Method and device for transmitting and receiving sidelink positioning reference signal

Abstract

The present disclosure discloses a method and an apparatus for transmitting and receiving a sidelink positioning reference signal. The transmitting method applied to a first terminal includes the steps of obtaining a time-frequency resource configuration parameter of an SL PRS, determining a first resource, and transmitting the SL PRS in the first resource according to the time-frequency resource configuration parameter or transmitting the SL PRS and first indication information, where the first indication information is used to indicate transmission parameter information of the first resource. In the embodiment of the present disclosure, the time-frequency resource configuration parameter of the SL PRS is obtained, and the SL PRS is loaded into the first resource for transmission and reception according to the time-frequency resource configuration parameter, and can be combined with the first indication information, thereby realizing the transmission of the SL PRS when the base station does not participate in scheduling and the structure form of the physical layer channel is different from the conventional uplink and downlink, and facilitating positioning for the sidelink based on the SL PRS.

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202110882902.2, filed in China on August 2, 2021, the entire contents of which are incorporated by reference.

[0002] The present disclosure relates to the field of communications technology, and in particular to a method and apparatus for transmitting and receiving a sidelink positioning reference signal. [Background technology]

[0003] 3GPP (registered trademark) Release 16 (3rd Generation Partnership Project Release 16) is conducting research and standardization on NR Positioning (uplink and downlink of cellular networks). Within the coverage area of ​​a cellular network, a base station transmits a cell-specific downlink positioning reference signal (PRS), and a terminal transmits an uplink measurement signal (SRS) for positioning in the uplink to measure the reference signal time difference (RSTD), or the reference signal received power (RSRP) of the downlink positioning reference signal (DL PRS), or the time difference between the terminal's reception of the DL PRS and the transmission of the SRS. The base station can measure the uplink relative time of arrival (RTOA), the RSRP of the SRS, the time difference between when the 5G base station (gNB) receives the SRS and when the gNB transmits the DL PRS, and angle measurements, etc. The position of the User Equipment (UE) is calculated by processing the measured values.

[0004] Research and standardization work on sidelink positioning is being actively conducted, but since there may not be a scenario in which sidelink is scheduled by gNB, unlike downlink and uplink, in order to accommodate sidelink positioning technology, it is necessary to newly design a corresponding sidelink-PRS based on its own resource selection and physical layer structure characteristics, etc. However, since positioning-related characteristics are not incorporated into Release-16 / 17 sidelink and the physical layer channel structure form of sidelink is completely different from downlink and uplink, the conventional DL PRS and SRS for positioning cannot be directly applied to sidelink. Summary of the Invention [Problem to be solved by the invention]

[0005] The technical objective of the embodiments of the present disclosure is to provide a method and an apparatus for transmitting and receiving a sidelink positioning reference signal, thereby solving the problem that positioning cannot be realized due to the fact that a base station does not participate in scheduling and the structure of a physical layer channel is different from that of a known channel. [Means for solving the problem]

[0006] In order to solve the above technical problems, an embodiment of the present disclosure discloses a sidelink positioning reference signal (SL PRS) transmission method, which is applied to a first terminal, comprising: Obtaining a time-frequency resource configuration parameter of a sidelink positioning reference signal (SL PRS for short); The method includes a step of determining a first resource, and transmitting an SL PRS in the first resource based on a time-frequency resource configuration parameter, or transmitting the SL PRS and first indication information, where the first indication information is used to indicate transmission parameter information of the first resource.

[0007] Another optional embodiment of the present disclosure further discloses a method for receiving a sidelink positioning reference signal (SL PRS), the method being applied to a second terminal, comprising: obtaining time-frequency resource configuration parameters for a SL PRS; The method includes receiving an SL PRS in a first resource based on a time-frequency resource configuration parameter, or receiving an SL PRS and first indication information, where the first indication information is used to indicate transmission parameter information of the first resource.

[0008] Another optional embodiment of the present disclosure further discloses a transmitting device for a sidelink positioning reference signal SL PRS, the transmitting device being applied to a first terminal, comprising: A first processing module configured to obtain a time-frequency resource configuration parameter of the SL PRS; a second processing module configured to determine a first resource and transmit the SL PRS or the SL PRS and the first indication information on the first resource based on a time-frequency resource configuration parameter; The first indication information is used to indicate transmission parameter information of the first resource.

[0009] Another optional embodiment of the present disclosure further discloses a receiving device for a sidelink positioning reference signal SL PRS, the receiving device being applied to a second terminal, A third processing module configured to obtain time-frequency resource configuration parameters of the SL PRS; a fourth processing module configured to determine a first resource and receive the SL PRS or the SL PRS and the first indication information on the first resource based on a time-frequency resource configuration parameter; The first indication information is used to indicate transmission parameter information of the first resource.

[0010] Another alternative embodiment of the present disclosure further discloses a computer-readable storage medium having stored thereon a computer program, which, when executed by a processor, results in the above-mentioned method for transmitting a sidelink positioning reference signal SL PRS applied to a first terminal or the above-mentioned method for receiving a sidelink positioning reference signal SL PRS applied to a second terminal. Effect of the Invention

[0011] Compared with the related art, the sidelink positioning reference signal transmission method, reception method and apparatus according to the embodiments of the present disclosure have at least the following beneficial effects:

[0012] In the embodiment of the present disclosure, a time-frequency resource configuration parameter of the SL PRS is obtained, and the SL PRS is loaded into the first resource according to the time-frequency resource configuration parameter for transmission and reception, and the first indication information is also used, which is advantageous for realizing the transmission of the SL PRS when the base station does not participate in scheduling and the structure of the physical layer channel is different from the conventional uplink and downlink, and facilitates positioning for the sidelink based on the SL PRS. [Brief description of the drawings]

[0013] [Figure 1] 1 is a flowchart of a sidelink positioning reference signal SL PRS transmission method according to the present disclosure; [Diagram 2] FIG. 13 is a schematic diagram of a frequency domain pattern when overlapping mapping is performed; [Diagram 3] FIG. 2 is a schematic diagram illustrating a first preset dedicated resource set configuration; [Figure 4] FIG. 2 is a structural schematic diagram of transmitting PSCCH, PSSCH and SL PRS in the first preset dedicated resource set; [Diagram 5] 1 is a schematic diagram showing multiple user terminals multiplexing in the same first preset dedicated resource set; [Figure 6] 2 is a schematic diagram showing a second example of multiple user terminals multiplexing in the same first preset dedicated resource set; [Figure 7] A schematic diagram showing that the bandwidth of a first frequency domain covers multiple resource pools. [Figure 8] FIG. 2 is a schematic diagram showing mapping only SL PRSs in the first preset dedicated resource set; [Figure 9] 13 is a schematic diagram showing a case in which the SL PRS is not multiplexed with any of the PSCCH, data information Data, and PSSCH DMRS. FIG. [Figure 10] 1 is a schematic diagram showing multiplexed communication of SL PRS and PSSCH DMRS. [Figure 11] 1 is a schematic diagram showing that PSCCH and / or PSSCH are arranged in all of a plurality of resource pools covered by the bandwidth of a first frequency domain. [Figure 12] FIG. 2 is a second schematic diagram showing that PSCCH and / or PSSCH are arranged in any of a plurality of resource pools covered by the bandwidth of the first frequency domain. [Figure 13] 1 is a flowchart of a sidelink positioning reference signal SL PRS reception method according to the present disclosure. [Figure 14] FIG. 2 is a structural schematic diagram of a sidelink positioning reference signal SL PRS transmitting device according to the present disclosure; [Figure 15] FIG. 2 is a structural schematic diagram of a sidelink positioning reference signal SL PRS receiving device according to the present disclosure; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] In order to clarify the technical problems, technical means and advantages that the present disclosure aims to solve, the present disclosure will be described in detail below with reference to the drawings and specific embodiments. The specific arrangement and specific details of components provided in the following description are merely intended to contribute to a full understanding of the embodiments of the present disclosure. Therefore, as will be understood by those skilled in the art, the embodiments described herein can be modified and altered in various ways without departing from the scope and spirit of the present disclosure. In addition, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted.

[0015] It should be noted that, as used throughout the specification, the term "one embodiment" or "one embodiment" means that a particular configuration, structure, or characteristic associated with an embodiment is included in at least one embodiment of the present disclosure. Thus, the appearances of "in one embodiment" or "in one embodiment" in various places throughout the specification do not necessarily refer to the same embodiment. Furthermore, the particular configuration, structure, or characteristic may be incorporated in one or more embodiments in any suitable form.

