KR20100081802A - Data transfer method of portable device and system thereof - Google Patents

Abstract

PURPOSE: A data transmitting method of a mobile terminal and a system thereof are provided to easily manage and move the data stored in a mobile terminal. CONSTITUTION: An external device(200) forms the communication channel with a mobile terminal, and requests PIM(Personal Information Management) information stored in a mobile terminal. A mobile terminal(100) stores PIM information, and packetize the PIM information along MTP(Media Transfer Protocol) according to a request from an external device in order to transmit it to the external device.

Description

Data transfer method of portable device and system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable terminal, and more particularly, to a data transmission method and system for a portable terminal, which can make the use of the portable terminal more convenient by supporting transmission of data stored in the portable terminal based on a predetermined protocol.

Portable terminals are one of electronic products that are developing at a very high speed thanks to functions such as ease of carrying and convenience of movement. Recently released portable terminals are not only portable and mobile, but also various options for storing and playing back information desired by the terminal user, such as MP3, DMB, moving picture playback, and camera functions. It is expanding without more.

Such a mobile terminal is connected to a personal computer (PC) to perform various data transmissions for supporting the above-described optional functions. In particular, the portable terminal may download an image file or a music file through a PC and store the image file in a storage unit. On the contrary, the portable terminal may transmit an image file or a music file stored in the storage unit. However, conventional data transmission between the mobile terminal and the PC had to be performed by entering a specific mode for each data stored in the mobile terminal. Accordingly, there is an inconvenience of frequent mode change for managing and operating various data of the portable terminal.

Accordingly, an object of the present invention is to provide a data transmission method and system for a portable terminal that can easily and easily transmit and receive various data stored in the portable terminal.

According to an aspect of the present invention, there is provided a data transmission method of a mobile terminal, the method including: forming a communication channel between the mobile terminal and an external device; Requesting, by the external device, personal information management (PIM) information from the portable terminal; Packetizing, by the portable terminal, the PIM information according to a Media Transfer Protocol (MTP) standard; And transmitting, by the portable terminal, a packet corresponding to the PIM information to the external device.

A data transmission system of a portable terminal according to an embodiment of the present invention for achieving the above object, an external communication channel for establishing a communication channel with the portable terminal, and requests for personal information management (PIM) information stored in the portable terminal Device; And the portable terminal for storing the PIM information and packetizing the PIM information according to the MTP (Media Transfer Protocol) standard according to the request of the external device and transmitting the packetized information to the external device.

According to the data transmission method and system of a mobile terminal according to an embodiment of the present invention, the present invention supports data transmission by transmitting various data based on a protocol set after setting a specific protocol without changing the protocol required for communication with a PC. It is easy to move and manage the data stored in the portable terminal accordingly.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, only parts necessary for understanding the operation according to the embodiment of the present invention will be described, and the description of other parts will be omitted so as not to disturb the gist of the present invention.

The terms or words used in the specification and claims described below should not be construed as being limited to the ordinary or dictionary meanings, and the inventors are appropriate to the concept of terms in order to explain their invention in the best way. It should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a view schematically showing the configuration of a data transmission system of a mobile terminal according to an embodiment of the present invention.

Referring to FIG. 1, the data transmission system of the present invention includes a PC 200 and a portable terminal 100.

In the data transmission system of the present invention having such a configuration, the PC 200 and the portable terminal 100 are connected by using a cable, in particular, a USB cable, and the MTP (Media Transfer Protocol) is connected between the PC 200 and the portable terminal 100. After supporting to establish a communication channel based on the PIM (Personal Information Management) information including the phonebook data, email, messages, etc. of the data stored in the mobile terminal 100 can be transmitted to the PC 200 based on the MTP To help. Accordingly, the data transmission system of the present invention supports the transmission of various data based on one protocol regardless of the type of data between the PC 200 and the mobile terminal 100, thereby eliminating unnecessary mode changes. The transfer can be performed.

