JP2894984B2 - Communication device with redundant configuration - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art One of conventional communication devices of this type is a radio device provided in a base station of a mobile telephone system. This type of wireless device uses a rectifier for converting commercial AC power into DC power and DC power from a battery charged by the rectifier as an input of a circuit power supply. In the event of a commercial AC power failure, the wireless device is configured not to stop functioning because DC power is supplied to the circuit power from a backup battery. Further, the radio apparatus has a hot standby configuration of N: 1 redundancy (N is an integer including 1), and the function of the standby radio apparatus is replaced by a function of the standby radio apparatus when a failure of the active radio apparatus occurs, thereby improving the reliability of the system. Had improved. 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 mobile phone service. In other words, there is a disadvantage that the time required for the system to be down is shortened.

A means for solving the above-mentioned disadvantage is disclosed in Japanese Patent Laid-Open No.
No. 79757 discloses the exchange.
In this exchange, when the commercial AC power supply is cut off, power supply to the standby system is stopped, and DC power is supplied only from the battery to the operating system.

[0004]

However, in the disclosed switchboard, the power supply to the standby system is stopped by judging that the commercial AC power supply has been cut off.
Even in the case of an instantaneous power failure of about 0 millisecond, or even 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 started by Program Loading
In general, in a wireless device for a car phone having a U-shaped configuration and a redundant configuration, when the disclosed technology is applied, it takes a long time to restart after recovery of the commercial AC power supply. There was a problem that the operational reliability of the telephone system was reduced.

Accordingly, an object of the present invention is to provide a rectifier for rectifying commercial AC power into DC power and a mobile phone radio device or the like which is supplied with circuit power from a battery charged with the DC power and has a redundant configuration. In a communication device,
Eliminates the drawbacks of the conventional technology described above, reduces the current consumption from the battery, and extends the time until the system goes down, while maintaining the operational reliability even during an instantaneous power failure of the commercial AC power supply. An object of the present invention is to provide a current consumption reduction method capable of increasing the performance.

[0006]

According to the present invention, there is provided a communication apparatus having a redundant configuration, comprising: a rectifier circuit for converting commercial AC power into DC power; a battery charged by the rectifier circuit; In a redundantly configured communication device including a redundantly configured communication circuit that supplies power to a circuit power supply, a power supply control unit that stops power supply to a standby system circuit of the communication circuit when a voltage of the battery falls below a predetermined voltage. Is provided.

[0007] The communication device having the redundant configuration 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.

[0008] In the communication device having the redundant configuration, the power supply control means may generate a voltage drop signal when the voltage drop of the battery is detected, and the standby power supply circuit may receive the voltage drop signal from the circuit power supply. And a power supply stop circuit for stopping power supply to the power supply.

In the communication device having a redundant configuration according to the present invention, the supply of power to the standby system is stopped by detecting a voltage drop of the battery. The redundant configuration can be maintained without any problem. On the other hand, in the case of a long-time power failure, this communication device stops the power supply to the standby system by knowing the battery voltage drop, so that the current consumption of the battery can be reduced and the communication device may stop functioning. You can extend the time until.

[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 radio device installed in a base station of a car telephone system.

This communication device has a 1: 1 redundancy configuration, and it is assumed that the wireless device 5A is an active system and the wireless device 5B is a standby system for hot standby (also called a standby system).
The rectifier 1 rectifies commercial AC power from a commercial AC power supply to generate DC power (voltage -48 V). DC power from the rectifier 1 charges the battery (BAT) 2 and is supplied to the power supply unit 4. The power supply unit 4 generates DC power (voltage +5 V) necessary for the operation of the main circuits 53A and 53B in the wireless devices 5A and 5B. During the hot standby operation, the output of the power supply unit 4 outputs 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. The circuits included 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 failure monitoring units (ALMs) 54A and 54B have the same functions. Each of main circuits 53A and 53B performs a main function of wireless devices 5A and 5B, respectively. The operating system of the wireless devices 5A and 5B performs, for example, transmission and reception of radio signals to and from a mobile telephone terminal, communication channel allocation control to and from a mobile telephone terminal, and transmission and reception of a wired signal to and from an upper station. Do. However, the wireless devices 5A and 5B are respectively assigned to the active system and the standby system according to the initial settings and the presence or absence of a failure.

