Side Link Resource Determination Method, Device, and Storage Medium

Abstract

A sidelink resource determination method applied to a first node, comprising: determining (S710) a set of physical layer candidate time-frequency resources for a sidelink transmission opportunity from a sidelink resource pool based on system configuration information; and determining (S720) a physical layer time-frequency resource for a sidelink transmission opportunity from the set of physical layer candidate time-frequency resources, wherein the set of physical layer candidate time-frequency resources does not include a first resource that occupies L subchannels having consecutive indexes in the frequency domain, or includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels that do not have consecutive indexes, or does not include a first resource that occupies L consecutive subchannels in the frequency domain and includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels that do not have consecutive indexes, and L is an integer greater than or equal to 1. A sidelink resource determination method, device, and storage medium.

Description

Technical Field

[0001] The present application relates to the field of wireless communication, and relates to a sidelink resource determination method, device, and storage medium.

Background Art

[0002] When a sidelink unlicensed (SL-U) device operates in an unlicensed spectrum, it is first necessary to determine a sidelink (SL) resource pool in the unlicensed spectrum. Here, the SL-U resource pool includes N resource block sets (RB sets) and N - 1 guard bands, where N is an integer greater than or equal to 1. Between each two adjacent RB sets, one guard band including a plurality of consecutive resource blocks (RBs) can be configured, pre-configured, or pre-defined by the system.

[0003] When selecting subchannels in the frequency domain range of the SL resource pool, although some subchannels may include resources in the guard band, in the 3rd Generation Partnership Project (3GPP) protocol, the user equipment (UE) successfully performs Listen Before Talk (LBT) on two RB sets adjacent to the guard band at the same time, and the usage conditions of the resources in the guard band for transmitting simultaneously in these two RB sets are defined. However, when the SL-U device selects transmission resources from the SL resource pool, the selected resources may not meet the usage conditions of the resources in the guard band, so the transmission of the selected transmission resources cannot be completed. Also, regarding the fact that in conventional New Radio (NR) SL, generally only the resources of continuous subchannels are considered when selecting data transmission resources, there is no problem in the resource pool for transmission based on continuous RBs, but in the resource pool for transmission based on interleaved RBs, candidate resources consisting of some non-fully continuous subchannels may also be used for data transmission. Therefore, if only the conventional resource selection method is considered, some opportunities to select available resources will be lost, which may reduce the efficiency of sidelink communication. Summary of the Invention Problems to be Solved by the Invention

[0004] Embodiments of the present application provide a sidelink resource determination method, device, and storage medium.

[0005] An embodiment of the present application is a sidelink resource determination method applied to a first node, comprising: Based on system configuration information, determining a set of candidate physical layer time-frequency resources for sidelink transmission opportunities from a sidelink resource pool, and determining physical layer time-frequency resources for sidelink transmission opportunities from the set of candidate physical layer time-frequency resources, wherein the set of candidate physical layer time-frequency resources does not include a first resource that occupies L subchannels with consecutive indices in the frequency domain, or includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels without consecutive indices, or does not include a first resource that occupies L consecutive subchannels in the frequency domain and includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels without consecutive indices, and L is an integer greater than or equal to 1, to provide a sidelink resource determination method.

[0006] Examples of this application A memory configured to store a program, and a processor configured to execute the program, wherein when the program is executed, based on system configuration information, a set of candidate physical layer time-frequency resources for sidelink transmission opportunities is determined from a sidelink resource pool, and physical layer time-frequency resources for sidelink transmission opportunities are determined from the set of candidate physical layer time-frequency resources, wherein the set of candidate physical layer time-frequency resources does not include a first resource that occupies L subchannels with consecutive indices in the frequency domain, or includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels without consecutive indices, or does not include a first resource that occupies L consecutive subchannels in the frequency domain and includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels without consecutive indices, and L is an integer greater than or equal to 1, to provide a sidelink resource determination device.

[0007] Examples of this application When executed, a non-volatile memory medium including a stored program that executes the sidelink resource determination method according to any one of claims 1 to 10 is provided.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

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Figure 4

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Figure 11

Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present application will be described with reference to the drawings.

[0010] In 5th Generation New Radio in Unlicensed Spectrum (5G NR-U) for 5G, M consecutive interleaved resource blocks (RBs) are defined per carrier, with each interleaved RB evenly distributed, different interleaves distributed in a comb-like pattern in the frequency domain, numbered from 0 to M - 1. Further, N consecutive RB sets are defined in the frequency domain, numbered from 0 to N - 1. As shown in Figure 1, which is a schematic diagram of the carrier frequency domain distribution of NR-U. When indicating data resources, NR-U adopts a two-stage indication method of X + Y, where X represents the interleaving used for the Physical Uplink Shared Channel (PUSCH) resources, and Y represents the consecutive RB sets used for PUSCH resources. In this way, the UE can determine the frequency domain resource position of the data within the Bandwidth Part (BWP) based on the indication information. The minimum indication unit in the frequency domain is all of the physical RB resources in one RB set within one interleaving.

[0011] The SL device is one that communicates based on the resources in the SL resource pool without the need for data transfer by the base station. Figure 2 is a schematic diagram of the communication scenario of the SL device. In Figure 2, between UE1 and UE2, there is no need for scheduling and data transfer by the base station, and SL communication is performed using the resources in the SL resource pool.

