基于链路层反馈的DYMO性能分析  

Performance Analysis of DYMO Based on Link Layer Feedback

作　　者：王彬[1] 武穆清[1] 罗大勇[2] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876 [2]天津电力公司电力通信分公司,天津300010

出　　处：《通信技术》2010年第2期113-115,共3页Communications Technology

基　　金：国家自然科学基金项目(项目批准号:60772109)资助

摘　　要：DYMO协议是一种新兴的无线移动自组织网络路由协议,但DYMO协议草案并没有规定如何实现链路的监测;而有一部分的丢包是由于路由协议对断路反应迟钝造成。针对以上两个问题,文章提出将链路层反馈机制作为DYMO协议链路监测机制,并通过仿真验证了在小流量场景下,链路层反馈机制使DYMO协议大大降低了对断路的感知时延,及早地通知网络中使用该断路的节点,降低了因节点使用失效路由而导致丢失的分组数量。DYMO is a novel routing protocol of MANET. However, it has not specified how to monitor the link, and part of dropped packets is due to the insensitive reaction of the routing protocol to broken link. In view of the above, this paper proposes that the link layer feedback could be used as the link monitoring mechanism of DYMO protocol, and simulation results show that the link layer feedback could help DYMO protocol largely reduce the delay of sensing broken link under small traffic scenario, inform the nodes using this broken link in the network that the relative route could not be used any more, thus lowering the amount of packet-drop due to the node using a failed route.

关 键 词：链路层反馈 断路感知时延 动态无线自组织网络按需路由协议 

分 类 号：TN929[电子电信—通信与信息系统]