In the Universal Mobile Telecommunications System
(UMTS), user equipment
) is any device used directly by an end user to communicate. It can be a hand-held telephone, a card in a laptop computer
, or any other device. It connects to the base station ("Node B
", or 3G Base Transceiver Station
) as specified in the 25-series of specifications. It roughly corresponds to the mobile station
Radio interface between the UE and the Node B is called Uu.
UE handles the following tasks towards the core network:
The corresponding protocols are transmitted transparently via a Node B, that is, Node B does not change, use or understand the information. These protocols are also referred to as Non-access stratum protocols.