SYSTEM AND METHOD FOR RECEIVING CALL IN WIRELESS TERMINAL

• US 20130065570A1
• Filed: 09/07/2012
• Published: 03/14/2013
• Est. Priority Date: 09/08/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: JUNG, In-Hyung, JUNG, Hee-Jung
• Granted Patent: US 9,185,547 B2
• Time in Patent Office: Days
• US Class Current: 455/417
• CPC Class Codes: H04W 4/16 Communication-related supplementary services, e.g. call-transfer or call-hold
• CPC Class Codes: H04W 4/60 Subscription-based services using application servers or record carriers, e.g. SIM application toolkits
• CPC Class Codes: H04W 68/005 Transmission of information for alerting of incoming communication
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections
• CPC Class Codes: H04W 8/205 Transfer to or from user equipment or user record carrier

Abstract

A system and method for receiving a call in a wireless terminal having a single Radio Frequency (RF) unit and at least two Subscriber Identity Module (SIM) cards, wherein the system includes: the wireless terminal for informing a user of occurrence of an incoming call through a second SIM card for which an incoming call forwarding is pre-registered while performing a call through a first SIM card; a Base Station (BS) related to the first SIM card for informing the wireless terminal of the occurrence of the incoming call through the second SIM card, in response to a paging request for the second SIM card that is received from a BS related to the second SIM card; and the BS related to the second SIM card for requesting the BS related to the first SIM card for paging to the second SIM card if a call request to the second SIM card for which the incoming call forwarding is registered is received.

Claims

1. A system for receiving a call in a wireless terminal having a single Radio Frequency (RF) unit and at least a first Subscriber Identity Module (SIM) card and a second Subscriber Identity Module (SIM), comprising:

the wireless terminal for informing an incoming call through the second SIM card for which an incoming call forwarding is registered while the wireless terminal is performing a call connection through the first SIM card;

a Base Station (BS) related to the first SIM card for informing the wireless terminal of the incoming call in response to a paging request for the second SIM card that is received from a BS related to the second SIM card; and

the BS related to the second SIM card for requesting the BS related to the first SIM card for paging to the second SIM card when a call request to the second SIM card is received.

2. The system of claim 1, wherein, if a call is requested in a state where the first SIM card is activated, the wireless terminal requests the BS related to the first SIM card for the call and simultaneously requests the BS related to the second SIM card for registration of the incoming call forwarding, and if the incoming call through the second SIM card is received from the BS related to the second SIM card while the wireless terminal is performing the call connection to the second terminal via the BS related to the first SIM card, the wireless terminal informs the incoming call through the second SIM card to a user.

3. The system of claim 1, wherein, if the incoming call through the second SIM card is established while the wireless terminal is performing the call connection to the second terminal through the first SIM card, the wireless terminal holds off the call connection through the first SIM card and transmits a voice signal received from the BS related to the second SIM card from the first terminal by the BS related to the first SIM card to the wireless terminal.

4. The system of claim 1, wherein the wireless terminal transmits Call Forwarding Unconditional (CFU) information in which information regarding the first SIM card is included and a CFU registration request message to the BS related to the second SIM card in order to register the incoming call forwarding to the second SIM card.

5. The system of claim 1, wherein, if all the calls ends, the wireless terminal transmits, to the BS related to the second SIM card, an incoming call forwarding registration release request message for requesting to release the incoming call forwarding registration to the second SIM card.

6. The system of claim 1, wherein, if CFU information and a CFU registration request message is received from the wireless terminal in order to register the incoming call forwarding to the second SIM card, the BS related to the second SIM card registers the CFU information for the second SIM card,

if a call request to the second SIM card is received, the BS related to the second SIM card requests the BS related to the first SIM card for paging to the second SIM card using information regarding the first SIM card included in the CFU information, and

if an incoming call forwarding registration release request message for requesting to release the incoming call forwarding registration to the second SIM card is received from the wireless terminal, the BS related to the second SIM card releases CFU registration for the second SIM card.

