ETSI TS 124 302 V12.12.0 (2019-01)

Universal Mobile Telecommunications System (UMTS); LTE; Access to the 3GPP Evolved Packet Core (EPC) via non-3GPP access networks; Stage 3 (3GPP TS 24.302 version 12.12.0 Release 12)

RTS/TSGC-0124302vcc0

General Information

• Status: Published
• Publication Date: 10-Jan-2019
• Technical Committee: 3GPP CT 1 - MM/CC/SM [lu] (formely CN1)
• Current Stage: 12 - Completion
• Completion Date: 11-Jan-2019

Standards Content (Sample)

TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
Access to the 3GPP Evolved Packet Core (EPC)
via non-3GPP access networks;
Stage 3
(3GPP TS 24.302 version 12.12.0 Release 12)

3GPP TS 24.302 version 12.12.0 Release 12 1 ETSI TS 124 302 V12.12.0 (2019-01)

Reference
RTS/TSGC-0124302vcc0
Keywords
LTE,UMTS
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ETSI
3GPP TS 24.302 version 12.12.0 Release 12 2 ETSI TS 124 302 V12.12.0 (2019-01)
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
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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
http://webapp.etsi.org/key/queryform.asp.
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.
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Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 9
1 Scope . 10
2 References . 10
3 Definitions, symbols and abbreviations . 13
3.1 Definitions . 13
3.2 Abbreviations . 15
4 General . 16
4.1 Trusted and untrusted accesses . 16 ®
4.2 cdma2000 HRPD Access System . 17
4.3 WiMAX Access System . 17
4.4 Identities . 17
4.4.1 User identities . 17
4.4.2 Identification of IP Services/PDN connections. 17
4.4.3 FQDN for ePDG Selection . 17
4.4.4 Access Network Identity . 17
4.4.5 ANDSF Server Name . 18
4.4.6 Home Agent address(es) . 18
4.4.7 Security Parameters Index . 18
4.5 Fixed Broadband Access System . 18
4.6 Restrictive non-3GPP access networks . 18
5 Network Discovery and Selection . 18
5.1 Access network discovery and selection procedures . 18
5.1.1 General . 18
5.1.2 Access network discovery procedure . 19
5.1.2.1 Triggering the discovery of operator preferred access networks with the ANDSF . 19
5.1.2.2 Discovering availability of access networks . 19
5.1.3 Access network selection procedure . 19
5.1.3.1 General . 19
5.1.3.2 Specific intra-technology access network selection . 19 ®
5.1.3.2.1 cdma2000 HRPD access network selection . 19
5.1.3.2.2 WiMAX NAP selection . 19
5.1.3.2.3 WLAN selection . 19
5.1.3.2.3.1 General . 19
5.2 EPC network selection . 21
5.2.1 General . 21
5.2.2 Generic EPC network selection procedure . 21
5.2.2.1 Identification of the EPC . 21
5.2.2.2 Selection at switch-on or recovery from lack of coverage . 21
5.2.2.2.1 UE selection modes . 21
5.2.2.2.2 Manual EPC network selection . 22
5.2.2.2.3 Automatic EPC network selection . 22
5.2.3 Access technology specific EPC network selection procedures . 22
5.2.3.1 EPC network selection procedures for WiMAX . 22
5.2.3.1.1 Identification of the EPC by the WiMAX access network . 22
5.2.3.1.2 Selection at switch-on or recovery from lack of coverage. 22
5.2.3.2 EPC network selection procedures for WLAN . 22
5.2.3.2.1 UE selection modes . 22
5.2.3.2.1A Service provider solicitation . 23
5.2.3.2.2 Manual Service Provider selection mode procedure . 23
5.2.3.2.3 Automatic mode service provider selection procedure . 23
5.3 Access Network reselection . 25
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5.3.1 General . 25
5.3.2 UE procedures . 25
5.3.3 EPC procedures . 25
5.3.4 Periodic EPC network reselection attempts . 25
5.4 Data traffic routing of IP flows . 26
5.4.1 General . 26
5.4.2 Access technology or access network selection . 26
5.4.2.1 ANDSF rules control the WLAN access selection and traffic routing . 26
5.4.2.2 RAN rules control the WLAN access selection and traffic routing . 27
6 UE – EPC Network protocols . 27
6.1 General . 27
6.2 Trusted and Untrusted Accesses . 27
6.2.1 General . 27
6.2.2 Pre-configured policies in the UE . 27
6.2.3 Dynamic Indication. 27
6.2.4 No trust relationship information . 27
6.3 IP Mobility Mode Selection . 28
6.3.1 General . 28
6.3.2 Static configuration of inter-access mobility mechanism . 28
