Sidelink transmission method and apparatus, and terminal

Abstract

The present application relates to the technical field of communications. Disclosed are a sidelink transmission method and apparatus, and a terminal. The method is applied to a first terminal. The method comprises: executing first-type coordination information transmission; and / or, executing physical sidelink feedback channel (PSFCH) transmission, wherein the PSFCH transmission comprises at least one of the following: first-type PSFCH transmission, which is used for carrying hybrid automatic repeat request acknowledgement (HARQ-ACK) information, second-type PSFCH transmission, which is used for carrying second-type coordination information, the second-type coordination information being conflict information, and third-type PSFCH transmission, which is used for avoiding channel occupancy time (COT) interruption.

Description

A direct link transmission method, device and terminal

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202311459952.5 filed in China on November 3, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a direct link transmission method, device, and terminal. Background Art

[0004] In direct link communications, terminals select resources based on their own resource perception results. In this case, since the perception results on the transmitting terminal side cannot reflect the channel environment on the receiving terminal side, they are easily affected by hidden nodes, exposed nodes, half-duplex, etc. As a result, the resources selected by the transmitting terminal may not be suitable for the receiving terminal, or there may be resource conflicts between the resources selected by the transmitting terminal and those selected by other terminals.

[0005] Summary of the Invention

[0006] The purpose of the present application is to provide a direct link transmission method, apparatus and terminal, so as to solve the problem that the resources currently selected by the sending terminal are not suitable for the receiving terminal or there is a resource conflict with the resources selected by other terminals.

[0007] In a first aspect, to achieve the above-mentioned objectives, embodiments of the present application provide a direct link transmission method, applied to a first terminal, comprising at least one of the following:

[0008] Perform the first type of coordinated information transmission;

[0009] Performing physical direct link feedback channel (PSFCH) transmission; wherein the PSFCH transmission includes at least one of the following:

[0010] The first type of PSFCH transmission is used to carry hybrid automatic repeat request confirmation HARQ-ACK information;

[0011] The second type of PSFCH transmission is used to carry the second type of coordination information; wherein the second type of coordination information is conflict information;

[0012] The third type of PSFCH transmission is used to avoid channel occupation time (COT) interruption.

[0013] Optionally, the method further includes:

[0014] Receive coordination request information sent by the second terminal, wherein the coordination request information includes at least one of the following:

[0015] The number of resource block sets (RB sets) is used to indicate the number of RB sets occupied by the transmission of the physical direct link control channel (PSCCH) and / or the physical direct link shared channel (PSSCH);

[0016] First RB set information, used to indicate a candidate RB set available for PSCCH and / or PSSCH transmission;

[0017] Second RB set information, used to indicate an RB set in which the second terminal detects a continuous listen-before-talk C-LBT failure;

[0018] The first sub-channel number is used to indicate the number of sub-channels occupied by PSCCH and / or PSSCH transmission in all occupied RB sets;

[0019] Resource reservation cycle;

[0020] The start time of the resource selection window;

[0021] The deadline for the resource selection window;

[0022] The resource set type is used to indicate the type of resource set that the first terminal is expected to provide, wherein the type of resource set includes an expected resource set and / or an unexpected resource set.

[0023] Optionally, the first type of coordination information includes at least one of the following:

[0024] A resource combination information set, used to indicate time-frequency information of resources corresponding to at least one resource combination provided by the first terminal;

[0025] A position of a reference time slot, used to indicate a position of a time slot where a first resource in a first resource combination in the at least one resource combination is located;

[0026] a position indication of a first resource, used to indicate an offset value of a time slot where a first resource in each resource combination other than the first resource combination in the at least one resource combination is located relative to the reference time slot;

[0027] A resource set type, used to indicate the type of the resource set provided by the first terminal, wherein the type of the resource set includes an expected resource set and / or an unexpecting resource set;

[0028] A lowest subchannel indication, used to indicate a subchannel with a smallest index corresponding to the first resource in each resource combination in the at least one resource combination provided by the first terminal;

[0029] The lowest RB set indication is used to indicate the RB set with the smallest index corresponding to the first resource in each resource combination in the at least one resource combination provided by the first terminal.

[0030] Optionally, each resource combination information in the resource combination information set includes at least one of the following:

[0031] The time domain resource indication value TRIV is used to indicate the time domain information corresponding to the resources in the resource combination;

[0032] A first frequency domain resource indication value FRIV is used to indicate subchannel information corresponding to a resource in the resource combination;

[0033] The second FRIV is used to indicate RB set information corresponding to the resources in the resource combination.

[0034] Optionally, the method further includes:

[0035] Determine one or more resources for second-type PSFCH transmission according to the PSCCH and / or PSSCH transmission resources reserved by the second terminal and having resource conflict; or

[0036] One or more resources for second-type PSFCH transmission are determined based on the time-frequency resources where the direct link control information SCI sent by the second terminal is located, wherein the PSCCH and / or PSSCH transmission resources indicated by the SCI are detected by the first terminal as causing resource conflict.

[0037] Optionally, the determined one or more resources for second-type PSFCH transmission meet at least one of the following conditions:

[0038] The time domain interval between any two adjacent time slots where resources for the second type of PSFCH transmission are located is the PSFCH resource period;

[0039] Any first time slot in which resources for second-type PSFCH transmission are located is located before the second time slot in which PSCCH and / or PSSCH transmission resources reserved by the second terminal and in which resource conflict occurs, and the number of time slots between any one of the first time slots and the second time slot is greater than or equal to the first value;

[0040] Any one of the first time slots is located after the third time slot where the SCI is located, and the number of time slots between any one of the first time slots and the third time slot is greater than or equal to a second value.

[0041] Optionally, the method further includes:

[0042] Determine a first PSFCH transmission that can be performed by the first terminal based on at least one transmission index value of at least one PSFCH transmission performed by the first terminal as needed, power of the at least one PSFCH transmission, number of the at least one PSFCH transmission, a power threshold, and a number threshold; wherein the transmission index value is related to a category of the PSFCH transmission and / or a priority of the PSFCH transmission, and the first PSFCH transmission satisfies at least one of the following:

[0043] The total power of the first PSFCH transmission is less than or equal to the power threshold;

[0044] The number of the first PSFCH transmissions is less than or equal to the number threshold;

[0045] The number of the first PSFCH transmissions is greater than or equal to a third value.

[0046] Optionally, the index value of the first type of PSFCH transmission is smaller than the index value of the second type of PSFCH transmission, and the index value of the second type of PSFCH transmission is smaller than the index value of the third type of PSFCH transmission.

[0047] In a second aspect, to achieve the above-mentioned objectives, an embodiment of the present application provides a direct link transmission method, applied to a second terminal, comprising at least one of the following:

[0048] receiving first-type coordination information transmitted by a first terminal;

[0049] receiving a PSFCH transmitted by the first terminal, wherein the PSFCH transmission performed by the first terminal includes at least one of the following:

[0050] The first type of PSFCH transmission is used to carry HARQ-ACK information;

[0051] The second type of PSFCH transmission is used to carry the second type of coordination information; wherein the second type of coordination information is conflict information;

[0052] The third type of PSFCH transmission is used to avoid COT interruption.

[0053] Optionally, the method further includes:

[0054] Sending coordination request information to the first terminal; wherein the coordination request information includes at least one of the following:

[0055] The number of resource block sets (RB sets) is used to indicate the number of RB sets occupied by PSCCH and / or PSSCH transmissions.

[0056] First RB set information, used to indicate a candidate RB set available for PSCCH and / or PSSCH transmission;

[0057] Second RB set information, used to indicate an RB set in which the second terminal detects a continuous listen-before-talk C-LBT failure;

[0058] The first sub-channel number is used to indicate the number of sub-channels occupied by PSCCH and / or PSSCH transmission in all occupied RB sets;

[0059] Resource reservation cycle;

[0060] The start time of the resource selection window;

[0061] The deadline for the resource selection window;

[0062] The resource set type is used to indicate the type of resource set expected to be provided by the first terminal, wherein the type of resource set includes and / or non-expected resource sets.

[0063] In a third aspect, to achieve the above-mentioned objectives, embodiments of the present application provide a direct link transmission device, applied to a first terminal, comprising at least one of the following:

[0064] A first execution module, configured to execute the first type of coordination information transmission;

[0065] The second execution module is configured to perform PSFCH transmission, wherein the PSFCH transmission includes at least one of the following:

[0066] The first type of PSFCH transmission is used to carry HARQ-ACK information;

[0067] The second type of PSFCH transmission is used to carry the second type of coordination information; wherein the second type of coordination information is conflict information;

[0068] The third type of PSFCH transmission is used to avoid COT interruption.

[0069] In a fourth aspect, to achieve the above-mentioned objectives, embodiments of the present application provide a direct link transmission device, applied to a second terminal, including a receiving module, wherein the receiving module is configured to perform at least one of the following:

[0070] receiving first-type coordination information transmitted by a first terminal;

[0071] receiving a PSFCH transmitted by the first terminal, where the PSFCH transmission includes at least one of the following:

[0072] The first type of PSFCH transmission is used to carry HARQ-ACK information;

[0073] The second type of PSFCH transmission is used to carry the second type of coordination information; wherein the second type of coordination information is conflict information;

[0074] The third type of PSFCH transmission is used to avoid COT interruption.

[0075] In a fifth aspect, in order to achieve the above-mentioned purpose, an embodiment of the present application provides a user equipment, including a transceiver, a memory, a processor, and a computer program stored on the memory and running on the processor, wherein when the processor executes the computer program, the direct link transmission method as described in the first aspect or the direct link transmission method as described in the second aspect is implemented.

[0076] In a sixth aspect, in order to achieve the above-mentioned purpose, an embodiment of the present application provides a readable storage medium on which a program is stored. When the program is executed by a processor, the direct link transmission method as described in the first aspect or the direct link transmission method as described in the second aspect is implemented.

[0077] The above technical solution of the present application has at least the following beneficial effects:

[0078] In the direct link transmission method of an embodiment of the present application, a first terminal performs first-type coordination information transmission; and / or performs physical direct link feedback channel (PSFCH) transmission; wherein the PSFCH transmission includes at least one of the following: a first-type PSFCH transmission for carrying hybrid automatic repeat request acknowledgment (HARQ-ACK) information; a second-type PSFCH transmission for carrying second-type coordination information; wherein the second-type coordination information is conflict information; and a third-type PSFCH transmission for avoiding channel occupancy time (COT) interruptions. In this way, a second terminal can select a transmission resource or perform resource reselection based on the first-type coordination information sent by the first terminal and / or the information carried in the PSFCH transmission, so that the second terminal selects a more suitable transmission resource and / or avoids resource conflict with resources selected by other terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] FIG1 is a schematic diagram of a flow chart of a direct link transmission method according to an embodiment of the present application;

[0080] FIG2 is a second flow chart of the direct link transmission method according to an embodiment of the present application;

[0081] FIG3 is a schematic diagram of resource combination in an embodiment of the present application;

[0082] FIG4A is a schematic diagram showing one of the resources for determining PSFCH transmission in an embodiment of the present application;

[0083] FIG4B is a second schematic diagram of determining resources for PSFCH transmission in an embodiment of the present application;

[0084] FIG4C is a third schematic diagram of determining resources for PSFCH transmission in an embodiment of the present application;

[0085] FIG4D is a fourth schematic diagram of determining resources for PSFCH transmission in an embodiment of the present application;

[0086] FIG4E is a fifth schematic diagram of determining resources for PSFCH transmission in an embodiment of the present application;

[0087] FIG4F is a sixth schematic diagram of determining resources for PSFCH transmission in an embodiment of the present application;

[0088] FIG5A is a schematic diagram of resources used for PSFCH transmission according to an embodiment of the present application;

[0089] FIG5B is a second schematic diagram of resources used for PSFCH transmission in an embodiment of the present application;

[0090] FIG6 is a schematic diagram of a structure of a direct link transmission device according to an embodiment of the present application;

[0091] FIG7 is a second structural diagram of the direct link transmission device according to an embodiment of the present application;

[0092] FIG8 is a schematic structural diagram of a terminal according to an embodiment of the present application. DETAILED DESCRIPTION

[0093] In order to make the technical problems, technical solutions and advantages to be solved by the present application clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures has been omitted.

