JP2962029B2 - Packet switch failure bypass method - Google Patents
Packet switch failure bypass methodInfo
- Publication number
- JP2962029B2 JP2962029B2 JP5943192A JP5943192A JP2962029B2 JP 2962029 B2 JP2962029 B2 JP 2962029B2 JP 5943192 A JP5943192 A JP 5943192A JP 5943192 A JP5943192 A JP 5943192A JP 2962029 B2 JP2962029 B2 JP 2962029B2
- Authority
- JP
- Japan
- Prior art keywords
- control unit
- line
- trunk line
- failure
- packet switch
- 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.)
- Expired - Lifetime
Links
Landscapes
- Detection And Prevention Of Errors In Transmission (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はパケット交換網における
データ通信方式、さらに詳しくいえば、中継回線に障害
が発生した場合にその通信の迂回路を形成するパケット
交換機の障害迂回方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication system in a packet-switched network, and more particularly, to a method of bypassing a failure in a packet switch which forms a communication detour when a failure occurs in a trunk line.
【０００２】[0002]
【従来の技術】従来のデータ通信網は中継回線が障害を
起こしたとき、終端の加入者（以下「ユーザ」という）
に障害を通知して通信を中断していた。ユーザは通信が
中断した場合、再発呼により新たな経路を選択して通信
の再開を行っていた。2. Description of the Related Art A conventional data communication network uses a terminating subscriber (hereinafter referred to as "user") when a trunk line fails.
Was notified of the failure and the communication was interrupted. When communication is interrupted, the user selects a new route by recalling and resumes communication.
【０００３】[0003]
【発明が解決しようとする課題】従来のデータ通信網で
は、ユーザが要求した通信は通信の正常終了を確認する
必要があり、効率が悪いという問題があった。また、デ
ータ通信網を使用してデータを提供するサービスでは、
端末装置から結果表示の素早い対応が要求されており、
回線障害による操作のやり直しは信頼性を低下させると
いう問題があった。さらに障害の再発呼で公衆網を使用
すると、即座に障害が復旧しても要求した通信が終了す
るまで公衆網の経路を使用するため不経済であった。本
発明の目的は上記問題を解決するもので、中継回線に障
害が発生してもユーザに障害を見せずに、かつ通信を中
断することなく継続させるパケット交換機の障害迂回方
式を提供することにある。In the conventional data communication network, it is necessary to confirm the normal termination of the communication requested by the user, and there is a problem that the efficiency is low. In a service that provides data using a data communication network,
Quick response of the result display is required from the terminal device,
There is a problem that re-operation due to a line failure lowers reliability. Further, when the public network is used for recalling a fault, even if the fault is immediately recovered, the route of the public network is used until the requested communication ends, which is uneconomical. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem, and to provide a packet switching apparatus failure bypass method that does not show a failure to a user even if a failure occurs in a trunk line and continues communication without interruption. is there.
【０００４】[0004]
【課題を解決するための手段】前記目的を達成するため
に本発明によるパケット交換機の障害迂回方式はデータ
通信の際、データが通過する経路を決定する交換制御部
と中継回線を収容し中継回線障害時に障害を検出できる
中継回線制御部を有するパケット交換機および専用線で
構築した専用のデータ通信網において、前記中継回線制
御部はパケット交換機間の中継回線が障害を生じたと
き、交換制御部に障害を通知し、交換制御部は障害を検
出した中継回線制御部と交換動作中の制御部にデータ転
送の規制指示を行い、前記規制指示中に代替の中継回線
を決定しこの代替回線が使用可能かを相手パケット交換
機と交渉し、前記交渉結果として代替の中継回線が使用
可能な場合に、前記障害を検出した中継回線制御部に代
替の中継回線制御部を通知することにより前記障害を検
出した中継回線制御部から代替の中継回線制御部へ通信
データを折り返すように構成してある。上記構成におい
て、前記交換動作中の制御部は端末回線で端末装置と接
続され、前記端末装置を制御する端末制御部とすること
ができる。In order to achieve the above object, the present invention provides a packet switching device with a failure bypass method, which includes a switching control unit for determining a route through which data passes in data communication and a trunk line. In a dedicated data communication network constructed by a packet switch having a trunk line control unit capable of detecting a failure at the time of failure and a dedicated line, the trunk line control unit is connected to the switching control unit when a failure occurs in the trunk line between the packet switches. Notifying the failure, the switching control unit issues a data transfer restriction instruction to the trunk line control unit that has detected the failure and the control unit that is performing the switching operation, determines an alternative trunk line during the restriction instruction, and uses this alternative line. Negotiates with the other packet switch whether it is possible, and if the alternative trunk line is available as a result of the negotiation, the alternative trunk line control unit Notifications are configured to wrap the communication data to an alternate transit trunk control unit from the relay circuit control unit that detected the fault by. In the above configuration, the control unit during the switching operation may be a terminal control unit that is connected to a terminal device via a terminal line and controls the terminal device.
