JPH01241227A - Transmission line switching and controlling method - Google Patents
Transmission line switching and controlling methodInfo
- Publication number
- JPH01241227A JPH01241227A JP63067384A JP6738488A JPH01241227A JP H01241227 A JPH01241227 A JP H01241227A JP 63067384 A JP63067384 A JP 63067384A JP 6738488 A JP6738488 A JP 6738488A JP H01241227 A JPH01241227 A JP H01241227A
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- order group
- switching control
- transmission
- lines
- 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 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims description 17
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
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- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はデジタル通信網の伝送路の切替制御力法に係り
、特に規模の小さなシステムに好適な制御方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control method for switching transmission paths in a digital communication network, and particularly to a control method suitable for small-scale systems.
通信網の信頼性向上のため、伝送路に障害が発生したと
きには現用伝送路を予備伝送路に切替える必要がある。In order to improve the reliability of communication networks, it is necessary to switch the working transmission line to a backup transmission line when a failure occurs in the transmission line.
従来、この伝送路の切替制御方式％式％）
頁から第７７頁において論じられているように、切替の
次群は同じであり、同−次群内の現用系と予備系を切替
えることによって行われていた。Conventionally, as discussed on pages 77 to 77 of the switching control method for this transmission line, the next group of switching is the same, and by switching between the working system and the standby system within the same group, It was done.
上記従来技術は回線数の多い大規模システムに適したも
のであり、回線数の少い小規模システムには適していな
かった。すなわち、回線数の多い場合には、各中継局間
に同一次群の複数のルートを設定できるために、あるル
ートで障害が起こった場合、従来の方式のように同−次
群内の他ルートに切替えて伝送することが可能である。The above-mentioned conventional technology is suitable for a large-scale system with a large number of lines, but is not suitable for a small-scale system with a small number of lines. In other words, when there are a large number of lines, it is possible to set up multiple routes of the same degree group between each relay station, so if a failure occurs in one route, other routes in the same degree group can be set up like in the conventional method. It is possible to switch to the route and transmit.
しかし、回線数の少い小規模システムの場合には、ある
中継局から別の中継局へは高次群伝送路が現用系。However, in the case of a small-scale system with a small number of lines, a high-order group transmission line is used as the active system from one relay station to another.
予備系それぞれ１本ずつしか張られていす、そこにすべ
ての回線が収容されている場合がある。このようなシス
テムにおいては、その現用伝送路、予備伝送路ともに障
害が発生した場合、同次群内での迂回ルートの設定がで
きず、従来の切替制御方式ではこれを救済する手段がな
かった。In some cases, only one line is installed in each standby system, and all the lines are accommodated there. In such a system, if a failure occurs in both the active transmission line and the backup transmission line, it is not possible to set a detour route within the homogeneous group, and conventional switching control methods have no way to remedy this situation. .
本発明の目的は、ある次群の現用伝送路、予備伝送路と
ともに障害を起こした場合でも、その伝送路で送られて
いた回線の一部あるいは全部を救済する切替制御方法を
提供することである。An object of the present invention is to provide a switching control method that can rescue part or all of the lines that were being sent on that transmission line even if a failure occurs along with the working transmission line and the backup transmission line of the next group. be.
上記目的は、同一切替スイッチに次群の異なる伝送装置
を接続し、高次群伝送路が現用系、予備系ともに使用不
能になったときには低次群伝送路の予備系を通して伝送
することで達成される。The above purpose is achieved by connecting different transmission devices of the next group to the same changeover switch, and transmitting data through the backup system of the low-order group transmission line when both the active system and the protection system of the high-order group transmission line become unusable. .
本発明においては、高次群側の伝送路が現用系予備系と
もに障害を発生したとき、その信号を受けた切替スイッ
チ制御装置が、自局および相手局に対して、高次群伝送
路で送られていた回線のうちの一つを選択して、同じ切
替スイッチに接続されている低次群伝送路の予備系を使
ってその選択された回線を伝送するようにスイッチを切
替える。In the present invention, when a failure occurs in both the active and protection transmission lines on the higher-order group side, the changeover switch control device that receives the signal sends the signal to the own station and the other station via the higher-order group transmission line. One of the lines is selected and the switch is changed so that the selected line is transmitted using the backup system of the low-order group transmission line connected to the same changeover switch.
