JPH06303656A - Optical switch network - Google Patents
Optical switch networkInfo
- Publication number
- JPH06303656A JPH06303656A JP5089015A JP8901593A JPH06303656A JP H06303656 A JPH06303656 A JP H06303656A JP 5089015 A JP5089015 A JP 5089015A JP 8901593 A JP8901593 A JP 8901593A JP H06303656 A JPH06303656 A JP H06303656A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- optical switch
- matrix
- output
- input
- 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.)
- Granted
Links
Landscapes
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Optical Communication System (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、光ネットワークに用い
られる光スイッチ回路網に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical switch network used in an optical network.
【０００２】[0002]
【従来の技術】光伝送路に障害が発生した場合に、光の
まま切り換えて、障害回復を行う時分割多重と空間分割
多重を組み合わせた光ネットワークについては、図３に
示すようなネットワーク・ノード構成がある。各ノード
は、電気ＤＣＳ（デジタル・クロスコネクト・システ
ム）２０１、ＯＬＴＭ（オプティカル・ライン・ターミ
ネータ・アンド・マルチプレクサ）２０２、２１２、光
スイッチ回路網２０３、２０４、２０５により構成され
ており、ノード間は現用光伝送路２０６、２０８及び予
備光伝送路２０７、２０９により接続されている。2. Description of the Related Art An optical network in which time division multiplexing and space division multiplexing are combined to perform a failure recovery by switching the optical switching in the case of a failure in an optical transmission line is shown in FIG. There is a configuration. Each node is composed of an electric DCS (Digital Cross Connect System) 201, OLTM (Optical Line Terminator and Multiplexer) 202, 212, and optical switch networks 203, 204, 205, and between the nodes. They are connected by working optical transmission lines 206 and 208 and standby optical transmission lines 207 and 209.
【０００３】光スイッチ回路網２０３は方路単位での接
続性を保証すればよいので完全群である必要はなく、図
４に示すようにノード間予備光伝送路が３で均一であれ
ばｎ×ｎマトリクス・スイッチ（ｎは対向ノード数）を
３個並列に配置した構成でよい。しかし、実際の網では
ノード間トラフィックの不均一性によって、予備光伝送
路数も不均一となるが、図５に示すように、予備光伝送
路の少ないノードからの光信号は光分岐、光合流器によ
って入出力の光伝送路の数を合わせることにより、複数
のマトリクス 光スイッチに接続可能な構成にする（鈴
木らによる電子情報通信学会技術報告 ＳＳＥ９０−９
８）。The optical switch network 203 does not need to be a complete group because it is only necessary to guarantee the connectivity in units of routes, and as shown in FIG. A configuration may be adopted in which three × n matrix switches (n is the number of opposite nodes) are arranged in parallel. However, in an actual network, the number of backup optical transmission lines is also non-uniform due to the non-uniformity of traffic between nodes, but as shown in FIG. By combining the number of input and output optical transmission lines with a confluencer, it is possible to connect to multiple matrix optical switches (Suzuki et al. Technical Report SSE90-9
8).
【０００４】[0004]
【発明が解決しようとする課題】以上説明した従来技術
による光スイッチ回路網を用いれば、光伝送路の不均一
性に対応できる。By using the optical switch circuit network according to the prior art described above, it is possible to deal with the nonuniformity of the optical transmission line.
【０００５】しかしながら、光分岐器、光合流器を挿入
する伝送路と挿入しない伝送路とで、光分岐器、光合流
器の損失による、光レベルの不均一性を避けるために、
各々の入出力光伝送路に対し光分岐器、光合流器を挿入
する必要が生じ、光分岐器、光合流器の実装空間が無駄
であると同時に、不必要な入出力ファイバが発生して、
それらの実装空間も無駄になり、非効率である。However, in order to avoid the non-uniformity of the optical level due to the loss of the optical branching device and the optical converging device, the transmission line in which the optical branching device and the optical combining device are inserted and the transmission line which is not inserted are
Since it is necessary to insert an optical branching device and an optical merging device into each input / output optical transmission line, the mounting space for the optical diverging device and the optical merging device is wasted, and unnecessary input / output fibers are generated. ,
Their mounting space is wasted and inefficient.
