JP3564483B2 - Power supply system monitoring method for optical network unit and power supply system monitoring method for optical network unit - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a power supply system monitoring method for an optical network unit and a power supply system monitoring method for the optical network unit, and more particularly, to a power supply system monitoring method and an optical subscription for an optical network unit installed in a subscriber premises. The present invention relates to a power supply system monitoring method for a user network device.
[0002]
[Prior art]
FIG. 5 shows a system configuration of an optical subscriber network. The optical subscriber network system includes an optical subscriber network device 100, a home device 200, a commercial power supply 300, a network device 400, and an optical fiber 50.
[0003]
FIG. 6 shows a configuration of a conventional optical network unit. The optical network unit comprises a network terminating unit 10, an incoming / outgoing call activation control unit 20, and a power supply unit 30.
[0004]
The network terminating unit 10 includes a home device interface unit 11, a line terminating unit 12, and an electrical / optical conversion unit 13. The home device interface unit 11 provides an interface such as a telephone and ISDN. The line terminating unit 12 performs frame conversion, speed conversion, and code conversion for transmitting information / signals from the home device interface unit 11 to the optical fiber transmission line 50. The electrical / optical conversion unit 13 performs electrical / optical conversion of the electrical signal from the line termination unit 12 and transmits / receives an optical signal to / from the network device 400 via the optical fiber 50.
[0005]
In general, a public communication line such as a telephone line and an ISDN line has a relatively low call rate, and the ratio of time during which the line is communicating within a predetermined time is several percent or less. Therefore, in an optical network unit that provides public communication services such as telephone lines and ISDN lines, the network terminating unit 10, which is a main circuit part, is stopped during non-communication, and the network is activated only during communication. The method is adopted. As a result, the average power consumption of the device can be reduced, and the backup battery capacity can be reduced (see, for example, K. Kumozaki et al .: "Functional structure of the fiber-optic passive double star system," IEICE Transactionon Communications, vol.E-75-B, No.9, pp.832-840, September 1992.).
[0006]
The outgoing / incoming call activation control unit 20 includes an outgoing call detecting unit 21, an initiating control unit 22, and an incoming call detecting unit 23. Here, in the case of non-communication, it is assumed that the network terminating unit 10 is stopped. If there is a call here, a call signal is sent from the home device 200 to the optical network unit. At this time, since the network terminating unit 10 is stopped, the call signal is detected by the call detection unit 21 of the call-in / call-out start control unit 20. When detecting the call signal, the call detection unit 21 transfers the call detection signal to the activation control unit 22. Upon receiving the call detection signal, the activation control unit 22 sends an activation signal to the home equipment interface unit 11, the line termination unit 12, and the electrical / optical conversion unit 13 of the network termination unit 10, and the network termination unit 10 is activated, Communication between the home device 200 and the network device 400 is started. In terms of device realization, the outgoing call detecting unit 21 of the outgoing / incoming call starting control unit 20 can be configured as a part of the home device interface unit 11.
[0007]
On the other hand, when there is an incoming call during non-communication, an incoming call signal is sent from the network device 400 to the optical network unit 100. At this time, since the network terminating unit 10 is stopped, the incoming call signal is detected by the incoming call detecting unit 23 of the outgoing / incoming call activation control unit 20. Upon detecting the incoming call signal, the incoming call detection section 23 transfers the incoming call detection signal to the activation control section 22. Thereafter, as in the case of calling, the network terminating unit 10 is activated, and communication between the in-home device 200 and the network device 400 is started. In addition, the incoming call detection unit 23 can be configured as a part of the electric / optical conversion unit 13 for realizing the device.
[0008]
The power supply unit 30 includes an AC / DC conversion unit 31, a backup battery 32, and a DC / DC conversion unit 33. The AC / DC converter 31 performs AC / DC conversion of a commercial AC power supply (AC 100 V) from the commercial power supply 300, outputs a DC voltage to the DC / DC converter 33, and charges the backup battery 32 at the same time. The DC / DC converter 33 converts an input DC voltage into a required voltage and supplies power to each unit of the optical network unit 100. When the commercial power supply 300 is cut off due to a power failure or the like, power is supplied from the backup battery 32 to the DC / DC converter 33.
[0009]
[Problems to be solved by the invention]
However, in the above-mentioned conventional optical network unit, the commercial power supply is cut off due to a power failure or the like, and the network-side device cannot recognize that it is operating with the backup battery. Further, during operation by the backup battery, power supply to the optical network unit is stopped due to discharge of the backup battery with the passage of time, and the optical network unit stops operating. In such a case, in the network side device, the commercial power supply is cut off due to a failure of the optical subscriber network device or a power failure, etc., and after the operation with the backup battery, the optical subscriber network device operates due to the discharge of the backup battery. There is a problem that it is not possible to identify whether it has stopped.
