JPH02170734A - Optical repeating system supervising system - Google Patents

Abstract

PURPOSE:To obtain a sufficient S/N in a terminal station without affecting a communication quality by sending a supervision control signal from the terminal station through an exclusive supervisory fiber, receiving the control signal by means of a bidirectional reproducing repeater circuit, driving a supervision control part, and returning a response signal including supervisory activity information to the terminal station. CONSTITUTION:When a terminal station (A) 1 sends a supervision control instruction 7 to an exclusive supervisory fiber 10, the instruction 7 is received by a bidirectional reproducing repeater circuit 9, guided to a supervision control part 4, demodulated, and aimed supervisory activity is executed. Further, for the information collected by the supervisory activity, a supervisory information medium signal transmitted from a terminal station (B) 2 is operated by a modulating part arranged in the supervision control part 4, it is modulated by the bidirectional reproducing repeater circuit 9, and returned through the exclusive supervisory fiber 10 to the terminal (A) 1 as the supervisory response signal 8. Thus, the expected S/N can be obtained without excercising an adverse effect on the communicating signal.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to an optical relay system monitoring system, and in particular, a two-way regenerative repeater circuit unit dedicated to monitoring signals is driven through an optical fiber core dedicated to monitoring activity signals. The present invention relates to a relay system monitoring system such as an optical submarine relay system that realizes monitoring of the parameters of a regenerative repeater circuit unit and the line quality of the repeater section.

(Prior Art) The basic configuration of a conventional system relating to, for example, an optical submarine relay system is shown in FIG. In the figure, the conventional optical submarine relay system monitoring method is either terminal station (A) 1 or terminal station (B).
2, the supervisory control command signal 7 is exited. This supervisory control command signal is received by the optical regenerative repeater circuit unit 3, and the supervisory control section 4 demodulates the control command signal. Furthermore, based on the monitoring control command signal, monitoring activities are carried out on the parameters of the optical regenerative repeater circuit unit 3 and the line quality of the adjacent transmission line. This monitoring activity result is modulated into the opposing transmission signal and transmitted as a monitoring response signal 8. Monitored terminal station (A) 1,
Alternatively, the terminal station (B) 2 demodulates this modulated signal,
Obtain the desired monitoring information.

(Problem to be Solved by the Invention) The conventional optical repeater system monitoring method described above transmits the monitoring control command signal and the monitoring response signal from the terminal station to the regenerative repeater circuit unit and the optical fiber transmission line that are provided for constant communication. In particular, since the monitoring response signal is directly modulated on the communication signal used by the communication means, an adverse effect on the communication signal is expected. on the other hand,
Considering the degree of modulation that does not adversely affect the communication signal, there is a drawback that the expected S/N ratio for correctly extracting the monitoring information signal at the receiving end station cannot be obtained.

An object of the present invention is to provide an optical relay system monitoring method that does not have the above-mentioned drawbacks.

(Means for Solving the Problems) The optical relay system monitoring method according to the present invention is such that a monitoring control signal sent from a terminal station via a monitoring fiber is received by a two-way regenerator dedicated to monitoring control response, and a monitoring control unit and sends out a response signal containing monitoring information to the terminal station via the monitoring fiber.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of an optical relay system according to the present invention.

The optical submarine relay system monitoring system according to this embodiment includes a two-way regeneration circuit 9 dedicated to monitoring control and response provided in the relay device 2 that constitutes the conventional optical submarine relay system monitoring system shown in FIG. It is configured to include a monitoring optical fiber 10 which is a medium for propagating monitoring control and response signals. Its configuration and operation will be explained below.

For example, a signal 11 that determines the signal direction of the bidirectional reproducing circuit 9 is sent from the terminal station (A) 1 to the communication regenerative relay circuit unit 3 via the fiber 5.

At this time, the signal direction is the monitoring signal path from the terminal station (A) to (B
) direction. Next, when a monitoring activity control command 7 such as the parameters of the regenerative repeater circuit unit 3 and the quality of the corresponding line is sent to the monitoring optical fiber 10, this command 7 is received by the bidirectional regenerative repeater circuit 9. , and is demodulated by the monitoring control unit 4 to carry out the intended monitoring activity.

Next, when transmitting a response signal containing monitoring information to the terminal station (A), the terminal station (A) 1 again transmits the signal 11 that determines the signal direction of the bidirectional reproduction circuit 9 via the fiber 5 and monitors the signal. Change the signal path from the terminal station (B) to the direction (A). The information collected in the monitoring activities is transmitted from the terminal station (B) 2 to the monitoring information medium signal by the modulation unit located in the monitoring control unit 4, which modulates the information in the bidirectional regenerative relay circuit 9 and generates a monitoring response. It is sent back to the terminal station (A) 1 as a signal 8.

(Effects of the Invention) As explained above, in the present invention, a supervisory control signal is sent from a terminal station via a dedicated supervisory fiber, the control signal is received by a bidirectional reproducing circuit dedicated to supervisory control response, and the supervisory control unit is driven. In addition, a response signal containing monitoring activity information is sent to the terminal station via the bidirectional regeneration circuit and the monitoring fiber, which may affect the regenerative repeater circuit unit used for communication and the communication quality. This has the advantage that necessary modulation can be obtained as a monitoring response signal so that a sufficient S/N ratio can be obtained at the terminal station without any interference.

DESCRIPTION OF SYMBOLS 1... Terminal station (A), 2... Terminal station (B), 3... Optical regenerative repeater circuit unit, 4... Monitoring control unit, 5...
- Downlink optical transmission line, 6... Upstream optical transmission line, 7... Monitoring control command signal, 8... Monitoring response signal, 9... Bidirectional regenerative repeater circuit, 10... Monitoring dedicated light fiber, 11
...Signal direction determination signal.

Claims (1)

[Claims] The supervisory control signal sent from the end station via the supervisory fiber is received by the supervisory control response bidirectional regenerator to drive the supervisory controller, and the response signal containing supervisory information is sent to the end via the supervisory fiber. An optical relay system monitoring method that is characterized by transmitting signals to stations.