JPH07321711A - Line changeover system in radio communication system - Google Patents
Line changeover system in radio communication systemInfo
- Publication number
- JPH07321711A JPH07321711A JP13392894A JP13392894A JPH07321711A JP H07321711 A JPH07321711 A JP H07321711A JP 13392894 A JP13392894 A JP 13392894A JP 13392894 A JP13392894 A JP 13392894A JP H07321711 A JPH07321711 A JP H07321711A
- Authority
- JP
- Japan
- Prior art keywords
- line
- working
- protection
- delay
- delay time
- 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
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明はデジタル無線通信方式に
おいて現用/予備回線を切り替える回線切替方式に関
し、特に遅延時間が異なるN種類の伝送方式の間で無瞬
断での切り替えを可能にした回線切替方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line switching system for switching between a working line and a protection line in a digital wireless communication system, and in particular, a line capable of switching without interruption between N types of transmission systems having different delay times. Regarding switching method.
【0002】[0002]
【従来の技術】現用/予備回線による回線切替方式は、
種々の文献によって知られているところである。例え
ば、「マイクロ波通信」桑原守二著、電気通信協会、P
152〜156、回線自動切替方式、がある。また、現
用から予備回線に切り替える際の信号の欠落等を防止す
るために、現用/予備回線を無瞬断で切り替える技術と
して、例えば特開昭56−153863号公報に記載さ
れたものがある。2. Description of the Related Art The line switching system by working / standby line is
It is known by various documents. For example, “Microwave Communications” by Moruji Kuwahara, The Telecommunications Association, P.
There are 152 to 156 and a line automatic switching system. Further, as a technique for switching the working / protection line without interruption in order to prevent a signal loss when switching from the working line to the protection line, for example, there is a technique described in Japanese Patent Laid-Open No. 56-153863.
【0003】従来のこの種の回線切替方式の一例を図3
のブロック構成図に示す。この例は、第1の現用回線1
0と第2の現用回線20をそれぞれ予備回線50,60
に切替可能に構成した例である。第1の現用回線10
は、第1変調器11と第1送信機12を含む送信系と、
第1受信機13と第1復調器14を含む受信系で構成さ
れており、第1の現用信号は第1送端切替器15を通
り、第1変調器11、第1送信機12、第1受信機1
3、第1復調器14を経て再生され、第1無瞬断切替器
16を通り第1の現用信号出力として後段の搬端機器等
へ与えられる。また、この第1の現用回線10には、第
1の予備回線50が設けられており、第1現用回線10
と同じ規格の第1変調器51、第1送信機52、第1受
信機53、第1復調器54で構成され、前記第1送端切
替器15と第1無瞬断切替器16により第1現用回線1
0に並列接続されている。An example of a conventional line switching system of this type is shown in FIG.
Is shown in the block diagram. In this example, the first working line 1
0 and the second working line 20 are replaced by protection lines 50 and 60, respectively.
This is an example of a switchable configuration. First working line 10
Is a transmission system including a first modulator 11 and a first transmitter 12, and
The reception system includes a first receiver 13 and a first demodulator 14, and the first working signal passes through a first transmission end switcher 15, a first modulator 11, a first transmitter 12, and a first transmitter 12. 1 receiver 1
3. The signal is regenerated through the first demodulator 14 and passed through the first non-interruption switching device 16 to be provided as a first working signal output to the carrier-end device in the subsequent stage. Further, the first working line 10 is provided with a first protection line 50.
The first modulator 51, the first transmitter 52, the first receiver 53, and the first demodulator 54 of the same standard as 1 working line 1
0 connected in parallel.
【0004】第2の現用回線20も伝送方式が相違する
点を除けば同様な構成であり、第2変調器21、第2送
信機22、第2受信機23、第2復調器24を備え、第
2の現用信号は第2送端切替器25を通った後、これら
を経て再生され、第2無瞬断切替器26を通り第2の現
用信号出力とされる。また、この第2の現用回線20に
対しても、第2の現用回線20と同様な規格で構成され
た第2の予備回線60Iが第2の送端切替器25と第2
の無瞬断切替器26により第2現用回線20に並列接続
されている。The second working line 20 has the same configuration except that the transmission system is different, and includes a second modulator 21, a second transmitter 22, a second receiver 23, and a second demodulator 24. , The second working signal passes through the second sending end switching device 25, is then reproduced through them, and passes through the second hitless switching device 26 to be output as the second working signal. Also for this second working line 20, a second backup line 60I configured according to the same standard as the second working line 20 is provided with a second sending end switch 25 and a second
It is connected in parallel to the second working line 20 by the hitless switch 26.
