JP2567707B2 - Working-Standby line switching method - Google Patents
Working-Standby line switching methodInfo
- Publication number
- JP2567707B2 JP2567707B2 JP1227838A JP22783889A JP2567707B2 JP 2567707 B2 JP2567707 B2 JP 2567707B2 JP 1227838 A JP1227838 A JP 1227838A JP 22783889 A JP22783889 A JP 22783889A JP 2567707 B2 JP2567707 B2 JP 2567707B2
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- JP
- Japan
- Prior art keywords
- line
- end station
- working
- receiving end
- 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.)
- Expired - Fee Related
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Description
【発明の詳細な説明】 〔概要〕 現用回線Ｎ個と予備回線とからなるディジタル無線回
線の送端局が中間の中継器を介し受端局と接続され、送
端局と中継局との間の現用回線に障害が発生した際予備
回線への切替えが行われる現用−予備回線切替方法にお
いて、障害発生の際に切替が確実に行われ、また更に他
の現用回線に障害の発生した際切替の優先順位が維持可
能で、しかも中継局から受端局へ連絡用の副信号等の送
出ができるようにすするため、現用回線Ｎ個と予備回線
とからなるディジタル無線回線に於いて、送端局（10）
と受端局（30）とが中間の中継器（20）を介し接続さ
れ、かつ送端局側と受端局側とにそれぞれ回線切替器
（SW）を備え、現用回線の１つに障害が発生した際障害
現用回線から予備回線への切替えが行われる現用−予備
回線切替方法に於いて、 送端局（10）と中継器（30）との間で無線の受信入力
の断、またはフレーム同期外れが生じた際、中継器（2
0）では、送端局（10）からの信号を無効とし、障害情
報発生器（１）からのビット数ｎの同期外れ情報と、必
要の場合副信号を加え更にフレームビットを再挿入して
新たなフレームフオーマットを形成し受端局（30）へ送
出して受端局に於いて同期がとれるようにし、 受端局（30）では障害情報検出器（２）が、同期のと
れた新たなフレームフオーマットから同期外れ情報を検
出して検出信号（ｄ）を発生し送端局（10）側と受端局
（30）側の回線切替器（SAW）に送出し、 送端局側及び受端局側のそれぞれの回線切替器は検出
信号（ｄ）によって制御され、障害現用回線から予備回
線への切替えが行なわれるようにする。DETAILED DESCRIPTION OF THE INVENTION [Outline] A transmitting end station of a digital radio line consisting of N working lines and a protection line is connected to a receiving end station via an intermediate relay, and is connected between the transmitting end station and the relay station. In the working-protection line switching method, switching is performed to the protection line when a failure occurs in the working line of the above. In the method of switching the protection line to the protection line, switching is reliably performed when a failure occurs, and switching is performed when a failure occurs in another working line. In order to maintain the priority of, and to enable transmission of sub-signals etc. for communication from the relay station to the receiving end station, in the digital radio circuit consisting of N working circuits and protection circuit, Terminal (10)
And the receiving end station (30) are connected via an intermediate repeater (20), and the sending end station side and the receiving end station side are each equipped with a line switch (SW), and one of the working lines is damaged. When a fault occurs, the working line is switched to the protection line. In the working-protection line switching method, the wireless reception input is cut off between the sending terminal (10) and the repeater (30), or When the frame is out of sync, the repeater (2
In 0), the signal from the transmitting end station (10) is invalidated, out-of-synchronization information of the number of bits n from the failure information generator (1), and if necessary, a sub-signal is added to reinsert the frame bit. A new frame format is formed and sent to the receiving end station (30) so that the receiving end station can be synchronized. In the receiving end station (30), the failure information detector (2) is synchronized with the new one. Out-of-sync information is detected from a simple frame format and a detection signal (d) is generated and sent to the line switch (SAW) on the sending end station (10) side and the receiving end station (30) side. Each line switching unit on the receiving terminal side is controlled by the detection signal (d) so that the fault working line is switched to the protection line.
