JP5315862B2 - Server device, client device, and program - Google Patents

Server device, client device, and program Download PDF

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JP5315862B2
JP5315862B2 JP2008221576A JP2008221576A JP5315862B2 JP 5315862 B2 JP5315862 B2 JP 5315862B2 JP 2008221576 A JP2008221576 A JP 2008221576A JP 2008221576 A JP2008221576 A JP 2008221576A JP 5315862 B2 JP5315862 B2 JP 5315862B2
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display
cache
client device
cache data
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JP2010055493A (en
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典夫 遠藤
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カシオ計算機株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To perform display with an excellent operation response even if displaying extremely long data of a Web page or the like while scrolling the data, in a server based computing system. <P>SOLUTION: In this server based computing system, when contents of an input event received from a client device 20 are acquisition requests and when the Web page is a new Web page having a size needing scroll display, the whole of the data of the page is acquired and stored in a scrolling display cache data memory 14c as cache data, and only a data portion corresponding to a display area of the page head is transmitted and transferred to the client device 20 together with its [cache ID] and [display area information], and made to be stored and displayed. By deciding a state that a down-communication environment is excellent, a non-transmitted data portion of the Web page stored as the cache data is preferentially transmitted and transferred to the client device 20, stored, and displayed in conjunction with to a scroll instruction. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

The present invention relates to a server device and the client device.

  In a conventional server-client system, for example, there is a server-based computing system (SBC) in which a desired application program is activated and executed on the server device side by remote operation from the client device. In this SBC system, display drawing data that is processed and updated on the server device side in response to an operation input of the client device is transmitted and transferred from the server device to the client device every time the drawing is updated. As a result, the client device only needs to have a minimum function such as display and input, and resources such as applications are centrally managed by the server device.

  As described above, since the application program is executed on the server device, the SBC system can realize a highly functional computing environment even when the performance of the client device is low.

  On the other hand, in the SBC system, drawing data for display in response to a request from a client device is generated or acquired by a server device, transferred to the client device, and displayed. For this reason, every time the drawing data is updated, if the transfer processing to the client device occurs, the communication frequency and the data amount increase, and it is difficult to improve the operation response of the drawing update as seen from the client device. It is.

Therefore, in the conventional SBC system, the drawing data for display transmitted and transferred from the server device to the client device is stored and stored in the client device, and the drawing data once transmitted and transferred from the server device is repeatedly used. There has been considered a client server system that eliminates the need for transmission, can reduce the load on the server device, and can improve the operation response of drawing update as viewed from the client device (see, for example, Patent Document 1).
JP 2007-065835 A

  In the conventional client-server system, past drawing data once transmitted and stored in the client device can be displayed with good operation response without waiting for re-transmission from the server device. When requesting acquisition of a page and displaying the long page data while scrolling, the page data in the area corresponding to the scroll instruction is transferred to the client device each time the scroll operation is performed. It cannot be displayed with good operation response.

The present invention, even when displaying sends sequentially client device part data of long data, and an object thereof is to enable it to display the operation with good response.

Claim 1 is a server device that executes an application program based on an input event from a client device via a network, generates display information corresponding to the input event, and transmits the display information to the client device. An acquisition data determination means for determining whether or not the data acquired by the program is new data, and the new data acquired by the application program when the acquisition data determination means determines that the data is new data. Cache data storage means for storing the display cache data in association with the identifier, cache data transmission means for transmitting the display cache data stored by the cache data storage means together with the identifier to the client device, and the class When the input event from the ant device is a scrolling input event for the display cache data transmitted by the cache data transmission means, the cache data storage means stores it in association with the transmitted display cache data. Cache identifier transmission means for transmitting an identifier to the client device as display information corresponding to the input event, and the cache data storage means comprises new data acquired by the application program as a plurality of data portions. Display cache data is stored in association with an identifier for each data portion, and the cache identifier transmission unit displays the display cache data in which an input event from the client device is transmitted by the cache data transmission unit. The identifier stored in the cache data storage means in association with the scroll-destination data portion of the transmitted display cache data is displayed in response to the input event. Is transmitted to the client device .

A server device that receives a display request event from a client device via a network and transmits display information based on the display request event to the client device, the display cache comprising a plurality of data portions Cache storage means for storing display information of each data portion of data in association with identification information for identifying the display information, and display information of a part of the data portion of the display cache data in a display request from the client device When transmitting based on the first transmitting means for transmitting the display information together with the identification information, and when the display request event of the display information of the other data portion of the display cache data is received from the client device Whether the data part is display information already transmitted to the client device. The second transmission means for transmitting the identification information stored in the cache storage means in association with the data portion to the client device without transmitting the display information of the data portion. It is characterized by having a and.

According to the present invention, even when displaying sends sequentially client device part data of long display cache data, the can be displayed operation response may ing.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an SBC (Server Based Computing) system according to an embodiment of the present invention.

  This SBC system includes a server device 10 and a plurality of client devices (Thin clients) 20 connected to a network N composed of a LAN (Local Area Network) or a WAN (Wide Area Network).

  The server device 10 includes a plurality of application programs such as an Internet connection processing program, a Web display program (Web browser), a mail processing program, a document creation processing program, a spreadsheet processing program, and a presentation material creation program. Are activated in response to an operation input (input event) signal from the client device 20,.

  In the server device 10, the display output drawing data G generated on the virtual frame buffer RAM 14a for the client (see FIG. 2) in accordance with the execution of the application program according to the operation input signal from the client device 20,. Are transmitted (transferred) to the access source client device 20 after being compressed.

