Method and apparatus for dl-tdoa positioning

Abstract

Embodiments of the present application provide a method and device for downlink time difference of arrival (DL-TDOA) positioning, wherein the method is applied to a terminal and includes: receiving a first message sent by a positioning server, the first message being used to request position information of the terminal, and the first message including at least indication information; and determining, based on the indication information, whether to perform reference signal time difference (RSTD) measurement on a first downlink positioning reference signal (DL-PRS) by using multiple receiving channels. Embodiments of the present application provide a method for DL-TDOA positioning, which indicates the terminal to perform RSTD measurement on a first DL-PRS by using different receiving channels through configured indication information, and a positioning server determines RSTD measurement values of different receiving channels and corresponding time errors based on measurement information reported by the terminal, thereby improving positioning accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, and particularly relates to a downlink time difference of arrival (DL-TDOA) positioning method and device. BACKGROUND

[0002] The 5G standard has supported obtaining position information of a terminal through a downlink time difference of arrival (DL-TDOA) positioning method. The DL-TDOA principle is to obtain a time difference of arrival of signals between base stations through simultaneous listening of positioning signals of multiple base stations by a terminal, so as to obtain two or more hyperbolic equations, and to determine the position of the terminal by solving the equation set. Generally, a reference signal time difference (RSTD) measurement value of each downlink positioning reference signal (DL PRS) includes transmission time errors and reception time errors from base stations and terminals.

[0003] However, in the prior art, the terminal can only report an RSTD measurement value based on a transmission reception point (TRP), and does not distinguish which channel is used for measurement, so that transmission time errors and reception time errors corresponding to the specific channel cannot be determined, that is, the reported RSTD measurement result includes transmission and reception time errors that cannot be completely eliminated by different channels. Therefore, the positioning server cannot determine the specific time errors corresponding to the RSTD measurement value reported by the terminal, and thus cannot accurately position the terminal. SUMMARY

[0004] In view of the problems in the prior art, the embodiments of the present application provide a DL-TDOA positioning method and device.

[0005] In a first aspect, the embodiments of the present application provide a downlink time difference of arrival (DL-TDOA) positioning method, applied to a terminal, and including the following steps.

[0006] Receiving a first message sent by a positioning server, the first message being used for requesting position information of the terminal, and the first message at least including indication information;

[0007] Based on the indication information, determining whether to use multiple reception channels to perform reference signal time difference (RSTD) measurement on a first downlink positioning reference signal (DL PRS).

[0008] Optionally, the first DL PRS is determined based on measurement configuration information included in the first message, or randomly selected by the terminal.

[0009] Optionally, the method further comprises:

[0010] In a case where the measurement configuration information is included in the first message and the indication information indicates that the terminal performs RSTD measurement on the first DL PRS by using multiple receiving channels, the first DL PRS is determined based on a DL PRS resource set ID and a DL PRS time-frequency domain resource included in the measurement configuration information.

[0011] Optionally, the determining whether to perform RSTD measurement on the first DL PRS by using multiple receiving channels based on the indication information further comprises:

[0012] In a case where the indication information indicates that the first DL PRS is measured by using multiple receiving channels, a first response message is sent, and the first response message at least includes measurement information of a specific receiving channel.

[0013] The measurement information of the specific receiving channel includes a reference timestamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a first time error group.

[0014] The reference timestamp is a measurement time of the specific receiving channel performing RSTD measurement on the first DL PRS.

[0015] Optionally, the first response message further includes measurement information of a first receiving channel.

[0016] The measurement information of the first receiving channel includes a relative timestamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a second time error group.

[0017] The relative timestamp is a relative value of a measurement timestamp of the first receiving channel performing RSTD measurement on the first DL PRS relative to the reference timestamp.

[0018] The first receiving channel is any one of the other receiving channels except the specific receiving channel in the multiple receiving channels.

[0019] Optionally, the first message further includes a required response time, and the first response message is sent if the RSTD measurement on the first DL PRS is completed within the required response time.

[0020] If the RSTD measurement of the first DL PRS is not completed within the required response time, a second response message is sent, which carries the reason for measurement failure.

[0021] Optionally, the reference timestamp is a measurement time at which the specific receiving channel performs the RSTD measurement on the first DL PRS, and the specific determination manner comprises:

[0022] Based on the measurement times at which the plurality of receiving channels perform the RSTD measurement on the first DL PRS, a receiving channel corresponding to an earliest measurement time among all the measurement times is determined as a specific receiving channel, and the earliest measurement time is a reference timestamp.

[0023] In a second aspect, the embodiments of the present application further provide a downlink time difference of arrival (DL-TDOA) positioning method, applied to a positioning server, comprising:

[0024] A first message is sent to a terminal, the first message being used for requesting position information of the terminal, and the first message at least comprising indication information, the indication information being used for indicating whether the terminal performs reference signal time difference (RSTD) measurement on a first downlink positioning reference signal (DL PRS) by using a plurality of receiving channels.

[0025] Optionally, the first message further comprises measurement configuration information, the measurement configuration information at least comprising a DL PRS resource set ID and a DL PRS time-frequency domain resource; and the measurement configuration information is used for determining the first DL PRS.

[0026] Optionally, the method further comprises:

[0027] In a case where the indication information indicates that the terminal performs the reference signal time difference (RSTD) measurement on the first downlink positioning reference signal (DL PRS) by using the plurality of receiving channels, a first response message sent by the terminal is received, the first response message comprising measurement information of a specific receiving channel and measurement information of a first receiving channel;

[0028] Based on a first time error group in the measurement information of the specific receiving channel, a second time error group in the measurement information of the first receiving channel, and a corresponding relationship between a time error group identifier and a receiving channel, it is determined whether the RSTD measurement value of the first DL PRS belongs to the same receiving channel.

[0029] The first receiving channel is any one of other receiving channels in the plurality of receiving channels except the specific receiving channel.

[0030] Optionally, the first message further comprises a required response time, for indicating that the terminal sends a first response message when the terminal completes the RSTD measurement of the first DL PRS within the required response time;

[0031] Or, for indicating that the terminal sends a second response message when the terminal does not complete the RSTD measurement of the first DL PRS within the required response time, the second response message carries a reason for measurement failure.

[0032] In a third aspect, the embodiments of the present application further provide an electronic device applied to a terminal, comprising a memory, a transceiver, and a processor, wherein:

[0033] The memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and implement the steps of the DL-TDOA positioning method of the first aspect.

[0034] In a fourth aspect, the embodiments of the present application further provide an electronic device applied to a network side, comprising a memory, a transceiver, and a processor, wherein:

[0035] The memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and implement the steps of the DL-TDOA positioning method of the second aspect.

[0036] In a fifth aspect, the embodiments of the present application further provide a device for downlink time difference of arrival (DL-TDOA) positioning, comprising:

[0037] A first receiving module is configured to receive a first message sent by a positioning server, the first message being used for requesting position information of a terminal, and the first message comprising at least indication information;

[0038] A first determining module is configured to determine whether to perform reference signal time difference (RSTD) measurement on a first downlink positioning reference signal (DL PRS) by using multiple receiving channels based on the indication information.

[0039] In a sixth aspect, the embodiments of the present application further provide a device for downlink time difference of arrival (DL-TDOA) positioning, comprising:

[0040] A second sending module is configured to send a first message to a terminal, the first message being used for requesting position information of the terminal, and the first message comprising at least indication information, the indication information being used for indicating whether the terminal performs reference signal time difference (RSTD) measurement on a first downlink positioning reference signal (DL PRS) by using multiple receiving channels.

[0041] In a seventh aspect, the embodiments of the present application further provide a computer readable storage medium, which stores a computer program, and the computer program is used for making a computer execute the steps of the DL-TDOA positioning method of the first aspect or the steps of the DL-TDOA positioning method of the second aspect.

