CN105430744B

CN105430744B - Positioning method and positioning system

Info

Publication number: CN105430744B
Application number: CN201510934098.2A
Authority: CN
Inventors: 刘文毅; 张辉
Original assignee: Guangzhou Radio And Television Measurement And Testing Co Ltd
Current assignee: Radio And Tv Measurement And Testing Group Co ltd
Priority date: 2015-12-14
Filing date: 2015-12-14
Publication date: 2020-03-24
Anticipated expiration: 2035-12-14
Also published as: CN105430744A

Abstract

A positioning method and system, the method includes the steps: sending a positioning request signal; receiving a positioning request response returned by each base station according to the positioning request signal, wherein the positioning request response comprises GPS geographic position information of the corresponding base station; and positioning processing is carried out according to the sending time of sending the positioning request signal, the receiving time of receiving each positioning request response/the receiving time of receiving the positioning request signal by the base station, and the received GPS geographic position information of each base station corresponding to each positioning request response to determine the positioning position of the mobile terminal. According to the embodiment of the invention, a plurality of mobile terminals can be positioned only by combining GPS positioning based on satellite positioning of a limited number of base stations, so that the communication times of the determined mobile terminals and the satellite are greatly reduced, the use of the satellite can be reduced to the maximum extent, the dependence on the satellite communication signal condition is reduced, and the cost is reduced.

Description

Positioning method and positioning system

Technical Field

The present invention relates to the field of mobile positioning, and in particular, to a positioning method and a positioning system.

Background

Currently, the mainstream Global Positioning System achieves the purpose of accurate Positioning by continuously calculating the three-dimensional position relationship between a plurality of available satellites and a Global Positioning System (GPS) receiver, in the process, a ground control part needs to continuously monitor the running satellites, and a space part needs to ensure that more than 4 available satellites are located above each place at each moment. However, in various fields, there are many occasions where a global positioning system is used, and the number of terminals that need to be positioned is increasingly large, for example, a GPS positioning module is generally installed in a terminal such as a mobile smart phone at present. With the current satellite positioning technology, on the basis of the numerous positioning requirements, the number of times of interconnection with the satellite is increased sharply, and a lot of satellite resources are consumed.

Disclosure of Invention

Accordingly, an object of the embodiments of the present invention is to provide a positioning method and a positioning system, which can reduce the number of times of using satellites to the maximum extent, reduce the number of times of interconnecting a positioned terminal and a satellite, reduce the dependence on the satellite communication signal condition, and reduce the cost.

In order to achieve the purpose, the embodiment of the invention adopts the following technical scheme:

a method of positioning, comprising the steps of:

sending a positioning request signal;

receiving a positioning request response returned by each base station according to the positioning request signal, wherein the positioning request response comprises GPS geographic position information of the corresponding base station;

and positioning processing is carried out according to the sending time of sending the positioning request signal, the receiving time of receiving each positioning request response/the receiving time of receiving the positioning request signal by the base station, and the received GPS geographic position information of each base station corresponding to each positioning request response to determine the positioning position of the mobile terminal.

A method of positioning, comprising the steps of:

receiving a positioning request signal sent by a mobile terminal;

acquiring GPS geographical position information of the base station according to the positioning request signal;

and sending a positioning request response to the mobile terminal, wherein the positioning request response comprises the GPS geographical position information of the base station, and the mobile terminal performs positioning calculation processing to determine the positioning position of the mobile terminal according to the sending time for sending the positioning request signal, the receiving time for receiving each positioning request response/the receiving time for receiving the positioning request signal by the base station and the received GPS geographical position information of each base station corresponding to each positioning request response.

A method of positioning, comprising the steps of:

receiving report information which is sent by a base station and receives a positioning request signal of a mobile terminal, wherein the report information comprises identification information of the mobile terminal and identification information of the base station;

determining whether the transmitting power of a mobile terminal needs to be adjusted according to the received report information sent by each base station;

if yes, sending a transmitting power increasing instruction to the mobile terminal, and resending the positioning request signal after the mobile terminal increases the transmitting power according to the transmitting power increasing instruction.

A positioning system comprising a mobile end, the mobile end comprising:

the signal transmitting module is used for transmitting a positioning request signal;

a response receiving module, configured to receive a positioning request response returned by each base station according to the positioning request signal, where the positioning request response includes GPS geographic location information of a corresponding base station;

and the positioning module is used for positioning and determining the positioning position of the mobile terminal according to the sending time of the positioning request signal, the receiving time of each positioning request response received/the receiving time of the positioning request signal received by the base station, and the received GPS geographic position information of each base station corresponding to each positioning request response.

A positioning system comprising a base station detection end, the base station detection end comprising:

the signal receiving module is used for receiving a positioning request signal sent by the mobile terminal;

the position information acquisition module is used for acquiring the GPS geographical position information of the base station according to the positioning request signal;

and the signal response module is used for sending a positioning request response to the mobile terminal, wherein the positioning request response comprises the GPS geographic position information of the base station, and the mobile terminal performs positioning calculation processing to determine the positioning position of the mobile terminal according to the sending time for sending the positioning request signal, the receiving time for receiving each positioning request response/the receiving time for receiving the positioning request signal by the base station, and the received GPS geographic position information of each base station corresponding to each positioning request response.

A positioning system comprising a control center terminal, the control center terminal comprising:

a report receiving module, configured to receive first report information sent by a base station and used for receiving a positioning request signal of a mobile terminal, where the first report information includes identification information of the mobile terminal and identification information of the base station;

the control terminal adjustment analysis module is used for determining whether the transmitting power of the mobile terminal needs to be adjusted according to the received first report information sent by each base station;

and the instruction sending module is used for sending a transmitting power increasing instruction to the mobile terminal when the determination result of the control terminal adjustment analysis module is yes, and resending the positioning request signal after the mobile terminal increases the transmitting power according to the transmitting power increasing instruction.

According to the scheme of the embodiment of the invention, the mode of directly positioning the mobile terminal based on the satellite of the general GPS positioning module is abandoned, when the mobile terminal is positioned, the mobile terminal is not directly positioned by the satellite, but the mobile terminal is positioned by transmitting the positioning request signal to each base station based on the transmitting time of the positioning request signal, the receiving time of the positioning request signal received by each positioning request response/the receiving time of the base station receiving the positioning request signal and the GPS geographic position information of each base station. After the base station is set, the position of the base station is determined, the GPS geographic position information of the base station can not change any more, and the number of the base stations is limited, so that a plurality of mobile terminals can be positioned only by combining the GPS positioning based on satellite positioning of the limited base stations, the communication frequency of the positioned mobile terminals and the satellite is greatly reduced, the use of the satellite can be reduced to the maximum extent, the dependence on the satellite communication signal condition is reduced, and the cost is reduced.

