Method, apparatus and terminal for resource selection of sidelink

Abstract

The application discloses a sidelink resource selection method and device and a terminal, and relates to the technical field of communication. The method comprises the following steps: acquiring configured or preconfigured resource pool configuration information, wherein the resource pool configuration information comprises frequency domain resource configuration information and / or subchannel configuration information, and the subchannel comprises an interlace resource block (IRB). In this way, when resource selection is performed in a resource pool configured based on the resource pool configuration information, the selected resource can meet the restriction requirements of an occupied channel bandwidth (OCB) and a power spectral density (PSD), so that a complete implementation scheme of a resource selection mechanism of a sidelink working in an unlicensed frequency band can be formed.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a method, apparatus and terminal for selecting resources for a direct link. Background Technology

[0002] Terminal devices operating in unlicensed spectrum need to meet limitations on occupied channel bandwidth (OCB) and power spectral density (PSD). Therefore, the New Radio on Unlicensed Spectrum (NR-U) interface, operating in unlicensed spectrum, introduces the Interlaced Resource Block (IRB) structure. Currently, IRB is also a candidate solution in discussions of Sidelink on Unlicensed Spectrum (SL-U) mechanisms operating in unlicensed spectrum; however, a complete implementation scheme is not yet available. Summary of the Invention

[0003] The purpose of this application is to provide a resource selection method, device and terminal for direct links, thereby solving the problem that there is no complete implementation scheme for the direct link mechanism currently operating in unlicensed frequency bands.

[0004] Firstly, in order to achieve the above objectives, embodiments of this application provide a resource selection method for a direct link, including:

[0005] Obtain configured or pre-configured resource pool configuration information, which includes frequency domain resource configuration information and / or sub-channel configuration information, wherein the sub-channel includes comb-shaped resource blocks (IRBs).

[0006] Optionally, the configuration information of the sub-channel includes at least one of the following:

[0007] Sub-channel indication information;

[0008] The correspondence between sub-channels and IRBs;

[0009] The size of the sub-channel.

[0010] Optionally, the correspondence between the sub-channels and the IRB includes at least one of the following:

[0011] A subchannel corresponds to N consecutive IRBs located in the same resource pool, wherein the resource pool is a resource pool configured according to the resource pool configuration information;

[0012] A subchannel corresponds to N consecutive IRBs located within the same resource block set;

[0013] Where N is a positive integer representing configuration or pre-configuration.

[0014] Optionally, when the N consecutive IRBs are located within the same resource pool, the indication information of the sub-channel includes any of the following:

[0015] The index of the starting IRB and the number of IRBs in the N consecutive IRBs;

[0016] The index of all IRBs in the N consecutive IRBs.

[0017] Optionally, when the N consecutive IRBs are located in the same resource block set, the indication information of the sub-channel includes at least one of the following:

[0018] The index of the same set of resource blocks;

[0019] The index of the starting IRB among the N consecutive IRBs;

[0020] The number of IRBs;

[0021] The index of all IRBs in the N consecutive IRBs.

[0022] Optionally, the size of the sub-channel includes any of the following:

[0023] The resource pool supports sub-channels of different sizes;

[0024] The resource pool only supports sub-channels of the same size.

[0025] Optionally, when the resource pool supports sub-channels of different sizes, the physical resource blocks (PRBs) contained in the sub-channel are all PRBs located outside the guard band from N consecutive IRBs; or,

[0026] When the resource pool supports sub-channels of the same size, the sub-channel contains all PRBs located outside the guard band and remaining resource blocks (RBs) from N consecutive IRBs; or,

[0027] When the resource pool supports sub-channels of the same size, the sub-channel contains all the PRBs from N consecutive IRBs.

[0028] Optionally, the method further includes:

[0029] The transport block size is determined based on the pre-agreed sub-channel size; or,

[0030] The size of the transmission block is determined based on whether the guard band is used for transmission; or...

[0031] The transport block size is determined based on the frequency domain resources used in the actual transmission.

[0032] Optionally, the frequency domain resource configuration information includes at least one of the following:

[0033] The initial IRB index of the resource pool;

[0034] The initial PRB index of the resource pool;

[0035] The number of sub-channels;

[0036] The number of IRBs contained in the sub-channel;

[0037] Remaining resource block configuration information.

[0038] Secondly, in order to achieve the above objectives, embodiments of this application also provide a resource selection method for a direct link, including:

[0039] Select the first resource from the resource pool for transmitting the Physical Cut-Through Control Channel (PSCCH) and the Physical Cut-Through Shared Channel (PSSCH); and / or,

[0040] Select a second resource from the resource pool for transmitting the Physical Through Link Feedback Channel (PSFCH).

[0041] Optionally, a first resource is selected from the resource pool for transmitting the Physical Cut-Through Control Channel (PSCCH) and the Physical Cut-Through Shared Channel (PSSCH), including:

[0042] The first resource is selected first within the same LBT subband.

[0043] Optionally, the method further includes:

[0044] If the first resource cannot be selected within the same LBT subband, then the first resource is selected from among the multiple LBT subbands in the resource pool.

[0045] Optionally, a first resource is selected from the resource pool for transmitting the Physical Cut-Through Control Channel (PSCCH) and the Physical Cut-Through Shared Channel (PSSCH), including:

[0046] Based on the resource exclusion results, determine the available resource set for each LBT subband;

[0047] Select the first resource from any of the available resource sets.

[0048] Optionally, the method further includes:

[0049] If the first resource cannot be selected in any of the available resource sets, then the first resource is selected from at least two of the available resource sets.

[0050] Optionally, a second resource is selected from the resource pool for transmitting the Physical Through Link Feedback Channel (PSFCH), including:

[0051] When the PSSCH corresponding to the PSFCH is located in multiple LBT subbands, and the second resource is mapped to multiple LBT subbands simultaneously, the selection of the second resource includes any of the following:

[0052] The second resource is selected based on the time slot index of the PSSCH corresponding to the PSFCH and the index of the starting sub-channel;

[0053] The second resource is selected based on the time slot index of the PSSCH corresponding to the PSFCH and the index of the sub-channel corresponding to the first resource in each LBT sub-band.

[0054] Optionally, the starting sub-channel is the starting sub-channel in the resource pool of the first resource, or the starting sub-channel is the starting sub-channel in each of the LBT sub-bands of the first resource.

[0055] Optionally, the method further includes:

[0056] Sending Phase 1 Cut-Through Link Control Information (SCI), the Phase 1 SCI includes a first indication field, which indicates the LBT subband where the PSCCH and PSSCH are located using at least one of the following methods:

[0057] P*log2(M), where P is the maximum number of SCI resources that can be reserved in the configuration or pre-configuration, and M is the number of LBT subbands contained in the first resource pool;

[0058] The bitmap method requires P*M bits.

[0059] The method of joint encoding.

[0060] Optionally, the resource pool is a resource pool configured according to the resource pool configuration information in the direct link resource selection method as described in the first aspect.

[0061] Thirdly, in order to achieve the above objectives, embodiments of this application also provide a resource selection device for a direct link, comprising:

[0062] The acquisition module is used to acquire configured or pre-configured resource pool configuration information, which includes frequency domain resource configuration information and / or sub-channel configuration information, wherein the sub-channel includes comb-shaped resource blocks (IRBs).

