JP2005286736A - Wavelength switching control method, variable wavelength transmission apparatus, and variable wavelength transmission system - Google Patents

Wavelength switching control method, variable wavelength transmission apparatus, and variable wavelength transmission system Download PDF

Info

Publication number
JP2005286736A
JP2005286736A JP2004098717A JP2004098717A JP2005286736A JP 2005286736 A JP2005286736 A JP 2005286736A JP 2004098717 A JP2004098717 A JP 2004098717A JP 2004098717 A JP2004098717 A JP 2004098717A JP 2005286736 A JP2005286736 A JP 2005286736A
Authority
JP
Japan
Prior art keywords
wavelength
switching
transmission
wavelengths
variable
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
JP2004098717A
Other languages
Japanese (ja)
Inventor
Ken Tsumato
憲 妻藤
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2004098717A priority Critical patent/JP2005286736A/en
Publication of JP2005286736A publication Critical patent/JP2005286736A/en
Pending legal-status Critical Current

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wavelength switching control method, a variable wavelength transmission apparatus, and a variable wavelength transmission system capable of executing wavelength switching in timing when the wavelength switching is required. <P>SOLUTION: A WDM transmission apparatus 21 for multiplexing two wavelengths or more selected among a plurality of wavelengths and executing optical transmission includes: a wavelength information storage section 8 for storing in advance wavelengths different from the selected wavelengths and from the other wavelength multiplexed by each of the selected wavelengths as switching object wavelengths; a fault detection section 6 for detecting a fault in a transmission environment by each of the selected wavelengths; and a wavelength switching control section 7 for carrying out the control of switching the selected wavelengths into the switching object wavelengths when the transmission environment condition with respect to the selected wavelengths is adapted to a prescribed condition. By this configuration, a time required for switching can be reduced and the switching can immediately be executed in the timing when the wavelength switching is required. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、光伝送の障害発生時などに伝送波長を切り替える制御を行う波長切替制御方法、およびこの制御によって切り替えられた伝送波長で光伝送を行う可変波長伝送装置、可変波長伝送システムに関する。   The present invention relates to a wavelength switching control method for performing control for switching a transmission wavelength when an optical transmission failure occurs, a variable wavelength transmission apparatus for performing optical transmission at a transmission wavelength switched by this control, and a variable wavelength transmission system.

従来の波長切替制御は、複数の波長を選択的に出力可能な可変波長光源の波長を、トラフィック量に応じて切り替え制御するものである(例えば、特許文献1参照)。   Conventional wavelength switching control switches and controls the wavelength of a variable wavelength light source that can selectively output a plurality of wavelengths in accordance with the amount of traffic (for example, see Patent Document 1).

特開2002−344425号公報(段落0016〜0019、図2)JP 2002-344425 A (paragraphs 0016 to 0019, FIG. 2) 特開2003−143082号公報JP 2003-143082 A 特開平10−322287号公報Japanese Patent Laid-Open No. 10-322287

しかしながら、従来の波長切替制御では、トラフィック量に応じて波長を切り替えるので、波長切替を実行する前に、トラフィック量を検出し、検出したトラフィック量から切替後の波長を決定する必要があり、トラフィック量の検出または波長の決定に長時間を要する場合には、波長を切り替えるべきタイミングで切り替えることができないという問題があった。特に、特定波長の通信パスにおける伝送障害の発生により、緊急に他の波長に切り替える必要がある場合に、サービス停止の時間が長くなり、通信パスの再確立が遅れてしまうという問題があった。   However, in the conventional wavelength switching control, since the wavelength is switched according to the traffic volume, it is necessary to detect the traffic volume before executing the wavelength switching, and to determine the wavelength after switching from the detected traffic volume. When it takes a long time to detect the amount or determine the wavelength, there is a problem that the wavelength cannot be switched at the timing to be switched. In particular, due to the occurrence of a transmission failure in a communication path of a specific wavelength, there is a problem that the service stop time becomes long and the reestablishment of the communication path is delayed when it is necessary to switch to another wavelength urgently.

本発明の目的は、波長切替を要するタイミングで切替を実行できる波長切替制御方法、可変波長伝送装置および可変波長伝送システムを提供することである。   An object of the present invention is to provide a wavelength switching control method, a variable wavelength transmission apparatus, and a variable wavelength transmission system that can perform switching at a timing that requires wavelength switching.

本発明の波長切替制御方法は、複数の波長から選択された2以上の波長を多重化して光伝送を行い、伝送環境条件に応じて前記選択された波長を別の波長に切り替える制御を行うものであって、前記選択された波長毎に、その選択された波長と異なり、かつ多重化される他の波長とも異なる波長を切替候補波長として予め決定しておき、前記選択された波長に関する伝送環境条件が所定条件に適合したときに、前記選択された波長を切替候補波長に切り替える制御を行うことを特徴とするものである。   The wavelength switching control method of the present invention performs control of multiplexing two or more wavelengths selected from a plurality of wavelengths to perform optical transmission, and switching the selected wavelength to another wavelength according to transmission environment conditions. A wavelength different from the selected wavelength and different from other wavelengths to be multiplexed is determined in advance as a switching candidate wavelength for each of the selected wavelengths, and a transmission environment related to the selected wavelength. When the condition meets a predetermined condition, control is performed to switch the selected wavelength to a switching candidate wavelength.

