A method of operating a communication system includes: obtaining location information indicating a location of a private network and initial performance requirement information indicating initial performance requirements of the private network; obtaining, based on the location information and the initial performance requirement information, initial spectrum information indicating one or more initial licensed frequency bands and one or more initial unlicensed frequency bands; transmitting the initial spectrum information to an external device; obtaining updated performance requirement information indicating updated performance requirements of the private network; obtaining, based on the updated performance requirement information, updated spectrum information indicating one or more updated licensed frequency bands and one or more updated unlicensed frequency bands; and transmitting the updated spectrum information to the external device. An access point device of the private network transmits messages to client devices using frequency bands indicated by the initial spectrum information and the updated spectrum information.