跳时超宽带无线传感网生存期的上界  

Upper Bound on Lifetime of Time Hopping Ultra Wide Band Wireless Sensor Network

作　　者：徐娟[1] 郭爱煌[1] 赵晓群[1] 

机构地区：[1]同济大学电子与信息工程学院,上海200092

出　　处：《同济大学学报（自然科学版）》2008年第3期388-391,共4页Journal of Tongji University:Natural Science

摘　　要：生存期是跳时超宽带无线传感网的一个关键参数.考虑了由n个随机分布在面积为S圆上的传感节点和一个汇聚节点组成的跳时超宽带无线传感网,利用Vapnik-Chervonenkis定理和正六边形棋盘格子覆盖传感区域,推导出了当某个源传感节点发射包含R比特的数据分组通过多跳方式到达汇聚节点时的能量消耗下界.基于能耗与生存期的关系,给出了跳时超宽带无线传感网生存期的上界.研究结果表明,跳时超宽带无线传感网生存期的上界与节点密度n/S的(α-1)/2次方成正比(α为路径损耗指数).因此,大规模密集跳时超宽带传感网更有实用价值.The lifetime is a critical parameter for time hopping ultra wide band （TH-UWB） wireless sensor networks. Based on a TH-UWB wireless sensor network with n sensor nodes which are randomly located on a disk of area S and a sink node, the lower bound on the energy dissipation of some sensor node transmitting one data packet containing R bits to the sink node by multihop fashion is derived on the basis of Vapnik-Chervonenkis theory and hexagon te.~sellation covering sensor region. Then the upper bound on the lifetime of TH-UWB wireless sensor networks is obtained based on the relation of the lifetime and energy dissipation. The result indicates the upper bound on the lifetime of TH-UWB wireless sensor networks is in proportion to the （α - 1）/2 order of the node density n/S, where α is the path 1oss exponent. Thus, the large-scale dense TH-UWB wireless sensor network is more practical.

关 键 词：无线传感网 超宽带 生存期 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]