JP2007114853A - First data transmitter/receiver and receiver and second data transmitter/receiver and data transmission/reception system and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the throughput of a whole system compared with what can transmit only one data by continuously transmitting two divided data to a printer. <P>SOLUTION: When a dongle receives division data of a size of 1,514 bytes, the first divided data are stored in a buffer area of a size of 1,536 bytes (steps S110, S120), and the second divided data are stored in the buffer area of a size of 1,514 bytes (steps S130, S140), and the data of the buffer area of the size of 1,536 bytes are used as three data of the size of 512 bytes, and the data of the buffer area of the size of 1,514 bytes are successively transmitted to the printer as two data of the size of 512 bytes and one data of the size of 490 bytes (step S150). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a first data reception / transmission device, a reception device, a second data reception / transmission device, a data reception / transmission system, and a data reception / transmission method.

Conventionally, this type of data reception / transmission system functions as a USB (Universal Serial Bus) host, prints received data, and functions as a USB device connected to a USB port of the printer, as well as a wireless LAN, etc. A dongle that can be connected to the network, receives an Ethernet (registered trademark) frame transmitted from the client terminal via the network with the dongle, and receives the Ethernet (registered trademark) frame received by the dongle with a maximum packet size (USB full). A device that uses a CDC (Cmmunication Device Class) protocol that is divided into data up to 64 bytes in the case of devices that support speed and 512 bytes in the case of devices that support USB high speed) has been proposed. (For example, non-special See Permissible Literature 1). In this system, when the data transmitted from the dongle to the printer is data of a size less than the maximum packet size called a short packet, it is determined that one data transmission is completed, and the process of concatenating the data received so far is performed. Execute.
Universal Serial Bus Class Definitions for Communication Devices, p. 23-24, 3.8.1.1 Segment Delineation (3.8.1.1 Segment Delineation), [online], [Search September 9, 2005], Internet <URL: http: //www.usb. org / developers / devclass_docs / usbcdc11.pdf>

  However, in the above-described system, when data is transmitted from the dongle to the printer, the number of data that can be continuously transmitted in one data transmission may be limited. For example, when considering the case where print data is divided into 1514-byte Ethernet (registered trademark) frames from a client terminal and transmitted to a dongle, the dongle compatible with USB high speed receives the received 1514-byte data in two 512 bytes. Data and one 490-byte data are transmitted to the printer, so a short packet always occurs, and more than 3 data cannot be transmitted continuously from the dongle to the printer in one data transmission. . As described above, when the number of data that can be transmitted from the dongle to the printer is limited, the transmission efficiency is deteriorated and the overall throughput is lowered.

  An object of the first data receiving / transmitting device, receiving device, second data receiving / transmitting device, data receiving / transmitting system, and data receiving / transmitting method of the present invention is to improve throughput in receiving and transmitting data.

  The first data reception / transmission apparatus, the reception apparatus, the second data reception / transmission apparatus, the data reception / transmission system, and the data reception / transmission method of the present invention employ the following means in order to achieve the above-described object.

The first data receiving / transmitting device of the present invention comprises:
A first data receiving / transmitting device for receiving and transmitting data,
First data storage means capable of storing data;
The original data is received as a plurality of divided data obtained by dividing each of the first size by a first predetermined size larger than the size obtained by multiplying the first size by an integer (n) and stored in the first data storage means. First reception processing means;
First transmission processing means for sequentially transmitting the plurality of stored divided data as integer (n + 1) first size data;
It is a summary to provide.

  In the first data receiving / transmitting apparatus of the present invention, the original data is received as a plurality of divided data obtained by dividing the original data into second sizes that are larger by a first predetermined size than the size obtained by multiplying the first size by an integer (n). Then, the plurality of divided data stored in the first data storage means are sequentially transmitted as integer (n + 1) first size data. As a result, a plurality of pieces of divided data can be sequentially transmitted as integer (n + 1) pieces of first size data, so that throughput can be improved as compared with an apparatus that can send only one piece of divided data.

  In the first data receiving / transmitting apparatus of the present invention, the first transmission processing means may perform the remaining integer (n + 1) th data obtained by dividing the divided data into integer (n) first size data. It may be a means for transmitting as data of a first size obtained by adding adjustment data having a size obtained by subtracting the first predetermined size from the first size. In this way, even when the size of the divided data cannot be divided into an integer number of first size data, the data can be transmitted as the first size data.

