CN115333589A

CN115333589A - Downlink departure angle determining method, network side, positioning end, device and storage medium

Info

Publication number: CN115333589A
Application number: CN202110511805.2A
Authority: CN
Inventors: 李刚; 任斌; 任晓涛; 达人
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2022-11-11

Abstract

The application provides a method, a network side, a positioning end, a device and a storage medium for determining a downlink departure angle, wherein the method comprises the following steps: determining a beam forming parameter and an antenna parameter used by each DL-PRS sent by the TRP and a difference parameter of the TRP, wherein the difference parameter comprises a parameter which is different in amplitude and phase of each antenna element transmission channel corresponding to the TRP; and sending the beam forming parameters, the antenna parameters and the difference parameters to a positioning end so that the positioning end can determine a downlink departure angle based on the beam forming parameters, the antenna parameters and the difference parameters. According to the method, the network side, the positioning end, the device and the storage medium, the beam forming parameters, the antenna parameters and the difference parameters of the DL-PRS are transmitted, on the premise that the positioning end obtains accurate DL-PRS beam distribution, the data transmission amount from the network side to the positioning end is greatly reduced, the positioning precision of the downlink departure angle is effectively improved, and transmission resources are saved.

Description

Downlink departure angle determining method, network side, positioning end, device and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method, a network side, a positioning end, an apparatus, and a storage medium for determining a downlink departure angle.

Background

In the current DL-AoD (Downlink Angle of Departure) Positioning method for NR (New radio, new air interface), a UE (User Equipment, terminal) receives DL-PRS (Downlink-Positioning Reference Signal) according to configuration information of a peripheral TRP (Transmit and Receive Point) provided by a network side, measures DL-PRS beams of various TRPs, and reports a RSRP (Reference Signal Receiving Power) measurement value to a LMF (Location Management Function). The LMF utilizes DL-PRS RSRP reported by the UE and other known information (such as the transmission direction of each DL-PRS beam of each TRP) to determine the angle of the UE relative to each TRP, namely DL-AoD.

In this process, the positioning accuracy of the DL-AoD is not high because the LMF does not have the beam distribution information of the DL-PRS. However, the spatial distribution of each DL-PRS beam is different and must be described separately, and if the beam distribution information of each DL-PRS beam is directly transmitted to the LMF through the network side, the amount of data to be transmitted is enormous.

Content of application

The application provides a downlink departure angle determining method, a network side, a positioning end, a device and a storage medium, which are used for solving the problem of downlink departure angle positioning accuracy.

In a first aspect, an embodiment of the present application provides a method for determining a downlink departure angle, where the method is applied to a network side, and the method includes:

determining a beam forming parameter and an antenna parameter used by a receiving and transmitting point TRP for transmitting each downlink positioning reference signal DL-PRS, and a difference parameter of the TRP, wherein the difference parameter comprises a parameter which is different between the amplitude and the phase of each antenna element transmission channel corresponding to the TRP;

and sending the beam forming parameters, the antenna parameters and the difference parameters to a positioning end so that the positioning end can determine a downlink departure angle based on the beam forming parameters, the antenna parameters and the difference parameters.

Optionally, according to the method for determining a downlink departure angle in an embodiment of the present application, when the network side is a serving base station and the location end is a terminal, the sending the beamforming parameter, the antenna parameter, and the difference parameter to the location end includes:

sending the beamforming parameter, the antenna parameter and the difference parameter to the terminal based on at least one of Radio Resource Control (RRC) signaling, media access control (MAC-CE) signaling and Downlink Control Information (DCI) signaling;

or, the beamforming parameter, the antenna parameter and the diversity parameter are sent to a location management function unit LMF, and the LMF sends the beamforming parameter, the antenna parameter and the diversity parameter to the terminal based on an LTE positioning protocol LPP signaling.

Optionally, according to the method for determining a downlink departure angle in an embodiment of the present application, when the network side is a non-serving base station and the location end is a terminal, the sending the beamforming parameter, the antenna parameter, and the difference parameter to the location end includes:

sending the beamforming parameter, the antenna parameter and the difference parameter to a serving base station, and forwarding the beamforming parameter, the antenna parameter and the difference parameter to the terminal by the serving base station based on at least one of Radio Resource Control (RRC) signaling, media access control (MAC-CE) signaling and Downlink Control Information (DCI) signaling;

or, the beamforming parameter, the antenna parameter and the difference parameter are sent to a location management function unit LMF, and the LMF forwards the beamforming parameter, the antenna parameter and the difference parameter to the terminal based on an LTE positioning protocol LPP signaling.

Optionally, according to the downlink departure angle determining method in an embodiment of the present application, when the location end is a location management function unit LMF, the sending the beamforming parameter, the antenna parameter, and the difference parameter to the location end includes:

and sending the beamforming parameters, the antenna parameters and the difference parameters to the LMF based on a new air interface positioning protocol A.

Optionally, according to the method for determining a downlink departure angle in an embodiment of the present application, the difference parameter includes at least one of gain delay information of each RF channel in the corresponding TRP, delay information from each RF channel to each antenna element, and gain information of each antenna element.

In a second aspect, an embodiment of the present application provides a method for determining a downlink departure angle, where the method is applied to a location end, and the method includes:

receiving a beam forming parameter and an antenna parameter used by a receiving and transmitting point TRP for transmitting each downlink positioning reference signal DL-PRS, and a difference parameter of the TRP, wherein the difference parameter comprises a parameter which is different between the amplitude and the phase of each antenna element transmitting channel corresponding to the TRP;

and determining a downlink departure angle based on the beamforming parameters, the antenna parameters and the difference parameters.

Optionally, according to a downlink departure angle determining method in an embodiment of the present application, the determining a downlink departure angle based on the beamforming parameter, the antenna parameter, and the difference parameter includes:

determining first beam spatial distribution information of the DL-PRS based on the beamforming parameters and the antenna parameters;

correcting the first beam space distribution information based on the difference parameters to obtain second beam space distribution information;

and determining the downlink departure angle based on the second beam space distribution information.

Optionally, according to the method for determining a downlink departure angle according to an embodiment of the present application, the determining, based on the beamforming parameter and the antenna parameter, first beam spatial distribution information of the DL-PRS includes:

determining a beamforming matrix based on the beamforming parameters;

determining an antenna array steering matrix based on the antenna parameters;

and determining the first beam space distribution information based on the beam forming matrix and the antenna array steering matrix.

Optionally, according to the method for determining a downlink departure angle in an embodiment of the present application, the correcting the first beam spatial distribution information based on the difference parameter to obtain second beam spatial distribution information includes:

constructing a correction matrix based on the difference parameters;

and correcting the first beam space distribution information based on the correction matrix to obtain second beam space distribution information.

Optionally, according to a method for determining a downlink departure angle in an embodiment of the present application, the determining the downlink departure angle based on the second beam spatial distribution information includes:

correcting the second beam space distribution information based on Reference Signal Received Power (RSRP) distribution information of the DL-PRS to obtain third beam space distribution information;

and determining the downlink departure angle based on the third beam space distribution information.

Optionally, according to the downlink departure angle determining method in an embodiment of the present application, the correcting the second beam spatial distribution information based on the reference signal received power RSRP distribution information of the DL-PRS to obtain a third beam spatial distribution information includes:

determining a beam residual angular deviation of the second beam spatial distribution information based on the RSRP distribution information and the second beam spatial distribution information;

and correcting the second beam space distribution information based on the beam residual angle deviation to obtain the third beam space distribution information.

Optionally, according to the method for determining a downlink departure angle according to an embodiment of the present application, when the positioning end is a positioning management function unit LMF, the method corrects the second beam spatial distribution information based on RSRP distribution information of the DL-PRS to obtain third beam spatial distribution information, and before the method further includes:

receiving Reference Signal Received Power (RSRP) and a receiving position of the DL-PRS sent by a reference terminal;

and determining the RSRP distribution information based on the RSRP and the receiving position of the DL-PRS and the antenna position of the TRP corresponding to the DL-PRS.

Optionally, according to the downlink departure angle determining method in an embodiment of the present application, when the positioning end is a terminal, the second beam spatial distribution information is corrected based on the reference signal received power RSRP distribution information of the DL-PRS to obtain third beam spatial distribution information, and the method further includes:

receiving Reference Signal Received Power (RSRP) and a receiving position of the DL-PRS forwarded by a reference terminal through a positioning management function unit (LMF) or a network side;

Optionally, according to a method for determining a downlink departure angle in an embodiment of the present application, when the positioning end is a positioning management function unit LMF, the receiving and sending point TRP sends a beamforming parameter and an antenna parameter used by each downlink positioning reference signal DL-PRS, and a difference parameter of the TRP includes:

and receiving the beamforming parameters, the antenna parameters and the difference parameters sent by a network side based on a new air interface positioning protocol A.

