Understanding QoS applicability in 5G transport networks

5G transport networks will need to accommodate a wide spectrum of services on top of the same physical infrastructure and network slicing is seen as a suitable candidate for providing the necessary quality of service (QoS). Traffic differentiation is usually enforced at the border of the network in order to ensure a proper forwarding of the traffic according to its class through the backbone. With network slicing, the traffic may now traverse many slice edges where the traffic policy needs to be enforced, discriminated and ensured, according to the service and tenants needs. The goal of this article is hence to analyze the impact of different QoS policies in case of having multiple network slices carrying fixed and mobile traffic.This work has been partially funded by the EU H2020 5GTransformer Project (grant no. 761536) and the H2020 collaborative Europe/Taiwan research project 5G-CORAL (grant no. 761586)