【発明の詳細な説明】〔概 要〕ローカルエリアネットワークにおける障害発見方法に関
し、ローカルエリアネットワークにおける伝送路と送受信装
置の障害個所の切り分けと限定を行う回路の提供を目的
とし、上流のデータ送受信装置からのデータを伝送路を介して
受信する第一受信部と、該第一受信部の出力と自装置デ
ータの処理を行う処理部と、該処理部からの出力を下流
のデータ送受信装置に対して伝送路を介し送出する送信
部とを具備したデータ送受信装置において、前記第一受
信部と同一機能を有する第二受信部と、前記伝送路から
のデータと前記送信部の出力を折り返し入力したデータ
の中の一つを選択し、選択結果を第一受信部へ出力する
第一選択部と、前記伝送路からのデータと前記送信部の
出力を折り返したデータの中の一つを選択し、選択結果
を第二受信部へ出力するように前記第一選択部に並列に
接続した第二選択部とを設け、前記第一選択部と第二選
択部は互いに異なるデータを選択して出力し、かつ第一
受信部または第二受信部でエラーを検出した場合は、前
記第一選択部と第二選択部の選択データを互いに切り換
えて第一受信部または第二受信部にてデータを受信する
ことにより障害の切り分けを可能なるように構成する。[Detailed Description of the Invention] [Summary] Regarding a fault detection method in a local area network, the present invention aims to provide a circuit for isolating and limiting the location of a fault in a transmission path and a transmitting/receiving device in a local area network. a first receiving section that receives data from the first receiving section via a transmission path, a processing section that processes the output of the first receiving section and its own data, and a processing section that processes the output from the processing section to a downstream data transmitting/receiving device. A data transmitting/receiving device comprising a second receiving section having the same function as the first receiving section, and a second receiving section having the same function as the first receiving section, and inputting the data from the transmission path and the output of the transmitting section by loopback. a first selection section that selects one of the data and outputs the selection result to the first reception section; and a first selection section that selects one of the data and outputs the selection result to the first reception section; , a second selection section connected in parallel to the first selection section so as to output the selection result to a second reception section; the first selection section and the second selection section select and output different data from each other; And if an error is detected in the first receiving section or the second receiving section, the selection data of the first selection section and the second selection section are switched to each other and the data is transferred to the first receiving section or the second receiving section. The configuration is such that it is possible to isolate the failure by receiving the information.
本発明は、ローカルエリアネットワークにおける障害発
見方法に関する。The present invention relates to a fault detection method in a local area network.
ローカルエリアネットワーク（以下ＬＡＮと称す）にお
いて、伝送路障害の自己診断や原因の切り分けを行う事
は現在、非常に困難視されている。In local area networks (hereinafter referred to as LANs), it is currently considered extremely difficult to self-diagnose transmission path failures and isolate the cause.
このため、前記伝送路の障害個所の切り分は自動的に行
える回路の提供が望まれている。Therefore, it is desired to provide a circuit that can automatically isolate the faulty portion of the transmission line.
第３図は従来の一実施例の回路構成を示す図である。図
中、６は第一データ送受信装置、７は第二データ送受信
装置、８は第三データ送受信装置である。また６０．７
０．８０はそれぞれの上流のデータ送受信装置から伝送
路９ａ、９ｂ、９ｃを介して送られてきたデータを受信
する受信部であり、第一データ送受信装置６、第二デー
タ送受信装置７、第三データ送受信装置８にそれぞれ設
けたものである。FIG. 3 is a diagram showing a circuit configuration of a conventional embodiment. In the figure, 6 is a first data transmitting/receiving device, 7 is a second data transmitting/receiving device, and 8 is a third data transmitting/receiving device. Also 60.7
0.80 is a receiving unit that receives data sent from each upstream data transmitting/receiving device via transmission paths 9a, 9b, and 9c, and includes a first data transmitting/receiving device 6, a second data transmitting/receiving device 7, and a second data transmitting/receiving device 7. The three data transmitting/receiving devices 8 are each provided with one.
なお同様に６１．７１．８１はそれぞれの送信部であり
、伝送路９ａ、９ｂ、９ｃを介して下流に接続されてい
るそれぞれのデータ送受信装置に対しデータを送出する
送信部である。更に６２．７２．８２はそれぞれの受信
部６０．７０．８０からのデータを処理したのち、それ
ぞれの送信部６１．７１．８１に対し送出する処理部で
ある。Similarly, reference numerals 61, 71, and 81 are respective transmitting units, which transmit data to respective data transmitting/receiving devices connected downstream via transmission paths 9a, 9b, and 9c. Furthermore, 62, 72, 82 are processing units that process the data from the respective receiving units 60, 70, 80 and then send the data to the respective transmitting units 61, 71, 81.
