JPH03243031A - Line switching circuit - Google Patents
Line switching circuitInfo
- Publication number
- JPH03243031A JPH03243031A JP4047290A JP4047290A JPH03243031A JP H03243031 A JPH03243031 A JP H03243031A JP 4047290 A JP4047290 A JP 4047290A JP 4047290 A JP4047290 A JP 4047290A JP H03243031 A JPH03243031 A JP H03243031A
- Authority
- JP
- Japan
- Prior art keywords
- line
- circuit
- switching
- signal
- sending end
- 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
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 abstract description 31
- 230000010287 polarization Effects 0.000 description 22
- 238000000926 separation method Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000005562 fading Methods 0.000 description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012546 transfer Methods 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、直交２ｆＲ波をコチャネル配置して伝送する
ディジタル無線通信システムにおける回線切替方式に関
する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a line switching system in a digital wireless communication system in which orthogonal 2fR waves are arranged and transmitted in co-channels.
（従来の技術）
周知のように、無線通信ではフェージング等で回線品質
が劣化しても一定の通信を確保するために予備回線を備
えるが、ディジタル無線通信では１ビツトのエラーも生
じさせないで、即ち、ヒツトレスに回線の切り替えを行
う回線切替方式が採用されるようになってきている。(Prior art) As is well known, in wireless communication, a backup line is provided to ensure constant communication even if the line quality deteriorates due to fading, etc., but in digital wireless communication, it is necessary to prevent even a single bit error from occurring. In other words, a line switching system that performs hitless line switching is increasingly being adopted.
この種の回線切替方式としては、従来、例えば第３図に
示すものが知られている。第３図（ａ）において、送端
側装置では、Ｎ個の送端切替回路（１１〜１〜ＩＩ−Ｎ
＞は、送端回線切替制御回路１７がらの制御信号（Ｄ
＋〜ＤＮ）の対応するもので個別に切替制御されるが、
通常Ｎ個の入力信号（２０１−１〜２０１−Ｎ）の対応
するものを多重化回路（１２−１〜＋２−Ｎ）の対応す
るものに伝達し、またパイロット信号発生回路Ｉ６の出
力たるパイロット信号を予備系の多重化回路１２−Ｏに
伝達するように制御される。そして、回線障害時等にお
いて、その障害回線に対応する制御信号、例えば制御信
号り、が送端並列動作のために出力されると、送端切替
回路１１−１は、多重化回路１２−０の入力をパイロッ
ト信号から入力信号２０１−１に切り替えるように制御
される。As this type of line switching system, the one shown in FIG. 3, for example, is conventionally known. In FIG. 3(a), the sending end device has N sending end switching circuits (11-1-II-N
> is the control signal (D
+~DN) are individually switched and controlled,
Normally, corresponding ones of the N input signals (201-1 to 201-N) are transmitted to corresponding ones of the multiplexing circuit (12-1 to +2-N), and the pilot signal which is the output of the pilot signal generation circuit I6 is It is controlled to transmit the signal to the backup multiplexing circuit 12-O. When a line failure occurs, when a control signal corresponding to the faulty line, for example, a control signal, is output for parallel operation at the sending end, the sending end switching circuit 11-1 switches the multiplexing circuit 12-0 to the sending end switching circuit 11-1. is controlled to switch the input from the pilot signal to the input signal 201-1.
一方、第３図＜ｂンにおいて、受端側装置では、（１＋
Ｎ）の各回線の多重化信号が対応する回線監視回路（１
３−０，１３−１〜ｌ３−Ｎ）を介して対応する分離化
回路（１４−０，１４−１〜＋４−Ｎ）に入力する０分
離化回路（＋４−０．１４−１〜＋４−Ｎ）は、多重化
信号から無線区間で挿入された付加ビットを取り除き、
符号変換等をして対応する回線における入力信号を復元
し、出力する。予備系の分離北回ＮＩ４−０の出力は、
パイロット信号検出回路１８に入力するとともに、Ｎ個
の受端切替回路（＋５−１〜＋５−Ｎ）の一方の入力と
なる。また、現用系の分離化回路（＋４−１〜ｌ４−Ｎ
）の出力たるＮ個の出力信号（２０３−１〜２０３−Ｎ
）はＮ個の受端切替図ｇ＜＋ｓ−ｉ〜＋５−Ｎ＞の対応
するものの他方の入力となる。On the other hand, in FIG.
