CN1866049A - Cell-ID positioning method - Google Patents

Cell-ID positioning method Download PDF

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Publication number
CN1866049A
CN1866049A CNA2005101274419A CN200510127441A CN1866049A CN 1866049 A CN1866049 A CN 1866049A CN A2005101274419 A CNA2005101274419 A CN A2005101274419A CN 200510127441 A CN200510127441 A CN 200510127441A CN 1866049 A CN1866049 A CN 1866049A
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cell
soft handover
toa
positioning method
positioning
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CNA2005101274419A
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CN100562763C (en
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任学亮
杨平
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XFusion Digital Technologies Co Ltd
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Huawei Technologies Co Ltd
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Abstract

The related locating method for subzone label comprises: for two soft-switch co-address same-frequency near subzones, using locating parameter determined by soft-switch overlay area center direction as the result. This invention improves precision.

Description

A kind of cell-ID positioning method
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 transfer table 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; The single subdistrict signal of directional cell is launched by directional antenna, general directional cell synoptic diagram as shown in Figure 1, wherein co-frequency cell aerial signal overlapping areas promptly can be adjacent soft handover Lin Qu, and the antenna in cell deviation angle that the center angle direction forwards direct north counterclockwise to that transmits is the main lobe direction angle of sub-district; The transmit angle of overlay area of antenna in cell is the sub-district subtended angle;
Described directional cell is meant: the single subdistrict signal is launched by directional antenna, and described directional antenna signal is the banded covering in sector, and has the definite antenna main lobe deflection and the distribution of subtended angle;
Described omni cell is meant: by omni-directional antenna transmission, the signal of omnidirectional antenna is covering in the 360 degree scopes; Co-frequency cell aerial signal overlapping areas is adjacent soft handover adjacent area.
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 mistiming) 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 arrival), as shown in Figure 2, because this method bearing 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 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 geographic position description that defines in 3GPP TS 23.032 agreements, according to known cell aerial position and position angle, 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))+(position angle (θ)+subtended angle (β));
By above-mentioned narration as can be known, existing C ELL-ID+RTT method, in the TOA location algorithm implementation procedure of general location, owing to be the concyclic heart between the More Soft Handoff sub-district at cobasis station, it is the position at place, base station, although possible antenna in cell position is deployed with difference, but deviation can be very not big, the soft handover neighbor cell can be thought the concyclic heart in the calculating of positioning result, therefore in the algorithm process process, all do not consider the situation of the switching homogeneous-frequency adjacent-domain distribution of colocation site, therefore reduced the bearing accuracy of this method.
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, at two soft handover colocation sites directed neighbor cell of frequency together, the positional parameter that the center direction of utilizing soft handover to overlap the zone is determined is represented positioning result, improve the matching degree of positioning result central point and terminal physical location, also reduced the estimation of deviation scope in the zone of normal indication simultaneously.
The objective of the invention is to be achieved through the following technical solutions:
A kind of cell-ID positioning method, with the directed neighbor cell of frequency, the determined positional parameter of center direction that utilizes soft handover to overlap the zone is represented positioning result at two soft handover colocation sites.
Described method specifically comprises:
A, determine that colocation site selected common frequency measurement control to position measurement with directional cell number frequently more than or equal to 3 o'clock;
B, the determined positional parameter in center that utilizes soft handover to overlap the zone are represented positioning result.
Before described steps A, also comprise:
SOT state of termination is adjusted into dedicated channel CELL-DCH state.
Described steps A specifically comprises:
The signal of the same frequency soft handover position neighbor cell by issuing common frequency measurement control survey colocation site, form the signal overlap group, according to the deviation of adjacent soft handover homogeneous frequency adjacent area signal intensity, judge current terminal and whether be positioned at the adjacent boundary that cell sector covers.
Described step B specifically comprises:
The determined positional parameter of center direction that utilizes soft handover to overlap the zone is represented positioning result, if the main lobe direction angle of frequency soft handover position neighbor cell is λ together iAnd λ I+1, subtended angle is δ iAnd δ I+1, adopt following a kind of representation for positioning result:
Main lobe direction angle: λ=((λ i+ δ i/ 2)+(λ I+1-δ I+1/ 2))/2;
Subtended angle: δ＜=(δ i+ δ I+1)/2; If there are two TOA measurement results, then,
Radical length is expressed as: L=(TOA i+ TOA I+1)/2 * light velocity; Or select the TOA measurement result of one of them sub-district.
Described two TOA measurement results comprise the measurement of round trip time of the interface Iub between base station and the wireless network control and the subscriber equipment transmitting-receiving time difference measurements of controlled in wireless Uu interface.
Described method also comprises:
C, described positioning result is reported core network.
As seen from the above technical solution provided by the invention, the center direction that the present invention utilizes soft handover to overlap the zone is determined the main lobe direction angle of main lobe direction angle as positioning result, and the subtended angle amplitude of sub-district also can suitably reduce, thereby improve the matching degree of positioning result central point and terminal physical location, also reduce the estimation of deviation scope in the zone of normal indication simultaneously.
