JPH03286625A - Transmission line switching system - Google Patents
Transmission line switching systemInfo
- Publication number
- JPH03286625A JPH03286625A JP8500390A JP8500390A JPH03286625A JP H03286625 A JPH03286625 A JP H03286625A JP 8500390 A JP8500390 A JP 8500390A JP 8500390 A JP8500390 A JP 8500390A JP H03286625 A JPH03286625 A JP H03286625A
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- switching
- control information
- switching control
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Detection And Prevention Of Errors In Transmission (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はディジタル伝送路の伝送路切替方式〔従来の
技術〕
第３図は一般的なディジタル伝送路のブロック図であ１
°同図にかいて、１ａ〜Ｉｎ＞よび２ａ〜２ｎは切替回
路、５ＹＳ１〜５ＹＳＮはＮ本の伝送路、５ｙｓｐば１
本の予備伝送路である。この構成によればＮ本の伝送路
ＳＹ８１〜５ＹＳＮに対して１本の予備伝送路５ｙｓｐ
が設けられている。そして、伝送路障害時にＦｉＮ：１
伝送路を切替えて、回線サービスを救済する。この場合
、伝送路両端の切替回路１ａ〜１ｎおよび２ａ〜２ｎ間
で切替制御情報の授受を行なって伝送路の切替えを制御
している。そして、この切替制御情報の伝送は伝送路の
状態。[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a transmission line switching system for digital transmission lines [Prior Art] Fig. 3 is a block diagram of a general digital transmission line.
° In the same figure, 1a to In> and 2a to 2n are switching circuits, 5YS1 to 5YSN are N transmission lines, and 5ysp
This is a backup transmission line for books. According to this configuration, one backup transmission line 5ysp is provided for N transmission lines SY81 to 5YSN.
is provided. Then, FiN: 1 at the time of transmission path failure
Switch the transmission path and rescue the line service. In this case, switching control information is exchanged between switching circuits 1a to 1n and 2a to 2n at both ends of the transmission path to control switching of the transmission path. The transmission of this switching control information depends on the state of the transmission path.
切替要求の種類、切替要求を発出した現用伝送路の番号
、予備伝送路に接続されている現用伝送路の番号などの
情報１ｒ第２図に示すように主信号にフレーム同期情報
Ｆ＞よび切替制御情報Ｋｉ付加してフレームを構成して
時分割に多重する。また、この切替制御情報にの伝送が
正確に行なわれるために、受信側ではｎフレーム連続し
て同一の情報を受信した場合に、その内容を切替制御情
報として認識する手段が取られる。Information such as the type of switching request, the number of the working transmission line that issued the switching request, the number of the working transmission line connected to the protection transmission line, etc. 1r As shown in Figure 2, frame synchronization information F> and switching are added to the main signal. Control information Ki is added to form a frame and time-division multiplexed. Furthermore, in order to accurately transmit this switching control information, the receiving side takes measures to recognize the contents as switching control information when the same information is received for n consecutive frames.
上述した従来の伝送路切替方式は、１フレームに１個の
切替制御情報Ｋをｎ個連続して受信することによって、
切替動作のシーケンスステップを進める。したがって、
この切替制御情報にのｉｉ！！！識ＯためにｎＴ秒の時
間を要することとなυ、７レーム長（Ｔ秒）が長い場合
、筐たは切替シーケンス手順が多い場合には切替動作が
完了する筐での時間が長くなシ、回線を救済するまでに
時間がかかるという欠点がある。In the conventional transmission path switching method described above, by continuously receiving n pieces of switching control information K in one frame,
Proceed through the sequence steps of the switching operation. therefore,
ii! to this switching control information! ! ! If the frame length (T seconds) is long, it will take a long time for the switching operation to complete if there are many switching sequence steps. However, the disadvantage is that it takes time to repair the line.
この発明に係る伝送路切替方式は、１７レーム内にｎ＠
の同一の切替制御情報を配置して時分割多重するもので
ある。The transmission path switching method according to the present invention has n@ within 17 frames.
The same switching control information is arranged and time-division multiplexed.
この発明は受信側での切替制御情報のｇ識に要する時間
を短縮することができる。This invention can shorten the time required for the receiving side to recognize the switching control information.