  In the first data reception / transmission apparatus of the present invention, the first reception processing means may obtain the first size by multiplying by an integer (n + 1) when storing the divided data in the first data storage means. Means for securing and storing a storage area of the storage size, wherein the first transmission processing means sequentially sets the divided data stored in the storage area of the storage size to an integer (n + 1) first size It can also be a means for transmitting as the data. In this way, the divided data can be transmitted as integer (n + 1) first size data.

  Furthermore, in the first data receiving / transmitting device of the present invention, the first transmission processing means transmits an integer (n + 1) th piece of integer (m) divided data every time an integer (m) piece of divided data is transmitted. This data may be a means for transmitting the data as the first predetermined size data. In this way, every time integer (m) divided data is transmitted, the integer (n + 1) th data of the integer (m) th divided data can be transmitted as data of the first predetermined size.

The first receiving apparatus of the present invention is the first data receiving / transmitting apparatus of the present invention according to any one of the aspects described above, that is, basically the first data receiving / transmitting apparatus that receives and transmits data. A first data storage means capable of storing data, and a plurality of divided data obtained by dividing the original data into second sizes larger by a first predetermined size than a size obtained by multiplying the first size by an integer (n) First reception processing means for receiving the received data and storing it in the first data storage means, and first transmission processing means for sequentially transmitting the plurality of stored divided data as integer (n + 1) first size data, A receiving device for receiving data transmitted from a first data receiving / transmitting device comprising:
Of the integer (n + 1) first size data received from the first data receiving / transmitting device, the data up to the integer (n) number is processed as the data to be concatenated with the received first size. For the integer (n + 1) th data, the data up to the first predetermined size among the received first size data is processed as concatenated data, and the remaining data is processed as data to be discarded Reception processing means,
It is a summary to provide.

  In the first receiving apparatus of the present invention, up to an integer (n) number of the integer (n + 1) pieces of first size data received from the first data receiving / transmitting apparatus of the present invention in any of the above-described aspects. Is processed as data to be concatenated with the received first size, and for the integer (n + 1) th data, data up to the first predetermined size of the received first size data is concatenated. The remaining data is processed as data to be discarded. As a result, (n + 1) first size data transmitted in order from the first data receiving / transmitting device of the present invention according to any one of the aspects described above is obtained by multiplying the first size by the integer (n) and It can be processed as data of the sum of the first predetermined size.

The second receiver of the present invention is
A first transmission processing unit configured to transmit the integer (n + 1) -th data of the integer (m) -th divided data as data of a first predetermined size every time an integer (m) -number of divided data is transmitted. A receiving device for receiving data transmitted from a first data receiving / transmitting device comprising:
When the last data of the integer (n + 1) received from the first data receiving / transmitting device has the first size, the data up to the integer (n) of the received integer (n + 1) data Is processed as data to be concatenated with the received first size, and for the integer (n + 1) th data, only data up to the first predetermined size of the received first size data is concatenated. It is recognized that the data to be processed and received next is a series of data to be concatenated, and the last data of the integer (n + 1) received from the first data receiving / transmitting device is the first data When it is not the size, the data up to the integer (n) number of the received integer (n + 1) data is concatenated with the received first size. Whether or not the integer (n + 1) th data is processed as the data to be concatenated, and the data to be received next is data concatenated according to the contents of the received data. Data reception processing means for recognizing that
It is a summary to provide.

  In the second receiving apparatus of the present invention, when the last data of the integer (n + 1) received from the first data receiving / transmitting apparatus is the first size, the integer of the received integer (n + 1) data The data up to (n) pieces is processed as data that is concatenated with the received first size, and the integer (n + 1) th piece of data is the first predetermined size of the received first size data. Only the data up to this is processed as concatenated data, and the next received data is also recognized as a series of concatenated data, and the last of the integers (n + 1) received from the first data receiving / transmitting apparatus When the data is not the first size, the data up to the integer (n) number of the received integer (n + 1) data is concatenated with the received first size. Whether the received data is processed as concatenated data for the integer (n + 1) th data and whether the next received data is data connected according to the content of the received data Recognize that should be judged. When the last data of the integer (n + 1) received from the first data receiving / transmitting device is the first size, the next received data can be received as the concatenated data, so that the throughput can be improved. Can be planned.