Now, since the radio apparatus 5A is operating, 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 to determine the relay state of the relay control unit (RLC) 52A. And the failure monitoring unit (ALM) 54B of the wireless device 5B having the redundant configuration is notified. That is, when the main circuit 53A of the wireless device 5A is faulty, the fault monitoring unit 54A detects the fault and outputs a monitoring signal S2Aa indicating the fault to the relay control unit 52A and the fault monitoring unit of the standby wireless device 5B ( ALM) 54B and stops the operation of the main circuit 53A. When receiving the monitoring signal S2Aa, the failure monitoring unit 54B of the wireless device 5B that has been the standby system activates the main circuit 53B to make the wireless device 5B an active system.

Here, if the commercial AC power supply fails while the radio devices 5A and 5B are not out of order, the rectifier 1 stops outputting DC power, but the battery 2 which has been charged by the rectifier power supply 1 until then stops. DC power is supplied to the power supply unit 4 instead of the rectifier device 1, and the wireless devices 5A and 5B operate while maintaining the redundant configuration. Thereafter, if the power failure of the commercial AC power source lasts for a long time, the voltage of the battery 2 starts to decrease due to the discharge of the battery 2. When battery 2 drops below a predetermined voltage, battery voltage monitoring section (V-MON) 3 detects this voltage drop and outputs voltage drop signal S1 to relay control sections 52A and 52A of 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 turns off the power supply 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 faulty are simultaneously received. It stops, and turns on the relay 51A in a state other than the above. Relay control unit 5
1B, like the relay control unit 51A, the voltage drop signal S
1 and the 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.

The relay control unit 52B of the standby wireless device 5B is connected to the fault monitoring unit 54A of the active wireless device 5A.
When the voltage drop signal S1 is received in addition to the monitoring signal S2Ab not indicating a failure from the controller 51, the relay 51B is turned off to stop the power supply to the main circuit 53B. That is, in addition to the monitoring signal S2Ab indicating that the working system is normal, the failure monitoring unit 54B of the standby system also includes the
Then, the power supply to the main circuit 53B is stopped, and the wireless device 5B shifts to the cold standby state. If the power failure of the commercial AC power supply is short, the battery voltage monitoring unit 3 does not detect the voltage drop of the battery 2 enough to generate the voltage drop signal S1, and
The power supply to the B main circuit 53B is continued. Similarly,
The monitoring control unit 54A of the active system is replaced by the monitoring control unit 54B of the standby system.
Even if the standby system receives a monitoring signal S2Bb indicating that the standby system is normal, the power supply to the main circuit 53A is not performed because the relay control unit 52A does not receive the voltage drop signal S1 if the power failure of the commercial AC power is short. There is no interruption. Therefore, even when the main circuit 53A includes an IPL-activated CPU, the operational reliability of the communication device is ensured when the commercial AC power supply is short-circuited for a short time.

When the commercial AC power supply fails, the main circuit 5 of the operation system
When a failure occurs in the main circuit 5A, the failure monitoring unit 54A
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 according to 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 radio devices 5A and 5B, respectively, and the DC power from the rectifier 1 and the battery 2 is supplied to the radio devices 5A and 5B or the main circuits 53A and 5B.
3B can be supplied directly to each of them, and in this case, it is apparent that the same battery power reduction control as that of 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 standby system circuit of the redundant communication circuit when the voltage of the backup battery falls below a predetermined voltage. It is possible to reduce the current consumption during prolonged power outages and extend the time until the system goes down, while maintaining the operational reliability of the redundant communication device even during a momentary power outage of the commercial AC power supply. effective.

[Brief description of the drawings]

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

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rectifier 2 battery (BAT) 3 battery voltage monitor (V-MON) 4 power supply 5A, 5B wireless device 51A, 51B relay 52A, 52B relay controller (RLC) 53A, 53B main circuit 54A, 54B fault monitor (ALM)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04B 1/74 H04B 1/16 H04B 1/04 H02J 9/06 503

Claims (3)

(57) [Claims] A rectifier circuit for converting commercial AC power into DC power, a battery charged by the rectifier circuit,
In a communication device having a redundant configuration including a communication circuit having a redundant configuration in which DC power is supplied to a circuit power supply from the rectifier circuit and the battery, when a voltage of the battery falls below a predetermined voltage, A communication device having a redundant configuration, comprising power supply control means for stopping power supply. 2. The redundantly configured communication device according to claim 1, wherein when the commercial AC power is supplied to the rectifier circuit, the standby circuit performs a hot standby operation. 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 system circuit upon receiving the voltage drop signal. 3. The communication device with a redundant configuration according to claim 2, further comprising a power supply stop circuit for causing the power supply to stop.