JPS61230451A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS61230451A
JPS61230451A JP60071427A JP7142785A JPS61230451A JP S61230451 A JPS61230451 A JP S61230451A JP 60071427 A JP60071427 A JP 60071427A JP 7142785 A JP7142785 A JP 7142785A JP S61230451 A JPS61230451 A JP S61230451A
Authority
JP
Japan
Prior art keywords
signal
frame synchronization
error rate
transmission
frame synchronizing
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
Application number
JP60071427A
Other languages
Japanese (ja)
Inventor
Isao Matsuoka
松岡 勲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP60071427A priority Critical patent/JPS61230451A/en
Publication of JPS61230451A publication Critical patent/JPS61230451A/en
Pending legal-status Critical Current

Links

Landscapes

  • Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
  • Dc Digital Transmission (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To supervise an error rate at each plural transmission lines split by an intermediate repeater by allowing at least one set in intermediate repeaters to extract a frame synchronizing signal from a transmission signal to detect the error rate and sending the frame synchronizing signal of the transmission signal in place of a new frame synchronizing signal recovered from the transmission signal. CONSTITUTION:A signal inputted to an input terminal 11 from a transmission line is subject to frame synchronization by a frame synchronizing circuit 12 in an intermediate repeater 300, only the frame synchronizing signal is extracted by a frame synchronizing signal detection circuit 13 and the result is sent to an error rate detection circuit 14. The error rate detection circuit 14 identifies whether or not the frame synchronizing signal is in error to detect the error rate of the transmission line between a terminal device 100 and the repeater 300. The signal inputted to the input terminal 11 is sent further to a frame synchronizing signal insertion circuit 16, after a new frame synchronizing signal formed by a frame synchronizing signal generating circuit 15 is inserted, the result is outputted to a transmission line 200 from the output terminal 17.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は2つの端局装置にはさまれる伝送路が中間中継
装置によって複数の伝送路に分割され、伝送路を伝送さ
れる信号の符号形式がmBnB符号でオシ、且つ伝送路
を伝送される信号中に規則的な間隔でフレーム同期信号
が含まれているデータ伝送方式に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to dividing a transmission line between two terminal equipment into a plurality of transmission lines by an intermediate repeater, and determining the code of a signal transmitted through the transmission line. The present invention relates to a data transmission system in which the format is an mBnB code, and a frame synchronization signal is included at regular intervals in a signal transmitted over a transmission path.

〔従来の技術〕[Conventional technology]

従来、伝送路を伝送される信号の符号形式としてmBn
B符号(m(n)を採用しているデータ伝送システムの
中間中継装置はmBnB符号(m(n)のランニング・
ディスパリティを監視する事により伝送路の誤り率金覧
視していた。
Conventionally, mBn was used as a code format for signals transmitted through a transmission line.
An intermediate relay device of a data transmission system that uses a B code (m(n)) is a running
By monitoring disparity, the error rate of the transmission line was monitored.

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

従来の各中間中継装置におけるmBnB符号(m(n)
のランニング・ディスパリティを監視する事によプ伝送
路の誤り率を監視する方式では、伝送路に中間中継装置
が2台以上設置される場合、各中間中継装置は中間中継
装置により複数の伝送路に分割された各伝送路毎の誤り
率を監視する事はできず、端局装置から各中間中継装置
までの伝送路全体の誤り率しか監視できないので信頼性
が低いという欠点を有していた。
The mBnB code (m(n)
In the method of monitoring the error rate of a loop transmission line by monitoring the running disparity of It is not possible to monitor the error rate of each divided transmission path, but only the error rate of the entire transmission path from the terminal equipment to each intermediate relay device, so it has the disadvantage of low reliability. Ta.

〔問題点を解決するための手段〕[Means for solving problems]

本発明のデータ伝送方式は、第一の端局装置において、
mBnB符号信号にフレーム同期信号を挿入した送信信
号を送出し、前記送信信号を複数台の中間中継装置およ
び伝送路によって再生中継伝送した信号を第二の端局装
置において受信し、この受信信号から前記第二の端局装
置においてフレーム同期信号を抽出してその誤り率を検
出し、前記受信信号から前記第二の端局装置においてm
BnB符号信号を抽出してその19皐を検出するデータ
伝送方式において、前記中間中継装置の少なくとも一台
が、前記送信信号からフレーム同期信号を抽出してその
!14カ率を検出し、前記送信信号から再生した新しい
フレーム同期信号に前記送信信号のフレーム同期信号を
代えて送出するようにしたことを特徴とするものである
In the data transmission system of the present invention, in the first terminal device,
A transmission signal obtained by inserting a frame synchronization signal into an mBnB code signal is sent out, a signal obtained by reproducing and relaying the transmission signal through a plurality of intermediate relay devices and transmission lines is received at a second terminal device, and from this received signal The second terminal equipment extracts the frame synchronization signal and detects its error rate, and the second terminal equipment extracts the frame synchronization signal and detects the error rate thereof.
In a data transmission system that extracts a BnB code signal and detects its 19th line, at least one of the intermediate relay devices extracts a frame synchronization signal from the transmission signal and detects the frame synchronization signal. 14, and a new frame synchronization signal reproduced from the transmission signal is sent instead of the frame synchronization signal of the transmission signal.