Drawings

FIG. 1 is a schematic diagram of an environment in which aspects of the present invention may be implemented in one embodiment;

FIG. 2 is a schematic flow chart diagram illustrating a positioning method in accordance with the present invention;

FIG. 3 is a schematic flow chart of a positioning method of the present invention in a second embodiment;

fig. 4 is a schematic flow chart of a positioning method of the present invention in a third embodiment;

FIG. 5 is an interaction flow diagram of the location method of the present invention in one particular example;

FIG. 6 is a schematic diagram of the positioning system of the present invention in one embodiment;

fig. 7 is a schematic structural diagram of a location information obtaining module at a detection end of a base station in a specific example;

fig. 8 is a schematic structural diagram of a location information obtaining module at a detection end of a base station in another specific example.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Fig. 1 is a schematic diagram illustrating an application environment of the solution of the present invention in an embodiment, as shown in fig. 1, in the solution of the present invention, when positioning a mobile terminal 100, interaction among a plurality of devices is involved, including the mobile terminal 100, a base station 101, a control center 102, and a satellite 103 shown in fig. 1. The mobile terminal 100 may be an intelligent terminal device that needs to be positioned, such as a mobile smart phone, an intelligent tablet, an intelligent vehicle-mounted terminal, and the like, and is generally a mobile type or a fixed type intelligent terminal device. Base station 101 may also be in network communication with control center 102 via a wired or wireless network. The base station 101 determines GPS geographical position information of itself based on satellite positioning by the satellite 103.

When the mobile terminal 100 needs to perform positioning, the mobile terminal 100 sends a positioning request signal, each base station 101 receives the positioning request signal and then sends a positioning request response to each mobile terminal 100, and the mobile terminal 100 determines the positioning position of the mobile terminal comprehensively according to the sending time of the positioning request signal sent by each base station 101, the receiving time of the positioning request response returned by each base station received by each base station 101/the receiving time of the positioning request response returned by each base station received by the mobile terminal 100, and the GPS geographic position information of each base station 101.

Embodiments of the positioning method and the positioning system are described below with reference to the schematic diagram shown in fig. 1.

Example one

A flow diagram of a positioning method in one embodiment is shown in fig. 2. In this embodiment, a process of the mobile terminal 100 is described as an example.

As shown in fig. 2, the positioning method in this embodiment includes:

step S201: sending a positioning request signal;

step S202: receiving a positioning request response returned by each base station according to the positioning request signal, wherein the positioning request response comprises the GPS geographical position information of the corresponding base station, and the receiving time of the base station receiving the positioning request signal can be also included;

step S203: and positioning processing is carried out according to the sending time of sending the positioning request signal, the receiving time of receiving each positioning request response/the receiving time of receiving the positioning request signal by the base station, and the received GPS geographic position information of each base station corresponding to each positioning request response to determine the positioning position of the mobile terminal.

According to the scheme of the embodiment of the invention, the method of a universal GPS positioning module for positioning the mobile terminal directly based on the satellite is abandoned, when the mobile terminal is positioned, the mobile terminal is not positioned directly by the satellite, but is positioned by sending the positioning request signal to each base station, and the mobile terminal is positioned based on the sending time of the sending positioning request signal, the receiving time of the receiving response of each positioning request signal/the receiving time of the base station for receiving the positioning request signal and the GPS geographic position information of each base station, because the base station is set, the position is determined, the GPS geographic position information can not change any more, and the number of the base stations is limited, thus a plurality of mobile terminals can be positioned only by combining the GPS positioning based on the satellite of the limited base stations, and the communication times of the positioned mobile terminal and the satellite are greatly reduced, the method can reduce the use of satellites to the maximum extent, reduce the dependence on the satellite communication signal condition and reduce the cost.

When the mobile terminal performs the positioning process in step S203, the mobile terminal may perform the positioning process in any possible manner. In a specific example of the present invention, the calculation may be performed based on a TDOA (time difference of arrival) probabilistic location algorithm, a maximum confidence probability point is given, and the maximum confidence probability point of the calculation result is determined as the location position of the mobile terminal, and a specific manner of determining the location position based on the TDOA probabilistic location algorithm may be performed in any manner that is currently available. In addition, after the positioning position of the mobile terminal is obtained, the positioning position can be displayed on the mobile terminal for the user of the mobile terminal to view.

In addition, as shown in fig. 2, the positioning method in this embodiment may further include:

step S2041: receiving a transmitting power increasing instruction sent by a control center;

step S205: the step of increasing the transmission power may specifically be increasing the transmission power according to the transmission power increase instruction, and returning to step S201 of sending the positioning request signal.

In this case, the mobile terminal may further increase the transmission power based on the transmission power increase instruction of the control center, so that more base stations may receive the positioning request signal of the mobile terminal, so as to improve the positioning accuracy or the positioning accuracy.

On the other hand, as shown in fig. 2, the positioning method in this embodiment may further include:

step S2042: determining whether the transmitting power needs to be adjusted according to the received positioning request response sent by each base station, if so, entering step S205;

step S205: the transmission power is increased and the process returns to step S201 of transmitting the positioning request signal.

In step S2042, there are various ways to determine whether the transmission power of the mobile terminal needs to be adjusted.

In one of the manners, the mobile terminal may determine the number of received positioning request responses according to the received positioning request responses sent by each base station; and when the number is smaller than the preset base station number threshold value, judging that the transmitting power of the mobile terminal needs to be adjusted. When the mobile terminal determines the positioning position of the mobile terminal by combining the sending time of sending the positioning request signal, the receiving time of each base station and the GPS geographic position information of each base station, the number of the base stations receiving the positioning request signal of the mobile terminal affects the precision and accuracy of positioning calculation, and the positioning precision is better when the number of the base stations is larger. The preset base station number threshold value can be set based on actual needs.

In another mode, whether each corresponding base station is in a weak situation area in a radio wave field intensity distribution situation map can be judged according to the received GPS geographic position information in the positioning request response sent by each base station, and if so, the transmission power of the mobile terminal needs to be adjusted. The mobile terminal needs to store a radio wave field intensity distribution situation map in advance, and the radio wave field intensity distribution situation map can be provided by the control center.

Example two

A schematic flow chart of a positioning method in another embodiment is shown in fig. 3. In this embodiment, a process of the base station is described as an example.

As shown in fig. 3, the positioning method in this embodiment includes:

step S301: receiving a positioning request signal sent by a mobile terminal;

step S302: acquiring GPS geographical position information of the base station according to the positioning request signal;

step S303: and sending a positioning request response to the mobile terminal, wherein the positioning request response comprises the GPS geographical position information of the base station, and simultaneously can also comprise the receiving time of the base station for receiving the positioning request signal, and the mobile terminal performs positioning calculation processing to determine the positioning position of the mobile terminal according to the sending time of the positioning request signal, the receiving time of each positioning request response received/the receiving time of the base station for receiving the positioning request signal, and the received GPS geographical position information of each base station corresponding to each positioning request response.

