| 摘要 |
<p>Provided is a packet relay device for efficiently transferring a communication packet transmitted from a plurality of terminals connected with a network. The packet relay device is positioned in the network, in which a plurality of local networks are connected with each other through a global network, and at the boundary between the local network and the global network. The packet relay device comprises an acquisition unit for specifying the terminal of a transmission source from a broadcast packet transmitted by the terminal in the local network thereby to acquire group information on the group, to which the specified terminal belongs, a conversion unit for converting the broadcast packet into a virtual multicast packet corresponding to the group information acquired beforehand, a transfer unit for transferring the virtual multicast packet to another corresponding relay device, and a packet conversion unit for converting the virtual multicast packet into a corresponding real broadcast packet.</p> |