上記のような回路構成において、例えば第二データ送受
信装置７の受信部７０で障害が発生したと検知された場
合の対処方法は、以下の通りである。In the circuit configuration as described above, for example, a countermeasure when it is detected that a failure has occurred in the receiving section 70 of the second data transmitting/receiving device 7 is as follows.
＋１１ 第一データ送受信装置６の送信部６１の出力
端６ ■と伝送路９ｂとの接続点×を外し、例えば出力
端のにレベルメータを接続してレベルが正常かを確認す
る。異常な場合は第一データ送受信装置６および該装置
６以前の障害と判断する。+11 Disconnect the connection point x between the output end 6 of the transmitter 61 of the first data transmitter/receiver 6 and the transmission line 9b, and check whether the level is normal by connecting a level meter, for example, to the output end. If there is an abnormality, it is determined that there is a failure in the first data transmitting/receiving device 6 and before the first data transmitting/receiving device 6.
（２）前記（１）が正常なる場合は、第二データ送受信
＆ 装？！ｆ７の受信部７０の入力端■と伝送路９ｂと
の接続点×を外し、例えばレベルメータを用いて伝送路
９ｂからの入力レベルが正常かを確認する。異常な場合
は、伝送路９ｂの障害と判断する。(2) If the above (1) is normal, is the second data transmission/reception & installation? ! Disconnect the connection point x between the input terminal 2 of the receiving section 70 of f7 and the transmission line 9b, and use, for example, a level meter to check whether the input level from the transmission line 9b is normal. If there is an abnormality, it is determined that there is a failure in the transmission line 9b.
（３）前記（２）が正常なる場合は、第一データ送受信
ａ 装Ｗ６の送信部６１を交換して第二データ送受信装
置７の受信部７０が正常に動作することを確認する。(3) If the above (2) is normal, replace the transmitting section 61 of the first data transmitting/receiving device W6 and confirm that the receiving section 70 of the second data transmitting/receiving device 7 operates normally.
（４）前記（３）が正常なる場合は、第二データ送受信
装置７の受信部７０を交換して正常に動作することを確
認する。(4) If the above (3) is normal, replace the receiving section 70 of the second data transmitting/receiving device 7 and confirm that it operates normally.
上記したように、例えばローカルエリアネットワークを
用いた伝送路において伝送路障害が発生した際は、人の
操作により障害発生個所を切り分けして障害個所の発見
を行っており、特に伝送路の自動診断や、伝送路障害の
自動障害発見等を行っていない。As mentioned above, for example, when a transmission line failure occurs in a transmission line using a local area network, the failure point is isolated and found by human operation, and in particular automatic diagnosis of the transmission line is used. , automatic failure detection of transmission path failures, etc.
〔発明が解決しようとする課題〕従って伝送路障害が発生した場合において、１、送信を
行っている送信部の障害２、受信を行っている受信部の障害３、伝送路線の障害等が原因として考えられる。然しこの伝送路障害からこ
れらの発生個所を限定することが困難であるという問題
がある。[Problem to be Solved by the Invention] Therefore, when a transmission line failure occurs, the cause is 1) a failure in the transmitting unit that is transmitting, 2) a failure in the receiving unit that is receiving, 3) a failure in the transmission line, etc. It can be considered as However, there is a problem in that it is difficult to limit the location where these transmission path failures occur.
本発明は、ローカルエリアネットワークにおける伝送路
と送受信装置の障害個所の切り分けと限定を行う回路の
提供を目的とする。An object of the present invention is to provide a circuit for isolating and limiting failure points in transmission paths and transmitting/receiving devices in a local area network.
本発明では 上流のデータ送受信装置からのデータを伝
送路２ａを介して受信する第一受信部１１と、該第一受
信部１１の出力と自装置データの処理を行う処理部１６
と、該処理部１６からの出力を下流のデータ送受信装置
に対して伝送路２ｂを介し送出する送信部１３とを具備
したデータ送受信装置１において、前記第一受信部１１
と同一機能を有する第二受信部１２と、前記伝送路２ａ
からのデータと前記送信部１３の出力を折り返し入力し
たデータの中の一つを選択し、選択結果を第一受信部ｌ
ｌへ出力する第一選択部１４と、前記伝送路２ａからの
データと前記送信部１３の出力を折り返したデータの中
の一つを選択し、選択結果を第二受信部１２へ出力する
ように前記第一選択部１４に並列に接続した第二選択部
１５とを設け、前記第一選択部１４と第二選択部１５は
互いに異なるデータを選択して出力し、かつ第一受信部
１１または第二受信部１２でエラーを検出した場合は、
前記第一選択部１４と第二選択部１５の選択データを互
いに切り換えて第一受信部１１または第二受信部１２に
てデータを受信することにより障害の切り分けを可能に
した構成とするものである。The present invention includes a first receiving section 11 that receives data from an upstream data transmitting/receiving device via the transmission path 2a, and a processing section 16 that processes the output of the first receiving section 11 and its own device data.