The line monitoring circuit (1) to which the multiplexed signal of each line of N) corresponds
0 separation circuits (+4-0.14-1 to +4) input to the corresponding separation circuits (14-0, 14-1 to +4-N) via -N) removes the additional bits inserted in the radio section from the multiplexed signal,
It performs code conversion etc. to restore the input signal on the corresponding line and outputs it. The output of the standby system's separated northern circuit NI4-0 is:
It is input to the pilot signal detection circuit 18 and also serves as one input of N receiving end switching circuits (+5-1 to +5-N). In addition, the current system separation circuit (+4-1 to l4-N
) output signals (203-1 to 203-N
) becomes the other input of the corresponding one of the N receiving end switching diagrams g<+s-i to +5-N>.
受端切替回路（＋５−１〜ｌ５−Ｎ）は、受端回線切替
制御回路１９からの切替信号（Ｅｌ〜Ｅｓ）の対応する
もので個別に切替制御されるが、通常は他方の入力を選
択出力する。そして、回線障害等が発生していない場合
は、予備回線にはパイロット信号が伝送されるから、分
離化回路１４−０の出力はパイロット信号である。パイ
ロット信号検出回路！８は入力信号がパイロット信号で
あるときは、予備回線の使用状態信号Ｃを「使用可」に
して受端回線切替制御回路１９へ通知する。The receiving end switching circuits (+5-1 to 15-N) are individually switched and controlled by the corresponding switching signals (El to Es) from the receiving end line switching control circuit 19, but normally the other input is Selectively output. If no line failure has occurred, the pilot signal is transmitted to the protection line, so the output of the separation circuit 14-0 is the pilot signal. Pilot signal detection circuit! 8, when the input signal is a pilot signal, sets the protection line usage status signal C to "available" and notifies the receiving end line switching control circuit 19.
受端回線切替制御回路１９は、現用系の回線監視回路（
＋３−１〜＋３−Ｎ）からの障害信号（Ａ ｒ〜ＡＮ）
、および予備系の回ｌ１ＩＷ：Ｌ＃１回路１３−０がら
の障害信号Ｂを受けて次のように動作し、切替信号（Ｅ
＋〜ＥＮ）のいずれか１つでもって受端切替回路（＋５
−１〜ｌ５−Ｎ）の対応するものに一方の入力を選択さ
せることを行う。The receiving end line switching control circuit 19 is a working line monitoring circuit (
+3-1~+3-N) fault signal (A r~AN)
, and the backup circuit l1IW: In response to the fault signal B from the L#1 circuit 13-0, the operation is as follows, and the switching signal (E
+~EN) to switch the receiving end switching circuit (+5
-1 to l5-N) to select one input.
例えば、回線監視回路１３−１において現用回線の障害
が検出され、障害信号Ａ、が出力されると、受端回線切
替制御回路１９は障害信号Ｂの内容によって予備回線の
障害有無を調べ、さらに使用状態信号Ｃの内容によって
予備回線の使用状態の確認を行う、その結果、予備回線
が使用可能であれば、受端回線切替制御回路１９は、次
に、送端側の送端回線切替制御回路１７へ「第何番目の
回線が障害である」旨の通知を発し、送端側の送端切替
回路１１−１に前記しな送端並列動作を開始させる。そ
して、受端回線切替制御回路回路Ｉ９は、使用状態信号
Ｃの内容によって送端並列動作が正しく行われ予備回線
にパイロット信号が存在しないこと、即ち、送端並列動
作の完了を確認できると、今度は受端切替回路の再入力
信号（即ち、予備回線信号２０４と出力信号２０３−１
＞を比較し、ビットおよび位相の一致が確認された後に
切替信号Ｅ、によって受端切替回路１５−１を予備回線
側にヒツトレスに切り替えさせる。これにより障害回線
の救済を完了する。For example, when the line monitoring circuit 13-1 detects a fault in the working line and outputs a fault signal A, the receiving end line switching control circuit 19 checks whether there is a fault in the protection line based on the content of the fault signal B, and then The usage status of the protection line is confirmed based on the content of the usage status signal C. As a result, if the protection line can be used, the receiving end line switching control circuit 19 then controls the sending end line switching control on the sending end side. A notification is issued to the circuit 17 to the effect that ``what number line is in trouble'' and causes the sending end switching circuit 11-1 on the sending end side to start the above-mentioned parallel sending end operation. Then, when the receiving end line switching control circuit I9 can confirm that the sending end parallel operation is correctly performed and there is no pilot signal on the protection line based on the contents of the usage status signal C, that is, the sending end parallel operation is completed. This time, the re-input signal of the receiving end switching circuit (i.e., the protection line signal 204 and the output signal 203-1
> and after it is confirmed that the bits and phases match, the receiving end switching circuit 15-1 is switched to the protection line side in a hitless manner by the switching signal E. This completes the repair of the faulty line.
