KR100936583B1 - A device and a operating method of power control in shadow area for portable phone - Google Patents

Abstract

The present invention relates to controlling the mobile terminal to be in a state in which a minimum current is consumed by immediately shutting off the operation power without repeatedly attempting a wireless connection with the base station for a predetermined time when the mobile terminal is located in a shadowed area. A processor for processing a communication signal in a code division multiple access method, and analyzing a base station reception signal strength applied from a high frequency unit and outputting a low level no service signal in a shaded area; A power supply unit for supplying operation power to each processor of the processor and the portable terminal by a corresponding control signal; A real time unit controlling an output of power supplied by the power unit by a no service signal applied from a processor; A high frequency unit selectively operating by a receiving unit or a transmitting / receiving unit by an operating power applied from a power supply unit to a control state, and applying a signal received by the receiving unit to the processor; A peripheral unit which is operated by an operating power applied from a power supply unit, stores a data applied from the processor, and outputs data to the display unit by a corresponding control signal; The first switch inputs the no-service signal of the processor and applies the operating power output from the power supply to the periphery of the processor, and immediately operates in the sleep mode to consume the minimum current and extend the battery life. It is effective.

Description

Power control device for shadow area of mobile terminal and its operation method {A DEVICE AND A OPERATING METHOD OF POWER CONTROL IN SHADOW AREA FOR PORTABLE PHONE}

1 is a functional diagram of a general mobile communication system,

2 is a functional block diagram of a mobile terminal operating power supply control device of the prior art;

3 is a flowchart of a method for controlling power of a portable terminal according to the prior art;

4 is a functional diagram of a mobile terminal shadow area operating power control device of the present invention,

5 is a flowchart illustrating a method for operating a mobile device shadow area operating power control device of the present invention.

    ** Explanation of symbols on the main parts of the drawing **

10: mobile terminal 20: base station

30: mobile switching center 40: public network

50,146: first diode 55,148: second diode

60,110: MS 70,120: Power supply

80,130: battery 90: clock portion

100,150: high frequency unit 140: real-time unit

142: real time clock 144: end gate

160: peripheral portion 162: input and output unit

164: Memory unit 170: First switch                 

180: second switch 190: oscillator

The present invention is to control the mobile terminal to consume the minimum operating power when the mobile terminal is located in a shaded area that can not receive the mobile communication service, in particular, without attempting to repeat a certain time wireless connection with the base station in the shaded area immediately The present invention relates to controlling to operate in a sleep mode or a sleep mode that consumes minimum current by cutting off unnecessary operating power.

The mobile communication system communicates with the other party anytime and anywhere while moving using a subscribed mobile terminal (UE: USER EQUIPMENT), and communication is performed through a wireless connection with a base station (BS).

The mobile terminal UE can communicate only in an area capable of receiving a radio signal of the base station BS at an effective level, and such an area is called a service area or a cell area. An area or area that does not receive a radio signal of a valid level from the base station as described above is called a shadow area.

The mobile terminal (UE) continuously performs data communication with the base station (BS) through a fixedly allocated channel to determine whether it is located in the service area or the shadow area, the mobile communication through the data communication as described above The MSC, which monitors and controls the entire system, checks the current location of the UE and connects the required CALL.

Hereinafter, a shadow area operation power control method of a portable terminal according to the prior art will be described with reference to the accompanying drawings.

It is attached to describe the prior art, Figure 1 is a general mobile communication system functional configuration diagram, Figure 2 is a functional configuration of the operating power control device of the conventional mobile terminal, Figure 3 is a conventional mobile terminal Power control method flow chart.

Referring to FIG. 1, a general mobile communication system includes a mobile terminal (UE) 10 that performs wireless communication through a call connection with a counterpart at any time and anywhere while moving, and wirelessly connects the mobile terminal 10 with a service area in a service area. A base station (BS) 20 that transmits and receives a communication signal, and a mobile station that is connected to the base station 20 and monitors and controls the entire mobile communication system and simultaneously sets up a call required by the subscriber by switching. To the public network 40 which sets up a PATH so that the MSC 30 and the mobile switching center 30 connect to a public telephone network (PSTN), a public data communications network (PSDN), the Internet (INTERNET), and the like. It is composed.

