Name: draft-clausen-manet-linkbuffer-00
Title: Link Buffering for MANETs
State: Active
Authors: Thomas Clausen, Kenichi Mase
Group: Individual Submissions (none)
Date: 2004-10-19
A number of MANET routing protocols employ the ability to temporarily
buffer undeliverable IP datagrams until a route to a destination becomes
available. This is indeed the case for reactive protocols, which largely
are based on the ability to store an undeliverable IP datagram while a
route discovery operation is carried out. Current specifications of
proactive routing-protocols do, however, also indiate that they may benefit
from such a mechanism: while a local link breakage may imply that a
selected route to a given destination breaks, buffering an undeliverable IP
datagram may allow a local topology discovery mechanism to select an
alternative route. This document describes a generic mechanism for
buffering IP datagrams in MANETs. The mechanism is based on the idea that
while a local link may make a route to a destination fail, it does not
imply that an alternative route to that destination is not available.
Hence, IP datagrams for transmission along that route are buffered to allow
the routing protocol time to construct an alternative route. The IP
datagram is discarded only if the routing protocol hasnâ"À"Ùt been able to
provide an alternative route within a determined small delay. We note, that
this specification does not mandate a required behavior for MANET routing
protocols. Rather, since the mechanisms currently employed in the four
existing MANET routing protocol specification are similar in what they try
to accomplish, it is the goal of this specification to generalize and
expand on these mechanisms, thereby provide a framework for (i) discussing
and refining the mechanism in isolation and (ii) providing a common
element, which may be usefull for multiple MANET routing protocols.
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