【0005】ここで、前記第1及び第2の現用回線1
0,20及び予備回線50,60はそれぞれ異なる周波
数帯域が使用される。また、前記第1の現用回線10及
び予備回線50の伝送方式と、第2の現用回線20及び
予備回線60の伝送方式とは相違しており、したがって
各回線において信号を伝送する際に生じる遅延時間が第
1及び第2の現用回線10,20の相互間で相違してい
る。Here, the first and second working lines 1
Different frequency bands are used for 0, 20 and protection lines 50, 60, respectively. Further, the transmission method of the first working line 10 and the protection line 50 is different from the transmission method of the second working line 20 and the protection line 60. Therefore, the delay caused when the signal is transmitted in each line. The time is different between the first and second working lines 10 and 20.
【0006】また、前記第1及び第2の予備回線50,
60にはそれぞれ予備回線の品質を監視するために用い
られる第1及び第2のパイロット信号発生器101,1
03とパイロット信号検出器102,104が接続され
る。そして、前記第1及び第2の現用回線10,20及
び予備回線50,60は回線監視装置100により各回
線における品質が監視され、その監視結果に基づいて前
記送端切替器15,25と無瞬断切替器16,26が制
御される。The first and second protection lines 50,
Reference numeral 60 designates first and second pilot signal generators 101, 1 used for monitoring the quality of the protection line, respectively.
03 and the pilot signal detectors 102 and 104 are connected. The quality of each of the first and second working lines 10 and 20 and the protection lines 50 and 60 is monitored by the line monitoring device 100. Based on the monitoring result, the transmission end switching devices 15 and 25 are not identified. The instantaneous interruption switching devices 16 and 26 are controlled.
【0007】この無線通信方式では、伝搬障害または機
器障害等により、例えば第1の現用回線10の回線品質
が劣化した場合には回線監視装置100がこれを検出
し、その検出結果に基づいて第1の送端切替器15及び
第1の無瞬断切替器16の接続モードが切り替えられ
る。これにより、第1の現用回線10は第1の予備回線
50へ切り替えられ、第1の現用信号は第1の現用回線
10から第1の予備回線50を通されることになる。即
ち、第1の現用信号が第1の予備回線50の第1の変調
器51、第1の送信機52、第1の受信機53、第1の
復調器54を経て再生され、第1の無瞬断切替器16よ
り出力される。そして、ここでの回線切替に際しては、
第1の現用回線10と予備回線50とは同一の伝送方式
として構成されているため、両回線間には遅延時間差が
無く、第1の無瞬断切替器16により無瞬断での切り替
えが行われる。In this wireless communication system, when the line quality of the first working line 10 is deteriorated due to a propagation failure or a device failure, the line monitoring apparatus 100 detects this, and based on the detection result, The connection mode of the first end switching device 15 and the first hitless switching device 16 is switched. As a result, the first working line 10 is switched to the first protection line 50, and the first working signal is passed from the first working line 10 to the first protection line 50. That is, the first working signal is reproduced through the first modulator 51, the first transmitter 52, the first receiver 53, and the first demodulator 54 of the first protection line 50, and the first working signal is reproduced. It is output from the hitless switching device 16. And when switching lines here,
Since the first working line 10 and the protection line 50 are configured as the same transmission system, there is no delay time difference between the two lines, and the first non-interruption switch 16 enables switching without non-interruption. Done.
【0008】第2の現用回線20の回線品質が劣化した
場合には、第2の現用回線20は第2の予備回線60に
切り替えられることになる。即ち、第2の現用信号は第
2の予備回線60の第2の変調器61、第2の送信機6
2、第2の受信機63、第2の復調器64を経て再生さ
れ、第2の無瞬断切替器26より出力される。ここでの
回線切替も第2の現用回線20と第2の予備回線60と
は同一の伝送方式であるので、第2の無瞬断切替器26
にて無瞬断で切り替えられる。When the line quality of the second working line 20 deteriorates, the second working line 20 is switched to the second protection line 60. That is, the second working signal is the second modulator 61 of the second protection line 60, the second transmitter 6
2, reproduced via the second receiver 63 and the second demodulator 64, and output from the second hitless switch 26. Since the second working line 20 and the second protection line 60 have the same transmission method as the line switching here, the second non-interruption switch 26
You can switch without interruption.
【0009】[0009]
【発明が解決しようとする課題】このような構成の無線
通信方式における回線切替方式では、伝搬障害或いは機
器障害等により現用回線の回線品質が劣化し、現用回線
と予備回線の切り替えを無瞬断で行うためには、同一の
伝送方式、即ち遅延時間が等しい現用回線と予備回線と
の間で行う必要がある。したがって、図3に示した場合
には、第1の現用回線10と第2の現用回線20とでは
伝送方式が異なるため、第1の現用回線10はこれと同
じ伝送方式の第1の予備回線50に切り替え、第2の現
用回線20はこれと同じ伝送方式の第2の予備回線60
に切り替える必要がある。In the line switching system in the wireless communication system having such a configuration, the line quality of the working line is deteriorated due to a propagation failure or equipment failure, and the switching between the working line and the protection line is interrupted without interruption. In order to do so, it is necessary to perform the same transmission method, that is, between the working line and the protection line having the same delay time. Therefore, in the case shown in FIG. 3, the transmission method is different between the first working line 10 and the second working line 20, so that the first working line 10 is the first protection line of the same transmission system. 50, and the second working line 20 is the second protection line 60 of the same transmission method as this.
