CN103906228A - Mobile terminal base station differential positioning method, positioning device and system - Google Patents
Mobile terminal base station differential positioning method, positioning device and system Download PDFInfo
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Abstract
The invention discloses a mobile terminal base station differential positioning method. The method comprises the steps that a positioning device acquires one or more pieces of base station differential information matching a positioning request from a base station differential information database; the signal propagation time from a mobile terminal to a number of base stations, the signal propagation time difference of a number of base stations, or the signal intensity correction value of each base station is calculated; the positioning device uses the correction value to respectively correct each parameter; and the positioning device calculates the positioning information of the mobile terminal according to the corrected parameters. According to the mobile terminal base station differential positioning method, the positioning device and the system, which are provided by the invention, the multi base station information of one or more known positions is used to carry out differential correction on the multi base station information of an unknown position; a static error caused by dynamic errors of base station signal drift and the like and antenna feeder length and the like is eliminated; the positioning accuracy is improved; and a common terminal can be used to automatically collect differential data, which is convenient for implementation.
Description
Technical field
The present invention relates to mobile communication locating technology field, relate in particular to a kind of base station difference localization method, positioner and system of mobile terminal.
Background technology
At present, main multiple-base station positioning method comprises: TOA, TDOA etc., principle is the propagation time from base station to terminal room by measuring-signal, converses corresponding distance, then calculates the latitude and longitude coordinates of terminal according to multiple distances and known base station location.There is error to the signal propagation time measurement of terminal in base station, source comprises the phase drift of feeder length, base station signal etc., and the range measurement error causing can reach more than 100 meters, and error is transmitted to final positioning result.
At present, gpsOne system Dui Mei community adopts a FLC parameter to correct propagated error, but this parameter needs manual measurement, also unresolved dynamic drift problem.Many base stations fingerprint location needs data volume very large, can not cover Zone Full, and the fingerprint in same place also may cause error because of reasons such as the stabilization of equipment performance such as base station signal, terminal.
For this reason, need a kind of new mobile terminal locating method.
Summary of the invention
In view of this, the technical problem that the present invention will solve is to provide a kind of base station difference localization method of mobile terminal, carries out difference correction with many base station informations of known location.
A base station difference localization method for mobile terminal, comprising: the base station difference information that positioner mobile terminal receive is uploaded, is saved in base station difference information database by base station difference information; Wherein, described base station difference information comprises: the position coordinates of mobile terminal, mobile terminal are to the signal propagation time of at least one base station or signal propagation time is poor or mobile terminal receives the signal strength signal intensity of base station; The Location Request of described positioner mobile terminal receive, described Location Request comprises: mobile terminal is to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of multiple base stations; Described positioner obtains the one or more base station difference information matching with described Location Request from the difference information database of described base station, calculates described mobile terminal to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the corrected value of the signal strength signal intensity of multiple base stations; Described positioner use corrected value to the mobile terminal in described Location Request to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of multiple base stations is proofreaied and correct respectively; Described positioner arrives the signal propagation time of multiple base stations according to the mobile terminal after proofreading and correct or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of multiple base stations, and the position of described multiple base stations, calculates the locating information of mobile terminal.
According to one embodiment of the method for the invention, further, mobile terminal generates base station difference information, and described base station difference information comprises: gps coordinate, mobile terminal is to the signal propagation time of serving BS and one or more adjacent base stations or the signal propagation time of multiple adjacent base station and serving BS is poor or the signal strength signal intensity of serving BS and multiple adjacent base stations; Wherein, mobile terminal is in the time using gps satellite positioning service, measure mobile terminal to the signal propagation time of serving BS and one or more adjacent base stations, and obtain the signal strength signal intensity of the signal propagation time of multiple adjacent base stations and serving BS poor or serving BS and multiple adjacent base stations; Described Location Request comprises the signal strength signal intensity of mobile terminal or serving BS and multiple adjacent base stations poor to the signal propagation time of the signal propagation time of serving BS and one or more adjacent base stations, multiple adjacent base stations and described serving BS; Wherein, mobile terminal connects and the base station of service is provided is serving BS, the Wei Lin base station, other base stations that mobile terminal can measure.
According to one embodiment of the method for the invention, further, using serving BS and whether adjacent base station identical and the degree of closeness of signal propagation time difference as standard, described positioner obtains the one or more base station difference information matching with described Location Request from the difference information database of described base station; According to the position of the gps coordinate in the difference information of base station and serving BS, adjacent base station, calculate respectively multiple adjacent base stations and described serving BS the actual propagation time difference; Wherein, the signal propagation time difference in the difference information of corrected value=actual propagation time difference-base station; By each corrected value poor correction of signal propagation time to the multiple adjacent base station in described Location Request and described serving BS respectively.