[0094] It should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0095] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the following 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.

[0096] In the embodiments provided herein, it should be understood that "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B based solely on A; B can also be determined based on A and / or other information.

[0097] When describing the embodiments of the present application, relevant technical points are first explained.

[0098] 1. Inter-UE coordination (IUC) mechanism

[0099] There are two main solutions in the inter-terminal coordination mechanism:

[0100] Scheme 1: The coordinating terminal (UE-A) feeds back coordination information to the coordinated terminal (UE-B), where the coordination information includes a resource set (preferred resource set or non-preferred resource set). The coordinated terminal determines the available resource set based on the resource set fed back by the coordinating terminal and selects the sending resource.

[0101] Scheme 2: The coordinating terminal (UE-A) determines whether the resources reserved by the coordinated terminal (UE-B) conflict with those of other terminals based on the resource indication information received from the coordinated terminal (UE-B). Here, other terminals are terminals other than UE-B, such as UE-A, or UEs other than UE-A and UE-B. If a resource conflict exists, the coordinating terminal indicates the conflict information to the coordinated terminal. After receiving the resource conflict indication information, the coordinated terminal triggers resource reselection for the conflicting resources.

[0102] 2. Definition of Hybrid Automatic Repeat reQuest (HARQ) Round Trip Time (RTT) in SL-U

[0103] The interval between any two transmission resources in a transport block (TB) must be greater than or equal to Z = a + b, where:

[0104] a represents the interval between the last symbol of the first Physical Sidelink Shared Channel (PSSCH) transmission resource and the first symbol of the last Physical Sidelink Feedback Channel (PSFCH) transmission resource corresponding to the PSSCH transmission;

[0105] b represents the sum of the PSFCH reception and processing time and the direct link retransmission preparation time.

[0106] Below, in conjunction with the accompanying drawings, the direct link transmission method, device and terminal provided in the embodiments of the present application are described in detail.

[0107] An embodiment of the present application provides a direct link transmission method, which is applied to a first terminal, wherein the first terminal is a coordinating UE in an IUC or a UE that needs to perform PSFCH transmission. As shown in FIG1 , the method includes:

[0108] Step 101 includes at least one of the following:

[0109] Execute the first type of coordination information transmission; here, the first type of coordination information is the coordination information including the Preferred resource set or the Non-preferred resource set, that is, the coordination information defined in the aforementioned IUC scheme 1; the first type of coordination information is carried in the Media Access Control (MAC) control element (CE), or the first type of coordination information is carried in the MAC CE and the sidelink control information (SCI) format 2-C (format 2-C); in addition, for the IUC mechanism triggered by the request information, the first terminal should receive the request information sent by the second terminal before executing the first type of coordination information transmission, wherein the request information is carried in the MAC CE, or the MAC CE and the SCI format 2-C. The request information or coordination information is transmitted through the PSSCH;

[0110] Perform PSFCH transmission; wherein the PSFCH transmission includes at least one of the following:

[0111] The first type of PSFCH transmission is used to carry HARQ-ACK information;

[0112] The second type of PSFCH transmission is used to carry the second type of coordination information; wherein the second type of coordination information is conflict information, that is, the second type of PSFCH transmission is used to carry conflict information, and the conflict information is the coordination information defined in the aforementioned IUC scheme 2;

[0113] The third type of PSFCH transmission is used to avoid channel occupied time (COT) interruption.

[0114] Here, it should be noted that when the first terminal performs the transmission of the first type of coordination information or the second type of PSFCH transmission, the first terminal is a coordinating UE; when the first terminal performs the first type of PSFCH transmission, the first terminal is a UE that receives PSCCH / PSSCH transmission; when the first terminal performs the third type of PSFCH transmission, the first terminal is a COT initiating UE (COT initiating UE) or a COT responding UE (COT responding UE).

[0115] In the direct link transmission method of an embodiment of the present application, the first terminal performs a first type of coordination information transmission; and / or performs a PSFCH transmission; wherein the PSFCH transmission includes at least one of the following: a first type of PSFCH transmission for carrying HARQ-ACK information; a second type of PSFCH transmission for carrying a second type of coordination information; wherein the second type of coordination information is conflict information; and a third type of PSFCH transmission for avoiding COT interruption. In this way, the second terminal can select a transmission resource or perform resource reselection based on the first type of coordination information sent by the first terminal and / or the information carried by the PSFCH transmission, so that the second terminal selects a more appropriate transmission resource and / or does not conflict with resources selected by other terminals, thereby improving the reliability of system data transmission.

[0116] Furthermore, as an optional implementation, the method further includes:

[0117] Receive coordination request information sent by a second terminal; where the second terminal is a coordinated UE in the IUC, wherein the coordination request information includes at least one of the following:

[0118] The number of resource block sets (RB sets) is used to indicate the number of RB sets occupied by the Physical Sidelink Control Channel (PSCCH) and / or PSSCH transmissions. Specifically, the number of RB sets is the number of RB sets occupied by PSCCH / PSSCH transmissions in a time slot, or the number of RB sets is the number of RB sets occupied by a single PSCCH / PSSCH transmission.

[0119] The first RB set information is used to indicate a candidate RB set available for PSCCH and / or PSSCH transmission. Specifically, the first RB set information is, for example, an RB set list, and the first RB set information is specifically a candidate RB set available for PSCCH / PSSCH transmission in a time slot, or the first RB set information is a frequency domain range of a resource selection window, that is, resources are selected for PSCCH and / or PSSCH transmission within the frequency domain range, or the first terminal determines a preferred resource set or a non-preferred resource set within the frequency domain range;

[0120] second RB set information, used to indicate an RB set in which the second terminal detects a consistent listen-before-talk (C-LBT) failure; wherein, when the coordination request information carries the second RB set information, the first terminal (coordinating UE) needs to exclude candidate resources that overlap with the RB set indicated by the second RB set information from the candidate resource set during a resource exclusion process when determining a desired resource set (Preferred resource set); alternatively, when the first terminal (coordinating UE) determines a non-preferred resource set (Non-preferred resource set), the candidate resources that overlap with the RB set indicated by the second RB set information are Non-preferred resources; or, when the first terminal determines the Non-preferred resource set, the resources in the RB set indicated by the second RB set information are Non-preferred resources;

[0121] The first subchannel number is used to indicate the number of subchannels occupied by PSCCH and / or PSSCH transmissions in all occupied RB sets. Specifically, the first subchannel number is the number of subchannels occupied by a single PSCCH / PSSCH transmission (in all occupied RB sets) in a time slot.

[0122] The second subchannel number is used to indicate the number of subchannels occupied by PSCCH and / or PSSCH transmissions in one RB set. Specifically, the second subchannel number is the number of subchannels occupied by a single PSCCH / PSSCH transmission in one time slot in one RB set. The number of subchannels and subchannel indexes occupied by PSCCH and / or PSSCH transmissions in different occupied RB sets are the same.

[0123] Resource reservation cycle / resource reservation interval;

[0124] The start time of the resource selection window;

[0125] The deadline for the resource selection window;

[0126] The resource set type is used to indicate the type of resource set that the first terminal is expected to provide, wherein the type of resource set includes a preferred resource set (Preferred resource set) and / or a non-preferred resource set (Non-preferred resource set).

[0127] Here, it should be noted that the first terminal can trigger the IUC mechanism ((Request-based IUC scheme 1)) based on the coordination request information of the second terminal, or can trigger the IUC mechanism (Condition-based IUC scheme 1) based on a condition, wherein, because the first terminal (coordinating UE) needs to determine the Preferred resource set or the Non-preferred resource set according to the above parameters (parameters carried in the aforementioned coordination request information), therefore, for the request-triggered inter-terminal coordination mechanism Scheme 1 (Request-based IUC scheme 1), the above parameters can be obtained through the coordination request information, and for Condition-based scheme 1, because there is no coordination request information, the first terminal (coordinating UE) can determine the relevant parameters based on configuration or pre-configuration or pre-definition or depending on UE implementation.

[0128] As an optional implementation, the first type of coordination information includes at least one of the following:

[0129] A resource combination information set, used to indicate time-frequency information of resources corresponding to at least one resource combination; that is, information of each resource combination in the resource combination information set is determined by time-frequency information of resources in each resource combination provided by the first terminal; here, the preferred resource set or non-preferred resource set includes one or more resource combinations;

[0130] The position of the reference time slot is used to indicate the position of the time slot in which the first resource in the first resource combination in the at least one resource combination is located; here, in the time domain, the first resource in the first resource combination can be understood as the resource with the earliest time domain position among all resources included in the preferred resource set or the non-preferred resource set, that is, the first resource;

[0131] a first resource position indication, used to indicate an offset value of a time slot in which a first resource in each resource combination other than the first resource combination, among the at least one resource combination, is located relative to the reference time slot; wherein the first resource in each resource combination is located before other resources in the resource combination in the time domain;

[0132] A resource set type, used to indicate the type of a resource set provided by the first terminal, wherein the type of the resource set includes a preferred resource set (Preferred resource set) and / or a non-preferred resource set (Non-preferred resource set);

[0133] A lowest subchannel indication, used to indicate a subchannel with a smallest index corresponding to the first resource in each resource combination in the at least one resource combination provided by the first terminal;

[0134] The lowest RB set indication is used to indicate the RB set with the smallest index corresponding to the first resource in each resource combination in the at least one resource combination provided by the first terminal.

[0135] It should be noted here that in the above two optional implementation methods, the coordination request information / coordination information includes information related to the RB set, so that the direct link transmission method of the embodiment of the present application can solve the problem that the IUC mechanism cannot be applied due to the introduction of the interlaced resource block (IRB) structure in the direct link (Sidelink Unlicense, SL-U) working in the unlicensed frequency band.

[0136] As a specific implementation, each resource combination information in the resource combination information set includes at least one of the following:

[0137] The time resource indicator value (TRIV) is used to indicate the time domain information corresponding to the resources in the resource combination. Specifically, if a resource combination contains two resources, TRIV is used to indicate the time domain information of the second resource; if a resource combination contains three resources, TRIV is used to indicate the time domain information of the second and third resources.

[0138] A first frequency resource indicator value (FRIV) is used to indicate the subchannel information corresponding to a resource in a resource combination. Specifically, if a resource combination contains two resources, the FRIV is used to indicate the subchannel corresponding to the second resource, including the starting subchannel and the number of subchannels. If a resource combination contains three resources, the FRIV is used to indicate the subchannels corresponding to the second and third resources, including the starting subchannel and the number of subchannels.