Need to switch to.
【0010】このため、従来の回線切替方式では、異な
る伝送方式の現用回線毎にそれぞれと遅延時間が等しい
予備回線を備えることが必要であり、そのために前記の
例では2つの異なる予備回線50,60が必要とされ
る。このため、回線の切り替えを実行するための装置構
成規模が大きくなるとともに、予備回線の数だけ周波数
の利用効率が悪くなるという問題がある。Therefore, in the conventional line switching system, it is necessary to provide a backup line having the same delay time as each of the working lines of the different transmission systems. Therefore, in the above example, two different backup lines 50, 60 is required. For this reason, there is a problem that the device configuration scale for executing the line switching becomes large and the frequency utilization efficiency deteriorates by the number of the backup lines.
【0011】[0011]
【発明の目的】本発明の目的は、予備回線を低減すると
共に回線の切替時における無瞬断切替を可能にした回線
切替方式を提供することにある。また、本発明の他の目
的は、予備回線を低減することで装置構成規模を縮小
し、かつ周波数の利用効率を高めた回線切替方式を提供
することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a line switching system capable of reducing the number of protection lines and enabling non-instantaneous switching at the time of line switching. Another object of the present invention is to provide a line switching system in which the device configuration scale is reduced by reducing the number of backup lines and the frequency utilization efficiency is improved.
【0012】[0012]
【課題を解決するための手段】本発明の回線切替方式
は、無線通信の伝送路におけるそれぞれの遅延時間が異
なる複数の現用回線と1以上の予備回線とを有し、かつ
現用回線の一部を予備回線に切り替えるように構成され
る回線切替方式において、複数の現用回線は選択的に同
一の予備回線に切り替え可能に構成され、かつ各現用回
線と予備回線との間には選択される現用回線と予備回線
との遅延時間差に対応した遅延量を与える遅延調整回路
を備えることを特徴とする。The line switching system of the present invention has a plurality of working lines and one or more protection lines, each of which has a different delay time in a transmission line of wireless communication, and a part of the working line. In the line switching system configured to switch to a protection line, a plurality of working lines are selectively switchable to the same protection line, and a working line selected between each working line and the protection line It is characterized by comprising a delay adjusting circuit for giving a delay amount corresponding to a delay time difference between the line and the protection line.
【0013】例えば、複数の現用回線と、1つの予備回
線と、前記各現用回線の入力端に入力される信号を選択
して予備回線に切り替える送端切替器と、予備回線の出
力信号を選択された現用回線の出力端に切り替える無瞬
断切替器と、予備回線と選択された現用回線の間に介挿
される遅延調整回路とを備え、予備回線に切り替えられ
た現用回線における遅延時間と、予備回線における遅延
時間との遅延時間差を遅延調整回路により調整するよう
に構成する。また、複数の現用回線と1つ以上の予備回
線のそれぞれにおける回線品質を監視する回線監視装置
を有し、この回線監視装置により前記送端切替器と無瞬
断切替器を制御し、選択された現用回線を予備回線に切
り替える動作を行わせるように構成される。For example, a plurality of working lines, one protection line, a transmission end switch for selecting a signal input to the input end of each working line to switch to the protection line, and selecting an output signal of the protection line A non-interruption switching device that switches to the output end of the working line that has been selected, and a delay adjustment circuit that is inserted between the protection line and the selected working line, and the delay time in the working line that has been switched to the protection line, The delay adjustment circuit adjusts the delay time difference from the delay time in the protection line. Further, it has a line monitoring device for monitoring the line quality in each of a plurality of working lines and one or more protection lines, and the line monitoring device controls the sending end switch and the non-interruption switch and is selected. The working line is switched to the protection line.
【0014】[0014]
【作用】複数の現用回線のいずれかを選択して予備回線
に切り替えた際に、選択された現用回線における遅延時
間と、予備回線における遅延時間との遅延時間差により
無瞬断切替が不可能となるため、この遅延時間差を遅延
調整回路において調整し、両回線における遅延時間差を
無くすことで、切替に際しての無瞬断を可能とする。When any one of a plurality of working lines is selected and switched to the protection line, it is impossible to switch without interruption due to the delay time difference between the delay time of the selected working line and the delay time of the protection line. Therefore, by adjusting this delay time difference in the delay adjusting circuit and eliminating the delay time difference in both lines, it is possible to achieve no interruption during switching.
