CN100369523C - Method for supporting mobile positioning business by direct station - Google Patents
Method for supporting mobile positioning business by direct station Download PDFInfo
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- CN100369523C CN100369523C CNB2004100513672A CN200410051367A CN100369523C CN 100369523 C CN100369523 C CN 100369523C CN B2004100513672 A CNB2004100513672 A CN B2004100513672A CN 200410051367 A CN200410051367 A CN 200410051367A CN 100369523 C CN100369523 C CN 100369523C
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- repeater
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Abstract
The present invention relates to a method for a repeater station for supporting a mobile positioning service. When the repeater station is introduced in a range which is not covered by signals from a base station in the WCDMA mobile communication network, the present invention adopts the method that the information of the basic parameters of the repeater station is configured in the SRNC side of a service wireless network controller, position estimation calculation is carried out to all assumed paths between a mobile station and three base stations in periphery, then the obtained errors are verified, and finally, the position of the assumed path with the least errors is obtained as the approximate position of the mobile station. The method of the present invention has the advantages that the positioning accuracy to the mobile station is enhanced when the repeater station is in the network, and the positioning service can be supported better by the repeater station.
Description
Technical field
The present invention relates to the implementation method of 3G moving communicating field location value-added service, relate in particular to the method that improves WCDMA mobile communication system wireless location precision.
Background technology
At present, the WCDMA mobile communication system is supported following three kinds of location technologies.
1, based on the location technology of Cell ID (cell identification)
Utilized the characteristic of wireless network itself based on the location technology of Cell ID, not needing on basic network topology is that positioning service increases new entity or unit.Because in wireless cellular network, network can be understood the cell information of travelling carriage registration at any time, so just can utilize the Cell ID at travelling carriage place to carry out the overlay area coarse positioning.This technology generally can only navigate to certain sector of certain base station or base station, and its positioning accuracy depends on the dense degree of base station, and therefore position error can't realize senior location value-added service generally greater than 200 meters.
2, based on the location technology of OTDOA
Based on OTDOA (Observed Time Difference Of Arrival, observation arrives the time difference) Positioning Principle is as shown in Figure 1, poor (measured signal is launched by antenna for base station by measuring propagation delay that signal between two different base stations and the travelling carriage arrives, measure at travelling carriage reception antenna place), obtain the range difference of travelling carriage and these two base stations, just obtain a pair of thus with these two hyperbolas that the base station is a focus.By measuring two groups of OTDOA values, just can obtain two pairs of hyperbolas, hyp two intersection points of this two couple are the possible estimated position of travelling carriage, and then utilize RTT (loop propagation delay time) or Cell ID to accept or reject one of them possibility estimated position, finally obtain an estimated position of travelling carriage.
3, auxiliary GPS location technology Network Based
Auxiliary GPS location technology Network Based mainly is that the auxiliary parameter of utilizing GPS receiver module on the travelling carriage and mobile network to provide realizes the location.Adopt this location technology, travelling carriage need receive 4 gps satellite signals at least, simultaneously the navigation message of demodulation of satellite.Travelling carriage or network utilisation receive that the satellite-signal time delay draws the pseudorange of travelling carriage to each satellite, and the supplementary of utilizing pseudorange and network to provide at last calculates the exact position of travelling carriage.
In the above-mentioned location technology of WCDMA mobile communication system wireless location, the location technology and location technology based on GPS based on wireless signal measurement between base station and the travelling carriage based on Cell ID (cell ID), mobile communications network selects the mixed strategy of one or more location technologies to provide positioning service for the client according to the QoS (service quality) and the network condition of location client request location.In the weak signal area and the blind area of radio communication coverage area, operator can introduce a large amount of repeaters with dead zone-eliminating or raising signal quality in order to improve the better network coverage.But because the repeater is to the change of transmission of wireless signals direction and the increase of propagation delay time, the positioning accuracy in the coverage of repeater will descend even produce the location of mistake greatly.
Therefore there is defective in prior art, and awaits improving and development.
Summary of the invention
The object of the present invention is to provide a kind of repeater to support the method for mobile location service, the technical problem that solves is when introducing the repeater in the scope that does not cover at WCDMA mobile communication network base station signal, positioning accuracy is also improved in the location that can correct mistakes by the inventive method, realize the value-added service of high-quality location, eliminate the destruction of the original sub-district covering that causes thus, and eliminate the positioning accuracy that has a strong impact on travelling carriage in this sub-district even produce wrong location defect.
