JPH0630474B2 - Backup circuit monitoring method - Google Patents
Backup circuit monitoring methodInfo
- Publication number
- JPH0630474B2 JPH0630474B2 JP1138672A JP13867289A JPH0630474B2 JP H0630474 B2 JPH0630474 B2 JP H0630474B2 JP 1138672 A JP1138672 A JP 1138672A JP 13867289 A JP13867289 A JP 13867289A JP H0630474 B2 JPH0630474 B2 JP H0630474B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- order group
- line
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Monitoring And Testing Of Transmission In General (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、高信頼性が要求される装置で用いられる予備
回路の監視方式に関する。Description: TECHNICAL FIELD The present invention relates to a monitoring system for a standby circuit used in a device requiring high reliability.
予備回路は通信装置など、高信頼性が要求される装置に
おいて、通常使用している回路（現用側）が正常動作し
なくなった時、切替て使用するように設けられる。切替
が行われる時に予備回路が正常に機能するよう常に監視
を行なうのが予備回路監視装置である。The spare circuit is provided so as to be switched and used when a normally used circuit (working side) does not operate normally in a device such as a communication device that requires high reliability. The standby circuit monitoring device constantly monitors the standby circuit to function normally when switching is performed.
一般に、ある回路の動作を監視する場合、被監視回路に
ランダムパターン列などの監視信号を入力信号として与
え、被監視回路が出力した監視信号から、回路動作が正
常かどうかを判断する方法が用いられることが多い。In general, when monitoring the operation of a certain circuit, a method is used in which a monitored signal such as a random pattern sequence is given to the monitored circuit as an input signal and the circuit operation is judged from the monitored signal output from the monitored circuit. It is often done.
従来、複数の被監視回路に対して監視信号を共用し、効
率的に回路監視を行う方法が提案されている。第３図
に、この方法を低次群４回線、高次群１回線の多重化装
置に適用した例を示す。Conventionally, a method has been proposed in which a monitoring signal is shared by a plurality of monitored circuits to efficiently perform circuit monitoring. FIG. 3 shows an example in which this method is applied to a multiplexer of four low-order group lines and one high-order group line.
第３図において、多重化装置４００は、図示しない同一
構成の多重化装置とペアで用いられ、外部から与えられ
る選択信号ＳＥＬにより一方が現用、他方が予備に割り
当てられる。多重化装置４００は、第３図において予備
装置に選択されている（以下予備装置４００とする）。
予備装置４００は、監視信号用の予備入出力端子群４１
４と、現用装置として使用される場合の現用入出力端子
群４１３とを有している。これら２つの端子群４１３お
よび４１４は４本の低次群回線に対応しており、各回線
について入力用端子，出力用端子が必要なため８個の端
子を有している。予備入出力端子群４１４の入出力端
は、それぞれ監視装置４１０が有する監視信号入出力端
子群４１６の対応する端子と接続される。一方、現用入
出力端子群４１３の入出力端子には、現用装置に切替さ
れた時に低次群信号が与えられる予備伝送路が接続され
ている。また、予備装置４００は４本の各低次群回線に
対応して設けられた低次群回線用回路４０１〜４０４
と、多重化回路，多重分離回路を含み、４本の低次群回
線を１本の高次群回線に多重化、およびその逆の動作等
を行う高次群回線用回路４０５と、予備装置４００を現
用装置として用いるための切替スイッチ４０７１〜４０
７９を有している。一方、監視装置４１０は各１つの監
視信号発生回路４１１および監視信号受信回路４１２お
よび監視信号入出力端子群４１６から構成されている。In FIG. 3, the multiplexer 400 is used as a pair with a multiplexer of the same structure (not shown), and one of them is allocated to the current and the other is reserved by a selection signal SEL given from the outside. The multiplexing device 400 is selected as the backup device in FIG. 3 (hereinafter referred to as the backup device 400).
The backup device 400 includes a backup input / output terminal group 41 for monitoring signals.
