Delay-Tolerant Networking work:
Saratoga Bundle Protocol work Interplanetary Internet work HTTP-DTN

Work done with colleagues at Surrey Satellite Technology Ltd and NASA Glenn Research Center.

The DMC satellites are also notable for communicating with their ground stations using the Internet Protocol for both payload data transfer and command and control, so extending the Internet into space. This included an on-board Internet router and the first use of the 'bundle' protocol in space where Sensor data was successfully delivered from the satellite using this disruption-and delay-tolerant networking protocol designed for the Interplanetary Internet.
Martin Sweeting, Modern Small Satellites - Changing the Economics of Space, Proceedings of the IEEE.

a T-shirt from Vint Cerf
Vint Cerf, T-shirt (de?)signer.

We have done considerable work in the area of delay- and disruption-tolerant networking (DTN), building on our initial co-operation around testing CLEO, the Cisco router in Low Earth Orbit. We are the first to test the "Bundle Protocol," intended for the Interplanetary Internet, in outer space.

Our work, also described in video presentations, includes:

Practical work
Interplanetary Internet work
We have performed practical work in testing the Internet in space, and in being the first to test IPv6 and the Bundle Protocol in space.

Saratoga
a fast data transfer protocol, originally developed at Surrey Satellite Technology Ltd (SSTL) and taken to the Internet Engineering Task Force (IETF) for public scrutiny.

Theoretical work
Bundle Protocol work
We carried out theoretical analysis and assessed the Bundle Protocol, preferred by the Internet Research Task Force Delay-Tolerant Networking Research Group (DTNRG), found drawbacks, and have proposed workarounds.

HTTP-DTN
We have proposed HTTP-DTN as an alternative, simple, approach to delay-tolerant networking, leveraging existing popular HTTP and MIME protocols and the applications that use them.

Our work has received media coverage:


Lloyd Wood (lloydwood@users.sourceforge.net)