Mobile IP(MIP)[1] Working Group에서 제안하고 있는 멀티캐스트 적용 방안에는 크게 HA기반 라우팅과 FA기반 라우팅으로 구분된다. HA기반 라우팅 방법은 멀티캐스트 패킷을 HA에서 터널링하는 방법을 사용하므로 경로의 최적화가 이루어지지 않게 되며 터널 집중화 현상이 발생하게 된다. FA기반 라우팅 방법은 이동 호스트의 핸드오프가 일어날 때마다 멀티캐스트 트리의 재구성이 필요하므로 많은 오버헤드가 발생하지만 경로 최적화는 얻을 수 있다. 본 논문은 HA기반 라우팅과 FA기반 라우팅 방안을 절충한 새로운 멀티캐스트 제공 방안을 제안한다. MH의 이동이 빈번한 마이크로 레벨에서는 HA기반 라우팅을 이용하고, MH의 이동 거리가 큰 매크로 레벨에서는 경로 최적화를 위하여 새로운 멀티캐스트 트리를 재구성함으로써 보다 효율적 멀티캐스트 서비스가 가능한 메커니즘의 프로토타입을 제안한다.
KSP Keywords
Mobile IP(MIP)
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