US20120303988A1 - Data processing apparatus and data processing method - Google Patents
Data processing apparatus and data processing method Download PDFInfo
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- US20120303988A1 US20120303988A1 US13/567,906 US201213567906A US2012303988A1 US 20120303988 A1 US20120303988 A1 US 20120303988A1 US 201213567906 A US201213567906 A US 201213567906A US 2012303988 A1 US2012303988 A1 US 2012303988A1
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- packet
- pattern
- data processing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
- B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Facsimiles In General (AREA)
- Control Or Security For Electrophotography (AREA)
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Abstract
When a packet received in a deep sleep mode matches a packet stored in a WOL-pattern storage region, a network portion performs reply processing suited for the matched packet after returning a power supply mode of a power supply unit from the deep sleep mode to a normal mode. When the packet received in the deep sleep mode matches a packet stored in a proxy-response-pattern storage region, the network portion performs reply processing suited for the matched packet while maintaining the power supply mode of the power supply unit at the deep sleep mode.
Description
- This application is a continuation of application Ser. No. 12/339,690 filed Dec. 19, 2008 that claims the benefit of Japanese Patent Application No. 2007-328732 filed Dec. 20, 2007, both of which are hereby incorporated by reference in their entirety.
- 1. Field of the Invention
- The present invention relates to a data processing apparatus and data processing method, more specifically, reducing power consumption and an enhancing processing speed by use of a proper operation.
- 2. Description of the Related Art
- In the field of data processing apparatuses, such as printers or copiers, there is a growing need to reduce power consumption in a state where the apparatus does not operate (inactive state). One known approach to the need is a technique for reducing power consumption in an inactive state by decreasing (or interrupting) supplying a power to a main controller controlling a data processing apparatus in the inactive state of the data processing apparatus.
- The function of connecting to a network is being embedded in data processing apparatuses as a standard feature. A data processing apparatus capable of connecting to a network can perform various kinds of data processing by receiving data and a command from an information processing apparatus, such as a personal computer, over the network and processing the data and command.
- When a technique for reducing power consumption is applied to a data processing apparatus having the function of connecting to a network, a problem arises in which it is difficult for the data processing apparatus to quickly perform processing for data and a command received over the network in its inactive state. For example, a case is discussed where a power supplied to a main controller of the data processing apparatus is made smaller than that in a normal state (or interrupted) in an inactive state of the data processing apparatus. In this case, when the data or command is received over the network in the inactive state, the main controller is not operating. Because of this, the data or command remains unprocessed until the inactive state becomes active in response to restarting of supplying the power to the main controller.
- When a technique for reducing power consumption is applied to a data processing apparatus having the function of connecting to a network, another problem arises. That is, if the data processing apparatus frequently receives data or commands, the data processing apparatus returns from an inactive state to an active state, and thus the advantageous effects of reducing power consumption are undesirably small.
- There is a known technique of interrupting supplying a power to a main controller in an inactive state of a data processing apparatus while continuing supplying a power to a sub controller to process data or a command received by the sub controller over a network (see, for example, Japanese Patent Laid-Open No. 2006-025212). The technique disclosed in this patent document can achieve both a reduction in power consumption by interrupting supplying a power to a main controller of a data processing apparatus and an enhancement in processing speed for data or a command received over a network by a sub controller performing the processing.
- For the technique disclosed in the above-mentioned Japanese Patent Laid-Open No. 2006-025212, a packet pattern that requires the data processing apparatus to return from an inactive state to an active state is stored in advance in a region to which the sub controller can refer, and the sub controller causes the data processing apparatus to return from the inactive state to the active state when a packet pattern received over the network matches the previously stored packet pattern.
- However, with the technique disclosed in the above-mentioned Japanese Patent Laid-Open No. 2006-025212, a packet pattern is stored in advance in a region to which the sub controller can refer, so a new packet pattern cannot be registered. Even if registering a new packet pattern is made possible, the number of packet patterns that can be registered depends on the amount of a storage area. Further, even if a new packet pattern can be registered in advance, it is difficult to determine in advance which packet pattern is to be registered in a region to which the sub controller can refer. This is because it is difficult for a user of the data processing apparatus to know in advance what kind of packet pattern is frequently used in accordance with a network environment where the data processing apparatus is placed.
- An embodiment of the present invention provides an improved data processing apparatus and data processing method.
- An aspect of the present invention can provide a data processing apparatus capable of communicating with a computer terminal over a network. The data processing apparatus includes a packet processing unit configured to receive a packet transmitted from the computer terminal and perform reply processing to the packet, a control unit configured to control the data processing apparatus, a power supplying unit configured to supply power in either one of a normal mode in which the power supplying unit supplies power to both the control unit and the packet processing unit and a power-saving mode in which the power supplying unit supplies power to the packet processing unit while supplying less power than the power supplied in the normal mode to the control unit, and a storage unit configured to store a packet in a storage region to which the packet processing unit is capable of accessing in the power-saving mode. The packet processing unit is configured to, when a type of a packet received by the packet processing unit in the power-saving mode matches a type of a first packet stored in the storage region, perform reply processing suited for the matched packet after returning a power supply mode in which the power supplying unit operates from the power-saving mode to the normal mode and to, when a type of the packet received by the packet processing unit in the power-saving mode matches a packet stored in the storage region, perform reply processing suited for the matched packet while maintaining the power supply mode in which the power supplying unit operates at the power-saving mode. The storage unit is configured to change a type of a specific packet stored in the storage region from the type of the first packet to the type of the second packet, in response to a specific status of a reception state in which the specific packet is received by the packet processing unit.
- Different embodiments of the present invention can be made without departing from the spirit and scope thereof, it is to be understood that the invention is not limited to the specific embodiments thereof except as defined in the appended claims.
- Further features of the present invention will become apparent from the following description of exemplary embodiments (with reference to the attached drawings).
- The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate numerous embodiments, features and aspects of the invention and, together with the description, serve to explain the principles of the invention.