[0010]
Furthermore, when the commercial power supply is cut off or the backup battery is discharged during non-communication, the optical network unit is in a stopped state, and the network side device cannot recognize the abnormality of these power supply systems. There is also.
[0011]
As described above, in the conventional optical network unit, it is not possible to directly monitor an abnormality in the power supply system due to the interruption of the commercial power supply and the discharge of the backup battery from the network side, and there is a problem in maintenance operation.
[0012]
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and solves the above-described conventional problems. It enables a network-side device to remotely monitor whether a power supply system is abnormal or a device has failed. It is an object of the present invention to provide a power supply system monitoring method for an optical network unit, which can enhance the performance.
[0013]
[Means for Solving the Problems]
In the power supply system monitoring method for an optical subscriber network apparatus according to the present invention, a network termination unit 10 for terminating an optical subscriber line and providing a home device interface, and controlling activation of a network termination unit in response to an outgoing call and an incoming call. An incoming / outgoing call activation control unit 20 and a power supply unit 30 that supplies commercial power to the network termination unit 10 and supplies required power to the incoming / outgoing call activation control unit 20 and supplies power from the backup battery 32 when the commercial power supply fails. In the optical subscriber network device 100 configured as described above, when power is supplied from the commercial power supply 300 or the backup battery 32, the commercial power supply voltage or the backup battery voltage is lower than a predetermined value, and the network termination unit If 10 is communicating, a notification that the voltage is low is sent to the network termination unit. 0 to the network-side device 400, if the network terminating unit 10 is not communicating, activates the incoming / outgoing call activation control unit 20 and informs the network via the network terminating unit 10 of the notification that the voltage has dropped. Notify the local device 400.
[0014]
The present invention also provides a network terminating unit 10 for terminating an optical subscriber line and providing a home device interface, an outgoing / incoming call activation control unit 20 for controlling activation of the network terminating unit 10 in response to an outgoing call and an incoming call, An optical subscriber network device comprising a power supply unit 30 which receives a commercial power supply and supplies necessary power to a network terminating unit and an incoming / outgoing call activation control unit 20 and supplies power from a backup battery when the commercial power supply fails. At 100, the voltage of the commercial power supply 300 is monitored, and if the voltage drops below a prescribed value, the commercial power supply warning transmitting means for transmitting a commercial power supply warning signal to the network terminating unit 10 and the voltage of the backup battery are monitored and regulated. When the voltage drops below the value, a backup battery alarm signal is sent to the network termination unit 10. Tsu includes a power supply unit 30 and a click-up battery alarm sending means, and a network termination unit 10 to be transferred from the power supply unit 30 to the commercial power supply alarm signals and a backup battery alarm signal to the network side device 400.
[0015]
In addition, the power supply unit 30 monitors the voltage of the commercial power supply 300 during non-communication, and when the voltage drops below a specified value, sends a start request signal to the call origination / incoming call start control unit 20 and the network termination unit 10 And a signal transmitting means for transmitting a commercial power alarm signal to the backup battery, and monitors the voltage of the backup battery. Sends a backup battery alarm signal.
[0016]
[Action]
The present invention, in the optical network unit, monitors the voltage of the commercial power supply and the backup battery, and when the voltage drops below a specified value, sends a commercial power supply alarm signal and a backup battery alarm signal to the network device, By receiving these signals, the network-side device can grasp the state of the optical network unit.
[0017]
Further, during non-communication, when the voltage of the commercial power supply or the backup battery drops to a voltage lower than a specified value, the optical network unit is started autonomously, and the commercial power supply alarm signal and the backup battery alarm signal are transmitted to the network. By transmitting the abnormality to the side device, an abnormality in the power supply system due to the interruption of the commercial power supply and the discharge of the backup battery can be directly monitored from the network side, thereby realizing improvement of the maintenance operability.
[0018]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0019]
FIG. 1 is a configuration diagram of an optical subscriber network device according to one embodiment of the present invention. 5, the same components as those of FIG. 5 are denoted by the same reference numerals, and the description thereof will be omitted. The system shown in FIG. 1 has a configuration in which a voltage monitoring unit 34 and signal lines a, b, c, and d are added to the configuration of the power supply unit 30 in FIG. The signal line a sends voltage information from the commercial power supply 300 to the voltage monitoring unit 34. The signal line b sends the voltage information from the backup battery 32 to the voltage monitoring unit 34. The signal line c is a signal line for transmitting an alarm signal from the voltage monitoring unit 34 of the power supply unit 30 to the line termination unit 12 of the network termination unit 10. The signal line d is a signal line for sending an activation signal from the voltage monitoring unit 34 of the power supply unit 30 to the activation control unit 22.
