JP6436034B2 - Power supply control device, power supply control program, and communication device - Google Patents

Description

  The present invention relates to a power supply control device, a power supply control program, and a communication device, and can be applied to, for example, a communication device constituting an optical communication system.

  For example, when a power cut occurs in an ONU device (Optical Network Unit) configuring a PON (Passive Optical Network) system or the like, the ONU device is powered off to an OLT device (Optical Line Terminal). In order to notify this, a control signal called Dying Gasp (hereinafter referred to as Dying Gasp signal) is generated, and the Dying Gasp signal is notified to the OLT device (see Patent Document 1).

  Prior to power-off, the ONU device charges the reserve power. When the power interruption is detected, the ONU device generates a Dying Gasp signal using the charged standby power, and notifies the OLT device of the Dying Gasp signal.

  In recent years, communication devices have been required to reduce power consumption and voltage for emergency power supply such as power outages, such as power supply from USB (Universal Serial Bus) using a battery. Yes. The ONU device is also required to reduce power consumption and voltage as in the case of the communication device as described above.

  In the ONU apparatus, for example, a capacitor or the like is used as a charging device as a standby power source for notifying a Dying Gasp signal.

  Along with the reduction in power described above, when the supply voltage to the ONU device is a low voltage, there is a problem that the supply power to the charging device becomes small and the power required to notify the Dying Gasp signal is insufficient.

  The following various methods are conceivable as a method for solving the above problems.

  For example, it is a method of increasing the number of charging devices such as capacitors mounted on the ONU apparatus or increasing the capacity of the charging device. However, this method has problems such as an increase in the substrate cost due to an increase in component cost and an increase in the number of components, and an increase in cost.

  For example, as illustrated in FIG. 2, there is a method of providing a boost power supply circuit unit. In the power supply device illustrated in FIG. 2, the supply voltage 21 to the ONU device is supplied to the boost power supply circuit unit 22. The supply voltage is boosted by the boost power supply circuit unit 22, and the boosted power is supplied to the charging device 23. Thereby, the charging device 23 charges required electric power. Here, the boosting power supply circuit unit 22 requires peripheral components such as a boosting power supply IC, a transistor such as an FET (Field Effect Transistor), an inductor, and a capacitor as its components. Therefore, the power supply device illustrated in FIG. 2 increases the number of parts and the cost. In addition, the supply voltage 21 has two times of the power supply efficiency of the step-up power supply circuit unit 22 and the power supply efficiency of the step-down power supply circuit unit 24 that steps down the power once boosted to the power necessary for using the electric circuit unit 25. Conversion efficiency is added. Therefore, the power supply efficiency of the entire ONU device is reduced, and low power consumption cannot be realized.

  Furthermore, for example, there is also a power supply device including a path switching circuit unit as shown in FIG. 3 in order to improve cost increase and realize low power consumption (see Patent Document 2).

  In the method illustrated in FIG. 3, the supply voltage 31 is supplied to the step-down power supply circuit unit 34 that steps down the voltage to be used in the electric circuit unit 35, and the voltage boosted through the step-up power supply circuit unit 32 is supplied to the charging device 33. And a path b that supplies the voltage to the step-down power supply circuit unit 34 that lowers the boosted voltage to a voltage used in the electric circuit unit 35. During normal operation, the path switching circuit unit 36 switches to the path a, and low-voltage power is supplied via the path a. On the other hand, only when notifying the Dying Gasp signal, the path switching circuit unit 36 switches to the path b, and the power source power boosted from the charging device 33 is supplied via the path b.

  By using the method illustrated in FIG. 3, low power consumption can be realized without reducing the efficiency of the power supply circuit unit by supplying power without going through the boost power supply circuit unit 32 during normal operation. In addition, by switching to a power source charged with a voltage boosted to the charging device 33 when the Dying Gasp signal is notified, the power required for transmitting and receiving the Dying Gasp signal without increasing the number of components mounted on the charging device 33 Can be secured and processed.

  In the method illustrated in FIG. 3, the boost power supply circuit unit 32 is only intended for charging the charging device 33, and it is not necessary to supply power directly to the step-down power supply circuit unit 34. Therefore, it is possible to adopt a circuit unit with a small current value that can be generated, and the boost power supply circuit unit 32 can reduce components such as a small current boost power supply IC, transistors such as FETs, inductors, capacitors, etc. It can be made smaller and the cost can be reduced.

JP 2013-172404 A JP 2006-33415 A

  However, in order to realize low power, the power supply device using the path switching circuit unit as described above is difficult to detect early when a failure occurs in the components of the path switching circuit unit. . When the path switching circuit unit fails, there is a problem that, for example, a load is generated in the boosting power supply circuit unit as described below, which may affect safety.

