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Mobile PositioningeLBeS 27 April 2010
Rikard WindhCo-founder Combain Mobile AB
Mobile Positioning
Opportunity: Creates a new paradigm of services (Navigation, Nearby Search, Location Based Social Networks and more)
Picture: http://farm3.static.flickr.com/2162/2400891654_541e53b93a.jpg
Mobile Positioning
Challenge: Always have a good position - indoor and outdoor - without draining your battery!
Picture: http://farm3.static.flickr.com/2162/2400891654_541e53b93a.jpg
7 Positioning Methods
• Good outdoor accuracy (15 m)
• Limited/none indoor coverage
• Drains your battery
TextText
1. GPSPicture: http://soundofscience.files.wordpress.com/2009/03/gps_satellite_nasa_art-iif.jpg
• Learning clients / War Driving
• Good coverage in urban areas (50 m)
• Requires WiFi enabled mobile
• Requires a WiFi database
• Databases: SkyHook -
100M, WiGLE - 20M Picture: http://www.skyhookwireless.com/howitworks/coverage.php
2.
3. Cell-id
• Always available - no extra power
• Indoor and outdoor coverage (1000 m)
• Requires a Cell-id database and a cell-id API in the mobile
• Databases: Location-API - 6M,
OpenCellID - 0.6M
Picture: http://upload.wikimedia.org/wikipedia/commons/a/ae/Telstra_GSM_and_NextG_tower.jpg
4. Network positioning
• Works on all mobiles
• Indoor and outdoor coverage (100m - 1000m)
• Requires access/agreement with operators/aggregators
Picture: http://www.ericsson.com/solutions/positioning_methods/lbs.shtml
5. Spatial Triggers
• Location triggers stored in the network
• Triggers fired when:1 - entering an area,2 - leaving an area, 3 - close to another mobile
• No need to continuously pull the location. Wait for the trigger to be fired instead.
• But: Limited/not supported by operators today.
Picture: http://www.ericsson.com/solutions/positioning_methods/lbs.shtml
6. NFC
• Accuracy - 10 cm!
• Requires the user to actively wave or hold the mobile device close to the tag
• Requires pre-installed tags and NFC enabled phones
Picture: http://noknok.tv/wp-content/uploads/2009/04/nokia-6216-lassic-near-field-communication-nfc-device-1.jpg
7. 2D Barcodes
• Accuracy: 10 cm - 50 cm
• Requires a camera phone, a barcode app, and the user to take a photo.
Tag: Google Maps, Slakthuset, Malmö
Compare the7 Positioning Methods
GPS
WiFi
Cell-id
Network
0 3.75 7.50 11.25 15.00
Battery life (days)
GPS
WiFi
Cell-id
Network
0 250 500 750 1,000
Accuracy (meters)
Accuracy vs Battery Life
Coverage vs Phone Availibility
Coverage AvailibilityGPSWiFi
Cell-idNetwork
NFC2D Barcodes
Outdoor-Rural Medium
Out/Indoor-Urban Medium
Out/Indoor High
Out/Indoor Operator dependant
Tagged area Low
Tagged area High
Which one to choose?
?
Picture:http://chroniclingthecuse.files.wordpress.com/2009/03/question_mark_naught101_011.jpg
Hybrid Positioning (4/7)
GPS + WiFi + Cell-id + Network
Good accuracy in Urban & Rural areas, both Indoor & Outdoor
Long battery lifetime
High number of supported phoneshttp://www.psdgraphics.com/wp-content/uploads/2009/09/check-and-cross-icons.jpg
Hybrid Positioning (6/7)
Combine positioning methods to have both good indoor and outdoor coverage, plus longer batter life time!
Accuracy: 10 cm - 1 km
White paper
• Purpose: To give you a kick-start in your LBS project
• Released today.
• Pick a hardcopy or send me an [email protected]
