The technology disclosed herein concerns, e.g., apparatus, methods, and procedures for generating, transmitting, and processing a combined message that both indicates RAN-based notification area update (RNAU) and a system information request. A user equipment (36-16) which communicates over a radio interface with an access node (22-16) of a radio access network (RAN) comprises receiver circuitry (46), processor circuitry (40), and transmitter circuitry (44). The receiver circuitry (46) is configured to receive first type system information (SI) from the access node (22-16). The first type system information comprises: scheduling information specifying downlink radio resources for second type SI message(s), each of the second type SI message(s) comprising at least one system information block (SIB), and an indication of a delivery mode for each of the second type SI message(s), the delivery mode being either periodic broadcast or on-demand basis. The processor circuitry (40) is configured to generate, in a case that the user equipment is in an inactive state, a request message for both initiating a RAN-based area update (RNAU) procedure and requesting transmission of at least one second type SI message. The transmitter circuitry (44) is configured to transmit the request message.