  For example, in a normal operation, the path b may be short-circuited while the path switching circuit unit 36 is connected to the path a, and both the path a and the path b may be connected to the path switching circuit unit 36. In this case, the voltage value of the path b is higher than the voltage value of the path a. Then, the power supply voltage continues to be supplied to the step-down power supply circuit unit 34 from the step-up power supply circuit unit 32 in the path b through the charging device 33. In such a case, the boosting power supply circuit unit 32 that is intended only for charging the charging device 33 operates as the operating power of the ONU device that is not normally assumed. The step-down power supply circuit unit 34 is a circuit unit that operates when power is supplied from either the route a or the route b. Even if the path switching circuit unit 36 is supplied with power from either or both of the path a and the path b, the step-down power supply circuit unit 34 needs to continue the operation. In such a case, if the failure of the path switching circuit unit 36 cannot be detected, the ONU device continues to operate, causing an excessive load on the boost power supply circuit unit 32. In this case, there is a possibility that a safety problem may occur such that the components of the boosting power supply circuit unit 32 generate heat or generate smoke.

  Therefore, in view of the above-described problems, the present invention realizes failure detection of the path switching circuit unit at a low cost when the power supply is controlled using the path switching circuit unit, and attempts to stop safely at the time of failure. It is.

  In order to solve this problem, a power supply control device according to a first aspect of the present invention is a power supply control device for a communication device that includes a communication unit that generates a control signal and transmits the generated control signal to the opposite device. (1) A voltage adjusting unit that adjusts a supplied voltage to a working voltage of the communication unit and supplies the voltage to the communication unit, and (2) a power supply path for supplying a voltage to the voltage adjusting unit is normally supplied from an external power source. A power supply path switching unit that switches to a standby power supply path that supplies a voltage supplied from the standby power supply unit to the voltage adjustment unit when the external power supply is switched off, and (3) a power supply path; A first detection unit that detects a voltage state supplied from the switching unit to the voltage adjustment unit; (4) a second detection unit that detects a voltage state supplied from the standby power supply unit; and (5) a first The detection result by the detection unit and the second detection On the basis of the detection result by the part, characterized in that it comprises an operation control unit that controls the operation of the auxiliary power supply unit.

  A power supply control program according to a second aspect of the present invention provides a computer in a communication device including a communication unit that generates a control signal and transmits the generated control signal to the opposite device. A voltage adjusting unit that adjusts the voltage to be used and supplies it to the communication unit, and (2) a power supply path that supplies the voltage to the voltage adjusting unit, and a normal path that supplies the supply voltage from the external power supply to the voltage adjusting unit in normal times A power supply path switching unit for switching to a standby power supply path for supplying a supply voltage from the standby power supply unit to the voltage adjustment unit when the external power supply is switched off, and (3) a voltage supplied from the power supply path switching unit to the voltage adjustment unit A first monitoring unit that monitors a state; (4) a second monitoring unit that monitors a voltage state supplied from a standby power supply unit; and (5) a monitoring result by the first monitoring unit and a second monitoring unit. Based on monitoring results Te, characterized in that to function as an operation control unit for controlling the operation of the auxiliary power supply unit.

  A communication apparatus according to a third aspect of the present invention generates a control signal, transmits the generated control signal to the opposite apparatus, and controls power supplied to the communication section. And a power supply control unit as a power supply control device according to the invention.

  According to the present invention, when the power supply is controlled using the path switching circuit unit, the failure detection of the path switching circuit unit can be realized at low cost and can be safely stopped at the time of failure.

It is a block diagram which shows the internal structure of the ONU apparatus which concerns on 1st Embodiment, and the connection structure of an ONU apparatus. It is a block diagram which shows the structure of the conventional power supply device (the 1). It is a block diagram which shows the structure of the conventional power supply device (the 2). It is a flowchart which shows the operation | movement of the power supply control process in the power supply control apparatus 10 which concerns on 1st Embodiment. It is a block diagram which shows the internal structure of the ONU apparatus which concerns on 2nd Embodiment, and the connection structure of an ONU apparatus. It is a flowchart which shows the operation | movement of the power supply control process in the power supply control apparatus 10 which concerns on 2nd Embodiment.

(A) First Embodiment Hereinafter, a first embodiment of a power supply control device, a power supply control program, and a communication device according to the present invention will be described in detail with reference to the drawings.

  In the first embodiment, a case where the present invention is applied to a power supply control device mounted on an ONU device as an optical communication device constituting an optical communication system is illustrated.

