Transmission method of side link positioning reference signal, terminal and network side equipment

Abstract

The invention discloses a transmission method of a side link positioning reference signal, a terminal and network side equipment, and belongs to the technical field of wireless communication, the transmission method of the side link positioning reference signal in the embodiment of the invention comprises the following steps: the terminal determines that SL PRS needs to be sent; the terminal sends a target request to an access network device, the target request being used for requesting allocation of a side link resource, and the side link resource being used for sending the SL PRS; the terminal acquires a side link resource allocated to the terminal by the access network equipment; and the terminal sends the SL PRS on the allocated side link resource.

Description

Technical Field

[0001] The present application belongs to the field of wireless communication technology, and specifically relates to a transmission method, terminal and network-side equipment of a sidelink positioning reference signal. Background Art

[0002] In the related technology, for sidelink (SL) transmission, only the scenario of sidelink data to be transmitted in the logical channel is discussed. If the sidelink transmission is related to the sidelink positioning reference signal (SL-PRS), that is, in the scenario involving SL-PRS transmission, how to implement the related process of SL-PRS transmission needs to be solved urgently. Summary of the invention

[0003] The embodiments of the present application provide a sidelink positioning reference signal transmission method, terminal and network-side equipment, which can provide a technical solution for implementing SL-PRS transmission.

[0004] In a first aspect, a method for transmitting a sidelink positioning reference signal is provided, comprising: a terminal determines that an SL PRS needs to be sent; the terminal sends a target request to an access network device, wherein the target request is used to request allocation of sidelink resources, and the sidelink resources are used for sending the SL PRS; the terminal obtains the sidelink resources allocated to the terminal by the access network device; and the terminal sends the SL PRS on the allocated sidelink resources.

[0005] In a second aspect, a method for allocating side link resources is provided, comprising: an access network device receives a target request sent by a terminal, wherein the target request is used to request allocation of side link resources, and the side link resources are used for sending the SLPRS; the access network device allocates side link resources for sending the SL PRS to the terminal.

[0006] According to a third aspect, a transmission device for a sidelink positioning reference signal is provided, comprising: a determination module for determining the need to send an SL PRS; a first transmission module for sending a target request to an access network device, wherein the target request is used to request allocation of sidelink resources, and the sidelink resources are used for sending the SL PRS; an acquisition module for acquiring the sidelink resources allocated by the access network device to the terminal; and the first transmission module is further used to send the SL PRS on the allocated sidelink resources.

[0007] In a fourth aspect, a device for allocating side link resources is provided, comprising: a second transmission module, used to receive a target request sent by a terminal, wherein the target request is used to request the allocation of side link resources, and the side link resources are used for sending the SL PRS; an allocation module, used to allocate side link resources for the terminal for sending the SL PRS.

[0008] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0009] In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the method described in the first aspect.

[0010] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0011] In an eighth aspect, a network side device is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the method described in the second aspect.

[0012] In a ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0013] In the tenth aspect, a wireless communication system is provided, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0014] In the eleventh aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0015] In the twelfth aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0016] In an embodiment of the present application, when the terminal determines that it needs to send SL PRS, it can send a target request for side link resources for transmitting SL PRS to the access network device, and then send SLPRS on the side link resources allocated by the access network device, thereby achieving the sending of SL PRS. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A block diagram showing a wireless communication system to which the embodiments of the present application can be applied;

[0018] Figure 2a A schematic diagram of an SL positioning architecture in an embodiment of the present application is shown;

[0019] Figure 2b A schematic diagram of another SL positioning architecture in an embodiment of the present application is shown;

[0020] Figure 2c A schematic diagram of another SL positioning architecture in an embodiment of the present application is shown;

[0021] Figure 3 A schematic diagram showing a flow chart of a method for transmitting a sidelink positioning reference signal provided in an embodiment of the present application;

[0022] Figure 4 Another schematic diagram of a flow chart of a method for transmitting a sidelink positioning reference signal provided in an embodiment of the present application is shown;

[0023] Figure 5 Another schematic flow chart of a method for transmitting a sidelink positioning reference signal provided in an embodiment of the present application is shown;

[0024] Figure 6 Another schematic flow chart of a method for transmitting a sidelink positioning reference signal provided in an embodiment of the present application is shown;

[0025] Figure 7 A schematic diagram showing a flow chart of a method for allocating sidelink resources provided in an embodiment of the present application;

[0026] Figure 8 Another schematic flow chart of a method for transmitting a sidelink positioning reference signal provided in an embodiment of the present application is shown;

[0027] Fig. 9 Another schematic flow chart of a method for transmitting a sidelink positioning reference signal provided in an embodiment of the present application is shown;

[0028] Fig.10a A schematic diagram of the structure of an SL-BSR MAC CE in an embodiment of the present application is shown;

[0029] Fig.10b A schematic diagram showing a flow chart of a method for allocating sidelink resources in an embodiment of the present application;

[0030] Fig.11 A schematic diagram showing a structure of a transmission device for a sidelink positioning reference signal provided in an embodiment of the present application is shown;

[0031] Fig.12 A schematic diagram showing a structure of a device for allocating sidelink resources provided in an embodiment of the present application is shown;

[0032] Fig.13 A schematic diagram showing the structure of a communication device provided in an embodiment of the present application is shown;

[0033] Fig.14 A schematic diagram showing the hardware structure of a terminal provided in an embodiment of the present application is shown;

[0034] Fig.15 A schematic diagram of the hardware structure of a network side device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0036] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0037] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0038] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in 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), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 th Generation, 6G) communication system.

[0039] Figure 1 A block diagram of a wireless communication system applicable to the embodiment of the present application is shown. The wireless communication system includes a relay terminal 11, a network side device 12 and a remote terminal 13. In the embodiment of the present application, the remote terminal 13 communicates with the relay terminal 11 via a PC5 (secondary link or side link) interface, and the relay terminal 11 communicates with the network side device 12 via a Uu interface.

[0040] Among them, the relay terminal 11 can also be called a relay terminal device or a relay user terminal (User Equipment, UE), the remote terminal 13 can also be called a remote terminal device or a remote UE, the relay terminal 11 and the remote terminal 13 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), a wearable device (Wearable Device) or a vehicle-mounted device (VUE), a pedestrian terminal (PUE) and other terminal side devices, and the wearable device includes: a bracelet, a headset, glasses, etc. It should be noted that the specific types of the relay terminal 11 and the remote terminal 13 are not limited in the embodiment of the present application. The network side device 12 can be a base station or a core network, wherein the base station can be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base TransceiverStation, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (Transmitting Receiving Point, TRP) or some other suitable term in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

[0041] The 5G New Radio (NR) system supports sidelink (also known as secondary link, side link or side link, etc.) transmission, that is, data is directly transmitted between terminals (User Equipment, UE) through the wireless interface. Sidelink transmission supports multiple transmission modes such as unicast, multicast or groupcast. Among them, Sidelink transmission mainly includes the following physical channels:

[0042] Physical sidelink control channel (PSCCH);

[0043] Physical sidelink shared channel (PSSCH);

[0044] Physical sidelink broadcast channel (PSBCH);

[0045] Physical sidelink discovery feedback channel (PSFCH).

[0046] In the related art, sidelink communication supports two resource allocation modes: Mode 1 is that the base station allocates SL resources to the terminal, and the UE uses the resources scheduled by the base station for sidelink transmission at the PC5 interface; Mode 2 is that the terminal selects SL resources from the resource pool on its own, and the resource pool information may come from the base station's dedicated signaling message, broadcast message or pre-configured information.

[0047] If the UE is within the range of the base station and has an RRC connection with the base station, the SL resource allocation mode can be determined by the base station as mode 1 or mode 2; if the UE is within the network coverage but has no RRC connection with the base station, it can only work in mode 2. If the UE is outside the range of the base station, it can only work in mode 2 and perform sidelink transmission according to the pre-configured information.

[0048] For mode 1, the base station can configure the scheduling request configuration corresponding to the two medium access control layer control elements (MAC CEs), namely, the sidelink channel state information report (Sidelink CSIReporting) and the sidelink discontinuous reception command (Sidelink DRX Command), for the UE, for example, the sl-CSI-SchedulingRequestId-r16 information element. When the UE needs to send the Sidelink CSI Reporting MAC CE or the Sidelink DRX Command MAC CE to the opposite UE, the UE can send the SR corresponding to the sl-CSI-SchedulingRequestId-r16 to the base station to request the base station to allocate (or schedule) the relevant SL resources.

[0049] In addition to the above, the base station can also configure the corresponding scheduling request configuration for the SL logical channel, namely sl-SchedulingRequestId-r16. When the SL buffer status report (Buffer Status Report, BSR) triggered by the arrival of SL data on the SL logical channel needs to be sent, the UE can send an SR of sl-SchedulingRequestId-r16 corresponding to the SL logical channel to the base station to request the base station to allocate (or schedule) related SL resources.

[0050] In SL transmission, in addition to positioning based on the reference signal of the Uu port (the wireless interface between the UE and the base station), there is also a need for positioning based on the PC5 port (the wireless interface between UE and UE) in scenarios such as Vehicle-to-Everything (V2X). For example, when the vehicle is out of the coverage of the mobile network, sidelink positioning may be required.

[0051] When performing sidelink positioning (SL positioning) based on the PC5 port, that is, measuring the Sidelink PRS of the PC5 port for positioning, the following roles can be involved:

[0052] 1. Target UE: The target UE to be positioned. Positioning requires obtaining the absolute position, relative position or ranging of the UE.