本発明はディジタル無線回線の送端局側と受端局側と
に回線切替器を有し、Ｎ個の現用回線の一つの障害時に
障害現用回線を予備回線に切り替える回線切替方法に係
り、特に中継器と送端局との間で回線に障害が生じ、中
継局で無線の受信信号入力が断又はフレーム同期外れを
検出した場合、中継器では受端局に障害情報を送出し、
受端局では自局側及び送端局側の回線切替器を制御して
障害現用回線から予備回線への切替えが行われるが、こ
の切替えが確実に行われると共に新たに他の現用回線に
障害が発生した際に予備回線への優先切替順位が維持さ
れ、さらに中継器から受端局へは連絡用の副信号等の送
出が可能となるようにすることが要望されている。The present invention relates to a line switching method for switching a failed working line to a protection line when one of N working lines has a line switching device on the sending end side and the receiving end side of a digital radio line. When a failure occurs in the line between the repeater and the transmitting end station, and the relay station detects a wireless reception signal input or loss of frame synchronization, the repeater sends failure information to the receiving end station,
The receiving end station controls the line switching devices on its own side and the transmitting end side to switch from the faulty working line to the protection line, but this switching is performed reliably and another working line is newly disturbed. It is desired that the priority switching order to the protection line be maintained when the occurrence of the above occurs and that the sub signal for communication can be transmitted from the repeater to the receiving end station.
従来の現用−予備回線切替方法では、第４図の如き回
線構成に於いて、送端局10と受端局30との中間の中継器
20にて、送端局10との間でＮ個の現用回線の１回線11に
障害が生じ、無線の受信信号入力の断又はフレーム同期
外れを検出した場合、中継器20では第５図のフレームフ
オーマット中の送端局からの主信号を無効にするため、
例えば主信号の符号を全て１とし、続いて送信スペクト
ラムの平滑化等のため符号１の連続を、所定の疑似ラン
ダムデータと共に排他的論理和によってスクランブル
し、１の連続を避け、かつ障害情報としてパリティビッ
トの計数結果を反転させ、必要な場合連絡用のDSC（dig
ital service channel）等の副信号を加え、フレームビ
ットを再挿入してフレームフオーマットを新たに形成
し、受端局30でフレーム同期がとれるようにして受端局
に送信する。In the conventional working / protection line switching method, in the line configuration as shown in FIG. 4, an intermediate repeater between the transmitting end station 10 and the receiving end station 30.
At 20, if one of the N working lines 11 with the transmitting terminal station 10 fails, and the disconnection of the received radio signal or the loss of frame synchronization is detected, the repeater 20 of FIG. In order to cancel the main signal from the terminal station in the frame format,
For example, all the codes of the main signal are set to 1, and then a sequence of codes 1 is scrambled by exclusive OR with predetermined pseudo-random data for smoothing the transmission spectrum, etc. Invert the counting result of the parity bit and, if necessary, the DSC (dig
Sub-signals such as ital service channels) are added, frame bits are re-inserted to newly form a frame format, and the frame is transmitted to the receiving end station so that the receiving end station 30 can achieve frame synchronization.
この場合、中継器20では送端局10からの受信入力の断
又はフレーム同期外れを検出して上記の如き新たなフレ
ームフオーマットを形成し、受端局に送出するまでに数
msの時間を必要とするので、受端局30ではこの数msの間
は中継局20を介し受信入力の断の状態又は同期外れの信
号をそのまま受信するので、この間はフレーム同期外れ
のアラームALMFSYNを送出するが、中継局からの新たな
フレームフオーマットを受信した後はフレーム同期外れ
のアラームALMFSYNに替わって、回線11のパリテイビッ
トＰの計数結果の検知により、ビット誤りのアラームAL
MBERを発生し、送端局10側及び受端局30側の回線切替器
SWへ送出し、予備回線０への回線切替を行うような構成
となっている。In this case, the repeater 20 detects disconnection of the reception input from the transmitting end station 10 or loss of frame synchronization, forms a new frame format as described above, and waits for transmission to the receiving end station.
Since the time of ms is required, the receiving end station 30 receives the signal of the reception input disconnection or the out-of-synchronization signal as it is through the relay station 20 during this several ms, and the frame-out-of-frame alarm ALM is received during this period. FSYN is sent, but after receiving a new frame format from the relay station, the alarm ALM FSYN is out of frame synchronization, and the bit error alarm AL is detected by detecting the counting result of the parity bit P on line 11.