[0042] The DL-TDOA positioning method and device provided by the embodiments of the present application are beneficial for the positioning server to determine the RSTD measurement value of each receiving channel and the corresponding time error, and further improve the positioning accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0044] Figure 1 is a schematic diagram of an NR DL-TDOA positioning method;

[0045] Figure 2 is a schematic diagram of a network architecture suitable for NG-RAN positioning;

[0046] Figure 3 is a schematic diagram of an LPP position information transmission process;

[0047] Figure 4 is a schematic diagram of one of the DL-TDOA positioning methods provided by the embodiments of the present application;

[0048] Figure 5 is a schematic diagram of another of the DL-TDOA positioning methods provided by the embodiments of the present application;

[0049] Figure 6 is a schematic diagram of one of the electronic devices provided by the embodiments of the present application;

[0050] Figure 7 is a schematic diagram of another of the electronic devices provided by the embodiments of the present application;

[0051] Figure 8 is one of structural schematic diagrams of the device for DL-TDOA positioning provided in an embodiment of the present application;

[0052] Figure 9 is one of structural schematic diagrams of the device for DL-TDOA positioning provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] In the embodiments of the present application, the term "and / or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after it.

[0054] In the embodiments of the present application, the term "a plurality of" means two or more, and other quantifiers are similar.

[0055] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0056] In order to help understand the solutions in the embodiments of the present application, the related concepts that can be involved in the present application will be briefly introduced as follows:

[0057] I. Basic principles and overview of DL-TDOA positioning method

[0058] The principle of DL-TDOA is to obtain the time difference of signals arriving between base stations through UE simultaneously listening to the positioning signals of multiple base stations, so as to obtain two or more hyperbolic equations, and determine the position of UE by solving the equation set. For the positioning method of NR DL-TDOA, in the 5G system, the location calculation can be supported on the positioning server or on the terminal side, that is, both the LMF-based mode and the UE-based mode are supported.

[0059] Figure 1 is a schematic diagram of the NR DL-TDOA positioning method, as Figure 1As shown, in the DL-TDOA positioning method, the UE knows the configuration information of the TRPs around the UE sending the downlink positioning reference signal (DL PRS) according to the DL-TDOA assistance data provided by the LMF, and obtains the downlink positioning reference signal time difference of arrival (DL PRS RSTD) by receiving the DL PRS sent by each TRP. Then, the UE calculates the position of the UE by using the RSTD measurement value of the DL PRS obtained by the UE and other known information (such as the geographic coordinates of the TRP) in a network-based positioning manner or a UE-based positioning manner. If the network-based positioning manner is adopted, the UE reports the RSTD measurement value of the DL PRS obtained by the UE to the LMF, and the LMF calculates the position of the UE by using the reported measurement value and other known information (such as the geographic coordinates of the TRP). If the UE-based positioning manner is adopted, the UE calculates the position of the UE itself by using the RSTD of the DL PRS obtained by the UE and other information provided by the network (such as the geographic coordinates of the TRP).

[0060] The RSTD measurement value of each DL PRS is the difference between the arrival times of the DL PRS received by the UE from two TRPs (one of which is a reference TRP). The RSTD measurement value of each DL PRS (when converted to a distance) can form a hyperbola, the foci of the hyperbola are the positions of the two TRPs, and the difference between the distances of any point on the hyperbola to the two TRPs corresponds to the time of the RSTD measurement value. The UE is located at a certain point on the hyperbola. If the UE obtains N-1 DL PRS RSTD measurement values from N TRPs, a system of N-1 hyperbolic equations can be formed. The position of the UE can be obtained by solving the system of hyperbolic equations.

[0061] II. Network architecture for Next Generation Radio Access network (NG-RAN) positioning

[0062] Figure 2 is a schematic diagram of a network architecture suitable for NG-RAN positioning, as Figure 2 As shown, the LMF is a positioning server responsible for selecting a positioning method and triggering corresponding positioning measurements, and can calculate the final result and accuracy of positioning. The LMF can interact with multiple NG-RAN nodes to provide assistance data information for broadcast. The LMF can optionally segment and / or encrypt the assistance data information for broadcast. The LMF can also interact with the Access and Mobility Management Function (AMF) to provide encryption key data information to the AMF;

[0063] NG-RAN: can send positioning reference signals or make positioning measurements based on assistance information;

[0064] User Equipment (UE): can send positioning reference signals or make positioning measurements based on assistance information; can also calculate the final positioning result and accuracy based on the measurement results.

[0065] Next Generation Evolved NodeB (NG-eNB): can broadcast assistance data information received from LMF in the positioning system information message.

[0066] Next Generation NodeB (gNB): can broadcast assistance data information received from LMF in the positioning system information message;

[0067] Enhanced Serving Mobile Location Centre (E-SMLC): manages the coordination and scheduling of all resources required to find the location of a UE attached to E-UTRAN;

[0068] SUPL Enabled Terminal (SET): usually refers to a terminal that enables SUPL service;

[0069] In addition, the relevant nodes and connection relationships in the figure are as follows: Figure 2

[0070] Figure 2 The nodes in the figure also include: Transmission Point (TP), Secure User Plane Location Platform (SUPL Location Platform, SLP);

[0071] LTE-Uu is the interface between UE and NG-eNB, NR-Uu is the interface between UE and gNB, NG-C is the interface between NG-eNB and AMF, or the interface between gNB and AMF, and NLs is the interface between AMF and LMF.

[0072] III. Lightweight Presentation Protocol (LPP) Positioning Information Transmission Process

[0073] ​The purpose of the Position Information Transfer procedure is to enable the server to request measurement data or position estimate from the target device, and also to enable the target device to transfer positioning measurement data or position estimate to the server without a request from the server.

[0074] Figure 3 Figure 1 is a flow diagram of the LPP Position Information Transfer procedure, as shown in Figure 3

[0075] 1. The server requests position information from the target device by sending a Request Location Information message and indicates the kind of position information needed.

[0076] 2. The target device sends a Provide Location Information message to the server to transfer position information. The transferred position information should match the requested information in step one or be a subset of the requested information in step one.

[0077] Four. Definition of Transmit Time Error, Receive Time Error, User Equipment Receive Time Error Group and User Equipment Transmit Time Error Group

[0078] Transmit timing error (Tx timing error): From the point of view of signal transmission, there is a time delay between the generation of a digital signal from the baseband and the emission of a radio frequency signal from the transmitting antenna. In order to support positioning, the terminal can perform internal calibration / compensation of the transmission time of the downlink positioning reference signal / uplink positioning reference signal. However, the calibration cannot completely cancel the error, and the remaining transmission time delay after calibration or the uncalibrated transmission time delay is defined as the transmission timing error.

[0079] Receive timing error (Rx timing error): From the point of view of signal reception, there is a time delay between the time when a radio frequency signal reaches the receiving antenna and the time when the signal is digitized and time-stamped at the baseband. In order to support positioning, the terminal can perform internal calibration / compensation of the transmission time before reporting the measurement values obtained from the downlink positioning reference signal / uplink positioning reference signal, but the calibration cannot completely cancel the error, and the remaining reception time delay after calibration or the uncalibrated reception time delay is defined as the reception timing error.

[0080] User Equipment Receive Time Error Group (UE Rx TEG): A UE Rx TEG is associated with one or more downlink measurements, and the transmission time errors of these measurements are within a certain range. The errors of any two downlink measurements associated with the same UE Rx TEG are within a certain range.

[0081] ​User Equipment Transmit Time Error Group (UE TxTEG): A UE Tx TEG is associated with the transmission of one or more uplink reference signal resources for positioning purposes, the transmission timing error of which is within a certain range. The error between the terminal transmission times of any two Uplink Sounding Reference Signal (UL SRS) resources associated with the same UE Tx TEG is within a certain range.

[0082] Figure 4 is a flowchart of a method of DL-TDOA positioning provided by an embodiment of the application, as shown in Figure 4 A method of DL-TDOA positioning is provided by an embodiment of the application, the execution subject of which is a terminal, and the method comprises the following steps:

[0083] Step 401: receiving a first message sent by a positioning server, the first message being used to request the position information of the terminal, the first message at least comprising indication information;

[0084] Step 402: determining, based on the indication information, whether to perform Reference Signal Time Difference (RSTD) measurement on a first Downlink Positioning Reference Signal (DL PRS) by using multiple receiving channels.

