JPH0614005A - Active standby changeover device - Google Patents
Active standby changeover deviceInfo
- Publication number
- JPH0614005A JPH0614005A JP16636492A JP16636492A JPH0614005A JP H0614005 A JPH0614005 A JP H0614005A JP 16636492 A JP16636492 A JP 16636492A JP 16636492 A JP16636492 A JP 16636492A JP H0614005 A JPH0614005 A JP H0614005A
- Authority
- JP
- Japan
- Prior art keywords
- line
- circuit
- working
- digital signal
- polarization
- 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
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Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複数の現用回線に対し
て予備回線を有し、交差偏波干渉除去回路（ＸＰＩＣ：
Ｃｒｏｓｓ Ｐｏｌａｒｉｚａｔｉｏｎ Ｉｎｔｅｒｆ
ｅｒｅｎｃｅＣａｎｃｅｌｌｅｒ）を用いて同一周波数
に対しＶ偏波およびＨ偏波の両偏波を使用するデジタル
信号無線伝送に利用する。本発明は、選択性フェージン
グ発生時の現用と予備回線間との切り替えを行う切替制
御回路を一つに集約することができるデジタル信号伝送
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a protection line for a plurality of working lines and has a cross polarization interference canceling circuit (XPIC:
Cross Polarization Interf
erenceCanceler) is used for digital signal wireless transmission using both polarizations of V polarization and H polarization for the same frequency. The present invention relates to a digital signal transmission device capable of integrating a switching control circuit for switching between a working line and a protection line when selective fading occurs.
【０００２】[0002]
【従来の技術】ＸＰＩＣは、伝送路で生じる異偏波間の
干渉を受信側でその元信号を用いて削除しようとするも
ので、Ｖ偏波、Ｈ偏波両方を同一周波数で用いることに
より周波数の有効利用を計ることができる。一般に無線
周波数配置はＸＰＩＣを用いない場合、図３−ａあるい
は図３−ｂに示すインターリーブ周波数配置をとる。シ
ステム構成は、現用回線Ｎ（Ｎは任意の整数）に対して
予備回線１本を持ち、一般に以下に説明する方式により
現用予備切替えを行っている。2. Description of the Related Art XPIC attempts to eliminate interference between different polarizations occurring in a transmission line by using the original signal on the receiving side. By using both V polarization and H polarization at the same frequency, The effective use of can be measured. Generally, when XPIC is not used for the radio frequency allocation, the interleaved frequency allocation shown in FIG. 3A or FIG. 3B is adopted. The system configuration has one protection line for the work line N (N is an arbitrary integer), and generally, the work protection switching is performed by the method described below.
【０００３】回線品質検出方法として、パリティーパル
ス、あるいは、シンドロームパルスを用いてＢＥＲ（ビ
ット誤り率）を求める方法が用いられ、ある特定の現用
回線の受端端局で、予め定められたＢＥＲより悪いＢＥ
Ｒを検出すると回線障害アラームを発動する。そのとき
予備回線が、他の現用回線に用いられていない上にしか
もＢＥＲが予め定められた値よりも低い場合、回線障害
アラームを発動した現用回線は予備回線へ切り替えられ
る。As a line quality detecting method, a method of obtaining a BER (bit error rate) using a parity pulse or a syndrome pulse is used, and a receiving end station of a certain working line uses a predetermined BER. Bad BE
When R is detected, a line fault alarm is activated. At that time, if the protection line is not used for another working line and the BER is lower than a predetermined value, the working line that has issued the line failure alarm is switched to the protection line.
【０００４】ＸＰＩＣを用いて同一周波数をＶ偏波、Ｈ
偏波両方で使用する場合、図３−ａ、図３−ｂで示され
るシステムにＸＰＩＣを追加し、図３−ｃに示す周波数
配置をとるが、現用予備切替はシステムＡ、システムＢ
それぞれ独立に行われていたため、回線切替制御回路を
システムそれぞれが備えていた。Using XPIC, the same frequency is V-polarized, H-polarized
When used in both polarizations, XPIC is added to the system shown in FIGS. 3-a and 3-b, and the frequency arrangement shown in FIG. 3-c is adopted.
Each system had its own line switching control circuit because they were performed independently.