[0020]
The voltage monitoring unit 34 monitors the voltage of the commercial power supply 300 via the signal line a and the voltage of the backup battery 32 via the signal line b. When the commercial power supply voltage drops to a voltage lower than the specified value due to a power failure or the like, a commercial power supply alarm signal is transmitted to the line termination unit 12 via the signal line c. When the backup battery voltage is reduced to a voltage equal to or lower than a specified value due to the discharge of the backup battery 32 with the passage of time, the optical network unit 100 is notified via the signal line c to notify the network side device 400 that the optical network device 100 will be stopped soon. And sends a backup battery alarm signal to the line terminating unit 12. The line termination unit 12 multiplexes the commercial power supply alarm signal and the backup battery alarm signal from the voltage monitoring unit 34 into an upstream frame, and sends out the multiplexed signal to the optical fiber transmission line 50 via the electric / optical conversion unit 13.
[0021]
On the network side, by receiving the commercial power supply alarm signal, it is recognized that an abnormality has occurred in the commercial power supply and that the optical network unit 100 is operating on the backup battery. If the abnormality of the commercial power supply does not recover, the communication is assumed to be interrupted after the backup time of the backup battery 32 elapses, so that a preventive maintenance measure can be taken.
[0022]
Further, by receiving the backup battery alarm signal on the network side, it is possible to know that the discharge of the backup battery progresses and that the optical network unit 100 will be stopped soon. Therefore, if the communication is interrupted after the backup battery alarm signal is received, the network-side maintenance person can recognize that the communication becomes possible due to the recovery of the commercial power supply instead of the device failure.
[0023]
Next, an operation during non-communication will be described. At the time of non-communication, since the network terminating unit 10 is stopped, a commercial power supply warning signal or a backup battery warning signal is transferred from the voltage monitoring unit 34 to the line terminating unit 12 via the signal line c due to an abnormality in the power supply system. However, these signals are not transmitted to the network device 400. Therefore, when an abnormality in the power supply system is detected during non-communication, it is necessary to autonomously activate the network terminating unit 10.
[0024]
In FIG. 1, when the voltage monitoring unit 34 detects a power supply abnormality of the commercial power supply 300 or the backup battery 32, it sends out a commercial power supply warning signal or a backup battery warning signal on a signal line c and a start request signal on a signal line d. Is sent. When the activation control unit 22 receives the activation request signal from the voltage monitoring unit 34, the home appliance interface unit 11, the line termination unit 12, and the electric / optical unit of the network termination unit 10 as in the case of calling or activating a call. A start signal is sent to the conversion unit 13 to start the network termination unit 10. After starting the network terminating unit 10, the line terminating unit 12 multiplexes the commercial power supply alarm signal and the backup battery alarm signal from the voltage monitoring unit 34 into an upstream frame and transmits the multiplexed signal to the optical fiber transmission line 50 via the electric / optical conversion unit 13. Send out.
[0025]
FIG. 2 is a block diagram showing a configuration of the voltage monitoring unit 34 according to one embodiment of the present invention. The voltage monitoring unit 34 shown in the figure includes a commercial power supply voltage comparison unit 341, a backup battery voltage comparison unit 342, a communication / non-communication determination unit 343, an alarm signal generation unit 345, and a start signal generation unit 346.
[0026]
Here, during the communication, when the voltage value V _a from the commercial power source 300 from the signal line a is input to a commercial power source voltage comparator 341, a commercial power source voltage comparator 341, and a predetermined commercial power supply voltage V _amin Then, it is determined whether or not the input voltage value Va is lower than _a predetermined commercial power supply voltage value _Vamin . The communication / non-communication determining unit 343 determines whether or not a communication state is established. If the communication state is established and the input voltage value Va is lower than _a predetermined commercial power supply voltage value _Vamin , an alarm signal is generated. The unit 345 generates an alarm signal of the commercial power supply and sends it to the line termination unit 12 via the signal line c.
[0027]
Further, when the voltage value V _b from the backup battery 32 from the signal line b is input to the backup battery voltage comparing unit 342, the backup voltage comparator 342 compares a predetermined backup battery voltage value, input voltage value V _b determines whether lower than the voltage value V _bmin predetermined backup battery. The communication / non-communication determining unit 343 determines whether or not the communication is in the communication state, and determines whether the communication is in the communication state and the input voltage value V _b. Is lower than a predetermined backup battery voltage value _Vbmin , an alarm signal of the backup battery is generated in the alarm signal generation unit 345 and sent to the line termination unit 12 via the signal line c.