[0012] The minimum unit of data scheduling in the SL resource pool is a subchannel, which may also be referred to as a subchannel. In 3GPP Release (Rel)-16 / Rel-17, depending on the system configuration, or pre-configuration information, or pre-definition, the SL resource pool consists of W consecutive subchannels in the frequency domain. Generally, a piece of data occupies several consecutive subchannels, and one subchannel contains several consecutive resource blocks (RBs) determined based on the system configuration or pre-configuration information. Figure 3 is a schematic diagram of the resource configuration of the SL resource pool. As shown in Figure 3, the bandwidth part (BWP) of the SL resource pool contains a total of W consecutive subchannels from subchannel0 to subchannelW-1.

[0013] After determining the SL resource pool, when performing resource indication, the resource position of the SL data can be determined by only indicating the start position of the subchannels occupied by the data in the frequency domain and the number of subchannels used. At least one subchannel is used for data transmission. After determining the frequency domain position of its own data, the UE indicates the frequency domain information of one or more physical sidelink shared channel (PSSCH) resources reserved in the sidelink control information (SCI) according to the frequency domain resource indication value (FRIV) indication information in the SCI.

[0014] In 3GPP Rel-18, for SL-U, while supporting the transmission of consecutive RBs like R-16 / R-17, it also supports data transmission based on interleaved RBs like NR-U. Also, the SL resource pool contains an integer number of RB sets, which also means that the subchannel, which is the minimum resource allocation granularity in the SL resource pool, may be consecutive RBs. Figures 4 and 5 are schematic diagrams of two different SL resource pools. In Figures 4 and 5, RB set0 and RB set1 are two adjacent RB sets, and the RBs between RB set0 and RB set1 belong to the guard band. The RBs in the guard band may be defined as resources in the subchannel of the SL resource pool, or may only be used for rate matching. Figures 4 and 5 show that the RBs in the guard band are defined as the subchannel of the SL resource pool. Here, there is a difference between Figure 4 and Figure 5 in that in Figure 4, the subchannels in the SL resource pool are arranged consecutively, while in Figure 5, the start positions of the subchannels in each RB set are all aligned with the start position of the RB set.

[0015] The subchannel may also consist of interleaved RBs. Figure 6 is a schematic diagram of an SL resource pool based on interleaving, and Sc in Figure 6 is used to represent the subchannel.

[0016] The physical resources required for the transmission opportunity of the SL-U device are generally L subchannels in the frequency domain. However, there is a guard band between the RB sets in the frequency domain of the SL resource pool, and there are restrictions on the use of the guard band. Also, for transmission by interleaving, there may be restrictions on the coincidence of interleaving in different RB sets in NR. Therefore, the L subchannels with consecutive indexes corresponding to one transmission opportunity of the SL-U device may not be available. Thus, the SL-U device needs to consider these factors when selecting time-frequency resources for the transmission opportunity.

[0017] FIG. 7 is a flowchart of a side link resource determination method according to an embodiment of the present application. As shown in FIG. 7, the side link resource determination method according to the embodiment of the present application includes the following steps.

[0018] In step 710, based on the system configuration information, a physical layer candidate time-frequency resource set for the side link transmission opportunity is determined from the side link resource pool.

[0019] The physical layer candidate time-frequency resource set does not include a first resource that occupies L subchannels with continuous indexes in the frequency domain, or includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels without continuous indexes, or does not include a first resource that occupies L consecutive subchannels in the frequency domain and includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels without continuous indexes, where L is an integer greater than or equal to 1.

[0020] In the SL-U system, devices operating in the unlicensed band also operate based on the SL resource pool. The SL resource pool includes N subchannels with consecutive numbers. A subchannel is usually the smallest scheduling and indication unit for SL data transmission. In SL-U transmission, two forms of transmission based on consecutive RBs and transmission based on interleaved RBs are supported. When configured to perform transmission based on consecutive RBs, the RB resources included in the subchannel are also consecutive RBs in the SL resource pool. When the SL resource pool is configured to perform interleaved-based transmission, the subchannel also consists of interleaved RBs. In any form, finally, when resource selection is performed for one UE, it can be uniformly abstracted into the mode of FIG. 3.

[0021] When selecting resources from the SL resource pool, the UE determines L subchannels as the physical transmission resources of the sidelink shared channel from the SL resource pool according to upper layer or physical layer instructions. Here, in mode 1, the UE directly determines L subchannels from the SL resource pool according to the instructions of the base station. In mode 2, the UE needs to perform sensing in the resource selection window or perform random resource selection to select the physical transmission resources of one appropriate sidelink shared channel including L subchannels.

[0022] When the UE performs resource selection based on sensing, it determines candidate resources R x,y in the resource selection window, reports the set of candidate resources that meet the requirements to the upper layer, and then the upper layer needs to determine the final PSSCH time-frequency resources. Determine the mechanism of the candidate resource set according to the SL mode2 UE, that is, regard L consecutive subchannels starting from the subchannel that is the starting point as the candidate resources of one single slot. If this mechanism is continuously reused, in the SL resource pool, some candidate resources in the resource selection window cannot be used, and some additional candidate resources can be used but cannot be determined according to the conventional mechanism. In order to more effectively determine the candidate resources when the UE selects resources, it is necessary to consider the processing of unavailable candidate resources and the processing of additional candidate resources. When the UE performs resource selection based on random selection, regarding that its Media Access Control (MAC) layer performs random resource selection from the candidate resource set instructed by the physical layer to determine the final time-frequency resources, it is similarly necessary to consider the processing of unavailable candidate resources and the processing of additional candidate resources.