and a transmitting unit 13 that transmits the output from the processing unit 16 to a downstream data transmitting/receiving device via a transmission path 2b, the first receiving unit 11
a second receiving section 12 having the same function as that of the transmission line 2a;
, and the output of the transmitter 13, and selects one of the input data, and sends the selection result to the first receiver l.
The first selection unit 14 outputs the data to the transmission line 2a and the output of the transmission unit 13, and selects one of the data and outputs the selection result to the second reception unit 12. is provided with a second selection section 15 connected in parallel to the first selection section 14, the first selection section 14 and the second selection section 15 select and output mutually different data, and the first selection section 11 Or, if an error is detected in the second receiving section 12,
The configuration is such that the selection data of the first selection section 14 and the second selection section 15 are mutually switched and the data is received by the first reception section 11 or the second reception section 12, thereby making it possible to isolate the fault. be.
本発明では第１図に示す如く、データ送受信装置ｌから
の送信データを折り返して第二選択部１５を介して第二
受信部１２で受信し、前記第二受信部１２でエラーを検
出した際、送信データの折り返しを第一選択部１４を用
いて第一受信部１１に切り替えてエラーの検出が第一受
信部１１で行われた場合、送信部１３の障害と判断し、
送信データを保証するようにしている。更にまた上流の
データ送受信装置の送信部でも同様の回路で送信データ
を保証するようにしており、これを受信する第一受信部
１１でエラーを検出した場合、第二受信部１２の不良か
または伝送路２ａ上のどちらかが障害を起こしているか
の切り分けを行っている。In the present invention, as shown in FIG. 1, when the transmitted data from the data transmitting/receiving device 1 is looped back and received by the second receiving section 12 via the second selecting section 15, and when the second receiving section 12 detects an error, , if the return of the transmitted data is switched to the first receiving unit 11 using the first selecting unit 14 and an error is detected in the first receiving unit 11, it is determined that there is a failure in the transmitting unit 13,
The transmitted data is guaranteed. Furthermore, the transmission section of the upstream data transmitting/receiving device also guarantees the transmitted data using a similar circuit, and if an error is detected in the first receiving section 11 that receives this, it is determined that the second receiving section 12 is defective or It is determined which one of the transmission lines 2a is causing a failure.
従って、第一受信部１１と第二受信部１２の切り換えを
行うことにより、障害個所が自装置の上流側か、または
自装置の第一受信部１１または送信部１３のいずれかの
限定を可能としている。Therefore, by switching between the first receiving section 11 and the second receiving section 12, it is possible to limit the fault to the upstream side of the own device or to either the first receiving section 11 or the transmitting section 13 of the own device. It is said that
第２図は本発明の一実施例の回路構成を示す図である０
図中、３は第一データ送受信装置であり、上流のデータ
送受信装置からのデータまたは下流のデータ送受信装置
へ送出される送信部３３からデータのどちらかを受信す
る第一受信部３１と、下流のデータ送受信装置に対して
のデータを送出する送信部３３と、第一受信部３１から
のデータまたは送信部３３から第二受信部３２に入力し
て第二受信部３２から出力されたデータおよび自装置デ
ータの二つのデータの処理を行う処理部３７よりなる回
路、及び本発明の回路としての伝送路５ａからのデータ
と送信部３３からのデータを切替選択して何れか一つの
データを出力する並列構成の第一選択部３４と第二選択
部３５、前記第一受信部３１と切り換え使用されかつ送
信部３３から送出されるデータの監視の役割をする第二
受信部３２、および第一受信部３１と第二受信部３２か
らのデータを切替えて処理部３７に対して出力する第三
選択部３６より構成されている。FIG. 2 is a diagram showing a circuit configuration of an embodiment of the present invention.