4 and a working input / output terminal group 413 when used as a working device. These two terminal groups 413 and 414 correspond to four low-order group lines, and each line has eight terminals because an input terminal and an output terminal are required. The input / output terminals of the spare input / output terminal group 414 are connected to the corresponding terminals of the monitoring signal input / output terminal group 416 of the monitoring device 410. On the other hand, the input / output terminals of the active input / output terminal group 413 are connected to a backup transmission line to which a low-order group signal is applied when switched to the active device. Further, the backup device 400 is provided with circuits for low order group lines 401 to 404 provided corresponding to the four low order group lines.
A high-order group line circuit 405 including a multiplexing circuit and a demultiplexing circuit for performing multiplexing of four low-order group lines into one high-order group line and vice versa, and a standby device 400 as a current device. Switch 4071-40 for use as
It has 79. On the other hand, the monitoring device 410 includes one monitoring signal generating circuit 411, one monitoring signal receiving circuit 412, and one monitoring signal input / output terminal group 416.
次に第３図の動作を説明する。監視装置４１０内の監視
信号発生回路４１１が、たとえば周期性を有するパター
ン符号列等の、回路監視に十分な監視信号を発生する。
監視信号は監視信号入出力端子群４１６の対応する出力
端子から出力され、信号線を介して予備装置４００の予
備入出力端子群４１４の第１の低次群回線用回路に対応
する入出力端子に与えられる。この入力端子は第１の切
替スイッチ４０７１の一方の入力に接続されている。第
１の切替スイッチ４０７１の他方の入力は現用入出力端
子群４１３の対応する端子に接続されており、外部から
与えられる選択信号により２入力のうち一方を出力す
る。図中、全ての切替スイッチ４０７１〜４０７９は予
備側に選択されており、第１の切替スイッチ４０７１
は、予備入出力端子群からの入力信号すなわち監視信号
を出力する。第１の切替スイッチ４０７１の出力は第１
の低次群回線用回路４０１に入力され、たとえばＢ／Ｕ
(Bipolar to Unipolar)変換などを施された後、高次群
回線用回路４０５へ供給される。高次群回線用回路４０
５は第１〜第４の低次群回線用回路４０１〜４０４から
の信号を多重化し、高次群出力回線４０６ａへ出力す
る。多重化された信号は予備側を選択している切替スイ
ッチ４０７９を介して高次群入力回線４０６ｂに供給さ
れ、高次群回線用回路４０５へ折り返される。高次群回
線用回路４０５は、高次群入力回線４０６ｂから受信し
た信号を分離し、各低次群回線用回路４０１〜４０４へ
与える。各低次群回線用回路では高次群回線用回路４０
５からの信号にたとえばＵ／Ｂ変換などを行い、出力す
る。第１の低次群回線用回路４０１の出力信号は、第２
の切替スイッチ４０７２を介して監視装置４１０へ戻さ
れる。この信号は第１の低次群回線用回路４０１および
高次群回線用回路４０５が正常であれば、監視信号に等
しい。そこでこの信号を監視装置内で折り返し、再び監
視信号として第３の切替スイッチ４０７３を介して第２
の低次群回線用回路４０２に入力する。同様にして、第
３および第４の低次群回線用回路４０３および４０４に
監視信号を与え、第４の低次群回線用回路４０４から第
８の切替スイッチを介して戻ってきた監視信号を監視信
号受信回路４１２で監視信号発生回路４１１が発生した
ものと比較し、回路異常の有無を判断する。Next, the operation of FIG. 3 will be described. The monitor signal generation circuit 411 in the monitor device 410 generates a monitor signal sufficient for circuit monitoring, such as a pattern code string having periodicity.
The supervisory signal is output from the corresponding output terminal of the supervisory signal input / output terminal group 416, and the input / output terminal corresponding to the circuit for the first low-order group line of the spare input / output terminal group 414 of the standby device 400 via the signal line. Given to. This input terminal is connected to one input of the first changeover switch 4071. The other input of the first changeover switch 4071 is connected to the corresponding terminal of the current input / output terminal group 413 and outputs one of the two inputs according to a selection signal given from the outside. In the figure, all the changeover switches 4071 to 4079 are selected on the spare side, and the first changeover switch 4071 is selected.
