JPH0425246A - Transmission line changeover system - Google Patents
Transmission line changeover systemInfo
- Publication number
- JPH0425246A JPH0425246A JP12981090A JP12981090A JPH0425246A JP H0425246 A JPH0425246 A JP H0425246A JP 12981090 A JP12981090 A JP 12981090A JP 12981090 A JP12981090 A JP 12981090A JP H0425246 A JPH0425246 A JP H0425246A
- Authority
- JP
- Japan
- Prior art keywords
- distortion
- information
- line
- changeover
- voltage
- 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
- 230000005540 biological transmission Effects 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 claims description 5
- 230000006866 deterioration Effects 0.000 abstract description 10
- 230000003044 adaptive effect Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は伝送路切替方式に関し、特に１対Ｎ（Ｎは整数
）の予備とＮ個の現用通信回線との切替方式において、
切替の基準となる回線品質監視信号および制御方式を改
良した伝送路切替方式に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a transmission line switching system, and particularly in a switching system between 1:N (N is an integer) backup and N working communication lines.
This invention relates to a transmission line switching system that improves the line quality monitoring signal and control system that serve as the basis for switching.
従来、この種の伝送路切替方式は現用回線および予備回
線の両端局に設けられた回線品質監視信号であるビット
誤り率（以下ＢＥＲという）を監視して、あるしきい値
まで劣化した場合に両端局に設けられた送信端切替器と
受信端切替器を制御して現用回線から予備回線への切替
えを行っていた。Conventionally, this type of transmission line switching system monitors the bit error rate (hereinafter referred to as BER), which is a line quality monitoring signal provided at both end stations of the working line and the protection line, and detects when the bit error rate (BER) has deteriorated to a certain threshold. Switching from the working line to the protection line was performed by controlling the transmitting end switch and receiving end switch installed at both terminal stations.
上述した従来の伝送路切替方式は、切替制御の情報とし
てＢＥＲ劣化の基準値を用いている。The conventional transmission line switching method described above uses a reference value of BER deterioration as information for switching control.
しかしながら、伝送路の劣化がただちにＢＥＲ情報には
あられれず伝送歪の劣化が始まり、その次にＢＥＲの劣
化が生ずる形態の回線劣化がある。However, there is a type of line deterioration in which the deterioration of the transmission path is not immediately reflected in the BER information, and the deterioration of transmission distortion begins, and then the deterioration of the BER occurs.
この対策として適応形自動等化器を備えて伝送歪を改善
した装置があるが、回線切替はＢＥＨの劣化により行っ
ているので、伝送歪の劣化を含んだ回線品質監視による
切替えを行っていない欠点があった。As a countermeasure to this problem, there is a device equipped with an adaptive automatic equalizer to improve transmission distortion, but since line switching is performed based on BEH deterioration, switching is not performed by monitoring line quality that includes deterioration of transmission distortion. There were drawbacks.
本発明の伝送路切替方式は、予備回線と複数個の現用回
線とを両端の端局で切替える送信端切替器と受信端切替
器とを有し、受端側のビットエラーレートの情報を入力
する切替制御部により回線切替えを行う伝送路切替方式
において、受端側に設けられている自動等化器の等化量
を定める歪み情報を前記切替制御部に入力して前記ビッ
トエラーレート情報と前記歪み情報との２つの情報のう
ちあらかじめ定められたしきい値に早く達した情報によ
り回線切替要求信号を出力することを特徴とする。The transmission line switching system of the present invention has a transmitting end switch and a receiving end switch that switch between a protection line and a plurality of working lines at terminal stations at both ends, and inputs information on the bit error rate on the receiving end. In a transmission line switching method in which line switching is performed by a switching control unit, distortion information that determines the equalization amount of an automatic equalizer provided on the receiving end side is input to the switching control unit, and the bit error rate information and the bit error rate information are input to the switching control unit. It is characterized in that a line switching request signal is output based on the information that reaches a predetermined threshold earlier than the above-mentioned distortion information.
次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例の構成図である。FIG. 1 is a block diagram of an embodiment of the present invention.
第１図の実施例は、Ｎルートの現用回線２２と１ルート
の予備回線２１から回線が構成されている。また、予備
回線２１．現用回線２２は、それぞれ送信端切替器ＩＡ
、ＩＢ〜ＩＮ、送信符号処理部２Ａ、２Ｂ〜２Ｎ、変調
部３Ａ、３Ｂ〜３Ｎ、送信部４Ａ、４Ｂ〜４Ｎ、受信部
５Ａ。In the embodiment shown in FIG. 1, the line is composed of N routes of working lines 22 and one route of protection line 21. In addition, the backup line 21. The working lines 22 each have a transmission end switch IA.