[0139] The second FRIV is used to indicate the RB set information corresponding to the resources in the resource combination. Specifically, if a resource combination contains two resources, the FRIV is used to indicate the RB set corresponding to the second resource, including the starting RB set and the number of RB sets. If a resource combination contains three resources, the FRIV is used to indicate the RB sets corresponding to the second and third resources, including the starting RB set and the number of RB sets.

[0140] Here, when the IUC mechanism is supported (i.e., transmission of the first type of coordination information or coordination request information), the relevant SCI is described.

[0141] The first stage of SCI (1 st -stage SCI) contains at least one of the following:

[0142] The first indication field is used to indicate the second stage SCI (2 nd -stage SCI) format;

[0143] The second indication field is used to distinguish the information format contained in the second-stage SCI indicated by the first indication field.

[0144] Specifically, for 1 st The description of the relevant indication fields of -stage SCI is shown in Table 1 below.

[0145] Table 1

[0146] The content contained in SCI format 2-C1 is related technology, and for details, please refer to Section 8.4.1.3 of TS 38.212 Version 17.6.0;

[0147] The contents of SCI format 2-C2 are:

[0148] HARQ process number, new data indicator, redundancy version, source ID, destination ID, HARQ feedback enabled / disabled indicator, and CSI request.

[0149] Request information / coordination information indication; wherein, if the value is set to 0, it indicates that the SCI format 2-C contains coordination information, wherein the coordination information includes at least one of the following: resource combination (resource combination information set), location indication of the first resource, location of the reference time slot, Resource set type, lowest subchannel indication, lowest RB set indication, etc.; if the value is set to 1, it indicates that the SCI format 2-C contains request information, wherein the request information includes at least one of the following: number of RB sets, first RB set information, second RB set information, number of subchannels (first subchannel number and / or second subchannel number), resource reservation interval / resource reservation period, start time and end time of the resource selection window, and Resource set type.

[0150] Furthermore, before the first terminal transmits the first type of coordination information, the method further includes:

[0151] A resource set provided by the first terminal is determined.

[0152] If the resource set provided by the first terminal is a preferred resource set, the preferred resource set determined by the first terminal needs to meet the following conditions:

[0153] (1) The preferred resource set is the set of candidate resources remaining after the first terminal performs resource exclusion based on the sensing result and the skip slot (time slot not monitored), wherein the first terminal does not need to exclude candidate resources that overlap with the RB set in which the first terminal detects C-LBT failure;

[0154] Here, it should be noted that currently the first terminal (coordinating UE) executes TS 38.214 section 8.1.4 to determine that the remaining candidate resource set that meets the conditions is the Preferred resource set. However, the problem is that the resource exclusion due to C-LBT failure has been added to the current resource exclusion process, and the resources corresponding to the C-LBT failure are just not suitable for the first terminal to send, which may not necessarily have an impact on the second terminal. Therefore, the resource exclusion of the first terminal in this step is unnecessary; however, if the coordination request information contains an RB set corresponding to the C-LBT failure detected by the second terminal, it is necessary to exclude candidate resources that overlap with these RB sets. In short, when determining the Preferred resource set, the first terminal needs to exclude candidate resources that overlap with the RB set corresponding to the C-LBT failure detected by the second terminal (provided that the request information contains this information), but does not need to exclude candidate resources that overlap with the RB set corresponding to the C-LBT failure detected by the first terminal;

[0155] (2) Preferred resource set is a set of candidate resources remaining after the first terminal excludes resources on time slots where it is not desired to receive, wherein the first terminal is a receiving UE of the coordinated UE.

[0156] If the type of the resource set provided by the first terminal is a non-preferred resource set, the resources in the non-preferred resource set determined by the first terminal include:

[0157] Resources reserved by other UEs, and the corresponding Reference Signal Received Power (RSRP) measurement value is greater than a (pre-)configured first RSRP threshold value;

[0158] Resources reserved by other UEs, and corresponding RSRP measurement values ​​are lower than a (pre-)configured second RSRP threshold value; wherein the first terminal is a receiving UE of the other UEs;

[0159] Due to half-duplex limitations, the first terminal does not expect resources on the time slot for SL reception;

[0160] The RB set corresponding to the C-LBT failure detected by the first terminal has overlapping resources or resources within the corresponding RB set.

[0161] Next, with reference to FIG3 , the implementation process of the request-based IUC mechanism is described:

[0162] First, UE-B, as the coordinated UE, sends a coordination request message to UE-A (the coordinating UE), which contains the following:

[0163] The number of RB sets is 2, indicating that the number of RB sets occupied by a single PSCCH / PSSCH transmission is 2;

[0164] The number of subchannels (second subchannel number) is 2, indicating that a single PSCCH / PSSCH transmission occupies 2 subchannels in each of the above RB sets, and the two subchannels occupied in each RB set have consecutive subchannel indexes, and the subchannels occupied in different RB sets have the same index.

[0165] The resource reservation cycle is 100ms;

[0166] The start time and end time of the resource selection window are shown in Figure 3, denoted as n+T1 and n+T2 respectively;

[0167] The resource set type is Preferred resource set, which means UE-A needs to determine the Preferred resource set;

[0168] Second, after receiving the above-mentioned coordination request information, UE-A performs resource exclusion based on the above-mentioned parameters, determines that the remaining candidate resource set is the Preferred resource set, and feeds back the coordination information to UE-B. As shown in Figure 3, the Preferred resource set contains a total of 9 resources, which can be divided into 3 resource combinations. The position of the resources in each resource combination is indicated by (TRIV&FRIV1&FRIV2), wherein TRIV can be used to obtain the time domain position of the last two resources in each resource combination, FRIV1 can be used to obtain the starting subchannel and the number of subchannels occupied by the last two resources in each resource combination, as well as the number of subchannels occupied by the first resource, and FRIV2 can be used to obtain the starting RB set and the number of RB sets occupied by the last two resources in each resource combination, as well as the number of RB sets occupied by the first resource. In addition, the starting subchannel (the subchannel with the smallest index) and the starting RB set (the RB set with the smallest index) occupied by the first resource in each resource combination need to be indicated in the coordination information.

[0169] Furthermore, as an optional implementation, the method further includes:

[0170] According to the PSCCH and / or PSSCH transmission resources reserved by the second terminal and having resource conflicts, one or more resources for second-type PSFCH transmission are determined; first, the PSCCH and / or PSSCH transmission resources reserved by the second terminal and having resource conflicts refer to: the first-stage SCI (1 st -stage SCI) and a resource conflict occurs for that resource; for example, 1 st -stage SCI has reserved 2 resources, here refers to 1 st -stage SCI reserves the first resource and the resource conflicts; two, the resources of multiple second-type PSFCH transmissions are located in different time slots; or,

[0171] According to the direct link control information SCI (here refers to 1 st -stage SCI, that is, the time-frequency resources where SCI format 1-A) is located, determines one or more resources for second-type PSFCH transmission, wherein the PSCCH and / or PSSCH transmission resources reserved by the second terminal indicated by the SCI are detected by the first terminal to cause resource conflict.

[0172] That is to say, if the first terminal detects that there is a resource conflict in the resources reserved by the second terminal for PSCCH / PSSCH transmission, the first terminal needs to determine the resources used for the second type of PSFCH transmission (carrying the conflict information) based on the resources with the resource conflict; or, the first terminal needs to determine the resources used for the second type of PSFCH transmission (carrying the conflict information) based on the time-frequency resources (PSCCH / PSSCH transmission) where the SCI corresponding to the resources with the resource conflict is located.

[0173] The implementation process of this optional implementation method can be expressed in another way: the first terminal determines the locations of N or a maximum of N second-type PSFCH transmission resources based on the conflicting reserved resources (that is, the first terminal detects that the PSCCH / PSSCH transmission resources reserved by the second terminal conflict with the transmission resources of other UEs or the first terminal itself), where N is configured or pre-configured or pre-defined; or, the first terminal determines the locations of N or a maximum of N second-type PSFCH transmission resources based on the time-frequency resources where the SCI that reserves the conflicting resources is located (the SCI sent by the second terminal reserves a resource, the first terminal detects that the reserved resource conflicts, and the first terminal determines the location of the second-type PSFCH transmission resource based on the time-frequency resources where the SCI is located).

[0174] It should be noted that the SL-U modifies the definition of HARQ round trip time (RTT) so that a single PSSCH transmission can correspond to one or more candidate PSFCH transmissions. Currently, IUC Scheme 2 only determines a single corresponding PSFCH transmission resource after detecting a conflicting PSCCH / PSSCH transmission resource, and does not provide a method for determining the PSFCH transmission resource when a PSSCH transmission corresponds to multiple candidate PSFCH transmissions. This optional implementation method can determine the locations of multiple second-category PSFCH transmission resources, thereby perfectly resolving the aforementioned issues in related technologies.

[0175] As a specific implementation, in the above optional implementation, the one or more resources determined for the second type PSFCH transmission meet at least one of the following conditions:

[0176] The time domain interval between any two adjacent time slots where resources for the second type of PSFCH transmission are located is the PSFCH resource period;

[0177] Any first time slot where the resources for the second type of PSFCH transmission are located is located before the second time slot where the PSCCH and / or PSSCH transmission resources reserved by the second terminal and where the resource conflict occurs, and the number of time slots between any one of the first time slots and the second time slot is greater than or equal to the first value; for example: the resources for the second type of PSFCH transmission (in the time domain) are located before the conflicting resources, and the interval between the time slot where any one of the second type of PSFCH transmission resources is located and the time slot where the conflicting resources are located is at least T3 time slots (located in the resource pool), where T3 is equal to The definition of is shown in Table 2 below;

[0178] Table 2

[0179] Any one of the first time slots is located after the third time slot where the SCI is located, and the number of time slots between any one of the first time slots and the third time slot is greater than or equal to a second value. That is, any one of the time slots where the second-type PSFCH transmission resource is located is located after the time slot where the SCI is located, and the interval between the two is at least the second value of time slots.

[0180] Here, the first value and the second value are configured, pre-configured, or protocol-predefined values.

[0181] 4A to 4F , the process of determining resources for the second type of PSFCH transmission in the above implementation will be described.

[0182] As shown in FIG. 4A to FIG. 4F , the interval between the initial transmission resources and the retransmission resources includes two sets of PSFCH resources located in different time slots, that is, the HARQ-ACK feedback information corresponding to the initial transmission (first type of PSFCH transmission) has two candidate transmission opportunities.

[0183] For IUC scheme 2-1 (determining the resources for the second-type PSFCH transmission based on the conflicting resources), the resources for the PSFCH transmission that transmits conflict information (the second-type PSFCH transmission) are associated with the conflicting PSCCH / PSSCH resources (i.e., the resources reserved by UE-B in Figures 4A, 4B, and 4E). That is, the resources for the second-type PSFCH transmission are determined based on the conflicting PSCCH / PSSCH transmission resources, and the resources for the second-type PSFCH transmission are located before the conflicting resources. Furthermore, to account for processing delays (e.g., receiving conflict information, reselection preparation time, etc.), the interval between the resources for the second-type PSFCH transmission and the conflicting resources must be at least T3 time slots (logical time slots).

