The basic safety message (BSM, also called a beacon) is the most fundamental building block that enables proximity awareness in the IEEE Wireless Access in Vehicular Environments. For driving safety and agile networking, the frequency of the BSM transmissions should be maintained at the maximum allowable level, but at the same time, rampant BSM proliferation needs to be curbed to leave room for higher priority messages and other applications that share what small bandwidth we have in the 5.9-GHz Dedicated Short-Range Communications band. In this paper, we describe an application-level messaging frequency estimation scheme called frequency adjustment with random epochs (FARE), which significantly improves the BSM throughput while using less bandwidth than the bare 802.11p delivery. FARE can be implemented purely on the application layer and uses neither cross-layer optimization nor explicit feedback from neighboring vehicles. It is only a few lines of code; therefore, it can easily be embedded in the BSM application program executed in the onboard unit.
Bibliographical noteFunding Information:
Manuscript received June 22, 2011; revised November 18, 2011 and February 22, 2012; accepted February 28, 2012. Date of publication March 6, 2012; date of current version May 9, 2012. This work was supported in part by the National Research Foundation of Korea, funded by the Ministry of Education, Science, and Technology through the Midcareer Researcher Program under Grant 2011-0028892 and in part by the Ministry of Knowledge Economy and Microsoft Research through the Information Technology/ Software Creative Research Program, supervised by the National IT Promotion Agency (NIPA), under Grant NIPA-2011-ITAC1810110200120001000100100. The review of this paper was coordinated by Prof. Y. Zhang.
- Application-centric frequency control
- Wireless Access in Vehicular Environments (WAVE)
- basic safety message (BSM)
- periodic broadcast
- vehicle-to-vehicle (V2V) communication
ASJC Scopus subject areas
- Automotive Engineering
- Aerospace Engineering
- Electrical and Electronic Engineering
- Applied Mathematics