It’s been a long time coming, but DTN is finally live on the International Space Station.
Here is the official NASA announcement:
DTN has been used for communication to ISS scientific payloads since May, 2010. This marks the conversion to DTN for all data communications with ISS, including all operational communications.
An interesting article on the ION distribution of DTN: “The Interplanetary Internet Implemented on the GENI Testbed” can be found at: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7417313&isnumber=7416057 One of the key findings of this research was that implementing and IPN with multiple cross-links for communications to Mars would increase transmission of data by 46%!
GENI (Global Environment for Network Innovations) provides a virtual laboratory for networking and distributed systems research and education. More info available at: https://www.geni.net
Here is the abstract:
Abstract: Interplanetary Internet or Interplanetary Networking is envisaged as a space network which interconnects spacecrafts, satellites, rovers and orbiters of different planets and comets for efficient exchange of scientific data such as telemetry and images. In this paper, we implement a layout of the Interplanetary Internet (IPN) with the Interplanetary Overlay Network (ION) software module that uses Contact Graph Routing (CGR). The experiments are then implemented on the Global Environment for Network Innovations (GENI) testbed. Along with realistic contact plans (CP) of the nodes, this network implementation was used to run experiments testing the performance of Delay Tolerant Networking (DTN) with and without cross links between Mars orbiters. The experiments showed that in an Earth-Mars communication network using two Mars orbiters, allowing cross links between the orbiters results in increasing the amount of data transferred by roughly 9.2%. Data sent from Mars Rover to the Earth stations also increases by 35.7% when a third satellite (Mars Express) was added to the network without cross links. Finally, when cross links are allowed across all satellites orbiting Mars and serving as relay nodes between the Earth stations and Mars rover, the communication was enhanced by almost 46%. We conclude that by adding cross links, the performance of the network is enhanced for a better transmission of data from Mars to the Earth, which is very pertinent for the scalability of the network.
Popular Mechanics has published a pretty good introduction to DTN for the non-technical layperson…
It’s a pretty entertaining read. Check it out at: http://www.popularmechanics.com/technology/infrastructure/a19469/there-will-be-netflix-on-mars/
Chapter members might be interested in attending (or viewing via webcast) an Internet of Things Conference organized by our sister chapter, SF Bay ISOC. It’s to be held next Thursday at the Computer History Museum in Mountain View, CA. The event website has all the details: speakers, agenda, links to the registrations site for physical attendance and a link to the ISOC LiveStream channel for viewing the webcast. Speaker videos will be posted to YouTube and LiveStream soon after the event. More more information, please go to: http://www.sfbayisoc.org/iot-conference/
IPN-ISOC Board Member Vint Cerf is the keynote speaker for the event. IPN-ISOC Vice Chair Scott Burleigh will be giving a presentation on DTN as a cost-effective way to extend the reach of the Internet of Things and improve security.
Chapter members might find this IEEE Explore article interesting. It explains how planetary space exploration increasingly will rely upon robots (like the Mars rovers) for exploration. In particular, NASA and other space agencies are looking to place humans in orbit around Mars and use them to control more detailed exploration by remotely controlling robots on the surface. DTN will play a critical role in providing reliable data communication within the constrained network environments of outer space and the planetary surface itself.
METERON is a joint project, led by the European Space Agency (ESA), with support by NASA, that is evaluating and demonstrating DTN and other technologies for use in future human exploration of space.
The full article is available at: http://ieeexplore.ieee.org/xpls/icp.jsp?arnumber=7081167
DTN making progress as both a terrestrial Internet standard and as a standardfor space communications
The global standards-setting organization for the Internet—the IETF—has launched DTN Working Group to formally develop and adopt DTN as standard for Internet data communications. The DTN WG is working on a major revision to the core Bundle Protocol specification (currently RFC 5050). An html version of their progress on the draft is available at:
You can sign up for regular updates about the activities of the IETF DTN Working group at:
CCSDS is a global standards-setting organization for space data systems used in civilian space flight. The have completed their final review and have published a recommended standard for the Bundle Protocol for use in global space data communication:
Other CCSDS recommended standards can be browsed at:
Visit the CCSDS web site for more information:
Forrest Warthman, of Warthman Associates, with assistance from Scott Burleigh of NASA/JPL, has recently completed revisions and updates to the “DTN Tutorial” document to bring it up to date with developments in DTN since the last update was published three years ago. He has also created a version of the document intended for less-technical folk (the “DTN Primer v3.2″).
Many thanks to Forrest for donating his time and skill to this effort!
The Space Terrestrial Internetworking Workshop (STINT) for 2015 is coming up in December. It will coincide with IEEE WiSEE in Orlando, Florida. The workshop runs from December 14th through the 16th. For more information, see the STINT 2015 website.
The theme for STINT 2015 is Optimizing End-To-End Exchange. Papers are being solicited for the following topics:
- Delay and Disruption Tolerant Networking.
- Modeling and Dynamics of Mobile Space-Based Networks.
- Autonomous Configuration and Control of Network Nodes.
- Protocols, Applications, and Concepts for Network Management.
- End-to-end Security Services Across an Internetworking Overlay.
- Store-and-Forward Routing, Congestion Modeling, and Topological Sychronization.
- Mission Concepts Enabled by Internetworks.
Videos (in pretty luscious HD) of the speaker presentations are available on the Internet Society’s LiveStream channel: http://livestream.com/internetsociety/IPN-ISOC-2
And also on YouTube: https://www.youtube.com/playlist?list=PL4buVHalBRoPpFRFlpYVnXHLwWNwFmpmt
Here are the speakers’ presentations from last week’s IPN conference in Washington, DC:
Brett Willman (NASA): “DTN deployments on the International Space Station” Coming soon…
Donald Cornwell (NASA): “NASA’s Advanced Communications Program and the Opportunities for DTN” NASA’s Advanced Comm Program and Opportunities for DTN pt1; NASA’s Advanced Comm Program and Opportunities for DTN pt2; NASA’s Advanced Comm Program and Opportunities for DTN pt3
David Israel (NASA): “A DTN-Enabled Near Earth Architecture” IPNSIG 2015 Dave Israel v2
Scott Burleigh (NASA/JPL): “What’s New in ION?” What’s new in ION
Keith Scott (Area Director, CCSDS: “DTN networking protocols being standardized for space communication as part of the Solar System Internet” IPNSIG Presentation — DTN for CCSDS – v3
Fred Templin (Boeing): “Demonstration of the delay-tolerant public key infrastructure system” IPNSIG DTN Security Key Management
Dr. Scott Pace (Director, the Space Policy Institute, George Washington University): “US Space Policy Choices” IPN ISOC Talk 18 May 2015 Pace no backups or video