System and method for providing simultaneous multiple push-to-talk over cellular multimedia service

• US 20070076660A1
• Filed: 09/28/2006
• Published: 04/05/2007
• Est. Priority Date: 09/30/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Sung, Sang-Kyung, Pu, Hyeon-Cheol
• Granted Patent: US 8,175,010 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/1089 by adding media; by removing media
• CPC Class Codes: H04L 65/4038 with floor control
• CPC Class Codes: H04L 65/4061 Push-to services, e.g. push-to-talk or push-to-video
• CPC Class Codes: H04L 65/762 at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04L 67/147 Signalling methods or messages providing extensions to protocols defined by standardisation
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

Abstract

A system and method provide simultaneous multiple push-to-talk (PTT) over cellular (PoC) multimedia service, and enable a PoC client performing an OMA PoC multimedia communication service to be simultaneously provided with a plurality of media streams, and also allows efficient media transmission through media adaptation adjusting capacity of each of the media streams provided at the same time.

Claims

1. A method for providing simultaneous multiple push-to-talk-over-cellular (PoC) multimedia service in a PoC system, the method comprising the steps of:

receiving a request for establishment of a new PoC multimedia session of a PoC terminal performing multimedia PoC service through a pre-established PoC session;

determining whether the PoC terminal supports simultaneous multiple multimedia sessions and whether the PoC terminal requests media adaptation;

adjusting sizes of multimedia data being transmitted and data to be transmitted to the PoC terminal according to whether the PoC terminal supports simultaneous multiple multimedia sessions and whether the PoC terminal requests media adaptation; and

transmitting the adjusted data to the PoC terminal.

2. The method according to claim 1, wherein the step of determining whether the PoC terminal supports simultaneous multiple multimedia sessions and whether the PoC terminal requests media adaptation comprises:

determining whether an auto-answer mode of the PoC terminal is set up; and

detecting pre-stored setup information about the PoC terminal when the auto-answer mode is set up, and determining whether the PoC terminal supports simultaneous multiple multimedia sessions and whether the PoC terminal requests media adaptation.

3. The method according to claim 1, wherein the step of determining whether the PoC terminal supports simultaneous multiple multimedia sessions and whether the PoC terminal requests media adaptation comprises:

transmitting a message querying whether the PoC terminal supports simultaneous multiple multimedia sessions and whether the PoC terminal requests media adaptation; and

receiving a response message to the query message from the PoC terminal, detecting information included in the response message, and determining whether not the PoC terminal supports simultaneous multiple multimedia sessions and whether the PoC terminal requests media adaptation.

4. The method according to claim 3, wherein the query message and the response message are transmitted using Session Initiation Protocol (SIP) or Real-time Transport Control Protocol (RTCP).

5. The method according to claim 1, wherein the media adaptation is carried out based on the number of multimedia sessions that are provided at the same time.

6. The method according to claim 5, wherein the media adaptation is carried out based on a type of requested display.

7. The method according to claim 1, wherein the media adaptation is carried out based on a preset rule including at least one of a maximum number of displays, a division ratio of display, and a screen size.

8. The method according to claim 1, wherein the media adaptation is carried out based on a request of the PoC terminal.

9. A message used for providing simultaneous multiple push-to-talk-over-cellular (PoC) multimedia service, the message comprising a Session Initiation Protocol (SIP) message having Talk Burst Control Protocol (TBCP) option parameters indicating whether media adaptation is requested, whether an uplink or downlink exists, and a type of media data.

10. An apparatus for providing simultaneous multiple push-to-talk-over-cellular (PoC) multimedia service in a PoC server, the apparatus comprising:

a participating PoC function (PF) composer for managing a plurality of PoC multimedia sessions;

a media adapter for adjusting a size of media data received through the PF composer and transmitted through the plurality of PoC multimedia sessions connected to one PoC terminal; and

a media transmitter for transmitting the media data adjusted by the media adapter to the PoC terminal.

11. The apparatus according to claim 10, wherein the plurality of PoC multimedia sessions connected to one PoC terminal include at least one pre-established PoC multimedia session and a PoC multimedia session that is newly requested before the pre-established PoC multimedia session is terminated.

12. The apparatus according to claim 10, wherein the media adapter performs media adaptation on the media data transmitted to the PoC terminal that supports simultaneous multiple multimedia sessions and requests the media adaptation.

13. The apparatus according to claim 12, wherein the media adapter refers to information on an auto-answer mode setup of a corresponding PoC terminal in order to determine whether the corresponding PoC terminal supports simultaneous multiple multimedia sessions and whether the PoC terminal requests media adaptation.

14. The apparatus according to claim 12, wherein the media adapter performs query and response with a corresponding PoC terminal in order to determine whether the corresponding PoC terminal supports simultaneous multiple multimedia sessions and whether the PoC terminal requests media adaptation.

15. The apparatus according to claim 14, wherein the query and response are performed using Session Initiation Protocol (SIP) or Real-time Transport Control Protocol (RTCP).

16. A system for providing simultaneous multiple push-to-talk-over-cellular (PoC) multimedia service, the system comprising:

a PoC terminal provided with a PoC service; and

a PoC server for determining whether the PoC terminal supports simultaneous multiple multimedia sessions and whether the PoC terminal requests media adaptation when requested to establish a plurality of PoC multimedia sessions of the PoC terminal, adjusting a size of media data to be transmitted to the PoC terminal through the plurality of PoC multimedia sessions when the PoC terminal supports simultaneous multiple multimedia sessions and requests the media adaptation, and transmitting the adjusted media data to the PoC terminal.

17. The system according to claim 16, further comprising a Session Initiation Protocol/Internet Protocol (SIP/IP) core providing SIP-based communication between the PoC terminal and the PoC server.

18. The system according to claim 16, wherein the PoC server comprises:

a participating PoC function (PF) composer for managing the plurality of PoC multimedia sessions;

a media adapter for adjusting the size of media data received through the PF composer and transmitted through the plurality of PoC multimedia sessions connected to one PoC terminal; and

a media transmitter for transmitting the media data adjusted by the media adapter to the PoC terminal.

19. The system according to claim 16, wherein the plurality of PoC multimedia sessions connected to one PoC terminal include at least one pre-established PoC multimedia session and a PoC multimedia session that is newly requested before the pre-established PoC multimedia session is terminated.

20. The system according to claim 16, wherein the PoC server performs media adaptation on only the media data transmitted to the PoC terminal that supports simultaneous multiple multimedia sessions and requests media adaptation.

21. The system according to claim 20, wherein the PoC server refers to information on an auto-answer mode setup of a corresponding PoC terminal in order to determine whether the corresponding PoC terminal supports simultaneous multiple multimedia sessions and whether the PoC terminal requests media adaptation.

22. The system according to claim 20, wherein the PoC server performs query and response with a corresponding PoC terminal in order to determine whether the corresponding PoC terminal supports simultaneous multiple multimedia sessions and whether the PoC terminal requests media adaptation.

23. The system according to claim 22, wherein the query and response are performed using Session Initiation Protocol (SIP) or Real-time Transport Control Protocol (RTCP).

24. The system according to claim 16, wherein the PoC terminal comprises:

a media transmitter for exchanging packet data with respect to the PoC server;

a display controller for performing data processing for displaying the media data received through the media transmitter; and

a display for receiving and displaying the display-processed data from the display controller.