CN100512534C - Cell identification positioning method - Google Patents
Cell identification positioning method Download PDFInfo
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- CN100512534C CN100512534C CNB2005101274423A CN200510127442A CN100512534C CN 100512534 C CN100512534 C CN 100512534C CN B2005101274423 A CNB2005101274423 A CN B2005101274423A CN 200510127442 A CN200510127442 A CN 200510127442A CN 100512534 C CN100512534 C CN 100512534C
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Abstract
The invention relates to a region mark position method, belonging to the network communication technique. Wherein, it comprises following steps: first, fixing the common-frequency regions of different base stations nearby the real position of terminal, to measure the signal of common-frequency regions; selecting other common-frequency regions covered by signal as the target region of common-frequency measurement, to send the common-frequency measurement control, to measure the signal quality of said regions, to be reported to the service wireless network controller SRNC; according to the measured result, fixing the new wireless chain circuit, and sending the measurement control for calculating the reach time TOA, to obtain several TOA measured results, and using several TOA measurements to position via multi-circle intersection. The invention can improve the position accuracy.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to a kind of cell-ID positioning method.
Background technology
Existing WCDMA (Wideband Code Division Multiple Access (WCDMA)) system generally uses CELL-ID (cell ID) to position, and it is applicable to all cellular networks, is divided into following two kinds of methods:
1), CELL-CENTER method: do not need travelling carriage that any location measurement information is provided, also need not change existing network, only need increase simple positioning flow processing and get final product at network side.Positioning principle is: the position and the sub-district of the serving BS that network based UE (subscriber equipment) is current cover positioning mobile station.If the sub-district is omni cell, then the position of UE is to be the center with the sub-district of being inserted in the serving BS, and radius is in the circle of coverage radius of cell; If the sub-district belongs to directional cell, can determine further that then UE is in the scope of certain sector covering; Described directional cell is meant the single subdistrict signal by directional antenna emission, general directional cell schematic diagram as shown in Figure 1, wherein co-frequency cell aerial signal overlapping areas promptly can be adjacent soft handover Lin Qu; And be omni cell by omni-directional antenna transmission;
2), CELL-ID+RTT method: need UE to be in CELL-DCH (dedicated channel) state, and provide UE Rx-Tx time Difference (UE receives and dispatches the time difference) measurement capability, and carry out under the situation of RTT (two-way time) measurement the base station, cover configuration with reference to each sub-district simultaneously, by crossing locating area with the active set cell for the central circular zone by definite one or more of TOA (time of advent), as shown in Figure 2, because this method positioning accuracy than CELL-CENTER method height, therefore claims that this method is the method for enhancement mode CELL-ID.
Described TOA is meant the one-way only propagation time delay of wireless signal on DPCH (physical channel), its instrumentation plan as shown in Figure 3, this TOA is calculated by two measurements: the RTT that the base station provides measures and the Rx-Tx time difference of UE measures, and computing formula is:
TOA＝(RTT-UE?Rx-Tx?Time?Difference)/2；
As shown in Figure 4, utilize the TOA normal indication form of single CELL-ID+RTT localization method, standard according to the geographical position description that defines in 3GPP TS 23.032 agreements, according to known cell aerial position and azimuth, sub-district and subtended angle, and the single effective TOA measurement result that from single RL (Radio Link), is obtained, can determine to use following a kind of band of position representation:
Elliptic arc (Ellipsoid Arc): central point (longitude+latitude)+(interior path length (r1)+uncertain path length (r2))+(azimuth (θ)+subtended angle (β));
By above-mentioned narration as can be known, existing C ELL-ID+RTT method is in general TOA location algorithm implementation procedure, positioning accuracy is high more more at most as TOA, reach three as the TOA among Fig. 2, exist three wireless links this moment, and these three active set cell adhere to different base stations separately.But in the one-time positioning process, even be in soft handover area, in time several seconds that initiation position fixing process employing CELL-ID+RTT localization method positions, exist the probability of Radio Link of two and above number all lower, most of situation has only a wireless links to exist, and is difficult to definitely know the soft switching process that when can carry out based on the increase Radio Link that covers during localization process.Therefore, under situation about receiving, when adopting the CELL-ID+RTT localization method, under the situation that a TOA measures, will depend critically upon the size of coverage radius of cell from the core network Location Request.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the object of the present invention is to provide a kind of cell-ID positioning method, by increasing Radio Link, realize measurement to Radio Link TOA, thereby by obtaining the positioning accuracy that a plurality of TOA improve the CELL-ID+RTT localization method.
