Vehicle Information And Communication System Research Articles

An Analysis of Exact VRPTW Solutions on ITS Data-based Logistics Instances

This paper describes an exact solution approach for the Vehicle Routing and scheduling Problem with Soft Time Windows (VRPSTW), and presents its application on a realistic logistics instance based on the VICS (Vehicle Information and Communication System) data, an ITS application in Japan. Exact solutions of VRPSTW have been compared with those of the Vehicle Routing and scheduling with Hard Time Windows (VRPHTW). Detailed analysis of environmental issues and idling time along with the traditional comparison of cost and number of vehicles, shows that the exact VRPSTW solutions are not only cost efficient but helpful in reducing congestion, which implies these are more environmentally sustainable.

CyberCars-2 Cooperative Cybernetic Transport System Architecture

Research on Intelligent Cooperative Systems (ICS) based on wireless vehicular communication to improve automotive safety and traffic efficiency is being promoted through initiatives such as the Vehicle Safety Communications Consortium (VSCC) and Vehicle-Infrastructure Integration (VII) in the US, SMARTWAY and Vehicle Information and Communication System (VICS) in Japan, and European R&D activities within the framework of i2010: Intelligent Car Initiative - e.g., PReVENT, CVIS, and SAFESPOT. Related standardization activities include Continuous Air Interface for Long and Medium Range (CALM) to set up a stable, globally compatible regulation framework enabling higher market impact. The Car2Car Communication Consortium (C2C-CC) supports an open, interoperable industry standard for vehicular communication based on wireless local area network (WLAN) technologies pushing for specific frequency band allocation at 5.9 GHz for critical automotive safety. This paper shows CyberCars-2’s cooperative Cybernetic Transport System (CTS) architecture compatible with C2C-CC and CALM achievements. SAFESPOT for architecture design was adopted after meeting cooperative systems benefits, i.e., improving traffic safety for more efficient logistics and response to hazards and accidents, improved road network management and control and shorter, more predictable journey times.

Constructing a Traffic Information Providing System Utilizing Multi-Source Information

To realize an effective ITS(Intelligent Transport Systems) services, such as a traffic jam prediction system or car navigation system, the traffic information like average traffic speed is indispensable. However, current systems providing traffic information have serious problems about lack of data. Hence, we construct a system which provides traffic information, which complements lack data using incomplete probe and VICS(Vehicle Information and Communication System) data. The system utilizes multi-information such as real time/stored/diffusion/succession information effectively. We verified the performance of the system through experiments using probe/VICS data of Nagoya city, and confirmed beneficial results.

Radio-on-DWDM Transport Systems Based on Injection-Locked Fabry-Perot Laser Diodes

A radio-on-dense-wavelength-division-multiplexing (DWDM) transport system based on injection-locked Fabry-Perot laser diodes (FP LDs) with four microwave carriers and large effective area fiber (LEAF) transmission was proposed and demonstrated. Good performance of bit error rate (BER) and intermodulation distortion to carrier ratio (IMD/C) over a-50km of LEAF was obtained. Signal quality meets the demands of personal handy system (PHS)/vehicle information and communication system (VICS)/electronic toll collection (ETC)/satellite broadcasting (SB).

Radio over dwdm transport systems for PHS/VICS/ETC/SB applications FBG

A radio over dense-wavelength-division-multiplexing (DWDM) transport system for personal handy system (PHS)/vehicle information and communication system (VICS)/electronic toll collection (ETC)/satellite broadcasting (SB) applications was proposed and demonstrated. Improved performance of bit error rate (BER) over a-100 km of large effective area fiber (LEAF) was obtained. Signal qualities meet the PHS demand with a data signal of 1.9 GHz/10 Mbps, VICS demand with a data signal of 2.5 GHz/12 Mbps, ETC demand with a data signal of 5.8 GHz/20 Mbps, and SB demand with a data signal of 12 GHz/25 Mbps.

