Performance Evaluation

Lecture Notes | Micro to Macro | Mobility Models | Palm

We are exploring methods a general applicability for the quantitative analysis of communication and information systems.

Performance Evaluation Lecture Notes

Model for analyzing jitter
The lecture notes are available for download from the performance evaluation course web site

From Micro to Macro

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State machine for one DCC MAC station
We found a mean field convergence result that explains fluid limits and gives a fast simulation method for a system of interacting objects.
Paper (pdf) Slides (ppt)

Mobility Models

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Intercontact Times

Two random waypoint users. Thick line shows large contact time
(With Milan Vojnovic and Thomas T. Karagiannis). We show that the distribution of intercontact times on all traces we could obtain shows a dichotomy: power law decay up to a time of the order of the mean of the distribution, then exponential decay. (Mobicom 2007 pdf ).

Random Trip Model

Fish in a bowl
The random trip model is a generic mobility model that generalizes random waypoint and random walk to realistic scenarios. It is implemented in ns2 and can be used without license. The implementation performs perfect initialization, i.e. the mobility model has no transient phase (with Milan Vojnovic and Santashil PalChaudhuri). The analysis of the random trip model allowed us to solve outstanding issues that arose when simulating the random waypoint.

Understand Perfect Simulation and Palm Calculus

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Understand Random Waypoint and how to simulate its stationary distribution easily. Discover Palm Calculus :

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