Narrowband IoT (NB-IoT)
NB-IoT is a 3GPP cellular low-power wide-area technology, introduced in Release 13, that uses a narrow slice of licensed spectrum to connect large numbers of low-data-rate, battery-powered devices with deep indoor coverage.
NB-IoT occupies a narrow carrier of about 200 kHz and can be deployed standalone, in the guard band of an LTE carrier or within an LTE carrier. It supports low data rates and simplified, low-cost device modules, and it repeats transmissions to extend coverage into basements and other locations that conventional mobile signals struggle to reach. Power saving mode (PSM) and extended discontinuous reception (eDRX) let devices sleep for long periods between communications.
NB-IoT is used for smart water and gas meters, parking sensors, environmental monitoring, building sensors and stationary industrial assets that send small amounts of data infrequently. Because it runs on mobile operator networks, it avoids the need to deploy private gateways, and it benefits from operator-grade security and SIM-based authentication.
NB-IoT has limited mobility support, relatively high latency and low throughput, so it suits stationary monitoring rather than real-time or mobile applications, where LTE-M is often preferred. Availability depends on operator coverage and roaming agreements in each country, and network sunset plans should be checked for long-life deployments. Devices are often managed using protocols such as LwM2M over CoAP.
Key points
- 3GPP cellular LPWAN introduced in Release 13
- Narrow carrier of about 200 kHz in licensed spectrum
- Deployable standalone, in an LTE guard band or within an LTE carrier
- PSM and eDRX enable long battery life
- Suits stationary, low-data monitoring rather than mobile use
Where AiVibe comes in
AiAmbA IoT is AiVibe's edge protocol layer: it discovers devices and normalises industrial signals, with supported protocols including Siemens S7, Mitsubishi MC, Delta Modbus, OPC UA and MQTT, and driver availability confirmed per installation. Writes to machines are deny-by-default.