Board member Keith Scott provides this update on DTN activities within CCSDS.
CCSDS is in the process of review and approval of two key DTN protocols of particular interest to the InterPlanetary Networking community: the Licklider Transport Protocol and the Bundle Protocol. CCSDS approval will establish LTP and BP as Space Data Systems standards for all member space agencies.
LTP review is pretty much all but done. BP is in its third member agency review, and is scheduled to complete that review in October, 2014.
In other news, deployment of DTN for operational communications between earth and the International Space Station is expected to occur this Fall. The NASA Change Request for deploying DTN for ISS operations was approved in 2013. DTN is already used for most communications between ISS experimental payloads and earth-based researchers and operators.
The fifth annual IEEE Space Mission Challenges for IT (SMC IT) Conference is coming up September 24th – 26th, 2014, at Laurel, Maryland. There will be a Space Terrestrial Internetworking (STINT) workshop co-located with the SMC IT conference. The theme for the workshop will be “Operationalizing the Network Environment”. Presentations will cover the following topics:
- Delay and Disruption Tolerant Networking
- Modeling the 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.
- Commercial, Scientific, and/or Government Missions Enabled by Space-Terrestrial Internetworks
For more information, please visit the STINT workshop web page: http://www.stintworkshop.org/
Many thanks to Juan Fraire for the excellent workshop poster.
Complete documents from the DTNWG BoF at IETF 90 are available at: https://datatracker.ietf.org/meeting/90/materials.html Search the page for DTNWG.
Here are links to the individual documents:
There is an approved DTN Birds of a Feather (BoF) group meeting at IETF 90. It’s currently scheduled for 1520 – 1650 on Wednesday, July 23rd. For more information about the BoF group, including charter, problem and solution statements, go to: http://trac.tools.ietf.org/bof/trac/wiki/WikiStart
For the most current IETF agenda, including the room for the BoF, go to: http://trac.tools.ietf.org/agenda/90/
For the BoF meeting agenda, go to: http://trac.tools.ietf.org/agenda/90/agenda-90-dtnwg.html
This is an important first step on the road to standard adoption for DTN. If you are attending IETF, we strongly encourage you to attend the DTN BoF.
Fred Templin (Boeing) has been leading the charge to initiate a Birds of a Feather (BOF) group at this July’s IETF meeting in Toronto, Canada. A mailing list has been created to discuss the organization of the group. You can get more information and sign up for the list at:
An introductory message including the draft working group charter and proposed BoF agenda will be published soon.
Upcoming Special Issue of Ad Hoc Networks to feature New Research Challenges in Mobile, Opportunistic & Delay-Tolerant Networks
47 papers on have been submitted for review for this upcoming issue of the scholarly journal, Elsevier Ad Hoc Networks. The issue should be coming out in Fall, 2014.
Topics for the special issue include, but are not limited to:
- Opportunistic Networks / Delay- and Disruption-Tolerant Networks
- Software-Defined Networks & OpenFlow deployments supporting mobile communication
- Mobile Cloud Computing
- Information-Centric Networks for hybrid network deployments
- Space Communications extending the Internet
- Free Internet / Lowest-Cost Denominator Networking
- Extreme conditions / Disaster area communications
- Social networking based communications
- Test-beds / real deployments of infrastructure-supported mobile communications
- Security, privacy and trust in challenging network environments
- Resource pooling between fixed infrastructures and mobile environments.
- New applications / services in integrated network environments
- Network management issues / solutions over hybrid network deployments.
For more information, go to: http://www.journals.elsevier.com/ad-hoc-networks/call-for-papers/special-issue-on-new-research-challenges-in-mobile/
Here’s an interesting article on the Synchronized Position Hold, Engage, Reorient, Experimental Satellites (SPHERES—and isn’t THAT a reach for a catchy acronym?) on board the International Space Station (ISS) from NASA Ames Research Center: http://www.nasa.gov/mission_pages/station/research/news/smart_spheres/#.UyxiVPldWa9
The photos below show SPHERES—small, self-propelled robotic sphere (rather: sphere-like) units about the size of a volleyball that are being tested on board ISS for various maintenance and emergency repair tasks. SPHERES have used Android smart phones for communication and control since 2011. Now a new version is being flight tested before being launched later this year to provide enhanced capabilities (such as a 3-D positional sensor). The phone being tested is the Google Project Tango Android smart phone.
SPHERES Circa Expedition 38…
- SPHERES circa Expedition 22
NASA recently announced a significant review milestone for the Laser Communications Relay Demonstration (LCRD) scheduled for 2017.
The LCRD project is NASA’s first long duration optical communications mission. This demonstration builds upon NASA’s highly successful Lunar Laser Communications Demonstration (LLCD) mission (which validated the use of DTN for laser communications to the moon and back). LCRD will conduct a two-year demonstration of optical relay services to determine how well the system operates and collect long-term performance data. Full details are available here:
An article published in the scientific journal Natural Hazards and Earth System Sciences recognizes work of the N4C Community using (DTN) technology for automatic data transfer in a huge karst cave system in Slovenia. The cave allows tourists, who ride a train deep into the cave, potentially exposing them to air quality health risks. DTN technology allowed the establishment of an early warning system (EWS) for poor air quality. The experiment placed a DTN “data mule” (a DTN-enabled computer with WiFi connection) on the train. The data mule on the train received data from a meteorological station deep within the cave. It transported the data to the train station at the cave entrance, which then updated the surveillance system, providing alert capabilities of deteriorating air quality conditions deep within the cave. The full text of the paper is available here:
Tourists descending into the depths…
- Meteorological station deep within the cave system
The “data mule” DTN wifi-enabled unit on the tourist train
On February 4th, 2014, Space.com reported that astronauts aboard the ISS will start launching 33 cubesats from the ISS on Thursday (Feb 6th, 2014) now that a launcher has been installed. Michael Johnson, NanoRacks chief technology officer, said this may be a “world-record deployment.” Most of these satellites belong to Planet Labs as part of its Flock 1 constellation of Earth-observing spacecraft. According to the article, Johnson stressed that the launches pose no “collision risk” to the station because of how the satellites will be deployed. See the full article at: http://www.space.com/24546-cubesat-record-space-station-launch.html
On Feb 5, 2014 Meghan Neal at Motherboard writes on the Outernet project, which aims to beam “‘high-quality’ news and educational content” free of charge to everyone on Earth through a constellation of nanosatellites. Neal notes there is a large amount of skepticism over how the project would be funded, how the content would be selected, and whether other agencies would allow this “rogue alt-internet” to go forward. Neal comments that despite these doubts, the “pie-in-the-sky technoutopian vision” has a “very optimistic timeframe” that includes testing aboard the ISS this September. Neal adds that the team has already requested time at the ISS but did not mention the status of the request. See the full article at: http://motherboard.vice.com/blog/outernet-wants-to-free-the-internet-by-sending-it-to-space
Thanks to Scott Burleigh from JPL for bringing this to our attention.
CubeSat deployment as seen from the ISS