Method of and system for providing quality of service in IP telephony

• US 7,136,387 B2
• Filed: 08/09/1999
• Issued: 11/14/2006
• Est. Priority Date: 08/09/1999
• Status: Expired due to Fees

• Current Assignee: Verizon Patent and Licensing Incorporated (Verizon Communications Inc.)
• Original Assignee: MCI Incorporated (Verizon Communications Inc.)
• Inventors: Donovan, Steven R., Gallant, John K.
• Primary Examiner(s): Pham, Chi
• Assistant Examiner(s): TRAN, PHUC H
• Application Number:
  US09/370,504
• Publication Number:
  US 20030133454A1
• Time in Patent Office: 2,654 Days
• Field of Search: 370/352, 370/355, 370/356, 370/358, 370/385, 370/395, 370/401, 370/465, 370/466, 370/467, 379/230
• US Class Current: 370/395.52
• 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. A method of providing quality of service in an Internet Protocol (IP) telephony session between a calling party and a called party, the method comprising:

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

assigning a second temporary session IP proxy source address for said calling party at a second device having IP capability and ATM capability;

establishing an ATM virtual circuit for said session between said first device and said second device based on the assigned first and second temporary session IP proxy addresses;

transporting IP telephony media for said session between said calling party and said first device; and

transporting IP telephony media for said session between said called party and said second device.

2. The method as claimed in claim 1, wherein said first and second devices are routers.

3. The method as claimed in claim 1, wherein said establishing an ATM virtual circuit between said first and second devices comprises:

identifying a calling party number for said session at said first device; and

identifying a called party number for said session at said second device.

4. 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 destination address to the called party at a first access control manager operatively connected with the calling party via a first IP network;

assigning a temporary IP proxy source address to the calling party at a second access control manager operatively connected with the called party via a second IP network;

establishing a switched virtual circuit for the session between the first access control manager and the second access control manager;

routing IP media traffic from said calling party to said called party IP proxy destination address at said first access control manager via the first IP network;

routing IP media traffic from said called party to said calling party IP proxy source address at said second access control manager via the second IP network;

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

5. The method as claimed in claim 4, wherein said assigning a temporary IP proxy source address to the calling party comprises selecting an IP proxy address from a pool of calling party IP proxy addresses allocated to said second access manager.

6. The method as claimed in claim 4, wherein said assigning a temporary IP proxy destination address to the called party comprises selecting an IP proxy address from a pool of called party IP proxy addresses allocated to said first access manager.

7. The method as claimed in claim 6, further comprising:

translating ATM traffic received at said temporary IP proxy destination address to IP media traffic for transport to said called party; and

translating ATM traffic received at said temporary IP proxy source address to IP media traffic for transport to said calling party.

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

a control point operatively connected to the calling party and the called party via an IP network;

a first device operatively connected to the calling party via the IP network and further operatively connected to an ATM network; and

a second device operatively connected to the called party via the IP network and further operatively connected to the ATM network,

wherein, upon receipt of a call request from the calling party, the control point dynamically assigns a proxy source IP address associated with the second device to the calling party and a proxy destination IP address associated with the first device to the calling party, and wherein the first device and the second device establish a virtual circuit through the ATM network for an IP telephony session between the calling party and the called party using the dynamically assigned proxy source IP address and the proxy destination IP address.