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Dive into the research topics where Jean-Marc Berthaud is active.

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Featured researches published by Jean-Marc Berthaud.


IEEE ACM Transactions on Networking | 2000

Time synchronization over networks using convex closures

Jean-Marc Berthaud

This paper presents a general time synchronization algorithm that analyzes the time offset between any two computers clocks in a network and its evolution, by using mathematical topology properties. It builds a conversion function that produces precise and guaranteed bounds for each time conversion, and which provides accurate time synchronization. It is able to automatically adjust the observation process so as to maintain the error bound within some specified limit. It does not require adjustments to local clocks, and it features a way of filtering observation data based on a criterion of usefulness to improve precision, thus discarding only useless information. Advantages over approaches using other tools to filter out and analyze observation data (mean and variance, linear regression, midpoint functions, etc.) are exposed. Special attention is given to assessing the uncertainties and errors made in the observation process, and to their propagation in the estimation processes. The developed technique allows one to globally achieve a better precision than what has been reached on each single observation, given some conditions of operation that are explained.


Archive | 1997

Dynamic bandwidth estimation and adaptation in high speed packet switching networks

Jean-Marc Berthaud; Pierre-Andre Foriel; Claude Galand; Stephane Lengelle; Laurent Nicolas


Archive | 2000

Method of upgrading a program using associated configuration data

Claude Basso; Jean-Marc Berthaud; Alain Dorel; Jean-Pierre Rigaud; Michel Susini; Fred Trucco


Archive | 2002

Method of synchronizing firewalls in a communication system based upon a server farm

Jean-Marc Berthaud; Pascal Chauffour; Jean-Claude Dispensa; Valerie Mahe


Archive | 2002

Method of preserving symmetrical routing in a communication system based upon a server farm

Jean-Marc Berthaud; Pascal Chauffour; Jean-Claude Dispensa; Valerie Mahe


Archive | 2005

Qualifying means in method and system for managing service levels provided by service providers

Jean-Marc Berthaud; Joel Dennis Dalsky


Archive | 2000

System for automatically determining a number of power supplies are required by managing changes of the power requirements in a power consuming system

Jean-Marc Berthaud; Jean-Francois Fauh


Archive | 2000

Method of automatically determining whether power consumption devices can be powered up in a power consuming system

Jean-Marc Berthaud; Jean-Francois Fauh


Archive | 2002

System for monitoring the path availability in a communication system based upon a server farm

Jean-Marc Berthaud; Jean-Claude Dispensa; Eric Lebrun; Jean-Bernard Schmitt


Archive | 2005

Method and system for managing service levels provided by service providers

Jean-Marc Berthaud; Melissa J. Buco; Rong N. Chang; Joel Dennis Dalsky; Shih-Chung Fang; Laura Z. Luan; Christopher Ward

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