JP4572592B2 - Storage device - Google Patents

Description

The present invention relates to management technology for data storage medium for storing a Data file.

  In recent years, data files stored in mobile phones include phone book data files, e-mail data files, download data files from WEB sites, and photo data files taken with digital cameras equipped with mobile phones. Data files with large data volumes tend to increase. Although the capacity of data storage media for storing a large number of data files has increased, the stored data files (hereinafter referred to as existing data files) are appropriately deleted and arranged by the user. Unless the free space of the medium is secured, the free space of the data storage medium gradually decreases, and finally a request to save a new data file (hereinafter referred to as a new data file) (hereinafter referred to as a new data file). Even if a save request is generated, the data capacity of the new data file exceeds the free capacity of the data storage medium, so that it cannot be newly saved in the data storage medium (hereinafter referred to as this state, Memory full state)).

  In a conventional mobile phone, the user confirms the free space of the data storage medium at any time, and deletes and organizes existing data files as needed before the memory full state frequently occurs, and performs an operation to secure free space In this case, it is necessary to select and delete data files to be deleted one by one from a large number of existing data files, and the operation is complicated and takes a considerable amount of time. For this reason, it is difficult to expect such an operation from all users, and as a result, memory full states frequently occur in many mobile phones.

  Therefore, when the memory becomes full, the user selects and deletes the data file to be deleted from the existing data file at the timing when a new save request occurs, and the free space is sufficient to save the new data file. The user is provided with an overwrite operation means for saving the new data file and the convenience is improved. Also in this overwriting operation means, the user selects and deletes data files to be deleted one by one from existing data files until the free space of the data storage medium exceeds the capacity of the new data file. It is necessary to repeat, and when the free space of the data storage medium exceeds the capacity of the new data file, the new data file is stored in the data storage medium.

  However, in such overwriting operation means, the user selects and deletes data files to be deleted one by one from a large number of existing data files at the timing when a new save request is generated. When the capacity is large, there are a large number of data files to be deleted, and the operation is complicated and requires a considerable amount of time. For this reason, it has been difficult to respond to a new storage request with immediacy such as taking an instant photograph and storing a photograph data file.

  Also, Patent Document 1 relates to a mobile terminal that communicates with a distribution server, and the content to be distributed to the distribution server to the distribution server when the free capacity of the data storage medium of the mobile terminal is equal to or less than a predetermined value. In the case where there is a data file, a technique for selecting and deleting an existing data file stored in a data storage medium of a portable terminal or saving it to a distribution server is disclosed. However, in this case, on the portable terminal side, the fact that the free space of the data storage medium is equal to or less than a predetermined value is first transmitted to the distribution server, and the distribution server that has received this should distribute to the portable terminal When there is a data file to be distributed by determining the presence or absence of a data file, the mobile terminal sends information instructing to secure free space, and when the mobile terminal receives the information, the user The data file is selected and deleted, or selected and saved in the distribution server. Therefore, the operation for securing the necessary free space in the data storage medium of the portable terminal is complicated and takes a considerable amount of time, and it is difficult to respond to a new storage request with immediacy. In the case of a data file other than the data file distributed from the distribution server, such as a photo data file, an empty capacity cannot be secured by such a method.

In other words, storage devices such as conventional mobile phones are in a state where the operation for securing the free space on the data storage medium is complicated and takes a considerable amount of time, and it is difficult to respond to a new storage request with immediacy. There was a problem that occurred.

JP 2002-116945 A (page 2-3, FIG. 1)

The present invention has been made in order to solve the above-described problems, and performs an operation for securing a free space in a data storage medium in a short time and responds to a new storage request with immediacy. A storage device that can be used is provided.

A storage device according to the present invention includes a data file storage unit that stores at least one data file, and an empty capacity target value that is set and deleted so that an empty capacity that is larger than the empty capacity target value is set to the data file storage unit A deletion candidate selection unit that creates in advance at least one deletion candidate data file set that is a set of two or more existing data files that is secured in the data file storage unit, and a free space in the data file storage unit is smaller than a predetermined threshold, and A deletion execution unit that deletes, from the data file storage unit, data files that constitute a deletion candidate data file set corresponding to an empty capacity target value that is greater than or equal to a predetermined threshold selected by the deletion candidate selection unit when the processing start condition is satisfied It is equipped with.

