Patent ID: 7905395

Claim:
A communication system comprising: a communication terminal configured to wirelessly communicate with a base station and including a position information acquisition unit configured to obtain position information of the communication terminal at present, a payment settlement processing unit configured to perform payment settlement processing for a purchase by transmitting a purchase request from the communication terminal to a management server, and receiving authorization of a deposited amount of funds corresponding to the purchase request from the management server, a record memory unit configured to store the position information, when performing the payment settlement processing, and a record of a completed purchase for which the payment settlement processing was performed at the payment settlement processing unit, a display unit configured to display a map based on the position information stored in the record memory unit when performing the payment settlement processing and the record of the completed purchase stored in the record memory unit, and a control unit configured to transfer the record of the completed purchase stored in the record memory unit to the server; and a data server configured to transfer data through the wireless communication with the communication terminal, including a storage unit configured to store the record of the completed purchase transferred from the communication terminal; and a record disclosure processing unit configured to transfer the record of the completed purchase stored in the storage unit to other communication terminals within a predetermined range.