JP2004040441A - Transmitting device and method for detecting signal communications - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmitting device by which the detection of a signal communications between terminal devices is automatically detected and is efficiently executed by remote control. <P>SOLUTION: The transmitting device comprises: a signal return means 5 having various functions based on a microprocessor, an arithmetic function, a transmission function, and an electronic switch or the like and constituting a test system for detecting the signal communications through a logic transmission line (path) L12 set between the end office equipment X1 and the end office equipment X2; a test signal generation means 6; a switching means 7, and a signal detection means 8; and a signal communications detection means 3 detecting the signal communications between the end office equipment X1, X2 by the remote control of net monitoring controller W. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a transmission apparatus for detecting a signal communication state between terminal apparatuses connected via a logical transmission path and a signal communication state detecting method thereof, and more particularly to a signal transmission method in which a terminal apparatus is connected to a terminal apparatus. The present invention relates to a transmission device that detects a communication state and a signal communication state detection method thereof.
[0002]
[Prior art]
In a conventional transmission device, when detecting a signal communication state between terminal devices, a terminal device connected to both target terminal devices is removed, and a test signal generator and a signal detector are replaced with a terminal device. Connected to output a test signal to a logical transmission path, connected to one terminal equipment, output a test signal from a test signal generator, and detected by a signal detector connected to the other terminal equipment. Are known to detect the signal communication state of the logical transmission path between the terminal devices by collating the signals.
[0003]
FIG. 5 shows a block diagram of a main part in signal transmission state detection of a conventional transmission device. In FIG. 5, a transmission device 50 includes a network monitoring and control device 51, a terminal device 52 that accommodates a terminal device 58, a terminal device 53 that accommodates a terminal device 59, and a terminal device 52 and a terminal device 53. And a logical transmission line L to be connected. In addition, although the terminal station device shows two examples of the terminal station device 52 and the terminal station device 53, the terminal device is generally composed of an arbitrary number of three or more.
[0004]
The network monitoring and control device 51 supplies a control command to the terminal devices 52 and 53, sets up a logical transmission path (path) L between the terminal devices 52 and 53, and establishes a connection between the terminal device 58 and the terminal device 59. To provide a communication line.
[0005]
The terminal devices 52 and 53 include terminal interface (I / F) units 54 and 57 for interfacing with the terminal devices 58 and 59, and demultiplexing units 55 and 56 for multiplexing and demultiplexing lines.
[0006]
When detecting a signal communication state between the terminal device 52 and the terminal device 53, the terminal device 58 connected between the terminals A1 and A2 of the terminal device 52 is removed, and the test signal generator 60 is connected to the terminal A1. And the signal detector 61 is connected to the terminal A2.
[0007]
On the other hand, the terminal device 59 connected between B1 and B2 of the terminal station device 53 is removed, the signal detector 63 is connected to the terminal B1, and the test signal generator 62 is connected to the terminal B2.
[0008]
Subsequently, when the test signal ST is output from the test signal generator 60, the test signal ST is transmitted through the path of the terminal A 1 → the terminal device 52 → the logical transmission line L → the terminal device 53, and the test is performed by the signal detector 63. When the signal ST is detected, the signal communication state is detected as normal. On the other hand, when the test signal ST is not detected by the signal detector 63, the signal communication state is detected as abnormal.
[0009]
When the test signal ST is output from the test signal generator 62, the test signal ST is transmitted through the route of the terminal B 2 → the terminal device 53 → the logical transmission path L → the terminal device 52. When ST is detected, the signal communication state is detected as normal. On the other hand, when the test signal ST is not detected by the signal detector 61, the signal communication state is detected as abnormal.
[0010]
Therefore, when the test signal ST is detected by both the signal detector 61 and the signal detector 63, the signal communication state between the terminal device 52 and the terminal device 53 is recognized as normal.
[0011]
[Problems to be solved by the invention]
When the signal transmission state between the terminal devices 52 and 53 is measured, the conventional transmission device 50 removes the terminal devices 58 and 59 connected to the terminal devices 52 and 53 and removes the test signal generators 60 and 62 and In order to perform a test by connecting the signal detectors 61 and 63, the user goes to a place where the target terminal devices (terminal devices 52 and 53 shown in FIG. 5) are installed, constructs a test system, and generates a test signal ST. The measurement of the output and signal communication state must all be performed manually, which requires a lot of time and man-hours, and there is a problem that the measurement of the signal communication state cannot be performed efficiently.
