JPS63228849A - Decentralized transmitting device - Google Patents
Decentralized transmitting deviceInfo
- Publication number
- JPS63228849A JPS63228849A JP62060896A JP6089687A JPS63228849A JP S63228849 A JPS63228849 A JP S63228849A JP 62060896 A JP62060896 A JP 62060896A JP 6089687 A JP6089687 A JP 6089687A JP S63228849 A JPS63228849 A JP S63228849A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- transmission
- transmission device
- returned
- response
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 58
- 238000012790 confirmation Methods 0.000 claims description 3
- 208000032368 Device malfunction Diseases 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Landscapes
- Small-Scale Networks (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、リング型のローカル・エリア・ネットワーク
や交換機ネットワーク等に利用する伝送装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a transmission device used in a ring-type local area network, exchange network, or the like.
（従来の技術）
従来、リングネットワークを構成するこの種の伝送装置
は、リングを介したトークンパッシング手順を利用した
パケット交換機能と、伝送路にキャリア信号を下流の伝
送装置に伝える機能と、上流の伝送装置からのキャリア
信号を検出できる機能を備えており、上流の伝送信号か
らのキャリア信号断を検出することにより重大なリング
障害を検出することができるように構成されていた。(Prior Art) Conventionally, this type of transmission equipment constituting a ring network has a packet switching function using a token passing procedure via the ring, a function of transmitting a carrier signal to a downstream transmission equipment on a transmission path, and a function of transmitting a carrier signal to a downstream transmission equipment through a transmission path. It was equipped with a function to detect the carrier signal from the upstream transmission device, and was configured to be able to detect a serious ring failure by detecting a loss of the carrier signal from the upstream transmission signal.
第２図は従来の分散型伝送装置の構成を示している。同
図において、２１は伝送装置であり、二重化された互い
に逆向きの伝送路２２によってリング状に接続されてい
る。FIG. 2 shows the configuration of a conventional distributed transmission device. In the figure, reference numeral 21 denotes a transmission device, which is connected in a ring shape by duplex transmission paths 22 that are directed in opposite directions.
伝送装置２１はパケット交換部２３．キャリア出力部２
４．キャリア検出部２５によって構成されている。The transmission device 21 includes a packet switching section 23. Carrier output section 2
4. It is composed of a carrier detection section 25.
次に上記従来の動作について説明する。伝送装置２１−
１と２１−４の間の伝送路２２が両方とも切断されたと
すると伝送袋５１２１−１は１系のキャリア信号断を検
出する。伝送袋［２１−４は２系のキャリア信号断を検
出している。各伝送装置２１は自分が障害を検出したの
と異なる系でパケット交換を正常に行なうことができる
と判断した場合には正常なリングだけを利用すればよい
。しかし、障害未検出のリングでも正常なパケット交換
ができないので。Next, the above conventional operation will be explained. Transmission device 21-
If both transmission paths 22 between 1 and 21-4 are disconnected, the transmission bag 5121-1 detects the disconnection of the carrier signal of the 1 system. The transmission bag [21-4] detects a carrier signal disconnection in the 2nd system. If each transmission device 21 determines that it can normally perform packet exchange in a system different from the one in which it detected the failure, it is sufficient to use only the normal ring. However, normal packet exchange is not possible even on a ring with no fault detected.
伝送装置２１−１と２１−４は自分の折り返すべきポイ
ントと判断し、リングの復旧を図る。The transmission devices 21-1 and 21-4 determine that this is the point at which they should return, and attempt to restore the ring.
上記従来の分散型伝送装置でも、上流からのキャリア検
出とリングを介してパケット交換動作の確認を行なうこ
とにより、重大なリング障害が発生した場合にもリング
運用の復旧を行なうことができた。Even in the conventional distributed transmission device described above, by detecting carriers from upstream and checking packet switching operations via the ring, it was possible to restore ring operation even when a serious ring failure occurred.
