OMNeT + + simulation study of cognitive radio based MAC protocol
Li Yu · Automation and Instrumentation · 2014
Cognitive radio emerges in order to solving the increasingly scarce spectrum resources of wireless communication and making full use of spectrum hole of authorized users. The protocol CrMac2, an overlay-based CR MAC protocol with collaboration sensing stage, is presented on the basis of previous researches, and is implemented through using 3 handshake signal acquisition channel in the paper. Then, the simulation experiment is setting to evaluating and comparing the merits of CrMac1, CrMac2 and the one no nodes by the relationship of throughput and load. The results show that, the protocol CrMac2 which increasing collaboration sensing stage, can effectively detect the primary users activities within the scope sensing time, under the premise of ensuring without harmful interference to the primary users, when loads are high, missing the primary number less, and the utilization of the spectrum more.