Wireless Communications
Queueing Networks and Markov Chains
Queueing Networks and Markov Chains
Fundamentals of wireless communication
Fundamentals of wireless communication
Optimal power allocation for cognitive radio under primary users outage loss constraint
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Performance analysis of uplink cognitive cellular networks with opportunistic scheduling
IEEE Communications Letters
Impact of Cognitive Communications on the Performance of the Primary Users
Wireless Personal Communications: An International Journal
Queue Model Analysis for Spectrum-Sharing Cognitive Systems Under Outage Probability Constraint
Wireless Personal Communications: An International Journal
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This article investigates the queueing system of the primary user (PU) in a spectrum-sharing cognitive environment when the cognitive transmission satisfies the PU's outage probability constraint. The primary queueing model is investigated under a cooperative cognitive scheme as well. The performance measures are compared to those in a Rayleigh channel. Because of the random channel outages, an $$M/G/1$$M/G/1 model is found appropriate to describe the PU's queueing system even though the PU transmits its data at a constant rate. The queueing performance measures are investigated; these measures include mean service time, server utilization, mean waiting and transit times, and mean number of waiting and transit packets. Numerical results are provided to illustrate the PU's queue measures under Rayleigh, cognitive, and cooperative cognitive modes.