JPS63268318A - Standby set changeover system - Google Patents
Standby set changeover systemInfo
- Publication number
- JPS63268318A JPS63268318A JP10195487A JP10195487A JPS63268318A JP S63268318 A JPS63268318 A JP S63268318A JP 10195487 A JP10195487 A JP 10195487A JP 10195487 A JP10195487 A JP 10195487A JP S63268318 A JPS63268318 A JP S63268318A
- Authority
- JP
- Japan
- Prior art keywords
- alarm
- switching
- fault
- transmission
- transmitting
- 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 claims abstract description 33
- 230000005856 abnormality Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000012806 monitoring device Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は、セット予備切替方式に間し、特に、中継局を
有するデジタル無線伝送システムに使用して好適なセッ
ト予備切替方式に間する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a set protection switching system, and particularly to a set protection switching system suitable for use in a digital wireless transmission system having a relay station.
[従来の技術]
デジタル無線伝送では、各無線端局間に中間中継局を設
置したデジタル無線伝送システムを構成することがある
。[Prior Art] In digital wireless transmission, a digital wireless transmission system is sometimes configured in which an intermediate relay station is installed between each wireless terminal station.
第3図は、このような中間中継局を有するデジタル無線
伝送システムの構成図である。FIG. 3 is a block diagram of a digital wireless transmission system having such an intermediate relay station.
同図において、11.12は無線端局、13〜15は中
間中継局であり、中間中継局13〜15を介して無線端
局11と無線端局12との間で無線によってデジタル信
号を伝送している。In the figure, 11 and 12 are wireless terminal stations, and 13 to 15 are intermediate relay stations, and digital signals are transmitted wirelessly between the wireless terminal station 11 and the wireless terminal station 12 via the intermediate relay stations 13 to 15. are doing.
上記構成において、無線端局11から無線端局12に対
して信号を伝送する際に、例えば中間中継局13の送信
装置で機器障害が起きたとする。In the above configuration, when transmitting a signal from the wireless terminal station 11 to the wireless terminal station 12, it is assumed that, for example, a device failure occurs in the transmitting device of the intermediate relay station 13.
このとき、中間中継局13での障害によって送信装置の
警報回路が働かなけれは、中間中継局13゜14の間の
回線が異常となるにもかかわらず、この伝送回線は救済
されることがないという問題が生じる。At this time, unless the alarm circuit of the transmitting device is activated due to a failure at the intermediate relay station 13, the transmission line will not be rescued even though the line between the intermediate relay stations 13 and 14 becomes abnormal. A problem arises.
このため、デジタル無線伝送システムでは、中継器にこ
のような事態が発生しても送信側で障害のある装置から
正常な装置へ切り替えることができるようにする必要が
ある。Therefore, in a digital wireless transmission system, even if such a situation occurs in a repeater, it is necessary to be able to switch from a faulty device to a normal device on the transmitting side.
第2図はこのようなデジタル無線伝送システムにおける
従来のセット予備(Ho t−5t andby)切替
方式を採用した中間中継局のブロック図である。このセ
ット予備切替方式とは、障害発生時に装置ごとに予め用
意されている予備装置に切り替えて回線を救済するもの
である。FIG. 2 is a block diagram of an intermediate relay station that employs a conventional hot-and-by switching method in such a digital wireless transmission system. This set backup switching method is a method for saving the line by switching to a backup device prepared in advance for each device when a failure occurs.
同図において、la、lbはそれぞれ送−借倒および受
信側のハイブリッドであり、セット予備方式の送信装置
2a、2bと受信装置3a、3bに信号を分配する。4
a、4bは切替器であり、セット予備方式の送信装置2
a、2bと受信装置3a、3bの信号を切り替える。In the figure, la and lb are transmission-default and reception-side hybrids, respectively, and distribute signals to transmitters 2a, 2b and receivers 3a, 3b of the set backup system. 4
a and 4b are switching devices, which are set reserve type transmitter 2;
The signals of a, 2b and receiving devices 3a, 3b are switched.
5a、5bはそれぞれ送信側および受信側の警報回路で
あり、送信装置2a、2bまたは受信装置3a、3bに
機器障害生じた場合に、制御回路6a、6bに通知し、
切替器4a、4bによってセット予備切替を行なう。5a and 5b are alarm circuits on the transmitting side and receiving side, respectively, which notify the control circuits 6a and 6b when a device failure occurs in the transmitting devices 2a and 2b or the receiving devices 3a and 3b;
Set preliminary switching is performed by the switching devices 4a and 4b.
