1、 ETSI TS 1EvolvedRadio AccX(3GPP TS 36.4TECHNICAL SPECIFICATION136 424 V13.1.0 (2016LTE; ed Universal Terrestrial ccess Network (E-UTRAN); X2 data transport .424 version 13.1.0 Release 1316-05) 13) ETSI ETSI TS 136 424 V13.1.0 (2016-05)13GPP TS 36.424 version 13.1.0 Release 13Reference RTS/TSGR-0336
2、424vd10 Keywords LTE 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 Grasse (06) N 7803/88 Important notice The present document can b
3、e 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 without the prior written authorization of ETSI. In case of any
4、existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be
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6、/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the wri
7、tten authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2016. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPP
8、TM 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 136 424 V13.1.0 (2016-05)23GPP TS 36.424 version 13.1.0 Release 13Intellectual Property
9、 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 found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essen
10、tial, 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 IPR Policy, no investigation, including IPR searches, has been carried o
11、ut 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 This Technical Specification (TS) has been produced by ETSI 3rd Generatio
12、n 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
13、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 Ru
14、les (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 136 424 V13.1.0 (2016-05)33GPP TS 36.424 version 13.1.0 Release 13Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs termi
15、nology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions, symbols and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 6g34 Data link layer 6g35 X2 interface user plane protocol 6g35.1 General . 6g35.2 GTP-U 7g35.3 UDP/IP . 7g35.4 Diffserv code point marking . 7g35.5 Dual Connectivi
16、ty. 7g3Annex A (informative): Change history . 8g3History 9g3ETSI ETSI TS 136 424 V13.1.0 (2016-05)43GPP TS 36.424 version 13.1.0 Release 13Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subject to con
17、tinuing 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 version number as follows: Version x.y.z where: x the first digit: 1 p
18、resented 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, corrections, updates, etc. z the third digit is incremented when editorial
19、 only changes have been incorporated in the document. ETSI ETSI TS 136 424 V13.1.0 (2016-05)53GPP TS 36.424 version 13.1.0 Release 131 Scope The present document specifies the standards for user data transport protocols and related signalling protocols to establish user plane transport bearers over
20、the X2 interface. 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 ref
21、erence, subsequent 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
22、. 1 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 2 3GPP TS 29.281: “General Packet Radio System (GPRS) Tunnelling Protocol User Plane (GTPv1-U)“. 3 IETF RFC 768 (1980-08): “User Datagram Protocol“. 4 IETF RFC 2474 (1998-12): “Definition of the Differentiated Services Field (DS Field) in the
23、 Ipv4 and Ipv6 Headers“. 5 IETF RFC 2460 (1998-12): “Internet Protocol, Version 6 (IPv6) Specification“. 6 IETF RFC 791 (1981-09): “Internet Protocol“. 7 3GPP TS 36.401: “Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Architecture Description“. 8 3GPP TS 36.300: “Evolved Universal Ter
24、restrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2“. 9 3GPP TS 36.425: “Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 interface user plane protocol“. 3 Definitions, symbols and abbreviations 3.1 Definitions
25、 For the purposes of the present document, the following terms and definitions below apply. Terms and definitions not defined below can be found in TR 21.905 1. Dual Connectivity: Defined in TS 36.300 8. E-RAB: Defined in TS 36.401 7. X2: logical interface between two eNBs. Whilst logically represen
26、ting a point to point link between eNBs, the physical realisation need not be a point to point link. ETSI ETSI TS 136 424 V13.1.0 (2016-05)63GPP TS 36.424 version 13.1.0 Release 133.2 Abbreviations For the purposes of the present document, the abbreviations given in TR 21.905 1 and the following app
27、ly. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905 1. DC Dual Connectivity eNB E-UTRAN Node B E-RAB E-UTRAN Radio Access Bearer E-UTRAN Evolved UTRAN GTP GPRS Tunnelling Protocol IP Internet Protocol MeNB Master eNB
