JPS60106233A - Transmission line switching device - Google Patents
Transmission line switching deviceInfo
- Publication number
- JPS60106233A JPS60106233A JP21455583A JP21455583A JPS60106233A JP S60106233 A JPS60106233 A JP S60106233A JP 21455583 A JP21455583 A JP 21455583A JP 21455583 A JP21455583 A JP 21455583A JP S60106233 A JPS60106233 A JP S60106233A
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- switch
- signal
- switching
- station
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は複数の現用伝送路、の内の特定の現用伝送路を
予備伝送路に切替えるための伝送路切替装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmission line switching device for switching a specific working transmission line among a plurality of working transmission lines to a protection transmission line.
この種の切替において最も重要なことは伝送路の両端の
局にて、同一の現用伝送路を予備伝送路に切替えること
である。そのためには切替要求が発生した局（一般には
伝送路障害を検出した局）より対向局に対し、切替える
べき現用伝送路番号を誤りなく伝送しなければならない
。特に切替要求が発生していないにもかかわらず、対向
局にて切替信号と現用信号との偶然の一致等にて切替信
号を受信したと判定する様な墨があってはならない０
このような誤りを防ぐため、従来の伝送路切替装置では
、切替主動局より切替えるべき現用伝送路に伝送路符号
誤りを含んだ切替信号を送っている。これにより、現用
伝送路に通常流れている信号と切替信号とを区別するこ
とができ前述の誤った切替を行なうことを防いでいる。The most important thing in this type of switching is to switch the same working transmission line to a backup transmission line at both ends of the transmission line. To do this, the station that has issued the switching request (generally the station that has detected the transmission line failure) must transmit the current transmission line number to be switched to the opposite station without error. In particular, even though no switching request has occurred, there must not be any markings that would cause the opposite station to determine that it has received a switching signal due to a coincidence between the switching signal and the working signal. In order to prevent errors, in conventional transmission line switching devices, a switching active station sends a switching signal containing a transmission line code error to the working transmission line to be switched. This allows the switching signal to be distinguished from the signal normally flowing through the current transmission line, thereby preventing the above-mentioned erroneous switching.
伝送路がケーブルのときには、切替信号とじてバイポー
ラ符号が多く使用されている。このパイは「０」に対応
させるもので、ｒ＋ＩＪの後のｒｌＪは必ずｒ−ＩＪと
なるものであるから、この符号を使っている伝送路では
切替信号として符号誤りを含んだパターン例えばｒ＋ｘ
ｏ＋ｔｏ−１０−ＩＪの様なパターンを使用している。When the transmission path is a cable, bipolar codes are often used as switching signals. This pi corresponds to "0", and rlJ after r+IJ is always r-IJ, so in a transmission line using this code, a pattern containing a code error is used as a switching signal, for example r+x
A pattern like o+to-10-IJ is used.
従ってこのような切替信号は、切替信号が伝送路の途中
で変化せず、「＋１」はｒ＋ＩＪ ｒ−ＩＪは「−１」
として伝送される伝送路に対してのみ適用できる。無線
伝送路のように「＋１」も「−１」も同じ「１」として
伝送される伝送路を途中に含む伝送路に対しては適用不
可能である。Therefore, in such a switching signal, the switching signal does not change during the transmission path, and "+1" is r+IJ and r-IJ is "-1".
Applicable only to transmission lines where transmission is carried out as This method cannot be applied to a transmission path, such as a wireless transmission path, which includes a transmission path in which both "+1" and "-1" are transmitted as the same "1".
本発明の目的は上述の欠点を除去し、有線伝送路にも無
線伝送路にも適用可能な伝送路切替装置を提供すること
にある。An object of the present invention is to eliminate the above-mentioned drawbacks and provide a transmission line switching device that can be applied to both wired and wireless transmission lines.
本発明の伝送路切替装置は、現用伝送路と予備伝送路と
の間の切替えを行う伝送路切替装置において、伝送路の
異状を示す障害信号に応答して伝送路切替信号を発生す
る回路と、障害の生じた伝送路への信号送出を停止する
とともに前記切替信号を前記障害の発生した伝送路およ
び切替えるべき予備伝送路の双方に送出する信号切替回
路と、前記予備伝送路および障害伝送路からの切替信号
酸されたことを特徴とする。The transmission line switching device of the present invention is a transmission line switching device that switches between a working transmission line and a backup transmission line, and includes a circuit that generates a transmission line switching signal in response to a fault signal indicating an abnormality in the transmission line. , a signal switching circuit that stops sending a signal to a transmission line where a failure has occurred and sends the switching signal to both the transmission line where the failure has occurred and a backup transmission line to be switched; and the backup transmission line and the failure transmission line. It is characterized by the switching signal being acid.
次に本発明を図面を参照して詳細に説明する。Next, the present invention will be explained in detail with reference to the drawings.
第１図は、Ａ局とＢ局、これら両局間に設けられた現用
伝送路ｎ回線および予備伝送路１回線を有する通信シス
テムを示し、第２図は第１図の現用伝送路のうち１回線
分だけを取り出した場合の伝送路切替装置のブロック図
を示す。FIG. 1 shows a communication system having an A station and a B station, n working transmission lines and 1 backup transmission line installed between these two stations, and FIG. A block diagram of a transmission line switching device when only one line is taken out is shown.
