What is mMTC?
mMTC is one of the three 5G use case categories defined by IMT-2020, designed for connecting a massive density of low-power, low-data-rate IoT devices — targeting up to 1 million connections per km². The focus is not on speed or latency, but on extreme device density, ultra-low device cost, and battery lifetimes exceeding 10 years.
How Does mMTC Work?
mMTC devices use NB-IoT (180 kHz bandwidth, up to 250 kbps) or LTE-M/eMTC (1.4 MHz, up to 1 Mbps), both standardised within the 3GPP LTE framework and operating in 5G NR spectrum via spectrum sharing. 5G NR RedCap (Release 17) extends mMTC support to mid-capability devices. Power-saving features include PSM (Power Saving Mode), eDRX, and coverage enhancement (HARQ repetitions).
Use Cases
Smart metering, environmental sensors, agricultural monitoring, smart parking, industrial asset tracking, connected wearables, flood/earthquake sensors.
3GPP / Standards Reference
ITU-R M.2083 (IMT-2020 Vision), 3GPP TS 36.888 (NB-IoT), TS 38.875 (NR RedCap Study Item)
Related Terms
IoT | eMBB | uRLLC | IMT-2020 | Private 5G
Learn More
This glossary entry is part of the 5GWorldPro Complete 5G Glossary. To go deeper into 5G architecture and technology, explore our 5G Training courses.