[0063] Fourthly, in order to achieve the above objectives, embodiments of this application also provide a resource selection device for a direct link, including a selection module, used for:

[0064] Select the first resource from the resource pool for transmitting the Physical Cut-Through Control Channel (PSCCH) and the Physical Cut-Through Shared Channel (PSSCH); and / or,

[0065] Select a second resource from the resource pool for transmitting the Physical Through Link Feedback Channel (PSFCH).

[0066] Fifthly, in order to achieve the above objectives, embodiments of this application also provide a terminal, including a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, it implements the resource selection method for a pass-through link as described in the first aspect, or the resource selection method for a pass-through link as described in the second aspect.

[0067] Sixthly, to achieve the above objectives, embodiments of this application also provide a readable storage medium storing a program or instructions thereon, which, when executed by a processor, implements the resource selection method for a pass-through link as described in the first aspect, or the resource selection method for a pass-through link as described in the second aspect. The above technical solutions of this application have at least the following beneficial effects:

[0068] The resource selection method for direct links in this application embodiment obtains configured or pre-configured resource pool configuration information, which includes frequency domain resource configuration information and / or sub-channel configuration information, wherein the sub-channels include comb-shaped resource blocks (IRBs). This ensures that the sub-channels in the resource pool configured based on the resource pool configuration information include spaced IRBs. Therefore, the resources selected during resource selection can meet the limitations of channel occupied bandwidth (OCB) and power spectral density (PSD), thus enabling a complete implementation scheme for the resource selection mechanism of direct links operating in unlicensed frequency bands. Attached Figure Description

[0069] Figure 1 This is a schematic diagram of frequency domain resource allocation for a resource pool in the prior art;

[0070] Figure 2 This is a diagram illustrating the correspondence between the IRB index and the PRB index in NR-U.

[0071] Figure 3This is one of the flowcharts illustrating the resource selection method for a direct link according to an embodiment of this application;

[0072] Figure 4 This is a second flowchart illustrating the resource selection method for a direct link according to an embodiment of this application.

[0073] Figure 5 This is a schematic diagram illustrating the definition of sub-channels in an embodiment of this application;

[0074] Figure 6 This is a schematic diagram of the sub-channel index according to an embodiment of this application;

[0075] Figure 7 This is a schematic diagram of the sub-channel size according to an embodiment of this application;

[0076] Figure 8 This is a schematic diagram illustrating resource selection for multiple subbands according to an embodiment of this application;

[0077] Figure 9A This is one of the schematic diagrams illustrating the mapping relationship between PSSCH resources and PSFCH resources in an embodiment of this application;

[0078] Figure 9B This is the second schematic diagram illustrating the mapping relationship between PSSCH and PSFCH resources in an embodiment of this application.

[0079] Figure 9C This is the third schematic diagram illustrating the mapping relationship between PSSCH and PSFCH resources in an embodiment of this application.

[0080] Figure 10 This is one of the structural schematic diagrams of a resource selection device for a direct link according to an embodiment of this application;

[0081] Figure 11 This is a second schematic diagram of the resource selection device for a direct link according to an embodiment of this application;

[0082] Figure 12 This is a schematic diagram of the terminal structure according to an embodiment of this application. Detailed Implementation

[0083] To make the technical problems, technical solutions, and advantages of this application clearer, a detailed description will be provided below in conjunction with the accompanying drawings and specific embodiments. In the following description, specific details such as particular configurations and components are provided merely to aid in a comprehensive understanding of the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Furthermore, for clarity and brevity, descriptions of known functions and structures have been omitted.

[0084] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0085] In the various embodiments of this application, it should be understood that the sequence number of each process described below does not imply 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 this application.

[0086] In the embodiments provided in this application, 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 solely based on A; B can also be determined based on A and / or other information.

[0087] In describing the embodiments of this application, some concepts used in the following description will first be explained.

[0088] I. Unlicensed frequency bands

[0089] Unlicensed spectrum can be used for free without application and is available to any group or individual. For example, commonly used technologies such as Wi-Fi and Bluetooth use unlicensed frequency bands. To avoid interference between different systems, it is necessary to minimize interference with other systems when using unlicensed frequency bands. Therefore, Listen Before Talk (LBT) technology was introduced, which listens for channel activity before accessing the system and only allows access when the system is found to be idle.

[0090] Terminal devices operating in unlicensed frequency bands need to meet an 80% Occupied Channel Bandwidth (OCB) requirement. To further clarify, this 80% OCB requirement is based on a 20MHz LBT subband. For example, if the total bandwidth is 20MHz (one LBT subband), the terminal transmission needs to meet the 80% OCB requirement. If the total bandwidth is 40MHz (two LBT subbands), and the terminal transmission is located in the upper or lower LBT subband, the occupied bandwidth must be greater than or equal to 80% of the corresponding LBT subband (i.e., 80% of 20MHz). If the terminal transmission spans two LBT subbands, the occupancy of each corresponding LBT subband must meet the 80% requirement. In short, regardless of the number of LBT subbands occupied by the terminal transmission, the occupancy of each LBT subband must meet the 80% requirement.

[0091] II. R16 NR-V2X Frequency Domain Resource Configuration

[0092] The parameters related to the frequency domain resource configuration of the resource pool are as follows:

[0093]

[0094] Table 1

[0095] In the Release 16 (R16) phase, the resource pool for New Radio-Vehicle to everything (NR-V2X) only supports consecutive PRBs in the frequency domain. If the PRBs allocated to the resource pool are not integer multiples of the sub-channel size, in order to reduce excessive modifications to established conclusions, it is decided not to use redundant PRBs.

[0096] like Figure 1 As shown, assuming there are 58 PRBs in the frequency domain, and each sub-channel includes 10 consecutive PRBs, there are a total of 5 sub-channels and 8 Remaining RBs in the frequency domain. The starting PRB index of sub-channel 1 is 4 (the index of the lowest PRB in the resource pool is 0). The resources available for transmission in this resource pool are sub-channels 1-5, while the 4 Remaining RBs on the top and bottom sides cannot be used for transmission. The resources used for device transmission can only be consecutive sub-channels (e.g., ...). Figure 1 Terminal transmission occupies subchannels #2 and #3.

[0097] III. IRB

[0098] In the NR-U system, considering regulatory requirements, an IRB (Intermediate Resource Block) design is introduced, where two consecutive available resource blocks are spaced M resource blocks apart. For an IRB index m, its included PRBs are {m, m+M, m+2M, m+3M, ...}, where m ∈ {0, 1, ..., M-1}, meaning an IRB comprises multiple PRBs with an interval of M. In the NR-U system, IRB structures are defined for 15kHz and 30kHz subcarrier intervals, as shown in the table below:

[0099] 0 15kHz 10 1 30kHz 5

[0100] Table 2

[0101] For example Figure 2 As shown, for IRB#0, it includes PRB#0, PRB#5, PRB#10, and PRB#15; for IRB#1, it includes PRB#1, PRB#6, PRB#11, and PRB#16, and so on. Terminal transmission resources are all granular at the IRB level; for example, terminal transmission may occupy IRB#1 or IRB#1 + IRB#2.

[0102] Therefore, if the UE needs to occupy 4 PRBs, if continuous PRB occupancy is adopted (assuming PRB#0-PRB#3), then the OCB is 4 / 20 = 20%; if the IRB design is adopted (assuming IRB#0), then the OCB is 16 / 20 = 80%, which can meet the OCB requirement.

