A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Mobile Ad-hoc Networks Working Group of the IETF.
Title : An Optimization for the MANET Neighborhood Discovery Protocol (NHDP)
Authors : Christopher Dearlove
Thomas Heide Clausen
Filename : draft-ietf-manet-nhdp-optimization-04.txt
Pages : 10
Date : 2015-01-23
Abstract:
The link quality mechanism of the MANET Neighborhood Discovery
Protocol (NHDP) enables "ignoring" some 1-hop neighbors if the
measured link quality from that 1-hop neighbor is below an acceptable
threshold, while still retaining the corresponding link information
as acquired from HELLO message exchange. This allows immediate
reinstatement of the 1-hop neighbor if the link quality later
improves sufficiently.
NHDP also collects information about symmetric 2-hop neighbors.
However it specifies that if a link from a symmetric 1-hop neighbor
ceases being symmetric, including while "ignored" as described above,
then corresponding symmetric 2-hop neighbors are removed. This may
lead to symmetric 2-hop neighborhood information being permanently
removed (until further HELLO messages are received) if the link
quality of a symmetric 1-hop neighbor drops below the acceptable
threshold, even if only for a moment.
This specification updates RFC6130 "Mobile Ad Hoc Network (MANET)
Neighborhood Discovery Protocol (NHDP)", and RFC7181 "The Optimized
Link State Routing Protocol version 2 (OLSRv2)" to permit, as an
option, retaining, but ignoring, symmetric 2-hop information when the
link quality from the corresponding 1-hop neighbor drops below the
acceptable threshold. This allows immediate reinstatement of the
symmetric 2-hop neighbor if the link quality later improves
sufficiently, thus making the symmetric 2-hop neighborhood more
"robust".
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-manet-nhdp-optimization/
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-manet-nhdp-optimization-04
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-ietf-manet-nhdp-optimization-04
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
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ftp://ftp.ietf.org/internet-drafts/
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