KR970003976B1 - Method for controlling input/output state display of the cellular phone - Google Patents

Abstract

The method of controlling a display of an input/output state of a terminal includes: the steps (200,202) judging whether there is an key input while maintaining a reception standby state; the steps (204,206) judging whether the key input is a special key input and judging an output of a voice signal, in case that it is the special key input; the steps (208,210) outputting the voice signal in accordance with the special function key, in case of desiring to output the voice signal in accordance with the special function key, and not outputting the voice signal, in case of desiring not to output the voice signal in accordance with the special function key; the steps (212, 214) judging an output of the voice signal, in case that the key input in the step (204) is not the special function key input, and thereby, outputting a corresponding key, in case of desiring to output the voice signal; the steps (212,214) outputting the signal for displaying the key input on a screen; the steps (216,218,220) displaying the corresponding key on the screen, in case of desiring to display the key input on the screen, and not displaying the corresponding key on the screen, in case of desiring no to display the key input, after deciding to display the key input on the screen or not; the steps (222,224 and 226) storing a key value in a corresponding buffer, performing a normal operation of the terminal, if there is no more key input, and performing again from the step (204) judging whether there is the key input, if there is more key input.

Description

How to control the display of the input and output status of the terminal

1 is a block diagram showing an embodiment of a general DECT terminal.

FIG. 2 is a flow chart showing step by step an embodiment of general DECT terminal processing of FIG. 1 according to the DECT standard. FIG.

Figure 3 is a flow chart showing step by step an embodiment of a method for controlling the display of the input and output status of the terminal according to the present invention.

The present invention relates to a portable terminal of the DECT (Digital European Cordless Telecomm-unications) method, and more particularly, to a method of controlling the display of the input and output status of the terminal suitable for selectively displaying the input and output status.

In this regard, FIG. 1 is a block diagram showing an embodiment of a general DECT terminal, including a central processing unit (CPU) 2 having a baseband processing function for controlling overall operation of the terminal, A power supply unit 4 controlled by the central processing unit 2 to indicate a current power state of the terminal, a power supply unit 6 controlled by the central processing unit 2 to supply power for operating the terminal to the terminal system; A microphone 8 for converting a voice signal into an electrical analog voice signal, an analog-digital converter 10 for converting an analog voice signal of the microphone 8 into a digital signal, A which converts the digital voice signal of the analog-to-digital converter 10 into ADPCM (Adapative Differential Pulse Code Modulation) data and applies it to the Digital Signal Processing (DSP) processor (14). A digital signal processing processor 14 which communicates with a DPCM-PCM (Pulse Code Modulation) converter 12 and the central processing unit 2 to digitally process digital signals according to a speech coding method used in the DECT standard, PCM-ADPCM converter 16 for converting ADPCM data of digital signal processing processor 14 to PCM data, and digital-analog converter 18 for converting PCM data of PCM-ADPCM converter 16 into an analog signal. ), A speaker (20) driven by an analog signal of the digital-to-analog converter 18 to output voice, and a carrier for modulating voice data encoded by ADPCM from the central processing unit 2 Amplified signal of the signal synthesizer 22, amplified signal 24 of the signal synthesizer 22, and amplified signal amplified by the DECT. Propagates in the air and receives high-frequency signals in the air. Antenna 26 for low noise, a low noise amplifier 28 for receiving low frequency amplification of a high frequency signal from a fixed station received through the antenna 26 during a reception period, and a low noise amplifier 28 The intermediate frequency converter 30 converts the received high frequency signal into an intermediate frequency, and the original signal transmitted from the intermediate frequency of the intermediate frequency converter 30 is extracted and applied to the central processing unit 2. A control unit 32, an input unit 34 for making a call input to the central processing unit 2, a screen display unit 36 for displaying a bell state by receiving a signal from the central processing unit 2, and a central processing unit Buzzer 38 for generating a special sound generated for use of a terminal such as a key input and a beeper by receiving the signal of (2), and an initial state of the volume and various telephone numbers under the control of the central processing unit 2; Electrically Erasable Programm able Read Only Memory; EEPROM) 40, a ROM 42 storing data for the operation of the entire processor by the central processing unit 2, and a longitudinal operation by the central processing unit 2; And a RAM (Read Access Memory (RAM)) 44 which temporarily stores the parameters.

Referring to FIG. 2 of the general DECT terminal thus made, it is as follows.

First, the central processing unit (2) has a baseband processing function for controlling the overall operation of the terminal, the power display unit 4 is controlled by the central processing unit (2) to indicate the current power state of the terminal LED (Light Emitting Displayed using a light emitting device such as a diode so that the user can know the current state of the power on / off of the terminal.

