Resource indication 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] [CROSS-REFERENCE TO RELATED APPLICATIONS] This application claims priority to Chinese Patent Application No. 202210957863.2, entitled "RESOURCE INDICATION METHOD AND COMMUNICATION APPARATUS," filed with the State Intellectual Property Office of China on August 10, 2022, which is incorporated herein by reference in its entirety. [Technical field] This application relates to the field of communication technology, and in particular to a resource indication method and a communication device. [Background technology]

[0002] In a sidelink (SL) communication system, communication transmission may be performed between terminal devices by using a sidelink. To realize sidelink positioning between terminal devices, a positioning reference signal may be transmitted between different terminal devices.

[0003] Currently, the minimum scheduling resource in a sidelink communication system is a subchannel. Specifically, a spectrum segment (including one or more subchannels) within a single slot can be allocated to only one user. Therefore, a terminal device can reserve only one subchannel or several subchannels and transmit a positioning reference signal by using the reserved subchannel. It can be seen that the above technical solutions provide poor flexibility in reserving resources by terminal devices. Summary of the Invention

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

[0005] A first aspect of the present application provides a resource indication method, including:

[0006] The first communication device determines sidelink control information (SCI), the SCI being for indicating or reserving 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, both M and N being integers greater than or equal to 1, the N time units including P pre-configured positioning reference signal resources, or a resource pool in which the N time units are located includes P pre-configured positioning reference signal resources, the M positioning reference signal resources being some or all of the P pre-configured positioning reference signal resources, P being an integer greater than or equal to 1, and the first communication device 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 indicate or reserve the M positioning reference signal resources for the second communication device based on the SCI. It can be seen that the granularity of resource reservation performed by the terminal device is the reference signal resource, and the P pre-configured reference signal resources may be flexibly configured in a pre-configured manner. This helps improve the flexibility of reserving positioning reference signal resources by the first communication device and reduce the complexity of reserving positioning reference signal resources by the first communication device. The second communication device may determine, based on the SCI, that the first communication device will transmit 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 the M positioning reference signal resources corresponding to N time units, thereby realizing sidelink positioning between the first communication device and the second communication device.

[0008] A second aspect of the present application provides a resource indication method, the method including:

[0009] The second communication device receives an SCI from the first communication device, the SCI being for indicating or reserving 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, both M and N being integers greater than or equal to 1, the N time units including P preconfigured positioning reference signal resources, or the resource pool in which the N time units are located includes P preconfigured positioning reference signal resources, the M positioning reference signal resources being some or all of the P preconfigured positioning reference signal resources, P being 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, where the SCI 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, sidelink positioning between the first communication device and the second communication device is realized. Furthermore, the granularity of resource reservation performed by the terminal device is the reference signal resource, and the P preconfigured reference signal resources may be flexibly configured in a preconfigured manner. This helps 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 a possible implementation based on the first or second aspect, M is greater than or equal to N and P is greater than or equal to M.

[0012] Based on the first or second aspect, in a possible implementation manner, 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 (RSU), or the first communication device is an RSU and the second communication device is a terminal device.

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

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

[0015] Based on the first or second aspect, in a possible implementation manner, the SCI includes a first field, and 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, so that the second communication device determines the M positioning reference signal resources, for example, the first field is for indicating or reserving indexes or identifiers of the M positioning reference signal resources.

[0017] Based on the first or second aspect, in a possible implementation manner, 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] In this implementation, factors to be considered when designing the length of the first field are presented. Specifically, the length of the first field may be designed with reference to the maximum number of time units or the maximum number of positioning reference signal resources that can be indicated or reserved by the SCI.

[0019] According to the first or second aspect, in a possible implementation manner, 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 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.

[0020] In this implementation, N time units include P preconfigured 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 preconfigured positioning reference signal resources included in each time unit. Usually, the number of preconfigured positioning reference signals included in each time unit is less than the number of subchannels in the entire 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 indicating or reserving positioning reference signal resources by the first communication device.

[0021] According to the first or second aspect, in a possible implementation manner, when the resource pool in which the N time units are located 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.

[0022] In this implementation, a resource pool in which N time units are located includes P preconfigured 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 preconfigured positioning reference signals included in the resource pool. Typically, the number of preconfigured positioning reference signal resources included in the resource pool is less than the number of subchannels in the entire 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 indicating or reserving positioning reference signal resources by the first communication device.

[0023] In a possible implementation based on the first or second aspect, the length of the first field satisfies the following condition:

number

number

number

number

number

[0024] In the implementation manner in which the first field indicates M positioning reference signal resources, a possible implementation manner of the length of the first field is shown. Usually, the number of pre-configured positioning reference signals included in each time unit is less than the number of sub-channels in the entire bandwidth. From the conditions satisfied by the length of the first field, it can be seen that in the technical solution of this application, the length of the first field can be designed to be short, so as to reduce the overhead of indicating or reserving positioning reference signal resources by the first communication device.

[0025] In a possible implementation based on the first or second aspect, the length of the first field satisfies the following condition:

number

number

number

number

number

[0026] In the implementation manner in which the first field indicates M positioning reference signal resources, a possible implementation manner of the length of the first field is shown. Usually, the number of pre-configured positioning reference signals included in the resource pool is less than the number of subchannels in the entire bandwidth. From the conditions that the length of the first field must satisfy, it can be seen that in the technical solution of this application, the length of the first field can be designed to be short, so as to reduce the overhead of indicating or reserving positioning reference signal resources by the first communication device.

[0027] In a possible implementation based on the first or second aspect, the length of the first field satisfies the following condition:

number

[0028] In a possible implementation based on the first or second aspect, the length of the first field satisfies the following condition:

number

[0029] In a possible implementation based on the first or second aspect, the length of the first field satisfies the following condition:

number

[0030] In another possible implementation, the length of the first field satisfies the following condition:

number

[0031] Other possible realizations are a=k0, a=k reserve Or k1=Q.

[0032] In a possible implementation based on the first or second aspect, 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 aspect, the length of the first field is 4 bits, 8 bits or 12 bits.

[0034] According to the first or second aspect, in a possible implementation, when the SCI is for indicating or reserving only positioning reference signal resources within one time unit, the length of the first field is 4 bits, or When the SCI is for indicating or reserving positioning reference signal resources within two time units, the length of the first field is 8 bits, or When the SCI is for indicating or reserving 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 aspect, the length of the first field is 8 bits, the four most significant bits in the first field indicate a positioning reference signal resource in a first time unit of the two time units, and the four least significant bits in the first field indicate a positioning reference signal resource in a second time unit of the two time units.

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

[0037] In a possible implementation based on the first or second aspect, k reserve is indicated by using radio resource control (RRC) signaling. For example, in a possible implementation, k reserve is indicated by using an information element in the configuration signaling related to the sidelink resource pool in the RRC signaling. For example, k reserve is indicated by using the Maximum Sidelink Reservation (sl-MaxNumPerReserve) information element in configuration signaling related to the sidelink resource pool in RRC signaling.

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

[0039] In a possible implementation based on the first or second aspect, the calculation formula for the length of the first field can be reserved as k reserve k out of the maximum number of positioning reference signal resources reserveIt may also indicate that only k0 positioning reference signal resources need to be indicated. The other k0 positioning reference signal resources are indicated in other manners. For example, the k0 positioning reference signal resources are indicated by using frequency domain location information or time domain location information of a physical sidelink control channel (PSCCH) carrying control signaling (e.g., SCI). Optionally, the frequency domain location information includes a start frequency or bandwidth. The start frequency includes a start resource block (RB), a start subchannel, any other frequency-related information, etc. The bandwidth includes a bandwidth size, for example, the number of RBs, the number of subchannels, or the number of resource elements (REs). The time domain location information includes information such as a slot, a start symbol, a subframe, and / or a frame.

[0040] In a possible implementation based on the first or second aspect, the value of the first field satisfies the following condition: I1 + I2 × N slprs +…I N ×(N slprs ) N-1 or I1+I2×N slprs +…I N ×(N slprs ) N-1 +Y, where I1 represents the index of the positioning reference signal resource in the first time unit of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated or reserved by the SCI, and I N is the index of the positioning reference signal resource in 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 coded starting 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 may be an integer, and Y may be equal to -1, -2, -3, 0, 1, 2, 3, etc.

[0041] In an implementation in which the first field indicates M positioning reference signal resources, possible conditions that the value of the first field may 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 to receive 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 aspect, the value of the first field satisfies 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, where I1 represents the index of the positioning reference signal resource in the first time unit of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated or reserved by the SCI, and I N is the index of the positioning reference signal resource in 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 coded starting 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 may be an integer, and Y may be equal to -1, -2, -3, 0, 1, 2, 3, etc.

[0043] In an implementation in which the first field indicates M positioning reference signal resources, other possible conditions that the value of the first field may satisfy are indicated. In this way, the second communication device can determine the positioning reference signal resource reserved by the first communication device in each of the N time units based on the above conditions. This facilitates the second communication device to receive 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 aspect, the value of the first field satisfies the following condition: I1 + I2 × Q + ... I N ×(Q) N-1 or I1 + I2 × Q + … I N ×(Q) N-1 +Y, where I1 represents the index of the positioning reference signal resource in the first time unit of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated or reserved by the SCI, and I Nwhere Y is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the 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 coded starting from 0. Y is a constant, and Y is pre-defined 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.

[0045] In an implementation in which the first field indicates M positioning reference signal resources, other possible conditions that the value of the first field may satisfy are indicated. In this way, the second communication device can determine the positioning reference signal resource reserved by the first communication device in each of the N time units based on the above conditions. This facilitates the second communication device to receive 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 aspect, the value of the first field satisfies the following condition: I1 + I2 × Q + ... I N ×(Q) N-1 -1 or I1+I2×Q+…I N ×(Q) N-1 -1+Y, where I1 represents the index of the positioning reference signal resource in the first time unit of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated or reserved by the SCI, and I Nwhere Y is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the 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 coded from 1. Y is a constant, and Y is pre-defined 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.

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

[0048] Based on the first or second aspect, in a possible implementation manner, the SCI includes a first field, and the first field is for indicating or reserving 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, and thus the second communication device determines the M positioning reference signal resources corresponding to the N time units.

[0050] According to the first or second aspect, in a possible implementation manner, frequency bands occupied by different positioning reference signal resources among the P preconfigured positioning reference signal resources have overlapping portions.

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

[0052] According to the first or second aspect, in a possible implementation manner, each positioning reference signal resource among the P pre-configured positioning reference signal resources occupies a part or all of the bandwidth of the resource pool.

[0053] In this implementation, the first communication device indicates or reserves M positioning reference signal resources corresponding to N time units and transmits a positioning reference signal based on the M positioning reference signal resources corresponding to the N time units. Because positioning accuracy is strongly related to signal bandwidth, the positioning reference signal resources occupy 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 a portion of the P preconfigured positioning reference signal resources, and the remaining positioning reference signal resources may be used by other users. In this way, multiple users transmit positioning reference signal resources within one slot, and the bandwidth used by each user to transmit a positioning reference signal 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] According to the first or second aspect, in a possible implementation manner, when N time units include P preconfigured positioning reference signal resources, the configurations of the preconfigured positioning reference signal resources included in different time units are the same.

[0055] In this implementation, the configurations of the pre-configured positioning reference signal resources included in different time units may be the same, thereby facilitating the implementation of the solution and making the configuration of the positioning reference signal resources of the system simpler.