Line switcher for generating M BER and for transmitting terminal station 10 side and receiving terminal station 30 side
It is configured to send to the SW and switch the line to the standby line 0.
しかしながら、上記の如く中継局20が一つの現用回線
11の障害を検出し、受端局30がビット誤り障害のアラー
ムALMBERを発生して送端局10側と受端局30側との回線切
替器SWへ送出し、回線11を予備回線０へ切替えた後に、
他の現用回線12の中継局20がこの現用回線12に於いて同
様の障害を検出し、そこで新たなフレームフオーマット
を形成して、受端局に送出するまでの間、受端局では前
述の如くフレーム同期外れのアラームALMFSYNを送出す
る。However, as described above, the relay station 20 has only one working line.
Detecting 11 faults, the receiving end station 30 generates a bit error fault alarm ALM BER and sends it to the line switch SW between the transmitting end station 10 side and the receiving end station 30 side, and the line 11 is the protection line 0 After switching to
Until the relay station 20 of the other working line 12 detects a similar failure in this working line 12, forms a new frame format there, and sends it to the receiving end station, the above-mentioned is performed in the receiving end station. As described above, the alarm ALM FSYN out of frame synchronization is transmitted.
この同期外れのアラームALMFSYNは、中継局からの新
たなフレームフオーマットの受信によって数msの後には
本来アラームALMBERに切替わるものである。This out-of-sync alarm ALM FSYN is supposed to switch to the alarm ALM BER after a few ms due to the reception of a new frame format from the relay station.
しかし送端局10と受端局30の回線切替SWの切替がフレ
ーム同期外れのアラームALMFSYNを、ビット誤り障害の
アラームALMBERよりも優先する事となっている場合、後
からのフレーム同期外れアラームALMFSYNによってその
現用回線12が、先にフレーム同期外れを起こしたが最終
的にはビット誤り障害のアラームALMBERを送出すること
によって予備回線０に切替えられていた現用回線11を切
戻し、それに取って替わることになり、同じ障害の場合
の回線切替の先発優先が遵守されないという問題があっ
た。However, if the switching of the line switching SW of the transmitting end station 10 and the receiving end station 30 is to give priority to the alarm ALM FSYN of out of frame synchronization over the alarm ALM BER of bit error failure, the frame out of sync will be lost later. The alarm ALM FSYN causes the working line 12 to switch back to the working line 11 which had been switched to the protection line 0 by sending out the alarm ALM BER of the bit error failure, which caused the loss of frame synchronization earlier, There is a problem in that the start-up priority of line switching in the case of the same failure is not observed.
本発明は中継局に於ける同じフレーム同期外れの障害
の場合の回線切替の先発優先が遵守されるようにすると
共に中継局から受端局への連絡用の副信号等の送信が可
能となるようにすることを目的とする。The present invention makes it possible to comply with the advance priority of circuit switching in the case of the same out-of-frame failure in the relay station and to transmit a sub-signal for communication from the relay station to the receiving end station. The purpose is to do so.
