A sidelink resource selection method, apparatus and terminal

Abstract

The application discloses a kind of direct link resource selection method, device and terminal, it is related to vehicle networking technical field, the method comprises: when carrying out service transmission, the first terminal executes at least one of the following: when meeting first condition, the first terminal carries out service transmission by first physical channel structure in first resource pool;The first terminal carries out service transmission by second physical channel structure in the first resource pool or second resource pool;Wherein, the first physical channel structure is different from the second physical channel structure, and the second resource pool includes the resource in the first resource pool.The scheme of the application, by setting the first condition, realizes that under the first condition, first terminal can carry out service transmission by first physical channel in first resource pool, or, carry out service transmission by second physical channel structure in first resource pool or the second resource pool including the resource of first resource pool, realizes channel coexistence.

Description

Technical Field

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

[0002] Currently, Long Term Evolution (LTE) sidelinks have their own dedicated spectrum allocations, while New Radio (NR) sidelink spectrum allocations are still undetermined. Because some countries and regions have limited spectrum resources allocated to Cellular Vehicile to Everything (C-V2X) (e.g., only 30MHz in the US), and to support the technology migration from LTE sidelinks to NR sidelinks, it is necessary to study coexistence of LTE and NR sidelinks on the same channel. Currently, there is no solution for coexistence on the same channel. Summary of the Invention

[0003] The purpose of this application is to provide a method, apparatus and terminal for selecting direct link resources, thereby enabling the coexistence of different physical channel structures.

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

[0005] During service transmission, the first terminal performs at least one of the following:

[0006] When the first condition is met, the first terminal performs service transmission in the first resource pool through the first physical channel structure.

[0007] The first terminal transmits services in the first resource pool or the second resource pool through the second physical channel structure;

[0008] The first physical channel structure is different from the second physical channel structure, and the second resource pool includes the resources in the first resource pool.

[0009] Secondly, in order to achieve the above objectives, embodiments of this application provide a direct link resource selection device, applied to a first terminal, the device comprising:

[0010] The execution module is configured to, during service transmission, have the first terminal perform at least one of the following:

[0011] When the first condition is met, the first terminal performs service transmission in the first resource pool through the first physical channel structure.

[0012] The first terminal transmits services in the first resource pool or the second resource pool through the second physical channel structure;

[0013] The first physical channel structure is different from the second physical channel structure, and the second resource pool includes the resources in the first resource pool.

[0014] Thirdly, in order to achieve the above objectives, embodiments of this application provide a terminal, including a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program to implement the pass-through link resource selection method as described in the first aspect.

[0015] Fourthly, in order to achieve the above objectives, embodiments of this application provide a readable storage medium having a program or instructions stored thereon, which, when executed by a processor, implement the pass-through link resource selection method as described in the first aspect.

[0016] The above-mentioned technical solution of this application has at least the following beneficial effects:

[0017] The direct link resource selection method of this application embodiment, when a first terminal performs service transmission, executes at least one of the following: when a first condition is met, the first terminal performs service transmission in a first resource pool through a first physical channel structure; the first terminal performs service transmission in the first resource pool or a second resource pool through a second physical channel structure; wherein the first physical channel structure is different from the second physical channel structure, and the second resource pool includes resources in the first resource pool. Thus, under the first condition, the first terminal can utilize resources in the first resource pool to perform service transmission through the first physical channel structure, or perform service transmission in the first resource pool or a second resource pool including resources in the first resource pool through the second physical channel structure, achieving the coexistence of different physical channel structures. Attached Figure Description

[0018] Figure 1 This is a flowchart illustrating the direct link resource selection method according to an embodiment of this application.

[0019] Figure 2A This is one of the schematic diagrams illustrating resource allocation in an embodiment of this application;

[0020] Figure 2B This is a second schematic diagram illustrating resource allocation in an embodiment of this application.

[0021] Figure 2C This is the third schematic diagram illustrating resource allocation in an embodiment of this application;

[0022] Figure 2DThis is the fourth schematic diagram illustrating resource allocation in an embodiment of this application;

[0023] Figure 2E This is the fifth schematic diagram illustrating resource allocation in an embodiment of this application;

[0024] Figure 2F This is the sixth schematic diagram illustrating resource allocation in an embodiment of this application.

[0025] Figure 2G This is the seventh schematic diagram illustrating resource allocation in an embodiment of this application.

[0026] Figure 3A This is one of the schematic diagrams of RSSI measurement in the embodiments of this application;

[0027] Figure 3B This is the second schematic diagram of RSSI measurement in the embodiments of this application;

[0028] Figure 4 This is a schematic diagram illustrating resource exclusion in the embodiments of this application;

[0029] Figure 5 This is a schematic diagram illustrating resource reselection based on shared information in an embodiment of this application;

[0030] Figure 6 This is a schematic diagram illustrating resource reselection based on coordination information in an embodiment of this application;

[0031] Figure 7 This is a schematic diagram illustrating the reselection of resources that have collided in this embodiment of the application.

[0032] Figure 8 This is a schematic diagram illustrating the reselection of all resources in an embodiment of this application;

[0033] Figure 9 This is a schematic diagram of the direct link resource selection device according to an embodiment of this application;

[0034] Figure 10 This is a schematic diagram of the terminal structure according to an embodiment of this application. Detailed Implementation

[0035] To make the technical problems, technical solutions, and advantages of this application clearer, a detailed description will be provided below in conjunction with the accompanying drawings and specific embodiments. In the following description, specific details such as particular configurations and components are provided merely to aid in a comprehensive understanding of the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Furthermore, for clarity and brevity, descriptions of known functions and structures have been omitted.

[0036] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0037] In the various embodiments of this application, it should be understood that the sequence number of each process described below does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0038] In the embodiments provided in this application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information.

[0039] Before introducing the present invention, the applicant will briefly introduce the Type A device and Type B device mentioned in the embodiments of the present invention.

[0040] Type A devices: Rel-18 dual-module devices, which have both an LTE sidelink module and an NR sidelink module;

[0041] Type B devices: Rel-14 / Rel-15 devices, containing only the LTE sidelink module.

[0042] In Rel-18, the main research focuses on co-channel coexistence of LTE sidelink mode 4 and NR sidelink mode 2. Both LTE sidelink mode 4 and NR sidelink mode 2 employ distributed resource scheduling (i.e., UE autonomously selects transmission resources), using a sensing mechanism to determine the resource occupancy of other UEs in the same system, and then eliminating or selecting resources based on the sensing results. However, currently, there is no solution to achieve co-channel coexistence; therefore, such as... Figure 1 As shown, this application provides a direct link resource selection method applied to a first terminal, wherein the first terminal is a terminal that supports coexistence of the same channel, for example, the first terminal is a terminal that supports transmission using both NR sidelink physical channel structure and LTE sidelink physical channel structure (e.g., a Type A device), and the method includes:

[0043] Step 101: During service transmission, the first terminal performs at least one of the following:

[0044] When the first condition is met, the first terminal performs service transmission in the first resource pool through the first physical channel structure.

[0045] The first terminal transmits services in the first resource pool or the second resource pool through the second physical channel structure;

[0046] The first physical channel structure is different from the second physical channel structure. For example, the first physical channel structure is an NR Sidelink physical channel structure, and the second physical channel structure is an LTE Sidelink physical channel structure. The second resource pool includes the resources in the first resource pool.

[0047] It should be noted that this first resource pool can be used for service transmission in both the first and second physical channel structures. For the first terminal, the configuration of this first resource pool can be configured through a single resource pool configuration information, where the first resource pool is shared by both the NR sidelink and LTE sidelink; alternatively, two resource pool configuration information can be configured with the same time-frequency resources, namely a first resource pool and a third resource pool, where the resources in the first resource pool are identical to those in the third resource pool, with the first resource pool being used by the NR sidelink and the third resource pool by the LTE sidelink; or, the resources configured for the second physical channel structure include the resources in the first resource pool, for example, the first resource pool is used by the NR sidelink, and the second resource pool is used by the LTE sidelink, where the resources in the second resource pool include resources dedicated to the LTE sidelink and resources from the first resource pool. Other terminals that can only transmit using the second physical channel structure (e.g., Type B devices) can also be configured with either the first or second resource pool.

