JPH09247050A - Communication equipment of redundant constitution - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication equipment with redundant constitution which can reduce current consumption at the time of a power cut for long time while operation reliability is maintained as it is even when a commercial AC power is instantaneously cut. SOLUTION: In the radio equipments 5A and 5B of redundant constitution, DC power is supplied from a rectifying circuit 1 converting commercial AC current into DC power and a battery 2 being the backup of the rectifier circuit 1 to a power source part 4. When the voltage of the battery 2 drops lower than prescribed voltage, a battery voltage monitor part 2 transmits a voltage drop signal S1 to relay control parts 52A and 52B. If the voltage drop signal S1 is transmitted when the radio equipment 5A is an operation system, the relay control part 52B of a standby system off-controls a relay 51B and stops power supply from the power source part 4 to a main circuit 53B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a redundant-structured communication device, and more particularly to a redundant-structured communication device that receives power from a commercial AC power supply and a backup battery.

[0002]

2. Description of the Related Art One of the conventional communication devices of this type is a radio device provided in a base station of a car telephone system. This type of wireless device uses DC power from a rectifier that converts commercial AC power to DC power and a battery that is charged by the rectifier as input to a circuit power supply. In the event of a power failure of the commercial AC power supply, DC power is supplied from the backup battery to the circuit power supply, so that the wireless device does not stop functioning. Further, the wireless device adopts a hot standby configuration of N: 1 (N is an integer including 1) redundancy, and when a failure occurs in the active wireless device, the standby wireless device substitutes its function to improve system reliability. It was improving. However, when the commercial AC power supply fails and DC power is supplied from the battery to the circuit power supply, power is also supplied to the standby wireless device that does not provide the car telephone service. That is, there is a drawback that the time to system down is shortened.

A means for solving the above-mentioned drawbacks is disclosed in JP-A-57-57.
This is shown in the exchange disclosed in Japanese Patent Publication No. 79757.
In this exchange, when the commercial AC power supply is cut off, the power supply to the standby system is stopped and the DC power is supplied only from the battery to the operation system.

[0004]

However, in the disclosed exchange, since the power supply to the standby system is stopped by judging the disconnection of the commercial AC power supply, the commercial AC power supply has a tens of tens.
Even in the case of an instantaneous power failure of about 0 millisecond, or when the voltage fluctuation of the commercial AC power supply is large, the power supply to the standby system is stopped. Therefore, IPL (Initial
CP launched by Program Loading)
In a wireless device for a mobile phone, which is generally equipped with U and has a redundant configuration, if the disclosed technology is applied, it takes a long time to restart after the commercial AC power is restored, and There is a problem that the operational reliability of the telephone system is reduced.

Therefore, an object of the present invention is to provide a rectifying device for rectifying commercial AC power to DC power and a wireless device for a car telephone which is supplied with circuit power from a battery charged with the DC power and has a redundant configuration. In the communication device,
The drawbacks of the conventional technology described above are solved, and the current consumption from the battery is reduced while maintaining the operation reliability even during the momentary power failure of the commercial AC power supply, and the time until the system goes down is extended. It is to provide a method of reducing current consumption that can increase the efficiency.

[0006]

A communication device having a redundant configuration according to the present invention includes a rectifier circuit for converting commercial AC power into DC power, a battery charged by the rectifier circuit, a DC voltage from the rectifier circuit and the battery. In a redundant configuration communication device including a redundant configuration communication circuit in which electric power is supplied to a circuit power supply, power supply control means for stopping power supply to a standby circuit of the communication circuit when the voltage of the battery drops below a predetermined voltage. Equipped with.

The redundant-structured communication device may have a configuration in which the standby system circuit performs a hot standby operation when the commercial AC power is supplied to the rectifier circuit.

In the communication device having the redundant configuration, the power supply control means generates a voltage drop signal when the voltage drop of the battery is detected, and the standby system circuit from the circuit power supply when the voltage drop signal is received. And a power supply stop circuit for stopping the power supply to the device.

