I-D ACTION:draft-ietf-udlr-assym-broadcast-links-00.txt

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	Title		: Internet Architecture Considerations for Assymetric 
                          and Unidirectional Broadcast Links
	Author(s)	: J. Crowcroft
	Filename	: draft-ietf-udlr-assym-broadcast-links-00.txt
	Pages		: 8
	Date		: 30-Nov-98
	
   Satellite hops, the region between a basestation and a set of mobile
   nodes, and a number of other similar scenarios represent a challenge
   to providing IP connectivity at various levels due to the 1-many
   broadcast nature of the link. The UDLR group has addressed these
   problems in some limited situations. The general case, where
   multiple, possibly partially intersecting set of such hops are part
   of a general set of Internet Paths (or need to be considered in the
   route computation that will buld such paths) is complex. This note is
   an attempt to outline a framework for the general case. We include
   certain recent approaches to managing connectivity that also include
   quality of service, multiple alternate paths, and traffic engineering
   considerations.
 
   In this version of this note, we are discussing techniques for
   connectivity, so mechanisms and techniques described are applicable
   to routers. We would need a seperate (and hopefully much simpler) set
   of mechanisms to incorporate hosts that exist on a unidirectional
   link or path that includes such links.


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