, IB to IN, transmission code processing sections 2A, 2B to 2N, modulation sections 3A, 3B to 3N, transmission sections 4A, 4B to 4N, and reception section 5A.
５Ｂ〜５Ｎ、自動等化器６Ａ、６Ｂ〜６Ｎ、復調部７Ａ
、７Ｂ〜７Ｎ、受信符号処理部８Ａ、８Ｂ〜８Ｎ、受信
端切替器９Ａ、９Ｂ〜９Ｎ、パイロット信号発生器１０
、パイロット信号検出器１１、切替制御部１２から構成
されている。5B to 5N, automatic equalizer 6A, 6B to 6N, demodulator 7A
, 7B to 7N, reception code processing units 8A, 8B to 8N, reception end switching units 9A, 9B to 9N, pilot signal generator 10
, a pilot signal detector 11, and a switching control section 12.
まず、伝送路が正常であるときは予備回線２１にはパイ
ロット信号発生器１０のパイロット信号が伝送されてお
り、受端側のパイロット信号検出器１１により、パイロ
ット信号が検出される。First, when the transmission path is normal, a pilot signal from the pilot signal generator 10 is transmitted to the protection line 21, and the pilot signal is detected by the pilot signal detector 11 on the receiving end side.
一方現用回線２２の伝送路の伝搬歪等の歪を自動等化器
６Ｂ〜６Ｎにより等化する。On the other hand, distortions such as propagation distortion of the transmission line of the working line 22 are equalized by automatic equalizers 6B to 6N.
この歪にはＬ Ａ Ｄ （Ｌｉｎｅａｒ Ａｍｐｌｉｔ
ｕｄｅ Ｄｉｓｔｏｒ−ｔｉｏｎ）とＱ Ａ Ｄ （Ｑ
ｕａｄｒａｔｕｒｅ Ａｍｐｌｉｔｕｄｅ Ｄｉｓｔｏ
ｒ−ｔｉｏｎ）の２種類があり、いわゆる１次歪、２次
歪の量を検出して、このＬＡＤ電圧、ＱＡＤ電圧により
適応形の自動等化器の等化動作を行っている。さらに、
このＬＡＤ電圧とＱＡＤ電圧の歪み情報１３と従来から
設けられていたＢＥＲ情報１４とが切替制御部１２に入
力される。For this distortion, L A D (Linear Amplifier)
ude Distor-tion) and Q A D (Q
uadrature Amplitude Disto
There are two types (r-tion), and the amounts of so-called first-order distortion and second-order distortion are detected, and the equalization operation of an adaptive automatic equalizer is performed using the LAD voltage and QAD voltage. moreover,
The distortion information 13 of the LAD voltage and QAD voltage and the conventionally provided BER information 14 are input to the switching control section 12.
切替制御部１２には回線品質の下限を示すあるしきい値
を設けて、前述の歪み情報１３とＢＥＲ情報１４のいず
れか一方がしきい値に達すると回線切替要求信号１５を
送信端切替器ＩＢ〜ｌＮおよび受信端切替器９Ｂ〜９Ｎ
に送出する。The switching control unit 12 is provided with a certain threshold indicating the lower limit of line quality, and when either the distortion information 13 or the BER information 14 reaches the threshold, the line switching request signal 15 is sent to the transmitting end switch. IB~IN and receiving end switch 9B~9N
Send to.
切替要求のあった現用回線、例えば現用１は、送信端切
替器ＩＢおよび受信端切替器９Ｂを予備回線２１に切替
えている。The working line for which a switching request has been made, for example, working line 1, has its transmitting end switch IB and receiving end switch 9B switched to the protection line 21.
以上説明したように本発明は、自動等化器に使用される
ＬＡＤ電圧とＱＡＤ電圧の歪み情報を回線切替えの情報
として加えることにより、伝送路の劣化を早期に検出し
て、回線切替えを行い、回線品質の劣化を早期に救済で
きる効果がある。As explained above, the present invention adds distortion information of the LAD voltage and QAD voltage used in the automatic equalizer as line switching information, thereby detecting deterioration of the transmission line at an early stage and switching the line. This has the effect of quickly resolving deterioration in line quality.
