Subject: [core] Fwd: New Version Notification for draft-tiloca-core-observe-multicast-notifications-00.txt

From: Marco Tiloca <[email-masked]>
Date: Tue, 9 Jul 2019 10:28:47 +0200

Hello CoRE,

We have recently submitted a new draft "Observe Notifications as CoAP
Multicast Responses"

https://tools.ietf.org/html/draft-tiloca-core-observe-multicast-notifications

The document describes how a CoAP server can send Observe notifications
over multicast, by synchronizing the observers of a target resource to a
same shared Token value. Also, it describes how Group OSCORE can be used
to protect such notifications sent over multicast.

This is especially relevant for, but not limited to, the "Pub-Sub and
Multicast" use case, that was elaborated at the Hallway Discussion we
had at IETF 104.

In particular, "Proposal 4" in Slide 13 of [1] considers multicast
notifications as CoAP Responses, used by the Broker for distributing
topic updates to the Subscribers. Other than improving communication
performance, this would also allow Subscribers to be only clients,
unlike in the alternative discussed proposals.

This new draft enables the proposal above, together with end-to-end
security of multicast notifications from the Broker to the Subscribers.

Comments are very welcome!

Best,
/Marco

[1]
https://github.com/EricssonResearch/coap-pubsub-profile/blob/master/Pubsub-multicast.pdf

-------- Forwarded Message --------
Subject: 	New Version Notification for
draft-tiloca-core-observe-multicast-notifications-00.txt
Date: 	Sat, 6 Jul 2019 02:33:00 -0700
From: 	[email-masked]
To: 	Christian Amsuess <[email-masked]>, Marco Tiloca
<[email-masked]>, Rikard Hoeglund <[email-masked]>, Francesca
Palombini <[email-masked]>

A new version of I-D,
draft-tiloca-core-observe-multicast-notifications-00.txt
has been successfully submitted by Marco Tiloca and posted to the
IETF repository.

Name: draft-tiloca-core-observe-multicast-notifications
Revision: 00
Title: Observe Notifications as CoAP Multicast Responses
Document date: 2019-07-06
Group: Individual Submission
Pages: 18
URL:
https://www.ietf.org/internet-drafts/draft-tiloca-core-observe-multicast-notifications-00.txt
Status:
https://datatracker.ietf.org/doc/draft-tiloca-core-observe-multicast-notifications/
Htmlized:
https://tools.ietf.org/html/draft-tiloca-core-observe-multicast-notifications-00
Htmlized:
https://datatracker.ietf.org/doc/html/draft-tiloca-core-observe-multicast-notifications

Abstract:
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 to all the clients observing a
same target resource. This document defines how a CoAP server sends
observe notifications as response messages over multicast, by
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 from the CoAP
server to the multiple CoAP clients registered as observers.

Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

The IETF Secretariat