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TECHNICAL SPECIFICATION
Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS);
LTE;
IP Multimedia (IM) Subsystem Cx and Dx Interfaces;
Signalling flows and message contents
(3GPP TS 29.228 version 15.0.0 Release 15)
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3GPP TS 29.228 version 15.0.0 Release 15 1 ETSI TS 129 228 V15.0.0 (2018-07)
Reference
RTS/TSGC-0429228vf00
Keywords
GSM,LTE,UMTS
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3GPP TS 29.228 version 15.0.0 Release 15 2 ETSI TS 129 228 V15.0.0 (2018-07)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables 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 (https://ipr.etsi.org/).
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.
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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
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 29.228 version 15.0.0 Release 15 3 ETSI TS 129 228 V15.0.0 (2018-07)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 7
1 Scope . 8
2 References . 8
3 Definitions, symbols and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 10
4 Main Concept . 10
5 General Architecture . 11
5.1 Functional requirements of network entities . 11
5.1.1 Functional requirements of P-CSCF . 11
5.1.2 Functional requirements of I-CSCF . 11
5.1.3 Functional requirements of S-CSCF . 11
5.1.4 Functional requirements of HSS . 11
5.1.5 Functional classification of Cx interface procedures . 11
5.1.6 Functional Requirements of the Presentity Presence Proxy . 11
6 Procedure Descriptions. 11
6.1 Location management procedures . 12
6.1.1 User registration status query. 12
6.1.1.1 Detailed behaviour . 13
6.1.2 S-CSCF registration/deregistration notification . 15
6.1.2.1 Detailed behaviour . 21
6.1.3 Network initiated de-registration by the HSS, administrative . 26
6.1.3.1 Detailed behaviour . 27
6.1.4 User location query . 29
6.1.4.1 Detailed behaviour . 30
6.2 User data handling procedures . 31
6.2.1 User Profile download . 31
6.2.2 HSS initiated update of User Information . 31
6.2.2.1 Detailed behaviour . 33
6.3 Authentication procedures . 33
6.3.1 Detailed behaviour . 37
6.4 User identity to HSS resolution . 38
6.5 Implicit registration . 39
6.5.1 S-CSCF initiated procedures. 39
6.5.1.1 Registration . 39
6.5.1.2 De-registration . 39
6.5.1.3 Authentication . 39
6.5.1.4 Downloading the user profile . 39
6.5.1.5 Initiation of a session to a non-registered user . 39
6.5.2 HSS initiated procedures . 39
6.5.2.1 Update of User Profile . 39
6.5.2.2 De-registration . 40
6.5.2.3 Update of the Charging information . 40
6.5.2.4 Update of the SIP Digest Authentication Data . 40
6.5.2.5 Update of the Allowed WAF and/or WWSF Identities . 40
6.6 Download of the Relevant User Profile and Charging Information and Allowed WAF and/or WWSF
Identities . 40
6.6.1 HSS initiated update of User Profile . 41
6.6.2 S-CSCF operation . 41
6.7 S-CSCF Assignment. 41
ETSI
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3GPP TS 29.228 version 15.0.0 Release 15 4 ETSI TS 129 228 V15.0.0 (2018-07)
7 Information element contents . 44
7.1 Visited Network Identifier . 44
7.2 Public User Identity . 44
7.2a Public Service Identity . 44
7.2b Wildcarded Public Identity . 44
7.2c Void . 44
7.3 Private User Identity . 44
7.3a Private Service Identity . 44
7.4 S-CSCF Name . 44
7.4a AS Name . 44
7.5 S-CSCF Capabilities. 44
7.6 Result . 44
7.7 User Profile . 45
7.8 Server Assignment Type . 45
