Recommendation ITU-T Y.3112 describes the concept of network slicing and use cases of that a single user equipment (UE) attaches to multiple network slices simultaneously in the IMT-2020 network. The use cases introduce the slice service type for indicating a specific network slice and the slice user group for precisely representing the network slice in terms of performance aspects and business aspects. This Recommendation also specifies high-level requirements and framework for the support of network slicing in the IMT-2020 network.