本発明の波長切替制御によれば、切替後の波長となる切替候補波長を予め決定しておくので、切替に要する時間を短縮することができ、波長切替を要するタイミングで即座に切替を実行することができる。また、選択波長と異なると共に多重化される他の波長とも異なる波長を切替候補波長として決定するので、多重化される他の波長と重なってしまう事態も未然に回避することができる。   According to the wavelength switching control of the present invention, since the switching candidate wavelength to be the wavelength after switching is determined in advance, the time required for switching can be shortened, and switching is performed immediately at the timing when wavelength switching is required. be able to. Further, since a wavelength that is different from the selected wavelength and different from other multiplexed wavelengths is determined as the switching candidate wavelength, it is possible to avoid a situation in which the wavelength overlaps with other multiplexed wavelengths.

実施の形態1.
図1は、本発明の実施の形態1に係る可変波長伝送システムのネットワーク構成図である。可変波長伝送システムは、WDM(Wavelength Division Multiplexing)伝送装置21〜24と監視制御端末30とをLAN(Local Area Network)等のネットワークで接続して構成されたシステムである。WDM伝送装置21〜24は、相互にリング状に接続され、異なる複数の波長の光信号を多重化する伝送装置である。また、WDM伝送装置21〜24の各々は、たとえばSDH(Synchronuos Digital Hierarchy)伝送装置20に接続される。SDH伝送装置20は、光ファイバーを用いて高速デジタル通信を行う伝送装置である。監視制御端末30は、WDM伝送装置21〜24を遠隔から集中的に監視制御を行う端末である。なお、WDM伝送装置の数は4個に限らない。
Embodiment 1 FIG.
FIG. 1 is a network configuration diagram of a variable wavelength transmission system according to Embodiment 1 of the present invention. The variable wavelength transmission system is a system configured by connecting WDM (Wavelength Division Multiplexing) transmission apparatuses 21 to 24 and a monitoring control terminal 30 via a network such as a LAN (Local Area Network). The WDM transmission apparatuses 21 to 24 are transmission apparatuses that are connected to each other in a ring shape and multiplex optical signals having different wavelengths. Each of the WDM transmission apparatuses 21 to 24 is connected to an SDH (Synchronuos Digital Hierarchy) transmission apparatus 20, for example. The SDH transmission device 20 is a transmission device that performs high-speed digital communication using an optical fiber. The supervisory control terminal 30 is a terminal that centrally monitors and controls the WDM transmission apparatuses 21 to 24 from a remote location. Note that the number of WDM transmission apparatuses is not limited to four.

図2は、WDM伝送装置の構成を示すブロック図である。WDM伝送装置21は、監視制御基板9、可変波長トランスポンダ10、光カプラ31および光増幅部32を備えている。監視制御基板9は、可変波長トランスポンダ10、光カプラ31および光増幅部32の監視制御を行うとともに、監視制御端末30とのインタフェース機能も有する。光カプラ31は、光信号の波長多重および波長分離を行う。光増幅部32は、遠隔にある装置との通信を可能するために光信号を増幅する。   FIG. 2 is a block diagram illustrating a configuration of the WDM transmission apparatus. The WDM transmission apparatus 21 includes a monitoring control board 9, a variable wavelength transponder 10, an optical coupler 31, and an optical amplification unit 32. The supervisory control board 9 performs supervisory control of the variable wavelength transponder 10, the optical coupler 31, and the optical amplifier 32, and also has an interface function with the supervisory control terminal 30. The optical coupler 31 performs wavelength multiplexing and wavelength separation of optical signals. The optical amplifying unit 32 amplifies the optical signal to enable communication with a remote device.

図3は、可変波長トランスポンダの構成を示すブロック図である。可変波長トランスポンダ10は、OE(Optical/ Electric)変換部1、可変波長送信部2、EO(Electric/ Optical)変換部3、光受信部4、可変波長フィルタ5および障害検出部6を備えている。OE変換部1は、光信号から電気信号への変換を行う。可変波長送信部2は、波長切替制御部7から指示された波長で光信号の送信を行う。EO変換部3は、電気信号から光信号への変換を行う。光受信部4は、可変波長フィルタ5を透過した光信号を受信する。可変波長フィルタ5は、波長多重された光信号のうち波長切替制御部7によって指示された波長の光信号のみを透過させるフィルタである。障害検出部6は、可変波長フィルタ5または光受信部4から伝送路警報等の障害情報を検出する。波長切替制御部7は、可変波長送信部2および可変波長フィルタ5の波長を切り替える制御を行う。波長情報格納部8は、波長切替制御部7によって選択された波長について障害が検出された場合に、切り替えるための切替候補波長を格納する。   FIG. 3 is a block diagram showing the configuration of the variable wavelength transponder. The variable wavelength transponder 10 includes an OE (Optical / Electric) converter 1, a variable wavelength transmitter 2, an EO (Electric / Optical) converter 3, an optical receiver 4, a variable wavelength filter 5, and a fault detector 6. . The OE converter 1 performs conversion from an optical signal to an electrical signal. The variable wavelength transmission unit 2 transmits an optical signal at a wavelength instructed by the wavelength switching control unit 7. The EO conversion unit 3 performs conversion from an electrical signal to an optical signal. The optical receiver 4 receives the optical signal that has passed through the variable wavelength filter 5. The variable wavelength filter 5 is a filter that transmits only the optical signal having the wavelength designated by the wavelength switching control unit 7 among the wavelength-multiplexed optical signals. The failure detection unit 6 detects failure information such as a transmission path alarm from the variable wavelength filter 5 or the optical reception unit 4. The wavelength switching control unit 7 performs control to switch wavelengths of the variable wavelength transmission unit 2 and the variable wavelength filter 5. The wavelength information storage unit 8 stores a candidate wavelength for switching when a failure is detected for the wavelength selected by the wavelength switching control unit 7.