The second data receiving / transmitting device of the present invention comprises:
A second data receiving / transmitting device for receiving and transmitting data,
Second data storage means capable of storing data;
Second reception processing means for receiving integer (p + 1) pieces of third size data and storing the data in the second data storage means;
A second obtained by adding the second predetermined size to the size obtained by multiplying the integer (p) by the integer (p) of the integer (p + 1) third size data stored in the second data storage means. Second transmission processing means for transmitting as data of size 4,
It is a summary to provide.

  In the second data reception / transmission apparatus of the present invention, the integer (p + 1) third size data is received and stored in the second data storage means, and the integer (p + 1) pieces of data stored in the second data storage means are stored. The third size data is transmitted as the fourth size data obtained by adding the second predetermined size to the size obtained by multiplying the third size by the integer (p). Since the integer (p + 1) pieces of the third size data can be transmitted as one piece of the fourth size data, the throughput can be improved.

The data transmission / reception system of the present invention includes:
The first data receiving / transmitting device of the present invention according to any one of the aspects described above, that is, basically the first data receiving / transmitting device that receives and transmits data, and is capable of storing data. And means for receiving the original data as a plurality of divided data obtained by dividing the original data by a second predetermined size larger than a size obtained by multiplying the first size by an integer (n). A first reception processing unit that stores the plurality of stored divided data in order as integer (n + 1) first size data, and a first data reception / transmission device that includes: A second data receiving / transmitting device for receiving and transmitting data, the second data storing means capable of storing the data, and the second data receiving the integer (p + 1) third size data; Storage means A second reception processing means for storing and an integer (p + 1) number of third size data stored in the second data storage means to a size obtained by multiplying the third size by an integer (p); A second data reception / transmission apparatus having a second transmission processing unit that transmits data of a fourth size obtained by adding two predetermined sizes,
The third size is the first size;
The fourth size is the second size;
The integer (p) matches the integer (n)
The second predetermined size is the same as the first predetermined size.

  In the data transmission / reception system of the present invention, the first data reception / transmission apparatus divides the original data into second sizes larger by a first predetermined size than the size obtained by multiplying the first size by an integer (n). The divided data is received and stored in the first data storage means, and the plurality of stored divided data are sequentially transmitted as integer (n + 1) pieces of first size data and transmitted by the second data receiving / transmitting apparatus. Integer (n + 1) first size data is received and stored in the second data storage means, and the integer (n + 1) first size data stored in the second data storage means is stored in the second data storage means. The data is transmitted as data of a second size obtained by adding the first predetermined size to the size obtained by multiplying the size of 1 by an integer (n). Since a plurality of pieces of divided data of the second size obtained by dividing the original data by the first data receiving / transmitting apparatus are sequentially transmitted as integer (n + 1) pieces of first size data, only one piece of divided data can be transmitted. Throughput can be improved as compared with a system using an apparatus.

The first data reception / transmission method of the present invention comprises:
A data receiving and transmitting method for receiving and transmitting data,
(A) Receiving and storing the original data as a plurality of divided data obtained by dividing each of the original data by a first predetermined size larger than a size obtained by multiplying the first size by an integer (n);
(B) transmitting the plurality of stored divided data as integer (n + 1) first size data in order;
This is the gist.

  In the first data receiving and transmitting method of the present invention, the original data is divided into a plurality of divided data obtained by dividing the original data into second sizes that are larger by a first predetermined size than the size obtained by multiplying the first size by an integer (n). Receive and store, and transmit the plurality of stored divided data as integer (n + 1) first size data in order. As a result, a plurality of pieces of divided data can be sequentially transmitted as integer (n + 1) pieces of first size data, so that throughput can be improved as compared with an apparatus that can send only one piece of divided data.

The data reception / transmission method of the present invention comprises:
A data receiving and transmitting method for receiving and transmitting data,
(A) receive and store integer (p + 1) pieces of third size data;
(B) A fourth size obtained by adding the second predetermined size to the size obtained by multiplying the stored integer (p + 1) third size data by the third size and the integer (p). Send as data,
This is the gist.

  In the data reception / transmission method of the present invention, integer (p + 1) third-size data is received and stored, and the stored integer (p + 1) third-size data is stored in the third size. It transmits as data of the 4th size obtained by adding the 2nd predetermined size to the size obtained by multiplying by the integer (p). Since integer (p + 1) pieces of the third size data can be transmitted as the fourth size data, the throughput can be improved.

  Next, the best mode for carrying out the present invention will be described using examples.

