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MPLS网络中的服务质量组播面临着组播路由状态的可扩展性、服务质量支持困难等瓶颈.针对这些问题,提出一种基于子树共享的新型MPLS服务质量组播方案.本文的贡献有:提出一种组播组到组播分发子树的映射算法,将多个组映射到同一颗子树,以共享的子树为基础构造完整的组播分发树,从而有效地减少MPLS核心网络中的路由状态;将服务质量的考量引入组播分发树的构造过程中,使新的方案能够支持服务质量组播;提出一种简单方便的子树共享实现机制.模拟结果表明,基于子树共享的新型MPLS服务质量组播方案能够有效地减少组播路由状态并提供多种服务质量控制的能力.
Quality of service multicast in MPLS network is faced with the bottleneck of multicast routing state scalability and service quality support difficulties.Aiming at these problems, this paper proposes a new MPLS multicast quality-of-service multicast scheme based on sub-tree sharing.The contribution of this paper : This paper proposes a mapping algorithm from multicast group to multicast distribution subtree, maps multiple groups to the same subtree and constructs a complete multicast distribution tree based on the shared subtree, so as to effectively reduce the number of MPLS core networks In the construction of multicast distribution tree so that the new scheme can support quality of service multicasting.A simple and convenient mechanism for implementing sub-tree sharing is proposed.The simulation results show that based on the sub-tree Shared New MPLS Quality of Service Multicast solutions effectively reduce multicast routing status and provide multiple quality of service control capabilities.