JPS63285041A - Master/slave switching system - Google Patents
Master/slave switching systemInfo
- Publication number
- JPS63285041A JPS63285041A JP62120579A JP12057987A JPS63285041A JP S63285041 A JPS63285041 A JP S63285041A JP 62120579 A JP62120579 A JP 62120579A JP 12057987 A JP12057987 A JP 12057987A JP S63285041 A JPS63285041 A JP S63285041A
- Authority
- JP
- Japan
- Prior art keywords
- polling
- repeater
- terminal device
- station
- master
- 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.)
- Pending
Links
- 238000012806 monitoring device Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 abstract description 25
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Landscapes
- Small-Scale Networks (AREA)
Abstract
Description
【発明の詳細な説明】
〔概 要〕
中Il!器等のアラームモニタをCPU制御で切替えて
モニタ内容を記憶し、アクセスされた時にアラーム情報
が吸い上げられるようにしたもの。[Detailed Description of the Invention] [Summary] Middle Il! A device that switches the alarm monitor of a device, etc. under CPU control, stores the monitor contents, and retrieves the alarm information when accessed.
本発明は、中継器が挿入された伝送路の監視を行なうマ
スタ/スレーブ端末装置の切替方式に関する。The present invention relates to a master/slave terminal device switching system that monitors a transmission path in which a repeater is inserted.
中継器が挿入された伝送路の、光信号を用いた監視方式
としては例えば第3図がある。この図でL RE (1
ine repeater equipment )は
該中継器、L T E (1ine terminal
equipment )は該中継器のエラー監視を行
なう端末装置である。端末装置LTEにはマスタMとス
レーブSがあり、マスタ端末装置M−LTEは自己と中
継器LRHのエラー監視を行ない、スレーブ端末装置5
−LTEは自己のみのエラー監視を行なう。この第3図
は一次群PCM伝送路の監視システムを示しており、中
継器LREは図示しない該伝送路に挿入され、端末装置
LTEは子局に配設され、エラー情報を親局の監視装置
へ伝送する。An example of a monitoring method using optical signals for a transmission line in which a repeater is inserted is shown in FIG. 3. In this figure, L RE (1
ine repeater equipment) is the repeater, LTE (one terminal
equipment) is a terminal device that monitors errors in the repeater. The terminal device LTE has a master M and a slave S, and the master terminal device M-LTE performs error monitoring of itself and the repeater LRH, and the slave terminal device 5
- LTE performs self-only error monitoring. This FIG. 3 shows a monitoring system for a primary group PCM transmission line, in which a repeater LRE is inserted into the transmission line (not shown), a terminal device LTE is installed in a slave station, and error information is transmitted to a monitoring system of a master station. Transmit to.
マスタ端末装置M−LTEは監視線11を通して中継器
LREのエラー監視をするが、監視線1+が例えば点P
で切断されると、その後の中継器のエラー監視はできな
くなる。この問題に対しては監視線をもう1本(J2)
増設して、監視線11の障害時はβ2を使用してM−L
TEはLREを監視するまたは5−LTEをM−LTE
の如く動作させて5−LTEからa2を使用してLRE
の監視を行なうことが考えられるが、この方式では監視
回路が2系統必要になり、コストパーフォーマンスの高
いシステムとは言い難い。The master terminal device M-LTE monitors errors in the repeater LRE through the monitoring line 11, but the monitoring line 1+ is connected to the point P, for example.
If the connection is disconnected, subsequent error monitoring of the repeater will no longer be possible. For this problem, add another monitoring line (J2)
When the monitoring line 11 fails, use β2 to connect M-L.
TE monitors LRE or 5-LTE to M-LTE
Run it like this and use a2 from 5-LTE to LRE
However, this method requires two systems of monitoring circuits and cannot be said to be a highly cost-effective system.
監視線が1系統では障害になったとき監視情報が得られ
ず、監視線を2系統にしたのでは、1系統障害でも監視
情報が得られる反面、設備費の増加は避けられない。そ
こで本発明は、ソフトウェア上で冗長性を持たせた設計
を行なうことでハードウェア規模の縮小を行ない、低コ
ストで高信頼性の監視回線を提供しようとするものであ
る。If there is only one line of monitoring line, no monitoring information can be obtained in the event of a failure, but if there are two lines of monitoring line, monitoring information can be obtained even if one line has a failure, but an increase in equipment costs is unavoidable. Therefore, the present invention aims to reduce the hardware scale by designing software with redundancy, and to provide a highly reliable monitoring line at low cost.
