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

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V16.0.0 (Wzip)  2019/12  239 p.
V15.8.0 (PDF)  2019/12  224 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:   16.0.0

Here   Top
1 Scope  2 References  3 Definitions and abbreviations  4 General  5 F1AP services  6 Services expected from signalling transport  7 Functions of F1AP  8 F1AP procedures  8.1 List of F1AP Elementary procedures  8.2 Interface Management procedures  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  8.8 Trace Procedures  8.9 Radio Information Transfer procedures  9 Elements for F1AP Communication  9.1 General  9.2 Message Functional Definition and Content  9.3 Information Element Definitions  9.4 Message and Information Element Abstract Syntax (with ASN.1)  9.5 Message Transfer Syntax  9.6 Timers  10 Handling of unknown, unforeseen and erroneous protocol data  A Change History 

 

1  Scope  Word-p. 10
2  References
3  Definitions and abbreviations  Word-p. 11
3.1  Definitions
3.2  Abbreviations  Word-p. 12
4  General
4.1  Procedure specification principles
4.2  Forwards and backwards compatibility  Word-p. 13
4.3  Specification notations
5  F1AP services
6  Services expected from signalling transport  Word-p. 14
7  Functions of F1AP
8  F1AP procedures
8.1  List of F1AP Elementary procedures
8.2  Interface Management procedures  Word-p. 15
8.2.1  Reset
8.2.1.1  General
8.2.1.2  Successful Operation  Word-p. 16
8.2.1.2.1  Reset Procedure Initiated from the gNB-CU
8.2.1.2.2  Reset Procedure Initiated from the gNB-DU  Word-p. 17
8.2.1.3  Abnormal Conditions  Up
8.2.2  Error Indication  Word-p. 18
8.2.2.1  General
8.2.2.2  Successful Operation
8.2.2.3  Abnormal Conditions
8.2.3  F1 Setup
8.2.3.1  General
8.2.3.2  Successful Operation  Word-p. 19
8.2.3.3  Unsuccessful Operation  Word-p. 20
8.2.3.4  Abnormal Conditions
8.2.4  gNB-DU Configuration Update  Up
8.2.4.1  General
8.2.4.2  Successful Operation
8.2.4.3  Unsuccessful Operation  Word-p. 22
8.2.4.4  Abnormal Conditions
8.2.5  gNB-CU Configuration Update
8.2.5.1  General
8.2.5.2  Successful Operation  Word-p. 23
8.2.5.3  Unsuccessful Operation  Word-p. 24
8.2.5.4  Abnormal Conditions  Word-p. 25
8.2.6  gNB-DU Resource Coordination  Up
8.2.6.1  General
8.2.6.2  Successful Operation
8.2.7  gNB-DU Status Indication
8.2.7.1  General
8.2.7.2  Successful Operation  Word-p. 26
8.2.7.3  Abnormal Conditions
8.2.8  F1 Removal
8.2.8.1  General
8.2.8.2  Successful Operation
8.2.8.3  Unsuccessful Operation  Word-p. 27
8.2.8.4  Abnormal Conditions  Word-p. 28
8.2.9  Network Access Rate Reduction
8.2.9.1  General
8.2.9.2  Successful operation
8.2.9.3  Abnormal Conditions
8.3  UE Context Management procedures
8.3.1  UE Context Setup
8.3.1.1  General
8.3.1.2  Successful Operation  Word-p. 29
8.3.1.3  Unsuccessful Operation  Word-p. 32
8.3.1.4  Abnormal Conditions
8.3.2  UE Context Release Request (gNB-DU initiated)
8.3.2.1  General
8.3.2.2  Successful Operation  Word-p. 33
8.3.2.3  Abnormal Conditions
8.3.3  UE Context Release (gNB-CU initiated)
8.3.3.1  General
