US Patent 6907237 Communication system that provides backup communication services to a plurality of communication devices

A communication system that provides communication services to a plurality of communication devices over one or more wireless channels. The communication system includes a main system component that normally serves all of the plurality of the communication devices. However, when the main system component goes out of service, a backup system component only serves some of the communication devices. As such, backup service is provided in accordance with the service priority as subscribed by the communication devices.