Content for TR 23.838 Word version: 9.0.0
4 Inter-UE Transfer
5 Other IMS Service Continuity enhancements
6 Conclusion
A List of IUT procedures
$ Change history
4 Inter-UE Transfer p. 8
4.1 Architectural Requirements and Assumptions p. 8
4.2 Scenarios p. 10
4.2.1 IUT Keep Collaborative Session control p. 11
4.2.2 IUT Transfer Collaborative Session control p. 11
4.2.3 Add new media flows in an ongoing multimedia session of different UEs p. 12
4.2.4 Remove media flows bound to different UEs of an ongoing Collaborative Session p. 13
4.3 Controller UE and Controllee UE operations for an existing Collaborative Session p. 13
4.3.1 Overview p. 13
4.3.2 Controller UE Operations (Collaborative Session control) p. 15
4.3.3 Controllee UE Operations (media control) p. 15
4.4 General Principles and Description p. 15
4.5 Architecture Reference Model p. 16
4.5.1 Architecture Alternative 1 p. 16
4.5.1.1 Overview p. 16
4.5.1.2 Signalling and Bearer Architecture p. 17
4.5.1.5 Information flows p. 17
4.5.1.5.1 Collaborative Session establishment p. 17
4.5.1.5.2 during established Collaborative Session p. 19
4.5.1.5.2.1 Controller Initiated Procedures p. 19
4.6 UE Awareness p. 23
4.6.1 General p. 23
4.6.2 Alternative 1 - Based on user configuration p. 24
4.6.3 Alternative 2 - Based on dynamic discovery p. 24
4.6.3.1 Dynamic discovery based on IMS registration p. 24
4.6.3.2 Capability query p. 24
4.6.3.3 Dynamic discovery based on presence p. 24
4.6.3.4 Example information flow p. 24
4.6.4 Evaluation of the alternatives p. 25
4.7 Information of Collaborative Session p. 26
4.8 Execution of supplementary services p. 27
4.8.1 General p. 27
4.8.2 Originating Identification Presentation (OIP) p. 27
4.8.3 Originating Identification Restriction (OIR) p. 27
4.8.4 Terminating Identification Presentation (TIP) p. 28
4.8.5 Terminating Identification Restriction (TIR) p. 28
4.8.6 Communication Diversion (CDIV) p. 28
4.8.7 Communication Hold (HOLD) p. 28
4.8.8 Communication Barring (CB) p. 28
4.8.9 Message Waiting Indication (MWI) p. 28
4.8.10 Conference (CONF) p. 28
4.8.11 Explicit Communication Transfer (ECT) p. 28
4.8.12 Advice of Charge (AOC) p. 29
4.8.13 Closed User Groups (CUG) p. 29
4.8.14 Three-Party (3PTY) p. 29
4.8.15 Flexible Alerting (FA) p. 29
4.8.16 Communication Waiting (CW) p. 29
4.8.17 Completion of Communications to Busy Subscriber (CCBS)/Completion of Communications by No Reply (CCNR) p. 29
4.8.18 Customized Alerting Tones (CAT) p. 29
5 Other IMS Service Continuity enhancements p. 29
5.1 General p. 29
5.2 Operator policy and user preferences p. 29
5.3 Interaction and coexistence with underlying mobility mechanisms and corresponding policies p. 29
5.4 Support of mid-call services during session transfer p. 30
5.4.1 Architectural Requirements p. 30
5.4.2 Alternative 1: MSC Server enhancement to support mid-call services during session transfer p. 30
5.4.2.1 PS-CS Assumptions p. 30
5.4.2.2 Access Transfer (PS - CS) concepts p. 30
5.4.2.3 Procedures and Flows p. 31
5.4.2.3.1 PS - CS Access Transfer: PS to CS - Dual Radio p. 31
5.4.2.3.2 PS - CS Access Transfer: PS to CS - Single Radio p. 32
5.4.2.3.3 PS - CS Access Transfer: PS to CS - Single Radio, incoming call in alerting phase p. 34
5.4.2.3.4 PS - CS Access Transfer: PS to CS - Single Radio, outgoing call in alerting phase p. 36
5.4.2.3.5 Information Flow for Dual Radio CS to PS transfer p. 38
5.4.2.4 Co-existence of ICS UE and MSC Server assisted mid-call support p. 38
5.4.3 Alternative 2: Use of 24.008 CC TI to support mid-call services during session transfer p. 38
5.4.3.1 Overview p. 38
5.4.3.2 Information Flow for Dual Radio CS to PS transfer p. 39
5.4.3.3 Information Flow for Dual Radio PS to CS transfer p. 41
5.4.3.4 Information Flow for Single Radio PS to CS transfer p. 42
5.4.4 Alternative 3: Use of STI to support mid-call services during session transfer p. 43
5.4.4.1 Overview p. 43
5.4.4.2 Information Flow for Dual Radio CS to PS transfer p. 43
5.4.4.3 Information Flow for Dual Radio PS to CS transfer p. 43
5.4.4.4 Information Flow for Single Radio PS to CS transfer p. 44
5.4.5 Evaluation of the alternatives p. 45
5.4.5.1 UE capability p. 45
5.5 Session Continuity for speech and video over CS p. 46
5.6 Architecture p. 46
6 Conclusion p. 46
6.1 Conclusion on Inter-UE Transfer p. 46
6.1.1 Conclusion on UE awareness p. 46
6.1.2 Collaborative Session p. 46
6.1.3 UEs not supporting IUT p. 46
6.2 Conclusion on support of mid-call services during session transfer p. 47
A List of IUT procedures p. 48
$ Change history p. 51
