Lectures notes for 2010 - KTH

Delay Tolerant Networks (DTNs)
Traditional applications generally assumed that to some degree there was:
(1) end-to-end connectivity, (2) low round trip time, and
(3) access to naming/caching/searching/… infrastructures.
Delay Tolerant Networks do not require these assumptions, thus nodes can
communicate using an opportunistic exchange of messages (think of the messages
as a propagating virus - moving from host to host) ⇒ epidemic routing
protocols[15].
Key issues include [16]:
• What application layer data units are bundled into the DTN-layer
protocol bundles for transport?
• Actual mobility patterns (social networks, commuting patterns, … )
Metrics include [16]: Delivery ratio, Delivery Delay, and Delivery Cost
Maguire Delay Tolerant Networks (DTNs) 13: 8 of 91
maguire@kth.se 2010.03.21 Internetworking/Internetteknik