Safety and Traffic Efficiency Applications for GeoMessaging over Cellular Mobile Networks

Vehicular communication for road safety and traffic efficiency applications based on short-range wireless communication (IEEE 802.11p/ITS G5) and ad hoc networking has been extensively studied and is being tested in major field trials. For the same purpose, the usage of cellular mobile networks has recently received more attention. This paper investigates a case study of a road-works warning and an obstacle warning application that applies GeoMessaging over cellular mobile networks. We present a system architecture based on a GeoService Backend concept and a protocol design. Our approach enhances existing protocols for safety and traffic efficiency messages, originally developed for ad hoc communication over short-range radio, and integrates cellular mobile networks and ad hoc networks. The approach introduces two types of messages that tradeoff between dissemination area and validity time. Finally, the paper presents the implementation design of the GeoService Backend and gives an outlook to the tests that will be carried out in the DRIVE C2X project, a pan-European field trial for vehicular communication.