[0085] Specifically, the positioning server sends a first message to request the position information of the terminal, the first message can be an LPP Request Location Information message, and the request at least comprises indication information. The terminal determines, based on the indication information, whether to perform RSTD measurement on a first DL PRS by using multiple receiving channels. The first DL PRS refers to any DL PRS, i.e., whether the terminal performs RSTD measurement on the same DL PRS by using multiple receiving channels. The first message can be various request messages, such as an LPP Request Location Information message. The positioning server indicates, in the LPP Request Location Information message, whether the terminal can perform RSTD measurement on the same downlink positioning reference resource by using multiple receiving channels. If the indication information in the first message does not indicate that the terminal performs RSTD measurement on the same downlink positioning reference signal by using multiple receiving channels, the terminal performs RSTD measurement on the DL PRS according to the existing process, i.e., performs RSTD measurement on one DL PRS by using multiple receiving channels, and the measurement result does not include the related information of the receiving channel, such as the specific identifier of the receiving channel, the time error corresponding to the receiving channel, etc.

[0086] If the indication information in the first message indicates that the terminal performs RSTD measurement on the same downlink positioning reference signal using multiple receiving channels, the terminal can perform RSTD measurement on the same DL PRS through multiple receiving channels and report specific receiving channel information.

[0087] The method for DL-TDOA positioning provided by the embodiments of the present application indicates in the request for the terminal position information that the terminal can perform reference signal time difference RSTD measurement on the same downlink positioning reference resource DL PRS using multiple receiving channels. After measurement, the terminal includes the RSTD measurement value of multiple receiving channels and the corresponding time stamp, and the time error information corresponding to each receiving channel in the corresponding response message, and reports the same. This is beneficial for the positioning server to determine the RSTD measurement value of each receiving channel and the corresponding time error, thereby improving the positioning accuracy.

[0088] Optionally, the first DL PRS is determined based on the measurement configuration information included in the first message or randomly selected by the terminal.

[0089] Specifically, the first message sent by the positioning server received by the terminal can carry measurement configuration information. The terminal can determine which downlink positioning reference signal DL PRS included in the same transmission receiving point TRP and the time-frequency domain resource occupied by the positioning reference signal based on the measurement configuration information, and perform RSTD measurement based on the downlink positioning reference signal configured by the positioning server to determine the positioning information of the terminal. Or the terminal randomly selects a certain downlink positioning reference signal DL PRS for RSTD measurement and reports the related configuration information, resource occupation information and corresponding RSTD measurement value of the DL PRS for accurate positioning of the terminal.

[0090] Optionally, the method further comprises:

[0091] In the case where the measurement configuration information is included in the first message and the indication information indicates that the terminal performs RSTD measurement on the first DL PRS using multiple receiving channels, the first DL PRS is determined based on the DL PRS resource set ID and the DL PRS time-frequency domain resource included in the measurement configuration information.

[0092] Specifically, the terminal indicates that the terminal performs RSTD measurement on the first DL PRS by multiple receiving channels in the first message sent by the positioning server, the first DL PRS refers to any one DL PRS, that is, the terminal performs RSTD measurement on the same DL PRS by multiple receiving channels, and the first message includes measurement configuration information, the measurement configuration information includes a DL PRS resource set ID and a DL PRS time-frequency domain resource; according to the measurement configuration information, the information of the first DL PRS and the time domain and / or frequency domain resources occupied by the DL PRS are determined.

[0093] The DL PRS resource set ID represents a group of DL PRSs of the same transmission and reception point TRP, and each DL PRS can be represented by the form of a DL PRS ID. The DL PRS time-frequency domain resource represents the time-frequency domain resource allocated to each DL PRS represented by the DL PRS ID, and each DL PRS ID has corresponding allocated time domain and / or frequency domain resources. Through the measurement configuration information, it can be determined which DL PRS the terminal specifically performs RSTD measurement on, and the time-frequency domain resources occupied by the DL PRS, that is, the same DL PRS in the RSTD measurement on the same DL PRS by multiple receiving channels.

[0094] Optionally, based on the indication information, it is determined whether to perform RSTD measurement on the first DL PRS by multiple receiving channels, and the method further includes:

[0095] In the case where the indication information indicates that the first DL PRS is measured by multiple receiving channels, a first response message is sent, and the first response message at least includes measurement information of a specific receiving channel;

[0096] The measurement information of the specific receiving channel includes a reference timestamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a first time error group.

[0097] The reference timestamp is the measurement time of the specific receiving channel performing RSTD measurement on the first DL PRS.

[0098] Specifically, in the case that the terminal receives an indication from the positioning server that the terminal performs RSTD measurement on the first DL PRS using multiple receiving channels, i.e., the terminal performs RSTD measurement on the same DL PRS using multiple receiving channels, the terminal completes the above-mentioned RSTD measurement and needs to report the measurement results to the positioning server. The specific reporting information is sent to the positioning server through a first response message, which can be an LPP Provide Location Information message, and the first response message includes at least the measurement information of the terminal through a specific receiving channel. The specific receiving channel measurement information includes: a reference timestamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a first time error group, etc. In addition, the first response message can also include the reference signal receiving power (RSRP) measurement value of the DL PRS or the reference signal receiving quality (RSRQ) measurement value of the DL PRS. The content items included in the reported measurement information can be adjusted according to the actual business needs, that is, other content items can be added, or some of the above listed content items can be reduced.

[0099] The reference timestamp is the measurement time of the specific receiving channel performing RSTD measurement on the first DL PRS.

[0100] The above-mentioned DL PRS resource set ID includes a group of DL PRS IDs of the same transmission and reception point (TRP).

[0101] The above-mentioned DL PRS time-frequency domain resource is all the DL PRS IDs under the TRP, and the configuration parameters of the downlink time-frequency resource corresponding to the DL PRS ID.

[0102] The above-mentioned first time error group includes the time error group and the corresponding error value of the terminal on the specific receiving channel; and the time errors of one or more DL PRSs belonging to the specific receiving channel are the same. The above-mentioned error value is the specific time error value calculated by the terminal after transmitting and receiving the same signal on the specific receiving channel.

[0103] The above-mentioned specific receiving channel can be any one of the multiple receiving channels indicated by the positioning server, and the above-mentioned multiple receiving channels are different receiving channels determined by the terminal according to the distribution of its own antenna. After determining the specific receiving channel, the measurement information of other receiving channels is determined based on the measurement information of the specific receiving channel, and the measurement information here mainly refers to the measurement time of the RSTD measurement on multiple receiving channels.

[0104] Optionally, the first response message further comprises measurement information of the first receiving channel;

[0105] The measurement information of the first receiving channel comprises a relative time stamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a second time error group.

[0106] The relative time stamp is a relative value of a measurement time stamp of the first receiving channel for the RSTD measurement of the first DL PRS relative to a reference time stamp.

[0107] The first receiving channel is any one of the other receiving channels except the specific receiving channel in the plurality of receiving channels.

[0108] Specifically, when the terminal performs the RSTD measurement on the first DL PRS by using the plurality of receiving channels, not only the measurement information of the specific receiving channel serving as a reference needs to be reported, but also the measurement information of the first receiving channel needs to be reported, where the first receiving channel is any one of the other receiving channels except the specific receiving channel in the plurality of receiving channels, and there can be one or more.

[0109] All the first receiving channels and the specific receiving channel constitute all the receiving channels of the terminal for the RSTD measurement on the first DL PRS.

[0110] The measurement information of the first receiving channel and the measurement information of the specific receiving channel are basically the same, and specifically comprise a relative time stamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a second time error group.

[0111] The relative time stamp is a relative value of a measurement time of the first receiving channel for the RSTD measurement on the first DL PRS relative to a reference time stamp, and can be positive or negative.

[0112] The second time error group comprises a time error group identifier and a corresponding error value of the terminal on the first receiving channel. The time error group identifier can be represented in the form of a time error group ID. Thus, according to the second time error group, it can be determined that the specific time error on the first receiving channel is how much and belongs to which time error group ID. There can be multiple first receiving channels with the same time error value, which can be regarded as the same receiving channel. The error value is a specific time error value calculated by the terminal on the first receiving channel by transmitting and receiving the same signal through a baseband.

