SL PRS sending method, receiving method, device, medium and product

Abstract

The invention discloses an SL PRS sending method, an SL PRS receiving method, an SL PRS sending device, an SL PRS receiving device, a medium and a product, and belongs to the field of positioning signal measurement. The method comprises the following steps: sending / receiving first information at a first side channel resource, and sending / receiving a first SL PRS at a first SL PRS resource; wherein the first information is used for indicating a sending mode of the SL PRS in the first SL PRS resource. According to the method, measurement based on the sidewalk positioning reference signal between the terminals in sidewalk communication is realized.

Description

Technical Field

[0001] This application relates to the field of positioning signal measurement, and particularly to a method and apparatus for transmitting and receiving SL PRS, a medium, and a product. Background Art

[0002] In Release 17 of the 3rd Generation Partnership Project (3GPP), the 3GPP Radio Access Network (RAN) studied "New Radio (NR) positioning enhancements" and "Scenarios and requirements for in-coverage, partial-coverage, and out-of-coverage NR positioning use cases". The study of "Scenarios and requirements for in-coverage, partial-coverage, and out-of-coverage NR positioning use cases" focused on V2X and public safety use cases.

[0003] 3GPP needs to research and develop sidelink positioning solutions to support the use cases, scenarios, and requirements identified in these activities. To improve positioning accuracy, especially for terminals located outside the coverage of the cellular network, 3GPP introduced positioning based on sidelink positioning reference signals in Release 18 (R18). Summary of the Invention

[0004] This application provides a method and apparatus for transmitting and receiving SL PRS, a medium, and a product. The technical solutions are as follows:

[0005] According to one aspect of this application, a method for transmitting a sidelink positioning reference signal (SL PRS) is provided. The method is executed by a first terminal and includes:

[0006] Transmitting first information on a first sidelink channel resource and transmitting a first SL PRS on a first SL PRS resource;

[0007] Wherein, the first information is used to indicate the transmission mode of the SL PRS within the first SL PRS resource.

[0008] According to one aspect of this application, a method for receiving SL PRS is provided. The method is executed by a second terminal and includes:

[0009] Receiving first information on a first sidelink channel resource and receiving a first SL PRS on a first SL PRS resource;

[0010] Wherein, the first information is used to indicate the sending manner of the SL PRS within the first SL PRS resource.

[0011] According to another aspect of the present application, there is provided a sending device for SL PRS, the device comprising:

[0012] A sending module, configured to send the first information on a first sidelink channel resource and send a first SL PRS on a first SL PRS resource;

[0013] Wherein, the first information is used to indicate the sending manner of the SL PRS within the first SL PRS resource.

[0014] According to another aspect of the present application, there is provided a receiving device for SL PRS, the device comprising:

[0015] A receiving module, configured to receive the first information on a first sidelink channel resource and receive a first SL PRS on a first SL PRS resource;

[0016] Wherein, the first information is used to indicate the sending manner of the SL PRS within the first SL PRS resource.

[0017] According to another aspect of the present application, there is provided a terminal, the terminal comprising:

[0018] A processor;

[0019] A transceiver connected to the processor;

[0020] A memory for storing executable instructions of the processor;

[0021] Wherein, the processor is configured to load the executable instructions to enable the terminal to implement the SL PRS sending method or the SL PRS receiving method as described in the above aspect.

[0022] According to another aspect of the embodiments of the present application, there is provided a computer-readable storage medium, in which a computer program is stored, and the computer program is used to be executed by a processor of a terminal to implement the SL PRS sending method or the SL PRS receiving method as described in the above aspect.

[0023] According to another aspect of the embodiments of the present application, there is provided a chip, the chip comprising programmable logic circuits and / or program instructions, and when a terminal installed with the chip runs, it is used to implement the SL PRS sending method or the SL PRS receiving method as described in the above aspect.

[0024] According to another aspect of the embodiments of the present application, there is provided a computer program product (or computer program), the computer program product (or computer program) includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and a processor of a terminal reads and executes the computer instructions to implement the SL PRS sending method or the SL PRS receiving method described in the above aspect.

[0025] The technical solutions provided by the embodiments of the present application at least include the following beneficial effects:

[0026] In the above SL PRS sending and receiving methods, a terminal can perform sidelink communication through a first sidelink channel resource and a first SL PRS resource associated with the sidelink, send or receive first information on the first sidelink channel resource, and send or receive SL PRS on the first SL PRS resource according to the SL PRS sending method indicated by the first information, so as to implement the measurement based on the sidelink positioning reference signal between terminals in sidelink communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 is a schematic diagram of a sidelink communication scenario provided by an exemplary embodiment of the present application;

[0029] Figure 2 is a schematic diagram of a sidelink communication scenario provided by another exemplary embodiment of the present application;

[0030] Figure 3 is a schematic diagram of a sidelink communication scenario provided by another exemplary embodiment of the present application;

[0031] Figure 4 is a flowchart of a method for sending SL PRS provided by an exemplary embodiment of the present application;

[0032] Figure 5 is a flowchart of a method for receiving SL PRS provided by an exemplary embodiment of the present application;

[0033] Figure 6 is a flowchart of a method for transmitting SL PRS provided by an exemplary embodiment of the present application;

[0034] Figure 7It is a schematic diagram of a time-frequency structure provided by an exemplary embodiment of the present application;

[0035] Figure 8 It is a schematic diagram of a time-frequency structure provided by another exemplary embodiment of the present application;

[0036] Figure 9 It is a schematic diagram of a time-frequency structure provided by another exemplary embodiment of the present application;

[0037] Figure 10 It is a schematic diagram of a time-frequency structure provided by another exemplary embodiment of the present application;

[0038] Figure 11 It is a schematic diagram of a time-frequency structure provided by another exemplary embodiment of the present application;

[0039] Figure 12 It is a schematic diagram of a time-frequency structure provided by another exemplary embodiment of the present application;

[0040] Figure 13 It is a schematic diagram of a time-frequency structure provided by another exemplary embodiment of the present application;

[0041] Figure 14 It is a schematic diagram of a time-frequency structure provided by another exemplary embodiment of the present application;

[0042] Figure 15 It is a block diagram of a transmission device of SL PRS provided by an exemplary embodiment of the present application;

[0043] Figure 16 It is a block diagram of a receiving device of SL PRS provided by an exemplary embodiment of the present application;

[0044] Figure 17 It is a schematic diagram of the structure of a terminal provided by an exemplary embodiment of the present application. Detailed implementation manners

[0045] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings. Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0046] The terms used in this disclosure are for the purpose of describing particular embodiments only and are not intended to limit the disclosure. The singular forms "a", "the", and "said" used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0047] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0048] Sidelink communication under different network coverage environments

[0049] In sidelink communication, according to the network coverage situation where the terminal is located, it can be divided into in-network-coverage sidelink communication, partial-network-coverage sidelink communication, and out-of-network-coverage sidelink communication.

[0050] As Figure 1 shown, in in-network-coverage sidelink communication, all terminals performing sidelink communication are within the coverage of the same base station. Thus, the above terminals can all perform sidelink communication based on the same sidelink configuration by receiving the configuration signaling from the base station.

[0051] As Figure 2 shown, in the case of partial-network-coverage sidelink communication, some terminals performing sidelink communication are within the coverage of the base station. These terminals can receive the configuration signaling from the base station and perform sidelink communication according to the configuration of the base station. For the terminals located outside the network coverage, they cannot receive the configuration signaling from the base station. In this case, the terminals outside the network coverage will determine the sidelink configuration according to the pre-configuration information and the information carried in the Physical Sidelink Broadcast Channel (PSBCH) sent by the terminals within the network coverage, and perform sidelink communication.

[0052] As Figure 3 shown, for out-of-network-coverage sidelink communication, all terminals performing sidelink communication are outside the network coverage, and all terminals determine the sidelink configuration according to the pre-configuration information and perform sidelink communication.

[0053] Positioning based on sidelink

[0054] In 3GPP R17, 3GPP RAN studied "NR positioning enhancement" and "Scenarios and requirements for in-coverage, partial-coverage, and out-of-coverage NR positioning use cases". The study of "Scenarios and requirements for in-coverage, partial-coverage, and out-of-coverage NR positioning use cases" focused on V2X and public safety use cases, and the results were recorded in TR38.845. In addition, SA1 developed the requirements for "range-based services" in TS22.261 and the positioning accuracy requirements for Internet of Things (IoT) usage in out-of-coverage scenarios in TS22.104. 3GPP needs to research and develop sidelink positioning solutions to support the use cases, scenarios, and requirements identified in these activities. To improve positioning accuracy, especially for terminals located outside the coverage of the cellular network, 3GPP introduced positioning based on sidelink positioning reference signals in R18. According to the current conclusion, the sidelink positioning reference signal SL PRS can be sent within a dedicated resource pool. However, to support sidelink positioning and sidelink communication, the terminal also needs to send and receive sidelink positioning-related terminal discovery information, configuration information, measurement reporting information, as well as sidelink communication-related control and data information, etc., and these information need to be carried through sidelink channels, such as PSCCH and / or PSSCH.

[0055] On the sidelink, when the SL PRS and sidelink signals / channels are sent in the same time slot, how the SL PRS should be multiplexed with other sidelink signals / channels in the same time slot is an unsolved problem. This application provides a method for sending SL PRS and a method for receiving SL PRS, which can solve the above technical problems.

[0056] Figure 4 The flowchart of the method for sending SL PRS provided by an exemplary embodiment of this application is shown. This method is executed by a first terminal. Taking the first terminal as the sending terminal, the method includes:

[0057] Step 401, send first information on a first sidelink channel resource and send a first SL PRS on a first SL PRS resource.

[0058] Among them, the first information is used to indicate the sending mode of the SL PRS within the first SL PRS resource.

[0059] Exemplarily, in the mode of independently selecting resources, the first terminal listens to the sidelink channel, and based on the channel idle condition obtained by listening, determines the first sidelink channel resource and the first SLPRS resource associated with the first sidelink channel resource; sends the first information on the first sidelink channel resource, and sends the first SLPRS on the first SLPRS resource according to the sending manner of the SL PRS indicated by the first information.

[0060] Exemplarily, in the mode of network scheduling resources, the first terminal sends the first information on the first sidelink channel resource scheduled by the network, and sends the first SLPRS on the first SLPRS resource scheduled by the network.

[0061] Optionally, the sidelink channel includes at least one of a Physical Sidelink Control Channel (PSCCH) and a Physical Sidelink Shared Channel (PSSCH).

[0062] In summary, for the SL PRS sending method provided in this embodiment, the first terminal can perform sidelink communication with the receiving terminal through the first sidelink channel resource and the first SLPRS resource associated on the sidelink, send the first information on the first sidelink channel resource, and send the SL PRS on the first SLPRS resource according to the sending manner of the SL PRS indicated by the first information, so that the receiving terminal performs measurement based on the sidelink positioning reference signal.

[0063] Figure 5 The flowchart of the SL PRS receiving method provided by an exemplary embodiment of the present application is shown. This method is executed by the second terminal. Taking the second terminal as the receiving terminal as an example, this method includes:

[0064] Step 501, receive the first information on the first sidelink channel resource and receive the first SLPRS on the first SLPRS resource.

[0065] Wherein, the first information is used to indicate the sending manner of the SL PRS within the first SLPRS resource.

[0066] Exemplarily, the second terminal listens to the sidelink channel, receives the first information from the first sidelink channel resource, obtains the first SLPRS on the first SLPRS resource according to the sending manner of the SL PRS indicated by the first information, and performs measurement of the first SLPRS.

[0067] Optionally, the sidelink channel includes at least one of PSCCH and PSSCH.

