한국인터넷방송통신학회논문지 (The Journal of the Institute of Internet, Broadcasting and Communication)

  • 제18권2호
  • /
  • Pages.55-62
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  • 2018
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  • 2289-0238(pISSN)
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  • 2289-0246(eISSN)
한국인터넷방송통신학회 (The Institute of Internet, Broadcasting and Communication)
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강인성을 개선한 VANET에서의 자율 TDMA

Autonomous TDMA for VANETs with improved robustness

  • 박혜빈 (상명대학교 컴퓨터과학과) ;
  • 정진우 (상명대학교 휴먼지능정보공학과)
  • 투고 : 2018.02.26
  • 심사 : 2018.04.06
  • 발행 : 2018.04.30
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초록

VANET은 급격히 부상하고 있는 서비스 영역으로 수 ms 수준의 엄격한 latency 요구사항을 가진다. 이러한 수준의 낮은 latency를 보장하기 위해 latency가 보장되면서 coordinator에 의한 scheduling 없이 join/leave가 자유로운 Autonomous TDMA(ATDMA)가 제안된 바 있다. 본 연구에서는 hidden node, 채널 페이딩, 노드 밀집도 변이 등이 존재하는 non-perfect decoding 환경에서 동작하도록 ATDMA를 확장한 ATDMA revision(ATDMA-R)을 고안하였다. 또한 시뮬레이션을 통해 ATDMA와 ATDMA-R의 성능을 비교하여 ATDMA 대비 ATMDMA-R이 다양한 실제적 환경에서 강인성을 보이는 것을 확인하였다.

VANET is a rapidly emerging service area with strict requirements of a few milliseconds' latency. Because current systems don't guarantee ultra-low latency, it has been proposed a latency-guaranteed Autonomous ATDMA(ATDMA) in which autonomous joining/leaving is allowed without coordinator's scheduling. In this study, we extended ATDMA to operate in non-perfect decoding environments with existing hidden nodes, channel fading and node density variation, and named it ATDMA revision(ATDMA-R). We also evaluated the performance of ATDMA and ATDMA-R, and showed the robustness of ATDMA-R through various realistic simulation scenarios.

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참고문헌

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