Beam information feedback method and device

Abstract

The embodiment of the invention provides a beam information feedback method and device, and relates to the technical field of sidelink beam management and the like, and the method comprises the steps that a first terminal sends a reference signal and related information used for initial beam pairing, the related information is used for indicating a second terminal to send beam information corresponding to the reference signal to the first terminal, and the second terminal is matched with the related information. The beam information feedback method and device provided by the embodiment of the invention are used for reducing the quantity of beam information received by the first terminal and reducing the difficulty of determining the optimal beam or the optimal beam by the first terminal.

Description

Technical Field

[0001] Embodiments of the present application relate to technical fields such as sidelink beam management, and in particular, to a method and device for feedback of beam information. Background Art

[0002] In beam management for 5G sidelink high-frequency communication, it is supported that terminals first perform initial beam pairing to obtain good beams or optimal beams, and then establish unicast connections based on this set of optimal beams.

[0003] In related technologies, during the initial beam pairing process, the transmitting terminal broadcasts a reference signal for initial beam pairing, and all receiving terminals that can receive this reference signal send beam information to the transmitting end based on the reference signal. The transmitting terminal determines good beams or optimal beams based on the received beam information.

[0004] In the above process, the number of receiving terminals that can receive this reference signal is large, resulting in a large amount of beam information received by the transmitting terminal, and thus making it difficult for the transmitting terminal to determine good beams or optimal beams. Summary of the Invention

[0005] Embodiments of the present application provide a method and device for feedback of beam information, which are used to reduce the amount of beam information received by a first terminal and reduce the difficulty for the first terminal to determine good beams or optimal beams.

[0006] In a first aspect, an embodiment of the present application provides a method for feedback of beam information, which is applied to a first terminal. The method includes:

[0007] Sending a reference signal for initial beam pairing and related information, where the related information is used to instruct a second terminal to send beam information corresponding to the reference signal to the first terminal, and the second terminal matches the related information.

[0008] In some embodiments, the related information includes one or more of the following:

[0009] Source terminal information of the first terminal;

[0010] Vehicle-to-Everything V2X service identifier;

[0011] Target terminal information of the second terminal.

[0012] In some embodiments, the source terminal information and the target terminal information respectively include one or more of the following:

[0013] Application layer identifier;

[0014] Physical layer identifier.

[0015] In some embodiments, the relevant information includes the source terminal information and / or the V2X service identifier; sending the relevant information for initial beam pairing includes:

[0016] Omnidirectionally sending the relevant information for initial beam pairing.

[0017] In some embodiments, the reference signal is a channel state information reference signal CSI-RS or a sidelink synchronization signal block S-SSB.

[0018] In some embodiments, the relevant information is carried by any of the following:

[0019] The reference signal;

[0020] The physical sidelink control channel PSCCH corresponding to the reference signal;

[0021] The physical sidelink feedback channel PSFCH corresponding to the reference signal;

[0022] The physical sidelink shared channel PSSCH corresponding to the reference signal.

[0023] In some embodiments, the beam information includes a first indication for indicating that the beam used for the reference signal is a recommended beam or an optimal beam.

[0024] In some embodiments, the method further includes:

[0025] Determining the time-frequency resources corresponding to the subchannel used for the reference signal;

[0026] Receiving the beam information sent by the second terminal device on the time-frequency resources.

[0027] In some embodiments, the subchannel used for the reference signal is a configured resource or a preconfigured resource; determining the time-frequency resources corresponding to the subchannel used for the reference signal includes:

[0028] Determining a first PRB subset of the PSFCH associated with the subchannel used for the reference signal within the set of physical resource blocks PRBs available for the PSFCH used for sending the beam information;

[0029] Determining the time-frequency resources corresponding to the subchannel according to the first PRB subset.

[0030] In some embodiments, the time-frequency resources corresponding to the subchannel are indicated by a first index of the resources transmitted by the PSFCH associated with the subchannel;

[0031] Determining the time-frequency resources corresponding to the subchannel according to the first PRB subset includes:

[0032] Determine the total amount of resources corresponding to the first PRB subset according to at least the total number of cyclic shift pairs and the total number of PRBs in the PRB set.

[0033] Determine a first index of the resources for the PSFCH transmission associated with the subchannel according to the source terminal information of the first terminal and the total amount of resources.

[0034] In some embodiments, the determining a first index of the resources for the PSFCH transmission associated with the subchannel according to the source terminal information of the first terminal and the total amount of resources includes:

[0035] Determine the remainder after dividing the source terminal information of the first terminal by the total amount of resources as the first index of the resources for the PSFCH transmission associated with the subchannel.

[0036] In some embodiments, the determining a first index of the resources for the PSFCH transmission associated with the subchannel according to the source terminal information of the first terminal and the total amount of resources includes:

[0037] Divide the total amount of resources by the total number of at least one beam direction, where the at least one beam direction is the beam direction for transmitting the reference signal, and the total number of the at least one beam direction is the number configured or pre-configured by the network device, to obtain a first quantity;

[0038] Divide the first PRB subset according to the first quantity to obtain a second PRB subset corresponding to each beam direction in the at least one beam direction;

[0039] Determine the remainder after dividing the source terminal information of the first terminal by the number of PRBs in the second PRB subset as the first index of the resources for the PSFCH transmission associated with the subchannel.

[0040] In some embodiments, the PRB set is a PRB set configured by a higher layer parameter in a resource pool.

[0041] In a second aspect, an embodiment of the present application provides a method for feedback of beam information, which is applied to a second terminal, and the method includes:

[0042] Receive a reference signal and related information for initial beam pairing;

[0043] When determining to send the beam information corresponding to the reference signal to the first terminal according to the related information, send the beam information corresponding to the reference signal to the first terminal.

[0044] In some embodiments, the related information includes one or more of the following:

[0045] Source terminal information, which is used to indicate the first terminal;

[0046] Vehicle-to-Everything (V2X) service identifier;

[0047] Destination terminal information, which is used to indicate the second terminal.

[0048] In some embodiments, the source terminal information and the destination terminal information respectively include one or more of the following:

[0049] Application layer identifier;

[0050] Physical layer identifier.