第1図に示すように本発明では中継器R(第3図のLR
Eに相当する)の監視をマスタMとスレーブSの両方か
ら行なう。これらのM、Sは前記M−LTE、5−LT
Eに相当し、−次群PCM伝送路の各局(図ではA局と
B局とする)に置かれる。A局は中IlI器Rの各々と
B局に対してポーリングを行ない、各々の状態を収集す
る。またB局は中継器Rの各々とA局に対してポーリン
グし、各々の状態を収集する。これは交互に行なうよう
に各局のLTEのソフトウェアを設計する。従って1サ
イクルは、A局が中継器R1,R2,R3及びB局を順
次ポーリングし、次にB局が中継器R3,R2,R1及
びA局を順次ポーリングすることで構成され、このサイ
クルが繰り返される。As shown in FIG. 1, in the present invention, repeater R (LR in FIG.
(corresponding to E) is monitored from both master M and slave S. These M and S are the M-LTE, 5-LT
E, and is placed at each station (station A and station B in the figure) of the -th group PCM transmission path. Station A polls each of the medium IlI units R and station B, and collects the status of each. In addition, the B station polls each of the repeaters R and the A station, and collects the status of each. The LTE software of each station is designed to perform this alternately. Therefore, one cycle consists of the A station sequentially polling repeaters R1, R2, R3 and the B station, and then the B station sequentially polling the repeaters R3, R2, R1 and the A station. Repeated.
こうしてA、B局には各回のポーリング結果が集められ
、記憶される。In this way, each polling result is collected and stored in stations A and B.
上記A、B局からのポーリングで、監視回線βが正常な
らA、B両局が持っているポーリング結果は同じである
。監視線lが例えば点Pで断線すると、A局からのポー
リングでは中継器R1とR2に対してしかデータ収集で
きず、B局からのポーリングでは中継器R3に対してし
かデータ収集できず、両局の持つポーリング結果は異な
ることになる。In the polling from stations A and B, if the monitoring line β is normal, the polling results held by both stations A and B are the same. For example, if the monitoring line l is disconnected at point P, polling from station A can collect data only for repeaters R1 and R2, polling from station B can collect data only for repeater R3, and both Stations will have different polling results.
A、 B両局が持つポーリング結果は上位の監視装置S
S V (slave 5upervisary)
を通して取寄せることができ、これらにより点Pで障害
が発生しても全中継器の状態を把握することができる。The polling results held by both stations A and B are sent to the upper monitoring device S.
SV (slave 5supervisary)
With these, even if a failure occurs at point P, the status of all repeaters can be known.
またこれらのポーリング結果から故障点の特定ができ、
直ちに障害復旧作業に入ることができる。In addition, the failure point can be identified from these polling results.
Disaster recovery work can begin immediately.
第2図に本発明の実施例を示す。中継器LRE(詳しく
はそのジャック アンド アラームJ/A)は監視線β
のデータを一旦取込み、自己宛のものでなければそれを
次段へ送出するカスケード構成をとっている。この方式
では送出信号レベルはOdBであるから各中継器で増幅
が行なわれたことになり、信号の減衰に格別配慮する必
要がない。図示しないがJ/A部の主要構成はプロセッ
サCPUとM及びS側のFSXインタフェース(モデム
)である。即ちこの監視回線はFSK方式%式%
ポーリングはマスタ端末装置M−LTEからLREI、
2.3および5−LTEに対して行ない、次にスレーブ
端末装置5−LTEがLRE3.2゜1及びM−LTE
に対して行ない、以下これを繰り返す、この状態で例え
ば点Pで回線障害が発生すると、5−LTEはM −、
L T Eよりポーリングされなくなる。このときスレ
ーブ端末装置5−LTEはスレーブ監視装置5SV2を
介してマスタ監視装置MSVに割込みをかけ、ポーリン
グ結果の採取を要求する。そこでMSVは5SVI、5
SV2を介してマスタ端末装置M−LTE及びスレーブ
端末装置5−LTEの各ポーリング結果を取寄せ、これ
らにより各LREの状態を知りまた障害位置の特定を行
なう。FIG. 2 shows an embodiment of the present invention. The repeater LRE (more specifically, its jack and alarm J/A) is the monitoring line β
It has a cascade configuration in which it takes in the data once and sends it to the next stage if it is not addressed to itself. In this system, since the output signal level is OdB, each repeater performs amplification, and there is no need to take special consideration to signal attenuation. Although not shown, the main components of the J/A section are a processor CPU and FSX interfaces (modems) on the M and S sides. In other words, this monitoring line is based on the FSK method.The polling is carried out from the master terminal device M-LTE to the LREI,
2.3 and 5-LTE, and then slave terminal device 5-LTE performs LRE3.2゜1 and M-LTE.
For example, if a line failure occurs at point P in this state, 5-LTE will perform M-,
It will no longer be polled from LTE. At this time, the slave terminal device 5-LTE interrupts the master monitoring device MSV via the slave monitoring device 5SV2 and requests collection of polling results. Therefore, MSV is 5SVI, 5
The polling results of the master terminal device M-LTE and the slave terminal device 5-LTE are obtained via the SV2, and based on these, the status of each LRE is known and the location of the fault is specified.