8.3.3.2  Successful Operation
8.3.3.4  Abnormal Conditions  Word-p. 34
8.3.4  UE Context Modification (gNB-CU initiated)  Up
8.3.4.1  General
8.3.4.2  Successful Operation
8.3.4.3  Unsuccessful Operation  Word-p. 38
8.3.4.4  Abnormal Conditions
8.3.5  UE Context Modification Required (gNB-DU initiated)  Word-p. 39
8.3.5.1  General
8.3.5.2  Successful Operation
8.3.5.2A  Unsuccessful Operation  Word-p. 40
8.3.5.3  Abnormal Conditions
8.3.6  UE Inactivity Notification  Up
8.3.6.1  General
8.3.6.2  Successful Operation
8.3.6.3  Abnormal Conditions  Word-p. 41
8.3.7  Notify
8.3.7.1  General
8.3.7.2  Successful Operation
8.3.7.3  Abnormal Conditions
8.4  RRC Message Transfer procedures
8.4.1  Initial UL RRC Message Transfer
8.4.1.1  General  Up
8.4.1.2  Successful operation  Word-p. 42
8.4.1.3  Abnormal Conditions
8.4.2  DL RRC Message Transfer
8.4.2.1  General
8.4.2.2  Successful operation
8.4.2.3  Abnormal Conditions  Word-p. 43
8.4.3  UL RRC Message Transfer
8.4.3.1  General
8.4.3.2  Successful operation
8.4.3.3  Abnormal Conditions  Word-p. 44
8.4.4  RRC Delivery Report
8.4.4.1  General
8.4.4.2  Successful operation
8.4.4.3  Abnormal Conditions
8.5  Warning Message Transmission Procedures
8.5.1  Write-Replace Warning
8.5.1.1  General
8.5.1.2  Successful Operation  Word-p. 45
8.5.1.3  Unsuccessful Operation
8.5.1.4  Abnormal Conditions  Up
8.5.2  PWS Cancel
8.5.2.1  General
8.5.2.2  Successful Operation  Word-p. 46
8.5.2.3  Unsuccessful Operation
8.5.3  PWS Restart Indication
8.5.3.1  General
8.5.3.2  Successful Operation  Word-p. 47
8.5.3.3  Abnormal Conditions
8.5.4  PWS Failure Indication
8.5.4.1  General  Up
8.5.4.2  Successful Operation
8.5.4.3  Abnormal Conditions
8.6  System Information Procedures
8.6.1  System Information Delivery
8.6.1.1  General
8.6.1.2  Successful Operation  Word-p. 48
8.6.1.3  Abnormal Conditions
8.7  Paging procedures
8.7.1  Paging
8.7.1.1  General  Up
8.7.1.2  Successful Operation
8.7.1.3  Abnormal Conditions  Word-p. 49
8.8  Trace Procedures [R16]
8.8.1  Trace Start
8.8.1.1  General
8.8.1.2  Successful Operation
8.8.1.3  Abnormal Conditions
8.8.2  Deactivate Trace
8.8.2.1  General
8.8.2.2  Successful Operation  Word-p. 50
8.8.2.3  Abnormal Conditions
8.9  Radio Information Transfer procedures [R16]
8.9.1  DU-CU Radio Information Transfer
8.9.1.1  General
8.9.1.2  Successful operation
8.9.1.3  Abnormal Conditions
8.9.2  CU-DU Radio Information Transfer  Word-p. 51
8.9.2.1  General
8.9.2.2  Successful operation
8.9.2.3  Abnormal Conditions  Up
9  Elements for F1AP Communication
9.1  General
9.2  Message Functional Definition and Content  Word-p. 52
9.2.1  Interface Management messages
9.2.1.1  RESET
9.2.1.2  RESET ACKNOWLEDGE
9.2.1.3  ERROR INDICATION  Word-p. 53
9.2.1.4  F1 SETUP REQUEST
9.2.1.5  F1 SETUP RESPONSE  Word-p. 54
9.2.1.6  F1 SETUP FAILURE  Word-p. 55
9.2.1.7  GNB-DU CONFIGURATION UPDATE
9.2.1.8  GNB-DU CONFIGURATION UPDATE ACKNOWLEDGE  Word-p. 57
9.2.1.9  GNB-DU CONFIGURATION UPDATE FAILURE  Word-p. 58
9.2.1.10  GNB-CU CONFIGURATION UPDATE
9.2.1.11  GNB-CU CONFIGURATION UPDATE ACKNOWLEDGE  Word-p. 61
