Chi-square measure and sensitivity rule based wireless local area network indoor positioning method

A technology of wireless local area network and chi-square distance, which is applied in the direction of location information-based services, positioning, wireless communication, etc., and can solve problems such as ignoring relative distances

Inactive Publication Date: 2015-11-11
DALIAN UNIV OF TECH
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Problems solved by technology

[0014] However, in the wireless local area network indoor positioning practice, the measurement method of the Euclidean distance method only considers the absolute distance between the RSSI vectors of each actual location point, and often ignores the relative distance between the RSSI vectors of each actual location point; and can only assign the same value to each AP. the weight of

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  • Chi-square measure and sensitivity rule based wireless local area network indoor positioning method
  • Chi-square measure and sensitivity rule based wireless local area network indoor positioning method
  • Chi-square measure and sensitivity rule based wireless local area network indoor positioning method

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Embodiment Construction

[0046] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0047] Our experiment is carried out in the corridor on the second floor of Area C, Innovation Park Building, Dalian University of Technology. The experimental area includes a long corridor, two short corridors, several offices and laboratories.

[0048] A total of 6 APs are arranged in the experimental area. The specific information of the APs is 1 TP-LinkTL-WR340G+54M single-antenna wireless broadband router, 2 Cisco WRVS4400N gigabit three-antenna routers, and 3 Cisco RV180WWireless-N multi-function routers. The APs used in the experiment are 6 APs arranged, and the reference points and test points are at image 3 Select within the area marked in yellow.

[0049] The actual measurement equipment is an Atumu X20A-W125 netbook equipped with D-LinkDWA-125 wireless network card and Netstumbler acquisition s...

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Abstract

The invention discloses a chi-square measure and sensitivity rule based wireless local area network indoor positioning method for positioning indoor personnel / assets in a wireless local area network environment, and belongs to the technical field of wireless communication. The conventional measuring mode of a classic European style distance method in positioning actual application only takes the absolute distance between RSSI vectors of each actual position point into consideration and often ignores the relative distance between the RSSI vectors of each actual position point, and each AP can only be endowed with the same weight. For the purpose of overcoming the defects in the European style distance method, the method brought forward by the invention involves, first of all, establishing fingerprint information of reference points and fingerprint information of test points by use of position fingerprint information, then correcting each weight by use of chi-square measure which better reflects the relative distance between the feature vectors through combination with sensitivity rules, obtaining the contribution of each AP in a current positioning environment in a positioning system and then calculating the position of a point to be positioned according to the fingerprint information of each reference point by use of the chi-square measure after weighing.

Description

technical field [0001] The invention belongs to the technical field of wireless communication. The invention is a wireless local area network indoor positioning method based on chi-square distance and sensitivity rule, which is suitable for indoor personnel / asset positioning under the wireless local area network environment. Background technique [0002] Today, with the rise of smart phones and tablet computers, location-based services (LBS) have attracted more and more IT companies to participate in the design of positioning systems. Traditional positioning services usually come from GPS or base station signals. Although the positioning accuracy of GPS can reach 1 to 2 meters, the GPS signal will become very weak when the user enters the indoor environment. Although the base station signal can be obtained from any environment, the positioning error is often greater than 1 kilometer. Therefore, in order to meet the needs of indoor positioning systems (such as large undergr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/04G01S5/06
CPCH04W4/04G01S5/021G01S5/0257G01S5/06
Inventor 王洪玉陶峥王洁宋强刘宝金许烨
Owner DALIAN UNIV OF TECH
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