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International Journal of Digital Multimedia Broadcasting
Volume 2017, Article ID 2456814, 9 pages
Research Article

A Novel Approach to Reduce the Unicast Bandwidth of an IPTV System in a High-Speed Access Network

LESSI Laboratory, Department of Physics, Faculty of Sciences Dhar El Mahraz, Sidi Mohammed Ben Abdellah University, Fez, Morocco

Correspondence should be addressed to El Hassane Khabbiza;

Received 29 June 2017; Revised 17 September 2017; Accepted 26 September 2017; Published 31 October 2017

Academic Editor: Jintao Wang

Copyright © 2017 El Hassane Khabbiza et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Channel change time is a critical quality of experience (QOE) metric for IP-based video delivery systems such as Internet Protocol Television (IPTV). An interesting channel change acceleration scheme based on peer-assisted delivery was recently proposed, which consists of deploying one FCC server (Fast Channel Change Server) in the IP backbone in order to send the unicast stream to the STB (Set-Top Box) before sending the normal multicast stream after each channel change. However, deploying such a solution will cause high bandwidth usage in the network because of the huge unicast traffic sent by the FCC server to the STBs. In this paper, we propose a new solution to reduce the bandwidth occupancy of the unicast traffic, by deploying the FCC server capabilities on the user STB. This means that, after each channel change request, the STB will receive the unicast traffic from another STB instead of the central server. By using this method, the unicast traffic will not pass through the IP network; it will be a peer-to-peer communication via the Access Network only. Extensive simulation results are presented to demonstrate the robustness of our new solution.