基于无线传感网的数据传输优化算法研究  

Optimization algorithm for data transmission based on wireless sensor network

作　　者：孟超[1] 金龙 孙知信[1] MENG Chao;JIN Long;SUN Zhixin(School of Modem Posts ＆ Institute of Modem Posts, Nangjing University of Posts and Telecommunications, Nangjing 210003, China;National Engineering Laboratory for Logistics Big Data Exchange and Sharing, YTO Express ,Shanghai 201705, China)

机构地区：[1]南京邮电大学现代邮政学院,江苏南京210003 [2]圆通速递物流大数据互通共享国家工程实验室,上海201705

出　　处：《南京邮电大学学报（自然科学版）》2018年第3期65-71,共7页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(61373135;61672299);江苏省高校自然科学面上项目(16KJB520033);南京邮电大学科研启动基金(NY214024)资助项目

摘　　要：传感网中感知节点数量庞大,网络运行时间较长,采样数据较多,形成了传感网络大数据。由于感知节点所具有的能量和通信能力等都十分有限,因此设计有效的传输优化算法,利用有限资源高效地完成大数据传输的任务,成为无线传感器网络设计所面临的一大挑战。文中利用位图传输法估算出无线链路的数据包接收率(Packet Reception Ratio,PRR),通过接收率计算出无线链路的平均数据传输次数。在此基础上提出集中式路由选择算法,找出从所有感知节点到sink的最优路径,确保最优路径中的链路平均传输次数的和达到最小。根据传感网的分布式环境,将集中式算法进行了改进,提出路由选择算法的分布式施行方案,找出最小的平均传输次数的最优路径,最小的传输次数意味着最小的能量消耗,该研究对于能量有限的无线传感网具有重要现实意义。最后实验证明文中的传输优化模型具有较高的性能和可行性。Thousands of devices as well as sensors are spread in specific areas to collect all kinds of physical information. Because the number of nodes is very large and nodes commonly have limited energy and communication ability, designing efficient transmission algorithms for wireless sensor networks （WSNs） to complete various tasks with limited resources has become a challenge in WSNs. The data packet reception ratio （PRR） of the wireless link is estimated by the bitmap data transmission method, and the expected transmission counts of the link are calculated by PRR. Based on it, the route selection algorithms are proposed to find out the most optimal path from the sensory node to the sink. The optimal path ensures that the sum of the expected transmission counts of the link is minimum, meaning minimal energy consumption. The study of WSNs with limited energy and communication ability is of practical significance. Finally, the real experimental results indicate that all the proposed models have high performance and high degree of feasibility.

关 键 词：物联网 无线传感网 优化算法 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]