SDHT： Efficient One-Hop DHT Lookup Framework for P2P Live Streaming  

作　　者：Chen Zhuo Feng Gang Zhou Yang Lu Yi 

机构地区：[1]National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China [2]College of Computing, Georgia Institute of Technology, Atlanta, GA 30332, USA [3]College of Computer Science and Engineering Chongqing University of Technology, Chongqing 400054, P. R. China

出　　处：《China Communications》2012年第8期88-104,共17页中国通信（英文版）

基　　金：Acknowledgements This work was supported by the Key Projects for Science and Technology Development under Caant No. 2009ZX03004-002; the National Natural Science Foundation of China under Gants No. 60833002, No. 60772142; the National Science and Technology Fundamental Project under Grant No. 2008ZX03003-005; the Science ＆ Technology Research Project of Chongqing Education Committee under Crant No. KJ120825.

摘　　要：Video data location plays a key role for Peer-to-Peer （P2P） live streaming applications. In this paper, we propose a new one-hop Distributed Hash Table （DHT） lookup frarrework called Strearre ing-DHT （SDHT） to provide efficient video data location service. By adopting an enhanced events dissemination mechanism-EDRA＋, the accuracy of routing table at peers can be guaranteed. More importantly, in order to enhance the perforlmnce of video data lookup operation without incurring extra overhead, we design a so-called Distributed Index Mapping and Management Mechanism （DIMM） for SDHT. Both analytical modeling and intensive simulation experiments are conducted to demonstrate the effectiveness of SDHT framework. Numerical results show that almost 90% requested video data can be retrieved within one second in SDHT based systems, and SDHT needs only 26% average bandwidth consumption when compared with similar one-hop DHT solutions such as D1HT. This indicates that SDHT framework is an appropriate data lookup solution for time-sensitive network applications such as P2P live streaming.Video data location plays a key role for Peer-to-Peer (P2P) live streaming applications. In this paper, we propose a new one-hop Distributed Hash Table (DHT) lookup framework called Streaming-DHT (SDHT) to provide efficient video data location service. By adopting an enhanced events dissemination mechanism-EDRA+, the accuracy of routing table at peers can be guaranteed. More importantly, in order to enhance the performance of video data lookup operation without incurring extra overhead, we design a so-called Distributed Index Mapping and Management Mechanism (DIMM) for SDHT. Both analytical modeling and intensive simulation experiments are conducted to demonstrate the effectiveness of SDHT framework. Numerical results show that almost 90% requested video data can be retrieved within one second in SDHT based systems, and SDHT needs only 26% average bandwidth consumption when compared with similar one-hop DHT solutions such as D1HT. This indicates that SDHT framework is an appropriate data lookup solution for time-sensitive network applications such as P2P live streaming.

关 键 词：PEER-TO-PEER distributed hash table streaming application live streaming EDRA 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TN943[自动化与计算机技术—计算机科学与技术]