〔実施例〕〔Example〕

次に本発明について図面を参照して詳細に説明する。 Next, the present invention will be explained in detail with reference to the drawings.

第1図は本発明の一実施例を示すブロック図である。ま
ず初めに端局装置100ではフレーム同期信号発生回路
3で作られたフレーム同期信号はフレーム同期信号挿入
回路2で入力端子1から入力されたmBn B符号信号
中の決められた位置に挿入され出力端子4から伝送路2
00に出力される。
FIG. 1 is a block diagram showing one embodiment of the present invention. First, in the terminal device 100, the frame synchronization signal generated by the frame synchronization signal generation circuit 3 is inserted into the mBn B code signal input from the input terminal 1 by the frame synchronization signal insertion circuit 2 at a predetermined position and output. Transmission line 2 from terminal 4
Output as 00.

逆に伝送路200から入力端子5に入力された信号はフ
レーム同期回路6でフレーム同期がとられ、その後フレ
ーム同期信号抽出回路7で入力された信号の中からフレ
ーム同期信号のみが抽出され、その抽出されたフレーム
同ルj信号は誤り率検出回路8に送られる。誤り率検出
回路8はフレーム同期信号抽出回路7から送られて米た
フレーム同期信号が誤っているかどうかを識別し、端局
装置100と中間中継装置3000間の伝送路200の
誤り率を検出する。さらに入力端子5に入力された信号
はmBnB符号信号抽出回路9でフレーム同期信号がの
ぞかれmBnB符号信号のみが誤り率検出回路10に送
られる。誤り率検出回路10はmBnB符号信号抽出回
路9から送られて来たmHnB符号信号を元の信号に復
号化すると同時にm B n B符号化規則の乱れを検
出し、端wJ装置間にはさまれる伝送路全体の誤り率を
検出する。
Conversely, the signal input from the transmission line 200 to the input terminal 5 is frame synchronized by the frame synchronization circuit 6, and then only the frame synchronization signal is extracted from the input signals by the frame synchronization signal extraction circuit 7. The extracted frame rate j signal is sent to the error rate detection circuit 8. The error rate detection circuit 8 identifies whether or not the frame synchronization signal sent from the frame synchronization signal extraction circuit 7 is erroneous, and detects the error rate of the transmission path 200 between the terminal device 100 and the intermediate relay device 3000. . Furthermore, the frame synchronization signal is removed from the signal input to the input terminal 5 by an mBnB code signal extraction circuit 9, and only the mBnB code signal is sent to an error rate detection circuit 10. The error rate detection circuit 10 decodes the mHnB code signal sent from the mBnB code signal extraction circuit 9 into the original signal, and at the same time detects a disturbance in the mBnB encoding rule, and detects the disturbance between the end wJ devices. The error rate of the entire transmission path is detected.

次に中間中継装置300では伝送路から入力端子11に
入力された信号はフレーム同期回路12でフレーム同期
がとられその後7レーム同期信号検出回路13で人力さ
れた信号の中からフレーム同期信号のみが抽出され七の
抽出されたフレーム同期信号は誤り率検出回路14に送
られる。誤り車検出回路14はフレーム同期信号抽出回
路13から送られて米たフレーム四M1ぎ号が職ってい
るかどうかを識別し烟局襞[100と中間中継装置30
0の間の伝送路の誤υ軍を検出する。入力端子11に入
力され7’C%1号はさらにフレーム同期信号押入回路
16に送られフレーム同期信号発生回路15で作られた
新しいフレーム同期信号を、入力端子11から送られて
来た信号の中に含まれているフレーム同期信号のかわシ
に挿入した後出力端子17から伝送路200に出力され
る。
Next, in the intermediate relay device 300, the signal input from the transmission line to the input terminal 11 is subjected to frame synchronization in the frame synchronization circuit 12, and then only the frame synchronization signal is detected from among the manually input signals in the 7-frame synchronization signal detection circuit 13. The seven extracted frame synchronization signals are sent to the error rate detection circuit 14. The erroneous vehicle detection circuit 14 identifies whether or not the frame number 4 M1 sent from the frame synchronization signal extraction circuit 13 is active, and detects whether or not the frame 4 M1 is valid.
Detect errors in the transmission path between 0 and υ. The 7'C% No. 1 input to the input terminal 11 is further sent to the frame synchronization signal intrusion circuit 16, and the new frame synchronization signal generated by the frame synchronization signal generation circuit 15 is added to the signal sent from the input terminal 11. After being inserted into the frame synchronization signal included therein, the signal is output from the output terminal 17 to the transmission line 200.

