JPH0481197A - Data link system - Google Patents

Abstract

PURPOSE:To eliminate need for provision of an external remote controller and to reduce the scale of the data link system by integrating a function of remote supervisory and control to a control section in each device in an optical transmitter in which plural devices are interconnected by an optical signal line. CONSTITUTION:A path for inter-device serial communication utilizing an overhead bit of an optical signal is provided to optical signal lines 104-105 among devices 101-103 in an optical transmitter in which the plural devices are interconnected by the optical signal lines, and a control section of each device makes inter-communication with the serial communication path to collect alarm of other device for remote supervision and various control. Moreover, a serial communication path 107 for an electric signal between a device 106 not connected by the optical signal line and the device 102 connected by the optical signal line is provided, and each device makes communication with the device not connected by the optical signal line via the serial communication path for the electric signal through the devices connected by the serial communication path for the optical signal to collect alarm of other device for remote supervision and various control.

Description

[Detailed Description of the Invention] [Summary] Regarding a system that remotely monitors and controls optical transmission equipment, by incorporating remote monitoring and control functions into the control section of each device, external monitoring and control devices are no longer required. The purpose is to provide a data link system that can reduce the scale of the system, and uses overhead focusing of optical signals on the optical signal line between each device in optical transmission equipment in which multiple devices are interconnected by optical signal lines. A serial communication path is established between each device, and the control units of each device communicate with each other via this serial communication path, collect alarms from other devices, perform remote monitoring, and perform various controls. configured.

[Industrial application field]

The present invention relates to a system for remotely monitoring and controlling an optical transmission device, and more particularly to a data link system for remotely monitoring and controlling an optical transmission device using overhead bits of an optical transmission signal.

In an optical transmission device, it is necessary to monitor the normality of its functions and perform various necessary controls remotely, and therefore a remote monitoring and control system is provided.

It is desired that a remote monitoring and control system for an optical transmission device as described in item 2 be capable of performing necessary remote monitoring and control operations without providing an external monitoring and control device.

[Prior Art] Conventionally, in optical transmission equipment, a control system for remotely monitoring and performing various controls by collecting alarms from each device has conventionally provided a system for monitoring, monitoring, etc. external to the optical transmission equipment.
A commonly used method is to install a control device and remotely monitor and control the optical transmission device via this device.

[Problem to be solved by the invention]

Conventional remote monitoring and control systems for optical transmission equipment have been provided with monitoring and control equipment outside the equipment, which has led to the problem of an unavoidable increase in the scale of the equipment.

The present invention aims to solve the problems of the prior art, and by incorporating remote monitoring and control functions into the control section of each device, there is no need to provide an external monitoring and control device. The purpose is to provide a data link system that can reduce the scale of the system.

(Means for Solving the Problems) The data link system of the present invention includes a plurality of devices 101 to 101.
103 are mutually connected by optical signal lines 104 and 105, the optical signal line 10 between each device is
4, 105 is provided with a serial communication path between each device using the overhead bits of the optical signal. As a result, the control sections of each device communicate with each other via this serial communication path to remotely monitor and control other devices.

Further, in such a data link system, a serial communication path 107 using electrical signals is provided between the device 106 not connected by the optical signal line and the device 102 connected by the optical signal line, so that each device can communicate serially using the optical signal. The device 102 connected via the communication path communicates with the device 106 that is not connected via the optical signal line via the serial communication path 107 using this electrical signal, thereby performing remote monitoring and control. .

Furthermore, in such a data link system, a relay means 1 for relaying a serial communication path using optical signals is provided.
08, and each device has a relay means 108 between the devices 101 and 103 which are not directly connected by a serial communication path using optical signals.
It is designed to remotely monitor and control other devices by communicating via the .

[Effect]

In optical transmission equipment in which multiple devices are interconnected by optical signal lines, each device can be controlled by providing a serial communication path between each device using the overhead bits of the optical signal in the optical signal line between each device. The units communicate with each other through this serial communication path, collect alarms from other devices, perform remote monitoring, and perform various controls, eliminating the need for external monitoring and control devices.
It becomes possible to reduce the scale of the device.

In addition, at this time, a serial communication path using electrical signals is provided between devices that are not connected by an optical signal line and devices that are connected by an optical signal line, and each device connects to a device connected by a serial communication path using optical signals. Through this serial communication path using electrical signals, the device communicates with devices that are not connected via the optical signal line, collects alarms, and performs remote monitoring.
Further, various controls may be performed remotely.

Furthermore, in this case, a device having a relay means for relaying a serial communication path using an optical signal is provided, and each device is connected via a device having a relay means between devices that are not directly connected by a serial communication path using an optical signal. It is also possible to perform communication, collect alarms from other devices, perform remote monitoring, and perform various controls remotely.