（発明が解決しようとする問題点）
上記従来の分散型伝送装置では、上流からのキャリア信
号異常検出により折り返しポイントを決定しているため
、伝送路自体が切断してしまったときと伝送装置の電源
が切断され、その前後の伝送装置間で通信ができないと
きには、障害復旧が可能となるが、伝送装置内部の障害
による通信異常の場合にはキャリア信号異常を検出でき
ず、リング障害を復旧することができない欠点があった
。(Problems to be Solved by the Invention) In the conventional distributed transmission device described above, the loopback point is determined by detecting an abnormality in the carrier signal from upstream. If the power is cut and communication is not possible between the transmission devices before and after the power is cut off, it is possible to recover from the failure, but if the communication abnormality is due to a failure inside the transmission device, the carrier signal abnormality cannot be detected and the ring failure cannot be recovered. There was a drawback that it could not be done.
本発明の目的は、従来の欠点を解消し、全ての伝送装置
が独自にリング状態を監視することによってリング障害
発生時にも運用を復旧できる優れた分散型伝送装置を提
供することである。SUMMARY OF THE INVENTION An object of the present invention is to provide an excellent distributed transmission device that eliminates the drawbacks of the prior art and allows all transmission devices to independently monitor the ring status to restore operation even when a ring failure occurs.
（問題点を解決するための手段）
本発明の分散型伝送装置は、二重化されているリングネ
ットワークにおいて、伝送路に障害が発生したり、装置
が故障してリングの運用が異常となった場合にも各伝送
装置が隣接する伝送装置との間で確認コマンドの受送信
ができるかを独自に判断することにより重大なリング障
害からの復旧ができるようにしたものである。(Means for Solving the Problems) The distributed transmission device of the present invention can be used in a duplex ring network when a failure occurs in the transmission path or the device malfunctions and the ring operation becomes abnormal. In this system, each transmission device independently determines whether it can send and receive confirmation commands to and from adjacent transmission devices, thereby making it possible to recover from a serious ring failure.
（作 用）
本発明によれば、リング障害発生時に隣接伝送装置との
間で確認フレームの受送信を行なうことによって、リン
グ障害個所を検出し、運用の復旧を速かに図ることがで
きる。(Function) According to the present invention, by transmitting and receiving confirmation frames with adjacent transmission devices when a ring fault occurs, it is possible to detect the ring fault and quickly restore operation.
（実施例） 本発明の一実施例を第１図に基づいて説明する。(Example) An embodiment of the present invention will be described based on FIG.
第１図は本発明の分散型伝送装置の概略構成図である。FIG. 1 is a schematic configuration diagram of a distributed transmission device of the present invention.
同図において、１（１−１，１−２，１−３゜１−４）
は伝送装置であり、二重化された互いに逆向きの伝送路
２によってリング状に接続されている。In the same figure, 1 (1-1, 1-2, 1-3° 1-4)
is a transmission device, which is connected in a ring shape by duplex transmission paths 2 that are directed in opposite directions.
次に上記実施例の動作について説明する。伝送路の両系
でパケット送信権が紛失するなど、ある一定時間パケッ
ト交換動作が復旧しない場合には重大なリング障害が発
生したと判定し、各伝送装置１は独自に障害復旧モード
として動作する。このモードでは全伝送装置とも両系に
全伝送装置で受信可能なグローバル・アドレスを設定し
た通知フレームを送出する。通知フレームを受信した各
伝送装置１は受信した１系とは逆の２系を利用して発信
元に応答を返す。このときは、各伝送装置１は送受権に
かかわらずフレームを送出できるようになっている。こ
のモードでのチェック中に、（１）両系から応答が戻っ
てきた場合には自伝送装置の周辺では障害が発生してい
ないと判断する。Next, the operation of the above embodiment will be explained. If the packet switching operation is not restored for a certain period of time, such as when packet transmission rights are lost on both sides of the transmission path, it is determined that a serious ring failure has occurred, and each transmission device 1 independently operates in a failure recovery mode. . In this mode, all transmission devices send a notification frame to both systems with a global address that can be received by all transmission devices. Each transmission device 1 that has received the notification frame returns a response to the sender using the second system, which is the opposite of the first system that received the notification frame. At this time, each transmission device 1 is able to transmit frames regardless of the transmission/reception rights. During the check in this mode, (1) if responses are returned from both systems, it is determined that no failure has occurred around the own transmission device.
（２）１系からだけ応答が返り、２系からは応答が返ら
ない場合には、自伝送装置は１系入力を２系出力に折り
返す。(2) If a response is returned only from the 1st system and no response is returned from the 2nd system, the own transmission device loops the 1st system input to the 2nd system output.
