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Locating method in wireless LAN and device thereof

A technology of a wireless local area network and a positioning method, applied in the field of positioning methods and devices in a wireless local area network, can solve problems such as long physical distance, and achieve the effects of reducing large errors and improving accuracy and reliability

Active Publication Date: 2009-11-04
NEW H3C TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0006] Based on the above analysis, it can be found that the problem of the existing technology is that, in view of the complexity of the indoor wireless signal distribution, the physical distance between the individual nearest neighbor points calculated by the nearest neighbor method and the real position may be relatively long, and a large position deviation may easily occur.

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  • Locating method in wireless LAN and device thereof
  • Locating method in wireless LAN and device thereof
  • Locating method in wireless LAN and device thereof

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Embodiment Construction

[0044] In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] The invention provides a positioning method in a wireless local area network to optimize the existing nearest neighbor algorithm. In the existing nearest neighbor algorithm, there may be a large distance between the physical position and the real position between the calculated position to be determined. Once this happens, it may cause larger positioning errors. In order to solve the situation of large physical position deviation that may occur in the use of the nearest neighbor algorithm, the present invention provides a positioning method to eliminate the positioning points with a small probability obtained by the nearest neighbor algorithm, so that the probability of positioning accuracy highest. Specifically, t...

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Abstract

The invention discloses a locating method in a wireless LAN and a device thereof. The locating method comprises the following steps: acquiring a sample set composed of a plurality of sample points closest to the location to be determined according to a nearest neighbor algorithm; acquiring central positions of the sample points in the sample set, and the distance between the sample points and the central positions; judging whether the sample points with the distance from the central positions which is more than a preset standard exist, if yes, deleting the sample points with the distance from the central positions which is more than the preset standard from the sample set, and returning to the previous step; otherwise continuing to the next step; and determining the location to be determined according to the various sample points included in the sample set. The locating method in the wireless LAN and the device thereof help improve precision and credibility of locating results in the wireless LAN.

Description

Technical field [0001] The present invention relates to the field of network technology, in particular to a positioning method and device in a wireless local area network. Background technique [0002] With the widespread application of WLAN (Wireless Local Area Network, wireless local area network), WLAN systems are deployed in more and more places to realize effective wireless data communication services. In view of the characteristics of wireless signal transmission, at different distances, wireless signals show different strengths. Therefore, the difference in signal strength from Station (terminal) to multiple APs (Access Points) can be used to achieve certain accuracy. Wireless positioning. At the same time, because GPS (Global Position System, global positioning system) signals cannot penetrate buildings and cannot be used indoors, the WLAN positioning system can be used for corresponding purposes. The indicator of wireless signal strength is RSSI (Radio Signal Strength In...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W84/12
Inventor 计光
Owner NEW H3C TECH CO LTD
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