[0012]
SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a transmission device capable of automatically and efficiently detecting a signal communication state between terminal devices by remote control, and a signal transmission device therefor. An object of the present invention is to provide a communication state detection method.
[0013]
[Means for Solving the Problems]
In order to solve the above problems, a transmission device according to the present invention includes a plurality of terminal devices connected via a logical transmission path, a network monitoring control device for monitoring a network, and a terminal connected to each terminal device. In the transmission device including the devices, each terminal device is provided with signal communication state detecting means for detecting a signal communication state between the terminal devices by remote control of the network monitoring control device.
[0014]
In the transmission device according to the present invention, each terminal device is provided with signal communication state detecting means for detecting a signal communication state between the terminal devices by remote control of the network monitoring and control device. Data can be collected by automatically detecting the signal communication state between them, and efficient automatic measurement can be realized.
[0015]
Further, the signal communication state detecting means according to the present invention compares the test signal generating means for outputting the test signal to the logical transmission line with the return signal obtained by returning the test signal by another terminal device. A signal detecting means for comparing and detecting a signal communication state, a signal returning means for returning a test signal from another terminal device, and a test signal generating means and a signal detecting means for detecting a signal communication state in a logical transmission path. Switching means for automatically inserting.
[0016]
The signal communication state detecting means according to the present invention compares the test signal generating means for outputting the test signal to the logical transmission path with the folded signal obtained by folding the test signal with another terminal device. A signal detecting means for detecting a signal communication state, a signal returning means for returning a test signal from another terminal equipment, and a test signal generating means and a signal detecting means for automatically inserting a test signal generating means and a signal detecting means into a logical transmission line when a signal communication state is detected. With the switching means, a test signal is output to the logical transmission path in a state where the terminal device is connected, and a return signal in which the test signal is returned by the partner terminal device is taken in. Can be compared and collated to detect a signal communication state, automatically detect a signal communication state and collect data, and realize efficient automatic measurement.
[0017]
Further, the signal detecting means according to the present invention is characterized in that a signal communication state is detected based on a signal pattern of a test signal and a return signal.
[0018]
Since the signal detecting means according to the present invention detects the signal communication state based on the signal pattern of the test signal and the return signal, the signal pattern of the test signal and the return signal, for example, the signal bit sequence and the signal flag are matched. The signal communication state can be detected as normal, and an accurate signal communication state can be detected.
[0019]
Further, the signal detecting means according to the present invention transmits the detected signal communication state to the network monitoring and control device.
[0020]
Since the signal detecting means according to the present invention transmits the detected signal communication state to the network monitoring and control device, the network monitoring and control device can collectively manage the signal communication state data between arbitrary terminal devices collectively. Thus, management efficiency and convenience can be improved.
[0021]
Furthermore, the signal communication state detection method for a transmission device according to the present invention includes a plurality of terminal devices connected via a logical transmission path, a network monitoring control device for monitoring a network, and a connection to each terminal device. A step of automatically inserting a test system into a logical transmission path by remote control (S1) and a step of outputting a test signal to the logical transmission path (S2). Returning the test signal at the logical transmission path end to be detected (S3), detecting the signal communication state from the output test signal and the pattern of the return signal (S4), and transmitting the detected signal communication state. (S5), and detecting a signal communication state with the terminal device connected to the terminal device.
[0022]
The method for detecting a signal communication state of a transmission device according to the present invention includes a step of automatically inserting a test system into a logical transmission path by remote control (S1), and a step of outputting a test signal to the logical transmission path (S2). A step of returning the test signal at the logical transmission path end to be detected (S3), a step of detecting the signal communication state from the output test signal and the pattern of the return signal (S4), and transmitting the detected signal communication state. Since step (S5) is provided, the signal communication state can be automatically detected by remote control without changing the operation mode of the device such as disconnection of the terminal device, thereby improving the efficiency and convenience. Can be achieved.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an overall configuration diagram of a transmission apparatus according to an embodiment of the present invention. According to the present invention, each terminal device is provided with a test system (signal communication state detecting means) for detecting a signal communication state between arbitrary terminal devices. A test system (signal communication state detecting means) can be inserted into a logical transmission line without removing a terminal device, and a signal communication state can be automatically detected.
[0024]
In FIG. 1, a transmission device 1 monitors terminal devices X1 to Xn, terminal devices E1 to En connected to the terminal devices X1 to Xn, and a network that monitors and remotely controls the terminal devices X1 to Xn. It comprises a monitoring control device W and logical transmission lines L12 to Ln1 connecting the terminal devices X1 to Xn.
