KR0125484B1 - Mobile telecommunication terminal using dtmf tone - Google Patents

Abstract

If a remote control wired telephone(101) or a terminal A(105) calls a terminal B(200) to transmit a programming command, the communication path is opened in the route of an wired exchange station(102), a wireless exchange station(103), a base station B(106), a terminal B(200) or a base station A(104), the wireless exchange station(103), the base station B(106) and the terminal B(200) will be switched into communication mode. Then, if program command consisting of bits is inputted in accordance with the agreement through the key pad part of the remote control system(101,105) in the communication mode, this command will be transmitted in DTMF tone. The command is composed of the code to order the correction of the data stored in the unvolatile memory of the terminal, the address of the unvolatile memory to be corrected, data to be corrected, the length indicating the bit of the data field and LRC to reconfirm the precision of contents of the command.

Description

Remote programming method of mobile communication system terminal using DTMF tone

1 is a schematic diagram of a remote programming system for applying the present invention.

2 is a block diagram of a terminal B of FIG. 1 for applying the present invention.

3 is a configuration diagram of a programming command.

4 is a flowchart illustrating a process of modifying data stored in a nonvolatile memory of a terminal.

5 is a detailed flowchart of step 409 of FIG.

* Description of the symbols for the main parts of the drawings *

101: landline telephone A, 102: landline switching center

103: radio switching station 104: base station

A, 105: mobile communication system terminal A, 106: base station

B, 200: mobile communication system terminal B, 201: reception filter unit

202: receiver 203: audio / logic controller

204: Microprocessor

205: E ² PROM 206: Memory

207: program ROM 208: liquid crystal display

209 Speaker 210 Microphone

211: frequency synthesizer 212: transmitter

213: transmission filter unit 214: keypad

215: DTMF tone decoder 216: base station

217: DTMF tone generator.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote programming method of a mobile communication system terminal. Particularly, when a command is transmitted to a subscriber station using a dual tone multi frequency (DTMF) tone from a remote control device, the subscriber station receives the command and decrypts the nonvolatile command. The present invention relates to a remote programming method of a mobile communication system terminal using a DTMF tone that modifies data stored in a memory.

In general, a terminal of the mobile communication system (hereinafter, abbreviated as 'terminal') is provided with a programmable nonvolatile memory storing various data. The data stored in the nonvolatile memory is divided into data (user data) which can be directly modified by the user of the terminal, and data (factory data) which can only be modified by the seller or the manufacturer.

However, due to the high functionality of the terminal, it is often not practical for the user to directly modify the user data of his terminal to effectively use various functions of the terminal. In addition, it may be desirable to modify the factory data according to the changing situation as a manufacturer or a seller.

In such a case, there are two conventional techniques for modifying the user data or factory data. First, it is a method of directly accessing the terminal. That is, when modifying data (various parameters, etc.) stored in the nonvolatile memory of the terminal, the data is modified by using a keypad of the terminal or connecting a controller such as a PC to the terminal.

Second, a method of remote programming a terminal using a modem. That is, the remote controller is equipped with a modem in the terminal and a remote controller equipped with a modem (PC can be used), and then a suitable protocol is configured to enable communication between the remote controller and the terminal so that the remote controller is connected to the terminal. It is a way to control and program directly.

However, the direct access method of the terminal has a disadvantage that it is difficult to modify the factory data in a short time because the service provider has to visit the terminal user and program the program directly in order to modify the data. On the other hand, the terminal remote programming method using the modem has the advantage that the service cost is reduced and the terminal control is easy compared to the direct terminal access method, but a complex computer that must be equipped with a modem and the remote control device also has a modem installed There is a disadvantage in that the device must be configured, and there is a problem in that the price of the terminal increases because a modem must be mounted in the terminal.

Therefore, there is a demand for a method of modifying data stored in a nonvolatile memory of the terminal by using a remote control device while avoiding a price increase of the terminal.

The present invention has been made in accordance with such a necessity, and can easily perform remote programming by utilizing an existing wired telephone or mobile communication system terminal as a control device and transmitting a command for data modification from the control device to the terminal as DTMF tones. An object of the present invention is to provide a remote programming method of a mobile communication system terminal using DTMF tones.

A feature of the present invention for achieving the above object is a mobile communication system comprising a remote control device having a DTMF tone generator and a terminal having a DTMF tone decoder, wherein the remote control device is stored in a nonvolatile memory of the terminal. A first step of sending a command in DTMF tones to modify the stored data, and a second step of modifying the data in the nonvolatile memory after the terminal receives and decrypts the issued command; The command is a code for instructing modification of data stored in the nonvolatile memory of the terminal, the address of the nonvolatile memory to be modified, the length indicating the data to be modified, the number of bytes of the data field, and the LRC for reconfirming the accuracy of the command contents. It is provided with.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 is a schematic diagram of a remote programming system for applying the present invention. 2 is a configuration diagram of the terminal B 200 of FIG. 1 for applying the present invention, and FIG. 3 is a configuration diagram of a programming command. 4 is a flowchart illustrating a process of modifying data stored in a nonvolatile memory of the terminal, and FIG. 5 is a detailed flowchart of step 409 of FIG.