[0053] 2. Anchor UE: A UE that supports positioning of a target UE, for example, by sending and / or receiving a sidelink positioning reference signal (SL PRS) and providing positioning-related information.

[0054] For SL positioning, the following two architectures can be used:

[0055] Architecture 1: SL positioning based on location management function (LMF, also known as positioning server), that is, the positioning architecture based on Uu interface is used. The positioning server is responsible for controlling the execution of SL positioning. The difference is that SL positioning involves at least two UEs (one target UE and one or more anchor UEs). The UE measures the SL PRS sent by other UEs to achieve positioning. Among them, the sidelink positioning architecture based on LMF is as follows: Figure 2a Architecture 1 is only applicable to the scenario where the target UE and / or anchor UE are within the network coverage, and is not applicable to the scenario where both the target UE and anchor UE are outside the network coverage.

[0056] Architecture 2: SL positioning not based on (not related to) positioning server. For this architecture, communication network nodes may not be involved, and multiple UEs may interact to achieve positioning. This architecture may include the following two possible architectures:

[0057] Possible architecture 1: Positioning architecture based on positioning service UE, such as Figure 2b As shown;

[0058] Possible architecture 2: Positioning architecture without positioning service UE, such as Figure 2c shown.

[0059] Regardless of which of the above architectures, the basic principle of sidelink positioning is that the target UE sends SLPRS on the PC5 interface, and one or more anchor UEs perform positioning measurements on the SL PRS sent by the target UE to obtain positioning measurement results, or one or more anchor UEs send SL PRS on the PC5 interface, and the target UE performs positioning measurements on the SL PRS sent by the one or more anchor UEs to obtain positioning measurement results. The position of the target UE is calculated based on the positioning measurement results.

[0060] However, in the related art, no technical solution for how to perform SL-PRS transmission is provided. To address this problem, an embodiment of the present application provides a transmission solution for a sidelink positioning reference signal.

[0061] In the following, in combination with the accompanying drawings, the transmission scheme of the sidelink positioning reference signal provided in the embodiment of the present application is described in detail through some embodiments and their application scenarios.

[0062] Figure 3 A schematic diagram of a flow chart of a method for transmitting a sidelink positioning reference signal in an embodiment of the present application is shown. The method 300 may be executed by a terminal, for example, by the above Figure 2a-2c , or, Figure 2a-2c In other words, the method can be executed by software or hardware installed on the terminal. Figure 3 As shown, the method may include the following steps.

[0063] S310: The terminal determines that an SL PRS needs to be sent.

[0064] For example, after a medium access control layer (MAC) of the terminal receives an SL PRS transmission request from a sidelink positioning protocol layer or a physical layer of the terminal, the terminal determines that the SL PRS needs to be sent.

[0065] S312: The terminal sends a target request to the access network device, wherein the target request is used to request allocation of side link resources, and the side link resources are used to send the SL PRS.

[0066] For example, in one implementation, when the terminal is configured as side link resource allocation mode 1 (i.e., the above-mentioned mode 1, also referred to as side link resource allocation mechanism 1 (Scheme 1)) and does not send side link resources for SL PRS, the terminal can send the target request to the access network device.

[0067] The side link resource for which the SL PRS is not sent includes at least one of the following:

[0068] (1) There are no available side link resources for sending the SL PRS; for example, when the terminal needs to send the SL PRS, there are no available side link resources, or there are available side link resources but the size of the available side link resources is insufficient to transmit the SL PRS.

[0069] (2) There are no side link resources that meet the delay requirement for sending the SL PRS within a predetermined time period. For example, when the terminal needs to send an SL PRS, the terminal has sufficient side link resources to send the SL PRS after a period of time, but the period of time is too long and does not meet the delay requirement for sending the SL PRS.

[0070] S314, the terminal obtains the sidelink resource allocated to the terminal by the access network device.

[0071] After receiving the target request sent by the terminal, the access network device can know that the terminal needs to send SL PRS, but there is no side link resource for sending SL PRS. Therefore, the access network device can allocate side link resources for sending SL PRS for configuration.

[0072] S316: The terminal sends a SL PRS on the allocated side link resources.

[0073] After the terminal obtains the side link resource allocated by the access network device to the terminal, it can send SL PRS on the side link resource. Figure 2a to Figure 2c If the terminal is a target terminal in the sidelink resource, the terminal can broadcast or unicast the SL PRS on the sidelink resource, and one or more anchor UEs can perform positioning measurement on the SL PRS sent by the terminal to obtain the positioning measurement result of the terminal. Figure 2a to Figure 2cFor an anchor terminal, the terminal can unicast or broadcast the SL PRS on the sidelink resource, and the target terminal can perform positioning measurement on the SL PRS sent by the anchor terminal to obtain a positioning measurement result, and then calculate based on the positioning measurement result to obtain positioning information.

[0074] Through the above-mentioned technical solution provided in the embodiment of the present application, when the terminal determines that it is necessary to send SL PRS, it can send a target request for side link resources for requesting the transmission of SL PRS to the access network device, and then send SL PRS on the side link resources allocated by the access network device, thereby realizing the sending of SL PRS and further realizing SL positioning.

[0075] Figure 4 Another flow chart of a method for transmitting a sidelink positioning reference signal in an embodiment of the present application is shown. The method 400 can be executed by a terminal, for example, by the above Figure 2a-2c , or, Figure 2a-2c In other words, the method can be executed by software or hardware installed on the terminal. Figure 4 As shown, the method may include the following steps.

[0076] S410, the terminal receives first configuration information from the access network device, wherein the first configuration information includes configuration information of a first scheduling request (Scheduling Request, SR), and the first SR is used to request allocation of the side link resource.

[0077] In this embodiment, the access network device may send configuration information of the first SR to the terminal, wherein the first SR is associated with an SL PRS transmission resource request, that is, the first SR is used to request the access network device to allocate sidelink resources for sending the SL PRS.

[0078] S412: The terminal determines that an SL PRS needs to be sent.

[0079] This step is the same as the above S310, and the details can refer to the above description of S310.

[0080] S414: The terminal sends the first SR to the access network device based on the first configuration information.

[0081] In this embodiment, the target request includes the first SR. Through the first SR, the terminal requests the access network device to allocate a side link resource for sending the SL PRS.

[0082] Among them, the terminal can send the first SR to the access network device when it is configured as side link resource allocation mode 1 and does not send the side link resources of the SL PRS. For details, please refer to the above related description.

[0083] In one implementation, the configuration information of the first SR may include a scheduling request identifier of the first SR, and the scheduling request identifier is associated with an air interface resource configuration for sending the first SR. For example, the scheduling request identifier may correspond to a scheduling request resource configuration related to sending the first SR, and the scheduling request resource configuration may include corresponding physical uplink control channel (PUCCH) resources, cycles, offsets, etc. The terminal may determine the air interface resource configuration for sending the first SR based on the scheduling request identifier, thereby sending the first SR on resources corresponding to the air interface resource configuration.

[0084] In one implementation, the configuration information of the first SR is configured at a terminal granularity (per UE). That is, the access network device can configure only one SR for requesting SL PRS for a terminal. The configuration information of the first SR can be applicable to all SL PRS resource requests of the terminal, including SL PRS sent by unicast, multicast and broadcast, where unicast can include all PC5-RRC connections of the terminal.

[0085] In another implementation, the configuration information of the first SR can be configured with SL PRS resource pool (per SLPRS resource pool) as the granularity. That is, the access network device can configure different first SR configuration information for different SL PRS resource pools, wherein the SL PRS resource pool can be a SL PRS dedicated resource pool or a shared resource pool.

[0086] When the configuration information of the first SR is configured with the SL PRS resource pool as the granularity, when the terminal sends the first SR to the access network device, it can send the first SR corresponding to the target resource pool to the access network device based on the first configuration information, wherein the target resource pool is the resource pool corresponding to the SL PRS to be sent.

[0087] In one implementation, the scheduling request identifier of the first SR is a dedicated identifier, and is dedicated to identifying a scheduling request for requesting allocation of SL PRS transmission resources. For example, a new information element is introduced in the first SR, and the new information element is used to identify that the first SR is a scheduling request for requesting allocation of SL PRS transmission resources. For example, the new information element may be: schedulingRequestID-SL-PRS. Since it is a dedicated identifier, the access network device can know that the UE is requesting sidelink resources for SL PRS based on the dedicated identifier, so that sidelink resources of a suitable size that is more suitable for SL PRS transmission can be allocated.

[0088] Alternatively, in another implementation, the scheduling request identifier of the first SR is a non-dedicated identifier, and the scheduling request identifier of the first SR is used to identify scheduling requests for other purposes other than requesting to allocate SL PRS transmission resources in addition to identifying the scheduling request for requesting to allocate SL PRS transmission resources. For example, the scheduling request identifier of the first SR can reuse the sidelink CSI scheduling request identifier (sl-CSI-SchedulingRequestId), that is, the scheduling request identifier of the first SR is used to identify the SR of the sidelink CSI reporting (Sidelink CSI Reporting) MAC CE and the sidelink DRX command (Sidelink DRX Command) MAC CE in addition to identifying the scheduling request for requesting to allocate SL PRS transmission resources, or sl-CSI-SchedulingRequestId is applicable to Sidelink CSI Reporting MAC CE, Sidelink DRX Command MAC CE and SL PRS.

