Content for TS 24.294 Word version: 18.0.0
7 Protocol specification and implementation
7.1 Overview of I1 protocol functionality
7.2 I1-protocol messages and functional definition
7.3 Messages
7.4 I1 information elements and functional definition
7.5 Session states and Session control procedures
A Data structure associating keys with values
A.1 General
A.2 Associating keys with values
$ Change history
7 Protocol specification and implementation p. 44
7.1 Overview of I1 protocol functionality p. 44
7.2 I1-protocol messages and functional definition p. 45
7.2.1 I1-protocol messages p. 45
7.2.1.1 General p. 45
7.2.1.2 Session establishment messages p. 46
7.2.1.3 Stable session messages p. 47
7.2.1.4 Session clearing messages p. 47
7.2.1.5 Error messages p. 47
7.2.1.6 Supplementary Services Invocation related messages p. 47
7.2.1.7 Other messages p. 47
7.2.2 I1 message structure and common field encoding p. 48
7.3 Messages p. 49
7.3.1 General Messages p. 49
7.3.2 I1 INVITE - ICS UE initiated p. 50
7.3.2.1 General p. 50
7.3.2.2 Message Type p. 50
7.3.2.3 To-id p. 50
7.3.2.4 From-id p. 50
7.3.2.5 Accept Contact p. 50
7.3.2.6 ERAccept Contact p. 50
7.3.2.7 Reject Contact p. 51
7.3.2.8 Timestamp p. 51
7.3.3 INVITE - SCC AS initiated p. 51
7.3.3.1 General p. 51
7.3.3.2 Message Type p. 51
7.3.3.3 From-id p. 51
7.3.3.4 To-id p. 51
7.3.3.5 SCC AS PSI DN p. 52
7.3.3.6 Timestamp p. 52
7.3.3.7 Conference-id p. 52
7.3.4 BYE - ICS UE initiated p. 52
7.3.4.1 General p. 52
7.3.4.2 Message Type p. 52
7.3.5 BYE - SCC AS initiated p. 52
7.3.5.1 General p. 52
7.3.5.2 Message Type p. 53
7.3.6 I1 PROGRESS - ICS UE initiated p. 53
7.3.6.1 General p. 53
7.3.6.2 Message Type p. 53
7.3.7 I1 PROGRESS - SCC AS initiated p. 53
7.3.8 I1 FAILURE p. 54
7.3.9 REFER - UE initiated p. 55
7.4 I1 information elements and functional definition p. 56
7.4.1 I1 information elements p. 56
7.4.2 I1 Information elements encoding p. 58
7.4.2.1 General p. 58
7.4.2.2 Void
7.4.2.3 From-id Information p. 59
7.4.2.3A To-id Information p. 60
7.4.2.4 Privacy p. 62
7.4.2.5 SCC-AS-id p. 63
7.4.2.6 Session-identifier p. 64
7.4.2.7 Void
7.4.2.8 Replaces p. 65
7.4.2.9 Accept Contact p. 66
7.4.2.10 ERAccept Contact p. 68
7.4.2.11 Reject Contact p. 69
7.4.2.12 Mid-Call p. 70
7.4.2.13 Reason-Phrase p. 72
7.4.2.14 Time Stamp p. 72
7.4.2.15 Refer-to p. 73
7.4.2.16 Conference-id p. 74
7.5 Session states and Session control procedures p. 75
7.5.1 General p. 75
7.5.2 Session states p. 75
7.5.2.1 Session originated by the ICS UE p. 75
7.5.2.1.1 Session states at ICS UE - ICS UE originated call p. 75
7.5.2.1.2 Session states at SCC AS - ICS UE originated call p. 76
7.5.2.2 Session terminated at the ICS UE p. 76
7.5.2.2.1 Session states at UE - ICS UE terminated call p. 76
7.5.2.2.2 Session states at SCC AS - ICS UE terminated session p. 76
7.5.2.3 Session release p. 77
7.5.3 Session control procedures p. 77
7.5.3.1 General p. 77
7.5.3.2 Session establishment p. 77
7.5.3.2.1 UE-originating case p. 77
7.5.3.2.1.1 Procedure at ICS UE p. 77
7.5.3.2.1.2 Procedure at SCC AS p. 79
7.5.3.2.2 UE-terminating case p. 80
7.5.3.3 I1 service control signalling release p. 82
7.5.3.3.1 Initiating release of I1 service control signalling p. 82
7.5.3.3.2 Responding to release of I1 service control signalling p. 82
7.5.3.4 Receipt of a transport protocol error p. 82
7.5.3.4.1 USSD Transport p. 82
A (Normative) Data structure associating keys with values p. 83
A.1 General p. 83
A.2 Associating keys with values p. 83
$ Change history p. 84