上記構成において、送信側ではハイブリッドlaによっ
て送信信号を分配し、それぞれ現用および予備の二つの
送信装置2a、2bによって無線周波数の信号に変調す
る。そして、切替器4aによって選択されたーの信号が
電波として送信される。In the above configuration, on the transmitting side, a transmission signal is distributed by the hybrid LA, and modulated into a radio frequency signal by two transmitting apparatuses 2a and 2b, one for use and one for backup. Then, the - signal selected by the switch 4a is transmitted as a radio wave.
受信側では到来した電波を受信してハイブリッドlbで
現用および予備の二つの受信装置3a。On the receiving side, the incoming radio waves are received by a hybrid lb using two receiving devices 3a, one in use and one in reserve.
3bに分配する。分配された受信信号は復調され、切替
器4bによって選択されたものが、次の中間中継局に対
する送信側へ送られる。Distribute to 3b. The distributed received signals are demodulated, and the one selected by the switch 4b is sent to the transmitting side for the next intermediate relay station.
一般に送信異常の検出は、送信出力低下やパルス断など
に限られ、これらの場合に警報回路5aは、切替器4a
の制御回路6aに対して切替情報としての警報を送出し
ていた。In general, detection of a transmission abnormality is limited to a decrease in transmission output or a pulse interruption, and in these cases, the alarm circuit 5a switches the switch 4a.
An alarm as switching information was sent to the control circuit 6a of the controller.
一方、受信異常の検出は、パリティチェックやフレーム
同期外れなどであり、W報回路5bは制御回路6bに対
して警報を送出し、切替器4bで受信装置3a、3bを
切り替えていた。On the other hand, reception abnormalities are detected by parity checks, frame synchronization loss, etc., and the W alarm circuit 5b sends an alarm to the control circuit 6b, and the switch 4b switches between the receiving devices 3a and 3b.
しかしながら、送信異常の検出で内容の正しい信号を送
出しているかどうかを調べるためには、警報回路に受信
装置と同様な機能を持たせなくてはならない。このため
、コスト的に大きな負担がかかることになり、現実には
行なわれていないのが普通であった。However, in order to check whether a signal with the correct content is being sent by detecting a transmission abnormality, the alarm circuit must have a function similar to that of the receiving device. This imposes a large cost burden, and it has generally not been carried out in practice.
これに比べ、受信異常の検出では受信内容が正しいもの
であるかどうかを判断するために必要な情報を得ること
ができる。In comparison, detection of a reception abnormality makes it possible to obtain information necessary to determine whether or not the received content is correct.
このように、従来のセット予備切替方式では、受信側の
切替器の切替情報に比へ、送信側の切替器の切替情報は
不十分であった。As described above, in the conventional set backup switching method, the switching information of the transmitting side switching device is insufficient compared to the switching information of the receiving side switching device.
[解決すべき問題点]
上述した従来のセット予備切替方式は、送信側において
機器障害が発生し、次の中間中継局が受信以上と判定し
た場合であっても、送信側では警報回路が働かなかった
。このため、切替器による送信装置の切替が行なわれず
、回線が救済されないという問題点があった。[Problems to be solved] In the conventional set backup switching method described above, even if a device failure occurs on the transmitting side and the next intermediate relay station determines that the reception is better than that, the alarm circuit on the transmitting side will not work. There wasn't. For this reason, there was a problem in that the transmitter was not switched by the switch and the line was not repaired.
本発明は、上記問題点にかんがみてなされたもので、中
間中継局においてホットスタンバイ方式の現用と予備の
二つの受信回路がほぼ同時に受信異常を検出した場合、
警報手段によって同時障害警報を伝送路を通じて伝送し
、送信装置の切替手段を制御する制御手段によって同時
障害警報にもとづく切り替えが行なわれるようにし、回
線を救済するセット予備切替方式の提供を目的とする。The present invention has been made in view of the above-mentioned problems.When the two receiving circuits of the hot standby system, the active and standby receiving circuits, detect a reception abnormality at almost the same time at an intermediate relay station,
The purpose of the present invention is to provide a set backup switching method for relieving a line by transmitting a simultaneous failure alarm by an alarm means through a transmission line, and by controlling means for controlling the switching means of a transmitting device to perform switching based on the simultaneous failure alarm. .
