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Letter to Members re ISS DTN Go Live

Dear Chapter Members–

An item of interest for you:

NASA has just announced that Delay & Disruption Tolerant Networking (DTN) has just gone live for all communications to the International Space Station (ISS). This is a really significant step forward for DTN and InterPlanetary Networking. While DTN has been used since 2010 for communications between scientists on the ground and their scientific payloads onboard ISS, NASA had to be much more careful in deploying ISS for operational communications, which are critical to crew safety and flight operations. It took over a year to review and approve the Change Request. NASA’s decision to go live with DTN is a huge vote of confidence for its reliability and fitness-to-task for space communications.

Here is a link to the official NASA announcement:

Many, many people and organizations have worked for many years to make this a reality. Key organizations include the the DTN Research Group of the Internet Research Task Force, who developed and tested the protocol suite; Jet Propulsion Laboratory, who developed the Interplanetary Overlay Network (ION) implementation of DTN, and the Consultative Committee for Space Data Systems (CCSDS), who reviewed and approved the Bundle Protocol and Licklider Transport Protocols for use in civilian space flight.

We are fortunate to have members of our Chapter and our Board who have been key players in this effort. These include:

Board member Vint Cerf, widely recognized as one of the “Fathers of the Internet” for his work on the design of the TCP/IP protocols and the architecture of the Internet, also helped secure the DARPA funding to launch the initial InterPlanetary Internet studies within NASA/JPL.

Vice Chair Scott Burleigh, who has led the development of the ION implementation of DTN (which is the version in use on ISS). He coauthored the DTN Architecture definition (Internet RFC 4838) and also the specification for the DTN Bundle Protocol (BP, Internet RFC 5050).  In addition, he is a co-author of the specifications for the Licklider Transmission Protocol (LTP, Internet RFCs 5325 through 5327).

Board member Keith Scott began working on the Interplanetary Internet in 1998, implemented a precursor to the current Bundle Protocol, and is co-author of the Bundle Protocol (RFC 5050).  Keith currently serves as Area Director for Space Internetworking Systems for the Consultative Committee for Space Data Systems (CCSDS) and leads the CCSDS DTN working group that is standardizing DTN protocols for use in civilian space missions.

Board member Jay Wyatt who, through his role in managing the JPL Space Networking and Mission Automation Program Office has led various DTN development activities including the first deep space flight validation of DTN on NASA’s EPOXi mission.  Currently Jay is the programmatic point of contact for DTN development at JPL and is involved in pursuing various opportunities to infuse DTN into upcoming deep space missions and to complete development of the DTN software suite.

And, finally, we want to acknowledge our departed colleague, IPNSIG Board Member and tireless advocate of DTN, Adrian Hooke, who led the interplanetary networking initiatives within NASA/JPL for many years. Please see for more information about Adrian’s contributions to the field.

Mike Snell

President, the InterPlanetary Network Chapter

DTN Goes Live on ISS!

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.


Interplanetary Internet Implemented on GENI

GENIlogoAn interesting article on the ION distribution of DTN: “The Interplanetary Internet Implemented on the GENI Testbed” can be found at: 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:

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 on DTN


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:


Internet of Things Conference Coming Soon

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:

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.

Mike Snell


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:

DTN Making Progress in Networking Standards

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:

Newly Revised DTN Tutorial v3.2 Available

Warthman Associates

Warthman Associates






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!



STINT Workshop Coming 14-Dec-2015






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.

2015 IPN Conference Videos Available

Videos (in pretty luscious HD) of the speaker presentations are available on the Internet Society’s LiveStream channel:

And also on YouTube:


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