一种基于虚拟P2SP的应用层混合组播模型

Hybrid application layer multicast model based on virtual P2SP

为了提高应用层组播数据分发的效率,提出了一种基于虚拟P2SP(peertoserver&peer)架构的应用层混合组播模型VPHM。该模型构建了一个四层的数据分发结构,从上至下为服务节点层、超级节点层、虚拟服务层和peer节点层。上三层组成组播域,保证了组播的广度,下两层组成VP2SP(virtualP2SP)域,确保了组播的深度。仿真实验结果表明,该模型具有较低的平均端到端时延和较小的控制开销,适用于高服务质量的大规模应用层组播应用环境。

To improve the application layer muhicast data distribution efficiency, this paper presented one kind of hybrid ap- plication layer multicast model based on the virtual P2SP（ peer to server ＆ peer）VPHM. The model created a four-layer data distribution structure. From top to bottom was the service node layer, super node layer, the virtual service layer, Peer node layer. The multicast domain including the top three layers was employed to ensure the breadth of multieast, while the VP2SP （ virtual P2SP） domain including the lowest two layers was used to ensure the depth of the muhicast. Simulation results show that the model reduces the control overhead and cuts down the average end to end delay, which is suitable to those large scale ALM applications with high quality of seIvice guaranteed.