[0025]
The network monitoring and control device W sets logical transmission paths (paths) L12 to Ln1 in arbitrary terminal devices X1 to Xn by remote control, and provides lines to the terminal devices E1 to En. The terminal devices E1 to En perform communication via a line provided by the network monitoring control device W.
[0026]
The network monitoring and control device W controls the terminal devices X1 to Xn by remote control, inserts a test system into a logical transmission path without disconnecting the terminal devices E1 to En, It performs control to detect a signal communication state between the terminals, and collects and manages signal communication state data.
[0027]
FIG. 2 is a block diagram of a main part of an embodiment of the terminal device according to the present invention. FIG. 2 shows a state in which a logical transmission path (path) L12 is set between the terminal device X1 and the terminal device X2 by remote control of the network monitoring and control device W shown in FIG. In FIG. 2, the terminal devices X1 and X2 include a terminal interface (I / F) unit 2, a signal communication state detecting unit 3, and a multiplex division unit 4.
[0028]
The terminal interface (I / F) unit 2 matches (interfaces) electrical characteristics between the terminal station device X1 and the terminal device E1.
[0029]
The signal communication state detecting means 3 has various processing functions, arithmetic functions, transmission functions, electronic switches, etc. based on a microprocessor, and has a logical transmission path (terminal) set between the terminal device X1 and the terminal device X2. Path) A test system for detecting a signal communication state by L12 includes a signal return unit 5, a test signal generation unit 6, a switching unit 7, and a signal detection unit 8, and is remotely controlled by the network monitoring control unit W. A signal communication state between the terminal devices X1 and X2 is detected.
[0030]
The signal folding unit 5 is configured by an electronic switch such as a relay and an analog switch, and operates the switch sw1 based on a control signal SC supplied from the network monitoring and control device W. At the time of measurement of the signal communication state, the switch sw1 is in a state indicated by a solid line in the terminal device X1 in which the signal communication state detecting means 3 is inserted into the logical transmission path (path) L12. The switch sw4 of the return unit 9 operates to shunt (short-circuit) the logical transmission path (path) L12 and return the test signal ST transmitted from the terminal device X1.
[0031]
On the other hand, when the signal communication state detecting means 3 of the terminal device X2 is inserted into the logical transmission path (path) L12, the signal return means 5 of the terminal device X1 sets the switch sw1 to a state shown by a broken line, The logical transmission path (path) L12 is shunted (short-circuited) to return the test signal ST transmitted from the terminal device X2.
[0032]
The test signal generating means 6 is composed of a signal generator, generates a test signal ST when measuring a signal communication state, and supplies the test signal ST to the switching means 7 and the signal detecting means 8. The test signal ST has a signal pattern formed by a signal bit string, a signal flag, and the like, and the signal detection unit 8 detects that the folded signal SO from which the test signal ST is folded includes the same pattern. Are set to facilitate measurement of the signal communication state.
[0033]
FIG. 3 is a test signal waveform diagram of one embodiment of the test signal generating means according to the present invention. (A) shows a test signal formed by the bit string Sb, and (b) shows a test signal of data including the flag F. A test signal T having a test bit string Sb or a flag F is generated from the test signal generating means 6, and a bit string Sb or a flag F included in the return signal SO of the test signal ST returned from the partner terminal device is detected. The detection by the means 8 makes it possible to detect that the signal communication state between the terminal devices (for example, the terminal device X1 and the terminal device X2) is normal.
[0034]
The switching means 7 is constituted by an electronic switch such as an analog switch, and switches the switch sw2 and the switch sw3 based on the control signal SC supplied from the network monitoring and control device W when measuring the signal communication state (broken line display side → solid line) (Display side), the test signal generating means 6 and the signal detecting means 8 are inserted into the logical transmission path (path) L12.
[0035]
The switching unit 7 operates the switch sw2 to supply the test signal ST supplied from the test signal generation unit 6 to the multiplex division unit 4, and operates the switch sw3 to supply the test signal ST supplied from the multiplex division unit 4. The signal ST is supplied to the signal detection means 8 by the return signal SO which is returned by the signal return means 9 of the terminal device X2.
[0036]
The signal detecting means 8 has a signal comparing function, a signal collating function, and a signal transmitting function, and is a signal of the test signal ST supplied from the test signal generating means 6 and a signal of the return signal SO supplied through the switch sw3 of the switching means 7. The patterns are compared and collated. If the signal pattern (bit string Sb or flag F) of the test signal ST matches the signal pattern (bit string Sb or flag F) of the return signal SO, the terminal device X1 and the terminal station X1 are compared. It detects that the signal communication state between the devices X2 is normal.
