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. 02, 2009
Filed:
Jun. 02, 2004
Ian Gordon Barrett, Saskatchewan, CA;
Gregory J. Erker, Saskatoon, CA;
Michael James Smith, Saskatoon, CA;
Scott Arthur Muma, Saskatoon, CA;
Jeffrey S. Roe, Saskatoon, CA;
Bernard Guay, Vancouver, CA;
Ian Gordon Barrett, Saskatchewan, CA;
Gregory J. Erker, Saskatoon, CA;
Michael James Smith, Saskatoon, CA;
Scott Arthur Muma, Saskatoon, CA;
Jeffrey S. Roe, Saskatoon, CA;
Bernard Guay, Vancouver, CA;
PMC-Sierra, Inc., Santa Clara, CA (US);
Abstract
A data detection system includes, in part, a CID detector, a DC balance monitor and a transition density detector. The CID detector is configured to detect whether the received data stream includes a CID exceeding a predetermined threshold count. The DC balance monitor is configured to detect DC imbalances in the incoming data and that may be indicative of errors in the data. The transition density detector is configured to detect whether a minimum transition density exists during a given time period. If a violation is detected by any one of these three detectors, an out-of-frame signal is asserted. The incoming data stream may be a scrambled SONET or SDH data stream.