Architectures for clearing and settlement services between internet telephony clearinghouses

• US 20020044547A1
• Filed: 01/11/2001
• Published: 04/18/2002
• Est. Priority Date: 01/11/2000
• Status: Active Grant

• Current Assignee: Transnexus Incorporated
• Original Assignee: Transnexus Incorporated
• Inventors: Thomas, Stephen A., Dalton, James P. G. Jr.
• Granted Patent: US 6,996,093 B2
• Time in Patent Office: Days
• US Class Current: 370/356
• CPC Class Codes: H04L 12/14 Charging , metering or billing arrangements for data wireline or wireless communications
• CPC Class Codes: H04L 12/1403 Architecture for metering, charging or billing
• CPC Class Codes: H04L 12/1446 inter-operator billing
• CPC Class Codes: H04L 12/1453 Methods or systems for payment or settlement of the charges for data transmission involving significant interaction with the data transmission network
• CPC Class Codes: H04L 12/1485 Tariff-related aspects
• CPC Class Codes: H04L 12/1496 involving discounts
• CPC Class Codes: H04L 65/103 in the network
• CPC Class Codes: H04L 65/104 in the network
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1106 Call signalling protocols; H.323 and related
• CPC Class Codes: H04L 9/40 Network security protocols
• 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 15/8044 Least cost routing
• CPC Class Codes: H04M 2215/202 VoIP; Packet switched telephony
• CPC Class Codes: H04M 2215/42 Least cost routing, i.e. provision for selecting the lowest cost tariff
• CPC Class Codes: H04M 2215/46 Connection to several service providers
• CPC Class Codes: H04M 2215/745 Least cost routing, e.g. Automatic or manual, call by call or by preselection
• CPC Class Codes: H04M 7/1245 : where a network other than PSTN/ISDN interconnects two PSTN/ISDN networks
• CPC Class Codes: H04M 7/1285 : Details of finding and selecting a gateway for a particular call
• CPC Class Codes: H04Q 2213/13034 : A/D conversion, code compression/expansion
• CPC Class Codes: H04Q 2213/1313 : Metering, billing
• CPC Class Codes: H04Q 2213/13141 : Hunting for free outlet, circuit or channel
• CPC Class Codes: H04Q 2213/13176 : Common channel signaling, CCS7
• CPC Class Codes: H04Q 2213/13196 : Connection circuit/link/trunk/junction, bridge, router, gateway
• CPC Class Codes: H04Q 2213/13204 : Protocols
• CPC Class Codes: H04Q 2213/13389 : LAN, internet
• CPC Class Codes: H04Q 3/0025 : Provisions for signalling
• CPC Class Codes: H04Q 3/66 : Traffic distributors

Abstract

A system for routing voice telephone calls over IP networks as opposed to traditional switched circuit networks. The voice communications during the telephone call are packaged as digital data and access the Internet through gateways. The system supports the linking of a source gateway in a first clearinghouse to a destination gateway in a second clearinghouse. The system further supports the selection of a destination gateway based on factors such as cost, speed of routing, and transmission quality of the voice data. The components of the system are arranged so as to minimize the number of signals sent between clearinghouses in identifying the optimal destination gateway.

Claims

1. A method for routing internet telephony calls between gateways, comprising the steps of:

receiving gateway information from one or more clearinghouses;

storing the received gateway information in a database of a linking clearinghouse prior to a call;

receiving a destination gateway request from a source gateway of a first clearinghouse;

generating a list of available destination gateways of one or more second clearinghouses based upon the forwarded gateway information;

selecting a destination gateway from the list; and

completing the call between the source gateway of the first clearinghouse and the selected destination gateway of a second clearinghouse.

2. The method of claim 1, wherein the step of selecting a destination gateway further comprises the step of sorting destination gateways based upon one or more rules.

3. The method of claim 2, wherein the rules consider at least one of cost, speed, and quality of data transmission for completing a call.

4. The method of claim 2, wherein the linking clearinghouse performs the step of selecting a destination gateway from the list.

5. The method of claim 2, wherein the step of generating a list of available destination gateways further comprises the step of creating a combined routing table, the combined routing table comprises gateway information from the first clearinghouse and the one or more second clearinghouses.

6. The method of claim 2, wherein the first clearinghouse performs the step of selecting a destination gateway from the list.

7. The method of claim 6, wherein the gateway information received by the linking clearinghouse comprises destination gateway IP address information.

8. The method of claim 1, wherein the step of completing a call further comprises the step of transferring at least one of voice, fax, and video data between the source and destination gateways.

9. The method of claim 1, further comprising the step of enrolling gateways from the first and one or more second clearinghouses with the linking clearinghouse.

10. The method of claim 1, wherein the cost for routing internet telephony calls between gateways comprises:

applying a price discount to the cost for originating a call at the source gateway; and

applying a price increase to the cost for terminating a call at the termination gateway.

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

13. The system of claim 12, wherein said linking clearinghouse further comprises a sorting mechanism for selecting destination gateways.

14. The system of claim 13, wherein said sorting mechanism evaluates at least one of cost, speed, and quality of data transmission for completing a call.

15. The system of claim 12, wherein said linking clearinghouse creates a combined routing table, the table comprises gateway information from said first and second clearinghouses.

16. The system of claim 12, wherein the gateway information received by said linking clearinghouse comprises destination gateway IP address information.

17. The system of claim 12, wherein said first clearinghouse further comprises a sorting mechanism for selecting destination gateways.

18. The system of claim 17, wherein said sorting mechanism evaluates at least one of cost, speed, and quality of data transmission for completing a call.

20. The method of claim 19, further comprising the steps of:

generating a list of available destination gateways of one or more second clearinghouses based upon the forwarded gateway information; and

selecting a destination gateway from the list.

21. The method of claim 19, wherein the step of forwarding the call further comprises forwarding the call from the linking clearinghouse to the selected destination gateway of a second clearinghouse.

22. The method of claim 19, wherein the cost for routing internet telephony calls between gateways comprises:

applying a price discount to the cost of originating a call; and

applying a price increase to the cost of terminating a call.

12. A system for routing internet telephony calls between gateways, comprising:

a first clearinghouse comprising one or more gateways connected to an IP network;

a second clearinghouse comprising one or more gateways connected to an IP network; and

a linking clearinghouse connected to the first and second clearinghouse through an IP network, for receiving gateway information from said first and said second clearinghouses prior to a call, and for generating a list of available destination gateways based upon the forwarded gateway information in response to a call.

19. A method for routing internet telephony calls between gateways, comprising the steps of:

enrolling a linking clearinghouse as a destination gateway in a first clearinghouse;

initiating a call in the first clearinghouse;

receiving the call with the linking clearinghouse; and

forwarding the call from the linking clearinghouse to a destination gateway of a second clearinghouse.