[0056] Based on the first aspect, in a possible implementation manner, the method further includes:

[0057] The first communication device receives downlink control information (DCI) from a third communication device, the DCI instructing 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 to realize sidelink positioning between the first communication device and the second communication device.

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

[0060] Based on the first aspect, in a possible implementation manner, the method further includes:

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

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

[0063] According to the first or second aspect, in a possible implementation, the SCI further comprises a second field, which is for reserving N time units.

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

[0065] Based on the first or second aspect, in a possible implementation manner, 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] In this implementation, factors to be considered when designing the length of the second field are presented. Specifically, the length of the second field may be designed with reference to the maximum number of time units or the maximum number of positioning reference signal resources that can be indicated or reserved by the SCI.

[0067] In a possible implementation based on the first or second aspect, when N time units include two slots, the length of the second field is 5 bits, or when N time units include three slots, the length of the second field is 9 bits.

[0068] According to the first or second aspect, in a possible implementation manner, 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, or When N time units include P pre-configured positioning reference signal resources, different positioning reference signal resources among the pre-configured positioning reference signal resources included in each time unit satisfy a time division multiplexing relationship on the same frequency domain resource, or When N time units include P preconfigured positioning reference signal resources, among the preconfigured positioning reference signal resources included in each time unit, the positioning reference signal resources occupying the same time domain resource satisfy a frequency division multiplexing relationship on the same time domain resource, and the 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 a frequency division multiplexing relationship and / or a time division multiplexing relationship. Multiple positioning reference signal resources included in one time unit can be used by multiple users, so that multiple users transmit positioning reference signals within one time unit. Furthermore, there is little or no signal interference between different users, which helps improve system capacity.

[0070] A third aspect of the present application provides a first communication device, a processing module configured to determine an SCI, the SCI being for indicating or reserving 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, both M and N being integers greater than or equal to 1, the N time units including P pre-configured positioning reference signal resources, or a resource pool in which the N time units are located including the P pre-configured positioning reference signal resources, the M positioning reference signal resources being some or all of the P pre-configured positioning reference signal resources, P being an integer greater than or equal to 1; a transceiver module configured to transmit the SCI to a second communication device; Includes.

[0071] A fourth aspect of the present application provides a second communication device, a transceiver module configured to receive an SCI from a first communication device, the SCI being for indicating or reserving 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, both M and N being integers greater than or equal to 1, the N time units including P pre-configured positioning reference signal resources, or a resource pool in which the N time units are located including P pre-configured positioning reference signal resources, the M positioning reference signal resources being some or all of the P pre-configured positioning reference signal resources, P being an integer greater than or equal to 1; and a transceiver module configured to receive a positioning reference signal from the first communication device based on the SCI.

[0072] In a possible implementation 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] Based on the third or fourth aspect, in a possible implementation manner, 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] According to the third or fourth aspect, in a possible implementation, the SCI is for further indicating or further reserving N time units.

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

[0076] Based on the third or fourth aspect, in a possible implementation manner, 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] According to the third or fourth aspect, in a possible implementation manner, 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 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.

[0078] According to the third or fourth aspect, in a possible implementation manner, when the resource pool in which the N time units are located 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.

[0079] In a possible implementation based on the third or fourth aspect, the length of the first field satisfies the following condition:

number

number

number

number

number

[0080] In a possible implementation based on the third or fourth aspect, the length of the first field satisfies the following condition:

number

number

number

number

number

[0081] In a possible implementation based on the third or fourth aspect, the length of the first field satisfies the following condition:

number

[0082] In a possible implementation based on the third or fourth aspect, the length of the first field satisfies the following condition:

number

[0083] In a possible implementation based on the third or fourth aspect, the length of the first field satisfies the following condition:

number

[0084] In another possible implementation, the length of the first field satisfies the following condition:

number

[0085] In a possible implementation 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 a possible implementation based on the third or fourth aspect, the length of the first field is 4 bits, 8 bits or 12 bits.

[0087] According to the third or fourth aspect, in a possible implementation, when the SCI is for indicating or reserving only positioning reference signal resources within one time unit, the length of the first field is 4 bits, or When the SCI is for indicating or reserving positioning reference signal resources within two time units, the length of the first field is 8 bits, or When the SCI is for indicating or reserving positioning reference signal resources within three time units, the length of the first field is 12 bits.

[0088] In a possible implementation 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 a positioning reference signal resource in a first time unit of the two time units, and the four least significant bits in the first field indicate a positioning reference signal resource in a second time unit of the two time units.

[0089] Based on the third or fourth aspect, in a possible implementation manner, 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 a first time unit of the two time units, and the four most significant bits in the first field indicate a positioning reference signal resource in a second time unit of the two time units.

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

[0091] In a possible implementation based on the third or fourth aspect, the calculation formula for the length of the first field may indicate that the length of the first field is related to the maximum number of resources or the maximum number of 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 calculation formula for the length of the first field can be reserved k reserve k positioning reference signal resources reserve It may also indicate that only k0 positioning reference signal resources need to be indicated. The other k0 positioning reference signal resources are indicated in other manners. For example, the k0 positioning reference signal resources are indicated by using frequency domain location information or time domain location information of a PSCCH carrying control signaling (e.g., SCI). Optionally, the frequency domain location information includes a start frequency or bandwidth. The start frequency includes RB, start subchannel, any other frequency-related information, etc. The bandwidth includes a bandwidth size, for example, the number of RBs, the number of subchannels, or the number of REs. The time domain location information includes information such as a slot, a start symbol, a subframe, and / or a frame.

[0093] In a possible implementation based on the third or fourth aspect, the value of the first field satisfies the following condition: I1 + I2 × N slprs +…I N ×(N slprs ) N-1 or I1+I2×N slprs +…I N ×(N slprs ) N-1 +Y, where I1 represents the index of the positioning reference signal resource in the first time unit of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated or reserved by the SCI, and I Nis the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the SCI, and N slprs represents 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 coded starting 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 may be an integer, and Y may be equal to -1, -2, -3, 0, 1, 2, 3, etc.

[0094] In a possible implementation based on the third or fourth aspect, the value of the first field satisfies 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, where I1 represents the index of the positioning reference signal resource in the first time unit of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated or reserved by the SCI, and I N is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the SCI, and N slprs represents 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 coded starting 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 may be an integer, and Y may be equal to -1, -2, -3, 0, 1, 2, 3, etc.

[0095] In a possible implementation based on the third or fourth aspect, the value of the first field satisfies the following condition: I1 + I2 × Q + ... I N ×(Q) N-1 or I1 + I2 × Q + … I N ×(Q) N-1 +Y, where I1 represents the index of the positioning reference signal resource in the first time unit of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated or reserved by the SCI, and I N where Y is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the 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 coded starting from 0. Y is a constant, and Y is pre-defined 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] In a possible implementation based on the third or fourth aspect, the value of the first field satisfies the following condition: I1 + I2 × Q + ... I N ×(Q) N-1 -1 or I1+I2×Q+…I N ×(Q) N-1 -1+Y, where I1 represents the index of the positioning reference signal resource in the first time unit of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated or reserved by the SCI, and I Nwhere Y is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the 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 coded from 1. Y is a constant, and Y is pre-defined 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.

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

[0098] According to the third or fourth aspect, in a possible implementation manner, the frequency bands occupied by different positioning reference signal resources among the P preconfigured positioning reference signal resources have an overlapping portion.

[0099] According to the third or fourth aspect, in a possible implementation manner, each positioning reference signal resource among the P pre-configured positioning reference signal resources occupies a part or all of the bandwidth of the resource pool.

[0100] Based on the third or fourth aspect, in a possible implementation manner, when N time units include P preconfigured positioning reference signal resources, the configurations of the preconfigured positioning reference signal resources included in different time units are the same.

[0101] According to the third aspect, in a possible implementation, the transceiver module comprises: The third communication device is further configured to receive a DCI from the third communication device, the DCI instructing the first communication device to reserve M positioning reference signal resources.

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

[0103] According to the third aspect, in a possible implementation, the transceiver module comprises: It is further configured to receive configuration information from the third communication device, the configuration information being for configuring the P pre-configured positioning reference signal resources.

[0104] According to the third or fourth aspect, in a possible implementation, the SCI further comprises a second field, the second field being for reserving N time units.

[0105] Based on the third or fourth aspect, in a possible implementation manner, 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 a possible implementation based on the third or fourth aspect, the length of the second field is 5 bits when the N time units include 2 slots, or the length of the second field is 9 bits when the N time units include 3 slots.

[0107] According to the third or fourth aspect, in a possible implementation manner, 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, or When N time units include P pre-configured positioning reference signal resources, different positioning reference signal resources among the pre-configured positioning reference signal resources included in each time unit satisfy a time division multiplexing relationship on the same frequency domain resource, or When N time units include P preconfigured positioning reference signal resources, among the preconfigured positioning reference signal resources included in each time unit, the positioning reference signal resources occupying the same time domain resource satisfy a frequency division multiplexing relationship on the same time domain resource, and the 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 the present application provides a communications device, the communications device including a processor, the processor configured to invoke and execute a computer program stored in a memory, such that the processor implements any of the implementation methods of either the first or second aspect.

[0109] Optionally, the communications device further comprises a transceiver, the processor further configured to control the transceiver to receive and transmit signals.

[0110] Optionally, the communication device includes a memory, the memory storing the computer program.

[0111] A sixth aspect of the present application provides a computer program product including instructions that, when executed on a computer, enable the computer to perform an implementation of either the first or second aspect.

[0112] A seventh aspect of the present application provides a computer-readable storage medium containing computer instructions that, when executed on a computer, enable the computer to perform any of the implementations of either the first or second aspect.

[0113] An eighth aspect of the present application provides a chip device including a processor, the processor being configured to connect to a memory and to invoke a program stored in the memory to enable the processor to execute any of the implementation methods of either the first aspect and the second aspect.

[0114] A ninth aspect of the present application provides a communication system, the communication system including a first communication device according to the third aspect and a second communication device according to the fourth aspect.

[0115] According to the above technical solutions, it can be seen that the embodiments of this application have the following advantages:

[0116] In the above technical solution, the first communication device determines an SCI, 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. The N time units include P pre-configured positioning reference signal resources, or a resource pool in which the N time units are located includes the 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. Then, the first communication device sends the SCI to the second communication device. It can be understood 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 the M positioning reference signal resources for the second communication device based on the SCI. It can be seen that the granularity of resource reservation performed by the terminal device is the reference signal resource, and the P pre-configured reference signal resources may be flexibly configured in a pre-configured manner. This helps improve the flexibility of reserving positioning reference signal resources by the first communication device and reduce the complexity of reserving positioning reference signal resources by the first communication device. The second communication device may determine, based on the SCI, 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 sidelink positioning between the first communication device and the second communication device. [Brief explanation of the drawings]

[0117] [Figure 1] 1 is a first diagram of a communication system to which an embodiment of the present application is applied; [Figure 2] FIG. 2 is a second diagram of a communication system to which an embodiment of the present application is applied. [Figure 3] FIG. 3 is a third diagram of a communication system to which an embodiment of the present application is applied. [Figure 4] FIG. 4 is a fourth diagram of a communication system to which an embodiment of the present application is applied. [Figure 5] FIG. 1 is a diagram of comb sizes according to an embodiment of the present application. [Figure 6] 1 is a diagram of an embodiment of a resource indication method according to an embodiment of the present application; [Figure 7] FIG. 10 is a diagram illustrating indicating positioning reference signal resources by SCI according to an embodiment of the present application. [Figure 8] FIG. 1 is a first diagram of positioning reference signal resources according to an embodiment of the present application. [Figure 9] FIG. 2 is a second diagram of positioning reference signal resources according to an embodiment of the present application. [Figure 10] FIG. 10 is a third diagram of positioning reference signal resources according to an embodiment of the present application. [Figure 11] FIG. 2 is a diagram of a first field and a second field included in an SCI according to an embodiment of the present application. [Figure 12] FIG. 1 is a diagram of 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] 1 is a structural diagram of a first communication device according to an embodiment of this application; [Figure 14] FIG. 10 is a structural diagram of a second communication device according to an embodiment of this application. [Figure 15] FIG. 2 is a diagram of the structure of a terminal device according to an embodiment of the present application; [Figure 16] 1 is a diagram of the structure of a communication device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0118] Embodiments of the present application provide 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.