[0068] In summary, for the method of receiving SL PRS provided in this embodiment, the second terminal can perform sidelink communication with the sending terminal through the associated first sidelink channel resource and the first SL PRS resource, receive the first information on the first sidelink channel resource, and receive the SL PRS on the first SL PRS resource according to the SL PRS sending method indicated by the first information, so as to implement the measurement of the sidelink positioning reference signal provided by the sending terminal.

[0069] It should be noted that steps 401 and 501 above can also be implemented as another embodiment. For example, Figure 6 as shown, the first terminal sends the first information on the first sidelink channel resource and sends the first SL PRS on the first SL PRS resource; the second terminal receives the first information on the first sidelink channel resource and receives the first SL PRS on the first SL PRS resource.

[0070] The sidelink channel resource and the SL PRS resource allocated and used for the measurement of SL PRS can belong to the same sidelink resource pool; they can also belong to different sidelink resource pools. For example, both the sidelink channel resource and the SL PRS resource belong to the first sidelink resource pool; for example, the sidelink channel resource belongs to the first sidelink resource pool and the SL PRS resource belongs to the second sidelink resource pool.

[0071] When the associated sidelink channel resource and SL PRS resource belong to the same sidelink resource pool, the terminal sends and receives the SL PRS through the time-frequency structure. The above sidelink channel resource and SL PRS resource are associated resources in the time-frequency structure. For example, the above first sidelink channel resource and the first SL PRS resource are a group of associated resources in the time-frequency structure.

[0072] In the embodiments of the present application, the time-frequency structure includes n groups of associated sidelink channel resources and SL PRS resources. According to different configuration methods between the associated sidelink channel resources and SL PRS resources, the time-frequency structure can at least include the following three categories.

[0073] It should be noted that the time-frequency structure corresponds to one or more first time-domain units in the time domain. The first time-domain unit includes m second time-domain units, and m is an integer greater than 1. In different embodiments of the present application, the first time-domain unit can be at least one of a symbol group, a time slot, a time slot group, a subframe, and a subframe group; the second time-domain unit can be a symbol, such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol.

[0074] The following description of the three types of time-frequency structures takes the first time-domain unit as a time slot and the second time-domain unit as a symbol as an example.

[0075] The first possible time-frequency structure design:

[0076] In the time-frequency structure, n sidelink channel resources and n SL PRS resources correspond to different symbols; the n sidelink channel resources correspond to the same multiple symbols; the multiple symbols corresponding to the same SL PRS resource are continuous in the time domain; the multiple symbols corresponding to the n sidelink channel resources are multiple (i.e., at least two) continuous symbols within the same time slot.

[0077] Exemplarily, the multiple symbols corresponding to the n sidelink channel resources are partial symbols within a time slot, and the time slot to which the above n sidelink channel resources belong further includes SL PRS resources. For example, as Figure 7 shown, the sidelink channel resources correspond to the first three symbols within the same time slot.

[0078] · Sidelink channel resources

[0079] The above n sidelink channel resources respectively correspond to different frequency-domain resources, and the number of frequency-domain resources corresponding to the n sidelink channel resources is the same.

[0080] For example, as Figure 7 shown, there are 4 sidelink channel resources, namely sidelink channel resource 0, sidelink channel resource 1, sidelink channel resource 2, and sidelink channel resource 3. Sidelink channel resource 0 corresponds to the first to F resource blocks (Resource Block, RB), sidelink channel resource 1 corresponds to the (F + 1)th to 2Fth RB, sidelink channel resource 2 corresponds to the (2F + 1)th to 3Fth RB, and sidelink channel resource 3 corresponds to the (3F + 1)th to 4Fth RB; each sidelink channel resource corresponds to F RBs. Here, F is an integer greater than 1.

[0081] Optionally, the starting point of the frequency-domain resources corresponding to the above n sidelink channel resources is configured by the network. Or, the starting point of the frequency-domain resources corresponding to the above n sidelink channel resources is pre-configured by the network. Or, the starting point of the frequency-domain resources corresponding to the above n sidelink channel resources is determined based on the frequency-domain resources of the sidelink resource pool corresponding to the time slot; for example, the first physical resource block (Physical Resource Block, PRB) of the sidelink resource pool corresponding to the current time slot is used as the starting point of the frequency-domain resources corresponding to the sidelink channel resources.

[0082] Optionally, the number of frequency-domain resources corresponding to each of the above n sidelink channel resources is configured by the network. Or, the number of frequency-domain resources corresponding to each sidelink channel resource is pre-configured by the network. Or, the number of frequency-domain resources corresponding to each sidelink channel resource is determined based on n and the frequency-domain resources of the sidelink resource pool; for example, if the number of frequency-domain resources corresponding to each sidelink channel resource is denoted as F, the frequency-domain resources of the sidelink resource pool are R PRBs, and there are n sidelink channel resources in the time-frequency structure, then F = R / n. As Figure 7 shown, when n is 4, then F = R / 4.

[0083] Optionally, the first symbol among the multiple symbols corresponding to the above n sidelink channel resources is used for Automatic Gain Control (AGC). As Figure 7 shown, the n sidelink channel resources correspond to the first 3 symbols within 1 time slot, where the first symbol is used for AGC.

[0084] · SL PRS resources

[0085] The above n SL PRS resources belong to one or more SL PRS sets; the SL PRS resources belonging to the same SL PRS set correspond to the same multiple symbols. Each SL PRS set includes one or more SL PRS resources.

[0086] In the case where an SL PRS set includes multiple SL PRS resources, different SL PRS resources belonging to the same SL PRS set perform frequency-division multiplexing or code-division multiplexing when transmitting SL PRS; the SL PRS resources belonging to different SL PRS sets correspond to different multiple symbols.

[0087] For example, as Figure 7 shown, a time slot includes 2 SL PRS sets: the first SL PRS set and the second SL PRS set, and each SL PRS set includes 2 SL PRS resources; the first SL PRS set corresponds to 5 symbols from symbol 3 to symbol 7, then the 2 SL PRS resources in the first SL PRS set both correspond to the 5 symbols from symbol 3 to symbol 7; the second SL PRS set corresponds to 5 symbols from symbol 8 to symbol 12, then the 2 SL PRS resources in the second SL PRS set both correspond to the 5 symbols from symbol 8 to symbol 12.

[0088] And as Figure 7As shown, 2 SL PRS resources in the first SL PRS set perform frequency division multiplexing on R PRBs on symbols 3 to 7 when transmitting SL PRS. 2 SL PRS resources in the second SL PRS set perform frequency division multiplexing on R PRBs on symbols 8 to 12 when transmitting SL PRS.

[0089] Optionally, different SL PRS resources in the same SL PRS set have the same comb structure and different RE offsets.

[0090] For example, as Figure 7 shown, both SL PRS resource 0 and SL PRS resource 1 in the above-mentioned first SL PRS set have a comb structure with a comb size of 2. The resource element (RE) offset of SL PRS resource 0 is 0, and the RE offset of SL PRS resource 1 is 1. Both SL PRS resource 2 and SL PRS resource 3 in the second SL PRS set have a comb structure with a comb size of 2. The RE offset of SL PRS resource 2 is 0, and the RE offset of SL PRS resource 3 is 1.

[0091] Optionally, the first symbol among multiple symbols corresponding to the same SL PRS resource is used for AGC. As Figure 7 shown, in one time slot, the first symbol (i.e., symbol 3) among the 5 symbols 3 to 7 corresponding to the first SL PRS set is used for AGC; the first symbol (i.e., symbol 8) among the 5 symbols 8 to 12 corresponding to the second SL PRS set is used for AGC.

[0092] · Corresponding relationship between sidelink channel resources and SL PRS resources

[0093] The above-mentioned n sidelink channel resources and n SL PRS resources correspond to each other in sequence according to their respective indexes.

[0094] For example, the indexes of 4 sidelink channel resources are 0 - 3 in sequence, and the indexes of 4 SL PRS resources are (0,0), (0,1), (1,0), and (1,1) in sequence. The sidelink channel resource with index 0 (i.e., sidelink channel resource 0) is correspondingly associated with the SL PRS resource with index (0,0), the sidelink channel resource with index 1 (i.e., sidelink channel resource 1) is correspondingly associated with the SL PRS resource with index (0,1), the sidelink channel resource with index 2 (i.e., sidelink channel resource 2) is correspondingly associated with the SL PRS resource with index (1,0), and the sidelink channel resource with index 3 (i.e., sidelink channel resource 3) is correspondingly associated with the SL PRS resource with index (1,1).

[0095] Optionally, the indexes of the n sidelink channel resources are determined in ascending order of frequency domain. As Figure 7 shown, for the 4 sidelink channel resources in ascending order of frequency domain, the indexes are 0, 1, 2, and 3 in sequence.

[0096] Optionally, after the n SL PRS resources are sorted based on the method of first comb offset and then set index, they correspond to the n sidelink channel resources. Or, after the n SL PRS resources are sorted based on the method of first set index and then comb offset, they correspond to the n sidelink channel resources.

[0097] Exemplarily, the indexes (0, 0), (0, 1), (1, 0), and (1, 1) of the above 4 SL PRS resources can be understood as (comb offset, set index); correspondingly Figure 7 it means that (0, 0) represents the SL PRS resource 0 with a RE offset of 0 in the first SL PRS set with a set index of 0, (0, 1) represents the SL PRS resource 1 with a RE offset of 0 in the second SL PRS set with a set index of 1, (1, 0) represents the SL PRS resource 2 with a RE offset of 1 in the first SL PRS set with a set index of 0, and (1, 1) represents the SL PRS resource 3 with a RE offset of 1 in the second SL PRS set with a set index of 1.

[0098] Or, the indexes (0, 0), (0, 1), (1, 0), and (1, 1) of the above 4 SL PRS resources can be understood as (set index, comb offset); correspondingly Figure 7 it means that (0, 0) represents the SL PRS resource 0 with a RE offset of 0 in the first SL PRS set with a set index of 0, (0, 1) represents the SL PRS resource 1 with a RE offset of 1 in the first SL PRS set with a set index of 0, (1, 0) represents the SL PRS resource 2 with a RE offset of 0 in the second SL PRS set with a set index of 1, and (1, 1) represents the SL PRS resource 3 with a RE offset of 1 in the second SL PRS set with a set index of 1.

[0099] The 4 SL PRS resources correspond to the 4 sidelink channel resources in sequence: SL PRS resource 0 corresponds to sidelink channel resource 0, SL PRS resource 1 corresponds to sidelink channel resource 1, SL PRS resource 2 corresponds to sidelink channel resource 2, and SL PRS resource 3 corresponds to sidelink channel resource 3.

[0100] Optionally, in each group of associated sidelink channel resources and SL PRS resources, the time domain position of the sidelink channel resources is before the time domain position of the SL PRS resources. For example, as Figure 7As shown, the time domain position of the sidelink channel resource is from symbol 0 to 2, and the time domain position of the SL PRS resource is from symbol 3 to 12. The time domain position of the sidelink channel resource is before the time domain position of the SL PRS resource.

[0101] · Symbol for transceiver conversion

[0102] There is a symbol for transceiver conversion in the time-frequency structure.

[0103] Optionally, the symbols corresponding to the n sidelink channel resources and the symbols corresponding to the n SL PRS resources are consecutive; or, there is no symbol for transceiver conversion between the symbols corresponding to the n sidelink channel resources and the symbols corresponding to the n SL PRS resources.

[0104] That is to say, there is no symbol for transceiver conversion between the symbol corresponding to the sidelink channel resource and the symbol corresponding to the SL PRS resource; for example, as Figure 7 shown, the next symbol of the sidelink channel resource is the first symbol of the first SL PRS set. The first symbol of the first SL PRS set is used for AGC, and there is no symbol for transceiver conversion between the sidelink channel resource and the first SL PRS set.

