CN101043288B - Optical multiplexing layer power optimization system and method thereof - Google Patents

Abstract

The invention discloses a light multiplexing layer power optimizing system and method. The system includes a monitoring module for monitoring the input and output power of a light amplifier; a control module for controlling and inquiring the monitoring module; an executing module corresponding to the light amplifier and a light attenuator; in which the three modules are connected via a network managing system or a signaling system. The method comprises the following steps: firstly inquiring the input and output power of each light amplifier, then calculating adjustment values corresponding to each light amplifier and the light attenuator according to the inquired input and output power of the light amplifier, according to the calculated adjustment values, when the gain attenuation sum of a light transmission section is to be increased, firstly reducing the attenuation of the light attenuator, then increasing the gain of the light amplifier; when the gain attenuation sum of the light transmission section is to be reduced, firstly reducing the gain of the light amplifier, then increasing the attenuation of the light attenuator. The using the method of the invention can optimize the power of light multiplexing layer gently, and guarantee the running of inerrability during the cause of optimization.

Description

Optical multiplexing layer power optimization system and method thereof

technical field

The invention relates to a wavelength division multiplexing transmission system in the communication field, in particular to an optical multiplexing layer power optimization system and a method thereof.

Background technique

The basic wavelength division multiplexing (WDM, Wavelength Division Multiplex) transmission system consists of optical transponder (OTU, Optical Transponder Unit), optical multiplexer (OMU, Optical Multiplexer Unit), optical amplifier (OA, Optical Amplifier), line fiber, optical Optical Demultiplexer Unit (ODU, Optical Demultiplexer Unit). The output from the OMU to the input of the ODU is the Optical Multiplex Section (OMS, Optical Multiplex Section). The output of the previous OA to the input of the next OA is the optical transmission section (OTS, Optical Transmission Section).

The purpose of OMS power optimization in the optical multiplexing section of the wavelength division multiplexing transmission system is to maintain the output optical power at a certain value. Usually, during the engineering debugging of the wavelength division multiplexing transmission system, an appropriate variable optical attenuator (VOA, Variable Optical Attenuator) can be added between the OMU and the OA to make the beginning of the system output normal optical power, which is the optical multiplexing section Baseline power for OMS power optimization. The gain of other OAs in the wavelength division multiplexing transmission system is determined according to the loss of the line fiber, and its gain matches the loss of the line fiber, so that the optical power of the multiplexing layer of the system can be maintained at the reference value.

In the actual operation of the wavelength division multiplexing transmission system, the optical fiber connection in the equipment room is used between the OMU and the OA, and the loss is not easy to change, so there is no need to consider it in the automatic power optimization of the multiplexing layer. However, due to the influence of temperature, construction and other factors, the loss of the line fiber will change. Effective measures must be taken to compensate for the change in the loss of the line fiber, so that the gain and loss can be matched, so that the optical power can be maintained at the reference value.

In order to automatically adjust the change of the line loss online, there are usually two methods, one is to increase the VOA between the line fiber and the OA, and the other is to make the gain of the OA adjustable within a certain range. When the loss of the line fiber changes, the attenuation of the VOA or the gain of the OA is adjusted online to match the gain and loss of the system and ensure that the OMS optical power of the optical multiplexing section of the system is maintained at an optimal state.

The existing optimization method is based on the network element level. The advantage of this network element level optimization method is that it is easy to adjust. The disadvantage is that it is not easy to obtain the overall situation of the gain and loss of each node in the OMS in the optical multiplexing section, so it cannot be realized automatically. Overall optimization of OMS power in optical multiplexing section.

Because this network element-level optimization method is node-by-node optimization according to the flow direction of the service, although this method can narrow the adjustable range, it still cannot avoid the error phenomenon that may occur during the optimization process.

The technical problem to be solved by the present invention is to provide an optical multiplexing layer power optimization system and its method, so as to overcome the error phenomenon that may occur during the optimization process.

