Abstract
Vehicular sensors capture a large amount of data, and a routing algorithm is needed to effectively propagate the data in vehicular sensor network (VSN). The existing routing algorithms in vehicular ad hoc network (VANET) can not be transplanted to VSN directly. After analyzing the mobility of vehicles, we find that the delivery time of vehicle to vehicle (V2V) or vehicle to infrastructure (V2I) is very short especially when a deliverer is at a corner or crossroad and tries to deliver data to its left/right direction. Using existing routing algorithms in VANET will cause the big amount of data to stuck at corners or crossroads and to be transmitted back and forth with very few data packets being delivered. It is very time consuming and computation consuming. In this paper, we propose a data delivery algorithm called distribution-based data delivery to handle the above-mentioned corner problem with the help of some vehicular sensors like accelerometer. Evaluations show that the time cost of data delivery at corners is saved for at least 30% by our algorithm comparing to other routing algorithms like VADD in VANET.
Highlights
vehicular ad hoc network (VANET) is a hot topic in recent years; it is proposed to enhance driving safety by propagating traffic information among driving vehicles
Fuel tank sensor gives fuel level value; if the fuel level increases at a location, the vehicle probably is refueling and the location is a fuel station; a vehicle can request the locations of fuel station from its neighbors so that it knows where to refuel without the help of online GIS system
If we look at the data delivery in the perspective of data itself and combined with the characteristics of vehicular sensor network (VSN), we find that existing data delivery algorithms will cause the big amount of data to stuck at corners or crossroads and cause big time and resource waste
Summary
VANET is a hot topic in recent years; it is proposed to enhance driving safety by propagating traffic information among driving vehicles. Because vehicular sensors will collect a large amount of data, VSN needs a routing algorithm which can handle this amount of data. If a vehicle has to deliver data to its left direction at crossroad or corner, the time for delivery is d/v, d is the width of road, and v is the velocity of the vehicle driving across the crossroad. For a large bulk of data which is at least 10 MB, it needs eight times for transmitting in an ideal situation, it will cost much more using the existing routing algorithm in VANET. Red block that represents a data block can be completely delivered when a vehicle driving across a corner.
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