BitTorrent Locality-Awareness Application with Colorless ONUs in an Enhanced EPON System

Abstract

BitTorrent (BT) file sharing is the most popular peer-to-peer (P2P) application and it accounts for a large proportion of the bandwidth utilized worldwide. However, BT ignores the traffic costs for Internet service providers (ISPs) and a large amount of cross-ISP traffic is generated. Thus, ISPs often throttle BT traffic to control costs. Ethernet passive optical network (EPON) is an important primitive technology for the future-oriented next generation access network which aims to provide a suitable environment for P2P services. In this study, we designed an optical line terminal (OLT) with a tracking-server in order to implement a fully functioning BT system that can handle the local BT traffic. We propose the use of a passive splitter redirection capability (PSR) between the OLT and colorless optical network units (ONUs) to support intra-traffic redirection communication in order to achieve traffic localization among ONUs in the enhanced EPON. Our simulation results showed that the proposed architecture can improve the quality of service (QoS) in terms of the mean packet delay, system throughput, and packet loss.