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TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
Architecture enhancements for non-3GPP accesses
(3GPP TS 23.402 version 15.3.0 Release 15)
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3GPP TS 23.402 version 15.3.0 Release 15 1 ETSI TS 123 402 V15.3.0 (2018-07)
Reference
RTS/TSGS-0223402vf30
Keywords
LTE,UMTS
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3GPP TS 23.402 version 15.3.0 Release 15 2 ETSI TS 123 402 V15.3.0 (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/).
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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 23.402 version 15.3.0 Release 15 3 ETSI TS 123 402 V15.3.0 (2018-07)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 11
Introduction . 11
1 Scope . 12
2 References . 12
3 Definitions, Symbols and Abbreviations . 15
3.1 Definitions . 15
3.2 Abbreviations . 16
4 Architecture Model and Concepts . 17
4.1 Concepts . 17
4.1.0 General Concepts . 17
4.1.1 General Concepts for Interworking Between E-UTRAN and CDMA2000 . 17
4.1.2 General Concepts for Interworking Between 3GPP Accesses and WiMAX . 18
4.1.3 IP Mobility Management Selection Principles . 18
4.1.3.1 Static Configuration of Inter-technology Mobility Mechanism . 18
4.1.3.2 Networks Supporting Multiple IP Mobility Mechanisms . 18
4.1.3.2.1 IP Mobility Management Selection During Initial Attach to a Non-3GPP Access . 19
4.1.3.2.2 IPMS solutions . 20
4.1.3.2.3 IP Mobility Management Selection on Handover between accesses . 20
4.1.4 Trusted/untrusted non-3GPP access network detection . 21
4.1.5 Non-seamless WLAN offload. 21
4.2 Architecture Reference Model . 21
4.2.1 Architecture for 3GPP Accesses with PMIP-based S5/S8 . 21
4.2.2 Non-roaming Architectures for EPS . 22
4.2.3 Roaming Architectures for EPS . 24
4.3 Network Elements . 28
4.3.1 Access Networks . 28
4.3.1.1 E-UTRAN . 28
4.3.1.2 Trusted and Untrusted Non-3GPP Access Network . 28
4.3.2 MME . 29
4.3.3 Gateway . 29
4.3.3.1 General . 29
4.3.3.2 Serving GW. 29
4.3.3.3 PDN GW . 30
4.3.4 ePDG . 30
4.3.5 PCRF . 31
4.3.5.1 Home PCRF . 31
4.3.5.2 Visited PCRF . 31
4.4 Reference Points . 31
4.4.1 List of Reference Points . 31
4.4.2 Reference Point Requirements . 33
4.4.2.1 S5 Reference Point Requirements . 33
4.4.2.2 Void. 33
4.4.2.3 Void. 33
4.4.2.4 Void. 34
4.5 High Level Functions . 34
4.5.1 PDN GW Selection Function for Non-3GPP Accesses for S2a and S2b . 34
4.5.1a PDN GW Selection Function for eHRPD with SIPTO support . 35
4.5.2 PDN GW Selection Function for S2c . 35
4.5.3 Serving GW Selection Function for Non-3GPP Accesses . 36
4.5.4 ePDG Selection . 36
4.5.4.1 General . 36
ETSI
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3GPP TS 23.402 version 15.3.0 Release 15 4 ETSI TS 123 402 V15.3.0 (2018-07)
4.5.4.2 ePDG FQDNs Construction . 36
4.5.4.3 UE Configuration By HPLMN . 37
4.5.4.4 UE ePDG Selection Procedure . 37
4.5.4.5 ePDG Selection with DNS-based Discovery of Regulatory Requirements . 38
4.5.4a ePDG Selection for Emergency Services . 39
4.5.4a.1 General . 39
4.5.4a.2 Emergency ePDG Selection Procedure . 39
4.5.5 PCRF Selection . 39
4.5.6 DSMIPv6 Home Link Detection Function . 39
4.5.7 IMS Emergency Session Support . 40
4.5.7.1 Overview . 40
4.5.7.2 IMS Emergency Session Support over WLAN access to EPC . 40
4.5.7.2.1 Introduction . 40
4.5.7.2.2 Architecture Reference Model for Emergency Services. 41
4.5.7.2.3 PDN GW selection function for Emergency Services . 41
4.5.7.2.4 QoS for Emergency Services . 42
4.5.7.2.5 PCC for Emergency Services . 42
4.5.7.2.6 IP Address Allocation . 42
4.5.7.2.7 Handling of PDN Connections for Emergency Bearer Services . 42
4.5.7.2.8 Network provided WLAN Location Information . 42
4.5.7.2.9 Determination of location . 44
4.5.7.2.10 Support of PS handover with 3GPP EPC . 44
4.5.8 APN congestion Control Function for eHRPD . 45
4.5.9 GTP-C signalling based Load and Overload Control for trusted and untrusted WLAN . 45
