Deterministic Networking (detnet) Internet Drafts

      
 Deterministic Networking (DetNet) YANG Model
 
 draft-ietf-detnet-yang-20.txt
 Date: 23/02/2024
 Authors: Xuesong Geng, Yeoncheol Ryoo, Don Fedyk, Reshad Rahman, Zhenqiang Li
 Working Group: Deterministic Networking (detnet)
 This document contains the specification for the Deterministic Networking YANG Model for configuration and operational data of DetNet Flows. The model allows for provisioning of end-to-end DetNet service on devices along the path without dependency on any signaling protocol. It also specifies operational status for flows. The YANG module defined in this document conforms to the Network Management Datastore Architecture (NMDA).
 Operations,Administration,and Maintenance (OAM) for Deterministic Networks (DetNet) with IP Data Plane
 
 draft-ietf-detnet-ip-oam-13.txt
 Date: 14/02/2024
 Authors: Greg Mirsky, Mach Chen, David Black
 Working Group: Deterministic Networking (detnet)
 This document discusses the use of existing IP Operations, Administration, and Maintenance protocols and mechanisms in Deterministic Networking networks that use the IP data plane.
 Reliable and Available Wireless Technologies
 
 draft-ietf-raw-technologies-08.txt
 Date: 10/07/2023
 Authors: Pascal Thubert, Dave Cavalcanti, Xavier Vilajosana, Corinna Schmitt, Janos Farkas
 Working Group: Deterministic Networking (detnet)
 This document presents a series of recent technologies that are capable of time synchronization and scheduling of transmission, making them suitable to carry time-sensitive flows with high reliability and availability.
 Reliable and Available Wireless Architecture
 
 draft-ietf-raw-architecture-17.txt
 Date: 04/03/2024
 Authors: Pascal Thubert
 Working Group: Deterministic Networking (detnet)
 Reliable and Available Wireless (RAW) provides for high reliability and availability for IP connectivity across any combination of wired and wireless network segments. The RAW Architecture extends the DetNet Architecture and other standard IETF concepts and mechanisms to adapt to the specific challenges of the wireless medium, in particular intermittently lossy connectivity. This document defines a network control loop that optimizes the use of constrained spectrum and energy while maintaining the expected connectivity properties, typically reliability and latency. The loop involves DetNet Operational Plane functions, with a new recovery Function and a new Point of Local Repair operation, that dynamically selects the DetNet path(s) for the future packets to route around local degradations and failures.
 Deterministic Networking (DetNet): DetNet PREOF via MPLS over UDP/IP
 
 draft-ietf-detnet-mpls-over-ip-preof-11.txt
 Date: 22/02/2024
 Authors: Balazs Varga, Janos Farkas, Andrew Malis
 Working Group: Deterministic Networking (detnet)
 This document describes how DetNet IP data plane can support the Packet Replication, Elimination, and Ordering Functions (PREOF) built on the existing MPLS PREOF solution defined for DetNet MPLS Data Plane and the mechanisms defined by MPLS-over-UDP technology.
 Requirements for Scaling Deterministic Networks
 
 draft-ietf-detnet-scaling-requirements-05.txt
 Date: 20/11/2023
 Authors: Peng Liu, Yizhou Li, Toerless Eckert, Quan Xiong, Jeong-dong Ryoo, zhushiyin, Xuesong Geng
 Working Group: Deterministic Networking (detnet)
 Aiming at scaling deterministic networks, this document describes the technical and operational requirements when the network has large variation in latency among hops, great number of flows and/or multiple domains without the same time source. Different deterministic levels of applications co-exist and are transported in such a network. This document also describes the corresponding Deterministic Networking (DetNet) data plane enhancement requirements.
 Requirements for Reliable Wireless Industrial Services
 
 draft-ietf-detnet-raw-industrial-req-00.txt
 Date: 19/01/2024
 Authors: Rute Sofia, Paulo Mendes, Carlos Bernardos, Eve Schooler
 Working Group: Deterministic Networking (detnet)
 This document provides an overview of the communication requirements for handling reliable wireless services in the context of industrial environments. The aim of the draft is to raise awareness of the communication requirements of current and future wireless industrial services; how they can coexist with wired infrastructures; the key drivers for reliable wireless integration; the relevant communication requirements to be considered; the current and future challenges arising from the use of wireless services; and the potential benefits of wireless communication.

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Deterministic Networking (detnet)

WG Name Deterministic Networking
Acronym detnet
Area Routing Area (rtg)
State Active
Charter charter-ietf-detnet-04 Approved
Document dependencies
Additional resources Issue tracker, New Wiki, Zulip stream
Personnel Chairs János Farkas, Lou Berger
Area Director John Scudder
Tech Advisor David L. Black
Secretary Eve Schooler
Delegate Eve Schooler
Mailing list Address detnet@ietf.org
To subscribe https://www.ietf.org/mailman/listinfo/detnet
Archive https://mailarchive.ietf.org/arch/browse/detnet/
Chat Room address https://zulip.ietf.org/#narrow/stream/detnet

Charter for Working Group

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).

Milestones

Date Milestone Associated documents
Dec 2024 Submit first Enhanced DetNet Data Plane solution document for publication as Standards Track
Sep 2024 Submit RAW framework document for publication as informational draft-ietf-raw-framework
Jul 2024 Submit Requirements for Scaling Deterministic Networks for publication as Informational draft-ietf-detnet-scaling-requirements
Jul 2024 Submit controller plane framework for publication as Informational draft-ietf-detnet-controller-plane-framework
Mar 2024 Submit RAW architecture document for publication as Informational draft-ietf-raw-architecture
Mar 2024 Submit RAW OAM document for publication as Informational draft-ietf-raw-oam-support
Mar 2024 Adopt first Enhanced DetNet Data Plane solution document