[core] I-D Action: draft-ietf-core-observe-multicast-notifications-01.txt

internet-drafts@ietf.org Mon, 12 July 2021 15:35 UTC

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Subject: [core] I-D Action: draft-ietf-core-observe-multicast-notifications-01.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Constrained RESTful Environments WG of the IETF.

        Title           : Observe Notifications as CoAP Multicast Responses
        Authors         : Marco Tiloca
                          Rikard Höglund
                          Christian Amsüss
                          Francesca Palombini
	Filename        : draft-ietf-core-observe-multicast-notifications-01.txt
	Pages           : 77
	Date            : 2021-07-12

   The Constrained Application Protocol (CoAP) allows clients to
   "observe" resources at a server, and 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 a 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
   a same resource on a same shared Token value.  Besides, this document
   defines how Group OSCORE can be used to protect multicast
   notifications end-to-end between the server and the observer clients.

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