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一直以来,能量有效都是无线传感器网络MAC协议的研究重点。其中能量有效性比较好的如SMAC协议,采用周期性的睡眠机制可以很好的节约能量。然而,在SMAC协议中可能会由于一些节点遵守多个睡眠时间表,这就造成他们比其他节点更高的唤醒频率。因此,修改了原来的SMAC协议,使得所有节点尽可能的遵守一个时间表。修改后的协议延长网络的生存时间。通过仿真实验证明,该协议明显的提高网络寿命。
All along, the energy-efficient wireless sensor network MAC protocol research focus. Energy efficiency is better, such as the SMAC protocol, the use of periodic sleep mechanism can be a good energy saving. However, it is possible that some nodes follow multiple sleep schedules in the SMAC protocol, which causes them to wake up more frequently than other nodes. Therefore, the original SMAC protocol has been modified so that all nodes follow a schedule as closely as possible. The revised agreement to extend the network’s survival time. Simulation results show that the protocol obviously improves network lifetime.