Sidelink resource selection method, device, and terminal

Abstract

The present disclosure provides a sidelink resource selection method, a device, and a terminal, which relate to the field of communication technology. The sidelink resource selection method includes: acquiring configured or pre-configured resource pool configuration information, the resource pool configuration information including frequency domain resource configuration information and / or subchannel configuration information, and the subchannel including an interlaced resource block (IRB).

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This disclosure claims priority to Chinese Patent Application No. 202210948342.0, filed in China on August 8, 2022, the entire contents of which are incorporated herein by reference. The present disclosure relates to the field of communications technology, and in particular to a sidelink resource selection method, device, and terminal. [Background technology]

[0002] Terminal devices operating in unlicensed spectrum (unlicensed spectrum) must meet the Occupied Channel Bandwidth (OCB) and Power Spectral Density (PSD) constraints, so the Interlaced Resource Block (IRB) structure has been introduced into New Radio on Unlicensed Spectrum (NR-U) operating in unlicensed spectrum. Currently, IRB is one of the candidates in the discussion of Sidelink on Unlicensed Spectrum (SL-U) mechanisms operating in unlicensed spectrum, but there is no complete implementation method at present. Summary of the Invention [Problem to be solved by the invention]

[0003] The present disclosure aims to provide a sidelink resource selection method, device, and terminal, thereby resolving the problem that a complete implementation of a sidelink mechanism operating in unlicensed bands has not yet been established. [Means for solving the problem]

[0004] In a first aspect, to achieve the above object, an embodiment of the present disclosure provides a sidelink resource selection method, which includes: obtaining configured or pre-configured resource pool configuration information, the resource pool configuration information including frequency domain resource configuration information and / or subchannel configuration information, and the subchannel including interlaced resource blocks (IRBs).

[0005] Optionally, the sub-channel setting information includes at least one of sub-channel indication information, a correspondence between a sub-channel and an IRB, and a size of the sub-channel.

[0006] Optionally, the correspondence relationship between the subchannels and IRBs includes at least one of: one subchannel corresponds to N consecutive IRBs located in the same resource pool, where the resource pool is a resource pool configured based on the resource pool configuration information; and one subchannel corresponds to N consecutive IRBs located in the same resource block set, where N is a configured or preset positive integer.

[0007] Optionally, if the N consecutive IRBs are located in the same resource pool, the subchannel indication information includes one of the index of a starting IRB and the number of IRBs in the N consecutive IRBs, and the indexes of all IRBs in the N consecutive IRBs.

[0008] Optionally, if the N consecutive IRBs are located in the same resource block set, the subchannel indication information includes at least one of the index of the same resource block set, the index of the starting IRB in the N consecutive IRBs, the number of IRBs, and the indexes of all IRBs in the N consecutive IRBs.

[0009] Optionally, the size of the sub-channels includes one of: the resource pool supporting sub-channels of different sizes; and the resource pool supporting only sub-channels of the same size.

[0010] Alternatively, if the resource pool supports subchannels of different sizes, the physical resource blocks PRBs included in the subchannels are all PRBs out of N consecutive IRBs that are located outside the guard band, or if the resource pool supports subchannels of the same size, the PRBs included in the subchannels are all PRBs out of N consecutive IRBs that are located outside the guard band and the remaining resource blocks RB, or if the resource pool supports subchannels of the same size, the PRBs included in the subchannels are all PRBs out of N consecutive IRBs.

[0011] Optionally, the sidelink resource selection method further comprises the step of determining a transmission block size based on a pre-agreed subchannel size, or determining the transmission block size based on whether a guard band is used for the transmission, or determining the transmission block size based on frequency domain resources used for the actual transmission.

[0012] Optionally, the frequency domain resource configuration information includes at least one of: a starting IRB index of a resource pool, a starting PRB index of a resource pool, the number of subchannels, the number of IRBs included in the subchannel, and configuration information of the remaining resource blocks.

[0013] In a second aspect, to achieve the above object, an embodiment of the present disclosure further provides a sidelink resource selection method, comprising: selecting first resources from a resource pool for transmitting a physical sidelink control channel (PSCCH) and a physical sidelink shared channel (PSSCH), and / or selecting second resources from the resource pool for transmitting a physical sidelink feedback channel (PSFCH).

[0014] Optionally, selecting first resources from a resource pool for transmitting the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH includes preferentially selecting the first resources from the same LBT subband.

[0015] Optionally, the sidelink resource selection method includes selecting the first resource from a plurality of the LBT subbands of the resource pool if the first resource cannot be selected from the same LBT subband.

[0016] Optionally, selecting first resources from a resource pool for transmitting the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH includes determining an available resource set for each LBT subband based on a resource exclusion result, and selecting the first resources from any of the available resource sets.

[0017] Optionally, the sidelink resource selection method further includes selecting the first resource from at least two of the available resource sets if the first resource cannot be selected from any of the available resource sets.

[0018] Optionally, in the step of selecting second resources from the resource pool for transmitting a physical sidelink feedback channel (PSFCH), if a PSSCH corresponding to the PSFCH is located in multiple LBT subbands and the second resources are simultaneously mapped to the multiple LBT subbands, selecting the second resources may include selecting the second resources based on a slot index and a starting subchannel index of a PSSCH corresponding to the PSFCH, or selecting the second resources based on a slot index of a PSSCH corresponding to the PSFCH and an index of a subchannel corresponding to the first resource in each of the LBT subbands.

[0019] Optionally, the starting subchannel is a starting subchannel in a resource pool of the first resource, or the starting subchannel is a starting subchannel in each of the LBT subbands of the first resource.

[0020] Optionally, the sidelink resource selection method includes transmitting first-stage sidelink control information (SCI), the first-stage SCI including a first indication field, which indicates LBT subbands where the PSCCH and the PSSCH are located in at least one of a P×log2(M) scheme, where P is a maximum reservable resource number of a configured or pre-configured SCI, and M is the number of LBT subbands included in the first resource pool, a bitmap scheme, where the number of required bits is P×M, and a joint coding scheme.

[0021] Optionally, the resource pool is a resource pool configured based on resource pool configuration information in the sidelink resource selection method described in the first aspect.

[0022] In a third aspect, to achieve the above object, an embodiment of the present disclosure further provides a sidelink resource selection device, which includes: an acquisition module for acquiring configured or pre-configured resource pool configuration information, where the resource pool configuration information includes frequency domain resource configuration information and / or subchannel configuration information, and the subchannel includes interlaced resource blocks (IRBs).

[0023] In a fourth aspect, to achieve the above object, an embodiment of the present disclosure further provides a sidelink resource selection device, including a selection module, configured to select first resources from a resource pool for transmitting a physical sidelink control channel (PSCCH) and a physical sidelink shared channel (PSSCH), and / or select second resources from the resource pool for transmitting a physical sidelink feedback channel (PSFCH).

[0024] In a fifth aspect, to achieve the above object, an embodiment of the present disclosure further provides a terminal, including a transceiver, a memory, a processor, and a computer program stored in the memory and executed by the processor, the computer program executing the processor realizing the sidelink resource selection method according to the first aspect or the second aspect.

