DocumentCode :
2203926
Title :
Peer Selection Strategies for Improved QoS in Heterogeneous BitTorrent-Like VoD Systems
Author :
D´Acunto, Lucia ; Andrade, Nazareno ; Pouwelse, Johan ; Sips, Henk
Author_Institution :
Delft Univ. of Technol., Delft, Netherlands
fYear :
2010
fDate :
13-15 Dec. 2010
Firstpage :
89
Lastpage :
96
Abstract :
The efficiency of Bit Torrent in disseminating content has inspired a number of P2P protocols for on-demand video streaming (VoD). Prior work on adapting Bit Torrent to VoD mainly focused on the piece selection policy, since streaming requires a somewhat "in order" download progress. Conversely, not much effort has been spent into adapting Bit Torrent\´s peer selection policy, where nodes mainly serve those that have recently uploaded to them at the highest rates. This mechanism incentivizes cooperation among peers but, in a heterogeneous system (i.e. where peers have different bandwidth capacities), it causes faster peers to receive higher download speeds than slower peers. This might hurt the system\´s ability of providing as many nodes as possible with the minimum download speed necessary to sustain the video playback rate. Furthermore, peers gain little utility in downloading at rates much higher than the video playback rate. Inspired by these observations, in this work, we extend the peer selection mechanism of an existing Bit Torrent-like VoD protocol, give-to-get (G2G), with techniques that allow peers to relax their reciprocity-based peer selection and choose more random nodes when their current QoS is high. In this way, more peers can be granted a good QoS and free-riding is tolerated only when bandwidth resources are abundant. To demonstrate the benefits of our approach, we present extensive simulations of the introduced techniques.
Keywords :
peer-to-peer computing; protocols; quality of service; video on demand; video streaming; P2P protocols; QoS; bandwidth resources; beterogeneous BitTorrent-like VoD systems; downloading rates; give-to-get video protocol; on-demand video streaming; peer selection; random nodes; video playback rate; peer-to-peer; quality-of-service; video-on-demand;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Multimedia (ISM), 2010 IEEE International Symposium on
Conference_Location :
Taichung
Print_ISBN :
978-1-4244-8672-4
Electronic_ISBN :
978-0-7695-4217-1
Type :
conf
DOI :
10.1109/ISM.2010.22
Filename :
5693827
Link To Document :
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