Visualization of Floating Content with ONE

In a floating content system, nodes collectively store and disseminate information content relevant to a certain geographical region. This requires that enough nodes visit the region, referred to as the anchor zone, or the content will be permanently lost (say it "sinks"). The animation on the right illustrates the floating content system in action:
  • Area corresponds to a 4500m × 3500m region in downtown Helsinki, which constraints the movement patterns.
  • Moving dots correspond to mobile users (or their devices)
  • Circles corresponds to anchor zones of a dynamically created information content.
  • The nodes collaborately replicate the content within the zone so that it "floats".
  • Color of the circles and nodes indicates the information content.
  • Generally, we are interested in determining the conditions under which the floating content scheme is feasible, which depends on
    • Mobility pattern and node density in particular
    • Size and shape of the anchor zone
    • Replication parameters (cf. cache replacement when limited storage and multiple messages)
    • etc...
This simulation has been done with the ONE simulator. There is also a java applet that demonstrates the floating content in a fixed anchor zone.
simulation model