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FIG. 1 is a block diagram of a printing system. -
FIG. 2 schematically illustrates a configuration of an image forming apparatus. -
FIG. 3 is a block diagram that illustrates a configuration of a controller unit. -
FIG. 4 is a block diagram that illustrates an example of a configuration of a network portion. -
FIG. 5 is a flowchart illustrating a process performed by the image forming apparatus. -
FIG. 6 illustrates one example of a packet received by the network portion from a personal computer (PC) over a local area network (LAN). -
FIG. 7 illustrates one example of a packet received by the network portion from the PC over the LAN. -
FIG. 8 illustrates examples of packet patterns stored in a WOL-pattern storage region. -
FIG. 9 illustrates examples of packet patterns stored in a proxy-response-pattern storage region. -
FIG. 10 illustrates one example of a response pattern. -
FIG. 11 illustrates one example of proxy response data. -
FIG. 12 illustrates one example of a response pattern. -
FIG. 13 is a block diagram that illustrates another example of the configuration of the network portion. -
FIG. 14 illustrates one example of information that is referred to in order to switch a WOL pattern to a proxy response pattern. -
FIG. 15 is a flowchart illustrating a process performed by the image forming apparatus. -
FIG. 16 illustrates one example of an operating screen of an operating portion of the image forming apparatus. -
FIG. 17 is a flowchart illustrating a process performed by another image forming apparatus. - The present invention will now be described in detail with reference to the drawings showing a various embodiment thereof. In the drawings, elements and parts which are identical throughout the views are designated by identical reference numerals, and duplicate description thereof is omitted.
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FIG. 1 is a block diagram that illustrates a configuration of a printing system including a data processing apparatus according to a first embodiment of the present invention. - Referring to
FIG. 1 , aprinting system 100 includesimage forming apparatuses - The
image forming apparatuses 220 and 230 (data processing apparatuses) have substantially the same configuration. ThePCs 212 and 213 have substantially the same configuration. Thus, theimage forming apparatus 220 and the PC 212 are described below. - The
image forming apparatus 220 includes anoperating portion 140 through which a user of theimage forming apparatus 220 can perform various operations, ascanner portion 10 configured to read image information in response to an instruction from theoperating portion 140, and aprinter portion 20 configured to print image data on a sheet. Theimage forming apparatus 220 further includes acontroller unit 30 configured to control thescanner portion 10 and theprinter portion 20 on the basis of an instruction from theoperating portion 140 and the PC 212. - The PC 212 transmits a print job including image data of one or more pages to the
image forming apparatus 220 over theLAN 501. The PC 212 transmits to theimage forming apparatus 220 various commands in addition to the print job. - The
image forming apparatus 220 receives a print job from the PC 212 over theLAN 501 and prints the image data included in the print job on a sheet. -
FIG. 2 schematically illustrates a configuration of theimage forming apparatus 220 shown inFIG. 1 . - The
image forming apparatus 220 shown inFIG. 2 includes thescanner portion 10, theprinter portion 20, thecontroller unit 30, apower supply unit 40 configured to generate a direct-current (DC) power from an alternating-current (AC) power, and the operatingportion 140 being an interface for inputting an operation from a user. - The
scanner portion 10 includes aplaten glass 101 on which an original is placed and anautomatic document feeder 146 for sequentially conveying originals to a predetermined place. Thescanner portion 10 exposes and scans an original placed on theplaten glass 101 while moving the original in a main-scanning direction. Thescanner portion 10 further includes an original illuminatinglamp 102, ascanning mirror 103, ascanning unit 147 disposed below theplaten glass 101, and scanning mirrors 104 and 105 configured to reflect light that has been reflected from thescanning mirror 103 toward a charge-coupled device (CCD)unit 106. Thescanner portion 10 further includes ascanning unit 148 configured to scan an original moving in a sub-scanning direction at one half the speed of thescanning unit 147 and an image-forminglens 107 configured to receive light reflected from thescanning mirror 105. Thescanner portion 10 further includes theCCD unit 106 including animage sensor 108 and aCCD driver 109 configured to drive theimage sensor 108. Theimage sensor 108 is composed of CCDs and configured to convert a formed image into, for example, an 8-bit digital image signal. - The
controller unit 30 receives an instruction from the operatingportion 140, generates image data based on an image signal output from theimage sensor 108, and controls the entire apparatus. The details are described below with reference toFIG. 3 . - The
printer portion 20 includes aphotosensitive drum 110 and forms an electrostatic latent image by exposing thephotosensitive drum 110 on the basis of image data generated by thecontroller unit 30. Theprinter portion 20 further includes an exposingportion 117 composed of, for example, a semiconductor laser and adeveloper 118 holding black toner and being configured to develop the electrostatic latent image on thephotosensitive drum 110 using the toner. Theprinter portion 20 further includes apre-transfer charger 119 configured to apply a high voltage to the toner image developed on thephotosensitive drum 110 before the toner image is transferred. - The
printer portion 20 further includes amanual feeding unit 120 and feedingunits printer portion 20 further includes feedingrollers manual feeding unit 120 and the feedingunits printer portion 20 further includes aregistration roller 126 configured to feed sheets conveyed from the feedingrollers photosensitive drum 110. The feedingrollers manual feeding unit 120 and the feedingunits registration roller 126 and then restart conveying so as to coincide with the timing of writing the toner image developed on thephotosensitive drum 110. - The
printer portion 20 further includes atransfer charger 127 configured to transfer the toner image developed on thephotosensitive drum 110 to a fed sheet and a detachcharger 128 configured to detach, from thephotosensitive drum 110, the sheet to which the toner image is transferred from thephotosensitive drum 110. Theprinter portion 20 further includes a conveyingbelt 129 configured to convey the detached sheet to afixing device 130, which will be described below, and a cleaner 111 configured to recover toner remaining on thephotosensitive drum 110 without being transferred. Theprinter portion 20 further includes apre-exposure lamp 112 configured to eliminate static from thephotosensitive drum 110 and aprimary charger 113 configured to uniformly charge thephotosensitive drum 110. - The
