Sidelink resource selection method, device and terminal operating in unlicensed spectrum

Abstract

The present disclosure provides a sidelink resource selection method, apparatus, and terminal operating in an unlicensed spectrum, the method applied to a first terminal comprising: performing resource selection to determine transmission resources for PSCCH and PSSCH transmission; and performing the PSCCH and PSSCH transmission, wherein the PSCCH is used to carry first-stage sidelink control information, the first-stage sidelink control information including at least resource indication information, the resource indication information including at least subchannel indication information and / or resource block set indication information.

Description

[Technical Field]

[0001] [CROSS-REFERENCE TO RELATED APPLICATIONS] This disclosure claims priority to Chinese Patent Application No. 202310131416.6, filed in China on February 17, 2023, the entire contents of which are incorporated herein by reference.

[0002] [Technical field] The present disclosure relates to the field of communications technology, and more particularly to a method, apparatus, and terminal for selecting resources for a sidelink operating in an unlicensed spectrum. [Background technology]

[0003] To meet the requirements of occupied channel bandwidth (OCB) and power spectral density (PSD) for terminal devices operating in unlicensed spectrum, the New Radio on Unlicensed Spectrum (NR-U) introduced the Interlaced Resource Block (IRB) structure. In the Sidelink on Unlicensed Spectrum (SL-U) mechanism operating in unlicensed spectrum, the Physical Sidelink Control Channel (PSCCH) and the Physical Sidelink Shared Channel (PSSCH) also support the IRB structure.

[0004] In addition, for PSSCH transmission, the subchannel concept of the R16 / R17 Sidelink is still used in SL-U. In R16 / R17 Sidelink, PSSCH transmission occupies contiguous subchannels in the frequency domain, whereas in SL-U, PSSCH transmission may occupy discontinuous subchannels in the frequency domain. In particular, when a resource pool includes multiple resource block sets (RB sets), PSSCH may be transmitted in multiple RB sets. Therefore, from the frequency domain perspective, the subchannels occupied by PSSCH transmission are no longer contiguous and may occupy subchannels in multiple RB sets. In this case, the original resource indication method of time resource indication value (TRIV) and frequency resource indication value (FRIV) is no longer applicable to SL-U, or can only be completed via multiple FRIVs, which increases the signaling overhead of resource indication. Therefore, a new frequency domain resource indication method needs to be defined. Summary of the Invention [Problem to be solved by the invention]

[0005] A technical objective of the embodiments of the present disclosure is to provide a sidelink resource selection method, device, and terminal operating in an unlicensed spectrum to solve the problems in the related art that the resource indication method is no longer applicable to SL-U or the signaling overhead of resource indication needs to be increased. [Means for solving the problem]

[0006] In order to solve the above technical problems, an embodiment of the present disclosure provides a sidelink resource selection method operating in an unlicensed spectrum, applied to a first terminal, comprising: performing resource selection to determine transmission resources for PSCCH and PSSCH transmissions; and The step of transmitting the PSCCH and PSSCH, wherein the PSCCH is a first stage sidelink control information 1 st the first-stage sidelink control information is used to carry a first-stage SCI, and the first-stage sidelink control information includes at least resource indication information, and the resource indication information includes at least subchannel indication information and / or resource block set indication information.

[0007] Specifically, in the resource selection method as above, the transmission resources occupy one or more sets of contiguous resource blocks.

[0008] Preferably, in the resource selection method as above, the transmission resources corresponding to the different PSCCH and PSSCH transmissions of the same transport block (TB) occupy the same number of resource block sets.

[0009] Preferably In the resource selection method as above, when the transmission resource occupies a plurality of consecutive resource block sets, the transmission resource further comprises: the indexes of the subchannels occupied by the transmission resources in the different resource block sets are consecutive; In the different resource block sets, the subchannels occupied by the transmission resources have consecutive indices; the number of subchannels occupied by the transmission resources in different resource block sets is the same; and At least one of the following conditions is satisfied: the number of sub-channels occupied by the transmission resources in at least one of the resource block sets is different from the number of sub-channels occupied by the transmission resources in the other resource block sets.

[0010] PreferablyIn the resource selection method as described above, when the numbers of sub-channels occupied by the transmission resources in different resource block sets are the same and the indices of the occupied sub-channels are consecutive, the transmission resources are further selected as follows: In different resource block sets, the subchannels occupied by the transmission resources have the same index; and In the different resource block sets, at least one of the IRB indices corresponding to the subchannels occupied by the transmission resources is the same.

[0011] Specifically, in the resource selection method as described above, the subchannel indication information includes a first indication field for indicating a subchannel to be occupied by a PSSCH transmission resource corresponding to a PSCCH and a target transmission resource in a first resource block set; Here, the resource block set index corresponding to the first resource block set is a resource block set index reference value in all resource block sets occupied by the PSSCH transmission resources and the target transmission resources, and the target transmission resources are transmission resources reserved by the target PSCCH.

[0012] Preferably The resource selection method as described above, further comprising: based on at least one of a starting subchannel index of the target transmission resource in the first resource block set, the number of subchannels occupied by the PSSCH transmission resource and the target transmission resource in the first resource block set, and the total number of subchannels in the first resource block set; determining the first indication field.

[0013] Specifically, in the resource selection method as described above, the sub-channel indication information further includes a second indication field, which is a difference value between an index value of a second target sub-channel and an index value of a first target sub-channel; The index value of the first target subchannel is a first index reference value of the subchannel occupied by the target transmission resource and the PSSCH transmission resource in the first resource block set, and the index value of the second target subchannel is a second index reference value of the subchannel occupied by the target transmission resource and the PSSCH transmission resource in the second resource block set, where the second resource block set is a resource block set occupied by the PSSCH transmission resource and the target transmission resource other than the first resource block set.

[0014] Specifically, in the resource selection method as described above, the resource block set indication information is used to indicate resource block set information occupied by a PSSCH transmission resource corresponding to a PSCCH and a target transmission resource.

[0015] Preferably The resource selection method as described above, further comprising: based on at least one of the number of resource block sets occupied by the PSSCH transmission resource and the target transmission resource, an index of a starting resource block set occupied by the target transmission resource, and a total number of resource block sets in a resource pool; determining the resource block set indication information.

[0016] Another aspect of the present disclosure some An embodiment further provides a sidelink resource selection method operating in an unlicensed spectrum, applied to a second terminal, comprising: receiving a PSCCH transmitted from a first terminal; determining PSSCH transmission resources and target transmission resources corresponding to the PSCCH based on resources corresponding to the PSCCH and resource indication information, where the target transmission resources are transmission resources reserved by the PSCCH, the resource indication information is included in first-stage sidelink control information, the first-stage sidelink control information is carried by the PSCCH, and the resource indication information includes at least subchannel indication information and / or resource block set indication information.

[0017] Specifically, in the resource selection method as described above, when the resource indication information includes the sub-channel indication information, the sub-channel indication information includes a first indication field, or a first indication field and a second indication field; wherein the first indication field is used to determine at least one of the number of subchannels occupied by the PSSCH transmission resource and the target transmission resource in each first resource block set, and a starting subchannel occupied by the target transmission resource in the first resource block set; the second indication field is used to determine a difference between an index value of a second target subchannel and an index value of a first target subchannel, the index value of the first target subchannel being a first index reference value in a subchannel occupied by the PSSCH transmission resource and the target transmission resource in a first resource block set, and the index value of the second target subchannel being a second index reference value in a subchannel occupied by the PSSCH transmission resource and the target transmission resource in a second resource block set; a resource block set index corresponding to the first resource block set is a resource block set index reference value in all resource block sets occupied by the PSSCH transmission resource and the target transmission resource, respectively; The second resource block set is a resource block set other than the first resource block set that is occupied by the PSSCH transmission resources and the target transmission resources.

[0018] Specifically, in the resource selection method as described above, if the resource indication information includes the resource block set indication information, the resource block set indication information is used to determine at least one of the number of resource block sets occupied by the PSSCH transmission resource, the number of resource block sets occupied by the target transmission resource, and the starting resource block set index value occupied by the target transmission resource.

[0019] Specifically, in the resource selection method as described above, the step of determining a PSSCH transmission resource and a target transmission resource corresponding to the PSCCH based on the resource corresponding to the PSCCH and resource indication information includes: determining the PSSCH transmission resource based on the resource corresponding to the PSCCH and the resource indication information; and determining the target transmission resource based on the resource indication information.

[0020] Furthermore, in the resource selection method as described above, the step of determining the target transmission resource based on the resource indication information comprises: obtaining a starting resource block set occupied by the target transmission resource and the number of resource block sets occupied by the target transmission resource according to resource block set information in the resource indication information; determining a starting subchannel that the target transmission resource occupies in a first resource block set and the number of subchannels that the target transmission resource occupies in the first resource block set according to a first indication field included in the subchannel indication information; determining a subchannel that the target transmission resource occupies in the first resource block set based on the starting subchannel that the target transmission resource occupies in the first resource block set and the number of subchannels that the target transmission resource occupies in the first resource block set; determining a sub-channel that the target transmission resource occupies in a second resource block set based on a sub-channel that the target transmission resource occupies in the first resource block set; or determining a subchannel that the target transmission resource occupies in a second resource block set based on the subchannel that the target transmission resource occupies in a first resource block set and a second indication field included in the subchannel indication information;

[0021] Specifically, in the resource selection method as described above, the step of determining a sub-channel that the target transmission resource occupies in a second resource block set based on a sub-channel that the target transmission resource occupies in the first resource block set may include: the index of the subchannel occupied in the second resource block set is the same as the index of the subchannel occupied in the first resource block set; and The IRB index corresponding to the subchannel occupied in the second resource block set is the same as the IRB index corresponding to the subchannel occupied in the first resource block set.

[0022] Specifically, in the resource selection method as described above, the step of determining the subchannel that the target transmission resource occupies in the second resource block set based on the subchannel that the target transmission resource occupies in the first resource block set and the second indication field may include: The index value of the subchannel that the target transmission resource occupies in the second resource block set is the sum of the index value of the subchannel that the target transmission resource occupies in the first resource block set and a difference value indicated in the second indication field.

