JP2010088001A - Data transfer control apparatus, information terminal, data transfer system, data transfer control program, data readout program, and data transfer method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the time required for extracting user data stored in a cellular phone terminal or the like. <P>SOLUTION: The cellular phone terminal 10 notifies a personal computer 50 of the amount of user data used (step S3). The personal computer 50 compares the amount of user data used with a threshold (step S4). If the amount of use is less than the threshold, an extraction system is selected for the unit of a file (step S5) but if the amount of use is equal to or more than the threshold, the extraction system is selected for the unit of a block (step S6). The cellular phone terminal 10 determines which system the extraction system reported from the personal computer 50 (step S7) is (step S8) and if it is the system for the unit of a file, processing after step S10 is performed to transfer user data (step S16) but if it is the system for the unit of a block, user data are transferred (step S16) with a block image in step S15. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a data transfer control device, an information terminal, a data transfer system, a data transfer control program, a data read program, and a data transfer method suitable for reading user data stored in a mobile device such as a mobile phone terminal. About.

  Conventionally, for example, when repairing a mobile phone terminal or exchanging a mobile phone terminal from an old model to a new model, at a repair service center or mobile phone store, The user data stored in the mobile phone terminal is extracted, and the user data is transferred to a new model mobile phone terminal after repair or a new model.

  Here, when extracting user data from a mobile phone terminal, either a data extraction method in file units or a data extraction method in block units has been conventionally used. The file unit is a logical unit when the so-called file system handles data. The block unit is a physical unit when the file system manages a storage area on a built-in memory (for example, a so-called flash memory) of a mobile phone terminal or the like. When data is extracted in units of blocks, each block on the memory is extracted as image data (block image). The notation of the file unit as the logical unit and the block unit as the physical unit is an example, and other notations may be used.

  FIG. 3 shows a schematic configuration of a data transfer system that extracts user data from the mobile phone terminal 100 and transfers it to the personal computer 110 in a repair service center or a mobile phone store. 4 shows a data transfer sequence when user data is transferred from the mobile phone terminal 100 to the personal computer 110 in the data transfer system of FIG.

  3 and 4, the cellular phone terminal 100 and the personal computer 110 are connected by, for example, a USB (Universal Serial Bus) cable.

  When a program for extracting and transferring user data from the mobile phone terminal 100 is activated on the personal computer 110 side, the personal computer 110 first prepares a dedicated data read program prepared in advance as a process of step S100. Are loaded into a RAM (Random Access Memory) of the mobile phone terminal 100.

  Next, the personal computer 110 transmits an activation request for activating the readout program to the mobile phone terminal 100 as processing of step S101. When receiving the activation request from the personal computer 110, the cellular phone terminal 100 activates the reading program loaded in the RAM.

  The cellular phone terminal 100 in which the reading program has been activated extracts the user data stored in the internal flash memory in accordance with the method determined by the reading program and transfers it to the personal computer 110 as processing in step S102. That is, in this case, in the read program, it is determined in advance that only one of the above-described file-unit data extraction method and block-unit data extraction method is used. Therefore, at the time of the processing in step S102, the cellular phone terminal 100 extracts user data from the flash memory by the predetermined data extraction method, and transfers the extracted user data to the personal computer 110.

  Japanese Unexamined Patent Application Publication No. 2006-197433 (Patent Document 1) discloses a technique for increasing the complexity and processing speed of a large amount of user data transfer processing. In other words, according to the technology described in Patent Document 1, the exchange-source mobile phone terminal temporarily stores user data in the Flash ROM in the RAM, and processes the user data stored in the RAM into a unique communication protocol format. Then, the data is transferred to a personal computer and saved. In the personal computer, user data in a unique communication protocol format is held, and then transferred to the exchanged mobile phone terminal. Then, the exchange-destination mobile phone terminal restores and retrieves the user data before processing from the user data in the unique communication protocol format, and stores it in the internal flash ROM.

  Japanese Patent Laid-Open No. 2004-220272 (Patent Document 2) finds a process (data transfer process) having a relatively long work time in a repair line of a mobile phone terminal or the like, and includes a plurality of work processes. The technology which raises the work efficiency of repair by introducing the equipment (personal computer) of this and performing the work process in parallel is disclosed.

