Node Localization Using Range-free Model in Mobile Sensor Networks
نویسنده
چکیده
Presently, the developments made in Wireless Sensor Networks are increasing the popularity in several applications like military applications etc. Sensor node localization is a highly desirable capability for wireless sensor network applications. Localization issue is very important, when positions of nodes are not known. In this paper, we make an attempt in localization issue. An efficient and novel range-free approachis introduced. This work is initiated by analyzing a range-free localization algorithm for mobile sensor networks. The mobile sensor networks consist of normal nodes, anchor nodes and sensor nodes. Anchor nodes are assumed to be mobile whereas the sensor nodes are stationary. Each anchor node broadcasts beacon signals to its neighbour node and they are received by the one hop distanced nodes. And the mobile node which receives this beacon signal has different Received Signal Strength because of variation in distances. The location of nodes can be approximately found using a detailed analysis on the beacon signals. A possible region of node a location is a region which covers node a location.The smaller possible region provides high localization accuracy. An experimental result proves the efficiency of the proposed algorithm. KeywordsMobile sensor networks, Anchor nodes, Range-free model, Beacon signal and Localization.
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