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6TiSCH Operation Sublayer (6top) Protocol (6P)

Approval announcement
Draft of message to be sent after approval:


From: The IESG <>
To: IETF-Announce <>
Cc: The IESG <>,, Pascal Thubert <>,,,,,
Subject: Protocol Action: '6TiSCH Operation Sublayer Protocol (6P)' to Proposed Standard (draft-ietf-6tisch-6top-protocol-12.txt)

The IESG has approved the following document:
- '6TiSCH Operation Sublayer Protocol (6P)'
  (draft-ietf-6tisch-6top-protocol-12.txt) as Proposed Standard

This document is the product of the IPv6 over the TSCH mode of IEEE 802.15.4e
Working Group.

The IESG contact persons are Suresh Krishnan and Terry Manderson.

A URL of this Internet Draft is:

Ballot Text

Technical Summary

   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 6P layer is formed by
   the 6top Protocol defined in this document and 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

Working Group Summary

This document was not controversial. The design was complex due to the need to save exchanges and yet provide transactional outcomes.
The next generation of the work may be done at IEEE, e.g. within IEEE Std. 802.12

Document Quality

This specification was implemented in openWSN and contiki.
It was interop tested at the 6TiSCH F-interop in Prague:
Return from experimentation is implemented in the draft


Pascal Thubert is the Document Shepherd. Suresh Krishnan is the Responsible Area Director.

RFC Editor Note