Lateral transmission method and terminal equipment

Abstract

The invention provides a sidewalk transmission method and terminal equipment. The method comprises the following steps: first terminal equipment transmits beam failure indication information to second terminal equipment through a sidewalk link. In the embodiments of the present application, the first terminal device can transmit the beam failure indication information to the second terminal device through the sidelink to indicate whether the beam failure occurs in the second terminal device, which is helpful for performing a beam recovery process in time when the beam failure occurs, thereby improving the user experience. Therefore, the sidewalk communication between the first terminal equipment and the second terminal equipment is recovered.

Description

Side transmission method and terminal equipment

[0001] The present application relates to the field of communication technology, and more specifically, to a side transmission method and terminal equipment.

[0002] At present, in order to improve the transmission rate of the sideline system, the use of millimeter wave frequency bands in sideline communications is considered. In the sideline communication process based on the millimeter wave frequency band, the sideline data can be transmitted between terminal devices by means of analog beams. However, due to the large loss of the millimeter wave frequency band and the narrow coverage direction of the analog beam, the sideline link for transmitting sideline data is easily blocked, thereby reducing the communication quality of the sideline communication and even causing the sideline communication to be interrupted.

[0003] Generally, when the communication quality is poor to a certain extent, it can be called a beam failure. If a beam failure occurs, how the terminal device receiving the sideline data (also called the "first terminal device") reports the beam failure indication information to the terminal device sending the sideline data (also called the "second terminal device") is an urgent problem to be solved.

[0004]

[0005] The present application provides a side transmission method and a terminal device. The following introduces various aspects involved in the present application.

[0006] In a first aspect, a sidelink transmission method is provided, comprising: a first terminal device transmitting beam failure indication information to a second terminal device via a sidelink.

[0007] In a second aspect, a sidelink transmission method is provided, comprising: a second terminal device receives beam failure indication information transmitted by a first terminal device via a sidelink.

[0008] According to a third aspect, a terminal device is provided, where the terminal device is a first terminal device and includes: a processing unit configured to transmit beam failure indication information to a second terminal device via a side link.

[0009] In a fourth aspect, a terminal device is provided, where the terminal device is a second terminal device and includes: a processing unit configured to receive beam failure indication information transmitted by the first terminal device via a side link.

[0010] In a fifth aspect, a terminal device is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal device executes a method as described in any one of the above aspects.

[0011] In a sixth aspect, a device is provided, comprising a processor, configured to call a program from a memory so that the device executes a method as described in any one of the above aspects.

[0012] In a seventh aspect, a chip is provided, comprising a processor for calling a program from a memory so that a device equipped with the chip executes a method as described in any one of the above aspects.

[0013] In an eighth aspect, a computer-readable storage medium is provided, on which a program is stored, wherein the program enables a computer to execute a method as described in any one of the above aspects.

[0014] In a ninth aspect, a computer program product is provided, comprising a program, wherein the program enables a computer to execute a method as described in any one of the above aspects.

[0015] In a tenth aspect, a computer program is provided, wherein the computer program enables a computer to execute a method as described in any one of the above aspects.

[0016] In an embodiment of the present application, the first terminal device can transmit beam failure indication information to the second terminal device via a side link to indicate whether a beam failure has occurred in the second terminal device, which helps to perform a beam recovery process in a timely manner in the event of a beam failure to restore the side link communication between the first terminal device and the second terminal device.

[0017] FIG. 1 is a wireless communication system 100 to which an embodiment of the present application is applied.

[0018] FIG2 shows the frame structure of a system frame that does not carry PSFCH in NR-V2X.

[0019] FIG3 shows the frame structure of a system frame carrying PSFCH in NR-V2X.

[0020] FIG4 shows a communication process based on beam communication in a scenario where a network device communicates with a terminal.

[0021] FIG5 shows a communication process based on beam communication in a scenario where a network device communicates with a terminal.

[0022] FIG6 is a schematic flow chart of the side transmission method in an embodiment of the present application.

[0023] FIG. 7 is a schematic diagram of a method for transmitting beam failure indication information in an embodiment of the present application.

[0024] FIG8 is a schematic diagram of a transmission method of beam failure indication information in another embodiment of the present application.

[0025] FIG. 9 is a schematic diagram of a transmission method of beam failure indication information in another embodiment of the present application.

[0026] FIG. 10 is a schematic diagram of a terminal device according to an embodiment of the present application.

[0027] FIG. 11 is a schematic diagram of a terminal device according to another embodiment of the present application.

[0028] FIG. 12 is a schematic structural diagram of a device according to an embodiment of the present application.

[0029] The technical solution in the present application will be described below in conjunction with the accompanying drawings. For ease of understanding, the following first introduces the terms and communication processes involved in the present application in conjunction with Figures 1 to 7.

[0030] 1 is a wireless communication system 100 applicable to an embodiment of the present application. The wireless communication system 100 may include a network device 110 and terminals 121 to 129. The network device 110 may provide communication coverage for a specific geographical area and may communicate with terminals located in the coverage area.

[0031] In some implementations, terminals may communicate with each other via a sidelink (SL). Sidelink communication may also be referred to as proximity services (ProSe) communication, unilateral communication, sidelink communication, or device to device (D2D) communication.

[0032] In other words, sidelink data is transmitted between terminals via a sidelink. The sidelink data may include data and / or control signaling. In some implementations, the sidelink data may be, for example, a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), a PSCCH demodulation reference signal (DMRS), a PSSCH DMRS, a physical sidelink feedback channel (PSFCH), etc.;

[0033] The following introduces several common sidelink communication scenarios in conjunction with Figure 1. In sidelink communication, four scenarios can be divided according to whether the terminal in the sidelink is within the coverage of the network device. Scenario 1: The terminal performs sidelink communication within the coverage of the network device. Scenario 2: Some terminals perform sidelink communication within the coverage of the network device. Scenario 3: The terminal performs sidelink communication outside the coverage of the network device.

[0034] As shown in FIG1 , in scenario 1, terminals 121-122 can communicate via a side link, and terminals 121-122 are all within the coverage of network device 110, or in other words, terminals 121-122 are all within the coverage of the same network device 110. In this scenario, network device 110 can send configuration signaling to terminals 121-122, and accordingly, terminals 121-122 communicate via a side link based on the configuration signaling.

[0035] As shown in FIG1 , in scenario 2, terminals 123 to 124 can communicate via a side link, and terminal 123 is within the coverage of network device 110, while terminal 124 is outside the coverage of network device 110. In this scenario, terminal 123 receives configuration information from network device 110 and communicates via a side link based on the configuration of the configuration signaling. However, for terminal 124, since terminal 124 is outside the coverage of network device 110, it is unable to receive the configuration information of network device 110. At this time, terminal 124 can obtain the configuration of the side link communication based on the configuration information according to the pre-configuration and / or the configuration information sent by terminal 123 within the coverage, so as to communicate with terminal 123 via the side link based on the acquired configuration.

[0036] In some cases, terminal 123 may send the above configuration information to terminal 124 via a physical sidelink broadcast channel (PSBCH) to configure terminal 124 to communicate via the sidelink.

[0037] As shown in Fig. 1, in scenario 3, terminals 125-129 are all outside the coverage of network device 110 and cannot communicate with network device 110. In this case, the terminals can configure sidelink communication based on pre-configuration information.

[0038] In some cases, the terminals 127-129 located outside the coverage of the network device can form a communication group, and the terminals 127-129 in the communication group can communicate with each other. In addition, the terminal 127 in the communication group can serve as a central control node, also known as a cluster header terminal (CH), and correspondingly, the terminals in other communication groups can be called "group members".