[0048] The direct link resource selection method of this application embodiment, when a first terminal performs service transmission, executes at least one of the following: when a first condition is met, the first terminal performs service transmission in a first resource pool through a first physical channel structure; the first terminal performs service transmission in the first resource pool or a second resource pool through a second physical channel structure; wherein the first physical channel structure is different from the second physical channel structure, and the second resource pool includes resources in the first resource pool. Thus, under the first condition, the first terminal can utilize resources in the first resource pool to perform service transmission through the first physical channel structure, or perform service transmission in the first resource pool or a second resource pool including resources in the first resource pool through the second physical channel structure, achieving coexistence of transmission with different physical channel structures on the same channel.

[0049] The configuration of the resource pool related to the method in the embodiments of this application will be described below:

[0050] I. Resource Allocation

[0051] For the same frequency domain channel, resources are divided into logical time units within 10240ms in the time domain and allocated to the LTE sidelink and NR sidelink respectively. The LTE sidelink and NR sidelink select time-frequency resources for transmitting service packets from the allocated resources. The LTE sidelink can be the LTE sidelink module in a Type A device or a Type B device, and the NR sidelink can be the NR sidelink in a Type A device.

[0052] The allocation of logical time units available for sidelink within 10240ms is performed over L consecutive logical time units, and this allocation is repeated over logical time units within 10240ms with a period of L:

[0053] L can take the value 16, 20, or 100;

[0054] The L consecutive logical time units are divided as follows: N logical time units are allocated as dedicated logical time units for NR sidelink PSCCH / PSSCH / PSFCH (Physical Sidelink Feedback Channel), N≥0; P logical time units are allocated as dedicated logical time units for LTE sidelink PSCCH / PSSCH, P≥0; and Q logical time units are dynamically shared logical time units (transmitting PSCCH / PSSCH) between LTE sidelink and NR sidelink, Q≥1; and N+P+Q=L. The dedicated logical time units for NR sidelink PSCCH / PSFCH / PSFCH, the dedicated logical time units for LTE sidelink PSCCH / PSSCH, and the dynamically shared logical time units between LTE sidelink and NR sidelink do not overlap. The specific allocation within the L consecutive logical time units can be as follows:

[0055] (1) In the special case where N=P=0 and Q=L: the entire logical time unit within 10240ms is used as a shared resource for both the LTE sidelink and the NR sidelink. Specifically, such as... Figure 2A As shown, the time unit for resource allocation is the subframe. The available logical subframes within 10240ms of this shared frequency domain channel can be divided as follows: L=20, N=P=0, Q=L=20. All logical subframes within 10240ms are used as shared resources for both the LTE sidelink and the NR sidelink, and only one resource pool is allocated to each of the LTE sidelink and the NR sidelink.

[0056] (2) N=0, P+Q=L (P≥1, Q≥1): Q dynamically shared logical time units are divided into F groups of subframes, 1≤F≤Q, each group contains consecutive logical time units (the number of consecutive logical time units in each group can be the same or different), and there is a gap between F groups; P logical time units (LTE sidelink PSCCH / PSSCH dedicated logical time units) are divided into G groups, 1≤G≤P, each group contains consecutive logical time units (the number of consecutive logical time units in each group can be the same or different), and there is a gap between G groups;

[0057] (3) P = 0, N + Q = L (N ≥ 1, Q ≥ 1): Q dynamically shared logical time units are divided into F groups of subframes, 1 ≤ F ≤ Q, each group contains consecutive logical time units (the number of consecutive logical time units in each group can be the same or different), and there is a gap between F groups; N logical time units (NR sidelink PSCCH / PSSCH / PSFCH dedicated logical time units) are divided into G groups, 1 ≤ G ≤ N, each group contains consecutive logical time units (the number of consecutive logical time units in each group can be the same or different), and there is a gap between G groups;

[0058] (4) N+P+Q=L (N≥1, P≥1, Q≥1): Q dynamically shared logical time units are divided into F groups of subframes, 1≤F≤Q. Each group contains consecutive logical time units (the number of consecutive logical time units in each group can be the same or different), and there is a gap between the F groups; other types of logical time units adopt the same method. For example, P logical time units (LTE sidelink PSCCH / PSSCH dedicated logical time units) are divided into G groups, 1≤G≤P. Each group contains consecutive logical time units (the number of consecutive logical time units in each group can be the same or different), and there is a gap between the G groups; specifically:

[0059] a) such as Figure 2B and 2C As shown, the time unit for resource allocation is the subframe. The available logical subframes within 10240ms of this shared frequency domain channel can be divided as follows: L=20, N=4, P=6, Q=10.

[0060] Shared subframes are divided into two groups, each with five consecutive subframes. These two groups are logically spaced apart. LTE sidelink dedicated subframes are also divided into two groups, each with three consecutive subframes. These two groups are logically spaced apart. For LTE sidelink, shared and dedicated subframes are configured as two separate resource pools (e.g.,...). Figure 2B (as shown), or, configured as a resource pool (such as...) Figure 2C (As shown); the dedicated NR sidelink PSCCH / PSSCH / PSFCH subframes are divided into two groups, each with two subframes (one of which can transmit PSFCH), and the two groups of subframes are distributed at intervals in the logical subframes. In this embodiment, the SCS of the dedicated NR sidelink PSCCH / PSSCH / PSFCH subframes is 15kHz, and μ is 0;

[0061] b) such as Figure 2D and 2EAs shown, the time unit for resource allocation is the subframe. Within 10240ms of this shared frequency domain channel, the available logical subframes can be divided as follows: L=20, N=4, P=6, Q=10. Shared subframes are divided into 10 groups, each with one subframe, and these 10 groups are distributed with intervals within the logical subframes. Other types of subframes are also divided into individual subframes with intervals. In NRsidelink, two dedicated PSCCH / PSSCH / PSFCH subframes can transmit PSFCH. For LTE sidelink, shared subframes and dedicated subframes are configured as two resource pools. Figure 2D (as shown); or, configured as a resource pool (as shown); Figure 2E (As shown). In this embodiment, the SCS of the dedicated subframe for NR sidelink PSCCH / PSSCH / PSFCH is 15kHz, and μ is 0.

[0062] c) such as Figure 2F and 2G As shown, the time unit for resource allocation is the subframe. The available logical subframes within 10240ms of this shared frequency domain channel can be divided as follows: L=20, N=4, P=6, Q=10. Shared subframes are divided into 10 groups, each with one subframe, and these 10 groups are distributed with intervals within the logical subframes. Other types of subframes are also divided into individual subframes with intervals. In NRsidelink, four time slots corresponding to the dedicated PSCCH / PSSCH / PSFCH subframes can be used to transmit PSFCH. For LTEsidelink, shared subframes and dedicated subframes are configured as two resource pools (e.g., ...). Figure 2F (as shown), or, configured as a resource pool (such as...) Figure 2G (as shown); where, in this embodiment, the SCS of the dedicated subframe for NR sidelink PSCCH / PSSCH / PSFCH is 30kHz and μ is 1.

[0063] The aforementioned time unit can be a subframe or a time slot.

[0064] Here, it should be noted that the above Q dynamically shared logical time units can be evenly distributed over a logical time unit of length L, as in (1) above, and b) and c) in (4), where Q is a divisor of L.

