A sidelink signaling positioning method and apparatus

Abstract

The application discloses a sidelink signaling positioning method, which is used for positioning a terminal device in a mobile communication system. The positioning group contains a target terminal and a plurality of anchor terminals. The method comprises the following steps: determining a positioning resource, which is used for transmitting a positioning reference signal in the positioning group; the positioning resource is associated with the positioning level of the target terminal, the positioning resource occupied by each terminal is independent, and all the positioning resources in the positioning group are within a preset time window; and sending a second sidelink signaling, which contains information of the positioning resource for at least one anchor terminal in the positioning group. The application also contains a device for implementing the method. The application solves the delay problem of positioning resource selection, and is especially suitable for the case of a plurality of anchor terminals.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a sidelink signaling location method and device. Background Technology

[0002] To support direct communication between terminal devices, a sidelink communication method is introduced. Based on the correspondence between sending and receiving terminal devices, three transmission modes are supported on the sidelink: unicast, multicast, and broadcast. Sidelink communication has two transmission resource allocation methods: one is dynamic scheduling by the network-side device (mode 1), and the other is autonomous selection by the terminal device from a resource pool broadcast by the network-side device (mode 2). Dynamic scheduling involves the network-side device dynamically allocating transmission resources on the sidelink to the terminal device based on the buffered data reported by the terminal device. Autonomous selection allows the terminal device to randomly select transmission resources from either a resource pool broadcast by the network-side device or a pre-configured resource pool. The specific allocation method used is configured by the network-side device through RRC (Radio Resource Control) signaling.

[0003] Currently, 5G R18 supports terminal device positioning based on SL (Stationary Location System). Positioning methods include Multi-RTT, TDOA, AOA, and AOD. The positioning measurements required for these methods will be obtained based on the Positioning Reference Signal (PRS) or SSB / CSI-RS configured on the SL. For the configuration of SL-PRS resources, two modes are considered: Mode 1 (base station allocation) and Mode 2 (terminal self-selection).

[0004] For Mode 2 sidelink localization, SL TDoA, similar to DL, requires establishing a sidelink group with at least three anchor UEs and target UEs. Anchor UEs acquire SL-PRS resources through listening and then send SL-PRS to the target UEs. The target UE receives SL-PRS from N anchor UEs, uses one anchor UE as a reference UE, and measures the RSTD values ​​of N-1 SL-PRS to calculate localization information. In DL-like SL TDoA, multiple UEs send SL-PRS to the T-UE (target UE), but the corresponding procedures and resource selection methods are not yet defined.

[0005] Similar to Uu-interface multiRTT, sidelink multi RTT for Mode 2 sidelink positioning requires establishing an SL positioning measurement group, including an anchor terminal and a target terminal. The anchor terminal acquires SL-PRS resources through channel listening and sends SL-PRS to the target terminal. The target terminal listens for SL-PRS resources through channel listening and sends SL-PRS to the anchor terminal. The target terminal measures the arrival time of the SL-PRS from the anchor terminal and the time difference between sending the SL-PRS to the anchor terminal, which is used to calculate positioning information. For RTT-based positioning, two UEs typically need to take turns sending SL-PRS and measuring the signal. To ensure the RTT function of SL-PRS transmission, sending UE-A should request UE-B to perform reverse SL-PRS transmission during the RTT session; however, the corresponding procedure and resource selection method have not yet been defined.

[0006] Unlike existing D2D / V2X Mode 2 resource selection, both SL TDoA positioning and sidelink multi RTT positioning require consideration of positioning accuracy when Mode 2 terminals autonomously select positioning resources. Therefore, improvements are needed to the Mode 2 positioning resource selection process. Furthermore, considering that multiple UEs are associated with sidelink positioning processes (e.g., RTT, TDoA), one UE is selected to assist other cooperating UEs in selecting SL-PRS transmission resources. This ensures that all associated SL-PRS transmission resources are sent within the expected time window, reducing resource selection latency. Summary of the Invention

[0007] This application proposes a sidelink signaling positioning method and device to solve the delay problem in positioning resource selection, which is particularly suitable for situations with multiple anchor point terminals.

[0008] Firstly, this application proposes a sidelink signaling location method for locating a terminal equipment group in a mobile communication system, wherein the location group includes a target terminal and multiple anchor terminals. The method includes the following steps:

[0009] Determine positioning resources, which are used to transmit positioning reference signals within the positioning group;

[0010] The location resources are associated with the location level of the target terminal. Each terminal occupies independent location resources, and all location resources in the location group are within a preset time window.

[0011] Send a second sidelink signaling message, the sidelink signaling message containing information about the positioning resources for at least one anchor terminal within the positioning group.

[0012] In one embodiment of this application, preferably, one anchor terminal determines the positioning resources of each terminal within the positioning group;

[0013] The anchor terminal receives a first sidelink signaling message, which includes first information, the first information being used to request the transmission of a positioning reference signal; and / or, the anchor terminal sends a second sidelink signaling message, which includes second information, the second information including indication information of positioning resources used by the anchor terminal in the positioning group to transmit the positioning reference signal.