[0105] Optionally, the symbols corresponding to at least two SL PRS sets are consecutive; or, there is no symbol for transceiver conversion between the symbols corresponding to at least two SL PRS sets.

[0106] That is to say, there is no symbol for transceiver conversion between SL PRS sets. For example, as Figure 7 shown, the next symbol of the first SLPRS set is the first symbol of the second SL PRS set. The first symbol of the second SL PRS set is used for AGC, and there is no symbol for transceiver conversion between the first SL PRS set and the second SL PRS set.

[0107] In some embodiments, the last symbol of the time-frequency structure is a symbol for transceiver conversion; or, in the mode of autonomously selecting resources, the last symbol of the time-frequency structure is a symbol for transceiver conversion.

[0108] Such as Figure 7 shown, the last symbol of the time slot is a symbol for transceiver conversion. Autonomously selecting resources means that the terminal autonomously selects resources from the sidelink resource pool for SL PRS transmission.

[0109] In some embodiments, in the mode of network scheduling resources and when the first condition is met, the last symbol of the time-frequency structure is a symbol for transmitting or receiving SL PRS.

[0110] Optionally, the first terminal is a sending terminal, and the first condition includes at least one of the following:

[0111] The first terminal is configured to send SL PRS within the last SL PRS set for the second terminal to measure the Reference Signal Time Difference (RSTD);

[0112] The SL PRS set in the next time-frequency structure is configured to measure RSTD.

[0113] Exemplarily, the second terminal is a receiving terminal. Network scheduling means that the network device schedules time-frequency resources for the terminal. For example, the base station schedules sidelink channel resources and SL PRS resources for the terminal.

[0114] The second possible time-frequency structure design:

[0115] In the time-frequency structure, n sidelink channel resources and n SL PRS resources correspond to different symbols; the n sidelink channel resources correspond to the same multiple symbols; the multiple symbols corresponding to the same SL PRS resource are continuous in the time domain; the multiple symbols corresponding to the n sidelink channel resources are all the symbols within the same time slot.

[0116] Exemplarily, in the time-frequency structure, n sidelink channel resources and n SL PRS resources correspond to different time slots; the n sidelink channel resources correspond to the same time slot; the multiple time slots corresponding to the same SL PRS resource are continuous in the time domain. For example, as Figure 8 shown, the n sidelink channel resources correspond to time slot #0, and the n SL PRS resources correspond to time slots #1 to #4.

[0117] · Sidelink channel resources

[0118] The above n sidelink channel resources respectively correspond to different frequency-domain resources, and the number of frequency-domain resources corresponding to the n sidelink channel resources is the same.

[0119] For example, as Figure 8 shown, there are 4 sidelink channel resources, namely sidelink channel resource #0, sidelink channel resource #1, sidelink channel resource #2, and sidelink channel resource #3. Sidelink channel resource 0 corresponds to the first to F resource blocks (Resource Blocks, RBs), sidelink channel resource 1 corresponds to the (F + 1)th to 2F RBs, sidelink channel resource 2 corresponds to the (2F + 1)th to 3F RBs, and sidelink channel resource 3 corresponds to the (3F + 1)th to 4F RBs; each sidelink channel resource corresponds to F RBs, where F is an integer greater than 1.

[0120] Optionally, the starting point of the frequency-domain resources corresponding to the above-mentioned n sidelink channel resources is configured by the network. Alternatively, the starting point of the frequency-domain resources corresponding to the above-mentioned n sidelink channel resources is pre-configured by the network. Alternatively, the starting point of the frequency-domain resources corresponding to the above-mentioned n sidelink channel resources is determined based on the frequency-domain resources of the sidelink resource pool corresponding to the time slot; for example, the first Physical Resource Block (PRB) of the sidelink resource pool corresponding to the time slot is used as the starting point of the frequency-domain resources corresponding to the sidelink channel resources.

[0121] Optionally, the number of frequency-domain resources corresponding to each of the above-mentioned n sidelink channel resources is configured by the network. Alternatively, the number of frequency-domain resources corresponding to each sidelink channel resource is pre-configured by the network. Alternatively, the number of frequency-domain resources corresponding to each sidelink channel resource is determined based on n and the frequency-domain resources of the sidelink resource pool; for example, if the number of frequency-domain resources corresponding to each sidelink channel resource is denoted as F, the frequency-domain resources of the sidelink resource pool are R PRBs, and there are n sidelink channel resources in the time-frequency structure, then F = R / n, as Figure 8 shown, when n is 4, then F = R / 4.

[0122] Optionally, the first symbol among the multiple symbols corresponding to the above-mentioned n sidelink channel resources is used for Automatic Gain Control (AGC). For example, the first symbol in a time slot corresponding to the n sidelink channel resources is used for AGC.

[0123] · SL PRS resources

[0124] The above-mentioned n SL PRS resources belong to one or more SL PRS sets; the SL PRS resources belonging to the same SL PRS set correspond to the same multiple symbols; in the case where an SL PRS set includes multiple SL PRS resources, different SL PRS resources belonging to the same SL PRS set perform frequency-division multiplexing or code-division multiplexing when transmitting SL PRS; the SL PRS resources belonging to different SL PRS sets correspond to different multiple symbols.

[0125] Exemplarily, the above-mentioned n SL PRS resources belong to one or more time slots, or, the above-mentioned one or more SL PRS sets belong to one or more time slots. For example, as Figure 8 shown, the n SL PRS resources occupy 4 time slots, namely time slot #1, time slot #2, time slot #3, and time slot #4.

[0126] Exemplarily, as Figure 9As shown, a time slot includes 3 SL PRS sets, namely the first SL PRS set, the second SL PRS set, and the third SL PRS set. Assume that each SL PRS set includes 3 SL PRS resources; the first SL PRS set corresponds to 4 symbols from symbol 0 to symbol 3, so the 3 SL PRS resources in the first SL PRS set all correspond to the 4 symbols from symbol 0 to symbol 3; the second SL PRS set corresponds to 5 symbols from symbol 4 to symbol 7, so the 3 SL PRS resources in the second SL PRS set all correspond to the 4 symbols from symbol 4 to symbol 7; the third SL PRS set corresponds to 5 symbols from symbol 8 to symbol 12, so the 3 SL PRS resources in the third SL PRS set all correspond to the 4 symbols from symbol 8 to symbol 12. The 3 SL PRS resources in each SL PRS set perform frequency division multiplexing on R PRBs when transmitting SL PRS.

[0127] Optionally, different SL PRS resources in the same SL PRS set have the same comb structure and different RE offsets.

[0128] For example, assume that each SL PRS set includes 3 SL PRS resources. The 3 SL PRS resources in an SL PRS set all have a comb structure with a comb size of 3. The RE offset of the first SL PRS resource in the SL PRS set is 0, the RE offset of the second SL PRS resource is 1, and the RE offset of the third SL PRS resource is 2.

[0129] Optionally, the first symbol among the multiple symbols corresponding to the same SL PRS resource is used for AGC. As Figure 9 shown, the first symbol (i.e., symbol 0) among the 4 symbols from symbol 0 to symbol 3 corresponding to the first SL PRS set in a time slot is used for AGC; the first symbol (i.e., symbol 4) among the 4 symbols from symbol 4 to symbol 7 corresponding to the second SL PRS set is used for AGC; the first symbol (i.e., symbol 8) among the 5 symbols from symbol 8 to symbol 12 corresponding to the third SL PRS set is used for AGC.

[0130] · Corresponding relationship between sidelink channel resources and SL PRS resources

[0131] The above-mentioned n sidelink channel resources and n SL PRS resources correspond to each other in sequence according to their respective indexes.

[0132] For example, the indexes of 4 sidelink channel resources are 0 - 3 in sequence, and the indexes of 4 SL PRS resources are (0,0), (0,1), (1,0), and (1,1) in sequence. The sidelink channel resource with index 0 (i.e., sidelink channel resource 0) is correspondingly associated with the SL PRS resource with index (0,0), the sidelink channel resource with index 1 (i.e., sidelink channel resource 1) is correspondingly associated with the SL PRS resource with index (0,1), the sidelink channel resource with index 2 (i.e., sidelink channel resource 2) is correspondingly associated with the SL PRS resource with index (1,0), and the sidelink channel resource with index 3 (i.e., sidelink channel resource 3) is correspondingly associated with the SL PRS resource with index (1,1).

[0133] Optionally, the indexes of n sidelink channel resources are determined in ascending order in the frequency domain. As Figure 8 shown, for the 4 sidelink channel resources in ascending order in the frequency domain, the indexes are 0, 1, 2, 3 in sequence.

[0134] Optionally, after the n SL PRS resources are sorted based on the method of first comb offset and then set index, they correspond to the n sidelink channel resources. Or, after the n SL PRS resources are sorted based on the method of first set index and then comb offset, they correspond to the n sidelink channel resources.

[0135] Exemplarily, the indexes (0,0), (0,1), (1,0), and (1,1) of the above 4 SL PRS resources can be understood as (comb offset, set index); (0,0) represents the SL PRS resource 0 with a RE offset of 0 in the first SL PRS set with a set index of 0, (0,1) represents the SL PRS resource 1 with a RE offset of 0 in the second SL PRS set with a set index of 1, (1,0) represents the SL PRS resource 2 with a RE offset of 1 in the first SL PRS set with a set index of 0, and (1,1) represents the SL PRS resource 3 with a RE offset of 1 in the second SL PRS set with a set index of 1.

[0136] Alternatively, the indexes (0,0), (0,1), (1,0), and (1,1) of the above 4 SL PRS resources can be understood as (set index, comb offset); (0,0) represents the SL PRS resource 0 with a RE offset of 0 in the first SL PRS set with a set index of 0, (0,1) represents the SL PRS resource 1 with a RE offset of 1 in the first SL PRS set with a set index of 0, (1,0) represents the SL PRS resource 2 with a RE offset of 0 in the second SL PRS set with a set index of 1, and (1,1) represents the SL PRS resource 3 with a RE offset of 1 in the second SL PRS set with a set index of 1.

[0137] Four SL PRS resources correspond to four sidelink channel resources in sequence: SL PRS resource 0 corresponds to sidelink channel resource 0, SL PRS resource 1 corresponds to sidelink channel resource 1, SL PRS resource 2 corresponds to sidelink channel resource 2, and SL PRS resource 3 corresponds to sidelink channel resource 3.

[0138] Optionally, in each group of associated sidelink channel resources and SL PRS resources, the time domain position of the sidelink channel resource is before the time domain position of the SL PRS resource. For example, as Figure 8 shown, the time domain position of the sidelink channel resource is time slot #0, and the time domain position of the SL PRS resource is time slots #1 to 4. The time domain position of the sidelink channel resource is before the time domain position of the SL PRS resource.

[0139] · Symbols for transceiver conversion

[0140] There are symbols for transceiver conversion in the time-frequency structure.

[0141] Optionally, the symbols corresponding to the n sidelink channel resources and the symbols corresponding to the n SL PRS resources are consecutive; or, there are no symbols for transceiver conversion between the symbols corresponding to the n sidelink channel resources and the symbols corresponding to the n SL PRS resources.

[0142] Exemplarily, the time slots corresponding to the n sidelink channel resources and the time slots corresponding to the n SL PRS resources are consecutive; or, there are no symbols for transceiver conversion between the time slots corresponding to the n sidelink channel resources and the time slots corresponding to the n SL PRS resources; for example, as Figure 9 shown, the next symbol of the sidelink channel resource is the first symbol of time slot #1.

[0143] Optionally, the symbols corresponding to at least two SL PRS sets are consecutive; or, there are no symbols for transceiver conversion between the symbols corresponding to at least two SL PRS sets.

[0144] That is to say, there are no symbols for transceiver conversion between SL PRS sets. For example, as Figure 9 shown, the next symbol of the first SL PRS set is the first symbol of the second SL PRS set, and the first symbol of the second SL PRS set is for AGC; the next symbol of the second SL PRS set is the first symbol of the third SL PRS set, and the first symbol of the third SL PRS set is for AGC.

