

[0343] Exemplarily, in some embodiments, the priority reference value is an integer greater than or equal to 1 and less than or equal to 8.

[0344] Furthermore, in an embodiment of the present application, the first priority information is determined based on a priority reference value indicated by the SCI; wherein the first PSFCH is associated with an SCI.

[0345] That is to say, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on a priority reference value indicated by the SCI, if a first PSFCH is associated with an SCI, that is, the first PSFCH and the SCI have a one-to-one mapping relationship, then the first priority information of the first PSFCH is equal to a priority reference value indicated by the above-mentioned associated SCI.

[0346] It should be noted that, in the embodiment of the present application, for the case where each SCI is associated with a first PSFCH, if different SCIs are associated with the same first PSFCH, then the first PSFCH and the SCI can be understood as a one-to-many mapping relationship, that is, although one first PSFCH is associated with one SCI, the first PSFCH and the SCI can also be a one-to-many mapping relationship. At this time, the first priority information of the first PSFCH still needs to be determined according to the priority reference value indicated by the SCI associated with the SL CSI-RS it carries.

[0347] Furthermore, in an embodiment of the present application, the first priority information is determined based on minimum priority information among multiple priority reference values ​​indicated by multiple SCIs; wherein the first PSFCH is associated with multiple SCIs.

[0348] That is to say, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on a priority reference value indicated by the SCI, if a first PSFCH is associated with multiple SCIs, that is, the first PSFCH and the SCI have a one-to-many mapping relationship, then the first priority information of the first PSFCH is determined based on the minimum priority information among the multiple priority reference values ​​indicated by the multiple SCIs.

[0349] For example, in some embodiments, the second priority information of the SL CSI-RS may not be explicitly introduced, but the priority information (priority reference value) may be indicated by the SCI associated with the SL CSI-RS. In this case, the priority information of the first PSFCH can be determined based on the priority reference value indicated by the SCI associated with the first PSFCH.

[0350] For example, in some embodiments, the first PSFCH and the SCI may include two association relationships. If the first PSFCH is associated with one SCI, the priority information of the first PSFCH is equal to the priority reference value indicated by the associated SCI. If the first PSFCH is associated with multiple SCIs, the priority information of the first PSFCH is equal to the minimum priority information among the priority reference values ​​indicated by the multiple associated SCIs.

[0351] It should also be noted that, in an embodiment of the present application, when determining the first priority information of the first PSFCH based on the priority reference value indicated by the SCI associated with the first PSFCH, for the case where one SCI is associated with one first PSFCH, if multiple different SCIs are associated with the same first PSFCH, then the first priority information of the first PSFCH still needs to be determined based on the priority reference value indicated by the SCI associated with the SL CSI-RS it carries.

[0352] It can be understood that in an embodiment of the present application, the priority reference value indicated by the SCI is determined according to the priority information indicated by the "priority" field in the SCI, for example, according to the priority information value indicated by the "priority" field in the SCI.

[0353] Furthermore, in an embodiment of the present application, if the first priority information is determined based on a first preset value, that is, for the case where the first priority information of the first PSFCH is determined according to the first preset value, the first priority information may be the first preset value.

[0354] For example, in some embodiments, the first preset value may be an integer greater than or equal to 1 and less than or equal to 8.

[0355] That is, in the example of the present application, the first priority information of the first PSFCH may be a default integer value, such as a first preset value, wherein the first preset value may be predefined or agreed upon by a standard.

[0356] For example, in some embodiments, the first priority information of the first PSFCH is set to the highest priority by default, that is, the first preset value is 1. Accordingly, the first priority information determined based on the first preset value is 1. An advantage of such a configuration is that the first terminal or the second terminal preferentially processes the first PSFCH among multiple types of PSFCHs, so as to ensure the effectiveness of the beam management mechanism in the FR2 frequency band, thereby ensuring communication reliability.

[0357] That is, in an embodiment of the present application, the first terminal may first determine the first priority information of the first PSFCH, and then may receive the beam reporting information carried by the first PSFCH based on the first priority information. The first priority information may be determined based on one or more of the following information: the second priority information of the SL CSI-RS, a priority reference value, and a first preset value.

[0358] Accordingly, in an embodiment of the present application, the second terminal may first determine the first priority information of the first PSFCH, and then may send the beam reporting information carried by the first PSFCH based on the first priority information. The first priority information may be determined based on one or more of the following information: the second priority information of the SL CSI-RS, a priority reference value, and a first preset value.

[0359] Thus, in the embodiment of the present application, the method for determining the first priority information of the first PSFCH can be applied to the first terminal or the second terminal. This embodiment of the present application does not specifically limit this.

[0360] Furthermore, in an embodiment of the present application, when the second terminal sends beam reporting information carried by the first PSFCH based on the first priority corresponding to the first PSFCH, the second terminal can send beam reporting information carried by the first PSFCH based on the first priority information and the PSFCH status.

[0361] That is to say, in an embodiment of the present application, when sending beam reporting information, the second terminal can choose to send the beam reporting information carried by the first PSFCH based on the first priority information and PSFCH status of the first PSFCH.

[0362] It should be noted that, in the embodiments of the present application, the PSFCH state includes a sending state or a receiving state.

[0363] Furthermore, in an embodiment of the present application, the PSFCH state can be determined based on a preset processing order of the PSFCH and a first PSFCH set; wherein the preset processing order of the PSFCH includes processing the first PSFCH first, or processing the first PSFCH last; the first PSFCH set includes one or more first PSFCHs to be sent, and / or one or more first PSFCHs to be received.

[0364] It should be noted that in an embodiment of the present application, in the SL system, there may be multiple different types of PSFCHs that need to be sent / received simultaneously on a PSFCH occasion in the resource pool, wherein at least one or more of the following types of PSFCHs may exist on a PSFCH occasion: PSFCH carrying HARQ-ACK information, PSFCH carrying resource conflict information, and the first PSFCH.

[0365] It can be understood that in an embodiment of the present application, the preset processing order of PSFCH can indicate the processing order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH.

[0366] Exemplarily, in some embodiments, the preset processing order of PSFCHs may indicate that the first PSFCH is processed first. Specifically, the following are the cases where a PSFCH carrying HARQ-ACK information and a PSFCH carrying resource conflict information coexist, and the first PSFCH is processed first; another case where a PSFCH carrying HARQ-ACK information coexists, and the first PSFCH is processed first; another case where a PSFCH carrying resource conflict information coexists, and the first PSFCH is processed first; the processing order between the two cases; and another case where only the first PSFCH exists, and the first PSFCH is processed.

[0367] Exemplarily, in some embodiments, the preset processing order of PSFCHs may indicate that the first PSFCH is processed last. Specifically, the following situations are discussed: one situation is that a PSFCH carrying HARQ-ACK information, a PSFCH carrying resource conflict information, and the first PSFCH are simultaneously present, and the first PSFCH is processed last; another situation is that a PSFCH carrying HARQ-ACK information and the first PSFCH are simultaneously present, and the first PSFCH is processed last; another situation is that a PSFCH carrying resource conflict information and the first PSFCH are simultaneously present, and the first PSFCH is processed last; another situation is that a PSFCH carrying resource conflict information and the first PSFCH are simultaneously present, and the first PSFCH is processed last; another situation is that only the first PSFCH exists, and the first PSFCH is processed.

[0368] It should be noted that in an embodiment of the present application, the preset processing order of PSFCH can also indicate any processing order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH, and this application does not make specific limitations.

[0369] It should be noted that in the embodiments of the present application, in the SL system, in any PSFCH occasion in the resource pool, there may be both a PSFCH to be sent and a PSFCH to be received. However, due to the half-duplex limitation, only one PSFCH state can be selected in the sending state or the receiving state to perform related PSFCH operations.

[0370] For example, in some embodiments, if there are both a PSFCH carrying HARQ-ACK information and a PSFCH carrying resource conflict information, the PSFCH state can be first determined as a sending state or a receiving state based on the content of the PSFCH carrying information and the PSFCH priority information.

[0371] For example, in some embodiments, if there are both a PSFCH carrying HARQ-ACK information and a PSFCH carrying resource conflict information, when determining the PSFCH state, the PSFCH state can be determined as a sending state or a receiving state based on the state corresponding to the PSFCH with the smallest priority information associated with it in the PSFCH set carrying the HARQ-ACK information.

[0372] Exemplarily, in some embodiments, if there is no PSFCH carrying HARQ-ACK information, but there is a PSFCH carrying conflict information, then the PSFCH state corresponding to the PSFCH with the smallest priority information associated in the PSFCH set carrying conflict information is a sending state or a receiving state.

[0373] It should be noted that, in the embodiment of the present application, the first PSFCH set may include one or more first PSFCHs to be sent, and / or one or more first PSFCHs to be received.

[0374] That is, in an embodiment of the present application, in the SL system, there may be multiple different types of PSFCHs on a PSFCH occasion in a resource pool, and each type of PSFCH may include one or more PSFCHs to be received or to be sent, and the one or more PSFCHs to be received or to be sent may constitute a PSFCH set of this type of PSFCH.

[0375] Accordingly, in an embodiment of the present application, when the second terminal sends the beam reporting information carried by the first PSFCH, it can choose to first determine the PSFCH status according to the preset processing order of the PSFCH and the first PSFCH set, and then send the beam reporting information carried by the first PSFCH according to the first priority information and PSFCH status of the first PSFCH.

