CN1713548A - Realization of automatic light shut off function for light transmitting network in circular synchronous digital system - Google Patents
Realization of automatic light shut off function for light transmitting network in circular synchronous digital system Download PDFInfo
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- CN1713548A CN1713548A CNA2004100092419A CN200410009241A CN1713548A CN 1713548 A CN1713548 A CN 1713548A CN A2004100092419 A CNA2004100092419 A CN A2004100092419A CN 200410009241 A CN200410009241 A CN 200410009241A CN 1713548 A CN1713548 A CN 1713548A
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Abstract
The method includes following steps: in software system of net element in optical transportation network, defines the instruction of error checking and correcting to implement automatic optical cut off; the administer makes junction configuration between net elements at building a net, and checks the alarm message at optical interface of net element. The optical interface of net element sends the cut off instruction to relevant net element; the relevant net element receives the instruction, and makes relevant optical interface operation according to the instruction. The invention uses instruction of error checking and correcting to inform the failure net element, and directly cut off the failure optical interface.
Description
Technical field
The present invention relates to the SDH (Synchronous Digital Hierarchy) optical transport network, particularly relate to a kind of method that automatically shuts down function at annular SDH (Synchronous Digital Hierarchy) optical transport network realization laser.
Background technology
Because laser has harm to human eye; therefore in the transmission network technology that with optical fiber is passage; requirement has the light safe functioning in transmitting net; promptly occurring that optical fiber damages or cut the time; need the equipment transmission of automatically closing laser in time; be ALS (automatic laser shutdown light automatically shuts down), be without prejudice with the protection human eye.
G.664 light safety realizes in the optical transfer network measure and requirement have been defined at ITU-T; at present general implementation method as shown in Figure 1; promptly detect certain light mouth signal and (LOS) time occurs losing when surpassing the thresholding time (500ms) at network element; the laser of cutting out Ben Guangkou sends; after this opposite end network element can detect LOS (dropout) alarm from receiving the light mouth; also behind 500ms, close the transmission of black out mouth, thereby reach the purpose of safeguard protection.
But above-mentioned implementation method mainly is to be used for point-to-point ALS function to realize; different protected modes when not considering SDH (Synchronous Digital Hierarchy SDH (Synchronous Digital Hierarchy)) equipment annular networking; and for the networking mode of annular; if adopt implementation method, can cause the problem of SDH ring protection disabler with a kind of ALS function.With two fine channel protection rings is example; shown in Fig. 2 A, 2B; system property is under the situation of two fine unidirectional path protection rings; business configuration is shown in Fig. 2 A; interior ring is active channel, and outer shroud is for the protection path, if optical fiber breaks down on the active channel of professional process; the business reception of network element can switch on the protection path optical fiber of another direction, as Fig. 2 B.If fault optical fiber is on the protection path, as shown in Figure 3A, then business should not switched.
If but adopt ALS function implementation method shown in Figure 1, under the failure condition shown in Fig. 3 A, the light mouth 342 of network element 340 can detect the LOS alarm, behind 500ms, close black out mouth 342 and send laser, can make the light mouth 331 of network element 330 detect the LOS alarm afterwards, the light mouth 331 of network element 330 can be closed the transmission laser behind 500ms equally, the transmission of the light mouth 342 of the light mouth 331 of network element 330 and network element 340 is at this moment all closed, the professional AC that former cause light mouth 331 directions receive on the network element 330 then from network element 310, light mouth 332 directions that are switched to network element 330 are received, the fiber-optic signal that so conveniently gets operate as normal is closed, caused unnecessary switching services, as Fig. 3 B, will influence the service feature on the SDH network.
This shows that current ALS implementation method has following defective: promptly under the looped network condition, can influence normal optical fiber, cause professional unnecessary the switching of SDH ring protection.
Summary of the invention
Technical problem to be solved by this invention provides the implementation method that light in a kind of annular SDH (Synchronous Digital Hierarchy) optical transfer network automatically shuts down function; solve prior art under the looped network condition; can influence normal optical fiber, cause the professional unnecessary problem of switching of SDH ring protection.
