A radio manager unit for a radio access network, wherein the radio manager unit is configured to connect to a transport control unit configured to control a transport network between a baseband processing unit and a plurality of remote radio units. The radio manager unit is further configured to connect to a radio control unit configured to control the baseband processing unit. The radio manager unit is further configured to be connected to one or more tenant system of a tenant. The radio manager unit is configured to arrange for resources of the transport network and resources of the baseband processing unit to be configured for use by a said tenant.