[0184] As shown in Figure 4A, because the interval b between the time slot where the last group of PSFCH resources is located and the conflicting resources (the resources reserved by UE-B's SCI) is greater than T3, the conflicting resources can be associated with a corresponding second-type PSFCH transmission resource in each PSFCH time slot, and the time domain interval between the two second-type PSFCH transmission resources is the PSFCH period (that is, located in two adjacent time slots containing PSFCH resources).

[0185] Thus, during the PSFCH transmission process, if the first second-class PSFCH transmission is not sent (for example, due to LBT failure or the need to abandon the current PSFCH transmission based on priority comparison), the second second-class PSFCH transmission is continued.

[0186] As shown in FIG4B , because the interval b between the time slot where the last group of PSFCH resources is located and the conflicting resources is less than T3, the conflicting resources can only be associated with one resource of the second type of PSFCH transmission in the first group of PSFCH resources.

[0187] As shown in FIG. 4E , when a PSFCH resource is associated with a conflicting resource, resources for two PSFCH transmissions associated with the conflicting resource may be determined.

[0188] For IUC scheme 2-2 (determining the resources for the second type of PSFCH transmission based on the SCI corresponding to the conflicting resources), the resources for the PSFCH transmission that transmits the conflict information (the second type of PSFCH transmission) are associated with the time-frequency resources where the SCI indicating the conflicting PSCCH / PSSCH resources is located. That is, the resources for the second type of PSFCH transmission are determined based on the time-frequency resources where the SCI indicating the conflicting PSCCH / PSSCH transmission resources is located, and the resources for the second type of PSFCH transmission are located after the SCI and before the conflicting resources. In addition, considering the processing delay (such as receiving conflict information, reselection preparation time, etc.), it is necessary to ensure that the interval between the resources for the second type of PSFCH transmission and the conflicting resources is at least T3 time slots (logical time slots).

[0189] As shown in Figure 4C, because the interval b between the time slot where the last group of PSFCH resources is located and the conflicting resources (the resources reserved by UE-B's SCI) is greater than T3, the resources where the SCI is located can be associated with a corresponding second-type PSFCH transmission resource in each PSFCH time slot, and the time domain interval between the two second-type PSFCH transmission resources is the PSFCH period (that is, located in two adjacent time slots containing PSFCH resources).

[0190] Thus, during the PSFCH transmission process, if the first second-class PSFCH transmission is not sent (for example, due to LBT failure or the need to abandon the current PSFCH transmission based on priority comparison), the second second-class PSFCH transmission is continued.

[0191] As shown in Figure 4D, because the interval b between the time slot where the last group of PSFCH resources is located and the conflicting resources (the resources reserved by UE-B's SCI) is less than T3, the resources where the SCI is located can only be associated with a second type of PSFCH transmission resource in the first group of PSFCH resources.

[0192] As shown in FIG. 4F , when PSFCH resources are associated with an SCI indicating conflicting resources, resources of two PSFCH transmissions associated with the SCI indicating conflicting resources may be determined.

[0193] Furthermore, as an optional implementation, the method further includes:

[0194] Determine a first PSFCH transmission that can be performed by the first terminal based on at least one transmission index value of at least one PSFCH transmission that needs to be performed by the first terminal, the power of the at least one PSFCH transmission, the number of the at least one PSFCH transmission, a power threshold, and a number threshold, wherein the at least one PSFCH transmission that needs to be performed by the first terminal is, that is, at least one PSFCH transmission scheduled by the first terminal; wherein determining the first PSFCH transmission that can be performed by the first terminal includes determining the power of each PSFCH transmission in the first PSFCH transmission and determining the number of PSFCH transmissions included in the first PSFCH transmission; wherein the transmission index value is related to the category of the PSFCH transmission and / or the priority of the PSFCH transmission, and the first PSFCH transmission satisfies at least one of the following:

[0195] The total power of the first PSFCH transmission is less than or equal to the power threshold;

[0196] The number of the first PSFCH transmissions is less than or equal to the number threshold;

[0197] The number of the first PSFCH transmissions is greater than or equal to a third value, where the third value is 1, for example.

[0198] A specific example of this optional implementation is as follows:

[0199] First, on the one hand, determining whether the number of PSFCH transmissions that need to be scheduled by the first terminal is greater than a number threshold, and on the other hand, determining the total power of the scheduled PSFCH transmissions based on the power of each PSFCH transmission scheduled by the first terminal, and determining whether the total power is greater than a power threshold;

[0200] Secondly, if the number of scheduled PSFCH transmissions is less than or equal to the number threshold and the total power of the scheduled PSFCH transmissions is greater than the power threshold, then according to the transmission index value of each PSFCH transmission, the power of each PSFCH transmission and the power threshold, determine the first PSFCH transmission that the first terminal can perform, the first PSFCH transmission includes one or more PSFCH transmissions, and the total power of the first PSFCH transmission is less than or equal to the power threshold; or,

[0201] If the number of scheduled PSFCH transmissions is greater than the quantity threshold, determining, based on the transmission index value of each PSFCH transmission, the power of each PSFCH transmission, the power threshold, and the quantity threshold, a first PSFCH transmission that the first terminal can perform, the first PSFCH transmission including one or more PSFCH transmissions, and the total power of the first PSFCH transmission is less than or equal to the power threshold and the number of PSFCH transmissions included in the first PSFCH transmission is less than or equal to the quantity threshold; or,

[0202] If the number of scheduled PSFCH transmissions is less than or equal to the number threshold and the total power of the scheduled PSFCH transmissions is less than or equal to the power threshold, it is determined that the first PSFCH transmission that the first terminal can perform includes all PSFCH transmissions that require the first terminal to be scheduled.

[0203] Specifically, the index value of the first type of PSFCH transmission is smaller than the index value of the second type of PSFCH transmission, and the index value of the second type of PSFCH transmission is smaller than the index value of the third type of PSFCH transmission. When performing PSFCH transmission, the PSFCH transmission with the smaller transmission index value is prioritized. In other words, the first type of PSFCH transmission takes precedence over the second type of PSFCH transmission, and the second type of PSFCH transmission takes precedence over the third type of PSFCH transmission.

[0204] Exemplarily, the index value of the first type of PSFCH transmission is equal to the priority value of the first type of transmission, and the index value of the second type of PSFCH transmission is equal to (the priority value of the second type of PSFCH transmission + 8). For example, the index value of the second type of PSFCH transmission with a priority of 1 is 9. The index value of the third type of PSFCH transmission is 17.

[0205] Here, it should be noted that, based on the configuration or pre-configuration or pre-definition of the priority corresponding to the third category PSFCH transmission, when determining the transmission index value of each PSFCH transmission, first sort them according to the category of PSFCH transmission (first category PSFCH transmission takes precedence over second category PSFCH transmission, and second category PSFCH transmission takes precedence over third category PSFCH transmission), and then, for each category of PSFCH transmission, sort them according to the priority value; for example, the PSFCH transmissions to be executed include 2 first category PSFCH transmissions (priority values ​​1 and 2, respectively), 2 second category PSFCH transmissions (priority values ​​1 and 2, respectively) and 2 third category PSFCH transmissions. SFCH transmission (the priority is configured as 8, that is, the priority of the third type of PSFH transmission is the lowest priority); the transmission index values ​​of the 6 PSFCH transmissions that need to be executed are: the transmission index value of the first type of PSFCH transmission with a priority value of 1 is 1, the transmission index value of the first type of PSFCH transmission with a priority value of 2 is 2, the transmission index value of the second type of PSFCH transmission with a priority value of 1 is 9, the transmission index value of the second type of PSFCH transmission with a priority value of 2 is 10, and the transmission index values ​​of the two third type of PSFCH transmissions with a priority value of 8 are both 24, or the default is 17 (greater than the value of the first and second type of PSFCH transmission index values).

[0206] It should also be noted that, based on the priority corresponding to the third type of PSFCH transmission that is not configured or pre-configured or pre-defined, when determining the transmission index value of each PSFCH transmission, it is first sorted according to the category of PSFCH transmission (the first type of PSFCH transmission takes precedence over the second type of PSFCH transmission, and the second type of PSFCH transmission takes precedence over the third type of PSFCH transmission), and then, for the first type of PSFCH transmission and the second type of PSFSCH transmission, it is sorted according to the priority value (the sorting process is the same as the previous process and will not be repeated here); for the third type of PSFCH transmission, a transmission index value is randomly assigned to each PSFCH transmission of the third type of PSFCH transmission, and the randomly assigned transmission index value needs to be greater than the first and second type of PSFCH transmission index values, or defaults to 17 (a value greater than the first and second type of PSFCH transmission index values).

[0207] That is to say, when the first terminal needs to perform PSFCH transmission, power limitation and / or transmission quantity limitation are required to ensure that the actual total number of PSFCH transmissions does not exceed the quantity threshold (quantity threshold value), and the actual total power of PSFCH transmission does not exceed the power threshold (power threshold value).

[0208] Here, it is assumed that the first terminal supports the third type of PSFCH transmission to avoid COT interruption (the information carried by the third type of PSFCH transmission is not limited here), and the priority corresponding to the third type of PSFCH transmission is a configured or pre-configured or predefined priority, or the priority of the third PSFCH transmission is the lowest priority. The control process of PSFCH is as follows:

[0209] Regarding power limitation: the actual PSFCH transmission is determined based on the transmission index value sorting, so as to ensure that the actual total power of the PSFCH transmission does not exceed the power threshold. The PSFCH transmission may include the first type of PSFCH transmission, and / or the second type of PSFCH transmission, and / or the third type of PSFCH transmission; another way of describing it is: if the total power of the PSFCH transmission (of all types) exceeds the power threshold, the third type of PSFCH transmission is given priority (assuming that the transmission index value of the third type of PSFCH transmission is greater than the transmission index value of the first type of PSFCH transmission and the transmission index value of the second type of PSFCH transmission, or in other words, the priority of the third type of PSFCH transmission is lower than the priority of the first type of PSFCH transmission and the priority of the second type of PSFCH transmission);

[0210] Regarding the limit on the number of transmissions: If the total number of PSFCH transmissions exceeds the number threshold, PSFCH transmissions with smaller transmission index values ​​(corresponding to higher priorities) are preferentially selected based on the transmission index value, and the number of selected PSFCH transmissions is less than or equal to the number threshold. Alternatively, if the total number of PSFCH transmissions exceeds the number threshold, the third type of PSFCH transmission is preferentially abandoned (assuming that the transmission index value of the third type of PSFCH transmission is greater than the transmission index value of the first type of PSFCH transmission and the transmission index value of the second type of PSFCH transmission, or in other words, the priority of the third type of PSFCH transmission is lower than the priority of the first type of PSFCH transmission and the priority of the second type of PSFCH transmission).

[0211] Here, it should be noted that the resources occupied by a single PSFCH transmission in the embodiment of the present application may include a first comb-shaped resource block (Interlaced Resource Block, IRB) and a first number of physical resource blocks (Physical Resource Block, PRB), the first IRB refers to a shared IRB, that is, different PSFCH transmissions located in the same RB set and the same time slot occupy the same first IRB. Or a single PSFCH transmission resource occupies a second IRB, and the second IRB is a dedicated IRB, that is, the PSFCH transmission resources corresponding to the orthogonal PSCCH / PSSCH transmission resources are orthogonal.