【0015】[0015]
【実施例】次に、本発明の実施例を図面を参照して説明
する。図1は本発明の回線切替方式を適用した無線通信
方式の一例のブロック構成図である。この例は、N種
(N=2)の異なる伝送方式の第1の現用回線10と第
2の現用回線20をそれぞれ同一の予備回線50に切替
可能に構成した例である。第1の現用回線10は、第1
変調器11と第1送信機12を含む送信系と、第1受信
機13と第1復調器14を含む受信系で構成されてお
り、第1の現用信号は第1送端切替器15を通り、第1
変調器11、第1送信機12、第1受信機13、第1復
調器14を経て再生され、第1無瞬断切替器16を通り
第1の現用信号出力として後段の搬端機器等へ与えられ
る。Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing an example of a wireless communication system to which the line switching system of the present invention is applied. In this example, the first working line 10 and the second working line 20 of N types (N = 2) of different transmission systems can be switched to the same protection line 50. The first working line 10 is the first
It is composed of a transmission system including the modulator 11 and the first transmitter 12, and a reception system including the first receiver 13 and the first demodulator 14, and the first working signal is generated by the first transmission end switcher 15. Street, first
Reproduced through the modulator 11, the first transmitter 12, the first receiver 13, and the first demodulator 14, and passes through the first no-stop switcher 16 to be output as the first working signal to the downstream end equipment or the like. Given.
【0016】第2の現用回線20は、第2変調器21と
第2送信機22を含む送信系と、第2受信機23と第2
復調器24を含む受信系とで構成されており、第2の現
用信号は第2送端切替器25を通った後、第2変調器2
1、第2送信機22、第2受信機23、第2復調器24
を経て再生され、第2無瞬断切替器26を通り第2の現
用信号出力とされる。The second working line 20 includes a transmission system including a second modulator 21 and a second transmitter 22, a second receiver 23 and a second transmission line.
And a receiving system including a demodulator 24. The second working signal passes through the second sending end switch 25, and then the second modulator 2
1, second transmitter 22, second receiver 23, second demodulator 24
And is reproduced through the second non-instantaneous-interruption switch 26 to be the second working signal output.
【0017】また、これら第1及び第2の現用回線1
0,20に対して、ここでは前記第1の現用回線と同じ
伝送方式として、変調器51と送信機52を含む送信系
と、受信機53と復調器54を含む受信系とで構成され
た予備回線50が前記第1の現用回線10に設けられて
いる第1の送端切替器15と第1の無瞬断切替器16に
より第1現用回線10に並列接続されている。Also, these first and second working lines 1
In contrast to 0 and 20, here, the transmission system including the modulator 51 and the transmitter 52 and the receiving system including the receiver 53 and the demodulator 54 are used as the same transmission system as the first working line. A backup line 50 is connected in parallel to the first working line 10 by a first sending end switch 15 and a first non-interrupting switch 16 provided in the first working line 10.
【0018】ここで、前記第1及び第2の現用回線1
0,20と予備回線50はそれぞれ異なる周波数帯域が
使用される。また、第1の現用回線10と予備回線50
における伝送方式は、第2の現用回線20における伝送
方式に比較してその遅延時間が長くなるように設定され
ている。そして、第2の送端切替器25と第1の送端切
替器15との間は直結されているが、第2の無瞬断切替
器26と第1の無瞬断切替器16との間には遅延調整回
路27が介挿されており、この遅延調整回路27の遅延
量は前記第1の現用回線10における伝送方式の遅延時
間と、第2の現用回線20における伝送方式の遅延時間
との遅延時間差に等しく設定されている。この遅延調整
回路27としては、公知の各種の遅延回路が用いられ、
予め手操作等により遅延量が設定されている。Here, the first and second working lines 1
0, 20 and the protection line 50 use different frequency bands. In addition, the first working line 10 and the protection line 50
The transmission method in is set so that its delay time is longer than that of the transmission method in the second working line 20. Although the second sending end switching device 25 and the first sending end switching device 15 are directly connected, the second uninterruptible switching device 26 and the first uninterruptible switching device 16 are connected to each other. A delay adjustment circuit 27 is interposed between the delay adjustment circuits 27. The delay amount of the delay adjustment circuit 27 is the delay time of the transmission method in the first working line 10 and the delay time of the transmission method in the second working line 20. Is set equal to the delay time difference between and. As the delay adjustment circuit 27, various known delay circuits are used,
The delay amount is preset by manual operation or the like.
【0019】また、前記予備回線50には第2及び第1
の送端切替器25,15を介して予備回線の品質を監視
するために用いられるパイロット信号発生器101が接
続され、また第2の無瞬断切替器26と遅延調整回路2
7と第1の無瞬断切替器16を介してパイロット信号検
出器102が接続される。そして、前記第1及び第2の
現用回線10,20と予備回線50は回線監視装置10
0により各回線における品質が監視され、その監視結果
に基づいて前記送端切替器15,25と無瞬断切替器1
6,26が制御される。The backup line 50 has a second and a first line.
The pilot signal generator 101 used for monitoring the quality of the protection line is connected via the transmission end switches 25 and 15 of the second transmission switch 26, and the second non-interruption switch 26 and the delay adjustment circuit 2 are connected.
The pilot signal detector 102 is connected via 7 and the first hitless switching device 16. The first and second working lines 10 and 20 and the protection line 50 are connected to the line monitoring device 10.