According to one embodiment of the method for the invention, further, poor according to the signal propagation time of the multiple adjacent base station in the described Location Request after proofreading and correct and described serving BS, in conjunction with the position of serving BS, adjacent base station, by the difference algorithm time of advent, calculate the physical location of the mobile terminal that is positioned.
According to one embodiment of the method for the invention, further, using serving BS and mobile terminal whether identical with adjacent base station to serving BS and the degree of closeness of the signal propagation time of one or more adjacent base stations as standard, described positioner obtains the one or more base station difference information matching with described Location Request from the difference information database of described base station; Calculate respectively the signal true propagation time of mobile terminal to serving BS and one or more adjacent base stations according to the position of the gps coordinate in the difference information of base station and serving BS, adjacent base station; Wherein: the mobile terminal in the difference information of the true propagation time-base station of corrected value=signal is to the signal propagation time of serving BS and one or more adjacent base stations; Respectively the mobile terminal in described Location Request is proofreaied and correct to the signal propagation time of serving BS and one or more adjacent base stations by each corrected value.
According to one embodiment of the method for the invention, further, according to the mobile terminal in the described Location Request after proofreading and correct to the signal propagation time of serving BS and one or more adjacent base stations, in conjunction with the position of serving BS, adjacent base station, according to the algorithm time of advent, calculate the physical location of the terminal that is positioned.
In view of this, the technical problem that the present invention will solve is to provide a kind of positioner of mobile terminal, carries out difference correction with many base station informations of known location.
A kind of mobile terminal positioner, comprising: difference information receiving element, and the base station difference information of uploading for mobile terminal receive, is saved in base station difference information database by base station difference information; Wherein, described base station difference information comprises: the position coordinates of mobile terminal, mobile terminal are to the signal propagation time of at least one base station or signal propagation time is poor or mobile terminal receives the signal strength signal intensity of base station; Location Request receiving element, for the Location Request of mobile terminal receive, described Location Request comprises: mobile terminal is to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of multiple base stations; Correction values calculation unit, for obtaining from described base station difference information database the one or more base station difference information matching with described Location Request, calculate described mobile terminal to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the corrected value of the signal strength signal intensity of multiple base stations; Positional parameter correcting unit, for use corrected value to the mobile terminal of described Location Request to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of multiple base stations is proofreaied and correct respectively; Location Calculation unit, for according to the mobile terminal after proofreading and correct to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of multiple base stations, and the position of described multiple base stations, calculate the locating information of mobile terminal.
According to device of the present invention embodiment, further, mobile terminal generates base station difference information, and described base station difference information comprises: gps coordinate, mobile terminal is to the signal propagation time of serving BS and one or more adjacent base stations or the signal propagation time of multiple adjacent base station and serving BS is poor or the signal strength signal intensity of serving BS and multiple adjacent base stations; Wherein, mobile terminal is in the time using gps satellite positioning service, measure mobile terminal to the signal propagation time of serving BS and one or more adjacent base stations, and obtain the signal strength signal intensity of the signal propagation time of multiple adjacent base stations and serving BS poor or serving BS and multiple adjacent base stations; Described Location Request comprises the signal strength signal intensity of mobile terminal or serving BS and multiple adjacent base stations poor to the signal propagation time of the signal propagation time of serving BS and one or more adjacent base stations, multiple adjacent base stations and described serving BS; Wherein, mobile terminal connects and the base station of service is provided is serving BS, the Wei Lin base station, other base stations that mobile terminal can measure.
According to device of the present invention embodiment, further, using serving BS and whether adjacent base station identical and the degree of closeness of signal propagation time difference as standard, described correction values calculation unit is obtained the one or more base station difference information matching with described Location Request from the difference information database of described base station; Described correction values calculation unit is according to the position of the gps coordinate in the difference information of base station and serving BS, adjacent base station, calculate respectively multiple adjacent base stations and described serving BS the actual propagation time difference; Wherein, the signal propagation time difference in the difference information of corrected value=actual propagation time difference-base station; Described positional parameter correcting unit is by each corrected value poor correction of signal propagation time to the multiple adjacent base station in described Location Request and described serving BS respectively.
