Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus. The method can be applied to the field of communications. The method comprises: acquiring an association relationship between a first positioning reference signal (PRS) resource set and a second PRS resource set, wherein the first PRS resource set and the second PRS resource set are located in different positioning frequency layers (PFLs); and receiving a first PRS and a second PRS on the basis of the association relationship and a first assumption, wherein the first PRS belongs to the first PRS resource set, 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 precoding corresponding to the first PRS and precoding corresponding to the second PRS are determined on the basis of the same delay parameter. By means of the method, even if there is transparent precoding, a terminal device measuring an aggregated PRS sent by a network device is not affected, thereby improving the accuracy of positioning the terminal device by a location server.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on September 27, 2023, with application number 202311279794.5 and application name “Communication Method and Communication Device,” the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and more particularly, to a communication method and a communication device. Background Art

[0003] The 3rd Generation Partnership Project (3GPP) Release 17 (R17) standard supports multiple positioning technologies, 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). DL-TDOA, UL-TDOA, and multi-RTT algorithms are time-of-arrival (TOA)-based positioning technologies. This requires the receiver to measure the time of arrival of the signal sent by the transmitter, converting it into the distance between the two, and ultimately determining the location of the target. DL-AOD and UL-AOA are angle-based positioning technologies. The receiver measures the angle of arrival of a reference signal sent by the transmitter and then infers the receiver's location based on the angle information between the receiver and multiple transmitters with known locations.

[0004] When applying the above technologies for positioning, positioning accuracy can be improved through aggregated positioning technology. For example, network devices can send aggregated positioning reference signals (PRS) through continuously aggregated positioning frequency layers (PFL) within the frequency band. Because aggregated PRS have a larger bandwidth, terminal devices can obtain more accurate measurement results when measuring aggregated PRS.

[0005] However, in practical applications, the aforementioned aggregate positioning technology may be affected by protocol-transparent precoding, which in turn affects positioning accuracy. The protocol-transparent precoding can be understood as the precoding corresponding to the PRS sent by the network device, the content of which is unknown to the terminal device.

[0006] Summary of the Invention

[0007] The present application provides a communication method and a communication device, so that 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 terminal device's positioning by the positioning server.

[0008] In a first aspect, a communication method is provided, the method including: 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 based on 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.

[0009] Optionally, the association relationship between the first PRS resource set and the second PRS resource set may be understood as an aggregation relationship.

[0010] Optionally, the execution subject of the above method may be a terminal device.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the first linear relationship and the second linear relationship are the same, including: the first linear relationship and the second linear relationship have the same slope.

[0015] 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, wherein 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; and sending the first measurement result to a positioning server.

[0016] 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.

[0017] Optionally, the information corresponding to the above-mentioned reference signal may be specifically 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 of path arrival), path arrival angle (angle of path arrival), reference signal Doppler component (reference signal doppler component), reference signal path Doppler component (reference signal path doppler component), and terminal equipment speed (UE velocity).

[0018] 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.

[0019] In combination with the first aspect, in certain 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, where the bandwidth of the third PRS is greater than the bandwidth of the first PRS and the second PRS; and determining the first measurement result based on the third PRS.

[0020] In this 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, because the third PRS has a larger bandwidth than the first PRS and the second PRS, the first measurement result can be more accurate, thereby making the positioning result performed by the positioning server more accurate.

[0021] In combination with the first aspect, in some 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.

[0022] In a second aspect, a communication method is provided, the method including: 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 based on 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.

[0023] Optionally, the association relationship between the first PRS resource set and the second PRS resource set may be understood as an aggregation relationship.

[0024] Optionally, the execution subject of the above method may be a network device.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] In combination with the second aspect, in certain 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.

[0029] According to a third aspect, a communication device is provided, comprising: an acquisition unit and a processing unit; the acquisition 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 based on 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] In combination with the third aspect, in certain implementations of the third aspect, the device further 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.

[0034] 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, where 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.

[0035] 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.

[0036] 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, where the first PRS resource set and the second PRS resource set are located on different positioning frequency layers PFL; the processing unit is used to send a first PRS and a second PRS based on 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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 methods of the first aspect or the second aspect above.

[0041] 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 is run on a computer, the computer executes the method in any one of the implementation modes of the first aspect or the second aspect above.

[0042] In a seventh aspect, a chip is provided, which includes a circuit for executing the method in any one of the implementations of the first or second aspect above.

[0043] In an eighth aspect, a computer program product is provided, which includes a computer program. When the computer program is run, the computer executes the method in any one of the implementation modes of the first aspect or the second aspect.