4.5.9.1 GTP-C load control . 45
4.5.9.2 GTP-C overload control . 45
4.6 Identities . 46
4.6.1 User Identification . 46
4.6.2 EPS bearer identity with GTP based S2b/S2a. 47
4.7 IP Address Allocation . 47
4.7.1 IP Address Allocation with PMIP-based S5/S8 . 47
4.7.2 IP Address Allocation in Trusted Non-3GPP IP Access using PMIPv6 on S2a . 51
4.7.3 IP Address Allocation in Untrusted Non-3GPP IP Access using PMIPv6 or GTP on S2b . 54
4.7.4 IP Address Allocation using S2c . 54
4.7.5 IPv6 Prefix Delegation using S2c . 55
4.7.6 IPv6 Prefix Delegation using PMIP-based S5/S8 . 55
4.8 Network Discovery and Selection . 57
4.8.0 General Principles . 57
4.8.1 Architecture for Access Network Discovery Support Functions . 58
4.8.2 Network Elements . 59
4.8.2.1 Access Network Discovery and Selection Function (ANDSF) . 59
4.8.2.1.1 General . 59
4.8.2.1.2 Inter-System Mobility Policy . 59
4.8.2.1.3 Access Network Discovery Information . 60
4.8.2.1.4 Inter-System Routing Policy . 60
4.8.2.1.5 Inter-APN Routing Policy . 61
4.8.2.1.6 WLAN Selection Policy . 62
4.8.2.1.7 VPLMNs with preferred WLAN Selection Rules . 63
4.8.2.1.8 Void . 64
4.8.2.1.9 Home Network Preferences . 64
4.8.2.1.10 Visited Network Preferences . 64
4.8.2a UE Procedures . 64
4.8.2a.1 Selection of Active ANDSF Rules . 64
4.8.2a.2 UE Behavior Based on the ANDSF Information . 65
4.8.2b WLAN Selection based on WLANSP . 68
4.8.3 Reference Points . 69
4.8.4 ANDSF Discovery . 70
4.8.5 Void . 70
4.8.6 Support of RAN Assistance Information . 70
4.8.6.1 General . 70
4.8.6.2 ANDSF Rules Utilizing RAN Assistance Information . 70
4.8.6.3 Evaluation of ANDSF Rules with RAN Validity Conditions . 71
ETSI
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3GPP TS 23.402 version 15.3.0 Release 15 5 ETSI TS 123 402 V15.3.0 (2018-07)
4.8.6.4 Co-existence with RAN Rules . 72
4.8.7 Support of LWA, LWIP and RCLWI . 73
4.8.7.1 General . 73
4.8.7.2 Co-existence with LWA and RCLWI . 73
4.8.7.3 Co-existence with LWIP . 74
4.9 Authentication and Security . 74
4.9.1 Access Authentication in non-3GPP Accesses . 74
4.9.2 Tunnel Authentication . 74
4.9.3 Support for EAP Re-Authentication . 74
4.10 QoS Concepts . 75
4.10.1 General . 75
4.10.2 Void . 75
4.10.3 The EPS Bearer with PMIP-based S5/S8 and E-UTRAN access . 75
4.10.4 Application of PCC in the Evolved Packet System . 76
4.10.5 PDN connectivity service with GTP based S2b . 76
4.10.5.1 Single IPSec SA per PDN Connection Scenario . 77
4.10.5.2 Single IPsec SA per S2b bearer Scenario . 77
4.11 Charging for Non-3GPP Accesses . 79
4.12 Multiple PDN Support . 79
4.13 Detach principles . 80
5 Functional Description and Procedures for 3GPP Accesses with PMIP-based S5/S8 . 80
5.1 Control and User Plane Protocol Stacks . 80
5.1.1 Void . 80
5.1.2 General . 80
5.1.3 Control Plane . 80
5.1.3.1 Serving GW - PDN GW . 80
5.1.4 User Plane . 81
5.1.4.1 UE – PDN GW User Plane with E-UTRAN . 81
5.1.4.2 UE – PDN GW User Plane with 2G access via the S4 Interface . 82
5.1.4.3 UE – PDN GW User Plane with 3G Access via the S4 Interface . 82
5.1.4.4 UE – PDN-GW User Plane with 3G Access via the S12 Interface . 83
5.2 Initial E-UTRAN Attach with PMIP-based S5 or S8 . 83
5.3 Detach for PMIP-based S5/S8 . 86
5.4 Dedicated Bearer Procedures for E-UTRAN Access with PMIP-based S5/S8 . 88
5.4.1 General . 88
5.4.2 Dedicated Bearer Activation . 89
5.4.3 Bearer Modification with Bearer QoS Update . 89
5.4.3.1 PCC Initiated Bearer Modification with Bearer QoS Update . 89
5.4.3.2 HSS-Initiated Subscribed QoS Modification . 89
5.4.4 Dedicated Bearer Modification without Bearer QoS Update . 90
5.4.5 Dedicated Bearer Deactivation . 91
5.4.5.1 PCC-initiated Dedicated Bearer Deactivation . 91
5.4.5.2 Void. 91
5.4.5.3 MME-initiated Dedicated Bearer Deactivation . 91
5.5 UE-initiated Resource Request and Release. 92
5.6 Multiple PDN Support with PMIP-based S5/S8 . 93
5.6.1 UE requested PDN connectivity . 93
5.6.2 PDN Disconnection .
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