次に、本実施の形態の動作を説明する。   Next, the operation of the present embodiment will be described.

監視制御端末30から、監視制御基板9を経由して、波長情報格納部8には、予め、障害時に備えたネットワーク構成情報、即ち、切替候補波長情報を格納する。切替候補波長としては、選択波長と異なると共に多重化される他の波長とも異なる波長を予め決定しておき波長情報格納部8に格納しておく。障害検出部6では、可変波長フィルタ5または光受信部4から通知される伝送路の運用状態(障害情報)を常に監視しており、障害を検出した場合、伝送環境条件として障害検出を波長切替制御部7に通知する。ここで、障害検出が有る場合の伝送環境条件が波長切替を行う条件と等しく、障害検出が無い場合の伝送環境条件が波長切替を行わない条件に等しいものとする。波長切替制御部7では、伝送環境条件が切替を行う条件に適合する場合に、波長情報格納部8の情報に基づき、可変波長送信部2並びに可変波長フィルタ5に対し、自立的に、波長切替制御を実行する。切替実行後の運用波長状態は、監視制御基板9を通し、監視制御端末30へと通知され、ネットワーク全体の状態監視が行われる。こうして、新たな波長に関する通信パスが確立されたことを、遠隔から確認することが可能となる。   From the monitoring control terminal 30 via the monitoring control board 9, the wavelength information storage unit 8 stores in advance network configuration information prepared at the time of failure, that is, switching candidate wavelength information. As the switching candidate wavelength, a wavelength different from the selected wavelength and different from other multiplexed wavelengths is determined in advance and stored in the wavelength information storage unit 8. The fault detection unit 6 constantly monitors the operation state (failure information) of the transmission path notified from the variable wavelength filter 5 or the optical receiving unit 4, and when a fault is detected, the fault detection is switched as a transmission environment condition. Notify the control unit 7. Here, it is assumed that the transmission environment condition when there is failure detection is equal to the condition for performing wavelength switching, and the transmission environment condition when there is no failure detection is equal to the condition for not performing wavelength switching. In the wavelength switching control unit 7, when the transmission environment condition matches the switching condition, the wavelength switching control unit 7 performs wavelength switching independently for the variable wavelength transmission unit 2 and the variable wavelength filter 5 based on the information in the wavelength information storage unit 8. Execute control. The operating wavelength state after the switching is performed is notified to the monitoring control terminal 30 through the monitoring control board 9, and the state of the entire network is monitored. In this way, it is possible to remotely confirm that a communication path for a new wavelength has been established.

このように、波長情報格納部8に切替後の波長となる切替候補波長を予め格納しておくので、切替に要する時間を短縮することができ、波長切替を要するタイミングで即座に切替を実行することができる。したがって、サービスの停止を最小限に留め、新たな波長の通信パスを即座に確立することができる。また、選択波長と異なると共に多重化される他の波長とも異なる波長を切替候補波長として決定するので、多重化される他の波長と重なってしまう事態も未然に回避することができる。さらに、このような波長切替制御を用いた可変波長トランスポンダ10を適用することで、決まった波長の予備波長用品を用意する必要がなく、初期導入時に予め実装・配線をすることで、用品数の削減・保守性の向上を図ることが可能となる。   As described above, since the wavelength candidate storage wavelength that becomes the wavelength after switching is stored in the wavelength information storage unit 8 in advance, the time required for switching can be shortened, and switching is performed immediately at the timing when wavelength switching is required. be able to. Therefore, the service stoppage can be minimized and a communication path of a new wavelength can be established immediately. Further, since a wavelength that is different from the selected wavelength and different from other multiplexed wavelengths is determined as the switching candidate wavelength, it is possible to avoid a situation in which the wavelength overlaps with other multiplexed wavelengths. Furthermore, by applying the variable wavelength transponder 10 using such wavelength switching control, it is not necessary to prepare a spare wavelength product of a predetermined wavelength, and by mounting and wiring in advance at the time of initial introduction, the number of products can be reduced. Reduction and improvement in maintainability can be achieved.

