WO2012011253A1 - Dispositif, procédé et programme de transfert de données inter-dispositif - Google Patents

Dispositif, procédé et programme de transfert de données inter-dispositif Download PDF

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Publication number
WO2012011253A1
WO2012011253A1 PCT/JP2011/004002 JP2011004002W WO2012011253A1 WO 2012011253 A1 WO2012011253 A1 WO 2012011253A1 JP 2011004002 W JP2011004002 W JP 2011004002W WO 2012011253 A1 WO2012011253 A1 WO 2012011253A1
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Prior art keywords
data
size
data transfer
communication unit
external storage
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PCT/JP2011/004002
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English (en)
Japanese (ja)
Inventor
高橋　雅彦
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日本電気株式会社
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Priority to JP2012525311A priority Critical patent/JPWO2012011253A1/ja
Publication of WO2012011253A1 publication Critical patent/WO2012011253A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/382—Information transfer, e.g. on bus using universal interface adapter
    • G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/38—Universal adapter
    • G06F2213/3808—Network interface controller

Definitions

  • the present invention relates to an inter-device data transfer apparatus, a computer system, an inter-device data transfer method, and an inter-device data transfer program that transfer data between devices.
  • an operating system exchanges necessary data by software control between various connected devices and a main storage device (main memory).
  • main storage device main memory
  • a fixed size and an upper limit of the data transfer are determined for each device.
  • this size is referred to as a device I / O size.
  • Ethernet registered trademark
  • MTU maximum transfer unit
  • the OS manages the storage area of the main storage device in a predetermined size, and performs control to perform data transfer with the external storage device at this size. This size is determined to be 4096 bytes, for example. As in the case of the network device, when exchanging data of a size larger than this, it is necessary to divide the data into sizes of 4096 bytes.
  • an electronic mail server transmits and receives electronic mail.
  • the web server acquires content (images, documents / HTML files, etc.) on the server from an external storage device or the like in response to a request from the client, and transmits it to the client.
  • Patent Document 1 discloses an optimization method for transmitting data from one device to another device without processing the data.
  • Patent Document 2 smooth data transfer is performed between the communication means and the storage device even while the CPU needs to frequently access data on the main storage device. An information processing apparatus that can be performed is described.
  • a memory copy process occurs along with a process of adding a header area to the head of data, data division, and data integration. This is because, depending on the device, a header may be used, so that necessary information is different and the data size at the time of data transfer is different for each device.
  • the present invention provides a computer system, an inter-device data transfer apparatus, a computer system, an inter-device data transfer method, and inter-device data that can reduce data processing on the device when data is directly transferred between devices.
  • the purpose is to provide a transfer program.
  • An inter-device data transfer apparatus is an inter-device data transfer apparatus that includes a communication unit and an external storage unit and is connected to an external network, and transmits packet data related to a session designated in advance by an OS to the external network.
  • the packet data is not divided or integrated, or the area is not deleted, and the integral multiple of the I / O size of the communication unit is used as the data transfer size without using the main storage device.
  • a program execution unit for directly transferring data to a free area of the external storage unit and writing a file to the external storage unit.
  • An inter-device data transfer apparatus is an inter-device data transfer apparatus that includes a communication unit and an external storage unit and is connected to an external network, and stores a file block related to a session designated in advance by an OS. Communicating without going through the main storage device with the data transfer size being an integer multiple of the I / O size of the communication unit without dividing the data, integrating multiple data, or adding an area And a program execution unit for directly transferring data to the unit and transmitting the data to an external network.
  • a computer system is a computer system that includes a communication unit and an external storage unit and is connected to an external network, and receives packet data related to a session designated in advance by an OS via the external network.
  • the integer multiple of the I / O size of the communication unit is used as the data transfer size, and the free space in the external storage unit is not passed through the main storage device.
  • a program execution unit is provided that directly transfers data to an area and writes a file to an external storage unit.
  • the packet data when packet data related to a session designated in advance by the OS is received by the communication unit via the external network, the packet data is not divided or integrated, or the area is not deleted.
  • the data transfer size is an integral multiple of the I / O size of the communication unit, and the data is directly transferred to an empty area of the external storage unit and the file is written to the external storage unit without going through the main storage device.
