Ntn-tn idle mode mobility for nw energy savings

A method for a wireless transmit receive unit (WTRU), the method comprising:

• receiving configuration information associated with non-terrestrial network (NTN) cells, wherein the configuration information indicates a first candidate NTN cell and a second candidate NTN cell, wherein the first candidate NTN cell is associated with a first orbit type and a first NTN power sharing status, and wherein the second candidate NTN cell is associated with a second cell orbit type and a second NTN power sharing status;
• receiving a first message that indicates to perform an NTN cell suitability determination associated with the first candidate NTN cell and the second candidate NTN cell;
• performing a measurement associated with the first candidate NTN cell and a measurement associated with the second candidate NTN cell;
• determining that the first candidate NTN cell satisfies suitability conditions based on the first NTN power sharing status, the first orbit type, and the measurement associated with the first candidate NTN cell, wherein satisfaction of the suitability conditions comprises satisfaction of:
• an NTN power sharing status condition, an orbit condition, and a measurement threshold condition;
• receiving a second message, wherein the second message is received from a terrestrial network (TN) cell, and wherein the second message indicates a shutdown associated with a first one or more TN cells;
• and
• excluding the first one or more TN cells associated with the shutdown as re-selection candidates based on the received second message.