JPH029490B2 - - Google Patents
Info
- Publication number
- JPH029490B2 JPH029490B2 JP17999683A JP17999683A JPH029490B2 JP H029490 B2 JPH029490 B2 JP H029490B2 JP 17999683 A JP17999683 A JP 17999683A JP 17999683 A JP17999683 A JP 17999683A JP H029490 B2 JPH029490 B2 JP H029490B2
- Authority
- JP
- Japan
- Prior art keywords
- synchronization signal
- signal
- station
- radio
- output
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
本発明は、時分割多重方式を用い、かつ複数の
中継を行う無線中継装置に関する。特に、無線中
継装置内に実装される二重化された信号受信機の
現用から予備への切替え方式に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a wireless relay device that uses a time division multiplexing method and performs multiple relays. In particular, the present invention relates to a method for switching from active use to standby for a duplex signal receiver installed in a wireless relay device.
第１図は本発明方式を適用するための無線通信
システムの一例を示すブロツク構成図である。第
２図は従来例の無線中継装置のブロツク構成図で
ある。第１図に示すように、一つの中央局Ａが子
局Ｓと通信を行うために、中継局R1〜Roが中央
局Ａと子局Ｓとの間に縦続に配置されている。さ
らに、中継局R1〜Roは第２図に示されているよ
うに、中継局R1〜Roの装置の信頼性を向上する
ために、無線機は無線機１、無線機２と無線機
４、無線機５のように二重化され、どちらか一方
が動作しない場合にも、無線機切替器６，７で選
択切替されて通信が継続できるように構成されて
いる。
FIG. 1 is a block diagram showing an example of a wireless communication system to which the method of the present invention is applied. FIG. 2 is a block diagram of a conventional wireless relay device. As shown in FIG. 1, in order for one central station A to communicate with a slave station S, relay stations R 1 to Ro are arranged in cascade between the central station A and the slave station S. Furthermore, as shown in FIG. 2, the relay stations R 1 to R o are configured to have radios such as radio 1 and radio 2 in order to improve the reliability of the equipment of the relay stations R 1 to R o . The wireless devices 4 and 5 are duplexed, and even if one of them does not operate, the wireless device switches 6 and 7 selectively switch to continue communication.
中央局Ａからは中継局R1〜Roを経て子局Ｓへ
同期信号が送出されていて、すべての中継局R1
〜Roおよび子局Ｓは、この同期信号に同期して
信号の送受信を行う。このような場合に、例え
ば、中継局Ｒ１の無線機１が不良になると、同期
信号が正常に受信できなくなることを検知して、
中継局Ｒ１は、無線機２へ無線機切替器６で切替
動作を行い、これにより、今度は無線機２から復
調された同期信号が、信号再生回路８を経て再び
下位局へ送出される。ところが、
中継局Ｒ１で同期信号が受信できなくなると、
下位局へ向けて同期信号が送出されないため、
R2〜Roにおいても、同期信号が受信できなくな
る。これにより無線機が不良ではないにのにもか
かわらず、無線機の切替動作が行われてしまう欠
点があつた。 A synchronization signal is sent from central station A to slave stations S via relay stations R 1 to R o , and all relay stations R 1
~R o and the slave station S transmit and receive signals in synchronization with this synchronization signal. In such a case, for example, if radio device 1 of relay station R1 becomes defective, it is detected that the synchronization signal cannot be received normally, and
The relay station R1 performs a switching operation to the radio device 2 using the radio device switch 6, and as a result, the synchronization signal demodulated from the radio device 2 is sent out again to the lower station via the signal reproducing circuit 8. However, when the synchronization signal can no longer be received at relay station R1,
Since synchronization signals are not sent to lower stations,
The synchronization signal cannot be received at R 2 to R o as well. As a result, there was a drawback that a switching operation was performed on the radio even though the radio was not defective.
