计算机工程与应用 ›› 2009, Vol. 45 ›› Issue (5): 120-124.DOI: 10.3778/j.issn.1002-8331.2009.05.035

• 网络、通信、安全 • 上一篇    下一篇

TA-chord2:基于分层DHT的拓扑感知流媒体体系

肖黎黎,覃少华,吴明生,吴 绮,孙桂刚   

  1. 广西师范大学 计算机科学与信息工程学院,广西 桂林 541004
  • 收稿日期:2008-01-14 修回日期:2008-03-31 出版日期:2009-02-11 发布日期:2009-02-11
  • 通讯作者: 肖黎黎

TA-chord2:A topo-aware streaming media architecture based on two-layer DHT

XIAO Li-li,QIN Shao-hua,WU Ming-sheng,WU Qi,SUN Gui-gang

  

  1. Department of Computer Science and Information Technology,Guangxi Normal University,Guilin,Guangxi 541004 China
  • Received:2008-01-14 Revised:2008-03-31 Online:2009-02-11 Published:2009-02-11
  • Contact: XIAO Li-li

摘要: 针对目前DHT系统较高的维护开销、应用层网络与物理网络的拓扑失配等不足,提出一种基于分层DHT的拓扑感知流媒体体系TA-chord2。分层的设计使节点根据其服务能力对系统做出相应的贡献;PNS原则和Vivaldi坐标减少了节点的查询延迟和媒体数据的传播延迟;多个邻近的供应者同时给一个请求者提供流服务,提高了流媒体系统的传输效率和服务质量。实验仿真结果表明该体系有更低的维护开销、更好的路由性能和更高的服务效率。

关键词: TA-chord2, chord, 邻近邻居选择(PNS), Vivaldi, 拓扑感知

Abstract: In DHT system,the maintenance overhead is relatively high and topo is not aware.To solve these problems,this paper introduces TA-chord2:A topo-aware streaming media architecture based on two-layer DHT,which makes nodes to contribute their resources differently to the system based on their service capacity;PNS and Vivaldi are introduced to decrease routing latency and streaming media transmitting lantency;replying queries with multiple peers which are close to the requesting peer,could achieve good streaming quality.Experiment results show that TA-chord2 has lower maintence overhead,better routing performance and streaming quality than chord.

Key words: TA-chord2, chord, Proximity Neighbor Selection(PNS), Vivaldi, topo-aware