[0113] Similarly, the positioning server can also determine the specific receiving channel according to a first time error group included in the measurement information of the specific receiving channel, the first time error group including: a time error group identifier and a corresponding error value, the time error group identifier can be represented in the form of a time error group ID. The positioning server can determine whether the receiving channels are the same according to the time error group ID, and can also determine whether the time errors of the multiple receiving channels are the same according to the time error value included in the time error group.

[0114] Optionally, the first message further includes a required response time, and if the RSTD measurement of the first DL PRS is completed within the required response time, the first response message is sent;

[0115] If the RSTD measurement of the first DL PRS is not completed within the required response time, a second response message is sent, and the second response message carries the reason for the measurement failure.

[0116] Specifically, in order to reduce the waiting time and efficiently utilize the existing network resources, the first message sent by the positioning server can also include a required response time, that is, the response message sent by the terminal within the required response time is considered valid. Within the above required response time, the terminal completes the RSTD measurement of the first DL PRS, and then sends the first response message. If the terminal exceeds the required response time and has not completed the RSTD measurement of the first DL PRS, it can be that the terminal UE cannot perform the requested measurement, or the required response time has been reached before any requested measurement result is obtained, and then the terminal returns a second response message, which includes the reason for the measurement failure, that is, the reason why the terminal does not provide the measurement result.

[0117] Optionally, the reference timestamp is the measurement time of the RSTD measurement of the DL PRS by the specific receiving channel, and the specific determination method includes:

[0118] Based on the measurement time of the RSTD measurement of the first DL PRS by the multiple receiving channels, the receiving channel corresponding to the earliest measurement time among all the measurement times is determined as the specific receiving channel, and the earliest measurement time is the reference timestamp.

[0119] Specifically, when the terminal reports the measurement information of the specific receiving channel, the measurement time when the terminal performs the RSTD measurement on the first DL PRS through the specific receiving channel is included, i.e., the specific time when the measurement is performed. When the terminal performs the RSTD measurement on the first DL PRS through multiple receiving channels, there are multiple measurement times, and the receiving channel corresponding to the earliest measurement time is determined as the specific receiving channel, and the earliest measurement time is the reference timestamp. If there are multiple earliest measurement times, one of them can be randomly selected as the reference timestamp. In addition, the reference timestamp can also be any one of the measurement times when the terminal performs the RSTD measurement on the first DL PRS through different receiving channels.

[0120] The method for DL-TDOA positioning provided by the embodiments of the present application is that the positioning server indicates in the request for the position information of the terminal that the terminal can perform the RSTD measurement on the same DL PRS through multiple receiving channels. After the measurement of the terminal, the RSTD measurement values of the multiple receiving channels and the corresponding timestamps are included in the corresponding response message, and the corresponding time error information of each receiving channel is included and reported. This is beneficial for the positioning server to determine the RSTD measurement values of each receiving channel and the corresponding time error, thereby improving the positioning accuracy.

[0121] Figure 5 FIG. 2 is a flowchart of a method for DL-TDOA positioning provided by the embodiments of the present application, as shown in the figure, the method is applied to a terminal, and includes the following steps. Figure 5

[0122] In step 501, a first message is sent to the terminal, and the first message is used to request the position information of the terminal. The first message at least includes indication information, and the indication information is used to indicate whether the terminal performs the RSTD measurement on the first DL PRS through multiple receiving channels.

[0123] Specifically, in order to obtain the positioning information of the terminal, the positioning server sends a first message to the terminal, and the first message at least includes indication information, and the indication information is used to indicate whether the terminal performs the RSTD measurement on the first DL PRS through multiple receiving channels. The first message can be an LPP request position information message. The first DL PRS refers to any DL PRS, i.e., whether the terminal performs the RSTD measurement on the same DL PRS through multiple receiving channels.

[0124] ​If the indication information in the first message does not indicate that the terminal uses multiple receiving channels to perform RSTD measurement on the same downlink positioning reference signal, the terminal performs RSTD measurement on the DL PRS according to the existing process, that is, performs RSTD measurement on one DL PRS through multiple receiving channels, and the measurement result does not include related information of the receiving channel, such as the specific identifier of the receiving channel, the time error corresponding to the receiving channel, and the like.

[0125] If the indication information in the first message indicates that the terminal uses multiple receiving channels to perform RSTD measurement on the same downlink positioning reference signal, the terminal can perform RSTD measurement on the same DL PRS through multiple receiving channels and report specific receiving channel information.

[0126] The method for DL-TDOA positioning provided by the embodiments of the present application is that the positioning server indicates in the request for the position information of the terminal that the terminal can use multiple receiving channels to perform reference signal time difference RSTD measurement on the same downlink positioning reference resource DL PRS. After the terminal performs measurement, the terminal includes the RSTD measurement value of the multiple receiving channels and the corresponding time stamp, and the time error information corresponding to each receiving channel in the corresponding response message, and reports the same. This is beneficial for the positioning server to determine the RSTD measurement value of each receiving channel and the corresponding time error, and further improves the positioning accuracy.

[0127] Optionally, the first message further includes measurement configuration information, the measurement configuration information at least including a DL PRS resource set ID and a DL PRS time-frequency domain resource; the measurement configuration information is used to determine the first DL PRS.

[0128] Specifically, when the first message sent by the positioning server indicates that the terminal uses multiple receiving channels to perform RSTD measurement on the first DL PRS, the first DL PRS refers to any DL PRS, that is, when the first message sent by the positioning server indicates that the terminal uses multiple receiving channels to perform RSTD measurement on the same DL PRS, the first message sent by the positioning server can carry measurement configuration information, the measurement configuration information including a DL PRS resource set ID and a DL PRS time-frequency domain resource; according to the measurement configuration information, the first DL PRS and the information of the time domain and / or frequency domain resources occupied by the DL PRS are determined.

[0129] wherein, the DL PRS resource set ID represents a set of DL PRS identifications of the same transmission reception point (TRP), and each DL PRS identification can be represented by a form of DL PRS ID. The DL PRS time-frequency domain resource represents the time-frequency domain resource allocated to each DL PRS identification, and each DL PRS ID has corresponding allocated time domain and / or frequency domain resource. Through the measurement configuration information, it can be determined which DL PRS is used by the terminal for RSTD measurement, and the time-frequency domain resource occupied by the DL PRS, i.e., to determine the same DL PRS in the RSTD measurement of the same DL PRS by multiple receiving channels.

[0130] Optionally, the above method further comprises:

[0131] In the case where the indication information indicates that the terminal uses multiple receiving channels to perform reference signal time difference (RSTD) measurement on the first downlink positioning reference signal (DL PRS), a first response message sent by the terminal is received, and the first response message includes measurement information of a specific receiving channel and measurement information of a first receiving channel.

[0132] Based on the first time error group in the measurement information of the specific receiving channel and the second time error group in the measurement information of the first receiving channel, and the correspondence between the time error group identifier and the receiving channel, it is determined whether the RSTD measurement value of the received first DL PRS belongs to the same receiving channel.

[0133] wherein, the first receiving channel is any one of the other receiving channels in the above-mentioned multiple receiving channels except the specific receiving channel.

[0134] Specifically, in the case where the positioning server indicates that the terminal uses multiple receiving channels to perform RSTD measurement on the first DL PRS, i.e., in the case where the terminal uses multiple receiving channels to perform RSTD measurement on the same DL PRS, the terminal completes the above-mentioned RSTD measurement and needs to report the measurement result to the positioning server. The specific reporting information is sent to the positioning server through a first response message, and the first response message can be a location information message provided by LPP, and the first response message at least includes the measurement information of the terminal through the specific receiving channel. The measurement information of the specific receiving channel includes: reference timestamp, DL PRS resource set ID, DL PRS time-frequency domain resource, RSTD measurement value, and first time error group, etc. In addition, the first response message can also include the reference signal received power (RSRP) measurement value of the DL PRS or the reference signal received quality (RSRQ) measurement value of the DL PRS. According to the actual business needs, the content items included in the reported measurement information can be adjusted, i.e., new content items can be added, or some of the above-mentioned content items can be reduced.

