JPH0431209B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a digital multiplex conversion system,
In particular, the present invention relates to a system configuration method having a protection function.

[Conventional technology]

Conventionally, this type of digital multiplex conversion system
The configuration has one digital multiplex converter in one shelf, and the protection function is achieved by providing a signal switching device externally.
It was added by switching the Shelf itself to another Shelf.

[Problems that the invention attempts to solve]

In this way, the conventional digital multiplex conversion system has one digital multiplex conversion device in one shelf, and does not have a protection function within the shelf, so if no external signal switching device is provided, However, if some kind of failure occurred in the digital multiplex converter, the line would be disconnected.

Furthermore, when a protection function is provided to compensate for this drawback, an external signal switching device is required, which increases installation work, installation space, and installation costs.

[Means for solving problems]

The digital multiplex conversion system according to the present invention includes, within the same shelf, two digital multiplex conversion devices, an input/output signal concentration unit for concentrating input/output signals from all external sources related to multiplex conversion, and two digital multiplex conversion devices. and a control device that controls switching of devices.

[Effect]

There are two types of input/output signal concentration units with different functions, and when one of them is installed in a shelf, the control device has a protection function that allows one of the two digital multiplex converters to be used as a working unit and the other as a backup. If one digital multiplex converter is used as a digital multiplex conversion system, and the other is installed in the shelf, the control device performs the switch so that the two digital multiplex converters can be used independently.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a digital multiplex conversion system according to the present invention, in which two digital multiplex conversion devices in the same shelf are used as a digital multiplex converter having a protection function in which one is used as a working device and the other is used as a backup. An example of use as a conversion system is shown. In Figure 1, 111,1
13 is a digital multiplex converter; 115 is an input/output signal concentration unit (SW) that concentrates all input/output signals and performs switching; and 116, depending on the type of input/output signal concentration unit, two This is a control device that operates the digital multiplex converters independently, sets one as the working side and the other as the standby side, and controls switching between the working side and the standby side.
It's within 10.

Input/output signal concentration unit (SW) 1 of this embodiment
15 is configured so that one of the two digital multiplex converters can be used for current use and the other as a backup, and when installed in the shelf 110, the input/output signal concentration unit type determination signal 123
is sent to the control device 116. In the control device 116, this input/output signal concentration unit type determination signal 1
23, in this embodiment, the digital multiplex converters 111 and 113 are controlled so that one is used as a working device and the other is used as a backup.

Next, the operation of this embodiment will be explained with reference to FIG. However, digital multiplex converter 1
It is assumed that 11 is on the active side and digital multiplex converter 113 is on the backup side.

In this case, the control device 116 controls the digital multiplexing device 111 by the system switching signal 122.
is turned on, the digital multiplex converter 113 is turned off, and the input/output signal concentration unit (SW) 115 is controlled to be on the solid line side shown in the figure. Therefore, the low-order group input signals 101 to 102 are multiplexed in the digital multiplex converter 111, and the high-order group output signals 10
At the same time, the higher-order group input signal 1
06 is separated in the digital multiplex converter 111 and output as low-order group output signals 103 to 104.

In this state, the digital multiplex converter 11
1, the digital multiplex converter 111 sends a fault signal 120 to the control device 116. When the control device 116 receives the fault signal 120, the system switching signal 122 causes the control device 116 to
The digital multiplex converter 111 is turned off, the digital multiplex converter 113 is turned on, and the input/output signal concentration unit 115 is controlled to be on the dotted line side in the figure. As a result, the digital multiplex converter 111 is switched to the standby side, and the digital multiplex converter 113 is switched to the active side. Therefore, the low-order group input signals 101 to 102 are multiplexed in the digital multiplex converter 113 and output as the high-order group output signal 105, and at the same time, the high-order group input signal 106 is separated in the digital multiplex converter 113 and output as the low-order group output signal 105. It is output as next group output signals 103-104.

FIG. 2 is a block diagram showing another embodiment of the digital multiplex conversion system according to the present invention, which is a digital multiplex conversion system that does not have a protection function that allows two digital multiplex conversion devices in the same shelf to operate independently. An example of using it as a system is shown. The difference from Fig. 1 in terms of components is the input/output signal concentration unit (THR).
There are only 215.

Input/output signal concentration unit (THR) of this example
215 has a configuration in which two digital multiplex converters can be operated independently, as shown by the broken lines in the figure, and when installed in the shelf 110, like the one in FIG. 1, the input/output A signal concentration unit type determination signal 123 is sent to the control device 116. When the control device 116 receives this input/output signal concentration unit type determination signal 123,
In the case of this embodiment, the digital multiplex converter 111,
113 to operate independently.

Next, the operation of this embodiment will be explained with reference to FIG. The control device 116 controls the digital multiplex conversion device 1 by the system switching signal 122.
11 and 113 are both turned on. Therefore, the low-order group input signals 101-102
and 201 to 202 are multiplexed in digital multiplex conversion devices 111 and 113, respectively, and output as high-order group output signals 105 and 205, and at the same time, high-order group input signals 106 and 206 are respectively multiplexed in digital multiplex conversion device 11.
1 and 113 and output as low-order group output signals 103-104 and 203-204.

As mentioned above, the selection between the two embodiments shown in FIGS. 1 and 2 is achieved by simply replacing the two types of input/output signal concentration units 115 and 215.
Based on the input/output signal concentration unit type determination signal 123 sent from the input/output signal concentration units 115 and 215, the control device 116 selects which of the embodiments shown in FIG. 1 and FIG. 2 will be performed.

〔Effect of the invention〕

As explained above, according to the present invention, a protection function can be added to a digital multiplex conversion system by simply replacing the input/output signal concentration unit without providing an external signal switching device unlike the conventional system. A digital multiplex conversion system similar to the conventional one can be constructed very easily and at low cost without requiring any new equipment installation space.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the digital multiplex conversion system according to the present invention, and FIG. 2 is a block diagram showing another embodiment of the digital multiplex conversion system according to the present invention. 110... Shelf, 111, 113... Digital multiplex converter, 115... Input/output signal concentration unit (SW), 116... Control device, 215... Input/output signal concentration unit (THR).

Claims (1)

[Claims] 1. Within the same shelf, two digital multiplex converters, an input/output signal concentration unit that concentrates all external input/output signals related to multiplex conversion, and a control device that controls switching between the two digital multiplex converters. There are two types of input/output signal concentration units with different functions, and when one of them is installed in the shelf,
When the control device performs switching so that one of the two digital multiplex conversion devices can be used as a digital multiplex conversion system having a protection function in which one is currently used and the other is used as a backup, and the other is installed in the shelf, A digital multiplex conversion system, wherein the control device switches the two digital multiplex conversion devices so that they can be used independently.