Optionally, according to a method for determining a downlink departure angle in an embodiment of the present application, when the positioning end is a terminal, the receiving and transmitting point TRP transmits a beamforming parameter and an antenna parameter used by each downlink positioning reference signal DL-PRS, and a difference parameter of the TRP includes:

receiving the beamforming parameter, the antenna parameter and the difference parameter which are sent by a serving base station based on at least one of Radio Resource Control (RRC) signaling, media access control (MAC-CE) signaling and Downlink Control Information (DCI) signaling, wherein the beamforming parameter, the antenna parameter and the difference parameter are sent to the serving base station after the serving base station determines or a non-serving base station determines;

or, receiving the beamforming parameter, the antenna parameter and the difference parameter forwarded by the LMF based on the LTE positioning protocol LPP signaling, where the beamforming parameter, the antenna parameter and the difference parameter are sent to the LMF by the base station.

Optionally, according to the downlink departure angle determining method in an embodiment of the present application, the difference parameter includes at least one of gain delay information of each RF channel in the corresponding TRP, delay information from each RF channel to each antenna element, and gain information of each antenna element.

In a third aspect, an embodiment of the present application further provides a network side, including a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following:

determining a beam forming parameter and an antenna parameter used by a transmitting and receiving point TRP for transmitting each downlink positioning reference signal DL-PRS, and a difference parameter of the TRP, wherein the difference parameter comprises a parameter which is different in amplitude and phase of each antenna element transmitting channel corresponding to the TRP;

In a fourth aspect, an embodiment of the present application further provides a positioning end, including a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under the control of the processor; a processor for reading the computer program in the memory and performing the following operations:

and determining a downlink departure angle based on the beam forming parameters, the antenna parameters and the difference parameters.

In a fifth aspect, an embodiment of the present application further provides a downlink departure angle determining apparatus, including:

the data determining unit is used for determining a beamforming parameter and an antenna parameter used by a transmitting and receiving point TRP for transmitting each downlink positioning reference signal DL-PRS, and a difference parameter of the TRP, wherein the difference parameter comprises a parameter which is different between the amplitude and the phase of each antenna element transmitting path corresponding to the TRP;

and the data sending unit is used for sending the beam forming parameters, the antenna parameters and the difference parameters to a positioning end so that the positioning end can determine a downlink departure angle based on the beam forming parameters, the antenna parameters and the difference parameters.

In a sixth aspect, an embodiment of the present application further provides a downlink departure angle determining apparatus, including:

the data receiving unit is used for receiving beamforming parameters and antenna parameters used by a transmitting and receiving point TRP for transmitting each downlink positioning reference signal DL-PRS, and difference parameters of the TRP, wherein the difference parameters comprise parameters which are different in amplitude and phase of each antenna element transmitting channel corresponding to the TRP;

and the departure angle determining unit is used for determining a downlink departure angle based on the beamforming parameters, the antenna parameters and the difference parameters.

In a seventh aspect, this application embodiment further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program for causing the processor to execute the method according to the first aspect or the second aspect.

According to the downlink departure angle determining method, the network side, the positioning end, the device and the storage medium provided by the embodiment of the application, by transmitting the beam forming parameters of each DL-PRS, the antenna parameters and the difference parameters of each TRP, on the premise that the positioning end can obtain accurate DL-PRS beam distribution, the data transmission amount from the network side to the positioning end is greatly reduced, the positioning accuracy of the downlink departure angle is effectively improved, and meanwhile, transmission resources are saved.

Drawings

In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is one of the flow diagrams of a downlink departure angle determination method provided in the present application;

fig. 2 is a second schematic flow chart of the downlink departure angle determining method provided in the present application;

fig. 3 is a schematic diagram of a network-side structure provided in the present application;

FIG. 4 is a schematic view of a positioning end provided herein;

fig. 5 is a schematic structural diagram of a downlink departure angle determining apparatus provided in the present application;

fig. 6 is a second schematic structural diagram of the downlink departure angle determining apparatus provided in the present application.

Detailed Description

In the embodiment of the present application, the term "and/or" describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B, and may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In the current NR system, a network side performs transmission of DL-PRS beams, and the network side can acquire spatial distribution of the DL-PRS beams according to grasped information. However, the LMF and UE do not have spatial distribution information of DL-PRS beams. In the DL-AoD positioning method, if the LMF or the UE can acquire the detailed information of the DL-PRS beam spatial distribution, the accuracy of the DL-AoD positioning method can be improved.

However, the spatial distribution of each DL-PRS beam is different and must be described separately, and in order to accurately reflect the detailed information of the beam, each beam needs more data to be described. Each TRP on the network side needs to transmit multiple DL-PRS beams, and if the detailed distribution information of each DL-PRS beam is directly transmitted to the LMF or the UE, the amount of data to be transmitted is huge.

In view of the above problems, the present application provides a downlink departure angle determining method, which realizes higher-precision downlink departure angle positioning with less transmission data amount. Fig. 1 is a schematic flow diagram of a downlink departure angle determining method provided in the present application, and as shown in fig. 1, an execution subject of the method is a network side, and may be a serving base station or a non-serving base station. In the method, a main body for determining the downlink departure angle is a positioning end, and the positioning end can be an LMF (local mean square) or a terminal. The method comprises the following steps:

step 110, determining a beamforming parameter and an antenna parameter used by a transmitting and receiving point TRP to transmit each downlink positioning reference signal DL-PRS, and a difference parameter of the TRP, where the difference parameter includes a parameter that is different between an amplitude and a phase of each antenna element transmission path corresponding to the TRP.

And step 120, sending the beam forming parameters, the antenna parameters and the difference parameters to a positioning end so that the positioning end can determine a downlink departure angle based on the beam forming parameters, the antenna parameters and the difference parameters.

Specifically, the sending of the downlink positioning reference signal DL-PRS is realized based on each receiving and sending point TRP on the network side, and the DL-PRS beam distribution under an ideal state can be deduced and calculated through the beam forming parameters and the antenna parameters of each TRP when the DL-PRS is sent.

Further, the beamforming parameters may include a beamforming parameter for analog beamforming and a beamforming parameter for digital beamforming. The analog beamforming parameters may include gain and time delay added to the transmission signal reaching each antenna element when the transmission signal passes through the analog beamforming circuit. The beamforming parameters for digital beamforming may include a precoding matrix for a codebook index for precoding. The antenna parameters are used to reflect the structural information of the transmit antenna array, such as: the position of the antenna elements, the shape and size of the antenna elements, the spacing of the antenna elements, etc.

When the TRP transmits the DL-PRS, the TRP is influenced by non-ideal factors, so that the beam distribution when the TRP actually transmits the DL-PRS can have larger deviation from the beam distribution in an ideal state. And the different parameters of the TRP, namely the parameters capable of reflecting non-ideal factors suffered by the TRP when the DL-PRS is transmitted. The diversity parameters of the TRP include parameters that differ between amplitude and phase of transmission paths of each antenna element of the TRP, where the transmission paths of the antenna elements may be divided into three parts, i.e., a Radio Frequency (RF) channel, a RF channel to the antenna element, and an antenna element, where differences that may exist between the amplitude and the phase of each part may reflect gains and delays of each part, for example, the diversity parameters may include a gain and a delay of each RF channel, a delay of each RF channel to each antenna element, and a gain of each antenna element.

Compared with the method that the detailed beam distribution information of DL-PRS transmitted by each TRP is directly transmitted to the positioning end, only the beam forming parameters and the antenna parameters used by each DL-PRS transmitted by each TRP and the difference parameters of the TRP are transmitted to the positioning end, the data transmission quantity from the network side to the positioning end can be greatly reduced. After receiving the beam forming parameters, the antenna parameters and the difference parameters, the positioning end can also deduce and calculate the DL-PRS beam distribution under the actual condition by combining the beam forming parameters, the antenna parameters and the difference parameters, thereby realizing more accurate positioning of the downlink departure angle. For example, the positioning end may calculate and derive DL-PRS beam distribution in an ideal state based on the beam forming parameters and the antenna parameters, correct the DL-PRS beam distribution in the ideal state based on the difference parameters, thereby obtaining DL-PRS beam distribution which is more accurate and conforms to an actual situation, and determine a downlink departure angle based on the corrected DL-PRS beam distribution.