[0065] II. Resource Pool Configuration

[0066] (1) There are two configuration scenarios for configuring a resource pool in the LTE sidelink to achieve the aforementioned resource allocation method:

[0067] a) When P is not equal to 0, the LTE sidelink is configured with two types of resources according to the allocated logical time unit: resources composed of dedicated subframes of LTE sidelink PSCCH / PSFCH, and resources composed of subframes dynamically shared by LTE sidelink and NR sidelink. At this time, these two types of resources can be configured as one resource pool (i.e., the second resource pool) or two resource pools (i.e., the first resource pool and the dedicated LTE SL resource pool).

[0068] b) When P equals 0, the LTE sidelink is configured with only one resource pool according to the allocated logical time unit, which is a resource pool composed of subframes dynamically shared by the LTE sidelink and NR sidelink (i.e., the first resource pool).

[0069] See Figures 2A to 2G For the configuration of each resource pool (configured by higher-level management or pre-configured):

[0070] The bitmap size is equal to L;

[0071] A bitmap(b0,b1,…,b) L-1 In the context of resource pools, the number of logical subframes allocated to this resource pool on the L logical subframes is represented by b. k =1 (0≤k≤L-1);

[0072] If the dynamically shared resource is configured as a separate resource pool, specifically for the shared resource pool bitmap(b0,b1,…,b…), L-1 It could be: The other bits are 0, where offset is the offset of the first "1" in the bitmap (for example, if offset = 0, then the first "1" is b0). L is the bitmap size, N is the number of bits configured as "1" in the bitmap, and the value of N is a divisor of L, 0≤i≤N-1;

[0073] If the resources consisting of dynamically shared resources and dedicated subframes for LTE sidelink PSCCH / PSFCH are configured as a resource pool, for the bitmap elements of shared resources in the bitmap elements, the special bitmap(b0,b1,…,b) L-1 ), Where offset is the offset position of the first "1" in the bitmap element of the shared resource in the bitmap (for example, if offset = 0, then the first "1" is b0). L is the bitmap size, and N is the number of bits in the bitmap elements of shared resources configured as "1". The value of N is a divisor of L, where 0 ≤ i ≤ N-1. Additionally, the bitmap element b corresponding to the dedicated subframe of the LTE sidelink PSCCH / PSFCH... k =1; other bitmap elements are 0;

[0074] (2) There are two configuration options for configuring a resource pool in NR sidelink to achieve the aforementioned resource allocation method:

[0075] a) When N is not equal to 0, the NR sidelink is configured with two resource pools according to the allocated logical time units. One is a resource pool composed of dedicated subframes of NR sidelink PSCCH / PSSCH / PSFCH, and the other is a resource pool composed of subframes dynamically shared by LTE sidelink and NR sidelink.

[0076] b) When N equals 0, the NR sidelink is configured with only one resource pool according to the allocated logical time unit, which is a resource pool composed of subframes dynamically shared by the LTE sidelink and the NR sidelink.

[0077] See Figures 2A to 2G For the configuration of the resource pool consisting of dedicated subframes of NR sidelink PSCCH / PSSCH / PSFCH (configured by higher layers or pre-configured), at least one of the following conditions must be met:

[0078] The bitmap size is equal to L*2μ, where μ is uniquely determined by the subcarrier spacing (SCS) of the resource pool.

[0079] L*2μ≤160;

[0080] A bitmap In the context, the b corresponding to the logical subframes or time slots allocated to this resource pool on the L logical subframes. k =1 (0≤k≤L-1);

[0081] See Figures 2A to 2G For the configuration of the resource pool consisting of shared subframes (configured by higher layers or pre-configured):

[0082] The bitmap size is equal to L*2μ, μ = 0, and μ is uniquely determined by the subcarrier spacing (SCS) of the resource pool.

[0083] A bitmap(b0,b1,…,b) L-1 In the context of resource pools, the b corresponding to the logical subframes allocated to the resource pool on the L logical subframes are... k=1 (0≤k≤L-1), and the other positions in the bitmap are 0;

[0084] Specifically, for the shared resource pool bitmap(b0,b1,…,b) L-1 It could be: Where offset is the offset position of the first "1" in the bitmap (for example, if offset = 0, then the first "1" is b0). L is the bitmap size, N is the number of bits configured as "1" in the bitmap, and the value of N is a divisor of L, 0≤i≤N-1; other bitmap elements are 0.

[0085] In short, in the above resource pool configuration, if the shared resource is used as a separate resource pool for LTE SL, for Type A devices, the resource pool corresponding to the shared resource is the same for LTE SL and NR SL. It can be configured for the LTE SL module and NR sidelink module of the Type A device through one resource pool configuration information; or it can be configured through two resource pool configuration information, with the same time and frequency resources configured in these two resource pools. If the shared resource and the dedicated LTE SL resource are used as a resource pool for LTE SL, for Type A devices, the shared resource can also be allocated to the LTE SL module and NR sidelink module of the Type A device through two resource pool configuration information. The resource pool configured for the LTE SL module of the Type A device includes the resources in the resource pool configured for the NR sidelink module (i.e., the shared resource).

[0086] As an optional implementation, the first condition includes at least one of the following:

[0087] (1) The first terminal uses a periodic resource reservation method for transmission;

[0088] (2) The period of the periodic resources reserved by the first terminal is included in the set of resource reservation periods configured for the first resource pool;

[0089] (3) The subcarrier spacing of the first physical channel structure and the second physical channel structure is the same; for example, the subcarrier spacing is 15kHz.

[0090] (4) Disable the resource reassessment function in the first resource pool that uses the first physical channel for transmission;

[0091] (5) Disable the resource preemption function in the first resource pool that uses the first physical channel for transmission;

[0092] (6) The ratio of the period of the received signal strength index RSSI measurement transmitted using the second physical channel structure to the period of the periodic resource reserved by the first terminal is an integer.

[0093] Specifically, the first value is obtained by comparing the logical time slot period of the periodic resource reserved by the first terminal with the second value. The logical time slot period of the periodic resource reserved by the first terminal is obtained by converting the period of the periodic resource reserved by the first terminal, and the second value is the ratio of the number of bits configured as the third value to the length of the bitmap in the configuration of the first resource pool.

[0094] In other words, the resource reservation period P transmitted by the first terminal through the first physical channel structure rsvp Requirements: Resource reservation period P rsvp According to the formula Converted into logical time slot P′ rsvp Then, according to P′ rsvp The first value obtained by / R must be able to divide all possible RSSI measurement periods of the LTE sidelink simultaneously (R is the ratio of the number of bits configured as 1 in the bitmap when NRSL is configured in the shared resource pool (first resource pool) to the bitmap size L).

[0095] (7) The product of the first value and the number of resource reservations made by the first terminal for service transmission through the first physical channel structure is greater than or equal to the length of the resource selection window, wherein the resource selection window is a window for the first terminal to select resources for transmission through the second physical channel structure.

[0096] In this condition, the number of times the resource can be reserved can be the minimum, average, or maximum value of the range of reservations.

[0097] (8) The number of candidate resources for the first terminal to transmit services through the first physical channel structure in the first resource pool is greater than or equal to the number of transmissions of the current transmission block TB transmitted through the first physical channel structure.

[0098] In this application embodiment, when the terminal transmitting with the LTE sidelink physical channel (second physical channel structure) performs the LTE sidelink resource selection process on the first resource pool or the second resource pool, the RSSI measurement in the resource selection process is periodic. The first condition (1) in this application can ensure that the transmission with the NR sidelink physical channel (first physical channel structure) is also periodic. In this way, the RSSI measurement step can measure the periodic transmission with the NR sidelink physical channel within the LTE sidelink sensing window time range.

[0099] In this embodiment of the application, (2) in the first condition can ensure that the period when the first terminal transmits in the first resource pool using the NRsidelink physical channel (first physical channel structure) is the period supported in the first resource pool;

[0100] In this application embodiment, the first condition (3) can ensure that the temporal resource granularity when the first terminal transmits in the first resource pool using the NRsidelink physical channel (first physical channel structure) is consistent with the temporal resource granularity when transmitting using the LTE sidelink physical channel (second physical channel structure), and will not cause automatic gain control (AGC) problems.