9.2.1.12  GNB-CU CONFIGURATION UPDATE FAILURE  Word-p. 62
9.2.1.13  GNB-DU RESOURCE COORDINATION REQUEST  Word-p. 63
9.2.1.14  GNB-DU RESOURCE COORDINATION RESPONSE
9.2.1.15  GNB-DU STATUS INDICATION  Word-p. 64
9.2.1.16  F1 REMOVAL REQUEST  Up
9.2.1.17  F1 REMOVAL RESPONSE
9.2.1.18  F1 REMOVAL FAILURE
9.2.1.19  NETWORK ACCESS RATE REDUCTION
9.2.2  UE Context Management messages  Word-p. 65
9.2.2.1  UE CONTEXT SETUP REQUEST
9.2.2.2  UE CONTEXT SETUP RESPONSE  Word-p. 68
9.2.2.3  UE CONTEXT SETUP FAILURE  Word-p. 70
9.2.2.4  UE CONTEXT RELEASE REQUEST  Word-p. 71
9.2.2.5  UE CONTEXT RELEASE COMMAND
9.2.2.6  UE CONTEXT RELEASE COMPLETE  Up
9.2.2.7  UE CONTEXT MODIFICATION REQUEST  Word-p. 72
9.2.2.8  UE CONTEXT MODIFICATION RESPONSE  Word-p. 77
9.2.2.9  UE CONTEXT MODIFICATION FAILURE  Word-p. 80
9.2.2.10  UE CONTEXT MODIFICATION REQUIRED
9.2.2.11  UE CONTEXT MODIFICATION CONFIRM  Word-p. 82
9.2.2.11A  UE CONTEXT MODIFICATION REFUSE  Word-p. 83
9.2.2.12  UE INACTIVITY NOTIFICATION  Word-p. 84
9.2.2.13  NOTIFY
9.2.3  RRC Message Transfer messages  Word-p. 85
9.2.3.1  INITIAL UL RRC MESSAGE TRANSFER  Up
9.2.3.2  DL RRC MESSAGE TRANSFER  Word-p. 86
9.2.3.3  UL RRC MESSAGE TRANSFER  Word-p. 87
9.2.3.4  RRC DELIVERY REPORT
9.2.4  Warning Message Transmission Messages
9.2.4.1  WRITE-REPLACE WARNING REQUEST
9.2.4.2  WRITE-REPLACE WARNING RESPONSE  Word-p. 88
9.2.4.3  PWS CANCEL REQUEST  Word-p. 89
9.2.4.4  PWS CANCEL RESPONSE  Word-p. 90
9.2.4.5  PWS RESTART INDICATION  Word-p. 91
9.2.4.6  PWS FAILURE INDICATION  Word-p. 92
9.2.5  System Information messages
9.2.5.1  SYSTEM INFORMATION DELIVERY COMMAND
9.2.6  Paging messages
9.2.6.1  PAGING
9.2.7  Trace Messages [R16]  Word-p. 93
9.2.7.1  TRACE START
9.2.7.2  DEACTIVATE TRACE
9.2.8  Radio Information Transfer messages [R16]  Word-p. 94
9.2.8.1  DU-CU RADIO INFORMATION TRANSFER
9.2.8.2  CU-DU RADIO INFORMATION TRANSFER  Up
9.3  Information Element Definitions
9.3.1  Radio Network Layer Related IEs
9.3.1.1  Message Type
9.3.1.2  Cause
9.3.1.3  Criticality Diagnostics  Word-p. 97
9.3.1.4  gNB-CU UE F1AP ID
9.3.1.5  gNB-DU UE F1AP ID  Word-p. 98
9.3.1.6  RRC-Container
9.3.1.7  SRB ID
9.3.1.8  DRB ID  Up
9.3.1.9  gNB-DU ID
9.3.1.10  Served Cell Information
9.3.1.11  Transmission Action Indicator  Word-p. 100
9.3.1.12  NR CGI
9.3.1.13  Time To wait  Word-p. 101
9.3.1.14  PLMN Identity
9.3.1.15  Transmission Bandwidth
9.3.1.16  Void
9.3.1.17  NR Frequency Info
9.3.1.18  gNB-DU System Information  Word-p. 102
9.3.1.19  E-UTRAN QoS  Up
9.3.1.20  Allocation and Retention Priority  Word-p. 103
9.3.1.21  GBR QoS Information
9.3.1.22  Bit Rate  Word-p. 104
9.3.1.23  Transaction ID
9.3.1.24  DRX Cycle
9.3.1.25  CU to DU RRC Information  Word-p. 105
9.3.1.26  DU to CU RRC Information  Word-p. 106
9.3.1.27  RLC Mode  Word-p. 108
9.3.1.28  SUL Information
9.3.1.29  5GS TAC  Up
9.3.1.29a  Configured EPS TAC  Word-p. 109
9.3.1.30  RRC Reconfiguration Complete Indicator
9.3.1.31  UL Configuration
9.3.1.32  C-RNTI
9.3.1.33  Cell UL Configured
9.3.1.34  RAT-Frequency Priority Information  Word-p. 110
