JPS63290031A - Monitor system for light intermediate repeating device - Google Patents

Abstract

PURPOSE:To simplify the circuit constitution of a light intermediate repeating device by providing a synchronization circuit used in common for the branch circuit of a reception signal, and a code error rate count circuit in the light intermediate repeating device, and counting selectively the code error rate of respective transmission line. CONSTITUTION:In a system, in which the plural transmission lines are constituted in one way or in two ways, one transmission line is assumed to be a master transmission line, and the others to be slave transmission lines, and the slave transmission line does not synchronize the reception signal in the respective light intermediate repeating device, and only branches 32, 33 the reception signal, and transmits one of outputs to the next light intermediate repeating device. At the same time, it outputs the other output to the light intermediate repeating device of the master transmission line, and the master transmission line side counts the code error rate by selecting 71 and synchronizing 31 the branched reception signal from the slave transmission line according to necessity, and transfers the said information to a light terminal station repeating side by using the master transmission line. Thus, the circuit constitution of the light intermediate repeating device can be drastically simplified.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a system for transferring the bit error rate of a received signal in an optical intermediate repeater to an optical terminal repeater, and particularly relates to a system that is composed of a plurality of transmission lines. The present invention relates to a monitoring system in an optical i1 repeater that uses one transmission line in a system that monitors another transmission line.

[Conventional technology]

Conventionally, in this type of monitoring system, each optical intermediate repeater synchronizes the received signal, checks the parity of the received signal, detects code rule errors, counts the code error rate, and converts the code into an auxiliary signal. The information is input and transferred to the optical terminal relay tlltR.

[Problem that the invention seeks to solve]

In the conventional monitoring system described above, the optical intermediate repeater always requires one set of synchronizing circuits and a counting circuit for code error #)4 for one transmission path, resulting in a large-scale system configuration. There was a problem. In addition, even in systems where multiple transmission lines are configured in one direction or in both directions, there is a problem that the scale of the equipment for monitoring the bit error rate of each optical intermediate repeater by the optical terminal repeater cannot be simplified. was there.

[Means for solving problems]

The monitoring method for the optical intermediate repeater IK of the present invention is such that when one optical intermediate repeater has a plurality of transmission paths, the optical intermediate repeater includes a received signal branch circuit, a shared synchronization circuit, and a code. An error rate counting circuit is provided to selectively count the code error rate of each transmission line.

[Effect]

In the present invention, in a system configured with a plurality of unidirectional or bidirectional transmission lines, one transmission line is regarded as a master transmission line, and the other transmission lines are regarded as slave transmission lines. The transmission line does not synchronize the received signals at each optical intermediate repeater, but simply branches the received signals and sends one output to the next optical intermediate repeater, while the other output is sent to the optical intermediate repeater of the master transmission line. The master transmission line side selects the branched received signal from the slave transmission line as necessary, and calculates the bit error rate by synchronizing the signal and transmits it to the master transmission line. , the information is transferred to the all-optical terminal station relay device side.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

The figure is a block diagram showing one embodiment of the present invention.

In the figure, 1 and 11 are the optical transmitters of the optical terminal relay device on the master side, 21 are the optical receivers of the optical intermediate relay device on the master side, and 3
1 is a synchronization circuit of the optical intermediate repeater on the master side, 41 is an optical transmitter of the optical intermediate repeater on the master side, 51 is an optical receiver of the optical terminal repeater on the master side, and 61 is a code for the optical intermediate repeater on the master side. The error rate counting circuit T1 is a received signal selection circuit of the optical intermediate repeater on the master side, and these constitute the entire transmission line on the master side.

12.13 is the optical transmitter of the optical terminal relay device on the slave side, 2
2.23 is the optical receiver of the slave side optical intermediate repeater, 32
．． 33 is a branch circuit (received signal branch circuit) of the optical intermediate repeater on the slave side, 42.43 is an optical transmitter of the optical intermediate repeater on the slave side, and 52.53 is an optical receiver of the optical terminal repeater on the slave side. , these constitute the slave side transmission line.

When one optical intermediate repeater has a plurality of transmission paths, a branch circuit 3 for the received signal is provided within the optical intermediate repeater.
2.33, a shared synchronization circuit 31, and a code error rate counting circuit 61, and is configured to selectively count the code error rate of each transmission path.

Next, the operation of the embodiment shown in this figure will be explained.

The master side transmission path includes an optical transmitter 11. Optical receiver 21, synchronization circuit 31. Optical transmitter 41. Optical receiver 51, code error rate counting circuit 61. It consists of a received signal selection circuit T1, and the optical intermediate repeater synchronizes the received signals, counts the code error rate, and relays the optical terminal using the bits allocated to the remote data in the auxiliary signal. transmitted to the device.

One slave-side transmission path includes an optical transmitter 12. Optical receiver 2
29 branch circuit 32. Optical transmitter 42. Optical receiver 52. Optical transmitter 13. Optical receiver 232 branch circuit 33. Optical transmitter 43
．． The optical receiver 53 does not add or drop auxiliary signals, and the branch circuits 32 and 33 only branch received signals.

Then, the branched signal is sent to the received signal selection circuit 71 of the master side transmission line, and here the synchronization circuit 31 of the master side transmission line also outputs the control signal.
One signal is selected from among the received signals, the code-p rate counting circuit 61 counts the code error rate, and transmits the information to the optical terminal relay device using the transmission path on the master side. .

In the embodiment shown in this figure, the number of transmission lines on the slave side is one for each of the up and down lines, but the number of transmission lines on the slave side can be further increased by adding a circuit configuration.

〔Effect of the invention〕

As explained above, the present invention takes advantage of the fact that a plurality of transmission lines are configured in one direction or both directions, and in the optical intermediate repeater of the slave transmission line, only the branch circuit for the received signal is used. This insertion allows each optical intermediate repeater on the master transmission line to selectively count the bit error rate of the slave transmission line as needed, greatly simplifying the circuit configuration of the optical intermediate repeater. There is.

[Brief explanation of drawings]

The figure is a block diagram showing one embodiment of the present invention. 11-13・Optical transmitter, 21-23・Optical receiver, 31・・Synchronization circuit, 32゜33・・11・Optical branch circuit, 41-43Φ・・Optical transmitter , 51-53・
φ・9 optical receiver, 61...φ・code error rate counting circuit, T
1... Reception signal selection circuit.

Claims (1)

[Claims] In a system that transfers the bit error rate of the received signal at the optical intermediate repeater to the optical terminal station repeater side, when one optical intermediate repeater has multiple transmission paths, the received signal 1. A monitoring system for an optical intermediate repeater, comprising a branch circuit, a shared synchronization circuit, and a code error rate counting circuit, and selectively counts the code error rate of each transmission path.