[0119] The following clearly and completely describes the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. It is clear that the described embodiments are only a part, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative efforts shall fall within the protection scope of this application.

[0120] References in this application to "an embodiment," "some embodiments," etc., mean that one or more embodiments of this application include the particular feature, structure, or characteristic described with reference to the embodiment. Thus, phrases such as "in an embodiment," "in some embodiments," "in some other embodiments," and "in other embodiments" appearing in different places in this specification are not necessarily meant to refer to the same embodiment. Rather, unless specifically emphasized otherwise, they mean "one or more, but not all, of the embodiments." The terms "including," "having," and variations thereof all mean "including, but not limited to," unless specifically emphasized otherwise.

[0121] In the description of this application, unless otherwise specified, " / " means "or." For example, A / B may mean A or B. The term "and / or" in this specification describes only the association relationship between related objects and indicates that three relationships may exist. For example, A and / or B may represent the following three cases: only A is present, both A and B are present, and only B is present. Furthermore, "at least one" means one or more, and "plurality" means two or more. At least one of the following items or similar expressions refers to any combination of these items, including any combination of a single item or 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 solution of this application may be applied to a sidelink communication system and a device-to-device (D2D) communication system. For example, the sidelink communication system may include an Internet of Things (IoT) system. The system may specifically be a public safety system, a smart city system, a transportation safety system, an industrial control system, a vehicle-to-everything (V2X) system, such as an unmanned driving system and an industrial robot system, an industrial Internet of Things (IIoT), a smart home system, etc.

[0123] Below, several scenarios to which this application can be applied will be described with reference to FIGS.

[0124] Figure 1 is a structural diagram of a communication system according to an embodiment of this application. Please refer to Figure 1. The communication system includes: a terminal device 101, a terminal device 102, an access network device 103, an access and mobility management function (AMF) 104 and a location management function (LMF) 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, terminal device 101 and terminal device 102 may be connected through a ProSe communication 5 (PC5) interface. Terminal device 101 and terminal device 102 are separately connected to access network device 103 through an NR-Uu interface, and access network device 103 is connected to AMF 104 through an NG-C interface. AMF 104 is connected to LMF 105 through an NL1 interface. The NR-Uu interface is a communication interface between terminal devices and access network devices. 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 LMF.

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

[0128] 2 is a diagram of another embodiment of a communication system according to an embodiment of this application. Please refer to FIG. 2. The communication system includes a terminal device 201 and a terminal device 202. The terminal device 201 communicates with the terminal device 202 through a proximity service communication 5 (PC5) interface. The technical solution in this application is implemented between the terminal device 201 and the terminal device 202 to realize sidelink positioning between the terminal device 201 and / or the terminal device 202.

[0129] 3 is a diagram of another embodiment of a communication system according to an embodiment of this application. Please refer to FIG. 3. The communication system includes a terminal device 301, an RSU 302, an RSU 303, and an RSU 304. The terminal device 301 and the RSUs 302 to 304 are outside the signal coverage of an access network device. As shown in FIG. 3, the terminal device 301 communicates with the RSUs through a PC5 interface. The terminal device 301 and the RSUs can position the terminal device 301 by using the technical solution of this application.

[0130] It should be noted that the format of the RSU in the communication system shown in FIG. 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, supports sidelink communication and positioning-related protocols, and can provide wireless communication capabilities to terminal devices. The RSU may be various types of roadside stations, access points, or sidelink devices. To an access network device, the RSU is a terminal device. To a terminal device, the RSU may function as an access network device.

[0132] 4 is a diagram of another embodiment of a communication system according to an embodiment of this application. The communication system includes a terminal device 401, a terminal device 402, an access network device 403, and an LMF 404. The terminal device 401 is located in the signal coverage of the access network device 403, and the terminal device 402 is not located in the signal coverage of the access network device 403. The terminal device 401 and the terminal device 402 may implement the technical solutions of this application and send corresponding measurement results to the LMF 404 through the access network device 403, so that the LMF 404 positions the terminal device 401 and / or the terminal device 402.

[0133] In the communication systems shown in FIGS. 1 and 4, the LMF is a name in the current communication system. In future communication systems, the name of the LMF may change with the evolution of the communication system. The name of the LMF is not limited in this application. For example, the LMF may be called a location management device, and the location management device is configured to perform positioning calculations for the location of a terminal device. In the current communication system or the future communication system, any functional network element having other names and functions similar to those of the LMF may be understood as a location management device in the embodiments of this application and is applicable to the communication method provided in the embodiments of this application.

[0134] The above communication systems to which this application is applicable are merely examples. In practical applications, this application can also be applied to other communication systems with positioning requirements, which are 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 the access network device 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 be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connectivity, or other processing device connected to a wireless modem.

[0137] A terminal device, also referred to as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device including a wireless communication function (providing a voice / data connection to a user), for example, a handheld device or an in-vehicle device with a wireless connection function. Currently, some examples of terminal devices are a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a train, an automobile, an unmanned aerial vehicle, an airplane, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in the Internet of Vehicles, a wireless terminal in self-driving (e.g., an unmanned aerial vehicle or a vehicle), a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, etc. For example, a wireless terminal in the Internet of Vehicles may be an on-board device, an entire vehicle device, an on-board module, a vehicle, etc. A wireless terminal in industrial control may be a robot, etc.

[0138] An access network device is a device located in a radio access network and providing wireless communication capabilities to a terminal device, and may be a radio access network (RAN) node that enables the terminal device to access the wireless network.

[0139] The access network device includes, but is not limited to, an evolved NodeB (eNB), a radio network controller (RNC), a NodeB (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved NodeB or home NodeB (HNB)), a baseband unit (BBU), an access point (AP) in a wireless fidelity (Wi-Fi) system, a wireless relay node, a wireless backhaul node, a transmission point (TP), a transmission and reception point (TRP), etc., or a network device in a 5G mobile communication system, such as a next generation NodeB (gNB), a transmission reception point (TRP) or a transmission point (TRP) in a new radio (NR) system. The access network device may be a gNB (Gigabit Network Point), or one or a group of antenna panels (including multiple antenna panels) of base stations in a 5G mobile communication system. Alternatively, the access network device may be a network node forming a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU).

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

[0141] For example, the CU is responsible for processing non-real-time protocols and services and realizes the functions of the RRC layer and packet data convergence protocol (PDCP) layer. The DU is responsible for processing physical layer protocols and real-time services and realizes the functions of the radio link control (RLC) layer, media access control (MAC) layer, and physical (PHY) layer. The AAU realizes some physical layer processing functions, radio frequency processing, and functions related to active antennas. Information in the RRC layer ultimately changes to or changes 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 by the DU and AAU.

[0142] It can be understood that the access network device may be a device including one or more of a CU node, a DU node, and an AAU node. Furthermore, the CU may be classified as a network device in an access network (radio access network, RAN), or the CU may be classified as a network device in a core network (CN), which is not limited in this application.

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

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

[0145] Comb size corresponding to a positioning reference signal resource: Typically, the comb size is the difference between the indexes of any two adjacent subcarriers among the subcarriers occupied by the resource on one time-domain symbol, or the number of subcarriers in the interval between any two adjacent subcarriers among the subcarriers occupied by the resource on one time-domain symbol plus one. For example, as shown in FIG. 5, a resource includes a time-frequency resource represented by the shaded area in FIG. 5. The resource occupies subcarrier 0, subcarrier 4, subcarrier 8, subcarrier 12, subcarrier 16, and subcarrier 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 three subcarriers between subcarrier 16 and subcarrier 20. It can be seen that the comb size is 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 indexes of any two adjacent subcarriers among the subcarriers occupied by the positioning reference signal resource in each time domain symbol, or the number of subcarriers in the interval between any two adjacent subcarriers among the subcarriers occupied by the positioning reference signal resource in each time domain symbol plus 1. The comb size of the positioning reference signal resource in each time domain symbol is the same. The subcarriers occupied by the positioning reference signal resource in each time domain symbol are evenly distributed or evenly spaced. For example, as shown in Figure 8, the comb size of positioning reference signal resource 1 in each time domain symbol is 4.

[0146] Resource pool: At least one resource pool is configured in the sidelink communication system. Each resource pool includes a segment of frequency resources and a group of time resources, e.g., a group of slot units. The sidelink communication system may indicate available frequency domain resources and available time resources in a resource pool by using signaling. Resource scheduling in the sidelink communication system is performed based on the resource pool. Specifically, a user may schedule, indicate, or reserve only resources in one resource pool, such as time resources, frequency resources, or positioning reference signal resources. Positioning reference signal resources indicate time-frequency resources indicated by reference signal configuration information for transmitting reference signals.

[0147] Optionally, the bandwidth part (BWP) is the available bandwidth of the sidelink communication system, and the bandwidth of the resource pool is typically less than or equal to the bandwidth part.

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

[0149] A 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] In the following, several possible implementations of the first communication device and the second communication device are described.

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

[0152] For example, as shown in FIG. 2, the first communication device is a terminal device 201 and the second communication device is a 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 FIG. 3, the first communication device is an RSU 302 and the second communication device is a 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 FIG. 3, the first communication device is a terminal device 301 and the second communication device is an RSU 302.

[0157] In a sidelink communication system, communication transmission may be performed between terminal devices based on a sidelink, and positioning reference signals may be transmitted between different terminal devices to realize sidelink positioning between the terminal devices.

[0158] The minimum scheduling resource in a sidelink communication system is a subchannel. Specifically, a segment of spectrum resources (including one or more subchannels) within a single slot can only be allocated to one user, not multiple users. Therefore, a terminal device can reserve only one or several specific subchannels and transmit a positioning reference signal by using the reserved subchannels. It can be seen that the above technical solutions provide poor flexibility in reserving resources by terminal devices.

[0159] This application provides a corresponding technical solution to enable 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.

[0160] Furthermore, sidelink positioning accuracy is usually strongly related to the transmission bandwidth of the positioning reference signal. For example, positioning accuracy depends on the accuracy of the measurement quantity, e.g., the time of arrival, which is related to the signal bandwidth. A larger signal bandwidth indicates a higher time of arrival accuracy and a smaller error.

[0161] Therefore, 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 a resource pool (i.e., all subchannels in 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 a large number of users exist in a sidelink communication system, the problem of insufficient system capacity occurs, resulting in the positioning requirements of some users being unable to be met. On the other hand, 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 each user's positioning reference signal is limited, and positioning accuracy is low. Therefore, how to improve system capacity and positioning accuracy is a problem to be solved in this application.

