摘要
当无线传感器网络应用于智能家居时,由于无线信号阴影衰落的存在,使得链路状态稳定性较差,会导致网络中数据包投递率低、时延高以及开销大等问题。为解决上述问题,提出一种基于链路状态感知的智能家居路由算法。引入预计传输次数的概念用于评估链路稳定性,根据实际投递情况实时快速预测其后续时刻的值,通过预测所得的预计传输次数自适应调整路由过程,避开衰落链路,优化网络性能。仿真结果表明,该算法在阴影衰落条件下,能够有效增大数据包投递率并降低路由开销。
When applying the wireless sensor network to smart home system,the unstable wireless links caused by the shadow fading may result in poor network performance,such as low packet delivery ratio,high latency and routing overhead.To solve these problems,a kind of link-state-aware routing algorithm for wireless sensor network in smart home was proposed.The concept of expected transmission count for smart home(ETX-SH)was introduced to evaluate the stability of the link.By the real-time updating mechanism based on actual delivery process,it predicted the future link stability.The predicted ETX-SH as the route metric was used to avoid the fading links and adjust routing strategy adaptively.Simulation results show that the proposed routing algorithm can increase the packet delivery ratio,and reduce the routing overhead efficiently in the shadow fading environment.
作者
徐金鹏
李晓卉
丁月民
张尉
张震
XU Jin-peng;LI Xiao-hui;DING Yue-min;ZHANG Wei;ZHANG Zhen(College of Information Science and Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;School of Computer Science and Engineering,Tianjin University of Technology,Tianjin 300384,China;Institute of Agricultural Mechanization Sciences,Wuhan Academy of Agricultural Sciences and Technology,Wuhan 430345, China;Shenzhen Newding Network Technology Limited Company,Shenzhen 518040,China)
出处
《计算机工程与设计》
北大核心
2018年第10期3001-3006,共6页
Computer Engineering and Design
基金
国家自然科学基金项目(61702369)
天津市科委面上基金项目(15JCYBJC52400)
