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NTIS 바로가기정보와 통신 : 한국통신학회지 = Information & communications magazine, v.30 no.5, 2013년, pp.95 - 105
핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
VANET이란? | VANET(Vehicular Ad-Hoc Network)은 MANET(Mobile Ad-Hoc Network)의 한 형태로, 무선 통신 기술을 갖춘 차량들에 의해 형성된 애드혹 네트워크를 말한다. VANET에서는 각 차량이 통신 노드의 역할을 수행하며, 차량 간 통신 또는 차량 대 노변장치(RSU:Road Side Unit) 간 통신을 통해 정보를 주고 받을 수 있다. | |
브로드캐스트의 단점은? | 브로드캐스트는 라우팅 테이블을 유지할 필요가 없고, 이웃 노드에 대한 정보를 필요로 하지 않으며, 높은 패킷 전달 신뢰성을 가지므로, VANET과 같이 높은 이동성을 가지는 환경에 효율적이다. 하지만, 많은 패킷 전송으로 인해 대역폭(bandwidth)이 낭비되고, 충돌 및 에러로 인해 스루풋 (throughput)이 낮다는 단점을 가진다. | |
VANET에서 신뢰성 있는 라우팅을 제공하기 어려운 이유는? | VANET은 MANET의 특수한 형태로, MANET과 같이 인프라(Infrastructure) 없이 노드 간 멀티홉(Multi-hop) 통신을 수행하지만, MANET과 달리 차량의 높은 이동성으로 인해 빈번한 토폴로지 변화 및 네트워크 단절이 발생한다. 이로 인해 VANET에서는 신뢰성 있는 라우팅을 제공하기 매우 어렵고, 따라서 효율적인 라우팅 프로토콜의 설계는 VANET 응용의 성능에 있어 가장 중요한 요소이다. |
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