According to the invention, by deleting the data file with the immediacy when necessary to remove the Data file it occurs, ensuring a free space required, the storage device that can meet the new storage request with the immediacy Obtainable.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a mobile phone which is a mobile device according to Embodiment 1 of the present invention, in which a microcomputer 10 is connected to a data memory 12 and a system memory 14 which are data file storage units. While exchanging data, it realizes basic communication functions and various application functions. The data memory 12 stores data files, and the system memory 14 stores application programs executed by the mobile phone.

  The microcomputer 10 is also connected to a liquid crystal display 16 provided in a mobile phone for displaying information and a key matrix 18 provided in the mobile phone for inputting information to the mobile phone from the outside. Yes. The microcomputer 10 provides various types of display information to the liquid crystal display 16 and inputs information according to the user's operation from the key matrix 18 to provide a man-machine interface for the user. A device for providing these man-machine interfaces is not limited to the combination of the liquid crystal display 16 and the key matrix 18, and any device capable of providing a man-machine interface for the user may be used. It may be provided or connected by communication means.

  The microcomputer 10 includes therein a deletion candidate selection unit 20, a deletion execution unit 22, and an application execution unit 24. The deletion candidate selection unit 20 detects the free capacity of the data memory 12, sets one or more free capacity target values having a value larger than the free capacity, and stores these as a target value management table. The microcomputer 10 has an internal memory (not shown) inside, and stores a target value management table 20a.

  Further, the deletion candidate selection unit 20 acquires attribute information such as the capacity, storage date / time, and access history of the existing data file from the data memory 12, and stores this in the internal memory of the microcomputer 10 as the attribute information management table 20b. Further, the deletion candidate selection unit 20 selects one or two or more deletion candidate data file sets for which deletion capacity is ensured by deleting each corresponding empty capacity target value. The deletion candidate rank (hereinafter referred to as the deletion candidate rank), which is the priority order, is assigned and stored in the internal memory of the microcomputer 10 as the deletion candidate management table 20c.

  The deletion execution unit 22 sets a predetermined threshold (hereinafter referred to as a predetermined threshold) of the free capacity of the data memory 12 and a predetermined processing start condition, and sets them as a threshold management register 22a and a processing start condition management table 22b, respectively. And stored in the internal memory of the microcomputer 10.

  The application execution unit 24 appropriately reads an application program from the system memory 14 and executes it, for example, a function of connecting to a WEB site, downloading a data file and storing it in the data memory 12, and a mobile phone A function of saving a photo data file taken by the digital camera in the data memory 12 is realized.

  Next, the operation will be described in detail with reference to the flowchart shown in FIG. First, in the target management table creation step S10, the deletion candidate selection unit 20 shown in FIG. 1 detects the free capacity of the data memory 12, and sets one or two or more free capacity target values having a value larger than this free capacity. These are stored as the target value management table 20a shown in FIG. 1, and the process proceeds to the attribute information management table creation step S12. As a method for setting the free space target value, for example, the maximum value may be set to 50 blocks, and a value that does not fall below the free space in steps of 5 blocks may be set. For example, when the free space is 5 blocks, the free space target value is set from 50 blocks to 10 blocks in increments of 5 blocks. Such a setting method may be stored in the mobile phone as an initial condition, or may be set and changed by a user via a man-machine interface.

  In the attribute information management table creation step S12, the deletion candidate selection unit 20 acquires attribute information such as the capacity, storage date and time, access history, etc. of the existing data file from the data memory 12, and these information is attribute information shown in FIG. The management table 20b is stored in the internal memory of the microcomputer 10, and the process proceeds to the deletion candidate management table creation step S14.

  In the deletion candidate management table creation step S14, the deletion candidate selection unit 20 deletes one or two or more deletions corresponding to each of the empty capacity target values to ensure that an empty capacity equal to or greater than the empty capacity target value is secured. The candidate data file set is stored in the internal memory of the microcomputer 10 as a deletion candidate management table 20c shown in FIG. 1 with deletion candidate ranks, and the process proceeds to processing start condition management table setting step S16.

  More specifically, the deletion candidate selection unit 20 corresponds to each value of the free capacity target value, and the data is more than the difference obtained by subtracting the free capacity from the free capacity target value (hereinafter referred to as insufficient capacity). An existing data file having a large capacity or a set of two or more existing data files whose total data capacity is larger than the shortage capacity, that is, a deletion candidate data file set is created. (In the following description, even if it consists of only one existing data file, it is treated as one of this set, that is, a deletion candidate data file set.) That is, one or more existing data elements that are elements of this deletion candidate data file set If the data file is deleted, an empty capacity equal to or greater than the target empty capacity is secured in the data memory 12.