JP 2006-197433 A (FIG. 3) JP 2004-220272 A (FIG. 1)

  By the way, the above-described data extraction method in units of files requires processing for opening / closing each file in order to check the logical connection of each file, and the mobile phone terminal needs to open / close each file. The processing load on the CPU (central processing unit) increases. In particular, a CPU mounted on a mobile phone terminal has a certain limit in processing speed at present, and as the number of files increases, the processing time for opening / closing these files increases as a whole. As a result, the data extraction time also becomes longer.

  On the other hand, in the case of the above-described block-unit data extraction method, file open / close processing as in the above-described file-unit data extraction method is not required. Therefore, for example, the data extraction time does not become long because the processing speed of the CPU of the mobile phone terminal is slow or the number of files increases. However, in the case of the block-based data extraction method, those block images are transferred as binary data for all blocks of the flash memory. For this reason, the processing time in the case of the block-based data extraction method depends on the data read performance of the flash memory. That is, in this case, a certain amount of time is required for extracting data.

  In particular, when repairing multiple mobile phone terminals at a repair service center or mobile phone dealer, or when replacing multiple mobile phone terminals from an old model to a new model, the above data extraction The length of time required is directly related to whether repair work and model change work can be proceeded quickly and efficiently. Therefore, it is desired to shorten the data extraction time.

  The present invention has been proposed in view of such circumstances, for example, a data transfer control device, an information terminal, and a data transfer that can shorten the extraction time of user data stored in a mobile device such as a mobile phone terminal. It is an object to provide a system, a data read program, a data transfer control program, and a data transfer method.

  In the present invention, the information terminal notifies the data transfer control device of information corresponding to the amount of the predetermined data stored in the storage unit, and the data transfer control device displays the comparison result between the amount of the predetermined data and the predetermined threshold value. Based on this, either the first extraction method for extracting predetermined data in logical units from the storage unit of the information terminal or the second extraction method for extracting predetermined data in physical units of the storage unit is selected. Then, the data transfer control device notifies the information terminal of the selected extraction method, and the information terminal extracts predetermined data from the storage unit by the notified extraction method and transfers it to the data transfer control device. Thereby, this invention solves the subject mentioned above.

  That is, according to the present invention, one of the first extraction method for extracting predetermined data in logical units and the second extraction method for extracting predetermined data in physical units of the storage unit is used as the amount of predetermined data in the storage unit. And selected according to the comparison result of the predetermined threshold. Therefore, by appropriately setting the predetermined threshold value, an optimum extraction method is selected for the predetermined data amount.

  In the present invention, in the first extraction method by the logical unit and the second extraction method by the physical unit, the optimum extraction method according to the comparison result between the predetermined amount of data in the storage unit and the predetermined threshold is selected, With this extraction method, predetermined data is extracted from the storage unit and transferred. Thus, according to the present invention, it is possible to shorten the extraction time of user data stored in a mobile device such as a mobile phone terminal.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  In the following embodiment, a system including a mobile phone terminal and a personal computer is cited as an application example of the present invention. However, the contents described in the present embodiment are merely examples, and the present invention is limited to this example. It goes without saying that it is not done.

[Data Transfer System of this Embodiment and Functions of Mobile Phone Terminal and Personal Computer]
FIG. 1 shows the present invention in which user data is extracted from a mobile phone terminal 10 which is an information terminal of the present invention and transferred to a personal computer 50 which is a data transfer control device of the present invention, for example, at a repair service center or a mobile phone store. 1 shows a schematic configuration of a data transfer system according to an embodiment. 2 shows a data transfer sequence when user data is transferred from the mobile phone terminal 10 to the personal computer 50 in the data transfer system of this embodiment shown in FIG.

  In the embodiment of the present invention, as shown in FIG. 1, the mobile phone terminal 10 includes a CPU 11, a storage unit 12, and a data transmission / reception 13 as main components. The storage unit 12 of the mobile phone terminal 10 includes a RAM 31 and a flash memory. For example, a user data storage unit 32 for storing user data is prepared in the flash memory. Note that the mobile phone terminal 10 of the present embodiment naturally includes various components included in a general mobile phone terminal, but FIG. 1 illustrates only main components according to the present embodiment. Other components are omitted.

