[core] Fwd: New Version Notification for draft-tiloca-core-observe-multicast-notifications-02.txt
Marco Tiloca <marco.tiloca@ri.se> Tue, 10 March 2020 17:59 UTC
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From: Marco Tiloca <marco.tiloca@ri.se>
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Subject: [core] Fwd: New Version Notification for draft-tiloca-core-observe-multicast-notifications-02.txt
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Hello CoRE, We have submitted an update for the draft "Observe Notifications as CoAP Multicast Responses". https://tools.ietf.org/html/draft-tiloca-core-observe-multicast-notifications-02 The document describes how a CoAP server can send Observe notifications over multicast, and how Group OSCORE can be used to protect such notifications. The proposed approach is especially relevant for, but not limited to, the "Pub-Sub and Multicast" use case elaborated during the Hallway Discussion at IETF 104. This update especially includes: 1) encoding of the informative response and phantom request; 2) considerations on congestion control; 3) cancellation of group observation, supported by a rough counting of alive clients; 4) an appendix about alternative ways to retrieve a phantom request. Comments are welcome! Best, /Marco -------- Forwarded Message -------- Subject: New Version Notification for draft-tiloca-core-observe-multicast-notifications-02.txt Date: Mon, 09 Mar 2020 12:17:34 -0700 From: internet-drafts@ietf.org To: Christian Amsuess <christian@amsuess.com>, Marco Tiloca <marco.tiloca@ri.se>, Rikard Hoeglund <rikard.hoglund@ri.se>, Francesca Palombini <francesca.palombini@ericsson.com> A new version of I-D, draft-tiloca-core-observe-multicast-notifications-02.txt has been successfully submitted by Marco Tiloca and posted to the IETF repository. Name: draft-tiloca-core-observe-multicast-notifications Revision: 02 Title: Observe Notifications as CoAP Multicast Responses Document date: 2020-03-09 Group: Individual Submission Pages: 34 URL: https://www.ietf.org/internet-drafts/draft-tiloca-core-observe-multicast-notifications-02.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-02 Htmlized: https://datatracker.ietf.org/doc/html/draft-tiloca-core-observe-multicast-notifications Diff: https://www.ietf.org/rfcdiff?url2=draft-tiloca-core-observe-multicast-notifications-02 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 observer clients. 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
- [core] Fwd: New Version Notification for draft-ti… Marco Tiloca