[0039] Terminal 127 as a CH may have one or more of the following functions: responsible for establishing a communication group; joining and leaving of group members; coordinating resources, allocating side transmission resources to group members, receiving side transmission feedback information from group members; coordinating resources with other communication groups, etc.

[0040] It should be noted that Figure 1 exemplarily shows a network device and multiple terminal devices. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area. This embodiment of the present application does not limit this.

[0041] Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

[0042] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) system or new radio (new radio, NR), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), etc. The technical solutions provided by the present application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0043] The terminal in the embodiment of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal device, wireless communication device, user agent or user device. The terminal device in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, and may be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiment of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides side data between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using side data. Cellular phones and smart home devices communicate with each other without relaying communication signals through a base station.

[0044] The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a base station. The network device in the embodiment of the present application may refer to a wireless access network (RAN) node (or device) that connects a terminal device to a wireless network. Base station can broadly cover various names as follows, or replace with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station MeNB, auxiliary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, base band unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, a modem or a chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in device-to-device D2D, vehicle-to-everything (V2X), machine-to-machine (M2M) communications, a network-side device in a 6G network, and a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form used by the network equipment.

[0045] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0046] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device includes a CU and a DU. The gNB may also include an AAU.

[0047] The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air. The embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.

[0048] It should be understood that all or part of the functions of the communication device in the present application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (eg, a cloud platform).

[0049] Sideline communication mode

[0050] Some standards or protocols (such as the 3rd Generation Partnership Project (3GPP)) define two modes of sideline communication: a first mode and a second mode.

[0051] In the first mode, the resources of the terminal device (the resources mentioned in this application may also be referred to as transmission resources, such as time-frequency resources) are allocated by the network device. The terminal device can send data on the sidelink according to the resources allocated by the network device. The network device can allocate resources for a single transmission to the terminal device, or it can allocate resources for semi-static transmission to the terminal device. This first mode can be applied to scenarios covered by network devices, such as the scenario shown in Figure 2 above. In the scenario shown in Figure 2, the terminal device 120a is within the network coverage of the network device 110, so the network device 110 can allocate resources used in the sidelink transmission process to the terminal device 120a.

[0052] In the second mode, the terminal device can autonomously select one or more resources in a resource pool (RP). Then, the terminal device can perform side transmission according to the selected resources. For example, in the scenario shown in FIG4, the terminal device 120b is located outside the cell coverage. Therefore, the terminal device 120b can autonomously select resources from a preconfigured resource pool for side transmission. Alternatively, in the scenario shown in FIG2, the terminal device 120a can also autonomously select one or more resources from a resource pool configured by the network device 110 for side transmission.

[0053] Sidelink transmission mode

[0054] With the development of autonomous driving technology, autonomous driving technology can be integrated with communication systems, or in other words, data interaction between vehicle-mounted devices needs to be achieved through communication systems. Therefore, higher requirements are placed on communication systems. For example, communication systems are required to support higher throughput, lower latency, higher reliability, larger coverage, more flexible resource allocation, etc. In LTE-V2X, only broadcasting is supported for sidelink communication between terminals. With the development of technology, unicast and multicast transmission methods are introduced in NR-V2X.

[0055] For unicast transmission, there is usually only one terminal receiving the sidelink data. Referring to FIG1 , terminal 121 and terminal 122 can communicate via unicast transmission, and when terminal 121 sends sidelink data via the sidelink, terminal 122 receives the sidelink data as the only receiving device.

[0056] For the multicast transmission mode, the terminals receiving the sideline data may be all the terminals in a communication group, or the terminals receiving the sideline data may be all the terminals within a certain transmission distance. For example, referring to FIG1, for a communication group including terminals 127 to 129, when terminal 127 sends the sideline data in a multicast manner, the other terminals 128 to 129 in the communication group are all receiving terminals receiving the sideline data. For another example, referring to FIG1, assuming that the terminals within the preset range include terminals 127 to 129, when terminal 127 sends the sideline data in a multicast manner, the other terminals 128 to 129 within the preset range are all receiving terminals receiving the sideline data.

[0057] For the broadcast transmission mode, the terminal receiving the sideline data can be any terminal around the terminal as the transmitter. For example, referring to FIG1 , assuming that the terminal 125 is the transmitter and sends the sideline data in the form of broadcast, the terminals 121-124 and 126-129 located around the terminal 125 can all serve as the receivers of the sideline data.

[0058] System frame structure

[0059] The following describes the frame structure of the sidelink system frame applicable to the embodiment of the present application in conjunction with Figures 2 and 3. Figure 2 shows the frame structure of a system frame that does not carry PSFCH in NR-V2X. Figure 3 shows the frame structure of a system frame that carries PSFCH in NR-V2X.

[0060] See Figure 2. In the time domain, the side symbols occupied by PSCCH start from the second side symbol of the system frame (for example, orthogonal frequency division multiplexing (OFDM) symbol) and occupy 2 or 3 side symbols. In the frequency domain, PSCCH can occupy {10, 12 15, 20, 25} physical resource blocks (PRBs). Generally, in order to reduce the complexity of blind detection of PSCCH by terminal equipment, only one number of PSCCH symbols and PRBs are allowed to be configured in a resource pool. In addition, since the subchannel is the minimum granularity of PSSCH resource allocation specified in NR-V2X, the number of PRBs occupied by PSCCH must be less than or equal to the number of PRBs contained in a subchannel in the resource pool, so as to avoid additional restrictions on the resource selection or allocation of PSSCH.

[0061] Continuing to refer to Figure 2, in the time domain, the PSSCH also starts from the second sideline symbol of the system frame and ends at the penultimate sideline symbol of the system frame. In the frequency domain, the PSSCH occupies K subchannels of the system frame, each subchannel includes N consecutive PRBs, and K and N are positive integers.

[0062] Usually, the last symbol of the system frame is a guard period (GP) symbol. In addition, the first sideline symbol of the system frame is a repetition of the second sideline symbol. Usually, when a terminal receives the system frame, the first sideline symbol can be used as an automatic gain control (AGC) symbol. The data on the AGC symbol is usually not used for data demodulation.

[0063] 3, when the system frame carries the PSFCH channel, the second to last sideline symbol and the third to last sideline symbol in the system frame are used for PSFCH transmission. In addition, a sideline symbol before the sideline symbol carrying the PSFCH in the system frame is used as the GP.

[0064] Multi-beam system

[0065] The design goals of communication systems (e.g., NR) include large-bandwidth communications in high-frequency bands (e.g., bands above 6 GHz). When the operating frequency becomes higher, the path loss during transmission will increase, thereby affecting the coverage capability of the high-frequency system. Therefore, in order to effectively ensure the coverage of high-frequency bands, an effective technical solution is based on massive antenna arrays (Massive multiple-in multipleout, Massive MIMO) to form a shaped beam with greater gain, overcome propagation loss, and ensure the coverage of the communication system.

[0066] At present, the most common large-scale antenna array is the millimeter wave antenna array. Since the wavelength emitted by the millimeter wave antenna array is shorter, the spacing between antenna elements of the antenna array can be shorter and the aperture of the antenna array can be smaller, so that more physical antenna elements can be integrated into a two-dimensional antenna array of limited size.

[0067] In addition, due to the limited size of the millimeter wave antenna array, digital beamforming cannot be used due to factors such as hardware complexity, cost overhead, and power consumption. Instead, analog beamforming is usually used, which can enhance network coverage while reducing the complexity of device implementation.

