Communication method and communication device

Abstract

Provided are a communication method and a communication device, the method being applicable to the field of communications, the method comprising: acquiring an association relationship between a first positioning reference signal (PRS) resource set and a second PRS resource set, the first PRS resource set and the second PRS resource set being located on different positioning frequency layers (PFL); and receiving a first PRS and a second PRS according to the association relationship and a first hypothesis, the first PRS belonging to a first PRS resource set, the second PRS belonging to a second PRS resource set, the first hypothesis being that the first PRS and the second PRS have the same precoding, or the first hypothesis being that the precoding corresponding to the first PRS and the second PRS is determined based on the same time delay parameter. According to the method, even if transparent precoding exists, measurement of the terminal equipment on the aggregated PRS sent by the network equipment is not affected, so that the accuracy of positioning the terminal equipment by the positioning server is improved.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a communication method and a communication device. Background Art

[0002] In the 3rd Generation Partnership Project (3GPP) standard version (Rlease 17, R17), multiple positioning technologies are supported, including downlink-time difference of arrival (DL-TDOA), downlink-angle of departure (DL-AOD), uplink-time difference of arrival (UL-TDOA), uplink-angle of arrival (UL-AOA), and multi-round trip time (multi-RTT). Among them, DL-TDOA, UL-TDOA, and multi-RTT algorithms are positioning technologies based on arrival time, that is, the receiving end is required to measure the arrival time of the signal sent by the sending end, and then convert it into the distance information between the two, and finally obtain the position of the target to be located. DL-AOD and UL-AOA are positioning technologies based on angles, that is, the receiving end measures the arrival angle of the reference signal sent by the sending end, and then infers the position of the receiving end based on the angle information between the receiving end and multiple senders with known positions.

[0003] When the above technologies are applied for positioning, the positioning accuracy can be improved through the aggregate positioning technology. For example, the network device can send an aggregated positioning reference signal (PRS) through a continuously aggregated positioning frequency layer (PFL) within the frequency band. Since the aggregated positioning reference signal has a larger bandwidth, the terminal device can obtain a more accurate measurement result when measuring the aggregated positioning reference signal.

[0004] However, in actual applications, the above-mentioned aggregate positioning technology may be affected by the protocol transparent precoding, thereby affecting the positioning accuracy. Among them, the above-mentioned protocol transparent precoding can be understood as the precoding corresponding to the PRS sent by the network device side, and the terminal device side does not know its content. Summary of the invention

[0005] The present application provides a communication method and a communication device, so that even if transparent precoding exists, it will not affect the measurement of the aggregated PRS sent by the network device by the terminal device, thereby improving the accuracy of the positioning of the terminal device by the positioning server.

[0006] In a first aspect, a communication method is provided, the method comprising: obtaining an association relationship between a first positioning reference signal PRS resource set and a second PRS resource set, the first PRS resource set and the second PRS resource set being located on different positioning frequency layers PFL; receiving a first PRS and a second PRS according to the association relationship and a first assumption, the first PRS belonging to the first PRS resource set, the second PRS belonging to the second PRS resource set, the first assumption being that the first PRS and the second PRS have the same precoding, or the first assumption being that the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter.

[0007] Optionally, the association relationship between the first PRS resource set and the second PRS resource set may be understood as an aggregation relationship.

[0008] Optionally, the execution subject of the above method may be a terminal device.

[0009] In an embodiment of the present application, by setting the precoding of the first PRS and the second PRS to be the same or setting the delay parameters corresponding to the precoding to be the same, even if transparent precoding exists, it will not affect the terminal device's measurement of the aggregated PRS sent by the network device, thereby improving the accuracy of the positioning server in positioning the terminal device.

[0010] In combination with the first aspect, in some implementations of the first aspect, the first PRS and the second PRS have the same precoding, including: the first PRS and the second PRS have the same spatial domain precoding or the same frequency domain precoding.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter, including: the phase and frequency of the elements in the frequency domain precoding corresponding to the first PRS are in a first linear relationship, the phase and frequency of the elements in the frequency domain precoding corresponding to the second PRS are in a second linear relationship, and the first linear relationship and the second linear relationship are the same.

[0012] In combination with the first aspect, in some implementations of the first aspect, the first linear relationship and the second linear relationship are the same, including: the slopes of the first linear relationship and the second linear relationship are the same.

[0013] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: determining a first measurement result based on the first PRS and the second PRS, the first measurement result being used to indicate at least one of the following information corresponding to a reference signal transmitted between the terminal device and the network device: distance information, angle information, power information, speed information, and Doppler information; and sending the first measurement result to a positioning server.

[0014] Optionally, the reference signal transmitted between the terminal device and the network device may be the first PRS and the second PRS before aggregation, or may be the reference signal after the first PRS and the second PRS are aggregated.

[0015] Optionally, the information corresponding to the above-mentioned reference signal may specifically be at least one of the following: relative time of arrival (RTOA), time of arrival (TOA), angle of arrival (AOA), reference signal received power (RSRP), reference signal received path power (RSRPP), path arrival time (relative ofpath arrival), path arrival angle (angle of path arrival), reference signal Doppler component (referencesignal doppler component), reference signal path Doppler component (reference signal path dopplercomponent), and terminal equipment speed (UE velocity).

[0016] In an embodiment of the present application, the terminal device can measure the first PRS and the second PRS sent by the network device to obtain a first measurement result, and send the first measurement result to the positioning server for positioning. Since the first PRS and the second PRS have the same precoding or the precoding is determined based on the same delay parameter, the accuracy of the first measurement result can be improved, thereby making the positioning result performed by the positioning server more accurate.

[0017] In combination with the first aspect, in some implementations of the first aspect, determining the first measurement result based on the first PRS and the second PRS includes: aggregating the first PRS and the second PRS to obtain a third PRS, the bandwidth of the third PRS being greater than the bandwidth of the first PRS and the second PRS; and determining the first measurement result based on the third PRS.

[0018] In the embodiment of the present application, the terminal device may aggregate the first PRS and the second PRS to obtain a third PRS with a larger bandwidth, and measure the third PRS to obtain a first measurement result. In this way, since the third PRS has a larger bandwidth than the first PRS and the second PRS, the accuracy of the first measurement result can be higher, so that the positioning result of the positioning server is more accurate.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the first measurement result includes: at least one of the following contents corresponding to the third PRS: arrival time difference TDOA, departure angle AOD, power information, speed information and Doppler information.

