Intelligent Transportation Systems

Modular Composition of Synchronous Programs: Applications to Traffic Signal Control

Zennaro, Marco
Raja Sengupta
2006

This paper describes a modular compilation scheme for distributed synchronous programming. The approach is first described mathematically and then implemented as a library to distribute Simulink (59). Application of the scheme is illustrated by developing a control system to coordinate traffic signals.

Kalman Filter-Based Integration of DGPS and Vehicle Sensors for Localization

Rezaei, Shahram
Raja Sengupta
2007

We present a position estimation scheme for cars based on the integration of global positioning system (GPS) with vehicle sensors. The aim is to achieve enough accuracy to enable in vehicle cooperative collision warning, i.e., systems that provides warnings to drivers based on information about the motions of neighboring vehicles obtained by wireless communications from those vehicles, without use of ranging sensors. The vehicle sensors consist of wheel speed sensors, steering angle encoder, and a fiber optic gyro. We fuse these in an extended Kalman filter. The process model is a dynamic...

Decentralized Error-Dependent Transmission Control for Model-Based Estimation Over a Multi-Access Network

Huang, Ching-Ling
Raja Sengupta
2008

This paper is motivated by the estimation problem and active safety design for ITS. We investigate the performance of model-based estimation over a multi-access network and emphasizes on asymptotic time-averaged MSE while using error-dependent transmission control. The performance of this decentralized policy is analyzed and an improved policy is also proposed to achieve robustness in a shared channel. Our results suggest that, while designing communication logic for vehicular safety applications, dynamics of the system and channel congestion should be considered at the same time.

A Bounded Real Lemma for Jump Systems

Seiler, P.
Raja Sengupta
2009

This note presents a bounded real lemma for discrete-time Markovian jump linear systems (MJLSs). We show that the linear matrix inequality in the bounded real lemma is both necessary and sufficient for this class of systems. For the case of one plant mode, this condition reduces to the standard necessary and sufficient condition for discrete-time systems. We envision this lemma being used to construct necessary and sufficient analysis and synthesis conditions for MJLSs.

3/2–Approximation Algorithm for Two Variants of a 2-Depot Hamiltonian Path Problem

Rathinam, Sivakumar
Raja Sengupta
2010

We consider two variants of a 2-depot Hamiltonian path problem and show that they have an algorithm with an approximation ratio of 32 if the costs are symmetric and satisfy the triangle inequality. This improves the 2-approximation algorithm already available for the problem.

ITS Band Roadside to Vehicle Communications in a Highway Setting

Dickey, Susan
Dulmage, Jared
Huang, Ching-Ling
Raja Sengupta
2010

Researchers investigated the testing and evaluation of radio and communication protocol standards for the 5.9 GHz spectrum that has been approved by the Federal Communications Commission for exclusive transportation use. This spectrum allocation is intended for use as Dedicated Short Range Communications (DSRC) in the context of high-value Intelligent Transportation Systems (ITS) applications. In this report, we summarize the Wireless Access in a Vehicular Environment (WAVE) standardization effort for 5.9 GHz DSRC, its current status, and related issues of the IEEE 802.11p and IEEE 1609...

Using Smartphones to Enable Situation Awareness on Highways

Manasseh, Christian
Fallah, Yaser P.
Raja Sengupta
Misener, James A.
2010

Motivated by the proliferation of Smartphone devices, the authors present a system architecture to enable the delivery and exchange of intelligent transportation systems (ITS) messages to Smartphones on the road. The purpose is to provide an ITS situation awareness system architecture that would enable application developers to build Smartphone applications for ITS mobility and safety. The authors present a “Slow Traffic Ahead” application as a means to validate the architecture and perform a field experiment in the San Francisco Bay Area comprised of 30 users to test the performance of...

ITS Band Roadside to Vehicle Communications in a Highway Setting

Dickey, Susan
Dulmage, Jared
Huang, Ching-Ling
Raja Sengupta
2010

Researchers investigated the testing and evaluation of radio and communication protocol standards for the 5.9 GHz spectrum that has been approved by the Federal Communications Commission for exclusive transportation use. This spectrum allocation is intended for use as Dedicated Short Range Communications (DSRC) in the context of high-value Intelligent Transportation Systems (ITS) applications. In this report, we summarize the Wireless Access in a Vehicular Environment (WAVE) standardization effort for 5.9 GHz DSRC, its current status, and related issues of the IEEE 802.11p and IEEE 1609...

Fair scheduling for real-time multimedia support in IEEE 802.16 wireless access networks

Fallah, Yaser P.
Nasiopoulos, Panos
Raja Sengupta
2010

Successful deployment of Broadband Wireless Access Networks such as WiMAX (IEEE 802.16) will be contingent on provisions for supporting multimedia traffic. In this paper, we review the quality of service features of access networks such as the 802.16 standard, and identify algorithms and schemes that are needed for supporting multimedia traffic in such networks. The 802.16 standard only specifies the features that should be implemented and leaves the design of a quality of service solution to developers. This includes the design of a mandatory scheduling framework. We present a...

Cooperative High-Accuracy Location (C-HALO) Service for Intelligent Transportation Systems: A Cost Benefit Study

Goodliss, Adam
Manasseh, Christian
Ekambaram, Venkatesan N.
Raja Sengupta
Ramchandran, Kannan
2011

This paper presents a cost benefit study of a Cooperative High-Accuracy LOcation (C-HALO) service as a nationwide service capable of providing decimeter level positioning accuracy to enable several new applications across various industries. We survey and summarize work by others quantifying the benefits reaped from enabling applications that require C-HALO. However, benefits to the economy from enabling C-HALO for Intelligent Transportation Systems (ITS) have not been quantified in the literature. This study estimates these benefits. We also provide an order of magnitude rough estimate of...