[0014] Preferably, the side link signaling includes either the first information or the second information; the side link signaling format includes an identifier used to distinguish between the first information and the second information.

[0015] In another embodiment of this application, preferably, a target terminal determines the positioning resources of each terminal in the positioning group; the target terminal sends the second sidelink signaling, which includes third information, the third information including indication information of the positioning resources used by the anchor terminal in the positioning group to send the positioning reference signal.

[0016] In a third embodiment of this application, preferably, one target terminal determines the positioning resources of each terminal in the positioning group; the target terminal sends the second sidelink signaling, which includes fourth information, the fourth information including the positioning resources of the anchor terminal in the positioning group, and also including indication information of the positioning resources used by the target terminal to send the positioning reference signal.

[0017] In any embodiment of this application, preferably, the anchor terminal sends a positioning reference signal to the target terminal through the positioning resource, and / or the target terminal sends a positioning reference signal to the anchor terminal through the positioning resource.

[0018] In any embodiment of this application, preferably, the positioning resources include a first resource and a second resource. The first resource is used for the target terminal to send a positioning reference signal to the anchor terminal; the second resource is used for the anchor terminal to send a positioning reference signal to the target terminal.

[0019] In any embodiment of this application, the step of determining the positioning resources adopts the Mode 2 resource selection mechanism, wherein the RSRP threshold defined in the Mode 2 resource selection mechanism is associated with the positioning accuracy level.

[0020] Preferably, the first information includes at least one of the following indication information: positioning accuracy, time domain resources of positioning reference signal, frequency domain resources of positioning reference signal, and spatial domain resources of positioning reference signal.

[0021] Preferably, the second information includes at least one of the following indication information: positioning accuracy, time domain resources of positioning reference signal, frequency domain resources of positioning reference signal, and spatial domain resources of positioning reference signal.

[0022] Preferably, in one embodiment of this application, after sending the second sidelink signaling, the method further includes the following steps: receiving a HARQ signal in response to the second sidelink signaling and sending a positioning reference signal.

[0023] Secondly, this application also proposes a terminal device for implementing the method described in any one of the first aspects of this application, wherein the terminal device has at least one module for at least one of the following functions: determining the positioning resource; and sending the second sidelink signaling.

[0024] In one embodiment of this application, preferably, at least one module of the terminal device is further configured to perform at least one of the following functions: receiving a first control signaling message, including first information; and sending a second sidelink signaling message, including second information. The first information is used to request the transmission of a positioning reference signal. The second information includes indication information of the positioning resources used by the anchor terminal within the positioning group to transmit the positioning reference signal.

[0025] In other embodiments of this application, preferably, at least one module of the terminal device is further configured to perform at least one of the following functions: sending a second sidelink signaling message, including third information or fourth information. The third information includes indication information of the positioning resources used by the anchor terminal within the positioning group to send the positioning reference signal; the fourth information includes the positioning resources of the anchor terminal within the positioning group, and also includes indication information of the positioning resources used by the target terminal to send the positioning reference signal.

[0026] Thirdly, this application also proposes a sidelink signaling location method for locating a target terminal within a terminal equipment group in a mobile communication system. The location group includes the target terminal and multiple anchor terminals. The method includes the following steps:

[0027] Send a first sidelink signaling message, which includes first information, the first information being used to request the transmission of a positioning reference signal;

[0028] Receive second sidelink signaling, including second information, the second information including indication information of positioning resources used by anchor terminals in the positioning group to send positioning reference signals;

[0029] The location resources are associated with the location level of the target terminal. Each terminal occupies independent location resources, and all location resources in the location group are within a preset time window.

[0030] Preferably, in response to not receiving the second information within the first transmission period, the first information is retransmitted.

[0031] Preferably, after receiving the second information, the target terminal sends HARQ information, and the target terminal obtains location information based on the positioning reference signal.

[0032] Fourthly, this application also proposes a terminal device for implementing the method described in any one of the third aspects of this application, wherein the terminal device has at least one module for at least one of the following functions: sending a first sidelink signaling, including first information; receiving a second sidelink signaling, including second information; and determining location resources.

[0033] Fifthly, this application also proposes a communication device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the method as described in any one of the embodiments of the first and second aspects of this application.

[0034] Sixthly, this application also proposes a computer-readable medium on which a computer program is stored, which, when executed by a processor, implements the steps of the method as described in any one of the embodiments of the first and second aspects of this application.

[0035] In a seventh aspect, this application also proposes a mobile communication system for implementing the method described in any one of the embodiments of the first and third aspects of this application, wherein the mobile communication system includes a terminal device positioning group, and the positioning group includes a target terminal and a plurality of anchor terminals.

[0036] Furthermore, embodiments of this application also propose a mobile communication system comprising at least one terminal device as described in any embodiment of the second aspect of this application and / or at least one terminal device as described in the fourth aspect of this application.