6.3.3 Dynamic configuration of inter-access mobility mechanism . 28
6.3.3.0 General . 28
6.3.3.1 IPMS indication . 28
6.3.3.1.1 IPMS indication from UE to 3GPP AAA server . 28
6.3.3.1.2 IPMS indication from 3GPP AAA server to UE . 29
6.4 Authentication and authorization for accessing EPC via a trusted non-3GPP access network . 29
6.4.1 General . 29
6.4.1A TWAN connection modes . 30
6.4.2 UE procedures . 30
6.4.2.1 Identity Management . 30
6.4.2.2 EAP-AKA and EAP-AKA' based Authentication . 30
6.4.2.3 Full Authentication and Fast Re-authentication . 30
6.4.2.4 Handling of the Access Network Identity . 31
6.4.2.4.1 General . 31
6.4.2.4.2 ANID indication from 3GPP AAA server to UE . 31
6.4.2.4.3 UE check of ANID for HRPD CDMA 2000® access networks . 31
6.4.2.4.4 UE check of ANID for WiMAX access networks . 31
6.4.2.4.5 UE check of ANID for WLAN access networks . 31
6.4.2.4.6 UE check of ANID for ETHERNET access networks . 32
6.4.2.5 Full name for network and short name for network . 32
6.4.2.6 TWAN connection modes . 32
6.4.2.6.1 General . 32
6.4.2.6.2 Usage of single-connection mode (SCM) . 32
6.4.2.6.3 Usage of multi-connection mode (MCM) . 34
6.4.2.6.4 Network support not available . 35
6.4.3 3GPP AAA server procedures . 36
6.4.3.1 Identity Management . 36
6.4.3.2 EAP-AKA and EAP-AKA' based Authentication . 36
6.4.3.3 Full authentication and Fast Re-authentication . 36
6.4.3.4 Full name for network and short name for network . 36
6.4.3.5 TWAN connection modes . 36
6.4.3.5.1 General . 36
6.4.3.5.2 Usage of single-connection mode (SCM) . 37
6.4.3.5.3 Usage of multi-connection mode (MCM) . 38
6.4.3.5.4 Network support not available . 38
6.4.4 Multiple PDN support for trusted non-3GPP access . 39
6.5 Authentication and authorization for accessing EPC via an untrusted non-3GPP access network . 40
6.5.1 General . 40
6.5.2 Full authentication and authorization . 40
6.5.2.1 General . 40
6.5.2.2 UE procedures . 40
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6.5.2.2.1 General . 40
6.5.2.2.2 EAP AKA . 40
6.5.2.2.2.1 Identity management . 40
6.5.2.2.2.2 Protected result indications . 41
6.5.2.3 3GPP AAA server procedures. 41
6.5.2.3.1 General . 41
6.5.2.3.2 EAP-AKA . 41
6.5.2.3.2.1 Identity management . 41
6.5.2.3.2.2 EAP AKA based authentication . 41
6.5.2.3.2.3 Fast re-authentication . 41
6.5.2.3.2.4 Protected result indications . 41
6.5.2.4 ePDG procedures . 41
6.5.3 Multiple PDN support for untrusted non-3GPP access network . 42 ®
6.6 UE - 3GPP EPC (cdma2000 HRPD Access) . 42
6.6.1 General . 42
6.6.2 Non-emergency case . 43
6.6.2.1 General . 43
6.6.2.2 UE identities . 43 ®
6.6.2.3 cdma2000 HRPD access network identity . 43
6.6.2.4 PLMN system selection . 43
6.6.2.5 Trusted and untrusted accesses . 43
6.6.2.6 IP mobility mode selection . 43
6.6.2.7 Authentication and authorization for accessing EPC . 43
6.6.3 Emergency case . 44
6.6.3.1 General . 44
6.6.3.2 UE identities . 44
6.6.3.3 Authentication and authorization for accessing EPC . 44
6.7 UE - 3GPP EPC (WiMAX Access) . 44
6.7.1 General . 44
6.7.2 Non-emergency case . 44
6.7.2.1 General . 44
6.7.2.2 UE identities . 44
6.7.2.3 WiMAX access network identity . 44
6.7.2.4 Selection of the Network Service Provider . 45
6.7.2.5 Trusted and untrusted accesses . 45
6.7.2.6 IP mobility mode selection . 45
6.7.2.7 Authentication and authorization for accessing EPC . 45
6.7.3 Emergency case . 45
6.8 Communication over the S14 . 45
6.8.1 General . 45
6.8.2 Interaction with the Access Network Discovery and Selection Function . 46
6.8.2.1 General . 46
6.8.2.2 UE procedures . 46
6.8.2.2.1 UE discovering the ANDSF . 46
6.8.2.2.1A ANDSF communication security . 47
6.8.2.2.2 Role of UE for Push model. 47
6.8.2.2.3 Role of UE for Pull model . 47
6.8.2.2.4 UE using information provided by ANDSF . 48
6.8.2.2.4.1 General . 48
6.8.2.2.4.2 Use of Inter-system Mobility Policy . 49
6.8.2.2.4.3 Use of Access Network Discovery Information . 50
6.8.2.2.4.4 Use of Inter-System Routing Policies . 50
6.8.2.2.4.5 Use of Inter-APN Routing Policies . 51
6.8.2.2.4.6 Use of WLAN selection information . 52
6.8.2.3 ANDSF procedures . 52
6.8.2.3.1 General . 52
