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Providing QoS to Secondary Users Employing VoIP Applications in Cognitive Radio Networks

Authors:
Esra Hatice Demirtaş
Sema F. Oktuğ

Keywords: Cognitive Radio; QoS; VoIP

Abstract:
Quality of Service in Cognitive Radio is an open area for researches. Previous works on this item are classified as either Quality of Service of Primary User or Quality of Service of Secondary User. The work described in this paper is related to the latter. We worked on a popular application which is Voice over IP. The aim is to provide a sufficient Quality of Service to Secondary Users employing Voice over IP. For that purpose; calls over a real Application Server with different codecs, and different voice packet size were established; voice packets were collected through a network protocol analyzer, which is wireshark; packets were analyzed; and an application layer algorithm has been proposed. Then, a Secondary User with a Voice over IP connection employing the proposed algorithm was simulated considering various arrival patterns of Primary User using the network simulator, ns-2. The results obtained confirmed the success of the proposed technique. It is shown that, the cognitive radio applications employing the introduced technique achieve an acceptable Quality of Service level for Voice over IP connections. To the best of our knowledge, this is the first work providing Quality of Service to Secondary Users of Cognitive Radio Networks at application layer.

Pages: 83 to 87

Copyright: Copyright (c) IARIA, 2011

Publication date: October 23, 2011

Published in: conference

ISSN: 2163-9027

ISBN: 978-1-61208-166-3

Location: Barcelona, Spain

Dates: from October 23, 2011 to October 29, 2011