Dera: Augmented Random Access For Cellular Networks With Dense H2h-Mtc Mixed Traffic

In addition to the Mobile Broadband (MBB) services, future cellular networks will need to cope with a range of new "Internet of things" (IoT) services. LTE-Advanced and future generation cellular technologies should support both service sets within one network in order to keep the service costs and deployment expenses low. Massive IoT services require much less bandwidth than the MBB services, but the network need to serve a massive number of devices in each cell. The IoT applications put stringent demands on the service reliability and energy efficiency, and some will require very low delay. The existing random access (RA) procedures of cellular networks are not really designed for large numbers of terminals, which may result in excessive collisions, and hence, link delay and waste of precious battery energy. The present work aims at solving this problem by proposing a novel delay-estimation based random access scheme that improves the resolution mechanism of the conventional RA procedure in order to lower delay and energy consumption. The performance evaluation results show that the proposed scheme can significantly reduce the access delay in densely deployed scenarios.