Resource instruction method and communication device

Abstract

This application discloses a resource indication method and a communication device for enabling a first communication device to flexibly reserve positioning reference signal resources and realize sidelink positioning between the first communication device and a second communication device. The method includes: the first communication device determines sidelink control information (SCI), the SCI indicating M positioning reference signal resources, the M positioning reference signal resources corresponding to N time units, each time unit corresponding to at least one positioning reference signal resource, where M and N are both integers greater than or equal to 1, and the N time units include P preconfigured positioning reference signal resources, or a resource pool in which the N time units are located includes the P preconfigured positioning reference signal resources, and the M positioning reference signal resources are some or all of the P preconfigured positioning reference signal resources, where P is an integer greater than or equal to 1. The first communication device then transmits the SCI to the second communication device.

Description

[Technical Field]

[0001] [ [Technical Field] This application relates to the field of communication technology, and more particularly to resource instruction methods and communication devices. [Background technology]

[0002] Side link (S L) In a communication system, communication transmission may be performed between terminal devices by using sidelinks. To achieve sidelink positioning between terminal devices, positioning reference signals may be transmitted between different terminal devices.

[0003] Currently, the minimum scheduling resource in a sidelink communication system is a subchannel. Specifically, a segment of the spectrum within a single slot (including one or more subchannels) can be allocated to only one user. Therefore, a terminal device can reserve one subchannel or several subchannels and transmit positioning reference signals by using the reserved subchannels. The above technical solution shows a lack of flexibility in resource reservation by the terminal device. [Overview of the project]

[0004] This application provides a resource instruction method and communication device for enabling a first communication device to flexibly reserve positioning reference signal resources, thereby realizing side-link positioning between a first communication device and a second communication device.

[0005] A first aspect of this application provides a resource instruction method including the following:

[0006] The first communication device provides side link control information (SThe first communication device determines the SCI, which is used to indicate or reserve M positioning reference signal resources, where M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers greater than or equal to 1, where N time units contain P pre-configured positioning reference signal resources, or where the resource pool in which N time units are located contains P pre-configured positioning reference signal resources, where M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer greater than or equal to 1, and transmits the SCI to the second communication device.

[0007] In the above technical solution, the first communication device may pre-select M positioning reference signal resources from P pre-configured positioning reference signal resources and instruct or reserve M positioning reference signal resources for the second communication device based on SCI. The granularity of resource reservations performed by the terminal device is reference signal resources, and P pre-configured Positioning It can be seen that the reference signal resources may be flexibly configured in a pre-configured manner. This helps to improve the flexibility of reserving positioning reference signal resources by the first communication device and to reduce the complexity of reserving positioning reference signal resources by the first communication device. The second communication device may decide, based on SCI, that the first communication device transmits positioning reference signals on M positioning reference signal resources corresponding to N time units. In this way, the second communication device receives the positioning reference signals transmitted by the first communication device on M positioning reference signal resources corresponding to N time units, thereby realizing sidelink positioning between the first and second communication devices.

[0008] A second aspect of this application provides a resource instruction method, which includes the following:

[0009] The second communication device receives an SCI from the first communication device, which is used to indicate or reserve M positioning reference signal resources, where M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers greater than or equal to 1, where N time units contain P pre-configured positioning reference signal resources, or where the resource pool in which N time units are located contains P pre-configured positioning reference signal resources, where M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer greater than or equal to 1, and the second communication device receives a positioning reference signal from the first communication device based on the SCI.

[0010] In the above technical solution, the second communication device receives an SCI from the first communication device, which indicates or reserves M positioning reference signal resources. In this case, the second communication device may receive, based on the SCI, that the first communication device receives a positioning reference signal on M positioning reference signal resources corresponding to N time units. In this way, side-link positioning between the first and second communication devices is achieved. Furthermore, the granularity of resource reservations performed by the terminal device is the reference signal resources, and P pre-configured resources. Positioning The reference signal resource may be flexibly configured in a pre-configured manner. This helps to improve the flexibility of resource reservation by the first communication device and reduce the complexity of resource reservation by the first communication device.

[0011] In possible implementations based on the first or second embodiment, M is greater than or equal to N and P is greater than or equal to M.

[0012] In possible implementations based on the first or second embodiment, the first communication device is a first terminal device and the second communication device is a second terminal device, or the first communication device is a terminal device and the second communication device is a roadside unit (REither the first communication device is an RSU and the second communication device is a terminal device.

[0013] In possible implementations based on the first or second embodiment, the SCI is for further indicating or reserving N time units.

[0014] In this implementation, the SCI may further specify or reserve N time units. This helps improve the efficiency of reserving positioning reference signal resources by the first communication device.

[0015] In a possible implementation based on the first or second embodiment, the SCI includes a first field, the first field is for indicating or reserving M positioning reference signal resources.

[0016] In this implementation, the first communication device may indicate or reserve M positioning reference signal resources based on a first field in the SCI, thereby allowing the second communication device to determine the M positioning reference signal resources. For example, the first field is for indicating or reserving the index or identifier of the M positioning reference signal resources.

[0017] In a possible implementation based on the first or second embodiment, the length of the first field is determined based on the maximum number of time units that can be indicated or reserved by the SCI or the maximum number of positioning reference signal resources that can be indicated or reserved by the SCI.

[0018] This implementation describes the factors to be considered when designing the length of the first field. Specifically, the length of the first field may be designed with reference to the maximum number of time units or positioning reference signal resources that can be indicated or reserved by the SCI.

[0019] In a possible implementation based on the first or second embodiment, when N time units include P pre-configured positioning reference signal resources, each time unit includes the same number of pre-configured positioning reference signal resources. The length of the first field is determined based on the maximum number of time units that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in each time unit, or The length of the first field is determined based on the maximum number of positioning reference signal resources that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in each time unit.

[0020] In this implementation, N time units contain P pre-configured positioning reference signal resources. In other words, the positioning reference signal resources are configured at the granularity of time units. Two possible implementations of the length of the first field are shown for the same number of pre-configured positioning reference signal resources contained in each time unit. Typically, each time unit contains pre-configured positioning reference signal resource The number of subchannels is less than the number of subchannels in the total bandwidth. From the considerations for designing the length of the first field, it can be seen that in the technical solution of this application, the length of the first field may be designed to be short, thereby reducing the overhead of the first communication device in directing or reserving positioning reference signal resources.

[0021] In a possible implementation based on the first or second embodiment, when a resource pool in which N time units are located contains P pre-configured positioning reference signal resources, the N time units belong to the same resource pool. The length of the first field is determined based on the maximum number of time units that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in the resource pool, or The length of the first field is determined based on the maximum number of positioning reference signal resources that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in the resource pool.

[0022] In this implementation, a resource pool containing N time units includes P pre-configured positioning reference signal resources. In other words, the positioning reference signal resources are configured at the granularity of the resource pool. Two possible implementations of the length of the first field are shown for the same number of pre-configured positioning reference signals contained in the resource pool. Typically, the number of pre-configured positioning reference signal resources contained in the resource pool is less than the number of subchannels in the total bandwidth. From the considerations for designing the length of the first field, it can be seen that in the technical solution of this application, the length of the first field may be designed to be short, thereby reducing the overhead of directing or reserving positioning reference signal resources by the first communication device.

[0023] In possible implementations based on the first or second embodiment, the length of the first field is subject to the following conditions, namely:

number

number

number

number

number

[0024] In an implementation in which the first field indicates M positioning reference signal resources, possible implementations of the length of the first field are shown. Typically, pre-configured positioning reference signals are included in each time unit. resource The number of subchannels is less than the number of subchannels in the total bandwidth. From the conditions that the length of the first field satisfies, it can be seen that in the technical solution of this application, the length of the first field may be designed to be short, thereby reducing the overhead of the first communication device in directing or reserving positioning reference signal resources.

[0025] In possible implementations based on the first or second embodiment, the length of the first field is subject to the following conditions, namely:

number

number

number

number

number

[0026] In an implementation in which the first field indicates M positioning reference signal resources, possible implementations of the length of the first field are shown. Typically, pre-configured positioning reference signals included in a resource pool. resource The number of subchannels is less than the number of subchannels in the total bandwidth. From the conditions that the length of the first field satisfies, it can be seen that in the technical solution of this application, the length of the first field may be designed to be short, thereby reducing the overhead of the first communication device in directing or reserving positioning reference signal resources.

[0027] In possible implementations based on the first or second embodiment, the length of the first field is subject to the following conditions, namely:

number

[0028] In possible implementations based on the first or second embodiment, the length of the first field is subject to the following conditions, namely: [Number] satisfies, where N slprs represents the number of preconfigured positioning reference signal resources included in each time unit, and k reserve represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field. k0 is an integer greater than or equal to 1, and a is an integer greater than or equal to 0. In a possible implementation, a = 0 or a = 1. In other possible implementations, a = k0, a = k reserve or k1 = N slprs is satisfied.

[0029] Based on the first aspect or the second aspect, in a possible implementation, the length of the first field satisfies the following condition, that is, [Number] satisfies, where Q represents the number of preconfigured positioning reference signal resources included in the resource pool, and k reserve represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field. k0 is an integer greater than or equal to 1, and k1 is an integer greater than or equal to 0, or k1 is determined based on a system coefficient. For example, k1 = k0, k1 = k reserve or k1 = Q.

[0030] In other possible implementations, the length of the first field satisfies the following condition, that is, [Number] satisfies, where Q represents the number of preconfigured positioning reference signal resources included in the resource pool, and k reservek0 represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field, where k0 is an integer greater than or equal to 1, and a is an integer greater than or equal to 0. In possible implementations, a=0 or a=1.

[0031] In other possible realizations, a=k0, a=k reserve Alternatively, k1 = Q.

[0032] In possible implementations based on the first or second embodiment, the length of the first field is 4W bits, where W is an integer greater than or equal to 1.

[0033] In possible implementations based on the first or second embodiment, the length of the first field is 4 bits, 8 bits, or 12 bits.

[0034] In a possible implementation based on the first or second embodiment, when the SCI is intended to indicate or reserve only positioning reference signal resources within a single time unit, the length of the first field is 4 bits, When SCI is used to indicate or reserve positioning reference signal resources within two time units, the length of the first field is 8 bits, or When the SCI is used to indicate or reserve positioning reference signal resources within three time units, the length of the first field is 12 bits.

[0035] In a possible implementation based on the first or second embodiment, the length of the first field is 8 bits, the four most significant bits in the first field indicate the positioning reference signal resource in the first of two time units, and the four least significant bits in the first field indicate the positioning reference signal in the second of two time units. resource Give instructions.

[0036] In a possible implementation based on the first or second embodiment, the length of the first field is 8 bits, the four least significant bits in the first field indicate a positioning reference signal resource in the first of two time units, and the four most significant bits in the first field indicate a positioning reference signal resource in the second of two time units.

[0037] In a possible implementation based on the first or second embodiment, k reserve Wireless resource control (R It is indicated by using RC signaling. For example, in a possible implementation, k reserve This is indicated by using information elements in the configuration signaling related to the sidelink resource pool within the RRC signaling. For example, k reserve This is indicated by using the MaxNumPerReserve (sl-MaxNumPerReserve) information element in the configuration signaling related to the sidelink resource pool within the RRC signaling.

[0038] In a possible implementation based on the first or second embodiment, the formula for calculating the length of the first field may indicate that the length of the first field relates to the maximum number of resources or time units that can be indicated in each sidelink control signaling transmission.

[0039] In a possible implementation based on the first or second embodiment, the formula for calculating the length of the first field is a reserved k reserve Of the maximum number of positioning reference signal resources, k reserve - It may indicate that only k0 positioning reference signal resources need to be indicated. The other k0 positioning reference signal resources are indicated in other ways. For example, the k0 positioning reference signal resources are physical sidelink control channels that carry control signaling (e.g., SCI). (PThis is indicated by using frequency-domain or time-domain location information of SCCH. Optionally, the frequency-domain location information includes the start frequency or bandwidth. The start frequency is the start resource block. (R B) Including the starting subchannel, any other frequency-related information, etc. Bandwidth is the bandwidth size, e.g., the number of RBs, the number of subchannels, or resource elements. (R This includes the number of E). Time-domain position information includes information such as slots, start symbols, subframes, and / or frames.

[0040] In a possible implementation based on the first or second embodiment, the value of the first field is given by the following condition: I1 + I2 × N slprs +…I N × (N slprs ) N-1 Or I1 + I2 × N slprs +…I N × (N slprs ) N-1 Satisfying +Y, where I1 represents the index of the positioning reference signal resource in the first of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second of the N time units indicated or reserved by the SCI, and I N is the index of the positioning reference signal resource within the Nth time unit out of N time units designated or reserved by SCI, where N slprs represents the number of pre-configured positioning reference signal resources included in each time unit, and the index of the pre-configured positioning reference signal resources included in each of the N time units is encoded from 0. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0041] In an implementation where the first field indicates M positioning reference signal resources, the possible conditions that the value of the first field must satisfy are indicated. In this way, the second communication device can determine the positioning reference signal resources reserved by the first communication device in each of the N time units based on the above conditions. This facilitates the second communication device receiving the positioning reference signal of the first communication device on the corresponding positioning reference signal resource.

[0042] In a possible implementation based on the first or second embodiment, the value of the first field is given by the following condition: I1 + I2 × N slprs +…I N × (N slprs ) N-1 -1 or I1 + I2 × N slprs +…I N × (N slprs ) N-1 -1+Y satisfies, where I1 represents the index of the positioning reference signal resource in the first of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second of the N time units indicated or reserved by the SCI, and I N is the index of the positioning reference signal resource within the Nth time unit out of N time units designated or reserved by SCI, where N slprs represents the number of pre-configured positioning reference signal resources included in each time unit, and the index of the pre-configured positioning reference signal resources included in each of the N time units is encoded from 1. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0043] In an implementation where the first field indicates M positioning reference signal resources, other possible conditions that the value of the first field satisfies are indicated. Thus, the second communication device can determine the positioning reference signal resources reserved by the first communication device in each of the N time units based on the above conditions. This facilitates the second communication device receiving the positioning reference signal of the first communication device on the corresponding positioning reference signal resource.

[0044] In a possible implementation based on the first or second embodiment, the value of the first field is given by the following conditions: I1 + I2 × Q + ...I N ×(Q) N-1 Or I1 + I2 × Q + ...I N ×(Q) N-1 Satisfying +Y, where I1 represents the index of the positioning reference signal resource in the first of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second of the N time units indicated or reserved by the SCI, and I N Q is the index of the positioning reference signal resource within the Nth time unit out of N time units indicated or reserved by SCI, Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and the indices of the pre-configured positioning reference signal resources included in the resource pool are encoded from 0. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0045] In an implementation where the first field indicates M positioning reference signal resources, other possible conditions that the value of the first field satisfies are indicated. Thus, the second communication device can determine the positioning reference signal resources reserved by the first communication device in each of the N time units based on the above conditions. This facilitates the second communication device receiving the positioning reference signal of the first communication device on the corresponding positioning reference signal resource.

[0046] In a possible implementation based on the first or second embodiment, the value of the first field is given by the following conditions: I1 + I2 × Q + ...I N ×(Q) N-1 -1 or I1 + I2 × Q + ...I N ×(Q) N-1 -1+Y satisfies, where I1 represents the index of the positioning reference signal resource in the first of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second of the N time units indicated or reserved by the SCI, and I N Q is the index of the positioning reference signal resource within the Nth time unit out of N time units indicated or reserved by SCI, Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and the indices of the pre-configured positioning reference signal resources included in the resource pool are encoded from 1. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0047] In an implementation where the first field indicates M positioning reference signal resources, other possible conditions that the value of the first field satisfies are indicated. Thus, the second communication device can determine the positioning reference signal resources reserved by the first communication device in each of the N time units based on the above conditions. This facilitates the second communication device receiving the positioning reference signal of the first communication device on the corresponding positioning reference signal resource.

[0048] In a possible implementation based on the first or second embodiment, the SCI includes a first field, which is used to indicate or reserve M positioning reference signal resources and N time units.

[0049] In this implementation, the first communication device may indicate M positioning reference signal resources and N time units by using the first field. Therefore, the second communication device determines the M positioning reference signal resources corresponding to the N time units.

[0050] In a possible implementation based on the first or second embodiment, the frequency bands occupied by different positioning reference signal resources among the P pre-configured positioning reference signal resources have overlapping portions.

[0051] In this implementation method, the frequency bands occupied by different positioning reference signal resources have overlapping portions, which helps improve resource utilization.

[0052] In a possible implementation based on the first or second embodiment, each of the P pre-configured positioning reference signal resources occupies part or all of the bandwidth of the resource pool.

[0053] In this implementation method, the first communication device instructs or reserves M positioning reference signal resources corresponding to N time units, and based on the M positioning reference signal resources corresponding to N time units, the positioning reference signal resource The system transmits the positioning reference signal. Since positioning accuracy is strongly related to signal bandwidth, the positioning reference signal resource occupies the entire bandwidth of the resource pool, thereby improving the positioning accuracy of the first communication device. Furthermore, the M positioning reference signal resources are part of the P pre-configured positioning reference signal resources, and the remaining positioning reference signal resources may be used by other users. In this way, multiple users can use positioning reference signals within a single slot. No. The bandwidth used by each user to transmit and send positioning reference signals is the bandwidth of the resource pool. In this way, resources can be reused by multiple users, thereby improving system capacity. User positioning accuracy is ensured while ensuring multi-user multiplexing.

[0054] In a possible implementation based on the first or second embodiment, when N time units include P pre-configured positioning reference signal resources, the configuration of the pre-configured positioning reference signal resources included in different time units is the same.

[0055] In this implementation method, the configuration of pre-configured positioning reference signal resources included in different time units may be the same, which simplifies the implementation of the solution and makes it easier to configure the system's positioning reference signal resources.