Outputs an input signal from the spare input / output terminal group, that is, a monitor signal. The output of the first changeover switch 4071 is the first
Is input to the low-order group line circuit 401 of
After being subjected to (Bipolar to Unipolar) conversion, etc., it is supplied to the high-order group line circuit 405. Higher-order group circuit 40
Reference numeral 5 multiplexes the signals from the first to fourth low-order group line circuits 401 to 404 and outputs them to the high-order group output line 406a. The multiplexed signal is supplied to the high-order group input line 406b via the changeover switch 4079 that selects the protection side, and is returned to the high-order group line circuit 405. The high-order group line circuit 405 separates the signal received from the high-order group input line 406b and supplies it to each of the low-order group line circuits 401 to 404. In each low-order group circuit, high-order group circuit 40
The signal from 5 is subjected to, for example, U / B conversion and output. The output signal of the first low-order group circuit 401 is the second
It is returned to the monitoring device 410 via the changeover switch 4072. This signal is equal to the supervisory signal if the circuit 401 for the first low-order group line and the circuit 405 for the high-order group line are normal. Therefore, this signal is returned in the monitoring device, and again as a monitoring signal via the third changeover switch 4073 to the second signal.
Input to the low-order group line circuit 402. Similarly, the supervisory signal is given to the third and fourth low-order group line circuits 403 and 404, and the supervisory signal returned from the fourth low-order group line circuit 404 via the eighth changeover switch is sent. The supervisory signal receiving circuit 412 compares it with the one generated by the supervisory signal generating circuit 411 to judge the presence / absence of a circuit abnormality.
上述した従来の予備回路監視方式においては、予備回路
の出力信号を折り返す場合、一回監視装置内にもどし、
監視装置内で折り返しを行っていた。In the conventional backup circuit monitoring method described above, when the output signal of the backup circuit is folded back, it is returned to the monitoring device once,
It was turning back in the monitoring device.
そのため、ある予備回路から出力された監視信号が、他
の予備回路の監視信号として入力されるまでの信号線長
が長くなる。さらに、監視装置に予備回路からの監視信
号を受け、折り返し出力するための端子、信号線等を設
ける必要があった。Therefore, the signal line length until the supervisory signal output from a certain spare circuit is input as the supervisory signal of another spare circuit becomes long. Further, it is necessary to provide the monitoring device with a terminal, a signal line, and the like for receiving the monitoring signal from the spare circuit and outputting it back.
本発明の目的はさらに簡易な構成で同様な予備回路の監
視が可能な予備回路監視方式を提供することにある。An object of the present invention is to provide a standby circuit monitoring system capable of monitoring a similar backup circuit with a simpler configuration.
そのため、本発明では従来監視装置で行っていた監視信
号の折り返しを、被監視回路を有する予備装置内で行う
ことによって、上記目的を達成している。Therefore, in the present invention, the above-described object is achieved by folding back the monitoring signal, which is conventionally performed by the monitoring device, in the standby device having the monitored circuit.
次に本発明を図面を参照して詳細に説明する。第１図
は、第３図と同様に、低次群４回線高次群１回線の多重
変換装置に本発明を適用した例を示す。第１図中、第３
図と同一構成要素には同じ参照番号が付されている。第
１図において、監視信号発生回路４１１が回路監視に十
分な監視信号を発生してから、高次群回線用回路４０５
で多重・分離され、第１の低次群回線用回路４０１が高
次群回線用回路４０５からの監視信号を出力するまでは
第３図の従来例と同じである。この後来例では第２の切
替スイッチ４０７２を介して監視装置に監視信号をもど
し、監視装置で折り返して第２の低次群回線用回路４０
２へ与えていたが、本発明では折り返しを予備装置４０
０内部で行っている。すなわち、第１の低次群回線用回
路４０１から出力された監視信号を、現用入出力端子群
４１３の対応する出力端子に与えるとともに、第３の切
替スイッチ４０７３の一方の入力端子に直接与えてい
る。第３の切替スイッチ４０７３は第１の切替スイッチ
４０７１と同様、選択信号ＳＥＬにより予備側に選択さ
れているため、第１の低次群回線用回路４０１からの監
視信号を、第２の低次群回線用回路４０２に与える。Next, the present invention will be described in detail with reference to the drawings. Similar to FIG. 3, FIG. 1 shows an example in which the present invention is applied to a multiplex converter of low-order group 4 lines and high-order group 1 line. Third in FIG.
