Content for TS 24.292 Word version: 18.0.0
4 Overview of IP Multimedia (IM) Core Network (CN) subsystem centralized services (ICS)
5 Functional entities
6 Roles for registration in the IM CN subsystem
7 Roles for call origination
8 Roles for call modifcation initiated from the ICS UE
9 Roles for call modifcation initiated towards an ICS UE
10 Roles for call termination
11 Roles for session release
12 Supplementary service invocation for ICS
13 Supplementary service configuration for ICS
4 Overview of IP Multimedia (IM) Core Network (CN) subsystem centralized services (ICS) p. 12
4.1 General p. 12
4.2 Underlying network capabilities p. 13
4.3 URI and address assignments p. 13
4.4 Guidelines for use of media feature tags |R11| p. 14
4.5 Networks where IMSVoPS is not homogeneously supported |R10| p. 14
5 Functional entities p. 14
5.1 Introduction p. 14
5.2 User Equipment (UE) p. 14
5.3 MSC Server enhanced for ICS p. 15
5.4 Application Server (AS) p. 15
6 Roles for registration in the IM CN subsystem p. 15
6.1 Introduction p. 15
6.2 ICS UE p. 15
6.3 MSC Server enhanced for ICS p. 16
6.3.1 General p. 16
6.3.2 Initial registration p. 16
6.3.3 Sending the REGISTER request p. 19
6.3.4 Subscription to the registration-state event package p. 19
6.3.5 Reregistration p. 21
6.3.6 Deregistration p. 22
6.4 SCC AS p. 23
7 Roles for call origination p. 23
7.1 Introduction p. 23
7.2 ICS UE p. 24
7.2.1 General p. 24
7.2.2 ICS UE using Gm p. 24
7.2.3 ICS UE using CS p. 24
7.2.4 ICS UE using I1 |R9| p. 24
7.2.5 SDP for ICS UE proposing using a CS audio stream |R11| p. 25
7.2.6 ICS UE setting up a CS call |R11| p. 25
7.2.7 SDP for ICS UE proposing using a CS video stream |R11| p. 25
7.3 MSC Server enhanced for ICS p. 26
7.4 SCC AS p. 27
7.4.1 General p. 27
7.4.2 SCC AS for service control over Gm p. 27
7.4.2.1 CS bearer is requested by the ICS UE p. 27
7.4.2.2 Non CS bearer is requested by the ICS UE p. 28
7.4.3 SCC AS for service control over CS p. 29
7.4.4 SCC AS for service control over I1 |R9| p. 30
7.4.4.1 General p. 30
7.4.4.2 Failure handling p. 31
8 Roles for call modifcation initiated from the ICS UE p. 31
8.1 Introduction p. 31
8.2 ICS UE p. 31
8.2.1 General p. 31
8.2.2 ICS UE is using Gm p. 31
8.3 MSC server enhanced for ICS p. 32
8.4 SCC AS p. 32
9 Roles for call modifcation initiated towards an ICS UE p. 34
9.1 Introduction p. 34
9.2 ICS UE p. 34
9.2.1 General p. 34
9.2.2 ICS UE using Gm p. 34
9.3 MSC server enhanced for ICS p. 35
9.4 SCC AS p. 35
10 Roles for call termination p. 37
10.1 Introduction p. 37
10.2 ICS UE p. 37
10.2.1 General p. 37
10.2.2 ICS UE using Gm p. 37
10.2.2.1 General p. 37
10.2.2.2 Call control over Gm and all media over IP bearer p. 37
10.2.2.3 Call control over Gm and voice or voice and video over CS bearer p. 38
10.2.2.4 Call control over Gm and T-ADS executed by the UE p. 39
10.2.3 ICS UE using CS p. 42
10.2.4 CS fallback p. 42
10.2.5 ICS UE using I1 |R9| p. 42
10.3 MSC Server enhanced for ICS p. 42
10.4 SCC AS p. 43
10.4.1 General p. 43
10.4.2 Terminating Access Domain Selection p. 43
10.4.3 SCC AS for call termination in IM CN p. 44
10.4.4 SCC AS for call control over Gm and voice or voice and video over CS p. 46
10.4.5 SCC AS for call termination to CS network via MSC Server enhanced for ICS p. 47
10.4.6 SCC AS allowing UE to execute T-ADS p. 48
10.4.7 SCC AS for call termination over CS p. 49
10.4.8 SCC AS for call control over I1 and media over CS |R9| p. 50
11 Roles for session release p. 52
11.1 Introduction p. 52
11.2 ICS UE p. 52
11.2.1 General p. 52
11.2.2 ICS UE using Gm p. 52
11.2.3 ICS UE using CS p. 52
11.2.4 ICS UE using I1 |R9| p. 52
11.3 MSC Server enhanced for ICS p. 53
11.4 SCC AS p. 53
12 Supplementary service invocation for ICS p. 54
12.1 Supplementary service invocation for an ICS UE with IMS sessions using CS bearer p. 54
12.1.1 Overview p. 54
12.1.2 Use of Gm reference point p. 54
12.1.2.1 Line ID Services (OIP, OIR, TIP, TIR) p. 54
12.1.2.2 Communication Diversion Services p. 54
12.1.2.3 Communication Barring p. 54
12.1.2.4 Communication Hold/Resume p. 54
12.1.2.5 Explicit Communication Transfer p. 55
12.1.2.6 Conferencing p. 55
12.1.2.7 Communication Waiting p. 55
12.1.3 Void
12.1.4 When use of Gm reference point is not possible due to VPLMN limitations p. 55
12.2 Supplementary service invocation using the MSC Server enhanced for ICS p. 55
12.2.1 Line ID Services (OIP, OIR, TIP, TIR) p. 55
12.2.2 Communication Diversion (CDIV) Services p. 56
12.2.2.1 General p. 56
12.2.2.2 Communication Forwarding Unconditional (CFU) p. 56
12.2.2.3 Communication Forwarding Busy (CFB) p. 56
12.2.2.4 Communication Forwarding No Reply (CFNR) p. 56
12.2.2.5 Communication Forwarding on Not Logged-in (CFNL) p. 56
12.2.2.6 Communication Deflection (CD) p. 56
12.2.2.7 Communication Forwarding on Subscriber Not Reachable (CFNRc) p. 56
12.2.2.8 Void
12.2.2.9 Diversion notifications to originating users p. 56
12.2.3 Communication Barring (CB) p. 57
12.2.4 Communication Hold/Resume p. 57
12.2.5 Explicit Communication Transfer (ECT) p. 57
12.2.6 Conferencing p. 57
12.2.7 Communication Waiting (CW) p. 57
12.2.8 Communication completion services (CCBS/CCNR/CCNL) |R11| p. 58
12.3 Supplementary service invocation for non ICS UE when attached to an MSC Server not enhanced for ICS p. 58
12.3.1 Line ID Services (OIP, OIR, TIP, TIR) p. 58
12.3.2 Communication Diversion services p. 58
12.3.2.1 Communication Diversion services; CFU, CFNL p. 58
12.3.2.2 Communication Diversion services: CFNR, CFB, CFNRc p. 58
12.3.2.3 Communication Diversion services; Communication Deflection p. 58
12.3.3 Communication Barring p. 58
12.3.4 Communication Hold/Resume p. 58
12.3.5 Explicit Communication Transfer p. 58
12.3.6 Conferencing p. 58
12.3.7 User configuration of supplementary services p. 59
12.3.8 Communication completion services |R11| p. 59
13 Supplementary service configuration for ICS p. 59
