JPS63137346A - Buffer control system for data transfer - Google Patents

Abstract

PURPOSE:To improve the efficiency of data transfer by extracting data from a buffer in accordance with a fixed order, connecting them and forming a transfer unit. CONSTITUTION:While checking whether plural buffers 16 to which level numbers corresponding to the processing order of data are applied are unused or not by a connecting means 14 in the order of the level numbers, data are stored in the unused buffers. Whether the data length of data to be stored in the buffer 16 exceeds a transfer available length or not is checked by a dividing means 18, and when the length exceeds, the data are divided at that point of time and data overflowing from the capacity of the buffer 16 are stored in the unused buffer 16 of the succeeding level number. After storing data in the buffers 16, the data are extracted from respective buffers 16 and connected in accordance with an independently fixed order to form a transfer unit and transfer data to an opposite information processor 12 through a communication line 19.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a data transfer system that transfers data between information processing devices connected via a communication line. The present invention relates to a buffer control method for data transfer in which data transfer is determined to be divided when the transferable length is exceeded.

Note that in the present invention, data includes so-called data and commands.

〔overview〕

The present invention provides a buffer control method for data transfer in which data (including commands) is concatenated or divided in a predetermined manner using a buffer and transferred between information processing devices connected via a communication line. A plurality of buffers are provided with level numbers corresponding to the processing order, and data is stored in the unused buffers in the order of the level numbers, and during storage, the data length of the data stored in the buffers reaches the transferable length. If the data exceeds the number, the data is divided and stored in the buffer of the next level number, and in order to improve the data transfer efficiency, the data is extracted from the buffer and concatenated in a separately determined order to generate a transfer unit. This facilitates data transfer processing with high transfer efficiency and prevents resource shortages.

[Conventional technology]

Conventionally, in systems that transfer data between information processing apparatuses connected via a communication line, a single buffer is used and the data are connected in the order in which a user program issues a transmission request. Furthermore, there was no system in which it was determined that connections should be made in an order different from the order in which transmission requests were issued. Therefore, even if it was necessary to divide the files, there was no need to consider the order in which they should be concatenated.

[Problem that the invention seeks to solve]

In the conventional data transfer buffer control method described above, a single buffer is controlled, so in order to improve data transfer efficiency and to achieve a certain concatenation order that differs from the transmission request, data must be rearranged. The disadvantage is that processing is difficult. Furthermore, if the division is performed once the connection is completed, there is a drawback that resources may become insufficient.

SUMMARY OF THE INVENTION An object of the present invention is to provide a buffer control method for data transfer that facilitates data transfer processing with high transfer efficiency and that does not cause resource shortages by eliminating the above-mentioned drawbacks.

Means/Means for Solving Problem C] The present invention provides a method of data transfer in which data to be transferred is temporarily stored in a buffer and then concatenated or divided in a predetermined manner between information processing devices connected via a communication line. In the buffer control method, the buffer is composed of a plurality of buffers given level numbers corresponding to the processing order of the data,
a linking means for storing the data in the unused buffer in the order of the level number, extracting and linking the stored data in a predetermined linking order to generate a transfer unit; The present invention is characterized in that it includes a dividing means for dividing the data and storing it in an unused buffer of the next level number when the data length exceeds the transferable length.

[For production]

Concatenation means checks in order of level numbers whether the buffers are unused or not for multiple (minimum number of buffers that must be concatenated) given level numbers corresponding to the processing order of data (including commands). At the same time, data is stored in unused buffers. Then, the dividing means checks whether the data length of the data to be stored in this buffer exceeds the transferable length. If it exceeds, the data is divided at that point and the data that cannot be stored in the buffer is is stored in an unused buffer at the next level number. After the data has been stored in the buffer, the linking means extracts data from each buffer in a separately determined order and links them to generate a transfer unit, which is then transferred to the other party's information processing device via the communication line. do.

Therefore, in order to improve transfer efficiency, even if the data is concatenated in a different order from the user program's transmission request, there is no need to rearrange the data, and there is no need to increase resources for partitioning. , it becomes possible to easily perform data transfer with high transfer efficiency without increasing resources.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In this embodiment, an information processing device 11 and an information processing device 12 are connected via a communication line 19 to transfer data (including commands), and data is transferred from the information processing device 11 to the information processing device 12. Indicates when to do so.