[0023] Specifically, in the resource selection method as described above, the step of determining the PSSCH transmission resource based on the resource corresponding to the PSCCH and the resource indication information includes: determining a resource block set occupied by the PSSCH transmission resource according to the resource corresponding to the PSCCH and the resource block set indication information; and determining a subchannel occupied by the PSSCH transmission resource based on the resource corresponding to the PSCCH and the subchannel indication information;

[0024] Preferably In the resource selection method as described above, the step of determining a resource block set to be occupied by the PSSCH transmission resource based on the resource corresponding to the PSCCH and the resource block set indication information comprises: determining a starting resource block set corresponding to the PSSCH transmission resource according to resources corresponding to the PSCCH; determining, based on the resource block set indication information, the number of resource block sets occupied by the PSSCH transmission resources; and determining a resource block set occupied by the PSSCH transmission resource based on a starting resource block set corresponding to the PSSCH transmission resource and the number of resource block sets occupied by the PSSCH transmission resource.

[0025] PreferablyIn the resource selection method as described above, the step of determining a subchannel to be occupied by the PSSCH transmission resource based on the resource corresponding to the PSCCH and the subchannel indication information comprises: determining a starting subchannel that the PSSCH transmission resource occupies in a first resource block set according to resources corresponding to the PSCCH; determining, based on a first indication field in the subchannel indication information, the number of subchannels that the PSSCH transmission resources occupy in the first resource block set; determining subchannels that the PSSCH transmission resources occupy in the first resource block set based on a starting subchannel that the PSSCH transmission resources occupy in the first resource block set and the number of subchannels that the PSSCH transmission resources occupy in the first resource block set; determining the sub-channels that the PSSCH transmission resources occupy in the second resource block set based on the sub-channels that the PSSCH transmission resources occupy in the first resource block set; or determining a subchannel that the PSSCH transmission resource occupies in the second resource block set based on the subchannel that the PSSCH transmission resource occupies in the first resource block set and a second indication field included in the subchannel indication information.

[0026] Specifically, in the resource selection method as described above, the step of determining the subchannels that the PSSCH transmission resources occupy in the second resource block set based on the subchannels that the PSSCH transmission resources occupy in the first resource block set comprises: The index of the subchannel that the PSSCH transmission resource occupies in the first resource block is the same as the index of the subchannel that the PSSCH transmission resource occupies in the second resource block; and The IRB index corresponding to the subchannel occupied by the PSSCH transmission resource in the first resource block is the same as the index of the IRB corresponding to the subchannel occupied by the PSSCH transmission resource in the second resource block.

[0027] Specifically, in the resource selection method as described above, the step of determining a subchannel to be occupied in a second resource block set by a PSSCH transmission resource corresponding to the PSCCH based on the subchannel to be occupied in the first resource block set by a PSSCH transmission resource corresponding to the PSCCH and the second indication field comprises: The index value of the subchannel that the PSSCH transmission resource occupies in the second resource block set is the sum of the index value of the subchannel that the PSSCH transmission resource occupies in the first resource block set and a difference value indicated in the second indication field.

[0028] of the present disclosure Some other An embodiment further provides a control device applied to a first terminal, a first processing module for performing resource selection to determine transmission resources for PSCCH and PSSCH transmissions; and a second processing module used to perform the PSCCH and PSSCH transmission, the PSCCH being used to carry first-stage sidelink control information, the first-stage sidelink control information including at least resource indication information, the resource indication information including at least subchannel indication information and / or resource block set indication information.

[0029] of the present disclosure Some other An embodiment further provides a control device adapted to a second terminal, a third processing module for receiving a PSCCH transmitted from the first terminal; and a fourth processing module for determining, based on resources corresponding to the PSCCH and resource indication information, PSSCH transmission resources and target transmission resources corresponding to the PSCCH, where the target transmission resources are transmission resources reserved by the PSCCH, the resource indication information is included in first-stage sidelink control information, the first-stage sidelink control information is carried by the PSCCH, and the resource indication information includes at least subchannel indication information and / or resource block set indication information.

[0030] Another aspect of the present disclosure some

[0013] An embodiment further provides a terminal device, the terminal device comprising: a processor; a memory; and a computer program stored in the memory and executable on the processor, the computer program being configured to, when executed by the processor, perform steps of a sidelink resource selection method operating in an unlicensed spectrum applied to a first terminal as described above, or to perform steps of a sidelink resource selection method operating in an unlicensed spectrum applied to a first terminal as described above. 2 The steps of a resource selection method for a sidelink operating in an unlicensed spectrum, applied to a terminal, are performed.

[0031] of the present disclosure Some other The embodiment further provides a computer-readable storage medium having a computer program stored thereon, the computer program being configured to, when executed by a processor, perform steps of a sidelink resource selection method operating in an unlicensed spectrum applied to a first terminal as described above, or to perform steps of a sidelink resource selection method operating in an unlicensed spectrum applied to a first terminal as described above. 2 The steps of a resource selection method for a sidelink operating in an unlicensed spectrum applied to a terminal are performed. [Effects of the Invention]

[0032] Compared with the related art, the sidelink resource selection method, apparatus, and terminal operating in an unlicensed spectrum provided in the embodiments of the present disclosure have at least the following beneficial effects:

[0033] In the present disclosure, resource indication in SL-U is realized by determining transmission resources corresponding to each transmission through resource selection, carrying first-stage sidelink control information including resource indication information on the PSCCH, and transmitting and receiving the resource indication information on the PSCCH, and indicating transmission resources by subchannel indication information and / or resource block set indication information in the resource indication information, thereby avoiding the signaling overhead in related technologies that can only be completed through multiple FRIVs. [Brief explanation of the drawings]

[0034] [Figure 1] 1 is a schematic flowchart of a sidelink resource selection method operating in an unlicensed spectrum applied to a first terminal of the present disclosure; [Figure 2] 1 is a schematic diagram illustrating transmission resources occupying a resource block set in a resource pool; [Figure 3] 1 is a schematic diagram in which transmission resources occupy subchannels in a set of consecutive resource blocks. [Figure 4] 2 is a schematic diagram showing transmission resources occupying subchannels in a set of consecutive resource blocks. [Figure 5] 3 is a schematic diagram in which transmission resources occupy subchannels in a set of consecutive resource blocks. [Figure 6] 1 is a schematic flowchart 1 of a sidelink resource selection method operating in an unlicensed spectrum applied to a second terminal of the present disclosure; [Figure 7] 2 is a schematic flowchart 2 of a sidelink resource selection method operating in an unlicensed spectrum applied to a second terminal of the present disclosure; [Figure 8] 3 is a schematic flowchart 3 of a sidelink resource selection method operating in an unlicensed spectrum applied to a second terminal of the present disclosure; [Figure 9] 4 is a schematic flowchart 4 of a sidelink resource selection method operating in an unlicensed spectrum applied to a second terminal of the present disclosure. [Figure 10] FIG. 2 is a schematic structural diagram of a control device applied to a first terminal of the present disclosure. [Figure 11] FIG. 2 is a schematic structural diagram of a control device applied to a second terminal of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0035] To clarify the technical problems, technical solutions, and advantages of the present disclosure, the present disclosure will be described in detail below with reference to the drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided merely to facilitate a thorough understanding of the embodiments of the present disclosure. 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 the present disclosure. In addition, for clarity and conciseness, descriptions of known functions and structures will be omitted.

[0036] References throughout the specification to "one embodiment" or " some "An embodiment" means that a particular feature, structure, or characteristic associated with an embodiment is included in at least one embodiment of the present disclosure. Thus, the phrases "in one embodiment" or "in one embodiment" appearing in various places throughout the specification. some "In an embodiment" does not necessarily refer to the same embodiment. Moreover, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

[0037] In various embodiments of the present disclosure, it should be understood that the order of the numbers of the steps described below does not indicate the order of execution, and the order of execution of each step should be determined based on its function and inherent logic, and does not limit the implementation steps of the embodiments of the present disclosure.

[0038] In this specification, the term "and / or" merely describes the relationship between related objects, and indicates that three types of relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the symbol " / " in this specification generally indicates that the related objects before and after it are in an "or" relationship.

[0039] In the examples provided in the present disclosure, it should be understood that "B corresponding to A" means that B is related to A, and B can be determined based on A. However, it should also be understood that determining B based on A does not only mean determining B based on A, but also means that B can be determined based on A and / or other information.

[0040] Referring to FIG. 1, some An embodiment provides a sidelink resource selection method operating in an unlicensed spectrum applied to a first terminal, and includes steps S101 and S102.

[0041] In step S101, resource selection is performed to determine transmission resources for PSCCH and PSSCH transmission, in which the first terminal performs resource selection in a resource selection window to determine transmission resources corresponding to each PSCCH and PSSCH transmission in one transmission block, thereby facilitating PSCCH and PSSCH transmission based on the corresponding transmission resources, where each PSCCH and PSSCH transmission in a transmission block includes an initial transmission and at least one retransmission.

[0042] In step S102, the PSCCH and PSSCH transmission is performed, where the PSCCH is used to carry first-stage sidelink control information, and the first-stage sidelink control information includes at least resource indication information, and the resource indication information includes at least subchannel indication information and / or resource block set indication information. In this step, the PSCCH and PSSCH transmission is performed according to the transmission resources obtained in the previous step, specifically, transmitted one by one.

[0043] In one PSCCH and PSSCH transmission, the PSCCH carries first-stage sidelink control information, and the first-stage sidelink control information includes at least transmission resources for indicating the current PSSCH, or transmission resources of the current PSSCH and transmission resources of the subsequent PSCCH and PSSCH reserved by the current PSCCH. some In an embodiment, when four transmission resources are obtained and one configured PSCCH reserves up to three transmission resources, the PSCCH corresponding to the transmission can indicate the transmission resources corresponding to the current PSSCH and the transmission resources corresponding to the first retransmission and the second retransmission. By carrying this resource indication information in the PSCCH, the second terminal for receiving can determine the transmission resources required for the corresponding transmission, thereby achieving complete reception of the PSCCH and the PSSCH.