For achieving the above object, the invention provides the implementation method that light in a kind of annular SDH (Synchronous Digital Hierarchy) optical transfer network automatically shuts down function, its characteristics are, comprise the steps: step 1, in the software systems of the network element of SDH optical transport network, definition realizes that light automatically shuts down the error checking of function and corrects ECC (ECC:Error Checking and Correcting, error checking and correction) instruction; Step 2, webmaster carry out connecting between network element configuration when networking; Step 3, the warning information of detection network element light mouth; Step 4, described network element light mouth send described error checking and correct instruction to corresponding network element according to described warning information; Step 5, described corresponding network element inspection receive described error checking and correct instruction; Step 6, described corresponding network element carries out the operation of corresponding light mouth according to described error checking and correction instruction.
Above-mentioned method, its characteristics are, connect configuration between the network element in the described step 2 and comprise: determine the annexation between the network element in the annular optical transport network; Determine the to be connected light mouth corresponding relation of network element.
Above-mentioned method, its characteristics are that described step 4 further comprises: described network element light mouth finds out the corresponding light mouth of the corresponding network element that is connected with described network element light mouth according to the network element annexation; Judge whether described network element light mouth has loss of signal alarm, be then to send the error checking of closing described corresponding light mouth and correct instruction, otherwise send the error checking of opening described corresponding light mouth and correct instruction to described corresponding network element to described corresponding network element.
Above-mentioned method, its characteristics are that described step 6 further comprises: described corresponding light mouth is closed or opened to described corresponding network element according to described error checking and correction instruction of closing or opening corresponding light mouth.
Above-mentioned method, its characteristics be, described error checking of closing described corresponding light mouth is along be connected with the described corresponding network element reverse transmission of direction of described network element light mouth with correcting message.
Above-mentioned method, its characteristics are that described corresponding network element realizes opening or closing described corresponding network element light mouth by the laser that opens or closes described corresponding network element light mouth.
Technique effect of the present invention is:
Adopt the method for the invention; compared with prior art; owing to adopt between network element error checking and correct message and notify the fault network element, the directly measure that fault light mouth is closed, rather than this network element light mouth directly turn-offed; make under the situation of SDH equipment annular networking; when realizing the ALS function, the business that can not have influence on system transmits and defencive function, avoids business to carry out unnecessary switching; thereby the assurance equipment performance makes functions of the equipments more complete.
Further describe specific embodiments of the invention below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the G.664 realization schematic diagram of light safety function of ITU-T;
Fig. 2 A, 2B are the protection philosophy figure that SDH transmits net system two fine channel protection rings;
Fig. 3 A, 3B are the service conditions contrast schematic diagrames under the specific fault situation;
Fig. 4 is the realization schematic diagram of the inventive method;
Fig. 5 is the realization flow figure of the inventive method.
Embodiment
Fig. 1 has introduced the implementation method of ITU-T ALS function G.664, detect at the receiving terminal 121 of network element 120 that (process a) after LOS (dropout) alarm surpassed 500ms, can notify this network element transmitting terminal 122 (process b), cause the transmission laser to close (process c), the receiving terminal 111 of network element 110 can detect LOS alarm (process d) afterwards, after the LOS alarm continues 500ms, can cause the transmission laser of the transmitting terminal 112 of network element 110 to close (process e).Process is shown in a～e among the figure
Fig. 2 A, 2B have described the realization principle of SDH channel protection ring; Fig. 2 A is business configuration figure under the normal condition; Fig. 2 B is that 230 professional AC can switch to light mouth 232 directions from light mouth 231 directions at the acceptance point of 230 network elements from network element 210 to network element when 240 → 230 direction faults appearred in optical fiber between network element 230,240.
Fig. 3 A, 3B have described another kind of fiber failure situation in the channel protection ring; dispose under the condition shown in Fig. 2 A at regular traffic; when this moment occurring fiber failure as shown in Figure 3A, protect principle according to SDH, network element 310 and 330 professional receive direction can not switched.If according to ITU-T implementation method G.664, as mentioned before, then the result can be that the light mouth 342 of network element 340 and the light mouth 331 of network element 330 all can be closed the transmission laser, thereby cause encircling professional AC unnecessary switching takes place.
