WO2020192353A1

WO2020192353A1 - Method and apparatus for selecting measurement cell

Info

Publication number: WO2020192353A1
Application number: PCT/CN2020/077042
Authority: WO
Inventors: 刘志斌
Original assignee: 华为技术有限公司
Priority date: 2019-03-22
Filing date: 2020-02-27
Publication date: 2020-10-01
Also published as: CN111726858B; CN111726858A

Abstract

Disclosed are a method and apparatus for selecting a measurement cell. A measurement cell relatively suitable for OTDOA positioning is selected to improve positioning accuracy. The method comprises: a positioning server acquiring a horizontal direction angle and a position of a first antenna, wherein the first antenna is an antenna of a serving cell of a terminal device; the positioning server determining a first direction according to the horizontal direction angle and the position of the first antenna, wherein the first direction is a direction from the position of the first antenna to the terminal device; and the positioning server selecting at least two measurement cells from at least two neighboring cells belonging to a first semi-plane, wherein the neighboring cell is a neighboring cell of the serving cell, the first semi-plane is a semi-plane obtained by dividing a first straight line, the first straight line is perpendicular to a straight line where the first direction is located, the first straight line passes through the position of the first antenna, and the first semi-plane comprises a ray, taking the position of the first antenna as an end point, emitted from the first direction.

Description

Method and device for selecting measurement cell

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on March 22, 2019, the application number is 201910220111.6, and the application name is "a method and device for selecting a measurement cell", the entire content of which is incorporated herein by reference Applying.

Technical field

This application relates to the field of mobile communication technology, and in particular to a method and device for selecting a measurement cell.

Background technique

Observed time difference of arrival (OTDOA) is a positioning method established by the 3rd generation partnership project (3GPP) protocol. The principle of OTDOA positioning is: the terminal device measures the reference signals from the serving cell and at least two neighboring cells to obtain the reference signal time difference measurement (RSTD) value, and reports the RSTD value to the positioning server, and the positioning The server uses a position calculation algorithm to determine the position of the terminal device according to the received RSTD value and the positions of the serving cell and at least two neighboring cells. Among them, for ease of description, both the serving cell and at least two neighboring cells used for terminal device positioning in this application may be referred to as measuring cells.

When implementing the OTDOA positioning method, a key factor affecting the accuracy of the OTDOA positioning is the selection of the measurement cell. Among them, the serving cell of the terminal equipment is usually regarded as a fixed measurement cell, and the implementation of the OTDOA positioning method requires at least three measurement cells. Therefore, a key factor affecting the accuracy of OTDOA positioning is how to choose two measurements other than the serving cell Community. In the prior art, the positioning server randomly selects at least two neighboring cells as measurement cells among the neighboring cells of the serving cell of the terminal device. In this way, the probability of selecting a measurement cell suitable for OTDOA positioning of the terminal device is very small, and the positioning accuracy is low. . How to select a more suitable measurement cell for OTDOA positioning to improve positioning accuracy is a technical problem that needs to be resolved.

Summary of the invention

The embodiment of the present application provides a method and device for selecting a measurement cell, and selecting a more suitable measurement cell for OTDOA positioning to improve positioning accuracy.

In the first aspect, the embodiments of the present application provide a method for selecting a measurement cell. The method can be applied to a positioning server, and can also be applied to a structure or device provided in the positioning server, such as a chip, a chip system, or a circuit system. Taking the method applied to a positioning server as an example, the method includes: the positioning server obtains the horizontal direction angle and position of the first antenna, the first antenna is the antenna of the serving cell of the terminal device, and the positioning server according to the level of the first antenna The direction angle and the position determine the first direction, the first direction is the direction from the position of the first antenna to the terminal device, and the positioning server selects at least two measurement cells from at least two neighboring cells belonging to the first half plane.

Wherein, the neighboring cell is the neighboring cell of the serving cell, the first half plane is the half plane obtained by dividing the first straight line, the first straight line is perpendicular to the straight line in the first direction, and the first straight line passes through the position of the first antenna. The first half plane includes the rays emitted in the first direction with the position of the first antenna as the end point.

Through the above method, the measurement cell can be selected from the neighboring cells included in the half plane where the terminal device is located. The measurement cell selected by this method is in the direction from the serving cell to the terminal device, so that the terminal device is more likely to be in the selected measurement The geometric center of the cell and the serving cell can be known from the principle of geometric diffusion precision (GDOP), and the measurement cell selected in this way can make the positioning accuracy higher.

In a possible design, the positioning server can obtain the horizontal direction angle and position of the first antenna in any of the following two ways:

Manner 1: The positioning server receives the horizontal direction angle and position of the first antenna from the network device. The network device may be a network device that provides services for terminal devices.

Manner 2: The positioning server obtains the horizontal direction angle and position of the first antenna locally.

Through the above method, the positioning server can flexibly adopt the above-mentioned method 1 and method 2 to obtain the horizontal direction angle and position of the first antenna.

In a possible design, the positioning server determines the first direction according to the horizontal direction angle and position of the first antenna, including: the positioning server determines the beam direction of the serving cell according to the horizontal direction angle and position of the first antenna, and sets the beam direction Determined as the first direction.

