Call setup method and terminal in an IP network

• US 8,600,017 B2
• Filed: 10/18/2007
• Issued: 12/03/2013
• Est. Priority Date: 12/19/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Dae-Hyun
• Primary Examiner(s): Nawaz, Asad
• Assistant Examiner(s): Patel, Parth
• Application Number:
  US11/907,943
• Publication Number:
  US 20080144785A1
• Time in Patent Office: 2,238 Days
• Field of Search: 370/401, 370/352, 370/338, 370/469, 370/219, 370/389, 370/328, 370/356, 370/392, 709/223, 709/227, 709/249, 348/751, 379/1.02, 455/411
• US Class Current: 379/88.17
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04M 1/2535 adapted for voice communication over an Internet Protocol [IP] network Voice over Internet Protocol (VoIP) network equipment and services H04M7/006; implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] H04L69/16
• CPC Class Codes: H04M 7/0075 Details of addressing, directories or routing tables

Abstract

A call setup method and terminal in an IP network, in which in response to a request for an outbound call from a first terminal, it is identified whether or not an index matching an identification of a second terminal exists in a matching table. The identification of the second terminal is inputted at the request for the outbound call. If the index matching the identification of the second terminal exists in the matching table, a call initialization message is directly transmitted to the second terminal. In response to call setup, a call state synchronization message is transmitted to a call manager.

Claims

1. A call setup method in an Internet protocol network, comprising:

receiving, at a first terminal, a request for an outbound call associated with an identification of a second terminal;

identifying, at the first terminal in response to receiving the request, whether an index matching the identification of the second terminal exists in a matching table;

if the index matching the identification of the second terminal exists in the matching table, updating an aging time of the matching table and directly transmitting, by the first terminal, a call initialization message to the second terminal; and

transmitting, by the first terminal in response to call setup, a call state synchronization message to a call manager,

wherein the matching table is refreshed upon expiration of the aging time.

2. The call setup method according to claim 1, further comprising:

if the index matching the identification of the second terminal does not exist in the matching table, transmitting, by the first terminal, the call initialization message to the call manager;

adding, in response to call setup, a related index to the matching table; and

processing the requested outbound call.

3. The call setup method according to claim 2, wherein the related index added to the matching table includes counterpart identification information and final contact information.

4. The call setup method according to claim 3, wherein the counterpart identification information and the final contact information are associated with the second terminal.

5. The call setup method according to claim 1, wherein the call state synchronization message is transmitted to the call manager using a notify method.

6. The call setup method according to claim 1, wherein the call state synchronization message is transmitted to the call manager to initiate call state synchronization with the call manager.

7. The call setup method according to claim 1, wherein the matching table is local to the first terminal.

8. A call setup method in an Internet Protocol network, comprising:

identifying, in response to a request from a first terminal for an inbound call of a second terminal, whether an index matching an input identification exists in a matching table;

if the index matching the identification of the second terminal exists in the matching table, updating an aging time of the matching table; and

after the aging time is updated, processing the requested inbound call,

wherein the matching table is refreshed upon expiration of the aging time.

9. The call setup method according to claim 8, further comprising:

if it is identified, in the identifying step, that there is a change in an Internet protocol mapping to the identification of the second terminal, deleting a related index from the matching table.

10. The call setup method according to claim 8, wherein the identifying, the updating, and the processing occur at the first terminal.

11. The call setup method according to claim 8, wherein the matching table is local to the first terminal.

12. The call setup method according to claim 8, wherein the aging time is associated with the index matching the identification of the second terminal.

13. A call setup terminal in an Internet protocol network, comprising:

a controller configured to;

receive a request for an outbound call associated with an identification of a destination terminal, and

determine whether an index matching the identification of the destination terminal exists in a matching table,

wherein if the index matching the identification of the destination terminal exists in the matching table, the controller is further configured to;

cause, at least in part, a call initialization message to be directly transmitted to the destination terminal,

cause, at least in part, a call state synchronization message to be transmitted to a call manager in response to call setup, and

update an aging time of the matching table, and

wherein the matching table is refreshed upon expiration of the aging time.

14. The call setup terminal according to claim 13, wherein if the index matching the identification of the destination terminal does not exist in the matching table, the controller is further configured to:

cause, at least in part, the call initialization message to be transmitted to the call manager; and

add a related index to the matching table in response to call setup.

15. The call setup terminal according to claim 14, wherein the related index added to the matching table comprises counterpart identification information and final contact information.

16. The call setup terminal according to claim 15, wherein the counterpart identification information and the final contact information are associated with the destination terminal.

17. The call setup terminal according to claim 13, wherein the controller is further configured to:

cause, at least in part, the call state synchronization message to be transmitted to the call manager using a notify method.

18. The call setup terminal according to claim 13, wherein the controller is further configured to:

delete, if there is a change in an Internet protocol mapping to the identification of the destination terminal, a related index from the matching table.

19. The call setup terminal according to claim 13, wherein the call state synchronization message is caused, at least in part, to be transmitted to the call manager to initiate call state synchronization with the call manager.

20. The call setup terminal according to claim 13, wherein the matching table is local to the call setup terminal.