【０００５】例として図２に示す現用回線２本および予
備回線１本を持つ装置を２組用いてシステムＡのデジタ
ル信号１、デジタル信号２、およびシステムＢのデジタ
ル信号１、デジタル信号２を伝送する場合の従来の回線
切り替え方式について説明する。As an example, the digital signal 1 and the digital signal 2 of the system A and the digital signal 1 and the digital signal 2 of the system B are transmitted by using two sets each having two working lines and one protection line shown in FIG. A conventional line switching method in the case of performing will be described.
【０００６】システムＡの予備受信回路（１）２０５は
システムＢの予備受信回路（１）３０５から出力され１
ｂを通して送られるデジタル信号を用いて伝送路で生じ
る異偏波間の干渉を削除する。逆にシステムＢの予備受
信回路（１）３５０はシステムＡの予備受信回路（１）
２０５から出力され１ａを通して送られるデジタル信号
を用いて伝送路で生じる異偏波間の干渉を削除する。The standby receiver circuit (1) 205 of the system A outputs 1 from the standby receiver circuit (1) 305 of the system B.
Using the digital signal sent through b, the interference between different polarizations that occurs in the transmission line is eliminated. On the contrary, the standby receiver circuit (1) 350 of the system B is the standby receiver circuit (1) of the system A.
By using the digital signal output from 205 and sent through 1a, interference between different polarizations generated in the transmission path is eliminated.
【０００７】同様にシステムＡの現用受信回路（１）２
０６はシステムＢの現用受信回路（１）３０６から出力
され２ｂを通して送られるデジタル信号を用いて伝送路
で生じる異偏波間の干渉を削除する。逆にシステムＢの
現用受信回路（１）３０６はシステムＡの現用受信回路
（１）２０６から出力され２ａを通して送られるデジタ
ル信号を用いて伝送路で生じる異偏波間の干渉を削除す
る。Similarly, the working receiver circuit (1) 2 of system A
Reference numeral 06 eliminates interference between different polarizations generated in the transmission line by using the digital signal output from the active reception circuit (1) 306 of the system B and transmitted through 2b. On the contrary, the working receiver circuit (1) 306 of the system B cancels the interference between different polarizations generated in the transmission line by using the digital signal output from the working receiver circuit (1) 206 of the system A and sent through 2a.
【０００８】また、システムＡの現用受信回路（２）２
０７はシステムＢの現用受信回路（２）３０７から出力
され３ｂを通して送られるデジタル信号を用いて伝送路
で生じる異偏波間の干渉を削除する。逆にシステムＢの
現用受信回路（２）３０７はシステムＡの現用受信回路
（２）２０７から出力され３ａを通して送られるデジタ
ル信号を用いて伝送路で生じる異偏波間の干渉を削除す
る。The working receiver circuit (2) 2 of system A
Reference numeral 07 eliminates interference between different polarizations generated in the transmission line by using the digital signal output from the current receiving circuit (2) 307 of the system B and sent through 3b. On the contrary, the working receiver circuit (2) 307 of the system B cancels the interference between different polarizations generated in the transmission line by using the digital signal output from the working receiver circuit (2) 207 of the system A and sent through 3a.
【０００９】この伝送装置は、各システム毎に受信側で
ＢＥＲに依り回線品質を常に監視しながらＢＥＲが予め
定められた値より悪い場合、言い替えれば回線品質が規
定の値よりも劣化した場合、現用から予備へ回線を切り
替える。In this transmission apparatus, if the BER is worse than a predetermined value while the channel quality is constantly monitored by the receiving side for each system, in other words, if the line quality deteriorates below a prescribed value, Switch the line from working to protection.
【００１０】仮にシステムＡの現用送信回路（１）２０
３および現用受信回路（１）２０６からなる現用回線１
でフェージングが起こり回線品質が劣化した場合につい
て説明する。一般にフェージングは、Ｖ偏波、Ｈ偏波の
両方に高い相関を持って発生することから、システムＢ
の現用送信回路（１）３０３および現用受信回路（１）
３０６からなる現用回線１でもフェージングが起こり回
線品質が劣化すると考えられる。Temporarily, the active transmission circuit (1) 20 of system A
Working line 1 consisting of 3 and working receiving circuit (1) 206
The case where fading occurs and the line quality deteriorates will be described. In general, fading occurs with high correlation in both V polarization and H polarization, so system B
Working transmitting circuit (1) 303 and working receiving circuit (1) of
It is conceivable that fading will occur even in the working line 1 composed of 306 and the line quality will deteriorate.