[0145] In some embodiments, the last symbol of the time-frequency structure is a symbol for transceiver conversion; or, in the mode of autonomously selecting resources, the last symbol of the time-frequency structure is a symbol for transceiver conversion.

[0146] Exemplarily, as Figure 8 shown, the last symbol of the last time slot in the time-frequency structure is a symbol for transceiver conversion. Autonomous resource selection means that the terminal autonomously selects resources in the sidelink resource pool for SL PRS transmission.

[0147] In some embodiments, in the mode of network-scheduled resources and when the first condition is met, the last symbol of the time-frequency structure is a symbol for sending or receiving SL PRS.

[0148] Optionally, the first terminal is a transmitting terminal, and the first condition includes at least one of the following:

[0149] The first terminal is configured to send SL PRS within the last SL PRS set for the second terminal to measure RSTD;

[0150] The SL PRS set in the next time-frequency structure is configured for measuring RSTD.

[0151] Exemplarily, the second terminal above is a receiving terminal. Network scheduling means that the network device schedules time-frequency resources for the terminal, such as the base station schedules sidelink channel resources and SL PRS resources for the terminal.

[0152] The third possible time-frequency structure design:

[0153] The sidelink channel resources and SL PRS resources belonging to the same group in the time-frequency structure correspond to the same symbol set, and a symbol set includes at least three consecutive symbols; the sidelink channel resources and SL PRS resources belonging to the same group occupy different symbols within the same symbol set.

[0154] · SL PRS resources

[0155] The above n SL PRS resources belong to one or more symbol sets; the SL PRS resources belonging to the same symbol set correspond to the same symbol set, and the SL PRS resources belonging to different symbol sets correspond to different symbol sets.

[0156] Exemplarily, as Figure 10 shown, the n SL PRS resources belong to 3 SL PRS sets, namely the first SL PRS set, the second SL PRS set, and the third SL PRS set. One or more SL PRS resources in the first SL PRS set correspond to the symbol set {symbol 2, symbol 3}, one or more SL PRS resources in the second SL PRS set correspond to the symbol set {symbol 7}, and one or more SL PRS resources in the third SL PRS set correspond to the symbol set {symbol 12}.

[0157] Optionally, one or more different SL PRS resources belonging to the same symbol set are frequency-division multiplexed or code-division multiplexed when transmitting SL PRS.

[0158] For example, as Figure 10 shown, the first SL PRS set includes 2 SL PRS resources, and the 2 SL PRS resources perform frequency-division multiplexing on symbols 2 to 3.

[0159] Optionally, different SL PRS resources in the same symbol set have the same comb structure and different RE offsets.

[0160] For example, assume that each SL PRS set includes 3 SL PRS resources. The 3 SL PRS resources in one SL PRS set all have a comb structure with a comb size of 3. The RE offset of the first SL PRS resource in the SL PRS set is 0, the RE offset of the second SL PRS resource is 1, and the RE offset of the third SL PRS resource is 2.

[0161] · Sidelink channel resources

[0162] Exemplarily, the above n sidelink channel resources belong to one or more symbol sets. For example, as Figure 10 shown, the n sidelink channel resources belong to 3 SL PRS sets, namely the first SL PRS set, the second SL PRS set, and the third SL PRS set. One sidelink channel resource in the first SL PRS set corresponds to the symbol set {symbol 1}, one sidelink channel resource in the second SL PRS set corresponds to the symbol set {symbol 6}, and one sidelink channel resource in the third SL PRS set corresponds to the symbol set {symbol 11}.

[0163] Optionally, one or more sidelink channel resources belonging to the same symbol set correspond to the same one or more symbols. One or more sidelink channel resources respectively correspond to different frequency-domain resources, and the number of frequency-domain resources corresponding to one or more sidelink channel resources is the same.

[0164] For example, the first SL PRS set includes 2 sidelink channel resources. The 2 sidelink channel resources respectively correspond to different frequency-domain resources on symbol 1, and the number of frequency-domain resources corresponding to the 2 sidelink channel resources on symbol 1 is both F.

[0165] Optionally, the number of frequency-domain resources corresponding to one or more sidelink channel resources is configured by the network. Or, the number of frequency-domain resources corresponding to one or more sidelink channel resources is pre-configured by the network. Or, the number of frequency-domain resources corresponding to one or more sidelink channel resources is determined based on the number of one or more sidelink channel resources and the number of frequency-domain resources in the sidelink resource pool; Exemplarily, the number of frequency-domain resources corresponding to one or more sidelink channel resources in each symbol set is denoted as F, the frequency-domain resources of the sidelink resource pool are R PRBs, and there are n sidelink channel resources in the time-frequency structure, then F = R / n, as Figure 10 shown, when n is 4, then F = R / 4.

[0166] Optionally, the starting point of the frequency-domain resources corresponding to one or more sidelink channel resources is configured by the network. Or, the starting point of the frequency-domain resources corresponding to one or more sidelink channel resources is pre-configured by the network. Or, the starting point of the frequency-domain resources corresponding to one or more sidelink channel resources is determined based on the frequency-domain resources of the sidelink resource pool corresponding to the time slot; for example, the first Physical Resource Block (PRB) of the sidelink resource pool corresponding to the time slot is used as the starting point of the frequency-domain resources corresponding to the sidelink channel resources.

[0167] · Corresponding relationship between sidelink channel resources and SL PRS resources

[0168] In the same symbol set, one or more groups of associated sidelink channel resources and SL PRS resources are included. Exemplarily, the frequency-domain resources corresponding to the sidelink channel resources in the same symbol set are the same as the frequency-domain resources corresponding to the SL PRS resources.

[0169] Optionally, one or more sidelink channel resources and one or more SL PRS resources in the same symbol set correspond to each other in sequence according to their respective indexes.

[0170] Optionally, the indexes of multiple sidelink channel resources in the same symbol set are determined in ascending order of frequency domain.

[0171] Optionally, after multiple SL PRS resources in the same symbol set are sorted based on the method of first comb offset and then set index, they correspond to multiple sidelink channel resources. Or, after multiple SL PRS resources in the same symbol set are sorted based on the method of first set index and then comb offset, they correspond to multiple sidelink channel resources.

[0172] Optionally, among the associated sidelink channel resources and SL PRS resources in the symbol set, the time-domain position of the sidelink channel resources is before the time-domain position of the SL PRS resources. As Figure 10 shown, the time-domain positions of the sidelink channel resources in 3 symbol sets are all before the time-domain positions of the SL PRS resources.

[0173] Alternatively, among the sidelink channel resources and SL PRS resources associated in the symbol set, the time domain position of the sidelink channel resources is after the time domain position of the SL PRS resources. As Figure 12 shown, the time domain position of the sidelink channel resources in the second symbol set is after the time domain position of the SL PRS resources.

[0174] · Symbols for transceiver switching

[0175] Optionally, the symbols corresponding to one or more sidelink channel resources in the same symbol set and the symbols corresponding to one or more SL PRS resources are consecutive. Or, there are no symbols for transceiver switching between the symbols corresponding to one or more sidelink channel resources and the symbols corresponding to one or more SL PRS resources in the same symbol set. Exemplarily, as Figure 10 shown, the first symbol after the symbols corresponding to the sidelink channel resources in 3 symbol sets is the symbol corresponding to the SL PRS resource.

[0176] In some embodiments, the next symbol of the symbol set is a symbol for transceiver switching. Exemplarily, as Figure 10 shown, the next symbol of the first symbol set is a symbol for transceiver switching, and the next symbol of the second symbol set is a symbol for transceiver switching.

[0177] Or, the next symbol of the symbol set is the first symbol of the next symbol set. Exemplarily, as Figure 11 shown, the next symbol of the first symbol set is the first symbol of the second symbol set (symbol 4), and the next symbol of the second symbol set is the first symbol of the third symbol set (symbol 8).

[0178] Or, in the mode of autonomously selecting resources, the next symbol of the symbol set is a symbol for transceiver switching. Exemplarily, as Figure 10 shown, the next symbol (symbol 4) of the first symbol set is a symbol for transceiver switching.

[0179] In some embodiments, in the mode of network scheduling resources and when the first condition is met, the next symbol of the symbol set is the first symbol of the next symbol set.

[0180] Optionally, the first terminal is a transmitting terminal, and the first condition includes at least one of the following:

[0181] The first terminal is configured to transmit SL PRS within the symbol set for the second terminal to measure RSTD;

[0182] The next symbol set is configured to measure RSTD.

[0183] Exemplarily, the second terminal is the receiving terminal.

[0184] In some embodiments, the first symbol in the symbol set is used for AGC. Exemplarily, as Figure 10 shown, the first symbol in the 3 symbol sets (including symbol 0, symbol 5, and symbol 10) is used for AGC.

[0185] Optionally, the next symbol of the symbol set is configured by the network; or, the next symbol of the symbol set is pre-configured by the network; or, the next symbol of the symbol set is agreed upon by the communication protocol. For example, as Figure 10 shown, the next symbol of the first symbol set is the transceiver switching symbol, which is configured by the network, or pre-configured by the network, or agreed upon by the communication protocol. Another example, as Figure 11 shown, the next symbol of the first symbol set is the first symbol of the second symbol set, which is configured by the network, or pre-configured by the network, or agreed upon by the communication protocol.

[0186] In some embodiments, if the symbol set is the even-numbered symbol set in the time-frequency structure, the second symbol of the symbol set corresponds to the sidelink channel resource, and the next symbol of the symbol set is the first symbol of the next symbol set. Exemplarily, when the symbol set is the even-numbered symbol set in the time-frequency structure, the symbol corresponding to the sidelink channel resource in the symbol set is before the symbol corresponding to the SL PRS resource; as Figure 13 shown, if the first symbol set is the even-numbered symbol set, then the symbol 1 corresponding to the sidelink channel resource is the second symbol in the first symbol set, and the next symbol of the symbol set is symbol 4, and symbol 4 is the first symbol of the second symbol set.

[0187] If the symbol set is the odd-numbered symbol set in the time-frequency structure, the last symbol of the symbol set corresponds to the sidelink channel resource, and the next symbol of the symbol set is the symbol for transceiver switching. Exemplarily, when the symbol set is the odd-numbered symbol set in the time-frequency structure, the symbol corresponding to the sidelink channel resource in the symbol set is after the symbol corresponding to the SL PRS resource; as Figure 13 shown, if the second symbol set is the odd-numbered symbol set, then the symbol 7 corresponding to the sidelink channel resource is the last symbol in the second symbol set, and the next symbol of the symbol set is symbol 8, and symbol 8 is the symbol for transceiver switching.

[0188] Among them, the symbol sets in the time-frequency structure are indexed from 0 in the order of time domain.

[0189] In some embodiments, when the symbol set is the odd - numbered symbol set in the time - frequency structure, the second symbol of the symbol set corresponds to the sidelink channel resource, and the next symbol of the symbol set is the first symbol of the next symbol set. When the symbol set is the even - numbered symbol set in the time - frequency structure, the last symbol of the symbol set corresponds to the sidelink channel resource, and the next symbol of the symbol set is the symbol for transceiver conversion.

[0190] In summary, three time - frequency structures are provided in the embodiments of the present application. On each time - frequency structure, the time - domain position and frequency - domain position of the sidelink channel, the time - domain position and frequency - domain position of the sidelink positioning reference signal, the correspondence relationship between the resources of the sidelink channel and the sidelink positioning reference signal, and whether transceiver conversion needs to be reserved between channels and signals, signals and signals are defined. At least one of the above - mentioned time - frequency structures can be adopted to measure the positioning reference signal during sidelink communication between terminals.

