GB2356780A - Transmission of web pages without images that have not been updated after a time indicated by a check signal - Google Patents

Transmission of web pages without images that have not been updated after a time indicated by a check signal Download PDF

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Publication number
GB2356780A
GB2356780A GB0101999A GB0101999A GB2356780A GB 2356780 A GB2356780 A GB 2356780A GB 0101999 A GB0101999 A GB 0101999A GB 0101999 A GB0101999 A GB 0101999A GB 2356780 A GB2356780 A GB 2356780A
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GB
United Kingdom
Prior art keywords
image
homepage
web server
request signal
terminal apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0101999A
Other versions
GB2356780B (en
GB0101999D0 (en
Inventor
Hiroto Nagal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP11020825A external-priority patent/JP2000222327A/en
Application filed by NEC Corp filed Critical NEC Corp
Publication of GB0101999D0 publication Critical patent/GB0101999D0/en
Publication of GB2356780A publication Critical patent/GB2356780A/en
Application granted granted Critical
Publication of GB2356780B publication Critical patent/GB2356780B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/90—Details of database functions independent of the retrieved data types
    • G06F16/95—Retrieval from the web
    • G06F16/957—Browsing optimisation, e.g. caching or content distillation
    • G06F16/9574—Browsing optimisation, e.g. caching or content distillation of access to content, e.g. by caching
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/90—Details of database functions independent of the retrieved data types
    • G06F16/95—Retrieval from the web
    • G06F16/957—Browsing optimisation, e.g. caching or content distillation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services
    • H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
    • H04L67/5682—Policies or rules for updating, deleting or replacing the stored data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/2866—Architectures; Arrangements
    • H04L67/289—Intermediate processing functionally located close to the data consumer application, e.g. in same machine, in same home or in same sub-network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]

