Deterministic Networking
charter-ietf-detnet-01-00

The Working Group is responsible for the overall DetNet architecture and
DetNet-specific specifications that encompasses 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 from any path setup protocol or mechanism. The working group
will also document DetNet Controller Plane [1] approaches that reuse
existing IETF solutions, such as Path Computation Element (PCE), and
identify the appropriate Working Group 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 explicitly excludes modifications of
transport protocols, OAM, Layer 3 forwarding, encapsulations, and
control plane protocols, but it may define requirements for such
modifications and identify the appropriate Working Group for any needed
modifications.

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 document how to use IP and/or MPLS, and
 related OAM, to support a data plane method of flow identification
 and packet forwarding over Layer 3. Other IETF defined data plane
 technologies may also be used.

 Controller Plane: This work will document how to use IETF control
 plane solutions to support DetNet. This work includes identification
 of any gaps in existing solutions and identifying the appropriate
 Working Group for any needed extensions.

 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 from
 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
 from the protocol(s) which 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.

 As needed, vertical requirements: This effort will detail the
 requirements for deterministic networks in various industries that
 have previously not been documented or 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, PCE, PALS, TEAS, OSPF, IS-IS, 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).

[1] The DetNet Controller Plane is defined in RFC 8655 as "the
aggregation of the Control and Management Planes"