[0068] To facilitate understanding of the multi-beam system, the following text introduces the communication process based on beam communication by taking the scenario of communication between a network device and a terminal as an example in combination with Figures 4 and 5.

[0069] 4, in a conventional communication system (e.g., 2G, 3G, or 4G communication system), a relatively wide beam 410 is usually used to cover the entire cell (or "sector"). Thus, at each moment, the terminals (e.g., terminals 411-415) in the cell can communicate with the network device through the relatively wide beam, for example, to obtain the transmission resources allocated by the network device.

[0070] Referring to FIG. 5 , in newer communication systems (e.g., NR), a multi-beam system 510 can be used to cover the entire cell. That is, each beam in the multi-beam system (e.g., beams 511 to 514) covers a smaller range in the cell, and beam sweeping is used to achieve the effect of multiple beams covering the entire cell.

[0071] During the beam scanning process, different beams are used at different times to cover different areas in the cell. For example, at time 1, the communication system can cover the area where terminal 521 is located through beam 511. At time 2, the communication system can cover the area where terminal 522 is located through beam 512. At time 3, the communication system can cover the areas where terminals 523 and 524 are located through beam 513. At time 4, the communication system can cover the area where terminal 525 is located through beam 514.

[0072] For multi-beam systems, due to the use of narrower beams, the transmission energy can be more concentrated, so it can cover a longer distance. However, it is precisely because the beams are narrow that each beam can only cover part of the area in the cell, so the multi-beam system can be understood as "trading time for space."

[0073] Generally, a beam used by a transmitting end to transmit a signal is called a “transmitting beam”, and a beam used by a receiving end to receive a signal is called a “receiving beam”.

[0074] In some cases, the transmit beam may also be referred to as a spatial domain transmit filter, and accordingly, the receive beam may also be referred to as a spatial domain reception filter. In other cases, the beam may be referred to as a spatial domain transmission filter, and accordingly, sending a signal through the transmit beam may be described as transmitting a signal based on a spatial domain transmission filter, or sending a signal based on a spatial domain transmission filter and receiving a signal through a receive beam may be described as receiving a signal based on a spatial domain transmission filter. In other cases, the transmit beam may also be referred to as a spatial domain transmission parameter, and accordingly, the receive beam may also be referred to as a spatial domain reception parameter.

[0075] In the communication scenario between a network device and a terminal, if the network device and the terminal support multi-beam transmission, then before the network device communicates with the terminal, both the network device and the terminal need to select appropriate transmit beams and receive beams through processes such as beam selection and beam measurement. For example, in the process of transmitting beam selection, the network device can use different transmit beams to send multiple reference signals in turn, and the resources corresponding to the multiple reference signals are different. Correspondingly, the terminal also uses multiple receive beams to receive the above-mentioned multiple reference signals respectively, and measures the detected reference signals to obtain measurement results. Then, the terminal selects some reference signals from the multiple reference signals detected, and feeds back the resource identifiers of the above-mentioned part of the reference signals and their corresponding measurement results to the network device, so that the network device selects a suitable transmit beam as the transmit beam for subsequent communication with the terminal.

[0076] At present, in order to improve the transmission rate of the sidewalk system, the use of millimeter wave frequency bands in sidewalk communications is considered. In the sidewalk communication process based on the millimeter wave frequency band, the terminal devices can communicate with each other through simulated beams. However, due to the large loss of the millimeter wave frequency band and the narrow coverage direction of the simulated beam, the sidewalk link used for sidewalk communication is easily blocked, thereby reducing the communication quality of the sidewalk communication and even causing the sidewalk communication to be interrupted.

[0077] Generally, when the communication quality is poor to a certain extent, it can be called a beam failure. If a beam failure occurs, how the receiving terminal of the sideline communication (i.e., the "receiving end of the sideline data", also called the "first terminal device") reports the beam failure indication information to the sending terminal of the sideline communication (i.e., the "sending end of the sideline data", also called the "second terminal device") is an urgent problem to be solved.

[0078] Therefore, an embodiment of the present application provides a side transmission method, in which the first terminal device can transmit beam failure indication information to the second terminal device through a side link to indicate whether a beam failure occurs in the second terminal device, which helps to perform a beam recovery process in a timely manner in the event of a beam failure to restore the side communication between the first terminal device and the second terminal device. For ease of understanding, the following is a schematic flow chart of the side transmission method of an embodiment of the present application in conjunction with Figure 6. The method shown in Figure 6 includes step S610.

[0079] In step S610, the first terminal device transmits beam failure indication information to the second terminal device via a side link.

[0080] In some implementations, the beam failure indication information is used to indicate that a beam failure has occurred. Of course, in the embodiment of the present application, the beam failure indication information can also be used to indicate that no beam failure has occurred, which is not limited in the embodiment of the present application.

[0081] In the embodiment of the present application, the transmission method of the beam failure indication information is not limited. For example, the beam failure indication information can be transmitted based on a unicast method. For another example, the beam failure indication information can be transmitted based on a broadcast method.

[0082] For ease of understanding, the following text introduces the spatial domain transmission filter corresponding to the beam failure indication information provided in the embodiment of the present application in combination with transmission mode 1 to transmission mode 3, wherein the spatial domain transmission filter corresponding to the beam failure indication information includes the spatial domain transmission filter for transmitting the beam failure indication information, and / or, the spatial domain transmission filter for receiving the beam failure indication information.

[0083] In transmission mode 1, the transmission process of beam failure indication information includes multiple sub-transmission processes, and the multiple sub-transmission processes transmit the beam failure indication information based on different spatial domain transmission filters.

[0084] In some implementations, the above-mentioned transmission of beam failure indication information based on different spatial transmission filters can be understood as transmitting beam failure indication information based on different beams. For example, the first terminal device can use beam scanning to transmit beam failure indication information through different beams.

[0085] In an embodiment of the present application, the first terminal device can transmit beam failure indication information based on different spatial transmission filters, which helps to improve the success rate of transmitting beam failure indication information.

[0086] In an embodiment of the present application, the above-mentioned different spatial domain transmission filters may be different spatial domain transmission filters among the multiple spatial domain transmission filters supported (or, usable) by the first terminal device. For example, there are a total of X spatial domain transmission filters that can be used by the first terminal device, X is an integer and X≥1, then the above-mentioned different spatial domain transmission filters may be different spatial domain transmission filters among the X spatial domain transmission filters. Of course, in an embodiment of the present application, the above-mentioned different spatial domain transmission filters may be different spatial domain transmission filters among some of the spatial domain transmission filters in the spatial domain transmission filters supported by the first terminal device. For example, there are a total of X spatial domain transmission filters that can be used by the first terminal device, X is an integer and X≥1, then the above-mentioned different spatial domain transmission filters may be x different spatial domain transmission filters among the X spatial domain transmission filters, where x is a positive integer less than X.

[0087] It should be noted that the value of X may be determined according to pre-configuration information or network configuration information. Of course, in the embodiment of the present application, the value of X may also depend on the terminal implementation.

[0088] In some implementations, the beam failure indication information may be received based on a default spatial transmission filter (also referred to as a "second spatial transmission filter"), or in other words, the second terminal device receives the beam failure indication information based on the default spatial transmission filter, wherein the default spatial transmission filter may be network configured, preconfigured, predefined, or dependent on terminal implementation, which is not limited in this embodiment of the present application. Of course, in this embodiment of the present application, the above-mentioned beam failure indication information may be omnidirectionally received by the second terminal device.

