This paper describes our implementation of the Universal Location Framework, a technology that allows aggregating multiple location technologies, seamlessly transition between them, and exposes a single Application Programming Interface (API).
Today there are well-established technologies for position location such as Global Positioning System (GPS), cell phone triangulation using Enhanced Observed Time of Difference (E-OTD), and emerging technologies such as Digital TV (DTV) signals, Wifi, and so forth. The performance variation of these technologies with respect to the environment has been the main reason for their development and continued existence. ULF is addressing this issue by not being restricted to any specific technology. Instead, it uses a layered approach that allows integrating (fusing) multiple technologies.

intel’s research in location-aware computing seems to have resulted in JSR-179, which was approved a few weeks ago. with luck, it will be implemented shortly.

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