The present invention provides an optical multiplexing layer power optimization system, which is used for the optical multiplexing section of the wavelength division multiplexing transmission system, and the optical multiplexing section includes a wavelength converter, an optical multiplexer, an optical amplifier, An optical splitter and an optical attenuator form at least one optical transmission section, and the optimization system includes:

A monitoring module, corresponding to the optical amplifier, for monitoring the input and output power of the optical amplifier;

A control module, corresponding to the management plane or control plane, is used to control and query the monitoring module, and calculate the gain attenuation and , and the principle of attenuating the gain of the optical multiplexing section and tending to zero, the principle of making the output optical power of each optical amplifier tend to a preset target value, or making the line loss of each optical transmission section tend to a preset target Based on the principle, calculate the adjustment value corresponding to each optical amplifier and optical attenuator;

The execution module corresponds to the optical amplifier and the optical attenuator, and is used to adjust each optical amplifier and optical attenuator according to the adjustment value calculated by the control module. When the gain-attenuation sum of the optical transmission section is to be increased, the Reduce the attenuation of the optical attenuator, and then increase the gain of the optical amplifier; when you want to reduce the gain attenuation sum of the optical transmission section, first reduce the gain of the optical amplifier, and then increase the attenuation of the optical attenuator;

Wherein, the control module, execution module and monitoring module are connected through a network management system or a signaling system.

The present invention further provides an optical multiplexing layer power optimization method for an optical multiplexing section of a wavelength division multiplexing transmission system, wherein the optical multiplexing section includes a wavelength converter, an optical multiplexer, and an optical amplifier under the control of a management plane or a control plane , an optical demultiplexer, and an optical attenuator form at least one optical transmission section, and the optimization method includes the following steps:

(1) Monitor the line status, query the input and output power of each optical amplifier;

(2) Calculate the gain attenuation sum of each optical transmission section in the optical multiplexing section according to the input and output power of the optical amplifier found in the query, and the principle of making the gain attenuation sum of the optical multiplexing section tend to zero, using The principle that the output optical power of each optical amplifier tends to the preset target value or the principle of making the line loss of each optical transmission section tend to the preset target is the principle to calculate the adjustment value corresponding to each optical amplifier and optical attenuator;

(3) Perform adjustment of each optical amplifier and optical attenuator according to the calculated adjustment value.

Wherein, described step (2) can be realized by following step calculation:

(A) calculate the gain attenuation sum of each optical transmission section in the optical multiplexing section according to the input and output power of the optical amplifier monitored;

(B) Based on the principle of making the gain attenuation and tending to zero, according to the adjustable range of the optical amplifier and the optical attenuator, obtain the attainable value of the gain attenuation sum of each optical transmission section;

(C) Calculate the deviation adjustment value assigned to the previous optical transmission section or the subsequent optical transmission section according to the difference between the attainable value and zero;

(D) adding the attainable value of the gain attenuation sum of each optical transmission section to the assigned deviation adjustment value to obtain the target value of the gain attenuation sum of each optical transmission section;

(E) Calculating adjustment values that should be allocated to each optical amplifier and optical attenuator based on the calculated target value.

Wherein, the step (C) includes: when the attainable value is greater than zero, calculate the deviation adjustment value allocated to the previous optical transmission segment; The offset value of the optical transmission section.

Wherein, said step (E) may comprise the steps of:

(E1) subdividing the calculated target value into small adjustment amounts with a certain step size;

(E2) Before the subdivided small adjustment amount is issued and executed, after the corresponding optical amplifier or optical attenuator is judged to execute the small adjustment amount, the output light of the last stage optical amplifier in the optical multiplexing section Whether the power exceeds the range;

(E3) According to the judgment result, if the range is exceeded, the delivery of the small adjustment amount is not scheduled to be executed; After the judgment of the adjustment amount is completed, the small adjustment amount of the next optical amplifier or optical attenuator is judged according to the business flow direction. After the current small adjustment amount is judged for one round, the next round of the small adjustment amount that has not been arranged is carried out according to the business flow direction. The judgment of each optical amplifier or optical attenuator to obtain the execution sequence of each small adjustment amount that should be executed.

The invention realizes the optimization of the wavelength division multiplexing equipment, can gradually optimize the optical power gently, and can effectively ensure that the system runs without code errors during the optimization process.

1 is a schematic diagram of an optical multiplexing section of a wavelength division multiplexing transmission system according to an embodiment of the present invention;

Description of drawings

Fig. 2 is a schematic flow chart of the optical multiplexing layer power optimization method of the present invention;

Fig. 3 is a schematic diagram of an optimization method according to an embodiment of the present invention;

Fig. 4 is a wavelength division multiplexing transmission system with three optical transmission sections according to an embodiment of the present invention.

