JPH07123481A - Remote monitor system - Google Patents

Abstract

PURPOSE:To provide a remote monitor system for shortening the alarm detection time of a slave station at a master station concerning a centralized monitor system. CONSTITUTION:In the centralized monitor system, a master station 1 is provided with a master station monitor device 4, plural slave stations 2 are respectively provided with slave station monitor devices 5, and the master station 1 and the respective slave stations 2 are respectively provided with transmission line linking devices 6. The master station 1 collects the monitor information of the respective slave stations 2 by linking this master station monitor device 4 and the respective slave station monitor devices 5 through a transmission line 3. In this case, the master station 1 collects the monitor information of the respective slave stations 2 by requesting the transmission to the slave stations 2 and even when there is no transmission request, the alarm detection time of the slave stations 2 at the master station 1 can be shortened by transmitting the monitor information from the slave stations to the master station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centralized monitoring system, and particularly to a remote monitoring system capable of shortening a fault alarm (alarm) detection time for a slave station (monitored station) in a master station (central station). It is related to the method.

In a carrier device or the like, a slave station is provided for monitoring a monitored object such as a transmission device, and
A method is adopted in which a master station having a function of remotely monitoring a plurality of slave stations is provided and each monitored object is remotely monitored by the master station.

In such a remote monitoring system, it is desirable that when an alarm condition occurs, the slave station can immediately report an alarm to the master station without waiting for an inquiry from the master station.

[0004]

2. Description of the Related Art In a centralized monitoring system, there are a polling (selection) method and an immediate alarm transmission method as a monitoring method when a master station monitors a slave station.

(1) Polling method In the polling method, the master station makes a transmission request to each slave station at fixed time intervals, and each slave station responds to this by the status of the transmission device in each station. The centralized monitoring is performed by sending.

(2) Immediate alarm transmission system In the immediate alarm transmission system, when an alarm occurs in a slave station, the slave station immediately reports the alarm to the master station.

The configuration of the communication system to which the centralized monitoring system should be applied is roughly classified into a wire transmission system, an optical transmission system and a wireless transmission system.

(1) Wired transmission system There are a two-wire type telecommunication system and a four-wire type telecommunication system as a wired transmission system for transmitting an electric signal using a wired transmission line.

In the two-wire telecommunications system, two lines are used, one line is dedicated to sending, and the other one line is dedicated to receiving and communicating. Although this method simplifies the configuration of the electric circuit, it has a problem that it is easily affected by noise.

In the four-wire telecommunications system, four lines are used, two lines are dedicated to sending, and two other lines are dedicated to receiving and communicating. By transmitting signals of opposite polarities to the two lines, it is possible to reduce the influence of noise, which is a problem in the case of the two-line telecommunication system. This system is based on CCITT standard V. 1
It corresponds to 1.

(2) Optical transmission system An optical transmission system for communicating using optical signals includes a digital optical communication system in which a transmission path and a reception path are separately provided and a time compression multiplex (TCM). Optical communication system and Wavelength division Multiple
x: WDM) optical communication system.

The digital optical communication system in which optical fibers are separately provided for the transmission path and the reception path is an ordinary optical communication method in which an electric signal is converted into an optical signal, and a main signal composed of a digital signal is added to the main signal. An electric signal added with an overhead bit (OHB) is converted into an optical signal and transmitted.

In the TCM optical communication system, a main signal and an overhead bit are converted into an optical signal, and transmission and reception are alternately performed at a transmission rate of double to transmit the signal, so that the signal is transmitted through one optical fiber. Transmission and reception can be realized.

In the WDM optical communication system, two optical signals having different wavelengths are combined and transmitted to one optical fiber at the same time, and a receiving side separates them by using a filter so as to form a transmission path. In the case of a digital optical communication system in which a receiving path is separately provided, signal transmission for two systems can be performed.

(3) Radio Transmission System In the radio transmission system for communicating using radio signals,
Generally, a digital wireless communication system in which a transmission path and a reception path are provided separately, and a main signal composed of digital signals,
An electric signal added with an overhead bit (OHB) is converted into a wireless signal and transmitted.

FIG. 21 shows an example of a conventional centralized monitoring system.
Which is a two-wire system using a polling method.
The case of a telecommunication system is shown. In the figure, 11
Is the master station, which constitutes the central station and
Monitor inside. 12_1,12_2,12₃ Has multiple slave stations
And constitutes a monitored station. The slave station
Is not limited to 3, and may be any number. Master station 11 and each
Slave station 12_1,12 _2,12₃ From the master station
Downlink supervisory signal transmission line 13 toward the slave station and each slave
From the master station to the upstream supervisory signal transmission line 14
Is connected.

The configuration of the conventional remote monitoring system in the centralized monitoring system shown in FIG. 21 is as follows. The master station 11 is a master station monitoring device (Master Super
visory equipment: M-SV) 15, and each slave station 12 _1, 12 _2, 12 ₃ has a slave supervisory equipment (S-SV) 16 _1, 1
It has 6 _2, 16 ₃ . In addition, each S-SV16 _1, 16
_2, 16 ₃ are subordinate to the respective monitored objects (Network Element: NE) (17 _11, 17 ₁₂ ) and (1
7 _21, 17 ₂₂ ), and 17 ₃ .

Each of the S-SVs 16 _1, 16 _2, 16 ₃ has NEs (17 _11, 17 ₁₂ ), (17 _21, 17 17) under its control.
₂₂ ), 17 ₃ and collect necessary monitoring information. M
The -SV 15 is an S-SV 16 _1, 1 of each slave station via the downlink supervisory signal transmission line 13 and the uplink supervisory signal transmission line 14.
Centrally monitor 6 _2, 16 ₃ and collect necessary monitoring information.

The alarm detection procedure by the conventional remote monitoring system in the remote monitoring system shown in FIG. 21 will be described below.

Now, the NE 17 _{22 of the} slave station 12 ₂
Suppose that an alarm has occurred due to a failure condition. In this case, the S-SV 16 ₂ recognizes the alarm state of the NE 17 ₂₂ , but until the M-SV 15 makes a transmission request to the S-SV 16 ₂ by polling from the master station 11, the M-SV 15 is You cannot know when an alarm condition occurs.

After a lapse of a certain time, the M-SV 15 makes a transmission request to the S-SV 16 ₂ . This time is
It depends on the polling time interval defined for the master station 11.

[0022] After the S-SV16 ₂ receives a transmission request from the M-SV15, the response to M-SV15, and notifies the alarm NE17 _22. M-SV1
When receiving this, the 5 can know the occurrence of a failure in the NE 17 ₂₂ for the first time.

[0023]

In the conventional remote monitoring system based on the polling system, the slave station notifies the slave station of the alarm state in response to a transmission request from the master station to the slave station. Although there is an advantage that you can check the current status of the station at any time, even if an alarm condition occurs in the slave station, the master station will detect the alarm unless the master station makes a transmission request to the slave station. Therefore, there is a drawback in that a time lag from alarm generation to detection occurs.

On the other hand, in the immediate alarm transmission system, although the alarm occurrence of the slave station in the master station is detected quickly,
On the other hand, there is a problem that the master station cannot send a transmission request to the slave station at an arbitrary time to check the status.