[0101] In this embodiment of the application, the first conditions (4) and (5) can respectively ensure that the periodic reservation resources of the first terminal when performing periodic transmission in the first resource pool using the NR sidelink physical channel (first physical channel structure) will not be partially or all reselected within the reservation number range, and ensure that when the terminal performing transmission using the LTE sidelink physical channel (second physical channel structure) executes the LTE sidelink resource selection process in the first or second resource pool, the RSSI measurement step in the resource selection process can measure the transmission using the NR sidelink physical channel (first physical channel structure) within the LTE sidelink perception window time range;

[0102] In this embodiment of the application, the first condition (6) can ensure that when the terminal transmitting with the LTE sidelink physical channel (second physical channel structure) performs the LTE sidelink resource selection process on the resource pool containing shared resources, the RSSI measurement period in the resource selection process matches the period of the first terminal transmitting with the NR sidelink physical channel (first physical channel structure) in the first resource pool, so that the transmission with the NR sidelink physical channel (first physical channel structure) can be measured within the LTE sidelink perception window time range in the RSSI measurement step.

[0103] In the embodiments of this application, the first condition (7) can ensure that when a terminal transmitting on the LTE sidelink physical channel (second physical channel structure) performs the LTE sidelink resource selection process on a resource pool containing shared resources, the RSSI measurement step in the resource selection process can measure more transmissions transmitted on the NRsidelink physical channel (first physical channel structure) within the LTE sidelink sensing window time range.

[0104] Below, examples will be used to further illustrate conditions (6) and (7) in the first condition:

[0105] Resource reservation period P for NR SL data transmission by Type A device (first terminal) rsvp It can be an integer from 0 to 99, 100, 200, 300, ..., 900, 1000. 0 indicates that NR SL is a non-periodic service. In the dynamic shared resource pool, this application embodiment does not support NR SL as a non-periodic service, so it is not considered. The supported resource reservation period P for NR SL is... rsvp According to the formula Converted into logical time slot P′ rsvp Afterwards, at least one of the following conditions must be met:

[0106] 1) According to P′ rsvp The integer obtained by / R must be divisible by all possible RSSI measurement periods of LTE SL.

[0107] 2) According to P′ rsvp / R The integer obtained * number of resource reservations ≥ 10 * P step (The number of resource reservations is the maximum value within the range of resource reservations).

[0108] To perform full sensing using an LTE sidelink, the resource pool configuration of the LTE sidelink corresponds to the P.step The value is 100, and the length of the sensing window is 10*P. step =1000ms, the resource pool configuration of LTE sidelink and NR sidelink corresponds to b) or c) in resource allocation (4) (e.g. Figure 2D , 2E Taking a bitmap size of L=20 and Q=10 in NRsidelink (2F, 2G) as an example, the first resource pool T′ in NRsidelink transmission at this time... max =5080, R=0.5, NR sidelink resource reservation period P for some periodic services rsvp Converted into logical time slot P′ rsvp The results are shown in Table 1 below:

[0109]

[0110]

[0111] Table 1

[0112] Assuming that all possible resource reservation periods for LTE SL are greater than or equal to 100ms (RSSI measurement period is Pstep = 100ms), then the resource reservation period P of NR SL that satisfies condition 1) is... rsvp The resource reservation period P of NR SL can be 1ms, 2ms, 4ms, 10ms, 20ms, 50ms, or 100ms, satisfying condition 2). rsvp The resource reservation period P of NR SL can be 20ms, 25ms, 50ms, or 100*n (n = 1, 2, 3, ..., 10)ms, simultaneously satisfying conditions 1) and 2). rsvp It can be 20ms, 50ms, or 100ms.

[0113] This assumes that all possible resource reservation periods for LTE SL are 100ms and 50ms (RSSI measurement period is Pstep = 100ms or P...). step *50 / 100=50ms), then the resource reservation period P of NR SL that satisfies condition 1) rsvp The resource reservation period P of NR SL can be 1ms, 2ms, 10ms, or 50ms, then condition 2) is satisfied. rsvp The resource reservation period P of NR SL can be 20ms, 25ms, 50ms, or 100*n (n = 1, 2, 3, ..., 10)ms, simultaneously satisfying conditions 1) and 2). rsvp It can be 50ms.

[0114] In this application, the first terminal determines the resource reservation period P that NR SL can use. rsvp Then, select a resource reservation period P. rsvp Service transmission takes place in the first resource pool. Considering that LTE sidelink and NR sidelink transmit services directly on overlapping time-frequency resources, the LTE sidelink module (e.g., the LTE sidelink module of a Type A device (the first terminal) and a Type B device) may be unable to decode the NR sidelink's SCI. This could lead to the LTE sidelink module being unable to exclude retransmissions or periodically reserved resources indicated by the NR sidelink from the resource selection window during resource exclusion. Consequently, it might select retransmissions or periodically reserved resources indicated by the NR sidelink during resource selection, resulting in transmission resource collisions. In this alternative implementation, a first condition is set so that the resource reservation period P for NR sidelink service transmission... rsvp Matching the RSSI measurement period of the LTE sidelink, the resources reserved by the NR sidelink can be prioritized as low as possible when the RSSI of the LTE sidelink is sorted, so as to avoid resource collisions caused by the LTE sidelink selecting the resources reserved by the NR sidelink.

[0115] It should be noted that after the resource pool is configured, when a Type A device or a Type B device performs LTE SL transmission, the resource selection process to obtain candidate resources can be performed as follows: In the LTE SL resource pool containing dynamically shared subframes, the LTE sidelink transmission of Type A devices and Type B devices uses the existing resource selection process to perform resource awareness, exclusion, and selection.

[0116] like Figure 3A As shown, the resource pool configuration corresponding to the LTE sidelink is P step When the transmission service period of the LTE SL supported in the resource pool of the LTE sidelink containing shared resources is greater than or equal to 100ms, the RSSI measurement period of the LTE SL is exactly 100ms. Taking the resource pool configuration as described above (in the case of (4)b) in resource allocation) bitmap size L=20, Q=10, R=0.5 as an example, the resource reservation period P of a certain NR SL in the shared resource pool is 100ms. rsvp It is 100ms, the logical resource reservation period P′ within the shared resource pool. rsvp It's 50ms, P′ rsvp / R is 100ms. Figure 3A The resource blocks shown in the upper half of the diagram represent resources periodically occupied and reserved in the shared resource pool during a specific transmission in the NR SL initial retransmission. The RSSI measurement period for LTE SL is exactly 100ms, meaning RSSI measurement can measure each transmission of NR SL within the perception window (resulting in a higher smoothing power for the candidate resource block). During final sorting, this resource can be prioritized for lower-priority use, or even avoided altogether, to minimize resource collisions.

[0117] like Figure 3B The resource pool configuration corresponding to the LTE sidelink step When the transmission service period of the LTE SL supported in the resource pool of the LTE sidelink containing shared resources is greater than or equal to 100ms, the RSSI measurement period of the LTE SL is 100ms. Taking the bitmap size L=20, Q=10, R=0.5 in the resource pool configuration as described above (case b) in resource allocation (4) as an example, the resource reservation period P of a certain NR SL in the shared resource pool is 100ms. rsvp It is 50ms, the logical resource reservation period P′ within the shared resource pool. rsvp It is 25ms, P′ rsvp / R is 50ms, Figure 3B The resource blocks in the upper half of the diagram represent resources periodically occupied and reserved in the shared resource pool during a specific transmission in the NRSL initial retransmission. Therefore, RSSI measurement can measure a portion of the NRSL transmissions within the perception window (resulting in higher smoothing power for the candidate resource block), see... Figure 3B The lower half of the resource block (the 2nth resource block in the perception window [n-1000, n-1] is the measured NR SL transmission, and the 2n+1th resource block is the unmeasured transmission. Although only some transmissions are measured, the smoothing power of the corresponding candidate resource in the resource selection window should also be relatively high, so the smoothing power of this candidate resource block is relatively high) can be used as low priority as possible during the final sorting, or even not used at all, to avoid resource collisions as much as possible.

