1、 ETSI TS 124 502 V15.0.0 (2018-06) 5G; Access to the 3GPP 5G Core Network (5GCN) via non-3GPP access networks (3GPP TS 24.502 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 124 502 V15.0.0 (2018-06)13GPP TS 24.502 version 15.0.0 Release 15Reference DTS/TSGC-0124502vf00 Keywords 5G E
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8、nefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members. GSMand the GSM logo are trademarks registered and owned by the GSM Association. ETSI ETSI TS 124 502 V15.0.0 (2018-06)23GPP TS 24.502 version 15.0.0 Release 15Intellectual Property
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13、nstitute an endorsement by ETSI of products, services or organizations associated with those trademarks. 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 3
14、GPP 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 presen
15、t 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 e
16、xcept when used in direct citation. ETSI ETSI TS 124 502 V15.0.0 (2018-06)33GPP TS 24.502 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 6g31 Scope 7g32 References 7g33 Definitions, symbols and abbreviations . 8g33.1 Definitions
17、8g33.2 Abbreviations . 8g34 General . 9g34.1 Overview 9g34.2 Untrusted access . 9g34.3 Identities . 9g34.3.1 User identities . 9g34.3.2 FQDN for N3IWF Selection . 9g34.4 Quality of service support 9g34.4.1 General 9g34.4.2 QoS differentiation in untrusted non-3GPP access . 10g34.4.2.1 General 10g34.
18、4.2.2 QoS signalling . 10g34.4.2.3 QoS differentiation in user plane 10g34.4.2.4 Reflective QoS 10g34.4.2.5 QoS enforcement. 10g35 Network discovery and selection . 10g35.1 General . 10g35.2 Access network discovery procedure . 10g35.2.1 General 10g35.2.2 Discovering availability of WLAN access netw
19、orks 11g35.3 Access network selection procedure. 11g35.3.1 General 11g35.3.2 WLAN selection procedure 11g35.3.2.1 General 11g35.3.2.2 Manual mode WLAN selection. 11g35.3.2.3 Automatic mode WLAN selection 11g35.4 Access network reselection procedure . 12g35.4.1 General 12g35.4.2 WLAN reselection proc
20、edure . 12g36 UE - 5GC network protocols 13g36.1 General . 13g36.2 Untrusted Accesses. 13g36.3 Authentication and authorization for accessing 5GS via an untrusted non-3GPP access network . 13g36.3.1 General 13g36.4 Handling of ANDSP Information . 13g36.4.1 General 13g36.4.2 UE procedures 13g36.4.2.1
21、 General 13g36.4.2.2 Use of WLAN selection information 14g36.8.2.3 Use of N3AN node information 14g36.4.3 ANDSP information from the network . 14g37 Security association management procedures 14g37.1 General . 14g37.2 N3AN node selection procedure 14g3ETSI ETSI TS 124 502 V15.0.0 (2018-06)43GPP TS 2
22、4.502 version 15.0.0 Release 157.2.1 General 14g37.2.2 N3AN node configuration information . 14g37.2.3 Determination of the country the UE is located in 15g37.2.4 N3AN node selection based on the country the UE is located in 15g37.2.4.1 General 15g37.2.4.2 Determine if the visited country mandates t
23、he selection of N3IWF in this country 15g37.2.4.3 UE procedure when the UE only supports connectivity with N3IWF 15g37.2.4.4 UE procedure when the UE supports connectivity with N3IWF and ePDG . 17g37.2.4.4.1 General 17g37.2.4.4.2 Node selection for IMS service . 18g37.2.4.4.3 Node selection for Non-
24、IMS service . 20g37.3 IKEv2 SA establishment procedure . 21g37.3.1 General 21g37.3.2 IKE SA and signalling IPsec SA establishment procedure . 21g37.3.3 EAP-5G procedure over non-3GPP access . 22g37.3.4 Abnormal cases in the UE 23g37.3.5 Abnormal cases in the N3IWF 23g37.4 IKEv2 SA deletion procedure
25、 23g37.4.1 General 23g37.4.2 IKE SA deletion procedure initiation 23g37.4.3 IKE SA deletion procedure accepted by the UE . 24g37.4.4 Abnormal cases in the UE 24g37.4.5 Abnormal cases in the N3IWF 24g37.5 User plane IPsec SA creation procedure 24g37.5.1 General 24g37.5.2 Child SA creation procedure i
26、nitiation . 24g37.5.3 Child SA creation procedure accepted by the UE . 24g37.5.4 Child SA creation procedure not accepted by the UE . 25g37.5.5 Abnormal cases in the UE 25g37.5.6 Abnormal cases in the N3IWF 25g37.6 IPSec SA modification procedure 25g37.7 IPSec SA deletion procedure 25g37.7.1 General
27、 25g37.7.2 Child SA deletion procedure initiation . 25g37.7.3 Child SA deletion procedure accepted by the UE . 25g37.7.4 Abnormal cases in the UE 25g37.7.5 Abnormal cases in the N3IWF 25g38 Message Transport procedures . 26g38.1 General . 26g38.2 Transport of NAS messages over control plane . 26g38.