The present invention is intended to solve such a problem of the prior art, and a plurality of slave stations for monitoring a monitored object such as a transmission device and a plurality of slave stations are remotely monitored. In a centralized monitoring system consisting of a master station, the current status of each slave station can be checked at any time by polling from the master station,
Each slave station does not wait for polling from the master station for the occurrence of an alarm condition in the monitored object under its control,
The purpose is to provide a remote monitoring system that can immediately notify the master station.

[0026]

[Means for Solving the Problems] (1) A master station is equipped with a master station monitoring device, a plurality of slave stations are each equipped with slave station monitoring devices, and a master station and each slave station are equipped with transmission line coupling devices. In a centralized monitoring system in which the master station collects monitoring information of each slave station by coupling the master station monitoring device and each slave station monitoring device via a transmission line, the master station By making a transmission request, the monitoring information of each slave station is collected, and even when there is no transmission request, the slave station transmits the monitoring information to the master station.

(2) In the case of (1), when the transmission line coupling device has a signal on only one of the transmission line and its own station, the master station monitoring device or the slave station monitoring device is coupled to the transmission line. To do so.

(3) In the case of (2), the transmission line coupling device includes a first pre-signal detection unit that detects that a specific pre-signal is transmitted to the transmission line and generates an output, Detects the output of only the second front signal detector that detects the occurrence of the front signal in its own station and generates an output, or the first or second front signal detector. A relay actuating section for generating an actuating signal, and a relay that operates according to the actuating signal to connect the master station monitoring device or the slave station monitoring device to the transmission path.

(4) In the case of (3), the front signal is composed of a plurality of pulses transmitted prior to the signal, and the first front signal detecting section and the second front signal detecting section are provided. The emitter is provided with a parallel circuit of a capacitor and a resistor, and an output is generated by the base input of a plurality of pulses, and the output is stopped after a predetermined time.

(5) In any one of (1) to (4),
The transmission line is composed of a + polarity side transmission line and a −polarity side transmission line, and a transformer with the input point midpoint grounded is provided at the input of the master station monitoring device and the slave station monitoring device. Information is transmitted by symmetrical + polarity signal and −polarity signal in the transmission path and the −polarity side transmission path.

(6) In the case of (3) or (4), the transmission line is composed of an optical transmission line, and the transmission line coupling device is provided with an optical transmission terminal station for inputting and outputting an optical signal. In addition to performing mutual conversion with, the telephone line signal in the electric signal and the monitor signal are separated and transmitted to each other, and the monitor signal is connected to the master station monitor device or the slave station monitor device, and the monitor signal The first front-end signal detector and the second front-end signal detector operate according to the above.

(7) In the case of (3) or (4), the transmission path is composed of a wireless transmission path, and the transmission path coupling device is provided with a wireless transmission terminal station for inputting and outputting a wireless signal, and the wireless signal and the electric signal are supplied. In addition to converting each other, the telephone line signal in the electric signal and the monitoring signal are separated and transmitted to each other, and this monitoring signal is connected to the master station monitoring device or the slave station monitoring device and The first pre-signal detector and the second pre-signal detector are operated by the signal.

(8) A plurality of slave stations are provided with a slave station monitoring device and a transmission line coupling device for coupling the slave station monitoring device to a transmission line, so that the master station monitors each slave station via the transmission line. In a centralized monitoring system that collects information, the master station collects monitoring information for each slave station by sending a request to the slave station, and the slave station sends monitoring information to the master station even when there is no request to send. To send.

(9) In the case of (8), a polling / alarm signal path (+) and a polling / alarm signal for transmitting the transmission request and the monitoring information through the transmission line by symmetrical + polarity signal and − polarity signal. The transmission line coupling device controls the transmission line coupling device to couple the monitoring information of the slave station monitoring device to the transmission line when the transmission request from the master station or the occurrence of an alarm in the local station is detected. S-
Equipped with SV firmware.

(10) In the cases of (8) and (8), the polling signal path (+) and the polling signal path (-) for transmitting the transmission request by the symmetrical + polarity signal and -polarity signal, and the monitoring information. Is composed of an alarm signal path (+) and an alarm signal path (-) which are transmitted by a symmetric + polarity signal and a -polarity signal, and a transmission request from the master station to the transmission path coupling device or an alarm in its own station. S-SV firmware for controlling the monitoring information of the slave station monitoring device so as to be coupled to the transmission line when the occurrence of is detected.

(11) In the case of (8), the transmission path is composed of an optical transmission path for transmitting the down signal and the up signal between the master station and each slave station, and the transmission request and the monitoring information are transmitted. Is inserted in the overhead of the main signal for transmission, and when the transmission line coupling device detects a transmission request from the master station or the occurrence of an alarm in its own station, the monitoring information of the slave station monitoring device is coupled to the transmission line. An overhead processing unit for controlling the above is provided.

(12) In the case of (8), the transmission path is composed of a wireless transmission path for transmitting a down signal and an up signal between the master station and each slave station, and the transmission request and the monitoring information are transmitted. When inserting into the overhead of the main signal and transmitting, and when the transmission line coupling device detects a transmission request from the master station or the occurrence of an alarm in its own station, it should connect the monitoring information of the slave station monitoring device to the transmission line. An overhead processing unit for controlling

[0038]

(Operation) (1) FIG. 1 shows the principle of the present invention. In the remote monitoring system of the present invention, the master station 1 is provided with the master station monitoring device 4, the plurality of slave stations 2 is provided with the slave station monitoring device 5, and the master station and the slave stations are respectively provided with the transmission line coupling device 6. Intended is a centralized monitoring system in which the master station collects the monitoring information of each slave station by coupling the master station monitoring device and each slave station monitoring device via the transmission path 3.

In the present invention, in this case, the master station makes a transmission request to the slave station to collect the monitoring information of each slave station, and even when there is no transmission request, the slave station sends to the master station. Since the monitoring information can be transmitted by transmitting the monitoring information, the alarm detection time from the slave station in the master station can be shortened.

(2) In this case, the transmission line coupling device 6 couples the master station monitoring device or the slave station monitoring device to the transmission line when a signal exists only on either the transmission line or within its own station. Therefore, it is possible to avoid the collision of signals between the master station and each slave station on the transmission path.

(3) In this case, the transmission line coupling device 6 detects that the specific front signal is transmitted to the transmission line by the first front signal detection unit 31 and generates an output, The second front signal detection unit 32 detects that a front signal is generated in its own station and generates an output, and the relay operation unit 33 causes either the first or second front signal detection unit to operate. Since the output signal of only one of them is detected and an operation signal is generated, the relay 34 is operated to connect the master station monitoring device or the slave station monitoring device to the transmission line. The master station monitoring device or the slave station monitoring device can be coupled to the transmission line when a signal is present on only one of them.

(4) The front signal is composed of a plurality of pulses sent prior to the supervisory signal and the polling signal, and in the circuit of the transistor Tr ₁ ,
Since the emitter is provided with a parallel circuit of the capacitor C ₁ and the resistor R _{1 and} the output is generated by the base input of the plurality of pulses, and the output is stopped after a predetermined time, the first pre-signal detector 31 Detects that a specific prefix signal has been sent to the transmission line and generates an output, and the second prefix signal detection unit 32 detects that a prefix signal has been generated in the own station and outputs it. Can occur.

(5) The transmission line 3 is composed of the + polarity side transmission line 23 and the-polarity side transmission line 24, and the input side midpoint is grounded to the input of the master station monitoring device and the slave station monitoring device. Since the transformers 41 and 51 are provided, the positive polarity side transmission line and the −
The present invention can be applied to the case where information is transmitted by symmetrical + -polarity signal and −polarity signal in the transmission path on the polarity side.

