인터넷 서비스가 발달함에 따라 다자간 화상회의 등 다수의 송신자를 가지는 멀티캐스트 서비스에 대한 관심이 증가하고 있다. 다자간 멀티캐스트 서비스를 지원하기 위해서는 프로토콜뿐만 아니라 가입자 관리 및 세션 관리를 제공하는 세션 관리자의 기능이 요구된다. 현재 ITU-T에서 표준화를 진행 중인 RMCP-3는 다대다 멀티캐스트 프로토콜로써, 다수의 참여자들이 송신자 역할을 수행하여 데이터를 송수신하는 기능을 제공한다. 본고는 컨퍼런스 응용과 같이 다수의 호스트가 데이터를 생성하여 보낼 수 있는 다자간 멀티캐스트 통신 프로토콜에서의 세션 관리자 기능에 대한 고려사항을 살펴보고자 한다.
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