[0044] In a ninth aspect, a terminal device is provided, comprising: an apparatus according to any one of the implementation methods in the third aspect above.

[0045] In a tenth aspect, a network device is provided, comprising: an apparatus according to any one of the implementation methods in the fourth aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] FIG1 is a schematic diagram of an uplink-based positioning process provided in an embodiment of the present application;

[0047] FIG2 is a schematic diagram of a three-sided positioning system according to an embodiment of the present application;

[0048] FIG3 is a schematic diagram of CC distribution within and between frequency bands provided by an embodiment of the present application;

[0049] FIG4 is a schematic flowchart of a positioning reference signal aggregation process on different PFLs provided by an embodiment of the present application;

[0050] FIG5 is a schematic diagram showing the effect of phase continuity between PFLs on ToA estimation provided by an embodiment of the present application;

[0051] FIG6 is a schematic diagram of an aggregation estimation error caused by different precoding provided in an embodiment of the present application;

[0052] FIG7 is a system architecture diagram applicable to a communication method provided in an embodiment of the present application;

[0053] FIG8 is a schematic flow chart of a communication method provided in an embodiment of the present application;

[0054] FIG9 is a schematic flow chart of another communication method provided in an embodiment of the present application;

[0055] FIG10 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0056] FIG11 is a schematic diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0057] The technical solution in this application will be described below with reference to the accompanying drawings.

[0058] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: 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.

[0059] 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 capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile network (PLMN), etc., and the embodiments of the present application are not limited to this.

[0060] 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 evolved 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 embodiment of the present application is not limited.

[0061] 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 and downlink arrival angle positioning. The main process includes: generation of positioning request, transmission of resource configuration information, signal transmission and measurement, and transmission of measurement information.

[0062] To facilitate understanding of the embodiments of the present application, first, a brief introduction to the concepts and technologies involved in the embodiments of the application is given.

[0063] 1. PRS

[0064] The main purpose of PRS is to support high-precision device positioning services, including indoor and outdoor positioning. Terminal devices can determine their own position coordinates by receiving and processing PRS from different positioning reference signal sources.

[0065] 2. PRS resources

[0066] Time-frequency resources used to send PRS signals.

[0067] 3. PRS Resource Set

[0068] 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.

[0069] 4. Uu port

[0070] 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.

[0071] 5. Component Carrier (CC)

[0072] Refers to the carriers corresponding to different cells participating in carrier aggregation.

[0073] 6. Carrier Aggregation

[0074] To provide higher wireless channel bandwidth, multiple consecutive or non-consecutive carriers are aggregated into a larger bandwidth to meet higher data rate or measurement requirements.

[0075] 7. Cramero's Lower Bound

[0076] The theoretical accuracy bound used to measure parameter estimation is the theoretical minimum value of the ToA estimation error. The error of the actual ToA measurement estimation can only approach this lower bound infinitely, but will not be less than this lower bound.

[0077] 8. PFL

[0078] 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.

[0079] 9. Cyclic delay diversity (CDD)

[0080] 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.

[0081] The following introduces the technical problems to be solved by this application and the technical solutions adopted.

[0082] 3GPP's R17 standard supports multiple positioning technologies, including DL-TDOA, DL-AOD, UL-TDOA, UL-AOA, and multi-RTT. DL-TDOA, UL-TDOA, and multi-RTT algorithms are time-of-arrival (TOA)-based positioning technologies. This requires the receiver to measure the arrival time of the signal sent by the transmitter, convert it into the distance between the two, and ultimately determine the location of the target. DL-AOD and UL-AOA are angle-based positioning technologies. The receiver measures the angle of arrival of a reference signal sent by the transmitter and then infers the receiver's location based on the angle information between the receiver and multiple transmitters with known locations.

[0083] The following briefly introduces the positioning process using DL-TDOA technology as an example:

[0084] For downlink-based solutions, PRS needs to be measured 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 this 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 shown in Figure 1.

[0085] The following describes in detail the method of calculating the position of the target to be located based on the LMF DL-TDOA technology with reference to FIG2 .

[0086] As shown in Figure 2, assuming that the positions of the three base stations are known, the coordinates of the i-th 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 r i , then the arrival time difference between any base station and the reference base station is Δr i1 According to the definition of a hyperbola (the distance from two fixed points is constant), the target is located on the hyperbola with two base stations as foci, and the following set of equations can be listed:

[0087] In the above two equations, c is the speed of light, because there are only two unknowns (x UE ,y UE ), the location 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 solution. 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 triangulation positioning (including: DL-TDOA, UL-TDOA, DL-AOD, UL-AOA), it is necessary to obtain the distance or angle information of 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 amount of multiple cells or multiple sites to complete three-sided or triangulation positioning.

