KR20000032787A - Communicating method between mobile communication terminal and external device - Google Patents

Abstract

PURPOSE: A communicating method between mobile communication terminal and external device is provided to embody various additional service using an information and telecommunication by transmitting information generated in an external device to a specific region through a terminal and inquiring a message received in the terminal, bases station information and a call state information in the external device. CONSTITUTION: An external device identifies that a terminal is connected through an RS-232serial port(S2). The external device outputs a message for identifying a connection state of a terminal, and the terminal receives the message(S3). It is judged as to whether a response signal from the terminal is received within a time set by the message outputted from the external device is received(S4). It is judged as to whether the external and the terminal are connected using a communication protocol capable of a message transmission and a message receipt when the response signal from the terminal is received within a time set by the message outputted from the external device is received(S5). It is judged as to whether a message received in the external message is existed when the external and the terminal are connected using the communication protocol capable of the message transmission and the message receipt(S6). The message received from the terminal is transmitted to the external device when the message received in the external message is existed(S7).

Description

Communication method between mobile communication terminal and external device

The present invention relates to a communication method between a mobile communication terminal and an external device, and more particularly, an external device including a terminal, a computer, a laptop, and the like using an asynchronous high level data link control (HDLC) protocol, which is one of one-to-one communication. Communication method between a mobile communication terminal and an external device that connects the device to a specific area by connecting the device through the RS-232 serial port to a specific area through the terminal, or to receive messages received by the terminal from the external device. It is about.

That is, the present invention relates to a communication scheme and configuration between an external device and a terminal that can be simply received using a mobile phone network, and can transmit and receive information using a mobile communication network. The present invention relates to a communication method between a mobile communication terminal and an external device that enables a call origination or termination and a lake scene.

In general, various devices are currently used for personal communication with each other. Among them, mobile communication terminals (hereinafter, referred to as "terminals") are the most common and used because of their mobility and portability. In addition, as the society becomes more diversified and internationalized, people's activities become wider and the desire for information and communication is gradually increasing. Accordingly, the services in mobile communication require not only voice communication but also various information communication.

In the wired network, a variety of information is provided through communication through a modem, and an analog mobile communication network uses data tones for data communication. In the CDMA digital network of cellular and personal mobile communication (PCS), text service and data communication are used and information is exchanged.

In general, however, in the case of an information service, a mobile communication network can transmit and receive less than a certain amount of information between a terminal and a terminal or between a terminal and a server. The variety of information due to the transmission is limited, and in the case of receiving information, it is possible to check only on a limited terminal screen, and thus there is a limitation according to the received information.

Accordingly, the present invention was devised to solve the limitations of information transmission and reception in such a conventional terminal, and edited data by communicating with a terminal, a computer, a PDA, a notebook computer, and a special function device to provide various services. To provide a communication method between a mobile communication terminal and an external device that can transmit various data to the destination through the terminal and to process the necessary data among the data received by the terminal through an external device to implement a variety of additional functions. There is this.

More specifically, by implementing the two-way communication that transmits the information made in the external device to a specific region through the terminal, and inquires the message, base station information, and call status information received by the terminal from the external device, not only voice communication but also information communication The purpose of the present invention is to provide a communication method between a mobile communication terminal and an external device to implement various additional services.

Meanwhile, in order to achieve the above object, the present invention provides a connection between a terminal and an external device and transmitting a message for checking the status of the terminal; (B) determining whether the terminal and the external device have a communication connection within a set response time when the message transmission for checking the status of the terminal is completed in the step (a); (C) determining whether a communication is possible between the terminal and the external device because it is determined that communication is connected within the response time set in the step (b); (D) determining whether there is a message received through the terminal as it is determined that the message transmission and reception is possible as a result of the determination in step (c); (E) determining that there is a message received through the terminal as a result of the step (d) and transmitting the received message to an external device; (F) determining whether there is a message to be transmitted to the terminal as it is determined that there is no received message as a result of the step (d); As a result of the determination in the step (f), it is determined that there is a message to be transmitted.

1 is a view illustrating a communication connection state with external devices connectable to a mobile communication terminal according to the present invention.

2 is a block diagram of a mobile communication terminal according to the present invention;

3 is a block diagram of an external device for communication with a mobile communication terminal according to the present invention;

4 is a communication protocol between a mobile communication terminal and an external device according to the present invention.

5 is a configuration diagram of communication data between a mobile communication terminal and an external device according to the present invention;

6 is a flowchart illustrating a communication control method of a mobile communication terminal for message transmission in the present invention.