[0056] In a possible implementation based on the first aspect, the method further includes:

[0057] The first communication device receives downlink control information from the third communication device. (D Upon receiving the CI, the DCI instructs the first communication device to reserve M positioning reference signal resources. The third communication device may be a network device. For example, the third communication device is an access network device.

[0058] In this implementation, the third communication device may schedule the first communication device to reserve M positioning reference signal resources in order to realize sidelink positioning between the first communication device and the second communication device.

[0059] Based on the first embodiment, in a possible implementation, DCI further instructs the first communication device to reserve N time units.

[0060] In a possible implementation based on the first aspect, the method further includes:

[0061] The first communication device receives configuration information from the third communication device, and the configuration information is for configuring P pre-configured positioning reference signal resources.

[0062] In this implementation, the first communication device may receive configuration information from the third communication device and configure P positioning reference signal resources. The method in which the third communication device pre-configures the positioning reference signal resources improves the flexibility of the solution and helps reduce the complexity of reserving resources by the first communication device.

[0063] In possible implementations based on the first or second embodiment, the SCI further includes a second field for reserving N time units.

[0064] In this implementation, the first communication device may reserve N time units based on the second field, which may help improve the resource reservation efficiency of the first communication device.

[0065] In a possible implementation based on the first or second embodiment, the length of the second field is determined based on the maximum number of time units that can be indicated or reserved by the SCI or the maximum number of positioning reference signal resources that can be indicated or reserved by the SCI.

[0066] This implementation describes the factors to be considered when designing the length of the second field. Specifically, the length of the second field may be designed with reference to the maximum number of time units or positioning reference signal resources that can be indicated or reserved by the SCI.

[0067] In possible implementations based on the first or second embodiment, the length of the second field is 5 bits when N time units contain 2 slots, or 9 bits when N time units contain 3 slots.

[0068] In a possible implementation based on the first or second embodiment, when N time units include P pre-configured positioning reference signal resources, different pre-configured positioning reference signal resources included in each time unit satisfy a frequency division multiplexing relationship on the same time-domain resource. When N time units contain P pre-configured positioning reference signal resources, different pre-configured positioning reference signal resources contained in each time unit satisfy a time-division multiplexing relationship on the same frequency domain resource, or When N time units contain P pre-configured positioning reference signal resources, in each time unit, positioning reference signal resources occupying the same time domain resource satisfy a frequency division multiplexing relationship on the same time domain resource, and positioning reference signal resources occupying the same frequency domain resource satisfy a time division multiplexing relationship on the same frequency domain resource.

[0069] In this implementation, different positioning reference signal resources within each time unit satisfy frequency division multiplexing and / or time division multiplexing relationships. Multiple positioning reference signal resources included in one time unit may be used by multiple users, and as a result, multiple users may use positioning reference signals within one time unit. resource This will enable the transmission of [the signal]. Furthermore, it helps improve system capacity by eliminating small or no signal interference between different users.

[0070] A third aspect of this application provides a first communication device, A processing module configured to determine SCI, where SCI is for indicating or reserving M positioning reference signal resources, where M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers greater than or equal to 1, where N time units contain P pre-configured positioning reference signal resources, or where the resource pool in which N time units are located contains P pre-configured positioning reference signal resources, where M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer greater than or equal to 1, and a processing module, A transceiver module configured to transmit SCI to a second communication device and Includes.

[0071] A fourth aspect of this application provides a second communication device, The present invention relates to a transceiver module configured to receive an SCI from a first communication device, wherein the SCI is for indicating or reserving M positioning reference signal resources, the M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers greater than or equal to 1, the N time units contain P pre-configured positioning reference signal resources, or the resource pool in which the N time units are located contains P pre-configured positioning reference signal resources, the M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, P is an integer greater than or equal to 1, and the transceiver module is configured to receive a positioning reference signal from the first communication device based on the SCI.

[0072] In possible implementations based on the third or fourth aspect, M is greater than or equal to N and P is greater than or equal to M.

[0073] In possible implementations based on the third or fourth aspect, the first communication device is a first terminal device and the second communication device is a second terminal device, or the first communication device is a terminal device and the second communication device is an RSU, or the first communication device is an RSU and the second communication device is a terminal device.

[0074] In a possible implementation based on the third or fourth aspect, the SCI is for further indicating or reserving N time units.

[0075] In a possible implementation based on the third or fourth aspect, the SCI includes a first field, the first field is for indicating or reserving M positioning reference signal resources.

[0076] In a possible implementation based on the third or fourth aspect, the length of the first field is determined based on the maximum number of time units that can be indicated or reserved by the SCI or the maximum number of positioning reference signal resources that can be indicated or reserved by the SCI.

[0077] In a possible implementation based on the third or fourth aspect, when N time units include P pre-configured positioning reference signal resources, each time unit includes the same number of pre-configured positioning reference signal resources. The length of the first field is determined based on the maximum number of time units that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in each time unit, or The length of the first field is determined based on the maximum number of positioning reference signal resources that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in each time unit.

[0078] In a possible implementation based on the third or fourth aspect, when a resource pool in which N time units are located contains P pre-configured positioning reference signal resources, the N time units belong to the same resource pool. The length of the first field is determined based on the maximum number of time units that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in the resource pool, or The length of the first field is determined based on the maximum number of positioning reference signal resources that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in the resource pool.

[0079] In possible implementations based on the third or fourth aspect, the length of the first field is subject to the following conditions, namely:

number

number

number

number

number

[0080] In possible implementations based on the third or fourth aspect, the length of the first field is subject to the following conditions, namely:

number

number

number

number

number

[0081] In possible implementations based on the third or fourth aspect, the length of the first field is subject to the following conditions, namely:

number

[0082] In possible implementations based on the third or fourth aspect, the length of the first field is subject to the following conditions, namely:

number

[0083] In possible implementations based on the third or fourth aspect, the length of the first field is subject to the following conditions, namely:

number

[0084] In other possible implementations, the length of the first field is subject to the following conditions, namely:

number

[0085] In possible implementations based on the third or fourth aspect, the length of the first field is 4W bits, where W is an integer greater than or equal to 1.

[0086] In possible implementations based on the third or fourth aspect, the length of the first field is 4 bits, 8 bits, or 12 bits.

[0087] In a possible implementation based on the third or fourth aspect, when the SCI is intended to indicate or reserve only positioning reference signal resources within a single time unit, the length of the first field is 4 bits, When SCI is used to indicate or reserve positioning reference signal resources within two time units, the length of the first field is 8 bits, or When the SCI is used to indicate or reserve positioning reference signal resources within three time units, the length of the first field is 12 bits.

[0088] In possible implementations based on the third or fourth aspect, the length of the first field is 8 bits, the four most significant bits in the first field indicate the positioning reference signal resource in the first of two time units, and the four least significant bits in the first field indicate the positioning reference signal in the second of two time units. resource Give instructions.

[0089] In a possible implementation based on the third or fourth aspect, the length of the first field is 8 bits, the four least significant bits in the first field indicate a positioning reference signal resource in the first of two time units, and the four most significant bits in the first field indicate a positioning reference signal resource in the second of two time units.

[0090] In a possible implementation based on the third or fourth aspect, k reserve This is indicated by using RRC signaling. For example, in a possible implementation, k reserve This is indicated by using information elements in the configuration signaling related to the sidelink resource pool within the RRC signaling. For example, k reserveThis is indicated by using the MaxNumPerReserve (sl-MaxNumPerReserve) information element in the configuration signaling related to the sidelink resource pool within the RRC signaling.

[0091] In a possible implementation based on the third or fourth aspect, the formula for calculating the length of the first field may indicate that the length of the first field relates to the maximum number of resources or time units that can be indicated in each sidelink control signaling transmission.

[0092] In a possible implementation based on the third or fourth aspect, the formula for calculating the length of the first field is a reserved k reserve k of the positioning reference signal resources reserve -It may be indicated that only k0 positioning reference signal resources need to be indicated. The other k0 positioning reference signal resources are indicated in other ways. For example, the k0 positioning reference signal resources are indicated by using frequency-domain or time-domain position information of the PSCCH carrying control signaling (e.g., SCI). Optionally, the frequency-domain position information includes a start frequency or bandwidth. The start frequency is: start This includes RB, start subchannel, and any other frequency-related information. Bandwidth includes bandwidth size, e.g., the number of RBs, the number of subchannels, or the number of REs. Time-domain position information includes information such as slots, start symbols, subframes, and / or frames.

[0093] In a possible implementation based on the third or fourth aspect, the value of the first field is given by the following condition: I1 + I2 × N slprs +…I N × (N slprs ) N-1 Or I1 + I2 × N slprs +…I N × (N slprs ) N-1satisfies +Y, where I1 represents the index of the positioning reference signal resource within the first time unit among the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource within the second time unit among the N time units indicated or reserved by the SCI, I N is the index of the positioning reference signal resource within the Nth time unit among the N time units indicated or reserved by the SCI, and N slprs represents the number of pre-configured positioning reference signal resources included in each time unit, and the indices of the pre-configured positioning reference signal resources included in each of the N time units are encoded from 0. Y is a constant, and Y is predefined or obtained through calculation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y is an integer and Y may be equal to -1, -2, -3, 0, 1, 2, 3, etc.

[0094] Based on the third or fourth aspect, in a possible implementation, the value of the first field satisfies the following condition, namely, I1 + I2 × N slprs + … I N × (N slprs ) N-1 - 1 or I1 + I2 × N slprs + … I N × (N slprs ) N-1 - 1 + Y, where I1 represents the index of the positioning reference signal resource within the first time unit among the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource within the second time unit among the N time units indicated or reserved by the SCI, I N is the index of the positioning reference signal resource within the Nth time unit among the N time units indicated or reserved by the SCI, and N slprsrepresents the number of preconfigured positioning reference signal resources included in each time unit, and the indexes of the preconfigured positioning reference signal resources included in each of the N time units are encoded from 1. Y is a constant, and Y is predefined or obtained through calculation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y is an integer, and Y may be equal to -1, -2, -3, 0, 1, 2, 3, etc.

[0095] Based on the third aspect or the fourth aspect, in a possible implementation manner, the value of the first field is the following condition, that is, I1 + I2×Q + … I N ×(Q) N-1 or I1 + I2×Q + … I N ×(Q) N-1 + Y is satisfied, where I1 represents the index of the positioning reference signal resource within the first time unit among the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource within the second time unit among the N time units indicated or reserved by the SCI, I N is the index of the positioning reference signal resource within the Nth time unit among the N time units indicated or reserved by the SCI, Q represents the number of preconfigured positioning reference signal resources included in the resource pool, and the indexes of the preconfigured positioning reference signal resources included in the resource pool are encoded from 0. Y is a constant, and Y is predefined or obtained through calculation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y is an integer, and Y may be equal to -1, -2, -3, 0, 1, 2, 3, etc.

[0096] Based on the third aspect or the fourth aspect, in a possible implementation manner, the value of the first field is the following condition, that is, I1 + I2×Q + … I N ×(Q) N-1 -1 or I1 + I2×Q + … I N ×(Q) N-1-1+Y satisfies, where I1 represents the index of the positioning reference signal resource in the first of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second of the N time units indicated or reserved by the SCI, and I N Q is the index of the positioning reference signal resource within the Nth time unit out of N time units indicated or reserved by SCI, Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and the indices of the pre-configured positioning reference signal resources included in the resource pool are encoded from 1. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0097] In a possible implementation based on the third or fourth aspect, the SCI includes a first field which is for indicating or reserving M positioning reference signal resources and N time units.

[0098] In a possible implementation based on the third or fourth embodiment, the frequency bands occupied by different positioning reference signal resources among the P pre-configured positioning reference signal resources have overlapping portions.

[0099] In a possible implementation based on the third or fourth aspect, each of the P pre-configured positioning reference signal resources occupies part or all of the bandwidth of the resource pool.

[0100] In a possible implementation based on the third or fourth aspect, when N time units include P pre-configured positioning reference signal resources, the configuration of the pre-configured positioning reference signal resources included in different time units is the same.

[0101] Based on the third aspect, in possible implementations, the transceiver module is The third communication device is further configured to receive DCI, which instructs the first communication device to reserve M positioning reference signal resources.

[0102] In a possible implementation based on the third aspect, DCI further instructs the first communication device to reserve N time units.

[0103] Based on the third aspect, in possible implementations, the transceiver module is It is further configured to receive configuration information from a third communication device, and the configuration information is for configuring P pre-configured positioning reference signal resources.

[0104] In a possible implementation based on the third or fourth aspect, the SCI further includes a second field for reserving N time units.

[0105] In a possible implementation based on the third or fourth aspect, the length of the second field is determined based on the maximum number of time units that can be indicated or reserved by the SCI or the maximum number of positioning reference signal resources that can be indicated or reserved by the SCI.

[0106] In possible implementations based on the third or fourth aspect, when N time units contain two slots, the length of the second field is 5 bits, or when N time units contain three slots, the length of the second field is 9 bits.

[0107] In a possible implementation based on the third or fourth aspect, when N time units include P pre-configured positioning reference signal resources, different pre-configured positioning reference signal resources included in each time unit satisfy a frequency division multiplexing relationship on the same time-domain resource. When N time units contain P pre-configured positioning reference signal resources, different pre-configured positioning reference signal resources contained in each time unit satisfy a time-division multiplexing relationship on the same frequency domain resource, or When N time units contain P pre-configured positioning reference signal resources, in each time unit, positioning reference signal resources occupying the same time domain resource satisfy a frequency division multiplexing relationship on the same time domain resource, and positioning reference signal resources occupying the same frequency domain resource satisfy a time division multiplexing relationship on the same frequency domain resource.

[0108] A fifth aspect of this application provides a communication device, the communication device including a processor, the processor being configured to call and execute computer programs stored in memory, so that the processor implements either of the implementations of the first or second aspect.

[0109] Optionally, the communication device further includes a transceiver. The processor is further configured to control the transceiver to receive and transmit signals.

[0110] Optionally, the communication device includes memory. Memory stores computer programs.

[0111] A sixth aspect of this application provides a computer program product including instructions. When the computer program product is executed on a computer, the computer is able to execute an implementation of either the first or second aspect.

[0112] A seventh aspect of this application provides a computer-readable storage medium containing computer instructions. When the computer instructions are executed on a computer, the computer is able to execute an implementation of either the first or second aspect.

[0113] An eighth aspect of this application provides a chip device including a processor, which is connected to a memory and configured to call a program stored in the memory, thereby enabling the processor to execute an implementation of either the first or second aspect.

[0114] A ninth aspect of this application provides a communication system, which includes a first communication device according to a third aspect and a second communication device according to a fourth aspect.

[0115] According to the technical solution described above, the embodiments of this application have the following advantages.

[0116] In the above technical solution, the first communication device determines an SCI, which is used to indicate or reserve M positioning reference signal resources, where M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers greater than or equal to 1. The N time units contain P pre-configured positioning reference signal resources, or the resource pool in which the N time units are located contains P pre-configured positioning reference signal resources. The M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, where P is an integer greater than or equal to 1. The first communication device then transmits the SCI to the second communication device. It can be seen that the first communication device may pre-select M positioning reference signal resources from the P pre-configured positioning reference signal resources and indicate or reserve M positioning reference signal resources for the second communication device based on the SCI. The granularity of resource reservations performed by the terminal device is the reference signal resources, and P pre-configured PositioningIt can be understood that the reference signal resource may be flexibly configured in a pre-configuration manner. This helps to improve the flexibility of reserving the positioning reference signal resource by the first communication device and reduce the complexity of reserving the positioning reference signal resource by the first communication device. The second communication device may determine, based on the SCI, that the first communication device transmits a positioning reference signal on M positioning reference signal resources within N time units. In this way, the second communication device receives the positioning reference signal transmitted by the first communication device on the corresponding time-frequency resource, thereby realizing side-link positioning between the first communication device and the second communication device.

Brief Description of the Drawings

[0117] [Figure 1] It is the first diagram of the communication system to which the embodiments of this application are applied. [Figure 2] It is the second diagram of the communication system to which the embodiments of this application are applied. [Figure 3] It is the third diagram of the communication system to which the embodiments of this application are applied. [Figure 4] It is the fourth diagram of the communication system to which the embodiments of this application are applied. [Figure 5] It is a diagram of the coaming size according to the embodiments of this application. [Figure 6] It is a diagram of an embodiment of the resource indication method according to the embodiments of this application. [Figure 7] It is a diagram of indicating the positioning reference signal resource by the SCI according to the embodiments of this application. [Figure 8] It is the first diagram of the positioning reference signal resource according to the embodiments of this application. [Figure 9] It is the second diagram of the positioning reference signal resource according to the embodiments of this application. [Figure 10] It is the third diagram of the positioning reference signal resource according to the embodiments of this application. [Figure 11] It is a diagram of the first field and the second field included in the SCI according to the embodiments of this application. [Figure 12] This figure shows a resource pool to which time-frequency resources used by a first communication device to transmit SCI belong, and a resource pool to which M positioning reference signal resources corresponding to N time units belong, according to an embodiment of this application. [Figure 13] This is a diagram showing the structure of a first communication device according to an embodiment of this application. [Figure 14] This is a diagram showing the structure of a second communication device according to an embodiment of this application. [Figure 15] This is a diagram showing the structure of a terminal device according to an embodiment of this application. [Figure 16] This is a diagram showing the structure of a communication device according to an embodiment of this application. [Modes for carrying out the invention]

[0118] Embodiments of this application provide a resource instruction method and a communication device that enable a first communication device to flexibly reserve positioning reference signal resources and to realize sidelink positioning between the first communication device and a second communication device.

[0119] The technical solutions in the embodiments of this application are described below with reference to the accompanying drawings. Certainly It is clear that the embodiments described herein are only a part of, and not the entirety of, the embodiments of this application. All other embodiments that can be obtained by those skilled in the art based on the embodiments of this application without creative effort shall fall within the scope of protection of this application.

