一种无线mesh网络下P2P-VoD系统的资源查询算法  

An Algorithm of Resource Search of P2P-VoD System in Wireless Mesh Networks

作　　者：姜慧霖[1] 

机构地区：[1]商丘师范学院计算机与信息技术学院,河南商丘476000

出　　处：《计算机与现代化》2013年第2期201-205,共5页Computer and Modernization

摘　　要：针对mesh网络下基于Gossip协议的资源查找算法带来的资源查找效率低、消息负载高的问题,本文设计一个mesh网络下P2P-VoD(Peer-to-Peer Video-on-Demand)系统的资源查找算法。将P2P-VoD系统划分为两层结构:利用Chord算法将mesh路由器进行组织作为顶层逻辑结构,负责资源的分配与索引;移动设备为底层结构。根据本文提出的资源查询算法,P2P-VoD系统能够为移动节点快速定位最优服务资源。实验结果表明,该算法能够有效地提高资源查找效率以及降低数据传输时延。Aiming at the problem that the Gossip-based resource search scheme brings the low-efficiency resource search and high message overhead in wireless mesh networks,this paper designs a resource search scheme of P2P-VoD system over the wireless mesh networks.The system is composed of two layers： the mesh routers are grouped as a logical structure in the upper layer by making use of Chord algorithm,which is responsible for the distribution and index of media resource;the mobile devices are considered as the lower layer.In terms of the proposed resource search algorithm,the P2P-VoD system can fast discover the optimal source with needed resource for mobile nodes.Simulation results show that this approach can efficiently improve the efficiency of resource search and reduce the delay of data delivery.

关 键 词：MESH网络 Chord结构 流媒体 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]