[0051] In some embodiments, determining the beam information corresponding to the reference signal to be sent to the first terminal according to the relevant information includes:

[0052] When the relevant information includes the source terminal information and the source terminal information indicates that the first terminal has not established a unicast connection with the second terminal, determining the beam information corresponding to the reference signal to be sent to the first terminal;

[0053] Or,

[0054] When the relevant information includes the V2X service identifier and the service indicated by the V2X service identifier is the service of the second terminal, determining the beam information corresponding to the reference signal to be sent to the first terminal;

[0055] Or,

[0056] When the relevant information includes the destination terminal information, determining the beam information corresponding to the reference signal to be sent to the first terminal.

[0057] In some embodiments, the reference signal is a Channel State Information Reference Signal (CSI-RS) or a Sidelink Synchronization Signal Block (S-SSB).

[0058] In some embodiments, the relevant information is carried by any one of the following:

[0059] The reference signal;

[0060] The Physical Sidelink Control Channel (PSCCH) corresponding to the reference signal;

[0061] The Physical Sidelink Feedback Channel (PSFCH) corresponding to the reference signal;

[0062] The Physical Sidelink Shared Channel (PSSCH) corresponding to the reference signal.

[0063] In some embodiments, sending the beam information corresponding to the reference signal to the first terminal includes:

[0064] Determine the time-frequency resources corresponding to the sub-channel used by the reference signal;

[0065] Send the beam information corresponding to the reference signal to the first terminal on the time-frequency resources.

[0066] In some embodiments, the sub-channel used by the reference signal is a configured resource or a pre-configured resource; determining the time-frequency resources corresponding to the sub-channel used by the reference signal includes:

[0067] Determine a first PRB subset of the PSFCH associated with the sub-channel used by the reference signal within the set of physical resource blocks PRBs available for the PSFCH for sending the beam information;

[0068] Determine the time-frequency resources corresponding to the sub-channel according to the first PRB subset.

[0069] In some embodiments, the time-frequency resources corresponding to the sub-channel are indicated by a first index of the resources transmitted by the PSFCH associated with the sub-channel;

[0070] The determining the time-frequency resources corresponding to the sub-channel according to the first PRB subset includes:

[0071] Determine the total number of resources corresponding to the first PRB subset at least according to the total number of cyclic shift pairs and the total number of PRBs in the PRB set;

[0072] Determine a first index of the resources transmitted by the PSFCH associated with the sub-channel according to the source terminal information of the first terminal and the total number of resources.

[0073] In some embodiments, the determining a first index of the resources transmitted by the PSFCH associated with the sub-channel according to the source terminal information of the first terminal and the total number of resources includes:

[0074] Determine the remainder after dividing the source terminal information of the first terminal by the total number of resources as the first index of the resources transmitted by the PSFCH associated with the sub-channel.

[0075] In some embodiments, the determining a first index of the resources transmitted by the PSFCH associated with the sub-channel according to the source terminal information of the first terminal and the total number of resources includes:

[0076] Dividing the total number of the resources by the total number of at least one beam direction to obtain a first number; the at least one beam direction is the beam direction for transmitting the reference signal, and the total number of the at least one beam direction is the number configured or pre-configured by the network device;

[0077] Dividing the first PRB subset according to the first number to obtain a second PRB subset corresponding to each beam direction in the at least one beam direction;

[0078] Determining the remainder after dividing the source terminal information of the first terminal by the number of PRBs in the second PRB subset as the first index of the resource for PSFCH transmission associated with the sub-channel.

[0079] In some embodiments, the PRB set is the PRB set configured by a high-layer parameter in a resource pool.

[0080] In some embodiments, the beam information includes a first indication for indicating that the beam used for the reference signal is a recommended beam or an optimal beam.

[0081] In a third aspect, an embodiment of the present application provides a feedback device for beam information, which is applied to a first terminal. The device includes:

[0082] A sending module, configured to send a reference signal for initial beam pairing and related information, where the related information is used to instruct a second terminal to send beam information corresponding to the reference signal to the first terminal, and the second terminal matches the related information.

[0083] In a fourth aspect, an embodiment of the present application provides a feedback device for beam information, which is applied to a second terminal. The device includes:

[0084] A receiving module, configured to receive a reference signal for initial beam pairing and related information;

[0085] A sending module, configured to send beam information corresponding to the reference signal to the first terminal when determining to send the beam information corresponding to the reference signal to the first terminal according to the related information.

[0086] In a fifth aspect, an embodiment of the present application provides a terminal, including: a memory and a processor;

[0087] The memory stores computer-executable instructions;

[0088] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the method of any item in the first aspect or the method of any item in the second aspect.

[0089] Sixth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, which are used to implement the method of any item in the first aspect or the method of any item in the second aspect when executed by a processor.

[0090] Seventh aspect, an embodiment of the present application provides a computer program product including a computer program, which implements the method of any item in the first aspect or the method of any item in the second aspect when executed by a processor.

[0091] Eighth aspect, an embodiment of the present application provides a chip storing a computer program, which implements the method of any item in the first aspect or the method of any item in the second aspect when executed by the chip.

[0092] Ninth aspect, an embodiment of the present application provides a chip module storing a computer program, which implements the method of any item in the first aspect or the method of any item in the second aspect when executed by the chip module.

[0093] An embodiment of the present application provides a method and device for feedback of beam information. The method includes: a first terminal sends a reference signal and related information for initial beam pairing, and the related information is used to instruct a second terminal to send beam information corresponding to the reference signal to the first terminal, and the second terminal matches the related information. In the above method, the first terminal sends the related information, so that the second terminal matching the related information sends the beam information corresponding to the reference signal, which can reduce the number of beam information received by the first terminal and reduce the difficulty for the first terminal to determine the optimal beam or the best beam. Description of the Drawings

[0094] To more clearly illustrate the technical solutions in the present application, the following briefly introduces the drawings required for description in the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0095] Figure 1 is a schematic diagram of an application scenario provided by an embodiment of the present application;

[0096] Figure 2 is one of the flowcharts of the method for feedback of beam information provided by an embodiment of the present application;

[0097] Figure 3 is the second flowchart of the method for feedback of beam information provided by an embodiment of the present application;

[0098] Figure 4It is one of the schematic structural diagrams of the beam information feedback device provided by the embodiments of the present application;

[0099] Figure 5 It is another schematic structural diagram of the beam information feedback device provided by the embodiments of the present application;

[0100] Figure 6 It is the schematic structural diagram of the terminal provided by the embodiments of the present application.