[0020] In a second aspect, a communication method is provided, the method comprising: obtaining an association relationship between a first PRS resource set and a second PRS resource set, the first PRS resource set and the second PRS resource set being located on different positioning frequency layers PFL; sending a first PRS and a second PRS according to the association relationship and a first assumption, the first PRS belonging to the first PRS resource set, the second PRS belonging to the second PRS resource set, the first assumption being that the first PRS and the second PRS have the same precoding, or the first assumption being that the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter.

[0021] Optionally, the association relationship between the first PRS resource set and the second PRS resource set may be understood as an aggregation relationship.

[0022] Optionally, the execution subject of the above method may be a network device.

[0023] In an embodiment of the present application, by setting the precoding of the first PRS and the second PRS to be the same or setting the delay parameters corresponding to the precoding to be the same, even if transparent precoding exists, it will not affect the terminal device's measurement of the PRS sent by the network device, thereby improving the accuracy of the positioning server in positioning the terminal device.

[0024] In combination with the second aspect, in some implementations of the second aspect, the first PRS and the second PRS have the same precoding, including: the first PRS and the second PRS have the same spatial domain precoding or the same frequency domain precoding.

[0025] In combination with the second aspect, in certain implementations of the second aspect, the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter, including: the phase and frequency of the elements in the frequency domain precoding corresponding to the first PRS are in a first linear relationship, the phase and frequency of the elements in the frequency domain precoding corresponding to the second PRS are in a second linear relationship, and the first linear relationship and the second linear relationship are the same.

[0026] In combination with the second aspect, in some implementations of the second aspect, the first linear relationship and the second linear relationship are the same, including: the slopes of the first linear relationship and the second linear relationship are the same.

[0027] According to a third aspect, a communication device is provided, comprising: an acquisition unit and a processing unit; the acquisition unit is used to acquire an association relationship between a first PRS resource set and a second PRS resource set, wherein the first PRS resource set and the second PRS resource set are located on different PFLs; the processing unit is used to receive a first PRS and a second PRS according to the association relationship and a first assumption, wherein the first PRS belongs to the first PRS resource set and the second PRS belongs to the second PRS resource set, and the first assumption is that the first PRS and the second PRS have the same precoding, or the first assumption is that the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter.

[0028] In combination with the third aspect, in certain implementations of the third aspect, the first PRS and the second PRS have the same precoding, including: the first PRS and the second PRS have the same spatial domain precoding or the same frequency domain precoding.

[0029] In combination with the third aspect, in certain implementations of the third aspect, the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter, including: the phase and frequency of the elements in the frequency domain precoding corresponding to the first PRS are in a first linear relationship, the phase and frequency of the elements in the frequency domain precoding corresponding to the second PRS are in a second linear relationship, and the first linear relationship and the second linear relationship are the same.

[0030] In combination with the third aspect, in certain implementations of the third aspect, the first linear relationship and the second linear relationship are the same, including: the slopes of the first linear relationship and the second linear relationship are the same.

[0031] In combination with the third aspect, in certain implementations of the third aspect, the device also includes: a transceiver unit; the processing unit is used to determine a first measurement result based on the first PRS and the second PRS, and the first measurement result is used to indicate at least one of the following information corresponding to the reference signal transmitted between the terminal device and the network device: distance information, angle information, power information, speed information and Doppler information; the transceiver unit is used to send the first measurement result to the positioning server.

[0032] In combination with the third aspect, in certain implementations of the third aspect, the processing unit is specifically used to: aggregate the first PRS and the second PRS to obtain a third PRS, wherein the bandwidth of the third PRS is greater than the bandwidth of the first PRS and the second PRS; and determine the first measurement result based on the third PRS.

[0033] In combination with the third aspect, in certain implementations of the third aspect, the first measurement result includes: at least one of the following contents corresponding to the third PRS: arrival time difference TDOA, departure angle AOD, power information, speed information and Doppler information.

[0034] In a fourth aspect, a communication device is provided, comprising: an acquisition unit and a processing unit; the acquisition unit is used to acquire an association relationship between a first PRS resource set and a second PRS resource set, the first PRS resource set and the second PRS resource set being located on different positioning frequency layers PFL; the processing unit is used to send a first PRS and a second PRS according to the association relationship and a first assumption, the first PRS belongs to the first PRS resource set, the second PRS belongs to the second PRS resource set, the first assumption is that the first PRS and the second PRS have the same precoding, or the first assumption is that the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter.

[0035] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first PRS and the second PRS have the same precoding, including: the first PRS and the second PRS have the same spatial domain precoding or the same frequency domain precoding.

[0036] In combination with the fourth aspect, in certain implementations of the fourth aspect, the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter, including: the phase and frequency of the elements in the frequency domain precoding corresponding to the first PRS are in a first linear relationship, the phase and frequency of the elements in the frequency domain precoding corresponding to the second PRS are in a second linear relationship, and the first linear relationship and the second linear relationship are the same.

[0037] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first linear relationship and the second linear relationship are the same, including: the slopes of the first linear relationship and the second linear relationship are the same.

[0038] In a fifth aspect, a communication device is provided, comprising: at least one processor and a memory, wherein the at least one processor is coupled to the memory and is used to read and execute instructions in the memory, so that the device implements the method in any one of the implementation modes of the first aspect or the second aspect mentioned above.

[0039] In a sixth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a program code, and when the computer program code runs on a computer, the computer executes a method in any one of the implementations of the first aspect or the second aspect.

[0040] In a seventh aspect, a chip is provided, the chip comprising a circuit, the circuit being used to execute the method in any one of the implementations of the first aspect or the second aspect.

[0041] In an eighth aspect, a computer program product is provided, which includes a computer program. When the computer program is executed, the computer executes the method in any one of the implementation modes of the first aspect or the second aspect.

[0042] In a ninth aspect, a terminal device is provided, comprising: an apparatus in any one of the implementation methods in the third aspect above.

