KR100389833B1 - Method for storing and controlling dial digits of digital mobile phone - Google Patents

Abstract

PURPOSE: A method for storing and controlling dial digits of a digital mobile phone is provided to store a phone number in a memory during a call communication without generating a DTMF(Dual Tone Multi-Frequency). CONSTITUTION: A CPU checks whether a DTMF tone generation restraining mode curing a call has been set(50). If the DTMF tone generation restraining mode has not been set, the CPU transmits a KP(dial Key Press) message to a base station(52). If the DTMF tone generation restraining mode has been set, the CPU transmits a dial number to be displayed on an LCD(54) and stores the dial number in a RAM(56). The CPU checks whether a DISP(DISPlay) message is received from the base station(58). If the DISP message is received, the CPU analyzes the DISP message and displays a dial number on the LCD(60), and checks whether a call termination key is inputted(62). If a call termination key is inputted, the CPU stores data of the dial number in an EEPROM(64).

Description

How to control dial digit storage for digital cordless phones

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling dial number storage of a digital cordless telephone. In particular, when a telephone number is stored in a memory while a call link with a wireless base station is established, a dual tone multi-frequency tone (DTMF) tone is used. It relates to a control method for storing a dial number without generating a).

In general, a wireless switching system installs at least one or more wireless base stations in units of cells constituting one communication area, and uses a cordless portable part at a predetermined distance from the wireless base station. It is configured to make outgoing and incoming calls freely by using Handset (or digital cordless phone or mobile phone, which is collectively called wireless terminal).

The wireless base station is connected to a wireless exchange to transmit and receive data required for a call processing service. In addition, the wireless base station performs a link setting function by scanning an idle channel capable of link setting by a link setting request of a wireless terminal. The portable wireless terminal as described above is being changed to digital system of FDMA / TDD (Frequency Division Multiple Access / Time Division Multiplex) due to the development of digital mobile technology.

When such a wireless terminal is used at home, it is used like a conventional wireless telephone through a home base station. In places such as offices, it is possible to register and use with a wireless PABX, and when going out, it has a function of a general mobile wireless telephone (mobile phone) by using a tele-point, which is a public base station.

1 is a block diagram of a general wireless switching system, for example, a private base station (hereinafter referred to as "base station" in the description of the present invention) connected to a private or PSTN exchange. The base station 10 having the configuration as shown in FIG. 1 wirelessly transmits ring data for calling the corresponding wireless terminal in response to an in-comming call from a wired private or PSTN. And in response to receiving the link formation request message propagated wirelessly from the wireless terminal, it has a function of forming a mutual communication link and receiving and processing various signals transmitted from the wireless terminal.

2 is a block diagram of a wireless terminal 20 used in a general wireless switching system. The wireless terminal 20 configured as shown in FIG. 2 forms a call channel in response to receiving ring data from the base station 10 as shown in FIG. 1 to perform a voice call. After the link between the base station 10 and the wireless terminal 20 is established, A dial key message (hereinafter, referred to as a "KP message") from the terminal 20 is wirelessly transmitted to the base station 10 so as to perform dialing.

FIG. 3 is a flowchart illustrating a procedure of controlling a dialing protocol between a private base station or a wireless private exchange, a telepoint, and a wireless terminal shown in FIG.

First, referring to FIGS. 1 to 3, in the operation of the conventional dialing process, only the configuration and operation necessary for the process of transmitting and receiving a dialing message between the wireless terminal and the base station will be described. It should be noted that will be omitted.

Now, after the call link between the wireless terminal 20 and the base station 10 is established, the user selects and presses a dial key located on the keypad 23 in Fig. 31 to make a call. Uint: CPU 22 is a dial key press message (hereinafter referred to as "KP message") of a cordless telephone second generation-common air interface (CT2-CAI) corresponding to the selected dial key in FIG. Create and feed it to TDD logic 24. The KP message transmitted to the TOD logic 24 is transmitted to the air through the RF unit 21 in which the transmission / reception mode is switched under the control of the CPU 22.

