Resolving Peer-to-Peer Connection Barriersy Selective Scheduling
Date Issued
2009
Date
2009
Author(s)
Chang, Chao-Chueh
Abstract
Recent study indicates that a large portion of peers in a P2P system do not contribute their out-going bandwidth due to the usage of network address translator (NAT) that blocks the incoming traffic. Recent study also shows that many internet service providers (ISPs) simply choose to block P2P connections because they create too much cross-ISP traffic. In this paper, we present a public-first approach to resolve the NAT-related connectivity constraint for P2P content delivery systems. Unlike STUN, which attempts to resolve the NAT traversal problem directly, our approach targets better utilization of available connectivity between peers and achieves this goal by selective content delivery scheduling. Experimental results show that it improves the P2P file transmission time by 20%. To reduce the cross-ISP traffic of P2P systems, we propose a light-weight, distributed method to identify peers of the same ISP. The proposed method reduces cross-ISP traffic without affecting the P2P system performance.
Subjects
Peer-to-peer network system
multimedia streaming
content delivery
ISP-friendly mechanism
Type
thesis
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