JP4937811B2 - Mobile terminal device - Google Patents

Description

  The present invention relates to web page download control in a portable terminal device that can use two networks, a wireless LAN communication network and a mobile communication network.

The prior art is characterized in that cache data is used when the network is unavailable (see Patent Document 1). However, at present, there are portable terminal devices having a function capable of connecting to both the mobile communication network and the wireless LAN communication network.
JP 2000-148572 A

  However, in a conventional mobile terminal device, when trying to download a Web page, there is a problem that the mobile communication network is slower than the wireless LAN communication network and the cost of packet charges is high.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a mobile terminal device capable of browsing a Web page at low cost.

In order to solve the above problems, a mobile terminal device according to the present invention is a mobile terminal device comprising a communication means compliant with a communication standard and connectable to a communication network connected to the Internet, wherein the communication means is the communication network. Determining means for determining whether or not the user is in the communication range, a cache table storing automatic download date and time and an automatic download cycle for each URL of a pre-registered Web page, and automatic download for each Web page in the cache table Based on the date and time and the automatic download cycle, the Web page search means for searching the cache table for a Web page to be automatically downloaded, and the Web page downloaded this time are updated compared to the Web page downloaded last time. Update detection means for detecting whether or not A cache memory for storing information on the loaded web page and the web page search unit through the communication network when the discrimination unit determines that the communication unit is within the communication range of the communication network. The web page is downloaded using the communication means, and the web page acquisition means for updating the cache memory for the web page whose update is confirmed by the update detection means, and the cache by the web page acquisition means. When the memory is updated, an automatic download date and time update unit that updates the automatic download date and time of the Web page, and when an update of the Web page is detected by the update detection unit, an HTTP response header (Last- (Modified) and the current time, Out if the result is equal to or more than a predetermined time, characterized in that it comprises a download period shortening means for the automatic download period resetting short as ΔT of the Web page.

Further, the mobile terminal device according to the present invention is a mobile terminal device comprising a communication means that can be connected to a communication network connected to the Internet in accordance with a communication standard , and whether or not the communication means is within a communication range of the communication network. A cache table that stores automatic download date and time and an automatic download cycle for each URL of a Web page registered in advance, and an automatic download date and time and an automatic download cycle for each Web page in the cache table. Based on the web page search means for searching the cache table for a web page to be automatically downloaded, and whether the currently downloaded web page is updated as compared to the previously downloaded web page. Update detection means for downloading and downloaded Web A cache memory that stores information on a page, and the Web searched by the Web page search means via the communication network when the determination means determines that the communication means is within the communication range of the communication network. A page download is performed using the communication unit, and a Web page acquisition unit that updates the cache memory for a Web page whose update is confirmed by the update detection unit, and the cache memory is updated by the Web page acquisition unit Is performed, an automatic download date and time updating means for updating the automatic download date and time of the Web page, and when an update of the Web page is detected by the update detection means, an HTTP response header (Last-Modified) is displayed. Determine whether it exists, and respond to the HTTP If Suhedda (Last-Modified) is absent, characterized in that it comprises a download period shortening means for the automatic download period resetting short as ΔT of the Web page.

Further, in the mobile terminal device, the cache table further stores a priority for each URL of the Web page registered in advance, the number of accesses, and the last access date and time, and the Web page search means stores the Web page in the cache table. It is preferable to search the cache table for a Web page that should be automatically downloaded based on the last access date / time, automatic download date / time, and automatic download cycle .

The portable terminal device is a second communication network different from the communication network to which the communication means can be connected, and is connected to the second communication network connected to the Internet in accordance with a communication standard. 2 communication means, second determination means for determining whether or not the second communication means is within the communication range of the second communication network, and the communication means by the determination means When it is determined that the user is outside the service area, and the second communication unit determines that the second communication unit is within the communication range of the second communication network, the user uses the second communication unit in advance. The web page searched by the web page search means via the second communication network is downloaded using the second communication means and updated by the update detection means. Confirmed We For a page, when the cache memory is updated by a second Web page acquisition unit that updates the cache memory and the second Web page acquisition unit, the automatic download date and time of the Web page is updated. And a second automatic download date and time updating means .

In the portable terminal device, when the cache memory is updated by the Web page acquisition unit or the second Web page acquisition unit, the remaining capacity of the cache memory is detected and the cache memory is updated. First cache capacity detecting means for detecting whether or not the capacity of the cache memory is insufficient, and when the cache capacity of the cache memory is detected to be insufficient by the first cache capacity detecting means, the cache Referring to the table, detects a web page whose last access date and time has exceeded a predetermined time, deletes the cache information and cache table information of the web page, and the last access date and time has passed in the cache table for a predetermined time If no active Web page is detected, the lowest priority Web page A first cache allocation means for deleting the cache information and the cache table information over di preferably comprises a.

