Apparatus, system, method, and computer-readable medium for cellular system enhancements for the support of multi-SIM user equipments
An electronic device including a receiver configured to receive a first Subscriber Identity Module (SIM); a receiver configured to receive a second SIM; and circuitry configured to receive data from the first SIM; and send a request, to a first public land mobile network (PLMN), to register the electronic device to the first PLMN, wherein the request indicates that the electronic device is a multi-SIM device and the request includes multi-SIM assistance information, and wherein the multi-SIM assistance information informs the first PLMN of the electronic device's preference for multi-SIM operations.
1 . An electronic device configured to receive a first subscriber identity module (SIM) associated with a first network and a second SIM associated with a second network, the electronic device comprising:
a transceiver, memory, and a processor which are configured to:
send a first registration request to the first network to register the electronic device, wherein the first registration request indicates that the electronic device is a multi-SIM device, the first registration request comprises a subscriber identifier that is associated with the first network, and the first registration request comprises a multi-SIM policy, wherein the multi-SIM policy informs the first network of capabilities of the electronic device for multi-SIM operations,
receive a page from the second network and, based on receiving the page from the second network, determine to switch to the second network,
send a second registration request to the first network, wherein the second registration request indicates the determination to switch to the second network, and
transition to a CM-IDLE state and an RRC_IDLE state in the first network.
2 . The electronic device of claim 1 , wherein the multi-SIM policy comprises one or more of:
an indication that the electronic device is capable of sending service prioritization information wherein service prioritization information may be used by the first network to determine whether to send a paging message to the electronic device,
an indication that the electronic device is capable of receiving service type information in the paging message, or
an indication that the electronic device is capable of providing identifiers that may be used to determine paging occasions.
3 . The electronic device of claim 1 , wherein the transceiver, memory, and the processor are configured to:
receive, in response to the first registration request, information that configures the electronic device for multi-SIM operations, the information comprising one or more of:
an indication that the first network is capable of receiving service prioritization information wherein service prioritization information may be used by the first network to determine whether to send a paging message to the electronic device,
an indication that the first network is capable of sending service type information in a paging message to the electronic device, or
an indication that the first network supports sending identifiers that may be used to determine paging occasions.
4 . The electronic device of claim 1 , wherein the second registration request is a registration update request that indicates to the first network that the electronic device will connect to the second network.
5 . The electronic device of claim 4 , wherein the registration update request comprises service prioritization information to request that a core network of the first network filter paging requests for the electronic device.
6 . The electronic device of claim 1 , wherein the transceiver, memory, and the processor are configured to receive a paging message from the first network, wherein the paging message comprises service type information that indicates what the paging message is for.
7 . The electronic device of claim 6 , wherein the service type information comprises one of voice call, SMS message, other data, control plane signaling, emergency messages, emergency callback, or mobile terminated exception data.
8 . The electronic device of claim 1 , wherein the transceiver, memory, and the processor are configured to:
receive a paging message from the first network; and
in response to the received paging message, send a third request to the first network wherein the third request comprises an indication that the electronic device is busy.
9 . The electronic device of claim 8 , wherein the third request that indicates that the electronic device is busy comprises service prioritization information to inform a core network of the first network to filter paging requests for the electronic device.
10 . The electronic device of claim 1 , wherein the transceiver, memory, and the processor are configured to:
send a third request to the first network to update an identifier for calculating paging occasions associated with the first network,
receive a response from the first network, the received response including an updated identifier, and
calculate a paging occasion associated with the first network using the updated identifier.
11 . The electronic device of claim 10 , wherein the third request to the first network to update the identifier comprises a value used by a network function to determine the updated identifier.
12 . The electronic device of claim 1 , wherein the electronic device is a user equipment (UE).
13 . A method implementer by an electronic device configured to receive a first subscriber identity module (SIM) associated with a first network and a second SIM associated with a second network, the method comprising:
sending a first registration request to the first network to register the electronic device, wherein the first registration request indicates that the electronic device is a multi-SIM device, the first registration request comprises a subscriber identifier that is associated with the first network, and the first registration request comprises a multi-SIM policy, wherein the multi-SIM policy informs the first network of capabilities of the electronic device for multi-SIM operations;
receiving a page from the second network and, based on receiving the page from the second network, determining to switch to the second network;
send a second registration request to the first network, wherein the second registration request indicates the electronic device is switching to the second network; and
transitioning to a CM-IDLE state and an RRC_IDLE state in the first network.
14 . The method of claim 13 , wherein the multi-SIM policy comprises one or more of:
an indication that the electronic device is capable of sending service prioritization information wherein service prioritization information may be used by the first network to determine whether to send a paging message to the electronic device,
an indication that the electronic device is capable of receiving service type information in the paging message, or
an indication that the electronic device is capable of providing identifiers that may be used to determine paging occasions.
15 . The method of claim 13 , further comprising:
receiving, in response to the first registration request, information that configures the electronic device for multi-SIM operations, the information comprising one or more of:
an indication that the first network is capable of receiving service prioritization information wherein service prioritization information may be used by the first network to determine whether to send a paging message to the electronic device,
an indication that the first network is capable of sending service type information in a paging message to the electronic device, or
an indication that the first network supports sending identifiers that may be used to determine paging occasions.
16 . The method of claim 13 , wherein the second registration request is a registration update request that indicates to the first network that the electronic device will connect to the second network.
17 . The method of claim 16 , wherein the registration update request comprises service prioritization information to request that a core network of the first network filter paging requests for the electronic device.
18 . The method of claim 16 , further comprising:
receiving a paging message from the first network, wherein the paging message comprises service type information that indicates what the paging message is for.
19 . The method of claim 18 , wherein the service type information comprises one of voice call, SMS message, other data, control plane signaling, emergency messages, emergency callback, or mobile terminated exception data.
20 . The method of claim 13 , further comprising:
receiving a paging message from the first network; and
in response to the received paging message, sending a third request to the first network wherein the third request comprises an indication that the electronic device is busy.
21 . The method of claim 20 , wherein the third request that indicates that the electronic device is busy comprises service prioritization information to inform a core network of the first network to filter paging requests for the electronic device.
22 . The method of claim 13 , further comprising:
sending a third request to the first network to update an identifier for calculating paging occasions associated with the first network;
receiving a response from the first network, the received response including an updated identifier; and
calculating a paging occasion associated with the first network using the updated identifier.
23 . The method of claim 22 , wherein the third request to the first network to update the identifier comprises a value used by a network function to determine the updated identifier.