[0162] The technical solutions of this application are described below with reference to specific embodiments.

[0163] 6 is a diagram of an embodiment of a resource indication method according to an embodiment of the present application. Referring to FIG. 6, the method includes the following steps:

[0164] 601: A first communication device determines an SCI, where the SCI is for indicating or reserving M positioning reference signal resources.

[0165] The M positioning reference signal resources correspond to N time units, where 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. That is, M is greater than or equal to N.

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

[0167] Optionally, the N time units are indicated or reserved by the first communication device.

[0168] Optionally, the time unit may be multiple slots, one slot, half a slot, or some time domain symbols in one slot. In the following, the technical solution of this application will be mainly described 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 the 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] The M positioning reference signal resources may be a part or all of the P pre-configured positioning reference signal resources, where P is an integer equal to or greater than 1.

[0171] Specifically, P pre-configured positioning reference signal resources are pre-configured in the sidelink communication system, and 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 FIG. 8 , the N time units include slot 1, slot 12, and slot 15. The P preconfigured 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 FIG. 7 , based on SCI1, the first communication device instructs or reserves that the first communication device transmits 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.

[0173] For example, as shown in FIG. 8 , the N time units include slot 1, slot 12, and slot 15. The P preconfigured 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. Based on the SCI, the first communication device may instruct or reserve that the first communication device transmits 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. In other words, the first communication device may instruct or reserve multiple positioning reference signal resources within each time unit.

[0174] The sidelink communications system may configure positioning reference signal resources in a pre-configured manner, such that the sidelink communications system pre-configures the reservable positioning reference signal resources based on actual requirements, thereby improving the flexibility of reserving positioning reference signal resources by the first communications device. Furthermore, the first communications device selects positioning reference signal resources from the P pre-configured positioning reference signal resources and indicates or reserves M positioning reference signal resources. This helps to reduce the complexity of reserving resources by the first communications device.

[0175] Optionally, the frequency bands occupied by different positioning reference signal resources among the P preconfigured positioning reference signal resources have an overlapping portion. Each positioning reference signal occupies a specific bandwidth, and the frequency range corresponding to the bandwidth may be referred to as the frequency band occupied by the positioning reference signal resource.

[0176] 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. The four positioning reference signal resources occupy the same frequency band.

[0177] Optionally, each positioning reference signal resource in 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 preconfigured 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 one slot, and the bandwidth for transmitting the positioning reference signal by each user is the bandwidth of the resource pool. In this way, resources can be reused by multiple users, thereby improving system capacity. While ensuring multi-user multiplexing, the positioning accuracy of users is ensured.

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

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

[0182] In Scheme 1, the sidelink communication system preconfigures positioning reference signal resources by using time units as granularity. In other words, each time unit includes at least one preconfigured positioning reference signal resource. The number of preconfigured positioning reference signal resources included 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 include a total of P preconfigured positioning reference signal resources.

[0183] For example, as shown in Figure 8, N time units correspond to N slots. Positioning reference signal resource 1 to positioning reference signal resource 4 are four pre-configured positioning reference signal resources included in one of the N slots. If the number of pre-configured positioning reference signal resources included in each slot is the same, P is equal to 4 x 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, which is not particularly limited in this application. Within the same time unit, different pre-configured positioning reference signal resources have different configurations.

[0185] For the configuration of the positioning reference signal resource, refer to the relevant explanation of the technical terms above. The terminal device may determine a specific position of each preconfigured positioning reference signal resource within each time unit based on the configuration of the preconfigured positioning reference signal resource included in each time unit. For example, as shown in FIG. 8, slot 1 includes preconfigured positioning reference signal resource 1 to preconfigured positioning reference signal resource 4. The terminal device may determine a specific position 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 includes pre-configured positioning reference signal resource 1, positioning reference signal resource 2, positioning reference signal resource 3, and positioning reference signal resource 4 shown in Figure 8. In other words, the configurations of pre-configured positioning reference signal resources included in different slots are the same.

[0187] For example, N time units are N slots, and the N slots include slot 1 and slot 12. Slot 1 includes positioning reference signal resource 1 to positioning reference signal resource 4 shown in Fig. 8. Slot 2 includes positioning reference signal resource 1 and positioning reference signal resource 2 shown in Fig. 9. In other words, the configurations of pre-configured positioning reference signal resources included in different slots may be different.

[0188] Scheme 2: A resource pool in which N time units are located includes P pre-configured positioning reference signal resources.

[0189] In Scheme 2, the sidelink communication system preconfigures positioning reference signal resources by using resource pools as granularity. N time units may be located in one or more resource pools, each of which includes at least one preconfigured positioning reference signal. The one or more resource pools include a total of P preconfigured positioning reference signal resources.

[0190] It should be noted that, from the above related description regarding resource pools, each resource pool includes corresponding time-frequency resources. Therefore, the resource pool in which N time units are located is the resource pool to which the N time units belong. For example, the 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, the N time units are located in one resource pool. As shown in FIG. 8, the resource pool includes preconfigured 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. Then, the first communication device transmits a 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 is used by the first communication device to transmit a positioning reference signal within a time unit. For example, N time units are N slots, and the N slots include slot 1, slot 12, and slot 15. The 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 within each slot.

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

[0192] For the configuration of the positioning reference signal resource, please refer to the relevant explanation of the technical terms above.

[0193] For example, N time units are N slots, and the N slots include slot 1, slot 12, and slot 15. Slot 1, slot 12, and slot 15 are located in resource pool 1. Resource pool 1 includes positioning reference signal resource 1 to positioning reference signal resource 4 shown in Fig. 8. It can be seen from Fig. 8 that different positioning reference signal resources have different configurations in resource pool 1.

[0194] Optionally, the N time units are located in multiple resource pools, and the number of preconfigured positioning reference signal resources included in each of the multiple resource pools may be the same or different, which is not particularly limited in this application. If each resource pool includes Q preconfigured positioning reference signal resources, P is equal to Q×N, where Q is an integer greater than or equal to 1.

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

[0196] The following describes several possible implementation methods of P pre-configured positioning reference signal resources based on the above Scheme 1 (i.e., N time units include P pre-configured positioning reference signal resources).

[0197] Implementation method 1: When N time units include P preconfigured positioning reference signal resources, different positioning reference signal resources among the preconfigured positioning reference signal resources included in each time unit satisfy a frequency division multiplexing relationship on the same time domain resource.

[0198] For example, as shown in FIG. 8, N time units correspond to N slots, and one of the N slots includes 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 FIG. 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 FIG. 8, all four positioning reference signal resources occupy time domain symbol 1 to time domain symbol 6, and positioning reference signal resource 1, positioning reference signal resource 2, positioning reference signal resource 3, and positioning reference signal resource 4 satisfy a frequency division multiplexing relationship on any one of time domain symbol 1 to time domain symbol 6. For example, positioning reference signal resource 1 occupies subcarrier 0, subcarrier 4, and subcarrier 8 on time domain symbol 1, positioning reference signal resource 2 occupies subcarrier 1, subcarrier 5, and subcarrier 9 on time domain symbol 1, positioning reference signal resource 3 occupies subcarrier 2, subcarrier 6, and subcarrier 10 on time domain symbol 1, and positioning reference signal resource 4 occupies subcarrier 3, subcarrier 7, and subcarrier 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 a frequency division multiplexing relationship on the same time domain resource.

[0199] In this implementation, multi-user multiplexing may be achieved among different positioning reference signal resources in a frequency division manner. For example, user 1 uses positioning reference signal resource 1 and positioning reference signal resource 2, and user 2 uses positioning reference signal resource 3, so that multiple users can transmit positioning reference signals within one slot, and the transmission bandwidth of each user's positioning reference signal is the bandwidth of the resource pool. In this implementation, terminal devices may reserve resources at the granularity of reference signal resources 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 include P preconfigured positioning reference signal resources, different positioning reference signal resources among the preconfigured positioning reference signal resources included in each time unit satisfy a time division multiplexing relationship on the same frequency domain resource.

[0201] For example, as shown in FIG. 9, N time units are N slots, and one of the N slots includes positioning reference signal resource 1 and positioning reference signal resource 2. Each positioning reference signal resource occupies the entire bandwidth of the resource pool, i.e., the bandwidth of the resource pool shown in FIG. 9. Positioning reference signal resource 1 and positioning reference signal resource 2 occupy different time domain symbols. As shown in FIG. 9, positioning reference signal resource 1 occupies time domain symbol 2 and time domain symbol 3, and positioning reference signal resource 2 occupies time domain symbol 5 and time domain symbol 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 entire bandwidth of the resource pool in the frequency domain. For example, the subcarriers occupied by positioning reference signal resource 1 on time domain symbol 2 are the same as the subcarriers 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 a time division multiplexing relationship on the same frequency domain resource.

[0202] In this implementation, multi-user multiplexing may be achieved among different positioning reference signal resources in a time-division manner. Specifically, multiple time-domain symbols in one 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 transmit positioning reference signals on different groups of time-domain symbols, resulting in multiple users transmitting positioning reference signals in the same slot. The transmission bandwidth of each user's positioning reference signal may 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 include P preconfigured positioning reference signal resources, among the preconfigured positioning reference signal resources included in each time unit, the positioning reference signal resources occupying the same time domain resource satisfy a frequency division multiplexing relationship on the same time domain resource, and the 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 FIG. 10, N time units correspond to N slots, and one of the N slots includes 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 entire bandwidth of the resource pool, i.e., the bandwidth of the resource pool shown in FIG. 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 a frequency division multiplexing relationship on time domain symbol 1. Positioning reference signal resource 1 and positioning reference signal resource 2 satisfy a 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 a frequency division multiplexing relationship on time domain symbol 5. The positioning reference signal resource 3 and the positioning reference signal resource 4 satisfy a frequency division multiplexing relationship on the time domain symbol 6 .

[0206] In this implementation, 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 in a frequency division manner. Multi-user multiplexing may also be implemented between positioning reference signal resource 3 and positioning reference signal resource in a time division manner, which helps improve resource utilization. The transmission bandwidth of each user's positioning reference signal may 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 described by using an example in which each positioning reference signal resource occupies the entire bandwidth of a resource pool. In practical applications, the bandwidth occupied by each positioning reference signal resource may be configured by an access network device or may be pre-configured, and does not necessarily occupy the entire bandwidth of a resource pool.

[0208] Below, we will describe several possible implementation methods of P pre-configured positioning reference signal resources based on the above Scheme 2 (i.e., the resource pool in which N time units are located includes P pre-configured positioning reference signal resources).

[0209] Implementation method 1: When a resource pool in which N time units are located includes P preconfigured positioning reference signal resources, different positioning reference signal resources in the preconfigured positioning reference signal resources included in the resource pool in which each of the N time units is located satisfy a frequency division multiplexing relationship on the same time domain resource, and each positioning reference signal resource occupies the entire bandwidth of the resource pool.

[0210] Implementation Scheme 2: When a resource pool in which N time units are located includes P preconfigured positioning reference signal resources, different positioning reference signal resources in the preconfigured positioning reference signal resources included in the resource pool in which each of the N time units is located satisfy a time division multiplexing relationship on the same frequency domain resource, and each positioning reference signal resource occupies the entire bandwidth of the resource pool.