(6) The transmission line coupling device 6 is provided with optical transmission terminal stations 36A _{1 and} 36A ₂ for optical input / output to perform mutual conversion between an optical signal and an electric signal and a telephone line in the electric signal. Signal and the supervisory signal are separated and transmitted to each other, and the supervisory signal is connected to the master station supervisory device 4 or the slave station supervisory device 5, and the supervisory signal causes the first pre-signal detector 31 and 2 front signal detector 3
Since 2 and 3 are operated, the present invention can be applied even when the transmission line 3 is an optical transmission line.

(7) The transmission line coupling device 6 is provided with wireless transmission terminal stations 36B _{1 and} 36B ₂ for inputting and outputting radio signals to perform mutual conversion between radio signals and electric signals, and to make telephone calls during electric signals. The line signal and the supervisory signal are separated and transmitted to each other, and this supervisory signal is connected to the master station supervisory device 4 or the slave station supervisory device 5, and the supervisory signal causes the first pre-signal detector 31 to Since the second front-end signal detector 32 operates, the present invention can be applied even when the transmission path 3 is a wireless transmission path.

(8) In the remote monitoring system of the present invention, the master station is provided with the transmission line by providing the plurality of slave stations with the slave station monitoring device and the transmission line coupling device for coupling the slave station monitoring device to the transmission line. It is intended for a centralized monitoring system that collects monitoring information of each slave station via.

In the present invention, in this case, the master station makes a transmission request to the slave station to collect the monitoring information of each slave station, and even when there is no transmission request, the slave station sends to the master station. Since the monitoring information can be transmitted by transmitting the monitoring information, the alarm detection time from the slave station in the master station can be shortened.

(9) The transmission line coupling device 71 is equipped with the S-SV firmware 82, and when the transmission request from the master station or the occurrence of an alarm in the local station is detected, the monitoring information of the slave station monitoring device is transmitted. Since the transmission path is controlled so as to be coupled to the polling / alarm signal path (+) 63 and the polling / alarm signal path (- The present invention can be applied to a shared two-wire telecommunication system consisting of 64).

(10) When the transmission line coupling device 71 is equipped with the S-SV firmware 82A and a transmission request from the master station or an alarm occurrence in the own station is detected,
Since the monitoring information of the slave station monitoring device is controlled so as to be coupled to the transmission path, the transmission path transmits a transmission request by a symmetrical + polarity signal and a − polarity signal. A polling signal path (+) 63A and a polling signal path. (-) 63B, an alarm signal path (+) 64A and an alarm signal path (-) that transmit monitoring information by symmetrical + -polarity signal and -polarity signal.
The present invention can be applied to the case of a 4-wire telecommunications system including 64B.

(11) The transmission line coupling device 71 inserts the transmission request and the monitoring information into the overhead of the main signal for transmission, and the overhead processing section 91 causes the overhead processing unit 91 to transmit the transmission request from the master station or the alarm in the own station. When the occurrence is detected, the monitoring information of the slave station monitoring device 72 is controlled so as to be coupled to the transmission line, so that the transmission line transmits the down signal and the up signal between the master station 61 and each slave station 62. The present invention can be applied to a digital optical communication system including the optical transmission lines 65A and 65B.

(12) The transmission line coupling device 71 inserts the transmission request and the monitoring information into the overhead of the main signal for transmission, and the overhead processing section 91 causes the overhead processing unit 91 to transmit the transmission request from the master station or the alarm in the own station. When the occurrence is detected, the monitoring information of the slave station monitoring device 72 is controlled so as to be coupled to the transmission line, so that the transmission line transmits the down signal and the up signal between the master station 61 and each slave station 62. The present invention can be applied to a wireless communication system including the wireless transmission paths 70A and 70B.

[0052]

2 to 20 show an embodiment of the present invention, and FIGS. 2 to 12 show a case where the remote monitoring system of the present invention is realized by hardware, and FIGS. FIG. 20 shows a case where the remote monitoring method of the present invention is realized by software.

FIG. 2 shows the entire configuration of the embodiment (1) of the present invention, in which a shared signal 2 using a bipolar signal is used.
The case of a wire telecommunication system is illustrated. Reference numeral 21 denotes a master station, which constitutes a central station and performs centralized monitoring in the system. Reference numerals 22 _1, 22 _{2 and} 22 ₃ denote a plurality of slave stations, which constitute monitored stations. The number of slave stations is not limited to three and may be any number. The master station 11 and the slave stations 22 _1, 22 _2, 22 ₃ are connected by a downlink supervisory signal transmission line 13 and an uplink supervisory signal transmission line 14.

The master station 21 is a master station monitoring device (M-
It has an SV) 25 and a transmission line coupling device 26. Each
Rave station 22_1,22_2,22₃ Is a transmission line coupling device
27 _1,27_2,27₃ And a slave station monitoring device (SS
V) 28_1,28_2,28₃ have. Also, each S-S
V28_1,28_2,28₃ Are the transmission devices under each
Monitored object (NE) (29)_11,29₁₂), (29
_{twenty one,}29_{twenty two}), 29₃ have.

Each of the S-SVs 28 _1, 28 _2, 28 ₃ has its subordinate NEs (29 _11, 29 ₁₂ ), (29 _21, 29 29).
_22), 29 ₃ monitors to collect the required monitoring information. M
The −SV 25 includes a + polarity side transmission path 23 and a −polarity side transmission path 2
4 through S-SV 28 _1, 28 _2, 28 of each slave station
Centrally monitor ₃ and collect required monitoring information.

+ Polarity side transmission line 23 and-polarity side transmission line 24
Means to form a signal path of a shared two-wire telecommunications system, and transmit the same signal to two lines at the same time by a symmetrical digital signal composed of a positive polarity pulse and a negative polarity pulse, respectively. The influence of noise can be reduced.

FIG. 3 shows the configuration of the transmission line coupling apparatus in the embodiment (1), in which the same components as those in FIG. 2 are designated by the same numbers, and 31 and 32 are front signal detecting portions, respectively. Therefore, it has a transistor Tr _{1, a} capacitor C _{1, and} resistors R _{1 and} R ₂ . Reference numeral 33 is a relay operating unit, which has an exclusive OR circuit E-OR, a transistor Tr _{2, and a} resistor R ₃ . 34 is a relay and has a contact 34
And a _1, 34 _2.

When the pre-signal detectors 31 and 32 receive a pre-signal consisting of a plurality of pulses representing "1",
When the transistor Tr ₁ is turned on and the capacitor C ₁ is charged from the power source + V _{CC, the} output which continuously becomes “1” is generated. The prefix signal is sent prior to the alarm signal and the polling signal. Capacitor C ₁
When the front signal is extinguished, the electric charge of is discharged through the resistor R ₁ , so that the outputs of the front signal detection units 31 and 32 are “0”.
Becomes

The relay actuating section 33 includes the front signal detecting section 3
Either 1,32 operates, when the other does not work, by outputting the E-OR is "1", the transistor Tr ₂ is turned on, the relay 34 is operated, whereby the contacts 34 _1, 34 ₂ turns on.

As a result, in the receiving state, the signals on the positive polarity side transmission line 23 and the negative polarity side transmission line 24 are M-.
It is received by SV25 or S-SV28 _1, 28 _2, 28 ₃ . In the transmission state, M-SV25 or S-
The signals from the SVs 28 _1, 28 _2, 28 ₃ are sent to the + polarity side transmission path 23 and the −polarity side transmission path 24.