The objective of the invention is to be achieved through the following technical solutions:
A kind of cell-ID positioning method comprises:
A, service wireless network controller SRNC determine to need to initiate to carry out the measurement of common-frequency cell signal near the co-frequency cell that adheres to different base station separately the terminal physical location;
B, SRNC select to have the Target cell of other co-frequency cell of signal covering as common frequency measurement, issue common frequency measurement control, measure the signal quality of these sub-districts;
C, SRNC are according to the signal quality of described sub-district, definite successful foundation that can realize Radio Link, and can finish the synchronizing process of Radio Link with terminal, then newly-built Radio Link, and issue to be used to calculate and arrive the relevant measurement control of time T OA, obtain a plurality of TOA measurement results, and utilize a plurality of TOA measurements to carry out positioning many round intersecting.
Described steps A also comprises:
The definite needs initiation of SRNC is carried out near the co-frequency cell that adheres to different base station separately the terminal physical location before the measurement of common-frequency cell signal SOT state of termination being adjusted into dedicated channel CELL-DCH state.
Described steps A specifically comprises:
When terminal is under the CELL-DCH state, if current exists a wireless links, in the time of can only obtaining a TOA measurement result or can only obtain two TOA measurement results at most, SRNC determines whether that according to the distributed areas of locating terminal and the required precision of Location Request needing to initiate to carry out common-frequency cell signal near the co-frequency cell that adheres to different base station separately the terminal physical location measures.
SRNC need to determine initiation to comprise at the principle that near the co-frequency cell that adheres to different base station separately the terminal physical location carries out the measurement of common-frequency cell signal in the described steps A:
Determine to have now active set link TOA measurement and do not satisfy desired precision in the Location Request; Or,
Carry out once the location that preliminary cell ID is held concurrently CELL-ID+RTT two-way time based on existing active set link, do not satisfy positioning requirements in error, and according to residing zone with adhere to the situation that different base station homogeneous-frequency adjacent-domain position relation defines soft handover separately; Or,
The situation that the residing band of position of terminal exists the signal of corresponding homogeneous-frequency adjacent-domain on other base station to cover.
Other co-frequency cell system of selection comprises among the described step B:
SRNC inserts the co-frequency cell configuration relation of sub-district and the attribute of the geographic area that the sub-district covered according to the active user, and the homogeneous-frequency adjacent-domain coverage property in terminal zone of living in, select to have the Target cell of other co-frequency cell that adheres to different base stations separately of signal covering as this common frequency measurement.
Described step C comprises:
Measure neighboring cell signal quality by certain control with the measurement of type frequently, inform the signal quality situation that the SRNC Target cell is measured in real time, SRNC determines to meet certain threshold requirement, then triggers the increase of Radio Link; Or,
When the signal quality condition that satisfies the sub-district that is provided with, SRNC initiatively triggers the increase of Radio Link.
Described step C also comprises:
Finish after the location survey Radio Link that does not meet the soft handover gain thresholding that the SRNC deletion is newly-built.
As seen from the above technical solution provided by the invention, the present invention is by measuring the signal quality of homogeneous frequency adjacent area, and satisfactory sub-district joined in the active set, measure thereby obtain a plurality of TOA, and utilize a plurality of TOA measurement to carry out many circles to intersect and improved and improved the probability that the CELL-ID+RTT localization method obtains higher positioning accuracy.
Description of drawings
Fig. 1 is the general directional cell schematic diagram of prior art;
Fig. 2 is a prior art CELL-ID+RTT localization method schematic diagram;
Fig. 3 is a prior art TOA instrumentation plan;
Fig. 4 is a prior art elliptic arc positioning result representation schematic diagram;
Fig. 5 is a kind of embodiment operational flowchart of the method for the invention.
Embodiment
Core concept of the present invention provides a kind of cell-ID positioning method, by measuring the homogeneous frequency adjacent area signal quality, and initiatively trigger the increase Radio Link according to the homogeneous frequency adjacent area signal quality, after Radio Link increases successfully, carry out the measurement of respective wireless link TOA, thereby by obtaining the positioning accuracy that a plurality of TOA improve the CELL-ID+RTT localization method.
