| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately decide the assignment of merchandise when selling merchandise through a network, and to prevent any vicious vender from repeatedly committing any fraudulent action. <P>SOLUTION: As regards bid information received from a buyer device, a sponsor device calculates an expected evaluation value based on the probability of transaction success and transaction failure, and divides it into a speculation frame and a determination frame at random. As regards the speculation frame, the sponsor device defines a buyer device having the maximum expected evaluation value as a winner, and transmits the information of the winner and an interim payment sum to a seller device and the buyer device to make those devices perform transaction, and classifies the buyer device into transaction ending, and defines the evaluation of the seller device as OK in the case of the completion of transaction, and defines the evaluation of the seller device as NG in the case of the non-completion of transaction, and makes the buyer device pay the amount of a balance to the seller device when transaction is performed between the buyer device and the next seller device. Then, as regards the determination frame, the sponsor device arranges the buyer devices so that the evaluation values can be put in a descending order, and defines the buyer devices from the high rank to the order of the number of quantity of merchandise sales as winners, and transmits the information of the winner and the payment sum to the seller device and the buyer device. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