printer portion 20 further includes the fixingdevice 130 configured to fix the toner image transferred to the sheet and asorter 132 configured to receive the sheet on which the toner image is fixed via aflapper 131. Theprinter portion 20 further includes anintermediate tray 137 configured to receive the sheet on which the toner image is fixed via theflapper 131 and feedingrollers 133 to 136. Theprinter portion 20 further includes are-feeding roller 138 configured to re-convey the sheet placed in theintermediate tray 137 to thephotosensitive drum 110. Theflapper 131 is configured to switch a destination of the sheet on which the toner image is fixed between thesorter 132 and theintermediate tray 137. The feedingrollers 133 to 136 are configured to non-reverse the sheet on which the toner image is fixed (for multiple printing) or reverse it (for duplex printing). -
FIG. 3 is a block diagram that illustrates a configuration of thecontroller unit 30 shown inFIG. 2 . - Referring to
FIG. 3 , thecontroller unit 30 is connected to thescanner portion 10, theprinter portion 20, theLAN 501, and a public line and is used to receive and output image data and device information. - The
controller unit 30 includes a raster image processor (RIP) 360 configured to convert a page-description language (PDL) code contained in a print job received from, for example, the PC 212 into a bitmapped image. Thecontroller unit 30 further includes ascanner image processor 380 configured to correct, process, and edit image data input from thescanner portion 10. Thecontroller unit 30 further includes aprinter image processor 390 configured to correct image data to be output (printed) by theprinter portion 20 and to covert resolution thereof and animage rotating portion 330 configured to rotate image data. Thecontroller unit 30 further includes animage compressing portion 340 configured to compress and decompress multivalued image data with joint photographic experts group (JPEG) and binary image data with joint bi-level image experts group (JBIG), modified modified READ (MMR), or modified Huffman (MH). Thecontroller unit 30 further includes a device I/F 320 configured to connect thescanner portion 10, theprinter portion 20, and thecontroller unit 30 and to convert image data synchronously or asynchronously. Thecontroller unit 30 further includes animage bus 308 configured to connect these components and to allow image data to be transferred thereamong at a high speed. - The
controller unit 30 further includes a central processing unit (CPU) 301 being a controller (control unit) controlling theimage forming apparatus 220 and a random-access memory (RAM) 302 being a system work memory for use in operating theCPU 301 and also being an image memory for use in temporarily storing image data. Thecontroller unit 30 further includes an operation-portion I/F 307 being an interface to the operatingportion 140, being configured to output to the operatingportion 140 image data to be displayed on the operatingportion 140, and serving to convey information input from a user of the system through the operatingportion 140 to theCPU 301. Thecontroller unit 30 further includes a network portion 310 (packet processing unit) connected to theLAN 501 and configured to communicate (perform transmission and reception) with thePCs 212 and 213. Thecontroller unit 30 further includes amodem portion 350 connected to the public line and configured to perform data communication (transmission and reception) with an external facsimile machine. Thenetwork portion 310 is configured to receive data from thePCs 212 and 213 and process the received data. Thecontroller unit 30 further includes a read-only memory (ROM) 303 in which a boot program executable by theCPU 301 is stored and a hard disk drive (HDD) 304 configured to store system software, image data, and counter values of software. Thecontroller unit 30 further includes a scanner/printer communication I/F 306 configured to communicate with the CPU of each of thescanner portion 10 and theprinter portion 20. Thecontroller unit 30 also includes asystem bus 309 configured to connect the components described above. - The
controller unit 30 further includes an image bus I/F 305 being a bus bridge connecting thesystem bus 309 and theimage bus 308 and configured to convert a data structure. Thecontroller unit 30 further includes a power-supply ON/OFF portion 41 configured to supply a DC power received from the power supply unit 40 (power supplying unit) through apower supply line 42 to a predetermined circuit element of thecontroller unit 30 throughpower supply lines OFF portion 41 is controlled on the basis of a control signal received from thenetwork portion 310 through acontrol signal line 45 and a control signal received from theCPU 301 through acontrol signal line 46. The power-supply ON/OFF portion 41 is configured to selectively turn ON and OFF thepower supply lines power supply line 43 is connected to theCPU 301, theROM 303, theHDD 304, the image bus I/F 305, and the scanner/printer communication I/F 306. Thepower supply line 43 is also connected to the device I/F 320, theimage rotating portion 330, theimage compressing portion 340, theRIP 360, thescanner image processor 380, and theprinter image processor 390. Thepower supply line 44 is connected to theRAM 302, the operation-portion I/F 307, thenetwork portion 310, and themodem portion 350. - The
image forming apparatus 220 illustrated in FIG. 1 executes print processing on the basis of a print job transmitted from the PC 212 connected to theLAN 501 in the way described below. TheCPU 301 stores print data being image data received from the PC 212 connected to theLAN 501 through thenetwork portion 310 in theRAM 302. The image data is supplied to theRIP 360 through the image bus I/F 305. TheRIP 360 converts the image data (PDL code) into bitmapped data. Theimage compressing portion 340 compresses the bitmapped data, and the compressed data is stored in theHDD 304. Then, the image data stored in the HDD 304 (compressed bitmapped data) is supplied to theimage compressing portion 340 through the image bus I/F 305. Theimage compressing portion 340 decompresses the supplied image data (compressed bitmapped data). Theprinter image processor 390 corrects the image data for the printer and converts the resolution thereof. Theimage rotating portion 330 rotates the image data if needed. Subsequently, the image data subjected to the above processing is transmitted as print data to theprinter portion 20 through the device I/F 320, and theprinter portion 20 prints the image data on a sheet. - The
image forming apparatus 220 can operate in the deep sleep mode, which is one of power saving modes. In the normal mode, thepower supply unit 40 supplies a power to the power-supply ON/OFF portion 41 through thepower supply line 42, and theCPU 301 controls the power-supply ON/OFF portion 41 such that both thepower supply lines power supply unit 40 to both theCPU 301 and thenetwork portion 310. In the deep sleep mode, thepower supply unit 40 supplies a power to the power-supply ON/OFF portion 41 through thepower supply line 42, and theCPU 301 controls the power-supply ON/OFF portion 41 such that thepower supply line 43 is in an OFF state and thepower supply line 44 is in an ON state. At this time, supplying a power to a main circuit element including theCPU 301 of thecontroller unit 30 is interrupted. Accordingly, power consumption of theimage forming apparatus 220 can be significantly reduced. Additionally, when thenetwork portion 310 receives data, such as a print job, from the PC 212 or other apparatus, thenetwork portion 310 can control the power-supply ON/OFF portion 41 so as to cause theimage forming apparatus 220 to return to the normal mode. In the foregoing description, in the deep sleep mode, supplying a power to theCPU 301 is interrupted. However, other forms may also be applicable. For example, supplying a power to theCPU 301 in the deep sleep mode can also be made smaller than that in the normal mode. In this case, processing executable by theCPU 301 in the deep sleep mode is more limited than that in the normal mode. The limitation of the executable processing contains at least processing for data received by thenetwork portion 310 from, for example, the PC 212. - In the deep sleep mode, because the