[0025] In a sixth aspect, to achieve the above object, an embodiment of the present disclosure further provides a readable storage medium having a program or instructions stored thereon, which, when executed by a processor, realizes the sidelink resource selection method according to the first aspect or the second aspect. [Effects of the Invention]

[0026] The above technical solution of the present disclosure has at least the following technical effects:

[0027] A sidelink resource selection method according to an embodiment of the present disclosure obtains configured or pre-configured resource pool configuration information, the resource pool configuration information including frequency domain resource configuration information and / or subchannel configuration information, where the subchannels include interlaced resource blocks (IRBs). Therefore, subchannels in a resource pool configured based on the resource pool configuration information include discretely distributed PRBs, so that resources selected during resource selection can satisfy the constraints of occupied bandwidth (OCB) and power spectral density (PSD). This provides a complete implementation of a sidelink resource selection mechanism operating in unlicensed bands. [Brief explanation of the drawings]

[0028] [Figure 1] FIG. 1 is a schematic diagram of frequency domain resource configuration for a resource pool in the related art. [Figure 2] 1 is a schematic diagram showing the correspondence between IRB indexes and PRB indexes in NR-U. [Figure 3] 1 is a first flowchart of a sidelink resource selection method according to an embodiment of the present disclosure. [Figure 4] 2 is a second flowchart of a sidelink resource selection method according to an embodiment of the present disclosure. [Figure 5] FIG. 2 is a schematic diagram of definitions for subchannels according to an embodiment of the present disclosure. [Figure 6] FIG. 2 is a schematic diagram of subchannel indexes according to an embodiment of the present disclosure. [Figure 7] FIG. 2 is a schematic diagram of sub-channel sizes according to an embodiment of the present disclosure. [Figure 8] FIG. 10 is a schematic diagram of multi-subband resource selection according to an embodiment of the present disclosure. [Figure 9A] 1 is a first schematic diagram of a mapping relationship between PSSCH resources and PSFCH resources according to an embodiment of the present disclosure. [Figure 9B] 10 is a second schematic diagram of a mapping relationship between PSSCH resources and PSFCH resources according to an embodiment of the present disclosure. [Figure 9C] 10 is a third schematic diagram of a mapping relationship between PSSCH resources and PSFCH resources according to an embodiment of the present disclosure. [Figure 10] 1 is a first structural schematic diagram of a sidelink resource selection device according to an embodiment of the present disclosure; [Figure 11] 2 is a second structural schematic diagram of a sidelink resource selection device according to an embodiment of the present disclosure; [Figure 12] FIG. 1 is a structural schematic diagram of a terminal according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0029] To clarify the technical problems, technical solutions, and advantages of the present disclosure, the following detailed description will be provided in conjunction with drawings and specific embodiments. In the following description, specific details providing specific configurations and assemblies are provided merely to contribute to a thorough understanding of the embodiments of the present disclosure. Therefore, those skilled in the art can make various changes and modifications to the embodiments described herein without departing from the scope and spirit of the present disclosure. Also, for clarity and conciseness, descriptions of well-known functions and configurations will be omitted.

[0030] It should be noted that the references "in one embodiment" or "in one embodiment" throughout the specification mean that a particular feature, structure, or characteristic associated with an embodiment is included in at least one embodiment of the present disclosure. Thus, the references "in one embodiment" or "in one embodiment" throughout the specification do not necessarily refer to the same embodiment. Furthermore, the particular feature, structure, or characteristic may be combined in any suitable manner in one or more embodiments.

[0031] In addition, in various embodiments of the present disclosure, the magnitude of the numbers of each process below does not indicate the order of execution, and the execution order of each process should be determined by its function and internal logic, and does not in any way limit the implementation process of the embodiments of the present disclosure.

[0032] In the embodiments of the present disclosure, "B corresponding to A" indicates that B and A are related to each other and that B can be determined based on A. Note that determining B based on A does not only mean that B can be determined based on A, but also that B can be determined based on A and / or other information.

[0033] In describing the embodiments of the present disclosure, we first explain some concepts that will be used in the following description.

[0034] 1. Unlicensed bands Unlicensed spectrum can be used free of charge without a license and can be used by any organization or individual. For example, commonly used technologies such as Wi-Fi and Bluetooth® all use unlicensed bands. To avoid interference between different systems, it is necessary to avoid interfering with other systems as much as possible when using unlicensed bands. Therefore, LBT (Listen Before Talk) technology is introduced to monitor the channel before accessing it, and only access the channel if the system detects that it is idle.

[0035] A terminal device operating in an unlicensed band must meet the 80% occupied channel bandwidth (OCB) limit. Regarding the 80% OCB limit, the 80% OCB limit is based on the LBT subband (size is 20 MHz). For example, if the current total bandwidth is 20 MHz, i.e., includes one LBT subband, the terminal's transmission must meet the 80% OCB requirement. If the current total bandwidth is 40 MHz, i.e., includes two LBT subbands, when the terminal's transmission is located in the upper or lower LBT subband, the occupied bandwidth must be equal to or greater than 80% of the corresponding LBT subband (i.e., 80% of 20 MHz). Here, when the terminal's transmission spans two LBT subbands, the occupancy of each of the corresponding LBT subbands must meet the 80% limit. In other words, when the terminal's transmission occupies any N LBT subbands, the occupancy of any of the N LBT subbands must meet the 80% limit.

[0036] 2. R16 NR-V2X Frequency Domain Resource Configuration The parameters related to the frequency domain resource configuration of the resource pool are shown in Table 1 below. [Table 1]

[0037] In the R16 stage, the resource pool of NR-V2X (New Radio-Vehicle to everything) only supports consecutive PRBs in the frequency domain, and if the PRBs configured in the resource pool are not an integer multiple of the subchannel size, it is determined that extra PRBs will not be used to reduce excessive corrections to already formed conclusions.

[0038] As shown in FIG. 1, assuming that the frequency domain includes a total of 58 PRBs and each subchannel includes 10 consecutive PRBs, the frequency domain includes a total of 5 subchannels and 8 Remaining RBs, and the starting PRB index of subchannel 1 is 4 (the index of the lowest PRB in the resource pool is 0). In the resource pool, the resources available for transmission are subchannels 1 to 5, with four Remaining RBs on both the upper and lower sides not used for transmission. Only consecutive subchannels can be used as transmission resources for a device (for example, the transmission of the terminal shown in FIG. 1 occupies subchannel #2 and subchannel #3).

[0039] 3. IRB In the NR-U system, an IRB design is introduced in consideration of regulatory requirements, i.e., two consecutive available resource blocks are separated by M resource blocks. For an IRB index m, the PRBs included therein are {m, m+M, m+2M, m+3M, ...}, where m∈{0, 1, ..., M-1}. That is, one IRB includes multiple PRBs, and the interval between the PRBs is M. In the NR-U system, IRB structures are defined for two subcarrier intervals, 15 kHz and 30 kHz, as shown in Table 2 below. [Table 2]

[0040] For example, as shown in Figure 2, IRB#0 includes PRB#0, PRB#5, PRB#10, and PRB#15, IRB#1 includes PRB#1, PRB#6, PRB#11, and PRB#16, and so on. All terminal transmission resources have an IRB granularity, and for example, a terminal transmission occupies IRB#1 or IRB#1+IRB#2.