Description

2356780 COMMUNICATION APPARATUS HAVING A BROWSER, WEB SERVER,
COMMUNICATION SYSTEM AND COMMUNICATION METHOD THEREOF
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a communication apparatus having a browser, a web server, a communication system and a communication method thereof. More particularly, it relates to a communication apparatus having a browser, a web server, a communication system and a communication method thereof capable of communicating data inludinq an image. 2. Description of the Related Art
First, a conventional communication system will be described with reference to FIGS. I and 2. The conventional communication system has a portable terminal apparatus, a browser executed on the portable terminal apparatus, a web server used for an internet implementation and a network connecting the portable terminal apparatus to the web server. The portable terminal apparatus acquires a home page from the Web server in the below-m.'entioned sequential ogeration. Here, a home page is intended to have its ordinary meaning and refers to a graphical display transmitted over a network from one computer to another, and may also be known by other names, such as a web page. The home I page can be written based upon a Hyper Text Markup Language (HTML) and can include an image. These will be understood to be examples and may take other forms and could be written in other languages.
First, as shown in FIG. 1, a portable terminal apparatus 101 transmits a homepage request signal to a web server 102 through a browser 101A (step 1) That is, a uniform resource locator (URL) identifying a home page requested by the portable terminal apparatus 101 is transmitted from the portable terminal apparatus 101 to the web server 102 through the browser 101A as the homepage request signal. Next, the web server 102 transmits HTML data of the requested home page to the portable terminal apparatus 101 (step 2). The HTML data sent to the portable terminal apparatus 101 is shown in FIG. 2A. Subsequently, the portable terminal apparatus 101 transmits an. image request signal to the web server 102 in order to acquire an image data contained in the received HTML data of the homepage (step 3). The web server 102 transmits the requested image data to the terminal apparatus 101 (step 4). The transmitted image data is shown in FIG. 2B. In this convent'ional communication system, the portable terminal apparatus 101 acquires all of image data irrespective of the fact that the image contained in the home page is required, or not 2 required by the user. An acquisition of the image data not reguired by the user of the portable terminal apparatus 101 wastes electric power consumed by the portable terminal apparatus 101, and therefore shorten the operation time thereof. Further, there are many images which are not directly related to the contents of the home page, and also are not useful for or desired by users. As a consequence, because a large amount of image data not required by the user is acquired, traffic on a transmission path is increased unnecessarily.
Also, another conventional communication system is disclosed in Japanese Laid-open Patent Application No. 10-240604. In this conventional communication system, as to image data stored in a cache memory of a terminal device, a request signal for acquiring the image data is transmitted, wherein time information indicative of the time when the image data is stored in the cache memory is added to the request signal. And then, only when the requested image data located on the server is updated after the time defined by the time information, is the image data transmitted to the terminal device.
In this conventional communication system, all the transmitted images are temporarily stored in the cache memory and a user of the terminal device cannot identify an image that is not required by the user itself.
3 Since the image data stored in the cache memory is rewritten every time the image data is newly acquired, when the storage capacity of this cache memory is small, the stored image data is immediately deleted. Thus, a 5 riumber of operations for acquiring image data are execiked, and therefore, traffic on a transmission path is not decreased because the deleted image data is acquired again even though it has not been updated. Such an image data acquisition operation causes the utilization time of the terminal device to be shortened. Also, since the amount of data in image data is larger than the amount of data in TEXT data and HTML data, the storage capacity of such a required cache memory has to be large. However, because such storage capacity is limited in a portable terminal apparatus such as a portable/mobile telephone, these conventional technologies are not useful in the field of portable terminals.
SUMMARY OF THE INVENTION it is therefore an object of the preferred embodi ment of the present invention to provide a communication apparatus having a browser, a web server, a communication system and a communication method thereof capable of communicating an image data without shortening the utilization time of the communication apparatus.
4 Another object of the preferred embodiments of the present invention is to provide a communication apparatus having a browser, a web server, a communication system and a communication method thereof capable of communicating image data without providing a large amount of memory capacity with the communication apparatus.
Still another object of the preferred embodiments of the present invention is to provide a communication apparatus having a browser, a web server, a communication system and a communication method thereof capable of communicating image data without increasing traffic on a transmission path.
one f orm of the invention is a web server which is connected to a terminal device through a network and which comprises: a receiver for receiving a homepage request signal, an image request signal and a check signal, wherein the homepage request signal includes a first locator identifying a homepage which is requested by the terminal device, the image request signal includes a second locator identifying an image contained in the homepage, and the check signal includes- a third locator identifying the image and time information; and a transmitter for transmitting the homepage when the homepAge request signal is received, the image when the image request signal is received, and a nontransmission signal in lieu of the image when the check signal is received and the image has not been updated after the time indicated by the time information.
The invention is.also, a computer program allowing the foregoing reception and transmission by the web server. BRIEF DESCRIPTION OF THE DRAWINGS
Preferred features of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:FIG. 1 is a sequence diagram showing an operation of a conventional communication system.
FIG. 2A is a diagram showing HTML data transmitted 10 to the portable terminal apparatus shown in FIG. 1.
FIG. 2B is a diagram showing image data transmitted to the portable terminal apparatus shown in FIG. 1.
FIG. 3 is a schematic diagram showing a communication system according to an embodiment of the 15 present invention.
FIG. 4 is a block diagram showing a structure of a portable terminal apparatus according to a first embodiment of the present invention.
FIG. 5 is a diagram showing data stored in the memory shown in FIG- 4.
FIG. 6 is a, block diagram showing a structure of a web server according to the first embodiment of the present invention.- FIG. 7 is a flowchart showing an operation of a 25 communication system according to the first embodiment of 6 the present invention.
FIG. 8 is a block diagram showing a structure of a portable terminal apparatus according to a second embodiment of the present invention.
FIG. 9 is a flowchart showing an operation of a communication system according to the second embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Next, preferred embodiments of the present invention will be discussed in detail with reference to the drawings.
As shown in FIG. 3, a communication system according to a first embodiment of the present invention includes a portable terminal apparatus 1 such as a mobile telephone or a personal data assistant (PDA) which includes a browser 1A, a web server 2, and a communication network 3 used to connect the portable terminal apparatus I to the web server 2. The communication network 3 is established by at least one of a wired circuit and a radio circuit.