7 is a flowchart illustrating a communication control method of an external device for message transmission in the present invention.

8 is a diagram illustrating a text transmission data structure using communication between a mobile communication terminal and an external device according to the present invention;

<Description of the code | symbol about the principal part of drawing>

11: RF processor 12: intermediate frequency processor

13 digital signal processing unit 14 voice signal processing unit

15 electronic switch 16 bell

17: microphone 18: speaker

19: central processing unit 20: memory

21: electronic input and output port 22: display unit

23: key input unit 24: external device connection unit

100: terminal 110: interface

120: power supply device 130: peripheral device

140: microcomputer 200: external device

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In the embodiment according to the communication connection between the mobile communication terminal and the external device according to the present invention, as shown in (a) of FIG. 1, the terminal 100 and the notebook 400 can bidirectionally communicate through an RS-232 serial port. 1, the terminal 100 is connected to the external device 200 through RS-232, and the external device 200 is connected to the GPS receiver 300 for position tracking. The position received from the GPS receiver 300 may transmit information such as a position to a specific place through the terminal 100 or receive a command by the data received from the terminal 100, and in FIG. 1C. As shown, the terminal 100 is connected to the external device 200 through RS-232 and the external device 200 is connected to the meter 500, so that the meter 500 reads a meter, a bridge, a factory, or the like. Device, taxi meter, automobile meter, household gas meter and water meter It can be utilized to receive information from the meter 500 can send information to the control center through the terminal 100 and can also receive the command sent from the control center through the terminal 100.

That is, since the terminal 100 and the external device 200 are connected to each other to enable bidirectional communication, the data output from any device connected to the external device 200 is transmitted to the external device 200, the RS-232 and the terminal 100. The external data transmitted through the terminal 100 and received through the terminal 100 is received by the external device 200 through RS-232. Therefore, the GPS receiver 300 or the meter 500 is controlled by the current operation or upgraded by data or control signals input through the external device 200.

Next, a detailed configuration of a terminal 100 for implementing an information transmission / reception operation according to a communication connection between a terminal and an external device according to one embodiment will be described.

As shown in FIG. 2, the terminal 100 includes an external device connection unit 24 connected to the external device 200 through RS-232, and an electronic device for inputting / outputting signals input through the external device connection unit 24. The central processing unit (19) and the central processing unit (19) for controlling the overall operation such as signal transmission or transmission of data by the data input through the input / output port (21) and the electronic input / output port (21). Memory 20 for storing the received data information, control information, etc. according to the control signal of (19), and the RF processing unit 11 for high-frequency amplification of the frequency for the mobile phone including the information received via the antenna 30 And an intermediate frequency processing unit 12 for amplifying the high frequency amplified frequency through the RF processing unit 11 to an intermediate frequency, and the signal received by the intermediate frequency processing unit 12 is control information between a mobile phone and a system such as a lamp. If it's signal processing If the signal received from the digital signal processor 13 and the intermediate frequency processor 12 transmitted to the processing device 12 is voice information rather than control information between a mobile phone and a system such as an electric light, the electronic switch 15 It consists of a voice signal processing unit 14 for outputting to the speaker 18 through the ().

The electronic switch 15 switches signals of the bell 16, the microphone 17, the speaker 18, and the like according to the control signal of the central controller 19. In addition, the central processing unit 19 is connected to a display device 22 for transmitting information to the user in text and picture.

On the other hand, the configuration of the external device 200 is connected to the terminal 100 is connected to the external device connection unit 24 of the terminal 100 as shown in Figure 3 through the RS-232 serial interface 110 And a microcomputer 140 that controls the overall operation according to the reception and transmission of the signal and internal data input through the interface 110, and displays the received message according to the control signal of the microcomputer 140 or GPS. It consists of a peripheral device 23 for collecting to transmit the data output from the measuring instrument.

In addition, the external device 200 may have a built-in power supply device 120 to supply driving power to the microcomputer 140 and the peripheral device 130 as well as to supply power to the terminal 100.

Meanwhile, the data transmission and reception operations between the terminal and the external device having such a configuration will be described in detail as follows.

First, since the mobile communication terminal 100 and the external device 200 are connected to RS-232 serial communication, the external device 200 is set to an initial state for receiving or transmitting information through the terminal 100.

That is, when the terminal 100 and the external device 200 are connected by such hardware, the signal corresponding thereto is detected by the microcomputer 140. The microcomputer 140 then outputs confirmation message data, which is centrally processed by the terminal 100 through the interface 110, RS-232, the external device connection unit 24, and the electronic input / output pod 21. Input to device 19. At this time, the CPU 19 transmits the corresponding response signal to the microcomputer 140 of the external device 200 in response to the confirmation message data input within the predetermined time. Then, the microcomputer 140 establishes a communication connection state according to a response signal currently input, and continuously determines whether the terminal 100 is out of a call range, an idle state, or a call state based on information provided from the terminal 100. do.