  Then, in the client devices 20,..., The drawing data G transferred from the server device 10 is decompressed and expanded in the frame buffer 25 (see FIG. 6) and displayed on the display device 26.

  That is, each client device (Thin client) 20 in the SBC system has an input function corresponding to a user operation such as a keyboard and a mouse and an output function to an LCD display unit and a printer as main functions. The server device 10 does not have at least various application functions and data file management functions.

  And the data file produced | generated with the various processes started and performed in the server apparatus 10 according to the operation input (input event) signal from the client apparatus 20 ... is fundamentally in the said server apparatus 10. Alternatively, it is stored and stored for each user account or as a shared file in a storage device such as a magnetic disk managed and managed by the server device 10.

  FIG. 2 is a block diagram showing a circuit configuration of the server device 10 in the SBC system.

  The server device 10 includes a CPU 11 as a computer, and a ROM 13, a RAM 14, a frame buffer RAM 15, and a display device 16 are connected to the CPU 11 via a bus 12.

  Further, the CPU 11 is connected to an input device 17 such as a keyboard and a mouse, an external storage device 18a, an auxiliary storage device 18b, a client device 20,...

  The CPU 11 controls the operation of each part of the circuit by using the RAM 14 as a working memory in accordance with a server control program including a system program and various application programs stored in advance in the ROM 13. The various programs are started and executed in response to a processing command (input event) signal corresponding to a user operation from the client device 20 received via / F19.

  In this server device 10, various data generated in accordance with an application program that is activated and executed in response to an input event signal from the client device 20 is stored in the external storage device 18a in association with the user ID, for example. . The drawing data G for client display is generated using the client virtual frame buffer RAM 14 a in the RAM 14, and after being compressed, is transferred from the communication I / F 19 to the client device 20 for display output. .

  The server device 10 has a scroll display cache data information registration DB 14b, a scroll display cache data memory 14c, and a data transmission history memory 14d managed for each client device 20 (user ID). In addition, it has a cache creation frame buffer RAM 14e.

  FIG. 3 is a diagram showing the contents of registration data in the scroll display cache data information registration DB 14b secured in the RAM 14 of the server device 10. As shown in FIG.

  In this scroll display cache data information registration DB 14b, one information registration DB 14b is secured for each client device 20 (user ID). In the scroll display cache data information registration DB 14b, URL information is registered every time the Web page is acquired in response to an input event for requesting acquisition of a new Web page from the client device 20.

  In each registered URL information, “page update date / time” of the Web page acquired in accordance with the URL information, whether the acquired entire data of the Web page has been transmitted to the client device 20 as cache data [0x02], or not [0x00], whether transmission has been completed halfway [0x01], and if transmission has not been completed ([0x00] or [0x01]) indicate whether the transmission priority is high immediately after a page acquisition request from the client device 20 [0x80] “Transmission state”, “Cache ID range” indicating the entire ID range for each part block constituting this cache data (entire Web page), “Start point coordinates and end point coordinates corresponding to the display area of the entire Web page” "Display area information" is stored in association with each other.

  FIG. 4 is a diagram showing the contents of the cache data in the scroll display cache data memory 14c secured in the RAM 14 of the server device 10. As shown in FIG.

  In the scroll display cache data memory 14c, the “data body” of the entire Web page (cache data) acquired according to the URL information registered in the scroll display information registration DB 14b or the data body is stored in another memory. “Saved file name” is stored. The “data body” or “saved file name” of the entire Web page (cache data) stored in the scroll display cache data memory 14c is indicated by “cache ID range” in the scroll display cache data information registration DB 14b. Is stored for each ID “cache ID” of each part block constituting the entire web page, and “data type [0x00: text] [0x01: image JPEG] [0x02: image PNG]... “Transmission state [0x00: not transmitted] [0x01: transmission completed]” to the client device 20 and “display area information” corresponding to the display area are stored in association with each other.

  The “data body” of the entire Web page (cache data) stored in the scroll display cache data memory 14c is once drawn and acquired in the frame buffer RAM 14e for cache creation, and then “ Cache ID, data type, transmission status, and display area information are stored in association with each other.

  FIG. 5 is a diagram showing the contents of transmission history data in the data transmission history memory 14d secured in the RAM 14 of the server device 10. As shown in FIG.

  The data transmission history memory 14d stores “data type”, “transmission data amount”, and “TimeStamp (transmission date and time)” every time data transmission from the server device 10 to the client device 20 is executed. By monitoring the “transmission data amount” and “TimeStamp (transmission date / time)” stored in the data transmission history memory 14d, it is possible to determine whether the current downstream communication is free or busy.

  In the control program of the server device 10, the “URL information” of the new Web page acquired in response to the input event (Web page acquisition request) from the client device 20 is displayed as the scrolling display cache data information registration DB 14b. And a function of storing the entire data of the acquired new Web page in the scroll display cache data memory 14c, and the display cache data (Web page of the Web page) stored in the scroll display cache data memory 14c. The whole data) is transmitted and transferred to the client device 20 while judging the state of the good communication environment based on the “transmission state” registered in the information registration DB 14b and the stored information in the data transmission history memory 14d. The function to perform is incorporated.

  Note that drawing data to be displayed on the display device 16 of the server device 10 itself is generated on the frame buffer RAM 15.

  FIG. 6 is a block diagram showing a circuit configuration of the client device 20 in the SBC system.

  The client device 20 includes a CPU 21 as a computer, and a ROM 23, a RAM 24, and a frame buffer RAM 25 are connected to the CPU 21 via a bus 22. The drawing data G written in the frame buffer RAM 25 is output to the display device 26 and displayed.

