Group-Based Control Method for Machine Type Communications in LTE System

Machine Type Communication (MTC) devices perform the attach procedure without bit rate limitations, congestion arise at the core network. To prevent such congestion, Long Term Evolution (LTE) takes advantages of the group-based policing to regulate the maximum bit rate of all traffic generated by a group of MTC devices. But previous researches on Access Point Name-Aggregate Maximum Bit Rate (APN-AMBR) based on group-based policing are relatively limited. This study proposes a multi-stage control mechanism, called MSC, to process the operations of maximum bit rate allocation based on resource utilization information. Simulation results indicate that MSC mechanism achieved a higher overall throughput for all MTC devices. For the purpose of performance evaluation, a M/G/k/k Markov chain was used to analyze the time controlled MTC application in LTE networks. The simulation results revealed that the throughput of MSC is 28% higher than that of the LTE standard model by using the group-based policing.