ところで、近年、ディジタル無線通信システムでは、周
波数の有効利用等の観点から多値ディジタル変調方式が
採用されるとともに、同一周波数の互いに直交する２つ
の偏波（例えば水平偏波と垂直偏波、右旋円偏波と左旋
円偏波等）を使用する直交偏波通信方式が採用されて来
ている。この直交偏波通信方式での周波数配置にはコチ
ャネル配置とインターリーブ配置とがある。インターリ
ーブ配置は、例えば第４図（ｂ）に示すように、一方の
偏波を適宜周波数間隔で交互に配置するもので、アナロ
グ方式でも採用されている配置である。一方、コチャネ
ル配置は、例えば第４図（ａ）に示すように、同一周波
数の直交２偏波を適宜周波数間隔で配置するもので、干
渉に強いディジタル方式で初めて可能となる配置である
。Incidentally, in recent years, digital wireless communication systems have adopted multilevel digital modulation methods from the viewpoint of effective frequency utilization, and have also adopted two mutually orthogonal polarized waves of the same frequency (for example, horizontal polarization and vertical polarization, right-handed polarization, etc.). Orthogonal polarization communication systems that use circularly polarized waves, left-handed circularly polarized waves, etc.) have been adopted. Frequency allocation in this orthogonal polarization communication system includes co-channel allocation and interleaved allocation. In the interleaved arrangement, for example, as shown in FIG. 4(b), one polarized wave is arranged alternately at appropriate frequency intervals, and is an arrangement that is also used in analog systems. On the other hand, the co-channel arrangement, as shown in FIG. 4(a), for example, involves arranging two orthogonal polarized waves of the same frequency at appropriate frequency intervals, and is an arrangement that has become possible for the first time in a digital system that is resistant to interference.
（発明が解決しようとする課題）
そうすると、コチャネル配置を採用するディジタル無線
通信システムにおいて障害回線の救済をどのようにする
かが問題となる。(Problem to be Solved by the Invention) The problem then becomes how to repair a faulty line in a digital wireless communication system that employs a co-channel arrangement.
即ち、インターリーブ配置であれば、１つの救済予備伝
送路を用いる上述した従来の回線切替方式をそのまま適
用できる。しかし、コチャネル配置の場合には、例えば
第５図に示すように、１周波直交偏波の片偏波側Ｐを救
済予備伝送路（予備用回線）として用いたとしても、無
線伝搬路上で周波数選択性フェージングが発生した場合
、同一周波の両偏波伝送路（例えば現用回線Ｒ４と同Ｒ
５）が同時に障害となる確率が高く、この場合にはいず
れか一方の偏波伝送路の救済が不可能となるという問題
がある。That is, in the case of interleaved arrangement, the above-mentioned conventional line switching method using one relief backup transmission path can be applied as is. However, in the case of a co-channel arrangement, as shown in FIG. When selective fading occurs, both polarized transmission lines of the same frequency (for example, the working line R4 and the same
There is a high probability that 5) will become a failure at the same time, and in this case, there is a problem that it becomes impossible to repair one of the polarized wave transmission paths.
本発明は、このような問題に鑑みなされたもので、その
目的は、直交２偏波をコチャネル配置して伝送するディ
ジタル無線通信システムにおいて有効に障害回線の救済
をなし得る回線切替方式を提供することにある。The present invention has been made in view of these problems, and its purpose is to provide a line switching method that can effectively repair a faulty line in a digital wireless communication system in which two orthogonal polarized waves are arranged and transmitted as co-channels. There is a particular thing.
（課題を解決するための手段）
前記目的を達成するために、本発明の回線切替方式は次
の如き構成を有する。(Means for Solving the Problems) In order to achieve the above object, the line switching system of the present invention has the following configuration.
