| 摘要 |
<p>A communication system 1 includes a GGSN 20 calculating a communication volume of a mobile terminal 40, and a service control device 30 storing a charge remaining amount corresponding to a communication volume available to the mobile terminal 40. The service control device 30 includes an inquiry acceptance unit 37 accepting an inquiry for the charge remaining amount of the mobile terminal 40, a communication state determination unit 36 determining whether the mobile terminal 40 is in communication, an updated remaining amount reception unit 33 acquiring the charge remaining amount updated in accordance with the communication volume calculated by the GGSN 20 when the communication state determination unit 36 determines that the mobile terminal 40 is in communication, and a remaining amount notification unit 38 notifying of the charge remaining amount of the mobile terminal 40 in response to the inquiry that the inquiry acceptance unit 37 has accepted.</p> |