[0376] It should be noted that, in an embodiment of the present application, when determining the PSFCH state based on the preset processing order of the PSFCH and the first PSFCH set, if the preset processing order of the PSFCH indicates that the first PSFCH has the highest priority, that is, the preset processing order of the PSFCH indicates that the first PSFCH is processed first, then for one or more first PSFCHs to be sent in the first PSFCH set, and / or one or more first PSFCHs to be received, the first priority information of each first PSFCH can be determined first. If the first PSFCH with the smallest first priority information in the first PSFCH set is the first PSFCH to be sent, then the PSFCH state can be determined to be the sending state. Conversely, if the first PSFCH with the smallest first priority information in the first PSFCH set is the first PSFCH to be received, then the PSFCH state can be determined to be the receiving state.

[0377] That is to say, in an embodiment of the present application, if the preset processing order of PSFCH indicates that the first PSFCH is processed first, then only when the first PSFCH corresponding to the smallest first priority information in the first PSFCH set is the first PSFCH to be sent, can the PSFCH state be determined to be the sending state. At this time, the second terminal can send the first PSFCH on this PSFCH occasion.

[0378] Exemplarily, in some embodiments, if the first PSFCH has the highest priority, and if there is a first PSFCH to be sent or received, the first PSFCH can be processed first. If there is a first PSFCH to be sent and / or to be received, a first priority information set and / or a second priority information set can be determined, wherein the first priority information set is associated with the set of first PSFCHs to be sent, and the second priority information set is associated with the set of first PSFCHs to be received. The sending or receiving of the PSFCH can be determined based on the first PSFCH corresponding to the smallest priority information in the first priority information set and / or the second priority information set. Specifically, if the above-mentioned first PSFCH is a PSFCH to be sent by the terminal, the terminal sends one or more PSFCHs on this PSFCH occasion; if the above-mentioned first PSFCH is a PSFCH to be received by the terminal, the terminal receives one or more PSFCHs on this PSFCH occasion.

[0379] It should be noted that, in an embodiment of the present application, when determining the PSFCH state based on the preset processing order of the PSFCH and the first PSFCH set, if the preset processing order of the PSFCH indicates that the first PSFCH has the lowest priority, that is, the preset processing order of the PSFCH indicates that the first PSFCH is processed last, then the PSFCH state can be determined as a sending state or a receiving state based on the PSFCH priority information corresponding to the PSFCH carrying HARQ-ACK information and / or the PSFCH carrying resource conflict information.

[0380] That is to say, in an embodiment of the present application, if the preset processing order of PSFCH indicates that the first PSFCH is processed last, then the PSFCH status will no longer be determined based on the first priority information of the first PSFCH, and the first PSFCH will be processed after the PSFCH carrying HARQ-ACK information and / or the PSFCH carrying resource conflict information is processed.

[0381] It should be noted that in an embodiment of the present application, if only the first PSFCH exists, that is, only the first PSFCH is processed, then for one or more first PSFCHs to be sent in the first PSFCH set, and / or one or more first PSFCHs to be received, the first priority information of each first PSFCH can be determined first. If the first PSFCH with the smallest first priority information in the first PSFCH set is the first PSFCH to be sent, then the PSFCH state can be determined to be the sending state. Conversely, if the first PSFCH with the smallest first priority information in the first PSFCH set is the first PSFCH to be received, then the PSFCH state can be determined to be the receiving state.

[0382] That is to say, in an embodiment of the present application, if there is only the first PSFCH, then only when the first PSFCH corresponding to the smallest first priority information in the first PSFCH set is the first PSFCH to be sent, can the PSFCH state be determined to be the sending state. At this time, the second terminal can send the first PSFCH on this PSFCH occasion.

[0383] Exemplarily, in some embodiments, if the first PSFCH has the lowest priority, the PSFCH state is determined based on the first priority information of the first PSFCH only when no other type of PSFCH exists. If a first PSFCH is to be sent or received, the first PSFCH may be prioritized for processing. If a first PSFCH is to be sent and / or received, a first priority information set and / or a second priority information set may be determined, wherein the first priority information set is associated with the set of first PSFCHs to be sent, and the second priority information set is associated with the set of first PSFCHs to be received. Whether to send or receive the PSFCH may be determined based on the first PSFCH corresponding to the lowest priority information in the first priority information set and / or the second priority information set. Specifically, if the first PSFCH is a PSFCH to be sent by the terminal, the terminal sends one or more PSFCHs on this PSFCH occasion; if the first PSFCH is a PSFCH to be received by the terminal, the terminal receives one or more PSFCHs on this PSFCH occasion.

[0384] Exemplarily, in some embodiments, if the priority of the first PSFCH is second only to the PSFCH carrying HARQ-ACK information, and if there is no PSFCH carrying HARQ-ACK to be sent or received, the PSFCH state is determined based on the first priority information of the first PSFCH. If there is a first PSFCH to be sent or received, the first PSFCH can be processed with priority. If there is a first PSFCH to be sent and / or received, a first priority information set and / or a second priority information set can be determined, wherein the first priority information set is associated with the set of first PSFCHs to be sent, and the second priority information set is associated with the set of first PSFCHs to be received. Whether to send or receive the PSFCH can be determined based on the first PSFCH corresponding to the smallest priority information in the first priority information set and / or the second priority information set. Specifically, if the first PSFCH is a PSFCH to be sent by the terminal, the terminal sends one or more PSFCHs on this PSFCH occasion; if the first PSFCH is a PSFCH to be received by the terminal, the terminal receives one or more PSFCHs on this PSFCH occasion.

[0385] That is to say, in an embodiment of the present application, whether it is the first terminal or the second terminal, when receiving or sending PSFCH on the PSFCH occasion, the PSFCH state can be first determined according to the priority data of the PSFCH. If the PSFCH state is the sending state, the PSFCH can be sent on the PSFCH occasion. If the PSFCH state is the receiving state, the PSFCH can be received on the PSFCH occasion.

[0386] Furthermore, in an embodiment of the present application, when the second terminal sends the beam reporting information carried by the first PSFCH based on the first priority corresponding to the first PSFCH, the second terminal may send the beam reporting information carried by the first PSFCH based on one or more of the first priority information, the preset sending order of the PSFCH, and the PSFCH sending quantity threshold.

[0387] That is to say, in an embodiment of the present application, when the second terminal sends beam reporting information, it can refer to one or more of the following information: the first priority information of the first PSFCH, the preset sending order of the PSFCH, and the PSFCH sending quantity threshold.

[0388] It should be noted that, in the embodiment of the present application, the PSFCH transmission number threshold represents the upper limit number M of PSFCH transmission opportunities corresponding to the SL CSI-RS that can simultaneously transmit PSFCHs, where M is an integer greater than 0.

[0389] It can be understood that in the embodiment of the present application, the PSFCH transmission quantity threshold M and the PSFCH reception quantity threshold N can be the same or different, and the embodiment of the present application does not specifically limit this.

[0390] It should be noted that, in an embodiment of the present application, the preset sending order of PSFCH may indicate the sending order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH.

[0391] Exemplarily, in some embodiments, the preset sending order of PSFCH may indicate that the first PSFCH is sent first, which specifically includes: one situation is that there are PSFCH carrying HARQ-ACK information, PSFCH carrying resource conflict information, and the first PSFCH at the same time, and the first PSFCH is sent first; another situation is that there are PSFCH carrying HARQ-ACK information and the first PSFCH at the same time, and the first PSFCH is sent first; another situation is that there are PSFCH carrying resource conflict information and the first PSFCH at the same time, and the first PSFCH is sent first; the processing order between them; and another situation is that only the first PSFCH exists, and the first PSFCH is sent.

[0392] Exemplarily, in some embodiments, the preset sending order of PSFCH may indicate that the first PSFCH is sent last, which specifically includes: one situation is that there are PSFCH carrying HARQ-ACK information, PSFCH carrying resource conflict information, and the first PSFCH at the same time, and the first PSFCH is sent last; another situation is that there are PSFCH carrying HARQ-ACK information, the first PSFCH, and the first PSFCH is sent last; another situation is that there are PSFCH carrying resource conflict information, the first PSFCH, and the first PSFCH is sent last; the processing order in between; and another situation is that only the first PSFCH exists, and the first PSFCH is sent.

[0393] It should be noted that in an embodiment of the present application, the preset sending order of PSFCH can also indicate any sending order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH, and this application does not make specific limitations.

[0394] Furthermore, in an embodiment of the present application, after determining the PSFCH state, if the PSFCH state is a sending state, then the PSFCH can be selected to be sent in a PSFCH transmission opportunity (PSFCH occasion) corresponding to the SL CSI-RS. Specifically, the second terminal can send the first PSFCH carrying beam reporting information according to one or more of the first priority information, the preset sending order of the PSFCH, and the PSFCH sending quantity threshold.

[0395] It can be understood that in the embodiment of the present application, since the maximum number of multiple PSFCHs sent simultaneously by the second terminal is limited, if a certain number limit is exceeded, the second terminal cannot complete the sending processing of all PSFCHs to be sent and can only choose to send part of the PSFCHs.

[0396] Exemplarily, in some embodiments, the number of PSFCHs to be sent by the second terminal is N sch，Tx，PSFCH The maximum number of PSFCHs supported by the second terminal to be sent simultaneously (PSFCH sending number threshold M) is N max，PSFCH , the number of PSFCHs finally transmitted by the second terminal is N Tx，PSFCH , if N sch，Tx，PSFCH >N max，PSFCH , then N Tx，PSFCH =N max，PSFCH ; If N sch，Tx，PSFCH ≤N Max，PSFCH , then N Tx，PSFCH =N sch，Tx，PSFCH .