[0028]
At the time of non-communication, when the voltage value Va from the commercial power supply 300 is input to the commercial power supply voltage comparison unit 341 from the signal line a, the commercial power supply voltage comparison unit 341 compares the voltage value Va with _a predetermined commercial power supply voltage value _Vamin. It is determined whether the input voltage value Va is lower than _a predetermined commercial power supply voltage value _Vamin . In the communication and non-communication determination unit 343 determines whether a non-communicating state, a non-communicating state, when the voltage value V _a that is input is lower than a predetermined commercial power supply voltage V _amin is activated The signal generation unit 346 generates an activation signal for activating the activation control unit 22 of the outgoing / incoming call activation control unit 20 and sends it to the activation control unit 22 via the signal line d. Thus, the activation control unit 22 activates the home device interface unit 11, the line termination unit 12, and the electric / optical conversion unit 13, and notifies the network side device of the abnormal state of the commercial power supply 300.
[0029]
Further, the signal line backup battery 32 voltage value than b is inputted to the backup battery voltage comparing unit 342, the backup battery comparing unit 342 compares a predetermined backup battery voltage value V _bmin, the voltage value V _b which is input Is lower than a predetermined backup battery voltage value _Vbmin . The communication / non-communication determining unit 343 determines whether or not the communication is in a non-communication state. If the communication / non-communication is in the non-communication state and the input voltage value _Vb is lower than a predetermined backup battery voltage value _{Vbmin, the} communication / non-communication determination unit 343 is activated. The signal generation unit 346 generates an activation signal for activating the activation control unit 22 of the outgoing / incoming call activation control unit 20 and sends it to the activation control unit 22 via the signal line d. Thereby, the activation control unit 22 activates the home device interface unit 11, the line termination unit 12, and the electric / optical conversion unit 13, and notifies the network side device of the abnormal state of the backup battery 32.
[0030]
Further, as described above, the present invention monitors the voltages of the commercial power supply 300 and the backup battery 32 in the optical network unit from the signal lines a and b. By transmitting a signal and a backup battery alarm signal, the network side device 400 can directly recognize an abnormality in the power supply system when the commercial power is turned off and the backup battery is discharged.
[0031]
Furthermore, the optical network unit 100 is activated when a power supply abnormality occurs so that an alarm signal can be transmitted even during non-communication when the optical network unit is stopped, and a commercial power alarm signal and a backup battery alarm signal are output. Can be sent.
[0032]
Further, the power supply unit 30 is not limited to the configuration of the above-described embodiment, but may be any configuration that operates as follows.
[0033]
FIG. 3 is a flowchart illustrating the operation of the power supply unit according to one embodiment of the present invention.
[0034]
It is determined whether the power currently being supplied to the power supply unit 30 is supplied from the commercial power supply 300 or from the backup battery 32 (step 1). If the commercial power supply voltage V _a is a predetermined value V _amin below (V _a ≦ V _amin) (step 2, Yes), generating the commercial power alarm signal (step 3). At this time, if the network terminating unit 10 is in the non-communication state (step 4), it generates an activation request signal and transmits the activation request signal to the call origination / incoming call activation unit 20 (step 5). If the network terminating unit 10 is in the communication state, the processing of step 5 is skipped. The commercial power warning signal generated in step 3 is sent to the network terminating unit 10 (step 6).
[0035]
On the other hand, in step 1, when the power supplied to the power supply unit 30 is from the backup battery 32, if the backup battery voltage _Vb is equal to or lower than the predetermined value _Vbmin ( _Vb ≦ _Vbmin ), (Step 7, Yes), a backup battery alarm signal is generated (Step 8). At this time, when the network terminating unit 10 is in the non-communication state (step 9), the network terminal 10 generates an activation request signal and transmits the activation request signal to the calling / incoming call activation unit 20 (step 10). If the network terminating unit 10 is in the communication state, the process of step 10 is skipped. The backup battery alarm signal generated in step 8 is sent to the network termination unit 10 (step 11).
