본 논문에서는 IEEE 802.21 MIH (Media Independent Handover) 기반의 빠른 모바일 멀티캐스트 핸드오버 방식을 제안한다. 기존의 모바일 멀티캐스트 방식들이 L3 이동성 검출기반으로 하기 때문에 발생하는 문제점인 긴 멀티캐스트 핸드오버 지연시간 문제를 MIH를 확장한 멀티캐스트 아키텍쳐를 정의하여 해결한다. 본 논문에서는 MIH에 멀티캐스트 핸드오버를 효율적으로 수행하기 위한 멀티캐스트 메니저를 도입하고, 모바일 멀티캐스트를 위한 전용 MIH 메시지들을 추가한다. 또한, 멀티캐스트 특성 상 핸드오버 뿐만 아니라 채널 잽핑 (zapping) 이벤트의 경우에도 네트워크를 선택해야하는 상황에 처하게 되므로 이를 고려하였다. 최적의 망을 선택함에 있어서 멀티캐스트 네트워크 선택 알고리즘을 단말의 속도와 AHP/GRA라고 하는 공정한 선택 알고리즘을 이용하여 설계한다. 마지막으로 시그널링 비용과 멀티캐스트 핸드오버 지연시간 측면에서 제안하는 아키텍쳐가 기존 방식들에 비해 가지는 장점을 시뮬레이션을 통해 증명한다.
KSP Keywords
IEEE 802.21 MIH, media independent handover(MIH)
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