【００１１】受信端局では、システムＡの現用受信回路
（１）２０６でＢＥＲを検出した後、そのＢＥＲの値を
予め定められたＢＥＲの値と比較し劣化が確認されれば
回線障害アラームを発動する。発生した回線障害アラー
ムは２４を通って回線切替制御回路２０９に送られる。
このとき同様に現用送信回路（２）２０４および現用受
信回路（２）２０７からなる現用回線２あるいは予備送
信回路２０２および予備受信回路２０５からなる予備回
線においてもそれぞれＢＥＲの値を予め定められたＢＥ
Ｒの値と比較し、劣化していないことを確認したときに
は回線障害アラームの送出は行わない。In the receiving terminal station, after detecting the BER by the active receiving circuit (1) 206 of the system A, the BER value is compared with a predetermined BER value, and if a deterioration is confirmed, a line fault alarm is issued. Activate. The generated line fault alarm is sent to the line switching control circuit 209 through 24.
At this time, similarly, the BE for which the BER value is set in advance is also set in the working line 2 including the working transmitting circuit (2) 204 and the working receiving circuit (2) 207 or the protection line including the standby transmitting circuit 202 and the standby receiving circuit 205.
When it is confirmed that there is no deterioration by comparing with the value of R, the line fault alarm is not sent.
【００１２】回線切替制御回路２０９では予備受信回路
（１）２０５および現用受信回路（２）２０７より回線
障害アラームを受信しないことで現用回線２が予備回線
を占有していないことを確認するとともに、予備回線で
回線障害が起きていないことを確認する。このとき、予
備回線に回線障害アラームがでていなければ回線切替制
御回路２０９は送端回線切替回路２０１へ制御信号を送
り、送端回線切替回路２０１に切り替えて現用回線１に
より伝送されていたデジタル信号１を予備回線へも伝送
する。The line switching control circuit 209 confirms that the working line 2 does not occupy the protection line by not receiving a line failure alarm from the protection receiving circuit (1) 205 and the working receiving circuit (2) 207. Make sure that there is no line failure on the protection line. At this time, if there is no line failure alarm on the protection line, the line switching control circuit 209 sends a control signal to the sending end line switching circuit 201 to switch to the sending end line switching circuit 201, and the digital signal transmitted by the working line 1 is transmitted. The signal 1 is also transmitted to the protection line.
【００１３】次に、回線切替制御回路２０９は受端回線
切替回路２０８へ制御信号を送り受端回線切替回路２０
８を切り替えて現用受信回路（１）２０６から出力され
るデジタル信号に代わって予備受信回路（１）２０５か
ら出力されるデジタル信号をデジタル信号１として受端
回線切替回路２０８より出力させる。これにより現用回
線１によって伝送されていたデジタル信号１の予備回線
への切り替えが終了する。Next, the line switching control circuit 209 sends a control signal to the receiving end line switching circuit 208 and the receiving end line switching circuit 20.
8 is switched to cause the receiving end line switching circuit 208 to output the digital signal output from the standby receiving circuit (1) 205 instead of the digital signal output from the active receiving circuit (1) 206 as the digital signal 1. This completes the switching of the digital signal 1 transmitted by the working line 1 to the protection line.
【００１４】システムＢにおいてもシステムＡとは独立
に現用受信回路（１）３０６でＢＥＲを検出した後、そ
のＢＥＲの値を予め定められたＢＥＲの値と比較し劣化
が確認されれば回線障害アラームを発動する。発生した
回線障害アラームは３４を通って回線切替制御回路３０
９に送られる。このとき同様に現用送信回路（２）３０
４および現用受信回路（２）３０７からなる現用回線
２、あるいは予備送信回路（１）３０２および予備受信
回路（１）３０５からなる予備回線においてもそれぞれ
ＢＥＲの値を予め定められたＢＥＲの値と比較し劣化し
ていないことを確認したときには回線障害アラームを発
動しない。In the system B, after the BER is detected by the working receiving circuit (1) 306 independently of the system A, the BER value is compared with a predetermined BER value, and if a deterioration is confirmed, a line fault occurs. Trigger an alarm. The generated line fault alarm passes through the line switching control circuit 30.
Sent to 9. At this time, similarly, the active transmission circuit (2) 30
4 and the working line 2 including the working receiving circuit (2) 307, or the protection line including the protection transmitting circuit (1) 302 and the protection receiving circuit (1) 305, respectively, the BER value is set to a predetermined BER value. When comparing and confirming that there is no deterioration, the line fault alarm is not activated.