FIG. 4 shows the operational truth value of the E-OR in the relay actuating portion, and the both front signal detecting portion 3 is shown.
When one of the outputs A and B of 1 and 32 is "1" and the output of the other is "0", the output of the E-OR is "1" and both outputs A and B are "1". It is shown that the output of the E-OR becomes "0" when it is "0" or "1".

That is, the operation of the transmission line coupling device is summarized as follows. There is no signal on the transmission line and the operation is M-SV or S-SV.
Is not transmitted, the relay is off and the M-SV or S-SV is disconnected from the transmission line.

With no signal on the transmission line, the M-SV
Alternatively, when transmitting from S-SV, the relay is turned on, M-SV or S-SV is connected to the transmission line, and the transmission state is set.

With a signal on the transmission line, the M-SV
Alternatively, when the transmission from the S-SV is not performed, the relay is turned on, the M-SV or the S-SV is connected to the transmission line, and the reception state is set.

With a signal on the transmission line, the M-SV
Alternatively, when transmitting from the S-SV, the relay is turned off and the M-SV or S-SV is disconnected from the transmission line, so that collision of signals on the transmission line is prevented.

FIG. 5 shows the configuration of the master station monitoring device in the embodiment (1), and the same components as those in FIG. 2 are designated by the same numbers. 41 is an input transformer whose center tap is grounded, 42 is a coupling unit for separating / combining a received signal and a transmitted signal, 43 is a receiving unit for receiving a signal from a slave station monitoring device, and 44 is a received signal. It is a signal processing unit. Further, 45 is a transmitter for transmitting a signal to the slave station monitoring device, 46 is a prefix signal generator for generating a prefix signal, and 47 is a polling signal generator for generating a polling signal.

At the time of reception, the bipolar signals from the S-SV on the + polarity side transmission path 23 and the-polarity side transmission path 24 are
In the M-SV 25, the signal is converted into a unipolar signal by the transformer 41, received by the receiving unit 43 via the combining unit 42 and decoded, and the required signal processing is performed by the signal processing unit 44 to display an alarm. Done.

At the time of transmission, the front signal generation unit 46 generates a front signal and supplies it to the transmission unit 45, and the transmission unit 45 inputs this to the transformer 41 via the coupling unit 42. Transformer 41
Then, the front signal is converted into a bipolar signal and sent to the + polarity side transmission path 23 and the −polarity side transmission path 24. The polling signal generator 47 also generates a coded signal required for polling and similarly sends it via the transmitter 45.

FIG. 6 shows the configuration of the slave station monitoring device in the embodiment (1), and the same components as those in FIG. 2 are designated by the same numbers. Reference numeral 51 is an input transformer having a center tap, 52 is a coupling section for separating / combining a reception signal and a transmission signal, 53 is a reception section for receiving a signal from a master station monitoring device, and 54 is a signal processing for processing the reception signal. It is a department. Further, 55 is a transmitting unit for transmitting a signal to the master station monitoring device, 56 is a front signal generating unit for generating a front signal, and 57 is a monitoring signal generating unit for generating an alarm signal.

During reception, the bipolar polling signals from the M-SV on the + polarity side transmission path 23 and the-polarity side transmission path 24 are separated by the transformer 51 in the S-SV 28 _1, 28 _2, 28 ₃ . The signal is converted into a polar signal, and the coupling unit 52
After being received, the signal is received and decoded by the receiving unit 53, and required signal processing is performed at the signal processing unit 54, whereby a required response is instructed to the transmitting unit 55.

At the time of transmission, the prefix signal generator 56 generates a prefix signal and supplies it to the transmitter 55, and the transmitter 55 inputs this to the transformer 51 via the coupler 52. Transformer 51
Then, the front signal is converted into a bipolar signal and sent to the + polarity side transmission path 23 and the −polarity side transmission path 24. The monitor signal generator 57 also generates a required alarm signal when an alarm is generated in the monitored object (NE), and similarly sends the alarm signal via the transmitter 55.

A procedure for detecting an alarm not based on polling in the remote monitoring system of the present invention in the remote monitoring system shown in FIG. 2 will be described below.

Now, the NE 29 _{22 of the} slave station 22 ₂
Suppose that an alarm has occurred due to a failure condition.

In this case, the SS of the slave station 22 ₂
When V28 ₂ recognizes the alarm state of NE 29 ₂₂ ,
Immediately, an alarm signal is sent to the M-SV 25 in the master station 21.

Therefore, according to the present invention, even if the M-SV 25 does not issue a transmission request to the S-SV 28 ₂ ,
Since the occurrence of an alarm in S-SV28 ₂ can be detected in -SV25, the time until the alarm is detected in M-SV25 can be significantly shortened.

In this case, the S-SV2 of the slave station 22 ₂
8 ₂ can send the alarm signal to the transmission line only when the signal of the master station or another slave station is not sent to the transmission line. This is for the purpose of preventing collision of signals in the transmission path, the transmission path coupling apparatus 27 ₂ is as described above operations, when there is no signal from the master station or other slave stations on a transmission path, the relay contact 34 Closing _1, 34 ₂ allows the alarm signal to be sent from the S-SV 28 ₂ .

Similarly, in the master station 21, when the signal from the slave station is not transmitted to the transmission line, the polling signal can be transmitted, which allows the M-SV to be transmitted in the same manner as in the conventional remote monitoring system. It is possible to realize the transmission request function from S to S-SV.

FIG. 7 shows the overall configuration of the embodiment (2) of the present invention, and illustrates the case where an optical signal is used. The optical transmission line 30A is used for the master station 21 and each slave. The case where signals are transmitted and received between the stations 22 _1, 22 _{2, and} 22 ₃ is shown.

In FIG. 7, the same as in FIG.
Are indicated by the same number, and 25A is a master station monitoring device (MS
V), 26A_,27A_1,27A_2,27A₃ Is transmission line coupling
Device, 28A_1,28A_2,28A₃ Is a slave station monitoring device
(S-SV) and 30A are optical transmission lines. M-SV25
A, transmission line coupling device 26A_,27A_1,27A_2,27A
₃ , S-SV28A_1,28A_2,28A₃ Each is a figure
M-SV 25 and transmission line coupling device 26 in the second embodiment
_,27_1,27_2,27₃ , S-SV28_1,28_2,28₃ When
It has the same function, but the configuration is slightly different.

FIG. 8 shows the configuration of the transmission line coupling apparatus in the embodiment (2), and the same elements as those in FIGS. 3 and 7 are indicated by the same numbers. 35A, 35
B is a transmission line such as a telephone line and a monitoring signal (S
V signal) transmission line. Reference numerals 36A _{1 and} 36A ₂ are optical transmission terminal stations that terminate optical signals, and each have an optical transmission / reception unit (optical S / R) 37 and a demultiplexing / coupling unit (D / C) 38.

In the optical transmission terminal stations 36A _{1 and} 36A ₂ , the optical S / R 37 is the optical signal of the optical transmission line 30A and the D / C 38.
Mutual conversion with the electric signal on the side of. D / C38 is
By separating / combining this electric signal and transmission information of a telephone line or the like, connecting to the transmission line 35A of a telephone line or the like, and further separating / combining overhead bits (OHB),
It is connected to the SV signal transmission path 35B. The SV signal is composed of an alarm signal, a polling signal and other control signals.