[0037] The above-mentioned at least one technical solution adopted in the embodiments of this application can achieve the following beneficial effects:

[0038] By selecting positioning resources for multiple terminals through a single terminal device, the selected resources are located within the expected time window. The main advantage is that it simultaneously assists other terminals in selecting resources, rather than selecting them separately (which introduces time delays). Specifically, in the side-link TDOA positioning method of this patent, resources are selected for three anchor terminals by either the primary anchor terminal or the target terminal, and signaling is used to instruct the anchor terminals. This ensures that all associated SL-PRS transmission resources are available within the expected time window. For RTT-based positioning, typically two UEs need to take turns sending SL-PRS and measuring signals. In this patent, the control information sent by the target terminal allocates associated SL-PRS resources to the anchor terminals within a reserved period, reducing transmission delay compared to separating resource selection from each single transmission. Furthermore, when the target terminal or anchor terminal executes SL-PRS resource allocation scheme 2 to select SL-PRS transmission resources, the threshold value of RSRP is considered in relation to positioning accuracy to ensure the high reliability of the selected SL-PRS resources and achieve the required positioning accuracy. Attached Figure Description

[0039] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0040] Figure 1 This is a flowchart of the first embodiment of the method of this application;

[0041] Figure 2 This is a flowchart of a second embodiment of the method of this application;

[0042] Figure 3 This is a flowchart of the third embodiment of the method of this application;

[0043] Figure 4 This is a schematic diagram of an embodiment of the terminal device;

[0044] Figure 5 This is a block diagram of a terminal device according to another embodiment of the present invention. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0047] Figure 1 This is a flowchart of the first embodiment of the method of this application.

[0048] Example 1: A workflow for TDOA on a side link is as follows Figure 1 As shown, the target terminal has three anchor terminals. One anchor terminal is defined as the primary anchor terminal, and the other two anchor terminals are defined as secondary anchor terminals. The target terminal and the three anchor terminals are defined as a first positioning group, identified by the first positioning group ID. The base station sends first configuration information to the target terminal, indicating the primary anchor terminal, secondary anchor terminals, and positioning group ID in the first positioning group.

[0049] The specific implementation steps are as follows:

[0050] Step 11: The target terminal sends a first side link signaling message to the main anchor terminal, which includes first information for requesting positioning services. The first information includes at least positioning accuracy information.

[0051] The target terminal sends a first message to the master anchor terminal in the positioning group to request the transmission of a positioning reference signal. The first message indicates the accuracy of the requested positioning and / or the time-domain, frequency-domain, and spatial-domain resources of the positioning reference signal.

[0052] When the target terminal needs positioning, it sends first information to the main anchor terminal, indicating the required positioning accuracy within the first information. For example, the first information may contain 2 bits, each corresponding to a different positioning accuracy level (pk).

[0053] 00 1 01 2 10 3 11 4

[0054] The specific instruction to which terminal to send can be carried in the first-side-link signaling by the identifier of the target terminal, the identifier of the main anchor terminal, or the group identifier of the anchor terminal. Alternatively, the identifier of the target terminal, the identifier of the main anchor terminal, or the identifier of the anchor terminal can be used to CRC scramble the first-side-link signaling.

[0055] Step 12: The main anchor terminal performs Mode 2 resource selection, selecting the positioning resources of each anchor terminal (main anchor terminal and auxiliary anchor terminal) for sending positioning reference signals.

[0056] Mode 2 resource selection method and priority association. The main anchor terminal adopts the Mode 2 resource selection mechanism, in which the RSRP threshold defined in the Mode 2 resource selection mechanism is associated with the positioning accuracy level.

[0057] Mode 2 sensing is based on excluding candidate resources that are retained and whose measured RSRP is higher than a threshold. The initial RSRP threshold is determined based on both the L1 priority included in the decoded SCI and the L1 priority of the TB. The NR Rel-16TS 36.214 standard defines an sl-Thres-RSRP-List indicated by higher-layer signaling, which provides the RSRP threshold, jointly determined by the priority indicated by the SCI signaling and the priority of the resource selected by the UE. However, if the number of available candidate resources is less than the (pre-)configured number, the RSRP threshold is increased by 3dB until that number is reached. RSRP increments can cause high interference in selected resources, especially under congestion conditions. Therefore, in positioning Mode 2 resource selection methods and priority association, a first threshold based on the required positioning accuracy is defined, which is jointly determined by the priority indicated by the SCI signaling, the priority of the resource selected by the UE, and the positioning accuracy.

[0058] The specific process of the Mode 2 resource allocation method of the main anchor terminal is as follows: the main anchor terminal performs detection and resource reservation for each candidate time slot in the detection window. The terminal collects the demodulated PSCCH and RSRP detection information, checks the information sent by the sidelink UE itself, and compares RSRP with the threshold value. Here, the threshold value is the value indicated by the i-th field in the sl-Thres-RSRP-List configured by the higher layer signaling. Unlike NR Rel-16, i = pi + (pj-1) * 8, the first threshold is defined as pi + (pj-1) * 8 + pk, where pi is the priority indicated by SCI, pj is the priority of the data packet, and pk is the positioning accuracy level indicated by the first information. If RSRP is less than or equal to the threshold value, it is used as a candidate resource. If the number of candidate resources is less than 20% of the total number of resources, the threshold value is increased by 3 dB.

