다양한 유무선 액세스망들이 IP기반 공통의 코어망을 이용할 수 있도록 연동되는 BcN에서는 휴대 단말이 이종망간에 이동하는 상황에서도 끊김 없는 서비스를 제공하는 것이 필수 요소 기술이고, 이를 지원하기 위해서 고속의 핸드오버 기능 및 위치 관리 기능이 필요로 된다. 특히 고속의 핸드오버를 수행하기 위해서는 액세스망에 의존적인 데이타링크 계층 기능들과 IP기반 이동성 기능들이 밀접히 연계되어 동작되어야 한다. 본 고에서는 IP망에서의 대표적인 이동성 지원방법인 Mobile IP 기술과 데이터링크 계층의 이동성 관련 트리거 정보를 통일된 형태로 상위 계층으로 전달하는 IEEE 802.21 MIH (Media Independent Handover)기술에 대해 소개하고, Mobile IP와 MIH기술을 바탕으로 이종망간에 끊김없는 이동성을 제공하는 방법에 대해서 살펴볼 것이다.
KSP Keywords
IEEE 802.21 MIH, Mobile IP(MIP), media independent handover(MIH)
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