JPS6288450A - Line supervisory system - Google Patents

Abstract

PURPOSE:To improve the reliability of a digital radio communication line by detecting earlier the fault of a reception synchronizing switch before a fading takes place really and the switching is executed. CONSTITUTION:The data signal of each active radio system is sent sequentially in parallel to a spare radio system PROT according to a control signal from a switching controller at the normal operation where no parity error is detected, the data signal subjected to timing adjustment through a frequency division storage circuit 72 and a sequence conversion circuit 74 is compared with a data signal sent from each radio system by a bit collation circuit 76, and when a coincidence signal 104 is obtained, it is discriminated that the operation of the circuits is normal. In this case, no switching signal 103 is inputted and no actual changeover is executed. When no coincidence signal 104 is obtained even after a prescribed time (a time required for sequential conversion and bit collation by the sequence conversion circuit) conversely, since it is discriminated that any circuit operation is faulty, an alarm signal is sent to inform the abnormity.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は回線監視方式に関し、特に現用無線システムと
予備無線システムとの間で無ビット誤りの同期切替を行
うディジタル無線通信回線の回線監視方式に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a line monitoring system, and in particular to a line monitoring system for digital wireless communication lines that performs synchronous switching with no bit errors between a working radio system and a standby radio system. Regarding.

〔従来の技術〕[Conventional technology]

一般にディジタル無線通信回線においては、７エージン
グ等による回線障害を防止するため無ピツト誤シで現用
無線システムと予備無線システムとの切替が行える同期
切替方式が採用されている。In general, digital wireless communication lines employ a synchronous switching method that allows switching between a working wireless system and a standby wireless system without pitting errors in order to prevent line failures due to aging and the like.

すなわち、受信端局の各現用無線システムには受領同期
切替器が設けられ、送信端局から現用無線システムと予
備無線システムとに並列に送シ出されたデータ信号の間
のタイミング調整（同期調整）を行い、現用無線システ
ムで伝送されたデータ信号（第１のデータ信号）と予備
無線システムを介して伝送されたデータ信号（第２のデ
ータ信号）とのビットタイミングが完全に一致したこと
を確認してから無瞬断で切替を行うように構成されてい
る。この現用と予備との同期切替を制御するため、受信
端局では各無線システムのフレーム同期信号およびパリ
ティ・チェック・パルスを常時監視しておシ、パリティ
誤シが検出されてあらかじめ定められたしきい値を越え
ると、切替制御信号（並列送信および切替の指令）を送
出して切替を行うように構成されている。In other words, each working radio system of the receiving terminal station is provided with a reception synchronization switcher, which performs timing adjustment (synchronization adjustment) between data signals transmitted in parallel from the transmitting terminal station to the working radio system and the backup radio system. ) to confirm that the bit timings of the data signal (first data signal) transmitted by the working wireless system and the data signal (second data signal) transmitted via the backup wireless system completely match. It is configured to perform switching without momentary interruption after confirmation. In order to control this synchronization switching between active and backup, the receiving end station constantly monitors the frame synchronization signal and parity check pulse of each radio system, and detects parity errors and checks them as determined in advance. When a threshold is exceeded, a switching control signal (parallel transmission and switching command) is sent out to perform switching.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上述した従来の回線監視方式では、各無線システムを構
成する主要装置の機器障害およびフェージングによる伝
送品質の低下は検出することができるが、受信端局の各
現用無線システムに設置されている受信同期切替器の機
器障害を検出することはできない。受信同期切替器には
タイミング調整を行うために多数のＩＣ回路が含まれて
おシ、これらの一つが故障しても正常な切替動作ができ
なくなるが、現実に切替を行わない限シ異常が検出され
ないことが少なくない。従って、フェージングが発生し
て同期切替を行うときになって受信同期切替器の故障の
ために切替不能となシ、通信障害を発生するという問題
点がある。The conventional line monitoring method described above can detect deterioration in transmission quality due to equipment failures and fading in the main equipment that makes up each wireless system, but the reception synchronization method installed in each working wireless system at the receiving terminal station It is not possible to detect equipment failures in the switch. The reception synchronization switch includes many IC circuits for timing adjustment, and if one of these circuits fails, normal switching will not be possible, but unless switching is actually performed, there will be no abnormality. Often undetected. Therefore, there is a problem in that when fading occurs and synchronization switching is to be performed, switching is impossible due to a failure of the receiving synchronization switch, resulting in communication failure.

