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
CN105682224AInactive Publication Date: 2016-06-15ZHEJIANG UNIV CITY COLLEGE +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV CITY COLLEGE
Publication Date
2016-06-15
Estimated Expiration
Not applicable Β· inactive patent

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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.
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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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