JP2010118934A - Power failure measure power supply system for optical subscriber line termination device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a best backup time by stopping functions step by step in accordance with the consumption level of a backup battery. <P>SOLUTION: An AC-DC conversion apparatus for power failure measures comprises a power failure detecting means for detecting a power failure of a commercial power source and notifying an optical subscriber line termination device of power failure detection information. A battery unit for power failure measures comprises a battery consumption level calculating means for monitoring a DC voltage of a battery to calculate the consumption level of the battery and notifying the optical subscriber line termination device of the calculated consumption level as battery consumption level information. The optical subscriber line termination device comprises a power feeding control means for controlling its own power supply section on the basis of the received power failure detection information and battery consumption level information, and stops power feeding step by step from a low-priority interface in a plurality of information service interfaces. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a subscriber line terminating device installed in a home of an optical transmission system, and more particularly to a power failure countermeasure power supply system for an optical subscriber line terminating device having a backup power source.

In recent years, FTTH (Fiber to the), which provides subscribers with high-speed and wide-band communication services by connecting optical fiber between subscribers and communication facilities such as telephone stations and transmitting and receiving various information using optical signals. home) has become widespread. As an optical fiber connection method in an FTTH optical transmission system, an optical subscriber line terminator, which is an ONU (Optical Network Unit) that branches into a 1: n branch from a station device and is placed on the side of a plurality of subscribers. PON (Passive Optical Network) technology to connect to the network has come to be used. The basic configuration of this PON system will be described with reference to FIG. The PON system communicates by optical signals between a subscriber line terminal device 10 installed in a station 9 and an optical subscriber line terminator 3 provided in each of a plurality of subscriber houses 2 ₁ to 2 _n. Do. Therefore, a passive star coupler 7 is installed between the subscriber line terminal station device 10 and the plurality of optical subscriber line termination devices 3, and one single mode is provided from the subscriber line terminal station device 10 to the passive star coupler 7. The optical fiber 8 is connected, and the passive star coupler 7 to the optical subscriber line terminating device 3 are connected by individual single mode optical fibers 6 _{1 to} 6 _n for each subscriber. As a result, the terminals 4 and 5 of the subscriber houses 2 ₁ to 2 _n can receive various information services such as the Internet, video information, and IP telephones via the optical subscriber line terminating device 3.

  The optical subscriber line terminating device 3 is connected to the subscriber line terminal device 10 which is a station device through only an optical fiber, and the power necessary for operation can be supplied like a general wired telephone. Therefore, it is configured to be supplied using a general commercial power source (for example, AC 100V power source) at the subscriber's house. Therefore, during commercial power outages, batteries, chargers, etc. will be used in a certain amount of time so that the minimum necessary communication (voice calls) can be made for emergency communications during disasters and complaints in the event of a power outage. It is necessary to provide a backup power source (see, for example, Patent Document 1).

  In the case of the optical subscriber line terminating device described in Patent Document 1, a configuration for further increasing the backup time during a power failure is provided. Specifically, the power supply block inside the optical subscriber line termination device is divided between the transmission side device and the reception side device, and at the time of standby not actually communicating with the communication equipment (such as the station device side) Means for stopping the power supply to the transmission side device is provided to reduce the power consumption of the optical subscriber line termination device between them, and instead, the backup battery is charged with the corresponding power.

JP-A-8-191273

  Conventionally, there is an uninterruptible power supply (UPS) as a backup power supply used for computers and the like, but these are large-scale and high-priced devices. Not suitable for line termination equipment. On the other hand, in the case of a power backup system for an optical subscriber line termination device, backup using a battery that can be easily prepared by a user is mainly used, and is suitable for use in a general home. Such a battery has a backup time of several tens of minutes in terms of performance, and it is necessary to increase the backup time as described in Patent Document 1. However, since the power consumption of the battery advances and all the power supply is suddenly cut off at the moment when the voltage reaches a certain voltage, there is a problem that the power supply is cut off earlier than expected depending on how the battery is consumed.

  The present invention has been made to solve the above-mentioned problems, and terminates the function in stages according to the level of consumption of the backup battery, thereby enabling the optical subscriber line termination that enables the best backup time. The purpose is to obtain a power failure countermeasure power supply system for the device.