  Further, the CPU 21 has an input device 27 such as a keyboard, a mouse, a microphone, and an optical sensor, an external storage device 28a, an auxiliary storage device 28b, and a communication I / F (interface) 29 with the server device 10 via the bus 22. Connected.

  The CPU 21 controls the operation of each part of the circuit using the RAM 24 as a working memory in accordance with a system program (client control program) stored in advance in the ROM 23. The CPU 21 controls a key input signal, a mouse movement signal, a communication I / O The system program is activated and executed in accordance with an application response signal from the server device 10 received via F29, transfer drawing data G, or the like.

  In the client device 20, various data generated by executing the application program in the server device 10 is appropriately read and stored in the external storage device 28a, and the generated drawing data G for transfer is The compressed data is decompressed, written in the frame buffer RAM 25, and displayed on the display device 26.

  The RAM 24 functioning as the working memory includes a scroll display cache data memory 24a. Scroll display cache data memory 14c (see FIG. 5) of the server device 10 is transferred to the scroll display cache data memory 24a according to the “transmission state” and the good communication environment of the downstream device. The display cache data (Web page data) read from (see 4) is stored. The storage format of data in the scroll display cache data memory 24a of the client device 20 is substantially the same as the scroll display cache data memory 14c (see FIG. 4) of the server device 10, and constitutes the entire data of the Web page. Each part block has an ID “cache ID”, “data type”, “display area information”, and “data body (stored file name)”.

  Next, the operation of the SBC system configured as described above will be described.

  FIG. 7 is a flowchart showing server processing of the server device 10 in the SBC system.

  In a state of waiting for data reception from the client device 20 by the communication I / F 19 (step S1), when data is received (step S2), whether or not the content of the received data is an event signal requesting login. Is determined (step S3).

  If it is determined that an event signal requesting login from the client device 20 has been received (step S3 (Yes)), the login processing of the client device 20 that is the login request transmission source is executed, and user authentication processing, An initialization process of the client virtual frame buffer RAM 14a is performed (step S4).

  On the other hand, when data is received from the client device 20 that has already been logged in (steps S1 and S2), if it is determined that an input event signal associated with a user operation of the client device 20 has been received (step S3 ( No) → S5 (Yes)), the process proceeds to the input corresponding process in FIG. 8 (step SA).

  Also, when data from the client device 20 that has already been logged in is received (steps S1 and S2), the cache ID of the Web page stored in the scroll display cache data memory 14c (see FIG. 4) is designated. When it is determined that the cache data transfer request signal has been received (step S3 (No) → S5 (No) → S6 (Yes)), the Web page data (cache) associated with the designated cache ID is determined. Data) is read (step S7), and transmitted and transferred to the client device 20 that has requested the cache data (step S8).

  Then, information on the data transmission amount and transmission date and time associated with the transmission of the cache data is stored in the data transmission history memory 14d (step S9).

  When data from the client device 20 is received (steps S1 and S2), it is determined that the content of the received data is neither a login request event signal, a user input event signal, nor a cache data request signal. If it has been performed (step S3 (No) → S5 (No) → S6 (No)), another process corresponding to the content of the received data is executed (step S10).

  FIG. 8 is a flowchart showing the input handling process accompanying the server process of the server apparatus 10 in the SBC system.

  In this input correspondence processing, first, the content of the input event signal received from the client device 20 is analyzed (step A1), and an event for the application program to be executed is issued according to the content of the analyzed event signal. (Step A2).

  Then, with the execution of the application program according to the input event signal, it is determined whether or not the display drawing data G generation process is included (step A3). If it is determined that the processing for generating the display drawing data G is included (step A3 (Yes)), it is determined whether or not the target of the drawing data G is a web page (step A4). .

  If it is determined that the target of the drawing data G corresponding to the input event is a web page (step A4 (Yes)), the process proceeds to the web page cache data display process in FIG. 9 (step AX). .

  FIG. 9 is a flowchart showing a Web page cache data display process accompanying the input corresponding process of the server device 10 in the SBC system.

  In this Web page cache data display process, first, it is determined whether or not the Web page to be rendered is a switch to a new Web page (new Web page acquisition request) (step X1).

  If it is determined that the page is to be switched to a new Web page (Step X1 (Yes)), the Web page is accessed to obtain the display size of the entire page (Step X2), and the area of the client frame buffer RAM 14a It is determined whether or not it is larger than the size, that is, when the Web page is displayed on the display screen of the client device 20, whether or not the display size is large enough that the entire page cannot be displayed unless scrolling is displayed (Step S1). X3).

  If it is determined that the display size of the entire Web page to be rendered is larger than the area size of the client frame buffer RAM 14a (step X3 (Yes)), the process proceeds to scroll display cache data creation processing in FIG. (Step XB).

  FIG. 10 is a flowchart showing scroll display cache data creation processing associated with Web page cache data display processing of the server device 10 in the SBC system.

  In this scroll display cache data creation process, the entire data of a large-sized Web page to be rendered is acquired as cache data.

  When this cache data creation process is started, first, the cache creation frame buffer RAM 14e is initialized (step B1).

  Then, the designated Web page to be rendered is accessed, and the page update date and time is checked (step B2).

  Then, based on the presence / absence of “URL information” registration of the corresponding Web page registered in the scrolling display cache data information registration DB 14b and the “page update date / time” associated therewith, the designated Web page accessed this time is It is determined whether or not the cache data has already been read (step B3).