The mobile terminal 10 is located in a service area or a cell area, which is an area for effectively receiving a radio frequency (RF) signal transmitted from the base station 20, and is wirelessly connected to the base station 20, and has an electronic serial number (ESN). : Receives a signal transmitted from the base station 20 while performing data communication based on information that can distinguish the plurality of mobile terminals 10 by using an ELECTRONIC SERIAL NUMBER and an assigned unique telephone number (ID). Data communication such as signal strength (RSSI: RECEIVE SIGNAL STRENGTH INDICATOR) is performed.

The MSC 30 monitors and controls a plurality of base stations 20, and each base station 20 communicates the data with a plurality of mobile terminals 10 located in a corresponding service area. The mobile switching center 30 checks and monitors the positions of the plurality of mobile terminals 10, and sets a corresponding call path by switching to connect and communicate when there is a call connection request.

The mobile terminal 10 as described above should be located in the service area of the base station 20. In the SERVICE AREA, wirelessly connects with less power when the base station 20 is in close proximity, and wirelessly connects with the base station 20 using the maximum power when located in the outermost area of the service area. Wireless communication.

If the mobile terminal 10 is completely out of the service area of the base station 20 and located in the shadow area, the mobile communication service cannot be used (NO SERVICE), and in this case, the sleep mode is in a sleep state. MODE) ensures that only minimal functions operate to maximize battery life.

In the sleep mode of the mobile terminal as described above, only the reception path (RX PATH) of the radio frequency unit (RF) is operated to check whether or not a signal can be received from the base station 20. It is determined whether the service area has been entered.

2 is a device configuration for controlling an operating power source in a shaded area of the mobile terminal 10, and processes a signal for code division multiple access (CDMA) mobile communication (MSM: MOBILE STATION MODEM) 60 ), A power supply unit 70 for controlling the operation power supply to each functional unit of the MS 60 and the mobile terminal 10, and supplying power to the power supply unit 70, the charge and discharge battery (RECHARGEABLE BATTERY) And a clock unit 90 for supplying a clock of 32.768 MHz to the MS 60, and a high frequency unit 100 receiving high-frequency communication with operating power supplied from the power supply unit 70. On / off of the first diode 50 which transmits the operation control signal of the power supply unit 70 output from the MS 60 and the mobile terminal 10 applied from the external switch S / W. OFF) is composed of a second diode 55 for transmitting a control signal to the power supply (70).

2, the power supply unit 70 receives power from the battery 80, and the control signal PS_HOLD applied from the MS 60 is high through the first diode 50. The control signal PWR_ON_SW, which is applied in the HIGH state or is applied to the HIGH state through the second diode 55 from an external switch, is applied at the P_EN terminal, and the MS 60 and the high frequency unit When operating power is supplied to 100 and the control signal input to the P_EN terminal is applied in a low state, the power supply unit 70 controls the power output to the high frequency unit 100 to receive (RX) unit. Alternatively, the receiver enters a sleep mode for operating the RX PATH.

In the sleep mode as described above, the MS 60 operates by receiving a clock of 32.768 KHz generated from the clock unit 90 and receives a signal of a base station through the high frequency unit 100. Until it lasts.                         

