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Content for  TS 23.292  Word version:  18.0.0

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1 Scope  2 References  3 Definitions and abbreviations  3.1 Definitions  3.2 Abbreviations 
...

 

1  Scope  p. 10

This document specifies the architectural requirements for delivery of consistent services to the user regardless of the attached access type (e.g. CS domain access, or IP-CAN). This is achieved by implementing the services in the IP Multimedia Subsystem (IMS).
Consideration is given to how to access specified IMS-based services (see clause 22.4 of TS 22.101) whilst still allowing other, bespoke services to be offered by the home operator.
IMS control of services related to those defined in clause 22.4 of TS 22.101 are part of the present scope of this specification.
The scope of the specification includes:
  • Session establishment when using CS access for media transmission for an IMS service.
  • Support of Service Continuity as specified in TS 23.237.
  • Support of Single Radio Voice Call Continuity as specified in TS 23.216.
  • Access Domain Selection (ADS).
  • IMS control of services where the media is transported via the CS network (e.g. managing of mid-call services).
  • Service data management.
The solution is applicable for UEs with or without ICS functionality, and is applicable for the following deployment scenarios:
  • An operator who supports for their subscribers only UEs that have ICS functionality.
  • An operator who supports for their subscribers only UEs that do not have ICS functionality.
  • An operator who supports for their subscribers UEs which do and do not have ICS functionality (to different subscribers and the same subscribers) ensuring the coexistence of UEs that have and do not have ICS functionality.
  • Inbound roaming subscribers on an operator's network that supports either the same or different ICS functionality that the inbound roaming subscriber is using, ensuring the coexistence of UEs that have and do not have ICS functionality.
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2  References  p. 10

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 23.228: "IP Multimedia Subsystem (IMS)".
[3]
TS 23.002: "Network architecture".
[4]
TS 22.173: "IP Multimedia Core Network Subsystem (IMS) Multimedia Telephony Service and supplementary services".
[5]
TS 23.003: "Numbering, addressing and identification".
[6]
TS 24.008: "Mobile radio interface Layer 3 specification; Core network protocols; Stage 3".
[7]
TS 23.218: "IP Multimedia (IM) session handling; IM call model; Stage 2".
[8]
TS 24.173: "IMS Multimedia Telephony Communication Service and Supplementary Services; Stage 3".
[9]
TS 22.101: "Services Aspects; Service Principles".
[10]
TS 23.221: "Architectural requirements".
[11]
TS 29.163: "Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks".
[12]
TS 23.237: "IP Multimedia Subsystem (IMS) service continuity".
[13]
TS 24.081: "Line Identification Supplementary Services - Stage 3".
[14]
TS 24.082: "Call Forwarding supplementary service; Stage 3".
[15]
TS 24.072: "Call Deflection (CS) Supplementary Service; Stage 3".
[16]
TS 24.088: "Call Barring (CB) Supplementary Service - Stage 3".
[17]
TS 26.114: "A IP Multimedia Subsystem (IMS); Multimedia Telephony; Media handling and interaction".
[18]
TS 24.083: "Call Waiting (CW) and Call Hold (HOLD) supplementary services; Stage 3".
[19]
TS 24.091: "Explicit Call Transfer (ECT) supplementary service; Stage 3".
[20]
TS 24.084: "Multi Party supplementary service - Stage 3".
[21]
TS 24.147: "Conferencing using the IP Multimedia (IM) Core Network (CN) subsystem; Stage 3".
[22]
TS 23.009: "Handover Procedures".
[23]
TS 25.413: "UTRAN Iu interface Radio Access Network Application Part (RANAP) signalling".
[24]
OMA-ERELD-DM-V1_2-20060602-C: "Enabler Release Definition for OMA Device Management, Candidate Version 1.2".
[25]
TS 23.167: "IP Multimedia Subsystem (IMS) emergency sessions".
[26]
TS 24.604: "Communication Diversion (CDIV) using IP Multimedia (IM) Core Network (CN) subsystem Protocol specification".
[27]
3GPP2 C.S0001-D: "Introduction to cdma2000 Spread Spectrum Systems - Revision D".
[28]
TS 24.611: "Anonymous Communication Rejection (ACR) and Communication Barring (CB); using IP Multimedia (IM) Core Network (CN) subsystem Protocol specification".
[29]
TS 24.096: "Name identification supplementary services; Stage 3".
[30]
TS 24.010: "Mobile radio interface layer 3 Supplementary services specification; General aspects".
[31]
TS 24.229: "IP Multimedia Call Control Protocol based on SIP and SDP; Stage 3".
[32]
TS 33.203: "Access security for IP-based services".
[33]
TS 33.210: "Network Domain Security; IP network layer security".
[34]
TS 23.401: "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access".
[35]
TS 23.060: "General Packet Radio Service (GPRS); Service description".
[36]
TS 23.216: "Single Radio Voice Call Continuity (SRVCC); Stage 2".
[37]
TS 23.172: "Technical realization of Circuit Switched (CS) multimedia service; UDI RDI fallback and service modification; Stage 2".
[38]
3GPP2 C.S0042: "Circuit-Switched Video Conferencing Services".
[39]
TR 23.903: "Redial solution for voice-video switching".
[40]  Void.
[41]
TS 22.004: "General on supplementary services".
[42]
TS 24.182: "IP Multimedia Subsystem (IMS) Customized Alerting Tones (CAT)".
[43]
TS 29.292: "Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and MSC Server for IMS Centralized Services (ICS)".
[44]
TS 23.272: "Circuit Switched (CS) fallback in Evolved Packet System (EPS); Stage 2".
[45]
TS 29.002: "Mobile Application Part (MAP) specification".
[46]
TS 23.083: "Call Waiting (CW) and Call Hold (HOLD) supplementary services; Stage 2".
[47]
TS 24.093: "Completion of Calls to Busy Subscriber (CCBS); Stage 3".
[48]
TS 29.328: "IP Multimedia (IM) Subsystem Sh Interface; Signalling flows and message contents".
[49]
TS 23.018: "Basic call handling; Technical realization".
[50]
TS 23.040: "Technical realization of the Short Message Service (SMS); Stage 2".
[51]
TS 23.204: "Support of Short Message Service (SMS) over generic 3GPP Internet Protocol (IP) access; Stage 2".
[52]
TS 24.341: "Support of SMS over IP networks; Stage 3".
[53]
TS 24.011: "Point-to-Point (PP) Short Message Service (SMS) support on mobile radio interface; Stage 3".
[54]
TS 23.278: "Customised Applications for Mobile network Enhanced Logic (CAMEL) Phase 4; Stage 2; IM CN Interworking; Stage 2".
[55]
TS 23.501: "System Architecture for the 5G System; Stage 2".
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3  Definitions and abbreviations  p. 12

