Method and system for call set-up between mobile communication terminals

• US 20060165043A1
• Filed: 01/25/2006
• Published: 07/27/2006
• Est. Priority Date: 01/26/2005
• Status: Active Grant

• Current Assignee: Pantech Corporation (Ideahub, Inc.)
• Original Assignee: Pantech Co. Ltd. (Pantech Incorporated)
• Inventors: Yoon, Mi Ja
• Granted Patent: US 7,809,839 B2
• Time in Patent Office: Days
• US Class Current: 370/346
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC

Abstract

Disclosed are method and system for a call set-up in a mobile communication terminal. According to the invention, it is provided a structure capable of performing a call set-up using a binary Session Initiation Protocol (SIP) message of short data burst, instead of using a general traffic channel, when a call is set up between the mobile communication terminals on the basis of the SIP. Consequently, it is possible to minimize a delay time required for the call set-up between the mobile communication terminals for providing a SIP signaling protocol service.

Claims

1. A method for a call set-up between mobile communication terminals comprising steps of:

receiving a signaling message for a call set-up with a call-incoming terminal from a call-originating terminal through short data burst (SDB);

setting up a traffic channel of the call-originating terminal depending on an origination signal sent by the call-originating terminal after transmitting the signaling message;

receiving a response message of the call-incoming terminal to the signaling message; and

setting up a traffic channel of the call-incoming terminal depending on an origination signal sent by the call-incoming terminal after transmitting the response message.

2. The method according to claim 1, wherein the signaling message is a binary session initiation protocol (SIP) message.

3. The method according to claim 2, wherein the binary SIP message is a compressed type of a standard full SIP message and contains information about Method, application ID and service type.

4. The method according to claim 2, wherein the binary SIP message is structured to have a minimal size capable of being transmitted through the SDB.

5. The method according to claim 1, wherein the signaling message is received through an access channel.

6. The method according to claim 2, wherein the step of setting up the traffic channel of the call-originating terminal comprises sub-steps of:

receiving an origination signal from the call-originating terminal;

converting the binary SIP message received from the call-originating terminal into a standard full SIP message; and

routing the standard full SIP message to a group talk server (GTS).

7. The method according to claim 6, wherein the step of setting up the traffic channel of the call-originating terminal further comprises a sub-step of routing the standard full SIP message to a media server (MRC).

8. The method according to claim 7, wherein the response message to the signaling message is a message of a standard full SIP type message transmitted from the MRC if a connection is made between the call-originating terminal and the MRC.

9. The method according to claim 6, wherein the call-incoming terminal tries an origination to set up the traffic channel of the call-incoming terminal, the call-originating terminal having received the standard full SIP message converted into the binary SIP message under dormant state.

10. The method according to claim 9, wherein the conversion of the standard full SIP message into the binary SIP message is carried out by a proxy server managing the call-incoming terminal.

11. The method according to claim 1, further comprising a step that the call-originating terminal starts a data transmission while the call-incoming terminal is being set up.

12. The method according to claim 11, further comprising a step that the call-incoming terminal receives and plays the data when the traffic channel of the call-incoming terminal is activated while the call-originating terminal transmits the data.

13. A system for a call set-up between mobile communication terminals comprising:

call-originating base station and proxy server receiving a signaling message for a call set-up with a call-incoming terminal from a call-originating terminal, receiving an origination signal for a set-up of a traffic channel from the call-originating terminal after receiving the signaling message and setting up the traffic channel of the call-originating terminal depending on the origination signal;

call-incoming base station and proxy server transmitting the signaling message to the call-incoming terminal, receiving a response message to the signaling message from the call-incoming terminal, receiving an origination signal for a set-up of a traffic channel from the call-incoming terminal after receiving the response message and setting up the traffic channel of the call-incoming terminal depending on the origination signal; and

a GTS intermediating between the call-originating base station and proxy server and the call-incoming base station and proxy server, and transmitting/receiving the signaling message and the response message.

14. The system according to claim 13, wherein the signaling message transmitted from the call-originating terminal is a binary SIP message.

15. The system according to claim 14, wherein the call-originating base station and proxy server converts and then transmits the binary SIP message sent from the call-originating terminal into a standard full SIP message to the GTS.

16. The system according to claim 15, wherein the call-incoming base station and proxy server converts and then transmits the standard full SIP message into a binary SIP message to the call-incoming terminal.

17. The system according to claim 15, further comprising a media server (MRC) receiving the standard full SIP message from the GTS and transmitting a response message to the signaling message.