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International Journal of Digital Multimedia Broadcasting
Volume 2010 (2010), Article ID 470813, 15 pages
http://dx.doi.org/10.1155/2010/470813
Research Article

RTSP-based Mobile Peer-to-Peer Streaming System

1Department of Communications Engineering, Tampere University of Technology, P.O. Box 553, 33101 Tampere, Finland
2Nokia Research Center, P.O. Box 1000, 33721 Tampere, Finland

Received 1 June 2009; Revised 12 November 2009; Accepted 6 January 2010

Academic Editor: John Buford

Copyright © 2010 Jani Peltotalo 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.

Abstract

Peer-to-peer is emerging as a potentially disruptive technology for content distribution in the mobile Internet. In addition to the already well-known peer-to-peer file sharing, real-time peer-to-peer streaming is gaining popularity. This paper presents an effective real-time peer-to-peer streaming system for the mobile environment. The basis for the system is a scalable overlay network which groups peer into clusters according to their proximity using RTT values between peers as a criteria for the cluster selection. The actual media delivery in the system is implemented using the partial RTP stream concept: the original RTP sessions related to a media delivery are split into a number of so-called partial streams according to a predefined set of parameters in such a way that it allows low-complexity reassembly of the original media session in real-time at the receiving end. Partial streams also help in utilizing the upload capacity with finer granularity than just per one original stream. This is beneficial in mobile environments where bandwidth can be scarce.