Traffic driven variable bandwidth optical transmission
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United States of America Patent
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Jan 7, 2014
Grant Date -
Aug 30, 2012
app pub date -
Aug 29, 2011
filing date -
May 13, 2003
priority date (Note) -
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Abstract
Link bandwidth is varied based on the subscriber traffic load. Varying the link bandwidth has the effect of varying the actual noise margin of the link (in an inverse elation), so that the noise margin will vary inversely with the traffic load. A beneficial result is that, because the noise margin is increased during “off-peak” traffic periods, rapidly varying and burst impairments can be absorbed without causing data loss. In effect, the respective probability distributions of error bursts and traffic load are separated. Data loss only becomes a significant risk when peaks in both distributions coincide. However, the probability of that event occurring is comparatively low. This enables a lower noise margin allocation during design of the link, which dramatically reduces the link cost.
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