Inter-network Coexistence in the Internet of Things
draft-feeney-t2trg-inter-network-01

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Network Working Group                                          L. Feeney
Internet-Draft                                        Uppsala University
Intended status: Informational                                  V. Fodor
Expires: May 3, 2018                                                 KTH
                                                        October 30, 2017

          Inter-network Coexistence in the Internet of Things
                  draft-feeney-t2trg-inter-network-01

Abstract

   The breadth of IoT applications implies that there will be many
   diverse, administratively independent networks operating in the same
   physical location.  In many cases, these networks will use unlicensed
   spectrum, due to its low cost and ease of deployment.  However, this
   spectrum is becoming increasingly crowded.  IoT networks will
   therefore be subject to wireless interference, both from similar
   networks and from networks that use the wireless channel in very
   different ways.

   High-density, heterogeneous wireless environments present formidable
   challenges for network coexistence.  The PHY and MAC layers are
   primarily responsible for defining how radios use the channel.  But
   higher layer protocols are also a party to adverse interactions
   between networks.  To date, there have been few performance studies
   that fully reflect this aspect of the future IoT operating
   environment, particularly with respect to protocol behavior and
   network-scale interactions.

   This document describes key challenges for coexistence and highlights
   some recent research results showing the impact of protocol level
   interactions on network performance.  It identifies two opportunities
   for the IRTF T2TRG community.  The first is to define best practices
   for performance evaluation and protocol design in the context of
   network coexistence.  The second is to investigate the use of higher
   layer protocols to actively participate in managing network
   coexistence.

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 https://datatracker.ietf.org/drafts/current/.

Feeney & Fodor             Expires May 3, 2018                  [Page 1]
Internet-Draft          inter-network coexistence           October 2017

   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on May 3, 2018.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  IoT interaction challenges  . . . . . . . . . . . . . . . . .   4
     2.1.  Scale . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  Independence  . . . . . . . . . . . . . . . . . . . . . .   5
     2.3.  Resource limitations  . . . . . . . . . . . . . . . . . .   5
     2.4.  Diversity . . . . . . . . . . . . . . . . . . . . . . . .   5
       2.4.1.  Radio and PHY . . . . . . . . . . . . . . . . . . . .   6
       2.4.2.  Network structures  . . . . . . . . . . . . . . . . .   6
       2.4.3.  Protocols . . . . . . . . . . . . . . . . . . . . . .   7
   3.  Interaction behaviors . . . . . . . . . . . . . . . . . . . .   8
     3.1.  WiFi  . . . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.2.  IEEE 802.15.4 . . . . . . . . . . . . . . . . . . . . . .   9
     3.3.  MAC layer interactions  . . . . . . . . . . . . . . . . .  10
   4.  Network coexistence in the IRTF/IETF context  . . . . . . . .  10
     4.1.  Protocol evaluation . . . . . . . . . . . . . . . . . . .  10
     4.2.  Mitigation strategies . . . . . . . . . . . . . . . . . .  11
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   6.  Conclusion  . . . . . . . . . . . . . . . . . . . . . . . . .  13
   7.  Informative References  . . . . . . . . . . . . . . . . . . .  14
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  16
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