JP2788840B2 - Wireless transmission system - Google Patents
Wireless transmission systemInfo
- Publication number
- JP2788840B2 JP2788840B2 JP5144525A JP14452593A JP2788840B2 JP 2788840 B2 JP2788840 B2 JP 2788840B2 JP 5144525 A JP5144525 A JP 5144525A JP 14452593 A JP14452593 A JP 14452593A JP 2788840 B2 JP2788840 B2 JP 2788840B2
- Authority
- JP
- Japan
- Prior art keywords
- line
- line switching
- working
- switching
- transmitting
- 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 - Fee Related
Links
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、デジタル無線通信にお
いて任意の現用回線に障害があった場合、その現用回線
を予備回線に切り換える回線切替方式による無線伝送方
式に関し、特に伝送容量の異なる信号を障害時に１つの
予備回線で救済する回線切替方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio transmission system using a line switching system for switching an active line to a protection line when a failure occurs in an arbitrary line in digital radio communication. The present invention relates to a line switching method in which a single spare line is used to recover from a failure.
【０００２】[0002]
【従来の技術】従来の一例を図２に示す。この例では、
Ｎ（＝２）個の現用回線ＣＨ１及びＣＨ２とＣＨ３及び
ＣＨ４に対してそれぞれ１つの予備回線で構成されてい
る。つまり、Ｍ（＝２）種類の信号に対してＭ個の予備
回線ＳＣＨ１１，ＳＣＨ１２が存在する。2. Description of the Related Art FIG. 2 shows a conventional example. In this example,
Each of the N (= 2) working lines CH1 and CH2 and one of the protection lines is configured for CH3 and CH4. That is, there are M protection lines SCH11 and SCH12 for M (= 2) types of signals.
【０００３】回線切替の動作について簡単に説明する。
全現用回線が正常なときには送端側ではどの現用回線も
予備回線に切り換えられていないため、パイロット信号
発生器１０１，１０２からのパイロット信号が伝送され
る。受端側では、パイロット信号検出器１０３，１０４
が伝送されてきたパイロット信号を検出して予備回線に
どの現用回線も切り換えられてないこと、すなわち、全
現用回線が正常なことおよび予備回線も正常なことを判
断する。The operation of line switching will be briefly described.
When all the working lines are normal, no working line has been switched to the protection line at the transmitting end, so that pilot signals from pilot signal generators 101 and 102 are transmitted. On the receiving end side, pilot signal detectors 103 and 104
Detects the transmitted pilot signal and determines that no working line has been switched to the protection line, that is, determines that all working lines are normal and that the protection line is also normal.
【０００４】ここで、例えばフェージングが現用回線Ｃ
Ｈ１に発生し、回線にエラーが発生すると回線警報検出
器２１がそのエラーをカウントする。そして、それがあ
らかじめ設定された閾値を越えると回線警報を回線切替
情報発生回路１０６に出力する。回線切替情報発生回路
１０６はその回線警報を回線切替情報として送端側方向
の無線回線を利用して回線切替制御部１０５に伝送す
る。[0004] Here, for example, fading occurs in the working line C.
When the error occurs in H1 and an error occurs in the line, the line alarm detector 21 counts the error. When it exceeds a preset threshold, a line alarm is output to the line switching information generating circuit 106. The line switching information generating circuit 106 transmits the line alarm as line switching information to the line switching control unit 105 using the wireless line in the direction of the transmitting end.
【０００５】回線切替制御部１０５はこの情報を受信す
ると回線切替制御信号を出力し、回線切替手段１１Ｔを
動作させて、現用回線ＣＨ１の信号を予備回線ＳＣＨ１
１にのせかえる。また、受端側への無線回線を利用し
て、その応答信号を伝送する。そこで、受端側では、パ
イロット信号検出器１０３においてパイロット信号が無
くなった事、即ち、いずれかの現用回線が送端側で切り
換えられたことを検出すると、それを示す信号を回線切
替情報発生回路１０６に出力する。When receiving this information, the line switching control unit 105 outputs a line switching control signal, operates the line switching means 11T, and converts the signal of the working line CH1 to the protection line SCH1.