[0101] Through the above-mentioned drawings, the specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Description of the Embodiments

[0102] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0103] It should be noted that in this document, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.

[0104] In the related art, during the initial beam pairing process, the transmitting terminal broadcasts a reference signal for initial beam pairing, and all receiving terminals capable of receiving the reference signal send beam information to the transmitting end based on the reference signal. The transmitting terminal determines the optimal beam or the optimal beam based on the received beam information. In the above process, the number of receiving terminals capable of receiving the reference signal is relatively large, resulting in a relatively large amount of beam information received by the transmitting terminal, and further making it difficult for the transmitting terminal to determine the optimal beam or the optimal beam. Therefore, how to reduce the amount of beam information received by the transmitting terminal has become a technical problem to be solved urgently.

[0105] To reduce the beam information received by the transmitting terminal, the present application provides a method for feedback of beam information. In this method, the transmitting terminal can send relevant information for initial beam pairing. Through the relevant information, the receiving terminals that match the relevant information send beam information to the transmitting terminal, and other receiving terminals that do not match the relevant information do not need to send beam information to the transmitting terminal, thereby reducing the amount of beam information received by the transmitting terminal and reducing the difficulty for the transmitting terminal to determine the optimal beam or the best beam.

[0106] First, the application scenario of the method for feedback of beam information provided by the present application will be described in combination with Figure 1 FIG.

[0107] Figure 1 is a schematic diagram of the application scenario provided by the embodiment of the present application. As Figure 1 shown, it includes multiple terminals.

[0108] The terminal can also be called a terminal device or a user terminal (User Equipment, UE). The terminal can be a mobile phone, a tablet personal computer (Tablet PC), a laptop computer, a personal digital assistant (Personal Pigital Assistant, PDA), a mobile internet device (Mobile Internet Device, MID), a wearable device, or a vehicle-mounted device, etc. It should be noted that the specific type of the terminal is not limited in the embodiments of the present invention.

[0109] Multiple terminals can communicate through sidelink, for example: data transmission or signaling transmission, etc.

[0110] The communication between multiple terminals through sidelink can be one-to-one communication, or one-to-many communication, or many-to-one communication.

[0111] It should be noted that Figure 1 it is described by taking terminals 1, 2, 3, and 4 as examples among multiple terminals. Terminal 1 can send relevant information for initial beam pairing. When terminals 2 and 3 match the relevant information and terminal 4 does not match the relevant information, terminals 2 and 3 can respectively send beam information to terminal 1, and terminal 4 does not send beam information to terminal 1.

[0112] The following uses specific embodiments to elaborate in detail on the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0113] Figure 2 It is one of the schematic flowcharts of the method for feedback of beam information provided by an embodiment of the present application. As Figure 2 shown, the method includes:

[0114] S201. The first terminal sends a reference signal for initial beam pairing and related information, and the related information is used to instruct the second terminal to send the beam information corresponding to the reference signal to the first terminal, and the second terminal matches the related information.

[0115] In some embodiments of the present application, the reference signal may be a Channel State Information-Reference Signal (CSI-RS), or a Sidelink-Synchronization Signal and PBCH block (S-SSB).

[0116] In some embodiments, the related information is carried by any one of the following:

[0117] The reference signal;

[0118] The Physical Sidelink Control Channel (PSCCH) corresponding to the reference signal;

[0119] The Physical Sidelink Feedback Channel (PSFCH) corresponding to the reference signal;

[0120] The Physical Uplink Shared Channel (PSSCH) corresponding to the reference signal.

[0121] In some embodiments of the present application, the related information includes one or more of the following:

[0122] Source user info, which is used to indicate the first terminal;

[0123] Vehicle to everything (V2X) service identifiers;

[0124] Target terminal information (Tource user info), which is used to indicate the second terminal.

[0125] In some embodiments of the present application, the relevant information includes source terminal information and / or V2X service identifier, and sending the relevant information for initial beam pairing includes: sending the relevant information for initial beam pairing omnidirectionally.

[0126] In some embodiments of the present application, the source terminal information includes the application layer identifier (Application layer ID) and / or the physical layer identifier (L1 ID) of the first terminal.

[0127] In some embodiments of the present application, the target terminal information includes the application layer identifier and / or the physical layer identifier of the second terminal.

[0128] The second terminal matches the relevant information, including one or more of the following:

[0129] The relevant information includes source terminal information, and the source terminal information indicates that the first terminal has not established a unicast connection with the second terminal;

[0130] The relevant information includes a V2X service identifier, and the service indicated by the V2X service identifier is the service of the second terminal;

[0131] The relevant information includes target terminal information.

[0132] S202. When the second terminal determines the beam information corresponding to the reference signal to be sent to the first terminal according to the relevant information, it sends the beam information corresponding to the reference signal to the first terminal.

[0133] In some embodiments of the present application, determining the beam information corresponding to the reference signal to be sent to the first terminal according to the relevant information includes at least one of the following cases 1 to 3.

[0134] Case 1. The relevant information includes source terminal information. When the source terminal information indicates that the first terminal has not established a unicast connection with the second terminal, determine the beam information corresponding to the reference signal to be sent to the first terminal.

[0135] Optionally, multiple source terminal information can be pre-stored in the second terminal, and the multiple pre-stored source terminal information is the source terminal information of the terminals that have not established a unicast connection with the second terminal.

[0136] When the second terminal receives the relevant information sent by the first terminal, it determines whether the source terminal information in the relevant information is included in the multiple pre-stored source terminal information. If so, it determines the beam information corresponding to the reference signal to be sent to the first terminal.

[0137] Case 2, the relevant information includes the V2X service identifier. When the service indicated by the V2X service identifier is the service of the second terminal, determine the beam information corresponding to the reference signal to be sent to the first terminal.

[0138] Optionally, multiple V2X service identifiers may be pre-stored in the second terminal, and the services indicated by the pre-stored multiple V2X service identifiers are all the services of the second terminal.

[0139] When the second terminal receives the relevant information sent by the first terminal, determine whether the V2X service identifier in the relevant information is included in the pre-stored multiple V2X service identifiers. If so, determine the beam information corresponding to the reference signal to be sent to the first terminal.

