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Traveling carriage positioning method

A positioning method and mobile station technology, applied in electrical components, wireless communication, diversity/multi-antenna systems, etc., can solve problems such as affecting positioning performance and inability to locate mobile stations, and achieve the effect of improving accuracy

Active Publication Date: 2011-06-15
GUANGDONG PLANNING & DESIGNING INST OF TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Among the TDOA positioning methods in the prior art, there are positioning methods such as the Chan algorithm, the Taylor sequence expansion method, and the Fang algorithm, wherein the Fang algorithm converts the distance difference between the mobile station and two of the base stations through TDOA, and For the position coordinates of each base station, a quadratic equation is established for the three base stations, and the positioning is realized by solving the root of the quadratic equation. Compared with the dependence of the Chan algorithm on the Gaussian distribution of the TDOA error obeying zero mean, and the convergence of the Taylor sequence expansion method However, since the positioning method of the Fang algorithm must depend on the quadratic equation under the established TDOA model having real roots, the established quadratic equation has no real roots In the case of , the mobile station cannot be located
In addition, in the positioning method of Fang algorithm, only the relevant information of three base stations needs to be used, and the mobile station in the mobile communication network environment usually communicates with multiple base stations in a paging area, so This Fang algorithm positioning method cannot make full use of the relevant information of other base stations for positioning, which affects the positioning performance

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Embodiment 1

[0021] See figure 1 What is shown is a schematic flowchart of the first embodiment of the mobile station positioning method of the present invention.

[0022] Such as figure 1 As shown, the mobile station positioning method in this embodiment includes the steps:

[0023] Step S101: Obtain measurement report information from the network side of the mobile communication system, and obtain the TDOA value according to the measurement report information, and proceed to step S102;

[0024] Step S102: Use the improved Fang algorithm of the present invention to perform positioning estimation on the TDOA value, obtain the estimated position group of the mobile station, and go to step S103;

[0025] Step S103: Discriminate all estimated positions, obtain a most appropriate estimated position from these estimated positions, and determine the most appropriate estimated position as the final position, where all of the estimated positions The estimated position includes all estimated positions in t...

Embodiment 2

[0061] See figure 2 As shown, it is a schematic flow chart of the second embodiment of the mobile station positioning method of the present invention. In this embodiment, the main difference from the above-mentioned first embodiment is that it also obtains the TDOA measurement value from the network side, and according to the measurement After reporting information and TDOA measurement values, perform NLOS recognition, model adjustment and other related processing operations to obtain TDOA estimates, and perform positioning based on the TDOA estimates.

[0062] Such as figure 2 As shown, the mobile station positioning method in this embodiment includes the steps:

[0063] Step S201: Obtain measurement report information and TDOA measurement values ​​from the mobile communication system network side, where the measurement report information includes TOA value, TA (Timing Advance) value, path loss PL value, signal strength, and power strength Wait for information, go to step S202; ...

Embodiment 3

[0091] See image 3 As shown, it is a schematic flow chart of the third embodiment of the mobile station positioning method of the present invention. In this embodiment, the difference from the solution in the above-mentioned second embodiment is mainly that the measurement report information is also included in the measurement report in this embodiment. The TOA value is converted into a corresponding TDOA conversion value, and the above-mentioned Fang algorithm of the present invention is used for positioning estimation for these TDOA conversion values, and data fusion is performed to improve the accuracy of mobile station positioning.

[0092] Such as image 3 As shown, the mobile station positioning method in this embodiment includes the steps:

[0093] Step S301: Obtain measurement report information and TDOA measurement values ​​from the mobile communication system network side, where the measurement report information includes TOA value, TA value, PL value, signal strength, po...

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Abstract

The invention relates to a traveling carriage positioning method. The method comprises the following steps: adopting an improved Fang algorithm to carry out the positioning estimation of TDOA estimation values obtained by TDOA measurement according to a measurement report obtained from a network side and the estimation values and then carry out the minimum convex closure treatment to obtain a setof estimation positions; adopting the improved Fang algorithm to carry out the positioning estimation of TDOA estimation values formed by TOA conversion and then carry out the minimum convex closure treatment to obtain a set of estimation positions; and adopting a TOA positioning mode and a Cell-ID positioning mode to respectively obtain a set of estimation positions. The improved Fang algorithm simplifies a curvilinear equation set established according to the TDOA values into a linear equation set by coordinate transformation and adopts a least square method to solve a solution. The invention can fully utilize the information of each base station to solve the position of a travelling carriage and improve the positioning precision.

Description

Technical field [0001] The present invention relates to the field of mobile communication technology, and in particular to a method for positioning a mobile station in a mobile communication system. Background technique [0002] With the popularization and development of mobile communication technology, wireless positioning technology has also received increasing attention. A common positioning method in the prior art is TDOA (Time Difference of Arrival) positioning method, which combines MS (Mobile Station, mobile station) The wireless signal of the station) is transmitted to the TDOA between the two BSs (BaseStation, base station), converted into the distance difference between the MS and the two BSs, and based on the distance difference, the hyperbola is made with the two base stations as the focus, The intersection of two or more pairs of hyperbolas is the location of the MS. [0003] The TDOA positioning methods in the prior art include Chan algorithm, Taylor sequence expansi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04B7/02
Inventor 李炯城肖恒辉陈晓民孙黎辉郑建飞赖志坚
Owner GUANGDONG PLANNING & DESIGNING INST OF TELECOMM