As shown in Figure 1, it is a schematic diagram of the optical multiplexing section OMS of the wavelength division multiplexing transmission system, which is controlled by the wavelength converter OTU, optical multiplexer OMU, optical amplifier OA, optical demultiplexer ODU, adjustable optical attenuator VOA and plane or management plane.

Detailed ways

In view of the application environment in Fig. 1, the power optimization system for the optical multiplexing layer of the present invention may consist of a monitoring module, a control module, and an execution module as a whole, and they are connected through a network management system or a signaling system. in:

A monitoring module, corresponding to the optical amplifier, for monitoring the input and output power of the optical amplifier;

A control module, corresponding to the management plane or control plane, is used to control and query the monitoring module, according to the input and output power of the optical amplifier monitored by the monitoring module, and to attenuate the gain of the optical multiplexing section and tend to zero The principle of making the output optical power of each optical amplifier tend to the preset target value or the principle of making the line loss of each optical transmission section tend to the preset target is the principle, and calculate the corresponding optical amplifier and optical attenuator adjustment value;

The execution module corresponds to the optical amplifier and the optical attenuator, and is used to adjust each optical amplifier and optical attenuator according to the adjustment value calculated by the control module. When the gain-attenuation sum of the optical transmission section is to be increased, the Reduce the attenuation of the optical attenuator, and then increase the gain of the optical amplifier; when you want to reduce the gain attenuation sum of the optical transmission section, first reduce the gain of the optical amplifier, and then increase the attenuation of the optical attenuator.

Wherein, the control module may include:

The gain attenuation and calculation module is used to calculate the gain attenuation sum of each optical transmission section in the optical multiplexing section according to the monitored input and output power of the optical amplifier;

The attainable value calculation module is used to obtain the attainable value of the gain attenuation sum of each optical transmission section according to the adjustable range of the optical amplifier and the optical attenuator according to the principle of making the gain attenuation sum tend to zero;

The deviation adjustment value calculation module is used to calculate the deviation adjustment value assigned to the previous optical transmission section or the subsequent optical transmission section according to the difference between the attainable value and zero;

The target value calculation module is used to add the attainable value of the gain-attenuation sum of each optical transmission section to the assigned deviation adjustment value to obtain the target value of the gain-attenuation sum of each optical transmission section;

The adjustment amount allocation module is used to calculate the adjustment value that should be allocated to each optical amplifier and optical attenuator according to the calculated target value.

Wherein, the deviation adjustment value calculation module calculates the deviation adjustment value assigned to the previous optical transmission section when the attainable value is greater than zero; segment offset value.

Wherein, the adjustment amount distribution module may include:

A step size subdivision module, configured to subdivide the calculated target value into small adjustments with a certain step size, and send it to the corresponding execution module;

The range judging module is used to judge whether the output optical power of the last stage optical amplifier in the optical multiplexing section exceeds the range after the corresponding execution module executes the small adjustment amount before the subdivided small adjustment amount is issued. ;

The order adjustment module is used to arrange the issuance of the small adjustment amount if it exceeds the range according to the judgment result of the range judgment module, and arrange the issuance of the small adjustment amount if it does not exceed the range, and execute After the judgment of the small adjustment amount corresponding to the module is completed, the small adjustment amount of the next execution module is judged according to the business flow direction. The next round of judgment is carried out, thereby obtaining the delivery sequence of the small adjustments that should be executed by each execution module.

As shown in Figure 2, it is a schematic flow chart of the power optimization method described in the present invention, at first, monitor line state, inquire about the input and output power (step 201) of each optical amplifier; Calculate the adjustment value corresponding to each optical amplifier and optical attenuator for the output power (step 202); finally, dynamically adjust each optical amplifier and optical attenuator according to the calculated adjustment value (step 203).

Wherein, in the step 201, during the performance query, the control module can monitor the line state, query the input and output power of each optical amplifier, and the result obtained by the control module according to the current state of the monitoring module is used for the calculation of the next step .

