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:
Jun. 03, 2003
Filed:
Jul. 06, 1999
Norman W. Petty, Boulder, CO (US);
Avaya Technology Corp., Basking Ridge, NJ (US);
Abstract
A traffic shaper ( ) accommodates F5 maintenance cells of an ATM constant bit rate (CBR) virtual circuit without causing jitter or delay of the CBR traffic cells. Each virtual circuit is allocated two queues: a first queue ( ) for enqueuing CBR traffic cells and a second queue ( ) for enqueuing maintenance cells. Each virtual circuit is allocated twice its normal bandwidth on the transmission medium ( ). A dequeue state machine ( ) transmits contents of each first queue at twice the normal transmission rate during one half of each normal transmission interval of the queue's corresponding virtual circuit, and transmits contents of each second queue at twice the normal transmission rate during the other half of each normal transmission interval of the queue's corresponding virtual circuit. F5 cell transmissions are thus locked half-way between, and 180° out of phase with, transmissions of sequential CBR traffic cells, and consequently introduce no jitter or delay, at the expense of allocated bandwidth.