即ち、本発明の回線切替方式は、直交２偏波をコチャネ
ル配置して伝送するディジタル無線通信システムにおい
て； 直交２偏波それぞれを使用する２つの予備用回線
を設けるとともに； 送端側が、直交２偏波それぞれを
使用する複数の現用回線のそれぞれで伝送する複数の入
力信号を２分した一方の入力信号ごとに設けられ制御信
号を受けて当該入力信号を該当現用回線と前記一方の予
備用回線とに送出させる送端並列動作を行う第１の送端
切替回路、および、前記２分した他方の入力信号ごとに
設けられ制御信号を受けて当該入力信号を該当現用回線
と前記他方の予備用回線とに送出させる送端並列動作を
行う第２の送端切替回路と； 受端側からの指令を受け
て、前記各送端切替回路における該当する１つの送端切
替回路に対し前記制御信号を出力すること、前記第１お
よび第２の送端切替回路における該当する１周波直交２
偏波の現用回線を扱う１つの第１および第２の送端切替
回路に前記制御信号をそれぞれ出力することを行う送端
切替制御回路と； を備え、受端側が、２つの予備用回
線および複数の現用回線それぞれの回線状態を監視する
回線監視回路と：複数の現用回線での受信信号を２分し
た一方の受信信号ごとに設けられ切替信号を受けて当該
受信信号に替えて前記一方の予備用回線での受信信号を
出力する第１の受端切替回路、および、前記２分した他
方の受信信号ごとに設けられ切替信号を受けて当該受信
信号に替えて前記他方の予備用回線での受信信号を出力
する第２の受端切替回路と； 複数の現用回線において
１周波直交２偏波の一方または双方の偏波伝送路に回線
障害等が生じたとき送端側へ前記指令を発すること、前
記送端並列動作の完了確認後に該当する１つまたは２つ
の前記受端切替回路に前記切替信号を出力することを行
う受端切替制御回路と； を備えたことを特徴とするも
のである。That is, the line switching system of the present invention is applicable to a digital wireless communication system in which two orthogonal polarized waves are transmitted by co-channeling; two backup lines each using the two orthogonal polarized waves are provided; A control signal is provided for each input signal, which is obtained by dividing a plurality of input signals transmitted on each of a plurality of working lines using each polarized wave into two, and transmits the input signal to the corresponding working line and one of the protection lines. A first sending end switching circuit is provided for each of the other input signals divided into two, and is provided for each of the two divided input signals, and receives a control signal to transfer the input signals to the corresponding working line and the other protection line. a second sending-end switching circuit that performs a sending-end parallel operation to send data to the line; upon receiving a command from the receiving end, the control signal is sent to the corresponding one sending-end switching circuit in each of the sending-end switching circuits; outputting the corresponding one-frequency orthogonal 2 in the first and second transmission end switching circuits;
a transmitting end switching control circuit that outputs the control signal to one first and second transmitting end switching circuit that handles the polarized working line; and the receiving end side has two protection lines and A line monitoring circuit that monitors the line status of each of a plurality of working lines: A line monitoring circuit that is provided for each received signal of one of the two halves of the received signals on the plurality of working lines, and receives a switching signal and switches the received signal to one of the two. a first receiving end switching circuit that outputs the received signal on the protection line; and a first receiving end switching circuit provided for each of the other received signals divided into two, receiving the switching signal and switching the received signal to the other protection line. a second receiving end switching circuit that outputs a received signal; and a second receiving end switching circuit that outputs the above-mentioned command to the sending end side when a line failure or the like occurs in one or both of the polarization transmission paths of one frequency orthogonal two polarized waves in the plurality of working lines; and a receiving end switching control circuit that outputs the switching signal to one or two corresponding receiving end switching circuits after confirming completion of the sending end parallel operation. It is.
（作 用）
次に、前記の如く構成される本発明の回線切替方式の作
用を説明する。(Function) Next, the function of the line switching system of the present invention configured as described above will be explained.
本発明方式では、２つの予備用回線Ａ、同Ｂを設けると
ともに、直交２偏波それぞれを使用する複数の現用回線
信号を２つのグループに分け、−方のグループに予備用
回線Ａを割り付け、他方のグループに予備用回線Ｂを割
り付ける。In the method of the present invention, two protection lines A and B are provided, and a plurality of working line signals using two orthogonal polarizations are divided into two groups, and the protection line A is allocated to the negative group. Allocate protection line B to the other group.
その結果、任意の１つの現用回線、即ち、１周波片偏波
伝送路に障害が発生した場合は勿論のこと、同一周波直
交２偏波を使用する２つの現用回線、グループの異なる
異周波片偏波を使用する２つの現用回線で障害が発生し
た場合でも確実に救済できる。As a result, not only can a failure occur in any one working line, that is, a single-frequency single-polarization transmission line, but also two working lines using the same frequency and two orthogonal polarizations, or different frequency lines in different groups. Even if a failure occurs in two working lines that use polarized waves, it can be reliably rescued.
（実 施 例） 以下、本発明の実施例を添付図面を参照して説明する。(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図は本発明の一実施例に係る回線切替方式を示す、
第１図（ａ）において、送端側装置では、多重化・送信
回路（１，２）が予備系であり、その他の多重化・送信
回路（３，４）、同（５，６）が現用系である。予備系
の一方の多重化・送信回路１の出力は例えば水平偏波（
Ｈ）の伝送路に送出され、予備系の他方の多重化・送信
回路２の出力は垂直偏波（Ｖ）の伝送路に送出される。FIG. 1 shows a line switching system according to an embodiment of the present invention.
