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Impacts of Improved Peer Selection on Internet Traffic in BitTorrent Networks

Authors:
Peter Danielis
Jan Skodzik
Dirk Timmermann
Thomas Bahls
Daniel Duchow

Keywords: BitTorrent, Peer-to-Peer, Topology Awareness

Abstract:
Peer-to-Peer (P2P) file sharing generates by far the most Internet traffic reaching up to 70 % in some regions of the world. These data volumes pose a significant challenge to Internet Service Providers (ISPs) regarding traffic engineering. Because P2P routing is usually agnostic of the underlying topology, traffic engineering abilities of ISPs are inhibited and their core networks are overburdened with P2P data. To disburden ISPs’ core networks, we propose a new algorithm for the BitTorrent (BT) protocol in order to improve peer selection. BT users are provided with accurate information on the hop counts to other BT users to select physically proximate users. Thereby, the initial Time-To-Live value (TTL) of outgoing IP packets is copied and inserted as part of the BT payload. At the packet’s destination, the hop count is calculated as the difference between the copied TTL and the TTL of the IP header. We present simulation results for standard and modified BT implementation and discuss impacts on both the load of ISPs’ core networks and BT users’ download performance.

Pages: 8 to 13

Copyright: Copyright (c) IARIA, 2011

Publication date: March 20, 2011

Published in: conference

ISSN: 2308-3980

ISBN: 978-1-61208-125-0

Location: St. Maarten, The Netherlands Antilles

Dates: from March 20, 2011 to March 25, 2011