CN100493066C - Optimized mobile platform positioning and selecting method - Google Patents
Optimized mobile platform positioning and selecting method Download PDFInfo
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Abstract
The method includes following steps: a) the mobile station receives the positioning request from core network and begins the process for selecting positioning method; b) a service performance figure, the current processor occupancy in the positioning center of mobile station and the location ability of the positioned mobile station are obtained; c) deciding if the horizontal positioning precision in service performance of positioning request is as low and the location response time is as fast, if yes, then entering to the step d, if not, then entering to the step e; d) no positioning method is selected, the center of reference cell where the positioned mobile station is at is taken as final location result, ending the process for selecting positioning method; deciding if the current processor occupancy in the positioning center of mobile station is over a certain threshold K, if yes, then entering to the process for selecting positioning method based on mobile station mode, otherwise entering to the process for selecting positioning method based on auxiliary mode of mobile station.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to the mobile position estimation field in the WCDMA system.
Background of invention
In UE (travelling carriage) position fixing process, SMLC (mobile position estimation center) is after receiving the Location Request of core net, need to consider how to realize the desired QoS of core net (service quality), that is: SMLC need select suitable localization method to finish mobile position estimation according to QoS.The QoS that mobile position estimation is relevant mainly contains following two factors: horizontal location precision, location response time.
SMLC is from receiving the Location Request of core net, to the whole localization process process that sends position message to core net as shown in Figure 1.SMLC at first receives the Location Request of core net; Then, select a kind of suitable localization method; According to selected localization method, finish corresponding position fixing process, position fixing process comprises: finish location survey and location Calculation etc.; At last, SMLC sends the positioning result that it obtains to core net.
The localization method system of selection is one of method relatively more crucial in the whole position fixing process of SMLC.Localization method is in case determine that SMLC just can initiate corresponding location survey according to localization method, and calls corresponding location estimation method and finish follow-up position fixing process.
Existing localization method system of selection is general only determines localization method according to the Location Request of core net, do not consider the influence that the current factors such as processor load in the stationkeeping ability of UE or mobile position estimation center are selected localization method, its shortcoming is the support that selected localization method may can not get the UE stationkeeping ability, perhaps can not get the support of network positions ability, thereby cause waste of network resources, and the increase of localization process time.
Summary of the invention
Shortcoming by prior art, the present invention proposes a kind of system of selection of optimized mobile station localization method, this method is by taking all factors into consideration multiple location correlative factor, as: the stationkeeping ability of the processor load at the response time requirement in the Location Request, the horizontal location required precision in the Location Request, mobile position estimation center, the travelling carriage that is positioned etc., select a kind of localization method that can better satisfy the QoS that is asked automatically.
A kind of system of selection of optimized mobile station localization method is characterized in that may further comprise the steps:
A: core net issues Location Request to the mobile position estimation center;
B: the mobile position estimation center obtains the Service Quality Metrics of Location Request, the processor occupancy that the mobile position estimation center is current and the stationkeeping ability of the travelling carriage that is positioned, wherein, the Service Quality Metrics of described Location Request comprises horizontal location precision and location response time, in the Location Request that core net issues, do not comprise the horizontal accuracy cell, or, comprise horizontal accuracy cell and horizontal location precision covering radius in the Location Request that core net issues more than or equal to the reference cell under the travelling carriage, putting horizontal accuracy is: low, in the Location Request that core net issues, comprise location response time cell, then put the location response time and be: be fast;
C: if in the service quality of Location Request, the horizontal location precision is low and the location response time is fast, then changes steps d over to; Otherwise change step e over to;
D: with the center of the residing reference cell of travelling carriage that is positioned, as final positioning result; Finish localization method and select flow process;
E: judge whether the current processor occupancy in mobile position estimation center surpasses certain thresholding K, if then change over to based on the localization method of travelling carriage pattern and select flow process; Otherwise the localization method that changes the travelling carriage auxiliary mode over to is selected flow process.
Among the described step e, the span of thresholding K is: 65% to 75%.