As a result, in the receiving state, the optical transmission line 3
The alarm signal and the polling signal at 0A are M-
It is received by SV25A or _{S-SV28A 1, 28A 2,} 28A 3. In the transmission state, M-SV25A
Alternatively _, the alarm signal and the polling signal from the S-SV 28A _1, 28A _2, 28A ₃ are sent to the optical transmission line 30A.

FIG. 9 shows the structure of the master station monitoring device in the embodiment (2), the same parts as those in FIG. 5 are indicated by the same numbers, and 42A separates the received signal and the transmitted signal. -It is a joining part to join.

Upon reception, the coupling unit 42A separates the alarm signal from the SV signal in the SV signal transmission path 35B and inputs the alarm signal to the reception unit 43, and the signal processing unit 44 performs processing such as display according to this, and at the time of transmission. , The front signal from the front signal generator 46 or the polling signal from the polling signal generator 47 is coupled to the SV signal via the transmitter 45,
The SV signal is sent to the transmission path 35B.

FIG. 10 shows the configuration of the slave station monitoring device in the embodiment (2), the same components as those in FIG. 6 are indicated by the same numbers, and 52A separates the received signal and the transmitted signal. -It is a joining part to join.

Upon reception, the coupling unit 52A separates the polling signal from the SV signal in the SV signal transmission path 35B and inputs the polling signal to the reception unit 53. The signal processing unit 54 controls the transmission unit 55 by this, and at the time of transmission. , The prefix signal or supervisory signal generator 5 from the prefix signal generator 56 via the transmitter 55
The alarm signal from 7 is combined with the SV signal and sent to the SV signal transmission line 35B.

In the remote monitoring system shown in FIG. 7, the alarm detection procedure according to the remote monitoring system of the present invention is performed in the same manner as in the embodiment shown in FIG. Therefore, according to this embodiment, when an alarm occurs in NE29 ₂₂ in S-SV28A _2, M-
SV25A is without generating a transmission request to the S-SV28A _2, in M-SV25A, S-SV28A
_Since the alarm occurrence in ₂ can be detected,
It is possible to significantly reduce the time until the alarm is detected in the M-SV25A.

FIG. 11 shows the overall configuration of the embodiment (3) of the present invention, and illustrates the case where a radio signal is used. In this case, in the wireless transmission system,
Signal transmission / reception is realized using the wireless transmission path 30B.

In FIG. 11, the same as in FIG.
Are indicated by the same numbers, and 26B_,27B_1,27B_2,27B
₃ Is a transmission line coupling device. Transmission line coupling device 26B_,Two
7B _1,27B_2,27B₃ Is the transmission in the embodiment of FIG.
Road coupling device 26A_,27A_1,27A_2,27A₃ Same machine as
Function, but the configuration is slightly different. In addition,
Station monitoring device (M-SV) 25A, slave station monitoring device
Position (S-SV) 28A _1,28A_2,28A₃ Shown in Figure 7
It is similar to the case of the embodiment described above.

FIG. 12 shows the structure of the transmission line coupling apparatus in the embodiment (3), which is shown in FIGS. 8 and 11.
The same thing as in is shown with the same number. 36B _1,
36B ₂ is a wireless transmission terminal station that terminates a wireless signal,
Each has a separation / combination unit (D / C) 38 and a wireless transmission / reception unit (wireless S / R) 39. Figure 8 for D / C38
It is similar to the case of.

In the wireless transmission terminal stations 36B _{1 and} 36B ₂ ,
The wireless S / R 39 receives the wireless signal of the wireless transmission line 30B and D
Mutual conversion with the electric signal on the side of / C38 is performed.

As a result, in the receiving state, the alarm signal and the polling signal on the wireless transmission line 30B are M
-SV25A or _{S-SV28A 1, 28A 2,} 28A 3
Received by. In the transmission state, M-SV25
The alarm signal and the polling signal from the A or S-SV 28A _1, 28A _2, 28A ₃ are sent to the wireless transmission line 30B.

In the remote monitoring system shown in FIG. 11, the alarm detection procedure according to the remote monitoring system of the present invention is performed in the same manner as in the embodiment shown in FIG. Therefore, according to this embodiment, when an alarm occurs in NE29 ₂₂ in S-SV28A _2, M-
SV25A is without generating a transmission request to the S-SV28A _2, in M-SV25A, S-SV28A
_Since the alarm occurrence in ₂ can be detected,
It is possible to significantly reduce the time until the alarm is detected in the M-SV25A.

FIG. 13 shows the overall configuration of the embodiment (4) of the present invention, and illustrates the case of a shared two-wire telecommunications system using signals of both polarities. Reference numeral 61 denotes a master station, which constitutes a central station and performs centralized monitoring within the system. A slave station 62 constitutes a monitored station. The master station 61, the slave station 62, and other slave stations (not shown) include a polling / alarm signal path (+) 63 which is a + polarity side transmission path shared by a polling signal and an alarm signal, and a polling signal and an alarm signal. Shared with-polling / which is the transmission path on the polar side
It is connected by the alarm signal path (-) 64.
In this case, the number of slave stations is arbitrary.

The slave station 62 has a transmission line coupling device 71, and according to the polling signal and the alarm signal, the polling / alarm signal path (+) 63 and the polling / alarm signal path (-) 64 are connected to the slave station 62. Monitoring device (S-S
V) binds to 72. The S-SV 72 monitors NEs under its control (not shown) and collects necessary monitoring information. The same applies to the configuration of other slave stations not shown.

The polling / alarm signal path (+) 63 and the polling / alarm signal path (-) 64 form a common 2-wire telecommunications system transmission path, and the same signal is a symmetrical + polarity pulse. The influence of noise can be reduced by transmitting simultaneously on two lines by means of a digital signal consisting of a pulse with a polarity.

The transmission line coupling device 71 includes switches 81A and 8A.
1B and S-SV firmware 82.
The S-SV firmware 82 sends an alarm signal from the slave station 62 at the time of polling from the master station 61 and controls the slave station 62 under software control.
When the alarm is generated, the sending of the alarm signal to the master station 61 is controlled. FIG. 14 is a flowchart (1) of the S-SV firmware, showing software control when the present invention is applied to a transmission line of a shared 2-wire telecommunications system.

The S-SV firmware 82 detects, for example, a polling signal from the M-SV of the master station 61 in the polling / alarm signal path (+) 63, or transmits / receives (+) the S-SV 72, for example. When the occurrence of the alarm signal in S is detected, the switches 81A and 81B are turned on, so that the S-SV7
Alarm signals from the two transmission / reception (+) and transmission / reception (-) are transmitted to the master station 61 via the polling / alarm signal path (+) 63 and the polling / alarm signal path (-) 64. .

Therefore, the master station monitoring device (M-SV) (not shown) in the master station 61 polls as described above via the polling / alarm signal path (+) 63 and the polling / alarm signal path (-) 64. The S-SV 72 of each slave station can be centrally monitored to collect necessary monitoring information, and when an alarm occurs in the slave station, this information can be immediately received. In the case of the embodiment (4), since the transmission line of the shared two-wire telecommunications system is used, it is necessary to prevent the collision of signals on the transmission line.
This can be easily realized, for example, by providing the master station and each slave station with the same configuration as in the transmission line coupling apparatus shown in the embodiment (1).

