Mobile%20Encounter%20Networks%20and%20Their%20Applications%201st%20IEEE%20International%20Peer-to-Peer%20for%20Handheld%20Devices%20Workshop%20IEEE%20CCNC,%20Las%20Vegas,%2012th%20of%20January%202007

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Mobile Encounter Networks and Their
Applications1st IEEE International Peer-to-Peer
for Handheld Devices WorkshopIEEE CCNC, Las
Vegas, 12th of January 2007

• Niko Kotilainen, research student,
  niko.kotilainen_at_jyu.fi
• With co-authors Oleksiy Volovikov, Timo Juonoja,
  Matthieu Weber, Mikko Vapa and Jarkko Vuori
• Department of Mathematical Information Technology
• University of Jyväskylä, Finland
• www.mit.jyu.fi/cheesefactory

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Mobile Encounter Networks

• Very sparsely connected P2P networks
• No multi-hop capabilities
• Emerge when mobile devices come across each other
  and communicate
• Single information exchanges result in a
  diffusion of information
• Users physically carry information to other
  devices

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Information Diffusion
R1
R1 R2
R1
R2
R2
R2 R1
R1 R2
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Advantages and Disadvantages

• Scalable
• Robust
• No need for infrastructure
• Free communication medium
• No real-time querying because of the push type
  of the network
• Power consumption even when not actively using
  the applications

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BlueCheese
App 2
Application 1

• Prototype mobile encounter network middleware
• Provides applications a simple API for exchanging
  information with other devices running the same
  app
• Programmed in C and runs on Symbian S60 devices

BlueCheese
Bluetooth (RFCOMM, L2CAP, SDP)
Other BlueCheese Devices
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BlueCheese Measurement Results (1/3)
Bluetooth device discovery time
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BlueCheese Measurement Results (2/3)
Bluetooth connection establishment time
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BlueCheese Measurement Results (3/3)
Power consumption ratios
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Applications Gasoline Price Comparison System

• Collects gasoline price information when a user
  fuels his car
• Price data is diffused to the network
• Enables users to compare the prices from several
  gas stations nearby
• Prototype built on top of BlueCheese

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Other Application Ideas

• Other price comparison services
• Joke Service
• Event Service
• Newspaper Service

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Conclusions and Future Work

• Mobile Encounter Networks
• are not suitable for all applications
• provide clear benefits in some applications
• Future work idea Mobility Assisted Routing

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