[core] I-D Action: draft-ietf-core-observe-multicast-notifications-13.txt

internet-drafts@ietf.org Mon, 20 October 2025 13:38 UTC

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Date: Mon, 20 Oct 2025 06:38:40 -0700
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Subject: [core] I-D Action: draft-ietf-core-observe-multicast-notifications-13.txt
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Internet-Draft draft-ietf-core-observe-multicast-notifications-13.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-13.txt
   Pages:   74
   Dates:   2025-10-20

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 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 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-13.html

A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-core-observe-multicast-notifications-13

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

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