CN1489313A - Method for positioning user device at soft changing state - Google Patents
Method for positioning user device at soft changing state Download PDFInfo
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- CN1489313A CN1489313A CNA021374260A CN02137426A CN1489313A CN 1489313 A CN1489313 A CN 1489313A CN A021374260 A CNA021374260 A CN A021374260A CN 02137426 A CN02137426 A CN 02137426A CN 1489313 A CN1489313 A CN 1489313A
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Abstract
The method includes following steps. (1) Determining central coordinate of each subzone in activation set. (2) Making out straight lines perpendicular to connecting lines between center of reference subzone and each center of adjacent subzones as well as passing through center of reference subzone, and areas enclosed by said straight lines and borderline of the reference subzone are selected as direction areas, if the said enclosed areas are near to adjacent subzones. (3) Based on positioning method, positioning result of UE in reference subzone is obtained. (4) Superposed areas between direction areas obtained from step (2) and positioning result obtained from step (3) are as final positioning result for UE. Comparing with prior art, the invention raises precision of positioning UE, simple without complex calculation, and not affecting time for obtaining result by using RNC.
Description
Technical field
The present invention relates to a kind of definite subscriber equipment (User Equipment, UE) location method of position, relate in particular to Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiplex Access, the WCDMA) method that when UE is in soft changing state, UE is positioned in the honeycomb mobile communcations system.
Technical background
In recent years, the mobile communication development was very swift and violent, and particularly digital mobile cellular telecommunication is particularly outstanding.The later stage nineties 20th century, second generation mobile communication system such as GSM (Global System for Mobilecommunication, Global Link) digital cellular mobile communication systems and narrowband CDMA (Code DivisionMultiplex Access, code division multiple access) cell mobile communication systems is used widely in the world, in order to solve the problem that second generation mobile communication system exists, International Telecommunication Association is trying hard to recommend the 3G (Third Generation) Moblie standard and is comprising WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)), CDMA2000 and TD-SCDMA (Time Division Synchronization CDMA, TD SDMA), digital mobile cellular telecommunication possesses wide application prospect because of its unique advantage.
Mobile location service is a business of utilizing the UE position to carry out, such as urgency traffic, value-added service.Corresponding with it is mobile positioning technique, and it is meant that the specific localization method of requirement selection of network based consumer positioning obtains the technology of UE positional information.In the WCDMA system, localization method mainly contains 3 kinds: based on the method for sub-district, comprise two kinds of concrete grammars of CI and CI+RTT (Round Trip Time, loopback delay); OTDOA (Observed Time Difference Of Arrival, the observed time difference of arrival) method, and AGPS (Assisted Global Positioning System, agps system) method.In these three kinds of localization methods, the simplest based on the localization method realization of sub-district, as any change, network side does not need increase equipment to UE yet.Wherein the positioning accuracy of CI method is minimum, and this method of CI+RTT utilizes parameter corrections such as RTT that positioning accuracy is increased than CI method, but its positioning accuracy is still on the low side than other two kinds of methods; OTDOA localization method precision increases, but need increase some measuring unit LMU (Location Measurement Unit, Location Measurement Unit) at network side, and algorithm is also more complicated.AGPS localization method precision is the highest, but need the GPS receiver be installed at UE, and network also needs to increase the gps satellite grounded receiving station.Carry out the initial stage in positioning service, operator mainly develops value-added service, and under the fast requirement of the little construction of investment, emphasis uses the localization method based on the sub-district.
Cell mobile communication systems need be set up many sub-districts, and the sub-district generally can be divided into omni cell and directional cell, and directional cell can be divided into several sectors according to actual conditions.Among the present invention, omni cell and general designation sub-district, sector.In the WCDMA system, all there is an antenna each sub-district in order to communicate by letter with UE.Each sub-district is discerned by a unique identification code CI (Cell Identity, cell ID).
The CI localization method is that RNC (Radio Network Controller, radio base station controller) is by obtaining the CI of sub-district, UE place, directly with the positioning result of this cell area as UE, shown in the dash area of Fig. 1.
The CI+RTT localization method is that RNC utilizes parameters such as RTT, and the positioning result of CI method is revised, and promptly calculates the distance of UE from antenna in cell center, place, and the measure error of parameter makes UE among the distance of antenna is in a zone that width arranged.Shown in the dark circle loop section of Fig. 2.