  If it is determined that the specified Web page accessed this time has not been read as cache data (step B3 (No)), the Web currently being accessed with respect to the initialized cache creation frame buffer RAM 14e. The entire page data is drawn (step B4), and the page data “data body (save file name)” is added with “cache ID” and “display area information” for each part block, and scroll display cache data. It is stored in the memory 14c (step B5).

  Then, in the scroll display cache data information registration DB 14b, the “URL information”, “page update date / time”, “transmission status [0x00: not transmitted]”, “cache ID range”, “display area” of the Web page stored as cache data this time. "Information" is registered (step B6).

  Unnecessary cache data (Web page) with an old page update date / time, such as when a new Web page with the “page update date / time” is read and registered as cache data with the registration update in the scrolling display cache data information registration DB 14b. ) Exists (occurs) (step B7 (Yes)), the corresponding cache data is deleted from the scrolling display cache data memory 14c (step B8), and corresponds to the client device 20. A delete instruction signal designating the cache ID of the cache data is transmitted (step B9).

  Then, the registration data in the scroll display cache data information registration DB 14b corresponding to the cache ID of the deleted cache data is deleted (step B10).

  Then, after the cache creation frame buffer RAM 14e is cleared and reinitialized (step B11), [0x80: transmission is set as the “transmission state” of the Web page created this time in the scroll display cache data information registration DB 14b. A high priority flag is additionally set (step B12).

  Then, it is determined whether or not a start timer for data transmission monitoring processing, which will be described later in FIG. 11, has been set (step B13), and if it is determined that it has not been set (step B13 (No)), the data transmission is performed. A start timer for the monitoring process is set (step B14).

  If it is determined in step B3 that the designated web page accessed this time has already been read as cache data (step B3 (Yes)), cache data creation processing in steps B4 to B14 is performed. Then, the scroll display cache data creation process is terminated (Return).

  As a result, the entire data of the Web page desired by the user and having a large size that requires scroll display is acquired as cache data, stored in the scroll display cache data memory 14c, and the cache data. Is preferentially transmitted to the client device 20.

  When the scroll display cache data creation process (step XB) in FIG. 10 is thus completed, the process from step X4 of the Web page cache data display process in FIG. 9 is executed.

  In step X4, when a new Web page is read and stored in the scroll display cache data memory 14c in the scroll display cache data creation process (step XB) (steps B3 to B14), the Web The cache data of the part block corresponding to the display area at the top of the page (corresponding to the size of the client frame buffer RAM 14a (25)), together with its "cache ID" and "display area information", is the client device 20 that is the event input source. Sent to.

  In step X4, when it is determined in the scroll display cache data creation process (step XB) that the rendering target Web page has already been read as cache data (step B3 (Yes)), In order to display the read cache data (Web page), only the “cache ID” and “display area information” of each part block constituting the Web page are transmitted to the event input source client device 20.

  Then, information on the data transmission amount and transmission date and time related to the data transmission processing in step X4 is temporarily stored in the RAM 14 (step X5).

  Then, the cache data “data body” corresponding to the head display area of the Web page transmitted to the client device 20 in step X4 is drawn as drawing data G in the client virtual frame buffer RAM 14a, and the client The apparatus 20 synchronizes with the drawing data G written in the frame buffer RAM 25 (step X6).

  On the other hand, if it is determined in step X1 that the web page to be rendered is not switching to a new web page (new web page acquisition request) (step X1 (No)), the current rendering display is displayed. It is determined whether or not the web page is being scrolled (scroll request) (step X7).

  If it is determined that the process is a scrolling process for the currently displayed Web page (step X7 (Yes)), the data part of the Web page corresponding to the scroll destination area has already been transmitted to the client device 20. Is determined based on “transmission state [0x00: not transmitted] or [0x01: transmission completed]” of the part block corresponding to the scroll destination area stored in the scroll display cache data memory 14c ( Step X8).

  If it is determined that the data portion of the Web page corresponding to the scroll destination area has not been transmitted to the client device 20 (step X8 (No)), the part block of the Web page corresponding to the scroll area is determined. Are transmitted to the client device 20 together with the “cache ID” and “display area information” (steps X9 and X10).

  If it is determined that the data portion of the Web page corresponding to the scroll destination area has been transmitted to the client device 20 (step X8 (Yes)), the part of the Web page corresponding to the scroll area is determined. Only “cache ID” and “display area information” corresponding to the block are transmitted to the client device 20 (step X10).

  Then, information on the data transmission amount and transmission date and time related to the data transmission processing in steps X9 and X10 is temporarily stored in the RAM 14 (step X5).

  Then, the cache data “data body” corresponding to the scroll destination area of the Web page transmitted to the client device 20 in the steps X9 and X10 is drawn as the drawing data G in the client virtual frame buffer RAM 14a. The client apparatus 20 synchronizes with the drawing data G written in the frame buffer RAM 25 (step X6).

  On the other hand, in step X3, it is determined that the display size of the entire Web page to be rendered is within the area size of the client frame buffer RAM 14a (no scrolling required) (step X3 (No)), or In steps X1 and X7, the web page to be rendered is not a switch to a new web page (new web page acquisition request) (step X1 (No)), but scrolling the web page currently being rendered and displayed. If it is determined that the process is not a process (scroll request) (step X7 (No)), the Web page cache data display process is terminated without performing any of the cache data processes described above (Return).

  In the Web page cache data display process (step AX), when any cache data process associated with switching to a new Web page or scrolling the Web page being displayed is performed (step A5 ( Yes)), information on the data transmission amount and the transmission date and time related to the data transmission processing in Step X4 or Steps X9 and X10 temporarily stored in the RAM 14 in Step X5 is stored in the data transmission history memory 14d. (Step A6).