[0089] S416: The terminal obtains the sidelink resource allocated by the access network device to the terminal.

[0090] After receiving the first SR, the access network device can allocate sidelink resources for sending the SL PRS to the terminal. Optionally, when the configuration information of the first SR is per SL PRS resource pool configuration, the access network device can obtain the resource pool corresponding to the SL PRS based on the first SR, and allocate sidelink resources for sending the SL PRS on the resource pool to the terminal.

[0091] S418: The terminal sends the SL PRS on the allocated side link resources.

[0092] For example, the terminal may send the SLPRS on PC5 in a broadcast, multicast or unicast manner based on the allocated sidelink resources.

[0093] Through the technical solution provided in the embodiment of the present application, the terminal can send a first SR to the access network device when it needs to send SL PRS based on the first configuration information configured by the access network device, thereby obtaining side link resources for sending SL PRS and realizing the transmission of SL PRS.

[0094] Figure 5 Another flow chart of a method for transmitting a sidelink positioning reference signal in an embodiment of the present application is shown. The method 500 can be executed by a terminal, for example, by the above Figure 2a-2c , or, Figure 2a-2c In other words, the method can be executed by software or hardware installed on the terminal. Figure 5 As shown, the method may include the following steps.

[0095] S510, the terminal receives second configuration information from the access network device, wherein the second configuration information includes: configuration information of a second SR, the second SR is used to request allocation of air interface resources, and the air interface resources are used to send a target MACCE.

[0096] In this embodiment, the second SR is associated with the target MAC CE transmission request, that is, the second SR is used to request the access network device to allocate air interface resources for sending the target MAC CE, wherein the target MAC CE is used to request allocation of sidelink resources required for sending the SL PRS.

[0097] Optionally, the configuration information of the second SR includes a scheduling request identifier of the second SR, and the scheduling request identifier is associated with an air interface resource configuration for sending the second SR. For example, the scheduling request identifier (ID) of the second SR corresponds to a scheduling request resource configuration related to sending the second SR, and the scheduling request resource configuration may include corresponding PUCCH resources, period, offset, etc.

[0098] In one implementation, the scheduling request identifier of the second SR is a dedicated identifier, and is dedicated to identifying a scheduling request for requesting allocation of air interface resources for sending the target MAC CE. For example, a newly added information element. Since it is a dedicated identifier, the access network device can know based on the dedicated identifier that the UE is requesting air interface resources for the target MAC CE, so that an air interface resource of a suitable size that is more suitable for the target MAC CE can be allocated.

[0099] In another implementation, the scheduling request identifier of the second SR is a non-dedicated identifier, and the scheduling request identifier of the second SR is used to identify scheduling requests for other purposes other than requesting to allocate air interface resources for sending the target MAC CE in addition to identifying the scheduling request for requesting to allocate air interface resources for sending the target MAC CE. For example, the scheduling request identifier of the second SR can reuse other scheduling request IDs, such as schedulingRequestID-PosMG-Request-r17 used to identify the SR requesting to allocate air interface resources for Positioning Measurement Gap Activation / Deactivation Request MAC CE, that is, PositioningMeasurement Gap Activation / Deactivation Request MAC CE and target MAC CE share one SR, or schedulingRequestID-PosMG-Request-r17 is applicable to Positioning Measurement GapActivation / Deactivation Request MAC CE and target MAC CE.

[0100] S512: The terminal determines that an SL PRS needs to be sent.

[0101] Same as above S310, please refer to the above description about S310 for details.

[0102] S514: The terminal sends a target MAC CE to the access network device.

[0103] In this embodiment of the present application, the target MAC CE is a MAC CE dedicated to requesting allocation of side link resources for transmitting SL PRS, that is, the target MAC CE includes a MAC CE dedicated to requesting allocation of side link resources for sending SL PRS.

[0104] In this embodiment, the above-mentioned target request includes the target MAC CE.

[0105] For example, the terminal may send the target MAC CE to the access network device when the terminal is configured in sidelink resource allocation mode 1 and the sidelink resource of the SL PRS is not sent.

[0106] In one implementation, if the terminal has a first air interface resource available for sending the target MAC CE, the terminal may send the target MAC CE on the first air interface resource.

[0107] In another implementation, if the terminal has no air interface resources available to send the target MAC CE, the terminal may send the second SR to the access network device, obtain the second air interface resources allocated by the access network device for sending the target MAC CE, and then send the target MAC CE to the access network device through the second air interface resources.

[0108] Optionally, the target MAC CE may include at least one of the following information (that is, any combination of the following information):

[0109] (1) resource bandwidth information of the SL PRS;

[0110] (2) Resource pool information of the SL PRS;

[0111] (3) the transmission period of the SL PRS;

[0112] (4) the number of times the SL PRS is sent;

[0113] (5) Destination address information of the SL PRS.

[0114] Through the above information, the access network device can obtain relevant information of the SL PRS that the terminal needs to send, so as to allocate appropriate side link resources to the terminal.

[0115] S516: The terminal obtains the sidelink resource allocated by the access network device to the terminal.

[0116] After receiving the target MAC CE, the access network device can allocate side link resources for sending SL PRS to the terminal.

[0117] S518: The terminal sends the SL PRS on the allocated side link resources.

[0118] For example, the terminal may send the SLPRS on PC5 in a broadcast, multicast or unicast manner based on the allocated sidelink resources.

[0119] Through the technical solution provided in the embodiment of the present application, the terminal can send a target MAC CE to the access network device when it needs to send SL PRS based on the second configuration information configured by the access network device, thereby obtaining side link resources for sending SL PRS and realizing the transmission of SL PRS.

[0120] Figure 6 Another flow chart of a method for transmitting a sidelink positioning reference signal in an embodiment of the present application is shown. The method 600 can be executed by a terminal, for example, by the above Figure 2a-2c , or, Figure 2a-2c In other words, the method can be executed by software or hardware installed on the terminal. Figure 5 The difference of the illustrated method 500 is that the target MAC CE in the method 600 is a Sidelink Buffer Status Report (SL-BSR) MAC CE.

[0121] like Figure 6 As shown, the method may include the following steps.

[0122] S610, the terminal receives second configuration information from the access network device, wherein the second configuration information includes: configuration information of a second SR, the second SR is used to request allocation of air interface resources, and the air interface resources are used to send a target MACCE.

[0123] This step is the same as the above S510, and please refer to the above related description for details.

[0124] S612: The terminal receives a first message sent by the access network device, wherein the first message carries a target logical channel group identifier corresponding to the SLPRS.

[0125] For example, the access network device can send a first radio resource control (Radio Resource Control, RRC) message to the terminal. The first RRC message can carry the target logical channel group (Logical Channel Group, LCG) identifier (ID) corresponding to the SL PRS. The target LCG ID is dedicated to identifying the transmission of SL PRS. The target LCG ID can be a virtual LCG ID, that is, the target LCG ID will not be allocated to the logical channel for use.

[0126] Optionally, the first message may also carry a target transmission priority of the SL PRS. The target transmission priority is used to indicate the transmission priority of the SL PRS after the terminal receives the sidelink resource allocation.

[0127] Optionally, the access network device may send the first message based on the second message sent by the terminal. Therefore, in this optional implementation, before S612, the method may also include: the terminal sends a second message to the access network device, wherein the second message carries indication information for indicating the SL PRS transmission requirement. For example, the second message may be a second RRC message, and the second RRC message includes indication information, and the indication information is used to indicate the SL PRS transmission requirement. The second RRC message may be a sidelink UE information (Sidelink UE Information) or a UE assistant information (UEAssistant Information) message, or it may be a newly introduced message, which is not limited in this embodiment.

[0128] S614: The terminal determines that an SL PRS needs to be sent.

[0129] Same as above S310, please refer to the above description about S310 for details.

[0130] In the specific implementation process, there is no necessary order between S614 and S612. For example, the access network device can send the first message to the terminal when sending the second configuration information to the terminal, and then the terminal determines that the SL PRS needs to be sent. Alternatively, after receiving the second configuration information, the terminal determines that the SL PRS needs to be sent, and then sends the second message to the access network device, and the access network device sends the first message after receiving the second message. Alternatively, after receiving the second configuration information, the terminal sends the second message to the access network device, and the access network device sends the first message after receiving the second message, and then the terminal determines that the SL PRS needs to be sent.

[0131] S616: The terminal sends a SL-BSR MAC CE to the access network device, wherein the value of the logical channel group identifier field in the SL-BSR MAC CE is the target logical channel group identifier.

[0132] In this embodiment, the target MAC CE includes the SL-BSR MAC CE. The LCG ID in the SL-BSR MAC CE is the target LCG ID corresponding to the SL PRS.

[0133] In this embodiment, the value of the buffer size field in the target MAC CE is the equivalent sidelink data size converted by the SL PRS.

[0134] Alternatively, the buffer size field in the target MAC CE is used to indicate the transmission information of the SL PRS. That is, when the LCG ID is the LCG ID corresponding to the SL PRS, its corresponding buffer size is no longer used to indicate the buffer size, but is used to indicate the SL PRS transmission information.

[0135] Optionally, the transmission information of the SL PRS includes at least one of the following (that is, it can be any combination of the following information):

[0136] (1) resource bandwidth information of the SL PRS;

[0137] (2) Resource pool information of the SL PRS;

[0138] (3) the transmission period of the SL PRS;

[0139] (4) the number of times the SL PRS is sent;

[0140] (5) Destination address information of the SL PRS.

