3 Definitions and abbreviations

24.2943GPPIP Multimedia Subsystem (IMS) Centralized Services (ICS) protocol via I1 interfaceRelease 17TS

3.1 Definitions

For the purposes of the present document, the terms and definitions given in 3GPP 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 3GPP TR 21.905 [1].

For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.292 [2] apply:

ICS UE

SCC AS

For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.237 [7] apply

Access Transfer

Service Control Signalling Path

Session Transfer Identifier (STI)

For the purposes of the present document, the following terms and definitions given in 3GPP TS 24.292 [5] apply:

PSI DN

For the purposes of the present document, the following terms and definitions given in 3GPP TS 24.229 [12] apply:

default public user identity

Stable I1 Session: An session which is setup by the ICS UE using the CS bearer, and for which service control via the I1 interface is applicable.

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP 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 3GPP TR 21.905 [1].

ICS IMS Centralized Services

SCC AS Service Centralization and Continuity Application Server

STI Session Transfer Identifier

USSD Unstructured Supplementary Service Data