[0397] It can be understood that in the embodiment of the present application, since the maximum power of the second terminal to simultaneously send multiple PSFCHs is limited, if a certain power limit is exceeded, the second terminal cannot complete the sending processing of all PSFCHs to be sent and can only choose to send part of the PSFCHs.

[0398] It can be understood that in an embodiment of the present application, since one PSFCH occasion may contain one or more types of PSFCHs including a PSFCH carrying HARQ-ACK information, and / or a PSFCH carrying resource conflict information, and / or a first PSFCH, it is also necessary to further restrict the PSFCH sent by the second terminal according to the preset sending order of the PSFCH.

[0399] That is, in the embodiment of the present application, considering that there may be multiple types of PSFCHs to be sent, and the maximum capability of sending multiple PSFCHs simultaneously (including quantity limitation and power limitation), the N that can be sent in the end is Tx，PSFCHIn a PSFCH, the second terminal can send the first PSFCH based on one or more of the first priority information, the preset sending order of the PSFCH and the PSFCH sending quantity threshold. At the same time, in the process of sending the PSFCH, it may also be restricted by the preset power threshold.

[0400] Furthermore, in an embodiment of the present application, the second terminal may send the beam reporting information based on the K first PSFCHs to be sent with the smallest priority information; wherein K is an integer greater than 0 and less than or equal to M.

[0401] It can be understood that in the embodiments of the present application, in addition to the limitation of the PSFCH transmission number threshold, the PSFCH transmission number may also be affected by the power control mechanism, that is, under the limitation of the PSFCH transmission number threshold M and the preset power threshold, the number of PSFCHs that the second terminal can ultimately send simultaneously may be less than the PSFCH transmission number threshold M.

[0402] Furthermore, in an embodiment of the present application, when the preset sending order of PSFCH indicates that the first PSFCH is sent first, and the number of first PSFCHs to be sent is greater than M, the second terminal sends beam reporting information based on the K first PSFCHs to be sent with the smallest priority information.

[0403] It should be noted that, in an embodiment of the present application, if the preset transmission order of the PSFCH indicates that the first PSFCH is to be sent first, then the second terminal may give priority to sending the first PSFCH. Specifically, if the number of first PSFCHs to be sent exceeds the PSFCH transmission number threshold, that is, the number of first PSFCHs to be sent is greater than M, then the second terminal may give priority to sending the K first PSFCHs with the smallest first priority information, thereby sending beam reporting information through the K first PSFCHs to be sent. Among them, taking into account the influence of the power control mechanism, the number K of first PSFCHs finally sent may be less than or equal to the PSFCH transmission number threshold M.

[0404] Exemplarily, in some embodiments, FIG18 is a schematic diagram of an implementation of sending the first PSFCH provided by an embodiment of the present application. As shown in FIG18 , the total number of three types of PSFCHs to be sent by the second terminal is 8, and the maximum number of PSFCHs supported by the second terminal for sending simultaneously is 4, that is, the number of PSFCHs that the second terminal can send simultaneously should be 4. At this time, if the preset sending order of the PSFCH indicates that the first PSFCH is sent first, then only after all the first PSFCHs are sent will other types of PSFCHs be considered for sending. Since the number of first PSFCHs to be sent is 5, it is impossible to send all the first PSFCHs. At this time, the first PSFCHs to be sent are selected in ascending order of priority information (priority value). At the same time, due to the limitation of the preset power threshold, the first PSFCHs that can be sent in the end are the three first PSFCHs whose first priority information (first priority value) is 1, 3, and 4.

[0405] Furthermore, in an embodiment of the present application, when the preset sending order of PSFCH indicates that the first PSFCH is sent first, and the number of first PSFCHs to be sent is less than or equal to M, without considering the limitation of the preset power threshold, the second terminal can send beam reporting information based on all the first PSFCHs to be sent.

[0406] It should be noted that, in an embodiment of the present application, if the preset transmission order of the PSFCH indicates that the first PSFCH is to be transmitted first, then the second terminal may give priority to transmitting the first PSFCH. Specifically, if the number of first PSFCHs to be transmitted is less than or equal to the PSFCH transmission number threshold, that is, the number of first PSFCHs to be transmitted is less than or equal to M, then without considering the limitation of the preset power threshold, the second terminal may directly transmit all first PSFCHs to be transmitted, thereby transmitting beam reporting information through the first PSFCH to be transmitted.

[0407] Exemplarily, in some embodiments, FIG19 is a second schematic diagram of an implementation of sending the first PSFCH provided by an embodiment of the present application. As shown in FIG19 , the total number of three types of PSFCHs to be sent by the second terminal is 8, and the maximum number of PSFCHs supported by the second terminal to be sent simultaneously is 4, that is, the number of PSFCHs that the second terminal can send simultaneously should be 4. At this time, if the preset transmission order of the PSFCH indicates that the first PSFCH is sent first, then only after all the first PSFCHs are sent will other types of PSFCHs be considered for transmission. Since the number of first PSFCHs to be sent is 4, all the first PSFCHs can only be sent simultaneously. At this time, without considering the limitation of the preset power threshold, the second terminal chooses to send all 4 first PSFCHs.

[0408] Furthermore, in an embodiment of the present application, when the preset sending order of PSFCH indicates that the PSFCH carrying HARQ-ACK information and the PSFCH carrying resource conflict information are sent first, and the number Q of PSFCHs to be sent is less than or equal to M, without considering the limitation of the preset power threshold, the second terminal sends beam reporting information based on the MQ first PSFCHs to be sent with the smallest priority information; wherein Q is an integer greater than 0.

[0409] It should be noted that, in an embodiment of the present application, if the preset transmission order of the PSFCH indicates that the first PSFCH is sent last, then the second terminal may give priority to sending other types of PSFCHs to be sent other than the first PSFCH. Specifically, if the number Q of other types of PSFCHs to be sent other than the first PSFCH is less than or equal to M, then the second terminal may also choose to send MQ first PSFCHs to be sent with the smallest first priority information while sending Q other types of PSFCHs to be sent, thereby sending beam reporting information through MQ first PSFCHs to be sent.

[0410] Exemplarily, in some embodiments, FIG20 is a third implementation diagram of sending the first PSFCH provided by an embodiment of the present application. As shown in FIG20 , the total number of three types of PSFCHs to be sent by the second terminal is 8, and the maximum number of PSFCHs supported by the second terminal to be sent simultaneously is 4, that is, the number of PSFCHs that the second terminal can send simultaneously should be 4. At this time, if the preset transmission order of the PSFCH indicates that the first PSFCH is sent last, then priority will be given to sending other types of PSFCHs to be sent except the first PSFCH. If the first PSFCH is still allowed to be sent, then the first PSFCH can be selected in ascending order of priority information. For example, the first PSFCH with the first priority information (first priority value) of 1 is selected to be sent last.

[0411] That is to say, in an embodiment of the present application, when the second terminal sends PSFCH, it needs to limit the maximum number of multiple PSFCHs sent simultaneously based on the PSFCH sending quantity threshold and / or the preset power threshold, and it also needs to limit the order of sending different types of PSFCHs based on the preset sending order of PSFCH.

[0412] Accordingly, in an embodiment of the present application, when the first terminal receives a PSFCH, on the one hand, the PSFCH reception number threshold will limit the maximum number of multiple PSFCHs that can be received simultaneously, and on the other hand, the preset PSFCH reception order will limit the order in which different types of PSFCHs are received. The first terminal can refer to the principles and methods for transmitting the PSFCH by the second terminal described above to receive the PSFCH.

[0413] In summary, the side link communication method proposed in the embodiment of the present application completes the transmission of the reporting beam reporting information by introducing the priority of the PSFCH associated with the SL CSI-RS, wherein the priority information of the PSFCH can refer to the priority information of the SL CSI-RS, or can refer to the priority information indicated by the SCI, or can refer to the pre-set priority information. Accordingly, on the basis of introducing the priority of the PSFCH associated with the SL CSI-RS, the PSFCH sending / receiving process is further optimized accordingly, and the relevant mechanism of the terminal sending and receiving PSFCH is improved, thereby ensuring the effectiveness of the beam management mechanism.

[0414] The embodiment of the present application proposes a side link communication scheme, in which the second terminal sends beam reporting information to the first terminal; wherein the beam reporting information includes the beam reporting information corresponding to the SL CSI-RS, and the second terminal sends the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH. Correspondingly, the first terminal receives the beam reporting information carried by the first PSFCH sent by the second terminal based on the first priority information corresponding to the first PSFCH. That is to say, in the embodiment of the present application, for the PSFCH carrying the beam reporting information corresponding to the SL CSI-RS, the priority information corresponding to the PSFCH can be introduced, so that the priority information of the PSFCH can be used to receive or send the beam reporting information. It can be seen that the embodiment of the present application further optimizes the PSFCH sending / receiving mechanism by determining the priority information of the PSFCH associated with the SL CSI-RS, improves the relevant mechanism of the terminal sending and receiving PSFCH, thereby ensuring the effectiveness of the beam management mechanism, and thus improving the communication reliability.

[0415] Based on the above embodiment, another embodiment of the present application proposes a sidelink communication method, which can be applied to a first terminal and / or a second terminal. The first terminal and the second terminal can be sidelink terminals.

