For some business cases, where the device mainly receives data from the IoT network and sends virtually no data, the time that the device listens to the network can be adjusted. This arrangement between the device and the network can be extended from every 10 seconds to once every few hours with Extended Discontinuous Reception (eDRX). It lowers battery consumption. The cellular modules can go into a deep, low-power sleep mode (PSM) or only become active (eDRX) when the cellular module needs to connect to the network to transmit data. This results in a significant battery saving. eDRX is available with LTE M and NB-IOT.
24 November 2021