[0141] Through the above-mentioned SL PRS transmission information, the access network device can obtain relevant information of the SL PRS to be transmitted by the terminal, so as to allocate appropriate side link resources for the transmission of the SL PRS.

[0142] S618: The terminal obtains the sidelink resource allocated by the access network device to the terminal.

[0143] After receiving the SL-BSR MAC CE, the access network device can allocate side link resources for sending the SL PRS to the terminal because the LCG ID of the SL-BSR MAC CE is the target LCG ID corresponding to the SLPRS.

[0144] S620: The terminal sends the SL PRS on the allocated side link resources.

[0145] For example, the terminal may send the SLPRS on PC5 in a broadcast, multicast or unicast manner based on the allocated sidelink resources.

[0146] Optionally, in a case where the first message carries a target transmission priority corresponding to the SL PRS, the terminal may transmit the SL PRS on the side link resources according to the target transmission priority.

[0147] Through the technical solution provided in the embodiment of the present application, the terminal can send the SL-BSR MAC CE to the access network device when it needs to send the SL PRS based on the second configuration information configured by the access network device, thereby obtaining the side link resources for sending the SL PRS and realizing the transmission of the SL PRS.

[0148] Figure 7 A flow chart of a method for allocating sidelink resources provided in an embodiment of the present application is shown. The method 700 can be executed by an access network device. In other words, the method can be executed by software or hardware installed on the access network device. Figure 7 As shown, the method may include the following steps.

[0149] S710: An access network device receives a target request sent by a terminal, wherein the target request is used to request allocation of side link resources, and the side link resources are used to send the SL PRS.

[0150] Among them, the terminal can use the above Figures 3 to 6 The target request is sent to the access network device in the manner described in any of the methods. For details, please refer to the above related description and will not be repeated here.

[0151] S712: The access network device allocates side link resources for the terminal to send the SL PRS.

[0152] In an embodiment of the present application, when the access network device receives a target request for requesting allocation of side link resources for sending SL PRS, it allocates side link resources for sending SL PRS to the terminal, so that the terminal can send SL PRS on the side link resources, thereby realizing SL positioning.

[0153] In one implementation, the target request includes a first scheduling request SR, and the first SR is used to request the allocation of the side link resource. Then in an implementation, before the access network device receives the target request sent by the terminal, the method may also include: the access network device sends first configuration information to the terminal, and the first configuration information includes configuration information of the first SR.

[0154] In one implementation, the configuration information of the first SR may include a scheduling request identifier of the first SR, and the scheduling request identifier is associated with an air interface resource configuration for sending the first SR.

[0155] In one implementation, the configuration information of the first SR may be configured at a terminal granularity.

[0156] In another implementation, the configuration information of the first SR may be configured at the granularity of the SL PRS resource pool. Then the access network device allocating the side link resources for the SL PRS transmission to the terminal may include: the access network device allocating the side link resources for the SL PRS transmission to the terminal from the target resource pool corresponding to the first SR.

[0157] In one implementation, the scheduling request identifier of the first SR may be a dedicated identifier, and is dedicated to identifying a scheduling request for requesting allocation of SL PRS transmission resources.

[0158] In another implementation, the scheduling request identifier of the first SR is a non-dedicated identifier, and in addition to being used to identify the scheduling request for requesting allocation of SL PRS transmission resources, the scheduling request identifier of the first SR is also used to identify scheduling requests for other purposes except requesting allocation of SL PRS transmission resources.

[0159] In one implementation, the target request includes a target MAC CE, and the target MAC CE is used to request allocation of the side link resource.

[0160] In the above implementation, optionally, before S710, the method may further include: the access network device sends second configuration information to the terminal, wherein the second configuration information includes: configuration information of a second SR, the second SR is used to request allocation of air interface resources, and the air interface resources are used to send the target MAC CE.

[0161] Optionally, the configuration information of the second SR includes a scheduling request identifier of the second SR, and the scheduling request identifier is associated with an air interface resource configuration used to send the second SR.

[0162] In one implementation, the scheduling request identifier of the second SR is a dedicated identifier, and is dedicated to identifying a scheduling request for requesting allocation of air interface resources for sending the target MAC CE.

[0163] In another implementation, the scheduling request identifier of the second SR is a non-dedicated identifier, and in addition to being used to identify the scheduling request requesting the allocation of air interface resources for sending the target MAC CE, the scheduling request identifier of the second SR is also used to identify scheduling requests for other purposes other than requesting the allocation of air interface resources for sending the target MAC CE.

[0164] In one implementation, the access network device receiving the target request sent by the terminal may include:

[0165] The access network device receives the target MAC CE sent by the terminal on a first air interface resource that is available for sending the target MAC CE; or,

[0166] The access network device sends the second SR to the terminal, allocates a second air interface resource for sending the target MAC CE to the terminal, and receives the target MAC CE sent by the terminal on the second air interface resource.

[0167] In one implementation, the target MAC CE includes a MAC CE dedicated to requesting allocation of the sidelink resource.

[0168] In the above implementation, the target MAC CE may include at least one of the following information (that is, any combination of the following information):

[0169] Resource bandwidth information of the SL PRS;

[0170] Resource pool information of the SL PRS;

[0171] The transmission period of the SL PRS;

[0172] The number of times the SL PRS is sent;

[0173] The destination address information of the SL PRS.

[0174] In another implementation, the target MAC CE includes a sidelink buffer status report MAC CE.

[0175] In the above implementation, optionally, the access network device receiving the target request sent by the terminal may include the following steps:

[0176] Step 1: The access network device sends a first message to the terminal, wherein the first message carries a target logical channel group identifier corresponding to the SL PRS;

[0177] Step 2: The access network device receives the target MAC CE sent by the terminal, wherein the value of the logical channel group identifier field in the target MAC CE is the target logical channel group identifier.

[0178] Optionally, the first message may also carry a target transmission priority corresponding to the SL PRS.

[0179] Optionally, before the access network device receives the target request sent by the terminal, the method may further include: the access network device receives a second message sent by the terminal, wherein the second message carries indication information for indicating SLPRS transmission requirements.

[0180] Optionally, when the target MAC CE is a side link cache status report MAC CE, the value of the cache size field in the target MAC CE is the equivalent side link data size converted by the SL PRS; or, the cache size field in the target MAC CE is used to indicate the transmission information of the SL PRS.

[0181] Optionally, the transmission information of the SL PRS includes at least one of the following (that is, it can be any combination of the following information):

[0182] Resource bandwidth information of the SL PRS;

[0183] Resource pool information of the SL PRS;

[0184] The transmission period of the SL PRS;

[0185] The number of times the SL PRS is sent;

[0186] The destination address information of the SL PRS.

[0187] Through the above technical solution provided in the embodiment of the present application, the access network device can allocate side link resources for transmitting SLPRS to the terminal, so that the terminal can transmit SL PRS on the side link resources to achieve SL positioning.

[0188] Figure 8 Another flow chart of the SL PRS transmission method provided in an embodiment of the present application is shown. The method 800 can be executed by terminal 1 (UE1) and a base station.

[0189] In an embodiment, the base station sends configuration information of a first SR to UE1, and the first SR is associated with a SL PRS transmission resource request, that is, the first SR is used to request the base station to allocate sidelink resources for sending SL PRS. When UE1 needs to send SL PRS but there are no available resources, UE1 sends a first SR to the base station to request the base station to allocate sidelink resources for sending SL PRS. The base station allocates sidelink resources for sending SL PRS to UE1 based on the first SR. UE1 unicasts, multicasts, or broadcasts SL PRS on PC5 port based on the sidelink resources allocated by the base station. Figure 8 As shown, the method mainly includes the following steps.

[0190] S801, the base station sends configuration information of a first SR to UE1, where the first SR is associated with a SL PRS transmission resource request, or in other words, the first SR is used to request the base station to allocate sidelink resources for sending the SL PRS.

[0191] Optionally, the configuration information of the first SR may include a scheduling request ID, which corresponds to a related scheduling request resource configuration. The scheduling request resource configuration may include corresponding PUCCH resources, period and offset, etc.

[0192] Optionally, the configuration information of the first SR is per UE configuration, that is, only one SR for requesting SLPRS is configured for a UE. The first SR configuration is applicable to all SL PRS resource requests of the UE, including SLPRS sent by unicast, multicast and broadcast, where unicast includes all PC5-RRC connections of the UE.

[0193] Optionally, the configuration information of the first SR may also be configured per SL PRS resource pool, that is, the base station may configure different SR configurations for different SL PRS resource pools, wherein the SL PRS resource pool may be a SL PRS dedicated resource pool or a shared resource pool.

[0194] Optionally, the scheduling request ID of the first SR can be an SR dedicated to requesting allocation of SL PRS transmission resources, such as introducing a new information element schedulingRequestID-SL-PRS, or reusing the identifier of other SRs, for example, sl-CSI-SchedulingRequestId, that is, Sidelink CSI Reporting MAC CE, Sidelink DRX CommandMAC CE and SL PRS share one SR, or sl-CSI-SchedulingRequestId is applicable to Sidelink CSIReporting MAC CE, Sidelink DRX Command MAC CE and SL PRS.

[0195] Optionally, when the base station configures UE1 to use sidelink resource allocation mode 1, the base station may send configuration information of the first SR to UE1.

