%0 Journal Article
%T Do Not Stuck at Corners: A Data Delivery Algorithm at Corners in Vehicular Sensor Networks
%A Jidong Zhao
%A Xing Zhang
%J International Journal of Distributed Sensor Networks
%D 2012
%I Hindawi Publishing Corporation
%R 10.1155/2012/387541
%X 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. 1. Introduction VANET is a hot topic in recent years; it is proposed to enhance driving safety by propagating traffic information among driving vehicles. Although great progress has been made in data routing, VANET still cannot find enough convincing applications. Modern vehicles are equipped with various sensors, the sensors are used to monitor the states of vehicle and surroundings. The information vehicular sensors collected would be very useful for some crowdsourcing applications. For example, fuel tank sensor gives fuel level value; if the fuel level increases at a location, then 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. Vehicular sensors enrich the information VANET could propagate; therefore, the combination of wireless sensors and VANET to construct vehicular sensor network (VSN) or vehicular ad hoc and sensor network (VASNET) [1] is a good complement of VANET. There are many good routing algorithms in VANET can be transplanted to VSN, like GPSR [2] and VADD [3], because VSN has the same network architecture as VANET. However, because vehicular sensors will collect a large amount of data, VSN needs a routing algorithm which can handle this amount of data. In most cases, routing algorithm works at network layer, it simply forwards the packet passed down from upper layers
%U http://www.hindawi.com/journals/ijdsn/2012/387541/