Delay Tolerant Networking
Increasingly, network applications must communicate with counterparts across disparate networking environments characterized by significantly different sets of physical and operational constraints; wide variations in transmission latency are particularly troublesome. The proposed Interplanetary Internet, which must encompass both terrestrial and interplanetary links, is an extreme case. An architecture based on a "least common denominator" protocol that can operate successfully and (where required) reliably in multiple disparate environments would simplify the development and deployment of such applications.
The highly successful architecture and supporting protocols of today's Internet are ill suited for this purpose. But Delay Tolerant Networking will crossover this bottle-neck. In this seminar the fundamental principles that would underlie a delay-tolerant networking (DTN) architecture and the main structural elements of that architecture, centered on a new end-to-end overlay network protocol called Bundling is examined.The US Defense Advanced Research Projects Agency (DARPA), as part of its "Next Generation Internet" initiative, has recently been supporting a small group at the Jet Propulsion Laboratory (JPL) in Pasadena, California to study the technical architecture of an "Interplanetary Internet".
The idea was to blend ongoing work in standardized space communications capabilities with state of the art techniques being developed within the terrestrial Internet community, with a goal of facilitating a transition as the Earth's Internet moves off-planet. The "Interplanetary Internet" name was deliberately coined to suggest a far-future integration of space and terrestrial communications infrastructure to support the migration of human intelligence throughout the Solar System. Joining the JPL team in this work was one of the original designers of the Internet and co-inventor of the "Transmission Control Protocol/Internet Protocol" (TCP/IP) protocol suite. Support for the work has recently transitioned from DARPA to NASA.
