The present document specifies the standards for user data
transport protocols and related signalling protocols to
establish user plane transport bearers over 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 interconnection a gNB-CU
and a gNB-DU of an en-gNB within an E-UTRAN.