The glossary contains terms and acronyms that are used in this document.

AT command

A command used to control the modem.

AT command

Extended Discontinuous Reception (eDRX)

A method to conserve the battery of an IoT (Internet of Things) device by allowing it to remain inactive for extended periods.


Global Navigation Satellite System (GNSS)

A satellite navigation system with global coverage. The system provides signals from space transmitting positioning and timing data to GNSS receivers, which use this data to determine location.


Power Saving Mode (PSM)

A feature introduced in 3GPP Release 12 to improve battery life of IoT (Internet of Things) devices by minimizing energy consumption. The device stays dormant during the PSM window.


Subscriber Identity Module (SIM)

A card used in User Equipment (UE) containing data for subscriber identification.


System in Package (SiP)

Several integrated circuits, often from different technologies, enclosed in a single module that performs as a system or subsystem.


Tracking Area Update (TAU)

A procedure initiated by the UE when moving to a new tracking area in the LTE (Long-term Evolution) system.


User Equipment (UE)

Any device used by an end-user to communicate. The UE consists of the Mobile Equipment (ME) and the Universal Integrated Circuit Card (UICC).


Universal Integrated Circuit Card (UICC)

A new generation Subscriber Identity Module (SIM) used in UE for ensuring the integrity and security of personal data.