[0212] Among them, if the resources occupied by a single PSFCH transmission include a first IRB and a first number of PRBs, when the first terminal needs to perform multiple PSFCH transmissions in an RB set (that is, the PSFCH transmissions are located in the same RB set), only one PSFCH transmission needs to occupy the first IRB and the first number of PRBs, and other PSFCH transmissions only need to occupy the first number of PRBs (that is, when the first terminal needs to perform multiple PSFCH transmissions in an RB set, only one PSFCH transmission is performed on the first IRB). The unused first IRB in the other PSFCH transmissions can be called a dropped PRB (Dropped PRB) or a dropped common PRB (Dropped common PRB). The one PSFCH transmission (that is, the transmission occupying the first IRB and the first number of PRBs) is the PSFCH transmission with the lowest priority. Here, the situation is explained in conjunction with Figure 5A: Assuming that a UE needs to perform three PSFCH transmissions in one RB set, the UE's transmission behavior can be: only one PSFCH transmission is performed on the Common IRB, that is, it can be understood that only one PSFCH transmission occupies one Common IRB and one Dedicated PRB, and the other two transmissions only occupy one Dedicated PRB.

[0213] In addition, if the resources occupied by a single PSFCH transmission include a first IRB and a first number of PRBs, if a PRB in the first IRB corresponding to a certain PSFCH transmission and a PRB in the first number of PRBs corresponding to other PSFCH transmissions are located within 1MHz (or expressed as the absolute value of the difference between the indexes corresponding to the above two PRBs), and the resources corresponding to the "certain PSFCH transmission" (excluding a certain PRB in the first IRB) can still meet the OCB requirements, then the "certain PRB in the first IRB" may not be used as a resource for PSFCH transmission, that is, the PRB can also be called a Dropped PRB or a Dropped common PRB.

[0214] The actual Dropped common PRB may include one or both of the above definitions.

[0215] In addition, if the dedicated PRB (dedicated PRB, specifically referring to the PRB in the first number of PRBs or the PRB in the second IRB) occupied by at least two PSFCH transmissions of the same UE is located at 1MHz, and the PSFCH transmission at 1MHz exceeds the (power spectral density, PSD) constraint, then part of the PSFCH transmission is abandoned based on the transmission index value (related to the priority) or based on the priority until the PSD constraint is met.

[0216] Here, in combination with Figure 5B, the situation where the resources occupied by a single PSFCH transmission include a first IRB and a first number of PRBs is explained: Assuming that a UE needs to perform 3 PSFCH transmissions in an RB set, the UE's transmission behavior can be: each PSFCH transmission occupies 1 Common IRB and 1 Dedicated PRB, that is, the Common IRB corresponds to 3 PSFCH transmissions.

[0217] As an optional implementation manner, the step of performing PSFCH transmission in the embodiment of the present application includes: determining the power of PSFCH transmission according to any of the following items: wherein determining the power of PSFCH transmission includes: calculating the transmit power of PSFCH transmission, and / or controlling and adjusting the number of PSFCH transmissions and / or transmit power; the above steps are described below for different situations:

[0218] 1. For the situation within coverage (i.e., with the high-layer parameter dl-P0-PSFCH)

[0219] 1. The resources transmitted by PSFCH include Dedicated IRB (second IRB)

[0220] Method 1:

[0221] (1) Calculate the transmit power of a single transmission based on the PRBs actually occupied by the PSFCH transmission:

[0222] First, calculate the power on a single PRB according to the following formula: PSFCH,one PRB =P O,PSFCH +10log 10 (2 μ )+α PSFCH PL [dBm]

[0223] Then, the power of a single PSFCH transmission is calculated according to the following formula:

[0224] in, Indicates the number of PRBs (actually) occupied by a single PSFCH transmission. That is, the power calculated based on the actual number of occupied PRBs for different PSFCH transmissions may be different.

[0225] (2) Power control adjustment process:

[0226] Assume that N is the number of scheduled PSFCH transmissions;

[0227] If N is less than or equal to the number threshold (number threshold), and the total power of N transmissions is less than or equal to the power threshold (power threshold), then the number of PSFCH transmissions determined is N; where the total power of N transmissions is The power of the i-th PSFCH transmission is P PSFCH,one,i ;

[0228] If N is less than or equal to the quantity threshold value (quantity threshold value), and the total power of N transmissions is greater than the power threshold value (power threshold value), then N1 transmissions are determined based on the transmission index value, wherein the total power of N1 transmissions is less than or equal to the power threshold value, and the determined number of PSFCH transmissions is the maximum value among all N1s that meet the conditions, assuming it is N2, that is, the determined number of PSFCH transmissions is N2; on this basis, in the determined N2 PSFCH transmissions, the power of the i-th PSFCH transmission is min{power threshold value -10log10(N2),P PSFCH,one,i}, or, the power of the i-th PSFCH transmission is min{power threshold - 10log10(all PRBs occupied by N2 PSFCH transmissions) + 10log10(PRBs occupied by the i-th PSFCH transmission), P PSFCH,one,i};

[0229] If N is greater than the number threshold value (number threshold), then the number threshold value PSFCH transmissions are determined based on the transmission index value; wherein, if the total power of the determined number threshold value PSFCH transmissions is less than or equal to the power threshold value, then the number of PSFCH transmissions is determined to be equal to the number threshold value, and the power of the i-th PSFCH transmission is P PSFCH,one,i; If the total power of the determined number threshold value PSFCH transmissions is greater than the power threshold value, then N1 transmissions are determined based on the transmission index value, where the total power of N1 transmissions is less than or equal to the power threshold value. Further, the determined number of PSFCH transmissions is the maximum value among all N1 that meet the conditions, assumed to be N2, that is, the determined number of PSFCH transmissions is N2. On this basis, among the determined N2 PSFCH transmissions, the power of the i-th PSFCH transmission is min{power threshold value-10log10(N2),PPSFCH,one,i}, or the power of the i-th PSFCH transmission is min{power threshold value-10log10(the number of all PRBs occupied by N2 PSFCH transmissions)+10log10(the number of PRBs occupied by the i-th PSFCH transmission),PPSFCH,one,i}.

[0230] Method 2:

[0231] (1) Calculate the transmit power of a single transmission based on the reference PRB corresponding to a single PSFCH transmission:

[0232] First, calculate the power on a single PRB according to the following formula: PSFCH,one PRB =P O,PSHCH +10log 10 (2 μ )+α PSFCH PL [dBm]

[0233] Then, the power of a single PSFCH transmission is calculated according to the following formula:

[0234] in, Indicates the number of reference PRBs corresponding to a single PSFCH transmission, or the number of reference PRBs corresponding to a single IRB in an RB set. That is, the power of each PSFCH transmission is equal;

[0235] (2) Power control adjustment process:

[0236] Assume that N is the number of scheduled PSFCH transmissions;

[0237] If N is less than or equal to the number threshold (number threshold), and the total power of N transmissions is less than or equal to the power threshold (power threshold), then the number of PSFCH transmissions is determined to be N, where the total power of N transmissions is P PSFCH,one +10log 10 (N Tx,PSFCH ), the power of each PSFCH transmission is P PSFCH,one ;

[0238] If N is less than or equal to the number threshold value (number threshold value), and the total power of N transmissions is greater than the power threshold value (power threshold value), then N1 transmissions are determined based on the transmission index value, where the total power of N1 transmissions is less than or equal to the power threshold value, and the determined number of PSFCH transmissions is the maximum value among all N1s that meet the conditions, assuming it is N2, that is, the determined number of PSFCH transmissions is N2; on this basis, in the determined N2 PSFCH transmissions, the power of each PSFCH transmission is min{power threshold value -10log10(N2),P PSFCH,one};

[0239] If N is greater than the number threshold value (number threshold), then the number threshold value PSFCH transmissions are determined based on the transmission index value, wherein, if the total power of the number threshold value PSFCH transmissions is less than or equal to the power threshold value, the number of PSFCH transmissions determined is the number threshold value, and the power of the i-th PSFCH transmission is P PSFCH,one ; If the total power of the number threshold value PSFCH transmissions is greater than the power threshold value, then N1 transmissions are determined based on the transmission index value, where the total power of N1 transmissions is less than or equal to the power threshold value. Further, the determined number of PSFCH transmissions is the maximum value among all N1 that meet the conditions, assuming it is N2, that is, the determined number of PSFCH transmissions is N2. On this basis, the determined number of PSFCH transmissions is N2, and the power of each PSFCH transmission is min{power threshold value -10log10(N2), P PSFCH,one}.

[0240] 2. The resources used for PSFCH transmission are: Common IRB + Dedicated PRB

[0241] Method 1:

[0242] (1) Calculate the transmit power of a single transmission based on the PRBs actually occupied by the PSFCH transmission:

[0243] First, calculate the power on a single PRB:

[0244] The power on the Common PRB is calculated using the following formula:

[0245] P PSFCH,one common PRB =P O,PSFCH +10log 10 (2 μ )+α PSFCH PL-P offset [dBm]; where P offset Indicates the power offset between Common PRB and Dedicated PRB;

[0246] The power on the dedicated PRB is calculated according to the following formula: PPSFCH, one dedicated PRB = P O,PSFCH +10log 10 (2 μ )+α PSFCH PL [dBm];

[0247] Then, determine the power of a single PSFCH transmission:

[0248] Among them, P PSFCH,one,i,common Indicates the power of a single PSFCH transmission on the Common IRB;

[0249] PPSFCH,one,i,dedicated represents the power of a single PSFCH transmission on the Dedicated PRB;

[0250] Indicates the number of Common PRBs occupied by a single PSFCH transmission, excluding the Dropped common PRBs defined above. If all Common PRBs are Dropped common PRBs, that is, If it is equal to 0, it means P PSFCH,one,i,common 1dBm or 0W (watt);

[0251] Indicates the number of dedicated PRBs occupied by a single PSFCH transmission.

[0252] (2) Power control adjustment process:

[0253] Assume that N is the number of scheduled PSFCH transmissions;

[0254] If N is less than or equal to the number threshold (number threshold), and the total power of N transmissions is less than or equal to the power threshold (power threshold), then the number of PSFCH transmissions determined is N; where the total power of N transmissions is The power of the i-th PSFCH transmission is P PSFCH,one,i ;

[0255] If N is less than or equal to the quantity threshold value (quantity threshold value), and the total power of N transmissions is greater than the power threshold value (power threshold value), then N1 transmissions are determined based on the transmission index value, wherein the total power of N1 transmissions is less than or equal to the power threshold value, and the determined number of PSFCH transmissions is the maximum value among all N1s that meet the conditions, assuming it is N2, that is, the determined number of PSFCH transmissions is N2; on this basis, in the determined N2 PSFCH transmissions, the power of the i-th PSFCH transmission is min{power threshold value -10log10(N2),P PSFCH,one,i}; Alternatively, the power of the i-th PSFCH transmission is calculated as follows:

[0256] 1) Allocate the power corresponding to the power threshold value to each PRB (including or excluding Dropped common PRB), where the power corresponding to different Common PRBs is equal, the power corresponding to different Dedicated PRBs is equal, and the power offset value corresponding to Common PRB and Dedicated PRB is Poffset (the power of Dedicated PRB is higher than the power of Common PRB);

[0257] 2) Based on the power corresponding to each Common PRB and the number of Common PRBs, the power on the Common PRB is calculated as P1 [dBm]. Based on the power corresponding to each Dedicated PRB and the number of Dedicated PRBs, the power of the Dedicated PRB is calculated as P2 [dBm].