[0016] In addition, in each embodiment of the present disclosure, the number of each process described below does not indicate the order of execution, and the execution order of each process should be determined based on its function and inherent logic, and should not impose any limitations on the execution process of the embodiments of the present disclosure.

[0017] In addition, the term "and / or" in this text merely describes the related relationship of related objects, and indicates that three types of relationships can exist. For example, A and / or B can represent three types of situations: A only exists, A and B exist simultaneously, and B only exists. In addition, the symbol " / " in this text generally indicates that the related objects before and after it are in an "or" relationship.

[0018] In addition, in the embodiment of the present disclosure, "B corresponding to A" indicates that B is related to A, and B can be determined based on A. However, it should be understood that determining B based on A does not only mean determining B based on A only, but also can determine B based on A and / or other information.

[0019] As shown in Fig. 1, an optional embodiment of the present disclosure provides a sidelink positioning reference signal (SL PRS) transmission method, which is applied to a first terminal, and includes the following contents:

[0020] In step S101, obtain the time-frequency resource configuration parameters of the SL PRS.

[0021] In step S102, a first resource is determined, and an SL PRS is transmitted in the first resource according to a time-frequency resource configuration parameter, or an SL PRS and first indication information are transmitted, where the first indication information is used to indicate transmission parameter information of the first resource.

[0022] In an optional embodiment of the present disclosure, a transmission method for SL PRS applied to a first terminal is disclosed. Specifically, it can obtain resource configuration parameters of SL PRS before transmission, and perform configuration on corresponding resources according to the resource configuration parameters, thereby loading SL PRS on corresponding resources, and transmitting SL PRS to corresponding second terminal when transmitting resources. Furthermore, it determines a first resource used for transmitting SL PRS, so that SL PRS is loaded on the first resource and transmitted, thereby ensuring feasibility of transmitting SL PRS. Here, when transmitting SL PRS on the first resource, only SL PRS may be transmitted, or SL PRS and first indication information indicating transmission parameter information of the first resource may be transmitted. In one specific embodiment, when all time-frequency resource configuration information is jointly determined by the first terminal and the second terminal, positioning for sidelink can be performed by transmitting only SL PRS. If there is information determined only by the first terminal among the time-frequency resource configuration information of the SL PRS, it is necessary to perform positioning for the sidelink by transmitting the SL PRS and first indication information in the first resource, so that the second terminal can accurately grasp all the time-frequency resource configuration information of the SL PRS based on the first indication information, and thus accurate transmission of the SL PRS is ensured.

[0023] To sum up, in the embodiment of the present disclosure, a time-frequency resource configuration parameter of the SL PRS is obtained, and the SL PRS is loaded into the first resource determined in advance and transmitted based on the time-frequency resource configuration parameter, and can also be combined with the first indication information. This is advantageous to realize the transmission of the SL PRS when the base station does not participate in scheduling and the structure of the physical layer channel is different from the conventional uplink and downlink, and facilitates positioning for the sidelink based on the SL PRS.

[0024] Optionally, in the above mentioned method for transmitting a sidelink positioning reference signal (SL PRS), the first resource is determined in at least one kind of resource set: a first preset dedicated resource set and a physical sidelink shared channel (PSSCH) resource set.

[0025] In an optional embodiment of the present disclosure, the first resource may be determined in a single resource set or in multiple resource sets, where the resource set includes but is not limited to a first preset dedicated resource set and a PSSCH resource set, etc. In one specific embodiment, when the first resource is determined jointly by both the first preset dedicated resource set and the PSSCH resource set, the SL PRS may be carried in the resource of the first preset dedicated resource set, and the first indication information may be carried in the resource of the PSSCH resource set.

[0026] Optionally, by configuring the first preset dedicated resource set, it is possible to avoid the impact on conventional terminals and reduce interference with the SL PRS caused by other signals, and further to allocate a larger frequency domain bandwidth for the SL PRS, which is beneficial for ensuring positioning accuracy.

[0027] The resource collection here may be expressed as a resource pool or the like.

[0028] Specifically, in the above-mentioned transmission method of sidelink positioning reference signal SL PRS, the time-frequency resource configuration parameters include at least one of time domain symbol number configuration information of SL PRS, time domain symbol position configuration information of SL PRS, frequency domain pattern configuration information of SL PRS, first frequency domain start PRB configuration information of SL PRS, frequency domain start subchannel configuration information of SL PRS, first frequency domain bandwidth configuration information of SL PRS, first appearance period configuration information of SL PRS, and sequence initialization ID configuration information of SL PRS, where the granularity of the first frequency domain bandwidth is subchannel or PRB.

[0029] In a specific embodiment of the present disclosure, the time-frequency resource configuration parameters of the SL PRS are described by way of example, and when actually configured, the time-frequency resource configuration parameters may include at least one of the above.

[0030] It should be noted that the above-mentioned time-frequency resource configuration parameters can be configured by RRC signaling, can be preset, or can be determined based on the first terminal's own information. If determined based on the first terminal's own information, it is necessary to use the first indication information to provide an indication, so that the receiving side can accurately grasp the SL PRS through the first indication information when receiving the SL PRS.

[0031] In addition, in a specific embodiment of the present disclosure, the frequency domain pattern configuration information of the SL PRS is a comb size, which includes, but is not limited to, the comb size, the resource elements (abbreviated as RE) of each PRB of the start symbol, and the mapping offset of the RE granularity in each symbol. In addition, in the case of overlapping mapping in any symbol, only the RE mapping position in each PRB in the frequency domain is required. Referring to FIG. 2, the diagram on the left is a schematic diagram showing a case where the frequency domain pattern in the diagram on the right is offset. For a user equipment (UE1), the comb size is 4, the resource elements (abbreviated as RE) of the start symbol (1 st The starting mapping RE position (RE0) in a PRB (or RB (Resource Block)) of a 4 symbols is index=0, and the RE mapping offsets in the 4 symbols are {0, 2, 1, 3}.

[0032] In addition, in the bandwidth setting information of the first frequency domain of the SL PRS, the granularity of the bandwidth of the first frequency domain is a subchannel or a PRB. The time-frequency resource setting parameters may include the starting PRB setting information of the first frequency domain of the SL PRS, but may not include the starting subchannel setting information of the frequency domain of the SL PRS. Alternatively, the time-frequency resource setting parameters may include the starting subchannel setting information of the frequency domain of the SL PRS, but may not include the starting PRB setting information of the first frequency domain of the SL PRS.

[0033] Furthermore, in the above-mentioned method for transmitting a sidelink positioning reference signal SL PRS, the first indication information is carried by at least one of sidelink control information (SCI), sidelink positioning information (SPI), a media access control layer control unit (MAC CE), a radio resource control (RRC) signaling, a sidelink data packet, a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), a physical sidelink broadcast channel (PSBCH), a physical sidelink feedback channel (PSFCH), a physical sidelink discover channel (PSDCH) and a physical sidelink positioning channel (PSPCH).

[0034] Here, "SPI" refers to an instruction information type for indicating positioning related information in the side link. However, the name of the instruction information type for indicating positioning related information is not limited to SPI.

[0035] Specifically, in the above-mentioned transmission method of the sidelink positioning reference signal SL PRS, the transmission parameter information includes at least one of the number of time domain symbols of the SL PRS, the time domain symbol position of the SL PRS, the frequency domain pattern of the SL PRS, the first frequency domain start PRB of the SL PRS, the frequency domain start subchannel of the SL PRS, the first frequency domain bandwidth of the SL PRS, the first appearance period of the SL PRS, the sequence initialization ID of the SL PRS, and the SL PRS indicator information.

[0036] It should be noted that, since the first indication information is used to indicate the transmission parameter information of the first resource, the type of the transmission parameter information corresponds to the type of the resource configuration parameter, and the number of types of the transmission parameter information during actual transmission corresponds to the number of types of the resource configuration parameter determined according to the self information of the first terminal, thus ensuring the integrity of the first indication information when it gives an indication.

[0037] Optionally, in the above-mentioned method for transmitting sidelink positioning reference signals SL PRS, when the first resource is determined in a first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include: a symbol position occupied by the first preset dedicated resource set in each slot, a starting PRB in a second frequency domain of the first preset dedicated resource set, a bandwidth in a second frequency domain of the first preset dedicated resource set, a second appearance period of the first preset dedicated resource set, a number of transmissions of the SL PRS in each period, and a number of time domain resources between two adjacent SL PRS in each period.

