According to analyzing the facade phenomenon of wireless sensor networks(WSNs), this paper proposes a feasible method to state clearly and improve the power control efficiency of wireless sensor networks(WSNs). One of the crucial problems for WSNs is the design of medium access control (MAC) protocol. Our method wants to adjust the activities of the MAC protocols control to achieve the enery conservation when the wireless com-munication module of sensor nodes is running, which is the major consumer of energy consumed by sensors’ energy. The energy efficiency of MAC protocol makes a strong impact on the network performance. To some extent,our research work describes and analyzes the sources of energy consumption in the MAC layer and simultaneously presents an optimal method for the design of MAC protocol. Then we discusses some factors impacting on the performance of MAC protocol and metrics of performance evalua-tion. Eventually, the coming research direction is summarized.