本発明の目的は、受信同期切替器の機器故障を早期に発
見でき、上述の問題点を解決してディジタル無線通信目
線の信頼性を向上できる回線監視方式を提供することで
ある。SUMMARY OF THE INVENTION An object of the present invention is to provide a line monitoring system that can detect device failures in a reception synchronization switch at an early stage, solve the above-mentioned problems, and improve the reliability of digital wireless communications.

〔問題を解決するだめの手段〕[Failure to solve the problem]

本発明の回線監視方式は、予備無線システムとＮ（Ｎ≧
１の整数）個の現用無線システムとの間で無ビット誤り
の同期切替を行うディジタル無線通信回線の回線監視方
式において、送信端局からあらかじめ定められたシーケ
ンスに従って前記各現用無線システムで伝送されるデー
タ信号を順次前記予備無線システムに並列に送出し、受
信端局の前記各現用無線システムに設けられた受信同期
切替器で前記各現用無線システムで伝送された第１のデ
ータ信号と前記予備無線システムを介して並列に伝送さ
れた第２のデータ信号との間の一致を検出し、あらかじ
め定められた時間内に前記第１のデータ信号と前記第２
のデータ信号との一致が得られないときに管軸ｆ６号を
送出するように構成されている。The line monitoring method of the present invention uses a standby radio system and N (N≧
In a line monitoring method for a digital wireless communication line that performs bit error-free synchronous switching with (an integer of 1) working radio systems, transmission is performed by each of the working radio systems from a transmitting terminal station according to a predetermined sequence. The data signals are sequentially sent in parallel to the backup radio system, and a reception synchronization switch provided in each of the working radio systems of the receiving terminal station selects the first data signal transmitted by each of the working radio systems and the backup radio. detecting a coincidence between a second data signal transmitted in parallel through the system, and detecting a coincidence between said first data signal and said second data signal within a predetermined time
The structure is such that the tube axis No. f6 is sent out when coincidence with the data signal cannot be obtained.

〔実施例〕〔Example〕

次に図面を参照して本発明の詳細な説明する。 Next, the present invention will be described in detail with reference to the drawings.

第１図は本発明の回線監視方式の一実施例を説明するた
めのディジタル無線通信回線の切替系のブロック図であ
る。第１図において、送信端局側の多重化端局装置（図
示せず）から送られてくるデータ信号Ｚｏｏ−１〜１０
０−ｎはそれぞれハイブリッド１で二分され、一方はバ
イポーラ符号をユニポーラ符号に変換する符号変換盤２
及び無線区間監視用の付加ピットを挿入する送１６符号
処理盤３を経て各現用無線システムＲ，ＥＧ−１〜ＲＦ
！Ｇ−ｎに送出きれ、他方は切替器４−１〜４−　ｎを
介して予備無線システムＰＲＯＴに並列に接続できるよ
うに構成されている。受信端局側においては、各現用無
線システムの受信復調出力はフレーム同期盤５．受信符
号処理盤６を経て付加ビットを除去したのち受信同期切
替器７−１〜７−　ｎに加えられ、ここで予備無線シス
テムＰＲＯＴで伝送され受信分配盤８から分岐された１
６号とのタイミン−５へ グ調整を行い、両信号の一致を確認してから同期切替が
行われるように構成されている。受信同期切替器７−１
〜７−ｎ及び受信分配盤８の出力はそれぞれ符号変換盤
９でバイポーラ符号に変換され、前者は切替器１０を経
て多重化端局装置（図示せず）に、後者はパイロット検
出器１１に送出される。なお、パイロット検出器１１は
送信端局側のパイロット発信器１２と対向して予備無線
システム系の総合監視を行う。FIG. 1 is a block diagram of a digital wireless communication line switching system for explaining an embodiment of the line monitoring system of the present invention. In FIG. 1, data signals Zoo-1 to Zoo-10 sent from a multiplexing terminal device (not shown) on the transmitting terminal side are
0-n are each divided into two by a hybrid 1, and one is a code conversion board 2 that converts bipolar code into unipolar code.
and each working radio system R, EG-1 to RF via the transmission 16 code processing board 3 which inserts additional pits for radio section monitoring.
! G-n, and the other one can be connected in parallel to the standby radio system PROT via switchers 4-1 to 4-n. On the receiving end station side, the received and demodulated output of each working radio system is transmitted through a frame synchronization board 5. After passing through the reception code processing board 6 and removing the additional bits, it is added to the reception synchronization switchers 7-1 to 7-n, where it is transmitted by the backup radio system PROT and branched from the reception distribution board 8.
The configuration is such that timing adjustment with No. 6 is performed and synchronization switching is performed after confirming that both signals match. Reception synchronization switch 7-1
The outputs of ~7-n and the reception distribution board 8 are each converted into bipolar codes by a code conversion board 9, and the former is sent to a multiplexing terminal equipment (not shown) via a switch 10, and the latter is sent to a pilot detector 11. Sent out. Note that the pilot detector 11 faces the pilot transmitter 12 on the transmitting terminal station side and performs comprehensive monitoring of the standby radio system system.

