Method, apparatus, and terminal for transmitting positioning reference signals (PRS).

Abstract

The present application discloses a method, an apparatus and a terminal for transmitting a positioning reference signal (PRS), which belong to the technical field of communication. The method includes a step of a first terminal mapping a sidelink positioning reference signal (SL-PRS) to a physical sidelink shared channel (PSSCH) resource based on first mapping information, and transmitting the sidelink positioning reference signal (SL-PRS) to the physical sidelink shared channel (PSSCH) resource, the first mapping information including at least one of a relationship between a bandwidth of the SL-PRS and a bandwidth of the PSSCH resource, symbol information of the PSSCH resource occupied by the SL-PRS, and a time division multiplexing (TDM) mode of the SL-PRS and the PSSCH.

Description

[Technical Field]

[0001] (Cross-reference of related applications) This application claims priority to Chinese Patent Application No. 202210360210.6, filed in China on April 6, 2022, the entire contents of which are incorporated herein by reference.

[0002] This application relates to the field of communications technology, and more specifically to a method, apparatus, and terminal for transmitting positioning reference signals (PRS). [Background technology]

[0003] Long-Term Evolution (LTE) systems support sidelink transmission, that is, direct data transmission between user equipment (UEs) at the physical layer. LTE sidelink is broadcast-based and can be used for basic secure communication in vehicle-to-vehicle and vehicle-to-infrastructure (V2X) communications, but it cannot be used for more advanced V2X services. 5G New Radio (NR) systems can support more advanced sidelink transmission designs, such as unicast, multicast, and groupcast, thus supporting a wider range of service types.

[0004] NR V2X defines two resource allocation modes: mode 1, in which the base station schedules resources, and mode 2, in which the UE itself determines the resources to be used for transmission. In this case, resource information can originate from broadcast messages from the base station or from preset information. If the UE is operating within the base station range and a Radio Resource Control (RRC) connection with the base station exists, it can operate in mode 1 and / or mode 2. If the UE is operating within the base station range but no RRC connection with the base station exists, it can only operate in mode 2. If the UE is outside the base station range, it can only operate in mode 2, which performs V2X transmission based on preset information.

[0005] The specific operation method of mode 2 is described below. 1) When resource selection is triggered, the transmitting UE first determines the resource selection window. The lower limit of the resource selection window is set to time T1, which is after the resource selection trigger, and the upper limit of resource selection is set to time T2, which is after the trigger. T2 is the value selected by the UE's implementation means within the Packet Delay Budget (PDB) to be transmitted in that transmission block (TB), and T2 is T1 or later. 2) Before resource selection, the UE needs to determine a candidate resource set. The UE may compare the measured Reference Signal Receiving Power (RSRP) for resources within the resource selection window with the corresponding RSRP threshold, and include resources with RSRP lower than the RSRP threshold in the candidate resource set. 3) After determining the resource set, the UE randomly selects a transmission resource from the candidate resource set. The UE may also reserve transmission resources for later transmissions in the current transmission.

[0006] Currently, in V2X scenarios, there are various demands for absolute and relative positioning, but current technology does not provide a method for transmitting side-link positioning reference signals in V2X scenarios. [Overview of the project] [Problems that the invention aims to solve]

[0007] The embodiments of this application provide a method, apparatus, and terminal for transmitting a positioning reference signal (PRS) that can solve the problem in the prior art of not defining a method for transmitting a sidelink positioning reference signal in a V2X scenario. [Means for solving the problem]

[0008] In the first aspect, the first terminal includes the step of mapping and transmitting a sidelink SL-PRS to a physical sidelink shared channel PSSCH resource based on first mapping information, wherein the first mapping information is Relationship between SL-PRS bandwidth and PSSCH resource bandwidth, Symbol information of PSSCH resources occupied by SL-PRS, Including at least one of the time-division multiplexing TDM modes of SL-PRS and PSSCH, This invention provides a method for transmitting a positioning reference signal (PRS).

[0009] In the second aspect, the second terminal includes the step of measuring the sidelink SL-PRS based on first mapping information, wherein the first mapping information is for instructing the mapping rules of the SL-PRS to the PSSCH resource, and the first mapping information is Relationship between SL-PRS bandwidth and PSSCH resource bandwidth, Symbol information of PSSCH resources occupied by SL-PRS, Including at least one of the time-division multiplexing TDM modes of SL-PRS and PSSCH, This invention provides a method for transmitting a positioning reference signal (PRS).

[0010] In the third aspect, a transmission module is provided for mapping and transmitting a sidelink SL-PRS to a physical sidelink shared channel PSSCH resource based on first mapping information, wherein the first mapping information is Relationship between SL-PRS bandwidth and PSSCH resource bandwidth, Symbol information of PSSCH resources occupied by SL-PRS, Including at least one of the time-division multiplexing TDM modes of SL-PRS and PSSCH, The present invention provides a transmission device for the positioning reference signal PRS.

[0011] On the fourth side, a measurement module is provided for measuring the sidelink SL-PRS based on first mapping information, wherein the first mapping information is for instructing the mapping rules of the SL-PRS to the PSSCH resource, and the first mapping information is Relationship between SL-PRS bandwidth and PSSCH resource bandwidth, Symbol information of PSSCH resources occupied by SL-PRS, Including at least one of the time-division multiplexing TDM modes of SL-PRS and PSSCH, The present invention provides a transmission device for the positioning reference signal PRS.

[0012] In the fifth aspect, a terminal is provided comprising a processor and memory, wherein the memory stores a program or command executable by the processor, and when the program or command is executed by the processor, a step of the method described in the first aspect is realized, or a step of the method described in the second aspect is realized.

[0013] In the sixth aspect, a terminal comprising a processor and a communication interface, wherein the processor maps and transmits a sidelink SL-PRS to a physical sidelink shared channel PSSCH resource based on first mapping information, and the first mapping information is Relationship between SL-PRS bandwidth and PSSCH resource bandwidth, Symbol information of the PSSCH resource occupied by the SL-PRS Provided is a terminal including at least one of the symbol information of the PSSCH resource occupied by the SL-PRS and the time division multiplexing (TDM) mode of the SL-PRS and the PSSCH.

[0014] In a seventh aspect, there is provided a terminal comprising a processor and a communication interface, wherein the processor is for measuring a sidelink (SL)-PRS based on first mapping information, the first mapping information is for indicating a mapping rule of the SL-PRS to a PSSCH resource, and the first mapping information includes The relationship between the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource Symbol information of the PSSCH resource occupied by the SL-PRS Provided is a terminal including at least one of the symbol information of the PSSCH resource occupied by the SL-PRS and the time division multiplexing (TDM) mode of the SL-PRS and the PSSCH.

[0015] In an eighth aspect, provided is a readable storage medium storing a program or command which, when executed by a processor, realizes the steps of the method described in the first aspect or the steps of the method described in the second aspect.

[0016] In a ninth aspect, provided is a chip comprising a combined processor and a communication interface, wherein the processor executes a program or command to realize the method described in the first aspect or the method described in the second aspect.

[0017] In a tenth aspect, provided is a computer program / product stored in a storage medium and, when executed by at least one processor, realizing the steps of the method described in the first aspect or the steps of the method described in the second aspect.

Advantages of the Invention

[0018] In the embodiment of the present invention, the first terminal maps and transmits SL-PRS to a PSSCH resource based on the determined first mapping information. The corresponding second terminal measures the SL-PRS based on the first mapping information. This makes it possible to meet the demand for positioning for the resource while avoiding interference with the data signal due to positioning. [Brief explanation of the drawing]

[0019] [Figure 1] Block diagram showing an applicable wireless communication system according to an embodiment of the present invention. [Figure 2] This is flowchart 1 showing the steps of the method for transmitting a positioning reference signal PRS provided by an embodiment of the present invention. [Figure 3] This is illustrative Figure 1 showing the case in the transmission method of a positioning reference signal PRS provided by the embodiment of the present application where the bandwidth of SL-PRS and the bandwidth of the PSSCH resource are the same. [Figure 4] This is an illustrative diagram 2 showing the case in the transmission method of the positioning reference signal PRS provided by the embodiment of the present invention where the bandwidth of SL-PRS and the bandwidth of the PSSCH resource are the same. [Figure 5] This is illustrative figure 1 showing a case in which the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are different in the method for transmitting a positioning reference signal PRS provided by the embodiment of the present invention. [Figure 6] This is an illustrative diagram 2 showing a case in which the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are different in the method for transmitting a positioning reference signal PRS provided by the embodiment of the present invention. [Figure 7] This is Figure 3, an example illustrating the case in the transmission method of the positioning reference signal PRS provided by the embodiment of the present invention where the bandwidth of SL-PRS and the bandwidth of the PSSCH resource are different. [Figure 8] This is Figure 4, an illustrative diagram showing a case in which the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are different in the method for transmitting a positioning reference signal PRS provided by the embodiment of the present application. [Figure 9]This figure shows an example of mapping between SL-PRS and PSSCH resources in an embodiment of the present invention. [Figure 10] This figure shows an example of mapping between SL-PRS and PSSCH resources in an embodiment of the present invention. [Figure 11] This figure shows an example of mapping between SL-PRS and PSSCH resources in an embodiment of the present invention. [Figure 12] This figure shows an example of mapping between SL-PRS and PSSCH resources in an embodiment of the present invention. [Figure 13] This figure shows an example of mapping between SL-PRS and PSSCH resources in an embodiment of the present invention. [Figure 14] This figure shows an example of mapping between SL-PRS and PSSCH resources in an embodiment of the present invention. [Figure 15] This figure shows an example of mapping between SL-PRS and PSSCH resources in an embodiment of the present invention. [Figure 16] This figure shows an example of mapping between SL-PRS and PSSCH resources in an embodiment of the present invention. [Figure 17] This is an illustrative diagram showing the case where the comb value of SL-PRS is 1 in an embodiment of the present application. [Figure 18] This is an illustrative diagram showing the mapping of SL-PRS when the comb value of SL-PRS is 2 in an embodiment of the present application. [Figure 19] This is an illustrative diagram showing the SL-PRS mapping when the comb value of SL-PRS is 4 in an embodiment of the present application. [Figure 20] This is flowchart number 2 showing the steps of the method for transmitting a positioning reference signal PRS provided by the embodiment of the present invention. [Figure 21] This is schematic diagram 1 showing the structure of the PRS transmission device provided by the embodiment of the present invention. [Figure 22] This is a schematic diagram (part 2) showing the structure of the PRS transmission device provided by the embodiment of the present invention. [Figure 23] This is schematic diagram 1 showing the structure of the terminal provided by the embodiment of the present invention. [Figure 24] This is a schematic diagram (part 2) showing the structure of the terminal provided by the embodiment of the present invention. [Modes for carrying out the invention]

[0020] In the following, the technical solutions in the embodiments of this application will be clearly and completely described with reference to the drawings of the embodiments of this application. Naturally, the embodiments described are only a part of the embodiments of this application, not all of them. All other embodiments that a person skilled in the art could obtain based on the embodiments of this application without requiring any creative effort are all within the scope of protection of this application.

[0021] The technical terms such as "first," "second," etc., in the description and claims of the embodiments of this application do not describe a specific order of subjects, but are used to distinguish different subjects. The terms used in this manner may, in some cases, be interchangeable so that the embodiments of this application can be carried out in an order other than that illustrated or described herein. The subjects distinguished by "first," "second," etc., are usually similar, and the number of subjects is not limited; for example, the first subject may be one or more. Furthermore, in the description and claims, "and / or" indicates at least one of the connected subjects, and the symbol " / " generally indicates that the preceding and following related subjects are in an "or" relationship.

[0022] It should be noted that the technologies described in the embodiments of this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but are also applicable to other wireless communication systems such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single-carrier Frequency-Division Multiple Access (SC-FDMA), as well as to other systems. In the embodiments of this application, the terms "system" and "network" are often used interchangeably, and the technologies described herein may be used with the above-mentioned systems and wireless communication technologies, or with other systems and wireless communication technologies. However, for illustrative purposes, the following description will use the New Radio (NR) system, and the majority of the following description will use NR terminology. These technologies are applicable to systems other than NR, such as the 6th Generation (6G) communication system.