[0103] IV. Channel Access

[0104] Terminals operating in unlicensed frequency bands need to perform channel detection before accessing a channel. Only when the channel is detected to be idle can the terminal access the channel and transmit the intended service. Channel access methods include:

[0105] (1) Type 1 channel access method

[0106] The terminal first determines the channel access priority, and then determines the relevant parameters for channel access. The process is as follows:

[0107] Step 1: Set the counter N = N int , where N int It's from 0 to CW p Generate a random number that is uniformly distributed between the given numbers, and then proceed to Step 4.

[0108] Step 2: If N>0, the terminal decrements the counter by 1, i.e., N=N-1.

[0109] Step 3: Perform a listening slot detection on the channel with a length of Tsl (Tsl represents the LBT listening slot, with a length of 9μs). If the listening slot is idle, proceed to Step 4; otherwise, proceed to Step 5.

[0110] Step 4: If N=0, end the channel access process; otherwise, proceed to Step 2.

[0111] Step 5: Perform a time-length test on the channel for a period of T. d (where T) d =16+m p The detection is performed at a listening time interval of 9 μs. The result of this time interval detection is either that at least one listening time slot is occupied, or that all listening time slots are idle.

[0112] Step 6: If the channel monitoring result is T d If all listening slots are idle within the specified time, proceed to Step 4; otherwise, proceed to Step 5.

[0113] If the channel access process is completed, the terminal can use the channel to transmit the pending service. The maximum duration for which the terminal can use the channel for transmission cannot exceed T.mcot,p .

[0114] The values ​​of the parameters involved in each of the above steps are shown in Table 3 below:

[0115]

[0116] Table 3

[0117] (2) Type 2 channel access method

[0118] Type 2 channel access is a channel access method based on a fixed channel listening length, including three methods:

[0119] Type 2A Channel Access: The UE performs channel listening for at least 25µs before transmission begins, and initiates transmission only after successful channel listening.

[0120] Type 2B Channel Access: The UE performs a 16µs channel sniff before transmission begins and transmits after successful channel sniffing.

[0121] Type 2C Channel Access: The UE does not need to perform channel listening and transmits directly. The gap between the start position of this transmission and the end position of the previous transmission is less than or equal to 16µs, and the transmission length does not exceed 584µs.

[0122] The resource selection method, apparatus, and terminal for direct-access links provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0123] like Figure 3 As shown in the figure, this application embodiment provides a resource selection method for a direct link, including:

[0124] Obtain configured or pre-configured resource pool configuration information, which includes frequency domain resource configuration information and / or sub-channel configuration information, wherein the sub-channel includes comb-shaped resource blocks (IRBs).

[0125] In other words, the resource pool configuration information in this application embodiment may specifically include the definition of sub-channels of the IRB structure and other related content and / or frequency domain resource configuration information.

[0126] It should be noted that the embodiments of this application may specifically be a method for resource selection for terminals operating in unlicensed frequency bands via direct links, but are not limited thereto.

[0127] The resource selection method for direct links in this application embodiment obtains configured or pre-configured resource pool configuration information, which includes frequency domain resource configuration information and / or sub-channel configuration information, wherein the sub-channels include comb-shaped resource blocks (IRBs). This ensures that the sub-channels in the resource pool configured based on the resource pool configuration information include spaced IRBs. Therefore, when selecting resources from this resource pool, the selected resources can meet the limitations of OCBs and PSDs. This enables a complete implementation scheme for the resource selection mechanism of direct links operating in unlicensed frequency bands.

[0128] As an optional implementation, the configuration information of the sub-channel includes at least one of the following:

[0129] Sub-channel indication information;

[0130] The correspondence between sub-channels and IRBs;

[0131] The size of the sub-channel.

[0132] As a specific implementation, the correspondence between the sub-channels and the IRB includes at least one of the following:

[0133] (1) A subchannel corresponds to N consecutive IRBs located in the same resource pool, wherein the resource pool is a resource pool configured according to the resource pool configuration information; wherein N is a positive integer configured or pre-configured.

[0134] (2) A subchannel corresponds to N consecutive IRBs located in the same resource block set (RB set); where N is a configured or pre-configured positive integer;

[0135] Here, it should be noted that: firstly, the resource block set can be an LBT sub-band or the basic frequency domain granularity of the LBT, i.e., 20MHz; secondly, N can be only 1; and thirdly, N consecutive IRBs refer to IRBs with consecutive IRB indexes.

[0136] As a specific example of this implementation method, such as Figure 5 As shown, the resource pool includes two LBT sub-bands, the SCS is configured at 30kHz, and each RB set / LBT sub-band includes 50 PRBs. Therefore, each IRB in the resource pool contains 20 PRBs. The specific correspondence between the sub-channels and IRBs described above is as follows:

[0137] Option 1: One sub-channel corresponds to one IRB within the resource pool (i.e., the case where N=1).

[0138] In this approach, sub-channels correspond to IRBs within the resource pool. For example... Figure 5The correspondence 1 in the table means that a subchannel is an IRB within a resource pool. That is, a subchannel contains 20 PRBs. For example, subchannel #1 is IRB #1, and its corresponding PRB index is {PRB#1, PRB#6, PRB#11, ..., PRB#96}; subchannel #2 is IRB #2, and its corresponding PRB index is {PRB#2, PRB#7, PRB#12, ..., PRB#97}.

[0139] Option 2: The sub-channel corresponds to one IRB within one LBT sub-band / RB set (i.e., the case where N=1).

[0140] In this method, the sub-channel corresponds to the IRB within the LBT sub-band. For example... Figure 5 The correspondence 2 in the diagram indicates that a subchannel contains a portion of an IRB located within a certain LBT subband. For example, subchannel #1 includes the portion of IRB #1 located in LBT subband 1. In this case, a subchannel contains 10 PRBs. The indices of the PRBs corresponding to subchannel #1 are {PRB#1, PRB#6, PRB#11, ..., PRB#46}; the indices of the PRBs corresponding to subchannel #6 are {PRB#51, PRB#56, PRB#61, ..., PRB#96}.

[0141] Furthermore, as an optional implementation, when the N consecutive IRBs are located within the same resource pool, the indication information of the sub-channel includes any of the following:

[0142] The index of the starting IRB and the number of IRBs in the N consecutive IRBs;

[0143] The index of all IRBs in the N consecutive IRBs.

[0144] For example, the first IRB and the subsequent (N-1) IRBs in the resource pool constitute the first sub-channel, the second IRB and the subsequent (N-1) IRBs constitute the second sub-channel, and so on. Note that the starting IRB does not necessarily correspond to the IRB with the smallest IRB index.

[0145] Alternatively, the first IRB and the subsequent (N-1) IRBs within the resource pool can be considered the first sub-channel, the Nth IRB and the subsequent (N-1) IRBs can be considered the second sub-channel, and so on. The starting IRB does not necessarily correspond to the IRB with the smallest IRB index. In this configuration, different sub-channels do not overlap in the frequency domain; that is, different sub-channels are frequency-division multiplexed.

[0146] As can be seen, in this correspondence, the number of sub-channels is independent of the number of LBT sub-bands included in the resource pool. In other words, when the resource pool includes multiple LBT sub-bands, the number of sub-channels remains unchanged. This reduces the complexity of sub-channel indication and can reduce indication overhead to some extent.

[0147] Furthermore, as another optional implementation, when the N consecutive IRBs are located in the same resource block set, the indication information of the sub-channel includes at least one of the following:

[0148] The index of the same set of resource blocks;

[0149] The index of the starting IRB among the N consecutive IRBs;

[0150] The number of IRBs;

[0151] The index of all IRBs in the N consecutive IRBs.