[0196] S802: When the terminal is configured in side link resource allocation mode 1, it is determined that a SL PRS needs to be sent and a side link resource for sending the SL PRS is not provided.

[0197] This step is an optional step. The terminal may also directly execute S803 when determining that the SL PRS needs to be sent.

[0198] Optionally, the side link resources on which the SL PRS is not sent may include: no available resources (including no resources of sufficient size) for transmitting the SL PRS.

[0199] Optionally, the side link resources for which the SL PRS is not sent may include: sufficient available resources after a period of time, and the delay requirement for sending the SL PRS is not met during this period of time.

[0200] S803, UE1 sends a first SR to the base station, to request the base station to allocate sidelink resources for sending SL PRS.

[0201] Optionally, the first SR is an SR corresponding to the resource pool of the SL PRS. That is, UE1 sends the first SR using the SR configuration corresponding to the resource pool corresponding to the SL PRS.

[0202] Optionally, after receiving a SL PRS transmission request from a sidelink positioning protocol (Sidelink Positioning Protocol, SLPP) layer or a physical layer, the MAC layer of the UE may determine that an SL PRS needs to be sent, and send a first SR to the base station.

[0203] UE1 may participate in multiple sidelink positioning concurrently and needs to send SLPRS to multiple destinations. Optionally, for each destination (ie, sending SL PRS to multiple destinations), each destination maintains a corresponding pending SR and its own sr-ProhibitTimer.

[0204] S804: The base station receives the first SR, and the base station determines, based on the first SR, to allocate side link resources for the UE to send the SL PRS.

[0205] Optionally, when the configuration information of the first SR is per SL PRS resource pool configuration, the base station learns the resource pool corresponding to the SL PRS based on the first SR, and the base station allocates a sidelink resource for sending the SL PRS on the resource pool for the UE;

[0206] S805: The base station allocates side link resources for sending SL-PRS to the UE.

[0207] S806, UE1 sends SL PRS on the allocated sidelink resources, which may be sent by broadcast, multicast or unicast (for example, to UE2).

[0208] Through the method of this embodiment, UE1 sends the first SR to the base station when it needs to send SL PRS based on the first SR configuration configured by the base station, thereby obtaining the sidelink resources for sending SL PRS and realizing the transmission of SL PRS.

[0209] Fig. 9 Another flow chart of the SL PRS transmission method provided in an embodiment of the present application is shown. The method 900 can be executed by terminal 1 (UE1) and a base station.

[0210] In this method, the base station can send configuration information of the second SR to UE1, and the second SR is associated with the target MAC CE transmission request, that is, the second SR is used to request the base station to allocate air interface resources for sending the target MAC CE, wherein the target MAC CE is used to request allocation of sidelink resources required for SL PRS transmission. When UE1 needs to send SL PRS but there are no available sidelink resources, if the Uu interface has available resources to send the target MAC CE, the target MAC CE is directly sent to the base station; if the Uu interface has no available resources to send the target MAC CE, UE1 sends a second SR to request the base station to allocate resources for sending the target MAC CE. After receiving the scheduling, UE1 sends the target MAC CE to the base station, thereby obtaining the sidelink resources for sending SL PRS. Fig. 9 As shown, the method mainly includes the following steps.

[0211] S901, the base station sends the configuration information of the second SR to UE1, and the second SR is associated with the target MAC CE transmission request, that is, the second SR is used to request the base station to allocate air interface resources for sending the target MAC CE, wherein the target MAC CE is used to request allocation of sidelink resources required for SL PRS transmission.

[0212] The configuration information of the second SR may include a scheduling request ID, which corresponds to a related scheduling request resource configuration, and the scheduling request resource configuration may include corresponding PUCCH resources, period, offset, and the like.

[0213] Optionally, the second SR (scheduling request ID) may be an SR dedicated to requesting allocation of air interface resources for sending the target MAC CE. It may also be a non-dedicated scheduling request ID, such as schedulingRequestID-PosMG-Request-r17 applicable to Positioning Measurement GapActivation / Deactivation Request MAC CE, that is, Positioning Measurement Gap Activation / Deactivation Request MAC CE and target MAC CE share one SR, or schedulingRequestID-PosMG-Request-r17 is applicable to Positioning Measurement Gap Activation / Deactivation Request MAC CE and target MAC CE.

[0214] Optionally, when the base station configures UE1 to use sidelink resource allocation mode 1, the base station sends configuration information of the second SR to UE1.

[0215] S902, UE1 determines that it needs to send SL PRS but there are no available sidelink resources. If the Uu interface has available resources to send the target MAC CE, execute S906; if the Uu interface has no available resources to send the target MAC CE, execute S903.

[0216] Optionally, the MAC layer of the UE determines that the SL PRS needs to be sent after receiving the SL PRS transmission request from the SLPP (Sidelink Positioning Protocol) layer or the physical layer.

[0217] S903, UE1 sends a second SR to the base station, to request the base station to allocate air interface resources for sending the target MAC CE.

[0218] S904: The base station determines, based on the second SR, air interface resources allocated to UE1 for sending the target MAC CE.

[0219] S905: The base station allocates air interface resources for sending a target MAC CE to the UE.

[0220] S906, UE1 sends a target MAC CE to the base station, where the target MAC CE is used to request the base station to allocate sidelink resources required for SL PRS transmission.

[0221] S907: The base station determines, based on the target MAC CE, to allocate side link resources for UE1 to send SL PRS.

[0222] S908: The base station allocates sidelink resources to UE1.

[0223] S909, UE1 sends SL PRS on the allocated sidelink resources, which can be broadcast, multicast or unicast (for example, to UE2).

[0224] In a specific application, in one implementation, the target MAC CE may be a MAC CE dedicated to requesting the allocation of the sidelink resource, that is, the target MAC CE is a newly introduced MAC CE for requesting the sidelink resource for SL PRS transmission, for example, it is called Sidelink PRS Transmission MAC CE, and the target MAC CE may carry a combination of any of the following information:

[0225] (1) SL PRS resource bandwidth information, such as the number of RBs (Resource Blocks);

[0226] (2) SL PRS resource pool information;

[0227] (3) The transmission period of SL PRS;

[0228] (4) Number of times SL PRS is sent;

[0229] (5)Destination information.

[0230] In another implementation, the target MAC CE may also be a SL-BRS MAC CE. The structure of the SL-BRS MAC CE is as follows: Fig.10a As shown, since SL PRS is a physical layer reference signal, there is no corresponding LCG. In addition, SLPRS does not have a buffer size like sidelink data. In order to adapt to SL-BSR, the base station can allocate an LCG ID for SL PRS (that is, SL PRS corresponds to a virtual LCG ID), and optionally, also allocate a transmission priority corresponding to the LCG ID. The transmission priority is used to determine the transmission priority of SL PRS after receiving the sidelink resource allocation.

[0231] Therefore, if Fig.10b As shown, in this implementation, before UE1 sends the target MAC CE to the base station, the following steps may also be included:

[0232] S1001, UE1 sends a second RRC message to a base station, the second RRC message including indication information, the indication information being used to indicate a SL PRS transmission requirement. The second RRC message may be a Sidelink UE Information or UE Assistant Information message, or may be a newly introduced message. This step is optional.

[0233] S1002: The base station sends a first RRC message to UE1, the first RRC message includes the LCG ID corresponding to the SL PRS, and optionally, the second RRC message also includes the transmission priority of the SL PRS. Optionally, the base station sends a second RRC message based on the first RRC message.

[0234] The base station will not allocate the LCG ID corresponding to the SL PRS to the logical channel for use.

[0235] The step of UE1 sending the target MAC CE to the base station may include S1004.

[0236] S1003, UE1 sends a SL-BSR MAC CE to the base station, and one of the LCG IDs in the MAC CE is the LCG ID corresponding to the SL PRS. The Buffer Size corresponding to the SL PRS in the SL-BSR can be the equivalent SL data size converted by the SL PRS, or when the LCG ID is the LCG ID corresponding to the SL PRS, its corresponding buffer size is no longer used to indicate the buffer size, but is used to indicate the SL PRS transmission information, and the SL PRS transmission information can be any combination of the following information:

[0237] (1) SL PRS resource bandwidth information, such as the number of RBs (Resource Blocks);

[0238] (2) SL PRS resource pool information;

[0239] (3) The transmission period of SL PRS;

[0240] (4) Number of times SL PRS is sent;

[0241] (5)Destination information.

[0242] The step of the base station determining, based on the target MAC CE, that the side link resources for sending the SL PRS be allocated to UE1 may include S1004.

[0243] S1004, the base station receives the SL-BSR MAC CE. If the LCG ID corresponds to the LCG ID of the SL PRS, the base station learns that sidelink resources need to be allocated for the SL PRS. The base station uses the buffer size field in the MAC CE as the SL data size equivalent to the SL PRS, or as the above-mentioned SL PRS transmission information, and allocates sidelink resources of appropriate size to UE1 accordingly.

[0244] Through the above-mentioned technical method provided in the embodiment of the present application, the UE in sidelink resource allocation mode 1 can timely and effectively request the sidelink resources for SL PRS transmission from the base station, thereby transmitting the SL PRS.

[0245] The transmission method of the sidelink positioning reference signal provided in the embodiment of the present application can be performed by a transmission device of the sidelink positioning reference signal. In the embodiment of the present application, the transmission method of the sidelink positioning reference signal performed by the transmission device of the sidelink positioning reference signal is taken as an example to illustrate the transmission device of the sidelink positioning reference signal provided in the embodiment of the present application.

