Managing a packet switched conference call

• US 7,483,400 B2
• Filed: 07/03/2003
• Issued: 01/27/2009
• Est. Priority Date: 07/04/2002
• Status: Active Grant

• Current Assignee: ThinkLogix, LLC (Ascend Innovation Management, LLC)
• Original Assignee: Spyder Navigations LLC (Intellectual Ventures LLC)
• Inventors: Kuusinen, Jarmo, Lakaniemi, Ari
• Primary Examiner(s): Tsang; Fan
• Assistant Examiner(s): Hashem; Lisa
• Application Number:
  US10/613,986
• Publication Number:
  US 20040076277A1
• Time in Patent Office: 2,035 Days
• Field of Search: 370/260, 370261-269, 37920201-20701
• US Class Current: 370/267
• CPC Class Codes: H04L 12/1822 Conducting the conference, e.g. admission, detection, selection or grouping of participants, correlating users to one or more conference sessions, prioritising transmission
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/403 Arrangements for multi-party communication, e.g. for conferences data switching systems for conference H04L12/18; arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities H04M3/56; television conferencing systems H04N7/15
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04M 2207/18 wireless networks
• CPC Class Codes: H04M 3/569 using the instant speaker's algorithm speech detection per se G10L25/78
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42

Abstract

The invention relates to a method for managing a packet switched, centralized conference call between a plurality of terminals 13. In order to enable an enhancement of the user comfort, it is proposed that the method comprises at a conference call server 12 receiving data packets from all terminals 13. Based on these data packets, then at least one terminal 13 currently providing voice data is determined. In a next step, the data received in the data packets is mixed, and the mixed data is inserted into new data packets together with at least one identifier associated to one of the terminals 13 which were determined to provide voice data, such that the at least one identifier can be distinguished from any other information in the data packets. Finally, the new data packets are transmitted to terminals 13 participating in the conference call. The invention relates equally to a corresponding server and to a corresponding terminal.

Claims

1. A method for managing a packet switched, centralized conference call between terminals, said method comprising:

receiving streams of data packets from each of a plurality of terminals participating in a conference call, wherein each data packet includes voice data or background noise information, and further wherein each data packet includes an identifier associated with a respective terminal providing the data packet;

determining, based on the received data packets, if any of the plurality of terminals participating in the conference call are currently providing voice data, and, if so, identifying each terminal currently providing voice data;

mixing voice data and background noise information included in the received streams of data packets to generate encoded combined data;

inserting the encoded combined data into outbound data packets together with indicia identifying each terminal that provided any voice data associated with the encoded combined data for each outbound data packet; and

streaming the outbound data packets to the plurality of terminals participating in the conference call.

2. The method according to claim 1, wherein said identifiers are randomly associated with each of the plurality of terminals, and further wherein said data packets include a mapping of the identifiers to the plurality of terminals, and further comprising providing the mapping to each of the plurality of terminals participating in said conference call.

3. The method according to claim 1, further comprising inserting second indicia into the outbound data packets together with the encoded combined data and the indicia, wherein the second indicia identifies each terminal that provided background noise information associated with the encoded combined data for each outbound data packet.

4. The method according to claim 3, further comprising using a marker to separate first identifiers associated with any terminals that provided the voice data from second identifiers associated with terminals that provided the background noise information.

5. The method according to claim 4, wherein said marker corresponds to a server identifier associated with said conference call server.

6. The method according to claim 1, wherein said conference call is based on Real-time Transport Protocol (RTP), wherein said data packets are RTP packets, and further wherein said identifiers associated with each of the plurality of terminals are Synchronization Source (SSRC) identifiers.

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

receiving said outbound data packets transmitted by said conference call server at a terminal participating in said conference call; and

identifying, at the terminal, at least one terminal that provided the voice data based at least in part on the indicia included in said received outbound data packets.

8. A method for identifying an active terminal of a plurality of terminals participating in a centralized conference call, the method comprising:

sending a first data packet from a first terminal participating in a conference call to a conference call server, wherein the first data packet includes background noise information and an identifier associated with the first terminal;

receiving a second data packet from the conference call server at the first terminal, wherein the second data packet includes the background noise information mixed with voice data from a second terminal participating in the conference call and an active terminal identifier associated with the second terminal, and further wherein the voice data is included in the second data packet based at least in part on a determination by the conference call server that a third data packet received from the second terminal includes the voice data; and

presenting the active terminal identifier at the first terminal, wherein the active terminal identifier indicates that the second terminal sent the voice data to the conference call server.

9. The method of claim 8 wherein the conference call is based on a real-time transport protocol (RTP).

10. The method of claim 9 wherein the first data packet and the second data packet are RTP packets.

11. A method for managing a packet switched, centralized conference call between terminals, the method comprising:

decoding a first data packet received from a first terminal of a plurality of terminals participating in a conference call at a conference call server, wherein the first data packet includes voice data-and an identifier associated with the first terminal;

decoding a second data packet received from a second terminal of the plurality of terminals participating in the conference call at the conference call server, wherein the second data packet includes background noise information;

determining that the first data packet includes the voice data;

mixing the decoded voice data and the decoded background noise information;

inserting the mixed voice data and background noise information into a third data packet together with the identifier; and

sending the third data packet to the plurality of terminals participating in the conference call.

12. The method of claim 11 wherein the received second data packet further includes a second identifier associated with the second terminal.

13. The method of claim 12 wherein the transmitted third data packet further includes the second identifier.

14. The method of claim 13 wherein the identifier is included in the third data packet at a predetermined position relative to the second identifier.

15. The method of claim 14 wherein a third identifier is included as a marker in the third data packet between the identifier and the second identifier.

16. The method of claim 15 wherein the third identifier is included in the third data packet in a plurality of positions.

17. The method of claim 13 further comprising:

receiving a fourth data packet from a third terminal participating in the conference call, wherein the fourth data packet includes second voice data-and a fourth identifier associated with the third terminal;

determining that the fourth data packet includes the second voice data; and

inserting the fourth identifier into the third data packet, wherein the mixed voice data and background noise information includes the second voice data.

18. The method of claim 17 wherein a third identifier is included as a marker in the third data packet between the second identifier associated with a non-speaking terminal and the identifier and the fourth identifier associated with speaking terminals.

19. A method for managing a packet switched, centralized conference call between terminals, the method comprising:

receiving a stream of real-time transport protocol (RTP) packets from a plurality of terminals participating in a voice over Internet protocol (VoIP) conference call at a conference call server;

decoding the received stream to extract background noise information and any voice data;

determining if the decoded stream includes any voice data;

if the decoded stream includes voice data, extracting an identifier associated with a first terminal from which the decoded voice data is received;

mixing the decoded voice data, if any, with the decoded background noise information;

inserting the mixed voice data and background noise information and the extracted identifier, if any, into an outbound RTP packet; and

streaming the outbound RTP packet to the plurality of terminals participating in the VoIP conference call.

20. The method of claim 19 wherein the decoded stream includes voice data from a first plurality of terminals, and further wherein identifiers associated with the first plurality of terminals are inserted in a header of the outbound RTP packet.

21. The method of claim 20 wherein the decoded stream includes background noise information from a second plurality of terminals, and further wherein second identifiers associated with the second plurality of terminals are inserted in the header.

22. The method of claim 21 wherein a server identifier associated with the conference call server is included in the header as a marker between the identifiers associated with the first plurality of terminals and the second identifiers associated with the second plurality of terminals.

23. The method of claim 22 wherein the server identifier is further included in the header before the identifiers associated with the first plurality of terminals.