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:
Aug. 27, 2002
Filed:
Sep. 03, 1998
Geoffrey Chopping, Wimborne, GB;
Marconi Communications Limited, Coventry, GB;
Abstract
A depacketizer is used in terminating an ATM multiplexed data stream at a functional unit, virtual channel data being carried in cells in the data stream. The depacketizer has a plurality of cell buffers each storing the data contained in a single cell and being loaded in the sequence of a message sequence number carried by each cell and emptied in accordance with a depacketizer algorithm to form a data stream. A fill-in cell format generator causes, on the failure of a valid cell to arrive, the replacement of the missing cell by a fill-in cell in the data stream. A time-out function generator is started after each cell has been depacketized and sometimes after fill-in replacement cells have been generated. A cell frame aligner has the depacketizer with a frame alignment signal detector which detects a frame alignment signal in the non-continuous data stream and generates an associated frame start signal and a loss of frame alignment signal as appropriate. A frame aligner accepts the non-continuous data stream and its associated frame start signal, except in the presence of a loss of frame alignment signal and aligns the non-continuous data stream to clock and frame start signals of the functional unit.