[0089] For ease of understanding, the following text combines Figure 7 and takes the number of spatial transmission filters (also known as "transmission beams") supported by the first terminal device as 4 (ie, X=4) as an example to introduce the transmission method of the beam failure indication information in the embodiment of the present application. As shown in Figure 7, it is assumed that the transmission beams supported by the first terminal device include transmission beams 0 to 3, and transmission beams 0 to 3 can correspond to different beam directions. Accordingly, the transmission process of the beam failure indication information includes 4 sub-transmission processes, namely, sub-transmission processes 1 to 4.

[0090] During the time t1 corresponding to sub-transmission process 1, the first terminal device may transmit beam failure indication information by sending beam 0. During the time t2 corresponding to sub-transmission process 2, the first terminal device may transmit beam failure indication information by sending beam 1. During the time t3 corresponding to sub-transmission process 3, the first terminal device may transmit beam failure indication information by sending beam 2. During the time t4 corresponding to sub-transmission process 4, the first terminal device may transmit beam failure indication information by sending beam 3.

[0091] In transmission mode 2, beam failure indication information is transmitted based on one or more spatial transmission filters, and the one or more spatial transmission filters are also used to transmit sidelink data on the sidelink.

[0092] In an embodiment of the present application, the one or more spatial transmission filters may be replaced by K spatial transmission filters, where K is a positive integer greater than or equal to 1. Accordingly, the beam failure indication information may be transmitted based on the K spatial transmission filters, and the K spatial transmission filters are also used to transmit sidelink data on the sidelink. In other words, the beam failure indication information may be transmitted using one or more transmit beams used to transmit sidelink data.

[0093] In some implementations, K spatial transmission filters are determined from M spatial transmission filters used to transmit sideline data, where M is a positive integer greater than or equal to K.

[0094] It should be noted that the above-mentioned M spatial transmission filters can be the M transmission beams of the M beam pairs for side transmission selected by the first terminal device and the second terminal device through the beam selection process (or beam pairing process). Of course, the above-mentioned M spatial transmission filters can also be obtained by other methods, and the embodiment of the present application does not limit the method for obtaining the M spatial transmission filters.

[0095] When K=M=1, it means that the number of spatial domain transmission filters used to transmit side row data between the first terminal device and the second terminal device is 1. In this case, the spatial domain transmission filter can be used to transmit beam failure indication information. When K=M>1, it means that the number of spatial domain transmission filters used to transmit side row data between the first terminal device and the second terminal device is greater than 1. In this case, multiple spatial domain transmission filters used to transmit side row data can be used to transmit beam failure indication information. When 1<K<M, it means that the number of spatial domain transmission filters used to transmit side row data between the first terminal device and the second terminal device is greater than 1, and some spatial domain transmission filters (i.e., K spatial domain transmission filters) are selected from the multiple spatial domain transmission filters used to transmit side row data to transmit beam failure indication information.

[0096] In an embodiment of the present application, the K spatial domain transmission filters can be determined based on the communication quality corresponding to the M spatial domain transmission filters. For example, the K spatial domain transmission filters can be the K spatial domain transmission filters with the best communication quality among the M spatial domain transmission filters, or in other words, the communication quality corresponding to the K spatial domain transmission filters is higher than the communication quality corresponding to other spatial domain transmission filters among the M spatial domain transmission filters. Of course, in an embodiment of the present application, the K spatial domain transmission filters can be any K spatial domain transmission filters among the M spatial domain transmission filters.

[0097] In an embodiment of the present application, K spatial domain transmission filters are selected from M spatial domain transmission filters based on communication quality to transmit beam failure indication information, which helps to improve the communication quality of the transmission beam failure indication information.

[0098] In some implementations, the communication quality may be represented by signal quality and / or signal received power. Generally speaking, the higher the signal quality and / or the greater the signal received power, the better the communication quality. The signal quality may be, for example, RSRQ, and the signal received power may be, for example, RSRP, which is not limited in the embodiments of the present application.

[0099] In some implementations, the beam failure indication information may be received based on a spatial transmission filter (also referred to as a "third spatial transmission filter") corresponding to the spatial transmission filter used to transmit the beam failure indication information, or in other words, the second terminal device receives the beam failure indication information based on the third spatial transmission filter, wherein the third spatial transmission filter corresponds to the spatial transmission filter used to transmit the beam failure indication information. Of course, in an embodiment of the present application, the above-mentioned beam failure indication information may be omnidirectionally received by the second terminal device.

[0100] It should be noted that the above-mentioned third spatial transmission filter corresponds to the spatial transmission filter used to transmit beam failure indication information. It can be understood that the receiving beam used to receive the beam failure indication information corresponds to the transmitting beam used to transmit the beam failure indication information, that is, the beam direction of the receiving beam used to receive the beam failure indication information corresponds to the beam direction of the transmitting beam used to transmit the beam failure indication information, or, in other words, the receiving beam and the transmitting beam of the beam failure indication information belong to a beam pair.

[0101] For ease of understanding, the following text combines Figures 8 to 9 and takes M=1 or M>1 as an example to introduce the transmission method of beam failure indication information in an embodiment of the present application.

[0102] As shown in FIG8 , when M=1, there is only one beam pair 0 between the first terminal device and the second terminal device to transmit side data, where beam pair 0 includes transmit beam 0 and receive beam 0. At this time, the first terminal device can use transmit beam 0 to transmit beam failure indication information, and correspondingly, the second terminal device can use receive beam 0 to receive beam failure indication information.

[0103] As shown in FIG. 9 , when M=2 and K=2, there are two beam pairs between the first terminal device and the second terminal device to transmit side data, namely, beam pair 0 and beam pair 1. Accordingly, beam pair 0 and beam pair 1 can be used to transmit beam failure indication information. That is to say, the first terminal device can use transmit beam 0 in beam pair 0 to transmit beam failure indication information 1, and accordingly, the second terminal device can use receive beam 0 in beam pair 0 to receive beam failure indication information 1. In addition, the first terminal device can use transmit beam 1 in beam pair 1 to transmit beam failure indication information 2, and accordingly, the second terminal device can use receive beam 1 in beam pair 1 to receive beam failure indication information 2.

[0104] It should be noted that, in the embodiment of the present application, before transmitting the beam failure indication information, the first terminal device may inform the second terminal device of the transmission beam used to send the beam failure indication information, so that the second terminal device selects the corresponding receiving beam for receiving. Of course, if there is only one beam pair between the first terminal device and the second terminal, the first terminal device may not inform the second terminal device of the transmission beam used to send the beam failure indication information, and the first terminal device and the second terminal device may use the beam pair by default to transmit the beam failure indication information.

[0105] In transmission mode 3, beam failure indication information can be transmitted based on a default spatial transmission filter (also called a "first spatial transmission filter").

[0106] In the embodiment of the present application, the above default spatial transmission filter can be used to transmit other side data in addition to the beam failure indication information. Of course, in the embodiment of the present application, the above default spatial transmission filter can also be used only for transmitting the beam failure indication information.

[0107] In some implementations, the above-mentioned default spatial domain transmission filter may be configured by a network device through configuration information. In other implementations, the above-mentioned default spatial domain transmission filter may be determined by the first terminal device according to the configuration information. In other implementations, the above-mentioned default spatial domain transmission filter may be predefined by a communication protocol. In other implementations, the above-mentioned default spatial domain transmission filter may depend on the terminal implementation, which is not limited in the embodiments of the present application.

[0108] In some implementations, the beam failure indication information is received based on a default spatial transmission filter (also referred to as a "second spatial transmission filter"), that is, the second terminal device may use the default spatial transmission filter to receive the beam failure indication information. Of course, in an embodiment of the present application, the above-mentioned beam failure indication information may be omnidirectionally received by the second terminal device, wherein the wide beam may be, for example, the beam shown in FIG. 4.

