5.27.1a Periodic deterministic communication

This clause describes 5G System features that allow support of periodic deterministic communication where the traffic characteristics are known a-priori and a schedule for transmission from the UE to a downstream node, or from the UPF to an upstream node is provided via external protocols outside the scope of 3GPP (e.g. IEEE 802.1 TSN).

The features include the following:

• Providing TSC Assistance Information (TSCAI) that describe TSC flow traffic characteristics (as described in clause 5.27.2) at the gNB ingress and the egress of the UE for traffic in downlink and uplink direction, respectively;
• Support for hold & forward buffering mechanism (see clause 5.27.4) in DS-TT and NW-TT to de-jitter flows that have traversed the 5G System.