| 摘要 |
PURPOSE: A multi-point connection method of an instant messenger service using a multi-casting is provided to reduce a load of a messenger server by allocating a multi-cast address to a user who requests a multi-point connection using a multi-casting system. CONSTITUTION: A user connected to an instant messenger checks whether other user is connected for a multi-point connection(S101), and transmits a multi-point connection request message to a messenger server(S102,S103). The messenger server informs the multi-point connection request to the other user and waits an acceptance(S104). The other user accepts the multi-point connection request, the messenger server allocates a multi-cast IP address capable of executing a multi-point connection and informs the multi-cast IP address to the user and the other user(S107). The user and the other user start a multi-point connection through the multi-cast IP(S108). During the multi-point connection, the user terminates the connection(S109) and transmits a connection termination message to the messenger server(S110). The messenger server checks whether the last user of the multi-point connection terminates the connection(S111). If the last user of the multi-point connection terminates the connection, the multi-cast IP address is released(S112).
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