  FIG. 1 is a configuration diagram showing an outline of a configuration of a printing system 10 functioning as a data reception / transmission system according to an embodiment of the present invention. The printing system 10 includes a printer 20 that functions as a USB host and prints received data, a dongle 40 that is connected to the USB port 22 of the printer 20 and functions as a USB device, and can be connected to a network 60 such as a wireless LAN. The printer 20 receives print data transmitted from the client terminal 70 via the network 60 and the dongle 40, and prints the print data on a print medium such as paper.

  The printer 20 is configured as a general electrophotographic color laser printer, and includes a main controller 24 that controls the entire printer 20, a printer engine 34 that performs printing, and a dongle 40 inserted into the USB port 22. And a USB host controller 36 for controlling the connection.

  The main controller 24 is configured as a microcomputer centering on a CPU 26, and includes a ROM 28 for storing programs, a RAM 30 for temporarily storing data, an EEPROM 32 as a nonvolatile memory, and the like. In the EEPROM 32, a data processing program 32a for processing data received by the USB host controller 36 is stored. The data processing program 32 a starts when the dongle 40 is inserted into the USB port 22, receives data transmitted from the dongle 40 to the CPU 26 of the main controller 24, and displays an image using the received data with the printer engine 34. Execute the printing process.

  The USB host controller 36 periodically transmits a request signal for requesting transmission and reception of data to the dongle 40 connected to the USB port 22, and only when the dongle 40 transmits and receives data according to the request signal for a predetermined time. Data transmission / reception is accepted, and data transmission / reception is interrupted when a predetermined time elapses.

  The printer engine 34 is the same as a general laser printer and does not form the core of the present invention.

  The dongle 40 includes a CPU 42 that controls the entire dongle 40, a ROM 44 that stores programs, a RAM 46 that temporarily stores data, an EEPROM 48 that serves as a nonvolatile memory, and a network controller 50 that controls connection to the network 60. And a USB device controller 52 that manages connection with the USB host controller 36 of the printer 20.

  The EEPROM 48 stores a data transmission / reception program 48 a for receiving print data transmitted from the client terminal 70 via the network 60 via the network controller 50 and transmitting it to the printer 20. The data transmission / reception program 48 a starts when the dongle 40 is inserted into the USB port 22 of the printer 20, and transmits data received by the network controller 50 to the CPU 42 from the USB device controller 52 to the USB host controller 36 of the printer 20. Execute the process.

  The network controller 50 monitors the network 60 and the USB device controller 52, receives data including the IP address of the printer 20 on the network 60 in the header, and transmits data from the USB device controller 52 to the network 60. .

  The USB device controller 52 includes a register 52a that temporarily stores data. When the request signal transmitted from the USB host controller 36 is received, the USB device controller 52 sequentially stores the data stored in the register 52a as data up to a size of 512 bytes. To the USB host controller 36 or receive data from the USB host controller 36 and store it in the register 52a. As described above, the time for receiving data reception by the USB host controller 36 with one request signal is limited. Therefore, the USB device controller 52 is limited in advance in the number of data that can be transmitted with respect to one request signal of the USB host controller 36. In the embodiment, the size of up to 512 bytes with respect to one request signal. It is assumed that up to 8 pieces of data can be transmitted.

  Next, an operation of the printing system 10 configured as described above, particularly an operation of receiving print data transmitted from the client terminal 70 by the printer 20 via the dongle 40 will be described. First, the operation when the print data is transmitted by the client terminal 70 will be described. Next, the operation when the data received by the dongle 40 is transmitted to the printer 20 will be described. The operation when receiving data will be described. 2 shows a process executed by a CPU (not shown) of the client terminal 70 of the printing system 10, a process executed by the CPU 42 of the dongle 40, a process executed by the CPU 26 of the main controller 24 of the printer 20, and the client terminal 70 and the dongle. 40 is an explanatory diagram showing an example of the size of data transmitted and received between the printers 20.

  First, an operation when print data is transmitted from the client terminal 70 will be described. The processing at the client terminal 70 is executed when the printer driver of the client terminal 70 is activated when the user instructs printing of an image file or the like using application software installed on the client terminal 70. In this process, a process of dividing the print data into a plurality of pieces from the client terminal 70 to the network 60 and sequentially transmitting them as the divided data is executed (step S100), and the process ends. In the embodiment, the divided data is data having a size of up to 1514 bytes including a header including the IP address of the printing destination device and identification information indicating what the original print data of each divided data is. Assume that the data is transmitted to the network 60.

