基于服务质量约束的距离矢量组播路由协议研究

Study of the Distance Vector Mulicast ProtocolBased on QoS-constrained

提出一种全新的QoS约束距离矢量组播路由协议,使路由器只存储其直接邻居节点的可达性信息以及链路的QoS状态信息,减少路由器存储开销,提高协议的规模伸缩性.结合QoS影响因素提出一种综合性启发式函数,有效使组播树的时延、带宽和网络代价得到一定程度的优化.通过模拟分析表明,该协议具有节点存储开销小、呼叫成功率高等优点.

This paper proposes a novel QoS-constrained multicast routing protocol aiming at alleviating the memory overhead of the routers for setting up multicast trees and improving sealability of the protocol. Every node needs to maintain a forwarding table which contains information about its immediate neighbors, A very efficient integrated heuristic function which can be used to optimize multicast delay, bandwidth and network cost to some extent was proposed in this paper. It showed the effectiveness of this multicast protocol by evaluating the protocol＇ s performance in terms of average control message and average call acceptance ratio through simulation.