by David Zax, Technology Review
Sebastian Anthony over at Extreme Tech has a thoughtful take on the emerging world of what he calls IPS, or indoor positing technology. IPS isn’t just hyper-refined GPS. Actually, it’s a whole different category of technology, relying on different aspects of our infrastructure to help locate you within a space. Different companies are cobbling together different approaches to IPS, Anthony notes. Google triangulates your position based on the strength of the signal you receive from various hotspots. Nokia opts for a form of Bluetoothy triangulation, while there’s a Broadcom chip that uses NFC. Infrared and “acoustic analysis” has even been experimented with, reportedly. (Bats, meanwhile, echolocate.)
http://www.technologyreview.com/blog/helloworld/27806/?p1=blogs
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