Method and device for transmitting data and storage medium thereof

A third network entity in a wireless communication system, the third network entity comprising:

• a transceiver;
• and
• at least one processor configured to:
• control the transceiver to receive, from a first network entity, a notification indicating that downlink data to be transmitted to a User Equipment (UE) in a non-connected state is buffered on the first network entity, and
• control the transceiver to transmit, to a second network entity, a message comprising an information indicating that the downlink data has been buffered on the first network entity.

A second network entity in a wireless communication system, the second network entity comprising:

• a transceiver;
• and
• at least one processor configured to:
• control the transceiver to receive, from a third network entity, a message comprising an information indicating that downlink data to be transmitted to a User Equipment (UE) in a non-connected state is buffered by a first network entity, and
• determine, based on the message, not to initiate a paging procedure for the UE in the non-connected state.