WO2001008378A1 - A system and method for providing immediate visual response to user input at a client system - Google Patents

A system and method for providing immediate visual response to user input at a client system Download PDF

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Publication number
WO2001008378A1
WO2001008378A1 PCT/US2000/019749 US0019749W WO0108378A1 WO 2001008378 A1 WO2001008378 A1 WO 2001008378A1 US 0019749 W US0019749 W US 0019749W WO 0108378 A1 WO0108378 A1 WO 0108378A1
Authority
WO
WIPO (PCT)
Prior art keywords
response
client
node
server
user input
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.)
Ceased
Application number
PCT/US2000/019749
Other languages
English (en)
French (fr)
Other versions
WO2001008378A9 (en
Inventor
Martin Duursma
Anatoliy Panasyuk
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.)
Citrix Systems Inc
Original Assignee
Citrix Systems Inc
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 to IL14775400A priority Critical patent/IL147754A0/xx
Priority to CA002380768A priority patent/CA2380768C/en
Priority to EP00947558A priority patent/EP1197055B1/en
Priority to AU61142/00A priority patent/AU775740B2/en
Priority to DE60033286T priority patent/DE60033286T2/de
Priority to HK02106936.2A priority patent/HK1045617B/en
Application filed by Citrix Systems Inc filed Critical Citrix Systems Inc
Priority to JP2001512762A priority patent/JP2003505781A/ja
Publication of WO2001008378A1 publication Critical patent/WO2001008378A1/en
Priority to IL147754A priority patent/IL147754A/en
Anticipated expiration legal-status Critical
Publication of WO2001008378A9 publication Critical patent/WO2001008378A9/en
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/16—Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs
    • 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]
    • H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
    • 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

