The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 2009
Filed:
Apr. 27, 2006
Thomas A. Liebert, Middletown, NJ (US);
Steven M. Michelson, Freehold, NJ (US);
Thomas A. Liebert, Middletown, NJ (US);
Steven M. Michelson, Freehold, NJ (US);
AT&T Corp, New York, NY (US);
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.