I-D ACTION:draft-ietf-manet-rdmar-00.txt

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This draft is a work item of the Mobile Ad-hoc Networks Working Group of the IETF.

	Title		: Relative Distance Micro-discovery Ad Hoc Routing 
                          (RDMAR) Protocol
	Author(s)	: G. Aggelou, R. Tafazolli
	Filename	: draft-ietf-manet-rdmar-00.txt
	Pages		: 15
	Date		: 16-Sep-99
	
This document describes the Relative  Distance Micro-discovery Ad
Hoc Routing (RDMAR) protocol for use in mobile ad hoc networks
(MANETs).  The protocol is highly adaptive, bandwidth-efficient
and scaleable.  A key concept in its design is that protocol
reaction to link failures is typically localised to a very small
region of the network near the change. This desirable behaviour is
achieved through the use of a novel mechanism for route discovery,
called Relative Distance Micro-discovery (RDM).  The concept behind
RDM is that a query flood can be localised by knowing the relative
distance (RD) between two terminals.  To accomplish this, every
time a route search between the two terminals is triggered, an
iterative algorithm calculates an estimate of their RD, given an
average nodal mobility and information about the elapsed time since
they last communicated and their previous RD.  Based on the newly
calculated RD, the query flood is then localised to a limited
region of the network centred at the source node of the route
discovery and with maximum propagation radius that equals to the
estimated relative distance. This ability to localise query flooding
into a limited area of the network serves to increase scalability
and minimise routing overhead and overall network congestion.

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