| 摘要 |
A signal-transceining system and a method thereof in a communications system using a peer-to-peer mode are provided to transmit and receive a multicast message and manage an IP address by using a USI(USI: Universal Service Interface) server in a USI(USI: Universal Service Interface). A terminal # 1(401) performs an ACR/BSS(Access Control Router/Base Station)(403), an authentication and registration stage. The ACR/BSS performs AAA(Authorization, Authentication and Accounting) server(405), authentication and registration stage. The ACR/BSS assigns the IP address to the terminal #1. The ACR/BSS transmits the address registration request message to USI server(407). USI server registers the IP address of the terminal #1.
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