JPH03216047A - Character data transfer device - Google Patents

Abstract

PURPOSE:To relieve the CPU load for an electronic computer system and a communication processing unit by applying multiplexing to a data transmission/ reception between the electronic computer system and the communication processing unit. CONSTITUTION:A communication processing unit 30 applying the control of data transfer connecting to an electronic computer system 10 with plural terminal equipments 201-20n via a communication line is provided and the unit 30 is provided with a demultiplexing means 40 which multiplexes a data of 1 byte unit from the terminal equipments 201-20n, gives the result to the electronic computer system 10 and demultiplexes the data in 1 byte unit to the terminal equipments 201-20n and gives the result to the relevant terminal equipment 20. In this case, the data in 1 byte unit from each terminal equipment is multiplexed and transferred to the electronic computer system 10 for each prescribed time, demultiplexed of the data of 1 byte unit from the electronic computer system 10 and transferred to the relevant terminal equipments 201-20n. Thus, number of times of data transfer between the electronic system 10 and the communication processing unit 30 is saved to relieve the load of the CPU.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is applied to a character data transfer device of a communication processing device that controls character data transfer between a computer system and a terminal device. In particular, it relates to a character data transfer device used when data is transferred on a 1-byte basis between a business computer running on an electronic computer and a terminal device.

〔overview〕

The present invention provides a character data transfer device that multiplexes 1-byte data from each terminal device and transfers it to a computer system at predetermined time intervals.
By separating data in bytes and transferring it to the appropriate terminal device, the number of data transfers between the computer system and communication processing device is reduced, reducing the load on the CPU (central processing unit) of both devices. In addition, by periodically transferring fixed-length data for all terminal devices between both devices, it is possible to provide users with stable turnaround independent of data traffic and improve the performance and reliability of the online system. It has been made possible.

[Prior Art] Conventionally, character data transfer devices transmit and receive 1-byte data as is using a communication path set between a terminal device and a business program means on a computer system, or each terminal device The data transfer method involved transmitting and receiving blocks between a computer system and a communication processing device using a plurality of transfer units each having header information that identifies the data.

[Problem that the invention seeks to solve]

However, in such conventional character data transfer devices, the former is a method in which 1-byte data transferred between a terminal device and a communication processing device is transferred one-to-one between a computer system and a communication processing device. Therefore, in a system with a large number of terminal devices and high data traffic, the CPU processing capacity of the communication processing device and computer system I is strained, resulting in a disadvantage that the turnaround of the entire system becomes poor.

Also, the latter method is more efficient than the former because it blocks multiple transfer units, but in general, the header part of the transfer unit is longer than the 1-byte real data disk. As the amount of traffic increases, the amount of data and the number of transfers between the communication processing device and the computer system increase, resulting in deterioration of turnaround due to pressure on CPU processing capacity, and the drawback that it is difficult to obtain stable turnaround. .

The present invention solves the above-mentioned drawbacks, and aims to provide a character data transfer device that can reduce the CPU load of an electronic computer system and a communication processing device, and improve the performance and reliability of an online system.

[Means for solving problems]

The present invention provides a character data transfer device including a communication processing device that is connected to a computer system and controls data transfer to and from a plurality of terminal devices via a communication line, wherein the communication processing device is connected to a plurality of terminal devices. The method further comprises a demultiplexing means for multiplexing data in units of 1 byte and providing the data in units of 1 byte to the computer system, and separating data in units of 1 byte from the computer system to each of the terminal devices, and providing the data to the corresponding terminal device. shall be.

Further, the present invention further provides that the demultiplexing means includes a character data transfer control means for controlling data transfer in units of byte with each of the terminal devices, and data in units of byte from the character data transfer control unit is transferred to each of the terminal devices. A character data reception queue that stores data in units of 1 character corresponding to the terminal device, a data transfer buffer that stores data in units of 1 byte corresponding to each of the terminal devices, and a link between the computer system and the data transfer buffer. data transfer control means for controlling data transfer in 1-byte units of each of the above-mentioned terminal devices between them; timer control means for counting a predetermined time; character data assembly means for extracting data and providing it to the data transfer buffer and requesting the data transfer control means to transmit to the computer system; and character data assembly means for extracting data in units of bytes from the data transfer buffer and controlling the character data transfer and character data decomposition means for sending a request to the corresponding terminal device.

Multiplexing may be either parallel multiplexing or time division multiplexing.

[Effect]

The demultiplexing means multiplexes data in units of 1 byte from each terminal device and provides it to the computer system, and separates data in units of 1 byte for each terminal device from the computer system and provides it to the corresponding terminal device.