[0037]
On the other hand, when the signal pattern (bit string Sb or flag F) of the test signal ST and the signal pattern (bit string Sb or flag F) of the return signal SO do not match, the signal between the terminal device X1 and the terminal device X2. It detects that the communication state is abnormal.
[0038]
The signal detecting means 8 converts the detected signal communication state into data, and transmits the signal communication state data to the network monitoring and control device W. The transmission of the signal communication state data from the signal detecting means 8 to the network monitoring and control device W can be performed by wire transmission or wireless transmission.
[0039]
When a plurality of terminal devices E1 are connected to the terminal device X1, the multiplex division unit 4 multiplexes the data supplied from each terminal device E1 and transmits the multiplexed data to the logical transmission line L12. Is performed to supply the multiplexed data transmitted via the terminal device to each terminal device E1.
[0040]
As described above, the transmission device 1 according to the invention detects the signal communication state between the terminal devices (for example, between X1 and X2) by the remote control of the network monitoring control device W in each of the terminal devices X1 to Xn. Since the signal communication state detecting means 3 is provided, the signal communication state between any of the terminal devices X1 to Xn can be automatically detected and data can be collected, and efficient automatic measurement can be realized. it can.
[0041]
Further, the signal communication state detecting means 3 according to the present invention includes a test signal generating means 6 for outputting the test signal ST to the logical transmission line L12, and a return of the test signal ST by the test signal ST and the other terminal device X2. A signal detecting means 8 for comparing and collapsing the folded signals SO to detect a signal communication state, a signal folding means 5 for returning a test signal ST from another terminal device X2, and a test signal when detecting a signal communication state. Since switching means 7 for automatically inserting the generating means 6 and the signal detecting means 8 into the logical transmission line L12 is provided, the test signal ST is output to the logical transmission line L12 while the terminal device E1 is connected. In the terminal device X2, the return signal SO obtained by folding the test signal ST is taken in, the test signal ST and the return signal SO are compared and collated, and the signal communication state is automatically detected to collect data. Come, it is possible to realize an efficient automatic measurement.
[0042]
Further, since the signal detecting means 6 according to the present invention detects the signal communication state based on the signal pattern of the test signal ST and the return signal SO, the signal pattern of the test signal ST and the return signal SO, for example, a signal bit sequence or a signal When the flags and the like match, the signal communication state can be detected as normal, and an accurate signal communication state can be detected.
[0043]
Further, since the signal detecting means 8 according to the present invention transmits the detected signal communication state to the network monitoring and control device W, the network monitoring and control device W collectively stores the signal communication state data between any of the terminal devices X1 to Xn. And centralized management can be performed, thereby improving management efficiency and improving convenience.
[0044]
Next, a method of detecting a signal communication state will be described with reference to FIGS. FIG. 4 is an operation flowchart of a main part of an embodiment of the signal communication state detecting method of the transmission apparatus according to the present invention. First, in step S1, a test system for detecting a signal communication state is automatically inserted into a logical transmission path (path) by remote control. The operation in step S1 is executed by the network monitoring control device W and the switching means 7.
[0045]
In step S2, a test signal ST for detecting a signal communication state is output to a logical transmission path (path). The operation in step S2 is executed by the test signal generating means 6.
[0046]
In step S3, the test signal ST is looped back at the end of the logical transmission path (path) to be detected as a signal communication state, and returned to the test system as a loopback signal SO. The operation of step S3 is executed by the signal monitoring means 9 of the network monitoring control device W and the terminal device X2.
[0047]
In step S4, a signal communication state is detected from the pattern of the test signal ST and the return signal SO. The operation in step S4 is performed by the signal detection unit 8.
[0048]
In step S5, the detected signal communication state is transmitted as signal communication state data. The operation of step S5 is executed by the signal detection means 8. Through steps S1 to S5, it is possible to detect a signal communication state in a state where the terminal device E1 is connected to the terminal device X1.
[0049]
As described above, according to the signal communication state detecting method of the transmission apparatus according to the present invention, the step S1 of automatically inserting the test system into the logical transmission path by remote control and the output of the test signal to the logical transmission path. Step S2, step S3 of returning the test signal at the logical transmission path end to be detected, step S4 of detecting the signal communication state from the output test signal and the pattern of the return signal, and transmitting the detected signal communication state. Since step S5 is provided, the signal communication state can be automatically detected by remote control without changing the operation mode of the device such as disconnection of the terminal device, thereby improving efficiency and convenience. be able to.
