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back to TS 23.172

Table of Contents for  TS 23.172  Word version:  19.0.0

1Scope  p. 6
2References  p. 6
3Definitions and abbreviations  p. 7
3.1Definitions  p. 7
3.2Abbreviations  p. 7
4Service change and fallback for UDI/RDI multimedia  p. 7
4.1General Requirements  p. 7
4.2Access Call Control Signalling  p. 8
4.2.1Mobile originating side - initiation of call setup  p. 8
4.2.1.1Subscription checking  p. 9
4.2.1.1.1Send Info For Outgoing Call  p. 9
4.2.1.1.2Complete Call  p. 10
4.2.2Mobile terminating side  p. 10
4.2.2.1Subscription checking  p. 11
4.2.2.1.1Send Info For Incoming Call  p. 11
4.2.2.1.2Complete Call  p. 12
4.2.3Mobile originating side - completion of call setup  p. 12
4.2.4User-initiated Service change in the active state  p. 13
4.2.5Network-initiated Service change in the active state |R6|  p. 14
4.2.5.1Network-initiated Service change in the active state starting with multimedia in Iu mode  p. 16
4.2.5.2Network-initiated Service change in the active state starting with speech in Iu mode  p. 17
4.3Core Network procedures  p. 22
4.3.1Multimedia codec  p. 23
4.3.2Originating side - initiation of call setup  p. 23
4.3.2.1Originating MSC Handling |R6|  p. 23
4.3.2.2VMSC Handling at Originating Side |R6|  p. 24
4.3.3Terminating side  p. 24
4.3.3.1HLR Interrogation  p. 24
4.3.3.1.1Send Routing Info  p. 25
4.3.3.1.2Send Routing Info Ack  p. 25
4.3.3.1.3Handling of mobile terminating calls in the HLR  p. 26
4.3.3.1.4Handling of mobile terminating calls in the GMSC  p. 33
4.3.3.1aGMSC Handling at Terminating Side |R6|  p. 36
4.3.3.2Terminating MSC Handling  p. 36
4.3.4Originating side - completion of call setup  p. 39
4.3.5Service change during the active state  p. 40
4.3.5.1Mid-Call Codec Modification Procedure For Service Change  p. 41
4.3.5.2Unsuccessful Service Change  p. 51
4.3.6Interaction with supplementary services  p. 55
4.3.6.1Call forwarding and Call deflection  p. 55
4.3.6.2Closed User Group (CUG)  p. 56
4.3.6.3Call barring  p. 56
4.3.7Interactions with CAMEL  p. 56
4.3.7.1Interaction at call setup  p. 56
4.3.7.2Interaction at call answer  p. 56
4.3.7.3Interaction with Call Party Handling  p. 56
4.3.7.4Interaction with CAMEL in-band information and user interaction  p. 57
4.3.7.5Interaction during service change |R6|  p. 57
4.3.8Interworking with external networks  p. 57
4.3.9User interaction and in-band information  p. 57
5Lawful Interception  p. 58
$Change history  p. 59