JPS62175048A - Loop bus control system - Google Patents

Abstract

PURPOSE:To form a decentralized type packet data processing device with a high reliability by constituting the problem in the continuity of a software processing apt to the control from an external part and the problem of the recovering time after a change-over by the logic of a hardware only and holding the certainty. CONSTITUTION:When a present-use communication is interrupted by some trouble, '0' system and '1' system loops are in operation independently, and therefore, in order to prevent the abnormality of a packet transmitting receiving processing by the change-over, a system control module 10 stops the packet communication of both systems. A control packet A to command the present-use type change of a loop bus controller from a system control module 12 is sent individually or by the multiple address mode to a loop bus controller 23 in a data processing module 20. The loop bus controller 23stops temporarily the data processing of data processing parts 22 and 24, changes over the confounding, connects a data processing part 22 and own part and thereafter, resumes the data processing of the data processing parts 22 and 24. The processing of the loop bus controller 23 is executed by a hardware sequence circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a distributed packet data processing device having a loop-shaped transmission path, and particularly to a control method for a loop bus.

[Conventional technology]

Conventionally, in this type of distributed packet data processing device, when a factor that causes a change in the active system and the standby system occurs, when each data processing module autonomously performs the change, or when the system management module In some cases, the software of each data processing module is notified of the change, and switching is performed under software control.

[Problem that the invention seeks to solve]

In the conventional method described above, when each module makes changes autonomously, a long timer is required to ensure the timing from when the cause of the change is detected to when the change process is completed in the entire system, resulting in system slowdown. There is a problem that processing interruption time becomes long.

In addition, when the system management module notifies the liftware of each processing module of changes, if the cause of the system configuration change was a momentary power outage, the memory contents may have been destroyed, and the software If a runaway occurs in some processing modules, there is a problem that the change processing itself will not work properly, or that the system management module will not be able to determine what kind of system configuration will be adopted in that state. .

[Failure to solve the problem]

In the distributed packet data processing device of the present invention, the system management module has a function of stopping or restarting packet communication within the loop, and at least a function of the loop bus controller section or the data processing section for the data processing module. The function of instructing changes to the active system and standby system using the control bucket) A and the loop bus controller section in the data processing module are ,
A function for switching between the active system and the standby system for at least one of the data processing units, a function for notifying change details to the mate system loop bus controller unit, and a function for stopping and restarting software processing for the data processing unit and the mate system data processing unit. It has a configuration method in which it is configured using hardware logic.

〔Example〕

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

FIG. 1 is a system configuration diagram showing an embodiment of the present invention. 10 is a system management module, which includes system management module 0 of 11 and system management module 1 of 12.
It is duplicated by

Reference numeral 20 denotes a data processing module 1, which also includes a data processing unit 22 with a duplex Saleloop bus controller 21, and a roof lotus controller 23.1! It is composed of a near-evening processing section 24. The loop bus controller 21, 23 and the data processing units 22, 24 have a linkage that can be connected alternately. Reference numeral 30 denotes a data processing module n, which has exactly the same configuration as the data processing module 1 of 20, so its explanation will be omitted. System management module 10
and data processing module 20. Data processing module 3
0 are organically connected through transmission paths in opposite directions to form a system. In order to change the system configuration of this system, when a loop failure occurs, the loop bus controllers 21, 23, 31.33, which are fixedly connected to the loop, are divided into 0 system, 1 system each into an active system, and a standby system. When the data processing units 22, 24, and 32 are changed all at once as one system,
, 34 may be changed depending on individual failures.

First, a case where the active system of the loop is changed all at once will be explained. In the data processing module 20, the loop bus controller 21 and the data processing section 22 are connected as an active system, and the loop pathco/draw 223 and data processing section 24 are connected as a standby system. Bus controller 31 and data processing section 32
is connected as a working system and loop path controller is connected, 73
Consider a system in which the data processing section 3 and the data processing section 34 are connected as a standby system. At this time, if communication in the active system is interrupted due to some failure occurring in the loop, the system management module 10 determines to change the active system of the loop. θ system,
Since the loops of the first system are operating independently, the system management module 10 stops packet communication of both systems in order to prevent abnormalities in packet transmission and reception processing due to switching. Next, the system management module 12 sends the control bucket A) which commands the change of the active system of the loop bus controller to the loop bus controller 23 in the data processing module 20, either individually or in a circular mode.

