Broadband vehicle-to-vehicle communication using an extended autonomous cruise control sensor

Abstract

For several years road vehicle autonomous cruise control (ACC) systems as well as anti-collision radar have been developed. Several manufacturers currently sell this equipment. The current generation of ACC sensors only track the first preceding vehicle to deduce its speed and position. These data are then used to compute, manage and optimize a safety distance between vehicles, thus providing some assistance to car drivers. However, in real conditions, to elaborate and update a real time driving solution, car drivers use information about speed and position of preceding and following vehicles. This information is essentially perceived using the driver's eyes, binocular stereoscopic vision performed through the windscreens and rear-view mirrors. Furthermore, within a line of vehicles, the frontal road perception of the first vehicle is very particular and highly significant. Currently, all these available data remain strictly on-board the vehicle that has captured the perception information and performed these measurements. To get the maximum effectiveness of all these approaches, we propose that this information be shared in real time with the following vehicles, within the convoy. On the basis of these considerations, this paper technically explores a cost-effective solution to extend the basic ACC sensor function in order to simultaneously provide a vehicle-to-vehicle radio link. This millimetre wave radio link transmits relevant broadband perception data (video, localization . . . ) to following vehicles, along the line of vehicles. The propagation path between the vehicles uses essentially grazing angles of incidence of signals over the road surface including millimetre wave paths beneath the cars.

Vehicle Safety Enhancement System: Sensing and Communication

“…It is better than increasing distance, but not as good as unchanged distance. So we set two values for each changed distance: 0 for each decreasing distance and −2 for each increasing distance, as shown in (2).…”

Efficient and Reliable Broadcast in Intervehicle Communication Networks: A Cross-Layer Approach

“…Relay-selection delay T rs is defined as the time duration from a broadcast node attempting to transmit the BRTS frame until a relay is successfully selected, and we have T rs = AIFS [4] + T b + T c . Denote w as the average time that a backoff timer of a broadcast node reaches 0, and we have…”

“…Denote w|j (j ∈ [0, CW [4]]) as the value of w given that the jth time slot is selected. Since the broadcast node uniformly selects a time slot from [0, CW [4]], we have…”

“…The U.S. Federal Communications Commission has approved 75-MHz (5.850-5.925 GHz) bandwidth for dedicated short-range communication systems in support of intelligent transportation system applications [3]. Industry manufacturers have launched several projects to study cooperative driving in IVC, such as advanced driver-assistance systems (ADASE2) [4], the Crash Avoidance Metrics Partnership [5], CarTALK2000 [6], FleetNet [7], Partners for Advanced Transit and Highways [8], etc.…”

Performance Analysis of Various Routing Protocols with Preference to Border Nodes in VANET Environment

“…Network characteristics gives methods of message diffusion, development of applications and security mechanics and communication patterns like beaconing, geobroadcasting and information aggregation make VANETs a discrete subtype of ad hoc networks [8]. Various car manufacturing companies, academic organizations and government bodies recognize the prominence of VANETs and some of them launched valuable projects on VANETs such as ADASE (Advanced Driver Assistance Systems) [9], CarTALK2000 and CarNet, also VANET assigned a spectrum by FCC (Federal Communications Commission) [10]. Single path, Multi path, Carry and forward path routing is vividly described in routing protocols of VANETs.…”