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QoS动态多播路由协议
引用本文:孙宝林,李腊元.QoS动态多播路由协议[J].小型微型计算机系统,2005,26(11):1877-1880.
作者姓名:孙宝林  李腊元
作者单位:1. 武汉科技学院,数理系,湖北,武汉,430073;武汉理工大学,计算机科学与技术学院,湖北,武汉,430063
2. 武汉理工大学,计算机科学与技术学院,湖北,武汉,430063
基金项目:国家自然科学基金项目(60172035,90304018)资助;湖北省自然科学基金项目(2004ABA014.2005ABA231)资助.
摘    要:保证服务质量的QoS(Quality of Service)路由是网络中解决OoS问题的一项关键技术.具有OoS约束的多播路由技术已成为网络领域的一个重要研究课题.该文研讨了具有QoS约束的动态多播路由问题.文中描述了一种适应于QoS多播路由的网络模型,提出了一种QoS动态多播路由协议(QDMRP).QDMRP只要求网络链路(或节点)的局部状态信息,不需要维护全局状态信息.QDMRP较好地减少构造一棵多播树的开销.仿真实验结果表明:QDMRP具有较低的控制信息开销和节点加入时延,较好地适合于网络状态变化比较频繁的环境以及实时多媒体应用.

关 键 词:多播路由  协议  QoS路由  动态多播路由
文章编号:1000-1220(2005)11-1877-04
收稿时间:2004-06-02
修稿时间:2004-06-02

QoS-Aware Dynamic Multicast Routing Protocol
SUN Bao-lin,LI La-yuan.QoS-Aware Dynamic Multicast Routing Protocol[J].Mini-micro Systems,2005,26(11):1877-1880.
Authors:SUN Bao-lin  LI La-yuan
Affiliation:Department of Mathematics and Physics, Wuhan University of Science and Engineering,Wuhan 430073, China;2.School of Computer Science and Technology, Wuhan University of Technology,Wuhan 430063, China
Abstract:QoS Routing is one of the key technologies to provide quality of service in future networks.QoS multicast routing in networks with uncertain parameters has become a very important research issue in the areas of networks.This paper discusses the multicast routing problem with multiple QoS constraints,and describes a network model that is suitable to research such routing problem.It presents a QoS-aware dynamic multicast routing protocol(QDMRP).The QDMRP attempts to significantly reduce the overhead of constructing a multicast tree with QoS constraints.In QDMRP,a multicast group member can join or leave a multicast session dynamically,which should not disrupt the multicast tree.It also attempts to minimize overall cost of the tree,and satisfies the QoS constraints and the requirements of least cost.Simulations show that QDMRP is better than other protocols and is fitter for the network situations with the status changed frequently and the real-time multimedia applications.Control overhead and access latency can also be reduced greatly.
Keywords:multicast routing  protocol  QoS routing  dynamic multicast routing
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