[0152] For example, when N=1, the indication information of the sub-channel may only include the index of the same resource block set and the index of the IRB; when N is greater than 1, the indication information of the sub-channel may include the index of the same resource block set, the index of the starting IRB in the N consecutive IRBs, and the number of IRBs; or, when N is greater than 1, the indication information of the sub-channel may include the index of the same resource block set and the index of all IRBs in the N consecutive IRBs.

[0153] For example, when a resource pool includes an RB set, the first IRB and the subsequent (N-1) IRBs constitute the first sub-channel, the second IRB and the subsequent (N-1) IRBs constitute the second sub-channel, and so on.

[0154] Alternatively, when a resource pool includes an RB set, the initial IRB and the subsequent (N-1) IRBs constitute the first sub-channel, the Nth IRB and the subsequent (N-1) IRBs constitute the second sub-channel, and so on. In this configuration, different sub-channels do not overlap in the frequency domain; that is, different sub-channels are frequency-division multiplexed.

[0155] For example, when a resource pool comprises multiple RB sets, the first IRB and the subsequent (N-1) IRBs of the first RB set constitute the first sub-channel, and the subsequent (N-1) IRBs are located in the same RB set as the first IRB. The second IRB and the subsequent (N-1) IRBs of the first RB set constitute the second sub-channel, and these N IRBs are located in the same RB set. The first IRB and the subsequent (N-1) IRBs of the second RB set constitute the (m+1)th sub-channel, and these N IRBs also need to be located in the same RB set. The second IRB and the subsequent (N-1) IRBs of the second RB set constitute the (m+2)th sub-channel. Here, m represents the number of sub-channels in the first RB set. And so on.

[0156] Alternatively, when a resource pool comprises multiple RB sets, the first IRB and the subsequent (N-1) IRBs of the first RB set constitute the first sub-channel, and the subsequent (N-1) IRBs are located in the same RB set as the first IRB. The Nth IRB and the subsequent (N-1) IRBs of the first RB set constitute the second sub-channel, and these N IRBs are located in the same RB set. The first IRB and the subsequent (N-1) IRBs of the second RB set constitute the (m+1)th sub-channel, and these N IRBs also need to be located in the same RB set. The Nth IRB and the subsequent (N-1) IRBs of the second RB set constitute the (m+2)th sub-channel, and these N IRBs are located in the same RB set. Here, m represents the number of sub-channels in the first RB set. And so on.

[0157] As the first concrete example, such as Figure 6 As shown, the resource pool includes two RB sets, with an SCS of 30kHz, totaling 100 PRBs. If one subchannel occupies two IRBs, then the subchannel index is:

[0158] Subchannel 1 is the portion of RB set #1 where IRB#5 and IRB#1 are located;

[0159] Subchannel 2 is the portion of RB set #1 where IRB#1 and IRB#2 are located;

[0160] Subchannel 3 is the portion of RB set #1 where IRB#2 and IRB#3 are located;

[0161] Subchannel 4 is the portion of IRB#3 and IRB#4 located in RB set#1;

[0162] Subchannel 5 is the portion of RB set #2 where IRB#5 and IRB#1 are located;

[0163] Subchannel 6 is the portion of IRB#1 and IRB#2 located in RB set#2;

[0164] Subchannel 7 is the portion of IRB#2 and IRB#3 located in RB set#2;

[0165] Subchannel 8 is the portion of RB set #2 where IRB#3 and IRB#4 are located.

[0166] Note: The portion of IRB#4 located in RB set#1 and the portion of IRB#1 located in RB set#2 are not the same subchannel.

[0167] As a second specific example, such as Figure 6 As shown, the resource pool includes two RB sets, with an SCS of 30kHz, totaling 100 PRBs. If one subchannel occupies two IRBs, then the subchannel index is:

[0168] Subchannel 1 is the portion of RB set #1 where IRB#5 and IRB#1 are located;

[0169] Subchannel 2 is the portion of RB set #1 where IRB#2 and IRB#3 are located;

[0170] Subchannel 3 is the portion of RB set #2 where IRB#5 and IRB#1 are located;

[0171] Subchannel 4 is the portion of IRB#2 and IRB#3 located in RB set#2;

[0172] As a third specific example, such as Figure 6 As shown, the resource pool includes two RB sets, with an SCS of 30kHz, totaling 100 PRBs. Each sub-channel occupies one IRB, so the sub-channel index is:

[0173] Subchannel 1 is the portion of IRB#5 located in RB set#1; subchannel 2 is the portion of IRB#1 located in RB set#1; subchannel 3 is the portion of IRB#2 located in RB set#1; subchannel 4 is the portion of IRB#3 located in RB set#1; subchannel 5 is the portion of IRB#4 located in RB set#1.

[0174] Subchannel 6 is the portion of IRB#5 located in RB set#2; subchannel 7 is the portion of IRB#1 located in RB set#2; subchannel 8 is the portion of IRB#2 located in RB set#2; subchannel 9 is the portion of IRB#3 located in RB set#2; subchannel 10 is the portion of IRB#4 located in RB set#2.

[0175] As a fourth specific example, such as Figure 6 As shown, the resource pool includes two RB sets, with an SCS of 30kHz, totaling 100 PRBs. Each sub-channel occupies one IRB, so the sub-channel index is:

[0176] Sub-channel 1 is IRB#5; sub-channel 2 is IRB#1; sub-channel 3 is IRB#2; sub-channel 4 is IRB#3; sub-channel 5 is IRB#4.

[0177] As a fifth specific example, such as Figure 6 As shown, the resource pool includes two RB sets, with an SCS of 30kHz, totaling 100 PRBs. If one subchannel occupies two IRBs, then the subchannel index is:

[0178] Sub-channel 1 consists of IRB#5 and IRB#1; sub-channel 2 consists of IRB#1 and IRB#2; sub-channel 3 consists of IRB#2 and IRB#3; sub-channel 4 consists of IRB#3 and IRB#4.

[0179] As the sixth specific example, such as Figure 6 As shown, the resource pool includes two RB sets, with an SCS of 30kHz, totaling 100 PRBs. If one subchannel occupies two IRBs, then the subchannel index is:

[0180] Sub-channel 1 consists of IRB#5 and IRB#1; sub-channel 2 consists of IRB#2 and IRB#3.

[0181] As the seventh specific example, such as Figure 6 As shown, the resource pool includes two RB sets, with an SCS of 30kHz, totaling 100 PRBs. If one subchannel occupies two IRBs, then the subchannel index is:

[0182] Sub-channel 1 consists of IRB#1 and IRB#2; sub-channel 2 consists of IRB#3 and IRB#4.

[0183] As can be seen, in this correspondence, the granularity of the sub-channel is smaller, but it can support more complex service types. For example, when transmitting smaller service packets, using the first correspondence will reduce spectrum utilization. However, correspondingly, the indication using the second correspondence will be more complex, and the indication overhead will be greater than that of the first correspondence.

[0184] In addition, in the second correspondence case, that is, when the sub-channel includes N IRBs located in the same RB set, the sub-channel can be numbered in any of the following ways:

[0185] Method 1: Assign joint numbering to the sub-channels of each RB set sequentially. For example, if RB set #1 and RB set #2 each contain 5 sub-channels, then the sub-channel numbers would be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. Sub-channels 1-5 correspond to the 5 sub-channels of RB set #1, and sub-channels 6-10 correspond to the 5 sub-channels of RB set #2.