28、 PDCP Packet Data Convergence Protocol PDU Protocol Data Unit SCG Secondary Cell Group SeNB Secondary eNB TEID Tunnel Endpoint Identifier UDP User Datagram Protocol 4 Data link layer Any data link protocol that fulfils the requirements toward the upper layer may be used. 5 X2 interface user plane pr
29、otocol 5.1 General The transport layer for data streams over X2 is an IP based Transport. The following figure shows the transport protocol stacks over X2. GTP-U UDP IPv6 (RFC 2460) and/or IPv4 (RFC 791) Data link layer Physical layer Figure 5.1: Transport network layer for data streams over X2 The
30、GTP-U (TS 29.281 2) protocol over UDP over IP shall be supported as the transport for data streams on the X2 interface. The data link layer is as specified in clause 4. There may be zero or one UL data stream and zero or one DL data stream per E-RAB at the X2 interface. - The DL data stream is used
31、for DL data forwarding from the source eNB to the target eNB. - The UL data stream is used for UL data forwarding from the source eNB to the target eNB. Each data stream is carried on a dedicated transport bearer. The identity of a transport bearer signalled in the RNL control plane consists of the
32、IP address and the TEID of the corresponding GTP tunnel, allocated by the target eNB (see TS 29.281 2). ETSI ETSI TS 136 424 V13.1.0 (2016-05)73GPP TS 36.424 version 13.1.0 Release 135.2 GTP-U The GTP-U (TS 29.281 2) protocol shall be used over the X2 interface between two eNBs. 5.3 UDP/IP The path
33、protocol used shall be UDP (IETF RFC 768 3). The UDP port number for GTP-U shall be as defined in TS 29.281 2. The eNBs over the X2 interface shall support fragmentation and assembly of GTP packets at the IP layer. The eNB shall support IPv6 (IETF RFC 2460 5) and/or IPv4 (IETF RFC 791 6). There may
34、be one or several IP addresses in the both eNBs. The packet processing function in the source eNB shall send downstream packets of a given E-RAB to the target eNB IP address (received in X2AP) associated to the DL transport bearer of that particular E-RAB. The packet processing function in the sourc
35、e eNB shall send upstream packets of a given E-RAB to the target eNB IP address (received in X2AP) associated to the UL transport bearer of that particular E-RAB. The Transport Layer Address signalled in X2AP messages is a bit string of either a) 32 bits in case of IPv4 address according to IETF RFC
36、 791 6; or b) 128 bits in case of IPv6 address according to IETF RFC 2460 5. 5.4 Diffserv code point marking IP Differentiated Services code point marking (IETF RFC 2474 4) shall be supported. The mapping between traffic categories and Diffserv code points shall be configurable by O - The DL data st
37、ream is used for DL data transmission from the MeNB to the SeNB; - The UL data stream is used for UL data transmission from the SeNB to the MeNB; - the packet processing function in the MeNB shall send downstream packets of a given E-RAB to the SeNB IP address (received in X2AP) associated to the DL
38、 transport bearer of that particular E-RAB. The packet processing function in the SeNB shall send upstream packets of a given E-RAB to the MeNB IP address (received in X2AP) associated to the UL transport bearer of that particular E-RAB; - data forwarding may be performed by MeNB providing GTP-U TEI
39、D to receive the DL data forwarded by the SeNB. ETSI ETSI TS 136 424 V13.1.0 (2016-05)83GPP TS 36.424 version 13.1.0 Release 13Annex A (informative): Change history TSG # TSG Doc. CR Rev Subject/Comment New 38 approved at TSG-RAN and placed under change control 8.0.0 39 RP-080078 0001 - Editorial co
40、rrection on 36.424 8.1.0 39 RP-080078 0002 - Data link layer proposal 8.1.0 40 RP-080302 0003 1 eGTP draft reference for X2 Data Transport 8.2.0 40 RP-080302 0005 - Define format for TLA signalled in X2AP messages 8.2.0 41 RP-080583 0006 1 X2 transport bearers 8.3.0 42 RP-080845 0007 Correction of S
41、AE Bearer 8.4.0 43 RP-090083 0008 Correction on GTP-U version 8.5.0 09/2009 - - - Creation of Rel-9 version based on v8.5.0 9.0.0 12/2010 Creation of Rel-10 version based on v. 9.0.0 10.0.0 SP-49 SP-100629 Clarification on the use of References (TS 21.801 CR#0030) 10.0.1 52 RP-110684 0009 Correction
42、 of references 10.1.0 09/2012 Update to Rel-11 version (MCC) 11.0.0 63 RP-140297 0011 1 The content of Transport Layer Address 12.0.0 66 RP-142089 0013 6 Data Forwarding and Data transmission 12.1.0 67 RP-150351 0021 1 Correction on Data Transmission over X2 12.2.0 12/2015 Update to Rel-13 version (MCC) 13.0.0 71 RP-160449 0022 1 Rapporteur editorial corrections 13.1.0 ETSI ETSI TS 136 424 V13.1.0 (2016-05)93GPP TS 36.424 version 13.1.0 Release 13History Document history V13.0.0 January 2016 Publication V13.1.0 May 2016 Publication
