CN103249138B - Localization method and device - Google Patents
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Abstract
The invention discloses a kind of localization method and device. Wherein, the method includes mobile terminal and measures in this cell base station and base station, peripheral cell the signal to noise ratio of signal in forward link pilot channel; The system banner of acquisition, network identity, this cell base station identification, PN code number that base station, peripheral cell uses and measured signal to noise ratio are uploaded to locating platform; Locating platform inquires about the longitude and latitude of serving BS according to system banner, network identity and this cell base station identification, the longitude and latitude according to the PN code number inquiry base station, peripheral cell that base station, peripheral cell uses; The weighter factor of each longitude and latitude is determined according to the signal to noise ratio measured; The longitude and latitude utilizing weighter factor and inquire determines the latitude and longitude information of mobile terminal. The present invention is without transforming network, and the requirement of mobile terminal is also low, is capable of high-precision location when not adopting specialized chip.
Description
Technical field
The present invention relates to mobile positioning technique field, especially, relate to a kind of localization method and device.
Background technology
Along with the development of mobile Internet and smart mobile phone, location service is considered the coming years will the explosive value-added service increased. Current mobile operator provides the business platform of stationkeeping ability mainly to have high accuracy and two kinds of locating platforms of low precision. The business platform providing high-precision fixed capability mainly adopts gpsOne technology, and this technology can provide high-precision positioning service, but need terminal to adopt and support gpsOne chip; And provide the business platform of low precision stationkeeping ability to adopt the chain of command targeting scheme based on PN4747 agreement, specifically, rough grade locating platform is by PN4747 protocol signaling and MSCe (MSCenhanced, enhancement mode MSC) interact, obtaining the serving BS residing for mobile terminal and sector number, then this latitude and longitude of base station information is exported by inquiry base station database as positioning result. What obtain due to which is single base station or sector auxiliary information, make to stand in side, base station and what stand in that this covering edge, base station obtains will be identical positioning result, therefore its precision depends on the wireless signal footprint size of base station or sector, is typically in about hundreds to thousands rice. Compared with the positional information that fine positioning algorithm obtains, its precision is much lower.
Owing to chip for cell phone is had particular/special requirement by gpsOne hi-Fix service, and platform technology and service limited ability are in specific company, and positioning precision that low precision platform provides is poor, higher business demand cannot be met, as can be seen here, these factors seriously limit the sound development of mobile location service.
Summary of the invention
The technical problem that the invention solves the problems that is to provide a kind of localization method and device, it is possible to provide the hi-Fix service of untethered for mobile terminal.
According to an aspect of the invention, it is proposed that a kind of localization method, measure the signal to noise ratio of the forward pilot signal that serving BS sends with peripheral base station including mobile terminal; The system banner got, network identity, serving BS mark, PN code number that peripheral base station uses and measured signal to noise ratio are uploaded to locating platform simultaneously;Locating platform inquires about the longitude and latitude of serving BS according to system banner, network identity and service Base Station Identification, the longitude and latitude according to the PN code number inquiry peripheral base station that peripheral base station uses; The weighter factor of each longitude and latitude is determined according to signal to noise ratio intensity size; The longitude and latitude utilizing weighter factor and inquire determines the latitude and longitude information of mobile terminal.
According to a further aspect in the invention, also proposed a kind of positioner, including the PN code number that information receiving unit, the signal to noise ratio of the forward pilot signal that the serving BS measured for receiving mobile terminal sends with peripheral base station and the system banner of acquisition for mobile terminal, network identity, serving BS mark and peripheral base station use; Longitude and latitude query unit, is connected with information receiving unit, the longitude and latitude for inquiring about the longitude and latitude of serving BS according to system banner, network identity and service Base Station Identification, according to the PN code number inquiry peripheral base station that peripheral base station uses; Weighter factor determines unit, is connected with information receiving unit, for determining the weighter factor of each longitude and latitude according to the signal to noise ratio measured; Longitude and latitude determines unit, determines that unit is connected with longitude and latitude query unit and weighter factor, and the longitude and latitude for utilizing weighter factor with inquire determines the latitude and longitude information of mobile terminal.
Localization method provided by the invention and device, based on the principle that the signal to noise ratio of pilot signal is inversely proportional to propagation distance, the signal to noise ratio size of the multiple base stations measured according to mobile terminal selects corresponding weighter factor, utilizes weighter factor and the longitude and latitude of the multiple base stations inquired determines the longitude and latitude of mobile terminal. The present invention is without transforming network, and the requirement of mobile terminal is also low, is capable of high-precision location when not adopting specialized chip.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application. In the accompanying drawings:
Fig. 1 is the schematic flow sheet of an embodiment of localization method of the present invention.
