Method and apparatus for indicating MT-service for multi-SIM UE

1. A method performed by an access and mobility function (AMF) entity in a wireless communication system, the method comprising:

performing with a multi-subscriber identity module (SIM) user equipment (UE), a first registration procedure associated with registering a first SIM of the multi-SIM UE;

receiving, from the multi-SIM UE, a second registration request message associated with registering a second SIM of the multi-SIM UE, wherein the second registration request message includes a globally unique temporary identifier (GUTI) allocated to the first SIM via the first registration procedure; and

transmitting, to the multi-SIM UE, information indicating that a first context of the first SIM and a second context of the second SIM are stored in the same AMF entity,

wherein the information indicating that the first context and the second context are stored in the same AMF entity is associated with not monitoring a paging channel in case that one of the first SIM and the second SIM is in a connected state.

2. The method of claim 1 , further comprising:

in case that the first SIM is in the connected state, transmitting, to the multi-SIM UE, a non-access stratum (NAS) message over a connection of the first SIM, wherein the NAS message includes a paging cause parameter associated with the second SIM.

3. The method of claim 2 , wherein the paging cause parameter is associated with determining whether the multi-SIM UE is able to respond to the NAS message.

4. The method of claim 3 , in response to the NAS message, receiving, from the multi-SIM UE, a NAS response message indicating that the multi-SIM UE is not able to respond to the NAS message.

5. A method performed by a multi-subscriber identity module (SIM) user equipment (UE) in a wireless communication system, the method comprising:

performing, with an access and mobility function (AMF) entity, a first registration procedure associated with registering a first SIM of the multi-SIM UE;

transmitting, to the AMF entity, a second registration request message associated with registering a second SIM of the multi-SIM UE, wherein the second registration request message includes a globally unique temporary identifier (GUTI) allocated to the first SIM via the first registration procedure; and

receiving, from the AMF entity, information indicating that a first context of the first SIM and a second context of the second SIM are stored in the same AMF entity,

wherein based on the information indicating that the first context and the second context are stored in the same AMF entity, a paging channel is not monitored in case that one of the first SIM and the second SIM is in a connected state.

6. The method of claim 5 , further comprising:

in case that the first SIM is in the connected state, receiving, from the AMF entity, a non-access stratum (NAS) message over a connection of the first SIM, wherein the NAS message includes a paging cause parameter associated with the second SIM.

7. The method of claim 6 , further comprising:

determining whether the multi-SIM UE is able to respond to the NAS message, based on the paging cause parameter.

8. The method of claim 7 , further comprising:

transmitting, to the AMF entity, a NAS response message indicating that the multi-SIM UE is not able to respond to the NAS message.

9. An access and mobility function (AMF) entity in a wireless communication system, the AMF entity comprising:

a transceiver; and

at least one processor coupled with the transceiver and configured to:

perform with a multi-subscriber identity module (SIM) user equipment (UE) via the transceiver, a first registration procedure associated with registering a first SIM of the multi-SIM UE;

receive, from the multi-SIM UE via the transceiver, a second registration request message associated with registering a second SIM of the multi-SIM UE, wherein the second registration request message includes a globally unique temporary identifier (GUTI) allocated to the first SIM via the first registration procedure; and

transmit, to the multi-SIM UE via the transceiver, information indicating that a first context of the first SIM and a second context of the second SIM are stored in the same AMF entity,

wherein the information indicating that the first context and the second context are stored in the same AMF entity is associated with not monitoring a paging channel in case that one of the first SIM and the second SIM is in a connected state.

10. A multi-subscriber identity module (SIM) user equipment (UE) in a wireless communication system, the multi-SIM UE comprising:

a transceiver; and

at least one processor coupled with the transceiver and configured to:

perform with an access and mobility function (AMF) entity via the transceiver, a first registration procedure associated with registering a first SIM of the multi-SIM UE;

transmit, to the AMF entity via the transceiver, a second registration request message associated with registering a second SIM of the multi-SIM UE, wherein the second registration request message includes a globally unique temporary identifier (GUTI) allocated to the first SIM via the first registration procedure; and

receive, from the AMF entity via the transceiver, information indicating that a first context of the first SIM and a second context of the second SIM are stored in the same AMF entity,

wherein based on the information indicating that the first context and the second context are stored in the same AMF entity, a paging channel is not monitored in case that one of the first SIM and the second SIM is in a connected state.