  The upper limit of the number of deletion candidate data file sets to be created for each free space target value may be set as an initial value, and may be set and changed by the user via the man-machine interface. Good. It is assumed that at least one deletion candidate data file set is created for each free capacity target value, and deletion candidate ranks are assigned. In addition, when only one deletion candidate data file set is created for one empty capacity target value, the first deletion candidate rank is given to this.

  As a method of assigning the deletion candidate rank, for example, a method using a predetermined evaluation function will be described with reference to FIG. FIG. 3 shows the relationship between the attribute information management table 20b and a predetermined evaluation function. In FIG. 3, the same reference numerals as those in FIG. 1 denote the same or corresponding parts. A function ν for determining a predetermined evaluation index is defined, an evaluation index is calculated using the attribute information of the existing data file stored in the attribute information management table 20b as a parameter, and deletion candidate ranks are assigned in the order of the evaluation index. Appropriately select the attribute information used as parameters by appropriately selecting the data capacity, save date / time, read date / time, copy date / time, source of acquisition, charge amount at the time of acquisition, cost required for communication, availability of re-acquisition, etc. An evaluation index can be obtained.

  FIG. 4 shows an example of the deletion candidate management table 20c created in this way. In FIG. 4, the same reference numerals as those in FIG. 1 are the same or equivalent. In FIG. 4, the deletion candidate management table 20c is shown in which deletion candidate data file sets are arranged in the order of the empty capacity target value and the column in the deletion candidate order. The actual information constituting the deletion candidate management table 20c includes the deletion candidate data file set as shown in the corresponding places where the empty capacity target value is 15 blocks and 20 blocks, and the deletion candidate rank is first and second. Index information for specifying an existing data file that is an element of FIG. 4, and the ID number of the existing data file is used in FIG. In addition to the ID number, index information that can identify each existing data file, such as a file name, can be used.

  Returning to the description of FIG. In the process start condition management table setting step S16, the process of determining the deletion target data file set to be actually deleted from the deletion candidate data file set stored as the deletion candidate management table 20c and starting the deletion process is started. A process start condition, which is a condition, is set, and the process proceeds to threshold management register setting step S18. As the processing start condition, for example, when there is an instruction from the user, when saving a data file larger than the free capacity of the data file storage unit, the free capacity of the data file storage unit falls below a predetermined threshold. When the load level of the microcomputer 10 of the mobile phone is low and the remaining battery level is sufficient, when the mobile phone is in a charged state, or when a preset time has arrived, it may be set as appropriate. The preset time may be set at midnight when the possibility of using the mobile phone is low, or may be arbitrarily set by the user.

  In the threshold management register setting step S18, a predetermined threshold is set, and the process proceeds to the process activation determination step S20. As the predetermined threshold value, an appropriate value may be set as an initial value first, and after that, it may be changed as appropriate by a user's operation. This predetermined threshold means the lower limit value of the free capacity of the data memory 12 secured by deleting the deletion target data file set.

  In the process activation determination step S20, a predetermined process activation event, that is, event A: the free space has become smaller than a predetermined threshold, event B: access to an existing data file, event E: process The system waits for any of the events to be detected. When any of these events is detected, processing corresponding to the event is performed.

  Event A: When it is detected that the free space has become smaller than the predetermined threshold value, the process proceeds to the processing start condition conformity determination step S22. In the process start condition conformity determination step S22, it is determined whether or not the process start condition is satisfied. If the processing start condition is met, the process proceeds to the deletion target data file set determination / deletion step S24 (Yes technique), determines the deletion target data file set, deletes it, and proceeds to the attribute information management table update step S26. Then, the attribute information management table 20b is updated, and then the process proceeds to the deletion candidate management table update step S28 to update the deletion candidate management table 20c, and the process returns to the process activation determination step S20. If the process start condition conformity determination step S22 does not meet the process start condition, the process returns to the process start determination step S20 (No skill) and waits until a predetermined process start event is detected.

  In the deletion target data file set determination deletion step S24, the deletion candidate data file corresponding to the empty capacity target value having a value larger than a predetermined threshold among the deletion candidate data file sets stored in the attribute information management table 20b. From the set, one deletion target data file set is determined and deleted based on the deletion candidate order. As a result, an empty capacity larger than a predetermined threshold is secured in the data memory 12.