[0043] In a tenth aspect, a network device is provided, comprising: an apparatus in any one of the implementation methods in the fourth aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of an uplink-based positioning process provided in an embodiment of the present application;

[0045] Figure 2 is a schematic diagram based on three-side positioning provided in an embodiment of the present application;

[0046] Figure 3 It is a schematic diagram of CC distribution within and between frequency bands provided in an embodiment of the present application;

[0047] Figure 4 is a schematic flow chart of aggregation processing of positioning reference signals on different PFLs provided in an embodiment of the present application;

[0048] Figure 5 This is a schematic diagram of the effect of phase continuity between PFLs on ToA estimation provided by an embodiment of the present application;

[0049] Figure 6 This is a schematic diagram of an aggregation estimation error caused by different precoding provided in an embodiment of the present application;

[0050] Figure 7 It is a system architecture diagram applicable to a communication method provided in an embodiment of the present application;

[0051] Figure 8 is a schematic flow chart of a communication method provided in an embodiment of the present application;

[0052] Fig. 9 is a schematic flow chart of another communication method provided in an embodiment of the present application;

[0053] Fig.10 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0054] Fig.11 This is a schematic diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0056] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, future fifth generation (5G) system or new radio (NR), etc.

[0057] The terminal equipment (UE) in the embodiments of the present application may refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal equipment may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile communication network (PLMN), etc., and the embodiments of the present application are not limited to this.

[0058] The network device in the embodiment of the present application can be a device for communicating with a terminal device. The network device can be a base station (base transceiver station, BTS) in a global system of mobile communication (GSM) system or code division multiple access (CDMA), or a base station (NodeB, NB) in a wideband code division multiple access (WCDMA) system, or an evolutionary base station (eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network, etc., and the embodiments of the present application are not limited.

[0059] The application scenarios of the embodiments of the present application include: downlink carrier aggregation positioning scenario, that is, aggregated PRS positioning scenario, including downlink arrival time difference positioning, downlink arrival angle positioning, and the main process includes: generation of positioning request, transmission of resource configuration information, signal transmission and measurement, and transmission of measurement information.

[0060] In order to facilitate understanding of the embodiments of the present application, first, a brief introduction is given to the concepts and technologies involved in the embodiments of the application.

[0061] 1. PRS

[0062] The main purpose of PRS is to support high-precision device positioning services, including indoor and outdoor positioning. Terminal devices can determine their own location coordinates by receiving and processing PRS from different positioning reference signal sources.

[0063] 2. PRS Resources

[0064] Time-frequency resources used to send PRS signals.

[0065] 3. PRS Resource Set

[0066] A set of one or more PRS resources has some common parameters: for example, subcarrier spacing, the same starting physical resource block (PRB) and bandwidth, and PRS comb size.

[0067] 4. Uu port

[0068] The cellular network communication interface mainly refers to the communication interface between the UE and the base station, including uplink and downlink, and is characterized by achieving reliable communication over long distances and a larger range.

[0069] 5. Component Carrier (CC)

[0070] Refers to the carriers corresponding to different cells participating in carrier aggregation.

[0071] 6. Carrier aggregation

[0072] In order to provide a higher wireless channel bandwidth, multiple consecutive or non-consecutive carriers are aggregated into a larger bandwidth to meet higher data rate or measurement requirements.

[0073] 7. Cramero's Lower Bound

[0074] It is used to measure the theoretical accuracy bound of parameter estimation, that is, the theoretical minimum value of the ToA estimation error. The error of actual ToA measurement estimation can only approach this lower bound infinitely, but will not be less than this lower bound.

[0075] 8. PFL

[0076] PFL can be understood as a set of positioning reference signal (PRS) resource sets on a frequency band. A PRS resource set is a set containing a certain number of PRS resources.

[0077] 9. Cyclic delay diversity (CDD)

[0078] It is a simple method to obtain diversity gain by transmitting copies of the transmitted signal with different delays on different antennas, thereby obtaining diversity gain at the receiving end.

[0079] The following introduces the technical problems to be solved by this application and the technical solutions adopted.

[0080] The R17 standard version of 3GPP supports multiple positioning technologies such as DL-TDOA, DL-AOD, UL-TDOA, UL-AOA, and multi-RTT. Among them, DL-TDOA, UL-TDOA, and multi-RTT algorithms are positioning technologies based on arrival time, that is, the receiving end is required to measure the arrival time of the signal sent by the sending end, and then convert it into the distance information between the two, and finally obtain the position of the target to be located. DL-AOD and UL-AOA are positioning technologies based on angles, that is, the receiving end measures the arrival angle of the reference signal sent by the sending end, and then infers the position of the receiving end based on the angle information between the receiving end and multiple senders with known positions.

[0081] The following briefly introduces the positioning process using DL-TDOA technology as an example:

[0082] For the downlink-based solution, it is necessary to measure the PRS on the terminal device side. For example, the terminal device measures the arrival time of the PRS sent by the base station. The measurement process generally goes through the following steps: first, the positioning server (location management function, LMF) sends PRS resource information to the base station through auxiliary data, such as PRS time-frequency resources, period, etc., and sends the information to the terminal device; then the LMF sends a measurement request to the terminal device. After receiving the measurement request from the LMF, the terminal device starts to receive the PRS sent by the base station and measures the arrival time of the PRS; the terminal device reports the measurement results to the positioning server (LMF), and finally the positioning server uses the received measurement information to estimate the position. The specific process of the above process can be as follows: Figure 1 shown.

[0083] Combine the following Figure 2 The method of LMF to calculate the position of the target to be located based on DL-TDOA technology is specifically introduced.

[0084] like Figure 2 As shown, assuming that the locations of the three base stations are known, the coordinates of the ith base station are defined as (x i ,y i ), the coordinates of the target to be located are (x UE ,y UE), and take the first base station as the reference base station, assuming that the arrival time of the PRS measured by the other two base stations is t i , then the arrival time difference between any base station and the reference base station is Δt i1 According to the definition of a hyperbola (the distance from two fixed points is a constant), the target is located on the hyperbola with two base stations as foci, and the following set of equations can be listed:

[0085]

[0086]

[0087] In the above two equations, c is the speed of light, because there are only two unknowns (x UE ,y UE ), the position coordinates of the target terminal device can be obtained by combining equations (1) and (2). In fact, due to the existence of measurement errors, the above equations generally have no closed-form solutions. Therefore, optimization algorithms such as the least squares algorithm or the particle swarm filter algorithm can be used to estimate the optimal solution of the above equations.

