一种基于P2P网络的层次化覆盖多播模型  

A P2P NETWORK-BASED HIERARCHICAL OVERLAY MULTICAST MODEL

作　　者：陈良彬[1] 李强[1] 

机构地区：[1]空军第一航空学院基础部,河南信阳464000

出　　处：《计算机应用与软件》2011年第4期254-257,共4页Computer Applications and Software

摘　　要：P2P网络的应用日益广泛,但是针对网络中各个终端主机网络接口带宽各异的实际情况,目前的覆盖多播模型没有综合考虑节点的延迟和实际可用带宽的限制。针对上述问题,提出了一种基于P2P网络的层次化覆盖多播模型(HOMM),该模型综合考虑了延迟和带宽两种因素,采用优先度作为构建ALM树的标准,在簇内构建局部ALM树,同时节点的加入、失效等操作的影响只局限于较小的局部范围内,使整个P2P网络的数据转发负载更为均衡。仿真实验表明该模型具有高效性、健壮性,能够很好地适应终端主机网络接口带宽各异的大规模组播环境。P2P network is widely used.In dealing with the fact that different end hosts in real network have different network interface bandwidth,present overlay multicast models haven＇t taken bandwidth and latency into consideration very well.In this paper,a hierarchical overlay multicast model based on P2P network（HOMM） is proposed;it takes both the latency and available bandwidth of peers into consideration,introducing the concept of priority as the standard to build ALM tree,and it adopts the idea of building local ALM tree in the cluster.At the same time influence of these operations such as peer arrivals and departures is limited in small local range,which makes whole data forwarding load of P2P network more balance.The result of simulation demonstrates that this model is efficient and robust,it can well adapt to the large scale multicast environment with various network interface bandwidth of end host.

关 键 词：P2P网络 覆盖多播 平均延迟 优先度 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]