Cognitive radio for flexible mobile multimedia communications
Mobile Networks and Applications - Special issue on Mobile Multimedia Communications (MOMUC '99)
Spectrum sharing through distributed coordination in dynamic spectrum access networks
Wireless Communications & Mobile Computing - Cognitive Radio, Software Defined Radio And Adaptive Wireless Systems
Optimal selection of channel sensing order in cognitive radio
IEEE Transactions on Wireless Communications
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
What and how much to gain by spectrum agility?
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
Video streaming over cognitive radio networks
Proceedings of the 4th Workshop on Mobile Video
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In this paper, quality of service (QoS) provisioning for voice service over cognitive radio networks is considered. As voice traffic is sensitive to delay, the presence of primary users and the requirement that secondary users should not interfere with them pose many challenges for QoS support for secondary voice users. Two cognitive medium access schemes are proposed in this paper for the secondary voice users to access the available channel. An analytical model is developed to obtain the voice service capacity (i.e., the maximum number of voice users that can be supported with QoS guarantee) for the secondary users, taking the impact of primary users' activities into consideration. The analytical model is validated by the simulation. The analytical results will be useful to support voice service in cognitive radio networks.