FIG. 15 shows the overall construction of the embodiment (5) of the present invention, illustrating the case of a four-wire telecommunications system using bipolar signals, the same as in FIG. Items are indicated by the same numbers. The master station 61, the slave station 62, and other slave stations (not shown) are a polling signal path (+) 63A that is a + polarity side transmission path that transmits a polling signal and a-polarity side transmission path that transmits a polling signal. A polling signal path (-) 63B, an alarm signal path (+) 64A that is a + polarity side transmission path that transmits an alarm signal, and an alarm signal path (-) 64B that is a-polarity side transmission path that transmits an alarm signal. Connected by. In this case, the number of slave stations is arbitrary.

The slave station 62 has a transmission line coupling device 71, and depending on the polling signal and the alarm signal, the polling signal line (+) 63A and the polling signal line (-) 63 are provided.
B and the alarm signal path (+) 64A and the alarm signal path (-) 64B are connected to the slave station monitoring device (S-SV) 7
Combine to 2. The S-SV 72 is a subordinate N (not shown).
E is monitored and required monitoring information is collected. The same applies to the configuration of other slave stations not shown.

Polling signal path (+) 63A, polling signal path (-) 63B and alarm signal path (+) 64
A, the alarm signal path (-) 64B forms a transmission line of a four-wire telecommunications system, and the polling signal and the alarm signal are digital signals composed of symmetrical + polarity pulse and-polarity pulse, respectively. , And the effect of noise can be reduced by transmitting each to two lines.

The transmission line coupling device 71 includes switches 81A and 8A.
1B and S-SV firmware 82A. The S-SV firmware 82A controls the sending of an alarm signal from the slave station 62 when polling from the master station 61 and the sending of an alarm signal to the master station 61 when an alarm occurs in the slave station 62 by software control. I do. FIG. 16 shows S-S
9 is a flowchart (2) of V firmware, showing software control when the present invention is applied to a transmission line of a four-wire telecommunications system.

During polling of the master station 61, S-SV7
2 receives the polling signal of the master station 61 into the reception (+) and reception (-) of the S-SV 72 through the polling signal path (+) 63A and the polling signal path (-) 63B, and at the same time, the S-SV firmware. When 82A detects the polling signal of the master station 61 on the polling signal path (+) 63A, for example, the switches 81A and 81B
By turning on, the alarm signals from the transmission (+) and transmission (-) of the S-SV 72 are transmitted to the master station 61 via the alarm signal path (+) 64A and the alarm signal path (-) 64B. To do.

When the S-SV firmware 82A detects the occurrence of an alarm signal in the transmission (+) of the S-SV 72, the switches 81A and 81B are turned on to transmit the S-SV 72 (+), The alarm signal from the transmission (-) is sent to the alarm signal path (+) 6
4A, alarm signal path (-) 64B to the master station 61.

Therefore, the master station monitoring device (M-SV) (not shown) in the master station 61 has a polling signal path (+) 63A, a polling signal path (-) 63B and an alarm signal path (+) 64A, an alarm signal path ( -) 64
As described above, the S-SV 72 of each slave station can be centrally monitored by polling via B, and necessary monitoring information can be collected, and when an alarm occurs in the slave station, this information is immediately transmitted. Can be received.

FIG. 17 shows the overall configuration of the embodiment (6) of the present invention, and illustrates the case of a digital optical communication system in which an upstream signal transmission path and a downstream signal transmission path are separately provided. ing. The master station 61 and the slave station 62 are connected by an optical transmission line 65A forming a downstream signal transmission line and an optical transmission line 65B forming an upstream signal transmission line. Further, the slave station 62 is connected to another slave station (not shown) by an optical transmission line 92A forming a downlink signal transmission line and an optical transmission line 92B forming an uplink signal transmission line. The number of slave stations that can be connected in this way is arbitrary.

The master station 61 has a transmission line coupling device 73 and a master station monitoring device (M-SV) 74. M-
The SV 74 sends a monitoring signal composed of a + polarity signal and a −polarity signal from the transmission (+) and the transmission (−) to the + polarity side transmission path 68A and the −polarity side transmission path 68B on the transmission side. After that, it is connected to the transmission line coupling device 73, and the monitoring signal composed of the + polarity signal and the −polarity signal from the transmission line coupling device 73 is supplied to the reception side + polarity side transmission line 69A and the −polarity side. It is accepted for transmission (+) and transmission (-) via the transmission path 69B.

The transmission line coupling device 73 is provided with an overhead (OHB) insertion section 83 and has an M-SV74 as a main signal.
Is added as an overhead bit, an electric / optical conversion unit (E / O) 85 is provided, the electric signal from the OHB insertion unit 83 is converted into an optical signal, and the optical signal is sent to the optical transmission line 65A. . In addition, the optical / electrical conversion unit (O / E) 8
6 is provided to convert an optical signal from the optical transmission line 65B into an electrical signal, and an overhead (OHB) extraction unit 84 is provided,
The overhead bit is separated from the main signal from the O / E 86, and the monitoring signal transmitted by the overhead bit is sent to the M-SV 74.

The slave station 62 has a slave station monitoring device (S-SV) 72 and a transmission line coupling device 71. The S-SV 72 receives the monitoring signal composed of the + polarity signal and the −polarity signal from the transmission path coupling device 71 via the + polarity side transmission path 66A and the −polarity side transmission path 66B on the receiving side. Accept (+) and receive (-). Further, a monitoring signal composed of a + polarity signal and a −polarity signal from the transmission (+) and the transmission (−) is transmitted to the transmission side + polarity side transmission line 6
7A and the negative polarity side transmission line 67B, and is connected to the transmission line coupling device 71.

The transmission line coupling device 71 is provided with an optical / electrical conversion unit (O / E) 87, converts the optical signal from the optical transmission line 65A into an electric signal, and connects it to the overhead (OHB) processing unit 91. , An electrical / optical conversion unit (E / O) 89 is provided to convert the electrical signal from the OHB processing unit 91 into an optical signal and send it to the optical transmission line 92A. In addition, an optical / electrical conversion unit (O / E) 90 is provided, and an optical signal from the optical transmission line 92B is converted into an electric signal and connected to the OHB processing unit 91, and an electric / optical conversion unit (E / O) is provided. OHB processing unit 91
The electric signal from is converted into an optical signal and sent to the optical transmission line 65B.

+ Polarity side transmission path 66A, -Polarity side transmission path 6
6B, + polarity side transmission path 67A, -polarity side transmission path 67B,
And + polarity side transmission path 68A, -polarity side transmission path 68B,
The + polarity side transmission path 69A and the −polarity side transmission path 69B each form a transmission line of a four-wire telecommunications system, and a monitoring signal including a polling signal and an alarm signal is respectively converted into a symmetrical + polarity pulse. The influence of noise can be reduced by transmitting on two lines each with a digital signal consisting of a pulse with a polarity.

FIG. 18 shows an example of the structure of the OHB processing section. The OHB processing unit 91 uses the overhead (OH
B) Extraction unit 101, overhead (OHB) insertion unit 10
2, it has an overhead (OHB) insertion unit 103, an overhead (OHB) extraction unit 104, and S-SV firmware 105. FIG. 19 is a flowchart (3) of the S-SV firmware, showing software control when the present invention is applied to a digital optical communication system in which a transmission path and a reception path are separately provided. Shows.

