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NASA succesfuly tests deep space Internet

Posted on Thursday, November 20 2008 @ 02:25:41 CET by


AP reports NASA successfully conducted the first test of a deep space communications network modeled on the Internet:
"This is the first step in creating a totally new space communications capability, an interplanetary Internet," Adrian Hooke, NASA's manager of space-networking architecture, technology and standards, said in a statement.

The US space agency said Jet Propulsion Laboratory engineers used software called Disruption-Tolerant Networking, or DTN, to transmit dozens of space images to and from a NASA spacecraft some 20 million miles (32.4 million kilometers) from Earth.

NASA said the software protocol, which must be able to withstand delays, disruptions and disconnections in space, was designed in partnership with Vint Cerf, a vice president at Internet search giant Google.

DTN sends information using a method that differs from the normal Internet's Transmission-Control Protocol/Internet Protocol, or TCP/IP, communication suite, which Cerf co-designed, NASA said.

Unlike TCP/IP, DTN does not assume a continuous end-to-end connection, NASA said, noting that glitches can happen when a spacecraft moves behind a planet, or when solar storms and long communication delays occur.

It said the delay, for example, in sending or receiving data from Mars takes between three-and-a-half minutes and 20 minutes at the speed of light.



 



 

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