本発明は、前記欠点を解決し、上位局からの同
期信号を受信できないときに、二重化された信号
受信手段の切替えが不良に行われることを防止す
るように構成された無線中継装置を提供すること
を目的とする。
The present invention solves the above-mentioned drawbacks and provides a wireless relay device configured to prevent duplex signal receiving means from being switched incorrectly when a synchronization signal from a higher-level station cannot be received. The purpose is to
本発明は、中継局に独立した同期信号発生手段
をもち、上位局からの同期信号を受信できないと
きは、前記同期信号発生手段により自局内で発生
した同期信号を下位局へ向けて送出することによ
り、上位局の同期信号停止に伴い下位局が不要に
切替動作を行わないように構成したことを特徴と
する。
The present invention has an independent synchronization signal generation means in the relay station, and when the synchronization signal from the upper station cannot be received, the synchronization signal generation means generates the synchronization signal within the own station and sends it out to the lower station. Accordingly, the present invention is characterized in that the lower station does not perform an unnecessary switching operation when the synchronization signal of the upper station stops.
すなわち、一つの中央局と縦続に接続された中
継局と中継局の回りに散在する子局とで構成され
る無線通信システムにおいては、中継局は、二重
化された信号受信手段をもち、中継局の信頼性を
向上させ、さらに、中央局からの同期信号に同期
して、前記中継局、子局は中央局と信号の送受を
行う。中継局においては、前記同期信号を受信で
きなくなると前記二重化された信号受信手段のう
ち一方から他方へ切替動作を行う。同時に前記同
期信号を受信できないのであるから、下位局に対
して同期信号の送出が不可能となりしたがつて下
位の全中継局も同様な切替動作を行うことになる
が、本発明では、中継局が同期信号検出手段と、
この同期信号検出手段の出力により制御され、前
記中継局からの同期信号に同期し、その同期信号
が一定期間検出されなくても、引続き同じタイミ
ングでパルスを発生するタイミング信号発生手段
と、さらに、前記同期信号検出手段と前記タイミ
ング信号発生手段とからの出力により制御される
同期信号発生手段とを備え、前記同期信号検出手
段により、前記同期信号が検出できなくなると、
前記タイミング信号発生手段により発生するパル
スにより、前記同期信号発生手段からの同期信号
が下位局へ送出されるように構成されたことを特
徴とする。 In other words, in a wireless communication system consisting of one central station, relay stations connected in cascade, and slave stations scattered around the relay station, the relay station has a redundant signal receiving means, and the relay station Furthermore, the relay stations and slave stations transmit and receive signals with the central station in synchronization with a synchronization signal from the central station. In the relay station, when the synchronization signal cannot be received, a switching operation is performed from one of the duplex signal receiving means to the other. Since the synchronization signals cannot be received at the same time, it becomes impossible to send synchronization signals to lower-order stations, and all lower-order relay stations also perform similar switching operations. However, in the present invention, the relay stations is a synchronization signal detection means,
Timing signal generation means that is controlled by the output of the synchronization signal detection means, is synchronized with the synchronization signal from the relay station, and continues to generate pulses at the same timing even if the synchronization signal is not detected for a certain period of time; a synchronizing signal generating means controlled by outputs from the synchronizing signal detecting means and the timing signal generating means, and when the synchronizing signal cannot be detected by the synchronizing signal detecting means,
The apparatus is characterized in that a synchronization signal from the synchronization signal generation means is sent to a lower station by a pulse generated by the timing signal generation means.
本発明の実施例について、図面を参照して説明
する。第３図は本発明一実施例無線中継装置のブ
ロツク構成図である。
Embodiments of the present invention will be described with reference to the drawings. FIG. 3 is a block diagram of a wireless relay device according to an embodiment of the present invention.