The quality of each line is monitored by 0, and the sending end switches 15 and 25 and the no-interruption switch 1 are monitored based on the monitoring result.
6, 26 are controlled.
【0020】この構成によれば、伝搬障害または機器障
害等により、例えば第1の現用回線10の回線品質が劣
化した場合には回線監視装置100がこれを検出し、そ
の検出結果に基づいて第1の送端切替器15及び第1の
無瞬断切替器16の接続モードが切り替えられる。これ
により、第1の現用回線10は予備回線50へ切り替え
られ、第1の現用信号は第1の現用回線10から予備回
線50を通されることになる。即ち、第1の現用信号が
予備回線50の変調器51、送信機52、受信機53、
復調器54を経て再生され、第1の無瞬断切替器16よ
り出力される。そして、ここでの回線切替に際しては、
第1の現用回線10と予備回線30とは同一の伝送方式
として構成されているため、両回線間には遅延時間差が
無く、第1の無瞬断切替器16により無瞬断での切り替
えが行われる。According to this configuration, when the line quality of the first working line 10 is deteriorated due to a propagation failure or a device failure, the line monitoring apparatus 100 detects the deterioration, and based on the detection result, The connection mode of the first end switching device 15 and the first hitless switching device 16 is switched. As a result, the first working line 10 is switched to the protection line 50, and the first working signal is passed from the first working line 10 to the protection line 50. That is, the first working signal is the modulator 51, the transmitter 52, the receiver 53 of the protection line 50,
It is reproduced through the demodulator 54 and output from the first hitless switching device 16. And when switching lines here,
Since the first working line 10 and the protection line 30 are configured as the same transmission method, there is no delay time difference between the two lines, and the first non-interruption switch 16 enables switching without non-interruption. Done.
【0021】一方、第2の現用回線20の回線品質が劣
化した場合には、第2の送端切替器25により第2の現
用回線20が予備回線50に切り替えられる。第2の現
用信号は予備回線50の変調器51、送信機52、受信
機53、復調器54を経て再生される。そして、遅延調
整回路27を通った後、第2の無瞬断切替器26より出
力される。ここでの回線切替に際しては、第2の現用回
線20と予備回線50とは異なる伝送方式であるので、
予備回線50において再生された信号は当然第2の現用
回線20において再生された信号とその遅延量が異なっ
ている。しかしながら、この異なる遅延量の信号は遅延
調整回路27を通され、ここでその遅延量が第2の現用
回線20と等しくなるように調整されるため、第2の無
瞬断切替器26に到達される際には遅延量は等しくな
る。これにより、第2の無瞬断切替器26において無瞬
断での切り替えが行われる。On the other hand, when the line quality of the second working line 20 is deteriorated, the second working line switching unit 25 switches the second working line 20 to the protection line 50. The second working signal is reproduced through the modulator 51, the transmitter 52, the receiver 53, and the demodulator 54 of the protection line 50. Then, after passing through the delay adjusting circuit 27, it is output from the second non-instantaneous interruption switch 26. Since the second working line 20 and the protection line 50 have different transmission methods at the time of line switching here,
The signal reproduced on the protection line 50 naturally differs from the signal reproduced on the second working line 20 in the amount of delay. However, the signals having the different delay amounts are passed through the delay adjusting circuit 27, where the delay amount is adjusted so as to be equal to that of the second working line 20, so that the signals reach the second hitless switch 26. The delay amounts become the same when they are performed. As a result, the second hitless switch 26 is switched without hitting.
【0022】したがって、この回線切替方式では、2つ
の遅延時間が異なる現用回線を切り替えるための予備回
線が1つで済み、かついずれの現用回線を切り替える場
合でも無瞬断切替が可能とされる。このため、従来構成
に比較して予備回線を低減した分だけ回線切替方式の装
置構成規模を縮小することができ、かつ予備回線に割り
当てる周波数を低減して周波数の有効利用を図ることが
可能となる。Therefore, in this line switching method, only one protection line is required for switching the two working lines having different delay times, and no matter which working line is switched, non-instantaneous switching is possible. Therefore, it is possible to reduce the device configuration scale of the line switching system by the amount of the reduction of the protection line as compared with the conventional configuration, and it is possible to reduce the frequency assigned to the protection line and to effectively use the frequency. Become.
【0023】図2は本発明の第2実施例のブロック構成
図であり、ここではN=4の異なる伝送方式の現用回線
の例を示している。第1の現用回線10から第4の現用
回線40のそれぞれの構成は第1実施例の各現用回線と
同じ構成であり、ここでは図示を省略している。但し、
ここでは第1から第4の各現用回線における伝送方式は
相違しており、それぞれ遅延時間が相違している。ま
た、予備回線50も第1実施例の予備回線と同じ構成で
あり、第1の現用回線10と同じ伝送方式となってい
る。FIG. 2 is a block diagram of the second embodiment of the present invention, in which an example of working lines of different transmission systems with N = 4 is shown. The respective configurations of the first working line 10 to the fourth working line 40 are the same as the respective working lines of the first embodiment, and are not shown here. However,
Here, the transmission systems in the first to fourth working lines are different, and the delay times are different. The protection line 50 also has the same configuration as the protection line of the first embodiment, and has the same transmission method as the first working line 10.