The OHB extraction section 101 includes an optical / electrical conversion section 8
The overhead is separated from the main signal in the electric signal converted in 7, and the polling signal extracted from this is input to the S-SV 72. Each slave station can recognize that it is polling itself by the address (station number) attached to the polling signal. O
The HB inserting unit 102 inserts the alarm signal from the S-SV 72 into the overhead of the main signal together with the overhead information separated by the OHB extracting unit 104, and sends it to the electrical / optical converting unit 88. The OHB inserting unit 103 inserts the overhead information separated by the OHB extracting unit 101 into the overhead of the main signal again, and sends it to the electrical / optical converting unit 89. The OHB extraction unit 104 separates the overhead from the main signal in the electric signal converted by the optical / electrical conversion unit 90.

The S-SV firmware 105, for example, detects the polling signal of the master station 61 on the + polarity side transmission line 66A, or detects the generation of the S-SV 72 alarm signal on the + polarity side transmission line 67A, for example. At this time, the switches 106A and 106B are turned on.

When the switches 106A and 106B are turned on, the alarm signal from the S-SV 72 is connected to the OHB inserting section 102 to be inserted in the overhead of the main signal and transmitted to the master station 61.

Therefore, the M-SV7 in the master station 61 is
In the case of a digital optical communication system in which an upstream signal transmission path and a downstream signal transmission path are separately provided, 4 is the S-SV 72 of each slave station is centrally monitored by polling as described above, and required monitoring information is provided. As well as being able to collect
This information can be received immediately when an alarm occurs in the slave station.

FIG. 20 shows the overall configuration of the embodiment (7) of the present invention, and illustrates the case of a wireless communication system in which an upstream signal transmission path and a downstream signal transmission path are separately provided. There is. The master station 61 and the slave station 62 are connected by a wireless transmission line 70A forming a downlink signal transmission line and a wireless transmission line 70B forming an uplink signal transmission line. Further, the slave station 62 includes an optical transmission line 92A forming a downlink signal transmission line and an optical transmission line 92 forming an uplink signal transmission line.
B is connected to another slave station (not shown). The number of slave stations that can be connected in this way is arbitrary.

The master station 61 has a transmission line coupling device 73 and a master station monitoring device (M-SV) 74. M-
The SV 74 sends a monitoring signal composed of a + polarity signal and a −polarity signal from the transmission (+) and the transmission (−) to the + polarity side transmission path 68A and the −polarity side transmission path 68B on the transmission side. After that, it is connected to the transmission line coupling device 73, and the monitoring signal composed of the + polarity signal and the −polarity signal from the transmission line coupling device 73 is supplied to the reception side + polarity side transmission line 69A and the −polarity side. It is accepted for transmission (+) and transmission (-) via the transmission path 69B.

The transmission line coupling device 73 is provided with an overhead (OHB) insertion section 83, and has an M-SV74 as a main signal.
A monitoring signal from the OHB is added as an overhead bit, and an electric / wireless conversion unit (E / M) 93 is provided.
The electric signal from the insertion section 83 is converted into a wireless signal and sent to the wireless transmission path 70A. In addition, the wireless / electrical conversion unit (M
/ E) 94 to convert the radio signal from the radio transmission path 70B into an electric signal, and the overhead (OHB) extraction unit 8
4 to separate the overhead bit from the main signal from the M / E 94, and send the monitoring signal transmitted by the overhead bit to the M-SV 74.

The slave station 62 has a slave station monitoring device (S-SV) 72 and a transmission line coupling device 71. The S-SV 72 receives the monitoring signal composed of the + polarity signal and the −polarity signal from the transmission path coupling device 71 via the + polarity side transmission path 66A and the −polarity side transmission path 66B on the receiving side. Accept (+) and receive (-). Further, a monitoring signal composed of a + polarity signal and a −polarity signal from the transmission (+) and the transmission (−) is transmitted to the transmission side + polarity side transmission line 6
7A and the negative polarity side transmission line 67B, and is connected to the transmission line coupling device 71.

The transmission line coupling device 71 includes a wireless / electrical conversion unit (M / E) 95, converts a wireless signal from the wireless transmission line 70A into an electric signal, and connects it to the overhead (OHB) processing unit 91. , An electrical / optical conversion unit (E / O) 89 is provided to convert the electrical signal from the OHB processing unit 91 into an optical signal and send it to the optical transmission line 92A. Further, an optical / electrical conversion unit (O / E) 90 is provided, and an optical signal from the optical transmission line 92B is converted into an electric signal and connected to the OHB processing unit 91, and an electric / wireless conversion unit (E / M) is provided. 96, and converts the electrical signal from the OHB processing unit 91 into a wireless signal and sends it to the wireless transmission path 70B.

+ Polarity side transmission line 66A, -Polarity side transmission line 6
6B, + polarity side transmission path 67A, -polarity side transmission path 67B,
And + polarity side transmission path 68A, -polarity side transmission path 68B,
The + polarity side transmission path 69A and the −polarity side transmission path 69B each form a transmission line of a four-wire telecommunications system, and a monitoring signal including a polling signal and an alarm signal is respectively converted into a symmetrical + polarity pulse. -The fact that it is possible to reduce the effect of noise by transmitting on two lines each by a digital signal consisting of a pulse of polarity,
This is similar to the case of the embodiment (6).

In the embodiment (7), the OHB processing section 91
The configuration of is similar to that shown in FIG.
The flowchart of the S-SV firmware in the B processing unit 91 is the same as that shown in FIG.

Therefore, the M-SV7 in the master station 61 is
In the case of the wireless communication system in which the upstream signal transmission path and the downstream signal transmission path are separately provided, 4 is the S-SV 72 of each slave station is centrally monitored by polling as described above, and required monitoring information is collected. In addition, this information can be received immediately when an alarm occurs in the slave station.

[0126]

As described above, according to the present invention, a centralized monitoring including a plurality of slave stations for monitoring a monitoring target such as a transmission device and a master station for remotely monitoring the plurality of slave stations by polling. In the system, each slave station can immediately notify the master station of the occurrence of an alarm state in the monitored target under its control without waiting for polling from the master station, thus improving the monitoring efficiency of the centralized monitoring system. It will be possible to greatly improve.

[Brief description of drawings]

FIG. 1 is a diagram showing a principle configuration of the present invention.

FIG. 2 is a diagram showing an overall configuration of an embodiment (1) of the present invention.

FIG. 3 is a diagram showing a configuration of a transmission line coupling device in an embodiment (1).

FIG. 4 is a diagram showing an E-OR operation truth value in a relay operation unit.

FIG. 5 is a diagram showing a configuration of a master station monitoring device in an embodiment (1).

FIG. 6 is a diagram showing a configuration of a slave station monitoring device in an embodiment (1).

FIG. 7 is a diagram showing an overall configuration of an embodiment (2) of the present invention.

FIG. 8 is a diagram showing a configuration of a transmission line coupling apparatus in an embodiment (2).

FIG. 9 is a diagram showing a configuration of a master station monitoring device in an embodiment (2).

FIG. 10 is a diagram showing a configuration of a slave station monitoring device in an embodiment (2).

FIG. 11 is a diagram showing an overall configuration of an embodiment (3) of the present invention.

FIG. 12 is a diagram showing a configuration of a transmission line coupling apparatus in an embodiment (3).

FIG. 13 is a diagram showing an overall configuration of an embodiment (4) of the present invention.

FIG. 14 is a diagram showing a flowchart (1) of S-SV firmware.

