1. Eirik K. Moen IUP - COSC380 FALL 2007
Tracking cell phones

2. Tracking cell phones Tracking people and objects What`s needed How
Improve Accuracy
Examples

3. Tracking people/OBJECTS
Since the 70`s we have seen tracking devices in movies – then it was science fiction – but not today
GPS gives accurate location, but requires an additional device (and need to be outdoors)
The GSM network keeps track of your phone to be able to route your call to the right base station

4. What's needed The phone number to be tracked Maps
Access to the Service Providers server

5. How The GSM networks polls the phone The data is analyzed
The location data is shown on a map
The phone responds to the poll

6. IMPROVE Accuracy
Use more than one base stations to improve accuracy (triangulation)
Use geographical data to calculate dead spots
For locating objects use Radio Direction Finder to get accurate position

7. EXAMPLE

8. Real-life Example
Live example

9. GSM tracking Tracking people and objects What`s needed How
How to improve Accuracy
Examples
QUESTIONS?