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Content for  TR 23.831  Word version:  10.0.0

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4  Scenarios and Operationsp. 8

5  Architectural Requirements and Assumptionsp. 18

6  Architecture Alternativesp. 20

6.1  Alternative 1p. 20

6.1.1  Architecture Reference Modelp. 20

6.1.2  Control and User Plane Pathsp. 21

6.1.3  Information Flowsp. 21

6.1.3.1  Generalp. 21

6.1.3.2  Establishment of Collaborative Session upon Originating IMS Session Setupp. 22

6.1.3.3  Establishment of Collaborative Session upon Terminating IMS Session Setupp. 27

6.1.3.4  Transfer of Collaborative Session Controlp. 32

6.1.3.5  Media flow transfer initiated by the target UEp. 39

6.1.3.6  Media flow transfer initiated by UE other than the target UEp. 46

6.1.3.7  Session Replication by remote partyp. 54

6.1.3.8  Media Flow Replication by networkp. 58

6.1.3.9  Inter-UE Transfer between IMS UEs and CS UEsp. 63

6.1.3.10  Session Discoveryp. 65

6.1.3.11  Collaborative Session handling upon loss of Collaborative Session Controlp. 66

6.1.3.12  Media modification among UEs under different subscriptionsp. 68

6.1.3.13  IUT without establishing a Collaborative Session between UEs belonging to different IMS subscription within same operatorp. 70

6.1.4  Collaboration Profilep. 73

6.1.5  Execution of supplementary servicesp. 74

7  Conclusionsp. 76

$  Change historyp. 79


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