(A-1) Configuration of First Embodiment FIG. 1 is a configuration diagram illustrating an internal configuration of an ONU device and a connection configuration of the ONU device according to the first embodiment.

  In FIG. 1, an ONU device 1 can be connected to an OLT device 2 via an optical line such as an optical fiber, and can be connected to a subscriber terminal 3 via a communication line, for example.

  For example, the ONU device 1 and the OLT device 2 are optical signal termination devices that constitute a PON system. The OLT device 2 is a master station device for the ONU device 1, and the ONU device 1 is a slave station device for the OLT device 2. The ONU device 1 transmits a predetermined control signal to the OLT device 2 as the opposite device in order to realize the PON system.

  In FIG. 1, an ONU device 1 operates by receiving power supply from an external power supply 101, and includes a power supply control device 10, an electric circuit unit 109 as a control unit that controls functions of the ONU device 1, and an optical transmission / reception circuit. Section 112 and LAN I / F section 113.

  The external power source 101 supplies power to the ONU device 1. In this embodiment, the case where the external power supply 101 supplies a power supply voltage having a low voltage value to the ONU device 1 will be described in order to reduce the voltage. For example, the external power supply 101 can apply power supply from a USB terminal using a battery.

  The optical transmission / reception circuit unit 112 is a communication interface unit that is connected to an optical line, receives power supply from the step-down power supply circuit unit 105, and transmits / receives optical signals including data signals and control signals.

  The LAN I / F unit 113 is a communication interface unit that is connected to a communication line, receives power from the step-down power supply circuit unit 105, and transmits and receives signals including data signals and control signals.

  The electric circuit unit 109 is a control unit that performs control processing of the ONU device 1. The electric circuit unit 109 is hardware such as an LSI or an IC, and receives a power supply from the step-down power supply circuit unit 105 to perform a control operation. The electric circuit unit 109 includes a control signal generation unit 110 and an I / F control unit 111. The control signal generation unit 110 generates a control signal related to optical communication processing with the OLT device 2. When power-off is detected, the control signal generator 110 generates a Dying Gasp signal in order to notify the OLT device 2 that the power is off. The I / F control unit 111 performs signal processing of a communication interface that exchanges signals (data) and control signals related to normal communication of the ONU device 1 with the optical transmission / reception circuit unit 112 and the LAN I / F unit 113. It is a functional part having a function and a control function.

  As shown in FIG. 1, the power supply control device 10 of the ONU device 1 includes a boost power source circuit unit 102 as a boost power source unit, a standby power source 103, a path switching circuit unit 104 as a power source path switching unit, and a voltage adjustment unit. A step-down power supply circuit unit 105, a first voltage monitoring circuit unit 106, a second voltage monitoring circuit unit 107, and a standby power supply control unit 108 as an operation control unit.

  The path switching circuit unit 104 switches to a power supply path c (hereinafter referred to as “path c”) from the external power source 101 during normal operation, and also detects a power supply path when an abnormality such as an external power interruption such as a power failure is detected. Switch to d (hereinafter referred to as “path d”). The “path c” is a path through which the supply voltage (supply power) from the external power supply 101 is supplied to the path switching circuit unit 104. The “path d” is a path through which the supply voltage from the external power supply 101 is supplied to the boost power supply circuit section 102 and the power supply voltage is supplied to the path switching circuit section 104 via the boost power supply circuit section 102 and the standby power supply 103. is there. Since the external power supply 101 supplies a low voltage, the voltage value of the path c is a low voltage. On the other hand, since the voltage is boosted by the boosting power supply circuit unit 102, the voltage value of the path d is higher than that of the path c.

  The path switching circuit unit 104 includes a power-off detection unit 104a that detects power-off from the external power source 101. During normal operation, the path switching circuit unit 104 switches to connection with the path c, and supplies the power supply voltage supplied via the path c to the step-down power supply circuit unit 105.

  Further, when the power-off detection unit 104a detects the power-off, the path switching circuit unit 104 switches the connection from the path c to the path d. In order to generate and transmit the Dying Gasp signal, the power charged by the standby power supply 103 is supplied to the path switching circuit unit 104, and the power from the backup power supply 103 is supplied to the step-down power supply circuit unit 105.

  The boosting power supply circuit unit 102 is a circuit that boosts the supply voltage from the external power supply 101 and supplies the boosted voltage to the standby power supply 103. Since it is desired to reduce the supply voltage from the external power supply 101 in order to reduce power consumption, the boost power supply circuit unit 102 boosts the supply voltage in order to increase the voltage supplied to the standby power supply 103. The step-up power supply circuit unit 102 can employ an existing circuit configuration, and includes, for example, a step-up power supply IC, a transistor such as an FET, or a circuit element such as an inductor or a capacitor.