[0135] In addition, the first response message can further include measurement information of a first receiving channel, where the first receiving channel is any one of the other receiving channels in the multiple receiving channels except for the specific receiving channel, and there can be one or more.

[0136] All the first receiving channels and the specific receiving channel constitute all the receiving channels for the terminal to perform RSTD measurement on the first DL PRS.

[0137] The measurement information of the first receiving channel and the measurement information of the specific receiving channel are substantially the same, and specifically include: a relative timestamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a second time error group;

[0138] The reference timestamp is a measurement time of the specific receiving channel performing RSTD measurement on the first DL PRS.

[0139] The DL PRS resource set ID includes a group of DL PRS identifiers of the same transmission and reception point (TRP); the identifier of the DL PRS can be represented by a DL PRS ID.

[0140] The DL PRS time-frequency domain resource includes all DL PRS IDs under the TRP and configuration parameters of the downlink time-frequency resource corresponding to the DL PRS ID.

[0141] The first time error group includes a time error group of the terminal on the specific receiving channel and a corresponding error value.

[0142] The relative timestamp is a relative value of the measurement time of the first receiving channel performing RSTD measurement on the first DL PRS relative to the reference timestamp; it can be positive or negative.

[0143] The second time error group includes a time error group identifier of the terminal on the first receiving channel and a corresponding error value; the time error group identifier can be represented in the form of a time error group ID.

[0144] The specific receiving channel can be any one of the multiple receiving channels indicated by the positioning server, and the multiple receiving channels are different receiving channels determined by the terminal according to the distribution of its own antenna. After the specific receiving channel is determined, the measurement information of the receiving channel is taken as a reference to determine the measurement information of the other receiving channels, where the measurement information mainly refers to the measurement time of performing RSTD measurement on the multiple receiving channels.

[0145] The positioning server can determine, according to the second time error group, what the specific time error on the first receiving channel is, which time error group ID it belongs to, and whether the time error values of multiple first receiving channels are the same. If the time error values of multiple first receiving channels are the same, the positioning server can determine, according to the time error group ID, whether the reported RSTD measurement values correspond to the same receiving channel.

[0146] Similarly, the positioning server can also determine, according to the first time error group included in the measurement information of a specific receiving channel, whether the multiple receiving channels have the same time error, by determining, according to the time error group ID, whether the receiving channels are the same, and by determining, according to the time error value included in the time error group, whether the time errors of the multiple receiving channels are the same.

[0147] Optionally, the first message further includes a required response time, which is used to indicate that, when the terminal completes the RSTD measurement of the first DL PRS within the required response time, the terminal sends the first response message.

[0148] Or, the required response time is used to indicate that, when the terminal does not complete the RSTD measurement of the first DL PRS within the required response time, the terminal sends the second response message, and the second response message carries the reason for the measurement failure.

[0149] Specifically, in order to reduce the waiting time and efficiently utilize the existing network resources, the first message sent by the positioning server can further include a required response time, that is, the response message sent by the terminal within the required response time is considered valid. Within the above required response time, the terminal completes the RSTD measurement of the first DL PRS, and then sends the first response message. If the terminal has not completed the RSTD measurement of the first DL PRS beyond the required response time, it can be that the terminal UE cannot perform the requested measurement, or the required response time has been reached before any requested measurement result is obtained. In this case, the terminal returns the second response message, which includes the reason for the measurement failure, that is, the reason why the terminal does not provide the measurement result.

[0150] The method for DL-TDOA positioning provided by the embodiments of the present application is beneficial to the positioning server to determine the RSTD measurement value of each receiving channel and the corresponding time error, thereby improving the positioning accuracy.

[0151] The method of DL-TDOA positioning provided by the present application is described below with specific examples.

[0152] The main process includes:

[0153] Step 1, the positioning server sends an LPP request for location information message to the terminal. The request includes an indication of the requested DL-TDOA measurements, including any required measurement configuration information and a required response time.

[0154] Step 2, the terminal obtains DL-TDOA measurement values according to the request in step 1. Then, within the response time provided in step 1, the terminal sends an LPP provide location information message to the positioning server and includes the obtained RSTD measurement values of the DL PRS and the DL-PRS-RSRP measurement (optional). If the UE cannot perform the requested measurements, or the response time has elapsed before any requested measurements are obtained, the UE includes in the LPP provide location information message a cause for not providing location information, and can also include other available information.

[0155] 2.1, the terminal receives the LPP request for location information message and the message indicates that the terminal can perform RSTD measurements on the same downlink positioning reference resource using different reception channels, the terminal performs measurements on the downlink positioning reference signal resources indicated in the message and obtains RSTD measurement values based on different channels. The terminal reports the RSTD measurement values of the measurement channels and a reference timestamp to the positioning server.

[0156] The reference timestamp can be the earliest time at which the terminal performs measurements on the downlink positioning reference signal resources, or the time corresponding to an optional RSTD measurement value of the terminal.

[0157] 2.2, the terminal can optionally perform RSTD measurements on other channels (in addition to the channel corresponding to the reference timestamp) in the multiple different channels in which measurements are performed, and report the selected RSTD measurement values and the relative values of the measurement timestamps corresponding to the reference timestamp.

[0158] The measurement information of each channel can include the measured downlink positioning reference signal resource set ID, the downlink positioning reference signal resource ID, the specific RSTD measurement value, the terminal transmission time error group ID, and the variable of the channel measurement timestamp relative to the reference timestamp.

[0159] Specifically, the terminal reports the RSTD information based on different reception channels as follows:

[0160] The optional one channel reports its corresponding measurement information, including a reference timestamp, a downlink positioning reference signal resource set ID, a downlink positioning reference signal resource ID, a specific RSTD measurement value, and a terminal sending time error group ID and corresponding value;

[0161] The optional multiple RSTDs on the remaining channels report their corresponding measurement information, including a timestamp variable relative to the reference timestamp, a downlink positioning reference signal resource set ID, a downlink positioning reference signal resource ID, an RSTD measurement value, and a terminal sending time error group ID and corresponding value.

[0162] Step 3, the terminal can identify different channels and determine the terminal sending time error group ID. The time error group ID is associated with the receiving channel. The positioning server can identify whether the received RSTD measurement value is from the same channel according to the sending time error group ID.

[0163] The positioning server indicates whether the terminal can perform RSTD measurement on the same downlink positioning reference resource with different receiving channels through the LPP request location information indication. The positioning server can optionally indicate which PRS resources the terminal uses for the multi-channel measurement of RSTD. After the terminal measures, the terminal provides the RSTD measurement value and the reference timestamp based on the UE receiving channel in the LPP provide location information message, and reports the RSTD measurement value on the optional remaining channels and the variable of the corresponding timestamp relative to the reference timestamp. The positioning server selects the appropriate receiving channel RSTD measurement value and the corresponding timestamp to make accurate calibration for RSTD, to compensate for the error caused by the corresponding measurement channel, and to further improve the positioning accuracy.

[0164] Figure 6 is one of the structural schematic diagrams of the electronic device provided by the embodiments of the present application, as Figure 6 shown, the electronic device is applied to a terminal and includes a memory 620, a transceiver 610, and a processor 600; wherein:

[0165] The memory 620 is used to store a computer program; the transceiver 610 is used to transceive data under the control of the processor 600. The processor 600 is used to read the computer program in the memory 620 and perform the following operations:

[0166] receive a first message sent by a positioning server, the first message being used to request location information of the terminal, and the first message at least including indication information;

[0167] determine whether to perform reference signal time difference RSTD measurement on a first downlink positioning reference signal DLPRS with multiple receiving channels based on the indication information.

[0168] wherein, in Figure 6In particular embodiments, bus architecture can include any number of interconnecting buses and bridges, depending on the specific application of processor 600 and the overall design constraints. Bus architecture can link together various circuits such as one or more processors represented by processor 600, the various circuits of memory 620, and can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, all of which are well known in the art, and therefore, will not be described in further detail herein. Bus interface provides an interface to bus architecture. Transceiver 610 can be a plurality of elements including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including a wireless channel, a wired channel, optical cable, and the like. User interface 630 can also be an interface to devices such as keyboards, displays, speakers, microphones, joysticks, or other devices depending on the particular user device, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, etc.