第３図において、空中線１１の出力は、無線機
切替器１２の共通接点に接続され、無線機切替器
１２の一方の接点は、無線機１３の入力に接続さ
れ、無線機切替器１２の他方の接点は無線機１４
の入力に接続されている。さらに、無線機１３と
無線機１４との出力は信号再生器１５に接続され
る。信号再生器１５の同期出力は、同期信号検出
器１６に接続され、同期信号検出器１６の出力
は、フリツプフロツプ１７のリセツト入力Ｓ、制
御器１８、タイミング信号発生器１９およびノツ
ト回路２０に接続される。タイミング信号発生器
１９の出力とノツト回路２０の出力とは、アンド
回路２１の入力にそれぞれ接続される。アンド回
路２１の出力はフリツプフロツプ１７のリセツト
入力Ｒに接続される。フリツプフロツプ１７の反
転出力と同期信号発生器２２の出力とは、アン
ド回路２３の入力にそれぞれ接続される。前記信
号再生器１５の他の出力とアンド回路２３の出力
とは合成されて、二重化された無線機２４に接続
され、無線機２４の出力は空中線２５に接続され
る。制御線１８の出力は、無線機切替器１２に接
続される。 In FIG. 3, the output of the antenna 11 is connected to a common contact of the radio switch 12, one contact of the radio switch 12 is connected to the input of the radio 13, and the other contact of the radio switch 12 is connected to the input of the radio 13. The contact point is radio 14
connected to the input. Further, the outputs of the radio 13 and the radio 14 are connected to a signal regenerator 15. The synchronization output of the signal regenerator 15 is connected to a synchronization signal detector 16, and the output of the synchronization signal detector 16 is connected to the reset input S of the flip-flop 17, the controller 18, the timing signal generator 19 and the note circuit 20. Ru. The output of the timing signal generator 19 and the output of the NOT circuit 20 are respectively connected to the input of an AND circuit 21. The output of the AND circuit 21 is connected to the reset input R of the flip-flop 17. The inverted output of flip-flop 17 and the output of synchronizing signal generator 22 are connected to the inputs of AND circuit 23, respectively. The other output of the signal regenerator 15 and the output of the AND circuit 23 are combined and connected to a duplexed radio 24, and the output of the radio 24 is connected to an antenna 25. The output of the control line 18 is connected to the radio switch 12.
ここで本発明の特徴とするところは、この無線
中継装置内に、独立して同期信号を発生する同期
信号発生器２２を設け、この出力を上位からの同
期信号が検出されないときに導通状態となるアン
ド回路２３を介して、下位局に送信するように構
成されたところにある。 Here, the feature of the present invention is that a synchronization signal generator 22 that independently generates a synchronization signal is provided in this wireless relay device, and this output is set to a conductive state when a synchronization signal from a host is not detected. The data is transmitted to the lower station via the AND circuit 23.
このように構成された無線中継装置の動作につ
いて説明する。第４図は本発明の無線中継装置内
の信号のタイムチヤートである。第４図に示され
る符号は第３図の×印の位置における電気信号波
形を示す。 The operation of the wireless relay device configured in this way will be explained. FIG. 4 is a time chart of signals within the wireless relay device of the present invention. The symbols shown in FIG. 4 indicate the electrical signal waveforms at the positions of the x marks in FIG. 3.
第１図において、中央局Ａからは、中継局R1
〜Roを経て子局Ｓへ周期的に同期信号を送出し
ている。第３図において、中継局Ｒでは、上位局
からの同期信号は空中線１１を経て、無線機切替
器１２により、無線機１３へ入力される。 In Figure 1, from central station A, relay station R 1
A synchronizing signal is periodically sent to the slave station S via ~ Ro . In FIG. 3, at relay station R, a synchronization signal from a higher-level station is input to radio equipment 13 via radio equipment switch 12 via antenna 11.
無線機１３で復調された同期信号は、信号再生
器１５で再生され、さらに、二重化された無線機
２４で変調された後に、空中線２５よりさらに下
位局へ送出される。 The synchronization signal demodulated by the radio device 13 is regenerated by the signal regenerator 15, further modulated by the duplex radio device 24, and then sent out via the antenna 25 to a lower station.
また、信号再生器１５からの出力は、同期信号
検出器１６で同期信号が検出され、同期信号が検
出されるとフリツプフロツプ１７をセツトすると
同時にタイミング信号発生器１９で同期信号と同
期した定期的なタイミングパルスがつくられる。 Further, the output from the signal regenerator 15 is outputted by the synchronization signal detector 16 which detects a synchronization signal. When the synchronization signal is detected, the flip-flop 17 is set and at the same time, the timing signal generator 19 generates a periodic signal synchronized with the synchronization signal. A timing pulse is created.
