| 摘要 |
Space saving and effective distribution of advertisement data are achieved by using free storage spaces existing in client terminals to manage the advertisement data. To achieve this, data managed by the server is stored in free spaces of storage devices of the registered client terminals, and when data is transmitted and received through the server, the server retrieves advertisement data related to specific data from the storage device and attaches it to the specific data to be transmitted or received. Thereby, the server borrows free storage spaces of the client terminals at low rental fees to manage the management data, and thereby can reduce the capacity of storage devices provided in the server and achieve space saving and cost reduction. On the other hand, the clients receive a reward by lending free storage spaces to the server, and can perform communications at low costs by allocating the reward to communication charges.
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