In a possible design, the positioning server selects at least two measurement cells among at least two neighboring cells belonging to the first half plane, including: the positioning server determines the first position of the terminal device in the first direction, and determines at least two The beam directions of each neighboring cell included in each neighboring cell, and then at least two beam directions pointing to the first position may be selected from the beam directions of each neighboring cell included in the at least two neighboring cells, and the at least two The neighboring cells respectively corresponding to the beam directions pointing to the first position are used as measurement cells.

Through the above method, the measurement cell with the smallest GDOP can be selected for the implementation of the OTDOA positioning method, that is, the terminal device can be located close to the geometric center of the geometric shape formed by the measurement cell selected by this method, that is, the terminal device can be placed in a relatively high position. The best measurement position can improve the positioning accuracy.

In a possible design, the positioning server determining the beam direction of each neighboring cell included in the at least two neighboring cells includes: the positioning server acquiring the horizontal direction angle of each second antenna included in the at least two second antennas and Position, the second antenna is an antenna of an adjacent cell, and the beam direction of each adjacent cell is determined according to the horizontal direction angle and position of each second antenna included in the at least two second antennas.

In a possible design, the positioning server determining the first position of the terminal device in the first direction includes: the positioning server determining the first distance between the terminal device and the first antenna, and dividing the distance between the terminal device and the first antenna in the first direction The position whose position is the first distance is determined as the first position.

In a possible design, the positioning server may determine the first distance between the terminal device and the first antenna in any of the following three ways:

Manner 1: The positioning server obtains a first distance, and the positioning server determines half of the first distance as the first distance.

The first distance refers to the distance between the serving cell and the neighboring cell or each neighboring cell, and the first distance involved in the embodiments of the present application all refers to this meaning.

Manner 2: The positioning server obtains a plurality of first distances, and the positioning server determines an average value of a half of each of the plurality of first distances as the first distance.

Manner 3: The positioning server determines the first distance according to the signal strength of the terminal device to the serving cell.

Through the foregoing method, the positioning server can flexibly use the foregoing Manner 1 or Manner 2 or Manner 3 to determine the first distance between the terminal device and the first antenna.

In the second aspect, an embodiment of the present application provides an apparatus for selecting a measurement cell, including a unit or means for performing each step of the first aspect above.

In a third aspect, an embodiment of the present application provides an apparatus for selecting a measurement cell, including at least one processor and a memory, the memory stores a computer program, and the at least one processor is configured to invoke the computer program to execute the above first aspect Provided method.

In a fourth aspect, embodiments of the present application provide a chip or chip system, which may be coupled to a memory or include a memory, and the chip or chip system is used to call a computer program stored in the memory to implement the above-mentioned first aspect And any one of the possible designs in the first aspect. The chip system includes at least one chip, and may also include other discrete devices.

In a fifth aspect, an embodiment of the present application provides a computer storage medium on which a computer program is stored, and when the computer program is executed by a processor, it can implement the first aspect and any one of the possible designs of the first aspect.

In a sixth aspect, the embodiments of the present application provide a computer program product. When the computer program product is run by a computer, the computer can enable the computer to implement the first aspect and any one of the possible designs in the first aspect.

Description of the drawings

FIG. 1 is a schematic diagram of a network architecture applicable to the embodiments of this application;

Figure 2 is a schematic diagram of OTDOA positioning provided by an embodiment of the application;

FIG. 3 is a schematic diagram of information interaction in OTDOA positioning according to an embodiment of the application;

Figure 4a is a schematic diagram of a GDOP in a three base station scenario provided by an embodiment of the application;

FIG. 4b is a schematic diagram of a GDOP in a five base station scenario provided by an embodiment of the application;

Fig. 5 is a flowchart of a method for selecting a measurement cell provided by an embodiment of the application;

FIG. 6 is a schematic diagram of another network architecture provided by an embodiment of this application;

FIG. 7 is a schematic diagram of another network architecture provided by an embodiment of this application;

FIG. 8 is a flowchart of another method for selecting a measurement cell provided by an embodiment of this application;

FIG. 9 is a flowchart of another method for selecting a measurement cell according to an embodiment of the application;

FIG. 10 is a schematic structural diagram of an apparatus for selecting a measurement cell according to an embodiment of this application;

FIG. 11 is a schematic structural diagram of another apparatus for selecting a measurement cell provided by an embodiment of this application.

detailed description

The application will be described in detail below in conjunction with the drawings in the specification.

Please refer to FIG. 1, which is a schematic diagram of a network architecture applicable to the embodiments of this application. The network architecture shown in FIG. 1 includes multiple RANs 110, a positioning server 120, and a terminal device 130. The positioning server 120 can be used to locate the terminal device 130, and the RAN 110 can be used to provide services for the terminal device 130. Specifically, the RAN 110 may provide positioning services for the terminal equipment 130 in the cell 1 or cell 2 or cell 3 covered by the RAN 110. In this application, the cell serving the terminal equipment 130 is called a serving cell. It should be understood that the network architecture shown in FIG. 1 only includes one terminal device as an example for description, but the embodiment of the present application is not limited to this. For example, the network architecture may also include more terminal devices; similarly, the network The architecture can also include more RANs and positioning servers, and can also include other devices. It should be noted that, in FIG. 1, one RAN device corresponding to three cells is taken as an example, which is not meant to be a limitation. For example, in some possible network architectures, one RAN device may also correspond to one cell. No matter how many cells a RAN device corresponds to, the method provided in this application is applicable.