In Figure 1(a), in the sending end device, the multiplexing/transmitting circuits (1, 2) are the backup system, and the other multiplexing/transmitting circuits (3, 4) and (5, 6) are This is the current system. The output of the multiplexing/transmission circuit 1 on one side of the standby system is, for example, a horizontally polarized wave (
The output of the other multiplexing/transmission circuit 2 of the standby system is sent to the vertically polarized (V) transmission line.
また、現用系では、多重化・送信回路３と同６の各出力
が垂直偏波（Ｖ）の伝送路に送出され、多重化・送信回
路４と同５の各出力が水平偏波（Ｈ）の伝送路に送出さ
れるとして示しである。即ち、多重化・送信回路（１，
２＞、同（３，４）、同（５゜６）はそれぞれ１周波直
交２偏波を形成する。In addition, in the current system, the outputs of the multiplexing/transmitting circuits 3 and 6 are sent to the vertically polarized (V) transmission path, and the outputs of the multiplexing/transmitting circuits 4 and 5 are sent to the horizontally polarized (H ) is shown as being sent to the transmission path. That is, the multiplexing/transmission circuit (1,
2>, (3, 4), and (5°6) each form two orthogonal one-frequency polarized waves.
パイロット信号発生回路７は、２つのパイロット信号を
発生する。一方のパイロット信号は送端切替回路９．同
８を介して多重化・送信回路２に入力し、他方のパイロ
ット信号は送端切替口ＦＩ＠ｌｌ。Pilot signal generation circuit 7 generates two pilot signals. One pilot signal is sent to the sending end switching circuit 9. The other pilot signal is input to the multiplexing/transmission circuit 2 via the same 8, and the other pilot signal is sent to the sending end switching port FI@ll.
同１０を介して多重化・送信回路１に入力する。The signal is input to the multiplexing/transmission circuit 1 via the same 10.
送端切替回路（８〜１１）は、送端回線切替制御回路Ｉ
２からの制御信号（Ｄ１〜Ｄ４）の対応するもので個別
に制御され、正常時には入力信号（Ｒ１（Ａ）、Ｒ１（
Ｂ）、Ｒ２（Ａ）、Ｒ２（Ｂ））を多重化・送信回路（
３〜６）の対応するものへ、２つのパイロット信号を多
重化・送信回路（１，２＞の対応するものへそれぞれ出
力し、障害発生時に送端並列動作を行う点従来と同様で
あるが、図示するように、送端切替回路（８，９）はＢ
グループの入力信号（Ｒ１（Ｂ）、Ｒ２（Ｂ））を対象
とし、送端切替回路（１０，１１）はＡグループの入力
信号（Ｒ１（Ａ）、Ｒ２（Ａ））を対象とする。The sending end switching circuit (8 to 11) is the sending end line switching control circuit I.
The input signals (R1 (A), R1 (
B), R2(A), R2(B)) are multiplexed and transmitted by a circuit (
3 to 6), the two pilot signals are output to the corresponding multiplexing/transmission circuits (1, 2>), and when a failure occurs, parallel operation at the transmitting end is performed, which is similar to the conventional method. , as shown in the figure, the sending end switching circuit (8, 9) is B
The input signals of the group (R1(B), R2(B)) are targeted, and the sending end switching circuits (10, 11) are targeted for the input signals of the A group (R1(A), R2(A)).
即ち、正常時では、入力信号（Ｒ１（Ａ＞、Ｒ１（Ｂ）
）は多重化・送信回路（３，４）によって、また入力信
号（Ｒ２（Ａ）、Ｒ２（Ｂ））は多重化・送信回路（５
，６）によって、それぞれ同一周波直交２（ｉｉ波の現
用回線に送出されるが、それぞれ一方をＡグループ、他
方をＢグループとし、障害時にはＡグループの入力信号
（Ｒ１（Ａ＞、Ｒ２（Ａ））は多重化・送信回路１から
水平偏波（Ｈ）の伝送路に送出され、Ｂグループの入力
信号（Ｒ１（Ｂ）、Ｒ２（Ｂ））は多重化・送信回路２
から垂直偏波（Ｖ）の伝送路に送出されるようにしであ
る（第２図参照）。That is, under normal conditions, the input signal (R1(A>, R1(B)
) are transmitted by the multiplexing and transmitting circuit (3, 4), and the input signals (R2(A), R2(B)) are transmitted by the multiplexing and transmitting circuit (5).
, 6) are sent to the working line of the same frequency orthogonal 2 (II wave), but one side is set to the A group and the other to the B group, and in the event of a failure, the input signals of the A group (R1 (A>, R2 (A )) is sent from the multiplexing/transmission circuit 1 to the horizontally polarized (H) transmission path, and the input signals of group B (R1(B), R2(B)) are sent to the multiplexing/transmission circuit 2.
