The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Physical Layer Issues in Vehicular Communications

차량통신에서의 물리계층 이슈

  • 조웅 (중원대학교 컴퓨터시스템공학과)
  • Received : 2012.08.27
  • Accepted : 2012.10.05
  • Published : 2012.10.31
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Abstract

Vehicular communications have been receiving much attention in intelligent transport systems (ITS) by combining communication technology with automobile industries. In general, vehicular communications can be used for vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication by adopting IEEE802.11p/1609 standard which is commonly known as wireless access in vehicular environments (WAVE). WAVE system transmits signal in 5.9GHz frequency band with orthogonal frequency division multiplexing (OFDM) signaling. In this paper, we consider physical layer issues in vehicular communications. We first overview the physical (PHY) layer of WAVE standard and properties of 5.9GHz signals, and then physical layer issues to provide reliable communication link are discussed.

차량통신은 통신시스템과 차량산업을 융합하여 ITS (Intelligent Transport Systems)분야에서 다양한 서비스 제공을 위해 고려되어져 왔다. 일반적으로 차량통신은 WAVE (Wireless Access in Vehicular Environments)라고 알려져 있는 IEEE 802.11p/1609표준을 채택하여 차량간 통신 및 차량-노변기지국간 통신에 이용된다. WAVE 시스템은 OFDM (Orthogonal Frequency Division Multiplexing) 신호를 5.9GHz대의 주파수를 사용하여 신호를 전송하는 시스템이다. 본 논문에서는 차량통신 영역 중 물리계층의 이슈들에 관하여 논의한다. 먼저 WAVE 표준의 물리계층과 5.9GHz대의 신호의 특성에 대해 살펴본 후 신뢰성 있는 통신링크 제공을 위해 물리계층에서 개선되어야할 점에 대해 논의한다.

Keywords

References

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