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.
eDRX
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.
GNSS
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.
PSM
Subscriber Identity Module (SIM)
A card used in User Equipment (UE) containing data for subscriber
identification.
SIM
System in Package (SiP)
Several integrated circuits, often from different technologies, enclosed in a single module that performs as a system or subsystem.
SiP
Tracking Area Update (TAU)
A procedure initiated by the UE when moving to a new
tracking area in the LTE (Long-term Evolution) system.
TAU
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).