[0140] Case 3, when the relevant information includes the target terminal information, determine the beam information corresponding to the reference signal to be sent to the first terminal.

[0141] Specifically, after the second terminal receives the reference signal and the relevant information, determine whether to send the beam information corresponding to the reference signal to the first terminal according to the relevant information. When it is determined to send the beam information corresponding to the reference signal to the first terminal, send the beam information corresponding to the reference signal to the first terminal. When it is determined not to send the beam information corresponding to the reference signal to the first terminal, cancel sending the beam information corresponding to the reference signal to the first terminal.

[0142] In the embodiments of the present application, the first terminal sends relevant information, and the relevant information is used to instruct the second terminal to send the beam information corresponding to the reference signal to the first terminal. When the second terminal determines to send the beam information corresponding to the reference signal to the first terminal according to the relevant information, the second terminal sends the beam information corresponding to the reference signal to the first terminal. The second terminal is the terminal that matches the relevant information, realizing that only the second terminal that matches the relevant information sends the beam information, reducing the number of beam information received by the first terminal, and reducing the difficulty for the first terminal to determine the optimal beam or the optimal beam.

[0143] Based on the above embodiments, the following combines Figure 3 to elaborate in detail on the beam information feedback method provided by the present application.

[0144] Figure 3 is the second flowchart of the beam information feedback method provided by the embodiments of the present application. As Figure 3 shown, the method includes:

[0145] S301. The first terminal sends a reference signal and relevant information for initial beam pairing. The relevant information is used to instruct the second terminal to send the beam information corresponding to the reference signal to the first terminal, and the second terminal matches the relevant information.

[0146] Specifically, the execution method of S301 is the same as that of S201, and the execution process of S301 will not be elaborated here.

[0147] S302. When the second terminal determines the beam information corresponding to the reference signal to be sent to the first terminal according to the relevant information, it determines the time-frequency resources corresponding to the subchannel used by the reference signal.

[0148] In some embodiments of the present application, the subchannel used by the reference signal is a resource autonomously determined by the terminal. The time-frequency resources corresponding to the subchannel used by the reference signal can be determined by using the existing technology (such as R16).

[0149] In some embodiments of the present application, the subchannel used by the reference signal is a configured resource or a pre-configured resource; determining the time-frequency resources corresponding to the subchannel used by the reference signal includes:

[0150] Within the set of Physical Resource Blocks (PRBs) available for the PSFCH used to send beam information, determine the first PRB subset of the PSFCH associated with the subchannel used by the reference signal;

[0151] According to the first PRB subset, determine the time-frequency resources corresponding to the subchannel.

[0152] In some embodiments of the present application, within the set of PRBs available for the PSFCH used to send beam information, determining the first PRB subset of the PSFCH associated with the subchannel used by the reference signal includes: mapping in ascending order in the frequency domain first and then in ascending order in the time domain to the PRBs in the first PRB subset.

[0153] In some embodiments of the present application, the time-frequency resources corresponding to the subchannel are indicated by the first index of the resources transmitted by the PSFCH associated with the subchannel;

[0154] According to the first PRB subset, determining the time-frequency resources corresponding to the subchannel includes:

[0155] Determine the total number of resources corresponding to the first PRB subset at least according to the total number of cyclic shift pairs and the total number of PRBs in the PRB set;

[0156] According to the source terminal information of the first terminal and the total number of resources, determine the first index of the resources transmitted by the PSFCH associated with the subchannel.

[0157] Optionally, the following formula 1 can be used to determine the total number of resources corresponding to the first PRB subset:

[0158]

[0159] Among them, represents the total number of resources corresponding to the first PRB subset, represents the mapping method of the subchannel and the PSFCH, represents the total number of PRBs, represents the total number of cyclic shift pairs.

[0160] takes a value of 1 or the number of subchannels occupied by a reference signal transmission.

[0161] The value of can be seen in Table 1 below.

[0162] Table 1

[0163]

[0164] In Table 1, Cyclic Shift Pair Index represents the cyclic shift pair index.

[0165] Optionally, the PRB set is the PRB set configured by a higher layer parameter in the resource pool, or the PRB set corresponding to each beam direction in at least one beam direction configured by a higher layer parameter.

[0166] The higher layer parameter is, for example, sl-PSFCH-RB-Set.

[0167] The at least one beam direction is the beam direction for transmitting the reference signal.

[0168] The total number of the at least one beam direction is the number configured or pre-configured by the network device.

[0169] Optionally, when the PRB set is the PRB set configured by a higher layer parameter in the resource pool, the first index of the resources associated with the PSFCH transmission of the subchannel can be determined according to the source terminal information of the first terminal and the total number of resources in the following manner 1 or manner 2.

[0170] Manner 1: The remainder after dividing the source terminal information of the first terminal by the total number of resources is determined as the first index of the resources associated with the PSFCH transmission of the subchannel.

[0171] Specifically, on the basis of Manner 1, the following formula 2 can be used to determine the first index:

[0172]

[0173] Among them, Set1 represents the first index, Source ID represents the source terminal information of the first terminal, and mod represents the modulo operation.

[0174] Method 2: Divide the total number of resources by the total number of at least one beam direction to obtain a first quantity;

[0175] According to the first quantity, divide the first PRB subset to obtain a second PRB subset corresponding to each beam direction among the at least one beam direction;

[0176] Determine the first index of the resource associated with the PSFCH transmission of the subchannel as the remainder after dividing the source terminal information of the first terminal by the number of PRBs in the second PRB subset.

[0177] Among them, according to the first quantity, dividing the first PRB subset to obtain a second PRB subset corresponding to each beam direction among the at least one beam direction includes:

[0178] Determine the first consecutive quantity of PRBs in the first PRB subset as the second PRB subset corresponding to one beam direction. Among them, the second PRB subsets corresponding to each beam direction among the at least one beam direction do not include the same PRB.

[0179] For example, the first PRB subset is {PRB1, PRB2, PRB3, PRB4, PRB5, PRB6}. When the first quantity is 2 and the total number of at least one beam direction is 3, the second PRB subset corresponding to the first beam direction is {PRB1, PRB2}, the second PRB subset corresponding to the second beam direction is {PRB3, PRB4}, and the second PRB subset corresponding to the third beam direction is {PRB5, PRB6}.