Next, the power supply unit 6 is controlled by the central processing unit 2 to supply power for terminal operation, and the microphone 8 converts a voice signal by the user into an electrical analog voice signal, and converts the analog-digital signal. The unit 10 converts the analog voice signal of the microform 8 into a digital signal.

The ADPCM-PCM converter 12 converts the digital voice signal of the analog-to-digital converter 10 into ADPCM data and applies it to the digital signal processor 14, and the digital signal processor 14 performs central processing. It communicates with the apparatus 2 and processes the digital signal according to the speech coding method used in the DECT standard.

In addition, the PCM-ADPCM converter 16 converts ADPCM data of the digital signal processing processor 14 into PCM data, and the digital-analog converter 18 converts the PCM data of the PCM-ADPCM converter 16 into analog. The signal is converted to a signal, and the speaker 20 outputs a voice by the analog signal of the digital-analog converter 18 so that the user can hear the voice.

Next, the signal synthesizing unit 22 receives the voice data encoded by the ADPCM from the central processing unit 2 and modulates it in a carrier for modulation of 1.8 GHz for wireless transmission, and the signal amplifying unit 24 is a signal synthesizing unit 24. The modulated signal at 22 is amplified to a level defined by the DECT, and the antenna 26 propagates the amplified signal of the signal amplifier 24 in the air and receives the signal in the air.

Accordingly, the low noise amplifier 28 receives the 1.8 GHz signal of the fixed station received through the antenna 26 during the reception period of the terminal and performs low noise amplification, and the intermediate frequency converter 30 of the low noise amplifier 28 The received frequency of 1.8 GHz is converted into an intermediate frequency of 110 MHz, and the demodulator 32 extracts the original signal transmitted from the intermediate frequency of 110 MHz of the intermediate frequency converter 30 to the central processing unit 2. Is authorized.

In addition, the input unit 34 inputs a call to the central processing unit 2, and the screen display unit 36 receives a signal from the central processing unit 2 and uses a display element such as an LCD (Liquid Crystal Display) to terminate the call. The status is displayed and the buzzer 38 receives a signal from the central processing unit 2 to generate a special sound generated for use of a terminal such as a key input and a beep so that the user can hear it. The initial state of the volume and various telephone numbers are recorded by the central processing unit 2, and the ROM 42 stores the nonvolatile data for the operation of the entire terminal by the central processing unit 2, and the RAM 44 ) Temporarily stores the parameters for longitudinal operation by the central processing unit 2.

FIG. 2 is a flowchart showing step by step an embodiment of the general DECT terminal processing of FIG. 1 according to the DECT standard, that is, an algorithm of the central processing unit 2.

First, when the power is turned on, the initial value for the hardware (Hardware) is read from the ROM 42 or EPI rom 40 to initialize each hardware, and the RAM 44 is inspected and cleared. After operating a diagnostic program or the like to check the basic abnormality of the hardware, the radio base station receives signals from the wireless "channel 0" to the ninth through ten (100, 102, 104, 106, 108, 110, 112).

Next, the received electric field strengths of all 10 radio channels are examined to determine the connection to the wireless base station which emits the strongest wireless signal among them, and the criteria of various timings inside the terminal based on the signal sent from the wireless base station. (114).

Thereafter, the radio station checks whether there is an empty time slot by checking a time slot usage state of the wireless base station, and then performs a registration procedure (116).

At this time, the terminal enters the standby state after completing the registration procedure, the operation of the terminal proceeding in the standby state can be divided into four.

First, the terminal checks for the presence of a paging signal from the fixed station, and if there is a paging signal, first accesses a medium access control (MAC) layer to secure a time slot use right of the wireless channel. The connection of the DLC (Data Link Control) layer and the network (Network) layer are sequentially performed to form a call path and then proceed with the call (118, 120, 122, 124, 126).

Subsequently, due to any one call disconnection situation, network layer disconnection, DLC layer disconnection, and MAC layer disconnection are performed to release the radio channel and enter standby again (128, 130, 132).

On the contrary, if there is no paging signal, the terminal user checks a connection request to a specific subscriber, and if a request occurs, if there is an empty time slot by checking the existence of an empty time slot to secure use of the time slot. If the time slot is not empty, wait until the time delay does not exceed the set value until the end of the use of another user's time slot. When another user's use of the time slot ends, an attempt is made to access the MAC layer using the time slot (134, 136).

Subsequently, access to the MAC layer is secured to secure the time slot use right of the wireless channel, and access to the DLC layer and network layer are sequentially performed to form a call path and then proceed with the call (138, 140, and 142).

Subsequently, due to any one call disconnection situation, the network layer is disconnected, the DLC layer is disconnected, and then the MAC layer is disconnected to release the radio channel and enter the standby state again (144, 146, 148).

At this time, after there is no paging signal and the user's transmission request or the processing (step 132 or step 148) is completed, the state check in the terminal is performed.