Hereinafter, some terms in this application will be explained to facilitate the understanding of those skilled in the art.

1) OTDOA is a positioning method established by the 3GPP protocol. The principle of OTDOA positioning is: the terminal equipment detects the arrival time difference of the signals of at least three cells (usually including the serving cell of the terminal equipment). The measurement quantity may be RSTD, for example, after the terminal equipment measures the arrival time difference of the signals of at least three cells , Sending the arrival time difference of the signals of at least three cells to the positioning server, and then the positioning server uses the location calculation algorithm to determine the location of the terminal device according to the arrival time difference of the signals of the at least three cells and the locations of the at least three cells. In this application, for the convenience of description, the cell used for OTDOA positioning of the terminal device is referred to as a measurement cell. This application uses terminal equipment to detect the signal arrival time difference of three measurement cells as an example to describe the OTDOA positioning method. As shown in Figure 2, it is assumed that a base station corresponds to a measurement cell, and the coordinates of the terminal equipment are (x, y), and three The position coordinates of the antenna in the i-th measurement cell in the measurement cell are (x _i , y _i ), i=1, 2, 3, and the time difference observed by the terminal equipment is τ _1,2 , τ _2,3 , τ _{1, respectively 3} , then solve the equations:

The coordinates (x, y) of the terminal device can be obtained.

Refer to Figure 3, which is a schematic diagram of information interaction between the positioning server, base station, and terminal equipment when OTDOA is used for positioning. When performing OTDOA positioning, the positioning server usually takes the serving cell of the terminal device as one of the measurement cells, and randomly selects at least two neighboring cells from the neighboring cells of the serving cell as other measurement cells, and the positioning server selects at least three measurement cells After the cell, the terminal device may be notified of the information of the at least three measurement cells, for example, the terminal device may be notified of the identification of the at least three measurement cells and the configuration information of the measurement cell positioning reference signal. After receiving the information of at least three measurement cells notified by the positioning server, the terminal device can then measure the positioning reference signals sent by the at least three measurement cells to obtain positioning measurement information. For example, the positioning measurement information may include the positioning of at least three measurement cells. The arrival time difference of the reference signal, and report the positioning measurement information to the positioning server. In addition, the positioning server may also request relevant information of at least three measurement cells, for example requesting antenna positions of at least three measurement cells, and the serving base stations of the at least three measurement cells report relevant information of the at least three measurement cells to the positioning server. The location server may determine the location of the terminal device by using a location calculation algorithm based on the location measurement information reported by the terminal device and the cell-related information reported by the serving base station of each measurement cell.

2) GDOP is a very important coefficient to measure positioning accuracy. It represents the distance vector amplification factor between the receiver and the space satellite caused by the global positioning system (GPS) ranging error. The volume of the body outlined by the unit vector from the receiver to the space satellite is inversely proportional to GDOP, so it is also called the geometric precision factor.

Among them, a key factor affecting the positioning accuracy of OTDOA is the geometric shape of the measurement cell, that is, how to select the measurement cell is a key factor affecting the positioning accuracy of the OTDOA. GDOP is a parameter that indicates that geometry affects accuracy. The closer the terminal device is to the geometric center of the geometric shape formed by the measurement cell, the smaller the GDOP, and the higher the positioning accuracy. Conversely, the more the terminal device deviates from the geometric center of the geometric shape formed by the measurement cell, the larger the GDOP, the lower the positioning accuracy.

Referring to Figure 4a, Figure 4a is a schematic diagram of GDOP at different positions of a geometric shape composed of 3 base stations in a scenario of 3 base stations. As can be seen from Figure 4a, the geometric shape composed of 3 base stations is located in the geometric The GDOP at the center position is the smallest (less than 1.4), and the more it deviates from the geometric center, the greater the GDOP value, that is, the closer the terminal device is to the geometric center formed by the selected measurement cell, the smaller the GDOP, the higher the positioning accuracy. Conversely, the more deviated the position of the terminal device is, the greater the geometric center of the selected measurement cell, the greater the GDOP, the lower the positioning accuracy.

Referring to Figure 4b, Figure 4b is a schematic diagram of GDOP at different positions of a geometric shape composed of 5 base stations in a scenario of 5 base stations. As can be seen from Figure 4b, the geometric shape composed of 5 base stations is located in the geometric shape The GDOP at the center is the smallest (less than 0.9), and the more deviated from the geometric center, the greater the GDOP value.

3) Terminal devices, including devices that provide users with voice and/or data connectivity, such as handheld devices with wireless connection functions, or processing devices connected to wireless modems. The terminal device can communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN. The terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), mobile station (mobile), remote Station (remote station), access point (access point, AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), or user Equipment (user device), etc. For example, it may include mobile phones (or "cellular" phones), computers with mobile terminal equipment, portable, pocket-sized, handheld, computer-built or vehicle-mounted mobile devices, smart wearable devices, and so on. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (personal digital assistants, etc.) PDA), and other equipment. It also includes restricted devices, such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.

As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

4) A network device, for example, including a base station (for example, an access point), may refer to a device that communicates with a wireless terminal device through one or more cells on an air interface in an access network. The network device can be used to convert received air frames and Internet Protocol (IP) packets to each other, and act as a router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network. The network equipment can also coordinate the attribute management of the air interface. For example, the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or It can also include the next generation node B (gNB) in the fifth generation (5G) new radio (NR) system or the cloud access network (CloudRAN) system Centralized unit (CU) and distributed unit (DU) in, the embodiment of this application is not limited.