  Similarly, the personal computer 50 includes a CPU 51, a storage unit 52, and a data transmission / reception unit 53 as main components. The storage unit 12 of the personal computer 50 includes an HDD (hard disk drive), a rewritable semiconductor memory, a RAM, and the like. For example, the HDD includes a storage unit 71 for storing a data read program described later and a threshold value described later. A storage unit 72 for storage is prepared, and a storage unit 73 for temporarily storing user data extracted from the mobile phone terminal is provided. The personal computer 50 according to the present embodiment naturally includes various components included in a general personal computer, but FIG. 1 illustrates only main components according to the present embodiment. The components of are omitted.

  1 and 2, the cellular phone terminal 10 and the personal computer 50 are connected by, for example, a USB cable.

  In the personal computer 50, when the data transfer control program of the embodiment of the present invention for extracting user data from the mobile phone terminal 10 is activated, the CPU 51 includes at least the data transfer control unit 61, the model determination unit 62, and the extraction method determination unit 63. Each function can be executed. That is, the data transfer control unit 61, the model determination unit 62, and the extraction method determination unit 63 represent functions executed by the CPU 51 of the personal computer 50 when the data transfer control program of the embodiment of the present invention is started. .

  After the data transfer control program is started, first, the data transfer control unit 61 acquires a data read program dedicated to the mobile phone terminal prepared in advance in the data read program storage unit 71 of the storage unit 52.

  For example, when the data reading program differs for each model of the mobile phone terminal, a plurality of data reading programs corresponding to each model are prepared in the data reading program storage unit 71 in advance. In other words, new products are being developed every day for mobile phone terminals. For example, when the memory configuration and its control parameters are changed in the process, the data reading program for each model is also changed. A plurality of data read programs corresponding to each model are prepared in the data read program storage unit 71. In this case, prior to the data read program acquisition processing by the data transfer control unit 61, the model determination unit 62 determines the model of the mobile phone terminal. More specifically, the model determination unit 62 receives, for example, a device ID from the mobile phone terminal 10 connected by the USB cable or the like, and determines the model of the mobile phone terminal based on the device ID or the like. Then, the model determination unit 62 notifies the data transfer control unit 61 of the model determination result. When the model determination result is received, the data transfer control unit 61 acquires a data read program corresponding to the model from a plurality of data read programs prepared in advance in the data read program storage unit 71. In addition, the model determination of the mobile phone terminal may be performed by an operator who operates the personal computer 50. In this case, the data transfer control unit 61 acquires the data read program from the data read program storage unit 71 based on the model determination result by the operator.

  The data transfer control unit 61 that has acquired the data reading program as described above sends the data reading program to the mobile phone terminal 10 through the data transmitting / receiving unit 53 as the processing of step S1 in FIG. Load into RAM 31.

  Next, the data transfer control unit 61 sends an activation request for activating the data reading program loaded in the RAM 31 of the cellular phone terminal 10 through the data transmission / reception unit 53 as the process of step S2 of FIG. It transmits to the telephone terminal 10. When receiving the activation request, the CPU 11 of the mobile phone terminal 10 activates the data read program loaded in the RAM 31.

  When the data reading program is activated, the CPU 11 of the mobile phone terminal 10 at least the user data usage management unit 21, the user data notification control unit 22, the extraction method determination unit 23, and the user data extraction control, as shown in FIG. Each function of the unit 24 can be executed. That is, the user data usage management unit 21, the user data notification control unit 22, the extraction method determination unit 23, and the user data extraction control unit 24 are executed by the CPU 11 of the mobile phone terminal 10 when the data reading program is started. Represents the function to be performed. The user data usage management unit 21 may be a function that is executed by, for example, a memory management program or the like that is originally provided in the mobile phone terminal 10.

  After starting the data reading program, the user data usage management unit 21 obtains the amount of user data stored in the user data storage unit 32 in the storage unit 12, that is, the user data usage.

  Next, the user data usage amount notification control unit 22 notifies the personal computer 50 of information representing the user data usage amount obtained from the user data usage amount management unit 21 through the data transmission / reception unit 13 as processing of step S3. To do. When the user data usage management unit 21 is a function executed by a memory management program or the like originally provided in the mobile phone terminal 10, the user data usage notification control unit 22 Information representing user data usage, which is obtained and managed in advance by the user data usage management unit 21 which is a function of a program or the like, is notified to the personal computer 50 through the data transmitting / receiving unit 13.