A typical internal condition check is the voltage level check of the supply battery.

First, input the voltage of the battery through a circuit that converts analog signals into digital signals to check whether it is at an appropriate level. If it is below the appropriate level, a battery charge warning signal is generated to display a message such as, "Charge required." The user is notified of the need for charging, and receives a signal from the fixed station to check whether it maintains an appropriate signal level or whether the signal level is too low to attempt to connect to an adjacent fixed station (150, 152, 154, 156, 158).

If the fixed station's signal level is -83dBm or more, the signal state of the currently registered station is maintained as it is. If the signal level drops below a certain value and a mobile connection to the previous station is required, the radio channel is changed from "0" to " Up to 9 "in 10 (160,162,164,166,168,170,172).

Therefore, the received electric field strengths for all 10 radio channels are examined to determine the connection to the wireless base station that emits the strongest wireless signal in the district, and the various timings within the terminal are determined based on the signal sent from the wireless base station. Motivate to be the reference (174,176).

After that, the time slot usage state of the radio base station is checked to determine whether there is an empty time slot, and then handover is newly performed.

That is, in the standby state, as described above, it is determined whether or not there is a paging signal from the fixed station, and the processing thereof is performed, the transmission request of the user is processed and the processing thereof is performed, and it is checked whether the battery voltage is at an appropriate level. The basic form of the entire DECT terminal processing is to perform a process for it, inspect the signal level of the fixed station, proceed with the process, and perform various timer processing of the other terminal.

In addition, when a general telephone is inputted, a plurality of frequencies corresponding to the key value are generated, that is, two frequencies corresponding to the key can be confirmed by the user through a talker or a speaker mounted therein so that the user can confirm audibly. Will print

In addition, the key input contents are displayed on the LCD panel to visually check whether the input contents are appropriate.

All of these functions are necessary for preventing a malfunction or notifying the user of the occurrence for the convenience of the user.

However, the use of the terminal is not limited to the call in the future, it is possible to perform various application functions using the terminal.

For example, using the number buttons of the phone to look up a variety of useful information, or in the case of "home banking", such as to enter the password through the terminal to order the goods and also performs a function.

In the related art, when the key input value required for security such as the password of the personal account generated through the key input of the phone is not to be exposed to another person, the contents of the key input are sounded and exposed to another person. Functions such as being displayed on the LCD and visually exposed have a problem of exposing information that requires personal security.

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and when a key is input, it provides a method for controlling the display of the input and output status of the terminal to select whether or not to display the voice corresponding to the key value The purpose is.

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention for achieving the above object is as follows.

Referring to FIG. 3, FIG. 3 is a flowchart showing step by step an embodiment of a method of controlling the display of an input / output state of a terminal according to the present invention.

First, it is determined whether there is a key input while maintaining the reception waiting state (200, 202).

Next, it is determined whether the key input is a special function key input to determine whether to output a voice signal according to the special function key input (204, 206).

Subsequently, when a voice signal according to a special function key is to be output, a voice signal according to the special function key is output. On the contrary, when a voice signal according to a special function key is not output, the voice signal according to the special function key is not output (208, 210).

In the step 204 of determining whether the key input is a special function key input, when the key input is not a special function key input, it is determined whether to output a voice signal according to the corresponding key. Output audio signals (212,214)

Next, it is determined whether to display the key input on the screen, and if the key input is to be displayed on the screen, the corresponding key is displayed on the screen, and if the key input is not displayed on the screen, the key is not displayed on the screen (216, 218, 220). ).

Subsequently, if the key value is stored in the corresponding buffer and there is no key input, the terminal performs normal operation. If there is more key input, the method determines whether there is a key input (step 202, 224, 226).

As described above, the present invention allows the terminal user to select whether to generate a voice corresponding to the key value and to display a screen, so that important contents such as a personal password can be securely processed.

Claims (1)

Maintaining the reception standby state and determining whether there is a key input (200, 202); Determining whether the key input is a special function key input (204, 206) to determine whether to output a voice signal according to the special function key input; Outputting a voice signal according to the special function key if the voice signal is to be output, and not outputting the voice signal according to the special function key (208, 210); In the step 204 of determining whether the key input is a special function key input, when the key input is not a special function key input, it is determined whether to output a voice signal according to the key input. Outputting signals (212, 214); Determining whether to display the key input on the screen by determining whether to display the key input on the screen, if you do not display the key on the screen if you do not want to display the key input on the screen (216, 218, 220) Wow; Storing key values in a corresponding buffer and performing normal operation of the terminal if there are no more key inputs, and performing again from step 202 of determining whether there is a key input if there are more key inputs (222, 224, 226). A method of controlling the display of the input / output status of a terminal.