[0211] Implementation method 3: When a resource pool in which N time units are located includes P preconfigured positioning reference signal resources, among the preconfigured positioning reference signal resources included in the resource pool in which each of the N time units is located, the positioning reference signal resources occupying the same time domain resource satisfy a frequency division multiplexing relationship on the same time domain resource, and the positioning reference signal resources occupying the same frequency domain resource satisfy a time division multiplexing relationship on the same frequency domain resource, and each positioning reference signal resource occupies the entire bandwidth of the resource pool.

[0212] Implementation Scheme 1 to Implementation Scheme 3 are similar to Implementation Scheme 1 to Implementation Scheme 3 corresponding to the above schemes in which N time units include P pre-configured positioning reference signal resources. For details, please refer to the above related description.

[0213] Optionally, the SCI includes a first field, where the first field is for indicating or reserving M positioning reference signal resources.

[0214] For example, as shown in Figure 11, the SCI may include 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 indexes of the M positioning reference signal resources or identifiers of the M positioning reference signal resources.

[0215] Optionally, 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 signals that can be indicated or reserved by the SCI.

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

[0217] 1. When N time units include P preconfigured positioning reference signal resources, each time unit includes the same number of preconfigured 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 preconfigured 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 preconfigured positioning reference signal resources included in each time unit.

[0218] In this implementation, optionally, the length of the first field satisfies the following condition:

number

[0219]

number

number

number

number

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

[0221] For example, as shown in FIG. 11, the maximum number of slots that can be indicated or reserved by the SCI, K reserve is 3, and each slot contains two pre-configured positioning reference signals, i.e., N slprs is equal to 2. In this case, there are a total of 8 possible choices. Therefore, the length S of the first field may be 3 bits.

[0222] In this implementation, optionally, in a possible implementation, the length of the first field satisfies the following condition:

number

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

[0224] Alternatively, the length of the first field may be determined according to the following conditions:

number

[0225] N slprs k represents the number of pre-configured positioning reference signal resources included in each time unit. 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 may be an integer equal to or greater than 1. For example, k0 is a constant, i.e., a fixed value. It can be seen that k0 may be an integer equal to or greater than 1, indicating that the SCI indicates the index of the positioning reference signal resource only within some time units (e.g., some slots). In a possible implementation, a=0 or a=1. In another possible implementation, a=k0, a=k reserve or k1=N slprs is.

[0226] Alternatively, the length of the first field satisfies certain conditions: 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. When the SCI can indicate positioning reference signal resources within only one time unit (e.g., a future slot), the length of the first field is 4 bits. When the SCI can be used to indicate or reserve positioning reference signal resources within two time units (e.g., two future slots), the length of the first field is 8 bits. When the SCI can be used to indicate or reserve positioning reference signal resources within three time units (e.g., three future slots), the length of the first field is 12 bits.

[0228] For example, as shown in Table 1, the length of the first field is 8 bits. The four most significant bits (i.e., most significant bits (MSBs)) 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., least significant bits (LSBs)) in the first field indicate another positioning reference signal resource (i.e., the second positioning reference signal resource). Alternatively, when the SCI can be used to indicate or reserve only one positioning reference signal resource, the length of the first field is 4 bits. When the SCI can be used to 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 time unit of the two time units, and the four most significant bits in the first field indicate the positioning reference signal resource in the second time unit of the two time units.

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

[0231] Below, two possible implementations of the value of the first field are described. This application is also applicable to other implementations, which are not particularly limited in this application.

[0232] Implementation 1: The value of the first field satisfies the following condition: I1 + I2 × N slprs +…I N ×(N slprs ) N-1 or I1+I2×N slprs +…I N ×(N slprs ) N-1 Satisfy +Y.

[0233] I1 represents the index of the positioning reference signal resource in the first time unit of the N time units indicated or reserved by the SCI. I2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated or reserved by the SCI. N is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the SCI.slprs represents the number of preconfigured positioning reference signal resources included in each time unit. The indices of the preconfigured positioning reference signal resources included in each of the N time units are coded starting 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 may be an integer, and Y may be equal to -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 If N is equal to 3, the value of the first field is I1 + I2 × N slprs +I3×(N slprs ) 2 is.

[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 includes four preconfigured positioning reference signal resources, and the corresponding indices are 0, 1, 2, and 3. The value of the first field is 63. From the conditions, it can be seen that the values of the first field satisfy I1=3, I2=3, and I3=3. Therefore, it can be seen that the SCI is for indicating or reserving the positioning reference signal resource in slot 1 whose index is 3, the positioning reference signal resource in slot 12 whose index is 3, and the positioning reference signal resource in slot 15 whose index is 3. It can be seen that each slot includes four preconfigured positioning reference signal resources, I1 varying in granularity of 1, I2 varying in granularity of 4, and I3 varying in granularity of 16.

[0236] Implementation method 2: The value of the first field satisfies the following condition: I1 + I2 × N slprs +…I N ×(N slprs ) N-1 -1 or I1+I2×N slprs +…IN ×(N slprs ) N-1 Satisfies -1+Y.

[0237] I1 represents the index of the positioning reference signal resource in the first time unit of the N time units indicated or reserved by the SCI. I2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated or reserved by the SCI. N is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the SCI. slprs represents the number of preconfigured positioning reference signal resources included in each time unit. The indices of the preconfigured positioning reference signal resources included in each of the N time units are coded starting 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 may be an integer, and Y may be equal to -1, -2, -3, 0, 1, 2, 3, etc.

[0238] Implementation method 2 is similar to implementation method 1. For details, please refer to the related description of implementation method 1 above.

[0239] 2. When the resource pool in which the N time units are located contains P preconfigured 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 preconfigured 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 preconfigured positioning reference signal resources included in the resource pool.

[0240] In this implementation, the length of the first field satisfies the following condition:

number

number

number

number

number

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

[0242] For example, as shown in FIG. 11, the maximum number of slots that can be indicated or reserved by the SCI, K reserve When N is 3, the resource pool contains two pre-configured positioning reference signals, i.e., N slprs is equal to 2. In this case, there are a total of 8 possible choices. Therefore, the length S of the first field may be 3 bits.

[0243] In this implementation, the length of the first field satisfies the following condition:

number

[0244] 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, 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 equal to or greater than 1. For example, k0 is a constant, i.e., a fixed value. It can be seen that k0 may be an integer equal to or greater than 1, indicating that the SCI indicates the index of the positioning reference signal resource only within some time units (e.g., some slots). k1 is an integer equal to or greater than 0, or k1 is determined based on a system coefficient. For example, k1=k0, k1=k reserve Or k1=Q.

[0245] Alternatively, optionally, the length of the first field satisfies the following condition:

number

[0246] Q represents the number of pre-configured positioning reference signal resources 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 equal to or greater than 1, for example, k0 is a constant, i.e., a fixed value. a is an integer equal to or greater than 0. In a possible implementation, a=0 or a=1. In another possible implementation, a=k0, a=k reserve Or k1=Q.

[0247] Alternatively, the length of the first field satisfies certain conditions: 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. When the SCI can indicate positioning reference signal resources within only one time unit (e.g., a future slot), the length of the first field is 4 bits. When the SCI can be used to indicate or reserve positioning reference signal resources within two time units (e.g., two future slots), the length of the first field is 8 bits. When the SCI can be used to indicate or reserve positioning reference signal resources within three time units (e.g., three future slots), the length of the first field is 12 bits.

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

[0250] In another example, the length of the first field is 12 bits. A manner of indicating the positioning reference signal resource by the first field is shown in Table 2.

[0251] Another possible implementation is k reserve is indicated by using RRC signaling. For example, in a possible implementation, k reserve is indicated by using an information element in the configuration signaling related to the sidelink resource pool in the RRC signaling. For example, k reserve is indicated by using the Maximum Sidelink Reservation (sl-MaxNumPerReserve) information element in configuration signaling related to the sidelink resource pool in RRC signaling.

[0252] In another possible implementation, the calculation formula for the length of the first field may indicate that the length of the first field is related to the maximum number of resources or the maximum number of time units that can be indicated in each sidelink control signaling transmission.

[0253] In another possible implementation, the formula for calculating the length of the first field is k reserve k positioning reference signal resources reserve It may also indicate that only k0 positioning reference signal resources need to be indicated. The other k0 positioning reference signal resources are indicated in other manners. For example, the k0 positioning reference signal resources are indicated by using frequency domain location information or time domain location information of a PSCCH carrying control signaling (e.g., SCI). Optionally, the frequency domain location information includes a start frequency or bandwidth. The start frequency includes a start RB, a start subchannel, any other frequency-related information, etc. The bandwidth includes a bandwidth size, for example, the number of RBs, the number of subchannels, or the number of REs. The time domain location information includes information such as a slot, a start symbol, a subframe, and / or a frame.

[0254] Below, two possible implementations of the value of the first field are described. This application is also applicable to other implementations, which are not particularly limited in this application.

[0255] Implementation 1: The value of the first field satisfies the following condition: I1 + I2 × Q + … I N ×(Q) N-1 or I1 + I2 × Q + … I N ×(Q) N-1 Satisfy +Y.

[0256] I1 represents the index of the positioning reference signal resource in the first time unit of the N time units indicated or reserved by the SCI. I2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated or reserved by the SCI. N is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the 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 coded starting from 0. Y is a constant, and Y is pre-defined 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.

[0257] Implementation 2: The value of the first field satisfies the following condition: I1 + I2 × Q + … I N ×(Q) N-1 -1 or I1+I2×Q+…I N ×(Q) N-1 Satisfies -1+Y.

[0258] I1 represents the index of the positioning reference signal resource in the first time unit of the N time units indicated or reserved by the SCI. I2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated or reserved by the SCI. Nis the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the 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 coded starting from 1. Y is a constant, and Y is pre-defined 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.

[0259] Implementation Scheme 1 and Implementation Scheme 2 are similar to the two implementation schemes of the value of the first field corresponding to the above scheme in which N time units include P pre-configured positioning reference signal resources. For details, please refer to the above related description.

[0260] It can be seen that the length of the first field is related to the maximum number of time units or 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. Alternatively, the length of the first field is related to the maximum number of time units or 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 to which the N time units belong. Usually, the number of pre-configured positioning reference signal resources included in each time unit or the resource pool to which the N time units belong is less than the number of sub-channels 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 are independently designed, and then the first field is formed using the bits corresponding to each time unit. The bits corresponding to each time unit are bits indicating the positioning reference signal resources reserved by the terminal device within the time unit.

[0262] For example, N time units belong to resource pool 1, which includes four preconfigured positioning reference signal resources. One positioning reference signal resource is reserved in each of the N time units. Each time unit may occupy four 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 eight bits, with the first four bits indicating the positioning reference signal resources reserved by the terminal device in slot 1 and the last four bits indicating the positioning reference signal resources reserved by the terminal device in slot 3. In other words, the bits indicating the positioning reference signal resources reserved in slot 1 and the bits indicating the positioning reference signal resources reserved in slot 3 are designed separately, and then the first field is formed by the bits corresponding to each slot.

[0263] Optionally, the SCI is for further indicating or reserving N time units.

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

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

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

[0267] Optionally, the bits for indicating or reserving N time units and the bits for indicating or reserving M positioning reference signal resources may be used as an 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 are independently designed, and then the first field is formed by using the bits of the two parts.

[0268] Optionally, the SCI further comprises a second field, the second field for indicating or reserving 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 indicated or reserved by the SCI is 2, the length of the first field may be 5 bits. When the maximum number of slots that can be indicated or reserved by the SCI is 3, the length of the first field may be 9 bits.