According to device of the present invention embodiment, further, described location Calculation unit is poor according to the signal propagation time of the multiple adjacent base station in the described Location Request after proofreading and correct and described serving BS, in conjunction with the position of serving BS, adjacent base station, by the difference algorithm time of advent, calculate the physical location of the mobile terminal that is positioned.
According to device of the present invention embodiment, further, using serving BS and mobile terminal whether identical with adjacent base station to serving BS and the degree of closeness of the signal propagation time of one or more adjacent base stations as standard, described positioner obtains the one or more base station difference information matching with described Location Request from the difference information database of described base station; Described correction values calculation unit calculates respectively the signal true propagation time of mobile terminal to serving BS and one or more adjacent base stations according to the position of the gps coordinate in the difference information of base station and serving BS, adjacent base station; Wherein: the mobile terminal in the difference information of the true propagation time-base station of corrected value=signal is to the signal propagation time of serving BS and one or more adjacent base stations; Described positional parameter correcting unit is proofreaied and correct to the signal propagation time of serving BS and one or more adjacent base stations the mobile terminal in described Location Request respectively by each corrected value.
According to device of the present invention embodiment, further, described location Calculation unit according to the mobile terminal in the described Location Request after proofreading and correct to the signal propagation time of serving BS and one or more adjacent base stations, in conjunction with the position of serving BS, adjacent base station, according to the algorithm time of advent, calculate the physical location of the terminal that is positioned.
Base station difference localization method, positioner and the system of mobile terminal of the present invention, many base station informations of unknown position are carried out to difference correction with many base station informations of one or more known location, thereby eliminate because dynamic error and the feeder length etc. such as base station signal drift cause static receiver error, promote positioning precision; And can utilize ordinary terminal automatically to gather differential data, without manual measurement, need data volume to be greatly less than fingerprint location, be convenient to implement.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is according to the flow chart of an embodiment of the base station difference localization method of mobile terminal of the present invention;
Fig. 2 is the principle schematic of the difference algorithm time of advent;
Fig. 3 is according to the flow chart of an embodiment of the base station difference localization method of mobile terminal of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.Below in conjunction with each figure and embodiment, technical scheme of the present invention is carried out to many-sided description.
Fig. 1 is according to the flow chart of an embodiment of the base station difference localization method of mobile terminal of the present invention.As shown in the figure:
According to one embodiment of present invention, mobile terminal is to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of multiple base stations is 3 kinds of parameters independently for location, can use separately and do location Calculation, also can integrate and do location Calculation.The parameter of 3 types can be carried out difference correction by the inventive method.
According to one embodiment of present invention, mobile terminal generates base station difference information, and base station difference information comprises: gps coordinate, mobile terminal is to the signal propagation time of serving BS and one or more adjacent base stations or the signal propagation time of multiple adjacent base station and serving BS is poor or the signal strength signal intensity of serving BS and multiple adjacent base stations.
Mobile terminal is in the time using gps satellite positioning service, measure mobile terminal to the signal propagation time of serving BS and one or more adjacent base stations, and obtain the signal strength signal intensity of the signal propagation time of multiple adjacent base stations and serving BS poor or serving BS and multiple adjacent base stations.
Location Request comprises the signal strength signal intensity of mobile terminal or serving BS and multiple adjacent base stations poor to the signal propagation time of the signal propagation time of serving BS and one or more adjacent base stations, multiple adjacent base station and serving BS; Wherein, mobile terminal connects and the base station of service is provided is serving BS, the Wei Lin base station, other base stations that mobile terminal can measure.
According to one embodiment of present invention, using serving BS and whether adjacent base station identical and the degree of closeness of signal propagation time difference as standard, positioner obtains the one or more base station difference information matching with Location Request from the difference information database of base station.According to the position of the gps coordinate in the difference information of base station and serving BS, adjacent base station, calculate respectively multiple adjacent base stations and serving BS the actual propagation time difference.
Signal propagation time difference in the difference information of corrected value=actual propagation time difference-base station.
By each corrected value poor correction of signal propagation time to the multiple adjacent base station in Location Request and serving BS respectively.
According to one embodiment of present invention, poor according to the signal propagation time of the multiple adjacent base station in the Location Request after proofreading and correct and serving BS, in conjunction with the position of serving BS, adjacent base station, by the difference algorithm time of advent, calculate the physical location of the mobile terminal that is positioned.
According to one embodiment of present invention, poor by signal propagation time and signal propagation time, can be converted into corresponding propagation distance.