【００１５】回線切替制御回路３０９では予備受信回路
（１）３０５、および現用受信回路（２）３０７より回
線障害アラームを受信しないことで現用回線２が予備回
線を占有していないことを確認するとともに、予備回線
で回線障害が起きていないことを確認する。このとき、
予備回線に回線障害アラームがでていなければ回線切替
制御回路３０９は送端回線切替回路３０１へ制御信号を
送り、送端回線切替回路３０１を切り替えて現用回線１
により伝送されていたデジタル信号１を予備回線へも伝
送する。The line switching control circuit 309 confirms that the working line 2 does not occupy the protection line by not receiving a line failure alarm from the protection receiving circuit (1) 305 and the working receiving circuit (2) 307. , Check that there is no line failure on the protection line. At this time,
If no line fault alarm is issued on the protection line, the line switching control circuit 309 sends a control signal to the transmission line switching circuit 301 to switch the transmission line switching circuit 301 to switch the working line 1
The digital signal 1 transmitted by the above is also transmitted to the protection line.
【００１６】次に、回線切替制御回路３０９は受端回線
切替回路３０８へ制御信号を送り、受端回線切替回路３
０８を切り替えて現用受信回路（１）３０６から出力さ
れるデジタル信号に代わって予備受信回路（１）３０５
から出力されるデジタル信号をデジタル信号１として受
端回線切替回路３０８より出力させる。これにより現用
回線１によって伝送されていたデジタル信号１の予備回
線への切り替えが終了する。Next, the line switching control circuit 309 sends a control signal to the receiving end line switching circuit 308, and the receiving end line switching circuit 3
08, and the spare reception circuit (1) 305 is used instead of the digital signal output from the current reception circuit (1) 306.
The digital signal output from the receiving end line switching circuit 308 is output as the digital signal 1. This completes the switching of the digital signal 1 transmitted by the working line 1 to the protection line.
【００１７】[0017]
【発明が解決しようとする課題】しかしながら一般にフ
ェージングはＶ偏波、Ｈ偏波の両方に高い相関を持って
発生するにもかかわらず、従来方式によりシステムＡお
よびシステムＢをそれぞれ独立に切り替えるには、回線
切替制御回路がそれぞれに必要であり、不要なコストア
ップを招き経済性に欠ける問題がある。However, in general, although fading occurs with a high correlation in both the V polarization and the H polarization, it is necessary to switch between system A and system B independently by the conventional method. However, the line switching control circuit is required for each of them, resulting in unnecessary cost increase and lack of economy.
【００１８】[0018]
【課題を解決するための手段】本発明は、複数の現用回
線に対して少数の予備回線を有し、しかも交差偏波干渉
除去回路を用いて同一周波数に対しＶ偏波およびＨ偏波
の両偏波を使用するデジタル信号無線伝送路に挿入され
た現用予備切替装置において、異偏波同一周波数の少な
くとも一つの受信出力が予め定められた回線品質を下回
った場合にその異偏波同一周波数の伝送路の全部に切替
制御信号を送出する回線切替制御回路を備えたことを特
徴とする。SUMMARY OF THE INVENTION The present invention has a small number of protection lines for a plurality of working lines, and uses a cross polarization interference cancellation circuit for V polarization and H polarization for the same frequency. In the active standby switching device inserted in the digital signal wireless transmission line using both polarizations, if at least one received output of the same polarization of the different polarization falls below the predetermined line quality, the same polarization of the different polarization Is provided with a line switching control circuit for sending a switching control signal to all of the transmission lines.
【００１９】[0019]
【作用】異偏波同一周波数の信号を受信する各受信回路
からの出力の少なくとも一つが予め定められた回線品質
を下回ったときに、回線障害警報を出力し、この警報回
路からの回線障害警報により回線切替制御回路が同一周
波数のＶ偏波およびＨ偏波を用いる回線を一組として同
時に切り替える。これにより回線切替制御回路を一つに
集約することができる。[Function] When at least one of the outputs from each receiving circuit that receives signals of different polarizations and the same frequency falls below a predetermined line quality, a line fault alarm is output and the line fault alarm from this alarm circuit is output. The line switching control circuit simultaneously switches a pair of lines using the V polarization and the H polarization of the same frequency. As a result, the line switching control circuits can be integrated into one.
