METHOD OF AND SYSTEM FOR PROVIDING QUALITY OF SERVICE IN IP TELEPHONY

• US 20070047555A1
• Filed: 10/26/2006
• Published: 03/01/2007
• Est. Priority Date: 08/09/1999
• Status: Active Grant

• Current Assignee: Verizon Patent and Licensing Incorporated (Verizon Communications Inc.)
• Original Assignee: MCI LLC (Verizon Communications Inc.)
• Inventors: Donovan, Steven, GALLANT, John
• Granted Patent: US 7,830,891 B2
• Time in Patent Office: Days
• US Class Current: 370/395.520
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 2012/5646 Cell characteristics, e.g. loss, delay, jitter, sequence integrity
• CPC Class Codes: H04L 2012/5667 IP over ATM
• CPC Class Codes: H04L 2012/5671 Support of voice
• CPC Class Codes: H04L 2012/6472 Internet
• CPC Class Codes: H04L 2012/6475 N-ISDN, Public Switched Telephone Network [PSTN]
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections

Abstract

A method and system for providing quality of service in an IP telephony session between a calling party and a called party establishes a high quality of service ATM virtual circuit for the session between first and second devices, each of the devices having ATM capability and IP capability. The first and second devices provide bidirectional translation between IP media and ATM media. The system transports IP media for the session between the calling party and the first device, and between said called party and a second device. The virtual circuit transports ATM media for the session between the first and second devices. An intelligent control layer provides IP and ATM signaling to set up the session.

Claims

1. (canceled)

2. A method of providing quality of service in an IP telephony session between a calling party and a called party, the method comprising:

assigning a temporary IP proxy address to the called party at a first access control manager, the first access control manager being configured to couple an IP network to a second network at a first access point; and

assigning a temporary IP proxy address to the calling party at a second access control manager, the second access control manager being configured to couple the IP network to the second network at a second access point.

3. The method of claim 2, wherein said assigning a temporary IP proxy address to the calling party comprises selecting an IP proxy address from a pool of IP proxy addresses allocated to said first access manager.

4. The method of claim 2, wherein said assigning a temporary IP proxy address to the called party comprises selecting an IP proxy address from a pool of IP proxy addresses allocated to said second access manager.

5. The method of claim 2, further comprising:

routing IP media traffic from said calling party to said called party IP proxy address at said first access control manager; and

routing IP media traffic from said called party to said calling party IP proxy address at said second access control manager.

6. The method of claim 5, wherein:

said second network includes an ATM network.

7. The method of claim 6, further comprising:

establishing a switched virtual connection through said ATM network between said called party IP proxy address and said calling party IP proxy address.

8. The method of claim 7, further comprising:

translating IP media traffic received at said called party IP proxy address to ATM traffic for transport through said virtual connection from said first access control manager to said second access control manager; and

translating IP media traffic received at said calling party IP proxy address to ATM traffic for transport through said virtual circuit from said second access control manager to said first access control manager.

9. A system for providing a quality of service IP telephony session between a calling party and a called party, the system comprising:

a first device connected between an IP telephony network and an ATM network, said first device providing bi-directional translation between IP media traffic and ATM traffic;

a second device connected between said IP network and said ATM network, said second device providing bi-directional translation between IP media traffic and ATM traffic; and

an intelligent control layer for establishing a virtual circuit through said ATM network for an IP telephony session between the calling party and the called party, wherein the first device and the second device are assigned on a per session basis.

10. The system of claim 9, wherein:

said first device is operably connected to an ingress switch of said ATM network; and

said second device is operably connected to an egress switch of said ATM network.

11. The system of claim 9, wherein said first and second devices each comprise a router.

12. The system of claim 9, wherein said intelligent control layer comprises:

means for assigning a temporary IP session proxy destination address for said called party at said first device; and

means for assigning a temporary IP session proxy source address for said calling party at said second device.

13. The system of claim 9, wherein the intelligent control layer comprises:

a policy server configured to enable authorization of the establishment of the virtual circuit between the first device and the second device.

14. A media service control point for enabling quality of service in internet protocol telephony, comprising:

a server configured to assign a temporary IP proxy destination address to a called party at a first access control manager, the first access control manager configured to couple an IP network to an ATM network at a first access point,

wherein the server is further configured to assign a temporary IP proxy source address to a calling party at a second access control manager, the second access control manager configured to couple the IP network to the ATM network at a second access point.

15. The media service control point of claim 14, further comprising:

an ingress media control point; and

an egress media control point,

wherein the ingress and egress media control points are configured to establish a switched virtual circuit for transmitting ATM traffic between the first access control manager and the second access control manager based on the temporary IP proxy source address and the temporary IP proxy destination address.

16. The media service control point of claim 15, wherein the ingress and egress media control points are configured to establish the switched virtual circuit manager by transmitting a quality of service request to the first and second access control managers.

17. The device of claim 14, wherein the server is a session initiation protocol (SIP) server.

18. The device of claim 14, wherein the first device and the second device are routers.

19. A method for providing QOS in a telephony system comprising:

receiving a call request from a calling party designating a called party;

assigning a temporary IP proxy address to the called party at a first access control manager, the first access control manager being configured to couple an IP network to a second network at a first access point;

assigning a temporary IP proxy address to the calling party at a second access control manager, the second access control manager being configured to couple the IP network to the second network at a second access point; and

exchanging call media between the first access control manager and the second access control manager via the second network based on the assigned temporary IP proxy addresses.

20. The method of claim 19, further comprising:

exchanging call media between the calling party and the first access control manager via the IP network based on the temporary IP proxy address assigned to the called party; and

exchanging call media between the second access control manager and the called party via the IP network based on the temporary IP proxy address assigned to the calling party.

21. The method of claim 19, further comprising:

establishing a virtual circuit in the second network between the first access control manager and the second access control manager.