ETSI TS 124 294 V9.1.0 (2010-04)

Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS) Centralized Services (ICS) protocol via I1 interface (3GPP TS 24.294 version 9.1.0 Release 9)

RTS/TSGC-0124294v910

General Information

• Status: Published
• Publication Date: 08-Apr-2010
• Technical Committee: 3GPP CT 1 - MM/CC/SM [lu] (formely CN1)
• Current Stage: 12 - Completion
• Due Date: 15-Apr-2010
• Completion Date: 09-Apr-2010

Standards Content (Sample)

ETSI TS 124 294 V9.1.0 (2010-04)
Technical Specification

Digital cellular telecommunications system (Phase 2+);
Universal Mobile Telecommunications System (UMTS);
LTE;
IP Multimedia Subsystem (IMS) Centralized Services (ICS)
protocol via I1 interface
(3GPP TS 24.294 version 9.1.0 Release 9)

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3GPP TS 24.294 version 9.1.0 Release 9 1 ETSI TS 124 294 V9.1.0 (2010-04)



Reference
RTS/TSGC-0124294v910
Keywords
GSM, LTE, UMTS
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© European Telecommunications Standards Institute 2010.
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ETSI

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3GPP TS 24.294 version 9.1.0 Release 9 2 ETSI TS 124 294 V9.1.0 (2010-04)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
http://webapp.etsi.org/key/queryform.asp.
ETSI

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3GPP TS 24.294 version 9.1.0 Release 9 3 ETSI TS 124 294 V9.1.0 (2010-04)
Contents
Intellectual Property Rights . 2
Foreword . 2
Foreword . 7
1 Scope . 8
2 References . 8
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 9
4 General description. 9
4.1 General . 9
4.2 Structure of the protocol . 10
4.2.1 Introduction. 10
4.2.2 Application level protocol . 10
4.2.3 Transport level protocols . 10
4.2.3.1 General . 10
4.2.3.2 USSD as transport level protocol . 10
5 Functional entities . 11
5.1 User Equipment (UE) . 11
5.2 Application Server (AS) . 11
6 Communication between ICS UE and SCC AS via I1 interface . 11
6.1 Introduction . 11
6.2 Session control procedures . 11
6.2.1 Session setup . 11
6.2.1.1 General . 11
6.2.1.2 Detailed behaviour of ICS UE . 12
6.2.1.2.1 ICS UE CS Session Origination . 12
6.2.1.2.2 ICS UE CS Session Termination without UE assisted T-ADS . 14
6.2.1.2.3 ICS UE CS Session Termination with UE assisted T-ADS . 15
6.2.1.2.4 Failure . 15
6.2.1.3 Detailed behaviour of SCC AS . 16
6.2.1.3.1 SCC AS CS Session Origination . 16
6.2.1.3.2 SCC AS CS Session Termination without ICS UE assisted T-ADS . 17
6.2.1.3.3 SCC AS CS Session Termination with ICS UE assisted T-ADS . 19
6.2.1.3.4 Failure . 19
6.2.2 Void . 19
6.2.3 Session release . 19
6.2.3.1 General . 19
6.2.3.2 Detailed behaviour of ICS UE . 20
6.2.3.3 Detailed behaviour of SCC AS . 21
6.2.3.3.1 Sending I1 BYE to UE . 21
6.2.3.3.2 Receipt I1 Success from UE . 21
6.2.3.3.3 Receipt I1 BYE from UE. 21
6.2.4 Adding I1 control to existing CS session (I1 Augmentation) . 21
6.2.4.1 General . 21
6.2.4.2 Detailed behaviour of ICS UE . 22
6.2.4.3 Detailed behaviour of SCC AS . 22
6.2.5 Service control transfer (Gm fallback to I1) . 22
6.2.5.1 General . 22
6.2.5.2 Service continuity while retaining the use of CS access for media . 23
6.2.5.2.1 Detailed behaviour of ICS UE . 23
6.2.5.2.2 Detailed behaviour of SCC AS . 23
6.2.5.3 Service continuity when transferring from PS access to CS access . 24
ETSI