[0120] References to “embodiments,” “some embodiments,” etc., in this application indicate that one or more embodiments of this application include certain features, structures, or characteristics described by reference to an embodiment. Therefore, phrases such as “in some embodiments,” “in some other embodiments,” and “in other embodiments,” appearing in different parts of this specification, do not necessarily refer to the same embodiment. Rather, unless otherwise specifically emphasized, they mean “one or more of the embodiments, but not all of them.” All terms “including,” “having,” and variations thereof, unless otherwise specifically emphasized, mean “including, but not limited to,” them.

[0121] In this description of the application, unless otherwise specified, " / " means "or". For example, A / B may mean A or B. In this specification, the term "and / or" describes only the relationship between related objects and indicates that there may be three relationships. For example, A and / or B may represent the following three cases: that only A exists, that both A and B exist, and that only B exists. Furthermore, "at least one" means one or more, and "plural" means two or more. At least one of the following items or similar expressions thereof indicates any combination of these items, including either a single item or a combination of multiple items. For example, at least one of a, b, or c may represent a, b, c, a and b, a and c, b and c, or a, b and c. a, b and c may be singular or plural.

[0122] The technical solutions of this application are sidelink communication systems and device-to-device communication systems. (D 2D) May be applied to communication systems. For example, a sidelink communication system may include an Internet of Things system. Specifically, the system may be a vehicle-to-anything system such as a public safety system, a smart city system, a transport safety system, an industrial control system, an autonomous driving system, and an industrial robot system.(V It may also be a 2X) system, an Internet of Industrial Things system, a smart home system, etc.

[0123] Hereinafter, referring to FIGS. 1 to 4, some scenarios to which this application is applicable will be described.

[0124] FIG. 1 is a diagram of the structure of a communication system according to an embodiment of this application. Refer to FIG. 1. The communication system includes a terminal device 101, a terminal device 102, an access network device 103, an access and mobility management function (A MF) 104 and a positioning management function (L MF) 105.

[0125] Optionally, the terminal device 101 and the terminal device 102 may be connected through an interface. The access network device 103 may be connected to the AMF 104 through an interface, and the AMF 104 may be connected to the LMF 105 through an interface.

[0126] For example, the terminal device 101 and the terminal device 102 may be connected through a ProSe communication 5 (P C5) interface. The terminal device 101 and the terminal device 102 are separately connected to the access network device 103 through an NR-Uu interface, and the access network device 103 is connected to the AMF 104 through an NG-C interface. The AMF 104 is connected to the LMF 105 through an NL1 interface. The NR-Uu interface is a communication interface between the terminal device and the access network device. The NG-C interface is a control plane interface between the access network and the core network. The NL1 interface is a communication interface between the AMF and the LMF.

[0127] Figure 1 shows only an example in which the communication system includes terminal device 101, terminal device 102, and access network device 103. In actual applications, the communication system may include at least two terminal devices and at least one access network device. This is not particularly limited in this application. The technical solution in this application is performed between terminal device 101 and terminal device 102 to achieve sidelink positioning between terminal device 101 and / or terminal device 102.

[0128] Figure 2 shows another embodiment of the communication system according to the embodiments of this application. Refer to Figure 2. The communication system includes terminal devices 201 and 202. Terminal device 201 is a proximity service communication (P C5) Communicates with terminal device 202 through an interface. The technical solution in this application is performed between terminal device 201 and terminal device 202 to realize sidelink positioning between terminal device 201 and / or terminal device 202.

[0129] Figure 3 shows another embodiment of the communication system according to the embodiments of this application. Refer to Figure 3. The communication system includes terminal device 301, RSU 302, RSU 303, and RSU 304. Terminal device 301 and RSU 302-RSU 304 are outside the signal coverage of the access network device. As shown in Figure 3, terminal device 301 communicates with the RSU through the PC5 interface. Terminal device 301 and the RSU can be positioned by using the technical solutions of this application.

[0130] It should be noted that the form of the RSU in the communication system shown in Figure 3 is merely an example and is not particularly limited to the RSU in this application.

[0131] It should be noted that an RSU is a roadside unit located on the roadside, supporting side-link communication and positioning-related protocols, and capable of providing wireless communication capabilities to terminal devices. An RSU may be various forms of roadside rest areas, access points, or side-link devices. For an access network device, the RSU is a terminal device. For a terminal device, the RSU may function as an access network device.

[0132] Figure 4 shows another embodiment of the communication system according to the embodiments of this application. The communication system includes terminal device 401, terminal device 402, access network device 403, and LMF 404. Terminal device 401 is located within the signal coverage of access network device 403, while terminal device 402 is not located within the signal coverage of access network device 403. Terminal devices 401 and 402 may perform the technical solutions of this application and transmit corresponding measurement results to LMF 404 via access network device 403, so that LMF 404 can position terminal devices 401 and / or terminal device 402.

[0133] In the communication systems shown in Figures 1 and 4, LMF is the name used in the current communication system. In future communication systems, the name LMF may change as the communication system evolves. The name LMF is not limited in this application. For example, LMF may be called a location management device, which is configured to perform positioning calculations for the location of a terminal device. Any functional network element having a different name and similar functionality to that of an LMF in the current or future communication system may be understood as a location management device in the embodiments of this application and is applicable to the communication methods provided in the embodiments of this application.

[0134] The above-mentioned communication systems to which this application is applicable are merely examples. In practical applications, this application is further applicable to other communication systems having positioning requirements. This is not particularly limited in this application. The above examples are not intended to limit the technical solutions of this application.

[0135] The terminal device and access network device described in this application are described below.

[0136] The terminal device may be a wireless terminal device capable of receiving scheduling and instruction information from an access network device. The wireless terminal device may also be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connectivity, or another processing device connected to a wireless modem.

[0137] Terminal devices are also user devices (U E), mobile station (M S), mobile devices (M Also known as T), a terminal device is a device that includes wireless communication capabilities (providing voice / data connectivity to the user), such as a handheld device or in-vehicle device with wireless connectivity. Currently, some examples of terminal devices include mobile phones, tablet computers, notebook computers, palmtop computers, trains, automobiles, unmanned aerial vehicles, airplanes, and mobile internet devices. (M ID, wearable devices, virtual reality (V R) Devices, Augmented Reality (AR) These include devices, wireless terminals in industrial control, wireless terminals in the Internet of Vehicles, wireless terminals in self-driving (e.g., unmanned aerial vehicles or vehicles), wireless terminals in smart grids, wireless terminals in transportation safety, and wireless terminals in smart cities. For example, wireless terminals in the Internet of Vehicles may include in-vehicle devices, overall vehicle devices, in-vehicle modules, and vehicles. Wireless terminals in industrial control may include robots, etc.

[0138] An access network device is a device that is deployed in a wireless access network and provides wireless communication capabilities to terminal devices. The access network device enables terminal devices to access the wireless network. (R AN)Node is also acceptable.

[0139] Access network devices are evolved node B (e NB), Wireless Network Controller (R NC), Node B (N B) Base station controller (B SC), base transceiver station (BTS), home base station (for example) 、H NB), Bassband Unit (B BU), Wireless Fidelity (W Access point in i-Fi system (A P) Wireless relay node, wireless backhaul node, transmission point (T P), transmit / receive point (T This includes, but is not limited to, RPs, or network devices in 5G mobile communication systems, such as next-generation node B (g NB), new radio (N R) Transmit / receive points in the system (TRP) or transmission point (T P) or an antenna panel of one or a group of base stations (including multiple antenna panels) in a 5G mobile communication system. Alternatively, the access network device may be a network node forming a gNB or transmission point, e.g., a baseband unit. (B BU) or distributed unit (D U) is also acceptable.

[0140] In some configurations, the gNB may include a central unit (CU) and a DU. The gNB may further include an active antenna unit (AAU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB.

[0141] For example, CUs are responsible for handling non-real-time protocols and services, as well as the RRC layer and packet data convergence protocols. (P The DCP layer implements the functionality of the DU. The DU is responsible for processing physical layer protocols and real-time services, and for radio link control. (R LC) Layer, Media Access Control (M AC) Layer and Physical (P The HY layer functions are implemented. The AAU implements several physical layer processing functions, radio frequency processing, and functions related to the active antenna. Information in the RRC layer is ultimately changed to information in the PHY layer, or is changed from information in the PHY layer. Therefore, in this architecture, higher layer signaling (e.g., RRC layer signaling) may be considered to be transmitted by the DU or transmitted by the DU and AAU.

[0142] It can be understood that an access network device may be a device that includes one or more of the following: CU nodes, DU nodes, and AAU nodes. Furthermore, the CU is an access network(R It may be classified as a network device within the AN, or the CU may be classified as a core network (C It may be classified as a network device within N). This is not limited to this application.

[0143] The following explains some of the technical terms used in this application.

[0144] The configuration information for a positioning reference signal resource primarily indicates information about the time-frequency resources that can be occupied by the reference signal. This configuration information includes the following: time-domain symbol position, frequency-domain position, comb size corresponding to the positioning reference signal resource, frequency-domain offset value (i.e., the number of subcarrier offsets relative to subcarrier 0), periodic features, and the positioning reference signal itself. resource It includes at least one of the following: a sequence identifier and an identifier for a positioning reference signal resource.Optionally, the configuration of the positioning reference signal resource. information This may include some further information, such as reference signal ports, beam direction, and path loss parameters.

[0145] Comb size corresponding to a positioning reference signal resource: Typically, the comb size is the difference between the indices of any two adjacent subcarriers among the subcarriers occupied by the resource on a time-domain symbol, or the number of subcarriers in the space between any two adjacent subcarriers among the subcarriers occupied by the resource on a time-domain symbol, plus 1. For example, as shown in Figure 5, the resource includes a time-frequency resource represented by the shaded area in Figure 5. The resource occupies subcarriers 0, 4, 8, 12, 16, and 20 on time-domain symbol 0. There are three subcarriers between subcarrier 0 and subcarrier 4, and three subcarriers between subcarrier 4 and subcarrier 8. Similarly, there are also three subcarriers between subcarrier 16 and subcarrier 20. The comb size is found to be 4. For a positioning reference signal resource, the positioning reference signal resource occupies at least one time-domain symbol. The comb size corresponding to a positioning reference signal resource is the difference between the indices of any two adjacent subcarriers among the subcarriers occupied by the positioning reference signal resource on each time-domain symbol, or the number of subcarriers in the space between any two adjacent subcarriers among the subcarriers occupied by the positioning reference signal resource on each time-domain symbol, plus 1. The comb size of the positioning reference signal resource on each time-domain symbol is the same. The subcarriers occupied by the positioning reference signal resource on each time-domain symbol are distributed evenly or at equal intervals. For example, as shown in Figure 8, the comb size of positioning reference signal resource 1 on each time-domain symbol is 4.

[0146] Resource Pool: A side-link communication system comprises at least one resource pool. Each resource pool includes a segment of frequency resources and a group of time resources, such as a group of slot units. The side-link communication system uses signaling to communicate the available frequency domain resources and available time resources within the resource pool. region Resources may be indicated. Resource scheduling in a sidelink communication system is performed based on a resource pool. Specifically, a user may schedule, indicate, or reserve only resources within a single resource pool, such as time resources, frequency resources, or positioning reference signal resources. A positioning reference signal resource indicates a time-frequency resource, indicated by reference signal configuration information, for transmitting a reference signal.

[0147] Optional, bandwidth portion (B WP) is the available bandwidth of a sidelink communication system, and the bandwidth of the resource pool is typically less than or equal to the bandwidth portion.

[0148] Rounding: Rounding includes rounding up, rounding down, or rounding off. For example, rounding W means rounding W up, rounding W down, or rounding off W.

[0149] The communication system to which this application is applicable includes a first communication device and a second communication device. Optionally, the communication system further includes a third communication device.

[0150] The following describes several possible implementations of the first and second communication devices.

[0151] Implementation Method 1: The first communication device is the first terminal device, and the second communication device is the second terminal device.

[0152] For example, as shown in Figure 2, the first communication device is terminal device 201, and the second communication device is terminal device 202.

[0153] Implementation method 2: The first communication device is an RSU, and the second communication device is a terminal device.

[0154] For example, as shown in Figure 3, the first communication device is RSU302, and the second communication device is terminal device 301.

[0155] Implementation method 3: The first communication device is a terminal device, and the second communication device is an RSU.

[0156] For example, as shown in Figure 3, the first communication device is terminal device 301, and the second communication device is RSU 302.

[0157] In a sidelink communication system, communication transmission may be performed between terminal devices based on a sidelink. A positioning reference signal may be transmitted between different terminal devices to achieve sidelink positioning between terminal devices.

[0158] In a sidelink communication system, the minimum scheduling resource is a subchannel. Specifically, a segment of spectral resources within a single slot (including one or more subchannels) can only be allocated to one user, not multiple users. Therefore, a terminal device can reserve only one or a few specific subchannels and transmit positioning reference signals using the reserved subchannels. The above technical solution shows a lack of flexibility in resource reservation by the terminal device.

[0159] This application provides a corresponding technical solution to enable a first communication device to flexibly reserve positioning reference signal resources and to realize sidelink positioning between the first communication device and the second communication device.

[0160] Furthermore, sidelink positioning accuracy is typically strongly related to the transmission bandwidth of the positioning reference signal. For example, positioning accuracy depends on the accuracy of the measured quantity, such as the time of arrival. The accuracy of the time of arrival is related to the signal bandwidth. A larger signal bandwidth results in higher time of arrival accuracy and smaller error.

[0161] Therefore, in order to ensure positioning accuracy, the transmission bandwidth of the positioning reference signal needs to be increased as much as possible. For example, a terminal device occupies the entire bandwidth in the resource pool (i.e., all subchannels of the resource pool) and transmits the positioning reference signal based on the entire bandwidth, thereby improving positioning accuracy. If all subchannels in one slot are allocated to a single user, user capacity is limited. When there are many users in a sidelink communication system, the problem of insufficient system capacity arises, and as a result, the positioning requirements of some users cannot be met. On the other hand, in order to meet the positioning requirements of multiple users in the same slot, each user needs to occupy a different subchannel. As a result, the transmission bandwidth of the positioning reference signal for each user is limited, and positioning accuracy is low. Therefore, how to improve system capacity and positioning accuracy is the problem to be solved in this application.

[0162] The technical solution of this application will be described below with reference to specific embodiments.

[0163] Figure 6 is a diagram illustrating an embodiment of the resource instruction method according to an embodiment of this application. Refer to Figure 6. The method includes the following steps.

[0164] 601: The first communication device determines the SCI, which is used to indicate or reserve M positioning reference signal resources.

[0165] M positioning reference signal resources correspond to N time units. Each time unit corresponds to at least one positioning reference signal resource. Both M and N are integers greater than or equal to 1; that is, M is greater than or equal to N.

[0166] Specifically, the first communication device reserves M positioning reference signal resources based on SCI.

[0167] N time units are optionally instructed or reserved by the first communication device.

[0168] Optionally, the time unit may be multiple slots, one slot, half a slot, or several time domain symbols within a single slot. The technical solution of this application will be primarily described below by using an example in which the time unit is one slot.

[0169] For example, as shown in Figure 8, the first communication device determines SCI1, and N time units include slot 1, slot 12, and slot 15. Specifically, the first communication device transmits positioning reference signals on M positioning reference signal resources corresponding to slot 1, slot 12, and slot 15.

[0170] M positioning reference signal resources are some or all of P pre-configured positioning reference signal resources, where P is an integer greater than or equal to 1.

[0171] Specifically, P pre-configured positioning reference signal resources are pre-configured in the side-link communication system. The first communication device may select M positioning reference signal resources from the P pre-configured positioning reference signal resources.

[0172] For example, as shown in Figure 8, N time units include slot 1, slot 12, and slot 15. P pre-configured positioning reference signal resources include positioning reference signal resource 1, positioning reference signal resource 2, positioning reference signal resource 3, and positioning reference signal resource 4. As shown in Figure 7. 、S CI1 teeth The first communication device indicates that it will transmit a positioning reference signal on positioning reference signal resource 1 in slot 1, positioning reference signal resource 3 in slot 12, and positioning reference signal resource 2 in slot 15. showru.

[0173] For example, as shown in Figure 8, N time units include slot 1, slot 12, and slot 15. P pre-configured positioning reference signal resources include positioning reference signal resource 1, positioning reference signal resource 2, positioning reference signal resource 3, and positioning reference signal resource 4. 。S CI teeth The first communication device indicates that it will transmit a positioning reference signal on positioning reference signal resource 1 in slot 1, positioning reference signal resource 2 in slot 1, positioning reference signal resource 3 in slot 12, and positioning reference signal resource 2 in slot 15. Show In other words, the first communication device may indicate or reserve multiple positioning reference signal resources within each time unit.

[0174] The sidelink communication system may configure positioning reference signal resources in a pre-configured manner, thereby improving the flexibility of the first communication device in reserving positioning reference signal resources by pre-configuring the positioning reference signal resources that can be reserved based on actual requirements. Furthermore, the first communication device selects positioning reference signal resources from P pre-configured positioning reference signal resources and designates or reserves M positioning reference signal resources. This helps reduce the complexity of resource reservation by the first communication device.

[0175] Optionally, the frequency bands occupied by different positioning reference signal resources among the P pre-configured positioning reference signal resources have an overlapping portion. resource This occupies a specific bandwidth, and the frequency range corresponding to that bandwidth may be called the frequency band occupied by the positioning reference signal resource.

[0176] For example, as shown in Figure 8, P pre-configured positioning reference signal resources include positioning reference signal resource 1, positioning reference signal resource 2, positioning reference signal resource 3, and positioning reference signal resource 4. The four positioning reference signal resources occupy the same frequency band.

[0177] Optionally, each of the P pre-configured positioning reference signal resources occupies part or all of the bandwidth of the resource pool.

[0178] For example, as shown in Figure 8, the P pre-configured positioning reference signal resources include positioning reference signal resource 1, positioning reference signal resource 2, positioning reference signal resource 3, and positioning reference signal resource 4. Each positioning reference signal resource may occupy the entire bandwidth of the resource pool in the frequency domain.

