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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 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  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
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. 16
8.2.1.3  Abnormal Conditions  Word-p. 17
8.2.2  Error Indication
8.2.2.1  General
8.2.2.2  Successful Operation
8.2.2.3  Abnormal Conditions  Word-p. 18
8.2.3  F1 Setup
8.2.3.1  General
8.2.3.2  Successful Operation
8.2.3.3  Unsuccessful Operation  Word-p. 19
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  Word-p. 20
8.2.4.3  Unsuccessful Operation  Word-p. 21
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. 22
8.2.5.3  Unsuccessful Operation  Word-p. 23
8.2.5.4  Abnormal Conditions
8.2.6  gNB-DU Resource Coordination  Up
8.2.6.1  General
8.2.6.2  Successful Operation  Word-p. 24
8.2.7  gNB-DU Status Indication
8.2.7.1  General
8.2.7.2  Successful Operation
8.2.7.3  Abnormal Conditions
8.2.8  F1 Removal  Word-p. 25
8.2.8.1  General
8.2.8.2  Successful Operation
8.2.8.3  Unsuccessful Operation  Word-p. 26
8.2.8.4  Abnormal Conditions
8.2.9  Network Access Rate Reduction
8.2.9.1  General
8.2.9.2  Successful operation  Word-p. 27
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
8.3.1.3  Unsuccessful Operation  Word-p. 30
8.3.1.4  Abnormal Conditions
8.3.2  UE Context Release Request (gNB-DU initiated)  Word-p. 31
8.3.2.1  General
8.3.2.2  Successful Operation
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  Word-p. 32
8.3.3.4  Abnormal Conditions
8.3.4  UE Context Modification (gNB-CU initiated)  Up
8.3.4.1  General
8.3.4.2  Successful Operation  Word-p. 33
8.3.4.3  Unsuccessful Operation  Word-p. 37
8.3.4.4  Abnormal Conditions
8.3.5  UE Context Modification Required (gNB-DU initiated)
8.3.5.1  General
8.3.5.2  Successful Operation  Word-p. 38
8.3.5.2A  Unsuccessful Operation  Word-p. 39
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
8.3.7  Notify  Word-p. 40
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. 41
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. 42
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. 43
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. 44
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. 45
8.5.2.3  Unsuccessful Operation
8.5.3  PWS Restart Indication
8.5.3.1  General
8.5.3.2  Successful Operation
8.5.3.3  Abnormal Conditions
8.5.4  PWS Failure Indication  Word-p. 46
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
8.6.1.3  Abnormal Conditions  Word-p. 47
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
9  Elements for F1AP Communication  Word-p. 48
9.1  General
9.2  Message Functional Definition and Content
9.2.1  Interface Management messages
9.2.1.1  RESET
9.2.1.2  RESET ACKNOWLEDGE  Word-p. 49
9.2.1.3  ERROR INDICATION
9.2.1.4  F1 SETUP REQUEST  Up
9.2.1.5  F1 SETUP RESPONSE  Word-p. 50
9.2.1.6  F1 SETUP FAILURE  Word-p. 51
9.2.1.7  GNB-DU CONFIGURATION UPDATE
9.2.1.8  GNB-DU CONFIGURATION UPDATE ACKNOWLEDGE  Word-p. 53
9.2.1.9  GNB-DU CONFIGURATION UPDATE FAILURE  Word-p. 54
9.2.1.10  GNB-CU CONFIGURATION UPDATE
9.2.1.11  GNB-CU CONFIGURATION UPDATE ACKNOWLEDGE  Word-p. 57
9.2.1.12  GNB-CU CONFIGURATION UPDATE FAILURE  Word-p. 58
9.2.1.13  GNB-DU RESOURCE COORDINATION REQUEST
9.2.1.14  GNB-DU RESOURCE COORDINATION RESPONSE  Word-p. 59
9.2.1.15  GNB-DU STATUS INDICATION
9.2.1.16  F1 REMOVAL REQUEST  Word-p. 60
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
9.2.2.1  UE CONTEXT SETUP REQUEST
9.2.2.2  UE CONTEXT SETUP RESPONSE  Word-p. 64
9.2.2.3  UE CONTEXT SETUP FAILURE  Word-p. 66
9.2.2.4  UE CONTEXT RELEASE REQUEST  Word-p. 67
9.2.2.5  UE CONTEXT RELEASE COMMAND
9.2.2.6  UE CONTEXT RELEASE COMPLETE
9.2.2.7  UE CONTEXT MODIFICATION REQUEST  Word-p. 68
9.2.2.8  UE CONTEXT MODIFICATION RESPONSE  Word-p. 74
9.2.2.9  UE CONTEXT MODIFICATION FAILURE  Word-p. 77
9.2.2.10  UE CONTEXT MODIFICATION REQUIRED
9.2.2.11  UE CONTEXT MODIFICATION CONFIRM  Word-p. 79
9.2.2.11A  UE CONTEXT MODIFICATION REFUSE  Word-p. 81
9.2.2.12  UE INACTIVITY NOTIFICATION
