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