The following aspects are concluded as principles for the normative work:
It is agreed to support MT data signalling handling in CN when the UE is unreachable due to long extended DRX in RRC inactive.
When the gNB sends an indication to the CN and provides unreachability information (e.g., eDRX values negotiated between UE and gNB for RRC_INACTIVE state), the CN applies the HLcom functionality based on gNB provided unreachability information (as described in solution #6).
If the gNB has indicated the UE has entered RRC_INACTIVE to the CN, the gNB also notifies the CN about the RRC State transition back to RRC_CONNECTED (as described in solution #6).