People who use global positioning satellite (GPS) receivers know buildings and other structures can degrade the information, which makes getting an accurate indoor position fix almost impossible. But researchers at Duke University have developed a way to change that.
Romit Roy Choudhury, associate professor of computer engineering at Duke's Pratt School of Engineering, told me that indoor-position information might let shoppers' cellphones tell them about products in front of them or help parents locate their children in malls. Such a capability might help with "navigation" in hospitals or in smart homes. "Imagine lights in your home following you based on your precise location and activity. Our technique takes advantage of 'invisible' indoor landmarks a mobile phone can sense."
He said motion signatures created by elevators or stairwells could serve as landmarks. Once a phone senses such a landmark, the phone could infer its location and then track its path from that point using accelerometers, compasses, and gyroscopes.
I remain skeptical. First, I usually know what I need when I go shopping. I don't have time to browse through aisles of other products, and I won't wait for my phone to describe features of nearby products. As for lights that turn on and off based on my position, I can buy switch replacements that do this without position information. Someone who needs directions in a hospital, for example, can usually find a map or ask someone else for help. And when kids get old enough to cruise through a mall on their own, they'll have cellphones, and parents can simply call and say, "Where are you?"
Electronic accelerometers, compasses, and gyroscopes already can provide good tracking information indoors. (The Duke team reported an average accuracy of only 1.6m.) Instead of relying on GPS data and "invisible" indoor landmarks, sensors in smart devices, combined with RFID tags and Near Field Communication (NFC), could provide accurate position information and a way to calibrate locations quickly. Find a "calibration spot," place your phone next to it, and you get updated coordinates to within a few centimeters -- that is, if you need this information. It might amuse some to know we could navigate quite well indoors and out before the advent of electronics.
As we've discussed before, newer phones already include NFC capabilities for use with an app such as Google Wallet for immediate payment at checkouts. Microsoft Windows 8 software and Windows Phone 8 and Surface hardware will include NFC, too. Microsoft already has application programming interfaces for the PeerFinder and ProximityDevice classes. If you're an app developer, you can jump into NFC and use it as you choose. Indoor navigation might be such an app, but I doubt we really need it.
There's a dark side to indoor navigation, too. You might not know whether your smartphone lets someone else track your position. Beware.
What's your take on indoor GPS? Let us know in the comments section below.
@oldbikefixr: Not sure the security aspect worries me as much. As with any new technology, those issues are addressed over a period of time and I think given that the Internet has been actively in use by the general public for well over a decade, many of the major holes are secure, at least to my satisfaction and for the type of data I put over it. Now that's not to say there aren't breaches and aren't opportunities for hacking--I get that. But it was likely the same for the phone service and other communications tools when they were in the early stages.
As for the indoor GPS, I will join your camp as being a skeptic. I'm one of those people that agree much of this new technology is overkill. However, given that I've been covering technology since the early 80s when the PC first was announced, I'm seasoned enough to see certain innovations take hold with the general public that will just stick, in some form or another. Just had this conversation this weekend with my husband about Facebook technology. Might not be the Facebook we know today, but that kind of social, put it all out there interactive platform is here to stay in some form or another.
A soon to be released product from Guardian Lion called the 'Leo' addresses all of your concerns. It's a cell phone GPS watch with an accelerometer as well. You call call the kid but, the web site will show you where they really ARE! www.guardianlion.com
That's useful to find the phone, tlschott, but what if the phone is in another room? In that case, you would have rescue personnel risking their lives to find phones, not people. There's a lot of instances where people charge their phones in a home office, or living room, or simply forget to take the phone into the bedroom with them.
Isn't this another example of a solution looking for a problem? If you can't locate your children, a GPS really isn't the solution. Same with windshield wiper blades in WallyWorld. I'm confident once the technology is created, applications will abound. Once a technological innovation is announced, manufacturers leap at the opportunity to shoe-horn it into their producs. Not for the purpose of enhancing operation but solely for the purpose of product differentiation. I really don't want to be the first in my neighborhood with a north seeking microprocessor controlled Philips Screwdriver with built-in GPS in case I lose it.
Being an engineer, I personally have a very good 3D understanding of things and places. However, just because we engineers can look at a map and know how to get from one place to another does not mean others can do the same. My wife for example only seems to think in words. She can look at a map all day long and still have no idea how to get where she wants to go. She has to have a verbal description of how to get there. With the size of some of the mails, museums, hospitals, etc an indoor GPS, however it works, would be wonderful for her. Even for me, I have been at malls and decided I wanted to find a specific store, it then took me 5 to 10 minutes just to find a map to find where the store was, only to find the store was the oposite direction from where the map was, so I could find use for it also.
The other thought that comes to mind, with the last new car we got; I got a GPS in it. After using that GPS for 5 years the car was wrecked. I then discovered how dependant I had become on the GPS. Not sure if that is good or bad.
Finally as to locating children, yes you can call them on their phone, but will they actually tell you the truth of where they are?
The retail enhancing possibilities of this technology will undoubtedly pay for itself.
But the greatest benefit I see is for emergency response personnel . . . primarily firefighters slogging their way through a smoke filled building. I can envision a heads up display indicating directions to exit routes based on the firefighters actual location. That might be good information to know when you can't see more than a few feet in any direction.
Giant, a grocery store in MD, has a hand scanner that shoppers can pick up when they enter the store and scan their products as they shop. Additionally, the scanner pop ups deals based on my location in the store. It is a really nice device. So checkout is fast and easy because all I do is scan a barcode my order comes up, pay and go.
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