  The standby power supply 103 is an electric device (for example, an electric circuit unit 109, an optical transmission / reception circuit unit 112, a LAN I / F unit 113, etc.) mounted on the ONU device 1 when an abnormality such as an external power supply interruption is detected, for example; (Also called each device). The standby power supply 103 is a charging device that charges power necessary for generating and transmitting a Dying Gasp signal when an external power supply interruption is detected. The standby power supply 103 is supplied with a voltage obtained by boosting the voltage value by the boosting power supply circuit unit 102 and charges a predetermined standby power value. As the standby power source 103, for example, a capacitor, a secondary battery, or the like can be applied as long as it has a charging function.

  The step-down power supply circuit unit 105 steps down the power supplied through the power supply path switched by the path switching circuit unit 104, and each device (for example, the electric circuit unit 109, the optical transmission / reception circuit unit 112, the LAN I / F unit 113). To supply. The step-down power supply circuit unit 105 is for adjusting and supplying the use voltage of each device. The step-down power supply circuit unit 105 can employ an existing circuit configuration, and includes, for example, a step-down power supply IC, a transistor such as an FET, or a circuit element such as an inductor or a capacitor.

  The first voltage monitoring circuit unit 106 monitors the power supply state to the step-down power supply circuit unit 105 and supplies the monitoring result to the standby power supply control unit 108 and the control signal generation unit 110. In order to prevent a voltage value of a voltage out of the specification range of each device (especially the electric circuit unit 109) from being supplied to each device (especially the electric circuit unit 109) and malfunctioning, the first voltage monitoring circuit unit 106 is configured to step down. It is determined whether or not the voltage value supplied to the power supply circuit unit 105 is a voltage value such that the voltage value of the supply voltage from the step-down power supply circuit unit 105 is equal to or higher than the use voltage of each device.

  The second voltage monitoring circuit unit 107 monitors the power supply state from the boost power supply circuit unit 102 and supplies the monitoring result to the standby power supply control unit 108 and the control signal generation unit 110. The second voltage monitoring circuit unit 107 determines a decrease in the supply voltage value from the boost power supply circuit unit 102 (that is, a voltage drop).

  The standby power supply control unit 108 is composed of a logic circuit, and is based on the monitoring result of the first voltage monitoring circuit unit 106 and the monitoring result of the second voltage monitoring circuit unit 107. It controls the operation. A detailed description of the processing of the standby power supply control unit 108 will be described later.

(A-2) Detailed Description of Configuration of Power Supply Control Device 10 In FIG. 1, the ONU device 1 is supplied with a low supply voltage from an external power supply 101.

  During normal operation in the ONU device 1, the path switching circuit unit 104 switches the connection to the path c. The supply voltage from the external power supply 101 is supplied to the step-down power supply circuit unit 105 via the path c. The supply voltage is stepped down by the step-down power supply circuit unit 105, and the reduced power is supplied to the electric circuit unit 109, the optical transmission / reception circuit unit 112, and the LAN I / F unit 113.

  Further, during normal operation (that is, before the power is cut off), the power boosted by the boost power source circuit unit 102 is used as a standby power source in preparation for generating and transmitting the Dying Gasp signal that the ONU device 1 notifies the OLT device 2 The standby power supply 103 is charged with power.

  When a power interruption occurs in the ONU device 1, the path switching circuit unit 104 switches the connection from the path c to the path d. Then, the voltage from the standby power supply 103 is supplied to the step-down power supply circuit unit 105 via the path d. Thereby, even when the power is cut off, the power necessary for generating and transmitting the Dying Gasp signal is continuously supplied to the electric circuit unit 109, the optical transmission / reception circuit unit 112, and the LAN I / F unit 113.

  At this time, the second voltage monitoring circuit unit 107 monitors a decrease in the supply voltage value from the standby power supply 103 in the path d. That is, the voltage drop of the boost power supply circuit unit 102 is monitored, and the monitoring result is notified to the control signal generation unit 110 and the standby power supply control unit 108.

  The control signal generator 110 generates a Dying Gasp signal when the voltage drop detection signal from the second voltage monitoring circuit unit 107 is given. The generated Dying Gasp signal is given to the optical transmission / reception circuit unit 112 via the I / F control unit 111. Then, an optical signal including the Dying Gasp signal is transmitted to the OLT device 2.

