JPH04355854A - Data transfer system - Google Patents

Abstract

PURPOSE:To continue the communication by another optical fiber cable free from trouble at the time of the occurrence of trouble in one optical fiber cable by providing plural optical fiber cables and sharing one optical fiber cable among plural channels. CONSTITUTION:Data sent to transmission circuits 4091 and 4092 is transferred to reception circuits 5051 and 5052 of a remote channel controller 500 through an optical fiber cable 700. Plural transfer paths a1, a2, b1, and b2 are provided between the controller 500 and an input/output controller 400. Consequently, a transfer line where trouble occurs is switched to continue the communication.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a data transfer method for a remote channel device connected to a central processing unit by an optical fiber cable, and more particularly to a data transfer method for a plurality of remote channel devices by sharing a plurality of optical fiber cables. Regarding.

0002

2. Description of the Related Art FIG. 3 is an overall block diagram of a conventional data transfer system, in which 100 is a central processing unit, 200 is a main storage device, 300 is a transfer control device, 400 is an input/output control device, and 500 is a remote channel control device. device, 600 is a remote channel device, 700 is a remote channel control device 5
00 and the input/output control device 400.

FIG. 4 is a detailed block diagram of a conventional data transfer system, in which input/output control devices 400 and 406 are data receiving circuits from the main device, and 407 is a channel number adding circuit (channel number adding circuit) that adds a channel number to each frame. 409 is a transmission circuit to the remote channel 600, 401 is a transmission circuit to the main device, 402 is a channel number analysis circuit (channel number analysis means), 404 is a reception circuit from the remote channel 600 side, 405 is a reception circuit from the remote channel 600 side. A data control circuit, 700 is an optical fiber cable for data communication, 500 is a remote channel control device, 504 is a data receiving circuit from the remote channel device 600, 503
501 is the channel number addition circuit, and 501 is the input/output control device 40.
0, 505 is a receiving circuit from the input/output control device 400, 507 is a channel number analysis circuit, and 508 is a transmitting circuit to the remote channel device 600.

[0004] Next, the operation will be explained.

[0005] The input/output control device 400 is transferred from the central processing unit 100 and the main storage device 200 via the transfer control device 300.
The data sent to is received by the data receiving circuit 406,
A data control circuit 405 determines a remote channel device as a transfer destination, and a channel number adding circuit 407 adds a channel number to each frame.

[0006] This data is received by a receiving circuit 505 via a transmitting circuit 409 and an optical fiber cable 700, and is passed to a remote channel control device 500. The channel number analysis circuit 507 analyzes the channel number added to each frame, selects the route to the remote channel device 600 of the transfer destination in the transmission circuit 508, and transfers the signal.

Transfer data from the remote channel device 600 is received by the receiving circuit 504 of the remote channel control device 500, assigned the number of the remote channel device by the channel number adding circuit, and sent to the transmitting circuit 501 and the optical fiber cable. 700 and is received by the receiving circuit 404 of the input control device 400, and the channel number analyzing circuit 4
At step 02, the channel number is analyzed and transferred to the main device via the transmitting circuit 401. The above conventional example is a patent application pending in May 1990 (application serial number 62271258).

[0008]

[Problems to be Solved by the Invention] In the data transfer method according to the prior art described above, when a failure occurs in a shared optical fiber cable, the input/output control device connected to the optical fiber cable and multiple remote channels There was a problem in that the device was unable to transfer data. The present invention has been made to solve the above problems, and its purpose is to share data by sharing an optical fiber cable with multiple channels so that even if one optical fiber becomes unusable due to a failure, communication can continue using other optical fiber cables. The purpose is to provide a transfer method.

