| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a PLC (power line communication) repeater, a PLC communication system and a PLC communication method which can positively perform high-quality communication when multicast communication having member variation through a PLC network in which a communication status easily varies. <P>SOLUTION: If a MAC address table is set in the inside when receiving a multicast packet from a video server 4 of a multicast group, PLC modems 2a, 2b, 2c and 2d, and the PLC communication system consisting of these modems convert the multicast packet into a unicast packet and transmit it to a power line 1, and if the MAC address table is not set, they transmit the multicast packet to the power line 1 as it is. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