[0088] From the above introduction, we can know that to achieve positioning, a basic condition is that the base station needs to send a positioning reference signal (for example, PRS), and then the terminal device measures it to obtain the distance information or angle information between the terminal device and the base station at the same time or time period, and then calculate the position of the terminal device. For the above-mentioned three-sided positioning or triangulated positioning (including: DL-TDOA, UL-TDOA, DL-AOD, UL-AOA), it is necessary to obtain the distance or angle information between multiple terminal devices and the base station at the same time, so multi-cell or multi-site measurements are required. Due to frequency reuse between networks, in order to suppress interference between cells, the signal of a single cell can generally only cover a single cell. In order to ensure the measurement quality of neighboring cells during positioning measurements, the above-mentioned positioning reference signal is introduced so that it can cover multiple cells, thereby obtaining the measurement quantity of multiple cells or multiple sites to complete three-sided or triangulated positioning.

[0089] Among them, for downlink three-side positioning, the terminal device can measure the air propagation time of the signal to the base station, that is, the arrival time (ToA), based on the received positioning reference signal, and then obtain the TDoA of different sites to complete the three-side positioning. Obviously, the positioning accuracy is positively correlated with the measurement accuracy of ToA. Combining the estimation theory with the characteristics of the orthogonal frequency division multiplexing (OFDM) transmission system, it can be concluded that the Cramer-Rao lower bound of the mean square error of ToA estimation is:

[0090]

[0091] Among them, SNR is the signal-to-noise ratio of the received positioning reference signal, c is the speed of light, and B is the bandwidth occupied by the positioning reference signal in the frequency domain. From the above formula, it can be seen that the ToA estimation error is inversely correlated with the bandwidth of the positioning reference signal. The larger the bandwidth, the smaller the lower bound of the error and the higher the ToA estimation accuracy.

[0092] One way to improve the accuracy of ToA estimation is to increase the bandwidth corresponding to the positioning reference signal. According to certain rules, 3GPP divides the entire wireless spectrum from low to high into frequency bands corresponding to a certain range of spectrum. The maximum bandwidth of a single carrier is 100MHz. In order to obtain a larger bandwidth to send positioning reference signals and thus improve the accuracy of ToA estimation, the current 3GPP R18 standard supports the transmission of positioning reference signals with continuous carrier aggregation within the frequency band, such as Figure 3 As shown, for two-carrier aggregation, only CC1 and CC2 aggregation is supported, and CC1 and CC3 aggregation is not supported, because CC1 and CC3 are discontinuous CCs in the band; similarly, aggregation of CC of band #n and CC of band #n+1 is not supported, because they belong to CCs of different bands.

[0093] It should be understood that the aggregation of CC1 and CC2 in the downlink corresponds to the aggregation of PLF1 and PLF2. In the embodiment of the present application, the aggregation of CCs and the aggregation of PFLs can be used interchangeably.

[0094] like Figure 4 As shown in the figure, taking the downlink aggregation of PLF1 and PLF2 as an example, the processing method of PRS aggregation on different PFLs is introduced:

[0095] S401, LMF sets the configuration of PRS and sends the configuration information of PRS to the terminal device and the base station.

[0096] Among them, the configuration information of PRS may include: PRS resource set aggregation association relationship and PRS resource information, etc. For example, the configuration information of PRS may indicate that the first PRS resource set is associated with the second PRS resource set, that is, the resources in the first PRS resource set and the second PRS resource set can be aggregated and sent.

[0097] S402, LMF sends a measurement request to the terminal device to request the terminal device to perform aggregate positioning measurement on the same symbol

[0098] S403: After receiving the configuration information, the base station may send a PRS signal.

[0099] S404, the terminal device receives the PRS of PFL1 and PFL2 on the same symbol, and splices them into a PRS with a large bandwidth for measurement, thereby obtaining a ToA measurement value under a higher bandwidth, making the ToA estimation more accurate.

[0100] S405: The terminal device converts ToA into TDoA and reports it to LMF.

[0101] S406, LMF performs positioning solution according to the reported value.

[0102] In order to ensure the accuracy of the splicing measurement of the two PFL channels in step S404, it is required that the two PFLs should have phase continuity. Figure 5 As shown in the figure, the phase-frequency characteristic curve of the PFL channel is given, and ToA is the slope corresponding to the phase-frequency characteristic curve in the figure below, as shown in Figure 5 As shown in Figure (a), when the phase of the connection point between PFL1 and PFL2 is continuous, the phase-frequency characteristic curves of PFL1 and PFL2 are on the same line segment, and the ToA estimation accuracy is high. When the phase of the connection point between PFL1 and PFL2 is discontinuous, such as Figure 5 As shown in (b), the ToA estimated by PFL1 and PFL2 is shown as a solid line. Its slope is different from the slope corresponding to the true ToA (dashed line). It can be seen that the phase discontinuity between PFLs will lead to a decrease in the accuracy of the aggregated estimated ToA. In order to ensure the accuracy of the splicing measurement of the two PFL channels, the two PFLs should have phase continuity.

[0103] However, the current in-band continuous aggregation positioning technology only considers the need to ensure the phase continuity between PFLs, and does not consider the impact of protocol-transparent precoding on PRS on positioning (protocol transparency may mean that the specific content of the precoding is not interacted through protocol signaling, which can be understood as the precoding corresponding to the PRS sent by the base station side, and the terminal device side does not know its content).

[0104] Assume that the PRS signals on PLF1 and PLF2 are S PRS1 With S PRS2 , the protocol transparent precoding amounts are w1 and w2 respectively, then the PRS signals actually sent are X PRS1 =w1S PRS1 , X PRS2 =w2S PRS2 Assume that the PRS signals on the two PLFs received by the terminal device are Y PRS1 With Y PRS2 , then the corresponding channel estimation results are Obviously, when the PRS precoding is present, the channel observed by the terminal device is a combination of the actual channel and the precoding, so the positioning accuracy is affected by the precoding.

[0105] For example, when When , two cyclic delay precodings with different delays τ1 and τ2 are added to PRS1 and PRS2 respectively. Since τ1 and τ2 are different, the channel changes observed by the terminal device side are different, which leads to a decrease in the accuracy of the aggregate estimation, such as Figure 6 As shown, since the slopes of the phase-frequency curves (as shown by the dotted lines) corresponding to PRS1 and PRS2 are different, the accuracy of the aggregated estimation will decrease during aggregation.

