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Energy-Efficient Backoff Algorithms for Wireless Sensor Networks
Abstract
A prime goal of wireless sensor networks (WSNs) is to minimize energy consumption than high channel efficiency and low channel access delay. Existing MAC protocols for WSNs reduce energy consumptions by introducing variation in an active/sleep mechanism, but they cannot save energy during the execution of backoff algorithm. In this chapter, we study and compare the different backoff algorithms for wireless sensor networks. We also use the concept of a geometrically increasing probability distribution for contention process. This allows us to introduce improved backoff (IB) algorithm for energy efficient MAC protocol in WSNs, where binary exponential backoff (BEB) based algorithm is widely used. With the help of numerical results we show that the IB gives edge over BEB in throughput, channel access delay, and energy efficiency under varying traffic conditions.
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