【0024】そして、前記第1の現用回線10、第2の
現用回線10及び予備回線50は第1実施例と同じ構成
であり、これに第3の現用回線30と第4の現用回線4
0をそれぞれ第3の送端切替器35と第3の無瞬断切替
器36、及び第4の送端切替器45と第4の無瞬断切替
器46を介して前記予備回線50に接続している。ま
た、第3の無瞬断切替器36と第1の無瞬断切替器16
との間には第2の遅延調整回路37が介挿され、第4の
無瞬断切替器46と第1の無瞬断切替器16との間には
第3の遅延調整回路47が介挿されている。ここで、第
2の遅延調整回路37は第1の現用回線10と第3の現
用回線30との間の遅延時間差に対応する遅延量を与え
るように構成され、第3の遅延調整回路37は第1の現
用回線10と第4の現用回線40との間の遅延時間差に
対応する遅延量を与えるように構成される。The first working line 10, the second working line 10 and the protection line 50 have the same structure as in the first embodiment, and the third working line 30 and the fourth working line 4 are added to this.
0 is connected to the backup line 50 through the third sending end switch 35 and the third non-interruption switch 36, and the fourth sending end switch 45 and the fourth non-interruption switch 46, respectively. is doing. In addition, the third non-stop switch 36 and the first non-stop switch 16
A second delay adjustment circuit 37 is interposed between the first and second non-interruption switching devices 46 and 16 and a third delay adjustment circuit 47 is interposed between the second non-interruption switching device 46 and the first non-interruption switching device 16. Has been inserted. Here, the second delay adjusting circuit 37 is configured to give a delay amount corresponding to the delay time difference between the first working line 10 and the third working line 30, and the third delay adjusting circuit 37 It is configured to provide a delay amount corresponding to the delay time difference between the first working line 10 and the fourth working line 40.
【0025】したがって、この構成では、第1の現用回
線10を予備回線50に切り替える場合には、両者は同
じ伝送方式で遅延時間差が存在しないため、無瞬断での
切り替えが可能となる。また、第2の現用回線20を予
備回線50に切り替える場合には、遅延調整回路27に
おいて予備回線50との間の遅延時間差が調整されるた
め、無瞬断での回線の切り替えが可能となる。同様に、
第3の現用回線30を予備回線50に切り替える場合に
は第2の遅延調整回路37において予備回線50との間
の遅延時間差が調整され、第4の現用回線40を予備回
線50に切り替える場合には第3の遅延調整回路47に
おいて予備回線50との間の遅延時間差が調整されるた
め、それぞれ無瞬断にて回線の切り替えが可能となる。Therefore, with this configuration, when the first working line 10 is switched to the protection line 50, there is no delay time difference between the two in the same transmission system, and therefore switching can be performed without interruption. Further, when the second working line 20 is switched to the backup line 50, the delay time difference between the second working line 20 and the backup line 50 is adjusted in the delay adjusting circuit 27, so that the line can be switched without interruption. . Similarly,
When switching the third working line 30 to the protection line 50, the delay time difference between the third working line 30 and the protection line 50 is adjusted in the second delay adjustment circuit 37, and when switching the fourth working line 40 to the protection line 50. The third delay adjusting circuit 47 adjusts the delay time difference between the third delay adjusting circuit 47 and the backup line 50, so that the lines can be switched without interruption.
【0026】ここで、前記各実施例においては、遅延調
整回路27,37,47は各回線間での遅延時間差に応
じて予め固定的に設定した例を示しているが、可変遅延
調整回路として構成しておき、各回線における信号から
タイミング信号を得て各回線間の遅延時間差を測定し、
この測定結果に基づいて可変遅延調整回路における遅延
量を制御するように構成してもよい。この場合には、可
変遅延調整回路は予備回線につながる線路に1個だけ設
け、予備回線に切り替えられる回線と予備回線との遅延
時間差に応じてこの可変遅延調整回路の遅延量を制御す
れば、遅延時間が異なる複数の現用回線の数に限られる
ことなく1個の遅延調整回路で構成することができる。In each of the above embodiments, the delay adjusting circuits 27, 37, 47 are fixedly set in advance in accordance with the delay time difference between the lines. Configured, obtain the timing signal from the signal on each line, measure the delay time difference between each line,
The delay amount in the variable delay adjustment circuit may be controlled based on the measurement result. In this case, only one variable delay adjustment circuit is provided on the line connected to the protection line, and if the delay amount of the variable delay adjustment circuit is controlled according to the delay time difference between the line switched to the protection line and the protection line, The delay adjustment circuit is not limited to the number of a plurality of working lines having different delay times and can be configured by one delay adjusting circuit.