Fig. 4 has introduced realization principle of the present invention, detect light mouth 432 at network element 430 LOS when alarm arranged, by inquiry Home Network unit configuration information, the connection network element that obtains fault light mouth 432 is a network element 420, behind the light mouth 421 that its corresponding light mouth is a network element 420, network element 430 will be closed the instruction of the transmission laser of network element 420 light mouths 421 and be sent by ECC, the ECC instruction is sent to fault network element 420 by the other direction of ring, network element 420 is after receiving that closing black out mouth 421 sends the instruction of laser, close the transmission laser of black out mouth 421, close thereby make the light mouth 421 that has only network element 420 in the whole looped network send, promptly the fault network element is only closed the light mouth laser transmitting set that breaks down.
Fig. 5 has introduced realization flow figure of the present invention.Comprise the steps:
This programme utilizes the ECC message between network element to transmit the function command of ALS, pre-define two ECC instruction messages, article one, the laser transmission is closed in expression, article one, the laser transmission is opened in expression, also include message sink network element and operational light mouth in the command information, utilize the instruction of these two definition to finish the ALS function.
Transmit in the network at annular SDH, detect certain light mouth receive direction at network element and dropout (LOS) when alarm occur, to close laser instructions by the ECC instruction message and be sent to the fault network element along another direction of encircling, the light mouth laser transmitting set, the course of work such as the accompanying drawing 4 that make the fault network element only close to break down.Rather than the method for this network element laser transmitting set is directly closed in employing.Network element is analyzed all ECC message that receive simultaneously, if the operational order of ALS, then opens and closes the operation of laser accordingly according to command request.
With network element among Fig. 4 430 and network element 420 is example, and whole implement process is as follows:
Network element 430:
1) define the ECC instruction of expression ALS function in software systems, main information comprises: this network element network element number, light slogan and connect network element network element number and corresponding light slogan;
2) during networking by the good network element annexation of network management configuration, be example with Fig. 4, the light mouth 431 of network element 430 connects the light mouth 442 of network elements 440, the light mouth 432 of network element 430 connects the light mouth 421 of network elements 420;
3) detect network element light mouth warning information, find that the LOS alarm appears in 432 receptions of light mouth, light mouth 431 directions do not have the LOS alarm;
4) network element draws according to the annexation of network management configuration, and what light mouth 432 connected is the light mouth 421 of network element 420, then closes the transmission of black out mouth 421 along the direction notice network element 420 of 430-440-410-420 by ECC message; Equally, then open light mouth 442 by ECC message informing network element 440 according to disposing to such an extent that light-emitting window 431 connects is the light mouth 442 of network element 440;
5) detect the ECC message receive, normal because network element 430 sends optical fiber, will be to open light mouth 432 from the ECC message of network element 420, will be to open light mouth 431 from the ECC message of network element 440;
6) according to the instruction of ECC message, network element 430 is opened the transmission of light mouth 431, light mouth 432.
Network element 420:
1) define the ECC instruction of expression ALS function in software systems, main information comprises: this network element network element number, light slogan and connect network element network element number and corresponding light slogan;
2) during networking by the good network element annexation of network management configuration, as shown in Figure 4, the light mouth 421 of network element 420 connects the light mouth 432 of network elements 430, the light mouth 422 of network element 420 connects the light mouth 411 of network elements 410;
3) detect network element light mouth warning information, discovery light mouth 421 directions do not have the LOS alarm, and light mouth 422 directions do not have the LOS alarm;
4) network element draws according to the annexation of network management configuration, and what light mouth 421 connected is the light mouth 432 of network element 430, the then transmission of opening light mouth 432 by ECC message informing network element 430; Equally, then open light mouth 411 by ECC message informing network element 410 according to disposing to such an extent that light-emitting window 422 connects is the light mouth 411 of network element 410;
5) detecting the ECC message receive, will be to open light mouth 422 to send from the ECC message of network element 410, will be to close black out mouth 421 to send from the ECC message of network element 430;
6) according to the instruction of ECC message, network element 420 closes the transmission of black out mouth 421, the transmission of opening light mouth 422.