[0044] Specifically, the resource indication information includes resource block set indication information for indicating the resource block set occupied by the transmission resource and / or subchannel indication information for indicating the subchannel occupied by the target transmission resource, so that the second terminal can accurately determine the resource block set and / or subchannel occupied by the required transmission resource.

[0045] To summarize the above, in this embodiment, the first terminal performs resource selection to determine transmission resources corresponding to each transmission, and carries first-stage sidelink control information including resource indication information on the PSCCH. The first terminal then transmits the resource indication information to the second terminal via the PSCCH, thereby realizing resource indication in SL-U. Furthermore, by indicating transmission resources using subchannel indication information and / or resource block set indication information in the resource indication information, the signaling overhead in the related art, which can only be completed through multiple FRIVs, is avoided.

[0046] Specifically, in the resource selection method as above, the transmission resources occupy one or more sets of contiguous resource blocks.

[0047] some In an embodiment, the transmission resources corresponding to one PSCCH and PSSCH transmission can occupy one resource block set, thereby reducing the probability that PSCCH and PSSCH transmission cannot be performed due to channel access failure. some In this embodiment, a transmission resource may occupy multiple resource block sets, but the multiple resource block sets must be contiguous, which allows all resource block sets to be quickly determined by determining the starting resource block set, thereby reducing overhead when specifying resources. In this case, the number of resource block sets occupied by each transmission resource may be the same. For example, as shown in Figure 2, a resource pool includes three resource block sets: RB set #0, RB set #1, and RB set #2. Here, the transmission resources corresponding to the initial transmission and the first retransmission occupy the contiguous RB set #0 and RB set #1, and the transmission resources corresponding to the second retransmission and the third retransmission occupy the contiguous RB set #1 and RB set #2.

[0048] Note that in this specification, the statement "a transmission resource occupies a resource block set" does not mean that the transmission resource occupies all subchannels in the resource block set, but rather that at least some of the subchannels occupied by the transmission resource are located in the resource block set.

[0049] Preferably, in the resource selection method as above, the transmission resources corresponding to the different PSCCH and PSSCH transmissions of the same transport block occupy the same number of resource block sets.

[0050] some In an embodiment, when performing resource selection, the number of resource block sets occupied by the transmission resources corresponding to each transmission of the same transmission block may be the same to facilitate collective indication, thereby further reducing the overhead of resource indication. Here, it is only emphasized that the number of RB sets occupied by each transmission is the same, but the indices of the RB sets corresponding to each transmission may be different. In particular, in the same transmission block, all RB sets occupied by the transmission resources corresponding to the PSCCH and PSSCH transmissions are contiguous, and the number of RB sets occupied by the transmission resources corresponding to the PSCCH and PSSCH transmissions is the same. For example, five RB sets are allocated in a resource pool, and the initial transmission occupies the first and second RB sets, the first retransmission occupies the second and third RB sets, and the second retransmission occupies the fourth and fifth RB sets.

[0051] Preferably In the resource selection method as above, when the transmission resource occupies multiple consecutive resource block sets, the transmission resource further satisfies at least one of the following:

[0052] The indices of the sub-channels occupied by the transmission resources in different resource block sets are consecutive, i.e., the indices of the sub-channels occupied by the transmission resources in consecutive resource block sets are consecutive. some In this embodiment, the transmission resource for one transmission occupies two consecutive resource block sets, and each resource block set has five sub-channels (the index values ​​of the sub-channels in the first resource block set are 0 to 4, and the index values ​​of the sub-channels in the second resource block set are 0 to 4). set For example, the transmission resources transmitted once occupy a total of four subchannels, which are subchannels 3 and 4 in the first resource block set, and subchannels 5 and 6 in the second resource block set. In another example, the transmission resources transmitted once occupy a total of four subchannels, which are subchannels 4 in the first resource block set, and subchannels 5, 6, and 7 in the second resource block set.

[0053] Note that consecutive subchannel indices are not equivalent to consecutive subchannel index values; for example, in this embodiment, subchannel 0 and subchannel 1 are consecutive, and subchannel 9 and subchannel 0 may also be consecutive.

[0054] In different resource block sets, the indices of the subchannels occupied by the transmission resources are consecutive, i.e., the transmission resources occupy subchannels with consecutive indices in each resource block set, but the subchannel indices between adjacent resource block sets may not be consecutive, and the indices of the occupied subchannels in each resource block set may also be different.

[0055] As shown in FIG. 3, in a specific implementation, the transmission resources occupy two resource block sets, RB set #0 and RB set #1, and the transmission resources corresponding to the initial transmission occupy consecutive subchannels 0 and 1 in RB set #0, and consecutive subchannels 0 and 1 in RB set #1.

[0056] As shown in Figure 4, in a specific implementation, the transmission resources occupy two resource block sets, RB set #0 and RB set #1, and the transmission resources corresponding to the initial transmission occupy consecutive subchannels 0 and 1 in RB set #0, and consecutive subchannels 4 and 0 in RB set #1. In addition, consecutive subchannel indices are not equivalent to consecutive subchannel index values. For example, in this embodiment, subchannels 0 and 1 may be consecutive, and subchannels 4 and 0 may also be consecutive.

[0057] In different resource block sets, the transmission resources occupy the same number of subchannels, i.e., the transmission resources occupy the same number of subchannels in different resource block sets, but the indices of the subchannels occupied in each resource block set may be the same or different, as shown in the transmission resources corresponding to the initial transmission in Figures 3 and 4, and detailed description will be omitted here.

[0058] The number of subchannels occupied by the transmission resources in at least one of the resource block sets is different from the number of subchannels occupied by the transmission resources in the other resource block sets, i.e., the number of subchannels occupied by the transmission resources in the resource block sets may be different.

[0059] someIn implementation, the transmission resources occupy two resource block sets, RB set #0 and RB set #1, and the current transmission resources corresponding to the initial transmission occupy subchannels corresponding to two subchannel indexes (e.g., subchannel 0 and subchannel 1) in RB set #0 and occupy a subchannel corresponding to one subchannel index (e.g., subchannel 0) in RB set #1.

[0060] Another some In implementation, the transmission resources occupy three resource block sets: RB set#0, RB set#1, and RB set#2, and the current transmission resource corresponding to the initial transmission occupies subchannels corresponding to two subchannel indexes (e.g., subchannel 0 and subchannel 1) in RB set#0, occupies a subchannel corresponding to one subchannel index (e.g., subchannel 0) in RB set#1, occupies a subchannel corresponding to one subchannel index (e.g., subchannel 0) in RB set#2, or occupies a subchannel corresponding to two subchannel indexes (e.g., subchannel 0 and subchannel 1) in RB set#2, or occupies a subchannel corresponding to three subchannel indexes (e.g., subchannel 0, subchannel 1, and subchannel 2) in RB set#2.

[0061] When the transmission resources include multiple consecutive resource block sets, it includes the following: all transmission resources corresponding to each transmission in the same transmission block occupy multiple consecutive resource block sets, and the number of resource block sets occupied by the transmission resources corresponding to each transmission is the same; or all transmission resources corresponding to each transmission in the same transmission block occupy multiple consecutive resource block sets, and the number of resource block sets occupied by the transmission resources corresponding to at least two transmissions is different.

[0062] PreferablyIn the resource selection method as described above, if the numbers of subchannels occupied by the transmission resources in different resource block sets are the same and the indices of the occupied subchannels are consecutive, the transmission resources further satisfy at least one of the following:

[0063] In different resource block sets, the subchannel indices occupied by the transmission resources are the same. As shown in FIG. 3, in a specific implementation, the transmission resources occupy two resource block sets, RB set #0 and RB set #1, and the current transmission resource corresponding to the initial transmission occupies subchannels corresponding to two subchannel indices (e.g., subchannel 0 and subchannel 1) in RB set #0 and also occupies subchannels corresponding to two subchannel indices (e.g., subchannel 0 and subchannel 1) in RB set #1.

[0064] In different resource block sets, the IRB indexes corresponding to the subchannels occupied by the transmission resources are the same. As shown in Figure 3, in a specific implementation, the transmission resources occupy two resource block sets, RB set #0 and RB set #1, and the current transmission resource corresponding to the initial transmission occupies subchannels corresponding to two subchannel indexes (e.g., subchannel 0 and subchannel 1) in RB set #0 and RB set #1, and occupies subchannels corresponding to two subchannel indexes (e.g., subchannel 0 and subchannel 1) in RB set #1, and subchannel 0 in RB set #0 and RB set #1 both correspond to the same IRB index, and the subchannels in RB set #0 and RB set #1 1 All correspond to the same IRB index.

[0065] As shown in FIG. 4, in a specific implementation, the transmission resources occupy two resource block sets, RB set #0 and RB set #1, and the current transmission resources corresponding to the initial transmission occupy subchannels corresponding to two subchannel indices in RB set #0 (e.g., subchannel 0 and subchannel 1), and occupy subchannels corresponding to two subchannel indices in RB set #1 (e.g., subchannel 4 and subchannel 0), and subchannel 0 in RB set #0 and subchannel 4 in RB set #1 correspond to the same IRB index, and subchannel 1 in RB set #0 and subchannel 0 in RB set #1 correspond to the same IRB index.

[0066] Specifically, in the resource selection method as described above, the subchannel indication information includes a first indication field for indicating a subchannel to be occupied by a PSSCH transmission resource corresponding to a PSCCH and a target transmission resource in a first resource block set; Here, the resource block set index corresponding to the first resource block set is a resource block set index reference value within all resource block sets occupied by the PSSCH transmission resources and the target transmission resources, and the target transmission resources are transmission resources reserved by the PSCCH.