Further, in the portable terminal device, an access detecting means for detecting that there is an access request for the Web page by the user, the access request for a Web page by the user by the access detection means is detected, the communication unit by said discrimination means but if it is determined that are in communication range of the communication network, and download the Web page via the communication network, the Web page the update has been confirmed by the update detecting unit, updating of the cache memory A third Web page acquisition unit; a first access update unit that updates the number of accesses and the last access date and time when the cache memory is updated by the third Web page acquisition unit; and the download First web page display means for displaying the rendered web page. It is preferable.

In the mobile terminal device, the determining unit determines that the communication unit is outside the communication area of the communication network , and the second determining unit determines that the second communication unit is connected to the second communication network. When it is determined that the user is within the communication range, the second Web page display unit that displays a screen prompting the update together with the cached Web page, and the content displayed by the second Web page display unit An update request detecting means for detecting whether or not the update request is received from the user, and when the update request detecting means detects that there is an update request for the Web page from the user, the second The web page is downloaded via the communication network of the first and the cache memory is updated for the web page whose update is confirmed by the update detection means. And a second access update means for updating the access count and the last access date and time when the cache memory is updated by the fourth Web page acquisition means. preferable.

In the mobile terminal device, the determining unit determines that the communication unit is outside the communication area of the communication network , and the second determining unit determines that the second communication unit is connected to the second communication network. It is preferable to include third web page display means for displaying the cached web page when it is determined that the user is out of the communication range.

  In the mobile terminal device, when the cache memory is updated by the third or fourth Web page acquisition unit, the remaining capacity of the cache memory is detected, and the capacity for updating the cache memory is not available. A second cache capacity detecting unit for detecting whether or not the cache memory is insufficient; and when the second cache capacity detecting unit detects that the capacity of the cache memory is insufficient, the cache table is referred to And detecting a Web page whose last access date and time has passed a predetermined time or more, deleting the cache information and cache table information of the Web page, and the last access date and time has passed in the cache table for a predetermined time or more. If no web page is detected, the cache information of the web page with the lowest priority is displayed. And it is preferable to provide a second cache allocation means for deleting the cache table information.

  ADVANTAGE OF THE INVENTION According to this invention, the portable terminal device which can browse a web page at low cost can be provided.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In the following, a mobile phone will be described as a mobile terminal device, but the present invention is not limited to this, and may be a PHS (Personal Handy Phone System), a PDA (Personal Digital Assistant), a portable navigation device, a laptop computer, or the like. There may be.

  The basic structure of the mobile phone 1 will be described with reference to FIGS. FIG. 1 shows a front view of the mobile phone 1 in the opened state (first open state). 2A shows a left side view when the mobile phone 1 is opened, and FIG. 2B shows a right side view when the mobile phone 1 is opened. FIG. 3 shows a rear view in a state where the mobile phone 1 is opened.

  The mobile phone 1 includes an operation unit side body 2 and a display unit side body 3. The operation unit side body 2 and the display unit side body 3 are connected to each other via a connection unit 4 having a biaxial hinge mechanism, and the mobile phone 1 can be deformed into an open state and a closed state. In each closed state, the display unit side body 3 can be switched between a front state and a back state.

  Here, the closed state is a state in which both housings are arranged so as to overlap each other, and the open state is a state in which both housings are arranged so as not to overlap each other. In the open state, the display 30 disposed on the surface 3A of the display unit side body 3 to be described later and the operation key group 11 disposed on the front case 2a of the operation unit side body 2 are the same. The back state is a state in which the display 30 in the display unit side body 3 and the operation key group 11 in the operation unit side body 2 are disposed to face opposite sides. Say. Further, the front state in the closed state is a state in which the display 30 in the display unit side body 3 is arranged so as to face the operation key group 11 in the operation unit side body 2, and the back state in the closed state is In this state, the display 30 in the display unit side body 3 is exposed without facing the operation key group 11 in the operation unit side body 2.

  The outer surface of the operation unit side body 2 includes a front case 2a and a rear case 2b. The operation unit side body 2 exposes the operation key group 11 and the voice input unit (microphone) 12 to which the voice uttered by the user of the mobile phone 1 is input on the front case 2a side. Configured. Here, the operation key group 11 includes a function setting operation key 13 for operating various functions such as various settings, a telephone book function, and a mail function, and an input for inputting numbers of telephone numbers, characters such as mails, and the like. An operation key 14 and a determination operation key 15 for performing determination in various operations, scrolling in the up / down / left / right directions, and the like are configured. The microphone 12 is disposed on the outer end side opposite to the connecting portion 4 side in the longitudinal direction of the operation unit side body 2. That is, the microphone 12 is disposed on one outer end side when the mobile phone 1 is in the open state.

  Each key constituting the operation key group 11 is predetermined according to a deformed state such as an open / close state or a front / back state of the operation unit side body 2 and the display unit side body 3 and the type of application being activated. Function is assigned (key assignment). In the mobile phone 1, when each key constituting the operation key group 11 is pressed by the user, an operation corresponding to the function assigned to each key is executed.

