3 Definitions, symbols and abbreviations

22.1833GPPCustomized Ringing Signal (CRS) requirementsRelease 17Stage 1TS

3.1 Definitions

For the purposes of the present document, the terms and definitions given in TR 21.905 [1] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 [1].

Ringing Signal: A Ringing Signal is played to the called party as an incoming communication indication during establishment of a communication. It is provided by the UE of the called party.

Customized Ringing Signal: A Ringing Signal that is customized by the calling party or the called party, and it can contain additional media types. It is provided by the network.

CRS inter-action: CRS inter-action is the interaction of the CRS service with other services, e.g. inter-action with Call Forwarding.

CRS inter-working : CRS inter-working is the interworking of a CRS service over different domains or subsystems (CS or IMS) as well as between PLMNs.

CRS content provider: A service provider that provides a set of Ring Signals for use as CRS for subscribes of the CRS service. A 3GPP operator may be a CRS content provider.

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in TR 21.905 [1] and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905 [1].

CRS Customized Ringing Signal