Re: [Qirg] Call for agenda items at the IETF 118

[Wojciech Kozlowski <[e-mail]>]

Hi Diego et al.

Apologies for taking so long to get around to reading through the document, but at least it's in time for the IETF 119.

First, I have to say that I find it really valuable to have a discussion on this subject and so it's great to see a draft on it. Europe is investing a lot of money into building QKD infrastructure, and it is already expected that these will become entanglement networks in the future. Therefore, there is a lot of value in identifying the common elements of the architecture and using the QIRG as a venue to already see what lessons we can learn from the QKD deployments that can benefit entanglement networks.

I've just read through the draft and have some remarks that I thought to share/discuss. At this stage, I'll try to focus on the few main conceptual points.


  1.  I do find all of Rod's questions still relevant, and I don't think they've been answered on the mailing list yet. The e-mail in question: https://mailarchive.ietf.org/arch/msg/qirg/k-ceak6qkD6JSQ0Jn-NFZuy6AqA/.

  2.  Following up on Rodney's questions about the ITU - is this architecture inconsistent with what the ITU is proposing? I guess the "key" question is whether key relaying is done in a separate "key management" layer or whether it's part of what you call the "quantum forwarding plane". Is that the only difference?

  3.  Perhaps I'm too naïve about SDN and control planes, but I was somewhat bothered by the fact that the document constantly refers to SDN controllers while the draft was about networking planes and strata. In principle, and to the extent this draft is concerned, one can discuss networking plane functionalities without assuming a particular implementation - in this case of a logically centralised SDN controller. I think it is worth separating a controller implementation from this multiplane draft simply because it is entirely possible to build a QKD network with the same networking planes, but no centralised controller for a control plane. Do you think these concepts can be separated or do you see them as intrinsically linked to each other?

  4.  I was a bit lost in the transition from Section 3 to Section 4. Section 3 talks about a Service Overlay Plane and then in Section 4 we jump into a Service Stratum. Having stared for ages at the big stratum diagram I can see the usefulness of this separation - I understand that the key benefit is the ability to logically separate the control and management planes of the different strata - is that correct? I think the rationale for using CLAS is there in the text, but it doesn't stand out very strongly. Could you perhaps make it easier to understand why CLAS is good for quantum networks? Intuitively, it looks really attractive to me, because it seems that one can simply replace the forwarding stratum with repeaters while the service stratum remains QKD and one can now run QKD over untrusted repeaters!

  5.  It is clear that there a lot of lessons you have learned in your QKD deployments and that have been presented in this draft and I think we could benefit if the draft was much more explicit about their relevance to entanglement-based networks. This relates to Rod's first question, and I do think it is an important one in the context of QIRG. As I see it: the connectivity stratum, i.e., the OTN remains the same for both QKD and entanglement networks - they both need optical fibres. The quantum forwarding stratum would change in between QKD and entanglement networks - or at least evolve more steadily from QKD to entanglement in an isolated fashion hidden behind the standard inter-stratum APIs. And then the service stratum can remain unchanged if all one cares about is QKD - one simply gains additional security with an entanglement-based forwarding stratum - or it can evolve to provide new applications. Would it make sense to involve a bit of discussion on what the service stratum could look like for applications beyond QKD?

  6.  Do you see any of the ETSI APIs as suitable for the inter-stratum APIs?

I hope you find this helpful in your next iteration of the draft!

Thanks,
Wojtek

From: Qirg <[e-mail]> On Behalf Of Diego R. Lopez
Sent: Sunday, October 22, 2023 9:01 PM
To: Martin Stiemerling <[e-mail]>
Cc: [e-mail]
Subject: Re: [Qirg] Call for agenda items at the IETF 118

Hi Martin and you all,

I have just uploaded the -00 "unshameful" initial version of this proposal based on our experience of QKD deployment. It is an initial proposal with a few gaps to fill, intended to provide a reference framework useful for future developments. We will have the opportunity to discuss about it in Prague. In the meantime, comments, suggestions, and contributions are extremely welcome.

A new version of Internet-Draft draft-lopez-qirg-qi-multiplane-arch-00.txt has
been successfully submitted by Diego Lopez and posted to the
IETF repository.

Name:     draft-lopez-qirg-qi-multiplane-arch
Revision: 00
Title:    A Multiplane Architecture Proposal for the Quantum Internet
Date:     2023-10-22
Group:    Individual Submission
Pages:    14
URL:      https://www.ietf.org/archive/id/draft-lopez-qirg-qi-multiplane-arch-00.txt<https://urldefense.com/v3/__https:/www.ietf.org/archive/id/draft-lopez-qirg-qi-multiplane-arch-00.txt__;!!PAKc-5URQlI!5FX0tcN-Aoq4GgyKyRw828cRjrAHZ4xWjFjYsgTcAEkvc-gJWu4PhXa3f_0sN7tWgWaNGFlpdzP7Z7XeGyS_j28FiP80_hdWmg$>
Status:   https://datatracker.ietf.org/doc/draft-lopez-qirg-qi-multiplane-arch/<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/draft-lopez-qirg-qi-multiplane-arch/__;!!PAKc-5URQlI!5FX0tcN-Aoq4GgyKyRw828cRjrAHZ4xWjFjYsgTcAEkvc-gJWu4PhXa3f_0sN7tWgWaNGFlpdzP7Z7XeGyS_j28FiP-9msMCeQ$>
HTML:     https://www.ietf.org/archive/id/draft-lopez-qirg-qi-multiplane-arch-00.html<https://urldefense.com/v3/__https:/www.ietf.org/archive/id/draft-lopez-qirg-qi-multiplane-arch-00.html__;!!PAKc-5URQlI!5FX0tcN-Aoq4GgyKyRw828cRjrAHZ4xWjFjYsgTcAEkvc-gJWu4PhXa3f_0sN7tWgWaNGFlpdzP7Z7XeGyS_j28FiP-Pp-OM7A$>
HTMLized: https://datatracker.ietf.org/doc/html/draft-lopez-qirg-qi-multiplane-arch<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/html/draft-lopez-qirg-qi-multiplane-arch__;!!PAKc-5URQlI!5FX0tcN-Aoq4GgyKyRw828cRjrAHZ4xWjFjYsgTcAEkvc-gJWu4PhXa3f_0sN7tWgWaNGFlpdzP7Z7XeGyS_j28FiP-tg8YJkw$>