[0038] Here, the bandwidth occupation pattern of the second frequency domain includes at least one of completely occupying the current resource pool, covering multiple resource pools, completely occupying a partial bandwidth BWP, completely occupying a carrier, and occupying a preset number of PRBs.

[0039] In an alternative embodiment of the present disclosure, when the first resource needs to be determined in the first preset dedicated resource set, the first preset dedicated resource set is configured first, that is, the symbol position in the slot, the starting PRB in the second frequency domain, the bandwidth in the second frequency domain, the second occurrence period, the number of transmissions of the SL PRS in each period, and the number of time domain resources between two adjacent SL PRS in each period are first obtained through RRC signaling configuration or preset configuration. As shown in FIG. 3, where period is the period in which the first preset dedicated resource appears, slot is the slot, PRS is the SL PRS, and BW is the bandwidth. During the above configuration parameters are configured, the structure of the slot will change, which will affect the calculation of the transport block size (abbreviated as TBS) to a certain extent. Therefore, a new information field needs to be incorporated into the first stage SCI, which is used to indicate the number of symbols or detailed overhead occupied by the SL PRS when calculating TBS in the current slot.

[0040] Specifically, this embodiment further describes the occupancy pattern of the bandwidth of the second frequency region by way of example. Here, the bandwidth of the second frequency region can occupy the current resource pool completely, cover multiple resource pools, occupy the partial bandwidth BWP completely, occupy the carrier completely, and / or occupy a preset number of PRBs. In practical application, the bandwidth of the second frequency region can be determined according to the bandwidth actually occupied by the SL PRS.

[0041] Optionally, in the above-mentioned method for transmitting sidelink positioning reference signals SL PRS, when a plurality of first terminals share a first preset dedicated resource set, the method further comprises: The mapping position of the SL PRS and / or the code division multiplexing means used are made to correspond to the user identifier of the first terminal or the second terminal, and the code division multiplexing means is an orthogonal cover code OCC or a cyclic shift code CS; or making the mapping location of the SL PRS and / or the code division multiplexing means used correspond to the resource mapping location of the SL PRS request signaling transmitted by the second terminal; or transmitting the SL PRS and at least one of the PSCCH, PSSCH, and PSPCH in the first preset dedicated resource set; Or, transmitting the SL PRS in a first preset dedicated resource set, and transmitting at least one of the PSCCH, PSSCH, and PSPCH in a remaining resource set in a slot in which the SL PRS is located, or in a first slot that is a preset number of time domain resources away from the first preset dedicated resource set.

[0042] Here, the PSCCH, PSSCH or PSPCH is used to carry user information indicating the first terminal and time-frequency resource information of the SL PRS, and the PSSCH or PSPCH is further used to carry positioning information.

[0043] In another alternative embodiment of the present disclosure, multiple first terminals can be multiplexed by the same dedicated resource in a first preset dedicated resource pool (PRS Dedicated Resource Pool). In this case, resources corresponding to different first terminals can be orthogonalized to ensure positioning accuracy. For example, a correspondence relationship between the mapping position of the SL PRS and / or the code division multiplexing means used and the resource mapping position of the terminal or the SL PRS request signaling is established. Or, in the remaining resource set in the same slot or the first slot separated by the number of preset time domain resources, a PSCCH, a PSSCH and / or a PSPCH carrying user information and time-frequency resource information is transmitted. Here, the PSSCH or the PSPCH is further used to carry positioning information (as shown in FIG. 4). Through the above operations, resources occupied by multiple user terminals can be orthogonalized (as shown in FIG. 5). Here, the user information includes, but is not limited to, the source ID of the user terminal.

[0044] The above-mentioned code division multiplexing means is an orthogonal cover code OCC or a cyclic shift code CS, which is related to the sequence type adopted by the SL PRS. Here, when the Gold sequence is adopted, the code division multiplexing means is OCC, and when the ZC sequence is adopted, the code division multiplexing means is CS.

[0045] Specifically, as shown in FIG. 6, the PSCCH, PSSCH, and PSPCH can be carried in the first preset dedicated resource set, the remaining resources in the slot in which the SL PRS is located, or in the first slot that is a preset number of time domain resources away from the first preset dedicated resource set.

[0046] Specifically, in the above-mentioned method for transmitting a sidelink positioning reference signal (SL PRS), when the first resource is determined in a sidelink shared channel (PSSCH) resource set, the bandwidth of the first frequency domain of the SL PRS satisfies at least one of the following requirements: the bandwidth of the first frequency domain is the same as the bandwidth of the third frequency domain of the PSSCH resource set; the bandwidth of the first frequency domain completely occupies a current resource pool; the bandwidth of the first frequency domain covers multiple resource pools; the bandwidth of the first frequency domain completely occupies a BWP; and the bandwidth of the first frequency domain completely occupies a carrier wave.

[0047] In another optional embodiment of the present disclosure, when the first resource is determined in the PSSCH resource set, the bandwidth of the first frequency region of the SL PRS is limited, where the bandwidth of the first frequency region can be selected from the following as necessary: ​​the same as the bandwidth of the third frequency region of the PSSCH resource set, completely occupying the current resource pool, covering multiple resource pools, completely occupying the BWP, or completely occupying a carrier, thereby meeting the transmission needs and contributing to reducing resource waste. When the bandwidth of the first frequency region completely occupies the current resource pool, covers multiple resource pools, completely occupies the BWP, or completely occupies a carrier (as shown in FIG. 7, where the bandwidth of the first frequency region in FIG. 7 covers multiple resource pools, GP is guard period, and AGC is automatic gain control), the bandwidth occupied by the SL-PRS is not limited, so that the positioning accuracy can be guaranteed to a certain extent.

[0048] Optionally, in the above-mentioned method for transmitting a sidelink positioning reference signal SL PRS, only the SL PRS is transmitted in the first resource, or the SL PRS and the physical sidelink PRS are transmitted in the first resource. shareAt least one of a demodulation reference signal PSSCH DMRS for the channel, a first SCI for instructing decoding of the PSSCH, a second SCI for instructing the SL PRS transmission parameters and / or positioning information, dedicated information for instructing the SL PRS transmission parameters and / or positioning information, a MAC CE for instructing the SL PRS transmission parameters and / or positioning information, RRC signaling for instructing the SL PRS transmission parameters and / or positioning information, and data information capable of indicating positioning information is transmitted.

[0049] Alternatively, when the first resource is determined in the PSSCH resource set, the first resource transmits the SL PRS and simultaneously transmits other information related thereto, such as at least one of the following: PSSCH DMRS, a first SCI for indicating PSSCH decoding, a second SCI for indicating SL PRS transmission parameters and / or positioning information, dedicated information, MAC CE and / or RRC signaling, data information for indicating positioning information, etc., so that the second terminal receiving the first resource can accurately determine the location and positioning information of the SL PRS.

[0050] In addition, the above-mentioned first SCI, second SCI and dedicated information are at least one of a first stage SCI, a second stage SCI, or a third stage SCI for exclusively indicating parameters and / or positioning information.

[0051] Optionally, in the above-mentioned method for transmitting a sidelink positioning reference signal SL PRS, the mapping rule for the SL PRS in the first resource includes at least one of: mapping only the SL PRS to an OFDM symbol carrying the SL PRS; not mapping the SL PRS to an OFDM symbol including a first signal, the first signal including some or all of the first SCI, the PSSCH DMRS, the channel state information reference signal CSI RS, and the phase tracking reference signal PTRS; performing a puncturing process on the SL-PRS or performing a puncturing process on the first signal when a resource collision occurs between the SL PRS and some or all of the first signal; and performing a puncturing process or a rate matching process on the data information when a resource collision occurs between the SL PRS and data information.

[0052] In a specific embodiment of the present disclosure, when the first resource is determined in the PSSCH resource set, the mapping of the SL PRS in the first resource should be mapped according to a pre-configured mapping rule, where the mapping rule includes:

[0053] In order to avoid resource collision between the SL PRS and other information and to prevent the power spectral density (PSD) of the SL PRS from decreasing, only the SL PRS is mapped in the OFDM symbol carrying the SL PRS, and other information is not mapped. Figure 8 shows a schematic diagram of only the SL PRS being mapped in the first preset dedicated resource set.