【０００６】本発明の目的は、光伝送路の不均一性に対
応すると同時に、光レベルの不均一性のないかつ効率的
実装の可能な光スイッチ回路網を提供することにある。An object of the present invention is to provide an optical switch network which can cope with the nonuniformity of an optical transmission line and at the same time can be mounted efficiently without the nonuniformity of the optical level.
【０００７】[0007]
【課題を解決するための手段】本発明は、ｎ個の異なる
方路から入出力される互いに異なる本数の光伝送路間の
接続切り換えを行う光スイッチ回路網であって、それぞ
れ同一方路からの光信号が入力されるｎ個のｍ入力ｎ出
力の光スイッチからなる一次光スイッチ群と、前記一次
光スイッチ群のｎ個の光スイッチの各々の一つずつの出
力を入力とするｍ個のｎ入力ｎ出力の光スイッチからな
る二次光スイッチ群と、前記二次光スイッチ群のｍ個の
光スイッチの各々の１つずつの出力を入力とし、それぞ
れ同一方路へ光信号を出力するｎ個のｎ入力ｍ出力の光
スイッチからなる三次光スイッチ群とからなる三段構成
の光スイッチ回路網を複数持つ構成からなり、前記複数
の光スイッチ回路網のそれぞれに各方路の入出力光伝送
路が少なくとも一つは接続されていることを特徴とす
る。SUMMARY OF THE INVENTION The present invention is an optical switch network for switching connections between a different number of optical transmission lines input and output from n different routes, each of which is connected to the same route. Primary optical switch group consisting of n m-input and n-output optical switches to which the optical signals of (1) and (2) described above are input, and the output of each of the n optical switches of the primary optical switch group is m. , A secondary optical switch group consisting of n-input and n-output optical switches, and one output of each of the m optical switches of the secondary optical switch group are input, and optical signals are output to the same route. A plurality of three-stage optical switch networks consisting of a n-input m-output optical switch group and a three-stage optical switch network, each of which has a plurality of three-stage optical switch networks. At least one output optical transmission line Wherein the are connected.
【０００８】[0008]
【作用】本発明では、従来例のように、光伝送路毎に光
分岐器、光合流器が接続されているのではなく、光伝送
路が束ねられた各方路毎にマトリクス光スイッチが接続
されているので、光分岐器、光合流器の挿入による不必
要な入出力端が無くなり、効率良く実装できる。In the present invention, unlike the conventional example, the optical branching device and the optical merging device are not connected to each optical transmission line, but a matrix optical switch is provided for each route in which the optical transmission lines are bundled. Since they are connected, unnecessary input / output terminals due to the insertion of the optical branching device and the optical merging device are eliminated, and the mounting can be performed efficiently.
【０００９】[0009]
【実施例】以下、実施例を示して本発明を詳しく説明す
る。EXAMPLES The present invention will be described in detail below with reference to examples.
