JPH0444857B2 - - Google Patents

Info

Publication number
JPH0444857B2
JPH0444857B2 JP59053858A JP5385884A JPH0444857B2 JP H0444857 B2 JPH0444857 B2 JP H0444857B2 JP 59053858 A JP59053858 A JP 59053858A JP 5385884 A JP5385884 A JP 5385884A JP H0444857 B2 JPH0444857 B2 JP H0444857B2
Authority
JP
Japan
Prior art keywords
line
switching
protection
priority
protection 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.)
Expired - Lifetime
Application number
JP59053858A
Other languages
Japanese (ja)
Other versions
JPS60197041A (en
Inventor
Norio Tajima
Kyoshi Myauchi
Makoto Iwamoto
Hiroyuki Hirose
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP5385884A priority Critical patent/JPS60197041A/en
Publication of JPS60197041A publication Critical patent/JPS60197041A/en
Publication of JPH0444857B2 publication Critical patent/JPH0444857B2/ja
Granted legal-status Critical Current

Links

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)
  • Detection And Prevention Of Errors In Transmission (AREA)

Description

【発明の詳細な説明】 （技術分野） 本発明は２回線以上の予備回線を持つ通信回線
の回線切替制御方式に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a line switching control system for a communication line having two or more protection lines.

（従来技術） 従来、２回線以上の予備回線を持つ通信回線の
切替制御系は、各予備回線毎に設けられた回線切
替制御部と１個の予備回線選択制御部とから構成
されている。この予備回線の選択制御は、各々の
予備回線切替制御部を順次選択して切替が行なわ
れたところの予備回線を選択するというものであ
つた。この制御において、予備回線が選択された
かどうかは各予備回線の回線切替制御部からの応
答があつたことにより判断されるため、予備回線
を選択するのに時間がかかるという欠点があつ
た。(Prior Art) Conventionally, a switching control system for a communication line having two or more protection lines includes a line switching control section provided for each protection line and one protection line selection control section. This protection line selection control involves sequentially selecting each protection line switching control unit to select the protection line to which switching has been performed. In this control, whether or not a protection line has been selected is determined based on a response from the line switching control section of each protection line, so there is a drawback that it takes time to select a protection line.

（発明の目的） 本発明の目的は、このような欠点を除き、予め
予備回線に順位をつけて優先順位の低い予備回
線、すなわち最も切替える可能性の高い予備回線
を最初に選ぶようにすることにより、予備選択動
作を繰返さなくとも直ちに切替動作に入ることが
出来、切替時間を短縮できる回線切替制御方式を
提供することにある。(Object of the Invention) The object of the present invention is to eliminate such drawbacks and to prioritize the protection lines in advance so that the protection line with the lowest priority, that is, the protection line with the highest possibility of switching is selected first. Therefore, it is an object of the present invention to provide a line switching control system that can immediately enter a switching operation without repeating the preliminary selection operation and shorten the switching time.

（発明の構成） 本発明の構成は、複数の現用回線および２回線
以上の予備回線をもつ通信回線を、回線切替要求
のあつたとき予備回線へ切替える回線切替制御方
式において、前記各予備回線をその予備回線の障
害状況および切替使用状況によつて切替優先順位
をつけ、前記各予備回線の切替優先順位を比較し
て最も優先順位が低く、使用される可能性の最も
高い予備回線を選択し、この選択された予備回線
の優先順位と前記回線切替要求の優先順位とを比
較してこの回線切替要求の優先順位の方が高いと
き、その予備回線へ切替可能と判定することを特
徴とする。(Structure of the Invention) The structure of the present invention provides a line switching control method for switching a communication line having a plurality of working lines and two or more protection lines to a protection line when a line switching request is received. A switching priority is assigned based on the failure status and switching usage status of the protection line, and the switching priority of each protection line is compared to select the protection line with the lowest priority and the highest possibility of being used. The priority of the selected protection line is compared with the priority of the line switching request, and if the line switching request has a higher priority, it is determined that switching to the protection line is possible. .

