Method and system for establishing network-initiated PoC group session

• US 20060172753A1
• Filed: 01/11/2006
• Published: 08/03/2006
• Est. Priority Date: 01/11/2005
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Park, Sung-Jin, Sung, Sang-Kyung, Park, Joon-Goo
• Application Number:
  US11/329,614
• Publication Number:
  US 20060172753A1
• Time in Patent Office: Days
• US Class Current: 455/518
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• 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
• CPC Class Codes: H04W 80/10 adapted for application session management, e.g. SIP [Session Initiation Protocol] connection management H04W76/00; arrangements for session management H04L67/14

Abstract

Provided is a method and system for establishing a network-initiated PoC group session, capable of initiating establishment of a PoC session at a point of time when presence information of an opposite party intending to make a call is transited from a state in which a call can not be made to a state in which the call can be made, or at a time which a user designates in advance. The system includes at least one client that intends to initiate a session, and at least one opposite client; and a session management server for managing the session between clients belonging to an arbitrary group including the clients, determining whether an event, which meets requirements capable of initiating the session, occurs, and directly initiating the session without request of the clients when the event occurs. The server for managing the session between the clients belonging to the arbitrary group determines whether an event meeting any session initiation content stored in the server occurs, and directly initiates the session when the event meeting the session initiation content occurs.

Claims

1. A method for establishing a network-initiated PoC group session, the method comprising the steps of:

determining, by a server managing a session between clients belonging to an arbitrary group, whether an event meeting a session initiation content stored in the server occurs; and

directly initiating the session at the server when the event meeting the session initiation content occurs.

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

prior to performing the determining step whether the event meeting the session initiation content stored in the server occurs,

requesting previous setup for the session establishment.

3. The method according to claim 2, wherein the step of requesting the previous setup makes use of an SIP (Session Initiation Protocol) PUBLISH message.

4. The method according to claim 3, wherein the SIP PUBLISH message has a format including an Event header for the previous setup for the session establishment.

5. The method according to claim 4, wherein the Event header includes a time at which the client intending to initiate the session desires that the session is established, or presence information of an opposite client at that time.

6. The method according to claim 3, wherein the session management server, which receives the PUBLISH message for the session establishment, includes a step of transmitting a response message to the client that has sent the PUBLISH message.

7. The method according to claim 6, wherein the client that has sent the PUBLISH message:

requests a SLBSCRIBE message in order to check information which the client sets up or whether the event occurs; and

when a response signal to the SUBSCRIBE message is received, transmits a NOTIFY message including update information of the event in response to the SUBSCRIBE message request to the client that makes a request for the session establishment.

8. The method according to claim 2, wherein the step of requesting previous setup for the session establishment makes use of an RTCP (Real Time Transport Control Protocol) message in the case of an ordinary mobile wireless terminal other than a dedicated PoC client terminal.

9. The method according to claim 8, wherein the RTCP message includes at least one of an address information list of PoC users invited to the PoC session, an identifier of a corresponding group identifier, a typeof PoC group, information on a request for a manual answer override mode, a name of the PoC group session, a time to initiate the session, information on a requester who requests the PoC session establishment, and an IP address of an external IP terminal.

10. The method according to claim 1, further comprising prior to performing the determining step whether the event meeting the session initiation content stored in the server occurs,

registering, by the client intending to initiate the session, a time to initiate the session establishment using a terminal belonging to the client intending to initiate the session.

11. The method according to claim 1, further comprising prior to performing the determining step whether the event meeting the session initiation content stored in the server occurs,

registering, by the client intending to initiate the session, a reference value of determining whether to initiate the session according to a state of presence information of a terminating side client using a terminal belonging to the client intending to initiate the session.

12. The method according to claim 11, wherein the reference value of determining whether to initiate the session according to the presence information state of the terminating side client is set up as a point of time when the presence information of the terminating side client is transited from a call unavailable state to a call available state.

13. The method according to claim 1, wherein the session initiation content is set up such that an originating side client belonging to the session initiates the session at a previously designated time.

14. The method according to claim 1, wherein the session initiation content is set up so as to initiate the session when a terminating side client belonging to an event session at the time of system initiation is ready to connect the session using presence information thereof.

15. The method according to claim 1, wherein the step of directly initiating the session at the server includes

transmitting an INVITE message from the server to an originating side client that makes a request for the session initiation;

and

transmitting the INVITE message to a terminating side client intending to connect to the session when a response signal to the INVITE message is received from the originating side client.

16. The method according to claim 1, wherein the step of directly initiating the session at the server includes

transmitting an INVITE message from the server to a terminating side client that intends to connect to the session;

and

transmitting the INVITE message to an originating side client that makes a request for the session initiation when a response signal to the INVITE message is received from the terminating side client.

