tailieunhanh - Báo cáo hóa học: " Research Article Bandwidth Impacts of Localizing Peer-to-Peer IP Video Traffic in Access and Aggregation Networks"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Bandwidth Impacts of Localizing Peer-to-Peer IP Video Traffic in Access and Aggregation Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 491860 7 pages doi 2008 491860 Research Article Bandwidth Impacts of Localizing Peer-to-Peer IP Video Traffic in Access and Aggregation Networks Kenneth Kerpez Telcordia Technologies Applied Research One Telcordia Drive Piscataway NJ 08854-4151 USA Correspondence should be addressed to Kenneth Kerpez kkerpez@ Received 22 October 2007 Revised 12 May 2008 Accepted 12 September 2008 Recommended by Weihua Zhuang This paper examines the burgeoning impact of peer-to-peer P2P traffic IP video traffic. High-quality IPTV or Internet TV has high-bandwidth requirements and P2P IP video could severely strain broadband networks. A model for the popularity of video titles is given showing that some titles are very popular and will often be available locally making localized P2P attractive for video titles. The bandwidth impacts of localizing P2P video to try and keep traffic within a broadband access network area or within a broadband access aggregation network area are examined. Results indicate that such highly localized P2P video can greatly lower core bandwidth usage. Copyright 2008 Kenneth Kerpez. 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. 1. INTRODUCTION Localized P2P ensures that files are preferably delivered from nearby subscribers in order to limit backbone bandwidth. Many new IPTV rollouts envision deploying a personal video recorder PVR at each subscriber s location. These PVRs could potentially be used to offload traffic from network video servers by allowing the PVRs to serve titles via P2P. In this way localized P2P could be implemented by network and service providers. Copyright protection as well as a number of management challenges would need to be addressed to make