带分流反馈的AOMDV路由协议的改进  

Improvements of AOMDV routing protocol with divider and feedback

作　　者：黄廷辉[1] 陆向远[1] 崔更申[1] 杨旻[1] 

机构地区：[1]桂林电子科技大学计算机科学与工程学院,桂林541004

出　　处：《计算机应用研究》2013年第8期2473-2475,共3页Application Research of Computers

基　　金：国家自然科学基金资助项目(61063040);广西可信软件重点实验室(桂林电子科技大学)开放课题资助项目

摘　　要：针对AOMDV协议最短路径的路由选择策略没有考虑网络负载情况而容易造成局部堵塞,以及缺乏对备用路径的有效维护,导致使用无效的备用路径增加丢包率、降低路由效率的问题,提出了带分流反馈的AOM-DV协议。提出的协议综合考虑跳数、路径使用频率、路径状态等因素设计分流规则,使数据分组在多条路径中并行传输来均衡负载;利用网络局部信号强度动态设置接收信号强度阈值,通过对比报文接收信号强度和动态阈值来标志危险路径,并将危险路径逐级反馈至上游节点,从而同时维护了多条路径。NS2的仿真结果表明,提出的协议和AOMDV相比,提高了分组投递率,降低了时延和路由开销。AOMDV protocol＇s routing strategy of selecting shortest path does not consider the network load. This may lead to partial blockage. Besides, AOMDV has no effective maintenance of the alternate path and using invalid alternate path results in packet loss and routing inefficiency. To address these problems, this paper improved the AOMDV protocol by adding divider and feedback mechanism. The improved protocol designed a diversion rule, which considered hop count, path＇s used time and path state to make data packets transmit in multiple paths at the same time. Secondly, it set the received signal strength thresh- old dynamically based on the signal strength of local network. The protocol marked a dangerous path by comparing the receive signal strength to the threshold and feeded it back to the upstream node. In this way, multiple paths were maintained at the same time. NS2 simulation results show that, compared with AOMDV, the improved protocol increases packet delivery rate, re- duces the end-to-end delay and routing overhead.

关 键 词：ADHOC网络 负载均衡 反馈机制 多路径维护 信号强度 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]