Transport networks for 5G will be more versatile than today and characterized by the different 5G use cases and different network architectures and also by different kinds of operator networks and different operating models. The very first transport question for the 5G system is, how much capacity is needed for the transport network, for the first mile link, and from any hub point upward? At the 5G nodes (gNB, gNB-DU, gNB-CU, etc.), physical interfaces that connect the mobile node to the network are in practice Ethernet ports. Compared to other 5G network transport segments, the low layer fronthaul is very different from the backhaul or from the high layer fronthaul, due to requirements for low latency and high capacity. Possible application areas of TSN in 5G are in the low layer fronthaul and with the URLLC and IOT use cases.