Referring to FIG. 3, the control unit of the portable terminal operating power control device operating method according to the configuration of the prior art as described above, the corresponding control unit of the mobile terminal 10, the corresponding signal of the base station 20 is a high frequency In the first step S10 of determining whether it is received through the reception path RX PATH of the unit 100 and the base station signal is determined in the step S10 and a call connection is not requested. A second step (S20) of data communication with the base station 20 and information such as its own electronic serial number, unique telephone number and received signal strength while in a standby state; and data communication with the base station 20 If it is possible to determine whether this is possible, and if data communication is possible, the third step (S30) to continue the corresponding data communication by returning to the second step (S20), and determined in the third step (S30) and the corresponding base station ( 20) and data communication is off If possible, the portable terminal 10 adjusts the output power by one level to increase the output power by the fourth step (S40) and attempts data communication again with the base station 20 at a high output power, and 1 by the step (S40). It is determined whether data communication with the base station 20 is possible at a high level of output power, and when data communication is possible, the fifth step S50 of returning to the second step S20 and the step S50 determine the base station ( 20, if data communication is impossible, it is determined whether the current output power of the mobile terminal 10 is the maximum output power, and if it is not the maximum output power, the sixth step S60 returns to the fourth step S40. And, if the current output power is the maximum output determined in the step (S60) and the state is displayed and set in the service area (NO SVC) shaded area, and the sleep state (SLEEP MODE) of the high frequency unit 100 Only the reception path is operated and the first step (S It consists of a seventh step (S70) for feeding back to 10).

The conventional operation method as described above will be described in detail with reference to FIG. 3. The portable terminal 10 receives a corresponding signal of a code division multiple access (CDMA) method from a base station 20 and is not connected to a call. If not (S10), the standby state waiting for the call connection and at the same time communicates the information such as the electronic serial number, unique number and received signal strength with the base station 20 through the data communication (S20).

When it is determined that such data communication is impossible (S30), the power output from the high frequency unit 100 of the mobile terminal 10 is adjusted by one level, and the base station 20 is adjusted to the adjusted high output power. Attempt to communicate data with (S40).

Even if the output power of the mobile terminal 10 is increased by one level as described above, if data communication with the base station 20 is impossible (S50), it is determined whether the current output power of the mobile terminal 10 is the maximum and the maximum output power is increased. If not, it returns to the fourth step (S40) to increase the output and then perform data communication with the base station again (S60).

In the case of using the maximum power that the mobile terminal 10 can determine as determined in step S60, the display unit indicates that the mobile terminal 10 is in a shaded area that cannot be serviced, sets a sleep state, and sets the reception path of the high frequency unit 100. It is operated only to operate (S70), and returns to the first step (S10).

In the prior art having the above configuration, when the mobile terminal 10 is in a shaded area where communication with the base station 20 is impossible, the output power is increased step by step to continuously repeat data communication with the base station 20 for a predetermined time and then sleep. Since the (SLEEP MODE) is set, the power consumption of the battery 80 increases, and thus there is a problem that the battery 80 cannot be used for a long time.

In addition, since the service life of the battery 80 is relatively short, the reliability of the mobile communication system decreases, and there is an inconvenience in use that requires frequent charging or replacement of the battery 80.

The present invention provides an operating power control device and operation method for blocking unnecessary consumption of battery power supplying operating power by setting a dormant state immediately when the mobile terminal is located in a shadowed area where mobile communication service is not available. For that purpose.

In order to achieve the above object, the present invention processes a communication signal transmitted / received by a mobile terminal using a code division multiple access method, and analyzes the received signal strength of a base station applied from a high frequency unit in a shaded area. A processor for outputting a no service signal of a level; A power supply unit supplying operation power to each of the functional units of the processor and the portable terminal by a corresponding control signal; A real time unit controlling an output of the power supplied by the power unit according to a no service signal applied from the processor; A high frequency unit selectively operating by a receiving unit or a transmitting / receiving unit by an operating power applied from the power supply unit to a control state, and applying a signal received by the receiving unit to the processor; A peripheral unit which operates the display unit by operating power applied from the power source unit, stores data applied from the processor, and outputs the data to the display unit by the corresponding control signal; And a first switch configured to input a no service signal of the processor and apply operating power output from the power supply unit to the peripheral unit.

