JP2818002B2 - Channel switch control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] Regarding a switching method of a matrix switch for selectively connecting a channel on a host computer side and a terminal line on a terminal device side, a channel switch control capable of reliably switching when switching is required For the purpose of obtaining the method, the current switch information that determines the connection relationship of the matrix switch is compared with the new switch information that determines the connection relationship of the newly set matrix switch. For the different channels, each channel is provided with a start signal holding unit for temporarily holding the start signal of the terminal device until the switching of the matrix switch ends, and when the start signal of the terminal device is generated when the matrix switch is switched, , Suspends the activation of the terminal device, and It is configured to check the state of no communication and automatically switch the matrix switch.

[Industrial applications]

The present invention relates to a switching method of a matrix switch for selectively connecting a channel on a host computer and a terminal line on a terminal device such as a plurality of input / output devices.

In a system such as an online system such as a bank where a host computer has multiple online channels and a backup channel, and a plurality of terminal lines are connected to each channel, the backup channel may be disconnected due to a failure of the host computer. In order to easily change the connection between the channel and the line when it is necessary to switch the online channel, the channel and the terminal line are connected by a matrix switch.

Since the switching of the matrix switch needs to be performed so as not to affect the system, the switching is performed when a channel causing a change in connection is not communicating.

However, when the terminal device is used frequently, it is difficult to catch the time when the predetermined channel is not communicating, and the switching may not be performed forever.

The present invention relates to a channel switch control method capable of reliably switching between a channel and a terminal line when switching is required.

[Conventional technology]

Referring to FIG. 3, a conventional channel switch control method and its operation flow will be described.

FIG. 3A shows a configuration of a conventional channel switch control system.

In the figure, reference numeral 31 denotes a switch (SW) switching operation unit for switching a connection relationship between a channel such as a manual switch and a terminal line, and 32 sets on / off at each coordinate of a matrix switch by a switching operation of the switch switching operation unit 31. A switch (SW) control unit 33 is a matrix switch that determines connection between a plurality of channels (CH0 to CH3) on the host computer side and a plurality of terminal lines (IOA to IOD).

The coordinates indicating the intersection of each channel of the matrix switch and each terminal line are 0A, 0B... 3D as shown in the figure.

The figure shows a state in which the matrix switches 0A, 1B, and 0C are on, that is, CH0 is connected to the terminal lines IOA and IOC, and channel 1 is connected to the terminal line IOB.

For example, consider a case in which 0D is increased from the state of the matrix switch shown in the figure as a connection point.

In such a case, conventionally, the operator operates the manual switch of the switch switching operation unit 31 after confirming that none of the terminal devices connecting the CH0 and the IOA and the terminal device connecting the CH0 and the IOC is activated. To connect the 0D of the matrix switch.

FIG. 3 (b) shows a flow of the switch switching operation of the conventional channel switch control method.

 The flow will be described in the order of the numbers shown.

(41) Invent the need to change the connection of the matrix switch.

(42) The operator of the switch switching checks whether the connected channel is not communicating with the terminal device.

(43) (44) Confirm that communication is not in progress and execute switch switching.

[Problems to be solved by the invention]

When a terminal is frequently used, it is difficult to catch a state in which all channels that cause a change in connection are not communicating, and in the past, switching could not be performed forever.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a channel switch control method capable of reliably switching when a matrix switch needs to be switched.

[Means for solving the problem]

The present invention compares the connection information of the current matrix switch with the connection information to be newly changed, identifies the channel that causes a change due to the new connection and the channel that does not change, and determines the channel that causes the change by the host computer. In order not to transmit the start signal from the terminal line side, it was temporarily held.

Then, the idle state of the channel that causes a change in the connection is confirmed, and the connection of the matrix switch is automatically changed.

 FIG. 1 shows the basic configuration of the present invention.

