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Energy is a limiting factor in the successful deployment of ad hoc networks since nodes are expected to have little potential for recharging their batteries. In this paper, the authors investigate the energy costs of wireless communication and discuss the mechanisms used to reduce these costs for communication in ad hoc networks. They then focus on specific MAC layer protocols can save energy by suspending the communication device during short-term idle periods in communication that aim to reduce energy consumption during both active communication and idle periods in communication.
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