RAM 302 receives a power from thepower supply unit 40, theRAM 302 performs self-refreshing and backs up a system program. - In the foregoing description, the
network portion 310 switches the power-supply mode from the deep sleep mode to the normal mode. However, other forms may also be applicable. Specifically, in place of thenetwork portion 310, themodem portion 350 or the operation-portion I/F 307 may also switch the power supply mode from the deep sleep mode to the normal mode. In the case of themodem portion 350, facsimile communication using a public line can be performed. In the case of the operation-portion I/F 307, an instruction from a user who uses the operation-portion I/F 307 can be received. - The
image forming apparatus 220 shown inFIG. 1 returns from the deep sleep mode to the normal mode in the way described below. - When the
network portion 310 receives a print job from, for example, the PC 212, thenetwork portion 310 analyzes whether a packet received as the print job contains a data sequence corresponding to a physical address unique to the apparatus to which thenetwork portion 310 belongs. If thenetwork portion 310 detects the data sequence corresponding to the apparatus, thenetwork portion 310 controls the power-supply ON/OFF portion 41 through thecontrol signal line 45 so as to turn on thepower supply line 43 and thus activates theCPU 30. At this time, theCPU 301 determines from the power-supply ON/OFF portion 41 whether its activation is caused by returning from the deep sleep mode to the normal mode. If theCPU 301 determines that its activation is caused by returning from the deep sleep mode to the normal mode, theCPU 301 starts a boot sequence. At this time, theCPU 301 omits a sequence to download a system program from theHDD 304 into theRAM 302 and employs a system program backed up in theRAM 302 in moving to the deep sleep mode. Thecontroller unit 30 is thus made to operate in the normal mode, and in response to the print job from the PC 212, thecontroller unit 30 causes theprinter portion 20 to start outputting for printing. -
FIG. 4 is a block diagram that illustrates one example of a configuration of thenetwork portion 310. - The
network portion 310 includes a WOL-pattern detector 401, a proxy-response-pattern detector 402, a proxy-response transmitter 403, adata transfer processor 404, and an electrically erasable programmable ROM (EEPROM) 405 (storage unit). TheEEPROM 405 has a plurality of storage regions, i.e., a WOL-pattern storage region 406 (first storage region), a proxy-response-pattern storage region 407 (second storage region), and a proxy-response-data storage region 408 (third storage region). TheEEPROM 405 is a non-volatile memory storing a packet recognizable by thenetwork portion 310, and the content thereof is rewritable. - The WOL-
pattern detector 401 detects whether, in the deep sleep mode, a packet received over theLAN 501 matches a packet pattern registered in the WOL-pattern storage region 406 of theEEPROM 405. Packet patterns registered in the WOL-pattern storage region 406 are called Wake On LAN (WOL) packets. If the WOL-pattern detector 401 detects a WOL packet, the WOL-pattern detector 401 provides thepower supply unit 40 with an instruction to cause the power-supply ON/OFF portion 41 to restart supplying a power to theCPU 301 and other elements through thepower supply line 43. - The proxy-response-
pattern detector 402 detects whether, in the deep sleep mode, a packet received over theLAN 501 matches a packet pattern registered in the proxy-response-pattern storage region 407 of theEEPROM 405. Packet patterns registered in the proxy-response-pattern storage region 407 are ones used for replying to the received packet using response data stored in the proxy-response-data storage region 408 without restarting of supplying a power to theCPU 301. If the proxy-response-pattern detector 402 detects a proxy response pattern, the proxy-response-pattern detector 402 reads proxy response data associated with the detected proxy response pattern from the proxy-response-data storage region 408. Then, the proxy-response-pattern detector 402 provides thedata transfer processor 404 with an instruction to transmit the proxy response data to a source that transmitted the packet over theLAN 501. Even when the proxy-response-pattern detector 402 detects the proxy response pattern, the proxy-response-pattern detector 402 does not provide thepower supply unit 40 with an instruction to cause the power-supply ON/OFF portion 41 to restart supplying a power to theCPU 301 and other elements through thepower supply line 43. Accordingly, theimage forming apparatus 220 can perform reply processing in response to receiving the proxy response pattern while maintaining its power saving mode without returning from the power saving mode to the normal mode. - An operation of the
image forming apparatus 220 is described below with reference toFIGS. 5 to 10 . -
FIG. 5 is a flowchart illustrating a process performed by theimage forming apparatus 220. - Steps illustrated in
FIG. 5 are executed by theCPU 301 reading a program from theHDD 304 or theROM 303 into theRAM 302, except that steps S503, S504, S513, and S514 are executed by thenetwork portion 310 in the deep sleep mode at which a power is not supplied to theCPU 301. Thenetwork portion 310 includes a CPU (not shown), and thecomponents 401 to 404 are executed by software processing performed by the CPU. Alternatively, each of thecomponents 401 to 404 may also be composed of a hardware circuit. -
FIGS. 6 and 7 illustrate examples of a packet received by thenetwork portion 310 over theLAN 501 from the PC 212. InFIGS. 6 and 7 , Destination Ether Address indicates the physical address of theimage forming apparatus 220; Source Ether Address indicates the physical address of the PC 212; Destination IP Address indicates the Internet Protocol (IP) address of theimage forming apparatus 220; Source IP Address indicates the IP address of the PC 212. Data Type in each ofFIGS. 6 and 7 indicates that the status is requested. Specific status types requested inFIG. 6 are the amount of toner remaining and the amount of paper left in the first cassette (feeding unit 122); those inFIG. 7 are the amount of paper left in the second cassette (feeding unit 123) and that in the third cassette (feeding unit 124).FIG. 8 illustrates examples of packet patterns stored in the WOL-pattern storage region 406 and shows that a packet pattern of a status request for the amount of paper left in the second cassette and a packet pattern of a status request for the amount of paper left in the third cassette are stored.FIG. 9 illustrates examples of packet patterns stored in the proxy-response-pattern storage region 407 and shows that a packet pattern of a status request for the amount of toner remaining and a packet pattern of a status request for the amount of paper left in the first cassette are stored. - The
