On cognitive radio networks with opportunistic spectrum access strategies
Li Cui, Jian Cang Xie · Application of Electronic Technique · 2009
In this paper, it presented an opportunistic spectrum access approach for cognitive radio network, which is collection of mobile nodes. In the proposed approach, for each available channel, TDMA frame was consisted of N time slots, and each active cognitive user was assigned one transmission slot different from those of other active cognitive users in each frame. Furthermore, It allowed an active cognitive user utilized the slots pre-assigned to the other active cognitive users under a range of values for accessing opportunity. The paper evaluated the performances of the opportunistic spectrum access approach in view of system throughput and energy efficiency.