[0118] Furthermore, as an optional implementation, the method also includes:

[0119] Acquire first information related to service transmission through the first physical channel structure;

[0120] Based on the first information, resource selection is performed to obtain resources for service transmission through the first physical channel structure.

[0121] In other words, after the resource pool is configured, the first information related to the service transmission of the first physical channel structure can be obtained first. Then, based on the first information, resource selection is performed to select the resources that can be transmitted through the first physical channel structure. In this way, resource collisions are reduced and dynamic resource pool sharing is realized.

[0122] As a specific implementation, the first information includes at least one of the following:

[0123] Prioritizing service transmission through the first physical channel structure;

[0124] The latency requirement for service transmission through the first physical channel structure;

[0125] The number of sub-channels used for service transmission through the first physical channel structure;

[0126] The number of times the service is transmitted in the current TB through the first physical channel structure;

[0127] Resource selection window information for service transmission through the first physical channel structure;

[0128] Bitmap information of the first resource pool.

[0129] As a specific implementation, based on the first information, resource selection is performed to obtain resources for service transmission through the first physical channel structure, including:

[0130] Based on the first information, a resource selection process for service transmission through the second physical channel structure is executed to obtain a first candidate resource set;

[0131] From the first set of candidate resources, resources that are used for service transmission through the first physical channel structure are selected.

[0132] The implementation process of this specific embodiment is as follows: The LTE SL module of the first terminal executes the resource selection process for service transmission via LTE SL, selects a transmission resource set (first candidate resource set), and then sends the first candidate resource set to the NR SL module of the first terminal. Finally, the NR SL module selects resources for NR SL transmission from the obtained first candidate resource set; or the LTE SL module of the first terminal executes the resource selection process for service transmission via LTE SL, selects a transmission resource set (first candidate resource set), then selects resources for NRSL transmission from the first candidate resource set, and then sends the selected resources to the NR SL module of the first terminal.

[0133] As another specific implementation, based on the first information, resource selection is performed to obtain resources for service transmission through the first physical channel structure, including:

[0134] (1) Based on the first information, execute the resource selection process for service transmission through the second physical channel structure to obtain a first candidate resource set; specifically, the LTE SL module of the first terminal may select resources according to the first information and the existing LTE SL resource selection process to obtain the first candidate resource set, and then send the first candidate resource set to the NR SL module of the first terminal; wherein, the first terminal may be a Type A device;

[0135] (2) Execute the resource selection process for service transmission through the first physical channel structure to obtain the second candidate resource set; specifically, this step may be that the NR SL module of the first terminal executes the existing NR SL resource selection process to obtain the second candidate resource set.

[0136] (3) If the number of shared resources between the first candidate resource set and the second candidate resource set is greater than or equal to the number of transmissions of the current TB through the first physical channel structure, then the resource through the first physical channel structure is selected from the shared resources.

[0137] (4) If the number of resources shared by the first candidate resource set and the second candidate resource set is less than the number of transmissions of the current TB through the first physical channel structure, then the resources for service transmission through the first physical channel structure are selected from the first candidate resource set.

[0138] In this specific embodiment, after executing the above steps (1) and (2), the first terminal can obtain the first candidate resource set and the second candidate resource set. Steps (3) and (4) are different steps executed according to different situations. Specifically, the first terminal (specifically, the NR SL module in the first terminal) obtains the intersection of the first candidate resource set and the second candidate resource set, that is: obtains the common resources in the first candidate resource set and the second candidate resource set; if the number of common resources is greater than or equal to the current TB transmission count of NR SL (first channel physical structure), then the NR SL module of the first terminal selects the resources for NR SL transmission from these common resources; otherwise (i.e., the number of common resources is less than the NR SL transmission count), the NR SL module selects the resources for NR SL transmission from the first candidate resource set.

[0139] Furthermore, as an optional implementation, the method also includes:

[0140] (1) Obtaining target information; wherein the target information includes at least one of the following:

[0141] First resource occupancy information is used to indicate the resources occupied by the transmission through the first physical channel structure as perceived by the first terminal.

[0142] The second resource occupancy information is used to indicate the resources occupied by the first terminal for transmission through the second physical channel structure;

[0143] The third resource occupancy information is used to indicate the resources occupied by other terminals through the second physical channel structure as perceived by the first terminal.

[0144] The absolute time of the transmission performed by the first terminal within the resource awareness window using the second physical channel structure, wherein the resource awareness window is the resource awareness window of the transmission performed by the first terminal through the first physical channel structure;

[0145] A set of resource reservation periods supported by a first resource pool or a second resource pool for transmissions made by the first terminal through the second physical channel structure;

[0146] Coordination information sent by the second terminal (inter-UE coordination);

[0147] In this step, when the target information includes at least one of the following: first resource occupancy information, second resource occupancy information, absolute time of transmission of the first terminal in the resource awareness window using the second physical channel structure, and a set of resource reservation periods supported by the first resource pool or the second resource pool for transmission of the first terminal using the second physical channel structure, the first information can be obtained by the LTE SL module of the first terminal (Type A type device) sending it to the NR SL module, that is, this information is shared information within the first terminal;

[0148] In addition, the coordination information in this step includes at least one of the following: collision coordination information indication, the number of LTE SL UEs that have collided, and resource occupancy information of each LTE SL that has collided; wherein, the resource occupancy information of each LTE SL that has collided includes: transmission priority; initial transmission absolute time; initial transmission starting subchannel; retransmission absolute time; retransmission starting subchannel; time interval between initial transmission and retransmission; number of subchannels occupied; resource reservation period of service data packets; second resource indication information for indicating retransmission resources; time-domain position of a reference point, wherein the reference point is the first resource in the first group of TRIV / FRIVs in the second resource indication information; and offset value for indicating at least one of the following: the time-domain offset of the first resource in each group of TRIV / FRIVs relative to the time-domain position of the reference point.

[0149] (2) Based on the target information, exclude resources from the third candidate resource set in the first resource pool to obtain the remaining candidate resource set.

[0150] (3) Select resources from the remaining candidate resource set.

[0151] As a specific implementation, the second resource occupancy information includes at least one of the following:

[0152] Sending priority;

[0153] Initial transmission absolute time;

[0154] Initial transmission start sub-channel;

[0155] Retransmission absolute time;

[0156] Retransmit the starting subchannel;

[0157] The time interval between the initial transmission and the retransmission;

[0158] The number of sub-channels occupied;

[0159] Resource reservation period for TB transmission;

[0160] First resource indication information, used to indicate retransmission resources;

[0161] The corresponding received power of the reference signal.

[0162] In this specific implementation, resource exclusion is performed based on the above-mentioned content included in the second resource occupancy information, which can exclude resources occupied or reserved by other devices (including other terminals and / or the LET SL module in the first terminal, etc.) to reduce the probability of resource collision.

[0163] As a more specific implementation, the first resource indication information includes at least one of the following:

[0164] The Time Resource Indicator Value (TRIV) is used to indicate the time domain position of a retransmission relative to the initial transmission.

[0165] Frequency resource indicator value (FRIV) is used to indicate the frequency domain location of retransmissions;

[0166] Business data packet resource reservation period;

[0167] The number of remaining resource reservations for the transport block TB currently being transmitted by the first terminal through the second physical channel structure.

