Abstract:

The continuous Markov model is used to model the access process of cognitive users with finite population. In connection with the variability of the number of primary users and cognitive users, the blocking probability, the forced termination probability and the average numbers in channels of cognitive users are analyzed while cognitive users try to occupy the licensed channels. Simulation results show that the blocking probability and the forced termination probability of cognitive users will climb up with the increase of the number of primary users or cognitive users while the average numbers of cognitive users in licensed channels will reduce with the increase of numbers of primary users and grow up with the increase of numbers of cognitive users separately.

Key words: cognitive radio, finite user population, access model, continuous Markov model