Cognitive Learning-Based Spectrum Handoff for Cognitive Radio Network
Chong Feng, Wenbo Wang, Xiao Feng Jiang · International Journal of Computer and Communication Engineering · 2012
In cognitive radio network, spectrum handoff occurs when primary user appears in the licensed band which is occupied by the cognitive user. Spectrum handoff aims to help cognitive user find suitable channel to resume the unfinished transmission as quickly as possible. In this paper, we propose a cognitive learning algorithm which can be used to decide the order of channel-sensing when the cognitive user needs to carry on spectrum handoff. Both theoretical analysis and simulation results show that using the cognitive learning algorithm to predict the channel status can reduce the average spectrum handoff time compared with the random access algorithm. Index Terms—Spectrum-handoff, average handoff time, cognitive learning algorithm.