したがって、障害を受けた高次群伝送路を用いて伝送さ
れていた回線の少くとも一本は救済されることになる。Therefore, at least one line that was transmitting using the faulty high-order group transmission line will be rescued.
このとき、同一スイッチに低次群伝送路の予備系が他に
も接続されていれば、救済される回線数が増えることに
なる。At this time, if other backup systems of low-order group transmission lines are connected to the same switch, the number of lines to be rescued will increase.
以下本発明の一実施例を第１図、第２図によって説明す
る。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
第１図は本発明の実施例の構成図である。この実施例に
おいては、本発明を日本のデジタルハイアラーキの４次
群（伝送路ビットレート１１１，６８９Ｍｂ／Ｓ）と５
次群（伝送路ビットレート４４５．８３７Ｍ ｂ ／
ｓ ）のシステムに適用した。FIG. 1 is a block diagram of an embodiment of the present invention. In this embodiment, the present invention is applied to the 4th order group of Japanese digital hierarchy (transmission line bit rate 111,689 Mb/S) and 5
Next group (transmission path bit rate 445.837M b /
s) system.
中継局Ａにおいては、４次群信号は切替スイッチ１を経
由して５次群多重化端局中継装置２、あるいは４次群端
局中継装置３に接続されている。In the relay station A, the 4th order group signal is connected to the 5th order group multiplexing terminal station relay device 2 or the 4th order group terminal station relay device 3 via the changeover switch 1.
中継局Ｂも同じ構成で、ＡＢ間は５次群光ファイバ伝送
路（現用系５、予備系６）で接続されている。一方４次
群の伝送路は中継局Ａ、Ｂと中継局Ｃの間にそれぞれ現
用系７と予備系８が張られている。Relay station B also has the same configuration, and AB is connected by a 5th order optical fiber transmission line (working system 5, protection system 6). On the other hand, in the fourth order transmission line, a working system 7 and a protection system 8 are installed between relay stations A, B and C, respectively.
切替制御は各装置からの監視制御情報を各局ごとに切替
制御装置４．４’ 、４’に集めて、切替スイッチ１，
１′を制御することによって行われる。切替の要求が衝
突した場合はあらかじめ設定した優先順位
Ａ＞Ｂ＞Ｃ
に従って上位局を優先に処理する。なお、監視制御情報
は主信号中の余剰ビットに重畳した他局に伝送する。５
次群伝送路余所の場合は４次群の余剰ビットに重畳する
。For switching control, supervisory control information from each device is collected in the switching control devices 4.4' and 4' for each station, and
1'. If switching requests conflict, the higher station is processed preferentially according to the preset priority order A>B>C. Note that the supervisory control information is transmitted to other stations superimposed on surplus bits in the main signal. 5
In the case of extra bits on the next group transmission path, it is superimposed on the extra bits of the fourth order group.
以下に本実施例の切替制御動作を説明する。The switching control operation of this embodiment will be explained below.
第２図に５次群伝送路に障害が起こった場合の動作を示
す。FIG. 2 shows the operation when a failure occurs in the quintic group transmission line.
通常時、切替制御装置４．４’ 、４’は４次群と５次
群の伝送路の現用予備切替を独立に制御する。すなわち
現用系に障害が発生した場合、同一次群の予備系に切替
えるように、切替制御装置はスイッチを制御する（当然
相手局の切替制御装置と連動して切替える）。第２図の
フローでは、５次群現用系５に障害が発生すると（２１
）、まず予備系の状態をチェックレ（２２）、ＯＫなら
ばＡＢ局間の予備系６に相替えて（２３）、伝送を再開
する（２４）。Under normal conditions, the switching control devices 4.4' and 4' independently control switching of the fourth-order group and the fifth-order group transmission lines for use and protection. That is, when a failure occurs in the active system, the switching control device controls the switch so as to switch to the backup system of the same next group (naturally, it switches in conjunction with the switching control device of the partner station). In the flow shown in Figure 2, when a failure occurs in the quintic group active system 5 (21
), first check the status of the backup system (22), and if OK, replace it with the backup system 6 between AB stations (23), and resume transmission (24).