本発明においては、回線切替における自動切
替、手動切替、予備運用等の切替の優先順位を使
用中の予備回線に対してつけ、また使用していな
い予備回線に対しても正常および障害中に対し最
低および最高の優先順位をつけることにより予備
回線をランク付けし、最も切替の可能性の高いも
のを低優先順位となるようにする。ここで回線切
替要求があつたとき最低優先順位をつけられた予
備回線を最初に選択するようにし、さらに切替要
求の優先順位と選択された予備回線の優先順位と
を比較することにより、その予備回線が切替要求
に対して使用可能か否かをただちに判断できるよ
うにしている。この場合、切替要求が使用不可と
判断されたときはどの予備回線も使用不可という
ことであり、新たに予備選択動作を起こす必要も
なく要求の切替は行えないと判断できる。 In the present invention, switching priorities such as automatic switching, manual switching, and backup operation are assigned to backup lines that are in use, and protection lines that are not in use are also prioritized for normal and failure conditions. The protection lines are ranked by assigning the lowest and highest priority, and the one most likely to be switched is given a low priority. Here, when a line switching request is received, the protection line with the lowest priority is selected first, and the priority order of the switching request is compared with the priority of the selected protection line. It is possible to immediately determine whether the line can be used in response to a switching request. In this case, when it is determined that the switching request is unusable, it means that any protection line is unusable, and it can be determined that the request cannot be switched without the need to perform a new protection selection operation.

（実施例） 次に本発明を図面により詳細に説明する。(Example) Next, the present invention will be explained in detail with reference to the drawings.

第１図は本発明において回線切替制御される回
線の一例を示すブロツク図で、予備回線２回線と
現用回線３回線より構成された場合を示してい
る。図において、１，２は予備回線（以後SP１，
SP２という）、３，４，５は各々現用回線（以後
SYS１，SYS２，SYS３という）、６1，６2，６
３，７1，７2，７3は各々SP１，SP２用の送端並
列スイツチ、８1，８2，８3，９1，９2，９3は
各々SP１，SP２用の受端切替スイツチ、１０1〜
１０5は伝送路である。この現用回線SYS１を予
備回線SP１で切替える場合、予備回線（SP１）
切替制御部により指令されてSYS１の送端並列
スイツチ６1及び受端切替スイツチ８1が駆動さ
れ、またSYS１をSP２で切替える場合予備回線
（SP２）切替制御部により指令されて送端並列ス
イツチ７1及び受端切替スイツチ９1が駆動され
る。また、SYS２，３についても同様の切替が
行われる。 FIG. 1 is a block diagram showing an example of a line which is subject to line switching control in the present invention, and shows a case where the line is composed of two protection lines and three working lines. In the figure, 1 and 2 are protection lines (hereinafter SP1,
SP2), 3, 4, and 5 are the working lines (hereinafter referred to as
SYS1, SYS2, SYS3), 6 1 , 6 2 , 6
3 , 7 1 , 7 2 , 7 3 are sending end parallel switches for SP1 and SP2, respectively, and 8 1 , 8 2 , 8 3 , 9 1 , 9 2 , and 9 3 are receiving end switching switches for SP1 and SP2, respectively. , 10 1 ~
10 5 is a transmission path. When switching this working line SYS1 to the protection line SP1, the protection line (SP1)
The switching control section drives the sending end parallel switch 6 1 and the receiving end switching switch 8 1 of SYS1, and when switching SYS1 with SP2, the protection line (SP2) switching control section drives the sending end parallel switch 7. 1 and the receiving end changeover switch 91 are driven. Similar switching is also performed for SYS2 and SYS3.