Definitions

  • the invention relates generally to client-server computer networks. More specifically,
  • the invention relates to a system and method for providing feedback to user input at a client
  • Typical computer networks include client systems that communicate with server systems
  • the server system through a user interface operating on the client system.
  • LANs local area networks
  • WANs wide area networks
  • Intranets and the Internet
  • the time required for the client input to travel to the server system and for the server response to return to the client system causes a palpable delay that can disconcert the user and induce typing errors.
  • the round-trip delay may depend more upon
  • the invention features a method and an apparatus for reducing perceived visual response
  • the invention features a method that comprises receiving user input to be transmitted to the server node. In response to the user input, a prediction of a server response to
  • the invention features a client node comprising an input device that provides user input to be transmitted to a server node, a processor that produces a prediction of a
  • pointing device can be a keyboard or a pointing device.
  • the invention features a client-server system comprising a server
  • the client node includes an input device for providing user input, a
  • the processor transmits the user input to the server node and produces, in response to the user input, a client response that attempts to anticipate a server
  • the client response provides a visual response to
  • Fig. 1 is a diagram of an embodiment of a client system in communication with a server
  • Fig. 2 is a block diagram of a client-server system showing the communication paths
  • Fig. 3 is an exemplary flow diagram of an exemplary process by which the client node
  • Fig. 4 is an exemplary flow diagram of an exemplary process by which the client node
  • FIG. 1 shows a first computing system (client node) 10 in communication with a second computing system (client node) 10 in communication with a second computing system (client node) 10 in communication with a second computing system (client node) 10 in communication with a second computing system (client node) 10 in communication with a second computing system (client node) 10 in communication with a second computing system (client node) 10 in communication with a second computing system (client node) 10 in communication with a second
  • server node 14 over a communications network 18 for remotely executing an
  • the network 18 over which the client and server nodes 10, 14 communicate can be a local area
  • LAN local area network
  • WAN wide area network
  • telephone lines LAN or WAN links (e.g., Tl, T3, 56kb, X.25), broadband connections (ISDN,
  • LAN or WAN links e.g., Tl, T3, 56kb, X.25
  • ISDN broadband connections
  • communication protocols e.g., TCP/IP, IPX, SPX, NetBIOS, Ethernet, RS232, and direct
  • client nodes and server nodes may also be
  • the client node 10 communicates with the server node 14 using an
  • ICA Independent Computing Architecture
  • ICA is a general-purpose presentation services protocol that controls the
  • ICA input output between the client node 10 and server node 14.
  • the design of ICA is for the
  • user interface information such as windows application screen presentation, full-screen text
  • technique of the invention operates as a feature that accelerates standard ICA keyboard
  • ICA keyboard processing If a particular application program or input control cannot support the technique, the standard ICA keyboard processing is used.
  • Other embodiments can employ other remote control protocols, such as MICROSOFT RDP (Remote Desktop Protocol), to practice the principles of the invention.
  • MICROSOFT RDP Remote Desktop Protocol
  • the client node 10 can be any personal computer (e.g., 286, 386, 486, Pentium, Pentium II, Macintosh computer), thin-client device, windows and non-windows based terminal, network
  • main frame computer or any processor-based device capable of displaying application
  • the user interface displayed at the client node 10 can be text driven (e.g., the DOS
  • the operating system of the client node 10 can be one
  • WINDOWS 98 WINDOWS NT 3.51 , WINDOWS NT 4.0, Macintosh, Java, and Unix, DOS,
  • the client node 10 includes a display
  • a screen 22 22
  • a keyboard 24 24
  • a pointing device e.g., a mouse, trackball, touch-pad, touch-screen,
  • the server node 14 can be any computing device that controls access to other portions of
  • the network e.g., workstations, printers, etc.
  • runs applications in response to input received
  • the server node 14 can support a variety of
  • operating system platforms such as, for example, WINDOWS 3.x, WINDOWS 95, WINDOWS
  • the server node 14 can include a group of server systems logically acting as a single server system, called a server farm. In one embodiment, the server node 14 is a multi-user server system supporting multiple concurrently active client nodes.
  • the server node 14 hosts one or more application programs that can be accessed by the client node 10. Examples of such applications include browser software, e.g., MICROSOFT
  • MICROSOFT NOTEPAD® database programs such as MICROSOFT ACCESS®, and spreadsheet programs such as MICROSOFT EXCEL®, all of which are manufactured by
  • API application program interface
  • Server-side support may
  • the Active Accessibility API developed by Microsoft Corporation of Redmond, Washington, or equivalent proprietary APIs that allow information about the contents of a window to be extracted from the application in control of that window.
  • the Active Accessibility API developed by Microsoft Corporation of Redmond, Washington, or equivalent proprietary APIs that allow information about the contents of a window to be extracted from the application in control of that window.
  • the Active Accessibility API developed by Microsoft Corporation of Redmond, Washington, or equivalent proprietary APIs that allow information about the contents of a window to be extracted from the application in control of that window.
  • the Active Accessibility API developed by Microsoft Corporation of Redmond, Washington, or equivalent proprietary APIs that allow information about the contents of a window to be extracted from the application in control of that window.
  • Accessibility API models user interface elements as Component Object Model (COM) objects.
  • COM Component Object Model
  • a client is able to examine the properties of an object using provided functions such as
  • the client node 10 communicates with the server node 14 to remotely