【０００５】[0005]
【作用】上記構成によれば、通信中に中継回線に障害が
発生してもユーザに障害が発生したことを知らせずにそ
の回線の迂回路を形成し通信を継続させることができ
る。According to the above arrangement, even if a failure occurs in a relay line during communication, a detour of the line can be formed and communication can be continued without notifying the user of the failure.
【０００６】[0006]
【実施例】以下、図面を参照して本発明をさらに詳しく
説明する。図１は本発明による障害迂回方式を用いたパ
ケット交換機と中継回線よりなるパケット交換網の実施
例を示すブロック図である。パケット交換機１０および
２０はそれぞれ内部転送バス１０１，２０１，交換制御
部１０２，２０２，端末制御部１０３，２０３，中継回
線制御部１０４，２０４，１０５，２０５より構成され
ている。パケット交換機１０は端末回線１２により端末
１１と、パケット交換機２０は端末回線２２により端末
２１にそれぞれ接続され、パケット交換機１０および２
０同士は中継回線３で接続されている。また、代替回線
４を備えている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a packet switching network composed of a packet switch and a trunk line using a failure bypass method according to the present invention. Each of the packet switches 10 and 20 includes internal transfer buses 101 and 201, exchange control units 102 and 202, terminal control units 103 and 203, and trunk line control units 104, 204, 105 and 205, respectively. The packet switch 10 is connected to a terminal 11 via a terminal line 12, and the packet switch 20 is connected to a terminal 21 via a terminal line 22, respectively.
0s are connected by a relay line 3. Further, an alternative line 4 is provided.
【０００７】ここで、データ通信を要求した側を発呼端
末および発呼パケット交換機、受けた側を着呼端末およ
び着呼パケット交換機と呼ぶこととする。図２は図１の
パケット交換網の正常時のデータ通信路を示すブロック
図である。正常状態において、発呼端末１１がデータ通
信を要求すると、発呼パケット交換機１０の交換制御部
１０２は経路を決定し、中継回線３を選択し着呼端末２
１と通信する。Here, the side requesting the data communication is called a calling terminal and a calling packet switch, and the receiving side is called a called terminal and a called packet switch. FIG. 2 is a block diagram showing a data communication path in a normal state of the packet switching network of FIG. In the normal state, when the calling terminal 11 requests data communication, the switching control unit 102 of the calling packet switch 10 determines a route, selects the relay line 3, and
Communicate with 1.
【０００８】このデータ通信中に中継回線３が障害を起
こしデータ通信の継続が不可能になった場合、中継回線
制御部１０４および２０４は自局の交換制御部１０２お
よび２０２に障害通知信号１３および２３を送出する。
交換制御部１０２および２０２は障害の中継回線制御部
と交換動作中の自局の端末制御部１０３および２０３に
データ転送規制信号１４および２４を送出してデータが
障害回線に流れるのを防ぐ。そしてその間に代替の中継
回線を決定する。その方法は発呼側の交換制御部１０２
が代替回線４に対して代替許可交渉信号５１を送出し、
着呼側の交換制御部２０２に障害の代替としての使用が
可能か否かを確認する。可能であれば着呼側の交換制御
部２０２から代替許可通知信号５２が返送されることに
よって行っている。If the trunk line 3 fails during the data communication and the continuation of the data communication becomes impossible, the trunk line control units 104 and 204 send the failure notification signal 13 and 23 is sent out.
