An Optimization for the MANET Neighborhood Discovery Protocol (NHDP)
draft-ietf-manet-nhdp-optimization-02

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Last updated 2014-08-07
Replaces draft-dearlove-manet-nhdp-optimization
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Mobile Ad hoc Networking (MANET)                             C. Dearlove
Internet-Draft                                           BAE Systems ATC
Updates: 6130, 7181 (if approved)                             T. Clausen
Intended status: Standards Track                LIX, Ecole Polytechnique
Expires: February 8, 2015                                 August 7, 2014

  An Optimization for the MANET Neighborhood Discovery Protocol (NHDP)
                 draft-ietf-manet-nhdp-optimization-02

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 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".

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on February 8, 2015.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 5
   3.  Applicability Statement . . . . . . . . . . . . . . . . . . . . 5
   4.  Changes to NHDP . . . . . . . . . . . . . . . . . . . . . . . . 5
     4.1.  Interface Information Bases . . . . . . . . . . . . . . . . 6
     4.2.  HELLO Message Processing  . . . . . . . . . . . . . . . . . 6
     4.3.  Information Base Changes  . . . . . . . . . . . . . . . . . 6
     4.4.  Constraints . . . . . . . . . . . . . . . . . . . . . . . . 7
   5.  Changes to OLSRv2 . . . . . . . . . . . . . . . . . . . . . . . 7
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 9
   7.  Security Considerations . . . . . . . . . . . . . . . . . . . . 9
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 9
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 9
     9.1.  Normative References  . . . . . . . . . . . . . . . . . . . 9
     9.2.  Informative References  . . . . . . . . . . . . . . . . . . 9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . . . 9

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