Methods and systems for performing paging operations in a 5G network

A User Equipment (UE) in a wireless communication system, the UE comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to:
• receive, from an Access and Mobility Function (AMF), a notification message through a Non-3rd Generation Partnership Project (N3GPP) access network, when the UE is in a CONNECTED mode over the N3GPP access network and in an IDLE mode over a 3GPP access network;
• and
• transmit a notification response message to the AMF through the N3GPP access network in response to the notification message, when the UE is out of coverage in the 3GPP access network, wherein the notification response message indicates inability of the UE to transmit a service request message to the AMF through the 3GPP access network in response to the notification message.

An Access and Mobility Function (AMF) in a wireless communication system, the AMF comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to:
• transmit a notification message to a User Equipment (UE) through a Non-3rd Generation Partnership Project (N3GPP) access network, when the UE is in a CONNECTED mode over the N3GPP access network and in an IDLE mode over a 3GPP access network;
• and
• receive a notification response message from the UE through the N3GPP access network, when the UE is out of coverage in the 3GPP access network, wherein the notification response message indicates inability of the UE to transmit a service request message to the AMF through the 3GPP access network in response to the notification message.