Content for TR 29.882 Word version: 8.0.1
2 References
3 Definitions, symbols and abbreviations
4 Overview of CAT service requirements in the 3GPP CS domain
5 Architectural aspects
6 CAT service provisioning, activation & deactivation, configuration
7 CAT call flows
8 Interaction with other features
9 Interworking with other networks
10 Technical analysis &architectures assessment
11 Conclusions and recommendations
A Impacts to Existing Specifications
$ Change history
2 References p. 8
3 Definitions, symbols and abbreviations p. 8
4 Overview of CAT service requirements in the 3GPP CS domain p. 9
5 Architectural aspects p. 12
5.1 Architectural requirements p. 12
5.2 Reference model p. 12
5.2.1 Logical network architecture p. 12
5.2.1.1 (G)MSC Server switch architecture p. 12
5.2.1.2 CAT Server switch architecture p. 13
5.2.1.3 (G)MSC Server bridge architecture p. 14
5.2.1.4 CAT Server switch architecture with routing back to GMSC Server p. 15
5.2.1.5 (G)MSC Server switch architecture use based on UE capabilities p. 16
5.2.1.6 Terminating MSC Server switch architecture p. 18
5.3 Functional Entities p. 19
5.4 Interfaces p. 20
5.4.1 Cc Interface p. 20
5.4.1.1 BICC based Cc interface p. 20
5.4.1.2 SIP-I based Cc interface p. 21
5.4.1.3 ISUP based Cc interface p. 21
5.4.2 Cb Interface p. 21
6 CAT service provisioning, activation & deactivation, configuration p. 22
7 CAT call flows p. 25
7.1 Alternative 1 - (G)MSC Server switch architecture p. 25
7.1.1 Triggering methods p. 25
7.1.2 Trigger points in the call p. 25
7.1.3 Nominal call flows p. 25
7.1.3.1 Speech call p. 25
7.1.3.2 Multimedia call p. 27
7.1.4 Abnormal call flows p. 30
7.1.5 Fallback call flows p. 30
7.2 Alternative 2 - CAT Server switch architecture p. 30
7.2.1 Triggering methods p. 30
7.2.2 Trigger points in the call p. 30
7.2.3 Nominal call flows p. 31
7.2.3.1 Speech call p. 31
7.2.3.2 Multimedia call p. 32
7.2.4 Abnormal call flows p. 34
7.2.5 Fallback call flows p. 34
7.3 Alternative 3 - CAT Server switch architecture with routing back to GMSC Server p. 34
7.3.1 Triggering methods p. 34
7.3.2 Trigger points in the call p. 35
7.3.3 Nominal call flows p. 35
7.3.3.1 Speech call p. 35
7.3.3.2 Multimedia call p. 35
7.3.4 Abnormal call flows p. 38
7.3.5 Fallback call flows p. 38
7.4 Alternative 4 - (G)MSC Server switch architecture use based on UE capabilities p. 39
7.4.1 Triggering methods p. 39
7.4.2 Trigger points in the call p. 39
7.4.3 Nominal call flows p. 39
7.4.3.1 Speech call p. 39
7.4.3.2 Multimedia call p. 40
7.4.4 Abnormal call flows p. 60
7.4.5 Fallback call flows p. 60
7.5 Alternative 5 -Terminating MSC Server switch architecture p. 61
7.5.1 Triggering methods p. 61
7.5.2 Trigger points in the call p. 61
7.5.3 Nominal call flows p. 61
7.5.3.1 Speech call p. 61
7.5.3.2 Multimedia call p. 63
7.5.4 Abnormal call flows p. 65
7.5.5 Fallback call flows p. 65
7.6 Alternative 6 - (G)MSC Server bridge architecture p. 65
7.6.1 Triggering methods p. 65
7.6.2 Trigger points in the call p. 65
7.6.3 Nominal call flows p. 65
7.6.3.1 Speech call p. 65
7.6.3.2 Multimedia call p. 65
7.6.4 Abnormal call flows p. 68
7.6.5 Fallback call flows p. 68
8 Interaction with other features p. 69
8.1 Interaction with supplementary services p. 69
8.1.1 Line identification services p. 69
8.1.1.1 Calling Line Identification Presentation (CLIP) p. 69
8.1.1.2 Calling Line Identification Restriction (CLIR) p. 69
8.1.1.3 Connected Line Identification Presentation / Restriction (COLP/COLR) p. 69
8.1.2 Call forwarding services p. 70
8.1.2.1 General Principles p. 70
8.1.2.2 (G)MSC Server switch architecture p. 70
8.1.2.3 CAT Server switch architecture p. 74
8.1.2.4 (G)MSC Server bridge architecture p. 74
8.1.2.5 Terminating MSC Server switch architecture p. 76
8.1.2.5.1 Speech call p. 76
8.1.2.5.2 Multimedia call p. 78
8.1.2.6 CAT Server switch architecture with routing back to GMSC Server p. 82
8.1.2.6.1 Speech call p. 82
8.1.2.6.2 Multimedia call p. 82
8.1.2.7 (G)MSC server switch architecture use based on UE capabilities p. 87
8.1.2.7.1 Speech call p. 87
8.1.2.7.2 Multimedia call p. 87
8.1.3 Call waiting p. 99
8.1.3.1 Basic interactions p. 99
8.1.3.2 'Call waiting' CAT p. 99
8.1.4 Call Hold p. 99
8.1.4.1 Basic interactions p. 99
8.1.4.2 'Call hold' CAT p. 99
8.1.5 Multiparty p. 99
8.1.6 Explicit Call Transfer p. 100
8.1.7 Call barring p. 100
8.1.7.1 Barring of all Incoming Calls (BAIC) p. 100
8.1.7.2 Barring of all Incoming Calls when Roaming Outside the HPLMN Country (BICroam) p. 100
8.1.7.3 Barring of all Outgoing Calls (BAOC) p. 100
8.1.7.4 Barring of Outgoing International Calls (BOIC) p. 100
8.1.7.5 Barring of Outgoing International Calls except to HPLMN Country (BOICexHC) p. 100
8.1.8 Closed user group p. 100
8.1.9 User to User signalling p. 101
8.1.10 Advice of charge p. 101
8.1.11 Voice group call service (VGCS), Voice broadcast service (VBS) p. 101
8.2 Interaction with other services and functions p. 101
8.2.1 CAMEL services p. 101
8.2.2 Lawful Interception p. 101
8.2.3 Operator determined barring p. 101
8.2.4 Unstructured Supplementary Service Data (USSD) p. 101
8.2.5 Carrier selection p. 101
8.2.6 DTMF p. 102
8.2.7 Optimal routeing p. 102
8.2.8 SCUDIF p. 102
8.2.9 TFO / TrFO p. 102
8.3 Interaction with charging p. 102
8.4 Interaction with H.245 and MONA call setup time p. 103
9 Interworking with other networks p. 104
10 Technical analysis &architectures assessment p. 105
10.1 General technical considerations p. 105
10.2 Comparison of the different alternatives p. 107
10.2.1 Technical impacts p. 107
10.2.2 Pros & cons p. 109
11 Conclusions and recommendations p. 111
11.1 Feasibility & Limits of CAT services in the CS domain p. 111
11.2 Preferred solution(s) p. 111
11.2.1 Audio CAT p. 111
11.2.2 Multimedia CAT p. 112
11.2.3 Signalling of calling UE's CAT capability to the GMSC p. 112
11.3 Way forward p. 112
A Impacts to Existing Specifications p. 113
$ Change history p. 114