[0023] Therefore, this embodiment provides a sidelink resource determination method applicable to a first node which may be a network device that needs to perform uplink data transmission using sidelink resources in a UE or a network. First, based on system configuration information, a set of physical layer candidate time-frequency resources for sidelink transmission opportunities is determined from a sidelink resource pool. The set of physical layer candidate time-frequency resources is a set of physical layer selectable time-frequency resources for performing sidelink transmission at the first node. Each set of candidate time-frequency resources includes a plurality of consecutive RBs, or includes one or more interleaved RBs, or includes a plurality of subchannels that are used as a scheduling unit.

[0024] Determining the physical layer candidate time-frequency resources based on system configuration information includes determining the physical layer candidate time-frequency resources in a system configuration, or a pre-configuration, or a pre-defined manner. Here, the system configuration may be referred to as a configuration, which is usually from the network side or a base station, and is transmitted from the network side or the base station to the first node by means of signaling. The pre-configuration is usually a configuration provided by an upper layer of the first node itself or another upper layer entity such as another network entity, or the configuration information of the physical layer candidate time-frequency resources is pre-defined at the first node.

[0025] In the conventional SL resource pool, since it includes a plurality of consecutive RB sets and guard bands between adjacent RB sets, when the UE selects a transmission resource from the SL resource pool, it may select an RB within the guard band. However, in some cases, the RBs within the guard band cannot be used. To solve the above problems, in this embodiment, based on the system configuration information, in the sidelink resource pool (i.e., SL resource pool), first determine a set of physical layer candidate time-frequency resources for the sidelink transmission opportunity. This set of physical layer candidate time-frequency resources does not include a first resource, or includes a second resource, or does not include the first resource and includes the second resource. The first resource is a candidate resource that needs to be excluded from the sidelink resource pool, and the second resource is an additional candidate resource indicating that it can be used in sidelink transmission. Both the first resource and the second resource include L subchannels, where L is an integer greater than or equal to 1.

[0026] Determining a set of physical layer candidate time-frequency resources for the sidelink transmission opportunity from the sidelink resource pool can be divided into the following three cases.

[0027] 1) The set of physical layer candidate time-frequency resources does not include a first resource that occupies L subchannels with consecutive indices in the frequency domain. Each of the L subchannels with consecutive indices occupied in the frequency domain of the first resource includes an RB with a plurality of consecutive indices, or can include one or more interleaved RBs in one or more consecutive RB sets. For example, in the SL resource pool shown in Figure 3, the first resource includes subchannel1 and subchannel2, or includes subchannel2, subchannel3, and subchannel4. In this way, when selecting the physical layer time-frequency resources for the sidelink transmission opportunity, the first resource is not selected.

[0028] 2) The physical layer candidate time-frequency resource set includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels without consecutive indexes. In conventional SL resource selection, only subchannels that are consecutive in the frequency domain can be selected. In contrast, in the embodiments of the present application, it is possible to additionally indicate a second resource in which the indexes of the subchannels are not completely consecutive. The second resource is also a resource that occupies L subchannels in the frequency domain, and there is at least one pair of adjacent subchannels without consecutive indexes in the second resource. For example, in the SL resource pool shown in FIG. 3, according to the conventional resource selection method, only a plurality of subchannels with consecutive indexes, such as subchannel0, subchannel1, subchannel2, or subchannel1, subchannel2, subchannel3, can be selected. In contrast, in the embodiments of the present application, the second resource can consist of subchannel0, subchannel1, subchannel3, where the indexes of subchannel0 and subchannel1 are consecutive, and the indexes of subchannel1 and subchannel3 are not consecutive. In this way, when selecting the physical layer time-frequency resource for the sidelink transmission opportunity, the second resource can be selected.

[0029] 3) The physical layer candidate time-frequency resource set does not include the first resource that occupies L consecutive sub-channels in the frequency domain, and the physical layer candidate time-frequency resource set includes the second resource that occupies L sub-channels in the frequency domain and has at least one pair of adjacent sub-channels without consecutive indexes. Such a method corresponds to combining the above methods 1) and 2). First, the first resource is excluded from the candidate resources in the sidelink resource pool, or the initialized candidate resource set, or the candidate resource set that needs to be reported after the sensing of the MAC layer or the physical layer is completed, and then the second resource is added. Therefore, when selecting the physical layer time-frequency resource for the sidelink transmission opportunity, the selection range is larger, the first resource is not selected, while the second resource can be selected.

[0030] Next, the characteristics of the first resource will be described.

[0031] The first resource can have any one of the following characteristics a) to m).

[0032] a) The index of the first resource block RB in the first sub-channel among the L sub-channels with consecutive indexes is greater than or equal to the first RB index of the nth RB set and less than or equal to the index of the first RB in the n + 1th RB set.