The switching control units 102 and 202 transmit the data transfer restriction signals 14 and 24 to the faulty trunk line control units and the terminal control units 103 and 203 of the local station that are performing the switching operation to prevent data from flowing on the faulty line. In the meantime, an alternative trunk line is determined. The method is based on the switching controller 102 of the calling side.
Sends an alternative permission negotiation signal 51 to the alternative line 4,
The switching control unit 202 on the called side checks whether it can be used as a substitute for the failure. If possible, the exchange control unit 202 on the called side returns the substitute permission notification signal 52 to perform this.
【０００９】代替回線が決定すると、交換制御部１０２
および２０２は障害の中継回線制御部１０４および２０
４に代替回線決定信号１５および２５を通知し、端末制
御部１０３および２０３へ指示したデータ転送規制を解
除する。これによって中継回線制御部１０４および２０
４はデータの折り返しを設定し、発呼端末１１から送信
されたデータは中継回線制御部１０４で折り返り、中継
回線制御部１０５、代替回線４を介して通信が継続され
る。図３にそのときの中継回線障害時のデータ通信経路
の迂回路を示す。When the alternative line is determined, the switching control unit 102
And 202 are faulty trunk line control units 104 and 20
4 is notified of the alternative line determination signals 15 and 25, and releases the data transfer restriction instructed to the terminal control units 103 and 203. Thereby, the trunk line control units 104 and 20
4 sets the data return, the data transmitted from the calling terminal 11 is returned by the trunk line control unit 104, and the communication is continued via the trunk line control unit 105 and the substitute line 4. FIG. 3 shows a detour of the data communication path in the event of a trunk line failure at that time.
【００１０】中継回線制御部１０４が中継回線障害を検
出した場合、上述の代替回線切り替え手順と同様な手順
によって相手パケット交換機２０と交渉する。すなわ
ち、交換制御部１０２に通知し、交換制御部１０２は代
替回線４を使用して着呼側の交換制御部２０２に対して
回線切り戻しが可能か否かを交渉する。可能な場合、そ
れぞれ中継回線制御部１０４および２０４にこれを通知
して折り返し状態を解除することにより元の通信経路に
切り戻す。When the trunk line control unit 104 detects a trunk line failure, it negotiates with the partner packet switch 20 according to a procedure similar to the above-mentioned alternative line switching procedure. That is, the switching control unit 102 is notified, and the switching control unit 102 negotiates with the exchange control unit 202 on the called side whether or not line switching back is possible using the alternative line 4. When it is possible, this is notified to the trunk line control units 104 and 204, respectively, and the return state is released, thereby switching back to the original communication path.
【００１１】[0011]
【発明の効果】以上、説明したように本発明によれば、
中継回線障害時に、パケット交換機の障害を検出した中
継回線制御で折り返して代替回線へ送信するように構成
されているので、ユーザに障害を見せずに、かつ通信を
中断することなく継続できる。また、中継回線の障害復
旧時に即座に元の回線への切り戻しが可能であるので、
公衆網の使用料金が最少で済み経済的であるという効果
がある。As described above, according to the present invention,
In the event of a trunk line failure, the configuration is such that the failure of the packet switch is detected and returned to the alternative line under the control of the trunk line, so that the communication can be continued without showing the user a failure and without interrupting the communication. In addition, since switching back to the original line is possible immediately when the failure of the trunk line is restored,
This has the effect of minimizing the cost of using the public network and being economical.
【図１】本発明によるパケット交換機の障害迂回方式の
実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of a failure bypass method for a packet switch according to the present invention.
【図２】図１のパケット交換機の正常状態のデータ通信
経路を示すブロック図である。FIG. 2 is a block diagram showing a data communication path of the packet switch of FIG. 1 in a normal state.
【図３】図１のパケット交換機の中継回線障害時のデー
タ通信経路を示すブロック図である。FIG. 3 is a block diagram showing a data communication path of the packet switch shown in FIG. 1 when a relay line fails.
