摘要： 为减少节点能耗和提高信道利用率，提出一种基于分簇结构的无线传感器网络MAC节能算法(EEC-MAC)。在TDMA机制的基础上，采用时隙系数动态调整簇内节点的时隙大小，降低数据的传输时延。对于部分不需要数据传输的节点不分配时隙，使其拥有较长的睡眠时间来节约能量。簇内节点按其剩余能量系数形成时隙分配顺序，减少状态转换的能耗。簇间节点采用基于CSMA/CA机制的随机分配策略实现通信。仿真结果表明，EEC-MAC节能效果较好，具有较小的平均通信时延和较长的网络生命周期。
关键词:
无线传感器网络,
介质访问控制,
分簇,
节能算法,
时隙分配
Abstract: In order to reduce node energy consumption and improve channel utilization, an energy-efficient Medium Access Control(MAC) algorithm based on cluster for Wireless Sensor Network(WSN) called EEC-MAC is proposed. It adopts time-slot factor based on TDMA 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, and forms a slot order 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 EEC-MAC has a better energy saving, a smaller average network delay and a longer lifetime.
Key words:
Wireless Sensor Network(WSN),
Medium Access Control(MAC),
clustering,
energy-efficient algorithm,
slot allocation
中图分类号:
掌明, 王经卓, 董自健. 基于分簇的无线传感器网络MAC节能算法[J]. 计算机工程, 2012, 38(15): 70-73.
ZHANG Meng, WANG Jing-Zhuo, DONG Zi-Jian. MAC Energy-efficient Algorithm in Wireless Sensor Network Based on Clustering[J]. Computer Engineering, 2012, 38(15): 70-73.