In step S302, the GPS geographic location information of the base station may be acquired in various possible manners.

In one of the ways, the base station can determine its GPS geographic location information by satellite positioning. Therefore, when the mobile terminal needs to be positioned, the base station can perform satellite positioning in real time to obtain the GPS geographic position information of the base station after receiving the positioning request signal of the mobile terminal.

In another approach, the GPS geographic location information for a base station may be obtained from a local database query for that base station. In this case, the base station stores its own GPS geographical position information in a local database after obtaining it by satellite positioning, so as to be inquired and applied when necessary. Because the position of the base station can not be changed after the base station is set, the satellite is not required to be used for positioning the position of the base station every time the mobile terminal is positioned.

In another mode, the GPS geographic location information of the base station may be obtained by querying a local database of the base station, and when the query result indicates that there is no GPS geographic location information, the GPS geographic location information of the base station may be determined by satellite positioning. The GPS geographic position information obtained by satellite positioning can be further stored in a local database so as to be inquired and applied when needed subsequently.

In another mode, a search request including identification information of the base station may be sent to a control center, and the control center searches whether there is GPS geographic position information corresponding to the identification information in a database; receiving a retrieval response returned by the control center according to the retrieval request, wherein the retrieval response is determined by the control center according to the retrieval result of the retrieval; when the retrieval result is yes, the retrieval response comprises the GPS geographic position information which is retrieved from a database by the control center and corresponds to the identification information, and the GPS geographic position information is determined as the GPS geographic position information of the base station; and if the retrieval result is negative, the retrieval response comprises information that the base station needs to perform satellite positioning, and the GPS geographic position information of the base station is determined according to the retrieval response by performing satellite positioning.

Accordingly, after determining the GPS geographic location information of the base station, the GPS geographic location information of the base station determined by satellite positioning may be sent to the control center, and the control center stores the GPS geographic location information of the base station in the database.

In this case, the base station itself may store the own GPS geographical location information, but after determining the own GSP geographical location information, the own GPS geographical location information may be stored in the control center and acquired from the control center when necessary. The GPS geographic position information of the base station is stored in the control center, and the control center can conveniently perform other applications based on the GPS geographic position information of the base station. For example, the following method determines whether the transmission power of the mobile terminal needs to be adjusted according to the number of received positioning request signals of the mobile terminal or the GPS geographical location information.

As shown in fig. 3, in a specific example, after receiving the positioning request signal of the mobile terminal in step S301, the positioning method in this embodiment further includes:

step S3012: and sending first report information of a positioning request signal of a received mobile terminal to a control center, wherein the first report information comprises identification information of the mobile terminal and identification information of the base station.

In this case, the base station sends the first report information of the positioning request signal received by the mobile terminal to the control center, and the control center can analyze whether the transmission power of the mobile terminal needs to be adjusted based on the first report information of each base station, so as to improve the positioning accuracy or the positioning accuracy.

For the purpose of illustration, the schematic diagram of fig. 3 is illustrated by taking an example that the first report information is sent to the control center first and then the GPS geographic location information of the base station is obtained, and in an actual technical implementation process, the two processes may not be in the order shown in fig. 3, and may be performed synchronously.

EXAMPLE III

Fig. 4 is a schematic flow chart of a positioning method in a third embodiment, and in this example, a process procedure at the control center is taken as an example for explanation.

As shown in fig. 4, the method in this embodiment includes:

step S401: receiving first report information which is sent by a base station and receives a positioning request signal of a mobile terminal, wherein the first report information comprises identification information of the mobile terminal and identification information of the base station;

step S402: determining whether the transmitting power of the mobile terminal needs to be adjusted according to the received first report information sent by each base station, if so, entering step S403;

step S403: and sending a transmitting power increasing instruction to the mobile terminal, and resending the positioning request signal after the mobile terminal increases the transmitting power according to the transmitting power increasing instruction.

In this case, when the base station receives the positioning request signal sent by the mobile terminal, the base station needs to send the first report information of the positioning request signal received by the mobile terminal to the control center, so that the control center can analyze whether the transmission power of the mobile terminal needs to be adjusted based on the first report information of each base station, so as to improve the positioning accuracy or the positioning accuracy.

In step S402, the control center may determine whether the transmission power of the mobile terminal needs to be adjusted in various ways.

In one mode, the control center may determine, according to the received first report information sent by each base station, the number of base stations that receive the positioning request signal of the mobile terminal; and when the number is smaller than the preset base station number threshold value, judging that the transmitting power of the mobile terminal needs to be adjusted. When the mobile terminal determines the positioning position of the mobile terminal by combining the sending time of the sending positioning request signal, the receiving time of each base station and the GPS geographic position information of each base station, the number of the base stations receiving the positioning request signal of the mobile terminal affects the precision and accuracy of positioning calculation, and the greater the number of the base stations, the better the positioning precision. The preset base station number threshold value can be set based on actual needs.

In another mode, the control center may determine whether each base station receiving the positioning request signal of the mobile terminal is in a weak situation area in a radio wave field intensity distribution situation map according to the received first report information sent by each base station, and if so, determine that the transmission power of the mobile terminal needs to be adjusted.

In this case, the control center needs to store a radio field intensity distribution map in advance. Accordingly, as shown in fig. 4, the method in this embodiment may further include the steps of:

step S4001: receiving second report information sent by each base station when receiving a signal sent by a mobile terminal by adopting radio waves with a specified frequency, wherein the second report information comprises the specified frequency, field intensity and GPS geographic position information of the base station;

step S4002: and analyzing by adopting an urban radio wave propagation model according to the second report information of each base station, and establishing the radio wave field intensity distribution situation map.

Therefore, based on the radio wave field intensity distribution situation diagram established above, the signal intensity of the received signal and the position of the base station when the base station receives the mobile positioning signal of the mobile terminal are directly reflected, so that whether the base station is in a weak area in the radio wave field intensity distribution situation diagram or not can be confirmed, and under the condition of being in the weak area, the mobile terminal can be controlled to increase the transmitting power for transmitting the positioning request signal, so that more base stations can receive the positioning request signal of the mobile terminal, and the positioning accuracy is improved.

Based on the embodiments described above, fig. 5 shows a flowchart of a satellite-based positioning method in a specific example, which is described by taking an interaction process between a mobile terminal, a base station detection terminal of a base station, and a control center as an example.