[0191] In the case where the associated sidelink channel resources and SL PRS resources belong to different sidelink resource pools, the terminal sends and receives SL PRS through the resources in the first sidelink resource pool and the second sidelink resource pool. The above - mentioned n groups of sidelink channel resources and SL PRS resources are associated resources. For example, the first sidelink channel resource in the first sidelink resource pool and the first SL PRS resource in the second sidelink resource pool are a group of associated resources in the time - frequency structure.

[0192] In the embodiments of the present application, the structure of the sidelink channel resources in the first sidelink resource pool and the SLPRS resources in the second sidelink resource pool can be described as follows, which can be regarded as the fourth structure for SL PRS transmission.

[0193] It should be noted that the time - frequency structure corresponds to one or more first time - domain units in the time domain. The first time - domain unit includes m second time - domain units, and m is an integer greater than 1. In different embodiments of the present application, the first time - domain unit can be at least one of a symbol group, a time slot, a time - slot group, a sub - frame, and a sub - frame group; the second time - domain unit can be a symbol, such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol. The following description of the three types of time - frequency structures takes the first time - domain unit as a time slot and the second time - domain unit as a symbol as an example.

[0194] The fourth possible time - frequency structure design:

[0195] The sidelink channel resources and SL PRS resources belong to different sidelink resource pools.

[0196] Exemplarily, n sidelink channel resources belong to the first sidelink resource pool, and n SL PRS resources belong to the second sidelink resource pool. AsFigure 14 As shown, there are n sidelink channel resources in the PSCCH / PSSCH resource pool. Information can be carried through the n sidelink channel resources to associate the SL PRS resources in the SL PRS resource pool.

[0197] · SL PRS resources

[0198] The above n SL PRS resources belong to one or more SL PRS sets; there are symbols for transceiver conversion between adjacent two SL PRS sets, and / or, there are no symbols for transceiver conversion between adjacent two SL PRS sets. For example, there are symbols for transceiver conversion between the first SL PRS set and the second SL PRS set, and there are no symbols for transceiver conversion between the second SL PRS set and the second SL PRS set.

[0199] Optionally, one or more SL PRS sets are included in the same time slot, and the symbols corresponding to different SL PRS sets are different. For example, 3 SL PRS sets are included in the same time slot, the first SL PRS set corresponds to symbols 0 - 3, the second SL PRS set corresponds to symbols 5 - 8, and the third SL PRS set corresponds to symbols 10 - 13.

[0200] · Sidelink channel resources

[0201] The first sidelink resource pool includes the PSCCH / PSSCH resource pool. Exemplarily, the sidelink channel resources can be located on the PSCCH, or the sidelink channel resources can be located on the PSSCH.

[0202] · Corresponding relationship between SL PRS resources and sidelink channel resources

[0203] Exemplarily, the information carried on the sidelink channel resources is used to indicate the time-frequency position of the SL PRS resources and the transmission method of the SL PRS, so as to transmit the SL PRS on the SL PRS resources.

[0204] · Symbols for transceiver conversion

[0205] Optionally, multiple SL PRS sets are included in the same time slot; the last symbol in the same time slot is the symbol for transceiver conversion. For example, 3 SL PRS sets are included in the same time slot, the first SL PRS set corresponds to symbols 0 - 3, the second SL PRS set corresponds to symbols 4 - 7, the third SL PRS set corresponds to symbols 8 - 12, and the symbol 13 in this time slot is the symbol for transceiver conversion.

[0206] Optionally, multiple SL PRS sets are included within the same time slot. The next symbol of the previous SL PRS set between two adjacent SL PRS sets is the first symbol of the next SL PRS set. For example, the next symbol of the first SL PRS set is symbol 5, and symbol 5 is the first symbol of the second SL PRS set.

[0207] Or, two adjacent SL PRS sets are both configured to measure RSTD, and the next symbol of the previous SL PRS set between two adjacent SL PRS sets is the first symbol of the next SL PRS set. For example, the second SL PRS set is adjacent to the third SL PRS set, and there is also a first SL PRS set before the second SL PRS set and the third SL PRS set. The next symbol of the first SL PRS set is the first symbol of the second SL PRS set, that is, there is no symbol for transceiver conversion between the first SL PRS set and the second SL PRS set.

[0208] Or, any one of two adjacent SL PRS sets is not configured to measure RSTD, and the next symbol of the previous SL PRS set between two adjacent SL PRS sets is a symbol for transceiver conversion. For example, the second SL PRS set is adjacent to the third SL PRS set, and there is also a first SL PRS set before the second SL PRS set and the third SL PRS set. The next symbol of the first SL PRS set is a symbol for transceiver conversion, and the symbol after the symbol for transceiver conversion is the first symbol of the second SL PRS set, that is, there is a symbol for transceiver conversion between the first SL PRS set and the second SL PRS set.

[0209] In summary, the above structure provided in the embodiments of the present application defines the time domain position and frequency domain position of the sidelink channel, the time domain position and frequency domain position of the sidelink positioning reference signal, the corresponding relationship between the resources of the sidelink channel and the sidelink positioning reference signal, and whether transceiver conversion needs to be reserved between the channel and the signal, and between the signal and the signal. The above structure can be used to implement the measurement of the positioning reference signal during sidelink communication between terminals.

[0210] Reference Figure 7 For example, the first time-frequency structure is described. In the first time-frequency structure, the sidelink channel and one or more SL PRS occupy different OFDM symbols within the same time slot. Different sidelink channel resources occupy different RBs of the same OFDM symbol within the time slot. The OFDM symbol occupied by the sidelink channel and the OFDM symbol occupied by the SL PRS are adjacent, and multiple SL PRS symbols are adjacent to each other.

[0211] · In a time slot, an OFDM symbol is divided into two parts. Among them, the first C consecutive OFDM symbols at the start of the time slot are used for the sidelink channel, where the value of C can be defined by the protocol, or configured by the network, or pre-configured. For example, the value of C is defined by the protocol as a certain value between 2 and 4, or configured or pre-configured by the network as one of the values between 3 and 4. Among them, the first OFDM symbol among the C consecutive OFDM symbols is used for the AGC adjustment of the UE receiving the sidelink channel.

[0212] · The starting point A of the RB available for sidelink channel transmission within the sidelink channel symbol (i.e., the OFDM symbol occupied by the sidelink channel) can be:

[0213] 1) By default, it is the first PRB of the SL PRS resource pool where the time slot is located; or,

[0214] 2) Configured or pre-configured by the network.

[0215] · Every F RBs starting from the starting point A within the sidelink channel symbol form a sidelink channel resource, and the channel index increases sequentially. The value of F can be:

[0216] 1) Configured or pre-configured by the network;

[0217] 2) Determined according to the number of SL PRS symbol sets (i.e., SL PRS sets) within the time slot, and the number of SL PRSs allowed for frequency division and / or code division multiplexing within each SL PRS symbol set. Among them, an SL PRS symbol set corresponds to one or more OFDM symbols used for one SL PRS transmission. The OFDM symbols within an SL PRS symbol set can be consecutive or non-consecutive. The SL PRS symbol sets within a time slot are configured or pre-configured by the network.

[0218] Exemplarily, the number of SL PRS symbol sets (i.e., SL PRS sets) within the time slot, and the number of SL PRSs allowed for frequency division and / or code division multiplexing within each SL PRS symbol set can be determined to obtain n.

[0219] For example: In Figure 7 , there are two SL PRS symbol sets within each time slot. Only 2 SL PRSs are allowed to be transmitted within each set. The two SL PRSs have the same comb size, but occupy different RE offsets, as Figure 7 shown. Then, a total of 4 SL PRSs can be transmitted within a time slot. At this time, the value of F is R / 4, where R is the number of RBs within the resource pool.

[0220] · There is a one-to-one correspondence between the sidelink channel resources within a sidelink channel symbol and the SL PRS resources within a time slot. The sidelink channel indication sent on the sidelink channel resources of a certain index is for the SL PRS transmission on the SL PRS resources of the same index. The index of the SL PRS resources is determined in one of the following ways:

[0221] Determined in the order of RE offset first and then SL PRS symbol index. As Figure 7 shown, there are two sets of SL PRS symbols, the allowed comb size is 4, the allowed RE offsets are #0 and #2. The indexes of the SL PRS resources with RE offsets #0 / #2 within the first set of SL PRS symbols are #0 / #1, and the indexes of the SL PRS resources with RE offsets #0 / #2 within the second set of SL PRS symbols are #2 / #3.

[0222] Determined in the order of SL PRS symbol index first and then RE offset. As Figure 7 shown, there are two sets of SL PRS symbols, the allowed comb size is 4, the allowed RE offsets are #0 and #2. The indexes of the SL PRS resources with RE offset #0 within the first / second set of SL PRS symbols are #0 / #1, and the indexes of the SL PRS resources with RE offset #2 within the first / second set of SL PRS symbols are #2 / #3.

[0223] · Since the sidelink channels used to indicate SL PRS transmissions within this time slot are all sent at the same time, due to the half-duplex limitation, any UE sending a sidelink channel cannot receive other sidelink channels and the indicated SL PRS sent within this time slot. Therefore, there is no need to perform a transmit-receive conversion operation. So, the next symbol of the sidelink channel symbol is the first OFDM symbol of the SL PRS symbol set, that is, there is no time interval for transmit-receive conversion in between.

[0224] The UE should adjust the transmission power of the sidelink channel and the transmission power of the SL PRS to avoid the radio frequency conversion time from sending the sidelink channel to sending the SL PRS, and not configure a transmit-receive conversion symbol between the symbol corresponding to the sidelink channel and the symbol corresponding to the SL PRS;

[0225] Do not configure a transmit-receive conversion symbol between the symbol corresponding to the sidelink channel and the symbol corresponding to the SL PRS, to avoid resource waste caused by introducing an additional transmit-receive conversion interval.

[0226] · Since all the sidelink channels used to indicate the SL PRS transmission within this time slot are transmitted within the same time, due to the half-duplex limitation, any UE transmitting a sidelink channel cannot receive other sidelink channels and the indicated SL PRS transmitted within this time slot. Therefore, there is no need to perform the transceiver conversion operation. Thus, two adjacent SL PRS symbol sets within this time slot occupy consecutive OFDM symbols, that is, there is no time interval for transceiver conversion between two adjacent SL PRS symbol sets.

[0227] · The last OFDM symbol within the time slot can:

[0228] 1) The first way: always used for transceiver conversion;

[0229] 2) The second way:

[0230] - If the current resource pool selects the SL PRS resources for transmitting SL PRS in the way that the UE autonomously selects resources, since any UE needs to perform channel sensing to select the transmission resources, this symbol is used for transceiver conversion.

[0231] - If this resource pool selects the SL PRS resources in the way of network scheduling resources, then:

[0232] For the transmitting UE, when at least one of the following conditions is met, then this UE transmits SLPRS in the last OFDM symbol:

[0233] 1> If this UE is configured to transmit SL PRS within the last SL PRS symbol set for other UEs to measure RSTD;

[0234] 2> The SL PRS symbol set in the next time slot is also configured for UEs to measure RSTD.

[0235] For the receiving UE, when at least one of the following conditions is met, it is considered that there is SL PRS transmission in the last OFDM symbol, and this UE decides whether to receive SL PRS on this symbol based on its own implementation:

[0236] 1> If the receiving UE is configured to use the last SL PRS symbol set for measuring RSTD;

[0237] 2> If this UE is configured to transmit SL PRS within the last SL PRS symbol set for other UEs to measure RSTD;

[0238] 3> The SL PRS symbol set in the next time slot is also configured for UEs to measure RSTD.