上記目的は本発明によって現用回線Ｎ個と予備回線と
からなるディジタル無線回線に於いて、送端局（10）と
受端局（30）とが中間の中継器（20）を介し接続され、
かつ送端局側と受端局側とにそれぞれ回線切替器（SW）
を備え、現用回線の１つに障害が発生した際障害現用回
線から予備回線への切替えが行われる現用−予備回線切
替方法に於いて、 送端局（10）と中継器（30）との間で無線の受信入力
の断、またはフレーム同期外れが生じた際、中継器（2
0）では、送端局（10）からの信号を無効とし、障害情
報発生器（１）からのビット数ｎの同期外れ情報と、必
要の場合副信号を加え更にフレームビットを再挿入して
新たなフレームフオーマットを形成し受端局（30）へ送
出して受端局に於いて同期がとれるようにし、 受端局（30）では障害情報検出器（２）が、同期のと
れた新たなフレームフオーマットから同期外れ情報を検
出して検出信号（ｄ）を発生し送端局（10）側と受端局
（30）側の回線切替器（SAW）に送出し、 送端局側及び受端局側のそれぞれの回線切替器は検出
信号（ｄ）によって制御され、障害現用回線から予備回
線への切替えを行うことを特徴とする現用−予備回線切
替方法によって達成される。According to the present invention, the transmitting end station (10) and the receiving end station (30) are connected via an intermediate repeater (20) in a digital radio line consisting of N working lines and a protection line according to the present invention,
And the line switch (SW) on each of the transmitting end station side and the receiving end side
In the working-protection line switching method, in which the failure working line is switched to the protection line when one of the working lines fails, the transmission terminal station (10) and the repeater (30) are connected. When the wireless reception input is interrupted or the frame synchronization is lost, the repeater (2
In 0), the signal from the transmitting end station (10) is invalidated, out-of-synchronization information of the number of bits n from the failure information generator (1), and if necessary, a sub-signal is added to reinsert the frame bit. A new frame format is formed and sent to the receiving end station (30) so that the receiving end station can be synchronized. In the receiving end station (30), the failure information detector (2) is synchronized with the new one. Out-of-sync information is detected from a simple frame format and a detection signal (d) is generated and sent to the line switch (SAW) on the sending end station (10) side and the receiving end station (30) side. Each line switching unit on the receiving terminal side is controlled by the detection signal (d), and it is achieved by the working / protection line switching method characterized by switching from the failed working line to the protection line.
本発明の基本構成を示す第１図に於いて、 １は中継局20に設けられた障害情報発生器であり、中
継局20で送端局10からの現用回線11の受信信号の断又は
フレーム同期外れを検出した場合、一定ビット数ｎのフ
レーム同期外れ情報を発生し、受端局への送信信号のフ
レームフオーマット中に挿入する。In FIG. 1 showing the basic configuration of the present invention, reference numeral 1 is a fault information generator provided in a relay station 20, which is used to disconnect a signal received from a working line 11 from a transmitting terminal station 10 in the relay station 20 or a frame. When out-of-sync is detected, out-of-frame information of a fixed number of bits n is generated and inserted into the frame format of the transmission signal to the receiving end station.
２は受端局30に設けられた障害情報検出器であり、中
継局20の障害情報発生器１からの受信信号のフレームフ
オーマットの中に挿入された現用回線11のフレーム同期
外れ情報を検出して検出信号ｄ（ALMFSYN）を送出す
る。Reference numeral 2 denotes a fault information detector provided in the receiving end station 30 for detecting the frame desynchronization information of the working line 11 inserted in the frame format of the received signal from the fault information generator 1 of the relay station 20. And sends a detection signal d (ALM FSYN ).
そして受端局30の障害情報検出器２の検出信号ｄ（AL
MFSYN）は、送端局10と受端局30の回線切替器SWの切替
信号となる。Then, the detection signal d (AL of the fault information detector 2 of the receiving end station 30
M FSYN ) is a switching signal for the line switch SW of the transmitting end station 10 and the receiving end station 30.
本発明の中継局20の障害情報発生器１は送端局10から
の現用回線11の受信信号の断又はフレーム同期外れを検
出した場合に、一定ビット数ｎのフレーム同期外れ情報
を発生し、受端局30への送信信号のフレームフオーマッ
トの主信号の中に挿入して送信する。When the failure information generator 1 of the relay station 20 of the present invention detects the disconnection of the reception signal of the working line 11 from the transmitting end station 10 or the loss of frame synchronization, it generates the information of loss of frame synchronization of a certain number of bits n, It is inserted in the main signal of the frame format of the transmission signal to the receiving end station 30 and transmitted.
なお、中継局20は従来通り、伝送する主信号の符号を
無効にするため符号の全てを１とし、かつ送信スペクト
ラムの平滑化のため連続１を所定の疑似ランダムデータ
と共にスクランブルを施し、必要の場合副信号を付加
し、さらにフレームビットを再挿入してフレームフオー
マットを新たに形成し、受端局30でフレーム同期が取れ
るようにして受端局に送信する。Note that the relay station 20 sets all the codes to 1 in order to invalidate the code of the main signal to be transmitted, and scrambles continuous 1 with predetermined pseudo-random data to smooth the transmission spectrum, as in the conventional case. In this case, a sub-signal is added, frame bits are re-inserted to newly form a frame format, and the receiving end station 30 transmits the data to the receiving end station so that the frame synchronization can be obtained.