[0179] As shown in Figure 8, one slot corresponds to four positioning reference signal resources. Each positioning reference signal resource may be allocated to one user, and different users may occupy different positioning reference signal resources. Therefore, multiple users can transmit positioning reference signal resources within a single slot, and the bandwidth required for each user to transmit positioning reference signals is the bandwidth of the resource pool. In this way, resources can be reused by multiple users, thereby improving system capacity. User positioning accuracy is ensured while ensuring multi-user multiplexing.

[0180] The following describes two possible configurations for P pre-configured positioning reference signal resources.

[0181] Method 1: N time units include P pre-configured positioning reference signal resources.

[0182] In Method 1, the sidelink communication system preconfigures positioning reference signal resources by using time units as the granularity. In other words, each time unit contains at least one preconfigured positioning reference signal resource. The number of preconfigured positioning reference signal resources contained in each of the N time units may be the same or different. This is not particularly limited in this application. The N time units contain a total of P preconfigured positioning reference signal resources.

[0183] For example, as shown in Figure 8, N time units are N slots. Positioning reference signal resources 1 to 4 are four pre-configured positioning reference signal resources contained in one of the N slots. If the number of pre-configured positioning reference signal resources contained in each slot is the same, then P is equal to 4 × N.

[0184] Optionally, the configurations of pre-configured positioning reference signal resources included in different time units among the N time units may be the same or different. This is not particularly limited in this application. Within the same time unit, different pre-configured positioning reference signal resources may have different configurations.

[0185] For the configuration of positioning reference signal resources, refer to the relevant explanations of the technical terms above. A terminal device may determine the specific location of each pre-configured positioning reference signal resource within each time unit based on the configuration of the pre-configured positioning reference signal resources included in each time unit. For example, as shown in Figure 8, slot 1 includes pre-configured positioning reference signal resources 1 to 4. A terminal device may determine the specific location of positioning reference signal resource 1 within slot 1 based on the configuration of positioning reference signal resource 1.

[0186] For example, N time units are N slots, and each of the N slots contains pre-configured positioning reference signal resource 1, positioning reference signal resource 2, positioning reference signal resource 3, and positioning reference signal resource 4, as shown in Figure 8. In other words, the configuration of the pre-configured positioning reference signal resources contained in different slots is the same.

[0187] For example, N time units are N slots, and N slots are slot 1 and slot 1. 2 Slot 1 includes positioning reference signal resources 1 to 4 shown in Figure 8. Slot 2 includes positioning reference signal resource 1 and positioning reference signal resource 2 shown in Figure 9. In other words, the configurations of the pre-configured positioning reference signal resources included in different slots may be different.

[0188] Method 2: A resource pool containing N time units includes P pre-configured positioning reference signal resources.

[0189] In Method 2, the sidelink communication system preconfigures positioning reference signal resources by using resource pools as the granularity. N time units may reside in one or more resource pools, each of which contains at least one preconfigured positioning reference signal resource This includes: One or more resource pools contain a total of P pre-configured positioning reference signal resources.

[0190] From the above related explanation regarding resource pools, it should be noted that each resource pool contains a corresponding time-frequency resource. Therefore, a resource pool containing N time units is the resource pool to which N time units belong. For example, N time units include time unit 1 and time unit 2. Both time unit 1 and time unit 2 are time-domain resources in the first resource pool. Therefore, time unit 1 and time unit 2 are located in the first resource pool. For example, N time units are located in one resource pool. As shown in Figure 8, the resource pool includes pre-configured positioning reference signal resource 1, positioning reference signal resource 2, positioning reference signal resource 3, and positioning reference signal resource 4. Therefore, P is equal to 4. The first communication device may select at least one positioning reference signal resource corresponding to each time unit from the four positioning reference signal resources. The first communication device then transmits an SCI to the second communication device. The SCI is for indicating or reserving at least one positioning reference signal resource. At least one positioning reference signal resource provides positioning reference signals within a time unit. resource This is used by the first communication device to transmit. For example, N time units are N slots, and the N slots include slot 1, slot 12, and slot 15. At least one positioning reference signal resource includes positioning reference signal resource 1 in slot 1, positioning reference signal resource 3 in slot 12, and positioning reference signal resource 2 in slot 15. In other words, the first communication device reserves one positioning reference signal resource in each slot.

[0191] Optionally, N time units belong to the same resource pool. Within the resource pool to which N time units belong, different pre-configured positioning reference signal resources have different configurations.

[0192] For information on the configuration of positioning reference signal resources, please refer to the relevant explanations of the technical terms above.

[0193] For example, N time units are N slots, and N slots include slot 1, slot 12, and slot 15. Slots 1, 12, and 15 are located in resource pool 1. Resource pool 1 includes positioning reference signal resources 1 to 4, as shown in Figure 8. From Figure 8, it can be seen that different positioning reference signal resources in resource pool 1 have different configurations.

[0194] Optionally, N time units reside in multiple resource pools, and the number of pre-configured positioning reference signal resources contained in each of the multiple resource pools may be the same or different. This is not particularly limited in this application. If each resource pool contains Q pre-configured positioning reference signal resources, then P is equal to Q × N, where Q is an integer greater than or equal to 1.

[0195] Optionally, N time units reside in multiple resource pools, and the configurations of pre-configured positioning reference signal resources contained in different resource pools may be the same or different. This is not particularly limited in this application.

[0196] Below, we describe several possible implementations of P pre-configured positioning reference signal resources based on the above method 1 (i.e., N time units contain P pre-configured positioning reference signal resources).

[0197] Implementation method 1: When N time units contain P pre-configured positioning reference signal resources, different pre-configured positioning reference signal resources contained in each time unit satisfy a frequency division multiplexing relationship on the same time-domain resource.

[0198] For example, as shown in Figure 8, N time units are N slots, and one of the N slots contains positioning reference signal resource 1, positioning reference signal resource 2, positioning reference signal resource 3, and positioning reference signal resource 4. The N slots belong to the same resource pool. Each positioning reference signal resource occupies the entire bandwidth of the resource pool, i.e., the bandwidth of the resource pool shown in Figure 8. Different positioning reference signal resources occupy different subcarriers on the same time-domain symbol, but each positioning reference signal resource occupies the entire bandwidth of the resource pool in the frequency domain. As shown in Figure 8, all four positioning reference signal resources occupy time-domain symbols 1 to 6, and positioning reference signal resource 1, positioning reference signal resource 2, positioning reference signal resource 3, and positioning reference signal resource 4 satisfy the frequency division multiplexing relationship on any one of time-domain symbols 1 to 6. For example, positioning reference signal resource 1 occupies subcarriers 0, 4, and 8 on time-domain symbol 1; positioning reference signal resource 2 occupies subcarriers 1, 5, and 9 on time-domain symbol 1; positioning reference signal resource 3 occupies subcarriers 2, 6, and 10 on time-domain symbol 1; and positioning reference signal resource 4 occupies subcarriers 3, 7, and 11 on time-domain symbol 1. Different positioning reference signal resources occupy different subcarriers on the same time-domain symbol. In this way, each positioning reference signal resource occupies the entire bandwidth of the resource pool, and different positioning reference signal resources satisfy the frequency division multiplexing relationship on the same time-domain resource.

[0199] In this implementation, multi-user multiplexing may be implemented between different positioning reference signal resources using a frequency division scheme. For example, user 1 uses positioning reference signal resource 1 and positioning reference signal resource 2, user 2 uses positioning reference signal resource 3, and as a result, multiple users can access the positioning reference signal within a single slot. resourceThis enables the transmission of a positioning reference signal, ensuring that the transmission bandwidth for each user's positioning reference signal is equal to the bandwidth of the resource pool. In this implementation, terminal devices may reserve resources at the granularity of the reference signal resource rather than at the granularity of non-subchannels, thereby improving positioning accuracy and ensuring multi-user capacity.

[0200] Implementation method 2: When N time units contain P pre-configured positioning reference signal resources, different pre-configured positioning reference signal resources contained in each time unit satisfy a time-division multiplexing relationship on the same frequency domain resource.

[0201] For example, as shown in Figure 9, N time units are N slots, and one of the N slots contains positioning reference signal resource 1 and positioning reference signal resource 2. Each positioning reference signal resource occupies the total bandwidth of the resource pool, i.e., the bandwidth of the resource pool shown in Figure 9. Positioning reference signal resource 1 and positioning reference signal resource 2 occupy different time-domain symbols. As shown in Figure 9, positioning reference signal resource 1 occupies time-domain symbols 2 and 3, and positioning reference signal resource 2 occupies time-domain symbols 5 and 6. The subcarriers occupied by positioning reference signal resource 1 on one time-domain symbol may be the same as or different from the subcarriers occupied by positioning reference signal resource 2 on one time-domain symbol. However, positioning reference signal resource 1 and positioning reference signal resource 2 occupy the total bandwidth of the resource pool in the frequency domain. For example, the subcarrier occupied by positioning reference signal resource 1 on time-domain symbol 2 is the same as the subcarrier occupied by positioning reference signal resource 2 on time-domain symbol 6. In this way, each positioning reference signal resource occupies the entire bandwidth of the resource pool, and different positioning reference signal resources satisfy the time-division multiplexing relationship on the same frequency-domain resource.

[0202] In this implementation, multi-user multiplexing may be implemented between different positioning reference signal resources using a time-division multiplexing scheme. Specifically, multiple time-domain symbols within a single slot are divided into multiple groups of time-domain symbols, and each group of time-domain symbols corresponds to one positioning reference signal resource. Different users use positioning reference signals on time-domain symbols of different groups. resource This transmits a positioning reference signal, and as a result, multiple users in the same slot receive a positioning reference signal. resource The system will be configured to transmit the following. The transmission bandwidth for each user's positioning reference signal may also be the bandwidth of the resource pool. In this way, system capacity is increased and positioning accuracy is improved.

[0203] For example, User 1 transmits a positioning reference signal on positioning reference signal resource 1 in the slot shown in Figure 9. User 2 transmits a positioning reference signal on positioning reference signal resource 2 in the slot shown in Figure 9. This helps to avoid frequency offset errors introduced by the high-speed movement of User 1 and User 2, and to avoid mutual interference between the signals of the two users, thereby improving positioning accuracy.

[0204] Implementation method 3: When N time units contain P pre-configured positioning reference signal resources, in each time unit, positioning reference signal resources occupying the same time domain resource satisfy a frequency division multiplexing relationship on the same time domain resource, and positioning reference signal resources occupying the same frequency domain resource satisfy a time division multiplexing relationship on the same frequency domain resource.

[0205] For example, as shown in Figure 10, N time units are N slots, and one of the N slots contains positioning reference signal resource 1, positioning reference signal resource 2, positioning reference signal resource 3, and positioning reference signal resource 4. Each positioning reference signal resource occupies the total bandwidth of the resource pool, i.e., the bandwidth of the resource pool shown in Figure 9. Both positioning reference signal resource 1 and positioning reference signal resource 2 occupy time-domain symbol 1 and time-domain symbol 2. Positioning reference signal resource 1 and positioning reference signal resource 2 satisfy the frequency division multiplexing relationship on time-domain symbol 1. Positioning reference signal resource 1 and positioning reference signal resource 2 satisfy the frequency division multiplexing relationship on time-domain symbol 2. Both positioning reference signal resource 3 and positioning reference signal resource 4 occupy time-domain symbol 5 and time-domain symbol 6. Positioning reference signal resource 3 and positioning reference signal resource 4 satisfy the frequency division multiplexing relationship on time-domain symbol 5. Positioning reference signal resource 3 and positioning reference signal resource 4 satisfy the frequency division multiplexing relation on time-domain symbol 6.

[0206] In this implementation method, each positioning reference signal resource occupies the entire bandwidth of the resource pool. Multi-user multiplexing is implemented between positioning reference signal resource 1 and positioning reference signal resource 2 using a frequency division scheme. Multi-user multiplexing is implemented between positioning reference signal resource 3 and positioning reference signal resource 4 This may be implemented between the two. This helps improve resource utilization. The transmission bandwidth of each user's positioning reference signal may also be the bandwidth of the resource pool. In this way, system capacity is increased and positioning accuracy is improved.

[0207] It should be noted that the above example is illustrated using a scenario where each positioning reference signal resource occupies the entire bandwidth of the resource pool. In actual applications, the bandwidth occupied by each positioning reference signal resource may be configured by the access network device or pre-configured, and may not necessarily occupy the entire bandwidth of the resource pool.

[0208] Below, we describe several possible implementations of P pre-configured positioning reference signal resources based on the above method 2 (i.e., a resource pool containing N time units contains P pre-configured positioning reference signal resources).

[0209] Implementation Method 1: When a resource pool containing N time units includes P pre-configured positioning reference signal resources, different positioning reference signal resources within the pre-configured positioning reference signal resources in the resource pool containing each of the N time units satisfy a frequency division multiplexing relationship on the same time-domain resource. Each positioning reference signal resource occupies the entire bandwidth of the resource pool.

[0210] Implementation Method 2: When a resource pool containing N time units includes P pre-configured positioning reference signal resources, different positioning reference signal resources within the pre-configured positioning reference signal resources in the resource pool containing each of the N time units satisfy a time-division multiplexing relationship on the same frequency domain resource. Each positioning reference signal resource occupies the entire bandwidth of the resource pool.

[0211] Implementation Method 3: When a resource pool containing N time units includes P pre-configured positioning reference signal resources, in the pre-configured positioning reference signal resources included in the resource pool containing each of the N time units, positioning reference signal resources occupying the same time domain resource satisfy a frequency division multiplexing relationship on the same time domain resource, and positioning reference signal resources occupying the same frequency domain resource satisfy a time division multiplexing relationship on the same frequency domain resource. Each positioning reference signal resource occupies the entire bandwidth of the resource pool.

[0212] Implementation methods 1 to 3 are similar to the above methods, which include N time units and P pre-configured positioning reference signal resources. For details, please refer to the related explanations above.

[0213] Optionally, the SCI includes a first field, which is used to indicate or reserve M positioning reference signal resources.

[0214] For example, as shown in Figure 11, the SCI includes a first field, and the first communication device may indicate or reserve M positioning reference signal resources based on the value of the first field. For example, the first field indicates the index of the M positioning reference signal resources or the identifier of the M positioning reference signal resources.

[0215] Optionally, the length of the first field is the maximum number of time units that can be indicated or reserved by the SCI, or the positioning reference signal that can be indicated or reserved by the SCI. resource It is determined based on the maximum number.

[0216] The length of the first field is described below with reference to the configuration scheme of P pre-configured positioning reference signal resources.

[0217] 1. When N time units contain P pre-configured positioning reference signal resources, each time unit contains the same number of pre-configured positioning reference signal resources. The length of the first field is determined based on the maximum number of time units that can be indicated or reserved by the SCI and the number of pre-configured positioning reference signal resources included in each time unit, or the length of the first field is determined based on the maximum number of positioning reference signal resources that can be indicated or reserved by the SCI and the number of pre-configured positioning reference signal resources included in each time unit.

[0218] In this implementation method, the length of the first field is optionally determined by the following conditions, namely:

number

[0219]

number

number

number

number

[0220] For example, as shown in Figure 11, the maximum number of slots that can be instructed or reserved by SCI is K. reserve The number is 3, and each slot contains 4 pre-configured positioning reference signal resources, i.e., N slprs It is equal to 4. In this case, there are a total of 64 possible choices. Therefore, the length of the first field Saha 6 bits is also acceptable.

[0221] For example, as shown in Figure 11, the maximum number of slots that can be instructed or reserved by SCI is K. reserve The number is 3, and each slot has two pre-configured positioning reference signals. resource Including, that is, N slprs It is equal to 2. In this case, there are a total of 8 possible options. Therefore, the length of the first field Saha 3 bits is also acceptable.

[0222] In this implementation, optionally, in the possible implementations, the length of the first field is subject to the following conditions, namely,

number

[0223] N slprs k represents the number of pre-configured positioning reference signal resources included in each time unit. reserve k0 represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field. k0 may be an integer greater than or equal to 1. For example, k0 is a constant, i.e., a fixed value. k0 may be an integer greater than or equal to 1, and it can be seen that the SCI indicates the index of positioning reference signal resources only within some time units (e.g., some slots). k1 is an integer greater than or equal to 0, or k1 is determined based on the system coefficient. For example, k1=k0, k1=k reserve Or k1=N slprs That is the case.

[0224] Alternatively, the length of the first field is given by the following conditions:

number

[0225] N slprs k represents the number of pre-configured positioning reference signal resources included in each time unit. reserve k0 represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field. k0 may be an integer greater than or equal to 1. For example, k0 is a constant, i.e., a fixed value. k0 may be an integer greater than or equal to 1, and it can be seen that the SCI indicates the index of positioning reference signal resources only within some time units (e.g., some slots). In possible implementations, a=0 or a=1. In other possible implementations, a=k0, a=kreserve Or k1=N slprs That is the case.

[0226] Alternatively, the length of the first field satisfies a certain condition: namely, the length of the first field is 4W bits, where W is an integer greater than or equal to 1.

[0227] For example, the length of the first field is 4 bits, 8 bits, or 12 bits. The length of the first field is 4 bits when the SCI can indicate a positioning reference signal resource within only one time unit (e.g., a future slot). The length of the first field is 8 bits when the SCI can indicate or reserve a positioning reference signal resource within two time units (e.g., two future slots). The length of the first field is 12 bits when the SCI can indicate or reserve a positioning reference signal resource within three time units (e.g., three future slots).

