A Topologically Optimal Internet

[Note: This item comes from friend Ed DeWath. DLH]

A Topologically Optimal Internet
Sep 30 2016

A Topologically Optimal Internet
Alan Huang, Ph.d. and Scott Knauer. Ph.d.

About the talk:
Current packet backbone networks are based on telephone, railroad, or highway networks. They were designed to minimize the total link length. Packet switched networks are different from circuit switched networks in that they should be designed to minimize the number of hops instead of the total link length. Minimizing the number of hops reduces the latency, power consumption, and cost. This also increases network efficiency by completely eliminating the “bypass” packets that needless pass through the routers.

In more detail, the number of hops can be reduced by 2X by converting the network into a toroid. The number of hops can be further reduced by recasting the network into N-dimensional hypercube or into a multistage network, such as a Perfect Shuffle or Banyan. The multistage networks can be made redundant by adding an extra stage. This increases the fault tolerance and reduces the fabric blocking of the network. The reduced fabric blocking increases the network’s ability to carry voice and video. Dense Wavelength Division Multiplexing (DWDM) channels on existing optical fiber links can be connected together to implement these topologies. The DWDM channels decouple the network topology from the geographical constraints. These topologies are compatible with all the layers of the OSI stack.

Slides:

Download the slides for this presentation in PDF format. The slides for this talk are slightly smaller than 18MB: http://ee380.stanford.edu/Abstracts/160928-slides.pdf

Video: 54:26 min

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