Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Adaptive Transmission Scheme According to Vehicle Density in IEEE 802.11p MAC Protocol

IEEE 802.11p MAC 프로토콜에서 차량밀도에 따른 적응전송기법

  • Woo, Ri-Na-Ra (School of Electronics Engineering, Kyunpook National University) ;
  • Han, Dong-Seog (School of Electronics Engineering, Kyunpook National University)
  • Received : 2011.12.05
  • Accepted : 2012.04.17
  • Published : 2012.04.25
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Abstract

The roadside unit (RSU) collects vehicle information from vehicles in the intelligent transportation system (ITS). The vehicle density on the road within the communication range of a RSU is a time varying parameter. The higher the vehicle density, the more vehicle information can be collected. Therefore, the probability of packet collision will be raised. In this paper, an adaptive transmission scheme is proposed to improve the probability of packet reception rate by changing the data rate and transmission period according to the vehicle density. The performance of IEEE 802.11p MAC protocol that is a standard for vehicular communications is evaulated in terms of the vehicle density with the ns-2,33 simulator.

지능형 교통시스템에서는 노변장치와 차량의 통신장치간 정보교환을 통해 차량의 정보를 수집한다. 그리고 한 노변장치의 통신범위 내의 차량밀도는 시간에 따라 바뀐다. 차량밀도가 높아지면 한 노변장치에서 수집되는 차량정보가 많아지고 패킷의 충돌 확률이 높아진다. 본 논문에서는 차량밀도에 따라 전송속도 및 전송주기를 변경하여 패킷 수신율을 높이는 IEEE 802.11p 기반 적응 전송 알고리듬을 제안한다. 차량 간 통신 프로토콜 표준인 IEEE 802.11p MAC프로토콜을 ns-2.33으로 구한하여 차량밀도의 변화에 따른 성능을 평가하였다.

Keywords

References

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