[0258] 3) The power of the i-th PSFCH transmission is min{P3,P PSFCH,one,i};

[0259] If N is greater than the number threshold value (number threshold), the number threshold value PSFCH transmission is determined based on the transmission index value, wherein, if the total power of the number threshold value PSFCH transmission is less than or equal to the power threshold value, the number of PSFCH transmissions determined is the number threshold value, and the power of the i-th PSFCH transmission is P PSFCH,one,i; If the total power of the number threshold value PSFCH transmissions is greater than the power threshold value, then N1 transmissions are determined based on the transmission index value, where the total power of N1 transmissions is less than or equal to the power threshold value. Further, the determined number of PSFCH transmissions is the maximum value among all N1 that meet the conditions, assuming it is N2, that is, the determined number of PSFCH transmissions is N2. On this basis, among the determined N2 PSFCH transmissions, the power of the i-th PSFCH transmission is min{power threshold value -10log10(N2),P PSFCH,one,i Alternatively, the power of the i-th PSFCH transmission is calculated as follows:

[0260] 1) Allocate the power corresponding to the power threshold to each PRB, where the power corresponding to different common PRBs is equal, the power corresponding to different dedicated PRBs is equal, and the offset value of the power corresponding to the common PRB and the dedicated PRB is Poffset;

[0261] 2) Based on the power corresponding to each Common PRB and the number of Common PRBs, the power on the Common PRB is calculated as P1 [dBm]. Based on the power corresponding to each Dedicated PRB and the number of Dedicated PRBs, the power of the Dedicated PRB is calculated as P2 [dBm].

[0262] 3) The power of the i-th PSFCH transmission is min{P3,P PSFCH,one,i}.

[0263] Method 2:

[0264] (1) Calculate the transmit power of a single transmission based on the number of reference PRBs corresponding to the Common IRB:

[0265] First, calculate the power on a single PRB:

[0266] The power on the Common PRB is calculated using the following formula:

[0267] P PSFCH,one common PRB =P O,PSFCH +10log 10 (2 μ )+α PSFCH PL-P offset [dBm], where P offset Indicates the power offset between Common PRB and Dedicated PRB;

[0268] The power on the dedicated PRB is calculated according to the following formula: PPSFCH, one dedicated PRB = P O,PSFCH +10log 10 (2 μ )+α PSFCH PL [dBm];

[0269] Then, determine the power of a single PSFCH transmission:

[0270] Among them, P PSFCH,one,i,common Indicates the power of a single PSFCH transmission on the Common IRB;

[0271] PPSFCH,one,i,dedicated represents the power of a single PSFCH transmission on the Dedicated PRB;

[0272] Indicates the reference value of the number of PRBs corresponding to the Common IRB occupied by a single PSFCH transmission;

[0273] Represents the Dropped common PRB defined above;

[0274] Indicates the number of dedicated PRBs occupied by a single PSFCH transmission.

[0275] (2) Power control adjustment process:

[0276] Assume that N is the number of scheduled PSFCH transmissions;

[0277] If N is less than or equal to the number threshold (number threshold), and the total power of N transmissions is less than or equal to the power threshold (power threshold), then the number of PSFCH transmissions determined is N; where the total power of N transmissions is The power of the i-th PSFCH transmission is P PSFCH,one,i ;

[0278] If N is less than or equal to the quantity threshold value (quantity threshold value), and the total power of N transmissions is greater than the power threshold value (power threshold value), then N1 transmissions are determined based on the transmission index value, wherein the total power of N1 transmissions is less than or equal to the power threshold value, and the determined number of PSFCH transmissions is the maximum value among all N1s that meet the conditions, assuming it is N2, that is, the determined number of PSFCH transmissions is N2; on this basis, in the determined N2 PSFCH transmissions, the power of the i-th PSFCH transmission is min{power threshold value -10log10(N2),P PSFCH,one,iAlternatively, the power of the i-th PSFCH transmission is calculated as follows:

[0279] 1) Allocate the power corresponding to the power threshold to each PRB, where the power corresponding to different Common PRBs is equal (the number of PRBs corresponding to Common PRBs is ), the powers corresponding to different dedicated PRBs are equal, and the power offset value corresponding to the common PRB and dedicated PRB is Poffset;

[0280] 2) Based on the power corresponding to each Common PRB and the number of Common PRBs, the power on the Common PRB is calculated as P1 [dBm]. Based on the power corresponding to each Dedicated PRB and the number of Dedicated PRBs, the power of the Dedicated PRB is calculated as P2 [dBm].

[0281] 3) The power of the i-th PSFCH transmission is min{P3,P PSFCH,one,i};

[0282] If N is greater than the number threshold value (number threshold), the number threshold value PSFCH transmission is determined based on the transmission index value, wherein, if the total power of the number threshold value PSFCH transmission is less than or equal to the power threshold value, the number of PSFCH transmissions determined is the number threshold value, and the power of the i-th PSFCH transmission is P PSFCH,one,i ; If the total power of the number threshold value PSFCH transmissions is greater than the power threshold value, then N1 transmissions are determined based on the transmission index value, where the total power of N1 transmissions is less than or equal to the power threshold value. Further, the determined number of PSFCH transmissions is the maximum value among all N1 that meet the conditions, assuming it is N2, that is, the determined number of PSFCH transmissions is N2. On this basis, among the determined N2 PSFCH transmissions, the power of the i-th PSFCH transmission is min{power threshold value -10log10(N2),P PSFCH,one,i Alternatively, the power of the i-th PSFCH transmission is calculated as follows:

[0283] 1) Allocate the power corresponding to the power threshold to each PRB, where the power corresponding to different Common PRBs is equal (the number of PRBs corresponding to Common PRBs is )), the powers corresponding to different dedicated PRBs are equal, and the power offset value corresponding to the common PRB and dedicated PRB is Poffset;

[0284] 2) Based on the power corresponding to each Common PRB and the number of Common PRBs, the power on the Common PRB is calculated as P1 [dBm]. Based on the power corresponding to each Dedicated PRB and the number of Dedicated PRBs, the power of the Dedicated PRB is calculated as P2 [dBm].

[0285] 3) The power of the i-th PSFCH transmission is min{P3,P PSFCH,one,i}.

[0286] Method 3:

[0287] (1) Calculate the transmit power of a single transmission based on the reference PRB corresponding to a single PSFCH transmission:

[0288] First, the calculation formula for the theoretical power on a single PRB is as follows (Common PRB and Dedicated PRB are not distinguished here): P PSFCH,one PRB =P O,PSFCH +10log 10 (2 μ )+α PSFCH PL [dBm]

[0289] Then, the power calculation formula for a single PSFCH transmission is as follows:

[0290] in, Indicates the number of reference PRBs corresponding to a single PSFCH transmission, or the number of reference PRBs corresponding to a single IRB in an RB set + the number of dedicated PRBs occupied by a single PSFCH transmission;

[0291] (2) Power control adjustment process:

[0292] Assume that N is the number of scheduled PSFCH transmissions;

[0293] If N is less than or equal to the number threshold (number threshold), and the total power of N transmissions is less than or equal to the power threshold (power threshold), then the number of PSFCH transmissions is determined to be N, where the total power of N transmissions is P PSFCH,one +10log 10 (N Tx,PSFCH), the power of each PSFCH transmission is P PSFCH,one ;

[0294] If N is less than or equal to the number threshold value (number threshold value), and the total power of N transmissions is greater than the power threshold value (power threshold value), then N1 transmissions are determined based on the transmission index value, wherein the total power of N1 transmissions is less than or equal to the power threshold value, and the determined number of PSFCH transmissions is the maximum value among all N1s that meet the conditions, assuming it is N2, that is, the determined number of PSFCH transmissions is N2; on this basis, in the determined N2 PSFCH transmissions, the power of each PSFCH transmission is min{power threshold value -10log10(N2),P PSFCH,one};

[0295] If N is greater than the number threshold (number threshold), the number threshold PSFCH transmission is determined based on the transmission index value. If the total power of the number threshold PSFCH transmission is less than or equal to the power threshold, the number of PSFCH transmissions is determined to be the number threshold, and the power of each PSFCH transmission is P. PSFCH,one ; If the total power of the number threshold value PSFCH transmissions is greater than the power threshold value, then N1 transmissions are determined based on the transmission index value, where the total power of N1 transmissions is less than or equal to the power threshold value. Further, the determined number of PSFCH transmissions is the maximum value among all N1s that meet the conditions, assuming it is N2, that is, the determined number of PSFCH transmissions is N2. On this basis, the determined number of PSFCH transmissions is N2, and the power of each PSFCH transmission is min{power threshold value -10log10(N2),P PSFCH,one}.

[0296] If the resources for PSFCH transmission include dedicated IRBs, the calculated PSFCH transmission power is evenly distributed to each PRB.

[0297] The resources used for PSFCH transmission are: Common IRB + Dedicated PRB, then the calculated PSFCH transmission power is allocated to each PRB, where the power of each RPB (i.e. Common PRB) in each Common IRB is equal, the power of each Dedicated PRB is equal, and the power difference between each Common PRB and Dedicated PRB is P offset (The power of Common PRB is lower than that of Dedicated PRB).

[0298] P in all the above formulas O,PSFCH , μ, α PSFCHand PL are parameters configured by the high-level configuration. PSFCH When α PSFCH 1. For the definition and configuration of related parameters, refer to 3GPP TS 38.213.

[0299] 2. For out-of-coverage situations (no high-layer parameter dl-P0-PSFCH)

[0300] The UE (first terminal) determines the number of times N is sent, where N is greater than or equal to 1, or N is greater than or equal to 1 and N is less than or equal to the quantity threshold. Specifically:

[0301] 1. If the resources transmitted by PSFCH include Dedicated IRB, then:

[0302] Mode 1: The power of any PSFCH transmission is: P CMAX -10log 10 (N)[dBm];

[0303] Mode 2: The power of the i-th PSFCH transmission is: power threshold - 10log10 (the total number of PRBs occupied by N PSFCH transmissions) + 10log10 (the number of PRBs occupied by the i-th PSFCH transmission);

[0304] 2. If the resources transmitted by PSFCH include Common IRB+Dedicated PRB, then:

[0305] Mode 1: The power of any PSFCH transmission is: P CMAX -10log 10 (N)[dBm];

[0306] Method 2: The process of determining the power of the i-th PSFCH transmission includes:

[0307] 1) Allocate the power corresponding to the power threshold to each PRB, where the power corresponding to different Common PRBs is equal (the number of PRBs corresponding to Common PRBs is Or the number of PRBs corresponding to the Common PRB is the number of common PRBs actually occupied (i.e., excluding the dropped common PRBs), the powers corresponding to different Dedicated PRBs are equal, and the offset value of the powers corresponding to the Common PRB and the Dedicated PRB is Poffset;

[0308] 2) Based on the power corresponding to each Common PRB and the number of Common PRBs, calculate the power on the Common PRB as P1 [dBm]. Based on the power corresponding to each Dedicated PRB and the number of Dedicated PRBs, calculate the power of the Dedicated PRB as P2 [dBm].