5) Positioning server, in this application, refers to a device or network element that can position a terminal device according to a position calculation algorithm. For example, it can be a computer device, a server (server), a cloud service platform, an evolved service mobile location center (E-SMLC), a service location protocol (service location protocol, SLP) network element, or a local management function ( The location management function (LMF) network element, etc., the computer device may include, for example, a desktop computer, a tablet computer, and a vehicle-mounted computer.

6) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "Multiple" refers to two or more. In view of this, "multiple" may also be understood as "at least two" in the embodiments of the present application. "At least one" can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and does not limit which ones are included. For example, including at least one of A, B and C, then the included can be A, B, C, A and B, A and C, B and C, A and B and C. "At least two" can be understood as two or more. In the same way, the understanding of "at least one" and other descriptions is similar. "And/or" describes the association relationship of the associated object, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, or B exists alone. In addition, the character "/", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

And, unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or order of multiple objects. Importance. For example, "first antenna" and "second antenna" are only used to distinguish between multiple antennas, and are not used to limit the order, timing, priority, or importance of multiple antennas.

With the rapid development of the Internet of Things (IoT), it is estimated that by 2020, the number of global cellular IoT connections will reach 3 billion, and the tracking connections in the Internet of Things will correspondingly grow rapidly. It is expected that by 2024, the IoT tracking category The number of connections will reach 140 million. In order to reduce the cost of IoT terminal devices, most IoT terminal devices will not support GPS positioning. For such IoT terminal devices that do not support GPS positioning, or terminal devices in an environment without GPS signals, GPS positioning cannot be used, and GPS positioning is required. The OTDOA positioning method based on the cellular mobile network established by the 3GPP standard performs positioning. Taking the terminal device in the network architecture shown in FIG. 1 as an IoT terminal device or a terminal device in an environment without GPS signals as an example, based on the network architecture shown in FIG. 1, the positioning server 120 can use the OTDOA positioning method to perform the terminal device 130 performs positioning. When performing this positioning method, it is necessary to select at least three measurement cells from the cells of each RAN110. Usually, the serving cell of the terminal device 130 is used as one of the measurement cells, and the cells other than the serving cell are selected At least two measurement cells, using the existing method, the positioning server 120 can randomly select at least two neighboring cells as other measurement cells among the neighboring cells of the serving cell of the terminal device 130, so that the selection is suitable for OTDOA positioning of the terminal device 130 The probability of measuring the cell is very small, and the positioning accuracy is low.

In view of this, the embodiments of the present application provide a method and device for selecting a measurement cell, and a more suitable measurement cell for OTDOA positioning can be selected to improve positioning accuracy. Among them, the method and the device are based on the same technical concept, and because the method and the device have similar principles for solving the problem, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

It should be noted that the method for selecting a measurement cell provided in the embodiment of the present application can be, but is not limited to, applied to the network architecture shown in FIG. 1. For example, it can also be applied to an LTE network architecture, a wideband code division multiple access (WCDMA) network architecture or a LORA network architecture.

Please refer to FIG. 5, which is a flowchart of a method for selecting a measurement cell provided by this application. As shown in Figure 5, the method includes the following steps:

Step 101: The positioning server obtains the horizontal direction angle and position of the first antenna, which is the antenna in the serving cell of the terminal device.

When the method for selecting a measurement cell provided in the embodiment of the application is applied to the network architecture shown in FIG. 1, the positioning server in the embodiment of the application may be the positioning server 120 in FIG. 1, and the terminal device in the embodiment of the application It may be the terminal device 130 in FIG. 1, and correspondingly, the serving cell of the terminal device may be the serving cell where the terminal device 130 in FIG. 1 is located.

The number and type of first antennas are not limited in the embodiments of the present application.

In the embodiment of the present application, the positioning server may obtain the horizontal direction angle and position of the first antenna in but not limited to the following manners.

Manner 1: The positioning server can receive the horizontal direction angle and position of the first antenna from the network device, which is a network device that provides services for terminal devices. Wherein, if the method for selecting a measurement cell provided in the embodiment of the present application is applied to the network architecture shown in FIG. 1, the network device in the first approach may be the RAN 110 including the serving cell in FIG. 1.

Manner 2: The positioning server can obtain the horizontal direction angle and position of the first antenna locally. In the second manner, the horizontal direction angle and position of the first antenna obtained locally by the positioning server may be obtained in advance from a network device that provides services for the terminal device.

It should be noted that before the method of this application is executed, the positioning server or terminal device may trigger a positioning request to request the terminal device to locate. After the positioning server or terminal device triggers the positioning request, the positioning server and the terminal device may further Perform capability negotiation and positioning method selection. For example, the positioning server and the terminal device can select the OTDOA positioning method to locate the terminal device through negotiation.

Step 102: The positioning server determines a first direction according to the horizontal direction angle and position of the first antenna, where the first direction is a direction from the position of the first antenna to the terminal device.

Exemplarily, the positioning server may determine the beam direction of the serving cell according to the horizontal direction angle and position of the first antenna, and determine the beam direction as the first direction. For example, if the method for selecting a measurement cell provided in the embodiment of the present application is applied to the network architecture shown in FIG. 1, the first direction may be the first direction shown in FIG. 6.