Description of drawings
Fig. 1 is the general directional cell synoptic diagram of prior art;
Fig. 2 is a prior art CELL-ID+RTT localization method synoptic diagram;
Fig. 3 is a prior art TOA instrumentation plan;
Fig. 4 is a prior art elliptic arc positioning result representation synoptic diagram;
Fig. 5 is a kind of embodiment operational flowchart of the method for the invention;
Fig. 6 is an elliptic arc positioning result representation synoptic diagram among a kind of embodiment of the method for the invention.
Embodiment
Core concept of the present invention provides a kind of cell-ID positioning method, at two soft handover colocation sites directed neighbor cell of frequency together, the main lobe direction angle that the center direction of utilizing soft handover to overlap the zone is determined is as the main lobe direction angle of positioning result, and the subtended angle amplitude of sub-district also can suitably reduce, thereby improve the matching degree of positioning result central point and terminal physical location, also reduce the estimation of deviation scope in the zone of normal indication simultaneously.
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: having only under the wireless links situation, determining that colocation site is with frequency directional cell number;
In same base station, when a plurality of directional cells that have colocation site carry out comprehensive network signal when covering, at first, the size at the main lobe direction angle of definition directional cell is respectively according to ascending order sign corresponding district: CELL 1, CELL 2... CELL n
Cell signal overlapping areas in twos, can come unique the expression with following sign:
CELL 1^CELL 2，CELL 2^CELL 3，......，CELL n-1^CELL n；
Wherein, when n is 1, then be omni cell; When n is 2, exist this moment two overlapping covered, which terminal generally can't distinguish when inserting partly be to belong to the overlapping region; When n more than or equal to 3 the time, overlapping covered between the sub-district determine, promptly have only a kind of may, and can CELL i^CELL I+1Form come unique identification, wherein, 1＜=i＜n, CELL iAnd CELL I+1Directional cell belongs to neighbouring relations on the position.
Step 3: when colocation site with directional cell number frequently more than or equal to 3 the time, select common frequency measurement control to position measurement;
When having only the Radio Link of a colocation site, the signal of the same frequency soft handover position neighbor cell by issuing common frequency measurement control survey colocation site is formed the signal overlap group; If current active collection link is CELL i, can utilize RSCP (received signal code power) or Ec/No (signal to noise ratio (S/N ratio)) the common frequency measurement method of being correlated with, the CELL that the measuring position is adjacent I-1And CELL I+1The homogenous frequency signal quality; If neighboring area signal is more intense or with current area CELL iSignal difference and when little, do not need directly to increase Radio Link this moment, according to the deviation of adjacent soft handover homogeneous-frequency adjacent-domain signal intensity, judges current terminal and whether be positioned at the adjacent boundary that cell sector covers;
If CELL I-1, CELL iAnd CELL I+1Signal intensity be respectively: S I-1, S iAnd S I+1, at S iUnder the prerequisite for peak signal, if S I-1Signal compare S I+1Good, as satisfying a threshold requirement S Diff, and S I-1Signal also reaches certain signal strength level S Thresh, adopt CELL this moment I-1^CELL iTwo directional cells form the signal overlap group, measure; If S I+1Compare S I-1Signal is good, then adopts CELL i^CELL I+1Two directional cells form the signal overlap group, measure;
|S i-1-S i+1|＞＝S Diff，
S I-1＞=S ThreshPerhaps S I-1＞=S Thresh,
At S I-1Perhaps S I+1Select good one of signal intensity, as with sub-district CELL iCombination, as CELL I-1^CELL iPerhaps CELL i^CELL I+1Overlapping central area, sub-district in twos is as the center of location Calculation;
Step 4: position calculating according to measurement result, and with improved elliptic arc normal indication method representation positioning result;
When two active set cell that have colocation site, and belong to neighbor cell CELL iAnd CELL I+1, can determine that terminal is in two cell signal covering overlapping areas this moment;
As shown in Figure 6, angle can adopt following representation: directly use the main lobe direction angle of the synthetic determined main lobe direction of center direction angle, the directed sector of two sub-district correspondences as the elliptic arc representation, and just do not take the main lobe direction angle of a sub-district in the active set, the subtended angle β of the sector region in the positioning result representation also can correspondingly reduce simultaneously, thereby further reduces the scope;
If CELL iAnd CELL jThe main lobe direction angle be λ iAnd λ I+1, subtended angle is δ iAnd δ I+1, can adopt following a kind of representation for positioning result:
Main lobe direction angle: λ=((λ i+ δ i/ 2)+(λ I+1-δ I+1/ 2))/2;
Subtended angle: δ＜=(δ i+ δ I+1)/2;
If there are two TOA measurement results, promptly there are two RL (Radio Link), radical length L can average, that is,
L=(TOA i+ TOA I+1)/2 * light velocity,
Described two TOA measurement results comprise that the RTT of Iub (interface between base station and the wireless network control) interface and the UE Rx-Tx Time Difference of Uu (wireless control interface) interface measure;
Also can select the TOA measurement result of one of them sub-district.
If have only a TOA to measure, promptly there is a RL, then directly calculate.
In Fig. 6, when inserting sub-district CELL1, still be positioned at and CELL2 adjacent position district, the CELL1 zone that can be represented this moment by real oblique line can be the representation of center with CELL1 and CELL2 overlapping region.
Step 5: described positioning result is reported core network.
In sum, the center direction that the present invention utilizes soft handover to overlap the zone is determined the main lobe direction angle of main lobe direction angle as positioning result, and the subtended angle amplitude of sub-district also can suitably reduce, thereby improve the matching degree of positioning result central point and terminal physical location, also reduce the estimation of deviation scope in the zone of normal indication simultaneously.
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 domain of claim.