[0228] For example, as shown in Table 1, the length of the first field is 8 bits. The four most significant bits in the first field (i.e., the most significant bit (M SB)) indicates one positioning reference signal resource (i.e., the first positioning reference signal resource) and the four least significant bits in the first field (i.e., the least significant bit (L SB)) indicates another positioning reference signal resource (i.e., a second positioning reference signal resource). Alternatively, when SCI can indicate or reserve only one positioning reference signal resource, the length of the first field is 4 bits. When SCI can indicate or reserve two positioning reference signal resources, the length of the first field is 8 bits. The four most significant bits in the first field indicate the first positioning reference signal resource, and the four least significant bits in the first field indicate the second positioning reference signal resource. [Table 1]

[0229] Alternatively, the length of the first field is 8 bits, the four least significant bits in the first field indicate the positioning reference signal resource in the first of two time units, and the four most significant bits in the first field indicate the positioning reference signal resource in the second of two time units.

[0230] In another example, as shown in Table 2, the length of the first field is 12 bits. The four most significant bits in the first field (i.e., bits 1-4) indicate the first positioning reference signal resource, the four intermediate bits in the first field (i.e., bits 5-8) indicate the second positioning reference signal resource, and the four least significant bits in the first field (i.e., bits 9-12) indicate the third positioning reference signal resource. [Table 2]

[0231] Two possible realizations of the value of the first field are described below. This application is also applicable to other realizations, and is not particularly limited in this application.

[0232] Implementation Method 1: The value of the first field is determined by the following condition, i.e., I1 + I2 × N slprs +…I N × (N slprs ) N-1 Or I1 + I2 × N slprs +…I N × (N slprs ) N-1 Satisfying +Y.

[0233] I1 represents the index of the positioning reference signal resource within the first of the N time units designated or reserved by the SCI. I2 represents the index of the positioning reference signal resource within the second of the N time units designated or reserved by the SCI. Nis the index of the positioning reference signal resource within the Nth time unit out of N time units indicated or reserved by SCI. slprs represents the number of pre-configured positioning reference signal resources included in each time unit. The index of the pre-configured positioning reference signal resources included in each of the N time units is encoded from 0. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0234] For example, if N is equal to 1, the value of the first field is I1. If N is equal to 2, the value of the first field is I1 + I2 × N slprs Therefore, if N is equal to 3, the value of the first field is I1 + I2 × N. slprs +I3×(N slprs ) 2 That is the case.

[0235] For example, N time units are N slots, and the N slots are slot 1, slot 12, and slot 15. That is, N is equal to 3. Each slot contains four pre-configured positioning reference signal resources, with corresponding indices 0, 1, 2, and 3. The value of the first field is 63. From the conditions, we can see that the values ​​of the first field satisfy I1=3, I2=3, and I3=3. Therefore, we can see that SCI is for indicating or reserving the positioning reference signal resource with index 3 in slot 1, the positioning reference signal resource with index 3 in slot 12, and the positioning reference signal resource with index 3 in slot 15. Each slot contains four pre-configured positioning reference signal resources, with I1 varying at a granularity of 1, I2 varying at a granularity of 4, and I3 varying at a granularity of 16.

[0236] Implementation Method 2: The value of the first field is determined by the following condition, i.e., I1 + I2 × N slprs +…I N × (Nslprs ) N-1 -1 or I1 + I2 × N slprs +…I N × (N slprs ) N-1 It satisfies -1 + Y.

[0237] I1 represents the index of the positioning reference signal resource within the first of the N time units designated or reserved by the SCI. I2 represents the index of the positioning reference signal resource within the second of the N time units designated or reserved by the SCI. N is the index of the positioning reference signal resource within the Nth time unit out of N time units indicated or reserved by SCI. slprs represents the number of pre-configured positioning reference signal resources included in each time unit. The index of the pre-configured positioning reference signal resources included in each of the N time units is encoded from 1. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0238] Implementation method 2 is the same as implementation method 1. For details, please refer to the related explanation for implementation method 1 above.

[0239] 2. When a resource pool containing N time units includes P pre-configured positioning reference signal resources, the N time units belong to the same resource pool. The length of the first field is determined based on the maximum number of time units that can be indicated or reserved by the SCI and the number of pre-configured positioning reference signal resources included in the resource pool, or the length of the first field is determined based on the maximum number of positioning reference signal resources that can be indicated or reserved by the SCI and the number of pre-configured positioning reference signal resources included in the resource pool.

[0240] In this implementation method, the length of the first field is subject to the following conditions, namely,

number

number

number

number

number

[0241] For example, as shown in Figure 11, the maximum number of positioning reference signal resources that can be instructed or reserved by SCI is K. reserve When is 2, the resource pool includes four pre-configured positioning reference signal resources, i.e., N slprs It is equal to 4. In this case, there are a total of 16 possible options. Therefore, the length of the first field Saha 4 bits is also acceptable.

[0242] For example, as shown in Figure 11, the maximum number of slots that can be instructed or reserved by SCI is K. reserve When it is 3, the resource pool has two pre-configured positioning reference signals resource Including, that is, N slprsIt is equal to 2. In this case, there are a total of 8 possible options. Therefore, the length of the first field Saha 3 bits is also acceptable.

[0243] In this implementation method, the length of the first field is subject to the following conditions, namely,

number

[0244] Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and k reserve k0 represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field. k0 may be an integer greater than or equal to 1. For example, k0 is a constant, i.e., a fixed value. k0 may be an integer greater than or equal to 1, and it can be seen that the SCI indicates the index of positioning reference signal resources only within some time units (e.g., some slots). k1 is an integer greater than or equal to 0, or k1 is determined based on the system coefficient. For example, k1=k0, k1=k reserve Alternatively, k1 = Q.

[0245] Alternatively, optionally, the length of the first field may be determined by the following conditions, namely:

number

[0246] Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and k reservek0 represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field. k0 is an integer greater than or equal to 1, for example, k0 is a constant, i.e., a fixed value. a is an integer greater than or equal to 0. In possible realizations, a=0 or a=1. In other possible realizations, a=k0, a=k reserve Alternatively, k1 = Q.

[0247] Alternatively, the length of the first field satisfies a certain condition: namely, the length of the first field is 4W bits, where W is an integer greater than or equal to 1.

[0248] For example, the length of the first field is 4 bits, 8 bits, or 12 bits. The length of the first field is 4 bits when the SCI can indicate a positioning reference signal resource within only one time unit (e.g., a future slot). The length of the first field is 8 bits when the SCI can indicate or reserve a positioning reference signal resource within two time units (e.g., two future slots). The length of the first field is 12 bits when the SCI can indicate or reserve a positioning reference signal resource within three time units (e.g., three future slots).

[0249] For example, as shown in Table 1, the length of the first field is 8 bits. The four most significant bits (i.e., MSB) in the first field indicate one positioning reference signal resource (i.e., the first positioning reference signal resource), and the four least significant bits (i.e., LSB) in the first field indicate the other positioning reference signal resource (i.e., the second positioning reference signal resource). Alternatively, when the SCI can indicate or reserve only one positioning reference signal resource, the length of the first field is 4 bits. When the SCI can indicate or reserve two positioning reference signal resources, the length of the first field is 8 bits. The four most significant bits in the first field indicate the first positioning reference signal resource, and the four least significant bits in the first field indicate the second positioning reference signal resource. Alternatively, the length of the first field is 8 bits, the four least significant bits in the first field indicate the positioning reference signal resource in the first of two time units, and the four most significant bits in the first field indicate the positioning reference signal resource in the second of two time units.

[0250] In other examples, the length of the first field is 12 bits. Table 2 shows how the first field indicates the positioning reference signal resource.

[0251] In other possible implementations, k reserve This is indicated by using RRC signaling. For example, in a possible implementation, k reserve This is indicated by using information elements in the configuration signaling related to the sidelink resource pool within the RRC signaling. For example, k reserve This is indicated by using the MaxNumPerReserve (sl-MaxNumPerReserve) information element in the configuration signaling related to the sidelink resource pool within the RRC signaling.

[0252] In other possible implementations, the formula for calculating the length of the first field may indicate that the length of the first field relates to the maximum number of resources or time units that can be indicated in each sidelink control signaling transmission.

[0253] In other possible implementations, the formula for calculating the length of the first field is: reserve k of the positioning reference signal resources reserve -It may be indicated that only k0 positioning reference signal resources need to be indicated. The other k0 positioning reference signal resources are indicated in other ways. For example, the k0 positioning reference signal resources are indicated by using frequency-domain or time-domain position information of the PSCCH carrying control signaling (e.g., SCI). Optionally, frequency-domain position information includes a start frequency or bandwidth. The start frequency includes the start RB, start subchannel, and any other frequency-related information. The bandwidth includes the bandwidth size, e.g., the number of RBs, the number of subchannels, or the number of REs. The time-domain position information includes information such as slots, start symbols, subframes, and / or frames.

[0254] Two possible realizations of the value of the first field are described below. This application is also applicable to other realizations, and is not particularly limited in this application.

[0255] Implementation Method 1: The value of the first field is determined by the following conditions, i.e., I1 + I2 × Q + ...I N ×(Q) N-1 Or I1 + I2 × Q + ...I N ×(Q) N-1 Satisfying +Y.

[0256] I1 represents the index of the positioning reference signal resource within the first of the N time units designated or reserved by the SCI. I2 represents the index of the positioning reference signal resource within the second of the N time units designated or reserved by the SCI. NQ is the index of the positioning reference signal resource within the Nth time unit out of N time units indicated or reserved by SCI. Q represents the number of pre-configured positioning reference signal resources included in the resource pool. The indices of the pre-configured positioning reference signal resources included in the resource pool are encoded from 0. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0257] Implementation Method 2: The value of the first field is determined by the following conditions, i.e., I1 + I2 × Q + ...I N ×(Q) N-1 -1 or I1 + I2 × Q + ...I N ×(Q) N-1 It satisfies -1 + Y.

[0258] I1 represents the index of the positioning reference signal resource within the first of the N time units designated or reserved by the SCI. I2 represents the index of the positioning reference signal resource within the second of the N time units designated or reserved by the SCI. N Q is the index of the positioning reference signal resource within the Nth time unit out of N time units indicated or reserved by SCI. Q represents the number of pre-configured positioning reference signal resources included in the resource pool. The indices of the pre-configured positioning reference signal resources included in the resource pool are encoded from 1. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0259] Implementation methods 1 and 2 are similar to the two implementation methods of the value of the first field corresponding to the above method, in which N time units include P pre-configured positioning reference signal resources. For details, see the related explanation above.

[0260] It can be seen that the length of the first field is related to the maximum number of time units or positioning reference signal resources that can be indicated (or reserved) by the SCI and the number of pre-configured positioning reference signal resources included in each time unit. Alternatively, the length of the first field is related to the maximum number of time units or positioning reference signal resources that can be indicated (or reserved) by the SCI and the number of pre-configured positioning reference signal resources included in the resource pool to which N time units belong. Typically, the number of pre-configured positioning reference signal resources included in the resource pool to which each time unit or N time units belong is less than the number of subchannels corresponding to the current total bandwidth. Therefore, in the technical solution of this application, the length of the first field is short, which helps to reduce the system overhead generated when the first communication device transmits the SCI.

[0261] It should be noted that the above indicates that the first field is designed using a joint coding scheme. In practical applications, the first field may, alternatively, be designed using an independent coding scheme. For example, bits corresponding to each time unit may be designed independently, and then the first field may be formed using the bits corresponding to each time unit. The bits corresponding to each time unit are bits that indicate the positioning reference signal resources reserved by the terminal device within that time unit.

[0262] For example, N time units belong to resource pool 1, which contains four pre-configured positioning reference signal resources. One positioning reference signal resource is reserved in each of the N time units. Each time unit may occupy 4 bits of the first field. For example, the N time units are two slots, which are slot 1 and slot 3. In this case, the length of the first field is 8 bits, with the first 4 bits indicating the positioning reference signal resource reserved by the terminal device in slot 1, and the last 4 bits indicating the positioning reference signal resource reserved by the terminal device in slot 3. In other words, the bits indicating the positioning reference signal resource reserved in slot 1 and the bits indicating the positioning reference signal resource reserved in slot 3 are designed separately, and then the first field is formed by the bits corresponding to each slot.

[0263] Optionally, SCI is used to specify or reserve N more time units.

[0264] For example, as shown in Figure 7, the first communication device designates or reserves slots 1, 12, and 15 based on SCI1.

[0265] It should be noted that the first communication device may, as an alternative, indicate or reserve N time units by using other information. This is not particularly limited in this application.

[0266] Optionally, the first field is for specifying or reserving N more time units. In other words, the first field is for M positioning reference signals. resource And for indicating or reserving N time units. In this implementation, the length of the first field is further related to the number of reserved time units.

[0267] Optionally, bits for indicating or reserving N time units and bits for indicating or reserving M positioning reference signal resources may be used as the overall design of the first field. This scheme may be called a joint coding scheme. In practical applications, the first field may, alternatively, be designed using an independent coding scheme. For example, the bits for indicating or reserving N time units and the bits for indicating or reserving M positioning reference signal resources may be designed independently, and then the first field may be formed using the two parts of bits.

[0268] Optionally, the SCI may further include a second field, which is used to indicate or reserve N time units.

[0269] Optionally, the length of the second field is determined based on the maximum number of time units that can be indicated or reserved by the SCI, or the maximum number of positioning reference signal resources that can be indicated or reserved by the SCI.

[0270] For example, as shown in Figure 11, when the maximum number of slots that can be instructed or reserved by SCI is 2, 2 The length of the field may be 5 bits. When the maximum number of slots that can be indicated or reserved by SCI is 3, 2 The field length may be 9 bits.

[0271] For example, N time units are N slots, and N slots are slot 1 and slot 12. 2 The fields are for indicating or reserving slots 1 and 12. The first communication device transmits the SCI at the start of the time domain of slot 1. Therefore, the first communication device, by default, transmits the positioning reference signal in slot 1. resource It sends. Therefore, slot 1 is the 2Although it does not need to be indicated by the field, it is indirectly indicated by the time-domain position from which the first communication device transmits the SCI. Typically, the first communication device selects another slot to be indicated or reserved from the 32 slots after slot 1. For example, the first communication device selects slot 12. Therefore, 2 The length of the field may be 5 bits, and these 5 bits indicate which of the 32 slots is reserved by the first communication device.

[0272] For example, N time units are N slots, and N slots are slot 1, slot 12, and slot 15. 2 The fields are for indicating or reserving slots 1, 12, and 15. First communication Device It transmits the SCI at the start of the time domain of slot 1. Therefore, the first communication device, by default, transmits the positioning reference signal within slot 1. resource It sends. Therefore, slot 1 is the 2 Although it does not need to be indicated by the field, it is indirectly indicated by the time-domain position from which the first communication device transmits the SCI. Typically, the first communication device selects two other slots to be indicated or reserved from the 32 slots after slot 1. For example, the first communication device selects slots 12 and 15. Thus, 2 The length of the field may be 9 bits, which indicate which two of the 32 slots are reserved by the first communication device.

[0273] It should be noted that, optionally, the first field and / or the second field may be carried in an extended first-stage SCI format or a second-stage SCI format, or in a newly designed SCI. The SCI format may also be a positioning-specific SCI format. For example, the newly designed SCI may also carry side-link positioning control information.(S It may also be called PCI.

[0274] Optionally, the resource pool to which the time-frequency resources used by the first communication device to transmit SCI belong may be the same as or different from the resource pool to which the M positioning reference signal resources corresponding to N time units belong.

[0275] For example, as shown in Figure 12, the time-frequency resources used by the first communication device to transmit SCI belong to resource pool 1. The M positioning reference signal resources belong to resource pool 2. Resource pools 1 and 2 may be the same resource pool. For example, resource pool 1 is a communication resource pool. Alternatively, resource pools 1 and 2 may not be the same resource pool, with resource pool 1 being a communication resource pool and resource pool 2 being a positioning resource pool.

[0276] In this application, M positioning reference signal resources corresponding to N time units may belong to a positioning resource pool, which is a newly defined resource pool. SCI belongs to the communication resource pool, i.e., the currently defined resource pool. In this way, the first communication device directs or reserves positioning reference signal resources across resource pools.

[0277] This application further provides the following solutions, as described below.

[0278] In our opinion, to indicate the reservation of the SL-PRS resource within a future slot, the SCI should include a field named SL-PRS resource assignment. This SL-PRS resource assignment field is similar to the frequency resource assignment field in legacy sidelink systems. Hence, the design of the frequency resource assignment field can be based on the frequency resource assignment field.

[0279] K prs Each positioning reference signal resource can be configured in a dedicated positioning reference signal resource pool. In this case, K per slot prs There are several possible instructions. The maximum number of reserved positioning reference signal resources is M reserve When that is the case,

number

number

number

number

[0280] In a dedicated resource pool, the SCI must include at least a reference signal resource allocation field, and the length of the reference signal resource allocation field must be:

number

number

[0281] Frequency Resource Indicator Value (F Similar to RIV, positioning reference signal resource indicator value (P RIV) may indicate a specific positioning reference signal resource within each slot. reserv= If it is 2, then PRIV = k prs,1 Therefore, positioning reference signal resources within the same slot are indicated by the location of the PSCCH resource, and other positioning reference signal resources are indicated by PRIV. reserv If = 3, then PRIV = k prs,1 +k prs,2 *K prs k prs,1 k represents the index of the first reserved positioning reference signal resource, or the index of the positioning reference signal resource in the first reserved slot, prs,2 represents the index of the second reserved positioning reference signal resource, or the index of the positioning reference signal resource in the second reserved slot. PRIV is the time-domain resource indicator value. (T TRIV must be used in combination with N <M reserv When indicating the last M, reserv-N positioning reference signal resources are not used, which is similar to FRIV in legacy side-link communication systems. N is the number of positioning reference signal resources actually indicated by SCI. Typically, N is 1 or 2. The English description of the above is as follows: Similar to the FRIV, the PRIV (PRS resource indicator value) can be used to determine the specific SL PRS resource within each time slot. If M reserv is 2, PRIV=k prs ieSL PRS resource within the same slot is indicated by the position of PSCCH resource, and the other is indicated by the PRIV. If M reserv is 3, PRIV = k prs,1 +k prs,2 *K prs . k prs,1 denotes the index of the first reserved SL PRS resource and k prs,2 denotes the index of the second reserved SL PRS resource. It is noted that the PRIV should be jointly used with the TRIV. If TRIV indicates N <M reserv , the SLPRSresourceto M reserv minus N last resources are not used, which is similar to that of the FRIV in legacy sidelink communications.