  Next, an operation when the divided data received by the dongle 40 is transmitted to the printer 20 will be described. The processing in the dongle 40 is executed when the network controller 50 of the dongle 40 detects divided data including the IP address of the printer 20 in the header on the network 60. In this process, first, when the network controller 50 receives 1514 bytes of divided data (step S110), a buffer area of 1536 bytes is secured in the register 52a of the USB device controller 52, and 1514 bytes from the start address of the secured buffer area. (Step S120). In this process, 22 bytes of buffer area is reserved for the 1514-byte divided data, so the data after the 1515th byte address of the buffer area is not originally included in the received divided data. It becomes.

  Subsequently, when the second divided data is received by the network controller 50 (step S130), a buffer area of 1514 bytes is secured in the USB device controller 52, and the received second divided data is stored in the secured buffer area. When the USB device controller 52 receives the request signal transmitted from the USB host controller 36 (step S140), the divided data stored in the buffer area is received as data having a size of up to 512 bytes in the order received. The data is transmitted to the USB host controller 36 (step S150). In the embodiment, first, three pieces of 512-byte data are transmitted from the 1536-byte buffer area secured in the process of step S120. In this way, the first two pieces of data are the data included in the original divided data, but the third piece of data is the 490-byte size data included in the original divided data and the original data. That is, it is composed of 22-byte data not included in the divided data. Subsequently, two pieces of 512-byte size data and one piece of 490-byte size data are transmitted from the 1514-byte size buffer area secured in step S140. In this way, the three pieces of data are composed only of the data included in the original divided data.

  The reason for sending data in this way when sending data from the USB device controller 52 to the USB host controller 36 of the printer 20 is as follows. As described above, the USB device controller 52 can transmit up to eight pieces of data having a size of up to 512 bytes for one request signal transmitted from the USB host controller 36. That is, since the USB device controller 52 can only transmit data up to a size of 4096 bytes, which is 8 times the size of 512 bytes, for a single request signal, the network controller 50 converts the divided data of 1514 bytes to 3 Even if it is received more than the size, that is, the size of 4542 bytes or more, only two divided data can be transmitted with one request signal. As will be described later, when the USB device controller 36 of the printer 20 receives data of less than 512 bytes, it determines that the received data for one request signal is complete, so the second divided data is the last. By setting the data to be transmitted to a size of 490 bytes, the USB host controller 36 can be notified of the end of the transmission data. For this reason, the second divided data is stored in the 1514-byte buffer area in the process of step S140, so that the data to be transmitted last in the process of step S150 is 490-byte size data.

  When the network controller 50 receives the divided data after executing the processing of step S150, the same processing as the processing from step S110 to step S150 is repeatedly executed until the final divided data is received, and this processing ends.

  As described above, the dongle 40 transmits the 1514-byte divided data transmitted from the client terminal 70 by dividing the first divided data to the printer 20 as three 512-byte data. Is transmitted to the printer 20 as two pieces of 512-byte data and one piece of 490-byte data, and the network controller 50 receives the last piece of divided data, and the processing for this data is completed. Repeat this process until

  Next, the operation when the USB host controller 36 of the printer 20 receives data transmitted from the dongle 40 will be described. The processing in the printer 20 is executed after transmitting a request signal to the USB device controller 52 of the dongle 40. First, a data reception process for receiving data transmitted from the USB device controller 52 is executed (step S160). FIG. 3 is a flowchart illustrating an example of the data reception process. First, data is received (step S162), and it is determined whether the received data is 512 bytes (step S164). When the received data is 512 bytes, it is determined that the data is transmitted continuously from the USB device controller 52 of the dongle 40, and the received 512-byte data is stored in the buffer area secured in the RAM 30 of the printer 20 (step S166).

  Subsequently, it is determined whether or not the size of the untransmitted data stored in the buffer area has reached 1536 bytes, which is three times the size of 512 bytes (step S168). When the size of the untransmitted data in the buffer area has not reached 1536 bytes, the process returns to step S162, the next data is received, and the processes after step S164 are executed. In the embodiment, since three 512-byte data corresponding to the first divided data are transmitted from the USB device controller 52 of the dongle 40, steps S162 to S168 are received until the third data is received. The process is repeated.

