A wireless AP positioning method for urban underground utility corridors
A technology that integrates pipe corridors and positioning methods. It is applied to services based on location information and services based on specific environments. It can solve the problems of heavy collection workload and poor positioning effect, and achieve good positioning performance, reduced workload, and high Effect of Performance Positioning Effect
Active Publication Date: 2022-04-22
中建五局城市运营管理有限公司
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[0006] The purpose of the present invention is to provide a wireless AP positioning method for urban underground utility corridors, aiming to solve the problems of large collection workload and poor positioning effect in the off-line acquisition stage of the general location fingerprint method in the utility corridor environment. The specific technical scheme is as follows :
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Embodiment 1
[0039] A wireless AP positioning method for an urban underground comprehensive utility gallery, in which a plurality of wireless APs are distributed along a longitudinal arrangement in the urban underground comprehensive utility gallery, and the positioning method includes an offline collection stage and an online positioning stage;
[0040] The off-line collection stage is:
[0041] Step 1: Select one of multiple wireless APs as the reference wireless AP, divide the coverage of the reference wireless AP into area A and area B symmetrically, collect location fingerprint information from multiple collection points in area A, and Obtain the location fingerprint information of each collection point in Area B, so as to obtain the location fingerprint information within the coverage area of the reference wireless AP;
[0042] In the coverage area of a single wireless AP, it can be divided into A zone and B zone symmetrically according to the axis where the signal strength of th...
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The invention provides a wireless AP positioning method for urban underground utility corridors. The positioning method includes an offline acquisition stage and an online positioning stage; The coverage area is symmetrically divided into Area A and Area B. The location fingerprint information of multiple collection points in Area A is collected, and the location fingerprint information of each collection point in Area B is obtained according to the symmetry, so as to obtain the location within the coverage area of the reference wireless AP. The location fingerprint information; the location fingerprint information of the rest of the wireless AP coverage area is obtained according to the actual distance between each wireless AP and the reference wireless AP, so as to obtain the offline location fingerprint database; in the online positioning stage, the K nearest neighbor algorithm is used to obtain the positioning coordinates. In the offline acquisition stage, the coverage of the reference wireless AP is divided into Area A and Area B. Only the location fingerprint information of Area A is collected, which greatly reduces the workload of collection.
Description
technical field [0001] The invention relates to the technical field of indoor positioning, in particular to a wireless AP positioning method for urban underground utility corridors. Background technique [0002] The location fingerprint-based WLAN indoor positioning technology uses the location fingerprint database established in the offline stage, that is, the location fingerprint map (Radio-map) to describe the mapping relationship from the RSS signal space to the physical space. In the online stage, the position fingerprint positioning algorithm is used to calculate the positioning results. This technology can achieve high positioning accuracy under non-line-of-sight (NLOS) conditions, and can meet the needs of most LBS (location-based services) in indoor environments without requiring additional hardware equipment . [0003] Therefore, WLAN indoor positioning technology based on location fingerprint has become the main research direction in the field of location awaren...
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IPC IPC(8): H04W4/02H04W4/021H04W4/33
CPCH04W4/021H04W4/023H04W4/025H04W4/33
Inventor 熊剑向阳李龙常刘鸣珂卢洪波廖继文彭万军盛建武陶加佳吴浩盘宏斌
Owner 中建五局城市运营管理有限公司