availability of spectrum resource through spectrum sensing and coordinate with the other secondary users (SUs) for spectrum access, so that the spectrum resource is efficiently utilized without harmful interference to the primary users (PUs).
In cognitive radio networks, the media access control (MAC) protocols need to determine the availability of spectrum resource through spectrum sensing and coordinate with the other secondary users (SUs) for spectrum access, so that the spectrum resource is efficiently utilized without harmful interference to the primary users (PUs).