中文摘要：

针对无线传感器网络MAC协议中存在的能耗问题,提出了能量高效的无线传感器网络混合MAC（EEH-MAC）算法,采用基于TDMA机制的时槽系数动态调整簇内节点的时槽大小来降低数据的传输时延;同时,对部分不需要数据传输的节点不分配时槽来减少能耗;按簇内节点剩余能量系数形成时槽分配顺序来减少状态转换的能耗;在簇头之间采用CSMA/CA机制的随机分配策略进行通信。仿真结果表明,EEH-MAC协议能有效减少能耗并延长网络生命周期。

英文摘要：

Aiming at energy consumption for MAC protocol in wireless sensor networks（WSNs）, an energy- efficient hybrid MAC algorithm for WSNs called EEH - MAC is proposed. It adopts time - slot factor based on TD- MA to adjust slot size to reduce data transmission delay and allows a longer sleep time for the part of nodes which have no data transmission to save energy. At the same time, a slot order is formed by the residual energy coefficient to reduce the state conversion energy consumption. It uses CSMA/CA mechanism to communicate with cluster heads. Simulation results show that EEH - MAC can reduce energy consumption and prolong net- work lifetime.