【００１０】図２は、方路数４、各方路から来る光伝送
路の内の最大数が３である場合に、本発明を適用した光
スイッチ回路網の一実施例を示すものである。マトリク
ス光スイッチ１０２の列の両側に光分岐器、光合流器を
配置せずに、入力側にはマトリクス光スイッチ１０１の
列を３列、出力側にはマトリクス光スイッチ１０３の列
を３列配置することにより構成される。マトリクス光ス
イッチ１０２は、光伝送路が接続される方路数と同数の
次数（この場合４次）のマトリクス光スイッチであり、
第２段にノード間の光伝送路の最大数と同数だけ配置す
る。各方路から来る光伝送路の内の最大数が３である場
合を考えているので、マトリクス光スイッチ１０１の列
には、他ノードからの３本以内の光伝送路が入力され、
マトリクス光スイッチ１０３の列には、他ノードへ３本
以内の光伝送路が出力される。マトリクス光スイッチ１
０１は各方路から来る伝送路の内の最大数と同数の出力
数を持つマトリクス光スイッチであり、第1 段に方路数
と同数だけ配置する。マトリクス光スイッチ１０３は各
方路から来る伝送路の内の最大数と同数の入力数を持つ
マトリクス光スイッチであり、第３段に方路数と同数だ
け配置する。FIG. 2 shows an embodiment of an optical switch network to which the present invention is applied when the number of routes is 4 and the maximum number of optical transmission lines coming from each route is 3. . Without arranging optical branching devices and optical combiners on both sides of the matrix optical switch 102, three rows of the matrix optical switch 101 are arranged on the input side and three rows of the matrix optical switch 103 are arranged on the output side. It is configured by The matrix optical switch 102 is a matrix optical switch having the same number of orders (fourth order in this case) as the number of routes to which the optical transmission lines are connected,
The same number as the maximum number of optical transmission lines between nodes is arranged in the second stage. Since it is considered that the maximum number of the optical transmission lines coming from each route is 3, the column of the matrix optical switch 101 is input with three or less optical transmission lines from other nodes,
On the column of the matrix optical switch 103, up to three optical transmission lines are output to other nodes. Matrix optical switch 1
Reference numeral 01 denotes a matrix optical switch having the same number of outputs as the maximum number of transmission lines coming from each route, and the same number as the number of routes is arranged in the first stage. The matrix optical switch 103 is a matrix optical switch having the same number of inputs as the maximum number of the transmission paths coming from each path, and the matrix optical switches 103 are arranged in the same number as the number of paths in the third stage.
【００１１】第１段のマトリクス光スイッチ１０１の出
力は第２段のマトリクス光スイッチの入力と接続される
が、図２に示されるように、第１段の各マトリクス光ス
イッチ１０１の出力を、それぞれ異なる第２段のマトリ
クス光スイッチ１０２に接続し、第２段の各マトリクス
光スイッチ１０２の入力を、それぞれ異なる方路の第１
段のマトリクス光スイッチ１０１と接続する。第２段の
マトリクス光スイッチ１０２の出力は第３段のマトリク
ス光スイッチ１０３の入力と接続されるが、図２に示さ
れるように、第２段のマトリクス光スイッチ１０２の出
力を、それぞれ異なる方路の第３段のマトリクス光スイ
ッチ１０３に接続し、第３段のマトリクス光スイッチの
入力は、それぞれ異なる第２段のマトリクス光スイッチ
１０２と接続する。The output of the matrix optical switch 101 of the first stage is connected to the input of the matrix optical switch of the second stage. As shown in FIG. 2, the output of each matrix optical switch 101 of the first stage is The matrix optical switches 102 of different second stages are connected to each other, and the inputs of the matrix optical switches 102 of the second stage are connected to the first of different routes.
It is connected to the matrix optical switch 101 of the stage. The output of the matrix optical switch 102 of the second stage is connected to the input of the matrix optical switch 103 of the third stage, but as shown in FIG. 2, the output of the matrix optical switch 102 of the second stage is different from each other. To the third stage matrix optical switch 103, and the inputs of the third stage matrix optical switch are connected to different second stage matrix optical switches 102, respectively.
【００１２】このように、第２段のマトリクス光スイッ
チ１０２の前後に、光分岐器、光合流器を挿入せずに、
第１段のマトリクス光スイッチ１０１と第３段のマトリ
クス光スイッチ１０３を挿入することにより、従来の光
スイッチ回路網と同じ接続性を保ったまま、光分岐器、
光合流器を無くすことができ、効率的な実装を行うこと
ができる。Thus, without inserting an optical branching device or an optical merging device before and after the second-stage matrix optical switch 102,
By inserting the matrix optical switch 101 of the first stage and the matrix optical switch 103 of the third stage, the optical branching device while maintaining the same connectivity as the conventional optical switch network,
The optical combiner can be eliminated, and efficient mounting can be performed.