  Further, when the step-down power supply circuit unit 105 cannot generate a required voltage value in the electric circuit unit 109, the optical transmission / reception circuit unit 112, and the LAN I / F unit 113, the electric circuit unit 109 may malfunction. Therefore, the first voltage monitoring circuit unit 106 monitors the supply voltage to the step-down power supply circuit unit 105. For example, the supply voltage value to the step-down power supply circuit unit 105 is less than the use voltage value of each device. When the circuit unit 105 cannot normally generate a voltage used in each device, a signal for stopping the operation of each device (particularly, the electric circuit unit 109) is given to the control signal generation unit 110 and the standby power supply control unit. For example, if the supply voltage value to the step-down power supply circuit unit 105 is equal to or higher than the use voltage value of each device, the step-down power supply circuit unit 105 can normally generate a voltage used in each device.

  Here, it is difficult to detect a failure in the path switching circuit unit 104 itself. Assume that the path switching circuit unit 104 has failed (for example, the path d is short-circuited), and both the path c and the path d are connected to the path switching circuit unit 104. In this case, an excessive load is generated in the boosting power supply circuit unit 102, and there is a problem in safety such as smoke generation due to heat generation of components of the boosting power supply circuit unit 102.

  In this embodiment, in order to ensure the safety of the ONU device 1, the second voltage monitoring circuit unit 107 determines whether or not a voltage drop has occurred in the boost power supply circuit unit 102 after the completion of transmission of the Dying Dasp signal. To do.

  The standby power supply control unit 108 outputs an operation stop signal for stopping the operation of the boost power supply circuit unit 102 based on the monitoring result by the first voltage monitoring circuit unit 106 and the monitoring result by the second voltage monitoring circuit unit 107. To the booster power supply circuit unit 102. More specifically, the standby power supply control unit 108 uses a logic circuit (that is, by hardware) to generate a signal from the first voltage monitoring circuit unit 106 and a signal from the second voltage monitoring circuit unit 107. The logic is taken and an operation stop signal is given to the boost power supply circuit unit 102.

  When both the path c and the path d are connected to the path switching circuit unit 104 due to a failure of the path switching circuit unit 104 itself, the supply voltage value of the voltage supplied from the standby power supply 103 is lowered. In order to reduce the cost of the ONU device 1 in recent years, there is a tendency that the boosting power supply circuit unit 102 supplies only power necessary for charging the standby power supply 103. Therefore, the boost power supply circuit unit 102 tries to supply power used by each device via the step-down power supply circuit 105 as well as charging the standby power supply 103. As a result, the boosting power supply circuit unit 102 cannot step up to the originally assumed voltage value, and a voltage drop occurs. The second voltage monitoring circuit unit 107 detects the voltage drop in the boost power supply circuit unit 102 as described above.

  Next, when the monitoring result by the first voltage monitoring circuit unit 106 is such that the power supply circuit unit 105 cannot normally generate a voltage used by each device, each device (particularly the electric circuit unit 109) does not malfunction. The operation stop signal and the voltage drop detection signal of the second voltage monitoring circuit unit 107 are supplied to the standby power supply control unit 108 to take a logic to generate a signal for stopping the operation of the boost power supply circuit unit 102. . As a result, the operation of the booster power supply circuit unit 102 is stopped, so that the safety of the ONU device 1 is ensured even when the path switching circuit unit 104 fails and both the path c and the path d are connected. Can do.

(A-3) Operation of the First Embodiment Next, the operation of processing in the power supply control device 10 according to the first embodiment will be described. In the first embodiment, the boost power supply circuit unit 102 is stopped by a hardware configuration.

  FIG. 4 is a flowchart showing the operation of the power supply control process in the power supply control apparatus 10 according to the first embodiment.

  Power supply to the ONU device 1 is started from the external power source 101 (S101). By switching to the path c, the voltage from the step-down power supply circuit unit 105 to each device is stepped down to supply power (S102). In parallel with this, the power supplied from the external power supply 101 is also supplied to the boost power supply circuit unit 102 and the standby power supply 103. That is, the boosted power supply circuit unit 102 boosts the supply voltage (S103), and the standby power supply 103 is charged with power (S104).

  Next, the first voltage monitoring circuit unit 106 determines whether or not the power supply to the ONU device 1 is cut off (S105). For example, when the power is cut off, the voltage decreases, and then the path is switched by the path switching circuit unit 104 to increase the voltage. The first voltage monitoring circuit unit 106 determines that the power is cut off when such a voltage change occurs. Further, the second voltage monitoring circuit unit 107 determines whether or not a failure has occurred in the path switching circuit unit 104 itself (S106). As described above, when a failure occurs in the path switching circuit unit 104, a voltage drop in the boost power supply circuit unit 102 occurs. Therefore, the second voltage monitoring circuit unit 107 has a failure in the path switching circuit unit 104 based on the voltage drop of the boost power supply circuit unit 102 based on the determination result of the first voltage monitoring unit 106. It can be determined whether or not.

