Channel Allocation for Fairness in Opportunistic Spectrum Access Networks

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Ahmed, Waqas, Gao, Jason and Faulkner, Michael (2010) Channel Allocation for Fairness in Opportunistic Spectrum Access Networks. In: 2010 IEEE wireless communications and networking conference (WCNC 2010) : proceedings : Sydney, Australia, 18-21 April, 2010. IEEE, Piscataway, N.J..


In this paper, we investigate the fairness between two secondary user (SU) groups in an opportunistic spectrum access networks (OSA). First, for a given number of allocated channels the throughput of each SU group is analyzed in terms of its forced termination and blocking probabilities using continuous time Markov model. Based on these calculations, the fairness between two SU groups is discussed for different traffic conditions. The results show that for given datarate and relatively higher service durations of two SU groups, the OSA network is highly unfair in complete spectrum sharing scenario. The channel allocation achieve fairness at a cost of decrease in aggregate throughput. However, the computation of a channel allocation vector is a complex process as it require the knowledge of the termination and blocking probabilities of both SU groups. To overcome this drawback, we propose a suboptimal approach by approximating the behaviour of these probabilities. Numerical results show that the proposed method follows the optimal closely. Simulation results are also provided to support the findings.

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Item type Book Section
DOI 10.1109/WCNC.2010.5506451
Official URL
ISBN 9781424463961
Subjects Historical > Faculty/School/Research Centre/Department > Centre for Telecommunications and Micro-Electronics (CTME)
Historical > FOR Classification > 1005 Communications Technologies
Historical > SEO Classification > 8901 Communication Networks and Services
Keywords ResPubID21286, cognitive radio, blocking probability, forced termination probability
Citations in Scopus 5 - View on Scopus
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