[0009]

[Means for Solving the Problems] The data transfer method of the first invention provides a plurality of remote channels controlled by a remote channel control device that accesses a central processing unit and a main storage device via an input/output control device. In a data processing system having a device, a channel number adding means adds a channel number to each frame to be transferred when data is transferred from the input/output control device to the remote channel control device, the input/output control device and the remote channel. Transfer path switching means for selecting one of a plurality of transfer paths to the control device and transferring data; data receiving means for receiving data transferred to the remote channel control device; and the data receiving means. fault detection means for detecting a fault in a transfer path from data received by the controller and notifying the input/output control device of the faulty transfer path; and a channel added to the frame by the channel number adding means from the received data. channel number analysis means for detecting a number, selecting one remote channel device among a plurality of remote channel devices, and transmitting the received frame; The apparatus further comprises reporting means for receiving information on a fault in a transfer path between the output control device and the remote channel control device and instructing the transfer path switching means.

[0010] The data transfer method of the second invention is a data processing system in which a remote channel control device selects one remote channel device from transfer requests from a plurality of remote channel devices, and transfers the selected remote channel in units of frames to be transferred. channel number adding means for adding a channel number of the device; transfer path switching means for selecting one of a plurality of transfer paths between the remote channel control device and the input/output control device to transfer data;
data receiving means for receiving data transferred to the input/output control device corresponding to the plurality of transfer paths; and detecting a fault in the transfer path from the data received by the data receiving means, and detecting a transfer in which the fault has been detected. fault detection means for notifying the remote channel control device of a fault in the transfer path between the remote channel control device and the input/output control device, which is notified to the remote channel control device; A data transfer system comprising a reporting means for instructing a path switching means, and a channel number analyzing means for analyzing and recognizing the channel number added by the channel number adding means and transferring data.

[0011]

[Operation] In the data transfer method of the present invention, the channel number adding means adds a channel number to the data to be transferred from the central processing unit and the main storage device to the remote channel device in units of frames, and the transfer path switching means The fault detection means of the remote channel control device which selects one of the transfer paths to transfer data and receive the data detects a fault in the transfer path and notifies the transfer path switching means via the notification means to switch the transfer path. The channel number analysis means detects the channel number added to the frame and sends the data to the corresponding remote channel device, so that communication can be continued by switching the faulty transmission path.

[0012] When each remote channel device accesses the central processing unit or main storage device, the channel number addition means adds the channel number to a transfer request from the remote channel device and forwards the request, and the failure detection means Detects a fault in the transfer path, notifies the transfer path switching means of the remote channel device, switches the transfer path and transfers the data, and the channel number analysis device analyzes the channel number, recognizes the remote channel device, and transfers the data to the central processing unit. Since the data is transferred to the main storage device, communication can be continued by switching the failed transfer path.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall block diagram of the data transfer system of the first and second inventions, in which a1 and a2 indicate multiple data transfer paths from the remote channel control device 500 to the input/output control device 400, and a3 is a transfer path for transfer path failure information from the input/output control device 400. b
1, b2 indicate multiple paths for transferring data from the input/output control device 400 to the remote channel control device 500, b3 indicates the transfer path from the remote channel control device 500 for fault information on the transfer path, and other symbols are conventional Since this is the same as the example, the explanation will be omitted.

FIG. 2 is a detailed block diagram of the data transfer system according to the first and second aspects of the present invention.

In FIG. 2, 406 is a data receiving circuit (channel number adding means) from the main device side, 405 is a data control circuit (channel number adding means) that recognizes the data transfer destination remote channel device, and 407 is a frame to be transferred. A channel number adding circuit (channel number adding means) that adds a channel number to a unit; 408 a transfer path switching circuit (transfer path switching means) that selects one of a plurality of transfer paths; 409(1), 409(2) is the selected transmission circuit (transfer path switching means), 505 (1), 505
(2) is a data receiving circuit (data receiving means) of the remote channel control device 500; 506 is a fault detection circuit (fault detection means) that detects a fault in the transfer path from the received data and notifies the input/output control device 400; , 507 is a channel number analysis circuit (channel number analysis means) that detects the channel number added to the frame and sends out the received frame, and 508 (1) and 508 (2) are data transmission circuits for each remote channel device 600. (channel number analysis means); 510 is a transmission circuit (notification means) for transmitting fault information of the fault detection circuit 506 to the input/output control device 400;
411 receives this fault information and transfers the transfer path switching circuit 4.
This is a receiving circuit (notification means) that instructs 08.