[0036]
FIG. 4 shows an example of operation at the time of a power supply system failure according to one embodiment of the present invention. In the figure, V _anon a commercial power supply standard voltage value, V _amin commercial power supply minimum reference voltage value, V _Bnom backup battery standard voltage value, V _bmin is backup battery minimum reference voltage value. In the figure, at time q the commercial power supply voltage V _a is lower than the minimum reference value V _amin, commercial power alarm is outputted, thereafter switched to the backup battery (r). At time s, if the backup battery power supply voltage _Vb becomes lower than the backup battery minimum reference voltage value _Vbmin , a backup battery alarm is output. Thereafter, the apparatus is in a stopped state for a time t until restoration. After the commercial power is restored at the time point u ', the device operates normally using the commercial power. Further, the backup battery has been consumed for the time t, but since the commercial power has been restored to normal from the time point u, the backup battery voltage _Vb returns to the standard voltage value.
[0037]
As described above, when the voltage of the commercial power supply drops, it is possible to notify the network-side device 400 via the network termination unit 10 that an abnormality has occurred in the commercial power supply, Is lower than the threshold value, the fact that an abnormality has occurred in the backup battery can be similarly notified to the network device 400 via the network terminating unit 10. Further, even when the optical network unit 100 is not in communication, after the incoming / outgoing call activation control unit 20 is activated when the voltage of the commercial power supply or the voltage of the backup battery decreases, the power supply abnormality is notified to the network side apparatus 400. , The network-side device can grasp the cause of the abnormality.
[0038]
【The invention's effect】
As described above, according to the present invention, it is possible for the network-side device to remotely monitor whether the commercial power supply is abnormal or the device is faulty when the optical network device is stopped. Accordingly, measures such as preventive maintenance measures can be taken, and maintenance operability can be improved.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an optical subscriber network device according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration of a voltage monitoring unit according to one embodiment of the present invention.
FIG. 3 is a flowchart showing an operation of the power supply unit according to one embodiment of the present invention.
FIG. 4 is a diagram showing an example of an operation at the time of a power supply system failure in a position embodiment of the present invention.
FIG. 5 is a configuration diagram of an optical subscriber network system.
FIG. 6 is a configuration diagram of a conventional optical subscriber network device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Network terminating part 11 In-home equipment interface part 12 Line terminating part 13 Electric / optical conversion part 20 Incoming / outgoing call starting control part 21 Outgoing call detecting part 22 Starting control part 23 Incoming call detecting part 30 Power supply part 31 AC / DC converting part 32 Backup Battery 33 DC / DC conversion unit 34 Power monitoring unit 50 Optical fiber 100 Optical network unit 200 Home equipment 300 Commercial power supply 400 Network-side device

Claims (3)

A network terminator for terminating an optical subscriber line and providing a home equipment interface; an incoming / outgoing call activation control unit for controlling activation of the network terminating unit in response to an outgoing / incoming call; in utility power failure to supply the required power to the parts and the incoming and outgoing call start control unit, the optical network unit composed of a power supply unit for supplying power by a backup battery,
The commercial power source or, if the power supply from the backup battery is supplied, and the commercial power supply voltage or the backup battery voltage is lower than a predetermined value, if and the network terminating unit is communicating, lowering the voltage the in which notification to notify the network side device via the network termination unit,
If the network terminating unit is not communicating, the calling / incoming / outgoing call activation control unit is activated, and a notification that the voltage is reduced is notified to the network device via the network terminating unit. Power supply system monitoring method for user network equipment. A network terminator for terminating an optical subscriber line and providing a home equipment interface; an incoming / outgoing call activation control unit for controlling activation of the network terminating unit in response to an outgoing / incoming call; supplies the required power to the parts and the incoming and outgoing call start control unit, the commercial power supply in the event of failure, the optical network unit composed of a power supply unit for supplying power by a backup battery,
Monitors the voltage of the commercial power source, when reduced to a voltage below the specified value, and the commercial power supply alarm sending means for sending a commercial power alarm signal to the network termination unit, monitors the voltage of the backup battery, below the specified value A power supply unit having backup battery alarm sending means for sending a backup battery alarm signal to the network termination unit when the voltage drops to
Power system monitoring system of an optical subscriber network system which comprises a network termination unit to be transferred from the power supply unit to the commercial power supply alarm signal and said backup battery alarm signal to the network side device. The power supply unit includes:
At the time of non-communication, the voltage of the commercial power supply is monitored, and when the voltage drops below a specified value, a start request signal is sent to the call origination / call initiation control unit and a commercial power alarm signal is sent to the network termination unit. Signal sending means;
3. The method according to claim 2, wherein the backup battery voltage is monitored, and when the voltage drops to a voltage lower than a prescribed value, a backup request signal is transmitted to the call origination / termination call control unit and a backup battery alarm signal is transmitted to the network termination unit. A power supply system monitoring method for optical network units.

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