第１図はこの発明に係る伝送路切替方式に用いるフレー
ムの一実施例を示す構成図である。同図において、Ｋｌ
（１＝１ ＋Ｌ〜ｎ ）は伝送路の状態。FIG. 1 is a configuration diagram showing an embodiment of a frame used in the transmission line switching system according to the present invention. In the same figure, Kl
(1=1+L~n) is the state of the transmission path.
切替要求の種類、切替要求を発生した現用伝送路番号、
予備伝送路に接続している現用伝送路の番号などのｎ個
の切替制御情報であシ、１フレーム（Ｔ秒）内に時間間
隔を秒（ｔ＜＜Ｔ）毎に配置したものである。このため
、受信側ではこのｎ個の切換制御情報Ｋｌ （１＝１．
２．・・１）が全て同一である場合に限って、その内容
が有効であると認識し、切替えシーケンス動作上進める
。したがって、１個の切替制御情報の認識に必要とされ
る時間はｎｔ秒となる。Type of switching request, current transmission line number that generated the switching request,
It consists of n pieces of switching control information such as the number of the working transmission line connected to the protection transmission line, and is arranged in time intervals every second (t<<T) within one frame (T seconds). . Therefore, on the receiving side, these n pieces of switching control information Kl (1=1.
2. ...Only if all 1) are the same, the contents are recognized as valid and the switching sequence proceeds. Therefore, the time required to recognize one piece of switching control information is nt seconds.
以上詳細に説明したように、この発明に係る伝送路切替
方式によれば、対局間の切替制御情報を１フレーム内に
ｎ個配置することによって、受信側でその内容の認識に
要する時間ｔ−ｎＴ秒からｎｔ（ｎｔ＜＜ｎＴ）秒に短
縮することが可能となシ、切替時間を小さくすることが
できるという効果がある。As explained in detail above, according to the transmission path switching method according to the present invention, by arranging n pieces of switching control information between games in one frame, the time required for the receiving side to recognize the contents is t- It is possible to reduce the switching time from nT seconds to nt (nt<<nT) seconds, which has the effect of reducing the switching time.
第１図はこの発明に係る伝送路切替方式に用いられるフ
レームの一実施例を示す構成図、第２図は従来の伝送路
切替前ｋに用いられるフレームをノ
示す構成図、第３図はディジタル伝送路の一般的なブロ
ック図である。
Ｋ１〜Ｋｍ・・・・同一〇切替制御情報、Ｆ・・・・フ
レーム同期情報、１ａ〜１ｎシよび２Ｓ〜２ｎ・・・・
切替回路、ＳＹＳ １−％−８ＹＳＮ・・・・ｎ本の伝
送路、５ｙｓｐ・・・・１本の予備伝送路。FIG. 1 is a block diagram showing an embodiment of a frame used in the transmission line switching method according to the present invention, FIG. 2 is a block diagram showing a frame used before conventional transmission line switching, and FIG. 1 is a general block diagram of a digital transmission path. K1~Km...same〇switching control information, F...frame synchronization information, 1a~1n and 2S~2n...
Switching circuit, SYS 1-%-8YSN...n transmission lines, 5ysp...1 backup transmission line.
Claims (1)
替制御情報を主信号上にフレーム構成にして伝送し、Ｎ
：１の伝送路切替えを行なう伝送路切替方式において、
１フレーム内にｎ個の同一の切替制御情報を配置して時
分割多重することを特徴とする伝送路切替方式。One backup transmission line is provided for N working transmission lines, and switching control information is transmitted in a frame structure on the main signal.
: In the transmission line switching method that performs transmission line switching of 1,
A transmission path switching method characterized by arranging n pieces of identical switching control information within one frame and time-division multiplexing the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8500390A JPH03286625A (en) | 1990-04-02 | 1990-04-02 | Transmission line switching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8500390A JPH03286625A (en) | 1990-04-02 | 1990-04-02 | Transmission line switching system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03286625A true JPH03286625A (en) | 1991-12-17 |
Family
ID=13846520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8500390A Pending JPH03286625A (en) | 1990-04-02 | 1990-04-02 | Transmission line switching system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03286625A (en) |
-
1990
- 1990-04-02 JP JP8500390A patent/JPH03286625A/en active Pending
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