上述の構成において、フェージング発生時における現用
と予備との切替は、各無線システムの受信符号処理盤６
でパリティ誤シを検出したときに送出される切替制御信
号によシ行われる。すなわち、現用無憩システムＲＥＧ
−１にパリティｔｔｂが発生すると、送信端局側の切替
器４−１を動作させてデータ信号１００−１を現用無線
システムＲＪＧ−１と予備無線システムＰＲＯＴとに並
列に送出し、受信端局側の受信同期切替器７−１で現用
無線システムＲ）３Ｇ−１で伝送されたデータ信号１０
１と予備無線システムＰＲＯＴで並列に″″６−宕へ 伝送され受信分配盤８で分岐されたデータ信号１０２と
のタイミング調整を行い、両データ信号の一致を確認し
てからデータイＨ号１０１からデータ信号１０２に切替
える。In the above configuration, switching between active and backup when fading occurs is performed by the reception code processing board 6 of each radio system.
This is done using a switching control signal sent when a parity error is detected. In other words, the current non-stop system REG
-1, when parity ttb occurs, the switching device 4-1 on the transmitting terminal side is operated to send the data signal 100-1 to the working radio system RJG-1 and the backup radio system PROT in parallel, and the receiving terminal The reception synchronization switch 7-1 on the side receives the data signal 10 transmitted by the working wireless system R) 3G-1.
1 and the data signal 102 which is transmitted in parallel to ``6-Miya'' by the backup radio system PROT and branched by the reception distribution board 8, and after confirming the coincidence of both data signals, the data signal 101 is transmitted from the data signal 101. Switch to data signal 102.

