Call setup method and terminal in a IP network

• US 20080144785A1
• Filed: 10/18/2007
• Published: 06/19/2008
• 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
• Granted Patent: US 8,600,017 B2
• Time in Patent Office: Days
• 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:

identifying, in response to a request for an outbound call from a first terminal, whether or not an index matching an identification of a second terminal exists in a matching table, wherein 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, directly transmitting a call initialization message to the second terminal; and

transmitting, in response to call setup, a call state synchronization message to a call manager.

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

if it is identified, in the identifying step, that the index matching the identification of the second terminal does not exist in the matching table,

transmitting the call initialization message to the call manager; and

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 1, wherein the transmitting step comprises transmitting the call state synchronization message to the call manager using a notify method.

4. 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.

5. 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 or not 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.

6. The call setup method according to claim 5, 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.

7. A call setup terminal in an Internet protocol network, comprising a controller, wherein said controller is configured to:

directly transmit a call initialization message to a destination terminal, if an index matching an identification of the destination terminal, which is inputted at an outbound call request, exists in a matching table;

transmit a call state synchronization message to a call manager in response to call setup; and

update an aging time of the matching table, if an index matching an identification, which is inputted at an inbound call request, exists in the matching table.

8. The call setup terminal according to claim 7, wherein said controller transmits the call initialization message to the call manager, if the index matching the identification of the destination terminal does not exist in the matching table, and adds a related index to the matching table in response to call setup.

9. The call setup terminal according to claim 7, wherein said controller transmits the call state synchronization message using a notify method.

10. The call setup terminal according to claim 8, wherein the related index added to the matching table includes counterpart identification information and final contact information.

11. The call setup terminal according to claim 7, wherein said controller deletes a related index from the matching table, if there is a change in an Internet protocol mapping to the identification of the destination terminal.