[0109] In some implementations, the second spatial domain transmission filter may be configured by a network device through configuration information. In other implementations, the second spatial domain transmission filter may be determined by a second terminal device according to configuration information. In other implementations, the second spatial domain transmission filter may be predefined by a communication protocol. In other implementations, the second spatial domain transmission filter may depend on the terminal implementation, which is not limited in the embodiments of the present application.

[0110] The above text introduces the spatial transmission filter corresponding to the beam failure indication information in combination with transmission modes 1 to 3. The following text introduces the carrying method of the beam failure indication information in the embodiment of the present application. It should be noted that the carrying method introduced below can be used in combination with transmission modes 1 to 3 introduced above, or it can be used alone, and the embodiment of the present application does not limit this.

[0111] In some implementations, the beam failure indication information is carried in the first signaling. For example, the first signaling may include an indication field for carrying the beam failure indication information. The indication field may carry the beam failure indication information by 1 bit. When the value of the indication field is 1, the beam failure indication information may indicate that a beam failure has occurred. On the contrary, when the value of the indication field is 0, the beam failure indication information may indicate that no beam failure has occurred. Of course, in an embodiment of the present application, when the value of the indication field is 0, the beam failure indication information may indicate that a beam failure has occurred. On the contrary, when the value of the indication field is 1, the beam failure indication information may indicate that no beam failure has occurred.

[0112] It should be noted that, in the embodiment of the present application, the indication field may represent the beam failure indication information through multiple bits, and the embodiment of the present application is not limited to this. For example, the indication field may represent the beam failure indication information through 2 bits, and when the value of the 2 bits in the indication field is 00, the beam failure indication information may indicate that a beam failure has occurred, and when the value of the 2 bits in the indication field is not 00, the beam failure indication information may indicate that no beam failure has occurred.

[0113] In the embodiment of the present application, the first signaling may be an SCI. Of course, the first signaling may also be a medium access control element (MAC CE). The embodiment of the present application does not specifically limit the first signaling.

[0114] Taking the first signaling as SCI as an example, in some implementations, the PSSCH associated with the SCI is not used to carry valid sidelink data. For example, redundant bits can be filled in the PSSCH.

[0115] Taking the first signaling as SCI as an example, in some implementations, the sidewalk priority indicated by the indication field for indicating the sidewalk priority contained in the SCI is the highest priority among the preset sidewalk priorities, which helps to preferentially transmit the SCI carrying the beam failure indication information. Of course, in the embodiment of the present application, the sidewalk priority corresponding to the above SCI may also be other priorities among the preset sidewalk priorities except the highest priority, for example, the lowest priority, which is not limited in the embodiment of the present application.

[0116] Taking the first signaling as MAC CE as an example, in some implementations, the sidewalk priority corresponding to the MAC CE is the highest priority among the preset sidewalk priorities, which helps to preferentially transmit the MAC CE carrying the beam failure indication information. Of course, in the embodiment of the present application, the sidewalk priority corresponding to the MAC CE can also be determined based on the configuration information sent by the network device or based on the pre-configuration information, and the embodiment of the present application does not limit this.

[0117] Taking the first signaling as MAC CE as an example, in some implementations, MAC CE can be transmitted independently. Of course, in the embodiment of the present application, the above MAC CE can also be transmitted simultaneously with other sidelink data, and the embodiment of the present application does not limit this.

[0118] In the embodiment of the present application, there is no limitation on the method for obtaining the sideline transmission resource (also referred to as "first sideline transmission resource") used to transmit beam failure indication information. In some implementations, the first sideline transmission resource may be configured by a network device. For example, in the first mode described above, the network device may allocate the first sideline transmission resource to the first terminal device. In other implementations, the first sideline transmission resource may be determined by the first terminal device. For example, in the second mode described above, the first terminal device may autonomously determine the first sideline transmission resource in the resource pool.

[0119] The first sidelink transmission resource may include one or more sidelink transmission resources. When the first sidelink transmission resource includes multiple sidelink transmission resources, the multiple sidelink transmission resources may be continuous or discontinuous in the time domain, which is not limited in the embodiment of the present application.

[0120] In addition, in an embodiment of the present application, when beam failure indication information is transmitted on multiple side transmission resources, the beam failure indication information transmitted on different side resources may correspond to different spatial transmission filters. For example, the bearing method based on multiple side transmission resources is combined with transmission method 1, then the side transmission resources used in multiple sub-transmission processes may be the above-mentioned multiple side transmission resources, and correspondingly, different spatial transmission filters may be used in multiple sub-transmission processes. Of course, in an embodiment of the present application, when beam failure indication information is transmitted on multiple side transmission resources, the beam failure indication information transmitted on different side resources may correspond to the same spatial transmission filter. For example, the bearing method based on multiple side transmission resources is combined with transmission method 3, and correspondingly, beam failure indication information may be transmitted on multiple side transmission resources respectively based on the first spatial transmission filter.

[0121] In some implementations, the first side transmission resource may be within a first time range. For ease of understanding, the first time range is introduced below with reference to FIG7 using transmission mode 1 as an example. Continuing to refer to FIG7, time t1, time t2, time t3, and time t4 corresponding to the four sub-transmission processes may be within the first time range.

[0122] In some implementations, the first time range is determined based on one or more of: the time for triggering the first terminal device to transmit beam failure indication information; a first parameter for determining the start time of the first time range; a second parameter for determining the end time of the first time range; and a third parameter for determining the duration of the first time range.

[0123] Taking the first time range determined based on the time of triggering the first terminal device to transmit beam failure indication information as an example, in some implementations, the start time of the first time range can be determined based on the time of the transmission beam failure indication information. Of course, in an embodiment of the present application, the end time of the first time range can be determined based on the time of the transmission beam failure indication information, or a certain moment in the first time range (for example, the middle moment of the first time range) can be determined based on the time of the transmission beam failure indication information.

[0124] The time when the first terminal device transmits the beam failure indication information can be determined by the time slot for transmitting the beam failure indication information. For example, the time when the first terminal device transmits the beam failure indication information can be determined based on the time domain starting position of the time slot for transmitting the beam failure indication information. For another example, the time when the first terminal device transmits the beam failure indication information can be determined based on the time domain ending position of the time slot for transmitting the beam failure indication information.

[0125] For example, the time for transmitting the beam failure indication information is time slot n, and accordingly, the starting position of the first time range can be expressed as the time domain starting position of time slot n.

[0126] For another example, the time for transmitting the beam failure indication information is time slot n, and accordingly, the end position of the first time range can be expressed as the time domain end position of time slot n.

[0127] Taking the first time range determined based on the first parameter as an example, in some implementations, the setting of the first parameter may be related to the processing time required for the first terminal device to prepare for the transmission of the beam failure indication information. Of course, in the embodiment of the present application, the above-mentioned first parameter may also be configured by the network device or predefined by the protocol.

[0128] In the embodiment of the present application, the time unit of the first parameter is not limited. The time unit of the first parameter can be, for example, a symbol, a time slot, a millisecond, a microsecond, etc.

[0129] For example, the time for transmitting beam failure indication information is time slot n, and the first parameter is represented by T1. Accordingly, the starting position of the first time range can be represented by n+T1, where T1 is a positive integer greater than or equal to 0.

[0130] Taking the first time range determined based on the second parameter as an example, in some implementations, the setting of the second parameter may be related to the processing time required for the first terminal device to prepare for the transmission of the beam failure indication information. Of course, in the embodiment of the present application, the above second parameter may also be configured by the network device or predefined by the protocol.

