Method for placing call in voice call continuity and terminal and server thereof

Abstract

A method, server and terminal for providing a Voice Call Continuity (VCC) service, are discussed. According to an embodiment, the terminal includes a storage unit to store operator policy information and user preference information, the user preference information including domain selection information specifying a user-preferred domain to be used when originating the outgoing call from the terminal, the operator policy information including domain selection information specifying a network-preferred domain to be used when originating the outgoing call from the terminal; and a controller to perform a domain selection for the outgoing call based on the user preference information or the operator policy information.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention.

FIG. 1 is a view illustrating architecture of a network for providing a VCC service, in which the present invention can be implemented.

FIG. 2 is a view illustrating a signal path of an outgoing call over a CS domain in a VCC service according to the background art.

FIG. 3 is a view illustrating a signal path of an outgoing call over an IMS domain in a VCC service according to the background art.

FIG. 4 is a view illustrating a signal path of an incoming call over a CS domain in a VCC service according to the background art.

FIG. 5 is a view illustrating a signal path of an incoming call over an IMS domain in a VCC service according to the background art.

FIG. 6 is a signal flowchart illustrating different methods for storing user preferences in a network in accordance with one embodiment of the present invention.

FIG. 7 is a signal flowchart illustrating a method for transmitting operator policy for outgoing calls to a UE in accordance with one embodiment of the present invention.

FIG. 8 is a signal flowchart illustrating a procedure of placing incoming calls after selecting a domain in accordance with one embodiment of the present invention.

FIG. 9 is a block diagram of a terminal in which the present invention is implemented.

Claims

1. A method for providing an incoming call directed to a terminal in a voice call continuity (VCC) service, the method comprising: performing, by the VCC application server, a domain selection for the incoming call based on first domain selection information or second domain selection information; andtransmitting, by the VCC application server, the incoming call over the selected domain selection.

2. The method of claim 1, further comprise: receiving, by the VCC application server, the first domain selection information from the terminal for storage in the VCC application server; andstoring, in a VCC application server, the received first domain selection information.

3. The method of claim 2, wherein the receiving step includes: transmitting, by the VCC application server, the ACK message to the terminal after receiving, by the VCC application server, the first domain selection information from the VCC application server.

4. The method of claim 2, wherein the first domain selection information is transmitted from the terminal to the VCC application server through V3 interface.

5. The method of claim 4, wherein the V3 interface is a Ut interface.

6. The method of claim 1, wherein the first domain selection information is user preferences, the user preferences including domain selection information specifying a user-preferred domain to be used when transmitting the incoming call to the terminal, and the second domain selection information is operator policy, the operator policy including domain selection information specifying a network-preferred domain to be used when transmitting the incoming call to the terminal

7. The method of claim 1, wherein the performing step is implemented by a Domain Selection Function of the VCC application server.

8. The method of claim 2, wherein the first domain selection information received by the VCC application server is initially input by a user at the terminal side.

9. The method of claim 1, in case the first domain selection information has higher priority than the second domain selection information, wherein the performing step includes: selecting, the VCC application server, one of a circuit-switched (CS) domain and an IP multimedia subsystem (IMS) domain for the incoming call based on the first domain selection information.

10. The method of claim 1, in case the second domain selection information has higher priority than the first domain selection information, wherein the performing step includes: selecting, the VCC application server, one of a circuit-switched (CS) domain and an IP multimedia subsystem (IMS) domain for the incoming call based on the second domain selection information.

11. The method of claim 2, wherein the storing step includes: setting, by a user, the first domain selection information in the VCC application server, by using a device other than the terminal, for storage in the VCC application server.

12. The method of claim 11, further comprising: transmitting the first domain selection information from the VCC application server to the terminal for storage in the terminal.

13. The method of claim 11, wherein the transmitting step is performed using a V3 interface.

14. The method of claim 2, wherein the storing step includes: receiving, by the VCC application server, a query regarding a user's preference of a domain from the terminal; andretrieving, by the VCC application server, the first domain selection information for storage in the VCC application server in response to the received query.

15. The method of claim 14, further comprising: transmitting the retrieved first domain selection information from the VCC application server to the terminal for storage in the terminal.

16. A method for providing an outgoing call originating from a terminal subscribed to a voice call continuity (VCC) service, the method comprising: receiving, by the terminal, second domain selection information from the VCC application server for storage in the terminal;performing, by the terminal, a domain selection for the outgoing call based on first domain selection information or the second domain selection information; andtransmitting, by the terminal, the outgoing call over the selected domain selection.

