Method and apparatus for processing call in PTT over cellular (PoC) system

• US 20060014556A1
• Filed: 07/15/2005
• Published: 01/19/2006
• Est. Priority Date: 07/16/2004
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Park, Sung-Jin, Sung, Sang-Kyung, Jung, Ki-Ho
• Application Number:
  US11/182,271
• Publication Number:
  US 20060014556A1
• Time in Patent Office: Days
• US Class Current: 455/518
• CPC Class Codes: H04L 65/1013 Network architectures, gateways, control or user entities
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/4061 Push-to services, e.g. push-to-talk or push-to-video
• 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

A push to talk (PTT) system. Where when there is a call connection request to any terminal in a PTT system with a pre-established session, a query message is transmitted to a PTT terminal receiving the call connection request in order to determine to accept a call request, and a determination is made as to whether to connect the call based on a response message, this preventing a waste of resources and time due to unnecessary session establishment.

Claims

1. A method for processing a call in a push to talk (PTT) over cellular (PoC) network, the method comprising the steps of:

pre-establishing a session between a PoC client and a PoC server;

receiving a call connection request message by the PoC server with the pre-established session;

transmitting, by the PoC server, a query message to the PoC client to determine if the PoC client accepts the call connection; and

transmitting, by the PoC client, a response message to the PoC server in response to the query message.

2. The method according to claim 1, wherein the query message includes information related to a client requesting the call connection.

3. The method according to claim 2, further comprising a step of establishing a session with the client requesting the call connection when the response message indicates that the call connection request is accepted.

4. The method according to claim 2, wherein when the PoC client refuses to accept the call connection request, the response message includes information that the PoC call is not accepted.

5. The method according to claim 1, wherein the call connection request message, the query message and the response message are session initiation protocol (SIP) messages.

6. A system for processing a call in a push to talk (PTT) over cellular (PoC) network, the system comprising:

a sending PoC system having a PoC server that transmits a PoC call connection request message;

a receiving PoC server that receives the call connection request message from the sending PoC system and generates a query message to determine if the call connection request is accepted; and

a receiving PoC client that establishes a session with the receiving PoC server, receives the query message from the receiving PoC server with the established session, and transmits a response message to the query message to the receiving PoC server.

7. The system according to claim 6, wherein the call connection request message and the query message includes information related to a client requesting the call connection.

8. The system according to claim 7, wherein the call connection request message, the query message and the response message are SIP messages.

9. A push to talk (PTT) over cellular (PoC) client for performing a call connection on a PoC network, wherein the PoC client establishes a session with a receiving PoC server and the PoC client receives a query message to a call connection request message from the receiving PoC server, and transmits a response message indicating whether to accept the call connection.

10. The PoC client according to claim 9, wherein the call connection request message and the query message include information about a client requesting the call connection.

11. A method for performing call processing in a push to talk (PTT) over cellular (PoC) client on a PoC network, the method comprising the steps of:

pre-establishing a session between the PoC client and a PoC server;

receiving a query message related to a call connection from the PoC server with the pre-established session; and

transmitting a response message indicating whether to accept the call connection.

12. The method according to claim 11, wherein the query message includes information about a client requesting the call connection.