【００２０】[0020]
【実施例】次に、本発明実施例を図面に基づいて説明す
る。図１は本発明実施例の構成を示すブロック図であ
る。Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the embodiment of the present invention.
【００２１】本発明実施例は、複数の現用回線および一
つの予備回線を有し、同一周波数に対しＶ偏波およびＨ
偏波によりデジタル信号無線伝送を行う複数のシステム
ＡおよびＢを備え、複数のシステムＡおよびＢそれぞれ
に、回線切替制御にしたがって複数の現用回線の中から
予備回線への回線切り替えを行う送端回線切替回路１０
１、１０２と、この送端回線切替回路１０１、１０２の
出力にそれぞれ接続されその伝送路に送出できる信号に
変調する手段、および回線品質を受端局にて検出するた
めの情報を付加する手段を有する複数の現用送信回路
（１）１０４、１０７、（Ｎ）１０５、１０８および一
つの予備送信回路（１）１０３、１０６と、これらの送
信回路に通信回線を介してそれぞれ接続され、受端局の
ときに送信された信号を復調する手段、回線品質を検出
する手段、および交差偏波干渉除去回路を有する複数の
現用受信回路（１）１１０、１１３、（Ｎ）１１１、１
１４および一つの予備受信回路（１）１０９、１１２
と、これらの受信回路に接続され回線切替制御にしたが
って出力される切替信号を複数の回線に出力する受端回
線切替回路１１５、１１６とを含み、さらに、本発明の
特徴として、複数のシステムＡおよびＢの異偏波同一周
波数の前記各受信回路の出力にそれぞれ接続され、少な
くとも一つのシステムＡまたはＢがあらかじめ定められ
た回線品質を下回ったときに回線障害警報を出力する警
報回路１１８、１１９、１２０と、異偏波同一周波数の
少なくとも一つの受信出力が予め定められた回線品質を
下回った場合に異偏波同一周波数の伝送路の全部に切替
制御信号を送出する回線切替制御回路１１７とを備え
る。The embodiment of the present invention has a plurality of working lines and one protection line, and V polarization and H for the same frequency.
A transmission line that includes a plurality of systems A and B that perform digital signal wireless transmission using polarized waves, and that switches a line from a plurality of working lines to a protection line according to the line switching control for each of the systems A and B. Switching circuit 10
1, 102, means for modulating the signals which are respectively connected to the outputs of the transmission line switching circuits 101, 102 and which can be transmitted to the transmission line, and means for adding information for detecting the line quality at the receiving end station. A plurality of working transmission circuits (1) 104, 107, (N) 105, 108 and one spare transmission circuit (1) 103, 106, and these receiving circuits are respectively connected via communication lines A plurality of working receiving circuits (1) 110, 113, (N) 111, 1 having means for demodulating a signal transmitted at the time of station, means for detecting line quality, and cross polarization interference cancellation circuit.
14 and one spare receiving circuit (1) 109, 112
And receiving-end line switching circuits 115 and 116 which are connected to these receiving circuits and output switching signals output under a line switching control to a plurality of lines. Further, as a feature of the present invention, a plurality of system A Alarm circuits 118 and 119, which are connected to the outputs of the respective reception circuits of different polarizations of B and B, respectively, and output a line failure alarm when at least one system A or B falls below a predetermined line quality. , 120, and a line switching control circuit 117 for sending a switching control signal to all of the transmission lines of different polarization and same frequency when at least one received output of different polarization and same frequency is lower than a predetermined line quality. Equipped with.
【００２２】次に、このように構成された本発明実施例
の動作について説明する。Next, the operation of the embodiment of the present invention thus constructed will be described.
【００２３】システムＡ、Ｂそれぞれに対して、送端回
線切替回路１０１、１０２は回線切替制御回路１１７に
よりＮ本の現用回線を用いて伝送されているＮ本のデジ
タル信号の中から回線障害を起こしているデジタル信号
を予備回線に送出する。予備送信回路（１）１０３、１
０６は送端回線切替回路１０１、１０２の予備回線出力
に接続されデジタル信号を変調し、回線品質を受端局に
て検出するための情報を付加する。現用送信回路（１）
１０４、１０７および現用送信回路（Ｎ）１０５、１０
８は送端回線切替回路１０１、１０２のＮ本の現用回線
出力にそれぞれ接続されるＮ個の現用送信回路の中の二
つでデジタル信号を変調し、回線品質を受端局にて検出
するための情報を付加する。For each of the systems A and B, the transmission end line switching circuits 101 and 102 cause a line fault from the N digital signals transmitted by the line switching control circuit 117 using the N working lines. The digital signal that is awake is sent to the protection line. Backup transmission circuit (1) 103, 1
Reference numeral 06 is connected to the protection line outputs of the transmission line switching circuits 101 and 102, modulates a digital signal, and adds information for detecting the line quality at the receiving end station. Working transmission circuit (1)
104, 107 and working transmission circuit (N) 105, 10
Reference numeral 8 modulates a digital signal by two of the N working transmission circuits connected to the N working line outputs of the transmission line switching circuits 101 and 102, and the line quality is detected at the receiving end station. Information is added.