In addition, the present invention devised to achieve the above object, the analysis of the signal applied from the high-frequency unit by the processor of the portable terminal, and maintains the standby state when the corresponding signal of a valid level is received from the base station and the base station and the portable A standby process of data communication for distinguishing terminals; A sleep mode process of controlling the power supply to selectively operate the reception path of the high frequency unit when it is unable to communicate with the base station using the data according to the above process; When the interrupt signal is input to the processor from the peripheral portion of the portable terminal, an interrupt process of controlling the first switch to be operated on and causing the corresponding display unit of the input / output unit to operate; When the processor analyzes the strength of the received signal applied from the high frequency unit and is located in the service area in which the signal of the base station is effectively received, the processor controls the power unit to apply operating power to the transmission and reception path of the high frequency unit and returns to the standby process. It is characterized by the power supply process.

Hereinafter, a shadow area operating power control device and a method of operating the portable terminal according to the present invention will be described with reference to the accompanying drawings.

4 is a configuration diagram of a shadow area operating power control apparatus of a portable terminal according to an embodiment of the present invention.

As shown in FIG. 4, the shadow area operation power supply control apparatus of the mobile terminal according to the embodiment of the present invention includes a mobile station mode (MSM) 110, a power supply unit 120, a battery BAT 130, and a real time system. The unit 140 includes a high frequency unit 150 and a peripheral unit 160.
The MSM 110 analyzes the received signal strength (RSSI) of the base station 20 received through the high frequency unit 150 to determine whether the mobile terminal is located in a shadow area, and operates the mobile terminal with low power consumption. A control signal for outputting the signal, for example, a low level NO service signal (NO_SVC) is output, and a control signal for operating some circuits in a full power state according to a user's input.

The power supply unit 120 is operated by the control signal P_EN of the MSM 110 and the mobile terminal 10 to supply the operating power of each functional unit.
The battery 130 supplies operating power to the power supply unit 120 and the real time unit 140.

The real time unit 140 operates according to a no service signal (NO_SVC) applied from the MSM 110 to automatically turn off the power unit 120 in a shaded area, and then periodically outputs an interrupt clock signal INT CLK. It performs the role of periodically turning on the off power supply unit 120.
The real time unit 140 generates a real time clock unit (RTC: REAL-TIME CLOCK) 142 which generates an interrupt clock signal INT_CLK when a low level NO service signal is input from the MSM 110. An AND gate 144 for ANDing the no service signal NO_SVC and the power hold signal PS_HOLD output from the MSM 110; A first diode 146 for outputting the interrupt clock signal INT_CLK output from the real time clock unit 142 to the enable terminal P EN of the power supply unit 120, and an output from the AND gate 144. The second diode 148 outputs a signal to the enable terminal P EN of the power supply unit 120.

The high frequency unit 150 applies the signals RX_I and RX_Q received through the reception path to the MSM 110.

The peripheral unit 160 includes an input / output unit 162 including a keyboard and a display unit, and a memory unit 164 for storing a program required for the operation of the portable terminal and data generated in the operation of the portable terminal.

In addition, the present invention is the first switch 170 for switching the power of the power supply unit 120 is applied to the peripheral portion 160, and the on-switch for applying the operating power applied from the power supply unit 120 from the outside ( ON_SW) outputs a 19.68 MHz clock signal when the second switch 180 outputs to the corresponding function unit and the operation power signal is applied from the second switch 180, and the operation power signal is not applied. Otherwise, it outputs a 32.768 KHz clock signal.

delete

delete

delete

delete

delete

delete

delete

Referring to the operation of the shadow area operating power control device of the mobile terminal according to an embodiment of the present invention configured as described above are as follows.

Distinguishing the case where the mobile terminal 10 is located in the shadow area out of the service area of the base station 20 and the case where the mobile terminal 10 is located in the service area of the base station 20 may carry a signal transmitted by the base station 20. It is judged by what level the terminal 10 receives, and based on -122 dBm in a code division multiple access (CDMA) mobile communication system.

The portable terminal 10 analyzes a received signal strength (RSSI) of a signal transmitted from a specific channel of the base station 20 and receives the received signal when receiving the received signal strength (RSSI) of a level greater than -122 dBm. When the signal is amplified and effectively used, and received at a received signal strength (RSSI) of less than -122 dBm, the received signal cannot be effectively used even if the received signal is amplified.

