signaling. To allow customized architecture and protocols in connecting devices of different service providers, different logical dedicated networks should be provided upon a common 3GPP infrastructure via network slicing for the efficient connection of different services. To achieve this, the architecture and protocols for different slices should be allowed to be customized and designed differently upon a common 3GPP infrastructure, e.g. the slice-specific protocol layer, and protocol functionalities are customized to adapt to the slice-oriented services. Detailed objectives of the work items are as follows: Device awareness of RAN part of network slice: - Detection of the availability of the corresponding service: it aims to solve the problems of (i) how NG-RAN/CN notifies UEs that services related to the RAN part of network slice are supported in related NG-RAN cells, and (ii) how UEs notify NG-RAN/CN that services related to the RAN part of network slice are requested by the UEs. - Support of service-specific connectivity control and service continuity in mobility: it aims to solve the problem of how the service continuity can be guaranteed when the UE moves to areas that do not support the connected RAN subsystem, and it can be guaranteed more easily when the UE moves within areas where the connected RAN subsystem is supported. Slice-specific RAN part of network slice, e.g.: - PHY/MAC configuration, access control, and mobility: it aims to achieve the goal that PHY/MAC parameters and resources can be configured and scheduled differently and flexibly in UE or NG-RAN for different slice-specific services during the UE access and mobility procedures, for example, different datalink protocols or PHY parameters such as transmission time interval (TTI) numerology can be configured differently for different services supported by eMBB, URLLC, and mMTC slices. - Network topology and air interface protocol adaptation: it aims to achieve the goals that (i) the NG-RAN may configure and support service-oriented network t