JPS63232659A - Data processing method in duplex transmission processing equipment - Google Patents

Abstract

PURPOSE:To improve the processing speed of duplicated transmission processors and, at the same time, to prevent occurrence of serious troubles, such as system down, etc., of the processors, by temporarily causing each of the transmission processors to work as a non-duplex transmission processor and take partial charge of data processing when input data to the duplex transmission processors become excessive. CONSTITUTION:If the quantity of reception from terminals increases and exceeds the processing capacity of the data processor 341 of the transmission processor 31 of System-A, overload information is sent to a control processor 331. When the control processor 331 sends a reception switching commanding signal to the control processor 332 of the transmission processor 32 of System-B upon receiving the overload information, a receiving circuit switch 2 is switched simultaneously with the commencement of the next frame so that the receiving data from receiving lines 11, 12,...1n can be inputted to the transmission processor 32 of System-B from the beginning of the next frame. Thereafter, the processor 32 of System-B continues the process as the processor of a currently used system and, when the quantity of unprocessed data accumulated in a reception buffer 312 exceeds a prefixed quantity, the process is switched to the transmission processor 31 of System-A.

Description

[Detailed Description of the Invention] [Summary] In a duplex transmission processing device, when the human data exceeds the processing capacity of the active transmission processing device, input data is transferred to the standby transmission processing device. The data is input and processed, and when the transmission from the active transmission processing device is completed, the data processed by the standby transmission processing device is sent to the output line.

[Industrial application field]

A duplex transmission processing device that receives data cyclically transmitted from multiple data input devices or telemeter terminals, edits the data into frames, etc., and transfers the data to a subsequent device such as a host processor. Regarding.

[Conventional technology]

FIG. 5 shows a conventional example of the duplex transmission processing device as described above, in which inputs from input lines 511 to 51n from a large number of terminals are connected to input switching switches 521 to 52n.
The transmission processing device 531 is configured so that it can be switched to the active transmission processing device 531 or the standby transmission processing device 532 for manual input, and the outputs from these transmission processing devices are also selected by the output selector switch 54 and routed to the output line. 55.

In a normal state, all data from the input line 51 is input to the active transmission processing device 531 by the reception line switching device 52, and after being processed by this transmission processing device, the data is transferred to the transmission line switching device 54. The data is transferred to the subsequent device from the output line 55 connected to the transmission processing device.

If an abnormality occurs in the processing due to a failure of the transmission processing device 531, the reception line switch 52 and the transmission line switch 54 are switched in conjunction, and the data from the input line 51 is manually transferred to the standby transmission processing device 532. The data is then processed by a standby processing device 532, and the output of this processing device 532 is switched by a transmission line switch 54 and output to an output line 55.

[Problem that the invention seeks to solve]

In the conventional single transmission processing apparatus as described above, data processing is not switched to the standby system unless the active transmission processing apparatus is intentionally switched or an abnormal condition occurs.

Therefore, if the data terminals are used for remote measurement of a power plant, sudden changes in the measured values of many terminals due to thunderstorms or heavy rain may reduce the amount of data transmitted from each terminal. The amount of data has increased significantly, exceeding the processing capacity of the current transmission processing device, and it may take a long time to transfer the manually-generated data, or in extreme cases, the system may go down.

In order to avoid such a situation, the processing capacity of the transmission processing device should be made large enough to adapt to this peak state. Therefore, it is not practical.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the conventional duplex transmission processing apparatus as described above, and to provide a duplex transmission processing apparatus that can perform stable processing even when the amount of input data increases rapidly.

[Means for solving problems]

As shown in the principle diagram in FIG. The reception line switching devices 21 to 2n switch the input data to the standby transmission processing device 32, thereby causing the standby transmission processing device 32 to manually process the input data. When the transmission is completed, the transmission line switch 4 is switched to send the data processed by the standby transmission processing device to the transmission line 5.

[For production]

Input data is supplied from a large number of reception lines 11 , 12 , 1n to the active transmission processing device 31 via a reception line switch 2 that is provided corresponding to each line and includes switch elements that are switched in conjunction with each other. Ru.

When the amount of this input data increases and exceeds the processing capacity of this transmission processing device 31, for example, a certain amount of received data accumulates in a reception buffer provided on the input side of this processing device,
The transmission processing device 31 switches the receiving line switch 2 to input received data to the standby transmission processing device 32 so that the processing device 32 processes the received data.