[0239] Reference Figure 8 and Figure 9, an example of the second time-frequency structure is given. In the second time-frequency structure, the sidelink channel indicating SLPRS transmission is sent within specific time slots of the resource pool, and the indicated SL PRS is located within one or more time slots belonging to the resource pool, which is called the SL PRS time slot (the time slot corresponding to the SLPRS resource) associated with the sidelink channel time slot (the time slot corresponding to the sidelink channel resource). Different sidelink channels occupy different PRBs within the time slot. The last OFDM symbol of the time slot where the sidelink channel is located and the last OFDM symbol of the last SL PRS time slot associated with it are used for transceiver conversion, and there are no symbols for transceiver conversion in other OFDM symbols within the SL PRS time slot associated with the sidelink channel.

[0240] As Figure 8 shown, in this embodiment, since the sidelink channels sent within the sidelink channel time slot occupy the same time resources, due to the half-duplex limitation, any UE sending a sidelink channel cannot receive the SL PRS within the SL PRS time slot associated with this time slot, so there is no need to perform transceiver conversion operations. Therefore, except for the last OFDM symbol of the last SL PRS time slot associated with it, there is no need to reserve OFDM symbols for transceiver conversion.

[0241] It should be noted that there can be multiple SL PRS symbol sets within the SL PRS time slot associated with the sidelink channel time slot. As Figure 9 shown (corresponding to Figure 8 time slot 4), and there is no transceiver conversion interval between different symbol sets.

[0242] In the time-frequency structure of this embodiment, no OFDM symbols for transceiver conversion are reserved between the symbols corresponding to the sidelink channel resources and the symbols corresponding to the SL PRS resources, and between the symbols corresponding to the SL PRS resources and the symbols corresponding to the SL PRS resources, to avoid resource waste caused by introducing additional transceiver conversion intervals.

[0243] Referring to Figures 10 to 13 , an example of the third time-frequency structure is given. In the third time-frequency structure, the sidelink channel and one or more SL PRSs occupy different OFDM symbols within the same time slot. Different sidelink channels occupy different OFDM symbols or different RBs within the time slot. The OFDM symbols occupied by the sidelink channel and the OFDM symbols occupied by the SL PRS are adjacent, and multiple SLPRS symbols are adjacent to each other.

[0244] In this embodiment, the OFDM symbols within the time slot are divided into multiple symbol sets, and each symbol set is used to send one SL PRS and the sidelink channel indicating the SL PRS:

[0245] · The first symbol of each symbol set is used for AGC adjustment.

[0246] · There is one or more OFDM symbols in each symbol set for sidelink channel transmission. Exemplarily, hereinafter, taking one OFDM symbol for sidelink channel transmission as an example, the number of RBs occupied by the sidelink channel can be:

[0247] 1) Configured or pre-configured by the network;

[0248] 2) Determined according to the number of SL PRSs allowing frequency division and / or code division multiplexing within this symbol set.

[0249] For example: Only 2 SL PRSs are allowed to be transmitted within the symbol set. The two SL PRSs adopt the same comb size (CombSize), but occupy different RE offsets. For example, the number of RBs occupied by the sidelink channel is half of the number of RBs occupied by the SL PRS.

[0250] There is a one-to-one correspondence between the sidelink channel resources within the sidelink channel symbol (the symbol occupied by the sidelink channel) and the SL PRS resources within the time slot. The sidelink channel indication sent on the sidelink channel resources of a certain index is the SL PRS sent on the SL PRS resources of the same index. The index of the sidelink channel is determined from high to low according to the frequency domain position, and the index of the SL PRS resources is determined according to the RE offset.

[0251] For the next OFDM symbol of a symbol set, it can be:

[0252] · In some alternative embodiments, if the current resource pool selects the SL PRS resources for SL PRS transmission in the way that the UE autonomously selects resources, since any UE needs to perform channel listening to select the transmission resources, the next OFDM symbol is the symbol for transceiver conversion; if this resource pool selects the SL PRS resources in the way of network scheduling resources, then:

[0253] 1) For the transmitting UE, if this UE is configured to transmit SL PRS within this symbol set for other UEs to measure RSTD, the next symbol set is also used for other UEs to measure RSTD. Since this UE only transmits SL PRS, the next OFDM symbol is the first OFDM symbol of the next symbol set; otherwise, it is the transceiver conversion symbol (i.e., the symbol for transceiver conversion);

[0254] 2) For the receiving UE, if this UE is configured to measure RSTD based on the SL PRS transmitted within this symbol set, the next OFDM symbol is the first OFDM symbol of the next symbol set; otherwise, it is the transceiver conversion symbol. This UE decides whether to receive the SL PRS on the last OFDM symbol of this symbol set based on its own implementation.

[0255] In this embodiment, when the symbol set is used for RSTD measurement, resource waste caused by introducing an additional transceiver conversion interval can be avoided.

[0256] · In some alternative embodiments, the next OFDM symbol is the first OFDM symbol of the next symbol set, as Figure 11 shown, that is, the UE that transmits / receives the SL PRS using this time slot only performs transmission / reception operations within this time slot.

[0257] In this embodiment, resource waste caused by transceiver conversion symbols can be minimized.

[0258] · In some alternative embodiments, according to the resource pool configuration, or pre-configuration, or communication protocol convention, for different symbol sets, the next OFDM symbol is the first OFDM symbol of the next symbol set, or a symbol for transceiver conversion, as Figure 12 shown.

[0259] In this embodiment, resource waste caused by transceiver conversion symbols can be reduced, and at the same time, reception failures caused by half-duplex limitations can be reduced.

[0260] · In some alternative embodiments, as Figure 13 shown, the symbol sets within a time slot are indexed starting from 0 in chronological order. If the symbol set is the even-numbered symbol set within the time slot, the second OFDM symbol of this symbol set is used to transmit the sidelink channel indicating the SL PRS transmission within this symbol set, and the next OFDM symbol of this symbol set is the first OFDM symbol of the next symbol set; if the symbol set is the odd-numbered symbol set within the time slot, the last OFDM symbol of this symbol set is used to transmit the sidelink channel indicating the SL PRS transmission within this symbol set, and the next OFDM symbol of this symbol set is a transceiver conversion symbol.

[0261] In this embodiment, the transmission or reception of the sidelink channel can be prevented from being affected due to transceiver conversion.

[0262] Refer to Figure 14 , for an example of the fourth structure. In the fourth structure, the SL PRS and the sidelink channel indicating the transmission of this SL PRS are transmitted in different resource pools. The time slot where the SL PRS is located contains one or more SL PRS symbol sets, and there may or may not be a transceiver conversion interval (including symbols for transceiver conversion) between different SL PRS symbol sets.

[0263] As Figure 14As shown, the sidelink channel indicating the transmission of SL PRS is transmitted within the sidelink communication resource pool (the first sidelink resource pool). For any time slot within the SL PRS resource pool (the second sidelink resource pool), it may include one or more sets of SL PRS symbols, such as Figure 14 as shown.

[0264] · In some alternative embodiments, within the SL PRS time slot, the last OFDM symbol is used for the transceiver conversion. In addition, the next OFDM symbol of a set of SL PRS symbols is the first OFDM symbol of the next set of SL PRS symbols, that is, there is no transceiver conversion interval between adjacent sets of SL PRS symbols, which can avoid resource waste caused by introducing an additional transceiver conversion interval.

[0265] · In some alternative embodiments, within the SL PRS time slot, the last OFDM symbol is used for the transceiver conversion. In addition, if adjacent sets of SL PRS symbols within the time slot are both configured for the terminal to measure RSTD, the next OFDM symbol of the previous set of SL PRS symbols is the first OFDM symbol of the next set of SL PRS symbols, that is, there is no transceiver conversion interval between adjacent sets of SL PRS symbols. Otherwise, the next OFDM symbol of a set of SL PRS symbols is a symbol used for transceiver conversion.

[0266] In this embodiment, when a set of SL PRS symbols is used for RSTD measurement, the UE transmitting the SL PRS does not need to receive the SL PRS, so there is no need to introduce resource waste caused by an additional transceiver conversion interval. In other cases, the transceiver conversion interval allows the UE to receive the SL PRS transmitted by other UEs within the time slot.

[0267] In summary, this application provides a multiplexing method for SL PRS and other sidelink channels / signals. According to the method proposed in this application, if the sidelink channels indicating the transmission of multiple SL PRS occupy the same time resources, and the multiple SL PRS occupy different OFDM symbols, these OFDM symbols can be adjacent, and when multiple sets of SL PRS symbols are used for RSTD measurement, the multiple sets of SL PRS symbols can also occupy consecutive OFDM symbols. The method proposed in this application can avoid resource waste caused by introducing an additional transceiver conversion interval, and can also meet the requirements of the UE for receiving and transmitting SL PRS, which is beneficial to improving the resource utilization rate of the SL positioning system and the UE positioning accuracy.

[0268] Figure 15 is a block diagram of a transmission device for SL PRS provided by an exemplary embodiment of this application. This device can be implemented as part or all of a first terminal. This device includes:

[0269] A transmitting module 1501, configured to transmit a first piece of information on a first sidelink channel resource and transmit a first SL PRS on a first SL PRS resource;

[0270] Wherein, the first piece of information is used to indicate the transmission manner of the SL PRS within the first SL PRS resource.

[0271] In some alternative embodiments, the first sidelink channel resource and the first SL PRS resource are a set of associated resources in a time-frequency structure;

[0272] Wherein, the time-frequency structure includes n sets of associated sidelink channel resources and SL PRS resources, and n is an integer greater than 1.

[0273] In some alternative embodiments, the time-frequency structure corresponds to one or more first time-domain units in the time domain, and the first time-domain unit includes m second time-domain units, where m is an integer greater than 1;

[0274] The n sidelink channel resources and the n SL PRS resources in the time-frequency structure correspond to different second time-domain units;

[0275] The n sidelink channel resources correspond to the same multiple second time-domain units; the multiple second time-domain units corresponding to the same SL PRS resource are continuous in the time domain.

[0276] In some alternative embodiments, the n sidelink channel resources respectively correspond to different frequency-domain resources, and the number of frequency-domain resources respectively corresponding to the n sidelink channel resources is the same.

[0277] In some alternative embodiments, the starting point of the frequency-domain resources corresponding to the n sidelink channel resources is configured by the network, or pre-configured by the network, or determined based on the frequency-domain resources of the sidelink resource pool corresponding to the time slot.

[0278] In some alternative embodiments, the number of frequency-domain resources corresponding to each sidelink channel resource is configured by the network, or pre-configured by the network, or determined based on n and the frequency-domain resources of the sidelink resource pool.

[0279] In some alternative embodiments, the first second time-domain unit among the multiple second time-domain units corresponding to the n sidelink channel resources is used for automatic gain control (AGC); the first second time-domain unit among the multiple second time-domain units corresponding to the same SL PRS resource is used for AGC.

[0280] In some alternative embodiments, the n SL PRS resources belong to one or more SL PRS sets;

[0281] SL PRS resources belonging to the same SL PRS set correspond to the same multiple second time domain units; different SL PRS resources belonging to the same SL PRS set are frequency-division multiplexed or code-division multiplexed when transmitting SL PRS.

[0282] SL PRS resources belonging to different SL PRS sets correspond to different multiple second time domain units.

[0283] In some alternative embodiments, different SL PRS resources in the same SL PRS set have the same comb structure and different RE offsets.

[0284] In some alternative embodiments, n sidelink channel resources and n SL PRS resources correspond to each other in sequence according to their respective indices.

[0285] In some alternative embodiments, the indices of n sidelink channel resources are determined in ascending order of frequency domain.

[0286] In some alternative embodiments, after n SL PRS resources are sorted in the order of first comb offset and then set index, they correspond to n sidelink channel resources;

[0287] Or, after n SL PRS resources are sorted in the order of first set index and then comb offset, they correspond to n sidelink channel resources.

