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boundary="NfdtqXYQfgnDUvqSM1SDGd71pMcQxeh0E"; protected-headers="v1" From: Marco Tiloca To: "core@ietf.org WG (core@ietf.org)" Message-ID: <038d11dd-768c-9440-42a8-3a729c6e6c5c@ri.se> Subject: Fwd: New Version Notification for draft-tiloca-core-observe-multicast-notifications-05.txt References: <161401302982.14028.14113860823096266335@ietfa.amsl.com> In-Reply-To: <161401302982.14028.14113860823096266335@ietfa.amsl.com> --NfdtqXYQfgnDUvqSM1SDGd71pMcQxeh0E Content-Type: multipart/alternative; boundary="------------36B07AEA396BB5DDE217A313" Content-Language: en-US This is a multi-part message in MIME format. --------------36B07AEA396BB5DDE217A313 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Hello CoRE, We have recently submitted an update for the draft "Observe=20 Notifications as CoAP Multicast Responses". https://tools.ietf.org/html/draft-tiloca-core-observe-multicast-notificat= ions-05 The document describes how a CoAP server can send Observe notifications=20 over multicast, and how Group OSCORE can be used to protect such=20 notifications. The proposed approach is especially relevant for, but not = limited to, a Publish-Subscribe scenario with the Broker taking=20 advantage of multicast. This update especially covers: 1) The latest notification is now optional to include in the informative = response from the server. 2) Added target attribute "grp_obs" to signal the possible use of=20 multicast notifications. 3) Improved encoding of transport information, as 'tp_info' parameter=20 specified in the informative response. 4) Revised processing in the presence of proxies, with updated examples=20 in Appendix E and Appendix F. 5) New Appendix C, defining how the server may self-manage the OSCORE gro= up. 6) New Appendix D, defining an optimization where the phantom request is = a deterministic request [1]. Comments are very welcome! Best, /Marco [1] https://datatracker.ietf.org/doc/draft-amsuess-core-cachable-oscore/ -------- Forwarded Message -------- Subject: New Version Notification for=20 draft-tiloca-core-observe-multicast-notifications-05.txt Date: Mon, 22 Feb 2021 08:57:09 -0800 From: internet-drafts@ietf.org To: Christian Amsuess , Francesca Palombini=20 , Marco Tiloca ,=20 Rikard Hoeglund A new version of I-D,=20 draft-tiloca-core-observe-multicast-notifications-05.txt has been successfully submitted by Marco Tiloca and posted to the IETF repository. Name: draft-tiloca-core-observe-multicast-notifications Revision: 05 Title: Observe Notifications as CoAP Multicast Responses Document date: 2021-02-22 Group: Individual Submission Pages: 67 URL:=20 https://eur02.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fwww.i= etf.org%2Farchive%2Fid%2Fdraft-tiloca-core-observe-multicast-notification= s-05.txt&data=3D04%7C01%7Cmarco.tiloca%40ri.se%7C1e7128568c43481d565f= 08d8d752e5ff%7C5a9809cf0bcb413a838a09ecc40cc9e8%7C0%7C0%7C637496098328492= 857%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6I= k1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DmqUV%2Br3bSEimgVSg2FtRsp7neKxwZY= r3qU17sIMZFyQ%3D&reserved=3D0 Status:=20 https://eur02.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdatat= racker.ietf.org%2Fdoc%2Fdraft-tiloca-core-observe-multicast-notifications= %2F&data=3D04%7C01%7Cmarco.tiloca%40ri.se%7C1e7128568c43481d565f08d8d= 752e5ff%7C5a9809cf0bcb413a838a09ecc40cc9e8%7C0%7C0%7C637496098328497827%7= CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haW= wiLCJXVCI6Mn0%3D%7C1000&sdata=3DBOHof%2BwACNYBwsyCiY9o2yW97C9k9epEMGF= 3xpI999I%3D&reserved=3D0 Htmlized:=20 https://eur02.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdatat= racker.ietf.org%2Fdoc%2Fhtml%2Fdraft-tiloca-core-observe-multicast-notifi= cations&data=3D04%7C01%7Cmarco.tiloca%40ri.se%7C1e7128568c43481d565f0= 8d8d752e5ff%7C5a9809cf0bcb413a838a09ecc40cc9e8%7C0%7C0%7C6374960983284978= 27%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik= 1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DmbCZ9xQd3aAXlRmS77UkFdUH3z0gpfV76= jel1O0hnDU%3D&reserved=3D0 Htmlized:=20 https://eur02.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools= =2Eietf.org%2Fhtml%2Fdraft-tiloca-core-observe-multicast-notifications-05= &data=3D04%7C01%7Cmarco.tiloca%40ri.se%7C1e7128568c43481d565f08d8d752= e5ff%7C5a9809cf0bcb413a838a09ecc40cc9e8%7C0%7C0%7C637496098328497827%7CUn= known%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiL= CJXVCI6Mn0%3D%7C1000&sdata=3DXP9q6ZsyZWutobEOjNN71SB%2BtxU%2FIxhf6iSG= b3hoWzc%3D&reserved=3D0 Diff:=20 https://eur02.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fwww.i= etf.org%2Frfcdiff%3Furl2%3Ddraft-tiloca-core-observe-multicast-notificati= ons-05&data=3D04%7C01%7Cmarco.tiloca%40ri.se%7C1e7128568c43481d565f08= d8d752e5ff%7C5a9809cf0bcb413a838a09ecc40cc9e8%7C0%7C0%7C63749609832849782= 7%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1= haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DHDL%2FerImQ5lHgreWJQwdzmMEHsxykRoP= G7WgirChwoQ%3D&reserved=3D0 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 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. Please note that it may take a couple of minutes from the time of submiss= ion until the htmlized version and diff are available at tools.ietf.org. The IETF Secretariat --------------36B07AEA396BB5DDE217A313 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hello CoRE,