  Since the determination of the data file set to be deleted can be made based on the attribute information management table 20b created in advance, it can be completed easily and in a short time. For example, the deletion candidate data file set corresponding to the smallest empty capacity target value among the empty capacity target values having a value larger than a predetermined threshold and the deletion candidate rank being the first deletion candidate data file set May be automatically determined as a data file set to be deleted.

  Further, the deletion execution unit 22 selects a plurality of deletion candidate data file sets based on the deletion candidate management table 20c and displays them on the liquid crystal display 16, and the user operates the key matrix 18 to delete them. The target data file set may be determined. Since it is possible to determine the deletion target data file set reflecting the user's intention with respect to the deletion candidate management table 20c automatically set by the deletion candidate selection unit 20, the appropriateness of the determination is increased. Can do. Further, the determination operation by the user is simple and can be completed in a short time because it is only necessary to select and determine 1 from the displayed deletion candidate data file set.

  Since the deletion of one data file set to be deleted determined in this way can be performed in a batch without individually specifying the existing data files as its elements, it can be completed easily and in a short time. it can. Therefore, in the deletion target data file set determination / deletion step S24, it is possible to delete the existing data file with immediacy and secure a necessary free space.

  If event B: access to an existing data file is detected in the process activation determination step S20, the process proceeds to the attribute information management table update step S26, and the attribute information management table 20b is updated. The process moves to the deletion candidate management table update step S28, updates the deletion candidate management table 20c, and returns to the process activation determination step S20. In the attribute information management table update step S26, the storage state of the data file in the data memory 12, that is, the change in the free capacity and the attribute information of each data file is immediately reflected in the attribute information management table 20b and updated. In the deletion candidate management table update step S28, the deletion candidate management table 20c is immediately updated. Therefore, the deletion execution unit 22 can determine the deletion target data file set based on the latest storage state of the data file in the data memory 12. If event E: an instruction to end the process is detected in the process activation determination step S20, the entire process ends.

  According to the mobile phone according to the first embodiment, the deletion candidate data file set is set with the deletion candidate rank assigned in advance based on the free capacity of the data memory 12 and the attribute information of the existing data file. When the free space is smaller than a predetermined threshold value and a predetermined time processing start condition is satisfied, an appropriate 1 is deleted from the deletion candidate data file set so as to secure a free space equal to or larger than the predetermined threshold value. Therefore, it is necessary to secure a free space above a predetermined threshold before a new save request occurs, or to delete an existing data file easily and quickly even when a new save request occurs. Thus, an empty capacity equal to or greater than a predetermined threshold value can be secured, so that a mobile phone that can respond to a new storage request with immediacy can be obtained.

Embodiment 2. FIG.
FIG. 5 is a block diagram showing a mobile phone which is a mobile device according to Embodiment 2 of the present invention, and components having the same reference numerals as those in FIG. 1 are the same or equivalent. The difference between the mobile phone according to the second embodiment shown in FIG. 5 and the mobile phone according to the first embodiment is managed by the deletion executing unit 22 of the mobile phone according to the second embodiment by creating a deletion history information management table 22c. The deletion candidate selection unit 20 uses the information stored in the deletion history information management table 22c for creating and updating the deletion candidate management table 20c.

  The operation of the mobile phone according to the second embodiment will be described with reference to the flowchart shown in FIG. In FIG. 6, the same reference numerals as those in FIG. 2 are the same or equivalent. The flowchart shown in FIG. 6 is obtained by adding a deletion history information management table reading step S30 and a deletion history information management table updating step S32 to the flowchart shown in FIG.

  The process from the start of the operation to the deletion history information management table reading step S30 is the same as that in the first embodiment shown in FIG. 2, and in the deletion history information management table reading step S30, the deletion target data file set determination deletion step S24 is performed. The deletion history information management table 22c for storing the history information of the determination of the data file set to be deleted by the user is read out, stored in the internal memory, and the process proceeds to the threshold management register setting step S18. As will be described later, the deletion history information management table 22c is updated at any time when the user performs an operation related to determination of the data file set to be deleted, and the entire process shown in FIG. When turned off, the data is stored in a nonvolatile internal memory (not shown) provided in the mobile phone.

