Showing papers on "Vehicular communication systems published in 1999"

Autonomous vehicle transit system

Abstract: A transit system in an environment is provided that includes vehicles and communication nodes. The communication nodes contain information that is updated or re-written and sent to one or more vehicles. The information stored in the communication nodes provides data regarding the environment, communication node positions, vehicle communique, and vehicle control. The vehicles and the communication nodes communicate with each other. A vehicle by receiving the information from the communication nodes is able to move in the environment without complex sensors, to adapt to changes in the environment, to perform specific actions, and to communicate to other vehicles. Also, a vehicle by updating the information in the communication nodes is able to update out-dated information and to affect the actions and movements of other vehicles.

Systems and methods for providing vehicular traffic information to a mobile station (MS) through a wireless telecommunications network

Abstract: Apparatus, methods and systems relating to providing vehicular traffic information through a wireless telecommunications network. An exemplary system includes a geographic location system (GLS), a database containing vehicular roadway information, and a vehicular traffic determination node. The GLS is operative to determine the approximate physical location of at least one Mobile Station (MS) in communication with the wireless telecommunications network. The vehicular traffic determination node is operative to i) receive and correlate the approximate physical location of the MS to the vehicular roadway information to generate vehicular traffic information, and ii) communicate the vehicular traffic information to the wireless telecommunications network; the wireless telecommunications network can selectively-transmit or broadcast the vehicular traffic information.

The Effects of an Inter-Vehicle Communication Network on the Traffic Flow

Abstract: This paper demonstrates that a vehicle to vehicle communication network is effective in improving traffic safety and road capacity. An autonomous cruising traffic flow simulator is used in the evaluation. When compared to a speed adaptation system, it is shown that the vehicle to vehicle communication network system is superior.

Communication systems in the intelligent transport systems

Abstract: This paper gives an overview of communications systems in Intelligent Transportation Systems (ITS). It first describes vehicle to roadside communications and how they are applied to traffic information, route guidance, and automated toll collection systems. It then describes vehicle to vehicle communications which are applied to traffic platooning and cooperative driving.

How transportation systems talk to each other

Abstract: National standards are especially critical for deployment of intelligent transportation systems (ITS). The core purpose of ITS is to improve communications so that localities and regions are linked together in a way that results in an improved transportation system. The National ITS Architecture provides a common structure for the design of ITS. A 1996 survey found a desire for quick action to set standards on several high-priority areas: the National Transportation Communications for ITS Protocol (NTCIP) and Transit Communications Interface Protocol (TCIP), which address systems such as dynamic message signs, traffic signal controllers, environmental-sensing stations, highway radio advisory, closed-circuit television to monitor traffic, freeway ramp meters, traffic/transit management center-to-vehicle interfaces, and traveler information services; the Location Referencing Message Set; Commercial Vehicle Information Systems and Networks (CVISN); Dedicated Short-Range Communications (DSRC); and data dictionaries and message set templates. The Transportation Equity Act for the 21st Century (TEA-21) required the U.S. Department of Transportation (DOT) to submit a report to Congress by June 1, 1999, identifying critical ITS standards and specifying the development status of each standard identified. DOT is now moving into the process of testing the standards. The ITS Standards Test Team has identified about 55 standards to be tested. The remainder, such as data dictionaries, were deemed not testable.

Intelligent transportation system (its): development and introduction into the area of split-dalmatian county

Abstract: Intelligent transportation system (ITS) implies the introduction of new information, communication, and sensor technology in the area of traffic and transportation. ITS aims to obtain better traffic conditions; to decrease the number of traffic accidents and incidents; to reduce the number of victims and damages caused by these incidents; and to decrease unnecessary loss of traveling time. In this paper, the proposal of ITS architecture for Split-Dalmatian County (Croatia) is provided, together with the description of ITS subsystems (information, call center, control and management, location and navigation, and communication subsystems).

Intelligent Transportation Systems – Vehicular Communications Options

Abstract: As mainstream society rapidly enters the Information Age, network connectivity becomes a necessity for both business and personal activities. Mobile users also increasingly require network connectivity, particularly within vehicles. Wireless networks have the capabilities to provide network connectivity to mobile users, but there are a large number of existing and planned wireless networks. Each technology, and each individual network implementation of the underlying technology, have specific strengths and weaknesses. This paper identifies existing and planned wireless technologies, and analyzes their capabilities to support the requirements of the anticipated applications. The conclusions are presented in terms of the dynamic changes being experienced in applications development and wireless communications deployment. Since a single wireless communications technology cannot presently support all the desired vehicular applications, flexible, hybrid communications systems are viewed as the preferred approach for the near-term future. (A) For the covering abstract see IRRD E102826.