実施の形態2.
図4は、本発明の実施の形態2に係るWDM伝送装置の構成を示すブロック図である。本実施の形態2に係るWDM伝送装置は、実施の形態1に係るWDM伝送装置の一部を変更したものである。以下、変更点について説明し、その他の構成および動作については、説明を省略する。
Embodiment 2. FIG.
FIG. 4 is a block diagram showing a configuration of a WDM transmission apparatus according to Embodiment 2 of the present invention. The WDM transmission apparatus according to the second embodiment is obtained by changing a part of the WDM transmission apparatus according to the first embodiment. Hereinafter, changes will be described, and description of other configurations and operations will be omitted.

実施の形態1では、各可変波長トランスポンダ10に波長切替制御部7および波長情報格納部8を設け、各可変波長トランスポンダ10でそれぞれ切替候補波長情報を管理し、波長切替を制御していたが、本実施の形態2では、波長切替制御部7および波長情報格納部8を監視制御基板9に設け、複数の可変波長トランスポンダ10に関する波長切替候補波長情報の管理および波長切替の制御を集中的に行うものである。また、監視制御基板9には、各可変波長トランスポンダ10の状態を監視する状態監視部11を設けている。   In the first embodiment, each variable wavelength transponder 10 is provided with the wavelength switching control unit 7 and the wavelength information storage unit 8, and each variable wavelength transponder 10 manages the switching candidate wavelength information and controls the wavelength switching. In the second embodiment, the wavelength switching control unit 7 and the wavelength information storage unit 8 are provided on the monitoring control board 9, and management of wavelength switching candidate wavelength information regarding a plurality of variable wavelength transponders 10 and control of wavelength switching are performed intensively. Is. The monitoring control board 9 is provided with a state monitoring unit 11 that monitors the state of each variable wavelength transponder 10.

次に、本実施の形態の動作を説明する。   Next, the operation of the present embodiment will be described.

監視制御端末30から、監視制御基板9に対し、波長情報格納部8には、予め、障害時に備えたネットワーク構成情報、即ち、切替候補波長情報を格納する。可変波長トランスポンダ10内にある障害検出部6では、可変波長フィルタ5または光受信部4から通知される伝送路の運用状態(障害情報)を常に監視しており、障害を検出した場合、監視制御基板9の波長切替制御部7へ障害検出を通知する。障害検出の通知を受けた波長切替制御部7では、波長情報格納部8の情報に基づき、可変波長トランスポンダ10にある可変波長送信部2並びに可変波長フィルタ5に対し、波長切替制御を実行する。切替実行後の運用波長状態は、監視制御基板9の状態監視部11で常に監視しており、その状態は監視制御端末30へと通知される。こうして、ネットワーク全体の状態監視が行われ、新たな通信パスが確立されたことを確認することが可能となる。   From the monitoring control terminal 30 to the monitoring control board 9, the wavelength information storage unit 8 stores in advance network configuration information prepared in the event of a failure, that is, switching candidate wavelength information. The failure detection unit 6 in the variable wavelength transponder 10 constantly monitors the operation state (failure information) of the transmission path notified from the variable wavelength filter 5 or the optical reception unit 4, and monitors and controls when a failure is detected. Notification of failure detection is sent to the wavelength switching control unit 7 of the substrate 9. The wavelength switching control unit 7 that has received the notification of the failure detection executes wavelength switching control for the variable wavelength transmission unit 2 and the variable wavelength filter 5 in the variable wavelength transponder 10 based on the information in the wavelength information storage unit 8. The operating wavelength state after switching is constantly monitored by the state monitoring unit 11 of the monitoring control board 9 and the state is notified to the monitoring control terminal 30. In this way, the status of the entire network is monitored, and it is possible to confirm that a new communication path has been established.

このように、監視制御基板9では、1つの可変波長トランスポンダ10を監視制御するだけでなく、複数の可変波長トランスポンダ10を監視制御することによって、WDM伝送装置21全体の波長情報を集中的に管理することができる。   As described above, the monitoring control board 9 not only monitors and controls one variable wavelength transponder 10, but also monitors and controls a plurality of variable wavelength transponders 10, thereby centrally managing wavelength information of the entire WDM transmission apparatus 21. can do.

実施の形態3.
図5は、本発明の実施の形態3に係るWDM伝送装置の構成を示すブロック図である。本実施の形態3に係るWDM伝送装置は、実施の形態1に係るWDM伝送装置に一部の構成を追加したものである。以下、追加点について説明し、その他の構成および動作については、説明を省略する。
Embodiment 3 FIG.
FIG. 5 is a block diagram showing a configuration of a WDM transmission apparatus according to Embodiment 3 of the present invention. The WDM transmission apparatus according to the third embodiment is obtained by adding a part of the configuration to the WDM transmission apparatus according to the first embodiment. Hereinafter, additional points will be described, and description of other configurations and operations will be omitted.

本実施の形態3に係るWDM伝送装置は、実施の形態1に係るWDM伝送装置の可変波長トランスポンダ10にそれぞれ状態監視部11を設けたものである。状態監視部11は、他の可変波長トランスポンダ10の状態を監視する。   In the WDM transmission apparatus according to the third embodiment, the state monitoring unit 11 is provided in each of the variable wavelength transponders 10 of the WDM transmission apparatus according to the first embodiment. The state monitoring unit 11 monitors the state of another variable wavelength transponder 10.

次に、本実施の形態の動作を説明する。   Next, the operation of the present embodiment will be described.