[0054] In addition, since the SL PRS is likely to cause resource collision with the first signal, mapping the SL PRS to an OFDM symbol including the first signal should be avoided as much as possible. Here, the first signal includes some or all of the first SCI, the PSSCH DMRS, a Channel state information reference signal (abbreviated as CSI RS), and a Phase tracking reference signal (abbreviated as PTRS), but is not limited to them.

[0055] When it is unavoidable to map other information to an OFDM symbol carrying an SL PRS due to factors such as resource limitations, if a resource collision occurs between the SL PRS and the other information, processing is performed on the SL PRS or the other information depending on the detailed type of the other information. Specifically, if a resource collision occurs between the SL PRS and a part or all of the first signal, puncturing is performed on the SL-PRS or puncturing is performed on the first signal, and if a resource collision occurs between the SL PRS and data information, puncturing or rate matching is performed on the data information.

[0056] In a specific embodiment of the present disclosure, a transmission method is described as an example when the PSSCH carries the SL PRS and the SL PRS occupies the same bandwidth as the PSSCH. Here, Fig. 9 is a schematic diagram of a case where the SL PRS is not multiplexed with any of the PSCCH, data information Data, and PSSCH DMRS, and Fig. 10 is a schematic diagram of a case where the SL PRS is multiplexed with the PSSCH DMRS. Specifically, when the PSSCH DMRS and the SL PRS are multiplexed, positioning can be performed by directly using the PSSCH DMRS or by using the PSSCH DMRS and the SL PRS. Furthermore, when the PSSCH DMRS and the SL PRS are mapped to the same OFDM symbol, the PSSCH DMRS can be the SL PRS in the symbol.

[0057] Configuring the SL PRS in this manner contributes to compatibility with R16 and R17 user terminals, does not destroy the conventional resource sensing mechanism, and does not require modification of the first stage SCI or special configuration of the resource sensing reference signal of R16 and R17 to the PSSCH DMRS.

[0058] In addition, the SL PRS may be continuous or non-continuous in the time domain. In addition, the SL PRS can be used for predicting the auxiliary channel in addition to being used for positioning. Specifically, in the above-mentioned method for transmitting the sidelink positioning reference signal SL PRS, when the bandwidth of the first frequency domain covers multiple resource pools, the PSCCH and / or PSSCH are arranged in each corresponding resource pool.

[0059] In addition, here, when the first resource is determined in the PSSCH resource set, PSCCH and / or PSSCH are all configured in multiple resource pools covered by the bandwidth of the first frequency domain (as shown in Figure 11 or Figure 12), so that the complete SL PRS can be accurately identified.

[0060] Optionally, in the above-mentioned method for transmitting sidelink positioning reference signals SL PRS, when transmitting the SL PRS and the first indication information in the first resource, a first SCI is transmitted in each of a plurality of covered resource pools, where each of the plurality of first SCIs indicates a transmission configuration parameter of a PSSCH resource set in a corresponding resource pool.

[0061] Note that, when the bandwidth of the first frequency domain covers multiple resource pools and the first resources are also used to transmit the first indication information, the first SCI is transmitted in all the resource pools, where each of the multiple first SCIs indicates the transmission configuration parameters of the PSSCH resource set in the corresponding resource pool, so that the complete SL PRS can be accurately identified by decoding the PSSCH.

[0062] Optionally, in the above-mentioned method for transmitting sidelink positioning reference signals SL PRS, when transmitting the SL PRS and the first indication information in the first resource, the first indication information is transmitted in at least one resource pool among the plurality of covered resource pools, where when transmitting the first indication information in more than one resource pool, the transmission configuration parameters indicated by the plurality of first indication information are identical.

[0063] Note that, when the bandwidth of the first frequency domain covers multiple resource pools and the first resources are also used for transmitting the first indication information, the first indication information is transmitted in all of the covered resource pools, and the transmission setting parameters indicated by the multiple first indication information are made the same, so that the complete SL PRS can be accurately identified.

[0064] Specifically, in the above-mentioned method for transmitting the sidelink positioning reference signal SL PRS, the SL PRS sequence initialization ID is determined by the cyclic redundancy check (CRC) information of the first stage SCI, or is determined by the positioning priority level of the first terminal.

[0065] In a specific embodiment of the present disclosure, a means for obtaining the SL PRS sequence initialization ID in the time-frequency resource configuration parameters is limited, where the SL PRS sequence initialization ID can be determined based on the cyclic redundancy check (CRC) information of the first stage SCI and generated by the corresponding information bits, or can be determined based on the positioning priority level of the first terminal.

[0066] Optionally, in the above-mentioned method for transmitting a sidelink positioning reference signal SL PRS, the starting PRB in the first frequency domain or the starting subchannel in the frequency domain is determined based on any one of the starting PRB position of a resource pool, the starting PRB position in the third frequency domain of the bandwidth portion BWP, the frequency domain position of the resource block grid common reference point Point A, the starting PRB position of the PSCCH or PSSCH, and the starting PRB position of a carrier.

[0067] In another optional embodiment of the present disclosure, the means for obtaining the first frequency domain start PRB or the frequency domain start subchannel in the time-frequency resource configuration parameters of the SL PRS is limited, where the start PRB position of the resource pool, the start PRB position of the third frequency domain of the bandwidth part BWP, the frequency domain position of the resource block grid common reference point Point A, the start PRB position of the PSCCH or PSSCH, and the start PRB position of the carrier can all be taken as the reference information for the first frequency domain start PRB or the frequency domain start subchannel, and when determining the first frequency domain start PRB or the frequency domain start subchannel, the above reference information is directly taken as the first frequency domain start PRB or the frequency domain start subchannel, or is obtained by adding a preset offset according to the above reference information.

[0068] As shown in Fig. 13, another optional embodiment of the present disclosure further discloses a method for receiving a sidelink positioning reference signal SL PRS, which is applied to a second terminal and includes the following steps:

[0069] In step S1301, obtain time-frequency resource configuration parameters of the SL PRS.

[0070] In step S1302, a first resource is determined, and according to a time-frequency resource configuration parameter, an SL PRS is received in the first resource, or an SL PRS and first indication information are received, where the first indication information is used to indicate transmission parameter information of the first resource.

[0071] An optional embodiment of the present disclosure provides a receiving method for an SL PRS, which is applied to a second terminal. Specifically, when receiving an SL PRS, the method first obtains a resource configuration parameter of the SL PRS, determines a first resource used for transmitting the SL PRS, and then receives the SL PRS on the corresponding first resource according to the resource configuration parameter. When receiving the SL PRS on the first resource, the method receives only the SL PRS according to the type of the transmission resource, or receives the SL PRS and first indication information for indicating the transmission parameter information of the first resource. In one specific embodiment, when the time-frequency resource configuration information is both jointly determined by both the first terminal and the second terminal, the method can receive only the SL PRS to perform positioning for the sidelink. When the time-frequency resource configuration information of the SL PRS contains information determined only by the first terminal, the method needs to receive the SL PRS and the first indication information on the first resource to perform positioning for the sidelink, so that the second terminal can accurately grasp all the time-frequency resource configuration information of the SL PRS based on the first indication information, and ensures high-precision transmission of the SL PRS.

[0072] To sum up, in the embodiment of the present disclosure, a time-frequency resource configuration parameter of the SL PRS is obtained, and the SL PRS is received from the first resource according to the time-frequency resource configuration parameter, and can be combined with the first indication information. This is advantageous to realize the transmission of the SL PRS when the base station does not participate in scheduling and the structure of the physical layer channel is different from the conventional uplink and downlink, and facilitates positioning for the sidelink based on the SL PRS.

[0073] Optionally, in the above mentioned method for receiving a sidelink positioning reference signal (SL PRS), the first resource belongs to at least one kind of resource set: a first preset dedicated resource set and a physical sidelink shared channel (PSSCH) resource set.

[0074] In an optional embodiment of the present disclosure, the first resource may be determined in a single resource set or may be determined in multiple resource sets, where the resource set includes but is not limited to a first preset dedicated resource set and a PSSCH resource set, etc. In one specific embodiment, when the first resource is determined jointly by both the first preset dedicated resource set and the PSSCH resource set, the SL PRS may be carried in the resource of the first preset dedicated resource set, and the first indication information may be carried in the resource of the PSSCH resource set.