  When the size of untransmitted data in the buffer area reaches 1536 bytes, that is, when the third 512-byte data is stored in the buffer area, the size of the 1536-byte data stored in the buffer area Of the untransmitted data, 1514-byte data excluding 22-byte data not included in the original divided data transmitted from the client terminal 70 is transmitted to the printer engine 34 (step S170). As described above, among the 1514-byte divided data transmitted by dividing from the client terminal 70, the three 512-byte data corresponding to the first divided data are included in the original divided data. Data having a size of 22 bytes that is not present can be deleted and transmitted to the printer engine 34 as data having a size of 1514 bytes.

  When the data transmission is completed, the process returns to the process of step S162, the next data is received, and the processes after step S164 are executed. Thus, the processing from step S162 to step S170 is executed until data of less than 512 bytes is received.

  When the received data is less than 512 bytes (step S164), it is determined that the received data is the last data transmitted from the USB device controller 52 of the dongle 40 in response to one request signal. The byte size data is stored in the buffer area secured in the RAM 30 of the printer 20 (step S172), and the untransmitted data in the buffer area is transmitted as transmission data to the printer engine 34 (step S174) for data reception. The process ends. When executing the processing of step S154, in the embodiment, in the buffer area, three 512-byte data corresponding to the first divided data have already been transmitted, and the second divided data is converted into the second divided data. Since two corresponding 512-byte data and one 490-byte data are stored, two 512-byte data corresponding to the second divided data in the process of step S174. And one piece of 490-byte data is transmitted to the printer engine 34 as 1514-byte data.

  Here, returning to FIG. 2, the description will be continued. When the process of step S160 shown in FIG. 2 is executed, the next request signal is transmitted to the USB device controller 52 of the dongle 40. If the data is stored in the register 52a of the USB device controller 52, the same processing as that in step S160 is executed. If there is no more data stored in the register 52a of the USB device controller 52, the printer 20 The process of receiving data ends. As described above, the USB host controller 36 of the printer 20 sequentially receives data transmitted from the USB device controller 52 of the dongle 40 and sequentially transmits it to the printer engine 34 as data having a size of up to 1514 bytes. The printer engine 34 executes printing using the transmitted data.

  According to the printing system 10 of the embodiment described above, the client terminal 70 is within the range of the number of data that can be transmitted in response to one request signal from the USB device controller 52 of the dongle 40 to the USB host controller 36 of the printer 20. More divided data transmitted from can be transmitted. Accordingly, it is possible to improve the throughput of the entire system as compared with the case where only one divided data can be transmitted with one request signal.

  Here, the register 52a of the USB device controller 52 of the dongle 40 in the printing system 10 of the embodiment corresponds to the first data storage unit, and the CPU 42 of the dongle 40 that executes the process of receiving the data transmitted from the client terminal 70 is provided. The CPU 42 of the dongle 40 that corresponds to the first reception processing means and executes the process of transmitting the divided data as 512-byte data corresponds to the first transmission processing means. In addition, the CPU 26 that executes the process of converting the data transmitted from the dongle 40 into the received data up to 1514 bytes in the printer 20 of the printing system 10 of the embodiment corresponds to a data reception processing unit. The RAM 30 of the printer 20 in the printing system 10 of the embodiment corresponds to the second data storage unit, and the CPU 26 of the printer 20 that executes the process of receiving the data transmitted from the dongle 40 and storing it in the RAM 30 is the second reception. The printer 20 corresponds to a processing unit and executes processing for transmitting two 512-byte data and one 490-byte data stored in the RAM 30 to the printer engine 34 as 1514-byte data. The CPU 26 corresponds to a second transmission processing unit. Furthermore, the dongle in the printing system 10 of the embodiment corresponds to the first data reception / transmission device, and the printer 20 corresponds to the second data reception / transmission device.

  In the printing system 10 of the embodiment, a buffer area having a size of 1536 bytes is secured in the register 52a of the USB device controller 52 in the process of step S120, but the size of the secured buffer area is the data received by the dongle 40. And the integer multiple of the size of one piece of data transmitted from the USB device controller 52 to the USB host controller 36 of the printer 20. Therefore, if a reduction in throughput is allowed, a buffer area having a size of an integer multiple larger than three times 512 bytes, for example, a size of 2048 bytes, which is four times larger, is stored in the register 52a of the USB device controller 52 in the process of step S120. It is good also as what secures.

