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TS 38.473 (RAN3)
NG-RAN — F1 interface –
F1 Application Protocol (F1AP)

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V15.7.0 (PDF)2019/09  222 p.

Rapporteur:  Mr. Olofsson, Henrik

The present document specifies the 5G radio network layer signalling protocol for the F1 interface. The F1 interface provides means for interconnecting a gNB‑CU and a gNB‑DU of a gNB within an NG‑RAN, or for interconnecting a gNB‑CU and a gNB‑DU of an en‑gNB within an E‑UTRAN. The F1 Application Protocol (F1AP) supports the functions of F1 interface by signalling procedures defined in this document. F1AP is developed in accordance to the general principles stated in TS 38.401 and TS 38.470.

full Table of Contents for  TS 38.473  Word version:   15.7.0


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1  ScopeWord-p. 10
2  References
3  Definitions and abbreviationsWord-p. 11
4  General
5  F1AP services
6  Services expected from signalling transportWord-p. 14
7  Functions of F1AP
8  F1AP procedures
8.1  List of F1AP Elementary procedures
8.2  Interface Management proceduresWord-p. 15
8.3  UE Context Management procedures
8.4  RRC Message Transfer procedures
8.5  Warning Message Transmission Procedures
8.6  System Information Procedures
8.7  Paging procedures
9  Elements for F1AP CommunicationWord-p. 48
9.1  General
9.2  Message Functional Definition and Content
9.2.1  Interface Management messages
9.2.2  UE Context Management messages
9.2.3  RRC Message Transfer messagesWord-p. 82
9.2.4  Warning Message Transmission Messages
9.2.5  System Information messagesWord-p. 89
9.2.6  Paging messages
9.3  Information Element DefinitionsWord-p. 90
9.3.1  Radio Network Layer Related IEs  Message Type  CauseUp  Criticality DiagnosticsWord-p. 92  gNB-CU UE F1AP ID  gNB-DU UE F1AP IDWord-p. 93  RRC-Container  SRB ID  DRB ID  gNB-DU ID  Served Cell InformationWord-p. 94  Transmission Action IndicatorWord-p. 96  NR CGIUp  Time To wait  PLMN Identity  Transmission BandwidthWord-p. 97  NR Frequency Info  gNB-DU System InformationWord-p. 98  E-UTRAN QoS  Allocation and Retention PriorityWord-p. 99  GBR QoS Information  Bit RateWord-p. 100  Transaction IDUp  DRX Cycle  CU to DU RRC InformationWord-p. 101  DU to CU RRC InformationWord-p. 102  RLC ModeWord-p. 104  SUL Information  5GS TAC  Configured EPS TACWord-p. 105  RRC Reconfiguration Complete Indicator  UL Configuration  C-RNTIUp  Cell UL Configured  RAT-Frequency Priority InformationWord-p. 106  LCID  Duplication activation  Slice Support List  S-NSSAI  UE Identity Index valueWord-p. 107  Paging DRX  Paging Priority  gNB-CU System InformationUp  RAN UE Paging identity  CN UE Paging IdentityWord-p. 108  QoS Flow Level QoS Parameters  GBR QoS Flow Information  Dynamic 5QI DescriptorWord-p. 109  NG-RAN Allocation and Retention Priority  Non Dynamic 5QI DescriptorWord-p. 110  Maximum Packet Loss RateWord-p. 111  Packet Delay Budget  Packet Error RateUp  Averaging Window  Maximum Data Burst VolumeWord-p. 112  Masked IMEISV  Notification Control  RAN Area Code  PWS System Information  Repetition PeriodWord-p. 113  Number of Broadcasts Requested  SIType List  QoS Flow IdentifierWord-p. 114  Served E-UTRA Cell Information  Available PLMN List  RLC Failure Indication  Uplink TxDirectCurrentList Information  Service StatusWord-p. 115  RLC Status  RRC Version  RRC Delivery Status  QoS Flow Mapping IndicationWord-p. 116  Resource Coordination Transfer InformationUp  E-UTRA PRACH Configuration  Resource Coordination E-UTRA Cell Information  Extended Available PLMN ListWord-p. 118  Associated SCell List  Cell Direction  Paging Origin  E-UTRA Transmission Bandwidth  Message IdentifierWord-p. 119  Serial Number  UAC Assistance InformationWord-p. 120  UAC Action  UAC reduction IndicationWord-p. 121  Additional SIB Message List  Cell Type
9.3.2  Transport Network Layer Related IEs
9.4  Message and Information Element Abstract Syntax (with ASN.1)Up
9.5  Message Transfer SyntaxWord-p. 218
9.6  TimersUp
10  Handling of unknown, unforeseen and erroneous protocol data
A  Change HistoryWord-p. 219

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