ETSI TS 138 473 V15.6.0 (2019-07)

ETSI TS 138 473 V15.6.0 (2019-07)






TECHNICAL SPECIFICATION
5G;
NG-RAN;
F1 Application Protocol (F1AP)
(3GPP TS 38.473 version 15.6.0 Release 15)

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3GPP TS 38.473 version 15.6.0 Release 15 1 ETSI TS 138 473 V15.6.0 (2019-07)



Reference
RTS/TSGR-0338473vf60
Keywords
5G
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3GPP TS 38.473 version 15.6.0 Release 15 2 ETSI TS 138 473 V15.6.0 (2019-07)
Intellectual Property Rights
Essential patents
IPRs 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 potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. 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.
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ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Legal Notice
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. These shall be
interpreted as being references to the corresponding ETSI deliverables.
The cross reference between 3GPP and ETSI identities can be found under http://webapp.etsi.org/key/queryform.asp.
Modal verbs terminology
In the present document "shall", "shall not", "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 citation.
ETSI

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3GPP TS 38.473 version 15.6.0 Release 15 3 ETSI TS 138 473 V15.6.0 (2019-07)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 9
1 Scope . 10
2 References . 10
3 Definitions and abbreviations . 11
3.1 Definitions . 11
3.2 Abbreviations . 12
4 General . 12
4.1 Procedure specification principles . 12
4.2 Forwards and backwards compatibility . 13
4.3 Specification notations . 13
5 F1AP services . 13
6 Services expected from signalling transport . 14
7 Functions of F1AP . 14
8 F1AP procedures . 14
8.1 List of F1AP Elementary procedures . 14
8.2 Interface Management procedures . 15
8.2.1 Reset . 15
8.2.1.1 General . 15
8.2.1.2 Successful Operation . 15
8.2.1.2.1 Reset Procedure Initiated from the gNB-CU . 15
8.2.1.2.2 Reset Procedure Initiated from the gNB-DU . 16
8.2.1.3 Abnormal Conditions . 17
8.2.2 Error Indication . 17
8.2.2.1 General . 17
8.2.2.2 Successful Operation . 17
8.2.2.3 Abnormal Conditions . 18
8.2.3 F1 Setup . 18
8.2.3.1 General . 18
8.2.3.2 Successful Operation . 18
8.2.3.3 Unsuccessful Operation . 19
8.2.3.4 Abnormal Conditions . 19
8.2.4 gNB-DU Configuration Update . 19
8.2.4.1 General . 19
8.2.4.2 Successful Operation . 20
8.2.4.3 Unsuccessful Operation . 21
8.2.4.4 Abnormal Conditions . 21
8.2.5 gNB-CU Configuration Update . 21
8.2.5.1 General . 21
8.2.5.2 Successful Operation . 22
8.2.5.3 Unsuccessful Operation . 23
8.2.5.4 Abnormal Conditions . 23
8.2.6 gNB-DU Resource Coordination . 23
8.2.6.1 General . 23
8.2.6.2 Successful Operation . 24
8.2.7 gNB-DU Status Indication . 24
8.2.7.1 General . 24
8.2.7.2 Successful Operation . 24
8.2.7.3 Abnormal Conditions . 24
ETSI