Fig. 2 is the schematic flow sheet of another embodiment of localization method of the present invention.
Fig. 3 is the schematic diagram of an example of mobile terminal measured location parameter of the present invention.
Fig. 4 illustrates the schematic diagram of an example of positioning service flow process of the present invention.
Fig. 5 is the structural representation of an embodiment of positioner of the present invention.
Fig. 6 is the structural representation of another embodiment of positioner of the present invention.
Fig. 7 is the structural representation of the another embodiment of positioner of the present invention.
Detailed description of the invention
With reference to the accompanying drawings the present invention is described more fully, the exemplary embodiment of the present invention is wherein described. The exemplary embodiment of the present invention and explanation thereof are used for explaining the present invention, but are not intended that inappropriate limitation of the present invention.
Description only actually at least one exemplary embodiment is illustrative below, never as any restriction to the present invention and application or use.
The principle that the pilot frequency intensity Ec/Io (embodying the intensity of received signal and the ratio of adjacent cell interference level) that the following embodiment of the present invention receives based on mobile terminal and propagation distance are inversely proportional to substantially, namely, the Ec/Io that mobile terminal receives is more strong, represent that this base station distance mobile terminal skip is near, Ec/Io intensity is more little, represent that this base station distance mobile terminal skip is remote, therefore can using the reference frame as setting weights of the Ec/Io intensity size, the position of mobile terminal is determined by the weighted average of the latitude and longitude information of each base station that mobile terminal is detected.
Fig. 1 is the schematic flow sheet of an embodiment of localization method of the present invention.
As it is shown in figure 1, this embodiment may comprise steps of:
S102, mobile terminal measures the signal to noise ratio of the forward pilot signal that serving BS sends with peripheral base station;
S104, SID (the SystemID that will obtain, system banner), NID (NetworkID, network identity), BASEID (BaseStationID, serving BS ID identifies), PN (PseudoNumber, the pseudo noise code) code number that uses of peripheral base station and measured signal to noise ratio be uploaded to locating platform;
S106, the locating platform longitude and latitude according to SID, NID and BASEID conjunctive query serving BS, the longitude and latitude according to the PN code number inquiry peripheral base station that peripheral base station uses;
Wherein, SID is used for identifying system, and generally with LAN (such as a city) for unit, NID is used for identifying network, several NID regions can be divided under LAN, SID, NID and BASEID therefore can be utilized jointly to determine the latitude and longitude information of serving BS;
S108, the weighter factor of each longitude and latitude is determined according to the signal to noise ratio measured, specifically, it is possible to compared in the signal to noise ratio interval of the signal to noise ratio measured Yu setting, the weighter factor corresponding with the signal to noise ratio measured is determined according to signal to noise ratio interval with the corresponding relation of weighter factor;
S110, utilizes weighter factor and the longitude and latitude that inquires to determine the latitude and longitude information of mobile terminal.
This embodiment embodies the localization method in a kind of user face, current hi-Fix can be broken away from and be limited to specific company (such as, high pass) problem, reduce the threshold of the mobile terminal using positioning service (namely, gpsOne chip is supported without mobile terminal), improve audience size and the business experience of positioning service.
Fig. 2 is the schematic flow sheet of another embodiment of localization method of the present invention.