It is arranged so that it is transmitted from the vertically polarized wave (V) to the transmission path (see Fig. 2).
第１図（ｂ）において、受信側装置では、送信側と１対
１に対応する受信系は、受信・直交偏波等化回路（２１
〜２６）、回線監視回路（２７〜３２）および分離化回
路（３３〜３８）で構成される。そして、受信・直交偏
波等化回路（２１，２２）、回線監視回路（２７，２８
）および分離化回路（３３，３４＞が予備の受信系であ
り、その２出力はパイロット信号検出回路３９に入力す
る。また、２つの予備系の出力のうち、水平偏波（Ｈ）
の伝送路での受信信号は受端切替回路４０．同４１の一
方の入力となり、垂直偏波（Ｖ）の伝送路での受信信号
は受端切替回路４２．同４３の一方の入力となっている
。In FIG. 1(b), in the receiving side device, the receiving system that corresponds one-to-one with the transmitting side is a receiving/orthogonal polarization equalization circuit (21
~26), line monitoring circuits (27~32), and separation circuits (33~38). Then, the reception/orthogonal polarization equalization circuit (21, 22), the line monitoring circuit (27, 28)
) and separation circuit (33, 34> are backup receiving systems, and their two outputs are input to the pilot signal detection circuit 39. Also, among the outputs of the two backup systems, horizontal polarization (H)
The received signal on the transmission path is sent to the receiving end switching circuit 40. 41, and the received signal on the vertically polarized (V) transmission path is received by the receiving end switching circuit 42. This is one input of 43.
現用の受信系では、受信・直交偏波等化回路（２３，２
４）、回線監視回路（２９，３０）および分離化回路０
５．３６）が入力信号（Ｒ１（Ａ）、Ｒ１（Ｂ））の送
信系に対応し、また受信・直交偏波等化回路（２５゜２
６）、回線監視回路（３１，３２＞および分離北回ｆ￥
８ （３７゜３８）が入力信号（Ｒ２（Ａ）、Ｒ２（Ｂ
））の送信系に対応する。この受信系において、分離化
回路（３５，３７）の出力は受端切替回路（４２，４３
）の対応するものの他方の入力となり、分離化回路（３
６，３８）の出力は受端切替回路（４０，４１）の対応
するものの他方の入力となっている。In the current receiving system, the receiving/orthogonal polarization equalization circuit (23, 2
4), line monitoring circuit (29, 30) and separation circuit 0
5.36) corresponds to the transmission system of the input signals (R1(A), R1(B)), and the receiving/orthogonal polarization equalization circuit (25°2
6), line monitoring circuit (31, 32> and separated north circuit f￥
8 (37°38) is the input signal (R2(A), R2(B)
)) corresponds to the transmission system. In this receiving system, the output of the separation circuit (35, 37) is the receiving end switching circuit (42, 43).
) becomes the other input of the corresponding one of the separation circuit (3
The outputs of the terminals 6, 38) serve as the other inputs of the corresponding receiving end switching circuits (40, 41).
受端切替回路（４０〜４３）は、受端回線切替制御回路
４４からの切替信号（Ｅｌ〜Ｅ４）の対応するもので個
別に制御され、正常時には他方の入力（現用系受信信号
）を選択し、障害時には一方の入力（予備系受信信号）
を選択し、出力する。The receiving end switching circuits (40 to 43) are individually controlled by corresponding switching signals (El to E4) from the receiving end line switching control circuit 44, and select the other input (working system receiving signal) during normal operation. However, in the event of a failure, one input (standby system received signal)
Select and output.
受端回線切替制御回路４４は、従来と同様に、パイロッ
ト信号検出回路３９から予備回線の使用状態信号Ｃ′を
受け、回線監視回路（２７〜３２）から障害信号（Ｂｌ
、Ｂ２．Ａｌ−Ａ４）を受け、送信側に送端並列動作の
指示を発し、その動作完了確認後に受端切替回路（４０
〜４３）の対応するものに切替信号（Ｅｌ〜Ｅ４）の対
応するものを出力する。The receiving end line switching control circuit 44 receives the protection line usage status signal C' from the pilot signal detection circuit 39 and receives the failure signal (Bl
, B2. After receiving the signal (Al-A4), it issues an instruction to the transmitting end for parallel operation at the transmitting end, and after confirming the completion of the operation, the receiving end switching circuit (40
-43) to output the corresponding ones of the switching signals (El to E4).
