The present document analyses the aspects with regard to the new interface between Control Plane and User Plane due to the separation of the following EPC nodes: S-GW, P-GW and TDF. Specifically, the following aspects are to be analysed:

• Restoration procedure enhancements for the separated nodes;
• Signalling with regards to Load control;
• Signalling with regards to Overload control;
• Path management and path failure handling.