  As shown in FIG. 2A, on one side surface of the operation unit side body 2, an interface 16 for transmitting / receiving data to / from an external device (for example, a host device), a headphone / microphone terminal 17, A removable external memory interface 18 and a charging terminal 19 for charging the battery are provided. The interface 16, the headphone terminal / microphone terminal 17, and the interface 18 are covered with a dust-proof cap that can be attached and detached when not in use.

  On the other side of the operation unit side body 2, as shown in FIG. 2B, a pair of side keys 20, an operation key 21 used at the time of imaging, and a broadcast wave whose radio wave reception angle can be adjusted. A receiving antenna 22 is arranged. A predetermined function is assigned to the side key 20 in accordance with a deformed state such as an open / close state and a front / back state of the operation unit side body 2 and the display unit side body 3 and the type of the activated application ( Key assignment). Here, similarly to the above, when the side key 20 is pressed by the user, an operation corresponding to the function assigned to the side key 20 in the mobile phone 1 is executed.

  As shown in FIG. 3, a camera unit 23 that captures an image of a subject and a light unit 24 that irradiates the subject with light are disposed in the rear case 2 b of the operation unit side body 2. The camera unit 23 and the light unit 24 are arranged on the connection unit 4 side in the operation unit side body 2. In addition, the rear case 2b in the operation unit side body 2 has an opening for mounting the battery in a battery housing portion, which will be described in detail later, and a battery lid 25 is disposed so as to close the opening. Is done.

  Moreover, the upper end part of the operation part side housing | casing 2 and the lower end part of the display part side housing | casing 3 are connected via the connection part 4 provided with a biaxial hinge mechanism, as shown in FIGS. As shown in FIG. 3, the sub operation key group 33 is arranged in a line in the width direction (short direction) of the mobile phone 1 on one surface (back surface) of the connecting portion 4. Each of the keys constituting the sub operation key group 33 depends on a deformed state such as an open / closed state or a front / back state of the operation unit side body 2 and the display unit side body 3 and the type of application being activated. A predetermined function is assigned (key assignment). In the mobile phone 1, when each key constituting the operation key group 11 is pressed by the user, an operation corresponding to the function assigned to each key is executed.

  Further, the display unit side body 3 is configured by a front case 3a and a rear case 3b on the outer surface. As shown in FIG. 1, a display 30 having a predetermined shape for displaying various information and a sound output unit 31 for outputting sound on the other party side of the call are exposed on the front case 3 a in the display unit side body 3. To be arranged. Here, the audio output unit 31 is disposed on the outer end side opposite to the connection unit 4 in the longitudinal direction of the display unit side body 3. That is, the audio output unit 31 is arranged on the other end side when the mobile phone 1 is in the open state.

  Further, as shown in FIG. 3, a sub-display 32 for displaying various types of information is disposed in the rear case 3 b of the display unit side body 3 so as to be exposed. Each of the display 30 and the sub-display 32 includes a liquid crystal panel, a drive circuit that drives the liquid crystal panel, and a light source unit such as a backlight that emits light from the back side of the liquid crystal panel.

  In the present embodiment, the cellular phone 1 that can be folded by the connecting portion 4 is described. However, the cellular phone 1 is not foldable, and the operation unit side body 2 and the display unit side body 3 are overlapped. One of the casings is slid in one direction, or one of the casings is rotated about an axis along the direction in which the operation unit side casing 2 and the display unit side casing 3 overlap. A rotating type (turn type), or a type (straight type) in which the operation unit side body 2 and the display unit side body 3 are arranged in one housing and does not have a connecting portion may be used.

  Next, each function of the mobile phone 1 will be described with reference to the functional block diagram of FIG. As shown in FIG. 4, the mobile phone 1 includes a first communication unit (first communication means) 100 capable of communicating with a wireless LAN communication network that is a communication network compliant with the first communication standard, A second communication unit (second communication unit) 200 capable of communicating with a mobile communication network, which is a communication network compliant with a communication standard, and a processing unit 201 that performs predetermined processing are provided. The battery 90 supplies power to the first communication unit 100, the second communication unit 200, and the processing unit 201. In addition, the CPU 202 and the Web page download processing control microcomputer 300 cooperate with each other to perform predetermined control on the first communication unit 100, the second communication unit 200, and the processing unit 201.

  The first communication unit 100 communicates by telephone or mail with another communication terminal device via a base station based on a predetermined communication method (compliant with a wireless LAN, for example, IEEE 802.11). And an antenna unit 81 that downloads a Web page having a predetermined URL from the Internet, and a communication processing unit 101 including a transmission circuit and a reception circuit (not shown).

  In addition, the second communication unit 200 communicates with other communication terminal devices via a base station based on a predetermined communication method (mobile communication network, for example, CDMA (Code Division Multiple Access) 2000_1x or the like). Communication processing composed of an antenna unit 80 (main antenna) that performs communication by telephone or mail, download of a Web page having a predetermined URL from the Internet, and a transmission circuit and a reception circuit (not shown) Unit 203.

