Optical switching unit and control method for same

Details Optical switching unit and control method for same Optical switching unit and control method for same

1996-12-12

1998-09-22

Chin, Wellington

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359127, 359128, 359139, 359143, 359177, 370278, 370250, 370247, H04B 1012, H04B 1024

Patent

active

058122907

ABSTRACT:
The present invention provides means by which a switch controller that manages lines directly notifies receivers of ineffectiveness of received data upon line disconnection instead of any transmitter indirectly notifying receivers; and according to the invention, an optical transmitter is provided within the optical switching unit, and a switch controller controls the optical transmitter within the optical switching unit and an optical switch having at its input ports one or more dummy ports capable of multicast-transmission. According to this control, upon line disconnection, receivers are connected to the optical transmitter within the optical switching unit that transmits control code in real time, thereby preventing receivers from receiving ineffective data and obviating superfluous signal lines and communication processes between the switch controller and transmitters.

REFERENCES:
patent: 4156799 (1979-05-01), Cave
patent: 5303236 (1994-04-01), Kunimoto
patent: 5517494 (1996-05-01), Green
patent: 5568479 (1996-10-01), Watanabe et al.
Fiber Channel Physical and Signaling Interface (FC-PH) in ANSI X3 T11, Rev.4.3, 1994, pp. 19-20, Jun. 1, 1994.

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