JPH05252162A - Supervisory system - Google Patents

Abstract

PURPOSE:To perform network management even when different network managing protocols are mixed by providing an OHB signal area in a signal format separately when different line suppliers or supervisory systems are mixed partially. CONSTITUTION:An area of overhead bit (OHB) of (alpha) bytes is provided newly in addition to an area of section overhead (SOH) arranged in 1-9 lines and main data in 10-270 lines in a conventional system, and the OHB area is allocated as the one dedicated for supervisory signal in a network supervisory device. Since it is required to house an SOH and a pay-load including the (alpha) bytes within 125mus, speed change by a speed change part is performed. In the next station, a speed-changed decode signal is restored to an original one by the speed change part, and an OHB signal is extracted to an OHB signal separation part, and the supervisory signal of a preceding station is inputted to the network supervisory device. In such a way, the OHB signal area is provided independently from an SOH signal in the signal format.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring system, and in particular, when a plurality of vendors, which are line suppliers having different supervisory signal systems, are monitoring a line, each vendor uses the line mutually and is unique to each vendor. The present invention relates to a monitoring system capable of monitoring a line by the monitoring signal system.

[0002]

2. Description of the Related Art In a conventional monitoring system, as shown in FIG. 3, one vendor has a transmission system of a monitoring section 41 (for example, an optical transmission or wireless system) and a transmission system of a monitoring section 42 (for example, a wireless or optical transmission system). ) And the transmission system of the integrated monitoring section 43 including the monitoring sections 41 and 42, the line belonging to the monitoring section 41 is monitored by the network monitoring device 31 by using a monitoring signal system described later. Are monitoring. The lines belonging to the monitoring section 42 are monitored by the network monitoring device 32 using the same monitoring signal system described later. In addition, for the monitoring of each line belonging to the overall monitoring section 43, all the monitoring signals of the network monitoring devices 31, 32, 33 are received and the network monitoring device 34 performs overall monitoring. Here, the above-mentioned supervisory signal system will be described with reference to FIG. The signal format of FIG. 4 is SDH (Synchronous di).
The case of a digital hierarchy system is shown, but this STM of 270 columns (bytes) x 9 rows
(Synchronous Transport Mo
section) -N (N is a number indicating a multiplexing sequence) signal is used as a supervisory signal for 1 to 9 bytes of section overhead (hereinafter referred to as SOH (Section ov
er head) area, and 10 to 270 bytes are the payload. That is, monitoring and meeting signals for each station in each monitoring section are arranged using the SOH signal area. Returning to the explanation of FIG. 3, for example, the transmission signal 201 from the upper station in the monitoring section 41 becomes the decoded data signal 202 in the transmission system 21. The monitoring information separating unit 25A separates the SOH signal 203 from the decoded data signal 202 and sends it to the network monitoring device 31.
The network monitoring device 31 uses the SOH signal 203 to monitor the line and manage fault information, line operation, etc., and also sends out a monitor signal 204 of its own station. Monitoring information multiplexing unit 2
5B multiplexes the SOH signal 203A from the preceding station and the supervisory signal 204 of its own station in the SOH area to modulate signal 205.
Is transmitted as a transmission signal 206 to the transmission system 21 of the next station. The monitoring information separation unit 26A of the next station separates the SOH signal 209 of the transmission system 21, inputs the monitoring signal 210 of the own station from the network monitoring device 32, and
The signal 209 is multiplexed with the monitoring information multiplexer 26B and is sent as a modulated signal 211 to the transmission system 23 of the next station via the transmission system 22. Next, the transmission system 23 serving as the monitoring station of the monitoring section 42 inputs this transmission signal 207, and the monitoring information multiplexing unit 27A receives the monitoring signal 2 of the preceding station.
The SOH signal including 10 is extracted and sent to the network monitoring device 33, and the signal including the SOH signal from the monitoring section 41 and the monitoring signal 214 of the own station are multiplexed by the monitoring information multiplexing unit 27B, and the transmission system 23 is connected. It is sent out to the transmission system 24 of the next station via. Finally, the transmission system 24 takes out all the SOH signals in the integrated monitoring section 43 from the monitoring signal separation unit 28A, and the network monitoring device 3
It is supervised by 4. In this way, SOH of each monitoring section
Since all the signals are arranged and transmitted in the SOH area shown in FIG. 4, the monitoring information separating units 25 to 28A and the monitoring information multiplexing units 25B to 27B use the same type of device.