The PC 200 has a configuration including a monitor, a keyboard, a mouse, and a main body. The PC 200 uses a keyboard and a mouse as input devices, and uses a monitor as an output device. Accordingly, the PC 200 supports a quick data input and data change task using a keyboard and a mouse, and reads and searches a user's fast data using a monitor that provides an appropriate size screen. To make it possible. The main body may include a port to which other peripheral devices such as a speaker or an electronic device including the portable terminal 100 are connected. In the present invention, the PC 200 may transmit data to the mobile terminal 100 or receive data transmitted from the mobile terminal 100 using the first USB port provided in the main body. The main body may further include various ports such as a UART port, a card slot, and the like. In particular, the PC 200 of the present invention stores an application program, for example, SyncML Server, which is connected to the mobile terminal 100 to transmit and receive data, and is loaded under a user's control and loaded in the memory. 100) Can support operations. In practice, the user establishes a communication channel with the portable terminal 100 through the USB port by using an application of the SyncML Server of the PC 200, for example, the Sync Manager, and uses the user interface provided by the Sync Manager. Data transmission with the terminal 100 can be controlled. Meanwhile, various image files and music files may be stored in the memory of the PC 200. The image file and the music file may be files transmitted from the mobile terminal 100. In addition, PIM information received from the portable terminal 100 may be stored in the PC 200 memory.

When the mobile terminal 100 supports a mobile communication service, the portable terminal 100 may include a radio frequency unit, and provides a communication service capable of transmitting voice or data while moving. The portable terminal stores an image file or a music file in a storage unit so that a user can support listening to music or searching for an image while moving. The portable terminal stores phonebook data for supporting a call service and PIM information such as an email or a message received through the radio frequency unit. When the portable terminal is connected to the PC 200, the mobile terminal may transmit the PIM information to the PC 200 based on MTP, and receive the PIM information from the PC 200.

The portable terminal 100 and the PC 200 may transmit and receive image files and music files based on MTP, and similarly may transmit and receive PIM information. Accordingly, the PC 200 and the mobile terminal 100 may transmit and receive data based on the MTP protocol in the process of transmitting and receiving image files, music files, and PIM information, without performing a separate mode change. .

2 is a view for explaining the formation of a layer for data transmission in the data transmission system of the present invention.

Referring to FIG. 2, the PC 200 may include a first USB port 201, which is a physical layer, a first MTP layer 203, a first MTP layer, which is a protocol layer on the first USB port 201. It may have a structure of the SyncML Server layer 205 and the first file layer 207 which are application layers placed on the 203. In addition, the mobile terminal 100 is formed on the second MTP layer 103 and the second MTP layer 103 formed as protocol layers on the second USB port 101 and the second USB port 101 which are physical layers. It may have a structure of the application layer SyncML Client 105 and the second file layer 107. Here, the first USB port 201 and the second USB port 101 are physical layers of the corresponding devices, respectively, and are layers designed in hardware. The first MTP layer 203 and the second MTP layer 103 are protocol layers, and the SyncML Server layer 205 and SyncML Client layer 105, the first file layer 207, and the second file layer 107 are provided. ) Is a software layer in which an image, an MP3 file, or the like exists. The protocol layer and the software layer are stored in the memory of the PC 200 and the storage unit of the portable terminal 100, respectively, and are activated according to a user's request to operate the protocol layer and the software layer in the order of the above-described layers. do.

For example, when a user of a portable terminal wants to transmit PIM information or a file stored in the portable terminal 100 to the PC 200 or transmits data stored in the PC 200 to the portable terminal, The second USB port 101 of the mobile terminal 100 and the first USB port 201 of the PC 200 may be connected by a cable. In addition, the user operates the PC 200 to control the SyncML Server application program, for example, to activate the Sync Manager. Then, the PC 200 may determine whether there is a mobile terminal 100 connected to the first USB port 201 while activating the SyncML Server application program. At this time, if the portable terminal 100 is connected to the first USB port 201, the PC 200 transmits a control signal through the first USB port 201. The control signal is transmitted to the second USB port 101 of the mobile terminal 100, and the control unit of the mobile terminal 100 controls to activate the SyncML Client application program stored in the storage unit according to the control signal. In this case, the PC 200 and the mobile terminal 100 control to form the first MTP layer 203 and the second MTP layer 103, respectively, in order to define a standard for signal transmission. Accordingly, when a user generates an input signal through a keyboard or a mouse to control the PC 200, the input signal is transmitted to a cable via the first MTP layer 203 and the first USB port 201. . When the portable terminal 100 receives a signal transmitted from the PC 200 from the second USB port 101 to which the cable is connected, the portable terminal 100 transmits the signal to the controller of the portable terminal. The controller of the portable terminal may control to activate the MTP and SyncML Client stored in the storage unit according to the signal transmitted from the PC 200 to form the second MTP layer 103 and the SyncML Client layer 105, respectively.