As described above, the main positioning idea of the embodiment of the present invention is to position the mobile terminal with reference to the geographical location of the base station, and therefore, the accuracy of the position of the base station has a direct influence on the positioning accuracy of the mobile terminal. Before the scheme of the embodiment of the invention is initially executed, the position of the base station per se can be accurately positioned based on a satellite for a plurality of times, and the final credible positioning result data (namely the GPS geographic position information of each base station) is stored in the local database of the base station per se, or is stored in the local database of the control center after being sent to the control center, or is simultaneously stored in the database of the base station per se and the database of the control center so as to be called and referred when the subsequent application is needed. The specific way to perform GPS positioning on the base station may be performed in any way that is currently available and that may appear in the future.

And then, the control center is connected with each base station, specifically a monitoring receiver of each base station, whether the starting state of the base station is good or not is checked, when the base station is used for the first time, a satellite positioning instruction needs to be sent to each base station, the base station starts a GPS positioning module based on the satellite positioning instruction, the base station positioning template data is acquired, the GPS geographic position information of the base station is determined, and the successfully acquired GPS geographic position information is stored in a local database of the base station and/or uploaded to a database of the control center for storage. Under the condition of non-first-time use, the GPS can be regularly positioned at intervals, the GPS geographic position information of the base station is determined, the GPS geographic position information stored in the base station is compared and updated, and the GPS geographic position information is uploaded to the control center and compared and updated with the GPS geographic position information stored in the database of the control center.

In addition, when in use, the control center can also detect and control normal startup of the monitoring receiver of the base station, normal environmental monitoring items (such as temperature and humidity, radio interference and the like), normal environmental indexes and the like, and the specific detection and control mode can be performed by adopting the existing mode, which is not described in detail herein.

The control center can send a positioning starting request to the mobile terminal, after receiving the positioning starting request, the mobile terminal can test whether the starting state of the mobile terminal is good, monitor whether the communication frequency band is available, and whether interference such as common frequency, adjacent frequency and intermodulation does not exist, set monitoring bandwidth and monitor in real time, and can start or start the positioning request under the ideal state that the starting state is good, the communication frequency band is available, the interference such as common frequency, adjacent frequency and intermodulation does not exist.

After the preliminary preparation work is finished, under the condition of opening the positioning situation, each mobile terminal adopts the radio wave of the appointed frequency to transmit a signal, namely, the radio wave of the appointed frequency is transmitted, and after each base station receiver receives the signal, the second report information transmitted when the signal transmitted by the mobile terminal by adopting the radio wave of the appointed frequency is received is transmitted to the control center, wherein the second report information comprises the appointed frequency, the field intensity and the identification information of the base station. And analyzing by the control center according to the second report information of each base station by adopting an urban radio wave propagation model, and establishing the radio wave field intensity distribution situation map. The specific implementation manner of the urban radio wave propagation model and the analysis and establishment of the radio wave field intensity distribution situation map based on the urban radio wave propagation model can be any manner which is currently available or may appear in the future.

After each mobile terminal starts positioning, radio waves with specified frequency are actively transmitted for many times and received by radio receivers of base stations at all corners of a city, the received scanned data must have frequency and field intensity data, the field intensity data and GPS geographic position information of the base station receivers are arranged, a city radio wave propagation model is adopted for analysis, and a radio wave field intensity distribution situation map of the whole city area can be established and rendered on an electronic map of a control center by developing the electronic map. The radio wave field intensity distribution situation map established by the control center can also be sent to the mobile terminal 100, so that the mobile terminal 100 can judge whether the transmission power needs to be adjusted or not.

When the positioning is turned on, the mobile station transmits a positioning request signal to search for a monitoring receiver of a nearby base station.

After receiving a positioning request signal sent by a mobile terminal, a monitoring receiver of a base station acquires GPS geographical position information of the monitoring receiver, and also sends first report information of the positioning request signal of the mobile terminal to a control center, wherein the first report information comprises identification information of the mobile terminal and identification information of the base station. The identification information of the base station may be information such as a receiver number of the base station.

The manner of acquiring the GPS geographic location information of the base station itself by the base station may be any one of the manners described above, such as real-time GPS positioning, query from a local database, real-time GPS positioning when the local database does not exist, query from a control center, and the like.

After the base station obtains the GPS geographical position information of the base station, a positioning request response is sent to the mobile terminal, wherein the positioning request response comprises the GPS geographical position information of the base station and the receiving time of the base station for receiving the positioning request signal.

After receiving the positioning request response returned by each base station, the mobile terminal may determine the positioning location of the mobile terminal comprehensively according to the sending time of the mobile terminal sending the positioning request signal, the receiving time of each base station receiving the positioning request signal, and the GPS geographic location information of each base station 101, if the positioning request response includes the receiving time of the base station receiving the positioning request signal. When the positioning request response does not include the time of receiving the positioning request signal by the base station, the mobile station may determine the positioning location of the mobile station comprehensively according to the time of sending the positioning request signal by the mobile station, the time of receiving the positioning request response returned by each base station received by the mobile station, and the GPS geographic location information of each base station 101. After the positioning position of the mobile terminal is obtained, the positioning position can be displayed on an electronic map of the mobile terminal.

The mobile terminal may perform the positioning calculation in any possible manner. In a specific example of the present invention, the calculation may be performed based on a TDOA (time difference of arrival) probabilistic location algorithm, a maximum confidence probability point is given, the maximum confidence probability point of the calculation result is determined as a location position of the mobile terminal, and the location position is displayed on a display interface of an electronic map of the mobile terminal. The specific method for determining the location position based on the TDOA probability location algorithm can be performed in any existing method, and based on the TDOA probability location algorithm, the most probable location point generally appears at the place where the TDOA location curves of the monitoring stations are most densely intersected, for example, as shown by point P in fig. 1.

In addition, after receiving the positioning request responses returned by the base stations, the mobile terminal can further determine whether the number of the received positioning request responses is smaller than a preset base station number threshold value and whether the base stations corresponding to the received positioning request responses are in a weak situation area in a radio wave field intensity distribution situation diagram. The specific amplitude of the increased transmission power may be set based on actual needs, for example, a fixed amplitude of the transmission power is increased each time, or a specified percentage of the transmission power is increased, and the embodiment of the present invention is not limited to this.

This is considered that, in the specific positioning, the purpose of having the mobile terminal initiate the positioning request signal is to allow more base station receivers to receive the positioning request signal. However, due to factors such as complex terrain and blocking of terrain, only a few nearby base stations may receive the signals, and too few base stations may not meet the requirement of positioning accuracy of the TDOA probabilistic positioning algorithm, so the number of base stations that have received the positioning request signal of the mobile terminal, or whether the base stations are in a region with a weaker radio field strength of the city, may be analyzed, and if the number is small or the base stations are in a region with a weaker radio field strength, the purpose of receiving more base stations may be achieved by increasing the radio transmission power of the mobile terminal, so as to improve the positioning accuracy.