[0059] The main anchor terminal randomly selects three candidate resources from the candidate resources, which are used to transmit positioning reference signals for the main anchor terminal and the two auxiliary anchor terminals, respectively.

[0060] Step 13: The main anchor terminal sends a second side link signaling message to the auxiliary anchor terminals and the target terminal in the positioning group, which contains second information to indicate the positioning resource information of each anchor terminal.

[0061] Accordingly, the target terminal and the anchor terminal receive a second sidelink signaling message, which includes second information. This second information is used to indicate the time-domain, frequency-domain, and spatial resources used by the target terminal and the anchor terminal in the positioning group to transmit positioning reference signals.

[0062] Method 1: The second information is sent via unicast, scrambled with the identifier of the auxiliary anchor terminal, and the second information indicates the location resource information of each auxiliary anchor terminal.

[0063] Method 2: The second information is sent via multicast, scrambled with the group identifier of the anchor terminal, and the second information indicates the location resource information of the auxiliary anchor terminals in the group.

[0064] Preferably, when using method 2, the first information is also scrambled with the group identifier of the anchor terminal, and the first and second information are carried in the same side link signaling format, adopting a unified signaling design.

[0065] The sidelink signaling format includes an identifier to distinguish between the first information and the second information. For example, sidelink signaling can use 1 bit to distinguish between the first information and other control information. For example, a location group identifier can be used to identify the first information and the second information, which share the same sidelink signaling format.

[0066] Sidelink signaling uses location group identifiers to identify the terminal range of sidelink communication. Preferably, the transmitted sidelink signaling is scrambled with location group identifiers, and the received sidelink signaling is descrambled with location group identifiers.

[0067] For example, a request / indicate flag can be designed to distinguish between the first and second information. When the flag is "request", it indicates the first information. The information carried by the side link signaling at this time also includes the requested positioning accuracy information or the expected frequency, time, and spatial information of the positioning reference signal. When the flag is "indicate", the information carried by the side link signaling at this time is the second information. The information carried by the side link signaling at this time also includes the frequency, time, and spatial information of the positioning reference signal of each anchor terminal.

[0068] The second set of information includes frequency information such as the bandwidth and comb information of the positioning reference signal, time information such as the number of repetitions of resource reservation, and frequency information such as the beam information of the positioning reference signal.

[0069] The target terminal can determine the location resources based on the instructions of the received second information.

[0070] After sending the first sidelink signaling containing the first information, the target terminal receives the second sidelink signaling containing the second information within a first timer period or at a time after a second timer period. Upon receiving the second information, the target terminal sends a HARQ confirmation to the positioning group. If the second information is not received within the first timer period, the target terminal retransmits the first sidelink signaling containing the first information.

[0071] Step 14: The anchor terminal sends a positioning reference signal, and the target terminal obtains the location information based on the positioning reference signal.

[0072] Upon receiving HARQ confirmation, the primary anchor terminal and the secondary anchor terminal send positioning reference signals on the selected and indicated positioning resources. The target terminal receives the positioning reference signals to calculate its location information.

[0073] The primary anchor terminal transmits a positioning reference signal based on the positioning resources it selects, while the secondary anchor terminal transmits a positioning reference signal based on the positioning resources indicated by the time-domain, frequency-domain, and spatial-domain information provided in the second information. The target terminal receives the positioning reference signals to calculate its location information.

[0074] Figure 2 This is a flowchart of a second embodiment of the method of this application.

[0075] Example 2: A workflow for TDOA on a side link is as follows Figure 2 As shown, the target terminal has three anchor terminals. The target terminal and the three anchor terminals are defined as the first positioning group, and its identifier is the first positioning group ID. The base station sends first configuration information to the target terminal, indicating the primary anchor terminal, secondary anchor terminal, and positioning group ID in the first positioning group, or the target terminal can choose its own anchor terminals. The target terminal and the anchor terminals together form a positioning group, which is identified by a positioning identifier.

[0076] The specific implementation steps are as follows:

[0077] Step 21: The target terminal selects three candidate resources in Mode 2 for the transmission of positioning reference signals from the three anchor terminals. When selecting resources, the target terminal selects the corresponding first threshold value according to its own positioning accuracy requirements.

[0078] The target terminal adopts the Mode 2 resource selection mechanism, in which the RSRP threshold defined in the Mode 2 resource selection mechanism is associated with the positioning accuracy level.