（３）２系からだけ応答が返り、１系からは応答が返ら
ない場合には、自伝送装置は２系入力を１系出力に折り
返す。(3) If a response is returned only from the 2nd system and no response is returned from the 1st system, the own transmission device returns the 2nd system input to the 1st system output.
（４）両系とも応答が返らない場合には、この伝送装置
はリングからはずれたと判断する。(4) If no response is returned from either system, it is determined that this transmission device has left the ring.
このように、上記実施例によれば、各伝送装置１が独自
に自伝送装置周辺のリング状態をパケットの受送信手順
により検出しているので確実に運用の復旧ができる。ま
た、障害検出、チェックが本来の動作であるパケット交
換により行なうので、キャリア検出方法などに比較して
処理の確実性が高い（誤動作が少ない）。さらに伝送装
置内のパケット交換制御部に障害が発生した場合も同様
の処理で運用の復旧ができる。In this way, according to the embodiment described above, each transmission device 1 independently detects the ring state around itself by using the packet reception/transmission procedure, so that operations can be reliably restored. Furthermore, since fault detection and checking are performed by packet switching, which is the original operation, processing reliability is higher (less malfunctions occur) than in carrier detection methods. Furthermore, even if a failure occurs in the packet switching control section within the transmission device, operations can be restored using similar processing.
（発明の効果）
本発明によれば、各伝送装置が独自の検出で動作できる
ので、全体のコントロールを行なう特別な装置がなくと
も、リング障害を復旧することができ、またキャリア信
号送出、検出部などが不要であり、その部分の障害によ
り誤ったリング制御が発生することがなく、実用上の効
果は大である。(Effects of the Invention) According to the present invention, since each transmission device can operate with its own detection, it is possible to recover from a ring failure without the need for a special device that controls the entire system, and carrier signal transmission and detection Since there is no need for a section, erroneous ring control will not occur due to a failure in that section, and the practical effect is great.
第１図は本発明の一実施例における分散型伝送装置の概
略構成図、第２図は従来の分散型伝送装置の概略構成図
である。
１（１−１，１−２，１−３，１−４）・・・伝送装置
、 ２・・・伝送路。FIG. 1 is a schematic diagram of a distributed transmission device according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of a conventional distributed transmission device. 1 (1-1, 1-2, 1-3, 1-4)...transmission device, 2...transmission line.
Claims (1)
に障害が発生したり、装置が故障してリングの運用が異
常となった場合にも各伝送装置が隣接する伝送装置との
間で確認コマンドの受送信ができるかを独自に判断する
ことにより重大なリング障害からの復旧ができるように
したことを特徴とする分散型伝送装置。In a duplex ring network, each transmission device can send and receive confirmation commands between adjacent transmission devices even if a failure occurs in the transmission path or if a device malfunctions and the ring operation becomes abnormal. 1. A distributed transmission device characterized by being able to recover from a serious ring failure by independently determining whether or not a ring failure is possible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62060896A JPS63228849A (en) | 1987-03-18 | 1987-03-18 | Decentralized transmitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62060896A JPS63228849A (en) | 1987-03-18 | 1987-03-18 | Decentralized transmitting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63228849A true JPS63228849A (en) | 1988-09-22 |
Family
ID=13155577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62060896A Pending JPS63228849A (en) | 1987-03-18 | 1987-03-18 | Decentralized transmitting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63228849A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02294133A (en) * | 1989-05-08 | 1990-12-05 | Nippon Telegr & Teleph Corp <Ntt> | Automatic loop network fault recovery system |
| US5920543A (en) * | 1996-06-21 | 1999-07-06 | Nec Corporation | Double ring-type local area network system capable of switching transmission paths without interruption |
-
1987
- 1987-03-18 JP JP62060896A patent/JPS63228849A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02294133A (en) * | 1989-05-08 | 1990-12-05 | Nippon Telegr & Teleph Corp <Ntt> | Automatic loop network fault recovery system |
| US5920543A (en) * | 1996-06-21 | 1999-07-06 | Nec Corporation | Double ring-type local area network system capable of switching transmission paths without interruption |
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