[問題点の解決手段]
上記目的を達成するため、本発明のセット予備切替方式
は、送信装置と受信装置を無線回線および伝送路を介し
て接続し、送信装置には、複数の送信手段と、この送信
手段を選択的に切り替える切替手段と、上記複数の送信
手段を監視し、障害の発生を検出すると障害警報を発す
る第1の警報手段と、障害警報にもとづいて上記切替手
段を制御する制御回路とを備え、受信装置には、受信手
段と、この受信手段を監視し、上記送信手段の障害を検
出した場合に伝送路を介して上記制御手段に対して障害
警報を発する第2の警報手段とを備えた構成としである
。[Means for Solving Problems] In order to achieve the above object, the set backup switching method of the present invention connects a transmitting device and a receiving device via a wireless line and a transmission path, and the transmitting device has a plurality of transmitting means and , a switching means for selectively switching the transmitting means; a first alarm means for monitoring the plurality of transmitting means and issuing a fault alarm when detecting the occurrence of a fault; and controlling the switching means based on the fault alarm. The receiving device includes a receiving means, and a second device that monitors the receiving means and issues a failure alarm to the control means via a transmission path when a failure of the transmitting means is detected. This configuration includes an alarm means.
[実施例コ 以下、図面にもとづいて本発明の詳細な説明する。[Example code] Hereinafter, the present invention will be explained in detail based on the drawings.
第1図は、本発明の一実施例に係るセット予備切替方式
を採用した中間中継局のブロック図である。なお、従来
例と共通または対応する部分については同一の符号で表
す。FIG. 1 is a block diagram of an intermediate relay station that employs a set protection switching method according to an embodiment of the present invention. Note that parts common to or corresponding to those of the conventional example are denoted by the same reference numerals.
同図において、7は伝送路であり、受信側の警報回路5
bと送信側の制御回路6aとを接続している。In the figure, 7 is a transmission line, and an alarm circuit 5 on the receiving side
b and the transmitting side control circuit 6a are connected.
上記構成において、第2図に示す従来の中間中継局とは
受信側の警報回路5bと送信側の制御回路6aの機能が
異なる。In the above configuration, the function of the alarm circuit 5b on the receiving side and the control circuit 6a on the transmitting side is different from that of the conventional intermediate relay station shown in FIG.
具体的には、第1図の中間中継局の受信側にある警報回
路5bは、主に二つの機能を有する。第1の機能は、従
来のものと同様に現用の受信異常を監視し、受信装置4
a、4bを切り替えるための警報を制御回路6bへ送出
するものである。そして、第2の機能は、現用と予備の
受信異常をともに監視し、同時に障害が発生したときに
送信側の中継局に伝送路7を通じて同時障害の警報を送
出する機能である。Specifically, the alarm circuit 5b on the receiving side of the intermediate relay station in FIG. 1 mainly has two functions. The first function is to monitor current reception abnormalities and
This is to send an alarm for switching between a and 4b to the control circuit 6b. The second function is to monitor both the active and standby reception abnormalities and, when failures occur at the same time, to send out a warning of simultaneous failures to the transmitting relay station via the transmission path 7.
一方、第1図の中継局の送信側にある制御回路6aも、
これに対応して二つの機能を有する。On the other hand, the control circuit 6a on the transmitting side of the relay station in FIG.
It has two functions corresponding to this.
第1の機能は、従来例の制御回路のように現用の送信異
常によって警報回路5aから出される警報で送信装置2
a、2bを切り替える機能である。The first function is to issue an alarm from the alarm circuit 5a in response to an abnormality in the transmitting device 2, as in the conventional control circuit.
This is a function to switch between a and 2b.
また、第2の機能として、次の中間中継局から伝送路7
を通じて送られてくる同時障害警報によって送信装置2
a、2bを切り替える機能である。In addition, as a second function, transmission line 7 from the next intermediate relay station
The simultaneous fault alarm sent through the transmitting device 2
This is a function to switch between a and 2b.
このように、本実施例では、受信側で検出された受信異
常を同時障害のときのみ警報として送信側の中継局へフ
ィードバックし、セット、予イ一方式17′I逆イ雷詰
署かtni材士不ため−中■巾銖耶の送信側にその送信
内容が正しいかどうかを判定する回路を付けることなく
送信装置の機器障害による回線の救済不能、を防ぐこと
ができる。In this way, in this embodiment, a reception abnormality detected on the receiving side is fed back as an alarm to the relay station on the transmitting side only when there are simultaneous failures. It is possible to prevent the line from being unable to be repaired due to a device failure in the transmitting device without adding a circuit to the transmitting side of Koya to determine whether the transmitted content is correct.