The loop bus controller 23 receives each control bucket) A and confirms the normality of the control bucket) A.
The loop bus controller 23 retains the contents of the water control bucket) A and notifies the loop bus controller 921 that it has become the active system. Furthermore, since the switching is due to a failure in the loop, the active system of the data processing unit is not changed and processing must continue. Therefore, the loop bus controller 23 temporarily stops the data processing of the data processing section 22.24, switches the interlacing, connects itself to the data processing section 22, and then restarts the data processing of the data processing section 22.24. Loop bus controller 23
The processing is executed by a hardware sequential circuit. Similar processing is performed up to the third data processing module.

Next, we will describe the procedure for changing the active system of the data processing unit due to individual failures in the data processing unit. Data processing module 30
, the loop bus controller 31 and the data processing section 3
2 is connected as a working system, and the roof lotus controller 3
3 (! When the data processing unit 34 is connected as a standby system and the system is in operation, if a failure occurs in the data processing unit 32, the system management module 10 that detected the failure in the data processing unit 32 The system management module 11 decides to remove the data processing section 32 from the active system and change the data processing section 34 to the active system.

A control bucket) A is sent from the system management module 11 to the loop bus controller 31 to instruct the change of the active system of the data processing unit. Upon receiving the control packet A, the loop bus controller 31 confirms the normality of the control bucket A, decodes the contents of the control packet A, holds the contents, and sends the loop bus controller 31 to the current data processing unit. Notifies that system switching will occur. Also, the processing of the data processing units 32 and 34 is stopped,
Switch the connection interlacing and connect the data processing unit 34 to yourself. Thereafter, the data processing units 32 and 34 are instructed to start processing. Processing in the loop bus controller 31 is executed by the hardware 1-order circuit.

〔Effect of the invention〕

As explained above, the present invention allows the system management module to change the active system and standby system of a duplicated distributed system.
For each data process, the hardware logic inside the gel is completely controlled by interfacing the loop transmission path with control packets, and problems with continuity of software processing that tend to be controlled from outside and recovery time after switching are avoided. By configuring the above problem with hardware-only logic to ensure reliability, it is possible to configure a highly reliable distributed packet data processing device.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of the present invention. 10...System management module, 11...
... System management module 0.12 ... System management module 1.20 ... Data processing module 1.21 ... Loop Pasco/Troller, 22 ... ...Data processing section, 23...
Loop path controller: 5, 24...data processing unit, 30...data processing module n, al
...Roof lot controller, 32...
-7-1' flA section, 33... Loop bus controller, 34... Data processing section.

Claims (1)

[Claims] A set of duplicated system management modules and at least one set of duplicated data processing modules are connected in a loop through a duplicated transmission path, and the data processing module is connected to a loop bus controller. In a distributed packet data processing device comprising a duplicated loop bus controller section and a data processing section, and having a supply connection between the duplicated loop bus controller section and the data processing section, the system management module includes:
A function for stopping or restarting packet communication within the loop, and instructing the data processing module to change the active system or standby system of at least one of the loop bus controller unit or the data processing unit using a control packet. The loop bus controller section, which is a component of the data processing module, has a function of receiving the control packet, a function of retaining changed contents, and a function of at least one of the loop bus controller section or the data processing section. The switching function between the active system and the standby system, the function of notifying the change contents to the mate system loop bus controller section, and the function of stopping and restarting software processing for the data processing section and the mate system data processing section are implemented using hardware logic. 1. A loop bus control method for a distributed packet data processing device, comprising a configuration method for configuring a distributed packet data processing device.