[0246] Fig.11 A schematic diagram showing a structure of a transmission device for a sidelink positioning reference signal provided in an embodiment of the present application is shown. Fig.11 As shown, the device 1100 mainly includes: a determination module 1101, a first transmission module 1102 and an acquisition module 1103.

[0247] In an embodiment of the present application, a determination module 1101 is used to determine that an SL PRS needs to be sent; a first transmission module 1102 is used to send a target request to an access network device, wherein the target request is used to request allocation of side-link resources, and the side-link resources are used to send the SL PRS; an acquisition module 1103 is used to acquire the side-link resources allocated by the access network device to the terminal; the first transmission module 1102 is also used to send the SL PRS on the allocated side-link resources.

[0248] In one implementation, sending the target request to the access network device includes:

[0249] When the side link resource allocation mode 1 is configured and the side link resource of the SL PRS is not sent, the target request is sent to the access network device.

[0250] In one implementation, the side link resource that does not send the SL PRS includes at least one of the following:

[0251] There are no available sidelink resources for the SL PRS transmission;

[0252] There are no side link resources that meet the delay requirement for sending the SL PRS within a predetermined time period.

[0253] In one implementation, the target request includes a first scheduling request SR, where the first SR is used to request allocation of the side link resource;

[0254] In one implementation, the first transmission module 1102 is further configured to: receive first configuration information from the access network device, where the first configuration information includes configuration information of the first SR;

[0255] Sending a target request to an access network device includes: sending the first SR to the access network device based on the first configuration information.

[0256] In one implementation, the configuration information of the first SR includes a scheduling request identifier of the first SR, and the scheduling request identifier is associated with an air interface resource configuration for sending the first SR.

[0257] In one implementation, the configuration information of the first SR is configured based on the granularity of the terminal.

[0258] In one implementation, the configuration information of the first SR is configured with the SL PRS resource pool as the granularity;

[0259] Among them, based on the first configuration information, sending the first SR to the access network device includes: based on the first configuration information, sending the first SR corresponding to the target resource pool to the access network device, the target resource pool corresponds to the SL PRS, that is, the side link resources for sending the SL PRS are the resources in the target resource pool.

[0260] In one implementation, the scheduling request identifier of the first SR is a dedicated identifier, and is dedicated to identifying a scheduling request for requesting allocation of SL PRS transmission resources; or,

[0261] The scheduling request identifier of the first SR is a non-dedicated identifier. In addition to being used to identify the scheduling request for requesting allocation of SL PRS transmission resources, the scheduling request identifier of the first SR is also used to identify scheduling requests for other purposes except requesting allocation of SL PRS transmission resources.

[0262] In one implementation, the target request includes a target MAC CE, and the target MAC CE is used to request allocation of the side link resource.

[0263] In one implementation, the first transmission module 1102 is also used to receive second configuration information from the access network device, wherein the second configuration information includes: configuration information of a second SR, the second SR is used to request allocation of air interface resources, and the air interface resources are used to send the target MAC CE.

[0264] In one implementation, the configuration information of the second SR includes a scheduling request identifier of the second SR, and the scheduling request identifier is associated with an air interface resource configuration for sending the second SR.

[0265] In one implementation, the scheduling request identifier of the second SR is a dedicated identifier, and is dedicated to identifying a scheduling request for requesting allocation of air interface resources for sending the target MAC CE; or,

[0266] The scheduling request identifier of the second SR is a non-dedicated identifier. In addition to being used to identify the scheduling request requesting the allocation of air interface resources for sending the target MAC CE, the scheduling request identifier of the second SR is also used to identify scheduling requests for other purposes besides requesting the allocation of air interface resources for sending the target MAC CE.

[0267] In one implementation, sending the target request to the access network device includes:

[0268] In a case where there is a first air interface resource available for sending the target MAC CE, sending the target MAC CE to the access network device on the first air interface resource; or,

[0269] In the absence of a first air interface resource available for sending the target MAC CE, the second SR is sent to the access network device, and a second air interface resource allocated by the access network device for sending the target MAC CE is obtained, and the target MAC CE is sent to the access network device through the second air interface resource.

[0270] In one implementation, the target MAC CE includes a MAC CE dedicated to requesting allocation of the sidelink resource.

[0271] In one implementation, the target MAC CE includes at least one of the following information (that is, it can be any combination of the following information):

[0272] Resource bandwidth information of the SL PRS;

[0273] Resource pool information of the SL PRS;

[0274] The transmission period of the SL PRS;

[0275] The number of times the SL PRS is sent;

[0276] The destination address information of the SL PRS.

[0277] In one implementation, the target MAC CE includes a sidelink buffer status report MAC CE.

[0278] In one implementation, the first transmission module 1102 is also used to: receive a first message sent by the access network device, wherein the first message carries a target logical channel group identifier corresponding to the SL PRS; send the target request to the access network device, including: sending the target MAC CE to the access network device, wherein the value of the logical channel group identifier field in the target MAC CE is the target logical channel group identifier.

[0279] In one implementation, the first message also carries a target transmission priority corresponding to the SL PRS.

[0280] In one implementation, the first transmission module 1102 is further used to send a second message to the access network device, wherein the second message carries indication information for indicating SL PRS transmission requirements.

[0281] In one implementation, the value of the buffer size field in the target MAC CE is the equivalent sidelink data size converted by the SL PRS; or, the buffer size field in the target MAC CE is used to indicate the transmission information of the SL PRS.

[0282] In one implementation, the transmission information of the SL PRS includes at least one of the following (that is, it can be any combination of the following information):

[0283] Resource bandwidth information of the SL PRS;

[0284] Resource pool information of the SL PRS;

[0285] The transmission period of the SL PRS;

[0286] The number of times the SL PRS is sent;

[0287] The destination address information of the SL PRS.

[0288] In one implementation, determining that a sidelink positioning reference signal SL PRS needs to be sent includes:

[0289] After the media access control layer receives the SL PRS transmission request from the sidelink positioning protocol layer or the physical layer of the terminal, it determines that the SL PRS needs to be sent.

[0290] The transmission device of the sidelink positioning reference signal in the embodiment of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or it can be a device other than a terminal. Exemplarily, the terminal can include but is not limited to the types of terminals 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0291] The transmission device of the sidelink positioning reference signal provided in the embodiment of the present application can realize Figures 3 to 9 The various processes implemented by the terminal of the method embodiment achieve the same technical effect. To avoid repetition, they will not be described here.

[0292] Fig.12 A schematic diagram of the structure of a device for allocating sidelink resources provided in an embodiment of the present application is shown. Fig.12 As shown, the device 1200 mainly includes: a second transmission module 1201 and a distribution module 1202.

[0293] In an embodiment of the present application, the second transmission module 1201 is used to receive a target request sent by a terminal, wherein the target request is used to request the allocation of side link resources, and the side link resources are used for sending the SL PRS; the allocation module 1202 is used to allocate side link resources for the terminal for sending the SL PRS.

[0294] In one implementation, the target request includes a first scheduling request SR, and the first SR is used to request the allocation of the side link resources; wherein the second transmission module 1201 is also used to send first configuration information to the terminal, and the first configuration information includes configuration information of the first SR.

[0295] In one implementation, the configuration information of the first SR includes a scheduling request identifier of the first SR, and the scheduling request identifier is associated with an air interface resource configuration for sending the first SR.

[0296] In one implementation, the configuration information of the first SR is configured based on the granularity of the terminal.

[0297] In one implementation, the configuration information of the first SR is configured with the SL PRS resource pool as the granularity;

[0298] The allocating the side link resources for sending the SL PRS to the terminal includes: allocating the side link resources for sending the SL PRS to the terminal from a target resource pool corresponding to the first SR.

[0299] In one implementation, the scheduling request identifier of the first SR is a dedicated identifier, and is dedicated to identifying a scheduling request for requesting allocation of SL PRS transmission resources; or,

[0300] The scheduling request identifier of the first SR is a non-dedicated identifier. In addition to being used to identify the scheduling request for requesting allocation of SL PRS transmission resources, the scheduling request identifier of the first SR is also used to identify scheduling requests for other purposes except requesting allocation of SL PRS transmission resources.

[0301] In one implementation, the target request includes a target media access control layer MAC control element CE, and the target MAC CE is used to request allocation of the side link resource.

[0302] In one implementation, the second transmission module 1201 is further used to send second configuration information to the terminal, wherein the second configuration information includes: configuration information of a second SR, the second SR is used to request allocation of air interface resources, and the air interface resources are used to send the target MAC CE.

[0303] In one implementation, the configuration information of the second SR includes a scheduling request identifier of the second SR, and the scheduling request identifier is associated with an air interface resource configuration for sending the second SR.

[0304] In one implementation, the scheduling request identifier of the second SR is a dedicated identifier, and is dedicated to identifying a scheduling request for requesting allocation of air interface resources for sending the target MAC CE; or,

[0305] The scheduling request identifier of the second SR is a non-dedicated identifier. In addition to being used to identify the scheduling request requesting the allocation of air interface resources for sending the target MAC CE, the scheduling request identifier of the second SR is also used to identify scheduling requests for other purposes besides requesting the allocation of air interface resources for sending the target MAC CE.