Next, the operation of the first invention will be explained.

Data sent from the central processing unit 100 and the main storage device 200 to the input/output control device selection device 400 via the transfer control device 300 is received by the receiving circuit 406. The data received by the receiving circuit 406 is transferred to the data control circuit 405 which has recognized the remote channel device to which it is transferred.
Accordingly, a channel number is added to each frame by the channel number adding circuit 407. Channel number addition circuit 407
The data to which the channel number has been added is selected by the transfer path switching circuit 408 and transferred to one of the transmitting circuits 4091 and 4092. Transmission circuit 4091 ・4
092 The data sent to optical fiber cable 700
The signals are transferred to the receiving circuits 5051 and 5052 of the remote channel control device 500 via. Receiving circuit 505
1 ・The data from 5052 is sent to the failure detection circuit 506.
sent to. The failure detection circuit 506 is connected to the receiving circuit 5051.
- Select one of the data from 5052 to check whether there is a fault on the transfer path, and if a fault is found on the transfer path, the fault information for that transfer path is sent from the transmitting circuit 510 via the receiving circuit 411. Instructs the transfer path switching circuit 408, and if no failure is recognized, the channel number analysis circuit 5
Data is transferred to 09. The data sent from the failure detection circuit 506 is sent to the transmission circuit 508 by the channel number analysis circuit 509 based on the channel number added to each frame.
1. Select one of the 5082 that will be the route to the destination remote channel device and transfer it. The transmitting circuits 5081 and 5082 that have received the data transfer it to the remote channel devices 6001 and 6002.

The second invention will be explained.

In FIG. 2, 504(1), 504(
2) is a receiving circuit (channel number adding means) for transfer data from the remote channel device 600 (1, 2);
3 is the selected remote channel device 600 (1, 2)
502 is a channel number adding circuit (channel number adding means) that adds a channel number to each data frame, and 502 is a transfer path switching circuit (transfer path switching circuit) that selects a plurality of transfer paths to the input/output control device 400 and transfers data. means)
, 501(1), 501(2) are switching transmission circuits (transfer path switching means), 404(1), 40
4(2) is a data receiving circuit (data receiving means) on the input/output control device side, 403 is a fault detection circuit (fault detection means) that detects a fault in the transfer path and notifies the remote channel control device, and 402 is a channel number. A channel number analysis circuit (channel number analysis means) that analyzes the number added by the additional circuit 503 and recognizes it in the data control circuit 405 (channel number analysis means); 401 is a data transmission circuit (
(channel number analysis means), 410 is a failure detection circuit 403
509 is a receiving circuit (notifying means) that receives the fault information and instructs the transfer switching circuit 502 to receive the fault information.

Next, the operation of the second invention will be explained.

Remote channel device 6001/600
Transfer data from 2 to remote channel control device 50
Data is received by the receiving circuits 5041 and 5042 of 0. One of the data received by the receiving circuits 5041 and 5042 is assigned a channel number of a remote channel device that is a transfer source for each frame by a channel number adding circuit 503. The data to which a channel number has been added by the channel number addition circuit 503 is sent to the transmission circuits 5011 and 5012 by the transfer path switching circuit 502.
One of them is selected and transferred. Transmission circuit 5011
・The data sent to 5012 is sent to the receiving circuit 4041 of the input/output control device 400 via the optical fiber cable.
・Transferred to 4042. Receiving circuit 4041 ・40
42 is sent to a fault detection circuit 403. The failure detection circuit 403 includes reception circuits 4041 and 404.
2 is selected to check whether there is a fault on the transfer path, and if a fault is detected, the fault information for that transfer path is sent from the transmitting circuit 410 to the receiving circuit 509.
The data is transferred to the channel number analysis circuit 402 if no failure is detected. The data sent from the fault detection circuit 403 is sent to the channel number analysis circuit 402 based on the channel number added to each frame, which reports the remote channel device of the transfer source to the data control circuit 405 and sends the data to the transmission circuit 40.
Send to 1. The data sent by the transmission circuit 401 is transferred to the central processing unit 100 and the main storage device 200 via the transfer control device 300 by the data control circuit 405 which has recognized the remote channel device of the transfer source.