For achieving the above object, the present invention proposes a kind of method of utilizing wireless signal raising positioning accuracy under the situation of introducing repeater, it comprises following step:
The method of mobile location service is supported in a kind of repeater, and it may further comprise the steps:
A) configuration repeater relevant information in the foreground of direct amplifying station monitoring monitor board or backstage supervision database;
B) in the position determining entity database of service wireless network controller side, increase the repeater relevant information, and direct amplifying station monitoring linked to each other with base station supervisory systems or whole network operation maintenance centre, when networking, the repeater repeater relevant information in the direct amplifying station monitoring is imported this position determining entity database by network management and monitoring system; In the base station information database, increase the repeater relevant information simultaneously;
C) do not consider the repeater influence and consider that the repeater participates under the hypothesis path mode of signal transmission at all, be that travelling carriage receives that the path mode of 3 base stations on every side or its repeater signal has only at most under 8 kinds of methods of exhaustion that may make up, each path is arrived the time difference scheme with observation carry out estimated position of location estimation calculating acquisition, utilize two base stations except that reference base station and the hyperbola between the base station to verify and obtain an estimated position then, more described twice estimated position obtains error, and the path mode upper/lower positions of getting minimal error is estimated as location of mobile station.
Described method, wherein, described repeater relevant information comprises the propagation delay time between position, repeater, donor base station, coverage, routing direction angle, antenna elevation angle, transmit after receive time delay and repeater and the donor base station.
The method of mobile location service is supported in a kind of repeater provided by the present invention, owing to adopted in service wireless network controller SRNC side configuration repeater basic parameter information, and all hypothesis paths of travelling carriage and 3 base station communications are on every side carried out location estimation is calculated and checking obtains error, the location estimation of finally getting the hypothesis path of minimal error is the method for location of mobile station, this method has improved repeater positioning accuracy to travelling carriage when net, makes repeater can support better positioning service.
Description of drawings
Fig. 1 is the OTDOA positioning principle figure in the 3G communication system of prior art;
Fig. 2 is OTDOA hypothesis verification positioning flow figure of the present invention.
Embodiment
For convenience of description and the explanation, defined two notions of often mentioning in the inventive method: error is defined as an estimated position of travelling carriage and the distance between another estimated position; Hyperbola between two base stations (repeater) when the 3rd pair of hyperbola is defined as each application OTDOA location estimation except that reference base station (repeater).
The method of mobile location service is supported in a kind of repeater of the present invention, and as shown in Figure 2, it may further comprise the steps:
The first step, configuration repeater relevant information in the foreground of direct amplifying station monitoring monitor board or backstage supervision database comprises position, repeater, donor base station, coverage, routing direction angle, antenna elevation angle, transmit after receive time delay T
RPTAnd the propagation delay time T between repeater and the donor base station
UTRAN-RPTDeng.
Second step, in the position determining entity database of SRNC (service wireless network controller) side, increase the data of repeater information, and direct amplifying station monitoring linked to each other with base station supervisory systems or whole network operation maintenance centre, the repeater can import this database with the repeater information in the direct amplifying station monitoring by network management and monitoring system when networking.In the base station information database, increase the information of relevant repeater simultaneously.
The 3rd step, at first carry out location estimation and calculate to obtain an estimated position with the OTDOA scheme, utilize two base stations except that reference base station then and the hyperbola between the base station is verified and relatively obtain error with estimated position that the OTDOA scheme draws.Carry out location estimation calculating and checking acquisition error under all hypothesis path modes, the path mode upper/lower positions of getting minimal error is estimated as location of mobile station.
According to the described step of foregoing invention method, the data about repeater information at first are set in direct amplifying station monitoring, comprise position, repeater, donor base station, coverage, routing direction angle, antenna elevation angle, transmit after receive time delay T
RPTAnd the propagation delay time T between repeater and the donor base station
UTRAN-RPTDeng.In order to reduce the information interaction between repeater and the network, shorten the positioning service response time simultaneously, when the repeater networks this information is imported in the position determining entity database of SRNC example.And under a plurality of hypothesis path modes, carry out location estimation calculating and utilize corresponding the 3rd pair of hyperbola checking to obtain error, the path mode upper/lower positions of getting minimal error is estimated as location of mobile station, finally realizes the support of repeater to positioning service.
