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Publications associées (28)

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Cross-Layer Based Analysis of Multi-Hop Wireless Networks

Tarik Tabet

In this work, we revisit classical packet radio networks with a modern treatment of physical-layer (PHY) procedures, medium-access (MAC) and geographic channel-driven routing protocols. Our network model assumes that nodes are randomly distributed on the p ...

2010

Self-Synchronizing Properties of CSMA Wireless Multi-hop Networks

Patrick Thiran, Olivier Dousse

We show that CSMA is able to spontaneously synchronize transmissions in a wireless network with constant-size packets, and that this property can be used to devise efficient synchronized CSMA scheduling mechanisms without message passing. Using tools from ...

2010

Self-Organization Properties of CSMA/CA Systems and Their Consequences on Fairness

Patrick Thiran, Olivier Dousse, Mathilde Durvy

Decentralized medium access control schemes for wireless networks based on CSMA/CA, such as the IEEE 802.11 protocol, are known to be unfair. In multihop networks, they can even favor some links to such an extent that the others suffer from virtually compl ...

Institute of Electrical and Electronics Engineers2009

Efficient MAC in cognitive radio systems: A game-theoretic approach

Jean-Pierre Hubaux, Mark Felegyhazi, Mario Cagalj

In this paper, we study the problem of efficient medium access control (MAC) among cognitive radio devices that are equipped with multiple radios and thus are capable of transmitting simultaneously at different frequencies (channels). We assume that radios ...

2009

Cooperative coding on orthogonal information networks

The focus of this thesis is on communication over cooperative information networks. In the first half of the thesis, we consider lossy source coding problems where a relay assists in the communication of a source stream between two terminals. The following ...

EPFL2009

On the Fairness of Large CSMA Networks

Patrick Thiran, Olivier Dousse, Mathilde Durvy

We characterize the fairness of decentralized medium access control protocols based on CSMA/CA, such as IEEE 802.11, in large multi-hop wireless networks. In particular, we show that the widely observed unfairness of the protocol in small network topologie ...

Institute of Electrical and Electronics Engineers2009

On uncoordinated wireless ad-hoc networks : data dissemination over WIFI and cross-layer optimization for ultra wide band impulse radio

Alexandre Fawal

Emerging pervasive wireless networks, pocket switched networks, Internet of things, vehicular networks and even sensor networks present very challenging communication circumstances. They might involve up to several hundreds of wireless devices with mobilit ...

EPFL2009

Border effects, fairness, and phase transition in large wireless networks

Patrick Thiran, Olivier Dousse, Mathilde Durvy

IEEE Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008