【0027】また、理論的には遅延調整回路は、現用回
線と予備回線の入力端側に介挿することも可能である
が、実際には伝送路の出力端側において遅延調整を行う
前記実施例の構成が取られることになる。Further, theoretically, the delay adjusting circuit can be inserted at the input end side of the working line and the protection line, but in practice, the delay adjusting circuit is made at the output end side of the transmission line. An example configuration will be taken.
【0028】[0028]
【発明の効果】以上説明したように本発明は、複数の現
用回線は選択的に同一の予備回線に切り替え可能に構成
され、かつ各現用回線と予備回線との間には選択される
現用回線と予備回線との遅延時間差に対応した遅延量を
与える遅延調整回路を備えているので、現用回線のいず
れかを選択して予備回線に切り替えた際に、選択された
現用回線における遅延時間と、予備回線における遅延時
間との遅延時間差を遅延調整回路において調整し、両回
線における遅延時間差を無くすことで、切替に際しての
無瞬断を可能とする。As described above, according to the present invention, a plurality of working lines are selectively switchable to the same protection line, and a working line selected between each working line and the protection line. Since it is equipped with a delay adjustment circuit that gives a delay amount corresponding to the delay time difference between the protection line and the protection line, when selecting one of the working lines and switching to the protection line, the delay time in the selected working line, By adjusting the delay time difference from the delay time in the protection line in the delay adjustment circuit and eliminating the delay time difference in both lines, no interruption during switching is possible.
【0029】したがって、遅延時間が異なる現用回線を
切り替えるための予備回線が1つで済み、従来構成に比
較して予備回線を低減した分だけ回線切替方式の装置構
成規模を縮小することができ、かつ予備回線に割り当て
る周波数を低減して周波数の有効利用を図ることが可能
となる。特に、3以上の現用回線に対して1つの予備回
線を設けた場合でも、各現用回線を無瞬断で予備回線に
切り替えることが可能となり、予備回線を大幅に削減で
き、装置構成規模の大幅な縮小と周波数の顕著な有効利
用を図ることができる。Therefore, only one protection line is required to switch the working lines having different delay times, and the number of protection lines can be reduced as compared with the conventional configuration, and the device configuration scale of the line switching system can be reduced. In addition, it is possible to reduce the frequency assigned to the protection line and to effectively use the frequency. In particular, even if one protection line is provided for three or more working lines, each working line can be switched to the protection line without interruption, and the number of protection lines can be significantly reduced, resulting in a large device configuration scale. It is possible to achieve effective reduction and effective use of frequency.
【0030】また、現用回線と予備回線のそれぞれにお
ける回線品質を監視する回線監視装置を設け、この回線
監視装置により現用回線と予備回線の切替動作行わせる
構成とした場合にも、その切替を無瞬断で行うことが可
能となる。Further, even when a line monitoring device for monitoring the line quality of each of the working line and the protection line is provided and the switching operation of the working line and the protection line is performed by this line monitoring device, the switching is not performed. It is possible to do it in a momentary interruption.
【図1】本発明の回線切替方式の第1実施例のブロック
構成図である。FIG. 1 is a block configuration diagram of a first embodiment of a line switching system of the present invention.
【図2】本発明の第2実施例のブロック構成図である。FIG. 2 is a block diagram of a second embodiment of the present invention.
【図3】従来提案されている回線切替方式の一例のブロ
ック構成図である。FIG. 3 is a block diagram showing an example of a conventionally proposed line switching system.
10 第1の現用回線 20 第2の現用回線 30 第3の現用回線 40 第4の現用回線 50 予備回線 15,25,35,45 送端切替器 16,26,36,46 無瞬断切替器 27,37,47 遅延調整回路 10 First Working Line 20 Second Working Line 30 Third Working Line 40 Fourth Working Line 50 Backup Line 15, 25, 35, 45 Sending End Switch 16, 26, 36, 46 Continuous Switching 27, 37, 47 Delay adjustment circuit
Claims (5)
延時間が異なる複数の現用回線と1以上の予備回線とを
有し、前記現用回線の一部を予備回線に切り替えるよう
に構成される回線切替方式において、前記複数の現用回
線は選択的に同一の予備回線に切り替え可能に構成さ
れ、かつ各現用回線と前記予備回線との間には選択され
る現用回線と予備回線との遅延時間差に対応した遅延量
を与える遅延調整回路を備えることを特徴とする無線通
信方式における回線切替方式。1. A line switch having a plurality of working lines and one or more protection lines each having a different delay time in a transmission line of wireless communication, and configured to switch a part of the working lines to the protection line. In the system, the plurality of working lines are selectively switchable to the same protection line, and a delay time difference between the working line and the protection line selected between each working line and the protection line is supported. A line switching system in a wireless communication system, characterized by comprising a delay adjusting circuit for giving the amount of delay.