In the figure, reference numeral 1 denotes a new switch information storage unit that determines a connection of a matrix switch to be newly set, 2 denotes a current switch information storage unit that determines a connection of a matrix switch, and 3 denotes an idle state of a channel that causes a change in switch information. After confirmation, a switch (S) for shifting the connection of the new switch information storage 1 to the current switch information storage 2
W) The migration control unit 4 constantly monitors the difference between the connection information of the new switch information storage unit 1 and the connection information of the current switch information storage unit 2 and determines the channel having the difference between the connection information and the channel having no difference. A switch (SW) information monitoring unit that outputs one of the signals for each channel, a switch (SW) control unit that sets a matrix switch based on the matrix switch information in the current switch information storage unit 2, and a plurality of channels. Matrix switches for determining the subsequent combinations of CH0 to CH3 and the plurality of terminal lines IOA to IOD. 7-1 to 7-4 are activation signal holding units for CH0 to CH3, respectively, and are sent from the switch information monitoring unit 4. When receiving a signal indicating that there is a difference between the information in the new switch information storage unit 1 and the information in the current switch information storage unit 2 of the corresponding channel, the activation signal of that channel is suspended. It is intended.

[Action]

 The operation of the basic configuration shown in FIG. 1 will be described.

For example, as shown in the drawing, the switch information in the current switch information storage unit is such that the coordinates 0A, 1B, and 0C of the matrix switch are on (the on state is 1) and all others are off (the off state is 0). And

Now, consider a case where a state in which 0D is turned on is newly added as new switch information.

The switch information monitoring unit 4 compares the new switch information and the current switch information for each coordinate of the matrix switch, and outputs, for example, 0 when there is a coordinate having different information in the channel, and outputs all the channels. If there is no connection change in the coordinates of, for example, 1 is output.

Then, the signal is input to the corresponding start signal holding units 7-1 to 7-4 of each channel.

Each of the activation signal holding units 7-1 to 7-4 converts the activation signal transmitted from the host computer to the matrix switch when, for example, 1 is received among the signals transmitted from the switch information monitoring unit 4. Is temporarily suspended until the connection of the device changes to the connection state of the new switch information.

The switch transition control unit 3 receives the signal transmitted from the switch information monitoring unit 4 and the signal indicating the state where there is no communication between the host computer and the terminal device, and the channel in the channel holding the activation signal is in the idle state. Then, the new switch information is transferred to the current switch information. Then, the switch control unit 5 sets the connection of the matrix switch based on the current switch information.

〔Example〕

 An embodiment of the present invention will be described with reference to FIG.

FIG. 2A shows an embodiment of the activation signal holding section of the present invention.

In the figure, 20 and 21 are AND circuits, 22 is an OR circuit, and 23 is a flip-flop (FF).

 A device having the circuit configuration shown is placed in each channel.

The figure is placed on channel CH0, and EQO is a signal for holding the activation signal of channel CH0 sent from the switch information monitoring unit, and is set to 0 when a change occurs in the matrix switch. If there is no change, it is 1 (EQO will be described later).

The activation signal of channel CH0 is input to AND circuits 20 and 21.

The output of the FF23 is input to the AND circuit 21 and simultaneously to the matrix switch CH0.

When a change of the matrix switch occurs in the channel CH0, the input of the AND circuit 20 becomes 0. Therefore, a start signal is generated in CH0, and even if the input changes from 0 to 1, the output of the FF23 does not change. , The start signal is held.

When there is no change in the connection of the channel CH0, EQ0 is 1, so that the change of the start signal of CH0 becomes the change of the output of the FF23 as it is, and is transmitted to the terminal device via the connection of the matrix switch.

FIG. 2 (b) shows an embodiment of the matrix switch switching unit. The new switch information storage unit 1, the current switch information storage unit 2, the switch transfer control unit 3,
2 shows a part including the switch information monitoring unit 4.

In the figure, reference numeral 24 denotes a new switch information storage unit having connection information to be newly set for each matrix switch coordinate, and reference numeral 25 denotes a current switch information storage unit, which stores the current switch information for each matrix switch coordinate. The matrix switch connection information 26 determines the switchable time of the matrix switch based on the outputs EQ0-3 and the idle signals IDL0-3 from the NOR circuit 28, and converts the new switch information into the current switch information. Transition signal
A switch (SW) transition control unit for outputting CLKEN; 27, an exclusive OR circuit for taking an exclusive OR with connection information of the same coordinates of the matrix switches in the new switch information storage unit 24 and the current switch information storage unit 25; Is a NOR circuit that performs a NOR operation on the coordinates of the same channel among the outputs of the exclusive OR circuit 27, and 29 is a start signal transmitted from the host computer and transmitted from the terminal device for each channel. This is a NOR circuit that performs a NOR operation on a signal OPI indicating that communication is being performed.

For example, the current switch information is 0A, 1B, 0C is 1,
It is assumed that all others are 0.

Then, as new switch information, 0D is added to the current switch information.
Let us consider a case where a new state of 1 is added.