  When the notification of the information indicating the amount of user data used is received, the extraction method determination unit 63 on the personal computer 50 side extracts user data from the user data storage unit 32 of the mobile phone terminal 10 as the process of step S4. Then, it is determined (selected) which one of the above-described file-unit data extraction method or block-unit data extraction method should be used.

  In the present embodiment, the extraction method determination unit 63 compares the user data usage amount with the threshold value stored in the threshold value storage unit 72. If the user data usage amount is less than the threshold value, the process proceeds to step S5. The process proceeds to select the extraction method in units of files. On the other hand, if the user data usage is equal to or greater than the threshold, the process proceeds to step S6 to select the extraction method in units of blocks.

  Here, the file unit is a logical unit when the so-called file system handles data as described above. The block unit is a physical unit when the file system manages the storage area (user data storage unit 32) on the memory of the mobile phone terminal 10, and the data extraction in the block unit is performed as a block image. The block image is transferred as a single binary file. The notation of the file unit as the logical unit and the block unit as the physical unit is an example, and other notations may be used.

  Further, in the present embodiment, the threshold value is determined based on the time required to open / close all files stored in the user data storage unit 32 (which roughly corresponds to user data usage), the user This value is determined based on the time required to extract the image data of all blocks in the data storage unit 32 at once. That is, in the present embodiment, the total processing time when each file of user data is opened / closed is determined in advance for each user data usage (that is, for each number of files). The total processing time that is considered to exceed the batch extraction time of all block images in the user data storage unit 32 in the time is obtained, and the user data usage (that is, the number of files) corresponding to the total processing time in that case is obtained. Is set as the threshold value. Therefore, in this embodiment, when the amount of user data used is small, that is, the number of user data files in the user data storage area 32 is small, the time required to open / close these files corresponds to the above threshold. If it is shorter than the selected time, the extraction method in units of files is selected. On the other hand, when the amount of user data used is large, that is, because the number of user data files in the user data storage area 32 is large, the time required to open / close these files is longer than the time corresponding to the threshold value. If so, the extraction method in units of blocks is selected.

  In the present embodiment, for example, when different threshold values are set for each model of the mobile phone terminal, the threshold value storage unit 72 is prepared with a plurality of threshold values corresponding to each model. That is, for example, when a memory having a different configuration, a memory having a different reading speed, a CPU having a different processing speed, or the like is used for each model of the mobile phone terminal, the threshold value is optimized for each model. It is desirable to use a different value. In this case, prior to the determination process by the extraction method determination unit 63, for example, the model determination unit 62 determines the model of the mobile phone terminal. The model determination unit 62 at this time determines the model of the mobile phone terminal based on the device ID of the mobile phone terminal 10 or the like, for example, as described above. Then, the model determination unit 62 notifies the extraction method determination unit 63 of the model determination result. Upon receipt of the model determination result, the extraction method determination unit 63 acquires a threshold corresponding to the model determination result from a plurality of thresholds optimized for each model stored in the threshold storage unit 72. Then, using the acquired threshold value, the comparison determination process with the user data usage is performed as described above.

  In addition, when a different threshold is used for each model of the mobile phone terminal, the threshold storage unit 72 stores only a reference threshold, and a weighting value corresponding to each model is stored with respect to the reference threshold. An optimum threshold value may be obtained for each model by performing addition / subtraction or multiplication / division. In the case of this example, the extraction method determination unit 63 adds or subtracts or multiplies or multiplies the weighting value according to the model determination result with respect to the reference threshold value of the threshold value storage unit 72, so that it is optimal for each model. A threshold value is generated, and a comparison determination process with the user data usage is performed using the generated threshold value as described above.

  When the extraction method is selected as described above, the data transfer control unit 61 of the personal computer 50 transmits the information indicating the selected extraction method to the mobile phone terminal 10 through the data transmission / reception unit 53 as the process of step S7. Instruct (notify).

  Upon receiving the extraction method instruction, the extraction method determination unit 23 of the mobile phone terminal 10 determines whether the extraction method instructed from the personal computer 50 side is the extraction method in units of files or a block as processing in step S8. It is determined which unit extraction method is used, and the determination result is notified to the user data extraction control unit 24.

  When the extraction method notified from the extraction method determination unit 23 is the extraction method in units of files, the user data extraction control unit 24 proceeds to the process from step S10 onward, while the extraction method in units of blocks is performed. If there is, the process proceeds to step S15.

