Liaison statement
Liaison response to work items related to deterministic communication in ITU-T SG13

The IEEE 802.1 Working Group would like to thank ITU-T Study Group 13 for the
information provided in liaison statement SG13-LS217 about work items related
to deterministic communication in ITU-T SG13.

From an organizational perspective, there are three coordinated standardization
initiatives for deterministic communication: • IEEE: Time-Sensitive Networking
(TSN) • IETF: Deterministic Networking (DetNet) • 3GPP: SA Working Group 2

As part of IEEE 802, the IEEE 802.1 TSN Task Group (TSN TG) is focused on TSN
scoped to Local/Metropolitan Area Networks. For application areas that require
deterministic communication in a Local/Metropolitan Area Network, a TSN profile
standard is standardized. Examples of ongoing TSN profile projects include: •
IEC/IEEE 60802: TSN Profile for Industrial Automation • IEEE P802.1DG: TSN
Profile for Automotive In-Vehicle Ethernet Communications • IEEE P802.1DP / SAE
AS 6675: TSN for Aerospace Onboard Ethernet Communications

With each application profile, the TSN TG coordinates with the leading
standardization organization for that application (e.g., IEC for industrial
automation, SAE International for aerospace). This helps to meet the needs of
that application profile in a Local/Metropolitan Area Network.

Many of these applications have needs beyond a Local/Metropolitan Area Network,
including the Internet and 5G/6G networks. The TSN TG uses its coordination
with IETF and 3GPP to help meet those needs as well. The overall goal is to
provide coordination among standardization initiatives for deterministic
communication.

The work items related to deterministic communication in ITU-T SG13 appear to
be proposed independently of this coordination. The risk of such independence
is that ITU-T SG13 could miss out on much of the coordination with the
applications that ITU-T SG13 work items aim to target (such as smart industry).

The IEEE 802.1 Working Group also looks forward to continued collaboration with
ITU-T SG13. In that spirit, please find in Annex our technical considerations
related to the documents attached to your liaison statement. Additionally, in
the context of deterministic communication, we invite ITU-T SG13 to work as an
integrated part of the coordination described above. We are happy to develop
our TSN technology further to address needs and requirements as they arise. We
welcome you and any interested parties to join, contribute, and work together
towards addressing market needs.

Note that the IEEE 802 work is open and contribution driven. Participation is
on an individual basis and technical discussion can be conducted based on
individual contributions. The TSN Task Group holds regular electronic meetings:
details are available at https://1.ieee802.org/wg-calendar.