Replace with 1. Also, the response signal is transmitted using a wireless line to the receiving end. Therefore, on the receiving end side, when the pilot signal detector 103 detects that the pilot signal has disappeared, that is, when any of the working lines has been switched on the transmitting end side, a signal indicating this is sent to the line switching information generating circuit. Output to 106.
【０００６】この信号および受端側からの応答信号を受
信した回線切替情報発生回路１０６は現用回線ＣＨ１の
回線切替手段１１Ｒにその情報を出力する。回線切替手
段１１Ｒはこの信号を入力すると、それぞれの信号の位
相差を検出して位相が一致したときに予備回線ＳＣＨ１
１側に切り換えて全動作が完了する。The line switching information generating circuit 106 which has received this signal and the response signal from the receiving end outputs the information to the line switching means 11R of the working line CH1. When this signal is input, the line switching means 11R detects the phase difference between the signals, and when the phases match, the protection line SCH1
Switching to the 1 side completes the entire operation.
【０００７】現用回線ＣＨ２、ＣＨ３、ＣＨ４にフェー
ジングが発生した場合も全く同じ動作により救済され
る。[0007] When fading occurs in the working lines CH2, CH3 and CH4, it is remedied by exactly the same operation.
【０００８】[0008]
【発明が解決しようとする課題】以上述べた通り、従来
方式ではＮ個の現用回線に対してそれぞれ１つの予備回
線で構成されている。つまり、Ｍ種類の信号に対してＭ
個の予備回線が存在し、周波数の利用効率が悪い。ま
た、従来の無線伝送方式では全く独立したＭ種類のシス
テムにより構成されているため、回線切替制御部がＭ個
必要となる。As described above, in the conventional method, one protection line is provided for each of the N working lines. That is, for M kinds of signals, M
There are multiple protection lines, and the frequency utilization efficiency is poor. Further, since the conventional wireless transmission system is constituted by M types of systems which are completely independent, M line switching control units are required.
【０００９】それ故、本発明の課題は、回線切替制御部
を共用化することができ、周波数利用効率の高い回線切
替方式による無線伝送方式を提供することにある。Therefore, an object of the present invention is to provide a wireless transmission system using a line switching system that can share a line switching control unit and has high frequency use efficiency.
【００１０】[0010]
【課題を解決するための手段】本発明による無線伝送方
式は、Ｍ種類（Ｍは２以上の自然数）の異なる伝送容量
の信号を伝送する無線回線で、各伝送容量の信号につい
てそれぞれＮ個（Ｎは２以上の自然数）の現用回線とＭ
×Ｎ個の現用回線に対して１つの予備回線を持ち、送端
側では現用回線毎に設けられた送信側の第１の回線切替
手段と、これらの第１の回線切替手段のＭ種類の出力を
入力しＭ種類の内いずれか１回線の信号を前記予備回線
に入力する送信側の第２の回線切替手段と、前記第１の
回線切替手段と第２の回線切替手段を１つの回線切替情
報により切り替える１つの回線切替制御部とを備え、受
端側では、前記第１の回線切替手段に対応して現用回線
毎に設けられた複数の受信側の回線切替手段と、前記予
備回線からの信号を前記複数の受信側の回線切替手段に
分配する分配器と、それぞれの現用回線の回線品質を監
視し回線品質が劣化したときその現用回線の回線警報を
出力するＭ×Ｎ個の回線警報検出器と、前記Ｍ×Ｎ個の
回線警報検出器のそれぞれの出力を入力し回線警報が入
力されると、その情報を回線切替情報として対応する前
記受信側の回線切替手段へ出力する１つの回線切替情報
発生回路とを備え、該回線切替情報発生回路の出力を無
線回線を利用して送端側の前記回線切替制御部に伝送す
ることを特徴とする。A wireless transmission system according to the present invention is a wireless line for transmitting M types (M is a natural number of 2 or more) of signals having different transmission capacities. N is a natural number of 2 or more) and the working line and M
One protection line is provided for each of the × N working lines, and at the transmitting end, first line switching means on the transmission side provided for each working line, and M types of these first line switching means are provided. A second line switching unit on the transmitting side for inputting an output and inputting any one of M types of signals to the protection line, and the first line switching unit and the second line switching unit as one line A single line switching control unit for switching according to switching information, wherein at the receiving end, a plurality of receiving-side line switching units provided for each working line corresponding to the first line switching unit; And a M × N number of distributors for monitoring the line quality of each working line and outputting a line alarm of the working line when the line quality is deteriorated. A line alarm detector, and the M × N line alarm detectors A line switching information generation circuit for outputting the information as line switching information to the corresponding line switching means on the receiving side when the respective outputs are input and a line alarm is input. The output of the circuit is transmitted to the line switching control unit on the transmitting end using a wireless line.