Soft handover is one of core technology of WCDMA.The characteristics of soft handover are to begin to set up when getting in touch with a new sub-district as UE, do not interrupt immediately and communicating by letter between the sub-district originally.Soft handover can avoid neighbor cell since with frequently in the overlapping covered strong jamming that causes, and reduce greatly owing to switch the call drop that causes, guaranteed the reliability of communication.The number of cells of actual participation soft handover is more than or equal to two.The set that is participating in the sub-district formation of UE soft handover is called Active Set.
When UE is in soft changing state, Location Request might be arranged just in time.To this 3GPP (3
RdGenerationPartnership Project, third generation partnership projects) the agreement TS of Zhi Dinging (Technical Specification, technical protocol) 25.305 explanations: in soft changing state, UE has several signal branch and is connected to different sub-districts, so corresponding a plurality of CI, and can only be with a sub-district as positioning result based on the localization method of sub-district, so SRNC (Serving RNC, Serving RNC) needs comprehensive all cell informations relevant, from Active Set, select a reference cell to determine positioning result with object UE.Agreement 3GPP TS 25.305 provides the selection of reference cell can be based on following one or several principle: begun to receive but switching nearest " newly " sub-district of going over also such as the sub-district with best signal quality, the sub-district, the UE that are connected with UE recently from the time, by RTT calculation of parameter come out to have with the UE sub-district etc. of minimum distance.The positioning result that utilizes reference cell to obtain must be the scope of whole reference cell: to the CI method, being exactly whole reference cell, to the CI+RTT method, is exactly the part of annulus in the annulus of reference cell center of antenna distance R TT or sector.
Therefore, prior art is with the scope of the whole reference cell positioning result as CI method or CI+RTT method, and scope is big, and precision is low.Have not yet to see other the relevant open source information in the location with soft changing state.
Summary of the invention
The objective of the invention is to determine in the Active Set reference cell as the low deficiency of soft changing state UE positioning result precision, propose a kind ofly more high-precisionly to come the band of position method of positioning UE by dwindling UE in the reference cell for the usefulness that overcomes existing 3GPP agreement regulation.
A kind of method that subscriber equipment under the soft changing state is positioned comprises the following steps:
(1) determines the centre coordinate of each sub-district of Active Set;
(2) zone of the close adjacent cell that will surround by the reference cell central point and with reference cell straight line vertical with each adjacent cell central point line and reference cell edge is as the orientation zone of UE;
(3) utilize localization method to obtain the positioning result of UE in reference cell based on the sub-district;
(4) zone that the positioning result that obtains in the orientation zone of the UE that obtains in the step (2) and the step (3) is coincided is as the final positioning result to UE.
Said method can be after execution of step (1), first execution in step (3), and execution in step (2) is carried out described step (4) at last again.Also can be with step (2) and (3) executed in parallel.
Its position was in intersection zone, adjacent Active Set sub-district and near such fact thereof when the present invention was in soft changing state according to UE, determine that UE is in the orientation of reference cell, the position of UE is dwindled within a zone of reasonableness of reference cell positioning result, improve positioning accuracy with this.Prior art is to the CI method, with the whole cell area of CI correspondence as positioning result, to the CI+RTT method, with whole sub-district middle distance antenna is that (D=(RTT-UE Rx-Tx time difference the type 2)/annulus (to omni cell) 2*c) or the part (to sector cell) of annulus be as positioning result, and this scope with whole sub-district makes positioning accuracy lower as the method for positioning result for D.Adopt the method for the invention, key is to utilize step 2 to dwindle the orientation zone of UE, and the intersection of the reference cell positioning result that UE orientation zone that at last step 2 is obtained and step 3 obtain is defined as the positioning result of UE.Compared with prior art, reached the effect that improves the UE positioning accuracy, and method is simple, does not introduce complicated calculating or measurement, also do not influence the time that RNC obtains positioning result.
Description of drawings
Fig. 1 is the omni cell that obtains with the CI localization method and the positioning result schematic diagram of directional cell.
Fig. 2 is omni cell and the directional cell ground positioning result schematic diagram that obtains with the CI+RTT localization method.
Fig. 3 is the flow chart of method proposed by the invention.
Fig. 4 is the schematic diagram of UE when being in soft changing state.
Fig. 5 is a schematic diagram of determining the center of sector cell.
Fig. 6 is the positioning result schematic diagram of embodiments of the invention 1.
Fig. 7 is the positioning result schematic diagram of embodiments of the invention 2.
Fig. 8 is the positioning result schematic diagram of embodiments of the invention 3.
