Place Lab: Device Positioning Using Radio Beacons in the Wild

Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3468)


Location awareness is an important capability for mobile computing. Yet inexpensive, pervasive positioning—a requirement for wide-scale adoption of location-aware computing—has been elusive. We demonstrate a radio beacon-based approach to location, called Place Lab, that can overcome the lack of ubiquity and high-cost found in existing location sensing approaches. Using Place Lab, commodity laptops, PDAs and cell phones estimate their position by listening for the cell IDs of fixed radio beacons, such as wireless access points, and referencing the beacons’ positions in a cached database. We present experimental results showing that 802.11 and GSM beacons are sufficiently pervasive in the greater Seattle area to achieve 20-30 meter median accuracy with nearly 100% coverage measured by availability in people’s daily lives.


Global Position System Access Point Cell Phone Ubiquitous Computing Global Position System Receiver 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  1. 1.Intel Research Seattle 
  2. 2.Intel Research Cambridge 
  3. 3.Department of Computer ScienceUCSan Diego
  4. 4.Department of Computer Science & EngineeringUniversity of Washington 
  5. 5.Information SchoolUniversity of Washington 

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