[0106] Therefore, the current intra-band continuous aggregation positioning technology does not consider the precoding relationship between aggregated PRSs, which will lead to deviations between PRS measurements on different PFLs in positioning measurements, thereby introducing additional ToA measurement errors and reducing positioning accuracy.

[0107] The embodiments of the present application provide a communication method and a communication device, which can improve the accuracy of positioning a terminal device in the presence of transparent precoding.

[0108] Figure 7 It is a system architecture diagram applicable to a communication method provided in an embodiment of the present application.

[0109] like Figure 7As shown in the architecture diagram, the terminal device is connected to the radio access network through the LTE-Uu and / or NR-Uu interfaces respectively via the ng-eNB and gNB; the radio access network is connected to the core network through the NG-C interface via the access and mobility management function (AMF) unit. Among them, the next-generation radio access network (NG-RAN) includes one or more ng-eNBs; NG-RAN may also include one or more gNBs; NG-RAN may also include one or more ng-eNBs and gNBs. The ng-eNB and gNB communicate through the Xn interface. The ng-eNB is an LTE access network device accessing the 5G core network, and the gNB is a 5G access network device accessing the 5G core network. The core network includes units such as AMF and LMF (or evolved serving mobile location center (E-SMLC)). Among them, AMF is used to implement functions such as access management, and LMF (or E-SMLC) is used to implement functions such as positioning. AMF and LMF are connected through the NL1 interface. LMF is a device or component deployed in the core network to provide positioning functions for terminal devices.

[0110] Figure 8 It is a schematic flowchart of a communication method provided in an embodiment of the present application. Method 800 may include steps S801 to S805.

[0111] S801, the terminal device and the network device obtain an association relationship between a first PRS resource set and a second PRS resource set.

[0112] The first PRS resource set and the second PRS resource set may be located on different PFLs.

[0113] Optionally, the association relationship between the first PRS resource set and the second PRS resource set may be understood as an aggregation relationship.

[0114] Optionally, the terminal device and the network device may obtain an association relationship between the first PRS resource set and the second PRS resource set from a positioning server.

[0115] S802: The network device sends a first PRS and a second PRS according to the association relationship and the first assumption.

[0116] The first assumption is that the first PRS and the second PRS have the same precoding, or the first assumption is that the precoding corresponding to the first PRS and the second PRS are determined based on the same delay parameter.

[0117] In one embodiment, the first PRS and the second PRS have the same precoding, including: the first PRS and the second PRS have the same spatial domain precoding or the same frequency domain precoding.

[0118] In one embodiment, the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter, including: the phase and frequency of the elements in the frequency domain precoding corresponding to the first PRS form a first linear relationship, and the phase and frequency of the elements in the frequency domain precoding corresponding to the second PRS form a second linear relationship, and the first linear relationship and the second linear relationship are the same.

[0119] Optionally, the first linear relationship and the second linear relationship being the same may be understood as: the slopes of the first linear relationship and the second linear relationship being the same.

[0120] It should be understood that in the embodiments of the present application, the network device and the base station may be the same concept.

[0121] S803: The terminal device determines a first measurement result according to the first PRS and the second PRS.

[0122] Among them, the above-mentioned first measurement result can be used to indicate at least one of the following information corresponding to the reference signal transmitted between the terminal device and the network device: distance information, angle information, power information, speed information and Doppler information.

[0123] Optionally, the first measurement result specifically includes at least one of the following: RTOA, TOA, AOA, RSRP, RSRPP, path arrival time, path arrival angle, reference signal Doppler component, reference signal path Doppler component and terminal device speed.

[0124] Optionally, the reference signal transmitted between the terminal device and the network device may be the first PRS and the second PRS before aggregation, or may be the positioning reference signal after the first PRS and the second PRS are aggregated.

[0125] In one embodiment, step S803 specifically includes: the terminal device aggregates the first PRS and the second PRS to obtain a third PRS, the bandwidth of the third PRS is greater than the bandwidth of the first PRS and the second PRS; and the first measurement result is determined according to the third PRS. In this way, since the third PRS has a larger bandwidth than the first PRS and the second PRS, the accuracy of the first measurement result can be higher, thereby ensuring that the positioning result of the positioning server is more accurate.

[0126] Optionally, in this embodiment, the first measurement result may include at least one of the following contents corresponding to the third PRS: time difference of arrival TDOA, angle of departure AOD, power information, speed information and Doppler information.

[0127] S804: The terminal device sends a first measurement result to the positioning server.

[0128] S805: The positioning server positions the terminal device according to the first measurement result.

[0129] Specifically, the positioning server can Figure 2 The method described in the text part is used to locate the terminal device, which will not be repeated here.

[0130] In an embodiment of the present application, by setting the precoding of the first PRS and the second PRS to be the same or setting the delay parameters corresponding to the precoding to be the same, even if transparent precoding exists, it will not affect the terminal device's measurement of the PRS sent by the network device, thereby improving the accuracy of the positioning server in positioning the terminal device.

[0131] Fig. 9 It is a schematic flow chart of another communication method provided in an embodiment of the present application. Method 900 may be a specific description of each step in method 800.

[0132] S901, LMF sends auxiliary data to the base station and terminal equipment.

[0133] The auxiliary data may include PRS resource information, and the PRS resource information includes: an aggregation association relationship between PRS resource sets, that is, indicating which resources between which PRS sets can be aggregated and sent; and each PRS resource set may include PRS time-frequency resource information.

[0134] S902, LMF sends positioning request information to the terminal device.

[0135] The positioning request information may be used to request the terminal device to perform aggregate positioning measurement.

[0136] S903, the base station sends a PRS signal to the terminal device according to the PRS resource information received in step S903.

[0137] S904: The terminal device receives the PRS according to the first assumption and performs PRS measurement.

[0138] Among them, the above-mentioned first assumption can be: PRS has the same precoding or the precoding is determined based on the same delay parameter; the terminal device measures the PRS and can obtain a measurement result.

[0139] Optionally, the above PRS may be a polymerized PRS.

