Analyzing the efficiency of the IEEE 802.11p standard in laboratory environment

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Dr. Vida Rolland
Department of Telecommunications and Media Informatics

Nowadays intelligent transportation systems are becoming of great importance for their role played in keeping the ever growing road traffic safe and efficient. Without continuous communication between the participants this would be almost impossible to achieve.

The IEEE created the 802.11p Wi-Fi standard with the specific goal in mind of creating an internationally interoperable communications standard capable of working in the demanding vehicular conditions. My thesis is about building and testing a system that implements the IEEE 802.11p standard.

First I give a detailed overview in the form of a comparison of 802.11p and the other members of the 802.11 family, underlining the compatibility options among them. After that I enumerate the existing test networks, and projects implementing the 802.11p standard, and I present the setup I created based on that information.

After a detailed description of the hardware and sofrware setup of the test network and its placement, I show my measurement results. From those I concluded that 802.11p behaves noticeably differently from 802.11a, despite their similarities. At small distances 11p was able to provide better connection quality; however, with increased distance and the lack of direct signal path between the devices it becomes rather unstable, and 11p significantly surpassed it. In vehicular environments it is thus advantageous to use the newer standard.


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