Patent ID: 6914718
Filing Date: 2005-07-05
Classification: H04B

Abstract:
1. An optical repeating system comprising: an uplink optical transmission line; a downlink optical transmission line; an optical transmitter and an optical receiver for transmitting and receiving a main signal via at least one of the uplink and downlink optical transmission lines; and a plurality of optical amplifying repeaters each installed at an intermediate position on the optical transmission lines for amplifying and repeating the main signal with optical amplifiers, wherein said optical transmitter specifies one of said plurality of optical amplifying repeaters, and transmits a first sub-signal containing at least one of a supervisory command and a control command to said specified optical amplifying repeater, the supervisory command commanding to supervise internal circuits of said optical amplifying repeater, and the control command commanding to control amplification factors of said optical amplifiers, and wherein said optical amplifying repeater includes a controller for controlling the amplitude intensity of the supervisory signal in response to the control command, and said optical amplifying repeater transmits, when receiving the supervisory command via one of the uplink and downlink optical transmission lines, a second sub-signal to said optical receiver via said uplink optical transmission line and said downlink optical transmission line, the second sub-signal containing a supervisory signal indicating supervisory result corresponding to the supervisory command, and is controlled to change the amplification factors of said optical amplifiers in response to the control command when receiving the control command via one of said uplink and downlink optical transmission lines.