[0416] It should be noted that in the embodiments of the present application, the first terminal and the second terminal may be different terminals in a sidewalk system, which is not specifically limited in the present application. For example, the first terminal and the second terminal may be different sidewalk terminals in a sidewalk millimeter wave transmission system.

[0417] Below, the sidelink communication method proposed in the embodiment of the present application is exemplified by taking the case where the priority information is a priority value as an example. For example, the first priority information is the first priority value corresponding to the first PSFCH, and the second priority information is the second priority value of the SL CSI-RS.

[0418] Furthermore, in an embodiment of the present application, FIG21 is a third schematic diagram of a flow chart for implementing a sidelink communication method provided in an embodiment of the present application. As shown in FIG21 , the sidelink communication method may include the following steps:

[0419] Step 301: A first terminal sends first information to a second terminal; wherein the first information is used to indicate a second priority value of an SL CSI-RS.

[0420] In an embodiment of the present application, the first terminal may send first information to the second terminal, wherein the first information may be used to indicate a priority value of the SL CSI-RS, that is, to indicate a second priority value.

[0421] Exemplarily, in some embodiments, the first terminal may first determine the SL CSI-RS priority, that is, determine the second priority value.

[0422] It can be understood that in an embodiment of the present application, the transmission of SL CSI-RS can be located in a shared resource pool, and the shared resource pool indicates that the resource pool can be used for sidelink data transmission, that is, the PSSCH in the resource pool can be used to carry the SL MAC SDU. The transmission of SL CSI-RS can also be located in a dedicated resource pool (dedicated resource pool), that is, by configuration or pre-configuration, a dedicated resource pool is separately configured in the SL BWP for sending / receiving SL CSI-RS, and there will be no sidelink data transmission in the dedicated resource pool.

[0423] For example, in some embodiments, it is necessary to introduce a priority value for the SL CSI-RS in SL FR2, which may include the following methods:

[0424] Method 1: Determine the priority value of the SL CSI-RS according to the purpose of sending the SL CSI-RS, that is, determine the second priority value according to a preset mapping relationship between the application type and the priority information.

[0425] In millimeter-wave systems, beam management mechanisms include initial beam pairing, beam maintenance, and beam failure recovery. Initial beam pairing refers to the initial establishment of the transmit and receive beam correspondence between two terminals. Beam maintenance involves more refined beam selection and switching between the two terminals after the initial beam pairing is established. Beam failure recovery involves reestablishing a beam connection between the two terminals when communication quality deteriorates to a certain level.

[0426] Specifically, the relationship between the purpose of sending the SL CSI-RS and the priority value of the SL CSI-RS is a one-to-one or one-to-many mapping relationship, and the priority values ​​mapped to different purposes can be the same, different, or partially the same.

[0427] The purpose of transmitting the SL CSI-RS, i.e., the beam application type, can include one or more of the following types: initial beam pairing, beam maintenance, and beam failure recovery. Beam maintenance can include transmit beam selection and receive beam selection, and beam failure recovery can include beam failure detection and new candidate beam selection.

[0428] Transmit beam selection allows for finer division for beam maintenance purposes. After two terminals establish an initial beam pair, a coarse-grained beam pair is established between the terminals. The transmitting terminal can use a finer-grained beam to send SL CSI-RS. The receiving terminal (e.g., the second terminal) uses the same receive beam to perform measurements and then feeds back the preferred measurement results to the transmitting terminal. The transmitting terminal then determines the preferred transmit beam based on this feedback.

[0429] Receive beam selection allows for finer-grained beam maintenance. Unlike transmit beam selection, receive beam selection involves the transmitting terminal sending SL CSI-RS signals multiple times using the same transmit beam, while the receiving terminal receives them using different receive beams. The optimal receive beam is selected based on the measurement results.

[0430] Beam failure detection can be further refined for beam failure recovery. During beam failure recovery, the receiving terminal must first detect beam failure before initiating the recovery process. During beam failure detection, the transmitting terminal periodically transmits SL CSI-RS signals, and the receiving terminal performs reception measurements. When the measurement results meet certain conditions, the transmitting beam is deemed to have failed.

[0431] New candidate beam selection allows for finer division for beam failure recovery purposes. When a transmit beam is determined to be failed, the transmitting terminal can use a different transmit beam to send the SL CSI-RS. The receiving terminal performs measurements and then feeds back the new candidate beam information to the transmitting terminal.

[0432] The priority value of SL CSI-RS is one or more of 1-8. This is because the priority value of SL data service includes eight priorities from 1 to 8. In order to ensure the compatibility and comparability of sidelink data transmission and SL CSI-RS transmission in the same resource pool, the priority value of SL CSI-RS should also be within this range.

[0433] For example, in some embodiments, the purpose of sending the SL CSI-RS and the SL CSI-RS priority value are in a one-to-one mapping relationship, as shown in Table 5 below:

[0434] Table 5

[0435] For example, in some embodiments, the purpose of sending the SL CSI-RS and the SL CSI-RS priority value are in a one-to-many mapping relationship, as shown in Table 6 below:

[0436] Table 6

[0437] It can be understood that, in the embodiment of the present application, when the above mapping relationship is a one-to-many mapping relationship, the terminal selects from multiple priorities in a uniform random manner, or depends on the terminal implementation.

[0438] Method 2: determining the priority value of the SL CSI-RS according to the data to be transmitted in the logical channel, that is, determining the second priority value according to the priority value associated with the allocated transmission resources or the priority value of the data to be transmitted.

[0439] When the terminal needs to send SL CSI-RS or the terminal MAC layer triggers resource selection (or reselection) for SL CSI-RS transmission, if the terminal has triggered resource selection for the data to be transmitted in the logical channel and allocated SL grant (i.e., transmits the allocated transmission resources), if the above-mentioned SL CSI-RS to be transmitted can be transmitted simultaneously with the data through the SL grant, then the priority value of the SL CSI-RS is equal to the priority value associated with the SL grant. Otherwise, the priority value of the SL CSI-RS is equal to the smallest priority value (i.e., the highest priority) among the data to be transmitted in the logical channel.

[0440] If the terminal does not trigger resource selection for the data to be transmitted in the logical channel, that is, there is no allocated SL grant, then the priority value of the SL CSI-RS is equal to the minimum priority value (that is, the highest priority) of the data to be transmitted in the terminal logical channel.

[0441] Method 3: The priority value of the SL CSI-RS is a default integer value, that is, the second priority value is determined according to the second preset value.

[0442] The second preset value is predefined or agreed upon by the standard. For example, the SL CSI-RS is set to the highest priority by default, that is, the priority value is 1. The reason for this configuration is that the beam management mechanism in the millimeter wave system is the basis for ensuring communication reliability. If a suitable transmit and receive beam pair is not established between the transmitting and receiving terminals, normal data transmission cannot be successfully transmitted. Therefore, it is necessary to ensure the priority transmission of the SL CSI-RS.

[0443] Furthermore, when the terminal sends multiple SL CSI-RSs in a time slot, for example, multiple SL CSI-RSs occupy multiple OFDM symbols in a time slot in a TDM manner, such as CSI-RS#0, CSI-RS#1, CSI-RS#2... in Figure 9, the priorities of the multiple SL CSI-RSs should be the same.

[0444] Furthermore, in the existing SL mechanism, the physical layer priority of the sidelink data is carried in the "priority" field in the SCI. Since the compatibility with the sidelink data communication needs to be considered in the shared resource pool (for example, the SL CSI-RS resource selection also needs to consider the selected resources excluding the sidelink data), the priority of the SL CSI-RS is also carried by the "priority" field in the SCI sidelink control information. The overhead is 3 bits, and the priority value indicated is 1 to 8. That is, the priority value indicated by the field value of "000" is "1", and so on. The smaller the value, the higher the priority. It should be noted that although the indication field can indicate a total of 8 priorities from 1 to 8, in some cases, the SL CSI-RS can only enable some of the values. For example, if the SL CSI-RS has only 3 priorities 1, 2, and 3, only the three bit indication combinations of "000", "001", and "011" in the "priority" field are used.

[0445] Furthermore, when SL CSI-RS and SL data are transmitted in the same time slot, the value of the "priority" field in the first-order SCI carried in the PSCCH physical sidelink control channel (used to transmit control information) is determined according to the smaller priority value of the two.

[0446] Further, for the second terminal, that is, from the perspective of receiving and measuring the SL CSI-RS, when the receiving terminal performs SL CSI-RS measurement, the receiving terminal determines the priority value of the measured SL CSI-RS based on the SCI associated with the measured SL CSI-RS. Specifically, the above-mentioned association relationship between SCI and SL CSI-RS refers to the SCI transmitted in the same time slot as the SL CSI-RS, and the above-mentioned priority value determination method is that the SL CSI-RS priority value is equal to the priority value indicated by the associated SCI.

[0447] Step 302: The second terminal sends beam reporting information carried by the first PSFCH to the first terminal based on the first priority value corresponding to the first PSFCH.

[0448] In an embodiment of the present application, after the first terminal sends the SL CSI-RS to the second terminal, the second terminal can send beam reporting information corresponding to the SL CSI-RS to the first terminal based on the first priority value; wherein the first priority value is the priority value corresponding to the first PSFCH carrying the beam reporting information.