Referring.to FIG. 4, the portable terminal apparatus 1 comprises an image acquisition information setting unit 11, a time information setting unit 12 and the browser 1A. The image acquisition information setting unit 11 sets image acquisition information with respect to each image contained in.a home page written by a markup 7 I I language such as a hyper text markup language (HTML), a compact-hyper text markup language (C-HTML), a wireless markup language (WML), a extensible markup language (XML) and the like. The image acquisition information is set by a user of the portable terminal apparatus 1 through the image acquisition information setting unit 11 with respect to an image contained in a homepage, when the user determines that there is no need to acquire that image when subsequently accessing the homepage. Thus, operation of the image acquisition information setting unit 11 is executed by a user's specified operation. Such a specified operation may be a depression of a specified key mounted on the portable terminal apparatus 1 by the user. The user can depress the specified key while confirming the image displayed on a display device (not shown). The time information setting unit 12 set s time information indicative of the time when the image acquisition information is set by the image acquisition information setting unit 11.
The browser 1A comprises a memory 13, a checking unit 14, a receiving unit 15 and a transmitting unit 16.
The image acquisition information set by the image acquisition information setting unit 11 and the time information set by the time information setting unit 12 are stored in the memory 13. As shown in FIG. 5, a 8 uniform resource locator (URL) identifying the image which is not required by the user is set as the image acquisition information in accordance with the time information indicative of the time when the image acquisition information is set. The checking unit 14 checks whether or not the URL identifying the image contained in the home page is coincident with the URL which is stored in the memory 13 as the image acquisition information, when the home page is received by the receiving unit 15. The receiving unit 15 receives the homepage and the image contained in the home page transmitted from the web server 2 through the communication network 3.. The transmitting unit 16 transmits a homepage request signal for requesting the web server 2 to transmit the homepage and an image request signal for requesting the web server 2 to transmit the image contained in the homepage. The homepage request signal and the image request signal include a URL -identifying the homepage and the image, respectively. Further, the transmitting unit 16 transmits a check signal including the image acquisition information indicative of the URL identifying the image which is not required by the user and the corresponding time information.
As shown in FIG. 6, the web server 2 comprises a 9 receiving unit 21 for receiving the homepage request signal, the image request signal and the check signal from the portable terminal apparatus 1, a memory 22 for temporarily or permanently storing a plurality of.
homepages and images contained in the homepages, a transmitting unit 23 for transmitting a homepage, an image contained in the homepagp and a non-transmission signal which is described hereinafter, and a control unit 24 for controlling the receiving unit 21, the memory 22 and the transmitting unit 23.
Next, operation of the communication system according to the first embodiment of the present invention will be discussed with reference to FIG. 7.
The portable terminal apparatus I transmits a homepage request signal to the web server 2 for acquiring a homepage (step 101) The homepage request signal includes a URL identifying the requested homepage. The web server 2 receives the homepage request signal, reads the requested homepage identified by the URL from the memory 22 and transmits the homepage to the portable terminal apparatus I (step 102). When the portable terminal apparatus 1 receives the homepage, it is determined in the checking unit 14 whether or not a URL of an image contained in the home page transmitted from the web server 2 is coincident with a URL which is stored in the memory 13 as an image acquisition information (step 103) - If the URL identifying the image contained in the transmitted homepage is not coincident with the stored URL, that is, the URL identifying the image contained in the transmitted homepage is not stored in the memory 13 as the image acquisition information, the portable terminal apparatus 1 transmits an image request signal to the web server 2 f or acquiring the image contained in the transmitted homepage (step 104). The image request signal includes the URL identifying the image contained in the transmitted homepage. When the web server 2 receives the image request signal from the portable terminal apparatus 1, the web server 2 reads the requested image identified by the URL included in the image request signal from the memory 22 and transmits the requested image to the portable server 1 (step 105) on the other hand, in step 103, if the URL of the image contained in the homepage transmitted from the web server 2 is coincident with the URL stored in the memory 13, the portable terminal apparatus 1 transmits a check signal to the web server 2 (step 106). The check signal includes the stored URL and the time information indicative of the time when the URL is stored. When the web server 2 receives the check signal from the portable terminal apparatus 1, it is determined in the control 11 unit 24 whether or not the image contained in the homepage has been updated after the time indicated by the time information contained in the check signal (step 107) If the image is not updated after the time, the web server 2 transmits a non- transmission signal in lieu of the image contained in the homepage, wherein the image is not transmitted to the portable terminal apparatus 1 (step 108). When the portable terminal apparatus 1 receives the nontransmission signal, it is determined whether or not another image is contained in the transmitted homepage from the web server 2 (step 111) If another image is not contained in the transmitted homepage, this procedure is completed (END) If another image is contained in the transmitted homepage, the procedure returns to step 103.
In step 107, if the image was updated after the time identified by the time information contained in the check signal transmitted from the portable terminal apparatus 1 to the web server 2, the web server 2 transmits the updated image to the portable terminal apparatus 1 (step 109).
When the portable terminal apparatus 1 receives the requested image transmitted in step 105 or the updated image transmitted in step 109 from the web server 2, the image acquisition information setting unit 11 of the 12 portable terminal apparatus 1 sets image acquisition information. The image acquisition information is set with respect to the requested image or the updated image in accordance with the time information set by the time information setting unit 12, if the transmitted requested image or the transmitted updated image is not required by a user of the portable terminal apparatus after this instance of access of the homepage (step 110) The image acquisition information is preferably set by the user through a specified key operation while the user confirms the image which is displayed.
After that, it is determined whether or not another image is contained in the transmitted homepage from the web server 2 (step 111) If another image is not contained in the transmitted homepage, this procedure is completed (END) if another image is contained in the transmitted homepage,. the procedure returns to step 103.
In accordance with the above-described first embodiment of the present invention, since the image 20 which is not required by the user of the portable -terminal apparatus is not received by the portable terminal apparatus, power consumption of this portable terminal apparatus can be reduced and the utilization time of the portable terminal apparatus can be extended.
Also, since an image unnecessary to the user is 13 not saved in a cache memory, a memory region of the cache memory employed in the portable terminal apparatus can be effectively utilized. As a result, traffic on a transmission path can be lowered. Also, if an image contained in a homepage is updated, the portable terminal apparatus can certainly acquire the updated image even if the user does not require the image before the image is updated.
Next, a second embodiment of the present invention will be discussed.
