Title :
A Predictive Opportunistic Access Scheme for Cognitive Radios
Author :
Senthuran, S. ; Anpalagan, A. ; Das, O.
Author_Institution :
Dept. of Electr. & Comput. Eng., Ryerson Univ., Toronto, ON, Canada
Abstract :
We propose a novel opportunistic access scheme for cognitive radios that considers the channel gain as well as the predicted idle channel probability. In contrast to previous works where a cognitive user vacates a channel only when that channel becomes busy, our scheme requires the cognitive user to switch to the channel with the next highest idle probability if the current channel´s gain is below a certain threshold. We derive the threshold values that maximize the long term throughput for various transition probabilities and compare our throughput results to those obtained using a non-channel adaptive scheme. We also provide simulation results that validate our analytical results.
Keywords :
adaptive systems; cognitive radio; probability; cognitive radios; cognitive user; idle channel probability; nonchannel adaptive scheme; predictive opportunistic access scheme; Analytical models; Cognitive radio; Fading; History; Random variables; Rayleigh channels; State estimation; Steady-state; Switches; Throughput;
Conference_Titel :
Vehicular Technology Conference Fall (VTC 2009-Fall), 2009 IEEE 70th
Conference_Location :
Anchorage, AK
Print_ISBN :
978-1-4244-2514-3
Electronic_ISBN :
1090-3038
DOI :
10.1109/VETECF.2009.5378967