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Mesh Connectivity. 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. What is a mesh?.

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Presentation Transcript

Problem space
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


What is a mesh
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.


Application scenarios
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.


State of the art
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


Two architectures
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


Research questions 1
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


Research questions 2
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?


Success metrics
Success Metrics

  • One profitable quarter at one of the mesh startups

  • Whenever mesh becomes a viable alternative to Cable/DSL for average consumer.


Five ten year outlook
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.