Energy Analysis of Received Signal Strength Localization in Wireless Sensor Networks

This paper presents an investigation of energy demands during localization of wireless nodes in ad-hoc net- works. We focus on the method based on the received signal strength (RSS) to estimate the distances between the nodes. To deal with the uncertainty of this technique, statistical methods are used. It implies more measurement samples to be taken and consequently more energy to be spent. There- fore, we investigate the accuracy of localization and the con- sumed energy in the relation to the number of measurement samples. The experimental measurements were conducted with IRIS sensor motes and their results related to the pro- posed energy model. The results show that the expended en- ergy is not related linearly to the localization error. First, improvement of the accuracy rises fast with more measure- ment samples. Then, adding more samples, the accuracy in- crease is moderate, which means that the marginal energy cost of the additional improvement is higher.

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