[0309] 3) Determine the power of the i-th PSFCH transmission as

[0310] Mode 3: The process of determining the power of the i-th PSFCH transmission includes:

[0311] 1) Allocate the power corresponding to the power threshold value to each PRB, where the power corresponding to different Common PRBs is equal (the number of PRBs corresponding to the Common PRB is the reference value of the number of PRBs corresponding to a single IRB, or the number of PRBs corresponding to the Common PRB is the reference value of the number of PRBs corresponding to a single IRB), the power corresponding to different Dedicated PRBs is equal, and the offset value of the power corresponding to the Common PRB and the Dedicated PRB is Poffset;

[0312] 2) Based on the power corresponding to each common PRB and the number of common PRBs, the power on the common PRB is calculated as P1. Based on the power corresponding to each dedicated PRB and the number of dedicated PRBs, the power of the dedicated PRB is calculated as P2.

[0313] 3) Determine the power of the i-th PSFCH transmission as

[0314] In the direct link transmission method of the embodiment of the present application, the indication of the RB set is achieved by designing the content carried in the coordination request information and the coordination information; by determining the resources for multiple PSFCH transmissions based on the conflicting resources or the SCI related thereto, and controlling the power / quantity of the PSFCH transmissions, the direct link transmission method can be applied to the modified definition of the HARQ RTT; in this way, the IUC can be applied to the SL-U with changed structure and characteristics.

[0315] As shown in FIG2 , an embodiment of the present application further provides a direct link transmission method, which is applied to a second terminal and includes step 202, wherein step 202 includes at least one of the following:

[0316] Receiving first-type coordination information transmitted by the first terminal; here, before receiving the first coordination information, the second terminal should have sent a PSSCH to the first terminal;

[0317] receiving a PSFCH transmitted by the first terminal, wherein the PSFCH transmission performed by the first terminal includes at least one of the following:

[0318] The first type of PSFCH transmission is used to carry HARQ-ACK information;

[0319] The second type of PSFCH transmission is used to carry the second type of coordination information; wherein the second type of coordination information is conflict information;

[0320] The third type of PSFCH transmission is used to avoid COT interruption.

[0321] In the direct link transmission method of an embodiment of the present application, a second terminal receives first-type coordination information transmitted by a first terminal; and / or receives a PSFCH transmitted by the first terminal, wherein the PSFCH transmission includes at least one of the following: a first-type PSFCH transmission for carrying HARQ-ACK information; a second-type PSFCH transmission for carrying second-type coordination information; wherein the second-type coordination information is conflict information; and a third-type PSFCH transmission for avoiding COT. In this way, the second terminal can select a transmission resource based on the first-type coordination information sent by the first terminal and / or the information carried by the PSFCH transmission, so that the transmission resource selected by the second terminal is suitable for the first terminal and / or does not conflict with resources selected by other terminals, thereby improving the reliability of system data transmission.

[0322] Furthermore, as an optional implementation, the method further includes:

[0323] Sending coordination request information to the first terminal; wherein the coordination request information includes at least one of the following:

[0324] The number of resource block sets (RB sets) is used to indicate the number of RB sets occupied by PSCCH and / or PSSCH transmissions.

[0325] First RB set information, used to indicate a candidate RB set available for PSCCH and / or PSSCH transmission;

[0326] Second RB set information, used to indicate an RB set in which the second terminal detects a continuous listen-before-talk C-LBT failure;

[0327] The first sub-channel number is used to indicate the number of sub-channels occupied by PSCCH and / or PSSCH transmission in all occupied RB sets;

[0328] The second sub-channel number is used to indicate the number of sub-channels occupied by PSCCH and / or PSSCH transmission in one RB set;

[0329] Resource reservation cycle;

[0330] The start time of the resource selection window;

[0331] The deadline for the resource selection window;

[0332] The resource set type is used to indicate the type of resource set expected to be provided by the first terminal, wherein the type of resource set includes and / or non-expected resource sets.

[0333] As another optional implementation, the first type of coordination information includes at least one of the following:

[0334] A resource combination information set, used to indicate time-frequency information of resources corresponding to at least one resource combination provided by the first terminal;

[0335] A position of a reference time slot, used to indicate a position of a time slot where a first resource in a first resource combination in the at least one resource combination is located;

[0336] a position indication of a first resource, used to indicate an offset value of a time slot where a first resource in each resource combination other than the first resource combination in the at least one resource combination is located relative to the reference time slot;

[0337] A resource set type, used to indicate the type of a resource set provided by the first terminal, wherein the type of the resource set includes a preferred resource set (Preferred resource set) and / or a non-preferred resource set (Non-preferred resource set);

[0338] A lowest subchannel indication, used to indicate a subchannel with a smallest index corresponding to the first resource in each resource combination in the at least one resource combination provided by the first terminal;

[0339] The lowest RB set indication is used to indicate the RB set with the smallest index corresponding to the first resource in each resource combination in the at least one resource combination provided by the first terminal.

[0340] Specifically, each resource combination information in the resource combination information set includes at least one of the following:

[0341] The time domain resource indication value TRIV is used to indicate the time domain information corresponding to the resources in the resource combination;

[0342] A first frequency domain resource indication value FRIV is used to indicate subchannel information corresponding to a resource in the resource combination;

[0343] The second FRIV is used to indicate RB set information corresponding to the resources in the resource combination.

[0344] The embodiment of the present application further provides a direct link transmission device, which is applied to a first terminal. As shown in FIG6 , the device includes:

[0345] An execution module 601 is configured to perform at least one of the following:

[0346] Perform the first type of coordinated information transmission;

[0347] Perform PSFCH transmission; wherein the PSFCH transmission includes at least one of the following:

[0348] The first type of PSFCH transmission is used to carry HARQ-ACK information;

[0349] The second type of PSFCH transmission is used to carry the second type of coordination information; wherein the second type of coordination information is conflict information;

[0350] The third type of PSFCH transmission is used to avoid COT interruption.

[0351] Furthermore, the device further comprises:

[0352] A receiving module is configured to receive coordination request information sent by the second terminal; wherein the coordination request information includes at least one of the following:

[0353] The number of resource block sets (RB sets) is used to indicate the number of RB sets occupied by the transmission of the physical direct link control channel (PSCCH) and / or the physical direct link shared channel (PSSCH);

[0354] First RB set information, used to indicate a candidate RB set available for PSCCH and / or PSSCH transmission;

[0355] Second RB set information, used to indicate an RB set in which the second terminal detects a continuous listen-before-talk C-LBT failure;

[0356] The first sub-channel number is used to indicate the number of sub-channels occupied by PSCCH and / or PSSCH transmission in all occupied RB sets;

[0357] Resource reservation cycle;

[0358] The start time of the resource selection window;

[0359] The deadline for the resource selection window;

[0360] The resource set type is used to indicate the type of resource set that the first terminal is expected to provide, wherein the type of resource set includes an expected resource set and / or an unexpected resource set.

[0361] Optionally, the first type of coordination information includes at least one of the following:

[0362] A resource combination information set, used to indicate time-frequency information of resources corresponding to at least one resource combination provided by the first terminal;

[0363] A position of a reference time slot, used to indicate a position of a time slot where a first resource in a first resource combination in the at least one resource combination is located;

[0364] a position indication of a first resource, used to indicate an offset value of a time slot where a first resource in each resource combination other than the first resource combination in the at least one resource combination is located relative to the reference time slot;

[0365] A resource set type, used to indicate the type of the resource set provided by the first terminal, wherein the type of the resource set includes an expected resource set and / or an unexpecting resource set;

[0366] A lowest subchannel indication, used to indicate a subchannel with a smallest index corresponding to the first resource in each resource combination in the at least one resource combination provided by the first terminal;

[0367] The lowest RB set indication is used to indicate the RB set with the smallest index corresponding to the first resource in each resource combination in the at least one resource combination provided by the first terminal.

[0368] Specifically, each resource combination information in the resource combination information set includes at least one of the following:

[0369] The time domain resource indication value TRIV is used to indicate the time domain information corresponding to the resources in the resource combination;

[0370] A first frequency domain resource indication value FRIV is used to indicate subchannel information corresponding to a resource in the resource combination;

[0371] The second FRIV is used to indicate RB set information corresponding to the resources in the resource combination.

[0372] Optionally, the device further comprises:

[0373] A first determining module is configured to determine one or more resources for second-type PSFCH transmission based on PSCCH and / or PSSCH transmission resources reserved by the second terminal and having resource conflict; or

[0374] The second determination module is used to determine one or more resources for second-type PSFCH transmission based on the time-frequency resources where the direct link control information SCI sent by the second terminal is located, wherein the PSCCH and / or PSSCH transmission resources indicated by the SCI are detected by the first terminal as a resource conflict.

[0375] Optionally, the determined one or more resources for second-type PSFCH transmission meet at least one of the following conditions:

[0376] The time domain interval between any two adjacent time slots where resources for the second type of PSFCH transmission are located is the PSFCH resource period;

[0377] Any first time slot in which resources for second-type PSFCH transmission are located is located before the second time slot in which PSCCH and / or PSSCH transmission resources reserved by the second terminal and in which resource conflict occurs, and the number of time slots between any one of the first time slots and the second time slot is greater than or equal to the first value;

[0378] Any one of the first time slots is located after the third time slot where the SCI is located, and the number of time slots between any one of the first time slots and the third time slot is greater than or equal to a second value.

[0379] Optionally, the device further includes a second determining module, configured to:

[0380] Determine a first PSFCH transmission that can be performed by the first terminal based on at least one transmission index value of at least one PSFCH transmission performed by the first terminal as needed, power of the at least one PSFCH transmission, number of the at least one PSFCH transmission, a power threshold, and a number threshold; wherein the transmission index value is related to a category of the PSFCH transmission and / or a priority of the PSFCH transmission, and the first PSFCH transmission satisfies at least one of the following:

[0381] The total power of the first PSFCH transmission is less than or equal to the power threshold;

[0382] The number of the first PSFCH transmissions is less than or equal to the number threshold;

[0383] The number of the first PSFCH transmissions is greater than or equal to a third value.

[0384] Optionally, the index value of the first type of PSFCH transmission is smaller than the index value of the second type of PSFCH transmission, and the index value of the second type of PSFCH transmission is smaller than the index value of the third type of PSFCH transmission.

[0385] It should be noted that the direct link transmission device provided in the embodiment of the present application can implement all the method steps implemented in the direct link transmission method embodiment applied to the first terminal, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0386] The embodiment of the present application further provides a direct link transmission device, which is applied to a second terminal. As shown in FIG7 , the device includes a receiving module 701, which is configured to perform at least one of the following:

[0387] receiving first-type coordination information transmitted by a first terminal;

[0388] receiving a PSFCH transmitted by the first terminal, wherein the PSFCH transmission performed by the first terminal includes at least one of the following:

[0389] The first type of PSFCH transmission is used to carry HARQ-ACK information;

[0390] The second type of PSFCH transmission is used to carry the second type of coordination information; wherein the second type of coordination information is conflict information;

[0391] The third type of PSFCH transmission is used to avoid COT interruption.