[0079] The specific process of the target terminal's Mode 2 resource allocation method is as follows: the target terminal performs detection and resource reservation for each candidate time slot in the detection window. The terminal collects demodulated PSCCH and RSRP detection information, checks the information sent by the sidelink UE, and compares RSRP with a first threshold. The target terminal selects the first threshold for the required positioning accuracy based on the positioning level configured by the base station or its own positioning level requirements. Here, the threshold value is the value indicated by the i-th field in the sl-Thres-RSRP-List configured by the higher-layer signaling. Unlike NR Rel-16 where i = pi + (pj-1) * 8, the first threshold is defined as pi + (pj-1) * 8 + pk, where pi is the priority indicated by SCI, pj is the priority of the data packet, and pk is the positioning accuracy level indicated by the higher-layer signaling or determined by the terminal based on its own positioning accuracy requirements. If RSRP is less than or equal to the threshold value, it is considered a candidate resource. If the number of candidate resources is less than 20% of the total number of resources, the threshold value is increased by 3 dB.

[0080] The target terminal randomly selects three candidate resources from the candidate resources, which are used to send positioning reference signals for the three anchor terminals respectively.

[0081] Step 22: The target terminal sends a second-side link signaling message containing third information, and sends the three candidate resources it has selected to the anchor terminal.

[0082] The target terminal sends a third piece of information to instruct the anchor terminal on the positioning resources used to send the positioning reference signal.

[0083] Method 1: The third information is sent via unicast, scrambled with anchor terminal identifiers, and the third information indicates the location resource information of each auxiliary anchor terminal.

[0084] Method 2: The third information is sent via multicast, scrambled with the group identifier of the anchor terminal, and the second information indicates the location resource information of the auxiliary anchor terminals within the group.

[0085] Step 23: The primary anchor terminal and the secondary anchor terminal send positioning reference signals on the selected and indicated positioning resources, and the target terminal receives the positioning reference signals to calculate the location information.

[0086] The primary anchor terminal transmits a positioning reference signal on the positioning resources it selects, while the secondary anchor terminal transmits a positioning reference signal on the positioning resources indicated by the time-domain, frequency-domain, and spatial-domain information provided by the third information. The target terminal receives the positioning reference signal to calculate its location information. Furthermore, the sidelink signaling format includes an identifier used to determine the third information.

[0087] Figure 3 This is a flowchart of the third embodiment of the method of this application.

[0088] Example 3: A workflow for RTT positioning of a side link is as follows Figure 3 As shown, the target terminal has an anchor terminal. The target terminal and the anchor terminal are defined as a first positioning group, identified by the first positioning group ID. The base station sends first configuration information to the target terminal, indicating the anchor terminal and the positioning group ID in the first positioning group, or the target terminal can choose its own anchor terminal. The target terminal and the anchor terminal together form a positioning group, which is identified by a positioning identifier.

[0089] The specific implementation steps are as follows:

[0090] Step 31: The target terminal selects Mode 2 resources based on its own positioning accuracy or the positioning level configured by the base station. It selects the first resource for the target terminal to send positioning reference signals to the anchor terminal, and selects the second resource for the anchor terminal to send positioning reference signals to the target terminal.

[0091] The target terminal uses the Mode 2 resource selection mechanism to select the anchor terminal and its own positioning reference signal transmission resources, where the RSRP threshold is associated with the positioning accuracy level.

[0092] The specific process of the target terminal's Mode 2 resource allocation method is as follows: the target terminal performs detection and resource reservation for each candidate time slot in the detection window. The terminal collects demodulated PSCCH and RSRP detection information, checks the information sent by the sidelink UE, and compares RSRP with the first threshold. The target terminal selects the first threshold for the required positioning accuracy based on the positioning level configured by the base station or its own positioning level requirements. Here, the threshold value is the value indicated by the i-th field in the sl-Thres-RSRP-List configured by the higher-layer signaling. Unlike NR Rel-16 where i = pi + (pj-1) * 8, the first threshold is defined as pi + (pj-1) * 8 + pk, where pi is the priority indicated by SCI, pj is the priority of the data packet, and pk is the positioning accuracy level indicated by the higher-layer signaling or determined by the terminal based on its own positioning accuracy requirements. If RSRP is less than or equal to the threshold value, it is considered a candidate resource. If the number of candidate resources is less than 20% of the total number of resources, the threshold value is increased by 3 dB.

[0093] The target terminal randomly selects two candidate resources from the candidate resources. The first resource is used for the positioning reference signal sent by the target terminal to the anchor terminal, and the second resource is used for the anchor terminal to send the positioning reference signal to the target terminal.

[0094] Step 32: The target terminal sends a second sidelink signaling message containing fourth information, which is used to indicate the positioning reference signal transmission information sent by itself and the positioning reference signal transmission information of the anchor terminal. That is, it is used to instruct the anchor terminal to receive the positioning resource information of the positioning reference signal from the target terminal and the positioning resource information used by the anchor terminal to send the positioning reference signal.

[0095] Method 1: The fourth information is sent via unicast, scrambled with the identifier of the auxiliary anchor terminal, and the fourth information indicates the location resource information of each auxiliary anchor terminal.

