JPH04356827A - Transmission line monitor switching system - Google Patents
Transmission line monitor switching systemInfo
- Publication number
- JPH04356827A JPH04356827A JP13016791A JP13016791A JPH04356827A JP H04356827 A JPH04356827 A JP H04356827A JP 13016791 A JP13016791 A JP 13016791A JP 13016791 A JP13016791 A JP 13016791A JP H04356827 A JPH04356827 A JP H04356827A
- Authority
- JP
- Japan
- Prior art keywords
- line
- switching
- transmission
- reception
- active line
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 24
- 238000012544 monitoring process Methods 0.000 claims description 11
- 230000005684 electric field Effects 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 abstract 2
- 238000006731 degradation reaction Methods 0.000 abstract 2
- 230000000593 degrading effect Effects 0.000 abstract 1
- 238000005562 fading Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は無線通信回線を構成し、
現用Ｎ回線対予備１回線方式の伝送路監視切替方式に関
する。[Industrial Application Field] The present invention constitutes a wireless communication line,
This invention relates to a transmission line monitoring switching system for N working lines to one protection line system.
【０００２】0002
【従来の技術】従来の１対Ｎ（Ｎは整数）無線通信回線
の回線監視と切替方式は、回線品質を端局と端局と間の
符号誤り率（以下ＢＥＲという）により監視し、回線品
質を表すＢＥＲがある設定値以下に劣化したときに現用
から予備への回線切り替えを行っていた。[Prior Art] A conventional line monitoring and switching system for a 1-to-N (N is an integer) wireless communication line monitors the line quality based on the bit error rate (hereinafter referred to as BER) between terminal stations. When the BER, which indicates quality, deteriorated below a certain set value, the line was switched from the active line to the backup line.
【０００３】0003
【発明が解決しようとする課題】上述した従来の伝送路
監視切替方式は、切替制御の情報にＢＥＲ情報を用いて
いるが、フェーディングによる伝送路の劣化がただちに
、ＢＥＲ情報には表れないので、伝送路が劣化しはじめ
てから回線切替が行われるのに遅延が生じるという欠点
がある。したがってあらかじめ設定されたＢＥＲの値以
下に劣化して回線切り替えが行われ救済されるまでの期
間が、回線品質を保持するための規定値を超えるおそれ
があった。[Problems to be Solved by the Invention] The conventional transmission line monitoring switching system described above uses BER information for switching control information, but deterioration of the transmission line due to fading does not immediately appear in the BER information. However, there is a drawback that there is a delay in line switching after the transmission line begins to deteriorate. Therefore, there is a risk that the period from when the BER deteriorates below a preset BER value until the line is switched and rescued exceeds a specified value for maintaining line quality.
【０００４】0004
【課題を解決するための手段】本発明の伝送路監視切替
方式は、現用Ｎ（Ｎは整数）対予備１の通信回線を有す
る伝送路監視切替方式において、現用Ｎの回線から予備
回線へ切り換えるための回線監視項目として端局と端局
とで監視される符号誤り率（ＢＥＲ）情報に加え受信入
力電界の情報を監視項目として設けている。[Means for Solving the Problems] The transmission line monitoring switching system of the present invention switches from the N working lines to the protection line in a transmission line monitoring switching system having N working lines (N is an integer) to 1 standby line. In addition to bit error rate (BER) information monitored between terminal stations, information on received input electric fields is provided as line monitoring items for this purpose.
【０００５】[0005]
【実施例】次に本発明について図面を参照して説明する
。図１は本発明の一実施例を説明するための一般的な無
線通信回線の構成図である。図１においては、１は送信
端切替器、２は送信符号処理部、３は変調部、４は送信
部、５は受信部、６は復調部、７は受信符号処理部、８
は受信端切替器、９はパイロット信号発生器、１０はパ
イロット信号検出器、１１は切替制御部である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings. FIG. 1 is a configuration diagram of a general wireless communication line for explaining one embodiment of the present invention. In FIG. 1, 1 is a transmission end switch, 2 is a transmission code processing section, 3 is a modulation section, 4 is a transmission section, 5 is a reception section, 6 is a demodulation section, 7 is a reception code processing section, 8
9 is a receiving end switch, 9 is a pilot signal generator, 10 is a pilot signal detector, and 11 is a switching control section.
