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:
Jun. 17, 2008
Filed:
Jan. 22, 2003
Mikael Latvala, Helsinki, FI;
Mikael Latvala, Helsinki, FI;
Nokia Corporation, Espoo, FI;
Abstract
The present invention describes a method, system and mirror driver for discarding data frames in mirrored data communication networks. In the method, at least one data structure comprising one or more entries is created and maintained, an entry comprising at least a current sender data frame sequence number. When a data frame is received, a hash code is computed using then sender address and the receiver address of the received data frame, the hash code being an index to the table. The current sender data frame sequence number is checked in the entry indexed by the computed hash code, and if the sequence number of the received frame is smaller than the current sender data frame sequence number in the entry, the data frame is discarded as being a duplicate frame.