第２図は本発明の実施例を説明する機能的ブロ
ツク図で、第１図の回線に本発明を適用した場合
に各回線と接続される回線切替制御部を示してい
る。図において、１１はデコーダ、１２はSP１
用回線切替制御部、１３はSP２用回線切替制御
部、１４は最低順位検出回路、１５は選択回路、
１６は比較回路、１７は切替要求信号、１８は要
求の切替の優先順位信号、１９，２０はSP１，
２の順位信号、２１はSP１又はSP２を表わすSP
番号信号、２２は選択された予備回線の順位信
号、２３は切替可又は不可を表わす切替信号、２
４，２５は各各SP１，SP２に対する切替要求信
号である。 FIG. 2 is a functional block diagram illustrating an embodiment of the present invention, showing a line switching control unit connected to each line when the present invention is applied to the line of FIG. 1. In the figure, 11 is a decoder, 12 is SP1
13 is a line switching control unit for SP2, 14 is a lowest rank detection circuit, 15 is a selection circuit,
16 is a comparison circuit, 17 is a switching request signal, 18 is a request switching priority signal, 19 and 20 are SP1,
2 rank signal, 21 is SP representing SP1 or SP2
number signal, 22 is a priority signal of the selected protection line, 23 is a switching signal indicating whether switching is possible or not, 2
4 and 25 are switching request signals for each of SP1 and SP2.

本発明においては、回線切替に優先順位をつけ
るが、この優先順位のつけ方について説明する。
この場合、切替られていない空きの予備回線には
一番低い優先順位、例えば「５」をつけ、予備回
線が障害中の場合には一番高い優先順位、例えば
「１」をつける、ことによつて予備回線を順位付
けする。また、予備回線への切替を行う場合にも
その切換方式の相異により予備回線と連続する一
連の順位をつけ、現用回線障害時予備回線へ切替
える自動切替、例えば「２」、人手により現用回
線を予備回線に切替える手動切替、例えば「３」、
予備回線を単独に使用する予備運用切替、例えば
「４」のように順位をつけるものとする。 In the present invention, line switching is prioritized, and the method of assigning this priority will be explained.
In this case, a free protection line that has not been switched is given the lowest priority, e.g., "5," and if the protection line is in failure, it is given the highest priority, e.g., "1." Accordingly, the protection lines are ranked. In addition, when switching to a protection line, depending on the switching method, a series of rankings are assigned that are consecutive to the protection line, and automatic switching is performed to switch to the protection line in the event of a failure of the working line. Manual switching to switch to the protection line, e.g. "3",
It is assumed that the protection operation switching which uses the protection line alone is ranked, for example, as "4".

従つて、予備回線の切替要求に対しては、自動
切替が最も優先され、手動切替、予備運用切替の
順になり、自動切替要求のあるときには手動切替
要求などがあつても自動切替が優先される。 Therefore, for protection line switching requests, automatic switching has the highest priority, followed by manual switching, then backup operation switching, and when there is an automatic switching request, automatic switching has priority even if there is a manual switching request etc. .

今、予備回線SP１が現用回線SYS１で切替中
で切替の優先順位が「１」であると仮定し、この
とき現用回線SYS２で優先順位「３」の手動切
替要求があつたときの動作について説明する。こ
こで予備回線SP２は切替中でないから、例えば
順位「５」とする。予備回線SP１から回線切替
制御部１２に順位信号１９として順位「１」が、
予備回線SP２から回線切替制御部１３に順位信
号２０に順位「５」が出力される。これらは最低
順位検出回路１４の比較回路で比較され順位の低
い予備回線SP２が選択されSP番号信号２１とし
て出力される。このSP番号信号を受けて選択回
路１５では予備回線SP２の順位「５」を選択信
号２２として出力する。 Now, assuming that the protection line SP1 is being switched to the working line SYS1 and the switching priority is "1", we will explain the operation when a manual switching request with the priority level "3" is received on the working line SYS2. do. Here, since the protection line SP2 is not being switched, it is given a rank of "5", for example. A ranking "1" is sent from the protection line SP1 to the line switching control unit 12 as a ranking signal 19.
A ranking "5" is output from the protection line SP2 to the line switching control unit 13 as the ranking signal 20. These are compared by the comparison circuit of the lowest rank detection circuit 14, and the protection line SP2 with the lowest rank is selected and outputted as the SP number signal 21. In response to this SP number signal, the selection circuit 15 outputs the rank "5" of the protection line SP2 as the selection signal 22.