As described above, the KP message transmitted (or propagated) to the air is input to the RF unit 13 through an antenna in the base station 10. The RF unit 13 in the base station 10 supplies the received demodulated data signal to the TDD logic 14. The TDD logic 14 separates the control data from the received data and supplies it to the CPU 12. The CPU 12 in the base station 10 analyzes the control data input from the TDD logic 14 to recognize the dial data (KP message). CPU 12 in base station 10, which recognizes the dial data, supplies digit data corresponding to the received KP message to DTMF tone generator 18.

The DTMF tone generator 18 in the base station 10 generates DTMF tones corresponding to the digit data output from the CPU 12 and supplies them to the ADPCM 15. The ADPCM 15 ADPCM codes the input DTMF tones, and the coated DTMF tones are transmitted through a line interface 11 when the operation mode of the base station is a public base station in step 333. It is sent to the telephone line Tel-line. At this time, the output of the ADPCM 15 is wirelessly transmitted to the wireless terminal 20 through the TDD logic 14 and the RF unit 14.

The CPU 12 also displays a display message (hereinafter referred to as a "DISP message") indicating that dial data corresponding to the dial key selected in FIG. 34 is transmitted to the telephone line Tel-line. In the process, the data is transmitted to the wireless terminal 20 through the TDD logic 14 and the RF unit 13. At this time, the DISP message is a message of the type specified in CT2-CAI. The CPU 22 of the wireless terminal 20 configured as shown in FIG. 2 receives and analyzes the DISP message through the RF unit 21 and the TDD logic 24 and displays the dial number transmitted by the telephone line Tel-line on the LCD 29 as the display device. Mark in the process.

As described above, in the wireless switching system configured as shown in FIGS. 1 and 2, after a link is established between the wireless terminal 20 and the base station 10, a message of CT2-CAI is selected when a dial key located on the keypad 23 of the wireless terminal 20 is selected. It can be seen that the DTMF tone corresponding to the dial key is transmitted from the base station 10 by transmission and reception.

However, in the conventional wireless terminal, when a dial key is pressed during a call, DTMF tones are always generated from the base station 10 by transmitting and receiving a message with the base station 10, thereby making it impossible to perform a continuous call. In addition, when the transmission of the KP message to the base station is prevented due to the above reasons, the DISP message transmitted from the base station cannot be received, so that the dial digit is not displayed on the display device of the wireless terminal, making it very difficult to identify the telephone number. Done. Therefore, due to the problems described above, it is not possible to store a telephone number during a call in an internal memory area with a conventional wireless terminal. This problem can be seen that it is very difficult when the user of the wireless terminal 20 receives the telephone number from the other party in voice communication and uses the telephone number storage function of the wireless terminal 20. In addition, conventional conventional cordless telephones or digital cordless telephones generate DTMF tones corresponding to dial keys when a dial key is pressed during a call, and the call tone is cut-off, and normal calls cannot be made while the dial keys are pressed. .

Accordingly, an object of the present invention is to provide a method for controlling dial digit storage of a wireless terminal in which a telephone number can be stored during a call in a wireless terminal for establishing a call link with a wireless base station.

Another object of the present invention is to provide a control method capable of storing information of a telephone number in a terminal without affecting a call sound when a call is made between a base station and a wireless terminal.

Another object of the present invention is to provide a method for displaying and storing a dial number to be stored in a display device of a wireless terminal without transmitting the dial number of the wireless terminal to a base station.

In order to achieve the above object, the present invention provides a base station for generating a DTMF tone corresponding to a received dial number and outputting an indication message corresponding thereto, and generating a dial number by transmitting a link with the base station. A dial digit storage control method having a digital cordless telephone for receiving a display message and displaying the same on a display device, the method comprising: setting a DTMF tone generation suppression mode in response to an input of a DTMF tone generation suppression mode setting key; And storing the digits corresponding to the digits stored in the memory and the dial digits stored in the memory in the permanent storage memory in response to the termination of the call.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to obscure the subject matter of the present invention.

4 is a flowchart illustrating dial tone transmission mode setting control according to an embodiment of the present invention. This shows a process of setting / clearing the DTMF tone generation suppression mode in response to the selection of the DTMF tone generation suppression mode setting key installed on the keypad 23 of the radio terminal 20 while the radio base station 10 and the radio terminal 20 are in traffic.