受端局30では、新たなフレームフオーマットを受信す
るまでの数msの間既述の如くアラームALMFSYNを発生す
るが、新たなフレームフオーマットを受信するとこの受
端局の障害情報検出器２は、中継局20の障害情報発生器
１からの受信信号のフレームフオーマットの中に挿入さ
れた現用回線11のフレーム同期外れ情報を検出し、検出
信号ｄであるアラームALMFSYNを送端局10側と受端局30
側とへ送り、検出信号ｄを夫々の回線切替器SWの切替信
号とし、フレーム同期外れ障害の現用回線11の伝送信号
を予備回線０に切り替えて回線切替を行う。従って本発
明では、中継局20において最初の現用回線11にフレーム
同期外れの障害が起きた場合に、次に図示しない現用回
線12に同じフレーム同期外れの障害が起きても、最初の
現用回線11が常に、予備回線０への切替の先発優先が遵
守されるので問題は解決され、さらに中継局から受端局
への連絡用の副信号等の送信は確実に保持されることに
なる。At the receiving end station 30, the alarm ALM FSYN is generated as described above for a few ms until a new frame format is received, but when a new frame format is received, the fault information detector 2 of this receiving end station, The out-of-frame information of the working line 11 inserted in the frame format of the received signal from the fault information generator 1 of the relay station 20 is detected, and the alarm ALM FSYN which is the detection signal d is received with the sending terminal station 10 side. Terminal 30
Then, the detection signal d is used as a switching signal for each line switch SW, and the transmission signal of the working line 11 having the frame out-of-sync failure is switched to the protection line 0 to switch the line. Therefore, according to the present invention, in the relay station 20, when the first working line 11 is out of frame sync failure, the first working line 11 is not affected by the same out-of-frame failure in the working line 12 not shown next. However, since the advance priority of switching to the protection line 0 is always adhered to, the problem is solved, and further, transmission of the sub signal for communication from the relay station to the receiving end station is reliably held.
第２図は本発明の実施例の構成を示すブロック図であ
る。FIG. 2 is a block diagram showing the configuration of the embodiment of the present invention.
第２図において、中継局20の現用回線11,12の障害情
報発生器１は、何れも一定ビット数ｎ＝５ビット発生器
で構成され、送端局10からの現用回線11に受信信号の断
又はフレーム同期外れを検出した場合に、５ビット発生
器の出力の５ビットの全ビットを符号“1"とし同期外れ
情報として受端局30への送信信号のフレームフオーマッ
ト（第３図）の主信号の中に挿入して送信する。In FIG. 2, each of the fault information generators 1 of the working lines 11 and 12 of the relay station 20 is composed of a fixed number of bits n = 5 bit generator, and the received signal from the sending end station 10 to the working line 11 is transmitted. When disconnection or loss of frame synchronization is detected, all 5 bits of the output of the 5-bit generator are set to code "1", and as a loss of synchronization information, the frame format of the transmission signal to the receiving end station 30 (Fig. 3) is set. It is inserted in the main signal and transmitted.
既述の如く中継局20は、送端局からの主信号を無効に
するため例えばスクランブルを施し、必要な場合副信号
を加え、さらに受端局30でフレーム同期が取れるように
フレームビットを再挿入して新たなフレームフオーマッ
トを形成して受端局30へ送信する。As described above, the relay station 20 performs scrambling, for example, to invalidate the main signal from the transmitting end station, adds a sub signal if necessary, and retransmits frame bits so that the receiving end station 30 can obtain frame synchronization. It is inserted to form a new frame format and transmitted to the receiving end station 30.
