本文介绍了一种基于封装与聚合的DiffServ多播方案EADSMCast，它通过将核心路由器的转发信息封装到每个多播包头，实现路由器的无状态和可扩展性。改进的组树匹配算法允许相似结构的多播组共享树结构，从而减少边缘路由器的路由表大小。EADSMCast被证实是支持多样化QoS需求的高效多播解决方案。
摘要：
Proposed in this paper is an encapsulation-and-aggregation-based DiffServ multicast scheme named EADSMCast ( Encapsulated and Aggregated DiffServ Multicast) . Derived from the encapsulation-based DSMCast, EADSMCast encapsulates the forwarding information of all core routers of the aggregated tree into each multicast packet head,thus ensuring the statelessness and scalability of core routers in the service domain. Moreover,by improving the group-tree matching algorithm,several multicast groups with similar forwarding structure may share the same aggregated tree,thus reducing the size of multicast routing table maintained by edge routers. Simulated results indicate that EADSMCast is a scalable scheme for supporting heterogeneous QoS multicast.
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