As in figure 2 it is shown, this embodiment may comprise steps of:
S202, mobile terminal measures this community and the signal to noise ratio of signal in forward link pilot channel in peripheral cell, specifically, mobile terminal can follow the tracks of the pilot signal of multiple base station simultaneously, obtain periphery wireless environment: for serving BS, it is possible to obtain SID, NID, BASEID and PN (also known as scrambler, in order to distinguish different sectors by system message, span is 0-511), it is possible to measure the signal to noise ratio Ec/Io of pilot signal; For peripheral base station, it is possible to obtain the PN of these base stations and signal to noise ratio Ec/Io, Fig. 3 of pilot signal illustrates an instantiation;
S204, PN code number and signal to noise ratio that SID, NID and this community BASEID, the base station, peripheral cell of acquisition are used by mobile terminal are uploaded to locating platform;
S206, locating platform determines the base station participating in location Calculation according to signal-noise ratio threshold, specifically, the signal to noise ratio measured and signal-noise ratio threshold can be compared, select in the signal to noise ratio measured more than the signal to noise ratio of signal-noise ratio threshold for the follow-up location to mobile terminal, to reject the interference to positioning result of the useless base station, wherein, the setting of signal-noise ratio threshold is important, if threshold sets obtains too conference and reduces the number of base stations participating in location, thus affecting precision; If threshold sets is too low, the complexity of calculating can be enlarged markedly, and make some interference base stations useless also assist in location, illustrate, if choosing Ec/Io >=-22dB as thresholding, then at the example shown in Fig. 3, the latitude and longitude information choosing the base station of PN=416,300,344,176 is participated in the location Calculation of mobile terminal;
S208, locating platform according to SID, NID, this community BASEID inquire about the longitude and latitude of this cell base station, the longitude and latitude of the PN code number inquiry base station, peripheral cell used according to the base station, peripheral cell meeting signal-noise ratio threshold;
S210, determines the weighter factor of each longitude and latitude according to the signal to noise ratio meeting signal-noise ratio threshold;
Specifically, the signal to noise ratio interval of the signal to noise ratio Yu setting that meet signal-noise ratio threshold can be compared, determine the weighter factor corresponding with the signal to noise ratio meeting signal-noise ratio threshold according to signal to noise ratio interval with the corresponding relation of weighter factor, wherein, be directly proportional to weighter factor for the signal to noise ratio positioned, namely, signal to noise ratio is more big, and weighter factor is more big, for instance, signal to noise ratio can be divided into 5 intervals: interval [-22db ,-15db) corresponding weighter factor is 1; Interval [-15db ,-11db) corresponding weighter factor is 2; Interval [-11db ,-8db) corresponding weighter factor is 5; Interval [-8db ,-5db) corresponding weighter factor is 11; Interval [-5db, 0db) corresponding weighter factor is 17, in addition, weighter factor corresponding to the determination in signal to noise ratio interval and each interval can serve as configurable parameter on locating platform, rational value can be adjusted interval for signal to noise ratio with weighter factor with practical data, such that it is able to significantly improve the precision of location according to test;
S212, utilizes weighter factor and the longitude and latitude inquired to be weighted arithmetic average computing to determine the latitude and longitude information of mobile terminal, specifically, and the longitude of anchor point=all weighting longitude addition/weighting base stations number; The latitude of anchor point=all weighting latitude addition/weighting base stations number.
This embodiment can effectively reject useless interference information compared with the embodiment in Fig. 1, thus can significantly improve the positioning precision to mobile terminal.
It follows that further illustrated the localization method of mobile terminal by a more detailed embodiment:
Step one, mobile terminal measures the signal to noise ratio of the forward link pilot signal of the multiple base station of periphery (including Current Serving BTS and peripheral base station) (namely in position fixing process, Ec/Io), follow the tracks of the forward link pilot signal of the multiple base station of periphery, by base station broadcast message (such as, system parameters message, Neighboring Cell List message) obtain SID, NID, the BASEID of Current Serving BTS, No. PN of peripheral base station, and the SID of the Current Serving BTS by acquisition, NID, BASEID, No. PN of peripheral base station and the Ec/Io value measured are uploaded to positioner or locating platform by data channel, wherein, locating platform can be one and concentrate the platform built, such as, each province can build a positioning service to accept this province, can also only build a positioning service to accept the whole nation in the whole nation,
Step 2, locating platform can filter thresholding according to Ec/Io and select more than filtering thresholding (namely from all Ec/Io measured, signal-noise ratio threshold) Ec/Io (namely, base station with terminal location strong correlation) participate in following location Calculation, to reject the interference to location of the useless base station;
Step 3, locating platform determines the longitude and latitude of serving BS according to the BASEID of SID, NID and serving BS, according to peripheral base station No. PN inquires about base station database to determine the longitude and latitude of peripheral base station according to serving BS minimum distance principle (because PN exists multiplexed situation), wherein, base station database is arranged in locating platform, for depositing base station radio engineering parameter, mainly include the information such as longitude and latitude of SID, NID, BASEID, sector PN, carrier frequency, each base station;
Step 4, according to the size of Ec/Io in each PN pilot channel, gives corresponding weighter factor for each PN, wherein it is possible to adopt the mode of sectionally weighting, namely, it is divided into some sections according to intensity size, for the weights that segment assignments that intensity is bigger is bigger in specific Ec/Io strength range;
Step 5, utilizes the weighter factor that previous step produces, and the longitude and latitude of serving BS and peripheral base station is weighted average computation, obtains final positioning result, compared with simple average computation, it is possible to significantly improve positioning precision.
Fig. 4 illustrates the schematic diagram of an example of positioning service flow process of the present invention.
