Patent ID: 8601072

Claim:
An information processing system including a plurality of information processing apparatuses, wherein each information processing apparatus includes a storage unit, an identification information receiving unit configured to receive identification information identifying an information processing apparatus, transmitted from another one of the information processing apparatuses, an exchange data communication determining unit configured to determine, based on the identification information of the other information processing apparatus received by the identification information receiving unit, whether or not to execute an exchange data communication process in which at least one of transmission of exchange data to the other information processing apparatus and reception of exchange data from the other information processing apparatus is performed, an exchange data communication control unit configured to control the exchange data communication process based on the determination by the exchange data communication determining unit, and an identification information registration control unit configured to register in the storage unit at least the identification information of the other information processing apparatus as a partner with which the exchange data communication process has been performed by the exchange data communication control unit; and if the identification information of the other information processing apparatus received by the identification information receiving unit is already registered in the storage unit, the exchange data communication determining unit determines not to execute the exchange data communication process.