BowCast:A P2P Multicast Routing Protocol for Asymmetric Link Delay Networks
Linfeng Liu · Journal of Nanjing University of Posts and Telecommunications · 2009
Though the performance advantages of IP multicast is undeniable,the deployment of IP multicast has met many difficulties.In recent years,P2P multicast is being increasingly recognized as a viable alternative.In this paper,the routing problem of P2P multicast in asymmetric link delay networks is studied,and a new P2P multicast protocol called BowCast is proposed.Adopting tree-based and distributed strategies,the protocol enables members of a multicast group to self-organize into a sourced-based P2P multicast tree with minimum delay.The BowCast uses a technology called Bounded One-Way probe(BOW)to implement the routing optimum algorithms.BOW can provide the relative one-way delay among end systems without requiring global time synchronization.The simulation results show that BowCast can adapt the asymmetric link delay environment very well,and by tuning the scope of probing in BOW,BowCast can make trade-off between routing performance and control overhead flexibly.