  The power failure countermeasure power supply system for an optical subscriber line terminating device according to the present invention outputs an optical subscriber line terminating device having a plurality of information service interfaces installed in a PON system and a direct current from a replaceable battery. Supply the direct current from the AC / DC converted commercial power supply to the power failure countermeasure battery device and the optical subscriber line termination device, and supply the direct current from the battery of the power failure countermeasure battery device when the commercial power supply fails The power failure countermeasure AC / DC converter includes a power failure detection means for detecting a power failure of the commercial power source and notifying the optical subscriber line termination device of the power failure detection information. The battery device for power failure measures has a battery consumption level calculation means for monitoring the DC voltage of the battery, calculating the battery consumption level, and notifying the optical subscriber line termination device as battery consumption level information. The optical subscriber line termination device controls its own power supply unit based on the received power failure detection information and battery consumption level information, and stops power supply step by step from the lowest priority interface among the multiple information service interfaces. The power supply control means is provided.

  According to the present invention, in power backup of the optical subscriber line termination device, AC power failure detection information and battery consumption level information are acquired, and the optical subscriber line termination device has a plurality of information according to the battery consumption level. Since the DC supply is stopped in order from the lowest priority in the service interface, backup power is not consumed by all information service interfaces at the time of a power failure. There is no such thing as being unable to receive all services at once. For example, if the IP phone I / F priority is set first, the IP phone service can be used longer than other services as the minimum necessary communication such as emergency contact even in the event of a power failure. It becomes. In addition, if many of the information service interfaces are set to the lowest priority as much as possible, the battery consumption rate decreases to reduce power consumption after a power outage at an early stage, and the remaining higher priority is set accordingly. It is possible to extend the backup time of the service.

Embodiment 1 FIG.
1 is a block diagram showing a schematic configuration of a power failure countermeasure power supply system for an optical subscriber line terminating apparatus according to Embodiment 1 of the present invention.
The power failure countermeasure power supply system for the optical subscriber line terminator according to the present invention includes the AC adapter 40 for power failure countermeasures, the battery device 30 for power failure countermeasures, and the optical subscriber line terminator 3.
As is well known, the optical subscriber line terminating device 3 performs two-way transmission of an optical signal with a single optical fiber to the subscriber line terminal station device 10 by the PON technology. An optical module 21 that performs electrical signal conversion and reverse optical signal conversion of an upstream electrical signal is provided. In addition to synchronizing the downlink burst signal and terminating the control signal of the transmission path, the main body function unit 22 for assembling the uplink signal from the termination device into a frame is provided. The optical subscriber line terminating device 3 is controlled by the main body function unit 22 and has various interfaces such as an IP telephone I / F 25, a wireless LAN 26, an infrared I / F 27, a router / PHY (physical layer) unit 24, and the like. In the invention, an optical telephone compatible router-integrated ONU having an information service interface) is provided so that an information service can be provided to a user. The power supply unit 23 stabilizes the direct current supplied from the power failure countermeasure AC adapter 40 and supplies the stabilized direct current to each unit in the optical subscriber line terminating device 3.
The above is the general configuration of the optical subscriber line terminating device 3, but in the power failure countermeasure power supply system of the present invention, as will be described later, the main body function unit 22 includes a power failure countermeasure AC adapter 40 and a power failure countermeasure battery. Power supply from the power supply unit 23 to the information service interface is controlled according to information given from the device 30, and display control of the LED display unit 28 is performed.

  The operating power supply for the optical subscriber line terminating device 3 uses a direct current obtained by converting the voltage of a general commercial power supply (AC100V) with an AC adapter. A power failure countermeasure AC adapter 40 and a power failure countermeasure battery device 30 are provided as options for power failure countermeasures to be made possible. The power failure countermeasure AC adapter 40 automatically switches to DC voltage supply from the battery stored in the case of the power failure countermeasure battery device 30 at the time of a power failure as a general power failure countermeasure operation, and can continue service for several tens of minutes. It is said. Reference numerals 51 and 53 are DC / communication cables, and 52 is an AC cable for commercial power.