In the step 202, according to the input and output power of the optical amplifier, there are many ways to calculate the adjustment value of each optical amplifier and optical attenuator, and three embodiments are given below:

First embodiment:

First, the control module calculates the gain and loss of each OTS section of the optical multiplexing section OMS according to the current state of the monitoring module, and uses the loss as a negative gain to calculate the sum of the gain and loss, which is the sum of gain attenuation.

Next, the target value of the gain attenuation sum of the OTS section is judged: the sum of the gain attenuation sums of each OTS section is the gain attenuation sum of the OMS section. Based on the principle that the gain attenuation sum tends to zero, according to the adjustable range of the optical amplifier and optical attenuator, the closest value of the gain attenuation sum of each OTS section to zero can be obtained, that is, the attainable value of the gain attenuation sum. When the achievable value of the gain attenuation sum of the OTS section is greater than zero, adjust the deviation according to the gain attenuation sum of the previous OTS section of the service flow to optimize the entire OMS section; when the achievable value of the gain attenuation sum of the OTS section is less than zero, adjust the deviation According to the gain and attenuation sum of the OTS section behind the service flow, the entire OMS section is optimized, and according to the difference between the reachable value and zero, calculate the offset adjustment value assigned to the previous optical transmission section or the next optical transmission section, each The attainable value of the gain attenuation sum of the OTS section is added to the offset adjustment value of the gain attenuation sum assigned to the OTS by other OTS sections to obtain the target value of the gain attenuation sum of each OTS section;

According to the calculated target value, the adjustment value that should be assigned to the execution module, that is, corresponding to each optical amplifier and optical attenuator, is calculated. The calculation process is as follows:

Firstly, in order to prevent excessive changes in the system optical power caused by the delivery of the entire large adjustment amount of the execution module, the adjustment amount of each execution module is subdivided by a certain step size, such as 0.5dB, so that the system output optical power gradually transitions to The final output optical power after optimization, the adjustment amount after subdivision is defined as the small adjustment amount.

Secondly, in the process of issuing the adjustment amount of the execution module, because the output optical power of the last OA of the OMS changes too much, the input optical power of the OTU at the receiving end exceeds the limit and a bit error occurs. Therefore, in the process of issuing the adjustment amount of the execution module, the OMS The output optical power of the last OA is required to be within a certain range, which is the output optical power range of the last OA of the OMS. This range is jointly determined by the current output optical power of the last OA in the multiplexing layer and the optical power range included in the optimized power to be obtained after the adjustments of each execution module are issued.

Finally, according to the business flow of the optical transmission system, judge the subdivided small adjustment amount of each execution module. If the adjustment amount will make the output optical power of the last OA of the OMS within the allowable range, then arrange the small adjustment amount. The distribution of the adjustment amount, otherwise, the distribution of the small adjustment amount will not be arranged. After judging a small adjustment amount of an execution module, judge a small adjustment amount of the next execution module according to the business flow. After one round of judging a small adjustment amount of each execution module, the next round of judging is performed on the small adjustment amount that has not yet been arranged according to the business flow direction. According to this method, the delivery sequence of each small adjustment amount of each execution module is obtained.

Second embodiment:

First, according to the monitored output power of the optical amplifier, calculate the difference between the current output power of each amplifier and the preset output power target value, where the target value can correspond to the first monitoring module of the optical multiplexing section Output optical power.

Then, according to the calculated difference, the adjustment value of each optical amplifier and optical attenuator is determined based on the principle that the output optical power of each optical amplifier tends to the target value.

Third embodiment:

First, according to the monitored input and output power of the optical amplifier, the difference between the current line loss value corresponding to each optical transmission section and the preset loss target value is calculated, wherein the target value can be set manually.

Then, according to the calculated difference, the adjustment value of each optical amplifier and optical attenuator is determined based on the principle that the line loss of each optical transmission section tends to the target value.

In the step 203, according to the adjustment value issued by the control module, when the gain attenuation sum of the optical transmission section is to be increased, the attenuation of the optical attenuator is first reduced, and then the gain of the optical amplifier is increased; When the gain attenuation sum of the optical transmission section, first reduce the gain of the optical amplifier, and then increase the attenuation of the optical attenuator.

