NB IoT system for M2M communication
In 3GPP, a narrowband system based on Long Term Evolution (LTE) is being introduced to support the Internet of Things. This system, named Narrowband Internet of Things (NB IoT) can be deployed in three different operation modes (1) stand alone as a dedicated carrier, (2) in band within the occupied bandwidth of a wideband LTE carrier, and (3) within the guard band of an existing LTE carrier. In stand alone operation mode, NB IoT can occupy one GSM channel (200 kHz) while for in band and guard band operation modes, it will use one physical resource block of LTE (180 kHz) The design targets of NB IoT include low cost devices, high coverage (20 dB improvement over GPRS) long device battery life (more than 10 years) and massive capacity. Latency is relaxed although a delay budget of 10 seconds is the target for exception reports. The specifications for NB IoT are expected to be finalized in 2016. In this paper, we describe the targets for NB IoT and present a preliminary system design. In addition, coverage, capacity, latency, and battery life analysis are also presented.
2016 IEEE Wireless Communications and Networking Conference