naa a22 4500 510797121 CHVBK 20180411083340.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11277-013-1245-2 doi (NATIONALLICENCE)springer-10.1007/s11277-013-1245-2 Farraj Abdallah Department of Electrical and Computer Engineering, University of Toronto, Toronto, ON, Canada aut Queue Model Analysis for Spectrum-Sharing Cognitive Systems Under Outage Probability Constraint [Elektronische Daten] [Abdallah Farraj] This article investigates the behavior of the cognitive queueing system in a spectrum-sharing environment under the primary outage probability constraint. The queueing model is investigated under two cognitive transmit modes. A variable transmit rate that is equal to the cognitive channel's capacity is first revisited, then the case of constant transmit rate is considered. Both transmit modes are found to lead to an $$M/G/1$$ M / G / 1 queueing model. The performance measures of the cognitive queue under these two modes are investigated and numerically compared. The performance measures include the mean transmit rate, mean service time, server utilization, mean waiting and transit times of the packets in the queue, mean number of waiting and transit packets in the queue, mean duration of the server's busy period, and mean number of packets served during the server's busy period. The effects of changing the primary outage probability constraint and the primary transmit rate on the performance measures are investigated as well. Springer Science+Business Media New York, 2013 Channel capacity nationallicence Cognitive communications nationallicence Cross-layer design nationallicence M/G/1 queue nationallicence Outage probability nationallicence Queue performance measures nationallicence Spectrum sharing nationallicence Wireless Personal Communications Springer US; http://www.springer-ny.com 73/3(2013-12-01), 1021-1035 0929-6212 73:3<1021 2013 73 11277 https://doi.org/10.1007/s11277-013-1245-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-013-1245-2 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Farraj Abdallah Department of Electrical and Computer Engineering, University of Toronto, Toronto, ON, Canada aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 73/3(2013-12-01), 1021-1035 0929-6212 73:3<1021 2013 73 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer