Architecture to support public voice VPN services over an IP network

• US 7,533,410 B1
• Filed: 09/06/2001
• Issued: 05/12/2009
• Est. Priority Date: 09/06/2001
• Status: Expired due to Fees

• Current Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: Wu, Fang, Wunderlich, Eberhard F., Fung, Kwok T., Ko, Denny, Sam, Emmanuel K.
• Primary Examiner(s): Zand; Kambiz
• Assistant Examiner(s): Tran; Tongoc
• Application Number:
  US09/948,268
• Time in Patent Office: 2,805 Days
• Field of Search: 726/14, 726/15, 713/150, 713/153, 379/900, 379/901, 370/351
• US Class Current: 726/15
• CPC Class Codes: H04L 63/0272 Virtual private networks
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• 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
• CPC Class Codes: Y10S 379/90 Internet, e.g. Internet phone, webphone, internet-based telephony
• CPC Class Codes: Y10S 379/901 Virtual networks or virtual private networks

Abstract

The presently disclosed architecture enables a service provider to support public voice VPN services over an IP VPN network. The architecture utilizes a customer VPN, a designated gateway for the customer VPN, an IP VPN transport network, and a Call Control Element/router Complex which uses IP technology to map between the IP VPN and the voice VPN. With such an arrangement, the customer VPN is extended to the gatekeeper of the Call Control Element/router Complex, thereby enabling the provision of voice VPN services over an IP network.

Claims

1. A method for enabling a telecommunications carrier to provide Virtual Private Network (VPN) services over an Internet Protocol (IP) VPN Network, comprising the steps of:

receiving a call in a VPN network that originated from a customer VPN;

routing the call to a gatekeeper along with an autonomous system (AS) number that uniquely identifies the customer VPN; and

mapping at the gatekeeper the AS into a connection group to facilitate routing of the call to its destination.

2. The method of claim 1 wherein said step of receiving is done through an IP subnet.

3. The method of claim 1 wherein said step of routing is done through a permanent virtual circuit (PVC).

4. The method of claim 1 wherein said step of routing is performed using an IP tunneling protocol.

5. The method of claim 1 wherein said step of mapping is done to a per-VPN management information base (MIB).

6. The method of claim 1 wherein said IP VPN network is selected from a group comprising of:

MPLS over frame relay, ATM, and an IP network with DifffServ.

7. The method of claim 1 wherein said VPN services are selected from a group comprising of:

H.323, SIP, xGCP, and H.248.

8. The method of claim 4 wherein said IP tunneling protocol comprises L2TP.