Optical communications – Diagnostic testing – Determination of communication parameter
Reexamination Certificate
2007-10-16
2007-10-16
Li, Shi K (Department: 2613)
Optical communications
Diagnostic testing
Determination of communication parameter
C380S256000
Reexamination Certificate
active
10350338
ABSTRACT:
Systems and methods for actively monitoring and managing the integrity of an optical fiber communications link. The optical fiber link integrity is monitored to guard against intrusions and other security breaches. In one embodiment, a local and a remote active monitoring system are coupled by four fiber paths that provide primary and back-up transmit and receive paths between communication equipment. In one embodiment, a security light signal is transmitted using a secondary wavelength that differs from the wavelength used to transmit a user data light signal and travels in an opposite direction relative to the user data light signal. An active monitoring system monitors both administrative information contained within the security light signal and the intensity of the security light signal to manage the integrity of the fiber optic link. Methods are provided to characterize events impacting the fiber optic link integrity.
REFERENCES:
patent: 4435850 (1984-03-01), Bowen et al.
patent: 4961644 (1990-10-01), Marsden
patent: 4973169 (1990-11-01), Slonecker
patent: 5485296 (1996-01-01), Healey et al.
patent: 5864625 (1999-01-01), Rutledge
patent: 6178025 (2001-01-01), Hardcastle et al.
patent: 6192361 (2001-02-01), Huang
patent: 6265971 (2001-07-01), Maier, Jr. et al.
patent: 6347374 (2002-02-01), Drake et al.
patent: 6442694 (2002-08-01), Bergman et al.
patent: 6484261 (2002-11-01), Wiegel
patent: 6530087 (2003-03-01), Kobayashi et al.
patent: 6603112 (2003-08-01), Medard et al.
patent: 6650840 (2003-11-01), Feldman
patent: 6654784 (2003-11-01), Wei
patent: 6728380 (2004-04-01), Zhu et al.
patent: 6816680 (2004-11-01), Purse et al.
patent: 6836586 (2004-12-01), Ueno
patent: 2 287 596 (1995-09-01), None
patent: 2 332 317 (1999-06-01), None
“Multiwavelength Optical Networks: A Layered Approach” by Stern et al., Prentice-Hall, May 1999, pp. 607-654.
“Principles of Communications” Third Edition by R. Ziemer et al., Houghton Mifflin, 1990, pp. 676-738.
D. Harrington, et al., An architecture for Describing SNMP Management Frameworks, RFC 2217, The Internet Society, Jan. 1998, title page and electronically paginated Nos. 1-56.
Supplementary Partial European Search Report for EP 03 71 6173, Dated May 2, 2006, 4 pages.
Supplementary European Search Report for EP 03 71 6173, Dated Oct. 24, 2006, 4 pages.
Medard, M. et al., “Attack Detection in All-Optical Networks,” OFC '98 Technical Digest, Feb. 1998, pp. 272-273.
Medard, M. et al., “Secure Optical Communications,” IEEE Lasers and Electro-Optics Society Annual Meeting, Dec. 1-4, 1998, pp. 323-324.
Medard, M. et al., “Security Issues in All-Optical Networks,” IEEE Network, vol. 11, Issue 3, May/Jun. 1997, pp. 42-48.
Munno, C. J. et al., “Tamper Detection of Fiber Optic Links Via Modulation Transfer Function Characterization,” 28thAnnual 1994 International Camahan Security Technology, Proceedings, IEEE, 1994, pp. 112-119.
Cohen Michael S.
Downs Richard Charles
Matz Bret Allen
Li Shi K
NeSTRONIX, Inc.
Sterne Kessler Goldstein & Fox P.L.L.C.
LandOfFree
Systems and methods for active monitoring and management of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Systems and methods for active monitoring and management of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems and methods for active monitoring and management of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3866938