一方、切替要求の優先順位信号１８は「３」で
あるから、順位信号１８（「３」）と選択信号２２
とを比較器１６にて比較する。この比較器１６の
出力となる切替信号２３は切替可能となり、切替
要求信号１７、SP番号信号２１とともにデコー
ダ１１入る。このデコーダ１１では、切替要求信
号１７と切替信号２３とが揃つたときにのみSP
番号信号２１をデコードし、切替要求信号２４又
は２５を出力するように構成されている。この場
合、予備回線SP２の回線切替制御部１３に対し
て切替要求信号２５を出力する。このSP２用回
線切替制御部１３はこの切替要求信号２５を受け
てSP２のスイツチ７1，９1を駆動して予備回線
SP２に切替える。 On the other hand, since the priority signal 18 of the switching request is "3", the priority signal 18 ("3") and the selection signal 22
The comparator 16 compares the two. The switching signal 23 output from the comparator 16 becomes switchable and enters the decoder 11 together with the switching request signal 17 and the SP number signal 21. This decoder 11 uses the SP only when the switching request signal 17 and the switching signal 23 are together.
It is configured to decode the number signal 21 and output a switching request signal 24 or 25. In this case, a switching request signal 25 is output to the line switching control unit 13 of the protection line SP2. The line switching control unit 13 for SP2 receives this switching request signal 25 and drives the switches 7 1 and 9 1 of SP2 to switch to the backup line.
Switch to SP2.

このように本発明を用いた場合、切替前の各予
備回線の状態のみで、最も切替える可能性の高い
予備回線を選ぶ事ができ、切替の応答を待つ必要
がなくそれだけ切替に要する時間を短かくでき
る。 When the present invention is used in this way, it is possible to select the protection line with the highest possibility of switching based only on the state of each protection line before switching, and there is no need to wait for a response to switching, which reduces the time required for switching. You can do this.

（発明の効果） 本発明は、以上説明したように、複数の予備回
線の各々に切替状態、障害状況により順位付けを
行い、新たに発生した切替要求に対して予備回線
として最も優先順位の低いものを選ぶことによ
り、予備回線選択を一度で行なえるようにして回
線切替に要する時間を短縮したものである。この
時間短縮は予備回線の数が多くなる程効果が大き
い。(Effects of the Invention) As explained above, the present invention ranks each of a plurality of protection lines according to their switching status and failure status, and selects the protection line with the lowest priority as a protection line in response to a newly generated switching request. This reduces the time required for line switching by making it possible to select a backup line in one go. This time reduction becomes more effective as the number of protection lines increases.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明により回線切替制御される回線
構成の一例を示すブロツク図、第２図は本発明の
実施例を説明する機能ブロツク図である。 図において、１，２……予備回線（SP１，SP
２）、３，４，５……現用回線（SYS１，SYS
２，SYS３）、６1，６2，６3，７1，７2，７3……
SP１，SP２用の送端並列スイツチ、８1，８2，
８3，９1，９2，９3……SP１，SP２用の受端切
替スイツチ、１０1〜１０5……伝送路、１１……
デコーダ、１２，１３……SP１，SP２用の回線
切替制御部、１４……最低順位検出回路、１５…
…選択回路、１６……比較回路、１７……切替要
求信号、１８……切替の優先順位信号、１９，２
０……SP１，SP２の順位信号、２３……切替信
号、２４，２５……SP１，SP２に対する切替要
求信号、である。 FIG. 1 is a block diagram showing an example of a line configuration subject to line switching control according to the present invention, and FIG. 2 is a functional block diagram illustrating an embodiment of the present invention. In the figure, 1, 2...protection lines (SP1, SP
2), 3, 4, 5...Working line (SYS1, SYS
2, SYS3), 6 1 , 6 2 , 6 3 , 7 1 , 7 2 , 7 3 ...
Sending end parallel switch for SP1 and SP2, 8 1 , 8 2 ,
8 3 , 9 1 , 9 2 , 9 3 ...Receiving end changeover switch for SP1 and SP2, 10 1 to 10 5 ...Transmission line, 11...
Decoder, 12, 13... Line switching control unit for SP1 and SP2, 14... Lowest rank detection circuit, 15...
...Selection circuit, 16...Comparison circuit, 17...Switching request signal, 18...Switching priority signal, 19,2
0... Ranking signal for SP1 and SP2, 23... Switching signal, 24, 25... Switching request signal for SP1 and SP2.

