Wireless sensors are battery-limited sensing and computing devices. How to prolong the lifetime of wireless sensors becomes an\r\nimportant issue. In order to reduce the energy consumptions when nodes are in idle listening, duty-cycle-based MAC protocols are\r\nintroduced to let node go into sleep mode periodically or aperiodically. The long duty cycle makes sensors increase the transmission\r\nthroughput but consumes more energy. The short duty cycle makes sensors have low energy consumption rate but increases the\r\ntransmission delay. In this paper, a dynamic traffic-aware MAC protocol for energy conserving in wireless sensor networks is\r\nproposed. The proposed MAC protocol can provide better data transmission rate when sensors are with high traffic loading. On\r\nthe other hand, the proposed MAC protocol can save energy when sensors are with low traffic loading. Simulation results show\r\nthat the proposed protocol has better data throughput than other duty-cycle-based MAC protocols, for example, S-MAC and UMAC.\r\nWe also developed a set of comprehensive experiments based on the well-known OMNET++ simulator and revealed that\r\nour proposed TA-MAC performs significantly outstanding than related schemes under various situations.
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