Improved MAC Design-based Dynamic Duty Cycle for Vehicular Communications over M2M System

With the growing proliferation of machine to machine (M2M) applications, several terminals will be deployed in many types of applications such as health, surveillance, industrial automation and especially transportation. This work concentrates on M2M networks in the intelligent transportation system (ITS) and considers areas of enhanced vehicular networking for M2M concepts. In M2M communications, an efficient medium access control (MAC) is important to avoid such collisions by helping devices to decide when and how to access support. This paper intends to develop robust MAC protocol-based contention to be used in intra-cluster for vehicular communication over M2M system. Our proposed is a multi-layers MAC protocol with an adaptive duty cycle that reduces the amount of energy wasted on idle listening via sending all messages in a variable active period according to a load of traffic and return to sleep mode. Simulation results illustrate that our proposed outperforms other traditional MAC protocols in terms of energy consumption, average delay and collisions probability.