Re: [nmrg] network digital twin vs. digital twin network

[Cheng Zhou <[e-mail]>]

Hi All, 

 

As Diego mentioned, we have discussed this topic some time ago. I remembered
that the conclusion was to remove acronym ‘DTN’ to avoid conflict with
‘Delay/Disruption Tolerant Networking’ (a working group of IETF).  However,
we didn’t decide to change the term of ‘digital twin network’. 

As one of the coauthors, I am open on both names. However, I still prefer to
use ‘digital twin network’ with below concerns. 

1)      Network is the target filed to implement Digital Twin technology.
As DT used in other industrial fields, similar terms  ‘DTxx ‘ are being
used, such as ‘digital twin city’, ‘digital twin manufacturing’, ‘digital
twin factory’, ‘digital twin energy’, etc. The terms are with same meaning
as ‘DT for xxx’. And in definition of current draft, we also pointed that
‘digital twin network’ is also called digital twin for networks.’  

Digital twin network: a digital twin that is used in the context of
networking. This is also called, digital twin for networks. 

2)      If not considering the acronym confliction, DTN can be a better
acronym for a relatively systematic networking technology, such as SDN, CDN,
IBN, TSN, etc.   

3)      In academy, both NDT and DTN can be seen. And, the there seems a bit
more papers using of ‘DTN/digital twin network’ or the extensions, such as
‘digital twin edge network’, ‘digital twin optical network’, ‘digital twin
5G network’, etc. And from extension perspective, DTN seems more easily to
be extended to specific network domains, with terms of DTxN.

4)      In some other SDOs such as ITU-T, 3GPP, the term of ‘Digital twin
network’ is being used. 

 

Regarding the difference between ‘digital twin network’ and ‘network digital
twin’ in this draft,  DTN can be the whole interactive virtual-real mapping
system, building with the DT concept or techniques; and NDT can be the
twinning entity of the physical network, focusing on data and models in
digital twin layer. Hope this can help remove the confusion. 

 

More comments are welcome. 

 

Thank and Best Regards,

Cheng Zhou

 

From: nmrg [mailto:[e-mail]] On Behalf Of Diego R. Lopez
Sent: Tuesday, March 7, 2023 11:01 PM
To: Christopher Janz; Jürgen Schönwälder; [e-mail]
Subject: Re: [nmrg] network digital twin vs. digital twin network

 

Hi,

 

Thanks for the observation and the recommendations.

 

As one of the coauthors, let me say we already went through this discussion
some time ago, and my reckoning is that the use of the term DTN, initially
employed, was caused by some language misunderstanding, and that we all
agreed on moving towards the more adequate NDT. If there are still remnants
of the old naming in the document, this is something that obviously needs to
be solved.

 

Be goode,

 

--

“Esta vez no fallaremos, Doctor Infierno”

 

Dr Diego R. Lopez

Telefonica I+D

 <https://www.linkedin.com/dr2lopez/> https://www.linkedin.com/dr2lopez/

 

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

Mobile: [phone]

---------------------------------

 

On 7/3/23, 15:38, <[e-mail]> wrote:

 

Good observation Juergen. I'll let the authors of [1] speak with respect to
their document, but looking elsewhere (e.g., ETSI ZSM, papers, etc.) as well
as at normal English language usage:

- the digital twin of a network is properly a 'network digital twin' - this
is the clear native interpretation of the term as well as the broadly used
sense.
- 'digital twin network' does not broadly have the connotation you suggest
(a network operated by a digital twin), nor does the term intrinsically
suggest such a meaning. If anything, the term suggests a network used in the
implementation of a digital twin. I'd thus suggest the term is not a very
useful one.

Best

Chris


-----Original Message-----
From: nmrg <[e-mail]> On Behalf Of Jürgen Schönwälder
Sent: Tuesday, March 7, 2023 9:28 AM
To: [e-mail]
Subject: [nmrg] network digital twin vs. digital twin network

Hi,

I see both terms being used in [1] but only one of them is defined and I am
a bit confused about what the exect difference is between these two terms.
Perhaps both should have a clear and explicit definition?

Naively, I assumed that the digitial twin of a network would be called a
'network digital twin' and that a network that is operated by using digital
twins as a 'digital twin network' but that does not seem to align with what
[1] says.

/js

[1] <draft-irtf-nmrg-network-digital-twin-arch-02>

-- 
Jürgen Schönwälder              Constructor University Bremen gGmbH
Phone: [phone]         Campus Ring 1 | 28759 Bremen | Germany
Fax:   [phone]         <https://constructor.university/>

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