[0169] Processor 600 is responsible for managing the bus architecture and general processing, including the execution of software stored in memory 620.

[0170] Processor 600 can be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD).

[0171] Optionally, the first DL PRS is determined based on measurement configuration information included in the first message, or randomly selected by the terminal.

[0172] Optionally, the operations further include:

[0173] In a case where the measurement configuration information is included in the first message and the indication information indicates that the terminal performs RSTD measurement on the first DL PRS using multiple receiving channels, the first DL PRS is determined based on the DL PRS resource set ID and the DL PRS time-frequency domain resource included in the measurement configuration information.

[0174] Optionally, determining whether to perform RSTD measurement on the first DL PRS using multiple receiving channels based on the indication information further includes:

[0175] In a case where the indication information indicates that the multiple receiving channels are used to measure the RSTD of the first DL PRS, a first response message is sent, the first response message including at least measurement information of a specific receiving channel;

[0176] The measurement information of the specific receiving channel includes a reference timestamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a first time error group.

[0177] The reference timestamp is a measurement time at which the specific receiving channel measures the RSTD of the first DL PRS.

[0178] Optionally, the first response message further includes measurement information of a first receiving channel.

[0179] The measurement information of the first receiving channel includes a relative timestamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a second time error group.

[0180] The relative timestamp is a relative value of a measurement timestamp at which the first receiving channel measures the RSTD of the first DL PRS relative to the reference timestamp.

[0181] The first receiving channel is any one of the other receiving channels than the specific receiving channel in the multiple receiving channels.

[0182] Optionally, the first message further includes a required response time, and the first response message is sent if the RSTD measurement of the first DL PRS is completed within the required response time.

[0183] If the RSTD measurement of the first DL PRS is not completed within the required response time, a second response message is sent, the second response message carrying a reason for the measurement failure.

[0184] Optionally, the reference timestamp is a measurement time at which the specific receiving channel measures the RSTD of the first DL PRS, and the specific determination manner includes:

[0185] Based on the measurement times at which the multiple receiving channels measure the RSTD of the first DL PRS, a receiving channel corresponding to an earliest measurement time among all the measurement times is determined as the specific receiving channel, and the earliest measurement time is the reference timestamp.

[0186] It should be noted that the above electronic device provided by the embodiments of the present application can implement all the method steps achieved by the method embodiments of the above execution subject being the terminal, and achieve the same technical effects. Therefore, the same or corresponding parts and beneficial effects of the method embodiments will not be described in detail.

[0187] Figure 7 This is a second schematic diagram of the structure of the electronic device provided in the embodiments of this application, as shown below. Figure 7 As shown, this electronic device is used in a positioning server and includes a memory 720, a transceiver 710, and a processor 700; wherein:

[0188] The memory 720 is used to store computer programs; the transceiver 710 is used to send and receive data under the control of the processor 700. The processor 700 is used to read the computer program in the memory 720 and perform the following operations:

[0189] A first message is sent to the terminal. The first message is used to request the location information of the terminal. The first message includes at least indication information, which is used to indicate whether the terminal uses multiple receiving channels to perform reference signal time difference (RSTD) measurement on the first downlink positioning reference signal (DLPRS).

[0190] Specifically, the transceiver 710 is used to receive and send data under the control of the processor 700.

[0191] Among them, Figure 7 In this application, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 700 and memory represented by memory 720 together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be further described herein. The bus interface provides an interface. The transceiver 710 can be multiple elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium, including wireless channels, wired channels, optical fibers, and other transmission media.

[0192] The processor 700 is responsible for managing the bus architecture and general processing, while the memory 720 can store the data used by the processor 700 during operation.

[0193] The processor 700 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

[0194] Optionally, the first message further comprises measurement configuration information, the measurement configuration information at least comprising a DL PRS resource set ID and a DL PRS time-frequency domain resource; the measurement configuration information is used to determine the first DL PRS.

[0195] Optionally, the operations further comprise:

[0196] In a case where the indication information indicates that the terminal adopts multiple receiving channels to perform reference signal time difference (RSTD) measurement on the first DL PRS, receiving a first response message sent by the terminal, the first response message comprising measurement information of a specific receiving channel and measurement information of a first receiving channel;

[0197] determining, based on a first time error group in the measurement information of the specific receiving channel and a second time error group in the measurement information of the first receiving channel, and a correspondence between a time error group identifier and a receiving channel, whether the RSTD measurement values of the first DL PRS belong to the same receiving channel;

[0198] wherein the first receiving channel is any one of the other receiving channels in the multiple receiving channels except the specific receiving channel.

[0199] Optionally, the first message further comprises a required response time, which is used to indicate that, when the terminal completes the RSTD measurement on the first DL PRS within the required response time, the terminal sends the first response message;

[0200] or, when the terminal does not complete the RSTD measurement on the first DL PRS within the required response time, the terminal sends a second response message, the second response message carrying a reason for measurement failure.

[0201] It should be noted that the above electronic device provided by the embodiments of the present application can realize all the method steps achieved by the method embodiments of the execution subject being the positioning server, and achieve the same technical effects. Therefore, the same or corresponding parts and beneficial effects of the method embodiments will not be described in detail herein.

[0202] Figure 8 is one of the structural diagrams of the device for DL-TDOA positioning provided by the embodiments of the present application, as shown in Figure 8 The device comprises:

[0203] The first receiving module 801 is configured to receive a first message sent by a positioning server, the first message being used to request position information of a terminal, and the first message at least comprising indication information.

[0204] The first determining module 802 is configured to determine, based on the indication information, whether to perform reference signal time difference (RSTD) measurement on the first downlink positioning reference signal (DL PRS) by using the multiple receiving channels.

[0205] Optionally, the first DL PRS is determined based on measurement configuration information included in the first message or randomly selected by the terminal.

[0206] Optionally, the first determining module 802 is further configured to:

[0207] In a case where the first message includes the measurement configuration information and the indication information indicates that the terminal performs the RSTD measurement on the first DL PRS by using the multiple receiving channels, the first DL PRS is determined based on a DL PRS resource set ID and a DL PRS time-frequency domain resource included in the measurement configuration information.

[0208] Optionally, the apparatus further includes a first sending module 803 configured to:

[0209] In a case where the indication information indicates that the RSTD measurement on the first DL PRS is performed by using the multiple receiving channels, the first sending module 803 is configured to send a first response message, the first response message including at least measurement information of a specific receiving channel.

[0210] The measurement information of the specific receiving channel includes a reference timestamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a first time error group.

[0211] The reference timestamp is a measurement time of the RSTD measurement on the first DL PRS by the specific receiving channel.

[0212] Optionally, the first response message further includes measurement information of a first receiving channel.

[0213] The measurement information of the first receiving channel includes a relative timestamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a second time error group.

[0214] The relative timestamp is a relative value of a measurement timestamp of the RSTD measurement on the first DL PRS by the first receiving channel relative to the reference timestamp.

[0215] The first receiving channel is any one of the other receiving channels than the specific receiving channel in the multiple receiving channels.

[0216] Optionally, the first sending module 803 is further configured to: the first message further includes a required response time, and the first sending module 803 is configured to send the first response message if the RSTD measurement on the first DL PRS is completed within the required response time.

[0217] If the RSTD measurement on the first DL PRS is not completed within the required response time, a second response message is sent, which carries the reason for the measurement failure.

[0218] Optionally, the reference timestamp is a measurement time at which the specific receiving channel performs the RSTD measurement on the first DL PRS, and the specific determination manner comprises:

[0219] Based on the measurement time at which the plurality of receiving channels perform the RSTD measurement on the first DL PRS, a receiving channel corresponding to an earliest measurement time among all the measurement times is determined as the specific receiving channel, and the earliest measurement time is the reference timestamp.