In the figure, the output of the NOR circuit 28 to the channel CH0 is EQ0
And EQ0 = ▲ ▼ ・ ▲ ▼ ・ ▲ ▼ ・ ▲
▼

However, EQ0A, EQ0B, EQ0C, and EQ0D are the exclusive OR of the coordinates 0A, 0B, 0C, and 0D of the new switch information and the current switch information, respectively.

Accordingly, EQ0 = 0 for channel CH0 because the new switch information and the current switch information are changed.

The outputs EQ1 to EQ3 of the NOR circuits 28 of CH1 to CH3 which have no change in the connection of the matrix switch in the channel are all 0.

Therefore, the activation signal holding unit in FIG. 2A holds the activation signal in the channel CH0, but passes the other channels.

The logical expression of the switch movement control unit 26 is determined as follows.

CLKEN = (EQ0 + IDL0) ・ (EQ1 + IDL1) ・ (EQ2 + IDL2) ・ (EQ3 + IDL3) However, EQ0 = ▲ ▼ ・ ▲ ▼ ・ ▲ ▼ ・ ▲
EQ Similarly, EQ1 to EQ3 are created for each corresponding coordinate.

 IDL0 = ▲, IDL0 is a signal indicating the idle state of channel 1.

SL0 is a start signal of channel 1 sent from the host computer side, and represents a state where SL0 = 0 and no start signal. The OPI is a signal transmitted from the terminal device side, and is a signal indicating that the terminal device is communicating. OPI = 0 indicates that communication is not in progress.

Therefore, according to the above condition, when both SL0 and OPI are not 1, that is, when there is no start signal and the terminal device is not communicating, IDL0 becomes 1, so that this state is captured and the matrix switch is turned off. Switching is performed.

IDL1 to IDL3 are similarly created for the other channels CH1 to CH3.

In the above logical formula, in the case of the embodiment, EQ0 = 0, EQ1
= 1, EQ2 = 1, EQ3 = 1, so IDL of channel CH0
When 0 changes from 0 to 1, CLKEN changes from 0 to 1, and the information in the new switch information storage unit shifts to the current switch information storage unit.

〔The invention's effect〕

According to the present invention, the activation signal of the channel that affects the matrix switch switching is automatically suspended until the switch switching is completed, and the switching timing is not affected when the channel communication is completed or the switching is not affected. Since the timing is automatically detected and switched, even when the terminal equipment connected to the channel is frequently used, it is necessary to reliably switch the line when switching is necessary. Can be.

[Brief description of the drawings]

 FIG. 1 is a diagram showing a basic configuration of the present invention. FIG. 2 is a diagram showing an embodiment of the present invention. FIG. 3 is a diagram showing a conventional technique. In FIG. 1, 1: new switch information storage unit, 2: current switch information storage unit, 3: switch transition control unit, 4: switch information monitoring unit, 5: switch control unit, 6: matrix switch, 7-1 to 7-1. 7-4: Start signal holding unit.

Claims (2)

(57) [Claims] In a system in which a plurality of terminal devices are connected to at least one channel on a host computer side, a matrix switch control system for selectively connecting a channel and a plurality of terminal lines on the terminal device side is provided. The current switch information that defines the connection relationship of the matrix switch is compared with the new switch information that defines the connection relationship of the newly set matrix switch. Each channel has a start signal holding unit that temporarily holds the start signal of the device until the switching of the matrix switch is completed. If a start signal of the terminal device is generated when switching the matrix switch, the start of the terminal device is temporarily held. And
A channel switch control method that automatically switches the matrix switch after confirming that there is no channel communication. 2. A current switch information storage unit that defines a current matrix switch connection relationship, a new switch information storage unit that defines a newly set connection relationship, a current switch information storage unit, and a new switch information storage unit. Switches that have different information between the current switch information and the new switch information and the channels that have the same information, and output different signals to the corresponding channels in each case. An information monitoring unit, and a channel-corresponding signal from the switch information monitoring unit is input, and when a signal indicating a different state between the current switch information and the new switch information is input, a start signal of the terminal device in the corresponding channel. A start signal holding unit that temporarily suspends the switching of the matrix switch until the switching of the matrix switch is completed. Detects the state,
The channel switch control method according to claim 1, further comprising: a switch transfer control unit that controls transfer of information in the new switch information storage unit to the current switch information storage unit.