Wireless LAN Physics Location Technology Research

As a new network technique,IEEE802.11 WLAN has disseminated quickly these years,but it still has a few security problems to solve. In this case,we does not only need to develop the security technique quickly,in order to enhance the security of WLAN itself,but also needs to punish illegal acts in WLAN. As the particularity of wireless network,Location Determination technique for llegal host computer becomes a clamant needs.The current model of wireless LAN physical location because of signal interference are often affected by environmental factors, difficult to accurately describe the signal strength and range of changes and the impact of positioning accuracy. In light of these problems based on the design of environmental factors and the model based on the location of the targeted model interpolation, the model can accurately describe the signal strength and distance, the relative changes in laws, which make up the signal strength fluctuations caused by the deviation, and by adjusting the ratio of decay by Better than the traditional method of accuracy, while reducing the traditional model of the complexity of the sample.Based on environmental factors in the physical location model, the use of asymmetric positioning of the three nodes derived three detectors between the best and reliable detection range from the largest radius. , In an asymmetric positioning of the three models used in the dynamic adjustment of environmental factors on the method for calculating each node to achieve anywhere layout detection.Interpolation model based on the position adopted by fixed location sampling. According to the three detectors signal strength and distance, the relative change in the actual environment of dynamic adjustment, find invasion node quickly.