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Content for  TR 23.892  Word version:  8.0.1

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4  Overall requirementsp. 15

5  Architectural requirements and considerationsp. 15

5.1  Basic assumptionsp. 15

5.2  Architectural requirementsp. 16

5.3  UE requirementsp. 17

5.4  Service continuity requirementsp. 17

5.5  Session scenariosp. 17

6  Architecture alternativesp. 20

6.1  Introductionp. 20

6.2  Reference architecture for ICS UEsp. 21

6.3  Architecture for support of non-ICS UEp. 25

6.3a  ICS Architecture for ICS UE and non-ICS UEp. 31

6.4  ICS Reference Pointsp. 35

6.4a  Applicability of the Domain Selection Function to ICSp. 36

6.5  Architectural alternative: I1-ps approachp. 38

6.5.1  Signalling and bearer architecture for full duplex speech over CS accessp. 38

6.5.2  Information flowsp. 40

6.5.3  I1-ps handover scenariosp. 51

6.6  Architectural alternative: I1-cs Application Server approachp. 56

6.6.1  Signalling and bearer architecture for full duplex speech over CS accessp. 56

6.6.2  Assignment of Session Transfer Identifierp. 57

6.6.2a  Registrationp. 58

6.6.2b  Video callp. 67

6.6.3  Information flowsp. 72

6.7  Architectural alternative: I1-cs IMS Adaptor approachp. 90

6.8  Architectural alternative: L-CAAF-n approachp. 105

6.8a  Architectural alternative: Enhanced MSC Server approachp. 106

6.9  CAMEL redirection of CS call to IMSp. 121

6.9a  Deriving ICS specific IMPI/IMPUp. 122

6.10  Requirements on ICCP when using CS accessp. 123

6.11  Media Handlingp. 123

6.12  ICS Data Managementp. 123

6.13  Service Support for ICS UE, using I1-ps and I1-cs approach, ICCC for call setupp. 131

6.14  Service Support for ICS UE using I1-cs approach, CS call control with CAMEL for call setupp. 135

6.15  Domain selection function to ICSp. 140

6.16  Impact on IMSp. 141

6.17  Impact on CS Core Networkp. 141

6.18  Impact on UEp. 141

6.19  Fallback Mechanismsp. 142

6.20  ICS capability exchange between the ICCF and the ICS UEp. 143

7  Conclusionp. 145

A  ICS Service examples with I1-psp. 150

B  Information flow for mid call service using MRFC/MRFPp. 158

C  Comparative analysis of solutions for non ICS UE supportp. 163

D  MGW Realization for the Enhanced MSC Server approachp. 165

$  Change historyp. 167


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