[0288] In some alternative embodiments, the multiple second time domain units corresponding to n sidelink channel resources are at least two consecutive second time domain units within the same first time domain unit;

[0289] Or, the multiple second time domain units corresponding to n sidelink channel resources are all the second time domain units within the same first time domain unit.

[0290] In some alternative embodiments, the second time domain units corresponding to n sidelink channel resources and the second time domain units corresponding to n SL PRS resources are consecutive;

[0291] Or, the second time domain units corresponding to n sidelink channel resources and the second time domain units corresponding to n SL PRS resources do not include the second time domain units for transceiver conversion.

[0292] In some alternative embodiments, the second time domain units corresponding to at least two SL PRS sets are consecutive;

[0293] Or, the second time domain units corresponding to at least two SL PRS sets do not include the second time domain units for transceiver conversion.

[0294] In some alternative embodiments, the last second time-domain unit of the time-frequency structure is a second time-domain unit for transceiver conversion;

[0295] Or, in the mode of autonomously selecting resources, the last second time-domain unit of the time-frequency structure is a second time-domain unit for transceiver conversion.

[0296] In some alternative embodiments, in the mode of network scheduling resources and when a first condition is satisfied, the last second time-domain unit of the time-frequency structure is a second time-domain unit for transmitting or receiving SL PRS.

[0297] In some alternative embodiments, the first terminal is a transmitting terminal, and the first condition includes at least one of the following:

[0298] The first terminal is configured to transmit SL PRS within the last SL PRS set for the second terminal to measure RSTD;

[0299] The SL PRS set in the next time-frequency structure is configured for measuring RSTD.

[0300] In some alternative embodiments, the time-frequency structure corresponds to one or more first time-domain units in the time domain, and the first time-domain unit includes m second time-domain units, where m is an integer greater than 1;

[0301] The sidelink channel resources and SL PRS resources belonging to the same group in the time-frequency structure correspond to the same set of second time-domain units, and the set of second time-domain units includes at least three consecutive second time-domain units;

[0302] The sidelink channel resources and SL PRS resources belonging to the same group occupy different second time-domain units within the set of second time-domain units.

[0303] In some alternative embodiments, the first second time-domain unit within the set of second time-domain units is used for AGC.

[0304] In some alternative embodiments, n SL PRS resources belong to at least two sets of second time-domain units;

[0305] The SL PRS resources belonging to the same set of second time-domain units correspond to the same set of second time-domain units, and the SL PRS resources belonging to different sets of second time-domain units correspond to different sets of second time-domain units.

[0306] In some alternative embodiments, one or more groups of associated sidelink channel resources and SL PRS resources are included in the same set of second time-domain units;

[0307] One or more different SL PRS resources belonging to the same set of second time domain units are frequency-division multiplexed or code-division multiplexed when transmitting SL PRS.

[0308] One or more sidelink channel resources belonging to the same set of second time domain units correspond to the same one or more second time domain units. At least two sidelink channel resources respectively correspond to different frequency domain resources, and the number of frequency domain resources corresponding to at least two sidelink channel resources is the same.

[0309] In some optional embodiments, the number of frequency domain resources corresponding to one or more sidelink channel resources is configured by the network, or pre-configured by the network, or determined based on the number of one or more sidelink channel resources and the number of frequency domain resources in the sidelink resource pool.

[0310] In some optional embodiments, different SL PRS resources in the same set of second time domain units have the same comb structure and different RE offsets.

[0311] In some optional embodiments, one or more sidelink channel resources and one or more SL PRS resources in the same set of second time domain units correspond in sequence according to their respective indexes.

[0312] In some optional embodiments, the second time domain units corresponding to one or more sidelink channel resources in the same set of second time domain units and the second time domain units corresponding to one or more SL PRS resources are consecutive;

[0313] Or, the second time domain units corresponding to one or more sidelink channel resources in the same set of second time domain units and the second time domain units corresponding to one or more SL PRS resources do not include the second time domain units for transceiver conversion.

[0314] In some optional embodiments, the next second time domain unit of the set of second time domain units is the second time domain unit for transceiver conversion;

[0315] Or, the next second time domain unit of the set of second time domain units is the first second time domain unit of the next set of second time domain units;

[0316] Or, in the mode of autonomously selecting resources, the next second time domain unit of the set of second time domain units is the second time domain unit for transceiver conversion.

[0317] In some optional embodiments, in the mode of network scheduling resources and when the first condition is met, the next second time domain unit of the set of second time domain units is the first second time domain unit of the next set of second time domain units.

[0318] In some alternative embodiments, the first terminal is a transmitting terminal, and the first condition includes at least one of the following:

[0319] The first terminal is configured to transmit SL PRS within a second time-domain unit set for the second terminal to measure RSTD;

[0320] The next second time-domain unit set is configured for measuring RSTD.

[0321] In some alternative embodiments, the next second time-domain unit of the second time-domain unit set is configured by the network, or pre-configured by the network, or agreed upon by the communication protocol.

[0322] In some alternative embodiments, if the second time-domain unit set is the even-numbered second time-domain unit set in the time-frequency structure, the second second time-domain unit of the second time-domain unit set corresponds to the sidelink channel resource, and the next second time-domain unit of the second time-domain unit set is the first second time-domain unit of the next second time-domain unit set;

[0323] If the second time-domain unit set is the odd-numbered second time-domain unit set in the time-frequency structure, the last second time-domain unit of the second time-domain unit set corresponds to the sidelink channel resource, and the next second time-domain unit of the second time-domain unit set is the second time-domain unit for transceiver conversion;

[0324] Wherein, the second time-domain unit sets in the time-frequency structure are indexed starting from 0 in the time-domain order.

[0325] In some alternative embodiments, n groups of associated sidelink channel resources and SL PRS resources belong to the same sidelink resource pool.

[0326] In some alternative embodiments, n sidelink channel resources belong to the first sidelink resource pool, and n SL PRS resources belong to the second sidelink resource pool.

[0327] In some alternative embodiments, n SL PRS resources belong to one or more SL PRS sets;

[0328] There is a second time-domain unit for transceiver conversion between two adjacent SL PRS sets, and / or there is no second time-domain unit for transceiver conversion between two adjacent SL PRS sets.

[0329] In some alternative embodiments, one or more SL PRS sets are included within the same first time-domain unit, and the second time-domain units corresponding to different SL PRS sets are different.

[0330] In some alternative embodiments, multiple SL PRS sets are included within the same first time-domain unit;

[0331] The last second time domain unit within the same first time domain unit is the second time domain unit for transceiver conversion.

[0332] In some alternative embodiments, multiple SL PRS sets are included within the same first time domain unit;

[0333] The next second time domain unit of the previous SL PRS set between two adjacent SL PRS sets is the first second time domain unit of the next SL PRS set;

[0334] Or, both of two adjacent SL PRS sets are configured to measure RSTD, and the next second time domain unit of the previous SL PRS set between two adjacent SL PRS sets is the first second time domain unit of the next SL PRS set;

[0335] Or, any one of two adjacent SL PRS sets is not configured to measure RSTD, and the next second time domain unit of the previous SL PRS set between two adjacent SL PRS sets is the second time domain unit for transceiver conversion.

[0336] Figure 16 It is a block diagram of a receiving device for SL PRS provided by an exemplary embodiment of the present application. This device can be implemented as part or all of a second terminal. The device includes:

[0337] A receiving module 1601, configured to receive first information on a first sidelink channel resource and receive a first SL PRS on a first SL PRS resource;

[0338] Wherein, the first information is used to indicate the transmission mode of the SL PRS within the first SL PRS resource.

[0339] In some alternative embodiments, the first sidelink channel resource and the first SL PRS resource are a set of associated resources in a time-frequency structure;

[0340] Wherein, the time-frequency structure includes n sets of associated sidelink channel resources and SL PRS resources, and n is an integer greater than 1.

[0341] In some alternative embodiments, the time-frequency structure corresponds to one or more first time domain units in the time domain. The first time domain unit includes m second time domain units, and m is an integer greater than 1;

[0342] The n sidelink channel resources and the n SL PRS resources in the time-frequency structure correspond to different second time domain units;

[0343] The n sidelink channel resources correspond to the same multiple second time-domain units; the multiple second time-domain units corresponding to the same SL PRS resource are continuous in the time domain.

[0344] In some optional embodiments, the n sidelink channel resources respectively correspond to different frequency-domain resources, and the number of frequency-domain resources corresponding to the n sidelink channel resources is the same.

[0345] In some optional embodiments, the starting point of the frequency-domain resources corresponding to the n sidelink channel resources is configured by the network, or pre-configured by the network, or determined based on the frequency-domain resources of the sidelink resource pool corresponding to the first time-domain unit.

[0346] In some optional embodiments, the number of frequency-domain resources corresponding to each sidelink channel resource is configured by the network, or pre-configured by the network, or determined based on n and the frequency-domain resources of the sidelink resource pool.

[0347] In some optional embodiments, the first second time-domain unit among the multiple second time-domain units corresponding to the n sidelink channel resources is used for AGC; the first second time-domain unit among the multiple second time-domain units corresponding to the same SL PRS resource is used for AGC.

[0348] In some optional embodiments, the n SL PRS resources belong to one or more SL PRS sets;

[0349] The SL PRS resources belonging to the same SL PRS set correspond to the same multiple second time-domain units; different SL PRS resources belonging to the same SL PRS set perform frequency-division multiplexing or code-division multiplexing when transmitting SL PRS;

[0350] The SL PRS resources belonging to different SL PRS sets correspond to different multiple second time-domain units.

[0351] In some optional embodiments, different SL PRS resources in the same SL PRS set have the same comb structure and different resource element (RE) offsets.

[0352] In some optional embodiments, the n sidelink channel resources and the n SL PRS resources correspond to each other in sequence according to their respective indexes.

[0353] In some optional embodiments, the n sidelink channel resources determine their indexes in ascending order of frequency domain.

[0354] In some optional embodiments, after the n SL PRS resources are sorted based on the comb offset first and then the set index, they correspond to the n sidelink channel resources;

[0355] Alternatively, after the n SL PRS resources are sorted based on the combined set index and then the comb offset, they correspond to the n sidelink channel resources.

[0356] In some alternative embodiments, the multiple second time domain units corresponding to the n sidelink channel resources are at least two consecutive second time domain units within the same first time domain unit;

[0357] Alternatively, the multiple second time domain units corresponding to the n sidelink channel resources are all the second time domain units within the same first time domain unit.

[0358] In some alternative embodiments, the second time domain units corresponding to the n sidelink channel resources and the second time domain units corresponding to the n SL PRS resources are consecutive;

[0359] Alternatively, the second time domain units corresponding to the n sidelink channel resources and the second time domain units corresponding to the n SL PRS resources do not include the second time domain units for transceiver conversion therebetween.

[0360] In some alternative embodiments, the second time domain units corresponding to at least two SL PRS sets are consecutive;

[0361] Alternatively, the symbols corresponding to at least two SL PRS sets do not include the second time domain units for transceiver conversion therebetween.

[0362] In some alternative embodiments, the last second time domain unit of the time-frequency structure is the second time domain unit for transceiver conversion;

[0363] Alternatively, in the mode of autonomous resource selection, the last second time domain unit of the time-frequency structure is the second time domain unit for transceiver conversion.

[0364] In some alternative embodiments, in the mode of network scheduling resources and when the second condition is satisfied, the last second time domain unit of the time-frequency structure is the second time domain unit for transmitting or receiving SL PRS.

[0365] In some alternative embodiments, the second terminal is a receiving terminal, and the second condition includes at least one of the following:

[0366] The second terminal is configured to receive SL PRS within the last SL PRS set for measuring RSTD;

[0367] The SL PRS set in the next time-frequency structure is configured to measure RSTD.

