A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : 6tus Layer Specification
Author(s) : Qin Wang
Xavier Vilajosana
Thomas Watteyne
Filename : draft-wang-6tsch-6tus-01.txt
Pages : 56
Date : 2013-05-23
Abstract:
The recently published [IEEE802154e] standard formalizes the concept
of link-layer resources in LLNs. Nodes are synchronized and follow a
schedule. A time slot in that schedule corresponds to an atomic
link-layer resource, and can be allocated to any pair of neighbors in
the network. This allows the schedule to be built to tightly match
each node's bandwidth, latency and energy constraints, while ensuring
collision-free communication. The [IEEE802154e] standard does not,
however, present a mechanism to do so, as building and managing the
schedule is out of the standard's scope. Routing layers such as the
IETF IPv6 Routing Protocol for LLNs (RPL) provide a mechanism to
route multipoint-to-point traffic (from devices inside the LLN
towards a central control point) and point-to-multipoint traffic
(from the central control point to the devices inside the LLN).
Network layer overlays cannot be optimized and adapted to take
advantage of the cell-based topology created by the underlying TSCH
MAC layer as a missing set of functionalities need to be defined.
This document describes the 6tus layer and the main commands it
provides to upper network layers such as RPL or GMPLS. The set of
functionalities includes feedback metrics from cell states so network
layers can take routing decisions, TSCH configuration and control
procedures, and the support for centralized and decentralized
scheduling policies.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-wang-6tsch-6tus
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-wang-6tsch-6tus-01
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-wang-6tsch-6tus-01
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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