[Detnet] WG Action: Rechartered Deterministic Networking (detnet)

The IESG <iesg-secretary@ietf.org> Fri, 01 December 2023 18:55 UTC

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Subject: [Detnet] WG Action: Rechartered Deterministic Networking (detnet)
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The Deterministic Networking (detnet) WG in the Routing Area of the IETF has
been rechartered. For additional information, please contact the Area
Directors or the WG Chairs.

Deterministic Networking (detnet)
Current status: Active WG

  Lou Berger <lberger@labn.net>
  János Farkas <janos.farkas@ericsson.com>

  Eve Schooler <eve.schooler@gmail.com>

Assigned Area Director:
  John Scudder <jgs@juniper.net>

Routing Area Directors:
  John Scudder <jgs@juniper.net>
  Jim Guichard <james.n.guichard@futurewei.com>
  Andrew Alston <andrew-ietf@liquid.tech>

Technical advisors:
  David Black <david.black@dell.com>

Mailing list:
  Address: detnet@ietf.org
  To subscribe: https://www.ietf.org/mailman/listinfo/detnet
  Archive: https://mailarchive.ietf.org/arch/browse/detnet/

Group page: https://datatracker.ietf.org/group/detnet/

Charter: https://datatracker.ietf.org/doc/charter-ietf-detnet/

The Deterministic Networking (DetNet) Working Group focuses on deterministic
data paths that operate over Layer 2 bridged and Layer 3 routed segments,
where such paths can provide bounds on reordering, latency, loss, and packet
delay variation (jitter), and high reliability. DetNet solutions apply to
both wireless and wired networks. The Working Group addresses Layer 3 aspects
in support of applications requiring deterministic networking. The Working
Group collaborates with IEEE802.1 Time-Sensitive Networking (TSN), which is
responsible for Layer 2 operations, to define a common architecture for both
Layer 2 and Layer 3. Example applications for deterministic networks include
professional and home audio/video, multimedia in transportation, engine
control systems, and other general industrial and vehicular applications
being considered by the IEEE 802.1 TSN Task Group.

The Working Group will initially focus on solutions for networks that are
under a single administrative control or within a closed group of
administrative control; these include not only campus-wide networks but also
private WANs. The DetNet WG will not spend energy on solutions for large
groups of domains such as the Internet.

The Working Group is responsible for the overall DetNet architecture and
DetNet-specific specifications that encompass the data plane, OAM
(Operations, Administration, and Maintenance), time synchronization,
management, control, and security aspects which are required to enable a
multi-hop path, and forwarding along the path, with the deterministic
properties of controlled latency, low packet loss, low packet delay
variation, and high reliability. The work applies to point-to-point (unicast)
and point-to-multipoint (multicast) flows which can be characterized in a
manner that allows the network to 1) reserve the appropriate resources for
the flows in advance, and 2) release/reuse the resources when they are no
longer required. The work covers the characterization of flows, the
encapsulation of frames, the required forwarding behaviors, as well as the
state that may need to be established in intermediate nodes. Layer 3 data
plane technologies that can be used include: IP and MPLS, and Layer 2
encapsulations that run over IP and/or MPLS, such as pseudowires and GRE.

The Working Group will document which deployment environments and types of
topologies are within (or outside) the scope of the DetNet architecture. This
work focuses on the data plane aspects and is independent of any path setup
protocol or mechanism. The Working Group will also document DetNet Controller
Plane approaches that reuse existing IETF solutions, such as Path Computation
Element (PCE), and identify the Working Group responsible for any extensions
needed to support DetNet. Documents produced by the Working Group will be
compatible with the work done in IEEE802.1 TSN and other IETF Working Groups.
 The Working Group's scope generally excludes modifications of transport
protocols, OAM, Layer 3 forwarding, and encapsulations, but it may discuss
requirements for such modifications and the work will be coordinated with the
Working Group responsible for the technology.

DetNet is chartered to work in the following areas:

Overall architecture: This work encompasses the data plane, OAM, time
synchronization, management, control, and security aspects.

Data plane: This work will specify how to use IP and/or MPLS, and related
OAM, to support a data plane method of flow identification and packet
treatment over Layer 3. Other IETF-defined data plane technologies may also
be used.

Controller Plane: The DetNet Controller Plane is defined in RFC 8655 as "the
aggregation of the Control and Management Planes". This work will document
how to use IETF control plane solutions to support DetNet, including the
identification of any gaps in existing solutions. Any modification to
Controller Plane protocols to address identified gaps should be carried out
in their associated Working Groups, but may be done in DetNet if agreed to by
the relevant Working Group chairs and responsible Area Directors.

Data flow information model: This work will identify the information needed
for flow establishment and control and be used by reservation protocols and
YANG data models. The work will be independent of the protocol(s) used to
control the flows (e.g. YANG+NETCONF/RESTCONF, PCEP, or GMPLS).

YANG models: This work will document device and link capabilities (feature
support) and resources (e.g. buffers, bandwidth) for use in device
configuration and status reporting. Such information may also be used when
advertising the deterministic network elements to a control plane. Control
plane-related information will be independent of the protocol(s) that may be
used to advertise this information (e.g. IS-IS or GMPLS extensions). Any new
YANG models will be coordinated with the Working Groups that define any base
models that are to be augmented.

DetNets including Wireless: This work will define how DetNet solutions
operate over networks that include wired and wireless network technologies.
The work may include providing DetNet reliability and availability for
scheduled wireless segments and other wireless media, e.g.,
frequency/time-sharing physical media resources with stochastic traffic: IEEE
Std. 802.15.4 timeslotted channel hopping (TSCH), 3GPP 5G ultra-reliable low
latency communications (URLLC), IEEE 802.11ax/be, and L-band Digital
Aeronautical Communications System (LDACS), etc. This work will stay abstract
to the radio layers underneath, addressing the Layer 3 aspects in support of
applications requiring high reliability and availability.

As needed, vertical requirements: This effort will detail the requirements
for deterministic networks in various industries that have previously not
been documented and cannot be supported using defined DetNet solutions.

To investigate whether existing data plane encryption mechanisms can be
applied, possibly opportunistically, to improve security and privacy.

The Working Group coordinates with other relevant IETF Working Groups,
including CCAMP, IPPM, LSR, PCE, PALS, TEAS, TSVWG, RAW, and 6TiSCH. As the
work progresses, requirements may be provided to the responsible Working
Group, e.g. PCE, TEAS, and CCAMP, with DetNet acting as a focal point to
maintain the consistency of the overall architecture and related solutions.
The WG will liaise with appropriate groups in IEEE and other Standards
Development Organizations (SDOs).


  Mar 2024 - Adopt first Enhanced DetNet Data Plane solution document

  Mar 2024 - Submit RAW OAM document for publication as Informational

  Mar 2024 - Submit RAW architecture document for publication as Informational

  Jul 2024 - Submit controller plane framework for publication as

  Jul 2024 - Submit Requirements for Scaling Deterministic Networks for
  publication as Informational

  Sep 2024 - Submit RAW framework document for publication as informational

  Dec 2024 - Submit first Enhanced DetNet Data Plane solution document for
  publication as Standards Track