USER FRIENDLY ELECTRONIC CASH SYSTEM AND A CONTROL METHOD THEREOF, CAPABLE OF USER-FRIENDLY PROVIDING A SUBSCRIPTION STEP AND A CHARGING STEP WHEN USERS USE ELECTRONIC CASH

摘要

PURPOSE: A user friendly electronic cash system and a control method thereof are provided to enable a user to charge electronic cash if a fixed condition is satisfied even though the electronic cash is not charged, thereby preventing a difficult situation due to not charged electronic cash.;CONSTITUTION: An electronic cash service server(100) stores balance information corresponding to at least one portable terminal. The electronic cash service server subtracts balance information by an electronic cash payment request. If the subtracted balance information is smaller than a preset limit value, the electronic cash service server increases the balance information up to a preset charging reference value. A portable terminal(200) increases the embedded electronic cash by an electronic cash subtraction signal.;COPYRIGHT KIPO 2011