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

[0272] For example, N time units are N slots, and the N slots are slot 1, slot 12, and slot 15. The first field is for indicating or reserving slot 1, slot 12, and slot 15. The first communication device transmits an SCI at the time domain start position of slot 1. Therefore, the first communication device transmits a positioning reference signal in slot 1 by default. Therefore, slot 1 does not need to be indicated by the first field, but is indirectly indicated by the time domain position at which the first communication device transmits an 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 slot 12 and slot 15. Therefore, the length of the first field may be 9 bits, and the 9 bits indicate which two slots out 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 may be carried in a newly designed SCI. The format of the SCI may be a positioning-specific SCI format. For example, the newly designed SCI may also be called sidelink positioning control information (SPCI).

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

[0275] For example, as shown in FIG. 12 , the time-frequency resource used by the first communication device to transmit the SCI belongs to resource pool 1. The M positioning reference signal resources belong to resource pool 2. Resource pool 1 and resource pool 2 may be the same resource pool. For example, the resource pool is a communication resource pool. Alternatively, resource pool 1 and resource pool 2 are not the same resource pool, and resource pool 1 is a communication resource pool and resource pool 2 is 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, where the positioning resource pool is a newly defined resource pool. The SCI belongs to a communication resource pool, i.e., a currently defined resource pool. In this way, the first communication device indicates or reserves positioning reference signal resources across resource pools.

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

[0278] In our opinion, to indicate the reservation of the positioning reference signal resource within a future slot, the SCI should include a field named SL-PRS resource assignment (SL-PRS resource assignment). The positioning reference signal resource assignment field is similar to the frequency resource assignment field in legacy sidelink systems. The positioning reference signal resource assignment field may be designed based on the frequency resource assignment field. The English translation of the above content is as follows: In our opinion, to indicate the reservation of the SL PRS resource within a future slot, a field named SL-PRS resource assignment should be included. This SL-PRS resource assignment field is similar to the frequency resource assignment field in legacy sidelink communication systems. Hence, the design of the frequency resource assignment field can be referred to when designing the SL-PRS resource assignment field.

[0279] K prs The positioning reference signal resources may be configured in a dedicated positioning reference signal resource pool. In this case, K prs There are M indication possibilities. reserve When

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 is

number

number

[0281] Similar to the frequency resource indicator value (FRIV), the positioning reference signal resource indicator value (PRSI resource indicator value (PRSI)) may indicate a specific positioning reference signal resource within each slot. reserv= If 2, PRIV=k prs,1 The positioning reference signal resource in the same slot is indicated by the position of the PSCCH resource, and the other positioning reference signal resource is indicated by PRIV. reserv =3, PRIV=k prs,1 +k prs,2 *K prs k prs,1 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, and k 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 must be used in combination with a time domain resource indicator value (TRIV). If TRIV is N <M reserv If you want to show reserv-N positioning reference signal resources are unused, which is similar to FRIV in legacy side link communication systems. N is the number of positioning reference signal resources actually indicated by the SCI. Usually, N is 1 or 2. The English translation of the above content 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] In the dedicated resource pool, the following process for determining positioning reference signal resources is supported: reserv=2, PRIV=K prs The positioning reference signal resource in the same slot is indicated by the position of the PSCCH resource, and the other positioning reference signal resource is indicated by PRIV. reserv =3, PRIV=k prs,1 +k prs,2 *K prs It is. M reserv is the maximum reservation number, which is indicated by higher layer signaling. prs,1 represents the index of the first reserved positioning reference signal resource, and k prs,2 represents the index of the second reserved positioning reference signal resource. The English equivalent of the above 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

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

number

number

[0285] Optionally, a positioning reference signal resource indicator value (PRS resource indicator value, PRIV), i.e., a value of the positioning reference signal resource assignment (SL-PRS resource assignment) field, may indicate the positioning reference signal resource in each slot. reserv =2, PRIV=K prs,1 +k prs,2 *K prs indicates that the reference signal resources in two slots are indicated, or PRIV=K prs,1 indicates that the reference signal resource in one slot is indicated. reserv =3, PRIV=k prs,1 +k prs,2 *K prs + kprs,3 *(K prs ) 2 indicates that the reference signal resource within three slots is indicated, or PRIV=K prs,1 indicates that the reference signal resource in one slot is indicated, or PRIV=K prs,1 +k prs,2 *K prs k indicates that the reference signal resources within two slots are indicated. 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 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

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

number

number

number

[0288] 6 further includes step 601a, which may be performed before step 601.

[0289] 601a: The third communication device sends configuration information to the first communication device, where the configuration information is for configuring P pre-configured positioning reference signal resources. In response, the first communication device receives the 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 resource, please refer to the relevant description of the above technical terms.

[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 send 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, the configuration information may be carried in an RRC message, a DCI, or a media access control element (MAC CE), which is not particularly limited in this application.

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

[0294] It can be seen that in the technical solution of this application, the granularity of resource reservation performed by the terminal device is the reference signal resource, and the P pre-configured reference signal resources can be flexibly configured in a pre-configured manner. Compared with the solution in which sub-channels are reserved from sub-channels included in the entire bandwidth, the technical solution of this application has higher flexibility, higher positioning accuracy and higher practicability.

[0295] 6 further includes step 601b, which may be performed before step 601.

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

[0297] The 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 details, see the above related description of the first field.

[0299] Optionally, the 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 send 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 another possible implementation, 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 details, see the above related description of the second field.

[0303] Optionally, there is no fixed execution order between step 601a and step 601b. Based on the situation, step 601a may be executed before step 601b, or step 601a and step 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. In response, the second communication device receives the SCI from the first communication device.

[0305] For example, the first communication device is a first terminal device, and the second communication device is a second terminal device. The first terminal device transmits the SCI to the second terminal device. In this manner, the second terminal device may determine that the first terminal device will transmit a positioning reference signal 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 in which the first terminal device reserves a specific positioning reference signal resource. The other terminal devices may avoid the positioning reference signal resource reserved by the first terminal device to avoid contention or collision.

[0307] For the first communication device, before each transmission of a positioning reference signal, the first communication device may transmit an SCI to indicate one or several specific positioning reference signal resources corresponding to specific time units in which the first communication device will transmit the positioning reference signal. For example, as shown in FIG. 7 , the first communication device may transmit SCI1, which indicates that the first communication device will transmit the 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. Then, the first communication device may transmit the positioning reference signal on positioning reference signal resource 1 in slot 1. The first communication device may also transmit SCI2, which indicates that the first communication device will transmit the 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 receives a positioning reference signal from the first communication device based on the first SCI.

[0309] Specifically, as shown in FIG. 7 , a first communication device may transmit positioning reference signals 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. A second communication device may receive the positioning reference signals 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 to the first communication device based on the positioning reference signals. 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 present application, the first communication device determines an SCI, which 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 corresponding 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 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. The M positioning reference signal resources are part or all of the P preconfigured positioning reference signal resources, and 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 granularity of resource reservation performed by the terminal device is the reference signal resource, and the P preconfigured positioning reference signal resources may be flexibly configured in a preconfigured manner. This helps 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 determine, based on the SCI, that the first communication device transmits positioning reference signals on M positioning reference signal resources within the 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 sidelink positioning between the first communication device and the second communication device.

[0311] The following describes a first communication device provided in an embodiment of this application. Please refer to Figure 13. Figure 13 is a structural diagram of the first communication device according to an embodiment of this application. The first communication device may be configured to perform the steps performed by the first communication device in the embodiment shown in Figure 6. For details, please refer to the related descriptions in the above method embodiment.

[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 referred to as a communication interface or a communication unit. The processing module 1302 is configured to perform processing operations.

[0314] Optionally, the first communications 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 the instructions and / or data in the storage module, thereby causing the communications device to implement the method embodiment shown in FIG.

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

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

[0317] It should be noted that the first communication device 1300 may include a transmitting module but not 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 a transmitting operation and a receiving operation. The first communication device 1300 may perform the following solutions.

[0318] The processing module 1302 is configured to determine an SCI, the SCI being for indicating or reserving 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 both M and N are integers greater than or equal to 1, and the N time units include P pre-configured positioning reference signal resources, or a resource pool in which the N time units are located includes the P pre-configured positioning reference signal resources, and 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 transceiver module 1301 is configured to transmit the SCI to the second communication device.

[0319] In a possible implementation, the SCI is for further indicating or further reserving N time units.

[0320] In another possible implementation, the SCI includes a first field, and the first field is for indicating or reserving M positioning reference signal resources.

[0321] In another possible implementation, 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 another possible implementation manner, when N time units include P preconfigured positioning reference signal resources, each time unit includes the same number of preconfigured 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 preconfigured 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 preconfigured positioning reference signal resources included in each time unit.

[0323] In another possible implementation manner, when the resource pool in which the 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 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.

[0324] In another possible implementation, the length of the first field satisfies the following condition:

number

[0325]

number

number

number

number

[0326] In another possible implementation, the length of the first field satisfies the following condition:

number

[0327]

number

number

number

number

[0328] In another possible implementation, the length of the first field satisfies the following condition:

number

[0329] N slprs represents the number of pre-configured 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 equal to or greater than 1. k1 is an integer equal to or greater than 0, or is determined according to a system coefficient. For example, k1=k0, k1=k reserve or k1=N slprs is.

[0330] In another possible implementation, the length of the first field satisfies the following condition:

number

[0331] N slprs represents the number of pre-configured 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 another possible implementation, a=k0, a=kreserve or k1=N slprs is.

[0332] In another possible implementation, the length of the first field satisfies the following condition:

number

[0333] Q represents the number of pre-configured positioning reference signal resources 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 equal to or greater than 1, and k1 is an integer equal to or greater than 0, or k1 is determined according to a system coefficient. For example, k1=k0, k1=k reserve Or k1=Q.

[0334] In another possible implementation, the length of the first field satisfies the following condition:

number

[0335] Q represents the number of pre-configured positioning reference signal resources 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 a is an integer greater than or equal to 0. In a possible implementation, a=0 or a=1. In another possible implementation, a=k0, a=k reserve Or k1=Q.

[0336] In another possible implementation, 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 another possible implementation, when the SCI is only for indicating or reserving positioning reference signal resources within one time unit, the length of the first field is 4 bits, or When the SCI is for indicating or reserving positioning reference signal resources within two time units, the length of the first field is 8 bits, or When the SCI is for indicating or reserving positioning reference signal resources within three time units, the length of the first field is 12 bits.

[0339] In another possible implementation, 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 time unit of the two time units, and the four least significant bits in the first field indicate the positioning reference signal resource in the second time unit of the two time units.

[0340] Another possible implementation is k reserve is indicated by RRC signaling. For example, in a possible implementation, k reserve is indicated by using an information element in the configuration signaling related to the sidelink resource pool in the RRC signaling. For example, k reserve is indicated by using the Maximum Sidelink Reservation (sl-MaxNumPerReserve) information element in configuration signaling related to the sidelink resource pool in RRC signaling.

[0341] In another possible implementation, the calculation formula for the length of the first field may indicate that the length of the first field is related to the maximum number of resources or the maximum number of time units that can be indicated in each sidelink control signaling transmission.