FIG. 15 is a diagram showing an overall configuration of an embodiment (5) of the present invention.

FIG. 16 is a diagram showing a flowchart (2) of S-SV firmware.

FIG. 17 is a diagram showing an overall configuration of an embodiment (6) of the present invention.

FIG. 18 is a diagram illustrating a configuration example of an OHB processing unit.

FIG. 19 is a diagram showing a flowchart (3) of the S-SV firmware.

FIG. 20 is a diagram showing an overall structure of an embodiment (7) of the present invention.

FIG. 21 is a diagram showing an overall configuration of a conventional centralized monitoring system.

[Explanation of symbols]

1 Master Station 2 Slave Station 3 Transmission Line 4 Master Station Monitoring Device 5 Slave Station Monitoring Device 6 Transmission Line Coupling Device 23 + Polarity Side Transmission Line 24-Polarity Side Transmission Line 31 Pre-Signal Detection Unit 32 Pre-Signal Detection Unit 33 Relay Actuator 34 Relay 36A ₁ Optical transmission terminal 36A ₂ Optical transmission terminal 36B ₁ Radio transmission terminal 36B ₂ Radio transmission terminal 41 Transformer 42 Coupling C ₁ Capacitor R ₁ Resistor Tr ₁ Transistor 61 Master station 62 Slave station 63 Polling / Alarm signal path (+) 63A Polling signal path (+) 63B Polling signal path (-) 64 Polling / alarm signal path (-) 64A Alarm signal path (+) 64B Alarm signal path (-) 65A Optical transmission path 65B Optical Transmission line 70A Wireless transmission line 70B Wireless transmission line 71 Transmission line coupling device 72 Slave station monitoring device 8 S-SV firmware 82A S-SV firmware 91 overhead processing unit

Claims (12)

[Claims] 1. A master station (1) comprises a master station monitoring device (4), a plurality of slave stations (2) each comprises a slave station monitoring device (5), and the master station and each slave station are provided. The master station collects the monitoring information of each slave station by providing a transmission line coupling device (6) and connecting the master station monitoring device and each slave station monitoring device via the transmission line (3). In the centralized monitoring system, the master station requests the slave station to send the monitoring information of each slave station, and the slave station sends the monitoring information to the master station even when there is no such request. A remote monitoring method characterized by the following. 2. The transmission line coupling device (6) couples the master station monitoring device or the slave station monitoring device to the transmission line when a signal exists only in either the transmission line or its own station. The remote monitoring system according to claim 1, wherein: 3. A first prefix signal detection section (31), wherein the transmission path coupling device (6) detects that a specific prefix signal is sent to the transmission path and generates an output, A second front signal detector (32) that detects the occurrence of the front signal in its own station and generates an output, and only one of the first or second front signal detector. A relay operation unit (33) that detects an output generation and generates an operation signal, and a relay (34) that operates according to the operation signal to connect the master station monitoring device or the slave station monitoring device to a transmission line.
The remote monitoring system according to claim 2, further comprising: 4. The front signal is composed of a plurality of pulses transmitted prior to the signal, and the first front signal detection section (31) and the second front signal detection section (32) include: The emitter is provided with a parallel circuit of a capacitor (C ₁ ) and a resistor (R ₁ ), and a transistor (Tr ₁ ) circuit is provided for generating the output by the base input of the plurality of pulses and stopping the output after a predetermined time. The remote monitoring system according to claim 3, wherein 5. The transmission path (3) is a + polarity side transmission path (2).
3) and the negative polarity side transmission line (24), and the master station monitoring device (4) and the slave station monitoring device (5) are input with a transformer (41, 51) whose input side midpoint is grounded. In preparation for the above, information is transmitted by symmetrical + and -polarity signals in the + polarity side transmission path (23) and the-polarity side transmission path (24). The remote monitoring method according to any one of 4 above. 6. The optical transmission line station (36) for the optical signal input / output, wherein the transmission line is an optical transmission line.
A _1, 36A ₂ ) for converting an optical signal and an electric signal to each other, separating a signal of a telephone line in the electric signal and a supervisory signal from each other, and mutually transmitting the supervisory signal to the master. It is characterized in that it is connected to a station monitoring device or a slave station monitoring device, and that the first pre-signal detecting section (31) and the second pre-signal detecting section (32) are operated by the monitoring signal. The remote monitoring system according to claim 3 or 4. 7. The transmission path comprises a wireless transmission path, and the transmission path coupling device includes wireless transmission terminal stations (36B _1, 36B ₂ ) for inputting and outputting a wireless signal, and mutual conversion between a wireless signal and an electric signal. In addition, the telephone line signal in the electric signal and the monitor signal are separated and transmitted to each other, and the monitor signal is connected to the master station monitor device or the slave station monitor device, and the monitor signal The first pre-signal detector (31) and the second pre-signal detector (3)
The remote monitoring system according to claim 3 or 4, wherein (2) is adapted to operate. 8. A master station (61) comprising a plurality of slave stations (62) comprising a slave station monitoring device (72) and a transmission line coupling device (71) coupling the slave station monitoring device to a transmission line. In a centralized monitoring system in which the monitoring information of each slave station is collected via the transmission line, the master station collects the monitoring information of each slave station by making a transmission request to the slave station, and there is no transmission request. A remote monitoring method characterized in that the slave station sends monitoring information to the master station even at times. 9. A polling / alarm signal path (+) (63) and a polling / alarm signal path (-) in which the transmission path transmits the transmission request and the monitoring information by symmetrical + polarity signal and −polarity signal. ) (64)
When the transmission line coupling device (71) detects a transmission request from the master station or the occurrence of an alarm in its own station, it controls so that the monitoring information of the slave station monitoring device (72) is coupled to the transmission line. 9. A remote monitoring system according to claim 8, characterized in that it comprises firmware (82). 10. A polling signal path (+) (63A) and a polling signal path (-) (63), wherein the transmission path transmits a transmission request by symmetrical + polarity signal and -polarity signal.
B), an alarm signal path (+) (64A) and an alarm signal path (-) (64B) for transmitting the monitoring information by symmetrical + polarity signal and -polarity signal, and the transmission path coupling device ( 71), when detecting the transmission request from the master station or the occurrence of an alarm in its own station, the S-SV firmware (82A) for controlling so that the monitoring information of the slave station monitoring device (72) is coupled to the transmission path. The remote monitoring system according to claim 8, further comprising: 11. The transmission line comprises optical transmission lines (65A), (65B) for transmitting a down signal and an up signal between a master station (61) and each slave station (62), and the transmission The request and the monitoring information are inserted into the overhead of the main signal for transmission, and the transmission line coupling device (71)
Detects the transmission request from the master station or the occurrence of an alarm in the local station, the slave station monitoring device (72)
9. The remote monitoring system according to claim 8, further comprising an overhead processing unit (91) for controlling so that the monitoring information of (1) is coupled to the transmission path. 12. The transmission line comprises wireless transmission lines (70A), (70B) for transmitting a downlink signal and an uplink signal between a master station (61) and each slave station (62), and the transmission is performed. The request and the monitoring information are inserted into the overhead of the main signal for transmission, and the transmission line coupling device (71)
Detects the transmission request from the master station or the occurrence of an alarm in its own station, the slave station monitoring device (7
9. The remote monitoring system according to claim 8, further comprising an overhead processing unit (91) for controlling the monitoring information of 2) to be coupled to the transmission path.