JPH09305271A - Power supply system of multimedia multiplexing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform easy and effective backup operation when importance is classified by providing a power source distribution part which detects an alarm generated by an uninterrupted power source in case of main power source abnormality and supplies secondary electric power from the uninterruptive power source to only a subrack of high importance. SOLUTION: The uninterruptive power source 2 detects an alarm when primary power source (a) supplied from a main power source 1 is abnormal and outputs a primary-side power abnormality alarm (c) to a CONF switching part 7 in the power source distribution part 5 of the multimedia multiplexing device 3. The CONF switching part 7 gives importance by subracks 6 and sets CONF in advance. The CONF switching part 7 having received the primary-side power source abnormality alarm (c) from the uninterruptive power source 2 gives importance by the subracks 6 and switches the CONF so that only a subrack of high importance in the CONF is put in operation while cutting electric power to others.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply system for a multimedia multiplexer having a plurality of sub racks each having a data line.

[0002]

2. Description of the Related Art A conventional multimedia multiplexer is provided with an uninterruptible power supply using a secondary battery for backup in consideration of the occurrence of an abnormality in the main power supply, and is output from the uninterruptible power supply when an abnormality occurs in the main power supply. The secondary power supply voltage is supplied to each subrack.

However, in the above power supply system, the output voltage of the uninterruptible power supply by the secondary battery is supplied to all the sub racks, so that it is difficult to secure the power supply time.

Conventionally, as means for solving this problem, Japanese Unexamined Patent Publication No. 4-5741 (hereinafter referred to as prior art 1)
In a backup device equipped with a storage device, a main power supply, and an auxiliary power supply, a timer that is divided into multiple groups according to the importance of data and that is activated by a circuit that detects a power failure of the main power supply, and an instruction for this timer Discloses a backup method for a storage device and a device including a switch circuit that cuts off the supply of auxiliary power for each group.

According to the prior art 1, a power failure of the main power source is detected, a timer is started, and the supply of the auxiliary power source is cut off from data of low importance at regular intervals, thereby shortening the system restart. It can be done in time.

However, practically, it is often sufficient to divide the data into two with high importance data and low importance data, and the configuration of gradually cutting off like the prior art 1 becomes complicated and expensive. In addition, since the method of cutting along the timer is used, it takes time to process.

On the other hand, as means for solving the above problem, Japanese Patent Laid-Open No. 227151/1988 (hereinafter referred to as Prior Art 2) discloses switching means connected between a subscriber terminal and a subscriber line. , A subscriber circuit control device comprising a power supply voltage detection means for detecting the voltage of the backup power supply and means for disconnecting a part of the subscriber terminal from the subscriber line in accordance with the detection output of the power supply voltage detection means at the time of power failure Is disclosed.

According to the prior art 2, it is possible to reduce the capacity of the backup storage battery by disconnecting unnecessary subscriber terminals from the subscriber line in accordance with the detection output of the power supply voltage detecting means during a power failure. Become.

However, since there are many steps (procedures) until the unused line is discriminated and the line is disconnected, the processing also takes time.

[0010]

As described above, in the power supply system of the conventional multimedia multiplexer, the output voltage of the uninterruptible power supply by the secondary battery is supplied to all subracks, so that the power supply time is long. There was a problem that it was difficult to secure.

An object of the present invention is to solve the above problems and to provide a power supply system for a multimedia multiplexer which realizes a simple and effective backup when the importance is divided.

[0012]

In order to solve the above problems, the present invention provides a power supply system for a multimedia multiplexer having a plurality of subracks each having a data line. Main power supply that supplies power, an uninterruptible power supply that detects an abnormality of this main power supply and generates an alarm, and a secondary power supply for backup, and normally the power output from the main power supply The importance of the data line that is distributed and supplied to each subrack unit is set in advance, and an alarm at the time of the main power supply abnormality that occurs in the uninterruptible power supply is detected, and only the subrack of high importance is A power distribution unit that supplies a secondary power from a power failure power source is provided.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an overall structure of a power supply system of a multimedia multiplexing apparatus according to the present invention.
The primary power supply a supplied from the UPS is an uninterruptible power supply (UPS) 2
Is supplied to. The uninterruptible power supply 2 generates a secondary power supply b and supplies it to the AC power supply input section 4 of the multimedia multiplexer 3. The AC power input unit 4 outputs the secondary power supply b supplied from the UPS 2 to the power distribution unit (POW-DIS) 5. The power distribution unit 5 supplies power in parallel to each subrack unit of the subrack 6.

