一种基于直接探测的覆盖网Anycast服务模型(英文)

AN OVERLAY ANYCAST SERVICE MODEL BASED ON DIRECT PROGING

针对目前的覆盖网anycast服务模型无法在解决可扩展问题的同时实现快速高效的最近组成员查找,提出了一种基于端到端直接探测的覆盖网Anycast服务模型POA.POA为每个节点维护一个具有k个成员的邻居环,当用户请求到达时,POA以用户为中心根据邻居环信息逐步逼近探测组成员.与目前最好的模型Meridian相比,查询时间从5t2log(R)缩短为3t2log(R),同时加快了邻居环选择算法的收敛速度.理论分析和基于OPNET的仿真实验证明了该模型有效地的达到了设计目标.

Since the existed overlay anycast service model can not achieve scalability and reduce query latency simultaneously.An end-to-end direct probing based overlay anycast service model,POA,is proposed.POA maintained a neighbor ring,which including k members,for each nod.When anycast request arrived,POA probed the best server according to neighbor information.POA′s probing was client-oriented and iterative,compared with Meridian,it can cut down the query latency from 5t2log（R） to 3t2log（R）,and accelerate the constringency of neighbor selection.Analyze and simulation which was based on OPNET platform,illustrated the related performance of POA.