  The processing unit 201 includes an operation key group 11, a microphone 12, a display 30, a sound output unit 31, a memory 204 in which predetermined data is stored, and a sound processing unit 205 that performs predetermined sound processing. An image processing unit 206 that performs predetermined image processing, a camera unit 23 that captures an image of a subject, a speaker 207 that outputs a ringtone, and the like.

  Next, the configuration of the web page download processing control microcomputer 300 that performs web page download control in the mobile phone 1 that can use the two systems of the present invention (wireless LAN communication network and mobile communication network) will be described.

  As shown in FIG. 5, the Web page download processing control microcomputer 300 includes at least a control unit 301, a calculation unit 302, a memory unit (a cache memory 303 including a cache table, a ROM 304, and a work RAM 305), and input / output means. (Not shown), and the calculation unit 302 functions as various functional units described above or below.

  The calculation unit 302 includes, as functional units, a first determination unit 306, a second determination unit 307, a Web page search unit 308, an update detection unit 309, a first Web page acquisition unit 310, and a second Web page acquisition unit. 311, third Web page acquisition unit 312, fourth Web page acquisition unit 313, first automatic download date update unit 314, second automatic download date update unit 315, first cache capacity detection unit 316, 2 cache capacity detecting means 317, first cache securing means 318, second cache securing means 319, download cycle extending means 320, download cycle shortening means 321, access detecting means 322, update request detecting means 323, first Access update means 324, second access update means 325, first web page Di display unit 326, the second Web page display means 327 comprises a third Web page display means 328.

  The control unit 301 controls the entire Web page download processing control microcomputer 300 according to a program stored in the ROM 304. The cache memory 303 stores a cache table described later and a downloaded web page. The ROM 304 stores a program for performing web page download processing. The work RAM 305 is a storage area temporarily used by the control unit 301 and the calculation unit 302 when executing the program.

  The first determination unit 306 determines whether or not the first communication unit (the first communication unit 100) is within the communication range of the first communication network based on, for example, the electric field strength. The second determination unit 307 determines whether or not the second communication unit (second communication unit 200) is within the communication range of the second communication network based on, for example, the electric field strength.

  The cache table included in the cache memory 303 stores the priority order, the number of accesses, the last access date, the automatic download date, and the automatic download cycle for each URL of the Web page registered in advance (described later).

  The web page search means 308 searches the cache table for a web page that should be automatically downloaded based on the last access date / time, automatic download date / time and automatic download cycle for each web page in the cache table.

  The update detection unit 309 confirms whether or not the Web page to be downloaded this time is updated as compared with the previously downloaded Web page. This confirmation is confirmed by the update detection means 309 based on the information about the presence / absence of the update that is sent as a reply to the <If-Modified-Since> of the Get request.

  The first web page acquisition unit 310, when the first discrimination unit 306 determines that the first communication unit is within the communication range of the first communication network, the web page via the first communication network. The Web page searched by the search unit 308 is downloaded using the first communication unit, and the Web page whose update is confirmed by the update detection unit 309 is written (updated) into the cache memory. The second Web page acquisition unit 311 determines that the first determination unit 306 determines that the first communication unit is outside the communication area of the first communication network, and the second determination unit 307 determines the second communication unit. However, if it is determined that the user is within the communication area of the second communication network, the Web page search means 308 is transmitted via the second communication network only when the user is permitted in advance to use the second communication means. The Web page retrieved by the above is downloaded using the second communication unit, and the Web page whose update is confirmed by the update detection unit 309 is written (updated) into the cache memory 303.

  In the third Web page acquisition unit 312, the access detection unit 322 detects a Web page access request by the user, and the first determination unit 306 detects that the first communication unit is within the communication range of the first communication network. If it is determined, the Web page is downloaded via the first communication network, and the Web page whose update is confirmed by the update detection unit 309 is written (updated) into the cache memory 303. The fourth web page acquisition unit 313 downloads the web page via the second communication network when the update request detection unit 323 detects that there is a web page update request from the user. The Web page whose update has been confirmed by the update detection unit 309 is written (updated) into the cache memory 303.

  When the first web page acquisition unit 310 updates the cache memory 303, the first automatic download date and time update unit 314 updates the automatic download date and time of the web page. The second automatic download date and time update unit 315 updates the automatic download date and time of the Web page when the cache memory 303 is updated by the second Web page acquisition unit 311.

  The first cache capacity detection unit 316 detects the remaining capacity of the cache memory 303 when the first or second Web page acquisition unit 310 or 311 updates the cache memory 303, and updates the cache memory 303. It is detected whether or not the capacity for performing is insufficient. The second cache capacity detection unit 317 detects the remaining capacity of the cache memory 303 when the third or fourth Web page acquisition unit 312 or 313 updates the cache memory 303, and updates the cache memory 303. It is detected whether or not the capacity for performing is insufficient.

