Minutes interim-2019-nmrg-08: Mon 11:00
||Minutes interim-2019-nmrg-08: Mon 11:00
NMRG Virtual Meeting July 2019
Monday 01-07-2019 11:00-13-00 CEST
Laurent Ciavaglia (co-chair, Nokia), Jérôme François (co-chair, INRIA),
Pedro Martinez-Julia (NMRG secretary, NICT), Abdelkader Lahmadi (INRIA),
Will Liuscheng (Huawei), Minsuk Kim (ETRI), Walter Cerroni (University of
Bologna), Marinos Charalambides (UCL), Dhruv Dhody (Huawei), Vishnu Ram
(Technical Consultant, ITU-T ML5G FG), Mehdi Bezahad (Lancaster University)
* Agenda: https://datatracker.ietf.org/doc/agenda-interim-2019-nmrg-08-nmrg-01/
https://datatracker.ietf.org/meeting/interim-2019-nmrg-08/session/nmrg * Webex:
- 10 min Status of WG and next meetings, Laurent & Jérôme
- 20 min Intent Based Networking, Laurent & Jérôme
+ Status progress on Intent Based Networking
+ Feedback from San Jose meeting
++ Minutes will be sent soon
++ Potential use cases: Data-Center Networks and interconnect,
augmented with Enteprise networks, 5G verticals (different 5G use
cases on the same infra, 5G slicing), more "common"
digital/communication services provider use case ++ WIP: Propose
a basic use case template (how to describe and exploit a use
case) ++ continue work on the terminology
Marinos: architectural aspects discussed ?
Laurent: not really. People were not deeply involved in IBN, so we stay at a
higher level. Marino: how to move this work forward? Laurent: yes, refinement
of IBN workplan, open call for contributions to follow (no existing document)
+ Intent lifecycle and operating principles (outcome of the discussion
of Laurent and Alex Clemm)
++ different from an architecture
++ objective: agree on a lifecycle on IBN (less controversial than
an architecture), faster confergence time ++ Initial lefecycle
diagram: will be updated in next days
Abdelkader: what is the level of automation? seems to be very manual, what is
the benefit of using intent in that case? Laurent: once the intent is
provided, then everything should be automated or intent can be extracted from
the user-related data. Iterative refinement of the intent with the user (work
from Lisandro and Arthur). In the middle of this diagram, there is also the
operator to define how the system has to catch the intents. Automation will
also depend on the capabilities of the system. On the left side, "user" inputs
are manual, everything else on the right side is/could be automatic.
Abdelkader: so the user is not necessary a human, can be an application?
Laurent: here the user is more a human user. So we may extend this diagram.
user may also be an interface or system a human user is using to interact with
the IB system (e.g. a vertical industry and 5G network). Abdelkader: regarding
the work of Arthur, what could be good is to would have a set of labels to
recognize elements in the intent expressions. Laurent: an interesting area to
explore. The diagram is incomplete, need to identify inputs/ouputs and also
supporting elements such as info and data models. In IBN, there is usually a
restricted language to express intents but in NMRG how can we be more flexible
with dynamic environment, dynamic mapping of ontologies and system
capabilities. Walter: need some sort of standardized interface between user
space and system space, and even at the lower level when applying intents
(preparation and operation phase). Do you think there could be also
standardized interfaces between functions ? Laurent: no immediate answer, part
of our investigation to define what level of standardization we would need but
the less the better to keep flexibility. If we document external intertfaces,
it will be a good achivement of the group. The goal is to minimize the
standardization needed. Jérôme: more backward paths to the intermediate
functions Laurent: agree, need to improve this, not only through report. Avoid
to be too much complete/detailed in first shot, in order to avoid entering in
architectural design, keep as high level bastraction as possible for the
lifecycle but still being useful in guiding work. Marinos: operator should
express policies (at the right) and need also to be decomposed. there could be
Laurent: agree. consider them as orthogonal dimensions: service intent and
operation intent. not coming from the same actor, nor targeting the same
goals. Mehdi: is this presentation recorded? Is the user space only humans?
Laurent: I don't think there is a video recording but materials is available
on the nmrg webpage. For second question, this is WIP and diagram incomplete.
The user is a human user (in the diagram). The user space is where intent are
expressed. Mehdi: I'm involved in a UK project with BT. Who can ask the
intents: provider, users.. ? Laurent: question fully valid, work regarding
use case is in progress (actors, roles)... Medhi: who is "we" Laurent:
Laurent from Nokia, acting as NMRG co-chair and contributor , what I am
presetning here is as a contributor.
+ Montreal meeting call for contributions: call for presentations for
the regular session (topic: IBN) and technical meeting (topic also IBN,
more deep discussion expected).
- Network AI
+ 15 min: challenge, Jérôme François
Laurent: should keep/develop link with IETF (but not only): expertise,
knowledge about protocol issues (operational), presentations on measurement
and analysis. WG/RG. bidirectional (bring AI/knowledge/novelty)(and beefit
from feedback, expertise) Will: take the use cases from (?) Jérôme: identify
existing use cses, document new ones. define the criteria.
+ 20 min: Intelligent Management for Edge-computing, Minsuk kim
Laurent: we did not give you enough time (sorry), we'll see what we can do as
next steps for these work in NMRG. Need to discuss with Jérôme.
+ 20 min: Intelligent Reasoning on External Events for Network
Management: Positioning, Challenges, and Framework, Pedro Martinez-Julia
+ 20 min: Self-driving networks, Abdelkader Lahmadi
Jérôme: Self-driving networks always suppose programmability?
Abdelkader: yes but of course depends on the level of automation
Mehdi: if we tweak legacy networks, can we still need programmability
Abdelkader: hard task to tweak
Mehdi: do we mean a clean-slate approach or do you think that current
network with this enabling technology is sufficent Abdelkader: prepare
for self-driving networks (clean-slate approach), for current approach
we can have less automation
xxmin. - Any other business?