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Terminal group co-locating method

A technology of co-location and terminal group, applied in electrical components, wireless communication and other directions, which can solve problems such as large positioning error

Inactive Publication Date: 2011-08-10
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a method for coordinated positioning of terminal groups to overcome the defect in the prior art that the mobile station cannot establish connections with 3 or more line-of-sight base stations and cause relatively large positioning errors

Method used

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  • Terminal group co-locating method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0070] Figure 5 It is a schematic diagram of the scene of Embodiment 1. exist Figure 5 In the topological structure of , A, B, C, and D are four base stations, and four wireless terminals H, E, F, and K form a terminal group. Wireless terminal H communicates with base station A and base station D, wherein base station A also communicates with wireless terminal E, and base station C and base station D communicate with wireless terminals F and K respectively. According to the steps of the search and positioning algorithm according to the content of the invention, the process of positioning the four wireless terminals is as follows:

[0071] 1) Initialization:

[0072] The wireless terminal connected to the two base stations in this embodiment is the wireless terminal H. Wireless terminal H communicates with base station A and base station D, so the distance between it and the two base stations is known, and the geographic location of the base station is known. Through geom...

Embodiment 2

[0093] Figure 7 It is a schematic diagram of the scene of Embodiment 2. exist Figure 7 In the topological structure of , A, B, and C are three base stations, and three wireless terminals U, V, and W form a terminal group. Wireless terminal U communicates with base station A and base station B, wherein base station B also communicates with wireless terminal V, and base station C communicates with wireless terminal W. According to the steps of the search and positioning algorithm according to the content of the invention, the process of positioning the three wireless terminals is as follows:

[0094] 1) Initialization:

[0095] The wireless terminal connected to the two base stations in this embodiment is the wireless terminal U. The wireless terminal U communicates with the base station A and the base station B, and two candidate locations U1 and U2 of the wireless terminal U can be obtained through traditional positioning methods. The set of candidate positions defining...

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Abstract

The invention discloses a terminal group co-locating method, comprising the following steps: A, acquiring wireless terminals communicated with at least two base stations in a terminal group, and locating the wireless terminals by the information of the two base stations; B, with respect to the candidate location aggregation of each wireless terminal, judging whether the candidate location of one wireless terminal is valid before locating the next wireless terminal, and removing the candidate location from the candidate location aggregation if the wireless terminal is invalid; C, taking out thecandidate locations from the candidate location aggregations in sequence by using the previous wireless terminal completed in locating, and locating the location of the next wireless terminal based on the candidate location, the location coordinate of the base station and the relative distance between the wireless terminals; and D, after completing the location of one wireless terminal, searchingthe next wireless terminal adjacent to the wireless terminal, then completing the locating of all wireless terminals in the terminal group if the wireless terminal does not exist; otherwise, turningto step B. The invention can improve the precision and robustness of wireless locating.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a terminal group coordinated positioning method. Background technique [0002] The traditional cellular positioning method usually requires that the mobile station must establish a connection with 3 or more base stations (also known as beacon nodes) in order to measure TOA (Time OF Arrival, time of arrival) / TDOA (Time Difference of Arrival, time difference of arrival) ) / RSS (Relative Signal Strength, relative signal strength) and other parameters, and then determine the location of the mobile station through these parameters and the location of the base station. The base station refers to a device whose geographic location is known and fixed, and at the same time, can communicate with the mobile station. According to whether the measurement distance between the mobile station and the base station includes non-line-of-sight error, the base station can be di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00
Inventor 崔琪楣张一衡陶小峰许晓东张平
Owner BEIJING UNIV OF POSTS & TELECOMM