@TechReport{	  it:2003-020,
  author	= {Christian Tschudin and Richard Gold},
  title		= {SelNet: A Translating Underlay Network},
  institution	= {Department of Information Technology, Uppsala University},
  department	= {Division of Computer Systems},
  year		= {2003},
  number	= {2003-020},
  month		= apr,
  note		= {Originally written October 2001},
  abstract	= {The Internet has successfully promoted address uniformity
		  and a node centric forwarding semantics. However, NAT and
		  wireless networks among others have shown the advantage and
		  the need of revising basic assumptions of the Internet
		  model. In this paper we review several of these basic
		  networking concepts and introduce a new set of network
		  abstractions like ``membranes'' which are individual
		  physical or virtual networks and ``wormholes'' which link
		  one or more membranes together. This leads us to an active
		  network architecture called SelNet that is based on
		  tunnelling and translation mechanisms. Besides the
		  architecture we present several network services and
		  abstractions that can be built on top of it. A brief status
		  report on a prototype implementation is also provided.}
}