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

doi:10.3778/j.issn.1002-8331.2009.05.035

Computer Engineering and Applications ›› 2009, Vol. 45 ›› Issue (5): 120-124.DOI: 10.3778/j.issn.1002-8331.2009.05.035

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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

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

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

广西师范大学计算机科学与信息工程学院，广西桂林 541004

通讯作者: 肖黎黎

Abstract

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

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

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

. TA-chord2：A topo-aware streaming media architecture based on two-layer DHT[J]. Computer Engineering and Applications, 2009, 45(5): 120-124.

肖黎黎,覃少华,吴明生,吴绮,孙桂刚. TA-chord2：基于分层DHT的拓扑感知流媒体体系[J]. 计算机工程与应用, 2009, 45(5): 120-124.

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

TA-chord2：基于分层DHT的拓扑感知流媒体体系

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