監視制御端末30から、監視制御基板9を経由して、波長情報格納部8には、予め、障害時に備えたネットワーク構成情報、即ち、切替候補波長情報を格納する。可変波長トランスポンダ10内にある障害検出部6では、可変波長フィルタ5または光受信部4から通知される伝送路の運用状態(障害情報)を常に監視しており、障害を検出した場合、波長切替制御部7へ障害検出を通知する。障害検出の通知を受けた波長切替制御部7では、波長情報格納部8の情報に基づき、可変波長送信部2並びに可変波長フィルタ5に対し、波長切替制御を実行する。切替実行後の運用波長状態は、状態監視部11にて、常に監視しており、その状態は監視制御基板9を通して、監視制御端末30へと通知される。こうして、ネットワーク全体の状態監視が行われ、新たな波長に関する通信パスが確立されたことを確認することが可能となる。   From the monitoring control terminal 30 via the monitoring control board 9, the wavelength information storage unit 8 stores in advance network configuration information prepared at the time of failure, that is, switching candidate wavelength information. The fault detection unit 6 in the variable wavelength transponder 10 constantly monitors the operation state (failure information) of the transmission path notified from the variable wavelength filter 5 or the optical receiving unit 4, and switches the wavelength when a fault is detected. Notifies the controller 7 of failure detection. The wavelength switching control unit 7 that has received the notification of the failure detection executes wavelength switching control for the variable wavelength transmission unit 2 and the variable wavelength filter 5 based on the information in the wavelength information storage unit 8. The operating wavelength state after switching is constantly monitored by the state monitoring unit 11, and the state is notified to the monitoring control terminal 30 through the monitoring control board 9. In this way, the status of the entire network is monitored, and it is possible to confirm that a communication path for a new wavelength has been established.

このように、可変波長トランスポンダ10は、自らの監視制御を行うだけでなく、他の可変波長トランスポンダ10の波長運用状態を監視することによって、複数の可変波長トランスポンダ10で同一波長を割り当ててしまう事態を未然に回避できる。   As described above, the variable wavelength transponder 10 not only performs its own monitoring and control, but also monitors the wavelength operation state of the other variable wavelength transponders 10, thereby assigning the same wavelength to the plurality of variable wavelength transponders 10. Can be avoided in advance.

実施の形態4.
図6は、本発明の実施の形態4に係る可変波長伝送システムの構成を示すブロック図である。本実施の形態4に係る可変波長伝送システムは、実施の形態3に係るWDM伝送装置を含む可変波長伝送システムに一部の構成を追加したものである。以下、追加点について説明し、その他の構成および動作については、説明を省略する。
Embodiment 4 FIG.
FIG. 6 is a block diagram showing a configuration of a variable wavelength transmission system according to Embodiment 4 of the present invention. The variable wavelength transmission system according to the fourth embodiment is obtained by adding a part of the configuration to the variable wavelength transmission system including the WDM transmission apparatus according to the third embodiment. Hereinafter, additional points will be described, and description of other configurations and operations will be omitted.

本実施の形態4に係る可変波長伝送システムは、実施の形態3に係るWDM伝送装置を含む可変波長伝送システムにおいて、監視制御端末30に波長状態管理部13および波長状態制御部14を設けたものである。波長状態管理部13は、ネットワーク全体の波長運用状態を管理する。波長状態制御部14は、波長状態管理部13が管理するネットワーク全体の波長運用状態に応じてWDM伝送装置21の波長切替を制御する。   The variable wavelength transmission system according to the fourth embodiment is a variable wavelength transmission system including the WDM transmission apparatus according to the third embodiment, in which the monitoring control terminal 30 is provided with the wavelength state management unit 13 and the wavelength state control unit 14. It is. The wavelength state management unit 13 manages the wavelength operation state of the entire network. The wavelength state control unit 14 controls wavelength switching of the WDM transmission apparatus 21 according to the wavelength operation state of the entire network managed by the wavelength state management unit 13.

次に、本実施の形態の動作を説明する。   Next, the operation of the present embodiment will be described.

