| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a simultaneous multicasting command system that enhances the certainty of transmission of command information to a plurality of command-receiving terminals. <P>SOLUTION: A command control part 240 of a command information storage device 200 allows a sound-recording part 250 or an image-recording part 260, to store the command information that is transmitted by a command terminal 100 and received by a packet-receiving part 210. Here, when the packet-receiving part 210 receives information of command-receiving terminals whose acknowledgements of reception are not received, the command control part 240 allows a protocol control part 230, to execute control of a packet-transmitting part 220. The information of command-receiving terminals whose acknowledgements of reception are not received is the information for specifying a command-receiving terminal, whose acknowledgement of the reception of information transmitted by the command terminal 100 can not be received by the command terminal 100 from among the plurality of command-receiving terminals 300. The information of command-receiving terminals whose acknowledgements of reception are not received is also the information transmitted from the command terminal 100. The protocol control part allows the packet transmitting part to transmit the command information stored in the sound-recording part 250 or the image-recording part 260 to the command-receiving terminal 300 specified by the information of command-receiving terminals whose acknowledgements of reception are not yet received. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