17. The method of claim 16, further comprise: storing, in the terminal, the second domain selection information received from the VCC application server.

18. The method of claim 16, in case the first domain selection information has higher priority than the second domain selection information, wherein the performing step includes: selecting, by the terminal, one of a circuit-switched (CS) domain and an IP multimedia subsystem (IMS) domain for the outgoing call based on the first domain selection information.

19. The method of claim 16, in case the second domain selection information has higher priority than the first domain selection information, wherein the performing step includes: selecting, by the terminal, one of a circuit-switched (CS) domain and an IP multimedia subsystem (IMS) domain for the outgoing call based on the second domain selection information.

20. The method of claim 16, wherein the first domain selection information is user preferences, the user preferences including domain selection information specifying a user-preferred domain to be used when transmitting the incoming call to the terminal, and the second domain selection information is operator policy, the operator policy including domain selection information specifying a network-preferred domain to be used when transmitting the incoming call to the terminal.

21. The method of claim 16, wherein the second domain selection information is transmitted from the VCC application server to the terminal through V3 interface.

22. The method of claim 21, wherein the V3 interface is a Ut interface.

23. The method of claim 16, wherein the receiving step includes: transmitting, by the terminal, the ACK message to the VCC application server after receiving, by the terminal, the second domain selection information from the VCC application server.

24. A device for providing service continuity and selecting a domain for an incoming call directed to a terminal in the service, the device comprising: a storage unit to store therein operator policy information and user preference information, the user preference information including domain selection information specifying a user-preferred domain to be used when transmitting the incoming call to the terminal, the operator policy information including domain selection information specifying a network-preferred domain to be used when transmitting the incoming call to the terminal; anda domain selection function unit to perform a domain selection for the incoming call based on the user preference information or the operator policy information.

25. The device of claim 24, wherein the domain selection function unit selects one of a circuit-switched (CS) domain and an IP multimedia subsystem (IMS) domain for the incoming call based on the domain selection information of the user preference information, the user preference information has higher priority than the operator policy information.

26. The device of claim 24, wherein the domain selection function unit selects one of a circuit-switched (CS) domain and an IP multimedia subsystem (IMS) domain for the incoming call based on the domain selection information of the operator policy information, the operator policy information has higher priority than the user preference information.

27. The device of claim 24, further comprising: a Ut interface unit to receive from the terminal the user preference information including the domain selection information set by a user, for storage in the storage unit.

28. The device of claim 24, further comprising: a receiver to receive the user preference information including the domain selection information set by a user using an apparatus other than the terminal, for storage in the storage unit.

29. The device of claim 24, further comprising: a Device Management unit to transmit the user preference information including the set domain selection information from the device to the terminal for storage in the terminal.

30. A terminal for providing service continuity and selecting a domain for an outgoing call originating from the terminal in the service, the terminal comprising: a storage unit to store operator policy information and user preference information, the user preference information including domain selection information specifying a user-preferred domain to be used when originating the outgoing call from the terminal, the operator policy information including domain selection information specifying a network-preferred domain to be used when originating the outgoing call from the terminal; anda controller to perform a domain selection for the outgoing call based on the user preference information or the operator policy information.

31. The terminal of claim 30, wherein the controller selects one of a circuit switched (CS) domain and an IP multimedia subsystem (IMS) domain for the outgoing call based on the domain selection information of the user preference information, if the user preference information has higher priority than the operator policy information.

32. The terminal of claim 30, wherein the controller selects one of a circuit switched (CS) domain and an IP multimedia subsystem (IMS) domain for the outgoing call based on the domain selection information of the operator policy information, if the operator policy information has higher priority than the user preference information.

33. The terminal of claim 30, wherein the storing unit receives, from a voice call continuity (VCC) application server, the operator policy information including the domain selection information.

34. The terminal of claim 37, wherein the terminal receives the operator policy information including the domain selection information from the VCC application server through a V3 interface.

35. The terminal of claim 30, wherein the controller transmits a query regarding a network's preference of a domain to a voice call continuity (VCC) application server, and receives the operator policy information including the domain selection information from the VCC application server for storage in the terminal.

36. The terminal of claim 35, wherein the controller receives the operator policy information including the domain selection information from the VCC application server using a V3 interface.

37. The terminal of claim 30, wherein the controller transmits the outgoing call over the selected domain.