[0131] In the embodiment of the present application, the time unit of the second parameter is not limited. The time unit of the second parameter can be, for example, a symbol, a time slot, a millisecond, a microsecond, etc.

[0132] For example, the time for transmitting beam failure indication information is time slot n, the second parameter is represented as T2, and accordingly, the starting position of the first time range can be represented as n+T2, where T2 is a positive integer greater than or equal to 0.

[0133] Taking the first time range determined based on the third parameter as an example, in an embodiment of the present application, the third parameter can be configured by the network device through configuration information. Of course, the third parameter can also be pre-configured or pre-defined by the protocol.

[0134] In the embodiment of the present application, the time unit of the third parameter is not limited. The time unit of the third parameter can be, for example, a symbol, a time slot, a millisecond, a microsecond, etc.

[0135] For example, the starting time of the first time range is time slot m, and the third parameter is represented as T3. Accordingly, the first time range can be represented as a period of time with time slot m as the starting time and a time length of T3, where T3 is a positive integer greater than or equal to 0.

[0136] In some implementations, the parameters for determining the first time range (e.g., one or more of the first parameter, the second parameter, and the third parameter) may be associated with the subcarrier spacing of the sidelink. Of course, in the embodiment of the present application, the parameters for determining the first time range may also be fixed values.

[0137] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 9, and the device embodiment of the present application is described in detail below in conjunction with Figures 10 to 12. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment, so the part not described in detail can refer to the previous method embodiment.

[0138] Fig. 10 is a schematic diagram of a terminal device according to an embodiment of the present application. The terminal device 1000 shown in Fig. 10 is a first terminal device. The terminal device 1000 includes: a processing unit 1010.

[0139] The processing unit 810 is used to transmit beam failure indication information to the second terminal device via the side link.

[0140] In a possible implementation manner, the transmission process of the beam failure indication information includes multiple sub-transmission processes, and the multiple sub-transmission processes transmit the beam failure indication information based on different spatial domain transmission filters.

[0141] In a possible implementation, the beam failure indication information is transmitted based on K spatial domain transmission filters, and the K spatial domain transmission filters are also used to transmit sidelink data on the sidelink, and K is a positive integer greater than or equal to 1.

[0142] In a possible implementation manner, the K spatial domain transmission filters are determined from M spatial domain transmission filters used to transmit the sideline data, where M is a positive integer greater than or equal to K.

[0143] In a possible implementation manner, the K spatial domain transmission filters are determined based on signal qualities corresponding to the M spatial domain transmission filters.

[0144] In a possible implementation manner, the beam failure indication information is transmitted based on a first spatial domain transmission filter, and the first spatial domain transmission filter is a default spatial domain transmission filter.

[0145] In a possible implementation, the beam failure indication information is received by the second terminal device based on a second spatial domain transmission filter, where the second spatial domain transmission filter is a default spatial domain transmission filter.

[0146] In a possible implementation, the beam failure indication information is received by the second terminal device based on a third spatial domain transmission filter, and the third spatial domain transmission filter corresponds to the spatial domain transmission filter used to transmit the beam failure indication information.

[0147] In a possible implementation manner, the beam failure indication information is carried in the first signaling.

[0148] In a possible implementation manner, the first signaling is sidelink control information SCI or media access control element MAC CE.

[0149] In one possible implementation, the first signaling is SCI, and the SCI satisfies one or more of the following: the physical sidelink shared channel PSSCH associated with the SCI is not used to carry valid sidelink data; and the sidelink priority indicated by the indication field for indicating the sidelink priority included in the SCI is the highest priority among the preset sidelink priorities.

[0150] In a possible implementation, the first signaling is a MAC CE, and the MAC CE satisfies one or more of the following: the sidewalk priority corresponding to the MAC CE is the highest priority among preset sidewalk priorities; and the MAC CE is transmitted independently or simultaneously with other sidewalk data.

[0151] In a possible implementation manner, the first signaling includes an indication field for carrying the beam failure indication information.

[0152] In a possible implementation, the beam failure indication information is carried by a first sideline transmission resource, and the first sideline transmission resource is configured by a network device or determined by the first terminal device.

[0153] In one possible implementation, the first sideline transmission resource is located within a first time range, and the first time range is determined based on one or more of: the time for triggering the first terminal device to transmit the beam failure indication information; a first parameter for determining the start time of the first time range; a second parameter for determining the end time of the first time range; and a third parameter for determining the duration of the first time range.

[0154] In a possible implementation, a parameter for determining the first time range is associated with a subcarrier spacing of the sidelink.

[0155] In a possible implementation manner, the beam failure indication information is transmitted based on unicast or broadcast.

[0156] FIG. 11 is a schematic diagram of a terminal device according to another embodiment of the present application. The terminal device 1100 shown in FIG. 11 is a second terminal device. The terminal device 1100 includes a processing unit 1110 .

[0157] The processing unit 1110 is used to receive beam failure indication information transmitted by the first terminal device through the side link.

[0158] In a possible implementation manner, the transmission process of the beam failure indication information includes multiple sub-transmission processes, and the multiple sub-transmission processes transmit the beam failure indication information based on different spatial domain transmission filters.

[0159] In a possible implementation, the beam failure indication information is transmitted based on K spatial domain transmission filters, and the K spatial domain transmission filters are also used to transmit sidelink data on the sidelink, and K is a positive integer greater than or equal to 1.

[0160] In a possible implementation manner, the K spatial domain transmission filters are determined from M spatial domain transmission filters used to transmit the sideline data, where M is a positive integer greater than or equal to K.

[0161] In a possible implementation manner, the K spatial domain transmission filters are determined based on signal qualities corresponding to the M spatial domain transmission filters.

[0162] In a possible implementation manner, the beam failure indication information is transmitted based on a first spatial domain transmission filter, and the first spatial domain transmission filter is a default spatial domain transmission filter.

[0163] In a possible implementation, the beam failure indication information is received by the second terminal device based on a second spatial domain transmission filter, where the second spatial domain transmission filter is a default spatial domain transmission filter.

[0164] In a possible implementation, the beam failure indication information is received by the second terminal device based on a third spatial domain transmission filter, and the third spatial domain transmission filter corresponds to the spatial domain transmission filter used to transmit the beam failure indication information.

[0165] In a possible implementation manner, the beam failure indication information is carried in the first signaling.

[0166] In a possible implementation manner, the first signaling is sidelink control information SCI or media access control element MAC CE.

[0167] In one possible implementation, the first signaling is SCI, and the SCI satisfies one or more of the following: the physical sidelink shared channel PSSCH associated with the SCI is not used to carry valid sidelink data; and the sidelink priority indicated by the indication field for indicating the sidelink priority included in the SCI is the highest priority among the preset sidelink priorities.

[0168] In a possible implementation, the first signaling is a MAC CE, and the MAC CE satisfies one or more of the following: the sidewalk priority corresponding to the MAC CE is the highest priority among preset sidewalk priorities; and the MAC CE is transmitted independently or simultaneously with other sidewalk data.

[0169] In a possible implementation manner, the first signaling includes an indication field for carrying the beam failure indication information.

[0170] In a possible implementation, the beam failure indication information is carried by a first sideline transmission resource, and the first sideline transmission resource is configured by a network device or determined by the first terminal device.

[0171] In one possible implementation, the first sideline transmission resource is located within a first time range, and the first time range is determined based on one or more of: the time for triggering the first terminal device to transmit the beam failure indication information; a first parameter for determining the start time of the first time range; a second parameter for determining the end time of the first time range; and a third parameter for determining the duration of the first time range.

