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TS 38.423RAN3
NG-RAN — Xn interface –
Xn Application Protocol (XnAP)

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V16.0.0 (Wzip)2019/12  330 p.
V15.6.0 (PDF)2019/12  315 p.

WI Acronym:  NR_newRAT
Rapporteur:  Mr. Vesely, AlexanderEricsson LM

The present document specifies the radio network layer signalling procedures of the control plane between gNBs in NG RAN. XnAP supports the functions of Xn interface by signalling procedures defined in this document. XnAP is developed in accordance to the general principles stated in TS 38.401 and TS 38.420.

short Table of Contents for  TS 38.423  Word version:   16.0.0

each title links to the equivalent title in the full ToC
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1  ScopeWord-p. 11
2  ReferencesWord-p. 11
3  Definitions, symbols and abbreviationsWord-p. 12
4  GeneralWord-p. 13
5  XnAP servicesWord-p. 14
6  Services expected from signalling transportWord-p. 14
7  Functions of XnAPWord-p. 15
8  XnAP proceduresWord-p. 15
8.1  Elementary proceduresWord-p. 15
8.2  Basic mobility proceduresWord-p. 17
8.2.1  Handover PreparationWord-p. 17
8.2.2  SN Status TransferWord-p. 20
8.2.3  Handover CancelWord-p. 22
8.2.4  Retrieve UE ContextWord-p. 22
8.2.5  RAN PagingWord-p. 24
8.2.6  XN-U Address IndicationWord-p. 24
8.2.7  UE Context ReleaseWord-p. 26
8.3  Procedures for Dual ConnectivityWord-p. 27
8.3.1  S-NG-RAN node Addition PreparationWord-p. 27
8.3.2  S-NG-RAN node Reconfiguration CompletionWord-p. 32
8.3.3  M-NG-RAN node initiated S-NG-RAN node Modification PreparationWord-p. 33
8.3.4  S-NG-RAN node initiated S-NG-RAN node ModificationWord-p. 40
8.3.5  S-NG-RAN node initiated S-NG-RAN node ChangeWord-p. 43
8.3.6  M-NG-RAN node initiated S-NG-RAN node ReleaseWord-p. 44
8.3.7  S-NG-RAN node initiated S-NG-RAN node ReleaseWord-p. 46
8.3.8  S-NG-RAN node Counter CheckWord-p. 47
8.3.9  RRC TransferWord-p. 47
8.3.10  Notification Control IndicationWord-p. 48
8.3.11  Activity NotificationWord-p. 49
8.3.12  E-UTRA - NR Cell Resource CoordinationWord-p. 50
8.3.13  Secondary RAT Data Usage ReportWord-p. 52
8.3.14  Trace Start [R16]Word-p. 52
8.3.15  Deactivate Trace [R16]Word-p. 53
8.4  Global proceduresWord-p. 53
8.4.1  Xn SetupWord-p. 53
8.4.2  NG-RAN node Configuration UpdateWord-p. 56
8.4.3  Cell ActivationWord-p. 58
8.4.4  ResetWord-p. 60
8.4.5  Error IndicationWord-p. 61
8.4.6  Xn RemovalWord-p. 62
9  Elements for XnAP CommunicationWord-p. 63
9.0  GeneralWord-p. 63
9.1  Message Functional Definition and ContentWord-p. 63
9.1.1  Messages for Basic Mobility ProceduresWord-p. 63
9.1.2  Messages for Dual Connectivity ProceduresWord-p. 70
9.1.3  Messages for Global ProceduresWord-p. 99
9.2  Information Element definitionsWord-p. 110
9.2.0  GeneralWord-p. 110
9.2.1  Container and List IE definitionsWord-p. 110
9.2.2  NG-RAN Node and Cell Configuration related IE definitionsWord-p. 135
9.2.3  General IE definitionsWord-p. 160
9.3  Message and Information Element Abstract Syntax (with ASN.1)Word-p. 196
9.4  Message transfer syntaxWord-p. 327
9.5  TimersWord-p. 327
10  Handling of unknown, unforeseen and erroneous protocol dataWord-p. 327
A  Change historyWord-p. 328

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