On the other hand, after receiving the first report information of the base station, the control center searches the local database of the control center for the GPS geographic position information corresponding to the identification information of the current base station. And when the GPS geographical position information corresponding to the identification information is retrieved and completely stored, the base station can be identified and displayed on a display interface of the control center in a chart form.

And if the GPS geographic position information corresponding to the identification information of the current base station is not retrieved from a local database of the control center, or the content of the retrieved GPS geographic position information is incomplete (for example, only the identification information of the base station is stored, no corresponding GPS geographic position information is stored, and the like), sending a satellite positioning instruction to the corresponding base station.

After receiving the satellite positioning instruction sent by the control center, the base station acquires the GPS geographical position information stored locally, or performs satellite positioning according to the satellite positioning instruction to acquire the GPS geographical position information of the base station, and then sends the GPS geographical position information stored locally or acquired through satellite positioning to the control center. The GPS geographic position information of the base station is stored in a database by the control center, and the base station can be identified and displayed on a display interface in a chart form by the control center based on the GPS geographic position information.

When the control center displays the icons of the base stations and the number of the base stations, the control center combines the GPS geographic position information of the base stations, can control the orientation arrangement condition of the base stations as much as possible, and keeps the monitoring stations of the base stations in all the orientations as much as possible instead of centralizing a large number of the monitoring stations in the same orientation, so as to avoid reducing the positioning accuracy.

After receiving the first report information of each base station and determining the GPS geographic location information of each base station, the control center may further determine whether the number of base stations that receive the positioning request information of the mobile terminal is less than a preset base station number threshold, and whether each base station that receives the positioning request signal of the mobile terminal is in a weak area in a radio wave field intensity distribution situation map. The specific preset base station number threshold may be set based on actual needs, for example, 3.

And the mobile terminal receives the power increasing instruction, increases the transmitting power according to the transmitting power increasing instruction, then retransmits the positioning request signal and repeatedly executes the process. The specific amplitude of increasing the transmission power may be set based on actual needs, and may be specified by the control center, or may be autonomously determined by the mobile terminal, for example, a fixed amplitude of the transmission power is increased each time, or a specified percentage of the transmission power is increased, and the like.

Based on the above-mentioned positioning method of each example of the present invention, the target terminal (mobile terminal) does not need to use any GPS positioning module, but only needs to install communication and GPS positioning modules on the base station, and can achieve the purpose of positioning the mobile terminal by positioning the base station position through the satellite and performing TDOA probability positioning on the mobile terminal by combining the base station position. Because the number of the base stations is limited and the positions are unchanged, the number of times of positioning interconnection between the positioned end and the satellite is reduced by means of dense base station distribution, the dependence on the satellite communication signal condition is reduced, the purpose of reducing the cost is achieved, and the expandability is greatly improved.

In addition, the scheme of the embodiment of the invention transplants the most main positioning process to the ground, greatly reduces the use requirement on satellite resources and relieves the current state of tense use of the satellite resources. And the phenomena of delay, retardation and the like caused by the fact that satellite positioning excessively depends on network communication conditions are solved by simulating the terrain conditions of urban areas and performing simulated positioning in a mode of simulating an urban radio wave propagation model by using ultrashort waves.

The scheme of the embodiment of the invention can be preferably applied to suburb areas with dense base stations, the suburb base stations are dense at present, the signal strength is analyzed by fully considering and simulating the distribution of ground terrain, ground objects and the like and using an urban radio wave propagation model, the positioning reference can be provided for areas with poor signals, and the positioning precision is improved. Moreover, because the positioning is carried out based on intensive base stations, the positioning result is completed on the basis of large data acquisition and processing, and the reliability is high.

Based on the same idea as that of each embodiment of the positioning method, the embodiment of the present invention further provides a positioning system. The system of the embodiment of the invention relates to a multi-terminal communication process, which comprises a positioned mobile terminal, a base station detection terminal arranged on a base station and a control center terminal arranged on a control center. The positioning system of the embodiment of the present invention may include any one or any combination of a mobile terminal disposed at the device to be positioned, a base station detection terminal disposed at the base station, and a control center terminal disposed at the control center.

Fig. 6 is a schematic structural diagram of a positioning system according to an embodiment of the present invention, and for convenience of description, fig. 6 illustrates an example that includes a mobile terminal 61, a base station detection terminal 62, and a control center terminal 63, and such an exemplary description is not intended to limit the present invention.

As shown in fig. 6, the moving end 61 in the system of the present embodiment includes:

a signal transmitting module 611, configured to send a positioning request signal;

a response receiving module 612, configured to receive a positioning request response returned by each base station according to the positioning request signal, where the positioning request response includes GPS geographic location information of the corresponding base station;

a positioning module 613, configured to perform positioning processing to determine a positioning location of the mobile terminal according to sending time of the positioning request signal, receiving time of each positioning request response/receiving time of the positioning request signal by the base station, and received GPS geographic location information of each base station corresponding to each positioning request response.

Correspondingly, in this embodiment, the base station detecting end 62 includes:

a signal receiving module 621, configured to receive a positioning request signal sent by a mobile terminal;

a location information obtaining module 622, configured to obtain GPS geographic location information of the base station according to the positioning request signal;

a signal response module 623, configured to send a positioning request response to the mobile terminal, where the positioning request response includes GPS geographic location information of the base station, and the mobile terminal performs positioning calculation processing according to sending time of sending the positioning request signal, receiving time of receiving each positioning request response/receiving time of receiving the positioning request signal by the base station, and received GPS geographic location information of each base station corresponding to each positioning request response to determine a positioning location of the mobile terminal.

Based on the scheme of the embodiment of the invention, in the process of positioning, the specific working process can be as follows:

the mobile terminal 61 sends a positioning request signal, the positioning request signal includes the sending time of sending the positioning request signal and the identification information of the mobile terminal 61, the information receiving module 621 of the base station detecting terminal 62 receives the positioning request signal sent by the mobile terminal 61, the position information obtaining module 622 obtains the GPS geographic position information of the base station, and then the signal responding module 623 sends a positioning request response to the mobile terminal, the positioning request response includes the GPS geographic position information of the base station and also includes the receiving time of receiving the positioning request signal by the base station, the response receiving module 612 of the mobile terminal 61 receives the positioning request response sent by the base station, and the positioning module 613 receives the positioning request signal according to the sending time of sending the positioning request signal, the receiving time of receiving each positioning request response/the receiving time of receiving the positioning request signal by the base station, And the received GPS geographic position information of each base station corresponding to each positioning request response is used for positioning processing to determine the positioning position of the mobile terminal.