It should be noted that, the sending of the beamforming parameters, the antenna parameters, and the difference parameters to the positioning end in step 120 is not limited to the sequence of the three types of parameters in data transmission, and the three types of parameters may be carried in the same signaling by the network side and sent to the positioning end together, or may be carried in different signaling by the network side and sent to the positioning end at the same or different time respectively.

According to the method provided by the embodiment of the application, by transmitting the beam forming parameters, the antenna parameters and the difference parameters of all the TRPs of all the DL-PRSs, on the premise that the positioning end can obtain accurate DL-PRS beam distribution, the data transmission amount from the network side to the positioning end is greatly reduced, the positioning precision of the downlink departure angle is effectively improved, and meanwhile, the transmission resources are saved.

Based on the above embodiments, the network side may be a serving base station or a non-serving base station, and the location side may be an LMF or a UE. The specific implementation of step 120 is different for different combinations of network side and location side.

Based on any of the above embodiments, when the network side is the serving base station and the location end is the terminal, step 120 includes:

based on at least one of Radio Resource Control (RRC) signaling, media access control (MAC-CE) signaling and Downlink Control Information (DCI) signaling, transmitting a beam forming parameter, an antenna parameter and a difference parameter to a terminal;

or sending the beam forming parameters, the antenna parameters and the difference parameters to a location management function unit LMF, and sending the beam forming parameters, the antenna parameters and the difference parameters to a terminal by the LMF based on an LTE (Long term evolution) location protocol LPP (Long term evolution) signaling.

Specifically, when the network side is the serving base station, the serving base station may directly communicate with the terminal, or may forward the transmission data to the terminal through the LMF.

For the case that the serving base station directly communicates with the terminal, the serving base station may send the beamforming parameter, the antenna parameter, and the difference parameter to the terminal through at least one of RRC (Radio Resource Control), MAC-CE (Medium Access Control-Control Element), and DCI (Downlink Control Information). Here, the same signaling may be used for transmitting the beamforming parameter, the antenna parameter, and the difference parameter, or different signaling may be used, for example, the serving base station may transmit the beamforming parameter and the antenna parameter through RRC signaling, transmit the difference parameter through DCI signaling, and transmit the beamforming parameter, the antenna parameter, and the difference parameter through RRC signaling.

For the case that the serving base station performs data forwarding through the LMF, the serving base station may transmit a beamforming parameter, an antenna parameter, and a difference parameter to the LMF through an NRPPa (NR Positioning Protocol a) signaling, and after receiving the three parameters, the LMF forwards the three parameters to the terminal through an LPP (LTE Positioning Protocol) signaling. It should be noted that the three parameters of the serving base station may be sent together or separately, and correspondingly, the LMF may receive the three parameters simultaneously or separately, and the LMF may forward the data as soon as receiving the three parameters, or forward the data as soon as receiving the three parameters.

Based on any of the above embodiments, when the network side is a non-serving base station and the location end is a terminal, step 120 includes:

the method comprises the steps that a beam forming parameter, an antenna parameter and a difference parameter are sent to a service base station, and the service base station forwards the beam forming parameter, the antenna parameter and the difference parameter to a terminal based on at least one of Radio Resource Control (RRC) signaling, media access control (MAC-CE) signaling and Downlink Control Information (DCI) signaling;

or the beam forming parameters, the antenna parameters and the difference parameters are sent to a location management function unit LMF, and the LMF forwards the beam forming parameters, the antenna parameters and the difference parameters to the terminal based on an LTE (Long term evolution) location protocol LPP (Long term evolution) signaling.

Specifically, when the network side is a non-serving base station, the non-serving base station needs to communicate with the terminal through the serving base station, and may also forward the transmission data to the terminal through the LMF.

For the case that the non-serving base station forwards data through the serving base station, the non-serving base station may send the beamforming parameter, the antenna parameter, and the difference parameter to the serving base station, and after receiving the three parameters, the serving base station sends the three parameters to the terminal through at least one of RRC signaling, MAC-CE signaling, and DCI signaling. Here, when the serving base station performs forwarding, the beam forming parameter, the antenna parameter, and the difference parameter may use the same signaling, or may use different signaling for transmission, for example, the serving base station may transmit the beam forming parameter and the antenna parameter through RRC signaling, transmit the difference parameter through DCI signaling, or transmit the beam forming parameter, the antenna parameter, and the difference parameter through RRC signaling. It should be noted that the three parameters of the non-serving base station may be transmitted together or separately, and correspondingly, the serving base station may receive the three parameters simultaneously or separately, and the data forwarding of the serving base station may be performed as soon as receiving and forwarding, or may be performed after receiving the three parameters.

Aiming at the situation that the non-service base station forwards data through the LMF, the non-service base station can transmit the beam forming parameters, the antenna parameters and the difference parameters to the LMF through NRPPa signaling, and the LMF forwards the three parameters to the terminal through LPP signaling after receiving the three parameters. It should be noted that the three parameters of the non-serving base station may be sent together or separately, and correspondingly, the LMF may receive the three parameters simultaneously or separately, and the LMF may forward the data as soon as receiving the three parameters, or may forward the data after receiving the three parameters together.

Based on any of the above embodiments, when the location end is the location management function unit LMF, step 120 includes:

and based on the new air interface positioning protocol A, sending the beam forming parameters, the antenna parameters and the difference parameters to the LMF.

Specifically, for the case that the location end is an LMF, the location end may directly communicate with the LMF regardless of whether the network side is a serving base station or a non-serving base station. The data transmission from the network side to the LMF can be realized by a new air interface positioning protocol a, i.e., NRPPa.

Based on any of the above embodiments, the diversity parameter includes at least one of gain delay information of each radio frequency RF channel in the corresponding TRP, delay information from each RF channel to each antenna element, and gain information of each antenna element.

The gain delay information of the RF channels is used to indicate the gain and delay of the RF channels, where the gain and delay may be absolute values of each RF channel, or may be relative values with respect to a specific RF channel, and the specific RF channel referred to herein may be the first channel or the dedicated calibration channel, or may be a pre-specified channel. The gain and delay of the RF channel can be obtained by dedicated calibration circuitry.

The delay information from the RF channel to each antenna element is used to indicate the delay from the RF channel to each antenna element, where the delay may be an absolute value from the RF channel to each antenna element, or a relative value with respect to a specific antenna element, where the specific antenna element referred to herein may be the first antenna element or a dedicated calibration antenna element, or a pre-specified one of the antenna elements. The time delay of the RF channel to each antenna element can be obtained by a dedicated calibration circuit.

The gain information of the antenna element is used to indicate the gain of the antenna element, where the gain may be an absolute value of the antenna element, or may be a relative value for a specific antenna element, where the specific antenna element referred to herein may be the first antenna element or the dedicated calibration antenna element, or may be a pre-specified antenna element. The gain of the antenna element can be provided by an antenna manufacturer, or can be measured in advance through an instrument and stored on the network side.

Based on any of the above embodiments, fig. 2 is a second schematic flow chart of the downlink departure angle determining method provided by the present application, and as shown in fig. 2, an execution subject of the method is a positioning end, which may be an LMF or a terminal. The method comprises the following steps:

step 210, receiving a beam forming parameter and an antenna parameter used by a transmitting-receiving point TRP to transmit each downlink positioning reference signal DL-PRS, and a difference parameter of the TRP, wherein the difference parameter comprises a parameter which is different between the amplitude and the phase of each antenna element transmission channel corresponding to the TRP;

step 220, determining a downlink departure angle based on the beam forming parameters, the antenna parameters and the difference parameters.

Specifically, the sending of the downlink positioning reference signal DL-PRS is realized based on each receiving and sending point TRP on the network side, and the DL-PRS beam distribution in an ideal state can be deduced and calculated through the beam forming parameters and the antenna parameters of each TRP when the DL-PRS is sent.

Further, the beamforming parameters may include a beamforming parameter for analog beamforming and a beamforming parameter for digital beamforming. The shaping parameters of the analog beamforming may include a gain and a time delay added to the transmission signal reaching each antenna element when the transmission signal passes through the analog beamforming circuit. The beamforming parameters for digital beamforming may include a precoding matrix for a codebook index for precoding. The antenna parameters are used to reflect the structural information of the transmit antenna array, such as: the position of the antenna elements, the shape and size of the antenna elements, the spacing of the antenna elements, etc.

