8.1 List of E1AP Elementary Procedures

37.4833GPPE1 Application Protocol (E1AP)Release 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

In the following tables, all EPs are divided into Class 1 and Class 2 EPs (see subclause 3.1 for explanation of the different classes):

Table 1: Class 1 procedures

Elementary Procedure	Initiating Message	Successful Outcome	Unsuccessful Outcome
		Response message	Response message
Reset	RESET	RESET ACKNOWLEDGE
gNB-CU-UP E1 Setup	GNB-CU-UP E1 SETUP REQUEST	GNB-CU-UP E1 SETUP RESPONSE	GNB-CU-UP E1 SETUP FAILURE
gNB-CU-CP E1 Setup	GNB-CU-CP E1 SETUP REQUEST	GNB-CU-CP E1 SETUP RESPONSE	GNB-CU-CP E1 SETUP FAILURE
gNB-CU-UP Configuration Update	GNB-CU-UP CONFIGURATION UPDATE	GNB-CU-UP CONFIGURATION UPDATE ACKNOWLEDGE	GNB-CU-UP CONFIGURATION UPDATE FAILURE
gNB-CU-CP Configuration Update	GNB-CU-CP CONFIGURATION UPDATE	GNB-CU-CP CONFIGURATION UPDATE ACKNOWLEDGE	GNB-CU-CP CONFIGURATION UPDATE FAILURE
E1 Release	E1 RELEASE REQUEST	E1 RELEASE RESPONSE
Bearer Context Setup	BEARER CONTEXT SETUP REQUEST	BEARER CONTEXT SETUP RESPONSE	BEARER CONTEXT SETUP FAILURE
Bearer Context Modification (gNB-CU-CP initiated)	BEARER CONTEXT MODIFICATION REQUEST	BEARER CONTEXT MODIFICATION RESPONSE	BEARER CONTEXT MODIFICATION FAILURE
Bearer Context Modification Required (gNB-CU-UP initiated)	BEARER CONTEXT MODIFICATION REQUIRED	BEARER CONTEXT MODIFICATION CONFIRM
Bearer Context Release (gNB-CU-CP initiated)	BEARER CONTEXT RELEASE COMMAND	BEARER CONTEXT RELEASE COMPLETE
Resource Status Reporting Initiation	RESOURCE STATUS REQUEST	RESOURCE STATUS RESPONSE	RESOURCE STATUS FAILURE
IAB UP TNL Address Update	IAB UP TNL ADDRESS UPDATE	IAB UP TNL ADDRESS UPDATE ACKNOWLEDGE	IAB UP TNL ADDRESS UPDATE FAILURE
BC Bearer Context Setup	BC BEARER CONTEXT SETUP REQUEST	BC BEARER CONTEXT SETUP RESPONSE	BC BEARER CONTEXT SETUP FAILURE
BC Bearer Context Modification (gNB-CU-CP initiated)	BC BEARER CONTEXT MODIFICATION REQUEST	BC BEARER CONTEXT MODIFICATION RESPONSE	BC BEARER CONTEXT MODIFICATION FAILURE
BC Bearer Context Modification Required (gNB-CU-UP initiated)	BC BEARER CONTEXT MODIFICATION REQUIRED	BC BEARER CONTEXT MODIFICATION CONFIRM
BC Bearer Context Release (gNB-CU-CP initiated)	BC BEARER CONTEXT RELEASE COMMAND	BC BEARER CONTEXT RELEASE COMPLETE
MC Bearer Context Setup	MC BEARER CONTEXT SETUP REQUEST	MC BEARER CONTEXT SETUP RESPONSE	MC BEARER CONTEXT SETUP FAILURE
MC Bearer Context Modification (gNB-CU-CP initiated)	MC BEARER CONTEXT MODIFICATION REQUEST	MC BEARER CONTEXT MODIFICATION RESPONSE	MC BEARER CONTEXT MODIFICATION FAILURE
MC Bearer Context Modification Required (gNB-CU-UP initiated)	MC BEARER CONTEXT MODIFICATION REQUIRED	MC BEARER CONTEXT MODIFICATION CONFIRM
MC Bearer Context Release (gNB-CU-CP initiated)	MC BEARER CONTEXT RELEASE COMMAND	MC BEARER CONTEXT RELEASE COMPLETE

Table 2: Class 2 procedures

Elementary Procedure			Message
Error Indication			ERROR INDICATION
Bearer Context Release Request (gNB-CU-UP initiated)			BEARER CONTEXT RELEASE REQUEST
Bearer Context Inactivity Notification			BEARER CONTEXT INACTIVITY NOTIFICATION
DL Data Notification			DL DATA NOTIFICATION
UL Data Notification			UL DATA NOTIFICATION
Data Usage Report			DATA USAGE REPORT
gNB-CU-UP Counter Check			GNB-CU-UP COUNTER CHECK
gNB-CU-UP Status Indication			GNB-CU-UP STATUS INDICATION
MR-DC Data Usage Report			MR-DC DATA USAGE REPORT
Trace Start			TRACE START
Deactivate Trace			DEACTIVATE TRACE
Resource Status Reporting			RESOURCE STATUS UPDATE
Early Forwarding SN Transfer			EARLY FORWARDING SN TRANSFER
GNB-CU-CP Measurement Results Information			GNB-CU-CP MEASUREMENT RESULTS INFORMATION
IAB PSK Notification			IAB PSK NOTIFICATION
BC Bearer Context Release (gNB-CU-UP initiated)			BC BEARER CONTEXT RELEASE REQUEST
BC Bearer Context Release (gNB-CU-UP initiated)			BC BEARER CONTEXT RELEASE REQUEST