As shown in Figure 4, user starts the positioning function on mobile terminal, and application program gathers the wireless parameter of mobile phone, is connected to the Internet by 1X/EVDO data traffic channels, and the wireless parameter of mobile phone is reported locating platform, locating platform resolves the data received, inquiry base station database is to determine the latitude and longitude information of Serving cell, owing to being likely to find a plurality of latitude and longitude information corresponding for PN with in base station database, cause that terminal cannot judge have received the signal of which PN, minimum distance principle be exactly system can the longitude and latitude of the longitude and latitude of multiple base stations corresponding to this PN and serving BS (before according to SID, the BASEID of NID and serving BS has inquired about acquisition) carry out distance calculating, then take that closest base station and participate in location Calculation as adjacent base station, calculate longitude weighted arithmetic mean and the latitude weighted arithmetic mean of serving BS and adjacent base station respectively, finally obtain the latitude and longitude information of anchor point, latitude and longitude information is returned to terminal by locating platform.
One of ordinary skill in the art will appreciate that, realize the whole of said method embodiment to be completed by the hardware that programmed instruction is relevant with part steps, aforesaid program can be stored in a computing equipment read/write memory medium, this program is upon execution, perform to include the step of said method embodiment, and aforesaid storage medium can include the various media that can store program code such as ROM, RAM, magnetic disc and CD.
Fig. 5 is the structural representation of an embodiment of positioner of the present invention.
As it is shown in figure 5, the positioner 500 of this embodiment may include that
Information receiving unit 502, for receiving the PN code number that the signal to noise ratio of signal in forward link pilot channel in this cell service site and the base station, peripheral cell that mobile terminal is measured and the SID of acquisition for mobile terminal, NID, the BASEID of this cell base station and base station, peripheral cell use;
Longitude and latitude query unit 504, is connected with information receiving unit, for according to SID, NID, this cell base station BASEID inquire about the longitude and latitude of this cell base station, the longitude and latitude of the PN code number inquiry base station, peripheral cell used according to base station, peripheral cell;
Weighter factor determines unit 506, is connected with information receiving unit, for determining the weighter factor of each longitude and latitude according to the signal to noise ratio measured;
Longitude and latitude determines unit 508, determines that unit is connected with longitude and latitude query unit and weighter factor, and the longitude and latitude for utilizing weighter factor with inquire determines the latitude and longitude information of mobile terminal.
The principle that this embodiment is inversely proportional to based on signal to noise ratio and the propagation distance of pilot signal, the signal to noise ratio size of the multiple base stations measured according to mobile terminal selects corresponding weighter factor, utilizes weighter factor and the longitude and latitude of the multiple base stations inquired determines the longitude and latitude of mobile terminal. The present invention is without transforming network, and the requirement of mobile terminal is also low, is capable of high-precision location when not adopting specialized chip.
Fig. 6 is the structural representation of another embodiment of positioner of the present invention.
As shown in Figure 6, compared with the embodiment in Fig. 5, the positioner 600 of this embodiment can also include:
Signal to noise ratio comparing unit 602, determine that unit is connected with information receiving unit, longitude and latitude query unit and weighter factor, for the signal to noise ratio measured and signal-noise ratio threshold being compared, the signal to noise ratio measured selects the signal to noise ratio more than signal-noise ratio threshold for the location of mobile terminal.
Fig. 7 is the structural representation of the another embodiment of positioner of the present invention.
As it is shown in fig. 7, compared with the embodiment in Fig. 5, the weighter factor in the positioner 700 of this embodiment determines that unit 702 includes:
Subelement 7021 is compared in interval, for being compared in the signal to noise ratio interval of the signal to noise ratio measured Yu setting;
Determining subelement 7022, compare subelement with interval and be connected, for determining the weighter factor corresponding with the signal to noise ratio measured according to signal to noise ratio interval with the corresponding relation of weighter factor, wherein, the signal to noise ratio measured is directly proportional to weighter factor.
In this specification, each embodiment all adopts the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, and part identical with similar between each embodiment can cross-reference. For device embodiment, due to itself and embodiment of the method basic simlarity, so what describe is fairly simple, relevant part may refer to the explanation of embodiment of the method part.
Although some specific embodiments of the present invention being described in detail already by example, but it should be appreciated by those skilled in the art, above example is merely to illustrate, rather than in order to limit the scope of the present invention. It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above example be modified. The scope of the present invention be defined by the appended claims.