[0089] For downlink trilateration, the terminal device can measure the air propagation time of the signal to the base station, i.e., the time of arrival (ToA), based on the received positioning reference signal, and then obtain the TDoA of different sites, thus completing trilateration. Obviously, the positioning accuracy is positively correlated with the ToA measurement accuracy. Combining estimation theory with the characteristics of orthogonal frequency division multiplexing (OFDM) transmission systems, it can be derived that the Cramer-Rao lower bound of the mean square error of ToA estimation is:

[0090] Where 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. The above formula shows that the ToA estimation error is inversely correlated with the positioning reference signal bandwidth. A larger bandwidth reduces the lower bound of the error and increases the ToA estimation accuracy.

[0091] One way to improve ToA estimation accuracy is to increase the bandwidth corresponding to the positioning reference signal. 3GPP divides the entire wireless spectrum from low to high into frequency bands corresponding to a certain range of spectrum according to certain rules. The maximum bandwidth of a single carrier is 100 MHz. To obtain a larger bandwidth for sending positioning reference signals and thus improve ToA estimation accuracy, the current 3GPP R18 standard supports the transmission of positioning reference signals using continuous carrier aggregation within a frequency band. As shown in Figure 3, for two-carrier aggregation, only CC1 and CC2 aggregation is supported. CC1 and CC3 aggregation is not supported because CC1 and CC3 are non-contiguous CCs within the band. Similarly, aggregation of CC in band #n and CC in band #n+1 is not supported because they belong to CCs in different frequency bands.

[0092] It should be understood that the aggregation of downlink CC1 and CC2 corresponds to the aggregation of PLF1 and PLF2. In the embodiment of the present application, CC aggregation and PFL aggregation can be used interchangeably.

[0093] As shown in Figure 4, taking the downlink aggregation of PLF1 and PLF2 as an example, the following describes how PRSs are aggregated on different PFLs:

[0094] S401, LMF sets the configuration of PRS and sends the configuration information of PRS to the terminal device and the base station.

[0095] 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.

[0096] S402, LMF sends a measurement request to the terminal device, requesting the terminal device to perform aggregate positioning measurement on the same symbol.

[0097] S403: After receiving the configuration information, the base station may send a PRS signal.

[0098] In step S404 , the terminal device receives the PRSs of PFL1 and PFL2 on the same symbol, and concatenates 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.

[0099] S405: The terminal device converts the ToA into TDoA and reports it to the LMF.

[0100] S406: LMF performs positioning calculation based on the reported value.

[0101] Among them, in order to ensure the accuracy of the splicing measurement of the two PFL channels in step S404, phase continuity is required between the two PFLs. As shown in Figure 5, 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 (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, as shown in Figure 5 (b), the ToA estimated based on PFL1 and PFL2 is shown as the solid line, and its slope has an error with the slope corresponding to the true ToA (dashed line). It can be seen that the phase discontinuity between PFLs will cause the accuracy of the aggregated estimated ToA to decrease. In order to ensure the accuracy of the splicing measurement of the two PFL channels, phase continuity is required between the two PFLs.

[0102] However, the current in-band continuous aggregation positioning technology only considers the need to ensure phase continuity between PFLs, and does not consider the impact of protocol-transparent precoding on PRS on positioning (protocol transparency can 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 its content is unknown to the terminal device side).

[0103] 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 actual PRS signals 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 PRS precoding is present, the channel observed by the terminal device side is a combination of the actual channel and the precoding, so the positioning accuracy is affected by the precoding.

[0104] For example, when When cyclic delay precoding with two different delays τ1 and τ2 is added to PRS1 and PRS2 respectively, the difference between τ1 and τ2 leads to different channel changes observed by the terminal device side, which results in a decrease in the accuracy of the aggregated estimation. As shown in Figure 6, the slopes of the corresponding phase-frequency curves of PRS1 and PRS2 (as shown by the dotted lines) are different, which will lead to a decrease in the accuracy of the aggregated estimation during aggregation.

[0105] 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.

[0106] The embodiments of the present application provide a communication method and a communication device that can improve the accuracy of positioning a terminal device in the presence of transparent precoding.

[0107] FIG7 is a system architecture diagram applicable to a communication method provided in an embodiment of the present application.

