KR100303877B1 - Time protection device and method of portable terminal - Google Patents

Abstract

The present invention relates to a circuit and a method for protecting time information of a mobile terminal for mobile communication. In particular, the present invention relates to a time information even when a mobile terminal, which has used up all its batteries, is located in an unserviceable area where radio waves cannot be received from a base station. The present invention relates to providing a mobile communication terminal; A time display unit receiving time information from a mobile communication base station and displaying time and schedule management; A clock generator which receives and stores time information from the time display unit and synchronizes its own clock, and supplies time information generated by itself to the time display unit when time information is not received from the time display unit; It consists of a diode for blocking the reverse leakage current and a capacitor for charging and discharging the current, when the power supply is interrupted from the battery power supply of the terminal, characterized in that the auxiliary power supply for supplying auxiliary power to the time display unit and the clock generator Even when entering the shaded area, time information can be displayed by using the internal clock signal generated by the clock generator, and the power can be used for a predetermined time by receiving power from the auxiliary power supply. And it is effective to reduce the inconvenience of the terminal user.

Description

Device and method for protecting time of portable terminal

The present invention relates to a circuit and a method for protecting time information of a mobile terminal for mobile communication, and more particularly, when a mobile terminal, which runs out of batteries, is located in a no service area where radio waves cannot be received from a base station. It also relates to providing time information.

The CDMA mobile terminal can use various additional services provided by the service provider for the convenience of the user. Among them, when using the time information provided from the CDMA base station in real time, the alarm is provided, the current time is provided, and the electronic notebook function. Etc. is a service useful to a mobile terminal user.

However, when the radio wave of the base station is located in the No Service Area that does not reach the mobile terminal or the terminal, there is a problem that the above time information cannot be received in the terminal in real time.

Hereinafter, an apparatus for using time information of a portable terminal according to the prior art will be described with reference to the accompanying drawings.

1 is a functional block diagram of a time information using apparatus of a conventional mobile communication system.

The time information using apparatus of the mobile communication system according to the prior art, the base station 10 for transmitting the time information in real time through a specific control channel (Control Channel),

A receiving unit 30 for receiving time information from the base station 10 in real time; It consists of a terminal 20 comprising a time display unit 40 for displaying the time information by using the time information received in real time from the receiving unit 30.

Hereinafter, a device for using time information of a terminal according to the prior art will be described in detail with reference to FIG. 1.

As the mobile communication system is digitalized, the circuit configuration can be simplified and downsized by receiving and using the time information transmitted from the base station 10 without generating the time information required by the terminal 20 by itself. Let's do it.

In particular, in the CDMA mobile communication system, the digital communication method is used to identify and control the terminal 20 through a control channel, and at the same time, the terminal 20 needs time information. Transmits in real time.

In the digital terminal 20, a clock signal is essential for processing the corresponding data signal, and when the time information is supplied from the base station 10 as described above, the terminal 20 does not have to have a corresponding circuit, and thus, the size Has the advantage of reducing the battery consumption at the same time.

However, when the terminal 20 is located in an area (No Service Area) or a shadow area that cannot receive a signal from the CDMA base station 10, communication (basic communication), which is a basic function of the terminal 20, may be performed. Since the terminal 20 can operate normally only in an area receiving the signal from the base station 10.

Accordingly, it is not necessary to generate a clock clock required by the terminal 20 by itself, but to receive time information transmitted by the CDMA base station 10 and use it as a clock of the terminal 20. The size can be reduced, the price can be reduced, and the terminal 20 can use more accurate clock information than the clock generated by itself.

However, when the terminal 20 is located in a shadow area where radio waves cannot reach, the CDMA terminal 20 according to the prior art having the above configuration may receive time information transmitted from the base station 10. In addition, the time display function, alarm function, etc. of the terminal cannot be utilized, and the electronic notebook function of schedule management applied to the terminal is applied in accordance with various expected functionalization trends of the terminal 20 in the future. There was a problem that was difficult to do.

In addition, when the battery in use is exhausted unexpectedly, there was a problem of not using the same function as the electronic notebook as well as time.

According to the related art, the terminal does not receive time information data from the base station because the CDMA terminal is located in a radio shadow area or the battery for charging and discharging is discharged to supply power to the terminal. In case of failure, it is an object of the present invention to provide a time protection device and method for a portable terminal that can receive a clock as data from a clock generator that operates by receiving power from an auxiliary power supply and use the time information.

The present invention devised to achieve the above object is a mobile communication terminal; A time display unit for receiving time information from a mobile communication base station and displaying time and schedule management; A clock generator which receives and stores time information from the time display unit and synchronizes its own clock, and supplies time information generated by itself to the time display unit when time information is not received from the time display unit; A portable terminal comprising a diode for blocking a reverse leakage current and a capacitor for charging and discharging a current, and an auxiliary power supply for supplying auxiliary power to the time display unit and the clock generator when the power supply is interrupted from the battery power supply unit of the terminal. Features a time protection device.