【０００６】図１の実施例において、伝送路が正常であ
るときには予備回線にはパイロット信号発生器９からパ
イロット信号が伝送されており、パイロット信号検出器
１０により、パイロット信号が検出される。現用回線１
〜Ｎの伝送路のいずれかがフェーディングにより劣化す
ると受信部５にて伝送路の劣化量を受信入力電界の変化
量として検出する。この変化量がある定められた値を超
えると、切替制御部１１にて切替要求信号を送信端切替
器１に送出する。これにより品質が劣化してきているい
ずれかの現用回線の信号を予備回線にも通して、いわゆ
る送端並列をとる。この状態で受信端切替器８に、切替
制御部１１から切替要求信号が送出されるまで待機する
。伝送路の品質がさらに劣化し符号処理部７から出力さ
れるＢＥＲ情報がある定められた値を超えると、切替制
御部１１は受信端切替器８に切替要求信号を送出する。
これにより劣化している現用Ｎの回線の信号を予備回線
に切替える。この一連の動作シーケンスにより、劣化し
ている現用Ｎの回線が救済される。もちろん、受信入力
電界情報に表われない、機器の故障等は従来と同様に符
号処理部７から出力されるＢＥＲ情報により伝達され、
送受の切替器を切り替えることにより救済できる。In the embodiment shown in FIG. 1, when the transmission line is normal, a pilot signal is transmitted from the pilot signal generator 9 to the protection line, and the pilot signal is detected by the pilot signal detector 10. Working line 1
When any of the ~N transmission paths deteriorates due to fading, the receiver 5 detects the amount of deterioration of the transmission path as the amount of change in the received input electric field. When this amount of change exceeds a certain predetermined value, the switching control section 11 sends a switching request signal to the transmission end switching device 1. As a result, signals from any of the working lines whose quality has deteriorated are passed through the protection line as well, so that so-called sending-end parallelization is established. In this state, the receiving end switch 8 waits until a switching request signal is sent from the switching control section 11. When the quality of the transmission path further deteriorates and the BER information output from the code processing unit 7 exceeds a certain value, the switching control unit 11 sends a switching request signal to the receiving end switch 8. As a result, the degraded signal on the working N line is switched to the protection line. Through this series of operation sequences, the deteriorated working line N is rescued. Of course, equipment failures that do not appear in the received input electric field information are transmitted by the BER information output from the code processing section 7, as in the past.
This can be rescued by switching the transmitter/receiver switch.
【０００７】このようにフェージングの場合には、劣化
している現用回線の受端側に予備回線で伝送されて来た
信号も到達しているので、回線の切れる時間は受信端切
替器８の切り替え時間のみであり切り替えの遅延が極め
て少ない。[0007] In the case of fading as described above, since the signal transmitted on the protection line also reaches the receiving end of the deteriorated working line, the time when the line is cut is determined by the receiving end switch 8. There is only a switching time, and the switching delay is extremely small.
【図１】本発明の一実施例を説明する一般的な無線通信
回線の構成図である。FIG. 1 is a configuration diagram of a general wireless communication line explaining an embodiment of the present invention.
１ 送信端切替器 ２ 送信符号処理部 ３ 変調部 ４ 送信部 ５ 受信部 ６ 復調部 ７ 受信符号処理部 ８ 受信端切替器 ９ パイロット信号発生器 １０ パイロット信号検出器 １１ 切替制御部 1 Transmission end switch 2 Transmission code processing section 3 Modulation section 4 Transmitter section 5 Receiving section 6 Demodulation section 7 Reception code processing section 8 Receiving end switch 9 Pilot signal generator 10 Pilot signal detector 11 Switching control section
Claims (1)
線を有する伝送路監視切替方式において、現用Ｎの回線
から予備回線へ切り換えるための回線監視項目として端
局と端局とで監視される符号誤り率（ＢＥＲ）情報に加
え受信入力電界の情報を監視項目として設けていること
を特徴とする伝送路監視切替方式。Claim 1: In a transmission line monitoring switching system having communication lines of N working lines (N is an integer) and 1 protection line, monitoring is performed between terminal stations as a line monitoring item for switching from N working lines to protection lines. A transmission path monitoring switching system characterized in that information on received input electric field is provided as a monitoring item in addition to bit error rate (BER) information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3130167A JP2737446B2 (en) | 1991-06-03 | 1991-06-03 | Transmission line monitoring switching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3130167A JP2737446B2 (en) | 1991-06-03 | 1991-06-03 | Transmission line monitoring switching method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04356827A true JPH04356827A (en) | 1992-12-10 |
| JP2737446B2 JP2737446B2 (en) | 1998-04-08 |
Family
ID=15027624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3130167A Expired - Fee Related JP2737446B2 (en) | 1991-06-03 | 1991-06-03 | Transmission line monitoring switching method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2737446B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59156032A (en) * | 1983-02-25 | 1984-09-05 | Fujitsu Ltd | Line switching system |
-
1991
- 1991-06-03 JP JP3130167A patent/JP2737446B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59156032A (en) * | 1983-02-25 | 1984-09-05 | Fujitsu Ltd | Line switching system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2737446B2 (en) | 1998-04-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19970812 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19971209 |
|
| LAPS | Cancellation because of no payment of annual fees |