  On the other hand, in the Web page cache data display process (step AX), is it determined that the display size of the entire page accompanying the switching of the Web page is within the area size of the client frame buffer RAM 14a (no scrolling required) (step)? X3 (No)) or switching to a new Web page, and it is determined that the Web page being displayed is not scrolling (Steps X1 (No), X7 (No)), any cache data When the process is not performed (step A5 (No)), the drawing data G accompanying the switching of the Web page or the drawing data G accompanying the drawing update in the Web page being displayed is the virtual for client. The data is written in the frame buffer RAM 14a (step A7).

  On the other hand, when it is determined that the object to be generated as the display drawing data G is not a Web page with the execution of the application program according to the input event signal from the client device 20 (Steps A1 to A3 ( No) → A4 (No)), the drawing data G generated according to the application program being executed is written in the virtual frame buffer RAM for client 14a (step A7).

  Then, the drawing data G written in the client virtual frame buffer RAM 14a is generated as drawing data to be transmitted after being subjected to an encoding process such as data compression (step A8), and is a transmission source of the input event signal. It is transmitted to the client device 20 (step A9).

  Then, the information on the data transmission amount and the transmission date and time related to the data transmission processing in step A9 is stored in the data transmission history memory 14d (step A6).

  On the other hand, if it is determined that the generation process of the display drawing data G is not included with the execution of the application program according to the input event signal (step A3 (No)), some data transmission process is included. Whether or not (step A10).

  If it is determined that data transmission processing is included (step A10 (Yes)), the input event other than the drawing data G such as a connection confirmation signal periodically performed with the client device 20, for example. The data (signal) corresponding to is transmitted to the client device 20 that is the transmission source of the input event signal (step A11).

  Then, the information on the data transmission amount and the transmission date and time related to the data transmission processing in step A11 is stored in the data transmission history memory 14d (step A6).

  FIG. 11 is a flowchart showing a data transmission monitoring process executed by the server device 10 of the SBC system.

  This data transmission monitoring process is repeatedly executed at every preset timer time set in step B14 in the scroll display cache data creation process in FIG. 10, and is generated and stored in the scroll display cache data memory 14c. The cache data (Web page data) thus transmitted is transmitted to the client device 20 that is the acquisition request source of the Web page.

  When this data transmission monitoring process is started, first, the “transmission data amount” and “TimeStamp (transmission date and time)” stored in the data transmission history memory 14d are read (step C1), and immediately before the current time. The total amount of transmission data up to (n seconds ago) is acquired (step C2).

  When it is determined that the amount of transmission data immediately before acquired in step C2 is smaller than a preset threshold value x and the amount of downstream communication data is small and free (step C3 (Yes)), The “transmission state” in the scroll display cache data information registration DB 14b is read, and the “transmission state” is “0x00: not transmitted” + [0x80: transmission priority high] or [0x01: transmitted halfway] + A cache ID waiting for data transmission set to [0x80: high transmission priority], [0x00: not transmitted] or [0x01: transmitted halfway] is determined in order of priority. Then, the cache data (Web page data) corresponding to the cache ID waiting for high-priority data transmission is acquired from the scroll display cache data memory 14c (step C4), and transmitted to the client device 20 for transfer. (Step C5).

  Then, information on the data transmission amount and transmission date and time related to the data transmission processing in step C5 is stored in the data transmission history memory 14d (step C6).

  Then, the “transmission state” in the scroll display cache data memory 14c corresponding to the cache ID of the cache data (Web page data) that has been transmitted to the client device 20 in the step C5 is [0x01: transmission]. In [Completed], the "transmission state" in the scrolling display cache data information registration DB 14b is changed to [0x02: transmission complete] or [0x01: transmitted halfway] and registered (step C7).

  At this time, [0x80: transmission priority as the “transmission state” in the scroll display cache data information registration DB 14b corresponding to the cache ID of the cache data (Web page data) that has been transmitted to the client device 20. If “high” is set (step C8 (Yes)), the priority flag [0x80] is reset (step C9), and the start timer of the data transmission monitoring process is stopped (step C10).

  As described above, according to the server device 10, when data of a new web page and a web page having a size that requires scroll display is acquired as a drawing target according to an input event from the client device 20. Creates and manages the entire data of the Web page as cache data, and first transmits the data portion corresponding to the display area of the first page to the client device 20 together with its “cache ID” and “display area information” for display. Let Then, the data portion corresponding to the untransmitted page area of the Web page created as the cache data, together with its “cache ID” and “display area information”, is determined preferentially by determining when the amount of downstream communication data is small. It can be transmitted to the client device 20.

  Thereafter, when an input event for instructing scrolling of the Web page being displayed stored as cache data in the client device 20 is received from the client device 20, “ Only the “cache ID” and “display area information” can be transmitted to the client device 20 for scroll display.

  FIG. 12 is a flowchart showing client processing of the client device 20 in the SBC system.

  When the client device 20 is powered on, communication with the server device 10 is started and a login request is transmitted (step D1), and connection establishment with the server device 10 including user authentication processing and memory initialization processing is established. Is performed (step D2).

  Then, the data reception standby state from the server device 10 is entered (step D3), and the data received from the server device 10 is analyzed (step D4), whereby the connection with the server device 10 associated with the login request is established. It is determined whether it has been established (step D5).

  When it is determined that the connection with the server device 10 has been established (step D5 (Yes)), the occurrence of an input event associated with the user operation of the client device 20 itself or a reception event occurrence associated with data reception from the server device 10 is waited for. A state is reached (step D6).

