Home. Participants. Meetings. Visits and Collaborations Publications

InFormAtioN theorY: New challenges and new interdisciplinary tools.



We describe the collaborations and cite the publications that resultedo, listed in details in the Publications section.
  1. TREC--Hypercom Design and analysis of routing in ad-hoc networks. Methodologies: IT (Jacquet, Muhlethaller) Stochastic Geometry (Baccelli). Resulted in a journal [1.1] and a conference [2.8] publication.
  2. EurecomAvignon—Maestro (INRIA)

o         Collaboration on stochastic games with decentralized information with applications to power control. Participants: Merouane Debbah (Eurecom) Konstantin Avratchenkov and Eitan Altman (INRIA) Rachid El-Azouzi (Avignon), as well as two students: Nicolas Bonneau (PhD student with one co-advisior, M. Debbah, from Eurecom, and another co-advisor, E. Altman, from INRIA)  and Daniel Sadoc Menasche (was in an internship at INRIA, under the guidance of K Avratchenkov and E Altman from INRIA and M Debbah from Eurecom).The cooperation resulted in one journal paper [2.1] and one conference paper [2.10] that received the 2nd Best Paper Award (IEEE Globecom 2007)

  1. Eurecom--Temics (M. Debbah, A. Roumy)

o         finding optimal wireless node density so that, if the nodes have correlated data, one can utilize the network as effectively as possible. Includes work by Postdoc (Kherani) and PhD student (Banerjee) financed by IFANY. Results published in [1.3]

  1. Eurecom--Maestro

o         Robust Waterfilling strategies for the fading channel. The worst case and average capacity are obtained. Tools: IT and Game Theory. Participants: M. Debbah, E. Altman and A. Suarez (joint PhD student). Results published in [2.2] and new results submitted in [3.2].

o         Routing in massively dense ad-hoc networks – limiting behaviour as the topology approaches a continuum.  Tools: non-atomic games. A joint paper appearead in Allerton 2007 [2.9]. E. Altman and M. Debbah are co-advisers a PhD student in that topic, Alonso Sylva, since mid 2007.

  1. INT--Maestro--France Telecom

o         Collaboration since mid 2006 on Design of congestion control protocols for the Internet, based on fountain codes. The latter can be used to render a connection reliable without need of the large overhead of the ACKs of TCP. Participants: C. Tijani, D. Kumar, E. Altman. Possible future collaboration with France-Telecom. A joint paper was submitted. New (November 2007): FOREWIN (Fountain Code-based Reliable Transport over Wireless Networks), a new collaborative project between Maestro and several groups among GET has been accepted on this issue and will be financed by GET. The coordinator is Dr T. Chahed (member of INT/GET in IFANY). This new project would not have existed without the collaboration initiated by IFANY.

o          Collaboration since end of 2006 on the analysis of joint uplink and downlink capacity in CDMA. One joint paper [2.12] appeared in Valuetools 2007 and another one submitted. Participants in the collaboration: T. Chahed (INT), E. Altman (Maestro) S. E. Elayoubi (France Telecom).

  1. Avignon Univ – Maestro

o         Collaboration on Evolutionary Game Theory applied to networking, since mid 2006. 3 papers [2.14]-[2.16] have appeared in conferences and another one [2.17] has been accepted to IEEE  INFOCOM 2008. Participants in this collaboration are R El-Azouzi and Y Hayel (Avignon), E Altman (INRIA) and Mr Hamidou Tembini who has been a PhD under the co-supervision of Dr R El-Azouzi (Avignon Univ) and E Altman (INRIA, Maestro group).

o         Collaboration on security issues related to hiding information, formulated as a zero sum game with a particular (nested) information structure. The work involved in addition a visiting prof, Saswati Sarkar, who was financed by IFANY during 5 months. The results of the cooperation will appear in the proceedings of the mini-symposium of IEEE Infocom 2008, [2.18].

  1. France-Telecom – TREC

o          The computation tools available in the literature of the capacity of the wireless local area network IEEE 802.11 (and more generally of CSMA systems) all use an independence assumption that states that the transmission rate of a single mobile does not influence the aggregated attempt rate of transmissions by other mobiles, which can be modelled as a Poisson process or as a Bernoulli process (if discrete time is used). The justification of the assumption was missing and its validity was thus questionable. The collaboration between C. Bordenave (TREC) and A. Proutiere (France Telecom) together with D MacDonald (who was on Sabbatical with TREC) resulted in an outstanding result that justifies the independence assumption and proves that it indeed holds asymptotically as the number of mobiles is large [2.19]. Related techniques were used in [3.3].

  1. Armor – Maestro- Avignon

o         The collaboration focused on game theoretic approaches for traffic management using pricing. The participants are R El-Azouzi (Avignon) B Tuffin (ARMOR) and E Altman (MAESTRO). A paper [2.5] was published in the proceedings of the valuetools conference, 2007. A joint paper [1.3] appeared in the journal Computer Networks in 2006

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Visits and joint supervision of students