【００１１】[0011]
【実施例】本発明による無線伝送方式の一実施例を図１
に示す。この実施例でも図２の例と同様、Ｍ＝２、Ｎ＝
２の場合を示し、同じ部分に同一番号を付して示す。図
から解るように、２種類の異なる伝送容量の信号を伝送
する無線回線で、各伝送容量の信号がそれぞれ２個の現
用回線ＣＨ１、ＣＨ２及びＣＨ３、ＣＨ４と２×２個の
現用回線に対して１つの予備回線ＳＣＨ１を持つ。送端
側ではそれぞれ２個の送信側の第１の回線切替手段１１
Ｔ，１２Ｔ及び１３Ｔ，１４Ｔと、これらの第１の回線
切替手段の２種類の出力を入力し、２種類の内いずれか
１回線の信号を予備回線ＳＣＨ１に入力する送信側の第
２の回線切替手段３１と、前記第１の回線切替手段１１
Ｔと１２Ｔあるいは第１の回線切替手段１３Ｔと１４Ｔ
を１つの回線切替情報により切り替える回線切替制御部
３２と、パイロット信号発生器１０１、１０２とを有し
ている。FIG. 1 shows an embodiment of a wireless transmission system according to the present invention.
Shown in In this embodiment, M = 2, N =
2, and the same parts are indicated by the same reference numerals. As can be seen from the figure, in a radio line transmitting two kinds of signals of different transmission capacities, signals of each transmission capacity correspond to two working lines CH1, CH2 and CH3, CH4 and 2 × 2 working lines, respectively. And one protection line SCH1. On the transmitting end side, two first line switching means 11 on the transmitting side
T, 12T, 13T, and 14T, and two types of outputs of these first line switching means, and a second line on the transmitting side that inputs one of the two types of signals to the protection line SCH1. Switching means 31 and the first line switching means 11
T and 12T or first line switching means 13T and 14T
And a pilot signal generator 101, 102 for switching the line switching by one line switching information.
【００１２】受端側では、送信側の第１の回線切替手段
に対応して現用回線毎に設けられた受信側の回線切替手
段１１Ｒ、１２Ｒ、１３Ｒ、１４Ｒと、それぞれの回線
品質を監視し回線品質が劣化したときその回線警報を出
力する２×２個の回線警報検出器２１，２２，２３，２
４と、これらの回線警報検出器のそれぞれの出力を入力
し回線警報が入力されると、その情報を回線切替情報と
して出力する回線切替情報発生回路３３と、パイロット
信号検出器１０３、１０４とを有し、前記回線切替情報
発生回路３３の出力を無線回線を利用して送端側の回線
切替制御部３２に伝送する。On the receiving end side, the line switching means 11R, 12R, 13R, 14R on the receiving side provided for each working line corresponding to the first line switching means on the transmitting side, and monitor the respective line qualities. 2 × 2 line alarm detectors 21, 22, 23, 2 for outputting a line alarm when the line quality is deteriorated
4, a line switching information generating circuit 33 for inputting the output of each of these line alarm detectors and receiving a line alarm and outputting the information as line switching information, and pilot signal detectors 103 and 104. And transmits the output of the line switching information generating circuit 33 to the line switching control unit 32 on the transmission side using a wireless line.
