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Mobile and Location-Based Services
Jason I. Hong
Product Design and Usability
April 19 2007
The Big Picture
• Mobile Social Computing– inTouch: Coordination for Families and Small Groups
– Whisper Mobile: Coordinating groups for social events
• Large-scale mobile collaboration– Hitchhiking: Estimating “busyness” of places
• Key themes:– Usable privacy and security
– Location-based services
– Mobility
– Greater awareness of people and places
The Big Picture
• Mobile Social Computing– inTouch: Coordination for Families and Small Groups
– Whisper Mobile: Coordinating groups for social events
• Large-scale mobile collaboration– Hitchhiking: Estimating “busyness” of places
• Key themes:– Usable privacy and security
– Location-based services
– Mobility
– Greater awareness of people and places
inTouch: Coordination for Families
• Make it easier to coordinate with others while mobile– Better awareness and messaging
Target Users:• Small to med. groups of people• Fluid and demanding schedule• Multiple responsibilities
Examples:• Dual-career families• Work groups• Ad hoc (ex. conferences)• Carpools
Mobility
AwarenessMessaging
Dual-Career Families
• Coordination breakdowns inevitable– Children’s activities change without notice
– Parent’s meetings run over
– Impromptu appointments
– Unexpected traffic
• Result:– High levels of anxiety
– Some parents fear about “forgetting” their children
• Need support for awareness and improvisation
inTouch: Coordination for Families
• Two week field study with six dual-career families
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Status Confirmation Reminder Planning Schedule Reschedule Recall
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inTouch: Coordination for Families
• Make it easier to coordinate with others while mobile– Better awareness
– Contextual messaging
Combines:• Shared calendar• Shared todo lists• Reminders• Real-time location• Proximity
Project: InTouch
It’s 4:30pm and Mom is stuck in traffic
inTouch checks her calendar and sees she’s supposed to pick up Cindy from ballet
Project: InTouch
Mom’s phone senses that she is in a traffic jam, and automatically prepares a status message
Mom hits “send”, and Cindy sees that Mom is running late. Cindy decides to wait inside.
Contextual Messaging
• Using current context to: – Select a message template
– Fill in the blanks (like a MadLib)
– In most cases, can just hit “send”
• When is contextual messaging useful?– Calendar alarms “running late, will be there in <ETA>”
– Current activity “in a meeting now, done at <time>”
– Daily rhythms “picked up kid ok” at 3PM
– Messages received “where r u?” -> “I am at <place>”
Contextual Messaging
• Messaging can be linked to calendar or reminders– S: Can you get dinner tonight?
– J: Ok, I will pick up __________ on my way home
– Activate as a reminder when you leave work
Message easy to select around 4PM
Fill in the blank based on patternsand what’s near your home
Example Mockups
• Currently developing working prototypes
The Big Picture
• Mobile Social Computing– inTouch: Coordination for Families and Small Groups
– Whisper Mobile: Coordinating groups for social events
• Large-scale mobile collaboration– Hitchhiking: Estimating “busyness” of places
• Key themes:– Usable privacy and security
– Location-based services
– Mobility
– Greater awareness of people and places
Whisper Mobile
• Goal: Make it easy to find, share, and coordinate friends going to social events
Whisper Mobile: Creating an Event
• Minimal text input– Use location
– Use audio
– Use camera
Continuing Work
• Developing working prototype of web site and mobile– Web crawler for finding social events
– Web site to coordinate on scale of weeks and days
• Link with inTouch– Coordinate friends
– See who’s late, where we’re going next
– Mobile to coordinate on scale of hours and minutes
The Big Picture
• Mobile Social Computing– inTouch: Coordination for Families and Small Groups
– Whisper Mobile: Coordinating groups for social events
• Large-scale mobile collaboration– Hitchhiking: Estimating “busyness” of places
• Key themes:– Usable privacy and security
– Location-based services
– Mobility
– Greater awareness of people and places
Project: Hitchhiking
• Most location-based services about where you are• Hitchhiking is about the “busyness” of places
– “Is the café busy?”
– “How long are the lines at the airport?”
– “Where’s an empty room?”
– Is there any parking at the shopping district?
Project: Hitchhiking
• Estimate number of people in a place by counting the number of wireless devices there
• Periodically upload count + location to our servers• Other people can query our servers
Project: Hitchhiking
• How well does Hitchhiking work?
Project: Hitchhiking
• Privacy?– Upload anonymized counts only
– Upload from approved places only
– Our server shows “busyness” of a place only
• Advantages– Cheap, uses existing devices (everyone is a “sensor”)
– Deployable, don’t have to set up lots of new sensors
– Privacy
• What’s next?– Map visualizations
Lots of Large-Scale Mobile Apps
• Gawker Stalker
Lots of Large-Scale Mobile Apps
• One-way Matchmaking
Project: Hitchhiking
• Current implementation on laptops + wifi• Place Lab WiFi positioning system calculates location
– Unique WiFi MAC Address Latitude, Longitude
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–Works indoors and in urban canyons
–Works with encrypted nodes
–No special equipment–Privacy-sensitive–Rides the WiFi wave
Popular Concept Scenarios
Project: Hitchhiking