[0368] In some alternative embodiments, the time-frequency structure corresponds to one or more first time domain units in the time domain, and the first time domain unit includes m second time domain units, where m is an integer greater than 1;

[0369] In the time-frequency structure, the sidelink channel resources and SL PRS resources belonging to the same group correspond to the same set of second time-domain units, and the set of second time-domain units includes at least three consecutive second time-domain units;

[0370] The sidelink channel resources and SL PRS resources belonging to the same group occupy different symbols within the set of second time-domain units.

[0371] In some alternative embodiments, the first second time-domain unit within the set of second time-domain units is used for AGC.

[0372] In some alternative embodiments, n SL PRS resources belong to at least two sets of second time-domain units;

[0373] The SL PRS resources belonging to the same set of second time-domain units correspond to the same set of second time-domain units, and the SL PRS resources belonging to different sets of second time-domain units correspond to different sets of second time-domain units.

[0374] In some alternative embodiments, one or more groups of associated sidelink channel resources and SL PRS resources are included within the same set of second time-domain units;

[0375] One or more different SL PRS resources belonging to the same set of second time-domain units are time-division multiplexed or code-division multiplexed when transmitting SL PRS;

[0376] One or more sidelink channel resources belonging to the same set of second time-domain units correspond to the same one or more second time-domain units. At least two sidelink channel resources respectively correspond to different frequency-domain resources, and the number of frequency-domain resources respectively corresponding to at least two sidelink channel resources is the same.

[0377] In some alternative embodiments, the number of frequency-domain resources corresponding to one or more sidelink channel resources is configured by the network, or pre-configured by the network, or determined based on the number of one or more sidelink channel resources and the number of frequency-domain resources within the sidelink resource pool.

[0378] In some alternative embodiments, different SL PRS resources within the same set of second time-domain units have the same comb structure and different RE offsets.

[0379] In some alternative embodiments, one or more sidelink channel resources and one or more SL PRS resources within the same set of second time-domain units correspond in sequence according to their respective indexes.

[0380] In some alternative embodiments, the second time-domain units corresponding to one or more sidelink channel resources and the second time-domain units corresponding to one or more SL PRS resources within the same set of second time-domain units are consecutive;

[0381] Alternatively, between the second time-domain units corresponding to one or more sidelink channel resources and the second time-domain units corresponding to one or more SL PRS resources in the same set of second time-domain units, there is no second time-domain unit for transceiver conversion.

[0382] In some alternative embodiments, the next second time-domain unit in the set of second time-domain units is a second time-domain unit for transceiver conversion;

[0383] Alternatively, the next second time-domain unit in the set of second time-domain units is the first second time-domain unit of the next set of second time-domain units;

[0384] Alternatively, in the mode of autonomously selecting resources, the next second time-domain unit in the set of second time-domain units is a second time-domain unit for transceiver conversion.

[0385] In some alternative embodiments, in the mode of network scheduling resources and when the second condition is satisfied, the next second time-domain unit in the set of second time-domain units is the first second time-domain unit of the next set of second time-domain units.

[0386] In some alternative embodiments, the second terminal is a receiving terminal, and the second condition includes at least one of the following:

[0387] The second terminal is configured to receive SL PRS within the next set of second time-domain units for measuring RSTD;

[0388] The next set of second time-domain units is configured for measuring RSTD.

[0389] In some alternative embodiments, the next second time-domain unit in the set of second time-domain units is configured by the network, or pre-configured by the network, or agreed upon by the communication protocol.

[0390] In some alternative embodiments, if the set of second time-domain units is the even-numbered set of second time-domain units in the time-frequency structure, the second second time-domain unit in the set of second time-domain units corresponds to the sidelink channel resource, and the next second time-domain unit in the set of second time-domain units is the first second time-domain unit of the next set of second time-domain units;

[0391] If the set of second time-domain units is the odd-numbered set of second time-domain units in the time-frequency structure, the last second time-domain unit in the set of second time-domain units corresponds to the sidelink channel resource, and the next second time-domain unit in the set of second time-domain units is a second time-domain unit for transceiver conversion;

[0392] Wherein, the sets of second time-domain units in the time-frequency structure are indexed starting from 0 in the time-domain order.

[0393] In some alternative embodiments, the n sets of associated sidelink channel resources and SL PRS resources belong to the same sidelink resource pool.

[0394] In some alternative embodiments, the n sidelink channel resources belong to the first sidelink resource pool, and the n SL PRS resources belong to the second sidelink resource pool.

[0395] In some alternative embodiments, the n SL PRS resources belong to one or more SL PRS sets;

[0396] There is a second time domain unit for transceiver conversion between two adjacent SL PRS sets, and / or, there is no second time domain unit for transceiver conversion between two adjacent SL PRS sets.

[0397] In some alternative embodiments, one or more SL PRS sets are included within the same first time domain unit, and the second time domain units corresponding to different SL PRS sets are different.

[0398] In some alternative embodiments, multiple SL PRS sets are included within the same first time domain unit;

[0399] The last second time domain unit within the same first time domain unit is the second time domain unit for transceiver conversion.

[0400] In some alternative embodiments, multiple SL PRS sets are included within the same first time domain unit;

[0401] The next second time domain unit of the previous SL PRS set between two adjacent SL PRS sets is the first second time domain unit of the next SL PRS set;

[0402] Or, both of two adjacent SL PRS sets are configured to measure RSTD, and the next second time domain unit of the previous SL PRS set between two adjacent SL PRS sets is the first second time domain unit of the next SL PRS set;

[0403] Or, any one of two adjacent SL PRS sets is not configured to measure RSTD, and the next second time domain unit of the previous SL PRS set between two adjacent SL PRS sets is the second time domain unit for transceiver conversion.

[0404] It should be noted that when the device provided in the above embodiments realizes its functions, only the above-mentioned division of each functional module is used for illustration. In practical applications, the above functions can be allocated to different functional modules according to actual needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0405] Regarding the device in the above embodiments, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0406] Figure 17 FIG. 5 is a schematic structural diagram of a terminal provided by an exemplary embodiment of the present application. The terminal 1700 includes: a processor 1701, a receiver 1702, a transmitter 1703, a memory 1704, and a bus 1705.

[0407] The processor 1701 includes one or more processing cores. The processor 1701 executes various functional applications and information processing by running software programs and modules.

[0408] The receiver 1702 and the transmitter 1703 can be implemented as a communication component, and the communication component can be a communication chip.

[0409] The memory 1704 is connected to the processor 1701 through the bus 1705. The memory 1704 can be used to store at least one instruction, and the processor 1701 is used to execute the at least one instruction to implement each step in the above method embodiments.

[0410] In addition, the memory 1704 can be implemented by any type of volatile or non-volatile storage device or a combination thereof. The volatile or non-volatile storage devices include but are not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static random-access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM).

[0411] An embodiment of the present application further provides a computer-readable storage medium. A computer program is stored in the computer-readable storage medium, and the computer program is used to be executed by a terminal to implement the above SL PRS sending method or the SL PRS receiving method.

[0412] Optionally, the computer-readable storage medium may include: Read-Only Memory (ROM), Random-Access Memory (RAM), Solid State Drives (SSD), optical discs, etc. Among them, the random access memory may include Resistance Random Access Memory (ReRAM) and Dynamic Random Access Memory (DRAM).

[0413] An embodiment of this application also provides a chip, which includes programmable logic circuits and / or program instructions. When a terminal installed with the chip runs, it is used to implement the above SL PRS sending method, or the SL PRS receiving method.

[0414] An embodiment of this application also provides a computer program product or a computer program. The computer program product or the computer program includes computer instructions. The computer instructions are stored in a computer-readable storage medium. The terminal reads and executes the computer instructions from the computer-readable storage medium to implement the above SL PRS sending method, or the SL PRS receiving method.

[0415] Those skilled in the art should be able to realize that in one or more of the above examples, the functions described in the embodiments of this application can be implemented by hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. The computer-readable medium includes computer storage media and communication media, where the communication media includes any medium that facilitates the transmission of a computer program from one place to another. The storage media can be any available medium accessible by a general-purpose or special-purpose computer.

[0416] The above are only optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. A method for transmitting a sidelink positioning reference signal (SL PRS), characterized in that, the method is executed by a first terminal, and the method includes: transmitting first information on a first sidelink channel resource and transmitting a first SL PRS on a first SL PRS resource; wherein the first information is used to indicate the transmission manner of the SL PRS within the first SL PRS resource.

2. The method according to claim 1, characterized in that, the first sidelink channel resource and the first SL PRS resource are a set of associated resources in a time-frequency structure; wherein the time-frequency structure includes n sets of associated sidelink channel resources and SL PRS resources, and n is an integer greater than 1.

3. The method according to claim 2, characterized in that, the time-frequency structure corresponds to one or more first time-domain units in the time domain, and the first time-domain unit includes m second time-domain units, and m is an integer greater than 1; the n sidelink channel resources and the n SL PRS resources in the time-frequency structure correspond to different second time-domain units; the n sidelink channel resources correspond to the same multiple second time-domain units; the multiple second time-domain units corresponding to the same SL PRS resource are continuous in the time domain.

4. The method according to claim 3, characterized in that, the n sidelink channel resources respectively correspond to different frequency-domain resources, and the number of frequency-domain resources respectively corresponding to the n sidelink channel resources is the same; wherein the starting point of the frequency-domain resources corresponding to the n sidelink channel resources is configured by the network, or pre-configured by the network, or determined based on the frequency-domain resources of the sidelink resource pool corresponding to the time slot; or the number of frequency-domain resources corresponding to each sidelink channel resource is configured by the network, or pre-configured by the network, or determined based on the n and the frequency-domain resources of the sidelink resource pool.

5. The method according to claim 3, characterized in that, the first second time-domain unit among the multiple second time-domain units corresponding to the n sidelink channel resources is used for automatic gain control (AGC); the first second time-domain unit among the multiple second time-domain units corresponding to the same SL PRS resource is used for AGC; or the n SL PRS resources belong to one or more SL PRS sets; the SL PRS resources belonging to the same SL PRS set correspond to the same multiple second time-domain units; different SL PRS resources belonging to the same SL PRS set are frequency-division multiplexed or code-division multiplexed when transmitting SL PRS; the SL PRS resources belonging to different SL PRS sets correspond to different multiple second time-domain units.

6. The method according to claim 5, characterized in that, different SL PRS resources in the same SL PRS set have the same comb structure and different RE offsets; wherein the n sidelink channel resources and the n SL PRS resources correspond in sequence according to their respective indexes.

7. The method according to any one of claims 3 to 6, characterized in that, The multiple second time domain units corresponding to the n sidelink channel resources are at least two consecutive second time domain units within the same first time domain unit; or, The multiple second time domain units corresponding to the n sidelink channel resources are all the second time domain units within the same first time domain unit; Or, The last second time domain unit of the time-frequency structure is a second time domain unit for transceiver conversion; or, In the mode of autonomously selecting resources, the last second time domain unit of the time-frequency structure is a second time domain unit for transceiver conversion.

8. The method according to claim 5 or 6, Characterized in that, The second time domain units corresponding to the one or more SL PRS sets are consecutive; Or, There is no second time domain unit for transceiver conversion between the second time domain units corresponding to the one or more SL PRS sets.

9. A method for receiving SL PRS, Characterized in that, The method is executed by a second terminal, and the method includes: Receiving first information on a first sidelink channel resource and receiving a first SL PRS on a first SL PRS resource; Wherein, the first information is used to indicate the sending mode of the SL PRS within the first SL PRS resource.

10. A terminal, Characterized in that, The terminal includes: A processor; A transceiver connected to the processor; A memory for storing executable instructions of the processor; Wherein, the processor is configured to load the executable instructions so that the terminal implements the SL PRS sending method according to any one of claims 1 to 8, or the SL PRS receiving method according to claim 9.

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