[0140] Optionally, the PRS having the same precoding or the precoding being determined based on the same delay parameter can be understood as: the PRS includes a first PRS and a second PRS, and the first PRS and the second PRS have the same precoding or the precoding being determined based on the same delay parameter.

[0141] S905, the terminal device reports the measurement result to the LMF.

[0142] S906, LMF locates the terminal device according to the measurement result.

[0143] Among them, LMF can be based on Figure 2 The method described in the text part is used to locate the terminal device, which will not be repeated here.

[0144] In an embodiment of the present application, the terminal device can receive the PRS sent by the base station. Since the precoding in the PRS is the same or the precoding is determined based on the same delay parameter, even if transparent precoding exists, it will not affect the terminal device's measurement of the PRS sent by the base station, thereby improving the accuracy of LMF positioning.

[0145] The specific implementation manner in which the first PRS and the second PRS have the same spatial precoding in method 800 and method 900 is described in detail below.

[0146] Assume that there are M transmitting antennas on the base station side, where M is a positive integer. When the PRS signals on the two PFLs are generated, the role of spatial precoding is to select which antennas send different PRS signals and determine the weights of the coding on the corresponding antennas. Assume that the original PRS signal is S PRS1 With S PRS2 , whose spatial precoding amounts are w1 and w2 respectively, then X PRS1 =w1S PRS1 , X PRS2 =w2S PRS2 . Where w1=[w 11 ,w 12 ,…,w 1M ] T , w2=[w 21 ,w 22 ,…,w 2M ] T , where an element in the precoding vector or matrix is ​​0, it means that the antenna corresponding to the precoding element does not send the PRS signal. If the element is not 0, it means that the antenna sends the corresponding PRS signal, and the element value is the transmission weight. PRS1 It can be understood as the first PRS in method 800. PRS2 It can be understood as the second PRS in method 800.

[0147] In this implementation, the spatial precoding matrix or vector of the aggregated PRS1 and PRS2 can be set to be completely consistent, that is, PRS1 and PRS2 should be sent through the same antenna, and the weight values ​​corresponding to different PRSs are the same. For example, the above parameters are set to: M = 4, It means that both PRS1 and PRS2 are sent through antenna 2 and antenna 4, and when PRS1 and PRS2 are sent, the sending weights on the sending antennas are the same.

[0148] In an embodiment of the present application, by sending the PRS through the same antenna and the corresponding transmission weights of the antenna, it can be ensured that the frequency domain subcarriers in the spliced ​​channel corresponding to the PRS received on the terminal device side have phase continuity and consistency of phase changes, thereby ensuring the measurement accuracy of the aggregate positioning.

[0149] The following describes a specific implementation manner in which precoding of the first PRS and the second PRS in method 800 and method 900 is determined based on the same delay parameter.

[0150] Assume that the frequency domain signals of PRS1 and PRS2 to be aggregated are S PRS1 =[s 11 ,s 12 ,…,s 1N ]T,S PRS2 =[s 11 ,s 22 ,…,s 2N ] T , where the above S PRS1 It can be understood as the first PRS in method 800. PRS2 It can be understood as the second PRS in method 800. Frequency domain precoding can be understood as multiplying a weight on the frequency domain PRS signal. Assume that the frequency domain precoding matrices or vectors corresponding to PRS1 and PRS2 are w1=[w 11 ,w 12 ,…,w 1N ] T , w2=[w 21 ,w 22 ,…,w 2N ] T .

[0151] Then the PRS signals after frequency domain precoding are:

[0152] X PRS1 =[w 11 s 11 ,w 12 s 12 ,…,w 1N s 1N ]T

[0153] X PRS2 =[w 21 s 21 ,w 22 s 22 ,…,w 2N s 2N ] T

[0154] Since ToA corresponds to the slope of the channel phase-frequency curve, frequency domain precoding should not destroy the consistency of the channel frequency domain phase. For example, assuming that the frequency domain precoding method is cyclic delay diversity precoding (i.e., increasing the channel transmission delay through precoding), the corresponding CDD precoding matrix delay parameter on PRS1 is τ1, The corresponding CDD precoding matrix delay parameter on PRS2 is τ2,

[0155] like Figure 6 As described in the corresponding text part, at this time, the slope of the phase-frequency curve corresponding to the channel H1 corresponding to PRS1 is ToA+τ1, and the slope of the phase-frequency curve corresponding to the channel H2 corresponding to PRS2 is ToA+τ2. Therefore, in order to ensure the accuracy of the aggregate estimation, the frequency domain precoding matrix of PRS1 and PRS2 should satisfy τ1=τ2, that is, the delay parameters in the precoding matrix are the same, and the frequency parameters (that is, the corresponding element values ​​in w1 and w2) increase in sequence according to the subcarrier frequency between the two PRSs, that is, w1 and w2 satisfy the following relationship:

[0156]

[0157]

[0158] For zero-delay frequency domain precoding, that is, frequency domain precoding does not introduce additional delay, for example, only a common phase value may be added in the frequency domain, and in this case, w1=w2 should be ensured.

[0159] In an embodiment of the present application, by setting the delay parameters in the precoding matrix to be the same, it can be ensured that the frequency domain subcarriers in the spliced ​​channel corresponding to the aggregated PRS received by the terminal device have phase continuity and consistency of phase changes, thereby ensuring the measurement accuracy of the aggregated positioning.

[0160] It should be understood that in the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between the various embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0161] Fig.10 1 is a schematic diagram of a communication device 1000 provided in an embodiment of the present application. The device 1000 may include an acquisition unit 1010, a transceiver unit 1020, and a processing unit 1030. The acquisition unit 1010 is used to acquire instructions and / or data, and the transceiver unit 1020 is used to send and receive corresponding instructions and / or data. The acquisition unit 1010 and the transceiver unit 1020 may also be referred to as a communication interface or a communication unit. The processing unit 1030 is used to perform data processing so that the device 1000 implements the aforementioned communication method.

[0162] Optionally, the device 1000 may further include a storage unit for implementing a corresponding storage function and storing corresponding instructions and / or data.

[0163] As a design, the apparatus 1000 may be used to execute the actions performed by the terminal device in the above method embodiment.