[0392] Furthermore, the device further comprises:

[0393] A sending module is configured to send coordination request information to the first terminal; wherein the coordination request information includes at least one of the following:

[0394] The number of resource block sets (RB sets) is used to indicate the number of RB sets occupied by PSCCH and / or PSSCH transmissions.

[0395] First RB set information, used to indicate a candidate RB set available for PSCCH and / or PSSCH transmission;

[0396] Second RB set information, used to indicate an RB set in which the second terminal detects a continuous listen-before-talk C-LBT failure;

[0397] The first sub-channel number is used to indicate the number of sub-channels occupied by PSCCH and / or PSSCH transmission in all occupied RB sets;

[0398] Resource reservation cycle;

[0399] The start time of the resource selection window;

[0400] The deadline for the resource selection window;

[0401] The resource set type is used to indicate the type of resource set expected to be provided by the first terminal, wherein the type of resource set includes and / or non-expected resource sets.

[0402] Optionally, the first type of coordination information includes at least one of the following:

[0403] A resource combination information set, used to indicate time-frequency information of resources corresponding to at least one resource combination provided by the first terminal;

[0404] A position of a reference time slot, used to indicate a position of a time slot where a first resource in a first resource combination in the at least one resource combination is located;

[0405] a position indication of a first resource, used to indicate an offset value of a time slot where a first resource in each resource combination other than the first resource combination in the at least one resource combination is located relative to the reference time slot;

[0406] A resource set type, used to indicate the type of a resource set provided by the first terminal, wherein the type of the resource set includes a preferred resource set (Preferred resource set) and / or a non-preferred resource set (Non-preferred resource set);

[0407] A lowest subchannel indication, used to indicate a subchannel with a smallest index corresponding to the first resource in each resource combination in the at least one resource combination provided by the first terminal;

[0408] The lowest RB set indication is used to indicate the RB set with the smallest index corresponding to the first resource in each resource combination in the at least one resource combination provided by the first terminal.

[0409] Specifically, each resource combination information in the resource combination information set includes at least one of the following:

[0410] The time domain resource indication value TRIV is used to indicate the time domain information corresponding to the resources in the resource combination;

[0411] A first frequency domain resource indication value FRIV is used to indicate subchannel information corresponding to a resource in the resource combination;

[0412] The second FRIV is used to indicate RB set information corresponding to the resources in the resource combination.

[0413] It should be noted that the above-mentioned direct link transmission device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned direct link transmission method embodiment applied to the second terminal, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0414] An embodiment of the present application also provides a terminal, including a transceiver 810, a processor 800, a memory 820, and a program or instruction stored on the memory 820 and executable on the processor 800; when the processor 800 executes the program or instruction, the direct link transmission method applied to the first terminal or the direct link transmission method applied to the second terminal is implemented.

[0415] The transceiver 810 is configured to receive and send data under the control of the processor 800 .

[0416] In FIG8 , the bus architecture may include any number of interconnected buses and bridges, specifically various circuits of one or more processors represented by processor 800 and memory represented by memory 820, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 810 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. For different terminals, the user interface 830 may also be an interface capable of connecting external or internal devices as required, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0417] The processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 1300 when performing operations.

[0418] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or may be accomplished by instructing relevant hardware through a computer program, wherein the computer program includes instructions for executing part or all of the steps of the above method; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.

[0419] In addition, an embodiment of the present application further provides a readable storage medium having a program stored thereon. When the program is executed by a processor, the various processes of the embodiment of the direct link transmission method described above are implemented, and the same technical effects are achieved. To avoid repetition, the details are not described here. The readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0420] In addition, it should be noted that, in the apparatus and method of the present application, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present application. Moreover, the steps of performing the above-mentioned series of processes can naturally be performed in the order of description or in chronological order, but do not necessarily need to be performed in chronological order, and some steps can be performed in parallel or independently of each other. For those of ordinary skill in the art, it will be understood that all or any steps or components of the method and apparatus of the present application can be implemented in any computing device (including processors, storage media, etc.) or a network of computing devices with hardware, firmware, software or a combination thereof, which can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of the present application.

[0421] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, 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 the element.

[0422] The above is an optional implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A through link transmission method, applied to a first terminal, the method comprising at least one of the following: Perform the first type of coordinated information transmission; Perform physical direct link feedback channel PSFCH transmission; wherein, PSFCH transmission includes at least one of the following: The first type of PSFCH transmission is used to carry hybrid automatic repeat request confirmation HARQ-ACK information; The second type of PSFCH transmission is used to carry the second type of coordination information; wherein the second type of coordination information is conflict information; The third type of PSFCH transmission is used to avoid channel occupation time COT interruption.

2. The method according to claim 1, wherein: The method further comprises: Receive coordination request information sent by the second terminal; wherein the coordination request information includes at least one of the following: The number of resource block sets (RB sets) is used to indicate the number of RB sets occupied by the transmission of the physical direct link control channel (PSCCH) and / or the physical direct link shared channel (PSSCH); First RB set information, used to indicate a candidate RB set available for PSCCH and / or PSSCH transmission; Second RB set information, used to indicate that the second terminal detects an RB set in which continuous listen-before-talk C-LBT fails; The first sub-channel number is used to indicate the number of sub-channels occupied by PSCCH and / or PSSCH transmission in all occupied RB sets; Resource reservation cycle; The start time of the resource selection window; The deadline of the resource selection window; The resource set type is used to indicate the type of resource set that the first terminal is expected to provide, wherein the type of resource set includes an expected resource set and / or an unexpected resource set.

3. The method according to claim 1 or 2, wherein: The first type of coordination information includes at least one of the following: A resource combination information set, used to indicate time-frequency information of resources corresponding to at least one resource combination; The position of the reference time slot is used to indicate the position of the time slot where the first resource in the first resource combination in the at least one resource combination is located; a position indication of a first resource, used to indicate an offset value of a time slot where a first resource in each resource combination other than the first resource combination in the at least one resource combination is located relative to the reference time slot; A resource set type, used to indicate the type of a resource set provided by the first terminal, wherein the type of the resource set includes an expected resource set and / or an undesired resource set; A minimum subchannel indication, used to indicate a subchannel with a minimum index corresponding to the first resource in each resource combination in the at least one resource combination provided by the first terminal; The lowest RB set indication is used to indicate the RB set with the smallest index corresponding to the first resource in each resource combination in the at least one resource combination provided by the first terminal.

4. The method according to claim 3, wherein: Each resource combination information in the resource combination information set includes at least one of the following: The time domain resource indication value TRIV is used to indicate the time domain information corresponding to the resources in the resource combination; A first frequency domain resource indication value FRIV is used to indicate sub-channel information corresponding to a resource in the resource combination; The second FRIV is used to indicate RB set information corresponding to the resources in the resource combination.

5. The method according to claim 1, wherein: The method further comprises: Determine one or more resources for second-type PSFCH transmission according to the PSCCH and / or PSSCH transmission resources reserved by the second terminal and having resource conflict; or, One or more resources for second-type PSFCH transmission are determined according to the time-frequency resources where the direct link control information SCI sent by the second terminal is located, wherein the PSCCH and / or PSSCH transmission resources indicated by the SCI are detected by the first terminal as causing resource conflict.

6. The method according to claim 5, wherein: The one or more resources determined for second-type PSFCH transmission satisfy at least one of the following: The time domain interval between any two adjacent time slots where resources for the second type of PSFCH transmission are located is the PSFCH resource period; Any first time slot where resources for the second type of PSFCH transmission are located is located in the second time slot where PSCCH and / or PSSCH transmission resources reserved by the second terminal and where resource conflict occurs Before, and the number of time slots between any one of the first time slots and the second time slot is greater than or equal to a first value; Any one of the first time slots is located after the third time slot where the SCI is located, and the number of time slots between any one of the first time slots and the third time slot is greater than or equal to a second value.

7. The method according to claim 1, wherein: The method further comprises: Determine a first PSFCH transmission that can be performed by the first terminal according to at least one transmission index value of at least one PSFCH transmission performed by the first terminal as needed, the power of the at least one PSFCH transmission, the number of the at least one PSFCH transmission, a power threshold, and a number threshold; wherein the transmission index value is related to the category of the PSFCH transmission and / or the priority of the PSFCH transmission, and the first PSFCH transmission satisfies at least one of the following: The total power of the first PSFCH transmission is less than or equal to the power threshold; The number of the first PSFCH transmissions is less than or equal to the number threshold; The number of the first PSFCH transmissions is greater than or equal to a third value.

8. The method according to claim 7, wherein: The index value of the first type of PSFCH transmission is smaller than the index value of the second type of PSFCH transmission, and the index value of the second type of PSFCH transmission is smaller than the index value of the third type of PSFCH transmission.

9. A through link transmission method, applied to a second terminal, the method comprising at least one of the following: Receiving first type of coordination information transmitted by a first terminal; receiving a PSFCH transmitted by the first terminal, wherein: The PSFCH transmission performed by the first terminal includes at least one of the following: The first type of PSFCH transmission is used to carry HARQ-ACK information; The second type of PSFCH transmission is used to carry the second type of coordination information; wherein the second type of coordination information is conflict information; The third type of PSFCH transmission is used to avoid COT interruption.

10. The method according to claim 9, wherein: The method further comprises: Sending coordination request information to the first terminal; wherein the coordination request information includes at least one of the following: The number of resource block sets (RB sets), used to indicate the RBs occupied by PSCCH and / or PSSCH transmissions The number of sets; First RB set information, used to indicate a candidate RB set available for PSCCH and / or PSSCH transmission; Second RB set information, used to indicate that the second terminal detects an RB set in which continuous listen-before-talk C-LBT fails; The first sub-channel number is used to indicate the number of sub-channels occupied by PSCCH and / or PSSCH transmission in all occupied RB sets; Resource reservation cycle; The start time of the resource selection window; The deadline of the resource selection window; The resource set type is used to indicate the type of resource set expected to be provided by the first terminal, wherein the type of resource set includes and / or non-expected resource set.

11. A direct link transmission device, applied to a first terminal, the direct link transmission device comprising: An execution module, wherein the execution module is used for at least one of the following: Perform the first type of coordinated information transmission; Perform PSFCH transmission; wherein the PSFCH transmission includes at least one of the following: The first type of PSFCH transmission is used to carry HARQ-ACK information; The second type of PSFCH transmission is used to carry the second type of coordination information; wherein the second type of coordination information is conflict information; The third type of PSFCH transmission is used to avoid COT interruption.

12. A direct link transmission device, applied to a second terminal, the direct link transmission device comprising a receiving module, the receiving module being used for at least one of the following: Receiving first type of coordination information transmitted by a first terminal; receiving a PSFCH transmitted by the first terminal, wherein: The PSFCH transmission performed by the first terminal includes at least one of the following: The first type of PSFCH transmission is used to carry HARQ-ACK information; The second type of PSFCH transmission is used to carry the second type of coordination information; wherein the second type of coordination information is conflict information; The third type of PSFCH transmission is used to avoid COT interruption.

13. A terminal, comprising a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, wherein when the processor executes the computer program, the direct link transmission method according to any one of claims 1 to 8 is implemented, or the direct link transmission method according to any one of claims 9 to 10 is implemented.

14. A readable storage medium having a program stored thereon, wherein when the program is executed by a processor, the direct link transmission method according to any one of claims 1 to 8 or the direct link transmission method according to any one of claims 9 to 10 is implemented.

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