[0180] Specifically, based on Method 2, the following formula 3 can be used to determine the first index.

[0181] Set2 = Source ID mod R1 Formula 2;

[0182] Among them, Set2 represents the first index, Source ID represents the source terminal information of the first terminal, mod represents the modulo operation, and R1 represents the number of PRBs in the second PRB subset.

[0183] Optionally, when the PRB set is the PRB set corresponding to each beam direction configured by a higher layer parameter, through the above Method 1, according to the source terminal information of the first terminal and the total number of resources, determine the first index of the resource associated with the PSFCH transmission of the subchannel.

[0184] Optionally, when the PRB set is a PRB set configured by a high-layer parameter in the resource pool, the time-frequency resources corresponding to the subchannels used by the reference signal can also be determined by the following method:

[0185] Divide the total number of PRBs in the PRB set by the total number of at least one beam direction to obtain a first quantity; wherein, the total number of at least one beam direction is the number configured or pre-configured by the network device;

[0186] According to the first quantity, divide the PRB set to obtain a third PRB subset corresponding to each beam direction in at least one beam direction;

[0187] Determine the time-frequency resources corresponding to the subchannels according to the third PRB subset.

[0188] The method for determining the time-frequency resources corresponding to the subchannels according to the third PRB subset is similar to the method for determining the time-frequency resources corresponding to the subchannels according to the first PRB subset, and the process of determining the time-frequency resources corresponding to the subchannels according to the third PRB subset will not be elaborated here.

[0189] S303. The second terminal sends the beam information corresponding to the reference signal on the time-frequency resources corresponding to the subchannels used by the reference signal to the first terminal.

[0190] In some embodiments of the present application, the beam information includes a first indication, and the first indication is used to indicate that the beam used by the reference signal is a recommended beam or an optimal beam.

[0191] Wherein, the first indication is the value of the cyclic shift (Cyclic shift) parameter mcs. The first indication can be, for example, 0.

[0192] Specifically, the second terminal uses the scheme shown in Table 2 below to send the beam information to the first terminal.

[0193] Table 2

[0194] Beam reporting Recommended beam or optimal beam Sequence cyclic shift 0

[0195] S304. The first terminal determines the time-frequency resources corresponding to the subchannels used by the reference signal and receives the beam information sent by the second terminal device on the time-frequency resources.

[0196] Wherein, the method for the first terminal to determine the time-frequency resources corresponding to the subchannels used by the reference signal is the same as the method for the second terminal to determine the time-frequency resources corresponding to the subchannels used by the reference signal in S302, and will not be elaborated here.

[0197] It should be noted that it can be adjusted according to actual needs Figure 3The execution order of S301 to S304. For example, the step of the first terminal determining the time-frequency resources corresponding to the sub-channel used for the reference signal can be executed after S301, or the step of the first terminal determining the time-frequency resources corresponding to the sub-channel used for the reference signal can be executed after S302.

[0198] Different from the related art, in the related art, the following method is adopted to determine the time-frequency resources of the PSFCH:

[0199] Which PRBs in the high-layer parameter configuration resource pool can be used for PSFCH transmission;

[0200] By Determine the PRB set of the PSFCH associated with each sub-channel on each slot associated with the PSFCH;

[0201] By Determine the total number of PRBs available for PSFCH transmission and the cyclic shift pair associated with a PSSCH;

[0202] According to Table 1 above and Determine the PRB index and cyclic shift pair index used for one HARQ feedback associated with a PSSCH;

[0203] Where Is the total number of time slots associated with the PSFCH, N subch Represents the total number of sub-channels in the frequency domain in the resource pool, Represents the total number of PRBs used for PSFCH transmission, Represents the total number of sets into which the PRBs to be used for PSFCH transmission can be divided, P ID Represents the ID of the sending terminal, M ID Represents the ID of the receiving terminal.

[0204] In the above prior art, since modulo is taken with P ID And M ID For Finally, only one PRB can be determined. Therefore, a unique PSFCH time-frequency resource can be determined for a PSSCH. In beam information feedback, at least one PSFCH time-frequency resource is required for each beam direction in at least one beam direction. Therefore, the above prior art is no longer applicable.

[0205] In an embodiment of the present application, the total number of resources is divided by the total number of at least one beam direction to obtain a first number; the total number of at least one beam direction is a number configured or pre-configured by a network device; according to the first number, the first PRB subset is divided to obtain a second PRB subset corresponding to each beam direction among the at least one beam direction; the remainder after dividing the source terminal information of the first terminal by the number of PRBs in the second PRB subset is determined as the first index of the resource for PSFCH transmission associated with the sub-channel, and the first index indicates the time-frequency resource corresponding to the sub-channel, ensuring that each beam direction has a corresponding PSFCH time-frequency resource.

[0206] Figure 4 FIG. 4 is one of the schematic structural diagrams of a beam information feedback device provided by an embodiment of the present application. The beam information feedback device 40 may be disposed on the first terminal, such as Figure 4 shown, the beam information feedback device 40 includes:

[0207] A sending module 401, configured to send a reference signal and related information for initial beam pairing, where the related information is used to instruct a second terminal to send beam information corresponding to the reference signal to the first terminal, and the second terminal matches the related information.

[0208] The beam information feedback device provided by the embodiment of the present application may execute the method steps executed by the first terminal in the above method embodiment, and its implementation principle and beneficial effects are similar, which will not be elaborated here.

[0209] In some embodiments, the related information includes one or more of the following:

[0210] The source terminal information of the first terminal;

[0211] The vehicle-to-everything V2X service identifier;

[0212] The target terminal information of the second terminal.

[0213] In some embodiments, the source terminal information and the target terminal information respectively include one or more of the following:

[0214] The application layer identifier;

[0215] The physical layer identifier.

[0216] In some embodiments, the related information includes the source terminal information and / or the V2X service identifier; the sending module 401 is specifically configured to:

[0217] Omnidirectionally send the related information for initial beam pairing.

[0218] In some embodiments, the reference signal is a channel state information reference signal CSI-RS, or a sidelink synchronization signal block S-SSB.

[0219] In some embodiments, the relevant information is carried by any one of the following:

[0220] The reference signal;

[0221] The physical sidelink control channel PSCCH corresponding to the reference signal;

[0222] The physical sidelink feedback channel PSFCH corresponding to the reference signal;

[0223] The physical sidelink shared channel PSSCH corresponding to the reference signal.

