JPH01296719A - Active/standby switching system - Google Patents

Abstract

PURPOSE:To improve the communication quality of a real signal by confirming the operating state of the real signal when a fault takes place in a part not giving effect on the communication of the real signal so as to switch an active communication equipment and a standby communication equipment. CONSTITUTION:If a fault occurred in a signal processing section 20B does not give adverse effect on a communication processing section 20A, a synthesis section 22 and a transmission section 23, a control section 13 does not immediately apply switching control but applies switching control when a signal used mainly by a communication equipment is not communicated in response to a detection signal from a detection section 21. If a fault takes place in a means not being a means relating to an input signal applying mainly the communication, the switching of the active/standby equipment is not immediately applied but the active/standby changeover is applied at a time zone when the signal applying communication mainly is not in use. Thus, the communication is made continuous regardless of a fault of the other means by the signal applying mainly the communication and the communication quality is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a switching system between a working device and a standby device when a plurality of devices such as transmitters and receivers are used and the device has a plurality of input signals.

〔overview〕

The present invention provides a working standby switching device for a communication device that is equipped with means for processing subordinate signals in addition to the main signal, the real signal, when a failure occurs in a part that does not affect the communication of the real signal. In this case, the communication quality of the actual signal can be improved by switching between the active communication device and the standby communication device after checking the actual signal usage status If and R.

[Conventional technology]

There are known configurations in which one backup device is prepared for one active device and one backup device is prepared for N active devices, but conventionally, switching between the active device and the backup device is performed. In this case, the input signal to the device is composed of one line, and if a failure occurs in the current device, the input signal will no longer be output normally, and the device will be immediately switched to the backup device.

[Problem that the invention seeks to solve]

BACKGROUND ART In recent years, as devices have become smaller, devices that were conventionally made up of a plurality of devices are now made up of a single device, and as a result, there are cases in which the number of input signals to the device becomes plural. However, if the current device is immediately switched to a backup device when a failure occurs as in the conventional example, there is a drawback that communication may be interrupted even if the failure occurs at a location that does not adversely affect actual use.

For example, at an earth station that performs satellite communications, telephone signals and data signals, so-called ESC, are used to communicate the earth station's line settings.
In some cases, signals are multiplexed with signals used for public communication (hereinafter referred to as real signals) for communication. In such a case, even if the signal processing unit that processes the ESC signal fails, it often does not affect the communication of the actual signal. In such a case, if you switch the signal from the active communication device to the backup communication device,
The drawback is that the actual signal is cut off, which has a great impact on communication.

SUMMARY OF THE INVENTION The present invention aims to eliminate such drawbacks and provides a working standby switching device that can switch to a standby device without adversely affecting the main signal in the event of a failure of a means relating to a subordinate signal. .

[Means for solving problems]

The present invention includes a plurality of communication devices each having a signal processing section that individually processes a plurality of input signals, and a switching device having a switching means for switching and connecting an input signal to a communication device in a failure state to a designated communication device. In the working/standby switching system equipped with
The communication device includes a first detection means for detecting a reception state of a specific input signal among a plurality of input signals to the communication device, and a failure state of the signal processing unit, which is identified and detected for each signal processing unit. The switching device includes a second detection means, and the switching device is connected to a signal processing section in which a failure state is detected by the second detection means among the signal processing sections that process input signals other than the specific input signal. The device is characterized by having a control unit that temporarily prohibits activation of the device during a period in which the first detection means detects the receiving state of the specific input signal. In the case of a failure in a related part, the working reserve is immediately switched. In the case of a failure in a part unrelated to the communication of the main signal, the working reserve is switched if the main signal communication is not being performed. This aims to improve the communication quality of the main signal communication.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings. 1st
The figure is a block configuration diagram showing the configuration of this embodiment.

In this embodiment, as shown in FIG. 1, communication devices 2-1 and 2-2 are used as active devices, and communication device 2-3 is used as a common standby device for communication devices 2-1 and 2-2. , the configuration is such that the switching device 1 performs switching between the active device and the standby device. Each of the communication devices 2-1, 2-2 and 2-3 includes a first signal processing unit 2OA that processes the input signal 101-A or 102-A, and a first signal processing unit 2OA that processes the input signal 101-B or 102-B. A second signal processing unit 20B that performs processing, a combining unit 22 that combines the signals processed by the signal processing unit 20A and the signal processing unit 20B, a transmitting unit 23 that outputs the signal combined by the combining unit 22, and a device. The detecting section 21 detects whether an input signal is input to the signal processing section 2OA based on a status signal from the signal processing section 2OA, which mainly processes signals for communication. The switching device 1 has a branching unit 10- which branches input signals 101-A, 101-B, 102-A and 102-B to the working communication devices 2-1 and 2-2 and the backup communication device 2-3. IA
.