[0342] In another possible implementation, the formula for calculating the length of the first field is k reserve k positioning reference signal resources reserve It may also indicate that only k0 positioning reference signal resources need to be indicated. The other k0 positioning reference signal resources are indicated in other manners. For example, the k0 positioning reference signal resources are indicated by using frequency domain location information or time domain location information of a PSCCH carrying control signaling (e.g., SCI). Optionally, the frequency domain location information includes a start frequency or bandwidth. The start frequency includes a start RB, a start subchannel, any other frequency-related information, etc. The bandwidth includes a bandwidth size, for example, the number of RBs, the number of subchannels, or the number of REs. The time domain location information includes information such as a slot, a start symbol, a subframe, and / or a frame.

[0343] In another possible implementation, the value of the first field satisfies the following condition: I1 + I2 × N slprs +…I N ×(N slprs ) N-1 or I1+I2×N slprs +…I N ×(N slprs ) N-1 +Y, where I1 represents the index of the positioning reference signal resource in 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 in the second time unit among the N time units indicated or reserved by the SCI, and I N is the index of the positioning reference signal resource in 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 coded starting 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 may be an integer, and Y may be equal to -1, -2, -3, 0, 1, 2, 3, etc.

[0344] In another possible implementation, the value of the first field satisfies 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, where I1 represents the index of the positioning reference signal resource in 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 in the second time unit among the N time units indicated or reserved by the SCI, and I N is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the SCI, and N slprs represents 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 coded starting 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 may be an integer, and Y may be equal to -1, -2, -3, 0, 1, 2, 3, etc.

[0345] In another possible implementation, the value of the first field satisfies the following condition: I1 + I2 × Q + … I N ×(Q) N-1 or I1 + I2 × Q + … I N ×(Q) N-1+Y, where I1 represents the index of the positioning reference signal resource in 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 in the second time unit among the N time units indicated or reserved by the SCI, and I N where Y is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the 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 coded starting from 0. Y is a constant, and Y is pre-defined 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.

[0346] In another possible implementation, the value of the first field satisfies the following condition: I1 + I2 × Q + … I N ×(Q) N-1 -1 or I1+I2×Q+…I N ×(Q) N-1 -1+Y, where I1 represents the index of the positioning reference signal resource in 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 in the second time unit among the N time units indicated or reserved by the SCI, and I N where Y is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the 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 coded from 1. Y is a constant, and Y is pre-defined 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.

[0347] In another possible implementation, the SCI includes a first field, which is for indicating or reserving M positioning reference signal resources and N time units.

[0348] In another possible implementation manner, the frequency bands occupied by different positioning reference signal resources among the P preconfigured positioning reference signal resources have overlapping portions.

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

[0350] In another possible implementation manner, when N time units include P pre-configured positioning reference signal resources, the configurations of the pre-configured positioning reference signal resources included in different time units are the same.

[0351] In another possible implementation, the transceiver module 1301 is further configured to receive DCI from the third communication device, the DCI instructing the first communication device 1300 to reserve M positioning reference signal resources.

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

[0353] In another possible implementation manner, the transceiver module 1301 is further configured to receive configuration information from a third communication device, the configuration information being for configuring the P pre-configured positioning reference signal resources.

[0354] In another possible implementation, the SCI further comprises a second field, which is for reserving N time units.

[0355] In another possible implementation, 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, the length of the second field is 5 bits when N time units include 2 slots, or 9 bits when N time units include 3 slots.

[0357] In another possible implementation manner, when N time units include P preconfigured positioning reference signal resources, different positioning reference signal resources among the preconfigured 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 include P preconfigured positioning reference signal resources, different positioning reference signal resources among the preconfigured positioning reference signal resources included in each time unit satisfy a time division multiplexing relationship on the same frequency domain resource; or when N time units include P preconfigured positioning reference signal resources, in the preconfigured positioning reference signal resources included 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] The following describes a second communication device provided in an embodiment of this application. Please refer to Figure 14. Figure 14 is a structural diagram of the second communication device according to an embodiment of this application. The second communication device may be configured to perform the steps performed by the second communication device in the embodiment shown in Figure 6. For details, please refer to the related descriptions in the above method embodiment.

[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 referred to as a communication interface or a communication unit. The processing module 1402 is configured to perform processing operations.

[0361] Optionally, the second communications 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 the instructions and / or data in the storage module, thereby causing the communications device to implement the method embodiment shown in FIG.

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

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

[0364] It should be noted that the second communication device 1400 may include a transmitting module but not 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 a transmitting operation and a receiving operation. 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, the SCI being for indicating or reserving 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, both M and N being integers greater than or equal to 1, the N time units including P preconfigured positioning reference signal resources, or a resource pool in which the N time units are located includes P preconfigured positioning reference signal resources, the M positioning reference signal resources being some or all of the P preconfigured positioning reference signal resources, P being an integer greater than or equal to 1, and receive a positioning reference signal from the first communication device based on the SCI.

[0366] In a possible implementation, the SCI is for further indicating or further reserving N time units.

[0367] In another possible implementation, the SCI includes a first field, and the first field is for indicating or reserving M positioning reference signal resources.

[0368] In another possible implementation, 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 another possible implementation manner, when N time units include P preconfigured positioning reference signal resources, each time unit includes the same number of preconfigured positioning reference signal resources, and 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 preconfigured 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 preconfigured positioning reference signal resources included in each time unit.

[0370] In another possible implementation manner, when the resource pool in which the 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 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.

[0371] In another possible implementation, the length of the first field satisfies the following condition:

number

number

number

number

number

[0372] In another possible implementation, the length of the first field satisfies the following condition:

number

number

number

number

number

[0373] In another possible implementation, the length of the first field satisfies the following condition:

number

[0374] N slprs represents the number of pre-configured 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 equal to or greater than 1. k1 is an integer equal to or greater than 0, or is determined according to a system coefficient. For example, k1=k0, k1=k reserve or k1=N slprs is.

[0375] In another possible implementation, the length of the first field satisfies the following condition:

number

[0376] N slprs represents the number of pre-configured 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 another possible implementation, a=k0, a=k reserve or k1=N slprs is.

[0377] In another possible implementation, the length of the first field satisfies the following condition:

number

[0378] Q represents the number of pre-configured positioning reference signal resources in the resource pool, and k reserverepresents 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 k1 is an integer greater than or equal to 0, or k1 is determined according to a system coefficient, for example, k1=k0, k1=k reserve Or k1=Q.

[0379] In another possible implementation, the length of the first field satisfies the following condition:

number

[0380] Q represents the number of pre-configured positioning reference signal resources 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 a is an integer greater than or equal to 0. In a possible implementation, a=0 or a=1. In another possible implementation, a=k0, a=k reserve Or k1=Q.

[0381] In another possible implementation, 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 another possible implementation, when the SCI is only for indicating or reserving positioning reference signal resources within one time unit, the length of the first field is 4 bits, or When the SCI is for indicating or reserving positioning reference signal resources within two time units, the length of the first field is 8 bits, or When the SCI is for indicating or reserving positioning reference signal resources within three time units, the length of the first field is 12 bits.

[0384] In another possible implementation, 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 time unit of the two time units, and the four least significant bits in the first field indicate the positioning reference signal resource in the second time unit of the two time units.

[0385] Another possible implementation is k reserve is indicated by RRC signaling. For example, in a possible implementation, k reserve is indicated by using an information element in the configuration signaling related to the sidelink resource pool in the RRC signaling. For example, k reserve is indicated by using the Maximum Sidelink Reservation (sl-MaxNumPerReserve) information element in configuration signaling related to the sidelink resource pool in RRC signaling.

[0386] In another possible implementation, the calculation formula for the length of the first field may indicate that the length of the first field is related to the maximum number of resources or the maximum number of time units that can be indicated in each sidelink control signaling transmission.

[0387] In another possible implementation, the formula for calculating the length of the first field is k reserve k positioning reference signal resources reserveIt may also indicate that only k0 positioning reference signal resources need to be indicated. The other k0 positioning reference signal resources are indicated in other manners. For example, the k0 positioning reference signal resources are indicated by using frequency domain location information or time domain location information of a PSCCH carrying control signaling (e.g., SCI). Optionally, the frequency domain location information includes a start frequency or bandwidth. The start frequency includes RB, start subchannel, any other frequency-related information, etc. The bandwidth includes a bandwidth size, for example, the number of RBs, the number of subchannels, or the number of REs. The time domain location information includes information such as a slot, a start symbol, a subframe, and / or a frame.

[0388] In another possible implementation, the value of the first field satisfies the following condition: I1 + I2 × N slprs +…I N ×(N slprs ) N-1 or I1+I2×N slprs +…I N ×(N slprs ) N-1 Satisfy +Y.

[0389] I1 represents the index of the positioning reference signal resource in the first time unit of the N time units indicated or reserved by the SCI, I2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated or reserved by the SCI, and I N is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the SCI, and N slprs represents 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 coded starting 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 may be an integer, and Y may be equal to -1, -2, -3, 0, 1, 2, 3, etc.

[0390] In another possible implementation, the value of the first field satisfies 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, where I1 represents the index of the positioning reference signal resource in 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 in the second time unit among the N time units indicated or reserved by the SCI, and I N is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the SCI, and N slprs represents 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 coded starting 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 may be an integer, and Y may be equal to -1, -2, -3, 0, 1, 2, 3, etc.

[0391] In another possible implementation, the value of the first field satisfies the following condition: I1 + I2 × Q + … I N ×(Q) N-1 or I1 + I2 × Q + … I N ×(Q) N-1 +Y, where I1 represents the index of the positioning reference signal resource in 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 in the second time unit among the N time units indicated or reserved by the SCI, and I Nwhere Y is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the 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 coded starting from 0. Y is a constant, and Y is pre-defined 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.

[0392] In another possible implementation, the value of the first field satisfies the following condition: I1 + I2 × Q + … I N ×(Q) N-1 -1 or I1+I2×Q+…I N ×(Q) N-1 -1+Y, where I1 represents the index of the positioning reference signal resource in 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 in the second time unit among the N time units indicated or reserved by the SCI, and I N where Y is the index of the positioning reference signal resource in the Nth time unit among the N time units indicated or reserved by the 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 coded from 1. Y is a constant, and Y is pre-defined 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.

[0393] In another possible implementation, the SCI includes a first field, which is for indicating or reserving M positioning reference signal resources and N time units.

[0394] In another possible implementation manner, the frequency bands occupied by different positioning reference signal resources among the P preconfigured positioning reference signal resources have overlapping portions.

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

[0396] In another possible implementation manner, when N time units include P pre-configured positioning reference signal resources, the configurations of the pre-configured positioning reference signal resources included in different time units are the same.

[0397] In another possible implementation, the SCI further comprises a second field, which is for reserving N time units.

[0398] In another possible implementation, 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, the length of the second field is 5 bits when N time units include 2 slots, or 9 bits when N time units include 3 slots.

[0400] In another possible implementation manner, when N time units include P preconfigured positioning reference signal resources, different positioning reference signal resources among the preconfigured 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 include P preconfigured positioning reference signal resources, different positioning reference signal resources among the preconfigured positioning reference signal resources included in each time unit satisfy a time division multiplexing relationship on the same frequency domain resource; or when N time units include P preconfigured positioning reference signal resources, in the preconfigured positioning reference signal resources included 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] FIG. 15 is a diagram of a possible configuration of the first communication device or the second communication device as a terminal device below.

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

[0403] The processor is mainly configured to process communication protocols and communication data, control terminal devices, execute software programs, process data of software programs, etc. The memory is mainly configured to store software programs and data.

[0404] The radio frequency circuit is mainly configured to perform conversion between baseband signals and radio frequency signals and process the radio frequency signals.

