A cooperative opportunistic spectrum access scheme in cognitive cellular networks

In this paper, to decrease the energy consumption, we propose a cooperative opportunistic spectrum access (OSA) scheme in cognitive cellular networks to reduce the number of the spectrum handoff. A three dimension continuous-time Markov chain (CTMC) is employed to model the OSA schemes in the cognitive cellular networks, and the grade of service (GoS) performance metrics is derived. Simulations are conducted to verify the theoretical analysis, and the results show the GoS improvements of the proposed cooperative OSA scheme.