Step 103: The positioning server selects at least two measurement cells among at least two neighboring cells belonging to the first half plane.

Referring to FIG. 7, taking the method for selecting a measurement cell provided in the embodiment of the present application to the network architecture shown in FIG. 1 as an example, the first half plane in this application may be the first half plane shown in FIG. 7 , The first straight line in this application may be the first straight line shown in FIG. 7, and the first straight line shown in FIG. 7 is perpendicular to the line in which the first direction is located. Select at least two measurement cells from at least two neighboring cells belonging to the first half plane shown in FIG. 7, for example, it may be in the cell 1, cell 2, and cell 3 respectively included in the two RANs 110 belonging to the first half plane Select at least two measurement cells. In this way, neighboring cells that do not belong to the first half-plane can be filtered out. As shown in Figure 7, neighboring cells below the serving cell can be filtered out. Using this method, the neighboring cells included in the half-plane where the terminal device 130 is located can be filtered out. The measurement cell selected by this method is in the direction from the serving cell to the terminal device 130, so that the terminal device 130 is more likely to be in the geometric center of the selected measurement cell and the serving cell, which can be known from the GDOP principle. The selected measurement cell can make the positioning accuracy higher.

In a possible example, the positioning server may select at least two measurement cells among at least two neighboring cells belonging to the first half plane in the following manner: the positioning server determines the first position of the terminal device in the first direction, and determines at least The beam directions of each neighboring cell included in the two neighboring cells, from the beam directions of each neighboring cell included in the at least two neighboring cells, at least two beam directions pointing to the first position are selected, and the at least two The neighboring cells respectively corresponding to the beam directions of the first position are used as measurement cells. Referring to FIG. 7, taking the method for selecting a measurement cell provided by the embodiment of this application to the network architecture shown in FIG. 1 as an example, the first position in this application may be the first position shown in FIG. The beam direction of the neighboring cell in the application may be the beam direction shown in FIG. 7. The positioning server 120 can use the method of the present application to use the cell 1 and cell 3 that belong to the first half plane and whose beam direction points to the first position as the measurement cell. , To filter out other neighboring cells in the first half plane.

It should be noted that the first position of the terminal device in the first direction determined by the positioning server in this application is the first position of the terminal device in the first direction estimated by the positioning server, and it is not necessarily the terminal device in the first direction. Actual position up.

With the method provided in the embodiments of the present application, the measurement cell with the smallest GDOP can be selected for performing the OTDOA positioning method, that is, the terminal device can be located close to the geometric center of the geometric shape formed by the measurement cell selected by the method, that is, Make the terminal equipment in a better measuring position, which can improve the positioning accuracy.

In the embodiment of this application, after the positioning server selects the measurement cell, it can notify the terminal device of the information of the measurement cell, for example, the identification of the measurement cell and the position of the antenna in the cell, and can also notify the measurement cell to send to the terminal device Positioning signal, the terminal equipment can then measure the positioning signal sent by the measuring cell to obtain positioning measurement information, such as the time difference of arrival of the signal of the measuring cell. After the terminal equipment measures the positioning measurement information, it can report the positioning measurement information to the positioning server. The location server may determine the location of the terminal device by using a location calculation algorithm based on the location measurement information reported by the terminal device and the cell-related information reported by the serving base station of each measurement cell.

In an implementation manner based on the foregoing possible examples, the positioning server may, but is not limited to, adopt the following manner 1 to determine the beam direction of each neighboring cell included in at least two neighboring cells.

Manner 1: The positioning server obtains the horizontal direction angle and position of each second antenna included in the at least two second antennas, and respectively, according to the horizontal direction angle and position of each second antenna included in the at least two second antennas Determine the beam direction of each neighboring cell. Among them, the second antenna is an antenna of a neighboring cell.

In an implementation manner based on the foregoing possible examples, the positioning server may, but is not limited to, adopt the following manner 2 to determine the first position of the terminal device in the first direction.

Manner 2: The positioning server determines the first distance between the terminal device and the first antenna, and determines a position that is the first distance from the first antenna in the first direction as the first position.

In a possible implementation manner based on the foregoing implementation manner 2, the positioning server may, but is not limited to, use any one of the following three manners to determine the first distance between the terminal device and the first antenna.

Manner 201: The positioning server obtains a first distance, and the positioning server determines half of the first distance as the first distance.

Manner 202: The positioning server obtains a plurality of first distances, and the positioning server determines an average value of a half of each of the plurality of first distances as the first distance. For example, suppose that the positioning server obtains five first intervals, which are 1000 meters, 1200 meters, 1600 meters, 1800 meters, or 2000 meters, respectively, and the corresponding half of each first distance is 500 meters, 600 meters, 800 meters, 900 meters or 1000 meters, the first distance can be determined as: (500+600+800+900+1000)/5=960 meters.

Manner 203: The positioning server determines the first distance according to the signal strength of the terminal device to the serving cell. It can be understood that the stronger the signal strength from the terminal device to the serving cell, the smaller the first distance.

The method for selecting a measurement cell provided by an embodiment of the present application will be described below with reference to FIGS. 8-9.

