利用发送和接收时隙分配策略改善无线传感器网络 MAC 协议能效.

For the issue that data conflict and overhearing existing in wireless sensor network will impact energy efficiency of the MAC protocol, this paper proposed a transmit-based and receive-based slot allocation strategy of TDMA-MAC. It calculated the energy consumption of WSN by considering different times of cost of wireless transceiver pattern (sending, receiving, dormancy and leisure).Suppose WN packet interval in clustering was exponential distribution, two-stage TDMA method was used to implement the evaluation of multi-step clustering. It verified the effectiveness of proposed model by simulation done by OPNET Modeler. Simulation results show that the energy efficiency of receive-based SAS is five times as well as transmit-based. Proposed protocol saves 4.3% energy and reduces 0.35 ms delay comparing with hybrid TDMA/CDMA protocol based on clustering. It saves 10.8% energy and reduces 1 ms delay comparing with hybrid TDMA/CDMA protocol based on clustering. [ABSTRACT FROM AUTHOR]