The invention provides a kind of cell-ID positioning method, its a kind of embodiment operating process specifically comprises the steps: as shown in Figure 5
Step 1: SOT state of termination is adjusted into the CELL-DCH state;
When SRNC receives positioning control request from CN (core network), if this moment, terminal was not in the CELL_DCH state, then carry out the migration of correlation behavior, make terminal switch to the CELL_DCH state;
Step 2: determine whether that needing to initiate to carry out common-frequency cell signal near the co-frequency cell that adheres to different base station separately the terminal physical location measures;
When terminal is under the CELL-DCH state, if only there is a wireless links this moment, in the time of can only obtaining a TOA measurement result or can only obtain two TOA measurement results at most, SRNC determines whether that according to the locating terminal distributed areas roughly and the required precision of Location Request needing to initiate to carry out common-frequency cell signal near the co-frequency cell that adheres to different base station separately the terminal physical location measures; Judgement for whether needing to be initiated as the common frequency measurement control of obtaining many TOA location survey value comprises following principle:
A) measure can satisfy in the Location Request desired precision the time as existing active set link TOA, smaller as the cell signal covering radius, then can directly use the positioning flow of original CELL-ID+RTT;
B) carry out once the location of preliminary CELL-ID+RTT based on existing active set link, roughly can determine, do not satisfy positioning requirements in error, and according to residing zone with adhere to different base station homogeneous-frequency adjacent-domain position relation separately and define under the situation of soft handover, carry out issuing of common frequency measurement control;
C) the residing band of position of terminal does not have then not need to carry out issuing of common frequency measurement control under the situation that the signal of corresponding homogeneous-frequency adjacent-domain on other base station covers;
When not needing to carry out the issuing of common frequency measurement control, execution in step 7, promptly the TOA measured value based on existing existing Radio Link directly positions calculating;
When needs carry out issuing of common frequency measurement control, the operation below carrying out;
Step 3: select to have the Target cell of other co-frequency cell of signal covering, issue common frequency measurement control, measure the signal quality of these sub-districts, report SRNC (service wireless network controller) as this common frequency measurement;
When determining to need initiation to carry out mass measurement at the co-frequency cell that adheres to different base station separately, insert the co-frequency cell configuration relation of sub-district and the attribute of the geographic area that the sub-district covered according to the active user, and the possible homogeneous-frequency adjacent-domain coverage property in terminal zone of living in, selection has the Target cell of other co-frequency cell of signal covering as this common frequency measurement, issue common frequency measurement control, measure the signal quality of these sub-districts, measure as using Ec/No (signal to noise ratio) and RSCP (received signal code power); Owing to can measure a plurality of co-frequency cells on a base station, but when setting up Radio Link, must can only get one of them homogeneous-frequency adjacent-domain that conforms to quality requirements, and same base station is the concyclic heart, therefore general effective TOA also can only use one of them, therefore measured co-frequency cell generally all need carry out the measurement of cell signal quality at the co-frequency cell that adheres to different base stations separately;
In the processing of measuring control, both can also can realize by the form of cycle report by the form of Event triggered:
The form of cycle report is to measure neighboring cell signal quality by certain control with the measurement of type frequently, inform the signal quality situation that the SRNC Target cell is measured in real time, reach certain thresholding and stability requirement as sluggish and postpone the trigger condition requirement as the signal quality of some sub-district, can initiatively trigger the increase of Radio Link;
The form of event report is when the signal quality condition that satisfies the sub-district that is provided with, and as event reports such as 1e/1a, can initiatively trigger the increase of Radio Link;
Step 4:, judge whether newly-built Radio Link according to described measurement result;
SRNC judges whether to meet certain threshold requirement according to the quality information of co-frequency cell, if meet then newly-built Radio Link;
For and when increasing Radio Link based on the purpose of location survey, as long as the thresholding of its judgement and requirement can realize the successful foundation of Radio Link, and finish the synchronizing process of Radio Link with terminal, can consider to increase this link; And finish after the location survey, as do not meet the soft handover gain thresholding can delete as described in newly-built Radio Link;
If do not meet certain threshold requirement, then do not need newly-built Radio Link, execution in step 7, promptly the TOA measured value based on existing existing Radio Link directly positions calculating;
Step 5: if need newly-built Radio Link, then the newly-built Radio Link of SRNC issues the relevant measurement control of TOA, obtains a plurality of TOA measurement results;
Step 6:SRNC is according to a plurality of TOA measurement results, thereby obtains the radial distance of a plurality of terminals and sub-district, according to positioning intersecting of described a plurality of radial distances, thereby obtains higher positioning accuracy.
In sum, the present invention is by measuring the signal quality of homogeneous frequency adjacent area, and satisfactory sub-district joined in the active set, measure thereby obtain a plurality of TOA, and utilize a plurality of TOA measurements to carry out many round intersecting and improve and improve the probability that the CELL-ID+RTT localization method obtains higher positioning accuracy.
