Performance evaluation of random access response estimation scheme for IoT communications

This paper analyzed the performance of the LTE random access (RA). We describes a RA performance analysis simulator for LTE to support massive number of devices. To evaluate the performance, we developed new modules to simulate LTE's RA procedures because there is a limit when it accommodate massive number of devices in existing LTE module. This paper also represents performance analysis results according to the number of preambles and maximum number of preamble transmissions in the same environment with 3GPP TR 37.868. With this results, we proposed the random access response (RAR) estimation scheme. As a result, the performance of RA is greatly improved compared to conventional RA.