[0033] FIG. 8 is a schematic diagram of a first resource in an embodiment of the present application. Taking a subchannel transmitted based on consecutive RBs as an example, as shown in FIG. 8, the first resource includes a total of L subchannels Sc m, Sc m+1, Sc m+2, ···, Sc m+L-1. The index of the first RB in the first subchannel of the first resource (i.e., Sc m) is greater than or equal to the index of the first RB in the nth RB set (RB set0 in the figure). And the index of the first RB in the first subchannel is less than or equal to the index of the first RB in the (n + 1)th RB set (RB set1 in the figure). Each RB set includes a plurality of RBs, and the indexes of each RB are arranged in order later. The indexes of the RBs in adjacent RB sets are also arranged in order later. In this way, the starting RB in the starting subchannel of the first resource is after the first position where the first RB in RB set0 is located in FIG. 8. That is, the index of the starting RB in the starting subchannel of the first resource may be greater than or equal to the index of the first RB in RB set0. And the starting RB in the starting subchannel of the first resource is before the starting RB in RB set1. That is, the index of the starting RB in the starting subchannel of the first resource may be less than or equal to the index of the first RB in RB set1. The range between the first position in the figure and the starting position of RB set1 is the range of the starting RB in the starting subchannel of the first resource. The L subchannels starting from the range of the starting RB of the first resource are the first resource. By setting the starting RB in the starting subchannel of the first resource, that is, the starting point of the first subchannel, it is possible to avoid selecting only the resources in the guard band and one RB set for the selected physical layer time-frequency resources.

[0034] b) The first RB in the first subchannel of the L subchannels having consecutive indexes is within the guard band.

[0035] This also limits the starting point of the first resource. If the first RB in the first subchannel of the first resource is within the guard band, it indicates that the starting point of the first resource is within the guard band. The first resource configured in this way can avoid the situation where only the resources in one RB set adjacent to the guard band are selected for the selected physical layer time-frequency resources.

[0036] c) The first subchannel among the L subchannels with consecutive indexes includes an RB within the guard band.

[0037] Depending on the system configuration and usage environment, in some transmission scenarios, if resources within the guard band are used in sidelink transmission, it may affect the transmission. Therefore, the first resource may be L consecutive subchannels where the first subchannel includes an RB within the guard band, that is, as long as the first subchannel includes an RB within the guard band, it belongs to the resources to be excluded.

[0038] d) The number of RBs within the guard band included in the first subchannel among the L subchannels with consecutive indexes exceeds a first threshold.

[0039] In this case, only when the number of RBs within the guard band included in the first subchannel exceeds the first threshold, it is determined that the L consecutive subchannels are the first resource and need to be excluded.

[0040] e) The ratio of the number of RBs within the guard band included in the first subchannel among the L subchannels with consecutive indexes to the subchannel size exceeds a second threshold.

[0041] The larger the number of RBs in the guard band used for sidelink transmission, the higher the probability and degree of data transmission interference. Therefore, only when the ratio of the number of RBs in the guard band included in the first subchannel to the total number of RBs included in the subchannel exceeds the second threshold, the continuous L subchannels may be determined to be the first resource and need to be excluded.

[0042] f) The frequency-domain RB resources in L subchannels with consecutive indexes include both the RBs in the RB set and the RBs in the guard band, and the number of RBs in the guard band exceeds the third threshold.

[0043] In this case, all the RBs in the consecutive L subchannels are judged. If the consecutive L subchannels include both the RBs in the RB set and the RBs in the guard band, and the number of RBs in the guard band exceeds the third threshold, it is determined that these consecutive L subchannels are the first resource and need to be excluded. Here, the third threshold regarding the number of RBs may be an absolute value, or a ratio or proportion.

[0044] g) At least one of the subchannels included in L subchannels with consecutive indexes includes the RBs in the guard band.

[0045] In this case, as long as any one of the consecutive L subchannels includes the RBs in the guard band, the first resource composed of these consecutive L subchannels belongs to the range to be excluded.

[0046] h) The index of the last RB in the last subchannel among L subchannels with consecutive indexes is greater than or equal to the index of the last RB in the nth RB set and less than or equal to the second RB index of the (n + 1)th RB set.

[0047] FIG. 8 shows the limitation of the start point of the first resource. However, in the embodiments of the present application, the end point of the first resource may also be limited. FIG. 9 is a schematic diagram of another first resource in the embodiments of the present application, taking a subchannel transmitted based on consecutive RBs as an example. As shown in FIG. 9, the first resource includes a total of L subchannels of Sc m, Sc m+1, Sc m+2, ···, Sc m+L-1. The index of the last RB in the last subchannel of the first resource (i.e., Sc m+L-1) is greater than or equal to the index of the last RB in the nth RB set (RB set0 in the figure). And the index of the last RB in the last subchannel is less than or equal to the second RB index of the (n + 1)th RB set (RB set1 in the figure). Each RB set includes a plurality of RBs, and the indexes of each RB are arranged in order backward, and the indexes of the RBs in adjacent RB sets are also arranged in order backward. In this way, the end RB in the end subchannel of the first resource is after the last RB in RB set0, that is, the index of the end RB in the end subchannel of the first resource is greater than or equal to the index of the last RB in RB set0. And the end RB in the end subchannel of the first resource is before the second position, which is the position where the second RB is located in RB set1 in FIG. 9, that is, the index of the end RB in the end subchannel of the first resource is less than or equal to the index of the second RB in RB set1. The L subchannels from the end RB range of the first resource going forward are, that is, the first resource. By setting the end RB in the end subchannel of the first resource, that is, the end point of the first subchannel, it is possible to avoid selecting only the guard band and the resources in one RB set for the selected physical layer time-frequency resource.

[0048] i) The last RB in the last subchannel of the L subchannels having consecutive indexes is within the guard band.

[0049] This also limits the end point of the first resource. When the last RB in the last subchannel of the first resource is within the guard band, it indicates that the end point of the first resource is within the guard band. The first resource configured in this way can avoid the situation where only the resources within the guard band and one RB set are selected for the selected physical layer time-frequency resources.

[0050] j) The last subchannel among the L subchannels with consecutive indices includes RBs within the guard band.