[0282] The following process is supported in the dedicated resource pool for determining positioning reference signal resources: Mreserv If = 2, then PRIV = K prs Therefore, positioning reference signal resources within the same slot are indicated by the location of the PSCCH resource, and other positioning reference signal resources are indicated by PRIV. reserv If = 3, then PRIV = k prs,1 +k prs,2 *K prs That is. M reserv This is the maximum number of reservations, indicated by upper-layer signaling. prs,1 k represents the index of the first reserved positioning reference signal resource, and k prs,2 This represents the index of the second reserved positioning reference signal resource. The corresponding English description is as follows: Support the following procedure of determining the SL PRS resources within the dedicated resource pool: If M reserv is 2,PRIV=k prs .ie, SL PRS resource within the same slot is indicated by the position of PSCCH resource, and the other is indicated by the PRIV. If M reserv is 3, PRIV = k prs,1 +k prs,2 *K prs . M reserv is the maximum reserve number indicated by high layer signaling, k prs,1 denotes the index of the first reserved SL PRS resource and k prs,2 denotes the index of the second reserved SL PRS resource.

[0283] Optionally, the positioning reference signal resource in the current slot where the SCI is located may also be indicated by using the SCI. Thus, the maximum number of reserved positioning reference signal resources is M reserv When that is the case,

number

number

[0284] Optionally, the positioning reference signal resource in the current slot where the SCI is located may also be indicated by using the SCI. Thus, the maximum number of reserved positioning reference signal resources is M reserv When that is the case,

number

number

[0285] Optional: Positioning reference signal resource indicator value (PRIV), that is, the value of the Positioning Reference Signal Resource Assignment (SL-PRS resource assignment) field may indicate the positioning reference signal resource in each slot. Optionally, M reserv If = 2, then PRIV = K prs,1 +k prs,2 *K prs This indicates that reference signal resources in two slots are indicated, or PRIV=K prs,1 This indicates that a reference signal resource within one slot is being indicated. reserv If = 3, then PRIV = k prs,1 +k prs,2 *K prs + kprs,3 *(K prs ) 2 This indicates that the reference signal resources in the three slots are indicated, or PRIV=K prs,1 This indicates that a reference signal resource within one slot is being indicated, or PRIV=K prs,1 +k prs,2 *K prs This indicates that reference signal resources in two slots are being pointed to. prs,1 k represents the index of the first reserved positioning reference signal resource, or the index of the positioning reference signal resource in the first reserved slot. prs,2 k represents the index of the second reserved positioning reference signal resource, or the index of the positioning reference signal resource in the second reserved slot. prs,3 This represents the index of the third reserved positioning reference signal resource, or the index of the positioning reference signal resource in the third reserved slot.

[0286] Optionally, the positioning reference signal resource in the current slot where the SCI is located may also be indicated by the SCI. Thus, the maximum number of reserved positioning reference signal resources is M reserv When that is the case,

number

number

number

[0287] Optionally, the positioning reference signal resource in the current slot where the SCI is located may also be indicated by using the SCI. Thus, the maximum number of reserved positioning reference signal resources is M reserv When that is the case, the total is

number

number

number

[0288] Optionally, the embodiment shown in Figure 6 further includes step 601a. ​​Step 601a may be performed before step 601.

[0289] 601a: The third communication device transmits configuration information to the first communication device. The configuration information is for configuring P pre-configured positioning reference signal resources. Correspondingly, the first communication device receives configuration information from the third communication device.

[0290] Optionally, the third communication device may be a network device. For example, the third communication device is an access network device. For the configuration of the positioning reference signal resources, refer to the relevant explanations of the technical terms above.

[0291] For example, as shown in Figure 4, the first communication device may be a terminal device 401, and the third communication device may be an access network device 403. The access network device 403 may transmit configuration information to the terminal device 401. In this case, the terminal device 401 receives the configuration information and determines P pre-configured positioning reference signal resources based on the configuration information. Thus, the terminal device 401 then selects a reserved positioning reference signal resource from the P pre-configured positioning reference signal resources.

[0292] Optionally, configuration information can be RRC messages, DCI, or media access control elements. (M It may be transported by AC CE. This is not particularly limited in this application.

[0293] It should be noted that the third communication device may configure P pre-configured positioning reference signal resources based on actual requirements and update P pre-configured positioning reference signal resources for the first communication device. For example, the third communication device initially configures positioning reference signal resources 1 to 4 shown in Figure 8 for the first communication device. However, in subsequent positioning processes, the third communication device may update the configured positioning reference signal resources to improve positioning accuracy and avoid interference between signals. For example, the third communication device may configure positioning reference signal resource 1 and positioning reference signal resource 2 shown in Figure 9 for the first communication device. Alternatively, the third communication device may configure positioning reference signal resource 1 and positioning reference signal resource 3 shown in Figure 8 for the first communication device, i.e., deactivate positioning reference signal resource 2 and positioning reference signal resource 4.

[0294] In the technical solution of this application, the granularity of resource reservations performed by the terminal device is: Positioning The reference signal resources, P of which are pre-configured, can be flexibly configured in a pre-configured manner. Compared to a solution in which subchannels are reserved from subchannels that are included in the entire bandwidth, the technical solution of this application has greater flexibility, higher positioning accuracy, and greater practicality.

[0295] Optionally, the embodiment shown in Figure 6 further includes step 601b. Step 601b may be performed before step 601.

[0296] 601b: The third communication device transmits a DCI to the first communication device. Correspondingly, the first communication device receives a DCI from the third communication device.

[0297] DCI instructs the first communication device to reserve M positioning reference signal resources.

[0298] Optionally, the DCI includes a third field, which instructs the first communication device to reserve M positioning reference signal resources. The third field is similar to the first field. For further details, see the related description of the first field above.

[0299] Optionally, DCI further instructs the first communication device to reserve N time units.

[0300] For example, as shown in Figure 4, the first communication device may be a terminal device 401, and the third communication device may be an access network device 403. The access network device 403 may transmit a DCI to the terminal device 401. The DCI instructs the first communication device to reserve M positioning reference signal resources and N time units.

[0301] In a possible implementation, the third field further instructs the first communication device to reserve N time units. In other words, the third field instructs the first communication device to reserve M positioning reference signal resources and N time units.

[0302] In other possible implementations, the DCI further includes a fourth field, which instructs the first communication device to reserve N time units. The fourth field is similar to the second field. For further details, see the related description of the second field above.

[0303] There is no fixed execution order between steps 601a and 601b, which is optional. Depending on the circumstances, step 601a may be executed before step 601b, or steps 601a and 601b may be executed simultaneously. This is not particularly limited in this application.

[0304] 602: The first communication device transmits an SCI to the second communication device. Correspondingly, the second communication device receives an SCI from the first communication device.

[0305] For example, the first communication device is the first terminal device, and the second communication device is the second terminal device. The first terminal device transmits SCI to the second terminal device. In this way, the second terminal device may decide that the first terminal device will transmit positioning reference signals on M positioning reference signal resources corresponding to N time units.

[0306] Specifically, the first terminal device may broadcast the SCI. In this way, other terminal devices in the sidelink communication system know the specific slot that the first terminal device reserves for a particular positioning reference signal resource. The other terminal devices may avoid the positioning reference signal resource reserved by the first terminal device to avoid conflict or collision.

[0307] With respect to the first communication device, before each transmission of a positioning reference signal, the first communication device may transmit an SCI to indicate one or more specific positioning reference signal resources corresponding to a particular time unit in which the first communication device transmits the positioning reference signal. For example, as shown in Figure 7, the first communication device transmits an SCI1, which instructs the first communication device to transmit a positioning reference signal on positioning reference signal resource 1 in slot 1, positioning reference signal resource 3 in slot 12, and positioning reference signal resource 2 in slot 15. The first communication device then transmits a positioning reference signal on positioning reference signal resource 1 in slot 1. The first communication device may also transmit an SCI2, which instructs the first communication device to transmit a positioning reference signal on positioning reference signal resource 3 in slot 12, positioning reference signal resource 15 in slot 15, and positioning reference signal resource 2 in slot 20.

[0308] 603: The second communication device 、S Based on the CI, a positioning reference signal is received from the first communication device.

[0309] Specifically, as shown in Figure 7, the first communication device may transmit a positioning reference signal on positioning reference signal resource 1 in slot 1, positioning reference signal resource 3 in slot 12, and positioning reference signal resource 2 in slot 15. The second communication device may receive the positioning reference signal transmitted by the first communication device on positioning reference signal resource 1 in slot 1, positioning reference signal resource 3 in slot 12, and positioning reference signal resource 2 in slot 15. The second communication device may then perform sidelink positioning and / or ranging for the first communication device based on the positioning reference signal. In this way, sidelink positioning and / or ranging between the first communication device and the second communication device is realized.

[0310] In this embodiment of the application, the first communication device determines an SCI for indicating or reserving M positioning reference signal resources, where the M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers greater than or equal to 1. The N time units contain P pre-configured positioning reference signal resources, or the resource pool in which the N time units are located contains P pre-configured positioning reference signal resources. The M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, where P is an integer greater than or equal to 1. The first communication device then transmits the SCI to the second communication device. The granularity of resource reservations performed by the terminal device is reference signal resources, and it can be seen that the P pre-configured positioning reference signal resources may be flexibly configured in a pre-configuration manner. This helps to improve the flexibility of reserving positioning reference signal resources by the first communication device and reduce the complexity of reserving resources by the first communication device. The second communication device may, based on SCI, decide that the first communication device transmits positioning reference signals on M positioning reference signal resources within N time units. In this way, the second communication device receives the positioning reference signals transmitted by the first communication device on the corresponding time-frequency resources, thereby realizing side-link positioning between the first and second communication devices.

[0311] A first communication device provided in embodiments of this application is described below. Refer to Figure 13. Figure 13 is a diagram of the structure of the first communication device according to embodiments of this application. The first communication device may be configured to perform steps performed by the first communication device in the embodiment shown in Figure 6. Refer to the relevant description in the embodiments of the method described above for further details.

[0312] The first communication device 1300 includes a transceiver module 1301 and a processing module 1302.

[0313] The transceiver module 1301 may implement corresponding communication functions. The transceiver module 1301 may also be called a communication interface or communication unit. The processing module 1302 is configured to perform processing operations.

[0314] Optionally, the first communication device 1300 may further include a storage module. The storage module may be configured to store instructions and / or data. The processing module 1302 may read instructions and / or data from the storage module, thereby enabling the communication device to implement an embodiment of the method shown in Figure 6.

[0315] The first communication device 1300 may be configured to perform operations performed by the first communication device in the embodiment of the method described above. The first communication device 1300 may be the first communication device, or a component that may be located in the first communication device. The transceiver module 1301 is configured to perform reception-related operations on the first communication device side in the embodiment of the method described above, and the processing module 1302 is configured to perform processing-related operations on the first communication device side in the embodiment of the method described above.

[0316] Optionally, the transceiver module 1301 may include a transmit module and a receive module. The transmit module is configured to perform the transmit operation of the first communication device in the embodiment of the method shown in Figure 6. The receive module is configured to perform the receive operation of the first communication device in the embodiment of the method shown in Figure 6.

[0317] It should be noted that the first communication device 1300 includes a transmitting module but does not necessarily include a receiving module. Alternatively, the first communication device 1300 may include a receiving module but not a transmitting module. This may be specifically determined depending on whether the above solution performed by the first communication device 1300 includes transmitting and receiving operations. The first communication device 1300 may perform the following solutions:

[0318] The processing module 1302 is configured to determine the SCI, which is used to indicate or reserve M positioning reference signal resources, where M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers greater than or equal to 1, where N time units contain P pre-configured positioning reference signal resources, or where the resource pool in which N time units are located contains P pre-configured positioning reference signal resources, and M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, where P is an integer greater than or equal to 1. The transceiver module 1301 is configured to transmit the SCI to a second communication device.

[0319] In possible implementations, SCI is used to further specify or reserve N time units.

[0320] In other possible implementations, the SCI includes a first field, which is used to indicate or reserve M positioning reference signal resources.

[0321] In other possible implementations, the length of the first field is determined based on the maximum number of time units that can be indicated or reserved by the SCI or the maximum number of positioning reference signal resources that can be indicated or reserved by the SCI.

[0322] In other possible implementations, when N time units contain P pre-configured positioning reference signal resources, each time unit contains the same number of pre-configured positioning reference signal resources. The length of the first field is determined based on the maximum number of time units that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in each time unit, or the length of the first field is determined based on the maximum number of positioning reference signal resources that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in each time unit.

[0323] In other possible implementations, when a resource pool containing N time units includes P pre-configured positioning reference signal resources, the N time units belong to the same resource pool. The length of the first field is determined based on the maximum number of time units that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in the resource pool, or the length of the first field is determined based on the maximum number of positioning reference signal resources that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in the resource pool.

[0324] In other possible implementations, the length of the first field is subject to the following conditions, namely:

number

[0325]

number

number

number

number

[0326] In other possible implementations, the length of the first field is subject to the following conditions, namely:

number

[0327]

number

number

number

number

[0328] In other possible implementations, the length of the first field is subject to the following conditions, namely:

number

[0329] N slprs k represents the number of pre-configured positioning reference signal resources included in each time unit, reserve k0 represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field. k0 is an integer greater than or equal to 1. k1 is an integer greater than or equal to 0, or k1 is determined according to the system coefficient. For example, k1=k0, k1=k reserve Or k1=N slprs That is the case.

[0330] In other possible implementations, the length of the first field is subject to the following conditions, namely:

number

[0331] N slprs k represents the number of pre-configured positioning reference signal resources included in each time unit, reserve k0 represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field. k0 is an integer greater than or equal to 1, and a is an integer greater than or equal to 0. In possible realizations, a=0 or a=1. In other possible realizations, a=k0, a=kreserve Or k1=N slprs That is the case.

[0332] In other possible implementations, the length of the first field is subject to the following conditions, namely:

number

[0333] Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and k reserve k0 represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field. k0 is an integer greater than or equal to 1, k1 is an integer greater than or equal to 0, or k1 is determined according to the system coefficient. For example, k1=k0, k1=k reserve Alternatively, k1 = Q.

[0334] In other possible implementations, the length of the first field is subject to the following conditions, namely:

number

[0335] Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and k reserve k0 represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field. k0 is an integer greater than or equal to 1, and a is an integer greater than or equal to 0. In possible realizations, a=0 or a=1. In other possible realizations, a=k0, a=k reserve Alternatively, k1 = Q.

[0336] In other possible implementations, the length of the first field is 4W bits, where W is an integer greater than or equal to 1.

[0337] In other possible implementations, the length of the first field is 4 bits, 8 bits, or 12 bits.

[0338] In other possible implementations, when the SCI is intended to indicate or reserve only positioning reference signal resources within a single time unit, the length of the first field is 4 bits, When SCI is used to indicate or reserve positioning reference signal resources within two time units, the length of the first field is 8 bits, or When the SCI is used to indicate or reserve positioning reference signal resources within three time units, the length of the first field is 12 bits.

[0339] In other possible implementations, the length of the first field is 8 bits, the four most significant bits in the first field indicate the positioning reference signal resource in the first of two time units, and the four least significant bits in the first field indicate the positioning reference signal in the second of two time units. resource Give instructions.

[0340] In other possible implementations, k reserve This is indicated by RRC signaling. For example, in possible implementations, k reserve This is indicated by using information elements in the configuration signaling related to the sidelink resource pool within the RRC signaling. For example, k reserve This is indicated by using the MaxNumPerReserve (sl-MaxNumPerReserve) information element in the configuration signaling related to the sidelink resource pool within the RRC signaling.

[0341] In other possible implementations, the formula for calculating the length of the first field may indicate that the length of the first field relates to the maximum number of resources or time units that can be indicated in each sidelink control signaling transmission.

[0342] In other possible implementations, the formula for calculating the length of the first field is: reserve k of the positioning reference signal resources reserve -It may be indicated that only k0 positioning reference signal resources need to be indicated. The other k0 positioning reference signal resources are indicated in other ways. For example, the k0 positioning reference signal resources are indicated by using frequency-domain or time-domain position information of the PSCCH carrying control signaling (e.g., SCI). Optionally, frequency-domain position information includes a start frequency or bandwidth. The start frequency includes the start RB, start subchannel, and any other frequency-related information. The bandwidth includes the bandwidth size, e.g., the number of RBs, the number of subchannels, or the number of REs. The time-domain position information includes information such as slots, start symbols, subframes, and / or frames.