以上の構成において、例えば回線監視回路３１が障害信
号Ａ３を出力すると、送端側では受端側からの指示に従
って２通りの送端並列動作を行う。In the above configuration, for example, when the line monitoring circuit 31 outputs the failure signal A3, the sending end performs two types of sending end parallel operations in accordance with instructions from the receiving end.
１つは、送端切替回路９のみを独立に送端並列動作を行
わせる。この場合には、入力信号Ｒ２（Ｂ）のみが予備
系の垂直偏波（Ｖ）の伝送路を用いて伝送される。他の
１つは、送端切替回路つと同１１を同期して送端並列動
作を行わせる。この場合には、入力信号Ｒ２（Ａ）は予
備系の水平偏波（Ｈ）の伝送路を用いて伝送される０周
波数選択性フェージングによって発生する両偏波伝送路
の障害を確実に救済できるのである（第２図）。One is to cause only the sending end switching circuit 9 to perform the sending end parallel operation independently. In this case, only the input signal R2 (B) is transmitted using the backup vertically polarized (V) transmission path. The other one is to synchronize the sending end switching circuit 1 and the sending end switching circuit 11 to perform the sending end parallel operation. In this case, the input signal R2(A) is transmitted using the horizontal polarization (H) transmission path of the backup system, and it is possible to reliably relieve the disturbance in both polarization transmission paths caused by zero frequency selective fading. (Figure 2).
以上の説明は同一周波直交２１波を使用する２つの現用
回線についてであるが、異周波で片偏波を使用する場合
でもグループが異なれば同様に救済できることは言うま
でもない。The above explanation is about two working lines using the same frequency orthogonal 21 waves, but it goes without saying that even when single polarization is used at different frequencies, relief can be performed in the same way if the groups are different.
（発明の効果）
以上説明したように、本発明の回線切替方式によれば、
直交２偏波それぞれを使用する２つの予備用回線を設け
るとともに、直交２偏波それぞれを使用する複数の現用
回線のそれぞれで伝送する複数の入力信号を２つのグル
ープに分け、それぞれのグループに１ずつ予備用回線を
割り当てるようにしたので、任意の１つの現用回線、即
ち、１周波片偏波伝送路に障害が発生した場合は勿論の
こと、同一周波直交２偏波を使用する２つの現用回線、
またグループの異なる異周波片偏波の２つの現用回線で
障害が発生した場合でも確実に救済できる効果がある。(Effects of the Invention) As explained above, according to the line switching method of the present invention,
In addition to providing two backup lines that use two orthogonal polarizations, divide the input signals to be transmitted on each of the working lines that use two orthogonal polarizations into two groups, and add one signal to each group. Since a backup line is allocated for each line, it goes without saying that if a failure occurs in any one working line, that is, a single-frequency single-polarized transmission line, or if a failure occurs in any one working line, that is, a single-frequency single-polarized transmission line, or if two working lines using the same frequency and two orthogonal polarizations line,
Furthermore, even if a failure occurs in two working lines with different frequency polarizations in different groups, it is possible to reliably recover the problem.
第１図は本発明の一実施例に係る回線切替システムの構
成ブロック図、第２図は動作説明図、第３図は従来の回
線切替方式の構成ブロック図、第４図は直交偏波通信方
式での周波数配置図、第５図は従来の回線切替方式の適
用例を示す図である。
１〜６・・・・・・多重化・送信回路、 ７・・・・・
・パイロット信号発生回路、 ８〜１１・・・・・送端
切替回路、１２・・・・・・送端回線切替制御回路、
２１〜２６・・・・・・受信・直交偏波等化回路、 ２
７〜３２・・・・・回線監視回路、３２〜３８・・・・
・・分離化回路、 ３９・・・・・・パイロット信号検
出回路、 ４０〜４３・・・・・・受端切替回路、 ４
４・・・・・・受端回線切替制御回路。
コ今ヤ不ル伯装置
（ａ）Fig. 1 is a block diagram of the configuration of a line switching system according to an embodiment of the present invention, Fig. 2 is an explanatory diagram of operation, Fig. 3 is a block diagram of the configuration of a conventional line switching system, and Fig. 4 is orthogonal polarization communication. FIG. 5 is a diagram showing an example of application of the conventional line switching method. 1 to 6... Multiplexing/transmission circuit, 7...
・Pilot signal generation circuit, 8 to 11... sending end switching circuit, 12... sending end line switching control circuit,
21 to 26...Reception/orthogonal polarization equalization circuit, 2
7-32... Line monitoring circuit, 32-38...