〔発明の効果〕〔Effect of the invention〕

以上の説明で明らかなように、本発明によれば、従来の
伝送路の監視方式では伝送路に中間中継装置が複数個設
置される場合、各中間中継装置は中間中継装置によシ複
数の伝送路に分割された各伝送路毎の誤り率を監視する
事ができないという欠点を解決し、中間中継装置よシ分
割された複数の伝送路毎の誤9率も監視でき、さらに端
局装置間にはさまれる伝送路全体の誤)率も監視できる
ので信頼性が高いという効果がある。
As is clear from the above description, according to the present invention, when a plurality of intermediate relay devices are installed on a transmission path in the conventional transmission path monitoring method, each intermediate relay device This solves the drawback that it is not possible to monitor the error rate of each divided transmission path, and it is also possible to monitor the error rate of each divided transmission path from the intermediate relay device. Since the error rate of the entire transmission line sandwiched between them can also be monitored, reliability is high.

【図面の簡単な説明】 第1図は本発明の一実施例を示すブロック図である。 1・・・・・・m B n B符号信号の入力端子、2
・・・・・・フレーム同期信号挿入回路、3・・・・・
・フレーム四期信号発生回路、4・・・・・・伝送路へ
の出力端子、5・・・・・・伝送路からの入力端子、6
・・・・・・フレーム同期回路、7・・・・・・フレー
ム同期信号抽出回路、8・・・・・・gb率検出(ロ)
路、9・・・−・・mBnB符号信号抽出回路、10・
・・・・・誤り率検出回路、11・・・・・・伝送路か
らの入力端子、12・・・・・・フレーム同期回路、1
3・・・・・・フレーム同期信号抽出回路、14・・・
・・・誤り率検出回路、15・・・・・・フレーム同期
信号発生回路、16・・・・・・フレーム同期信号挿入
回路、17・・・・・・伝送路への出力端子。
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention. 1...m Bn B code signal input terminal, 2
...Frame synchronization signal insertion circuit, 3...
・Frame quarter signal generation circuit, 4...Output terminal to the transmission line, 5...Input terminal from the transmission line, 6
...Frame synchronization circuit, 7...Frame synchronization signal extraction circuit, 8...Gb rate detection (b)
road, 9...-mBnB code signal extraction circuit, 10.
...Error rate detection circuit, 11...Input terminal from transmission path, 12...Frame synchronization circuit, 1
3... Frame synchronization signal extraction circuit, 14...
...Error rate detection circuit, 15...Frame synchronization signal generation circuit, 16...Frame synchronization signal insertion circuit, 17...Output terminal to transmission path.

Claims (1)

【特許請求の範囲】[Claims] 第一の端局装置において、mBnB符号信号(m<n)
にフレーム同期信号を挿入した送信信号を送出し、前記
送信信号を複数台の中間中継装置および伝送路によって
再生中継伝送した信号を第二の端局装置において受信し
、この受信信号から前記第二の端局装置においてフレー
ム同期信号を抽出してその誤り率を検出し、前記受信信
号から前記第二の端局装置においてmBnB符号信号を
抽出してその誤り率を検出するデータ伝送方式において
、前記中間中継装置の少なくとも一台が、前記送信信号
からフレーム同期信号を抽出してその誤り率を検出し、
前記送信信号から再生した新しいフレーム同期信号に前
記送信信号のフレーム同期信号を代えて送出するように
したことを特徴とするデータ伝送方式。
In the first terminal device, mBnB code signal (m<n)
A transmission signal with a frame synchronization signal inserted therein is sent out, a signal obtained by reproducing and relaying the transmission signal through a plurality of intermediate relay devices and a transmission path is received at a second terminal device, and a second terminal device receives a signal from which a frame synchronization signal is inserted. In the data transmission method, the frame synchronization signal is extracted and the error rate thereof is detected in the terminal station device, and the mBnB code signal is extracted and the error rate thereof is detected from the received signal in the second terminal station device. at least one of the intermediate relay devices extracts a frame synchronization signal from the transmission signal and detects its error rate;
A data transmission system characterized in that a new frame synchronization signal reproduced from the transmission signal is sent instead of the frame synchronization signal of the transmission signal.
JP60071427A 1985-04-04 1985-04-04 Data transmission system Pending JPS61230451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60071427A JPS61230451A (en) 1985-04-04 1985-04-04 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60071427A JPS61230451A (en) 1985-04-04 1985-04-04 Data transmission system

Publications (1)

Publication Number Publication Date
JPS61230451A true JPS61230451A (en) 1986-10-14

Family

ID=13460200

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60071427A Pending JPS61230451A (en) 1985-04-04 1985-04-04 Data transmission system

Country Status (1)

Country Link
JP (1) JPS61230451A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03265231A (en) * 1990-03-14 1991-11-26 Nec Corp Repeating installation
EP0503486A2 (en) * 1991-03-14 1992-09-16 Alcatel SEL Aktiengesellschaft Line monitoring for SDH-signals

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03265231A (en) * 1990-03-14 1991-11-26 Nec Corp Repeating installation
EP0503486A2 (en) * 1991-03-14 1992-09-16 Alcatel SEL Aktiengesellschaft Line monitoring for SDH-signals
US5432796A (en) * 1991-03-14 1995-07-11 Alcatel N. V. Line Monitoring for SDH signals

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