  In the printing system 10 of the embodiment, the size of the divided data received by the dongle 40, that is, the size of the divided data transmitted from the client terminal 70 is 1514 bytes. However, the size of the divided data is the client terminal 70. Any size of data may be used as long as it is a size allowed as a communication size between the dongle 40 and the dongle 40. In addition, although data of 256 bytes is transmitted from the USB device controller 52 of the dongle 40 to the USB host controller 36 of the printer 20, the size of the data to be transmitted is between the USB device controller 52 and the USB host controller 36. Data of any size may be used as long as it is an allowable size. In such a case, it is set appropriately according to the size of the divided data received by the dongle 40 in the process of step S120 and the size of the data transmitted from the USB device controller 52 of the dongle 40 to the USB host controller 36 of the printer 20. For example, the size of data received by the dongle 40 is 500 bytes, and when data of 256 bytes is transmitted from the USB device controller 52 to the USB host controller 36, the size is 512, which is larger than 500 bytes and twice the size of 256 bytes. A buffer area having a byte size may be secured.

  In the printing system 10 of the embodiment, the divided data having the size of 1514 bytes is stored in the buffer area having the size of 1536 bytes in the process of step S120. However, in the process of step S120, the data having the size of 1514 bytes is stored in 512 bytes. It is only necessary to process the data as 1536 bytes, which is three times the size of the received data. Therefore, 22 bytes of data is added to the received divided data of 1514 bytes to obtain 1536 bytes of data in the register 52a of the USB device controller 52. It may be stored.

  In the printing system 10 according to the embodiment, the dongle 40 can transmit up to eight pieces of data having a size of up to 512 bytes for one request signal transmitted from the USB host controller 36 of the printer 20. The size and number of such data are not limited to the size and number described in the embodiment, and the data transfer speed between the USB device controller 52 of the dongle 40 and the USB host controller 36 of the printer 20 is 1 degree. The size of the data that can be transmitted to the USB host controller 36 may be set as appropriate based on the time at which the USB host controller 36 receives data for one request signal.

  In the printing system 10 of the embodiment, when the second divided data is received from the client terminal 70 in the process of step S140, the second divided data is stored in a buffer area having a size of 1514 bytes. In the case where the size of the print data transmitted from the terminal 70 is relatively small and all data can be transmitted with a single request signal, the division received after analyzing the information included in the header of the divided data after receiving the data When the data is the last divided data transmitted from the client terminal 70, the data may be stored in a 1514-byte buffer area.

  In the printing system 10 of the embodiment, the data transmitted from the dongle 40 is received by the printer 20. However, the data transmitted from the printer 20 is received by the dongle 40 by reversing the data transmission and reception. Also good.

  In the printing system 10 of the embodiment, the buffer area is secured in the register 52a of the USB device controller 52 in the dongle 40. However, the buffer area may be secured in any storage means as long as it can store data. For example, a buffer area may be secured in the RAM 46, or when the dongle 40 includes an external storage device such as an HDD, the buffer area may be secured in such an external storage device.

  In the printing system 10 of the embodiment, the buffer area is secured in the RAM 30 in the printer 20, but the buffer area may be secured in any storage means as long as the data can be stored. When an external storage device such as an HDD is provided, a buffer area may be secured in such an external storage device, and when the USB host controller 36 is provided with a register, a buffer area may be secured in the register. .

  In the embodiment, the application of the present invention to the printing system 10 has been described. However, the present invention receives the first divided transmission apparatus that receives the divided data transmitted from the client terminal 70 and transmits the divided data. The present invention may be applied to any system provided with a second data receiving / transmitting device that receives and transmits data from the receiving / transmitting device, and the data received by the first receiving / transmitting device is also limited to print data. The data may be various types of data.

  In the embodiment, the present invention is applied to a system constituted by a first reception / transmission apparatus that receives and transmits divided data and a second data reception / transmission apparatus that receives and transmits data from the first reception / transmission apparatus. Although the application has been described, the present invention may be applied to one device including the first reception / transmission device and the second reception / transmission device.

  The best mode for carrying out the present invention has been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the gist of the present invention. Of course, it can be implemented in the form.

1 is a configuration diagram showing an outline of the configuration of a printing system 10 as an embodiment of the present invention. Explanatory drawing which shows an example of the size of the data performed and the process performed by each apparatus and transmitted / received. The flowchart which shows an example of a data reception process.