前記各現用回線の入力端に入力される信号を選択して前
記予備回線に切り替える送端切替器と、前記予備回線の
出力信号を前記選択された現用回線の出力端に切り替え
る無瞬断切替器と、前記予備回線と選択された現用回線
の間に介挿される遅延調整回路とを備える請求項1の無
線通信方式における回線切替方式。2. A plurality of working lines and one protection line,
A transmission end switching device that selects a signal input to the input end of each working line and switches to the protection line, and a non-interruption switching device that switches the output signal of the protection line to the output end of the selected working line And a delay adjustment circuit interposed between the protection line and the selected working line.
出力端との間にはそれぞれ無瞬断切替器が設けられ、こ
れらの無瞬断切替器と予備回線の出力端との間にはそれ
ぞれ遅延調整回路が介挿され、かつ各遅延調整回路は各
現用回線のそれぞれにおける遅延時間と予備回線におけ
る遅延時間の遅延時間差に対応した遅延量に設定されて
なる請求項2の無線通信方式における回線切替方式。3. A hitless switching device is provided between each output end of the plurality of working lines and an output end of the protection line, and between the hitless switching device and the output end of the protection line. 3. The radio communication according to claim 2, wherein a delay adjustment circuit is inserted in each of the delay adjustment circuits, and each delay adjustment circuit is set to a delay amount corresponding to a difference in delay time between the delay time in each working line and the delay time in the protection line. Line switching method in the method.
間となる伝送方式として構成され、この1つの現用回線
との間には遅延調整回路が設けられず、他の現用回線と
の間には前記1つの現用回線との遅延時間差に対応した
遅延調整回路が設けられる請求項3の無線通信方式にお
ける回線切替方式。4. The protection line is configured as a transmission system having the same delay time as that of one working line, and no delay adjustment circuit is provided between this one working line and another working line. The line switching system in the wireless communication system according to claim 3, wherein a delay adjusting circuit corresponding to a delay time difference from the one working line is provided.
それぞれにおける回線品質を監視する回線監視装置を有
し、この回線監視装置により前記送端切替器と無瞬断切
替器を制御し、選択された現用回線を予備回線に切り替
える動作を行わせる請求項1ないし4のいずれか無線通
信方式における回線切替方式。5. A line monitoring device for monitoring the line quality of each of a plurality of working lines and one or more protection lines, the line monitoring device controlling the sending end switching device and the non-interruption switching device. 5. The line switching method in the wireless communication system according to claim 1, wherein an operation of switching the selected working line to the protection line is performed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13392894A JPH07321711A (en) | 1994-05-25 | 1994-05-25 | Line changeover system in radio communication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13392894A JPH07321711A (en) | 1994-05-25 | 1994-05-25 | Line changeover system in radio communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07321711A true JPH07321711A (en) | 1995-12-08 |
Family
ID=15116361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13392894A Pending JPH07321711A (en) | 1994-05-25 | 1994-05-25 | Line changeover system in radio communication system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07321711A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6418116B1 (en) | 1999-07-08 | 2002-07-09 | Fujitsu Limited | Transmission system having an uninterrupted switchover function for a plurality of lines |
JP2006086914A (en) * | 2004-09-17 | 2006-03-30 | Meidensha Corp | Remote monitoring control system |
JP2007325165A (en) * | 2006-06-05 | 2007-12-13 | Fujitsu Ltd | Impulse radio equipment |
JP2010068526A (en) * | 2001-12-18 | 2010-03-25 | Trex Enterprises Corp | High data rate wireless communication system |
JP2016163232A (en) * | 2015-03-03 | 2016-09-05 | Kddi株式会社 | Radio base station device, baseband unit, and base station system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04160927A (en) * | 1990-10-25 | 1992-06-04 | Nec Corp | Radio digital transmission system |
JPH04319821A (en) * | 1991-04-19 | 1992-11-10 | Nec Corp | Radio digital transmission system |
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1994
- 1994-05-25 JP JP13392894A patent/JPH07321711A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH04160927A (en) * | 1990-10-25 | 1992-06-04 | Nec Corp | Radio digital transmission system |
JPH04319821A (en) * | 1991-04-19 | 1992-11-10 | Nec Corp | Radio digital transmission system |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6418116B1 (en) | 1999-07-08 | 2002-07-09 | Fujitsu Limited | Transmission system having an uninterrupted switchover function for a plurality of lines |
JP2010068526A (en) * | 2001-12-18 | 2010-03-25 | Trex Enterprises Corp | High data rate wireless communication system |
JP2006086914A (en) * | 2004-09-17 | 2006-03-30 | Meidensha Corp | Remote monitoring control system |
JP4506370B2 (en) * | 2004-09-17 | 2010-07-21 | 株式会社明電舎 | Remote monitoring control system |
JP2007325165A (en) * | 2006-06-05 | 2007-12-13 | Fujitsu Ltd | Impulse radio equipment |
JP4695021B2 (en) * | 2006-06-05 | 2011-06-08 | 富士通株式会社 | Impulse radio equipment |
JP2016163232A (en) * | 2015-03-03 | 2016-09-05 | Kddi株式会社 | Radio base station device, baseband unit, and base station system |
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