The stationkeeping ability that obtains the travelling carriage that is positioned among the described step b comprises:
If the mobile position estimation center obtains the failure of mobile position estimation ability, then put the observed time difference localization method UE based OTDOA supported that whether supports based on travelling carriage and be: do not support; Put and whether support which kind of property of network auxiliary global positioning system localization method Network Assisted GPS support to be: do not support; Whether putting the transmitting-receiving time difference type 2 of supports mobile measures Support for Rx-Tx time difference type2measurement and is: do not support; Otherwise, the stationkeeping ability of putting travelling carriage the mobile position estimation ability that obtains by the mobile position estimation center of success.
Among the described step e, select flow process further to comprise based on the localization method of travelling carriage pattern:
Step g 1: whether the stationkeeping ability of judging travelling carriage supports the property of network auxiliary global positioning system UE based A-GPS localization method based on travelling carriage, if then change step g 2 over to; Otherwise, change step g 5 over to;
Step g 2: whether the stationkeeping ability of judging travelling carriage supports the observed time difference UEbased OTDOA localization method based on travelling carriage, if then change step g 3 over to; Otherwise, change step g 4 over to;
Step g 3: localization method is chosen as hybrid locating method based on travelling carriage; Finish localization method and select flow process; Wherein, represent that based on the hybrid locating method of travelling carriage station-keeping mode is: based on travelling carriage, and the mobile position estimation center will comprehensively use observed time difference OTDOA or property of network auxiliary global positioning system A-GPS method to obtain the hi-Fix result;
Step g 4: localization method is chosen as UE based A-GPS localization method; Finish localization method and select flow process;
Step g 5: whether the stationkeeping ability of judging travelling carriage supports UE based OTDOA localization method, if then change step g 6 over to; Otherwise, change step g 7 over to;
Step g 6: localization method is chosen as UE based OTDOA localization method; Finish localization method and select flow process;
Step g 7: the stationkeeping ability of the judging travelling carriage whether transmitting-receiving time difference type 2 of supports mobile is measured, if then change step g 8 over to; Otherwise, change step g 9 over to;
Step g 8: localization method is chosen as cell ID UE based CELL ID localization method based on travelling carriage; Finish localization method and select flow process;
Step g 9: with the center of the residing reference cell of travelling carriage that is positioned, as final positioning result; Finish localization method and select flow process.
In the described step g 1, judge whether the stationkeeping ability of travelling carriage supports the judgment criterion of UE based A-GPS localization method to be:
Whether the Network Assisted GPS support part in the stationkeeping ability of inquiry travelling carriage is: based on mobile station UE based or not only support Network Based but also support based on travelling carriage, if, then show this travelling carriage support UE based A-GPS localization method, otherwise for not supporting.
Among the described step e, the localization method of travelling carriage auxiliary mode selects flow process further to comprise:
Step f1: whether the stationkeeping ability of judging travelling carriage supports based on network property of network auxiliary global positioning system Network based A-GPS localization method, if then change step f2 over to; Otherwise, change step f3 over to;
Step f2: localization method is chosen as the auxiliary hybrid locating method of travelling carriage; Finish localization method and select flow process; Wherein, the auxiliary hybrid locating method of travelling carriage represents that station-keeping mode is: travelling carriage is auxiliary, and the mobile position estimation center will comprehensively use OTDOA or A-GPS method to obtain the hi-Fix result;
Step f3: localization method is chosen as the auxiliary observed time difference UE assisted OTDOA localization method of travelling carriage; Finish localization method and select flow process.
Among the described step f1, judge whether the stationkeeping ability of travelling carriage supports the judgment criterion of Network based A-GPS localization method to be:
Whether the Network Assisted GPS support part in the stationkeeping ability of inquiry travelling carriage is: Network based Network Based or not only support Network Based but also support based on travelling carriage, if, then show this travelling carriage support Network based GPS localization method, otherwise for not supporting.This method can be according to the Location Request of core net, in conjunction with the current processor load in mobile position estimation center and the multiple correlative factors such as stationkeeping ability of the travelling carriage that is positioned, automatically select suitable localization method, with the best location qos requirement that satisfies core net, can avoid the waste of wireless transmission resources simultaneously again.