[0050]
【The invention's effect】
As described above, the transmission device according to the present invention includes, in each terminal device, a signal communication state detecting means for detecting a signal communication state between the terminal devices by remote control of the network monitoring control device. In addition, it is possible to automatically detect a signal communication state between arbitrary terminal devices and collect data, thereby realizing efficient automatic measurement.
[0051]
Further, the signal communication state detecting means according to the present invention compares the test signal generating means for outputting the test signal to the logical transmission line with the return signal obtained by returning the test signal by another terminal device. A signal detecting means for comparing and detecting a signal communication state, a signal returning means for returning a test signal from another terminal device, and a test signal generating means and a signal detecting means for detecting a signal communication state in a logical transmission path. Since switching means for automatic insertion are provided, a test signal is output to a logical transmission line in a state where the terminal device is connected, and a return signal in which the test signal is returned by the partner terminal device is taken in. The signal can be compared and collated, the signal communication state can be automatically detected, and data can be collected, so that efficient automatic measurement can be realized.
[0052]
Furthermore, the signal detection means according to the present invention detects the signal communication state based on the signal pattern of the test signal and the return signal, so that the signal pattern of the test signal and the return signal, for example, the signal bit sequence, the signal flag, and the like match. As a result, the signal communication state can be detected as normal, and an accurate signal communication state can be detected.
[0053]
Further, since the signal detection means according to the present invention transmits the detected signal communication state to the network monitoring and control device, the network monitoring and control device collectively manages the signal communication state data between arbitrary terminal devices collectively. This makes it possible to improve management efficiency and convenience.
[0054]
Further, according to the signal communication state detecting method for a transmission device according to the present invention, a step (S1) of automatically inserting a test system into a logical transmission line by remote control and outputting a test signal to the logical transmission line. Step (S2), a step of returning the test signal at the logical transmission path end to be detected (S3), and a step of detecting the signal communication state from the output test signal and the pattern of the return signal (S4). Since the step (S5) of transmitting the signal communication state is provided, the signal communication state can be automatically detected by remote control without changing the operation mode of the device such as disconnection of the terminal device. The efficiency and convenience can be improved.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a transmission device according to the present invention; FIG. 2 is a block diagram of a main part of an embodiment of a terminal device according to the present invention; FIG. Test signal waveform diagram of one embodiment FIG. 4 is an operation flowchart of a main part of one embodiment of a signal communication state detecting method of a transmission apparatus according to the present invention. FIG. 5 is a main part of signal transmission state detection of a conventional transmission apparatus. Block diagram [Description of reference numerals]
DESCRIPTION OF SYMBOLS 1 Transmission apparatus 2 Terminal interface (I / F) part 3 Signal communication state detection means 4 Multiplex division parts 5, 9 Signal return means 6 Test signal generation means 7 Switching means 8 Signal detection means E1 to En Terminal devices X1 to Xn Terminal stations Device W Network monitoring and control device ST Test signal SO Return signal

Claims (5)

In a transmission device including a plurality of terminal devices connected via a logical transmission path, a network monitoring control device for monitoring a network, and a terminal device connected to each terminal device,
Each of the terminal devices is provided with a signal communication state detecting means for detecting a signal communication state between the terminal devices by remote control of the network monitoring and control device. The signal communication state detecting unit compares the test signal with a test signal generation unit that outputs a test signal to a logical transmission line, and compares the test signal with a return signal obtained by returning a test signal by another terminal device, and performs signal communication. Signal detecting means for detecting a state, signal returning means for returning a test signal from another terminal device, and automatically inserting the test signal generating means and the signal detecting means into a logical transmission path when detecting a signal communication state. The transmission device according to claim 1, further comprising: a switching unit. 3. The transmission apparatus according to claim 2, wherein the signal detection unit detects a signal communication state based on a signal pattern of a test signal and a return signal. The transmission device according to claim 2, wherein the signal detection unit transmits the detected signal communication state to the network monitoring and control device. 5. A signal communication state detection method for a transmission device including a plurality of terminal devices connected via a logical transmission path, a network monitoring control device for monitoring a network, and a terminal device connected to each terminal device. So,
Automatically inserting a test system into a logical transmission path by remote control (S1);
Outputting a test signal to a logical transmission path (S2);
Returning the test signal at the logical transmission path end to be detected (S3);
Detecting a signal communication state from the output test signal and return signal pattern (S4);
Transmitting the detected signal communication state (S5);
And detecting a signal communication state in a state in which the terminal device is connected to the terminal device.

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