Communication Protocol Optimization for Cooperative Vehicle Localization
Date Issued
2014
Date
2014
Author(s)
Ou, Chih-Hsien
Abstract
This thesis analyzes how the communication influences the performance of our cooperative localization system , Neighbor Map, which is one of the Intelligent Transportation Systems (ITS). Neighbor Map provides users with a small map of all nearby vehicles including those shaded or in blind spots through communication. This is done by everyone broadcasting the vehicles they detected. As result, the performance of communication channel plays a significant role in both the design and performance in the system , while it is frequently ignored. Plenty of works just assume a communication range in which the packet transmissions always succeed. With vehicle traces collected from real world, in order to analyze the system performance under different communication settings, we have used a VENET simulator, then giving a way to improve the system performance. Since the original transmission data size is too large, we have reduced the communication packet size through compress unused parts and compress the resolution of floating point numbers. Besides, we have decide to use the unslotted-ALOHA MAC protocol and get 1% packet collision rate under most situations.
Subjects
ITS
cooperative localization
VANET
V2V communication
Type
thesis
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ntu-103-R01922104-1.pdf
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