Configuration enhancements on access point name (APN) or data network name (DNN) selection in user equipment (UE)

1. A User Equipment (UE), comprising:

a wireless transceiver, configured to perform wireless transmission and reception to and from a mobile communication network; and

a controller, coupled to the wireless transceiver, and configured to:

receive a message from the mobile communication network via the wireless transceiver, wherein the message comprises information for indicating an order and a priority of reading Access Point Name (APN) parameters or Data Network Name (DNN) parameters from a plurality of input sources, and wherein each input source comprises an APN value or a DNN value; and

based on the information, use the APN value or the DNN value to request establishment of a Packet Data Network (PDN) connection or a Protocol Data Unit (PDU) session with the mobile communication network via the wireless transceiver,

wherein the message comprises an IP Multimedia Subsystem (IMS) Management Object (MO), and the information is provided by an IMS configuration parameter in the IMS MO,

wherein the APN value or the DNN value is provided by a Universal Integrated Circuit Card (UICC) in the UE, by the mobile communication network, or by user via UE settings menu or any other method based on a value of the IMS configuration parameter in the IMS MO.

2. The UE as claimed in claim 1 , wherein the message is received via Open Mobile Alliance-Device Management (OMA-DM) signaling, HyperText Transfer Protocol (HTTP) signaling, Non-Access Stratum (NAS) signaling, or AS signaling.

3. The UE as claimed in claim 1 , wherein the APN value or the DNN value is provided by the UICC in the UE, when the IMS configuration parameter is set to a first value.

4. The UE as claimed in claim 3 , wherein the APN value or the DNN value is provided by an Elementary File (EF) for APN Control List (ACL) in the UICC.

5. The UE as claimed in claim 1 , wherein the APN value or the DNN value is provided by the mobile communication network, when the IMS configuration parameter is set to a second value.

6. The UE as claimed in claim 5 , wherein the APN value or the DNN value is provided by a Radio Resource Control (RRC) response message or a Short Message Service (SMS) message sent by the mobile communication network.

7. The UE as claimed in claim 1 , wherein the APN value or the DNN value is provided by the user via UE settings menu or any other method, when the IMS configuration parameter is set to a third value.

8. The UE as claimed in claim 1 , wherein the using of the APN value or the DNN value based on the information is performed in response to a boot-up of the UE or in response to a flight mode of the UE being turned on and off.

9. The UE as claimed in claim 1 , wherein the APN value or the DNN value is associated with an eXtensible Markup Language (XML) Configuration Access Protocol (XCAP) APN or DNN, a Multimedia Messaging Service (MMS) APN or DNN, or an IMS APN or DNN.

10. A method, comprising:

receiving a message from a mobile communication network by a User Equipment (UE), wherein the message comprises information for indicating an order and a priority of reading Access Point Name (APN) parameters or Data Network Name (DNN) parameters from a plurality of input sources, and wherein each input source comprises an APN value or a DNN value; and

based on the information, using the APN value or the DNN value to request establishment of a Packet Data Network (PDN) connection or a Protocol Data Unit (PDU) session with the mobile communication network,

wherein the message comprises an IP Multimedia Subsystem (IMS) Management Object (MO), and the information is provided by an IMS configuration parameter in the IMS MO,

wherein the APN value or the DNN value is provided by a Universal Integrated Circuit Card (UICC) in the UE, by the mobile communication network, or by user via UE settings menu or any other method based on a value of the IMS configuration parameter in the IMS MO.

11. The method as claimed in claim 10 , wherein the message is received via Open Mobile Alliance-Device Management (OMA-DM) signaling, HyperText Transfer Protocol (HTTP) signaling, Non-Access Stratum (NAS) signaling, or AS signaling.

12. The method as claimed in claim 10 , wherein the APN value or the DNN value is provided by the UICC in the UE, when the IMS configuration parameter is set to a first value.

13. The method as claimed in claim 12 , wherein the APN value or the DNN value is provided by an Elementary File (EF) for APN Control List (ACL) in the UICC.

14. The method as claimed in claim 10 , wherein the APN value or the DNN value is provided by the mobile communication network, when the IMS configuration parameter is set to a second value.

15. The method as claimed in claim 14 , wherein the APN value or the DNN value is provided by a Radio Resource Control (RRC) response message or a Short Message Service (SMS) message sent by the mobile communication network.

16. The method as claimed in claim 10 , wherein the APN value or the DNN value is provided by the user via UE settings menu or any other method, when the IMS configuration parameter is set to a third value.

17. The method as claimed in claim 10 , wherein the using of the APN value or the DNN value based on the information is performed in response to a boot-up of the UE or in response to a flight mode of the UE being turned on and off.

18. The method as claimed in claim 10 , wherein the APN value or the DNN value is associated with an eXtensible Markup Language (XML) Configuration Access Protocol (XCAP) APN or DNN, a Multimedia Messaging Service (MMS) APN or DNN, or an IMS APN or DNN.