IP 망에 액티브 네트워크 기술을 도입하기 위해서는 네트워크 내에서 물리적으로 직접 연결되지 않은 액티브 노드들이 서로에 대한 토폴로지 정보를 구성하고 관리하는 방법이 필요하다. 또한 하나의 프로그램을 수행하기 위해 필요한 액티브 패킷들은 손실 없이 전송되어야만 정상적인 작업을 수행할 수 있다. 뿐만 아니라 액티브 패킷은 중간 노드에서의 실행으로 기존의 네트워크에 비해 큰 융통성을 가지므로 효율성과 안전성이 보장되어야 한다. 본 논문에서는 네트워크 내의 액티브 노드들이 상호 간에 가입과 탈퇴 여부를 발견하기 위해서 OSPF(Open Shortest Path First) 프로토콜의 Opaque LSA(Link State Advertisement)를 이용하도록 하였다. 또한 수신지에서 손실을 감지하여 송신지에 재전송을 요구하는 신뢰성 전송 방식과 액티브 패킷의 사본을 이용한 복사 후 전송, 송·수신지에서의 보안 기법 적용이 이루어지도록 하는 액티브 패킷 전송 엔진을 제안하였다. 시뮬레이션을 통하여 기존의 기법과 비교·분석한 결과, 적용한 액티브 노드 발견 기법과 액티브 패킷 전송 엔진이 효율적임을 확인할 수 있었다.
KSP Keywords
Link state, Open Shortest Path First, shortest path first(SPF)
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