JP2601184B2 - Line switching control signal transmission method - Google Patents
Line switching control signal transmission methodInfo
- Publication number
- JP2601184B2 JP2601184B2 JP6092364A JP9236494A JP2601184B2 JP 2601184 B2 JP2601184 B2 JP 2601184B2 JP 6092364 A JP6092364 A JP 6092364A JP 9236494 A JP9236494 A JP 9236494A JP 2601184 B2 JP2601184 B2 JP 2601184B2
- Authority
- JP
- Japan
- Prior art keywords
- control signal
- circuit
- station
- transmitting
- transmission
- 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
- Maintenance And Management Of Digital Transmission (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、回線切替制御信号の伝
送方式に関し、特に自局装置および対局装置間での回線
切替の食い違いをなくすための回線切替制御信号の伝送
方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission system of a line switching control signal, and more particularly to a transmission system of a line switching control signal for eliminating discrepancies in line switching between a local station device and a remote device.
【０００２】[0002]
【従来の技術】従来の回線切替制御信号の伝送方式にお
いては、自局要求検出回路からの回線切替の送信信号の
Ｎ回照合を行なう送信側照合回路と、該送信側照合回路
から出力された制御信号を受け、さらに該制御信号のＮ
回照合を行なう受信側照合回路とを有して構成されてい
る。2. Description of the Related Art In a conventional transmission system of a line switching control signal, a transmission side collation circuit for collating a line switching transmission signal from a local station request detection circuit N times, and a signal output from the transmission side collation circuit. Receiving a control signal, and N
And a receiving-side matching circuit for performing a first-time matching.
【０００３】[0003]
【発明が解決しようとする課題】この従来の回線切替制
御信号の伝送方式では自局装置側と対局装置側の両方に
おいて信号の照合を行なっている。すなわち、自局側の
送信側照合回路と対局側の受信側照合回路から出力され
る制御信号が共に正常な場合にのみ回線切替を行う。こ
こで、例えば、自局側の送信側照合回路が、現用回線を
予備回線に切り替えるための制御信号を対局側の受信側
照合回路に出力するが、このとき前記制御信号が異常で
あった場合に、送信側照合回路では現用回線を予備回線
に切り替えるという認識をしているのにもかかわらず、
受信側照合回路では現用回線を予備回線に切り替えると
いう認識はされない。したがって、自局装置側および対
局装置側の間で回線切替制御に食い違いが起こるという
問題があった。In the conventional line switching control signal transmission method, signal collation is performed on both the local station and the remote station. That is, line switching is performed only when both the control signals output from the transmission-side verification circuit on the local station side and the control signal output from the reception-side verification circuit on the opposite side are normal. Here, for example, the transmitting-side matching circuit of the own station outputs a control signal for switching the working line to the protection line to the receiving-side matching circuit of the opposite station, and when the control signal is abnormal at this time, In spite of the fact that the transmitting side verification circuit recognizes that the working line is switched to the protection line,
The receiving side matching circuit does not recognize that the working line is switched to the protection line. Therefore, there is a problem that a discrepancy occurs in the line switching control between the own station apparatus side and the opposite apparatus side.
【０００４】本発明は、自局装置側および対局装置側の
間で回線切替制御に食い違いが生じないような回線切替
制御信号の伝送方式を提供することを課題とする。An object of the present invention is to provide a transmission system of a line switching control signal which does not cause a difference in line switching control between the own station device side and the opposite device side.
【０００５】[0005]
【課題を解決するための手段】本発明によれば、現用回
線と予備回線の２つの回線を備え、送信機能及び受信機
能を有する自局装置と対局装置との間で回線切替の制御
信号を使用し前記現用回線と前記予備回線の回線切替を
行なうシステムであって、前記自局装置と前記対局装置
の送信側では、自局の要求に応じて前記制御信号を送出
する自局要求検出回路と、前記制御信号の異常の有無を
Ｎ回照合（Ｎは１以上の自然数）によって確認する送信
側照合回路と、前記制御信号が連続的に変化して所望の
制御信号が得られない場合に、前記制御信号が変化する
ことを禁止する自局要求連続変化禁止回路とを備え、前
記自局装置と前記対局装置の受信側には、前記送信側照
合回路から制御信号を受けて該制御信号の異常の有無を
判定する受信側照合回路とを具備して構成され、前記送
信側照合回路は、連続的に変化する制御信号のＮ回照合
を行う際、変化した制御信号が異常であった場合に、保
護時間を設けて該制御信号がさらに変化してしまうのを
防ぎ、前記保護時間だけ該制御信号の出力を維持するよ
うにして該制御信号を正常な信号として前記受信側照合
回路に送出することを特徴とする回線切替制御信号の伝
送方式が得られる。According to the present invention, a control signal for switching a line between a local station apparatus and a remote apparatus having two lines, a working line and a protection line, and having a transmitting function and a receiving function is provided. A system for switching between the working line and the protection line using a local station request detecting circuit for transmitting the control signal in response to a request from the local station on a transmitting side of the local station apparatus and the transmitting side of the remote apparatus. A transmitter-side matching circuit for checking the presence / absence of an abnormality in the control signal N times (where N is a natural number of 1 or more); and a method in which the control signal continuously changes and a desired control signal cannot be obtained. A self-station request continuous change prohibition circuit for prohibiting the control signal from changing, and receiving the control signal from the transmission-side matching circuit on the reception side of the self-station device and the reception device of the opposite device, and receiving the control signal. To determine whether there is an error The transmission-side matching circuit is configured to provide a protection time when the changed control signal is abnormal when performing the N-times matching of the continuously changing control signal. Circuit switching control for preventing the signal from further changing and transmitting the control signal as a normal signal to the reception-side matching circuit while maintaining the output of the control signal for the protection time. The signal transmission method is obtained.