[0449] It should be noted that, in an embodiment of the present application, the beam reporting information may include beam reporting information corresponding to the SL CSI-RS. The first terminal sends the SL CSI-RS to the second terminal, and the second terminal may use any reporting method when reporting after the measurement is completed. For example, the beam reporting information may be reported directly; a threshold value may be preset, and when the measurement result is greater than the threshold value, 1 bit of indication information may be reported; or 1 bit of indication information may be reported each time the measurement result is greater than all previous measurement results.

[0450] It can be understood that in an embodiment of the present application, after the first terminal sends the SL CSI-RS to the second terminal, the second terminal needs to perform measurements on the corresponding SL CSI-RS resources and report the obtained measurement results to the transmitting terminal. The above-mentioned reporting information (beam reporting information) can be carried on the PSFCH. According to a certain association relationship, the uniquely associated PSFCH can be determined through the SL CSI-RS. The association relationship here can be that the PSFCH resource is associated with at least one information of the time domain, frequency domain, and code domain of the SL CSI-RS. For the convenience of subsequent description, the above-mentioned PSFCH used to carry the reporting information is referred to as the first PSFCH. (Example: each SL CSI-RS is associated with a unique PSFCH occasion through the time domain information of the transmission resource. Since PSFCH format 0 can only carry 1 bit of information, when the measurement result is greater than or equal to a certain threshold, "1" is reported on the PSFCH occasion, otherwise, "0" is reported.)

[0451] For example, in some embodiments, in the SL system, there already exist PSFCHs carrying HARQ-ACK information and PSFCHs carrying resource conflict information. After the first PSFCH is introduced, multiple types and multiple PSFCHs may need to be sent / received simultaneously on a PSFCH occasion in the resource pool. In order to coordinate the transmission or reception of the above multiple PSFCHs, it is first necessary to determine the priority value of the first PSFCH. Specifically, the following methods may be used:

[0452] Method 1: The first PSFCH priority value is determined according to the priority value of the SL CSI-RS associated therewith, that is, the first priority value can be determined according to the second priority value of the SL CSI-RS.

[0453] The first PSFCH is used to carry relevant information of the SL CSI-RS measurement results. Therefore, for the transmission or reception of the first PSFCH, the SL CSI-RS associated with it can always be found, and the priority value of the first PSFCH can be determined according to the priority value of the SL CSI-RS.

[0454] It should be noted that in an embodiment of the present application, if each SL CSI-RS is associated with a first PSFCH (one-to-one mapping), the receiving terminal decides whether to send the first PSFCH on the PSFCH occasion to which it is associated after measuring each SL CSI-RS. The priority value of the first PSFCH is equal to the priority value of the above-mentioned associated SL CSI-RS.

[0455] It should be noted that, in an embodiment of the present application, multiple SL CSI-RSs are associated with one PSFCH occasion. After the receiving terminal measures the multiple SL CSI-RSs, the measurement result information related to one or more of the SL CSI-RSs is reported through the first PSFCH on the PSFCH occasion. In this case, since the existing PSFCH format 0 cannot carry multi-bit information, it may be necessary to introduce a new format for the first PSFCH so that it can carry multi-bit information.

[0456] At this time, if the first PSFCH only reports the measurement result information of one SL CSI-RS, the priority value of the first PSFCH is equal to the priority value of the SL CSI-RS; if the first PSFCH reports the measurement result information of multiple SL CSI-RS, the priority value of the first PSFCH is equal to the lowest priority value among the multiple SL CSI-RS priority values.

[0457] Method 2: The priority value of the first PSFCH is determined according to the priority value indicated by the SCI associated therewith, that is, the first priority value can be determined according to the priority reference value indicated by the associated SCI.

[0458] It can be understood that in some cases, the priority value of the SL CSI-RS may not be introduced explicitly, but the priority value may be indicated by the SCI associated with the SL CSI-RS. In this case, the priority value of the first PSFCH can be determined based on the priority value (priority reference value) indicated by the SCI associated with the first PSFCH.

[0459] Exemplarily, in some embodiments, if the first PSFCH is associated with an SCI, the priority value of the first PSFCH is equal to the priority value indicated by the associated SCI, wherein the priority value indicated by the SCI is determined according to the priority value indicated by the "priority" field in the SCI; if the first PSFCH is associated with multiple SCIs, the priority value of the first PSFCH is equal to the lowest priority value among the priority values ​​indicated by the multiple associated SCIs.

[0460] Method 3: The priority value of the first PSFCH is a default integer value, that is, the first priority value can be determined according to the first preset value.

[0461] It is understood that in the embodiments of the present application, the priority value of the first PSFCH is an integer value predefined by the standard, such as a first preset value. For example, the priority value of the first PSFCH can be defaulted to the highest priority value, that is, the value is "0". The advantage of this approach is that the terminal prioritizes the first PSFCH among multiple types of PSFCHs, so as to ensure the effectiveness of the beam management mechanism in the FR2 frequency band, thereby ensuring communication reliability.

[0462] It should be noted that for the second terminal sending the first PSFCH, it is necessary to determine the priority value of sending the first PSFCH. Correspondingly, for the first terminal receiving the first PSFCH, that is, the terminal sending SL CSI-RS, it is also necessary to determine the relevant priority value when receiving the first PSFCH.

[0463] That is to say, in an embodiment of the present application, the method for determining the priority value of the first PSFCH can be applied to determining the priority value of sending the first PSFCH, and can also be applied to determining the priority value of receiving the first PSFCH. Therefore, for the communication method of the side link of the first PSFCH, there is no need to make a special distinction between sending or receiving the first PSFCH.

[0464] It can be understood that in an embodiment of the present application, the priority value of the first PSFCH, that is, the first priority value can be determined based on one or more of the following information: the second priority value of the SL CSI-RS, the priority reference value, and the first preset value.

[0465] Furthermore, the terminal may have both a PSFCH to be sent and a PSFCH to be received in any PSFCH occasion in the resource pool. However, due to half-duplex limitations, the terminal can only select one state to perform related PSFCH operations in the sending or receiving state.

[0466] Exemplarily, in some embodiments, when the first PSFCH is not introduced, the terminal may determine the sending or receiving state based on the content of the PSFCH carried information and the PSFCH priority value. Specifically, the terminal preferentially determines the state of sending or receiving the PSFCH based on the state corresponding to the PSFCH with the smallest priority value associated with the PSFCH set carrying HARQ-ACK information. If there is no PSFCH carrying HARQ-ACK information but there is a PSFCH carrying conflicting information, the terminal determines the state of PSFCH sending or receiving based on the state corresponding to the PSFCH with the smallest priority value associated with the PSFCH set carrying conflicting information.

[0467] It is understood that in the embodiment of the present application, after the above-mentioned first PSFCH is introduced, there may be PSFCHs carrying three different types of information on one PSFCH occasion. Therefore, the method for the terminal to determine the state of sending or receiving the PSFCH should be related to the above-mentioned first PSFCH, and specifically may include the following methods:

[0468] Method 1: If there is a first PSFCH to be sent or received, the terminal determines the PSFCH sending or receiving state according to the first PSFCH, wherein the preset processing order of the PSFCH indicates that the first PSFCH is processed first.

[0469] It can be understood that in an embodiment of the present application, the preset processing order of PSFCH indicates that the first PSFCH is processed first, that is, the preset processing order based on PSFCH determines that the first PSFCH has the highest priority among the three types of PSFCH. If there is a transmission or reception of the first PSFCH, the terminal gives priority to processing the first PSFCH.

[0470] Exemplarily, in some embodiments, if the terminal has a first PSFCH to be sent and / or to be received, the terminal can determine a first priority value set and / or a second priority value set, wherein the first priority value set is associated with the set of first PSFCHs to be sent, and the second priority value set is associated with the set of first PSFCHs to be received. The terminal determines whether to send PSFCH or receive PSFCH based on the first PSFCH corresponding to the smallest priority value in the first priority value set and / or the second priority value set. If the above-mentioned first PSFCH is the PSFCH to be sent by the terminal, the terminal sends one or more PSFCHs on this PSFCH occasion; if the above-mentioned first PSFCH is the PSFCH to be received by the terminal, the terminal receives one or more PSFCHs on this PSFCH occasion.

[0471] Method 2: If there is only the first PSFCH to be sent or received, the terminal determines the PSFCH sending or receiving state according to the first PSFCH, wherein the preset processing order of the PSFCH indicates that the first PSFCH is processed last.

[0472] It can be understood that in an embodiment of the present application, the preset processing order of PSFCH indicates that the first PSFCH is processed last, that is, the preset processing order of PSFCH determines that the first PSFCH has the lowest priority among the three types of PSFCHs. When there are no other types of PSFCHs, the terminal will consider the first PSFCH.

[0473] Exemplarily, in some embodiments, if the terminal has only a first PSFCH to be sent and / or to be received, the terminal can determine a first priority value set and / or a second priority value set, wherein the first priority value set is associated with the set of first PSFCHs to be sent, and the second priority value set is associated with the set of first PSFCHs to be received. The terminal determines whether to send PSFCH or receive PSFCH based on the first PSFCH corresponding to the smallest priority value in the first priority value set and / or the second priority value set. If the above-mentioned first PSFCH is the PSFCH to be sent by the terminal, the terminal sends one or more PSFCHs on this PSFCH occasion; if the above-mentioned first PSFCH is the PSFCH to be received by the terminal, the terminal receives one or more PSFCHs on this PSFCH occasion.