For Cell ID localization method, after obtaining basic coverage cell scope, can also further improve positioning accuracy by RTT (loop propagation delay time).When introduce the repeater in wireless network after, this moment, therefore than the honeycomb that does not have the repeater, such RTT was just more inaccurate because the time delay honeycomb can become greatly.Behind the Serving cell (Cell ID) of the travelling carriage that obtains to be positioned and the several repeaters that may communicate by letter, suppose that respectively the signal that travelling carriage is received is directly to receive from the base station or transmit the back through repeater (comprising cascade) to receive, further dwindle the possible zone of travelling carriage with supplementary RTT then, but because this moment, the actual RTT that uses was a loop propagation delay time between repeater and the travelling carriage, and the actual RTT of the recording value of network is the loop propagation delay time between base station and the travelling carriage, and therefore actual effectively RTT is that measure R TT deducts T
UTRAN-RPTAnd T
RPTBy the comparison of twice estimation region, utilize information such as signal strength information again, can know that travelling carriage whether in the coverage of repeater, then can obtain the location estimation zone of travelling carriage.
For the OTDOA localization method, can be in conjunction with the principle of Fig. 1 and the flow process labor explanation of Fig. 2.Based in the background technology about the description of OTDOA technology, can utilize the choice of two pairs of hyperbolas shown in Figure 1 and Cell ID or RTT can obtain the estimated position D of a travelling carriage.Can know also that simultaneously the hyperbola (the 3rd pair of hyperbola) between base station B and the base station C do not use in location estimation is calculated, can utilize this hyperbola verifying.In theory, if estimated position D is correct, this hyperbola should be also through estimated position D so.Repeater R of hypothesis introducing is base station A service as shown in Figure 1, and network system and travelling carriage do not know that all there be (whether the two-way communication that promptly can not know travelling carriage and base station is by repeater R transfer) in it, the mode (not considering the influence of repeater R) that the location Calculation center is at first described with Fig. 1 is carried out location estimation and is calculated, also have a location estimation during then with the 3rd pair of hyperbola checking, calculate the error of twice estimated position.Then, suppose that repeater R has participated in the transmission of this signal, then replace using the OTDOA scheme behind the position of base station A and recomputate location estimation that this moment, travelling carriage received that the transmission time of the signal of base station A also should deduct T with the position of repeater R
UTRAN-RPTAnd T
RPTIn like manner, also obtain another error with corresponding the 3rd pair of hyperbola checking.Twice error ratio, getting the less transmission channel mode of error is the transmission of wireless signals approach of travelling carriage and base station, knows wireless signal whether by repeater R transfer transmission, can obtain under this transmission channel the estimation to location of mobile station.
In like manner, lay (repeater of a sector configuration and do not have cascade), have only at most and calculate and hypothesis verification for 8 times for the repeater of most of project planning.Also be that travelling carriage receives that the path mode of 3 base stations on every side or its repeater signal has only 8 kinds (exhaustive) to make up at most.Location estimation under the transmission channel mode of error minimum is exactly the estimated position of travelling carriage, but does not get rid of because the also little possibility of the theoretic minimal error of error ratio behind the false supposition (being exactly wrong signal path mode originally).Therefore adopt to after the ordering of 8 grouping errors again with the further checking and of householder methods such as Cell ID or RTT by the error rearrangement, perhaps can verify and error result is sorted again according to the direction that base station or repeater cover.The signal path mode that signal path mode of getting the error minimum at last is a current mobile station, the estimated position of the travelling carriage that promptly obtains simultaneously.
Based on the method for measurement, calculating and the checking of exhaustive and hypothesis verification signal path mode, also can be improved for the positioning accuracy problem of (when for example railway covers along the line) under the cascade situation of repeater.Simultaneously because the location response time of OTDOA scheme mainly consumes on measuring rather than the location estimation of SRNC side is calculated, therefore, even exhaustively also can reach the response time identical substantially with the OTDOA scheme.
