Patent ID: 8902783

Claim:
A communication system configured to comprise: a communication control device which acquires, from a mobile device, access point information indicating an access point that is accessed when connecting to a communication network and which controls communication by the mobile device based on the access point information; and a memory configured to store a remaining communication volume that can be used by the mobile device to communicate through the access point indicated by the access point information in association with identification information capable of identifying a subscriber who uses the mobile device, wherein the communication control device includes first circuitry configured to: acquire the identification information and the access point information from the mobile device; acquire, based on the acquired identification information and the acquired access point information, a remaining communication volume of the mobile device, wherein the remaining communication volume is expressed as a remaining communication time during which communication can be performed or as a remaining data volume which can be communicated; measure a communication volume from a start of communication by the mobile device; calculate a remaining communication volume that can be used for communication by the mobile device based on the acquired remaining communication volume and the measured communication volume; determine whether or not communication by the mobile device can be continued based on the calculated remaining communication volume; extract access point information regarding an access point with an unused remaining communication volume when it is determined that communication by the mobile device cannot be continued; and report the extracted access point information to the mobile device, and the mobile device includes second circuitry configured to: acquire the access point information reported from the communication control device; and transmit the acquired access point information to the communication control device upon initiating a communication connection to the communication network.