As shown in Figure 3, it is a flowchart of the optimization method according to the embodiment of the present invention, including the following steps:

Step 301: first query the performance, and calculate the initial value and achievable value of the gain attenuation sum of the OTS section;

Step 302: judging whether the reachable value of the OTS section is zero, if zero, then enter step 303; if greater than zero, then enter step 304; if less than zero, then enter step 305;

Step 303: Do not adjust the gain attenuation sum of other OTS segments;

Step 304: adjust the gain attenuation sum of the previous OTS segment;

Step 305: Adjust the gain attenuation sum of the OTS segment behind the deviation;

Step 306: judge whether all OTS segments have been judged, if so, then enter step 308; if not, then enter step 307;

Step 307: judge the next OTS segment, enter step 302;

Step 308: according to the gain attenuation sum of each OTS section and the sum of the attainable value and other OTS sections assigned to the gain attenuation sum of the OTS section, obtain the target value of the gain attenuation sum of each OTS section;

Step 309: According to the initial value and the target value of the gain attenuation sum of the OTS section, judge whether to increase the gain attenuation sum of the OTS section, if so, then enter step 310; if it is decreased, then enter step 311; if not, then The adjustment amount of each execution module of the OTS section is constant (step 312);

Step 310: Allocate the adjustment amount of the execution module according to the following principle: first reduce the attenuation of VOA, and then increase the gain of OA;

Step 311: Allocate the adjustment amount of the execution module according to the following principles: first reduce the gain of OA, and then increase the attenuation of VOA;

Step 312: The adjustment amount of each execution module in the OTS segment remains unchanged;

Step 313: Judging whether all the OTS sections to be adjusted have been judged, if so, then enter step 315; if not, then enter step 314;

Step 314: judge the next OTS segment, enter step 309;

Step 315: Obtain the adjustment amount of each execution module;

Step 316: Subdividing the adjustment amount by 0.5dB step size, according to the current output optical power of the last OA in the multiplexing layer and the optical power range included in the optimized power to be obtained after the adjustment amount of each execution module is delivered, obtain The allowable range of the output optical power of the last OA of the OMS;

Step 317: Judging whether the adjustment of the small adjustment amount of the execution module will exceed the allowable range, if so, proceed to step 318; if not, proceed to step 319;

Step 318: Do not arrange adjustment for the time being, and put it in the next round for judgment;

Step 319: Obtain the adjustment order of the small adjustment amount;

Step 320: Judging whether the small adjustments of all the execution modules to be adjusted have been arranged in order, if so, go to step 322, if not, go to step 321;

Step 321: Judging the small adjustment amount of the next execution module, and proceeding to step 317;

Step 322: Obtain the adjustment order and issue it.

As shown in Figure 4, it is an embodiment of a wavelength division multiplexing transmission system with three optical transmission segments, the control module corresponds to the management plane or the control plane, and the monitoring modules corresponding to the OA0, OA1, OA2, and OA3 The modules corresponding to the OA0, OA1, OA2, OA3 and VOA1, VOA2, VOA3 are execution modules. Between OA0 and OA1 is an OTS segment, denoted as OTS#1. Between OA1 and OA2 is an OTS segment, denoted as OTS#2. Between OA2 and OA3 is an OTS segment, denoted as OTS#3. The monitoring amount of each monitoring module and the adjustment amount of each execution module are shown in the following table:

According to the method of the present invention, the target value of the gain attenuation sum of each optical transmission section OTS is obtained as shown in the following table: Optical Transport Segment (OTS) number Optimal final value of gain reduction sum (dB) OTS#1 0 OTS#2 0 OTS#3 0

According to the method of the present invention, the final value that should be adjusted to the execution module of each optical transmission section OTS is obtained as shown in the following table:

According to the method of the present invention, assuming that the adjustment step size of VOA is 0.5dB, the order of issuing the optimization results is as shown in the following table:

Referring to the embodiment of the present invention, the optical power of the optical multiplexing layer of the entire optical multiplexing section is optimized according to the optical power of the optical multiplexing layer of the entire optical multiplexing section OMS. The adjustment amount will be issued gradually, and the output optical power of the last OA in the optical multiplexing layer will be within a certain range during the issuing process, so that the optical power of the OMS in the optical multiplexing section can be gradually optimized smoothly. According to the allowable range of optical power in the adjustment process, technical measures such as judging the order of the adjustment amount to be issued can effectively ensure the error-free operation of the WDM transmission system during the optimization process.