[0041] Therefore, if a UE needs to occupy four PRBs, if a method of occupying consecutive PRBs (PRB#0 to PRB#3) is adopted, the OCB is 4 / 20=20%. If an IRB design is adopted (IRB#0), the OCB is 16 / 20=80%, which satisfies the OCB requirement.

[0042] 4. Channel Access A terminal operating in an unlicensed band must perform channel detection before accessing a channel, and can access the channel to transmit a pending service only when it detects that the channel is idle. Here, channel access methods include the following methods:

[0043] (1) Type 1 channel access method The terminal first determines the channel access priority and then determines the relevant parameters for channel access. The flow is as follows:

[0044] Step 1: Set the counter to N=N int where N int is 0 to CW p It is a random number uniformly distributed between . Then, proceed to Step 4.

[0045] Step 2: If N>0, the terminal subtracts 1 from the counter, that is, N=N-1.

[0046] Step 3: A monitoring slot with a time length of Tsl (Tsl indicates an LBT monitoring slot, and its time length is 9 μs) is detected for the channel. If the monitoring slot is idle, proceed to Step 4; otherwise, proceed to Step 5.

[0047] Step 4: If N=0, the channel connection process is terminated; otherwise, go to Step 2.

[0048] Step 5: The time length is T for the channel. d (Td =16+m p The result of the time interval detection is that at least one monitoring slot is occupied or all monitoring slots are idle.

[0049] Step 6: The channel monitoring result is T d If all monitoring slots in the time are idle, go to Step 4; otherwise, go to Step 5.

[0050] When the channel access process is completed, the terminal can use the channel to transmit the pending service. The maximum time that the terminal can transmit using the channel is T mcot,p cannot be surpassed.

[0051] The parameter values for each step are shown in Table 3 below. [Table 3]

[0052] (2) Type 2 channel access method The Type 2 channel access method is a channel access method based on a fixed channel monitoring time length, and includes the following three methods.

[0053] Type 2A channel access: The UE monitors the channel for at least 25us before starting transmission, and transmits after successful channel monitoring.

[0054] Type 2B channel access: The UE monitors the channel for 16us before starting transmission, and transmits after successful channel monitoring.

[0055] Type 2C channel access: The UE transmits directly without channel monitoring, where the gap between the start of the current transmission and the end of the previous transmission is less than or equal to 16 us, and the duration of the transmission does not exceed 584 us.

[0056] Hereinafter, with reference to the drawings, a sidelink resource selection method, device, and terminal according to an embodiment of the present disclosure will be described in detail based on specific examples and application scenarios.

[0057] As shown in Fig. 3, an embodiment of the present disclosure provides a sidelink resource selection method, which includes obtaining configured or pre-configured resource pool configuration information, where the resource pool configuration information includes frequency domain resource configuration information and / or subchannel configuration information, and the subchannel includes an interlaced resource block (IRB).

[0058] That is, the resource pool configuration information in the embodiments of the present disclosure may specifically include definitions of subchannels of an IRB structure and other related content and / or frequency domain resource configuration information.

[0059] It should be noted that the embodiment of the present disclosure may specifically be, but is not limited to, a method for performing resource selection for a sidelink terminal operating in an unlicensed band.

[0060] A sidelink resource selection method according to an embodiment of the present disclosure acquires configured or pre-configured resource pool configuration information, the resource pool configuration information including frequency domain resource configuration information and / or subchannel configuration information, where the subchannels include interlaced resource blocks (IRBs). Therefore, subchannels in a resource pool configured based on the resource pool configuration information include discretely distributed PRBs, so that resources selected during resource selection in the resource pool can satisfy OCB and PSD constraints. This provides a complete implementation of a sidelink resource selection mechanism operating in unlicensed bands.

[0061] In one embodiment, the sub-channel setting information includes at least one of sub-channel indication information, a correspondence between the sub-channel and an IRB, and a size of the sub-channel.

[0062] In one specific embodiment, the correspondence relationship between the sub-channel and the IRB includes at least one of the following:

[0063] (1) One subchannel corresponds to N consecutive IRBs located in the same resource pool, where N is a configured or preset positive integer, and the resource pool is configured based on the resource pool configuration information.

[0064] (2) One subchannel corresponds to N consecutive IRBs located in the same resource block set (RB set), where N is a set or preset positive integer.

[0065] Note that here, the resource block set may be an LBT subband or the basic frequency domain granularity of LBT (i.e., 20 MHz), and N may simply be 1, and N consecutive IRBs refer to N IRBs with consecutive IRB indices.

[0066] As a specific example of this specific embodiment, as shown in Figure 5, the resource pool includes two LBT subbands, the SCS is set to 30 kHz, and each RB set / LBT subband includes 50 PRBs, so each IRB in the resource pool includes 20 PRBs. In this case, the above correspondence relationship between subchannels and IRBs is specifically as follows:

[0067] Scheme 1: One subchannel corresponds to one IRB in the resource pool (ie, N=1).

[0068] In this case, the subchannels correspond to IRBs in the resource pool. As shown in Correspondence 1 in Figure 5, one subchannel corresponds to one IRB in one resource pool, that is, one subchannel includes 20 PRBs. For example, subchannel #1 is IRB #1, and the corresponding PRB indices are {PRB #1, PRB #6, PRB #11, ..., PRB #96}, and subchannel #2 is IRB #2, and the corresponding PRB indices are {PRB #2, PRB #7, PRB #12, ..., PRB #97}.

[0069] Scheme 2: A subchannel corresponds to one IRB in one LBT subband / RB set (ie, when N=1).

[0070] In this case, a subchannel corresponds to an IRB in an LBT subband. As shown in Correspondence Relationship 2 in Figure 5, one subchannel includes a portion of one IRB located in a certain LBT subband. For example, subchannel #1 includes a portion of IRB #1 located in LBT subband 1. In this case, one subchannel includes 10 PRBs, and the indices of the PRBs corresponding to subchannel #1 are {PRB #1, PRB #6, PRB #11, ..., PRB #46}, and the indices of the PRBs corresponding to subchannel #6 are {PRB #51, PRB #56, PRB #61, ..., PRB #96}.

[0071] Furthermore, in one embodiment, when the N consecutive IRBs are located in the same resource pool, the indication information of the subchannel includes any one of the index of a starting IRB and the number of IRBs in the N consecutive IRBs, and the indexes of all IRBs in the N consecutive IRBs.

[0072] For example, the starting IRB and the (N-1) following IRBs in a resource pool are the first subchannel, the second IRB and the (N-1) following IRBs are the second subchannel, and so on, where the starting IRB does not necessarily correspond to the IRB with the smallest IRB index.

[0073] Alternatively, the starting IRB and the (N-1) following IRBs in the resource pool are the first subchannel, the Nth IRB and the (N-1) following IRBs are the second subchannel, and so on. Here, the starting IRB does not necessarily correspond to the IRB with the smallest IRB index. With this configuration, different subchannels do not overlap in the frequency domain, i.e., different subchannels are frequency-division multiplexed.