  The process from the threshold management register setting step S18 to the deletion history information management table update step S32 is the same as that in the first embodiment. In the deletion history information management table update step S32, the deletion target data file set determination deletion step S24 is used. If there is an operation related to determination of the deletion target data file set by the user, the deletion history information management table 22c is updated, and the process proceeds to the attribute information management table update step S26, and then to the deletion candidate management table update step S28.

  The attribute information management table update step S26 is the same as that in the first embodiment. In the deletion candidate management table update step S28, the operation history related to the determination of the data file set to be deleted by the user stored in the deletion history information management table 22c. The deletion candidate management table 20c is updated in consideration of the information. Specifically, in the deletion target data file set determination / deletion step S24, the deletion execution unit 22 selects a plurality of deletion candidate data file sets based on the deletion candidate management table 20c and displays them on the liquid crystal display 16. A deletion candidate data file including an existing data file that is an element of a deletion candidate data file set excluded by the user when the user operates the key matrix 18 to determine a deletion target data file set. Adjust the deletion candidate rank of the set to be lower.

  The mobile phone according to the second embodiment has the same effects as the mobile phone according to the first embodiment, and reflects the user's intention when actually determining the deletion target data file set, and the deletion candidate management table 20c. Therefore, it is less likely that an existing data file that the user does not want to delete is selected as an element of the deletion target data file set that is higher in the deletion candidate order, and the operation for securing the free space of the data memory 12 is performed. Thus, it is also possible to expect an effect of preventing an erroneous operation that erroneously deletes an existing data file that the user does not want to delete.

Embodiment 3 FIG.
FIG. 7 is a block diagram showing a mobile phone which is a mobile device according to Embodiment 3 of the present invention, and the components having the same reference numerals as those in FIG. 1 are the same or equivalent. The difference between the mobile phone according to the third embodiment shown in FIG. 7 and the mobile phone according to the first embodiment is that the deletion execution unit 22 of the mobile phone according to the third embodiment increases the data capacity of the new data file from the application execution unit 24. It is obtained as information and used when setting a predetermined threshold value.

  The operation of the mobile phone according to the third embodiment will be described with reference to the flowchart shown in FIG. In FIG. 8, the same reference numerals as those in FIG. 2 are the same or equivalent. The flowchart shown in FIG. 8 is the same as the flowchart shown in FIG. 2 except that a new data capacity confirmation step S40, a threshold change setting step S42, a free capacity confirmation step S44, a process start condition conformity determination step S46, a deletion target data file set determination deletion step S48, A new data file storage step S50 is added.

  The process from the start of the operation to the process activation determination step S20 is the same as that of the first embodiment shown in FIG. 2. In the process activation determination step S20, event C: a request for saving a new data file is added. ing. The operation when the event A, the event B, and the event E are detected is the same as that in the first embodiment. When the event C: a request for saving a new data file is detected, the process proceeds to a new data capacity confirmation step S40. To do.

  In the new data capacity confirmation step S40, the capacity of the new data file is compared with a predetermined threshold value. If the capacity of the new data file is larger, the process proceeds to the threshold value change setting step S42 (Yes branch). If the capacity of the new data file is not larger, the process proceeds to the empty capacity confirmation step S44 (No branch). In the threshold change setting step S42, the predetermined threshold value is changed and set to a value equal to or larger than the capacity of the new data file, and the process proceeds to the free space confirmation step S44. Most commonly, the predetermined threshold value is set to the same value as the capacity of the new data file.

  In the free space confirmation step S44, the free space of the data memory 12 is compared with a predetermined threshold value. If the free space is smaller, the process proceeds to the processing start condition conformity determination step S46 (Yes branch), and the free space is stored. If it is not smaller, the data memory 12 has enough free space to store the new data file, and the process proceeds to the new data file storage step S50 (No branch). In the process start condition conformity determination step S46, it is determined whether or not the process start condition management table 22b matches a predetermined temporal process start condition. The process proceeds to step S48 (Yes branch), and if not, the process returns to threshold management register setting step S18 (No branch).

  In the deletion target data file set determination / deletion step S48, similarly to the deletion target data file set determination deletion step S24, the deletion execution unit 22 may automatically determine and delete the deletion target data file set. The user may determine and delete the data file set to be deleted via the man-machine interface. Since the predetermined threshold is set to a value larger than the capacity of the new data file, a sufficient free capacity for storing the new data file is secured in the data memory 12.