  • the inter-device data transfer program receives a packet data related to a session designated in advance by the OS via the external network to a computer that includes a communication unit and an external storage unit and is connected to the external network.
  • the integer multiple of the I / O size of the communication unit is used as the data transfer size, and the free space in the external storage unit is not passed through the main storage device.
  • the present invention is characterized in that a process of directly transferring data to an area and writing a file to an external storage unit is executed.
  • FIG. 10 is a flowchart illustrating a processing example when a file is received from a client via the network 500 and written to the external storage unit 300.
  • 10 is a flowchart illustrating a processing example when the server program 110 reads a file from the external storage unit 300 and transmits the file to the client via the communication unit 400 and the network 500. It is a block diagram which shows the minimum structural example of the data transfer apparatus between devices.
  • FIG. 1 is a block diagram showing an example of the configuration of an inter-device data transfer apparatus according to the present invention.
  • the inter-device data transfer apparatus of this embodiment includes at least a program execution unit 100, a data transfer unit 200, an external storage unit 300, and a communication unit 400.
  • the inter-device data transfer apparatus is realized by an information processing apparatus such as a personal computer that operates under program control.
  • the present invention is applied to a computer system.
  • the computer system is realized by one or a plurality of information processing apparatuses.
  • the program execution unit 100 is an entity that executes an operating system (OS) 120 and a server program 110.
  • the program execution unit 100 is realized by a CPU that operates according to a program and a main storage device such as a memory.
  • the program execution unit 100 executes processing according to the server program 110, but the program is not limited to this.
  • the inter-device data transfer apparatus shown in this embodiment may be applied to a client apparatus.
  • the expression that the server program 110 and the OS 120 execute processing is used. Specifically, this is realized by the program execution unit 100 executing processing according to the program.
  • the server program 110 is a program for communicating with a client (not shown) via the network 500 and transmitting / receiving a file in response to a request from the client.
  • the client is specifically realized by an information processing apparatus such as a personal computer.
  • the OS 120 includes at least a device driver 121 and file management means 122.
  • the OS 120 is a privileged program for scheduling a plurality of programs and controlling devices.
  • the server program 110 when the server program 110 reads / writes a file or transmits / receives data via the network 500, the server program 110 outputs these requests to the OS 120. Then, the OS 120 controls the device using the device driver 121 in order to appropriately process the request.
  • the expression that the external storage unit 300 or the communication unit 400 executes processing is used. Specifically, the CPU operates in accordance with the device driver 121, and the external storage unit 300 and the communication unit 400 follow the instructions of the CPU. Operate.
  • the external storage unit 300 and the communication unit 400 may be equipped with a data transfer processor, and these processors may execute processing.
  • the file management unit 122 manages at least information such as the file name stored in the external storage unit 300 (described later), the location on the storage unit 301 (described later) storing the file, and the free space in the external storage unit 300. It has a function to do.
  • the file management unit 122 is used to search for a free area when writing a new file to the external storage unit 300, or to search for a location where the file is stored when reading an existing file.
  • the use of the file management means 122 is not limited to these.
  • the data transfer unit 200 is connected to various devices and has a function of transferring data between devices and transferring data between the device and a main storage device (not shown). Specifically, the data transfer unit 200 is realized by a bus using PCI, PCI Express, or the like.
  • the external storage unit 300 includes at least a storage unit 301, a data transmission / reception unit 302, and a data rewriting unit 303.
  • the external storage unit 300 has a function of reading and writing files.
  • the external storage unit 300 stores an execution program executed by the program execution unit 100 and a file to be transmitted in response to a request from the client. Further, the external storage unit 300 can store a file received from the client. Specifically, the external storage unit 300 is realized by an HDD (hard disk drive) or the like.
  • the storage unit 301 is a medium that actually stores files.
  • the storage unit 301 is divided and managed in a predetermined size called a sector.
  • the storage unit 301 stores all files to be read and written using one or more of these sectors. As the size of one sector, 512 bytes are widely used.
  • the data transmission / reception unit 302 is connected to the data transfer unit 200 and has a function of performing data transfer with the main storage device and other devices. Further, the data transmission / reception unit 302 has a function of receiving a request from the OS 120 and transmitting an interrupt request to the OS 120.
  • the data rewriting unit 303 has a function of rewriting header information of data transmitted by another device and adding / deleting a padding area to be described later.
