Pedestrian collision avoidance in vehicular networks

Main applications in vehicular networks are primarily looking for road safety improvement. To achieve this goal, positiondata information of all interfering road users must be conveyed effectively. This proposal examines the performance made possible using WAVE/DSRC standard when including pedestrians/two-wheels. First, we propose a specific message format for encapsulating pedestrian and two-wheel position-data information. Second, we propose a complete system for collision avoidance at intersection level. Subsequently, we perform tests to analyze the system performance in terms of packets reception rate and transmission delay using WAVE/DSRC standard in two modes of operation. Namely, we perform a comparison between using only the control channel to announce and forward messages as a safety service, and using one of the dedicated channels 172 or 184 after announcing the service on the control channel. Taking into account different levels of network densities, we investigate the modes of operation that provide lower congestion and channel saturation. The findings in this work are relevant to the design of data transmission patterns for pedestrian collision avoidance systems at intersections when using VANETs.