When the TRP transmits the DL-PRS, the TRP is influenced by non-ideal factors, so that the beam distribution when the TRP actually transmits the DL-PRS can have larger deviation from the beam distribution in an ideal state. And the differential parameter of the TRP, namely the parameter capable of reflecting the nonideal factors suffered by the TRP when the DL-PRS is transmitted. The differential parameters of the TRP include parameters that differ in amplitude and phase of each antenna element transmission path of the TRP, where the antenna element transmission path may be divided into three parts, i.e., a Radio Frequency (RF) channel, a RF channel to an antenna element, and an antenna element, where differences that may exist in amplitude and phase of each part may reflect gains and delays of each part, for example, the differential parameters may include a gain and a delay of each RF channel, a delay of each RF channel to each antenna element, and a gain of each antenna element.

Compared with the method that the network side directly sends the detailed beam distribution information of each TRP sent DL-PRS to the positioning end, the network side only sends the beam forming parameters and the antenna parameters used by each TRP sent DL-PRS and the difference parameters of the TRP to the positioning end, and the data transmission quantity from the network side to the positioning end can be greatly reduced. And after receiving the beam forming parameters, the antenna parameters and the difference parameters, the positioning end can also deduce and calculate the DL-PRS beam distribution under the actual condition by combining the beam forming parameters, the antenna parameters and the difference parameters, thereby realizing more accurate positioning of the downlink departure angle. For example, the positioning end may calculate and derive DL-PRS beam distribution in an ideal state based on the beam forming parameters and the antenna parameters, correct the DL-PRS beam distribution in the ideal state based on the difference parameters, thereby obtaining DL-PRS beam distribution which is more accurate and conforms to an actual situation, and determine a downlink departure angle based on the corrected DL-PRS beam distribution.

It should be noted that the beamforming parameters, the antenna parameters, and the difference parameters referred to in step 210 do not limit the sequence of the three types of parameters in data transmission, and the three types of parameters may be carried in the same signaling by the network side and transmitted to the positioning end together, or may be carried in different signaling by the network side and transmitted to the positioning end at the same or different time respectively.

According to the method provided by the embodiment of the application, by transmitting the beam forming parameters of each DL-PRS, the antenna parameters and the difference parameters of each TRP, on the premise that the positioning end can obtain accurate DL-PRS beam distribution, the data transmission amount from the network side to the positioning end is greatly reduced, the positioning accuracy of the downlink departure angle is effectively improved, and meanwhile, transmission resources are saved.

Based on any of the above embodiments, step 220 includes:

step 221, determining first beam space distribution information of the DL-PRS based on the beam forming parameters and the antenna parameters.

Step 222, based on the difference parameter, the first beam spatial distribution information is corrected to obtain the second beam spatial distribution information.

And 223, determining a downlink departure angle based on the second beam space distribution information.

Specifically, the positioning end may derive and calculate DL-PRS beam distribution in an ideal state based on received beam forming parameters and antenna parameters of each TRP for transmitting DL-PRS, where the beam distribution is denoted as first beam spatial distribution information.

Considering that the TRP is influenced by non-ideal factors when transmitting the DL-PRS, the beam distribution when the TRP actually transmits the DL-PRS can have a large deviation from the beam distribution in an ideal state. Therefore, it is necessary to apply the received difference parameters capable of reflecting the non-ideal factors received by the TRP when transmitting the DL-PRS, and correct the derived first beam spatial distribution information in the ideal state, so as to obtain the theoretical beam spatial distribution considering the non-ideal factors, which is referred to as second beam spatial distribution information here.

After the second beam space distribution information is obtained, the downlink departure angle can be calculated, and therefore accurate positioning of the downlink departure angle is achieved.

Based on any of the above embodiments, step 221 includes:

determining a beamforming matrix based on the beamforming parameters;

determining an antenna array steering matrix based on the antenna parameters;

first beam spatial distribution information is determined based on the beamforming matrix and the antenna array steering matrix.

Specifically, the beamforming parameters may include a beamforming parameter for analog beamforming and a beamforming parameter for digital beamforming. The forming parameters of the analog beamforming may include gain and time delay added to the transmission signal reaching each antenna element when the transmission signal passes through the analog beamforming circuit, and the analog beamforming matrix may be obtained by the forming parameters of the analog beamforming. The beamforming parameters of digital beamforming may include a precoding matrix of a codebook index for precoding. Combining the analog beamforming matrix and the precoding matrix, the beamforming matrix can be determined, which can be specifically expressed by the following formula:

W＝AD；

in the formula, W is a beamforming matrix, a is an analog beamforming matrix obtained based on analog beamforming parameters, and D is a precoding matrix included in digital beamforming parameters.

Further, the analog beamforming matrix a is expressed as the following equation:

for an antenna array with Q antenna elements, a beam is expected to be transmitted to a certain space angle, and the forming parameters of analog beam forming comprise: the gain a added to the transmit signal to each antenna element as it passes through the analog beamforming circuit _l And time delay tau _l . Where l represents the l-th antenna element. Omega ₀ Is the carrier frequency of the transmitted signal.

The antenna parameters are used to reflect the structural information of the transmit antenna array, such as: the position of the antenna elements, the shape and size of the antenna elements, the spacing of the antenna elements, etc. Through the antenna parameters, the antenna array steering matrix can be calculated as shown in the following formula:

wherein, F is the antenna array guiding matrix, Q is the total number of antenna elements in the antenna array, and P is the total number of antenna array transmitting angles. Phi is a _li For the phase of the ith antenna element at the ith transmission angle, where phi _li The specific form of (b) is related to the structure, parameters, etc. of the antenna array in the antenna parameters, for example, for a uniform linear array, at the ith transmission angle:

where d denotes the spacing of the antenna elements, theta _i Indicating the angular magnitude of the ith transmit angle. λ represents the wavelength of the transmitted signal.

On the basis, the first beam space distribution information corr under the ideal state can be calculated by combining the beam forming matrix W and the antenna array steering matrix F:

corr＝conj(W)*F

based on any of the above embodiments, step 222 includes:

constructing a correction matrix based on the difference parameters;

Specifically, according to the received difference parameters, the positioning end can obtain the difference between the gains of the RF channels, the delay difference of the transmission signal reaching each antenna element, and the gain difference of each antenna element under the real condition. Based on the method, the positioning end can calculate a correction factor of each antenna element in terms of gain and a correction factor of each antenna element in terms of time delay, and a correction matrix is constructed accordingly.

After the correction matrix is obtained, the correction matrix can be applied to correct the first beam spatial distribution information in an ideal state from two aspects of gain and delay, so that second beam spatial distribution information which can reflect the actual situation after correction is obtained.

Further, the correction matrix may be expressed in the form:

wherein C is a correction matrix, g _l Denotes a gain correction factor, τ ', of the l-th antenna element' _l Denotes the delay correction factor of the l-th antenna element, where g _l Can be expressed in the following form:

g _l ＝(g_ant _l +g_ch _l )

wherein, g _ ant _l Gain of the l-th antenna element, g _ ch _l The gain of the RF channel corresponding to the l antenna element;

τ′ _l may be the time delay of the RF channel to the l-th antenna element.

After the correction matrix C is obtained, the second beam spatial distribution information obtained by performing correction based on the correction matrix may be represented as:

corr′＝corr*C

where corr' is the second beam spatial distribution information.

Based on any of the above embodiments, step 223 includes:

correcting the second beam space distribution information based on Reference Signal Received Power (RSRP) distribution information of DL-PRS to obtain third beam space distribution information;

and determining a downlink departure angle based on the third beam space distribution information.

Specifically, the spatial distribution information of the second beam obtained by applying the difference parameter correction still reflects the spatial distribution in the theoretical state, and in order to further improve the reliability and accuracy of the beam spatial distribution, the second beam spatial distribution information in the theoretical state may be corrected by combining RSRP (Reference Signal Receiving Power) distribution information of the DL-PRS obtained by actual measurement, so as to obtain further corrected beam spatial distribution information, which is denoted as third beam spatial distribution information herein.

Here, the RSRP distribution information for correcting the beam spatial distribution is obtained by combining the RSRP and the reception position of the DL-PRS measured by each reference terminal and the TRP antenna position for transmitting the DL-PRS. For any DL-PRS beam, the reference terminal can report the position information of each receiving position, and the network side reports the antenna position of TRP. The positioning end can calculate the size of an angle between the receiving position of each reference terminal and the TRP antenna, namely the angle of beam emission. In addition, the reference terminal may also report RSRP received at each receiving position, and the positioning end obtains spatial distribution of beam power at the receiving position based on the RSRP and the beam transmission angle at each receiving position, that is, RSRP distribution information.

