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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!