Fig. 7 shows a schematic structural diagram of the location information obtaining module 622 in a specific example. As shown in fig. 7, the location information acquiring module 622 may only include the local query module 6221, may only include the GPS positioning module 6222, or may include both the local query module 6221 and the GPS positioning module 6222.

When the location information acquiring module 622 only includes the local query module 6221, the local query module 6221 is configured to query and acquire the GPS geographic location information of the base station from the local database of the base station.

In this case, each base station, after obtaining its own GPS geographical position information by satellite positioning, stores its own GPS geographical position information locally for inquiry and application when necessary. Because the position of the base station can not be changed after the base station is set, the satellite is not required to be used for positioning the position of the base station every time the mobile terminal is positioned.

When the location information acquiring module 622 includes only the GPS positioning module 6222, the GPS positioning module 6222 is configured to determine the GPS geographical location information of the base station through satellite positioning. Thus, when needed, the GPS positioning module 6222 can directly perform satellite positioning in real time to obtain the GPS geographical position information of the base station.

When the location information acquiring module 622 includes both the local query module 6221 and the GPS positioning module 6222, the local query module 6221 is configured to query and acquire the GPS geographic location information of the base station from the local database of the base station, and send a positioning instruction to the GPS positioning module 6222 when the query result indicates that there is no GPS geographic location information, and the GPS positioning module 6222 is configured to determine the GPS geographic location information of the base station through satellite positioning when receiving the positioning instruction of the local query module 6221.

In this case, each base station can store its own GPS geographical location information obtained by satellite positioning locally for query and application when necessary. Because the position of the base station can not be changed after the base station is set, the satellite is not required to be used for positioning the position of the base station every time the mobile terminal is positioned. As a remedy, in the case that the GPS geographic location information stored by the base station is not perfect or even not stored, the local query module 6221 may further instruct the GPS positioning module 6222 to perform satellite positioning to obtain the GPS geographic location information, which may further perfect the acquisition of the GPS geographic location information of the base station.

Fig. 8 shows a schematic structural diagram of the location information acquiring module 622 in another embodiment. As shown in fig. 8, the location information acquisition module 622 in this example includes a retrieval request module 6223, a retrieval response reception module 6224, a GPS positioning module 6222, and a location information determination module 6225. Wherein:

a retrieval request module 6223, configured to send a retrieval request to the control center, where the retrieval request includes identification information of the base station, and the control center retrieves, from a database, whether there is GPS geographic location information corresponding to the identification information;

a retrieval response receiving module 6224, configured to receive a retrieval response returned by the control center according to the retrieval request, where the retrieval response is determined by the control center according to a retrieval result of whether there is GPS geographic location information corresponding to the identification information retrieved from a database, and when the retrieval result is yes, the retrieval response includes the GPS geographic location information corresponding to the identification information retrieved from the database by the control center, and when the retrieval result is no, the retrieval response includes information that a base station needs to perform satellite positioning;

a GPS positioning module 6222, configured to determine GPS geographic location information of the base station through satellite positioning;

a location information determining module 6225, configured to determine, according to the retrieval response received by the retrieval response receiving module 6224, when the retrieval response includes GPS geographic location information, the GPS geographic location information in the retrieval response as the GPS geographic location information of the base station, and when the retrieval response includes information that the base station needs to perform satellite positioning, send a positioning instruction to the GPS positioning module 6222, and determine the GPS geographic location information of the base station through the GPS positioning module 6222.

Correspondingly, as shown in fig. 6, the base station detecting end 62 in this embodiment may further include:

a position reporting module 625, configured to send the GPS geographic position information of the base station obtained by the GPS positioning module 6222 to the control center 63, and the control center 63 stores the GPS geographic position information of the base station in the database.

As shown in fig. 6, the control center terminal 63 in this embodiment may include:

a report receiving module 631, configured to receive first report information sent by a base station and received a positioning request signal of a mobile terminal, where the first report information includes identification information of the mobile terminal and identification information of the base station;

a control terminal adjustment analysis module 632, configured to determine whether to adjust the transmission power of the mobile terminal according to the received first report information sent by each base station;

an instruction sending module 633, configured to send a transmit power increase instruction to the mobile terminal when a determination result of the control terminal adjustment analysis module is yes, where the mobile terminal retransmits the positioning request signal after increasing transmit power according to the transmit power increase instruction.

an information reporting module 624, configured to send, to the control center, first reporting information of the positioning request signal received from the mobile terminal when the positioning request signal is received, where the first reporting information includes identification information of the mobile terminal and identification information of the base station.

Accordingly, as shown in fig. 6, the moving end 61 in the present embodiment may further include:

and the instruction receiving module 614 is configured to receive the transmission power increase instruction sent by the control center.

At this time, the signal transmitting module 611 is further configured to transmit a positioning request signal after increasing the transmission power according to the transmission power increase instruction.

In this case, the control center may further analyze whether the transmission power of the mobile terminal needs to be adjusted based on the first report information of each base station, so as to improve the positioning accuracy or the positioning accuracy.

The control end adjustment analyzing module 632 may determine whether the transmission power of the mobile end needs to be adjusted in various ways, specifically, as shown in fig. 6, the control end adjustment analyzing module 632 may further include any one or both of a control end number determining module 6321 and a control end area determining module 6332.

The control end number determining module 6321 is configured to determine, according to the received first report information sent by each base station, the number of base stations that receive the positioning request signal of the mobile end, and determine that the transmission power of the mobile end needs to be adjusted when the number is smaller than a preset base station number threshold. When the positioning calculation processing is performed to determine the positioning position of the mobile terminal by combining the sending time of the mobile terminal sending the positioning request signal, the receiving time of each base station receiving the positioning request signal or the time of the mobile terminal receiving the positioning request response of the base station, and the acquired GPS geographical position information of each base station, the number of the base stations receiving the positioning request signal of the mobile terminal affects the precision and accuracy of the positioning calculation, and the greater the number of the base stations, the better the positioning precision, therefore, by setting the preset base station number threshold, under the condition that the number of the base stations receiving the mobile terminal is smaller, the mobile terminal can be controlled to increase the transmitting power of the sending positioning request signal, so that more base stations can receive the positioning request signal of the mobile terminal, and the positioning precision is improved. The preset base station number threshold value can be set based on actual needs.

The control end region determining module 6232 is configured to determine, according to the received first report information, whether each base station that receives the positioning request signal of the mobile terminal is in a weak situation region in a radio wave field intensity distribution situation map, and if so, determine that the transmission power of the mobile terminal needs to be adjusted.

In this case, the control center needs to store a radio field intensity distribution map in advance. Accordingly, as shown in fig. 6, the control center 63 in this embodiment may further include:

a distribution diagram establishing module 630, configured to receive second report information sent by each base station when receiving a signal sent by a mobile terminal using radio waves with a specified frequency, where the second report information includes the specified frequency, field strength, and GPS geographic location information of the base station, and according to the second report information of each base station, analyze the second report information by using an urban radio wave propagation model, and establish a radio wave field strength distribution situation diagram.