Referring to FIG. 8, a portable terminal apparatus 30 comprises a cache memory 38 having an automatic overwrite prohibit region 38A where no automatic overwrite operation can be done, and an automatic overwrite available region 38B where an automatic overwrite operation can be done. The portable terminal apparatus 30 also includes an image registering unit 37 for registering an image in either the automatic overwrite prohibit region 38A or the automatic overwrite available region 38B of the cache memory 38. Only when a user of the portable terminal apparatus 30 executes a specified key operation for registering an image in the automatic overwrite prohibit region 38A, is the image registered therein. The user preferably registers an image which is contained in a home page that is 14 frequently acquired by the portable terminal apparatus 30. The registered image in the automatic overwrite prohibit region 38A can not be deleted without executing a specified key operation by the user.
The portable terminal apparatus 30 further comprises an image. registering information setting unit 31, a time registering information setting unit 32 and the browser 30A. The image registering information setting unit 31 sets image registering information with respect to each image registered in the cache memory 38. The image registering information indicates whether or not each of the images is registered in the automatic overwrite prohibit region 38A. The time registering information setting unit 32 sets time registering information indicative of the time when the image registering information is set by the image registering information setting unit 31, that is, when an image is registered in the automatic overwrite prohibit region 38A.
The browser 30A comprises a memory 33, a checking unit 34, a receiving unit 35 and a transmitting unit 36.
The image registering information set by the image registering information setting unit 31 and the time registering information set by the time registering information setting unit 32 are stored in the memory 33.
A uniform resource locator (URL) identifying the image is which is registered in the automatic overwrite prohibit region 38A is set as the image registering information in accordance with the time registering information indicative of the time when the image registering information is set. The checking unit 34 checks whether or not the URL identifying the image contained in the home page is coincident with the URL which is stored in the memory 33 as the image registering information, when the home page is received by the receiving unit 35 from the web server 2. The receiving unit 35 -receives the homepage and the image contained in the home page, which are transmitted from the web server 2. The transmitting unit 36 transmits a homepage request signal for requesting the web server 2 to transmit the homepage and an image request signal for requesting the web server 2 to transmit the image contained in the homepage. The homepage request signal and the image request signal include a URL identifying the homepage and the image, respectively. Further, the transmitting unit 36 transmits a check signal including the image registering information indicative of the URL identifying the image and the corresponding time information. The web server 2 comprises elements essentially the same as the elements shown in FIG. 6. 25 Next, operation of the communication system 16 according to the second embodiment of the present invention will be discussed with reference to FIG. 9.
The portable terminal apparatus 30 transmits a homepage request signal including a URL identifying a homepage to the web server 2 for acquiring a homepage (step 201). The web server 2 receives the homepage request signal, reads the requested homepage identified by the URL from the memory 22 and transmits the homepage to the portable terminal apparatus 30 (step 202) When the portable terminal apparatus receives the homepage from the web server 2, it is determined in the checking unit 34 whether or not a URL identifying an image contained in the home page transmitted from the web server 2 is coincident with a URL which is stored in the memory 33 as image registering information (step 203). An image identified by the stored URL is registered in the automatic overwrite prohibit region 38A of the cachememory 38. If the URL identifying the image contained in the transmitted homepage is not coincident with the stored URL, that is, the URL identifying the image contained in the transmitted homepage is not stored in the memory 33 as the image registering information, the portable terminal apparatus 30 transmits an image request signal including the URL identifying the image contained in the transmitted homepage to the web server 2 for 17 acquiring the image contained in the transmitted homepage (step 204). When the web server 2 receives the image request signal from the portable terminal apparatus 30, the web server 2 reads the requested image identified by the URL from the memory 22 and transmits the requested image to the portable terminal apparatus (step 205) on the other hand, in step 203, if the URL identifying the image contained in the homepage transmitted from the web server 2 is coincident with the URL stored in the memory 33, the portable terminal apparatus 30 transmits a -check signal to the web server 2 (step 206). When the web server 2 receives the check signal from the portable terminal apparatus 30, it is determined in the control unit 24 whether or not the image contained in the homepage has been updated after the time indicated by the time information contained in the check signal (step 207). If the image has not been updated after the time, the web server 2 transmits a nontransmission signal in lieu of the image contained in the homepage, wherein the image is not transmitted to the portable terminal apparatus 30 (step 208). When the portable terminal apparatus 30 receives the nontransmission signal, it is determined whether or not another image is contained in the transmitted homepage from the web server 2 (step 211) If another image is 18 not contained in the transmitted homepage, this procedure is completed (END) If another image is contained in the transmitted homepage, the procedure returns to step 203.
In step 207, if the image was updated after the time indicated by the time information contained in the check signal transmitted from the portable terminal apparatus 30 to the web server 2, the web server 2 transmits the updated image to the portable terminal apparatus 30 (step 209).
When the portable terminal apparatus 30 receives the requested image transmitted in step 205 or the updated image transmitted in step 209 from the web server 2, the image registering information setting unit 31 of the portable terminal apparatus 30 sets image registering information with respect'to the requested image or the updated image in accordance with the time information set by the time information setting unit 32, if necessary to the user (step 210).
After that, it is determined whether or not another- image is contained in the homepage transmitted from the web server 2 (step 211) If another image is not contained in the transmitted homepage, this procedure is completed (END). If another image is contained in the transmitted homepage, the procedure returns to step 203.
Since images frequently required by the user are not 19 deleted from the cache memory, the portable terminal apparatus can avoid an operation where the same image is received many times. As a result, its power consumption can be reduced and its utilization time can be extended.
The invention may be embodied in other specific.
forms without departing from the spirit or essential characteristics thereof. The present invention embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Each feature disclosed in this specification (which term includes the claims) and/or shown in the drawings may be incorporated in the invention independently of other disclosed and/or illustrated features.
The text of the abstract filed herewith is repeated here as part of the specification.
A homepage and an image contained in the homepage are received by a receiving unit. An operation specified by a user of a portable terminal apparatus is executed, whereby a locator, such as a URL, identifying the image which is not required by the user is stored in a memory. An image identified by the stored URL is not transmitted from a web server to the portable terminal apparatus when the corresponding homepage is requested.

