  This article investigates and evaluate a handover exchange scheme between two
secondary users (SUs) moving in different directions across the handover region
of neighbouring cell in a cognitive radio network. More specifically, this
investigation compares the performance of SUs in a cellular cognitive radio
network with and without channel exchange systems. The investigation shows
reduced handover failure, blocking, forced and access probabilities
respectively, for handover exchange scheme with buffer as compared to the other
scenario.