  When the first cache capacity detecting unit 316 detects that the capacity of the cache memory 303 is insufficient, the first cache securing unit 318 refers to the cache table and the last access date and time has passed a predetermined time or more. If the Web page is detected, the cache information and the cache table information of the Web page are deleted, and a Web page whose last access date has exceeded a predetermined time is not detected in the cache table, the priority order The cache information and cache table information of the lowest Web page is deleted. When the second cache capacity detecting unit 317 detects that the capacity of the cache memory 303 is insufficient, the second cache securing unit 319 refers to the cache table and the last access date and time has passed a predetermined time or more. If the Web page is detected, the cache information and the cache table information of the Web page are deleted, and a Web page whose last access date has exceeded a predetermined time is not detected in the cache table, the priority order The cache information and cache table information of the lowest Web page is deleted.

  When the update detection unit 309 does not detect the update of the Web page, the download cycle extension unit 320 resets the Web page automatic download cycle so that it is increased by ΔT. When the update detection unit 309 detects the update of the Web page, the download cycle shortening unit 321 calculates the difference between the HTTP response header (Last-Modified) and the current time, and the calculation result is equal to or longer than a predetermined time. In such a case, the automatic download cycle of the Web page is reset so as to be shortened by ΔT. If the HTTP response header <Last-Modified> does not exist, the download cycle shortening unit 321 resets the updated Web page automatic download cycle to be shortened by ΔT.

  The access detection means 322 detects that there has been a web page access request from the user. The update request detection unit 323 detects whether there is an update request from the user based on the content displayed by the second Web page display unit 326.

  When the cache memory 303 is updated by the third Web page acquisition unit 312, the first access update unit 324 updates the access count and the last access date / time. When the cache memory 303 is updated by the fourth Web page acquisition unit 313, the second access update unit 325 updates the access count and the last access date and time.

  The first web page display means 326 outputs the display output of the downloaded web page to the display 30. The second web page display means 327 determines that the first communication means is outside the communication area of the first communication network by the first determination means 306, and the second communication means 307 determines the second communication means. However, if it is determined that the user is within the communication range of the second communication network, a screen display that prompts an update is performed together with the cached Web page. The third Web page display means 328 determines that the first communication means is outside the communication area of the first communication network by the first determination means 306, and the second communication means 307 determines the second communication means. However, if it is determined that the user is out of the communication range of the second communication network, the cached Web page is displayed.

  FIG. 6 shows a ladder chart of Web page download according to the state of the wireless LAN communication network / mobile communication network, showing the basic operation of the present invention.

  As shown in FIG. 6, when connection to a wireless LAN communication network is possible, the mobile phone (mobile terminal device) 1 makes a web page data request every automatic download cycle that differs depending on each web page or by a user operation. This is performed for the wireless LAN communication network, and Web page data is downloaded from the wireless LAN communication network.

  When the connection to the wireless LAN communication network is not possible and the connection to the mobile communication network is possible, the mobile terminal device makes a web page data request to the cache memory in the mobile terminal device and stores it in the cache memory The obtained web page data is acquired. When the displayed web page has passed the automatic download cycle and a web page update operation is performed automatically or by a user operation, a web page data request is made to the mobile communication network to move the web page. Web page data is downloaded from the body communication network.

  When the connection with the wireless LAN communication network and the mobile communication network is impossible, only the Web page data stored in the cache memory is displayed.

  Next, a configuration example of the cache table will be described with reference to FIG. As already described, the cache table is provided in the cache memory 303. For each URL of the web page, the number of accesses (web page by user operation), the last access date (web page by user operation), automatic download date, automatic download cycle, and priority (n is a natural number) are stored. ing.

  Note that the priority is higher as the number of accesses is larger, and when the number of accesses is the same, the newest last access date is determined to be higher.

  Next, details of the Web page download process of the present invention will be described with reference to the flowcharts of FIGS.

  8 is a flowchart showing the Web page automatic update processing operation, FIG. 9 is a flowchart showing the cache securing processing operation, FIG. 10 is a flowchart showing the automatic download cycle update processing operation, and FIG. 11 is the user access. 5 is a flowchart showing a Web page display processing operation by Here, the flowchart showing the web page automatic update processing operation in FIG. 8 and the flowchart showing the web page display processing operation by user access in FIG. 11 operate in parallel in the control microcomputer 300 for web page download processing (multiple The cache table to be referred to and the cache memory storing the Web page data are the same.

  First, the Web page automatic update processing flowchart of FIG. 8 will be described. First, the mobile phone (mobile terminal device) 1 refers to the cache table, and the elapsed time from the latest date / time or the latest date / time of the automatic download date / time to the current date / time is determined as an automatic download cycle (time). The web page with the highest priority is searched from the web pages that have passed above (step S1).

  Then, it is checked whether or not the corresponding Web page exists (step S2). If there is no corresponding Web page, after waiting for a predetermined time (step S12), the process proceeds to step S1.

  If there is a corresponding Web page, the process moves to step S3, where it is checked whether the wireless LAN communication network is currently within the communication area or out of the communication area. If it is determined that the user is outside the communication range, the process proceeds to step S13. If it is determined that the user is within the communication range, the process proceeds to step S4. In step S4, it is checked whether or not the Web page to be downloaded has been changed (updated) compared to the previously downloaded Web page. If it is determined that it has not been updated, the process proceeds to processing step S11. If it is determined that it has been updated, the process proceeds to step S5.

