| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optimum common data distribution system even under an environment wherein a reception node cannot be specified by eliminating problems in the conventional simultaneous broadcast communication system. <P>SOLUTION: A data distribution apparatus carries out a data distribution start notice and each of terminals calculates a response delay time unique to each own terminal on the opportunity of reception of the data distribution start notice. When one terminal intercepts a data distribution request in response to the data distribution start notice from the other terminals, the terminal stops transmission of its own data distribution request, and when the one terminal does not intercept the data distribution request transmitted form the other terminals before the response delay time elapses, the one terminal transmits its own response. Further, when the data distribution is carried out on the basis of the response from the one own terminal, the one own terminal receives distributed data as a representative terminal, and when the data distribution is not carried out to the one own terminal on the basis of the response from the one own terminal or when the one own terminal intercepts a response with respect to the data distribution start notice from the other terminals, the one terminal intercepts data distribution as an intercept terminal. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