[0164] The apparatus 1000 includes: an acquisition unit 1010 and a processing unit 1030; the acquisition unit 1010 is used to acquire an association relationship between a first PRS resource set and a second PRS resource set, where the first PRS resource set and the second PRS resource set are located on different PFLs; the processing unit 1030 is used to receive a first PRS and a second PRS according to the association relationship and a first assumption, where the first PRS belongs to the first PRS resource set and the second PRS belongs to the second PRS resource set, and the first assumption is that the first PRS and the second PRS have the same precoding, or the first assumption is that the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter.

[0165] Optionally, the processing unit 1030 is specifically configured to control the transceiver unit 1020 to receive the first PRS and the second PRS according to the association relationship and the first assumption.

[0166] In a possible implementation manner, the first PRS and the second PRS have the same precoding, including: the first PRS and the second PRS have the same spatial domain precoding or the same frequency domain precoding.

[0167] In one possible implementation, the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter, including: the phase and frequency of the elements in the frequency domain precoding corresponding to the first PRS are in a first linear relationship, and the phase and frequency of the elements in the frequency domain precoding corresponding to the second PRS are in a second linear relationship, and the first linear relationship and the second linear relationship are the same.

[0168] In a possible implementation manner, the first linear relationship and the second linear relationship are the same, including: the slopes of the first linear relationship and the second linear relationship are the same.

[0169] In one possible implementation, the device 1000 also includes: a transceiver unit 1020; a processing unit 1030, used to determine a first measurement result based on the first PRS and the second PRS, and the first measurement result is used to indicate at least one of the following information corresponding to the reference signal transmitted between the terminal device and the network device: distance information, angle information, power information, speed information and Doppler information; the transceiver unit 1020 is used to send the first measurement result to the positioning server.

[0170] In a possible implementation, the processing unit 1030 is specifically configured to: aggregate the first PRS and the second PRS to obtain a third PRS, where a bandwidth of the third PRS is greater than a bandwidth of the first PRS and the second PRS; and determine the first measurement result according to the third PRS.

[0171] In a possible implementation manner, the first measurement result includes: at least one of the following contents corresponding to the third PRS: arrival time difference TDOA, departure angle AOD, power information, speed information and Doppler information.

[0172] As a design, the apparatus 1000 may be used to execute the actions performed by the network device or base station in the above method embodiments.

[0173] The apparatus 1000 includes: an acquisition unit 1010 and a processing unit 1030; the acquisition unit 1010 is used to acquire an association relationship between a first PRS resource set and a second PRS resource set, where the first PRS resource set and the second PRS resource set are located on different positioning frequency layers PFL; the processing unit 1030 is used to send a first PRS and a second PRS according to the association relationship and a first assumption, where the first PRS belongs to the first PRS resource set, and the second PRS belongs to the second PRS resource set, and the first assumption is that the first PRS and the second PRS have the same precoding, or the first assumption is that the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter.

[0174] Optionally, the processing unit 1030 is specifically configured to control the transceiver unit 1020 to send the first PRS and the second PRS according to the association relationship and the first assumption.

[0175] In a possible implementation manner, the first PRS and the second PRS have the same precoding, including: the first PRS and the second PRS have the same spatial domain precoding or the same frequency domain precoding.

[0176] In one possible implementation, the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter, including: the phase and frequency of the elements in the frequency domain precoding corresponding to the first PRS are in a first linear relationship, and the phase and frequency of the elements in the frequency domain precoding corresponding to the second PRS are in a second linear relationship, and the first linear relationship and the second linear relationship are the same.

[0177] In a possible implementation manner, the first linear relationship and the second linear relationship are the same, including: the slopes of the first linear relationship and the second linear relationship are the same.

[0178] Fig.11 It is a schematic diagram of another communication device 1100 provided in an embodiment of the present application.

[0179] The device 1100 includes: a memory 1110, a processor 1120, and a communication interface 1130. The memory 1110, the processor 1120, and the communication interface 1130 are connected through an internal connection path, the memory 1110 is used to store instructions, and the processor 1120 is used to execute the instructions stored in the memory 1110 to control the communication interface 1130 to obtain information, or to enable the device 1100 to implement the aforementioned communication method. Optionally, the memory 1110 can be coupled to the processor 1120 through an interface, or can be integrated with the processor 1120.

[0180] It should be noted that the communication interface 1130 uses a transceiver device such as, but not limited to, a transceiver. The communication interface 1130 may also include an input / output interface.

[0181] The processor 1120 stores one or more computer programs, and the one or more computer programs include instructions. When the instructions are executed by the processor 1120, the device 1100 executes the communication method in each of the above embodiments.

[0182] In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 1120 or an instruction in the form of software. The method disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software modules in the processor for execution. The software module can be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 1110, and the processor 1120 reads the information in the memory 1110 and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it will not be described in detail here.

[0183] Optionally, Fig.11The communication interface 1130 in the embodiment can be implemented Fig.10 The acquisition unit 1010 or the transceiver unit 1020, Fig.11 The processor 1120 in the embodiment can implement Fig.10 The processing unit 1030 in.

[0184] The embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a program code, and when the computer program code is executed on a computer, the computer executes the above Figures 1 to 9 Any of the methods in .

[0185] The present application also provides a computer program product, which includes a computer program. When the computer program is executed, the computer executes the above Figures 1 to 9 Any method.

[0186] The present application also provides a chip, including: a circuit, the circuit is used to execute the above Figures 1 to 9 Any of the methods in .

[0187] The present application also provides a terminal device, including Fig.10 or Fig.11 Any communication device.

[0188] The present application also provides a network device, including Fig.10 or Fig.11 Any communication device.

[0189] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0190] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0191] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0192] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0193] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0194] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0195] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: The method comprises: Acquire an association relationship between a first positioning reference signal PRS resource set and a second PRS resource set, where the first PRS resource set and the second PRS resource set are located on different positioning frequency layers PFL; According to the association relationship and the first assumption, a first PRS and a second PRS are received, the first PRS belongs to the first PRS resource set, the second PRS belongs to the second PRS resource set, the first assumption is that the first PRS and the second PRS have the same precoding, or the first assumption is that the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter.

2. The method according to claim 1, characterized in that The first PRS and the second PRS have the same precoding, including: The first PRS and the second PRS have the same spatial domain precoding or the same frequency domain precoding.