[0186] Method 2 involves independently numbering the sub-channels of each RB set. For example, if RB set #1 and RB set #2 each contain 5 sub-channels, then the numbers for both RB sets would be 1, 2, 3, 4, and 5. When the terminal indicates resources, it needs to indicate not only the sub-channel numbers but also the RB set numbers.

[0187] As an optional implementation, the size of the sub-channel includes any of the following:

[0188] The resource pool supports sub-channels of different sizes;

[0189] The resource pool only supports sub-channels of the same size.

[0190] In other words, depending on whether the guard band can be used for transmission and whether certain RBs in the IRB outside the guard band can be used for transmission, the resource pool can be configured to support sub-channels of different sizes, or the resource pool can be configured to support sub-channels of the same size.

[0191] Therefore, the resource pool configuration information may further include configuration information for remaining resource blocks (Remaining RBs), indicating PRBs that cannot be used for transmission or IRBs that are not used for transmission.

[0192] Specifically, the physical resource blocks (PRBs) included in the sub-channel are all PRBs located outside the guard band among N consecutive IRBs. In this way, frequency resources can be fully utilized and frequency utilization can be improved. It should be noted that when the resource pool supports sub-channels of different sizes or when there is no limit to the size of the sub-channels supported by the resource pool, the physical resource blocks (PRBs) included in the sub-channel are all PRBs located outside the guard band among N consecutive IRBs.

[0193] or,

[0194] The subchannel contains all PRBs located outside the guard band and remaining resource blocks (RBs) from among N consecutive IRBs. Similarly, this can be the case where the resource pool supports subchannels of the same size, or when there is no limit to the size of the subchannels supported by the resource pool, in which case the subchannel contains all PRBs located outside the guard band from among N consecutive IRBs.

[0195] In other words, when the resource pool supports sub-channels of the same size, excluding the guard band, the number of PRBs contained in the corresponding IRB of a sub-channel may differ. In this case, it is necessary to determine the minimum number of PRBs contained in different sub-channels, ensuring that some PRBs in sub-channels with IRBs exceeding the minimum number of PRBs cannot be used for transmission, thus guaranteeing that each sub-channel contains the same number of PRBs. This approach can reduce the processing complexity of the UE to some extent; for example, the TBS calculation does not need to consider different sub-channel sizes.

[0196] or,

[0197] The sub-channel contains all the PRBs from N consecutive IRBs. Similarly, when the resource pool supports sub-channels of different sizes or when there is no limit to the size of the sub-channels supported by the resource pool, the sub-channel contains all the PRBs from N consecutive IRBs.

[0198] In other words, based on the above embodiments, the protection band in the resource pool can be used in the following ways:

[0199] The frequency domain resources corresponding to the guard band cannot be used for transmission, or the frequency domain resources corresponding to the guard band can be used for transmission.

[0200] For example, when the transmission resources are less than or equal to the bandwidth of one LBT subband, the terminal cannot use the frequency domain resources corresponding to the guard band during transmission; when the transmission resources are greater than the bandwidth of one LBT subband, the terminal can use the frequency domain resources corresponding to the guard band during transmission.

[0201] Furthermore, as a specific implementation, the method also includes:

[0202] The transport block size (TBS) is determined based on the pre-agreed size of the sub-channels. For example, the TBS can be determined based on the maximum, minimum, or average size of the sub-channels; or...

[0203] The transport block size is determined based on whether the guard band is used for transmission. For example, if the terminal transmission occupies only one subchannel and is located within one subband, the guard band cannot be used for transmission, and the transport block size is determined based on the current subchannel size (excluding the guard band). If the terminal transmission occupies more resources than one subband, the guard band can be used for transmission, and the transport block size is determined based on the current subchannel size (without excluding the guard band). Or,

[0204] The transport block size is determined based on the frequency domain resources actually used for transmission. For example, a terminal can determine the maximum supportable transport block size based on all frequency domain resources in the resource pool, and then further calculate it based on the resources actually used for transmission.

[0205] It should be noted that this specific implementation method can determine the transport block size based on the above three methods when the resource pool supports sub-channels of different sizes, or when there is no limit to the size of the sub-channels supported by the resource pool.

[0206] As a specific example of the above optional implementation methods, such as Figure 7 As shown, the resource pool includes two RB sets, with an SCS of 30kHz. One LBT subband has 51 available PRBs excluding the guard band. If one subchannel corresponds to one IRB, for LBT subband 1, IRB#5 contains 11 PRBs, and the other four IRBs contain 10 PRBs each. Therefore:

[0207] If the correspondence between subchannels and IRBs is such that one subchannel corresponds to N consecutive IRBs located in the same resource pool, and the resource pool supports different subchannel sizes, then subchannel 1 (IRB#5) and subchannel 3 (IRB#2) contain 21 PRBs, and subchannel 2 (IRB#1), subchannel 4 (IRB#3), and subchannel 5 (IRB#4) contain 20 PRBs. The final Transport Block Size (TBS) can be calculated based on subchannel 1 / 3 or subchannel 2 / 4 / 5.

[0208] If the correspondence between subchannels and IRBs is such that one subchannel corresponds to N consecutive IRBs located in the same resource pool and supports the same subchannel size, then one PRB in one IRB#5 and one PRB in one IRB#2 can be set as a Remaining RB, that is, not used for service transmission, thereby ensuring that each subchannel contains the same number of PRBs.

[0209] If the correspondence between subchannels and IRBs is such that one subchannel corresponds to N consecutive IRBs located in the same RB set, and the resource pool supports different subchannel sizes, then taking the first LBT subband as an example, subchannel 1 (IRB#5) contains 11 PRBs, and subchannels 2 (IRB#1), 3 (IRB#2), 4 (IRB#3), and 5 (IRB#4) contain 10 PRBs. The final TBS calculation can be determined based on subchannel 1 or subchannels 2 / 3 / 4 / 5.

[0210] If the correspondence between subchannels and IRBs is such that one subchannel corresponds to N consecutive IRBs located in the same RB set, and the resource pool supports the same subchannel size, taking the first LBT subband as an example, one PRB in IRB#5 can be set as a Remaining RB, thereby ensuring that each subchannel contains 10 PRBs.

[0211] As a specific implementation, the frequency domain resource configuration information includes at least one of the following:

[0212] The initial IRB index of the resource pool;

[0213] The initial PRB index of the resource pool;

[0214] The number of sub-channels;

[0215] The number of IRBs contained in the sub-channel;

[0216] Remaining resource block configuration information.

[0217] The starting IRB index of the resource pool refers to the initial IRB corresponding to the resource pool, which can be understood as the initial IRB of the first sub-channel; the starting PRB index of the resource pool refers to the initial PRB corresponding to the resource pool, which can be understood as the initial PRB of the first sub-channel. Furthermore, the frequency domain resource configuration information may simultaneously include both the starting IRB index and the starting PRB index of the resource pool. The size of the resource pool refers to the number of IRBs contained in the sub-channel.

[0218] The resource selection method for direct links in this application reduces the complexity of UE indication by setting the correspondence between sub-channels (the smallest granularity of resource allocation) and IRBs, and lays the foundation for service transmission and resource allocation mechanisms, so that the selected resources can meet the restrictions of OCB and PSD. In this way, the resource selection mechanism for direct links operating in unlicensed frequency bands can form a complete implementation scheme.

