What is F1-AP (F1 application protocol)?

F1AP gives a signaling between gNB-DU and the gNB-CU whose administrations are isolated into non-UE-associated and UE-associated administrations. The F1AP is conveyed over SCTP. The F1AP protocol is characterized in TS 38.473. The non-UE-associated administrations are interconnected to the F1 interface and the UE-associated administrations are interconnected to one UE.