また０局では、通常時はＡ、Ｃ局間とＢ、Ｃ局間の伝送
路は独立に制御される。ここまでは従来の切替方式と同
じである。In the case of station 0, the transmission paths between stations A and C and between stations B and C are normally controlled independently. The process up to this point is the same as the conventional switching method.
しかし、５次群伝送路の現用系、予備系ともに障害が発
生した場合すなわち第２図２２のチエツクで予備系にも
障害があった場合、切替制御装置は以下のように動作し
て、５次群伝送路で送られていた情報を救済しようとす
る。However, if a failure occurs in both the active system and the protection system of the 5th order group transmission line, that is, if there is a failure in the protection system as well in the check shown in FIG. 22, the switching control device operates as follows, An attempt is made to rescue the information being sent on the next group transmission path.
１）Ａ−Ｂ間の伝送路で障害が発生したという信号をＡ
、ＢＷＩｉの切替制御装置が受けとり、あらかじめ設定
されていたルートＡ−Ｃ間、 Ｂ−Ｃ間の４次群の予備
系を調べ（２５）、ルー１〜Ａ−Ｃ−Ｂが確保できるこ
とを確認する。1) A signal indicating that a failure has occurred on the transmission path between A and B
, received by the BWIi switching control device, checked the preset 4th order group backup system between routes A and C and B and C (25), and confirmed that routes 1 to AC and B can be secured. do.
２）ルートＡ−Ｃ−Ｂが確保できない場合は、５次群で
送られていた情報を救済できないことを表示して終了す
る（２６．２７）。2) If the route A-C-B cannot be secured, it is displayed that the information sent in the quintic group cannot be saved and ends (26.27).
３）ルートＡ−Ｃ−Ｂを確保できる場合は、Ａ局が上位
局となって各局のスイッチ切替制御信号を送出する。す
なわち、Ａ局の切替制御装置４は、あらかじめ回線優先
順位設定装置９で設定された順位を読とり（２８）、そ
の順位にしたがって、５次群伝送路で送られていた回線
の一部を４次群予備系を通して伝送するように切替制御
信号を各局に送出する。具体的には、Ａ、Ｂ局では多重
化端局装置２に接続されていた回線の一部を４次群端局
中継装置３の予備系に接続し、０局ではＡ−Ｃ局間、Ｂ
−Ｃ局間の４次群予備系を接続するように各局のスイッ
チを制御する信号を送出する。この信号は４次群フレー
ム中の余剰ビットに挿入されて各局に伝送される。3) If route A-C-B can be secured, station A becomes the higher-level station and sends out switch switching control signals for each station. That is, the switching control device 4 of the A station reads the order set in advance by the line priority setting device 9 (28), and according to the order, selects a part of the line sent on the 5th order group transmission line. A switching control signal is sent to each station so as to be transmitted through the fourth-order group backup system. Specifically, at stations A and B, a part of the line connected to the multiplexing terminal equipment 2 is connected to the backup system of the 4th-order terminal station relay equipment 3, and at the 0th station, between the A and C stations, B
- Sends a signal to control the switches of each station so as to connect the fourth-order group backup system between the C stations. This signal is inserted into the extra bits in the quartic group frame and transmitted to each station.
４）タイミングを合わせて各局のスイッチを切替え（２
９）救済された回線を表示して（３０）、伝送再開とな
る（３１）。4) Change the switches of each station at the same time (2)
9) Display the rescued line (30) and resume transmission (31).
本実施例では、Ａ、Ｂｉ間に４次群のルートがＡ−Ｃ−
Ｂの１本しか設定できないために５次群に接続されてい
る回線のうち】−本分しか救済できないが、多数のルー
トが設定できる場合、すべての回線を救済することも可
能である。In this example, the root of the quartic group between A and Bi is A-C-
Since only one line of B can be set, only one line connected to the quintic group can be rescued, but if a large number of routes can be set, it is also possible to rescue all lines.