FIG. 2 is a block diagram showing the functional configuration of the power failure countermeasure battery device 30 and the power failure countermeasure AC adapter 40 according to the present invention.
In FIG. 2, first, the power failure countermeasure AC adapter 40 will be described. The power failure countermeasure AC adapter 40 includes an AC / DC conversion unit 41, a DC output selection unit 42, and a power failure detection unit 43.
The AC / DC conversion unit 41 converts alternating current of the commercial power source into direct current of a predetermined voltage used in the optical subscriber line terminator 3 and supplies the direct current to the DC output selection unit 42. The DC output selection unit 42 is also supplied with direct current from the backup power supply battery 31 housed in the power failure countermeasure battery device 30. The power failure detection unit 43 constantly monitors the supply of commercial power, and gives a detection output to the DC output selection unit 42 when a power failure is detected. The DC output selection unit 42 normally selects the direct current converted by the AC / DC conversion unit 41 and supplies it to the optical subscriber line terminating device 3, but when receiving the power failure detection output from the power failure detection unit 43, The direct current from the battery 31 is switched to supply to the optical subscriber line terminating device 3. That is, a conventional general power backup operation is performed. In the present invention, when a power failure is detected by the power failure detection unit 43, the power failure countermeasure AC adapter 40 is configured to notify the optical subscriber line termination device 3 of the power failure detection information on a line different from the direct current. Yes.

  The power failure countermeasure battery device 30 includes a backup power supply battery 31, a control unit 32 using a small microcomputer, a battery voltage monitoring unit 33, and an output cutoff control unit 34. The battery voltage monitoring unit 33 monitors the battery voltage divided into a whole or several blocks using a voltage monitoring IC or the like. In the control unit 32, the battery consumption level with respect to the battery voltage is defined in advance by dividing it into several levels. Based on this specification, the battery consumption level is calculated from the battery voltage monitored by the battery voltage monitoring unit 33, The battery power level information is notified to the subscriber line termination device 3 via a line separate from the direct current via the AC adapter 40 for power failure countermeasures. The control unit 32 monitors overdischarge voltage based on the battery voltage monitored by the battery voltage monitor unit 33 and controls the output cut-off control unit 34 to cut off the output current, thereby preventing battery leakage due to overdischarge. is doing. This overdischarge control is a function that has been performed conventionally.

  In the optical subscriber line terminating device 3, the power failure detection information from the power failure countermeasure AC adapter 40 and the battery consumption level information from the power failure countermeasure battery device 30 notified as described above are given to the main body function unit 22. . When receiving these two pieces of information, the main body function unit 22 can grasp the battery consumption level during a power failure. Therefore, priorities are set in advance for information service interfaces such as the IP telephone I / F 25, the wireless LAN 26, the infrared I / F 27, and the router / PHY unit 24 described above. The optical subscriber line terminating device 3 controls the power supply unit 23 so as to stop the DC supply step by step from the information service interface in the order of lower priority according to the battery consumption level at the time of power failure. As a result, in the event of a power failure, the backup power is not consumed by all information service interfaces throughout, so that it is not possible to receive all services at once when the battery is depleted.

  The main body function unit 22 also controls the LED display unit 28 based on the power failure detection information and the battery consumption level information, and displays the battery consumption state by a method such as blinking LED (including blinking interval) and changing the color. For example, the power outage backup state is displayed in red, and the state in which the battery is about to run out is displayed blinking. As a result, the user can grasp that the service is no longer available before the service is suddenly cut due to battery exhaustion.

  Further, the main body function unit 22 notifies the higher-level subscriber line terminal device 10 of the power failure detection information, the battery consumption level information, and the stop status of each information service interface using the PON protocol. Thus, the communication carrier can grasp the emergency situation of each user.

