le Ultra-Broadband to the creation of a separate network slice (or slices) for massive IoT deployments. Due to very low latency in IMT-2020 mobile networks, a separate network slice (or slices) can be allocated to ultra-reliable low-latency services. One may expect SDN and NFV to be used for realization of network slicing and even further extend the possibilities for offering customized services with different requirements on QoS (and other network functions) between slices and within a given network slice. So, different slices can provide different QoS for the same type of services (ToSs) (managed VoIP and OTT VoIP as one explicit example). Considering the requirements in IMT-2020 to have access-agnostic network architec- ture [13], with a unified core network, there is a need to decouple control mechanisms from the radio access technologies. IMT-2020 leads the fixed-mobile convergence (FMC) one step further, allowing complementary network performance by using both fixed and mobile connections. However, service continuity at handover events between fixed and mobile networks should support the guaranteed QoS for the given service [16]. Guaranteed QoS is required in all cases, including single and multiple access network connections. The following two scenarios outline the FMC application in IMT-2020: Fixed access via both fixed and mobile access networks. In this case the user terminal (desktop, lap-top, etc.) at a fixed user location (e.g. home, office) can access the broad- band service controlled by the IMT-2020 FMC network by simultaneously using fixed and mobile access, or only one access type at given time. The traffic policies and QoS should be supported simultaneously through both access network types, aiming to provide high user experience. Mobile access via both fixed and mobile access networks. In this case the mobile termi- nal (e.g. a smartphone) connects through fixed access (via WiFi as wireless LAN for the fixed access network) and/or mobile access network, again by using both access network types