Delivering real-world ubiquitous location systems

G. Borriello, A. LaMarca, M. Chalmers, P. Nixon

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)
14 Downloads (Pure)


A large number of research and commercial location systems havebeen developed over the past twodecades [7]. In general, these systems have one of two goals: providing highly accurate location estimates, on the order of centimeters, within a small area, or provid-ing lower accuracy over a widecoverage area [8]. Systems with afocus on accuracy typically requireboth extensive infrastructure andrelatively expensive sensors. AT&TCambridge's Active Bats [1] system, for example,employs active ultrasonic badges and requires theinstallation of ceiling-mounted ultrasound receiversevery square meter.
Original languageEnglish
Pages (from-to)36-41
Number of pages5
JournalCommunications - ACM
Issue number3
Publication statusPublished - 31 Mar 2005


  • ubiquitious computing
  • mobile devices
  • hand-held computing
  • useability


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