[0096] Method 2: The fourth message is sent via multicast, scrambled with the group identifier of the anchor terminal, and the fourth message indicates the location resource information of the auxiliary anchor terminals within the group.

[0097] The fourth information is carried by sidelink signaling. The information carried by the sidelink signaling includes time-domain, frequency-domain, and spatial resources of the positioning reference signal received by the anchor terminal from the target terminal, as well as time-domain, frequency-domain, and spatial resources of the positioning reference signal sent by the anchor terminal to the target terminal. Frequency information includes the bandwidth and comb information of the positioning reference signal, time information includes the number of repetitions reserved for resources, and frequency information includes the beam information of the positioning reference signal. Furthermore, the sidelink signaling format includes an identifier used to determine the fourth information.

[0098] The specific instruction sent to which terminal can be carried in the side link signaling, such as the identifier of the target terminal, the identifier of the main anchor terminal, or the group identifier of the anchor terminal. Alternatively, different identifiers can be used to CRC scramble the side link signaling.

[0099] Step 33: The target terminal receives the positioning reference signal to calculate the location information.

[0100] The primary anchor point terminal transmits a positioning reference signal based on the positioning resources it selects, while the secondary anchor point terminal transmits a positioning reference signal based on the positioning resources indicated by the time, frequency, and spatial information provided in the fourth information. The target terminal receives the positioning reference signals to calculate its location information.

[0101] It should be noted that the steps in the above embodiments are used for network entities of wireless communication systems, and can also be used for service devices that provide information processing for the network entity devices; the above steps can also be used for any device, system, subsystem, circuit, chip or software entity that provides information reception, transmission, identification and processing for terminal devices.

[0102] Figure 4 This is a schematic diagram of an embodiment of the terminal device.

[0103] This application also proposes a terminal device for implementing the method of any embodiment of this application, for implementing the method of any one of the first aspects of this application, wherein the terminal device has at least one module for at least one of the following functions: determining the positioning resource; sending the second sidelink signaling.

[0104] In one embodiment of this application, preferably, at least one module of the terminal device is further configured to perform at least one of the following functions: receiving first sidelink signaling, including first information; and sending second sidelink signaling, including second information. The first information is used to request the transmission of a positioning reference signal. The second information includes indication information of the positioning resources used by the anchor terminal within the positioning group to transmit the positioning reference signal.

[0105] In other embodiments of this application, preferably, at least one module of the terminal device is further configured to perform at least one of the following functions: sending a second sidelink signaling message, including third information or fourth information. The third information includes indication information of the positioning resources used by the anchor terminal within the positioning group to send the positioning reference signal; the fourth information includes the positioning resources of the anchor terminal within the positioning group, and also includes indication information of the positioning resources used by the target terminal to send the positioning reference signal.

[0106] This application also proposes a terminal device for implementing the method described in any of the third aspects of this application, wherein the terminal device has at least one module for at least one of the following functions: sending a first sidelink signaling, including first information; receiving a second sidelink signaling, including second information; and determining the positioning resource.

[0107] Furthermore, this application also proposes a terminal device for implementing the method described in any one of the first aspects of this application, wherein the terminal device has at least one module for at least one of the following functions: receiving second, third, or fourth location information; determining the location resource; and sending a location reference signal.

[0108] To implement the above technical solution, this application proposes a terminal device 500, which includes a terminal sending module 501, a terminal determining module 502, and a terminal receiving module 503 connected to each other.

[0109] The terminal determination module is used to determine the location resources.

[0110] The terminal sending module is used to send the second side link signaling, which may include second information, third information or fourth information.

[0111] In one embodiment of this application, the terminal device is used as a target terminal, the terminal sending module is used to send a first sidelink signaling, which includes first information, and the terminal receiving module is also used to receive a second sidelink signaling, which includes second information; the terminal determining module determines the location resource based on the second information.

[0112] In one embodiment of this application, the terminal device is used as a primary anchor terminal, the terminal sending module is used to send a second sidelink signaling containing second information, and the terminal receiving module is also used to receive a first sidelink signaling containing first information; the terminal determining module determines the positioning resource according to the Mode 2 resource selection method.

[0113] In one embodiment of this application, the terminal device is used as an auxiliary anchor point terminal, the terminal sending module is used to send a positioning reference signal, the terminal receiving module is used to receive a second sidelink signaling, including second information, third information or fourth information, and the terminal determining module determines the positioning resource based on the second information, third information or fourth information.

[0114] In one embodiment of this application, the terminal device is used as a target terminal, the terminal sending module sends third or fourth information, the terminal determining module determines the positioning resource according to the Mode 2 resource selection method, and the terminal receiving module receives a positioning reference signal from the anchor terminal. In some embodiments, the terminal sending module also sends a positioning reference signal to the anchor terminal through a first resource.

[0115] The specific methods for implementing the functions of the terminal sending module, the terminal determining module, and the terminal receiving module are as described in the various method embodiments of this application, and will not be repeated here.

