Data Transfer Method and Server Computer System

Abstract

A server computer system generates, for data stored in a transmission source server, index information including a data identification number, a data type, information for the data such as copyright information and an address of a server whereat the data are stored, and transmits only the index information to a hand-held information terminal carried by the owner of the transmission source server, thereby, a data transfer is requested for transferring, to a transmission destination server, data indicating the index information from the hand-held information terminal to the transmission destination server in accordance with the index information held by the hand-held information terminal and an address of the transmission destination server.

1 . A data transmission method for transmitting data between a first system including a first server and a first client terminal and a second system including a second server and a second client terminal via a network, the method comprising:
 sharing identification information of data stored in the first server between the first client terminal and the second client terminal;   generating, by the second client terminal, a transfer request for requesting transmission of the data stored in the first server to the second server and transmitting the transfer request to the first system, wherein the transfer request includes index information specifying the identification information of the data stored in the first server and an address of the second server on the network; and   transmitting, by the first server, the data to the second server according to the index information included in the transfer request.   
     
     
         2 . A data transmission system comprising:
 a first system including a first server and a first client terminal; and   a second system including a second server and a second client terminal, in which data is transmitted between the first system and the second system via a network, wherein   (1) the first client terminal includes   a first information sharing means for sharing identification information of data stored in the first server with the second client terminal,   (2) the second client terminal includes   A second information sharing means for sharing the identification information with the first client terminal, and   a first transmitting means for generating a transfer request for requesting transmission of the data stored in the first server to the second server and transmitting the transfer request to the first system, the transfer request including index information specifying the identification information of the data stored in the first server and an address of the second server on the network, and   (3) the first server includes   a second transmission means for transmitting the data to the second server according to the index information included in the transfer request.   
     
     
         3 . A system including a first system including a first server and a first client terminal and a second system including a second server and a second client terminal, in which data is transmitted between the first system and the second system via a network, the second client terminal, including:
 an information sharing means for sharing identification information of data stored in the first server with the first client terminal; and   a transmitting means for generating a transfer request for requesting transmission of data stored in the first server to the second server and transmitting the transfer request, wherein the transfer request includes index information specifying the identification information of the data stored in the first server and an address of the second server on the network.