| 摘要 |
<p>There are included a multicast packet transmitting part (201) for periodically multicasting an identifier of a local apparatus; a relay deciding part (205) for deciding whether a received data packet should be relayed to the router of another segment; a sequence deciding part (207) for deciding, based on information included in multicast packets from other routers, a router to which the data packet should be transferred; and a packet relaying part (206) for informing, when it is decided that the received data packet should not be relayed, a router selected, as a relay destination, by the sequence deciding part (207) to the source of transmitting the data packet and for transferring the data packet to the selected router. In this way, a router suitable for relaying the packet is eventually selected. Moreover, since the switching of relay routers is performed only by redirecting the routers, there is no need of providing any additional functions to the terminals.</p> |
