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Using cellular phones as probes

Using cellular phones as probes. Jean-Luc Ygnace Y.B Yim. Driving forces. More than 60 millions cell phone subscribers The telematics market is organized around cellular communications

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Using cellular phones as probes

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  1. Using cellular phones as probes Jean-Luc Ygnace Y.B Yim

  2. Driving forces • More than 60 millions cell phone subscribers • The telematics market is organized around cellular communications • Through the E-911 mandate the carriers must implement Automatic Location Identification (ALI) technologies by October 2001 (network or handset) to handle the 30,000 daily 911 calls • Virtually all leading vendors agree the next generation wireless technology will be based on CDMA (datacomm market research)

  3. New challenges • The cell phone positioning technology can be used to estimate travel times • The positioning technology is well suited to be combined with other sources of information (loops, tags, taxi probes, etc.)

  4. Results from a simple simulation model

  5. Real time vs. Probe time

  6. The BayArea estimates • We evaluate the percentage of cars traveling with a digital cell phone « on » up to 11.6% on the freeway at commuting time • Considering a carrier like Cellular One only, this percentage would be around 5%

  7. Bay Area network links

  8. Estimates of the number of probes by link for a 5 minute period

  9. Cost figures • (E-911) 800 cell stations x $ 20,000 : $16,000,000 • (E-911) user charge 65c/ month • ~ $15,600,000/year • Air time cost estimates : to be done

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