Autonomous and dynamic TSCH cell allocation for time-varying traffic load and evolving topology
draft-kim-6tisch-trfalice-00

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6TiSCH Working Group                                       Seohyang Kim
Internet-Draft                                Seoul National University
Intended status: Standards Track                          Hyung-Sin Kim
Expires: May 27, 2019                 University of California Berkeley
                                                          Chongkown Kim
                                              Seoul National University
                                                      November 29, 2018

            Autonomous and dynamic TSCH cell allocation 
        for time-varying traffic load and evolving topology
                  draft-kim-6tisch-trfalice-00
                  

Abstract

   This document provides the method that autonomously and dynamically 
   schedules TSCH slotframe based on the current traffic load. In the 
   introduction part, we introduce some basic knowledge on TSCH and 
   RPL. After this, we introduce some existing TSCH schedulers and 
   their limitations. They are classified as centralized, distributed,
   and autonomous. Then, we propose a novel autonomous and dynamic 
   TSCH cell scheduler. With this, each node schedules its own TSCH 
   slotframe and allocates additional cells based on the current 
   traffic load without any negotiation or traffic overhead. Since 
   they allocate additional cells only when needed, energy efficient 
   operation can be achieved simultaneously.
 
 

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   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Kim, et al.           Expires May 27, 2019                   [page 1]


Internet-Draft                TRFALICE                   November 2018

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Table of Contents

 1.  Introduction . . . . . . . . . . . . . . . . . . . .. . . . . .  2
 2.  Requirements Language . . . . . . . . . . . . . . . . . . . . .  4
 3.  Terminology. . . . . . . . . . . . . . . . . . . . . . . .  . .  4
 4.  TSCH Schedulers . . . . . . . . . .. . . . .  . . . . . . . . .  4
      4.1.  Overview . . . . . . . . . . . . . . . . . . . . . . . .  4
      4.2.  Centralized Schedulers . . . . . . . . . . . . . . . . .  4
      4.3.  Distributed Schedulers  .  . . . . . . . . . . . . . . .  5
      4.4.  Autonomous Schedulers . .  . . . . . . . . . . . . . . .  5
 5.  Autonomous and Dynamic TSCH Cell Allocation  Method . . . . . .  6 
      5.1.  Schedule of Unicast Slotframe. . . . . . . . . . . . . .  3
      5.2.  Schedule of Supplementary Slotframe. . . . . . . . . . .  3
      5.3.  Summary. . . . . . . . . . . . . . . . . . . . . . . . .  3
 6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 12 
 7.  Security Considerations . . . . . . . . . . . . . . . . . . . . 12
 8.  Acknowlegement. . . . . . . . . . . . . . . . . . . . . . . . . 12
 9.  References. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     9.1.  Normative References. . . . . . . . . . . . . . . . . . . 13 
     9.2.  Informative References. . . . . . . . . . . . . . . . . . 13
 Authors' Addresses . . . . . . . . . . . . . . . . . . . . .. . . . 14

1. Introduction

   TSCH is one mode on IEEE 802.15.4e standard and it is an acronym 
   of Time Slotted Channel Hopping, which has the feature of Time
   Division Multiple Access with channel hopping. From 2003, IEEE 
   802.15.4 standard has been introduced and the standard was extended
   with 2006 version. Zigbee is one of the mostly used protocol which 
   is on the basis of 802.15.4 standard. However, the standard was not 
   enough to support industrial network which requires higher 
   reliability. To better support industrial markets by increasing 
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