The same components as those in the figure are designated by the same reference numerals. In FIG. 1, after the supervisory signal generation circuit 411 has generated a supervisory signal sufficient for circuit supervision, the high-order group line circuit 405
It is the same as the conventional example shown in FIG. 3 until the first low-order group line circuit 401 outputs the supervisory signal from the high-order group line circuit 405. In the subsequent example, the monitoring signal is returned to the monitoring device via the second changeover switch 4072 and is returned by the monitoring device to return to the second low-order group line circuit 40.
However, in the present invention, folding back is performed by the backup device 40.
0 done internally. That is, the supervisory signal output from the first low-order group line circuit 401 is applied to the corresponding output terminal of the current input / output terminal group 413 and directly applied to one input terminal of the third changeover switch 4073. There is. Like the first changeover switch 4071, the third changeover switch 4073 is selected on the protection side by the selection signal SEL, so that the monitoring signal from the first low-order group line circuit 401 is changed to the second low-order line. It is given to the group line circuit 402.
以下同様に第２の低次群回線用回路４０２から第３の低
次群回線用回路へ、第３の低次群回線用回路４０３から
第４の低次群回線用回路４０４への折り返して行き、第
４の低次群回線用回路４０４の出力信号を第８の切替ス
イッチ４０７８および予備入出力端子群４１５の出力端
子を介して監視装置にもどし、監視信号受信回路４１２
において回路動作が正常か否かを判定する。本発明によ
り、切替スイッチが３個、予備入出力端子群４１５の端
子が６個、さらに予備装置４００と監視装置４１０間の
信号線と監視装置４１０の監視信号入出力端子群４１７
の端子が６個、監視信号折り返し用の信号線が全て不要
となり、その効果は大きい。Similarly, the circuit from the second low-order group line circuit 402 to the third low-order group line circuit and the third low-order group line circuit 403 to the fourth low-order group line circuit 404 are similarly folded. Then, the output signal of the fourth low-order group line circuit 404 is returned to the monitoring device via the eighth changeover switch 4078 and the output terminal of the spare input / output terminal group 415, and the monitoring signal receiving circuit 412 is received.
At, it is determined whether the circuit operation is normal. According to the present invention, there are three changeover switches, six terminals of the spare input / output terminal group 415, the signal line between the spare device 400 and the monitoring device 410, and the monitoring signal input / output terminal group 417 of the monitoring device 410.
6 terminals and all the signal lines for looping back the supervisory signal are unnecessary, which is a great effect.
第２図は本発明の他の実施例を示すブロック図である。
この実施例ではレベルの補正回路が用いられている。伝
送装置などの場合伝送路で減衰等を受けた信号を受信
するために感度の高い受信回路を有しているものや、
伝送路による波形のなまりやレベルの減少などを補償す
るようにあらかじめ出力信号を補正する送信回路を有す
るものである。例えば第１図の場合、低次群回線用回路
が上記，のいずれかに該当する場合、監視信号をそ
のまま折り返して低次群回線用回路に与えると、低次群
回線用回路の受信部が正常動作しない恐れがある。その
ため第２図においては監視信号の折り返しの途中に補正
回路７０６〜７０８を設け、正確な回路監視を行ってい
る。このような補正回路としてはたとえばＡＧＣ回路や
ＢＯＮ(Building Out Network)などが用いられる。FIG. 2 is a block diagram showing another embodiment of the present invention.
In this embodiment, a level correction circuit is used. In the case of a transmission device, etc., which has a highly sensitive receiving circuit for receiving a signal that has been attenuated in the transmission line,
It has a transmission circuit that corrects the output signal in advance so as to compensate for the rounding of the waveform and the decrease of the level due to the transmission path. For example, in the case of FIG. 1, when the circuit for the low order group line corresponds to any of the above, if the supervisory signal is returned as it is and given to the circuit for the low order group line, the receiving section of the circuit for the low order group line will It may not operate normally. Therefore, in FIG. 2, correction circuits 706 to 708 are provided in the middle of the loopback of the monitoring signal to perform accurate circuit monitoring. As such a correction circuit, for example, an AGC circuit or a BON (Building Out Network) is used.
