Performance Evaluation of Cognitive Radio VoIP Users in Fading Environment

In this paper we investigate three channel allocation algorithms for multi-channel cognitive radio networks: SNR-based allocation (SA), queue-based allocation (QA), and queue-based SNR-aware allocation (QSA). The efficiency of the proposed algorithms is investigated for VoIP cognitive radio users (C...

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Bibliographic Details
Published in:Wireless personal communications 2017-12, Vol.97 (3), p.3951-3977
Main Authors: Bayat, Ali, Mahdavi, Mehdi, Aïssa, Sonia
Format: Article
Language:English
Subjects:
Algorithms
Cognitive radio
Communications Engineering
Computer Communication Networks
Engineering
Networks
Performance evaluation
Provisioning
Quality assurance
Queues
Queuing theory
Resource allocation
Signal,Image and Speech Processing
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Summary:In this paper we investigate three channel allocation algorithms for multi-channel cognitive radio networks: SNR-based allocation (SA), queue-based allocation (QA), and queue-based SNR-aware allocation (QSA). The efficiency of the proposed algorithms is investigated for VoIP cognitive radio users (CRs). The resource allocation in the SA and QA schemes is performed based on the channel quality status seen by each CR and its queue length, respectively. The channel allocation in the QSA scheme is based on both the queue length and the SNR status. The mean packet loss rate (PLR) as the main quality-of-service (QoS) parameter is scrutinized for each algorithm. Novel analytical structures together with new analyses are developed, by which the level of provisioning QoS of VoIP traffic in each of the proposed algorithms can be evaluated. Numerical results and comparisons are also presented. In particular, the QSA algorithm is shown to present the best QoS level and yield the least PLR among the three allocation schemes.
ISSN:0929-6212
1572-834X
DOI:10.1007/s11277-017-4709-y