Clearinghouse server for internet telephony and multimedia communications

• US 7,017,050 B2
• Filed: 09/11/2001
• Issued: 03/21/2006
• Est. Priority Date: 09/11/2000
• Status: Expired due to Term

• Current Assignee: Transnexus Incorporated
• Original Assignee: Transnexus Incorporated
• Inventors: Thomas, Stephen Anthony, Isakbayev, Dmitry, Dalton, James P G Jr.
• Primary Examiner(s): Darrow, Justin T.
• Assistant Examiner(s): PERUNGAVOOR, VENKATANARAY
• Application Number:
  US09/952,938
• Publication Number:
  US 20020112187A1
• Time in Patent Office: 1,652 Days
• Field of Search: 713/163, 713/157, 713/160, 713/168, 713/201, 713/200
• US Class Current: 726/5
• CPC Class Codes: H04L 63/0823 using certificates cryptographic mechanisms or cryptographic arrangements for entity authentication involving certificates H04L9/3263
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/401 wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference
• CPC Class Codes: H04M 15/00 Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
• CPC Class Codes: H04M 15/49 Connection to several service providers
• CPC Class Codes: H04M 15/56 for VoIP communications
• CPC Class Codes: H04M 2215/202 VoIP; Packet switched telephony
• CPC Class Codes: H04M 2215/46 Connection to several service providers
• CPC Class Codes: H04M 3/38 Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections queuing arrangements H04Q3/64
• CPC Class Codes: H04M 3/382 using authorisation codes or passwords
• 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 clearinghouse server for routing multi-media communications, including telephony calls, between a source device and a destination device via a distributed computer network, such as the global Internet. The clearinghouse server can authorize the completion of a communication from a source device to a destination device and collect usage-related information for the completed communication. In response to an authorization request issued by an enrolled source device, the clearinghouse server can identify one or more available destination devices available to accept a communication from an authorized source device. The clearinghouse server can provide a list of the identified destination devices, typically organized in a rank order, by sending an authorization response to the source device. In turn, the source device can use this list to select a destination device and contact that selected device via the computer network to complete the communication.

Claims

1. A method for authorizing and routing a telephone communication with a clearinghouse server between a source Voice over Internet Protocol (VoIP) device and a destination VoIP device, comprising the steps of:

assigning one or more source VoIP devices to a group;

receiving an authorization request from a source VoIP device;

determining if the source VoIP device is assigned to the group;

determining a communication route for completing a communication originating at the source VoIP device;

identifying one or more destination VoIP devices available to complete the telephone communication based on the group in which the source VoIP device is assigned;

balancing use of the one or more destination VoIP devices with the clearinghouse server by;

(a) ranking the one or more destination VoIP devices available to complete the telephone communication according to weight values assigned to a respective VoIP by the clearinghouse server and according to a random number scheme executed by the clearinghouse server;

(b) generating a list comprising the ranked destination VoIP devices;

(c) generating an authorization token and a transaction identifier for each identified destination VoIP device;

(d) forwarding the authorization tokens, transaction identifiers, and list to the source VoIP device;

selecting a destination VoIP device front the list; and

completing the telephone communication with the selected destination VoIP device.

2. The method of claim 1, wherein the random number scheme comprises the steps of:

summing first weight values assigned to the identified destination VoIP devices;

assigning a second weight value to each identified destination VoIP device;

generating a random number between zero and the sum of the first weight values; and

ordering each identified destination VoIP device based upon the proximity of the random number to the second weight value.

3. The method of claim 1, further comprising the step of creating a call detail record.

4. The method of claim 3, wherein the step of creating a call detail record further comprises the step of storing one of a transaction identifier, the identified destination VoIP devices, tokens corresponding to each identified destination VoIP device, a source group number assigned to the source VoIP device, a destination group number corresponding to each destination VoIP device, calling party identity, called number, maximum authorized call length, a time-date stamp, and a server identification number.

5. The method of claim 1, further comprising the step of extracting communication information from the authorization request.

6. The method of claim 5, wherein the step of extracting communication information further comprises the steps of extracting one of a source VoIP device identity, dialed number, and call identifier from the authorization request.

7. The method of claim 1, further comprising the step of determining if the source VoIP device is enrolled with a clearinghouse server.

8. The method of claim 1, where the ordering of destination VoIP devices is based first on destination group and second on VoIP device.

9. The method of claim 8 where the number of VoIP devices in a destination group identified as destination VoIP devices may be truncated.