Dynamic Routing System for Traffic Dispersion Using Global Traffic Information and Local Communication.

We propose a new way to disperse planning route of transportation using IVC (Inter Vehicle Communication) in this paper. VICS (Vehicle Information and Communication System) has been developed to solve the traffic jam which is one of the ITS (Intelligent Transportation Systems) technologies. The VlCS is able to provide real-time global information with drivers and navigation system which helps drivers to find the fastest route according to the current traffic conditions. However, it is afraid that spatial oscillation of traffic jam "hunting phenomena" will happen if most of cars follow given global information with time delay from VICS. 0n the other hand, IVC is a developing technology which enables cars to exchange various information with others by optical communication, millimeter electromagnetic waves and so on. We therefore propose the combination way to decrease traffic congestion using IVC and VICS. At first we show the hunting phenomena in numerical simulations and the relationship between hunting phenomena and VICS user ratio. We propose a way to disperse planning route by IVC, and then confirm effect of the proposed way in city traffic models in numerical simulations.

Basic study on traffic information system using LED traffic lights

The vehicle information and communication system (VICS) is starting to become practicable. The infrared system of a VICS detects vehicles on the road by using optical beacons to control traffic and to supply real-time traffic information. But it needs an enormous budget because the optical beacons must be located on every lane of the road throughout the country. We propose a traffic information system using existing LED traffic lights, and focus on its visible rays and power used for traffic control, the number and location of the traffic lights, and the movement toward LED traffic lights. We design the best service area not to interfere with other service areas and analyze its basic performance such as the suitable modulation, required SNR and the amount of receivable information.

A Study about Fusion of Image Processing Sensor by means of Multitask Scheduling

As the herald of real-world ITS application, Vehicle Information and Communication System (VICS) service has entered into the nation-wide deployment stage and the Electric Toll Collection System (ETC) is moving ahead to actual deployment. In 2000, the Advanced Cruise-Assist Highway System (AHS) demonstration will be conducted as a step toward real operations. Under such circumstances, a technology examination about increasing efficiency of the image sensor system is needed. We proposed a new technique to fuse many kinds of sensors related to the road traffic toward the actual deployment of AHS. A technique to fuse two kinds of the image sensors on the bases of multitask scheduling using the both preemption and time slice algorithm on the real time operating system is proposed in this paper. Furthermore, we establish the fused sensor and demonstrate the excellent performance of this sensor by doing inspection about detection ability of traffic condition, speed of passing vehicle, illegal parking and road condition in the actual outdoors environment.

A survey of present ivhs activities in Japan

The Japanese Government has been conducting IVHS (Intelligent Vehicle-Highway Systems) projects on ATMS (Advanced Traffic Management Systems), ATIS (Advanced Traveller Information Systems) and AVCS (Advanced Vehicle Control Systems). In the spring of 1996, VICS (Vehicle Information and Communication System) started a driver information service including dynamic route guidance, and ASV (Advanced Safety Vehicle) aiming at active safety for passenger cars had demonstrations. Experiments related to Automated Highway Systems have been conducted since 1995 on a test track and an expressway. Cooperative driving, with inter-vehicle communication, was tested in the spring of 1997. Besides the Government projects, navigation systems have become widespread, and inter-vehicle distance warning systems for trucks and an intelligent cruise control system for passenger cars have become commercially available.

The strategy and deployment plan for VICS

The objective of a vehicle information and communication system (VICS) is to disperse traffic by providing drivers with road traffic information to enable them to satisfy their natural desire to "get there faster". Put simply, VICS is based on drivers' arbitrary selection of routes and on the automobile's unique ability to take any desired route. The objective is to promote the safe, smooth flow of traffic by naturally distributing the flow of traffic, which is done by guiding cars to the appropriate routes in accordance with drivers' instinctive desire to reach their destinations quickly by avoiding traffic congestion. VICS distributes road traffic information such as traffic jams or accidents to drivers in real time, and stimulates drivers for accurate and proper utilization.