[0474] Method 3: When there is no PSFCH carrying HARQ-ACK information and there is a first PSFCH to be sent or received, the terminal determines the sending or receiving PSFCH status based on the first PSFCH, wherein the preset processing order of the PSFCH indicates that the processing order of the PSFCH carrying HARQ-ACK information takes precedence over the first PSFCH.

[0475] It can be understood that in an embodiment of the present application, the priority of the first PSFCH in SL FR2 is determined to be second only to the PSFCH carrying HARQ-ACK information based on the preset processing order of PSFCH, or, for the case where SL FR2 does not support PSFCH carrying conflicting resources, the terminal will only consider the first PSFCH if there is no PSFCH carrying HARQ-ACK information.

[0476] Exemplarily, in some embodiments, when there is no PSFCH carrying HARQ-ACK to be sent, the terminal may determine a first priority value set and / or a second priority value set, wherein the first priority value set is associated with a set of first PSFCHs to be sent, and the second priority value set is associated with a set of first PSFCHs to be received. The terminal determines whether to send PSFCH or receive PSFCH based on the first PSFCH corresponding to the smallest priority value in the first priority value set and / or the second priority value set. If the above-mentioned first PSFCH is the PSFCH to be sent by the terminal, the terminal sends one or more PSFCHs on this PSFCH occasion; if the above-mentioned first PSFCH is the PSFCH to be received by the terminal, the terminal receives one or more PSFCHs on this PSFCH occasion.

[0477] It can be understood that in an embodiment of the present application, the preset processing order of PSFCH can indicate the processing order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH.

[0478] Exemplarily, in some embodiments, the preset processing order of PSFCH may indicate that the first PSFCH is processed first, or may indicate that the first PSFCH is processed last, or may indicate any processing order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH, and this application does not make any specific limitations.

[0479] That is to say, in an embodiment of the present application, whether it is the first terminal or the second terminal, when receiving or sending PSFCH on the PSFCH occasion, the PSFCH state can be first determined according to the priority data of the PSFCH. If the PSFCH state is the sending state, the PSFCH can be sent on the PSFCH occasion. If the PSFCH state is the receiving state, the PSFCH can be received on the PSFCH occasion.

[0480] Furthermore, in an embodiment of the present application, the first terminal may receive the beam reporting information carried by the first PSFCH based on one or more of the first priority value, the preset reception order of the PSFCH, and the PSFCH reception quantity threshold.

[0481] Accordingly, in an embodiment of the present application, the second terminal may send beam reporting information carried by the first PSFCH based on one or more of the first priority value, the preset sending order of the PSFCH, and the PSFCH sending quantity threshold.

[0482] Exemplarily, in some embodiments, taking the second terminal sending beam reporting information as an example, after the terminal determines whether to send PSFCH or receive PSFCH on a PSFCH occasion, if the terminal will perform a PSFCH sending operation on the PSFCH occasion, it is necessary to further determine how to send the first PSFCH. This is because the maximum power and maximum number of PSFCHs sent by the terminal at the same time are limited. If a certain limit is exceeded, the terminal cannot send all the PSFCHs to be sent and can only choose to send part of the PSFCHs.

[0483] For example, in some embodiments, the number of PSFCHs to be transmitted by the terminal is N sch，Tx，PSFCH The maximum number of PSFCHs that the terminal supports to send simultaneously is N max，PSFCH , the number of PSFCHs finally transmitted by the terminal is N Tx，PSFCH , if N sch，Tx，PSFCH >N max，PSFCH , then N Tx，PSFCH =N max，PSFCH ; If N sch，tx，PSFCH ≤N Max，PSFCH , then N Tx，PSFCH =N sch，tx，PSFCH Since the terminal may have multiple types of PSFCH to be sent, the N Tx，PSFCH Among the PSFCHs, the terminal may send the first PSFCH in the following ways:

[0484] Method 1: The terminal preferentially sends the first PSFCH and sends the first PSFCH with a smaller priority value first, wherein the preset sending order of the PSFCH indicates that the first PSFCH is sent first.

[0485] For example, in some embodiments, FIG22 is a fourth implementation diagram of sending the first PSFCH provided by an embodiment of the present application. As shown in FIG22 , the total number of three types of PSFCHs to be sent by the terminal is 8, the maximum number of PSFCHs supported by the terminal for simultaneous transmission is 4, and the final number of PSFCHs that the terminal can send should be 4. At this time, the terminal will give priority to transmitting the first PSFCH. If all the first PSFCHs can be sent, it will consider sending other types of PSFCHs. However, the number of first PSFCHs is 5 and cannot be sent out. At this time, the first PSFCH is selected in ascending order of priority value, and the final PSFCHs that can be sent are the first PSFCHs with priority values ​​1, 3, 4, and 6.

[0486] Method 2: When the number of PSFCHs carrying other information does not exceed N max，PSFCH The first PSFCH will be sent only when the first PSFCH is sent, wherein the preset sending order of the PSFCH indicates that the first PSFCH is sent last.

[0487] For example, in some embodiments, FIG23 is a fifth implementation diagram of sending the first PSFCH provided by an embodiment of the present application. As shown in FIG23 , the total number of three types of PSFCHs to be sent by the terminal is 8, the maximum number of PSFCHs supported by the terminal for simultaneous transmission is 5, and the final number of PSFCHs that the terminal can send should be 5. At this time, the terminal will give priority to sending PSFCHs other than the first PSFCH. When the first PSFCH is still allowed to be sent, the first PSFCH is selected in ascending order of priority values, and finally the two first PSFCHs with priority values ​​1 and 3 are selected for transmission.

[0488] It can be understood that in an embodiment of the present application, the preset sending order of PSFCH can indicate the sending order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH.

[0489] Exemplarily, in some embodiments, the preset sending order of PSFCH may indicate that the first PSFCH is sent first, or may indicate that the first PSFCH is sent last, or may indicate any sending order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH, and this application does not make any specific limitations.

[0490] It is understandable that in the embodiments of the present application, the terminal capability may also have some restrictions on the number of PSFCHs received. For example, the maximum number of PSFCHs that a terminal can receive simultaneously is N. Rx，PSFCH When the first PSFCH is introduced, the PSFCH reception rules also need to be modified. That is, when receiving the PSFCH, the first terminal needs to limit the maximum number of PSFCHs that can be received simultaneously based on the PSFCH reception number threshold, and also needs to limit the order of receiving different types of PSFCHs based on the preset PSFCH reception order. The first terminal can refer to the principles and methods for sending PSFCHs by the second terminal to receive the PSFCH.

[0491] Furthermore, in an embodiment of the present application, FIG24 is a fourth flowchart of an implementation flow of a sidelink communication method provided in an embodiment of the present application. As shown in FIG24 , the sidelink communication method may include the following steps:

[0492] Step 401: A second terminal receives an SL CSI-RS sent by a first terminal.

[0493] In an embodiment of the present application, the first terminal may send the SL CSI-RS to the second terminal, so that the second terminal performs SL CSI-RS measurement and reports corresponding beam reporting information.

[0494] Step 402: The first terminal receives beam reporting information carried by the first PSFCH sent by the second terminal based on the first priority value corresponding to the first PSFCH.

[0495] In an embodiment of the present application, after the first terminal sends the SL CSI-RS to the second terminal, the first terminal receives the beam reporting information corresponding to the SL CSI-RS sent by the second terminal based on the first priority value; wherein the first priority value is the priority value corresponding to the first PSFCH carrying the beam reporting information.

[0496] For example, in some embodiments, after the first PSFCH is introduced, multiple types and multiple PSFCHs may need to be transmitted / received simultaneously on a PSFCH occasion in the resource pool. In order to coordinate the transmission or reception of the multiple PSFCHs, it is first necessary to determine a priority value for the first PSFCH. Specifically, the following methods may be used:

[0497] Method 1: The priority value of the first PSFCH is determined according to the priority value indicated by the SCI associated therewith, that is, the first priority value can be determined according to the priority reference value indicated by the associated SCI.

[0498] Method 2: The priority value of the first PSFCH is a default integer value, that is, the first priority value can be determined according to the first preset value.

[0499] It should be noted that for the second terminal sending the first PSFCH, it is necessary to determine the priority value of sending the first PSFCH. Correspondingly, for the first terminal receiving the first PSFCH, that is, the terminal sending SL CSI-RS, it is also necessary to determine the relevant priority value when receiving the first PSFCH.

[0500] It can be understood that, in the embodiment of the present application, the priority value of the first PSFCH, that is, the first priority value can be determined based on one or more of the following information: a priority reference value, a first preset value.

[0501] Furthermore, in an embodiment of the present application, the first terminal may receive the beam reporting information carried by the first PSFCH based on one or more of the first priority value, the preset reception order of the PSFCH, and the PSFCH reception quantity threshold.

[0502] Accordingly, in an embodiment of the present application, the second terminal may send beam reporting information carried by the first PSFCH based on one or more of the first priority value, the preset sending order of the PSFCH, and the PSFCH sending quantity threshold.

[0503] For example, in some embodiments, taking the first terminal receiving beam reporting information as an example, after the terminal determines whether to send PSFCH or receive PSFCH on a PSFCH occasion, if the terminal will perform a PSFCH receiving operation on the PSFCH occasion, it is necessary to further determine how to receive the first PSFCH. This is because the maximum number of PSFCHs that the terminal can receive simultaneously is limited. If a certain limit is exceeded, the terminal cannot receive all PSFCHs to be received and can only choose to receive some of the PSFCHs.