  When the power supply is not cut off (S105: No) and there is no failure in the path switching circuit unit 104 (S106: No), the ONU1 device performs normal operation. Note that the supply voltage is cut off by the first voltage monitoring circuit unit 106 and the failure of the path switching circuit unit 104 by the second voltage monitoring circuit unit 107 is continuously performed.

  When the supply power is cut off (S105: Yes), the path switching circuit unit 104 switches to the path d on the boost power source side charging the standby power source 103 from the path c (S107). After switching to the path d, the second voltage monitoring circuit unit 107 detects a voltage drop of the supply voltage from the boost power supply circuit unit 102 and the standby power supply 103 (S108), and a Dying Gasp signal is generated and transmitted (S108). S109).

  After the transmission of the Dying Gasp signal is completed, the first voltage monitoring circuit unit 106 determines whether or not the step-down power supply circuit unit 105 can generate a voltage to supply power to each device (S110). If it can be generated (S110: Yes), the standby power supply control unit 108 takes the logic of the first voltage monitoring circuit unit 106 and the second voltage monitoring circuit unit 107 and stops the boosting power supply circuit unit 102. A signal is generated and transmitted to the boosting power supply circuit unit 102 (S113). In response to this, the boost power supply circuit unit 102 stops operating (S114).

  Subsequently, when the step-down power supply circuit unit 105 cannot generate a voltage for supplying power to each device (S110: No), the first voltage monitoring circuit unit 106 generates an operation stop signal for stopping the electric circuit unit 109. And transmitted to the control signal generator 110 (S111). The control signal generator 110 shifts the ONU device 1 to a reset state and stops the operation of the ONU device 1 (S112).

  Next, the power supply is not cut off (S105: No), the failure of the path switching circuit unit 104 occurs (S106: Yes), and both the path c and the path d are connected to the path switching circuit unit 104. In this case, the second voltage monitoring circuit unit 107 determines that a voltage drop has occurred in the boost power supply circuit unit 102 (S108), and a Dying Gasp signal is generated and transmitted (S109).

  That is, when a voltage drop in the boosting power supply circuit unit 102 is detected even though the power supply path is not switched by the accounting switching circuit unit 104, a failure of the path switching circuit unit 104 occurs and the path c And the path d are considered to be connected to the path switching circuit unit 104. In this case, first, the Dying Gasp signal is generated and transmitted, and the following processing is performed after the transmission of the Dying Gasp signal is completed.

  The first voltage monitoring circuit unit 106 determines whether or not the step-down power supply circuit unit 105 can generate a voltage for supplying power to each device (S110). If it can be generated (S110: Yes), the standby power supply control unit 108 takes a logic of the first voltage monitoring circuit unit 106 and the second voltage monitoring circuit unit 107 and outputs a signal for stopping the boosting power supply circuit unit 102. Generate and transmit (S113), and stop the operation of the boosting power supply circuit unit 102 (S114). If it cannot be generated (S110: No), the first voltage monitoring circuit unit 106 transmits an operation stop signal to the control signal generation unit 110 (S111). The control signal generator 110 shifts the ONU device 1 to a reset state and stops the operation of the ONU device 1 (S112).

(A-4) Effects of the First Embodiment As described above, according to the first embodiment, as a method of detecting a failure of the path switching circuit unit and safely stopping the boost power supply circuit unit, the Dying Gasp When the voltage monitoring circuit unit for issuing a signal and the signal of the voltage monitoring circuit unit for detecting that the step-down power supply circuit unit is within the operable voltage range, When both the normal power supply path and the booster power supply side path are connected, the booster power supply circuit unit is stopped.

  Further, according to the first embodiment, the boosting power supply circuit unit is stopped after the transmission of the Dying Gasp signal is completed.

  When these methods are used, it is possible to realize a safety circuit that prevents danger such as smoke from the apparatus while suppressing an increase in cost.

(B) Second Embodiment Next, a second embodiment of the power supply control device, the power supply control program, and the communication device according to the present invention will be described in detail with reference to the drawings.

  The second embodiment also exemplifies a case where the present invention is applied to a power supply control device mounted on an ONU device as an optical communication device constituting an optical communication system.

  In the first embodiment, the case where the safety aspect of the ONU device 1 is solved by hardware using a logic circuit is illustrated. On the other hand, 2nd Embodiment illustrates the case where the safety aspect of ONU apparatus 1 is solved by software processing.