[0074] In such a correspondence relationship, the number of subchannels is independent of the number of LBT subbands included in the resource pool, i.e., when the resource pool includes multiple LBT subbands, the number of subchannels remains unchanged. In this way, the complexity of subchannel indication can be reduced, and the indication overhead can be reduced to a certain extent.

[0075] Furthermore, as another embodiment, when the N consecutive IRBs are located in the same resource block set, the indication information of the subchannel includes at least one of the index of the same resource block set, the index of the starting IRB in the N consecutive IRBs, the number of IRBs, and the indexes of all IRBs in the N consecutive IRBs.

[0076] For example, if N=1, the indication information of the subchannel may only include the index of the same resource block set and the index of an IRB. If N is greater than 1, the indication information of the subchannel 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. Alternatively, if N is greater than 1, the indication information of the subchannel may include the index of the same resource block set and the indexes of all IRBs in the N consecutive IRBs.

[0077] For example, if one resource pool contains one RB set, the starting IRB and the (N-1) following IRBs are the first subchannel, the second IRB and the (N-1) following IRBs are the second subchannel, and so on.

[0078] Alternatively, if one resource pool includes one RB set, the starting IRB and the following (N-1) IRBs are the first subchannel, the Nth IRB and the following (N-1) IRBs are the second subchannel, etc. With this configuration, different subchannels do not overlap in the frequency domain, i.e., different subchannels are frequency-division multiplexed.

[0079] In another example, when a resource pool includes multiple RB sets, the first IRB and the (N-1) following IRBs of the first RB set are the first subchannel, and the following (N-1) IRBs and the first IRB are located in the same RB set. The second IRB and the (N-1) following IRBs of the first RB set are the second subchannel, and these N IRBs are located in the same RB set. The first IRB and the (N-1) following IRBs of the second RB set are the (m+1)th subchannel, and similarly, these N IRBs must be located in the same RB set. The second IRB and the (N-1) following IRBs of the second RB set are the (m+2)th subchannel, where m represents the number of subchannels in the first RB set. And so on.

[0080] Alternatively, if a resource pool includes multiple RB sets, the first IRB and the (N-1) following IRBs of the first RB set are the first subchannel, and the following (N-1) IRBs and the first IRB are located in the same RB set. The Nth IRB and the (N-1) following IRBs of the first RB set are the second subchannel, and these N IRBs are located in the same RB set. The first IRB and the (N-1) following IRBs of the second RB set are the (m+1) following subchannel, and similarly, these N IRBs must be located in the same RB set. The Nth IRB and the (N-1) following IRBs of the second RB set are the (m+2) following subchannel, and these N IRBs are located in the same RB set. m indicates the number of subchannels of the first RB set. This applies, and so on.

[0081] As a first specific example, as shown in Figure 6, the resource pool includes two RB sets, the SCS is 30 kHz, and there are a total of 100 PRBs. If one subchannel occupies two IRBs, the subchannel index is as follows: Subchannel 1 is the portion of IRB#5 and IRB#1 that is located in RB set#1. Subchannel 2 is the portion of IRB#1 and IRB#2 that is located in RB set#1. Subchannel 3 is the portion of IRB#2 and IRB#3 that is located in RB set#1. Subchannel 4 is the portion of IRB#3 and IRB#4 that is located in RB set#1. Subchannel 5 is the portion of IRB#5 and IRB#1 that is located in RB set#2. Subchannel 6 is the portion of IRB#1 and IRB#2 that is located in RB set#2. Subchannel 7 is the portion of IRB#2 and IRB#3 that is located in RB set#2. Subchannel 8 is the portion of IRB#3 and IRB#4 that is located in RB set#2.

[0082] 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.

[0083] As a second specific example, as shown in Figure 6, the resource pool includes two RB sets, the SCS is 30 kHz, and there are a total of 100 PRBs. If one subchannel occupies two IRBs, the subchannel index is as follows:

[0084] Subchannel 1 is the portion of IRB#5 and IRB#1 that is located in RB set#1. Subchannel 2 is the portion of IRB#2 and IRB#3 that is located in RB set#1. Subchannel 3 is the portion of IRB#5 and IRB#1 that is located in RB set#2. Subchannel 4 is the portion of IRB#2 and IRB#3 that is located in RB set#2.

[0085] As a third specific example, as shown in Figure 6, the resource pool includes two RB sets, the SCS is 30 kHz, and there are a total of 100 PRBs. If one subchannel occupies one IRB, the subchannel index is as follows:

[0086] 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. 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.

[0087] As a fourth specific example, as shown in Figure 6, the resource pool includes two RB sets, the SCS is 30 kHz, and there are a total of 100 PRBs. If one subchannel occupies one IRB, the subchannel index is as follows:

[0088] Subchannel 1 is IRB#5, subchannel 2 is IRB#1, subchannel 3 is IRB#2, subchannel 4 is IRB#3, and subchannel 5 is IRB#4.

[0089] As a fifth specific example, as shown in Figure 6, the resource pool includes two RB sets, the SCS is 30 kHz, and there are a total of 100 PRBs. If one subchannel occupies two IRBs, the subchannel indexes are as follows:

[0090] Subchannel 1 is IRB#5 and IRB#1, subchannel 2 is IRB#1 and IRB#2, subchannel 3 is IRB#2 and IRB#3, and subchannel 4 is IRB#3 and IRB#4.

[0091] As a sixth specific example, as shown in Figure 6, the resource pool includes two RB sets, the SCS is 30 kHz, and there are a total of 100 PRBs. If one subchannel occupies two IRBs, the subchannel indexes are as follows:

[0092] Subchannel 1 is IRB#5 and IRB#1, and subchannel 2 is IRB#2 and IRB#3.

[0093] As a seventh specific example, as shown in Figure 6, the resource pool includes two RB sets, the SCS is 30 kHz, and there are a total of 100 PRBs. If one subchannel occupies two IRBs, the subchannel indexes are as follows:

[0094] Sub-channel 1 is IRB#1 and IRB#2, and sub-channel 2 is IRB#3 and IRB#4.

[0095] As can be seen from the above, in this correspondence, the subchannels have a smaller granularity but can support more complex service types. For example, when transmitting small service packets, using correspondence 1 results in lower spectrum utilization, but using correspondence 2 results in more complex instructions and greater instruction overhead than correspondence 1.

[0096] In addition, in the case of correspondence relationship 2, that is, when a subchannel includes N IRBs located in the same RB set, any of the following methods can be adopted for numbering the subchannels.

[0097] Method 1: Subchannels of each RB set are sequentially and jointly numbered. For example, if RB set #1 and RB set #2 each contain five subchannels, the subchannel numbers are 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, respectively. Among them, subchannels 1 to 5 correspond to the five subchannels of RB set #1, and subchannels 6 to 10 correspond to the five subchannels of RB set #2.

[0098] Method 2: The subchannels of each RB set are numbered independently in sequence. For example, if RB set #1 and RB set #2 each contain five subchannels, the numbers of the two RB sets are 1, 2, 3, 4, and 5. When a terminal specifies resources, it must specify not only the subchannel numbers but also the RB set numbers.