Since the redundant communication device according to the present invention detects the voltage drop of the battery and stops the power supply to the standby system, the power supply to the standby system is stopped when the commercial AC power is momentarily interrupted. Redundant configuration can be maintained. On the other hand, this communication device stops the power supply to the standby system upon knowing the voltage drop of the battery in case of a power failure for a long time, so that the current consumption of the battery can be reduced and the communication device stops functioning. The time until can be extended.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a communication device according to an embodiment of the present invention, showing a wireless device installed in a base station of a car telephone system.

It is assumed that this communication device has a 1: 1 redundancy configuration, in which the wireless device 5A is an active system and the wireless device 5B is a hot standby standby system (also called a standby system).
The rectifier 1 rectifies commercial AC power from the commercial AC power source to generate DC power (voltage -48V). The DC power from the rectifier 1 charges the battery (BAT) 2 and is supplied to the power supply unit 4. Power supply unit 4 generates DC power (voltage + 5V) required for operation of main circuits 53A and 53B in wireless devices 5A and 5B. During the hot standby operation, the output of the power supply unit 4 is output via the main circuit 53 via the built-in relays 51A and 51B of the wireless devices 5A and 5B.
A and 53B.

Here, the wireless devices 5A and 5B have the same function. Further, the circuits incorporated in the wireless devices 5A and 5B also have the same function. That is, the relays 51A and 52B, the relay control units (RLC) 52A and 52B,
The main circuits 53A and 53B and the fault monitoring unit (ALM) 54A and 54B have the same function, respectively. Each of the main circuits 53A and 53B fulfills a main function of the wireless devices 5A and 5B, respectively. The operating system of the wireless devices 5A and 5B performs, for example, transmission / reception of radio signals with the car telephone terminal, communication channel allocation control with the car telephone terminal, transmission / reception of wired signals with the host station, and the like. To do. However, the wireless devices 5A and 5B are assigned to the active system and the standby system, respectively, according to the initial settings and the presence / absence of a failure.

Since the wireless device 5A is now the active system, the fault monitoring unit (ALM) 54A monitors the state of the main circuit 53A, and the fault state of the main circuit 53A is monitored by the monitoring signal S2A. The relay control unit (RLC) 52A. And the fault monitoring unit (ALM) 54B of the redundant wireless device 5B. That is, when the main circuit 53A of the wireless device 5A is out of order, the failure monitoring unit 54A detects the failure and sends the monitoring signal S2Aa indicating the failure to the relay control unit 52A and the failure monitoring unit of the standby wireless device 5B ( ALM) 54B and stops the operation of the main circuit 53A. Further, when the failure monitoring unit 54B of the wireless device 5B that has been the standby system receives the monitoring signal S2Aa, it activates the main circuit 53B to make this wireless device 5B the active system.

Here, if the commercial AC power supply fails when the wireless devices 5A and 5B are not in failure, the rectifying device 1 stops the output of DC power, but the battery 2 that has been charged by the rectifying power source 1 up to that time is DC power is supplied to the power supply unit 4 instead of the rectifier 1, and the wireless devices 5A and 5B operate while maintaining the redundant configuration. After that, when the commercial AC power supply is interrupted for a long time, the voltage of the battery 2 starts to drop due to the discharge of the battery 2. When the battery 2 drops more than a predetermined voltage, the battery voltage monitoring unit (V-MON) 3 detects this voltage drop and outputs the voltage drop signal S1 to the relay control units 52A and 5A of the wireless devices 5A and 5B.
2B.

The relay control unit 51A controls ON / OFF of the relay 51A in response to the voltage drop signal S1 and the monitoring signal S2A from the fault monitoring unit 54A.
That is, the relay control unit 52A turns off the relay 51A and simultaneously supplies the power from the power supply unit 4 to the main circuit 53A in a state where the voltage drop signal S1 and the monitoring signal S2Aa indicating that the main circuit 53A is in failure are simultaneously received. The relay 51A is stopped and the relay 51A is turned on in the states other than the above. Relay control unit 5
1B, like the relay control unit 51A, the voltage drop signal S
1 and ON / OFF control of the relay 51B in response to the monitoring signal S2B from the fault monitoring unit 54B. The relays 51A and 51B, the relay control units 52A and 52B, and the monitoring control units 54A and 54B consume a small amount of current and are therefore constantly supplied with power from the power supply unit 4.