[0116] The terminal equipment described in this application may refer to user equipment (UE), personal mobile terminal, smart terminal, mobile phone, computer with communication function, system providing services for the above-mentioned equipment, or any system, subsystem, module, circuit, chip or software running device that provides information reception, transmission, identification and processing for the above-mentioned equipment.

[0117] Figure 5 This is a block diagram of a terminal device according to another embodiment of the present invention. The terminal device 700 includes at least one processor 701, a memory 702, a user interface 703, and at least one network interface 704. The various components in the terminal device 700 are coupled together via a bus system. The bus system is used to implement communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.

[0118] User interface 703 may include a display, keyboard, or clicking device, such as a mouse, trackball, touchpad, or touchscreen.

[0119] The memory 702 stores executable modules or data structures. The memory may store an operating system and application programs. The operating system includes various system programs, such as a framework layer, core library layer, and driver layer, used to implement various basic business functions and handle hardware-based tasks. The application programs include various applications, such as media players and browsers, used to implement various application functions.

[0120] In an embodiment of the present invention, the memory 702 contains a computer program that executes any one embodiment of the present application, and the computer program runs on or modifies the processor 701.

[0121] The memory 702 includes a computer-readable storage medium. The processor 701 reads the information in the memory 702 and, in conjunction with its hardware, completes the steps of the above-described method. Specifically, the computer-readable storage medium stores a computer program, which, when executed by the processor 701, implements the steps of the method embodiments described in any of the above embodiments.

[0122] The processor 701 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the method in this application can be completed by the integrated logic circuitry in the hardware of the processor 701 or by instructions in software form. The processor 701 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a readily available programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of this invention can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor.

[0123] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. In a typical configuration, the device of this application includes one or more processors (CPUs), input / output user interfaces, network interfaces, and memory.

[0124] Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0125] Therefore, this application also proposes a computer-readable medium storing a computer program that, when executed by a processor, implements the steps of the method described in any embodiment of this application. For example, the memory 603, 702 of the present invention may include non-permanent memory in the form of computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM.

[0126] Based on the embodiments of the above-described apparatus of this application, this application also proposes a mobile communication system, including at least one embodiment of any one of the terminal devices described in this application.

[0127] It should be noted that the specific mobile communication technology described in this invention is not limited, and can be WCDMA, CDMA2000, TD-SCDMA, WiMAX, LTE / LTE-A, LAA, MuLTEfire, and subsequent fifth-generation, sixth-generation, and Nth-generation mobile communication technologies.

[0128] The terminal described in this invention refers to a terminal-side product that can support the communication protocols of terrestrial mobile communication systems, and a specially designed wireless modem module that can be integrated into various types of terminal forms such as mobile phones, tablets, and data cards to complete communication functions.

[0129] For ease of description, the fourth-generation mobile communication system LTE / LTE-A and its derivative MulteFire are used as examples, where the mobile communication terminal can be represented as UE (User Equipment).

[0130] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0131] It should also be noted that the terms "first", "second", etc. in this application are used to distinguish multiple objects with the same name, and unless otherwise specified, they have no meaning of order or size.

[0132] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A sidelink signaling location method for locating a terminal equipment group in a mobile communication system, the location group comprising a target terminal and multiple anchor terminals, characterized in that, Includes the following steps: The target terminal or one anchor terminal uses a Mode 2 resource selection mechanism to determine positioning resources for each terminal in the positioning group. The positioning resources are used to transmit positioning reference signals within the positioning group. In the resource selection mechanism of Mode 2, the RSRP threshold is associated with the positioning accuracy level. The RSRP threshold is defined as pi + (pj - 1)*8 + pk, where pi is the priority indicated by SCI, pj is the priority of the data packet, and pk is the positioning accuracy level indicated by the first information. The location resources are associated with the location level of the target terminal. Each terminal occupies independent location resources, and all location resources in the location group are within a preset time window. The target terminal or the anchor terminal that determines the location resource sends a second sidelink signaling message, the second sidelink signaling message containing information about the location resource determined for at least one anchor terminal in the location group; The transmitted sidelink signaling is scrambled using the location group identifier, and the received sidelink signaling is descrambled using the location group identifier.

2. The side link signaling location method as described in claim 1, characterized in that, One anchor point terminal determines the positioning resources of each terminal within the positioning group; The anchor terminal receives a first side link signaling, which includes first information, the first information being used to request the transmission of a positioning reference signal; And / or, The anchor terminal sends a second sidelink signaling message, which includes second information, the second information including indication information of the positioning resources used by the anchor terminal in the positioning group to send the positioning reference signal.

3. The side link signaling location method as described in claim 2, characterized in that, The side link signaling contains either the first information or the second information; The sidelink signaling format includes an identifier used to distinguish between the first and second information.

4. The side link signaling location method as described in claim 1, characterized in that, One target terminal determines the location resources of each terminal within the location group; The target terminal sends the second sidelink signaling, which includes third information, including indication information of the positioning resources used by the anchor terminal in the positioning group to send the positioning reference signal.

