Optical communications – Multiplex – Optical switching
Reexamination Certificate
2002-01-30
2009-08-18
Leung, Christina Y (Department: 2613)
Optical communications
Multiplex
Optical switching
C398S032000, C398S051000
Reexamination Certificate
active
07577358
ABSTRACT:
In the present invention, a single-frequency tone is used as addressing header for each optical packet. The frequency of the single-frequency tone is situated within the baseband of the digital payload signal and is preferably a radio-frequency tone. The single-frequency tone is multiplexed with the digital payload and modulated into an envelope of an optical carrier. The frequency is indicative of an address or out-port for the optical packet, which means that different destinations in the network correspond to different frequencies. When switching such an optical packet, the power of the frequency tone is measured. If a tone is present, the optical path corresponding to the allocation is opened by an electronic switch control, and when the tone disappears, the path is closed. Due to the narrow bandwidth of the frequency tone, any disturbance of the digital payload is essentially negligible.
REFERENCES:
patent: 5023863 (1991-06-01), Masuda
patent: 5253250 (1993-10-01), Schlafer et al.
patent: RE34676 (1994-07-01), Kuhn
patent: 5568303 (1996-10-01), Liedenbaum et al.
patent: 5612806 (1997-03-01), Su et al.
patent: 5892606 (1999-04-01), Fatehi et al.
patent: 6594049 (2003-07-01), Brinkman et al.
patent: 6600581 (2003-07-01), Fatehi et al.
patent: 6671079 (2003-12-01), Fuller et al.
patent: 6788896 (2004-09-01), Wang et al.
patent: 6819878 (2004-11-01), King et al.
patent: 6970651 (2005-11-01), Schuster et al.
patent: 7039316 (2006-05-01), Chang et al.
patent: 7142553 (2006-11-01), Ojard et al.
patent: 2001/0055136 (2001-12-01), Horiuchi et al.
patent: 2002/0015210 (2002-02-01), Fuse
patent: 2002/0074987 (2002-06-01), Hauptmann et al.
patent: 2002/0131114 (2002-09-01), Yoo
patent: 2002/0149824 (2002-10-01), Beaulieu et al.
patent: 2002/0191251 (2002-12-01), Ferguson et al.
patent: 2003/0067647 (2003-04-01), Wan et al.
patent: 2003/0090767 (2003-05-01), Yap et al.
patent: 2003/0133641 (2003-07-01), Yoo
patent: 2006/0291870 (2006-12-01), Wan et al.
patent: 2007/0133586 (2007-06-01), Ojard et al.
patent: 0 550 046 (1993-07-01), None
patent: A2001-148875 (2001-05-01), None
patent: WO 00/04668 (2000-01-01), None
S. Yao et al., Advances in Photonic Packet Switching: An Overview, IEEE Communications Magazine, Feb. 2000, pp. 84-94.
D. Blumenthal, Photonic Packets Switches: Architectures and Experimental Implementations, Proceedings of the IEEE, vol. 82, No. 11, Nov. 1994, pp. 1650-1667.
E. Park et al., Self-Routing of Wavelength Packets Using an All-Optical Wavelength Shifter and QPSK Subcarrier Routing Control Headers, IEEE Photonics Technology Letters, vol. 8, No. 7, Jul. 1996, pp. 938-940.
D. Wonglumsom et al., HORNET—A Packet-Switched WDM Network: Optical Packet Transmission and Recovery; IEEE Photonics Technology Letters, vol. 11, No. 12, Dec. 1999, pp. 1692-1694.
Translation of Japanese Official Action, Aug. 21, 2007, in corresponding Japanese Application No. 2003-565202.
Barbosa Felipe Rudge
Furtado Mario Tosi
Sachs Antonio de Campos
Ericsson Telecomunicacoes S.A.
Leung Christina Y
Nixon & Vanderhye P.C.
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