[0220] It should be noted that the above-mentioned DL-TDOA positioning apparatus provided by the embodiments of the present application can realize all the method steps achieved by the method embodiments of the above-mentioned execution subject being the terminal, and can achieve the same technical effects, and the same or corresponding parts and beneficial effects of the method embodiments in the embodiments will not be described in detail here.

[0221] Figure 9 is a structure diagram of a DL-TDOA positioning apparatus provided by the embodiments of the present application, as shown in Figure 9 The apparatus comprises:

[0222] The second sending module 901 is configured to send a first message to the terminal, the first message being used to request the position information of the terminal, and the first message at least comprising indication information, the indication information being used to indicate whether the terminal performs reference signal time difference RSTD measurement on a first downlink positioning reference signal DL PRS by using a plurality of receiving channels.

[0223] Optionally, the first message further comprises measurement configuration information, the measurement configuration information at least comprising a DL PRS resource set ID and a DL PRS time-frequency domain resource; and the measurement configuration information is used to determine the first DL PRS.

[0224] Optionally, the apparatus further comprises a second receiving module 902, configured to:

[0225] In a case where the indication information indicates that the terminal performs reference signal time difference RSTD measurement on the first downlink positioning reference signal DL PRS by using a plurality of receiving channels, a first response message sent by the terminal is received, the first response message comprising measurement information of the specific receiving channel and measurement information of the first receiving channel.

[0226] determine whether the RSTD measurement value of the first DL PRS belongs to the same receiving channel based on the first time error group in the measurement information of the specific receiving channel, the second time error group in the measurement information of the first receiving channel, and the correspondence between the time error group identifier and the receiving channel;

[0227] wherein the first receiving channel is any one of the other receiving channels than the specific receiving channel in the plurality of receiving channels.

[0228] Optionally, the first message further comprises a required response time, for indicating that the terminal sends the first response message when completing the RSTD measurement of the first DL PRS within the required response time.

[0229] Or, for indicating that the terminal sends the second response message when not completing the RSTD measurement of the first DL PRS within the required response time, the second response message carrying a reason for measurement failure.

[0230] It should be noted that the above DL-TDOA positioning apparatus provided by the embodiments of the present application can realize all the method steps achieved by the method embodiments of the above execution subject being the positioning server, and can achieve the same technical effects, and the same or corresponding parts and beneficial effects of the method embodiments in the embodiments will not be described in detail.

[0231] It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and another division mode can be used in actual implementation. In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware, or in the form of a software functional unit.

[0232] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a processor-readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in part, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, and various other media that can store program codes.

[0233] In another aspect, the embodiments of the present application also provide a computer readable storage medium, which stores a computer program. The computer program is used to make a computer execute the steps of the method of DL-TDOA positioning provided by the method embodiments.

[0234] Specifically, the above computer readable storage medium provided by the embodiments of the present application can realize all the method steps realized by the above method embodiments, and can achieve the same technical effects. Here, the same parts and beneficial effects in the method embodiments will not be described in detail.

[0235] The processor-readable storage medium can be any available medium or data storage device that the processor can access, including but not limited to a magnetic storage (such as a floppy disk, a hard disk, a magnetic tape, a magneto-optical disk (MO), etc.), an optical storage (such as a CD, a DVD, a BD, a HVD, etc.), and a semiconductor memory (such as a ROM, an EPROM, an EEPROM, a non-volatile memory (NAND FLASH), a solid state disk (SSD)), etc.

[0236] The technical solutions provided by the embodiments of the present application can be applied to various systems, especially 5G systems. For example, the applicable systems can be global system of mobile communication (GSM) systems, code division multiple access (CDMA) systems, wideband code division multiple access (WCDMA) general packet radio service (GPRS) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, long term evolution advanced (LTE-A) systems, universal mobile system (UMTS), worldwide interoperability for microwave access (WiMAX) systems, 5G new radio (NR) systems, and the like. Among these various systems, there are terminal devices and network devices. The system can also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), and the like.

[0237] The network device involved in the embodiments of the present application can be a base station, which can include multiple cells serving terminals. According to different application scenarios, the base station can also be referred to as an access point, or can be a device in an access network that communicates with wireless terminal devices through one or more sectors over an air interface, or other names. The network device can be used to exchange received air frames and Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which can include an Internet Protocol (IP) communication network. The network device can also coordinate the management of the properties of the air interface. For example, the network device involved in the embodiments of the present application can be a network device (Base Transceiver Station, BTS) in the Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolved network device (evolutional Node B, eNB or e-NodeB) in a long term evolution (LTE) system, or a 5G base station (gNB) in a next generation system, or a Home evolved Node B (HeNB), a relay node, a femto, a pico, etc., which are not limited in the embodiments of the present application. In some network structures, the network device can include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit can also be geographically separated.

[0238] The terminal referred to in the embodiments of the present application can be a device that provides voice and / or data connectivity to a user, a handheld device having wireless connection capability, or other processing devices connected to a wireless modem, etc. In different systems, the name of the terminal can also be different, for example, in a 5G system, the terminal can be called a user terminal or a user equipment (UE). The wireless terminal device can communicate with one or more core networks (CN) through a radio access network (RAN), and the wireless terminal device can be a mobile terminal device, such as a mobile phone (also known as a "cellular" phone) and a computer with a mobile terminal device, for example, a portable, pocket, handheld, computer built-in or vehicle-mounted mobile device, which exchanges language and / or data with the radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiated protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), etc. The wireless terminal device can also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, which is not limited in the embodiments of the present application.

[0239] The network device and the terminal can each use one or more antennas for multi-input multi-output (MIMO) transmission, and the MIMO transmission can be single user MIMO (SU-MIMO) or multiple user MIMO (MU-MIMO). According to the shape and number of root antenna combinations, the MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, or can be diversity transmission or precoding transmission or beamforming transmission, etc.

[0240] Those skilled in the art will appreciate that embodiments of the present application can be readily used as software, hardware, or a combination of software and hardware. In one

[0241] The present application is described in reference to the flow diagrams and / or block diagrams of the methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flow diagrams and / or block diagrams, and combinations of blocks in the flow diagrams and / or block diagrams, can be implemented by computer executable instructions. Figure 1 one or more functions specified in the flow diagram and / or block diagram block or blocks. Figure 1 an apparatus to perform the functions specified in the flow diagram and / or block diagram block or blocks.

[0242] These processor-executable instructions can also be loaded onto a computer or other programmable data processing devices, so that a series of operations are performed on the computer or other programmable data devices to produce a computer-implemented process such that the instructions executed on the computer or other programmable devices provide steps for implementing the flow diagram and / or block diagram block or blocks. Figure 1 one or more functions specified in the flow diagram and / or block diagram block or blocks. Figure 1 an apparatus to perform the functions specified in the flow diagram and / or block diagram block or blocks.

[0243] These processor-executable instructions can also be loaded onto a computer or other programmable data processing devices, so that a series of operations are performed on the computer or other programmable data devices to produce a computer-implemented process such that the instructions executed on the computer or other programmable devices provide steps for implementing the flow diagram and / or block diagram block or blocks. Figure 1 one or more functions specified in the flow diagram and / or block diagram block or blocks. Figure 1 an apparatus to perform the functions specified in the flow diagram and / or block diagram block or blocks.

[0244] Obviously, various modifications and changes can be made to the present application by those skilled in the art without departing from the spirit and scope of the present application. Accordingly, it is intended that the present application embrace all such modifications and changes that fall within the scope of the appended claims and their equivalents.

Claims

1. A method of downlink time difference of arrival, DL-TDOA, positioning, characterized by, Applied to a terminal, comprising: Receiving a first message sent by a positioning server, the first message comprising indication information; Based on the indication information, determining to use multiple time error groups for reference signal time difference RSTD measurement on a first downlink positioning reference signal DL PRS; The method further comprises: Sending a first response message, the first response message comprising measurement information of a specific time error group; Wherein, the measurement information of the specific time error group comprises: reference timestamp, DL PRS resource set ID, DL PRS time-frequency domain resource, RSTD measurement value, and first time error group ID; The reference timestamp is the measurement time when the specific time error group performs RSTD measurement on the first DL PRS.

2. The method of DL-TDOA positioning of claim 1, wherein, The first DL PRS is determined based on the measurement configuration information included in the first message, or randomly selected by the terminal.

3. The method of DL-TDOA positioning of claim 2, wherein, The method further comprises: In the case that the first message comprises measurement configuration information and the indication information indicates that the terminal uses multiple time error groups to perform RSTD measurement on the first DL PRS, determining the first DL PRS based on the DL PRS resource set identification ID and the DL PRS time-frequency domain resource included in the measurement configuration information.

4. The method of DL-TDOA positioning of claim 1, wherein, The first response message further comprises measurement information of a first time error group; Wherein, the measurement information of the first time error group comprises: DL PRS resource set ID, DL PRS time-frequency domain resource, RSTD measurement value, and second time error group ID; The first time error group is any one of the other time error groups in the multiple time error groups except the specific time error group.

5. The method of DL-TDOA positioning of claim 1, wherein, The first message further comprises a required response time, if the RSTD measurement on the first DL PRS is completed within the required response time, a first response message is sent; If the RSTD measurement on the first DL PRS is not completed within the required response time, a second response message is sent, which carries the reason for measurement failure.

6. A method of downlink time difference of arrival, DL-TDOA, positioning, characterized by, Applied to a positioning server, comprising: Sending a first message to a terminal, the first message comprising indication information, the indication information being used to indicate that the terminal uses multiple time error groups to perform reference signal time difference RSTD measurement on a first downlink positioning reference signal DL PRS; The method further comprises: In the case that the indication information indicates that the terminal uses multiple time error groups to perform reference signal time difference RSTD measurement on the first downlink positioning reference signal DL PRS, receiving a first response message sent by the terminal, the first response message comprising measurement information of a specific time error group and measurement information of a first time error group; Wherein, the measurement information of the specific time error group comprises: reference timestamp, DL PRS resource set ID, DL PRS time-frequency domain resource, RSTD measurement value, and first time error group ID; The reference timestamp is the measurement time when the specific time error group performs RSTD measurement on the first DL PRS.

7. The method of DL-TDOA positioning according to claim 6, characterized in that, The first message further includes measurement configuration information, the measurement configuration information including a DL PRS resource set ID and a DL PRS time-frequency domain resource; and the measurement configuration information is used to determine the first DL PRS.

8. The method of DL-TDOA positioning of claim 6, wherein, The method further includes: determining, based on a first time error group ID in the measurement information of the specific time error group and a second time error group ID in the measurement information of the first time error group and a correspondence between a time error group ID and a receiving channel, that the RSTD measurement value of the first DL PRS belongs to the same time error group; The first time error group is any one of the other time error groups in the plurality of time error groups except for the specific time error group.

9. The method of DL-TDOA positioning of claim 6, wherein, The first message further includes a required response time, which is used to indicate that, when the terminal completes the RSTD measurement of the first DL PRS within the required response time, the terminal sends a first response message; Or, when the terminal does not complete the RSTD measurement of the first DL PRS within the required response time, the terminal sends a second response message, and the second response message carries a reason for measurement failure. 10.An electronic device, comprising a memory, a transceiver, and a processor; The memory is used to store a computer program; the transceiver is used to transceive data under the control of the processor; and the processor is used to execute the computer program in the memory and implement the following steps: receiving a first message sent by a positioning server, the first message including indication information; determining, based on the indication information, that a plurality of time error groups are used for reference signal time difference (RSTD) measurement of a first downlink positioning reference signal (DL PRS); The steps further include: sending a first response message, the first response message including measurement information of a specific time error group; The measurement information of the specific time error group includes a reference timestamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a first time error group ID. The reference timestamp is a measurement time when the specific time error group performs RSTD measurement on the first DL PRS.

11. The electronic device of claim 10, wherein, The first DL PRS is determined based on measurement configuration information included in the first message or is randomly selected by the terminal.

12. The electronic device of claim 11, wherein, The steps further include: In a case where the first message includes measurement configuration information and the indication information indicates that the terminal uses a plurality of time error groups to perform RSTD measurement on the first DL PRS, determining the first DL PRS based on a DL PRS resource set ID and a DL PRS time-frequency domain resource included in the measurement configuration information.

13. The electronic device of claim 10, wherein, The first response message further includes measurement information of a first time error group; The measurement information of the first time error group includes a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a second time error group ID. The first time error group is any one of the other time error groups in the plurality of time error groups except for the specific time error group.

14. The electronic device of claim 10, wherein, The first message further comprises a required response time, and a first response message is sent if the RSTD measurement of the first DL PRS is completed within the required response time; A second response message is sent if the RSTD measurement of the first DL PRS is not completed within the required response time, and the second response message carries the reason for the measurement failure. 15.An electronic device comprising a memory, a transceiver, and a processor; The memory is configured to store a computer program, the transceiver is configured to transceive data under the control of the processor, and the processor is configured to execute the computer program in the memory and implement the following steps: sending a first message to a terminal, wherein the first message comprises indication information indicating that the terminal performs reference signal time difference (RSTD) measurement on a first downlink positioning reference signal (DL PRS) by using multiple time error groups; The steps further comprise: receiving a first response message sent by the terminal in a case where the indication information indicates that the terminal performs RSTD measurement on the first DL PRS by using multiple time error groups, wherein the first response message comprises measurement information of a specific time error group and measurement information of a first time error group; The measurement information of the specific time error group comprises a reference timestamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a first time error group ID. The reference timestamp is a measurement time when the specific time error group performs RSTD measurement on the first DL PRS.

16. The electronic device of claim 15, wherein, The first message further comprises measurement configuration information, wherein the measurement configuration information comprises a DL PRS resource set ID and a DL PRS time-frequency domain resource, and the measurement configuration information is used to determine the first DL PRS.

17. The electronic device of claim 15, wherein, The steps further comprise: determining that the RSTD measurement value of the first DL PRS belongs to the same time error group based on the first time error group ID in the measurement information of the specific time error group, the second time error group ID in the measurement information of the first time error group, and a correspondence between a time error group ID and a receiving channel. The first time error group is any one of the other time error groups in the multiple time error groups except the specific time error group.

18. The electronic device of claim 15, wherein, The first message further comprises a required response time, and a first response message is sent if the RSTD measurement of the first DL PRS is completed within the required response time; Or, a second response message is sent if the RSTD measurement of the first DL PRS is not completed within the required response time, and the second response message carries the reason for the measurement failure.

19. An apparatus for downlink time difference of arrival (DL-TDOA) positioning, the apparatus comprising: Applied to a terminal, comprising: A first receiving module is configured to receive a first message sent by a positioning server, wherein the first message comprises indication information. The first determining module is configured to determine, based on the indication information, that a plurality of time error groups are used for reference signal time difference (RSTD) measurement on a first downlink positioning reference signal (DL PRS); The apparatus further includes: The first sending module is configured to send a first response message, where the first response message includes measurement information of a specific time error group. The measurement information of the specific time error group includes a reference timestamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a first time error group ID. The reference timestamp is a measurement time at which the specific time error group performs RSTD measurement on the first DL PRS.

20. An apparatus for downlink time difference of arrival (DL-TDOA) positioning, the apparatus comprising: The apparatus is applied to a positioning server and includes: The second sending module is configured to send a first message to a terminal, where the first message includes indication information, and the indication information is used to instruct the terminal to use a plurality of time error groups for reference signal time difference (RSTD) measurement on a first downlink positioning reference signal (DL PRS). The apparatus further includes: The second receiving module is configured to receive a first response message sent by the terminal in a case where the indication information instructs the terminal to use a plurality of time error groups for RSTD measurement on the first DL PRS, where the first response message includes measurement information of a specific time error group and measurement information of a first time error group. The measurement information of the specific time error group includes a reference timestamp, a DL PRS resource set ID, a DL PRS time-frequency domain resource, an RSTD measurement value, and a first time error group ID. The reference timestamp is a measurement time at which the specific time error group performs RSTD measurement on the first DL PRS.

21. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is used to make a computer execute the method of the downlink time difference of arrival (DL-TDOA) positioning according to any one of claims 1 to 9.

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