【００１３】又、使用するマトリクス光スイッチのサイ
ズが決定されている場合に、本発明による光スイッチ回
路網の入出力光伝送路数を、マトリクス光スイッチ１０
１の入力光伝送路数、マトリクス光スイッチ１０３の出
力光伝送路数以上に増加させたい場合には、図１に示さ
れるように、図２に示される光スイッチ回路網を複数並
列に並べ、各方路からの光伝送路をそれぞれの光スイッ
チ回路網に少なくとも１つは接続されるように分配して
接続することにより、対処可能である。In addition, when the size of the matrix optical switch to be used is determined, the number of input / output optical transmission lines of the optical switch network according to the present invention is set to the matrix optical switch 10.
When it is desired to increase the number of input optical transmission lines of 1 and the number of output optical transmission lines of the matrix optical switch 103, as shown in FIG. 1, a plurality of optical switch networks shown in FIG. 2 are arranged in parallel, This can be dealt with by distributing and connecting at least one optical transmission line from each route to each optical switch network.
【００１４】以上、実施例をもって本発明を詳細に説明
したが、本発明はこの実施例のみに限定されるものでは
ない。たとえば、実施例は、接続される光伝送路の方路
数が４、各方路から来る光伝送路数の最大数が３である
場合について説明したが、これらが他の値の場合にも本
発明が適用できる。Although the present invention has been described in detail with reference to the embodiment, the present invention is not limited to this embodiment. For example, in the embodiment, the case where the number of optical transmission lines to be connected is 4 and the maximum number of optical transmission lines coming from each route is 3 has been described. The present invention can be applied.
【００１５】[0015]
【発明の効果】以上、説明した様に、本発明によれば、
ノード間トラフィックの不均一性を補償するために用い
ていた光分岐器、光合流器を用いずに光スイッチ回路網
を構成することができ、不必要な光分岐器、光合流器の
入出力端を無くすことができる。従って、効率的な実装
を行うことができる。As described above, according to the present invention,
The optical switch network can be configured without using the optical branching device and the optical merging device used to compensate for the non-uniformity of the traffic between nodes, and unnecessary input / output of the optical diverging device and the optical merging device You can eliminate the edge. Therefore, efficient implementation can be performed.
【図１】本発明の一実施例を説明するための図である。FIG. 1 is a diagram for explaining an embodiment of the present invention.
【図２】本発明の一実施例を説明するための図である。FIG. 2 is a diagram for explaining an example of the present invention.
【図３】従来例を説明するための図である。FIG. 3 is a diagram for explaining a conventional example.
【図４】従来例を説明するための図である。FIG. 4 is a diagram for explaining a conventional example.
【図５】従来例を説明するための図である。FIG. 5 is a diagram for explaining a conventional example.
