Data aggregation and information type in road probing

Abstract

The RSU can collect and disseminate information to enhance road traffic safety. Meanwhile, with the widely use of the sensors and wireless ad hoc networks, the VSN is formed. Combined the functions of the RSU and the VSN, the Road Probing scenario is proposed to enlarge the RSU's information collection range. In this paper, we focus on the safety-related traffic information on freeway and the practicable data aggregation scheme for Road Probing. We conclude the most important data types to be gathered. After that, a data aggregation scheme using time converge globally and space converge locally will be proposed in Road Probing. Our method can greatly reduce data redundancy, and its advantage is confirmed by the simulation results. The data reception improves greatly and the transmission delay is comparatively low. © 2012 Springer-Verlag.