image forming apparatus 220 begins its operation in response to turning on the main switch (not shown) being a power-supply source switch of theimage forming apparatus 220. When the main switch SW is turned on, the power supply unit 40 (power supplying unit) starts supplying a power to thecontroller unit 30. The power-supply ON/OFF portion 41 starts supplying a power to thepower supply lines controller unit 30 reads the boot program stored in theROM 303 and starts executing the boot sequence. The system program to be executed by theimage forming apparatus 220 is stored in theHDD 304 and is read from theHDD 304 in accordance with the above-described boot sequence. The read program is written in theRAM 302. In response to execution of the system program in theRAM 302 by theCPU 301, a series of operations of theimage forming apparatus 220 is started. Steps illustrated inFIG. 5 are started by execution of the system program described above. - In step S501, the
CPU 301 determines whether a condition for moving theimage forming apparatus 220 to the deep sleep mode is satisfied. For example, when a state in which thenetwork portion 310 receives no packet continues for a preset period of time (e.g., 15 minutes) after the completion of printing processing of theimage forming apparatus 220, theCPU 301 determines that the condition for moving to the deep sleep mode is satisfied. - In step S502, the
CPU 301 issues the power-supply ON/OFF portion 41 through thecontrol signal line 46 with an instruction to interrupt supplying the power through thepower supply line 43. When the power-supply ON/OFF portion 41 receives the instruction from theCPU 301, the power-supply ON/OFF portion 41 turns thepower supply line 43 off and moves theimage forming apparatus 220 to the deep sleep mode, at which the power is not supplied to a part of thecontroller unit 30. At this time, theCPU 301 notifies the PC 212 through thenetwork portion 310 of switching to the deep sleep mode. This is because theimage forming apparatus 220 may be unable to reply to a packet received from the PC 212 due to not supplying the power to theCPU 301 during the deep sleep mode. TheCPU 301 stores data corresponding to a packet pattern stored in the proxy-response-pattern storage region 407 in the proxy-response-data storage region 408 when being moved to the deep sleep mode. Because the amount of paper left in the first cassette is registered as a packet pattern inFIG. 9 , information indicating the presence/absence of paper detected as the amount of paper left in thefeeding unit 122 by a sensor (not shown) provided on thefeeding unit 122 is stored in the proxy-response-data storage region 408. Because the amount of toner remaining is registered as a packet pattern inFIG. 9 , information indicating the amount of toner remaining detected as the remaining amount of toner accommodated in thedeveloper 118 by a sensor (not shown) provided on thedeveloper 118 is stored in the proxy-response-data storage region 408. - In step S503, the WOL-
pattern detector 401 of thenetwork portion 310 detects whether a packet received from the PC 212 orPC 213 over theLAN 501 matches a WOL pattern stored in the WOL-pattern storage region 406. Because the patterns shown inFIG. 8 are stored in the WOL-pattern storage region 406 of thenetwork portion 310, when the packet for the status request shown inFIG. 6 is received from the PC 212, thenetwork portion 310 determines NO (in step S503), and flow proceeds to step S513. When the packet for the status request shown inFIG. 7 is received from the PC 212, thenetwork portion 310 determines YES (in step S503), and flow proceeds to step S504. - In step S504, in response to the detection of the WOL pattern, the
network portion 310 provides the power-supply ON/OFF portion 41 through thecontrol signal line 45 with an instruction to restart supplying a power through thepower supply line 43. When the power-supply ON/OFF portion 41 receives the instruction, the power-supply ON/OFF portion 41 turns thepower supply line 43 on and returns theimage forming apparatus 220 from the deep sleep mode, at which the power is not supplied to a part of thecontroller unit 30, to the normal mode. - In step S505 (first executing step), the
CPU 301 performs reply processing for the WOL pattern detected in step S503. In the example illustrated inFIG. 8 , the status request for the amount of paper left in the second cassette and that in the third cassette is made. Thus, a response packet illustrated inFIG. 10 is generated on the basis of information indicating the presence/absence of paper detected as the amount of paper left in each of the feedingunits CPU 301 instructs thenetwork portion 310 to transmit the response packet illustrated inFIG. 10 to the PC 212. - In step S506, the
CPU 301 adds one to the number of receptions of the WOL pattern detected in step S503 (increments the number of receptions by one). The number of receptions of the WOL pattern has been stored in theHDD 304. - In step S507, the
CPU 301 determines whether the number of receptions of the WOL pattern incremented in step S506 exceeds a certain value (e.g., 20). If it is exceeded (YES in step S507), flow proceeds to step S508; otherwise (NO in step S507), the processing is completed and returns to step S501. - In step S508, the
CPU 301 determines whether a space where the WOL pattern determined to be received more than a predetermined number of times in step S507 can be stored as a proxy response pattern is present in the proxy-response-pattern storage region 407. If theCPU 301 determines that such an available space is present (YES in step S508), flow proceeds to step S509. If theCPU 301 determines that there is no such an available space (NO in step S508), flow proceeds to step S511. - In step S509, the
CPU 301 stores the WOL pattern detected in step S503 in the proxy-response-pattern storage region 407. In step S510, theCPU 301 deletes the WOL pattern detected in step S503 from the WOL-pattern storage region 406. - In step S511, the
CPU 301 deletes, from the proxy-response-pattern storage region 407, a less frequently received proxy response pattern. For example, a case is discussed where, when the proxy response patterns illustrated inFIG. 9 are stored in the proxy-response-pattern storage region 407, the number of receptions of the status request for the amount of toner remaining is 15 and that of the status request for the amount of paper left in the first cassette is 5. In this case, because the number of receptions of the status request for the amount of paper left in the first cassette is small, the packet pattern relating to the amount of paper left in the first cassette is deleted from the proxy-response-pattern storage region 407. In the foregoing description, a less frequently received packet pattern is deleted from the proxy-response-pattern storage region 407. However, other forms may also be applied. For example, among a plurality of packet patterns stored in the proxy-response-pattern storage region 407, a least recently stored packet pattern may be deleted. Alternatively, for example, a packet pattern that has been received a smallest number of times in a certain period (e.g., past one week) may be deleted. - In step S512, the
CPU 301 stores the WOL pattern detected in step S503 in the proxy-response-pattern storage region 407. - Through steps S509 to S512, a WOL pattern that is received more than a predetermined number of times can be stored as a proxy response pattern. This is useful for when the status request from the PC 212 (e.g., request for the amount of paper left in the second cassette (feeding unit 123)) is frequently received. Specifically, the image forming apparatus enables the
network portion 310 to perform reply processing while maintaining the deep sleep mode without returning from the deep sleep mode to the normal mode. - The processing occurring when the WOL pattern is not detected in step S503 is described next.