Claims (7)

1, a kind of cell-ID positioning method is characterized in that, with the directed neighbor cell of frequency, the determined positional parameter of center direction that utilizes soft handover to overlap the zone is represented positioning result at two soft handover colocation sites.
2, a kind of cell-ID positioning method as claimed in claim 1 is characterized in that, described method specifically comprises:
A, determine that colocation site selected common frequency measurement control to position measurement with directional cell number frequently more than or equal to 3 o'clock;
B, the determined positional parameter in center that utilizes soft handover to overlap the zone are represented positioning result.
3, a kind of cell-ID positioning method as claimed in claim 2 is characterized in that, also comprises before described steps A:
SOT state of termination is adjusted into dedicated channel CELL-DCH state.
4, a kind of cell-ID positioning method as claimed in claim 2 is characterized in that, described steps A specifically comprises:
The signal of the same frequency soft handover position neighbor cell by issuing common frequency measurement control survey colocation site, form the signal overlap group, according to the deviation of adjacent soft handover homogeneous frequency adjacent area signal intensity, judge current terminal and whether be positioned at the adjacent boundary that cell sector covers.
5, a kind of cell-ID positioning method as claimed in claim 2 is characterized in that, described step B specifically comprises:
The determined positional parameter of center direction that utilizes soft handover to overlap the zone is represented positioning result, if the main lobe direction angle of frequency soft handover position neighbor cell is λ together iAnd λ I+1, subtended angle is δ iAnd δ I+1, adopt following a kind of representation for positioning result:
Main lobe direction angle: λ=((λ i+ δ i/ 2)+(λ I+1-δ I+1/ 2))/2;
Subtended angle: δ＜=(δ i+ δ I+1)/2; If there are two TOA measurement results, then,
Radical length is expressed as: L=(TOA i+ TOA I+1)/2 * light velocity; Or select the TOA measurement result of one of them sub-district.
6, a kind of cell-ID positioning method as claimed in claim 5, it is characterized in that described two TOA measurement results comprise the measurement of round trip time of the interface Iub between base station and the wireless network control and the subscriber equipment transmitting-receiving time difference measurements of controlled in wireless Uu interface.
7, a kind of cell-ID positioning method as claimed in claim 2 is characterized in that, described method also comprises:
C, described positioning result is reported core network.
CNB2005101274419A 2005-12-02 2005-12-02 A kind of cell-ID positioning method Active CN100562763C (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101365172B (en) * 2007-08-10 2014-08-13 中兴通讯股份有限公司 Precisely positioning method for user under household base station
CN111542113A (en) * 2020-05-09 2020-08-14 清华大学 Positioning method, positioning and map construction device and readable storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101365172B (en) * 2007-08-10 2014-08-13 中兴通讯股份有限公司 Precisely positioning method for user under household base station
CN111542113A (en) * 2020-05-09 2020-08-14 清华大学 Positioning method, positioning and map construction device and readable storage medium

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Effective date of registration: 20211223

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.