In the figure, 3 is a first data transmitting/receiving device, which includes a first receiving section 31 that receives either data from an upstream data transmitting/receiving device or data from a transmitting section 33 sent to a downstream data transmitting/receiving device, and a downstream data transmitting/receiving device. a transmitting section 33 that sends data to the data transmitting/receiving device; and a transmitting section 33 that transmits data to the data transmitting/receiving device; A circuit consisting of a processing section 37 that processes two data of the own device data, and a circuit of the present invention that switches between data from the transmission path 5a and data from the transmission section 33 and outputs either one of the data. a first selection section 34 and a second selection section 35 having a parallel configuration, a second reception section 32 which is used in conjunction with the first reception section 31 and serves to monitor data transmitted from the transmission section 33; It is composed of a third selection section 36 that switches data from the reception section 31 and the second reception section 32 and outputs the same to the processing section 37.
また４は第二データ送受信装置であり、前記第一データ
送受信装置３と同一の構成を有した装置であり、単に説
明の便宜のためにそれぞれには異なった記号を付与して
いる。なお５ａ、５ｂ、５ｃはそれぞれの上流および下
流のデータ送受信装置とのデータの通路となる伝送路で
ある。なお第一受信部３１゜４１、または第二受信部３
２．４２でエラーを検出した場合に制御信号を第一選択
部３４．４４と第二選択部３５．４５に出力して受信デ
ータの切り換えを行う。Reference numeral 4 denotes a second data transmitting/receiving device, which has the same configuration as the first data transmitting/receiving device 3, and different symbols are given to each for convenience of explanation. Note that 5a, 5b, and 5c are transmission lines serving as data paths with respective upstream and downstream data transmitting/receiving devices. Note that the first receiving section 31゜41 or the second receiving section 3
If an error is detected in step 2.42, a control signal is output to the first selection section 34.44 and the second selection section 35.45 to switch the received data.
通常時は、伝送路５ａを介して上流の成るデータ送受信
装置から入力したデータは第一データ送受信装置３の第
一選択部３４に入力されており、第一選択部３４は伝送
路５ａからのデータを第一受信部３１へ入力している。Normally, data input from the upstream data transmitting/receiving device via the transmission path 5a is input to the first selecting section 34 of the first data transmitting/receiving device 3, and the first selecting section 34 receives data from the data transmitting/receiving device located upstream via the transmission path 5a. Data is input to the first receiving section 31.
第一受信部３１では入力される受信データを受信して処
理部３７へ送り、処理部３７では第一受信部３１と自装
置データの処理を行った処理結果を送信部３３を介して
伝送路５ｂに送出している。またこのとき第二選択部３
５は、送信部３３から送出されるデータを第二受信部３
２に送り、送信部３３から送出されるデータの監視をし
ている。なお第二データ送受信装置４も第一送受信装置
３と同様の受信および送信動作を行っている。The first receiving section 31 receives input reception data and sends it to the processing section 37, and the processing section 37 processes the first receiving section 31 and its own data and sends the processing results to the transmission path via the transmission section 33. It is sent to 5b. Also at this time, the second selection section 3
5 transmits the data sent from the transmitter 33 to the second receiver 3.
2 and monitors the data sent from the transmitter 33. Note that the second data transmitting/receiving device 4 also performs the same receiving and transmitting operations as the first transmitting/receiving device 3.
上記した動作を行っているときに障害が発生した場合の
切り分けの一例は、第２図において下記のように接続変
更を行うことにより発生障害の切り分けと限定を行う。An example of how to isolate a failure when it occurs during the above operations is to isolate and limit the failure by changing the connection as shown in FIG. 2 below.
１、初期接続状態が下記のような時。1. When the initial connection status is as follows.
１−１． 第一データ送受信装置３において、第一受
信部３１と伝送路５ａを第一選択部３４を介して接続す
る。1-1. In the first data transmitting/receiving device 3, the first receiving section 31 and the transmission path 5a are connected via the first selecting section 34.
第二受信部３２と送信部３３とを第二選択部３５を介し
て接続する。The second receiving section 32 and the transmitting section 33 are connected via the second selecting section 35.
■−２．第二データ送受信装置４において、第一受信部
４１と送信部３３を伝送路５ｂを介して接続する。■-2. In the second data transmitting/receiving device 4, the first receiving section 41 and the transmitting section 33 are connected via the transmission path 5b.
第二受信部４２と送信部４３を第二選択部４５を介して
接続する。The second receiving section 42 and the transmitting section 43 are connected via the second selecting section 45.