Claims (12)

1. optical multiplexed layer power optimized system, the optical multiplexing section that is used for wave division multiplexing transmission system, described optical multiplexing section is included in wavelength shifter, optical multiplexer, image intensifer, optical branching filter, the optical attenuator under management plane or the control plane control, form at least one optical transmission section, it is characterized in that described optimization system comprises:

Monitoring modular corresponding to described image intensifer, is used to monitor input, the power output of image intensifer;

Control module, corresponding to described management plane or control plane, be used to control query said monitoring module, the input and output power of the image intensifer that arrives according to monitoring module monitors, calculate each optical transmission section in the optical multiplexing section gain reduction and, and the target that makes the gain reduction of described optical multiplexing section and the principle that goes to zero, makes the Output optical power of each image intensifer be tending towards the principle of preset target value or make the line loss of each optical transmission section be tending towards presetting is principle, calculates the adjusted value corresponding to each image intensifer and optical attenuator;

Executive Module corresponding to described image intensifer and optical attenuator, is used for the adjusted value that calculates according to control module, adjust each image intensifer and optical attenuator, desire increase this optical transmission section gain reduction and the time, reduce the decay of optical attenuator earlier, increase the gain of image intensifer again; The gain reduction of desiring to reduce this optical transmission section and the time, reduce the gain of image intensifer earlier, increase the decay of optical attenuator again,

Wherein, connect by network management system or signaling system between described control module, Executive Module, the monitoring modular.

2. optimization system as claimed in claim 1 is characterized in that, described control module comprises:

Gain reduction and computing module are used for the input and output power according to the image intensifer that monitors, calculate each optical transmission section in the optical multiplexing section gain reduction and;

Can reach the value computing module, be used for so that this gain reduction and the principle that goes to zero, according to the adjustable extent of image intensifer and optical attenuator, obtain each optical transmission section gain reduction and reached at value;

Tuningout value computing module is used for calculating the tuningout value of distributing to last optical transmission section or back one optical transmission section according to described value and the zero gap of reaching;

The desired value computing module, be used for the gain reduction of described each optical transmission section and reached at value and the tuningout value addition that is assigned with, obtain each optical transmission section gain reduction and desired value;

The adjustment amount distribution module is used for the desired value that calculates according to described, calculates the adjusted value that should distribute to each image intensifer and optical attenuator.

3. optimization system as claimed in claim 2 is characterized in that, described tuningout value computing module, when the described value that reaches greater than zero the time, dispensed is given the tuningout value of last optical transmission section; When the described value that reaches less than zero the time, dispensed is given the tuningout value of back one optical transmission section.

4. optimization system as claimed in claim 2 is characterized in that, described adjustment amount distribution module comprises:

Step-length segmentation module after being used for the described desired value of calculating is subdivided into little adjustment amount with certain step-length, is issued to corresponding Executive Module;

The scope judge module, before being used for little adjustment amount after described segmentation and issuing, judge that corresponding Executive Module is carried out this little adjustment amount after, whether overrun at the Output optical power of the afterbody image intensifer of this optical multiplexing section;

The sequential adjustment module, be used for judged result according to described scope judge module, if overrun, then do not arrange issuing of this little adjustment amount, if not super scope, then arrange issuing of this little adjustment amount, and after the judgement of the little adjustment amount of an Executive Module correspondence is finished, by service route the little adjustment amount of next Executive Module is judged, after the current little adjustment amount judgement one of each Executive Module is taken turns, the little adjustment amount of arranging is as yet carried out the judgement of next round by service route, obtain the transmitting sequence of each little adjustment amount that each Executive Module should carry out thus.

5. optimization system as claimed in claim 1 is characterized in that, described control module comprises:

The power difference calculating module is used for the power output according to the image intensifer that monitors, the difference between the present output power that calculates each amplifier and the power output desired value of presetting;

The adjustment calculation module is used for the difference calculated according to described, is principle so that the Output optical power of each image intensifer is tending towards this desired value, determines the adjusted value of each image intensifer and optical attenuator.