  • the external storage unit 300 is used for the purpose of reading and writing files.
  • the method of using the external storage unit 300 is not limited thereto.
  • the external storage unit 300 may store various programs executed by the program execution unit 100.
  • the communication unit 400 includes at least a data transmission / reception unit 401, a data rewriting unit 402, and a data management unit 403.
  • the communication unit 400 has a function of communicating with external devices and client programs via the network 500. Note that the expression “communication with the client program” is used. Specifically, this is realized by the CPU of the client executing processing according to the program.
  • the data management unit 403 is realized by a storage medium included in the communication unit 400.
  • the data management unit 403 manages information included in a request transmitted by the OS 120.
  • the data rewriting unit 402 has a function of rewriting data with reference to information managed by the data management unit 403.
  • FIG. 2 is an explanatory diagram showing an example of the structure of the data management unit 403.
  • the data management unit 403 can also hold a plurality of entries with the structure shown in FIG. According to FIG. 2, the data management unit 403 includes, as data to be managed, a transmission source address, a free area position, a pointer to an area holding packet data or packet data, and an end flag.
  • the data management unit 403 is not limited to the example shown in FIG.
  • the server program 110 communicates with an external client and receives a file transmitted by the client, an address of the client (ID for identifying a session such as an IP address) is written. This information is output from the OS 120 and used to directly transfer file data from the communication unit 400 to the external storage unit 300.
  • ID for identifying a session such as an IP address
  • the empty area position describes the position of the empty area on the external storage unit 300 for writing the file transmitted by the client. This information is output from the OS 120.
  • the packet data is the data itself when the file transmitted by the client is received in a packet format that is a communication format on the network 500.
  • the packet is held on the communication unit 400 until the data is transferred to the external storage unit 300 and writing is completed.
  • the external storage unit 300 transmits a notification of completion, so that the communication unit 400 updates the end flag of the data management unit 403 by receiving the notification.
  • the OS 120 determines whether or not an end flag is set. If the end flag is set, the OS 120 releases the packet data and deletes the entry.
  • data is transmitted and received by being divided into data lengths called packets.
  • the maximum length of the packet is called MTU.
  • a transmission / reception address (such as an IP address) is written at the head of the packet. This area is called a packet header.
  • the size of one block at the time of data transfer is set to an integer multiple of the I / O size (that is, MTU) of the communication unit 400.
  • a padding area is provided from a value that is an integral multiple of the I / O size of the communication unit 400 to a value that is an integral multiple of the I / O size of the external storage unit 300.
  • the padding area is a data area for making up for a shortage of data amount.
  • 3 and 4 are explanatory diagrams showing an example of the padding area.
  • the I / O size of the external storage unit 300 is 512 bytes
  • the I / O size of the external storage unit 300 is 4,096 bytes
  • the area actually including data is an area obtained by subtracting a management information area such as a header from the I / O size of the communication unit 400.
  • this size is referred to as a data size.
  • the header size is 40 bytes
  • 1460 bytes is the data size.
  • the last 36 bytes are a padding area, which is a dummy area that does not contain useful information.
  • the file is divided into this data size, managed, and read / written.
  • FIG. 5 is a flowchart illustrating an example of processing when a file is received from a client via the network 500 and written to the external storage unit 300.
  • TCP / IP a protocol called TCP / IP
  • TCP / IP a protocol called TCP / IP
  • a client transmits a request for establishing a communication session to an inter-device data transfer apparatus (hereinafter also simply referred to as a server)
  • the server establishes a communication session with the client in response to the received request (step S101).
  • the client transmits the target file to the server together with the upload request. Then, the server receives the request, and the server program 110 analyzes the received request (step S102).
  • the server program 110 outputs a file transfer processing request to the OS 120 together with the file name and client session information (source address) (step S103).
  • the OS 120 searches for information managed by the file management unit 122 and acquires position information of a free area on the external storage unit 300 corresponding to the block size. Then, the OS 120 registers the acquired space area position information and client session information (hereinafter also referred to as transfer information) in the data management unit 403 of the communication unit 400 (step S104).
  • transfer information client session information
  • the communication unit 400 receives a packet related to this session via the network 500 (step S105).
  • the communication unit 400 specifies a transmission source address from the received packet, searches the data management unit 403 based on the specified transmission source address, and acquires position information of a free area on the external storage unit 300 ( Step S106).
