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Journal of Computer Networks and Communications
Volume 2014, Article ID 945695, 10 pages
Research Article

A New QoS Management Scheme for VoIP Application over Wireless Ad Hoc Networks

1Department of Computer Science, Abdelmalek Essaadi University, 90100 Tangier, Morocco
2Department of Engineering Technology, Houston University, Houston, TX 77004, USA

Received 13 May 2014; Revised 3 September 2014; Accepted 18 September 2014; Published 7 October 2014

Academic Editor: Homero Toral-Cruz

Copyright © 2014 Said El brak 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.


Nowadays, mobile ad hoc networks (MANETs) have to support new applications including VoIP (voice over IP) that impose stringent QoS (quality of service) constraints and requirements. However, VoIP applications make a very inefficient use of the MANET resources. Our work represents a first step toward improving aspects at the network layer by addressing issues from the standpoint of adaptation, claiming that effective adaptation of routing parameters can enhance VoIP quality. The most important contribution is the adaptive OLSR-VA algorithm which provides an integrated environment where VoIP activity is constantly detected and routing parameters are adapted in order to meet the application requirements. To investigate the performance advantage achieved by such algorithm, a number of realistic simulations (MANET scenarios) are performed under different conditions. The most important observation is that performance is satisfactory in terms of the perceived voice quality.