Abstract:
   A consistent reference architecture model for the Quantum Internet is
   required to progress in its evolution, providing a framework for the
   integration of the protocols applicable to it, and enabling the
   advance of the applications based on it.  This model has to satisfy
   three essential requirements: agility, so it is able to adapt to the
   evolution of quantum communications base technologies,
   sustainability, with open availability in technological and
   economical terms, and pliability, being able to integrate with the
   operations and management procedures in current networks.  This
   document proposes such an architecture framework, based on the
   already extensive experience in the deployment of QKD network
   infrastructures and related initiatives on the integration of network
   infrastructures and services.
Be goode,

--
"Esta vez no fallaremos, Doctor Infierno"

Dr Diego R. Lopez
Telefonica I+D
https://www.linkedin.com/dr2lopez/<https://urldefense.com/v3/__https:/www.linkedin.com/dr2lopez/__;!!PAKc-5URQlI!5FX0tcN-Aoq4GgyKyRw828cRjrAHZ4xWjFjYsgTcAEkvc-gJWu4PhXa3f_0sN7tWgWaNGFlpdzP7Z7XeGyS_j28FiP8qL-MxHg$>

e-mail: [e-mail]<mailto:[e-mail]>
Mobile: [phone]
---------------------------------

On 18/9/23, 15:24, <[e-mail]<mailto:[e-mail]>> wrote:

Hi Martin,

I am trying to have an "unshameful" version (once that the group can read without me feeling bad) so it can be presented at the meeting in Prague. I do hope the pile of pending matters I have found when I came back from my summer holidays will allow me.

My idea is to introduce this unshameful, yet incomplete, version in Prague, and seek for collaboration.

Be goode,

--
"Esta vez no fallaremos, Doctor Infierno"

Dr Diego R. Lopez
Telefonica I+D
https://www.linkedin.com/dr2lopez/<https://urldefense.com/v3/__https:/www.linkedin.com/dr2lopez/__;!!PAKc-5URQlI!5FX0tcN-Aoq4GgyKyRw828cRjrAHZ4xWjFjYsgTcAEkvc-gJWu4PhXa3f_0sN7tWgWaNGFlpdzP7Z7XeGyS_j28FiP8qL-MxHg$>

e-mail: [e-mail]<mailto:[e-mail]>
Mobile: [phone]
---------------------------------

On 12/9/23, 18:14, <[e-mail]<mailto:[e-mail]>> wrote:

Hi Diego,

Any time plan when you publish this document (I-D or paper)?

Thanks,

  Martin

> Am 12.09.2023 um 07:14 schrieb Diego R. Lopez <[e-mail]<mailto:[e-mail]>>:
>
> Hi Wojtek,
>  As discussed in Yokohama, and briefly on the list later on, we are working on a document analyzing the lessons learned from the QKD deployments, trying to identify some architectural patterns for the Quantum Internet. Though the work has not gone as fast as I intended, we have drafted some ideas I think are worth discussing, so I'd be interested in introducing them at a meeting in Prague.
>  Be goode,
>  --
> "Esta vez no fallaremos, Doctor Infierno"
>  Dr Diego R. Lopez
> Telefonica I+D
> https://www.linkedin.com/dr2lopez/<https://urldefense.com/v3/__https:/www.linkedin.com/dr2lopez/__;!!PAKc-5URQlI!5FX0tcN-Aoq4GgyKyRw828cRjrAHZ4xWjFjYsgTcAEkvc-gJWu4PhXa3f_0sN7tWgWaNGFlpdzP7Z7XeGyS_j28FiP8qL-MxHg$>
>  e-mail: [e-mail]<mailto:[e-mail]>
> Mobile: [phone]
> ---------------------------------
>  On 11/9/23, 15:20, <[e-mail]<mailto:[e-mail]>> wrote:
>  Dear QIRG,
>  It seems there is some interest in a face-to-face meeting in Prague at the IETF 118 between 4-10 November.
>  If you would like to present at the QIRG meeting at the IETF 118, could you please e-mail the QIRG chairs [e-mail]<mailto:[e-mail]> (or reply to this e-mail) by Monday 18 September.
>  I would like to encourage the QIRG community to come forward and give talks that they think would be interesting to the community and might foster research collaboration. There is no need to propose a draft or any other similar work item. Since this is the European IETF, I would like to encourage any participants working on EuroQCI projects to come and share their plans, roadmap, and/or lessons learned on networking topics in this area.  Many thanks,
> Wojtek
>
>
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