[core] I-D Action: draft-ietf-core-observe-multicast-notifications-14.txt

internet-drafts@ietf.org Wed, 22 April 2026 16:37 UTC

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Date: Wed, 22 Apr 2026 09:37:02 -0700
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Subject: [core] I-D Action: draft-ietf-core-observe-multicast-notifications-14.txt
Archived-At: <https://mailarchive.ietf.org/arch/msg/core/C4t31LceTBto5qL2h6IzahyV51E>

Internet-Draft draft-ietf-core-observe-multicast-notifications-14.txt is now
available. It is a work item of the Constrained RESTful Environments (CORE) WG
of the IETF.

   Title:   Observe Notifications as CoAP Multicast Responses
   Authors: Marco Tiloca
            Rikard Höglund
            Christian Amsüss
            Francesca Palombini
   Name:    draft-ietf-core-observe-multicast-notifications-14.txt
   Pages:   76
   Dates:   2026-04-22

Abstract:

   The Constrained Application Protocol (CoAP) allows clients to
   "observe" resources at a server and to receive notifications as
   unicast responses upon changes of the resource state.  In some use
   cases, such as those based on publish-subscribe, it would be
   convenient for the server to send a single notification addressed to
   all the clients observing the same target resource.  This document
   updates RFC7252 and RFC7641, and it defines how a server sends
   observe notifications as response messages over multicast,
   synchronizing all the observers of the same resource on the same
   shared Token value.  Besides, this document defines how the security
   protocol Group Object Security for Constrained RESTful Environments
   (Group OSCORE) can be used to protect multicast notifications end-to-
   end between the server and the observer clients.

The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-core-observe-multicast-notifications/

There is also an HTML version available at:
https://www.ietf.org/archive/id/draft-ietf-core-observe-multicast-notifications-14.html

A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-core-observe-multicast-notifications-14

Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts

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