[0023] Figure 1 is a block diagram illustrating an applicable wireless communication system according to an embodiment of the present invention. The wireless communication system comprises a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, tablet computer, laptop computer (also called notebook computer), personal digital assistant (PDA), personal information terminal, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR) / virtual reality (VR), robot, wearable device, vehicle user equipment (VUE), pedestrian user equipment (PUE), smart home device (household device with wireless communication capabilities, such as a refrigerator, television, washing machine, furniture, etc.), game console, personal computer (PC), ATM, self-service device, or other terminal-side device. Wearable devices include smart watches, smart bracelets, smart earphones, smart glasses, smart accessories (smart bangles, smart hand chains, smart rings, smart necklaces, smart anklets, etc.), smart wristbands, smart clothing, etc. In the embodiments of this application, the specific type of terminal 11 is not limited. The network-side equipment 12 may include an access network device or a core network. The access network equipment 12 is also called a radio access network device, radio access network (RAN), radio access network function, or access network unit.Access network devices may also be called base stations, Wireless Local Area Networks (WLANs), or Wireless Fidelity (WiFi). Base stations may also be called node B, advanced node B, access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), B node, advanced B node (eNB), home B node, home advanced B node, WLAN access point, WiFi node, transmission and reception point (TRP), or other appropriate terms in the art. The term "base station" is not limited to specific technical terms as long as the same technical effect is achieved. In the embodiments of this application, only base stations in NR systems are given as examples, but the specific type of base station is not limited.

[0024] Next, with reference to the drawings, the method, apparatus, and terminal for transmitting a positioning reference signal (PRS) provided by the embodiments of this application will be described in detail by referring to several embodiments and their application scenarios.

[0025] In the embodiment of the present application, with respect to the positioning signal or SL-PRS, Selectively, the SL-PRS signal may also be the SL signal for positioning. Selectively, the SL-PRS signal may be a multiplexed NR positioning signal, a prior art SL signal or augmentation, such as a Channel Status Information Reference Signal (CSI-RS), a Sidelink Synchronization Signal Block (S-SSB), a Tracking Reference Signal (TRS), or a Demodulation Reference Signal (DMRS). Optionally, the SL-PRS signal may be an extension of the NR positioning signal, which is specifically defined for positioning, up to the sidelink. The signal includes, but is not limited to, gold code serial, m serial, and ZC serial. Optionally, the SL-PRS signal may also be a sidelink positioning signal defined specifically for positioning.

[0026] As shown in Figure 2, an embodiment of the present application is Step 201 includes the first terminal mapping and transmitting a sidelink SL-PRS to a Physical Sidelink Shared Channel (PSSCH) resource based on first mapping information, wherein the first mapping information is Relationship between SL-PRS bandwidth and PSSCH resource bandwidth, Symbol information of PSSCH resources occupied by SL-PRS, The present invention further provides a method for transmitting a positioning reference signal PRS, which includes at least one of the time division multiplexing (TDM) modes of SL-PRS and PSSCH.

[0027] Selectively, the PSSCH resources described in the embodiments of the present application are scheduled PSSCH resources, specifically, PSSCH resources are scheduled by scheduling instruction information for scheduling PSSCH. For example, the scheduling instruction information is: Bandwidth of scheduled PSSCH resources, The starting frequency domain position of the scheduled PSSCH resource, It includes at least one slot for scheduling PSSCH.

[0028] In the embodiments of the present invention, PSSCH resources are scheduled by scheduling instruction information as a means for scheduling. For example, the scheduling instruction information is Sidelink Control Information (SCI), and includes 1st SCI or 2nd SCI. Selectively, the scheduled PSSCH resources may occupy 6 to 13 symbols (6 to 13 symbols in one SL slot).

[0029] As an example of a selectable embodiment, the PRS transmission method described above is specifically a PRS transmission method between a first terminal and a second terminal, where the first terminal maps the SL-PRS to the scheduled PSSCH resource and transmits it to the second terminal. The first terminal may also be the transmitting terminal, in which case the second terminal may be the receiving terminal. Alternatively, the first terminal may be the scheduling terminal, in which case the second terminal may be the transmitting terminal. Alternatively, the first terminal may be the scheduling terminal, in which case the second terminal may be the receiving terminal. These examples will not be listed individually here.

[0030] Furthermore, in the embodiment of the present invention, the first terminal and the second terminal need to have a consistent understanding of the SL-PRS mapping means to the scheduled PSSCH resource. That is, when the first terminal maps and transmits an SL-PRS to a scheduled PSSCH resource based on the first mapping information, the second terminal can also determine the position of the SL-PRS in the scheduled PSSCH resource based on the first mapping information in order to receive and analyze the PSSCH and SL-PRS in the PSSCH resource.

[0031] In one selectable embodiment, the second terminal, acting as a receiving terminal, measures the SL-PRS based on the first mapping rule.

[0032] In one selectable embodiment, the second terminal, acting as a receiving terminal, measures the SL-PRS based on the first mapping rule and the SL-PRS preset information.

[0033] In one selectable embodiment, the second terminal, acting as a receiving terminal, measures the SL-PRS based on the first mapping rule and the scheduling information of the PSSCH.

[0034] In at least one selectable embodiment of the present application, the method is The process further includes the step of determining whether the first terminal transmits the SL-PRS in the PSSCH resource according to the first mode, the first mode including at least one of the following:

[0035] A scheduling instruction for scheduling a PSSCH. For example, a scheduling instruction for scheduling a PSSCH is SCI, or 1st SCI, or 2nd SCI. Optionally, the instruction may be a single bit indicating whether or not the SL-PRS is transmitted in the slot where the currently scheduled PSSCH resource or SCI is installed. Optionally, if the scheduling instruction information for scheduling a PSSCH includes multiple PSSCH resources, the specific PSSCH resource on which the SL-PRS is transmitted may be indicated by two or three bits.

[0036] Instructions based on resource pool configuration information. The resource pool configuration information is configured by the network, or instructed by the network, or configured by a terminal, or instructed by a terminal, or instructed by a higher layer. Optionally, the resource pool configuration information may include 1 bit indicating whether or not the current resource pool is capable of SL-PRS multiplexing. Optionally, the resource pool configuration information may include dedicated resource information available for SL-PRS multiplexing. Optionally, the resource pool configuration information may include SL-PRS priority instruction information enabling SL-PRS multiplexing. Optionally, the resource pool configuration information may include symbol information, maximum resource occupancy, or maximum number of symbols enabling SL-PRS multiplexing.

[0037] The granularity of the resource pool configuration information can be selected as follows: Each resource pool, Each service quality (Quality of Service, QoS), Each logical channel, Each logical channel group, Channel Busy Ratio (CBR) for each channel, It includes at least one of the following: Channel Occupancy Ratio (CR).

[0038] In other words, the resource pool configuration information described above may be parameters set for each resource pool, or parameters set for each QoS, or parameters set for each logical channel, or parameters set for each logical channel group, or parameters set for each CBR, or parameters set for each CR.

[0039] For example, the resource pool configuration information may include SL-PRS priority instruction information for multiplexing by multiple SL-PRS corresponding to different QoS or different logical channels.

[0040] In another selectable embodiment of the present application, the method is: The first terminal further includes the step of determining the first mapping information based on the first rule and / or first information, and the first information is Number of symbols for the Physical Sidelink Control Channel (PSCCH), Number of symbols in PSSCH, PSSCH start symbol, Pattern of the Demodulation Reference Signal (DMRS) SL-PRS pattern, SL-PRS start symbol, A combined pattern of SL-PRS and DMRS. Period of the Physical Sidelink Feedback Channel (PSFCH) It includes at least one of the following: SL-PRS and PSSCH TDM configuration information. For example, the TDM configuration information may indicate that SL-PRS and PSSCH are slot-based TDM, or that SL-PRS and PSSCH are symbol-based TDM.

[0041] Selectively, the first information includes preset information for the SL-PRS, and includes at least one of the number of symbols for the SL-PRS, the comb value, the SL-PRS pattern, and the SL-PRS start symbol.

[0042] Selectively, the first information includes preset information for the SL-PRS, which includes frequency domain information, and for example, at least one of the bandwidth of the SL-PRS and the relationship between the SL-PRS and the PSSCH.

[0043] In selectable embodiments, the SL-PRS pattern may include multiple types in the preset information. The pattern specifically used for SL-PRS transmission may be determined based on a first rule or scheduling information (e.g., SCI).

[0044] The first rule is indicated by scheduling instruction information for scheduling PSSCH, or by resource pool configuration information, or is a predefined SL-PRS mapping rule.

[0045] Selectively, the first rule includes the relationship between SL-PRS(pattern, number of symbols, comb, start symbol) and the number of symbols of the PSCCH, or the relationship between SL-PRS(pattern, number of symbols, comb, start symbol) and the number of symbols of the PSSCH / symbol position, or the relationship between SL-PRS(pattern, number of symbols, comb, start symbol) and the DMRS.

[0046] The PSFCH period is selected and indicated by the resource pool configuration information. For example, among the P={0,1,2,4} slots, there are slots where no PSFCH exists. Setting it to 0 indicates that no PSFCH resources exist in that resource pool.

[0047] In at least one embodiment of the present application, the first terminal may determine the first mapping information based solely on the first rule, or it may determine the first mapping information based on both the first rule and the first information. This is not a limiting representation.

[0048] As a selectable embodiment, the relationship between the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource is: The bandwidth of SL-PRS and the bandwidth of PSSCH resources must be the same. Or, This includes the fact that the bandwidth of SL-PRS and the bandwidth of PSSCH resources are different.

[0049] For example, resource pool configuration information or scheduling instruction signaling may indicate whether the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are the same or different. Alternatively, for example, a protocol may predefine or indicate whether the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are the same or different.

[0050] The fact that the bandwidth of the SL-PRS and the bandwidth of the scheduled PSSCH resource are the same can be understood as meaning that the size and location of the bandwidths are the same. For example, as shown in Figures 3 and 4, the first symbol is for Automatic Gain Control (AGC), the last symbol is for measuring the gap, and the SCI is for scheduling the PSSCH resource. It can also be understood that the SL-PRS is transmitted within the frequency domain range of the PSSCH resource and shares the same bandwidth in the same frequency domain.

[0051] In at least one embodiment of the present application, there are two cases where the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are different. Case 1 is the case where the SL-PRS and the PSSCH that is actually transmitted are time-division multiplexed, as shown in Figures 5 and 6. Case 2 is when the SL-PRS and the PSSCH that is actually transmitted are frequency-division multiplexed, as shown in Figures 7 and 8.

[0052] As a selectable embodiment, in Case 1, when the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are different, and the SL-PRS and PSSCH are time-division multiplexed, the scheduling instruction information or the resource pool setting information further, The bandwidth of the aforementioned SL-PRS, The change in bandwidth of the SL-PRS relative to the bandwidth of the PSSCH resource, for example, the increased bandwidth of the SL-PRS compared to the PSSCH. The starting frequency range position of the SL-PRS, This is used to indicate at least one of the following: the offset information of the SL-PRS start frequency domain position relative to the start frequency domain position of the PSSCH resource.

[0053] For example, the bandwidth of the SL-PRS is indicated by the SCI, or the bandwidth of the SL-PRS is increased compared to that of the PSSCH, and this is indicated by the SCI.

[0054] Furthermore, for example, the starting frequency range position of the SL-PRS is indicated by the SCI, or the starting frequency range position of the SL-PRS, which is offset relative to the PSSCH, is indicated by the SCI.

[0055] If a single selectable SL-PRS bandwidth is predefined or specified in the protocol, it is not necessary to specify the SL-PRS bandwidth during scheduling. Alternatively, if multiple (e.g., N) selectable SL-PRS bandwidths are predefined or specified in the protocol, it is necessary to specify one of the N that will be used during scheduling.

[0056] Selectively, the first rule specifies the bandwidth of the N SL-PRS.

[0057] Selectively, the first rule indicates the relationship between the SL-PRS bandwidth and the PSSCH bandwidth in the aforementioned different cases (for example, in different PSSCH bandwidths).

[0058] Selectively, the first rule specifies how to determine the SL-PRS bandwidth based on the PSSCH bandwidth.

[0059] Furthermore, if the bandwidth of one selectable SL-PRS is predefined or predetermined in the protocol, the scheduling instruction information may selectably indicate the start frequency range position or the end frequency range position of the SL-PRS.

[0060] Furthermore, if a single selectable SL-PRS start frequency range position, or the relationship between the SL-PRS start frequency range position and the PSSCH / PSCCH start frequency range position, is predefined or predetermined by the protocol, the scheduling instruction information may selectably indicate information regarding the bandwidth of the SL-PRS.

[0061] In another possible embodiment, in case 2, if the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are different, and the SL-PRS and PSSCH are frequency-division multiplexed, the scheduling instruction information or the resource pool setting information further, Bandwidth allocation information for the PSSCH resources occupied by the aforementioned SL-PRS, The bandwidth of the aforementioned SL-PRS, This is used to indicate at least one of the following: the bandwidth of the SL-PRS relative to the bandwidth of the PSSCH resource.

