정보처리학회논문지:컴퓨터 및 통신 시스템 (KIPS Transactions on Computer and Communication Systems)

  • 제7권6호
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  • Pages.137-144
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  • 2018
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  • 2287-5891(pISSN)
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  • 2734-049X(eISSN)
한국정보처리학회 (Korea Information Processing Society)
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VANET 망에서 지역적 캐싱을 이용하는 시공간 지오캐스팅 프로토콜

A Spatio-Temporal Geocasting Protocol Using Regional Caching in Vehicular Ad-Hoc Networks

  • 이현규 (충북대학교 전파통신공학) ;
  • 신용제 (충북대학교 전파통신공학) ;
  • 최현석 (충북대학교 전파통신공학) ;
  • 이의신 (충북대학교 정보통신공학부) ;
  • 박수창 (충북대학교 컴퓨터공학과)
  • 투고 : 2017.11.09
  • 심사 : 2018.04.10
  • 발행 : 2018.06.30
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초록

차량 애드혹 네트워크(VANETs)은 사고 통지, 콘텐츠 사용 등과 같은 다양한 응용프로그램을 제공할 수 있다. 이러한 응용 프로그램은 속성에 따라 관심영역과 수명을 갖는 시공간 데이터를 가지고 있다. 그러나, 관심 영역에 데이터를 전달하는 지오캐스팅 프로토콜은 현재 시간에만 단일 전송을 통해 영역의 모든 차량에 데이터를 제공할 수 있지만, 데이터의 수명시간 동안 해당 영역을 이동하는 차량에는 데이터를 제공할 수 없다. 따라서 우리는 VANET에서 데이터의 수명시간동안 관심 영역의 차량에 데이터를 전송하기 위해 지역적 캐싱 기법을 사용하는 시공간 지오캐스팅 프로토콜을 제안한다. 효율적이고 신뢰성 있는 지역적 캐싱을 위해서, 제안된 프로토콜은 비콘 기반 데이터 공유, 잔여 캐싱 제거 및 거리 기반 캐싱 교환을 사용한다. 시뮬레이션 결과는 제안된 프로토콜이 기존 프로토콜과 비교하여 보다 안정적이고 효율적인 데이터 전달을 달성하는지를 검증한다.

Vehicular Ad-hoc Networks (VANETS) have enabled to provide a variety of applications such as accident notification, content usage, etc. These applications have spatio-temporal data which have an interesting region and a lifetime according to their properties. However, geocasting protocols to deliver data to an interesting region can provide data to all vehicles in the region through a single transmission only at the current time, but cannot provide data to vehicles passing through the region during the lifetime of the data. Thus, we propose a spatio-temporal geocasting protocol called STGP using a regional caching scheme to send data to vehicles in an interesting region during a data lifetime in VANETs. For efficient and reliable regional caching, the proposed protocol uses the beacon-based data sharing, the extra caching elimination, and the distance-based caching exchange. Simulation results verify that the proposed protocol achieves more reliable and efficient data delivery compared with the existing protocol.

키워드

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