〔Example〕

FIG. 2 shows the overall configuration of an embodiment of the present invention, and shows an example of the configuration of a communication system to which the data link system of the present invention is applied.

In FIG. 2, one station is an optical terminal equipment (LTE) device 1. It has device 2, and the ■ station is vertically split in the light! (REG
) has a device 3. ■The station is an optical terminal equipment (L
The station has a device 4 which is an optical repeater (TE), and the station has an optical repeater (RE).
G) device 5. It has a device 6. ■The station is a device 7. which is an optical terminal equipment (LTE). The ■station has a device 8, the ■station has a device 9 which is an optical repeater, and the ■station and the 4th station have a
Device 10 device 11, each of which is an optical terminal equipment (LTE)
have. Furthermore, in each device, MST indicates that it is a mask device, and SLV indicates that it is a slave device.

The thin wire signals connecting each station represent optical signal lines, and by using the overhead bits of each optical signal, a serial communication path is provided between the control units of each device using optical signals. Furthermore, double line signals within each station indicate serial communication paths by electrical signals between control units provided between each device.

In the system shown in FIG. 2, there is device 1, which is a mask optical terminal device, and device 2, which is an additional slave optical terminal device connected by serial communication between control units using electrical signals.
From there, it is connected to a device 4, which is a slave optical terminal device of the station (■), via a device 3, which is an optical repeater of the station (■). In addition, the device 1 is connected to device 7, which is a slave optical terminal device of the station, via device 5, which is an optical relay device of the station, and is also connected to device 5 by serial communication between control units using electrical signals. It is connected via device 6, which is an optical repeater, to device 7, which is a slave optical terminal device of station (2). Furthermore, the device 7 is connected to the device 11 which is the slave optical terminal device of four stations, and the additional slave optical terminal device in the station is connected to the device 7 by serial communication between the control unit using electric signals. A device 8 is connected to a device 10, which is a slave optical terminal device in the station (■), via a device 9, which is an optical repeater in the station (■).

In the data link system in the communication system shown in Figure 2, serial communication is performed between each station using the overhead bits of the main signal, and each slave device responds in response to polling from the mask device, thereby alarming other devices. Remote monitoring that collects and remotely monitors information, and also performs various controls.

A control action is performed.

That is, when a polling signal is sent from device 1, which is a mask, to each device, each device that receives the polling will respond to device 1 if its control unit determines that the polling is for its own station. As a result, remote monitoring and control of each slave device is performed from device 1, which is a mask.

In the system shown in FIG. 2, for example, there are two communication paths for serial communication between device 1 and device 7: a path that goes through device 5 and a path that goes through device 6. In this case, if signals are transmitted through both routes, signals will be superimposed on the receiving side and normal communication will not be possible, so it is necessary to use a single communication route to ensure normal communication. There is.

However, if the communication path is only one line, in the case of the upper side, device 5. One of the devices 6 is removed from the communication system, and communication becomes impossible.

Therefore, by connecting the device 5 and the device 6 through serial communication between the electrical signal control sections, the device 1 and the device 6 can be connected.
Enables serial communication between control units.

FIG. 3 shows an example of a configuration for realizing serial communication between control units using electrical signals.

In the figure, reference numeral 11 denotes an optical transmitting/receiving device in an optical terminal device or an optical repeater, which includes an optical signal receiving section (OR) 12 and a transmitting section (O3) 13, and transmits/receives signals consisting of optical signals,
Performs mutual conversion with the main signal consisting of the transmitted electrical signal. 1
Reference numeral 4 denotes a control unit, which has a serial communication LSI, and controls selectors SEL1 to SEL5EL3 by software to control the control unit in other optical terminal equipment or optical relay equipment via an electrical interface between control units (not shown). Serial communication between control units using electrical signals with an optical transmitting/receiving device is realized.

Hereinafter, an explanation will be given of the operation when the device 1, which is a mask, polls the device 5 and device 6 of the station ① to perform remote monitoring and control.

FIG. 4 is a diagram for explaining the signal path in the device 5.

Further, FIG. 5 is a diagram for explaining the signal path in the device 6.

Now, if device 1 sends a poll to device 5, this signal will pass through the path shown in ■ in Figure 2,
It is inserted into the overhead bits of the optical signal and transmitted, and is transmitted to the optical transmitting/receiving device 15 of the device 5 through the route shown in (■) in FIG.
is input. This signal is received by an optical receiver (OR) 16, converted into an electrical signal and separated from the overhead bits, and then sent to the selector SEL 1 from the path shown in ■.
, and is input to the control unit 17 of the device 5 via the route shown in (3).