Signal propagation time, is the time of signal in base station and terminal room propagation, is proportional to the distance of base station and terminal room.Signal propagation time is poor, is the propagation time difference of signal in different base station to 1 terminal.Or the propagation time difference of signal from 1 base station to multiple different terminals.
Basic skills to range difference that measure and 2 base stations is proofreaied and correct in this location: correction distance is poor=measuring distance is poor-corrected value, can eliminate the error of antenna feeder length, base station drift.The base station data of differential data and this location is close, and acquisition time is more close, and difference correction effect is better.Base station difference information, to the terminal of known location, by terminal or base station measurement to base station parameter, include but not limited to that signal propagation time or signal propagation time are poor, signal strength signal intensity etc.
For example, mobile communications network is cdma network, and Serving cell refers to that with website community the antenna of antenna and Serving cell is in the community of same position.In mobile communications network, common each base station location comprises the antenna of 3 or multiple directions, Xing community, a sector of each antenna cover.As the convention of mobile communication, in the time of terminal communication, be connected with terminal that the base station of service is provided is serving BS, other base stations that terminal can be observed are called adjacent base station.
According to one embodiment of present invention, the base station difference localization method of the mobile terminal in cdma network is as follows, and mobile terminal wherein can be referred to as terminal:
1, terminal is uploaded gps coordinate, base station parameter, remains to base station difference information database.
Terminal is common user terminal, user is in the time using gps satellite positioning service, applications client is carried out base station parameter measurement simultaneously, in the time communicating by letter with service end, upper report locating platform together with the base station parameter that gps coordinate is measured with terminal, the gps coordinate that locating platform reports this time and base station parameter, as a base station differential data, remain in difference information database.
Terminal can be also special differential data acquisition terminal, is arranged on ad-hoc location, for example, can be arranged on side, base station, and its position coordinates is identical with base station.This terminal is regularly carried out the measurement of peripheral base station parameter, says that measurement result is reported to locating platform, and the coordinate of this base station and the base station parameter that reports are saved as a base station difference information by locating platform.Can there be many base station difference informations in same place.
The base station differential data that reference terminal 1 reports comprises that signal propagation time is poor, signal strength signal intensity.Complete base station difference information record comprises as the field in following table 1:
Table 1-base station difference information record
Signal propagation time is poor, is signal arrives reference terminal propagation time difference in serving BS and 1/Lin base station, adjacent base station 2.
In cdma network, the time difference (signal propagation time is poor) that can measure, its unit is 1/16CDMA chip, is multiplied by the speed (light velocity) of radio signal propagation, can be converted into the range difference of terminal to serving BS and adjacent base station, each unit is equivalent to approximately 15 meters.
Table 1 comprises the base station differential data that 2 reference terminals send, and is gathered respectively by reference terminal 1 and reference terminal 2.Base station difference information table can also comprise the time of collection.
2, locating platform receives Location Request, comprises one or more base station parameters that terminal measures and includes but not limited to that signal propagation time, signal propagation time are poor, signal strength information.
In the time that the terminal that is positioned is positioned, initiate a Location Request, locating platform receives Location Request, in this request, comprises the poor and signal strength information of the signal propagation time of 3 base stations that the terminal that is positioned measures.As following table 2.
Table the 2-poor and signal strength information of signal propagation time that terminal measures that is positioned
As known from Table 2, the terminal that is positioned relative time is poor is (12,2), according to the setting of CDMA, and the poor propagation time × light velocity that is equivalent to of time per unit, per unit is equivalent to approximately 14.6 meters.
The position of base station 5475, adjacent base station PN428, PN260 is known, and according to the location algorithm of existing base station time difference, calculating hyperbola intersection point can be determined the position of terminal.
3, from the difference information database of base station, obtain the one or more base station difference information matching with current request.
Identical with adjacent base station as Condition Matching using serving BS, the record that gets 2 base station difference informations that reference terminal 1, reference terminal 2 collect from differential data storehouse, base station, reference terminal 1, corresponding time difference of reference terminal 2 are respectively (18,5), (2,17).
Because the time difference parameter (12,2) measuring in Article 1 record and this location is more approaching, therefore, the Article 1 base station difference information of selecting reference terminal 1 to send is proofreaied and correct.
4, utilize base station difference information, the parameters such as each base station time difference, signal strength signal intensity in current request base station information are carried out to difference correction.
Correction distance is poor=and measuring distance is poor-corrected value, can eliminate the error of antenna feeder length, base station drift.