Description of drawings
Fig. 1: SMLC (mobile position estimation center) localization process process schematic diagram;
Fig. 2: localization method system of selection main-process stream schematic diagram;
Fig. 3: the localization method based on the travelling carriage pattern is selected schematic flow sheet;
Fig. 4: the localization method of travelling carriage auxiliary mode is selected schematic flow sheet.
Embodiment
According to the definition in WCDMA (Wideband Code Division Multiple Access (WCDMA)) agreement 25.305, the localization method of standard is divided three classes: CELL ID (cell ID), OTDOA (observed time difference), A-GPS (global positioning system of network assistance).In general, A-GPS, OTDOA method have higher horizontal location precision, but its location response time is long; The CELL ID method response time is very fast, but its horizontal location precision is limited.
The localization method of every kind of standard is divided into two kinds of station-keeping modes again: UE assisted (travelling carriage is auxiliary), UEbased (based on travelling carriage).In general, UE assisted station-keeping mode is compared UE based station-keeping mode, has higher horizontal location precision, but its shortcoming is to take more Internet resources.
If carry out between the standard setting method and the combination between standard setting method and the station-keeping mode, just can be combined into multiple localization method, following is the example of the localization method of several various combinations:
UE based CELL ID: based on travelling carriage CELL ID method.
UE based OTDOA: based on travelling carriage OTDOA localization method.
UE based A-GPS: based on travelling carriage A-GPS localization method.
UE based mixed positioning: station-keeping mode is based on travelling carriage, and comprehensively uses several different methods such as OTDOA, A-GPS to obtain hi-Fix result's localization method.
UE assisted OTDOA: the OTDOA localization method that travelling carriage is auxiliary.
UE assisted mixed positioning: station-keeping mode is that travelling carriage is auxiliary, and comprehensively uses several different methods such as OTDOA, A-GPS to obtain hi-Fix result's localization method.
In addition, also have a kind of special localization method to be: do not select the localization method or the station-keeping mode of any standard, directly with the residing reference cell of the travelling carriage that is positioned center as positioning result.
The localization method system of selection of a kind of optimization proposed by the invention, will take all factors into consideration the following factor and select localization method:
1, the Location Request that issues of core net: the selection of localization method should be able to be satisfied the specified QoS of Location Request of core net as far as possible.The QoS that mobile position estimation is relevant mainly contains following two factors:
The horizontal location precision will be considered its two kinds of values: high and low in the localization method system of selection;
The location response time, will consider its two kinds of values in the localization method system of selection: fast, slow;
2, the be positioned stationkeeping ability of UE: the selection of localization method should consider whether UE can finish needed someway location survey or location Calculation function.The stationkeeping ability of UE of being positioned mainly comprises following Several Factors:
UE based OTDOA supported (showing the observed time difference localization method of whether supporting based on travelling carriage) will consider its two kinds of values: support, do not support in the localization method system of selection.
Network Assisted GPS support (showing the global positioning system localization method of supporting which kind of network assistance) will consider its four kinds of values: Network based (Network Based), UE based (based on travelling carriage), Both (not only support Network Based but also support based on travelling carriage), None (not supporting) in the localization method system of selection.
Support for Rx-Tx time difference type2 measurement (showing that whether the transmitting-receiving time difference type 2 of supports mobile is measured) will consider its two kinds of values: support, do not support in the localization method system of selection.
3, the load of current SPU (processor at mobile position estimation center): the selection of localization method should be considered the rest processing capacity of current processor, whether can also satisfy the required operation of selected localization method.
The localization method system of selection of a kind of optimization proposed by the invention, its main treatment step is as follows:
Step 201:SMLC (mobile position estimation center) receives the Location Request of core net, begins to enter localization method and selects flow process.
Step 202: obtain current processor occupancy in QoS (service quality) index, the mobile position estimation center of this Location Request and the stationkeeping ability of the UE that is positioned (travelling carriage).
Wherein, the QoS of Location Request mainly comprises two factors: horizontal location required precision, location response time.If in the Location Request that core net issues, do not comprise horizontal location precision cell, then put the horizontal location precision and be: be low; If the desired horizontal location precision of core net less than the radius of the reference cell under the travelling carriage, is then put the horizontal location precision and is: height, otherwise the horizontal location precision is changed to: low.If in the Location Request that core net issues, do not comprise location response time cell, then put the location response time and be: be slow.Otherwise, put the location response time and be the location response time in the Location Request that core net issues.