【００２４】予備受信回路（１）１０９、１１２は、予
備送信回路（１）１０３、１０６と通信回線を通して接
続され、送られてきた信号を元のデジタル信号に復調し
て回線品質を検出し、予備受信回路（１）１０９は予備
受信回路（１）１１２から出力され１ｂを通して送られ
るデジタル信号を用いて伝送路で生じる異偏波間の干渉
を削除する。逆に予備受信回路（１）１１２は予備受信
回路（１）１０９から出力され１ａを通して送られるデ
ジタル信号を用いて伝送路で生じる異偏波間の干渉を削
除する。現用受信回路（１）１１０、１１３および現用
受信回路（Ｎ）１１１、１１４は、現用送信回路（１）
１０４、１０７および現用送信回路（Ｎ）１０５、１０
８とを含むＮ個の現用送信回路と通信回線を介して接続
されるＮ個の現用受信回路の中の二つにより送られてき
た信号を元のデジタル信号に復調し、現用受信回路
（１）１１０は現用受信回路（１）１１３から出力され
２ｂを通して送られるデジタル信号を用いて伝送路で生
じる異偏波間の干渉を削除する。The spare receiving circuits (1) 109 and 112 are connected to the spare transmitting circuits (1) 103 and 106 through communication lines, and demodulate the transmitted signals into original digital signals to detect line quality, The preliminary reception circuit (1) 109 cancels interference between different polarizations generated in the transmission line by using the digital signal output from the preliminary reception circuit (1) 112 and transmitted through 1b. On the contrary, the preliminary reception circuit (1) 112 cancels the interference between different polarizations generated in the transmission line by using the digital signal output from the preliminary reception circuit (1) 109 and sent through 1a. The working receiver circuits (1) 110 and 113 and the working receiver circuits (N) 111 and 114 are the working transmitter circuits (1).
104, 107 and working transmission circuit (N) 105, 10
The signal sent by two of the N working transmission circuits including the N working transmission circuits including N and 8 is demodulated to the original digital signal, and the working reception circuit (1 ) 110 uses the digital signal output from the working receiver circuit (1) 113 and sent through 2b to eliminate the interference between different polarizations occurring in the transmission path.
【００２５】逆に現用受信回路（１）１１３は現用受信
回路（１）１１０から出力され２ａを通して送られるデ
ジタル信号を用いて伝送路で生じる異偏波間の干渉を削
除し、同様に現用受信回路（Ｎ）１１１は現用受信回路
（Ｎ）１１４から出力され３ｂを通して送られるデジタ
ル信号を用いて伝送路で生じる異偏波間の干渉を削除
し、逆に現用受信回路（Ｎ）１１４は現用受信回路
（Ｎ）１１１から出力され３ａを通して送られるデジタ
ル信号を用いて伝送路で生じる異偏波間の干渉を削除す
る。On the contrary, the working receiving circuit (1) 113 cancels the interference between different polarizations generated in the transmission line by using the digital signal output from the working receiving circuit (1) 110 and sent through 2a, and similarly the working receiving circuit (1) 113 The (N) 111 eliminates interference between different polarizations generated in the transmission line by using the digital signal output from the working receiving circuit (N) 114 and sent through 3b. Conversely, the working receiving circuit (N) 114 is the working receiving circuit. Using the digital signal output from (N) 111 and sent through 3a, the interference between different polarizations generated in the transmission path is eliminated.