[0075] Optionally, by configuring the first preset dedicated resource set, it is possible to avoid the impact on conventional terminals and reduce interference with the SL PRS caused by other signals, and further to allocate a larger frequency domain bandwidth for the SL PRS, which is beneficial for ensuring positioning accuracy.

[0076] The resource collection here may be expressed as a resource pool or the like.

[0077] Specifically, in the above-mentioned receiving method for sidelink positioning reference signal SL PRS, the time-frequency resource configuration parameters include at least one of time domain symbol number configuration information of SL PRS, time domain symbol position configuration information of SL PRS, frequency domain pattern configuration information of SL PRS, first frequency domain start PRB configuration information of SL PRS, frequency domain start subchannel configuration information of SL PRS, first frequency domain bandwidth configuration information of SL PRS, first appearance period configuration information of SL PRS, and sequence initialization ID configuration information of SL PRS, where the granularity of the first frequency domain bandwidth is a subchannel or a PRB.

[0078] In a specific embodiment of the present disclosure, the time-frequency resource configuration parameters of the SL PRS are described by way of example, and when actually configured, the time-frequency resource configuration parameters may include at least one of the above.

[0079] In addition, the above-mentioned time-frequency resource configuration parameters can be configured by RRC signaling, can be preset, or can be determined according to the indication of the first indication information. If the parameters are determined according to the indication of the first indication information, the information of the parameters can be considered to be determined according to the first terminal's own information.

[0080] In addition, in a specific embodiment of the present disclosure, the frequency domain pattern configuration information of the SL PRS is a comb size, including but not limited to a comb size, a resource element (abbreviated as RE) of each PRB of the starting symbol, and a mapping offset of RE granularity in each symbol. In addition, in the case of overlapping mapping in any symbol, only the RE mapping position in each PRB in the frequency domain is required. Referring to FIG. 2, for a user terminal, the comb size is 4, the starting mapping RE position in each PRB of the starting symbol is index=0, and the RE mapping offset in each symbol is {0, 2, 1, 3}.

[0081] In addition, in the bandwidth setting information of the first frequency domain of the SL PRS, the granularity of the bandwidth of the first frequency domain is a subchannel or a PRB. The time-frequency resource setting parameters may include the starting PRB setting information of the first frequency domain of the SL PRS, but may not include the starting subchannel setting information of the frequency domain of the SL PRS. Alternatively, the time-frequency resource setting parameters may include the starting subchannel setting information of the frequency domain of the SL PRS, but may not include the starting PRB setting information of the first frequency domain of the SL PRS.

[0082] Optionally, in the above mentioned method for receiving a sidelink positioning reference signal SL PRS, the first indication information is carried by at least one of the sidelink control information SCI, the sidelink positioning information SPI, the media access control unit MAC CE, the radio resource control RRC signalling, the sidelink data packet, the physical sidelink control channel PSCCH, the physical sidelink shared channel PSSCH, the physical sidelink broadcast channel PSBCH, the physical sidelink feedback channel PSFCH, the physical sidelink discovery channel PSDCH and the physical sidelink positioning channel PSPCH.

[0083] Here, "SPI" refers to an instruction information type for indicating positioning related information in the side link. However, the name of the instruction information type for indicating positioning related information is not limited to SPI.

[0084] Specifically, in the above-mentioned receiving method for a sidelink positioning reference signal SL PRS, the transmission parameter information includes at least one of the following: the number of time domain symbols of the SL PRS, the time domain symbol position of the SL PRS, the frequency domain pattern of the SL PRS, the first frequency domain start PRB of the SL PRS, the frequency domain start subchannel of the SL PRS, the first frequency domain bandwidth of the SL PRS, the first appearance period of the SL PRS, the sequence initialization ID of the SL PRS, and the SL PRS indicator information.

[0085] It should be noted that, since the first indication information is used to indicate the transmission parameter information of the first resource, the type of the transmission parameter information corresponds to the type of the resource configuration parameter, and the number of types of the transmission parameter information during actual transmission corresponds to the number of types of the resource configuration parameter determined according to the self information of the first terminal, thus ensuring the integrity of the first indication information when it gives an indication.

[0086] Furthermore, in the above-mentioned method for receiving a sidelink positioning reference signal SL PRS, when the first resource belongs to a first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include: a symbol position occupied by the first preset dedicated resource set in each slot, a starting PRB in a second frequency domain of the first preset dedicated resource set, a bandwidth in a second frequency domain of the first preset dedicated resource set, a second appearance period of the first preset dedicated resource set, the number of transmissions of the SL PRS in each period, and the number of time domain resources between two adjacent SL PRS in each period.

[0087] Here, the bandwidth occupation pattern of the second frequency domain includes at least one of completely occupying the current resource pool, covering multiple resource pools, completely occupying a partial bandwidth BWP, completely occupying a carrier, and occupying a preset number of PRBs.

[0088] In an optional embodiment of the present disclosure, when the first resource needs to be determined in the first preset dedicated resource set, the first preset dedicated resource set is configured first, that is, the symbol position in the slot corresponding to the first preset dedicated resource set, the starting PRB in the second frequency domain, the bandwidth in the second frequency domain, the second occurrence period, the number of transmissions of the SL PRS in each period, and the number of time domain resources between two adjacent SL PRS in each period are first obtained through RRC signaling configuration or preset configuration, as shown in Figure 3. During the above configuration parameters are configured, the structure of the slot will change, which will affect the calculation of the TBS to a certain extent. Therefore, a new information field needs to be incorporated into the first stage SCI, which is used to indicate the number of symbols or detailed overhead occupied by the SL PRS when the current slot calculates the TBS.

[0089] Specifically, this embodiment further describes the occupancy pattern of the bandwidth of the second frequency region by way of example. Here, the bandwidth of the second frequency region can occupy the current resource pool completely, cover multiple resource pools, occupy the partial bandwidth BWP completely, occupy the carrier completely, and / or occupy a preset number of PRBs. In practical application, the bandwidth of the second frequency region can be determined according to the bandwidth actually occupied by the SL PRS.

[0090] Specifically, in the above-mentioned sidelink positioning reference signal SL PRS receiving method, when the first resource belongs to a first preset dedicated resource set, the method includes: determining a mapping position of the SL PRS and / or a code division multiplexing means to be used according to a user identification of the first terminal or the second terminal, the code division multiplexing means being OCC or CS; or determining the mapping location of the SL PRS and / or the code division multiplexing means to be used based on the resource mapping location of the SL PRS request signaling sent by the second terminal; Or, the method includes determining user information of the first terminal and time-frequency resource information of the SL PRS based on the received PSCCH, PSSCH, or PSPCH, and / or determining positioning information based on the PSSCH or PSPCH.

[0091] Here, the PSCCH, PSSCH, and PSPCH are carried in the first preset dedicated resource set, the remaining resources in the slot in which the SL PRS is located, or in the first slot that is separated from the first preset dedicated resource set by the preset number of time domain resources.

[0092] In another alternative embodiment of the present disclosure, multiple first terminals can multiplex using the same dedicated resources in the first preset dedicated resource set. In this case, resources corresponding to different first terminals can be orthogonalized to ensure positioning accuracy. Therefore, multiple resources are orthogonalized according to a preset rule during transmission. Therefore, corresponding first resources need to be determined again according to a preset rule during reception. Here, the manner of receiving resources corresponds to the manner of transmitting resources. For example, when mapping is performed according to a user indicator (as shown in FIG. 4), the mapping position of the SL PRS and / or the code division multiplexing means to be used are determined based on the user indicator of the first terminal or the second terminal, and thus the corresponding SL PRS is determined. When indicated by at least one of PSCCH, PSSCH and PSPCH (as shown in FIG. 5), obtain the PSCCH, PSSCH and / or PSPCH at a preset position, and further determine user information of the first terminal and time-frequency resource information of the SL PRS according to the PSCCH, PSSCH or PSPCH, and / or determine positioning information according to the PSSCH or PSPCH, where the user information includes but is not limited to the source ID of the user terminal.

[0093] Specifically, as shown in FIG. 6, the PSCCH, PSSCH, and PSPCH can be carried in the first preset dedicated resource set, the remaining resources (resources corresponding to the Normal Resource Pool) in the slot in which the SL PRS is located, or the first slot that is a preset number of time domain resources away from the first preset dedicated resource set.