Referring to FIG. 8, a flowchart of another method for selecting a measurement cell provided in an embodiment of this application. The method shown in FIG. 8 includes the following steps:

Step 201: The positioning server or the terminal device triggers a positioning request, requesting to locate the terminal device.

Step 202: The positioning server conducts capability negotiation and positioning method selection with the terminal device. For example, the positioning server and the terminal device can select the OTDOA positioning method to locate the terminal device through negotiation.

Step 203: the positioning server obtains the horizontal direction angle and position of the first antenna, and the horizontal direction angle and position of each second antenna included in the at least two second antennas from the network device. The meanings of the first antenna and the second antenna in this example are the same as those in the above-mentioned FIG. 5, and will not be repeated here.

Step 204: The positioning server determines the first direction according to the horizontal direction angle and position of the first antenna, and determines the first position of the terminal device in the first direction, according to the position of each second antenna included in the at least two second antennas. The horizontal direction angle and position are used to determine the beam direction of each neighboring cell. From the beam directions of each neighboring cell included in at least two neighboring cells, at least two beam directions pointing to the first position are selected. The neighboring cells respectively corresponding to the beam directions pointing to the first position are used as measurement cells.

It should be noted that in this example, how the positioning server determines the first direction according to the horizontal direction angle and position of the first antenna, and how to determine the first position of the terminal device in the first direction, can refer to the related description in FIG. 5 above. The repetition will not be repeated.

Step 205: The positioning server sends a first notification message to the network device to which the measurement cell belongs, where the first notification message is used to notify the terminal device to send a positioning signal. Exemplarily, the positioning server may notify the network device to which it belongs to the information of the selected measurement cell (such as cell identification, etc.). After receiving the notification, the network device turns on the periodicity or continuity of the positioning signal on the corresponding cell. hair.

Step 206: The positioning server sends information about the measurement cell to the terminal device, for example, the identity of the measurement cell.

Step 207: The terminal device measures the positioning signal sent by the measuring cell to obtain positioning measurement information, such as the time difference of arrival of the signal of the measuring cell.

Step 208: The terminal device sends positioning measurement information to the positioning server.

Step 209: The location server uses a location calculation algorithm to determine the location of the terminal device according to the location measurement information reported by the terminal device and the information of each measurement cell.

Step 210: The positioning server sends a positioning end notification to the network device to which the measurement cell belongs.

Referring to FIG. 9, there is a flow chart of another method for selecting a measurement cell according to an embodiment of this application. In FIG. 9, only the selection of a measurement cell performed by the positioning server is taken as an example for illustration. The method shown in FIG. 9 includes the following step:

Step 301: The positioning server obtains the horizontal direction angle and position of the first antenna, and the horizontal direction angle and position of each second antenna included in the at least two second antennas. The meanings of the first antenna and the second antenna in this example are the same as those in the above-mentioned FIG. 5, and will not be repeated here.

Step 302: The positioning server determines the first direction from the position of the first antenna to the terminal device according to the horizontal direction angle and position of the first antenna.

Step 303: The positioning server determines the first position of the terminal device in the first direction. It can be understood that the first position of the terminal device in the first direction determined by the positioning server here is the first position of the terminal device in the first direction estimated by the positioning server, not necessarily the actual position of the terminal device in the first direction. position.

Step 304: The positioning server separately determines the beam direction of each neighboring cell according to the horizontal direction angle and position of each second antenna included in the at least two second antennas, from each neighboring cell included in the at least two neighboring cells Among the beam directions in, at least two beam directions pointing to the first position are selected, and adjacent cells corresponding to the at least two beam directions pointing to the first position are used as measurement cells.

With the method provided in the embodiments of this application, the measurement cell with the smallest GDOP can be selected for the implementation of the OTDOA positioning method, and the terminal device can be positioned close to the geometric center of the geometric shape formed by the measurement cell, that is, the terminal device can be in a better position. Measure the position to improve the positioning accuracy.

Based on the foregoing embodiment, an embodiment of the present application also provides an apparatus for selecting a measurement cell, which is used to implement the method for selecting a measurement cell provided in the embodiment shown in FIG. 5. Referring to FIG. 10, the apparatus 1000 for selecting a measurement cell includes an acquiring unit 1001 and a processing unit 1002, wherein the acquiring unit 1001 is configured to acquire the horizontal direction angle and position of the first antenna, and the first antenna is The antenna of the serving cell of the terminal equipment; the processing unit 1002 is configured to determine a first direction according to the horizontal direction angle and position of the first antenna, and select at least two of the at least two adjacent cells belonging to the first half plane Measuring cell.

Wherein, the first direction is a direction from the position of the first antenna to the terminal device, the neighboring cell is a neighboring cell of the serving cell, and the first half plane is divided by a first straight line Obtained half-plane, the first straight line is perpendicular to the straight line where the first direction is located, the first straight line passes through the position of the first antenna, and the first half-plane includes the line with the first antenna The position is the ray emitted from the end point in the first direction.

In an optional implementation manner, the device further includes an input and output unit 1003; the input and output unit 1003 is configured to receive the horizontal direction angle and position of the first antenna from the network device, and the network device Is a network device that provides services for the terminal device; or the obtaining unit 1001 is specifically configured to obtain the horizontal direction angle and position of the first antenna locally.

In an optional implementation manner, the processing unit 1002 determines the first direction according to the horizontal direction angle and position of the first antenna in the following manner:

Determine the beam direction of the serving cell according to the horizontal direction angle and position of the first antenna; determine the beam direction as the first direction.