[0504] Exemplarily, in some embodiments, the number of PSFCHs to be received by the first terminal is N sch，Rx，PSFCH The maximum number of PSFCHs supported by the first terminal to be received simultaneously (PSFCH reception number threshold) is N max，PSFCH , the number of PSFCHs finally transmitted by the first terminal is N Rx，PSFCH , if N sch，Rx，PSFCH >N max，PSFCH , then N Rx，PSFCH =N max，PSFCH ; If N sch，Rx，PSFCH ≤N Max，PSFCH , then N Rx，PSFCH =N sch，Rx，PSFCH .

[0505] That is, in the embodiment of the present application, considering that there may be multiple types of PSFCHs to be received and the maximum capability of receiving multiple PSFCHs at the same time, the N Rx，PSFCH Among the PSFCHs, the first terminal can receive the first PSFCH based on one or more of the first priority value, the preset reception order of the PSFCH, and the PSFCH reception quantity threshold.

[0506] It can be understood that in an embodiment of the present application, the preset reception order of the PSFCH can indicate the reception order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH.

[0507] Exemplarily, in some embodiments, the preset reception order of PSFCH may indicate that the first PSFCH is received first, or may indicate that the first PSFCH is received last, or may indicate any reception order between the PSFCH carrying HARQ-ACK information, and / or the PSFCH carrying resource conflict information, and / or the first PSFCH, and this application does not make any specific limitations.

[0508] In summary, the side link communication method proposed in the embodiment of the present application can propose a method for determining the SL CSI-RS related priority (second priority value) for the standalone and non-standalone SL CSI-RS introduced in SL FR2, as well as a method for determining the priority (first priority value) of the PSFCH associated with the SL CSI-RS. In addition, after introducing the priority of the PSFCH associated with the SL CSI-RS, the method proposed in the embodiment of the present application can also enhance the PSFCH receiving / transmitting rules.

[0509] The embodiment of the present application proposes a side link communication scheme, in which a first terminal receives beam reporting information sent by a second terminal; wherein the beam reporting information includes beam reporting information corresponding to the SL CSI-RS, and the first terminal receives the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH. Correspondingly, the second terminal sends the beam reporting information carried by the first PSFCH to the first terminal based on the first priority information corresponding to the first PSFCH. That is to say, in the embodiment of the present application, for the PSFCH carrying the beam reporting information corresponding to the SL CSI-RS, the priority information corresponding to the PSFCH can be introduced, so that the priority information of the PSFCH can be used to receive or send the beam reporting information. It can be seen that the embodiment of the present application further optimizes the PSFCH sending / receiving mechanism by determining the priority information of the PSFCH associated with the SL CSI-RS, improves the relevant mechanism for the terminal to send and receive the PSFCH, thereby ensuring the effectiveness of the beam management mechanism and improving the communication reliability.

[0510] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, the technical solution of the present application can be subjected to a variety of simple modifications, and these simple modifications all fall within the scope of protection of the present application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will no longer describe the various possible combinations separately. For another example, the various different embodiments of the present application can also be arbitrarily combined, as long as they do not violate the idea of ​​the present application, they should also be regarded as the contents disclosed in the present application. For another example, under the premise of no conflict, the various embodiments and / or the technical features in each embodiment described in the present application can be arbitrarily combined with the prior art, and the technical solution obtained after the combination should also fall within the scope of protection of the present application.

[0511] It should also be understood that in the various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply a precedence in the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. In addition, in the embodiments of the present application, the terms "downlink," "uplink," and "sidelink" are used to indicate the transmission direction of signals or data, where "downlink" is used to indicate the first direction of transmission of signals or data from a site to a user equipment in a cell, "uplink" is used to indicate the second direction of transmission of signals or data from a user equipment in a cell to a site, and "sidelink" is used to indicate the third direction of transmission of signals or data from user equipment 1 to user equipment 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. Specifically, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0512] FIG25 is a schematic diagram of the first structural composition of a sidelink communication device provided in an embodiment of the present application, which is applied to a first terminal. As shown in FIG25 , the device includes:

[0513] Receiving unit 2501 is used to receive beam reporting information sent by the second terminal; wherein the beam reporting information includes beam reporting information corresponding to SLCSI-RS, and the first terminal receives the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH.

[0514] Those skilled in the art should understand that the relevant description of the above-mentioned side link communication device in the embodiment of the present application can be understood with reference to the relevant description of the side link communication method in the embodiment of the present application.

[0515] FIG26 is a second schematic diagram of the structural composition of a sidelink communication device provided in an embodiment of the present application, which is applied to a second terminal. As shown in FIG26 , the device includes:

[0516] Sending unit 2601 is used to send beam reporting information to the first terminal; wherein the beam reporting information includes beam reporting information corresponding to SL CSI-RS, and the second terminal sends the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH.

[0517] Those skilled in the art should understand that the relevant description of the above-mentioned side link communication device in the embodiment of the present application can be understood with reference to the relevant description of the side link communication method in the embodiment of the present application.

[0518] Figure 27 is a schematic structural diagram of a communication device provided in an embodiment of the present application. The communication device 2700 shown in Figure 27 includes a processor 2710. The processor 2710 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0519] Optionally, as shown in FIG27 , the communication device 2700 may further include a memory 2720. The processor 2710 may call and execute a computer program from the memory 2720 to implement the method in the embodiment of the present application.

[0520] The memory 2720 may be a separate device independent of the processor 2710 , or may be integrated into the processor 2710 .

[0521] Optionally, as shown in FIG27 , the communication device 2700 may further include a transceiver 2730 , and the processor 2710 may control the transceiver 2730 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0522] The transceiver 2730 may include a transmitter and a receiver. The transceiver 2730 may further include an antenna, and the number of antennas may be one or more.

[0523] The communication device 2700 may specifically be a terminal in an embodiment of the present application, and the communication device 1200 may implement the corresponding processes implemented by the terminal in each method in the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0524] Figure 28 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 2800 shown in Figure 28 includes a processor 2810, which can call and run a computer program from a memory to implement the method according to the embodiment of the present application.

[0525] Optionally, as shown in FIG28 , the chip 2800 may further include a memory 2820 , wherein the processor 2810 may call and execute a computer program from the memory 2820 to implement the method in the embodiment of the present application.

[0526] The memory 2820 may be a separate device independent of the processor 2810 , or may be integrated into the processor 2810 .

[0527] Optionally, the chip 2800 may further include an input interface 2830. The processor 2810 may control the input interface 2830 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0528] Optionally, the chip 2800 may further include an output interface 2840. The processor 2810 may control the output interface 2840 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0529] The chip can be applied to the terminal in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the terminal in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0530] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0531] It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. 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.

[0532] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0533] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0534] The present application also provides a computer-readable storage medium for storing a computer program. This computer-readable storage medium can be applied to a terminal in the present application, and the computer program causes a computer to execute the corresponding processes implemented by the terminal in each method of the present application. For the sake of brevity, these are not further described here.

[0535] The present application also provides a computer program product including computer program instructions. This computer program product can be applied to a terminal in the present application, and the computer program instructions cause a computer to execute the corresponding processes implemented by the terminal in each method of the present application. For the sake of brevity, these instructions are not further described here.

[0536] The present application also provides a computer program. This computer program can be applied to the terminal in the present application. When the computer program is executed on a computer, it causes the computer to execute the corresponding process implemented by the terminal in each method of the present application. For the sake of brevity, it is not further described here.

[0537] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0538] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0539] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0540] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0541] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0542] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, 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. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0543] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A sidelink communication method, the method comprising: The first terminal receives beam reporting information sent by the second terminal; wherein the beam reporting information includes beam reporting information corresponding to the sidelink channel state information reference signal SL CSI-RS, and the first terminal receives the beam reporting information carried by the first physical sidelink feedback channel PSFCH based on the first priority information corresponding to the first PSFCH.

2. The method according to claim 1, wherein The first priority information is determined based on one or more of the following information: the second priority information of the SL CSI-RS, a priority reference value, and a first preset value.

3. The method according to claim 2, wherein: The first terminal sends first information to the second terminal; wherein the first information is used to indicate second priority information of the SL CSI-RS.

4. The method according to claim 3, wherein: The second priority information is determined based on one or more of the following information: a preset mapping relationship between application type and priority information, priority information associated with allocated transmission resources, priority information of data to be transmitted, and a second preset value.

5. The method according to claim 4, wherein The preset mapping relationship between the application type and the priority information is used to determine the correspondence between the beam application type and the priority information; wherein, the beam application type includes one or more of the following types: initial beam pairing, beam maintenance, beam failure recovery and candidate transmission beam selection.

6. The method according to claim 4 or 5, wherein: The second priority information is priority information corresponding to the beam application type of the SL CSI-RS, determined according to a preset mapping relationship between the application type and the priority information.

7. The method according to claim 6, wherein: In the case that the SL CSI-RS and sidelink SL data are transmitted in the same time slot, if the priority information corresponding to the beam application type of the SL CSI-RS is less than or equal to the priority information of the SL data, then the second priority information indicated by the first information is the priority information corresponding to the beam application type of the SL CSI-RS; if the priority information corresponding to the beam application type of the SL CSI-RS is greater than the priority information of the SL data, then the second priority information indicated by the first information is the priority information of the SL data.

8. The method according to claim 4, wherein The second priority information is priority information associated with the allocated transmission resources; wherein the allocated transmission resources are used to simultaneously transmit the SL CSI-RS and SL data.