[0067] someIn an embodiment, the resource indication information includes subchannel indication information, and the subchannel indication information includes a first indication field, which can indicate the subchannels occupied by the PSSCH transmission resources corresponding to the PSCCH and the target transmission resources in the first resource block set. In addition, based on the above-mentioned correspondence relationship between the subchannels in multiple consecutive resource block sets (e.g., the indices of the subchannels occupied by the transmission resources in different resource block sets are consecutive and the number of subchannels occupied by the transmission resources in different resource block sets is the same, or the indices of the subchannels occupied by the transmission resources in different resource block sets are consecutive and the number of subchannels occupied by the transmission resources in different resource block sets is the same), the second terminal can quickly and accurately determine the subchannels occupied by the PSSCH transmission resources and the target transmission resources in all resource block sets.

[0068] In addition, the PSCCH in this embodiment refers to the PSCCH carrying the first-stage sidelink control information including the resource indication information, and the target transmission resource refers to the transmission resource reserved for transmission or reception after the current transmission, for example, the target transmission resource is the reserved resource for the next PSCCH and PSSCH transmission. some In an embodiment, if the currently performed transmission is an initial transmission, the PSSCH transmission resource is the PSSCH transmission resource corresponding to the initial transmission, and the target transmission resource is the PSCCH and PSSCH transmission resource corresponding to the retransmission.

[0069] It should be noted that the resource block set index corresponding to the first resource block set described in this specification is a resource block set index reference value in all resource block sets occupied by the PSSCH transmission resources and the target transmission resources, and the resource block set index reference value is the maximum or minimum value among the resource block set index values ​​corresponding to all resource block sets occupied by the PSSCH transmission resources and the target transmission resources.

[0070] The first resource block set is a reference RB set corresponding to each of the PSSCH and the target resource. That is, there is one reference RB set for each transmission. For example, if an initial transmission occupies RB set #1 and RB set #2 and a retransmission occupies RB set #3 and RB set #4, the reference RB set for the initial transmission is RB set #1 and the reference RB set for the retransmission is RB set #3.

[0071] Preferably The resource selection method as described above, further comprising: based on at least one of a starting subchannel index of the target transmission resource in the first resource block set, the number of subchannels occupied by the PSSCH transmission resource and the target transmission resource in the first resource block set, and the total number of subchannels in the first resource block set; determining the first indication field.

[0072] In this embodiment, the expression format of the first indication field is a numerical format, which can be obtained based on a preset algorithm and resources determined during resource selection. someIn the embodiment, taking the FRIV method as an example, the required parameters are the starting subchannel index of the target transmission resource in the first resource block set, the number of subchannels occupied by the PSSCH transmission resource and the target transmission resource in the first resource block set, and the total number of subchannels in the first resource block set. The number of transmission resources indicated based on specific needs can be calculated by calling a corresponding algorithm, for example:

[0073] If the subchannel indication information can indicate at most two transmission resources, the first indication field is expressed as follows:

number

number

[0074] L subCH represents the number of subchannels occupied by the transmission resources in one resource block set.

[0075] some 3 or 4, assume that an initial transmission reserves PSSCH transmission resources corresponding to the initial transmission and target transmission resources corresponding to the first and second retransmissions, and the first resource block set is RB set #0. Then, a first indication field, i.e., FRIV, is determined based on information about the subchannels occupied by the above transmissions in RB set #0, where the subchannel information includes: the starting subchannel occupied by the first retransmission is "subchannel 2" and the number of occupied subchannels is 2; the starting subchannel occupied by the second retransmission is "subchannel 3" and the number of occupied subchannels is 2; and the total number of subchannels in the first resource block set is 5. Furthermore, the subchannel indication information can indicate a maximum of three transmission resources, so the first indication field FRIV = 2 + 3 * (5 + 1 - 2) + (5 + 1 - 1) * (5 + 1 - 1) = 39.

[0076] In the same manner, the second terminal can obtain the index value of the starting subchannel that the target transmission resource occupies in the first resource block set and the number of subchannels that it occupies based on the first indication field and the total number of subchannels in the first resource block set.

[0077] Alternatively, the number of target transmission resources may be two, in which case the first resource block set includes a first resource block set corresponding to the first target transmission resource and a first resource block set corresponding to the second target transmission resource.

[0078] Specifically, in the resource selection method as described above, the sub-channel indication information further includes a second indication field, which is a difference value between an index value of a second target sub-channel and an index value of a first target sub-channel; The index value of the first target subchannel is a first index reference value of the subchannel occupied by the target transmission resource and the PSSCH transmission resource in the first resource block set, and the index value of the second target subchannel is a second index reference value of the subchannel occupied by the target transmission resource and the PSSCH transmission resource in the second resource block set, where the second resource block set is a resource block set occupied by the PSSCH transmission resource and the target transmission resource other than the first resource block set.

[0079] some In an embodiment, the resource indication information includes subchannel indication information, and in addition to the above-mentioned first indication field, the subchannel indication information also includes a second indication field, which can indicate the index value relationship between subchannels in different resource block sets, so that the subchannels in the second resource block set can be determined based on the first indication field, where the second resource block set is a resource block set occupied by the PSSCH transmission resources and the target transmission resources other than the first resource block set.

[0080] some In an embodiment, the second indication field is a difference value between the index value of the second target subchannel and the index value of the first target subchannel.

[0081] The index value of the first target subchannel is the first index reference value of the subchannel occupied by the target transmission resource and the PSSCH transmission resource in the first resource block set, and the index value of the second target subchannel is the second index reference value of the subchannel occupied by the target transmission resource and the PSSCH transmission resource in the second resource block set, and the second resource block set is a resource block set occupied by the PSSCH transmission resource and the target transmission resource other than the first resource block set.

[0082] In addition, the first index reference value is a maximum or minimum value among the subchannel index values ​​of all subchannels occupied by the target transmission resource and the PSSCH transmission resource in the first resource block set; The second index reference value is the first index reference value for the target transmission resource and the PSSCH transmission resource. 2 It is the maximum or minimum value among the subchannel index values ​​of all the subchannels occupied in the resource block set.

[0083] some In an embodiment, the first index reference value and the second index reference value are respectively a maximum value or a minimum value.

[0084] Referring to Figure 5, some In this embodiment, the initial transmission and each retransmission occupy the same resource block set, but there is no correspondence between the subchannel indexes or IRB indexes occupied by each transmission in RB set #0 and RB set #1, i.e., they may be the same or different. The first resource block set corresponding to the first indication field is determined to be RB set #0, i.e., the value of the first indication field, i.e., FRIV, is determined based on the information about the subchannels occupied in RB set #0. Assuming that the initial transmission reserves the first retransmission and the second retransmission, the FRIV in the 1st-stage SCI of the initial transmission is 2+3*(5+1-2)+(5+1-1)*(5+1-1)=39.

[0085] In addition, the 1st-stage SCI for the initial transmission must also carry the frequency domain offset values ​​of the second target subchannel (in this embodiment, the first subchannel in RB set #1) that each transmission occupies in another resource block set and the first target subchannel (in this embodiment, the first subchannel in RB set #1) that each transmission occupies in the first resource block set, i.e., the second indication field in the subchannel indication information. As shown in Figure 5, the offset value obtained by calculation for the initial transmission is 1, the offset value for the first retransmission is 0, and the offset value for the second retransmission is -1.

[0086] Specifically, in the resource selection method as described above, the resource block set indication information is used to indicate resource block set information occupied by a PSSCH transmission resource corresponding to a PSCCH and a target transmission resource.

[0087] some In an embodiment, the resource indication information includes resource block set indication information, which can indicate information about the resource block set occupied by the PSSCH transmission resource corresponding to the PSCCH and the target transmission resource, thereby facilitating the second terminal to accurately determine the resource block set occupied by the PSSCH transmission resource and the target transmission resource.

[0088] Preferably The resource selection method as described above, further comprising: based on at least one of the number of resource block sets occupied by the PSSCH transmission resource and the target transmission resource, an index of a starting resource block set occupied by the target transmission resource, and a total number of resource block sets in a resource pool; determining the resource block set indication information.

[0089] In this embodiment, the resource block set indication information is expressed in a numerical format, which can be obtained based on a preset algorithm and resources determined during resource selection. some In the embodiment, taking the RIV method as an example, the required parameters are the number of resource block sets occupied by the PSSCH transmission resource and the target transmission resource, the index of the starting resource block set occupied by the target transmission resource, and the total number of resource block sets in the resource pool. Furthermore, the number of transmission resources indicated based on specific needs can be calculated by calling a corresponding algorithm, for example:

[0090] If the resource block set indication information can indicate at most two transmission resources, the resource block set indication information is expressed as follows:

number

number

[0091] In a specific implementation, as shown in FIG. 2, the resource block set indication information indicates at most two transmission resources, i.e., a PSSCH transmission resource (corresponding to the initial transmission) and one target transmission resource (corresponding to the first retransmission). If the number of resource block sets in the resource pool is 3, the number of resource block sets occupied by each transmission resource is 2, and the index of the starting resource block set occupied by the second transmission resource (corresponding to the first retransmission) is 0, then the resource block set indication information indicates RIV=0+(3+1-1)=3.

[0092] If the resource block set indication information indicates up to three transmission resources, i.e., a PSSCH transmission resource (corresponding to the first transmission) and two target transmission resources (corresponding to the first and second retransmissions, respectively), the number of resource block sets in the resource pool is three, the number of resource block sets occupied by each transmission resource is two, the index of the starting resource block set occupied by the second transmission resource (corresponding to the first retransmission) is 0, and the index of the starting resource block set occupied by the third transmission resource (corresponding to the second retransmission) is 1, then the resource block set indication information has an RIV of 1+2×(3+1-2)+(3+1-1). 2 =14.

[0093] Referring to FIG. 6, another embodiment of the present disclosure some The embodiment further provides a sidelink resource selection method operating in an unlicensed spectrum applied to a second terminal, including steps S601 and S602.

[0094] In step S601, the PSCCH transmitted from the first terminal is received. In this step, the second terminal determines the PSSCH transmission resource and the target transmission resource corresponding to the PSCCH based on the information corresponding to the PSCCH, and then receives the PSCCH transmitted from the first terminal to receive the PSSCH transmission resource and the target transmission resource.

