message while the UE is in RRC_INACTIVE state, the last serving gNB may send the paging message in the cells cor- responding to the RNA and may send an XnAP RAN Paging to neighbor gNB(s), if the RNA includes the cells of neighbor gNB(s). Upon receiving the NG RESET message while the UE is in RRC_INACTIVE state, the last serving gNB may page the involved UE(s) in The purpose of the RAN Paging procedure is to enable the NG-RAN node to request paging of a UE in the NG-RAN node2. The procedure uses non-UE-associated signaling. The RAN paging procedure is triggered by the NG-RAN node by sending the RAN paging message to the NG-RAN node2, in which the necessary information such as UE RAN Paging identity is provided. New Radio Access Layer 2/3 Aspects and System Operation 249 the cells corresponding to the RNA and may send an XnAP RAN Paging to neighbor gNB (s), if the RNA includes the cells of neighbor gNB(s) [8]. The AMF provides to the NG-RAN node the CN assistance information to assist the NG-RAN node's decision on whether the UE can be moved to the RRC_INACTIVE state. The CN assistance information includes the registration area configured for the UE, the periodic registration update timer, and the UE identity index value, and may further include the UE-specific DRX, an indication if the UE is configured with mobile initiated connection only mode by the AMF, and the expected UE behavior. The UE registration area is consid- ered by the NG-RAN node, when configuring the RNA. The UE-specific DRX and UE identity index value are used by the NG-RAN node for RAN paging. The periodic registra- tion update timer is taken into account by the NG-RAN node to configure periodic RNA update timer. The NG-RAN node further considers the expected UE behavior to assist the UE RRC state transition decision [8]. During transition to RRC_INACTIVE state, the NG-RAN node may configure the UE with a periodic RNA update timer value. If the UE attempts to access a gNB other than the last serving gNB, the receiving gNB triggers the XnAP retrie