[0099] In one embodiment, the size of the sub-channels includes one of: the resource pool supports sub-channels of different sizes; and the resource pool supports only sub-channels of the same size.

[0100] That is, depending on whether the guard band is available for transmission and whether some RBs in the IRBs other than the guard band are available for transmission, the resource pool may be configured to support subchannels of different sizes, or the resource pool may be configured to support subchannels of the same size.

[0101] Therefore, the resource pool configuration information may further include configuration information of remaining resource blocks (Remaining RBs) to indicate PRBs unavailable for transmission or IRBs unavailable for transmission.

[0102] Specifically, the physical resource blocks PRBs included in the subchannel are all PRBs located outside the guard bands among N consecutive IRBs. This method can fully utilize frequency resources and improve frequency utilization. Note that, if a resource pool supports subchannels of different sizes or there is no limit to the size of the subchannels supported by the resource pool, the physical resource blocks PRBs included in the subchannel are all PRBs located outside the guard bands among N consecutive IRBs.

[0103] Alternatively, the PRBs included in the subchannel are all PRBs located outside the guard band and remaining resource blocks RB among N consecutive IRBs. Similarly, if a resource pool supports subchannels of the same size, or if there is no limit to the size of the subchannels supported by the resource pool, the PRBs included in the subchannel are all PRBs located outside the guard band among N consecutive IRBs.

[0104] That is, when subchannels of the same size are supported within a resource pool, the number of PRBs included in the corresponding IRBs of each subchannel may be different after excluding the guard band. In this case, depending on the minimum number of PRBs included in different subchannels, some PRBs in the subchannels corresponding to IRBs with a number of PRBs greater than the minimum value must be disabled for transmission, to ensure that the number of PRBs included in each subchannel is the same. This method can reduce the processing complexity of the UE to a certain extent, and for example, it is not necessary to consider different subchannel sizes when calculating the TBS.

[0105] Alternatively, the PRBs included in the subchannel are all PRBs among N consecutive IRBs. Similarly, if a resource pool supports subchannels of different sizes or there is no limit to the size of the subchannels supported by the resource pool, the PRBs included in the subchannel are all PRBs among N consecutive IRBs.

[0106] That is, in the above embodiment, the following methods can be used as a method for using guard bands in a resource pool.

[0107] Either the frequency domain resources corresponding to the guard band are unavailable for transmission, or the frequency domain resources corresponding to the guard band are available for transmission.

[0108] For example, if the transmission resource is equal to or smaller than one LBT subband bandwidth, the terminal cannot use the frequency domain resource corresponding to the guard band during transmission. If the transmission resource is larger than one LBT subband bandwidth, the terminal can use the frequency domain resource corresponding to the guard band during transmission.

[0109] Furthermore, in one specific embodiment, the method further includes determining a transmission block size (TBS) based on a pre-agreed subchannel size, or determining the transmission block size based on whether a guard band is used for the transmission, or determining the transmission block size based on frequency domain resources used for the actual transmission.

[0110] Determining the transmission block size (TBS) based on the pre-agreed subchannel size may involve determining the TBS based on, for example, the maximum, minimum, or average size of the subchannel.

[0111] Determining the transmission block size based on whether a guard band is used for transmission means, for example, that if the terminal's transmission occupies only one subchannel and is located within one subband, the guard band is unavailable for transmission, and therefore the transmission block size is determined based on the size of the current subchannel (excluding the guard band); on the other hand, if the terminal's transmission occupies resources larger than one subband, the guard band is available for transmission, and therefore the transmission block size is determined based on the current subchannel size (excluding the guard band).

[0112] Determining the transmission block size based on the frequency domain resources used for actual transmission may involve, for example, the terminal determining the maximum transmission block size that can be supported based on all frequency domain resources of the resource pool, and then further converting the size based on the resources used for actual transmission.

[0113] It should be noted that, in this specific embodiment, if the resource pool supports subchannels of different sizes, or if there is no restriction on the subchannel sizes supported by the resource pool, the transmission block size may be determined based on the above three methods.

[0114] As a specific example of the above embodiment, as shown in Figure 7, the resource pool includes two RB sets, the SCS is 30 kHz, and one LBT subband has 51 available PRBs other than the guard band. If one subchannel corresponds to one IRB, for LBT subband 1, IRB#5 includes 11 PRBs, and the other four IRBs include 10 PRBs. therefore,

[0115] If the correspondence between subchannels and IRBs is 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, subchannel 2 (IRB#1), subchannel 4 (IRB#3) and subchannel 5 (IRB#4) contain 20 PRBs, and the calculation of the final transport block size (TBS) can be determined based on subchannel 1 / 3 or subchannel 2 / 4 / 5.

[0116] 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, one PRB in one IRB#5 and one PRB in one IRB#2 can be set as a Remaining RB, i.e., set not to be used for service transmission, thereby ensuring that the number of PRBs contained in each subchannel is the same.

[0117] If the correspondence between subchannels and IRBs is that one subchannel corresponds to N consecutive IRBs located in the same RB set, and the resource pool supports different subchannel sizes, taking the first LBT subband as an example, subchannel 1 (IRB#5) includes 11 PRBs, subchannel 2 (IRB#1), subchannel 3 (IRB#2), subchannel 4 (IRB#3) and subchannel 5 (IRB#4) each include 10 PRBs, and the calculation of the final TBS can be determined based on subchannel 1 or subchannels 2 / 3 / 4 / 5.

[0118] 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 the Remaining RB, thereby ensuring that each subchannel contains 10 PRBs.

[0119] In one specific embodiment, the frequency domain resource configuration information includes at least one of a starting IRB index of a resource pool, a starting PRB index of a resource pool, the number of subchannels, the number of IRBs included in the subchannel, and configuration information of the remaining resource blocks.

[0120] The starting IRB index of the resource pool is the first IRB corresponding to the resource pool, and may be understood as the starting IRB of the first subchannel. The starting PRB index of the resource pool is the first PRB corresponding to the resource pool, and may be understood as the starting PRB of the first subchannel. Note that the frequency domain resource configuration information may include both the starting IRB index of the resource pool and the starting PRB index of the resource pool. The size of the resource pool is the number of IRBs included in the subchannel.

[0121] The sidelink resource selection method according to the embodiments of the present disclosure can reduce the complexity of UE instructions by establishing a correspondence between subchannels (the smallest granularity of resource allocation) and IRBs, and lay the foundation for service transmission and resource allocation mechanisms, ensuring that the selected resources meet the OCB and PSD restriction requirements, thereby providing a complete implementation of the sidelink resource selection mechanism operating in unlicensed bands.

[0122] The embodiments of the present disclosure further provide a sidelink resource selection method, as shown in Figure 4. The sidelink resource selection method includes the following steps:

[0123] In step 401, first resources for transmitting a Physical Sidelink Control Channel (PSCCH) and a Physical Sidelink Shared Channel (PSCCH) are selected from a resource pool and / or second resources for transmitting a Physical Sidelink Feedback Channel (PSFCH) are selected from the resource pool.