On the other hand, the uninterruptible power supply 2 detects an alarm when the primary power supply a supplied from the main power supply 1 is abnormal, and the primary power is supplied to the CONF switching unit 7 inside the power distribution unit 5 of the multimedia multiplexer 3. The side power supply abnormality alarm c is output.

In the CONF switching unit 7, a CONF having a degree of importance is set in advance for each subrack unit of the subrack 6. In the CONF switching unit 7 that has received the primary-side power supply abnormality alarm c from the uninterruptible power supply 2, only the subrack of high importance among the CONFs in which each subrack unit of the subrack 6 has importance is operated. Then, the CONF is switched to ON, the power supply to the other parts is cut off, and the power supply time of the uninterruptible power supply 2 is extended.

FIG. 2 shows a concrete structure of the CONF switching unit 7. The uninterruptible power supply 2 detects an alarm when the primary power supply a supplied from the main power supply 1 is abnormal, and the inside of the power distribution unit 5 is detected. The primary side power supply abnormality alarm c is output to the CONF switching unit 7.

In the CONF switching unit 7, the alarm detection circuit 71 detects the primary side power supply abnormality alarm c and transfers the alarm to the switching control circuit 72. The switching control circuit 72 is
By the alarm transferred from the alarm detection circuit 71,
A preset CONF is read out from the memory circuit 73, and a switching instruction is issued so that only the preset CONF having a high degree of importance is operated.

Therefore, according to the power supply system having the above configuration, for example, in the case of having a maximum of 16 subracks, only one of them is operated even in an abnormal condition.
By creating the ONF, the power supply time of the uninterruptible power supply 2 can be increased 16 times. This is very effective when a secondary battery such as a storage battery is used as the uninterruptible power supply 2.

[0020]

As described above, according to the present invention, it is possible to provide a power supply system for a multimedia multiplexer which realizes a simple and effective backup when the importance is divided.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration as an embodiment of a power supply system of a multimedia multiplexing apparatus according to the present invention.

FIG. 2 is a block diagram showing a specific configuration of a CONF switching unit of the same embodiment.

[Explanation of symbols]

 1 Main Power Supply 2 Uninterruptible Power Supply (UPS) 3 Multimedia Multiplexing Device 4 AC Power Supply Input Unit 5 Power Supply Distribution Unit (POW-DIS) 6 Subrack 7 CONF Switching Unit 71 Alarm Detection Circuit 72 Switching Control Circuit 73 Storage Circuit

Claims (3)

[Claims] 1. A power supply system for a multimedia multiplexer having a plurality of subracks each having a data line, wherein a main power supply for supplying power to each of the plurality of subracks and an abnormality of the main power supply are detected. The power supply from the main power supply is normally distributed to each subrack and the data line that stores the subrack unit is important. And a power distribution unit that supplies a secondary power from the uninterruptible power supply only to the subrack of high importance by detecting an alarm when the main power supply is abnormal generated by the uninterruptible power supply. A power supply system for a multimedia multiplexer, which is characterized by: 2. The power distribution unit, an alarm detection circuit that detects an alarm from the uninterruptible power supply, a storage circuit that stores subrack selection information set according to the importance, the alarm detection circuit 2. The multimedia multiplexer according to claim 1, further comprising a switching control circuit that reads subrack selection information from the storage circuit and supplies the secondary power source to the corresponding subrack when an alarm is detected in step 1. Device. 3. The multimedia multiplexing apparatus according to claim 1, wherein the uninterruptible power supply is a secondary battery.