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 claim.
Claims (7)
1, a kind of cell-ID positioning method is characterized in that, comprising:
A, service wireless network controller SRNC determine to need to initiate to carry out the measurement of common-frequency cell signal near the co-frequency cell that adheres to different base station separately the terminal physical location;
B, SRNC select to have the Target cell of other co-frequency cell of signal covering as common frequency measurement, issue common frequency measurement control, measure the signal quality of these sub-districts;
C, SRNC are according to the signal quality of described sub-district, definite successful foundation that can realize Radio Link, and can finish the synchronizing process of Radio Link with terminal, then newly-built Radio Link, and issue to be used to calculate and arrive the relevant measurement control of time T OA, obtain a plurality of TOA measurement results, and utilize a plurality of TOA measurements to carry out positioning many round intersecting.
2, a kind of cell-ID positioning method as claimed in claim 1 is characterized in that, described steps A also comprises:
The definite needs initiation of SRNC is carried out near the co-frequency cell that adheres to different base station separately the terminal physical location before the measurement of common-frequency cell signal SOT state of termination being adjusted into dedicated channel CELL-DCH state.
3, a kind of cell-ID positioning method as claimed in claim 2 is characterized in that, described steps A specifically comprises:
When terminal is under the CELL-DCH state, if current exists a wireless links, in the time of can only obtaining a TOA measurement result or can only obtain two TOA measurement results at most, SRNC determines whether that according to the distributed areas of locating terminal and the required precision of Location Request needing to initiate to carry out common-frequency cell signal near the co-frequency cell that adheres to different base station separately the terminal physical location measures.
4, a kind of cell-ID positioning method as claimed in claim 1 is characterized in that, SRNC need to determine initiation to comprise at the principle that near the co-frequency cell that adheres to different base station separately the terminal physical location carries out the measurement of common-frequency cell signal in the described steps A:
Determine to have now active set link TOA measurement and do not satisfy desired precision in the Location Request; Or,
Carry out once the location that preliminary cell ID is held concurrently CELL-ID+RTT two-way time based on existing active set link, do not satisfy positioning requirements in error, and according to residing zone with adhere to the situation that different base station homogeneous-frequency adjacent-domain position relation defines soft handover separately; Or,
The situation that the residing band of position of terminal exists the signal of corresponding homogeneous-frequency adjacent-domain on other base station to cover.
5, a kind of cell-ID positioning method as claimed in claim 1 is characterized in that, other co-frequency cell system of selection comprises among the described step B:
SRNC inserts the co-frequency cell configuration relation of sub-district and the attribute of the geographic area that the sub-district covered according to the active user, and the homogeneous-frequency adjacent-domain coverage property in terminal zone of living in, select to have the Target cell of other co-frequency cell that adheres to different base stations separately of signal covering as this common frequency measurement.
6, a kind of cell-ID positioning method as claimed in claim 1 is characterized in that, described step C comprises:
Measure neighboring cell signal quality by certain control with the measurement of type frequently, inform the signal quality situation that the SRNC Target cell is measured in real time, SRNC determines to meet certain threshold requirement, then triggers the increase of Radio Link; Or,
When the signal quality condition that satisfies the sub-district that is provided with, SRNC initiatively triggers the increase of Radio Link.
7, a kind of cell-ID positioning method as claimed in claim 1 is characterized in that, described step C also comprises:
Finish after the location survey Radio Link that does not meet the soft handover gain thresholding that the SRNC deletion is newly-built.
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| CNB2005101274423A CN100512534C (en) | 2005-12-02 | 2005-12-02 | Cell identification positioning method |
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| CNB2005101274423A CN100512534C (en) | 2005-12-02 | 2005-12-02 | Cell identification positioning method |
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| CN100512534C true CN100512534C (en) | 2009-07-08 |
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| CN102111871B (en) * | 2009-12-23 | 2013-08-07 | 中国移动通信集团公司 | Terminal location method and device based on cell identifier location technology |
| WO2014071620A1 (en) * | 2012-11-09 | 2014-05-15 | 华为技术有限公司 | Method for uplink softer handover, ue and base station |
| CN111356075A (en) * | 2018-12-22 | 2020-06-30 | 华为技术有限公司 | Multi-site positioning method and device |
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Effective date of registration: 20211221 Address after: 450046 Floor 9, building 1, Zhengshang Boya Plaza, Longzihu wisdom Island, Zhengdong New Area, Zhengzhou City, Henan Province Patentee after: Super fusion Digital Technology Co.,Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |
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