A paper from Microsoft Research UK. The focus is on a topology named CamCube, which is a 3D torus with no switch node. All nodes in the topology is connected to 6 other nodes to form a 3D lattice. Nodes are addressed by a 3D coordinate, $(x,y,z)$. Routing is done by source routing.

There is a core routing service to help finding the route between source and destination. It handles link failures so that it can route around the failures. Its routing is non-deterministic. There are usually several shortest path from a node to the destination. A packet is forwarded to a direction with least local load. This is similar to hot-potato routing with shortest-path constraint.

In the paper, authors argue that with this single routing, the performance (both application and network level) is not optimal. The paper showed various application-specific routing protocols that aimed at fulfilling the need of different applications which the default routing can’t do. Though simulation, the paper showed the improvement in performance.

## Bibliographic data

@inproceedings{
author = "Hussam Abu-Libdeh and Paolo Costa and Antony Rowstron and Greg O'Shea and Austin Donnelly",
title = "An Algorithm for Nudity Detection",
booktitle = "Proc. SIGCOMM",
year = "2010",
}