3 Definitions and abbreviations

22.1003GPPTSUMTS Phase 1

3.1 Definitions

For the purposes of the present document, the following terms and definitions apply:

CAC (Connection Admission Control): is a set of measures taken by the network to balance between the QoS requirements of new connections request and the current network utilisation without affecting the grade of service of existing/already established connections

Capability Class: is a piece of information which indicates general UMTS mobile station characteristics (e.g. supported radio interfaces,…) for the interest of the network

Connection mode: characterizes the type of association between two points as required by the bearer service for the transfer of information. A bearer service is either connection-oriented or connectionless. In a connection oriented mode, a logical association called connection needs to be established between the source and the destination entities before information can be exchanged between them. Connection oriented bearer services lifetime is the period of time between the establishment and the release of the connection

In a connectionless mode, no connection is established beforehand between the source and the destination entities ; the source and destination network addresses need to be specified in each message. Transferred information cannot be guaranteed of ordered delivery. Connectionless bearer services lifetime is reduced to the transport of one message.

FC (Flow Control): is a set of mechanisms used to prevent the network from becoming overloaded by regulating the input rate transmissions

GSM BSS: refers in the present document to the GSM/GPRS access network

GSM core network: refers in the present document to the GSM NSS and GPRS backbone infrastructure

Home environment: enables a user to obtain UMTS services in a consistent manner regardless of the user’s location or terminal used (within the limitations of the serving network and current terminal)

Performance: is concerned with the ability to track service and resource usage levels and provides feedback on the responsiveness and reliability of the network

Serving network: provides the user with access to the services of home environment

UMTS core network: refers in the present document to an evolved GSM core network infrastructure or any new UMTS core network infrastructures, integrating circuit and packet switched traffic

UMTS mobile termination: part of the UMTS Mobile Station which provides functions specific to the management of the radio interface (Um)

UMTS network: refers to a network operated by a single network operator and consisting of:

  • UTRAN access networks (WCDMA and/or TD-CDMA);
  • optionally GSM BSS access networks;
  • an UMTS core network.

UPC (Usage Parameter Control): is a set of actions taken by the network to monitor and control the offered traffic and the validity of the connection with respect to the traffic contract negotiated between the user and the network

3.2 Abbreviations

For the purposes of the present document, the following abbreviations apply:

BSS Base Station System

CS Circuit switched

GPRS General Packet Radio Service

GSM Global System for Mobile communications

NSS Network Sub System

PC Personal Computer

PS Packet switched

QoS Quality of Service

SIM GSM Subscriber Identity Module

TD-CDMA Time Division-Code Division Multiple Access


UMTS Universal Mobile Telecommunications System

USIM User Service Identity Module

UTRAN UMTS Terrestrial Radio Access Network

VHE Virtual Home Environment

WCDMA Wideband Code Division Multiple Access