Secondary user dominated channel reservation in Cognitive Radio

Channel reservation is used to decrease the drop ratio of secondary users caused by spectrum handover. This paper considers the maintainer of the reserved channels in one secondary system coexisting with multiple primary systems. The global channel reservation scheme, the user channel reservation scheme, and the user-updated channel reservation scheme are proposed, derived by different Markov models. Numerical results show that the global channel reservation scheme performs higher throughput than the user-updated/user channel reservation schemes, while the user-updated channel reservation scheme gains the lowest drop ratio among the three schemes.