[0108] As shown in Figure 7, in this architecture, a terminal device connects to the radio access network via the ng-eNB and gNB, respectively, via the LTE-Uu and / or NR-Uu interfaces. The radio access network connects to the core network via the access and mobility management function (AMF) unit via the NG-C interface. The next-generation radio access network (NG-RAN) includes one or more ng-eNBs; the NG-RAN may also include one or more gNBs; and the NG-RAN may also include one or more ng-eNBs and gNBs. The ng-eNB and gNB communicate via the Xn interface. The ng-eNB is an LTE access network device that accesses the 5G core network, and the gNB is a 5G access network device that accesses the 5G core network. The core network includes units such as the AMF and LMF (or evolved serving mobile location center (E-SMLC)). The AMF is used to implement functions such as access management, and the LMF (or E-SMLC) is used to implement functions such as positioning. The AMF and LMF are connected via the NL1 interface. LMF is a device or component deployed in the core network to provide positioning functions for terminal devices.

[0109] FIG8 is a schematic flowchart of a communication method provided in an embodiment of the present application. Method 800 may include steps S801 to S805.

[0110] S801: The terminal device and the network device obtain an association relationship between a first PRS resource set and a second PRS resource set.

[0111] The first PRS resource set and the second PRS resource set may be located on different PFLs.

[0112] Optionally, the association relationship between the first PRS resource set and the second PRS resource set may be understood as an aggregation relationship.

[0113] Optionally, the terminal device and the network device may obtain the association relationship between the first PRS resource set and the second PRS resource set from the positioning server.

[0114] S802: The network device sends a first PRS and a second PRS according to the association relationship and the first assumption.

[0115] 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.

[0116] In one embodiment, the first PRS and the second PRS have the same precoding, which includes: the first PRS and the second PRS have the same spatial domain precoding or the same frequency domain precoding.

[0117] 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 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.

[0118] Optionally, the fact that the first linear relationship and the second linear relationship are the same may be understood as: the slopes of the first linear relationship and the second linear relationship are the same.

[0119] It should be understood that in the embodiments of the present application, the network device and the base station may be the same concept.

[0120] S803: The terminal device determines a first measurement result according to the first PRS and the second PRS.

[0121] The first measurement result may be 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.

[0122] 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.

[0123] 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.

[0124] In one embodiment, step S803 specifically includes: the terminal device aggregating the first PRS and the second PRS to obtain a third PRS, where the bandwidth of the third PRS is greater than the bandwidth of the first PRS and the second PRS; and determining the first measurement result based on the third PRS. In this way, because the third PRS has a larger bandwidth than the first PRS and the second PRS, the first measurement result can be more accurate, thereby ensuring more accurate positioning results performed by the positioning server.

[0125] Optionally, in this embodiment, the first measurement result may include at least one of the following items corresponding to the third PRS: time difference of arrival TDOA, angle of departure AOD, power information, speed information, and Doppler information.

[0126] S804: The terminal device sends a first measurement result to the positioning server.

[0127] S805: The positioning server locates the terminal device according to the first measurement result.

[0128] Specifically, the positioning server can locate the terminal device according to the method described in FIG. 2 and its text part, which will not be repeated here.

[0129] 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.

[0130] FIG9 is a schematic flowchart 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 .

[0131] S901, LMF sends auxiliary data to the base station and terminal equipment.

[0132] The auxiliary data may include PRS resource information, and the PRS resource information includes: aggregation association relationship between PRS resource sets, that is, indicating which resources between PRS sets can be aggregated and sent; each PRS resource set may include PRS time-frequency resource information.

[0133] S902, LMF sends positioning request information to the terminal device.

[0134] The positioning request information may be used to request the terminal device to perform aggregate positioning measurement.

[0135] S903: The base station sends a PRS signal to the terminal device according to the PRS resource information received in step S903.

[0136] S904: The terminal device receives the PRS according to the first assumption and performs PRS measurement.

[0137] The first assumption may be that: the PRSs have the same precoding or the precoding is determined based on the same delay parameter; and the terminal device measures the PRSs to obtain a measurement result.

[0138] Optionally, the above-mentioned PRS may be a polymerized PRS.

[0139] Optionally, the above-mentioned PRS has the same precoding or the precoding is determined based on the same delay parameter, which can be understood as: the above-mentioned PRS includes a first PRS and a second PRS, and the precoding of the first PRS and the second PRS is the same or the precoding is determined based on the same delay parameter.

[0140] S905: The terminal device reports the measurement result to the LMF.

[0141] S906: LMF locates the terminal device according to the measurement results.

[0142] Among them, LMF can locate the terminal device according to the method described in Figure 2 and its text part, which will not be repeated here.

[0143] 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.

[0144] 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.

[0145] 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 ,…,w2M ] 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.

[0146] In this implementation, the spatial precoding matrices or vectors 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 transmission weights on the transmitting antennas are the same.

