基于可用传输时间的无线网状网路由判据  

Routing Metric Based on Available Transmission Time for Wireless Mesh Networks

作　　者：孙彦景[1] 刘雪[1] 赵甫胤[1] 刘卫东[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221116

出　　处：《电子科技大学学报》2012年第6期916-920,共5页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金(50904070);中国博士后基金(20100471412);中央高校基本科研业务费专项资金(2010QNA48);江苏省青蓝工程;国家大学生创新性实验计划(101029011)

摘　　要：路由判据对无线Mesh网络(WMN)的性能至关重要,针对期望传输次数(ETX)和期望传输时间(ETT)没有考虑到802.11 MAC层的指数回退策略,不能准确评估数据包的平均传输时间问题,提出基于可用传输时间(ATT)的路由度量机制。在Linux平台上对OLSR协议进行扩展,把ATT路由判据与ETX和ETT进行实现测试比较,证明了ATT能使系统性能得到明显提高,更加适用于WMN。Routing metric is critical for performance of wireless mesh networks （WMN）. Without considering back-off scheme of IEEES02.11 in Mac layer, expected transmission count （ETX） and expected transmission time （ETT） can not evaluate the average transmission time accurately. A new available transmission time routing metric is proposed based on IEEE 802.11 DCF. We also extend OLSR protocol on Linux platform, and compare ATT with ETX and ETT. The obtained results show that the ATT metric has the lowest packet loss rate and the lowest jitter rate among the analyzed metrics, because it concerns available link bandwidth and also takes physical transmission rates into account.

关 键 词：可用传输时间 路由判据 OLSR 无线网状网 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]