JPS60223253A - Intermediate buffering system of communication processing system - Google Patents

Abstract

PURPOSE:To improve the throughout of a storage system by providing a common buffer memory between circuit correspondence parts and a file memory. CONSTITUTION:A common buffer memory 5 is provided between circuit correspondence parts 1-1-1-m and a file memory 3. The parts 1-1-1-m contain n-face buffer memories 2-1-2-n respectively and buffer data successively to transfer these data to a terminal connected to the memory 5 or either one of circuits a1-am. The transfer request given from the part 1-1 is immediately accepted by the memory 5 as long as the memory 5 has an idle area. While the queuing occurs at memories 2-1-2-n if the memory 5 is filled fully.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field to which the invention pertains) The present invention improves the transfer capacity of file memory by installing a common buffer memory in a storage type communication processing device, and effectively connects terminals with different communication speeds. This invention relates to an intermediate buffering method in a communication processing system accommodated in a communication processing device.

(Prior Art) Fig. 1 shows the configuration of a conventional storage type communication processing device, in which l-1-1-m is a line support section, 2-1 to 2-n are buffer memories, and 3 is a file memory. , 4 is a central control unit.

When the line support unit 1-1 receives data from the terminal connected to the line a1, the n-1 side of the pap memory 2-1 to 2-n, which has n sides, becomes full, and the other side becomes full. If at least one side is not made free beforehand, the buffer memory will overflow. Furthermore, when data is transmitted from the file memory 3 to the terminal via the line correspondence section, an underflow occurs if the buffer memory in the line correspondence section becomes all empty and there is no more data to be sent to the terminal. The probability of overflow/undeflow depends on the communication speed of the terminal, and increases for terminals with high communication speed. Therefore, there is a drawback that the service quality of the system deteriorates for high-speed terminals. Furthermore, in order to improve the quality of service for high-speed terminals, it is conceivable to use a storage medium with attributes of high throughput, but this has the drawback of requiring a redundant design for low-speed terminals.

(Object of the Invention) In order to solve these drawbacks, the present invention provides a common buffer memory between the line corresponding section and the file memory,
The present invention attempts to provide an intermediate buffering method in a communication processing system that improves the throughput of the storage system.

(Structure and operation of the invention) FIG. 2 is a block diagram of an embodiment showing the structure of the invention.
1-1 to 11 are line corresponding parts, 2-1 to 2-n are buffer memories, 3 is a file memory, and 4 is a central control unit, which is the same as in FIG. The difference from FIG. 1 is that a common buffer memory 5 is provided between the file memory 3 and the file memory 3.

Here, the line corresponding section 1-t-i- has n-sided buffer memories 2-1 to 2-n, respectively, and sequentially buffers data to the common buffer memory 5 or the line al''.
Transfer to any terminal connected to a+*.

Let us now consider the case where data is transferred from the single-line correspondence section 1-1 to the file memory 3. When the common buffer memory 5 has free space, the transfer request from the line correspondence section 1-1 is immediately accepted by the common buffer memory 5. When the common buffer memory 5 is full, a wait occurs in the buffer memories 2-1 to 2-n of the line handling section 1-1. In this state, there is a possibility that an overflow/amplifier flow probability will occur as in the conventional system.

FIG. 3 shows the terminal communication speed Tv for the conventional method and the present invention, with the overflow/amplifier flow probability constant.
3 shows the relationship between the transfer capacity Fd and the transfer capacity Fd of the file memory 3, where I is the characteristic curve of the method of the present invention and ■ is the characteristic curve of the conventional method.

It can be seen from the above characteristic curve I that the present invention has a high transfer capacity for high-speed terminals. Therefore, for high-speed terminals, the storage area can be used effectively and it is economical. This is to smooth out the peak traffic of high-speed terminals using the common buffer memory 5. Further, although the conventional method has a limit on the communication speed of terminals that can be accommodated in the system, the method of the present invention has no limit.

Figure 4 shows the transfer capacity characteristics when accommodating terminals with different communication speeds, where α is the ratio of communication traffic of high-speed terminals to total communication traffic + Fd is In terms of transfer capacity, 1 indicates the characteristic curve of the method of the present invention, and ■ indicates the characteristic curve of the conventional method. It can be seen that the method of the present invention has smaller fluctuations in the transfer capacity Fd with respect to the ratio α than the conventional method. In other words, in system design, the conventional method requires redundant design due to large fluctuation rate, whereas the method of the present invention requires redundant design to accommodate fluctuations in the communication traffic ratio of terminals with different communication speeds. It is economical as there is no problem.

(Effects of the Invention) As explained above, the present invention provides a common buffer memory between the line handling section and the file memory in a storage type communication processing device, smoothes peak traffic of high-speed terminals, This has the great advantage of making full use of the memory's transfer ability and making effective use of the system.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of a conventional storage type communication processing device, FIG. 2 is a block diagram of an embodiment showing the configuration of the present invention, and FIG.
4 and 4 are diagrams showing the transfer capacity characteristics of the conventional system and the present invention. ■-1~I-m...Line support section, 2-1~2-n...
・Buffer memory, 3... File memory,
4 central control unit, 5... common buffer memory, a]
~am A line.

Claims (1)

[Claims] It has a file memory for accumulating data, and a plurality of line support units that sequentially buffer data from a terminal and transfer it to the file memory, or receive data from the file memory and output it to the terminal. In a communication processing device that performs storage and communication processing, a common buffer memory is provided between the line corresponding section and the file memory, and data input from a terminal to the line corresponding section is temporarily stored in the common buffer memory. and when outputting the data in the file memory to the terminal, the data in the file memory is read into the common buffer memory and then transferred to the line corresponding section. An intermediate buffering method for communication processing systems.