JPH04119740A - Remote monitor control method - Google Patents

Abstract

PURPOSE:To improve the line utilizing efficiency by using a control line interface section to link a control line from a specific center station to all remote stations together via a transmission line through bus structure thereby accessing a remote station from the center station. CONSTITUTION:A transmission data (Tx) from a control signal 1 of a center station 7 is multiplexed by a multiplexer section 4 via a control line interface 2 and the result is sent to a transmission line 9. Each of the center station 7 and a remote station 81 or the like uses the multiplexer section 4 so as to demultiplex the transmission data (Tx) and the demultiplexed data is sent to a monitor control section 6 via the control line interface 2 to form the line for the transmission data (Tx). The control line interface 2 ORs between a reply data (A) from the monitor control section 6 and a reply data (B) from other station and gives a resulting reply data (C) to the multiplexer section 4 and gives a final reply data (Rx) to the control section 1 of the center station 7 through the line for the reply data (Rx) for each of the center station 7 and the remote station 81 or the like.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to synchronous multiplexing at various locations in a digital transmission network configured by connecting multiple synchronous multiplexing devices installed at remote locations via transmission lines. The present invention relates to a method for remotely monitoring and controlling a device from a specific center station.

[Conventional technology]

The conventional method for remote monitoring and control of transmission equipment is disclosed in Japanese Patent Application Laid-open No. 59-57.
As described in Japanese Patent Application No. 54, opposing transmission devices were monitored using one monitoring control channel (line). According to this monitoring control method, in order to monitor a plurality of transmission devices, the same number of monitoring and control channels as the number of transmission devices are required.

[Problem to be solved by the invention]

In the above conventional technology, when monitoring and controlling multiple transmission devices, the number of monitoring and control channels and the number of monitoring and control channel interfaces increases, which increases the cost and reduces the number of lines actually used, resulting in poor line usage efficiency. There was a problem that the

The present invention uses a fixed number of supervisory control channels and supervisory control channel interface units when monitoring and controlling a synchronous multiplexing device of a plurality of transmission devices, so that even if the number of transmission devices to be monitored and controlled increases, the price does not increase. It is an object of the present invention to provide a remote monitoring and control method that can economically configure a monitoring and control system and improve line usage efficiency compared to the conventional method by not increasing the number of actually used lines.

[Means to solve the problem]

In order to achieve the above object, the remote monitoring and control method of the present invention provides a digital transmission network in which a plurality of synchronous multiplexers are connected via a transmission line, in which a control line interface section of the synchronous multiplexer controls the synchronous multiplexer. A communication method in which the control line from a specific center station is connected to all remote stations in a path configuration via a transmission path, and when the center station accesses the remote station, the remote station responds with monitoring control information. It is designed to respond by means.

[Effect]

In the above remote monitoring and control method, the control unit of the center station of the synchronous multiplexer monitors and controls the remote stations of multiple synchronous multiplexers installed in remote locations, collects monitoring information, and distributes control information. However, at this time, the control line interface section of the center station interfaces with the supervisory control data from the control section, and the remote station in the remote location relays and monitors the supervisory control data to respond with supervisory control information. I try to do that.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 is a side view of the configuration of a synchronous multiplexing device showing an embodiment of the remote monitoring and control method according to the present invention. In FIG. 1, the synchronous multiplexing device includes a terminal interface unit (IF2) 3,
A multiplexing unit (MUX) 4 and a transmission line interface unit (I
FI) 5, a supervisory control section (SVCONT) 6, and a control line interface section (CONTIF) 2.

With this configuration, the terminal interface unit 3 is connected to a data terminal or P
It connects to a BX, etc., provides an interface thereto, and passes this signal to the multiplexer 5. Also, the transmission line interface section 5
is connected to the transmission terminal equipment, interfaces with it, and passes this signal to the multiplexer 5. The multiplexing section 4 connects the signals from the terminal interface section 3 and the transmission line interface section 5 according to instructions from the control section 1. The supervisory control section 6 monitors the operation of the synchronous multiplexing device and directly controls the multiplexing section 4, the interface section 3.5, and the like. The control line interface 2 receives a signal from the control unit 1, for example, R3232C.
This signal is also passed to the multiplexing unit 4 and also to the supervisory control unit 6.

