3 Definitions, symbols and abbreviations

24.3903GPPRelease 17Stage 3TSUnstructured Supplementary Service Data (USSD) using IP Multimedia (IM) Core Network (CN) subsystem IMS

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 22.011 [17] apply:

3GPP PS data off

3GPP PS data off exempt service

For the purposes of the present document, the following terms and definitions given in 3GPP TS 24.229 [6] apply:

3GPP PS data off status

For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.122 [19] apply:

Equivalent Home (EHPLMN)

Home PLMN (HPLMN)

Visited PLMN (VPLMN)

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].

AS Application Server

IMS IP Multimedia core network Subsystem

PS Packet Switched

UE User Equipment

USSD Unstructured Supplementary Service Data

USSI Unstructured Supplementary Service Data over IM CN subsystem