Paper Details

TRB 91st Annual Meeting (January 22-26, 2012)

Event Number:	600
Event Title:	Taking Urban Data to New Heights: New Sources, New Techniques,and New Applications
Event Date:	Jan 24 2012 2:00PM- 3:45PM
Event Location:	Hilton, International Center
Event Description:
Event Agenda:

SPIVC: Smart-Phone-Based Intervehicle Communication System (12-4538)

Inter-vehicle communications (IVC) could potentially improve safety, mobility, and fuel efficiency of a transportation system. However, traditional decentralized approaches based on Dedicated Short Range Communications could take a long time to reach a meaningful market penetration rate. In this study, we attempt to take advantage of ubiquitous smartphones and develop an IVC system based on smartphones, called SPIVC. In this system, smartphones on vehicles communicate with a central server and share traffic information with each other. Field tests are carried out on both WiFi and 3G networks to determine the accuracy of GPS devices and communication delays between vehicles. A communication model is developed to explain communication delays. It is found that location errors are about 4 meters after warm-up, and communication delays are in the order of seconds and depend on the frequency of location updates in GPS devices. The SPIVC system, which can be centralized or decentralized, holds great promises for an array of multimodal transportation applications that are not very sensitive to GPS accuracy and communication delay.

Authors
     Jin, Wen-Long , University of California, Irvine
     Kwan, Candy , University of California, Irvine
     Sun, Zhe , University of California, Irvine
     Yang, Hao , University of California, Irvine
     Gan, Qijian , University of California, Irvine