Whether the stationkeeping ability of UE of being positioned mainly comprises three factors: UE based OTDOA supported (whether supporting the observed time difference localization method based on travelling carriage), Network Assisted GPS support (supporting the global positioning system localization method of which kind of network assistance), Support for Rx-Tx timedifference type2 measurement the transmitting-receiving time difference type 2 of supports mobile (measure).Wherein, Network Assisted GPS support has following four kinds of situations: Network based (Network Based), UE based (based on travelling carriage), Both (not only support Network Based but also support based on travelling carriage), None (not supporting).If SMLC obtains the failure of UE stationkeeping ability, then put UE based OTDOA supported and be: do not support; Putting Network Assisted GPS support is: do not support; Putting Support for Rx-Tx timedifference type2 measurement is: do not support.
Step 203: judge that whether the horizontal location required precision among the current Location Request QoS is: low; Is and the location response time: fast? if then change step 204 over to; Otherwise change step 205 over to.
Step 204: do not select any localization method, direct center with the residing reference cell of travelling carriage that is positioned is as final positioning result.Finish localization method and select flow process.
Step 205: judge whether the current processor occupancy in mobile position estimation center surpasses certain thresholding K? if then change over to based on the localization method of travelling carriage pattern and select flow process; Otherwise the localization method that changes the travelling carriage auxiliary mode over to is selected flow process.Wherein, the span of thresholding K is: 65% to 75%.
Is step 301: the stationkeeping ability of judging travelling carriage supported UE based A-GPS (based on the global positioning system of the network assistance of travelling carriage) localization method? if then change step 302 over to; Otherwise, change step 305 over to.Wherein, is judge that the stationkeeping ability of travelling carriage supports the judgment criterion of UE based A-GPS localization method to be: the Network Assisted GPS support part in the stationkeeping ability of inquiry travelling carriage: UE based (based on travelling carriage) or Both (not only support Network Based but also support based on travelling carriage)? if, then show this travelling carriage support UE based A-GPS localization method, otherwise for not supporting.
Is step 302: the stationkeeping ability of judging travelling carriage supported UE based OTDOA (based on the observed time difference of travelling carriage) localization method? if then change step 303 over to; Otherwise, change step 304 over to.
Step 303: localization method is chosen as hybrid locating method based on travelling carriage.Finish localization method and select flow process.Wherein, represent that based on the hybrid locating method of travelling carriage station-keeping mode is: based on travelling carriage, and SMLC will comprehensively use several different methods such as OTDOA, A-GPS to obtain the hi-Fix result.
Step 304: localization method is chosen as UE based A-GPS localization method.Finish localization method and select flow process.
Is step 305: the stationkeeping ability of judging travelling carriage supported UE based OTDOA localization method? if then change step 306 over to; Otherwise, change step 307 over to.
Step 306: localization method is chosen as UE based OTDOA localization method.Finish localization method and select flow process.
Is step 307: the stationkeeping ability of the judging travelling carriage whether transmitting-receiving time difference type 2 of supports mobile measured? if then change step 308 over to; Otherwise, change step 309 over to.
Step 308: localization method is chosen as UE based CELL ID (based on the cell ID of travelling carriage) localization method.Finish localization method and select flow process.
Step 309: do not select any localization method, direct center with the residing reference cell of travelling carriage that is positioned is as final positioning result.Finish localization method and select flow process.
Is step 401: the stationkeeping ability of judging travelling carriage supported Network based A-GPS (based on network property of network auxiliary global positioning system) localization method? if then change step 402 over to; Otherwise, change step 403 over to.Wherein, is judge that the stationkeeping ability of travelling carriage supports the judgment criterion of Network based A-GPS localization method to be: the Network Assisted GPS support part in the stationkeeping ability of inquiry travelling carriage: Network based (Network Based) or Both? if, then show this travelling carriage support Network based GPS localization method, otherwise for not supporting.
