ETSI TS 124 302 V15.7.0 (2019-07)

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 15.7.0 Release 15)

RTS/TSGC-0124302vf70

General Information

• Status: Published
• Publication Date: 21-Jul-2019
• Technical Committee: 3GPP CT 1 - MM/CC/SM [lu] (formely CN1)
• Current Stage: 12 - Completion
• Completion Date: 22-Jul-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 15.7.0 Release 15)

3GPP TS 24.302 version 15.7.0 Release 15 1 ETSI TS 124 302 V15.7.0 (2019-07)

Reference
RTS/TSGC-0124302vf70
Keywords
LTE,UMTS
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ETSI
3GPP TS 24.302 version 15.7.0 Release 15 2 ETSI TS 124 302 V15.7.0 (2019-07)
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This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
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ETSI
3GPP TS 24.302 version 15.7.0 Release 15 3 ETSI TS 124 302 V15.7.0 (2019-07)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 11
1 Scope . 12
2 References . 12
3 Definitions, symbols and abbreviations . 15
3.1 Definitions . 15
3.2 Abbreviations . 18
4 General . 19
4.1 Trusted and untrusted accesses . 19 ®
4.2 cdma2000 HRPD Access System . 20
4.3 WiMAX Access System . 20
4.3A WLAN . 20
4.4 Identities . 20
4.4.1 User identities . 20
4.4.2 Identification of IP Services/PDN connections. 21
4.4.3 FQDN for ePDG Selection . 21
4.4.4 Access Network Identity . 21
4.4.5 ANDSF Server Name . 21
4.4.6 Home Agent address(es) . 21
4.4.7 Security Parameters Index . 22
4.5 Fixed Broadband Access System . 22
4.6 Restrictive non-3GPP access networks . 22
4.7 Provision and handling of local emergency numbers . 22
4.8 Quality of service support . 23
4.8.1 General . 23
4.8.2 QoS differentiation in trusted WLAN . 23
4.8.2.1 General . 23
4.8.2.2 QoS signalling . 23
4.8.2.3 QoS differentiation in user plane . 24
4.8.3 QoS differentiation in untrusted non-3GPP access . 24
5 Network Discovery and Selection . 24
5.0 General . 24
5.1 Access network discovery and selection procedures . 24
5.1.1 General . 24
5.1.2 Access network discovery procedure . 25
5.1.2.1 Triggering the discovery of operator preferred access networks with the ANDSF . 25
5.1.2.2 Discovering availability of access networks . 25
5.1.3 Access network selection procedure . 25
5.1.3.1 General . 25
5.1.3.2 Specific intra-technology access network selection . 25 ®
5.1.3.2.1 cdma2000 HRPD access network selection . 25
5.1.3.2.2 WiMAX NAP selection . 26
5.1.3.2.3 WLAN selection . 26
5.2 EPC network selection over non-3GPP access . 27
5.2.1 General . 27
5.2.2 Generic EPC network selection procedure over non-3GPP access . 28
5.2.2.1 Identification of the EPC . 28
5.2.2.2 EPC network selection . 28
5.2.2.2.1 UE selection modes . 28
5.2.2.2.2 Manual EPC network selection . 28
5.2.2.2.3 Automatic EPC network selection . 28
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5.2.3 Access technology specific EPC network selection procedures . 28
5.2.3.1 EPC network selection procedures for WiMAX . 28
5.2.3.1.1 Identification of the EPC by the WiMAX access network . 28
5.2.3.1.2 EPC network selection . 29
5.2.3.2 EPC network selection procedures for WLAN . 29
5.2.3.2.1 UE selection modes . 29
5.2.3.2.1A Service provider solicitation . 29
5.2.3.2.2 Manual Service Provider selection mode procedure . 30
5.2.3.2.3 Automatic mode service provider selection procedure . 30
5.3 Access Network reselection . 31
5.3.1 General . 31
5.3.2 UE procedures . 31
5.3.3 EPC procedures . 32
5.3.4 Periodic EPC network reselection attempts . 32
5.4 Data traffic routing of IP flows . 32
5.4.1 General . 32
5.4.2 Access technology or access network selection . 33
5.4.2.1 ANDSF rules control the WLAN access selection and traffic routing . 33
5.4.2.2 RAN rules control the WLAN access selection and traffic routing . 33
6 UE – EPC Network protocols . 33
6.1 General . 33
6.2 Trusted and Untrusted Accesses . 33
6.2.1 General . 33
6.2.2 Pre-configured policies in the UE . 34
6.2.3 Dynamic Indication. 34
6.2.4 No trust relationship information . 34
6.3 IP Mobility Mode Selection . 34
6.3.1 General . 34
6.3.2 Static configuration of inter-access mobility mechanism . 34
