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:
Sep. 23, 2014
Filed:
Jun. 21, 2011
Ozair Usmani, San Jose, CA (US);
Ozair Usmani, San Jose, CA (US);
Netlogic Microsystems, Inc., Irvine, CA (US);
Abstract
A guaranteed rate port scheduler (GRPS) is used for serving multiple destination ports simultaneously without under-runs, even if the total bandwidth of the ports is more than the bandwidth capability of the device. Certain network protocols, such as Ethernet, do not allow 'gaps' (called under-runs) to occur between bits of a packet on the wire. If a network device is transmitting packets to several such ports at the same time and the combined bandwidth of these ports is more than the device can source, under-runs begin to occur within the transmitted packets. The disclosed GRPS solves this problem by: (a) the GRPS serves only as many destination ports at a given time as can be 'handled', and (b) the GRPS fairly selects new destination ports to serve after every end-of-frame data packet transmission by effectively “de-rating” the statistical bandwidth of each destination port in proportion to the diminished capacity of the device.