stantiation of AMFs could be boosted close to highways and urban areas to accommodate high vehicle density at peak hours, and it could be flexibly scaled down at off-peak hours to avoid over-provisioning. A lighter AMF deployment could be used, instead, in rural areas. Moreover, AMF functions can be co-located with the eNodeB to ensure low-latency signal- ing procedures, e.g. for autonomous driving use cases. 13 5G Network Slicing for V2X Communications: Technologies and Enablers 13.7.4 Transparent Mobility The high vehicle speed requires frequent interactions with the network to manage mobil- ity procedures affecting both UP and CP operations. Mobility poses serious issues to the run-time configuration of a slice. Quick path resource allocation algorithms in the back- haul/fronthaul segments should be designed, which allow to allocate/migrate resources in another area while reducing disruption periods. The effective and efficient instantiation of a sort of moving slice entails proper mobility prediction modules to trigger slice reconfig- uration, while also pre-fetching UP functions close to vehicles. With the introduction of MEC platforms, live migration, and service redirection are necessary actions that increase the complexity of mobility management and handover procedures. 13.7.5 Isolation The network operator should carefully prevent an abnormal situation in other applications from negatively affecting the QoS of V2X safety applications. 3GPP partially targets this issue by suggesting the allocation of a dedicated spectrum for V2V communications over the PC5 interface. The isolation of the V2X slices from other network slices must be also supported. Limiting the number of shared CP/UP functionalities, proper scheduling algo- rithms over the RAN and SDN-configured paths would contribute to achieving the required degree of isolation. 13.8 Conclusions This chapter presented the main technology enablers and design principles of 5G network slicing for the challenging and promising automotive market. Particular a