9.3.1.35  LCID
9.3.1.36  Duplication activation
9.3.1.37  Slice Support List
9.3.1.38  S-NSSAI  Up
9.3.1.39  UE Identity Index value  Word-p. 111
9.3.1.40  Paging DRX
9.3.1.41  Paging Priority
9.3.1.42  gNB-CU System Information
9.3.1.43  RAN UE Paging identity  Word-p. 112
9.3.1.44  CN UE Paging Identity
9.3.1.45  QoS Flow Level QoS Parameters
9.3.1.46  GBR QoS Flow Information  Word-p. 113
9.3.1.47  Dynamic 5QI Descriptor
9.3.1.48  NG-RAN Allocation and Retention Priority  Word-p. 114
9.3.1.49  Non Dynamic 5QI Descriptor  Word-p. 115
9.3.1.50  Maximum Packet Loss Rate  Word-p. 116
9.3.1.51  Packet Delay Budget
9.3.1.52  Packet Error Rate
9.3.1.53  Averaging Window
9.3.1.54  Maximum Data Burst Volume  Word-p. 117
9.3.1.55  Masked IMEISV
9.3.1.56  Notification Control
9.3.1.57  RAN Area Code
9.3.1.58  PWS System Information  Up
9.3.1.59  Repetition Period  Word-p. 118
9.3.1.60  Number of Broadcasts Requested
9.3.1.61  Void
9.3.1.62  SIType List
9.3.1.63  QoS Flow Identifier  Word-p. 119
9.3.1.64  Served E-UTRA Cell Information
9.3.1.65  Available PLMN List
9.3.1.66  RLC Failure Indication
9.3.1.67  Uplink TxDirectCurrentList Information
9.3.1.68  Service Status  Word-p. 120
9.3.1.69  RLC Status  Up
9.3.1.70  RRC Version
9.3.1.71  RRC Delivery Status
9.3.1.72  QoS Flow Mapping Indication  Word-p. 121
9.3.1.73  Resource Coordination Transfer Information
9.3.1.74  E-UTRA PRACH Configuration
9.3.1.75  Resource Coordination E-UTRA Cell Information
9.3.1.76  Extended Available PLMN List  Word-p. 123
9.3.1.77  Associated SCell List
9.3.1.78  Cell Direction
9.3.1.79  Paging Origin  Up
9.3.1.80  E-UTRA Transmission Bandwidth
9.3.1.81  Message Identifier  Word-p. 124
9.3.1.82  Serial Number
9.3.1.83  UAC Assistance Information  Word-p. 125
9.3.1.84  UAC Action
9.3.1.85  UAC reduction Indication  Word-p. 126
9.3.1.86  Additional SIB Message List
9.3.1.87  Cell Type
9.3.1.88  Trace Activation [R16]
9.3.1.89  Intended TDD DL-UL Configuration [R16]  Word-p. 127
9.3.1.90  Additional RRM Policy Index [R16]  Word-p. 128
9.3.1.91  DU-CU RIM Information [R16]
9.3.1.92  CU-DU RIM Information [R16]  Word-p. 129
9.3.1.93  gNB Set ID [R16]
9.3.1.94  Lower Layer Presence Status Change [R16]
9.3.2  Transport Network Layer Related IEs  Word-p. 130
9.3.2.1  UP Transport Layer Information
9.3.2.2  GTP-TEID
9.3.2.3  Transport Layer Address
9.3.2.4  CP Transport Layer Information  Up
9.3.2.5  Transport Layer Addresses Info [R16]  Word-p. 131
9.4  Message and Information Element Abstract Syntax (with ASN.1)
9.4.1  General
9.4.2  Usage of private message mechanism for non-standard use  Word-p. 132
9.4.3  Elementary Procedure Definitions  Word-p. 133
9.4.4  PDU Definitions  Word-p. 141
9.4.5  Information Element Definitions  Word-p. 180
9.4.6  Common Definitions  Word-p. 223
9.4.7  Constant Definitions  Word-p. 224
9.4.8  Container Definitions  Word-p. 230
9.5  Message Transfer Syntax  Word-p. 235
9.6  Timers
10  Handling of unknown, unforeseen and erroneous protocol data
A  Change History  Word-p. 236

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