JOINT OPTIMISATION MODEL OF SIGNAL CHANNEL SELECTION IN COGNITIVE RADIO NETWORKS BASED ON PERCEPTION TIME AND TRANSMISSION TIME
TV Universit · Computer Applications and Software · 2015
In order to ensure that in cognitive radio networks the interference of secondary user on primary user is below a predetermined value while the throughput of the secondary users is maximised and the number of users spectrum lost opportunity is fewer,we present the algorithm of joint optimisation of perception time and transmission time of the second user in single-channel mode. In single-channel model,the secondary users share a same channel with primary users by the mixed access policy,through comprehensive consideration of two factors,the interference on the primary users and the spectrum opportunity lost by the secondary users,the transmission time and perception time are optimised jointly. The effectiveness of the algorithm is verified by the simulation analysis and comparison on the fixed perception time and transmission time algorithm.