Method of intrinsic continuous management data transmission in fiber optic communications
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United States of America Patent
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Apr 2, 2002
Grant Date -
N/A
app pub date -
Nov 24, 1999
filing date -
Nov 24, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method allowing reliable routing of individual optical carriers through an optical network is disclosed. Routing information is impressed on individual carriers by a method known as subband quadrature coding (SQC). The optical carrier is modulated at a first frequency, and at a first intensity to impress application data on the carrier. The carrier is additionally modulated at a second frequency, preferably two orders of magnitude less than the first frequency, and at a second intensity less than the first intensity to impress management data on the carrier for routing the carrier through an optical communications network, from a source to a destination. According to the method, the management data is continuously impressed upon the carrier during transmission of the application data. The optical carrier is multiplexed onto the fiber optic communications line, and upon reaching a first node, the carrier is demultiplexed and an intensity sample of the carrier is detected. The management data is then separated out with a low pass filter, whereupon in response the method directs the carrier signal according to the management data.
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