[0051] Depending on the system configuration and usage environment, in some transmission scenarios, if resources within the guard band are used in sidelink transmission, it may affect the transmission. Therefore, the first resource may be L consecutive subchannels where the last subchannel includes RBs within the guard band, that is, as long as the last subchannel includes RBs within the guard band, it belongs to the resources to be excluded.

[0052] k) The number of RBs within the guard band included in the last subchannel among the L subchannels with consecutive indices exceeds a fourth threshold.

[0053] In this case, only when the number of RBs within the guard band included in the last subchannel exceeds the fourth threshold, it is determined that the L consecutive subchannels are the first resource and need to be excluded.

[0054] l) The ratio of the number of RBs within the guard band included in the last subchannel among the L subchannels with consecutive indices to the subchannel size exceeds a fifth threshold.

[0055] The larger the number of RBs in the guard band used for sidelink transmission, the higher the probability and degree of data transmission interference. Therefore, only when the ratio of the number of RBs in the guard band included in the last subchannel to the total number of RBs included in the subchannel exceeds the fifth threshold, the continuous L subchannels may be determined to be the first resource and need to be excluded.

[0056] m) The frequency-domain RBs included in L subchannels with consecutive indexes have different interleavings by different RB sets.

[0057] In one embodiment, when the SL resource pool is a resource based on the interleaving shown in FIG. 6, the first resource further includes those in which the RB set to which the L subchannels with consecutive indexes belong and the interleaved RBs in the interleaving resource are different by different RB sets. As shown in FIG. 6, when selecting candidate resources for four consecutive subchannels consisting of Sc4, Sc5, Sc6, and Sc7, the RB resources in interleaving 4 in RB set0 are used for this candidate resource, but those in interleavings 0, 1, and 2 in RB set1 are used. Therefore, the candidate resources consisting of four consecutive subchannels from Sc4 cannot be used and should be determined as the first resource.

[0058] In the first resource having any one of the above features a) to m), the first RB index, the second RB index, the first threshold, the second threshold, the third threshold, the fourth threshold, and the fifth threshold are system configurations or predefined ones. Alternatively, the first RB index, the second RB index, the first threshold, the second threshold, the third threshold, the fourth threshold, and the fifth threshold are related to at least one of the channel busy ratio (CBR), packet priority, channel access priority class (CAPC), and RB set index.

[0059] The features of the second resource are described below.

[0060] The second resource has any one of the following features w) to z).

[0061] w) The subchannels included have the same interleaving index across consecutive RB sets.

[0062] In the case of an SL resource pool mainly based on interleaving, that is, the SL resource pool shown in FIG. 6, the second resource includes L subchannels that are not completely continuous. If the interleaving indexes of the L subchannels are the same across consecutive RB sets, the L consecutive subchannels can be used as the second resource to be selected as the resource for sidelink transmission even if their indexes are not consecutive. For example, in FIG. 6, for the four subchannels Sc0, Sc1, Sc5, and Sc6, when starting from Sc0, only L consecutive subchannel resources can be determined and indicated by the conventional sidelink resource selection method. However, in this embodiment, since Sc0, Sc1, Sc5, and Sc6 have the same interleaving index in consecutive RB sets (RB set0 and RB set1) (both use interleaving 0 and interleaving 1), they are one of the available candidate resources.

[0063] x) The subchannels included have interleaving - consecutive indexes in any RB set.

[0064] In this case, if the L subchannels in one RB set have interleaving - consecutive indexes, the resource composed of these L subchannels can be used as the second resource.

[0065] y) The subchannels included have non - consecutive interleaving indexes in any RB set.

[0066] In this case, if the interleaving indexes of the L subchannels in one RB set are not consecutive, the resource composed of these L subchannels can be used as the second resource.

[0067] z) The included subchannels are in consecutive RB sets.

[0068] If the L subchannels are in consecutive RB sets, even if the indexes of the L subchannels are not consecutive or not completely consecutive, these L subchannels can be used as the second resource.

[0069] In one embodiment, the limiting rule regarding the above physical layer candidate time-frequency resource set is limited in the frequency domain. In the sidelink resource determination method according to the embodiments of the present application, the physical layer time-frequency resource includes one slot or a plurality of consecutive slots in the time domain. That is, when determining the physical layer time-frequency resource for the sidelink transmission opportunity from the physical layer candidate time-frequency resource set, the determination principle in the frequency domain is that the selected physical layer time-frequency resource occupies the same slot in the time domain, or the selected physical layer time-frequency resource occupies a plurality of consecutive slots in the time domain.

[0070] In one embodiment, the system configuration information includes indication information on whether to exclude the first resource, or includes indication information on whether to add the second resource, or includes indication information on whether to exclude the first resource and add the second resource.

[0071] In this embodiment, the first resource occupies L sub-channels having consecutive indices in the frequency domain, which means that the indices of the L sub-channels are arranged in ascending order from the smallest to the largest. A sub-channel with an index of k and a sub-channel with the smallest index larger than k among the L sub-channels are called a pair of adjacent sub-channels. The second resource occupies L sub-channels in the frequency domain and has at least one pair of non-consecutive adjacent sub-channels, which means that there are other sub-channel resources not belonging to the second resource between at least two adjacent sub-channels among the L sub-channels. For example, when the sub-carrier spacing (SCS) is 15 kHz, one sub-channel corresponds to one interleaving in one RB set. When L = 4 and the index of the starting sub-channel is 1, the indices of the sub-channels being 1, 2, 3, 4 means having consecutive indices of the L sub-channels. The indices of the sub-channels being 1, 2, 10, 11 or the indices of the sub-channels being 1, 3, 5, 7 means that the indices of two different sets of L sub-channels are not consecutive.

[0072] In step 720, a physical layer time-frequency resource for a sidelink transmission opportunity is determined from a physical layer candidate time-frequency resource set.

[0073] Once the physical layer candidate time-frequency resource set is determined, according to different resource selection methods, a physical layer time-frequency resource for a sidelink transmission opportunity can be determined from the physical layer candidate time-frequency resource set.

[0074] In this embodiment, the determined physical layer candidate time-frequency resource set either does not include the first resource, includes the second resource, or does not include the first resource and includes the second resource. As a result, when determining the physical layer time-frequency resources for the sidelink transmission opportunity, the selection range of the physical layer time-frequency resources is limited. After setting a reasonable range for the first resource and the second resource, it is possible to avoid selecting resources that are unavailable when the first node selects resources for sidelink transmission.

[0075] After selecting the physical layer time-frequency resources, the determined physical layer time-frequency resources may be any one of resource blocks (RBs) that are continuous in the frequency domain, different interleavings for a set of RBs that are continuous in the frequency domain, the same interleaving for a set of RBs that are continuous in the frequency domain, L consecutive subchannels, or L non-consecutive subchannels.

[0076] In the sidelink resource determination method according to this embodiment, after determining a set of physical layer candidate time-frequency resources for the sidelink transmission opportunity from the sidelink resource pool based on the system configuration information, the physical layer time-frequency resources for the sidelink transmission opportunity are determined from the set of physical layer candidate time-frequency resources, and the set of physical layer candidate time-frequency resources is configured to either not include the first resource, include the second resource, or not include the first resource and include the second resource. This can ensure that the resources selected for sidelink transmission can meet the transmission requirements and avoid the situation where transmission cannot be completed due to the selected resources for sidelink transmission being unavailable.

[0077] There are three methods for sidelink resource selection: full sensing, partial sensing, and random selection. Here, one of the sidelink resource selection methods is selected according to the upper layer configuration or pre-configuration of the first node.

[0078] In one embodiment, determining a physical layer candidate time-frequency resource set for a sidelink transmission opportunity based on system configuration information includes the MAC layer excluding a first resource from the physical layer candidate time-frequency resource set for the sidelink transmission opportunity, or the MAC layer adding a second resource to the physical layer candidate time-frequency resource set for the sidelink transmission opportunity, or the MAC layer excluding the first resource from the physical layer candidate time-frequency resource set for the sidelink transmission opportunity and adding the second resource. This is a resource selection performed by the MAC of the first node. In this case, the physical layer of the first node does not exclude or add sidelink transmission resources. After receiving the unfiltered physical layer candidate time-frequency resource set reported to the physical layer, the MAC layer of the first node excludes the first resource from the physical layer candidate time-frequency resource set, adds the second resource, or excludes the first resource and adds the second resource based on the system configuration information. Here, when the first node selects transmission resources in a full sensing or partial sensing manner, the MAC layer of the first node performs filtering of the transmission resources when receiving the physical layer candidate time-frequency resource set reported to the physical layer. When the first node selects transmission resources in a random selection manner, the MAC layer of the first node performs filtering of the transmission resources when making a random resource selection.

[0079] In one embodiment, determining a physical layer candidate time-frequency resource set for a sidelink transmission opportunity based on system configuration information includes the physical layer excluding a first resource when determining a physical layer candidate time-frequency resource for a sidelink transmission opportunity in a resource selection window, or the physical layer adding a second resource when determining a physical layer candidate time-frequency resource for a sidelink transmission opportunity in a resource selection window, or the physical layer excluding the first resource and adding the second resource when determining a physical layer candidate time-frequency resource for a sidelink transmission opportunity in a resource selection window. This is a resource selection performed by the physical layer of the first node, and the physical layer of the first node directly performs the narrowing down of transmission resources. Here, the resource selection window is the first step in the process of sidelink transmission. At this point, the physical layer candidate time-frequency resource set for the sidelink transmission opportunity has not yet been generated. When the physical layer of the first node determines a physical layer candidate time-frequency resource in all or part of the slots in the resource selection window, it can exclude the first resource, or add the second resource, or exclude the first resource and add the second resource.

[0080] In one embodiment, determining a physical layer candidate time-frequency resource set for a sidelink transmission opportunity based on system configuration information includes the physical layer excluding a first resource from the physical layer candidate time-frequency resource set for the initialized sidelink transmission opportunity, or the physical layer adding a second resource to the physical layer candidate time-frequency resource set for the initialized sidelink transmission opportunity, or the physical layer excluding the first resource from the physical layer candidate time-frequency resource set for the initialized sidelink transmission opportunity and adding the second resource. This is also a resource selection performed by the physical layer of the first node, where initialization is the fourth step in the process of sidelink transmission. At this point, the physical layer candidate time-frequency resource set for the sidelink transmission opportunity has been generated, and the physical layer of the first node performs the narrowing down of transmission resources during the initialization process. The physical layer of the first node can exclude the first resource from the physical layer candidate time-frequency resource set for the initialized sidelink transmission opportunity, or add the second resource, or exclude the first resource and add the second resource.

