NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
VoIP support using group resource allocation based on the UMB system
IEEE Communications Magazine
Mobile WiMAX systems: performance and evolution
IEEE Communications Magazine
An analysis of VoIP service using 1×EV-DO revision a system
IEEE Journal on Selected Areas in Communications
Decentralized cognitive MAC for opportunistic spectrum access in ad hoc networks: A POMDP framework
IEEE Journal on Selected Areas in Communications
Performance analysis of an unslotted CSMA in the multi-channel cognitive radio networks
Proceedings of the 5th International Conference on Queueing Theory and Network Applications
Proceedings of the 6th International Conference on Queueing Theory and Network Applications
Design and study of VoIP model in cognitive radio network under different simulation platforms
Proceedings of the CUBE International Information Technology Conference
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In this letter, we analyze a voice over IP (VoIP) capacity in a cognitive radio system. We formulate the system as a two-dimensional discrete time Markov chain (DTMC). The VoIP traffic and wireless channel in the cognitive radio system are described as a Markov modulated Poisson process (MMPP) model and a Markov channel model, respectively. We demonstrate various numerical and simulation results, such as packet dropping probability and VoIP capacity.