When mobile phones become networked sensors

The Coming World of Mobile Sensors does a great job illustrating how mobile phones will impact our future. We’ll soon think of mobile phones not only as communication devices but also as sensors. This talk on Sensor Networks at the Lift conference first changed the way I think of mobile phones back in February 2007.

Imagine mobile phones as sensors constantly recording your geo-location, speed, altitude, temperature, nodes in proximity etc. Let’s ignore privacy concerns for a second. The data could be anonymized for example.

Data for personal use only

Even if the data is not shared with other devices some interesting applications are possible, e.g.

  • Personal diary of locations – searchable
  • Tracking of commute time – recommendations for best commute time
  • Weather history – searchable
  • Live blog geo-tagged photos as you take them

Data shared with nearby nodes

Now let’s allow the mobile devices to communicate with nodes in their proximity:

  • Personal diary is now also aware of who you were with at any given moment
  • People you keep running into but haven’t met can be introduced automatically

A German startup called aka-aki built a social network on top these two ideas. Your Bluetooth enabled phone tracks other phones in proximity. It basically keeps a trail of who you cross throughout the day. Another way to meet interesting people. Love it!

Data shared between all nodes – centrally aggregated

The real power of mobile sensors emerges when they’re networked together and the nodes have access to all the data (e.g. aggregated centrally). This totally changes the applications that are possible:

  • Real time traffic for your commute (I’ve written about this before)
  • Real-time weather in all locations as well as weather forecasts
  • Heat maps of sensor density indicating events

What other applications can you dream up?

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