[0062] Similarly, if one selectable SL-PRS bandwidth is protocol-predefined or predefined, it is not necessary to specify the SL-PRS bandwidth during scheduling. Alternatively, if multiple (e.g., N) selectable SL-PRS bandwidths are protocol-predefined or predefined, it is necessary to specify one of the N to be used during scheduling.

[0063] Selectively, the first rule specifies the FDM modes of the SL-PRS and PSSCH, and selectively, the ratio of SL-PRS in FDM.

[0064] Selectively, the first rule specifies the bandwidth of the N SL-PRS.

[0065] In the case of option 2, the step of the first terminal mapping and transmitting SL-PRS to the PSSCH resource is: The first terminal includes the step of performing rate matching or puncturing on the SL data channel or SL signal in the PSSCH resource.

[0066] In case 2, the method is selectable. The first terminal further includes the step of determining a gap between the SL-PRS and the SL channel based on a predefined, network-configured, or terminal-configured setting.

[0067] The above SL channel includes at least one of SL PSSCH, SL PSFCH, and SL PSCCH. In other words, the gap between SL-PRS and the SL channel is determined by a protocol pre-definition, network configuration, or terminal configuration. Low interference can be ensured by this gap during inband transmission.

[0068] Furthermore, the time-frequency division allocation of the SL-PRS must be determined based on both the "relationship between the bandwidth of the SL-PRS and the bandwidth of the PSSCH resources" and the "symbol information of the PSSCH resources occupied by the SL-PRS."

[0069] In at least one embodiment of the present application, the symbol information of the PSSCH resource occupied by the SL-PRS is, At least one of the following for the PSSCH resource occupied by SL-PRS: symbol position, number of symbols, and starting symbol. A pattern of the SL-PRS to indicate at least two of the following: the number of symbols in the PSSCH resource occupied by the SL-PRS, the symbol position, the starting symbol, and the comb value of the SL-PRS. It includes at least one of the following.

[0070] In one embodiment, the first rule further defined selectable SL-PRS patterns.

[0071] In one embodiment, the first rule further defines the symbol locations of the PSSCH resources occupied by the selectable SL-PRS. Selectably, it instructs that one symbol location be selected from multiple symbol locations for a single resource pool.

[0072] In one embodiment, the first rule further defines the symbolic locations of PSSCH resources occupied by multiple SL-PRS. Selectively, the symbolic locations of the PSSCH resources occupied by the multiple SL-PRS are determined based on first scheduling information (one of which is indicated by the SCI), or the relationship between the SL-PRS symbolic locations and PSSCH information or DMRS is indicated by the first rule, and the symbolic locations of the SL-PRS can be estimated based on the determined PSSCH information or DMRS.

[0073] At least one of the symbol position, number of symbols, starting symbol, and comb value of the PSSCH resource occupied by the SL-PRS is associated with the second information, and the second information is, The symbol length of the physical sidelink control channel PSCCH, e.g., {2,3}. The start symbol for PSSCH, for example, {2,4,5}. The symbol length of PSSCH, for example, {6, 7, 8, 9, 10, 11, 12, 13}. The pattern of the demodulation reference signal DMRS, for example, the number of symbols occupied by the DMRS, the symbol positions of the DMRS, The system includes at least one of the following: whether or not the slot where the SL-PRS is located contains a physical side-link feedback ChannelPSFCH resource.

[0074] As an optional embodiment, the SL-PRS pattern may be indicated together with the DMRS pattern.

[0075] In another possible embodiment, the correspondence between SL-PRS patterns and DMRS patterns is indicated or predetermined by the protocol.

[0076] The start symbol for the scheduled PSSCH resource occupied by the aforementioned SL-PRS is one of the following:

[0077] 1) The start symbol of PSSCH. For example, the start symbol of SL-PRS may be located at the same position as the start symbol of PSSCH only if the start symbol of PSSCH and the start symbol of PSCCH are different, i.e., the start symbol of PSSCH is not 2.

[0078] 2) The N1th symbol that is later than the PSSCH start symbol. If the start symbol of the scheduled PSSCH resource occupied by the SL-PRS is the N1th symbol that is later than the PSSCH start symbol, the value of N1 is associated with whether or not the PSSCH start symbol and the PSSCH start symbol are the same.

[0079] For example, if the start symbol of PSCCH and the start symbol of PSSCH are the same, and the start symbol of PSSCH is 2, then the start symbol of SL-PRS is located at the start symbol of PSSCH + N1'. Alternatively, it can be understood that the start symbol of SL-PRS is located at the last symbol position of PSCCH + N1. Furthermore, for example, if the starting symbols of PSCCH and PSSCH are different, and the starting symbol of PSSCH is 4 or 5, then the starting symbol of SL-PRS is located at the starting symbol of PSSCH + N1''. It can also be understood that the starting symbol of SL-PRS is located at the last symbol position of PSCCH + N1. The values ​​of N1' and N1'' are different.

[0080] 3) The N2th symbol of the PSSCH resource. Optionally, the value of N2 may be determined based on the symbol length of the PSSCH. For example, for PSSCH symbol lengths {6, 7, 8, 9, 10, 11, 12, 13}, the value of N2 may not be exactly the same, may be exactly the same, or may be completely different.

[0081] 4) The N3th symbol after the last symbol of PSCCH. The specific value of N3 may be determined depending on whether the last symbol of PSCCH is symbol 3 or symbol 4, and the value of N3 may be different.

[0082] 5) Selectable symbols associated with the DMRS pattern and the number of symbols occupied by PSSCH.

[0083] 6) The N4th symbol after the DMRS symbol position. Selectively, N4 is 1. Furthermore, selectively, the DMRS symbol position may be the last symbol position or an intermediate symbol position. For example, in the case of two DMRS symbols, the DMRS symbol position is the corresponding last symbol position. Also, for example, in the case of two or more DMRS symbols, the DMRS symbol position is the corresponding second DMRS symbol position.

[0084] 7) The N5th symbol before the last DMRS symbol position. This can also be understood as the N5th symbol before the last DMRS symbol position occupied by an SL-PRS symbol position. For example, if there are more than two DMRS symbols and the last DMRS symbol transmission is canceled, the SL-PRS symbol position is {DMRS Ending位置 -N5~DMRS Ending位置}. Also, for example, if there are more than two DMRS symbols and the last DMRS symbol transmission is not occupied, the symbol position of SL-PRS will be {DMRS Ending位置 -N5~DMRS Ending位置 It becomes -1}.

[0085] In at least one selectable embodiment of the present application, if the symbol position or start symbol position of the SL-PRS determined by the first terminal according to any of 1) to 6) above coincides with the DMRS symbol position, the SL-PRS is transmitted at a symbol later than the DMRS. In addition, the start symbol of the SL-PRS may be transmitted at a symbol one position later than the DMRS.

[0086] In at least one embodiment of the present application, the starting symbol of the scheduled PSSCH resource occupied by the SL-PRS is a selectable symbol associated with 5) the pattern of the DMRS and the number of symbols occupied by the PSSCH, As a selectable embodiment, the symbol position of the SL-PRS associated with the DMRS pattern is at least one of the following:

[0087] If PSSCH=6 symbols, the selectable SL-PRS symbol positions are at least one of {4,6,7,8,9} or at least N (where N is the symbol length of the SL-PRS).

[0088] If PSSCH = 7 to 8 symbols, the selectable SL-PRS symbol positions are at least one of {[3], 4, 6, 7, 8, 9} or at least N (where N is the symbol length of the SL-PRS).

[0089] If PSSCH = 9 to 10 symbols, the selectable SL-PRS symbol positions are at least one or at least N (where N is the symbol length of the SL-PRS): {4,5,6,7,9,10,11,12}, corresponds to the case where DMRS is two symbols and symbol positions are {3,8}. Alternatively, {5,6,8,9,10,11,12}, this corresponds to the case where DMRS is two symbols and the symbol positions are {4,8}. Alternatively, {5,6,7,9,10,11,12}, this corresponds to the case where DMRS is two symbols and the symbol positions are {1,4,7}.

[0090] If PSSCH = 11 to 12 symbols, the selectable SL-PRS symbol positions are at least one or at least N (where N is the symbol length of the SL-PRS): {4,5,6,7,8,9,11,12}, corresponds to the case where DMRS is two symbols and symbol positions {3,10}. Alternatively, {5,6,7,8,9,11,12}, this corresponds to the case where DMRS is two symbols and the symbol positions are {4,10}. Alternatively, this corresponds to {[3], 4,6,7,8,10,11,12}, where DMRS is three symbols and the symbol positions are {1,5,9}. Alternatively, {5,6,8,9,11,12}, and DMRS correspond to the case where there are four symbols and the symbol positions are {1,4,7,10}.

[0091] If PSSCH = 13 symbols, the selectable SL-PRS symbol positions are at least one or at least N (where N is the symbol length of the SL-PRS): {4,5,6,7,8,9,11,12}, corresponds to the case where DMRS is two symbols and symbol positions {3,10}. Alternatively, {4,5,7,8,9,10,12}, or the case where DMRS has three symbols and the symbol positions are {1,6,11}. Alternatively, this corresponds to the case where {3,5,6,8,9,11,12}, or when DMRS has four symbols and the symbol positions are {1,4,7,10}. Alternatively, {5,6,8,9,11,12}, this corresponds to the case where DMRS is two symbols and the symbol positions are {4,10}.

[0092] In another possible embodiment, the starting symbol position of the SL-PRS associated with the DMRS pattern is at least one of {4, 5, 6, 7, 8, 9, 10, 11}, and furthermore, the starting symbol position of the SL-PRS is associated with the following information:

[0093] If PSSCH=6 symbols, the selectable SL-PRS symbol start position is {6}.

[0094] If PSSCH=7 to 8 symbols, the selectable SL-PRS symbol starting position is {6}.

[0095] If PSSCH=9 to 10 symbols, the selectable SL-PRS symbol starting positions are as follows: {4,9} corresponds to the case where DMRS is two symbols and symbol position {3,8}. Alternatively, {5,9}, this corresponds to the case where DMRS is two symbols and the symbol positions are {4,8}. Alternatively, {5,9}, this corresponds to the case where DMRS is two symbols and the symbol positions are {1,4,7}.

[0096] If PSSCH=11-12 symbols, the selectable SL-PRS symbol starting positions are as follows: {4,11} corresponds to the case where DMRS is two symbols and symbol position {3,10}. Alternatively, {5,11}, this corresponds to the case where DMRS is two symbols and the symbol positions are {4,10}. Alternatively, {6,10}, this corresponds to the case where DMRS has three symbols and the symbol positions are {1,5,9}. Alternatively, {5,11}, this corresponds to the case where DMRS has four symbols and the symbol positions are {1,4,7,10}.

[0097] If PSSCH=13 symbols, the selectable SL-PRS symbol starting positions are as follows: {4,11} corresponds to the case where DMRS is two symbols and symbol position {3,10}. Alternatively, {4,7}, this corresponds to the case where DMRS has three symbols and the symbol positions are {1,6,11}. Alternatively, {5,8}, this corresponds to the case where DMRS has four symbols and the symbol positions are {1,4,7,10}. Alternatively, {5,8,11}, this corresponds to the case where DMRS is two symbols and the symbol positions are {4,10}.

[0098] In at least one embodiment of the present application, the symbol length of the scheduled PSSCH resource occupied by the SL-PRS (for example, the symbol length is 2 or 4) is associated with third information, the third information includes at least one of the following:

[0099] The symbol positions of two adjacent DMRS. For example, the symbol length of the SL-PRS = DMRS Ending-位置 (Last DMRS location)-DMRS Ending-1位置 (This is the second-to-last DMRS position). Also, for example, the symbol length of the SL-PRS = DMRS Ending-位置 (Last DMRS location)-DMRS Ending-1位置 (The second to last DMRS position) is -1.

[0100] Whether or not a PSFCH resource is included in the slot where the SL-PRS is located. If a PSFCH resource is included, the number of selectable SL-PRS symbols is L3 (e.g., 2). If a PSFCH resource is not included, the number of selectable SL-PRS symbols may be larger. Therefore, in the embodiments of this application, a suitable number of symbols may be defined for the cases in which a PSFCH is present and in which a PSFCH is not present.

[0101] The number of symbols in PSSCH.

[0102] DMRS pattern.

[0103] Location of DMRS.

[0104] For example, the symbol length associated with a DMRS pattern is at least one of the following:

[0105] If there are ≤ S1 (for example, {8,9}) symbols, the number of selectable SL-PRS symbols is {2,4}.

[0106] If PSSCH>S1, the number of selectable SL-PRS symbols is {2,4}.

[0107] If S1=2, then if the number of symbols in DMRS is greater than 2, the number of symbols in SL-PRS will be 2. If the number of symbols in DMRS is ≤ 2, then the number of symbols in SL-PRS will be {2,4}.

