Content for TS 24.294 Word version: 18.0.0
4 General description
4.1 General
4.2 Structure of the protocol
5 Functional entities
5.1 User Equipment (UE)
5.2 Application Server (AS)
6 Communication between ICS UE and SCC AS via I1 interface
6.1 Introduction
6.2 Session control procedures
6.3 Supplementary services control procedures
6.4 SCC AS and ICS UE Time Synchronization
4 General description p. 11
4.1 General p. 11
4.2 Structure of the protocol p. 11
5 Functional entities p. 13
5.1 User Equipment (UE) p. 13
5.2 Application Server (AS) p. 13
6 Communication between ICS UE and SCC AS via I1 interface p. 13
6.1 Introduction p. 13
6.2 Session control procedures p. 13
6.2.1 Session setup p. 13
6.2.1.1 General p. 13
6.2.1.2 Detailed behaviour of ICS UE p. 14
6.2.1.2.1 ICS UE CS Session Origination p. 14
6.2.1.2.2 ICS UE CS Session Termination without UE assisted T-ADS p. 15
6.2.1.2.3 ICS UE CS Session Termination with UE assisted T-ADS p. 17
6.2.1.2.4 Failure p. 17
6.2.1.3 Detailed behaviour of SCC AS p. 18
6.2.2 Void
6.2.3 Session release p. 23
6.2.3.1 General p. 23
6.2.3.2 Detailed behaviour of ICS UE p. 23
6.2.3.3 Detailed behaviour of SCC AS p. 24
6.2.3A I1 session setup when invoking mid-call supplementary service p. 24
6.2.3A.1 General p. 24
6.2.3A.2 Detailed behaviour of ICS UE p. 25
6.2.3A.2.1 Mid-call service initiated by ICS UE p. 25
6.2.3A.2.2 Mid-call service initiated by SCC AS p. 25
6.2.3A.3 Detailed behaviour of SCC AS p. 26
6.2.4 Adding I1 control to existing CS session (I1 Augmentation) p. 27
6.2.4.1 General p. 27
6.2.4.2 Detailed behaviour of ICS UE p. 27
6.2.4.3 Detailed behaviour of SCC AS p. 27
6.2.5 Service control transfer (Gm fallback to I1) p. 28
6.2.5.1 General p. 28
6.2.5.2 Service continuity while retaining the use of CS access for media p. 28
6.2.5.3 Service continuity when transferring from PS access to CS access p. 30
6.2.5.3.1 Detailed behaviour of UE p. 30
6.2.5.3.2 Detailed behaviour of SCC AS p. 31
6.2.5.3.3 P-CSCF releasing the source access leg during transferring from PS access to CS access p. 32
6.2.5.5 Service continuity after transferring multiple calls from PS access to CS access using SRVCC p. 32
6.2.6 Assignment of single CS bearer to I1 sessions p. 32
6.3 Supplementary services control procedures p. 35
6.3.0 Introduction p. 35
6.3.1 Line ID Services (OIP, OIR, TIP, TIR) p. 36
6.3.1.1 Originating Identity Presentation (OIP) p. 36
6.3.1.2 Originating Identity Restriction (OIR) p. 36
6.3.1.3 Terminating Identity Presentation (TIP) p. 36
6.3.1.4 Terminating Identity Restriction (TIP) p. 36
6.3.2 Communication diversion services (CDIV) p. 36
6.3.2.1 Communication Forwarding Unconditional (CFU) p. 36
6.3.2.2 Communication Forwarding on Not Logged-in (CFNL) p. 36
6.3.2.3 Communication Forwarding Busy (CFB) p. 36
6.3.2.4 Communication Forwarding No Reply (CFNR) p. 37
6.3.2.5 Communication Forwarding on Subscriber Not Reachable (CFNRc) p. 37
6.3.2.6 Communication Deflection (CD) p. 37
6.3.2.7 Communication Diversion Notification (CDIVN) p. 37
6.3.4 Communication Hold (HOLD)/Resume p. 38
6.3.5 Consultative Explicit Communication Transfer p. 39
6.3.6 Conference calling (CONF) p. 40
6.3.6.0 General p. 40
6.3.6.1 Actions at the ICS UE p. 40
6.3.6.1.1 Conference creation with a conference factory URI p. 40
6.3.6.1.2 Inviting other users to a conference p. 40
6.3.6.1.3 User joining a conference by using a conference URI p. 41
6.3.6.1.4 Conference participant leaving a conference p. 41
6.3.6.1.5 Conference focus removes conference participant from a conference p. 41
6.3.6.2 Actions at the SCC AS p. 42
6.3.7 Communication Waiting p. 42
6.4 SCC AS and ICS UE Time Synchronization p. 42
