Abs t rac t We define, for an overlay built on top of an ad hoc network, a simple criterion for neighbourhood: two overlay nodes are neighbours if and only if there exists a path between them of at most R hops, and R is called the (overlay) neighbourhood range. A small R may result in a disconnected overlay, while an unnecessarily large R would generate extra control traffic. We are interested ...

Freenet, a fully decentralized publication system designed for censorship-resistant communication, exhibits long delays and low success rates for finding and retrieving content. In order to improve its performance, an in-depth understanding of the deployed system is required. Therefore, we performed an extensive measurement study accompanied by a code analysis to identify bottlenecks of the exi...

This paper analyzes fast adaptive traffic engineering from a feedback control perspective. We provide a model that characterizes the system parameters’ effects on the performance of the dynamic routing system. This allows quantitative analysis of adaptive traffic engineering control laws and its design parameter choices. We then specialize the general framework in two representative network top...

This chapter surveys network-level approaches to conserve energy in sensor networks. We consider protocols for transmission power control, media access control, topology control, and energy-aware routing, surveying relevant literature and describing approaches that have been considered.

This talk re-examines some of the evolving interaction between hyperbolic geometry and low-dimensional topology, focussing in particular on some contributions of Murray Macbeath to surface topology.

We provide an axiomatic characterization of information fusion, on the basis of which we define an information fusion network. Our construction is reminiscent of tangle diagrams in low dimensional topology. Information fusion networks come equipped with a natural notion of equivalence. Equivalent networks ‘contain the same information’, but differ locally. When fusing streams of information, an...