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Medium Access Control (MAC) is an important technique that ensures the successful operation of WSN because it controls the radio's activity of sensor nodes, which consumes node's major energy. MAC protocols must be energy efficient in wireless sensor networks. In this paper, we study MAC protocols for WSNs, including schedule-based protocols such as TDMA and contention-based protocols such as S-MAC...
MAC protocol is the major consumer of sensor energy because it controls the activity of wireless radio of sensor nodes directly. The energy efficiency of MAC protocol makes a strong impact on the network performance. TDMA-based MAC protocol is inherently collision free, and can rule out idle listening since nodes know when to transmit. But traditional TDMA protocol is not suitable for event driven...
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