【００２６】警報回路１１８は、予備受信回路（１）１
０９および予備受信回路（１）１１２と接続され、それ
ぞれ１０、１６より回線品質情報を受け取り、少なくと
もどちらか一方が予め定められた回線品質を下回った場
合回線障害警報２２を回線切替制御回路１１７に送信す
る。警報回路１１９は、現用受信回路（１）１１０およ
び現用受信回路（１）１１３と接続され、それぞれ１
２、１８より回線品質情報を受け取り少なくともどちら
か一方が予め定められた回線品質を下回った場合回線障
害警報２３を回線切替制御回路１１７に送信する。警報
回路１２０は、現用受信回路（Ｎ）１１１および現用受
信回路（Ｎ）１１４と接続され、それぞれ１４、２０よ
り回線品質情報を受け取り少なくともどちらか一方が予
め定められた回線品質を下回った場合回線障害警報２４
を回線切替制御回路１１７に送信する。The alarm circuit 118 is a standby receiver circuit (1) 1
09 and standby reception circuit (1) 112, respectively receives line quality information from 10 and 16, and when at least one of them falls below a predetermined line quality, the line failure warning 22 is sent to the line switching control circuit 117. Send. The alarm circuit 119 is connected to the current receiving circuit (1) 110 and the current receiving circuit (1) 113, and each of them is 1
When the line quality information is received from Nos. 2 and 18, and at least one of the line quality information falls below a predetermined line quality, the line fault alarm 23 is transmitted to the line switching control circuit 117. The alarm circuit 120 is connected to the working receiving circuit (N) 111 and the working receiving circuit (N) 114, receives line quality information from each of 14 and 20, and when at least one of them falls below a predetermined line quality. Fault alert 24
To the line switching control circuit 117.
【００２７】回線切替制御回路１１７は警報回路１１
８、警報回路１１９、および警報回路１２０を含むＮ個
の警報回路の出力結果により現用回線より回線障害警報
が出ている場合は、その回線を予備に切替えるべく送端
回線切替回路１０１、１０２および受端回線切替回路１
１５、１１６を制御する。受端回線切替回路１１５、１
１６は回線切替制御回路１１７からの制御信号によりＮ
個の現用受信回路のうち回線障害警報が発生している現
用回線を用いて送られるデジタル信号を回線障害アラー
ムの発生していない予備回線からのデジタル信号に切り
替え出力し、回線障害警報の発生していない現用回線を
用いて送られるデジタル信号を出力する。The line switching control circuit 117 is the alarm circuit 11
If a line failure alarm is output from the working line according to the output results of the N alarm circuits including the alarm circuit 119, the alarm circuit 119 and the alarm circuit 120, the transmission line switching circuits 101, 102 and Receiver circuit switching circuit 1
15 and 116 are controlled. Receiver line switching circuit 115, 1
16 is N by the control signal from the line switching control circuit 117.
The digital signal sent using the working line with the line fault alarm out of the number of working receiver circuits is switched to the digital signal from the protection line without the line fault alarm, and the line fault alarm is generated. It outputs a digital signal sent using the working line that is not used.
【００２８】[0028]
【発明の効果】以上説明したように本発明によれば、複
数の現用回線に対して予備回線を有し、しかもＸＰＩＣ
を用いて同一周波数に対しＶ偏波およびＨ偏波の両偏波
を使用するデジタル信号無線伝送で、同一周波数のＶ偏
波およびＨ偏波を用いている回線を一組として同時に切
り替えることにより、切替制御回路の設置を一つにする
ことができる経済的な効果がある。As described above, according to the present invention, a protection line is provided for a plurality of working lines and the XPIC is used.
By wirelessly transmitting digital signals using both V-polarized and H-polarized waves for the same frequency by switching the lines using V-polarized wave and H-polarized wave of the same frequency as one set at the same time. There is an economic effect that the switching control circuit can be installed in one unit.
【図１】本発明実施例の構成を示すブロック図。FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
【図２】従来例のシステム毎に回線切替制御回路を持ち
システム毎に現用回線２本および予備回線１本の間で回
線切替をする場合の構成を示すブロック図。FIG. 2 is a block diagram showing a configuration of a conventional example in which a line switching control circuit is provided for each system and a line is switched between two working lines and one protection line for each system.
【図３】（ａ）および（ｂ）は一般的なインターリーブ
周波数配置を示す図、（ｃ）は同一周波数に対しＶ偏波
およびＨ偏波の両偏波を使用した場合の一般的な周波数
配置を示す図。3 (a) and 3 (b) are diagrams showing a general interleaved frequency arrangement, and FIG. 3 (c) is a general frequency when V polarization and H polarization are used for the same frequency. FIG.