受端局30では、かかる新たなフレームフオーマットを
受信するまでの数msの間、中継局を介する送端局からの
同期外れの信号をそのまま受信してアラームALMFSYNを
発生するが、新たなフレームフオーマットを受信すると
障害情報検出器２は、５ビットの多数決判定器で構成さ
れ、例えば、５ビットのうち３ビットが“1"で２ビット
が“0"の場合でも、フレーム同期外れと判定するように
様に構成されているので、中継局20の障害情報発生器１
からの現用回線11の受信信号のフレームフオーマットの
中に挿入されたフレーム同期外れ情報を検出し、検出信
号ｄとしてのアラームALMFSYNを発生し、送端局10側と
受端側30側の回線切替器へ送る。The receiving end station 30 receives an out-of-sync signal from the transmitting end station via the relay station as it is for several ms until receiving the new frame format, and generates an alarm ALM FSYN. When a format is received, the fault information detector 2 is composed of a 5-bit majority decision unit. For example, even if 3 bits of 5 bits are "1" and 2 bits are "0", it is determined that the frame is out of synchronization. Since it is configured like this, the fault information generator 1 of the relay station 20
The out-of-frame information inserted in the frame format of the received signal of the working line 11 from the is detected, the alarm ALM FSYN as the detection signal d is generated, and the line of the sending end station 10 side and the receiving end side 30 Send to switch.
検出信号ｄは夫々の回線切替器SWの切替信号となり、
夫々同期外れ障害の現用回線11の伝送信号を予備回線０
に切り替えて回線切替を行う。The detection signal d becomes the switching signal of each line switch SW,
The transmission signals of the working line 11 each of which is out of sync failure are set to the protection line 0.
Switch to and switch lines.
中継局20において、現用回線11の次に現用回線12につ
いても送端局10からの受信信号のフレーム同期外れを検
出した場合は、前記と同様に、現用回線12の５ビット発
生器の出力の５ビットの全ビットを符号“1"として受端
局30への送信信号のフレームフオーマットの主信号の中
に挿入して送信し、受端局30が、現用回線12の障害情報
検出器２の５ビットの多数決判定器で、５ビットのうち
の３ビット以上の“1"で現用回線12の障害を判定し、判
定信号ｄのアラームALMFSYNを、送端局10側と受端局30
側との回線切替器SWへ切替信号として送信するが、送端
局10側と受端局30側との回線切替器SWは、既に先発の現
用回線11のフレーム同期外れ障害のアラームALMFSYNで
現用回線11の伝送信号を予備回線０へ切替えているの
で、現用回線12の伝送信号の予備回線０への切替は行わ
れない。When the relay station 20 detects the loss of frame synchronization of the received signal from the transmitting end station 10 with respect to the working line 12 next to the working line 11, the output of the 5-bit generator of the working line 12 is output as described above. All five bits are coded as "1" and inserted into the main signal of the frame format of the transmission signal to the receiving end station 30 and transmitted, and the receiving end station 30 transmits the fault information detector 2 of the working line 12. The 5-bit majority decision device decides the fault of the working line 12 by "1" of 3 bits or more out of 5 bits, and outputs the alarm ALM FSYN of the decision signal d to the sending end station 10 side and the receiving end station 30.
Although it is transmitted as a switching signal to the line switch SW with the side, the line switch SW between the sending end station 10 side and the receiving end station 30 side has already issued the alarm ALM FSYN of the frame synchronization loss failure of the working line 11 which has been started earlier . Since the transmission signal of the working line 11 is switched to the protection line 0, the transmission signal of the working line 12 is not switched to the protection line 0.
従って第２図の本発明の実施例では、先発した現用回
線11の予備回線０への切替の優先が保たれるので問題は
無い。Therefore, in the embodiment of the present invention shown in FIG. 2, there is no problem because the prioritization of switching the working line 11 to the protection line 0 is maintained.
以上説明した如く、本発明によれば、フレーム同期外
れが先に起きた現用回線の予備回線への優先切替が保証
される効果がある。又、送端局との間でフレーム同期外
れのまま受端局へ信号を送信するのではないので、従来
通り、フレーム同期外れを検出した中継局と受端局の間
で、例えば連絡用DSC等の副信号を正常に伝送できる効
果がある。As described above, according to the present invention, there is an effect that the priority switching of the working line to the protection line in which frame desynchronization occurs first is guaranteed. Also, since the signal is not transmitted to the receiving end station while the frame synchronization is lost with the transmitting end station, as in the conventional case, for example, a DSC for communication is provided between the relay station and the receiving end station that detect the loss of frame synchronization. This has the effect of normally transmitting sub-signals such as.
