1、 ETSI TS 124 322 V14.0.0 (2017-03) Universal Mobile Telecommunications System (UMTS); LTE; Tunnelling of IP Multimedia Subsystem (IMS) services over restrictive access networks; Stage 3 (3GPP TS 24.322 version 14.0.0 Release 14) TECHNICAL SPECIFICATION ETSI ETSI TS 124 322 V14.0.0 (2017-03)13GPP TS
2、24.322 version 14.0.0 Release 14Reference RTS/TSGC-0124322ve00 Keywords LTE,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grass
3、e (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified with
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8、re Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 124 322 V14.0.0 (
9、2017-03)23GPP TS 24.322 version 14.0.0 Release 14Intellectual Property Rights IPRs essential or potentially essential to the present document 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
10、 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 IP
11、R 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. Foreword Thi
12、s 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 correspondi
13、ng 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“ ar
14、e 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 ETSI TS 124 322 V14.0.0 (2017-03)33GPP TS 24.322 version 14.0.0 Release 14Co
15、ntents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g31 Scope 6g32 References 6g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 7g34 UE network protocols 7g34.1 General . 7g35 FTT-IMS protocol 8g35.1 General . 8g35.2 UE requested F
16、TT-IMS establishment procedure 8g35.2.1 General 8g35.2.2 UE procedures 8g35.2.2.1 UE requested FTT-IMS establishment procedure initiation 8g35.2.2.2 UE requested FTT-IMS establishment procedure initiation via restrictive non-3GPP access network type I . 8g35.2.2.3 UE requested FTT-IMS establishment
17、procedure initiation via restrictive non-3GPP access network type II 8g35.2.2.4 UE requested FTT-IMS establishment procedure accepted 9g35.2.3 EFTF procedures 9g35.3 IP packet transport FTT-IMS procedure 9g35.3.1 General 9g35.3.2 UE procedures 9g35.3.2.1 IP packet sending 9g35.3.2.2 IP packet receiv
18、ing 9g35.3.3 EFTF procedures 9g35.3.3.1 IP packet sending 9g35.3.3.2 IP packet receiving 9g35.4 UE requested FTT-IMS release procedure . 10g35.4.1 General 10g35.4.2 UE procedures 10g35.4.3 EFTF procedures 10g35.5 EFTF requested FTT-IMS release procedure . 10g35.5.1 General 10g35.5.2 EFTF procedures
19、10g35.5.3 UE procedures 10g35.6 Procedure for unknown FTT-IMS envelope types . 10g35.6.1 General 10g35.6.2 UE procedures 11g35.6.3 EFTF procedures 11g36 IP roles and IP based procedures 11g36.1 General . 11g36.2 IP roles . 11g36.2.1 UE procedures 11g36.2.2 EFTF procedures 11g36.3 Inner IP address as
20、signment procedure 11g36.3.1 UE procedures 11g36.3.2 EFTF procedures 12g37 PDUs and parameters . 12g3ETSI ETSI TS 124 322 V14.0.0 (2017-03)43GPP TS 24.322 version 14.0.0 Release 147.1 PDUs and parameters specific to FTT-IMS protocol . 12g37.1.1 General 12g37.1.2 Message types of FTT-IMS messages 12g
21、37.1.2.1 Generic FTT-IMS envelope 12g37.1.2.2 IP packet envelope 13g3Annex A (informative): Change history . 14g3History 15g3ETSI ETSI TS 124 322 V14.0.0 (2017-03)53GPP TS 24.322 version 14.0.0 Release 14Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership
22、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 TSG with an identifying change of release date and an increase in
23、 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 incremented for all changes of substance, i.e. technical enhancements, cor
24、rections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 124 322 V14.0.0 (2017-03)63GPP TS 24.322 version 14.0.0 Release 141 Scope The present document specifies procedures and protocol elements for tunnelling of IMS tr
25、affic over restrictive access networks, specifically procedures and protocol elements for establishing, maintaining, and sending traffic via a firewall traversal tunnel between the UE and an enhanced firewall traversal function (EFTF) in the network. The present document is applicable to UE and EFTF
26、. The present document applies only to the case when the IMS traffic is not routed via EPC of a PLMN. Procedures for tunnelling of IMS traffic that is routed via EPC are specified in 3GPP TS 24.302 3 annex F. 2 References The following documents contain provisions which, through reference in this te
27、xt, 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, subsequent revisions do not apply. For a non-specific reference, the latest version applies. In the c
28、ase 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 21.905: “Vocabulary for 3GPP Specifications“. 2 3GPP TS 24.229: “IP multimedia call control proto
29、col based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3“. 3 3GPP TS 24.302: “Access to the 3GPP Evolved Packet Core (EPC) via non-3GPP access networks; Stage 3“. 4 3GPP TS 33.203: “3G security; Access security for IP-based services“. 5 IETF RFC 791 (September 1
30、981): “Internet Protocol“. 6 IETF RFC 2131 (March 1997): “Dynamic Host Configuration Protocol“. 7 IETF RFC 2460 (December 1998): “Internet Protocol, Version 6 (IPv6) Specification“. 8 IETF RFC 2817 (May 2000): “Upgrading to TLS Within HTTP/1.1“. 9 IETF RFC 3736 (April 2004): “Stateless Dynamic Host
31、Configuration Protocol (DHCP) Service for IPv6“. 10 IETF RFC 4291 (February 2006): “IP Version 6 Addressing Architecture“. 11 IETF RFC 4862 (September 2007): “IPv6 Stateless Address Autoconfiguration“. 12 Void. 13 Void. 14 3GPP TS 33.310: “Network Domain Security (NDS); Authentication Framework (AF)
