JPH0834482B2 - Inter-station data transfer control method - Google Patents

Description

The present invention relates to an inter-station data transfer control system for performing large-volume data transfer between stations connected by a plurality of transmission lines.

[Conventional technology]

As shown in the block diagram of FIG. 5, the conventional inter-station data transfer control system uses transmission buffers e and f provided at one end of a plurality of transmission lines c and d that connect devices a and b provided at each station. , g, h
And the receiving buffers i, j, k, l provided at the other end to the devices a, b
Is controlled directly, it receives the free / closed information m, n of the send buffers e, f, g, h and monitors the free / closed state.
Select an empty send buffer and perform the data send process. Similarly, the receive buffer i, j, k, l free / closed information p, q
Was received, the vacancy / blockage was monitored, and the reception buffer having the reception data was selected to perform the data reception processing.

[Problems to be Solved by the Invention]

In the above-described conventional inter-station data transfer control method, the device provided in each station individually monitors the open / closed state of the transmission buffer and the reception buffer provided at both ends of the plurality of transmission lines, and therefore the device control is controlled. Since it becomes complicated, the processing speed must be increased and the device becomes effective.

An object of the present invention is to provide a switch unit for monitoring and selecting the empty / closed state of the transmission buffer and the reception buffer outside the device to simplify the control of the device and reduce the processing speed in the device. It is to provide an inter-station data transfer control method that can be economically efficient.

[Means for solving the problem]

The inter-station data transfer control method of the present invention is an inter-station data transfer control method for a system in which devices provided for each station are connected by a plurality of transmission lines to transfer data. A transmission buffer for accumulating data, a reception buffer for accumulating data to be received at the other end, a transmission monitoring unit for monitoring the availability / blockage of the transmission buffer and notifying the device whether or not the transmission buffer is free, Monitoring the presence / absence of received data in the reception switch and a transmission switch unit that connects one empty transmission buffer to the device based on transmission switch control information transmitted by the transmission monitoring unit provided between the transmission buffer and the device A reception monitoring unit that notifies the device of the presence or absence of a reception buffer having received data, and the reception monitoring unit provided between the plurality of reception buffers and the device. A configuration having a reception switch section for connecting the receiving buffer with one of the received data to the device by the reception switch control information to be sent.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

 FIG. 1 is a block diagram of an embodiment of the present invention.

The devices 1 and 2 provided in each station are connected by a plurality of transmission lines 3 and 4. Transmission buffers 5, 6, 7, 8 for accumulating data to be transmitted are provided at both ends of a plurality of transmission lines 3, 4 for data transmission,
Reception buffers 9, 10, 11, 12 for accumulating received data are provided. The transmission monitoring units 17, 18 are transmission buffers 5, 6, 7, 8,
It monitors the vacancy / blockage information 13 and 14 of each device and sets transmission buffers 5 and 7 or transmission buffers 6 and 8 to devices 1 and 2 as a set, and if at least one transmission buffer is vacant in each set, it becomes empty. The transmission buffer status information 15, 16 is notified as. Switch 19,
20, 21, 22 connect the transmission buffers 5, 6, 7, 8 with the devices 1, 2. The switches 19 and 21 configure a transmission switch unit 25, which receives the transmission switch control information 23 from the transmission monitoring unit 17 and connects one transmission buffer, and then this transmission buffer receives the connection next. One empty transmission buffer is always selected and connected to the device 1 under the logic of the lowest rank with respect to the other transmission buffers. The transmission switch unit 26 including the switches 20 and 22 also performs the same operation. Reception monitoring unit 27,3
2 is empty / closed information of receiving buffers 9,10,11,12 27,28
The reception buffers 9 and 11 or the reception buffers 10 and 12 are set in the devices 1 and 2 as a set, and if at least one reception buffer is blocked in each set, it is determined that the reception data exists and the reception buffer status information is displayed. Notify 29,30. Switch 33,34,35,36
Connects the receiving buffers 9, 10, 11, 12 and the devices 1, 2.
The switches 33 and 35 form a reception switch unit 39, and after receiving the reception switch control information 37 from the reception monitoring unit 31 and connecting one reception buffer, the order in which this reception buffer receives the next connection. Always selects a receiving buffer having one received data under the lowest logic with respect to other receiving buffers and connects it to the device 1. The reception switch section 40 composed of the switches 34 and 36 also performs the same operation.

 Next, the operation will be described.

 FIG. 2 is a flow chart of the operation of the device.