When this layer formation is completed, the PC 200 performs a process of converting an input signal or a selected data signal generated based on a SyncML Server application according to the MTP standard according to a user's request, and then transmitting it to the mobile terminal 100. do. The mobile terminal 100 may receive data received from the PC 200 according to the MTP standard and store the data in the storage unit or output the display unit based on the SyncML Client application program.

Meanwhile, in order to transmit data from the portable terminal 100 to the PC 200, a data transmission request is received from the PC 200. In more detail, the user may be provided with a screen for controlling the mobile terminal 100 using the Sync Manager activated on the PC 200. Accordingly, the user may perform a data transmission request to the mobile terminal 100 using the Sync Manager. When the user requests a data transmission stored in the mobile terminal 100, the PC 200 generates a control signal according to the user, and the mobile terminal 100 generates the control signal through the first MTP layer 203 and the first USB port 201. To be sent). The mobile terminal 100 transmits a control signal received through the second USB port 101 and the second MTP layer 103 to the SyncML Client layer 105, and the SyncML Client stores data stored in the storage unit according to the control signal. May be controlled to be transmitted to the PC 200 through the second MTP layer 103 and the second USB port 101. At this time, when there is a request for transmission of an image file or a music file in the second file layer 107, the SyncML client uses the second MTP layer 103 and the second USB port 101 to transmit information to the PC 200. You can also send. When the data transmission request is a PIM information request, the SyncML client converts the selected data, for example, phonebook data, message data, or email data, to meet the MTP standard, and converts the converted data. The second USB port 101 transmits the data to the PC 200. The PC 200 decodes the data received through the first USB port 201 in the first MTP layer 203 and transfers it to the SyncML Server. The SyncML Server can control the output of the received data to the Sync Manager, and store the data in the memory under the control of the user, or support the data change according to the input signal.

Here, the PIM information transmission procedure stored in the mobile terminal 100 will be described in more detail with reference to FIG. 3.

3 is a diagram illustrating a signal flow for explaining PIM information transmission according to an embodiment of the present invention.

Referring to FIG. 3, in step S102, a user physically connects a USB port provided in each of the portable terminal 100 and the PC 200 using a cable, in particular, a USB cable. The user controls the PC 200 to activate an application program that can operate the SyncML server, for example, Sync Manager. Subsequently, when the user requests to connect to the mobile terminal using the activated Sync Manager in step S104, the PC 200 performs MTP setting for data transmission and reception with the mobile terminal 100. In this case, the PC 200 may load the MTP stored in the memory and transmit a control signal for requesting the MTP setting to the mobile terminal 100.

When the mobile terminal 100 receives the control signal for requesting the MTP setting from the PC 200 in step S105, the portable terminal 100 may perform the MTP setting while activating the SyncML Client stored in the storage unit. Subsequently, when the PC 200 receives a data transmission request, in particular, a PIM information transmission request under the control of the user in step S106, an information request message regarding the data property is transmitted to the mobile terminal 100 in step S107, that is, "get properties". Send.

When the mobile terminal 100 receives "get properties" from the PC 200, the mobile terminal 100 sets attribute information corresponding to the attribute of data to be transmitted to the PC 200 in step S109, for example, MIME (Multipurpose Internet Mail Extensions). Can be written as a type and sent. Here, the present invention is not limited to the MIME type, and the present invention may be applied with various types set to MTP according to the designer's intention.

On the other hand, when the PC 200 receives a specific type of attribute information message from the portable terminal 100, the PC 200 transmits a request for actual data transmission, that is, a "get object" to the portable terminal 100 in step S113. When the mobile terminal 100 receives the "get object" from the PC 200, the mobile terminal 100 detects the corresponding PIM information stored in the storage unit, converts the PIM information into a SyncML packet in order to transmit the PIM information based on the MTP, and then, the PC Transmit to 200. When the PC 200 receives the SyncML packet from the mobile terminal 100, the PC 200 decodes the MML packet and transmits the same to the SyncML Server, and the SyncML Server may control to output the PIM information corresponding to the decoded data to the display unit.

As described above, the data transmission according to the embodiment of the present invention requests the attribute information of the PIM information in order to request the PIM information of the mobile terminal connected to the PC 200, and the mobile terminal transmits the PIM information. For example, the attribute information is created and transmitted using the MIME type. The PC 200 may control the mobile terminal 100 to receive the SyncML packet transmitted based on the MTP, decode it, and output the same to the screen. Accordingly, the data transmission of the present invention supports transmitting PIM information based on MTP without changing a mode.