第１図および第２図において、通常の状態では、端局装
置１９〜２４（回線１〜回線ｎ）の信号は伝送路切替装
置１７．１８を介して現用伝送路１〜６に接続されてい
る。今、伝送路２（回線１の下り方向）に障害があった
場合を考える。伝送路端末の終端装置９にて伝送路障害
が検出されるのでこれを伝送路切替装置１７に引込み、
切替情報５とする。伝送路切替装置１７の切替制御回路
３３けこの切替情報により伝送路切替回路３４に指令を
出し、端局１９を現用伝送路１．２から切離し予備伝送
路７．８に接続する０回時に送信信号切替回路２７．２
８にて、端局１９からの信号を止め、信号発生回路２５
．２６で作られる切替指令情報に゛切替え、切替える現
用伝送路１および予備伝送路７の画伝送路を介して相手
局に切替指令情報を送出する。相手局では、第２図と同
一構成を有する切替装置において、現用伝送路、予備伝
送路の双方の信号検出回路２９．３０が切替指令情報を
検出したとき、切替制御回路３３は伝送路切替回路３４
を動作させ現用から予備への伝送路切替を行う。In FIGS. 1 and 2, under normal conditions, signals from terminal devices 19 to 24 (lines 1 to n) are connected to working transmission lines 1 to 6 via transmission line switching devices 17 and 18. There is. Now, let us consider a case where there is a failure in transmission line 2 (downstream of line 1). Since a transmission line fault is detected at the termination device 9 of the transmission line terminal, this is pulled into the transmission line switching device 17,
The switching information is set to 5. The switching control circuit 33 of the transmission line switching device 17 sends a command to the transmission line switching circuit 34 based on the switching information, and transmits it at time 0 to disconnect the terminal station 19 from the working transmission line 1.2 and connect it to the backup transmission line 7.8. Signal switching circuit 27.2
At step 8, the signal from the terminal station 19 is stopped, and the signal generation circuit 25
．． 26, and sends the switching command information to the other station via the image transmission lines of the working transmission line 1 and the backup transmission line 7 to be switched. In the other station, in the switching device having the same configuration as that shown in FIG. 34
is operated to switch the transmission line from the active to the standby.
このとき切替指令情報のバタンは、現用伝送路。At this time, the switching command information is the current transmission line.
予備伝送路が同じバタンでも異なったバタンでもどちら
でもよい。切戻し時は、切替時と同様に自局を現用伝送
路に切戻すと同時に、相手局に対して現用伝送路、予備
伝送路の両方に信号発生回路から切戻し信号を送出し相
手局を切戻す。The backup transmission lines may be the same or different. When switching back, the local station is switched back to the working transmission line as in the case of switching, and at the same time, the signal generation circuit sends a switching back signal to both the working transmission line and the backup transmission line to the other station. Cut back.
以上のように、本発明によると現用伝送路および予備伝
、送路の双方に切替信号を送信するため、切替信号とし
て伝送路符号誤妙を含むものを使わなくてもよい。これ
は、２つの伝送路信号が同一になることが同時に発生す
ることは非常に稀であるためである。また、一般的には
予備伝送路には伝送路が正常かどうかの監視信号を常時
送っている。切替信号をこの監視信号と異ったものに選
べば、予備伝送路にて誤って切替信号と認識することは
ない。As described above, according to the present invention, since the switching signal is transmitted to both the working transmission line and the protection transmission line, it is not necessary to use a switching signal containing an error in the transmission line code. This is because it is extremely rare for two transmission line signals to become the same at the same time. Additionally, generally, a monitoring signal is constantly sent to the backup transmission line to check whether the transmission line is normal or not. If the switching signal is selected to be different from this monitoring signal, it will not be mistakenly recognized as a switching signal on the backup transmission line.