監視制御端末30から、監視制御基板9を経由して、波長情報格納部8には、予め、障害時に備えたネットワーク構成情報、即ち、切替候補波長情報を格納する。可変波長トランスポンダ10内にある障害検出部6では、可変波長フィルタ5または光受信部4から通知される伝送路の運用状態(障害情報)を常に監視しており、障害を検出した場合、状態監視部11、監視制御基板9を通して監視制御端末30に通知される。監視制御端末30では、ネットワーク全体を考慮し、切替候補波長(可変波長トランスポンダ10に予め設定している切替候補波長情報)への切替を実行するかどうかを、波長状態制御部14にて判断する。当該WDM伝送装置21にて、或いは、ネットワーク全体を通して、切替候補波長への切替を実行しても問題なければ、監視制御基板9を経由し、波長切替制御を実行を指示する。波長切替制御部7では、上位からの実行指示、この場合、監視制御端末30からの波長切替実行指示に基づき、可変波長送信部2および可変波長フィルタ5に対して、切替制御を実行する。切替実行後の運用波長状態は、状態監視部11にて、常に監視しており、その状態は監視制御基板9を通して、監視制御端末30へと通知される。こうして、ネットワーク全体の状態監視が行われ、新たな波長に関する通信パスが確立されたことを確認することが可能となる。   From the monitoring control terminal 30 via the monitoring control board 9, the wavelength information storage unit 8 stores in advance network configuration information prepared at the time of failure, that is, switching candidate wavelength information. The fault detection unit 6 in the variable wavelength transponder 10 constantly monitors the operation state (failure information) of the transmission path notified from the variable wavelength filter 5 or the optical receiving unit 4, and monitors the state when a fault is detected. The monitoring control terminal 30 is notified through the unit 11 and the monitoring control board 9. In the monitoring control terminal 30, the wavelength state control unit 14 determines whether or not to perform switching to a switching candidate wavelength (switching candidate wavelength information set in advance in the variable wavelength transponder 10) in consideration of the entire network. . If there is no problem even if the switching to the switching candidate wavelength is performed in the WDM transmission apparatus 21 or through the entire network, execution of wavelength switching control is instructed via the monitoring control board 9. The wavelength switching control unit 7 executes switching control for the variable wavelength transmission unit 2 and the variable wavelength filter 5 based on an execution instruction from the host, in this case, a wavelength switching execution instruction from the monitoring control terminal 30. The operating wavelength state after switching is constantly monitored by the state monitoring unit 11, and the state is notified to the monitoring control terminal 30 through the monitoring control board 9. In this way, the status of the entire network is monitored, and it is possible to confirm that a communication path for a new wavelength has been established.

このように、監視制御端末30によりネットワーク全体の波長運用状態を集中管理することで、最適な波長へ制御が可能となる。   In this way, centralized management of the wavelength operation state of the entire network by the monitoring control terminal 30 enables control to the optimum wavelength.

本発明の実施の形態1に係る可変波長伝送システムのネットワーク構成図である。It is a network block diagram of the variable wavelength transmission system which concerns on Embodiment 1 of this invention. WDM伝送装置の構成を示すブロック図である。It is a block diagram which shows the structure of a WDM transmission apparatus. 可変波長トランスポンダの構成を示すブロック図である。It is a block diagram which shows the structure of a variable wavelength transponder. 本発明の実施の形態2に係るWDM伝送装置の構成を示すブロック図である。It is a block diagram which shows the structure of the WDM transmission apparatus which concerns on Embodiment 2 of this invention. 本発明の実施の形態3に係るWDM伝送装置の構成を示すブロック図である。It is a block diagram which shows the structure of the WDM transmission apparatus which concerns on Embodiment 3 of this invention. 本発明の実施の形態4に係る可変波長伝送システムの構成を示すブロック図である。It is a block diagram which shows the structure of the variable wavelength transmission system which concerns on Embodiment 4 of this invention.

符号の説明Explanation of symbols

1 OE変換部
2 可変波長送信部
3 EO変換部
4 光受信部
5 可変波長フィルタ
6 障害検出部
7 波長切替制御部
8 波長情報格納部
9 監視制御基板
10 可変波長トランスポンダ
11 状態監視部
13 波長状態管理部
14 波長状態制御部
15 監視制御端末
20 SDH伝送装置
21〜24 WDM伝送装置
30 監視制御端末
31 光カプラ
32 光増幅部

DESCRIPTION OF SYMBOLS 1 OE conversion part 2 Variable wavelength transmission part 3 EO conversion part 4 Optical reception part 5 Variable wavelength filter 6 Fault detection part 7 Wavelength switching control part 8 Wavelength information storage part 9 Monitoring control board 10 Variable wavelength transponder 11 Status monitoring part 13 Wavelength state Management unit 14 Wavelength state control unit 15 Monitoring control terminal 20 SDH transmission device 21 to 24 WDM transmission device 30 Monitoring control terminal 31 Optical coupler 32 Optical amplification unit

Claims (9)