Based on the correction of the RSRP distribution information, the mutual coupling effect among TRP antenna elements and the influence of TRP antenna array installation errors on beam space distribution information estimation can be eliminated, so that more accurate beam space distribution information is obtained, and the positioning accuracy of a downlink starting angle is improved.

Based on any of the above embodiments, in step 223, the correcting the second beam spatial distribution information based on reference signal received power RSRP distribution information of the DL-PRS to obtain third beam spatial distribution information includes:

determining a beam residual angle deviation of the second beam space distribution information based on the RSRP distribution information and the second beam space distribution information;

and correcting the second beam space distribution information based on the beam residual angle deviation to obtain third beam space distribution information.

Specifically, when performing beam spatial distribution correction based on RSRP distribution information, the RSRP distribution information may be compared with the second beam spatial distribution information, thereby determining a residual angle deviation, i.e., a beam residual angle deviation, existing in the second beam spatial distribution information. Here, the beam residual angle deviation reflects the deviation between the beam distribution obtained by theoretical derivation and the beam distribution obtained by actual measurement.

After the beam residual angle deviation is obtained, the second beam spatial distribution information in the theoretical state may be corrected based on the beam residual angle deviation, so as to obtain corrected beam spatial distribution information, which is referred to as third beam spatial distribution information here.

Based on any of the above embodiments, in step 223, the RSRP distribution information used for correcting the beam spatial distribution is obtained by combining the RSRP of the DL-PRS, the receiving position, and the position of the TRP antenna for transmitting the DL-PRS, which are measured by each reference terminal. When the positioning terminal is an LMF or a terminal, the manner of acquiring the reference terminal receiving position and the RSRP measured at the receiving position are different.

When the location end is the location management function unit LMF, before the step 223 is executed, the method further includes:

receiving Reference Signal Received Power (RSRP) and a receiving position of DL-PRS sent by a reference terminal;

and determining RSRP distribution information based on the RSRP and the receiving position of the DL-PRS and the antenna position of TRP corresponding to the DL-PRS.

Specifically, in the case that the location end is an LMF, since the reference terminal may directly communicate with the LMF, both the receiving position of the reference terminal and the RSRP measured at the receiving position may be directly transmitted to the LMF. Further, data transmission between the reference terminal and the LMF may be achieved through LPP signaling.

When the positioning end is a terminal, before the step 223 is executed, the method further includes:

receiving Reference Signal Received Power (RSRP) and a receiving position of DL-PRS forwarded by a reference terminal through a positioning management function unit (LMF) or a network side;

and determining RSRP distribution information based on the RSRP and the receiving position of the DL-PRS and the antenna position of the TRP corresponding to the DL-PRS.

Specifically, when the positioning end is a terminal, the reference terminal cannot directly communicate with the terminal of the positioning end, and therefore the reference terminal is required to forward the receiving position to be transmitted and RSRP measured at the receiving position to the terminal of the positioning end through the LMF or the network side.

Further, in the scheme of forwarding based on the LMF, the reference terminal and the LMF, and the LMF and the terminal of the positioning end can all communicate through LPP signaling; in the method for forwarding based on the network side, the reference terminal can report the receiving position and the RSRP to the network side, and then the network side forwards the receiving position and the RSRP to the terminal of the positioning end through at least one of RRC signaling, MAC-CE signaling and DCI signaling.

Based on any of the above embodiments, the network side may be a serving base station or a non-serving base station, and the location side may be an LMF or a UE. The specific implementation of step 210 is different for different combinations of network side and location side.

Based on any of the above embodiments, when the location end is the location management function unit LMF, step 210 includes:

and receiving the beam forming parameters, the antenna parameters and the difference parameters sent by the network side based on the new air interface positioning protocol A.

Specifically, for the case that the location end is the LMF, the network side can directly communicate with the LMF regardless of whether the network side is the serving base station or the non-serving base station. The data transmission from the network side to the LMF can be realized by a new air interface positioning protocol a, i.e., NRPPa.

Based on any of the above embodiments, when the positioning end is a terminal, step 210 includes:

receiving a beam forming parameter, an antenna parameter and a difference parameter which are sent by a service base station based on at least one of a Radio Resource Control (RRC) signaling, a media access control element (MAC-CE) signaling and a Downlink Control Information (DCI) signaling, wherein the beam forming parameter, the antenna parameter and the difference parameter are sent to the service base station after the service base station is determined or a non-service base station is determined;

or, receiving a beam forming parameter, an antenna parameter and a difference parameter forwarded by a location management function unit LMF based on an LTE location protocol LPP signaling, where the beam forming parameter, the antenna parameter and the difference parameter are sent to the LMF by a base station.

Specifically, for the case where the location end is the terminal, when the network side is the serving base station, the serving base station may directly communicate with the terminal, or may forward the transmission data to the terminal through the LMF. At this time, the beamforming parameters, the antenna parameters and the diversity parameters are all determined by the serving base station.

Further, for the case that the serving base station directly communicates with the terminal, the serving base station may transmit the beamforming parameter, the antenna parameter, and the diversity parameter to the terminal through at least one of RRC, MAC-CE, and DCI. Accordingly, the terminal receives the beamforming parameter, the antenna parameter and the diversity parameter transmitted by the serving base station through at least one of RRC, MAC-CE and DCI. Here, the same signaling may be used for the beamforming parameters, the antenna parameters, and the difference parameters, or different signaling may be used for the transmission, for example, the serving base station may transmit the beamforming parameters and the antenna parameters through RRC signaling, transmit the difference parameters through DCI signaling, and transmit the beamforming parameters, the antenna parameters, and the difference parameters through RRC signaling.

For the situation that the service base station forwards data through the LMF, the service base station may transmit the beam forming parameter, the antenna parameter and the difference parameter to the LMF through NRPPa signaling, and the LMF forwards the three parameters to the terminal through LPP signaling after receiving the three parameters. Accordingly, the terminal receives three parameters forwarded by the LMF through the LPP. It should be noted that the three parameters of the serving base station may be sent together or separately, and correspondingly, the LMF may receive the three parameters simultaneously or separately, and the LMF may forward the data as soon as receiving the three parameters, or forward the data as soon as receiving the three parameters.

When the network side is a non-service base station, the non-service base station needs to communicate with the terminal through the service base station, and can also forward the transmission data to the terminal through the LMF. At this time, the beamforming parameters, the antenna parameters, and the diversity parameters are all determined by the non-serving base station.

For the case that the non-serving base station forwards data through the serving base station, the non-serving base station may send the beamforming parameter, the antenna parameter, and the difference parameter to the serving base station, and after receiving the three parameters, the serving base station sends the three parameters to the terminal through at least one of RRC signaling, MAC-CE signaling, and DCI signaling. Accordingly, the terminal receives the beamforming parameter, the antenna parameter and the diversity parameter forwarded by the serving base station through at least one of RRC, MAC-CE and DCI. Here, when the serving base station performs forwarding, the beamforming parameter, the antenna parameter, and the difference parameter may use the same signaling, or may use different signaling for transmission, for example, the serving base station may transmit the beamforming parameter and the antenna parameter through RRC signaling, transmit the difference parameter through DCI signaling, or transmit the beamforming parameter, the antenna parameter, and the difference parameter through RRC signaling. It should be noted that the three parameters of the non-serving base station may be transmitted together or separately, and correspondingly, the serving base station may receive the three parameters simultaneously or separately, and the data forwarding of the serving base station may be performed as soon as receiving and forwarding, or may be performed after receiving the three parameters.

Aiming at the situation that the non-service base station forwards data through the LMF, the non-service base station can transmit the beam forming parameters, the antenna parameters and the difference parameters to the LMF through NRPPa signaling, and the LMF forwards the three parameters to the terminal through LPP signaling after receiving the three parameters. Accordingly, the terminal receives three parameters forwarded by the LMF through the LPP. It should be noted that, the three parameters of the non-serving base station may be sent together or separately, and correspondingly, the LMF may receive the three parameters simultaneously or separately, and the data forwarding of the LMF may be forwarding while receiving, or forwarding after receiving the three parameters.

