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Saturation throughput analysis of a cognitive IEEE 802.11-based WLAN overlaid on an IEEE 802.16e WiMAX
, Article IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, 9 September 2012 through 12 September 2012 ; September , 2012 , Pages 1515-1520 ; 9781467325691 (ISBN) ; Moradian, M ; Ashtiani, F ; Sharif University of Technology
2012
Abstract
In this paper, we focus on a cognitive network scenario, comprised of a WLAN overlaid on a network with time-scheduled primary users. WiMAX is an example of such primary networks. For time-scheduled primary users simple On-Off traffic model with exponential durations is not valid anymore. In this scenario, the cognitive nodes (CNs) hear downlink map (DL-MAP) and thus, know the frequency and time locations of all allocated slots at each frame. Then, cognitive nodes contend with each other in order to transmit their fixed size packets based on IEEE 802.11 MAC protocol. Since the number of empty slots at each frame is variable each packet transmission in cognitive network prolongs a random...