[0343] In other possible implementations, the value of the first field is given by the following condition: I1 + I2 × N slprs +…I N × (N slprs ) N-1 Or I1 + I2 × N slprs +…I N × (N slprs ) N-1 Satisfying +Y. I1 represents the index of the positioning reference signal resource in the first of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second of the N time units indicated or reserved by the SCI, and I N is the index of the positioning reference signal resource within the Nth time unit out of N time units designated or reserved by SCI, where N slprsrepresents the number of pre-configured positioning reference signal resources included in each time unit, and the index of the pre-configured positioning reference signal resources included in each of the N time units is encoded from 0. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0344] In other possible implementations, the value of the first field is given by the following condition: I1 + I2 × N slprs +…I N × (N slprs ) N-1 -1 or I1 + I2 × N slprs +…I N × (N slprs ) N-1 -1+Y is satisfied. I1 represents the index of the positioning reference signal resource in the first of the N time units indicated or reserved by SCI, I2 represents the index of the positioning reference signal resource in the second of the N time units indicated or reserved by SCI, and I N is the index of the positioning reference signal resource within the Nth time unit out of N time units designated or reserved by SCI, where N slprs represents the number of pre-configured positioning reference signal resources included in each time unit, and the index of the pre-configured positioning reference signal resources included in each of the N time units is encoded from 1. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0345] In other possible implementations, the value of the first field is given by the following condition: I1 + I2 × Q + ...I N ×(Q) N-1 Or I1 + I2 × Q + ...I N ×(Q) N-1Satisfying +Y. I1 represents the index of the positioning reference signal resource in the first of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second of the N time units indicated or reserved by the SCI, and I N Q is the index of the positioning reference signal resource within the Nth time unit out of N time units indicated or reserved by SCI, Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and the indices of the pre-configured positioning reference signal resources included in the resource pool are encoded from 0. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0346] In other possible implementations, the value of the first field is given by the following condition: I1 + I2 × Q + ...I N ×(Q) N-1 -1 or I1 + I2 × Q + ...I N ×(Q) N-1 -1+Y is satisfied. I1 represents the index of the positioning reference signal resource in the first of the N time units indicated or reserved by SCI, I2 represents the index of the positioning reference signal resource in the second of the N time units indicated or reserved by SCI, and I N Q is the index of the positioning reference signal resource within the Nth time unit out of N time units indicated or reserved by SCI, Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and the indices of the pre-configured positioning reference signal resources included in the resource pool are encoded from 1. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0347] In other possible implementations, the SCI includes a first field, which is used to indicate or reserve M positioning reference signal resources and N time units.

[0348] In other possible implementations, the frequency bands occupied by different positioning reference signal resources among the P pre-configured positioning reference signal resources have overlapping portions.

[0349] In other possible implementations, each of the P pre-configured positioning reference signal resources occupies part or all of the bandwidth of the resource pool.

[0350] In other possible implementations, when N time units contain P pre-configured positioning reference signal resources, the configuration of the pre-configured positioning reference signal resources contained in different time units is the same.

[0351] In other possible implementations, the transceiver module 1301 is further configured to receive DCI from a third communication device, which instructs the first communication device 1300 to reserve M positioning reference signal resources.

[0352] In other possible implementations, DCI further instructs the first communication device 1300 to reserve N time units.

[0353] In other possible implementations, the transceiver module 1301 is further configured to receive configuration information from a third communication device, the configuration information being used to configure P pre-configured positioning reference signal resources.

[0354] In other possible implementations, the SCI further includes a second field, which is used to reserve N time units.

[0355] In other possible implementations, the length of the second field is determined based on the maximum number of time units that can be indicated or reserved by the SCI or the maximum number of positioning reference signal resources that can be indicated or reserved by the SCI.

[0356] In other possible implementations, when N time units contain two slots, the length of the second field is 5 bits, or when N time units contain three slots, the length of the second field is 9 bits.

[0357] In other possible implementations, when N time units contain P pre-configured positioning reference signal resources, different pre-configured positioning reference signal resources contained in each time unit satisfy a frequency division multiplexing relationship on the same time domain resource; or when N time units contain P pre-configured positioning reference signal resources, different pre-configured positioning reference signal resources contained in each time unit satisfy a time division multiplexing relationship on the same frequency domain resource; or when N time units contain P pre-configured positioning reference signal resources, in each time unit, positioning reference signal resources occupying the same time domain resource satisfy a frequency division multiplexing relationship on the same time domain resource, and positioning reference signal resources occupying the same frequency domain resource satisfy a time division multiplexing relationship on the same frequency domain resource.

[0358] A second communication device provided in embodiments of this application is described below. Refer to Figure 14. Figure 14 is a diagram of the structure of the second communication device according to embodiments of this application. The second communication device may be configured to perform steps performed by the second communication device in the embodiment shown in Figure 6. Refer to the relevant description in the embodiments of the method described above for further details.

[0359] The second communication device 1400 includes a transceiver module 1401. Optionally, the second communication device 1400 further includes a processing module 1402.

[0360] The transceiver module 1401 may implement corresponding communication functions. The transceiver module 1401 may also be called a communication interface or communication unit. The processing module 1402 is configured to perform processing operations.

[0361] Optionally, the second communication device 1400 may further include a storage module. The storage module may be configured to store instructions and / or data. The processing module 1402 may read instructions and / or data from the storage module, thereby enabling the communication device to implement an embodiment of the method shown in Figure 6.

[0362] The second communication device 1400 may be configured to perform operations performed by the second communication device in the embodiment of the method described above. The second communication device 1400 may be the second communication device, or a component that may be located in the second communication device. The transceiver module 1401 is configured to perform reception-related operations on the second communication device side in the embodiment of the method described above, and the processing module 1402 is configured to perform processing-related operations on the second communication device side in the embodiment of the method described above.

[0363] Optionally, the transceiver module 1401 may include a transmit module and a receive module. The transmit module is configured to perform the transmit operation of the second communication device in the embodiment of the method shown in Figure 6. The receive module is configured to perform the receive operation of the second communication device in the embodiment of the method shown in Figure 6.

[0364] It should be noted that the second communication device 1400 includes a transmitting module but does not necessarily include a receiving module. Alternatively, the second communication device 1400 may include a receiving module but not a transmitting module. This may be specifically determined depending on whether the above solution performed by the second communication device 1400 includes transmitting and receiving operations. The second communication device 1400 may perform the following solutions:

[0365] The transceiver module 1401 is configured to receive an SCI from a first communication device, where the SCI is for indicating or reserving M positioning reference signal resources, where the M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers greater than or equal to 1, where the N time units contain P pre-configured positioning reference signal resources, or where the resource pool in which the N time units are located contains P pre-configured positioning reference signal resources, where the M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer greater than or equal to 1, and is configured to receive positioning reference signals from the first communication device based on the SCI.

[0366] In possible implementations, SCI is used to further specify or reserve N time units.

[0367] In other possible implementations, the SCI includes a first field, which is used to indicate or reserve M positioning reference signal resources.

[0368] In other possible implementations, the length of the first field is determined based on the maximum number of time units that can be indicated or reserved by the SCI or the maximum number of positioning reference signal resources that can be indicated or reserved by the SCI.

[0369] In other possible implementations, when N time units contain P pre-configured positioning reference signal resources, each time unit contains the same number of pre-configured positioning reference signal resources, and the length of the first field is determined based on the maximum number of time units that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in each time unit, or the length of the first field is determined based on the maximum number of positioning reference signal resources that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in each time unit.

[0370] In other possible implementations, when a resource pool containing N time units includes P pre-configured positioning reference signal resources, the N time units belong to the same resource pool. The length of the first field is determined based on the maximum number of time units that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in the resource pool, or the length of the first field is determined based on the maximum number of positioning reference signal resources that can be instructed or reserved by the SCI and the number of pre-configured positioning reference signal resources included in the resource pool.

[0371] In other possible implementations, the length of the first field is subject to the following conditions, namely:

number

number

number

number

number

[0372] In other possible implementations, the length of the first field is subject to the following conditions, namely:

number

number

number

number

number

[0373] In other possible implementations, the length of the first field is subject to the following conditions, namely:

number

[0374] N slprs k represents the number of pre-configured positioning reference signal resources included in each time unit, reserve k0 represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field. k0 is an integer greater than or equal to 1. k1 is an integer greater than or equal to 0, or k1 is determined according to the system coefficient. For example, k1=k0, k1=k reserve Or k1=N slprs That is the case.

[0375] In other possible implementations, the length of the first field is subject to the following conditions, namely:

number

[0376] N slprs k represents the number of pre-configured positioning reference signal resources included in each time unit, reserve k0 represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field. k0 is an integer greater than or equal to 1, and a is an integer greater than or equal to 0. In possible realizations, a=0 or a=1. In other possible realizations, a=k0, a=k reserve Or k1=N slprs That is the case.

[0377] In other possible implementations, the length of the first field is subject to the following conditions, namely:

number

[0378] Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and k reservek1=k0, k1=k reserve Alternatively, k1 = Q.

[0379] In other possible implementations, the length of the first field is subject to the following conditions, namely:

number

[0380] Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and k reserve k0 represents the maximum number of positioning reference signal resources that can be indicated by the SCI, the maximum number of time units that can be indicated by the SCI, or the maximum number of positioning reference signal resources that can be indicated by the first field. k0 is an integer greater than or equal to 1, and a is an integer greater than or equal to 0. In possible realizations, a=0 or a=1. In other possible realizations, a=k0, a=k reserve Alternatively, k1 = Q.

[0381] In other possible implementations, the length of the first field is 4W bits, where W is an integer greater than or equal to 1.

[0382] In other possible implementations, the length of the first field is 4 bits, 8 bits, or 12 bits.

[0383] In other possible implementations, when the SCI is intended to indicate or reserve only positioning reference signal resources within a single time unit, the length of the first field is 4 bits, When SCI is used to indicate or reserve positioning reference signal resources within two time units, the length of the first field is 8 bits, or When the SCI is used to indicate or reserve positioning reference signal resources within three time units, the length of the first field is 12 bits.

[0384] In other possible implementations, the length of the first field is 8 bits, the four most significant bits in the first field indicate the positioning reference signal resource in the first of two time units, and the four least significant bits in the first field indicate the positioning reference signal in the second of two time units. resource Give instructions.

[0385] In other possible implementations, k reserve This is indicated by RRC signaling. For example, in possible implementations, k reserve This is indicated by using information elements in the configuration signaling related to the sidelink resource pool within the RRC signaling. For example, k reserve This is indicated by using the MaxNumPerReserve (sl-MaxNumPerReserve) information element in the configuration signaling related to the sidelink resource pool within the RRC signaling.

[0386] In other possible implementations, the formula for calculating the length of the first field may indicate that the length of the first field relates to the maximum number of resources or time units that can be indicated in each sidelink control signaling transmission.

[0387] In other possible implementations, the formula for calculating the length of the first field is: reserve k of the positioning reference signal resources reserve-It may be indicated that only k0 positioning reference signal resources need to be indicated. The other k0 positioning reference signal resources are indicated in other ways. For example, the k0 positioning reference signal resources are indicated by using frequency-domain or time-domain position information of the PSCCH carrying control signaling (e.g., SCI). Optionally, the frequency-domain position information includes a start frequency or bandwidth. The start frequency is: start This includes RB, start subchannel, and any other frequency-related information. Bandwidth includes bandwidth size, e.g., the number of RBs, the number of subchannels, or the number of REs. Time-domain position information includes information such as slots, start symbols, subframes, and / or frames.

[0388] In other possible implementations, the value of the first field is given by the following condition: I1 + I2 × N slprs +…I N × (N slprs ) N-1 Or I1 + I2 × N slprs +…I N × (N slprs ) N-1 Satisfying +Y.

[0389] I1 represents the index of the positioning reference signal resource within the first of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource within the second of the N time units indicated or reserved by the SCI, and I N is the index of the positioning reference signal resource within the Nth time unit out of N time units designated or reserved by SCI, where N slprs represents the number of pre-configured positioning reference signal resources included in each time unit, and the index of the pre-configured positioning reference signal resources included in each of the N time units is encoded from 0. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0390] In other possible implementations, the value of the first field is given by the following condition: I1 + I2 × N slprs +…I N × (N slprs ) N-1 -1 or I1 + I2 × N slprs +…I N × (N slprs ) N-1 -1+Y is satisfied. I1 represents the index of the positioning reference signal resource in the first of the N time units indicated or reserved by SCI, I2 represents the index of the positioning reference signal resource in the second of the N time units indicated or reserved by SCI, and I N is the index of the positioning reference signal resource within the Nth time unit out of N time units designated or reserved by SCI, where N slprs represents the number of pre-configured positioning reference signal resources included in each time unit, and the index of the pre-configured positioning reference signal resources included in each of the N time units is encoded from 1. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0391] In other possible implementations, the value of the first field is given by the following condition: I1 + I2 × Q + ...I N ×(Q) N-1 Or I1 + I2 × Q + ...I N ×(Q) N-1 Satisfying +Y. I1 represents the index of the positioning reference signal resource in the first of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second of the N time units indicated or reserved by the SCI, and I NQ is the index of the positioning reference signal resource within the Nth time unit out of N time units indicated or reserved by SCI, Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and the indices of the pre-configured positioning reference signal resources included in the resource pool are encoded from 0. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0392] In other possible implementations, the value of the first field is given by the following condition: I1 + I2 × Q + ...I N ×(Q) N-1 -1 or I1 + I2 × Q + ...I N ×(Q) N-1 -1+Y is satisfied. I1 represents the index of the positioning reference signal resource in the first of the N time units indicated or reserved by SCI, I2 represents the index of the positioning reference signal resource in the second of the N time units indicated or reserved by SCI, and I N Q is the index of the positioning reference signal resource within the Nth time unit out of N time units indicated or reserved by SCI, Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and the indices of the pre-configured positioning reference signal resources included in the resource pool are encoded from 1. Y is a constant, which is either predefined or obtained through computation. Optionally, Y may be equal to a natural number such as 0, 1, 2, or 3. Alternatively, optionally, Y may be an integer, such as -1, -2, -3, 0, 1, 2, 3, etc.

[0393] In other possible implementations, the SCI includes a first field, which is used to indicate or reserve M positioning reference signal resources and N time units.

[0394] In other possible implementations, the frequency bands occupied by different positioning reference signal resources among the P pre-configured positioning reference signal resources have overlapping portions.

[0395] In other possible implementations, each of the P pre-configured positioning reference signal resources occupies part or all of the bandwidth of the resource pool.

[0396] In other possible implementations, when N time units contain P pre-configured positioning reference signal resources, the configuration of the pre-configured positioning reference signal resources contained in different time units is the same.

[0397] In other possible implementations, the SCI further includes a second field, which is used to reserve N time units.

[0398] In other possible implementations, the length of the second field is determined based on the maximum number of time units that can be indicated or reserved by the SCI or the maximum number of positioning reference signal resources that can be indicated or reserved by the SCI.

[0399] In other possible implementations, when N time units contain two slots, the length of the second field is 5 bits, or when N time units contain three slots, the length of the second field is 9 bits.

[0400] In other possible implementations, when N time units contain P pre-configured positioning reference signal resources, different pre-configured positioning reference signal resources contained in each time unit satisfy a frequency division multiplexing relationship on the same time domain resource; or when N time units contain P pre-configured positioning reference signal resources, different pre-configured positioning reference signal resources contained in each time unit satisfy a time division multiplexing relationship on the same frequency domain resource; or when N time units contain P pre-configured positioning reference signal resources, in each time unit, positioning reference signal resources occupying the same time domain resource satisfy a frequency division multiplexing relationship on the same time domain resource, and positioning reference signal resources occupying the same frequency domain resource satisfy a time division multiplexing relationship on the same frequency domain resource.

[0401] Figure 15 shows possible configurations of the first or second communication device as a terminal device.

[0402] Figure 15 is a simplified diagram of the structure of a terminal device. For ease of understanding and illustration, an example of a mobile phone is used in Figure 15. As shown in Figure 15, the terminal device includes a processor, memory, radio frequency circuitry, antenna, and input / output devices.

[0403] The processor is primarily configured to process communication protocols and data, control terminal devices, execute software programs, and process data within those software programs. Memory is primarily configured to store software programs and data.

[0404] Radio frequency circuits are primarily configured to perform conversions between baseband signals and radio frequency signals, and to process radio frequency signals.

[0405] Antennas are primarily configured to receive and transmit radio frequency signals in the form of electromagnetic waves.

[0406] Input / output devices such as touchscreens, displays, or keyboards are primarily configured to receive data entered by the user and output data to the user.

[0407] It should be noted that some types of terminal devices do not require input / output devices.

[0408] When data needs to be transmitted, the processor performs baseband processing on the data to be transmitted, then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit then performs radio frequency processing on the baseband signal and transmits the radio frequency signal externally in the form of electromagnetic waves through the antenna. When data is transmitted to a terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal back into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal back into data and processes the data.

[0409] For the sake of clarity, Figure 15 shows only one memory and one processor. In actual terminal device products, there may be one or more processors and one or more memories. Memory may also be called a storage medium, storage device, etc. Memory may be located independently of the processor or integrated with the processor. This is not limited to the embodiments of this application.

[0410] In this embodiment of this application, the antenna and radio frequency circuit having transceiver functionality may be considered as a transceiver unit of a terminal device, and the processor having processing functionality may be considered as a processing unit of a terminal device. As shown in Figure 15, the terminal device includes a transceiver unit 1510 and a processing unit 1520. The transceiver unit may also be called a transceiver, transceiver machine, transceiver device, etc. The processing unit may also be called a processor, processing board, processing module, processing device, etc.

[0411] Optionally, a component configured to implement the receiving function within the transceiver unit 1510 may be considered a receiving unit, and a component configured to implement the transmitting function within the transceiver unit 1510 may be considered a transmitting unit. In other words, the transceiver unit 1510 includes a receiving unit and a transmitting unit. The transceiver unit may also be referred to as a transceiver machine, transceiver, transceiver circuit, etc., depending on the circumstances. The receiving unit may also be referred to as a receiving machine, receiver, receiving circuit, etc., depending on the circumstances. The transmitting unit may also be referred to as a transmitting machine, transmitter, transmitting circuit, etc., depending on the circumstances.

[0412] It should be understood that the transceiver unit 1510 is configured to perform the transmission and reception operations of the first or second communication device in the embodiment of the above method, and the processing unit 1520 is configured to perform operations other than the transmission and reception operations of the first or second communication device in the embodiment of the above method.

[0413] When the first or second communication device is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit or a communication interface. The processing unit is a processor, microprocessor, integrated circuit, or logic circuit integrated on the chip.

[0414] This application further provides a communication device. Figure 16 is another diagram showing the structure of a communication device according to an embodiment of this application. The communication device may be configured to perform steps performed by the first or second communication device in the embodiment shown in Figure 6. For further details, refer to the relevant description in the embodiments of the above method.

