| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a network for utilizing a satellite, that realizes data broadcasting, allows a sender to dynamically generate a client group even just before the broadcasting of data and to freely set a distribution destination. SOLUTION: A group address is provided to a client and a port of the address is always open. A transmitter side transmits a list where a group address for data reception and specific numbers of clients are cross-referenced with each other to the client. When the client finds out its own specific number in the list, the client opens the port for the data reception group address. When the port is closed, the transmitter sends a release instruction to the address. Upon the receipt of the release instruction, the client closes the port.</p> |