Furthermore, data in units of 1 byte inputted from the terminal device is stored in unit of character in a character data reception queue corresponding to each terminal device via the character data transfer control means. The character data assembler retrieves one queue that stores 1-byte data from the character data reception queue corresponding to each terminal device by a regular timer service from the timer control means.
The data is transferred to an area previously allocated to the terminal device on the data transfer buffer. When all the terminal devices have been transferred as described above and the data transfer buffers have been assembled, the data transfer control means is activated to issue a data transfer request to the electronic learning computer system.

Further, when data addressed to the terminal device is received from the computer system via the data transfer control means into the data transfer buffer, the character data decomposition means is activated. The character data decomposition means extracts one byte data from the area corresponding to each terminal device in the data transfer buffer, and issues a transmission request to the corresponding terminal device via the character data transfer control means. If there is no data to be transmitted or received between the terminal device and the computer system, it is possible to mark the data transfer buffer as having no data, depending on the agreement between the computer system and the communication processing device.

Through the above operations, transmission and reception between the terminal device and the computer system can be multiplexed between the computer system and the communication processing device, and at the same time, fixed length data for all terminal devices can be transferred periodically. A stable turnaround that does not depend on data traffic can be provided to terminal device users, and the performance and reliability of the online system can be improved.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings. 1st
The figure is a block diagram of a character data transfer device according to an embodiment of the present invention. In FIG. 1, the character data transfer device includes a communication processing device 30 that is connected to a computer system 1.10 and controls data transfer with a plurality of terminal devices 201 to 20, . . . via a communication line.

Here, the feature of the present invention is that the communication processing device 30
multiplexes data in 1-byte units from each terminal device 20, to 20h and provides it to the computer system 10, and each terminal device 20 to 20. Separate the 1-byte data for the corresponding terminal device 20
The demultiplexing means 40 for providing the same information to each other is included.

The demultiplexer 40 also includes a character data transfer control means 4l that controls data transfer in 1-byte units with each terminal device 20, and data in 1-byte units from the character data transfer control means 41 to each terminal device 20. A character data reception key -42, to 42 correspondingly stores data in units of one character, a data transfer buffer 45 storing data in units of byte corresponding to each terminal device 20, and a computer system 10 and data. Data transfer control means 4 that controls data transfer of each terminal device 20 in 1-byte units to and from the transfer buffer 45
6, a timer control means 43 for counting a predetermined time; and a timer control means 43 for counting a predetermined time; and a timer control means 43 that extracts data in units of bytes from the character data reception queue 42 every timed predetermined time, and provides the data to the data transfer buffer 45 and sends the data to the data transfer control means 46. Character data assembly means 4 that requests transmission to the system 10
4, and a character data decomposer 47 that extracts data in units of bytes from the data transfer buffer 45, provides it to the character data transfer control means 41, and issues a transmission request to the corresponding terminal device 20.

The operation of the character data transfer device having such a configuration will be explained. FIG. 2 is a flowchart showing the operation of the character data assembling means of the character data transfer device of the present invention. Third
The figure is a flowchart showing the operation of the character data decomposition means of the present invention.

In FIG. 1, when the character data transfer control means 41 receives data from any one of the terminal devices 201 to 20h, it decomposes the data into 1-byte units and receives the character data corresponding to the corresponding terminal device. Queue 421-42h
Register. The character data assembling means 44 is activated periodically at predetermined time intervals by the timer service of the timer control means 43, takes out one queue from the character data reception queue 42 of the corresponding terminal device in order for all the terminal devices 20, and fills the queue. The 1-byte data stored in the data transfer buffer 45 is transferred to the area corresponding to the corresponding terminal device. At this time, if the character data reception queue 42 of a certain terminal device is empty, "no data" is marked in the area of the data transfer buffer 45 corresponding to the corresponding terminal device. When the transfer of the 1-byte data described above for all terminal devices 20 under the communication processing device 30 is completed, the data transfer control means 46 is activated. However, if all the terminal devices 20 are marked as "no data", the data transfer control means 46 is not activated. The data transfer control means 46 transmits the contents of the data transfer buffer 45 passed from the character data assembly means 44 to the computer system 10.

Furthermore, when data is provided to the data transfer buffer 45 from the computer system 10, the data transfer control means 46 activates the character data decomposition means 47.

The character data decomposition means 47 sequentially extracts 1-byte data corresponding to each terminal device 20 from the contents of the data transfer buffer 45 from the beginning, and activates the character data transfer control means 41. At this time, if the 1-byte data storage area of the data transfer buffer 45 is marked as "no data", data retrieval is bypassed. The character data transfer control means 41 transmits data to the terminal device 20.

