In the Universal Mobile Telecommunications System

Universal Mobile Telecommunications System

Universal Mobile Telecommunications System is a third generation mobile cellular technology for networks based on the GSM standard. Developed by the 3GPP , UMTS is a component of the International Telecommunications Union IMT-2000 standard set and compares with the CDMA2000 standard set for...

 (UMTS) and 3GPP Long Term Evolution

3GPP Long Term Evolution

3GPP Long Term Evolution, usually referred to as LTE, is a standard for wireless communication of high-speed data for mobile phones and data terminals. It is based on the GSM/EDGE and UMTS/HSPA network technologies, increasing the capacity and speed using new modulation techniques...

 (LTE), user equipment (UE) is any device used directly by an end-user to communicate. It can be a hand-held telephone, a laptop computer equipped with a mobile broadband

Mobile Broadband

Mobile broadband is the marketing term for wireless Internet access through a portable modem, mobile phone or other mobile device.-Description:...

 adapter, or any other device. It connects to the base station

Base Transceiver Station

A base transceiver station or cell site is a piece of equipment that facilitates wireless communication between user equipment and a network. UEs are devices like mobile phones , WLL phones, computers with wireless internet connectivity, WiFi and WiMAX gadgets etc...

 Node B/eNodeB as specified in the ETSI 125/136-series and 3GPP

3GPP

The 3rd Generation Partnership Project is a collaboration between groups of telecommunications associations, known as the Organizational Partners...

 25/36-series of specifications. It roughly corresponds to the mobile station

Mobile Station

The mobile station comprises all user equipment and software needed for communication with a mobile network.The mobile station refers to global system connected to the mobile network, i.e. mobile phone or mobile computer connected using a mobile broadband adapter. This is the terminology of 2G...

 (MS) in GSM systems.

The radio interface between the UE and the Node B is called Uu.

Functionality

UE handles the following tasks towards the core network:

• Mobility management
  Mobility management
  Mobility management is one of the major functions of a GSM ora UMTS network that allows mobile phones to work. The aim of mobility management is to track where the subscribers are, allowing calls, SMS and other mobile phone services to be delivered to them....
  
  
• Call control
• Session management
• Identity management

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

Non Access Stratum

Non-access stratum is a functional layer in the UMTS wireless telecom protocol stack between a core network and user equipment.The layer supports signalling and traffic between those two elements. +- – - – - -+ +- – - – - – -+...

protocols.

External links

• http://www.3gpp.org/ftp/Specs/html-info/25-series.htm
• http://www.3gpp.org/ftp/Specs/html-info/36-series.htm