第４図は同期信号検出器１６の出力信号ａとタ
イミング発生器１９の出力信号ｂとの時間関係を
示している。いま、無線機１３が不良となり、同
期信号が復調されなくなると、同期信号検出器１
６の出力信号ａは、フリツプフロツプ１７へ入力
されないばかりかノツト回路２０の出力が「１」
となり、アンド回路２１の一方の入力が「１」と
なるので、タイミング発生器１９の出力信号ｂが
アンド回路２１を経て、フリツプフロツプ１７を
リセツトする。フリツプフロツプ１７の出力は
「１」となり、アンド回路２３の一方の入力が
「１」となるので、同期信号信号発生器２２から
の同期信号がアンド回路２１を経て、さらに、無
線機２４で変調され、空中線２１から下位局へ送
出される。 FIG. 4 shows the time relationship between the output signal a of the synchronization signal detector 16 and the output signal b of the timing generator 19. Now, if the radio device 13 becomes defective and the synchronization signal is no longer demodulated, the synchronization signal detector 1
Not only is the output signal a of 6 not input to the flip-flop 17, but the output of the NOT circuit 20 is "1".
Since one input of the AND circuit 21 becomes "1", the output signal b of the timing generator 19 passes through the AND circuit 21 and resets the flip-flop 17. Since the output of the flip-flop 17 becomes "1" and one input of the AND circuit 23 becomes "1", the synchronization signal from the synchronization signal generator 22 passes through the AND circuit 21 and is further modulated by the radio device 24. , is sent from the antenna 21 to the lower station.
一方、同期信号検出器１６の出力は制御器１８
へ入力しており、同期信号が検出できくなると、
制御器１８は無線機切替器１２を介して、無線機
の切替えを行い、中央局Ａからの同期信号は、無
線機１４で復調されるようになり、引続き信号再
生器１５で再生され、無線機２４で変調されて、
空中線２５を介して下位局へ同期信号が送出され
る。 On the other hand, the output of the synchronization signal detector 16 is transmitted to the controller 18.
If the synchronization signal can no longer be detected,
The controller 18 switches the radios via the radio device switch 12, and the synchronization signal from the central station A is demodulated by the radio device 14 and subsequently regenerated by the signal regenerator 15 to Modulated by machine 24,
A synchronization signal is sent to the lower station via the antenna 25.
一方、同期信号検出器１６の出力信号ａはフリ
ツプフロツプ１７をセツトするので、アンド回路
２３の一方の入力は「０」となり、同期信号発生
器２２からの信号は無線機２４へ入力されなくな
る。第４図においては、同期信号が検出されなく
なると無線機が切替わるタイミングを示してい
る。ここでは、同期信号を６回検出できなくなる
と、無線機１３から無線機１４へ切替わる。ま
た、タイミング信号発生回路１９は、同期信号が
一定期間検出されなくても引続き同じタイミング
信号ｂを発生する。 On the other hand, since the output signal a of the synchronization signal detector 16 sets the flip-flop 17, one input of the AND circuit 23 becomes "0", and the signal from the synchronization signal generator 22 is no longer input to the radio device 24. FIG. 4 shows the timing at which the radio is switched when the synchronization signal is no longer detected. Here, when the synchronization signal cannot be detected six times, the radio device 13 is switched to the radio device 14. Furthermore, the timing signal generation circuit 19 continues to generate the same timing signal b even if the synchronization signal is not detected for a certain period of time.
以上のように、同期信号が検出されなくなる
と、中継局Ｒに備えられた同期信号発生回路２２
が動作し、下位局へ同期信号が送出されるので、
下位側に位置する中継局Ｒは、不必要に無線機の
切替え動作を行わない。 As described above, when the synchronization signal is no longer detected, the synchronization signal generation circuit 22 provided in the relay station R
operates and a synchronization signal is sent to the lower station, so
The relay station R located at the lower level does not unnecessarily perform a wireless device switching operation.