[0306] In one implementation, receiving a target request sent by a terminal includes:

[0307] receiving the target MAC CE sent by the terminal on a first air interface resource available for sending the target MAC CE; or,

[0308] The second SR sent to the terminal allocates a second air interface resource for sending the target MAC CE to the terminal, and receives the target MAC CE sent by the terminal on the second air interface resource.

[0309] In one implementation, the target MAC CE includes a MAC CE dedicated to requesting allocation of the sidelink resource.

[0310] In one implementation, the target MAC CE includes at least one of the following information (that is, it can be any combination of the following information):

[0311] Resource bandwidth information of the SL PRS;

[0312] Resource pool information of the SL PRS;

[0313] The transmission period of the SL PRS;

[0314] The number of times the SL PRS is sent;

[0315] The destination address information of the SL PRS.

[0316] In one implementation, the target MAC CE includes a sidelink buffer status report MAC CE.

[0317] In one implementation, receiving a target request sent by a terminal includes:

[0318] Sending a first message to the terminal, wherein the first message carries a target logical channel group identifier corresponding to the SL PRS;

[0319] The target MAC CE sent by the terminal is received, wherein a value of a logical channel group identifier field in the target MAC CE is the target logical channel group identifier.

[0320] In one implementation, the first message also carries a target transmission priority corresponding to the SL PRS.

[0321] In one implementation, the second transmission module 1201 is further used to receive a second message sent by the terminal, wherein the second message carries indication information for indicating SL PRS transmission requirements.

[0322] In one implementation, the value of the buffer size field in the target MAC CE is the equivalent sidelink data size converted by the SL PRS; or, the buffer size field in the target MAC CE is used to indicate the transmission information of the SL PRS.

[0323] In one implementation, the transmission information of the SL PRS includes at least one of the following (that is, it can be any combination of the following information):

[0324] Resource bandwidth information of the SL PRS;

[0325] Resource pool information of the SL PRS;

[0326] The transmission period of the SL PRS;

[0327] The number of times the SL PRS is sent;

[0328] The destination address information of the SL PRS.

[0329] The side link resource allocation device provided in the embodiment of the present application can achieve Figures 3 to 9 In the method embodiment, the access network device or the base station implements each process and achieves the same technical effect. To avoid repetition, they are not described here.

[0330] like Fig.13 As shown, the embodiment of the present application further provides a communication device 1300, including a processor 1301 and a memory 1302, and the memory 1302 stores a program or instruction that can be run on the processor 1301. For example, when the communication device 1300 is a terminal, the program or instruction is executed by the processor 1301 to implement the various steps of the above-mentioned SL PRS transmission method embodiment, and can achieve the same technical effect. When the communication device 1300 is a network side device, the program or instruction is executed by the processor 1301 to implement the various steps of the above-mentioned side link resource allocation method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0331] The embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figures 3 to 6 The steps in the method embodiment shown. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Fig.14 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0332] The terminal 1400 includes but is not limited to: a radio frequency unit 1401, a network module 1402, an audio output unit 1403, an input unit 1404, a sensor 1405, a display unit 1406, a user input unit 1407, an interface unit 1408, a memory 1409 and at least some of the components of the processor 1410.

[0333] Those skilled in the art will appreciate that the terminal 1400 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 1410 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.14 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0334] It should be understood that in the embodiment of the present application, the input unit 1404 may include a graphics processing unit (GPU) 14041 and a microphone 14042, and the graphics processing unit 14041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1406 may include a display panel 14061, and the display panel 14061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1407 includes a touch panel 14071 and at least one of other input devices 14072. The touch panel 14071 is also called a touch screen. The touch panel 14071 may include two parts: a touch detection device and a touch controller. Other input devices 14072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0335] In the embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 1401 can transmit the data to the processor 1410 for processing; in addition, the radio frequency unit 1401 can send uplink data to the network side device. Generally, the radio frequency unit 1401 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0336] The memory 1409 can be used to store software programs or instructions and various data. The memory 1409 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1409 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1409 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0337] The processor 1410 may include one or more processing units; optionally, the processor 1410 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1410.

[0338] The processor 1410 is configured to determine that an SL PRS needs to be sent;

[0339] The radio frequency unit 1401 is configured to send a target request to an access network device, wherein the target request is used to request allocation of a side link resource, and the side link resource is used to send the SL PRS;

[0340] The processor 1410 is further configured to obtain a sidelink resource allocated by the access network device to the terminal;

[0341] The radio frequency unit 1401 is further configured to send the SL PRS on the allocated side link resources.

[0342] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of method embodiments 300-600, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0343] The embodiment of the present application also provides a network side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figure 7 The steps of the method embodiment shown. This network side device embodiment corresponds to the above network side device method embodiment, and each implementation process and implementation mode of the above method embodiment can be applied to this network side device embodiment and can achieve the same technical effect.

[0344] Specifically, the embodiment of the present application also provides a network side device. Fig.15 As shown, the network side device 1500 includes: an antenna 1501, a radio frequency device 1502, a baseband device 1503, a processor 1504 and a memory 1505. The antenna 1501 is connected to the radio frequency device 1502. In the uplink direction, the radio frequency device 1502 receives information through the antenna 1501 and sends the received information to the baseband device 1503 for processing. In the downlink direction, the baseband device 1503 processes the information to be sent and sends it to the radio frequency device 1502. The radio frequency device 1502 processes the received information and sends it out through the antenna 1501.

[0345] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1503, which includes a baseband processor.

[0346] The baseband device 1503 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.15 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 1505 through a bus interface to call the program in the memory 1505 to execute the network device operations shown in the above method embodiment.

[0347] The network side device may further include a network interface 1506, which is, for example, a Common Public Radio Interface (CPRI).

[0348] Specifically, the network side device 1500 of the embodiment of the present application further includes: instructions or programs stored in the memory 1505 and executable on the processor 1504, and the processor 1504 calls the instructions or programs in the memory 1505 to execute. Fig.11 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0349] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the embodiment of the transmission method of the sidelink positioning reference signal are implemented, or the various processes of the embodiment of the sidelink resource allocation method are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0350] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0351] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the various processes of the above-mentioned sidelink positioning reference signal transmission method embodiment, or to implement the various processes of the above-mentioned sidelink resource allocation method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0352] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0353] The embodiment of the present application further provides a computer program / program product, which is stored in a storage medium, and is executed by at least one processor to implement the various processes of the above-mentioned sidelink positioning reference signal transmission method embodiment, or to implement the various processes of the above-mentioned sidelink resource allocation method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0354] An embodiment of the present application also provides a SL PRS transmission system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the side link positioning reference signal transmission method as described above, and the network side device can be used to execute the steps of the side link resource allocation method as described above.

[0355] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0356] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

[0357] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A method for transmitting a sidelink positioning reference signal, characterized in that: include: The terminal determines that a sidelink positioning reference signal SL PRS needs to be sent; The terminal sends a target request to the access network device, wherein the target request is used to request allocation of side link resources, and the side link resources are used to send the SL PRS; The terminal obtains the sidelink resource allocated by the access network device to the terminal; The terminal transmits the SL PRS on the allocated sidelink resource.

2. The method according to claim 1, characterized in that The terminal sending the target request to the access network device includes: The terminal sends the target request to the access network device when the terminal is configured in sidelink resource allocation mode 1 and does not send the sidelink resource of the SL PRS.

3. The method according to claim 2, characterized in that The side link resource for not sending the SL PRS includes at least one of the following: There are no available sidelink resources for the SL PRS transmission; There are no side link resources that meet the delay requirement for sending the SL PRS within a predetermined time period.

4. The method according to any one of claims 1 to 3, characterized in that: The target request includes a first scheduling request SR, where the first SR is used to request allocation of the side link resource; Wherein, before the terminal sends the target request to the access network device, the method further includes: The terminal receives first configuration information from the access network device, where the first configuration information includes configuration information of the first SR; The terminal sends a target request to the access network device, including: The terminal sends the first SR to the access network device based on the first configuration information.

5. The method according to claim 4, characterized in that The configuration information of the first SR includes a scheduling request identifier of the first SR, and the scheduling request identifier is associated with an air interface resource configuration for sending the first SR.

6. The method according to claim 4 or 5, characterized in that: The configuration information of the first SR is configured based on the granularity of the terminal.

7. The method according to claim 4 or 5, characterized in that: The configuration information of the first SR is configured based on the granularity of the SL PRS resource pool; Among them, the terminal sends the first SR to the access network device based on the first configuration information, including: the terminal sends the first SR corresponding to the target resource pool to the access network device based on the first configuration information, and the target resource pool corresponds to the SL PRS.

8. The method according to claim 5, characterized in that The scheduling request identifier of the first SR is a dedicated identifier and is dedicated to identifying a scheduling request for requesting allocation of SL PRS transmission resources; or, The scheduling request identifier of the first SR is a non-dedicated identifier. In addition to being used to identify the scheduling request for requesting allocation of SL PRS transmission resources, the scheduling request identifier of the first SR is also used to identify scheduling requests for other purposes except requesting allocation of SL PRS transmission resources.

9. The method according to any one of claims 1 to 3, characterized in that: The target request includes a target media access control layer MAC control element CE, and the target MAC CE is used to request allocation of the side link resource.

10. The method according to claim 9, characterized in that Before the terminal sends the target request to the access network device, the method further includes: The terminal receives second configuration information from the access network device, wherein the second configuration information includes: configuration information of a second SR, the second SR is used to request allocation of air interface resources, and the air interface resources are used to send the target MACCE.