10. The method of claim 8 where destination VoIP devices suggested by the source VoIP device can be combined with destination VoIP devices identified by the clearinghouse server.

11. The method of claim 8 where destination VoIP devices suggested by the source VoIP device are ranked ahead of VoIP devices identified by the clearinghouse server.

12. A computer readable medium having computer executable instructions for performing the steps recited in claim 1.

16. The method of claim 1 where source VoIP devices are assigned to source groups and destination VoIP devices are assigned to VoIP device groups for the purpose of determining authorization and routing of traffic between source and destination VoIP devices.

17. The method of claim 1, for authorizing and routing communication between a source VoIP device and destination VoIP device enrolled with different clearinghouses, defined be the steps comprising:

assigning a VoIP device of an external clearinghouse to a source group and destination groups;

assigning an external clearinghouse server as a source VoIP device and a destination VoIP device;

determining if the destination group is an external clearinghouse;

sending an authorization request to an external clearinghouse;

obtaining a list of destination VoIP devices, authorization tokens and transaction identifiers from an external clearinghouse;

preparing an authorization response with a list destination VoIP devices, authorization tokens and transaction identifiers from an external clearinghouse to a source VoIP device in an authorization response;

sending an authorization response from an external destination clearinghouse to a source VoIP device;

reporting usage indication between clearinghouse VoIP devices;

confirming receipt of usage indication between clearinghouse VoIP devices.

18. The method of claim 17 where an external clearinghouse VoIP device may be assigned to a source group or destination group in a clearinghouse server.

19. The method of claim 17 where an external clearinghouse VoIP device may be enrolled and assigned as a source VoIP device or destination VoIP device with clearinghouse server comprising of the steps:

receiving an enrollment request from a VoIP device;

creating a public key certification;

sending the public key certificate to the VoIP device;

establishing secure communications with the VoIP device based upon the public key certificate;

receiving information from the VoIP device;

creating a configuration file comprising weighting factors for balancing communication loads.

20. The method of claim 17 where a clearinghouse VoIP device may send an authorization request to an external clearinghouse requesting identification and authorization to use destination VoIP devices.

21. The method of claim 17 where the authorization token from the destination clearinghouse server is packaged in the authorization response from the source clearinghouse server to the source VoIP device.

22. The method of claim 17 where the transaction identifier generated from the destination clearinghouse VoIP device is combined with the transaction identifier of the source clearinghouse to create a unique transaction identifier including information that identifies both source and destination clearinghouse.

23. The method of claim 17 where the transaction identifier, provided in the usage indication message, can be used to identity if and how the usage indication message should be forwarded to another clearinghouse VoIP device.

24. The method of claim 17 where the transaction identifier generated by a destination clearinghouse VoIP device can be modified by each successive clearinghouse VoIP device to create a unique transaction identifier delivered to the source VoIP device that identifies all clearinghouses in the chain of authorization.

25. The method of claim 17, further comprising the step of creating a call detail record.

26. The method of claim 17 wherein the step of creating a call detail record further comprises the step of storing the transaction identifier from the destination clearinghouse VoIP device, the transaction identifier created by the source clearinghouse engine, the identified destination VoIP devices, tokens corresponding to each identified destination VoIP device, a source group number assigned to the source VoIP device, a destination group number corresponding to each destination VoIP device, a number identifying the destination clearinghouse and server, a time-date stamp, and a server identification number of the source clearinghouse.

27. The method of claim 1 where the step to create an authorization token is modified by adding and, or translating information about a destination VoIP device before creating the authorization token.

13. A method for enrolling a Voice over Internet Protocol (VoIP) device for operation with a VoIP clearinghouse server, comprising the steps of:

receiving an enrollment request from a VoIP device;

creating a public key certificate;

sending the public key certificate to the VoIP device;

establishing secure communications with the VoIP device based upon the public key certificate;

receiving information from the VoIP device;

creating a configuration file assigned to the VoIP device and accessible by the VoIP clearinghouse server, the configuration file comprising weighting factors for balancing telephone communication loads in a random manner by the VoIP clearinghouse server.

14. The method of claim 13, wherein the step of receiving an enrollment request further comprises the step of receiving public key from the VoIP device.

15. The method of claim 13, wherein the step of creating the configuration file further comprises creating the configuration file comprising one of software license keys, cryptographic keys, enable and disable enrollment flags, routing information, call detail record flags, secure socket layer flags, group information, and VoIP device information.