gps + mobile phones, connecting services to location/presence
DESCRIPTION
GPS + mobile phones, connecting services to location/presence. Sune Jakobsson, Research manager, Telenor R&D 14 January 2009. Outline. GPS location GSM location Current terminals Examples Challenges Issues. GPS location. Satellites in the sky Tall buildings Indoors Multipath problems - PowerPoint PPT PresentationTRANSCRIPT
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GPS + mobile phones, connecting services to location/presenceSune Jakobsson, Research manager, Telenor R&D
14 January 2009
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Outline
• GPS location
• GSM location
• Current terminals
• Examples
• Challenges
• Issues
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GPS location
• Satellites in the sky
• Tall buildings
• Indoors
• Multipath problems
• 15m accuracy
• 2min cold-start
• A-GPS
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Cell-id+ Directional antenna
GSM location technologyCell-id +TA
• + Timing advance
Accuracy 200m – 35 km
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Current terminals
• GPS built-in
• E911 requirement
• Geo-tagging of pictures
• Geo-caching of blogs
– Twinkle
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User trends
• User generated content
• User generated services
• Mash-ups
Let’s play!
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Presence lowers communication barriers
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Carpooling
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Challenges
• Inaccuracy
• Easy to jam
• Using alternative means for location
– http://www.opencellid.org
• Personal invasion
• Misuse of location
• Regulation
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Commercial ideas
• Provide “location/presence” to 3rd party developers
• On company level
– Control buildings, heat, lights, guards, alarms, etc.
– Switchboards, call to closest employee
– Mobile office, team work, rescue
– Instant messaging with presence information
• On individual level
– Status for family and friends: In office, On travel,
– Instant messaging with presence information
– Call routing
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Issues regarding location/presence
• When is privacy invaded?
• What level of automation?
• What not to combine?
• How much detail to use?
• How much history to use?
• How to control sharing (reselling)?
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Thank you!