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3GPP TS 24.294 version 9.1.0 Release 9 4 ETSI TS 124 294 V9.1.0 (2010-04)
6.2.5.3.1 Detailed behaviour of UE . 25
6.2.5.3.2 Detailed behaviour of SCC AS . 25
6.3 Supplementary services control procedures . 26
6.3.1 Line ID Services (OIP, OIR, TIP, TIR) . 26
6.3.1.1 Originating Identity Presentation (OIP) . 26
6.3.1.2 Originating Identity Restriction (OIR) . 26
6.3.1.3 Terminating Identity Presentation (TIP) . 27
6.3.1.4 Terminating Identity Restriction (TIP). 27
6.3.2 Communication diversion services (CDIV) . 27
6.3.2.1 Communication Forwarding Unconditional (CFU) . 27
6.3.2.2 Communication Forwarding on Not Logged-in (CFNL) . 27
6.3.2.3 Communication Forwarding Busy (CFB) . 27
6.3.2.4 Communication Forwarding No Reply (CFNR) . 27
6.3.2.5 Communication Forwarding on Subscriber Not Reachable (CFNRc) . 27
6.3.2.6 Communication Deflection (CD) . 28
6.3.2.7 Communication Diversion Notification (CDIVN) . 28
6.3.4 Communication Hold (HOLD)/Resume . 28
6.3.4.1 Actions at the ICS UE . 28
6.3.4.2 Actions at the SCC AS . 29
6.3.5 Consultative Explicit Communication Transfer. 29
6.3.5.1 Actions at the ICS UE . 29
6.3.5.2 Actions at the SCC AS . 29
6.3.6 Conference calling (CONF) . 30
6.3.6.1 Actions at the ICS UE . 30
6.3.6.2 Actions at the SCC AS . 30
6.3.7 Communication Waiting . 30
6.4 SCC AS and ICS UE Time Synchronization . 30
6.4.1 General . 30
6.4.2 Generating Time . 31
6.4.3 Detailed behaviour of ICS UE . 31
6.4.3.1 ICS UE Synchronization Origination . 31
6.4.4 Detailed behaviour of SCC AS . 31
6.4.4.1 SCC AS Synchronization Termination . 31
7 Protocol specification and implementation . 32
7.1 Overview of I1 protocol functionality . 32
7.2 I1-protocol messages and functional definition . 33
7.2.1 I1-protocol messages . 33
7.2.1.1 General . 33
7.2.1.2 Session establishment messages . 34
7.2.1.3 Stable session messages . 34
7.2.1.4 Session clearing messages . 35
7.2.1.5 Error messages . 35
7.2.1.6 Supplementary Services Invocation related messages . 35
7.2.1.7 Other messages . 35
7.2.2 I1 message structure and common field encoding . 35
7.2.2.1 General . 35
7.2.2.1.1 Message Header structure . 35
7.2.2.1.2 Protocol Version information . 36
7.2.2.1.3 Message Type and Reason . 36
7.2.2.1.4 Call Identifier . 36
7.2.2.1.5 Sequence-ID . 36
7.3 Messages . 37
7.3.1 General Messages . 37
7.3.2 I1 INVITE – ICS UE initiated . 37
7.3.2.1 General . 37
7.3.2.2 Message Type . 38
7.3.2.3 To . 38
7.3.2.4 From . 38
7.3.2.5 Accept Contact . 38
7.3.2.6 ERAccept Contact . 38
7.3.2.7 Reject Contact . 38
ETSI

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3GPP TS 24.294 version 9.1.0 Release 9 5 ETSI TS 124 294 V9.1.0 (2010-04)
7.3.2.8 Timestamp . 38
7.3.3 INVITE – SCC AS initiated . 38
7.3.3.1 General . 38
7.3.3.2 Message Type . 39
7.3.3.3 From . 39
7.3.3.4 To . 39
7.3.3.5 SCC AS PSI DN . 39
7.3.3.6 Timestamp . 39
7.3.4 BYE – ICS UE initiated . 39
7.3.4.1 General . 39
7.3.4.2 Message Type . 40
7.3.5 BYE – SCC AS initiated . 40
7.3.5.1 General . 40
7.3.5.2 Message Type . 40
7.3.6 I1 PROGRESS – ICS UE initiated . 40
7.3.6.1 General . 40
7.3.6.2 Message Type . 41
7.3.7 I1 PROGRESS – SCC AS initiated . 41
7.3.7.1 General . 41
7.3.7.2 Message Type . 41
7.3.8 I1 FAILURE . 41
7.3.8.1 General . 41
7.3.8.2 Message Type . 42
7.3.8.3 To . 42
7.3.8.4 Reason Phrase . 42
7.4 I1 information elements and functional definition . 42
7.4.1 I1 information elements . 42
7.4.2 I1 Information elements encoding . 44
7.4.2.1 General . 44
7.4.2.2 Error-code . 45
7.4.2.3 Identity Information . 45
7.4.2.4 Privacy . 46
7.4.2.5 SCC-AS-id . 47
7.4.2.6 Session-identifier . 49
7.4.2.7 Void. 50
7.4.2.8 Replaces . 50
7.4.2.9 Accept Contact . 51
7.4.2.10 ERAccept Contact . 52
7.4.2.11 Reject Contact . 53
7.4.2.12 Mid-Call . 55
7.4.2.13 Reason-Phrase . 55
7.4.2.14 Time Stamp . 55
7.5 Session states and Session control procedures . 56
7.5.1 General . 56
7.5.2 Session states . 56
7.5.2.1 Session originated by the ICS UE . 56
7.5.2.1.1 Session states at ICS UE – ICS UE originated call . 56
7.5.2.1.2 Session states at SCC AS – ICS UE originated call . 56
7.5.2.2 Session terminated at the ICS UE . 57
7.5.2.2.1 Session states at UE – ICS UE terminated call . 57
7.5.2.2.2 Session states at SCC AS – ICS UE terminated session . 57
7.5.2.3 Session release .
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