[0003]

In this conventional monitoring system, since only SOH signals of the same format are used as the monitoring signals for network management, the transmission systems of a plurality of vendors are connected in cascade. In this case, for example, if the vendors in the monitoring section 42 are different, the protocol of the network management information becomes a vendor-specific monitoring signal, and there is a drawback that different vendors cannot perform network management independently.

[0004]

A monitoring system according to the present invention is a monitoring system in which transmission systems in a plurality of monitoring sections are connected in cascade and provided with a network monitoring device for monitoring the transmission systems belonging to the respective monitoring sections. In the case where a part of the plurality of monitoring sections has a specific monitoring section whose monitoring signal system is different from that of the other monitoring sections, the network monitoring devices of the specific monitoring section have a normal signal format. In addition to the section overhead (referred to as SOH) for accommodating the line monitoring information arranged therein, an overhead bit (referred to as OHB) for accommodating the line monitoring information dedicated to the specific monitoring section is provided in the signal format.

[0005]

The present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram of an embodiment of the present invention.
FIG. 2 is a signal format diagram of this embodiment. 1, the same reference numerals as those in the conventional example of FIG. 3 have the same functions.
That is, in this embodiment, the network monitoring devices 10, 15 of the transmission systems 22, 23 belonging to the monitoring section 42.
Is a cascade connection of conventional transmission systems with lines using different management protocols with supervisory signaling. Therefore, since the network monitoring devices 10 and 15 are different,
An OHB signal multiplexing unit 12 for multiplexing an overhead bit (OHB) signal, which will be described later, speed conversion units 11, 13, OH
An OHB signal separation unit 14 that separates the B signal is provided.

Next, OHB (Over head bi)
The t) signal will be described with reference to the signal format diagram of FIG.
In the present embodiment, as shown in FIG. 2, in addition to the conventional SOH areas arranged in 1 to 9 columns and main data in 10 to 270 rows, an α byte OHB area is newly provided.
Monitoring signal 2 of the network monitoring devices 10 and 15 in the area B
10 and 213 are assigned exclusively. Since it is necessary to accommodate the SOH and the payload including this α byte within 125 μs, the speed conversion unit 11 performs speed conversion. In the next station, the speed-converted decoded signal 212 is returned to the speed converting unit 13 to the original, the OOH signal separating unit 14 extracts the OWB signal, and the monitoring signal 213 of the preceding station is input to the network monitoring device 15. is doing. By thus providing the OOH signal area in the signal format independently of the SOH signal, it is possible to monitor its own monitoring section irrespective of the signals of other monitoring sections even when mixed with other monitoring systems. it can.

[0007]

As described above, according to the present invention, in some transmission systems connected in cascade connection, when some line providers are different and the monitoring systems are also different, the OHB is included in the signal format.
By providing the signal area separately, it is possible to perform network management even if the network management protocols of a plurality of suppliers are different.

[Brief description of drawings]

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

FIG. 2 is a signal format diagram of the present embodiment.

FIG. 3 is a block diagram of a conventional monitoring system.

FIG. 4 is a signal format diagram of a conventional example.

[Explanation of symbols]

 11, 13 Speed converter 12 OHB signal multiplexer 14 OHB signal separator 21-24 Transmission system 25A, 26A Supervisory signal separator 25B, 27B, 28B Supervisory signal multiplexer 10, 15, 31, 34 Network monitor 41, 42 monitoring section 43 integrated monitoring section

Claims (2)

[Claims] 1. A monitoring system in which transmission systems in a plurality of monitoring sections are connected in cascade and provided with a network monitoring device for monitoring the transmission systems belonging to the respective monitoring sections, wherein: When some monitoring sections have a specific monitoring section whose monitoring signal system differs from other monitoring sections, the network monitoring information of the network monitoring devices in this specific monitoring section is stored in the normal signal format. Section overhead (S
In addition to OH), an overhead bit (called OHB) for accommodating the line monitoring information dedicated to the specific monitoring section is provided in the signal format. 2. An OHB signal multiplexing unit that multiplexes an SOH signal and an OHB signal before the network monitoring device so that the network monitoring devices in the specific monitoring section exchange the OOH signal with each other, and at least the OHB. The monitoring system according to claim 1, wherein the monitoring system is connected to an OHB signal separation unit that separates signals.