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:
Mar. 25, 2008
Filed:
Aug. 23, 2004
Daniel C. Upp, Southbury, CT (US);
Suvhasis Mukhopadhyay, Shrewsbury, MA (US);
Bart Brosens, Oelegem, BE;
Kris Van Aken, Kessel-Lo, BE;
Chitra Wadhwa, Sonepat, IN;
Sachin Mathur, Bangalore, IN;
Ramses Valvekens, Herent, BE;
Daniel C. Upp, Southbury, CT (US);
Suvhasis Mukhopadhyay, Shrewsbury, MA (US);
Bart Brosens, Oelegem, BE;
Kris Van Aken, Kessel-Lo, BE;
Chitra Wadhwa, Sonepat, IN;
Sachin Mathur, Bangalore, IN;
Ramses Valvekens, Herent, BE;
Transwitch Corporation, Shelton, CT (US);
Abstract
Methods for retiming SONET signals include demultiplexing STS-1 signals from an STS-N signal, buffering each of the STS-1 signals in a FIFO, determining the FIFO depth over time, and determining a pointer leak rate based in part on FIFO depth and also based on the rate of received pointer movements. According to the presently preferred embodiment, each FIFO is 29 bytes deep. If FIFO depth is 12-17 bytes, no leaking is performed. If the depth is 8-12 bytes or 17-21 bytes, a slow leak rate is set. If the depth is 4-8 bytes or 21-25 bytes, a fast leak rate is set. If the depth is 0-4 bytes or 25-29 bytes, pointer movements are immediate. The calculated leak rates are based on the net number of pointer movements (magnitude of positive and negative movements summed) received during a sliding window of n×32 seconds (n×256,000 frames).