一种新的Ad Hoc网络拥塞定量检测方法  

New Quantitative Congestion Detection Method for Ad Hoc Networks

作　　者：吴玮[1] 张中兆[1] 沙学军[1] 秦丹阳[1] 

机构地区：[1]哈尔滨工业大学通信技术研究所,哈尔滨150080

出　　处：《科学技术与工程》2009年第17期4955-4959,共5页Science Technology and Engineering

基　　金：国家重点基础研究发展计划(973)(2007CB310601)资助

摘　　要：Ad Hoc网络是一种自行组织的无线网络,网络中各节点不仅可以作为无线终端,而且可以作为路由器,为其他节点转发数据。因此,某些节点成为多个数据流的交汇点,从而在这些节点处形成拥塞。拥塞会造成Ad Hoc网络的丢包率增大,时延增大,开销增加和吞吐量降低。拥塞检测是拥塞处理的先决条件。提出了一种新的Ad Hoc网络拥塞定量检测方法——拥塞趋势度方法。通过节点缓冲区达到完全满载的速度来测量节点的拥塞程度和变化趋势;与其他拥塞检测方法进行仿真比较分析,结果显示提出的定量检测方法比其他的方法更能准确的测量出当前拥塞程度,而且可以体现出拥塞的变化趋势,为进一步进行拥塞处理提供准确的信息。Ad Hoc networks are self-organized wireless networks. The nodes in Ad Hoc networks can serve as wireless terminals and routers, so some of them may become the junctions of several flows, and these nodes are very likely congested. Congestion may lead to long delay, high overhead and low throughput in wireless Ad Hoc networks. Congestion detection is the precondition of congestion control. A new quantitative congestion detection method for Ad Hoc networks is proposed. In this method, congestion level and change tendency are measured by the rate of getting buffer full loaded. The simulation results show that our method can not only measure the current congestion level more accurately than others, but also show the congestion change tendency, provide exact information to realize efficient congestion control.

关 键 词：AD HOC网络 拥塞检测 拥塞趋势度 

分 类 号：TN915.07[电子电信—通信与信息系统]