１０１、１０２、２０１、３０１ 送端回線切替回路 １０３、１０６、２０２、３０２ 予備送信回路（１） １０４、１０７、２０３、３０３ 現用送信回路（１） １０５、１０８ 現用送信回路（Ｎ） １０９、１１２、２０５、３０５ 予備受信回路（１） １１０、１１３、２０６、３０６ 現用受信回路（１） １１１、１１４ 現用受信回路（Ｎ） １１５、１１６、２０８、３０８ 受端回線切替回路 １１７、２０９、３０９ 回線切替制御回路 １１８、１１９、１２０ 警報回路 ２０４、３０４ 現用送信回路（２） ２０７、３０７ 現用受信回路（２） 101, 102, 201, 301 Transmission line switching circuit 103, 106, 202, 302 Backup transmission circuit (1) 104, 107, 203, 303 Active transmission circuit (1) 105, 108 Active transmission circuit (N) 109, 112 , 205, 305 Backup receiving circuit (1) 110, 113, 206, 306 Working receiving circuit (1) 111, 114 Working receiving circuit (N) 115, 116, 208, 308 Receiving line switching circuit 117, 209, 309 line Switching control circuit 118, 119, 120 Alarm circuit 204, 304 Active transmission circuit (2) 207, 307 Active reception circuit (2)
Claims (1)
を有し、しかも交差偏波干渉除去回路を用いて同一周波
数に対しＶ偏波およびＨ偏波の両偏波を使用するデジタ
ル信号無線伝送路に挿入された現用予備切替装置におい
て、 異偏波同一周波数の少なくとも一つの受信出力が予め定
められた回線品質を下回った場合にその異偏波同一周波
数の伝送路の全部に切替制御信号を送出する回線切替制
御回路を備えたことを特徴とする現用予備切替え装置。1. A digital signal which has a small number of protection lines for a plurality of working lines and uses both polarizations of V polarization and H polarization for the same frequency by using a cross polarization interference cancellation circuit. In the active standby switching device inserted in the wireless transmission path, if at least one received output of the same polarization of the different polarization falls below the predetermined line quality, switching control is performed to all the transmission paths of the same polarization of the different polarization. An active backup switching device comprising a line switching control circuit for transmitting a signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16636492A JPH0614005A (en) | 1992-06-24 | 1992-06-24 | Active standby changeover device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16636492A JPH0614005A (en) | 1992-06-24 | 1992-06-24 | Active standby changeover device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0614005A true JPH0614005A (en) | 1994-01-21 |
Family
ID=15830033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16636492A Pending JPH0614005A (en) | 1992-06-24 | 1992-06-24 | Active standby changeover device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0614005A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6996077B1 (en) | 1997-07-03 | 2006-02-07 | Kabushiki Kaisha Toshiba | Satellite broadcasting system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093832A (en) * | 1983-10-27 | 1985-05-25 | Nec Corp | Line switching system |
| JPH01274534A (en) * | 1988-04-26 | 1989-11-02 | Nec Corp | Transmission system for digital radio using polarized wave in common |
| JPH01288115A (en) * | 1988-05-16 | 1989-11-20 | Nec Corp | Standby changeover system for microwave communication line |
| JPH053465A (en) * | 1991-06-25 | 1993-01-08 | Fujitsu Ltd | Multiplex radio equipment by hot standby communication system |
| JPH05244116A (en) * | 1992-02-27 | 1993-09-21 | Nec Corp | Digital radio system for both polarized waves transmission system |
-
1992
- 1992-06-24 JP JP16636492A patent/JPH0614005A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093832A (en) * | 1983-10-27 | 1985-05-25 | Nec Corp | Line switching system |
| JPH01274534A (en) * | 1988-04-26 | 1989-11-02 | Nec Corp | Transmission system for digital radio using polarized wave in common |
| JPH01288115A (en) * | 1988-05-16 | 1989-11-20 | Nec Corp | Standby changeover system for microwave communication line |
| JPH053465A (en) * | 1991-06-25 | 1993-01-08 | Fujitsu Ltd | Multiplex radio equipment by hot standby communication system |
| JPH05244116A (en) * | 1992-02-27 | 1993-09-21 | Nec Corp | Digital radio system for both polarized waves transmission system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6996077B1 (en) | 1997-07-03 | 2006-02-07 | Kabushiki Kaisha Toshiba | Satellite broadcasting system |
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