Method and apparatus for receiving downlink data packets over N3GPP access

A user equipment (UE), the UE comprising:

• a transceiver;
• and
• a processor configured to:
• identify that the UE is in idle mode over non-3rd generation partnership project (non-3GPP) access and out of a service area of the non-3GPP access,
• transmit, to an access and mobility function (AMF), a first service request message over a 3GPP access,
• receive, from the AMF, a service reject message in response to the first service request message over the 3GPP access, the service reject message including first information for a T3346 timer,
• start the T3346 timer based on the first information for the T3346 timer,
• receive, from lower layers of the non-3GPP access, an indication indicating that an access stratum connection has been established between the UE and a network,
• identify that the T3346 timer is expired, and
• in response to initiating a service request procedure based on the UE being in idle mode but present in the service area of the non-3GPP access, the indication, and the T3346 timer being expired, transmit, to the AMF, a second service request message over the non-3GPP access,
• wherein the UE is registered with same public land mobile network (PLMN) over both the 3GPP access and the non-3GPP access, the T3346 timer is applied to both the 3GPP access and the non-3GPP access.