11. The method according to claim 10, characterized in that The configuration information of the second SR includes a scheduling request identifier of the second SR, and the scheduling request identifier is associated with an air interface resource configuration used to send the second SR.

12. The method according to claim 11, characterized in that The scheduling request identifier of the second SR is a dedicated identifier and is dedicated to identifying a scheduling request for requesting allocation of air interface resources for sending the target MAC CE; or, The scheduling request identifier of the second SR is a non-dedicated identifier. In addition to being used to identify the scheduling request requesting the allocation of air interface resources for sending the target MAC CE, the scheduling request identifier of the second SR is also used to identify scheduling requests for other purposes besides requesting the allocation of air interface resources for sending the target MAC CE.

13. The method according to claim 10, characterized in that The terminal sending the target request to the access network device includes: In a case where the terminal has a first air interface resource available for sending the target MAC CE, the terminal sends the target MAC CE to the access network device on the first air interface resource; or, When the terminal has no first air interface resources available for sending the target MAC CE, the terminal sends the second SR to the access network device and obtains the second air interface resources allocated by the access network device for sending the target MAC CE, and the terminal sends the target MAC CE to the access network device through the second air interface resources.

14. The method according to any one of claims 9 to 13, characterized in that: The target MAC CE includes a MAC CE dedicated to requesting allocation of the sidelink resource.

15. The method according to claim 14, characterized in that The target MAC CE includes at least one of the following information: Resource bandwidth information of the SL PRS; Resource pool information of the SL PRS; The transmission period of the SL PRS; The number of times the SL PRS is sent; The destination address information of the SL PRS.

16. The method according to any one of claims 9 to 13, characterized in that: The target MAC CE includes a sidelink buffer status report MAC CE.

17. The method according to claim 16, characterized in that Before the terminal sends the target request to the access network device, the method further includes: the terminal receiving a first message sent by the access network device, wherein the first message carries a target logical channel group identifier corresponding to the SL PRS; The terminal sending the target request to the access network device includes: the terminal sending the target MAC CE to the access network device, wherein the value of the logical channel group identifier field in the target MAC CE is the target logical channel group identifier.

18. The method according to claim 17, characterized in that The first message also carries the target transmission priority corresponding to the SL PRS.

19. The method according to claim 17 or 18, characterized in that Before the terminal receives the first message sent by the access network device, the method further includes: The terminal sends a second message to the access network device, wherein the second message carries indication information for indicating SLPRS transmission requirements.

20. The method according to any one of claims 16 to 19, characterized in that The value of the buffer size field in the target MAC CE is the equivalent sidelink data size converted by the SL PRS; or, the buffer size field in the target MAC CE is used to indicate the transmission information of the SL PRS.

21. The method according to claim 20, characterized in that The transmission information of the SL PRS includes at least one of the following: Resource bandwidth information of the SL PRS; Resource pool information of the SL PRS; The transmission period of the SL PRS; The number of times the SL PRS is sent; The destination address information of the SL PRS.

22. The method according to claim 1, characterized in that The terminal determines that a sidelink positioning reference signal SL PRS needs to be sent, including: After the media access control layer of the terminal receives the SL PRS transmission request from the sidelink positioning protocol layer or the physical layer of the terminal, the terminal determines that the SL PRS needs to be sent.

23. A method for allocating sidelink resources, characterized in that: include: The access network device receives a target request sent by the terminal, wherein the target request is used to request allocation of a side link resource, and the side link resource is used to send the SL PRS; The access network device allocates side link resources for the terminal to send the SL PRS.

24. The method according to claim 23, characterized in that The target request includes a first scheduling request SR, where the first SR is used to request allocation of the side link resource; Wherein, before the access network device receives the target request sent by the terminal, the method further includes: The access network device sends first configuration information to the terminal, where the first configuration information includes configuration information of the first SR.

25. The method according to claim 24, characterized in that The configuration information of the first SR includes a scheduling request identifier of the first SR, and the scheduling request identifier is associated with an air interface resource configuration for sending the first SR.

26. The method according to claim 24 or 25, characterized in that The configuration information of the first SR is configured based on the granularity of the terminal.

27. The method according to claim 24 or 25, characterized in that The configuration information of the first SR is configured based on the granularity of the SL PRS resource pool; The access network device allocates side link resources for sending the SL PRS to the terminal, including: the access network device allocates side link resources for sending the SL PRS to the terminal from a target resource pool corresponding to the first SR.

28. The method according to claim 25, characterized in that The scheduling request identifier of the first SR is a dedicated identifier and is dedicated to identifying a scheduling request for requesting allocation of SL PRS transmission resources; or, The scheduling request identifier of the first SR is a non-dedicated identifier. In addition to being used to identify the scheduling request for requesting allocation of SL PRS transmission resources, the scheduling request identifier of the first SR is also used to identify scheduling requests for other purposes except requesting allocation of SL PRS transmission resources.

29. The method according to claim 23, characterized in that The target request includes a target media access control layer MAC control element CE, and the target MAC CE is used to request allocation of the side link resource.

30. The method according to claim 29, characterized in that Before the access network device receives the target request sent by the terminal, the method further includes: The access network device sends second configuration information to the terminal, wherein the second configuration information includes: configuration information of a second SR, the second SR is used to request allocation of air interface resources, and the air interface resources are used to send the target MAC CE.

31. The method according to claim 30, characterized in that The configuration information of the second SR includes a scheduling request identifier of the second SR, and the scheduling request identifier is associated with an air interface resource configuration used to send the second SR.

32. The method according to claim 31, characterized in that The scheduling request identifier of the second SR is a dedicated identifier and is dedicated to identifying a scheduling request for requesting allocation of air interface resources for sending the target MAC CE; or, The scheduling request identifier of the second SR is a non-dedicated identifier. In addition to being used to identify the scheduling request requesting the allocation of air interface resources for sending the target MAC CE, the scheduling request identifier of the second SR is also used to identify scheduling requests for other purposes besides requesting the allocation of air interface resources for sending the target MAC CE.

33. The method according to claim 30, characterized in that The access network device receives a target request sent by a terminal, including: The access network device receives the target MAC CE sent by the terminal on a first air interface resource that is available for sending the target MAC CE; or, The access network device sends the second SR to the terminal, allocates a second air interface resource for sending the target MAC CE to the terminal, and receives the target MAC CE sent by the terminal on the second air interface resource.

34. The method according to any one of claims 29 to 33, characterized in that The target MAC CE includes a MAC CE dedicated to requesting allocation of the sidelink resource.

35. The method according to claim 34, characterized in that The target MAC CE includes at least one of the following information: Resource bandwidth information of the SL PRS; Resource pool information of the SL PRS; The transmission period of the SL PRS; The number of times the SL PRS is sent; The destination address information of the SL PRS.

36. The method according to any one of claims 29 to 33, characterized in that The target MAC CE includes a sidelink buffer status report MAC CE.

37. The method according to claim 36, characterized in that The access network device receives a target request sent by a terminal, including: The access network device sends a first message to the terminal, wherein the first message carries a target logical channel group identifier corresponding to the SL PRS; The access network device receives the target MAC CE sent by the terminal, wherein a value of a logical channel group identifier field in the target MAC CE is the target logical channel group identifier.

38. The method according to claim 37, characterized in that The first message also carries the target transmission priority corresponding to the SL PRS.

39. The method according to claim 37 or 38, characterized in that Before the access network device receives the target request sent by the terminal, the method further includes: The access network device receives a second message sent by the terminal, wherein the second message carries indication information for indicating SL PRS transmission requirements.

40. The method according to any one of claims 36 to 39, characterized in that The value of the buffer size field in the target MAC CE is the equivalent sidelink data size converted by the SL PRS; or, the buffer size field in the target MAC CE is used to indicate the transmission information of the SL PRS.

41. The method according to claim 40, characterized in that The transmission information of the SL PRS includes at least one of the following: Resource bandwidth information of the SL PRS; Resource pool information of the SL PRS; The transmission period of the SL PRS; The number of times the SL PRS is sent; The destination address information of the SL PRS.

42. A transmission device for a sidelink positioning reference signal, characterized in that: include: A determination module, used to determine whether a sidelink positioning reference signal SL PRS needs to be sent; A first transmission module, configured to send a target request to an access network device, wherein the target request is used to request allocation of a side link resource, and the side link resource is used to send the SL PRS; An acquisition module, used to acquire the sidelink resource allocated by the access network device to the terminal; The first transmission module is further configured to send the SL PRS on the allocated side link resources.

43. A device for allocating sidelink resources, characterized in that: include: A second transmission module is configured to receive a target request sent by a terminal, wherein the target request is used to request allocation of a side link resource, and the side link resource is used to send the SL PRS; An allocation module is used to allocate side link resources for the terminal to send the SL PRS.

44. A terminal, characterized in that: It includes a processor and a memory, the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method for transmitting a sidelink positioning reference signal as described in any one of claims 1 to 22 are implemented.

45. A network side device, characterized in that: It comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method for allocating side link resources as described in any one of claims 23 to 41 are implemented.

46. ​​A readable storage medium, characterized in that The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, it implements the steps of the method for transmitting a sidelink positioning reference signal as described in any one of claims 1 to 22, or implements the steps of the method for allocating sidelink resources as described in any one of claims 23 to 41.

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