[0081] In one embodiment, determining a physical layer candidate time-frequency resource set for a sidelink transmission opportunity based on system configuration information includes the physical layer excluding a first resource from the physical layer candidate time-frequency resource set for the sidelink transmission opportunity reported to the MAC layer of the first node, or the physical layer adding a second resource to the physical layer candidate time-frequency resource set for the sidelink transmission opportunity reported to the MAC layer of the first node, or the physical layer excluding the first resource from and adding the second resource to the physical layer candidate time-frequency resource set for the sidelink transmission opportunity reported to the MAC layer of the first node. This is also a resource selection performed by the physical layer of the first node. Here, the physical layer reporting the physical layer candidate time-frequency resource set for the sidelink transmission opportunity to the MAC layer is the seventh step in the process of sidelink transmission. At this point, the physical layer candidate time-frequency resource set for the sidelink transmission opportunity has been generated and needs to be reported to the MAC layer of the first node. When the physical layer of the first node reports the physical layer candidate time-frequency resource set for the sidelink transmission opportunity to the MAC layer, it performs a narrowing down of transmission resources. The physical layer of the first node can exclude the first resource from the physical layer candidate time-frequency resource set for the sidelink transmission opportunity reported to the MAC layer, or add the second resource, or exclude the first resource and add the second resource.

[0082] FIG. 10 is a structural schematic diagram of a sidelink resource determination device according to an embodiment of the present application. As shown in FIG. 10, the sidelink resource determination device according to this embodiment includes a resource set determination module 101 and a resource selection module 102.

[0083] The resource set determination module 101 is used to determine a physical layer candidate time-frequency resource set for sidelink transmission opportunities from a sidelink resource pool based on system configuration information. The resource selection module 102 is used to determine a physical layer time-frequency resource for sidelink transmission opportunities from the physical layer candidate time-frequency resource set. Here, the physical layer candidate time-frequency resource set does not include a first resource that occupies L subchannels with continuous indexes in the frequency domain, or includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels without continuous indexes, or does not include a first resource that occupies L consecutive subchannels in the frequency domain and includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels without continuous indexes. L is an integer greater than or equal to 1.

[0084] The sidelink resource determination device according to this embodiment is used to execute the sidelink resource determination method in the embodiment shown in FIG. 7. Since the realization principle and technical effects are similar, they will not be described repeatedly here.

[0085] FIG. 11 is a structural schematic diagram of a sidelink resource determination device according to an embodiment of the present application. As shown in FIG. 11, this sidelink resource determination device includes a processor 111, a memory 112, a receiver 113, and a transmitter 114. The number of processors 111 in the sidelink resource determination device may be one or more. However, in FIG. 11, one processor 111 is taken as an example. The processor 111, memory 112, receiver 113, and transmitter 114 in the sidelink resource determination device may be connected by a bus or other means. However, in FIG. 11, being connected by a bus is taken as an example.

[0086] Memory 112 may be used as a computer-readable storage medium to store software programs, computer-executable programs, and modules, such as program instructions and modules corresponding to the sidelink resource determination method in the embodiment of FIG. 7 of the present application. The processor 111 applies various functions and data processing of the sidelink resource determination device by executing the software programs, instructions, and modules stored in the memory 112, that is, realizes the above sidelink resource determination method.

[0087] The memory 112 may mainly include a program storage area capable of storing an operating system and application programs required for at least one function, and a data storage area capable of storing data created by using the sidelink resource determination device, etc. Further, the memory 112 may include a high-speed random access memory, and for example, may include a non-volatile memory such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid storage devices.

[0088] The receiver 113 is any one or more combinations of devices or modules having the ability to receive radio signals, and the transmitter 114 is any one or more combinations of devices or modules having the ability to transmit radio signals.

[0089] An embodiment of the present application further provides a storage medium including computer-executable instructions for executing a sidelink resource determination method when executed by a computer processor. The method includes determining, based on system configuration information, a set of physical layer candidate time-frequency resources for a sidelink transmission opportunity from a sidelink resource pool, and determining a physical layer time-frequency resource for the sidelink transmission opportunity from the set of physical layer candidate time-frequency resources. The set of physical layer candidate time-frequency resources does not include a first resource that occupies L subchannels having consecutive indices in the frequency domain, or includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels that do not have consecutive indices, or does not include a first resource that occupies L consecutive subchannels in the frequency domain and includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels that do not have consecutive indices. L is an integer greater than or equal to 1.

Claims

1. A sidelink resource determination method applied to a first node, comprising: determining, based on system configuration information, a set of physical layer candidate time-frequency resources for a sidelink transmission opportunity from a sidelink resource pool; and determining, from the set of physical layer candidate time-frequency resources, a physical layer time-frequency resource for a sidelink transmission opportunity, wherein the set of physical layer candidate time-frequency resources: does not include a first resource that occupies L sub-channels with consecutive indexes in the frequency domain, or includes a second resource that occupies L sub-channels in the frequency domain and has at least one pair of adjacent sub-channels without consecutive indexes, or neither includes a first resource that occupies L consecutive sub-channels in the frequency domain nor includes a second resource that occupies L sub-channels in the frequency domain and has at least one pair of adjacent sub-channels without consecutive indexes, where L is an integer greater than or equal to 1; A sidelink resource determination method.

2. The physical layer time-frequency resource includes one slot or a plurality of consecutive slots in the time domain; The method according to claim 1.

3. The system configuration information includes indication information on whether to exclude the first resource, or includes indication information on whether to add the second resource, or includes indication information on whether to exclude the first resource and add the second resource; The method according to claim 1.

