stem2. We envision several options as follows: - The paging message may carry the slice information to indicate which network slice triggers the paging request. Then the UE can respond to the request if it camps on the cell that supports the corresponding RAN subsystem, or stores the remapping policies that allow the RAN subsystem to support the initiated network slice. The paging message may not carry the slice information. After the UE accesses the network, the CN may not initiate the PDU sessions for which the serving RAN node does not support the RAN subsystem. It may signal the RAN SO that the RAN may perform the redirection procedure toward this UE to the cell/frequency. Slice-aware access control: In order to ensure that the congestion of one slice does not adversely affect other slices, the RAN may perform slice-specific access control. Moreover, different RAN subsystems could be treated differently using the unified access barring mechanism applicable for all RRC states. Each UE can perform access control based on its associated RAN subsystems accordingly. Summary In this chapter, we present the general concept, principles, and deployment scenarios of service-oriented RAN slicing. The primary objective of service-oriented RAN slicing 12 Service-Oriented RAN Support of Network Slicing is a major enabler for mobile operators to support all potential of vertical services. Service-oriented RAN slicing provides the essential incentives to allow operators to provide tailored solutions to vertical service providers over the same network infrastructure, thus bringing new business models for mobile operators and vendors. We identify key enabling technologies to improve spectrum efficiency and meet different KPIs. We anticipate with well-developed standards, tight collaboration with operators, vendors, and vertical industries to provide a healthy 5G system via the introduced service-oriented RAN slicing. References 1 Popovski, P., Trillinsgaard, K.F., Simeone, O., and Durisi, G. (2018). 5G wireless network slicing