- In step S513, the proxy-response-
pattern detector 402 of thenetwork portion 310 detects whether the packet received from thePC 212 or 213 over theLAN 501 matches a packet pattern stored in the proxy-response-pattern storage region 407. Because the packet patterns shown inFIG. 9 are stored in the proxy-response-pattern storage region 407 of thenetwork portion 310, when the packet for the status request shown inFIG. 6 is received from the PC 212, thenetwork portion 310 determines YES (in step S513), and flow proceeds to step S514. When the packet for the status request shown inFIG. 7 is received from the PC 212, thenetwork portion 310 determines NO (in step S513), and flow proceeds to step S503. - In step S514, the
network portion 310 reads proxy response data (shown inFIG. 11 ) corresponding to the proxy response pattern detected in step S513 from the proxy-response-data storage region 408. Because the packet patterns shown inFIG. 9 relate to the amount of toner remaining and the amount of paper left in the first cassette, “low toner level” is read as the amount of toner remaining and “paper is present in first cassette” is read as the amount of paper left in the first cassette. - In step S515 (second executing step), the
network portion 310 performs reply processing for the proxy response pattern detected in step S513. In the example illustrated inFIG. 6 , the status request for the amount of toner remaining and the amount of paper left in the first cassette is made. Thus, a response packet illustrated inFIG. 12 is generated on the basis of information indicating the presence/absence of paper detected as the amount of toner remaining and the amount of paper left in thefeeding unit 122 stored in the proxy-response-data storage region 408. Thenetwork portion 310 transmits the response packet illustrated inFIG. 12 to the PC 212, and flow proceeds to step S503. In the reply processing of step S515, the deep sleep mode can be maintained. Accordingly, the reply processing can be promptly performed, while at the same time there is no power consumption caused by a power supplied to theCPU 301. - As described above, according to the first embodiment, a WOL pattern that is received more than a predetermined number of times can be stored as a proxy response pattern. Thus, the image forming apparatus enables the
network portion 310 to perform reply processing while maintaining the deep sleep mode without returning from the deep sleep mode to the normal mode. - A second embodiment of the present invention is described next.
- The second embodiment is a modified example of the first embodiment and is substantially the same as the first embodiment except the respect described below.
- In the first embodiment, steps S505 to S512 illustrated in
FIG. 5 are executed by theCPU 301. In contrast, in the second embodiment, steps S505 to S512 illustrated inFIG. 5 are executed by thenetwork portion 310, thus reducing the load of processing in theCPU 301. -
FIG. 13 is a block diagram that illustrates another example of a configuration of thenetwork portion 310 according to the second embodiment. -
FIG. 13 differs fromFIG. 4 in that a WOL-packet storage processor 601 and aRAM 602 are added to thenetwork portion 310. TheRAM 602 includes a packet-information storage region 603 as a storage region. - The processing performed by the
image forming apparatus 220 in the second embodiment is substantially the same as steps illustrated inFIG. 5 described in the first embodiment, but differs in the following respect. - In the first embodiment, one is added to the number of receptions (increment) in step S506, and information thereof is stored in the
HDD 304. In contrast, in the second embodiment, the WOL-packet storage processor 601 stores the information thereof in the packet-information storage region 603. - As described above, according to the second embodiment, in addition to the advantageous effects of the first embodiment, the load of processing in the main controller (CPU 301) of the image forming apparatus can be reduced.
- A third embodiment of the present invention is described next.
- The third embodiment is a modified example of the first embodiment and is substantially the same as the first embodiment except the respect described below.
- In the first embodiment, in step S507 illustrated in
FIG. 5 , for the determination of whether the number of receptions of a WOL pattern exceeds a predetermined value, “predetermined value” is not changed for any type of the WOL pattern (e.g., 20 receptions). In contrast, in the third embodiment, “predetermined value” used in the determination in step S507 varies depending on the type of the WOL pattern. - Specifically, information illustrated in
FIG. 14 is stored in theHDD 304 in advance. TheCPU 301 refers to the information illustrated inFIG. 14 in the determination in step S507 whether the number of receptions of the WOL pattern detected in step S503 exceeds a predetermined value. The information illustrated inFIG. 14 can be referred to by theCPU 301. - For example, when the WOL pattern detected in step S503 is “the status request/the amount of paper left in the second cassette” illustrated in
FIG. 8 , theCPU 301 refers to the information illustrated inFIG. 14 to perform the determination in step S507. If the number of receptions of the WOL pattern for “the status request/the amount of paper left in the second cassette” exceeds 20 (YES in step S507), theCPU 301 advances the processing to step S509; otherwise (NO in step S507) theCPU 301 advances the processing to step S511. - In another case, for example, when the WOL pattern detected in step S503 is “the status request/the amount of paper left in the third cassette” illustrated in
FIG. 8 , theCPU 301 refers to the information illustrated inFIG. 14 to perform the determination in step S507. If the number of receptions of the WOL pattern for “the status request/the amount of paper left in the third cassette” exceeds 30 (YES in step S507), theCPU 301 advances the processing to step S509; otherwise (NO in step S507) theCPU 301 advances the processing to step S511. - The information indicating the number of receptions illustrated in
FIG. 14 can be freely set by a user of theimage forming apparatus 220 through the operatingportion 140 illustrated inFIG. 1 . - As described above, according to the third embodiment, in addition to the advantageous effects of the first embodiment, the number of receptions used to store a new WOL pattern as a proxy response pattern can be changed depending on the type of the WOL pattern. Thus, the image forming apparatus can perform proxy response processing for a packet pattern in accordance with a network environment where the image forming apparatus is placed.