  • the communication unit 400 transmits the acquired data write request to the position of the free area on the external storage unit 300 to the external storage unit 300 via the data transfer unit 200 (step S107).
  • the packet header area is not deleted from the packet. By doing so, it is not necessary to perform memory copy or data division / integration when storing or acquiring a stored packet, and the processing load on the device can be reduced. In addition, since the data transfer does not pass through the main storage device, the utilization efficiency of the data transfer unit 200 can be increased.
  • the external storage unit 300 that has received the data (packet) together with the request from the communication unit 400 writes the data in the designated free space. For example, when the block size is 1536 bytes, the external storage unit 300 writes to the storage unit 301 for 3 sectors. At this time, after the data transfer size, the external storage unit 300 writes dummy data as a padding area in the storage unit 301. When the data writing is completed, the external storage unit 300 transmits a write end message to the communication unit 400 via the data transfer unit 200.
  • the communication unit 400 that has received the write end message updates the stored contents of the data management unit 403 so that the end flag of the entry managed by the data management unit 403 is set. Thereafter, the communication unit 400 transmits an interrupt request to the OS 120 (step S108).
  • the OS 120 that has received the interrupt request deletes the transfer information registered in the data management unit 403 (step S109). Specifically, the OS 120 refers to the data management unit 403 of the communication unit 400 and determines whether or not the end flag of the corresponding entry is set. When the end flag is set, the OS 120 updates information indicating the file offset position of the session.
  • the OS 120 searches for a new free area in the external storage unit 300. Then, the OS 120 writes the position information of the searched free area to the data management unit 403, deletes the end flag, and releases the packet data.
  • the server program 110 determines whether or not the session has ended (step S110), and when determining that the session has ended, ends the processing based on the request received from the client. If it is determined that the processing has not ended, the server program 110 shifts the processing to step S104, and executes the processing subsequent to step S104 for the packet that is continuously received.
  • a certain free area may always be secured in the external storage unit 300, and the OS 120 may allocate this free area to the communication unit 400.
  • the size of the area is arbitrary, but for example, a sufficient size is allocated so that the area is not depleted even when the communication load is high (throughput is large). This area can be added as necessary.
  • the server sequentially transfers and writes the packets received via the network 500 to this empty area.
  • the data management unit 403 records a transmission source address, a file offset value, and information on the position of the written free area.
  • the OS 120 polls in response to an interrupt request transmitted by the communication unit 400 when the free space becomes small or at predetermined time intervals, and refers to the information in the data management unit 403 to obtain file management information. This is reflected in the file management means 122 in the OS 120. Thereafter, the OS 120 allocates a new free area to the communication unit 400. By doing so, the bus utilization efficiency can be improved, the transfer delay time can be shortened, and the load on the program execution unit 110 can be reduced as in the above example.
  • data can be directly transferred between devices. This is because the data on the device is transferred without being temporarily written in the main memory. Further, when data is directly transferred between devices, a data processing load such as memory copy on the devices can be reduced. This is because the data size considering the addition of information to the head area of data and the difference in I / O size for each device is adopted.
  • the inter-device data transfer apparatus performs data transfer by setting the size of one block at the time of data transfer as an integer multiple of the I / O size of the communication unit 400. Further, a padding area is provided from a value that is an integral multiple of the I / O size of the communication unit 400 to a value that is an integral multiple of the I / O size of the external storage unit 300 as necessary.
  • Embodiment 2 FIG. In the first embodiment, the data transfer process from the communication unit 400 to the external storage unit 300 has been described. In the present embodiment, a flow of data transfer processing from the external storage unit 300 to the communication unit 400 will be described.
  • the configuration of the second embodiment is the same as the configuration of the first embodiment.
  • FIG. 6 is a flowchart illustrating an example of processing when the server program 110 reads a file from the external storage unit 300 and transmits the file to the client via the communication unit 400 and the network 500.
  • the server when the client transmits a request for establishing a communication session to the server, the server establishes a communication session with the client in response to the received request (step S201).
  • the client transmits information for specifying the target file to the server together with a request for downloading the file.
  • the server program 110 analyzes the received request (step S202).
  • the server program 110 outputs a file transmission processing request to the OS 120 together with the file name and client session information (step S203).
