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Mesh Connectivity

Mesh Connectivity

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Mesh Connectivity

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  1. Mesh Connectivity

  2. Problem Space • Is scalability important? • Yes. • What happens if you put too many people on the mesh. • How do you separate meshes? • How to define borders? • Define “blob”s that are well-behaved • Or, define protocols that work without boundaries

  3. What is a mesh? • One mesh or several? • Can’t limit to one. • A mesh is a collection of nodes that have compatible hardware and software and can potentially talk to one another.

  4. Application Scenarios • Good wired infrastructure is available. • What are the applications? • Neighborhood networks seems dubious. • Wired infrastructure not developed • Internet access • Developing world scenarios • WLL phones • We are not considering in-home meshes • Providing less functionality at lower cost may not work, unless cost is very low.

  5. State of the art • Summarized by the panel. • Commercial companies: Tropos, Mesh networks • Grassroot efforts: Seattle wireless • All are carefully planned, roughly 100 nodes each • Do not interoperate • Not enough traffic data • Most are on WiFi because they are cheap

  6. Two architectures • Mesh is just a means for broadband access • “One true mesh” • Must be able to route to any node in the mesh networks

  7. Research Questions: 1 • New technologies (capacity working group’s output) • Directional antennas • Multiple radios • Multiple channels • 802.16? • What if time synchronization becomes free? (i.e. cheap GPS) • Figuring out when to use Internet as a “middle” hop to talk to another mesh node (when available) • How to find the the best ITAP? • One you have best mesh path to • One that has best internet pipe • Incorporating quality of internet access into mesh routing metrics

  8. Research Questions: 2 • Addressing: Multi-homing or not? • Is mobile IP the solution? • Scalability of routing table large meshes • No need to worry • Hierarchical routing? • Aggregation of routing? • Keep track of only a limited number of neighbors?

  9. Success Metrics • One profitable quarter at one of the mesh startups • Whenever mesh becomes a viable alternative to Cable/DSL for average consumer.

  10. Five/Ten year outlook • Mesh won’t be a “success” in five years. • Products (antennas etc.) are not currently available • But several small mesh networks with tens of thousands of users (total) • It will be on the way to success in 10 years.