Conference calling system

• US 5,408,526 A
• Filed: 10/29/1992
• Issued: 04/18/1995
• Est. Priority Date: 10/29/1992
• Status: Expired due to Term

• Current Assignee: AT&T IPM Corp. (AT&T, Inc.)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: McFarland, James R., Peng, Kuang wei
• Primary Examiner(s): Dwyer, James L.
• Assistant Examiner(s): Wolinsky, Scott
• Application Number:
  US07/968,026
• Time in Patent Office: 901 Days
• Field of Search: 370/62, 370/94, 379/112, 379/91, 379/113, 379/114, 379/202, 379/203, 379/204, 379/205, 379/206, 379/207, 379/220, 379/221, 379/257, 379/279, 379/131
• US Class Current: 379/202.01
• CPC Class Codes: H04M 15/8044 Least cost routing
• CPC Class Codes: H04M 2215/42 Least cost routing, i.e. provision for selecting the lowest cost tariff
• CPC Class Codes: H04M 2215/745 Least cost routing, e.g. Automatic or manual, call by call or by preselection
• CPC Class Codes: H04M 3/493 Interactive information services, e.g. directory enquiries ; Arrangements therefor, e.g. interactive voice response [IVR] systems or voice portals
• CPC Class Codes: H04M 3/56 Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities video conference systems H04N7/15

Abstract

The initiator of a conference call provides conference requirements such as number and location of parties to be conferenced, time for beginning and end of conference, and telecommunications facilities requirements (e.g., bandwidth requirements for video and multi-media calls), to a conference optimization system (COS). The COS compares the requirements with information in a database, including (a) the cost for each of the paths/routes at the desired time for the conference, (b) available network paths/routes, taking into account the required bandwidth and quality of transmission, and (c) capabilities of the terminal equipment available to the participants. The COS uses a processor such as a microprocessor to identify available network paths/routes for the conference (advantageously with real time input from telecommunications network operations and maintenance systems), select the most cost effective means for initiating the conference, and send information, such as an announcement, to the parties involved in the conference, indicative of the route/path selection. The information required for conference initiation may be provided to a network call controller in order to actually set up the conference without further intervention by the participants.

Claims

1. A method of setting up a conference call between a plurality of participants at geographically dispersed locations, comprising the steps of:

obtaining information identifying each of said locations;

retrieving information from a database specifying the cost of communications originating from each of said locations;

computing, using said retrieved information, the cost of routing communications between each of said locations and other ones of said locations; and

selecting a routing arrangement for said conference as a function of said computed cost information.

2. The invention defined in claim 1 where said retrieving step includes, for each pair of locations, retrieving information indicating the cost of calling from the first location in said pair of locations to the second one of the locations in said pair of locations, and the cost of calling from the second location in said pair of locations to the first one of the location in said pair of locations.

3. The method defined in claim 1 further including the step of storing information in a database indicative of the rates per unit time applied to communications originated from each of said locations.

4. The method defined in claim 1 wherein said information obtaining step includes querying at least one of said participants for information describing each of said locations by playing an announcement to said at least one participant.

5. The method defined in claim 4 further including the step of providing information, including an announcement, to said at least one participant indicative of said least cost routing arrangement for said conference.

6. The method defined in claim 1 wherein the method further includes providing information required for conference initiation to a network call controller in order to set up the conference without further input from said at least one participant.

7. The method defined in claim 1 wherein said information obtaining step includes obtaining information relating to telecommunications requirements for said conference.

8. Apparatus for setting up a conference call between a plurality of participants at geographically dispersed locations, comprising:

means for obtaining information identifying each of said locations;

means for retrieving information from a database specifying the cost of communications originating from each of said locations;

means for computing, using said retrieved information, the cost of routing communications between each of said locations and other ones of said locations; and

means for selecting a routing arrangement for said conference as a function of said computed cost information.

9. The invention defined in claim 8 where said retrieving means is arranged to retrieve, for each pair of locations, information indicating the cost of calling from the first location in said pair of locations to the second one of the locations in said pair of locations, and the cost of calling from the second location in said pair of locations to the first one of the location in said pair of locations.

10. The invention defined in claim 8 further including means for storing information in a database indicative of the rates per unit time applied to communications originated from each of said locations.

11. The invention defined in claim 8 wherein said information obtaining means includes means for querying at least one of said participants for information describing each of said locations by playing an announcement to said at least one participant.

12. The method defined in claim 11 further including means for providing information, including an announcement, to said at least one participant indicative of said least cost routing arrangement for said conference.

13. The invention defined in claim 8 further including means for providing information required for conference initiation to a network call controller in order to set up the conference without further input from said at least one participant.

14. The invention defined in claim 8 wherein said information obtaining means includes means for obtaining information relating to telecommunications 3 requirements for said conference.