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The localization is an important issue in wireless sensor networks(WSN). As one of the range-free localization algorithms, DV-Hop can be simply implemented in real WSN. To improve the accuracy of localization, three improved algorithms are proposed based on the characteristic of DV-Hop with the first one based on secondary reference node, the second one based on the node of last hop, and the third based on Max-Min method. The basic principles and the approaches of implementation of the algorithms are introduced. Localization algorithms run on a single simulation platform are compared. Analyze the three algorithms in different anchor nodes ratio scenarios, the effect of the localization error and coverage. Simulation experiments validate the correctness and the feasibility of the algorithms.
Date of Conference: 23-25 Sept. 2010