The system for applying the present invention includes a remote control device 101, 105 capable of inputting and transmitting a programming command as shown in FIG. And it consists of a terminal 200 that can be decrypted. In detail, a wire telephone 101 or a terminal (terminal A 105 in the drawing) may be used as the remote control apparatus. This is because DTMF tones can be sent by entering digits through the keypad. As the command transmission system, an existing wired public telephone network (wired telephone 101, a wired switching center 102, a wireless switching center 103 and a base station B 106) or a mobile communication system (terminal A 105, base station A ( 104), the radio switching center 103 and the base station B 106 may be used. Finally, the terminal (terminal B 200) to be subjected to data modification needs to have a DTMF tone decoder capable of decoding DTMF tones in addition to the configuration of the existing terminal. A detailed description will be given with reference to FIG. 2 of the accompanying drawings. 2 is a schematic diagram of the terminal B 200 of FIG. 1 for applying the present invention, in addition to the general components, DTMF tones to be transmitted to the remote control apparatus 101 and 105 in order to confirm the accuracy of the DTMF tone decoder 215 and programming commands. A DTMF tone generator [encoder 217] for generating (check tone) is provided.

In such a terminal, an outline of an operation for correcting data stored in the program ROM 207 is as follows. When a signal including a command transmitted from the remote controllers 101 and 105 is received through the antenna ANT2, the received signal is filtered by the reception filter unit 201, and then the receiving unit 202 receives the signal from the frequency synthesizing unit 211. After receiving a predetermined frequency, demodulating the received signal of the reception filter unit 201 to extract the DTMF tone and output the DTMF tone to the audio / logical controller 203, the audio / logical controller 203 converts the DTMF tone into a DTMF tone decoder ( 215). The DTMF tone decoder 215 decodes an applied DTMF tone and converts it to a corresponding digit (digit; 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, *, #) and then microprocessor. Output to (204). The microprocessor 204 receives the output digits and processes them according to a predetermined order. Hereinafter, the structure of the programming command transmitted from the remote controllers 101 and 105 to the DTMF tone and the processing process in the terminal 200 will be described in detail.

First, when the remote controller (wired telephone 101 or terminal A 105 calls a terminal (terminal B 200) to send a programming command, the wired switching center 102, the wireless switching center 103, and the base station B 106 ), A path of a terminal B 200 or a path of a base station A 104, a wireless switching center 103, a base station B 106, a terminal B 200, and a terminal 200 in a call mode. In the call mode, when a program command composed of digits is input according to a predetermined protocol through the keypads of the remote controllers 101 and 105, the command is transmitted in DTMF tones, and the command is transmitted to the non-volatile terminal 200. Code indicating modification of data stored in memory, address of nonvolatile memory to modify, length to indicate data to modify, number of bytes of data field, longitudinal redundancy check (LRC) to reconfirm the accuracy of command contents By phrase An example of the configuration of such a command is shown in Fig. 3. The code is composed of 1 byte and the address of the nonvolatile memory is 0 or 2 bytes, respectively. The length may be absent or may consist of 1 byte depending on the content of the code LRC is to be added for parity check Commands constructed in this way are sent in DTMF tones from the remote control 101,105 The process of receiving, decrypting, and then processing the information in the terminal 200 has been described above. Hereinafter, the process of the terminal 200 receiving and processing the program command will be described with reference to FIG.

In order to control (data correction) the terminal B 200 of FIG. 1, the terminal B 200 is called using the wired telephone 101 or the terminal A 105. FIG. In this case, when calling from the landline telephone 101, the base station B 106 transmits a message for calling the terminal B 200 via the wireline switching station 102 and the wireless switching station 103 connected to the landline telephone 101. . When the terminal B 200 receiving the call message transmits a call response message to the base station B 106, a call path is established and a call state capable of a voice call is entered. On the other hand, when controlling the terminal B 200 using the terminal A 105, except that the base station B 106 transmits a call message to the terminal B via the base station A 104 and the radio switching station 103. Is the same as the case where the call to the landline telephone (101).

