Method and Apparatus for Determining Pt Server Having Controlling Function

• US 20080285486A1
• Filed: 10/20/2006
• Published: 11/20/2008
• Est. Priority Date: 11/14/2005
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Huh, Kang-Suk
• Granted Patent: US 8,462,669 B2
• Time in Patent Office: Days
• US Class Current: 370/260
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/4038 with floor control
• CPC Class Codes: H04W 4/08 User group management
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services

Abstract

Disclosed is a method and apparatus for determining a controlling PT server. A mobile communication terminal transmits a group generation request message to a PT XDMS, and the PT XDMS determines a specific PT server having the largest number of members as a controlling PT server. The PT XDMS generates group identity information by using an address of the specific PT server, and transmits a group generation response message including the group identity information to the mobile communication terminal. Then, the mobile communication terminal transmits the group identity information of the group generation response message to a PT server with being included in an INVITE message. The PT server certifies the group identity information included in the INVITE message, and determines whether or not itself is to be operated as a controlling PT server.

Claims

1. In a method for generating a group including a plurality of PT clients that belong to different PT servers, a method for determining a PT server having a controlling function, in which a PT database server determines a specific PT server having the largest number of PT clients of the group as a PT server having a controlling function.

2. The method of claim 1, further comprising:

the PT database server'"'"'s generating group identity information of the group by using an address of the specific PT server having a controlling function; and

the PT database server'"'"'s transmitting a group generation response message including the group identity information to a specific PT client having transmitted a group generation request message.

3. The method of claim 1, wherein the PT database server checks a PT server having the largest number of PT clients by using a PT service identity (Conference-Factory-URI for PT service) respectively allocated to the PT clients.

4. The method of claim 2, further comprising transmitting an INVITE message including at least the group identity information to a network by the specific PT client.

5. A method for determining a controlling PT server, comprising:

transmitting a group generation request message to a network by a mobile communication terminal;

receiving a group generation response message including group identity information of a group generated according to the group generation request message from the network; and

transmitting an INVITE message including at least the group identity information of the group generation response message by the mobile communication terminal.

6. The method of claim 5, wherein the group identity information is generated by using an address of a PT server having the largest number of members of the group.

7. The method of claim 5, wherein the group identity information is generated by using an address of a PT server determined as a controlling PT server by a PT XDMS server.

8. The method of claim 5, further comprising:

when a PT server having received the INVITE message has the group identity information of the INVITE message, operating the PT server as a controlling PT server; and

when a PT server having received the INVITE message does not have the group identity information of the INVITE message, transmitting the INVITE message to another PT server by the PT server.

9. The method of claim 5, wherein the network includes at least an aggregation proxy.

10. In an apparatus for determining a controlling PT server among different PT servers to which a plurality of members belong, a mobile communication terminal comprising:

an XDM client for transmitting a group generation request message to a specific network component, receiving a group generation response message including at least group identity information of a group from the specific network component, the group generated according to the group generation request message; and

a PT client for transmitting an INVITE message including at least the group identity information of the group generation response message.

11. The mobile communication terminal of claim 10, wherein the group identity information is generated by determining a PT server having the largest number of members as a controlling PT server, and by using an address of the controlling PT server by a PT database server.

12. The mobile communication terminal of claim 10, wherein the PT client transmits the INVITE message to a PT server to which itself belongs.

13. The mobile communication terminal of claim 10, wherein when a PT server having received the INVITE message has the group identity information of the INVITE message, the PT server is operated as a controlling PT server, and the PT server is a PT server having the largest number of members.

14. The mobile communication terminal of claim 10, wherein when a PT server having received the INVITE message does not have the group identity information of the INVITE message, the PT server transmits the INVITE message to another PT server.

15. The mobile communication terminal of claim 10, further comprising at least one of:

a transceiver for transceiving radio signals;

a user interface for interfacing with a user; and

a memory for storing the group identity information included in the group generation response message.

16. The mobile communication terminal of claim 10, wherein the specific network component comprises at least an aggregation proxy.