(B-1) Configuration of Second Embodiment FIG. 5 is a configuration diagram showing an internal configuration of an ONU device and a connection configuration of the ONU device according to the second embodiment.

  5 that are the same as or correspond to those in FIG. 1 according to the first embodiment are denoted by the same reference numerals.

  In FIG. 5, the power supply control device 10A of the ONU device 1 includes a step-up power supply circuit unit 102, a standby power supply 103, a path switching circuit unit 104, a step-down power supply circuit unit 105, a first voltage monitoring circuit unit 106, and a second voltage. A monitoring circuit unit 107, a standby power supply control unit 108a, and an electric circuit unit 109 are included.

  The control signal generation unit 110 in the electric circuit unit 109 generates a control signal as in the first embodiment, and the monitoring result of the first voltage monitoring circuit unit 106 and the second voltage monitoring circuit unit 107. Based on the monitoring result, there is a standby power supply control unit 108 a that stops the operation of the boosting power supply circuit unit 102.

  As in the first embodiment, the power supply control device 10A according to the second embodiment detects a decrease in the voltage value of the boost power supply circuit unit 102 by the second voltage monitoring circuit unit 107 after switching to the path d. Then, using the fact that the Dying Gasp signal is transmitted, after the Dying Gasp signal has been transmitted to the OLT device 2, a signal for stopping the boost power supply circuit unit 102 is generated, transmitted, and stopped. .

  According to the second embodiment, the standby power supply control unit 108 as a logic circuit is not necessary, so that a lower cost circuit unit can be realized.

(B-2) Operation of the Second Embodiment FIG. 6 is a flowchart showing the operation of the power supply control process in the power supply control device 10A according to the second embodiment. In FIG. 6, the same or corresponding processes as those in FIG. 4 of the first embodiment are denoted by the same reference numerals.

  Power supply to the ONU device 1 is started from the external power source 101 (S101). By switching to the path c, the voltage from the step-down power supply circuit unit 105 to each device is stepped down to supply power (S102). In parallel with this, the power supplied from the external power supply 101 is also supplied to the boost power supply circuit unit 102 and the standby power supply 103. That is, the boosted power supply circuit unit 102 boosts the supply voltage (S103), and the standby power supply 103 is charged with power (S104).

  When the power supply is not cut off (S105: No) and there is no failure in the power supply path switching circuit unit 104 (S106: No), the ONU device 1 operates normally.

  When the supply power is cut off (S105: Yes), the operations of S107 to S109 are executed. Since the operations in S107 to S109 are the same as those in the first embodiment, a description thereof will be omitted.

  Next, the first voltage monitoring circuit unit 106 determines whether or not the step-down power supply circuit unit 105 can generate a voltage to be supplied to each device (S110).

  If it can be generated (S110: Yes), the standby power supply control unit 108a determines whether or not the transmission of the Dying Gasp signal is completed (S201).

  If transmission has not been completed (S201: No), the standby power supply control unit 108a continues monitoring until transmission of the Dying Gasp signal is completed. When the transmission is completed (S201: Yes), the standby power supply control unit 108a generates an operation stop signal for stopping the boost power supply circuit unit 102 (S202), and transmits the operation stop signal to the boost power supply circuit unit 102. . In response to this, the boosting power supply circuit unit 102 stops operating (S203).

  Subsequently, when the step-down power supply circuit unit 105 cannot generate a voltage for supplying power to each device (S110: No), the first voltage monitoring circuit unit 106 generates an operation stop signal for stopping the electric circuit unit 109. Then, an operation stop signal is transmitted to the control signal generator 110 (S111). The control signal generator 110 shifts the ONU device 1 to a reset state and stops the operation of the device (S112).

  When the power supply is not cut off (S105: No), the path switching circuit unit 104 has failed (S106: Yes), and both the path c and the path d are connected to the path switching circuit unit 104. The second voltage monitoring circuit unit determines that a voltage drop has occurred in the boost power supply circuit unit 102 (S108), and a Dying Gasp signal is generated and transmitted (S109).

  The first voltage monitoring circuit unit 106 determines whether or not the step-down power supply circuit unit 105 can generate a voltage for supplying power to each device (S110).

  If it can be generated (S110: Yes), the standby power supply control unit 108a determines whether or not the transmission of the Dying Gasp signal is completed (S201).

  When the transmission is not completed (S201: No), the standby power control unit 108a continues monitoring until the transmission is completed. When the transmission has been completed (S201: Yes), the standby power supply control unit 108a generates an operation stop signal for stopping the boost power supply circuit unit 102, transmits the operation stop signal to the boost power supply circuit unit 102, and The operation of the power supply circuit unit 102 is stopped (S203).