[0023]

Effects of the Invention As is clear from the above description, according to the data transfer device of the present invention, a channel number is added to each frame for data transfer from an input/output control device to a remote channel control device, and optical By providing multiple fiber cables, one optical fiber cable can be shared by multiple channels, and even if a failure occurs in one optical fiber cable, communication can be continued using other optical fiber cables that are free of failure.

[0024] Furthermore, for data transfer from a remote channel control device to an input/output control device, by adding a channel number to each frame and providing multiple optical fiber cables, one optical fiber cable can be used for multiple channels. They can be shared, and even if a failure occurs in one optical fiber cable, communication can continue using other optical fiber cables that are free of failure. There is an effect called.

[Brief explanation of drawings]

FIG. 1 is an overall block diagram of a data transfer system of the present invention.

FIG. 2 is a detailed block diagram of the data transfer method of the present invention.

FIG. 3 is an overall block diagram of a conventional data transfer method.

FIG. 4 is a detailed block diagram of a conventional data transfer method.

[Explanation of symbols]

100...Central control unit, 200...Main storage device, 300...
Transfer control device, 400... Input/output control device, 401... Transmission circuit, 402... Channel number analysis circuit, 403... Fault detection circuit, 404... Receiving circuit, 405... Data control unit, 4
06...Reception circuit, 407...Channel number addition circuit, 40
8... Transfer path switching circuit, 409... Transmission circuit, 410...
Transmission circuit, 411...Reception circuit, 500...Remote channel control device, 501...Transmission circuit, 502...Transfer data switching circuit, 503...Channel number addition circuit, 504...
Receiving circuit, 505... Receiving circuit, 506... Fault detection circuit,
507...Channel number analysis circuit, 508...Transmission circuit, 5
09... Receiving circuit, 510... Transmitting circuit, 600... Remote channel device, 700... Optical fiber cable.

Claims (2)

[Claims] Claim 1: In a data processing system having a plurality of remote channel devices in which a central processing unit and a main storage device are accessed via an input/output control device, the plurality of remote channel devices are controlled from the input/output control device. Channel number adding means for adding a channel number to each frame to be transferred when data is transferred to a remote channel control device; and one of a plurality of transfer paths between the input/output control device and the remote channel control device. a transfer path switching means for selecting one and transferring data; a data receiving means for receiving data to be transferred to the remote channel control device; failure detection means for notifying the input/output control device of the recognized transfer path of the frame; detecting a channel number added to the frame by the channel number addition means from the received data; channel number analysis means that selects one remote channel device and sends the received frame; and transfer between the input/output control device and the remote channel control device, which is notified to the input/output control device by the fault detection means. and reporting means for receiving information on a road failure and instructing the transfer route switching means. 2. A data processing system having a remote channel device that accesses a central processing unit and a main storage device via an input/output control device, wherein a plurality of remote channel devices that control a plurality of remote channel devices are connected to the remote channel control device. channel number adding means for selecting one remote channel device from a transfer request from a channel device and adding a channel number of the selected remote channel device to each frame to be transferred; the remote channel control device; and the input/output control device; transfer path switching means for selecting one of the plurality of transfer paths between them and transferring the data; and data receiving means for receiving data transferred to the input/output control device corresponding to the plurality of transfer paths. a fault detecting means for detecting a fault in a transfer path from the data received by the data receiving means and notifying the remote channel control device of the faulty transfer path; a reporting means that receives information on a failure in the transfer path between the remote channel control device and the input/output control device and instructs the transfer path switching means; and a reporting device that analyzes the channel number added by the channel number addition device and adds data A data transfer method that includes channel number analysis means that is recognized by a control device and transferred data.