なお、本発明は上記実施例に限定されるものでなく、要
旨の範囲内における種々変形例を含むものである。例え
ば、伝送路−は、伝送すべき情報量が少ないため、特に
設けた伝送路に限られず、電話回線などを利用すること
ができる。It should be noted that the present invention is not limited to the above embodiments, but includes various modifications within the scope of the gist. For example, since the amount of information to be transmitted is small, the transmission path is not limited to a specially provided transmission path, and a telephone line or the like can be used.
[発明の効果コ
以上説明したように本発明は、受信装置内の警報手段の
情報を利用して送信手段の機器障害を検出し、セット予
備切替を行なっているため、簡単な構成により回線の救
済を可能とすることができるという効果がある。[Effects of the Invention] As explained above, the present invention utilizes the information of the alarm means in the receiving device to detect a device failure in the transmitting means and performs set backup switching. This has the effect of making relief possible.
第1図は本発明の一実施例に係るセット予備切替方式を
採用した中間中継局のブロック図、第2図は従来のセッ
ト予備切替方式を採用した中間中継局のブロック図、第
3図はデジタル無線伝送システムの全体図である。
la、lb:ハイブリッド
2a、2b:送信装置(現用および予備)3a、3b:
受信装置(現用および予備)4a、4b:切替器
5a、5b:警報回路
6a、6b:制御回路
7:同時障害警報の伝送路FIG. 1 is a block diagram of an intermediate relay station that uses a set protection switching method according to an embodiment of the present invention, FIG. 2 is a block diagram of an intermediate relay station that uses a conventional set protection switching method, and FIG. 3 is a block diagram of an intermediate relay station that uses a conventional set protection switching method. 1 is an overall diagram of a digital wireless transmission system. la, lb: Hybrid 2a, 2b: Transmitting device (current and backup) 3a, 3b:
Receiving devices (active and spare) 4a, 4b: Switching devices 5a, 5b: Alarm circuits 6a, 6b: Control circuit 7: Simultaneous failure alarm transmission line
Claims (2)
して接続し、送信装置には、複数の送信手段と、この送
信手段を選択的に切り替える切替手段と、上記複数の送
信手段を監視し、障害の発生を検出すると障害警報を発
する第1の警報手段と、障害警報にもとづいて上記切替
手段を制御する制御回路を具備し、受信装置には、受信
手段と、この受信手段を監視し、上記送信手段の障害を
検出した場合に伝送路を介して上記制御手段に対して障
害警報を発する第2の警報手段を具備し、障害発生時に
正常な送信手段を選択することを特徴とするセット予備
切替方式。(1) A transmitting device and a receiving device are connected via a wireless line and a transmission path, and the transmitting device includes a plurality of transmitting means, a switching means for selectively switching between the transmitting means, and a monitoring device for monitoring the plurality of transmitting means. The receiving device includes a first alarm means that issues a fault alarm when the occurrence of a fault is detected, and a control circuit that controls the switching means based on the fault alarm. and a second alarm means that issues a failure alarm to the control means via a transmission line when a failure of the transmission means is detected, and a normal transmission means is selected when a failure occurs. Set reserve switching method.
路を選択的に切り替える切替回路と、この切替回路を制
御する制御回路を有し、前記第2の警報手段が、上記複
数の受信回路を監視し、複数の受信回路で受信異常が生
じた場合に、前記送信手段の障害とみなして障害警報を
発するものである特許請求の範囲第1項記載のセット予
備切替方式。(2) The receiving means includes a plurality of receiving circuits, a switching circuit that selectively switches between the receiving circuits, and a control circuit that controls the switching circuit, and the second alarm means includes a plurality of receiving circuits, a switching circuit that selectively switches the receiving circuits, and a control circuit that controls the switching circuits. 2. The set backup switching system according to claim 1, wherein circuits are monitored, and if a reception abnormality occurs in a plurality of receiving circuits, it is assumed that there is a failure in the transmitting means and a failure alarm is issued.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10195487A JPS63268318A (en) | 1987-04-27 | 1987-04-27 | Standby set changeover system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10195487A JPS63268318A (en) | 1987-04-27 | 1987-04-27 | Standby set changeover system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63268318A true JPS63268318A (en) | 1988-11-07 |
Family
ID=14314276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10195487A Pending JPS63268318A (en) | 1987-04-27 | 1987-04-27 | Standby set changeover system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63268318A (en) |
-
1987
- 1987-04-27 JP JP10195487A patent/JPS63268318A/en active Pending
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