第１図は本発明の一実施例の構成図である。
ＬＡ、ＩＢ〜ＩＮ・・・送信端切替器、２Ａ、２Ｂ〜２
Ｎ・・・送信符号処理部、３Ａ、３Ｂ〜３Ｎ・・・変調
部、４Ａ、４Ｂ〜４Ｎ・・・送信部、５Ａ ５Ｂ〜５
Ｎ・・・受信部、６Ａ、６Ｂ〜６Ｎ・・・自動等化器、
７Ａ、７Ｂ〜７Ｎ・・・復調部、８Ａ、８Ｂ〜８Ｎ・・
・受信符号処理部、９Ａ、９Ｂ〜９Ｎ・・・受信端切替
器、１０・・・パイロット信号発生器、１１・・・パイ
ロット信号検出器、１２・・・切替制御部、１３・・・
歪み情報、１４・・・ＢＥＲ情報、１５・・・回線切替
要求信号、２１・・・予備回線、２２・・・現用回線。FIG. 1 is a block diagram of an embodiment of the present invention. LA, IB~IN...Transmission end switch, 2A, 2B~2
N... Transmission code processing section, 3A, 3B to 3N... Modulation section, 4A, 4B to 4N... Transmission section, 5A 5B to 5
N...Receiving section, 6A, 6B to 6N...Automatic equalizer,
7A, 7B to 7N... demodulation section, 8A, 8B to 8N...
- Reception code processing unit, 9A, 9B to 9N...Reception end switcher, 10...Pilot signal generator, 11...Pilot signal detector, 12...Switching control unit, 13...
Distortion information, 14...BER information, 15...Line switching request signal, 21...Protection line, 22...Working line.
Claims (1)
える送信端切替器と受信端切替器とを有し、受端側のビ
ットエラーレートの情報を入力する切替制御部により回
線切替えを行う伝送路切替方式において、受端側に設け
られている自動等化器の等化量を定める歪み情報を前記
切替制御部に入力して前記ビットエラーレート情報と前
記歪み情報との２つの情報のうちあらかじめ定められた
しきい値に早く達した情報により回線切替要求信号を出
力することを特徴とする伝送路切替方式。 ２、前記自動等化器の等化量を定める歪み情報がリニア
・アンプリテュード・ディストーションとクォドレィチ
ャー・アンプリテュード・ディストーションとの二つの
歪み電圧の情報からなることを特徴とする請求項１記載
の伝送路切替方式。[Claims] 1. It has a transmitting end switch and a receiving end switch that switch between a protection line and a plurality of working lines at terminal stations at both ends, and inputs information on the bit error rate on the receiving end. In a transmission line switching method in which a switching control unit performs line switching, distortion information that determines the equalization amount of an automatic equalizer provided on the receiving end side is input to the switching control unit, and the bit error rate information and the A transmission line switching method characterized in that a line switching request signal is output based on information that quickly reaches a predetermined threshold value among two pieces of information, including distortion information. 2. According to claim 1, the distortion information that determines the equalization amount of the automatic equalizer consists of information on two distortion voltages, linear amplitude distortion and quadrature amplitude distortion. Transmission path switching method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12981090A JPH0425246A (en) | 1990-05-18 | 1990-05-18 | Transmission line changeover system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12981090A JPH0425246A (en) | 1990-05-18 | 1990-05-18 | Transmission line changeover system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0425246A true JPH0425246A (en) | 1992-01-29 |
Family
ID=15018785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12981090A Pending JPH0425246A (en) | 1990-05-18 | 1990-05-18 | Transmission line changeover system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0425246A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6279158B1 (en) | 1994-09-26 | 2001-08-21 | Adc Telecommunications, Inc. | Dynamic bandwidth allocation |
-
1990
- 1990-05-18 JP JP12981090A patent/JPH0425246A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6279158B1 (en) | 1994-09-26 | 2001-08-21 | Adc Telecommunications, Inc. | Dynamic bandwidth allocation |
| US7123592B2 (en) | 1994-09-26 | 2006-10-17 | Adc Telecommunications, Inc. | Dynamic allocation of transmission bandwidth in a communication system |
| US7069577B2 (en) | 1995-02-06 | 2006-06-27 | Sdc Telecommunications, Inc. | Dynamic bandwidth allocation |
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