17. The method according to claim 1, wherein the step of directly initiating the session at the server includes

transmitting an INVITE message from the server to both originating side client that makes a request for the session initiation and a terminating side client that intends to connect to the session at the same time;

and

transmitting a Floor Granted signal to a client to which a floor is granted and a Floor Taken signal to a client to which the floor is not granted when a response signal to the INVITE message is received from at least one of the originating side client and the terminating side client.

18. A system for establishing a network-initiated PoC group session, the system comprising:

at least one client that intends to initiate a session, and at least one opposite client; and

a session management server for managing the session between clients belonging to an arbitrary group including the clients, determining whether an event, which meets requirements capable of initiating the session, occurs, and directly initiating the session without request of the clients when the event occurs.

19. The system according to claim 18, wherein the session management server includes a storage for storing information on previous setup of the session establishment, the information being directed to determine whether the event meeting the session initiation requirements occurs.

20. The system according to claim 19, wherein the session establishment previous setup information stored in the storage is registered with the session management server by the client, which intends to initiate the session, by transmitting an SIP (Session Initiation Protocol) PUBLISH message to the session management server using a terminal belonging to the client.

21. The system according to claim 20, wherein the SIP PUBLISH message has a format including an Event header for the session establishment previous setup.

22. The system according to claim 19, wherein the session establishment previous setup information stored in the storage is registered with the session management server by transmitting an RTCP (Real Time Transport Control Protocol) message to the session management server, when a terminal of the client intending to initiate the session is an ordinary mobile wireless terminal.

23. The system according to claim 22, wherein the RTCP message includes at least one of an address information list of PoC users invited to the PoC session, an identifier of a corresponding group identifier, a type of PoC group, information on a request for a manual answer override mode, a name of the PoC group session, a time to initiate the session, information on a requester who requests the PoC session establishment, and an IP address of an external IP terminal.

24. The system according to claim 18, wherein the session management server initiates the session by transmitting an INVITE message to an originating side client that makes a request for the session initiation, and by transmitting the INVITE message to a terminating side client that intends to connect to the session when a response signal to the INVITE message is received from the originating side client.

25. The system according to claim 18, wherein the session management server initiates the session by transmitting an INVITE message to a terminating side client that intends to connect to the session, and by transmitting the INVITE message to an originating side client that makes a request for the session initiation when a response signal to the INVITE message is received from the terminating side client.

26. The system according to claim 18, wherein the session management server initiates the session by transmitting an INVITE message from the server to both an originating side client that makes a request for the session initiation and a terminating side client that intends to connect to the session at the same time, and by transmitting a Floor Granted signal to a client to which a floor is granted and a Floor Taken signal to a client to which the floor is not granted when a response signal to the INVITE message is received from at least one of the originating side client and the terminating side client.

27. A PoC terminal of a PoC system comprising:

means for transmitting session establishment previous setup information, which includes a time at which a client intending to initiate a session desires that the session is established, or presence information of an opposite client at that time, to a session management server using an SIP (Session Initiation Protocol) PUBLISH message, and registering the previous setup information with the session management server; and

means for receiving an INVITE message from the session management server when an event corresponding to the previous setup information occurs, and initiating the session.

28. A PoC server of a PoC system comprising:

means for receiving session establishment previous setup information, which includes a time at which a client intending to initiate a session desires that the session is established, or presence information of an opposite client at that time, from terminals using an SIP (Session Initiation Protocol) PUBLISH message; and

means for storing and managing the information received from the terminals in a session establishment previous setup storage, and transmitting an INVITE message for initiating the session to the corresponding terminal when an event meeting content stored in the storage occurs.

29. A wireless mobile terminal of a PoC system comprising:

means for transmitting session establishment previous setup information, which includes a time at which a client intending to initiate a session desires that the session is established, or presence information of an opposite client at that time, to a session management server using an RTCP (Real Time Transport Control Protocol) message, and registering the previous setup information with the session management server; and

means for receiving an INVITE message from the session management server when an event corresponding to the previous setup information occurs, and initiating the session.

30. The wireless mobile terminal according to claim 29, wherein the RCTP message includes at least one of an address information list of PoC users invited to the PoC session, an identifier of a corresponding group identifier, a type of PoC group, information on a request for a manual answer override mode, a name of the PoC group session, a time to initiate the session, information on a requester who requests the PoC session establishment, and an IP address of an external IP terminal.

31. A PoC server of a PoC system comprising:

means for receiving session establishment previous setup information, which includes a time at which a client intending to initiate a session desires that the session is established, or presence information of an opposite client at that time, from terminals using an RTCP (Real Time Transport Control Protocol) message; and

means for storing and managing the information received from the terminals in a session establishment previous setup storage, and transmitting an INVITE message for initiating the session to the corresponding terminal when an event meeting content stored in the storage occurs.