Now, the relay control unit 52B of the standby radio unit 5B has the fault monitoring unit 54A of the active radio unit 5A.
When the voltage drop signal S1 is received in addition to the monitoring signal S2Ab indicating no fault from the above, the relay 51B is controlled to be turned off to stop the power supply to the main circuit 53B. That is, in addition to the monitoring signal S2Ab indicating that the operation system is normal, the standby system failure monitoring unit 54B adds the voltage drop signal S1.
When receiving the signal, the power supply to the main circuit 53B is stopped, and the wireless device 5B shifts to the cold standby state. When the commercial AC power supply is out of power for a short time, the battery voltage monitoring unit 3 does not detect the voltage drop of the battery 2 to the extent that the voltage drop signal S1 is generated, and the battery 2 monitors the wireless device 5.
Power supply to the B main circuit 53B is continued. Similarly,
The monitoring control unit 54A of the operating system is the monitoring control unit 54B of the standby system.
Even if the standby system receives the normal monitoring signal S2Bb, the relay control unit 52A does not receive the voltage drop signal S1 when the commercial AC power supply is out of power for a short time. Therefore, the power is supplied to the main circuit 53A. There is no momentary interruption. Therefore, even if the main circuit 53A includes an IPL activated CPU, the operational reliability of this communication device is ensured when the commercial AC power supply is out of service for a short time.

Main circuit 5 of the operation system at the time of power failure of the commercial AC power supply
When a failure occurs in 3A, the failure monitoring unit 54A causes the main circuit 5
The monitoring signal S2Aa indicating the failure of 3A is sent to the failure monitoring unit 54B of the standby system. Upon receiving the monitoring signal S2Aa, the failure monitoring unit 54B controls the relay control unit 52B to connect the power supply path to the main circuit 53B, and the wireless device 5B changes from the cold standby state to the active system. Therefore, the communication device of the present embodiment can reduce the current consumption from the battery 2 and extend the time until the system goes down while maintaining the operation reliability even during the momentary power failure of the commercial AC power supply. it can.

In the communication device according to the embodiment shown in FIG. 1, the output voltage of the rectifier circuit 1 is stepped down by the power supply unit 4 provided outside the wireless devices 5A and 5B. Are individually arranged in the wireless devices 5A and 5B, and the DC power from the rectifier 1 and the battery 2 is supplied to the wireless devices 5A and 5B or the main circuits 53A and 5B.
3B can be directly supplied to each of them, and in this case, it is apparent that the same battery power consumption reduction control as in the communication device of FIG. 1 can be performed.

[0020]

As described above, the present invention is provided with the power supply control means for stopping the power supply to the backup system circuit of the communication circuit having the redundant configuration when the voltage of the backup battery drops below the predetermined voltage. It can reduce the current consumption during a long power outage and extend the time until the system goes down while maintaining the operational reliability of the communication device with redundant configuration even during the momentary power failure of the commercial AC power supply. effective.

[Brief description of drawings]

FIG. 1 is a block diagram showing a communication device according to an embodiment of the present invention.

[Explanation of symbols]

 1 Rectifier 2 Battery (BAT) 3 Battery voltage monitor (V-MON) 4 Power supply 5A, 5B Radio equipment 51A, 51B Relay 52A, 52B Relay controller (RLC) 53A, 53B Main circuit 54A, 54B Fault monitor (ALM)

Claims (3)

[Claims] 1. A rectifier circuit for converting commercial AC power into DC power, and a battery charged by the rectifier circuit.
In a communication device having a redundant configuration including the rectifier circuit and a communication circuit having a redundant configuration in which DC power is supplied from the battery to a circuit power supply, when a voltage of the battery drops below a predetermined voltage, a backup system circuit of the communication circuit is provided. A communication device having a redundant configuration, comprising a power supply control means for stopping power supply. 2. The communication device having a redundant configuration according to claim 1, wherein the standby system circuit is in a hot standby operation when the commercial AC power is being supplied to the rectifier circuit. 3. The power supply control means generates a voltage drop signal when detecting a voltage drop of the battery, and stops the power supply from the circuit power supply to the standby circuit when receiving the voltage drop signal. 3. The redundantly configured communication device according to claim 2, further comprising a power supply stop circuit for controlling the power supply.