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:
Jul. 23, 2002
Filed:
Sep. 17, 1999
Peter Leslie Higginson, Cuffley, GB;
Anthony Neil Berent, Hook, GB;
Enterasys Networks, Inc., Portsmouth, NH (US);
Abstract
A packet is originated in a unit as a data field DATA plus a CRC (cyclic redundancy check) check field CRC by a CRC circuit This packet has a header HDR (with a routing information field RIF) added to it in a unit converting it into a message for transmission through a message network. A check correction field CCF is computed by unit in unit by looking up precomputed check subfields stored with the routing subfields (the routing information field being constructed by selecting from the stored subfields), such that the CRC field is a valid CRC check field for the complete message. At the destination, unit 30 can be the final user unit, checking the entire message and extracting the data field DATA therefrom; the DATA field does not need to be checked, as the CRC field acts as a check both for the data field DATA alone and the entire message. (Alternatively, the message can be checked by a final switching unit using a standard CRC check circuit (and similarly at intermediate units ″) and the original packet can be checked by another standard CRC check circuit in the final user unit ).