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:
Apr. 29, 2003
Filed:
Dec. 06, 1999
Applicant:
Inventor:
Naohiro Shimada, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 3/05 ; H04L 1/00 ; G06F 1/100 ;
U.S. Cl.
CPC ...
H02H 3/05 ; H04L 1/00 ; G06F 1/100 ;
Abstract
A QOS protection system can switch a current system and a reserved system depending upon degradation of quality through monitoring of arriving condition of packet to perform transmission with guarantee of QOS. The QOS protection system in a redundant system includes detection means for monitoring the packet flow and detecting at least the quality of degradation of the packet flow and switching means for performing switching between the current system and the reserved system when the detection means detects degradation of quality.