【００１３】ここで、たとえばフェージングが現用回線
ＣＨ１に発生し、回線にエラーが発生すると回線警報検
出器２１がそのエラーをカウントし、それがあらかじめ
設定された閾値を越えると回線警報を回線切替情報発生
回路３３に出力する。回線切替情報発生回路３３はその
回線警報を回線切替情報として送端側方向の無線回線を
利用して回線切替制御部３２に伝送する。回線切替制御
部３２はこの情報を受信すると切替制御信号を出力し、
第１の回線切替手段１１Ｔと第２の回線切替手段３１を
動作させて、現用回線ＣＨ１の信号を予備回線ＳＣＨ１
にのせかえて分配器３４に伝送する。また、受端側への
無線回線を利用して、その応答信号を伝送する。Here, for example, when fading occurs on the working line CH1 and an error occurs on the line, the line alarm detector 21 counts the error. When the error exceeds a preset threshold, a line alarm is sent to the line switching information. Output to the generation circuit 33. The line switching information generating circuit 33 transmits the line alarm as line switching information to the line switching control unit 32 using the wireless line in the direction of the transmitting end. Upon receiving this information, the line switching control unit 32 outputs a switching control signal,
By operating the first line switching means 11T and the second line switching means 31, the signal of the working line CH1 is transmitted to the protection line SCH1.
And transmits it to the distributor 34. Also, the response signal is transmitted using a wireless line to the receiving end.
【００１４】受端側では、パイロット信号検出器１０３
でパイロット信号が無くなった事、即ち、いずれかの現
用回線が送端側で切り換えられたことを検出すると、そ
れを示す信号を回線切替情報発生回路３３に出力する。
この信号および受端側からの応答信号を受信した回線切
替情報発生回路３３は現用回線ＣＨ１の回線切替手段１
１Ｒにその情報を出力する。回線切替手段１１Ｒはこの
信号を入力すると、分配器３４からの信号に対しそれぞ
れの信号の位相差を検出して位相が一致したときに予備
回線ＳＣＨ１側に切り換えて全動作が完了する。On the receiving end side, the pilot signal detector 103
When it detects that the pilot signal has disappeared, that is, that any of the working lines has been switched at the transmitting end, a signal indicating this is output to the line switching information generating circuit 33.
The line switching information generating circuit 33 which has received this signal and the response signal from the receiving end side switches the line switching means 1 of the working line CH1.
The information is output to 1R. When this signal is input, the line switching means 11R detects the phase difference between the signals from the distributor 34 and switches to the protection line SCH1 when the phases match, thereby completing the entire operation.
【００１５】現用回線ＣＨ２、ＣＨ３、ＣＨ４にフェー
ジングが発生した場合も全く同じ動作により救済され
る。When fading occurs in the working lines CH2, CH3 and CH4, the same operation is performed to relieve the fading.
【００１６】[0016]
【発明の効果】上述したように、Ｍ×Ｎ個の現用回線に
対して１つの回線切替制御部でも１つの予備回線で済む
ようにしたことにより、周波数利用効率の高い無線伝送
方式を提供できる。As described above, by using only one protection line for one line switching control unit for M × N working lines, it is possible to provide a radio transmission system with high frequency utilization efficiency. .
【図１】本発明による無線伝送方式の一実施例を示すブ
ロック図である。FIG. 1 is a block diagram showing one embodiment of a wireless transmission system according to the present invention.
【図２】従来の無線伝送方式の一実施例を示すブロック
図である。FIG. 2 is a block diagram showing one embodiment of a conventional wireless transmission system.