[0094] The above-mentioned code division multiplexing means is an orthogonal cover code OCC or a cyclic shift code CS, which is related to the type of sequence adopted by the SL PRS. Here, when the Gold sequence formula is adopted, the code division multiplexing means is OCC, and when the ZC sequence formula is adopted, the code division multiplexing means is CS.

[0095] As shown in Fig. 14, another optional embodiment of the present disclosure provides a sidelink positioning reference signal (SL PRS) transmitting device, which is applied in a first terminal and includes a first processing module 1401 and a second processing module 1402.

[0096] The first processing module 1401 is configured to obtain time-frequency resource configuration parameters of the SL PRS.

[0097] The second processing module 1402 is configured to determine a first resource, and transmit the SL PRS in the first resource according to the time-frequency resource configuration parameter, or transmit the SL PRS and first indication information, where the first indication information is used to indicate transmission parameter information of the first resource.

[0098] Optionally, in the above-mentioned transmitting device, the first resource is determined in at least one resource set of a first preset dedicated resource set and a physical sidelink shared channel (PSSCH) resource set.

[0099] Specifically, in the above-mentioned transmitting device, the time-frequency resource configuration parameters include at least one of time domain symbol number configuration information of the SL PRS, time domain symbol position configuration information of the SL PRS, frequency domain pattern configuration information of the SL PRS, first frequency domain start PRB configuration information of the SL PRS, frequency domain start subchannel configuration information of the SL PRS, first frequency domain bandwidth configuration information of the SL PRS, first appearance period configuration information of the SL PRS, and sequence initialization ID configuration information of the SL PRS, where the granularity of the first frequency domain bandwidth is a subchannel or a PRB.

[0100] Furthermore, in the above-mentioned transmitting device, the first indication information is carried by at least one of the sidelink control information SCI, the sidelink positioning information SPI, the media access control layer control unit MAC CE, the radio resource control RRC signaling, the sidelink data packet, the physical sidelink control channel PSCCH, the physical sidelink shared channel PSSCH, the physical sidelink broadcast channel PSBCH, the physical sidelink feedback channel PSFCH, the physical sidelink discovery channel PSDCH and the physical sidelink positioning channel PSPCH.

[0101] Specifically, in the above-mentioned transmitting device, the transmission parameter information includes at least one of the number of time domain symbols of the SL PRS, the time domain symbol position of the SL PRS, the frequency domain pattern of the SL PRS, the first frequency domain starting PRB of the SL PRS, the frequency domain starting subchannel of the SL PRS, the first frequency domain bandwidth of the SL PRS, the first appearance period of the SL PRS, the sequence initialization ID of the SL PRS, and the SL PRS indicator information.

[0102] Optionally, in the above-mentioned transmitting device, when the first resource is determined in a first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include a symbol position occupied by the first preset dedicated resource set in each slot, a starting PRB in the second frequency domain of the first preset dedicated resource set, a bandwidth in the second frequency domain of the first preset dedicated resource set, a second appearance period of the first preset dedicated resource set, a transmission number of the SL PRS in each period, and a number of time domain resources between two adjacent SL PRS in each period, wherein the occupancy form of the bandwidth in the second frequency domain includes at least one of completely occupying a current resource pool, covering a plurality of resource pools, completely occupying a partial bandwidth BWP, completely occupying a carrier, and occupying a preset number of PRBs.

[0103] Optionally, the above-mentioned sending device further comprises: a fifth processing module, when a plurality of first terminals share the first preset dedicated resource set.

[0104] The fifth processing module is configured to: correspond a mapping position of the SL PRS and / or a code division multiplexing means to be used to a user indicator of the first terminal or the second terminal, or correspond a mapping position of the SL PRS and / or a code division multiplexing means to be used to a resource mapping position of the SL PRS request signaling transmitted by the second terminal, or transmit the SL PRS and at least one of a PSCCH, a PSSCH, and a PSPCH in a first preset dedicated resource set, or transmit the SL PRS in the first preset dedicated resource set and transmit at least one of a PSCCH, a PSSCH, and a PSPCH in a first slot that is away from the remaining resource sets in the slot in which the SL PRS is located or the first preset dedicated resource set by the preset number of time domain resources.

[0105] Here, the code division multiplexing means is an orthogonal cover code OCC or a cyclic shift code CS, the PSCCH, the PSSCH or the PSPCH is used to carry user information indicating the first terminal and time-frequency resource information of the SL PRS, and the PSSCH or the PSPCH is further used to carry positioning information.

[0106] Specifically, in the above-mentioned transmitting device, when the first resource is determined in the sidelink shared channel PSSCH resource set, the bandwidth of the first frequency domain of the SL PRS satisfies at least one of the following conditions: the bandwidth of the first frequency domain is equal to the bandwidth of the third frequency domain of the PSSCH resource set; the bandwidth of the first frequency domain completely occupies the current resource pool; the bandwidth of the first frequency domain covers multiple resource pools; the bandwidth of the first frequency domain completely occupies the BWP; and the bandwidth of the first frequency domain completely occupies the carrier wave.

[0107] Optionally, in the above-mentioned transmitting device, only the SL PRS is transmitted in the first resource, or the SL PRS and the physical sidelink PRS are transmitted in the first resource. share The SL PRS transmits at least one of a demodulation reference signal PSSCH DMRS of the channel, a first SCI indicating decoding of the PSSCH, a second SCI indicating SL PRS transmission parameters and / or positioning information, dedicated information indicating SL PRS transmission parameters and / or positioning information, a MAC CE indicating SL PRS transmission parameters and / or positioning information, RRC signaling indicating SL PRS transmission parameters and / or positioning information, and data information, where the data information can be used to indicate the positioning information.

[0108] Optionally, in the above-mentioned transmitting device, the mapping rule of the SL PRS in the first resource is: Mapping only the SL PRS to the OFDM symbol carrying the SL PRS; not mapping the SL PRS in the OFDM symbol including the first signal; When a resource collision occurs between the SL PRS and some or all of the first signal, puncturing the SL-PRS or puncturing the first signal; and When a resource collision occurs between the SL PRS and the data information, the data information is subjected to at least one of puncturing processing or rate matching processing.

[0109] Here, the first signal includes some or all of the first SCI, the PSSCH DMRS, the channel state information reference signal CSI RS, and the phase tracking reference signal PTRS.

[0110] Specifically, in the above-described transmitting device, when the bandwidth of the first frequency domain covers a plurality of resource pools, the PSCCH and / or the PSSCH is provided in each of the corresponding resource pools.

[0111] Optionally, when the above-mentioned transmitting device transmits the SL PRS and the first indication information in the first resource, the transmitting device transmits the first SCI in all of the covered multiple resource pools, where each of the multiple first SCIs indicates the transmission configuration parameters of the PSSCH resource set in the corresponding resource pool.

[0112] Optionally, in the above-mentioned transmitting device, when transmitting the SL PRS and the first indication information in the first resource, the first indication information is transmitted in at least one resource pool among the plurality of covered resource pools, where when transmitting the first indication information in more than one resource pool, the transmission configuration parameters indicated by the plurality of first indication information are identical.

[0113] Specifically, in the above-mentioned transmitting device, the SL PRS sequence initialization ID is determined based on the cyclic redundancy check (CRC) information of the first stage SCI, or is determined based on the positioning priority level of the first terminal.

[0114] Optionally, in the above-mentioned transmitting device, the starting PRB in the first frequency domain or the starting subchannel in the frequency domain is determined based on any of the starting PRB position of a resource pool, the starting PRB position in the third frequency domain of the bandwidth portion BWP, the frequency domain position of the resource block grid common reference point Point A, the starting PRB position of a PSCCH or a PSSCH, and the starting PRB position of a carrier wave.

[0115] The embodiment of the transmitting device in the present disclosure is 1 A transmitting device corresponding to an embodiment of a method for transmitting a sidelink positioning reference signal SL PRS applied to a terminal, 1 All the implementation means according to the embodiments of the transmitting method for sidelink positioning reference signal SL PRS applied to the terminal can be applied to the embodiments of the transmitting device, and can achieve the same technical effects.

[0116] As shown in Fig. 15, another optional embodiment of the present disclosure provides a receiving device for a sidelink positioning reference signal (SL PRS), which is applied in a second terminal and includes a third processing module 1501 and a fourth processing module 1502.

[0117] The third processing module 1501 is configured to obtain time-frequency resource configuration parameters of the SL PRS.