6.3.3 Dynamic configuration of inter-access mobility mechanism . 35
6.3.3.0 General . 35
6.3.3.1 IPMS indication . 35
6.3.3.1.1 IPMS indication from UE to 3GPP AAA server . 35
6.3.3.1.2 IPMS indication from 3GPP AAA server to UE . 36
6.4 Authentication and authorization for accessing EPC via a trusted non-3GPP access network . 36
6.4.1 General . 36
6.4.1A TWAN connection modes . 37
6.4.2 UE procedures . 37
6.4.2.1 Identity Management . 37
6.4.2.1A Identity Management - emergency session . 37
6.4.2.2 EAP-AKA and EAP-AKA' based Authentication . 37
6.4.2.3 Full Authentication and Fast Re-authentication . 38
6.4.2.4 Handling of the Access Network Identity . 38
6.4.2.4.1 General . 38
6.4.2.4.2 ANID indication from 3GPP AAA server to UE . 39
6.4.2.4.3 UE check of ANID for HRPD CDMA 2000® access networks . 39
6.4.2.4.4 UE check of ANID for WiMAX access networks . 39
6.4.2.4.5 UE check of ANID for WLAN access networks . 39
6.4.2.4.6 UE check of ANID for ETHERNET access networks . 39
6.4.2.5 Full name for network and short name for network . 39
6.4.2.6 TWAN connection modes . 40
6.4.2.6.1 General . 40
6.4.2.6.2 Usage of single-connection mode (SCM) . 40
6.4.2.6.2A Usage of single-connection mode (SCM) - emergency . 43
6.4.2.6.3 Usage of multi-connection mode (MCM) . 44
6.4.2.6.3A Usage of multi-connection mode (MCM) - emergency . 45
6.4.2.6.3B Usage of transparent single-connection mode (TSCM) - emergency . 46
6.4.2.6.4 Network support not available . 46
6.4.2.7 Mobile Equipment Identity Signalling . 47
6.4.3 3GPP AAA server procedures . 48
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6.4.3.1 Identity Management . 48
6.4.3.1A Identity Management - emergency session . 48
6.4.3.2 EAP-AKA and EAP-AKA' based Authentication . 48
6.4.3.3 Full authentication and Fast Re-authentication . 48
6.4.3.4 Full name for network and short name for network . 48
6.4.3.5 TWAN connection modes . 49
6.4.3.5.1 General . 49
6.4.3.5.1A Emergency session connection mode negotiation for unauthenticated UEs . 49
6.4.3.5.2 Usage of single-connection mode (SCM) . 49
6.4.3.5.2A Usage of single-connection mode (SCM) - emergency . 51
6.4.3.5.3 Usage of multi-connection mode (MCM) . 52
6.4.3.5.3A Usage of multi-connection mode (MCM) - emergency . 53
6.4.3.5.3B Usage of transparent single-connection mode (TSCM) - emergency . 54
6.4.3.5.4 Network support not available . 55
6.4.3.6 Mobile Equipment Identity Signalling . 55
6.4.4 Multiple PDN support for trusted non-3GPP access . 55
6.5 Authentication and authorization for accessing EPC via an untrusted non-3GPP access network . 56
6.5.1 General . 56
6.5.2 Full authentication and authorization . 56
6.5.2.1 General . 56
6.5.2.2 UE procedures . 57
6.5.2.2.1 General . 57
6.5.2.2.2 EAP AKA . 57
6.5.2.3 3GPP AAA server procedures. 58
6.5.2.3.1 General . 58
6.5.2.3.2 EAP-AKA . 58
6.5.2.4 ePDG procedures . 58
6.5.3 Multiple PDN support for untrusted non-3GPP access network . 59 ®
6.6 UE - 3GPP EPC (cdma2000 HRPD Access) . 60
6.6.1 General . 60
6.6.2 Non-emergency case . 60
6.6.2.1 General . 60
6.6.2.2 UE identities . 60 ®
6.6.2.3 cdma2000 HRPD access network identity . 60
6.6.2.4 PLMN system selection . 60
6.6.2.5 Trusted and untrusted accesses . 60
6.6.2.6 IP mobility mode selection . 61
6.6.2.7 Authentication and authorization for accessing EPC . 61
6.6.3 Emergency case . 61
6.6.3.1 General . 61
6.6.3.2 UE identities . 61
6.6.3.3 Authentication and authorization for accessing EPC . 61
6.7 UE - 3GPP EPC (WiMAX Access) . 61
6.7.1 General . 61
6.7.2 Non-emergency case . 62
6.7.2.1 General . 62
6.7.2.2 UE identities . 62
6.7.2.3 WiMAX access network identity . 62
6.7.2.4 Selection of the Network Service Provider . 62
6.7.2.5 Trusted and untrusted accesses . 62
6.7.2.6 IP mobility mode selection . 62
6.7.2.7 Authentication and authorization for accessing EPC . 62
6.7.3 Emergency case . 62
6.8 Communication over the S14 . 62
6.8.1 General . 62
6.8.2 Interaction with the Access Network Discovery and Selection Function . 63
6.8.2.1 General . 63
6.8.2.2 UE procedures . 64
6.8.2.2.1 UE discovering the ANDSF . 64
6.8.2.2.1A ANDSF communication security . 64
6.8.2.2.2 Role of UE for Push model. 64