複数の波長から選択された2以上の波長を多重化して光伝送を行い、伝送環境条件に応じて前記選択された波長を別の波長に切り替える制御を行う波長切替制御方法であって、
前記選択された波長毎に、その選択された波長と異なり、かつ多重化される他の波長とも異なる波長を切替候補波長として予め決定しておき、
前記選択された波長に関する伝送環境条件が所定条件に適合したときに、前記選択された波長を切替候補波長に切り替える制御を行うことを特徴とする波長切替制御方法。
A wavelength switching control method for performing optical transmission by multiplexing two or more wavelengths selected from a plurality of wavelengths, and performing control to switch the selected wavelength to another wavelength according to transmission environment conditions,
For each of the selected wavelengths, a wavelength that is different from the selected wavelength and different from other wavelengths to be multiplexed is determined in advance as a switching candidate wavelength,
A wavelength switching control method characterized by performing control to switch the selected wavelength to a switching candidate wavelength when a transmission environment condition relating to the selected wavelength meets a predetermined condition.
前記伝送環境条件は、伝送障害に関する条件であり、前記所定条件は、伝送障害の発生が検出される条件であることを特徴とする請求項1記載の波長切替制御方法。 2. The wavelength switching control method according to claim 1, wherein the transmission environment condition is a condition related to a transmission fault, and the predetermined condition is a condition for detecting the occurrence of the transmission fault. 複数の波長から選択された2以上の波長を多重化して光伝送を行う可変波長伝送装置であって、
前記選択された波長毎に、その選択された波長と異なり、かつ多重化される他の波長とも異なる波長を切替候補波長として予め格納しておくための波長情報格納部と、
前記選択された波長毎の伝送環境を検出する伝送環境検出部と、
前記選択された波長に関する伝送環境条件が所定条件に適合したときに、前記選択された波長を切替候補波長に切り替える制御を行う波長切替制御部とを備えたことを特徴とする可変波長伝送装置。
A variable wavelength transmission apparatus that performs optical transmission by multiplexing two or more wavelengths selected from a plurality of wavelengths,
For each selected wavelength, a wavelength information storage unit for storing in advance a wavelength that is different from the selected wavelength and that is different from other wavelengths to be multiplexed, as a switching candidate wavelength;
A transmission environment detector for detecting a transmission environment for each of the selected wavelengths;
A variable wavelength transmission apparatus comprising: a wavelength switching control unit that performs control to switch the selected wavelength to a switching candidate wavelength when a transmission environment condition related to the selected wavelength meets a predetermined condition.
前記多重化する各選択波長で光信号の送受信をそれぞれ行う可変波長トランスポンダを多重数だけ備えたことを特徴とする請求項3記載の可変波長伝送装置。 4. The variable wavelength transmission apparatus according to claim 3, further comprising a multiplex number of variable wavelength transponders that respectively transmit and receive optical signals at each of the selected wavelengths to be multiplexed. 前記可変波長トランスポンダは、前記波長情報格納部と伝送環境検出部と波長切替制御部とを備えたことを特徴とする請求項4記載の可変波長伝送装置。 5. The variable wavelength transmission apparatus according to claim 4, wherein the variable wavelength transponder includes the wavelength information storage unit, a transmission environment detection unit, and a wavelength switching control unit. 前記波長情報格納部は、全ての可変波長トランスポンダの選択波長に対応した切替候補波長を格納することを特徴とする請求項5記載の可変波長伝送装置。 6. The variable wavelength transmission apparatus according to claim 5, wherein the wavelength information storage unit stores a candidate wavelength for switching corresponding to a selection wavelength of all the variable wavelength transponders. 前記可変波長トランスポンダの監視制御を行う監視制御基板を備えたことを特徴とする請求項4記載の可変波長伝送装置。 The variable wavelength transmission apparatus according to claim 4, further comprising a monitoring control board that performs monitoring control of the variable wavelength transponder. 前記可変波長トランスポンダは、前記伝送環境検出部を備え、
前記監視制御基板は、前記波長情報格納部と波長切替制御部とを備えたことを特徴とする請求項7記載の可変波長伝送装置。
The variable wavelength transponder includes the transmission environment detection unit,
The variable wavelength transmission apparatus according to claim 7, wherein the monitoring control board includes the wavelength information storage unit and a wavelength switching control unit.
複数の波長から選択された2以上の波長を多重化して光伝送を行う複数の可変波長伝送装置とこの可変波長伝送装置を監視制御する監視制御端末とを含む可変波長伝送システムであって、
前記可変波長伝送装置は、
前記選択された波長毎に、その選択された波長と異なり、かつ多重化される他の波長とも異なる波長を切替候補波長として予め格納しておくための波長情報格納部と、
前記選択された波長毎の伝送環境を検出する伝送環境検出部と、
前記選択された波長に関する伝送環境条件が所定条件に適合したときに、前記選択された波長を切替候補波長に切り替える制御を行う波長切替制御部とを備え、
前記監視制御端末は、全ての可変波長伝送装置を監視し、その監視結果に基づき各可変波長伝送装置による波長切替の可否を判断することを特徴とする可変波長伝送システム。
A variable wavelength transmission system including a plurality of variable wavelength transmission apparatuses that perform optical transmission by multiplexing two or more wavelengths selected from a plurality of wavelengths, and a monitoring control terminal that monitors and controls the variable wavelength transmission apparatus,
The variable wavelength transmission device is:
For each selected wavelength, a wavelength information storage unit for storing in advance a wavelength that is different from the selected wavelength and that is different from other wavelengths to be multiplexed, as a switching candidate wavelength;
A transmission environment detector for detecting a transmission environment for each of the selected wavelengths;
A wavelength switching control unit that performs control to switch the selected wavelength to a switching candidate wavelength when a transmission environment condition related to the selected wavelength meets a predetermined condition;
The monitoring control terminal monitors all variable wavelength transmission apparatuses, and determines whether wavelength switching by each variable wavelength transmission apparatus is possible based on the monitoring result.
JP2004098717A 2004-03-30 2004-03-30 Wavelength switching control method, variable wavelength transmission apparatus, and variable wavelength transmission system Pending JP2005286736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004098717A JP2005286736A (en) 2004-03-30 2004-03-30 Wavelength switching control method, variable wavelength transmission apparatus, and variable wavelength transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004098717A JP2005286736A (en) 2004-03-30 2004-03-30 Wavelength switching control method, variable wavelength transmission apparatus, and variable wavelength transmission system