[0118] The fourth processing module 1502 is configured to determine a first resource, and receive the SL PRS in the first resource according to the time-frequency resource configuration parameter, or receive the SL PRS and first indication information, where the first indication information is used to indicate transmission parameter information of the first resource.

[0119] Optionally, in the above-mentioned receiving apparatus, the first resource belongs to at least one resource set of a first preset dedicated resource set and a physical sidelink shared channel (PSSCH) resource set.

[0120] Specifically, in the above-mentioned receiving device, the time-frequency resource configuration parameters include at least one of time domain symbol number configuration information of the SL PRS, time domain symbol position configuration information of the SL PRS, frequency domain pattern configuration information of the SL PRS, first frequency domain start PRB configuration information of the SL PRS, frequency domain start subchannel configuration information of the SL PRS, first frequency domain bandwidth configuration information of the SL PRS, first appearance period configuration information of the SL PRS, and sequence initialization ID configuration information of the SL PRS, where the granularity of the first frequency domain bandwidth is a subchannel or a PRB.

[0121] Optionally, in the above-mentioned receiving device, the first indication information is carried by at least one of the sidelink control information SCI, the sidelink positioning information SPI, the media access control layer control unit MAC CE, the radio resource control RRC signaling, the sidelink data packet, the physical sidelink control channel PSCCH, the physical sidelink shared channel PSSCH, the physical sidelink broadcast channel PSBCH, the physical sidelink feedback channel PSFCH, the physical sidelink discovery channel PSDCH and the physical sidelink positioning channel PSPCH.

[0122] Specifically, in the above-mentioned receiving device, the transmission parameter information includes at least one of the number of time domain symbols of the SL PRS, the time domain symbol position of the SL PRS, the frequency domain pattern of the SL PRS, the first frequency domain starting PRB of the SL PRS, the frequency domain starting subchannel of the SL PRS, the first frequency domain bandwidth of the SL PRS, the first appearance period of the SL PRS, the sequence initialization ID of the SL PRS, and the SL PRS indicator information.

[0123] Furthermore, in the above-mentioned receiving device, when the first resource belongs to a first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include: a symbol position occupied by the first preset dedicated resource set in each slot, a starting PRB in the second frequency domain of the first preset dedicated resource set, a bandwidth in the second frequency domain of the first preset dedicated resource set, a second appearance period of the first preset dedicated resource set, a transmission number of the SL PRS in each period, and a number of time domain resources between two adjacent SL PRS in each period, wherein the occupancy manner of the bandwidth in the second frequency domain includes at least one of completely occupying a current resource pool, covering a plurality of resource pools, completely occupying a partial bandwidth BWP, completely occupying a carrier, and occupying a preset number of PRBs.

[0124] Specifically, the above-mentioned receiving device further includes a sixth processing module when the first resource belongs to a first preset dedicated resource set. The sixth processing module includes: determining the mapping location of the SL PRS and / or the code division multiplexing means to be used based on the user identification of the first terminal or the second terminal, or Determining the mapping location of the SL PRS and / or the code division multiplexing means to be used according to the resource mapping location of the SL PRS request signaling sent by the second terminal; or The first terminal is configured to determine user information and time-frequency resource information of the SL PRS of the first terminal according to the received PSCCH, PSSCH or PSPCH, and / or determine positioning information according to the PSSCH or PSPCH.

[0125] Here, the code division multiplexing means is OCC or CS, and the PSCCH, PSSCH, and PSPCH are carried by the first preset dedicated resource set, the remaining resources of the slot in which the SL PRS is located, or the first slot that is separated from the first preset dedicated resource set by the number of preset time domain resources.

[0126] The embodiment of the receiving device in the present disclosure is a receiving device corresponding to the embodiment of the receiving method for a sidelink positioning reference signal SL PRS applied to the second terminal described above, and all the implementation means in the embodiment of the receiving method for a sidelink positioning reference signal SL PRS applied to the second terminal described above can be applied to the embodiment of the receiving device, and can also achieve the same technical effects.

[0127] Another optional embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored therein, which, when executed by a processor, realizes the above-mentioned method for transmitting a sidelink positioning reference signal SL PRS applied to a first terminal, or realizes the above-mentioned method for receiving a sidelink positioning reference signal SL PRS applied to a second terminal.

[0128] Additionally, the present disclosure may repeat numerical and / or alphabetical references in the different examples. Such repetition is for the purposes of brevity and clarity and does not dictate a relationship between each of the embodiments and / or settings described.

[0129] Furthermore, in this document, relationship terms such as first, second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily limit or imply that such a relationship or order actually exists between those entities or operations. And, "comprises," "includes," or any other variation thereof means a non-exclusive inclusion.

[0130] The above division of each module is merely based on logical functions, and in actual implementation, all or part of the modules may be integrated into one physical entity, or may be physically independent. All of these modules may be implemented in a form in which software is called by a processing element, or all may be implemented in the form of hardware, or some modules may be implemented in a form in which software is called by a processing element and some modules may be implemented in the form of hardware. For example, the determination module may be an independently provided processing element, or may be integrated and implemented in a chip of the above-mentioned device, or may be stored in the memory of the above-mentioned device in the form of program code and called by a processing element of the above-mentioned device to execute the functions of the above-mentioned determination module. The implementation of other modules is similar. All or part of these modules may be integrated, or may be implemented independently. The processing element described herein may be an integrated circuit capable of processing signals. When implemented, each step of the above-mentioned method or each of the above-mentioned modules may be performed by an integrated logic circuit of hardware or a software-type instruction in a processor element.

[0131] For example, each module, unit, sub-unit, or sub-module may be configured as one or more integrated circuits configured to perform the above method, such as one or more application specific integrated circuits (ASICs), one or more microprocessors (DSPs), or one or more field programmable gate arrays (FPGAs). For example, when a certain module is realized in the form of a program code controlled by a processing element, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor capable of controlling a program code. For example, these modules may be integrated and realized in the form of a system-on-a-chip (SOC).

[0132] Terms such as "first", "second", and the like used in the specification and claims of the present disclosure are intended to distinguish between similar objects and are not necessarily used to describe a particular order or sequence. Data used in this manner may be interchanged in some cases, such that the embodiments of the present disclosure described herein may be performed in an order other than that shown or described herein. In addition, "comprise", "have" and any variation thereof mean a non-exclusive inclusion, and for example, a process, method, system, product, or device including a series of steps or units is not limited to the steps or units explicitly listed, but may include steps or units not explicitly listed, or other steps or units inherent to these processes, methods, products, or devices. In addition, "and / or" used in the specification and claims represents at least one of the objects connected thereto, and for example, A and / or B and / or C includes seven types of situations, including only including A, only including B, only including C, both A and B being present, both B and C being present, both A and C being present, and all of A, B, and C being present. Similarly, "at least one of A and B" as used in the specification and claims should be understood as "A only, B only, or both A and B."

[0133] The above description is merely a selective embodiment of the present disclosure, and a person skilled in the art may realize various improvements and additions without departing from the principles described in the present disclosure, and these improvements and additions should also fall within the scope of protection of the present disclosure.

Claims

1. A sidelink positioning reference signal (SL PRS) transmission method, applied to a first terminal, comprising: Obtaining time-frequency resource configuration parameters of a SL PRS; determining a first resource, and transmitting the SL PRS on the first resource according to the time-frequency resource configuration parameter, or transmitting the SL PRS and first indication information; The first indication information is used to indicate transmission parameter information of the first resource, The sequence initialization ID configuration information of the SL PRS in the time-frequency resource configuration parameter of the SL PRS is configured by RRC signaling, or the sequence initialization ID of the SL PRS in the time-frequency resource configuration parameter of the SL PRS is determined according to the cyclic redundancy check (CRC) information of the first stage SCI. A transmission method comprising:

2. The first resource is determined in at least one of a first preset dedicated resource pool and a physical sidelink shared channel (PSSCH) resource set. The method for transmitting Sidelink Positioning Reference Signals (SL PRS) according to claim 1, characterized in that

3. The time-frequency resource configuration parameter further comprises: Time domain symbol number setting information of the SL PRS; Time domain symbol position setting information of the SL PRS; Frequency domain pattern setting information of the SL PRS; Starting PRB configuration information of the first frequency domain of the SL PRS; Starting subchannel configuration information in the frequency domain of the SL PRS; Bandwidth setting information of the first frequency domain of the SL PRS; and a first appearance period setting information of the SL PRS; Here, the granularity of the bandwidth of the first frequency region is a subchannel or a PRB. The method for transmitting Sidelink Positioning Reference Signals (SL PRS) according to claim 1, characterized in that