[0415] The communication device includes a processor 1601. Optionally, the communication device further includes a memory 1602 and a transceiver 1603.

[0416] In a possible implementation, the processor 1601, memory 1602, and transceiver 1603 are connected separately via a bus, and the memory stores computer instructions.

[0417] Optionally, the processing module 1302 in the above embodiment may specifically be the processor 1601 in this embodiment. Therefore, the specific implementation method of the processor 1601 will not be described again. The transceiver module 1301 in the above embodiment may specifically be the transceiver 1603 in this embodiment. Therefore, the specific implementation method of the transceiver 1603 will not be described again.

[0418] Optionally, the processing module 1402 in the above embodiment may specifically be the processor 1601 in this embodiment. Therefore, the specific implementation method of the processor 1601 will not be described again. The transceiver module 1401 in the above embodiment may specifically be the transceiver 1603 in this embodiment. Therefore, the specific implementation method of the transceiver 1603 will not be described again.

[0419] Embodiments of this application further provide a communication system comprising a first communication device and a second communication device. The first communication device is configured to perform all or part of the steps performed by the first communication device in the embodiment shown in Figure 6. The second communication device is configured to perform all or part of the steps performed by the second communication device in the embodiment shown in Figure 6.

[0420] Embodiments of this application further provide a computer program product including instructions. When the computer program product is executed on a computer, the computer becomes capable of performing the method in the embodiment shown in Figure 6.

[0421] Embodiments of this application further provide a computer-readable storage medium containing computer instructions. When the computer instructions are executed on a computer, the computer becomes capable of performing the method in the embodiment shown in Figure 6.

[0422] Embodiments of this application further provide a chip device including a processor configured to connect to memory and call a program stored in memory, thereby causing the processor to perform the method in the embodiment shown in Figure 6.

[0423] Any of the above processors are general-purpose central processing units, microprocessors, or application-specific integrated circuits. (A The memory referred to above is read-only memory. (R OM), other types of static storage devices capable of storing static information and instructions, random access memory (R AM) etc. is also acceptable.

[0424] For the purpose of convenience and concise explanation, it will be readily apparent to those skilled in the art that the detailed operating processes of the above systems, apparatuses, and units will not be described again here, but will be referred to by the corresponding processes in the embodiments of the above methods.

[0425] In some embodiments provided in this application, it should be understood that the systems, apparatus and methods disclosed may be implemented in other ways. For example, the embodiments of the apparatus described above are merely examples. For example, the division of units is merely a logical functional division and may be other divisions in the actual implementation. For example, multiple units or components may be combined or integrated into other systems, or some features may be ignored or not performed. Furthermore, the mutual coupling, direct coupling or communication connection indicated or discussed may be implemented by using some interfaces. Indirect coupling or communication connection between apparatus or units may be implemented electronically, mechanically or in other forms.

[0426] Units described as separate parts may or may not be physically separate, and parts shown as units may or may not be physical units, may be located in one place, or may be distributed across multiple network units. Some or all of the units may be selected based on the actual requirements to achieve the objectives of the solution of the embodiment.

[0427] Furthermore, the functional units in the embodiments of this application may be integrated into a single processing unit, each unit may exist physically independently, or two or more units may be integrated into a single unit. The integrated unit may be implemented in hardware form or in the form of a software functional unit.

[0428] When an integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, the integrated unit may be stored on a computer-readable storage medium. Based on this understanding, the technical solution of this application may be implemented in essence, or in part, of the prior art, or all or part of the technical solution may be implemented in the form of a software product. A computer software product is stored on a storage medium and includes several instructions for instructing a computer device (which may be a personal computer, server, or network device) to perform all or part of the steps of the method described in embodiments of this application. The storage medium includes any medium capable of storing program code, such as a USB flash drive, removable hard disk, ROM, RAM, magnetic disk, or optical disk.

[0429] The embodiments described above are intended to illustrate the technical solutions of this application, rather than to limit this application. Although this application is described in detail with reference to the embodiments described above, those skilled in the art will understand the technical solutions of the embodiments of this application. range It should be understood that modifications may still be made to the technical solutions described in the above embodiments, or equivalent substitutions may be made to some of their technical features, without departing from the bounds.

Claims

1. A method for specifying resources, A first communication device determines sidelink control information (SCI), wherein the SCI indicates M positioning reference signal resources, the M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers of 1 or more, the N time units include P pre-configured positioning reference signal resources, or the resource pool in which the N time units are located includes P pre-configured positioning reference signal resources, the M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer of 1 or more, The first communication device transmits the SCI to the second communication device. Includes, The SCI includes a first field, the first field indicating the M positioning reference signal resources, A method in which the length of the first field is determined based on the maximum number of time units or positioning reference signal resources that can be indicated by the SCI. method.

2. A method for specifying resources, The steps include: receiving sidelink control information (SCI) from a first communication device by a second communication device, wherein the SCI indicates M positioning reference signal resources, the M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers of 1 or more, the N time units include P pre-configured positioning reference signal resources, or the resource pool in which the N time units are located includes P pre-configured positioning reference signal resources, the M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer of 1 or more; The second communication device receives a positioning reference signal from the first communication device based on the SCI. Includes, The SCI includes a first field, the first field indicating the M positioning reference signal resources, A method in which the length of the first field is determined based on the maximum number of time units or positioning reference signal resources that can be indicated by the SCI.

3. When the N time units include the P pre-configured positioning reference signal resources, each time unit includes the same number of pre-configured positioning reference signal resources. The length of the first field is determined based on the maximum number of time units that can be indicated by the SCI and the number of pre-configured positioning reference signal resources included in each time unit, or The method according to claim 1 or 2, wherein the length of the first field is determined based on the maximum number of positioning reference signal resources that can be indicated by the SCI and the number of pre-configured positioning reference signal resources included in each time unit.

4. When the resource pool in which the N time units are located includes the P pre-configured positioning reference signal resources, the N time units belong to the same resource pool, The length of the first field is determined based on the maximum number of time units that can be indicated by the SCI and the number of pre-configured positioning reference signal resources included in the resource pool, or The method according to claim 1 or 2, wherein the length of the first field is determined based on the maximum number of positioning reference signal resources that can be indicated by the SCI and the number of pre-configured positioning reference signal resources included in the resource pool.

5. A method for specifying resources, A first communication device determines sidelink control information (SCI), wherein the SCI indicates M positioning reference signal resources, the M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers of 1 or more, the N time units include P pre-configured positioning reference signal resources, or the resource pool in which the N time units are located includes P pre-configured positioning reference signal resources, the M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer of 1 or more, The first communication device transmits the SCI to the second communication device. Includes, The SCI includes a first field, the first field indicating the M positioning reference signal resources, The length of the first field is determined by the following conditions, namely: [Math 1] Satisfying the conditions, Here, [Math 2] teeth [Math 3] This represents rounding, [Math 4] is base 2 [Math 5] This represents calculating the logarithm of N slprs represents the number of pre-configured positioning reference signal resources included in each time unit, K reserve A method in which the maximum number of positioning reference signal resources that can be indicated by the SCI or the maximum number of time units that can be indicated by the SCI.

6. A method for specifying resources, The steps include: receiving sidelink control information (SCI) from a first communication device by a second communication device, wherein the SCI indicates M positioning reference signal resources, the M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers of 1 or more, the N time units include P pre-configured positioning reference signal resources, or the resource pool in which the N time units are located includes P pre-configured positioning reference signal resources, the M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer of 1 or more; The second communication device receives a positioning reference signal from the first communication device based on the SCI. Includes, The SCI includes a first field, the first field indicating the M positioning reference signal resources, The length of the first field is determined by the following conditions, namely: [Math 6] Satisfying the conditions, Here, [Number 7] teeth [Number 8] This represents rounding, [Number 9] is base 2 [Number 10] A method that represents calculating the logarithm of, where N slprs represents the number of the pre-configured positioning reference signal resources included in each time unit, and K reserve represents the maximum number of the positioning reference signal resources that can be indicated by the SCI or the maximum number of the time units that can be indicated by the SCI.

7. A method for specifying resources, A first communication device determines sidelink control information (SCI), wherein the SCI indicates M positioning reference signal resources, the M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers of 1 or more, the N time units include P pre-configured positioning reference signal resources, or the resource pool in which the N time units are located includes P pre-configured positioning reference signal resources, the M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer of 1 or more, The first communication device transmits the SCI to the second communication device. Includes, The SCI includes a first field, the first field indicating the M positioning reference signal resources, The length of the first field is determined by the following conditions, namely: [Math 11] Satisfying the conditions, Here, [Math 12] teeth [Number 13] This represents rounding, [Number 14] is base 2 [Number 15] This represents calculating the logarithm of, where Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and K reserve A method in which the maximum number of positioning reference signal resources that can be indicated by the SCI or the maximum number of time units that can be indicated by the SCI.

8. A method for specifying resources, The steps include: receiving sidelink control information (SCI) from a first communication device by a second communication device, wherein the SCI indicates M positioning reference signal resources, the M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers of 1 or more, the N time units include P pre-configured positioning reference signal resources, or the resource pool in which the N time units are located includes P pre-configured positioning reference signal resources, the M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer of 1 or more; The second communication device receives a positioning reference signal from the first communication device based on the SCI. Includes, The SCI includes a first field, the first field indicating the M positioning reference signal resources, The length of the first field is determined by the following conditions, namely: [Number 16] Satisfying the conditions, Here, [Number 17] teeth [Number 18] This represents rounding, [Number 19] is base 2 [Number 20] A method that represents calculating the logarithm of, where Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and K reserve represents the maximum number of positioning reference signal resources that can be indicated by the SCI or the maximum number of time units that can be indicated by the SCI.

9. A method for specifying resources, A first communication device determines sidelink control information (SCI), wherein the SCI indicates M positioning reference signal resources, the M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers of 1 or more, the N time units include P pre-configured positioning reference signal resources, or the resource pool in which the N time units are located includes P pre-configured positioning reference signal resources, the M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer of 1 or more, The first communication device transmits the SCI to the second communication device. Includes, The SCI includes a first field, the first field indicating the M positioning reference signal resources, The value of the first field satisfies the following condition, namely, I 1 +I 2 ×N slprs +…I N ×(N slprs ) N-1 where I 1 represents the index of the positioning reference signal resource within the first time unit among the N time units indicated by the SCI, I 2 represents the index of the positioning reference signal resource within the second time unit among the N time units indicated by the SCI, I N is the index of the positioning reference signal resource within the Nth time unit among the N time units indicated by the SCI, and N slprs represents the number of the pre-configured positioning reference signal resources included in each time unit, and the indices of the pre-configured positioning reference signal resources included in each of the N time units are encoded from 0, or, The value of the first field is determined by the following conditions, namely, I 1 +I 2 ×N slprs +…I N × (N slprs ) N-1 -1 is satisfied, where I 1 represents the index of the positioning reference signal resource within the first of the N time units indicated by the SCI, and I 2 represents the index of the positioning reference signal resource within the second of the N time units indicated by the SCI, and I N is the index of the positioning reference signal resource within the Nth time unit out of the N time units indicated by the SCI, where N slprs A method in which represents the number of pre-configured positioning reference signal resources included in each of the N time units, and the index of the pre-configured positioning reference signal resources included in each of the N time units is encoded from 1.

10. A method for specifying resources, The steps include: receiving sidelink control information (SCI) from a first communication device by a second communication device, wherein the SCI indicates M positioning reference signal resources, the M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers of 1 or more, the N time units include P pre-configured positioning reference signal resources, or the resource pool in which the N time units are located includes P pre-configured positioning reference signal resources, the M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer of 1 or more; The second communication device receives a positioning reference signal from the first communication device based on the SCI. Includes, The SCI includes a first field, the first field indicating the M positioning reference signal resources, The value of the first field satisfies the following condition, i.e., I 1 + I 2 × N slprs + …IN × (N slprs) N-1, where I 1 represents the index of the positioning reference signal resource in the first of the N time units indicated by the SCI, I 2 represents the index of the positioning reference signal resource in the second of the N time units indicated by the SCI, IN is the index of the positioning reference signal resource in the Nth time unit indicated by the SCI, N slprs represents the number of the pre-configured positioning reference signal resources included in each time unit, and the index of the pre-configured positioning reference signal resource included in each of the N time units is encoded from 0 or, The value of the first field satisfies the following condition, i.e., I 1 + I 2 × N slprs + …IN × (N slprs) N-1 - 1, where I 1 represents the index of the positioning reference signal resource in the first of the N time units indicated by the SCI, I 2 represents the index of the positioning reference signal resource in the second of the N time units indicated by the SCI, IN is the index of the positioning reference signal resource in the Nth time unit indicated by the SCI, N slprs represents the number of the pre-configured positioning reference signal resources included in each time unit, and the index of the pre-configured positioning reference signal resource included in each of the N time units is encoded from 1, in this method.

11. A method for specifying resources, A first communication device determines sidelink control information (SCI), wherein the SCI indicates M positioning reference signal resources, the M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers of 1 or more, the N time units include P pre-configured positioning reference signal resources, or the resource pool in which the N time units are located includes P pre-configured positioning reference signal resources, the M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer of 1 or more, The first communication device transmits the SCI to the second communication device. Includes, The SCI includes a first field, the first field indicating the M positioning reference signal resources, The value of the first field is determined by the following conditions, namely, I 1 +I 2 ×Q+…I N ×(Q) N-1 Satisfying the condition, where I 1 represents the index of the positioning reference signal resource within the first of the N time units indicated by the SCI, and I 2 represents the index of the positioning reference signal resource within the second of the N time units indicated by the SCI, and I N Q is the index of the positioning reference signal resource within the Nth time unit out of the N time units indicated by the SCI, Q represents the number of the pre-configured positioning reference signal resources included in the resource pool, and the index of the pre-configured positioning reference signal resource included in the resource pool is encoded from 0, or The value of the first field is determined by the following conditions, namely, I 1 +I 2 ×Q+…I N ×(Q) N-1 -1 is satisfied, where I 1 represents the index of the positioning reference signal resource within the first of the N time units indicated by the SCI, and I 2 represents the index of the positioning reference signal resource within the second of the N time units indicated by the SCI, and I N A method in which Q is the index of a positioning reference signal resource within the Nth time unit out of the N time units indicated by the SCI, Q represents the number of the pre-configured positioning reference signal resources included in the resource pool, and the index of the pre-configured positioning reference signal resource included in the resource pool is encoded from 1.

12. A method for specifying resources, The steps include: receiving sidelink control information (SCI) from a first communication device by a second communication device, wherein the SCI indicates M positioning reference signal resources, the M positioning reference signal resources correspond to N time units, each time unit corresponds to at least one positioning reference signal resource, and both M and N are integers of 1 or more, the N time units include P pre-configured positioning reference signal resources, or the resource pool in which the N time units are located includes P pre-configured positioning reference signal resources, the M positioning reference signal resources are some or all of the P pre-configured positioning reference signal resources, and P is an integer of 1 or more; The second communication device receives a positioning reference signal from the first communication device based on the SCI. Includes, The SCI includes a first field, the first field indicating the M positioning reference signal resources, The value of the first field satisfies the following condition, i.e., I 1 + I 2 × Q + …IN × (Q) N-1, where I 1 represents the index of the positioning reference signal resource in the first of the N time units indicated by the SCI, I 2 represents the index of the positioning reference signal resource in the second of the N time units indicated by the SCI, IN is the index of the positioning reference signal resource in the Nth time unit indicated by the SCI, Q represents the number of the pre-configured positioning reference signal resources included in the resource pool, and the index of the pre-configured positioning reference signal resource included in the resource pool is encoded from 0 or, The value of the first field satisfies the following condition, i.e., I 1 + I 2 × Q + ... IN × (Q) N-1 - 1, where I 1 represents the index of the positioning reference signal resource in the first of the N time units indicated by the SCI, I 2 represents the index of the positioning reference signal resource in the second of the N time units indicated by the SCI, IN is the index of the positioning reference signal resource in the Nth time unit indicated by the SCI, Q represents the number of the pre-configured positioning reference signal resources included in the resource pool, and the index of the pre-configured positioning reference signal resource included in the resource pool is encoded from 1, in this method.

13. The method according to claim 1, 2, 5, 6, 7, 8, 9, 10, 11, or 12, wherein each of the P pre-configured positioning reference signal resources occupies part or all of the bandwidth of the resource pool.

14. The method according to claim 1, 2, 5, 6, 7, 8, 9, 10, 11 or 12, further comprising the step of receiving downlink control information (DCI) from a third communication device via the first communication device, wherein the DCI instructs the first communication device to reserve the M positioning reference signal resources.

15. The method according to claim 1, 2, 5, 6, 7, 8, 9, 10, 11 or 12, wherein the first communication device receives configuration information from a third communication device, the configuration information being for configuring the P pre-configured positioning reference signal resources.

16. A first communication device, The first communication device includes a transceiver module and a processing module, A first communication device wherein the transceiver module is configured to perform the receiving and transmitting operations described in claim 1, 5, 7, 9, or 11, and the processing module is configured to perform the processing operations described in claim 1, 5, 7, 9, or 11.

17. A second communication device, The second communication device includes a transceiver module, The transceiver module is configured to perform the receiving and transmitting operations described in claim 2, 6, 8, 10, or 12, in a second communication device.

18. A communication device, The communication device includes a processor, the processor is configured to execute computer programs or computer instructions in memory to perform the method according to claim 1, 2, 5, 6, 7, 8, 9, 10, 11, or 12.

19. The communication device according to claim 18, further comprising the memory.

20. A computer-readable storage medium, A computer-readable storage medium that stores a computer program, and when the computer program is executed by a communication device, the communication device is able to perform the method according to claim 1, 2, 5, 6, 7, 8, 9, 10, 11, or 12.

21. A computer program that, when executed by a computer, causes the computer to perform the method according to claim 1, 2, 5, 6, 7, 8, 9, 10, 11, or 12.

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