The method of proofreading and correct with Article 1 base station difference information (18,5) is as follows:
Because the position (gps data) of the position (gps data) of the reference terminal 1 of this record and serving BS, adjacent base station is all known, according to the actual range of terminal and base station, can converse actual propagation time difference, the time difference conversing in the present embodiment is (16,8), therefore corrected value:
Time difference 1 corrected value=16-18=-2;
Time difference 2 corrected values=8-5=3;
The time difference (12,2) of the measurement result to this location proofreaies and correct, and proofreaies and correct result to be:
Time difference 1 '=12+ time difference 1 corrected value=12-2=10
Time difference 2 '=12+ time difference 2 corrected values=2+3=5
Therefore the time difference after proofreading and correct is (10,5).
5, with the base station parameter after proofreading and correct, calculate by location algorithm completing place.
With the time difference (10,5) after proofreading and correct and 3 base stations of known location, can, by existing digital (hyperbola intersection point) algorithm or other location algorithms, calculate the physical location of the terminal that is positioned.Also can say that to this location one or more time difference informations that measure proofread and correct respectively with many base station differential datas.
According to one embodiment of present invention, can also be with many base station difference informations, the parameter such as poor or signal strength signal intensity is at the same time carried out to composed correction, make to proofread and correct result by statistical average more reliable.
Because the time difference parameter after proofreading and correct is more accurate, can combine the advantage of triangle location and fingerprint location, carry out difference correction by utilizing from the historical data gathering.
Fig. 2 is the principle schematic of the difference algorithm time of advent.
TDOA(is poor the time of advent) be a kind of wireless location technology, the time difference that receives signal with multiple base stations is determined location of mobile station, arrive the time difference of two base stations by detection signal, instead of the absolute time arriving is determined and the position of travelling carriage has been reduced time synchronized requirement.As shown in Figure 2: adopt three different base stations can measure two TDOA, mobile terminal is positioned on the hyp intersection point of two TDOA decisions.
According to one embodiment of present invention, TOA (time of advent) locate mode, arrives time of base station by detection signal, determines that travelling carriage arrives the distance and position of base station.For example, detection signal arrives the time of 2 base stations, and calculates respectively the distance of two base stations of mobile terminal arrival, can determine that mobile terminal is positioned on the intersection point of two curves centered by two base stations.
According to one embodiment of present invention, using serving BS and mobile terminal whether identical with adjacent base station to serving BS and the degree of closeness of the signal propagation time of one or more adjacent base stations as standard, positioner obtains the one or more base station difference information matching with Location Request from the difference information database of base station.
Calculate respectively the signal true propagation time of mobile terminal to serving BS and one or more adjacent base stations according to the position of the gps coordinate in the difference information of base station and serving BS, adjacent base station.Wherein:
Mobile terminal in the difference information of the true propagation time-base station of corrected value=signal is to the signal propagation time of serving BS and one or more adjacent base stations.
Respectively the mobile terminal in Location Request is proofreaied and correct to the signal propagation time of serving BS and one or more adjacent base stations by each corrected value.
According to one embodiment of present invention, according to the mobile terminal in the Location Request after proofreading and correct to the signal propagation time of serving BS and one or more adjacent base stations, in conjunction with the position of serving BS, adjacent base station, according to the algorithm time of advent, calculate the physical location of the terminal that is positioned.
Fig. 3 is according to the flow chart of an embodiment of the base station difference localization method of mobile terminal of the present invention.As shown in Figure 3: mobile terminal positioner 31 comprises: difference information receiving element 311, Location Request receiving element 312, correction values calculation unit 313, positional parameter correcting unit and location Calculation unit.
The base station difference information that difference information receiving element 311 mobile terminal receives 32,33 are uploaded, is saved in base station difference information database by base station difference information.Base station difference information comprises: the gps coordinate of mobile terminal 32,33, mobile terminal 32,33 is to the signal propagation time of multiple base stations and the signal propagation time of multiple base stations is poor, the signal strength signal intensity of each base station.
The Location Request of Location Request receiving element 312 mobile terminal receives 34, Location Request comprises: mobile terminal 34 is to the signal propagation time of multiple base stations and the signal propagation time of multiple base stations is poor or the signal strength signal intensity of each base station.
Correction values calculation unit 313 is obtained the one or more base station difference information matching with Location Request from the difference information database of base station, calculates mobile terminal 34 to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the corrected value of the signal strength signal intensity of each base station.
Positional parameter correcting unit 314 uses corrected value not proofread and correct to the signal propagation time of multiple base stations or the signal propagation time difference of multiple base stations the mobile terminal 34 in Location Request.
Location Calculation unit 315 arrives the signal propagation time of multiple base stations according to the mobile terminal 34 after proofreading and correct or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of each base station, and the position of multiple base stations, calculates the locating information of mobile terminal.
According to one embodiment of present invention, mobile terminal 32,33 generates base station difference informations, and base station difference information comprises: gps coordinate, mobile terminal are poor to the signal propagation time of the signal propagation time of serving BS 35 and one or more adjacent base station 36,37, multiple adjacent base station 36,37 and serving BS 35.
Mobile terminal 32,33, in the time using gps satellite positioning service, is measured the signal propagation time of mobile terminal 34 to serving BS 35 and one or more adjacent base station 36,37, and it is poor to obtain the signal propagation time of multiple adjacent base stations 36,37 and serving BS 35.
Location Request comprises that mobile terminal 34 is poor to the signal propagation time of serving BS 35 and the signal propagation time of one or more adjacent base station 36,37, multiple adjacent base station 36,37 and serving BS 35.Mobile terminal connects and the base station of service is provided is serving BS, the Wei Lin base station, other base stations that mobile terminal can measure.
According to one embodiment of present invention, using serving BS and whether adjacent base station identical and the degree of closeness of signal propagation time difference as standard, correction values calculation unit 313 is obtained the one or more base station difference information matching with Location Request from the difference information database of base station.
Correction values calculation unit 313 is according to the position of the gps coordinate in the difference information of base station and serving BS, adjacent base station, calculate respectively multiple adjacent base stations and serving BS the actual propagation time difference.
Signal propagation time difference in the difference information of corrected value=actual propagation time difference-base station.
Positional parameter correcting unit 314 is by each corrected value poor correction of signal propagation time to the multiple adjacent base station in Location Request and serving BS respectively.
According to one embodiment of present invention, location Calculation unit 315 is poor according to the signal propagation time of the multiple adjacent base station in the Location Request after proofreading and correct and serving BS, in conjunction with the position of serving BS, adjacent base station, by the difference algorithm time of advent, calculate the physical location of the mobile terminal that is positioned.
According to one embodiment of present invention, using serving BS and mobile terminal whether identical with adjacent base station to serving BS and the degree of closeness of the signal propagation time of one or more adjacent base stations as standard, correction values calculation unit 313 is obtained the one or more base station difference information matching with Location Request from the difference information database of base station.
Correction values calculation unit 313 calculates respectively the signal true propagation time of mobile terminal to serving BS and one or more adjacent base stations according to the position of the gps coordinate in the difference information of base station and serving BS, adjacent base station.
Mobile terminal in the difference information of the true propagation time-base station of corrected value=signal is to the signal propagation time of serving BS and one or more adjacent base stations.
Positional parameter correcting unit 314 is proofreaied and correct to the signal propagation time of serving BS and one or more adjacent base stations the mobile terminal in Location Request respectively by each corrected value.
According to one embodiment of present invention, location Calculation unit 315 according to the mobile terminal in the Location Request after proofreading and correct to the signal propagation time of serving BS and one or more adjacent base stations, in conjunction with the position of serving BS, adjacent base station, according to the algorithm time of advent, calculate the physical location of the terminal that is positioned.
Base station difference localization method, positioner and the system of mobile terminal of the present invention, the information such as the time difference of terminal while reporting base station in the time carrying out GPS location, are recorded in differential data storehouse; In the time that other-end carries out many architectures, obtain many base station informations the most close in differential data storehouse, many base station informations of unknown position are carried out to difference correction with many base station informations of one or more known location, thereby eliminate because dynamic error and the feeder length etc. such as base station signal drift cause static receiver error, promote positioning precision; And can utilize ordinary terminal automatically to gather differential data, without manual measurement, need data volume to be greatly less than fingerprint location, be convenient to implement.
Terminal is the terminal equipment that can communicate by mobile communications network, and mobile communications network includes but not limited to WCDMA, CDMA, TD-CDMA, WiFi, LTE etc., includes but not limited to 2G, 3G, 4G mobile network.
The present invention compared with prior art has obvious advantage and beneficial effect:
1, take the lead in proposing the difference method (had in the past differential GPS, but have no the report of difference base station location) of architecture, with common automatic collection differential data storehouse; The method of proofreading and correct with differential data.