１１Ｔ〜１４Ｔ 送信側の第１の回線切替手段 １１Ｒ〜１４Ｒ 受信側の回線切替手段 ３１ 送信側の第２の回線切替手段 ２１〜２４ 回線警報検出器 １０１，１０２ パイロット信号発生器 １０３，１０４ パイロット信号検出器 ３２，１０５ 回線切替制御部 ３３，１０６ 回線切替情報発生回路 11T-14T First line switching means on transmission side 11R-14R Line switching means 31 on reception side Second line switching means 21-24 on transmission side Line alarm detector 101,102 Pilot signal generator 103,104 Pilot signal Detector 32, 105 Line switching control unit 33, 106 Line switching information generation circuit
Claims (2)
伝送容量の信号を伝送する無線回線で、各伝送容量の信
号についてそれぞれＮ個（Ｎは２以上の自然数）の現用
回線とＭ×Ｎ個の現用回線に対して１つの予備回線を持
ち、送端側では現用回線毎に設けられた送信側の第１の
回線切替手段と、これらの第１の回線切替手段のＭ種類
の出力を入力しＭ種類の内いずれか１回線の信号を前記
予備回線に入力する送信側の第２の回線切替手段と、前
記第１の回線切替手段と第２の回線切替手段を１つの回
線切替情報により切り替える１つの回線切替制御部とを
備え、受端側では、前記第１の回線切替手段に対応して
現用回線毎に設けられた複数の受信側の回線切替手段
と、前記予備回線からの信号を前記複数の受信側の回線
切替手段に分配する分配器と、それぞれの現用回線の回
線品質を監視し回線品質が劣化したときその現用回線の
回線警報を出力するＭ×Ｎ個の回線警報検出器と、前記
Ｍ×Ｎ個の回線警報検出器のそれぞれの出力を入力し回
線警報が入力されると、その情報を回線切替情報として
対応する前記受信側の回線切替手段へ出力する１つの回
線切替情報発生回路とを備え、該回線切替情報発生回路
の出力を無線回線を利用して送端側の前記回線切替制御
部に伝送することを特徴とする無線伝送方式。A wireless line for transmitting M kinds of signals (M is a natural number of 2 or more) of different transmission capacities, wherein N signals (N is a natural number of 2 or more) are used for each signal of each transmission capacity. One protection line is provided for each of the × N working lines, and at the transmitting end, first line switching means on the transmission side provided for each working line, and M types of these first line switching means are provided. A second line switching unit on the transmitting side for inputting an output and inputting any one of M types of signals to the protection line, and the first line switching unit and the second line switching unit as one line A single line switching control unit for switching according to switching information, wherein at the receiving end, a plurality of receiving-side line switching units provided for each working line corresponding to the first line switching unit; For distributing the signal from the receiver to the plurality of line switching means on the receiving side. And M × N line alarm detectors for monitoring the line quality of each working line and outputting a line alarm for the working line when the line quality is deteriorated, and the M × N line alarm detectors One line switching information generating circuit for outputting the information as line switching information to the corresponding line switching means on the receiving side when the respective outputs are input and the line alarm is input. Transmitting the output of (1) to the line switching control unit on the transmitting end side using a wireless line.
前記送端側には更に、前記Ｎ個の現用回線に対してパイ
ロット信号を出力するＭ個のパイロット信号発生器を備
え、前記受端側には前記Ｍ個のパイロット信号発生器に
対応してＭ個のパイロット信号検出器を備えて、前記送
端側からの前記パイロット信号が無くなると、いずれか
の現用回線が切替られたことを検出してそれを示す信号
を前記回線情報発生回路に出力することを特徴とする無
線伝送方式。2. The wireless transmission system according to claim 1, wherein
The transmitting end further includes M pilot signal generators that output pilot signals for the N working lines, and the receiving end corresponds to the M pilot signal generators. M pilot signal detectors, when the pilot signal from the transmitting end disappears, detects that any working line has been switched, and outputs a signal indicating this to the line information generating circuit. A wireless transmission system characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5144525A JP2788840B2 (en) | 1993-06-16 | 1993-06-16 | Wireless transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5144525A JP2788840B2 (en) | 1993-06-16 | 1993-06-16 | Wireless transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH077458A JPH077458A (en) | 1995-01-10 |
| JP2788840B2 true JP2788840B2 (en) | 1998-08-20 |
Family
ID=15364359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5144525A Expired - Fee Related JP2788840B2 (en) | 1993-06-16 | 1993-06-16 | Wireless transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2788840B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3972737B2 (en) | 2002-06-05 | 2007-09-05 | 日本電気株式会社 | Digital transmission system and digital transmission method used therefor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5992630A (en) * | 1982-11-19 | 1984-05-28 | Hitachi Denshi Ltd | Common stand-by system |
-
1993
- 1993-06-16 JP JP5144525A patent/JP2788840B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH077458A (en) | 1995-01-10 |
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