If the polling is for its own device (device 5), the control section 17 sends a response thereto via path (2). This response passes through the selector 5EL2, is input to the optical transmitter (O3) 18 via the path ■, is inserted into the overhead bit of the optical signal, is sent out via the path ■, and is sent to the path indicated by ■ in FIG. is sent to device 1.

Next, the polling sent from the device 1 to the device 6 is inserted into the overhead bits of the optical signal and transmitted via the path shown by ■ in FIG.
The data is input to the device 5 through the route shown in FIG. This signal is
It is received by the optical receiver (OR) 16 in the optical transmitter/receiver I5, converted into an electrical signal, and separated from the overhead bits. It is sent to the device W6 via the electrical interface between the control sections shown by (2).

In the device 6 shown in FIG. 5, this signal passes through the selector SEL 1 via a path indicated by ■, and is input to the control section 19 via a path ■. If the polling is for its own device (device 6), the control section 19 sends a response thereto via path (3). This response is the selector 5
The signal passes through the EL3 and is sent to the device 5 from the path (3) via the inter-control unit electrical interface indicated by [phase] in FIG.

This signal passes through the selector 5EL2 from the path indicated by [phase] in the device 5 shown in FIG. The signal is sent out via (2) and sent to the device 1 via the path shown by (2) in FIG.

FIG. 6 shows the overall configuration of another embodiment of the present invention, and shows an example of a communication system device configuration to which the data link system of the present invention is applied.

In FIG. 6, the configuration of each station consisting of one station or one station,
The arrangement and the configuration of the optical signal lines between each station are the same as in the case of FIG.

In the embodiment of FIG. 6, some devices can respond to polling from other devices, and can send polling to other devices to request responses. Therefore, in the system shown in FIG. 6, a certain device has two independent serial communication paths, so that such serial communication can be relayed.

FIG. 7 shows an example of a configuration for realizing relay of serial communication.

In the figure, reference numerals 21 and 22 indicate optical transmitter/receivers between optical terminal devices or between optical repeaters, and the respective optical signal receivers (
OR) 23, 24 and a transmitter (O3) 25, 26. 27 and 28 are OR circuits. Reference numeral 29 is a control unit, which is a control unit for transmitting and receiving signals.
ous Asynchronous Receiver
Transmitter).

In the circuit shown in FIG. 7, by controlling the selectors 5EL1 to 5EL4 by software, the USARTCH
Serial communication between two different devices is performed via I and CH2.

At this time, USARTCH1 is used as the line for polling from the own device to other devices, and USARTCH2
The line is configured to be able to relay serial communications as a line for responding to polling from the mask.

Below, from device 1 which is a mask to device 7.8 which is a slave.
The operation of polling the device 11 and remotely monitoring and controlling the device 11 will be described.

FIG. 8 is a diagram for explaining the signal path in the device 7.

FIG. 9 is a diagram for explaining the signal path in the device W11.

Now, if device 1 sends a polling signal to device 7, this signal will pass through the path indicated by ■ in FIG.
The signal is transmitted by being inserted into the overhead bits of the optical signal, and is input to the first optical transmitting/receiving device 31 of the device 7 via the path shown by ■ in FIG.

This signal is received by the optical receiver (OR) 32, converted into an electrical signal, separated into over and over bits, passes through the selector 5EL1 from the path shown in ■, and is input to the OR circuit 33 through the path shown in ■. be done. The output is input to USARTCH2 in the control unit 34 via the path shown in (2).

If the polling is for its own device (device 7), the control section 34 sends a response thereto via path (2). This response passes through the selector 5EL2, is inserted into the overhead bit of the optical signal at the optical transmitter (O3) 35 of the optical transmitter/receiver 31 from the path 2, is sent out via the path 2, and is sent to the path shown by 3 in FIG. and device 1
sent to.

When polling is sent from the device 1 to the device 8, it is received by the control section 34 of the device 7 as described above and then sent to the control section of the electrical signal between the device 7 and the device 8 shown in FIG. is sent to the control section of the device 8 via a serial communication path [phase]. The control unit of device 8 performs the polling on its own device (
When it is determined that it is for the device 8), a response thereto is sent to the control section 34 of the device 7 via the electrical signal inter-control section serial communication path [phase]. This response passes through USARTCH2 as described above and is inserted into the overhead bit of the optical signal via the path shown in ■.
Sent to device 1.

Next, the polling sent from the device 1 to the device 11 is inserted into the overhead bit of the optical signal and transmitted via the path shown by ■ in FIG. is man-powered. This signal is received by the optical receiver (OR) 32 in the optical transmitter/receiver 31 of the device 7, converted into an electrical signal, and separated from the overhead bits.
1 and is input to the OR circuit 33 from the path shown in ■. The output is input to USARTCH2 in the control unit 34 via the path shown in (2).

