1. Visualize your cell network
using a mobile app
(C) 2012 Barbeau Development

2. How does it work?
 CellViz is a mobile app that collects GPS and cell signal
information simulatenously
 To collect data, run the CellViz mobile app
(e.g., Android) on the device
 Click “Start” to begin recording
 Click “Stop” to stop recording
 The app collects the data, and emails you the results:
 CSV file – can be imported into any spreadsheet
software
 KML file – can be visualized in Google Earth
(C) 2012 Barbeau Development

3. What cell networks are supported?
 CellViz can potentially be used to analyze any type of
cellular network that is exposed via a developer API.
 CellViz has been implemented on Android v2.1 and
higher for:
 CDMA, 1xRTT, EVDO, and WiMax
 GSM
 iDEN
(C) 2012 Barbeau Development

4. What data is collected? (1)
 CellViz collects the following values for each GPS fix:
 Latitude and Longitude (in decimal degrees), and
Altitude (in meters)
 Timestamp (to the millisecond)
 Speed (meters/sec)
 Bearing (i.e., Heading) in 0-359 degrees
 Estimated Horizontal Accuracy (i.e., how accurate the
positioning technology thinks the position is)
 Number of Satellites used to calculate the position
(C) 2012 Barbeau Development

5. What data is collected? (2)
 CellViz is capable of collecting the following cell signal
data (if available) simultaneous to each GPS fix:
 RSSI
 EC/IO
 Bit Error Rate
 Signal-to-Noise ratio
 base station ID
 base station location
 network ID
 sector ID
 (continued on next slide…)
(C) 2012 Barbeau Development

6. What data is collected? (3)
 CellViz is capable of collecting the following signal data (if
available) related to each GPS fix:
 …
 MAC address
 Frequency
 Channel
 IP address
 NAPID
 Connection time
 CINR
 Link speed
 NSPID
 Transmission power
(C) 2012 Barbeau Development

7. Visualize results in Google Earth
 Google Earth allows 4D
visualization of your cell
network data, including:
 3D camera orientation
 Time-lapse for handoffs
 3D tower models
 3D building models
 3D terrain modeling
 Some screenshots follow
(C) 2012 Barbeau Development

8. See each cell signal sample with lines drawn to serving tower
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9. Folders on the left organize data
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10. Callouts show data for each sample
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11. See 3D buildings and their effect on signal strength
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12. Color and altitude of circles represent signal strength
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13. Diameter of circle represents accuracy of GPS
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14. View 3D terrain’s effect on signals
 As the mountain blocks the phone’s line-of-sight with
the tower, cell signal quality decreases
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15. View 3D terrain’s effect on signals
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16. Bird’s Eye view shows coverage per tower
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17. Each tower has info in callout
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18. View complex handoffs in time-lapse
(C) 2012 Barbeau Development

19. Questions?
 sean@cellviz.com
 http://www.cellviz.com
(C) 2012 Barbeau Development