- A fourth embodiment of the present invention is described next.
- The fourth embodiment is a modified example of the first embodiment and is substantially the same as the first embodiment except the respect described below.
- In the fourth embodiment, a proxy response pattern stored in the proxy-response-
pattern storage region 407 of thenetwork portion 310 of theimage forming apparatus 220 is transmitted to another image forming apparatus. When an image forming apparatus is newly placed in theLAN 501, proper proxy reply processing suited for the network can be performed by storing a proxy response pattern stored in a previously placed image forming apparatus in theLAN 501 in the newly placed image forming apparatus. -
FIG. 15 is a flowchart illustrating a process performed by theimage forming apparatus 220. - The
CPU 301 of theimage forming apparatus 220 reads a program from theHDD 304 or theROM 303 to theRAM 302 and executes the processing of steps inFIG. 15 . - In step S1001, the
CPU 301 determines whether a user of theimage forming apparatus 220 has input a request to transmit a proxy response pattern to another image forming apparatus through the operatingportion 140. If it is determined that the request has been input (YES in step S1001), flow proceeds to step S1002. The user of theimage forming apparatus 220 can input the request by pressing abutton 1101 illustrated inFIG. 16 , for example. - In step S1002, the
CPU 301 transmits a search packet to theLAN 501 to search for another image forming apparatus (multifunction peripheral (MFP)) connected to theimage forming apparatus 220 over theLAN 501. When theimage forming apparatus 220 receives a response to the search packet, information on other image forming apparatuses (MFPs) connected to theimage forming apparatus 220 over theLAN 501 is displayed on the operatingportion 140, as illustrated in anarea 1102 inFIG. 16 . - In step S1003, the
CPU 301 selects one of the image forming apparatuses listed on the operatingportion 140, as illustrated in thearea 1102, in response to an instruction from the user. - In step S1004, the
CPU 301 transmits the proxy response pattern stored in the proxy-response-pattern storage region 407 to the selected image forming apparatus. - The processing for receiving a proxy response pattern in the image forming apparatus selected in step S1003 illustrated in
FIG. 15 is described next with reference to the flowchart illustrated inFIG. 17 . - In the description below, a case is discussed where the user of the
image forming apparatus 220 selects theimage forming apparatus 230 illustrated inFIG. 1 as a destination of transmission of the proxy response pattern. TheCPU 301 of theimage forming apparatus 230 reads a program from theHDD 304 or theROM 303 to theRAM 302 and executes the processing of steps inFIG. 17 . - In step S1201, the
CPU 301 of theimage forming apparatus 230 determines whether thenetwork portion 310 has received the proxy response pattern transmitted from theimage forming apparatus 220. If theCPU 301 determines the reception of the proxy response pattern (YES in step S1201), flow proceeds to step S1202. - In step S1202, the
CPU 301 stores the proxy response pattern received from theimage forming apparatus 220 in the proxy-response-pattern storage region 407 of thenetwork portion 310. - As described above, according to the fourth embodiment, in addition to the advantageous effects of the first embodiment, when an image forming apparatus is newly placed in a network, a proxy response pattern stored in an image forming apparatus previously placed in the network is stored in the newly placed image forming apparatus. Accordingly, the newly placed image forming apparatus can perform proper proxy response processing.
- In the above embodiments, a WOL pattern that is received more than a predetermined number of times is registered as a proxy response pattern. However, other forms can also be applied. For example, the mean value of time intervals of receptions of a WOL pattern may be calculated, and the WOL pattern may be registered as the proxy response pattern if the mean value is smaller than a predetermined period of time. Alternatively, the determination of whether a WOL pattern is to be registered as a proxy response pattern may be made on the basis of the number of receptions of the WOL pattern in the past certain period (e.g., past one day or past one week). Further, the determination of whether a WOL pattern is to be registered as a proxy response pattern may be made on the basis of another reception status, other than the number of receptions or the time intervals of receptions.
- In the above embodiments, a storage area of the EEPROM is divided into a plurality of storage regions. Various methods can be used in dividing into such storage regions. For example, an address space range may be divided, and resultant regions may be assigned a WOL-pattern storage region, a proxy-response-pattern storage region, and a proxy-response-data storage region. In this case, in re-registering a WOL pattern as a proxy response pattern, the WOL pattern is deleted from the WOL-pattern storage region, and the new WOL pattern is stored in the proxy-response-pattern storage region. Alternatively, a table referred to for determining whether each pattern has been registered as a WOL pattern or a proxy response pattern without a change in physical positions where the patterns are stored may be provided. In this case, in re-registering a packet pattern as a proxy response pattern from a WOL pattern, the table is altered such that a position to be referred to for the packet pattern is changed from the WOL pattern to the proxy response pattern. That is, it is not necessarily required that the storage regions in the above embodiments be physically divided regions; they may be logical regions in which a WOL pattern and a proxy response pattern are congregated.