  • Examples of user input, typically submitted by a user of the client node 10, include
  • the server node 14 In response to the user input, the server node 14 produces a server response that controls the content and appearance of the screen display of the client node 10 when subsequently
  • the type of the server response depends on the
  • the application program is a word processor and the input event is a keyboard input
  • the response can include information that
  • the server response can display a drop-down menu associated with that icon on the screen 22 of the
  • the client node 10 and server node 14 are communicating over a high-latency connection, the user may experience a palpable delay from the moment of entering
  • the client node 10 produces and displays a
  • the client node 10 response attempts to anticipate the server response that
  • Content for example, includes the specific text and graphical image that the server response is expected to display, such as the capital letter "T" and the drop-down menu of the
  • Attributes associated with appearance include, for example, the color of the displayed character (e.g., blue), the font size (e.g., 12), the font type (e.g., Times New
  • Fig. 2 shows an exemplary block diagram illustrating the information used by a client
  • response generator 30 to produce a client response 32 to a user-supplied input 34.
  • response generator 30 includes the processor of the client node 10 and the particular API routines
  • the client response generator Typically, the client response generator
  • server-supplied information 36 but if certain server-supplied information described below is unavailable, the client response generator 30 can use default information 38 instead.
  • the user-supplied input 34 is one of at least two types: (1) keyboard input or (2) a
  • pointing device input The user of the client node 10 supplies keyboard input by typing in
  • pointing device 28 Another type of pointing device input is the position of the cursor on the
  • client-side transport mechanism 33 In the embodiment depicted in FIG. 2, the client-side
  • transport mechanism 33 includes a transport driver that handles low-level network
  • a protocol driver that handles higher-level network communication (e.g. data link layer)
  • an ICA driver that handles formatting of data
  • the type of server-supplied information 36 depends on the type of user input. As described above, the input types include keyboard input and pointing device input. For keyboard input, the server-supplied information 36 includes a current input position and current font
  • the current input position is determined by current cursor position.
  • information defines the appearance (e.g., font size, style, color, type, etc.) of the client-generated
  • the server-supplied information 36 includes current input position information, as described above, and current screen object information. For example, if
  • the screen object information includes such information as
  • menu size and screen location number of menu elements, and size of menu elements.
  • the server node 14 obtains the current input position, font, and screen object information
  • the application program can use a standard operating system cursor handling routine or
  • the application program 40 either uses text output functions to draw the text in response to the keyboard input or supports a particular query API to
  • the client response generator 30 can use default information 38 to produce the client-generated response 32.
  • default information 38 for font can be predetermined
  • the application program 40 provides screen object information in a manner similar to providing current input position, that is, by using a system-supported routine for accessing such information or by supporting yet another particular query API, such as Iaccessible::accLocation
  • query APIs can be standard API, such as APIs in the Active
  • Accessibility interface developed by Microsoft, or proprietary APIs.
  • the type of server-supplied information 36 also depends on the operational state of the
  • the client response generator 30 can anticipate how the server node
  • the behavior of the Edit control is generally determined by a set of flags associated with the Edit control such as: ES_MULTILINE, which indicates that the control
  • ES_NUMBER which indicates that the control allows only digits
  • ES_CENTER which indicates that the entered text will be centered
  • the client response generator 30 can anticipate a number of characteristics
  • the client response generator 30 monitors the control by using a
  • cursor (caret) information is available to the client response generator 30.
  • cursor (caret) information is available to the client response generator 30.
  • font information may require that font information also be available to the client response generator 30.
  • the server node 14 can send the server-supplied information 36 to the client node 10 at
  • the server node 14 periodically sends information to the application program.
  • the server node 14 periodically sends information to the application program.
  • the server 14 may use a virtual channel set up using the ICA protocol to transmit the information.
  • the client 10 requests information
  • processor loading One point at which the client 10 may request information is when the server
  • the server 14 and client nodes 10 has minimal impact upon client user behavior because the
  • node 14 transmits a server response to the client node 14. Still other points can be when certain
  • trigger events occur during the execution of the application program 40, such as, for example,
  • the server node 14 can transmit to the client node the information 36 appropriate for that input field.
  • Fig. 3 shows an exemplary process of the invention by which the client node 10 and the
  • server node 14 cooperate to give a client user an immediate visual response for each character typed in at the keyboard 24 by the client user.
  • the responses appear character by character. Accordingly, the user should not visually discern any delay between the moment of supplying input to the moment of observing a response.
  • the client node 10 launches (step 40) an application program, and in
  • the server node 14 starts (step 44) execution of that application.
  • the application program is MICROSOFT NOTEPAD, which uses a Multi-line
  • the server node 14 transmits (step 48) application-specific information to the client
  • This information includes at least font information and current input position information.
