Method for positioning mobile terminal by single base station

A positioning method and mobile terminal technology, applied in the field of wireless positioning, can solve the problems of long time for positioning base stations, low positioning accuracy, large one-time investment, etc., and achieve the effects of less positioning time, high positioning accuracy and low manufacturing cost

Inactive Publication Date: 2005-11-09
CHONGQING UNIV OF POSTS & TELECOMM
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  • Description
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Problems solved by technology

[0004] In order to solve the above defects in the existing positioning technology, this positioning system adopts a new positioning method. This positioning system only needs to set up one positioning base station LMU in the cellular mobile network, which solves the problem of multi-base positioning system in the prior art. The deployment time of positioning base stations is too long, the positioning accuracy is not high, the algorithm is complex, the real-time performance is low, and the one-time investment is too large, etc.

Method used

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  • Method for positioning mobile terminal by single base station
  • Method for positioning mobile terminal by single base station
  • Method for positioning mobile terminal by single base station

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Embodiment Construction

[0012] Such as figure 1 As shown, when the cellular network base station and the positioning base station are separated, use the single positioning base station method to complete the positioning of the mobile terminal, build a single base station positioning environment, and place the positioning base station in the target environment where the mobile terminal needs to be located. The determination can be based on the target's activity environment or can be obtained from the mobile terminal operator. In this system, the positioning base station LMU adopts a three-antenna structure. First search for the mobile terminal that needs to be positioned until the target information is found, and obtain the time delay of the pilot signal of the cellular network base station serving the tracked target; obtain the geographic location information of the cellular network base station, and determine the coverage radius of the cellular network base station. Such as figure 2 As shown, usi...

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Abstract

A single base station positioning method relates to a location method relates to a location method for mobile terminals in the cellular network, which uses single location base station to search, position and track to mobile terminals of cellular networks. A location base station tests the pilot signal time delay of a cellular base station serving the tracked target and searches for the entering channel of the target mobile terminal, estimates the arrived time delay to construct an elliptical equation taking the cellular base station and location base station as the focal points with the help of the above two time delay differential value to get the orientation angle of the target arriving at the base station to determine two crossing points, which can be the position of the searched target, one point is abandoned based on the action distance of the cellular service base station, the rest one is the determined target position.

Description

technical field [0001] The invention relates to a wireless positioning method, which is especially suitable for positioning a cellular network mobile terminal. Background technique [0002] At present, the positioning systems of cellular network mobile terminals are divided into two categories: mobile station-based positioning and network-based positioning. Mobile station-based positioning uses signals from cellular network base stations to estimate their own positions. Commonly used are GPS and AGPS (GPS Aided) etc., its disadvantage is that the existing mobile terminals need to be transformed; the network-based positioning uses the signal from the mobile station to calculate the position of the mobile station, but generally the network needs to be transformed, and the commonly used positioning algorithms include TOA / TDOA ( Time of Arrival / Time Difference of Arrival), AOA (Angle of Arrival), AOA / RTD (Angle of Arrival / Round Trip Delay), EOTD (Enhanced Observed Time differenc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00G01S5/12
Inventor 田增山
Owner CHONGQING UNIV OF POSTS & TELECOMM
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