1、 ETSI TS 136 424 V14.0.0 (2017-04) LTE; Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 data transport (3GPP TS 36.424 version 14.0.0 Release 14) TECHNICAL SPECIFICATION ETSI ETSI TS 136 424 V14.0.0 (2017-04)13GPP TS 36.424 version 14.0.0 Release 14Reference RTS/TSGR-0336424ve00 Key
2、words 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 be downloade
3、d 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 existing or
4、 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 subject to
5、 revision or change of status. Information on the current status of this and other ETSI documents is available at https:/portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the following services: https:/portal.etsi.org/People/
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 writ
7、ten authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPT
8、M and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 136 424 V14.0.0 (2017-04)23GPP T
9、S 36.424 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 found in ETSI
10、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 IPR Policy, no in
11、vestigation, 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 This Technical Spe
12、cification (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 deliver
13、ables. 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“ are to be interpr
14、eted 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 136 424 V14.0.0 (2017-04)33GPP TS 36.424 version 14.0.0 Release 14Contents Intellec
15、tual Property Rights 2g3Foreword . 2g3Modal verbs terminology 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
16、.4 Diffserv code point marking . 7g35.5 Dual Connectivity. 7g3Annex A (informative): Change history . 8g3History 9g3ETSI ETSI TS 136 424 V14.0.0 (2017-04)43GPP TS 36.424 version 14.0.0 Release 14Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP).
17、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 version number
18、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, corrections, update
19、s, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 136 424 V14.0.0 (2017-04)53GPP TS 36.424 version 14.0.0 Release 141 Scope The present document specifies the standards for user data transport protocols and related signalling pr
20、otocols to establish user plane transport bearers over 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,
21、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 case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version
22、 of that document in the same Release as the present document. 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): “Defi
23、nition of the Differentiated Services Field (DS Field) in the 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); Archit
24、ecture Description“. 8 3GPP TS 36.300: “Evolved Universal Terrestrial 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 protoc
25、ol“. 3 Definitions, symbols and abbreviations 3.1 Definitions 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:
26、logical interface between two eNBs. Whilst logically representing a point to point link between eNBs, the physical realisation need not be a point to point link. ETSI ETSI TS 136 424 V14.0.0 (2017-04)63GPP TS 36.424 version 14.0.0 Release 143.2 Abbreviations For the purposes of the present document,
27、 the abbreviations given in 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 TR 21.905 1. DC Dual Connectivity eNB E-UTRAN Node B E-RAB E-UTRAN Radio Access Bearer E-UTRAN Evolved UTRAN GTP
28、GPRS Tunnelling Protocol IP Internet Protocol MeNB Master eNB 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 tow
29、ard the upper layer may be used. 5 X2 interface user plane protocol 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 Figu
30、re 5.1: Transport network layer for data streams over X2 The 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
31、 per E-RAB at the X2 interface. - The DL data stream is used 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 transpo
32、rt bearer signalled in the RNL control plane consists of the 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 V14.0.0 (2017-04)73GPP TS 36.424 version 14.0.0 Release 145.2 GTP-U The GTP-U (TS 29.281 2) protocol shall be used
33、 over the X2 interface between two eNBs. 5.3 UDP/IP The path 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 IP
34、v6 (IETF RFC 2460 5) and/or IPv4 (IETF RFC 791 6). There may 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
35、particular E-RAB. The packet processing function in the source 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 ei
36、ther a) 32 bits in case of IPv4 address according to IETF RFC 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 Dif
37、fserv code points shall be configurable by O - The DL data stream 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 t
38、o the SeNB IP address (received in X2AP) associated to the DL 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; -
39、 data forwarding may be performed by MeNB providing GTP-U TEID to receive the DL data forwarded by the SeNB. ETSI ETSI TS 136 424 V14.0.0 (2017-04)83GPP TS 36.424 version 14.0.0 Release 14Annex A (informative): Change history TSG # TSG Doc. CR Rev Subject/Comment New 38 approved at TSG-RAN and place
40、d under change control 8.0.0 39 RP-080078 0001 - Editorial correction 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
41、 X2 transport bearers 8.3.0 42 RP-080845 0007 Correction of SAE 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 Refer
42、ences (TS 21.801 CR#0030) 10.0.1 52 RP-110684 0009 Correction 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 T
43、ransmission 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 Change history Date Meeting TDoc CR Rev Cat Subject/Comment New version 2017-03 SA#75 Promotion to Release 14 without technical change 14.0.0 ETSI ETSI TS 136 424 V14.0.0 (2017-04)93GPP TS 36.424 version 14.0.0 Release 14History Document history V14.0.0 April 2017 Publication