In this case, when the terminal 100 determines that the message can be transmitted and received, the microcomputer 100 transmits a message currently received through the terminal 100 to the external device 200, and also from the external device 200. If there is data to be signaled and transmitted through the terminal 100.

Here, the protocol for communication between the terminal 100 and the external device 200 is as shown in Figure 4 physical layer (L-1), relay layer (L-2), transport layer (L-3) And an application layer (L-4), the physical layer (L-1) means a physical connection layer between the terminal 100 and the external device 200, and performs serial communication RS-232 communication.

The relay layer (L-2) is a layer that transmits data between the terminal 100 and the external device 200. In this layer, data from the physical layer (L-1) is received to check the beginning and the end, and data errors occur. Check whether or not. At this time, if there is no error as a result of checking in this physical layer (L-1), it is sent to the transport layer (L-3). In this case, when receiving a message from the transport layer (L-3), a CRC code is created, and a flag indicating the beginning and end of the message is sent to the physical layer (L-1).

The transport layer (L-3) is composed of an instruction part and a data part. This command defines the operation between the terminal 100 and the external device 200. In addition, the transport layer (L-3) divides the message received from the relay layer (L-2) into instructions and data parts, and sends it to the application layer (L-4). In this case, when a message is received from the application layer (L-4), a command and data are configured and sent to the relay layer (L-3).

The application layer L-4 provides an application service using data from the transport layer L-3 of the application layer L-4 of the external device 200. That is, in connection with the application service generated in the external device 200, data is configured at the application layer L-4 and sent to the transport layer L-3. Then, the application layer L-4 of the terminal 100 is reconfigured as an air protocol of mobile communication using data from the transformer layer L-3, and communicates using a mobile communication network. . In addition, the terminal 100 reconfigures the air protocol of the mobile communication in a data format according to a command required by the transport layer L-3 and sends it to the transport layer L-3.

Here, referring to the data configuration for communication between the terminal 100 and the external device 200, as shown in FIG. 5, a start flag for first sending data, a data packet as transmission data, and cyclic redundancy codes for error correction are shown. ) And the end flag. The data packet is composed of a command and data, and according to the command, the terminal may receive information transmission / inquiry, call origination / reception / end, call state, information transmission state, and base station information.

Control method through the mobile communication terminal in the communication method according to the configuration of the protocol and communication data between the terminal and the external device as shown in Figure 6 to receive information or the information corresponding to the terminal and the external device as shown in FIG. Initial state (S21) for proceeds to the hardware connection step (S22). Then, in this hardware connection step (S22), the external device checks the hardware connection through the RS-232 serial port in the external device and proceeds to the communication initialization step (S23). In this communication initialization step (S23), as the external device outputs data for checking the connection state, the initialization data is received within the set time and the message reception determination step (S24) proceeds. Therefore, if it is determined in the message reception determination step S24 that the request message is received from the external device, the procedure goes to the protocol determination step S25. As a result of the determination in the protocol determination step (S25), it is determined whether the communication protocol connected to the external device is correct, and the flow proceeds to the transmission request message determination step (S26).

Therefore, if it is determined in the transmission request message determination step (S26) that it is determined that there is a text message transmission request to the external device, the process proceeds to the text message transmission step (S27) and transmits the corresponding text message to the external device and sends a response message. In step S28, a response message is transmitted to the external device, and the process returns to the communication initialization step S23 to repeat the loop.

If it is determined in the protocol determination step (S25) that the communication protocol connected to the external device is determined to be different, the procedure proceeds to the neck message transmission step (S29), and transmits a negative tone response message for the received protocol to the external device. The loop returns to the initialization step S23. If it is determined in the transmission request message determination step (S26) that there is no text message transmission request to the external device, the process proceeds to the response message transmission step (S28).

On the other hand, according to the configuration of the protocol and communication data between the terminal and the external device

In the communication method, a method for communication in an external device is shown in FIG. 7. The initial state (S1) for the external device and the terminal to receive information or information corresponding to its own terminal is a hardware connection step (S2). Proceed to). Then, in this hardware connection step (S2), the external device checks the hardware connection through the RS-232 serial port in the external device and proceeds to the communication initialization step (S3). Therefore, in this communication initialization step (S3), as the external device first outputs a message for checking the connection state of the terminal, the terminal receives the message and proceeds to the communication connection determination step (S4). Therefore, when it is determined in the communication connection determination step (S4) that the response signal from the terminal is received within the time set by the message output from the external device, the process proceeds to the message communication determination step (S5).