[0168] As another specific implementation, the third resource occupancy information includes at least one of the following:

[0169] Sending priority;

[0170] Initial transmission absolute time;

[0171] Initial transmission start sub-channel;

[0172] Retransmission absolute time;

[0173] Retransmit the starting subchannel;

[0174] The time interval between the initial transmission and the retransmission;

[0175] The number of sub-channels occupied;

[0176] Resource reservation period for TB transmission;

[0177] The second resource indication information is used to indicate retransmission resources;

[0178] The temporal location of the reference point, wherein the reference point is the first resource in the first group of TRIV / FRIV in the second resource indication information;

[0179] Offset value, used to indicate the temporal offset of the first resource in each TRIV / FRIV group relative to the reference point in the temporal domain;

[0180] The corresponding received power of the reference signal.

[0181] As another, more specific implementation, the second resource indication information includes at least one of the following:

[0182] TRIV is used to indicate the time domain position of the retransmission relative to the initial transmission.

[0183] FRIV is used to indicate the frequency domain location of a retransmission;

[0184] Resource reservation period for TB transmission.

[0185] Similarly, by excluding resources based on the specific parameters included in the third resource occupancy information and the second resource indication information, resources that will be occupied by other devices or modules can be excluded, thereby avoiding the selection of resources that have been occupied by other devices or modules during resource selection and reducing the probability of resource collision.

[0186] As an optional implementation, resource exclusion is performed in the third candidate resource set of the first resource pool based on the target information, including at least one of the following:

[0187] (1) Exclude the resources occupied by the transmission using the first physical channel structure in the third candidate resource set; this step is specifically based on the first resource occupancy information to exclude resources.

[0188] (2) Exclude the resources occupied by the transmissions performed using the second physical channel structure in the third candidate resource set; This step is specifically based on the second resource occupation information and / or the third resource occupation information to exclude resources. That is, the resources occupied by the transmissions performed using the second physical channel structure include: the resources occupied by the transmissions performed by the first terminal using the second physical channel structure, and / or the resources occupied by the transmissions performed by other terminals using the second physical channel structure as perceived by the first terminal.

[0189] The following will illustrate this step with specific examples:

[0190] The NR SL module knows the LTE sidelink indication and reserved resources (such as...) in the dynamically shared subframe based on information shared by the LTE sidelink module within the device (information in the target information excluding the first resource occupancy information and the coordination information sent by the second terminal). Figure 4 The time-frequency information of LTE sidelink data packet transmission resources in the perception window is shown. When performing resource exclusion: the NR sidelink module should exclude resources periodically reserved by LTE sidelink in the resource selection window based on information shared by the LTE sidelink modules within the device.

[0191] (3) During the absolute time of the transmission performed by the first terminal in the resource sensing window using the second physical channel structure, the resources corresponding to the unlistened time slots are excluded based on the configurable resource reservation period of the transmission performed in the first physical channel structure and / or the configurable resource reservation period of the transmission performed in the second physical channel structure.

[0192] (4) Based on the coordination information, exclude resources that collide with the resources transmitted by the second device in the second physical channel structure.

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

[0194] Resource reselection shall be performed if at least one of the following conditions is met:

[0195] (1) Based on the second resource occupancy information and / or the third resource occupancy information, it is determined that there is overlap with the resources used for transmission in the second physical channel structure;

[0196] The following will illustrate this step with specific examples:

[0197] like Figure 5 As shown, a resource collision occurred between the transmission resources of the NR sidelink module (NR SL module) and the LTE sidelink retransmission. The NR sidelink module discovered this resource collision through the shared information of the LTE sidelink module within the device (the second resource occupancy information and / or the third resource occupancy information in the target information). Before the next TB transmission, the NR sidelink module performed resource reselection.

[0198] (2) The coordination information indicates the execution of resource reselection;

[0199] like Figure 6 As shown, two of the three transmission resources of the NR sidelink module collided with the LTE sidelink initial transmission and retransmission. The other Type A NR sidelink module (the NR SL module of the second terminal) discovered the collision between the LTE sidelink and NR sidelink resources based on the NR sidelink PSCCH decoding and the shared information of the LTE sidelink module within the device, and sent inter-UE coordination information to notify the Type A NR sidelink module of the collision information. Before the next TB transmission, the Type A NR sidelink module performed resource reselection.

[0200] (3) Determine the need to perform resource reselection based on the coordination information; for example, this step may specifically be that when the coordination information includes the number of LTE SL UEs that have collided and / or the resource occupancy information of each LTE SL that has collided, the first terminal determines that resource reselection needs to be performed.

[0201] It should also be noted that this optional implementation can also perform resource reselection based on the existing NR SL resource reselection mechanism.

[0202] As a specific implementation method, resource reselection includes any one of the following:

[0203] (1) Reselect the resources that collided;

[0204] like Figure 7 As shown, two of the three transmission resources of the NR sidelink module collided with the LTE sidelink initial transmission and retransmission. When reselecting resources, only the two resources that collided were reselected.

[0205] (2) Perform resource reselection on all resources.

[0206] like Figure 8 As shown, two of the three transmission resources of the NR sidelink module collided with the LTE sidelink initial transmission and retransmission. When resource reselection was performed, all three transmission resources were reselected.

[0207] The direct link resource selection method in this application embodiment restricts the NR SL of the first terminal in the first resource pool (so that the reservation period of NR SL, after being converted into logical time slots, must match the RSSI measurement period of LTE SL, so that the resources occupied by NR SL within the perception window can be measured when LTE SL RSSI is measured). This allows LTE SL to prioritize the resources indicated and reserved by NR SL as low as possible, or even not use them, when using RSSI sorting during resource exclusion, in order to avoid resource collisions. In addition, resource selection is implemented in different ways for dual-mode devices that support coexistence to transmit NR SL services, ultimately achieving dynamic coexistence with different physical channel structures transmitting on shared resources.

[0208] like Figure 9 As shown in the illustration, this application also provides a direct link resource selection device, applied to a first terminal, the device comprising:

[0209] Execution module 901 is configured to, during service transmission, have the first terminal execute at least one of the following:

[0210] When the first condition is met, the first terminal performs service transmission in the first resource pool through the first physical channel structure.

[0211] The first terminal transmits services in the first resource pool or the second resource pool through the second physical channel structure;

[0212] The first physical channel structure is different from the second physical channel structure, and the second resource pool includes the resources in the first resource pool.

[0213] Optionally, the first condition includes at least one of the following:

[0214] The first terminal uses a periodic resource reservation method for transmission;

[0215] The period of the periodic resources reserved by the first terminal is included in the set of resource reservation periods configured for the first resource pool;

[0216] The subcarrier spacing is the same for the first physical channel structure and the second physical channel structure;

[0217] The resource reassessment function is disabled in the first resource pool that uses the first physical channel for transmission.

[0218] The resource preemption function is disabled in the first resource pool that uses the first physical channel for transmission.

[0219] The ratio of the period of the received signal strength index (RSSI) measurement transmitted using the second physical channel structure to a first value related to the period of the periodic resource reserved by the first terminal is an integer.

[0220] The product of the first value and the number of resource reservations made by the first terminal for service transmission through the first physical channel structure is greater than or equal to the length of the resource selection window, wherein the resource selection window is a window used by the first terminal for resource selection through transmission through the second physical channel structure.

[0221] The number of candidate resources for the first terminal to transmit services through the first physical channel structure in the first resource pool is greater than or equal to the number of transmissions of the current transport block TB transmitted through the first physical channel structure.

[0222] Optionally, the first value is obtained by the ratio of the logical time slot period of the periodic resource reserved by the first terminal to the second value; the logical time slot period of the periodic resource reserved by the first terminal is obtained by converting the period of the periodic resource reserved by the first terminal, and the second value is the ratio of the number of bits configured as the third value to the length of the bitmap in the bitmap of the first resource pool.

[0223] Furthermore, the device also includes:

[0224] The first acquisition module is used to acquire first information related to service transmission through the first physical channel structure;

[0225] The first selection module is used to select resources based on the first information to obtain resources for service transmission through the first physical channel structure.