  If it is determined that a reception event associated with data reception from the server device 10 has occurred in this event generation standby state (step D7 (Yes)), the process proceeds to a data reception process in FIG. 13 (step DE).

  FIG. 13 is a flowchart showing data reception processing accompanying client processing of the client device 20 in the SBC system.

  In this data reception process, first, it is determined whether or not the content of the reception event accompanying the data reception from the server device 10 is a display drawing event (step E1).

  Here, when it is determined that the content of the reception event accompanying the data reception from the server device 10 is a display drawing event (step E1 (Yes)), the drawing event displays the cache ID and the display area information. It is determined whether or not the display event is based on the cache data included (step E2).

  If it is determined that the received data from the server device 10 is a display event based on cache data including the cache ID and display area information (step E2 (Yes)), the scroll display cache data memory in the RAM 24 is displayed. The cache data (Web page data) corresponding to the received cache ID is read from 24a (step E3). When the cache data (Web page data) corresponding to the cache ID is stored in the scroll display cache data memory 24a and is read (step E4 (Yes)), the cache data is stored. (Web page data) is written into the frame buffer RAM 25 as drawing data G, and drawing processing for the display device 26 is executed (step E5).

  If the cache data (Web page data) corresponding to the received cache ID is not stored in the scroll display cache data memory 24a and cannot be read (step E4 (No)), A cache data transfer request signal designating the cache ID is transmitted to the server device 10 (step E6).

  On the other hand, the content of the reception event accompanying the data reception from the server device 10 is not a display drawing event (step E1 (No)), and the received data includes “cache ID”, “data type”, “display area information”, “ If it is determined that the event is a registration event of cache data (Web page data) including the “data body” (see FIG. 4) (step E7 (Yes)), the received data is the scroll display cache data memory in the RAM 24. 24a is stored and saved (step E8).

  If it is determined that the event is a cache data deletion event in which the cache ID stored in the scrolling display cache data memory 24a is designated (step E9 (Yes)), it corresponds to the designated cache ID. The cache data is deleted (step E10).

  On the other hand, it is determined that the content of the reception event associated with data reception from the server device 10 is a display drawing event (step E1 (Yes)), and this drawing event is not a display event by the cache data. If it is determined (step E2 (No)), an analysis process such as decoding the compression of the received drawing data G is executed (step E12), and the analyzed drawing data G is stored in the frame buffer. The data is written in the RAM 25, and the drawing process for the display device 26 is executed (step E13).

  When the corresponding cache data is received as a drawing event from the server device 10 in response to the cache data transfer request designating the cache ID in step E6 (step E1 → E2 → E12), the cache The “data body (Web page data)” included in the data is written in the frame buffer RAM 25 as the drawing data G, and the drawing process for the display device 26 is executed (step E13).

  In this case, it is determined that the event is a registration event of cache data (Web page data) (step E14 (Yes)), and the received cache data is stored in the scroll display cache data memory 24a in the RAM 24. (Step E15).

  On the other hand, when it is determined in the event generation standby state in step D6 in FIG. 12 that an input event accompanying a user operation has occurred (step D8 (Yes)), the process proceeds to the data transmission process in FIG. (Step DF).

  FIG. 14 is a flowchart showing data transmission processing accompanying client processing of the client device 20 in the SBC system.

  When this data transmission process is started, first, the type of the input event accompanying the user operation is determined (step F1).

  Then, transmission data corresponding to the input event determined as the type is generated (step F2) and transmitted to the server device 10 (step F3).

  Therefore, according to the SBC system having the above-described configuration, when the content of the input event received from the client device 20 is a Web page acquisition request in the server device 10, it is a new Web page and scrolled. Is a Web page of a necessary size, the entire data of the Web page is acquired and stored as cache data in the scrolling display cache data memory 14c, and only the data portion corresponding to the display area at the top of the page is stored. Along with the “cache ID” and “display area information”, it is transmitted to the client device 20 to be stored and displayed. Then, the untransmitted data portion of the Web page created as the cache data is preferentially transmitted to the client device 20 for storage after determining whether the downstream communication environment is good. Thereafter, when the content of the input event received from the client device 20 is a scroll instruction for the Web page being displayed, the “cache ID” and “display area information” of the cache data portion corresponding to the scroll destination area are displayed. Only to the client device 20. As a result, even when the client device 20 acquires a large-sized Web page and displays it while scrolling, the client device 20 does not need to receive and acquire the data portion corresponding to the scroll destination area each time. Since the cache data (Web page data) stored in the display cache data memory 14c can be read and displayed, it can be displayed with good operation response.

  In the embodiment, the case where the content of the scroll display cache data is Web page data has been described. However, the data is not limited to the Web page data, and may be other document file or image file data. Also good. That is, for example, when the client device 20 requests acquisition of the same data, such as data shared and managed between the client devices 20..., The new data is acquired and the cache ID is associated and stored as cache data. At the same time, only the data portion corresponding to the top display area of the data is immediately transmitted and displayed. And it is good also as a structure which judges the state where the communication environment of downstream is favorable, and transmits and transmits to the client apparatus 20 the data part which has not transmitted the said data with the cache ID.

