| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a packet communication system requiring a little band and capable of enhancing use efficiency of band. <P>SOLUTION: A multicast communication packet is used for transmitting a packet from a station side communication apparatus 15 to a plurality of terminal side communication apparatuses 11-14, and a unicast communication packet is used for transmitting a packet from the plurality of the terminal side communication apparatuses 11-14 to one station side communication apparatus 15. A first and a second layer switches 16 and 17 are first and second layer 2 switches, communication lines 18-21 are TDM lines or analog lines, and a communication line 22 is TDM line. With such an arrangement, conventional matter that a large transmission band proportional to the number of terminal side communication apparatus is required and use efficiency of band is bad can be solved. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
