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Accommodating the Disruption-Tolerant Network Paradigm within GENI

Accommodating the Disruption-Tolerant Network Paradigm within GENI. Mostafa Ammar College of Computing Georgia Institute of Technology Atlanta, GA. DTN. The Rise of DTNs. The Main Message. DTNs: Where mobility is your friend A novel realistic network paradigm

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Accommodating the Disruption-Tolerant Network Paradigm within GENI

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  1. Accommodating the Disruption-Tolerant Network Paradigm within GENI Mostafa Ammar College of Computing Georgia Institute of Technology Atlanta, GA DTN

  2. The Rise of DTNs

  3. The Main Message • DTNs: Where mobility is your friend • A novel realistic network paradigm • DTNs: The rest of the ICEBERG • MANETS are really a special case! • Challenge for GENI: So Many Wireless Networks and so little time. • The goal should be the entire WAM space

  4. Sparse Wireless Networks • Disconnected • By Necessity • By Design (e.g. for power considerations) • Mobile • With enough mobility to allow for some connectivity over time • Data paths may not exist at any one point in time but do exist over time

  5. Mobility-Assisted Data Delivery:A New Communication Paradigm • Mobility used for connectivity • New Forwarding Paradigm Store Carry for a while forward • Special nodes: Transport entities that are not sources or destinations

  6. Epidemic Routing

  7. Epidemic Routing

  8. Epidemic Routing

  9. Epidemic Routing message is delivered…

  10. SWIM

  11. Vehicles on Highways Networks Source Destination

  12. Vehicles on Highways Networks Source Destination

  13. Vehicles on Highways Networks Source Destination

  14. DakNet(Pentland, Fletcher, and Hasson)

  15. MF S S M M D D Message Ferrying System (cont.) MF

  16. The DTN paradigm • Mobility-Assisted Data Delivery • FINALLY! A realistic mobile wireless network paradigm • Everything looks familiar but this is a truly different environment • Techniques developed have wide applicability • Fertile Ground for both networking problems and novel application paradigms

  17. DTNs and GENI • DTNs are an important class of wireless/mobile networks • Should accommodate the DTN paradigm within the GENI facility • Is this Yet Another Network? • Is this a distraction

  18. The Wireless/Mobile Network Space • Need to distinguish • Mobile/Wireless Environment • Techniques we apply to achieve communication

  19. Some Terminology • A Space Path: A multi-hop path where all the links are active at the same time • A Space/Time Path: A multi-hop path that exists over time • NOTE: S path is a special case of S/T path

  20. Example A Space Paths Network

  21. Example A No Path Network

  22. Example A Space Time Path

  23. Example A Hybrid Network

  24. Space/Time Paths No (Space/Time) Paths Space Paths The Wireless and Mobile (WAM) Space High “Mobility” Hybrid Environments Low Low High Node Density

  25. Space/Time Paths MF is applicable for the entire space MF is necessary here Epidemic Routing necessary here Epidemic Routing usable here Hybrid Environments No (Space/Time) Paths Traditional MANET solutions apply here Space Paths Mapping Solutions to WAM Space High “Mobility” Low Low High Node Density

  26. DTNs in GENI • Will come naturally if GENI facility accommodates entire wireless/mobile network space. • Challenges: • Formalizing/parametrizing Space (including mobility modeling) • Accommodating mobility in facility (intrinsic and controlled) • Ability to navigate WAM space in experimental design

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