7. The system of claim 1, wherein, if a call request through the second SIM card is received from the first terminal while the wireless terminal is performing a call with the second terminal through the first SIM card, the BS related to the first SIM card transmits a voice signal received from the BS related to the second SIM card to the wireless terminal.

8. A method of receiving a call in a wireless terminal including a single Radio Frequency (RF) unit and at least two Subscriber Identity Module (SIM) cards, comprising:

if a call request to a second SIM card for which an incoming call forwarding is registered is received to a Base Station (BS) related to the second SIM card while the wireless terminal is performing a call through a first SIM card, requesting, by the BS related to the second SIM card, a BS related to the first SIM card for paging to the second SIM card; and

if the paging is received from the BS related to the first SIM card, informing, by the wireless terminal, an incoming call through the second SIM card while performing the call through the first SIM card.

9. The method of claim 8, wherein the requesting for paging to the second SIM card comprises:

if a call is requested in a state where the first SIM card is activated, requesting, by the wireless terminal, the BS related to the first SIM card for the call and simultaneously requesting the BS related to the second SIM card for registration of incoming call forwarding;

registering, by the BS related to the second SIM card, the incoming call forwarding to the second SIM card; and

if a call request to the second SIM card is received, requesting, by the BS related to the second SIM card, the BS related to the first SIM card for paging to the second SIM card based on the registration of the incoming call forwarding to the second SIM card.

10. The method of claim 9, further comprising transmitting, by the wireless terminal, Call Forwarding Unconditional (CFU) information in which information regarding the first SIM card is included and a CFU registration request message to the BS related to the second SIM card in order to register the incoming call forwarding to the second SIM card.

11. The method of claim 9, wherein, if the call request to the second SIM card is received, extracting, by the BS related to the second SIM card, information regarding the first SIM card from CFU information registered for the incoming call forwarding to the second SIM card;

and

requesting the BS related to the first SIM card for paging to the second SIM card based on the extracted information regarding the first SIM card.

12. The method of claim 8, wherein the informing the incoming call through the second SIM card comprises, if a paging request for the second SIM card is received from the BS related to the second SIM card, informing, by the BS related to the first SIM card, the wireless terminal performing the call of the incoming call through the second SIM card.

13. The method of claim 8, further comprising, if a call through the second SIM card is selected when the incoming call through the second SIM card occurs while the wireless terminal is performing a call through the first SIM card, holding off, by the wireless terminal, the call through the first SIM card and transmits a voice signal received from the BS related to the second SIM card by the BS related to the first SIM card to the wireless terminal.

14. The method of claim 13, further comprising, if the call through the second SIM card through which the incoming call occurs while the wireless terminal is performing the call through the first SIM card, transmitting, by the BS related to the first SIM card, a voice signal received from the BS related to the second SIM card to the wireless terminal.

15. The method of claim 8, further comprising:

if the call ends in the wireless terminal, transmitting, by the wireless terminal, an incoming call forwarding registration release request message to the BS related to the second SIM card; and

if the incoming call forwarding registration release request message is received from the wireless terminal, releasing, by the BS related to the second SIM card, the registration of the incoming call forwarding to the second SIM card.

16. A terminal for processing a call, comprising:

a single Radio Frequency (RF) unit for receiving an incoming call;

a first Subscriber Identity Module (SIM) card and a second Subscriber Identity Module (SIM) card; and

a controller for establishing a call connection to a first terminal in communication with a first base station via the first SIM card and for transmitting an incoming call forwarding pre-registration to a second base station in communication with a second terminal,

wherein upon receiving an incoming call request from the second terminal through the second SIM card, the second base station extracts information regarding the first SIM card from the pre-registration and requests a paging the first base station to request the first base station to inform the first wireless terminal of the incoming call request, and thereafter the first base station holds the communication with the first terminal and forwards a voice signal of the second terminal received from the second base station to the first wireless terminal.

17. The terminal of claim 16, wherein the controller transmits Call Forwarding Unconditional (CFU) information containing information of the first SIM card and a CFU registration request message to the second base station.

18. The terminal of claim 16, wherein the controller transmits an incoming call forwarding registration release request message to the second base station when a call connection to the second terminal ends.