Caraoke: An E-Toll transponder network for smart cities

Omid Abari, Deepak Vasisht, Dina Katabi, Anantha Chandrakasan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Electronic toll collection transponders, e.g., E-ZPass, are a widely-used wireless technology. About 70% to 89% of the cars in US have these devices, and some states plan to make them mandatory. As wireless devices however, they lack a basic function: A MAC protocol that prevents collisions. Hence, today, they can be queried only with directional antennas in isolated spots. However, if one could interact with e-toll transponders anywhere in the city despite collisions, it would enable many smart applications. For example, the city can query the transponders to estimate the vehicle flow at every intersection. It can also localize the cars using their wireless signals, and detect those that run a redlight. The same infrastructure can also deliver smart streetparking, where a user parks anywhere on the street, the city localizes his car, and automatically charges his account. This paper presents Caraoke, a networked system for delivering smart services using e-toll transponders. Our design operates with existing unmodified transponders, allowing for applications that communicate with, localize, and count transponders, despite wireless collisions. To do so, Caraoke exploits the structure of the transponders' signal and its properties in the frequency domain. We built Caraoke reader into a small PCB that harvests solar energy and can be easily deployed on street lamps. We also evaluated Caraoke on four streets on our campus and demonstrated its capabilities.

Original languageEnglish (US)
Title of host publicationSIGCOMM 2015 - Proceedings of the 2015 ACM Conference on Special Interest Group on Data Communication
PublisherAssociation for Computing Machinery, Inc
Pages297-310
Number of pages14
ISBN (Electronic)9781450335423
DOIs
StatePublished - Aug 17 2015
Externally publishedYes
EventACM Conference on Special Interest Group on Data Communication, SIGCOMM 2015 - London, United Kingdom
Duration: Aug 17 2015Aug 21 2015

Publication series

NameSIGCOMM 2015 - Proceedings of the 2015 ACM Conference on Special Interest Group on Data Communication

Other

OtherACM Conference on Special Interest Group on Data Communication, SIGCOMM 2015
Country/TerritoryUnited Kingdom
CityLondon
Period8/17/158/21/15

Keywords

  • Active RFID
  • Electronic toll collection (ETC)
  • Rf localization
  • Smart city
  • Wireless

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Electrical and Electronic Engineering
  • Communication

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