Apparatuses and methods for coordinating communication operations associated with a plurality of subscriber identity cards in a mobile communication device with a single wireless transceiver
A mobile communication device including a wireless transceiver and a wireless transceiver is provided. The wireless transceiver performs wireless transmission and reception to and from a first service network and a second service network. The controller uses a first subscriber identity card to establish one or more first radio bearers with the first service network via the wireless transceiver, uses a second subscriber identity card to set up an Internet Protocol Security (IPsec) tunnel with an evolved Packet Data Gateway (ePDG) of the second service network via the first radio bearers, and uses the second subscriber identity card to register an IP Multimedia Subsystem (IMS) service with the second service network via the IPsec tunnel.
1. A mobile communication device, comprising:
a wireless transceiver, configured to perform wireless transmission and reception to and from a first service network and a second service network; and
a controller, configured to use a first subscriber identity card to establish one or more first radio bearers with the first service network via the wireless transceiver, wherein when the one or more first radio bearers are established between the mobile communication device and the first service network, the mobile communication device is allowed to transmit one or more data packets to the first service network,
the controller being further configured to:
use a second subscriber identity card to set up an Internet Protocol Security (IPsec) tunnel with a non-3GPP access gateway of the second service network via the first radio bearers, and
use the second subscriber identity card to register an IP Multimedia Subsystem (IMS) service with the second service network via the IPsec tunnel.
2. The mobile communication device of claim 1 , wherein the non-3GPP access gateway includes an evolved Packet Data Gateway (ePDG).
3. The mobile communication device of claim 1 , wherein the controller is further configured to receive, via the IPsec tunnel, a Session Initiation Protocol (SIP) INVITE message indicating an IMS Mobile-Terminated (MT) call for the second subscriber identity card.
4. The mobile communication device of claim 3 , wherein the controller is further configured to receive the IMS MT call for the second subscriber identity card via the IPsec tunnel in response to receiving the SIP INVITE message.
5. The mobile communication device of claim 3 , wherein the controller is further configured to generate a notification of the IMS MT call for a user of the mobile communication device and reject the IMS MT call, in response to receiving the SIP INVITE message.
6. The mobile communication device of claim 3 , wherein the controller is further configured to use the second subscriber identity card to establish one or more second radio bearers with the second service network via the wireless transceiver, and receive the IMS MT call for the second subscriber identity card via the second radio bearers, in response to receiving the SIP INVITE message.
7. The mobile communication device of claim 3 , wherein the controller is further configured to search for the second service network via the wireless transceiver in response to receiving the SIP INVITE message.
8. The mobile communication device of claim 1 , wherein the controller is further configured to use the second subscriber identity card to make an IMS Mobile-Originated (MO) call via the IPsec tunnel in response to initiating the IMS MO call for the second subscriber identity card.
9. The mobile communication device of claim 1 , wherein the controller is further configured to use the second subscriber identity card to establish one or more second radio bearers with the second service network via the wireless transceiver, and use the second subscriber identity card to make an IMS Mobile-Originated (MO) call via the second radio bearers, in response to initiating the IMS MO call for the second subscriber identity card.
10. The mobile communication device of claim 1 , wherein the setup of the IPsec tunnel and the registration of the IMS service are performed when the wireless transceiver is unable to detect a coverage of the second service network using the second subscriber identity card.
11. A method for coordinating communication operations associated with a plurality of subscriber identity cards in a mobile communication device with a single wireless transceiver, comprising:
using a first subscriber identity card to establish one or more first radio bearers with a first service network via the single wireless transceiver, wherein when the one or more first radio bearers are established between the mobile communication device and the first service network, the mobile communication device is allowed to transmit one or more data packets to the first service network;
using a second subscriber identity card to set up an Internet Protocol Security (IPsec) tunnel with a non-3GPP access gateway of the second service network via the first radio bearers; and
using the second subscriber identity card to register an IP Multimedia Subsystem (IMS) service with the second service network via the IPsec tunnel.
12. The mobile communication device of claim 11 , wherein the non-3GPP access gateway includes an evolved Packet Data Gateway (ePDG).
13. The method of claim 11 , further comprising:
receiving, via the first radio bearers, a Session Initiation Protocol (SIP) INVITE message indicating an IMS Mobile-Terminated (MT) call for the second subscriber identity card.
14. The method of claim 13 , further comprising:
receiving the IMS MT call for the second subscriber identity card via the first radio bearers in response to receiving the SIP INVITE message.
15. The method of claim 13 , further comprising:
generating a notification of the IMS MT call for a user of the mobile communication device and reject the IMS MT call, in response to receiving the SIP INVITE message.
16. The method of claim 13 , further comprising:
in response to receiving the SIP INVITE message,
using the second subscriber identity card to establish one or more second radio bearers with the second service network via the single wireless transceiver; and
receiving the IMS MT call for the second subscriber identity card via the second radio bearers.
17. The method of claim 13 , further comprising:
searching for the second service network via the single wireless transceiver in response to receiving the SIP INVITE message.
18. The method of claim 11 , further comprising:
using the second subscriber identity card to make an IMS Mobile-Originated (MO) call via the first radio bearers in response to initiating the IMS MO call for the second subscriber identity card.
19. The method of claim 11 , further comprising:
in response to initiating an IMS Mobile-Originated (MO) call for the second subscriber identity card,
using the second subscriber identity card to establish one or more second radio bearers with the second service network via the single wireless transceiver; and
using the second subscriber identity card to make the IMS MO call via the second radio bearers.
20. The method of claim 11 , wherein the registration with the non-3GPP access gateway of the second service network using the second subscriber identity card is performed when the single wireless transceiver is unable to detect a coverage of the second service network.