なお、本実施例では、高次群に接続されている回線の優
先順位をあらかじめ設定しておくようにしたが、他の方
法でも有効である。たとえば、高次群に接続されている
各回線のトラヒックを測定し、障害発生時のトラヒック
の多い回線を低次群予備系を用いて救済する方法でも良
い。In this embodiment, the priorities of lines connected to higher-order groups are set in advance, but other methods are also effective. For example, a method may be used in which the traffic on each line connected to the high-order group is measured and the line with high traffic when a failure occurs is rescued using the low-order group backup system.
以上述べたように、本発明の切替制御方法によれば高次
群伝送路の現用系、予備系ともに障害が発生した場合で
も、高次群伝送路が送られていた回線の一部を低次群予
備系を使って救済することができる。As described above, according to the switching control method of the present invention, even if a failure occurs in both the active system and the protection system of the high-order group transmission line, a part of the line on which the high-order group transmission line was being sent is switched to the low-order group protection system. can be used to rescue.
第１図は本発明の一実施例の構成図、第２図は実施例に
おける切替制御のフロー図である。
１・・・切換スイッチ、２・・・５次群多重化端局中継
装置、３・・・４次群端局中継装置、４・・・切替制御
装置、５・・・５次群現用伝送路、６・・・５次群予備
伝送路。
７・・・４次群現用伝送路、８・・・４次群予備伝送路
、不 １ 図
５５広」シ￥ｗ、イテミ瓜FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a flowchart of switching control in the embodiment. DESCRIPTION OF SYMBOLS 1... Changeover switch, 2... 5th order group multiplexing terminal station relay device, 3... 4th order group terminal station relay device, 4... Switching control device, 5... 5th order group active transmission line, 6...5th order group backup transmission line. 7... 4th order group working transmission line, 8... 4th order group protection transmission line, not shown
Claims (1)
装置を接続し、異なる次群間で伝送路を切替えることを
特徴とする伝送路切替制御方法。 ２、高次群伝送路が現用系予備系ともに伝送不能になつ
たとき、高次群伝送路を通して送られていた回線のうち
、あらかじめ定めた優先順位の高い回線を低次群予備系
を用いて伝送するように切替えることを特徴とする請求
項１記載の伝送路切替制御方法。 ３、高次群伝送路が現用系予備系ともに伝送不能になつ
たとき、高次群伝送路を通して送られていた回線のうち
、その時のトラヒックの多い回線を低次群予備系を用い
て伝送するように切替えることを特徴とする請求項１記
載の伝送路切替制御方法。[Scope of Claims] 1. A transmission line switching control method characterized by connecting different transmission devices of next groups to the same transmission line switching switch and switching the transmission lines between the different next groups. 2. When both the active and protection systems on the high-order group transmission line become unable to transmit, a line with a predetermined high priority among the lines sent through the high-order group transmission line is transmitted using the low-order group protection system. 2. The transmission path switching control method according to claim 1, wherein the transmission path switching control method is characterized in that the transmission path switching control method is performed by switching to the transmission line switching control method. 3. When both the active and protection systems on the high-order group transmission line become unable to transmit, among the lines that were being sent through the high-order group transmission line, the line with the most traffic at that time is switched to transmit using the low-order group protection system. The transmission path switching control method according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63067384A JPH01241227A (en) | 1988-03-23 | 1988-03-23 | Transmission line switching and controlling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63067384A JPH01241227A (en) | 1988-03-23 | 1988-03-23 | Transmission line switching and controlling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01241227A true JPH01241227A (en) | 1989-09-26 |
Family
ID=13343458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63067384A Pending JPH01241227A (en) | 1988-03-23 | 1988-03-23 | Transmission line switching and controlling method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01241227A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5648676A (en) * | 1990-09-10 | 1997-07-15 | Fujitsu Limited | Semiconductor device with protective element |
-
1988
- 1988-03-23 JP JP63067384A patent/JPH01241227A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5648676A (en) * | 1990-09-10 | 1997-07-15 | Fujitsu Limited | Semiconductor device with protective element |
| US5670885A (en) * | 1990-09-10 | 1997-09-23 | Fujitsu Limited | Semiconductor device |
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