Fig. 9 is the positioning result schematic diagram of embodiments of the invention 4.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The present invention is based on and followingly true consider: to being in the UE of soft changing state, its position in fact drop on neighbor cell overlap the zone and near, therefore can from whole reference cell, mark a part as positioning result, scope is dwindled and is made positioning accuracy improve.Precondition of the present invention has two: (1) has determined the reference cell that certain sub-district of UE Active Set will be used as positioning result.(2) need know antenna in cell position coordinates and characterising parameters such as cell type, regional extent, these databases after the network planning is finished just can provide.
Fig. 1 is the omni cell that obtains with the CI localization method and the positioning result schematic diagram of directional cell.As shown in Figure 1, Fig. 1 (a) is the positioning result schematic diagram that omni cell is positioned with the CI localization method; Fig. 1 (b) is the positioning result schematic diagram that directional cell is positioned with the CI localization method.Wherein the zone shown in the dash area is locating area.101 and 102 corresponding omni cell of difference and sector cells are regions, UE position among Fig. 1.
Fig. 2 is omni cell and the directional cell ground positioning result schematic diagram that obtains with the CI+RTT localization method.As shown in Figure 2, Fig. 2 (a) is the positioning result schematic diagram that omni cell is positioned with the CI+RTT localization method; Fig. 2 (b) is the positioning result schematic diagram that directional cell is positioned with the CI+RTT localization method.Wherein the zone shown in the dash area is locating area.Region, UE position in the dark circle loop section 201 corresponding omni cell among Fig. 2 (a), in the sector of a part 202 corresponding directional cells of dark annulus region, UE position in the sector cell among Fig. 2 (b).
Fig. 3 is the flow chart of method proposed by the invention.As shown in Figure 3, the present invention includes following steps:
1, decides the centre coordinate of each sub-district of Active Set.The center of omni cell is exactly an aerial position.The center that the present invention defines sector cell is the cornerwise mid point of being done along the antenna direction of propagation in sub-district.
2, the zone of the close Active Set sub-district intersecting area that will surround by the reference cell central point and with reference cell straight line vertical with each adjacent cell central point line and reference cell edge is as the orientation zone of UE.Detailed process is: establishing Active Set has N sub-district, and one is reference cell, and other N-1 is the adjacent cell of reference cell.N is more than or equal to 2.Reference cell is designated as Cr, and adjacent cell is designated as C
1, C
2..., C
N-1Center and C with Cr
1The center link to each other and to obtain line L
Rl, make above-mentioned line L by the center of reference cell Cr then
RlVertical line V
R1, V
RiReference cell is divided into two, and wherein being partial to the subregional sidelights of two sub-district coincidence parts is S
1By that analogy, reference cell is carried out above-mentioned processing to N-1 adjacent cell, obtains S
1, S
2..., S
N-1, their intersection on reference cell are exactly the orientation zone of UE.N is big more, and the orientation zone of UE is more little, and positioning accuracy is just high more.
3, utilize based on the positioning result on the localization method acquisition reference cell of sub-district.Detailed process is:
The CI method: according to the regulation of agreement 3GPP TS 23.171, RNC is when receiving Location Request, and UE is in connection mode.If connection mode is in CELL_PCH (Cell Paging Channel, the cell paging channel) or CELL_DCH (Cell Dedicated Channel, cell private channel) or CELL_FACH (Cell Forward Access Channel, cell forward access channel) state, RNC has had the CI of UE, if the UE pattern is URA_PCH (User Registration Area Paging Channel, the user registration area paging channel) state, RNC initiates to make the state of UE forward CELL_FACH or CELL_DCH state to the paging of UE, thereby obtains the CI of UE reference cell of living in.The whole cell area of CI correspondence is exactly the positioning result of agreement.
CI+RTT method: as UE during not at the CELL_DCH state, RNC is at first by processes such as paging UE or channel reprovisions, allow the state exchange of UE to CELL_DCH, RNC sends measurement control order (Measurement Control) to UE then, requirement UE measures UE Rx-Tx time difference type2 (UE receives and dispatches time difference type 2) parameter and reports, and requires Node B to measure and report the RTT parameter.UE is (RTT-UE Rx-Tx time difference type 2)/2*c (radio propagation speed) from the distance D of antenna in cell.Be that UE drops on D according to the certainty of measurement estimation precision of these two parameters be that the about width in center is about 35 meters zone.To omni cell, this zone is an annulus, and to the sector, this zone is the part of annulus.
4, the intersection of the reference cell positioning result that obtains of the UE orientation zone that obtains of step 2 and step 3 is defined as the positioning result of UE.To omni cell, it is the crossing a part of annulus of both sides radius of annulus and UE orientation zone; To the sector, it is a part of annulus that part of annulus of former reference cell drops on UE orientation zone the inside.