5 is a flowchart of a dial selective transmission control according to an embodiment of the present invention. This is performed by searching whether the internal operation mode is the DTMF tone generation suppression mode when the dial key is pressed during a call, and the selected dial key input when the internal operation mode is the DTMF tone generation suppression mode during the search process. Displaying the corresponding dial number and storing the displayed dial number in an internal memory area in response to the termination of the call; and selecting the dial number message to the base station when the internal operation mode is not the suppression mode in which the DTMF is generated during the searching process. And transmitting and receiving a display message transmitted from the base station.

Hereinafter, a control operation for storing a dial digit in an internal memory according to the present invention will be described in detail with reference to FIGS. 1, 2, 4, and 5, and the wireless terminal 20 having the configuration as shown in FIG. It is assumed that a call channel between the base station 10 having the configuration as shown in FIG.

First, the wireless terminal 20 according to the present invention should be provided with a user interface for performing a telephone number storage function during a call. This user interface is provided on the keypad 23 of the wireless terminal 20 having the configuration as shown in FIG. For example, a key for setting the DTMF tone generation suppression mode during a call and a program for detecting the selection of the key. This program is stored in the CPU 22 shown in FIG.

Now, when the link between the base station 20 and the wireless terminal 20 is established and in a busy state, the CPU 22 of the wireless terminal 20 scans the keypad 23 and searches whether a key signal for setting a specific function is input. In this state, when a key for stopping the generation of the DTMF tone, for example, the DTMF tone generation suppression mode key is selected and a corresponding key signal is input, the CPU 22 searches for the current call in step 442. do. If not currently on the CPU, the CPU 22 sends the error message data to the LCD 29, which displays the error status. That is, if the DTMF tone suppression mode key is selected while not on a call, an error message is displayed.

If it is determined in step 40 that the call is in progress, the CPU 22 reads information on the flag set in the internal register to determine whether the current DTMF tone generation suppression mode is in step 44. If it is determined in step 44 that the current operation mode is not set to the DTMF tone generation suppression mode, the CPU 22 sets the operation mode of the current wireless terminal 20 to the DTMF tone generation suppression mode in step 46 and ends. This operation mode is set / released by setting or resetting the flags set in the internal memory area. This is because the KP message of CT2-CAI is not transmitted to the base station 10 even when a dial key for dialing is selected in a busy state. This operation will be more clearly understood by the contents describing the operation of FIG. However, if it is determined in FIG. 4 that the current operation mode is the DTMF tone generation suppression mode, the CPU 22 resets and releases the flag corresponding to the DTMF tone generation suppression mode in FIG. 48.

According to the operation sequence of FIG. 4 as described above, the wireless terminal 20 which is in communication with the base station 10 can select the dial key located on the keypad 23 even in a busy state so that the telephone number can be stored in the internal memory area. Set the mode to DTMF tone suppression mode or turn it off.

In the state in which the user has set the DTMF tone generation suppression mode by the sequence as shown in FIG. 4, the user selects and presses the dial (number) key located on the keypad 23 shown in FIG. When the dial key located on the keypad 23 is pressed while in a call, the third party's telephone number is notified from the other party and a record is required.

The CPU 22 of the wireless terminal 20 scanning the keypad 23 at predetermined intervals reads the flag set in the internal memory 30 in step 50 of FIG. 5 to check whether the DTMF tone generation suppression mode is set during a call. If it is determined that the DTMF tone generation suppression mode is not set in FIG. 5, the CPU 22 transmits a KP message of CT2-CAI corresponding to the dial key input from the keypad 23 to the base station 10 in step 52. do. The dial number corresponding to the KP message is stored in the RAM area located in the memory 30 in step 52.

If the DTMF tone generation suppression mode is set as a result of the search in step 50, the CPU 22 transmits and displays a dial number corresponding to the dial key selected from the keypad 23 on the LCD 29 in step 54, and then in step 56 The indicated dial number is stored in the RAM area located in the memory 30. Therefore, when the dial key is pressed to record the third party's telephone number in the state in which the DTMF tone generation suppression mode is set by the above operation, the KP message of CT2-CAI is not transmitted to the base station 10 but is immediately transmitted to the dial key number. It can be seen that the corresponding dial data is displayed directly on the LCD 29 as the display device.

