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TS 23.206
Voice Call Continuity (VCC) between
Circuit Switched (CS) and
IP Multimedia Subsystem (IMS); Stage 2

3GPP‑Page   ETSI‑search  
V7.5.0 (PDF)  2007/12  38 p.
Rapporteur:
Mr. Bennett, Andy

Table of Contents for  TS 23.206  Word version:  7.5.0

1Scope  p. 6
2References  p. 6
3Definitions, symbols and abbreviations  p. 7
3.1Definitions  p. 7
3.2Abbreviations  p. 7
4VCC Concepts  p. 8
4.1General  p. 8
4.2Radio environments  p. 8
4.3Domain selection  p. 8
4.4Anchoring in IMS of VCC subscriber calls  p. 9
4.4.1Calls originated by VCC subscribers  p. 9
4.4.2Calls terminated to VCC subscribers  p. 9
4.5Domain transfer procedures  p. 9
4.6Regulatory aspects  p. 10
5Architecture  p. 10
5.1General  p. 10
5.2Reference model  p. 10
5.3VCC entities  p. 12
5.3.1VCC application  p. 12
5.3.1.1General  p. 12
5.3.1.2Functional Entities used by the VCC application  p. 12
5.3.1.2.1Domain Transfer Function (DTF)  p. 12
5.3.1.2.2Domain Selection Function (DSF)  p. 12
5.3.1.2.3CS Adaptation Function (CSAF)  p. 13
5.3.1.2.4CAMEL Service  p. 13
5.3.2VCC UE  p. 13
5.4Reference points  p. 14
5.4.1DTF - S-CSCF, CSAF - S-CSCF, DSF - S-CSCF reference point (ISC)  p. 14
5.4.2CSAF - I-CSCF, DTF - I-CSCF reference point (Ma)  p. 14
5.4.3Functional entity - HSS reference point  p. 14
5.4.4gsmSCF - VMSC reference point  p. 14
5.4.5gsmSCF - HSS reference point  p. 14
5.4.6VCC Application - VCC UE reference point (V3)  p. 14
6Information flows and procedures  p. 14
6.1Registration  p. 14
6.1.1CS domain registration  p. 14
6.1.2IMS registration  p. 15
6.2Origination  p. 15
6.2.1General  p. 15
6.2.2VCC UE origination from CS domain  p. 15
6.2.2.1General  p. 15
6.2.2.2UE origination from CS domain using CAMEL  p. 16
6.2.3VCC UE origination from IMS domain  p. 17
6.3Termination  p. 17
6.3.0General  p. 17
6.3.1Terminated call coming from CS  p. 18
6.3.2Terminated call coming from IMS  p. 18
6.3.3Terminated call directed to CS  p. 18
6.3.4Terminated call directed to IMS  p. 19
6.4Domain transfer  p. 21
6.4.1Domain transfer procedures  p. 21
6.4.1.1General  p. 21
6.4.1.2Enablement of domain transfer procedures  p. 21
6.4.1.3Execution of domain transfer procedures  p. 22
6.4.1.4Access Leg Update toward the remote end  p. 23
6.4.1.5Source Access Leg Release  p. 24
6.4.2Domain transfer information flows  p. 24
6.4.2.1Domain transfer: IMS to CS domain  p. 24
6.4.2.2Domain transfer: CS domain to IMS  p. 26
6.4.2.3Subsequent domain transfers  p. 26
6.4.3Void  p. …
6.5Supplementary services  p. 27
6.5.1General  p. 27
6.5.2Supplementary services behaviour  p. 27
6.5.2.1General  p. 27
6.5.2.2Line Identification supplementary services  p. 27
6.5.2.2.1General  p. 27
6.5.2.2.2IMS: Originating Identification Presentation (OIP), CS: Calling Line Identity Presentation (CLIP)  p. 27
6.5.2.2.3IMS: Terminating Identification Presentation (TIP), CS: Connected Line Identity Presentation (COLP)  p. 27
6.5.2.2.4IMS: Originating Identification Restriction (OIR), CS: Calling Line Identity Restriction (CLIR)  p. 27
6.5.2.2.5IMS: Terminating Identification Restriction (TIR), CS: Connected Line Identity Restriction (COLR)  p. 27
6.5.2.3IMS: Communication Diversion (CDIV), CS: Call Forwarding supplementary services  p. 27
6.5.2.4IMS: Communication Hold, CS: Call Wait and CS: Call Hold supplementary services  p. 28
6.5.2.5IMS: Conference (CONF), CS: Multiparty (MPTY) supplementary service  p. 28
6.5.2.6IMS: Call Barring (CB), CS: Call Barring (Operator Determined and supplementary service)  p. 28
6.5.3Impact of service behaviour  p. 28
6.6CAMEL services  p. 28
6.7Presence services  p. 29
6.8Other procedures  p. 29
6.8.1User preferences and operator policy  p. 29
7Security  p. 29
7.1General  p. 29
7.2Access security for CS Domain  p. 29
7.3Access security for IMS  p. 29
8Charging  p. 30
8.1General description  p. 30
8.2Charging strategy  p. 30
8.3Accounting strategy  p. 30
ACall diversion techniques from CS to IMS  p. 31
A.1Implementation options for call diversion from CS to the DTF in IMS  p. 31
BDomain selection for VCC  p. 33
CTechniques for the prevention of circular looping for CS Terminations  p. 34
C.1Implementation options prevention of circular looping for CS Terminations  p. 34
$Change history  p. 36

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