Step 402: localization method is chosen as the auxiliary hybrid locating method of travelling carriage.Finish localization method and select flow process.Wherein, the auxiliary hybrid locating method of travelling carriage represents that station-keeping mode is: travelling carriage is auxiliary, and SMLC will comprehensively use several different methods such as OTDOA, A-GPS to obtain the hi-Fix result.
Step 403: localization method is chosen as UE assisted OTDOA (observed time difference that travelling carriage is auxiliary) localization method.Finish localization method and select flow process.
This method can be according to the Location Request of core net, multiple correlative factors such as stationkeeping ability in conjunction with the current processing in the mobile position estimation center load and the travelling carriage that is positioned, automatically select suitable localization method, with the best location qos requirement that satisfies core net, can avoid the waste of wireless transmission resources simultaneously again.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (7)
1, a kind of system of selection of optimized mobile station localization method is characterized in that may further comprise the steps:
A: core net issues Location Request to the mobile position estimation center;
B: the mobile position estimation center obtains the Service Quality Metrics of Location Request, the processor occupancy that the mobile position estimation center is current and the stationkeeping ability of the travelling carriage that is positioned, wherein, the Service Quality Metrics of described Location Request comprises horizontal location precision and location response time, in the Location Request that core net issues, do not comprise the horizontal accuracy cell, or, comprise horizontal accuracy cell and horizontal location precision covering radius in the Location Request that core net issues more than or equal to the reference cell under the travelling carriage, then putting horizontal accuracy is: low, in the Location Request that core net issues, comprise location response time cell, then put the location response time and be: be fast;
C: if in the service quality of Location Request, the horizontal location precision is low and the location response time is fast, then changes steps d over to; Otherwise change step e over to;
D: with the center of the residing reference cell of travelling carriage that is positioned, as final positioning result; Finish localization method and select flow process;
E: judge whether the current processor occupancy in mobile position estimation center surpasses certain thresholding K, if then change over to based on the localization method of travelling carriage pattern and select flow process; Otherwise the localization method that changes the travelling carriage auxiliary mode over to is selected flow process.
2, the method for claim 1 is characterized in that among the described step e, the span of thresholding K is: 65% to 75%.
3, the method for claim 1 is characterized in that among the described step b, and the described stationkeeping ability that obtains the travelling carriage that is positioned comprises:
If the mobile position estimation center obtains the failure of mobile position estimation ability, then put the observed time difference localization method UE based OTDOA supported that whether supports based on travelling carriage and be: do not support; Put and whether support which kind of property of network auxiliary global positioning system localization method Network Assisted GPS support to be: do not support; Whether putting the transmitting-receiving time difference type 2 of supports mobile measures Support for Rx-Tx time difference type2measurement and is: do not support; Otherwise, the stationkeeping ability of putting travelling carriage the mobile position estimation ability that obtains by the mobile position estimation center of success.
4, method as claimed in claim 3 is characterized in that among the described step e, selects flow process further to comprise based on the localization method of travelling carriage pattern:
Step g 1: whether the stationkeeping ability of judging travelling carriage supports the property of network auxiliary global positioning system UE based A-GPS localization method based on travelling carriage, if then change step g 2 over to; Otherwise, change step g 5 over to;
Step g 2: whether the stationkeeping ability of judging travelling carriage supports the observed time difference UEbased OTDOA localization method based on travelling carriage, if then change step g 3 over to; Otherwise, change step g 4 over to;
Step g 3: localization method is chosen as hybrid locating method based on travelling carriage; Finish localization method and select flow process; Wherein, represent that based on the hybrid locating method of travelling carriage station-keeping mode is: based on travelling carriage, and the mobile position estimation center will comprehensively use observed time difference OTDOA or property of network auxiliary global positioning system A-GPS method to obtain the hi-Fix result;
Step g 4: localization method is chosen as UE based A-GPS localization method; Finish localization method and select flow process;
Step g 5: whether the stationkeeping ability of judging travelling carriage supports UE based OTDOA localization method, if then change step g 6 over to; Otherwise, change step g 7 over to;
Step g 6: localization method is chosen as UE based OTDOA localization method; Finish localization method and select flow process;
Step g 7: the stationkeeping ability of the judging travelling carriage whether transmitting-receiving time difference type 2 of supports mobile is measured, if then change step g 8 over to; Otherwise, change step g 9 over to;
Step g 8: localization method is chosen as cell ID UE based CELL ID localization method based on travelling carriage; Finish localization method and select flow process;
Step g 9: with the center of the residing reference cell of travelling carriage that is positioned, as final positioning result; Finish localization method and select flow process.