6. optimization system as claimed in claim 1 is characterized in that, described control module comprises:

The loss difference calculating module is used for the input and output power according to the image intensifer that monitors, calculates corresponding to the difference between the current line loss value of each optical transmission section and the shrink goals value of presetting;

The adjusted value determination module is used for the difference calculated according to described, is principle so that the line loss of each optical transmission section is tending towards this desired value, determines the adjusted value of each image intensifer and optical attenuator.

7. optical multiplexed layer power optimization method, the optical multiplexing section that is used for wave division multiplexing transmission system, described optical multiplexing section is included in wavelength shifter, optical multiplexer, image intensifer, optical branching filter, the optical attenuator under management plane or the control plane control, form at least one optical transmission section, it is characterized in that described optimization method comprises the steps:

(1) line status is monitored, inquire about the input and output power of each image intensifer;

(2) according to the input and output power of the described image intensifer that inquires, calculate each optical transmission section in the optical multiplexing section gain reduction and, and the target that makes the gain reduction of described optical multiplexing section and the principle that goes to zero, makes the Output optical power of each image intensifer be tending towards the principle of preset target value or make the line loss of each optical transmission section be tending towards presetting is principle, calculates the adjusted value corresponding to each image intensifer and optical attenuator;

(3) according to the described adjusted value that calculates, carry out the adjustment of each image intensifer and optical attenuator, desire increase this optical transmission section gain reduction and the time, reduce the decay of optical attenuator earlier, increase the gain of image intensifer again; The gain reduction of desiring to reduce this optical transmission section and the time, reduce the gain of image intensifer earlier, increase the decay of optical attenuator again.

8. optimization method as claimed in claim 7 is characterized in that, described step (2) comprising:

(A) according to the input and output power of the image intensifer that monitors, calculate each optical transmission section in the optical multiplexing section gain reduction and;

(B) so that this gain reduction and the principle that goes to zero, according to the adjustable extent of image intensifer and optical attenuator, obtain each optical transmission section gain reduction and reached at value;

(C) according to described value and the zero gap of reaching, calculate the tuningout value of distributing to last optical transmission section or back one optical transmission section;

(D) with the gain reduction of described each optical transmission section and reached at value and the tuningout value addition that is assigned with, obtain each optical transmission section gain reduction and desired value;

(E) according to the described desired value that calculates, calculate the adjusted value that to distribute to each image intensifer and optical attenuator.

9. optimization method as claimed in claim 8 is characterized in that, described step (C), when the described value that reaches greater than zero the time, calculate the tuningout value of distributing to last optical transmission section; When the described value that reaches less than zero the time, calculate the tuningout value of distributing to back one optical transmission section.

10. optimization method as claimed in claim 8 is characterized in that, described step (E) comprising:

(E1) the described desired value of calculating is subdivided into little adjustment amount with certain step-length;

(E2) before the little adjustment amount after described segmentation issues execution, judge that the image intensifer of described correspondence or optical attenuator are carried out this little adjustment amount after, whether overrun at the Output optical power of the afterbody image intensifer of this optical multiplexing section;

(E3) according to judged result, if overrun, then do not arrange the execution that issues of this little adjustment amount, if not super scope, then arrange issuing of this little adjustment amount, and after the judgement of the little adjustment amount of current image intensifer or optical attenuator correspondence is finished, by service route the little adjustment amount of next image intensifer or optical attenuator is judged, after current little adjustment amount judgement one is taken turns, the little adjustment amount of arranging is as yet carried out the judgement of next round by service route, obtain the execution sequence that issues of each little adjustment amount that each image intensifer or optical attenuator should carry out thus.

11. optimization method as claimed in claim 7 is characterized in that, described step (2) comprising:

(A1) according to the power output of the image intensifer that monitors, the difference between the present output power that calculates each amplifier and the power output desired value of presetting;

(B2) according to the described difference of calculating, be principle so that the Output optical power of each image intensifer is tending towards this desired value, determine the adjusted value of each image intensifer and optical attenuator.

12. optimization method as claimed in claim 7 is characterized in that, described step (2) comprising:

(A2), calculate corresponding to the difference between the current line loss value of each optical transmission section and the shrink goals value of presetting according to the input and output power of the image intensifer that monitors;

(B2) according to the described difference of calculating, be principle so that the line loss of each optical transmission section is tending towards this desired value, determine the adjusted value of each image intensifer and optical attenuator.

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