3.1  Definitions  p. 12

For the purposes of the present document, the terms and definitions given in TR 21.905 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.
Access Leg:
The call leg between the UE and the SCC AS.
Correlation MSISDN:
An MSISDN used for correlation of sessions.
CS Bearer Control Signalling Path:
Signalling path used to control the call established to set up the CS media bearer between the UE and IMS.
CS domain Routing Number (CSRN):
A CS Domain Routing Number (CSRN) is a routable number that is used to route a call from the IM CN subsystem to the UE in the CS domain. See TS 23.003 for more information.
ICS UE:
An IMS capable UE with additional ICS-specific functionality.
ICS User:
An ICS user is an IMS subscriber that receives communication services centralized in IMS, regardless of the attached access type (e.g. CS domain access, or IP-CAN).
IMS Centralized Services:
See definition in TS 22.101.
IP Multimedia Routing Number (IMRN):
See definition in TS 23.237.
MSC Server enhanced for ICS:
An MSC Server that supports the network based ICS functionality.
Remote Leg:
The call leg formed between the SCC AS and the remote end for presentation of the SIP UA behaviour to IMS on behalf of the UE. The TAS, and other Application Servers are invoked on the Remote Leg.
Service Control Signalling Path:
Signalling path established between the UE and the SCC AS, either directly via an IP-CAN or via CS network elements for service control signalling.
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3.2  Abbreviations  p. 13

For the purposes of the present document, the abbreviations given in TR 21.905 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.
5GC
5G Core Network
ADS
Access Domain Selection
CAA
CS Access Adaptation
CGI
Cell Global Identifier
C-MSISDN
Correlation MSISDN
CSRN
CS domain Routing Number.
DN
Directory Number (e.g. MSISDN)
ICS
IMS Centralized Services
IMRN
IP Multimedia Routing Number.
IN
Intelligent Network
IUA
ICS User Agent
MMTel
Multimedia Telephony
SAI
Service Area Identification
SCC AS
Service Centralization and Continuity Application Server
T-ADS
Terminating ADS
TAS
Telephony Application Server
UDM
Unified Data Management
UE T-ADS
UE assisted Terminating ADS
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