(B-3) Effects of Second Embodiment As described above, in addition to the same effects as those of the first embodiment, the second embodiment also includes a standby power control unit as a logic circuit. Since it is not necessary, the number of parts can be reduced and the cost can be reduced.

(C) Other Embodiments Although various modified embodiments have been mentioned in the above-described embodiments, the present invention can also be applied to the following modified embodiments.

  (C-1) The first embodiment described above exemplifies a case where the operation of the boost power supply circuit unit is controlled by a logic circuit. In the second embodiment described above, the operation of the boost power supply circuit unit is performed by software processing. Although the case where it controls is illustrated, you may provide the structure of both the 1st and 2nd embodiment mentioned above.

  (C-2) The circuit configuration of each device of the ONU apparatus in the first and second embodiments described above can be widely designed as long as the operation described in the first and second embodiments can be performed. It is not particularly limited.

  (C-3) In the first and second embodiments described above, the configuration of the ONU device has been described, but the present invention can also be applied to communication terminal devices other than the ONU device. Moreover, although the case where the path switching circuit unit switches between two power supply paths has been illustrated, three or more paths may be switched.

  DESCRIPTION OF SYMBOLS 1 ... ONU apparatus, 2 ... OLT apparatus, 3 ... Subscriber terminal, 101 ... External power supply, 10 and 10A ... Power supply control apparatus, 102 ... Boosting power supply circuit part, 103 ... Standby power supply, 104 ... Path switching circuit part, 105 ... Step-down power supply circuit unit 106... First voltage monitoring circuit unit 107. Second voltage monitoring circuit unit 108 and 108 a.

Claims (5)

In a power supply control device of a communication device including a communication unit that generates a control signal and transmits the generated control signal to the opposite device.
A voltage adjusting unit that adjusts the supplied voltage to the working voltage of the communication unit and supplies the voltage to the communication unit;
The power supply path for supplying a voltage to the voltage adjusting unit is switched to a normal path for supplying a supply voltage from an external power supply to the voltage adjusting unit in a normal state. When the external power supply is turned off, the supply voltage from the standby power supply unit is A power supply path switching unit for switching to a standby power supply path to be supplied to the voltage adjustment unit;
A first detection unit for detecting a voltage state supplied from the power supply path switching unit to the voltage adjustment unit;
A second detection unit for detecting a voltage state supplied from the standby power supply unit;
A power supply control device comprising: an operation control unit that controls an operation of the standby power supply unit based on a detection result by the first detection unit and a detection result by the second detection unit. When the first detection unit does not detect power-off of the external power supply and the second detection unit detects a voltage drop in the standby power supply unit, the control unit transmits the control signal to the communication unit. Let
When the first detection unit detects that the voltage value supplied to the voltage adjustment unit after transmission of the control signal is a voltage value that the voltage adjustment unit can adjust to the use voltage of the communication unit The power supply control device according to claim 1, wherein the operation control unit stops the operation of the standby power supply unit. The power path switching unit switches to the backup power path based on the fact that the first detection unit detects a power cut of the external power source, and causes the communication unit to transmit the control signal to the opposing device.
When the first detection unit detects that the voltage value supplied to the voltage adjustment unit after transmission of the control signal is a voltage value that the voltage adjustment unit can adjust to the use voltage of the communication unit The power supply control device according to claim 1, wherein the operation control unit stops the operation of the standby power supply unit. A computer in a communication device including a communication unit that generates a control signal and transmits the generated control signal to the opposite device.
A voltage adjusting unit that adjusts the supplied voltage to the working voltage of the communication unit and supplies the voltage to the communication unit;
The power supply path for supplying a voltage to the voltage adjusting unit is switched to a normal path for supplying a supply voltage from an external power supply to the voltage adjusting unit in a normal state. When the external power supply is turned off, the supply voltage from the standby power supply unit is A power supply path switching unit for switching to a standby power supply path to be supplied to the voltage adjustment unit;
A first monitoring unit that monitors a voltage state supplied from the power supply path switching unit to the voltage adjustment unit;
A second monitoring unit for monitoring a voltage state supplied from the standby power supply unit;
A power supply control functioning as an operation control unit for controlling the operation of the standby power supply unit based on a monitoring result by the first monitoring unit and a monitoring result by the second monitoring unit program. A communication unit that generates a control signal and transmits the generated control signal to the opposite device;
A power supply control unit for controlling power supplied to the communication unit, comprising a power supply control unit as the power supply control device according to any one of claims 1 to 3.

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