  In the new data file storing step S50, the new data file is stored in the data memory 12, and the process proceeds to the attribute information management table updating step S26. The operations of the attribute information management table update step S26 and the deletion candidate management table update step S28 are the same as those in the first embodiment. Thereafter, the process returns to the threshold management register setting step S18, and the predetermined threshold is changed by the threshold change setting step S42. Information is reflected in the threshold management register 22a.

  The cellular phone according to the third embodiment has the same effect as the cellular phone according to the first embodiment, and can secure a sufficient free space in the data memory 12 for storing a new data file with immediacy. There is an effect.

Embodiment 4 FIG.
FIG. 9 is a block diagram showing a mobile phone which is a mobile device according to Embodiment 4 of the present invention, and the components having the same reference numerals as those in FIG. 7 are the same or equivalent. The difference between the mobile phone according to the fourth embodiment shown in FIG. 9 and the mobile phone according to the third embodiment shown in FIG. 7 is that the deletion executing unit 22 of the mobile phone according to the fourth embodiment creates the deletion history information management table 22c. Thus, the management function is used, and the information stored in the deletion history information management table 22c is used for setting a predetermined threshold stored in the threshold management register 22a.

  The operation of the mobile phone according to the fourth embodiment will be described with reference to the flowchart shown in FIG. In FIG. 10, the same reference numerals as those in FIG. 6 or FIG. 8 are the same or equivalent. The flowchart shown in FIG. 10 is obtained by adding deletion history information management table reading step S30 and deletion history information management table updating steps S32 and S60 to the flowchart shown in FIG.

  The process from the start of the operation to the deletion history information management table reading step S30 is the same as that of the third embodiment shown in FIG. 8. In the deletion history information management table reading step S30, the deletion target data file set determination deletion step S24 is performed. Alternatively, the deletion history information management table 22c that stores the history information of determination of the deletion target data file set by the user in S48 is read out, stored in the internal memory, and the process proceeds to the threshold management register setting step S18. As in the second embodiment shown in FIG. 6, the deletion history information management table 22c is updated as needed when there is an operation related to the determination of the data file set to be deleted by the user, and the entire process shown in FIG. For example, when the power of the mobile phone is turned off, the data is stored in a nonvolatile internal memory (not shown) provided in the mobile phone.

  From the threshold management register setting step S18 to the deletion history information management table update step S32 or S60 is the same as in the third embodiment. In the deletion history information management table update step S32 or S60, the deletion target data file set determination deletion step S24 is performed. Alternatively, when there is an operation related to determination of the deletion target data file set by the user in S48, the deletion history information management table 22c is updated, and the attribute information management table update step S26, and then the deletion candidate management table update step S28. Migrate to

  The operations of the attribute information management table update step S26 and the deletion candidate management table update step S28 are the same as those in the third embodiment, and then the process proceeds to the threshold management register setting step S18. In the threshold management register setting step S18, the threshold management register 22a is updated in consideration of the history information of the operation related to the determination of the deletion target data file set by the user stored in the deletion history information management table 22c.

  For example, in the deletion target data file set determination deletion step S24 or S48, the deletion execution unit 22 deletes the maximum value of the free space of the data memory 12 secured by deleting the deletion target data file set in order to respond to the new storage request. It is set as a predetermined threshold value. If the processing start condition is set so that the free capacity is periodically larger than the predetermined threshold value in the processing start condition conformity determination step S22, most new storage requests are answered in the new data capacity confirmation step S40. Shifts to the empty capacity confirmation step S44 (No branch), and in the empty capacity confirmation step S44, the process proceeds to the new data file storage step S50 (No branch).

  Therefore, the cellular phone according to the fourth embodiment has the same effect as the cellular phone according to the third embodiment, and deletes an existing data file after a new save request occurs for most new save requests. The effect is that the new data file can be saved immediately.

Embodiment 5 FIG.
FIG. 11 is a block diagram showing a mobile phone which is a mobile device according to Embodiment 5 of the present invention, and components having the same reference numerals as those in FIG. 9 are the same or equivalent. The difference between the mobile phone according to the fifth embodiment shown in FIG. 11 and the mobile phone according to the fourth embodiment shown in FIG. 9 is that the deletion candidate selection unit 20 of the mobile phone according to the fifth embodiment stores the deletion history information management table 22c. The stored information is used for creating and updating the deletion candidate management table 20c.

