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Jean-Yves Le Boudec

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Publications associées (199)

The Optimal MAC Layer for Low-Power UWB is Non-Coordinated

Jean-Yves Le Boudec, Ruben Merz, Jörg Widmer, Alaeddine El Fawal

We consider the design of the MAC layer for low power, low data-rate, impulse-radio ultra-wide band (IR-UWB) networks. In such networks, the primary concern is energy consumption rather than rate efficiency. We explore several dimensions such as power cont ...

2006

A Robust Signal Detection Method for Ultra Wide Band (UWB) Networks with Uncontrolled Interference

Jean-Yves Le Boudec, Alaeddine El Fawal

We propose a novel detection method for non-coherent synchronization (signal acquisition) in multi-user UWB impulse radio (IR) networks. It is designed to solve the IUI (Inter-User Interference) that occurs in some ad-hoc networks where concurrent transmis ...

Institute of Electrical and Electronics Engineers2006

Congestion Control for Distributed Hash Tables

Jean-Yves Le Boudec, Karl Aberer, Fabius Klemm

Distributed Hash Tables (DHTs) provide a scalable mechanism for mapping identifiers to socket addresses. As each peer in the network can initiate lookup requests, a DHT has to process concurrently a potentially very large number of requests. In this paper, ...

IEEE2006

Method to Filter Electronic Messages in A Message Processing System

Jean-Yves Le Boudec, Slavisa Sarafijanovic

The present invention proposes a method to filter electronic messages in a message processing system, this message processing system comprising a temporary memory for storing the received messages intended to users, a first database dedicated to a specific ...

2006

A Network Coding Approach to Energy Efficient Broadcasting: from Theory to Practice

Jean-Yves Le Boudec, Jörg Widmer, Christina Fragouli

We show that network coding allows to realize energy savings in a wireless ad-hoc network, when each node of the network is a source that wants to transmit information to all other nodes. Energy efficiency directly affects battery life and thus is a critic ...

2006

On the benefits of network coding for wireless applications

Jean-Yves Le Boudec, Jörg Widmer, Christina Fragouli

2006

On the Stationary Distribution of Speed and Location of Random Waypoint

Jean-Yves Le Boudec

In ``Stationary Distributions for the Random Waypoint Mobility Model ...

2005

A Location Based Routing Method for Mobile Ad Hoc Networks

Jean-Yves Le Boudec, Ljubica Blazevic

Using location information to help routing is often proposed as a means to achieve scalability in large mobile ad-hoc networks. However, location based routing is difficult when there are holes in the network topology and nodes are mobile or frequently dis ...

2005

Effect of Interfering Users on the Modulation Order and Code Rate for UWB Impulse-Radio Bit-Interleaved Coded M-ary PPM

Jean-Yves Le Boudec, Ruben Merz

We consider the impact of multi-user interference on a bit-interleaved coded-modulation system with M-ary PPM (BIC M-ary PPM) in an impulse-radio ultra-wideband physical layer. In a realistic scenario such as an ad hoc network, the interference is inherent ...

2005

On the Long-Run Behavior of Equation-Based Rate Control

Jean-Yves Le Boudec, Milan Vojnovic

We consider unicast equation-based rate control, where, at some points in time, a sender adjusts its rate to f(p,r), where p is an on-line estimate of the loss-event rate observed by this source, r of the average round-trip time, and f is a TCP throughput ...

2005

Synchronizing Method for Impulse Radio Network

Jean-Yves Le Boudec, Alaeddine El Fawal

In IR (Impulse Radio) network, the conventional synchronization (also called signal acquisition) method becomes inefficient and results in a certain failure of synchronization when concurrent transmissions are allowed without controlling their powers. The ...

2005

Analysis of a Robust Reputation System for Self-Organized Networks

Jean-Yves Le Boudec, Jochen Mundinger

Self-organized networks require some mechanism to ensure cooperation and fairness. A promising approach is the use of decentralized reputation systems. However, their vulnerability to liars has not yet been analyzed in detail. In this paper, we provide a r ...

2005

Conditional Bit Error Rate for an Impulse Radio UWB Channel with Interfering Users

Jean-Yves Le Boudec, Ruben Merz

We consider a multi-user impulse radio UWB physical layer in a multipath environment. We propose a fast and efficient method to compute the conditional bit error rate (BER), given some realizations of the channels from source/interferer to destination, and ...

2005

On the Feasible Scenarios at the Output of a FIFO Server

Jean-Yves Le Boudec, Juan Echagüe

We consider the case of a FIFO multiplexer fed by flows that are individually constrained by piecewise linear concave arrival curves. We show that, contrary to what happens at the input, at the output not all valid scenarios in accordance with the worst ca ...

2005

A Joint PHY/MAC Architecture for Low-Radiated Power TH-UWB Wireless Ad-Hoc Networks

Jean-Yves Le Boudec, Ruben Merz, Jörg Widmer

Due to environmental concerns and strict constraints on interference imposed on other networks, the radiated power of emerging pervasive wireless networks needs to be strictly limited, yet without sacrificing acceptable data rates. Pulsed Time-Hopping Ultr ...

2005

Distributed Reputation Systems for Internet-based Peer-to-Peer Systems and Mobile Ad-Hoc Networks

Jean-Yves Le Boudec, Sonja Buchegger, Jochen Mundinger

Reputation systems are widely and successfully used in centralized scenarios. Will they work equally well, however, in decentralized scenarios such as Internet-based peer-to-peer systems and mobile ad hoc networks? ...

2005

Self-Policing Mobile Ad-Hoc Networks by Reputation

Jean-Yves Le Boudec, Sonja Buchegger

Node misbehavior due to selfish or malicious reasons or faulty nodes can significantly degrade the performance of mobile ad-hoc networks. To cope with misbehavior in such self-organized networks, nodes need to be able to automatically adapt their strategy ...

2005

Network coding for efficient communication in extreme networks

Jean-Yves Le Boudec, Jörg Widmer

Some forms of ad-hoc networks need to operate in extremely performance- challenged environments where end-to-end connectivity is rare. Such environments can be found for example in very sparse mobile networks where nodes ”meet” only occasionally and are ab ...

2005

Tradeoff Analysis of PHY-aware MAC in Low-Rate, Low-Power UWB networks

Jean-Yves Le Boudec, Ruben Merz, Jörg Widmer, Alaeddine El Fawal

We are interested in the design of physical-layer aware medium access control (PHY-aware MAC) for self-organized, low power, low data-rate impulse-radio ultra-wideband (IR-UWB) networks. In such networks, energy consumption is much more of a concern than a ...

2005

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