In an optional implementation manner, the processing unit 1002 may select at least two measurement cells from at least two neighboring cells belonging to the first half plane in the following manner:

Determine the first position of the terminal device in the first direction; determine the beam direction of each neighboring cell included in the at least two neighboring cells; determine the beam direction of each neighboring cell included in the at least two neighboring cells; Among the beam directions of the cells, at least two beam directions pointing to the first position are selected; adjacent cells respectively corresponding to the at least two beam directions pointing to the first position are used as measurement cells.

In an optional implementation manner, the processing unit 1002 may determine the beam direction of each neighboring cell included in the at least two neighboring cells in the following manner:

Acquire the horizontal direction angle and position of each second antenna included in the at least two second antennas, where the second antenna is the antenna of the neighboring cell; according to each second antenna included in the at least two second antennas The horizontal direction angle and position of the two antennas respectively determine the beam direction of each adjacent cell.

In an optional implementation manner, the processing unit 1002 may determine the first position of the terminal device in the first direction in the following manner:

Determine a first distance between the terminal device and the first antenna; determine a position that is the first distance from the first antenna in the first direction as the first position.

In an optional implementation manner, the processing unit 1002 may determine the first distance between the terminal device and the first antenna in the following manner:

Obtain one or more first distances, where the first distances refer to the distances between the serving cell and the neighboring cells or each neighboring cell; determine a half of the first distance as the first Distance; or, determining the average value of half of each of the plurality of first distances as the first distance; or according to the signal strength from the terminal device to the serving cell, Determine the first distance.

It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The 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 may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including a number of instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

Based on the above embodiment, an embodiment of the present application also provides an apparatus for selecting a measurement cell, and the apparatus for selecting a measurement cell is used to implement the method shown in FIG. 5. Referring to FIG. 11, the apparatus 1100 for selecting a measurement cell includes a processor 1101 and a memory 1102, where:

The processor 1101 may be a CPU, a GPU, or a combination of a CPU and a GPU. The processor 1101 may further include a hardware chip. The above hardware chip may be ASIC, PLD, DSP or a combination thereof. The above PLD can be CPLD, FPGA, GAL or any combination thereof. It should be noted that the processor 1101 is not limited to the above-mentioned cases, and the processor 1101 may be any processing device capable of implementing the method shown in FIG. 5.

The processor 1101 and the memory 1102 are connected to each other. Optionally, the processor 1101 and the memory 1102 are connected to each other through a bus 1103; the bus 1103 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (extended industry standard architecture). , EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used to represent in FIG. 11, but it does not mean that there is only one bus or one type of bus.

The processor 1101 may be specifically configured to implement the method steps or processes provided in FIG. 5 in the foregoing embodiment of the present application.

In an optional implementation manner, the processor 1101 may also perform other operations. For details, reference may be made to the specific description involved in the steps of the embodiment shown in FIG. 5, which will not be repeated here.

The memory 1102 is used to store programs and data. Specifically, the program may include program code, and the program code includes instructions for computer operations. The memory 1102 may include random access memory (RAM), and may also include non-volatile memory (non-volatile memory), such as at least one disk memory. The processor 1101 executes the program stored in the memory 1102 to implement the above functions, thereby implementing the method shown in FIG. 5.

Based on the same idea as the above method embodiment, the embodiment of the present application also provides a computer-readable storage medium on which some instructions are stored. When these instructions are called and executed by a computer, the computer can complete the above method embodiments and method implementations. Examples of methods involved in any possible design. In the embodiments of the present application, the computer-readable storage medium is not limited. For example, it may be random-access memory (RAM), read-only memory (ROM), etc.

Based on the same concept as the above method embodiment, the present application also provides a computer program product, which can complete the method embodiment and the method involved in any possible design of the above method embodiment when the computer program product is invoked and executed by a computer.

Based on the same concept as the above method embodiment, the present application also provides a chip, which is coupled with a memory, and is used to read computer programs or instructions stored in the memory to complete any of the above method embodiments and method embodiments. The methods involved in possible implementations, where “coupled” means that two components are directly or indirectly combined with each other. This combination can be fixed or movable. This combination can allow fluid, electricity, Electrical signals or other types of signals communicate between the two components.

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to the embodiments of this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the scope of the embodiments of the present application. In this way, if these modifications and variations of the embodiments of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

A method for selecting a measurement cell, characterized in that it comprises:

The positioning server obtains the horizontal direction angle and position of the first antenna, where the first antenna is the antenna of the serving cell of the terminal device;

Determining, by the positioning server, a first direction according to a horizontal direction angle and a position of the first antenna, the first direction being a direction from the position of the first antenna to the terminal device;

The positioning server selects at least two measurement cells among at least two neighboring cells belonging to the first half plane;

Wherein, the neighboring cell is a neighboring cell of the serving cell, the first half-plane is a half-plane divided by a first straight line, and the first straight line is perpendicular to the straight line where the first direction is located, so The first straight line passes through a position of the first antenna, and the first half plane includes a ray emitted in the first direction with the position of the first antenna as an end point.
The method according to claim 1, wherein said positioning server acquiring the horizontal direction angle and position of the first antenna comprises:

The positioning server receives the horizontal direction angle and position of the first antenna from a network device, which is a network device that provides services for the terminal device; or,