第２図は第１図の受信同期切替器７−１の一実施例を示
すブロック図である。現用無線システムＲ，ＥＧ−１の
受信符号処理盤６から入力されるデータ信号１０１及び
予備無線システムＰＲ，ＯＴの受信分配盤８から入力さ
れるデータ信号１０２は、それぞれ分周記憶回路７１及
び７２と列順変換回路７３及び７４を経て切替回路７５
に接続され、切替信号１０３によって切替えられた符号
変換盤９に送シ出される。分周記憶回路７１．７２はＮ
分周した位相の異なるＮ個のクロック信号で入力信号を
順次読み出し、更に同一周波数（Ｎ分周した周波数）の
共通のクロック信号で耽み替えてＮ個の並列信号として
一時記憶する回路でアシ、列順変換回路７３．７４は上
記Ｎ個の並列信号を元の周波数のクロック信号で読み出
すときの耽み出し順序をずらせることによシ、分周記憶
回路の入力信号のビットタイミングの調整を行う回路で
ある。列順変換回路７３．’１４の出力はそれぞれ分岐
してビット照合回路７６に加えられ、各ビットごとの符
号照合を行って、一定長の符号のすべてが一致したとき
に一致信号１０４を送出する。フェージングによる回線
障害を防止するため同期切替を行う場合には、切替制御
装置で上述の一致信号１０４が確認されると切替信号１
０３が入力され切替が行われる。なお、切替スイッチ７
７は列順変換回路の読み出し順序の変換動作の切替を行
うスイッチであシ、現用無線システムから予備無線シス
テムへの切替を行うときは予備無線システム側の列順変
換回路７４でタイミング調整を行い、予備無線システム
に切シ替わったのちは逆に現用無線システム側の列順変
換回路７３でタイミング調整を行うためのものである。FIG. 2 is a block diagram showing an embodiment of the reception synchronization switch 7-1 shown in FIG. 1. Data signals 101 input from the reception code processing boards 6 of the working radio systems R and EG-1 and data signals 102 input from the reception distribution boards 8 of the backup radio systems PR and OT are stored in frequency division storage circuits 71 and 72, respectively. and a switching circuit 75 via column order conversion circuits 73 and 74.
and is sent to the code conversion board 9 switched by the switching signal 103. The frequency division memory circuits 71 and 72 are N
A circuit uses a circuit that sequentially reads input signals using N divided clock signals with different phases, and then uses a common clock signal of the same frequency (N divided frequency) to temporarily store them as N parallel signals. , the column order conversion circuits 73 and 74 adjust the bit timing of the input signal of the frequency division storage circuit by shifting the order of reading out the N parallel signals using the clock signal of the original frequency. This is a circuit that performs the following. Column order conversion circuit 73. The outputs of '14 are branched and applied to a bit matching circuit 76, which performs code matching for each bit, and sends out a match signal 104 when all codes of a certain length match. When performing synchronous switching to prevent line failures due to fading, when the above-mentioned coincidence signal 104 is confirmed by the switching control device, the switching signal 1 is
03 is input and switching is performed. In addition, the changeover switch 7
Reference numeral 7 denotes a switch for switching the readout order conversion operation of the column order conversion circuit. When switching from the working radio system to the backup radio system, the column order conversion circuit 74 on the backup radio system side adjusts the timing. After switching to the standby radio system, the column order conversion circuit 73 on the working radio system side performs timing adjustment.

本発明の回線監視方式は、パリティ誤シが検出されない
正常運用時に、切替制御装置からの制御信号によシ、各
現用無線システムのデータ信号をあらかじめ定められた
一定のシーケンスに従って１１次子備無線システムＰＲ
ＯＴに並列に送出し、分周記憶回路７２１列順変換回路
７４を通してタイミング調整されたデータ信号を、各無
線システムで伝送されたデータ信号とビット照合回路７
６で比較し、一致信号１０４が得られればこれらの回路
の動作は正常であると判断する。もちろん、このとき切
替信号１０３は入力されず実際の切替は行われない。こ
れに反して、一定の時間（列順変換回路で列順の変更を
行ってビット照合を行う時間）経過しても一致信号１０
４が得られなりときは、いずれかの回路動作に異常があ
ると判断されるので、警報信号を送出して異常を知らせ
るように構成されている。従って、実際にフェージング
が発生して切替を行う以前に、早期に受信同期切替器の
機器故障を発見することができ、ディジタル無線通信回
線の信頼性が向上される。上述の監視動作は、受信同期
切替器の機器故障の検出を目的とするものであるから、
連続して繰シ返し行う必要はなく、適当な時間間隔をお
いて定期的に繰シ返すようにすればよい。もちろん、フ
ェージングによる切替が必要なときは、監視動作を直ち
に中止して切替動作に移行することとなる。In the line monitoring method of the present invention, during normal operation when no parity error is detected, the data signals of each working radio system are sent to the 11th secondary radio according to a predetermined sequence according to the control signal from the switching control device. System PR
The data signal sent in parallel to the OT and whose timing has been adjusted through the frequency division storage circuit 721 and the column order conversion circuit 74 is matched with the data signal transmitted by each wireless system by the bit comparison circuit 7.
6, and if a match signal 104 is obtained, it is determined that these circuits are operating normally. Of course, at this time, the switching signal 103 is not input and actual switching is not performed. On the other hand, even if a certain period of time (the time to change the column order in the column order conversion circuit and perform bit matching) has passed, the coincidence signal 10
If 4 is not obtained, it is determined that there is an abnormality in the operation of one of the circuits, and the system is configured to send out an alarm signal to notify of the abnormality. Therefore, before fading actually occurs and switching is performed, a device failure in the reception synchronization switch can be discovered at an early stage, and the reliability of the digital wireless communication line is improved. Since the above-mentioned monitoring operation is aimed at detecting equipment failure of the reception synchronization switch,
It is not necessary to repeat the process continuously, but it is sufficient to repeat it periodically at appropriate time intervals. Of course, when switching due to fading is required, the monitoring operation is immediately stopped and the switching operation is started.

