An Adaptive Environmental Modeling Localization Method in Wireless Sensor Networks

This paper presents a new localization algorithm in Wireless Sensor Networks. The RSSI (Received Signal Strength Indicator) is a localization method which provides an inexpensiveand accurate solution for localization. However the time and location based fluctuations on the RSSI values and impropermodels cause a considerable localization error in the real applications. Most of the RSSI models suppose the radio range to be circular. In the proposed method the algorithm tries to find a relation between RSSI and distance for each anchor node in each direction adaptively and produce a noncircular model. Thesimulation results show that this method can reduce amount of the localization error considerably. Also unlike to the range freemethods the proposed method can work properly in the low node densities.

Keywords:

Wireless Sensor Networks , Adaptive Localization , RSSI , AEM , Noncircular Model