  If it is determined in step S8 that the extraction method is in units of files and the processing proceeds to step S10 and subsequent steps, the user data extraction control unit 24 stores the processing from step S10 to step S14 in the user data storage unit 32. Execute for all existing files. That is, for each file in the user data storage unit 32, a file open process in step S11, a file read process in step S12, and a file close process in step S13 are performed.

  Then, the user data extraction control unit 24 transfers the user data extracted in units of the files in step S10 to step S14 to the personal computer 50 through the data transmission / reception unit 13 as the process of step S16.

  On the other hand, if it is determined in step S8 that the extraction method is in units of blocks and the process proceeds to step S15, the user data extraction control unit 24 collects all the block images in the user data storage unit 32 as binary data. Perform the reading process.

  Then, the user data extraction control unit 24 transfers the user data extracted in a block unit at the above step S15 to the personal computer 50 through the data transmission / reception unit 13 as the process of step S16.

  The user data transferred from the mobile phone terminal 10 in step S <b> 16 described above is temporarily stored in the user data temporary storage unit 73 of the personal computer 50. The user data stored in the user data temporary storage unit 73 is then transferred to, for example, a repaired mobile phone terminal or a new model mobile phone terminal.

[Summary]
As described above, in the data transfer system according to the embodiment of the present invention, since an optimum data extraction method is selected in accordance with the user data usage of the mobile phone terminal 10, the user data stored in the mobile phone terminal is selected. It is possible to shorten the extraction time. That is, according to the present embodiment, for example, when the amount of user data used is small (that is, when the number of files is small), a data extraction method in units of files is selected, and only a small number of files are opened / closed. Data extraction is performed in a short time. Therefore, in this case, the time for extracting data is shortened as compared to the case where a certain amount of time is required regardless of the amount of user data, as in the data extraction method in units of blocks. Can do. On the other hand, when the amount of user data used is large (that is, when the number of files is large), a data extraction method in units of blocks is selected, and data extraction is performed in batches in units of the blocks. Therefore, in this case, since it is not necessary to open / close a large number of files sequentially as in the case where user data having a large amount of data is extracted in units of files, the time for extracting data can be shortened. For this reason, according to the data transfer system of the present embodiment, in an environment where user data needs to be extracted from a large number of mobile phone terminals, such as a repair service center or a mobile phone store, for example, the mobile phone terminal Data transfer time per unit can be shortened, and as a result, overall work time can be shortened and work efficiency can be improved. In the data transfer sequence of the embodiment of the present invention, compared with the conventional data transfer sequence, the sequence for user data usage notification, data extraction method determination, etc. is increased, but the time required for these is actually It is extremely short compared with the time required for extracting user data. On the other hand, when the data transfer sequence of this embodiment is used, the required time can be significantly shortened compared to the time required for data extraction by the conventional data transfer sequence, so the influence of the increase in the sequence is almost ignored. it can.

  In the present embodiment, the threshold value can be changed according to the model of the mobile phone terminal. For this reason, according to this embodiment, the data transfer process optimized for each model of the mobile phone terminal can be performed, and the working time can be shortened and the working efficiency can be improved.

  In addition, according to the present embodiment, the functions are shared between the mobile phone terminal side and the personal computer side, the above-described data transfer control program is executed on the personal computer side, and loaded from the personal computer side on the mobile phone terminal side. The read data reading program is executed. Therefore, the mobile phone terminal side does not depend on the internal software at the time of shipment, does not need to change the internal software, and can easily customize the data extraction processing, etc. by only changing the loaded data reading program. It becomes feasible. On the personal computer side, various customizations can be realized by a simple process such as changing a setting information file of a threshold value to be used. That is, on the personal computer side, it is possible to set a more effective threshold due to the ease of customization of the threshold.

  For example, in an environment where user data must be extracted from hundreds of mobile phone terminals per day, such as a repair service center, the user data of mobile phone terminals that are actually repaired is used. If the statistics of the quantity and the threshold are taken and the threshold is changed and optimized based on the statistical result, the data transfer time can be shortened and the work efficiency can be further improved. That is, for example, the amount of user data used and the type of user data change with the passage of time after the release of the mobile phone terminal, and the user data extraction work at the time of repair of the mobile phone terminal at the beginning of sales, In the user data extraction work at the time of repair after the cellular phone terminal is sufficiently used, the usage amount and type of the user data naturally change. Therefore, if these changes are statisticalized and the statistical results are reflected in the data read program (for example, reflected in the extraction method determination function or the like), more efficient data extraction is possible.