[0224] In some embodiments, the beam information includes a first indication for indicating that the beam used for the reference signal is a recommended beam or an optimal beam.

[0225] In some embodiments, the apparatus further includes:

[0226] A determination module, configured to determine the time-frequency resources corresponding to the subchannel used for the reference signal;

[0227] A receiving module, configured to receive the beam information sent by the second terminal device on the time-frequency resources.

[0228] In some embodiments, the subchannel used for the reference signal is a configured resource or a preconfigured resource; specifically, the determination module is configured to:

[0229] Determine a first PRB subset of the PSFCH associated with the subchannel used for the reference signal within the set of physical resource blocks PRBs available for the PSFCH used for transmitting the beam information;

[0230] Determine the time-frequency resources corresponding to the subchannel according to the first PRB subset.

[0231] In some embodiments, the time-frequency resources corresponding to the subchannel are indicated by a first index of the resources transmitted by the PSFCH associated with the subchannel; specifically, the determination module is configured to:

[0232] Determine the total number of resources corresponding to the first PRB subset at least according to the total number of cyclic shift pairs and the total number of PRBs in the PRB set;

[0233] Determine the first index of the resources transmitted by the PSFCH associated with the subchannel according to the source terminal information of the first terminal and the total number of resources.

[0234] In some embodiments, the determining module is specifically configured to:

[0235] Determine the remainder after dividing the source terminal information of the first terminal by the total number of resources as the first index of the resources for PSFCH transmission associated with the sub-channel.

[0236] In some embodiments, the determining module is specifically configured to:

[0237] Divide the total number of resources by the total number of at least one beam direction, where the at least one beam direction is the beam direction for transmitting the reference signal, and the total number of the at least one beam direction is the number configured or pre-configured by the network device, to obtain a first number;

[0238] According to the first number, divide the first PRB subset to obtain a second PRB subset corresponding to each beam direction in the at least one beam direction;

[0239] Determine the remainder after dividing the source terminal information of the first terminal by the number of PRBs in the second PRB subset as the first index of the resources for PSFCH transmission associated with the sub-channel.

[0240] In some embodiments, the PRB set is a PRB set configured by a high-layer parameter in the resource pool.

[0241] The beam information feedback device provided in the embodiments of the present application can execute the method steps executed by the first terminal in the above method embodiments, and its implementation principle and beneficial effects are similar, and will not be elaborated here.

[0242] Figure 5 It is the second structural schematic diagram of the beam information feedback device provided in the embodiments of the present application. The beam information feedback device 50 is disposed on the second terminal, as Figure 5 shown, the beam information feedback device 50 includes:

[0243] A receiving module 501, configured to receive a reference signal and related information for initial beam pairing;

[0244] A sending module 502, configured to send the beam information corresponding to the reference signal to the first terminal when determining to send the beam information corresponding to the reference signal to the first terminal according to the related information.

[0245] The beam information feedback device provided in the embodiments of the present application can execute the method steps executed by the second terminal in the above method embodiments, and its implementation principle and beneficial effects are similar, and will not be elaborated here.

[0246] In some embodiments, the related information includes one or more of the following:

[0247] Source terminal information, where the source terminal information is used to indicate the first terminal;

[0248] Vehicle-to-Everything V2X service identifier;

[0249] Destination terminal information, where the destination terminal information is used to indicate the second terminal.

[0250] In some embodiments, the source terminal information and the destination terminal information respectively include one or more of the following:

[0251] Application layer identifier;

[0252] Physical layer identifier.

[0253] In some embodiments, the device further includes a determination module; the determination module is configured to:

[0254] When the relevant information includes the source terminal information and the source terminal information indicates that the first terminal has not established a unicast connection with the second terminal, determine to send the beam information corresponding to the reference signal to the first terminal;

[0255] Or,

[0256] When the relevant information includes the V2X service identifier and the service indicated by the V2X service identifier is the service of the second terminal, determine to send the beam information corresponding to the reference signal to the first terminal;

[0257] Or,

[0258] When the relevant information includes the destination terminal information, determine to send the beam information corresponding to the reference signal to the first terminal.

[0259] In some embodiments, the reference signal is a Channel State Information Reference Signal CSI-RS, or a Sidelink Synchronization Signal Block S-SSB.

[0260] In some embodiments, the relevant information is carried by any one of the following:

[0261] The reference signal;

[0262] The Physical Sidelink Control Channel PSCCH corresponding to the reference signal;

[0263] The Physical Sidelink Feedback Channel PSFCH corresponding to the reference signal;

[0264] The Physical Sidelink Shared Channel PSSCH corresponding to the reference signal.

[0265] In some embodiments,

[0266] A determination module, specifically configured to determine the time-frequency resources corresponding to the subchannels used by the reference signal;

[0267] A transmission module 502, configured to transmit beam information corresponding to the reference signal to a first terminal on the time-frequency resources.

[0268] In some embodiments, the subchannels used by the reference signal are configured resources or pre-configured resources; the determination module is specifically configured to:

[0269] Within the set of physical resource blocks (PRBs) where the physical shared control channel (PSFCH) available for transmitting the beam information is located, determine a first subset of PRBs of the PSFCH associated with the subchannels used by the reference signal;

[0270] According to the first subset of PRBs, determine the time-frequency resources corresponding to the subchannels.

[0271] In some embodiments, the time-frequency resources corresponding to the subchannels are indicated by a first index of the resources transmitted by the PSFCH associated with the subchannels; the determination module is specifically configured to:

[0272] Determine the total number of resources corresponding to the first subset of PRBs at least according to the total number of cyclic shift pairs and the total number of PRBs in the PRB set;

[0273] According to the source terminal information of the first terminal and the total number of resources, determine the first index of the resources transmitted by the PSFCH associated with the subchannels.

[0274] In some embodiments, the determination module is specifically configured to:

[0275] Determine the remainder after dividing the source terminal information of the first terminal by the total number of resources as the first index of the resources transmitted by the PSFCH associated with the subchannels.

