ETSI TS 138 410-2018 5G NG-RAN NG general aspects and principles (V15 0 0 3GPP TS 38 410 version 15 0 0 Release 15).pdf

1、 ETSI TS 138 410 V15.0.0 (2018-07) 5G; NG-RAN; NG general aspects and principles (3GPP TS 38.410 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 138 410 V15.0.0 (2018-07)13GPP TS 38.410 version 15.0.0 Release 15Reference DTS/TSGR-0338410vf00 Keywords 5G ETSI 650 Route des Lucioles F-

2、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 downloaded from: http:/www.etsi.org/standards-sea

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8、he 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 138 410 V15.0.0 (2018-07)23GPP TS 38.410 version 15.0.0 Release 15Intellectual Property Rights Essential patents IPRs

9、 essential or potentially 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 p

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11、. 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. Trademarks The present document may include trademarks and/or tradenames which are asserted

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13、SI 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 3GPP identities, UMTS identiti

14、es 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 present document “shall“, “shall no

15、t“, “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 except when used in direct cit

16、ation. ETSI ETSI TS 138 410 V15.0.0 (2018-07)33GPP TS 38.410 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 . 5g34 General as

17、pects . 6g34.1 NG Architecture . 6g34.2 NG interface general principles 6g34.3 NG interface specification objectives . 6g34.4 NG interface capabilities 6g35 Functions of the NG interface 7g35.1 General . 7g35.2 Paging function 7g35.3 UE Context Management function . 7g35.4 Mobility Management functi

18、on 7g35.5 PDU Session Management function . 7g35.6 NAS Transport function . 7g35.7 NAS Node Selection function 7g35.8 NG Interface Management function . 7g35.9 Warning Message Transmission function 8g35.10 Configuration Transfer function . 8g35.11 Trace function 8g35.12 AMF Management function . 8g3

19、5.13 Multiple TNL Associations Support Function . 8g35.14 AMF Load Balancing function . 8g35.15 Location Reporting function. 8g35.16 AMF Re-allocation function. 8g36 Signalling procedures of the NG interface . 8g36.1 PDU Session Management Procedures 8g36.2 UE Context Management Procedures . 9g36.3

20、NAS transport procedures 9g36.4 UE Mobility Management Procedures . 9g36.5 Paging procedure 9g36.6 AMF Management procedures . 9g36.7 NG Interface Management procedures . 9g36.8 Warning message transmission procedures 10g36.9 Location Reporting procedures 10g37 NG interface protocol structure 10g37.

21、1 NG Control Plane . 10g37.2 NG User Plane 10g38 Other NG interface specifications 11g38.1 NG-RAN NG interface: NG layer 1 (TS 38.411) . 11g38.2 NG-RAN NG interface: NG signalling transport (TS 38.412) 11g38.3 NG-RAN NG interface: NG application protocol (NGAP) (TS 38.413) . 11g38.4 NG-RAN NG interf

22、ace: NG data transport (TS 38.414) 11g38.5 NG-RAN NG interface: NG PDU Session user plane protocol (TS 38.415) . 11g3Annex A (informative): Change history . 12g3History 13g3ETSI ETSI TS 138 410 V15.0.0 (2018-07)43GPP TS 38.410 version 15.0.0 Release 15Foreword This Technical Specification has been p

23、roduced 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

24、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 incremented for all changes of su

25、bstance, 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 138 410 V15.0.0 (2018-07)53GPP TS 38.410 version 15.0.0 Release 151 Scope The present document is an introduction to the

26、3GPP TS 38.41x series of technical specifications that define the NG interface for the interconnection of an NG-RAN node to the 5GC (5G Core Network). 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. - Refer

27、ences 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 case of a reference to a 3GPP document (including a G

28、SM 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 38.411: “NG-RAN; NG layer 1“. 3 3GPP TS 38.412: “NG-RAN; NG signalling transport“. 4 3GPP TS

29、38.413: “NG-RAN; NG Application Protocol (NGAP) “. 5 3GPP TS 38.414: “NG-RAN; NG data transport“. 6 3GPP TS 23.502: “Procedures for the 5G system“. 7 3GPP TS 38.300: “NR; Overall Description; Stage 2“. 8 3GPP TS 23.501: “System Architecture for the 5G system“. 9 3GPP TS 38.415: “PDU Session User Pla

30、ne Protocol“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in TR 21.905 1 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 1. gNB: a

31、s defined in TS 38.300 7. ng-eNB: as defined in TS 38.300 7. NG-RAN node: as defined in TS 38.300 7. UPF: as defined in TS 23.501 8. 3.2 Abbreviations For the purposes of the present document, the terms and definitions given in TR 21.905 1 and the following apply. A term defined in the present docum

32、ent takes precedence over the definition of the same term, if any, in TR 21.905 1. 5GC 5G Core Network AMF Access and Mobility Management Function SMF Session Management Function UPF User Plane Function ETSI ETSI TS 138 410 V15.0.0 (2018-07)63GPP TS 38.410 version 15.0.0 Release 154 General aspects

