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:
Dec. 06, 2011
Filed:
Oct. 15, 2009
Frank R Dropps, Maple Grove, MN (US);
Ernest G Kohlwey, Eagan, MN (US);
Edward C. Ross, Edina, MN (US);
Mark A. Owen, Apple Valley, MN (US);
Frank R Dropps, Maple Grove, MN (US);
Ernest G Kohlwey, Eagan, MN (US);
Edward C. Ross, Edina, MN (US);
Mark A. Owen, Apple Valley, MN (US);
QLOGIC, Corporation, Aliso Viejo, CA (US);
Abstract
A method and system for distributing credit using a fiber channel switch element is provided. The switch element includes, a wait threshold counter that is used to set up a status for a port that has to wait for certain duration to send a frame due to lack of buffer to buffer credit; a credit module that controls buffer to buffer credit for a transmit segment of the fiber channel switch element; and a virtual lane credit module with a counter that is incremented every time a frame assigned to a virtual lane is sent and decreased every time a VC_RDY is received. The method includes, determining if a VC_RDY primitive is received; and allocating credit to a virtual lane that is not at its maximum credit, after the VC_RDY primitive is received.