5. The side link signaling location method as described in claim 1, characterized in that, One target terminal determines the location resources of each terminal within the location group; The target terminal sends the second sidelink signaling, which includes fourth information. The fourth information includes the positioning resources of the anchor terminal in the positioning group, and also includes indication information of the positioning resources used by the target terminal to send the positioning reference signal.

6. The side link signaling location method as described in claim 1, characterized in that, The anchor terminal sends a positioning reference signal to the target terminal through the positioning resources, and / or the target terminal sends a positioning reference signal to the anchor terminal through the positioning resources.

7. The side link signaling location method as described in claim 1, characterized in that, The positioning resources include a first resource and a second resource; The first resource is used by the target terminal to send a positioning reference signal to the anchor terminal; The second resource is used by the anchor terminal to send a positioning reference signal to the target terminal.

8. The side link signaling location method as described in claim 1, characterized in that, If the number of candidate resources is less than 20% of the total number of resources, the threshold is increased by 3 dB.

9. The side link signaling location method as described in claim 2, characterized in that, The second information includes at least one of the following indications: Positioning accuracy, time domain resources of positioning reference signals, frequency domain resources of positioning reference signals, and spatial domain resources of positioning reference signals.

10. The side link signaling location method as described in claim 2, characterized in that, The first information includes at least one of the following indications: Positioning accuracy, time domain resources of positioning reference signals, frequency domain resources of positioning reference signals, and spatial domain resources of positioning reference signals.

11. The side link signaling location method as described in claim 2, characterized in that, After sending the second-side link signaling, the following steps are also included: Receive the HARQ signal in response to the second sidelink signaling and send a positioning reference signal.

12. A sidelink signaling positioning method for locating target terminals within a terminal equipment group in a mobile communication system, the positioning group comprising the target terminal and multiple anchor terminals, wherein one anchor terminal uses a Mode 2 resource selection mechanism to determine positioning resources for each terminal within the positioning group, the positioning resources being used to transmit positioning reference signals within the positioning group, wherein the RSRP threshold defined in the Mode 2 resource selection mechanism is associated with the positioning accuracy level, the RSRP threshold being a first threshold defined as pi + (pj - 1)*8 + pk, where pi is the priority indicated by SCI, pj is the priority of the data packet, and pk is the positioning accuracy level indicated by the first information; characterized in that... Includes the following steps: Send a first sidelink signaling message, which includes first information, the first information being used to request the transmission of a positioning reference signal; Receive second sidelink signaling from anchor terminal, including second information, the second information including indication information of positioning resources used by anchor terminal in positioning group to send positioning reference signal; The location resources are associated with the location level of the target terminal. Each terminal occupies independent location resources, and all location resources in the location group are within a preset time window. The second sidelink signaling is scrambled with a location group identifier, and the target terminal receives the second sidelink signaling after descrambling with the location group identifier.

13. The side link signaling location method as described in claim 12, characterized in that, It also includes the following steps: If the second information is not received within the first time period, the first information is resent.

14. The side link signaling location method as described in claim 12, characterized in that, It also includes the following steps: After receiving the second information, the target terminal sends HARQ information, and the target terminal obtains location information based on the positioning reference signal.

15. A terminal device for implementing the method according to any one of claims 1 to 11, characterized in that, At least one module of the terminal device is used to perform at least one of the following functions: determining the location resource; sending the second sidelink signaling.

16. The terminal device as described in claim 15, characterized in that, At least one module of the terminal device is further configured to perform at least one of the following functions: receiving a first control signaling message, which includes first information; and sending a second sidelink signaling message, which includes second information. The first piece of information is used to request the transmission of a positioning reference signal; The second information includes indication information of the positioning resources used by the anchor terminal within the positioning group to send positioning reference signals.

17. The terminal device as described in claim 15, characterized in that, At least one module of the terminal device is also used to implement at least one of the following functions: sending second sidelink signaling, including third or fourth information; The third information includes indication information of the positioning resources used by the anchor terminal within the positioning group to send positioning reference signals; The fourth piece of information includes the positioning resources of the anchor terminal within the positioning group, and also includes indication information of the positioning resources used by the target terminal to send the positioning reference signal.

18. A terminal device for implementing the method according to any one of claims 12-14, characterized in that, At least one module of the terminal device is configured to perform at least one of the following functions: sending a first sidelink signaling message containing first information; receiving a second sidelink signaling message containing second information.

19. A communication device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the method as described in any one of claims 1 to 14.

20. A computer-readable medium storing a computer program thereon, the computer program, when executed by a processor, implementing the steps of the method as claimed in any one of claims 1 to 14.

21. A mobile communication system for implementing the method of any one of claims 1 to 14, the mobile communication system comprising a terminal device positioning group, the positioning group comprising a target terminal and a plurality of anchor terminals.

22. A mobile communication system comprising at least one terminal device as described in any one of claims 15 to 17 and / or at least one terminal device as described in claim 18.

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