The gain delay information of the RF channels is used to indicate the gain and delay of the RF channels, where the gain and delay may be absolute values of each RF channel, or relative values with respect to a specific RF channel, and the specific RF channel referred to herein may be the first channel or a dedicated calibration channel, or may be a pre-designated channel. The gain and delay of the RF channel can be obtained by dedicated calibration circuitry.

The delay information from the RF channel to each antenna element is used to indicate the delay from the RF channel to each antenna element, where the delay may be an absolute value from the RF channel to each antenna element, or a relative value with respect to a specific antenna element, where the specific antenna element referred to herein may be a first antenna element or a dedicated calibrated antenna element, or a pre-specified antenna element. The time delay of the RF channel to each antenna element can be obtained by a dedicated calibration circuit.

The gain information of the antenna element is used to indicate the gain of the antenna element, where the gain may be an absolute value of the antenna element, or may be a relative value for a specific antenna element, where the specific antenna element referred to herein may be the first antenna element or the dedicated calibration antenna element, or may be a pre-specified antenna element. The gain of the antenna element can be provided by an antenna manufacturer, or can be measured in advance by an instrument and stored in a network side.

Based on any of the above embodiments, when the positioning end is an LMF, the method for determining the downlink departure angle includes:

firstly, a network side reports a forming parameter of analog beam forming of a TRP transmitter to an LMF.

After receiving the forming parameters of the analog beam forming, the LMF may construct an analog beam forming matrix based on the forming parameters of the analog beam forming.

In addition, the network side reports the digital beam forming parameters of the TRP transmitter to the LMF.

After receiving the digital beam forming parameters, the LMF may establish a beam forming matrix W in combination with the digital beam forming parameters and the analog beam forming matrix.

And the network side reports the antenna parameters of the TRP transmitter to the LMF.

After receiving the antenna parameters, the LMF may calculate a steering matrix F of the antenna array based on the antenna parameters. On the basis, the LMF can obtain the first beam spatial distribution information in an ideal state by combining the beam forming matrix W and the steering matrix F of the antenna array.

Particularly, the network side needs to obtain a difference parameter reporting LMF, where the difference parameter includes gain delay information of each RF channel, delay information from each RF channel to each antenna element, and gain information of each antenna element provided by a manufacturer or obtained by measurement in advance, where the gain delay information is obtained based on the calibration circuit.

The LMF may obtain the difference between the gains of the real RF channels, the delay difference of the transmission signal reaching each antenna element, and the gain difference of each antenna element according to the received differential parameters. Based on this, the LMF may calculate a per-antenna element gain correction factor and a per-antenna element delay correction factor and construct a correction matrix C therefrom.

Subsequently, the LMF may correct the first beam spatial distribution information in the ideal state by using the correction matrix C, so as to obtain second beam spatial distribution information in the theoretical state. The influence of the difference parameter of the TRP transmitter is fully considered in the step, and the accuracy of the beam distribution information can be effectively improved.

In addition, the reference terminal can be placed at different positions of a DL-PRS beam coverage area to measure RSRP, and the coordinates of each receiving position and the corresponding RSRP measurement value are reported to the LMF, so that the LMF obtains the RSRP of the DL-PRS beam at some known positions.

On the basis, the LMF compares the second beam space distribution information containing the influence of the TRP transmitter inconsistency parameters with the RSRP distribution information of DL-PRS beams at some known positions acquired in the last step, and the beam residual angle deviation of the second beam space distribution information can be obtained. Based on the beam residual angle deviation, the second beam spatial distribution information can be further calibrated to obtain more accurate third beam spatial distribution information and accurate beam angle information.

And finally, the LMF can acquire accurate AoD angle information of the terminal position based on the third beam space distribution information and by combining the RSRP measurement value reported by the terminal.

Based on any of the above embodiments, when the positioning end is a terminal, the method for determining the downlink departure angle includes:

firstly, a network side sends a forming parameter of analog beam forming of a TRP transmitter to a terminal.

After receiving the forming parameters of the analog beam forming, the terminal can construct an analog beam forming matrix based on the forming parameters of the analog beam forming.

In addition, the network side also sends the digital beam forming parameters of the TRP transmitter to the terminal.

After receiving the digital beam forming parameters, the terminal can combine the digital beam forming parameters and the analog beam forming matrix to establish a beam forming matrix W.

And the network side also sends the antenna parameters of the TRP transmitter to the terminal.

After receiving the antenna parameters, the terminal may calculate a steering matrix F of the antenna array based on the antenna parameters. On the basis, the terminal combines the beam forming matrix W and the steering matrix F of the antenna array to obtain the first beam space distribution information in an ideal state.

Particularly, the network side needs to acquire a difference parameter and send the difference parameter to the terminal, where the difference parameter includes gain delay information of each RF channel, delay information from each RF channel to each antenna element, which can be acquired based on the calibration circuit, and gain information of each antenna element, which is provided by a manufacturer or measured in advance.

The terminal can obtain the difference between the gains of the real RF channels according to the received difference parameters, the delay difference of the transmission signals reaching each antenna element, and the gain difference of each antenna element. Based on this, the terminal can calculate a gain correction factor for each antenna element and a delay correction factor for each antenna element, and construct a correction matrix C therefrom.

Subsequently, the terminal may correct the first beam spatial distribution information in an ideal state through the correction matrix C, so as to obtain second beam spatial distribution information in a theoretical state. The influence of the difference parameter of the TRP transmitter is fully considered in the step, and the accuracy of the beam distribution information can be effectively improved.

In addition, the reference terminal can be placed at different positions of the coverage area of the DL-PRS beam to measure RSRP, and the coordinates of each receiving position and the corresponding RSRP measurement value are forwarded to the terminal through the network side or the LMF, so that the terminal obtains the RSRP of the DL-PRS beam at some known positions.

On the basis, the terminal compares second beam space distribution information containing the influence of the TRP transmitter inconsistency parameters with RSRP distribution information of DL-PRS beams at some known positions acquired in the last step, and beam residual angle deviation of the second beam space distribution information can be obtained. Based on the beam residual angle deviation, the second beam spatial distribution information can be further calibrated to obtain more accurate third beam spatial distribution information and accurate beam angle information.

And finally, the terminal can acquire accurate AoD angle information of the position of the terminal by combining the RSRP measured value measured by the terminal based on the third beam space distribution information.

Fig. 3 is a schematic structural diagram of a network side provided in the present application, and as shown in fig. 3, the network side includes a memory 320, a transceiver 300, a processor 310:

a memory 320 for storing a computer program; a transceiver 300 for transceiving data under the control of the processor; a processor 310 for reading the computer program in the memory and performing the following operations:

Wherein in fig. 3, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 310, and various circuits, represented by memory 320, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 300 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over transmission media including wireless channels, wired channels, fiber optic cables, and the like.

The processor 310 is responsible for managing the bus architecture and general processing, and the memory 320 may store data used by the processor 310 in performing operations.

Alternatively, the processor 310 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a CPLD (Complex Programmable Logic Device), and the processor may also adopt a multi-core architecture.

The processor is used for executing any one of the methods provided by the embodiment of the application according to the obtained executable instructions by calling the computer program stored in the memory. The processor and memory may also be physically separated.

Optionally, when the network side is a serving base station and the location end is a terminal, the sending the beamforming parameter, the antenna parameter, and the difference parameter to the location end includes:

or sending the beamforming parameter, the antenna parameter and the difference parameter to a location management function unit (LMF), and sending the beamforming parameter, the antenna parameter and the difference parameter to the terminal by the LMF based on an LTE (Long term evolution) location protocol (LPP) signaling.

Optionally, when the network side is a non-serving base station and the location end is a terminal, the sending the beamforming parameter, the antenna parameter, and the difference parameter to the location end includes:

or, the beamforming parameter, the antenna parameter, and the diversity parameter are sent to a location management function unit LMF, and the LMF forwards the beamforming parameter, the antenna parameter, and the diversity parameter to the terminal based on LTE positioning protocol LPP signaling.

Optionally, when the location end is a location management function unit LMF, the sending the beamforming parameter, the antenna parameter, and the difference parameter to the location end includes:

Optionally, the diversity parameter includes at least one of gain delay information of each RF channel corresponding to the TRP, delay information from each RF channel to each antenna element, and gain information of each antenna element.

It should be noted that, the network side provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is the network side, and can achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are not repeated herein.