As described above, according to the first embodiment, in the AC / DC converter for power failure countermeasure (AC adapter 40 for power failure countermeasure), the power failure detection information is detected by detecting the power failure of the commercial power source. 3 is provided with a power failure detection means (power failure detection unit 43) for notifying the power supply 3 and monitoring the DC voltage of the battery in the power failure countermeasure battery device 30 to calculate the battery consumption level. A battery consumption level calculation means (battery voltage monitor unit 33, control unit 32) for notifying the termination device 3 is provided, and the optical subscriber line termination device 3 has its own power supply based on the received power failure detection information and battery consumption level information. A power supply control unit (main body function unit 22) for controlling the unit 31 and stopping power supply step by step from the low priority interface among the plurality of information service interfaces (24 to 28). In the event of a power outage, the backup power will not be consumed by all information service interfaces all the time, so there is no such thing as being unable to receive all services at once when the battery is depleted. . For example, if the priority order of IP phone I / F 25 is set first, the IP phone service can be used longer than other services as the minimum necessary communication such as emergency contact even in the event of a power failure. It becomes. In addition, if many of the information service interfaces are set to the lowest priority as much as possible, the battery consumption rate decreases to reduce power consumption after a power outage at an early stage, and the remaining higher priority is set accordingly. It is possible to extend the backup time of the service. In addition, the capacity of the battery is not constant under conditions such as mixing old and new, mixed with different types, natural discharge, temperature, etc. Under these various conditions, the user can receive services according to the degree of battery consumption. Become.
In the above example of the first embodiment, the power failure countermeasure power supply system of the present invention is described with the power failure countermeasure AC adapter 40, the power failure countermeasure battery device 30 and the optical subscriber line termination device 3 as separate housings. However, either one or both of the power failure countermeasure AC adapter 40 and the power failure countermeasure battery device 30 may be integrated into the housing of the optical subscriber line terminating device 3, or the power failure countermeasure AC adapter 40 may be integrated. The power failure countermeasure battery device 30 may be integrated in a different housing from the optical subscriber line termination device 3. In any case, the technical idea of the present invention does not change.

It is a block diagram which shows schematic structure of the power failure countermeasure power supply system of the optical subscriber line termination | terminus apparatus by Embodiment 1 of this invention. It is a block diagram which shows the function structure of the power failure countermeasure electrical ground apparatus and power failure countermeasure AC adapter which concern on Embodiment 1 of this invention. It is a block diagram which shows the basic composition of a PON system.

Explanation of symbols

  2 subscriber premises, 3 optical subscriber line termination equipment, 4 terminals (TV), 5 terminals (telephone), 6,8 optical fiber, 7 passive star coupler, 9 stations, 10 subscriber line terminal equipment, 21 light Module, 22 Main body functional unit, 23 Power supply unit, 24 Router / PHY unit, 25 IP phone I / F, 26 Wireless LAN, 27 Infrared I / F, 28 LED display unit, 30 Power failure countermeasure battery device, 31 Battery, 32 Control unit (microcomputer), 33 Battery voltage monitor unit, 34 Output cutoff control unit, 40 AC adapter for power failure countermeasure, 41 AC / DC conversion unit, 42 DC output selection unit, 43 Power failure detection unit, 51, 53 DC / communication cable , 52 AC cable.

Claims (3)

An optical subscriber line terminator having a plurality of information service interfaces installed in a PON system, a power failure countermeasure battery device that outputs direct current from a replaceable battery, and the optical subscriber line terminator In the normal state, the power supply is configured to supply a direct current obtained by AC / DC conversion of the commercial power supply, and to supply a direct current from the battery of the power failure countermeasure battery apparatus at the time of a power failure of the commercial power supply.
The power failure countermeasure AC / DC converter includes a power failure detection means for detecting a power failure of a commercial power source and notifying the power subscriber line termination device of power failure detection information,
The power failure countermeasure battery device comprises a battery consumption level calculation means for monitoring a DC voltage of the battery to calculate a battery consumption level and notifying the optical subscriber line termination device as battery consumption level information,
The optical subscriber line termination device controls its own power supply unit based on the received power outage detection information and the battery consumption level information, and performs step by step from the plurality of information service interfaces in order of decreasing priority. A power supply countermeasure system for an optical subscriber line terminator, comprising power supply control means for stopping power supply.   2. The power failure countermeasure power supply system for an optical subscriber line terminating device according to claim 1, wherein the power supply control means displays the battery consumption state by controlling the LED based on the power failure detection information and the battery consumption level information.   The power supply control means notifies the upper level subscriber line terminal equipment of power outage detection information, battery consumption level information, and the stop status of each information service interface using a PON protocol. 3. A power failure countermeasure power supply system for an optical subscriber line terminating device according to claim 2.

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