[0108] Figures 9 and 10 are some examples of cases where the number of symbols in the SL-PRS is 4, and the drawings may be optionally extended according to the selectable symbol positions of the SL-PRS in the above embodiment so that they can be applied to any symbol position.

[0109] Figures 11 to 16 are some examples of cases where the number of symbols in the SL-PRS is 2, and the drawings may be optionally extended according to the selectable symbol positions of the SL-PRS in the above embodiment so that they can be applied to any symbol position.

[0110] In another selectable embodiment of the present application, the method is: The first terminal determines the SL-PRS pattern based on the correspondence between the DMRS pattern and the SL-PRS pattern. Or, The first terminal determines the SL-PRS pattern based on the PSSCH DMRS pattern or fourth information, Or, The first terminal further includes the step of determining the SL-PRS pattern based on the correspondence between the DMRS pattern and the SL-PRS pattern, and the DMRS pattern of the PSSCH. The aforementioned correspondence is predefined, and the fourth information is PSCCH symbol length {2,3} PSSCH start symbol {2,4,5}, PSSCH symbol lengths {6, 7, 8, 9, 10, 11, 12, 13}, The system includes at least one of the following: whether or not a PSFCH resource is included in the slot where the SL-PRS is located.

[0111] In one embodiment, one or more DMRS parts among M or fewer DMRS patterns are associated with an SL-PRS, and the SL-PRS is determined based on the indicated DMRS pattern and the SL-PRS associated with the DMRS pattern.

[0112] In another embodiment, one or more DMRS parts among M or fewer DMRS patterns are associated with the SL-PRS, and a portion of the SL-PRS information (i.e., fourth information) is included in the scheduling information or resource pool configuration information, thereby determining the SL-PRS.

[0113] Selectively, the SL-PRS information includes at least one of the following: the number of SL-PRS symbols, the comb value, the SL-PRS pattern, and the SL-PRS start symbol.

[0114] Selectively, the SL-PRS information includes at least one of the following: frequency domain information, such as the bandwidth of the SL-PRS, and the relationship between the SL-PRS and the PSSCH.

[0115] In another selectable embodiment of the present application, the method is: The first terminal further includes the step of determining whether a PSFCH resource is included in the slot where the SL-PRS is located, and determining the pattern of the SL-PRS based on the fifth information, wherein the fifth information is PSCCH symbol length {2,3} PSSCH start symbol {2,4,5}, PSSCH symbol lengths {6, 7, 8, 9, 10, 11, 12, 13}, It includes at least one of the DMRS patterns.

[0116] Based on the above embodiment, two SL-PRS predefined modes or patterns are available: one in which a PSFCH resource exists, and another in which a PSFCH does not exist.

[0117] As a selectable embodiment, the comb value of the SL-PRS is associated with the sixth information, and the sixth information is SL-PRS symbol length, DMRS patterns, Includes at least one of the symbol lengths of PSSCH.

[0118] For example, the comb value may be equal to the number of symbols in the SL-PRS, or it may be a common divisor of the number of symbols in the SL-PRS.

[0119] If the comb value is a common divisor of the number of symbols in the SL-PRS, then the SL-PRS is partial stagger. If the UE is optional, it reports whether or not it has the capability to support partial stagger.

[0120] For example, Figure 17 shows an example where the comb value is 1, and the drawing may be selectively extended according to the selectable symbol positions of the SL-PRS in the above embodiment so that it can be applied to any symbol position.

[0121] Furthermore, for example, Figure 18 shows an example of SL-PRS mapping when the comb value is 2, and optionally, the triangles and rhombuses in Figure 18 represent different SL-PRS mappings. It can be understood that an SL-PRS is mapped to the triangular position of one UE, and an SL-PRS is mapped to the rhombuse position occupied by another UE. Alternatively, it can be understood that different SL-PRS are mapped from one UE to the triangular or rhombuse position. That is, multiple SL-PRS are mapped to a single symbol, using different resource element (RE) offsets.

[0122] Furthermore, for example, Figure 19 shows an example of SL-PRS mapping when the comb value is 4, and the circular, heart-shaped, star-shaped, and diamond shapes in Figure 19 can be selected to represent different SL-PRS mappings.

[0123] In at least one embodiment of the present application, the TDM modes of the SL-PRS and PSSCH are: Symbol-level TDM, It includes one of the following slot-level TDMs, for example, indicating the TDM mode by a slot that transmits at least SL-PRS or a slot that transmits PSSCH.

[0124] Selectively, the first terminal decides to support either symbol-level TDM or slot-level TDM based on signaling or capability.

[0125] In a possible embodiment, the symbol positions of the PSSCH and SL-PRS that are actually transmitted may differ and be understood as a symbol-level TDM. The PSSCH is positioned before the symbol that SL-PRS is transmitted, and the 2nd SCI and / or PSSCH that are actually transmitted are positioned before the SL-PRS transmission.

[0126] Selectively, the step of the first terminal determining first mapping information based on first information includes the step of determining first mapping information based on scheduling instruction information and preset first information. For example, the first terminal determines the specific mapping of the SL-PRS to the PSSCH by determining the bandwidth and slot position of the SL-PRS based on the SCI and determining the SL-PRS pattern or SL-PRS symbol information based on the preset first information.

[0127] Optionally, the first terminal determines the first mapping information based solely on scheduling instruction information. For example, the first terminal determines the specific mapping of the SL-PRS to the PSSCH by determining the bandwidth, slot position, SL-PRS pattern, or SL-PRS symbol information of the SL-PRS based on the SCI.

[0128] For example, Figures 9 to 16 show typical mapping examples between SL-PRS and scheduled PSSCH resources in the PRS transmission method provided by the embodiment of the present application.

[0129] As described above, in the embodiment of the present invention, the first terminal maps and transmits SL-PRS to the scheduled PSSCH resource based on the determined first mapping information. The corresponding second terminal measures the SL-PRS based on the first mapping information. This makes it possible to meet the demand for positioning for the resource while avoiding interference with the data signal due to positioning.

[0130] As shown in Figure 20, an embodiment of the present application is Step 1501 includes the second terminal measuring the sidelink SL-PRS based on the first mapping information, wherein the first mapping information is for instructing the mapping rules of the SL-PRS to the PSSCH resource, and the first mapping information is Relationship between SL-PRS bandwidth and PSSCH resource bandwidth, Symbol information of PSSCH resources occupied by SL-PRS, The present invention further provides a method for transmitting a positioning reference signal PRS, which includes at least one of the time-division multiplexed TDM modes of SL-PRS and PSSCH.

[0131] Selectively, the PSSCH resources described in the embodiments of the present application are scheduled PSSCH resources, specifically, PSSCH resources are scheduled by scheduling instruction information for scheduling PSSCH. For example, the scheduling instruction information is: Bandwidth of scheduled PSSCH resources, The starting frequency domain position of the scheduled PSSCH resource, It includes at least one slot for scheduling PSSCH.

[0132] In the embodiments of the present invention, PSSCH resources are scheduled by scheduling instruction information as a means for scheduling. For example, the scheduling instruction information is Sidelink Control Information (SCI), and includes 1st SCI or 2nd SCI. Selectively, the scheduled PSSCH resources may occupy 6 to 13 symbols (6 to 13 symbols in one SL slot).

[0133] As an optional embodiment, step 1501 is: The second terminal measures the SL-PRS based on the first mapping information and scheduling instruction information for scheduling the PSSCH. Or, The procedure includes the step of the second terminal measuring the SL-PRS based on the first mapping information and the preset information of the SL-PRS.

[0134] As an example of a selectable embodiment, the PRS transmission method described above is specifically a PRS transmission method between a first terminal and a second terminal, where the first terminal maps the SL-PRS to the scheduled PSSCH resource and transmits it to the second terminal. The first terminal may also be the transmitting terminal, in which case the second terminal may be the receiving terminal. Alternatively, the first terminal may be the scheduling terminal, in which case the second terminal may be the transmitting terminal. Alternatively, the first terminal may be the scheduling terminal, in which case the second terminal may be the receiving terminal. These examples will not be listed individually here.

[0135] Furthermore, in the embodiment of the present invention, the first terminal and the second terminal need to have a consistent understanding of the SL-PRS mapping means to the scheduled PSSCH resource. That is, when the first terminal maps and transmits an SL-PRS to a scheduled PSSCH resource based on the first mapping information, the second terminal can also determine the position of the SL-PRS in the scheduled PSSCH resource based on the first mapping information in order to receive and analyze the PSSCH and SL-PRS in the PSSCH resource.

[0136] In one selectable embodiment, the second terminal, acting as a receiving terminal, measures the SL-PRS based on the first mapping rule.

[0137] In one selectable embodiment, the second terminal, acting as a receiving terminal, measures the SL-PRS based on the first mapping rule and the SL-PRS preset information.

[0138] In one selectable embodiment, the second terminal, acting as a receiving terminal, measures the SL-PRS based on the first mapping rule and the scheduling information of the PSSCH.

[0139] In at least one selectable embodiment of the present application, the method is The process further includes the step of determining whether the second terminal transmits the SL-PRS in the PSSCH resource according to the first mode, the first mode including at least one of the following:

[0140] Scheduling instruction information for scheduling a PSSCH. For example, a scheduling instruction for scheduling a PSSCH is SCI, or 1st SCI, or 2nd SCI. If the scheduling instruction information for scheduling a PSSCH includes multiple PSSCH resources, the specific PSSCH resource to which the SL-PRS is transmitted may be indicated by 2 bits or 3 bits.

[0141] Instructions based on resource pool configuration information. The resource pool configuration information is configured by the network, or instructed by the network, or configured by a terminal, or instructed by a terminal, or instructed by a higher layer. Selectively, the resource pool configuration information may include 1 bit to indicate whether or not the current resource pool is capable of SL-PRS multiplexing. Selectively, the resource pool configuration information may include dedicated resource information available for SL-PRS multiplexing. Selectively, the resource pool configuration information may include SL-PRS priority instruction information that enables SL-PRS multiplexing. Selectively, the resource pool configuration information may include symbol information, maximum resource occupancy, or maximum number of symbols that enable SL-PRS multiplexing.

[0142] The granularity of the resource pool configuration information can be selected as follows: Each resource pool, Quality of Service (QoS) for each service, Each logical channel, Each logical channel group, Each channel busy rate CBR, Includes at least one of the channel occupancy rates (CR) for each channel.

[0143] In other words, the resource pool configuration information described above may be parameters set for each resource pool, or parameters set for each QoS, or parameters set for each logical channel, or parameters set for each logical channel group, or parameters set for each CBR, or parameters set for each CR.

[0144] For example, the resource pool configuration information may include SL-PRS priority instruction information for multiplexing by multiple SL-PRS corresponding to different QoS or different logical channels.

[0145] In another selectable embodiment of the present application, the method is: The second terminal further includes the step of determining the first mapping information based on the first rule and / or first information, and the first information is Number of symbols in PSCCH, Number of symbols in PSSCH, PSSCH start symbol, Pattern of demodulated reference signal DMRS, SL-PRS pattern, SL-PRS start symbol, A combined pattern of SL-PRS and DMRS. Period of the physical side-link feedback channel PSFCH, It includes at least one of the following: SL-PRS and PSSCH TDM configuration information. For example, the TDM configuration information may indicate that SL-PRS and PSSCH are slot-based TDM, or that SL-PRS and PSSCH are symbol-based TDM.

[0146] The first rule is indicated by scheduling instruction information for scheduling PSSCH, or by resource pool configuration information, or is a predefined SL-PRS mapping rule.

[0147] Selectively, the first rule includes the relationship between SL-PRS(pattern, number of symbols, comb, start symbol) and the number of symbols of the PSCCH, or the relationship between SL-PRS(pattern, number of symbols, comb, start symbol) and the number of symbols of the PSSCH / symbol position, or the relationship between SL-PRS(pattern, number of symbols, comb, start symbol) and the DMRS.

[0148] The PSFCH period is selected and indicated by the resource pool configuration information. For example, among the P={0,1,2,4} slots, there are slots where no PSFCH exists. Setting it to 0 indicates that no PSFCH resources exist in that resource pool.

[0149] In at least one embodiment of the present application, the first terminal may determine the first mapping information based solely on the first rule, or it may determine the first mapping information based on both the first rule and the first information. This is not a limiting representation.

[0150] As a selectable embodiment, the relationship between the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource is: The bandwidth of SL-PRS and the bandwidth of PSSCH resources must be the same. Or, This includes the fact that the bandwidth of SL-PRS and the bandwidth of PSSCH resources are different.