2, combine the advantage of triangle location and fingerprint matching location, carry out difference correction by utilizing from the historical data gathering, make positioning result more accurate, easily implement;
May realize in many ways method and system of the present invention.For example, can realize method and system of the present invention by any combination of software, hardware, firmware or software, hardware, firmware.The said sequence that is used for the step of method is only in order to describe, and the step of method of the present invention is not limited to above specifically described order, unless otherwise specified.In addition, in certain embodiments, can be also the program being recorded in recording medium by the invention process, these programs comprise the machine readable instructions for realizing the method according to this invention.Thereby the present invention also covers the recording medium of storing the program for carrying out the method according to this invention.
Description of the invention provides for example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the present invention's design to be suitable for the various embodiment with various amendments of special-purpose.
Claims (13)
1. a base station difference localization method for mobile terminal, is characterized in that, comprising:
The base station difference information that positioner mobile terminal receive is uploaded, is saved in base station difference information database by base station difference information; Wherein, described base station difference information comprises: the position coordinates of mobile terminal, mobile terminal are to the signal propagation time of at least one base station or signal propagation time is poor or mobile terminal receives the signal strength signal intensity of base station;
The Location Request of described positioner mobile terminal receive, described Location Request comprises: mobile terminal is to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of multiple base stations;
Described positioner obtains the one or more base station difference information matching with described Location Request from the difference information database of described base station, calculates described mobile terminal to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the corrected value of the signal strength signal intensity of multiple base stations;
Described positioner use corrected value to the mobile terminal in described Location Request to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of multiple base stations is proofreaied and correct respectively;
Described positioner arrives the signal propagation time of multiple base stations according to the mobile terminal after proofreading and correct or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of multiple base stations, and the position of described multiple base stations, calculates the locating information of mobile terminal.
2. the method for claim 1, is characterized in that:
Mobile terminal generates base station difference information, and described base station difference information comprises: gps coordinate, mobile terminal is to the signal propagation time of serving BS and one or more adjacent base stations or the signal propagation time of multiple adjacent base station and serving BS is poor or the signal strength signal intensity of serving BS and multiple adjacent base stations;
Wherein, mobile terminal is in the time using gps satellite positioning service, measure mobile terminal to the signal propagation time of serving BS and one or more adjacent base stations, and obtain the signal strength signal intensity of the signal propagation time of multiple adjacent base stations and serving BS poor or serving BS and multiple adjacent base stations;
Described Location Request comprises the signal strength signal intensity of mobile terminal or serving BS and multiple adjacent base stations poor to the signal propagation time of the signal propagation time of serving BS and one or more adjacent base stations, multiple adjacent base stations and described serving BS;
Wherein, mobile terminal connects and the base station of service is provided is serving BS, the Wei Lin base station, other base stations that mobile terminal can measure.
3. method as claimed in claim 2, is characterized in that:
Using serving BS and whether adjacent base station identical and the degree of closeness of signal propagation time difference as standard, described positioner obtains the one or more base station difference information matching with described Location Request from the difference information database of described base station;
According to the position of the gps coordinate in the difference information of base station and serving BS, adjacent base station, calculate respectively multiple adjacent base stations and described serving BS the actual propagation time difference; Wherein,
Signal propagation time difference in the difference information of corrected value=actual propagation time difference-base station;
By each corrected value poor correction of signal propagation time to the multiple adjacent base station in described Location Request and described serving BS respectively.
4. method as claimed in claim 3, is characterized in that:
Poor according to the signal propagation time of the multiple adjacent base station in the described Location Request after proofreading and correct and described serving BS, in conjunction with the position of serving BS, adjacent base station, by the difference algorithm time of advent, calculate the physical location of the mobile terminal that is positioned.
5. method as claimed in claim 2, is characterized in that:
Using serving BS and mobile terminal whether identical with adjacent base station to serving BS and the degree of closeness of the signal propagation time of one or more adjacent base stations as standard, described positioner obtains the one or more base station difference information matching with described Location Request from the difference information database of described base station;
Calculate respectively the signal true propagation time of mobile terminal to serving BS and one or more adjacent base stations according to the position of the gps coordinate in the difference information of base station and serving BS, adjacent base station; Wherein:
Mobile terminal in the difference information of the true propagation time-base station of corrected value=signal is to the signal propagation time of serving BS and one or more adjacent base stations;
Respectively the mobile terminal in described Location Request is proofreaied and correct to the signal propagation time of serving BS and one or more adjacent base stations by each corrected value.
6. method as claimed in claim 5, is characterized in that:
To the signal propagation time of serving BS and one or more adjacent base stations, in conjunction with the position of serving BS, adjacent base station, according to the algorithm time of advent, calculate the physical location of the terminal that is positioned according to the mobile terminal in the described Location Request after proofreading and correct.
