Title :
Optimal transmission strategy for a secondary user in IEEE 802.11 based networks
Author :
Ruby, R. ; Leung, V.C.M. ; Sydor, J.
Abstract :
TDD/TDMA based secondary network with cognitive capability is considered here. Primary network is WiFi based where the secondary network operates. DCF protocol has been followed by the users of WiFi network. Exact operating mechanism of DCF protocol is complex. Given this complexity, it is difficult for a secondary user to fully exploit the spectrum hole unused by WiFi users. We propose a novel opportunistic channel access scheme for the overlay network. Based on some valid arguments, we have justified the optimal transmission strategy of secondary user. Analytical derivation has been given for both types of user when the later acts over the former. Through numerical results, we have justified that the proposed strategy achieves far better performance affecting the original users´ performance slightly.
Keywords :
cognitive radio; overlay networks; protocols; time division multiple access; time division multiplexing; wireless LAN; DCF protocol; IEEE 802.11 based networks; TDD-TDMA based secondary network; WiFi network; cognitive radio; opportunistic channel access scheme; optimal transmission strategy; overlay network; secondary user; spectrum hole; IEEE Xplore; Portable document format;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2012 IEEE 23rd International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
978-1-4673-2566-0
Electronic_ISBN :
2166-9570
DOI :
10.1109/PIMRC.2012.6362536