[0151] For example, resource pool configuration information or scheduling instruction signaling may indicate whether the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are the same or different. Alternatively, for example, a protocol may predefine or indicate whether the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are the same or different.

[0152] The fact that the bandwidth of the SL-PRS and the bandwidth of the scheduled PSSCH resource are the same can be understood as meaning that the size and location of the bandwidths are the same. For example, the first symbol shown in Figures 3 and 4 is for automatic gain control (AGC), the last symbol is used for GAP, and SCI is for scheduling PSSCH resources. It can also be understood that the SL-PRS is transmitted within the frequency domain range of the PSSCH resource and shares the same bandwidth in the same frequency domain.

[0153] In at least one embodiment of the present application, when the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are different, there are two possible cases: Case 1 is the case where the SL-PRS and the PSSCH that is actually transmitted are time-division multiplexed, as shown in Figures 5 and 6. Case 2 is when the SL-PRS and the PSSCH that is actually transmitted are frequency-division multiplexed, as shown in Figures 7 and 8.

[0154] As a selectable embodiment, in Case 1, when the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are different, and the SL-PRS and PSSCH are time-division multiplexed, the scheduling instruction information or the resource pool setting information further, The bandwidth of the aforementioned SL-PRS, The change in bandwidth of the SL-PRS relative to the bandwidth of the PSSCH resource, for example, the increased bandwidth of the SL-PRS compared to the PSSCH. The starting frequency range position of the SL-PRS, This is used to indicate at least one of the following: the offset information of the SL-PRS start frequency domain position relative to the start frequency domain position of the PSSCH resource.

[0155] For example, the bandwidth of the SL-PRS is indicated by the SCI, or the bandwidth of the SL-PRS is increased compared to that of the PSSCH, and this is indicated by the SCI.

[0156] Furthermore, for example, the starting frequency range position of the SL-PRS is indicated by the SCI, or the starting frequency range position of the SL-PRS, which is offset relative to the PSSCH, is indicated by the SCI.

[0157] If a single selectable SL-PRS bandwidth is predefined or specified in the protocol, it is not necessary to specify the SL-PRS bandwidth during scheduling. Alternatively, if multiple (e.g., N) selectable SL-PRS bandwidths are predefined or specified in the protocol, it is necessary to specify one of the N that will be used during scheduling.

[0158] Selectively, the first rule specifies the bandwidth of the N SL-PRS.

[0159] Selectively, the first rule indicates the relationship between the SL-PRS bandwidth and the PSSCH bandwidth in the aforementioned different cases (for example, in different PSSCH bandwidths).

[0160] Selectively, the first rule specifies how to determine the SL-PRS bandwidth based on the PSSCH bandwidth.

[0161] In another possible embodiment, in case 2, the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are different, and the SL-PRS and PSSCH are frequency-division multiplexed, the scheduling instruction information or the resource pool setting information further Bandwidth allocation information for the PSSCH resources occupied by the aforementioned SL-PRS, The bandwidth of the aforementioned SL-PRS, This is used to indicate at least one of the following: the bandwidth of the SL-PRS relative to the bandwidth of the PSSCH resource.

[0162] Similarly, if one selectable SL-PRS bandwidth is protocol-predefined or predefined, it is not necessary to specify the SL-PRS bandwidth during scheduling. Alternatively, if multiple (e.g., N) selectable SL-PRS bandwidths are protocol-predefined or predefined, it is necessary to specify one of the N to be used during scheduling.

[0163] Selectively, the first rule specifies the FDM modes of the SL-PRS and PSSCH, and selectively, the ratio of SL-PRS in FDM.

[0164] Selectively, the first rule specifies the bandwidth of the N SL-PRS.

[0165] Furthermore, the time-frequency division allocation of the SL-PRS must be determined based on both the "relationship between the bandwidth of the SL-PRS and the bandwidth of the PSSCH resources" and the "symbol information of the PSSCH resources occupied by the SL-PRS."

[0166] In at least one embodiment of the present application, the symbol information of the PSSCH resource occupied by the SL-PRS is, At least one of the following for the PSSCH resource occupied by SL-PRS: symbol position, number of symbols, and starting symbol. A pattern for SL-PRS to indicate at least two of the following: the number of symbols in the PSSCH resource occupied by SL-PRS, the symbol position, the starting symbol, and the comb value of the SL-PRS. It includes at least one of the following.

[0167] In one embodiment, the first rule further defined selectable SL-PRS patterns.

[0168] In one embodiment, the first rule further defines the symbol locations of the PSSCH resources occupied by the selectable SL-PRS. Selectably, it instructs that one symbol location be selected from multiple symbol locations for a single resource pool.

[0169] In one embodiment, the first rule further defines the symbolic locations of PSSCH resources occupied by multiple SL-PRS. Selectively, the symbolic locations of the PSSCH resources occupied by the multiple SL-PRS are determined based on first scheduling information (one of which is indicated by the SCI), or the relationship between the SL-PRS symbolic locations and PSSCH information or DMRS is indicated by the first rule, and the symbolic locations of the SL-PRS can be estimated based on the determined PSSCH information or DMRS.

[0170] At least one of the symbol position, number of symbols, starting symbol, and comb value of the PSSCH resource occupied by the SL-PRS is associated with the second information, and the second information is, The symbol length of the physical sidelink control channel PSCCH, e.g., {2,3}. The start symbol for PSSCH, for example, {2,4,5}. The symbol length of PSSCH, for example, {6, 7, 8, 9, 10, 11, 12, 13}. The pattern of the demodulation reference signal DMRS, for example, the number of symbols occupied by the DMRS, the symbol positions of the DMRS, The system includes at least one of the following: whether or not the slot where the SL-PRS is located contains a physical side-link feedback ChannelPSFCH resource.

[0171] As an optional embodiment, the SL-PRS pattern may be indicated together with the DMRS pattern.

[0172] In another possible embodiment, the correspondence between SL-PRS patterns and DMRS patterns is indicated or predetermined by the protocol.

[0173] The start symbol for the scheduled PSSCH resource occupied by the aforementioned SL-PRS is one of the following:

[0174] 1) The start symbol of PSSCH. For example, if the start symbol of PSSCH and the start symbol of PSCCH are different, the start symbol of SL-PRS may be located at the same position as the start symbol of PSSCH only if the start symbol of PSSCH is not 2.

[0175] 2) The N1th symbol that is later than the PSSCH start symbol. If the start symbol of the scheduled PSSCH resource occupied by the SL-PRS is the N1th symbol that is later than the PSSCH start symbol, the value of N1 is associated with whether or not the PSSCH start symbol and the PSSCH start symbol are the same.

[0176] For example, if the start symbol of PSCCH and the start symbol of PSSCH are the same, i.e., the start symbol of PSSCH is 2, then the start symbol of SL-PRS is located at the start symbol of PSSCH + N1'. Alternatively, it can be understood that the start symbol of SL-PRS is located at the last symbol position of PSCCH + N1.

[0177] Furthermore, for example, if the starting symbols of PSCCH and PSSCH are different, i.e., if the starting symbol of PSSCH is 4 or 5, then the starting symbol of SL-PRS is located at the starting symbol of PSSCH + N1''. It can also be understood that the starting symbol of SL-PRS is located at the last symbol position of PSCCH + N1. The values ​​of N1' and N1'' are different.

[0178] 3) The N2nd symbol of the PSSCH resource. Optionally, the value of N2 may be determined based on the symbol length of the PSSCH. For example, for the symbol lengths {6, 7, 8, 9, 10, 11, 12, 13} of the PSSCH, the value of N2 may not be exactly the same, may be exactly the same, or may be completely different.

[0179] 4) The N3rd symbol after the last symbol of the PSCCH. Optionally, depending on whether the last symbol of the PSCCH is symbol 3 or symbol 4, the specific value of N3 is determined, and the values of N3 may be different.

[0180] 5) Selectable symbols associated with the pattern of DMRS and the number of symbols occupied by the PSSCH.

[0181] 6) The N4th symbol after the DMRS symbol position. Optionally, N4 is 1. Further, optionally, the DMRS symbol position may be the last symbol position or the middle symbol position. For example, in the case of two DMRS symbols, the DMRS symbol position is the corresponding last symbol position. Also, for example, in the case of two or more DMRS symbols, the DMRS symbol position is the corresponding second DMRS symbol position.

[0182] 7) The N5th symbol before the last DMRS symbol position. It may be understood as the N5th symbol before the last DMRS symbol position occupied by the symbol position of the SL-PRS. For example, when there are more than two DMRS symbols and the transmission of the last DMRS symbol is cancelled, the symbol position of the SL-PRS is {DMRS Ending位置 -N5~DMRS Ending位置}. Also, for example, when there are more than two DMRS symbols and the transmission of the last DMRS symbol is not occupied, the symbol position of the SL-PRS is {DMRS Ending位置 -N5~DMRS Ending位置 -1}.

[0183] In at least one selectable embodiment of the present application, if the symbol position or start symbol position of the SL-PRS determined by the first terminal according to any of 1) to 6) above coincides with the DMRS symbol position, the SL-PRS is transmitted at a symbol later than the DMRS. In addition, the start symbol of the SL-PRS may be transmitted at a symbol one position later than the DMRS.

[0184] In at least one embodiment of the present application, the starting symbol of the scheduled PSSCH resource occupied by the SL-PRS is a selectable symbol associated with 5) the pattern of the DMRS and the number of symbols occupied by the PSSCH, The symbol position of SL-PRS associated with a DMRS pattern is at least one of the following:

[0185] If PSSCH=6 symbols, the selectable SL-PRS symbol positions are at least one of {4,6,7,8,9} or at least N (where N is the symbol length of the SL-PRS).

[0186] If PSSCH = 7 to 8 symbols, the selectable SL-PRS symbol positions are at least one of {[3], 4, 6, 7, 8, 9} or at least N (where N is the symbol length of the SL-PRS).

[0187] If PSSCH = 9 to 10 symbols, the selectable SL-PRS symbol positions are at least one or at least N (where N is the symbol length of the SL-PRS): {4,5,6,7,9,10,11,12}, corresponds to the case where DMRS is two symbols and symbol positions are {3,8}. Alternatively, {5,6,8,9,10,11,12}, this corresponds to the case where DMRS is two symbols and the symbol positions are {4,8}. Alternatively, {5,6,7,9,10,11,12}, this corresponds to the case where DMRS is two symbols and the symbol positions are {1,4,7}.

[0188] If PSSCH = 11 to 12 symbols, the selectable SL-PRS symbol positions are at least one or at least N (where N is the symbol length of the SL-PRS): {4,5,6,7,8,9,11,12}, corresponds to the case where DMRS is two symbols and symbol positions {3,10}. Alternatively, {5,6,7,8,9,11,12}, this corresponds to the case where DMRS is two symbols and the symbol positions are {4,10}. Alternatively, {[3], 4,6,7,8,10,11,12}, DMRS{corresponds to the case where there are three symbols and the symbol position is {1,5,9}. Alternatively, {5,6,8,9,11,12}, and DMRS correspond to the case where there are four symbols and the symbol positions are {1,4,7,10}.

[0189] If PSSCH = 13 symbols, the selectable SL-PRS symbol positions are at least one or at least N (where N is the symbol length of the SL-PRS): {4,5,6,7,8,9,11,12}, corresponds to the case where DMRS is two symbols and symbol positions {3,10}. Alternatively, {4,5,7,8,9,10,12}, or the case where DMRS has three symbols and the symbol positions are {1,6,11}. Alternatively, this corresponds to the case where {3,5,6,8,9,11,12}, or when DMRS has four symbols and the symbol positions are {1,4,7,10}. Alternatively, {5,6,8,9,11,12}, this corresponds to the case where DMRS is two symbols and the symbol positions are {4,10}.

[0190] In another selectable embodiment, the starting symbol position of the SL-PRS associated with the DMRS pattern is at least one of {4, 5, 6, 7, 8, 9, 10, 11}, and furthermore, the starting symbol position of the SL-PRS is associated with the following information:

[0191] If PSSCH=6 symbols, the selectable SL-PRS symbol start position is {6}.

[0192] If PSSCH=7 to 8 symbols, the selectable SL-PRS symbol starting position is {6}.

[0193] If PSSCH=9 to 10 symbols, the selectable SL-PRS symbol starting positions are as follows: {4,9} corresponds to the case where DMRS is two symbols and symbol position {3,8}. Alternatively, {5,9}, this corresponds to the case where DMRS is two symbols and the symbol positions are {4,8}. Alternatively, {5,9}, this corresponds to the case where DMRS is two symbols and the symbol positions are {1,4,7}.

[0194] If PSSCH=11-12 symbols, the selectable SL-PRS symbol starting positions are as follows: {4,11} corresponds to the case where DMRS is two symbols and symbol position {3,10}. Alternatively, {511} corresponds to the case where DMRS is two symbols at symbol positions {4,10}. Alternatively, {610} corresponds to the case where DMRS has three symbols and the symbol positions are {1,5,9}. Alternatively, {511} corresponds to the case where DMRS has four symbols and the symbol positions are {1,4,7,10}.

[0195] If PSSCH=13 symbols, the selectable SL-PRS symbol starting positions are as follows: {4,11} corresponds to the case where DMRS is two symbols and symbol position {3,10}. Alternatively, {4,7}, this corresponds to the case where DMRS has three symbols and the symbol positions are {1,6,11}. Alternatively, {5,8}, this corresponds to the case where DMRS has four symbols and the symbol positions are {1,4,7,10}. Alternatively, {5,8,11}, this corresponds to the case where DMRS is two symbols and the symbol positions are {4,10}.

[0196] In at least one embodiment of the present application, the symbol length of the scheduled PSSCH resource occupied by the SL-PRS (for example, the symbol length is 2 or 4) is associated with third information, the third information includes at least one of the following:

[0197] The symbol positions of two adjacent DMRS. For example, the symbol length of the SL-PRS = DMRS Ending-位置 (Last DMRS location)-DMRS Ending-1位置 (This is the second-to-last DMRS position). Also, for example, the symbol length of the SL-PRS = DMRS Ending-位置 (Last DMRS location)-DMRS Ending-1位置 (The second to last DMRS position) is -1.

[0198] Whether or not a PSFCH resource is included in the slot where the SL-PRS is located. If a PSFCH resource is included, the number of selectable SL-PRS symbols is L3 (e.g., 2). If a PSFCH resource is not included, the number of selectable SL-PRS symbols may be larger. Therefore, in the embodiments of this application, a suitable number of symbols may be defined for the cases in which a PSFCH is present and in which a PSFCH is not present.

[0199] The number of symbols in PSSCH.

[0200] DMRS pattern.

[0201] Location of DMRS.

[0202] For example, the symbol length associated with a DMRS pattern is at least one of the following:

[0203] If there are ≤ S1 (for example, {8,9}) symbols, the number of selectable SL-PRS symbols is {2,4}.

[0204] If PSSCH>S1, the number of selectable SL-PRS symbols is {2,4}.

[0205] If S1=2, then if the number of symbols in DMRS is greater than 2, the number of symbols in SL-PRS will be 2. If the number of symbols in DMRS is ≤ 2, then the number of symbols in SL-PRS will be {2,4}.

[0206] Figures 9 and 10 are some examples of cases where the number of symbols in the SL-PRS is 4, and the drawings may be optionally extended according to the selectable symbol positions of the SL-PRS in the above embodiment so that they can be applied to any symbol position.

[0207] Figures 11 to 16 are some examples of cases where the number of symbols in the SL-PRS is 2, and the drawings may be optionally extended according to the selectable symbol positions of the SL-PRS in the above embodiment so that they can be applied to any symbol position.

[0208] In another selectable embodiment of the present application, the method is: The second terminal determines the SL-PRS pattern based on the correspondence between the DMRS pattern and the SL-PRS pattern. Or, The second terminal determines the SL-PRS pattern based on the PSSCH DMRS pattern or fourth information, Or, The second terminal further includes the step of determining the SL-PRS pattern based on the correspondence between the DMRS pattern and the SL-PRS pattern, and the DMRS pattern of the PSSCH. The aforementioned correspondence is predefined, and the fourth information is PSCCH symbol length {2,3} The starting symbol {2, 4, 5} of PSSCH, The symbol length {6, 7, 8, 9, 10, 11, 12, 13} of PSSCH, It includes at least one of whether PSFCH resources are included in the slot where the SL-PRS is located.

[0209] In one embodiment, one or more of the M or fewer DMRS patterns are associated with the SL-PRS, and the SL-PRS is determined based on the indicated DMRS pattern and the SL-PRS associated with the DMRS pattern.

[0210] In another embodiment, one or more of the M or fewer DMRS patterns are associated with the SL-PRS, and a part of the SL-PRS information (i.e., the fourth information) is included in the scheduling information or the resource pool setting information, whereby the SL-PRS is determined.

[0211] Optionally, the SL-PRS information includes at least one of the number of symbols of the SL-PRS, the comb value, the SL-PRS pattern, and the starting symbol of the SL-PRS.

[0212] Optionally, the SL-PRS information includes at least one of frequency domain information, for example, the bandwidth of the SL-PRS and the relationship between the SL-PRS and PSSCH.

[0213] In another selectable embodiment of the present application, the method further includes the step of determining the pattern of the SL-PRS based on whether PSFCH resources are included in the slot where the SL-PRS is located by the second terminal and the fifth information, and the fifth information is The symbol length {2, 3} of PSCCH, The starting symbol {2, 5} of PSSCH, The symbol length {6, 7, 8, 9, 10, 11, 12, 13} of PSSCH, It includes at least one of the DMRS patterns.

[0214] Based on the above embodiment, two SL-PRS predefined modes or patterns are available: one in which a PSFCH resource exists, and another in which a PSFCH does not exist.

[0215] As a selectable embodiment, the comb value of the SL-PRS is associated with the sixth information, and the sixth information is SL-PRS symbol length, DMRS patterns, Includes at least one of the symbol lengths of PSSCH.

[0216] For example, the comb value may be equal to the number of symbols in the SL-PRS, or it may be a common divisor of the number of symbols in the SL-PRS.

[0217] If the comb value is a common divisor of the number of symbols in the SL-PRS, then the SL-PRS is partial stagger. If the UE is optional, it reports whether or not it has the capability to support partial stagger.

[0218] In at least one embodiment of the present application, the TDM modes of the SL-PRS and PSSCH are: Symbol-level TDM, This includes any one of the following: slot-level TDM. For example, the TDM mode is indicated by a slot that transmits at least SL-PRS or a slot that transmits PSSCH.

[0219] Selectively, the first terminal decides to support either symbol-level TDM or slot-level TDM based on signaling or capability.

[0220] In a possible embodiment, the symbol positions of the PSSCH and SL-PRS that are actually transmitted may differ and be understood as a symbol-level TDM. The PSSCH is positioned before the symbol that SL-PRS is transmitted, and the 2nd SCI and / or PSSCH that are actually transmitted are positioned before the SL-PRS transmission.

[0221] Selectively, the step of the first terminal determining first mapping information based on first information includes the step of determining first mapping information based on scheduling instruction information and preset first information. For example, the first terminal determines the specific mapping of the SL-PRS to the PSSCH by determining the bandwidth and slot position of the SL-PRS based on the SCI and determining the SL-PRS pattern or SL-PRS symbol information based on the preset first information.

[0222] Optionally, the first terminal determines the first mapping information based solely on scheduling instruction information. For example, the first terminal determines the specific mapping of the SL-PRS to the PSSCH by determining the bandwidth, slot position, SL-PRS pattern, or SL-PRS symbol information of the SL-PRS based on the SCI.

[0223] As described above, in the embodiment of the present invention, the first terminal maps and transmits SL-PRS to the scheduled PSSCH resource based on the determined first mapping information. The corresponding second terminal measures the SL-PRS based on the first mapping information. This makes it possible to meet the demand for positioning for the resource while avoiding interference with the data signal due to positioning.

[0224] The PRS transmission method provided by the embodiments of this application may be implemented by a PRS transmission device. In the embodiments of this application, the PRS transmission device provided by the embodiments of this application will be described as an example in which the PRS transmission method is implemented by a PRS transmission device.

[0225] As shown in FIG. 21, the embodiment of the present application includes a transmission module 1601 for mapping and transmitting a sidelink SL-PRS to a physical sidelink shared channel PSSCH resource based on first mapping information, where the first mapping information includes at least one of a relationship between the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource, symbol information of the PSSCH resource occupied by the SL-PRS, and further provides a transmission device 1600 of a positioning reference signal PRS including at least one of a time division multiplexing TDM mode of the SL-PRS and the PSSCH.

[0226] As a selectable embodiment, the device further includes a first determination module for determining whether to transmit the SL-PRS in the PSSCH resource according to a first mode, where the first mode includes at least one of an indication by scheduling indication information for scheduling the PSSCH, and an indication by resource pool setting information. The resource pool setting information is set by the network, or indicated by the network, or set by the terminal, or indicated by the terminal, or indicated by a higher layer

[0227] As a selectable embodiment, the device further includes a second determination module for determining the first mapping information based on a first rule and / or first information, where the first information includes the number of symbols of the PSCCH, the number of symbols of the PSSCH, the start symbol of the PSSCH, the pattern of the demodulation reference signal DMRS, the pattern of the SL-PRS, the start symbol of the SL-PRS, the composite pattern of the SL-PRS and the DMRS, Period of the physical side-link feedback channel PSFCH, Includes at least one of the following: SL-PRS and PSSCH TDM configuration information, The first rule is indicated by scheduling instruction information for scheduling PSSCH, or by resource pool configuration information, or is a predefined SL-PRS mapping rule.

[0228] As a selectable embodiment, the relationship between the bandwidth of the SL-PRS and the bandwidth of the scheduled PSSCH resource is: The bandwidth of SL-PRS and the bandwidth of PSSCH resources must be the same. Or, This includes the fact that the bandwidth of SL-PRS and the bandwidth of PSSCH resources are different.

[0229] As a selectable embodiment, when the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are different, and the SL-PRS and PSSCH are time-division multiplexed, the scheduling instruction information or the resource pool setting information further includes: The bandwidth of the aforementioned SL-PRS, The bandwidth of the SL-PRS relative to the bandwidth of the PSSCH resource, The starting frequency range position of the SL-PRS, This is used to indicate at least one of the following: the offset information of the SL-PRS start frequency domain position relative to the start frequency domain position of the PSSCH resource.

[0230] As a selectable embodiment, when the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are different, and the SL-PRS and PSSCH are frequency-division multiplexed, the scheduling instruction information or the resource pool setting information further includes: Bandwidth allocation information for the PSSCH resources occupied by the aforementioned SL-PRS, The bandwidth of the aforementioned SL-PRS, This is used to indicate at least one of the following: the bandwidth of the SL-PRS relative to the bandwidth of the PSSCH resource.

[0231] As a selectable embodiment, the apparatus is The system further includes a matching or puncturing module for performing rate matching or puncturing on the SL data channel or SL signal in the PSSCH resource.

[0232] As a selectable embodiment, the apparatus is The system further includes a third determination module for determining the gap between the SL-PRS and the SL channel based on predefined settings, network settings, or terminal settings.

[0233] As a selectable embodiment, the symbol information of the scheduled PSSCH resource occupied by the SL-PRS is: At least one of the following for the scheduled PSSCH resource occupied by SL-PRS: symbol position, number of symbols, and starting symbol. A pattern for SL-PRS to indicate at least two of the following: the number of symbols in the PSSCH resource occupied by SL-PRS, the symbol position, the starting symbol, and the comb value of the SL-PRS. It includes at least one of the following.

[0234] As an optional embodiment, at least one of the symbol position, number of symbols, starting symbol, and comb value of the PSSCH resource occupied by the SL-PRS is associated with second information, and the second information is Symbol length of the physical side link control channel PSCCH, PSSCH start symbol, PSSCH symbol length, Pattern of demodulated reference signal DMRS, The system includes at least one of the following: whether or not the slot where the SL-PRS is located contains a physical side-link feedback ChannelPSFCH resource.

[0235] As a selectable embodiment, the symbol position of the PSSCH resource occupied by the SL-PRS is: The start symbol for the scheduled PSSCH resource occupied by SL-PRS, The symbol length of the scheduled PSSCH resource occupied by SL-PRS includes at least one of the following:

[0236] As a selectable embodiment, the start symbol of the scheduled PSSCH resource occupied by the SL-PRS is: PSSCH start symbol, The N1th symbol after the start symbol of PSSCH, The N2nd symbol of the PSSCH resource, The N3rd symbol after the last symbol of PSCCH, Selectable symbols associated with the DMRS pattern and the number of symbols occupied by PSSCH, The N4th symbol after the DMRS symbol position, It is one of the N5 symbols that precedes the last DMRS symbol position.

[0237] As a selectable embodiment, if the starting symbol of the PSSCH resource occupied by the SL-PRS is the N1th symbol that is later than the starting symbol of the PSSCH, then the value of N1 is: This is associated with whether the start symbol of PSCCH and the start symbol of PSSCH are the same or not.

