1. An apparatus of a Next Generation Node-B (gNB) with a control plane (CP)-user plane (UP) separation, the apparatus comprising:processing circuitry, wherein to configure the apparatus for communication with a User Equipment (UE) within a 5G new radio (NR) architecture using network slicing, the processing circuitry is to:
decode a radio resource control (RRC) request message from the UE, the RRC request message for establishing a connection between the UE and a user plane function (UPF) of the 5G NR architecture in a network slice;
in response to a confirmation message that the UE is authorized to communicate via the network slice, encode a Central Unit User plane (CU-UP) resource status request message for transmission by a Central Unit Control Plane (CU-CP) entity of the gNB to a plurality of CU-UP entities of the gNB;
decode at the CU-CP entity, a CU-UP resource status response message from each of the plurality of CU-UP entities, the resource status response message including resource availability information for the CU-UP entities; and
select by the CU-CP entity, a CU-UP entity from the plurality of CU-UP entities based on the resource availability information; and
memory coupled to the processing circuitry, the memory configured to store the resource availability information.