For network assistance GPS localization method, because its location realizes it being the position that assistant GPS information calculations that GPS module receiving satellite signal and mobile network by travelling carriage provide goes out travelling carriage.Therefore if the repeater cooperates the T of extra introducing with such navigation system
UTRAN-RPTAnd T
RPTThe change of time delay and wireless signal direction can't influence the performance of network assistance GPS location.Promptly after travelling carriage used network assistance GPS localization method, the repeater will be less than influence to positioning service.
In sum, from the above-mentioned analysis of three kinds of localization methods under introducing the repeater situation to the support of WCDMA mobile communication system, it is effective can drawing method of the present invention, can effectively improve repeater positioning accuracy to travelling carriage when net, make repeater can support better positioning service.
Therefore should be understood that above-mentioned explanation at specific embodiment of the present invention is too concrete, can not think the restriction of scope that patent of the present invention is asked for protection, scope of patent protection should be as the criterion with claims.
Claims (3)
1. the method for mobile location service is supported in a repeater, and it may further comprise the steps:
A) configuration repeater relevant information in the foreground of direct amplifying station monitoring monitor board or backstage supervision database;
B) in the position determining entity database of service wireless network controller side, increase the repeater relevant information, and direct amplifying station monitoring linked to each other with base station supervisory systems or whole network operation maintenance centre, when networking, the repeater repeater relevant information in the direct amplifying station monitoring is imported this position determining entity database by network management and monitoring system; In the base station information database, increase the repeater relevant information simultaneously;
C) do not consider the repeater influence and consider that the repeater participates under the hypothesis path mode of signal transmission at all, be that travelling carriage receives that the path mode of 3 base stations on every side or its repeater signal has only at most under 8 kinds of methods of exhaustion that may make up, each path is arrived the time difference scheme with observation carry out estimated position of location estimation calculating acquisition, utilize two base stations except that reference base station and the hyperbola between the base station to verify and obtain an estimated position then, more described twice estimated position obtains error, and the path mode upper/lower positions of getting minimal error is estimated as location of mobile station.
2. method according to claim 1 is characterized in that, described repeater relevant information comprises the propagation delay time between position, repeater, donor base station, coverage, routing direction angle, antenna elevation angle, transmit after receive time delay and repeater and the donor base station.
3. method according to claim 1 and 2, it is characterized in that, further comprise error in the described step c), verify with Cell ID or RTT method again described acquisition, perhaps verify according to the direction of base station or repeater covering, thus the new error that obtains.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100513672A CN100369523C (en) | 2004-08-31 | 2004-08-31 | Method for supporting mobile positioning business by direct station |
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| CNB2004100513672A CN100369523C (en) | 2004-08-31 | 2004-08-31 | Method for supporting mobile positioning business by direct station |
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| CN100369523C true CN100369523C (en) | 2008-02-13 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100455130C (en) * | 2006-08-16 | 2009-01-21 | 华为技术有限公司 | Method and system for improving positioning of mobile station and radio network controller |
| CN101202573B (en) * | 2007-03-30 | 2012-01-11 | 厦门特力通信息技术有限公司 | Intelligent straight placement station and parameter automatic adjustment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09113597A (en) * | 1995-10-19 | 1997-05-02 | Fujitsu Ltd | Position orienting method |
| CN1454013A (en) * | 2002-04-26 | 2003-11-05 | 华为技术有限公司 | Directly amplifying station and its mobile station locating method |
| CN1464753A (en) * | 2002-06-19 | 2003-12-31 | 华为技术有限公司 | Repeater having locating function and auxiliary locating method thereof in mobile communication system |
| CN1491064A (en) * | 2002-10-15 | 2004-04-21 | ��Ϊ��������˾ | Mobile station positioning method and its direct broadcasting station |
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2004
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09113597A (en) * | 1995-10-19 | 1997-05-02 | Fujitsu Ltd | Position orienting method |
| CN1454013A (en) * | 2002-04-26 | 2003-11-05 | 华为技术有限公司 | Directly amplifying station and its mobile station locating method |
| CN1464753A (en) * | 2002-06-19 | 2003-12-31 | 华为技术有限公司 | Repeater having locating function and auxiliary locating method thereof in mobile communication system |
| CN1491064A (en) * | 2002-10-15 | 2004-04-21 | ��Ϊ��������˾ | Mobile station positioning method and its direct broadcasting station |
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