As described above, when the call path is established and enters the call state (step 401), the microprocessor 204 clears a predetermined area (buffer) of the memory 206 for temporarily storing the received program command (step 402). ), The counter for counting the received program command (consisting of digits) is reset (step 403). After performing step 403, the microprocessor 204 checks whether the current call state is good (step 404). If the call state is not good, it is difficult to receive the program command correctly. If the call state is good in step 404 and the user does not input the end key, the microprocessor 204 checks whether the DTMF tone is detected through the receiver 202 (step 405). When the DTMF tones are detected in step 405, the DTMF tones are applied to the DTMF tone decoder 215 through the audio / logic controller 203, and are converted to the corresponding digits in the DTMF tone decoder 215 and output to the microprocessor 204. The microprocessor 204 then stores the digit in a buffer (step 406). After performing step 406, the microprocessor 204 increments the count of the digit counter by one (step 407) and confirms that the number of digits stored in the buffer has reached the number of digits accessible to the nonvolatile memory (step 408). . In step 408, if the number of accessible digits is reached (a command is configured), the code of the received command is a modification command of nonvolatile memory (step 409). If the memory modification command is performed, the data stored in the buffer is stored in the designated address of the memory. The data is written to modify the data (step 410). After performing step 410, the microprocessor 204 instructs the DTMF tone generator 217 to generate a confirmation tone, and the confirmation tone generated by the DTMF tone generator 217 is an audio / logical controller 203 and a transmitter 212. Is transmitted to the remote control apparatuses 101 and 105 via the transmission filter unit 213 (step 411). The process then returns to step 402. On the other hand, when the call state is bad in step 404 or when the user inputs the end key, the call state ends (step 412). If a DTMF tone is not detected in step 405, if a command capable of accessing the nonvolatile memory is not configured in step 408, and if it is not a data modification command in step 409, the step returns to step 402. do. However, there is a need to confirm whether the terminal 200 reliably received the command transmitted from the remote controllers 101 and 105. Therefore, step 409 needs to be further subdivided. A description with reference to FIG. 5 is as follows.

After step 408 of FIG. 4, it is checked whether the code of the command stored in the buffer is a command to modify the data of the nonvolatile memory (step 501). If the data modification command is performed, it is checked whether the address of the nonvolatile memory to modify the data is valid (step 502). ). If the address of the memory is valid in step 502, it is determined whether the LRC is correct (step 503). If the LRC is correct, it is determined whether the length of the data is correct (step 504). If the length of the data is correct in step 504, processing proceeds to step 401. However, if the condition is not satisfied in the above steps 501 to 504, the received command is not valid (that is, invalid), and the flow advances to step 402 to attempt to receive again.

According to the present invention, since a terminal of a wired telephone or a mobile communication system can be used as a remote control device, remote programming is possible without using a complicated computer system equipped with a modem. In addition, since the terminal only needs to have a DTMF tone decoder and a DTMF tone generator, the cost is lower than that of a modem. Therefore, when it is necessary to modify the data stored in the nonvolatile memory of the terminal, it is possible to easily remotely program the subscriber terminal in a service center. In particular, it is very useful for relatively simple data modification.

Claims (3)

A mobile communication system comprising a remote control having a DTMF tone generator and a terminal having a DTMF tone decoder, wherein the remote control sends a command in DTMF tones to modify data stored in a nonvolatile memory of the terminal. A first process and a second process of modifying data in the nonvolatile memory after the terminal receives and decrypts the transmitted command; The command is a code for instructing modification of data stored in the nonvolatile memory of the terminal, the address of the nonvolatile memory to be modified, the length indicating the data to be modified, the number of bytes of the data field, and the LRC for reconfirming the accuracy of the command contents. Remote programming method of a mobile communication system terminal using a DTMF tone, characterized in that it comprises a. The method of claim 1, wherein the second process comprises: a first step of entering a call mode; a second step of clearing a buffer after the first step; a third step of resetting a counter after the second step; A fourth step of determining whether the call state is good after the third step; a fifth step of checking whether the DTMF tone is detected if the call state is good in the fourth step; and after the fifth step, converting the DTMF signal into a corresponding digit. A sixth step of converting and storing the digit in the buffer after the sixth step; a seventh step of increasing the count of the counter by one digit after storing the digit in the buffer; and a number of digits stored in the buffer after the seventh step An eighth step of determining whether it corresponds to a range accessible to a volatile memory; and if the range corresponds to an accessible range in the eighth step, the digits indicate modification of data in the memory. A ninth step of checking whether a code is included; a tenth step of modifying data of a designated address if a code indicating modification of data in the memory is included in the ninth step; and generating a confirmation tone after the tenth step In the eleventh step of sending out to the control apparatus and returning to the second step, the twelfth step of terminating the call if the call state is poor or the user inputs the call termination key in the fourth step, and in the fifth step A 13th step of returning to the second step if a DTMF tone is not detected; a 14th step of returning to the second step if the range is not accessible in the eighth step; and a code of the ninth step And a fifteenth step of returning to the second step if it is not already performed. The method as claimed in claim 2, wherein the ninth step includes a first step of checking whether the code indicates modification of data in the memory, and if the memory modification instruction code is valid in the first step, is the address of the memory to modify data valid? A second step of checking, a third step of checking whether the LRC is correct if the address of the memory is valid in the second step, and a second step of checking whether the length of the data to be corrected is correct if the LRC is correct after performing the third step. If the condition is satisfied after performing the fourth step and the fourth step, the fifth step proceeds to the tenth step, and if the conditions are not satisfied in the first to fourth steps, the process becomes invalid. And a sixth step of returning. The remote programming method of a mobile communication system terminal using a DTMF tone.