7.9 Authentication Data . 45
7.9.1 Item Number . 45
7.9.2 Authentication Scheme . 45
7.9.3 Authentication Information . 45
7.9.4 Authorization Information . 45
7.9.5 Confidentiality Key. 45
7.9.6 Integrity Key . 45
7.9.7 Authentication Context . 45
7.9.8 Digest Authenticate. 45
7.9.8.1 Digest Realm . 46
7.9.8.2 Void. 46
7.9.8.3 Digest Algorithm . 46
7.9.8.4 Digest QoP . 46
7.9.8.5 Digest HA1 . 46
7.9.9 Line Identifier . 46
7.9.10 Framed IP Address. 46
7.9.11 Framed IPv6 Prefix . 46
7.9.12 Framed Interface Id . 46
7.9.8.1 Digest Realm . 46
7.9.8.2 Void. 46
7.9.8.3 Digest Algorithm . 46
7.9.8.4 Digest QoP . 46
7.9.8.5 Digest HA1 . 46
7.9.9 Line Identifier . 46
7.10 Number Authentication Items . 47
7.11 Reason for de-registration . 47
7.12 Charging information . 47
7.13 Routing information . 47
7.14 Type of authorization . 47
7.15 Void . 47
7.16 User Data Already Available. 47
7.17 Associated Private Identities . 47
7.18 Originating-Request . 47
7.19 User Authorization Request Flags . 47
7.20 Loose-Route Indication . 47
7.21 S-CSCF Restoration Information . 47
7.22 Associated Registered Private Identities . 48
7.23 Multiple Registration Indication . 48
7.24 Session-Priority . 48
7.25 Identities with Emergency Registration . 48
7.26 Priviledged-Sender Indication . 48
7.27 LIA Flags. 48
7.28 Server Assignment Request Flags . 48
7.29 Allowed WAF and/or WWSF Identities . 48
8 Error handling procedures . 48
8.1 Registration error cases . 48
8.1.1 Cancellation of the old S-CSCF . 48
ETSI
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3GPP TS 29.228 version 15.0.0 Release 15 5 ETSI TS 129 228 V15.0.0 (2018-07)
8.1.2 Error in S-CSCF name . 49
8.1.3 Error in S-CSCF assignment type . 49
9 Protocol version identification . 49
10 Operational Aspects . 49
Annex A (normative): Mapping of Cx operations and terminology to Diameter . 50
A.1 Introduction . 50
A.2 Cx message to Diameter command mapping . 50
A.3 Cx message parameters to Diameter AVP mapping . 50
A.4 Message flows . 51
A.4.1 Registration– user not registered . 52
A.4.2 Registration – user currently registered . 53
A.4.3 UE initiated de-registration . 53
A.4.4 Network initiated de-registration . 54
A.4.4.1 Registration timeout . 54
A.4.4.2 Administrative de-registration . 54
A.4.4.3 De-registration initiated by service platform . 55
A.4.5 UE Terminating SIP session set-up . 55
A.4.6 Initiation of a session to a non-registered user . 56
A.4.6a AS originating session on behalf of a non-registered user . 56
A.4.7 User Profile update . 57
Annex B (informative): User profile UML model . 58
B.1 General description. 58
B.2 Service profile . 58
B.2.1 Public Identification . 59
B.2.1A Core Network Service Authorization . 61
B.2.2 Initial Filter Criteria. 61
B.2.3 Service Point Trigger . 63
Annex C (informative): Conjunctive and Disjunctive Normal Form . 65
Annex D (informative): High-level format for the User Profile . 68
Annex E (normative): XML schema for the Cx interface user profile. 69
Annex F (normative): Definition of parameters for service point trigger matching . 74
Annex G (normative): Emergency registrations . 75
Annex H (normative): Diameter overload control mechanism . 76
H.1 General . 76
H.2 HSS behaviour . 76
H.3 I/S-CSCF behaviour . 76
Annex I (Informative): Diameter overload node behaviour . 77
I.1 Message prioritization . 77
Annex J (normative): Diameter message priority mechanism . 78
J.1 General . 78
J.2 Cx/Dx interfaces . 78
J.2.1 General .
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