Currently, all commercialized traffic information systems within the automotive telematics industry are centralized systems, either integrated within an In-Vehicle navigation system or as a stand alone system. With the proliferation of wireless communication technologies, Inter-vehicle communication could potentially be applied to solve ever-worsening transportation problems around the world. As a component of the Intelligent Transportation System and one of the concrete applications of mobile ad-hoc networks, the most important feature of IVC is its ability to extend the horizon of drivers beyond the line of sight and thus, to improve road traffic safety and efficiency. In this paper, we study the basics of Inter-Vehicle Communication, its design, architecture, applications and also discuss some field trials. This paper is intended to demonstrate the feasibility of IVC based traveler information systems and the interaction between IVC and Network vehicular traffic.
1. Introduction
Public expenditures on transportation have exceeded $680 billion annually over the last decade [2]. Even so, the vehicular networks are based only on the coarsest of information and single bits of data transmission. These systems all require a centralized traffic information centre (TIC) to process traffic information. The information is derived, typically from data collected from fixed detection stations installed in the roadways connected to the TIC via wired cable. Shortcomings of these centralized information systems include the following:
• Huge capital investment is needed to initiate the system. • The system is difficult to upgrade. • The system is vulnerable to failures.
On the other hand, moving vehicles equipped with communication devices form exactly an instance of long envisioned Mobile ad hoc networks. Benefiting from large capacities (In terms of both space and
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