...Separation circuit, 39...Pilot signal detection circuit, 40-43...Receiving end switching circuit, 4
4...Receiving end line switching control circuit. Koimaya Furuhaku device (a)
Claims (1)
線通信システムにおいて；直交２偏波それぞれを使用す
る２つの予備用回線を設けるとともに；送端側が、直交
２偏波それぞれを使用する複数の現用回線のそれぞれで
伝送する複数の入力信号を２分した一方の入力信号ごと
に設けられ制御信号を受けて当該入力信号を該当現用回
線と前記一方の予備用回線とに送出させる送端並列動作
を行う第１の送端切替回路、および、前記２分した他方
の入力信号ごとに設けられ制御信号を受けて当該入力信
号を該当現用回線と前記他方の予備用回線とに送出させ
る送端並列動作を行う第２の送端切替回路と；受端側か
らの指令を受けて、前記各送端切替回路における該当す
る１つの送端切替回路に対し前記制御信号を出力するこ
と、前記第１および第２の送端切替回路における該当す
る１周波直交２偏波の現用回線を扱う１つの第１および
第２の送端切替回路に前記制御信号をそれぞれ出力する
ことを行う送端切替制御回路と；を備え、受端側が、２
つの予備用回線および複数の現用回線それぞれの回線状
態を監視する回線監視回路と；複数の現用回線での受信
信号を２分した一方の受信信号ごとに設けられ切替信号
を受けて当該受信信号に替えて前記一方の予備用回線で
の受信信号を出力する第１の受端切替回路、および、前
記２分した他方の受信信号ごとに設けられ切替信号を受
けて当該受信信号に替えて前記他方の予備用回線での受
信信号を出力する第２の受端切替回路と；複数の現用回
線において１周波直交２偏波の一方または双方の偏波伝
送路に回線障害等が生じたとき送端側へ前記指令を発す
ること、前記送端並列動作の完了確認後に該当する１つ
または２つの前記受端切替回路に前記切替信号を出力す
ることを行う受端切替制御回路と；を備えたことを特徴
とする回線切替方式。In a digital wireless communication system that transmits two orthogonal polarized waves by placing them in co-channels; two backup lines that use each of the two orthogonal polarized waves are provided; and the sending end has multiple working lines that use each of the two orthogonal polarized waves. A transmitting end parallel operation is provided for each input signal of one of the input signals obtained by dividing the plurality of input signals transmitted on each of the two into two, and receives the control signal and sends the input signal to the corresponding working line and the one protection line. A first sending end switching circuit and a sending end parallel operation which is provided for each of the other input signals divided into two and receives a control signal and sends the input signals to the corresponding working line and the other protection line. a second sending end switching circuit to perform; receiving a command from the receiving end side, outputting the control signal to a corresponding one sending end switching circuit in each of the sending end switching circuits; a transmission-end switching control circuit configured to output the control signal to one first and second transmission-end switching circuits that handle corresponding one-frequency orthogonal two-polarization working lines in the second transmission-end switching circuit; , and the receiving end side is 2
a line monitoring circuit that monitors the line status of each of the two protection lines and the plurality of working lines; a line monitoring circuit that is provided for each received signal of one of the received signals of the plurality of working lines, which receives a switching signal and switches the received signal to the received signal; a first receiving end switching circuit for switching and outputting the received signal on the one protection line; a second receiving end switching circuit that outputs the received signal on the protection line; and a second receiving end switching circuit that outputs the received signal on the protection line; a receiving end switching control circuit configured to issue the command to the sending end parallel operation, and output the switching signal to the corresponding one or two receiving end switching circuits after confirming completion of the sending end parallel operation; A line switching method featuring
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4047290A JPH03243031A (en) | 1990-02-21 | 1990-02-21 | Line switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4047290A JPH03243031A (en) | 1990-02-21 | 1990-02-21 | Line switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03243031A true JPH03243031A (en) | 1991-10-30 |
Family
ID=12581573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4047290A Pending JPH03243031A (en) | 1990-02-21 | 1990-02-21 | Line switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03243031A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05211461A (en) * | 1992-01-30 | 1993-08-20 | Nec Corp | Double polarized wave transmission system |
| JPH0918387A (en) * | 1995-06-28 | 1997-01-17 | Nec Corp | Reception hot standby system |
| JPH0927774A (en) * | 1995-07-12 | 1997-01-28 | Nec Corp | Transmission hot standby system |
-
1990
- 1990-02-21 JP JP4047290A patent/JPH03243031A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05211461A (en) * | 1992-01-30 | 1993-08-20 | Nec Corp | Double polarized wave transmission system |
| JPH0918387A (en) * | 1995-06-28 | 1997-01-17 | Nec Corp | Reception hot standby system |
| JPH0927774A (en) * | 1995-07-12 | 1997-01-28 | Nec Corp | Transmission hot standby system |
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