May 28, 2018

Collector un nombre inconnu de coupons

  • Jacquet P.
  • Lamail M.
  • Mathieu F.

Dans les algorithmes de cartographie d'Internet, l'un des problemes cl'e `a r'esoudre est celui de la d'ecouverte des differentes interfaces de sorties d'un routeur en cas dequilibrage de charge: combien de sondes doit-on envoyer tester la connexion pour etre raisonnablement certain d'avoir d'ecouvert toutes les interfaces ? Une des solutions existante est une variante du probleme du collecteur de coupon qui consiste 'a associer 'a chaque nombre d'interfaces d'ecouverts un nombre de sondes au-del'a duquel on consid'ere que l'on peut s'arreter. Dans cet article, nous donnons une formule close pour l'association et prouvons sa quasi-optimalit'e.

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Fair Dynamic Spectrum Management for QRD-Based Precoding with User Encoding Ordering in Downstream G.fast Transmission

In next generation DSL networks such as G.fast, employing discrete multi-tone transmission in high frequencies up to 212 MHz, the crosstalk among lines reaches very high levels. To precompensate the crosstalk in downstream transmission, QRD-based precoding has been proposed as a near-optimal dynamic spectrum management (DSM) technique. However, the performance ...

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