无线传感器网络中一种拥塞感知的多路径流量分配算法  

Congestion-Aware Traffic Allocation for Multi-Path Routing in Wireless Sensor Networks

作　　者：李姗姗[1] 廖湘科[1] 朱培栋[1] 彭绍亮[1] 

机构地区：[1]国防科技大学计算机学院,湖南长沙410073

出　　处：《计算机工程与科学》2008年第3期86-88,109,共4页Computer Engineering & Science

基　　金：国家973计划资助项目(2006CB303000);国家863计划资助项目(2005AA121570)

摘　　要：拥塞控制是无线传感器网络中的一个关键问题,拥塞不但增加丢包率,影响传输可靠性,而且会浪费宝贵的能量资源。本文从保证数据传输可靠性的多路径路由出发,提出了一个拥塞感知的多路径流量分配算法COTA。COTA从全网出发,基于路径的启发式信息分配流量,避免给潜在的热点区域分配过多负载。此外,繁忙节点使用可靠性相关的报文调度策略有效保证高可靠报文优先使用带宽。详细的模拟实验表明了COTA在可靠性、吞吐率等方面的优势。Congestion is an essential problem in wireless sensor networks. It causes the overall channel quality to degrade and the drop rate to rise. In this paper, we propose a congestion-aware traffic allocation （COTA） algorithm to avoid congestion. COTA is used in multipath routing to balance the traffic of the whole network. COTA uses some heuristic information to analyze the potential congestion region and avoid traversing these regions. In addition, the packet scheduling in the＂busy＂ node is based on the level of the desired reliability to guarantee the priority of packets with highly desired reliability. Comprehensive simulations have validated the distinguished performance in the several aspects of our framework.

关 键 词：无线传感器网络 拥塞避免 COTA 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]