Fig. 4 is a schematic structural diagram of a positioning end provided in the present application, and as shown in fig. 4, the positioning end includes a memory 420, a transceiver 400, and a processor 410:

a memory 420 for storing a computer program; a transceiver 400 for transceiving data under the control of the processor 410; a processor 410 for reading the computer program in the memory 420 and performing the following operations:

receiving a beam forming parameter and an antenna parameter used by a transmitting and receiving point TRP for transmitting each downlink positioning reference signal DL-PRS, and a difference parameter of the TRP, wherein the difference parameter comprises a parameter which is different in amplitude and phase of each antenna element transmitting channel corresponding to the TRP;

And in particular transceiver 400, for receiving and transmitting data under the control of processor 410.

Where in fig. 4, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 410 and various circuits of memory represented by memory 420 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 400 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over transmission media including wireless channels, wired channels, fiber optic cables, and the like. For different user devices, the user interface 430 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 410 is responsible for managing the bus architecture and general processing, and the memory 420 may store data used by the processor 410 in performing operations.

Alternatively, the processor 410 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a CPLD (Complex Programmable Logic Device), and the processor may also have a multi-core architecture.

The processor is used for executing any method provided by the embodiment of the application according to the obtained executable instructions by calling the computer program stored in the memory. The processor and memory may also be physically separated.

Optionally, the determining a downlink departure angle based on the beamforming parameter, the antenna parameter, and the difference parameter includes:

Optionally, the determining first beam spatial distribution information of the DL-PRS based on the beamforming parameter and the antenna parameter includes:

determining a beamforming matrix based on the beamforming parameters;

determining an antenna array steering matrix based on the antenna parameters;

Optionally, the correcting the first beam spatial distribution information based on the difference parameter to obtain second beam spatial distribution information includes:

constructing a correction matrix based on the difference parameters;

Optionally, the determining the downlink departure angle based on the second beam spatial distribution information includes:

Optionally, the correcting the second beam spatial distribution information based on the reference signal received power RSRP distribution information of the DL-PRS to obtain third beam spatial distribution information includes:

Optionally, when the positioning end is a positioning management function unit LMF, the correcting the second beam spatial distribution information based on the reference signal received power RSRP distribution information of the DL-PRS to obtain a third beam spatial distribution information, before further including:

Optionally, when the positioning end is a terminal, the second beam space distribution information is corrected based on the reference signal received power RSRP distribution information of the DL-PRS to obtain a third beam space distribution information, and the method before includes:

Optionally, when the positioning end is a positioning management function unit LMF, the receiving and transmitting point TRP transmits a beamforming parameter and an antenna parameter used by each downlink positioning reference signal DL-PRS, and a difference parameter of the TRP includes:

Optionally, when the positioning end is a terminal, the receiving and transmitting point TRP transmits a beamforming parameter and an antenna parameter used by each downlink positioning reference signal DL-PRS, and a difference parameter of the TRP includes:

receiving the beamforming parameter, the antenna parameter and the difference parameter sent by a serving base station based on at least one of Radio Resource Control (RRC) signaling, media access control (MAC-CE) signaling and Downlink Control Information (DCI) signaling, wherein the beamforming parameter, the antenna parameter and the difference parameter are sent to the serving base station after the serving base station determines or a non-serving base station determines;

Optionally, the diversity parameter includes at least one of gain delay information of each radio frequency RF channel in the corresponding TRP, delay information of each RF channel to each antenna element, and gain information of each antenna element.

It should be noted that, the positioning end provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution main body is the positioning end, and can achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are not repeated herein.

Fig. 5 is a schematic structural diagram of a downlink departure angle determining apparatus provided in the present application, and as shown in fig. 5, the apparatus includes:

a data determining unit 510, configured to determine a beamforming parameter and an antenna parameter used by a transmitting/receiving point TRP to transmit each downlink positioning reference signal DL-PRS, and a difference parameter of the TRP, where the difference parameter includes a parameter that differs between an amplitude and a phase of each antenna element transmission path corresponding to the TRP;

a data sending unit 520, configured to send the beamforming parameter, the antenna parameter, and the difference parameter to a positioning end, so that the positioning end determines a downlink departure angle based on the beamforming parameter, the antenna parameter, and the difference parameter.

Optionally, when the network side is a serving base station and the positioning end is a terminal, the data sending unit 520 is configured to:

based on at least one of Radio Resource Control (RRC) signaling, media access control (MAC-CE) signaling and Downlink Control Information (DCI) signaling, sending the beamforming parameters, the antenna parameters and the difference parameters to the terminal;

Optionally, when the network side is a non-serving base station and the positioning end is a terminal, the data sending unit 520 is configured to:

Optionally, when the location end is a location management function unit LMF, the data sending unit 520 is configured to:

Specifically, the downlink departure angle determining apparatus provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is a network side, and can achieve the same technical effect, and details of the same parts and beneficial effects as those of the method embodiment in this embodiment are not described herein again.

Fig. 6 is a second schematic structural diagram of a downlink departure angle determining apparatus provided in the present application, and as shown in fig. 6, the apparatus includes:

a data receiving unit 610, configured to receive a beamforming parameter and an antenna parameter used by a transmitting/receiving point TRP to transmit each downlink positioning reference signal DL-PRS, and a difference parameter of the TRP, where the difference parameter includes a parameter that differs between an amplitude and a phase of each antenna element transmission path corresponding to the TRP;

a departure angle determining unit 620, configured to determine a downlink departure angle based on the beamforming parameter, the antenna parameter, and the difference parameter.

Optionally, the departure angle determination unit 620 includes:

a first distribution constructing subunit, configured to determine first beam spatial distribution information of the DL-PRS based on the beamforming parameter and the antenna parameter;

a difference syndrome unit, configured to correct the first beam spatial distribution information based on the difference parameter to obtain second beam spatial distribution information;

a departure angle determining subunit, configured to determine the downlink departure angle based on the second beam spatial distribution information.

Optionally, the first distribution building subunit is configured to:

determining a beamforming matrix based on the beamforming parameters;

determining an antenna array steering matrix based on the antenna parameters;

Optionally, the differential syndrome unit is configured to:

constructing a correction matrix based on the difference parameters;

Optionally, the departure angle determining subunit is configured to:

Optionally, when the positioning end is a positioning management function unit LMF, the departure angle determining subunit is further configured to:

and determining the RSRP distribution information based on the RSRP and the receiving position of the DL-PRS and the antenna position of TRP corresponding to the DL-PRS.

Optionally, when the positioning end is a terminal, the departure angle determining subunit is further configured to:

Optionally, when the location end is a location management function unit LMF, the data receiving unit 610 is configured to:

Optionally, when the location end is a terminal, the data receiving unit 610 is configured to:

Specifically, the downlink departure angle determining apparatus provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is the location end, and can achieve the same technical effect, and details of the same parts and beneficial effects as those of the method embodiment in this embodiment are not described herein again.

It should be noted that, in the foregoing embodiments of the present application, the division of the units/modules is schematic, and is only a logic function division, and another division manner may be used in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solutions of the present application, which are essential or contributing to the prior art, or all or part of the technical solutions may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Optionally, an embodiment of the present application further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, where the computer program is configured to cause the processor to execute the method provided in each of the foregoing embodiments, and the method includes:

sending the beam forming parameters, the antenna parameters and the difference parameters to a positioning end, so that the positioning end determines a downlink departure angle based on the beam forming parameters, the antenna parameters and the difference parameters;

or comprises the following steps:

It should be noted that: the processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid State Disks (SSDs)), etc.

In addition, it should be noted that: the technical scheme provided by the embodiment of the application can be suitable for various systems, particularly 5G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a long term evolution (long term evolution, LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, an LTE-a (long term evolution) system, a universal mobile system (universal mobile telecommunications system, UMTS), a universal internet Access (WiMAX) system, a New Radio Network (NR) system, etc. These various systems include a location-side device and a network device. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5 GS), and the like.

The positioning end device related to the embodiment of the present application may refer to a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem. In different systems, the names of the positioning end devices may be different, for example, in a 5G system, the positioning end device may be referred to as a User Equipment (UE). The wireless location end device may communicate with one or more Core Networks (CN) via a Radio Access Network (RAN), and the wireless location end device may be a mobile location end device, such as a mobile phone (or called "cellular" phone) and a computer having a mobile location end device, for example, a mobile device which may be portable, pocket-sized, handheld, built-in computer or vehicle-mounted, and exchanges languages and/or data with the Radio Access Network. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). The wireless location end device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (access point), a remote location end device (remote terminal), an access location end device (access terminal), a user location end device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in this embodiment of the present application.