FIG. 2 is a side view of a synchronous multiplexer connection in a digital transmission network in which a plurality of synchronous multiplexers installed at remote locations shown in FIG. 1 are connected by a transmission line. In FIG. 2, a plurality of synchronous multiplexers connected by a transmission path 9 are connected to a certain center station (MUX-C) 7 and other remote stations (MUX-R1, MUX-R2) 81, 82, etc. from the control unit l of the center station 7 to the remote station 8].

82 is monitored and controlled.

FIG. 3 is a side view of the communication procedure between the center station 7 and remote stations 81 and 82 in FIG. In FIG. 3, from the center station 70 control unit 3 to the center station 7 and remote station 81 in FIG.
．． The supervisory control request data ('rX access-C, Tx access-RITX access-R2) is transmitted to all stations such as 82 and the like. This supervisory control request data (Tヮ access) reaches all stations 7, 81, 82, and only when the station address number set in this supervisory control request data matches the assigned station, that station receives the response data ( RX) is sent back. The transmission time interval of the supervisory control request data (access to T) from the control unit 3 of the center station 7 is set to a constant time interval so that the response data (RX) of each station 7, 81, 82, etc. do not collide.

Figure 4 shows the supervisory control request data (TX access) in Figure 3.
FIG. 3 is a side view of the configuration of a supervisory control channel for communicating and response data (RX). In FIG. 4, transmission data (TX) from a control section 1 of a center station 7 is multiplexed by a multiplexing section 4 via a control line interface 2 and sent out to a transmission line 9. In response to this transmission data ('r'*), each station such as the center station 7 and remote station 81 transmits the transmission data ('rx
) is branched at the multiplexing unit 4 and sent to the monitoring control unit 6 via the control line interface unit 2, and the transmission data (TX) is
Configure the line. One center station 7 and remote station 8
The line for the response data (RX) of each first-class station is the response data (A) from the supervisory control unit 6 and the response data (B) from other stations.
) is taken by the control line interface section 2, and the resulting response data (C) is passed to the multiplexing section 4, and finally passed to the control section 1 of the center station 7 as response data (RX).

With this configuration, response data (RX) from the center station 7 and remote stations 81, etc. of the multiple synchronous multiplexers is returned to the control unit 1 of the center station 7 by using two uplink and downlink lines. Ru. This response data (RX) is
. For detection, response data from other stations (
RX) performs ALL "1" detection, and at the time of this detection, the output after detection is restored to logic "0".

〔Effect of the invention〕

According to the present invention, when monitoring and controlling a plurality of synchronous multiplexers in a digital transmission network, only two uplink and downlink lines need to be used as monitoring and control channels at a specific station. Increased efficiency. Furthermore, there is no need to add a control line interface section at the center station, regardless of the number of synchronous multiplexers to be monitored and controlled. These results have the effect of reducing the price of the entire system.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a synchronous multiplexing device showing an embodiment of the remote monitoring and control method according to the present invention, FIG. 2 is a connection configuration diagram of the synchronous multiplexing device of FIG. 1, and FIG. How many times does the communication procedure take place?
FIG. 4 shows the configuration of the supervisory control channel of FIG. 3. DESCRIPTION OF SYMBOLS 1... Control unit of synchronous multiplexing device, 2... Control line interface unit, 3... Terminal interface unit, 4...
...Multiplexing section, 5... Transmission line interface section, 6.
...Control monitoring unit, 7...Synchronous multiplexer center station, 8
182...Remote station, 9...Transmission line. Agent Patent Attorney Tadashi Akimoto Real Figure 4 Sai Jmon JtP Translation 1 [Ishi1↑ Chair* Sla > Fuhuusu Aoi↑ 1π2IL)'$'1'No.4 I! 1st figure 57 81.82 Remote scrap figure CONT MUX-CMUX-R1MLIX-R2 figure

Claims (1)

[Claims] 1. In a digital transmission network in which a plurality of synchronous multiplexers each consisting of a terminal interface section, a multiplexing section, a transmission line interface section, a supervisory control section, a control line interface section, and a control section are connected via a transmission line, A specific synchronous multiplexing device is regarded as a center station, other synchronous multiplexing devices are regarded as remote stations, and the control line from this center station to the remote stations is relayed by the control line interface section, thereby enabling remote monitoring and control. A remote monitoring and control method characterized by: