ComEx, Intelligent Network Structures
Contact : Ghaya Rekaya-Ben Othman
Computer networks, and especially the Internet, have become a fundamental infrastructure, with huge impact on our everyday life. Fixed and mobile networks as well as power grids are becoming ever larger, encompassing hundreds of millions of nodes. These networks involve various technologies and interact recursively with one another. As a result, the infrastructure is so large and diverse that it is now of a distributed nature: each component has many parameters that should be tuned to achieve a proper behavior of the whole system. Hence, a problem is how distributed algorithms and decisions can result in a fair equilibrium.
Moreover, new communication systems are constantly proposed for standardization, with the goal of using the available bandwidth better. Large improvements are expected, provided that the design becomes more global, with a possible relaxation of the separation between layers. Cross-layer design is a first step in this direction, but more flexibility is needed, which requires new tools and paradigms. Cooperation and auto-reconfigurability of distributed networks are such paradigms that are already widely studied. Finally, full benefits will be obtained if the distributed software framework (middleware) is designed with functionality and performance in mind. This is addressed via 3 tasks: Understanding the ultimate performance of good models of the situations of interest (Task 1); Global design of network architectures (Task 2); Terminal-centric design of networks (Task 3).
Task 1: Network Information Theory : Coding, Security and CachingContact: Sheng Yang, Supelec
Partners involved: CEA LIST, INRIA Paris- Rocquencourt, LTCI,SAMOVAR, E3S.
Task 2: Future Access Networks : Cloud, Ran and Optimization problemsContact: Kinda Khawam, LRI
Partners involved: LRI, CEA LIST, INRIA Paris-Rocquencourt, LTCI, SAMOVAR.
Collaborations: F. Baccelli and B. Błaszczyszyn (TREC team, INRIA & ENS, labex SMP6).
Task 3: Distributed Networks : Storage, Computing, Security and PrivacyContact:Ghaya Rekaya-Ben Othman, Telecom ParisTech
Task 4: Optical Communication : Signal Processing, Coding and NetworksContact: Philippe Ciblat, Telecom ParisTech
Optical communications has undergone a revolution ten years ago with the development of coherent transceivers. This revolution was necessary due to the huge increase of data rate demands in core networks. Even if the increase is pursuing, the optical-fiber communications need to provide new solutions to prevent congestion in the overall Internet. The main new ways are twofold: on the one hand, by using more parallel channels through multi-mode and multi-core fibers. In order to be scalable (large filter, massive mode), new paradigms in coding and decoding are required.
On the other hand, by mitigating the nonlinear effects especially by the new tool of Nonlinear Fourier transform and by using involved decision-feedback receivers. As a conclusion, mimicing solutions for wireless communications are now not sufficent to improve optical-fiber communications, and really-new above-mentioned solutions have to be developed.
Contact: Philippe Ciblat, Telecom ParisTech
Partners involved: DAVID, LI-PaRAD, LRI, CEA LIST, LIX, LTCI, SAMOVAR, L2S.
- CEA LIST
Related PhD thesis funded by DigiCosme