  • the OS 120 searches the information managed by the file management unit 122 and specifies the head sector number of the target file on the external storage unit 300. Then, the OS 120 associates the specified position information (first sector number) with the client information (hereinafter also referred to as transfer information) and registers it in the communication unit 400 (step S204). Furthermore, the OS 120 reads an instruction to read the file data block at the specified position and transfer it to the communication unit 400 to the external storage unit 300.
  • the external storage unit 300 When receiving the instruction from the OS 120, the external storage unit 300 reads the file data block from the position based on the instruction, and transfers the data to the communication unit 400 via the data transfer bus 200 (step S206). At this time, the past header information and the padding area remain in the read file data block, and the external storage unit 300 transfers the data as it is without deleting the padding area but the header area. However, the external storage unit 300 writes the position information (such as the sector number on the storage) where the file data block is stored in the header area and transfers the data.
  • the position information such as the sector number on the storage
  • the communication unit 400 that has received the data rewrites the header area based on the client information associated with the location information registered by the OS 120 in step S204. Note that instead of step S206, the communication unit 400 may delete the padding area at this time. Thereafter, the communication unit 400 transmits data to the client via the network 500 (step S207). At this time, the communication unit 400 may calculate and write header information such as a checksum according to the network protocol to be used.
  • the external storage unit 300 may execute the header area writing process.
  • the OS 120 also transmits session information (client information) to the external storage unit 300, and the external storage unit 300 rewrites the header area based on the received session information, and passes the data transfer bus 200.
  • client information session information
  • the communication unit 400 which received file block data from the external memory
  • the communication unit 400 transmits an interrupt request to the OS 120 (step S208).
  • the OS 120 that has received the interrupt request deletes the transfer information of the session written on the data management unit 403 of the communication unit 400 (step S209).
  • the OS 120 determines whether or not the file data block handled in step S207 is the end of the file, that is, whether or not there is a remaining file data block constituting the target file (step S210).
  • step S210 If it is determined in step S210 that there is a remaining file data block, the OS 120 searches for the sector number on the external storage unit 300 of the next block of the file, and transmits the position information and the client information to the communication unit. 400 is registered. Thereafter, the OS 120 shifts the process to step S204, and executes the processes after step S204.
  • step S210 if it is determined in step S210 that there are no remaining file data blocks, the OS 120 returns control to the server program 110 or sends a signal to notify the completion of the file transfer. Thereafter, the server program 110 ends the session with the client (step S211).
  • the communication unit 400 can automatically increment the sector number and read the next file data block. It is. That is, the communication unit 400 can specify the consecutive sector numbers and transmit an instruction to read the next file data block to the external storage unit 300, so that the processes in and after step S206 can be executed. Therefore, the communication unit 400 transmits an interrupt request to the OS 120 only when the file transmission is completed.
  • the external storage unit 300 instead of sending an interrupt request to the OS 120 every time packet data transmission is completed, the external storage unit 300 It is also possible to increase the sector number automatically and read the next block. Also in this case, the communication unit 400 transmits an interrupt request to the OS 120 only when the file transmission is completed.
  • the inter-device data transfer apparatus when data is directly transferred between devices, data processing load such as memory copy on the devices can be reduced. This is because the data size considering the addition of information to the head area of data and the difference in I / O size for each device is adopted.
  • the inter-device data transfer apparatus performs data transfer by setting the size of one block at the time of data transfer as an integer multiple of the I / O size of the communication unit 400. Further, a padding area is provided from a value that is an integral multiple of the I / O size of the communication unit 400 to a value that is an integral multiple of the I / O size of the external storage unit 300 as necessary. Further, the inter-device data transfer apparatus stores the received data header area without deleting it, and when transmitting the stored data to the outside, rewrites the header area of the data based on the information indicating the transmission destination. Yes.
  • the present invention relates to an inter-device data transfer apparatus, an inter-device data transfer method, and an inter-device data transfer program, and more particularly to an inter-device data transfer apparatus capable of efficiently transferring data even when the device processing capability is low,
  • the present invention relates to an inter-device data transfer method and an inter-device data transfer program.
  • FIG. 7 is a block diagram illustrating a minimum configuration example of the inter-device data transfer apparatus.