１０１ マトリクス 光スイッチ １０２ マトリクス 光スイッチ １０３ マトリクス光スイッチ ２０１ 電気ＤＣＳ（デジタル・クロスコネクト・シス
テム） ２０２ ＯＬＴＭ（オプティカル・ライン・ターミネー
タ・アンド・マルチプレクサ） ２０３ 光スイッチ回路網 ２０４ 光スイッチ回路網 ２０５ 光スイッチ回路網 ２０６ 現用光伝送路 ２０７ 予備光伝送路 ２０８ 現用光伝送路 ２０９ 予備光伝送路 ２１２ ＯＬＴＭ（オプティカル・ライン・ターミネー
タ・アンド・マルチプレクサ101 Matrix Optical Switch 102 Matrix Optical Switch 103 Matrix Optical Switch 201 Electric DCS (Digital Cross-Connect System) 202 OLTM (Optical Line Terminator and Multiplexer) 203 Optical Switch Circuit Network 204 Optical Switch Circuit Network 205 Optical Switch Circuit Network 206 Working optical transmission line 207 Standby optical transmission line 208 Working optical transmission line 209 Standby optical transmission line 212 OLTM (optical line terminator and multiplexer)
Claims (1)
に異なる本数の光伝送路間の接続切り換えを行う光スイ
ッチ回路網であって、それぞれ同一方路からの光信号が
入力されるｎ個のｍ入力ｎ出力の光スイッチからなる一
次光スイッチ群と、前記一次光スイッチ群のｎ個の光ス
イッチの各々の一つずつの出力を入力とするｍ個のｎ入
力ｎ出力の光スイッチからなる二次光スイッチ群と、前
記二次光スイッチ群のｍ個の光スイッチの各々の１つず
つの出力を入力とし、それぞれ同一方路へ光信号を出力
するｎ個のｎ入力ｍ出力の光スイッチからなる三次光ス
イッチ群とからなる三段構成の光スイッチ回路網を複数
持つ構成からなり、前記複数の光スイッチ回路網のそれ
ぞれに各方路の入出力光伝送路が少なくとも一つは接続
されていることを特徴とする光スイッチ回路網。1. An optical switch circuit network for switching connection between a different number of optical transmission lines that are input and output from n different routes, each of which receives optical signals from the same route. Primary optical switch group consisting of m optical switches with n inputs and n outputs, and m optical switches with n inputs and n outputs each receiving an output of each of the n optical switches of the primary optical switch group. And an n-input m-output for outputting an optical signal to the same route, using as inputs the output of each of the secondary optical switch group consisting of The optical switch circuit network having a three-stage configuration including a tertiary optical switch group composed of the optical switches of (3), and each of the plurality of optical switch circuit networks has at least one input / output optical transmission line. Is connected Optical switch circuit network to collect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5089015A JP2871996B2 (en) | 1993-04-16 | 1993-04-16 | Optical switch network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5089015A JP2871996B2 (en) | 1993-04-16 | 1993-04-16 | Optical switch network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06303656A true JPH06303656A (en) | 1994-10-28 |
| JP2871996B2 JP2871996B2 (en) | 1999-03-17 |
Family
ID=13959089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5089015A Expired - Fee Related JP2871996B2 (en) | 1993-04-16 | 1993-04-16 | Optical switch network |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2871996B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6115517A (en) * | 1997-07-07 | 2000-09-05 | Nec Corporation | Optical communication network apparatus and optical switching network |
| SG97939A1 (en) * | 1999-09-30 | 2003-08-20 | Cit Alcatel | Control architecture in optical burst-switched networks |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62125795A (en) * | 1985-11-26 | 1987-06-08 | Fujitsu Ltd | Optical switching device |
| JPS62283794A (en) * | 1986-05-30 | 1987-12-09 | Nec Corp | Matrix switching system for communication system |
| JPS63127692A (en) * | 1986-10-15 | 1988-05-31 | プレツシー オーバーシーズ リミテツド | Arrangement for connecting multistep switching matrix |
-
1993
- 1993-04-16 JP JP5089015A patent/JP2871996B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62125795A (en) * | 1985-11-26 | 1987-06-08 | Fujitsu Ltd | Optical switching device |
| JPS62283794A (en) * | 1986-05-30 | 1987-12-09 | Nec Corp | Matrix switching system for communication system |
| JPS63127692A (en) * | 1986-10-15 | 1988-05-31 | プレツシー オーバーシーズ リミテツド | Arrangement for connecting multistep switching matrix |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6115517A (en) * | 1997-07-07 | 2000-09-05 | Nec Corporation | Optical communication network apparatus and optical switching network |
| SG97939A1 (en) * | 1999-09-30 | 2003-08-20 | Cit Alcatel | Control architecture in optical burst-switched networks |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2871996B2 (en) | 1999-03-17 |
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