基于发送功率的无线网络可靠性分析  

Analysis of wireless network reliability based on transmission power

作　　者：姜禹[1] 胡爱群[1] 何明[1] 

机构地区：[1]东南大学信息科学与工程学院,南京210096

出　　处：《东南大学学报（自然科学版）》2009年第3期431-435,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家高技术研究发展计划(863计划)资助项目(2007AA01Z432)

摘　　要：为了快速准确地评估无线网络的可靠性,使用W eibull函数提出了一种基于发送功率的无线网络链路存在的概率模型.在已知节点发送功率和节点间距离的情况下,得到无线网络中各节点间链路存在的概率,进而得到各种拓扑存在的概率.并针对每种拓扑分布分别使用两终端可靠性的求解方法,得到无线网络的可靠性.仿真结果表明:当无线节点的可传输距离小于节点间直线距离时,网络可靠性为0;当无线节点的可传输距离大于节点间3倍直线距离时,链路完全可靠,网络可靠性由节点可靠性决定;当无线节点的可传输距离在前两者之间时,网络可靠性随着节点发送功率的增加而增加.该模型为现实中无线网络两终端可靠性的设计评估和无线功率资源的有效分配提供了有效的方案.In order to estimate wireless network reliability in a fast and accurate way, a probability model of link existence based on the transmission power is presented with the Weibull function. The link existence probability and the topology existence probability in the wireless network are obtained with the known node transmission power and the distance between the node pairs. According to each topology distribution, the wireless network reliability is calculated by the two-terminal reliability method based on the proposed model. The experimental results show that when the nodes＇ transmission distance is less than the crow-fly distance between the nodes, the wireless network reliability is zero. When the transmission distance is more than 3 times the crow-fly distance, the links are completely reliable and the network reliability is decided by the node reliability. When the transmission distance is between the above two cases, the network reliability increases with the node transmission power. The proposed model provides an efficient scheme for the design of two-terminal reliability in wireless networks and the distribution of the wireless power resource.

关 键 词：网络可靠性 无线网络 发送功率 

分 类 号：TN913.2[电子电信—通信与信息系统]