【０００６】[0006]
【０００７】[0007]
【実施例】本説明の一実施例について図１を参照して説
明する。図１は本発明に係る回線切替用制御信号の伝送
方式を説明するためのブロック図である。One embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram for explaining a transmission method of a line switching control signal according to the present invention.
【０００８】自局装置と対局装置との間には、現用回線
（図示せず）と予備回線（図示せず）の２つの回線を備
え、送信機能及び受信機能を有する自局装置と対局装置
との間で回線切替の制御信号（図１における矢印）を使
用し前記現用回線と前記予備回線の回線切替を行なって
いる。自局装置及び対局装置の送信側には、それぞれ自
局の要求に応じて前記制御信号を送出する自局要求検出
回路１と、前記制御信号の異常の有無をＮ回照合（Ｎは
１以上の自然数）によって確認する送信側照合回路２
と、前記制御信号が連続的に変化して所望の制御信号が
得られない場合に、前記制御信号が変化することを禁止
する自局要求連続変化禁止回路４とが設けられている。
前記自局装置と前記対局装置の受信側には送信側照合回
路２から制御信号を受けて該制御信号の異常の有無を判
定する受信側照合回路３が設けられている。[0008] Two lines, a working line (not shown) and a protection line (not shown), are provided between the own station device and the opposite device, and have a transmitting function and a receiving function. The line switching between the working line and the protection line is performed using a line switching control signal (arrow in FIG. 1). The transmitting side of the local station device and the transmitting side of the remote device each check the local request detecting circuit 1 for transmitting the control signal in response to the request of the local station with N times (N is 1 or more) whether the control signal is abnormal. Sender collation circuit 2 to confirm by natural number of
And a local station request continuous change prohibition circuit 4 for prohibiting the control signal from changing when the control signal continuously changes and a desired control signal cannot be obtained.
On the receiving side of the local station apparatus and the receiving apparatus, there is provided a receiving side verification circuit 3 which receives a control signal from the transmission side verification circuit 2 and determines whether or not the control signal is abnormal .
【０００９】制御信号が連続的に変化した場合、例えば
最初の制御信号を第１の制御信号とし、変化した後の制
御信号を第２の制御信号とし、さらに変化した後の制御
信号を第３の制御信号とした場合に、送信側照合回路２
は、前記第１の制御信号を出力した後に、前記第２の制
御信号のＮ回照合を行う。このとき、前記第２の制御信
号が異常でその周期がＮ周期（Ｎは送信側照合回路２の
Ｎ回照合のＮである）よりも短い場合、自局要求連続変
化禁止回路４によって前記第３の制御信号の出力を禁止
し、該第２の制御信号の周期がＮ周期になるまで該第２
の制御信号を出力し続け、該第２の制御信号を正常な信
号として受信側照合回路３に送出する。When the control signal changes continuously, for example, the first control signal is used as the first control signal, the control signal after the change is used as the second control signal, and the control signal after the change is used as the third control signal. In the case where the control signal is
Performs the N-times collation of the second control signal after outputting the first control signal. At this time, if the second control signal is abnormal and its cycle is shorter than N cycles (N is N of the N-times collation of the transmission-side collation circuit 2), the local station request continuous change prohibition circuit 4 performs the second 3 is prohibited, and the second control signal is output until the cycle of the second control signal reaches N cycles.
And outputs the second control signal as a normal signal to the receiving side matching circuit 3.