6.8.2.2.3 Role of UE for Pull model . 65
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6.8.2.2.4 UE using information provided by ANDSF . 65
6.8.2.3 ANDSF procedures . 70
6.8.2.3.1 General . 70
6.8.2.3.2 Role of ANDSF for Push model . 70
6.8.2.3.3 Role of ANDSF for Pull model . 71
6.9 Handling of Protocol Configuration Options information . 71
6.10 Integration with access stratum layer of 3GPP access . 71
6.10.1 General . 71
6.10.2 Selection of control of WLAN access selection and traffic routing . 71
6.10.3 Additional procedures when WLAN access selection and traffic routing is controlled by ANDSF
rules . 72
6.10.4 Additional procedures when WLAN access selection and traffic routing is controlled by RAN rules . 73
7 Tunnel management procedures . 74
7.1 General . 74
7.2 UE procedures . 75
7.2.1 Selection of the ePDG. 75
7.2.1.1 General . 75
7.2.1.2 Determination of the country the UE is located in . 75
7.2.1.3 Handling of ePDG selection based on the country the UE is located in . 75
7.2.1.4 Determine if the visited country mandates the selection of ePDG in this country . 78
7.2.1A Selection of the ePDG for emergency bearer services . 78
7.2.2 Tunnel establishment . 78
7.2.2.1 Tunnel establishment accepted by the network . 78
7.2.2.2 Tunnel establishment not accepted by the network . 81
7.2.2A Liveness check procedure . 82
7.2.2B Handling of NBIFOM . 83
7.2.2C Rekeying procedure . 83
7.2.2D NAT keep alive procedure . 83
7.2.3 Tunnel modificatio n . 83
7.2.3.1 UE-initiated modification . 83
7.2.3.2 UE behaviour towards ePDG initiated modification . 84
7.2.4 Tunnel disconnection . 84
7.2.4.1 UE initiated disconnection . 84
7.2.4.2 UE behaviour towards ePDG initiated disconnection . 84
7.2.4.3 Local tunnel disconnection initiated from 3GPP access . 85
7.2.5 Emergency session establishment . 85
7.2.6 Mobile identity signaling . 86
7.2.7 IKEv2 multiple bearer PDN connectivity . 87
7.2.7.1 General . 87
7.2.7.2 Maintained information . 87
7.2.7.3 Control plane procedures . 87
7.2.7.3.1 General . 87
7.2.7.3.2 Establishment of IKEv2 SA and initial IPSec ESP tunnel . 87
7.2.7.3.3 Establishment of an additional IPSec ESP tunnel . 88
7.2.7.3.4 Release of an additional IPSec ESP tunnel . 89
7.2.7.3.5 Modification of an IPSec ESP tunnel due to change of EPS QoS and TFT . 89
7.2.7.3.6 ePDG initiated IPSec ESP tunnel rekeying . 91
7.2.7.3.7 UE initiated IPSec ESP tunnel rekeying . 91
7.2.7.4 User plane procedures . 91
7.2.7.4.1 General . 91
7.2.7.4.2 Uplink IP packet handling . 91
7.3 3GPP AAA server procedures . 92
7.4 ePDG procedures . 92
7.4.1 Tunnel establishment . 92
7.4.1.1 Tunnel establishment accepted by the network . 92
7.4.1.2 Tunnel establishment not accepted by the network . 94
7.4.1A Liveness check . 95
7.4.1B Handling of NBIFOM . 95
7.4.1C Handling of N1 mode support. 95
7.4.2 Tunnel modificatio n . 95
7.4.2.1 ePDG-initiated modification . 95
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7.4.2.2 ePDG behaviour towards UE-initiated modification . 95
7.4.3 Tunnel disconnection . 96
7.4.3.1 ePDG initiated disconnection . 96
7.4.3.2 ePDG behaviour towards UE initiated disconnection . 96
7.4.3.3 Local tunnel disconnection initiated by PGW . 97
7.4.4 Emergency session establishment . 97
7.4.5 Mobile identity signaling . 98
7.4.6 IKEv2 multiple bearer PDN connectivity . 98
7.4.6.1 General . 98
7.4.6.2 Maintained information . 98
7.4.6.3 Control plane procedures . 99
7.4.6.3.1 General . 99
7.4.6.3.2 Establishment of IKEv2 SA and initial IPSec ESP tunnel . 99
7.4.6.3.3 Establishment of an additional IPSec ESP tunnel . 99
7.4.6.3.4 Release of an additional IPSec ESP tunnel . 99
7.4.6.3.5 Modification of an IPSec ESP tunnel due to change of EPS QoS and TFT . 99
7.4.6.3.6 ePDG initiated IPSec ESP tunnel rekeying . 100
7.4.6.3.7 UE initiated IPSec ESP tunnel rekeying . 100
7.4.6.4 User plane procedures . 100
7.4.6.4.1 General . 100
7.4.6.4.2 Downlink IP packet handling . 100
7.4.6.4.3 Uplink IP packet handling . 101
8 PDUs and parameters specific to the present document . 101
8.0 General . 101
8.1 3GPP specific coding information defined within
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