[0219] like Figure 4 As shown in the embodiments of this application, a resource selection method for a direct link is also provided, including:

[0220] Step 401: Select a first resource from the resource pool for transmitting the Physical Sidelink Control Channel (PSCCH) and the Physical Sidelink Shared Channel (PSCCH); and / or,

[0221] Select a second resource from the resource pool for transmitting the Physical Sidelink Feedback Channel (PSFCH).

[0222] It should be noted that, when the resource pool supports HARQ feedback, the resource selection method for the pass-through link in this application embodiment includes the step of selecting the second resource for transmitting PSFCH in the resource pool as described above.

[0223] As an optional implementation, in step 401, the first resource for transmitting the PSCCH and PSSCH is selected, including:

[0224] The first resource is selected first within the same LBT subband.

[0225] Specifically, this optional implementation may involve prioritizing the selection of the first resource within the same LBT subband when the resource pool includes multiple LBT subbands and the bandwidth required for transmission by the user equipment (UE) is less than or equal to that of one LBT subband. Alternatively, without any restrictions, the first resource may also be prioritized for selection within the same LBT subband.

[0226] Furthermore, as an optional implementation, if the first resource cannot be selected in the same LBT subband, then the first resource is selected from multiple LBT subbands in the resource pool; or, if the first resource cannot be selected in the same LBT subband, then the first resource is selected from the resource set of all LBT subbands.

[0227] It should be noted that this optional implementation method is not only applicable to single transmissions, i.e., the resources for the UE's initial transmission or a retransmission, preferentially selecting resources located within the same LBT subband; it is also applicable to multiple transmissions, i.e., the initial transmission and retransmissions should also preferentially select resources located within the same LBT subband. In this optional implementation method, all transmission resources are preferentially selected within one LBT subband. From the LBT's perspective, this reduces the complexity of the LBT, because it only needs to monitor whether one LBT subband is idle. In this case, the probability of transmission failure due to LBT failure can be reduced, further ensuring transmission efficiency and reliability.

[0228] As a specific implementation, step 401 involves selecting a first resource from the resource pool for transmitting the Physical Cut-Through Link Control Channel (PSCCH) and the Physical Cut-Through Link Shared Channel (PSSCH), including:

[0229] (1) Based on the resource exclusion results, determine the available resource set for each LBT subband; that is, after performing resource exclusion, the UE determines the available resource set S_A for different LBT subbands. i , where i represents the index of the LBT subband;

[0230] It should be noted that after determining each available resource set, the UE's physical layer will report the available resource sets of each LBT subband to the Media Access Control (MAC) layer.

[0231] (2) Select the first resource from any of the available resource sets; that is, the UE first selects from any S_A i Select the resource to be transmitted; if the first resource is not selected in the first available resource set (S_A1), then select the first resource from the second (S_A2), and so on, until the first resource is selected.

[0232] Furthermore, the method also includes:

[0233] If the first resource cannot be selected in any of the available resource sets, then the first resource is selected from at least two of the available resource sets; that is, if from all S_A i If no resource can be successfully selected from either S_A, the UE selects a transmission resource from S_A, where S_A must contain at least two S_A's. i The resources in, or, S_A contains all S_A. i Resources within.

[0234] It should be noted that the resource selection method in this specific implementation prioritizes all transmission resources within one LBT subband. From the perspective of LBT, this reduces the complexity of LBT because it only needs to monitor whether one LBT subband is idle. In this case, the probability of transmission failure due to LBT failure can be reduced, further ensuring transmission efficiency and reliability, and increasing the probability of channel access.

[0235] As a specific example of this implementation method, such as Figure 8 As shown, after resource exclusion, four available resources were identified: R1, R2, R3, and R4. The UE needs to perform two transmissions, meaning it requires selecting two resources. The UE should preferentially select R2 / R4 as the transmission resource because R1 spans two LBT subbands, while R2 and R3, and R4 and R3, are located in different LBT subbands.

[0236] As an optional implementation, in step 401, selecting a second resource from the resource pool for transmitting the Physical Through Link Feedback Channel (PSFCH) includes:

[0237] When the PSSCH corresponding to the PSFCH is located in multiple LBT subbands, and the second resource is mapped to multiple LBT subbands simultaneously, the selection of the second resource includes any of the following:

[0238] (1) Select the second resource according to the time slot index of the PSSCH corresponding to the PSFCH and the index of the starting sub-channel;

[0239] In other words, when a UE occupies multiple LBT subbands, PSFCH resources (second resources) are mapped simultaneously in multiple LBT subbands. The mapping method for PSFCH resources (second resources) is to map PSFCH resources based on the slot number of the associated PSSCH and the number of the starting subchannel. When a UE occupies multiple LBT subbands, the index of the PSSCH transmission resource corresponding to PSFCH in each LBT subband is independently numbered.

[0240] (2) Select the second resource according to the time slot index of the PSSCH corresponding to the PSFCH and the index of the sub-channel corresponding to the first resource in each LBT sub-band.

[0241] In other words, when a UE occupies multiple LBT subbands, PSFCH resources (second resources) are mapped simultaneously across multiple LBT subbands. The mapping method between PSSCH resources (first resources) and PSFCH resources (second resources) is based on the associated PSSCH slot number and the subchannel number occupied by the PSSCH transmission. That is, when mapping different LBT subbands, PSFCH resources are mapped according to the subchannel number occupied by the PSSCH transmission in the corresponding LBT subband.

[0242] Furthermore, when the PSSCH corresponding to the PSFCH is located within a single LBT subband, and when the second resource is mapped to multiple LBT subbands simultaneously, the selection of the second resource includes any of the following:

[0243] (1) Select the second resource according to the time slot index of the PSSCH corresponding to the PSFCH and the index of the starting sub-channel;

[0244] (2) Select the second resource according to the time slot index of the PSSCH corresponding to the PSFCH and the index of the sub-channel corresponding to the first resource in each LBT sub-band.

[0245] In this optional implementation, the probability of successful PSFCH transmission can be increased by mapping PSFCH resources in multiple subbands simultaneously. The method of mapping PSFCH resources in multiple subbands is also clearly defined, making it applicable to multi-LBT subband scenarios of straight-through links in unlicensed frequency bands.

[0246] Specifically, the starting sub-channel is the starting sub-channel in the resource pool of the first resource, or the starting sub-channel is the starting sub-channel in each of the LBT sub-bands of the first resource.

[0247] As a specific example of this optional implementation, such as Figure 9A As shown, when the mapping method between PSSCH resources (first resource) and PSFCH resources (second resource) is based on the associated PSSCH slot number and the sub-channel number occupied by the PSSCH transmission to map the PSFCH resources, the feedback resources of the two LBT subbands are determined according to all sub-channels of the corresponding LBT subband where the PSSCH is located; for example... Figure 9B As shown, when the mapping method between PSSCH resources (first resource) and PSFCH resources (second resource) is based on mapping PSFCH resources to the associated PSSCH slot number and the starting sub-channel number, and the starting sub-channel is the starting sub-channel in each LBT sub-band, it can be determined according to the starting sub-channel of the PSSCH in the corresponding LBT sub-band based on the feedback resources of the two LBT sub-bands; for example... Figure 9C As shown, the mapping method between PSSCH resources (first resource) and PSFCH resources (second resource) is to map PSFCH resources based on the associated PSSCH slot number and the starting sub-channel number. When the starting sub-channel is the starting sub-channel in the first resource, the feedback resources of the two LBT subbands can be determined according to the starting sub-channel of the PSSCH.

