Quality, Reliability, Security and Robustness in Heterogeneous Networks

Volume 74 of the series Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering pp 559-570

A Comparison of 802.11a and 802.11p for V-to-I Communication: A Measurement Study

  • Wei-Yen LinAffiliated withComputer Science and Information Engineering
  • , Mei-Wen LiAffiliated withComputer Science and Information Engineering
  • , Kun-Chan LanAffiliated withComputer Science and Information Engineering
  • , Chung-Hsien HsuAffiliated withInformation and Communications Research Laboratories

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802.11p, also known as WAVE, is a standard protocol intended for future traffic systems in order to support safety and commercial non-safety applications for vehicular communication. 802.11p is modified from 802.11a, and both are based on OFDM. The main difference between 802.11a and 802.11p is that the latter is proposed to use 10 MHz frequency bandwidth (half of bandwidth of 802.11a) in order to make the signal more robust against fading and increase the tolerance for multipath propagation effects of signals in a vehicular environment. In this paper, we investigate the performance difference between 802.11a and 802.11p for Vehicle-to-Infrastructure communication through real-world experiments. We measure contact duration and losses of 802.11p and 802.11a in both LOS and NLOS environments. In addition, we investigate their throughput with different modulations over various distances between OBU and RSU to evaluate the feasibility of using rate adaptation for non-safety V-to-I applications.


802.11p guard interval multipath modulation