  The operation of the mobile phone according to the fifth embodiment will be described with reference to the flowchart shown in FIG. The process from the start of the operation to the deletion candidate management table update step S28 is the same as in the fourth embodiment. In the deletion candidate management table update step S28, the deletion target data by the user stored in the deletion history information management table 22c. The deletion candidate management table 20c is updated in consideration of operation history information related to the determination of the file set. Specifically, in the deletion target data file set determination deletion step S24 or S48, the deletion execution unit 22 selects a plurality of deletion candidate data file sets based on the deletion candidate management table 20c and displays them on the liquid crystal display 16. A deletion candidate including an existing data file that is an element of the deletion candidate data file set excluded by the user when the user operates the key matrix 18 to determine the deletion target data file set. Adjust the deletion candidate rank of the data file set to be lower.

  The mobile phone according to the fifth embodiment has the same effect as the mobile phone according to the fourth embodiment, and reflects the user's intention when actually determining the data file set to be deleted, and the deletion candidate management table 20c. The existing data file that the user does not want to delete is less likely to be selected as an element of the deletion target data file set that is higher in the deletion candidate order, and the operation to secure the free space of the data memory is performed. It is also possible to expect an effect of making it simpler and preventing an erroneous operation that erroneously deletes an existing data file that the user does not want to delete.

  Although the first to fifth embodiments have been described with respect to the mobile phone, the same effect can be obtained with a mobile device having a data file storage unit for storing a data file.

It is a block diagram which shows the portable apparatus by Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the portable apparatus by Embodiment 1 of this invention. It is a figure explaining the method to select the deletion candidate data file set in the portable apparatus by Embodiment 1 of this invention. It is a table | surface which shows the example of a deletion candidate data file set in the portable apparatus by Embodiment 1 of this invention. It is a block diagram which shows the portable apparatus by Embodiment 2 of this invention. It is a flowchart which shows operation | movement of the portable apparatus by Embodiment 2 of this invention. It is a block diagram which shows the portable apparatus by Embodiment 3 of this invention. It is a flowchart which shows operation | movement of the portable apparatus by Embodiment 3 of this invention. It is a block diagram which shows the portable apparatus by Embodiment 4 of this invention. It is a flowchart which shows operation | movement of the portable apparatus by Embodiment 4 of this invention. It is a block diagram which shows the portable apparatus by Embodiment 5 of this invention.

Explanation of symbols

12 data file storage unit, 20 deletion candidate selection unit, 22 deletion execution unit.

Claims (9)

A data file storage unit for storing at least one data file to set the empty capacity target value, 2 or more existing large air capacity than the free capacity target value is reserved in the data file storage unit by being deleted A deletion candidate selection unit that creates at least one deletion candidate data file set that is a set of data files in advance, and a free space in the data file storage unit that is smaller than a predetermined threshold and satisfies a predetermined processing start condition And a deletion execution unit for deleting the data file constituting the deletion candidate data file set corresponding to the empty capacity target value equal to or greater than the predetermined threshold created by the deletion candidate selection unit from the data file storage unit. A storage device. The deletion candidate selection unit creates deletion candidate data file sets with priorities of deletion candidates determined based on the attributes of the data file, and the deletion execution unit configures one of the deletion candidate data file sets. The storage device according to claim 1, wherein the data file to be deleted is deleted from a data file storage unit. 2. The storage according to claim 1, wherein if the capacity of a data file newly stored in the data file storage unit is larger than a predetermined threshold, the predetermined threshold is changed to a value equal to or larger than the data capacity of the data file. machine. 2. The storage device according to claim 1, wherein the predetermined processing start condition is when a data file larger than an empty capacity of the data file storage unit is stored in the data file storage unit. 2. The storage device according to claim 1, wherein the predetermined processing start condition is when the free capacity of the data file storage unit falls below a predetermined threshold. The storage device according to claim 1, wherein the deletion candidate selection unit selects a deletion candidate data file set when a data file of the data file storage unit is newly stored or deleted. 3. The storage device according to claim 2, wherein the deletion candidate selection unit determines the priority order of the deletion candidates based on the attribute of the data file and the deletion history in the deletion execution unit. 2. The storage device according to claim 1, wherein the deletion candidate selection unit sets two or more empty capacity target values and creates a deletion candidate data file set corresponding to each of the empty capacity target values. The storage device according to claim 2, wherein the deletion candidate selection unit determines a priority of deletion candidates using a predetermined evaluation function.

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