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

[0406] An input / output device such as a touch screen, a display or a keyboard is primarily configured to receive data input by a user and output data to a user.

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

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

[0409] For ease of explanation, FIG. 15 shows only one memory and one processor. In an actual terminal device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium, a storage device, etc. The memory may be located independently of the processor or may be integrated with the processor. This is not limited to the embodiments of this application.

[0410] In this embodiment of the present application, the antenna and the radio frequency circuit having the transceiver function may be considered as a transceiver unit of the terminal device, and the processor having the processing function may be considered as a processing unit of the 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, a transceiver machine, a transceiver device, etc. The processing unit may also be called a processor, a processing board, a processing module, a processing device, etc.

[0411] Optionally, components configured to implement a receiving function within the transceiver unit 1510 may be considered a receiving unit, and components configured to implement a 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 circuitry, etc. The receiving unit may also be referred to as a receiving machine, receiver, receiving circuitry, etc. The transmitting unit may also be referred to as a transmitting machine, transmitter, transmitting circuitry, etc.

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

[0413] When the first communication device or the 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 may be a processor, a microprocessor, an integrated circuit, or a logic circuit integrated on the chip.

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

[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 separately connected via a bus, with the memory storing 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 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 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 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 of the transceiver 1603 will not be described again.

[0419] An embodiment of the present application further provides a communication system, the communication system including 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] An embodiment of the present application further provides a computer program product including instructions, which, when executed on a computer, enable the computer to perform the method in the embodiment shown in FIG.

[0421] An embodiment of this application further provides a computer-readable storage medium containing computer instructions, which, when executed on a computer, enable the computer to perform the method in the embodiment shown in FIG.

[0422] An embodiment of the present application further provides a chip device including a processor connected to a memory and configured to call a program stored in the memory, such that the processor performs the method in the embodiment shown in FIG.

[0423] Any of the above processors may be a general-purpose central processing unit, a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to control program execution of the method in the embodiment shown in Figure 6. Any of the above mentioned memories may be read-only memory (ROM), other types of static storage devices capable of storing static information and instructions, random access memory (RAM), etc.

[0424] For the purpose of convenient and concise description, it can be clearly understood by those skilled in the art that the detailed operation processes of the above systems, devices and units may refer to the corresponding processes in the above method embodiments, and the details will not be described again here.

[0425] In some embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be realized in other ways. For example, the above-described device embodiments are merely examples. For example, the division of units is merely a logical division of function, and other divisions may occur in actual implementations. For example, multiple units or components may be combined or integrated into other systems, or some features may be ignored or not implemented. Furthermore, the shown or discussed mutual couplings or direct couplings or communication connections may be realized by using some interfaces. Indirect couplings or communication connections between devices or units may be realized in electronic, mechanical, or other forms.

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

[0427] Furthermore, the functional units in the embodiments of this application may be integrated into one processing unit, each of the units may exist physically alone, or two or more units may be integrated into one unit, and the integrated unit may be realized in the form of hardware or in the form of a software functional unit.

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

[0429] The above embodiments are intended to merely describe the technical solutions of this application, other than to limit this application. Although this application has been described in detail with reference to the above embodiments, those skilled in the art should understand that, without departing from the spirit and scope of the technical solutions of the embodiments of this application, they may still make modifications to the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features thereof.

Claims

1. A resource indication method, comprising: determining, by the first communication device, 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, both M and N being integers greater than or equal to 1, the N time units including P pre-configured positioning reference signal resources, or a resource pool in which the N time units are located includes P pre-configured positioning reference signal resources, the M positioning reference signal resources being some or all of the P pre-configured positioning reference signal resources, P being an integer greater than or equal to 1; transmitting, by the first communication device, the SCI to a second communication device; A method comprising:

2. A resource indication method, comprising: receiving, by a second communication device, an SCI from a first communication device, 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 pre-configured positioning reference signal resources, or a resource pool in which the N time units are located includes P pre-configured positioning reference signal resources, and 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; receiving, by the second communication device, a positioning reference signal from the first communication device based on the SCI; A method comprising:

3. The method of claim 1 or 2, wherein the SCI further indicates the N time units.

4. The method of claim 1 , wherein the SCI includes a first field, the first field indicating the M positioning reference signal resources.

5. The method of claim 4 , wherein the length of the first field is determined based on a maximum number of time units or a maximum number of positioning reference signal resources that can be indicated by the SCI.

6. when the N time units include the P preconfigured positioning reference signal resources, each time unit includes the same number of preconfigured 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 6. The method of claim 5, wherein the length of the first field is determined based on a maximum number of the positioning reference signal resources that can be indicated by the SCI and a number of the pre-configured positioning reference signal resources included in each time unit.

7. When the resource pool in which the N time units are located includes the P preconfigured 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 6. The method of claim 5, wherein the length of the first field is determined based on a maximum number of the positioning reference signal resources that can be indicated by the SCI and a number of pre-configured positioning reference signal resources included in the resource pool.

8. The length of the first field satisfies the following conditions: [Equation 1] Fulfilling where: [Equation 2] teeth [Equation 3] represents rounding relative to [Equation 4] is base 2 [Equation 5] represents the calculation of the logarithm of N slprs represents the number of pre-configured positioning reference signal resources included in each time unit, and K reserve The method according to claim 4 , wherein ∑ 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. The length of the first field satisfies the following conditions: [Equation 6] Fulfilling where N slprs represents the number of pre-configured 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; and k 0 is an integer greater than or equal to 1, and k 1 is an integer greater than or equal to 0, or k 1 7. The method of claim 4, wherein is determined based on system coefficients.

10. k 1 =k 0 , k 1 =k reserve or k 1 =N slprs The method of claim 9, wherein

11. The length of the first field satisfies the following conditions: [Equation 7] Fulfilling where N slprs represents the number of pre-configured 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; and k 0 7. The method according to claim 4, wherein a is an integer greater than or equal to 1 and a is an integer greater than or equal to 0.

12. a=0, a=1, a=k 0 , a=k reserve or k 1 =N slprs The method of claim 11, wherein

13. The length of the first field satisfies the following conditions: [Equation 8] Fulfilling where: [Equation 9] teeth [Equation 10] represents rounding relative to [0011] is base 2 [0012] where Q represents the number of pre-configured positioning reference signal resources included in the resource pool, and K reserve The method of claim 4, 5 or 7, wherein ≠ 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.

14. The length of the first field satisfies the following conditions: [0013] Fulfilling where Q represents the number of the 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, 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; and k 0 is an integer greater than or equal to 1, and k 1 is an integer greater than or equal to 0, or k 1 8. The method of claim 4, 5 or 7, wherein is determined based on system coefficients.

15. k 1 =k 0 , k 1 =k reserve or k 1 15. The method of claim 14, wherein Q is .

16. The length of the first field satisfies the following conditions: [0014] Fulfilling where Q represents the number of the 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, 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; and k 0 The method of claim 4, 5 or 7, wherein is an integer of 1 or more, and a is an integer of 0 or more.

17. a=0, a=1, a=k 0 , a=k reserve or k 1 17. The method of claim 16, wherein Q is .

18. 18. The method of claim 4, wherein the length of the first field is 4 bits, 8 bits, or 12 bits.

19. When the SCI is for indicating or reserving only positioning reference signal resources within one time unit, the length of the first field is 4 bits; When the SCI is for indicating or reserving positioning reference signal resources within two time units, the length of the first field is 8 bits; or 19. The method of claim 18, wherein when the SCI is for indicating or reserving positioning reference signal resources within three time units, the length of the first field is 12 bits.

20. 20. The method of claim 18 or 19, wherein the length of the first field is 8 bits, the four most significant bits in the first field indicate a positioning reference signal resource in a first time unit of the two time units, and the four least significant bits in the first field indicate a positioning reference signal resource in a second time unit of the two time units.

21. The value of the first field satisfies the following conditions: 1 +I 2 ×N slprs +…I N ×(N slprs ) N-1 where I 1 represents the index of the positioning reference signal resource in the first time unit among the N time units indicated by the SCI, and I 2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated by the SCI, and I N is the index of the positioning reference signal resource in the N-th time unit among the N time units indicated by the SCI, and N slprs represents the number of the 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 coded from 0; or The value of the first field satisfies the following conditions: 1 +I 2 ×N slprs +…I N ×(N slprs ) N-1 -1, where I 1 represents the index of the positioning reference signal resource in the first time unit among the N time units indicated by the SCI, and I 2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated by the SCI, and I N is the index of the positioning reference signal resource in the N-th time unit among the time units indicated by the SCI, and N slprs 21. The method of claim 4, wherein N represents the number of preconfigured positioning reference signal resources included in each time unit, and the indices of the preconfigured positioning reference signal resources included in each of the N time units are coded from 1.

22. The value of the first field satisfies the following conditions: 1 +I 2 ×Q+…I N ×(Q) N-1 where I 1 represents the index of the positioning reference signal resource in the first time unit among the N time units indicated by the SCI, and I 2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated by the SCI, and I N is an index of a positioning reference signal resource in the N-th time unit among 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 indexes of the pre-configured positioning reference signal resources included in the resource pool are coded from 0; or The value of the first field satisfies the following conditions: 1 +I 2 ×Q+…I N ×(Q) N-1 -1, where I 1 represents the index of the positioning reference signal resource in the first time unit among the N time units indicated by the SCI, and I 2 represents the index of the positioning reference signal resource in the second time unit of the N time units indicated by the SCI, and I N 21. The method of claim 4, wherein Q is an index of a positioning reference signal resource in an N-th time unit among 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 indexes of the pre-configured positioning reference signal resources included in the resource pool are coded from 1.

23. 23. The method of claim 1, wherein frequency bands occupied by different ones of the P preconfigured positioning reference signal resources have an overlap.

24. 23. The method of claim 1, wherein each positioning reference signal resource among the P preconfigured positioning reference signal resources occupies part or all of the bandwidth of the resource pool.

25. 25. The method of claim 1, wherein when the N time units include the P preconfigured positioning reference signal resources, the configurations of the preconfigured positioning reference signal resources included in different time units are the same.

26. 26. The method of claim 1, further comprising receiving, by the first communication device, downlink control information (DCI) from a third communication device, the DCI instructing the first communication device to reserve the M positioning reference signal resources.

27. 27. The method of claim 26, wherein the DCI further instructs the first communication device to reserve the N time units.

28. 28. The method of claim 1, further comprising receiving, by the first communication device, configuration information from the third communication device, the configuration information for configuring the P pre-configured positioning reference signal resources.

29. a first communication device, the first communication device includes a transceiver module and a processing module; 29. A first communications device, wherein the transceiver module is configured to perform receiving and transmitting operations as recited in any one of claims 1 and 3 to 28, and the processing module is configured to perform processing operations as recited in any one of claims 1 and 3 to 28.

30. a second communication device, the second communication device includes a transceiver module; A second communications device, wherein the transceiver module is configured to perform receiving and transmitting operations according to any one of claims 2 to 25.

31. A communication device, 28. The communications device, comprising a processor, the processor being configured to execute a computer program or computer instructions in a memory to perform the method of any one of claims 1 and 3 to 28, or the method of any one of claims 2 to 25.

32. 32. The communication device of claim 31, wherein the communication device further comprises the memory.

33. 1. A computer-readable storage medium, comprising: The computer-readable storage medium stores a computer program that, when executed by a communication device, enables the communication device to perform the method of any one of claims 1 and 3 to 28, or the method of any one of claims 2 to 25.

Images