The positioning server obtains the horizontal direction angle and position of the first antenna locally.
The method according to claim 1 or 2, wherein the positioning server determining the first direction according to the horizontal direction angle and position of the first antenna comprises:

The positioning server determines the beam direction of the serving cell according to the horizontal direction angle and position of the first antenna;

The positioning server determines the beam direction as the first direction.
The method according to any one of claims 1 to 3, wherein the positioning server selecting at least two measurement cells from at least two neighboring cells belonging to the first half plane comprises:

Determining, by the positioning server, the first position of the terminal device in the first direction;

Determining, by the positioning server, the beam direction of each neighboring cell included in the at least two neighboring cells;

The positioning server selects at least two beam directions pointing to the first position from the beam directions of each neighboring cell included in the at least two neighboring cells;

The positioning server uses the at least two adjacent cells respectively corresponding to the beam directions pointing to the first position as measurement cells.
The method according to claim 4, wherein the positioning server determining the beam direction of each neighboring cell included in the at least two neighboring cells comprises:

Acquiring, by the positioning server, the horizontal direction angle and position of each second antenna included in at least two second antennas, where the second antenna is an antenna of the adjacent cell;

The positioning server determines the beam direction of each adjacent cell according to the horizontal direction angle and position of each second antenna included in the at least two second antennas.
The method according to claim 4 or 5, wherein the positioning server determining the first position of the terminal device in the first direction comprises:

Determining, by the positioning server, a first distance between the terminal device and the first antenna;

The positioning server determines a position that is the first distance away from the first antenna in the first direction as the first position.
The method according to claim 6, wherein the positioning server determining the first distance between the terminal device and the first antenna comprises:

Acquiring, by the positioning server, one or more first distances, where the first distances refer to the distances between the serving cell and the neighboring cells or each neighboring cell;

The positioning server determines a half of the first distance as the first distance; or, the positioning server determines the average value of the half of the first distance in each of the plurality of first distances Is the first distance; or

The positioning server determines the first distance according to the signal strength of the terminal device to the serving cell.
A device for selecting a measurement cell, characterized by comprising: an acquisition unit and a processing unit;

The acquiring unit is configured to acquire the horizontal direction angle and position of a first antenna, and the first antenna is an antenna of a serving cell of a terminal device;

The processing unit is configured to determine a first direction according to the horizontal direction angle and position of the first antenna, and select at least two measurement cells from at least two neighboring cells belonging to the first half plane;

Wherein, the first direction is a direction from the position of the first antenna to the terminal device, the neighboring cell is a neighboring cell of the serving cell, and the first half plane is divided by a first straight line Obtained half-plane, the first straight line is perpendicular to the straight line where the first direction is located, the first straight line passes through the position of the first antenna, and the first half-plane includes the line with the first antenna The position is the ray emitted from the end point in the first direction.
9. The device of claim 8, wherein the device further comprises an input and output unit;

The input and output unit is configured to receive the horizontal direction angle and position of the first antenna from a network device, where the network device is a network device that provides services for the terminal device; or,

The acquiring unit is specifically configured to acquire the horizontal direction angle and position of the first antenna locally.
The device according to claim 8 or 9, wherein the processing unit determines the first direction according to the horizontal direction angle and position of the first antenna in the following manner:

Determine the beam direction of the serving cell according to the horizontal direction angle and position of the first antenna;

The beam direction is determined as the first direction.
The apparatus according to any one of claims 8 to 10, wherein the processing unit selects at least two measurement cells from at least two neighboring cells belonging to the first half plane in the following manner:

Determine the first position of the terminal device in the first direction;

Determining the beam direction of each neighboring cell included in the at least two neighboring cells;

Selecting at least two beam directions pointing to the first position from the beam directions of each neighboring cell included in the at least two neighboring cells;

The at least two adjacent cells respectively corresponding to the beam directions pointing to the first position are used as measurement cells.
The apparatus according to claim 11, wherein the processing unit determines the beam direction of each neighboring cell included in the at least two neighboring cells in the following manner:

Acquiring a horizontal direction angle and position of each second antenna included in at least two second antennas, where the second antenna is an antenna of the neighboring cell;

The beam direction of each adjacent cell is determined according to the horizontal direction angle and position of each second antenna included in the at least two second antennas.
The apparatus according to claim 11 or 12, wherein the processing unit determines the first position of the terminal device in the first direction in the following manner:

Determine the first distance between the terminal device and the first antenna;

Determine a position that is the first distance from the position of the first antenna in the first direction as the first position.
The apparatus according to claim 13, wherein the processing unit determines the first distance between the terminal device and the first antenna in the following manner:

Acquiring one or more first distances, where the first distances refer to the distance between the serving cell and the neighboring cell or each neighboring cell;

Determine one half of the first distance as the first distance; or, determine the average value of the half of the first distance among the plurality of first distances as the first distance ;or

The first distance is determined according to the signal strength of the terminal device to the serving cell.
A chip, characterized by comprising the device for selecting a measurement cell according to any one of claims 8 to 14.
A computer storage medium, wherein the computer storage medium stores computer instructions, and when the instructions run on a computer, the computer executes the method according to any one of claims 1 to 7.
A computer program product, characterized in that, when the computer program product is called by a computer, the computer executes the method according to any one of claims 1 to 7.