3 Definitions and abbreviations

24.2923GPPIP Multimedia (IM) Core Network (CN) subsystem Centralized Services (ICS)Release 17Stage 3TS

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].

CS call: A connection established via the circuit switched domain in accordance with the related procedures e.g. such as described in 3GPP TS 24.008 [7], 3GPP2 C.S0001-D [37] and of which the established bearer is only used within a CS connection but not used as a media stream for a related IM CN subsystem session.

CS media: A media stream established through CS signalling (e.g. 3GPP TS 24.008 [7], 3GPP2 C.S0001-D [37]) and transported through the PSTN with a session description defined by IETF RFC 7195 [36].

IMS Voice over PS Session (IMSVoPS) indicator: An indication from the network indicating that IMS voice over PS session(s) are or are not supported for a specific RAT. The indication is provided by the network to the UE at each NAS registration. When the UE is in S1-mode, the IMSVoPS indicator defined in 3GPP TS 24.301 [11A] applies. When the UE is in Iu-mode or A/Gb mode, the IMSVoPS indicator defined in 3GPP TS 24.008 [7] applies.

NAS combined attach or combined TA update: A NAS attach procedure where the EPS attach type is set to combined EPS/IMSI attach or a NAS tracking area update procedure where the EPS update type is set to "combined TA/LA updating with IMSI attach" or "combined TA/LA updating". See also 3GPP TS 24.301 [11A].

Successful NAS combined attach or combined TA update: The successful outcome of a NAS combined attach procedure where for the NAS attach procedure the EPS attach result is "combined EPS/IMSI attach" without "SMS only" indication or where for the NAS tracking area update procedure the EPS update result is "combined TA/LA updated" or "combined TA/LA updated and ISR activated" without "SMS only" indication. See also 3GPP TS 24.301 [11A].

Failure to access the CS domain: In this specification, failure to access the CS domain includes not receiving a location updating area accept message as specified in 3GPP TS 24.008 [8]) and the NAS sublayer not receiving an indication of successful NAS combined attach or combined TA update.

PSI DN: Is a digit string that conforms to ITU-T Recommendation E.164 [44].

UE in S1-mode: In this specification, a UE in this mode perform an EPS attach procedure with a MME, as defined in 3GPP TS 24.301 [11A].

UE in Iu-mode or UE in A/Gb mode: In this specification, a UE in one of these modes performs a GPRS attach procedure with a SGSN, as defined in 3GPP TS 24.008 [7].

SCC AS enhanced for I1: SCC AS supporting I1 as defined in 3GPP TS 24.294 [11B].

For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.292 [6] apply:

ICS UE

Correlation MSISDN

MSC Server enhanced for ICS

SCC AS

For the purposes of the present document, the following terms and definitions given in 3GPP TS 24.629 [19] apply:

transferee

transferor

transfer target

For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.228 [5] apply:

Public Service Identity (PSI)

For the purposes of the present document, the following terms and definitions given in 3GPP TS 24.229 [11] apply:

Registration expiration interval

For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.003 [3] apply:

CS Domain Routeing Number (CSRN)

IP Multimedia Routeing Number (IMRN)

For the purposes of the present document, the following terms and definitions given in 3GPP TS 24.301 [11A] apply:

CS fallback capable UE

EPS attach result

EPS attach type

EPS update result

EPS update type

Persistent EPS bearer context

TA

For the purposes of the present document, the following terms and definitions given in 3GPP TS 24.008 [7] apply:

routing area (RA)

For the purposes of the present document, the following terms and definitions given in 3GPP TS 44.018 [44] apply:

dual transfer mode (DTM)

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].

ADS Access Domain Selection

AS Application Server

BICC Bearer Independent Call Control

CAMEL Customised Applications for Mobile network Enhanced Logic

CB Communication Barring

CCBS Completion of Communication to Busy Subscriber

CCNL Completion of Communications on Not Logged In

CCNR Completion of Communications on No Reply

CD Communication Deflection

CDIV Communication DIVersion

CFNL Communication Forwarding on Not Logged-in

CFNR Communication Forwarding No Reply

CFNRc Communication Forwarding on subscriber Not Reachable

CFU Communication Forwarding Unconditional

CGI Cell Global Identifier

CN Core Network

CSFB CS Fall Back

CSRN CS domain Routing Number

CW Communication Waiting

DN Directory Number

ECT Explicit Communication Transfer

ICS IMS Centralized Services

IMSVoPS IMS Voice over PS Session

IUA ICS User Agent

HLR Home Location Register

HSS Home Subscriber Server

IM IP Multimedia

IMRN IP Multimedia Routeing Number

MSC Mobile Switching Center

NAS Non Access Stratum

OIP Originating Identification Presentation

OIR Originating Identification Restriction

SCC AS Service Centralization and Continuity Application Server

T-ADS Terminating ADS

TA Tracking Area

TIP Terminating Identification Presentation

TIR Terminating Identification Restriction

UA User Agent

UE User Equipment

URI Universal Resource Identifier