Section: 6.7.2 Requirements
Content: The 5G system shall allow flexible mechanisms to establish and enforce priority policies among the different services (e.g. MPS, Emergency, medical, Public Safety) and users. NOTE 1: Priority between different services is subject to regional or national regulatory and operator policies. The 5G system shall be able to provide the required QoS (e.g. reliability, end-to-end latency, and bandwidth) for a service and support prioritization of resources when necessary for that service. The 5G system shall enable the network operator to define and statically configure a maximum resource assignment for a specific service that can be adjusted based on the network state (e.g. during congestion, disaster, emergency and DDoS events) subject to regional or national regulatory and operator policies. The 5G system shall allow decoupling of the priority of a particular communication from the associated QoS characteristics such as end-to-end latency and reliability. The 5G system shall be able to support a harmonised QoS and policy framework applicable to multiple accesses. The 5G system shall be able to support E2E (e.g. UE to UE) QoS for a service. NOTE 2: E2E QoS needs to consider QoS in the access networks, backhaul, core network, and network to network interconnect. The 5G system shall be able to support QoS for applications in a Service Hosting Environment. A 5G system with multiple access technologies shall be able to select the combination of access technologies to serve an UE on the basis of the targeted priority, pre-emption, QoS parameters and access technology availability. The 5G system shall support a mechanism to determine suitable QoS parameters for traffic over a satellite backhaul, based e.g. on the latency and bandwidth of the specific backhaul . NOTE 3: The case where a backhaul connection has dynamically changed latency and/or bandwidth needs to be considered.