Before execution in step 4, the execution of step 2 and step 3 does not have the sequencing requirement, therefore can executed in parallel, thus do not influence time of RNC response Location Request.
Fig. 4 is the schematic diagram of UE when being in soft changing state.Line among the figure between two antenna in cell and the UE represents that UE all has link in soft changing state this two sub-districts that neutralize.
Fig. 5 is a schematic diagram of determining the center of sector cell.Dotted line is represented the sub-district diagonal drawn along the antenna in cell direction of propagation, and cornerwise mid point 501 is defined as center of housing estate.
Fig. 6 is the positioning result schematic diagram of embodiments of the invention 1, is that the reflection Active Set has the present invention based on the CI localization method of two sub-districts to locate schematic diagram.These two sub-districts of mandatory declaration herein are respectively omni cell or sector cell, and combination all is random in which way, and also regular figure not necessarily of the shape of sub-district.This figure is an example, suppose to be made up of sector cell 601 and omni cell 602, and sub-district 601 is reference cell that RNC determines.The process of obtaining the UE positioning result is as follows:
Connect sub-district 601 and 602 centers, sub-district and obtain the line of centres 603.
Do the vertical line 604. of line 603 by the center of reference cell 601
Vertical line is divided into two reference cell 601, and a side of close 601 and 602 liang of sub-district overlapping regions is that shadow region 605 is final positioning results.
If need not method of the present invention, whole sub-district 601 all be the positioning result of UE, and obviously the present invention has improved positioning accuracy.
Fig. 7 is the positioning result schematic diagram of embodiments of the invention 2, is that Active Set has the present invention based on the CI localization method of two above sub-districts to locate schematic diagram.These three sub-districts of mandatory declaration herein are omni cell or sector cell, and combination all is random in which way, and also regular figure not necessarily of the shape of sub-district.This figure supposes to be made up of three omni cell 701,702 and 703 as an example, and sub-district 701 is reference cell that RNC determines.The process of obtaining the UE positioning result is as follows:
Determine center of housing estate, this Fig. 3 sub-district all is omni cell, and the center is an aerial position, and ideal situation is the center of circle.
Connect sub-district 701 and 702 centers, sub-district and obtain two center of housing estate lines 706.
Do the vertical line 704 of line 706 by the center of reference cell 701.
Vertical line is divided into two sub-district 701, and a side semicircle zone 708 that comprises overlapping region, three sub-districts 710 is UE orientation zone 708 of determining according to reference cell 701 and adjacent cell 702.
Connect sub-district 701 and 703 centers, sub-district and obtain the line of centres 707.
Do the vertical line 705 of line 707 by the center of reference cell 701.
Vertical line is divided into two sub-district 701, and a side semicircle zone 709 that comprises overlapping region, three sub-districts 710 is UE orientation zone 709 of determining according to reference cell 701 and adjacent cell 703.
For the situation of three above sub-districts, reference cell and adjacent cell are determined the UE orientation zone one by one, and these regional intersection are exactly the final orientation zone of UE, also are positioning results to the CI method.Adjacent cell is many more, and the UE orientation zone is more little, and positioning accuracy is high more.If need not method of the present invention, whole sub-district 701 all be the positioning result of UE, and obviously the present invention has improved positioning accuracy.
Fig. 8 is the positioning result schematic diagram of embodiments of the invention 3, is that Active Set has the present invention based on the CI+RTT method of two sub-districts to locate schematic diagram.To this situation, definite process of UE orientation zone is identical with the described step of Fig. 6.If do not consider the present invention, the positioning result of reference cell is to be the center with sector cell antenna 804, (RTT-UE Rx-Tx time difference type 2)/2*c is one section circular arc zone 801 of radius, and the intersection of this zone and UE orientation zone 802 is that radius 803 and 805 circular arc zones of enclosing in the sector region are positioning results of the present invention.For the situation of sector cell, the degree that positioning accuracy improves depends on the relative position of sub-district and the UE distance from aerial position.
Fig. 9 is the positioning result schematic diagram of embodiments of the invention 4, is that Active Set has the present invention based on the CI+RTT localization method of two above sub-districts to locate schematic diagram.To this situation, definite process of UE orientation zone is identical with the described step of Fig. 7.If do not consider the present invention, the positioning result of reference cell 902 is the center with reference cell aerial position 903, (RTT-UE Rx-Tx time difference type 2)/2*c is the circle ring area 901 of radius, and the intersection of this zone and UE orientation zone 904 is that to enclose the circular arc zone of being enclosed in the sector region be positioning result of the present invention for radius 905 and 906.Compare whole annulus, positioning accuracy improves obviously.