[0276] In some embodiments, the determination module is specifically configured to:

[0277] Divide the total number of resources by the total number of at least one beam direction to obtain a first number; the at least one beam direction is the beam direction for transmitting the reference signal, and the total number of the at least one beam direction is the number configured or pre-configured by the network device;

[0278] According to the first number, divide the first subset of PRBs to obtain a second subset of PRBs corresponding to each beam direction in the at least one beam direction;

[0279] Determine the remainder after dividing the source terminal information of the first terminal by the number of PRBs in the second subset of PRBs as the first index of the resources transmitted by the PSFCH associated with the subchannels.

[0280] In some embodiments, the PRB set is a PRB set configured by high-layer parameters in a resource pool.

[0281] In some embodiments, the beam information includes a first indication for indicating that the beam used by the reference signal is a recommended beam or an optimal beam.

[0282] The feedback device for beam information provided in the embodiments of the present application can execute the method steps executed by the second terminal in the above method embodiments. The implementation principle and beneficial effects are similar and will not be elaborated here.

[0283] Figure 6 It is a schematic structural diagram of a terminal provided in the embodiments of the present application. The terminal 60 may be the above-mentioned first terminal or second terminal. Figure 6 As shown, the terminal 60 may include: a memory 601, a processor 602, and a transceiver 603.

[0284] The memory 601 is used to store program instructions.

[0285] The processor 602 is used to execute the program instructions stored in the memory to enable the terminal to execute the method executed by the above-mentioned first terminal or the method executed by the second terminal.

[0286] The transceiver 603 may include: a transmitter and / or a receiver. The transmitter may also be referred to as a sender, a transmitter, a sending port, or a sending interface, etc. The receiver may also be referred to as a receiver, a receiving port, or a receiving interface, etc. Exemplarily, the memory 601, the processor 602, and the transceiver 603 are interconnected with each other through a bus 604.

[0287] All or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a readable memory. When the program is executed, it executes the steps including the above method embodiments; and the foregoing memory (storage medium) includes: read-only memory (ROM), RAM, flash memory, hard disk, solid-state drive, magnetic tape, floppy disk, optical disc, and any combination thereof.

[0288] The embodiments of the present application provide a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, they are used to implement the method executed by the first terminal or the method executed by the second terminal in the above method embodiments.

[0289] An embodiment of this application also provides a computer program product, including a computer program, which, when executed by a processor, can implement the method executed by the first terminal or the method executed by the second terminal in the above method embodiments.

[0290] An embodiment of this application provides a chip, on which a computer program is stored. When the computer program is executed by the chip, it implements the method of any item in the first aspect or the method of any item in the second aspect in the above method embodiments.

[0291] An embodiment of this application provides a chip module, on which a computer program is stored. When the computer program is executed by the chip module, it implements the method of any item in the first aspect or the method of any item in the second aspect in the above method embodiments.

[0292] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device, and the instruction device implements in the process Figure 1 one process or multiple processes and / or blocks Figure 1 the functions specified in one block or multiple blocks.

[0293] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide for implementing in the process Figure 1 one process or multiple processes and / or blocks Figure 1 the steps of the functions specified in one block or multiple blocks.

[0294] Obviously, those skilled in the art can make various changes and modifications to the embodiments of this application without departing from the spirit and scope of this application. In this way, if these modifications and variations of the embodiments of this application fall within the scope of the claims of this application and their equivalent technologies, this application also intends to include these changes and variations.

[0295] In this application, the term "including" and its variations can mean non-limiting inclusion; the term "or" and its variations can mean "and / or". In this application, terms such as "first" and "second" are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. In this application, "multiple" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally means that the associated objects before and after are in an "or" relationship.

Claims

1. A method for feedback of beam information, characterized in that, Applied to a first terminal, the method includes: Sending a reference signal and related information for initial beam pairing, where the related information is used to instruct a second terminal to send beam information corresponding to the reference signal to the first terminal, and the second terminal matches the related information.

2. The method according to claim 1, characterized in that, The related information includes one or more of the following: Source terminal information of the first terminal; Vehicle-to-Everything V2X service identifier; Target terminal information of the second terminal.

3. The method according to claim 2, characterized in that, The source terminal information and the target terminal information respectively include one or more of the following: Application layer identifier; Physical layer identifier.

4. The method according to claim 2 or 3, characterized in that, The related information includes the source terminal information and / or the V2X service identifier; sending the related information for initial beam pairing includes: Omnidirectionally sending the related information for initial beam pairing.

5. The method according to any one of claims 1 to 4, characterized in that, The reference signal is a Channel State Information Reference Signal CSI-RS or a Sidelink Synchronization Signal Block S-SSB.

6. The method according to claim 5, characterized in that, The related information is carried by any one of the following: The reference signal; The Physical Sidelink Control Channel PSCCH corresponding to the reference signal; The Physical Sidelink Feedback Channel PSFCH corresponding to the reference signal; The Physical Sidelink Shared Channel PSSCH corresponding to the reference signal.

7. The method according to any one of claims 1 to 6, characterized in that, The beam information includes a first indication, and the first indication is used to indicate that the beam used by the reference signal is a recommended beam or an optimal beam.

8. The method according to any one of claims 1 to 7, characterized in that, The method further includes: Determining the time-frequency resources corresponding to the subchannel used by the reference signal; Receiving the beam information sent by the second terminal device on the time-frequency resources.

9. The method according to claim 8, characterized in that, The subchannel used by the reference signal is a configured resource or a preconfigured resource; Determining the time-frequency resources corresponding to the subchannel used by the reference signal includes: Determining a first PRB subset of the PSFCH associated with the subchannel used by the reference signal within the set of Physical Resource Blocks PRBs available for sending the beam information; Determining the time-frequency resources corresponding to the subchannel according to the first PRB subset.

10. The method according to claim 9, characterized in that, The time-frequency resources corresponding to the subchannel are indicated by a first index of the resources transmitted by the PSFCH associated with the subchannel; Determining the time-frequency resources corresponding to the subchannel according to the first PRB subset includes: Determining the total number of resources corresponding to the first PRB subset at least according to the total number of cyclic shift pairs and the total number of PRBs in the PRB set; Determining a first index of the resources transmitted by the PSFCH associated with the subchannel according to the source terminal information of the first terminal and the total number of resources.

11. The method according to claim 10, characterized in that,The determining a first index of the resources transmitted by the PSFCH associated with the subchannel according to the source terminal information of the first terminal and the total number of resources includes: Determining the remainder after dividing the source terminal information of the first terminal by the total number of resources as the first index of the resources transmitted by the PSFCH associated with the subchannel.