  • the client node 10 At the keyboard, the client user types in the capital letter "T.”
  • the client node 10 At the keyboard, the client user types in the capital letter "T.”
  • step 52 receives (step 52) this keyboard input, and then, as described above, generates and displays (step 52).
  • response may also anticipate the visual attributes of the character, such as the font type, size, color, and current input position on the display screen. All of such visual attributes are
  • the client node 10 can use
  • the client node 10 transmits (step 60) the input character "T" to the server node 14.
  • the client node receives (step 64) a second character typed in by the
  • the client node 10 In a manner similar to the client-generated response for the letter “T,” the client node 10 generates and displays (step 68) a response for the character "e" on the
  • step 72 the client node 10 transmits the user input of the character "e"
  • the client node 10 After sending the character input to the server node 14, the client node 10 monitors for a
  • the server node 14 produces (step 76) the response to the character input "T,"
  • connection between the client and server nodes 10, 14 is longer than the time needed for the client node 10 to produce and display the client-generated response.
  • the client-generated response may appear on the screen before the server node 14 generates the server response or
  • client nodes is such that responses from the server node 14 lag behind responses displayed by the
  • client node 10 by multiple characters, as is illustrated by this example.
  • the client node 10 receives the server response for the letter "T” and updates (step 80) the display by overwriting the client-generated response with the server response. Because the
  • server response overwrites the client response, the server response does not need to exactly
  • the client node 10 can compare the client-generated response with the server response and then overwrite the client-generated response if the server response differs.
  • the server node 14 produces (step 84) a response to the character input "e,” and returns
  • the client node 10 updates the display screen regardless of
  • the client node 10 updates the display with the server-supplied response only if the client-generated response was wrong. As noted above, along with each transmission of a server response from the server node 14 to the client node 10, the server node 14 can be providing new
  • Fig. 4 provides another exemplary flow diagram of the process by which the client node
  • the client node 10 launches (step 100) an application program that starts executing
  • step 104 on the server node 14.
  • the server node 14 executes the MICROSOFT
  • the server node provides (step 108) application-specific
  • the application-specific information describes screen objects, such as the commands and toolbar icons that are displayed at the top of the MICROSOFT WORD window
  • node 10 can generate, using the current cursor position, which command or icon is selected when the client user clicks the pointing device 28. For example, a typical display of commands at the
  • Activation of the Edit command occurs by clicking the pointing device 28 while
  • step 112 the client node 10 receives this pointing device input. In anticipation of
  • the client node 10 generates and displays (step 116) a response, here a drop ⁇
  • the client node 10 transmits (step 120) the user input to the server node 14.
  • the client node 10 tracks (step 124) the cursor movement within the drop-down menu and highlights the menu item within which the current
  • step 1208 the server node 14 produces the actual response to the pointing
  • the client node 10 updates (step
  • the present invention may be implemented as one or more computer-readable software
  • a floppy disk a hard disk, hard-disk drive, a CD-
  • ROM read only memory
  • DVD-ROM a DVD-ROM
  • flash memory card an EEPOM, an EPROM, a PROM, a RAM, a ROM,
  • programs may be stored on or in one or more articles of manufacture as source code, object code,
  • interpretive code or executable code.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • User Interface Of Digital Computer (AREA)
  • Information Transfer Between Computers (AREA)
  • Computer And Data Communications (AREA)
PCT/US2000/019749 1999-07-23 2000-07-20 A system and method for providing immediate visual response to user input at a client system Ceased WO2001008378A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
CA002380768A CA2380768C (en) 1999-07-23 2000-07-20 A system and method for providing immediate visual response to user input at a client system
EP00947558A EP1197055B1 (en) 1999-07-23 2000-07-20 A system and method for providing immediate visual response to user input at a client system
AU61142/00A AU775740B2 (en) 1999-07-23 2000-07-20 A system and method for providing immediate visual response to user input at a client system
DE60033286T DE60033286T2 (de) 1999-07-23 2000-07-20 System und verfahren zur bereitstellung einer unmittelbaren visuellen antwort auf eine benutzereingabe in einem anwendersystem
HK02106936.2A HK1045617B (en) 1999-07-23 2000-07-20 A system and method for providing immediate visual response to user input at a client system
IL14775400A IL147754A0 (en) 1999-07-23 2000-07-20 A system and method for providing immediate visual response to user input at a client system
JP2001512762A JP2003505781A (ja) 1999-07-23 2000-07-20 ユーザ入力に対する即時の視覚的応答をクライアントシステムにおいて提供するシステムおよび方法
IL147754A IL147754A (en) 1999-07-23 2002-01-21 System and method for providing immediate visual response to user input at a client system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/360,876 US6538667B1 (en) 1999-07-23 1999-07-23 System and method for providing immediate visual response to user input at a client system connected to a computer system by a high-latency connection
US09/360,876 1999-07-23

Publications (2)

Publication Number Publication Date
WO2001008378A1 true WO2001008378A1 (en) 2001-02-01
WO2001008378A9 WO2001008378A9 (en) 2002-08-29

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PCT/US2000/019749 Ceased WO2001008378A1 (en) 1999-07-23 2000-07-20 A system and method for providing immediate visual response to user input at a client system

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US (1) US6538667B1 (https=)
EP (1) EP1197055B1 (https=)
JP (1) JP2003505781A (https=)
KR (1) KR100798963B1 (https=)
AU (1) AU775740B2 (https=)
CA (1) CA2380768C (https=)
DE (1) DE60033286T2 (https=)
ES (1) ES2281349T3 (https=)
HK (1) HK1045617B (https=)
IL (2) IL147754A0 (https=)
WO (1) WO2001008378A1 (https=)

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