KR20000033186A - Power cut off control apparatus for mobile terminal - Google Patents

Abstract

PURPOSE: A power cut off control apparatus for mobile terminal is provided to easily maintain the operation status by the power of a mobile terminal by the mobile switching center by informing the mobile switching center of an operation interruption, in the event of the power failure of the mobile terminal. CONSTITUTION: A charger(1) proceeds the charging and discharging of a battery and the switching of DC power supply to RIU. A backup battery(2) supplies backup power in the event of normal power failure. A voltage level detection part(3) outputs the high level in normal power, and the low level in power failure or low battery. A switch(4) makes on/off for the output of the voltage level detection part(3). A power switching controller(5) supplies interrupt generation control signal and diode power. An interrupt and register controller(6) controls a register generating a control signal to maintain power-on status. A power holder(7) maintains power uniformly. A DC/DC converter(8) supplies DC power necessary for RIU.

Description

Power cut control device of terminal

The present invention relates to a wireless subscriber network system, and in particular, the power supply of the terminal to notify the switching system to stop the operation by the power cut when the terminal power is cut off so that the switching system can easily manage the operating state by the power of the terminal A blocking control device.

In general, the WLL system includes a WLL switch, a base station controller (RPC), a base station (RP), a radio interface unit (RIU), and a base station operating unit (RPOM: Radio Port Operation & Maintenance center). And a data communication matching device (IWF) and a home location register for data services.

Among them, the subscriber station is located in the middle of the base station and the subscriber to provide a wireless connection between the base station and the terminal, depending on the antenna location, line and use, such as indoor / external, single / multiple depending on the number of lines, POTS, ISDN, It can be divided into data terminals.

In the WLL system, the current registration function by power off of the terminal was not implemented. Therefore, the WLL system did not meet the WLL standard. Also, the WLL system lacked the terminal status registration function in the upper system.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional drawback, and an object of the present invention is to notify a switching system of an operation stop due to a power cut when the terminal is turned off so that the RPC manages an operation state caused by the terminal's power. An object of the present invention is to provide a power cut control device of a terminal.

1 is a block diagram of a power cut control device of a terminal of the present invention;

2 is a detailed circuit diagram of a power cut control device of a terminal of the present invention;

<Explanation of symbols for main parts of drawing>

1: charger 2: backup battery

3: voltage level detection unit 4: switch

5: Power switching controller 6: Interrupt and register controller

7: Power hold 8: DC / DC converter

9: ringer

In order to achieve the above object, the present invention generates an interrupt by the interrupt and register control unit when the terminal power is turned off so that the software can perform the registration function by turning off the power and inactivate the power hold signal after completion of the power module. Configure to disable their output.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of the present invention, the charger (1) for receiving the power from the adapter for converting 220V / 110V AC to DC to perform battery charging, discharging and switching of the DC supply power of the RIU, the charger when the power is cut off A backup battery 2 for supplying backup power to (1) and a voltage for sensing a level of power input from the charger 1 and outputting a low level at a normal power supply, a low level at a power cut or a low battery. A level sensing unit 3, a switch 4 connected to an output terminal of the voltage level sensing unit 3 to switch its output on / off, and a voltage level at the on / off and switching-on of the switch 4 An interrupt generation control signal for detecting an active state of the detection signal and a power switching control unit 5 for supplying diode power and an interrupt generation control signal from the power control unit 5 generate and clear the interrupt. An interrupt and register controller 6 for controlling a register for generating a control signal that maintains the power-on state until the end of the high power-down registration procedure; an output terminal and an interrupt and register controller of the power switching controller 5 ( It is configured to include a power hold 7 connected to the power hold of 6) to keep the power constant, and a DC / DC converter 8 and a ringer 9 for supplying the DC power required by the RIU.

FIG. 2 is a detailed circuit diagram of the present invention, in which the voltage level detecting unit 3 maintains 4.5V and a distribution resistor R1-R4 for distributing an input voltage, and a zener diode ZD and a capacitor C1. It is composed of an op amp OP1, and a switch 4 is connected to an output terminal thereof.

In addition, the power switching control unit 5 is connected to the switch 4, the resistor (R5) is connected to the base, the resistor (R6) is connected to the collector and the power supply (Vcc) is supplied to the emitter ( Q1) is configured to include.

The interrupt and register control section 6 is composed of first and second deflip-flops FF1 and FF2 to generate a control signal to the powerhold 7 and generate an interrupt.