4. The first indication information is Sidelink control information SCI, Sidelink positioning information SPI, A media access control layer control unit MAC CE, Radio resource control (RRC) signaling; Sidelink data packets, A physical sidelink control channel PSCCH, Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Broadcast Channel PSBCH, Physical sidelink feedback channel PSFCH, A physical sidelink discovery channel (PSDCH), and a physical sidelink positioning channel (PSPCH) The method for transmitting Sidelink Positioning Reference Signals (SL PRS) according to claim 1, characterized in that

5. The transmission parameter information is the number of time domain symbols of the SL PRS; the time domain symbol position of the SL PRS; A frequency domain pattern of the SL PRS; A starting PRB of the first frequency region of the SL PRS; A frequency domain starting subchannel of the SL PRS; A bandwidth of the first frequency region of the SL PRS; the first occurrence period of the SL PRS; The sequence initialization ID of the SL PRS, and The SL PRS identification information includes at least one of The method for transmitting Sidelink Positioning Reference Signals (SL PRS) according to claim 1, characterized in that

6. When the first resource is defined in the first preset dedicated resource pool and a plurality of first terminals share the first preset dedicated resource pool, Transmitting the SL PRS and at least one of a PSCCH, a PSSCH, and a PSPCH in the first preset dedicated resource pool; or Transmitting the SL PRS in the first preset dedicated resource pool, and transmitting at least one of a PSCCH, a PSSCH, and a PSPCH in a remaining resource set in a slot in which the SL PRS is located, or in a first slot that is a preset number of time domain resources away from the first preset dedicated resource pool; Here, the PSCCH, PSSCH, or PSPCH is used to carry user information indicating the first terminal and time-frequency resource information of the SL PRS, and the PSSCH or PSPCH is further used to carry positioning information. The method for transmitting Sidelink Positioning Reference Signals (SL PRS) according to claim 2, characterized in that

7. If the first resource is defined in the physical sidelink shared channel PSSCH resource set, the first frequency domain bandwidth of the SL PRS is The bandwidth of the first frequency region is equal to the bandwidth of a third frequency region of the PSSCH resource set; The bandwidth of the first frequency region completely occupies a current resource pool; The bandwidth of the first frequency region covers a plurality of resource pools; the bandwidth of the first frequency region completely occupies a BWP; and the bandwidth of the first frequency region completely occupies a carrier wave. The method for transmitting Sidelink Positioning Reference Signals (SL PRS) according to claim 2, characterized in that

8. Only the SL PRS is transmitted in the first resource; or In the first resource, the SL PRS; At least one of a demodulation reference signal (PSSCH) DMRS of a physical sidelink shared channel, a first SCI for indicating decoding of a PSSCH, a second SCI for indicating a transmission parameter of the SL PRS, dedicated information for indicating a transmission parameter of the SL PRS, a MAC CE for indicating a transmission parameter of the SL PRS, an RRC signaling for indicating a transmission parameter of the SL PRS, and data information is transmitted; The data information can indicate positioning information. The method for transmitting Sidelink Positioning Reference Signals (SL PRS) according to claim 7, characterized in that

9. The mapping rule of the SL PRS in the first resource is: Mapping only the SL PRS to an orthogonal frequency division multiplexing OFDM symbol carrying the SL PRS; The SL PRS is not mapped to an OFDM symbol including a first signal, the first signal including some or all of the first SCI, the PSSCH DMRS, a channel state information reference signal CSI RS, and a phase tracking reference signal PTRS; When a resource collision occurs between the SL PRS and a part or all of the first signal, performing a puncturing process on the first signal in a time domain; When a resource collision occurs between the SL PRS and the data information, the SL PRS performs a puncturing process or a rate matching process on the data information in the time domain; and the OFDM symbols carrying the SL PRS are continuous in the time domain. The method for transmitting Sidelink Positioning Reference Signals (SL PRS) according to claim 8, characterized in that

10. The start PRB of the first frequency domain or the start subchannel of the frequency domain is The starting PRB position of the resource pool, the starting PRB position of the third frequency domain of the bandwidth portion BWP, the frequency domain position of the resource block grid common reference point Point A, the starting PRB position of the PSCCH or PSSCH, and the starting PRB position of the carrier wave are determined based on any one of the following: The method for transmitting Sidelink Positioning Reference Signals (SL PRS) according to claim 3 or 5, characterized in that

11. A method for receiving a sidelink positioning reference signal (SL PRS), the method being applied to a second terminal, comprising: Obtaining time-frequency resource configuration parameters of a SL PRS; determining a first resource, and receiving the SL PRS or receiving the SL PRS and first indication information on the first resource according to the time-frequency resource configuration parameter; The first indication information is used to indicate transmission parameter information of a first resource; The sequence initialization ID configuration information of the SL PRS in the time-frequency resource configuration parameter of the SL PRS is configured by RRC signaling, or the sequence initialization ID of the SL PRS in the time-frequency resource configuration parameter of the SL PRS is determined according to the cyclic redundancy check (CRC) information of the first stage SCI. A method for receiving a sidelink positioning reference signal (SL PRS), comprising:

12. The first resource belongs to at least one of a first preset dedicated resource pool and a physical sidelink shared channel (PSSCH) resource set. The method for receiving a Sidelink Positioning Reference Signal (SL PRS) according to claim 11, characterized in that

13. The first indication information is carried by at least one of the following: sidelink control information SCI, sidelink positioning information SPI, media access control layer control unit MAC CE, radio resource control RRC signaling, sidelink data packets, physical sidelink control channel PSCCH, physical sidelink shared channel PSSCH, physical sidelink broadcast channel PSBCH, physical sidelink feedback channel PSFCH, physical sidelink discovery channel PSDCH, and physical sidelink positioning channel PSPCH. The method for receiving a Sidelink Positioning Reference Signal (SL PRS) according to claim 11, characterized in that

14. The transmission parameter information is At least one of the following information is included: the number of time domain symbols of the SL PRS, the time domain symbol position of the SL PRS, the frequency domain pattern of the SL PRS, the first frequency domain start PRB of the SL PRS, the frequency domain start subchannel of the SL PRS, the first frequency domain bandwidth of the SL PRS, the first occurrence period of the SL PRS, the sequence initialization ID of the SL PRS, and the indicator information of the SL PRS. The method for receiving a Sidelink Positioning Reference Signal (SL PRS) according to claim 11, characterized in that

15. A sidelink positioning reference signal (SL PRS) transmitting device, applied to a first terminal, comprising: A first processing module configured to obtain a time-frequency resource configuration parameter of a SL PRS; a second processing module configured to determine a first resource and transmit the SL PRS or the SL PRS and first indication information on the first resource based on the time-frequency resource configuration parameter; The first indication information is used to indicate transmission parameter information of the first resource, The sequence initialization ID configuration information of the SL PRS in the time-frequency resource configuration parameter of the SL PRS is configured by RRC signaling, or the sequence initialization ID of the SL PRS in the time-frequency resource configuration parameter of the SL PRS is determined according to the cyclic redundancy check (CRC) information of the first stage SCI. A sidelink positioning reference signal (SL PRS) transmitting device, comprising:

16. A sidelink positioning reference signal (SL PRS) receiving device, applied to a second terminal, comprising: A third processing module configured to obtain time-frequency resource configuration parameters of the SL PRS; and and a fourth processing module configured to determine a first resource and receive the SL PRS or the SL PRS and first indication information on the first resource based on the time-frequency resource configuration parameter; The first indication information is used to indicate transmission parameter information of the first resource; The sequence initialization ID configuration information of the SL PRS in the time-frequency resource configuration parameter of the SL PRS is configured by RRC signaling, or the sequence initialization ID of the SL PRS in the time-frequency resource configuration parameter of the SL PRS is determined according to the cyclic redundancy check (CRC) information of the first stage SCI. A sidelink positioning reference signal (SL PRS) receiving device,

17. A computer-readable storage medium, comprising: A computer program is stored in the When the computer program is executed by a processor, a method for transmitting a sidelink positioning reference signal SL PRS applied to a first terminal according to any one of claims 1 to 9 or a method for receiving a sidelink positioning reference signal SL PRS applied to a second terminal according to any one of claims 11 to 14 is realized. A computer-readable storage medium comprising:

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