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. 02, 2002
Filed:
Dec. 17, 1999
Andre Szczepanek, Hartwell, GB;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
The present invention includes an improved switching device ( ) which operates in a shared media environment. The switching device ( ) in accordance with the present invention includes a tag header processing means ( ) operable to insert a tag header into frames that enter the switching device ( ) without a tag header and CRC processing means ( ) operable to calculate a CRC for the frame excluding the tag header for use while the frame is being processed within the switching device ( ). The tag header processing means ( ) is further operable, when the internal switch processing of the frame is completed and the frame is ready to be transmitted, to determine whether or not the frame should be transmitted without a tag header and removing the tag header if it is not. The CRC processing means ( ) is further operable to calculate a CRC for the frame when the internal processing of the frame is completed and, if the frame was originally received with a tag header, to corrupt the CRC if needed based on parity bits included in the tag header when the frame was received.