32、“. ETSI ETSI TS 124 322 V14.0.0 (2017-03)73GPP TS 24.322 version 14.0.0 Release 143 Definitions 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 preced
33、ence over the definition of the same term, if any, in 3GPP TR 21.905 1. Firewall traversal tunnel to IP network of IMS: a TCP connection with TLS connection enabling passing of envelopes between UE in restrictive non-3GPP access network and EFTF, established in order to reach IP network of IP multim
34、edia core network subsystem. For the purposes of the present document, the following terms and definitions given in 3GPP TS 24.229 2 apply: IP multimedia core network subsystem For the purposes of the present document, the following terms and definitions given in 3GPP TS 24.302 3 apply: Restrictive
35、non-3GPP access network type I Restrictive non-3GPP access network type II Restrictive non-3GPP access network For the purposes of the present document, the following terms and definitions given in 3GPP TS 33.203 4 apply: Enhanced firewall traversal function 3.2 Abbreviations For the purposes of the
36、 present document, the abbreviations given in 3GPP TR 21.905 1 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 1. EFTF Enhanced firewall traversal function FTT-IMS Firewall traversal tun
37、nel to IP network of IMS HTTP Hypertext transfer protocol IMS IP multimedia core network subsystem TCP Transmission control protocol TLS Transport layer security URI Uniform resource identifier 4 UE network protocols 4.1 General In order to access to IMS via restrictive non-3GPP access network, the
38、UE and the EFTF shall establish a firewall traversal tunnel to IP network of IMS (FTT-IMS) using the UE requested FTT-IMS establishment procedure according to subclause 5.2. The UE and the EFTF shall send the IP packets using the IP packet transport FTT-IMS procedure according to subclause 5.3. The
39、UE and the EFTF shall use the IP protocol according to clause 6. When FTT-IMS is no longer needed (e.g. if the UE deregistered from IMS), the UE shall perform the UE requested FTT-IMS release procedure according to subclause 5.4. ETSI ETSI TS 124 322 V14.0.0 (2017-03)83GPP TS 24.322 version 14.0.0 R
40、elease 14When FTT-IMS is no longer needed, the EFTF can perform the EFTF requested FTT-IMS release procedure according to subclause 5.5. NOTE: Keep-alive functionality is not defined in this document. Keep-alive functionality defined in 3GPP TS 24.229 2 can be used to maintain the FTT-IMS between th
41、e UE and the EFTF. 5 FTT-IMS protocol 5.1 General The FTT-IMS protocol consists of the UE requested FTT-IMS establishment procedure, the IP packet transport FTT-IMS procedure, the UE requested FTT-IMS release procedure and the EFTF requested FTT-IMS release procedure. 5.2 UE requested FTT-IMS establ
42、ishment procedure 5.2.1 General The purpose of the UE requested FTT-IMS establishment procedure is to establish an FTT-IMS between the UE and the EFTF. 5.2.2 UE procedures 5.2.2.1 UE requested FTT-IMS establishment procedure initiation If the UE is not configured with an HTTP proxy address, the UE s
43、hall follow the procedures in subclause 5.2.2.2. If the UE is configured with an HTTP proxy address, the UE shall follow the procedures in subclause 5.2.2.3. NOTE: UE configuration of an HTTP proxy address is out of scope of 3GPP. 5.2.2.2 UE requested FTT-IMS establishment procedure initiation via r
44、estrictive non-3GPP access network type I In order to establish an FTT-IMS, the UE shall establish a TCP connection to the EFTF address and destination port 443. If the TCP connection establishment is successful, the UE shall establish a TLS connection over the TCP connection according to the TLS pr
45、ofile specified in 3GPP TS 33.310 14 annex E. If the EFTF address is a FQDN, the UE shall include a TLS extension of type “server_name“ in the TLS client hello message according to the TLS profile specified in 3GPP TS 33.310 14 annex E. 5.2.2.3 UE requested FTT-IMS establishment procedure initiation
46、 via restrictive non-3GPP access network type II If the UE is configured with HTTP proxy address, in order to establish an FTT-IMS, the UE shall send HTTP CONNECT request to the HTTP proxy address according to IETF RFC 2817 8. The UE shall populate Request-URI of the HTTP CONNECT request with the EF
47、TF address and port 443. Upon receiving HTTP 2xx response to HTTP CONNECT request, the UE shall establish TLS connection according to the TLS profile specified in 3GPP TS 33.310 14 annex E over the TCP connection used for the HTTP CONNECT request transport. If the EFTF address is a FQDN, the UE shal
48、l include a TLS extension of type “server_name“ in the TLS client hello message according to the TLS profile specified in 3GPP TS 33.310 14 annex E. ETSI ETSI TS 124 322 V14.0.0 (2017-03)93GPP TS 24.322 version 14.0.0 Release 145.2.2.4 UE requested FTT-IMS establishment procedure accepted When valid
49、 TLS Finished message is received over the TCP connection, the UE shall use the connection as the FTT-IMS. 5.2.3 EFTF procedures The EFTF shall handle the TCP connection setup and the TLS connection establishment according to the TLS profile specified in 3GPP TS 33.310 14 annex E. When TLS Finished message is sent over the TCP connection according to the TLS profile specified in 3GPP TS 33.310 14 annex E, the EFTF shall use the connection as the FTT-IMS. 5.3 IP packet transport FTT-IMS procedure 5.3.1 Gener
