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Distributed wireless fingerprint positioning method free of off-line training

A fingerprint positioning and offline training technology, applied in positioning, wireless communication, wireless communication services and other directions, can solve problems such as hindering the popularization and application of fingerprint positioning method, large workload of fingerprint database maintenance, high power consumption, etc. The effect of small amount of data and stable system

Inactive Publication Date: 2016-06-15
ZHEJIANG UNIV CITY COLLEGE +1
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AI Technical Summary

Problems solved by technology

2) The power consumption caused by the computational complexity is large, which limits the use of the fingerprint matching method on some terminals. 3) The establishment of the RadioMap in the offline stage of the fingerprint method takes a lot of time and energy. Later, due to environmental changes, or some The damage and increase of some AP nodes, and the need to re-establish RadioMap, the maintenance workload of the entire fingerprint database is huge
The above reasons have hindered the popularization and application of fingerprint location method

Method used

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  • Distributed wireless fingerprint positioning method free of off-line training
  • Distributed wireless fingerprint positioning method free of off-line training
  • Distributed wireless fingerprint positioning method free of off-line training

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Experimental program
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Embodiment Construction

[0018] figure 1 It is an overall flow chart of the present invention, and the basic steps are as follows:

[0019] 1. Fingerprint library establishment stage:

[0020] In the present invention, the step of collecting the fingerprint library is still used, but the RadioMap of this method no longer uses the reference point, but collects the signal strength RSSI value of the adjacent anchor node at each anchor node, and redundantly distributes the results to the surrounding k on the anchor node. There is no need for offline information collection, but each anchor node sends a request message to the neighbor anchor node, and each neighbor node that receives the request calculates the signal strength, and then returns the result to the anchor node that sends the request, and the anchor node that sends the request generates Fingerprint library information f i , fingerprint library information f i Stored directly in this node and in neighboring anchor nodes.

[0021] Frequently ...

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Abstract

Provided is a distributed wireless fingerprint positioning method free of off-line training, comprising a fingerprint database establishing phase, a fingerprint coupling phase and a positioning phase, and characterized in that off-line information collection is not needed, but each anchor node sends a request message to neighbor anchor nodes; each neighbor anchor node receiving the request calculates the signal intensity, and returns results to the anchor node sending a request; the anchor node sending a request generates fingerprint database information fi which is directly stored in the node and the neighbor anchor nodes. In a positioning system, when anchor nodes are numerous and are distributed uniformly, the off-line training workload and the fingerprint database maintenance workload of the positioning system are as small as possible; in case of outage, damage or increase of specific anchor nodes, the system can work normally.

Description

technical field [0001] The present invention relates to the field of indoor wireless positioning, especially in some large indoor scenes where wireless fingerprint positioning is used. When a large number of anchor nodes are evenly distributed and the positioning system is required to have better stability and scalability, a method that can be used a positioning method. Background technique [0002] Wireless fingerprint positioning is one of the basic methods of indoor positioning at present. Generally, there are five main links: the establishment of RadioMap, clustering and block, AP (AccessPoint, here can also be an anchor node, such as a ZigBee node with known coordinates, etc.) selection , Positioning feature extraction and positioning estimation, wherein the establishment of RadioMap and clustering and partitioning belong to the offline stage, and the latter three steps belong to the online stage. In the first step, the system describes the dependence relationship betw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00H04W4/04G01S5/02
CPCG01S5/0252H04W4/04H04W64/006
Inventor 李飞高承伟郑增威魏金岭孙霖
Owner ZHEJIANG UNIV CITY COLLEGE
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