establish, with a node of a wireless communication network, a packet data unit (PDU) session for communication of messages for one or more protocols including precision time protocol (PTP) messages associated with one or more timing domains;

transmit an upstream PTP message that includes one or more indicators of the one or more timing domains supported by the apparatus, wherein the one or more indicators of the one or more timing domains supported by the apparatus comprise a domain number included in a header associated with the upstream PTP message; and

receive, via the established PDU session and from the node, a downstream PTP message that includes an indication of the one or more timing domains associated with the established PDU session, the downstream PTP message originating from a time sensitive network node and is associated with a timing domain of the one or more timing domains, wherein a field of the downstream PTP message is adjusted based on a link delay between the time sensitive network node and the node; wherein the node comprises a user plane function (UPF).