When the transmission of the data processed by the active transmission processing device 31 is completed, the transmission line switch 4 is switched so that the data processed by the standby transmission processing device 32 is sent to the transmission line 5.

That is, in a duplex transmission processing device, when the input data exceeds the processing capacity of the active transmission processing device, the present invention processes the input data by using the active and standby transmission processing devices as a single system. In addition, the data processed in the standby transmission processing device is transmitted to the output line after the transmission of data from the active transmission processing device is completed.

〔Example〕

FIG. 2 shows an embodiment of the present invention, and components corresponding to those in FIG. 1 are given the same numbers.

The transmission processing devices 31 and 32 have the same configuration, and in this embodiment, as explained below, they operate alternately when the amount of received data increases, so the expressions "active system" and "protection system" are inappropriate. , A-system transmission processing device 31 and B-system transmission processing device 32.

Each terminal is assigned a predetermined time slot, so that the receiving lines 1□, 1゜,
The terminal that sent the data received from ln can be identified by the time slot received by the transmission processing device 3, and the transmission processing device 3 processes such received data using a frame synchronization system as shown in FIG. No.Syn
, channel number CH#, and data, and sends the edited signal to a downstream device such as a host processor via the transmission line 5.

When the amount of reception from these terminals increases and exceeds the processing capacity of the data processing device 341 of the A-system transmission processing device 31 that was in the receiving state as shown in FIG. As shown, unprocessed received data begins to accumulate in the reception buffer 311, and when the data amount detector 321 detects that a predetermined amount of data, such as for several frames, has accumulated, it sends overload information to the control processor 331. .

The control processor 331 that received this overload information
When the reception switching command signal shown in FIG. The received data is input to the B-system transmission processing device 32 from the beginning of the next frame.

As a result, the B-system transmission processing device 32 is configured as shown in FIG. 4(a).
′, reception is started, and the received data is transferred from the reception buffer 31° to the data processing device 342 and processed. It is only stored in a buffer, etc., but is not sent out yet.

When the processing and transmission of the data remaining in the reception buffer 311 in the A-system transmission processing device 31 is completed, the control processor 331 in this transmission processing device 31 transmits the transmission switching command signal shown in FIG. 4(e) to the B-system transmission processing device 31. The signal is sent to the control processor 332 of the transmission processing device 32, and the transmission line switch 4 is switched. A control signal outputted from the B-system control processor 332 in response to this command signal causes the data processing device 342 to send data as shown in FIG. 3 to the transmission line 5 via the transmission line switch 4. It goes without saying that the transmission switching at this time is performed during the frame separation period shown in FIG. 3.

In this way, once the B-system transmission processing device 32 starts processing, the B-system transmission processing device 32 continues processing as the active transmission processing device, and the reception buffer of this B-system transmission processing device 312, when unprocessed received data accumulates on a predetermined misplaced area, the processing is switched to the A-system transmission processing device 31 through a process similar to the above-described switching from the A-system to the B-system, and the process is transferred to the A-system transmission processing device 31. Shown on the right side of the figure.

〔Effect of the invention〕

According to the present invention, when the amount of manually input data to the redundant transmission processing device becomes excessive, these transmission processing devices are temporarily turned into a single system, and the received data is manually transferred to the standby transmission processing device to process the data. Since the processes can be shared, it is possible to not only improve the processing speed but also to achieve the special effect of preventing serious accidents such as system failure.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing an embodiment of the present invention, FIG. 3 is a diagram showing a frame structure of a transmission signal in accordance with the embodiment of FIG. 2, and FIG. A time chart showing the operation of the embodiment shown in FIG. 2, and FIG. 5 a diagram showing an example of a conventional duplex transmission processing device. 111121... 1n... Receiving line, 2...
Receiving line switching device, 31... Active transmission processing device, 32
... Standby transmission processing device, 4... Transmission line switching device,
5... Transmission line. Figure 1〒-q=-? Jll I,! 21111-7rem1-jiko4+tsu1h'+Aroflameohρ (Fig. 3

Claims (1)

[Claims] In the redundant transmission processing equipment, the active transmission processing equipment (3
Receiving line (1_1, 1_2......1n) in _1)
) is overloaded, the input data is switched by the receiving line switch (2) and input to the standby transmission processing device (3_2), thereby processing a part of the input data. is assigned to this standby transmission processing device, and when the transmission of the data processed in the active transmission processing device is completed, the transmission line switch (4) is switched, and the processing is completed in this standby transmission processing device. A data processing method in a duplex transmission processing device, characterized in that data is sent to a transmission line (5).