[0147] In an embodiment of the present application, by sending PRS through the same antenna and the corresponding transmission weights of the antennas, 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 aggregated positioning.

[0148] The following describes a specific implementation manner in which the precoding of the first PRS and the second PRS in methods 800 and 900 is determined based on the same delay parameter.

[0149] 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 ,…,w2N ] T .

[0150] Then the PRS signals after frequency domain precoding are: X PRS1 =[w 11 s 11 ,w 12 s 12 ,…,w 1N s 1N ] T X PRS2 =[w 21 s 21 ,w 22 s 22 ,…,w 2N s 2N ] T

[0151] 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,

[0152] As shown in Figure 6 and the corresponding text, 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:

[0153] 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.

[0154] 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.

[0155] 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 by each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0156] Figure 10 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 communication interfaces or communication units. The processing unit 1030 is used to perform data processing so that the device 1000 implements the aforementioned communication method.

[0157] Optionally, the apparatus 1000 may further include a storage unit for implementing a corresponding storage function and storing corresponding instructions and / or data.

[0158] As a design, the apparatus 1000 may be used to execute the actions performed by the terminal device in the above method embodiment.

[0159] The apparatus 1000 includes: an acquisition unit 1010 and a processing unit 1030; the acquisition unit 1010 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 1030 is configured to receive a first PRS and a second PRS based on 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.

[0160] 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.

[0161] 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.

[0162] 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.

[0163] In a possible implementation, the first linear relationship and the second linear relationship are the same, including: the first linear relationship and the second linear relationship have the same slope.

[0164] 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, 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 1020 is used to send the first measurement result to the positioning server.

[0165] 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 the bandwidth of the third PRS is greater than the bandwidths of the first PRS and the second PRS; and determine the first measurement result according to the third PRS.

[0166] In a possible implementation, the first measurement result includes at least one of the following information corresponding to the third PRS: time difference of arrival TDOA, angle of departure AOD, power information, speed information, and Doppler information.

[0167] 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 embodiment.

[0168] The apparatus 1000 includes: an acquisition unit 1010 and a processing unit 1030; the acquisition unit 1010 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 positioning frequency layers PFL; the processing unit 1030 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.

[0169] 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.

[0170] 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.

[0171] 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.

[0172] In a possible implementation, the first linear relationship and the second linear relationship are the same, including: the first linear relationship and the second linear relationship have the same slope.

[0173] FIG11 is a schematic diagram of another communication device 1100 provided in an embodiment of the present application.

[0174] The device 1100 includes a memory 1110, a processor 1120, and a communication interface 1130. The memory 1110, processor 1120, and communication interface 1130 are connected via 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 enable the device 1100 to implement the aforementioned communication method. Optionally, the memory 1110 can be coupled to the processor 1120 via an interface or integrated with the processor 1120.

[0175] It should be noted that the communication interface 1130 may be a transceiver device such as, but not limited to, a transceiver. The communication interface 1130 may also include an input / output interface.

[0176] The processor 1120 stores one or more computer programs, which include instructions. When the instructions are executed by the processor 1120, the apparatus 1100 executes the communication method in each of the above embodiments.

[0177] During implementation, each step of the above method can be completed by an integrated logic circuit of the hardware in the processor 1120 or by instructions in the form of software. The method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor. 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 combination with its hardware. To avoid repetition, it will not be described in detail here.

[0178] Optionally, the communication interface 1130 in FIG. 11 may implement the acquisition unit 1010 or the transceiver unit 1020 in FIG. 10 , and the processor 1120 in FIG. 11 may implement the processing unit 1030 in FIG. 10 .

[0179] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a program code. When the computer program code is executed on a computer, the computer executes any one of the methods in FIG. 1 to FIG. 9 .

[0180] An embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is executed, the computer executes any one of the methods in Figures 1 to 9 above.

[0181] An embodiment of the present application further provides a chip, comprising: a circuit, wherein the circuit is used to execute any one of the methods in FIG. 1 to FIG. 9 above.

[0182] An embodiment of the present application also provides a terminal device, including any one of the communication devices shown in Figure 10 or Figure 11.

[0183] An embodiment of the present application also provides a network device, including any one of the communication devices shown in FIG10 or FIG11 .

[0184] Those skilled 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 beyond the scope of this application.

[0185] Those skilled in the art will 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.

[0186] In the several embodiments provided in this 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 merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, 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.

[0187] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0188] 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.

[0189] 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, or the part that contributes to the prior art, or the part of the technical solution, 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 enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method 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.

[0190] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection 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 any one of 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, 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 belong to the first PRS resource set. The second PRS has 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 and the second linear relationship are the same, 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 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 perform 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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