[0172] In a possible implementation, a parameter for determining the first time range is associated with a subcarrier spacing of the sidelink.

[0173] In a possible implementation manner, the beam failure indication information is transmitted based on unicast or broadcast.

[0174] FIG12 is a schematic structural diagram of a device according to an embodiment of the present application. The dotted lines in FIG12 indicate that the unit or module is optional. The device 1200 may be used to implement the method described in the above method embodiment. The device 1200 may be a chip or a terminal device.

[0175] The device 1200 may include one or more processors 1210. The processor 1210 may support the device 1200 to implement the method described in the above method embodiment. The processor 1210 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0176] The apparatus 1200 may further include one or more memories 1220. The memory 1220 stores a program, which can be executed by the processor 1210, so that the processor 1210 executes the method described in the above method embodiment. The memory 1220 may be independent of the processor 1210 or integrated in the processor 1210.

[0177] The apparatus 1200 may further include a transceiver 1230. The processor 1210 may communicate with other devices or chips through the transceiver 1230. For example, the processor 1210 may transmit and receive data with other devices or chips through the transceiver 1230.

[0178] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to the terminal device provided in the present application, and the program enables the computer to execute the method executed by the terminal device in each embodiment of the present application.

[0179] The embodiment of the present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal device provided in the embodiment of the present application, and the program enables the computer to execute the method executed by the terminal device in each embodiment of the present application.

[0180] The embodiment of the present application also provides a computer program. The computer program can be applied to the terminal device provided in the embodiment of the present application, and the computer program enables a computer to execute the method executed by the terminal device in each embodiment of the present application.

[0181] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The terms "first", "second", "third" and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions.

[0182] In the embodiments of the present application, the "indication" mentioned 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.

[0183] In the embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0184] In the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship of indication and being indicated, configuration and being configured, etc.

[0185] In the embodiments of the present application, "pre-definition" or "pre-configuration" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, pre-definition can refer to what is defined in the protocol.

[0186] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0187] In the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. 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 article generally indicates that the associated objects before and after are in an "or" relationship.

[0188] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean 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.

[0189] In the several embodiments provided in the present 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 only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, 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.

[0190] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0191] 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.