- In the above embodiments, the WOL-
pattern storage region 406 and the proxy-response-pattern storage region 407 are EEPROMs being non-volatile storage units. However, they may also be volatile storage units. However, in the case where a volatile storage unit is used, when the main switch of theimage forming apparatus 220 is turned off, packet patterns stored in the volatile storage unit is lost. To address this, in the case where the volatile storage unit is used, it is necessary to move the packet pattern from the volatile storage unit to theHDD 304 when it is determined that the main switch of theimage forming apparatus 220 will be turned off. Additionally, it is also necessary to move the packet pattern stored in theHDD 304 to the volatile storage unit when the main switch of theimage forming apparatus 220 is turned on. - The functions of the present invention can also be achieved by supplying a storage medium in which program code of software performing the functions of at least one of the above embodiments is recorded to a system or an apparatus. In this case, the functions of at least one of the above embodiments are achieved by the system or the apparatus reading and executing the program code stored in the storage medium. In this case, the program code itself read from the storage medium achieves the functions of at least one of the above embodiments, and the storage medium storing the program code is included in the present invention.
- While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all modifications and equivalent structures and functions.
Claims (10)
1. (canceled)
2. A data processing apparatus having a controller and a network portion, the data processing apparatus being operable in a first power mode for supplying power to both of the controller and the network portion or in a second power mode for supplying power to the network portion while supplying, to the controller, power less than the power supplied in the first power mode, the network portion comprising:
a storage unit configured to store a first packet pattern and a second packet pattern;
a determining unit configured to determine whether a received packet matches the first packet pattern stored in the storage unit or the second packet pattern stored in the storage unit, in a case where the data processing apparatus operates in the second power mode;
a reply processing unit configured to perform reply processing on the received packet without shifting the data processing apparatus from the second power mode to the first power mode, in a case where the determining unit determines that the received packet matches the first packet pattern; and
a shift processing unit configured to perform shift processing which is for shifting the data processing apparatus from the second power mode to the first power mode, in a case where the determining unit determines that the received packet matches the second packet pattern,
wherein in a case where a number of receptions of a specific packet that has been stored in the storage unit as the second packet pattern satisfies a predetermined condition, the storage unit stores the specific packet not as the second packet pattern but as the first packet pattern.
3. The data processing apparatus according to claim 1 , wherein the storage unit stores the specific packet not as the second packet pattern but as the first packet pattern, in a case where a number of receptions of the specific packet in a certain period satisfies the predetermined condition.
4. The data processing apparatus according to claim 1 , wherein the storage unit stores the specific packet not as the second packet pattern but as the first packet pattern, in a case where a number of receptions of the specific packet exceeds a predetermined number of times.
5. The data processing apparatus according to claim 3 , wherein the predetermined number of times differs depending on a type of the specific packet.
6. The data processing apparatus according to claim 3 , wherein the predetermined number of times can be changed based on a user's input.
7. The data processing apparatus according to claim 1 , wherein in a case where there is no available space for storing the specific packet as the first packet pattern, the storage unit deletes a packet which is least frequently received among packets having been stored in the storage unit as the first packet pattern, and stores the specific packet as the first packet pattern.
8. The data processing apparatus according to claim 1 , wherein in a case where the data processing apparatus operates in the second power mode, power supply to the controller is interrupted.
9. A method for controlling a data processing apparatus having a controller and a network portion, the data processing apparatus being operable in a first power mode for supplying power to both of the controller and the network portion or in a second power mode for supplying power to the network portion while supplying, to the controller, power less than the power supplied in the first power mode, comprising:
storing a first packet pattern and a second packet pattern;
determining whether a received packet matches the first packet pattern stored or the second packet pattern stored, in a case where the data processing apparatus operates in the second power mode;
performing reply processing on the received packet without shifting the data processing apparatus from the second power mode to the first power mode, in a case where it is determined that the received packet matches the first packet pattern; and
performing shift processing which is for shifting the data processing apparatus from the second power mode to the first power mode, in a case where it is determined that the received packet matches the second packet pattern,
wherein in a case where a number of receptions of a specific packet that has been stored as the second packet pattern satisfies a predetermined condition, the specific packet is stored not as the second packet pattern but as the first packet pattern.
10. A computer-readable storage medium for storing a computer-executable process, the computer-executable process causing a computer to execute a method for controlling a data processing apparatus having a controller and a network portion, the data processing apparatus being operable in a first power mode for supplying power to both of the controller and the network portion or in a second power mode for supplying power to the network portion while supplying, to the controller, power less than the power supplied in the first power mode, comprising:
storing a first packet pattern and a second packet pattern;
determining whether a received packet matches the first packet pattern stored or the second packet pattern stored, in a case where the data processing apparatus operates in the second power mode;
performing reply processing on the received packet without shifting the data processing apparatus from the second power mode to the first power mode, in a case where it is determined that the received packet matches the first packet pattern; and
performing shift processing which is for shifting the data processing apparatus from the second power mode to the first power mode, in a case where it is determined that the received packet matches the second packet pattern,
wherein in a case where a number of receptions of a specific packet that has been stored as the second packet pattern satisfies a predetermined condition, the specific packet is stored not as the second packet pattern but as the first packet pattern.
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- 2012-08-06 US US13/567,906 patent/US20120303988A1/en not_active Abandoned
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US20140072323A1 (en) * | 2012-09-11 | 2014-03-13 | Canon Kabushiki Kaisha | Image forming apparatus, and method of controlling image forming apparatus |
US9146522B2 (en) * | 2012-09-11 | 2015-09-29 | Canon Kabushiki Kaisha | Image forming apparatus, and method of controlling image forming apparatus |
US20140298054A1 (en) * | 2013-03-29 | 2014-10-02 | Canon Kabushiki Kaisha | Information processing apparatus capable of connecting to network in power saving state, method of controlling the same, and storage medium |
US9625975B2 (en) * | 2013-03-29 | 2017-04-18 | Canon Kabushiki Kaisha | Information processing apparatus capable of connecting to network in power saving state, method of controlling the same, and storage medium |
Also Published As
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US8261113B2 (en) | 2012-09-04 |
JP2009151537A (en) | 2009-07-09 |
US20090164816A1 (en) | 2009-06-25 |
JP5064995B2 (en) | 2012-10-31 |
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