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Requirements for 5G transport are in many ways impacted by 5G system targets and performance, 5G use cases, 5G network architecture and new 5G features like network slicing. Radio technology components like massive MIMO and beamforming lead to high transport capacities which have to be carried over the fronthaul and backhaul. URLLC, IAB, Open RAN and 5G advanced introduce further specific requirements. Understanding of 5G system and radio is essential for the analysis of transport requirements.