A QoS-aware MAC protocol for large-scale networks in Internet of Things

Provisioning quality of service in a large-scale network of resource-constraint heterogeneous devices in Internet of Things is a huge task for providing better application service. Application wise QoS can be achieved by eliminating the unnecessary delay, increasing the throughput, utilizing the dedicated bandwidth fully and also reducing the energy consumption. In this paper, we proposed a scalable MAC protocol in the gap of reservation and contention based protocols. By utilizing the band-limited channels efficiently, this protocol upgrades the access priority of different IoT applications according to their QoS requirements. The proposed scheme also ensures fairness by allowing the low priority applications to transmit their messages by using a priority remodeling method. Our scheme outperforms the other MAC protocols like BaselineMAC, CSMA, HybridMAC and TMAC in terms of energy efficiency, scalability, and latency.