Technique for monitoring SONET signal

Details Technique for monitoring SONET signal Technique for monitoring SONET signal

2005-05-24

2005-05-24

Knight, Anthony (Department: 2121)

Multiplex communications

Wide area network

Packet switching

C370S903000, C370S469000, C700S055000, C710S062000, C359S308000, C398S021000, C398S043000, C398S051000, C398S058000, C398S071000, C708S300000, C708S309000, C708S311000, C708S312000, C708S317000

Reexamination Certificate

active

06898214

ABSTRACT:
A technique for performance-monitoring of a standard SONET signal involves first converting the optical signal to an electrical signal, removing in the framing signal time slot the framing signal for leaving only the framing signal noise in such time slot, and separating the framing signal noise from the data signal for viewing as a measure of the quality of the SONET signal.

REFERENCES:
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patent: 6075628 (2000-06-01), Fisher et al.
patent: 6334219 (2001-12-01), Hill et al.
D. T. Kong, “2.488 Gb/s SONET Multiplexer/Demultiplexer With Frame Detection Capability”,IEEE Journal on Selected Areas in Communications, vol. 9, No. 5, pp 726-732 (Jun. 1991).
G. Cariolaro et al., “Signal Theory For SONET STM-1”,SBT/IEEE International Telecommunications Symposium, Its '90 Symposium Record, Rio De Janeiro, Brazil, Sep. 3-6, 1990, pp 26-32.
X. A. Shen et al., “Optical Header Recognition By Spectroholographic Filtering”,Optics Letters, vol. 20, No. 24, pp 2508-2510 (Dec. 15, 1995).
W. Yang et al., SONET Framing Recognition Using Modulation Domain Analysis,IEEE Photonics Technology Letters, vol. 13, No. 10, pp 1127-1129 (Oct. 2001).
W. Yang et al., “Radio-Frequency Spectral Analysis for SONET Framing Recognition and Performance Monitoring”,Journal of Optical Networking, vol. 1, No. 2, pp 74-79 (Feb. 2002).

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