[0238] As a selectable embodiment, the symbol length of the PSSCH resource occupied by the SL-PRS is associated with third information, and the third information is The symbol positions of two adjacent DMRSs, Whether or not the slot where the SL-PRS is located contains a PSFCH resource, Number of symbols in PSSCH, DMRS patterns, Includes at least one of the following: DMRS locations.

[0239] As a selectable embodiment, the apparatus is Based on the correspondence between the DMRS pattern and the SL-PRS pattern, the SL-PRS pattern is determined. Alternatively, the SL-PRS pattern is determined based on the PSSCH DMRS pattern or the fourth information. Alternatively, the system may further include a fourth determination module for determining the SL-PRS pattern based on the correspondence between the DMRS pattern and the SL-PRS pattern, and the DMRS pattern of the PSSCH. The aforementioned correspondence is predefined, and the fourth information is PSCCH symbol length, PSSCH start symbol, PSSCH symbol length, The system includes at least one of the following: whether or not a PSFCH resource is included in the slot where the SL-PRS is located.

[0240] As a selectable embodiment, the apparatus is The module further comprises a fifth determination module for determining the pattern of the SL-PRS based on whether or not a PSFCH resource is included in the slot where the SL-PRS is located, and the fifth information, wherein the fifth information is PSCCH symbol length, PSSCH start symbol, PSSCH symbol length, It includes at least one of the DMRS patterns.

[0241] As a selectable embodiment, the comb value of the SL-PRS is associated with the sixth information, and the sixth information is SL-PRS symbol length, DMRS patterns, Includes at least one of the symbol lengths of PSSCH.

[0242] As a selectable embodiment, the TDM mode of the SL-PRS PSSCH is: Symbol-level TDM, Includes one of the following: slot-level TDM.

[0243] As an example of a selectable embodiment, the granularity of the resource pool configuration information is: Each resource pool, Quality of Service (QoS) for each service, Each logical channel, Each logical channel group, Each channel busy rate CBR, Includes at least one of the channel occupancy rates (CR) for each channel.

[0244] In the embodiment of the present invention, the first terminal maps and transmits SL-PRS to the scheduled PSSCH resource based on the determined first mapping information. The corresponding second terminal measures the SL-PRS based on the first mapping information. This makes it possible to meet the demand for positioning for the resource while avoiding interference with the data signal due to positioning.

[0245] Furthermore, the PRS transmission device provided by the embodiment of this application is a transmission device capable of implementing the above-described PRS transmission method, and all embodiments of the above-described PRS transmission method can be applied to this device and achieve the same or similar advantageous effects.

[0246] As shown in Figure 22, an embodiment of the present application is Based on first mapping information, a measurement module 1701 is provided for measuring the sidelink SL-PRS, wherein the first mapping information is for instructing the mapping rules of the SL-PRS to the PSSCH resource, and the first mapping information is Relationship between SL-PRS bandwidth and PSSCH resource bandwidth, Symbol information of PSSCH resources occupied by SL-PRS, The present invention further provides a transmission device 1700 for a positioning reference signal PRS, which includes at least one of the time-division multiplexed TDM modes of SL-PRS and PSSCH.

[0247] As a selectable embodiment, the measurement module is: Based on the first mapping information and scheduling instruction information for scheduling the PSSCH, a first measurement submodule for measuring the SL-PRS, Alternatively, the system may include a second measurement submodule for measuring the SL-PRS based on the first mapping information and the SL-PRS preset information.

[0248] As a selectable embodiment, the apparatus is Depending on the first mode, the system further comprises a tenth decision module for determining whether or not to transmit the SL-PRS in the PSSCH resource, wherein the first mode is Instructions based on scheduling instruction information for scheduling PSSCH. This includes at least one of the following: instructions based on resource pool configuration information. The resource pool configuration information is configured by the network, instructed by the network, configured by a terminal, instructed by a terminal, or instructed by a higher level.

[0249] As a selectable embodiment, the apparatus is The system further comprises an eleventh determination module for determining the first mapping information based on the first rule and / or first information, wherein the first information is Number of symbols in PSCCH, Number of symbols in PSSCH, PSSCH start symbol, Pattern of demodulated reference signal DMRS, SL-PRS pattern, SL-PRS start symbol, A combined pattern of SL-PRS and DMRS. Period of the physical side-link feedback channel PSFCH, Includes at least one of the following: SL-PRS and PSSCH TDM configuration information, The first rule is indicated by scheduling instruction information for scheduling PSSCH, or by resource pool configuration information, or is a predefined SL-PRS mapping rule.

[0250] As a selectable embodiment, the relationship between the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource is: The bandwidth of SL-PRS and the bandwidth of PSSCH resources must be the same. Or, This includes the fact that the bandwidth of SL-PRS and the bandwidth of PSSCH resources are different.

[0251] As a selectable embodiment, when the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are different, and the SL-PRS and PSSCH are time-division multiplexed, the scheduling instruction information or the resource pool setting information further includes: The bandwidth of the aforementioned SL-PRS, The bandwidth of the SL-PRS relative to the bandwidth of the PSSCH resource, The starting frequency range position of the SL-PRS, This is used to indicate at least one of the following: the offset information of the SL-PRS start frequency domain position relative to the start frequency domain position of the PSSCH resource.

[0252] As a selectable embodiment, when the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are different, and the SL-PRS and PSSCH are frequency-division multiplexed, the scheduling instruction information or the resource pool setting information further includes: Bandwidth allocation information for the PSSCH resources occupied by the aforementioned SL-PRS, The bandwidth of the aforementioned SL-PRS, This is used to indicate at least one of the following: the bandwidth of the SL-PRS relative to the bandwidth of the PSSCH resource.

[0253] As a selectable embodiment, the symbol information of the PSSCH resource occupied by the SL-PRS is: At least one of the following for the PSSCH resource occupied by SL-PRS: symbol position, number of symbols, and starting symbol. A pattern for SL-PRS to indicate at least two of the following: the number of symbols in the PSSCH resource occupied by SL-PRS, the symbol position, the starting symbol, and the comb value of the SL-PRS. It includes at least one of the following.

[0254] As an optional embodiment, at least one of the symbol position, number of symbols, starting symbol, and comb value of the PSSCH resource occupied by the SL-PRS is associated with second information, and the second information is Symbol length of the physical side link control channel PSCCH, PSSCH start symbol, PSSCH symbol length, Pattern of demodulated reference signal DMRS, The system includes at least one of the following: whether or not the slot where the SL-PRS is located contains a physical side-link feedback ChannelPSFCH resource.

[0255] As a selectable embodiment, the start symbol of the PSSCH resource occupied by the SL-PRS is: PSSCH start symbol, The N1th symbol after the start symbol of PSSCH, The N2nd symbol of the PSSCH resource, The N3rd symbol after the last symbol of PSCCH, Selectable symbols associated with the DMRS pattern and the number of symbols occupied by PSSCH, The N4th symbol after the DMRS symbol position, It is one of the N5 symbols that precedes the last DMRS symbol position.

[0256] As a selectable embodiment, if the starting symbol of the PSSCH resource occupied by the SL-PRS is the N1th symbol that is later than the starting symbol of the PSSCH, then the value of N1 is: This is associated with whether the start symbol of PSCCH and the start symbol of PSSCH are the same or not.

[0257] As a selectable embodiment, the symbol length of the PSSCH resource occupied by the SL-PRS is associated with third information, and the third information is The symbol positions of two adjacent DMRSs, Whether or not the slot where the SL-PRS is located contains a PSFCH resource, Number of symbols in PSSCH, DMRS patterns, Includes at least one of the following: DMRS locations.

[0258] As a selectable embodiment, the apparatus is Based on the correspondence between the DMRS pattern and the SL-PRS pattern, the SL-PRS pattern is determined. Alternatively, the SL-PRS pattern is determined based on the PSSCH DMRS pattern or the fourth information. Alternatively, the system further comprises a 12th determination module for determining the SL-PRS pattern based on the correspondence between the DMRS pattern and the SL-PRS pattern, and the DMRS pattern of the PSSCH. The aforementioned correspondence is predefined, and the fourth information is PSCCH symbol length, PSSCH start symbol, PSSCH symbol length, The system includes at least one of the following: whether or not a PSFCH resource is included in the slot where the SL-PRS is located.

[0259] As a selectable embodiment, the apparatus is The 13th decision module further comprises whether or not a PSFCH resource is included in the slot where the SL-PRS is located, and a 5th information for determining the pattern of the SL-PRS, wherein the 5th information is PSCCH symbol length, PSSCH start symbol, PSSCH symbol length, It includes at least one of the DMRS patterns.

[0260] As a selectable embodiment, the comb value of the SL-PRS is associated with the sixth information, and the sixth information is SL-PRS symbol length, DMRS patterns, Includes at least one of the symbol lengths of PSSCH.

[0261] As a selectable embodiment, the TDM mode of the SL-PRS PSSCH is: Symbol-level TDM, Includes one of the following: slot-level TDM.

[0262] As an example of a selectable embodiment, the granularity of the resource pool configuration information is: Each resource pool, Quality of Service (QoS) for each service, Each logical channel, Each logical channel group, Each channel busy rate CBR, Includes at least one of the channel occupancy rates (CR) for each channel.

[0263] In the embodiment of the present invention, the first terminal maps and transmits SL-PRS to the scheduled PSSCH resource based on the determined first mapping information. The corresponding second terminal measures the SL-PRS based on the first mapping information. This makes it possible to meet the demand for positioning for the resource while avoiding interference with the data signal due to positioning.

[0264] Furthermore, the PRS transmission device provided by the embodiment of this application is a transmission device capable of implementing the above-described PRS transmission method, and all embodiments of the above-described PRS transmission method can be applied to this device and achieve the same or similar advantageous effects.

[0265] In the embodiments of this application, the PRS transmission device may be an electronic device, such as an electronic device having an operating system, or a component of an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other device. Exemplaryly, a terminal may include, but is not limited to, the types of terminals 11 listed above. Other devices may be a server, network attached storage (NAS), etc., but are not specifically limited in the embodiments of this application.

[0266] The PRS transmission device provided by the embodiment of this application can implement each of the procedures realized by the embodiments of the methods shown in Figures 1 to 20, and can achieve similar technical effects; therefore, to avoid duplication, these procedures will not be repeated here.

[0267] As an option, for example as shown in Figure 23, an embodiment of the present application further provides a terminal 1800. The terminal 1800 includes a processor 1801 and a memory 1802, the memory 1802 storing a program or command executable by the processor 1801, and when the program or command is executed by the processor 1801, each step of the embodiment of the PRS transmission method described above is realized and similar technical effects are achieved, so to avoid duplication, it will not be repeated here.

[0268] Embodiments of the present invention further provide a terminal comprising a processor and a communication interface, wherein the processor maps and transmits sidelink SL-PRS to a physical sidelink shared channel PSSCH resource based on first mapping information, the first mapping information includes at least one of the following: the relationship between the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource, symbolic information of the PSSCH resource occupied by the SL-PRS, and the time-division multiplexing TDM mode of the SL-PRS and PSSCH. Alternatively, embodiments of the present invention provide a terminal comprising a processor and a communication interface, wherein the processor measures sidelink SL-PRS based on first mapping information, the first mapping information indicates the mapping rule of SL-PRS to the PSSCH resource, the first mapping information includes at least one of the following: the relationship between the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource, symbolic information of the PSSCH resource occupied by the SL-PRS, and the time-division multiplexing TDM mode of the SL-PRS and PSSCH. The embodiment of the terminal corresponds to the embodiment of the terminal-side method described above, and each implementation procedure and means of the embodiment of the method described above is applicable to the embodiment of the terminal, and similar technical effects can be achieved. Figure 24 is a schematic diagram of the hardware structure of a terminal for realizing the embodiment of the present application.

[0269] The terminal 1900 includes, but is not limited to, at least some of the following components: a high-frequency unit 1901, a network module 1902, an audio output unit 1903, an input unit 1904, a sensor 1905, a display unit 1906, a user input unit 1907, an interface unit 1908, a memory 1909, and a processor 1910.

[0270] As engineers in this field will know, terminal 1900 may further include a power supply (e.g., a battery) to power each component. The power supply is logically connected to processor 1910 by a power management system, which then implements functions such as charge / discharge management and power consumption management. The terminal structure shown in Figure 5 is not intended to limit the terminal, and the terminal may include more or fewer components than shown, or combinations of some components, or different component configurations, which will not be repeated here.

[0271] In the embodiments of this application, the input unit 1904 may include a graphics processing unit (GPU) 19041 that processes static image or video image data acquired by an image capture device (e.g., a camera) in video capture mode or image capture mode, and a microphone 19042. The display unit 1906 may include a display panel 19061, which may be set as a liquid crystal display, an organic light-emitting diode, etc. The user input unit 1907 includes a touch panel 19071 and other input devices 19072. The touch panel 19071 is also called a touchscreen. The touch panel 19071 may include two parts: a touch detection device and a touch controller. The other input devices 19072 may include, but are not limited to, a physical keyboard, function buttons (e.g., volume control buttons, switch buttons, etc.), a trackball, a mouse, or an operating lever, and are not repeated here.

[0272] In the embodiments of this application, the high-frequency unit 1901 receives downlink data from network-side equipment and transmits it to the processor 1910 for processing, and also transmits uplink data to network-side equipment. Typically, the high-frequency unit 1901 includes, but is not limited to, an antenna, at least one amplifier, a transmitter / receiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0273] Memory 1909 may be used to store software programs or commands and various data. Memory 1909 may mainly include a first memory area for storing programs or commands and a second memory area for storing data. The first memory area may store an operating system, applications or commands necessary for at least one function (e.g., audio playback function, image playback function, etc.). Memory 1909 may also include volatile memory or non-volatile memory, or it may include both volatile and non-volatile memory. Non-volatile memory may be read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), or flash memory. The volatile memory may be Random Access Memory (RAM), Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate synchronous DRAM (DDRSDRAM), Enhanced synchronous DRAM (ESDRAM), Synch-link DRAM (SLDRAM), or Direct Rambus RAM (DRRAM). The memory 1909 in the embodiments of this application includes, but is not limited to, these and any other suitable memory.

[0274] The processor 1910 may include one or more processing units. Optionally, the processor 1910 can integrate an application processor that primarily processes the operating system, user interface, and applications or commands, and a modem processor such as a baseband processor that primarily processes wireless communication. Of course, the modem processor does not have to be integrated into the processor 1910.

[0275] The processor 1910 is for mapping the sidelink SL-PRS to the scheduling physical sidelink shared channel PSSCH resource based on first mapping information, the high-frequency unit 1901 is for transmitting the mapped SL-PRS and PSSCH, and the first mapping information is, Relationship between SL-PRS bandwidth and the bandwidth of scheduled PSSCH resources. Symbol information of the scheduled PSSCH resources occupied by SL-PRS, It includes at least one of the following: SL-PRS and PSSCH time-division multiplexing TDM modes.

[0276] Alternatively, the processor 1910 measures the sidelink SL-PRS based on first mapping information, the first mapping information is for instructing the mapping rules of the SL-PRS to the PSSCH resource, and the first mapping information is Relationship between SL-PRS bandwidth and PSSCH resource bandwidth, Symbol information of PSSCH resources occupied by SL-PRS, It includes at least one of the following: SL-PRS and PSSCH time-division multiplexing TDM modes.

[0277] In the embodiment of the present invention, the first terminal maps and transmits SL-PRS to the scheduled PSSCH resource based on the determined first mapping information. The corresponding second terminal measures the SL-PRS based on the first mapping information. This makes it possible to meet the demand for positioning for the resource while avoiding interference with the data signal due to positioning.

[0278] Furthermore, the terminal provided by the embodiment of this application is a terminal capable of performing the above-described PRS transmission method, and all embodiments of the above-described PRS transmission method are applicable to the terminal and can achieve the same or similar advantageous effects.

[0279] Embodiments of the present invention further provide a readable storage medium. The readable storage medium stores a program or command, and when executed by the program or command processor, it realizes each step of the embodiment of the method for transmitting the positioning reference signal PRS described above, and achieves similar technical effects; therefore, to avoid duplication, it will not be repeated here.

[0280] The processor is the processor in the terminal according to the above embodiment. The readable storage medium includes computer-readable storage media such as computer read-only memory ROM, random access memory RAM, magnetic disk, optical disk, etc.

[0281] Embodiments of the present invention further provide a chip comprising a coupled processor and a communication interface, the processor executing a program or command to implement each step of the embodiment of the method for transmitting the positioning reference signal PRS described above, and achieving similar technical effects; therefore, to avoid duplication, it will not be repeated here.

[0282] The chip described in the embodiments of this application is also called a system-on-a-chip, system chip, chip system, or SoC, etc.

[0283] Embodiments of the present invention further provide a computer program / program product. The computer program / program product is stored in a storage medium, and by executing the computer program / program product by at least one processor, each step of the embodiment of the method for transmitting the positioning reference signal PRS described above can be realized and similar technical effects can be achieved; therefore, to avoid duplication, it will not be repeated here.

[0284] In this specification, the terms “including,” “consisting of,” and any other variations thereof are intended to include non-exclusive inclusion, so that a process, method, article, or apparatus containing a set of elements includes not only those elements but also other elements not explicitly stated, or elements specific to such process, method, article, or apparatus. Unless otherwise specified, an element limited by the phrase “including one…” does not preclude the existence of other identical elements in a process, method, article, or apparatus containing that element. Furthermore, the scope of the methods and apparatus in embodiments of this application is not limited to performing functions in the order shown or discussed herein, but may further include performing functions almost simultaneously or in the opposite order, depending on the relevant function. For example, the above methods may be performed in an order different from the order described, and each step may be added, omitted, or combined. Also, features described with reference to some examples may be combined with other examples.

[0285] As will be clearly understood by those skilled in the art from the above description of the embodiments, the methods of the above embodiments can be implemented in the form of a combination of software and a necessary common hardware platform. Of course, they may also be implemented by hardware, but in many cases the former is a more preferred embodiment. Based on this view, the technical means of the present application can be implemented substantially, or in part with respect to the prior art, as a software product, the computer software product stored on a storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and including a plurality of commands that cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the method of each embodiment of the present application.

[0286] Although embodiments of this application have been described above with reference to the drawings, this application is not limited to the above-described specific embodiments. The above-described specific embodiments are merely illustrative and not limiting. Many forms that a person skilled in the art can obtain based on the suggestions of this application without departing from the spirit of this application and the scope of protection of the claims are all within the scope of protection of this application.

Claims

1. A method for transmitting a positioning reference signal PRS, The first terminal includes the step of mapping and transmitting a sidelink SL-PRS to a physical sidelink shared channel PSSCH resource based on first mapping information, wherein the first mapping information is Relationship between SL-PRS bandwidth and PSSCH resource bandwidth, Symbol information of PSSCH resources occupied by SL-PRS, The time-division multiplexing TDM mode includes at least one of SL-PRS and PSSCH, The aforementioned transmission method is The first terminal further includes the step of determining the first mapping information based on the first rule and the first information, and the first information is Number of symbols in PSCCH, Pattern of demodulation reference signal DMRS, SL-PRS pattern, Preset information for the SL-PRS, which includes at least one of the number of symbols and comb value of the SL-PRS, The first rule is a predefined SL-PRS mapping rule, The first rule indicates the relationship between the symbol position of the SL-PRS and the PSSCH information or DMRS, or the first rule includes the relationship between the start symbol of the SL-PRS and the DMRS. A method for transmitting the positioning reference signal (PRS).

2. The first terminal further includes the step of determining whether or not to transmit the SL-PRS in the PSSCH resource according to the first mode, and the first mode is Instructions based on scheduling instruction information for scheduling PSSCH. The transmission method according to claim 1, comprising at least one of the following: instructions based on resource pool configuration information, wherein the resource pool configuration information is set by a network, instructed by a network, set by a terminal, instructed by a terminal, or instructed by a higher layer.

3. The relationship between the bandwidth of the SL-PRS and the bandwidth of the PSSCH resources is as follows: The transmission method according to claim 2, further comprising the fact that the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource are the same.

4. The symbol information for the PSSCH resources occupied by SL-PRS is: At least one of the following for the PSSCH resource occupied by SL-PRS: symbol position, number of symbols, and starting symbol. The transmission method according to claim 1, comprising at least one of the following: the number of symbols of the PSSCH resource occupied by the SL-PRS, the symbol position, and a pattern of the SL-PRS for indicating at least two of the comb value of the SL-PRS.

5. At least one of the symbol position, number of symbols, starting symbol, and comb value of the PSSCH resource occupied by the SL-PRS is associated with second information, and the second information is, PSSCH start symbol, PSSCH symbol length, The transmission method according to claim 4, comprising at least one of the patterns of demodulated reference signals (DMRS).

6. The start symbol for the PSSCH resource occupied by the aforementioned SL-PRS is: Selectable symbols associated with the DMRS pattern and the number of symbols occupied by PSSCH, The N4th symbol after the DMRS symbol position, where the DMRS symbol position is the last corresponding symbol position. The transmission method according to claim 4, wherein the N5th symbol is one of the symbols that precedes the last DMRS symbol position.

7. If the last DMRS symbol transmission is not occupied, the symbol position for SL-PRS is {DMRS Ｅｎｄｉｎｇ位置 -N5~DMRS Ｅｎｄｉｎｇ位置 The transmission method according to claim 6, which results in -1.

8. The symbol length of the PSSCH resource occupied by the SL-PRS is associated with third information, and the third information is The symbol positions of two adjacent DMRSs, DMRS patterns, The location of the DMRS includes at least one of the following: Or, The first terminal determines the SL-PRS pattern based on the correspondence between the DMRS pattern and the SL-PRS pattern. Or, The first terminal further includes the step of determining the SL-PRS pattern based on the PSSCH DMRS pattern or fourth information, The aforementioned correspondence is predefined, and the fourth information is PSSCH start symbol, The transmission method according to claim 4, comprising at least one of the symbol lengths of PSSCH.

9. The comb value of the SL-PRS is associated with the sixth piece of information, and the sixth piece of information is The transmission method according to claim 4, comprising the symbol length of SL-PRS.

10. The TDM modes of the aforementioned SL-PRS and PSSCH are: The transmission method according to claim 1, comprising symbol-level TDM.

11. The granularity of the resource pool configuration information is as follows: Each resource pool, Each channel busy rate CBR, The transmission method according to claim 2, comprising at least one of the channel occupancy rates CR.

12. The transmission method according to claim 1, wherein the preset information of the SL-PRS further includes an SL-PRS pattern.

13. The transmission method according to claim 12, wherein the SL-PRS pattern includes multiple types in the preset information, and the pattern specifically adopted for SL-PRS transmission is determined based on a first rule or SCI scheduling information.

14. The transmission method according to claim 1, wherein the time frequency division allocation of the SL-PRS is determined based on both the relationship between the bandwidth of the SL-PRS and the bandwidth of the PSSCH resource, and the symbol information of the PSSCH resource occupied by the SL-PRS.

15. The transmission method according to claim 1, wherein the symbol positions of the PSSCH and SL-PRS that are actually transmitted are different.

16. The transmission method according to claim 15, wherein the 2nd SCI that is actually transmitted is located before the SL-PRS transmission.

17. A method for transmitting a positioning reference signal PRS, The second terminal includes the step of measuring the sidelink SL-PRS based on the first mapping information, wherein the first mapping information is for instructing the mapping rules for the SL-PRS to the PSSCH resource, and the first mapping information is Relationship between SL-PRS bandwidth and PSSCH resource bandwidth, Symbol information of PSSCH resources occupied by SL-PRS, The time-division multiplexing TDM mode includes at least one of SL-PRS and PSSCH, The aforementioned transmission method is The second terminal further includes the step of determining the first mapping information based on the first rule and the first information, and the first information is Number of symbols in PSCCH, Pattern of demodulation reference signal DMRS, SL-PRS pattern, Preset information for the SL-PRS, which includes at least one of the number of symbols and comb value of the SL-PRS, The first rule is a predefined SL-PRS mapping rule, The first rule indicates the relationship between the symbol position of the SL-PRS and the PSSCH information or DMRS, or the first rule includes the relationship between the start symbol of the SL-PRS and the DMRS. A method for transmitting the positioning reference signal (PRS).

18. The system comprises a processor and memory, wherein the memory stores a program or command that can be executed by the processor, and when the program or command is executed by the processor, Based on the first mapping information, the step of mapping the sidelink SL-PRS to the physical sidelink shared channel PSSCH resource and transmitting it is implemented. The first mapping information is Relationship between SL-PRS bandwidth and PSSCH resource bandwidth, Symbol information of PSSCH resources occupied by SL-PRS, The time-division multiplexing TDM mode includes at least one of SL-PRS and PSSCH, When the program or command is executed by the processor, A further step is performed in which the first mapping information is determined based on the first rule and the first information, Number of symbols in PSCCH, Pattern of demodulation reference signal DMRS, SL-PRS pattern, Preset information for the SL-PRS, which includes at least one of the number of symbols and comb value of the SL-PRS, The first rule is a predefined SL-PRS mapping rule, A terminal in which the first rule specifies the relationship between the symbol position of the SL-PRS and the PSSCH information or DMRS, or the first rule includes the relationship between the start symbol of the SL-PRS and the DMRS.

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