一种基于分发树切分的分布式聚集多播协议

随着网络组通讯应用的广泛开展,IP多播将由于路由状态信息爆炸以及控制信息爆炸而面临严重的扩展性问题。在主干网中,这种状态可扩展性问题尤为严重。为了提高主干网中多播状态的可扩展性,本文提出了一种基于数据分发树切分的聚集多播协议——BEAMBTS(Bi-dirEctional Aggregated Multicast Based on Tree Splitting)。BEAMBTS是一种简单而易于实现的、使用双向树的分布式协议。仿真试验显示,BEAMBTS可以更好地改善状态可扩展性。

BEAMBTS: A Distributed Bi-dirEctional Protocol of Aggregated Multicast Based on Tree Splitting

With the enormous group communication applications,IP multicast confronts a severe scalability problem due to state explosion and control explosion.In backbone networks,this state scalability problem is exacerbated,since there are potentially enormous multicast groups crossing backbone domains.To improve the state scalability of multi- cast in backbone domains.This paper proposes a scalable protocol,called BEAMBTS(Bi-dirEctional Aggregated Multi- cast Based-on Tree Splitting),which uses the concept of aggregated multicast based on tree splitting.The analyses and simulations show that BEAMBTS can greatly improve state scalability:the number of aggregated trees is bounded in a small fixed number,and the multicast routing entries in transit nodes can be dramatically decreased.