Steven B Michelson

US Patent:

7080248, Jul 18, 2006

Filed:

Apr 23, 2001

Appl. No.:

09/840492

Inventors:

Thomas A. Liebert - Middletown NJ, US
Steven M. Michelson - Freehold NJ, US

Assignee:

AT&T Corp. - New York NY

International Classification:

H04L 9/00

US Classification:

713151, 713153, 380255, 380257, 370351, 370349, 709227, 4554521, 4554522, 379 8817

Abstract:

A system of Quality of Service signaling in an IP cable telephony system includes encrypting Quality of Service signals and sending them, instead of directly from an Internet Protocol Digital Terminal to a Cable Modem Termination System, indirectly via Broadband Telephony Interface serving a telephony device. The Broadband Telephony Interface, which lacks the encryption and decryption keys, includes the encrypted Quality of Service signaling message in a signaling message it transmits to the Cable Modem Termination System when requesting a change in access to network resources. The Cable Modem Termination System attempts to decrypt the Quality of Service signaling message; and it controls access to network resources in accordance with the contents of the Quality of Service signaling message if it is able to decrypt it. This system reduces the number of signaling messages and network resources needed for call processing while providing security against denial-of-service attacks.

US Patent:

7623664, Nov 24, 2009

Filed:

Apr 27, 2006

Appl. No.:

11/412646

Inventors:

Thomas A. Liebert - Middletown NJ, US
Steven M. Michelson - Freehold NJ, US

Assignee:

AT&T Corp - New York NY

International Classification:

H04K 1/00

US Classification:

380257

Abstract:

A system of Quality of Service signaling in an IP cable telephony system includes encrypting Quality of Service signals and sending them, instead of directly from an Internet Protocol Digital Terminal to a Cable Modem Termination System, indirectly via Broadband Telephony Interface serving a telephony device. The Broadband Telephony Interface, which lacks the encryption and decryption keys, includes the encrypted Quality of Service signaling message in a signaling message it transits to the Cable Modem Termination System when requesting a change in access to network resources. The Cable Modem Termination System attempts to decrypt the Quality of Service signaling message; and it controls access to network resources in accordance with the contents of the Quality of Service signaling message if it is able to decrypt it. This system reduces the number of signaling messages and network resources needed for call processing while providing security against denial-of-service attacks.

US Patent:

8204223, Jun 19, 2012

Filed:

Oct 20, 2009

Appl. No.:

12/589232

Inventors:

Thomas A. Liebert - Middletown NJ, US
Steven M. Michelson - Freehold NJ, US

Assignee:

AT&T Intellectual Property II, L.P. - Atlanta GA

International Classification:

H04K 1/00

US Classification:

380257

Abstract:

A system of Quality of Service signaling in an IP cable telephony system includes encrypting Quality of Service signals and sending them, instead of directly from an Internet Protocol Digital Terminal to a Cable Modem Termination System, indirectly via Broadband Telephony Interface serving a telephony device. The Broadband Telephony Interface, which lacks the encryption and decryption keys, includes the encrypted Quality of Service signaling message in a signaling message it transmits to the Cable Modem Termination System when requesting a change in access to network resources. The Cable Modem Termination System attempts to decrypt the Quality of Service signaling message; and it controls access to network resources in accordance with the contents of the Quality of Service signaling message if it is able to decrypt it. This system reduces the number of signaling messages and network resources needed for call processing while providing security against denial-of-service attacks.