Optimization of Sensing Duration Based on Energy Efficiency in OSA

The sensing activity of secondary users is modeled and analyzed with continuous time Markov process,aiming at the opportunistic spectrum access(OSA) system in unslotted primary networks,the optimal sensing duration is a trade-off between sensing performance and transmission efficiencies.An access strategy is designed to control access probability of secondary user,which optimizes the sensing duration and maximizes the energy efficiency of secondary user in the precondition of satisfying the collision constraints.Simulation results show that the secondary user can select the optimal sensing duration to optimize the efficient energy transmission efficiency.