  The above description of the embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made according to the design or the like as long as the technical idea according to the present invention is not deviated.

  In the embodiment described above, an example of selecting the extraction method according to the amount of user data used is given, but the extraction method may be selected according to the number of user data files. That is, for example, when the user data usage is small but the number of files is very large, the transfer method in the block unit may shorten the transfer time than the extraction method in the file unit. Conceivable. Conversely, if the user data usage is large but the number of files is very small, the file-based extraction method may shorten the transfer time compared to the block-based extraction method. Conceivable. Therefore, in such a case, selecting the extraction method according to the number of user data files is considered to have a certain effect on the efficiency of the data transfer process.

  In the above-described embodiment, an example of selecting a file unit extraction method when the user data usage amount is small and selecting a block unit extraction method when the user data usage amount is large is described. This is also included in the present invention. That is, for example, due to the relationship between the processing capability of the CPU on the mobile phone terminal side and the memory performance, for example, when the user data usage is large, the file unit extraction method is selected rather than the block unit extraction method. When the transfer time is shortened, it is possible to select the block unit extraction method when the user data usage amount is small, and to select the file unit extraction method when the user data usage amount is large.

  In addition, in the above-described embodiment, data transfer between a mobile phone terminal and a personal computer is taken as an example. However, the present invention can be used for various purposes such as data transfer between other terminals and a personal computer, and data transfer between personal computers. It is also applicable to.

It is a figure which shows schematic structure of the data transfer system of this invention embodiment which extracts user data from a mobile telephone terminal, and transfers to a personal computer. In the data transfer system of this embodiment, it is a transfer sequence figure at the time of transferring user data from a mobile telephone terminal to a personal computer. It is a figure which shows schematic structure of the conventional data transfer system which extracts user data from a mobile telephone terminal, and transfers to a personal computer. FIG. 10 is a transfer sequence diagram when transferring user data from a mobile phone terminal to a personal computer in a conventional data transfer system.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Mobile phone terminal, 11 CPU of mobile phone terminal, 12 Memory | storage part of mobile phone terminal, 13 Data transmitter / receiver of mobile phone terminal, 21 User data usage management part, 22 User data usage notification control part, 23 Mobile phone terminal Extraction method determination unit, 24 user data extraction control unit, 31 RAM, 32 user data storage unit, 50 personal computer, 51 personal computer CPU, 52 personal computer storage unit, 53 personal computer data transmission / reception unit, 61 data transfer Control unit, 62 model determination unit, 63 personal computer extraction method determination unit, 71 data read program storage unit, 72 threshold storage unit, 73 user data temporary storage unit

Claims (13)

