6top Protocol (6P)
draft-ietf-6tisch-6top-protocol-11

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Document Type Active Internet-Draft (6tisch WG)
Last updated 2018-04-05 (latest revision 2018-03-31)
Replaces draft-wang-6tisch-6top-protocol
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6TiSCH                                                      Q. Wang, Ed.
Internet-Draft                           Univ. of Sci. and Tech. Beijing
Intended status: Standards Track                           X. Vilajosana
Expires: October 1, 2018                 Universitat Oberta de Catalunya
                                                             T. Watteyne
                                                          Analog Devices
                                                          March 30, 2018

                           6top Protocol (6P)
                   draft-ietf-6tisch-6top-protocol-11

Abstract

   This document defines the 6top Protocol (6P), which enables
   distributed scheduling in 6TiSCH networks.  6P allows neighbor nodes
   to add/delete TSCH cells to one another.  6P is part of the 6TiSCH
   Operation Sublayer (6top), the next higher layer to the IEEE Std
   802.15.4 TSCH medium access control layer.  The 6top layer terminates
   the 6top Protocol defined in this document, and runs one of more 6top
   Scheduling Function(s).  A 6top Scheduling Function (SF) decides when
   to add/delete cells, and triggers 6P Transactions.  This document
   lists the requirements for an SF, but leaves the definition of SFs
   out of scope.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in RFC
   2119 [RFC2119].

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
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on October 1, 2018.

Wang, et al.             Expires October 1, 2018                [Page 1]
Internet-Draft            6tisch-6top-protocol                March 2018

Copyright Notice

   Copyright (c) 2018 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
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   include Simplified BSD License text as described in Section 4.e of
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  6TiSCH Operation Sublayer (6top)  . . . . . . . . . . . . . .   4
     2.1.  Hard/Soft Cells . . . . . . . . . . . . . . . . . . . . .   5
     2.2.  Using 6P with the Minimal 6TiSCH Configuration  . . . . .   5
   3.  6top Protocol (6P)  . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  6P Transactions . . . . . . . . . . . . . . . . . . . . .   6
       3.1.1.  2-step 6P Transaction . . . . . . . . . . . . . . . .   7
       3.1.2.  3-step 6P Transaction . . . . . . . . . . . . . . . .   9
     3.2.  Message Format  . . . . . . . . . . . . . . . . . . . . .  11
       3.2.1.  6top Information Element (IE) . . . . . . . . . . . .  11
       3.2.2.  Generic 6P Message Format . . . . . . . . . . . . . .  11
       3.2.3.  6P CellOptions  . . . . . . . . . . . . . . . . . . .  12
       3.2.4.  6P CellList . . . . . . . . . . . . . . . . . . . . .  14
     3.3.  6P Commands and Operations  . . . . . . . . . . . . . . .  15
       3.3.1.  Adding Cells  . . . . . . . . . . . . . . . . . . . .  15
       3.3.2.  Deleting Cells  . . . . . . . . . . . . . . . . . . .  17
       3.3.3.  Relocating Cells  . . . . . . . . . . . . . . . . . .  18
       3.3.4.  Counting Cells  . . . . . . . . . . . . . . . . . . .  24
       3.3.5.  Listing Cells . . . . . . . . . . . . . . . . . . . .  25
       3.3.6.  Clearing the Schedule . . . . . . . . . . . . . . . .  27
       3.3.7.  Generic Signaling Between SFs . . . . . . . . . . . .  28
     3.4.  Protocol Functional Details . . . . . . . . . . . . . . .  28
       3.4.1.  Version Checking  . . . . . . . . . . . . . . . . . .  28
       3.4.2.  SFID Checking . . . . . . . . . . . . . . . . . . . .  29
       3.4.3.  Concurrent 6P Transactions  . . . . . . . . . . . . .  29
       3.4.4.  6P Timeout  . . . . . . . . . . . . . . . . . . . . .  30
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