3 Definitions and abbreviations

03.673GPPenhanced Multi Level Precedence and Pre-emption service (eMLPP)Stage 2TS

3.1 Definitions

Definitions used in the present document are also defined in GSM 02.67.

resource pre-emption: The termination of a call of a low priority user such that resources can be made available for a precedence call of higher priority. Resource pre-emption could be initiation resource pre-emption or handover resource pre-emption.

called-party pre-emption: Termination of a call to a particular user when a higher priority call is directed towards that specific user. Called party pre-emption is decided by the Mobile Station. In case of point-to-point calls, this shall be performed by Call Waiting with automatic acceptance of the waiting call by the Mobile Station.

compatible Mobile Station: Mobile stations which support eMLPP and therefore have precedence and pre-emption capabilities.

non-compatible Mobile Station: Mobile stations which do not support eMLPP.

3.2 Abbreviations

Abbreviations used in the present document are listed in GSM 01.04.

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

eMLPP enhanced Multi-Level Precedence and Pre-emption

VBS Voice Broadcast Service

VGCS Voice Group Call Service