Multi-USIM operation in user equipment
The disclosure relates to 5th generation (5G) and/or 6th generation (6G) communication system for supporting a higher data transmission rate. A method is provided of operating a user equipment (UE) with multi universal subscriber identity module (M-USIM) capability in a wireless communication system. The method includes performing a registration procedure with respect to a connected telecommunication network if the UE is in a non-allowed area and encounters or receives a trigger for a network access stratum (NAS) procedure related to an M-USIM feature.
1 . A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
identifying that a mobility management back off (BO) timer is running;
identifying that the UE supporting a multi-universal subscriber identity module (MUSIM) is in an evolved packet system (EPS) mobility management (EMM)-connected mode or a fifth generation system (5GS) mobility management (5GMM)-connected mode, and the UE is to transmit a first non-access stratum (NAS) message; and
starting a first service request procedure to transmit the first NAS message for requesting a network entity for managing mobility to release a connection while the mobility management BO timer is running.
2 . The method of claim 1 , further comprising:
identifying that a service gap control (SGC) timer is running;
identifying that the UE supporting the MUSIM is in the EMM-connected mode, and the UE is to transmit a second NAS message to the network entity; and
starting a second service request procedure to transmit the second NAS message to the network entity while the SGC timer is running.
3 . The method of claim 1 , further comprising:
identifying that a service gap control (SGC) timer is running;
identifying that the UE supporting the MUSIM is in the 5GMM-connected mode with a radio resource control (RRC) inactive indication, and the UE is to transmit a second NAS message to the network entity; and
starting a second service request procedure to transmit the second NAS message to the network entity while the SGC timer is running.
4 . The method of claim 1 , further comprising:
receiving, from the network entity via a base station, service area restriction information including information on a non-allowed area; and
transmitting, to the network entity via the base station, a registration request for removing a paging restriction, based on removal of the paging restriction being required while the UE supporting the MUSIM is in a state in which a cell the UE camps on is in the non-allowed area.
5 . A user equipment (UE) in a wireless communication system, the UE comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
identify that a mobility management back off (BO) timer is running,
identify that the UE supporting a multi-universal subscriber identity module (MUSIM) is in an evolved packet system (EPS) mobility management (EMM)-connected mode or a fifth generation system (5GS) mobility management (5GMM)-connected mode, and the UE is to transmit a first non-access stratum (NAS) message, and
start a first service request procedure to transmit the first NAS message for requesting a network entity for managing mobility to release a connection while the mobility management BO timer is running.
6 . The UE of claim 5 , wherein the controller is further configured to:
identify that a service gap control (SGC) timer is running,
identify that the UE supporting the MUSIM is in the EMM-connected mode, and the UE is to transmit a second NAS message to the network entity, and
start a second service request procedure to transmit the second NAS message to the network entity while the SGC timer is running.
7 . The UE of claim 5 , wherein the controller is further configured to:
identify that a service gap control (SGC) timer is running,
identify that the UE supporting the MUSIM is in the 5GMM-connected mode with a radio resource control (RRC) inactive indication, and the UE is to transmit a second NAS message to the network entity, and
start a second service request procedure to transmit the second NAS message to the network entity while the SGC timer is running.
8 . The UE of claim 5 , wherein the controller is further configured to:
receive, from the network entity via a base station, service area restriction information including information on a non-allowed area, and
transmit, to the network entity via the base station, a registration request for removing a paging restriction, based on removal of the paging restriction being required while the UE supporting the MUSIM is in a state in which a cell the UE camps on is in the non-allowed area.
9 . A method performed by a network entity for managing mobility in a wireless communication system, the method comprising:
receiving, from a user equipment (UE) while a mobility management back off (BO) timer is running, a first non-access stratum (NAS) message associated with a first service request procedure for a release of a connection, based on the UE supporting a multi-universal subscriber identity module (MUSIM) being in an evolved packet system (EPS) mobility management (EMM)-connected mode or a fifth generation system (5GS) mobility management (5GMM)-connected mode; and
transmitting a message as a response to the first NAS message.
10 . The method of claim 9 , wherein a second service request procedure starts while a service gap control (SGC) timer is running, based on a second NAS message associated with the second service request procedure being received from the UE, and based on the UE supporting the MUSIM being in the EMM-connected mode.
11 . The method of claim 9 , wherein a second service request procedure starts while a service gap control (SGC) timer is running, based on a second NAS message associated with the second service request procedure being received from the UE, and based on the UE supporting the MUSIM being in the 5GMM-connected mode with a radio resource control (RRC) inactive indication.
12 . The method of claim 9 , further comprising:
transmitting, to the UE via a base station, service area restriction information including information on a non-allowed area; and
receiving, from the UE via the base station, a registration request for removing a paging restriction, based on removal of the paging restriction being required while the UE supporting the MUSIM is in a state in which a cell the UE camps on is in the non-allowed area.
13 . A network entity for managing mobility in a wireless communication system, the network entity comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
receive, from a user equipment (UE) while a mobility management back off (BO) timer is running, a first non-access stratum (NAS) message associated with a first service request procedure for a release of a connection, based on the UE supporting a multi-universal subscriber identity module (MUSIM) being in an evolved packet system (EPS) mobility management (EMM)-connected mode or a fifth generation system (5GS) mobility management (5GMM)-connected mode, and
transmit a message as a response to the first NAS message.
14 . The network entity of claim 13 , wherein a second service request procedure starts while a service gap control (SGC) timer is running, based on a second NAS message associated with the second service request procedure being received from the UE, and based on the UE supporting the MUSIM being in the EMM-connected mode.
15 . The network entity of claim 13 , wherein a second service request procedure starts while a service gap control (SGC) timer is running, based on a second NAS message associated with the second service request procedure being received from the UE, and based on the UE supporting the MUSIM being in the 5GMM-connected mode with a radio resource control (RRC) inactive indication.
16 . The network entity of claim 13 , wherein the controller is further configured to:
transmit, to the UE via a base station, service area restriction information including information on a non-allowed area, and
receive, from the UE via the base station, a registration request for removing a paging restriction, based on removal of the paging restriction being required while the UE supporting the MUSIM is in a state in which a cell the UE camps on is in the non-allowed area.