基于QoS策略的PIM-SM协议的扩充  

QoS Policy-based extension for PIM-SM protocol

作　　者：李钟辉[1] 

机构地区：[1]清华大学信息网络工程研究中心,北京100084

出　　处：《计算机工程与设计》2009年第5期1084-1088,共5页Computer Engineering and Design

摘　　要：为了解决目前对组播服务质量(QoS)支持所存在的不足,提出了基于QoS策略的PIM-SM组播路由协议扩充方案——基于逐跳单播的QoS组播(PUQM)。该方案以PIM-SM组播路由协议为基础,利用下层单播路由协议以逐跳的形式传递和处理组播路由中的预留带宽QoS参数,从而建立基于源的具有QoS保证的组播分发树,确保组播数据包转发过程中对服务质量的要求。对测试数据的分析结果表明,该方案能够达到预期的效果。PUQM （per-hop unicast QoS multicast） arithmetic is proposed to solve the inefficient support for multicast QoS at present. As an extension of PIM-SM, PUQM can transmit and process bandwidth reservation requests in a per-hop manner during multicast routing based on lower-layer unicast routing protocol, by which a source-specific tree with QoS guarantee can be constructed so as to fulfill the quality of service during multicast packet forwarding. Experimental results demonstrate that the proposed scheme can achieve the purpose as expected.

关 键 词：服务质量 组播 路由 协议无关组播稀疏模式 PUQM 

分 类 号：TP393.02[自动化与计算机技术—计算机应用技术]