[0095] In step S602, determine PSSCH transmission resources and target transmission resources corresponding to the PSCCH based on resources and resource indication information corresponding to the PSCCH, where the target transmission resources are transmission resources reserved by the PSCCH, and the resource indication information is included in first-stage sidelink control information carried by the PSCCH, and the resource indication information includes at least subchannel indication information and / or resource block set indication information. In this step, corresponding information can be determined by analyzing the received PSCCH, for example, based on resources corresponding to the PSCCH and resource indication information included in the first-stage sidelink control information carried by the PSCCH, where the resource indication information includes at least subchannel indication information and / or resource block set indication information, so that the second terminal can determine PSSCH transmission resources and target transmission resources corresponding to the PSCCH based on the resources and resource indication information corresponding to the PSCCH, for receiving and / or transmitting on the PSSCH transmission resources and target transmission resources.

[0096] To summarize the above, in this embodiment, the second terminal receives the PSCCH transmitted from the first terminal, and determines the PSSCH transmission resources and target transmission resources corresponding to the PSCCH based on the resources corresponding to the PSCCH and the carried resource indication information, thereby realizing resource indication in SL-U, and indicating the transmission resources using subchannel indication information and / or resource block set indication information in the resource indication information, thereby avoiding the signaling overhead in the related art that can only be completed through multiple FRIVs. Note that the PSCCH received by the second terminal refers to the PSCCH in one transmission.

[0097] Specifically, in the resource selection method as described above, when the resource indication information includes the sub-channel indication information, the sub-channel indication information includes a first indication field, or a first indication field and a second indication field; wherein the first indication field is used to determine at least one of the number of subchannels that the PSSCH transmission resource and the target transmission resource occupy in each first resource block set, and the starting subchannel that the target transmission resource occupies in the first resource block set; the second indication field is used to determine a difference between an index value of a second target subchannel and an index value of a first target subchannel, the index value of the first target subchannel being a first index reference value in a subchannel occupied by the PSSCH transmission resource and the target transmission resource in a first resource block set, and the index value of the second target subchannel being a second index reference value in a subchannel occupied by the PSSCH transmission resource and the target transmission resource in a second resource block set; a resource block set index corresponding to the first resource block set is a resource block set index reference value in all resource block sets occupied by the PSSCH transmission resource and the target transmission resource, respectively; The second resource block set is a resource block set other than the first resource block set that is occupied by the PSSCH transmission resources and the target transmission resources.

[0098] someIn an embodiment, the resource indication information includes subchannel indication information. If the subchannel indication information includes a first indication field, the first indication field can indicate the subchannels occupied by the PSSCH transmission resource corresponding to the PSCCH and the target transmission resource in the first resource block set, specifically, the number of subchannels occupied by the PSSCH transmission resource and the target transmission resource in the first resource block set, and the starting subchannel occupied by the target transmission resource in the first resource block set.

[0099] In addition, the PSCCH in this embodiment refers to the received PSCCH, and the target transmission resource refers to the transmission resource reserved for transmission and reception after the current reception, for example, the target transmission resource is the reserved resource for the next PSCCH and PSSCH transmission.

[0100] It should be noted that the resource block set index corresponding to the first resource block set described in this embodiment is a resource block set index reference value in all resource block sets occupied by the PSSCH transmission resources and the target transmission resources, and this resource block set index reference value is the maximum or minimum value among the resource block set index values ​​corresponding to all resource block sets occupied by the PSSCH transmission resources and the target transmission resources.

[0101] Another some In an embodiment, the subchannel indication information further includes a second indication field, which can indicate the index value relationship between subchannels in different resource block sets, so that the subchannels in the second resource block set can be determined based on the first indication field, where the second resource block set is a resource block set occupied by the PSSCH transmission resources and the target transmission resources other than the first resource block set.

[0102] someIn an embodiment, the second indication field is a difference value between the index value of the second target subchannel and the index value of the first target subchannel.

[0103] The index value of the first target subchannel is the first index reference value of the subchannel occupied by the target transmission resource and the PSSCH transmission resource in the first resource block set, and the index value of the second target subchannel is the second index reference value of the subchannel occupied by the target transmission resource and the PSSCH transmission resource in the second resource block set, and the second resource block set is a resource block set occupied by the PSSCH transmission resource and the target transmission resource other than the first resource block set.

[0104] In addition, the first index reference value is a maximum or minimum value among the subchannel index values ​​of all subchannels occupied by the target transmission resource and the PSSCH transmission resource in the first resource block set; The second index reference value is the first index reference value for the target transmission resource and the PSSCH transmission resource. 2 It is the maximum or minimum value among the subchannel index values ​​of all the subchannels occupied in the resource block set.

[0105] some In an embodiment, the first index reference value and the second index reference value are respectively a maximum value or a minimum value.

[0106] Specifically, in the resource selection method as described above, if the resource indication information includes the resource block set indication information, the resource block set indication information is used to determine at least one of the number of resource block sets occupied by the PSSCH transmission resource, the number of resource block sets occupied by the target transmission resource, and the starting resource block set index value occupied by the target transmission resource.

[0107] Another some In an embodiment, the resource indication information further includes the resource block set indication information, which can indicate the PSSCH transmission resources corresponding to the PSCCH and the resource block set information occupied by the target transmission resources, thereby facilitating the second terminal to accurately determine the resource block sets occupied by the PSSCH transmission resources and the target transmission resources.

[0108] some In an embodiment, the resource block set indication information can determine at least one of the number of resource block sets occupied by the PSSCH transmission resource, the number of resource block sets occupied by the target transmission resource, and the index value of the starting resource block set occupied by the target transmission resource.

[0109] Specifically, in the resource selection method as described above, the step of determining PSSCH transmission resources and target transmission resources corresponding to the PSCCH based on resources corresponding to the PSCCH and resource indication information includes at least one of the following:

[0110] The PSSCH transmission resource is determined based on the resource corresponding to the PSCCH and the resource indication information. Here, since the PSCCH corresponding to the PSSCH transmission resource is notified to the second terminal in the form of transmission, when the PSSCH transmission resource is determined, it needs to be determined based on the resource corresponding to the PSCCH and the resource indication information.

[0111] The target transmission resource is determined based on the resource indication information, and since the indication information related to the target transmission resource is included in the resource indication information, the target transmission resource can be determined based on the resource indication information.

[0112] Referring to Figure 7, PreferablyIn the resource selection method as described above, the step of determining the target transmission resource based on the resource indication information includes at least one of steps S701 to S705.

[0113] In step S701, obtain the starting resource block set occupied by the target transmission resource and the number of resource block sets occupied by the target transmission resource according to the resource block set information in the resource indication information. some In an embodiment, the starting resource block set occupied by the target transmission resource and the number of resource block sets occupied by the target transmission resource may be determined based on the resource block set indication information.

[0114] In step S702, a starting subchannel that the target transmission resource occupies in a first resource block set and the number of subchannels that the target transmission resource occupies in the first resource block set are determined based on a first indication field included in the subchannel indication information. some In an embodiment, the starting subchannel that the target transmission resource occupies in the first resource block set and the number of subchannels that the target transmission resource occupies in the first resource block set can be determined based on the first indication field.

[0115] In step S703, the subchannels that the target transmission resource occupies in the first resource block set are determined based on the starting subchannel that the target transmission resource occupies in the first resource block set and the number of subchannels that the target transmission resource occupies in the first resource block set. In a specific implementation, the subchannels that the target transmission resource occupies in the first resource block set are determined using the following formula: Nindex=mod(Nstart+i-1,Ntotal) where Nindex represents the subchannel index that the i-th subchannel of the target transmission resource occupies in the first resource block set; Nstart represents the starting subchannel index that the starting subchannel of the target transmission resource occupies in the first resource block set; Ntotal represents the total number of subchannels in the first resource block set.

[0116] some In this embodiment, it is assumed that the first target transmission resource determined based on the first indication field, i.e., FRIV, has a starting subchannel in the first resource block set of subchannel 4, the number of occupied subchannels is 2, the second target transmission resource determined has a starting subchannel in the first resource block set of subchannel 1, the number of occupied subchannels is 2, and the resource pool includes a total of five subchannels (subchannel 0 to subchannel 4). Then, the subchannels occupied by the first target transmission resource in the first resource block set are subchannel 4 and subchannel 0 (mod(4+2-1,5)=0), respectively, and the subchannels occupied by the second target transmission resource in the first resource block set are subchannel 1 and subchannel 2, respectively.

[0117] In step S704, the subchannels occupied by the target transmission resources in the second resource block set are determined based on the subchannels occupied by the target transmission resources in the first resource block set. That is, in multiple consecutive resource block sets, the subchannels occupied by the target transmission resources determined from each resource block set have a certain correspondence relationship. Therefore, after knowing the subchannels occupied by the target transmission resources in the first resource block set, the subchannels occupied by the target transmission resources in the second resource block set can be determined based on this correspondence relationship.

[0118] someIn an embodiment, the correspondence relationship is such that the index of an occupied subchannel in the second resource block set is the same as the index of an occupied subchannel in the first resource block set, and / or the IRB index corresponding to an occupied subchannel in the second resource block set is the same as the IRB index corresponding to an occupied subchannel in the first resource block set. In step S705, the subchannels occupied by the target transmission resources in the second resource block set are determined based on the subchannels occupied by the target transmission resources in the first resource block set and the second indication field included in the subchannel indication information. If the subchannel indication information includes the second indication field, the subchannels occupied by the target transmission resources in the second resource block set can be determined based on the subchannels occupied by the target transmission resources in the first resource block set and the second indication field.

[0119] some In this embodiment, the second indication field indicates the difference between the index value of the second target subchannel and the index value of the first target subchannel, i.e., the second indication field indicates the difference between the index values ​​of corresponding subchannels in different resource block sets. The index values ​​of each subchannel occupied by the target transmission resource in the second resource block set are obtained by summing the index values ​​of each subchannel occupied by the target transmission resource in the first resource block set and the difference value. Therefore, the subchannels occupied by the target transmission resource can be determined based on the index values ​​of each subchannel occupied by the target transmission resource in the second resource block set.