Accordingly, the MSM 110 receives the code division multiple access signal signals RX_I and RX_Q through the high frequency unit 150 and analyzes the received signal strength. As a result of the analysis, when the received signal strength is less than -122 dBm, the MSm 110 determines that the mobile terminal is in a shadow area where the mobile communication service is not currently available, and provides a low level NO_SVC signal. Outputs through GPIO: GENERAL PURPOSE INPUT / OUTPUT (GPIO) terminal. When the mobile terminal 10 is in the service area, a high level NO service signal and a low level power hold signal PS_HOLD are output.

That is, when the mobile terminal 10 is located in a shadow area that cannot communicate with the base station 20 at an effective level, the MSM 110 generates a low level no service signal (SVC) and a power hold signal. Outputs (PS_HOLD).

The low-level no service signal SVC and the high-level power hold signal PS_HOLD are AND-operated at the AND gate 144 of the real-time unit 140 and are output at the low-level AND gate 144. Is input to the enable terminal (P EN) of the power supply unit 120 through the second diode (148). Therefore, the power supply unit 120 is automatically turned off by the low level signal.
At this time, the real-time clock unit 142 starts an operation by the low level no service signal input through the RTC_IN terminal, which is a low active terminal, and outputs an interrupt clock INT_CLK. The generated interrupt clock is applied to the enable terminal P_EN (POWER ENABLE) of the power supply unit 120 through the first diode 146 so that the power supply unit 120 is periodically turned on and off by the interrupt clock INT_CLK. Therefore, when the mobile terminal is located in the shadowed area, the power supply unit 120 is automatically turned off and the power supply unit 120 is periodically operated by the interrupt clock INT_CLK, and the MSM 110 is operated. By measuring the received signal strength, it is possible to confirm whether the mobile terminal deviates from the shaded area.

Among the functional configurations of the mobile terminal 10, the high frequency unit 150 consumes a lot of power, and the power of the high frequency unit 150 transmits more power in the transmission path TX TX and RX PATH. Consume.

When the mobile terminal 10 is located outside the service area of the base station 20 in the shaded area, communication is not possible, and thus, it is not necessary to operate the transmission path of the high frequency unit 150 that consumes a lot of power. Since the reception path may allow the mobile terminal 10 to reenter the service area of the base station 20, the reception path is always maintained in order to confirm that the mobile terminal 10 enters the service area again.

In addition, as a display unit of the input / output unit 162 constituting the peripheral unit 160 of the configuration of the mobile terminal 10, the display unit is generally made of LCD (LCD) and under the control of the MS (110) memory unit ( 164 to display data to be applied or to display the data to be applied to the MS 110, the data displayed on the display unit is an image (IMAGE) containing numbers, symbols, characters, using light transmittance control In addition, since the display unit has a large area to be controlled and a backlight is required in some cases, the display unit is a functional unit having a large power consumption.                     

In the MSM 110, when the mobile terminal 10 is in a shaded region, the operating power output from the power supply unit 20 is turned off by the first switch 170 turned off by a low-level power hold signal PS_HOLD. The display unit constituting the input / output unit 162 may be prevented from being applied to the input / output unit 162.

As described above, when the mobile terminal 10 is located in a shaded area that does not use the mobile communication service at all, the power supply unit 120 and the power supply unit 120 cut off power supply to the transmission path and display unit that consume the most power. By operating in the sleep mode (SLEEP MODE), the current of the battery 130 is consumed less and the life is long.

In particular, when the mobile terminal 10 is located in the shaded area, since the MS 110 operates in a sleep mode immediately (SLEEP MODE), compared to the prior art that attempts to communicate with the base station 20 for a predetermined time Thus, the life of the battery 130 is long.

In the above sleep state (SLEEP MODE), the mobile terminal 10 does not receive a mobile communication service by accessing the base station 20, but has its own functions, for example, a phone book, a diary, an electronic notebook, a game, a text. It can handle additional service functions such as message inbox cleanup and so on. Subsequently, when a control signal for using its own function of the mobile terminal 10 is applied through the keyboard configuring the input / output unit 162, a low service NO_SVC signal is output and high ( HIGH) Outputs power hold (PS_HOLD) signal.

The power hold signal PS_HOLD is applied to the AND gate 144 constituting the real time unit 140 and to the first switch 170. Since the AND gate 144 performs an AND operation and is applied to the power supply unit 120 through the second diode 148, the transmission unit or the transmission path of the high frequency unit 150 does not continue to be supplied with operating power, and thus cannot operate. The first switch 170 is turned on to apply operating power output from the power supply unit 120 to the input / output unit 162 of the peripheral unit 160. The display unit made of LCD (LCD) is operated, and various additional services provided by the portable terminal 10 may be used.

At this time, when the mobile terminal 10 enters and is located in the service area of the base station 20, the corresponding signals RX_I and RX_Q of the base station 20 received through the receiving unit or the receiving path of the high frequency unit 150 are received. The MS 110, which is applied and analyzed, determines that the received signal strength (RSSI) is greater than or equal to a predetermined effective level of -122 dBm, and therefore, the NO service signal (NO_SVC) output to the GPIO terminal is high. Outputs the power hold signal PS_HOLD at the high level while outputting at the high level.

The NO_SVC signal and the power hold signal PS_HOLD signal output at the high level are ANDed at the AND gate 144 of the real-time unit 140 to output a HIGH signal. The signal output at the high level from the AND gate 144 is applied to the power supply unit 120 through the second diode 148. Therefore, the power supply unit 120 operates normally to supply the operating power to both the transmission path and the reception path of the high frequency unit 150 so that the transmission and reception unit operates simultaneously so that the mobile terminal 10 is controlled by the MSM 110. It operates in the standby mode for data communication with the base station 20.

In addition, since the high-level power hold (PS_HOLD) signal output from the MSM 110 is applied to the first switch 170, the operation power is supplied to the input / output unit 162 constituting the peripheral unit 160. When applied, the display unit made of LCD (LCD) is normally operated.

Hereinafter, a method of operating a mobile terminal shadow area operating power control apparatus according to the present invention will be described in detail with reference to the accompanying drawings.
5 is a flowchart illustrating a method for operating a shadow area operating power control device of a mobile terminal according to an embodiment of the present invention.
As shown in FIG. 5, the MS 110 of the mobile terminal 10 processes a signal received from the base station 20 to analyze a magnitude of a received signal strength (RSSI) and to receive the received signal strength (RSSI). ) Receives a valid signal of a level greater than or equal to -122 dBm (S100), and when receiving a valid signal of a level greater than or equal to -122 dBm from the base station 20 in the determination (S100), The mobile terminal 10 enters and waits for a call connection and is assigned to an electronic serial number (ESN) of the mobile terminal 10 through a corresponding data communication with the base station 20, and is allocated and added to the mobile communication system. Information such as unique telephone number (ID), signal strength (RSSI) value of the signal received from the base station 20, etc. to the base station 20, and information of the channel information, etc. from the base station 20, data communication. Receive through It is.

The mobile terminal 10 which continues the above-described data communication with the base station 20 may continue to analyze and determine the signal strength (RSSI) of the signal received from the base station 20 to effectively communicate with the base station 20. Determining whether it is located away from the distance or in the shadowed area (S120), if the location is located in the shadowed area in the determination (S120), the power supply unit 120 is turned off under the control of the MSM 110, the real-time section Sleeping or sleep mode (140) operates and periodically operates the power supply unit according to the interrupt, supplying the operating power only to the reception path of the high frequency unit 150, immediately consuming a minimum of the battery 130 current (SLEEP) MODE) to operate (S130).