The information processing device 11 includes data (including commands) l3, a buffer group 16 consisting of four buffers 1, 2, 3, and 4 to which a level number 17 corresponding to the processing order of the data 13 is given, and data 13. unused buffer L
2.3 or 4 in the order of level number 17, and a concatenation means 14 for taking out the stored data in a predetermined concatenation order and concatenating it as a transfer unit 15;
If the data length of the data to be stored in 3 or 4 exceeds the transferable length, the division means 18 divides the data and stores it in the unused buffer of the next level number.

A feature of the present invention is that, in FIG. 1, a connecting manual work 4, a buffer group 16, and a dividing means 18 are provided.

Next, the operation of this embodiment will be explained.

The information processing device 11 performs data transfer with the information processing device 12 via the communication line 19. The data 13 is a unit of data or command to be transmitted, and the command includes information according to the agreement necessary for communication between the information processing devices. The concatenation means 14 concatenates several pieces of data 13 in a predetermined order, and transfers the data 13 as a transfer unit 1.
Create 5. The maximum number of data constituting the transfer unit 15 is determined.

Also, commands of the same type are never concatenated.

The information processing device 12 separates the received transfer unit 15 into commands or so-called data, and processes them in the order in which the information processing device 11 made the transmission request. The buffer group 16 has the maximum number of buffers that can be connected.

Level number 17 is added to each buffer 1.2.3 and 4.

The dividing means 18 divides the data unit in the buffer to create a transfer unit 15 when the data length of the data exceeds the transferable length during concatenation. The transfer unit 15 is transferred to the information processing device 12.

FIG. 2 is a partial detailed view for explaining the operation of the connecting means 14 and dividing means 18 of FIG. 1. Below, the second
This will be explained in more detail with reference to the drawings.

The information processing device 11 stores data 13a and data 13b1.
A transmission request is issued to the connecting means 14 in the order of data 13c and data 13d.

First, when the connecting means 14 receives the data 13a and receives the zero-order data 13b to be stored in the buffer 1,
Stores data from the buffer after the last data stored in the buffer. In this case, data 13b is stored in buffer 2. In this way, data 13c is transferred to buffer 3 in order.
When the data 13d is stored in the buffer 4, the connecting means 14
Now, in order to increase data transfer efficiency, the transfer units 15 are created by connecting them in a separately patterned order.

The connecting means 14 connects the data in a predetermined order,
When data is received, it instructs the dividing means 18 to divide the data if necessary. Dividing means 1
8 compares the sum of the data length of the data held in the buffer and the data length of the received data with the transferable length. If it is shorter than the transferable length, the data is stored in the buffer, but if it exceeds the transferable length, the difference between the data length of the data held in the buffer and the transferable length is not received. The transferred data is concatenated to create a transfer unit 15, and the remaining data is stored in an unused buffer of the next level number. When there is a next request to send data, the linking means 14 stores the data from the buffer that is currently stored, without being aware that it has been divided.
Data can be linked.

〔Effect of the invention〕

As described above, the present invention has the advantage that when data (including commands) is to be concatenated, it is sufficient to simply connect a plurality of buffers in a predetermined order, which facilitates processing. Furthermore, if it is necessary to divide the data, it is divided midway through the connection to create a transfer unit, which has the effect of preventing a shortage of resources for storing data.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a block configuration diagram showing partial details thereof. 11.12... Information processing device, 13.13a-1'3
d... Data, 14... Connection means, 15... Transfer unit, 16... Bath sofa group, 17... Level number, 18... Division means. Patent applicant agent -・), implementation f1 (overall configuration diagram) Figure 1

Claims (1)

[Claims] (1) Between information processing devices connected via a communication line,
In a data transfer buffer control method in which data to be transferred is temporarily stored in a buffer and then concatenated or divided in a predetermined manner, the buffer is composed of a plurality of buffers assigned level numbers corresponding to the processing order of the data, Connecting means (14) that stores the data in the unused buffer in the order of the level numbers, extracts and connects the stored data in a predetermined linking order, and generates a transfer unit.
), and a dividing means (18) for dividing the data and storing it in an unused buffer of the next level number when the data length of the data to be stored in the buffer exceeds the transferable length. A buffer control method for data transfer.