12. The method according to claim 10, wherein, The determining a first index of the resources transmitted by the PSFCH associated with the subchannel according to the source terminal information of the first terminal and the total number of resources includes: Dividing the total number of the resources by the total number of at least one beam direction to obtain a first number; the at least one beam direction is the beam direction for transmitting the reference signal, and the total number of the at least one beam direction is the number configured or pre-configured by the network device; Dividing the first PRB subset according to the first number to obtain a second PRB subset corresponding to each beam direction in the at least one beam direction; Determining the remainder after dividing the source terminal information of the first terminal by the number of PRBs in the second PRB subset as a first index of the resources associated with the PSFCH transmission of the sub-channel.

13. The method according to any one of claims 9 to 12, wherein, The PRB set is the PRB set configured by a high-layer parameter in the resource pool.

14. A method for feedback of beam information, wherein, Applied to a second terminal, the method includes: Receiving a reference signal and related information for initial beam pairing; When determining the beam information corresponding to the reference signal to be sent to the first terminal according to the related information, sending the beam information corresponding to the reference signal to the first terminal.

15. The method according to claim 14, wherein, The related information includes one or more of the following: Source terminal information, which is used to indicate the first terminal; Vehicle-to-Everything V2X service identifier; Target terminal information, which is used to indicate the second terminal.

16. The method according to claim 15, wherein, The source terminal information and the target terminal information respectively include one or more of the following: Application layer identifier; Physical layer identifier.

17. The method according to claim 15 or 16, wherein, The determining the beam information corresponding to the reference signal to be sent to the first terminal according to the related information includes: When the related information includes the source terminal information and the source terminal information indicates that the first terminal has not established a unicast connection with the second terminal, determining the beam information corresponding to the reference signal to be sent to the first terminal; Or, When the related information includes the V2X service identifier and the service indicated by the V2X service identifier is the service of the second terminal, determining the beam information corresponding to the reference signal to be sent to the first terminal; Or, When the related information includes the target terminal information, determining the beam information corresponding to the reference signal to be sent to the first terminal.

18. The method according to any one of claims 14 to 17, wherein, The reference signal is a channel state information reference signal CSI-RS or a sidelink synchronization signal block S-SSB.

19. The method according to claim 18, wherein, The related information is carried by any one of the following: The reference signal; The physical sidelink control channel PSCCH corresponding to the reference signal; The physical sidelink feedback channel PSFCH corresponding to the reference signal; The physical sidelink shared channel PSSCH corresponding to the reference signal.

20. The method according to any one of claims 14 to 19, wherein, Sending the beam information corresponding to the reference signal to the first terminal includes: Determining the time-frequency resources corresponding to the sub-channel used by the reference signal; Sending the beam information corresponding to the reference signal to the first terminal on the time-frequency resources.

21. The method according to claim 20, wherein, The sub-channel used by the reference signal is a configured resource or a pre-configured resource; Determining the time-frequency resources corresponding to the sub-channel used by the reference signal includes: Within the set of physical resource blocks (PRBs) available for the Physical Shared Feedback Channel (PSFCH) used to transmit the beam information, determine a first subset of PRBs of the PSFCH associated with the subchannel used by the reference signal; Based on the first subset of PRBs, determine the time-frequency resources corresponding to the subchannel.

22. The method according to claim 21, wherein, The time-frequency resources corresponding to the subchannel are indicated by a first index of the resources transmitted by the PSFCH associated with the subchannel; The determining the time-frequency resources corresponding to the subchannel based on the first subset of PRBs includes: Determine the total number of resources corresponding to the first subset of PRBs based at least on the total number of cyclic shift pairs and the total number of PRBs in the PRB set; Based on the source terminal information of the first terminal and the total number of resources, determine a first index of the resources transmitted by the PSFCH associated with the subchannel.

23. The method according to claim 21, wherein, The determining the first index of the resources transmitted by the PSFCH associated with the subchannel based on the source terminal information of the first terminal and the total number of resources includes: Determine the remainder after dividing the source terminal information of the first terminal by the total number of resources as the first index of the resources transmitted by the PSFCH associated with the subchannel.

24. The method according to claim 21, wherein, The determining the first index of the resources transmitted by the PSFCH associated with the subchannel based on the source terminal information of the first terminal and the total number of resources includes: Divide the total number of resources by the total number of at least one beam direction, where the at least one beam direction is the beam direction for transmitting the reference signal, and the total number of the at least one beam direction is the number configured or pre-configured by the network device; Based on the first quantity, divide the first subset of PRBs to obtain a second subset of PRBs corresponding to each beam direction in the at least one beam direction; Determine the remainder after dividing the source terminal information of the first terminal by the number of PRBs in the second subset of PRBs as the first index of the resources transmitted by the PSFCH associated with the subchannel.

25. The method according to any one of claims 21 to 24, wherein, The PRB set is a set of PRBs configured by a higher layer parameter in a resource pool.

26. The method according to any one of claims 14 to 25, wherein, The beam information includes a first indication for indicating that the beam used by the reference signal is a recommended beam or an optimal beam.

27. A feedback device for beam information, wherein, Applied to a first terminal, the apparatus includes: A sending module, configured to send a reference signal and related information for initial beam pairing, where the related information is used to instruct a second terminal to send beam information corresponding to the reference signal to the first terminal, and the second terminal matches the related information.

28. A feedback device for beam information, wherein, Applied to a second terminal, the apparatus includes: A receiving module, configured to receive a reference signal and related information for initial beam pairing; A sending module, configured to send beam information corresponding to the reference signal to the first terminal when determining to send beam information corresponding to the reference signal to the first terminal according to the related information.

29. A terminal, wherein, Includes: A memory and a processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, such that the processor performs the method according to any one of claims 1 to 13, or the method according to any one of claims 14 to 26.

30. A computer-readable storage medium, wherein, Computer-executable instructions are stored in the computer-readable storage medium and, when executed by a processor, are used to implement the method according to any one of claims 1 to 13, or the method according to any one of claims 14 to 26.

31. A computer program product, wherein, A computer program is included, which, when executed by a computer, implements the method according to any one of claims 1 to 13, or the method according to any one of claims 14 to 26.

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