[0192] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0193] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A side transmission method, characterized in that: include: The first terminal device transmits beam failure indication information to the second terminal device via a side link. The method according to claim 1, characterized in that The transmission process of the beam failure indication information includes multiple sub-transmission processes, and the multiple sub-transmission processes transmit the beam failure indication information based on different spatial domain transmission filters. The method according to claim 1 or 2, characterized in that The beam failure indication information is transmitted based on K spatial domain transmission filters, and the K spatial domain transmission filters are also used to transmit sidelink data on the sidelink, where K is a positive integer greater than or equal to 1. The method according to claim 3, characterized in that The K spatial domain transmission filters are determined from M spatial domain transmission filters used to transmit the sideline data, where M is a positive integer greater than or equal to K. The method according to claim 4, characterized in that The K spatial domain transmission filters are determined based on signal qualities corresponding to the M spatial domain transmission filters. The method according to claim 1, characterized in that The beam failure indication information is transmitted based on a first spatial domain transmission filter, where the first spatial domain transmission filter is a default spatial domain transmission filter. The method according to any one of claims 1 to 6, characterized in that The beam failure indication information is received by the second terminal device based on a second spatial domain transmission filter, where the second spatial domain transmission filter is a default spatial domain transmission filter. The method according to any one of claims 1 to 6, characterized in that The beam failure indication information is received by the second terminal device based on a third spatial domain transmission filter, and the third spatial domain transmission filter corresponds to the spatial domain transmission filter used to transmit the beam failure indication information. The method according to any one of claims 1 to 8, characterized in that The beam failure indication information is carried in the first signaling. The method according to claim 9, characterized in that The first signaling is sidelink control information SCI or media access control element MAC CE. The method according to claim 10, characterized in that The first signaling is SCI, and the SCI satisfies one or more of the following: the physical sidelink shared channel PSSCH associated with the SCI is not used to carry valid sidelink data; and the sidelink priority indicated by the indication field for indicating the sidelink priority included in the SCI is the highest priority among the preset sidelink priorities. The method according to claim 10, characterized in that The first signaling is a MAC CE, and the MAC CE satisfies one or more of the following: the sidewalk priority corresponding to the MAC CE is the highest priority among preset sidewalk priorities; and the MAC CE is transmitted independently or simultaneously with other sidewalk data. The method according to any one of claims 9 to 12, characterized in that The first signaling includes an indication field for carrying the beam failure indication information. The method according to any one of claims 1 to 13, characterized in that The beam failure indication information is carried by a first sideline transmission resource, and the first sideline transmission resource is configured by a network device or determined by the first terminal device. The method according to claim 14, characterized in that The first sideline transmission resource is located within a first time range, and the first time range is determined based on one or more of: the time for triggering the first terminal device to transmit the beam failure indication information; a first parameter for determining the start time of the first time range; a second parameter for determining the end time of the first time range; a third parameter for determining the duration of the first time range. The method according to claim 15, characterized in that The parameter used to determine the first time range is associated with the subcarrier spacing of the sidelink. The method according to any one of claims 1 to 16, characterized in that The beam failure indication information is transmitted based on unicast or broadcast. A side transmission method, characterized in that: include: The second terminal device receives the beam failure indication information transmitted by the first terminal device via the side link. The method according to claim 18, characterized in that The transmission process of the beam failure indication information includes multiple sub-transmission processes, and the multiple sub-transmission processes transmit the beam failure indication information based on different spatial domain transmission filters. The method according to claim 18 or 19, characterized in that The beam failure indication information is transmitted based on K spatial domain transmission filters, and the K spatial domain transmission filters are also used to transmit sidelink data on the sidelink, where K is a positive integer greater than or equal to 1. The method according to claim 20, characterized in that The K spatial domain transmission filters are determined from M spatial domain transmission filters used to transmit the sideline data, where M is a positive integer greater than or equal to K. The method according to claim 21, characterized in that The K spatial domain transmission filters are determined based on signal qualities corresponding to the M spatial domain transmission filters. The method according to claim 18, characterized in that The beam failure indication information is transmitted based on a first spatial domain transmission filter, where the first spatial domain transmission filter is a default spatial domain transmission filter. The method according to any one of claims 18 to 23, characterized in that The beam failure indication information is received by the second terminal device based on a second spatial domain transmission filter, where the second spatial domain transmission filter is a default spatial domain transmission filter. The method according to any one of claims 18 to 23, characterized in that The beam failure indication information is received by the second terminal device based on a third spatial domain transmission filter, and the third spatial domain transmission filter corresponds to the spatial domain transmission filter used to transmit the beam failure indication information. The method according to any one of claims 18 to 25, characterized in that The beam failure indication information is carried in the first signaling. The method according to claim 26, characterized in that The first signaling is sidelink control information SCI or media access control element MAC CE. The method according to claim 27, characterized in that The first signaling is SCI, and the SCI satisfies one or more of the following: the physical sidelink shared channel PSSCH associated with the SCI is not used to carry valid sidelink data; and the sidelink priority indicated by the indication field for indicating the sidelink priority included in the SCI is the highest priority among the preset sidelink priorities. The method according to claim 27, characterized in that The first signaling is a MAC CE, and the MAC CE satisfies one or more of the following: the sidewalk priority corresponding to the MAC CE is the highest priority among preset sidewalk priorities; and the MAC CE is transmitted independently or simultaneously with other sidewalk data. The method according to any one of claims 26 to 29, characterized in that The first signaling includes an indication field for carrying the beam failure indication information. The method according to any one of claims 18 to 30, characterized in that The beam failure indication information is carried by a first sideline transmission resource, and the first sideline transmission resource is configured by a network device or determined by the first terminal device. The method according to claim 31, characterized in that The first sideline transmission resource is located within a first time range, and the first time range is determined based on one or more of: the time for triggering the first terminal device to transmit the beam failure indication information; a first parameter for determining the start time of the first time range; a second parameter for determining the end time of the first time range; a third parameter for determining the duration of the first time range. The method according to claim 32, characterized in that The parameter used to determine the first time range is associated with the subcarrier spacing of the sidelink. The method according to any one of claims 18 to 33, characterized in that The beam failure indication information is transmitted based on unicast or broadcast. A terminal device, characterized in that: The terminal device is a first terminal device, and includes: a processing unit, configured to transmit beam failure indication information to a second terminal device via a side link. The terminal device according to claim 35, characterized in that The transmission process of the beam failure indication information includes multiple sub-transmission processes, and the multiple sub-transmission processes transmit the beam failure indication information based on different spatial domain transmission filters. The terminal device according to claim 35 or 36, characterized in that: The beam failure indication information is transmitted based on K spatial domain transmission filters, and the K spatial domain transmission filters are also used to transmit sidelink data on the sidelink, where K is a positive integer greater than or equal to 1. The terminal device according to claim 37, characterized in that The K spatial domain transmission filters are determined from M spatial domain transmission filters used to transmit the sideline data, where M is a positive integer greater than or equal to K. The terminal device according to claim 38, characterized in that The K spatial domain transmission filters are determined based on signal qualities corresponding to the M spatial domain transmission filters. The terminal device according to claim 35, characterized in that The beam failure indication information is transmitted based on a first spatial domain transmission filter, where the first spatial domain transmission filter is a default spatial domain transmission filter. The terminal device according to any one of claims 35 to 40, characterized in that: The beam failure indication information is received by the second terminal device based on a second spatial domain transmission filter, where the second spatial domain transmission filter is a default spatial domain transmission filter. The terminal device according to any one of claims 35 to 40, characterized in that: The beam failure indication information is received by the second terminal device based on a third spatial domain transmission filter, and the third spatial domain transmission filter corresponds to the spatial domain transmission filter used to transmit the beam failure indication information. The terminal device according to any one of claims 35 to 42, characterized in that: The beam failure indication information is carried in the first signaling. The terminal device according to claim 43, characterized in that The first signaling is sidelink control information SCI or media access control element MAC CE. The terminal device according to claim 44, characterized in that The first signaling is SCI, and the SCI satisfies one or more of the following: the physical sidelink shared channel PSSCH associated with the SCI is not used to carry valid sidelink data; and the sidelink priority indicated by the indication field for indicating the sidelink priority included in the SCI is the highest priority among the preset sidelink priorities. The terminal device according to claim 44, characterized in that The first signaling is a MAC CE, and the MAC CE satisfies one or more of the following: the sidewalk priority corresponding to the MAC CE is the highest priority among preset sidewalk priorities; and the MAC CE is transmitted independently or simultaneously with other sidewalk data. The terminal device according to any one of claims 43 to 46, characterized in that: The first signaling includes an indication field for carrying the beam failure indication information. The terminal device according to any one of claims 35 to 47, characterized in that: The beam failure indication information is carried by a first sideline transmission resource, and the first sideline transmission resource is configured by a network device or determined by the first terminal device. The terminal device according to claim 48, characterized in that The first sideline transmission resource is located within a first time range, and the first time range is determined based on one or more of: the time for triggering the first terminal device to transmit the beam failure indication information; a first parameter for determining the start time of the first time range; a second parameter for determining the end time of the first time range; a third parameter for determining the duration of the first time range. The terminal device according to claim 49, characterized in that The parameter used to determine the first time range is associated with the subcarrier spacing of the sidelink. The terminal device according to any one of claims 35 to 50, characterized in that: The beam failure indication information is transmitted based on unicast or broadcast. A terminal device, characterized in that: The terminal device is a second terminal device, and includes: a processing unit, configured to receive beam failure indication information transmitted by the first terminal device via a side link. The terminal device according to claim 52, characterized in that The transmission process of the beam failure indication information includes multiple sub-transmission processes, and the multiple sub-transmission processes transmit the beam failure indication information based on different spatial domain transmission filters. The terminal device according to claim 52 or 53, characterized in that: The beam failure indication information is transmitted based on K spatial domain transmission filters, and the K spatial domain transmission filters are also used to transmit sidelink data on the sidelink, where K is a positive integer greater than or equal to 1. The terminal device according to claim 54, characterized in that The K spatial domain transmission filters are determined from M spatial domain transmission filters used to transmit the sideline data, where M is a positive integer greater than or equal to K. The terminal device according to claim 55, characterized in that The K spatial domain transmission filters are determined based on signal qualities corresponding to the M spatial domain transmission filters. The terminal device according to claim 52, characterized in that The beam failure indication information is transmitted based on a first spatial domain transmission filter, where the first spatial domain transmission filter is a default spatial domain transmission filter. The terminal device according to any one of claims 52-57, characterized in that: The beam failure indication information is received by the second terminal device based on a second spatial domain transmission filter, where the second spatial domain transmission filter is a default spatial domain transmission filter. The terminal device according to any one of claims 52-57, characterized in that: The beam failure indication information is received by the second terminal device based on a third spatial domain transmission filter, and the third spatial domain transmission filter corresponds to the spatial domain transmission filter used to transmit the beam failure indication information. The terminal device according to any one of claims 52 to 59, characterized in that: The beam failure indication information is carried in the first signaling. The terminal device according to claim 60, characterized in that The first signaling is sidelink control information SCI or media access control element MAC CE. The terminal device according to claim 61, characterized in that The first signaling is SCI, and the SCI satisfies one or more of the following: the physical sidelink shared channel PSSCH associated with the SCI is not used to carry valid sidelink data; and the sidelink priority indicated by the indication field for indicating the sidelink priority included in the SCI is the highest priority among the preset sidelink priorities. The terminal device according to claim 61, characterized in that The first signaling is a MAC CE, and the MAC CE satisfies one or more of the following: the sidewalk priority corresponding to the MAC CE is the highest priority among preset sidewalk priorities; and the MAC CE is transmitted independently or simultaneously with other sidewalk data. The terminal device according to any one of claims 60-63, characterized in that: The first signaling includes an indication field for carrying the beam failure indication information. The terminal device according to any one of claims 52 to 64, characterized in that: The beam failure indication information is carried by a first sideline transmission resource, and the first sideline transmission resource is configured by a network device or determined by the first terminal device. The terminal device according to claim 65, characterized in that The first sideline transmission resource is located within a first time range, and the first time range is determined based on one or more of: the time for triggering the first terminal device to transmit the beam failure indication information; a first parameter for determining the start time of the first time range; a second parameter for determining the end time of the first time range; a third parameter for determining the duration of the first time range. The terminal device according to claim 66, characterized in that The parameter used to determine the first time range is associated with the subcarrier spacing of the sidelink. The terminal device according to any one of claims 52 to 67, characterized in that: The beam failure indication information is transmitted based on unicast or broadcast. A terminal device, characterized in that: It comprises a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal executes the method as described in any one of claims 1-34. A device, characterized in that The device comprises a processor, configured to call a program from a memory so as to cause the device to execute a method as claimed in any one of claims 1 to 34. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 34. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 34. A computer program product, characterized in that The method comprises a program which causes a computer to execute the method according to any one of claims 1 to 34. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 34.

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