[0124] Here, if the resource pool supports HARQ feedback, the sidelink resource selection method according to the embodiment of the present disclosure includes the above step of selecting a second resource from the resource pool for transmitting a PSFCH.

[0125] In one embodiment, in step 401, selecting first resources for transmitting the PSCCH and the PSSCH includes preferentially selecting the first resources from the same LBT subband.

[0126] Specifically, in this embodiment, when the resource pool includes multiple LBT subbands and the bandwidth required for transmission of the user equipment UE is equal to or smaller than one of the LBT subbands, the first resource may be preferentially selected from the same LBT subband, or may be preferentially selected from the same LBT subband even if there is no constraint.

[0127] Furthermore, in one embodiment, if the first resource cannot be selected from the same LBT subband, the first resource is selected from multiple LBT subbands in the resource pool, or if the first resource cannot be selected from the same LBT subband, the first resource is selected from resource sets of all the LBT subbands.

[0128] It should be noted that this embodiment is not only applicable to single transmission (i.e., the resources for the UE's initial transmission or a retransmission are preferentially selected from resources located in the same LBT subband), but also to multiple transmissions (i.e., the initial transmission and retransmission should both preferentially select resources located in the same LBT subband). In this embodiment, all transmission resources are preferentially selected from one LBT subband, which can reduce the complexity of LBT from the perspective of LBT. In this case, it is only necessary to monitor whether one LBT subband is idle, which can reduce the probability of transmission failure due to LBT failure and further ensure the efficiency and reliability of transmission.

[0129] In one specific embodiment, in step 401, selecting first resources from a resource pool for transmitting the physical sidelink control channel PSCCH and the physical sidelink shared channel PSCCH includes the following steps:

[0130] (1) Determine the available resource sets of each LBT subband based on the resource exclusion result. That is, after performing resource exclusion, the UE determines the available resource sets S_A of different LBT subbands. i where i denotes the index of the LBT subband.

[0131] After determining each available resource set, the physical layer of the UE reports the available resource set of each LBT subband to a Media Access Control (MAC) layer.

[0132] (2) Select the first resource from any of the available resource sets. That is, the UE first selects the first resource from any of the available resource sets. i If the first resource cannot be selected from the first available resource set (S_A1), the first resource is selected from the second available resource set (S_A2), and this process is repeated until the first resource is selected.

[0133] Furthermore, the method further includes selecting the first resource from at least two of the available resource sets if the first resource cannot be selected from any of the respective available resource sets. i If no resource can be selected from S_A, the UE selects a transmission resource from S_A, where S_A is a resource that is at least two S_A i or S_A contains resources in S_A i Contains all resources in

[0134] It should be noted that the resource selection method according to this specific embodiment preferentially selects all transmission resources from one LBT subband and monitors whether only one LBT subband is idle, thereby reducing the complexity of LBT from the perspective of LBT, thereby reducing the probability of transmission failure due to LBT failure, further ensuring the efficiency and reliability of transmission, and increasing the probability of channel access.

[0135] As a specific example of this specific embodiment, as shown in Figure 8, after resource elimination, four available resources (R1, R2, R3, and R4) are determined. Here, the number of transmissions of the UE is two, that is, two resources need to be selected. Because R1 spans two LBT subbands, and R2 and R3, and R4 and R3 are located in different LBT subbands, the UE should preferentially select R2 / R4 as the transmission resource.

[0136] In one embodiment, in step 401, in selecting second resources from the resource pool for transmitting a physical sidelink feedback channel (PSFCH), if a PSSCH corresponding to the PSFCH is located in multiple LBT subbands and the second resources are simultaneously mapped to the multiple LBT subbands, the step of selecting the second resources includes any one of the following: (1) Select the second resource based on a slot index and a starting subchannel index of a PSSCH corresponding to the PSFCH. That is, when a UE occupies multiple LBT subbands, the PSFCH resource (second resource) is simultaneously mapped to multiple LBT subbands, and the mapping method of the PSFCH resource (second resource) is to map the PSFCH resource based on the slot number and starting subchannel number of the associated PSSCH, where, when a UE occupies multiple LBT subbands, the indexes of the PSSCH transmission resources corresponding to the PSFCH in each LBT subband are independently numbered. (2) Select the second resource based on the slot index of the PSSCH corresponding to the PSFCH and the index of the subchannel corresponding to the first resource in each of the LBT subbands.

[0137] That is, when a UE occupies multiple LBT subbands, a PSFCH resource (second resource) is simultaneously mapped to multiple LBT subbands, and the mapping method between a PSSCH resource (first resource) and a PSFCH resource (second resource) is to map the PSFCH resource based on the slot number of the associated PSSCH and the subchannel number occupied by the PSSCH transmission. That is, when mapping to different LBT subbands, the PSFCH resource is mapped based on the subchannel number occupied by the PSSCH transmission in the corresponding LBT subband.

[0138] Furthermore, when the PSSCH corresponding to the PSFCH is located in a single LBT subband and the second resource is simultaneously mapped to the multiple LBT subbands, selecting the second resource includes any one of the following: (1) Select the second resource based on a slot index and a starting subchannel index of a PSSCH corresponding to the PSFCH. (2) Selecting the second resource based on a slot index of a PSSCH corresponding to the PSFCH and an index of a subchannel corresponding to the first resource in each of the LBT subbands.

[0139] In this embodiment, the probability of successful PSFCH transmission can be increased by mapping PSFCH resources to multiple subbands simultaneously, and the method of mapping PSFCH resources to multiple subbands is clearly defined, making it applicable to the scenario of multi-LBT subbands in the sidelink of unlicensed bands.

[0140] Specifically, the starting subchannel is a starting subchannel within a resource pool of the first resource, or the starting subchannel is a starting subchannel within each of the LBT subbands of the first resource.

[0141] As a specific example of this embodiment, as shown in Figure 9(A), when the mapping method between PSSCH resources (first resources) and PSFCH resources (second resources) is to map PSFCH resources based on the slot number of the associated PSSCH and the number of the subchannel occupied by PSSCH transmission, the feedback resources of two LBT subbands are respectively determined based on all subchannels of the PSSCH located in the corresponding LBT subbands. As shown in Figure 9(B), when the mapping method between PSSCH resources (first resources) and 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, and the starting subchannel is the starting subchannel in each LBT subband, the feedback resources of two LBT subbands may respectively be determined based on the starting subchannel in the corresponding LBT subband of the PSSCH. As shown in Figure 9(C), if the mapping method between the PSSCH resource (first resource) and the PSFCH resource (second resource) is to map the PSFCH resource based on the slot number and the starting subchannel number of the associated PSSCH, and the starting subchannel is the starting subchannel in the first resource, the feedback resources of the two LBT subbands may be determined respectively based on the starting subchannel of the PSSCH.

[0142] Furthermore, in one embodiment, the method further includes a step of transmitting first-stage sidelink control information (SCI), where the first-stage SCI includes a first indication field, and the first indication field indicates the LBT subbands in which the PSCCH and the PSSCH are located in at least one of the following ways:

[0143] It is indicated by P×log2(M), where P is the configured or preset maximum number of SCI reservable resources, and M is the number of LBT subbands included in the first resource pool.