In addition, the present invention provides a mobile communication terminal, comprising: a clock receiving step of receiving CDMA clock information through a receiving unit, a determining step of receiving the CDMA clock and determining whether power supply is continued; In the above determination step, when the CDMA clock is not received or the power supply is stopped, the auxiliary power supply unit is powered on, the clock data stored in the RAM of the time display unit is read, and the clock data of the time display unit is transferred to the clock generator. A storing step of storing; The clock generator is characterized by a time protection method of a portable terminal comprising a clock synchronization step of synchronizing the internal clock in synchronization with the applied CDMA clock information, supplying the internal clock, and feedback to the determination step.

1 is a functional block diagram of a time information using apparatus of a conventional mobile communication system,

2 is a functional block diagram of a time protection device of a portable terminal according to the present invention;

3 is a detailed functional block diagram of a time protection device according to the present invention;

4 is a flowchart illustrating a time protection method of a portable terminal according to the present invention.

Explanation of symbols on the main parts of the drawings

10: base station 20: terminal

30: receiver 40: time display unit 40

50: clock generator 60: auxiliary power supply

70: battery

Hereinafter, an apparatus and a method of protecting time of a portable terminal according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a functional block diagram of a time protection device of a portable terminal according to the present invention, FIG. 3 is a detailed functional block diagram of a time protection device according to the present invention, and FIG. Is a flowchart for a time protection method of a portable terminal.

The present invention relates to an apparatus and method for protecting time information of a portable terminal (20) by adding an auxiliary power supply (60) and a clock generator (50) to a CDMA mobile terminal (20). 2 to 3, a time protection device of a portable terminal or a portable terminal 20 according to the present invention will be described. Voice signal, data and time information from the base station 10 of the CDMA mobile communication system Receiving unit 30 for receiving the real time (Real Time) and the like,

A time display unit 40 receiving time information from the receiving unit 30 and storing the received time information in a memory of a RAM and displaying corresponding time information and schedule management information;

When the time information is received from the time display unit 40, the clock generated by itself is synchronized, and when the time information is not received from the time display unit 40, it is stored in the RAM. A clock generator 50 for supplying the internal clock, which is time information itself generated by receiving time information, to the time display unit 40;

When the power supply is interrupted from the battery power supply unit 70 of the terminal consisting of a diode (D1) for blocking the reverse leakage current, and a capacitor (C1) for charging and discharging the current, the time display unit 40 and the clock generator ( It consists of an auxiliary power supply unit 60 for supplying an auxiliary power to 50.

In addition, the time protection method of the portable terminal or the portable terminal 20 according to the present invention will be described with reference to the accompanying FIG. 4, the base station 10 through the receiver 30 of the portable terminal or the terminal 20. A clock receiving step (S11) for receiving the clock information of the CDMA transmitted from the SDMA,

A determination step (S22) of receiving the CDMA clock signal transmitted from the base station 10 by the receiving step (S11) and determining whether the power supply is continued;

In the above determination step (S22), when the receiver 30 does not receive the CDMA clock signal from the base station 10 or the power supply is interrupted, the clock generator 50 and the time from the auxiliary power supply 60 A storage step of supplying power to the display unit 40, reading clock data stored in the RAM of the time display unit 40 (S33), and storing the read clock data in the clock generator 50 (S44). Wow,

The internal clock is synchronized with the clock data information read from the RAM of the time display unit 40 by the storing step, and the synchronized internal clock is supplied to the time display unit 40 and the necessary part, and then the determination step ( A clock synchronization step (S55) for feeding back to S22;

In the determining step S22, when the CDMA clock is received and power supply is continued, the clock data applied from the receiving unit 30 is applied to the RAM, which is the memory of the time display unit 40, and stored. After that, it is composed of a clock supply step (S66) for feeding back to the determination step (S22).

Hereinafter, the time protection device and the method of the portable terminal according to the present invention by the configuration as described above will be described in detail with reference to FIGS.

In the CDMA mobile communication system, various control data such as voice channel assignment, terminal ID number confirmation, and transmission / reception level adjustment are performed by a base station (BTS) 10 through a corresponding control channel. 20) send and receive each other.

In addition, the clock signal precisely generated in the CDMA mobile communication system is wirelessly transmitted to the plurality of mobile terminals 20 located in each service area through the control channel of the support station 10.

In the receiving step S11, the receiving unit 30 of the terminal 20 receives the CDMA data signal corresponding to the CDMA scheme through a control channel, thereby extracting time information, and extracts the extracted time information from the time display unit 40. Applies to and displays.

In the determination step (S22), it is determined whether the clock data signal of the time information is received from the CDMA base station 10, and whether the power supply from the battery power supply unit 70 is continued or stopped.

As a result of the determination (S22), power is supplied from a charge / discharge battery (Battery) 70, which is a power supply unit of the CDMA type mobile terminal 20, and time information is transmitted from the base station 10 to the receiving unit of the terminal 20 ( In the case of receiving in real time in step 30), the received time information is recorded / stored in the RAM of the time display unit 40 and output to the clock generator 50 (S66).