On the other hand, if it is determined in the communication connection determination step (S4) that the response signal is not received by the external device within the set time in the terminal proceeds to the transmission count count determination step (S10). Therefore, if it is determined in the transmission count count determining step (S10) that the current transmission count is determined to be less than or equal to the set number of times, the process proceeds to the confirmation message transmission step (S3) and repeats the loop. In addition, if it is determined in the transmission count count determining step (S10) that the current transmission count exceeds the set number of times, it proceeds to the communication disconnection notification step (S11) to inform that communication between the terminal and the external device is lost.

If it is determined in the message communication possible determination step (S5) that the external device and the terminal are determined to be connected by a communication protocol capable of transmitting and receiving messages, the procedure proceeds to the reception message determination step (S6). Then, when it is determined in the reception message determination step (S6) that the message received by the terminal is determined that there is a message received from the external device, the process proceeds to the first message transmission step (S7). Therefore, in the first message transmission step S7, the message received from the terminal is transmitted to the external device and the main loop ends.

When it is determined in the received message determining step (S6) that there is no message received from the outside to the terminal and there is no message to be transmitted to the external device, the flow proceeds to the sending message determining step (S8). Therefore, if it is determined in the transmission message determining step (S8) that there is a message to be transmitted through the terminal from the external device proceeds to the second message transmission step (S9). In the second message transmission step (S9), the external device transmits a message through the terminal and terminates the present loop.

Herein, the data transmission method in the first message transmission step S7 and the second message transmission step S9 will be described in more detail based on the text transmission data structure of FIG. 8.

That is, when the message received by the terminal 100 in the first message transmission step S7 is transmitted to the external device 200, the command, newly received message or read message is sequentially displayed as shown in FIG. Sets the teleservice, the type and message characteristics. And after setting the number of the sender sends to the terminal (100). Accordingly, the terminal 100 sets a command, a remaining message, a teleservice identifier, a message category, and a message identifier in response to the received data, and finally sends a message to the external device 200.

When the external device 200 in the second message transmission step S9 transmits information to a specific destination through the terminal 100, the external device 200 is sequentially displayed as shown in FIG. The command setting, the teleservice, the message category and the message identifier are set, and finally, the message, which is the transmission information to the destination, is transmitted to the terminal 100. Then, the terminal 100 transmits the information, which is the final message, and transmits the result of the transmission success or failure to the external device 200 in the order of the command, the response code, and the code of the error cause.

As described above, according to the present invention, the terminal and the external device are connected by the asynchronous HDLC protocol protocol consisting of a physical layer, a relay layer, a transport layer, and an application layer, thereby transmitting information made in the external device to a specific region through the terminal. In addition, by implementing two-way communication in which the terminal receives the message, the base station information, and the call state information from the external device, it is possible to implement various additional services using not only voice communication but also information communication.

Claims (3)

(A) transmitting a message for checking a connection state of the terminal from the external device when the terminal and the external device are connected by RS-232; In step (a), when the transmission of the message for checking the connection status from the external device is completed, determining whether the terminal is connected to the communication within the set response time by the external device; (C) determining whether the terminal is in a protocol state capable of transmitting and receiving a message between the terminal and the external device because it is determined that the terminal is in communication within the set response time in step (b); (D) determining whether there is a message received by the terminal from the external device or a message to be transmitted through the terminal from the external device when it is determined that the protocol state allows message transmission and reception as a result of the step (c); (E) transmitting the message received to the terminal to the external device or transmitting the message through the terminal as it is determined that there is a message received by the terminal or that there is a message to be transmitted from the external device. Communication method between the terminal and the external device, characterized in that. According to claim 1, In the case of transmitting the message received by the terminal to the external device in step (e), first set the command, the newly received message or the teleservice and the sender number which is the message type and message characteristics from the external device In response to the received data, the terminal sets a command, a remaining message, a teleservice identifier, a message category, and a message identifier in response to the received data, and finally sends a message to the external device. Way. The method of claim 1, wherein in the step (e), when the external device transmits information to a specific destination through a terminal, the external device first sets a command setting, a teleservice, a message category, a message identifier, and finally a destination. When a message is transmitted to the terminal, the terminal sends the final message and transmits the result of the success or failure of the message to the external device in order of command, response code, and error code. Communication method between terminal and external device.