We have recently submitted an update for the draft "Observe Notifications as CoAP Multicast Responses".

https://tools.ietf.or= g/html/draft-tiloca-core-observe-multicast-notifications-05

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, a Publish-Subscribe scenario with the Broker taking advantage of multicast.

This update especially covers:

1) The latest notification is now optional to include in the informative response from the server.

2) Added target attribute "grp_obs" to signal the possible use of multicast notifications.

3) Improved encoding of transport information, as 'tp_info' parameter specified in the informative response.

4) Revised processing in the presence of proxies, with updated examples in Appendix E and Appendix F.

5) New Appendix C, defining how the server may self-manage the OSCORE group.

6) New Appendix D, defining an optimization where the phantom request is a deterministic request [1].


Comments are very welcome!

Best,
/Marco

[1] https://datatracker.ietf.org/= doc/draft-amsuess-core-cachable-oscore/


-------- Forwarded Message --------
Sub= ject: New Version Notification for draft-tiloca-core-observe-multicast-notifications-05.txt
Dat= e: Mon, 22 Feb 2021 08:57:09 -0800
Fro= m: internet-drafts@ietf.org
To:= Christian Amsuess <christian@amsuess.com>, Francesca Palombini <francesca.palombini@ericsson.com>, = Marco Tiloca <marco.tiloca@ri.se>, Rikard Hoeglund <rikard.hoglund@ri.se>



A new version of I-D, draft-tiloca-core-observe-multicast-notifications-05.txt
has been successfully submitted by Marco Tiloca and posted to the IETF repository.

Name: draft-tiloca-core-observe-multicast-notifications
Revision: 05
Title: Observe Notifications as CoAP Multicast Responses
Document date: 2021-02-22
Group: Individual Submission
Pages: 67
URL: https://eur02.safelinks.protection.outlook.com/?url=3Dht= tps%3A%2F%2Fwww.ietf.org%2Farchive%2Fid%2Fdraft-tiloca-core-observe-multi= cast-notifications-05.txt&amp;data=3D04%7C01%7Cmarco.tiloca%40ri.se%7= C1e7128568c43481d565f08d8d752e5ff%7C5a9809cf0bcb413a838a09ecc40cc9e8%7C0%= 7C0%7C637496098328492857%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQ= IjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DmqUV%2B= r3bSEimgVSg2FtRsp7neKxwZYr3qU17sIMZFyQ%3D&amp;reserved=3D0
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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<= br> 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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