Therefore, based on the radio wave field intensity distribution situation diagram established above, the signal intensity of the received signal and the position of the base station when the base station receives the mobile positioning signal of the abnormal movement list are directly reflected, so that whether the base station is in a weak area in the radio wave field intensity distribution situation diagram or not can be confirmed, and under the condition of being in the weak area, the mobile terminal can be controlled to increase the transmitting power for transmitting the positioning request signal, so that more base stations can receive the positioning request signal of the mobile terminal, and the positioning accuracy is improved.

The radio wave field intensity distribution situation map obtained by the control center 63 can also be sent to the mobile terminal 61, so that the mobile terminal 61 can analyze whether the power needs to be increased or not.

Accordingly, as shown in fig. 6, the mobile terminal 61 of this embodiment may further include a mobile terminal adjustment analysis module 615, configured to determine whether to adjust the transmission power according to the received positioning request response sent by each base station.

At this time, the signal transmitting module 611 is further configured to increase the transmission power and then send a positioning request signal when the mobile terminal adjustment analyzing module 615 determines that the transmission power needs to be adjusted.

The mobile terminal adjustment analysis module 615 may determine whether the transmission power of the mobile terminal needs to be adjusted in a plurality of ways, specifically, as shown in fig. 6, the mobile terminal adjustment analysis module 615 may further include any one of a mobile terminal number determination module 6151 and a mobile terminal area determination module 6152, or both of them.

The mobile terminal number determining module 6151 is configured to determine the number of received positioning request responses according to the received positioning request responses sent by each base station; and when the number is smaller than the preset base station number threshold value, judging that the transmitting power of the mobile terminal needs to be adjusted.

When the mobile terminal determines the positioning position of the mobile terminal by combining the sending time of sending the positioning request signal, the receiving time of each base station and the GPS geographic position information of each base station, the number of the base stations receiving the positioning request signal of the mobile terminal affects the precision and accuracy of positioning calculation, and the positioning precision is better when the number of the base stations is larger. The preset base station number threshold value can be set based on actual needs.

In addition, the mobile terminal area determining module 6152 is configured to determine, according to the received GPS geographic location information in the positioning request response sent by each base station, whether each corresponding base station is in a weak area in a radio wave field intensity distribution situation map, and if so, determine that the transmission power of the mobile terminal needs to be adjusted. Wherein the radio wave field intensity distribution situation map can be provided by the control center or stored in advance to the mobile terminal 61.

Other technical features of the system according to the embodiment of the present invention are the same as those of the method embodiments described above, and are not described in detail herein.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method of positioning, comprising the steps of:

transmitting a positioning request signal to a base station;

positioning processing is carried out according to the sending time of sending the positioning request signal, the receiving time of receiving each positioning request response/the receiving time of the base station receiving the positioning request signal and the received GPS geographical position information of each base station corresponding to each positioning request response to determine the positioning position of the mobile terminal;

further comprising the steps of: determining whether the transmitting power needs to be adjusted according to the received positioning request response sent by each base station, if so, returning to the step of sending the positioning request signal after increasing the transmitting power;

the method for determining whether the transmission power needs to be adjusted according to the received positioning request response sent by each base station further comprises the following steps:

and judging whether the corresponding base stations are in weak situation areas in a radio wave field intensity distribution situation map or not according to the received GPS geographical position information in the positioning request response sent by each base station, and if so, judging that the transmitting power of the mobile terminal needs to be adjusted.

2. The positioning method according to claim 1, characterized in that;

further comprising the steps of: receiving a transmitting power increasing instruction sent by a control center; and increasing the transmission power according to the transmission power increase instruction, and returning to the step of sending the positioning request signal.

3. A method of positioning, comprising the steps of:

receiving a positioning request signal sent by a mobile terminal;

acquiring GPS geographical position information of a base station according to the positioning request signal;

sending a positioning request response to the mobile terminal, wherein the positioning request response comprises GPS geographical position information of the base station, and the mobile terminal performs positioning calculation processing to determine the positioning position of the mobile terminal according to the sending time for sending the positioning request signal, the receiving time for receiving each positioning request response/the receiving time for receiving the positioning request signal by the base station, and the received GPS geographical position information of each base station corresponding to each positioning request response;

after receiving the positioning request response returned by each base station, the method further comprises the following steps:

and judging whether the corresponding base stations are in weak situation areas in a radio wave field intensity distribution situation map or not according to the received GPS geographical position information in the positioning request response sent by each base station, and if so, adjusting the transmitting power of the mobile terminal.

4. The positioning method according to claim 3, wherein the manner of acquiring the GPS geographical position information of the base station according to the positioning request signal comprises any one of the following manners:

determining GPS geographical position information of the base station through satellite positioning;

inquiring and acquiring GPS geographic position information of a base station from a local database of the base station;

inquiring and acquiring GPS geographic position information of a base station from a local database of the base station, and determining the GPS geographic position information of the base station through satellite positioning when the inquiry result shows that the GPS geographic position information does not exist;

sending a retrieval request to a control center, wherein the retrieval request comprises identification information of the base station, and the control center retrieves whether GPS geographic position information corresponding to the identification information exists in a database; receiving a retrieval response returned by the control center according to the retrieval request, wherein the retrieval response is determined by the control center according to the retrieval result of the retrieval; when the retrieval result is yes, the retrieval response comprises the GPS geographic position information which is retrieved from a database by the control center and corresponds to the identification information, and the GPS geographic position information is determined as the GPS geographic position information of the base station; and if the retrieval result is negative, the retrieval response comprises information that the base station needs to perform satellite positioning, and the GPS geographic position information of the base station is determined according to the retrieval response by performing satellite positioning.

5. The positioning method according to claim 4, further comprising the steps of:

and sending the GPS geographical position information of the base station determined by satellite positioning to the control center, and storing the GPS geographical position information of the base station into the database by the control center.

