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Tuesday, July 07, 2009

PLANETARY INTERNET



The Interplanetary Internet already has its first permanent node on board the International Space Station (ISS). Naturally, it doesn't use the terraqueous protocol internet: Transfer Continuous Protocol/Internet Protocol (TCP/IP), because it is not designed to support interruptions in the communications. Contrarily to the TCP/IP that uses cables or NASA's Deep Space Network that uses terraqueous radio antennas to communicate with space probes, the interplanetary internet uses nodes and the Protocol: Disruption Tolerant Networking (DTN), adapted to interruptions of transmission of data.

In the space communications suffer retards of 3-20 minutes due to the concealment of the probes for planets, flaws in the sources of power, solar storms, variable distances among planets as they are mobilized, retards due to enormous interplanetary distances, problems resolved by means of storage of data in each DTN node, until being able to be send automatically to another node. The first successful connection DTN was carried out in November/2008 between terraqueous receivers and those of the spaceship Epoxi of the Nasa, simulating a transmission (pictures of Mars and its Moon Phobos), between Earth and Mars. It is expected that in the future numerous ships will be employees as nodes.

INTERNET INTERPLANETARIO

El Internet Interplanetario ya tiene su primer nodo permanente a bordo del International Space Station (ISS). Naturalmente, no emplea el Protocolo de internet terráqueo : Transfer Continuous Protocol/Internet Protocol (TCP/IP), porque este, no está diseñado para soportar interrupciones en las comunicaciones. A diferencia del TCP/IP que usa cables o del NASA's Deep Space Network, que usa antenas de radio terráqueas para comunicarse con sondas espaciales, el internet interplanetario emplea nodos y el Protocolo : Delay Tolerant Networking (DTN), adaptado a interrupciones de trasmisión de datos.

Sucede que en el espacio las comunicaciones sufren retardos de 3-20 minutos debido al ocultamiento de las sondas por planetas, fallas en las fuentes de poder, tormentas solares, distancias variables entre planetas a medida que se movilizan, retardos por las enormes distancias interplanetarias, problemas resueltos mediante el almacenamiento de datos en cada nodo DTN, hasta poder ser enviaiados a otro nodo, automáticamente. La primera conexión DTN exitosa fué llevada a cabo en Noviembre/2008 entre receptores terráqueos y los de la nave Epoxi de la Nasa, simulando una trasmisión (fotos de Marte y su Luna Fobos), entre la Tierra y Marte. Se espera que en el futuro numerosas naves serán empleadas como nodos.

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