The object of the present invention is to provide a radio access network system which can adapt to an environment in each network domain, and can carry out the priority transmission control of the IP packets in consideration of traffic requirements. The control apparatus 3 has a priority information setter configured to set priority information for determining a priority of the packet to be transferred in a transfer path set in the network, and a packet processor configured to determine the priority of the received packet in accordance with the priority information, and to add the priority to the received packet.