SONET/SDH frame synchronization in the presence of high bit error rates
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Feb 23, 2006
app pub date -
Aug 23, 2004
filing date -
Aug 23, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A SONET/SDH frame synchronization method uses one framing pattern to find the frame and a second framing pattern to monitor the frame after it is acquired. The first framing pattern uses twenty-four bits selected from the A1 and A2 bytes. After acquisition, the second framing, pattern uses only twelve bits, e.g. the last four bits of the last A1 byte and all of the first A2 byte. The framing pattern comparisons are made with a window of N+1 bytes or 2N bytes. The method of the invention meets the requirements of Telcordia GR-253 and eliminates aliasing in the last H2 bytes. The method can also be applied to enhanced framing in STS-192 and STS-768. An exemplary implementation of the method is realized in a state machine.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully