Liaison statement
LS on work items related to deterministic networking in ITU-T SG13

LS/o on a consented and two on-going work items on deterministic communication
services and networking in SG13 of ITU-T.

ITU-T Study Group 13 would like to inform you that Question 6 of SG13 has one
consented and two on-going work items related to deterministic communication
services and networking for the scope of local area networks and large-scale
networks of the IMT-2020 network and beyond.

The three draft Recommendations are as following. Their corresponding documents
are attached. Draft new Recommendation ITU-T Y.3118 (formerly
Y.IMT-2020-jg-lsn) “Requirements and framework for jitter guarantee in large
scale networks including IMT-2020 and beyond” Draft Recommendation ITU-T
Y.IMT-2020-fa-lg-lsn “Functional architecture for latency guarantee in large
scale networks including IMT-2020 and beyond” Draft Recommendation ITU-T
Y.det-qos-reqts-lan “QoS requirements and framework for supporting
deterministic communication services in local area network for IMT-2020”

Y.3118 specifies the requirements and framework for jitter guarantee in large
scale networks, with packet time-stamping and buffers at the network boundary
without time-synchronization. It has been consented for the approval process in
the July 2022 ITU-T SG13 meeting.

Y.IMT2020-fa-lg-lsn specifies the functional architecture and operation
procedures for latency guarantee in large scale networks, with work-conserving
schedulers and interleaved regulators for flow aggregates. It is the sequel of
ITU-T Y.3113, which defines the requirements and framework for latency
guarantee in large scale networks.

Y.det-qos-reqts-lan identifies the scenarios, QoS requirements, and framework
of deterministic communication services in local area networks supporting
heterogeneous technologies.

This information is for your consideration and we look forward to collaborating
with you in this area.