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Internet galactique -- Cafe Numerique

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Cette semaine, le Café Numérique vous propose de vous plonger la tête dans les étoiles. L’espace est vaste et méconnu, mais ce n’est pas une excuse pour ne pas y avoir accès à Internet ! Il y a 10 ans, le Jet Propulsion Laboratory de la NASA a uni ses forces avec Vint Cerf (« Père d’Internet ») afin de développer un nouveau protocole de communication. Celui-ci se base sur TCP/IP que nous avons l’habitude d’utiliser sur Terre, mais a été spécialement adapté pour fonctionner dans l’espace. Les contraintes de temps de réponse dues à la distance y sont en effet très différentes.

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Internet galactique -- Cafe Numerique

  1. 1. L'Internet Galactique Carlos Peña González Café Numérique Bruxelles S02#27 L’Internet Galactique : la conquête des étoiles 06.04.2011
  2. 2. #CAFENBXL L'Internet Galactique Pour Carlos Peña González L'Internet Galactique Pour Carlos Peña González À côté de son engagement dans l’organisateur du Café Numérique, Carlos a développé une activité au tour de nouvelles technologies tout sa vie professionnelle, comme consultant et analyste. Il a développé des applications de Réalité Virtuelle avec le DK2 d’Oculus et dans les mondes numériques comme Second Life, OpenSim, Teleplace. C’est aussi un écrivain de romans de Science Fiction. – https://twitter.com/Wopper_fr
  3. 3. Qu'est-ce que l'Internet Galactique ?
  4. 4. L'Internet Galactique : la vision de la Science Fiction
  5. 5. L’Internet Galactique dans la Science Fiction : Star Wars Il existe dans l’univers de Star Wars un réseau de communication en temps réel couvrant toute la galaxie. Il permet même la visioconférence.
  6. 6. L’Internet Galactique dans la Science Fiction : Mass Effect Dans les romans et les jeux vidéo de Mass Effect existent les « relais cosmodésiques », une technologie prothéenne permettant de se déplacer instantanément d'un relais à un autre, pouvant se trouver à l'autre bout de la Voie Lactée.
  7. 7. Extranet : L’Internet Galactique de Mass Effect • La communication en temps réel est possible en utilisant des balises, de petits relais cosmodésiques, trouvés dans toute la galaxie. • L'information est envoyée à la balise de communication la plus proche au moyen d'un laser. • On génère ainsi un couloir connecté par un champ de masse dans lequel l'information circule. • Pour qu'il fonctionne il faut se trouver à moins d’une moitié de seconde-lumière (150.000 km) de la balise.
  8. 8. Extranet : L’Internet Galactique de Mass Effect Les messages des milliards d'utilisateurs de ce réseau à la bande passante finie sont envoyés via des paquets avec différentes priorités. • La priorité maximale est réservée à la Citadelle et aux Spectres. • Ensuite viennent les Gouvernements et les militaires. • Suivent les médias. • Enfin les utilisateurs particuliers achètent la largeur de bande restante aux entreprises d'Extranet.
  9. 9. L'Internet Galactique : la réalité scientifique
  10. 10. Projet de l’Internet Galactique Il y a 10 ans, le Jet Propulsion Laboratory de la NASA a uni ses forces avec Vint Cerf ("Père d'Internet ") pour développer un protocole de communication semblable à ceux que nous utilisons sur Terre (tels que TCP/IP), mais créé spécialement pour une utilisation dans l'espace.
  11. 11. Problèmes à résoudre 1. Le délai : L'espace est trop grand pour obtenir une communication relativement immédiate avec la technologie actuelle. 2. Le mouvement des astres : Les planètes se meuvent, de même que les satellites. Actuellement une équipe de communication spatiale doit être "en mire vers la Terre" pour que nous puissions recevoir son information.
  12. 12. Comment résoudre ces problèmes ? Le protocole sera basé sur un système tolérant aux interruptions et aux retards, qui rendra la communication beaucoup plus fluide, en permettant de transmettre une plus grande quantité de données dans ces situations extrêmes.
  13. 13. Le protocole DTN (Delay Tolerant Networking) • Le réseau galactique de la NASA n'est pas connecté en permanence : quand la connexion se perd, par exemple à cause des orages solaires ou des éclipses planétaires, le nœud de communication conserve l'information obtenue jusqu'à ce que la connexion soit rétablie. • Le protocole doit générer automatiquement les commandes nécessaires pour spécifier quelles données envoyer, quand et où.
  14. 14. Premiers essais Les tests ont commencé en novembre 2008 avec deux communications par semaine entre le vaisseau spatial Epoxi et neuf nœuds qui simulent des centres spatiaux en opération.
  15. 15. Le premier noeud de l'Internet Galactique Il a été installé dans la Station spatiale Internationale ISS. Kevin Glifford, employé de BioServe (la compagnie qui développe les ordinateurs de l'ISS) a annoncé que cette nouvelle technologie a déjà permis de multiplier par quatre la vitesse de transmission de l'information vers la station.
  16. 16. Le futur La NASA pense mettre en application l'Internet Galactique, en utilisant le protocole DTN, dans des vaisseaux futurs dès 2011. Dans un futur proche on pourra échanger de l'information entre la Terre, des vaisseaux spatiaux et des astronautes, presque automatiquement, en créant un véritable Internet interplanétaire.
  17. 17. Merci beaucoup à tous pour votre présence et spécialement à l’EPN!!!
  18. 18. Crédits: Textes et illustrations de http://www.neoteo.com Image de fond de la galaxie de Johnny (Sirius) y Jorge Image « Tierra y Luna » de Fotorapid sur http://www.pulsame.com/

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