editor's blog
Subscribe Now

Indoor “GPS”

Location-based services have become popular as smartphones are able to listen to the faint GPS (or GLONASS) signals and figure out where you are in relation to other things. But roofs and walls can block out those satellite signals, leaving you on your own once you enter a building.

Now, many mapping applications are intended to get you to a building, so, once you’re there, well, you’re there – mission accomplished. But, as any of you that go to conventions will know, even within the building, it can still take a map to navigate the exhibition floor.

Rohm, in cooperation with iSiD, has announced the Guidepost Cell to address such indoor navigation challenges. The cells make up the nodes of a network that can detect the presence of a smartphone with WiFi turned on and then figure out which is the closest cell. Because it passively looks for telltale WiFi signals, it doesn’t have to emit a constant beacon, reducing power consumption considerably.

Because of this miserly behavior, they can operate without external power – by harvesting the indoor light. They do this using dye-sensitized cells, something we’ll cover in more detail in the future. They’re essentially “indoor” solar cells.

This means that a network can be established more or less by distributing these Guidepost Cells and turning them on. An application on the phone can then detect the network and, coupled with an indoor map, show you where you are or where you want to go or send you a message.

You can find more detail in their release.

Leave a Reply

featured blogs
Aug 20, 2019
PCB design is like conducting a full-fledged orchestra. In many creation myths, a supreme being sings the world into existence - take the fourteen Ainurs of Lord of the Rings, for example. Well,... [[ Click on the title to access the full blog on the Cadence Community site. ...
Aug 19, 2019
In this new video, Samtec’s Kevin Burt introduces Samtec Direct Connect'„¢. Direct Connect gives the benefit of exiting a higher number of lanes at low loss from the chip package, which can be very useful in both high performance computing and network switching applic...