3GPP 23.501 v20.2.0 — the document's own text
K.2.2.6 Configuration for transport protocols
Taught in 22. Clocks, TSN and deterministic delivery (The 5G system architecture, in depth).
The procedure described in this clause is applicable when the PTP Profile that is used for the PTP instance in 5GS defines multiple permitted transport protocols.
TSN AF or TSCTSF may use the element "Supported transport types" in port management information container (per DS-TT) to determine the supported transport types in the DS-TT. TSN AF or TSCTSF may use the element "Supported transport types" in UMIC (per NW-TT) to determine the supported transport types in the NW-TT.
The TSN AF or TSCTSF may use the element "Transport type" (per PTP instance) in PMIC to configure the transport protocol in use for the PTP instance in DS-TT. The TSN AF or TSCTSF may use the element "Transport type" (per PTP instance) in UMIC to configure the transport protocol in use for the PTP instance in NW-TT.
The PTP instance shall be configured to use one of the following transport protocols:
- Ethernet as described in Annex E of IEEE Std 1588 [126]. The Ethertype as defined for PTP shall be used. The related Ethernet frames carry the PTP multicast Ethernet destination MAC address.
- UDP over IPv4 as described in Annex C of IEEE Std 1588 [126],
- UDP over IPv6 as described in Annex D of IEEE Std 1588 [126].
Option 1 applies to Ethernet PDU Session type. Options 2 and 3 apply to IP PDU Session type or Ethernet PDU Session type with IP payload.