[0144] It is indicated by a bitmap, where the number of bits required is P x M.

[0145] It is indicated by a joint coding method. The resource selection method for side links is as follows: S1: Obtaining resource pool configuration information; S2: Selecting resources in a resource pool corresponding to the resource pool setting information.

[0146] Specifically, the sidelink resource selection method of the embodiment of the present disclosure may improve only the resource pool configuration information in step S1 (for example, adopting the method shown in FIG. 3), or may improve only the resource selection method in step S2 (for example, adopting the method shown in FIG. 4), or may improve steps S1 and S2 simultaneously.

[0147] As shown in Fig. 10, an embodiment of the present disclosure further provides a sidelink resource selection device, which includes: an acquiring module 1001 for acquiring configured or pre-configured resource pool configuration information, where the resource pool configuration information includes frequency domain resource configuration information and / or subchannel configuration information, and the subchannel includes an interlaced resource block (IRB).

[0148] Optionally, the sub-channel setting information includes at least one of sub-channel indication information, a correspondence between a sub-channel and an IRB, and a size of a sub-channel.

[0149] Optionally, the correspondence relationship between the subchannels and IRBs includes at least one of: one subchannel corresponds to N consecutive IRBs located in the same resource pool, where the resource pool is a resource pool configured based on the resource pool configuration information; and one subchannel corresponds to N consecutive IRBs located in the same resource block set, where N is a configured or preset positive integer.

[0150] Optionally, if the N consecutive IRBs are located in the same resource pool, the subchannel indication information includes one of the index of a starting IRB and the number of IRBs in the N consecutive IRBs, and the indexes of all IRBs in the N consecutive IRBs.

[0151] Optionally, if the N consecutive IRBs are located in the same resource block set, the subchannel indication information includes at least one of the index of the same resource block set, the index of the starting IRB in the N consecutive IRBs, the number of IRBs, and the indexes of all IRBs in the N consecutive IRBs.

[0152] Optionally, the size of the sub-channels includes one of: the resource pool supporting sub-channels of different sizes; and the resource pool supporting only sub-channels of the same size.

[0153] Alternatively, if the resource pool supports subchannels of different sizes, the physical resource blocks PRBs included in the subchannels are all PRBs out of N consecutive IRBs that are located outside the guard band, or if the resource pool supports subchannels of the same size, the PRBs included in the subchannels are all PRBs out of N consecutive IRBs that are located outside the guard band and the remaining resource blocks RB, or if the resource pool supports subchannels of the same size, the PRBs included in the subchannels are all PRBs out of N consecutive IRBs.

[0154] Optionally, the apparatus further includes a determination module, which is configured to determine the transmission block size based on a pre-agreed subchannel size, or to determine the transmission block size based on whether a guard band is used for the transmission, or to determine the transmission block size based on frequency domain resources used for the actual transmission.

[0155] Optionally, the frequency domain resource configuration information includes at least one of: a starting IRB index of a resource pool, a starting PRB index of a resource pool, the number of subchannels, the number of IRBs included in the subchannel, and configuration information of the remaining resource blocks.

[0156] It should be noted that the sidelink resource selection device according to the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned embodiment of the sidelink resource selection method according to Fig. 3 and achieve the same technical effects, so detailed descriptions of the parts of this embodiment that are the same as those of the method embodiment and the technical effects thereof will be omitted.

[0157] An embodiment of the present disclosure further provides a sidelink resource selection device, as shown in Fig. 11. The sidelink resource selection device includes a selection module 1101 configured to select first resources for transmitting a physical sidelink control channel PSCCH and a physical sidelink shared channel PSSCH from a resource pool, and / or select second resources for transmitting a physical sidelink feedback channel PSFCH from the resource pool.

[0158] Optionally, the selection module 1101 includes a first selection submodule configured to, when the resource pool includes multiple LBT subbands and the bandwidth required for transmission of the user equipment UE is equal to or smaller than one of the LBT subbands, preferentially select the first resource from the same LBT subband.

[0159] Optionally, the selection module 1101 includes a second selection submodule configured to select the first resource from among the plurality of LBT subbands of the resource pool.

[0160] Optionally, the selection module 1101 includes a determination submodule configured to determine an available resource set for each of the LBT subbands based on the resource exclusion result, and a third selection submodule configured to select the first resource from any of the available resource sets.

[0161] Furthermore, the selection module 1101 further includes a fourth selection sub-module configured to select the first resource from at least two of the available resource sets when the first resource cannot be selected from any of the available resource sets.

[0162] Alternatively, when a PSSCH corresponding to the PSFCH is located in multiple LBT subbands and the second resource is simultaneously mapped to the multiple LBT subbands, the selection module 1101 selects the second resource specifically by selecting the second resource based on a slot index and a starting subchannel index of the PSSCH corresponding to the PSFCH, or by selecting the second resource based on a slot index of the PSSCH corresponding to the PSFCH and an index of a subchannel corresponding to the first resource in each of the LBT subbands.

[0163] Alternatively, the starting subchannel is a starting subchannel within a resource pool of the first resource, or the starting subchannel is a starting subchannel within each of the LBT subbands of the first resource.

[0164] Optionally, the device further includes a transmitting module used for transmitting first-stage sidelink control information (SCI), where the first-stage SCI includes a first indication field, which indicates the LBT subbands on which the PSCCH and the PSSCH are located by at least one of a P×log2(M) indication scheme, where P is a configured or preset maximum number of reservable resources for the SCI and M is the number of LBT subbands included in the first resource pool, a bitmap indication scheme, where the number of required bits is P×M, and a joint coding scheme.

[0165] Optionally, the resource pool in the embodiment of the present disclosure is a resource pool configured based on resource pool configuration information in the above-mentioned sidelink resource selection method.

[0166] It should be noted that the sidelink resource selection device according to the embodiment of the present disclosure can implement all the method steps implemented by the embodiment of the sidelink resource selection method described in Figure 4 and achieve the same technical effects, so detailed descriptions of the parts of this embodiment that are the same as those of the method embodiment and the technical effects thereof will be omitted.

[0167] As shown in Fig. 12, an embodiment of the present disclosure provides a terminal. The terminal includes a transceiver 1210, a memory 1220, a processor 1200, and a computer program stored in the memory 1220 and executed by the processor 1200. When the processor 1200 executes the computer program, the computer program can realize each process of each of the above-described embodiments of the sidelink resource selection method and achieve the same technical effect. To avoid repetition, the description will be omitted here.

[0168] The transceiver 1210 is used to transmit and receive data under the control of the processor 1200 .

[0169] In FIG. 12 , the bus architecture may include any number of interconnected buses and bridges, specifically connecting various circuits between one or more processors, represented by processor 1200, and memory, represented by memory 1220. The bus architecture may also connect various other circuits, such as peripherals, regulators, and power management circuits. These are all well known in the art and will not be further described here. The bus interface provides an interface. The transceiver 1210 may be multiple components, i.e., includes a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium. For different user equipment, the user interface 1230 may be an interface that can connect to required devices, either externally or internally, including, but not limited to, a keypad, a display, a speaker, a microphone, a joystick, etc.

