Publications de Mark Felegyhazi

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

Jean-Pierre Hubaux, Mario Cagalj, Mark Felegyhazi

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

Optimal Pricing Strategy for Wireless Social Community Networks

Jean-Pierre Hubaux, Mark Felegyhazi, Seyyed Amin Mazloumian

Wireless social community operators rely on subscribers who constitute a community of users. The pricing strategy of the provided wireless access is an open problem for this new generation of wireless access providers. In this paper, using both analytical ...

ACM2008

On Wireless Social Community Networks

Jean-Pierre Hubaux, Julien Freudiger, Mark Felegyhazi, Peter Marbach

Wireless social community networks are emerging as a new alternative to provide wireless data access in urban areas. By relying on users in the network deployment, a wireless community can rapidly deploy a high-quality data access infrastructure in an inex ...

2008

Wireless Social Community Networks: A Game-Theoretic Analysis

Jean-Pierre Hubaux, Julien Freudiger, Mark Felegyhazi, Peter Marbach

Wireless social community networks formed by users with a WiFi access point have been created as an alternative to traditional wireless networks that operate in the licensed spectrum. By relying on access points owned by users for access, wireless communit ...

2008

Revocation Games in Ephemeral Networks

Jean-Pierre Hubaux, Mark Felegyhazi, Maxime Raya

A frequently proposed solution to node misbehavior in mobile ad hoc networks is to use reputation systems. But in ephemeral networks - a new breed of mobile networks where contact times between nodes are short and neighbors change frequently - reputations ...

2008

Mix-Zones for Location Privacy in Vehicular Networks

Jean-Pierre Hubaux, Julien Freudiger, Mark Felegyhazi, Maxime Raya, Panagiotis Papadimitratos

Vehicular Networks (VNs) seek to provide, among other applications, safer driving conditions. To do so, vehicles need to periodically broadcast safety messages providing precise position information to nearby vehicles. However, this frequent messaging (e.g ...

2007

Non-cooperative Multi-radio Channel Allocation in Wireless Networks

Jean-Pierre Hubaux, Mario Cagalj, Mark Felegyhazi, Shirin Saeedi Bidokhti

Channel allocation was extensively studied in the framework of cellular networks. But the emergence of new system concepts, such as cognitive radio systems, has brought this topic into the focus of research again. In this paper, we study in detail the prob ...

2007

Non-cooperative behavior in wireless networks

Mark Felegyhazi

Existing cellular networks are centrally managed and require a tremendous initial investment. With the advancement of new wireless technologies, the operators of traditional networks have to face new competition. New technologies make it possible to provid ...

EPFL2007

Border Games in Cellular Networks

Jean-Pierre Hubaux, Diego Dufour, Mario Cagalj, Mark Felegyhazi

In each country today, cellular networks operate on carefully separated frequency bands. This separation is imposed by the regulators of the given country to avoid interference between these networks. But, the separation is only valid within the borders of ...

2007

Wireless Operators in a Shared Spectrum

Jean-Pierre Hubaux, Mark Felegyhazi

So far, cellular networks have been operated in "private" frequency bands. But recently, several researchers and legislators have argued in favor of a more flexible and more efficient management of the spectrum, leading to the possible coexistence of sever ...

2006

Multi-radio Channel Allocation in Competitive Wireless Networks

Jean-Pierre Hubaux, Mario Cagalj, Mark Felegyhazi

Channel allocation has been extensively studied in the framework of cellular networks, but the emergence of new system concepts, such as cognitive radio systems, bring this topic into the focus of research again. In this paper, we provide a formal analysis ...

2006

Nash Equilibria of Packet Forwarding Strategies in Wireless Ad Hoc Networks

Jean-Pierre Hubaux, Levente Buttyan, Mark Felegyhazi

In self-organizing ad hoc networks, all the networking functions rely on the contribution of the participants. As a basic example, nodes have to forward packets for each other in order to enable multi-hop communication. In recent years, incentive mechanism ...

2006

Cooperative Packet Forwarding in Multi-Domain Sensor Networks

Jean-Pierre Hubaux, Levente Buttyan, Mark Felegyhazi

Sensor networks are large scale networks of low-power devices that collaborate in order to perform a given task. The sensors are limited in battery energy, capacity and computational power. In recent years, researchers have proposed several protocols for s ...

2005