摘要
移动无线传感器网络因为传感器节点具有自主移动能力而使网络无法持久保持稳定的连通性,导致网络长时间处于被分割成多个局部子网的状态.通过对网络动态分割的深入研究,从物理层、链路层分析产生网络分割的原因,定义网络分割时间比、网络分割度和网络承载率等指标,量化地分析了网络分割问题.通过仿真实验得到的大量实验数据,揭示出移动无线传感器网络连接在网络分割方面的两个特征:网络分割时间比与节点数目呈反比,网络承载率与网络分割度的稳定性呈正比.研究结果既可为无线传感器网络的实际应用提供依据,又可为上层协议的研究提供有价值的参考.
Because of the autonomous mobile sensor nodes which make the network unavailable to sustain stable connectivity,permanently,wireless mobile sensor network is separated into many local subnets persistently.Based on the in-depth study on the dynamic separation of the network,the reasons why the net separation has to be done are analyzed in view of physics and links.Defining the net separating time ratio,degree of net separation and loading rate of network,the net separation is discussed quantitatively.Lots of simulative data revealed that there are two features of the net separation,i.e.,the net separating time ratio is inversely proportional to the number of nodes and the loading rate is directly proportional to the stability of the degree of net separation.The results of the study will provide a reference for not only the application of wireless mobile sensor networks but also the study on upper layer protocols.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第1期36-39,共4页
Journal of Northeastern University(Natural Science)
基金
教育部高等学校科技创新工程重大项目培育资金资助项目(708026)
关键词
移动无线传感器网络
网络连通性
网络连接拓扑
网络分割度
网络承载率
wireless mobile sensor network
network connectivity
network topology
degree of net separation
loading rate of network
