Performance Analysis of Sequential Method for Handover in Cognitive Radio Networks
Powerful spectrum handover schemes enable Cognitive Radios (CRs) to use transmission opportunities in primary users' channels appropriately. In this paper, the authors consider the cognitive access of primary channels by a Secondary User (SU). They evaluate the average detection time and the maximum achievable average throughput of the SU when the Sequential Method for Hand-Over (SMHO) is used. They assume that a prior knowledge of the primary users' presence and absence probabilities are available. In order to investigate the maximum achievable throughput of the SU, they end into an optimization problem, in which the optimum value of sensing time must be selected. In their optimization problem, they take into account the spectrum hand over due to false detection of the primary user.