【００１０】したがって、自局装置側からの制御信号を
対局装置側で誤った認識をして自局装置側と対局装置側
の間で食い違いが生ずるということを防ぐことができ
る。Therefore, it is possible to prevent a situation in which the control signal from the own station apparatus is erroneously recognized on the opposite apparatus side and a discrepancy occurs between the own station apparatus and the opposite apparatus side.
【００１１】[0011]
【発明の効果】本発明によれば、自局要求連続変化禁止
回路を設けたことにより自局要求が連続的に変化した場
合にも対局装置側に一定の時間同一の制御信号を送信す
るので、対局装置側で自局装置側から送信した制御信号
が必ず認識でき、自局装置側と対局装置側の間で食い違
い無く回線切替の制御を行うことができる。According to the present invention, the same control signal is transmitted to the remote control device for a certain period of time even when the request of the own station changes continuously by providing the continuous change inhibition circuit of the own station request. On the other hand, the control signal transmitted from the own station apparatus side can be always recognized on the opposite apparatus side, and the line switching control can be performed without discrepancy between the own station apparatus side and the opposite apparatus side.
【図１】本発明に係る回線切替用制御信号の伝送方式を
説明するためのブロック図である。FIG. 1 is a block diagram illustrating a transmission method of a line switching control signal according to the present invention.
１ 自局要求検出回路 ２ 送信側照合回路 ３ 受信側照合回路 ４ 自局要求連続変化禁止回路 1 self-station request detection circuit 2 transmission-side verification circuit 3 reception-side verification circuit 4 own-station request continuous change prohibition circuit
Claims (1)
え、送信機能及び受信機能を有する自局装置と対局装置
との間で回線切替の制御信号を使用し前記現用回線と前
記予備回線の回線切替を行なうシステムであって、前記
自局装置と前記対局装置の送信側では、自局の要求に応
じて前記制御信号を送出する自局要求検出回路と、前記
制御信号の異常の有無をＮ回照合（Ｎは１以上の自然
数）によって確認する送信側照合回路と、前記制御信号
が連続的に変化して所望の制御信号が得られない場合
に、前記制御信号が変化することを禁止する自局要求連
続変化禁止回路とを備え、前記自局装置と前記対局装置
の受信側には、前記送信側照合回路から制御信号を受け
て該制御信号の異常の有無を判定する受信側照合回路と
を具備して構成され、前記送信側照合回路は、連続的に
変化する制御信号のＮ回照合を行う際、変化した制御信
号が異常であった場合に、保護時間を設けて該制御信号
がさらに変化してしまうのを防ぎ、前記保護時間だけ該
制御信号の出力を維持するようにして該制御信号を正常
な信号として前記受信側照合回路に送出することを特徴
とする回線切替制御信号の伝送方式。1. A communication system comprising two lines, a working line and a protection line, having a transmission function and a reception function. A system for performing line switching, wherein a transmitting side of the own station device and the transmitting device transmits a control signal in response to a request of the own station, a own station request detecting circuit, and the presence or absence of abnormality of the control signal. A transmitting-side matching circuit that checks by N-times matching (N is a natural number of 1 or more), and prohibits a change in the control signal when the control signal continuously changes and a desired control signal cannot be obtained. A self-station request continuous change prohibition circuit, and the receiving side of the self-station device and the receiving device receives a control signal from the transmission-side verification circuit and determines whether or not the control signal is abnormal. And a circuit, The transmission-side matching circuit provides a protection time to prevent the control signal from further changing when the changed control signal is abnormal when performing the N-times matching of the continuously changing control signal. Transmitting the control signal as a normal signal to the reception-side matching circuit while maintaining the output of the control signal for the protection time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6092364A JP2601184B2 (en) | 1994-04-28 | 1994-04-28 | Line switching control signal transmission method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6092364A JP2601184B2 (en) | 1994-04-28 | 1994-04-28 | Line switching control signal transmission method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07297885A JPH07297885A (en) | 1995-11-10 |
| JP2601184B2 true JP2601184B2 (en) | 1997-04-16 |
Family
ID=14052365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6092364A Expired - Lifetime JP2601184B2 (en) | 1994-04-28 | 1994-04-28 | Line switching control signal transmission method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2601184B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53114057A (en) * | 1977-03-17 | 1978-10-05 | Yokogawa Electric Works Ltd | Method of adjusting resistance value of film resistor |
| JP2551838B2 (en) * | 1989-03-31 | 1996-11-06 | 日本電信電話株式会社 | Backup line switching method |
| JPH03250827A (en) * | 1990-02-28 | 1991-11-08 | Toshiba Corp | Digital modem |
-
1994
- 1994-04-28 JP JP6092364A patent/JP2601184B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07297885A (en) | 1995-11-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19961126 |