第１図は本発明の現用−予備回線切替方法の基本構成を
示す原理図、 第２図は本発明の実施例の構成を示すブロック図、 第３図は本発明の実施例の動作を説明するための伝送信
号のフレームフオーマット、 第４図は従来の構成を示すブロック図、 第５図は従来のフレームフオーマットである。 図において、 ０は予備回線、１は障害情報発生器、２は障害情報検出
器、10は送端局、11,12は現用回線、20は中継局、30は
受端局である。FIG. 1 is a principle diagram showing a basic configuration of a working / standby line switching method of the present invention, FIG. 2 is a block diagram showing a configuration of an embodiment of the present invention, and FIG. 3 is a diagram illustrating an operation of the embodiment of the present invention. FIG. 4 is a block diagram showing a conventional configuration, and FIG. 5 is a conventional frame format of a transmission signal for performing the above. In the figure, 0 is a protection line, 1 is a fault information generator, 2 is a fault information detector, 10 is a transmitting end station, 11 and 12 are working lines, 20 is a relay station, and 30 is a receiving end station.
Claims (1)
タル無線回線に於いて、送端局（10）と受端局（30）と
が中間の中継器（20）を介し接続され、かつ送端局側と
受端局側とにそれぞれ回線切替器（SW）を備え、現用回
線の１つに障害が発生した際障害現用回線から予備回線
への切替えが行われる現用−予備回線切替方法に於い
て、 送端局（10）と中継器（30）との間で無線の受信入力の
断、またはフレーム同期外れが生じた際、中継器（20）
では、送端局（10）からの信号を無効とし、障害情報発
生器（１）からのビット数ｎの同期外れ情報と、必要の
場合副信号を加え更にフレームビットを再挿入して新た
なフレームフオーマットを形成し受端局（30）へ送出し
て受端局に於いて同期がとれるようにし、 受端局（30）では障害情報検出器（２）が、同期のとれ
た新たなフレームフオーマットから同期外れ情報を検出
して検出信号（ｄ）を発生し送端局（10）側と受端局
（30）側の回線切替器（SAW）に送出し、 送端局側及び受端局側のそれぞれの回線切替器は検出信
号（ｄ）によって制御され、障害現用回線から予備回線
への切替えを行うことを特徴とする現用−予備回線切替
方法。1. A digital radio circuit comprising N working circuits and a protection circuit, wherein a transmitting terminal station (10) and a receiving terminal station (30) are connected via an intermediate repeater (20), and A line switching device (SW) is provided on each of the transmitting end station side and the receiving end side, and when one of the working lines fails, the working / protection line switching method is performed to switch from the failed working line to the protection line. In this case, when the wireless reception input is disconnected or the frame synchronization is lost between the transmitting terminal station (10) and the repeater (30), the repeater (20)
Then, the signal from the transmitting terminal station (10) is invalidated, out-of-synchronization information of the number n of bits from the fault information generator (1), and if necessary, a sub-signal is added and a frame bit is re-inserted to newly create a new bit. A frame format is formed and sent to the receiving end station (30) so that the receiving end station can be synchronized. In the receiving end station (30), the failure information detector (2) is used to synchronize with a new frame. Out-of-sync information is detected from the format and a detection signal (d) is generated and sent to the line switch (SAW) on the sending end station (10) side and the receiving end station (30) side. A working-protection line switching method characterized in that each line switching device on the station side is controlled by a detection signal (d) to switch from a fault working line to a protection line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1227838A JP2567707B2 (en) | 1989-09-01 | 1989-09-01 | Working-Standby line switching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1227838A JP2567707B2 (en) | 1989-09-01 | 1989-09-01 | Working-Standby line switching method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0389735A JPH0389735A (en) | 1991-04-15 |
| JP2567707B2 true JP2567707B2 (en) | 1996-12-25 |
Family
ID=16867161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1227838A Expired - Fee Related JP2567707B2 (en) | 1989-09-01 | 1989-09-01 | Working-Standby line switching method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2567707B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010008354A (en) * | 2000-11-27 | 2001-02-05 | 박동윤 | The floating waterway by plastic system for fish. |
-
1989
- 1989-09-01 JP JP1227838A patent/JP2567707B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0389735A (en) | 1991-04-15 |
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