9.2.2.13  NOTIFY  Up
9.2.3  RRC Message Transfer messages  Word-p. 82
9.2.3.1  INITIAL UL RRC MESSAGE TRANSFER
9.2.3.2  DL RRC MESSAGE TRANSFER  Word-p. 83
9.2.3.3  UL RRC MESSAGE TRANSFER  Word-p. 84
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. 85
9.2.4.3  PWS CANCEL REQUEST  Word-p. 86
9.2.4.4  PWS CANCEL RESPONSE  Word-p. 87
9.2.4.5  PWS RESTART INDICATION  Word-p. 88
9.2.4.6  PWS FAILURE INDICATION
9.2.5  System Information messages  Word-p. 89
9.2.5.1  SYSTEM INFORMATION DELIVERY COMMAND
9.2.6  Paging messages
9.2.6.1  PAGING
9.3  Information Element Definitions  Word-p. 90
9.3.1  Radio Network Layer Related IEs
9.3.1.1  Message Type
9.3.1.2  Cause  Up
9.3.1.3  Criticality Diagnostics  Word-p. 92
9.3.1.4  gNB-CU UE F1AP ID
9.3.1.5  gNB-DU UE F1AP ID  Word-p. 93
9.3.1.6  RRC-Container
9.3.1.7  SRB ID
9.3.1.8  DRB ID
9.3.1.9  gNB-DU ID
9.3.1.10  Served Cell Information  Word-p. 94
9.3.1.11  Transmission Action Indicator  Word-p. 96
9.3.1.12  NR CGI  Up
9.3.1.13  Time To wait
9.3.1.14  PLMN Identity
9.3.1.15  Transmission Bandwidth  Word-p. 97
9.3.1.16  Void
9.3.1.17  NR Frequency Info
9.3.1.18  gNB-DU System Information  Word-p. 98
9.3.1.19  E-UTRAN QoS
9.3.1.20  Allocation and Retention Priority  Word-p. 99
9.3.1.21  GBR QoS Information
9.3.1.22  Bit Rate  Word-p. 100
9.3.1.23  Transaction ID  Up
9.3.1.24  DRX Cycle
9.3.1.25  CU to DU RRC Information  Word-p. 101
9.3.1.26  DU to CU RRC Information  Word-p. 102
9.3.1.27  RLC Mode  Word-p. 104
9.3.1.28  SUL Information
9.3.1.29  5GS TAC
9.3.1.29a  Configured EPS TAC  Word-p. 105
9.3.1.30  RRC Reconfiguration Complete Indicator
9.3.1.31  UL Configuration
9.3.1.32  C-RNTI  Up
9.3.1.33  Cell UL Configured
9.3.1.34  RAT-Frequency Priority Information  Word-p. 106
9.3.1.35  LCID
9.3.1.36  Duplication activation
9.3.1.37  Slice Support List
9.3.1.38  S-NSSAI
9.3.1.39  UE Identity Index value  Word-p. 107
9.3.1.40  Paging DRX
9.3.1.41  Paging Priority
9.3.1.42  gNB-CU System Information  Up
9.3.1.43  RAN UE Paging identity
9.3.1.44  CN UE Paging Identity  Word-p. 108
9.3.1.45  QoS Flow Level QoS Parameters
9.3.1.46  GBR QoS Flow Information
9.3.1.47  Dynamic 5QI Descriptor  Word-p. 109
9.3.1.48  NG-RAN Allocation and Retention Priority
9.3.1.49  Non Dynamic 5QI Descriptor  Word-p. 110
9.3.1.50  Maximum Packet Loss Rate  Word-p. 111
9.3.1.51  Packet Delay Budget
9.3.1.52  Packet Error Rate  Up
9.3.1.53  Averaging Window
9.3.1.54  Maximum Data Burst Volume  Word-p. 112
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
9.3.1.59  Repetition Period  Word-p. 113
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. 114
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. 115
9.3.1.69  RLC Status
9.3.1.70  RRC Version
9.3.1.71  RRC Delivery Status
9.3.1.72  QoS Flow Mapping Indication  Word-p. 116
9.3.1.73  Resource Coordination Transfer Information  Up
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. 118
9.3.1.77  Associated SCell List
9.3.1.78  Cell Direction
9.3.1.79  Paging Origin
9.3.1.80  E-UTRA Transmission Bandwidth
9.3.1.81  Message Identifier  Word-p. 119
9.3.1.82  Serial Number
9.3.1.83  UAC Assistance Information  Word-p. 120
9.3.1.84  UAC Action
9.3.1.85  UAC reduction Indication  Word-p. 121
9.3.1.86  Additional SIB Message List
9.3.1.87  Cell Type
9.3.2  Transport Network Layer Related IEs
9.3.2.1  UP Transport Layer Information
9.3.2.2  GTP-TEID  Word-p. 122
9.3.2.3  Transport Layer Address
9.3.2.4  CP Transport Layer Information
9.4  Message and Information Element Abstract Syntax (with ASN.1)  Up
9.4.1  General
9.4.2  Usage of private message mechanism for non-standard use  Word-p. 123
9.4.3  Elementary Procedure Definitions  Word-p. 124
9.4.4  PDU Definitions  Word-p. 131
9.4.5  Information Element Definitions  Word-p. 167
9.4.6  Common Definitions  Word-p. 206
9.4.7  Constant Definitions  Word-p. 207
9.4.8  Container Definitions  Word-p. 213
9.5  Message Transfer Syntax  Word-p. 218
9.6  Timers  Up
10  Handling of unknown, unforeseen and erroneous protocol data
A  Change History  Word-p. 219

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