| 摘要 |
PURPOSE: A method for selecting an RP(Rendezvous Point) in multicasting communication is provided to select an RP by using an existing routing protocol. CONSTITUTION: When an MR(Multicast Router) receives a routing protocol message(S301), it checks whether the message is valid(S302). If the message is valid, the MR checks whether a domain identifier and a group address are valid(S303,S304). If the domain identifier and the group address are valid, the MR compares an RP select priority value included in the received message and its own RP select priority value(S305). If the RP select priority value of the MR is higher than the RP select priority value included in the message, the MR discriminates whether transmission valid time has elapsed(S307). If the transmission valid time has not elapsed, the MR transmits a message that the MR is an RP of a corresponding multicast group to a different MR(S309) and is standby(S310).
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