[0248] Furthermore, as an optional implementation, the method also includes:

[0249] Sending first-stage Sidelink Control Information (SCI), the first-stage SCI includes a first indication field, which indicates the LBT subband where the PSCCH and PSSCH are located using at least one of the following methods:

[0250] P*log2(M), where P is the maximum number of SCI resources that can be reserved in the configuration or pre-configuration, and M is the number of LBT subbands contained in the first resource pool;

[0251] The bitmap method requires P*M bits.

[0252] The method of joint encoding.

[0253] Additionally, it should be noted that the resource selection methods for direct links include:

[0254] S1: Steps to obtain resource pool configuration information;

[0255] S2: Select resources from the resource pool corresponding to the resource pool configuration information.

[0256] Specifically, the resource selection method for the direct link in this application embodiment can be improved by only modifying the resource pool configuration information in step 1, for example, by adopting... Figure 3 The method shown can also be improved by simply modifying the resource selection method in step S2, for example, by using... Figure 4 The method shown can also be improved by simultaneously modifying steps S1 and S2.

[0257] like Figure 10 As shown in the figure, this application embodiment also provides a resource selection device for a direct link, including:

[0258] The acquisition module 1001 is used to acquire configured or pre-configured resource pool configuration information, the resource pool configuration information including frequency domain resource configuration information and / or sub-channel configuration information, the sub-channel including comb-shaped resource blocks (IRBs).

[0259] Optionally, the configuration information of the sub-channel includes at least one of the following:

[0260] Sub-channel indication information;

[0261] The correspondence between sub-channels and IRBs;

[0262] The size of the sub-channel.

[0263] Optionally, the correspondence between the sub-channels and the IRB includes at least one of the following:

[0264] A subchannel corresponds to N consecutive IRBs located in the same resource pool, wherein the resource pool is a resource pool configured according to the resource pool configuration information;

[0265] A subchannel corresponds to N consecutive IRBs located within the same resource block set;

[0266] Where N is a positive integer representing configuration or pre-configuration.

[0267] Optionally, when the N consecutive IRBs are located within the same resource pool, the indication information of the sub-channel includes any of the following:

[0268] The index of the starting IRB and the number of IRBs in the N consecutive IRBs;

[0269] The index of all IRBs in the N consecutive IRBs.

[0270] Optionally, when the N consecutive IRBs are located in the same resource block set, the indication information of the sub-channel includes at least one of the following:

[0271] The index of the same set of resource blocks;

[0272] The index of the starting IRB among the N consecutive IRBs;

[0273] The number of IRBs;

[0274] The index of all IRBs in the N consecutive IRBs.

[0275] Optionally, the size of the sub-channel includes any of the following:

[0276] The resource pool supports sub-channels of different sizes;

[0277] The resource pool only supports sub-channels of the same size.

[0278] Optionally, when the resource pool supports sub-channels of different sizes, the physical resource blocks (PRBs) contained in the sub-channel are all PRBs located outside the guard band from N consecutive IRBs; or,

[0279] When the resource pool supports sub-channels of the same size, the sub-channel contains all PRBs located outside the guard band and remaining resource blocks (RBs) from N consecutive IRBs; or,

[0280] When the resource pool supports sub-channels of the same size, the sub-channel contains all the PRBs from N consecutive IRBs.

[0281] Optionally, the device further includes a determining module for:

[0282] The transport block size is determined based on the pre-agreed sub-channel size; or,

[0283] The size of the transmission block is determined based on whether the guard band is used for transmission; or...

[0284] The transport block size is determined based on the frequency domain resources used in the actual transmission.

[0285] Optionally, the frequency domain resource configuration information includes at least one of the following:

[0286] The initial IRB index of the resource pool;

[0287] The initial RPB index of the resource pool;

[0288] The number of sub-channels;

[0289] Number of IRBs included in the sub-channel

[0290] Remaining resource block configuration information.

[0291] It should be noted that the resource selection device for the direct link provided in this application embodiment can achieve the above-mentioned... Figure 3 All the method steps implemented in the resource selection method embodiment of the direct link described herein can achieve the same technical effect. Therefore, the parts that are the same as those in the method embodiment and their beneficial effects will not be described in detail here.

[0292] like Figure 11 As shown in the figure, this application embodiment also provides a resource selection device for a direct link, characterized in that it includes: a selection module 1101, used for:

[0293] Select the first resource from the resource pool for transmitting the Physical Cut-Through Control Channel (PSCCH) and the Physical Cut-Through Shared Channel (PSSCH); and / or,

[0294] Select a second resource from the resource pool for transmitting the Physical Through Link Feedback Channel (PSFCH).

[0295] Optionally, the selection module 1101 includes:

[0296] The first selection submodule is configured to, when the resource pool includes multiple LBT subbands and the bandwidth required for transmission by the user equipment (UE) is less than or equal to that of one LBT subband, preferentially select the first resource within the same LBT subband.

[0297] Optionally, the selection module 1101 includes:

[0298] The second selection submodule is used to select the first resource from the plurality of LBT subbands in the resource pool.

[0299] Optionally, the selection module 1101 includes:

[0300] The determination submodule is used to determine the available resource set for each LBT subband based on the resource exclusion results;

[0301] The third selection submodule is used to select the first resource from any of the available resource sets.

[0302] Furthermore, the selection module 1101 also includes:

[0303] The fourth selection submodule is used to select the first resource from at least two sets of available resources if the first resource cannot be selected in each of the available resource sets.

[0304] Optionally, the selection module 1101 is specifically used for:

[0305] When the PSSCH corresponding to the PSFCH is located in multiple LBT subbands, and the second resource is mapped to multiple LBT subbands simultaneously, the selection of the second resource includes any of the following:

[0306] The second resource is selected based on the time slot index of the PSSCH corresponding to the PSFCH and the index of the starting sub-channel;

[0307] The second resource is selected based on the time slot index of the PSSCH corresponding to the PSFCH and the index of the sub-channel corresponding to the first resource in each LBT sub-band.

[0308] Optionally, the starting sub-channel is the starting sub-channel in the resource pool of the first resource, or the starting sub-channel is the starting sub-channel in each of the LBT sub-bands of the first resource.

[0309] Optionally, the device further includes:

[0310] The transmitting module is used to transmit first-stage cut-through link control information (SCI). The first-stage SCI includes a first indication field, which indicates the LBT subband where the PSCCH and PSSCH are located using at least one of the following methods:

[0311] P*log2(M), where P is the maximum number of SCI resources that can be reserved in the configuration or pre-configuration, and M is the number of LBT subbands contained in the first resource pool;

[0312] The bitmap method requires P*M bits.

[0313] The method of joint encoding.

[0314] Optionally, the resource pool in this embodiment is a resource pool configured according to the resource pool configuration information in the resource selection method for the direct link as described above.

[0315] It should be noted that the resource selection device for the direct link provided in this application embodiment can achieve the above-mentioned... Figure 4 All the method steps implemented in the resource selection method embodiment of the direct link described herein can achieve the same technical effect. Therefore, the parts that are the same as those in the method embodiment and their beneficial effects will not be described in detail here.

[0316] like Figure 12As shown, this application embodiment also provides a terminal, including a transceiver 1210, a memory 1220, a processor 1200, and a computer program stored in the memory 1220 and running on the processor 1200. When the processor 1200 executes the computer program, it implements the various processes of the resource selection methods of the various pass-through links described above, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0317] The transceiver 1210 is used to receive and send data under the control of the processor 1200.

