How Narrowband Technologies Power the IoT Revolution

Dr. Stamatis Georgoulis, Product Director at Cobham Wireless, recalls the shock operators faced when the iPhone launched in 2007, sparking an unprecedented surge in mobile data consumption.

It took operators years to build the infrastructure necessary to support smartphone services. Now, a decade later, they confront the next seismic shift: the Internet of Things (IoT).

Gartner projected 20.4 billion connected devices by 2020 – roughly three devices per person worldwide – all demanding mobile connectivity. Operators already struggle with capacity shortages, especially in dense urban areas.

Yet the IoT also presents a lucrative revenue stream. By combining connectivity with end‑user hardware and services, operators can unlock new business models. For example, Vodafone recently unveiled its first IoT hardware portfolio, including a car dongle and a 4G security camera.

To harness this opportunity, operators need new connectivity standards that use network resources efficiently and prevent capacity bottlenecks. These standards must undergo rigorous testing and validation to guarantee commercial reliability.

The options for connecting the IoT

Low‑Power Wide‑Area Network (LPWAN) technologies are central to IoT connectivity. Designed for low‑power consumption, LPWAN can keep small devices powered for up to ten years on a single charge and supports cost‑effective chipsets, making devices more affordable.

Operators must decide whether to focus on unlicensed or licensed spectrum. LoRa (developed by Semtech) and SigFox (a French company) operate in unlicensed bands and require new network infrastructure separate from existing cellular systems. While they offer lower cost and ideal for isolated deployments—such as smart campuses or enterprises—they give operators less control over radio traffic compared to traditional cellular.

The most promising protocol for wide‑scale deployment is NarrowBand‑IoT (NB‑IoT), standardized by 3GPP. NB‑IoT operates in licensed spectrum and is fully compatible with operators’ LTE networks, requiring only software upgrades on existing base stations. Its 200 kHz channel bandwidth allows in‑band deployment alongside LTE, enabling massive IoT device density without impacting regular mobile traffic.

Leading operators are making NB‑IoT central to their IoT strategy. Deutsche Telekom launched a commercial NB‑IoT network across Germany, Ireland, and Spain; Vodafone expanded its NB‑IoT coverage to Australia and Greece; TIM rolled out a nationwide NB‑IoT network in Italy. Manufacturers, such as Samsung, are also building NB‑IoT enabled devices.

NB‑IoT is complemented by LTE‑M (CAT‑M), another licensed‑spectrum standard that offers higher data rates—up to ~100 KB/s—making it suitable for smart city and smart‑home energy applications. Operators will typically deploy NB‑IoT and CAT‑M in parallel to cover diverse use cases.

Validating the IoT networks of the future

Operators must ensure their networks can support emerging wireless technologies and the millions of devices that will connect to them. Modern lab solutions can emulate millions of devices, enabling operators to validate performance and scalability before commercial rollout.

By gaining a comprehensive, end‑to‑end view—from core to base station—operators can accelerate the deployment of new IoT standards, deliver superior customer experiences, and open new revenue streams.

The author of this blog is Dr. Stamatis Georgoulis, product director at Cobham Wireless.