Title :
Waiting Probability Analysis for Dynamic Spectrum Access in Cognitive Radio Networks
Author :
Rawat, Danda B. ; Bista, Bhed Bahadur ; Shetty, Sachin ; Gongjun Yan
Author_Institution :
Dept. of Electr. Eng., Georgia Southern Univ., Statesboro, GA, USA
Abstract :
Cognitive radio networking is emerging paradigm for future generation wireless networks in which cognitive radio users (also known as secondary users) dynamically access the RF spectrum opportunistically without creating harmful interference to primary users. In this paper, the waiting probability of secondary users in the cognitive radio network is analyzed. We consider a cognitive radio network where multiple secondary users (SUs) contend for spectrum access using time division multiple access over idle primary user (PU) channels. Using queue dynamics as Poisson driven stochastic process, we characterize the waiting probability of secondary users. Generally speaking, in practical systems, secondary users of cognitive radio network would have no knowledge of activities of other users, thus the probability of being idle or contention probabilities of SUs´ in cognitive radio network have to be assigned according to the available local information. Our focus is on SUs waiting probability analysis, for which a systematic understanding is lacking. Simulation results show that the use of multiple channels and/or multiple slots leads to significant delay reduction and transmission fairness.
Keywords :
cognitive radio; probability; queueing theory; radio networks; radio spectrum management; stochastic processes; time division multiple access; PU; Poisson driven stochastic process; SUs; cognitive radio networks; delay reduction; dynamic spectrum access; future generation wireless networks; idle primary user channel; multiple secondary users; opportunistic RF spectrum; queue dynamics; time division multiple access; transmission fairness; waiting probability analysis; Cognitive radio; Dynamic spectrum access; Equations; FCC; Mathematical model; Radio frequency; Wireless networks; Cognitive radio network; dynamic spectrum access; probability of waiting time;
Conference_Titel :
Complex, Intelligent, and Software Intensive Systems (CISIS), 2013 Seventh International Conference on
Conference_Location :
Taichung
Print_ISBN :
978-0-7695-4992-7
DOI :
10.1109/CISIS.2013.13