中文摘要：

由于水下传感器网络能量非常有限,所以研究节能的水下传感器网络通信协议具有非常重要的现实意义。为了节省数据传输过程中消耗的能量,文中在S-MAC协议的基础上,设计了一种新的节能MAC协议,在数据传输过程中,通过引进CA-ACK自适应机制,根据信道情况,自动选择No-ACK或Imm-ACK机制,通过减少ACK确认帧的数量,减少能量的消耗。理论分析和仿真实验结果表明,SE-MAC协议有效地减少了数据传输中的能量消耗,同时也提高了网络的吞吐量。

英文摘要：

Because the energy of the underw ater sensor networks is limited,studying the energy efficient M AC protocol for underw ater sensor networks is very meaningful. In order to save the energy consumption in data transmission process,present a new type of energy efficient M AC protocol based on S-M AC. In the process of the date transmission,introduce an adaptive CA-ACK mechanism,which can reduce the number of ACK frames by choosing No-ACK or Imm-ACK automatically,so the M AC protocol can reduce the depletion of energy. Theoretical analysis and simulation results show that SE-M AC protocol can reduce the depletion of the energy,at the same time,SE-M AC can improve the throughput of the network.