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3GPP TS 38.473 version 15.6.0 Release 15 4 ETSI TS 138 473 V15.6.0 (2019-07)
8.2.8 F1 Removal . 25
8.2.8.1 General . 25
8.2.8.2 Successful Operation . 25
8.2.8.3 Unsuccessful Operation . 26
8.2.8.4 Abnormal Conditions . 26
8.2.9 Network Access Rate Reduction . 26
8.2.9.1 General . 26
8.2.9.2 Successful operation. 27
8.2.9.3 Abnormal Conditions . 27
8.3 UE Context Management procedures . 27
8.3.1 UE Context Setup . 27
8.3.1.1 General . 27
8.3.1.2 Successful Operation . 27
8.3.1.3 Unsuccessful Operation . 30
8.3.1.4 Abnormal Conditions . 30
8.3.2 UE Context Release Request (gNB-DU initiated) . 31
8.3.2.1 General . 31
8.3.2.2 Successful Operation . 31
8.3.2.3 Abnormal Conditions . 31
8.3.3 UE Context Release (gNB-CU initiated) . 31
8.3.3.1 General . 31
8.3.3.2 Successful Operation . 32
8.3.3.4 Abnormal Conditions . 32
8.3.4 UE Context Modification (gNB-CU initiated) . 32
8.3.4.1 General . 32
8.3.4.2 Successful Operation . 32
8.3.4.3 Unsuccessful Operation . 36
8.3.4.4 Abnormal Conditions . 36
8.3.5 UE Context Modification Required (gNB-DU initiated) . 37
8.3.5.1 General . 37
8.3.5.2 Successful Operation . 37
8.3.5.2A Unsuccessful Operation . 38
8.3.5.3 Abnormal Conditions . 38
8.3.6 UE Inactivity Notification . 38
8.3.6.1 General . 38
8.3.6.2 Successful Operation . 38
8.3.6.3 Abnormal Conditions . 38
8.3.7 Notify . 39
8.3.7.1 General . 39
8.3.7.2 Successful Operation . 39
8.3.7.3 Abnormal Conditions . 39
8.4 RRC Message Transfer procedures . 39
8.4.1 Initial UL RRC Message Transfer . 39
8.4.1.1 General . 39
8.4.1.2 Successful operation. 40
8.4.1.3 Abnormal Conditions . 40
8.4.2 DL RRC Message Transfer . 40
8.4.2.1 General . 40
8.4.2.2 Successful operation. 40
8.4.2.3 Abnormal Conditions . 41
8.4.3 UL RRC Message Transfer . 41
8.4.3.1 General . 41
8.4.3.2 Successful operation. 41
8.4.3.3 Abnormal Conditions . 42
8.4.4 RRC Delivery Report. 42
8.4.4.1 General . 42
8.4.4.2 Successful operation. 42
8.4.4.3 Abnormal Conditions . 42
8.5 Warning Message Transmission Procedures . 42
8.5.1 Write-Replace Warning . 42
8.5.1.1 General . 42
8.5.1.2 Successful Operation . 43
ETSI

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3GPP TS 38.473 version 15.6.0 Release 15 5 ETSI TS 138 473 V15.6.0 (2019-07)
8.5.1.3 Unsuccessful Operation . 43
8.5.1.4 Abnormal Conditions . 43
8.5.2 PWS Cancel . 43
8.5.2.1 General . 43
8.5.2.2 Successful Operation . 44
8.5.1.3 Unsuccessful Operation . 44
8.5.3 PWS Restart Indication . 44
8.5.3.1 General . 44
8.5.3.2 Successful Operation . 44
8.5.3.3 Abnormal Conditions . 44
8.5.4 PWS Failure Indication . 45
8.5.4.1 General . 45
8.5.4.2 Successful Operation . 45
8.5.4.3 Abnormal Conditions . 45
8.6 System Information Procedures . 45
8.6.1 System Information Delivery . 45
8.6.1.1 General . 45
8.6.1.2 Successful Operation . 45
8.6.1.3 Abnormal Conditions . 46
8.7 Paging procedures . 46
8.7.1 Paging . 46
8.7.1.1 General . 46
8.7.1.2 Successful Operation . 46
8.7.1.3 Abnormal Conditions . 46
9 Elements for F1AP Communication . 47
9.1 General . 47
9.2 Message Functional Definition and Content . 47
9.2.1 Interface Management messages . 47
9.2.1.1 RESET . 47
9.2.1.2 RESET ACKNOWLEDGE . 48
9.2.1.3 ERROR INDICATION . 48
9.2.1.4 F1 SETUP REQUEST . 48
9.2.1.5 F1 SETUP RESPONSE . 49
9.2.1.6 F1 SETUP FAILURE . 50
9.2.1.7 GNB-DU CONFIGURATION UPDATE . 50
9.2.1.8 GNB-DU CONFIGURATION UPDATE ACKNOWLEDGE . 52
9.2.1.9 GNB-DU CONFIGURATION UPDATE FAILURE . 53
9.2.1.10 GNB-CU CONFIGURATION UPDATE . 53
9.2.1.11 GNB-CU CONFIGURATION UPDATE ACKNOWLEDGE . 56
9.2.1.12 GNB-CU CONFIGURATION UPDATE FAILURE . 57
9.2.1.13 GNB-DU RESOURCE COORDINATION REQUEST . 57
9.2.1.14 GNB-DU RESOURCE COORDINATION RESPONSE . 58
9.2.1.15 GNB-DU STATUS INDICATION . 58
9.2.1.16 F1 REMOVAL REQUEST . 59
9.2.1.17 F1 REMOVAL RESPONSE . 59
9.2.1.18 F1 REMOVAL FAILU
...