In the control unit 34, the polling is performed by another device (device 11).
If the message was sent to the USA, it would be relayed to
It is sent to the device 11 via RTCH1. This signal passes through the selector 5EL4 from the path shown in ■, and is inserted into the overhead bit of the optical signal at the optical transmitter (O3) 37 of the optical transmitter/receiver 36 via the path ■.
The signal is sent out via the path indicated by [phase] in FIG. 6, and then input to the device 11 via the path indicated by [phase] in FIG.

This signal is received by the optical receiver (OR) 42 in the optical transmitting/receiving device 41 of the device 11, converted into an electrical signal and separated from the overhead bits, and then passes through the selector 5EL3 from the path shown in The signal is input to the OR circuit 43 from the path. The output is input to USARTCH2 in the control unit 44 via the path shown in (2).

In the control unit 44, the polling is carried out by the own device (device 11).
, the response to it is routed [phase]
It is then sent out. This response passes through the selector 5EL4 and from the path
The optical signal is inserted into the overhead bits of the optical signal, sent out via the path (2), and sent to the device 7 via the path shown by (2) in FIG.

This signal passes through the path indicated by ■ in FIG.
38, it is converted into an electrical signal and the overhead bits are separated, and then sent to the selector 5 from the path shown in ■.
The signal passes through EL3 and is input to the OR circuit 39 from the path shown in ■. The output is input to USARTCH1 in the control unit 34 via the path shown in [phase].

In the control unit 34, when the response is from another device (device 11), as explained in the previous example, the US
This is sent to device 1 via ARTCH2. This signal is sent from the selector 5EL2 to the optical transmitter (O3) 35, inserted into the overhead bit of the optical signal,
It is sent to the device 1 via the route shown in (2).

When the device 1 sends polling to the device 11 in this way, the response from the device 11 is sent via the device 7, so the device 1 sends a poll to the device 11 that is not directly connected by optical signals. Can be monitored and controlled.

In the above, device 1 performs remote monitoring by polling each slave station as a mask.

Although the case where control is performed has been described, in addition to this, it is also possible for a device other than the device 1 to have a function as a mask and poll other devices.

For example, when the device 7 serves as a mask and remotely monitors and controls the device 11, the same steps as in the previous example can be made using the routes shown by [phase] and @) in FIGS. 6 and 8. By polling the device 11 and requesting a response, the device 7 can remotely monitor and control the device 11.

In addition, by sending polling from the device 8 to the device 11, the device 7 to the device 11 is transmitted via the serial communication between the controllers of the electrical signals described above between the devices 7 and 8 of the seven stations indicated by [phase]. Then, the device 11 is polled through the routes shown by ■ and ■ in FIG. 8, and the device 7 is polled.
It is also possible to remotely monitor and control the device 11 using the device 7 by requesting a response thereto.

〔Effect of the invention〕

As explained above, according to the present invention, in the remote monitoring and control system for optical transmission equipment, the remote monitoring and control functions are incorporated into the control section within the optical transmission equipment, so that the remote monitoring and control functions are incorporated into the control section within the optical transmission equipment.
It becomes unnecessary to provide a control device, and it becomes possible to reduce the scale of the device.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the basic configuration of the present invention, FIG. 2 is a diagram showing the overall configuration of an embodiment of the present invention, and FIG. 3 is a configuration example for realizing serial communication between control units using electrical signals. 4 is a diagram for explaining the signal path in the device 5, FIG. 5 is a diagram for explaining the signal path in the device 6, and FIG. 6 is the overall configuration of another embodiment of the present invention. A diagram showing
FIG. 7 is a diagram showing a configuration example for realizing relay of serial communication, FIG. 8 is a diagram for explaining the signal path in the device 7, and FIG. 9 is a diagram for explaining the signal path in the device 11. It is. 101-103. 106-device, 104.105-.
- Optical signal line, 107 - Serial communication path using electrical signals, 108 - Relay means.

Claims (3)

[Claims] (1) A plurality of devices (101 to 103) connect optical signal lines (1
04, 105), an optical signal line (104, 105) between each device is provided with a serial communication path between each device using overhead bits of the optical signal. A data link system characterized in that control units communicate with each other via the serial communication path to remotely monitor and control other devices. (2) In the data link system according to claim 1, a serial communication path (107) using electrical signals is provided between the device (106) not connected by the optical signal line and the device (102) connected by the optical signal line. ), each device is connected via the device (102) via a serial communication path using an optical signal, the device (106) which is not connected via the optical signal line via the serial communication path (107) using the electrical signal. A data link system that performs remote monitoring and control by communicating with. (3) In the data link system according to claim 1 or 2, a relay means (1
08), and a device (102) having a device (101,
103), each device connects to the relay means (108)
A data link system that remotely monitors and controls other devices by communicating through a device (102) having a device.