The clock generator 50 synchronizes an internal clock, which is time information generated internally by itself, by the time information input through the time display unit 40.

The time display unit 40 displays the current time using the time information received from the CDMA base station 10 through the control channel, and also displays a schedule management result by an electronic notebook function or the like. do.

However, as an example, if the determination result (S22), the CDMA base station 10 does not receive the clock signal corresponding to the time information in real time (Real Time), that is, the terminal in the shadow area (Shadow Area) When entering or out of the service area of the base station 10, the auxiliary power supplied from the auxiliary power supply unit 60 by the corresponding control signal of the terminal 20, the time display unit 40 and the clock generator ( 50, or read the corresponding clock signal which is time information stored in RAM (RAM0) of the time display unit 40 (S33), and apply the clock generator 50 to store it in the corresponding recording device (S44). .

The clock generator 50 generates an internal clock synchronized with the clock signal which is input time information, and supplies the generated internal clock to a function different from the time display unit 40, and then determines the operation (S22). Feed back to (S55).

As an example, the process described above will be described in more detail. When the terminal 20 is located in the service area of the CDMA base station 10, the time display unit 40 displays the current time using the received time information. In addition, while storing in the RAM (RAM) and at the same time (Enable) connected between the time display unit 40 and the clock generator 50, and stored between the time display unit 40 and the clock generator 50 By setting the enable line to the "HIGH" state, the time information stored in the RAM is output to the clock generator 50 and the corresponding functional unit through the serial data DATA preference. .

Accordingly, the clock generator 50 synchronizes the internal clock based on the input time information, and the time display unit 40 can use the time information.

As another example, when the charging / discharging battery 70, which is a power supply unit of the terminal 20, is discharged, it becomes impossible to supply operating power to each functional unit of the terminal 20, that is, a CDMA base station ( In the service area of 10), but when the time information signal to be transmitted is not received, when it is recognized in the determination step (S22) that the supply of power and the time information have not been received, the storage step ( Proceed to S33).

At this time, the auxiliary power supply unit 60 receives power from the battery 70 and outputs the current accumulated in the capacitor C1 to the clock generator 50, the time display unit 40, and the corresponding functional unit, and outputs a diode ( The current flows back to the battery 70 through D1) and prevents it from flowing backward.

Therefore, the time display unit 40 continuously receives real-time time information through the receiving unit 30, stores it in RAM, displays the current time, and outputs time information to a corresponding function unit.

The clock generator 50 continues to operate the internal clock in synchronization with the time information input from the time display unit 40.

As another example, when the terminal 20 is out of the service area of the base station 10 as a result of the determination in the determination step S22, time information stored in the RAM of the time display unit 40 is stored. It is read by the clock generator 50.

The clock generator 50 generates a synchronized internal clock signal using the read time information, and outputs the synchronized internal clock signal to the time display unit 40 and a corresponding functional unit.

Accordingly, the time display unit 40 can display the current time even when it does not receive time information in real time from the CDMA base station, and can perform functions such as an electronic notebook.

As described above, even when the battery 70 of the terminal 20 is exhausted or when entering the shadow area and not receiving the time information from the base station 10 in real time, the power is supplied from the auxiliary power supply 60. The authorized time display section 40 and clock generation section 50, and the functions of the electronic organizer can be operated. Thus, the current time can be displayed, a schedule management function, and the like can be displayed.

The portable terminal according to the present invention having the above configuration can display time information by using the internal clock signal generated by the clock generator even when the battery power is exhausted or enters the shadow area. Receiving power from the auxiliary power supply, there is an effect that can use the time information for a certain time and reduce the inconvenience of the terminal user.

Claims (3)

In the mobile communication terminal, A receiver for receiving time information from a mobile communication base station in real time; A time display unit for receiving time information from the receiving unit and storing the received time information in a memory and displaying corresponding time information and schedule management information; The internal clock generated by itself is synchronized by receiving time information from the time display unit. When the time information is not received from the time display unit, the internal clock generated by the time information stored in the RAM is applied to the time display unit. A clock generator for supplying It consists of a diode for blocking the reverse leakage current and a capacitor for charging and discharging the current, when the power supply is interrupted from the battery power supply of the terminal, the time display portion and the auxiliary power supply for supplying auxiliary power to the clock generator. Time protection device of the portable terminal. In the mobile communication terminal, A clock receiving step of receiving clock information of CDMA through a receiving unit; A determination step of receiving the CDMA clock and determining whether power supply is continued; In the above determination step, when the CDMA clock is not received or the power supply is stopped, the auxiliary power supply unit is powered on, the clock data stored in the RAM of the time display unit is read, and the clock data of the time display unit is transferred to the clock generator. A storage step for storing, And a clock generating step comprising a clock synchronizing step of synchronizing an internal clock, supplying the internal clock, and returning to the determining step in synchronization with the applied CDMA clock information. The method of claim 2, In the determining step, if the CDMA clock is received, and the power supply continues, the clock supply step of applying the clock data applied from the receiver to the RAM of the time display unit, and then returns to the determination step How to protect your time on a portable terminal.