Claims (6)

CLAIMS:
1. A web server for connection to a terminal device through a network, comprising: a receiver for receiving a homepage request signal, an image request signal and a check signal, wherein the homepage request signal includes a first locator identifying a homepage which is requested by the terminal device, the image request signal includes a second locator identifying an image contained, in the homepage, and the check signal includes a third locator identifying the image and time information; and, a transmitter for transmitting the homepage when the homepage request signal is received, the image when the image request signal is received, and a non-transmission signal in lieu of the image when the check signal is received and the image has not been updated after a time indicated by the time information.
2. The web server as claimed in claim 1, wherein said transmitter transmits the image when the check signal is received and the image has been updated after a time indicated by the time information.
3. A web server as in claim 1 or 2, connected via a network to a terminal device.
4. A computer program allowing communication between a terminal device and a web server through a 21 network, the program allowing the web server to: receive a homepage request signal, an image request signal and a check signal, the homepage request signal including a first locator identifying a homepage which is requested by the terminal device, the image request signal including a second locator identifying an image contained in the homepage, and the check signal including a third locator identifying the image and time information; and, transmit the homepage when the homepage request signal is received, transmit the image when the image request signal is received, and transmit a non- transmission signal in lieu of the image when the check signal is received and the image has not been updated after a time indicated by the time information.
5. A web server substantially as herein described with reference to and as shown in Figures 3 to 9.
6. A computer program substantially as herein described with reference to and as shown in Figures 3 to 9.
22
GB0101999A 1999-01-28 2000-01-28 Communication apparatus having a browser, web server, communication system and communication method thereof Expired - Fee Related GB2356780B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11020825A JP2000222327A (en) 1999-01-28 1999-01-28 Communication system and its method
GB0002038A GB2348576B (en) 1999-01-28 2000-01-28 Communication apparatus having a browser,web server,communication system and communication method thereof