中継器LREは36回線分の増幅器を有しており、中継
器の状態とはこれらの各回線の信号の有無、ビットエラ
ー率などである。The repeater LRE has amplifiers for 36 lines, and the status of the repeater includes the presence or absence of a signal on each of these lines, the bit error rate, etc.
監視装置SSVは常時は当該局(端局装置)の他の装f
f(交換機、多重化装置など)の監視を行なっており、
5−LTEからの上記割込みが入るときポーリング結果
の取寄せを行なう。従って本発明を実施してもハードウ
ェアはそれ程変更/増設されず、ソフトウェアの追加で
済む。The monitoring device SSV is always connected to other equipment of the station (terminal device).
f (switching equipment, multiplexing equipment, etc.)
When the above-mentioned interrupt from 5-LTE is received, the polling results are retrieved. Therefore, even if the present invention is implemented, the hardware will not be changed or expanded so much, and only software will be added.
回線障害のない状態ではマスタ、スレーブ両端末装置の
ポーリング結果は同じであり、従ってマスタ端末装置の
ポーリング結果で代表してこれを親局の監視装置へ送出
する。In a state where there is no line failure, the polling results of both the master and slave terminal devices are the same, so the polling results of the master terminal device are representative and sent to the monitoring device of the master station.
以上説明したように本発明によれば、ハードウェア的に
は1系統の監視回線で済み、唯、両端からポーリング監
視を行なうことで回線断でも各中継器の監視を行なうこ
とができ、監視の冗長性をコストアップなしに実現する
ことができる。As explained above, according to the present invention, only one monitoring line is required in terms of hardware, and by polling monitoring from both ends, each repeater can be monitored even if the line is disconnected. Redundancy can be achieved without increasing costs.
第1図は本発明方式の説明図、
第2図は本発明の詳細な説明図、
第3図は従来方式の説明図である。
第1図でRは中継器、lは監視線、Mはマスタ、Sはス
レーブ、SSvはスレーブ監視装置である。FIG. 1 is an explanatory diagram of the method of the present invention, FIG. 2 is a detailed explanatory diagram of the present invention, and FIG. 3 is an explanatory diagram of the conventional method. In FIG. 1, R is a repeater, l is a monitoring line, M is a master, S is a slave, and SSv is a slave monitoring device.
Claims (1)
送路の一端の局(A)にマスタ端末装置を、他端の局(
B)にスレーブ端末装置を置き、 マスタ端末装置より各中継器の状態をポーリングで順次
取込み、またスレーブ端末装置を該ポーリングで呼び出
し、次にスレーブ端末装置より各中継器の状態をポーリ
ングで順次取込み、これらを繰り返し、 マスタ端末装置より呼び出されないときスレーブ端末装
置は監視装置(SSV)に割込みをかけ、マスタ、スレ
ーブ両端末装置のポーリング結果を取込ませることを特
徴とするマスタ/スレーブ切替方式。[Claims] A master terminal device is installed at a station (A) at one end of a transmission path in which a plurality of repeaters (R, R, . . .
Place a slave terminal device in B), and the master terminal device sequentially captures the status of each repeater by polling, calls the slave terminal device by polling, and then sequentially captures the status of each repeater from the slave terminal device by polling. , These are repeated, and when the slave terminal device is not called by the master terminal device, the slave terminal device interrupts the monitoring device (SSV) and causes the polling results of both the master and slave terminal devices to be fetched. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62120579A JPS63285041A (en) | 1987-05-18 | 1987-05-18 | Master/slave switching system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62120579A JPS63285041A (en) | 1987-05-18 | 1987-05-18 | Master/slave switching system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63285041A true JPS63285041A (en) | 1988-11-22 |
Family
ID=14789776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62120579A Pending JPS63285041A (en) | 1987-05-18 | 1987-05-18 | Master/slave switching system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63285041A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02250536A (en) * | 1989-03-24 | 1990-10-08 | Fujikura Ltd | Method for diagnosing trouble of on-vehicle network system |
JP2009225284A (en) * | 2008-03-18 | 2009-10-01 | Fujitsu Ltd | Line-monitoring apparatus and line-monitoring method |
JP2015198386A (en) * | 2014-04-02 | 2015-11-09 | Necフィールディング株式会社 | Fault detector, fault detection system, fault detection method and program |
-
1987
- 1987-05-18 JP JP62120579A patent/JPS63285041A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02250536A (en) * | 1989-03-24 | 1990-10-08 | Fujikura Ltd | Method for diagnosing trouble of on-vehicle network system |
JP2009225284A (en) * | 2008-03-18 | 2009-10-01 | Fujitsu Ltd | Line-monitoring apparatus and line-monitoring method |
JP2015198386A (en) * | 2014-04-02 | 2015-11-09 | Necフィールディング株式会社 | Fault detector, fault detection system, fault detection method and program |
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