A PRMA based MAC protocol for cognitive machine-to-machine communications

M2M communications enables devices with an ability to communicate autonomously and thus acts as the enabling technology for Internet-of-Things. It is expected that a multitude of connected devices will exist in near future. In order to avoid any spectrum scarcity issues, there is a need to explore alternate spectrum opportunities. Thus the need of cognitive radio technology for M2M communications will be indispensable. On the other hand, the unique features of M2M communications create a number of challenges for existing communication networks, especially at the MAC layer. We aim to design a MAC protocol for generic M2M communications that uses cognitive radio technology at the physical layer. For this purpose, we propose PRMA, carry out its feasibility study, adapt and significantly enhance it with modifications especially tailored for M2M communications. Analytical and simulation results show a promising combination for application in practical M2M scenarios.