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:
Jul. 27, 2004
Filed:
May. 26, 2000
Network Equipment Technologies, Inc., Fremont, CA (US);
Abstract
An apparatus and method for traffic shaping in a network switch, which provides for per-connection shaping. A Cell Descriptor (CD)-processing block and a ShapeID processing block operate to de-couple the management of the CDs from the scheduling of the CD output times. The CD-processing block outputs a token (ShapeID) to the ShapeID block. If the token is conforming, it is immediately passed back to the CD-processing block, otherwise it is processed. When the token is “mature” the token is passed back to the CD-processing block. Use of “now” and “later” lists with per-connection ShapeIDs provides priority within a virtual connection (VC) and a virtual path (VP), respectively. This effectively preserves the relative priority for connections being shaped within a VP. Also, the use of a Calendar Queue reduces the complexity of a “virtual finishing time” (VFT) calculation.