一种支持多QoS约束的多播路由协议  

Multicast Routing Protocol with Multiple QoS Constraints

作　　者：许毅[1] 李腊元[1] 

机构地区：[1]武汉理工大学现代教育技术中心,计算机科学与技术学院武汉430063

出　　处：《小型微型计算机系统》2005年第12期2065-2068,共4页Journal of Chinese Computer Systems

基　　金：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(2000J154)资助

摘　　要：在分析YAM、QoSMIC和QMRP协议的基础上,讨论了包括延时、延时抖动、带宽和代价约束的多播路由问题,描述了一种适用于多QoS约束的多播路由的网络优化模型,提出了一种支持多QoS约束的多播路由协议(MRPMQoS),构建在NS2下该协议的仿真模块.该协议只要求网络链路(或节点)的局部状态信息,不需要维护全局状态信息,多播组成员可动态地加入/退出多播会晤.该协议采用单路径寻径和多路径寻径相结合的搜索方式,有效地减少构造一棵多播树的开销,降低结点加入延时和提高寻径成功率.NS2仿真结果证明,该协议的可用性和有效性,可用于不同规模网络,具有良好的可扩展性.The analysis of the protocols on YAM, QoSMIC and QMRP, this paper discusses the multicast routing problem with delay, delay jitter, bandwidth and cost metrics, and describes a network optimization model for researching the routing problem with multiple QoS constraints. It presents a multicast routing protocol with multiple QoS constraints （MRPMQoS） and constructs the simulation model of MRPMQoS based on NS2. The MRPMQoS only requires the local state information of the link （or node）, but does not require any global network sate to be maintained. In MRPMQoS, a multicast group member can join or leave the multicast session dynamically. The MRPMQoS can effectively decrease the overhead for constructing a multicast tree and the delay of the nodes＇join, and improve the success ratio of seeking links. Simulation results show that the MRP- MQoS provides an available means to implement multicast routing, and adapt to all kinds of the topology networks, and have better expansibility.

关 键 词：多播路由 多QOS约束 MRPMQoS 网络 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]