The network side related to the embodiment of the present application may be a base station, and the base station may include a plurality of cells for providing services for a positioning end. A base station may also be referred to as an access point or a device in an access network that communicates over the air-interface, through one or more sectors, with a wireless location end device, or by other names, depending on the particular application. The network side may be configured to exchange the received air frame with an Internet Protocol (IP) packet as a router between the wireless location end device and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) communication network. The network side may also coordinate attribute management for the air interface. For example, the network side according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), may be a network side (NodeB) in a Wideband Code Division Multiple Access (WCDMA), may be an evolved Node B (eNB or e-NodeB) in a Long Term Evolution (LTE) System, may be a 5G Base Station (gNB) in a 5G network architecture (next generation System), may be a Home evolved Node B (HeNB), a relay Node (relay Node), a Home Base Station (femto), a pico Base Station (pico), and the like, and is not limited in the embodiments of the present application. In some network structures, the network side may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, and the centralized unit and the distributed unit may be geographically separated.

Multiple Input Multiple Output (MIMO) transmission may be performed between the network side and the positioning end device by using one or more antennas, where the MIMO transmission may be Single User MIMO (SU-MIMO) or Multi-User MIMO (MU-MIMO). According to the form and the number of the root antenna combination, the MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, and can also be diversity transmission, precoding transmission, beamforming transmission, etc.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A downlink departure angle determination method is applied to a network side, and the method comprises the following steps:

2. The method according to claim 1, wherein when the network side is a serving base station and the location end is a terminal, the sending the beamforming parameter, the antenna parameter, and the difference parameter to the location end comprises:

3. The method according to claim 1, wherein when the network side is a non-serving base station and the location end is a terminal, the sending the beamforming parameter, the antenna parameter, and the difference parameter to the location end includes:

transmitting the beamforming parameter, the antenna parameter and the difference parameter to a serving base station, and forwarding, by the serving base station, the beamforming parameter, the antenna parameter and the difference parameter to the terminal based on at least one of Radio Resource Control (RRC) signaling, media Access Control (MAC) -CE signaling and Downlink Control Information (DCI) signaling;

4. The method according to claim 1, wherein when the location end is a location management function unit LMF, the sending the beamforming parameter, the antenna parameter, and the difference parameter to the location end includes:

5. The method according to any one of claims 1 to 4, wherein the diversity parameter includes at least one of gain delay information of each RF channel corresponding to TRP, delay information of each RF channel to each antenna element, and gain information of each antenna element.

6. A downlink departure angle determination method is applied to a positioning end, and comprises the following steps:

7. The method according to claim 6, wherein the determining a downlink departure angle based on the beamforming parameter, the antenna parameter, and the difference parameter includes:

8. The method of claim 7, wherein the determining the first beam spatial distribution information of the DL-PRS based on the beam forming parameter and the antenna parameter includes:

determining a beamforming matrix based on the beamforming parameters;

determining an antenna array steering matrix based on the antenna parameters;

9. The method according to claim 7, wherein the correcting the first beam spatial distribution information based on the difference parameter to obtain a second beam spatial distribution information includes:

constructing a correction matrix based on the difference parameters;

10. The method according to claim 7, wherein the determining the downlink departure angle based on the second beam spatial distribution information includes:

11. The method of determining a downlink departure angle according to claim 10, wherein the correcting the second beam spatial distribution information based on the reference signal received power RSRP distribution information of the DL-PRS to obtain a third beam spatial distribution information includes:

determining a beam residual angle deviation of the second beam spatial distribution information based on the RSRP distribution information and the second beam spatial distribution information;

and correcting the second beam spatial distribution information based on the beam residual angle deviation to obtain the third beam spatial distribution information.

12. The method according to claim 10, wherein when the positioning end is a positioning management function unit LMF, the method corrects the second beam spatial distribution information based on RSRP distribution information of the DL-PRS to obtain a third beam spatial distribution information, and before the method further includes:

13. The method according to claim 10, wherein when the positioning end is a terminal, the method corrects the second beam spatial distribution information based on RSRP distribution information of DL-PRS to obtain a third beam spatial distribution information, and before the method further includes:

14. The method according to any one of claims 6 to 13, wherein when the positioning terminal is a positioning management function unit LMF, the receiving and transmitting point TRP transmits a beamforming parameter and an antenna parameter used by each downlink positioning reference signal DL-PRS, and the difference parameter of the TRP includes:

15. The method according to any one of claims 6 to 13, wherein when the positioning end is a terminal, the receiving and transmitting point TRP transmits beamforming parameters and antenna parameters used by each downlink positioning reference signal DL-PRS, and difference parameters of the TRP, including:

or, receiving the beamforming parameter, the antenna parameter, and the difference parameter forwarded by the LMF based on the LTE positioning protocol LPP signaling, where the beamforming parameter, the antenna parameter, and the difference parameter are sent by the base station to the LMF.

16. The method according to any one of claims 6 to 13, wherein the diversity parameter includes at least one of gain delay information of each RF channel corresponding to the TRP, delay information of each RF channel to each antenna element, and gain information of each antenna element.

17. A network side comprising a memory, a transceiver, a processor:

18. The network side according to claim 17, wherein when the network side is a serving base station and the location end is a terminal, the sending the beamforming parameter, the antenna parameter and the difference parameter to the location end comprises:

19. The network side according to claim 17, wherein when the network side is a non-serving base station and the location end is a terminal, the sending the beamforming parameter, the antenna parameter and the difference parameter to the location end comprises:

20. The network side according to claim 17, wherein when the location end is a location management function unit LMF, the sending the beamforming parameter, the antenna parameter, and the difference parameter to the location end includes:

21. The network side of any of claims 17 to 20, wherein the diversity parameter comprises at least one of gain delay information for each RF channel of the TRP, delay information from each RF channel to each antenna element, and gain information for each antenna element.

22. A positioning terminal, comprising a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

23. The positioning end according to claim 22, wherein the determining a downlink departure angle based on the beamforming parameter, the antenna parameter, and the diversity parameter comprises:

24. The positioning end of claim 23, wherein the determining the first beam spatial distribution information of the DL-PRS based on the beamforming parameter and the antenna parameter comprises:

determining a beamforming matrix based on the beamforming parameters;

determining an antenna array steering matrix based on the antenna parameters;

25. The positioning terminal of claim 23, wherein the correcting the first beam spatial distribution information based on the difference parameter to obtain a second beam spatial distribution information comprises:

constructing a correction matrix based on the difference parameters;

26. The positioning end according to claim 23, wherein the determining the downlink departure angle based on the second beam spatial distribution information includes:

27. The positioning terminal of claim 26, wherein the correcting the second beam space distribution information based on the reference signal received power RSRP distribution information of the DL-PRS to obtain a third beam space distribution information comprises:

28. The positioning end of claim 26, wherein when the positioning end is a positioning management function unit LMF, the correcting the second beam spatial distribution information based on RSRP distribution information of the DL-PRS to obtain a third beam spatial distribution information further comprises:

29. The positioning terminal of claim 26, wherein when the positioning terminal is a terminal, the second beam spatial distribution information is corrected based on the reference signal received power RSRP distribution information of the DL-PRS to obtain a third beam spatial distribution information, and before the correcting, further comprising:

30. The positioning end according to any one of claims 22 to 29, wherein when the positioning end is a positioning management function unit LMF, the receiving and transmitting points TRP transmit beamforming parameters and antenna parameters used by each downlink positioning reference signal DL-PRS, and difference parameters of the TRP, including:

31. The positioning end according to any one of claims 22 to 29, wherein when the positioning end is a terminal, the receiving and transmitting points TRP transmit beamforming parameters and antenna parameters used by each downlink positioning reference signal DL-PRS, and difference parameters of the TRP, including:

32. The positioning terminal according to any of claims 22-29, wherein the diversity parameter comprises at least one of gain delay information for each RF channel of the TRP, delay information from each RF channel to each antenna element, and gain information for each antenna element.

33. A downlink departure angle determining apparatus, comprising:

34. A downlink departure angle determining apparatus, comprising:

a data receiving unit, configured to receive a beamforming parameter and an antenna parameter used by a transmitting and receiving point TRP to transmit each downlink positioning reference signal DL-PRS, and a diversity parameter of the TRP, where the diversity parameter includes a parameter that differs between an amplitude and a phase of each antenna element transmission path corresponding to the TRP;

a departure angle determining unit, configured to determine a downlink departure angle based on the beamforming parameter, the antenna parameter, and the difference parameter.

35. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing a processor to perform the method of any one of claims 1 to 16.