一种基于LET预测和转发组成员数的优化组播路由协议  

An optimal multicast protocol based on LET prediction and FGs in mobile Ad hoc networks

作　　者：邓霞[1,2] 王建新[1] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083 [2]广州大学计算机科学与教育软件学院,广东广州510006

出　　处：《电路与系统学报》2009年第6期35-41,共7页Journal of Circuits and Systems

基　　金：高等学校博士学科点专项科研基金(20060533057);湖南省杰出青年基金(06JJ10009);国家自然科学基金(60673164);国家973前期研究专项(2008CB317107);新世纪优秀人才支持计划(NECT-05-0683)

摘　　要：本文从综合考虑ODMRP协议转发组的有效性和健壮性出发,提出了一种基于LET(Link Expiration Time)预测和转发组成员数的组播路由协议LETFG-ODMRP(Optimal Multicast Protocol with LET and FGs based on ODMRP)。LETFG-ODMRP通过对网络中传输路径保持连接时间LET的预测,得知路径的稳定度,然后结合考虑转发组成员数,建立一种新的路由选择标准PathMetric。采用此种路由选择标准,LETFG-ODMRP可调节权重在候选路由集中选择稳定或有效的传输路径构成转发组。模拟仿真结果证实LETFG-ODMRP提高了组播协议健壮性、有效性及自适应能力。In order to enhance both the data efficiency and robustness of ODMRP protocol, an optimal multicast routing protocol called LETFG-ODMRP is proposed, which combines LET （Link Expiration Time） prediction with FGs （Forwarding Group number） based on ODMRP. LETFG-ODMRP acquires the path stability by the prediction of LET. Then it proposes a novel routing metric called PathMetric, which considers both the path stability and the number of FG nodes. During the setup of Forwarding Group, LETFG-ODMRP can choose stable or efficient paths self-adaptively by adjusting different weights in PathMetric. Simulations results show that LETFG-ODMRP can enhance the robustness, efficiency and self-adaptation of multicast routing protocol.

关 键 词：移动自组网 组播 转发组 LET预测 转发组成员数 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]