Random-Access Accelerator (RAA): A Framework to Speed Up the Random-Access Procedure in 5G New Radio for IoT mMTC by Enabling Device-To-Device Communications.

Mobile networks have a great challenge by serving the expected billions of (IoT) devices in the upcoming years. Due to the limited simultaneous access in the mobile networks, the devices should compete between each other for resource allocation during a procedure. This contention provokes a non-depreciable delay during the device's registration because of the great number of collisions experienced. To overcome such a problem, a framework called (RAA) is proposed in this work, in order to speed up network access in (mMTC). RAA exploits (D2D) communications, where devices with already assigned resources act like relays for the rest of devices trying to gain access in the network. The simulation results show an acceleration in the registration procedure of 99%, and a freed space of the allocated spectrum until 74% in comparison with the conventional procedure. Besides, it preserves the same device's energy consumption compared with legacy networks by using a custom version of as a wireless technology for D2D communications. The proposed framework can be taken into account for the standardization of mMTC in (5G NR).