[0120] Specifically, in the resource selection method as described above, the step of determining the PSSCH transmission resource based on the resource corresponding to the PSCCH and the resource indication information includes: determining a resource block set occupied by the PSSCH transmission resource based on the resource corresponding to the PSCCH and the resource block set information; and determining a subchannel occupied by the PSSCH transmission resource based on the resource corresponding to the PSCCH and the subchannel indication information;

[0121] In this embodiment, the resource indication information includes resource block set information for indicating resource block information and / or subchannel indication information for indicating subchannel information. Therefore, when determining PSSCH transmission resources, the second terminal needs to target-wise determine the resource block sets occupied by the PSSCH transmission resources and / or the subchannels occupied by the PSSCH transmission resources based on the information specifically included in the resource indication information.

[0122] Referring to Figure 8, Preferably In the resource selection method as above, the step of determining the resource block set occupied by the PSSCH transmission resource based on the resource corresponding to the PSCCH and the resource block set indication information includes steps S801 to S803.

[0123] In step S801, determine a starting resource block set corresponding to the PSSCH transmission resource according to the resource corresponding to the PSCCH; some In an embodiment, the starting resource block or starting resource block set within the resource corresponding to the PSCCH is the starting resource block set corresponding to the PSSCH transmission resource.

[0124] In step S802, determine the number of resource block sets occupied by the PSSCH transmission resources according to the resource block set indication information; someIn an embodiment, the number of resource block sets occupied by the PSSCH transmission resource is equal to the number of resource block sets occupied by the target transmission resource.

[0125] In step S803, the resource block sets occupied by the PSSCH transmission resources are determined based on the starting resource block set corresponding to the PSSCH transmission resources and the number of resource block sets occupied by the PSSCH transmission resources. After determining the starting resource block set corresponding to the PSSCH transmission resources and the number of resource block sets occupied by the PSSCH transmission resources, the starting resource block set and a predetermined number of resource block sets consecutive to the starting resource block set are determined to be the resource block sets occupied by the PSSCH transmission resources. some In an embodiment, if the starting resource block set corresponding to the PSSCH transmission resource is RB set#1 and the number of resource block sets occupied by the PSSCH transmission resource is two, the resource block sets occupied by the PSSCH transmission resource are RB set#1 and RB set#2, respectively.

[0126] Referring to Figure 9, Preferably In the resource selection method as described above, the step of determining a sub-channel to be occupied by the PSSCH transmission resource based on the resource corresponding to the PSCCH and the sub-channel indication information includes at least one of steps S901 to S905.

[0127] In step S901, determine a starting subchannel that the PSSCH transmission resource occupies in a first resource block set according to resources corresponding to the PSCCH; some In an embodiment, the subchannel in which the resource corresponding to the PSCCH is located or the starting subchannel within the resource corresponding to the PSCCH is the starting subchannel that the PSSCH transmission resource occupies in the first resource block set.

[0128] In step S902, determine the number of subchannels that the PSSCH transmission resources occupy in the first resource block set according to a first indication field in the subchannel indication information.

[0129] In step S903, determine the subchannels that the PSSCH transmission resources occupy in the first resource block set according to the starting subchannels that the PSSCH transmission resources occupy in the first resource block set and the number of subchannels that the PSSCH transmission resources occupy in the first resource block set. In a specific implementation, determine the subchannels that the target transmission resources occupy in the first resource block set according to the following formula: Nindex=mod(Nstart+i-1,Ntotal) where Nindex represents the subchannel index that the i-th subchannel of the PSSCH transmission resource occupies in the first resource block set; Nstart represents the starting subchannel index that the starting subchannel of the PSSCH transmission resource occupies in the first resource block set; Ntotal represents the total number of subchannels in the first resource block set.

[0130] some In this embodiment, it is assumed that the starting subchannel in the first resource block set of the PSSCH transmission resource determined based on the first indication field, i.e., FRIV, is subchannel 4, the number of occupied subchannels is 2, and the resource pool includes a total of five subchannels (subchannel 0 to subchannel 4). Then, the subchannels occupied by the PSSCH transmission resource in the first resource block set are subchannel 4 and subchannel 0 (mod(4+2-1,5)=0), respectively.

[0131] In step S904, determine the subchannels that the PSSCH transmission resources occupy in the second resource block set based on the subchannels that the PSSCH transmission resources occupy in the first resource block set. some In an embodiment, in multiple consecutive resource block sets, the subchannels occupied by the PSSCH transmission resources determined from each resource block set have a certain correspondence relationship. Therefore, based on knowing the subchannels occupied by the PSSCH transmission resources in the first resource block set, it is possible to determine the subchannels occupied by the PSSCH transmission resources in the second resource block set based on the correspondence relationship.

[0132] some In an embodiment, the correspondence relationship is that the index of an occupied subchannel in the second resource block set is the same as the index of an occupied subchannel in the first resource block set, and / or the IRB index corresponding to an occupied subchannel in the second resource block set is the same as the IRB index corresponding to an occupied subchannel in the first resource block set. In step S905, the subchannel that the PSSCH transmission resource occupies in the second resource block set is determined based on the subchannel that the PSSCH transmission resource occupies in the first resource block set and the second indication field included in the subchannel indication information. some In an embodiment, if the subchannel indication information includes a second indication field, the subchannel that the PSSCH transmission resource occupies in the second resource block set can be determined according to the subchannel that the PSSCH transmission resource occupies in the first resource block set and the second indication field.

[0133] someIn this embodiment, since the second indication field indicates a difference between the index value of the second target subchannel and the index value of the first target subchannel, i.e., the second indication field indicates a difference between the index values ​​of corresponding subchannels in different resource block sets, the index value of each subchannel occupied by the PSSCH transmission resource in the second resource block set can be obtained by summing the index value of each subchannel occupied by the PSSCH transmission resource in the first resource block set and the difference value, so that the subchannel occupied by the PSSCH transmission resource can be determined based on the index value of each subchannel occupied by the PSSCH transmission resource in the second resource block set.

[0134] Referring to FIG. 10, Some other An embodiment further provides a control device adapted to a first terminal, a first processing module 1001 for performing resource selection to determine transmission resources for PSCCH and PSSCH transmission; and a second processing module 1002 used to perform the PSCCH and PSSCH transmission, the PSCCH being used to carry first-stage sidelink control information, the first-stage sidelink control information including at least resource indication information, the resource indication information including at least subchannel indication information and / or resource block set indication information.

[0135] Specifically, in the apparatus as above, the transmission resources occupy one or more sets of contiguous resource blocks.

[0136] Preferably, in the apparatus as above, the transmission resources corresponding to each different PSCCH and PSSCH transmission of the same transport block occupy the same number of resource block sets.

[0137] PreferablyIn the above apparatus, when the transmission resource occupies a plurality of consecutive resource block sets, the transmission resource further comprises: the indexes of the subchannels occupied by the transmission resources in the different resource block sets are consecutive; In the different resource block sets, the subchannels occupied by the transmission resources have consecutive indices; the number of subchannels occupied by the transmission resources in different resource block sets is the same; and At least one of the following conditions is satisfied: the number of sub-channels occupied by the transmission resources in at least one of the resource block sets is different from the number of sub-channels occupied by the transmission resources in the other resource block sets.

[0138] Preferably In the above-mentioned device, when the number of subchannels occupied by the transmission resources in different resource block sets is the same and the indexes of the occupied subchannels are consecutive, the transmission resources may further be: In different resource block sets, the subchannels occupied by the transmission resources have the same index; and In the different resource block sets, at least one of the IRB indices corresponding to the subchannels occupied by the transmission resources is the same.

[0139] Specifically, in the above-mentioned device, the subchannel indication information includes a first indication field for indicating a subchannel to be occupied by a PSSCH transmission resource corresponding to a PSCCH and a target transmission resource in a first resource block set; Here, the resource block set index corresponding to the first resource block set is a resource block set index reference value in all resource block sets occupied by the PSSCH transmission resources and the target transmission resources, and the target transmission resources are transmission resources reserved by the target PSCCH.

[0140] Preferably , the apparatus as described above, further comprising: based on at least one of a starting subchannel index of the target transmission resource in the first resource block set, the number of subchannels occupied by the PSSCH transmission resource and the target transmission resource in the first resource block set, and the total number of subchannels in the first resource block set; and a fifth processing module for determining the first indication field.

[0141] Specifically, in the above-mentioned device, the sub-channel indication information further includes a second indication field, which is a difference value between an index value of a second target sub-channel and an index value of a first target sub-channel; The index value of the first target subchannel is a first index reference value of the subchannel occupied by the target transmission resource and the PSSCH transmission resource in the first resource block set, and the index value of the second target subchannel is a second index reference value of the subchannel occupied by the target transmission resource and the PSSCH transmission resource in the second resource block set, where the second resource block set is a resource block set occupied by the PSSCH transmission resource and the target transmission resource other than the first resource block set.

[0142] Specifically, in the above-mentioned device, the resource block set indication information is used to indicate resource block set information occupied by a PSSCH transmission resource corresponding to a PSCCH and a target transmission resource.

[0143] Preferably , the apparatus as described above, further comprising: based on at least one of the number of resource block sets occupied by the PSSCH transmission resource and the target transmission resource, an index of a starting resource block set occupied by the target transmission resource, and a total number of resource block sets in a resource pool; and a sixth processing module for determining the resource block set indication information.

[0144] The control device applied to the first terminal of the present disclosure is a device corresponding to an embodiment of the sidelink resource selection method operating in an unlicensed spectrum applied to the first terminal described above, and all implementation means in the above method embodiments are applicable to the device embodiments, and similar technical effects can be achieved.

[0145] Referring to FIG. 11, Some other An embodiment further provides a control device applied to a second terminal, a third processing module 1101 for receiving a PSCCH transmitted from a first terminal; and a fourth processing module 1102, which is used to determine PSSCH transmission resources and target transmission resources corresponding to the PSCCH based on resources corresponding to the PSCCH and resource indication information, where the target transmission resources are transmission resources reserved by the PSCCH, the resource indication information is included in first-stage sidelink control information, the first-stage sidelink control information is carried by the PSCCH, and the resource indication information includes at least subchannel indication information and / or resource block set indication information.