  In step S5, the Web page is downloaded using the wireless LAN communication network, and the process proceeds to step S6. In step S6, when the downloaded web page is written (updated) in the cache memory 303, it is checked whether or not the cache memory 303 is insufficient.

  If it is determined in step S6 that no cache shortage will occur, the process proceeds to step S8, and if it is determined that a cache shortage will occur, the process proceeds to step S7 and a cache securing process (described later). ) And the process proceeds to step S8.

  In step S8, the cache memory is updated, the automatic download date / time is updated (step S9), the cache table is sorted (rearrangement in accordance with the change in the priority order) (step S10), and the automatic download cycle is updated. An update process (described later) is performed (step S11), and the process proceeds to step S1.

  On the other hand, in step S13, it is checked whether or not the mobile communication network is currently in the communication range. If it is determined that the mobile communication network is out of the communication range, after waiting for a predetermined time (step S14), the process proceeds to step S1. If it is determined that it is within the vicinity, the process proceeds to step S15.

  When the process proceeds to step S15, the user checks in advance whether or not the download of the Web page from the mobile communication network is prohibited. If the download is prohibited, after waiting for a predetermined time (step S16), the step If the process proceeds to S1 and it is determined that the process is not prohibited, the process proceeds to step S4, and a web page is downloaded using the mobile communication network.

  Next, the cache securing process in step S7 will be described with reference to the flowchart showing the cache securing process operation in FIG.

  First, in step S20, the cache table is referred to and it is checked whether or not there is a Web page whose last access date and time has passed a predetermined period or more. If it is determined that it does not exist, the process proceeds to step S21, the cache information (downloaded web page data) and cache table information of the Web page with the lowest priority are deleted, and the process ends.

  On the other hand, if it is determined in step S20 that there is a Web page for which the last access date and time has passed for a predetermined period or longer, the process proceeds to step S22, and the Web page for which the last access date and time has passed for a predetermined period or more is determined. If it is determined that there is only one, the process proceeds to step S24. If it is determined that there is a plurality, the process proceeds to step S23, and the lowest priority is given. A search for a Web page is performed, and the process proceeds to step S24.

  In step S24, the cache information and cache table information of the corresponding Web page are deleted, and the process ends.

  Next, the automatic download cycle update process of step S11 will be described with reference to the flowchart showing the automatic download cycle update process operation of FIG.

  First, in step S30, it is checked whether or not the corresponding web page has been updated. If it is determined that the web page has been updated, the process proceeds to step S31. If it is determined that the web page has not been updated, the process is performed. In step S35, the automatic download cycle is updated so that the automatic download cycle becomes longer by ΔT (however, the automatic download cycle is set to a predetermined upper limit value or less), and the process is terminated.

  In step S31, it is determined whether an HTTP response header (Last-Modified) exists. If it is determined that the HTTP response header <Last-Modified> does not exist, the process proceeds to step S34. If there is an HTTP response header <Last-Modified>, the process proceeds to step S32. In step S32, the difference between the HTTP response header <Last-Modified> and the current time is calculated, and in step S33, it is checked whether the calculation result is equal to or longer than a predetermined time. If it is determined that the calculation result is not equal to or longer than the predetermined time, the process is terminated. If it is determined that the calculation result is equal to or longer than the predetermined time, the process proceeds to step S34. In step S34, the automatic download cycle is updated so that the automatic download cycle is shortened by ΔT (however, the automatic download cycle is set to a predetermined lower limit value or more), and the process is terminated.

  Next, Web page display processing by user access will be described with reference to a flowchart showing Web page display processing operation by user access in FIG.

  First, in step S40, it is checked whether or not there is a web page access request from the user. If it is determined that there is no access request, the process returns to step S40. If it is determined that there is an access request, the process proceeds to step S41.

  When the process proceeds to step S41, it is checked whether the wireless LAN communication network is currently in the communication area or out of the communication area. If it is determined that the user is outside the communication range, the process proceeds to step S52. If it is determined that the user is within the communication range, the process proceeds to step S42. In step S42, it is checked whether or not the Web page to be downloaded has been changed (updated) compared to the previously downloaded Web page. If it is determined that it has not been updated, the process proceeds to step S51. If it is determined that it has been updated, the process proceeds to step S43.

  In step S43, the web page is downloaded using the wireless LAN communication network, and the process proceeds to step S44. In step S44, when the downloaded Web page is written (updated) in the cache memory 303, it is checked whether or not the cache memory 303 is insufficient.

  If it is determined in step S44 that a cache shortage does not occur, the process proceeds to step S46. If it is determined that a cache shortage occurs, the process proceeds to step S45, and a cache securing process (FIG. 9), and the process proceeds to step S46.

  When the process proceeds to step S46, the cache memory is updated, and the process proceeds to step S47.