  Note that each processing method by the SBC system described in the embodiment, that is, server processing by the server apparatus 10 shown in the flowchart of FIG. 7, input corresponding processing accompanying the server processing shown in the flowchart of FIG. 8, flowchart of FIG. The Web page cache data display process accompanying the input corresponding process of the server apparatus 10 shown in FIG. 10, the scroll display cache data creation process accompanying the Web page cache data display process of the server apparatus shown in the flowchart of FIG. 10, and the flowchart of FIG. Data transmission monitoring processing by the server device 10 shown, client processing by the client device 20 shown in the flowchart of FIG. 12, data reception processing accompanying the client processing shown in the flowchart of FIG. 13, shown in the flowchart of FIG. Each method such as data transmission processing accompanying the client processing is a program that can be executed by a computer, such as a memory card (ROM card, RAM card, etc.), magnetic disk (floppy disk, hard disk, etc.), optical disc (CD, etc. -ROM, DVD, etc.), can be stored and distributed in the medium of the external recording device 18a, 28a such as a semiconductor memory. Then, the computers (CPUs 11 and 21) of the server device 10 and the client device 20 read the programs stored in the media of the external recording devices 18a and 28a into the storage devices (flash ROMs 13 and 23 and RAMs 14 and 24) and read them. By controlling the operation by the program, the acquisition and generation function as the cache data in the server device 10 of the user-desired data described in the embodiment and the transfer and storage function to the client device 20 are realized. A similar process can be executed.

  Further, program data for realizing each of the above methods can be transmitted on the communication network (N) in the form of a program code, and from a computer device (program server) connected to the communication network (N). The program data is fetched and stored in a storage device (flash ROMs 13, 23 and RAMs 14, 24), and the above-described acquisition / generation function as cache data in the server device 10 of user-desired data, and transfer storage to the client device 20 Functions can also be realized.

  Note that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention at the stage of implementation. Further, each of the embodiments includes inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in each embodiment or some constituent elements are combined in different forms, the problems described in the column of the problem to be solved by the invention If the effects described in the column “Effects of the Invention” can be obtained, a configuration in which these constituent requirements are deleted or combined can be extracted as an invention.

1 is a block diagram showing a configuration of an SBC (Server Based Computing) system according to an embodiment of the present invention. The block diagram which shows the circuit structure of the server apparatus 10 in the said SBC system. The figure which shows the content of the registration data in the scroll display cache data information registration DB14b ensured in RAM14 of the said server apparatus 10. FIG. The figure which shows the content of the cache data in the display cache data memory 14c for scrolls ensured in RAM14 of the said server apparatus 10. FIG. The figure which shows the content of the transmission history data in the data transmission history memory 14d ensured at RAM14 of the said server apparatus 10. FIG. The block diagram which shows the circuit structure of the client apparatus 20 in the said SBC system. The flowchart which shows the server process of the server apparatus 10 in the said SBC system. The flowchart which shows the input corresponding | compatible process accompanying the server process of the server apparatus 10 in the said SBC system. The flowchart which shows the web page cache data display process accompanying the input corresponding | compatible process of the server apparatus 10 in the said SBC system. The flowchart which shows the display cache data creation process for a scroll accompanying the web page cache data display process of the server apparatus 10 in the said SBC system. The flowchart which shows the data transmission monitoring process performed by the server apparatus 10 of the said SBC system. The flowchart which shows the client process of the client apparatus 20 in the said SBC system. The flowchart which shows the data reception process accompanying the client process of the client apparatus 20 in the said SBC system. The flowchart which shows the data transmission process accompanying the client process of the client apparatus 20 in the said SBC system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Server apparatus 20 ... Client apparatus 11, 21 ... CPU
12, 22 ... Bus 13, 23 ... ROM
14, 24 ... RAM
14a ... Virtual frame buffer RAM for client
14b ... Scroll display cache data information registration DB (Data Base)
14c ... Display cache data memory for scrolling (server device)
14d: Data transmission history memory 14e: Frame buffer RAM for cache creation
24a ... Display cache data memory for scrolling (client device)
15, 25 ... Frame buffer RAM
16, 26 ... Display device 17, 27 ... Input device 18a, 28a ... External storage device 18b, 28b ... Auxiliary storage device 19, 29 ... Communication I / F
N: Communication network G: Display drawing data

Claims (12)