Explanation of symbols

10 printing system, 20 printer, 22 USB port, 24 main controller, 26 CPU, 28 ROM, 30 RAM, 32 EEPROM, 32a data processing program, 34 printer engine, 40 dongle, 42 CPU, 44 ROM, 46 RAM, 48 EEPROM , 50 network controller, 52 USB device controller, 52a register, 60 network, 70 client terminal.

Claims (10)

A first data receiving / transmitting device for receiving and transmitting data,
First data storage means capable of storing data;
The original data is received as a plurality of divided data obtained by dividing each of the first size by a first predetermined size larger than the size obtained by multiplying the first size by an integer (n) and stored in the first data storage means. First reception processing means;
First transmission processing means for sequentially transmitting the plurality of stored divided data as integer (n + 1) first size data;
A first data receiving / transmitting device.   The first transmission processing means obtains the first predetermined size from the first size for the remaining integer (n + 1) th data obtained by dividing the divided data into integer (n) first size data. 2. The first data receiving / transmitting device according to claim 1, wherein the first data receiving / transmitting device is means for transmitting the data as a first size obtained by adding adjustment data having a reduced size. The first data receiving / transmitting device according to claim 1,
The first reception processing means secures and stores a storage area of a storage size obtained by multiplying the first size by an integer (n + 1) when storing the divided data in the first data storage means. Means,
The first transmission processing unit is a first data receiving / transmitting device that transmits the divided data stored in the storage area of the storage size in order as integer (n + 1) first size data.   The first transmission processing unit transmits the integer (m + 1) th divided data of the integer (m) th divided data as the data of the first predetermined size every time the integer (m) divided data is transmitted. 4. The first data reception / transmission apparatus according to claim 1, wherein the first data reception / transmission apparatus is a means for performing transmission. A receiving device for receiving data transmitted from the first data receiving / transmitting device according to claim 1,
Of the integer (n + 1) first size data received from the first data receiving / transmitting device, the data up to the integer (n) number is processed as the data to be concatenated with the received first size. For the integer (n + 1) th data, the data up to the first predetermined size among the received first size data is processed as concatenated data, and the remaining data is processed as data to be discarded Reception processing means,
A receiving device. A receiving device for receiving data transmitted from the first data receiving / transmitting device according to claim 4,
When the last data of the integer (n + 1) received from the first data receiving / transmitting device is the first size, the data up to the integer (n) of the received integer (n + 1) data Is processed as data to be concatenated with the received first size, and for the integer (n + 1) th data, only data up to the first predetermined size of the received first size data is concatenated. It is recognized that the data to be processed and received next is a series of data to be concatenated, and the last data of the integer (n + 1) received from the first data receiving / transmitting device is the first data When it is not the size, the data up to the integer (n) number of the received integer (n + 1) data is concatenated with the received first size. Whether or not the integer (n + 1) th data is processed as the data to be concatenated, and the data to be received next is data concatenated according to the contents of the received data. Data reception processing means for recognizing that
A receiving device. A second data receiving / transmitting device for receiving and transmitting data,
Second data storage means capable of storing data;
Second reception processing means for receiving integer (p + 1) pieces of third size data and storing the data in the second data storage means;
A second obtained by adding the second predetermined size to the size obtained by multiplying the integer (p) by the integer (p) of the integer (p + 1) third size data stored in the second data storage means. Second transmission processing means for transmitting as data of size 4,
A second data receiving / transmitting device. A data reception / transmission system comprising the first data reception / transmission device according to any one of claims 1 to 4 and the second data reception / transmission device according to claim 7.
The third size is the first size;
The fourth size is the second size;
The integer (p) matches the integer (n)
The data reception / transmission system, wherein the second predetermined size matches the first predetermined size. A data receiving and transmitting method for receiving and transmitting data,
(A) Receiving and storing the original data as a plurality of divided data obtained by dividing each of the original data by a first predetermined size larger than a size obtained by multiplying the first size by an integer (n);
(B) transmitting the plurality of stored divided data as integer (n + 1) first size data in order;
Data reception and transmission method. A data receiving and transmitting method for receiving and transmitting data,
(A) receive and store integer (p + 1) pieces of third size data;
(B) A fourth size obtained by adding the second predetermined size to the size obtained by multiplying the stored integer (p + 1) third size data by the third size and the integer (p). Send as data,
Data reception and transmission method.

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