  When the process proceeds to step S47, it is checked whether or not the URL of the Web page to be updated exists in the cache table. If it is determined that the URL exists, the process proceeds to step S49, and if it does not exist, the cache is cached. The URL is added to the table (step S48), and the process proceeds to step S49.

  In step S49, the number of accesses and the last access date and time on the web page on the cache table are updated, the cache table is sorted (step S50), and the web page is displayed on the display 30 (step S51). The process returns to step S40.

  On the other hand, in step S52, it is checked whether or not the mobile communication network is currently in the communication range. If it is determined that the mobile communication network is out of the communication range, the cached web page is displayed on the display 30 (step S53). The process proceeds to step S40, and if it is determined that the communication area is within the communication range, the process proceeds to step S54.

  When the process proceeds to step S54, a screen display that prompts the updating (downloading) of the web page is performed together with the cached web page, and the process proceeds to step S55.

  When the process proceeds to step S55, it is checked whether or not there has been a web page update request from the user. If it is determined that there is no update request, the process proceeds to step S40 to determine that there has been an update request. If so, the process moves to step S42, and the web page is downloaded using the mobile communication network.

  As described above, the present invention has the following effects.

  By downloading a Web page when the wireless LAN is valid as much as possible with a portable terminal device that can access different networks of the mobile communication network and the wireless LAN communication network, the cost of the packet can be reduced at high speed. It also leads to effective use of mobile communication network frequencies. Furthermore, useless connection to the network is reduced by having a function for adjusting the period when automatic downloading is performed.

  Further, the cache can be effectively used by erasing the data of the Web page having a low access frequency based on the access frequency including the download count and date / time of a predetermined Web page.

  In addition, by adding periodic data to a Web page to be downloaded and making this periodic data updatable, it is possible to download a Web page with excellent cost performance.

  That is, according to the present invention, Web pages (programs, bulletin boards, etc.) that are regularly updated are automatically registered at predetermined intervals when a web page (prog, bulletin board, etc.) is registered in advance in the wireless LAN communication network area or frequently accessed. Downloaded to the device, stored in the cache memory, and displays the data stored in the cache memory when outside the wireless LAN communication network area, and within the mobile communication network area outside the wireless LAN communication network area If it is necessary to re-download, if the elapsed time since the last download of the Web page has exceeded the set time, the mobile communication network is used. To provide a portable terminal device capable of browsing the latest Web page at any time at a low cost by downloading. Kill.

The front view in the state (1st open state) which opened the mobile telephone is shown. (A) The left view in the state which opened the mobile phone is shown, (B) The right view in the state which opened the mobile phone is shown. The rear view in the state which opened the mobile telephone is shown. It is a block diagram which shows the function of the mobile telephone which concerns on this invention. It is a figure for demonstrating the structure of the control microcomputer for a web page download process. It is a ladder chart of the Web page download by the state of a wireless LAN communication network and a mobile communication network which shows the basic operation | movement of this invention. It is the figure which showed an example of the cache table. It is a flowchart which shows the automatic update process operation of a web page. It is a flowchart which shows a cache securing process operation. It is a flowchart which shows an automatic download period update process operation. It is a flowchart which shows the web page display processing operation by a user access.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile telephone 2 Operation part side housing | casing 2a, 3a Front case 2b, 3b Rear case 3 Display part side housing | casing 4 Connection part 11 Operation key group 12 Microphone 23 Camera part 30 Display 31 Audio | voice output part 80, 81 Antenna 100 1st Communication unit 101, 203 communication processing unit 200 second communication unit 201 processing unit 202 CPU
204 Memory 205 Sound Processing Unit 206 Image Processing Unit 207 Speaker 300 Web Page Download Processing Control Microcomputer 301 Control Unit 302 Calculation Unit 303 Cache Memory (Cache Table)
304 Program ROM

Claims (9)

