Link adaptation for Coverage Enhancement in NB-IoT

Abstract

The cellular connectivity problems are rectified by the Narrowband Internet of Things (NB-IoT) and this NB-IoT introduced by the Third Generation Partnership Project (3GPP) under release-13 (R-13). The main application of the NB-IoT is to connect the massive number of IoT devices for both low complexity and low power devices. The main goal of the NB-IoT is to enhance the coverage when compared to traditional short-range communication devices such as Bluetooth, Wi-Fi, ZigBee, etc. To enhance the coverage in NB-IoT, we introduce three techniques namely, Resource Unit Alteration, Bandwidth Alteration, Repetitions Alteration by employing Signal to Noise ratio (SNR), Bandwidth Utilization (BWU), and Energy per transmitted bits (ETb) and also,studythe effect of Bandwidth, Repetitions, the transmission time for concerning Maximum Coupling Loss (MCL). Furthermore, we proposed to implement theuplink adaptation mechanism to enhance the coverage in the NB-IoT.