A transmission / reception unit for transmitting / receiving data to / from the data transfer source terminal;
A first extraction method for extracting the predetermined data in logical units from the storage unit of the data transfer source terminal based on a comparison result between the amount of the predetermined data stored in the storage unit of the data transfer source terminal and a predetermined threshold; A determination unit that selects any one of the second extraction method for extracting the predetermined data in physical units of the storage unit;
Information corresponding to the amount of predetermined data stored in the storage unit of the data transfer source terminal is received through the transmission / reception unit, information corresponding to the amount of the predetermined data is sent to the determination unit, and selected by the determination unit A control unit for notifying the data transfer source terminal of the extraction method through the transmission / reception unit;
A data transfer control device.   The determination unit selects the first extraction method when the amount of the predetermined data is smaller than a predetermined threshold value, and selects the second extraction method when the amount of the predetermined data is equal to or greater than the predetermined threshold value. Data transfer control device.   The data transfer control device according to claim 1 or 2, wherein the determination unit compares the amount of the predetermined data with a predetermined threshold corresponding to a model of the data transfer source terminal.   The control unit loads a data read program for the data transfer source terminal to extract predetermined data from the storage unit and transfer it to the device by the extraction method notified from the device to the data transfer source terminal. The data transfer control device according to claim 1. A storage unit for storing at least predetermined data;
A transmission / reception unit for transmitting / receiving data to / from the data transfer destination device;
The data extraction method notified from the data transfer destination device through the transmission / reception unit includes a first extraction method for extracting the predetermined data in logical units from the storage unit, and a second method for extracting the predetermined data in physical units of the storage unit. A determination unit for determining whether the extraction method is any one of
Information corresponding to the amount of the predetermined data stored in the storage unit is notified to the data transfer destination device through the transmission / reception unit, and the predetermined data is extracted from the storage unit by the extraction method determined by the determination unit. A control unit for transferring to the data transfer destination device through the transmission / reception unit;
An information terminal.   The functions of the determination unit and the control unit include a data reading program for extracting predetermined data from the storage unit and transferring the data to the data transfer destination device using the data extraction method notified from the data transfer destination device. 6. The information terminal according to claim 5, wherein the information terminal is executed by being loaded by the data transfer destination device and being activated by the central processing unit. Information corresponding to the amount of predetermined data stored in the storage unit is notified to the data transfer control device, and the data extraction method notified from the data transfer control device extracts the predetermined data in logical units from the storage unit. It is determined whether one extraction method or a second extraction method in which the predetermined data is extracted in physical units of the storage unit, and the predetermined data is extracted from the storage unit by the determined extraction method. An information terminal for transferring to the data transfer control device;
The information corresponding to the amount of the predetermined data stored in the storage unit of the information terminal is received, and based on the comparison result between the received amount of the predetermined data and the predetermined threshold, the predetermined value is stored from the storage unit of the information terminal. Either one of a first extraction method for extracting data in logical units and a second extraction method for extracting the predetermined data in physical units of the storage unit is selected, and the selected extraction method is sent to the information terminal. A data transfer control device to notify;
A data transfer system.   The data transfer control device selects the first extraction method when the amount of the predetermined data is smaller than a predetermined threshold, and selects the second extraction method when the amount of the predetermined data is equal to or greater than a predetermined threshold. 8. The data transfer system according to 7.   The data transfer system according to claim 7 or 8, wherein the data transfer control device performs comparison with the amount of the predetermined data using a predetermined threshold corresponding to a model of the information terminal. The data transfer control device loads a data read program for the information terminal to extract predetermined data from the storage unit and transfer it to the device by the extraction method notified from the device to the information terminal,
8. The data transfer system according to claim 7, wherein the information terminal activates and executes the data read program loaded by the data transfer control device. A first extraction method for extracting the predetermined data in logical units from the storage unit of the data transfer source terminal based on a comparison result between the amount of the predetermined data stored in the storage unit of the data transfer source terminal and a predetermined threshold; A determination unit that selects any one of the second extraction method for extracting the predetermined data in physical units of the storage unit;
The information corresponding to the amount of the predetermined data stored in the storage unit of the data transfer source terminal is received through the transmission / reception unit, the information corresponding to the amount of the predetermined data is sent to the determination unit, and the extraction selected by the determination unit is performed. As a control unit that notifies the data transfer source terminal of the method through the transmission / reception unit,
A data transfer control program that causes a computer to function. The data extraction method notified from the data transfer destination device through the transmission / reception unit includes a first extraction method for extracting predetermined data in logical units from the storage unit and a second extraction method for extracting the predetermined data in physical units of the storage unit. , A determination unit for determining which is either,
Information corresponding to the amount of the predetermined data stored in the storage unit is notified to the data transfer destination device through the transmission / reception unit, and the predetermined data is extracted from the storage unit by the extraction method determined by the determination unit. As a control unit that transfers to the data transfer destination device through the transmission / reception unit,
A data reading program that causes a computer to function. The information terminal notifying the data transfer control device of information corresponding to the amount of predetermined data stored in the storage unit of the terminal;
A data transfer control device receiving information corresponding to the amount of predetermined data stored in the storage unit notified by the information terminal;
Based on the comparison result between the received amount of the predetermined data and a predetermined threshold value, a first extraction method for extracting the predetermined data in logical units from the storage unit of the information terminal, and the physical unit of the storage unit A step in which the data transfer control device selects one of the second extraction methods for extracting predetermined data;
A step in which the data transfer control device notifies the information terminal of the selected extraction method;
The data extraction method notified from the data transfer control device includes a first extraction method for extracting the predetermined data from the storage unit in logical units, and a second extraction method for extracting the predetermined data in physical units of the storage unit. A step in which the information terminal determines whether the
The information terminal extracts the predetermined data from the storage unit and transfers the data to the data transfer control device according to the determined extraction method;
A data transfer method.

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