In a mobile terminal device provided with a communication means that can be connected to a communication network that is connected to the Internet in accordance with a communication standard,
Determining means for determining whether or not the communication means is within a communication range of the communication network;
A cache table for storing an automatic download date and time and an automatic download cycle for each URL of a Web page registered in advance;
Web page search means for searching the cache table for a Web page that should be automatically downloaded based on an automatic download date and time and an automatic download cycle for each Web page in the cache table;
Update detection means for detecting whether or not the web page downloaded this time is updated as compared with the web page downloaded last time;
A cache memory for storing information of downloaded web pages;
When the determining means determines that the communication means is within the communication area of the communication network, the communication means is used to download the Web page searched by the Web page searching means via the communication network. Web page acquisition means for updating the cache memory for a Web page whose update has been confirmed by the update detection means;
Automatic download date and time updating means for updating the automatic download date and time of the Web page when the cache memory is updated by the Web page acquisition means;
When an update of the Web page is detected by the update detection unit, a difference between the HTTP response header (Last-Modified) and the current time is calculated, and when the calculation result is a predetermined time or more, the Web page And a download cycle shortening means for resetting the automatic download cycle to be shortened by ΔT. In a mobile terminal device provided with a communication means that can be connected to a communication network that is connected to the Internet in accordance with a communication standard,
Determining means for determining whether or not the communication means is within a communication range of the communication network;
A cache table for storing an automatic download date and time and an automatic download cycle for each URL of a Web page registered in advance;
Web page search means for searching the cache table for a Web page that should be automatically downloaded based on an automatic download date and time and an automatic download cycle for each Web page in the cache table;
Update detection means for detecting whether or not the web page downloaded this time is updated as compared with the web page downloaded last time;
A cache memory for storing information of downloaded web pages;
When the determining means determines that the communication means is within the communication area of the communication network, the communication means is used to download the Web page searched by the Web page searching means via the communication network. Web page acquisition means for updating the cache memory for a Web page whose update has been confirmed by the update detection means;
Automatic download date and time updating means for updating the automatic download date and time of the Web page when the cache memory is updated by the Web page acquisition means;
When an update of the Web page is detected by the update detection unit, it is determined whether or not there is an HTTP response header (Last-Modified), and if there is no HTTP response header (Last-Modified), A mobile terminal device comprising: a download cycle shortening unit that resets the automatic download cycle of the Web page to be shortened by ΔT. The cache table further stores the priority for each URL of the Web page registered in advance, the number of accesses, and the last access date and time,
The Web page search means searches the cache table for a Web page to be automatically downloaded based on a last access date, an automatic download date and an automatic download cycle for each Web page in the cache table. The mobile terminal device according to 1 or 2 . A second communication network different from the communication network to which the communication means can be connected, the second communication means being connectable to the second communication network connected to the Internet in accordance with a communication standard;
Second determination means for determining whether or not the second communication means is within a communication range of the second communication network;
The determining means determines that the communication means is outside the communication area of the communication network, and the second determining means determines that the second communication means is within the communication area of the second communication network. In such a case, only when the use of the second communication unit is permitted in advance by the user, the download of the Web page searched by the Web page search unit via the second communication network is performed. A second web page acquisition unit configured to update the cache memory for a web page that is updated by the update detection unit and is performed using a communication unit;
A second automatic download date and time updating means for updating the automatic download date and time of the Web page when the cache memory is updated by the second Web page acquisition means;
The mobile terminal device according to claim 3 , further comprising: When the cache memory is updated by the Web page acquisition means or the second Web page acquisition means, the remaining capacity of the cache memory is detected and the capacity for updating the cache memory is not insufficient. First cache capacity detecting means for detecting whether or not,
If the first cache capacity detection means detects that the capacity of the cache memory is insufficient, the cache table is referenced to detect a Web page whose last access date has exceeded a predetermined time, If the cache information and the cache table information of the Web page are deleted, and the Web page whose last access date has exceeded a predetermined time is not detected in the cache table, the Web page with the lowest priority is detected. First cache securing means for deleting cache information and cache table information;
The mobile terminal device according to claim 4 , further comprising: Access detecting means for detecting that a user has requested access to a web page;
When the access detecting unit detects a web page access request by the user and the determining unit determines that the communication unit is within the communication area of the communication network, the Web page is downloaded via the communication network. A third web page acquisition unit that updates the cache memory for the web page whose update is confirmed by the update detection unit;
When the cache memory is updated by the third Web page acquisition unit, a first access update unit that updates the access count and the last access date and time;
First web page display means for displaying the downloaded web page;
The portable terminal device according to claim 4 or 5, further comprising a. The determining means determines that the communication means is outside the communication area of the communication network, and the second determining means determines that the second communication means is within the communication area of the second communication network. A second web page display means for displaying a screen prompting the update together with the cached web page,
Update request detection means for detecting whether or not there has been a request for update from a user based on the content displayed by the second web page display means;
When it is detected by the update request detection means that the user has requested to update the web page, the web page is downloaded via the second communication network, and the update is confirmed by the update detection means. A fourth web page acquisition unit that updates the cache memory for the web page
When the cache memory is updated by the fourth Web page acquisition unit, a second access update unit that updates the access count and the last access date and time;
The mobile terminal device according to claim 6 , further comprising: The determining means determines that the communication means is outside the communication area of the communication network, and the second determining means determines that the second communication means is outside the communication area of the second communication network. A third web page display means for displaying the cached web page,
The mobile terminal device according to claim 6 or 7 , further comprising: Whether the remaining capacity of the cache memory is detected and the capacity for updating the cache memory is insufficient when the cache memory is updated by the third or fourth Web page acquisition unit Second cache capacity detection means for detecting
When the second cache capacity detecting means detects that the capacity of the cache memory is insufficient, the cache table is referenced, and a Web page whose last access date is more than a predetermined time is detected, If the cache information and the cache table information of the Web page are deleted, and the Web page whose last access date has exceeded a predetermined time is not detected in the cache table, the Web page with the lowest priority is detected. Second cache securing means for deleting cache information and cache table information;
The mobile terminal device according to claim 7 or 8, characterized in that it comprises a.

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