[0146] Specifically, in the above-mentioned device, when the resource indication information includes the sub-channel indication information, the sub-channel indication information includes a first indication field, or a first indication field and a second indication field; wherein the first indication field is used to determine at least one of the number of subchannels occupied by the PSSCH transmission resource and the target transmission resource in each first resource block set, and a starting subchannel occupied by the target transmission resource in the first resource block set; the second indication field is used to determine a difference between an index value of a second target subchannel and an index value of a first target subchannel, the index value of the first target subchannel being a first index reference value in a subchannel occupied by the PSSCH transmission resource and the target transmission resource in a first resource block set, and the index value of the second target subchannel being a second index reference value in a subchannel occupied by the PSSCH transmission resource and the target transmission resource in a second resource block set; a resource block set index corresponding to the first resource block set is a resource block set index reference value in all resource block sets occupied by the PSSCH transmission resource and the target transmission resource, respectively; The second resource block set is a resource block set other than the first resource block set that is occupied by the PSSCH transmission resources and the target transmission resources.

[0147] Specifically, in the above-mentioned device, if the resource indication information includes the resource block set indication information, the resource block set indication information is used to determine at least one of the number of resource block sets occupied by the PSSCH transmission resource, the number of resource block sets occupied by the target transmission resource, and the starting resource block set index value occupied by the target transmission resource.

[0148] Specifically, in the above-described apparatus, the fourth processing module comprises: a first sub-processing module for determining the PSSCH transmission resource based on the resource corresponding to the PSCCH and the resource indication information; and and at least one of the second sub-processing modules for determining the target transmission resource based on the resource indication information.

[0149] Preferably In the above-mentioned device, the second sub-processing module is a first processing unit for obtaining a starting resource block set occupied by the target transmission resource and a number of resource block sets occupied by the target transmission resource according to resource block set information in the resource indication information; a second processing unit for determining, according to a first indication field included in the subchannel indication information, a starting subchannel that the target transmission resource occupies in a first resource block set and the number of subchannels that the target transmission resource occupies in the first resource block set; a third processing unit for determining a subchannel that the target transmission resource occupies in the first resource block set based on the starting subchannel that the target transmission resource occupies in the first resource block set and the number of subchannels that the target transmission resource occupies in the first resource block set; a fourth processing unit for determining a sub-channel that the target transmission resource occupies in a second resource block set based on a sub-channel that the target transmission resource occupies in the first resource block set; or and at least one fifth processing unit for determining a sub-channel that the target transmission resource occupies in a second resource block set based on the sub-channel that the target transmission resource occupies in a first resource block set and a second indication field included in the sub-channel indication information.

[0150] Specifically, in the above-described apparatus, the fourth processing unit comprises: the index of the subchannel occupied in the second resource block set is the same as the index of the subchannel occupied in the first resource block set; and The IRB index corresponding to the subchannel occupied in the second resource block set is the same as the IRB index corresponding to the subchannel occupied in the first resource block set.

[0151] Specifically, in the above-described apparatus, the fifth processing unit comprises: The index value of the subchannel that the target transmission resource occupies in the second resource block set is the sum of the index value of the subchannel that the target transmission resource occupies in the first resource block set and a difference value indicated in the second indication field.

[0152] Specifically, in the above-described device, the first sub-processing module comprises: a sixth processing unit for determining a resource block set occupied by the PSSCH transmission resource according to the resource corresponding to the PSCCH and the resource block set indication information; and and at least one of a seventh processing unit for determining a sub-channel occupied by the PSSCH transmission resource according to the resource corresponding to the PSCCH and the sub-channel indication information.

[0153] Preferably In the above-mentioned apparatus, the sixth processing unit is a first sub-processing unit for determining, based on resources corresponding to the PSCCH, a starting resource block set corresponding to the PSSCH transmission resources; a second sub-processing unit for determining, based on the resource block set indication information, the number of resource block sets occupied by the PSSCH transmission resources; and a third sub-processing unit for determining a resource block set occupied by the PSSCH transmission resource based on a starting resource block set corresponding to the PSSCH transmission resource and the number of resource block sets occupied by the PSSCH transmission resource;

[0154] Preferably In the above-mentioned apparatus, the seventh processing unit a fourth sub-processing unit for determining, based on resources corresponding to the PSCCH, a starting sub-channel that the PSSCH transmission resource occupies in a first resource block set; a fifth sub-processing unit for determining, based on a first indication field in the sub-channel indication information, the number of sub-channels that the PSSCH transmission resources occupy in the first resource block set; a sixth sub-processing unit for determining sub-channels that the PSSCH transmission resources occupy in the first resource block set based on a starting sub-channel that the PSSCH transmission resources occupy in the first resource block set and the number of sub-channels that the PSSCH transmission resources occupy in the first resource block set; a seventh sub-processing unit for determining, based on the sub-channels that the PSSCH transmission resources occupy in the first resource block set, the sub-channels that the PSSCH transmission resources occupy in the second resource block set; or and at least one eighth sub-processing unit for determining a sub-channel that the PSSCH transmission resource occupies in the second resource block set based on a sub-channel that the PSSCH transmission resource occupies in the first resource block set and a second indication field included in the sub-channel indication information.

[0155] Specifically, in the above-mentioned device, the seventh sub-processing unit The index of the subchannel that the PSSCH transmission resource occupies in the first resource block is the same as the index of the subchannel that the PSSCH transmission resource occupies in the second resource block; and The IRB index corresponding to the subchannel that the PSSCH transmission resource occupies in the first resource block is the same as the index of the IRB corresponding to the subchannel that the PSSCH transmission resource occupies in the second resource block.

[0156] Specifically, in the above-mentioned device, the eighth sub-processing unit The index value of the subchannel that the PSSCH transmission resource occupies in the second resource block set is the sum of the index value of the subchannel that the PSSCH transmission resource occupies in the first resource block set and a difference value indicated in the second indication field.

[0157] The control device applied to the second terminal of the present disclosure is a device corresponding to an embodiment of the sidelink resource selection method operating in an unlicensed spectrum applied to the above-mentioned second terminal, and all implementation means in the above-mentioned method embodiments are applicable to the embodiment of the device, and similar technical effects can be achieved.

[0158] Another aspect of the present disclosure some An embodiment provides a terminal device, the terminal device comprising: a processor; a memory; and a computer program stored in the memory and executable on the processor, the computer program being configured to, when executed by the processor, perform steps of a sidelink resource selection method operating in an unlicensed spectrum applied to a first terminal as described above, or to perform steps of a sidelink resource selection method operating in an unlicensed spectrum applied to a first terminal as described above. 2 The steps of a resource selection method for a sidelink operating in an unlicensed spectrum applied to a terminal are performed.

[0159] of the present disclosure Some otherAn embodiment provides a computer-readable storage medium having a computer program stored thereon, the computer program being configured to, when executed by a processor, perform steps of a sidelink resource selection method operating in an unlicensed spectrum applied to a first terminal as described above, or to perform steps of a sidelink resource selection method operating in an unlicensed spectrum applied to a first terminal as described above. 2 The steps of a resource selection method for a sidelink operating in an unlicensed spectrum applied to a terminal are performed.

[0160] Additionally, the present disclosure may refer to repeated numbers and / or letters in different examples. Such repetition is for the purposes of simplicity and clarity and does not in itself dictate a relationship between the various examples and / or configurations discussed.

[0161] Additionally, in this specification, relational terms such as first and second are used merely to distinguish one entity or operation from another, and do not require or imply the existence of any such actual relationship or ordering between those entities or operations. And, "comprises," "contains," or any other variation thereof, is intended to be non-exclusive inclusion.

[0162] The above are optional embodiments of the present disclosure, however, those skilled in the art may make some improvements and modifications without departing from the principles described in the present disclosure, and these improvements and modifications should also be considered as within the protection scope of the present disclosure.

Claims

1. 1. A sidelink resource selection method applied to a first terminal operating in an unlicensed spectrum, comprising: performing resource selection to determine transmission resources for Physical Sidelink Control Channel PSCCH and Physical Sidelink Shared Channel PSSCH transmissions; The step of transmitting the PSCCH and PSSCH, wherein the PSCCH is a first stage sidelink control information 1 st and wherein the first-stage sidelink control information is used to carry first-stage SCI, and the first-stage sidelink control information includes at least resource indication information, the resource indication information including at least subchannel indication information and / or resource block set (RB set) indication information.

2. The resource selection method of claim 1 , wherein the transmission resources occupy one or more sets of contiguous resource blocks.

3. The resource selection method according to claim 1 , wherein the transmission resources corresponding to the different PSCCH and PSSCH transmissions of the same transport block TB occupy the same number of resource block sets.

4. If the transmission resource occupies multiple consecutive resource block sets, the transmission resource may further include: the indexes of the subchannels occupied by the transmission resources in the different resource block sets are consecutive; In the different resource block sets, the subchannels occupied by the transmission resources have consecutive indices; the number of subchannels occupied by the transmission resources in different resource block sets is the same; and 4. The resource selection method according to claim 2, wherein the number of sub-channels occupied by the transmission resources in at least one of the resource block sets is different from the number of sub-channels occupied by the transmission resources in the other resource block sets.

5. If the numbers of subchannels occupied by the transmission resources in different resource block sets are the same and the indices of the occupied subchannels are consecutive, the transmission resources may further include: In different resource block sets, the subchannels occupied by the transmission resources have the same index; and 5. The resource selection method according to claim 4, wherein in different resource block sets, the indices of interlaced resource blocks IRB corresponding to the subchannels occupied by the transmission resources are the same.

6. the subchannel indication information includes a first indication field for indicating a subchannel occupied by a PSSCH transmission resource corresponding to a PSCCH and a target transmission resource in a first resource block set; 2. The resource selection method of claim 1, wherein the resource block set index corresponding to the first resource block set is a resource block set index reference value in all resource block sets occupied by the PSSCH transmission resource and the target transmission resource, and the target transmission resource is a transmission resource reserved by the PSCCH.