以上説明したように本発明は、従来一旦監視装置内に戻
して折り返していた監視信号を、被監視回路を有する装
置内で折り返すことにより、大幅なコストダウンを図る
ことができる効果がある。As described above, the present invention has an effect that a large cost reduction can be achieved by returning the monitoring signal, which has been once returned to the monitoring apparatus and then returned, in the apparatus having the monitored circuit.
第１図は本発明の一実施例を示すブロック図、第２図は
本発明の他の実施例を示すブロック図、第３図は従来例
を示すブロック図である。 第１図〜第３図において、 ４００……予備装置、４１０……監視装置、４０１〜４
０４……低次群回線用回路、４０５……高次群回線用回
路、４０６ａ……高次群出力回線、４０６ｂ……高次群
入力回線、４０７１〜４０７９……切替スイッチ、４１
１……監視信号発生回路、４１２……監視信号受信回
路、７０１〜７０３……補正回路。FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing another embodiment of the present invention, and FIG. 3 is a block diagram showing a conventional example. 1 to 3, 400 ... Standby device, 410 ... Monitoring device, 401-4
04 ... Low-order group circuit, 405 ... High-order group circuit, 406a ... High-order group output line, 406b ... High-order group input line, 4071-4079 ... Changeover switch, 41
1 ... Supervisory signal generating circuit, 412 ... Supervisory signal receiving circuit, 701-703 ... Correction circuit.
Claims (1)
使用される予備装置に含まれる複数の独立した予備回路
の動作を監視する予備回路監視方式において、 前記複数の予備回路の動作監視に使用される監視信号を
発生し、この監視信号を前記複数の予備回路の１つに与
え、前記複数の予備回路のうち１つを通った前記監視信
号を前記予備装置内で折り返して、前記複数の予備回路
のうち前記監視信号を与えられていない予備回路の１つ
に与え、前記複数の予備回路の全てを通った前記監視信
号から前記複数の予備回路の動作が正常かどうかを判断
することを特徴とする予備回路監視方式。1. A backup circuit monitoring method for monitoring the operation of a plurality of independent backup circuits included in a backup device used when a current device does not operate normally. A supervisory signal to be used is generated, the supervisory signal is given to one of the plurality of spare circuits, and the supervisory signal passing through one of the plurality of spare circuits is folded back in the spare device to produce the plurality of spare circuits. Of the spare circuits to which one of the spare circuits has not been supplied, and judges whether the operation of the plurality of spare circuits is normal from the monitor signals that have passed through all of the plurality of spare circuits. Preliminary circuit monitoring method characterized by.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1138672A JPH0630474B2 (en) | 1989-05-30 | 1989-05-30 | Backup circuit monitoring method |
| US07/530,000 US5187704A (en) | 1988-03-31 | 1990-05-29 | Monitoring method for stand-by circuits suitable for a multiplexing/demultiplexing apparatus |
| AU56116/90A AU638015B2 (en) | 1989-05-30 | 1990-05-30 | Monitoring method for stand-by circuits suitable for a multiplexing/demultiplexing apparatus |
| EP19900110261 EP0400603A3 (en) | 1989-05-30 | 1990-05-30 | Monitoring method for stand-by circuits suitable for a multiplexing/demultiplexing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1138672A JPH0630474B2 (en) | 1989-05-30 | 1989-05-30 | Backup circuit monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH033435A JPH033435A (en) | 1991-01-09 |
| JPH0630474B2 true JPH0630474B2 (en) | 1994-04-20 |
Family
ID=15227418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1138672A Expired - Lifetime JPH0630474B2 (en) | 1988-03-31 | 1989-05-30 | Backup circuit monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0630474B2 (en) |
-
1989
- 1989-05-30 JP JP1138672A patent/JPH0630474B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH033435A (en) | 1991-01-09 |
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