6. A method of positioning, comprising the steps of:

the method comprises the steps that a control center receives first report information which is sent by a base station and receives a positioning request signal of a mobile terminal, wherein the first report information comprises identification information of the mobile terminal and identification information of the base station;

determining whether the transmitting power of a mobile terminal needs to be adjusted according to the received first report information sent by each base station;

if so, sending a transmitting power increasing instruction to the mobile terminal, and resending the positioning request signal after the mobile terminal increases the transmitting power according to the transmitting power increasing instruction;

further comprising the steps of:

receiving second report information sent by each base station when receiving a signal sent by a mobile terminal by adopting radio waves with a specified frequency, wherein the second report information comprises the specified frequency, field intensity and GPS geographic position information of the base station;

analyzing by adopting an urban radio wave propagation model according to the second report information of each base station, and establishing a radio wave field intensity distribution situation map;

the mobile terminal carries out positioning processing to determine the positioning position of the mobile terminal according to the sending time of sending the positioning request signal, the receiving time of receiving each positioning request response, the receiving time of the base station for receiving the positioning request signal and the received GPS geographical position information of each base station corresponding to each positioning request response;

and the mobile terminal judges whether the corresponding base stations are in weak situation areas in a radio wave field intensity distribution situation map or not according to the received GPS geographical position information in the positioning request response sent by each base station, and if so, the transmission power of the mobile terminal is adjusted.

7. The positioning method according to claim 6, wherein the manner of determining whether the transmission power of the mobile station needs to be adjusted according to the received first report information sent by each base station comprises any one of the following manners:

determining the number of base stations receiving the positioning request signals of the mobile terminal according to the received first report information sent by each base station; when the number is smaller than a preset base station number threshold value, judging that the transmitting power of the mobile terminal needs to be adjusted;

and judging whether each base station receiving the positioning request signal of the mobile terminal is in a weak situation area in a radio wave field intensity distribution situation map or not according to the received first report information, and if so, judging that the transmitting power of the mobile terminal needs to be adjusted.

8. A positioning system, comprising a mobile terminal, the mobile terminal comprising:

the signal transmitting module is used for transmitting a positioning request signal to the base station;

the positioning module is used for positioning and processing to determine the positioning position of the mobile terminal according to the sending time of sending the positioning request signal, the receiving time of receiving each positioning request response/the receiving time of the base station receiving the positioning request signal, and the received GPS geographic position information of each base station corresponding to each positioning request response;

the mobile terminal adjusting and analyzing module is used for determining whether the transmitting power needs to be adjusted according to the received positioning request response sent by each base station; the mobile terminal adjustment analysis module comprises a mobile terminal number determination module and/or a mobile terminal area determination module:

and the mobile terminal area determining module is used for judging whether each corresponding base station is in a weak situation area in a radio wave field intensity distribution situation map or not according to the received GPS geographical position information in the positioning request response sent by each base station, and if so, judging that the transmitting power of the mobile terminal needs to be adjusted.

9. The positioning system of claim 8, wherein: an instruction receiving module for receiving the instruction of the user,

the instruction receiving module is used for receiving a transmitting power increasing instruction sent by the control center;

the signal transmitting module is further configured to transmit a positioning request signal after the transmission power is increased according to the transmission power increase instruction or the analysis result of the mobile terminal adjustment analysis instruction.

10. A positioning system, comprising a base station detection end, the base station detection end comprising:

the signal receiving module is used for receiving a positioning request signal sent by the mobile terminal to the base station;

the signal response module is used for sending a positioning request response to the mobile terminal, wherein the positioning request response comprises GPS geographical position information of the base station, and the mobile terminal performs positioning calculation processing to determine the positioning position of the mobile terminal according to the sending time for sending the positioning request signal, the receiving time for receiving each positioning request response/the receiving time for receiving the positioning request signal by the base station and the received GPS geographical position information of each base station corresponding to each positioning request response;

and the control end region determining module is used for judging whether each corresponding base station is in a weak situation region in a radio wave field intensity distribution situation map or not according to the received GPS geographical position information in the positioning request response sent by each base station, and if so, adjusting the transmitting power of the mobile end.

11. The positioning system of claim 10, wherein:

the position information acquisition module comprises a GPS positioning module and is used for determining GPS geographical position information of the base station through satellite positioning;

the position information acquisition module comprises a local query module used for querying and acquiring GPS geographical position information of the base station from a local database of the base station;

the position information acquisition module comprises a GPS positioning module and a local query module;

the local query module is used for querying a local database of the base station to acquire the GPS geographic position information of the base station and sending a positioning instruction to the GPS positioning module when the query result shows that the GPS geographic position information does not exist;

the GPS positioning module is used for determining the GPS geographic position information of the base station through satellite positioning when receiving the positioning instruction of the local query module;

the position information acquisition module comprises a retrieval request module, a retrieval response receiving module, a GPS positioning module and a position information determination module:

a retrieval request module used for sending a retrieval request to a control center, wherein the retrieval request comprises the identification information of the base station, and the control center retrieves whether GPS geographic position information corresponding to the identification information exists in a database;

a retrieval response receiving module, configured to receive a retrieval response returned by the control center according to the retrieval request, where the retrieval response is determined by the control center according to a retrieval result of whether there is GPS geographic location information corresponding to the identification information retrieved from a database, and when the retrieval result is yes, the retrieval response includes the GPS geographic location information corresponding to the identification information retrieved from the database by the control center, and when the retrieval result is no, the retrieval response includes information that a base station needs to perform satellite positioning;

the GPS positioning module is used for determining the GPS geographic position information of the base station through satellite positioning;

and the position information determining module is used for determining the GPS geographical position information in the retrieval response as the GPS geographical position information of the base station when the retrieval response comprises the GPS geographical position information according to the retrieval response received by the retrieval response receiving module, sending a positioning instruction to the GPS positioning module when the retrieval response comprises the information that the base station needs to perform satellite positioning, and determining the GPS geographical position information of the base station through the GPS positioning module.

12. The positioning system of claim 11, further comprising:

and the position reporting module is used for sending the GPS geographical position information of the base station obtained by the GPS positioning module to the control center, and the control center stores the GPS geographical position information of the base station into the database.

13. A positioning system, comprising a control center side, the control center side comprising:

an instruction sending module, configured to send a transmission power increase instruction to the mobile terminal when a determination result of the control terminal adjustment analysis module is yes, where the mobile terminal increases transmission power according to the transmission power increase instruction and then resends the positioning request signal;

further comprising:

the distribution diagram establishing module is used for receiving second report information sent by each base station when receiving a signal sent by a mobile terminal by adopting radio waves with a specified frequency, wherein the second report information comprises the specified frequency, the field intensity and the GPS geographic position information of the base station, and is analyzed by adopting an urban radio wave propagation model according to the second report information of each base station to establish a radio wave field intensity distribution situation diagram;

the control end adjusting and analyzing module comprises a control end region determining module, and the control end region determining module is used for judging whether each base station receiving the positioning request signal of the mobile end is in a weak situation area in a radio wave field intensity distribution situation map or not according to the received first report information, and if so, judging that the transmitting power of the mobile end needs to be adjusted;

and the mobile terminal performs positioning processing to determine the positioning position of the mobile terminal according to the sending time of the positioning request signal, the receiving time of each positioning request response, the receiving time of the base station for receiving the positioning request signal and the received GPS geographic position information of each base station corresponding to each positioning request response.