[0318] Among them, Figure 12 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 1200 and memory represented by memory 1220 together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. Transceiver 1210 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium. For different user equipment, user interface 1230 can also be an interface capable of connecting external or internal devices, including but not limited to keypads, displays, speakers, microphones, joysticks, etc.

[0319] The processor 1200 is responsible for managing the bus architecture and general processing, while the memory 1220 can store the data used by the processor 1200 when performing operations.

[0320] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a computer program instructing the relevant hardware to implement them. The computer program includes instructions to perform some or all of the steps of the above methods; and the computer program can be stored in a readable storage medium, which can be any form of storage medium.

[0321] In addition, this application embodiment also provides a computer-readable storage medium storing a program. When executed by a processor, this program implements the various processes of the resource selection method embodiment for the pass-through link described above, and achieves the same technical effect. To avoid repetition, it will not be described again here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0322] The above description is the preferred embodiment of this application. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles described in this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A resource selection method for a direct link, characterized in that, include: Obtain configured or pre-configured resource pool configuration information, which includes frequency domain resource configuration information and / or sub-channel configuration information, wherein the sub-channel includes comb-shaped resource blocks (IRBs); The configuration information of the sub-channel includes at least one of the following: Sub-channel indication information; The correspondence between sub-channels and IRBs; Subchannel size; The correspondence between the sub-channel and the IRB includes one sub-channel corresponding to N consecutive IRBs located in the same resource block set; where N is a configured or pre-configured positive integer, and when the N consecutive IRBs are located in the same resource block set, the indication information of the sub-channel includes at least the number of IRBs; The size of the subchannel includes the resource pool supporting subchannels of different sizes. When the resource pool supports subchannels of different sizes, the physical resource blocks (PRBs) contained in the subchannel are all PRBs located outside the guard band among N consecutive IRBs.

2. The method according to claim 1, characterized in that, When the N consecutive IRBs are located in the same resource pool, the indication information of the sub-channel includes any one of the following: The index of the starting IRB and the number of IRBs in the N consecutive IRBs; The index of all IRBs in the N consecutive IRBs.

3. The method according to claim 1, characterized in that, When the N consecutive IRBs are located in the same resource block set, the indication information of the sub-channel further includes at least one of the following: The index of the same set of resource blocks; The index of the starting IRB among the N consecutive IRBs; The index of all IRBs in the N consecutive IRBs.

4. The method according to claim 1, characterized in that, The method further includes: The transport block size is determined based on the pre-agreed sub-channel size; or, The size of the transmission block is determined based on whether the guard band is used for transmission; or... The transport block size is determined based on the frequency domain resources used in the actual transmission.

5. The method according to claim 1, characterized in that, The frequency domain resource configuration information includes at least one of the following: The initial IRB index of the resource pool; The initial PRB index of the resource pool; The number of sub-channels; The number of IRBs contained in the sub-channel; Remaining resource block configuration information.

6. A resource selection method for a direct link, characterized in that, include: Select the first resource from the resource pool for transmitting the Physical Cut-Through Control Channel (PSCCH) and the Physical Cut-Through Shared Channel (PSSCH); And / or, Select a second resource from the resource pool for transmitting the Physical Straight-Through Link Feedback Channel (PSFCH); The resource pool is a resource pool configured according to the resource pool configuration information in the direct link resource selection method as described in any one of claims 1 to 5.

7. The method according to claim 6, characterized in that, The first resource selected from the resource pool for transmitting the Physical Cut-Through Control Channel (PSCCH) and the Physical Cut-Through Shared Channel (PSSCH) includes: Select the first resource within the same LBT subband.

8. The method according to claim 7, characterized in that, The method further includes: If the first resource cannot be selected within the same LBT subband, then the first resource is selected from among the multiple LBT subbands in the resource pool.

9. The method according to claim 6, characterized in that, The first resource selected from the resource pool for transmitting the Physical Cut-Through Control Channel (PSCCH) and the Physical Cut-Through Shared Channel (PSSCH) includes: Based on the resource exclusion results, determine the available resource set for each LBT subband; Select the first resource from any of the available resource sets.

10. The method according to claim 9, characterized in that, The method further includes: If the first resource cannot be selected in any of the available resource sets, then the first resource is selected from at least two of the available resource sets.

11. The method according to claim 6, characterized in that, The second resource selected from the resource pool for transmitting the Physical Cut-Through Link Feedback Channel (PSFCH) includes: When the PSSCH corresponding to the PSFCH is located in multiple LBT subbands, and the second resource is mapped to multiple LBT subbands simultaneously, the selection of the second resource includes any of the following: The second resource is selected based on the time slot index of the PSSCH corresponding to the PSFCH and the index of the starting sub-channel; The second resource is selected based on the time slot index of the PSSCH corresponding to the PSFCH and the index of the sub-channel corresponding to the first resource in each LBT sub-band.

12. The method according to claim 11, characterized in that, The starting sub-channel is either the starting sub-channel in the resource pool within the first resource, or the starting sub-channel is the starting sub-channel in each of the LBT sub-bands within the first resource.

13. The method according to claim 6, characterized in that, The method further includes: Sending Phase 1 Cut-Through Link Control Information (SCI), the Phase 1 SCI includes a first indication field, which indicates the LBT subband where the PSCCH and PSSCH are located using at least one of the following methods: P*log2(M), where P is the maximum number of SCI resources that can be reserved in the configuration or pre-configuration, and M is the number of LBT subbands contained in the resource pool; The bitmap method requires P*M bits. The method of joint encoding.

14. A resource selection device for a direct link, characterized in that, include: The acquisition module is used to acquire configured or pre-configured resource pool configuration information, which includes frequency domain resource configuration information and / or sub-channel configuration information, wherein the sub-channel includes comb-shaped resource blocks (IRBs). The configuration information of the sub-channel includes at least one of the following: Sub-channel indication information; The correspondence between sub-channels and IRBs; Subchannel size; The correspondence between the sub-channel and the IRB includes one sub-channel corresponding to N consecutive IRBs located in the same resource block set; where N is a configured or pre-configured positive integer, and when the N consecutive IRBs are located in the same resource block set, the indication information of the sub-channel includes at least the number of IRBs; The size of the subchannel includes the resource pool supporting subchannels of different sizes. When the resource pool supports subchannels of different sizes, the physical resource blocks (PRBs) contained in the subchannel are all PRBs located outside the guard band among N consecutive IRBs.

15. A resource selection device for a direct link, characterized in that, Includes a selection module for: Select the first resource from the resource pool for transmitting the Physical Cut-Through Control Channel (PSCCH) and the Physical Cut-Through Shared Channel (PSSCH); and / or, Select a second resource from the resource pool for transmitting the Physical Straight-Through Link Feedback Channel (PSFCH); The resource pool is a resource pool configured according to the resource pool configuration information in the direct link resource selection method as described in any one of claims 1 to 5.

16. A terminal, comprising a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the resource selection method for a pass-through link as described in any one of claims 1 to 5, or the resource selection method for a pass-through link as described in any one of claims 6 to 13.

17. A readable storage medium having a program or instructions stored thereon, characterized in that, When the program or instructions are executed by the processor, they implement the resource selection method for a pass-through link as described in any one of claims 1 to 5, or the resource selection method for a pass-through link as described in any one of claims 6 to 13.

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