In step 58, the CPU 22 of the wireless terminal 20 performing the process of FIG. 5 reads the output of the TDD24 and searches whether the DISP message corresponding to the transmission of the KP message is received from the base station 10. If it is determined that the DISP message is received from the base station 10 in step 58, the CPU 22 analyzes the DISP message received in step 60, displays the dial number on the LCD 29, and then terminates the call from the keypad 23 in step 62. Searches for input. When the dial key is pressed while the DTMF tone generation suppression mode is released in the above process, the KP message, which is the data of the dial number corresponding to the dial key, is transmitted to the base station 10, and the display message transmitted from the base station 10 (DISP). Message will be received and displayed.

If it is determined in step 58 that the DISP message is not transmitted from the base station 10, the CPU 22 of the wireless terminal 20 directly searches whether the call termination key is input in step 62 of FIG. If the call termination key is not inputted as a result of the search in step 62, the CPU 22 terminates the busy dial key processing routine. However, if it is determined in step 62 that the call termination key is input, the CPU 22 of the wireless terminal 20 stores data of the dial number stored in the RAM area of the memory 30 in the nonvolatile memory of the memory 30, for example, EEPROM, in step 64. . The CPU 22 terminates after canceling the DTMF tone generation suppression mode.

Accordingly, DTMF tones during a call can be selectively generated by the control as shown in FIGS. 4 and 5 described above. In addition, when the dial key is selected in the busy state of the DTMF tone suppression mode, the dial tone corresponding to the dial key is displayed without storing the KP message of the CT2-CAI and stored in the nonvolatile memory. Cut-off can be eliminated.

As described above, the present invention transmits a KP message corresponding to a dial key to a base station in a wireless terminal that transmits / receives a message between a wireless base station and CT2-CAI and dials the DTMF tone generation suppression mode during a call. In addition, the phone number can be stored even in a call state by simultaneously displaying the information on the display window of the wireless terminal.

1 is a block diagram of a wireless base station used in a general wireless switching system.

2 is a block diagram of a wireless terminal used in a general wireless switching system.

3 is a flowchart illustrating a process of controlling a dialing protocol between a wireless base station and a wireless terminal in a general wireless switching system.

4 is a flowchart illustrating a dial tone transmission mode setting control according to an embodiment of the present invention.

5 is a flowchart of a dial selective delivery control according to an embodiment of the present invention.

Claims (6)

A base station for generating a DTMF tone corresponding to the received dial number and transmitting a display message corresponding to the received dial number, and forming a link with the base station to generate a dial number, and receiving and displaying a display message on the display device. A dial digit storage control method comprising a digital cordless telephone, Setting a dial signal generation suppression mode in response to selection of a dial signal generation suppression setting key, storing a digit corresponding to the dial key in a memory, and storing the dial digit stored in the memory in memory in response to a call termination; Dial digit storage control method of the digital cordless telephone, characterized in that it comprises a. The method of claim 1, wherein the memory is an EEPROM for permanently storing data. A base station for generating a DTMF tone corresponding to a received dial number and transmitting a display message corresponding thereto, and a digital form for forming a link with the base station, generating a dial number, and receiving and displaying a display message on a display device. A dial digit storage control method having a cordless telephone, A mode setting process of setting or releasing a dial signal suppression mode in response to selection of a dial signal suppression setting key; When a dial key is selected while the dial signal generation suppression mode is set, a corresponding dial number is displayed on the display device and stored in the RAM at the same time, and the dial number stored in the RAM is stored in the permanent storage memory in response to a call termination. A dial digit storage control method for a digital wireless telephone, comprising: storing a dial number for storing. 4. The method of claim 3, wherein the storing of the dial number stores the dial number stored in the RAM in an EEPROM in response to the termination of the call between the base station and the wireless terminal. 5. The method of claim 4, wherein the set dial signal generation suppression mode is released in response to the termination of the call. 4. The method of claim 3, wherein when a dial key is selected while the dial signal generation suppression mode is released, a corresponding KP message is transmitted to the base station, and a display message transmitted from the base station is received and displayed on the display device. And storing a second dial number.