In the operation of the apparatus, it is determined that there is transmission data (step 100), and when it is determined that the transmission buffer is empty (step 101), transmission processing to the transmission buffer (step 102) is performed. When it is determined in step 100 that there is no transmission data, when it is determined in step 101 that there is no space in the transmission buffer, and when the transmission processing to the transmission buffer is completed in step 102, next, there is reception data The determination process (step 103) is performed. If it is determined in step 103 that there is received data, reception processing from the reception buffer (step 104) is performed. When it is determined in step 103 that there is no received data, and when the reception process from the reception buffer is completed in step 104, the process jumps to step 100 to proceed to the transmission data determination process. After that, the above operation is repeated.

FIG. 3 is a flow chart of the operation of the transmission monitoring unit and the transmission step unit.

The transmission monitoring unit monitors the transmission buffer vacancy / blockage information and determines that the transmission buffer is vacant (step 20
0), send switch control information to the send switch section. The transmission switch unit receives the transmission switch control information and connects the switch (step 201). The transmission monitoring unit notifies the device of the transmission buffer status information (step 20).
2). The transmission monitoring unit monitors the end of data transfer processing between the device and the transmission buffer (step 203), and when it determines that the transfer has ended, sends the transmission switch control information to the transmission switch unit. The transmission switch unit disconnects the switch (step 204). When it is determined that the transmission buffer is full in step 200 and when the switch disconnection process is completed in step 204, the selection order of the transmission buffer is set to the lowest (205 step), the next transmission buffer is set to the highest priority, and the same processing is performed. repeat.

FIG. 4 is a flow chart of the operation of the reception monitoring unit and the reception switch unit.

The reception monitoring unit monitors the free / closed information of the reception buffer and determines that the reception buffer is full (step 30).
1), Send the receiving switch control information to the receiving switch section. The reception switch unit receives the reception switch control information and connects the switches (step 301). The reception monitoring unit notifies the device of the reception buffer status information (step
302). The reception monitoring unit monitors the end of the data transfer process between the reception buffer and the device (step 203), and when it determines that the transfer has ended, sends the reception switch control information to the reception switch unit. The reception switch unit disconnects the switch (step 304). When it is determined in step 300 that the receiving buffer is empty and when the switch disconnection process is completed in step 304, the selection order of the receiving buffer that has completed this process is the lowest (step 305), and the next receiving buffer is the highest priority. The same process is repeated.

〔The invention's effect〕

As described above, according to the present invention, a switch and a monitoring unit are provided between the transmission buffer and the reception buffer at the ends of a plurality of transmission lines and the device, and the management of the plurality of transmission buffers and the reception buffer is omitted from the function of the device. By simplifying the management of the transmission buffer and the reception buffer of the device, simplifying the control of the device, and lowering the processing speed in the device, it is possible to measure the cost of the device.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a flow chart of operation of an apparatus in one embodiment, and FIG. 3 is a flow chart of operation of a transmission monitor unit and a transmission switch unit in one embodiment,
FIG. 4 is a flow chart of the operation of the reception monitor section and the reception switch section in one embodiment, and FIG. 5 is a block diagram of a conventional inter-station data transfer control system. 1,2 ... Device, 3,4 ... Transmission path, 5,6,7,8 ... Transmission buffer,
9,10,11,12 ... Reception buffer, 13,14 ... Transmission buffer free / closed information, 15,16 ... Transmission buffer status information, 17,18
… Transmission monitoring unit, 19,20,21,22… Switch, 23,24… Transmission switch control information, 25,26… Transmission switch unit, 27,28… Reception buffer empty / closed information, 29,30… Reception buffer Status information, 31, 32 ... Reception monitoring unit, 33,34,35,36 ... Switch,
37,38 ... Reception switch control information, 39,40 ... Reception switch section, a, b ... device, c, d ... transmission path, e, f, g, h ... transmission buffer, i, j, k, l ... reception Buffer, m, n ... Transmit buffer free / full information, p, q ... Receive buffer free / full information.

Claims (1)

[Claims] 1. A transmission buffer for accumulating data to be transmitted at one end of the transmission line in an inter-station data transfer control method of a system for connecting devices provided for each station by a plurality of transmission lines to transfer data. At the other end, a receiving buffer for accumulating data to be received, a transmission monitoring unit for monitoring the availability / blockage of the transmission buffer and notifying the device of the availability of the transmission buffer, a plurality of the transmission buffers and the A transmission switch unit that connects one empty transmission buffer to the device according to the transmission switch control information transmitted by the transmission monitoring unit provided between the device and the reception data in the reception buffer is monitored and received by the device. A reception monitoring unit that notifies the presence / absence of a reception buffer having data, and a reception switching unit that transmits the reception monitoring unit provided between the plurality of reception buffers and the device. Interoffice data transfer control method characterized by having a reception switch section for connecting the receiving buffer with one of the received data to the device by the control information.