本発明の回線監視方式は、上述した第１図の切替系の構
成に限定されるものではなく、同期切替を送信符号処理
盤および受信符号処理盤の内側で行う場合、すなわち、
予備無線システムの送信符号処理盤３の後に送信同期切
替器が挿入され、受信同期切替器が受信符号処理盤６の
前に設けられている切替系にも適用できることは言うま
でもない。又、予備無線システムが１システムの場合を
説明したが、２システム以上の場合も同様である。The line monitoring system of the present invention is not limited to the configuration of the switching system shown in FIG.
Needless to say, the present invention can also be applied to a switching system in which a transmission synchronization switch is inserted after the transmission code processing board 3 of a backup radio system and a reception synchronization switch is provided before the reception code processing board 6. Further, although the case where there is one standby radio system has been described, the same applies to the case where there are two or more systems.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明の回線監視方式によれば、
受信同期切替器の機器故障を早期に検出することがで、
き、フェージングが発生して実際に切替えを行う時に異
常を発見して切替不能となる事態を防止し、ディジタル
無線通信回線の信頼性を向上できる効果がある。As explained above, according to the line monitoring method of the present invention,
By early detection of equipment failure of the reception synchronization switch,
This has the effect of improving the reliability of digital wireless communication lines by preventing a situation where fading occurs and an abnormality is discovered during actual switching and switching becomes impossible.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例を説明するためのディジタル
無線通値回線の切替系の構成を示すブロック図、第２図
は第１図の受信同期切替器の一実施例のブロック図であ
る。 １・・・・・・ハイブリッド、２，９・・・・・・符号
変挨盤、３・・・・・・送イ■符号処理盤、４−１．４
−ｎ、１０・・・・・・切替器、５・・・・・・フレー
ム同期盤、ｌｌ・・・・・・パイロット検出器、１２・
・・・・・バイｐット発倍器、７１゜７２・・・・・・
分周記憶回路、７３．７４・・・・・・列順変換回路、
７５・・・・・・切替回路、７６・・・・・・ビット照
合回路、７７・・・・・・切替スイッチ。FIG. 1 is a block diagram showing the configuration of a switching system of a digital wireless communication line for explaining an embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the reception synchronization switch of FIG. 1. be. 1...Hybrid, 2,9...Code change board, 3...Transmission ■ Code processing board, 4-1.4
-n, 10...Switcher, 5...Frame synchronization board, ll...Pilot detector, 12...
...Biput multiplier, 71°72...
Frequency division storage circuit, 73.74...column order conversion circuit,
75...Switching circuit, 76...Bit verification circuit, 77...Switching switch.

Claims (1)

【特許請求の範囲】[Claims] 予備無線システムとＮ（Ｎ≧１の整数）個の現用無線シ
ステムとの間で無ビット誤りの同期切替を行うディジタ
ル無線通信回線の回線監視方式において、送信端局から
あらかじめ定められたシーケンスに従って前記各現用無
線システムで伝送されるデータ信号を順次前記予備無線
システムに並列に送出し、受信端局の前記各現用無線シ
ステムに設けられた受信同期切替器で前記各現用無線シ
ステムで伝送された第１のデータ信号と前記予備無線シ
ステムを介して並列に伝送された第２のデータ信号との
間の一致を検出し、あらかじめ定められた時間内に前記
第１のデータ信号と前記第２のデータ信号との一致が得
られないときに警報信号を送出することを特徴とする回
線監視方式。In a line monitoring method for a digital wireless communication line that performs synchronous switching with no bit errors between a backup wireless system and N (an integer of N≧1) working wireless systems, The data signals transmitted by each working radio system are sequentially sent in parallel to the backup radio system, and the reception synchronization switch provided in each working radio system of the receiving terminal station transmits the data signals transmitted by each working radio system. detecting a coincidence between one data signal and a second data signal transmitted in parallel via the standby wireless system, and detecting a coincidence between the first data signal and the second data signal transmitted in parallel through the backup wireless system; A line monitoring method that is characterized by sending out an alarm signal when a signal cannot be matched.