[0226] Optionally, the first information includes at least one of the following:

[0227] Prioritizing service transmission through the first physical channel structure;

[0228] The latency requirement for service transmission through the first physical channel structure;

[0229] The number of sub-channels used for service transmission through the first physical channel structure;

[0230] The number of times the service is transmitted in the current TB through the first physical channel structure;

[0231] Resource selection window information for service transmission through the first physical channel structure;

[0232] Bitmap information of the first resource pool.

[0233] Optionally, the first selection module includes:

[0234] The first acquisition submodule is used to execute a resource selection process for service transmission through the second physical channel structure based on the first information, and obtain a first candidate resource set;

[0235] The first selection submodule is used to select, from the first candidate resource set, resources that will be used for service transmission through the first physical channel structure.

[0236] Optionally, the first selection module includes:

[0237] The second acquisition submodule is used to perform a resource selection process for service transmission through the second physical channel structure based on the first information, and obtain a first candidate resource set;

[0238] The third acquisition submodule is used to execute the resource selection process for service transmission through the first physical channel structure and obtain the second candidate resource set;

[0239] The second selection submodule is used to select resources for service transmission through the first physical channel structure from the shared resources if the number of resources shared by the first candidate resource set and the second candidate resource set is greater than or equal to the number of transmissions of the current TB through the first physical channel structure.

[0240] The third selection submodule is used to select resources from the first candidate resource set that are used for service transmission through the first physical channel structure if the number of resources shared by the first candidate resource set and the second candidate resource set is less than the number of transmissions of the current TB through the first physical channel structure.

[0241] Optionally, the device further includes:

[0242] The second acquisition module is used to acquire target information;

[0243] The resource exclusion module is used to exclude resources from the third candidate resource set in the first resource pool based on the target information to obtain the remaining candidate resource set.

[0244] The second selection module is used to select resources from the remaining candidate resource set;

[0245] The target information includes at least one of the following:

[0246] First resource occupancy information is used to indicate the resources occupied by the transmission through the first physical channel structure as perceived by the first terminal.

[0247] The second resource occupancy information is used to indicate the resources occupied by the first terminal for transmission through the second physical channel structure;

[0248] The third resource occupancy information is used to indicate the resources occupied by other terminals through the second physical channel structure as perceived by the first terminal.

[0249] The absolute time of the transmission performed by the first terminal within the resource awareness window using the second physical channel structure, wherein the resource awareness window is the resource awareness window of the transmission performed by the first terminal through the first physical channel structure;

[0250] A set of resource reservation periods supported by a first resource pool or a second resource pool for transmissions made by the first terminal through the second physical channel structure;

[0251] Coordination information sent by the second terminal.

[0252] Optionally, the second resource occupancy information includes at least one of the following:

[0253] Sending priority;

[0254] Initial transmission absolute time;

[0255] Initial transmission start sub-channel;

[0256] Retransmission absolute time;

[0257] Retransmit the starting subchannel;

[0258] The time interval between the initial transmission and the retransmission;

[0259] The number of sub-channels occupied;

[0260] Resource reservation period for TB transmission;

[0261] First resource indication information, used to indicate retransmission resources;

[0262] The corresponding received power of the reference signal.

[0263] Optionally, the first resource indication information includes at least one of the following:

[0264] The time domain resource indicator value TRIV is used to indicate the time domain position of the retransmission relative to the initial transmission.

[0265] The Frequency Domain Resource Indicator (FRIV) value is used to indicate the frequency domain location of retransmissions.

[0266] Business data packet resource reservation period;

[0267] The number of remaining resource reservations for the transport block TB currently being transmitted by the first terminal through the second physical channel structure.

[0268] Optionally, the third resource occupancy information includes at least one of the following:

[0269] Sending priority;

[0270] Initial transmission absolute time;

[0271] Initial transmission start sub-channel;

[0272] Retransmission absolute time;

[0273] Retransmit the starting subchannel;

[0274] The time interval between the initial transmission and the retransmission;

[0275] The number of sub-channels occupied;

[0276] Resource reservation period for TB transmission;

[0277] The second resource indication information is used to indicate retransmission resources;

[0278] The temporal location of the reference point, wherein the reference point is the first resource in the first group of TRIV / FRIV in the second resource indication information;

[0279] Offset value, used to indicate the temporal offset of the first resource in each TRIV / FRIV group relative to the reference point in the temporal domain;

[0280] The corresponding received power of the reference signal.

[0281] Optionally, the second resource indication information includes at least one of the following:

[0282] TRIV is used to indicate the time domain position of the retransmission relative to the initial transmission.

[0283] FRIV is used to indicate the frequency domain location of a retransmission;

[0284] Resource reservation period for TB transmission.

[0285] Optionally, the resource exclusion module is specifically used to perform at least one of the following:

[0286] Exclude resources occupied by transmissions using the first physical channel structure from the third candidate resource set;

[0287] Exclude resources occupied by transmissions using the second physical channel structure from the third candidate resource set;

[0288] Based on the absolute time of the transmission performed by the first terminal within the resource awareness window using the second physical channel structure, and / or the configurable resource reservation period of the transmission performed using the first physical channel structure, resources corresponding to unlistened time slots are excluded.

[0289] Based on the coordination information, resources that collide with the transmissions made by the second terminal using the second physical channel structure are excluded.

[0290] Optionally, the device further includes:

[0291] The resource reselection module is used to perform resource reselection when at least one of the following conditions is met:

[0292] Based on the second resource occupancy information and / or the third resource occupancy information, it is determined that there is overlap with the resources used for transmission in the second physical channel structure;

[0293] The coordination information indicates the need to reselect resources.

[0294] The execution resource reselection is determined based on the coordination information.

[0295] Optionally, when performing resource reselection, the resource reselection module is specifically used to perform any of the following:

[0296] Perform a reselection for the resources involved in the collision;

[0297] Perform resource reselection on all resources.

[0298] It should be noted that the direct link resource selection device provided in this application embodiment can implement all the method steps implemented by the direct link resource selection method embodiment executed by the first terminal, and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0299] like Figure 10 As shown, this application embodiment also provides a terminal, including a transceiver 1010, a memory 1020, a processor 1000, and a computer program stored in the memory 1020 and running on the processor 1000. When the processor 1000 executes the computer program, it implements the various processes of the direct link resource selection method embodiment described above, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0300] The transceiver 1010 is used to receive and send data under the control of the processor 1000.

[0301] Among them, Figure 10 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 1000 and memory represented by memory 1020 together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 1010 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium. For different user equipment, the user interface 1030 can also be an interface capable of connecting external or internal devices, including but not limited to keypads, displays, speakers, microphones, joysticks, etc.

[0302] The processor 1000 is responsible for managing the bus architecture and general processing, while the memory 1020 can store the data used by the processor 1000 when performing operations.

[0303] In addition, this application embodiment also provides a computer-readable storage medium storing a program. When executed by a processor, this program implements the various processes of the pass-through link resource selection method embodiment described above, and achieves the same technical effect. To avoid repetition, it will not be described again here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0304] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principles described in this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for selecting direct link resources, characterized in that, Applied to a first terminal, the method includes: During service transmission, the first terminal performs at least one of the following: When the first condition is met, the first terminal performs service transmission in the first resource pool through the first physical channel structure. The first terminal transmits services in the first resource pool or the second resource pool through the second physical channel structure; Wherein, the first physical channel structure is different from the second physical channel structure, and the second resource pool includes the resources in the first resource pool; The first condition includes at least the following: the ratio of the period of the Received Signal Strength Indication (RSSI) measurement transmitted using the second physical channel structure to the period of the periodic resource reserved by the first terminal is an integer; the first value is obtained based on the ratio of the logical time slot period of the periodic resource reserved by the first terminal to a second value; the logical time slot period of the periodic resource reserved by the first terminal is obtained by converting the period of the periodic resource reserved by the first terminal; and the second value is the ratio of the number of bits configured as the third value to the length of the bitmap in the bitmap configuring the first resource pool.

