3 Definitions, symbols and abbreviations

23.1013GPPGeneral Universal Mobile Telecommunications System (UMTS) architectureRelease 17TS

3.1 Definitions

Terms introduced in this document:

Domain: The highest-level group of physical entities. Reference points are defined between domains.

Stratum: Grouping of protocols related to one aspect of the services provided by one or several domains.

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

Cu Reference point between USIM and ME

Iu Reference point between Access and Serving Network domains

Uu Reference point between User Equipment and Infrastructure domains, UMTS radio interface

[Yu] Reference point between Serving and Transit Network domains

[Zu] Reference point between Serving and Home Network domains

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

USIM User Services Identity Module

ME Mobile Equipment

MT Mobile Termination

MExE Mobile Station Application Execution Environment

TE Terminal Equipment