Communication system, service control device, and communication method

A service control device that, in a communication system including a communication control device calculating a communication volume of a mobile terminal, stores a charge remaining amount corresponding to a communication volume available to the mobile terminal, the service control device comprising:

• communication state storage means for storing information indicating a communication state of the mobile terminal,
• inquiry acceptance means for accepting an inquiry for the charge remaining amount of the mobile terminal,
• communication state determination means for determining whether the mobile terminal is in communication on the basis of the information stored in the communication state storage means,
• updated remaining amount acquisition means for acquiring the charge remaining amount updated in accordance with the communication volume calculated by the communication control device when the communication state determination means determines that the mobile terminal is in communication, and
• remaining amount notification means for notifying of the charge remaining amount of the mobile terminal in response to the inquiry that the inquiry acceptance means has accepted.

A communication method executed by a communication system including a communication control device that calculates a communication volume of a mobile terminal and a service control device that stores a charge remaining amount corresponding to a communication volume available to the mobile terminal, the communication method comprising:

• a communication state storage step of, by the service control device, storing information indicating a communication state of the mobile terminal,
• an inquiry acceptance step of, by the service control device, accepting an inquiry for the charge remaining amount of the mobile terminal,
• a communication state determination step of, by the service control device, determining whether the mobile terminal is in communication on the basis of the information stored in the communication state storage step,
• an updated remaining amount acquisition step of, by the service control device, acquiring the charge remaining amount updated in accordance with the communication volume calculated by the communication control device when it is determined that the mobile terminal is in communication in the communication state determination step, and
• a remaining amount notification step of, by the service control device, notifying of the charge remaining amount of the mobile terminal in response to the inquiry accepted in the inquiry acceptance step.

A communication system comprising:

• a communication control device that calculates a communication volume of a mobile terminal;
• and
• a service control device that stores a charge remaining amount corresponding to a communication volume available to the mobile terminal, wherein
• the service control device includes:
• a communication state storage unit configured to store information indicating a communication state of the mobile terminal,
• an inquiry acceptance unit configured to accept an inquiry for the charge remaining amount of the mobile terminal,
• a communication state determination unit configured to determine whether the mobile terminal is in communication on the basis of the information stored in the communication state storage unit,
• an updated remaining amount acquisition unit configured to acquire the charge remaining amount updated in accordance with the communication volume calculated by the communication control device when the communication state determination unit determines that the mobile terminal is in communication, and
• a remaining amount notification unit configured to notify of the charge remaining amount of the mobile terminal in response to the inquiry that the inquiry acceptance unit has accepted.

A service control device that, in a communication system including a communication control device calculating a communication volume of a mobile terminal, stores a charge remaining amount corresponding to a communication volume available to the mobile terminal, the service control device comprising:

• a communication state storage unit configured to store information indicating a communication state of the mobile terminal,
• an inquiry acceptance unit configured to accept an inquiry for the charge remaining amount of the mobile terminal,
• a communication state determination unit configured to determine whether the mobile terminal is in communication on the basis of the information stored in the communication state storage unit,
• an updated remaining amount acquisition unit configured to acquire the charge remaining amount updated in accordance with the communication volume calculated by the communication control device when the communication state determination unit determines that the mobile terminal is in communication, and
• a remaining amount notification unit configured to notify of the charge remaining amount of the mobile terminal in response to the inquiry that the inquiry acceptance unit has accepted.