FIG. 2 shows that one queue is taken out from the character data receiving key 42 corresponding to the terminal device 20, and the 1-byte data stored in the queue is transferred to the corresponding area of the data transfer buffer 45 corresponding to the terminal device. An example of the operation of the character data assembling means 44, which activates the data transfer control means 46 and issues a data transfer request upon completion of transfer processing for all terminal devices 20, is shown. Due to the periodic timer service of the timer control means 43, the character data reception queue retrieval process (step 31) executes the character data reception queue retrieval process (step 31) to retrieve the character data reception queue 42 corresponding to the terminal device 20 under the communication processing device 30 in the order of definition of the terminal device 20. The first one is extracted, and the queue presence/absence determination process (step S2) is called to determine the presence/absence of the queue. If there is a queue, a 1-byte data transfer process (step S3) is called to transfer the 1-byte data stored in the queue to the area corresponding to the corresponding terminal device 20 in the data transfer buffer 45. If there is no queue,
The "no data" marking process (step S4) is called to mark the area of the data transfer buffer 45 corresponding to the corresponding terminal device 20 as "no data". After that, call all terminal device processing completion determination processing (step S5),
It is determined whether the above character data assembly processing for all terminal devices 20 has been completed. If the processing has not been completed, the character data reception queue retrieval processing (step 31) is called again to continue processing for the next terminal device 20. When the process is completed, the "no data" determination process for all terminal devices (step S6) is called, and the presence or absence of valid data in the data transfer buffer 45 is determined. If there is valid data, a data transfer control means activation process (step S7) is called to activate the data transfer control means 46. If there is no valid data, the process is immediately terminated.

In FIG. 3, the data transfer control means 46 is activated to sequentially extract one byte data from the beginning of the contents of the data transfer buffer 45, and then the character data transfer control means 41 is activated to send data to the corresponding terminal device 20. An example of the operation of the character data decomposition means 47 that makes a transfer request is shown. 1
The byte data extraction process (step S21) sequentially extracts one byte data from the first area of the data transfer buffer 45, calls the "no data" mark determination process (step S22), and checks whether the data is valid data or not. Determine. If there is valid data, a character data transfer control means activation process (step S23) is called to request data transmission to the terminal device 20, and then a process for determining whether all terminal device processing has been completed (step S24) is called. If there is no valid data, the process for determining the end of processing for all terminal devices (step S24) is immediately called.

The all terminal device processing completion determination process (step S24) determines whether or not the processing regarding all terminal devices 20 has been completed.
If the process has not been completed, the 1-byte data extraction process (step S21) is called again to continue the process.

〔Effect of the invention〕

As explained above, the present invention multiplexes data transmission and reception between a terminal device and a computer system between the computer system and the communication processing device, thereby improving communication between the computer system and the communication processing device. It is possible to reduce the number of data transfers and reduce the CPU load on both devices. In addition, by periodically transferring fixed-length data for all terminal devices between the computer system and the communication processing device, stable turnaround independent of data traffic can be provided to terminal device users, and the online system It has an excellent effect on improving the performance and reliability of the system.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a character data transfer device according to an embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the character data assembly means of the character data transfer device of the present invention. FIG. 3 is a flowchart showing the operation of the character data decomposition means of the character data transfer device of the present invention. 10...Electronic computer system, 201-20,...
Terminal device, 30... Communication processing device, 40... Demultiplexing means, 41... Character data transfer control means, 42. ~
42. . . . Character data reception queue, 43 . . . Timer control means, 44 . . . Character data assembly means, 45 .
Data transfer buffer, 46...data transfer control means,
47...Character data decomposition means. Implementation 1 Flowchart of character text assembling Jt Pl2 Diagram implementation t1 Flowchart of character text disassembly 1000 steps Horse 3 (21

Claims (1)

[Claims] 1. A character data transfer device that is connected to a computer system and includes a communication processing device that controls data transfer to and from a plurality of terminal devices via a communication line, wherein the communication processing device includes the above-mentioned Data in units of 1 byte from each terminal device is multiplexed and sent to the computer system.
A character data transfer device characterized by comprising a demultiplexing means for separating data in bytes and providing it to a corresponding terminal device. 2. The demultiplexing means includes a character data transfer control means for controlling data transfer in 1-byte units with each of the above-mentioned terminal devices, and a character data transfer control means for controlling data transfer in 1-byte units from this character data transfer control means to each of the above-mentioned terminal devices. and a character data reception queue that stores each character in units of characters, and one character data reception queue corresponding to each terminal device mentioned above
a data transfer buffer that stores data in bytes;
data transfer control means for controlling data transfer in 1-byte units of each terminal device between the computer system and the data transfer buffer; a timer control means for counting a predetermined time; character data assembling means for extracting data in units of bytes from the character data reception queue and supplying the data to the data transfer buffer and requesting the data transfer control means to transmit data to the computer system; 2. The character data transfer device according to claim 1, further comprising character data decomposition means for extracting the data and providing it to said character data transfer control means to request transmission to the corresponding terminal device.