The present invention utilizes soft changing state UE to be near the such priori overlapping region, Active Set sub-district, by setting the UE locating area and with it with based on the method that the cell localization result intersects, reaching the purpose that improves the UE positioning accuracy.This invention is equally applicable to have the precision of mobile position estimation of the cdma system of soft changing state and improves.
Claims (6)
1, a kind of method that subscriber equipment under the soft changing state is positioned is characterized in that comprising the following steps:
(1) determines the centre coordinate of each sub-district of Active Set;
(2) zone of the close adjacent cell that will surround by the reference cell central point and with reference cell straight line vertical with each adjacent cell central point line and reference cell edge is as the orientation zone of UE;
(3) utilize localization method to obtain the positioning result of UE in reference cell based on the sub-district;
(4) zone that the positioning result that obtains in the orientation zone of the UE that obtains in the step (2) and the step (3) is coincided is as the final positioning result to UE.
2, a kind of method that subscriber equipment under the soft changing state is positioned according to claim 1 is characterized in that: after executing described step (1), and first execution in step (3), execution in step (2) is carried out described step (4) at last again.
3, a kind of method that subscriber equipment under the soft changing state is positioned according to claim 1, it is characterized in that: described step (2) and (3) are executed in parallel.
4, a kind of method that subscriber equipment under the soft changing state is positioned according to claim 1 is characterized in that: the method for determining the sector cell center in the described step (1) is the cornerwise mid point in sub-district that will be done along the antenna direction of propagation center as this sub-district.
5, a kind of method that subscriber equipment under the soft changing state is positioned according to claim 1, it is characterized in that: the localization method based on the sub-district described in the step (3) is the CI method.
6, a kind of method that subscriber equipment under the soft changing state is positioned according to claim 1, it is characterized in that: the localization method based on the sub-district described in the step (3) is the CI+RTT method.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021374260A CN100336326C (en) | 2002-10-11 | 2002-10-11 | Method for positioning user device at soft changing state |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021374260A CN100336326C (en) | 2002-10-11 | 2002-10-11 | Method for positioning user device at soft changing state |
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| CN1489313A true CN1489313A (en) | 2004-04-14 |
| CN100336326C CN100336326C (en) | 2007-09-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100446623C (en) * | 2006-08-02 | 2008-12-24 | 华为技术有限公司 | OTDOA positioning method and equipment |
| CN102668631A (en) * | 2009-12-29 | 2012-09-12 | 真实定位公司 | Cooperating receiver selection for umts wireless location |
| WO2016033946A1 (en) * | 2014-09-02 | 2016-03-10 | 中兴通讯股份有限公司 | Identification method, device and system of wcdma network cell soft handover band and storage medium |
| CN109309956A (en) * | 2017-07-28 | 2019-02-05 | 中国移动通信集团山西有限公司 | Location positioning method, device, equipment and computer readable storage medium |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5669061A (en) * | 1994-08-19 | 1997-09-16 | Trimble Navigation Limited | Automatic cellular phone tracking |
| US5613205A (en) * | 1995-03-31 | 1997-03-18 | Telefonaktiebolaget Lm Ericsson | System and method of locating a mobile terminal within the service area of a cellular telecommunication system |
| FR2767616B1 (en) * | 1997-08-25 | 1999-09-24 | Alsthom Cge Alcatel | METHOD FOR LOCATING A FIXED TERMINAL THANKS TO A CONSTELLATION OF SATELLITES |
-
2002
- 2002-10-11 CN CNB021374260A patent/CN100336326C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100446623C (en) * | 2006-08-02 | 2008-12-24 | 华为技术有限公司 | OTDOA positioning method and equipment |
| CN102668631A (en) * | 2009-12-29 | 2012-09-12 | 真实定位公司 | Cooperating receiver selection for umts wireless location |
| WO2016033946A1 (en) * | 2014-09-02 | 2016-03-10 | 中兴通讯股份有限公司 | Identification method, device and system of wcdma network cell soft handover band and storage medium |
| CN109309956A (en) * | 2017-07-28 | 2019-02-05 | 中国移动通信集团山西有限公司 | Location positioning method, device, equipment and computer readable storage medium |
| CN109309956B (en) * | 2017-07-28 | 2020-11-24 | 中国移动通信集团山西有限公司 | Position locating method, device, equipment and computer readable storage medium |
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| CN100336326C (en) | 2007-09-05 |
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