３…中継回線 ４…代替回線 １０…発呼パケット交換機 １１…発呼端末 １２…発呼端末接続回線 １３，２３…中継回線障害通知信号 １４，２４…データ転送規制指示信号 １５，２５…代替回線決定通知信号 ２０…着呼パケット交換機 ２１…着呼端末 ２２…着呼端末接続回線 ５１…代替許可交渉信号 ５２…代替許可通知信号 １０１，２０１…データ転送バス １０２，２０２…交換制御部 １０３，２０３…端末制御部 １０４，１０５，２０４，２０５…中継回線制御部 DESCRIPTION OF SYMBOLS 3 ... Trunk line 4 ... Substitute line 10 ... Calling packet switch 11 ... Calling terminal 12 ... Calling terminal connection line 13,23 ... Trunk line fault notification signal 14,24 ... Data transfer regulation instruction signal 15,25 ... Substitute line Decision notification signal 20 ... Called packet switch 21 ... Called terminal 22 ... Called terminal connection line 51 ... Alternative permission negotiation signal 52 ... Alternative permission notification signal 101, 201 ... Data transfer bus 102, 202 ... Exchange controller 103, 203 ... terminal control units 104, 105, 204, 205 ... trunk line control units
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H04L 12/56 H04L 1/22 H04L 12/24 H04L 12/26 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) H04L 12/56 H04L 1/22 H04L 12/24 H04L 12/26
Claims (2)
を決定する交換制御部と中継回線を収容し中継回線障害
時に障害を検出できる中継回線制御部を有するパケット
交換機および専用線で構築した専用のデータ通信網にお
いて、 前記中継回線制御部はパケット交換機間の中継回線が障
害を生じたとき、交換制御部に障害を通知し、 交換制御部は障害を検出した中継回線制御部と交換動作
中の制御部にデータ転送の規制指示を行い、 前記規制指示中に代替の中継回線を決定しこの代替回線
が使用可能かを相手パケット交換機と交渉し、 前記交渉結果として代替の中継回線が使用可能な場合
に、前記障害を検出した中継回線制御部に代替の中継回
線制御部を通知することにより前記障害を検出した中継
回線制御部から代替の中継回線制御部へ通信データを折
り返すように構成したことを特徴とするパケット交換機
の障害迂回方式。In a data communication, a packet switch having a switching control unit for determining a route through which data passes and a trunk line control unit for accommodating a trunk line and detecting a failure when the trunk line fails, and a dedicated line constructed by a dedicated line. In the data communication network, when the relay line between the packet switches has a fault, the relay line control unit notifies the switching control unit of the fault, and the switching control unit performs a switching operation with the relay line control unit that has detected the fault. Of the data transfer restriction instruction to the control unit of the above, determines an alternative trunk line during the restriction instruction, negotiates with the partner packet switch whether this alternative line can be used, and an alternative trunk line can be used as a result of the negotiation. In such a case, by notifying the substitute trunk line control unit to the trunk line control unit that has detected the failure, the trunk line control unit that has detected the failure is sent to the substitute trunk line control unit. Failover method of packet switch, characterized by being configured to wrap signal data.
末装置と接続され、前記端末装置を制御する端末制御部
である請求項１記載のパケット交換機の障害迂回方式。2. The method according to claim 1, wherein the control unit during the switching operation is a terminal control unit connected to a terminal device via a terminal line and controlling the terminal device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5943192A JP2962029B2 (en) | 1992-02-13 | 1992-02-13 | Packet switch failure bypass method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5943192A JP2962029B2 (en) | 1992-02-13 | 1992-02-13 | Packet switch failure bypass method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05227213A JPH05227213A (en) | 1993-09-03 |
| JP2962029B2 true JP2962029B2 (en) | 1999-10-12 |
Family
ID=13113080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5943192A Expired - Lifetime JP2962029B2 (en) | 1992-02-13 | 1992-02-13 | Packet switch failure bypass method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2962029B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011120245A (en) * | 2005-10-14 | 2011-06-16 | Fujitsu Ltd | Access network selecting method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH079158B2 (en) * | 1988-09-26 | 1995-02-01 | 東海ゴム工業株式会社 | Packer |
-
1992
- 1992-02-13 JP JP5943192A patent/JP2962029B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011120245A (en) * | 2005-10-14 | 2011-06-16 | Fujitsu Ltd | Access network selecting method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05227213A (en) | 1993-09-03 |
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