So just finished a complete ALS process.
In sum, the present invention utilizes annular SDH to transmit ECC instruction message transmission ALS instruction in the net system, realizes the function of SDH device A LS, is a kind of simple and effective ALS function implementation method.
The above is preferred embodiment of the present invention only, is not to be used for limiting practical range of the present invention; Every according to equivalence variation and modification that the present invention did, all contained by claim of the present invention.
Claims (6)
1, light automatically shuts down the implementation method of function in a kind of annular SDH (Synchronous Digital Hierarchy) optical transfer network, it is characterized in that, comprises the steps:
Step 1, in the software systems of the network element of SDH optical transport network, definition realizes that light automatically shuts down the error checking of function and corrects instruction;
Step 2, webmaster carry out connecting between network element configuration when networking;
Step 3, the warning information of detection network element light mouth;
Step 4, described network element light mouth send described error checking and correct instruction to corresponding network element according to described warning information;
Step 5, described corresponding network element inspection receive described error checking and correct instruction;
Step 6, described corresponding network element carries out the operation of corresponding light mouth according to described error checking and correction instruction.
2, method according to claim 1 is characterized in that, connects configuration between the network element in the described step 2 and comprises: determine the annexation between the network element in the annular optical transport network; Determine the to be connected light mouth corresponding relation of network element.
3, method according to claim 2 is characterized in that, described step 4 further comprises: described network element light mouth finds out the corresponding light mouth of the corresponding network element that is connected with described network element light mouth according to the network element annexation; Judge whether described network element light mouth has loss of signal alarm, be then to send the error checking of closing described corresponding light mouth and correct instruction, otherwise send the error checking of opening described corresponding light mouth and correct instruction to described corresponding network element to described corresponding network element.
4, method according to claim 3 is characterized in that, described step 6 further comprises: described corresponding light mouth is closed or opened to described corresponding network element according to described error checking and correction instruction of closing or opening corresponding light mouth.
5, method according to claim 3 is characterized in that, described ECC message of closing described corresponding light mouth is along be connected with the described corresponding network element reverse transmission of direction of described network element light mouth.
6, method according to claim 4 is characterized in that, described corresponding network element realizes opening or closing described corresponding network element light mouth by the laser that opens or closes described corresponding network element light mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100092419A CN1713548A (en) | 2004-06-22 | 2004-06-22 | Realization of automatic light shut off function for light transmitting network in circular synchronous digital system |
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| CNA2004100092419A CN1713548A (en) | 2004-06-22 | 2004-06-22 | Realization of automatic light shut off function for light transmitting network in circular synchronous digital system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011000181A1 (en) * | 2009-07-02 | 2011-01-06 | 中兴通讯股份有限公司 | Method and device for processing failure of multi-span working channel in ring optical transmission network |
| CN102064880A (en) * | 2009-11-13 | 2011-05-18 | 中兴通讯股份有限公司 | Radio frequency remote module and power amplifier protection method thereof |
| CN101345597B (en) * | 2008-08-12 | 2012-11-28 | 中兴通讯股份有限公司 | Method and apparatus for implementing automatic laser cut-out of synchronization digital system equipment |
-
2004
- 2004-06-22 CN CNA2004100092419A patent/CN1713548A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345597B (en) * | 2008-08-12 | 2012-11-28 | 中兴通讯股份有限公司 | Method and apparatus for implementing automatic laser cut-out of synchronization digital system equipment |
| WO2011000181A1 (en) * | 2009-07-02 | 2011-01-06 | 中兴通讯股份有限公司 | Method and device for processing failure of multi-span working channel in ring optical transmission network |
| CN101599798B (en) * | 2009-07-02 | 2012-10-10 | 中兴通讯股份有限公司 | Method and device for processing multi-span section working channel fault in annular optical transport network |
| US8755686B2 (en) | 2009-07-02 | 2014-06-17 | Zte Corporation | Method and device for processing failure of multi-span working channel in ring optical transmission network |
| CN102064880A (en) * | 2009-11-13 | 2011-05-18 | 中兴通讯股份有限公司 | Radio frequency remote module and power amplifier protection method thereof |
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