Table of Contents Author Guidelines Submit a Manuscript
Journal of Computer Networks and Communications
Volume 2012, Article ID 485875, 10 pages
http://dx.doi.org/10.1155/2012/485875
Research Article

Real-Time Communications in Autonomic Networks: System Implementation and Performance Evaluation

1Wireless Telecommunications Laboratory, University of Patras, TK 26504, Patras, Greece
2Department of Telecommunications Systems and Networks, TEI of Messolonghi, TK 30300, Nafpaktos, Greece

Received 25 May 2012; Accepted 29 June 2012

Academic Editor: Peter Brida

Copyright © 2012 C. Tselios 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

This paper describes the design and prototype implementation of a communication platform aiming to provide voice and video communication in a distributed networking environment. Performance considerations and network characteristics have also been taken into account in order to provide the set of properties dictated by the sensitive nature and the real-time characteristics of the targeted application scenarios. The proposed system has been evaluated both by experimental means as well as subjective tests taken by an extensive number of users. The results show that the proposed platform operates seamlessly in two hops, while in the four hops scenario, audio and video are delivered with marginal distortion. The conducted survey indicates that the user experience in terms of Quality of Service has obtained higher scores in the scenario with the two hops.