1O-IB, 1O-2A and 10-2B, and input signals to the backup communication device 2-3 to the current communication device 2-1.
and 2-2, switching units 11A and 11B select which device to use as an input signal, and communication device 2-2.
1.2-2 and 2-3 output signals 121.122o,
and 123 to select which signal to output. That is, this embodiment includes a plurality of communication devices 2-L 2-2 and 2-3 each having signal processing units 2OA and 20B that individually process a plurality of input signals, and a plurality of communication devices 2-L 2-2 and 2-3 that individually process a plurality of input signals. Branching units 1O-LA, 1O-IB, and 10-2A are switching means for switching and connecting to specified communication devices.
, 10-2 B and switching parts 11A, 11B, 1
2-1.12-2, and each of the communication devices 2-1, 2-2 and 2-3 switches a specific input signal among a plurality of input signals to its own device. The switching device 1 has a detecting section 21 which is a first detecting means for detecting a receiving state, and a second detecting means (not shown) which identifies and detects a failure state of the signal processing section for each signal processing section. , the first detection means activates the switching means associated with the signal processing section for which the failure state is detected by the second detection means among the signal processing sections that process input signals other than the specific input signal; It has a control unit 13 that temporarily prohibits the reception state of the input signal during the period when the reception state of the input signal is detected.

Next, the operation of this embodiment will be explained.

Input signals 101-A and 101-B are branched at branch sections 1O-IA and 1O-IB of switching device 1, and input to communication device 2-1 and switching sections IIA and IIB.

Similarly, input signals 102-A and 102-B are input to communication device 2-2 and switching units 11A and IIB.

The switching units 11A and 11B switch whether the communication device 2-3 inputs the same input signal as the communication device 2-1 or manually inputs the same input signal as the communication device 2-2 in response to a control signal from the control unit 13. I do. The signals 111-A and 1ll-B inputted to the communication device 2-1 are processed by the signal processing units 2OA and 20B, respectively, and the signals are processed by the combining unit 22.
The signals are combined, and the transmitter 23 outputs the signal 121. The signal 111-A is a signal mainly used by the communication device 2-1, and the signal 111-B is a subordinate signal to the signal 111-A, which is used to set up a line, for example. The detection unit 21 detects whether or not the input signal 111A is actually communicating based on the information signal from the signal processing unit 2OA, and sends this detection signal to the control unit 13 of the switching device 1.

In addition, signals for synchronization are sent from the signal processing unit 2OA to the signal processing unit 20B, and the signal 111-B is the signal 1
11-A. Similarly, communication devices 2-2 and 2
-3 outputs a signal 122 and a signal 123, respectively. The switching units 12-1 and 12-2 switch between the output signal 121 of the communication device 2-1 and the output signal 1 of the communication device 2-3.
22 and output it. The control unit 13 of the switching device 10 forms the signal path shown in FIG. 1 when the communication devices 2-1, 2-2 and 2-3 are normal.

If a failure occurs in the combining section 22 or the transmitting section 23 of the communication device 2-1, the input signals 111-A and 111-B will not be output normally, so the control section 13 of the switching device 1 1 to control the output signal 12 of the communication device 2-3.
Select 3 and output. Further, if the communication device 2-1 is normal but a failure occurs in the combining section or the transmitting section of the communication device 2-2, the control section 13 of the switching device will control the switching sections 11A and 1.
1B to input signals 102-A and 102-
B is selected, and the switching unit 12-2 is controlled to select and output the output signal of the communication device 2-3. Similar switching control is performed when a failure occurs in the signal processing unit 2OA, but if a failure occurs in the signal processing unit 20B, the signal processing unit 2
If the OA, the combining unit 22 and the transmitting unit 23 are not adversely affected, the control unit 13 does not immediately perform switching control, and the signal mainly used by the communication device is communicated according to the detection signal from the detection unit 21. Switching control is performed if not. If a failure of the signal processing unit 20B adversely affects the signal processing unit 20A1 combining unit 22 and transmitting unit 23,
Switching control can also be performed immediately.

〔Effect of the invention〕

As explained above, the present invention provides for immediate switching of the active/backup device when a failure occurs in a means other than the means mainly related to the input signals for communication when switching the active/backup device for a device having a plurality of input signals. Since the active and backup signals are switched during the time period when the main communication signals are not in use, communication can be continued even if the main communication signals fail in other means. This has the effect of improving communication quality.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a block configuration diagram showing the configuration of a conventional example. 1... Switching device, 2-1.2-2.2-3... Communication device, 1o-IA, 10-IB, 10-2 A,
10-2B. 10-1.10-2..., Branch, 11.118, l
IB, 12-L12-2...Switching unit, 13...Control unit, 2OA, 20B...Signal processing unit, 21...Detection unit, 22...Combining unit, 23...Transmission unit .

Claims (1)

[Claims] 1. A plurality of communication devices (2) each having a signal processing unit that individually processes a plurality of input signals, and switching and connecting an input signal to a communication device in a failure state to a designated communication device. In a working/standby switching system comprising a switching device (1) having switching means, the communication device comprises a first detection means for detecting a reception state of a specific input signal among a plurality of input signals to the communication device; The switching device includes a second detection means for identifying and detecting a failure state of the signal processing unit for each signal processing unit, A control unit (13 ).