A Study on Medium Access Control for Throughput Maximization in IoT Networks

Internet of Things (IoT) is an ecosystem of connected physical objects such as sensors, vehicles, electronic equipment’s etc. that are accessible through the internet. With increasing number of users, large data being generated and limited bandwidth available for IoT macro-cells, efficient multiplexing techniques are needed that use the available bandwidth efficiently. Non-Orthogonal Multiple access is a technique in which multiple users data is separated in the power domain and it is one of the most effective multiplexing techniques. The major challenges with NOMA based IoT networks are decreasing throughput with increasing path loss factor, increase in throughput with increased power levels but reduced battery life of IoTDs and BER degradation for far or weak users. Medium Access Control (MAC) plays a critical role in managing access to the transmission medium in a network. By defining access rules, preventing data collisions, incorporating QoS mechanisms, ensuring synchronization, and using addressing mechanisms, MAC protocols help to ensure that data is transmitted efficiently and reliably in a network.The paper presents a comprehensive review on Medium Access Control (MAC) for NOMA enabled IoT networks.