4 is a flowchart illustrating a data transmission method according to an exemplary embodiment of the present invention in the portable terminal side.

Referring to FIG. 4, in the data transmission method of the present invention, first, the portable terminal receives power from the power supply unit in step S101 to complete booting, outputs a standby screen according to a user selection, or maintains a sleep state. Can be. Thereafter, the portable terminal checks whether the PC is connected in step S102. That is, the mobile terminal checks whether a cable is connected to the USB port. This cable connection process is a physical process, which can be understood as a process of inserting a connector of a cable into a USB port of a mobile terminal. If there is no cable connection in step S102, the mobile terminal branches to step S103 to support the mobile terminal function according to the user input, for example, call service function, message service function, search function, camera function, etc. have.

On the other hand, when the cable connection is completed in step S102, the portable terminal may perform the MTP setting in step S105 according to the PC request. To this end, the mobile terminal 100 may receive a control signal for requesting the MTP setting from the PC. Substantially, when the portable terminal 100 is connected to a PC, the user controls the data transmission of the portable terminal using the PC. Accordingly, when the user generates an input signal for activating a SyncML Server application stored in the PC, for example, Sync Manager, the PC activates the application. If the user selects Sync to be connected to the mobile terminal using the Sync Manager, the PC can transmit a control signal for sync connection to the mobile terminal through the connected cable. When the mobile terminal receives the control signal for the Sync connection from the PC, the mobile terminal may activate the SyncML Client stored in the storage unit and control to set the MTP layer which is a protocol layer.

Thereafter, the mobile terminal checks whether a property information request for PIM information has been received from the PC in step S107. If there is no separate request for information, the mobile terminal may branch to step S105 to control the MTP to remain set.

On the other hand, when receiving a signal for the attribute information request for the PIM information in step S107, the mobile terminal branches to step S109 to create a property (Properties) information for the PIM information, it can be controlled to transmit to the PC. In this case, the portable terminal may define the attribute information on the PIM information as a preset type, for example, a MIME type, and control it to be transmitted to the PC.

When the mobile terminal receives a signal corresponding to the PIM information transmission request from the PC in step S113, the mobile terminal may transmit the PIM information to the PC based on the MTP in step S115. At this time, the mobile terminal converts the PIM information into SyncML packets that can be transmitted based on the MTP, and then transfers the PIM information to the PC based on the MTP.

5 is a diagram schematically illustrating a configuration of a portable terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 5, the portable terminal 100 of the present invention includes the input unit 110, the audio processor 120, the display unit 130, the interface unit 140, the storage unit 150, and the controller 160. It may include.

The portable terminal 100 of the present invention having such a configuration performs a process of changing the PIM information into a SyncML packet that can be applied in the MTP in order to transmit and receive the PIM information with the PC connected through the interface unit 140 on an MTP basis. After that, control to transmit and receive data based on MTP. Hereinafter, each configuration will be described in more detail.

The input unit 110 includes a plurality of input keys and function keys for receiving numeric or text information from a user and setting various functions. The function keys may include a direction key, a side key, and an accelerator key set for performing a specific function. The input unit 110 generates various input signals, for example, an input signal corresponding to reading data stored in a corresponding communication device when a communication device is connected according to a request of an external device connected to the interface unit 140 and a user. The control unit 160 may transmit the information. In particular, the input unit 110 of the present invention may have a locked state when the PC operates the Sync Manager after the PC is connected to the interface unit 140. That is, the input unit 110 may be controlled not to generate a separate input signal even if the key is activated when transmitting and receiving the PIM information with the PC.

The audio processor 120 may play an audio signal transmitted from the controller 160, for example, an audio signal corresponding to content playback through a speaker SPK. In addition, when the mobile terminal 100 has a mobile communication function, the audio processor 120 may further include a microphone (MIC) for collecting a user's voice or other audio signal during a call. That is, the audio processor 120 converts the voice / sound data into an audible sound through the speaker SPK under the control of the controller 160, and outputs the audio signal such as a voice received from the microphone MIC. The digital data is output to the control unit 160. In particular, when the PC is connected to the interface unit 140, the audio processor 120 of the present invention may output a set sound indicating a connected state and a disconnected state. In addition, the audio processor 120 may output an alarm indicating completion of data transmission or reception in a data transmission / reception process.

