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。
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.
出处
《计算机工程》
CAS
CSCD
2012年第15期70-73,共4页
Computer Engineering
基金
国家自然科学基金资助面上项目(61174013)
江苏省高校自然科学基金资助项目(BK20110398
08KJD520003)
江苏省高校科研成果产业化推进基金资助项目(JHB2011-61)
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
Wireless Sensor Network（WSN）
Medium Access Control（MAC）
clustering
energy-efficient algorithm
slot allocation