[0170] The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 may store data used by the processor 1200 in performing operations.

[0171] Those skilled in the art will understand that all or part of the steps of the above embodiments may be realized by hardware, or may be realized by instructing relevant hardware by a computer program, the computer program including instructions for executing some 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 type of storage medium.

[0172] In addition, the embodiments of the present disclosure further provide a computer-readable storage medium, which stores a program, which, when executed by a processor, realizes each process of the above-mentioned embodiments of the sidelink resource selection method and achieves the same technical effects. To avoid redundancy, the computer-readable storage medium may be, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0173] Although the preferred embodiments of the present disclosure have been described above, those skilled in the art may make some improvements and modifications without departing from the principles of the present disclosure, and these improvements and modifications should also be considered as part of the scope of protection of the present disclosure.

Claims

1. A sidelink resource selection method, comprising: obtaining configured or pre-configured resource pool configuration information; The resource pool configuration information includes frequency domain resource configuration information and / or sub-channel configuration information, and the sub-channel includes an interlaced resource block (IRB). Sidelink resource selection method.

2. The sub-channel setting information includes: Sub-channel indication information, The correspondence between subchannels and IRBs, and the size of the sub-channel; The sidelink resource selection method according to claim 1 .

3. The correspondence between the sub-channels and the IRBs is: One subchannel corresponds to N consecutive IRBs located in the same resource pool, and the resource pool is a resource pool configured based on the resource pool configuration information; one subchannel corresponds to N consecutive IRBs located in the same resource block set; where N is a set or preset positive integer. The sidelink resource selection method according to claim 2.

4. If the N consecutive IRBs are located in the same resource pool, the indication information of the subchannels may be: An index of a starting IRB and the number of IRBs in the N consecutive IRBs; and the indexes of all IRBs in the N consecutive IRBs; The sidelink resource selection method according to claim 3.

5. If the N consecutive IRBs are located in the same resource block set, the indication information of the subchannels may include at least: the index of the same resource block set; the index of a starting IRB among the N consecutive IRBs; the number of IRBs, and the indices of all IRBs in the N consecutive IRBs; The sidelink resource selection method according to claim 3.

6. The size of the subchannel is: the resource pool supporting subchannels of different sizes; the resource pool only supports subchannels of the same size. The sidelink resource selection method according to claim 2.

7. If the resource pool supports subchannels of different sizes, the physical resource blocks PRBs included in the subchannels are all PRBs located outside the guard bands among N consecutive IRBs, or If the resource pool supports subchannels of the same size, the PRBs included in the subchannels are all PRBs located outside the guard band and remaining resource blocks RB among N consecutive IRBs, or If the resource pool supports subchannels of the same size, the PRBs included in the subchannels are all PRBs among N consecutive IRBs. The sidelink resource selection method according to claim 6.

8. The sidelink resource selection method includes: determining a transmission block size based on a pre-agreed size of a sub-channel; or determining a transmission block size based on whether a guard band is used in the transmission; or determining a transmission block size based on frequency domain resources used for actual transmission; The sidelink resource selection method according to claim 2.

9. The frequency domain resource configuration information The starting IRB index of the resource pool, the starting PRB index of the resource pool, the number of sub-channels, the number of IRBs contained in the subchannel, and configuration information for the remaining resource blocks; The sidelink resource selection method according to claim 1 .

10. A sidelink resource selection method, comprising: - selecting first resources from a resource pool for transmitting a physical sidelink control channel PSCCH and a physical sidelink shared channel PSSCH; and / or selecting second resources from the resource pool for transmitting a physical sidelink feedback channel (PSFCH), Sidelink resource selection method.

11. The step of selecting first resources from a resource pool for transmitting a physical sidelink control channel PSCCH and a physical sidelink shared channel PSSCH comprises: selecting the first resource from the same LBT subband; The method for selecting resources for a sidelink according to claim 10.

12. The sidelink resource selection method includes: If the first resource cannot be selected from the same LBT subband, selecting the first resource from a plurality of the LBT subbands of the resource pool. The method for sidelink resource selection according to claim 11.

13. The step of selecting first resources from a resource pool for transmitting a physical sidelink control channel PSCCH and a physical sidelink shared channel PSSCH comprises: determining an available resource set for each LBT subband based on the resource exclusion result; selecting the first resource from any of the available resource sets; The method for selecting resources for a sidelink according to claim 10.

14. The sidelink resource selection method includes: If the first resource cannot be selected from any of the available resource sets, selecting the first resource from at least two of the available resource sets. The sidelink resource selection method according to claim 13.

15. selecting second resources from the resource pool for transmitting a physical sidelink feedback channel (PSFCH), When a PSSCH corresponding to the PSFCH is located in a plurality of LBT subbands and the second resource is simultaneously mapped to the plurality of LBT subbands, selecting the second resource includes: selecting the second resource based on a slot index and a starting subchannel index of a PSSCH corresponding to the PSFCH; Selecting the second resource based on a slot index of a PSSCH corresponding to the PSFCH and an index of a subchannel corresponding to the first resource in each of the LBT subbands. The method for selecting resources for a sidelink according to claim 10.

16. The starting subchannel is a starting subchannel in a resource pool of the first resources, or The starting subchannel is a starting subchannel in each of the LBT subbands of the first resource; The sidelink resource selection method according to claim 15.

17. The sidelink resource selection method includes: transmitting first phase sidelink control information (SCI); The first stage SCI includes a first indication field, the first indication field comprising: A P×log2(M) scheme, where P is the configured or pre-configured maximum number of reservable resources for an SCI, and M is the number of LBT subbands included in the first resource pool; A bitmap scheme where the number of required bits is P x M, and Indicating the LBT subbands in which the PSCCH and PSSCH are located by at least one of the following: a joint coding scheme; The method for selecting resources for a sidelink according to claim 10.

18. The resource pool is a resource pool set based on resource pool setting information in the side link resource selection method according to any one of claims 1 to 9. The method for selecting resources for a sidelink according to claim 10.

19. A sidelink resource selection device, comprising: an acquisition module for acquiring configured or pre-configured resource pool configuration information; The resource pool configuration information includes frequency domain resource configuration information and / or sub-channel configuration information, and the sub-channel includes an interlaced resource block (IRB). Sidelink resource selection device.

20. A sidelink resource selection apparatus, comprising: a selection module; The selection module: selecting first resources from a resource pool for transmitting a physical sidelink control channel PSCCH and a physical sidelink shared channel PSSCH; and / or selecting second resources from the resource pool for transmitting a physical sidelink feedback channel (PSFCH). Sidelink resource selection device.

21. A terminal, a transceiver, a memory, a processor, and a computer program stored in the memory and executed by the processor; When the processor executes the computer program, the processor realizes the side link resource selection method according to any one of claims 1 to 9 or the side link resource selection method according to any one of claims 10 to 18. Terminal.

22. A readable storage medium, comprising: a program or instructions stored therein, the program or instructions being executed by a processor to implement the side link resource selection method according to any one of claims 1 to 9 or the side link resource selection method according to any one of claims 10 to 18; Readable storage medium.

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