4. The first resource: the index of the first resource block RB in the first sub-channel among the L sub-channels with consecutive indexes is greater than or equal to the first RB index of the nth RB set and less than or equal to the index of the first RB in the (n + 1)th RB set; the first RB in the first sub-channel among the L sub-channels with consecutive indexes is within the guard band; the first sub-channel among the L sub-channels with consecutive indexes includes an RB within the guard band; the number of RBs within the guard band included in the first sub-channel among the L sub-channels with consecutive indexes exceeds a first threshold. The ratio of the number of RBs in the guard band included in the first sub-channel among the L sub-channels having consecutive indexes with respect to the sub-channel size exceeds a second threshold, and The frequency-domain RB resources in the L sub-channels having consecutive indexes simultaneously include the RBs in the RB set and the RBs in the guard band, and the number of RBs in the guard band exceeds a third threshold, At least one of the sub-channels included in the L sub-channels having consecutive indexes includes RBs in the guard band, The index of the last RB in the last sub-channel among the L sub-channels having consecutive indexes is greater than or equal to the index of the last RB in the nth RB set and less than or equal to the second RB index of the (n + 1)th RB set, The last RB in the last sub-channel among the L sub-channels having consecutive indexes is within the guard band, The last sub-channel among the L sub-channels having consecutive indexes includes RBs in the guard band, The number of RBs in the guard band included in the last sub-channel among the L sub-channels having consecutive indexes exceeds a fourth threshold, The ratio of the number of RBs in the guard band included in the last sub-channel among the L sub-channels having consecutive indexes with respect to the sub-channel size exceeds a fifth threshold, The frequency-domain RBs included in the L sub-channels having consecutive indexes are characterized by any one of different interleavings by different RB sets, The method according to claim 1.

5. The first RB index, the second RB index, the first threshold, the second threshold, the third threshold, the fourth threshold, and the fifth threshold are Determined by the system configuration or predefined, or Related to at least one of the channel busy ratio CBR, packet priority, channel access priority CAPC, and RB set index, The method according to claim 4.

6. The second resource is The included sub-channels have the same interleaving index across consecutive RB sets, The included subchannels have interleaved consecutive indexes in any RB set, The included subchannels have non - consecutive interleaved indexes in any RB set, The included subchannels are in consecutive RB sets, and are characterized by any one of the above. The method according to claim 1.

7. Determining a physical layer candidate time - frequency resource set for a sidelink transmission opportunity from a sidelink resource pool based on system configuration information, The media access control (MAC) layer excludes the first resource from the physical layer candidate time - frequency resource set for the sidelink transmission opportunity, or, The MAC layer adds the second resource to the physical layer candidate time - frequency resource set for the sidelink transmission opportunity, or, The MAC layer includes excluding the first resource from the physical layer candidate time - frequency resource set for the sidelink transmission opportunity and adding the second resource. The method according to any one of claims 1 to 6.

8. Determining a physical layer candidate time - frequency resource set for a sidelink transmission opportunity from a sidelink resource pool based on system configuration information, When the physical layer determines the physical layer candidate time - frequency resources for the sidelink transmission opportunity in a resource selection window, it excludes the first resource, or, When the physical layer determines the physical layer candidate time - frequency resources for the sidelink transmission opportunity in a resource selection window, it adds the second resource, or, When the physical layer determines the physical layer candidate time - frequency resources for the sidelink transmission opportunity in a resource selection window, it includes excluding the first resource and adding the second resource. The method according to any one of claims 1 to 6.

9. Determining a physical layer candidate time - frequency resource set for a sidelink transmission opportunity from a sidelink resource pool based on system configuration information, The physical layer excludes the first resource from the physical layer candidate time - frequency resource set for the initialized sidelink transmission opportunity, or, The physical layer adds the second resource to the physical layer candidate time - frequency resource set for the initialized sidelink transmission opportunity, or, The physical layer excludes the first resource from a set of candidate physical layer time-frequency resources for a sidelink transmission opportunity that has been initialized, and includes adding the second resource. The method according to any one of claims 1 to 6.

10. Based on the system configuration information, determining a set of candidate physical layer time-frequency resources for a sidelink transmission opportunity from a sidelink resource pool includes: The physical layer excludes the first resource from a set of candidate physical layer time-frequency resources for a sidelink transmission opportunity reported to the MAC layer of the first node, or The physical layer adds the second resource to a set of candidate physical layer time-frequency resources for a sidelink transmission opportunity reported to the MAC layer of the first node, or The physical layer excludes the first resource from a set of candidate physical layer time-frequency resources for a sidelink transmission opportunity reported to the MAC layer of the first node, and includes adding the second resource. The method according to any one of claims 1 to 6.

11. A memory configured to store a program, and A processor configured to execute the program, wherein when the program is executed, based on the system configuration information, a set of candidate physical layer time-frequency resources for a sidelink transmission opportunity is determined from a sidelink resource pool, a physical layer time-frequency resource for a sidelink transmission opportunity is determined from the set of candidate physical layer time-frequency resources, the set of candidate physical layer time-frequency resources does not include a first resource that occupies L subchannels having consecutive indexes in the frequency domain, or includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels that do not have consecutive indexes, or does not include a first resource that occupies L consecutive subchannels in the frequency domain, and includes a second resource that occupies L subchannels in the frequency domain and has at least one pair of adjacent subchannels that do not have consecutive indexes, where L is an integer greater than or equal to 1. Sidelink resource determination device.

12. When executed, includes a stored program that executes the sidelink resource determination method according to any one of claims 1 to 10. Non-volatile storage medium.

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