The display unit 130 outputs a screen activated according to the function of the portable terminal. For example, the display unit 130 may output a boot screen, a standby screen, a menu screen, a call screen, and the like. The display unit 130 may be a liquid crystal display (LCD). In this case, the display unit 130 may include an LCD controller, a memory capable of storing data, and an LCD display device. When the LCD is implemented using a touch screen method, the screen of the display unit 130 may be operated as an input unit. In particular, when the SyncML Client is activated by the PC after the PC is connected to the interface unit 140, the display unit 130 of the present invention may output a screen corresponding to the preset image.

The interface unit 140 provides a passage for communicating with another terminal, for example, a PC or a memory chip. The interface unit 140 may include a function of a radio frequency unit when the mobile terminal 100 supports a function of performing wireless communication. In addition, when the portable terminal 100 supports serial communication, the interface unit 140 may be a USB interface or a UART interface. The interface unit 140 may form a communication channel with another terminal, a memory chip, or a network constituting a mobile communication system or the Internet, and receive content such as an image file and a music file through the communication channel. In addition, the interface unit 140 may include a broadcast communication module. In this case, the interface unit 140 may receive a broadcast program received from a broadcast network and transmit the received broadcast program to the controller 160. The interface unit 140 may include all of the various communication interfaces described above. That is, the interface unit 140 may be a radio frequency unit, a USB port, a broadcast communication module, or the like. The interface unit 140 includes all the various communication interfaces, and when the PC is connected to the USB port and the mobile terminal operates as a SyncML client, the functions of other communication interfaces may be deactivated.

The storage unit 150 stores an image file and an MP3 file transmitted from an external device such as another portable terminal or a server, as well as application programs necessary for performing the operation of the portable terminal 100, phonebook data according to a user input, Message data and email data transmitted from the mobile terminal are stored. The storage unit 150 may largely include a program area and a data area.

The program area may include an operating system (OS) for booting a terminal, an application program for supporting various functions of the terminal, for example, a call function, a file playback function, a menu selection function, a list search function such as a picture, a broadcast viewing function, and the like. It stores applications such as web browsers to support message writing and web surfing. In particular, the program area of the present invention stores the SyncML Client application and the Media Transfer Protocol (MTP). After the PC is connected to the interface unit 140, the SyncML Client application program may be activated according to a control signal transmitted from the PC. When the SyncML Client is activated, the MTP may be activated according to the control of the controller 160. It is located at the upper layer of USB port, and supports data transmission standard and process of sending and receiving.

The data area is an area in which data generated according to the use of the mobile terminal is stored, and user data related to various optional functions, for example, a captured image or a video by a camera function when the mobile terminal includes a camera, phone book data, Information corresponding to audio data and user data may be stored. In particular, the data area of the present invention stores PIM information, which is personal information, such as phonebook data, message data, and email data. The PIM information may be transmitted to the PC through the interface unit 140. The PIM information may be updated based on PIM information modified in a PC according to SyncML Client control.

The controller 160 controls the power supply of the terminal 100 and the activation of each device, and the flow of signals transmitted and received between the devices. In particular, the control unit 160 of the present invention is inserted into the interface unit 140, when the control signal is transmitted from the PC through the cable, according to the control signal activation control of the various applications stored in the storage and Data transfer can be controlled. To this end, the control unit 160 of the present invention may include the configuration of the MTP 161 and the transmission control unit 163 as shown in FIG.

The MTP 161 is disposed between the interface unit 140 and the transmission control unit 163 to process a signal transmitted from the interface unit 140 and transmit it to the transmission control unit 163, and the interface unit at the transmission control unit 163. Process the signal transmitted to the outside through the 140. The MTP 161 is stored in the storage 150 and loaded at the time when the SyncML Client is activated to perform data transmission processing.

As the PC is connected to the interface unit 140, the transmission controller 163 controls data transmission based on the signal for requesting a data transmission from the PC. When the transmission control unit 163 transmits a control signal for activating the SyncML Client after the PC is connected, the transmission control unit 163 controls to activate the SyncML Client stored in the storage unit 150 accordingly, and the MTP 161 is interfaced in this process. The control may be set to the protocol of 140. When the PIM information request is received from the PC, the transmission control unit 163 generates the SyncML packet by packetizing the PIM information stored in the storage unit 150 according to the MTP 161 standard, and based on the MTP 161. By controlling the transfer to the PC through the interface unit 140. On the other hand, when receiving a request for the attribute information of the data transmitted from the PC in this process, the transmission control unit 163 writes the attribute information of the transmitted data, that is, the attribute for the PIM information as a specific type, for example, MIME type Can be transferred to a PC.