9. The method according to claim 4, wherein: The second priority information is determined based on minimum priority information among the priority information corresponding to the data to be transmitted in the logical channel.

10. The method according to claim 4, wherein: The second priority information is the second preset value.

11. The method according to any one of claims 3 to 8, wherein: The first information is carried in first signaling associated with the SL CSI-RS; the first signaling includes sidelink control information SCI.

12. The method according to claim 11, wherein The one or more SL CSI-RSs and the first signaling are transmitted in the same time slot.

13. The method according to any one of claims 2 to 12, wherein: The first priority information is determined based on the second priority information corresponding to the SL CSI-RS; wherein the beam reporting information includes a beam reporting information corresponding to the SL CSI-RS.

14. The method according to any one of claims 2 to 12, wherein: The first priority information is determined based on the minimum priority information among the multiple second priority information corresponding to the multiple SL CSI-RSs; wherein the beam reporting information includes multiple beam reporting information corresponding to the multiple SL CSI-RSs.

15. The method according to claim 2, wherein: The first priority information is determined according to the priority reference value indicated by the SCI associated with the SL CSI-RS.

16. The method according to claim 15, wherein The first priority information is determined based on a priority reference value indicated by the SCI; wherein the first PSFCH is associated with one of the SCIs.

17. The method according to claim 15, wherein: The first priority information is determined based on minimum priority information among a plurality of priority reference values ​​indicated by a plurality of SCIs; wherein the first PSFCH is associated with a plurality of the SCIs.

18. The method according to claim 2, wherein: The first priority information is the first preset value.

19. The method according to any one of claims 1 to 18, wherein: Receiving, by the first terminal, the beam reporting information carried by the first PSFCH based on the first priority corresponding to the first PSFCH, including: The first terminal receives the beam reporting information carried by the first PSFCH based on the first priority information and the PSFCH state; wherein the PSFCH state includes a sending state or a receiving state.

20. The method according to claim 19, wherein The PSFCH state is determined based on a preset processing order of the PSFCH and a first PSFCH set; wherein the preset processing order of the PSFCH includes processing the first PSFCH first, or processing the first PSFCH last; the first PSFCH set includes one or more first PSFCHs to be sent, and / or one or more first PSFCHs to be received.

21. The method according to claim 20, wherein Receiving, by the first terminal, the beam reporting information carried by the first PSFCH based on the first priority corresponding to the first PSFCH, including: The first terminal receives the beam reporting information carried by the first PSFCH based on one or more of the first priority information, the preset reception order of the PSFCH, and the PSFCH reception quantity threshold; wherein, the PSFCH reception quantity threshold represents the upper limit number N of PSFCH transmission opportunities corresponding to the SL CSI-RS that can simultaneously receive PSFCHs, and N is an integer greater than 0.

22. The method according to claim 21, wherein When the preset reception order of the PSFCH indicates that the first PSFCH is received first and the number of first PSFCHs to be received is greater than N, the first terminal receives the beam reporting information based on the N first PSFCHs to be received with the smallest priority information.

23. The method according to claim 22, wherein When the preset reception order of the PSFCH indicates that the first PSFCH is received first, and the number of the first PSFCHs to be received is less than or equal to N, the first terminal receives the beam reporting information based on all the first PSFCHs to be received.

24. The method according to claim 22, wherein When the preset reception order of the PSFCH indicates priority reception of the PSFCH carrying hybrid automatic repeat request positive confirmation HARQ-ACK information and the PSFCH carrying resource conflict information, and the number Q of PSFCHs to be received is less than or equal to N, the first terminal receives the beam reporting information based on the NQ first PSFCHs to be received with the smallest priority information; wherein Q is an integer greater than 0.

25. A sidelink communication method, the method comprising: The second terminal sends beam reporting information to the first terminal; wherein the beam reporting information includes beam reporting information corresponding to the SL CSI-RS, and the second terminal sends the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH.

26. The method according to claim 23, wherein The first priority information is determined based on one or more of the following information: the second priority information of the SL CSI-RS, a priority reference value, and a first preset value.

27. The method according to claim 26, wherein The second terminal receives first information sent by the first terminal; wherein the first information is used to indicate second priority information of the SL CSI-RS.

28. The method according to claim 27, wherein The second priority information is determined by the first terminal based on one or more of the following information: a preset mapping relationship between application type and priority information, priority information associated with allocated transmission resources, priority information of data to be transmitted, and a second preset value.

29. The method according to claim 28, wherein The preset mapping relationship between the application type and the priority information is used to determine the correspondence between the beam application type and the priority information; wherein, the beam application type includes one or more of the following types: initial beam pairing, beam maintenance, beam failure recovery and candidate transmission beam selection.

30. The method according to claim 28 or 29, wherein The second priority information is priority information corresponding to the beam application type of the SL CSI-RS, determined according to a preset mapping relationship between the application type and the priority information.

31. The method according to claim 30, wherein In the case that the SL CSI-RS and SL data are transmitted in the same time slot, if the priority information corresponding to the beam application type of the SL CSI-RS is less than or equal to the priority information of the SL data, then the second priority information indicated by the first information is the priority information corresponding to the beam application type of the SL CSI-RS; if the priority information corresponding to the beam application type of the SL CSI-RS is greater than the priority information of the SL data, then the second priority information indicated by the first information is the priority information of the SL data.

32. The method of claim 28, wherein: The second priority information is priority information associated with the allocated transmission resources; wherein the allocated transmission resources are used to simultaneously transmit the SL CSI-RS and SL data.

33. The method of claim 28, wherein: The second priority information is determined based on minimum priority information among the priority information corresponding to the data to be transmitted in the logical channel.

34. The method of claim 28, wherein The second priority information is the second preset value.

35. The method according to any one of claims 27 to 32, wherein: The first information is carried in first signaling associated with the SL CSI-RS; the first signaling includes sidelink control information SCI.

36. The method according to claim 35, wherein The one or more SL CSI-RSs and the first signaling are transmitted in the same time slot.

37. The method according to any one of claims 26 to 36, wherein: The first priority information is determined based on the second priority information corresponding to the SL CSI-RS; wherein the beam reporting information includes a beam reporting information corresponding to the SL CSI-RS.

38. The method according to any one of claims 26 to 36, wherein: The first priority information is determined based on the minimum priority information among the multiple second priority information corresponding to the multiple SL CSI-RSs; wherein the beam reporting information includes multiple beam reporting information corresponding to the multiple SL CSI-RSs.

39. The method of claim 26, wherein: The first priority information is determined according to the priority reference value indicated by the SCI associated with the SL CSI-RS.

40. The method of claim 39, wherein The first priority information is determined based on a priority reference value indicated by the SCI; wherein the first PSFCH is associated with one of the SCIs.

41. The method of claim 39, wherein The first priority information is determined based on minimum priority information among a plurality of priority reference values ​​indicated by a plurality of SCIs; wherein the first PSFCH is associated with a plurality of the SCIs.

42. The method of claim 26, wherein: The first priority information is the first preset value.

43. The method according to any one of claims 25 to 42, wherein: The second terminal sending the beam reporting information carried by the first PSFCH based on the first priority corresponding to the first PSFCH, including: The second terminal sends the beam reporting information carried by the first PSFCH based on the first priority information and the PSFCH state; wherein the PSFCH state includes a sending state or a receiving state.

44. The method according to claim 43, wherein The PSFCH state is determined based on a preset processing order of the PSFCH and a first PSFCH set; wherein the preset processing order of the PSFCH includes processing the first PSFCH first, or processing the first PSFCH last; the first PSFCH set includes one or more first PSFCHs to be sent, and / or one or more first PSFCHs to be received.

45. The method of claim 44, wherein: The second terminal sending the beam reporting information carried by the first PSFCH based on the first priority corresponding to the first PSFCH, including: The second terminal sends the beam reporting information carried by the first PSFCH based on one or more of the first priority information, the preset sending order of PSFCH and the PSFCH sending quantity threshold; wherein, the PSFCH sending quantity threshold represents the upper limit number M of PSFCH transmission opportunities corresponding to the SL CSI-RS that can simultaneously send PSFCHs, and M is an integer greater than 0.

46. ​​The method of claim 45, wherein The second terminal sends the beam reporting information based on the K first PSFCHs to be sent with the smallest priority information; wherein K is an integer greater than 0 and less than or equal to M.

47. A sidelink communication device, applied to a first terminal, the device comprising: A receiving unit is used to receive beam reporting information sent by the second terminal; wherein the beam reporting information includes beam reporting information corresponding to SL CSI-RS, and the first terminal receives the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH.

48. A sidelink communication device, applied to a second terminal, the device comprising: A sending unit is used to send beam reporting information to the first terminal; wherein the beam reporting information includes beam reporting information corresponding to SL CSI-RS, and the second terminal sends the beam reporting information carried by the first PSFCH based on the first priority information corresponding to the first PSFCH.

49. A terminal comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to perform the method according to any one of claims 1 to 24, or the method according to any one of claims 25 to 46.

50. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip performs the method according to any one of claims 1 to 24, or the method according to any one of claims 25 to 46.

51. A computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 24 or any one of claims 25 to 46.

52. A computer program product comprising computer program instructions, the computer program instructions causing a computer to perform the method of any one of claims 1 to 24, or the method of any one of claims 25 to 46.

53. A computer program, the computer program causing a computer to perform the method of any one of claims 1 to 24, or any one of claims 25 to 46.

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