２、障害■ 第一受信部４１でエラーが発生の場合２−
１． 対処方法データ送受信装置４の内部接続を、送信部４３は第一選
択部４４を介して第一受信部４１に接続変更し、また送
信部３３は伝送路５ｂを介して第二受信部４２に接続変
更する。2. Failure ■ If an error occurs in the first receiving section 41 2-
1. Countermeasures Change the internal connection of the data transmitting/receiving device 4 so that the transmitter 43 connects to the first receiver 41 via the first selector 44, and the transmitter 33 connects to the second receiver 42 via the transmission path 5b. Change the connection.
２−２．対処後の状態と障害個所の限定（ａｌ第一受信
部４１でエラー発生−・・−第一受信部４Ｉの故障（ｂ）第二受信部４２でエラー発生−−−−一・・伝送
路２ｂ線上３、障害■ 第二受信部３２でエラーが発生の場合２−
１．対処方法データ送受信装置３の内部接続を、送信部３３を第一選
択部３４を介して第一受信部３１に接続変更し、また伝
送路５ａを第一選択部３４を介して第二受信部３２に接
続変更する。2-2. Status after handling and limitation of failure location (Al Error occurred in first receiving section 41 - Failure of first receiving section 4I (b) Error occurred in second receiving section 42 - 1... Transmission path 3, failure on the 2b line ■ If an error occurs in the second receiving section 32 2-
1. Countermeasure Change the internal connection of the data transmitting/receiving device 3 by connecting the transmitting section 33 to the first receiving section 31 via the first selecting section 34, and connecting the transmission path 5a to the second receiving section via the first selecting section 34. Change the connection to 32.
２−２ 対処後の状態と障害個所の特定（ａ）第一受
信部３１でエラー発生−・−−−−一送信部３３の故障（ｂ）第二受信部３２でエラー発生・・・−・−第二受
信部３２の故障〔発明の効果〕以上の説明から明らかなように本発明によれば、伝送路
での障害の切り分けが可能となり、従って自動自己診断
等の容易化、及び障害復旧時間の短縮等の試験合理化が
行うことができ、伝送路の信頼性の向上に貢献できる。2-2 Identification of status and failure location after handling (a) Error occurred in first receiving section 31 --- Failure in one transmitting section 33 (b) Error occurred in second receiving section 32 --- - Failure of the second receiving unit 32 [Effects of the invention] As is clear from the above explanation, according to the present invention, it is possible to isolate faults in the transmission path, thus facilitating automatic self-diagnosis, etc., and preventing faults. Tests can be streamlined, such as by shortening recovery time, and can contribute to improving the reliability of transmission lines.
第１図は本発明の原理構成を示す回路図、第２図は本発
明による一実施例の回路構成を示す図、第３図は従来の一実施例の回路構成を示す図、図におい
て、１はデータ送受信装置、１１は第一受信部、１２は第二受信部、１３は送信部、１４は第一選択部、１５は第二選択部、１６は処理部、２ａは上流側の伝送路、２ｂは下流側の伝送路、を示す。上流のデータ送受信装置から下流のデータ送受信装置へ本発明の原理構成を示す図本発明の一実施例の回路構成を示す図FIG. 1 is a circuit diagram showing the principle configuration of the present invention, FIG. 2 is a diagram showing the circuit configuration of an embodiment according to the invention, and FIG. 3 is a diagram showing the circuit configuration of a conventional embodiment. 1 is a data transmitting and receiving device, 11 is a first receiving section, 12 is a second receiving section, 13 is a transmitting section, 14 is a first selection section, 15 is a second selection section, 16 is a processing section, 2a is an upstream transmission 2b indicates the downstream transmission line. A diagram showing the principle configuration of the present invention from an upstream data transmitting/receiving device to a downstream data transmitting/receiving device A diagram showing a circuit configuration of an embodiment of the present invention
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1227680AJP2737294B2 (en) | 1989-09-01 | 1989-09-01 | Duplex receiver |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1227680AJP2737294B2 (en) | 1989-09-01 | 1989-09-01 | Duplex receiver |
| Publication Number | Publication Date |
|---|---|
| JPH0389739Atrue JPH0389739A (en) | 1991-04-15 |
| JP2737294B2 JP2737294B2 (en) | 1998-04-08 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1227680AExpired - LifetimeJP2737294B2 (en) | 1989-09-01 | 1989-09-01 | Duplex receiver |
| Country | Link |
|---|---|
| JP (1) | JP2737294B2 (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008017263A (en)* | 2006-07-07 | 2008-01-24 | Oki Electric Ind Co Ltd | Communication network |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008017263A (en)* | 2006-07-07 | 2008-01-24 | Oki Electric Ind Co Ltd | Communication network |
| Publication number | Publication date |
|---|---|
| JP2737294B2 (en) | 1998-04-08 |
| Publication | Publication Date | Title |
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