2. The method according to claim 1, characterized in that, The first condition also includes at least one of the following: The first terminal uses a periodic resource reservation method for transmission; The period of the periodic resources reserved by the first terminal is included in the set of resource reservation periods configured for the first resource pool; The subcarrier spacing is the same for the first physical channel structure and the second physical channel structure; The resource reassessment function is disabled in the first resource pool that uses the first physical channel for transmission. The resource preemption function is disabled in the first resource pool that uses the first physical channel for transmission. The product of the first value and the number of resource reservations made by the first terminal for service transmission through the first physical channel structure is greater than or equal to the length of the resource selection window, wherein the resource selection window is a window used by the first terminal for resource selection through transmission through the second physical channel structure. The number of candidate resources for the first terminal to transmit services through the first physical channel structure in the first resource pool is greater than or equal to the number of transmissions of the current transport block TB transmitted through the first physical channel structure.

3. The method according to claim 1, characterized in that, The method further includes: Acquire first information related to service transmission through the first physical channel structure; Based on the first information, resource selection is performed to obtain resources for service transmission through the first physical channel structure.

4. The method according to claim 3, characterized in that, The first information includes at least one of the following: Prioritizing service transmission through the first physical channel structure; The latency requirement for service transmission through the first physical channel structure; The number of sub-channels used for service transmission through the first physical channel structure; The number of times the service is transmitted in the current TB through the first physical channel structure; Resource selection window information for service transmission through the first physical channel structure; Bitmap information of the first resource pool.

5. The method according to claim 3, characterized in that, Based on the first information, resource selection is performed to obtain resources for service transmission through the first physical channel structure, including: Based on the first information, a resource selection process for service transmission through the second physical channel structure is executed to obtain a first candidate resource set; From the first set of candidate resources, resources that are used for service transmission through the first physical channel structure are selected.

6. The method according to claim 3, characterized in that, Based on the first information, resource selection is performed to obtain resources for service transmission through the first physical channel structure, including: Based on the first information, a resource selection process for service transmission through the second physical channel structure is executed to obtain a first candidate resource set; The resource selection process for service transmission through the first physical channel structure is executed to obtain a second candidate resource set; If the number of shared resources between the first candidate resource set and the second candidate resource set is greater than or equal to the number of transmissions of the current TB through the first physical channel structure, then the resource for service transmission through the first physical channel structure is selected from the shared resources. If the number of resources shared by the first candidate resource set and the second candidate resource set is less than the number of transmissions of the current TB through the first physical channel structure, then resources for service transmission through the first physical channel structure are selected from the first candidate resource set.

7. The method according to claim 1, characterized in that, The method further includes: Obtain target information; Based on the target information, resources are excluded from the third candidate resource set in the first resource pool to obtain the remaining candidate resource set; Select resources from the remaining candidate resource set; The target information includes at least one of the following: First resource occupancy information is used to indicate the resources occupied by the transmission through the first physical channel structure as perceived by the first terminal. The second resource occupancy information is used to indicate the resources occupied by the first terminal for transmission through the second physical channel structure; The third resource occupancy information is used to indicate the resources occupied by other terminals through the second physical channel structure as perceived by the first terminal. The absolute time of the transmission performed by the first terminal within the resource awareness window using the second physical channel structure, wherein the resource awareness window is the resource awareness window of the transmission performed by the first terminal through the first physical channel structure; A set of resource reservation periods supported by a first resource pool or a second resource pool for transmissions made by the first terminal through the second physical channel structure; Coordination information sent by the second terminal.

8. The method according to claim 7, characterized in that, The second resource usage information includes at least one of the following: Sending priority; Initial transmission absolute time; Initial transmission start sub-channel; Retransmission absolute time; Retransmit the starting subchannel; The time interval between the initial transmission and the retransmission; The number of sub-channels occupied; Resource reservation period for TB transmission; First resource indication information, used to indicate retransmission resources; The corresponding received power of the reference signal.

9. The method according to claim 8, characterized in that, The first resource indication information includes at least one of the following: The time domain resource indicator value TRIV is used to indicate the time domain position of the retransmission relative to the initial transmission. The Frequency Domain Resource Indicator (FRIV) value is used to indicate the frequency domain location of retransmissions. Business data packet resource reservation period; The number of remaining resource reservations for the transport block TB currently being transmitted by the first terminal through the second physical channel structure.

10. The method according to claim 7, characterized in that, The third resource occupancy information includes at least one of the following: Sending priority; Initial transmission absolute time; Initial transmission start sub-channel; Retransmission absolute time; Retransmit the starting subchannel; The time interval between the initial transmission and the retransmission; The number of sub-channels occupied; Resource reservation period for TB transmission; The second resource indication information is used to indicate retransmission resources; The temporal location of the reference point, wherein the reference point is the first resource in the first group of TRIV / FRIV in the second resource indication information; Offset value, used to indicate the temporal offset of the first resource in each TRIV / FRIV group relative to the reference point in the temporal domain; The corresponding received power of the reference signal.

11. The method according to claim 10, characterized in that, The second resource indication information includes at least one of the following: TRIV is used to indicate the time domain position of the retransmission relative to the initial transmission. FRIV is used to indicate the frequency domain location of a retransmission; Resource reservation period for TB transmission.

12. The method according to claim 7, characterized in that, Based on the target information, resource exclusion is performed in the third candidate resource set of the first resource pool, including at least one of the following: Exclude resources occupied by transmissions using the first physical channel structure from the third candidate resource set; Exclude resources occupied by transmissions using the second physical channel structure from the third candidate resource set; Based on the absolute time of the transmission performed by the first terminal within the resource awareness window using the second physical channel structure, and / or the configurable resource reservation period of the transmission performed using the first physical channel structure, resources corresponding to unlistened time slots are excluded. Based on the coordination information, resources that collide with the resources transmitted by the second terminal using the second physical channel structure are excluded.

13. The method according to claim 7, characterized in that, The method further includes: Resource reselection shall be performed if at least one of the following conditions is met: Based on the second resource occupancy information and / or the third resource occupancy information, it is determined that there is overlap with the resources used for transmission in the second physical channel structure; The coordination information indicates the need to reselect resources. The execution resource reselection is determined based on the coordination information.

14. The method according to claim 13, characterized in that, Perform resource reselection, including any of the following: Perform a reselection for the resources involved in the collision; Perform resource reselection on all resources.

15. A direct link resource selection device, characterized in that, Applied to a first terminal, the device includes: The execution module is configured to, during service transmission, have the first terminal perform at least one of the following: When the first condition is met, the first terminal performs service transmission in the first resource pool through the first physical channel structure. The first terminal transmits services in the first resource pool or the second resource pool through the second physical channel structure; Wherein, the first physical channel structure is different from the second physical channel structure, and the second resource pool includes the resources in the first resource pool; The first condition includes at least the following: the ratio of the period of the Received Signal Strength Indication (RSSI) measurement transmitted using the second physical channel structure to the period of the periodic resource reserved by the first terminal is an integer; the first value is obtained based on the ratio of the logical time slot period of the periodic resource reserved by the first terminal to a second value; the logical time slot period of the periodic resource reserved by the first terminal is obtained by converting the period of the periodic resource reserved by the first terminal; and the second value is the ratio of the number of bits configured as the third value to the length of the bitmap in the bitmap configuring the first resource pool.

16. A terminal, comprising a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the pass-through link resource selection method as described in any one of claims 1 to 14.

17. A readable storage medium having a program or instructions stored thereon, characterized in that, When the program or instructions are executed by the processor, they implement the pass-through link resource selection method as described in any one of claims 1 to 14.

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