Claims (1)

【特許請求の範囲】[Claims] １ 複数の現用回線および２回線以上の予備回線
をもつ通信回線を、回線切替要求のあつたとき予
備回線へ切替える回線切替制御方式において、前
記各予備回線にはその予備回線の障害状況および
切替使用状況によつて前記回線切替要求には切替
方式の相異によつて、前記予備回線および前記回
線切替要求に一連の優先順位をつけ、前記各予備
回線の切替優先順位を比較して最も優先順位が低
く、使用される可能性の最も高い予備回線を選択
し、この選択された予備回線の優先順位と前記回
線切替要求の優先順位とを比較してこの回線切替
要求の優先順位の方が高いとき、その予備回線へ
切替可能と判定することを特徴とする回線切替制
御方式。1. In a line switching control method in which a communication line with multiple working lines and two or more protection lines is switched to a protection line when a line switching request is received, each of the protection lines has information on the failure status of the protection line and its switching usage. Depending on the situation, the line switching request may be given a series of priorities depending on the switching method, and the protection line and the line switching request may be given a series of priorities, and the switching priority of each protection line may be compared to determine the highest priority. selects a protection line with a low probability of being used, and compares the priority of the selected protection line with the priority of the line switching request and determines that the priority of this line switching request is higher. A line switching control method characterized in that it is determined that switching to the protection line is possible when the line is switched to the backup line.
JP5385884A 1984-03-21 1984-03-21 Circuit switching controlling system Granted JPS60197041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5385884A JPS60197041A (en) 1984-03-21 1984-03-21 Circuit switching controlling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5385884A JPS60197041A (en) 1984-03-21 1984-03-21 Circuit switching controlling system

Publications (2)

Publication Number Publication Date
JPS60197041A JPS60197041A (en) 1985-10-05
JPH0444857B2 true JPH0444857B2 (en) 1992-07-23

Family

ID=12954471

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5385884A Granted JPS60197041A (en) 1984-03-21 1984-03-21 Circuit switching controlling system

Country Status (1)

Country Link
JP (1) JPS60197041A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960015347B1 (en) * 1990-09-10 1996-11-09 후지쓰 가부시끼가이샤 Semiconductor device
CN100463373C (en) * 2003-01-17 2009-02-18 中兴通讯股份有限公司 Centralized control and hierarchical implementing switching control method and device
JP2006262275A (en) * 2005-03-18 2006-09-28 Nec Corp Transceiver, optical transmission apparatus, switching method by port, program, and recording medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5186309A (en) * 1975-01-27 1976-07-28 Tokyo Shibaura Electric Co
JPS55154836A (en) * 1979-05-22 1980-12-02 Nec Corp Automatic switching control system for radio communication circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5186309A (en) * 1975-01-27 1976-07-28 Tokyo Shibaura Electric Co
JPS55154836A (en) * 1979-05-22 1980-12-02 Nec Corp Automatic switching control system for radio communication circuit

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