6.8.2.3.2 Role of ANDSF for Push model . 52
6.8.2.3.3 Role of ANDSF for Pull model . 52
6.9 Handling of Protocol Configuration Options information . 53
6.10 Integration with access stratum layer of 3GPP access . 53
6.10.1 General . 53
6.10.2 Selection of control of WLAN access selection and traffic routing . 53
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6.10.3 Additional procedures when WLAN access selection and traffic routing is controlled by ANDSF
rules . 54
6.10.4 Additional procedures when WLAN access selection and traffic routing is controlled by RAN rules . 55
7 Tunnel management procedures . 56
7.1 General . 56
7.2 UE procedures . 56
7.2.1 Selection of the ePDG. 56
7.2.2 Tunnel establishment . 57
7.2.3 Tunnel modificatio n . 59
7.2.4 Tunnel disconnection . 59
7.2.4.1 UE initiated disconnection . 59
7.2.4.2 UE behaviour towards ePDG initiated disconnection . 59
7.3 3GPP AAA server procedures . 59
7.4 ePDG procedures . 60
7.4.1 Tunnel establishment . 60
7.4.2 Tunnel modificatio n . 61
7.4.3 Tunnel disconnection . 61
7.4.3.1 ePDG initiated disconnection . 61
7.4.3.2 ePDG behaviour towards UE initiated disconnection . 62
8 PDUs and parameters specific to the present document . 62
8.0 General . 62
8.1 3GPP specific coding information defined within present document . 62
8.1.1 Access Network Identity format and coding . 62
8.1.1.1 Generic format of the Access Network Identity . 62
8.1.1.2 Definition of Access Network Identities for Specific Access Networks . 63
8.1.2 IKEv2 Notify Message Type value . 63
8.1.2.1 Generic . 63
8.1.2.2 Private Notify Message - Error Types . 64
8.1.3 ANDSF Push Information . 64
8.1.3.1 General . 64
8.1.3.2 ANDSF Push Information values . 64
8.1.4 PDUs for TWAN connection modes . 64
8.1.4.0 General . 64
8.1.4.1 Message . 64
8.1.4.2 Item . 65
8.1.4.3 CONNECTIVITY_TYPE item . 66
8.1.4.4 ATTACHMENT_TYPE item . 66
8.1.4.5 APN item . 66
8.1.4.6 PDN_TYPE item . 67
8.1.4.7 AUTHORIZATIONS item . 67
8.1.4.8 CONNECTION_MODE_CAPABILITY item . 67
8.1.4.9 PROTOCOL_CONFIGURATION_OPTIONS item . 68
8.1.4.10 CAUSE item . 68
8.1.4.10.1 General . 68
8.1.4.10.2 Causes . 69
8.1.4.11 IPV4_ADDRESS item . 70
8.1.4.12 IPV6_INTERFACE_IDENTIFIER item . 70
8.1.4.13 TWAG_CP_ADDRESS item . 70
8.1.4.14 TWAG_UP_MAC_ADDRESS item . 71
8.1.4.15 SUPPORTED_WLCP_TRANSPORTS item . 71
8.1.4.16 Tw1 item . 72
8.2 IETF RFC coding information defined within present document . 72
8.2.1 IPMS attributes . 72
8.2.1.1 AT_IPMS_IND attribute . 72
8.2.1.2 AT_IPMS_RES attribute . 72
8.2.2 Access Network Identity indication attribute . 73
8.2.2.1 Access Network Identity in the AT_KDF_INPUT attribute . 73
8.2.3 Trust relationship indication attribute . 73
8.2.3.1 AT_TRUST_IND attribute . 73
8.2.4 IKEv2 Configuration Payloads attributes . 74
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8.2.4.1 HOME_AGENT_ADDRESS attribute . 74
8.2.5 Full name for network and short name for network . 74
8.2.5.1 AT_FULL_NAME_FOR_NETWORK attribute . 74
8.2.5.2 AT_SHORT_NAME_FOR_NETWORK attribute . 75
8.2.6 Handling of the unknown protocol data . 75
8.2.7 Attributes for TWAN connection modes . 76
8.2.7.1 AT_TWAN_CONN_MODE attribute . 76
Annex A (informative): Example signalling flows for inter-system change between 3GPP and
non-3GPP systems using ANDSF . 77
A.1 Scope of signalling flows . 77
A.2 Signalling flow for inter-system change between 3GPP access network and non-3GPP access
network . 77
Annex B (informative): Assignment of Access Network Identities in 3GPP . 80
B.1 Access Network Identities . 80
Annex C (informative): Example usage of ANDSF . 81
C.1 Scope of ANDSF Example. 81
C.2 Organization of ANDSF Coverage Map for WiMAX Network discovery . 81
C.3 Parameters in Pull mode . 81
Annex D (informative): Mismatch of static configuration of mobility mechanism in the UE
and in the network . 82
Annex E (informative): UE procedures based on preconfigured and received information . 84
Annex F (Normative): Access to EPC via restrictive non-3GPP access network . 87
F.1 General . 87
F.2 UE – EPC network protocols . 87
F.2.1 General . 87
F.2.2 FTT protocol . 87
F.2
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