Publications (1)

Publication Number Publication Date
JP2005286736A true JP2005286736A (en) 2005-10-13

Family

ID=35184651

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004098717A Pending JP2005286736A (en) 2004-03-30 2004-03-30 Wavelength switching control method, variable wavelength transmission apparatus, and variable wavelength transmission system

Country Status (1)

Country Link
JP (1) JP2005286736A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008028928A (en) * 2006-07-25 2008-02-07 Fujitsu Ltd Wavelength multiplex optical transmission system and wavelength multiplex optical transmission method
JP2010516106A (en) * 2007-01-08 2010-05-13 アライド テレシス インコーポレーテッド Apparatus and method for automatically adjusting and setting the operating point of an APD receiver
JP2010213218A (en) * 2009-03-12 2010-09-24 Fujitsu Telecom Networks Ltd Wavelength multiplexing transmission system and wavelength multiplexing transmission control method
JP2011101216A (en) * 2009-11-06 2011-05-19 Fujitsu Ltd Optical transmitter and method for controlling wavelength variable optical output unit
US20110188866A1 (en) * 2010-01-29 2011-08-04 Fujitsu Limited Coherent optical communication device and method
US8666252B2 (en) 2011-03-16 2014-03-04 Fujitsu Limited Optical network system
JP2015050756A (en) * 2013-09-04 2015-03-16 日本電信電話株式会社 Wavelength variable optical transmitter, wavelength variable optical receiver, optical communication system, wavelength variable optical transmitting method, and wavelength variable optical receiving method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008028928A (en) * 2006-07-25 2008-02-07 Fujitsu Ltd Wavelength multiplex optical transmission system and wavelength multiplex optical transmission method
US7917033B2 (en) 2006-07-25 2011-03-29 Fujitsu Limited Wavelength-multiplexing optical transmission system and wavelength-multiplexing optical transmission method
JP2010516106A (en) * 2007-01-08 2010-05-13 アライド テレシス インコーポレーテッド Apparatus and method for automatically adjusting and setting the operating point of an APD receiver
JP2010213218A (en) * 2009-03-12 2010-09-24 Fujitsu Telecom Networks Ltd Wavelength multiplexing transmission system and wavelength multiplexing transmission control method
JP2011101216A (en) * 2009-11-06 2011-05-19 Fujitsu Ltd Optical transmitter and method for controlling wavelength variable optical output unit
US20110188866A1 (en) * 2010-01-29 2011-08-04 Fujitsu Limited Coherent optical communication device and method
JP2011160146A (en) * 2010-01-29 2011-08-18 Fujitsu Ltd Coherent optical communication device and method
US8958706B2 (en) 2010-01-29 2015-02-17 Fujitsu Limited Coherent optical communication device and method
US8666252B2 (en) 2011-03-16 2014-03-04 Fujitsu Limited Optical network system
JP2015050756A (en) * 2013-09-04 2015-03-16 日本電信電話株式会社 Wavelength variable optical transmitter, wavelength variable optical receiver, optical communication system, wavelength variable optical transmitting method, and wavelength variable optical receiving method

Similar Documents

Publication Publication Date Title
JP4423326B2 (en) Network management apparatus, optical add / drop node, and network management method
JP2005286736A (en) Wavelength switching control method, variable wavelength transmission apparatus, and variable wavelength transmission system
JPH10322287A (en) Output port switching device in n-wdm system
JP5414914B2 (en) Wavelength division multiplexing optical transmission system, transmitter, and receiver
JP2010041602A (en) Wavelength division multiplexer, and regenerative repeating method in wavelength division multiplexing network
JP4798711B2 (en) All-optical network quality monitoring device
US7480458B2 (en) Link system for photonic cross connect and transmission apparatus
JPH1155700A (en) Wavelength light adm device, optical signal fault monitor system using the device and ring network
JP2009296044A (en) Optical transmitter and optical transmitter-receiver
JP6252476B2 (en) Multi-failure optical node, optical communication system using the same, and wavelength path switching method
JP2006186538A (en) Optical transmission apparatus and method of changing optical transmission line
JP2005045541A (en) Optical subscriber transmission system
JP5863184B2 (en) Optical transmission system
WO2014010151A1 (en) Wavelength-division multiplex communication device and optical network system
JP5626212B2 (en) Communication system and communication method
JP2019057761A (en) Optical transmission device, optical transmission system and optical transmission method
JP5863750B2 (en) Broadcast system and center device
EP2234329A1 (en) The method and device for protecting the shared channel in the optical transmission system
EP4027589A1 (en) Submarine cable system, submarine appliance control device, method for controlling submarine appliance, and non-transitory computer-readable medium
JP2012114648A (en) Optical transmission device, optical transmission system and optical module
JP5206383B2 (en) Communication network management system, wavelength division multiplexing apparatus, communication management apparatus, communication network management method, and communication network management program
JP6278923B2 (en) Network system and telecommunications carrier side line terminator
JP6090876B2 (en) Transmission apparatus, transmission system, and path switching method
JPH05227098A (en) Optical communication fault detection system and optical communication system using the same
JP2002262316A (en) Optical communication network node device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060821

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080925

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20081014

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20090303