  1. A server device that executes an application program based on an input event from a client device via a network, generates display information corresponding to the input event, and transmits the display information to the client device,
    Acquisition data determination means for determining whether the data acquired by the application program is new data;
    A cache data storage unit that stores the new data acquired by the application program in association with an identifier as display cache data when the acquired data determination unit determines that the data is new data;
    Cache data transmission means for transmitting the display cache data stored by the cache data storage means together with its identifier to the client device;
    If the input event from the client device is a scrolling input event for the display cache data transmitted by the cache data transmission means, the cache data storage means stores it in association with the transmitted display cache data. A cache identifier transmitting means for transmitting the identifier to the client device as display information corresponding to the input event;
    Equipped with a,
    The cache data storage means stores new data acquired by the application program in association with an identifier for each data portion as display cache data composed of a plurality of data portions,
    The cache identifier transmission means, when the input event from the client device is a scroll input event for the display cache data transmitted by the cache data transmission means, the scroll destination data of the transmitted display cache data An identifier associated with a portion and stored by the cache data storage means is transmitted to the client device as display information corresponding to the input event;
    The server apparatus characterized by the above-mentioned.
  2. The cache data transmission means includes
    First cache data transmission means for transmitting, to the client device, display cache data of the head portion corresponding to the display area of the client device, among the display cache data stored by the cache data storage device,
    Second cache data transmission means for transmitting display cache data of an untransmitted portion by the first cache data transmission means together with the identifier thereof to the client device,
    The server apparatus according to claim 1 .
  3. The second cache data transmission unit includes a communication state determination unit that determines a communication state to the client device. When the communication state determination unit determines that the communication state is good, the first cache data transmission unit Transmitting the display cache data of the untransmitted portion by the cache data transmitting means together with its identifier to the client device,
    The server device according to claim 2 .
  4. A client device that transmits an input event to the server device according to claim 1 ,
    An input event transmitting means for transmitting an input event according to a user operation to the server device;
    Data receiving means for receiving data transmitted from the server device;
    If the data received by the data receiving means is the display cache data and its identifier, cache data registration means for registering the display cache data and the identifier in association with each other;
    In response to the user input event transmitted by the input event transmitting means, if the data received by the data receiving means is an identifier as display information, the cache data registration means is associated with the identifier. Cache data display means for displaying the registered display cache data;
    In response to the user input event transmitted by the input event transmitting means, when the data received by the data receiving means is drawing data as display information, drawing data display means for displaying the drawing data ;
    A client device comprising:
  5. A server device that receives a display request event from a client device via a network and transmits display information based on the display request event to the client device,
    Cache storage means for storing display information of each data portion of display cache data composed of a plurality of data portions in association with identification information for identifying the display information;
    A first transmission means for transmitting the display information together with the identification information when transmitting display information of a part of the display cache data based on a display request from the client device;
    When a display request event for display information of another data portion of the display cache data is received from the client device, whether or not the data portion is display information that has already been transmitted to the client device. If it is determined and transmitted, the second transmission means for transmitting the identification information stored in the cache storage means in association with the data part without transmitting the display information of the data part;
    A server device comprising:
  6. The display request event of the display information of the other data part is a display scroll event,
    If the display information corresponding to the data portion of the scroll destination has been transmitted, the second transmission means transmits the identification information corresponding to the data portion of the scroll destination to the client device.
    The server device according to claim 5.
  7. The second transmission means transmits the display information corresponding to the data portion to the client device together with identification information for identifying the display information when the data portion has not been transmitted to the client device.
    The server device according to claim 5 or 6, wherein
  8. A client device that transmits a display request event to the server device according to claim 5,
    Receiving means for receiving data transmitted from the server device;
    When the data received by the receiving means is display information and identification information of a part of the display cache data, cache registration means for sequentially registering the display information and the identification information in association with each other,
    If the data received by the receiving means in response to the display request event is identification information without display information, the display information registered in the cache registration means in association with the identification information is read and displayed. If the data received by the receiving means in response to the display request event is display information, display means for displaying the display information;
    A client device comprising:
  9. Run the application program based on the input event from the client device via the network, there in program for controlling a computer of a server apparatus generates display information corresponding to the input event to send to the client device And
    Acquisition data determination means for determining whether data acquired by the application program is new data;
    A cache data storage unit that stores the new data acquired by the application program in the memory in association with an identifier as display cache data when the acquired data determination unit determines that the data is new data;
    Cache data transmission means for transmitting the display cache data stored in the memory by the cache data storage means to the client device together with the identifier;
    When the input event from the client device is a scrolling input event for the display cache data transmitted by the cache data transmission means, the cache data storage means associates the display event with the cache data storage means and stores it in the memory. A cache identifier transmitting means for transmitting the stored identifier to the client device as display information corresponding to the input event;
    To function as,
    The cache data storage means stores new data acquired by the application program in association with an identifier for each data portion as display cache data composed of a plurality of data portions,
    The cache identifier transmission means, when the input event from the client device is a scroll input event for the display cache data transmitted by the cache data transmission means, the scroll destination data of the transmitted display cache data An identifier associated with a portion and stored by the cache data storage means is transmitted to the client device as display information corresponding to the input event;
    Computer readable program.
  10. A program for controlling a computer of a client device that transmits an input event to the server device according to claim 9,
    The computer,
    An input event transmitting means for transmitting an input event corresponding to a user operation to the server device;
    Data receiving means for receiving data transmitted from the server device;
    If the data received by the data receiving means is the display cache data and its identifier, cache data registration means for registering the display cache data and the identifier in association with each other,
    In response to the user input event transmitted by the input event transmitting means, if the data received by the data receiving means is an identifier as display information, the cache data registration means is associated with the identifier. Cache data display means for displaying the registered display cache data;
    In response to the user input event transmitted by the input event transmitting means, when the data received by the data receiving means is drawing data as display information, drawing data display means for displaying the drawing data;
    A computer-readable program designed to function as a computer.
  11. A program for controlling a computer of a server device that receives a display request event from a client device via a network and transmits display information based on the display request event to the client device,
    The computer,
    Cache storage means for storing display information of each data portion of display cache data composed of a plurality of data portions in association with identification information for identifying the display information;
    A first transmission means for transmitting the display information together with the identification information when transmitting display information of a part of the display cache data based on a display request from the client device;
    When a display request event for display information of another data portion of the display cache data is received from the client device, whether or not the data portion is display information that has already been transmitted to the client device. A second transmission unit that transmits the identification information stored in the cache storage unit in association with the data part to the client device without transmitting the display information of the data part if it is determined and transmitted;
    A computer-readable program designed to function as a computer.
  12. A program for controlling a computer of a client device that transmits a display request event to the server device according to claim 11,
    The computer,
    Receiving means for receiving data transmitted from the server device;
    If the data received by the receiving means is display information and identification information of a part of the display cache data, cache registration means for sequentially registering the display information and the identification information in association with each other,
    If the data received by the receiving means in response to the display request event is identification information without display information, the display information registered in the cache registration means in association with the identification information is read and displayed. If the data received by the receiving means in response to the display request event is display information, display means for displaying the display information,
    A computer-readable program designed to function as a computer.
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