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:
Nov. 19, 2002
Filed:
Apr. 19, 2001
Naohiro Shimada, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a node ( ) which is for use in an ATM (asynchronous transfer mode) network and which is supplied with user cells, the node includes a failure detecting section ( ) for detecting a failure which is occurred in the ATM network such that no user cell is supplied to the node. The node further includes a band detecting section ( ) for detecting, as a detected band, a transmission path band used in transferring the user cells immediately before occurrence of the failure. Connected to the failure detecting section and the band detecting section, a producing section ( ) produces, when the failure detecting means detects the failure, OAM (Operation: Administration and Maintenance) cells at a production rate increased within a range such that the detected band is not exceeded. The OAM cells are for use in transferring information indicative of occurrence of the failure.