33、4.1 NG Architecture The NG-RAN is layered into a Radio Network Layer (RNL) and a Transport Network Layer (TNL). The NG-RAN architecture, i.e. the NG-RAN logical nodes and interfaces between them, are defined as part of the RNL. The NG-RAN architecture consists of a set of gNBs and ng-eNBs which are

34、connected to the 5GC through the NG interface and is specified in TS 38.300 7. The NG-RAN may have several NG access points towards the 5GC. As a minimum, each NG access point (in NG-RAN or 5GC) shall independently fulfil the requirements of the relevant NG specifications (3GPP 38.41x series - see c

35、lause 7). NG is a logical interface. There may be multiple NG-C logical interfaces towards the 5GC from any one NG-RAN node. The selection of the NG-C interface is then determined by the NAS Node Selection function as described in clause 5. There may be multiple NG-U logical interfaces towards the 5

36、GC from any one NG-RAN node. The selection of the NG-U interface is done within the 5GC and signalled to the NG-RAN node by the AMF. 4.2 NG interface general principles The general principles for the specification of the NG interface are as follows: - the NG interface is open; - the NG interface sup

37、ports the exchange of signalling information between the NG-RAN and 5GC; - from a logical standpoint, the NG is a point-to-point interface between an NG-RAN node and a 5GC node. A point-to-point logical interface is feasible even in the absence of a physical direct connection between the NG-RAN and

38、5GC; - the NG interface supports control plane and user plane separation; - the NG interface separates Radio Network Layer and Transport Network Layer; - the NG interface is future proof to fulfil different new requirements and support of new services and new functions; - the NG interface is decoupl

39、ed with the possible NG-RAN deployment variants; - the NG Application Protocol supports modular procedures design and uses a syntax allowing optimized encoding /decoding efficiency. 4.3 NG interface specification objectives The NG interface specification facilitates the following: - inter-connection

40、 of NG-RAN nodes with AMFs supplied by different manufacturers; - separation of NG interface Radio Network functionality and Transport Network functionality to facilitate introduction of future technology. 4.4 NG interface capabilities The NG interface supports: - procedures to establish, maintain a

41、nd release NG-RAN part of PDU sessions; - procedures to perform intra-RAT handover and inter-RAT handover; - the separation of each UE on the protocol level for user specific signalling management; ETSI ETSI TS 138 410 V15.0.0 (2018-07)73GPP TS 38.410 version 15.0.0 Release 15- the transfer of NAS s

42、ignalling messages between UE and AMF; - mechanisms for resource reservation for packet data streams. 5 Functions of the NG interface 5.1 General The following clauses describe the functions supported over the NG interface. 5.2 Paging function The paging function supports the sending of paging reque

43、sts to the NG-RAN nodes involved in the paging area e.g. the NG-RAN nodes of the TA(s) the UE is registered. 5.3 UE Context Management function The UE Context management function allows the AMF to establish, modify or release a UE Context in the AMF and the NG-RAN node e.g. to support user individua

44、l signalling on NG. 5.4 Mobility Management function The mobility function for UEs in ECM-CONNECTED includes the intra-system handover function to support mobility within NG-RAN and inter-system handover function to support mobility from/to EPS system. It comprises the preparation, execution and com

45、pletion of handover via the NG interface. 5.5 PDU Session Management function The PDU Session function is responsible for establishing, modifying and releasing the involved PDU sessions NG-RAN resources for user data transport once a UE context is available in the NG-RAN node. NGAP supports transpar

46、ent relaying of PDU Session related information by the AMF as described in TS 23.502 6. 5.6 NAS Transport function The NAS Signalling Transport function provides means to transport or reroute a NAS message (e.g. for NAS mobility management) for a specific UE over the NG interface. 5.7 NAS Node Selec

47、tion function The interconnection of NG-RAN nodes to multiple AMFs is supported in the 5GS architecture. Therefore, a NAS node selection function is located in the NG-RAN node to determine the AMF association of the UE, based on the UEs temporary identifier, which was assigned to the UE by the AMF.

48、When the UEs temporary identifier has not been yet assigned or is no longer valid the NG-RAN node may instead take into account slicing information to determine the AMF. This functionality is located in the NG-RAN node and enables proper routing via the NG interface. On NG, no specific procedure cor

49、responds to the NAS Node Selection Function. 5.8 NG Interface Management function The NG-interface management functions provide - means to ensure a defined start of NG-interface operation (reset); - means to handle different versions of application part implementations and protocol errors (error indication). ETSI ETSI TS 138 410 V15.0.0 (2018-07)83GPP TS 38.410 version 15.0.0 Release 155.9 Warning Message Transmission function The warning message transmission function provides means to transfer warning messages via NG interface or cancel