Claims (6)
1. a localization method, it is characterised in that including:
Mobile terminal measures the signal to noise ratio of the forward pilot signal that serving BS sends with peripheral base station;
The system banner of acquisition, network identity, serving BS mark, PN code number that peripheral base station uses and measured signal to noise ratio are uploaded to locating platform;
Described locating platform inquires about the longitude and latitude of serving BS, the PN code number used according to peripheral base station and the longitude and latitude with serving BS shortest distance principle inquiry peripheral base station according to system banner, network identity and service Base Station Identification;
Determine the weighter factor of each longitude and latitude according to the signal to noise ratio measured, wherein, the signal to noise ratio that described basis is measured determines that the step of the weighter factor of each longitude and latitude includes: compared in the signal to noise ratio interval of the signal to noise ratio measured Yu setting; Determine the weighter factor corresponding with the signal to noise ratio measured according to signal to noise ratio interval with the corresponding relation of weighter factor, wherein, be directly proportional to weighter factor for the signal to noise ratio positioned;
The longitude and latitude utilizing described weighter factor and inquire determines the latitude and longitude information of described mobile terminal.
2. localization method according to claim 1, it is characterised in that described method also includes:
The signal to noise ratio measured and signal-noise ratio threshold are compared, the signal to noise ratio measured selects the signal to noise ratio more than described signal-noise ratio threshold for the location of mobile terminal.
3. localization method according to claim 1, it is characterised in that described in the signal to noise ratio measured be directly proportional to weighter factor.
4. a positioner, it is characterised in that including:
The PN code number that information receiving unit, the signal to noise ratio of the forward pilot signal that the serving BS measured for receiving mobile terminal sends with peripheral base station and the system banner of acquisition for mobile terminal, network identity, serving BS mark and peripheral base station use;
Longitude and latitude query unit, it is connected with described information receiving unit, for the longitude and latitude according to system banner, network identity and service Base Station Identification inquiry serving BS, the PN code number used according to peripheral base station and the longitude and latitude with serving BS shortest distance principle inquiry peripheral base station;
Weighter factor determines unit, it is connected with described information receiving unit, for determining the weighter factor of each longitude and latitude according to the signal to noise ratio measured, wherein, described weighter factor determines that unit includes: subelement is compared in interval, for being compared in the signal to noise ratio interval of the signal to noise ratio measured Yu setting; Determine subelement, compare subelement with described interval and be connected, for determining the weighter factor corresponding with the signal to noise ratio measured according to signal to noise ratio interval with the corresponding relation of weighter factor, wherein, be directly proportional to weighter factor for the signal to noise ratio positioned;
Longitude and latitude determines unit, determines that unit is connected with described longitude and latitude query unit and described weighter factor, and the longitude and latitude for utilizing described weighter factor with inquire determines the latitude and longitude information of described mobile terminal.
5. positioner according to claim 4, it is characterised in that described device also includes:
Signal to noise ratio comparing unit, determine that unit is connected with described information receiving unit, described longitude and latitude query unit and described weighter factor, for the signal to noise ratio measured and signal-noise ratio threshold being compared, the signal to noise ratio measured selects the signal to noise ratio more than described signal-noise ratio threshold for the location of mobile terminal.
6. positioner according to claim 4, it is characterised in that described in the signal to noise ratio measured be directly proportional to weighter factor.
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| CN107645773A (en) * | 2017-09-20 | 2018-01-30 | 大唐融合通信无锡有限公司 | A kind of architecture data stabilization filter algorithm and system |
| CN110221246A (en) * | 2019-05-20 | 2019-09-10 | 北京航空航天大学 | A kind of unmanned plane localization method based on the fusion of multi-source direction finding message |
| CN111368556B (en) * | 2020-03-05 | 2024-03-26 | 深圳市腾讯计算机系统有限公司 | Performance determination method and confidence determination method and device of translation model |
| CN116600384B (en) * | 2023-07-17 | 2023-12-19 | 广州斯沃德科技有限公司 | Multi-base station positioning method, device, storage medium and system |
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| CN1812623A (en) * | 2005-01-27 | 2006-08-02 | 中兴通讯股份有限公司 | Method for positioning mobile station |
| CN101047983A (en) * | 2006-04-18 | 2007-10-03 | 华为技术有限公司 | Method for positioning moving platform |
| CN101965051A (en) * | 2010-09-28 | 2011-02-02 | 中兴通讯股份有限公司 | Positioning method and positioning server |
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| KR100727748B1 (en) * | 2005-11-29 | 2007-06-13 | (주) 엘지텔레콤 | Call Quality Analysis Method Using GPS Information in Mobile Communication Network |
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|---|---|---|---|---|
| CN1812623A (en) * | 2005-01-27 | 2006-08-02 | 中兴通讯股份有限公司 | Method for positioning mobile station |
| CN101047983A (en) * | 2006-04-18 | 2007-10-03 | 华为技术有限公司 | Method for positioning moving platform |
| CN101965051A (en) * | 2010-09-28 | 2011-02-02 | 中兴通讯股份有限公司 | Positioning method and positioning server |
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