In addition, the power hold 7 is composed of two diodes D1 and D2 so that the output signals of the DC / DC converter 8 and the ringer 9 (5V: high output enable, 0V: low output disable) Create

The DC / DC converter and the ringer 9 are modules capable of output control.

Referring to the operation of the present invention configured as described above is as follows.

When the user turns on / off the power switch of the terminal or the power of the adapter is cut off, the power is supplied from the backup battery 2 to the charger 1 and the voltage level indicates whether the discharge voltage of the backup battery 2 is equal to or less than the reference voltage. The sensing unit 3 detects.

That is, the voltage input to the voltage level detecting unit 3 is divided by the resistors R1-R4 and input to the non-inverting terminal (+) of the op amp OP1 and the zener diode (-) input to the inverting terminal (-). Compared with the reference voltages of the ZD) and the capacitor C1, a high level signal is output when the reference voltage is higher than the reference voltage, and a low level signal is output when the reference voltage is lower than the reference voltage.

If the power switch 4 is turned on, the voltage (high level) of the voltage level detecting unit 3 is output through the switch 4 and the power switching controller 5 and the diode D2 of the power holding 7. In order to generate the output enable signals of the power modules, the normal power is supplied from the DC / DC converter 8 to the RIU so that the RIU is booted. At this time, the signal of the power hold 7 is maintained in an active state.

In this case, the DC / DC converter 7 and the ringer 8 are directly connected to the DC output terminal of the charger 1 to be controlled by receiving an enable signal from the power switching controller 5, and the power switching controller 5 is controlled. Detects the switch 4 signal and receives the result and the power hold 6 input signal to generate a DC / DC output enable signal.

If the power switch 4 is turned off, the ground level of the switch 4 is applied to the power hold 7 while the power supply is maintained by the power hold signal, and the power hold 7 is in an inactive state. Since the ground level of the switch 4 is powdered and input to the base of the transistor Q1 through the resistor R5 of the switching controller 5, the transistor Q1 is turned on, and thus the interrupt and register controller 6 is turned on. The interrupt control signal is generated from the second flip-flop FF2.

Therefore, when the power hold 7 signal is inactive, the output of the power modules is disabled.

That is, when the operation of the subscriber access device (terminal or RIU) is stopped because the DC power supply is cut off or the discharge voltage of the backup battery 2 is lower than the standard, the switching system recognizes this so that the operation state by the power supply of the terminal can be managed. It is possible to implement the registration function by the power off.

As described above, the present invention provides a voltage level sensing unit 3, a switch 4, a power switching controller 5, an interrupt and register controller 6, and a power hold 7 at an output terminal of the charger 1. It notifies the switching system of the operation stop due to the power off when the terminal power is cut off so that the RPC can manage the operation state by the power of the terminal, thereby implementing the power cut registration function of the terminal and controlling the terminal status from the outside. Has the advantage of being easy.

Claims (3)

A charger that receives power from an adapter converting 220V / 110V AC into DC to perform battery charging and discharging and switching of the DC power supply of the RIU; A backup battery supplying backup power to the charger when the power is cut off; A voltage level sensing unit for sensing a level of power input from the charger and outputting a low level at a high power level, a power interruption state, or a low battery level at a normal power supply; A switch connected to an output terminal of the voltage level sensing unit to switch its output on / off; A power switching control unit for supplying a diode power and an interrupt generation control signal for detecting an active state of the voltage level detection signal when the switch is on / off and on; An interrupt and register control unit which receives an interrupt generation control signal from the power control unit and controls a register for generating a control signal for generating and clearing an interrupt and keeping the power on state until the power down registration procedure is completed; A power hold connected to an output terminal of the power switching control unit and a power hold of the interrupt and register control unit to maintain a constant power; And a DC / DC converter and a ringer connected to an output terminal of the power hold to supply a DC power required by the RIU. The method of claim 1, wherein the voltage level detection unit, A plurality of resistors for distributing the input voltage from the charger, Zener diode to maintain a constant voltage, And an op amp configured to compare a voltage distributed by the plurality of resistors with a voltage of the zener diode and output a corresponding control signal. The method of claim 1, wherein the interrupt and register control unit, A first deflop that sends a control signal to the powder hold; And a second deflip-flop connected to an output of the power switching control unit to generate an interrupt.