本発明は、以上説明したように、中継局が同期
信号が検出できなくなると、中継局がもつ同期信
号発生器からの同期信号を下位局へ送出するよう
に構成することにより、本局より下位局の中継局
で同期信号を検出しなくなつたために、不必要に
二重化されたユニツトが切替えられることがない
優れた効果がある。
As explained above, the present invention is configured such that when the relay station cannot detect a synchronization signal, the synchronization signal from the synchronization signal generator of the relay station is sent to the lower-order station. This has the advantage that duplicated units are not unnecessarily switched over because the synchronization signal is no longer detected at the relay station.
第１図は本発明方式を適用するための無線通信
システムの一例を示すブロツク構成図。第２図は
従来の無線中継装置のブロツク構成図。第３図は
本発明一実施例無線中継装置のブロツク構成図。
第４図は本発明の無線中継装置内の信号のタイム
チヤート。
Ａ……中央局、R1〜Ro……中継局、Ｓ……子
局、１，２，４，５，１３，１４，２４……無線
機、６，７，１２……無線機切替器、８……信号
再生回路、１１，２５……空中線、１５……信号
再生器、１６……同期信号検出器、１７……フリ
ツプフロツプ、１８……制御器、１９……タイミ
ング信号発生器、２０……ノツト回路、２１，２
３……アンド回路、２２……同期信号発生器。
FIG. 1 is a block diagram showing an example of a wireless communication system to which the method of the present invention is applied. FIG. 2 is a block diagram of a conventional wireless relay device. FIG. 3 is a block diagram of a wireless relay device according to an embodiment of the present invention.
FIG. 4 is a time chart of signals within the wireless relay device of the present invention. A...Central station, R1 to R o ...Relay station, S...Slave station, 1, 2, 4, 5, 13, 14, 24...Radio equipment, 6, 7, 12...Radio equipment switching 8... Signal regeneration circuit, 11, 25... Antenna, 15... Signal regenerator, 16... Synchronization signal detector, 17... Flip-flop, 18... Controller, 19... Timing signal generator, 20...Knot circuit, 21,2
3...AND circuit, 22...Synchronization signal generator.
Claims (1)
する受信手段と、 この手段の出力信号を前記同期信号を含めて下
位局へ中継送信する送信手段と を備え、 前記両手段のうち少なくとも受信手段に二重化
された部分を含み、一方に障害があるときには他
方に切替を行つて使用することができるように構
成され、 さらに、前記受信手段の出力信号から上位局の
送信する同期信号を検出する同期信号検出手段を
備え、 前記切替はこの同期信号検出手段に検出出力が
なくなつたときに行うように構成された 無線中継装置において、 上位局の送信する同期信号とは独立に同等の同
期信号を発生する同期信号発生手段と、 前記検出出力がなくなつたときにこの同期信号
発生手段の送出する同期信号を前記送信手段の入
力に結合する手段と を備えたことを特徴とする無線中継装置。[Scope of Claims] 1. A receiving means for receiving a radio signal including a synchronization signal from an upper station, and a transmission means for relaying an output signal of this means, including the synchronization signal, to a lower station, and both of the above. The means includes at least a duplex portion in the receiving means, and is configured so that when one side has a failure, it can be used by switching to the other; A wireless relay device comprising a synchronization signal detection means for detecting a synchronization signal, and configured such that the switching is performed when the synchronization signal detection means no longer has a detection output, independent of the synchronization signal transmitted by the upper station. A synchronizing signal generating means for generating a synchronizing signal equivalent to the above, and a means for coupling the synchronizing signal sent by the synchronizing signal generating means to the input of the transmitting means when the detection output disappears. wireless relay equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17999683A JPS6070832A (en) | 1983-09-27 | 1983-09-27 | Radio relay device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17999683A JPS6070832A (en) | 1983-09-27 | 1983-09-27 | Radio relay device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6070832A JPS6070832A (en) | 1985-04-22 |
| JPH029490B2 true JPH029490B2 (en) | 1990-03-02 |
Family
ID=16075628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17999683A Granted JPS6070832A (en) | 1983-09-27 | 1983-09-27 | Radio relay device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6070832A (en) |
-
1983
- 1983-09-27 JP JP17999683A patent/JPS6070832A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6070832A (en) | 1985-04-22 |
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