As described above, the mobile terminal 100 according to an embodiment of the present invention, after transmitting the PIM information in the process of transmitting and receiving data based on SyncML by connecting to the PC, after transmitting the attribute information on the PIM information to the PC In order to transmit the PIM information based on the MTP, the packetization is controlled and transmitted based on the MTP. Meanwhile, when receiving the PIM information from the mobile terminal, the PC may receive the attribute information in advance to predict the reception of the PIM information, and control the PIM information to be directly transmitted to the SyncML Server application program, that is, the Sync Manager. The PC and the portable terminal may control to transmit and receive image files, music files, and the like according to the MTP standard and store the image files and music files in the memory of the PC or the storage unit of the portable terminal, respectively.

Meanwhile, in the above description, the portable terminal 100 and the device for data transmission have been described using a PC as an example, but the present invention is not limited thereto. That is, in the data transmission system of the present invention, a PC should be understood as an external device capable of communicating with a portable terminal.

While the present invention has been described with reference to several preferred embodiments, these embodiments are illustrative and not restrictive. As such, those of ordinary skill in the art will appreciate that various changes and modifications can be made according to equivalents without departing from the spirit of the present invention and the scope of rights set forth in the appended claims.

1 is a view schematically showing the configuration of a data transmission system according to an embodiment of the present invention;

2 is a view for explaining a hierarchical structure according to an embodiment of the present invention;

3 is a view illustrating a signal flow transmitted and received between a mobile terminal and a PC according to an embodiment of the present invention;

4 is a flowchart illustrating an operation process of a portable terminal according to an embodiment of the present invention;

5 is a block diagram schematically illustrating a configuration of a mobile terminal according to an embodiment of the present disclosure;

6 is a view showing in more detail the configuration of the control unit of FIG.

Claims (10)

Establishing a communication channel between the mobile terminal and the external device; Requesting, by the external device, personal information management (PIM) information from the portable terminal; Packetizing, by the portable terminal, the PIM information according to a Media Transfer Protocol (MTP) standard; Transmitting, by the portable terminal, a packet corresponding to the PIM information to the external device. The method of claim 1, Transmitting an attribute information request message of data requested by the external device to the portable terminal; Creating, by the portable terminal, an attribute information request message of data corresponding to the PIM information; The method may further include transmitting the created attribute information request message to the external device. The method of claim 1, Forming the communication channel is Activating a SyncML Server stored in the external device; Activating a SyncML Client stored in the mobile terminal according to the control of the external device; Loading the MTP between the SyncML Server and a USB port of the external device; And loading the MTP between the SyncML Client and a USB port of the portable terminal. An external device for establishing a communication channel with the portable terminal and requesting PIM (Personal Information Management) information stored in the portable terminal; And the portable terminal for storing the PIM information and packetizing the PIM information according to an MTP (Media Transfer Protocol) standard according to the request of the external device and transmitting the packetized information to the external device. Transmission system. The method of claim 4, wherein The external device A first USB port for establishing a communication channel with the portable terminal, And activating a SyncML Server according to an input signal, and controlling to arrange a first MTP layer between the SyncML Server layer and the first USB port. The method of claim 5, The mobile terminal A storage unit which stores the PIM information; A second USB port for establishing a communication channel with the external device; And a control unit for controlling the PIM information transmission. The method of claim 6, The control unit A second MTP layer for transmitting the PIM information; And a transmission control unit which is operated in the second MTP layer and controls packetization of the PIM information. The method of claim 7, wherein The transmission control unit And activating a SyncML Client according to the external device control, and arranging a second MTP layer of the mobile terminal as a lower layer of the SyncML Client. The method of claim 8, The external device And transmitting a data attribute information transmission request message to the mobile terminal through the first MTP layer and the first USB port by using the SyncML server. The method of claim 9, The mobile terminal When the data attribute information transmission request message is received from the external device, the data attribute information corresponding to the PIM information is written using the SyncML Client, and the created message is transmitted through the second MTP layer and the second USB port. And transmitting the data to the external device.

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