5, method as claimed in claim 4 is characterized in that in the described step g 1, judges whether the stationkeeping ability of travelling carriage supports the judgment criterion of UE based A-GPS localization method to be:
Whether the Network Assisted GPS support part in the stationkeeping ability of inquiry travelling carriage is: based on mobile station UE based or not only support Network Based but also support based on travelling carriage, if, then show this travelling carriage support UE based A-GPS localization method, otherwise for not supporting.
6, the method for claim 1 is characterized in that among the described step e, and the localization method of travelling carriage auxiliary mode selects flow process further to comprise:
Step f1: whether the stationkeeping ability of judging travelling carriage supports based on network property of network auxiliary global positioning system Network based A-GPS localization method, if then change step f2 over to; Otherwise, change step f3 over to;
Step f2: localization method is chosen as the auxiliary hybrid locating method of travelling carriage; Finish localization method and select flow process; Wherein, the auxiliary hybrid locating method of travelling carriage represents that station-keeping mode is: travelling carriage is auxiliary, and the mobile position estimation center will comprehensively use OTDOA or A-GPS method to obtain the hi-Fix result;
Step f3: localization method is chosen as the auxiliary observed time difference UE assisted OTDOA localization method of travelling carriage; Finish localization method and select flow process.
7, method as claimed in claim 6 is characterized in that among the described step fl, judges whether the stationkeeping ability of travelling carriage supports the judgment criterion of Network based A-GPS localization method to be:
Whether the NetworkAssisted GPS support part in the stationkeeping ability of inquiry travelling carriage is: Network based Network Based or not only support Network Based but also support based on travelling carriage, if, then show this travelling carriage support Network based GPS localization method, otherwise for not supporting.
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| CN100359987C (en) * | 2004-08-17 | 2008-01-02 | 中兴通讯股份有限公司 | Method for carrying out orientation entity switch in continuous orientation |
| CN1909717B (en) * | 2005-08-03 | 2012-05-16 | 中兴通讯股份有限公司 | Method and device for selecting positioning mode in WCDMA system |
| CN101568062B (en) | 2008-04-23 | 2012-11-21 | 华为技术有限公司 | Realization method, system, locating server and locating controller for location service |
| US8639271B2 (en) | 2008-07-02 | 2014-01-28 | Qualcomm Incorporated | Method and apparatus for supporting location-based services by a removable module |
| CN101656909B (en) * | 2008-08-21 | 2012-12-26 | 中国移动通信集团公司 | Method for positioning mobile terminal and base station |
| CN101583105B (en) * | 2009-06-22 | 2012-09-12 | 青岛海信移动通信技术股份有限公司 | Positioning method and positioning device of mobile terminal |
| CN101990297A (en) * | 2009-08-03 | 2011-03-23 | 中兴通讯股份有限公司 | Method and device for realizing locating service |
| KR101696508B1 (en) | 2010-04-07 | 2017-01-13 | 텔레폰악티에볼라겟엘엠에릭슨(펍) | Enhancement of positioning quality of service |
| CN108391224A (en) * | 2012-01-20 | 2018-08-10 | 联发科技股份有限公司 | Determine the method and wireless device of the priority orders of localization method |
| CN104902437A (en) * | 2015-04-28 | 2015-09-09 | 上海与德通讯技术有限公司 | One-key help seeking method and mobile terminal |
| CN109673007B (en) * | 2017-10-16 | 2022-05-10 | 中国移动通信有限公司研究院 | User information acquisition method and device and computer readable storage medium |
| CN113424610B (en) * | 2019-02-11 | 2023-09-22 | 上海诺基亚贝尔股份有限公司 | Enhanced positioning method, device and computer readable medium based on OTDOA |
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