When the mobile terminal 10 operating in the dormant state or the sleep mode as described above is input the control signal to the MSm 110 through the keyboard of the input / output unit 162 in order to use its own additional service function ( In operation S140, the MSM 110 applies a power hold signal PS_HOLD to the first switch 170 so that the operating power output from the power supply unit 120 is an LCD of the input / output unit 162. To be applied (S150).

Even when the mobile terminal 10 is operated in a dormant partner or sleep mode as described above, the peripheral unit 160 may normally operate its own additional service.

When the mobile terminal 10 controlling the operation power in the shadow area as described above is located in the service area receiving a signal of the effective strength from the base station 20, that is, the MSM 110 If the received signal strength (RSSI) of the analysis is a level of -122 dBm or more (S160), by controlling the real-time unit 140 to control the power supply unit 120 to operate normally of the high frequency unit 150 Operating power is applied to both the transmission path TX PATH and the reception path RX PATH (S170), and the call is waited by the call connection by returning to the waiting process S110.

Therefore, when the mobile terminal 10 according to the present invention is located in a shaded area or a long distance where the signal of the base station 20 cannot be effectively received, the mobile terminal 10 consumes a minimum current from the battery 130. Immediately enters the sleep mode to extend the life of the battery 130, and can immediately use its own function of the mobile terminal 10 even in the sleep mode or the sleep state as described above.

According to the present invention having the above configuration, when the mobile terminal is located in the shadowed area, it immediately operates in the sleep mode to consume the minimum current and receive a signal from the base station, thereby extending the battery life.

In addition, since the function of the portable terminal immediately uses even in the state of operating in the sleep mode, there is a convenient use effect.

In addition, since the battery life of the portable terminal is long, there is a convenient effect in using the product reliability is improved.

Claims (10)

A power supply unit supplying operation power to each functional unit of the portable terminal; A real time unit generating an interrupt clock signal of a predetermined period; And a processor configured to automatically turn off the power unit and turn on the real-time unit when the portable terminal is located in the shadowed area so that the power unit is periodically operated by an interrupt clock signal output from the real-time unit. Shadow area operating power control device of the terminal. The method of claim 1, A first switch configured to output operating power applied from the power supply to a peripheral portion; A second switch outputted to the function unit by an external on-switch signal, An oscillator for generating and outputting a clock signal in which the processor operates normally according to an operation power signal applied from the second switch; And a battery for supplying operation power to the power supply unit and the real time unit. The method of claim 1, wherein the real-time unit An AND gate for ANDing the no service signal and the power hold signal output from the processor; A real time clock unit generating an interrupt signal of a predetermined period when the portable terminal enters a shaded area and the furnace service signal becomes low level; A first diode configured to apply the interrupt signal to an enable terminal of a power supply unit; And a first diode configured to apply an output of the AND gate to an enable terminal of the power supply unit. The method of claim 3, wherein the real-time unit The shadow area operating power control device of the portable terminal, characterized in that the portable terminal is automatically turned off when the shadow area. delete The method of claim 2, wherein the peripheral portion, An input / output unit receiving operating power from the power supply unit through the first switch, visually displaying a signal output from the processor on a display unit, and applying a control signal input from the keyboard to the processor; And a memory unit configured to receive operating power from the power unit, store data input from the processor, and output corresponding data to the input / output unit under control of the processor. Measuring the intensity of the received signal; When the measured intensity of the received signal is less than the reference value and the mobile terminal is located in the shadow area, turning off the operation of the power supply unit supplying the operation power to each functional unit and operating a real time clock unit generating an interrupt clock signal having a predetermined period; ; And periodically operating the power supply unit by using the interrupt block signal generated by the real time clock unit. 8. The shadow area operation of claim 7, further comprising: selectively shutting down power supplied to a transmission path of a high frequency unit and selectively operating a reception path when the mobile terminal is in a shadow area. How to operate the power control unit. The method of claim 7, further comprising the step of selectively providing the operating power generated by the power supply to the peripheral part when a predetermined key input is received from the outside. The method of claim 7, wherein when the portable terminal leaves the shadow area, the power unit is turned on and the real time clock is turned off.

Images