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Publication Number Publication Date
GB0101999D0 GB0101999D0 (en) 2001-03-14
GB2356780A true GB2356780A (en) 2001-05-30
GB2356780B GB2356780B (en) 2001-08-29

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GB0101995A Expired - Fee Related GB2356779B (en) 1999-01-28 2000-01-28 Communication apparatus having a browser web server communication system and communtication method thereof

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Citations (4)

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JPH09190372A (en) * 1995-09-29 1997-07-22 Sony Corp Information management device and method
WO1997046955A1 (en) * 1996-06-07 1997-12-11 At & T Corp. Internet access system and method with active link status indicators
US5933851A (en) * 1995-09-29 1999-08-03 Sony Corporation Time-stamp and hash-based file modification monitor with multi-user notification and method thereof
GB2341249A (en) * 1998-08-17 2000-03-08 Connected Place Limited A method of generating a difference file defining differences between an updated file and a base file

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6119135A (en) * 1996-02-09 2000-09-12 At&T Corporation Method for passively browsing the internet using images extracted from web pages
US5961602A (en) * 1997-02-10 1999-10-05 International Business Machines Corporation Method for optimizing off-peak caching of web data

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09190372A (en) * 1995-09-29 1997-07-22 Sony Corp Information management device and method
US5933851A (en) * 1995-09-29 1999-08-03 Sony Corporation Time-stamp and hash-based file modification monitor with multi-user notification and method thereof
WO1997046955A1 (en) * 1996-06-07 1997-12-11 At & T Corp. Internet access system and method with active link status indicators
GB2341249A (en) * 1998-08-17 2000-03-08 Connected Place Limited A method of generating a difference file defining differences between an updated file and a base file

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GB2356780B (en) 2001-08-29
GB0101995D0 (en) 2001-03-14
GB2356779B (en) 2001-12-19
GB2356779A (en) 2001-05-30
GB0101999D0 (en) 2001-03-14

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