7. a mobile terminal positioner, is characterized in that, comprising:
Difference information receiving element, the base station difference information of uploading for mobile terminal receive, is saved in base station difference information database by base station difference information; Wherein, described base station difference information comprises: the position coordinates of mobile terminal, mobile terminal are to the signal propagation time of at least one base station or signal propagation time is poor or mobile terminal receives the signal strength signal intensity of base station;
Location Request receiving element, for the Location Request of mobile terminal receive, described Location Request comprises: mobile terminal is to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of multiple base stations;
Correction values calculation unit, for obtaining from described base station difference information database the one or more base station difference information matching with described Location Request, calculate described mobile terminal to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the corrected value of the signal strength signal intensity of multiple base stations;
Positional parameter correcting unit, for use corrected value to the mobile terminal of described Location Request to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of multiple base stations is proofreaied and correct respectively;
Location Calculation unit, for according to the mobile terminal after proofreading and correct to the signal propagation time of multiple base stations or the signal propagation time of multiple base stations is poor or the signal strength signal intensity of multiple base stations, and the position of described multiple base stations, calculate the locating information of mobile terminal.
8. device as claimed in claim 7, is characterized in that:
Mobile terminal generates base station difference information, and described base station difference information comprises: gps coordinate, mobile terminal is to the signal propagation time of serving BS and one or more adjacent base stations or the signal propagation time of multiple adjacent base station and serving BS is poor or the signal strength signal intensity of serving BS and multiple adjacent base stations;
Wherein, mobile terminal is in the time using gps satellite positioning service, measure mobile terminal to the signal propagation time of serving BS and one or more adjacent base stations, and obtain the signal strength signal intensity of the signal propagation time of multiple adjacent base stations and serving BS poor or serving BS and multiple adjacent base stations;
Described Location Request comprises the signal strength signal intensity of mobile terminal or serving BS and multiple adjacent base stations poor to the signal propagation time of the signal propagation time of serving BS and one or more adjacent base stations, multiple adjacent base stations and described serving BS;
Wherein, mobile terminal connects and the base station of service is provided is serving BS, the Wei Lin base station, other base stations that mobile terminal can measure.
9. device as claimed in claim 8, is characterized in that:
Using serving BS and whether adjacent base station identical and the degree of closeness of signal propagation time difference as standard, described correction values calculation unit is obtained the one or more base station difference information matching with described Location Request from the difference information database of described base station;
Described correction values calculation unit is according to the position of the gps coordinate in the difference information of base station and serving BS, adjacent base station, calculate respectively multiple adjacent base stations and described serving BS the actual propagation time difference; Wherein,
Signal propagation time difference in the difference information of corrected value=actual propagation time difference-base station;
Described positional parameter correcting unit is by each corrected value poor correction of signal propagation time to the multiple adjacent base station in described Location Request and described serving BS respectively.
10. device as claimed in claim 9, is characterized in that:
Described location Calculation unit is poor according to the signal propagation time of the multiple adjacent base station in the described Location Request after proofreading and correct and described serving BS, in conjunction with the position of serving BS, adjacent base station, by the difference algorithm time of advent, calculate the physical location of the mobile terminal that is positioned.
11. devices as claimed in claim 8, is characterized in that:
Using serving BS and mobile terminal whether identical with adjacent base station to serving BS and the degree of closeness of the signal propagation time of one or more adjacent base stations as standard, described positioner obtains the one or more base station difference information matching with described Location Request from the difference information database of described base station;
Described correction values calculation unit calculates respectively the signal true propagation time of mobile terminal to serving BS and one or more adjacent base stations according to the position of the gps coordinate in the difference information of base station and serving BS, adjacent base station; Wherein:
Mobile terminal in the difference information of the true propagation time-base station of corrected value=signal is to the signal propagation time of serving BS and one or more adjacent base stations;
Described positional parameter correcting unit is proofreaied and correct to the signal propagation time of serving BS and one or more adjacent base stations the mobile terminal in described Location Request respectively by each corrected value.
12. devices as claimed in claim 11, is characterized in that:
Described location Calculation unit according to the mobile terminal in the described Location Request after proofreading and correct to the signal propagation time of serving BS and one or more adjacent base stations, in conjunction with the position of serving BS, adjacent base station, according to the algorithm time of advent, calculate the physical location of the terminal that is positioned.
13. 1 kinds of mobile communication system, is characterized in that:
Comprise the mobile terminal positioner as described in claim 7 to 12 any one.
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