Cognitive radio network can improve under-utilized licensed wireless channels called the primary channels where secondary users (SUs) can opportunistically share the primary channels allocated to primary users (PUs) but which are not used by the PUs. This paper proposes a priority-based reservation medium access control protocol in cognitive radio network where a common control channe... https://www.bekindtopets.com/great-save-C3-dermatome-13020-great-choice/