3. The method according to claim 1 or 2, characterized in that The precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter, including: The phase and frequency of the elements in the frequency domain precoding corresponding to the first PRS form a first linear relationship, the phase and frequency of the elements in the frequency domain precoding corresponding to the second PRS form a second linear relationship, and the first linear relationship and the second linear relationship are the same.

4. The method according to claim 3, characterized in that The first linear relationship is the same as the second linear relationship, including: The slopes of the first linear relationship and the second linear relationship are the same.

5. The method according to claims 1 to 4, characterized in that The method further comprises: Determine a first measurement result according to the first PRS and the second PRS, where the first measurement result is used to indicate at least one of the following information corresponding to a reference signal transmitted between the terminal device and the network device: distance information, angle information, power information, speed information, and Doppler information; Send the first measurement result to a positioning server.

6. The method according to claim 5, characterized in that The determining a first measurement result according to the first PRS and the second PRS includes: Aggregate the first PRS and the second PRS to obtain a third PRS, where a bandwidth of the third PRS is greater than a bandwidth of the first PRS and the second PRS; The first measurement result is determined according to the third PRS.

7. The method according to claim 6, characterized in that The first measurement result includes: at least one of the following contents corresponding to the third PRS: arrival time difference TDOA, departure angle AOD, power information, speed information and Doppler information.

8. A communication method, characterized in that: The method comprises: Acquire an association relationship between a first PRS resource set and a second PRS resource set, where the first PRS resource set and the second PRS resource set are located on different positioning frequency layers PFL; According to the association relationship and the first assumption, a first PRS and a second PRS are sent, the first PRS belongs to the first PRS resource set, the second PRS belongs to the second PRS resource set, the first assumption is that the first PRS and the second PRS have the same precoding, or the first assumption is that the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter.

9. The method according to claim 8, characterized in that The first PRS and the second PRS have the same precoding, including: The first PRS and the second PRS have the same spatial domain precoding or the same frequency domain precoding.

10. The method according to claim 8 or 9, characterized in that The precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter, including: The phase and frequency of the elements in the frequency domain precoding corresponding to the first PRS form a first linear relationship, the phase and frequency of the elements in the frequency domain precoding corresponding to the second PRS form a second linear relationship, and the first linear relationship and the second linear relationship are the same.

11. The method according to claim 10, characterized in that The first linear relationship is the same as the second linear relationship, including: The slopes of the first linear relationship and the second linear relationship are the same.

12. A communication device, characterized in that: The device comprises: an acquisition unit and a processing unit; The acquiring unit is configured to acquire an association relationship between a first PRS resource set and a second PRS resource set, where the first PRS resource set and the second PRS resource set are located on different PFLs; The processing unit is configured to receive a first PRS and a second PRS according to the association relationship and a first assumption, where the first PRS belongs to the first PRS resource set, and the second PRS belongs to the second PRS resource set, and the first assumption is that the first PRS and the second PRS have the same precoding, or the first assumption is that the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter.

13. The device according to claim 12, characterized in that The first PRS and the second PRS have the same precoding, including: The first PRS and the second PRS have the same spatial domain precoding or the same frequency domain precoding.

14. The device according to claim 12 or 13, characterized in that The precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter, including: The phase and frequency of the elements in the frequency domain precoding corresponding to the first PRS form a first linear relationship, the phase and frequency of the elements in the frequency domain precoding corresponding to the second PRS form a second linear relationship, and the first linear relationship and the second linear relationship are the same.

15. The device according to claim 14, characterized in that The first linear relationship is the same as the second linear relationship, including: The slopes of the first linear relationship and the second linear relationship are the same.

16. The device according to any one of claims 12 to 15, characterized in that The device further comprises: a transceiver unit; The processing unit is further used to determine a first measurement result according to the first PRS and the second PRS, where the first measurement result is used to indicate at least one of the following information corresponding to the reference signal transmitted between the terminal device and the network device: distance information, angle information, power information, speed information, and Doppler information; The transceiver unit is used to send the first measurement result to the positioning server.

17. The device according to claim 16, characterized in that The processing unit is specifically used for: Aggregate the first PRS and the second PRS to obtain a third PRS, where a bandwidth of the third PRS is greater than a bandwidth of the first PRS and the second PRS; The first measurement result is determined according to the third PRS.

18. The device according to claim 17, characterized in that The first measurement result includes: at least one of the following contents corresponding to the third PRS: arrival time difference TDOA, departure angle AOD, power information, speed information and Doppler information.

19. A communication device, characterized in that: The device comprises: an acquisition unit and a processing unit; The acquiring unit is configured to acquire an association relationship between a first PRS resource set and a second PRS resource set, wherein the first PRS resource set and the second PRS resource set are located on different positioning frequency layers PFL; The processing unit is configured to send a first PRS and a second PRS according to the association relationship and a first assumption, where the first PRS belongs to the first PRS resource set, and the second PRS belongs to the second PRS resource set, and the first assumption is that the first PRS and the second PRS have the same precoding, or the first assumption is that the precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter.

20. The device according to claim 19, characterized in that The first PRS and the second PRS have the same precoding, including: The first PRS and the second PRS have the same spatial domain precoding or the same frequency domain precoding.

21. The device according to claim 19 or 20, characterized in that The precoding corresponding to the first PRS and the second PRS is determined based on the same delay parameter, including: The phase and frequency of the elements in the frequency domain precoding corresponding to the first PRS form a first linear relationship, the phase and frequency of the elements in the frequency domain precoding corresponding to the second PRS form a second linear relationship, and the first linear relationship and the second linear relationship are the same.

22. The device according to claim 21, characterized in that The first linear relationship is the same as the second linear relationship, including: The slopes of the first linear relationship and the second linear relationship are the same.

23. A communication device, characterized in that: include: A processor and a memory, wherein the processor is coupled to the memory and is configured to read and execute instructions in the memory to perform the method according to any one of claims 1 to 7.

24. A communication device, characterized in that: include: A processor and a memory, wherein the processor is coupled to the memory and is configured to read and execute instructions in the memory to perform the method according to any one of claims 8 to 11.

25. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program code, and when the computer program code is executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 11.

26. A chip, characterized in that: include: A circuit for executing the method according to any one of claims 1 to 11.

27. A terminal device, characterized in that: include: A device as claimed in any one of claims 12 to 18.

28. A network device, characterized in that: include: A device as claimed in any one of claims 19 to 22.

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