1、 ETSI TS 138 414 V15.0.0 (2018-07) 5G; NG-RAN; NG data transport (3GPP TS 38.414 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 138 414 V15.0.0 (2018-07)13GPP TS 38.414 version 15.0.0 Release 15Reference DTS/TSGR-0338414vf00 Keywords 5G ETSI 650 Route des Lucioles F-06921 Sophia Ant
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9、tentially 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 Essen
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13、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 3GPP identities, UMTS identities or GSM identi
14、ties. 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 present document “shall“, “shall not“, “should“, “s
15、hould 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 ETSI
16、 TS 138 414 V15.0.0 (2018-07)33GPP TS 38.414 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 6g34 Data Link Layer . 6g35 NG
17、Interface user plane protocol . 6g35.1 General . 6g35.2 GTP-U 6g35.3 UDP/IP . 6g35.4 Diffserv code point marking . 7g3Annex A (informative): Change history . 8g3History 9g3ETSI ETSI TS 138 414 V15.0.0 (2018-07)43GPP TS 38.414 version 15.0.0 Release 15Foreword This Technical Specification has been pr
18、oduced by the 3rdGeneration 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 TSG with an identifying c
19、hange 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 incremented for all changes of sub
20、stance, 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 138 414 V15.0.0 (2018-07)53GPP TS 38.414 version 15.0.0 Release 151 Scope The present document specifies the standards for
21、 user data transport protocols and related signalling protocols to establish user plane transport bearers over the NG interface. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. - References are either speci
22、fic (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 case of a reference to a 3GPP document (including a GSM document), a non-sp
23、ecific 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 23.501: “System Architecture for the 5G System; Stage 2“. 3 3GPP TS 29.281: “General Packet Radio System (GPRS) Tun
24、nelling Protocol User Plane (GTPv1-U)“. 4 IETF RFC 768 (1980-08): “User Datagram Protocol“. 5 IETF RFC 2460 (1998-12): “Internet Protocol, Version 6 (IPv6) Specification“. 6 IETF RFC 791 (1981-09): “Internet Protocol“. 7 IETF RFC 2474 (1998-12): “Definition of the Differentiated Services Field (DS F
25、ield) in the Ipv4 and Ipv6 Headers“. 8 3GPP TS 38.300: “NR and NG-RAN Overall Description Stage2“ 3 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 docum
26、ent takes precedence over the definition of the same term, if any, in 3GPP TR 21.905 1. gNB: as defined in TS 38.300 8. ng-eNB: as defined in TS 38.300 8. NG-RAN node: as defined in TS 38.300 8. NG-U: as defined in TS 38.300 8. PDU Session: as defined in TS 23.5012. ETSI ETSI TS 138 414 V15.0.0 (201
27、8-07)63GPP TS 38.414 version 15.0.0 Release 153.2 Abbreviations For the purposes of the 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 3GP
28、P TR 21.905 1. 5GC 5G Core 5QI 5G QoS Identifier AMF Access and Mobility Management Function GTP GPRS Tunnelling Protocol IP Internet Protocol NGAP NG Application Protocol TEID Tunnel Endpoint Identifier UDP User Datagram Protocol UPF User Plane Function 4 Data Link Layer Any data link protocol that
29、 fulfils the requirements toward the upper layer may be used. 5 NG Interface user plane protocol 5.1 General Both gNB and ng-eNB can be connected to 5GC over NG interface. The transport layer for data streams over NG is an IP based Transport. The following figure shows the transport protocol stacks
30、over NG. Figure 5.1: Transport network layer for data streams over NG The GTP-U (TS 29.281 3) protocol over UDP over IP shall be supported as the transport for data streams on the NG interface. The data link layer is as specified in clause 4. The transport bearer is identified by the GTP-U TEID (TS
31、29.281 3) and the IP address (source TEID, destination TEID, source IP address, destination IP address). 5.2 GTP-U The GTP-U (TS 29.281 3) protocol shall be used over the NG-U interface toward the 5GC. 5.3 UDP/IP The path protocol used shall be UDP (IETF RFC 768 4). The UDP port number for GTP-U sha
32、ll be as defined in TS 29.281 3. The NG-RAN node and the 5GC shall support fragmentation and assembly of GTP packets at the IP layer. GTP-U UDP IPv6 (RFC 2460) and/or IPv4 (RFC 791) Data link layer Physical layer ETSI ETSI TS 138 414 V15.0.0 (2018-07)73GPP TS 38.414 version 15.0.0 Release 15The NG-R
33、AN node and the 5GC shall support IPv6 (IETF RFC 2460 5) and/or IPv4 (IETF RFC 791 6). There may be one or several IP addresses in the NG-RAN node and in the 5GC. The packet processing function in the 5GC shall send downstream packets of a given PDU Session to the NG-RAN node IP address (received in
34、 NGAP) associated to that particular PDU Session. The packet processing function in the NG-RAN node shall send upstream packets of a given PDU Session to the 5GC IP address (received in NGAP) associated to that particular PDU Session. The Transport Layer Address signalled in NGAP messages is a bitst
35、ring of 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; or c) 160 bits if both IPv4 and IPv6 addresses are signalled, in which case the IPv4 address is contained in the first 32 bits. 5.4 Diffserv code point marking
36、 IP Differentiated Services code point marking (IETF RFC 2474 7) shall be supported. The mapping between traffic categories and Diffserv code points shall be configurable by O&M based on 5QI characteristics and other NG-RAN traffic parameters. Traffic categories are implementation-specific and may b
37、e determined from the application parameters. ETSI ETSI TS 138 414 V15.0.0 (2018-07)83GPP TS 38.414 version 15.0.0 Release 15Annex A (informative): Change history Change history Date Meeting TDoc CR Rev Cat Subject/Comment New version May 2017 RAN3#96 R3-171514 Initial DraftTS endorsed 0.0.2 October
38、 2017 RAN3#97bis R3-174240 Update some texts due to new 5G terminologies Add up “Diffserv code point marking“ 0.3.0 January 2018 RAN3-adhoc1801 Incorporate agreed TPs from RAN3-adhoc1801 0.4.0 May 2018 RAN3#100 R3-182642 Covering agreements of RAN3#100 0.5.0 06-2018 RP-80 RP-180787 - - - Presentation to RAN for approval 1.0.0 06-2018 RP-80 - - - Specification approved at TSG-RAN and placed under change control 15.0.0 ETSI ETSI TS 138 414 V15.0.0 (2018-07)93GPP TS 38.414 version 15.0.0 Release 15History Document history V15.0.0 July 2018 Publication
