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无线传感器网络节能算法的优化研究 被引量:6

Research on Improvement Wireless Sensor Network S-MAC Protocol
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摘要 无线传感器网络存在严重的能量约束问题,针对传统S-MAC算法存在节点冲突、固定负载设定占空比导致感器节点的能量浪费,从而导致网络生存时间短的难题。为了节约能量、延长网络的生存时间,提出一种高效、节能的媒体接入控制算法(H-MAC)。H-MAC引入数据会聚树、双调度竞争机制来改进S-MAC算法节点之间的冲突,通过将S-MAC的固定占空改为动态占位节点分配方式,使其能适应网络流量负载动态变化。最后通过NS2仿真工具对H-MAC进行了仿真。仿真结果表明,相对S-MAC来说,通过改进的H-MAC算法的节能效率提高了20%,降低了节点之间的冲突率,从而延长了整个无线传感器网络的生存时间。 Serious energy constraints exist in wireless sensor network.Traditional.S-MAC algorithm has the problems such as node conflict,the energy waste of sensor nodes caused by fixed load setting duty ratio and short network survival time.In order to save energy and prolong the network life time,a kind of efficient and energy-saving media access control(MAC) H-algorithm is put forward.H-MAC introduces the competition mechanism convergency trees and double scheduling to settle the conflicts between nodes of S-MAC algorithm,and by the dynamic allocation placeholder instead of the fixed duty of MAC–S,the network nodes can adapt to the dynamic changes of traffic load.Simulation is carried out with NS2.The results show that compared with S-MAC,the energy efficiency of the improved H-MAC algorithm is increased by 20%,and the conflict rate of between nodes is reduced,which extends the survival time of wireless sensor network.
作者 汪华斌 蔡昭权 WANG Hua-bin,CAI Zhao-quan(1.Department of Computer Science,Huizhou University,Huizhou Guangdong 516007,China;2.Educational Technology Center,Huizhou University,Huizhou Guangdong 516007,China)
出处 《计算机仿真》 CSCD 北大核心 2011年第6期 149-152,共4页 Computer Simulation
基金 惠州学院自然科学基金项目(C210.0308)
关键词 无线传感网络 能量消耗 延迟 WSN Energy consumption Latency
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