7. The resource selection method further includes: based on at least one of a starting subchannel index of the target transmission resource in the first resource block set, the number of subchannels occupied by the PSSCH transmission resource and the target transmission resource in the first resource block set, and the total number of subchannels in the first resource block set; 7. The resource selection method of claim 6, further comprising the step of determining the first indication field.

8. the subchannel indication information further includes a second indication field that is a difference value between an index value of a second target subchannel and an index value of a first target subchannel; 8. The resource selection method according to claim 6, wherein the index value of the first target subchannel is a first index reference value of a subchannel occupied by the target transmission resource and the PSSCH transmission resource in the first resource block set, and the index value of the second target subchannel is a second index reference value of a subchannel occupied by the target transmission resource and the PSSCH transmission resource in a second resource block set, and the second resource block set is a resource block set occupied by the PSSCH transmission resource and the target transmission resource other than the first resource block set.

9. The resource selection method according to any one of claims 1 to 3, wherein the resource block set indication information is used to indicate resource block set information occupied by a PSSCH transmission resource corresponding to a PSCCH and a target transmission resource.

10. The resource selection method further includes: based on at least one of the number of resource block sets occupied by the PSSCH transmission resource and the target transmission resource, an index of a starting resource block set occupied by the target transmission resource, and a total number of resource block sets in a resource pool; The resource selection method according to claim 9, comprising determining the resource block set indication information.

11. 1. A sidelink resource selection method applied to a second terminal operating in an unlicensed spectrum, comprising: receiving a PSCCH transmitted from a first terminal; determining PSSCH transmission resources and target transmission resources corresponding to the PSCCH based on resources corresponding to the PSCCH and resource indication information, where the target transmission resources are transmission resources reserved by the PSCCH, the resource indication information is included in first-stage sidelink control information, the first-stage sidelink control information is carried by the PSCCH, and the resource indication information includes at least subchannel indication information and / or resource block set indication information.

12. When the resource indication information includes the sub-channel indication information, the sub-channel indication information includes a first indication field or a first indication field and a second indication field; wherein the first indication field is used to determine at least one of the number of subchannels occupied by the PSSCH transmission resource and the target transmission resource in each first resource block set, and a starting subchannel occupied by the target transmission resource in the first resource block set; the second indication field is used to determine a difference between an index value of a second target subchannel and an index value of a first target subchannel, the index value of the first target subchannel being a first index reference value in a subchannel occupied by the PSSCH transmission resource and the target transmission resource in a first resource block set, and the index value of the second target subchannel being a second index reference value in a subchannel occupied by the PSSCH transmission resource and the target transmission resource in a second resource block set; a resource block set index corresponding to the first resource block set is a resource block set index reference value in all resource block sets occupied by the PSSCH transmission resource and the target transmission resource; The resource selection method of claim 11 , wherein the second resource block set is a resource block set other than the first resource block set occupied by the PSSCH transmission resource and the target transmission resource.

13. 12. The resource selection method of claim 11, wherein, if the resource indication information includes the resource block set indication information, the resource block set indication information is used to determine at least one of the number of resource block sets occupied by the PSSCH transmission resource, the number of resource block sets occupied by the target transmission resource, and a starting resource block set index value occupied by the target transmission resource.

14. determining a PSSCH transmission resource and a target transmission resource corresponding to the PSCCH based on the resource corresponding to the PSCCH and resource indication information, determining the PSSCH transmission resource based on the resource corresponding to the PSCCH and the resource indication information; and The resource selection method according to claim 11, comprising at least one of the steps of: determining the target transmission resource based on the resource indication information.

15. determining the target transmission resource based on the resource indication information, obtaining a starting resource block set occupied by the target transmission resource and the number of resource block sets occupied by the target transmission resource according to resource block set information in the resource indication information; determining a starting subchannel that the target transmission resource occupies in a first resource block set and the number of subchannels that the target transmission resource occupies in the first resource block set according to a first indication field included in the subchannel indication information; determining a subchannel that the target transmission resource occupies in the first resource block set based on the starting subchannel that the target transmission resource occupies in the first resource block set and the number of subchannels that the target transmission resource occupies in the first resource block set; determining a sub-channel that the target transmission resource occupies in a second resource block set based on a sub-channel that the target transmission resource occupies in the first resource block set; or 15. The resource selection method according to claim 14, further comprising: determining a sub-channel that the target transmission resource occupies in a second resource block set based on a sub-channel that the target transmission resource occupies in a first resource block set and a second indication field included in the sub-channel indication information.

16. determining a sub-channel that the target transmission resource occupies in a second resource block set based on a sub-channel that the target transmission resource occupies in the first resource block set, the index of the subchannel occupied in the second resource block set is the same as the index of the subchannel occupied in the first resource block set; and 16. The resource selection method of claim 15, comprising at least one of: IRB indices corresponding to subchannels occupied in the second resource block set being the same as IRB indices corresponding to subchannels occupied in the first resource block set.

17. determining a sub-channel that the target transmission resource occupies in the second resource block set based on the sub-channel that the target transmission resource occupies in the first resource block set and the second indication field, 16. The resource selection method of claim 15, wherein the index value of the subchannel that the target transmission resource occupies in the second resource block set is a sum of the index value of the subchannel that the target transmission resource occupies in the first resource block set and a difference value indicated in the second indication field.

18. determining the PSSCH transmission resource based on the resource corresponding to the PSCCH and the resource indication information, determining a resource block set occupied by the PSSCH transmission resource based on the resource corresponding to the PSCCH and the resource block set information; and The resource selection method of claim 14, comprising at least one of the steps of: determining a sub-channel to be occupied by the PSSCH transmission resource based on the resource corresponding to the PSCCH and the sub-channel indication information.

19. determining a resource block set occupied by the PSSCH transmission resource based on the resource corresponding to the PSCCH and the resource block set information, determining a starting resource block set corresponding to the PSSCH transmission resources based on resources corresponding to the PSCCH; determining the number of resource block sets occupied by the PSSCH transmission resources based on the resource block set information; and 20. The resource selection method of claim 18, comprising at least one of the steps of: determining a resource block set occupied by the PSSCH transmission resource based on a starting resource block set corresponding to the PSSCH transmission resource and a number of resource block sets occupied by the PSSCH transmission resource.

20. The step of determining a sub-channel occupied by the PSSCH transmission resource based on the resource corresponding to the PSCCH and the sub-channel indication information includes: determining a starting subchannel that the PSSCH transmission resource occupies in a first resource block set based on resources corresponding to the PSCCH; determining, based on a first indication field in the subchannel indication information, the number of subchannels that the PSSCH transmission resources occupy in the first resource block set; determining subchannels that the PSSCH transmission resources occupy in the first resource block set based on a starting subchannel that the PSSCH transmission resources occupy in the first resource block set and the number of subchannels that the PSSCH transmission resources occupy in the first resource block set; determining the sub-channels that the PSSCH transmission resources occupy in the second resource block set based on the sub-channels that the PSSCH transmission resources occupy in the first resource block set; or 20. The resource selection method of claim 18, further comprising: determining a subchannel that the PSSCH transmission resource occupies in the second resource block set based on a subchannel that the PSSCH transmission resource occupies in a first resource block set and a second indication field included in the subchannel indication information.

21. determining a subchannel that the PSSCH transmission resource occupies in the second resource block set based on a subchannel that the PSSCH transmission resource occupies in the first resource block set, The index of the subchannel that the PSSCH transmission resource occupies in the first resource block is the same as the index of the subchannel that the PSSCH transmission resource occupies in the second resource block; and 21. The resource selection method of claim 20, wherein an IRB index corresponding to a subchannel that the PSSCH transmission resource occupies in the first resource block is the same as an index of an IRB corresponding to a subchannel that the PSSCH transmission resource occupies in the second resource block.

22. determining a subchannel that a PSSCH transmission resource corresponding to the PSCCH occupies in the second resource block set based on the subchannel that a PSSCH transmission resource corresponding to the PSCCH occupies in the first resource block set and the second indication field, 21. The resource selection method of claim 20, wherein the index value of the subchannel that the PSSCH transmission resource occupies in the second resource block set is a sum of the index value of the subchannel that the PSSCH transmission resource occupies in the first resource block set and a difference value indicated in the second indication field.

23. A control device applied to a first terminal, a first processing module for performing resource selection to determine transmission resources for PSCCH and PSSCH transmissions; and a second processing module used to perform the PSCCH and PSSCH transmissions, the PSCCH being used to carry first-stage sidelink control information, the first-stage sidelink control information including at least resource indication information, the resource indication information including at least subchannel indication information and / or resource block set indication information.

24. A control device applied to a second terminal, a third processing module for receiving a PSCCH transmitted from the first terminal; and a fourth processing module used to determine PSSCH transmission resources and target transmission resources corresponding to the PSCCH based on resources corresponding to the PSCCH and resource indication information, where the target transmission resources are transmission resources reserved by the PSCCH, the resource indication information is included in first-stage sidelink control information, the first-stage sidelink control information is carried by the PSCCH, and the resource indication information includes at least subchannel indication information and / or resource block set indication information.

25. 23. A terminal device comprising: a processor; a memory; and a computer program stored in the memory and executable on the processor, the computer program, when executed by the processor, performing steps of a method for selecting resources for a sidelink operating in an unlicensed spectrum applied to a first terminal according to any one of claims 1 to 10; or performing steps of a method for selecting resources for a sidelink operating in an unlicensed spectrum applied to a first terminal according to any one of claims 11 to 22.

26. 23. A computer-readable storage medium having stored thereon a computer program, the computer program being, when executed by a processor, to perform the steps of a method for selecting resources for a sidelink operating in an unlicensed spectrum applied to a first terminal according to any one of claims 1 to 10, or to perform the steps of a method for selecting resources for a sidelink operating in an unlicensed spectrum applied to a first terminal according to any one of claims 11 to 22.

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