第１図は、現用伝送路ｎ回線（ｎは任意の整数）予備伝
送路１回線で構成された回線構成図、第２図は本発明の
一実施例を示すブロック図である。
第１図および第２図において、１・・・・・・現用伝送
路１（上り回線）、２・・・・・・現用伝送路１（下り
回線）、３・・・・・・現用伝送路２（上り回線）、４
・・・・・・現用伝送路２（下プ回線）、５・・・・・
・現用伝送路ｎ（上り回線）、６・・・・・・現用伝送
路ｈ（下り回線）、７・・・・・・予備伝送路（上り回
線）、８・・・・・・予備伝送路（下り回線）、９・・
・・・・現用伝送路終端装置１（Ａ局用）、１０・・・
・・・現用伝送路終端装置１（Ｂ局用）、１１・・・・
・・現用伝送路終端装置２（Ａ局用）、１２・・・・・
・現用伝送路終端装置２（Ｂ局用）、１３・・・・・・
現用伝送路終端装置ｎ（Ａ局用）、１４・・・・・・現
用伝送路終端装置ｎ（Ｂ局用）、１５・・・・・・予備
伝送路終端装置（Ａ局用）、１６・・・・・・予備伝送
路終端装置（Ｂ局用）、１７・・・・・・伝送路切替装
置（Ａ局用）、１８・・・・・・伝送路切替装置（Ｂ局
用）、１９・・・・・・端局装置１（Ａ局用）、２０・
・・・・・端局装置１（Ｂ局用）、２１・・・・・・端
局装置２（Ａ局用）、２２・・・・・・端局装置２（Ｂ
局用）、２３・・・・・・端局装置ｎ（Ａ局用）、２４
・・・・・・端局装置ｎ（Ｂ局用）、２５・・・・・・
発生回路（現用伝送路用）、２６・・・・・・発生回路
（予備伝送路用）、２７・・・・・・送出信号切替部（
現用伝送路用）、２８・・・・・・送出信号切替回路（
予備伝送路用）、２９・・・・・・検出回路（現用伝送
路用）、３０・・・・・・検出回路（予備伝送路用）、
３１・・・・・・障害検出回路（現用伝送路用）、３２
・・・・・・障害検出回路（予備伝送路用）、３３・・
・・・・切替制御回路、３４・・・・・・伝送路切替回
路。FIG. 1 is a line configuration diagram consisting of n working transmission lines (n is an arbitrary integer) and one protection transmission line, and FIG. 2 is a block diagram showing an embodiment of the present invention. In Figures 1 and 2, 1... Working transmission line 1 (up line), 2... Working transmission line 1 (down line), 3... Working transmission line Route 2 (uplink), 4
...... Working transmission line 2 (lower line), 5...
・Working transmission line n (uplink), 6... Working transmission line h (downlink), 7... Protection transmission line (uplink), 8... Protection transmission Road (down line), 9...
... Current transmission line termination device 1 (for A station), 10...
... Current transmission line termination device 1 (for B station), 11...
... Current transmission line termination device 2 (for A station), 12...
- Current transmission line termination device 2 (for B station), 13...
Working transmission line terminating device n (for A station), 14... Working transmission line terminating device n (for B station), 15... Backup transmission line terminating device (for A station), 16 ...... Backup transmission line termination device (for B station), 17... Transmission line switching device (for A station), 18... Transmission line switching device (for B station) , 19...Terminal device 1 (for A station), 20.
...Terminal station device 1 (for B station), 21...Terminal station device 2 (for A station), 22...Terminal station device 2 (for B station)
(for station), 23...terminal device n (for station A), 24
...Terminal device n (for B station), 25...
Generation circuit (for working transmission line), 26... Generation circuit (for backup transmission line), 27... Output signal switching unit (
(for current transmission line), 28... Outgoing signal switching circuit (
29... detection circuit (for working transmission line), 30... detection circuit (for protection transmission line),
31... Fault detection circuit (for current transmission line), 32
...Failure detection circuit (for backup transmission line), 33...
...Switching control circuit, 34...Transmission line switching circuit.
Claims (1)
替装置において、伝送路の異状を示す障害信号に応答し
て伝送路切替信号を発生する回路と、障害の生じた伝送
路への信号送出を停止するとともに前記切替信号を前記
障害の発生した伝送路および切替えるべき予備伝送路の
双方に送出する信号切替回路と、前記予備伝送路および
障害伝線切替回路とから構成されたことを特徴とする伝
送路切替装置。A transmission line switching device that switches between a working transmission line and a protection transmission line includes a circuit that generates a transmission line switching signal in response to a fault signal indicating an abnormality in the transmission line, and a circuit that generates a transmission line switching signal in response to a fault signal indicating an abnormality in the transmission line, and A signal switching circuit that stops signal transmission and sends the switching signal to both the transmission line where the fault has occurred and the backup transmission line to be switched, and the backup transmission line and faulty transmission line switching circuit. Characteristic transmission line switching device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21455583A JPS60106233A (en) | 1983-11-15 | 1983-11-15 | Transmission line switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21455583A JPS60106233A (en) | 1983-11-15 | 1983-11-15 | Transmission line switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60106233A true JPS60106233A (en) | 1985-06-11 |
| JPH0231535B2 JPH0231535B2 (en) | 1990-07-13 |
Family
ID=16657659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21455583A Granted JPS60106233A (en) | 1983-11-15 | 1983-11-15 | Transmission line switching device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60106233A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5373404A (en) * | 1989-05-22 | 1994-12-13 | Kabushki Kaisha Sankyo Seiki Seisakusho | Helical scan type rotary head drum unit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5877336A (en) * | 1981-11-04 | 1983-05-10 | Toshiba Corp | Line switching system in on-line system |
-
1983
- 1983-11-15 JP JP21455583A patent/JPS60106233A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5877336A (en) * | 1981-11-04 | 1983-05-10 | Toshiba Corp | Line switching system in on-line system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5373404A (en) * | 1989-05-22 | 1994-12-13 | Kabushki Kaisha Sankyo Seiki Seisakusho | Helical scan type rotary head drum unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0231535B2 (en) | 1990-07-13 |
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