  • the inter-device data transfer apparatus includes a program execution unit 100, an external storage unit 300, and a communication unit 400 as minimum components.
  • the program execution unit 100 does not divide or integrate the packet data or delete the area, and uses an integral multiple of the I / O size of the communication unit 400 as a data transfer size without going through the main storage device. Then, data is directly transferred to an empty area of the external storage unit 300 and a file is written to the external storage unit 300.
  • the data transfer apparatus between devices with the minimum configuration adopts a data size that takes into account the difference in I / O size for each device, adding a header area to the beginning of data, dividing data, and integrating data There is no need to perform a memory copy process associated with the process to be performed. Therefore, when data is directly transferred between devices, data processing on the devices can be reduced.
  • An inter-device data transfer apparatus includes a communication unit (for example, the communication unit 400) and an external storage unit (for example, the external storage unit 300), and is connected between devices connected to an external network (for example, the network 500).
  • a data transfer device that divides or integrates packet data or deletes an area when packet data related to a session designated in advance by an OS (for example, OS 120) is received by a communication unit via an external network.
  • the program execution unit directly transferring data to an empty area of the external storage unit and writing the file to the external storage unit without using the main storage device as the data transfer size is used as an integer multiple of the I / O size of the communication unit.
  • the program execution unit 100 may be provided.
  • the program execution unit when the program execution unit reads from the external storage unit a file block related to a session designated in advance by the OS, it divides data, integrates a plurality, or adds an area.
  • the data transfer size may be an integral multiple of the I / O size of the communication unit, and the data may be directly transferred to the communication unit and transmitted to an external network without going through the main storage device. .
  • the data transfer size is an integer multiple of the I / O size of the communication unit.
  • the file may be divided by a size obtained by subtracting an information area (for example, a header area) necessary for the device, and read / write may be performed by an external storage unit.
  • the program execution unit adds an padding area to the data based on the I / O size between the communication unit and the external storage unit, thereby obtaining an integer of the I / O size of the communication unit.
  • Data transfer may be performed with the data transfer size being doubled.
  • the inter-device data transfer apparatus includes a communication unit (for example, the communication unit 400) and an external storage unit (for example, the external storage unit 300), and is connected between devices connected to an external network (for example, the network 500).
  • a data transfer device that reads a file block related to a session designated in advance by the OS from the external storage unit without dividing the data, integrating a plurality of data, or adding an area.
  • a program execution unit (for example, the program execution unit 100) that directly transfers data to the communication unit and transmits it to an external network without using the main storage device as an integer multiple of the / O size is provided.
  • a device-to-device data transfer apparatus is provided.
  • the present invention can be applied to an application for reducing a load caused by data transfer between devices in an information processing apparatus or the like.
  • program execution unit 110 server program 120 operating system (OS) 121 device driver 122 file management means 200 data transfer unit 300 external storage device 301 storage unit 302 data transmission / reception unit 303 data rewrite unit 400 communication unit 401 data transmission / reception unit 402 data rewrite unit 403 data management unit 500 network

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Abstract

L'invention concerne un dispositif de transfert de données inter-dispositif servant à transférer des données entre des dispositifs connectés à un réseau externe, comportant une unité de communication et une mémoire externe, le dispositif de transfert de données comprenant une unité d'exécution de programme qui, lorsqu'elle reçoit au niveau de l'unité de communication via le réseau externe les données en paquet concernant une session qui est désignée au préalable par un OS, transfère directement les données à une zone vide de la mémoire externe et écrit un fichier dans l'unité de mémoire externe sans diviser ou fusionner les données en paquet ni supprimer la zone, la taille de transfert des données étant un multiple intégral de la taille d'E/S de l'appareil de communication, sans utiliser de dispositif mémoire principal.
PCT/JP2011/004002 2010-07-23 2011-07-13 Dispositif, procédé et programme de transfert de données inter-dispositif WO2012011253A1 (fr)

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JPH11355354A (ja) * 1998-06-03 1999-12-24 Sony Corp メモリ制御装置およびそれを使用したデータ受信装置
JP2000056940A (ja) * 1998-08-14 2000-02-25 Ricoh Co Ltd ネットワークプリンタ
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JP2006092633A (ja) * 2004-09-22 2006-04-06 Fuji Xerox Co Ltd 通信データ記録装置及び通信データ記録方法

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