Energy harvesting aware user equipment power state transition

An apparatus, comprising:

• at least one processor;
• and
• at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform
• sending an on-demand power state transition message to the user equipment;
• receiving a message indicating a power state transition of a user equipment based on an energy level of the user equipment, wherein the message indicating the power state transition indicates whether the user equipment is limited capability, reduced capability, or full capability, and is responsive to the on-demand power state transition message;
• adjusting scheduling of the user equipment in accordance with the power state transition;
• and
• sending paging or data to the user equipment in accordance with the adjusted scheduling.

A method, comprising:

• monitoring an energy level and power state of a user equipment;
• receiving an on-demand power state transition message from the network, wherein the power state transition message indicates whether the user equipment is limited capability, reduced capability, or full capability;
• determining whether the energy level satisfies a power state transition criterion, wherein the determining is based on the on-demand power state transition message;
• and
• transitioning from a first power state to a second power state based on the power state transition criterion being determined to be satisfied by the energy level of the user equipment.