Apparatus and method for optimal conference call renegotiation in telephony over LAN systems

• US 6,687,234 B1
• Filed: 10/05/1999
• Issued: 02/03/2004
• Est. Priority Date: 10/05/1999
• Status: Expired due to Term

• Current Assignee: Unify Inc. (Atos SE)
• Original Assignee: Siemens Information & Communication Networks, Inc. (Siemens AG)
• Inventors: Shaffer, Shmuel, Beyda, William Joseph
• Primary Examiner(s): Patel, Ajit
• Assistant Examiner(s): HO, CHUONG T
• Application Number:
  US09/412,562
• Time in Patent Office: 1,582 Days
• Field of Search: 379/202.01, 379/201-206, 379/205.01, 370/206-263, 370/200, 370/270, 370/395, 370/486, 370/352, 370/356, 370/408, 370/400-403, 370/410, 370/256-260, 370/230, 370/465, 370/252, 709/204-206, 709/223, 709/231, 709/227-229, 709/237, 709/105, 348/15
• US Class Current: 370/260
• CPC Class Codes: H04L 12/185 with management of multicast group membership
• CPC Class Codes: H04M 3/2227 Quality of service monitoring
• CPC Class Codes: H04M 3/562 where the conference facilities are distributed
• CPC Class Codes: H04M 3/567 Multimedia conference systems
• CPC Class Codes: H04M 7/00 Arrangements for interconnection between switching centres
• 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

A multipoint control unit coordinator (MCUC). The MCUC tracks all conferences in a telecommunications system and determines how they can be best configured and modified over time. The MCUC instructs multipoint control units (MCUs) to break down and reconfigure calls, if necessary. A MCUC according to an embodiment of the invention maintains a database of all the MCUs in the system, a measure of processing coding resources, and a geographical location. When two parties seek to add a third in a conference call, the MCUC determines coding resources, geographical locations, and determines the most appropriate media stream mixing location based on preferences, such as network cost or endpoint coding resources or quality. The MCUC then instructs the MCUs to handle the conference accordingly.

Claims

1. A telecommunications network, comprising:

one or more multi-point controllers configured to perform call signaling between a multi-point control unit and a plurality of client endpoints;

a multi-point control unit coordinator integrated with one of said multi-point controllers, said multi-point control unit coordinator configured to identify an optimal other one of said one or more multi-point controllers and direct said optimal one to perform multi-point control functions, wherein said multi-point control unit coordinator is configured to make an identification of a new optimal multi-point controller while a conference is ongoing and cause said conference to be redirected to said new optimal multi-point controller.

2. A telecommunications network according to claim 1, wherein said optimal one is one in which network costs are minimized for the conference.

3. A telecommunications network according to claim 1, wherein said optimal one is one which has maximum coding resources available for the conference.

4. A telecommunications network according to claim 1, wherein said optimal one is one in which network costs match predetermined criteria.

5. A telecommunications network according to claim 1, wherein said optimal one is one in which coding quality required for the conference is maximized.

6. A method for operating a telecommunications network, comprising:

receiving a multi-point conference set up request at a multi-point control unit coordinator, said multi-point control unit coordinator being integrated with a multi-point control unit;

identifying one or more multi-point controls units whose use will be optimal according to one or more criteria during said multi-point conference; and

relaying said multi-point conference set up request to said one or more multi-point control units after said optimal determination is made;

wherein said identifying and said relaying occur while said conference is ongoing to select a new optimal multi-point control unit.

7. A method according to claim 6, wherein said determining is A made while a first multi-point conference is ongoing and said multi-point conference set up command seeks to add an additional party to said first multi-point conference.

8. A method according to claim 7, further comprising said multipoint control unit coordinator transferring control of said first multi-point conference from a first of said one or more multi-point control units to a second of said one or more multi-point control units when said additional party is added and said second is more optimal than said first.

9. A method according to claim 7, wherein said identifying identifies one or more of said multi-point control units whose use will minimize coding resources.

10. A method according to claim 7, wherein said identifying identifies one or more of said multi-point control units whose use will maximize coding quality.

11. A method according to claim 7, wherein said identifying identifies one or more of said multi-point control units whose use will minimize network costs for said multi-point conference.

12. A telecommunications device, comprising:

means integrated with a multi-point control unit for identifying one or more multipoint controls units whose use will be optimal according to one or more criteria during a multi-point conference; and

means for relaying said multi-point conference set up request to said one or more multi-point control units after said optimal determination is made;

wherein said identifying and said relaying occur while said conference is ongoing to select a new optimal multi-point control unit.

13. A system according to claim 12, wherein said identifying means is operable to determine said optimal one or more multi-point control units while a first multi-point conference is ongoing and said multi-point conference set up command seeks to add an additional party to said first multi-point conference.

14. A system according to claim 13, further comprising means for transferring control of said first multi-point conference from a first of said one or more multi-point control units to a second of said one or more multi-point control units when said additional party is added and said second is more optimal than said first.

15. A system according to claim 14, wherein said identifying means identifies one or more of said multi-point control units whose use will minimize coding resources.

16. A system according to claim 14, wherein said identifying means identifies one or more of said multi-point control units whose use will maximize coding quality.

17. A system according to claim 14, wherein said identifying means identifies one or more of said multi-point control units whose use will minimize network costs for said multi-point conference.