28、2.1 General 26g38.2.2 ESP encapsulation 26g38.3 Transport of messages over user plane . 26g38.3.1 General 26g38.3.2 GRE encapsulation . 26g39 Parameters and coding 27g39.1 General . 27g39.2 3GPP specific coding information 27g39.3 IETF RFC coding information . 27g39.3.1 IKEv2 Notify payloads . 27g39
29、.3.1.1 5G_QOS_INFO Notify payload 27g39.3.2 EAP-5G method 28g39.3.2.1 General 28g39.3.2.2 Message format . 28g39.3.2.2.1 EAP-Request/5G-Start message 28g39.3.2.2.2 EAP-Response/5G-NAS message . 29g39.3.2.2.2.1 General . 29g39.3.2.2.2.2 Selected PLMN ID AN-parameter field 31g39.3.2.2.3 EAP-Request/5G
30、-NAS message 32g39.3.3 GRE encapsulated user data packet 32g3ETSI ETSI TS 124 502 V15.0.0 (2018-06)53GPP TS 24.502 version 15.0.0 Release 15Annex A (informative): Change history . 35g3History 36g3ETSI ETSI TS 124 502 V15.0.0 (2018-06)63GPP TS 24.502 version 15.0.0 Release 15Foreword This Technical S
31、pecification has been produced by the 3rd Generation Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the
32、TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is increment
33、ed for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 124 502 V15.0.0 (2018-06)73GPP TS 24.502 version 15.0.0 Release 151 Scope The present document sp
34、ecifies non-3GPP access network discovery and selection procedures, the access authorization procedure used for accessing untrusted non-3GPP access networks. The present document also specifies the security association management procedures used for establishing IKEv2 and IPSEC security associations
35、 from the UE to the N3IWF and the procedures for transporting messages between the UE N3IWF over the non-3GPP access networks. The present document is applicable to the UE and the network. In this technical specification the network refers to the 3GPP 5GCN and the untrusted non-3GPP access network.
36、2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. - References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. - For a specific reference, subseq
37、uent revisions do not apply. - For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. 1 3GPP TR
38、21.905: “Vocabulary for 3GPP Specifications“. 2 3GPP TS 23.501: “System Architecture for the 5G System; Stage 2“. 3 3GPP TS 23.502: “Procedures for the 5G System; Stage 2“. 4 3GPP TS 24.501: “Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3“. 5 3GPP TS 33.501: “Security architecture and pr
39、ocedures for 5G System“. 6 IETF RFC 7296: “Internet Key Exchange Protocol Version 2 (IKEv2)“. 7 3GPP TS 24.302: “Access to the 3GPP Evolved Packet Core (EPC) via non-3GPP access networks; Stage 3“. 8 3GPP TS 23.003: “Numbering, addressing and identification“. 9 IETF RFC 3748: “Extensible Authenticat
40、ion Protocol (EAP)“. 10 3GPP TS 33.402: “3GPP System Architecture Evolution (SAE); Security aspects of non-3GPP accesses.“ 11 IETF RFC 4303: “IP Encapsulating Security Payload (ESP)“. 12 IETF RFC 4301: “Security Architecture for the Internet Protocol“. 13 3GPP TS 23.122: “Non-Access-Stratum (NAS) fu
41、nctions related to Mobile Station (MS) in idle mode“. 14 IETF RFC 2784: “Generic Routing Encapsulation (GRE)“. 15 IETF RFC 2890: “Key and Sequence Number Extensions to GRE“. 16 3GPP TS 23.503: “Policy and Charging Control Framework for the 5G System“. 17 3GPP TS 24.5xx: “UE policies for 5G System (5
42、GS)“. 18 3GPP TS 23.402: “Architecture enhancements for non-3GPP accesses“. ETSI ETSI TS 124 502 V15.0.0 (2018-06)83GPP TS 24.502 version 15.0.0 Release 1519 IEEE Std 802.11-2012: “IEEE Standard for Information technology - Telecommunications and information exchange between systems - Local and metr
43、opolitan area networks - Specific requirements - Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications“. 20 Wi-Fi Alliance: “Hotspot 2.0 (Release 2) Technical Specification, version 1.0.0“, 2014-08-08. 21 ITU-T Recommendation E.212: “The international identificati
44、on plan for mobile terminals and mobile users“. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 1 and the following apply. A term defined in the present document takes precedence over the definition
45、of the same term, if any, in 3GPP TR 21.905 1. NWu: In this specification, NWu is the reference point between the UE and the N3IWF for establishing secure tunnel(s) between the UE and the N3IWF so that control-plane and user-plane exchanged between the UE and the 5G core network is transferred secur
46、ely over untrusted non-3GPP access. For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.501 2 apply: 5G Access Network 5G Core Network 5G QoS flow 5G QoS identifier 5G System PDU Session For the purposes of the present document, the following terms and d
47、efinitions given in 3GPP TS 23.003 8 apply: NAI For the purposes of the present document, the following terms and definitions given in 3GPP TS 33.501 5 apply: SUPI 3.2 Abbreviations For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 1 and the following apply. An abbr
48、eviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 1. 5GCN 5G Core Network 5GS 5G System 5G-AN 5G Access Network 5QI 5G QoS Identifier AMF Access and Mobility Management Function ANDS Access Network Discovery and Selectio
49、n ANDSP Access Network Discovery and Selection Policy AUSF Authentication Server Function CP Control Plane DL DownlinkDNS Domain Name System DSCP Differentiated Services Code Point ePDG Evolved Packet Data Gateway ESP Encapsulating Security Payload FQDN Fully Qualified Domain Name N3AN Non-3GPP Access Network N3IWF Non-3GPP InterWorking Function ETSI ETSI TS 124 502 V15.0.0 (2018-06)93GPP TS 24.502 version 15.0.0 Release 15NAI Network Access Identifier QFI QoS Flow Identifier SA Security Association SPI Security Parameter
