CN100505591C - Optical add-drop multiplexer ring network multiplex section power optimizing method and its system - Google Patents
Optical add-drop multiplexer ring network multiplex section power optimizing method and its system Download PDFInfo
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Abstract
The invention discloses an OADM looped network multiplexing section power optimization method and system, which is characterized by the following: every element location consists of VOA and OA which connect to upstream optical section; the OA connects downstream optical section; every element location connects control device. The invention comprises the following methods: monitoring whether looped network state satisfies constraint condition; making sure of the adjusting OA and VOA and regulating variable according to the gain reduction of optical section, looped network total gain reduction, differences of respective constraint condition if the looped network state doesn't satisfy the constraint condition, variable range of optical section downstream node corresponding OA and OVA; making looped network total gain reduction satisfy the constraint condition; executing adjusting OA and OVA and regulating variable; optimizing looped network.
Description
Technical field
The present invention relates to the WDM optical transmission device of the communications field, relate in particular to a kind of method and system that OADM (optical add/drop multiplexer) ring network multiplex section is carried out power optimization.
Background technology
At the wdm system that the city optical transfer network is used, extensively adopt OADM equipment to constitute the OADM looped network.The gain of OADM looped network and loss comprise the gain of gain, fibre circuit loss and downstream node OA of loss, the upstream node OA (image intensifer) of intranodal OADM device.Wherein, the loss of the gain compensation intranodal OADM device of upstream node OA, the OADM device loss is stable, therefore can adjust upstream node OA gain compensation OADM device loss when equipment debugging, need not consider to change in equipment operation.Like this, in equipment operation, the gain of looped network and the variation of loss are mainly by the variation decision of the gain of fibre circuit loss and downstream node OA.
When changing (aging, temperature etc.) in the fibre circuit condition, deviate will take place in line loss, and the gain of looped network may be greater than loss, also may be less than loss.
Too small when looped network gain and loss ratio, OSNR of looped network (Optical Signal To Noise Ratio) and luminous power are with deterioration, and under limiting case, system will produce error code.
In the OADM looped network; what have the bandwidth of wavelength, idle wavelength or OADM device of protection and centre wavelength inconsistently causes a part of wavelength to leak (inconsistent as the bandwidth of band stop filter and band pass filter, centre wavelength; place, road under band stop filter; be positioned at outside the bandwidth of band stop filter, but still the wavelength that is positioned at the bandwidth of band pass filter will leak).These wavelength are straight-through at the each point of looped network, form loop by OADM device, image intensifer and fiber transmission link, when the overall gain of loop during greater than total losses, the noise of image intensifer constantly amplifies in network, just self-oscillation may be formed, network work will be had a strong impact on.In the OADM looped network as shown in Figure 1, the wavelength straight-through at each point will form a loop in looped network, and as if the total losses of the overall gain that is formed by image intensifer greater than fibre circuit and OADM intra-node, network may produce self-excitation.
Therefore, when in the OADM looped network, changing (aging, temperature etc.) in the fibre circuit condition, power that must control OADM looped network optical multiplexing section (OMS) makes the gain of looped network and loss control in suitable scope.
At present, have and avoid the OADM looped network to produce the method and apparatus of self-excitation individually, the power optimization method that is based upon the NE-level on the link is also arranged, but do not see luminous power by the control looped network, both suppressed the looped network self-excitation, made the gain and the method for loss in OK range of looped network again.
Summary of the invention
The problem that the present invention solves provides a kind of optical add-drop multiplexer ring network multiplex section power optimizing method and system thereof, both can avoid the deterioration of the OSNR and the power of looped network, can prevent that again looped network from producing self-excitation.
In order to solve the problems of the technologies described above, the invention provides a kind of optical add-drop multiplexer ring network multiplex section power optimizing method, being applied to each optical multiplexing section upstream node has corresponding image intensifer OA, and downstream node has the system of corresponding OA and optical attenuator VOA, and this method may further comprise the steps:
(a) the input and output power of amplifier in monitoring looped network each network element, calculate each optical multiplexing section gain reduction and and the decay of looped network overall gain and;
(b) judge each optical multiplexing section calculate gain reduction and and looped network overall gain decay and whether within the scope of looped network constraints regulation, if satisfy, execution in step (a), otherwise, execution in step (c);
(c) according to the gain reduction of each optical multiplexing section and and the decay of looped network overall gain and with the difference of constraints separately, and the adjustable range of corresponding OA of optical multiplexing section downstream node and VOA, determine OA and VOA and the regulated quantity thereof that to regulate, make looped network overall gain decay and satisfy constraints;
(d) OA that will adjust and VOA and regulated quantity thereof issue execution, and looped network is optimized.
Further, said method also can have following characteristics: calculate in the described step (a) certain optical multiplexing section gain reduction and the time, it is the input optical power that the Output optical power of the corresponding OA of this optical multiplexing section upstream node that will monitor deducts the corresponding OA of its downstream node, add that the gain of the corresponding OA of its downstream node obtains, or deduct with the Output optical power of the corresponding OA of its downstream node that the Output optical power of its upstream node correspondence OA obtains; The looped network overall gain decays and each optical multiplexing section gain reduction of looped network and addition is obtained.
Further, said method also can have following characteristics: in the described step (b) in the looped network constraints to the gain reduction and the M of each optical multiplexing section
iRequirement be: C1≤M
i≤ 0; Requirement to decay of looped network overall gain and M is: C2≤M＜0; Wherein, C1 and C2 for default less than 0 constant, more preferential to the requirement of decay of looped network overall gain and M.
Further, said method also can have following characteristics: described step (c) further may further comprise the steps:
(c1) according to the adjustable range of corresponding OA of optical multiplexing section downstream node and VOA, calculate each and do not satisfy the optical multiplexing section gain reduction of constraints and reached at the value that approaches an established standards value most that can reach;
(c2) each the optical multiplexing section gain reduction that will adjust and reached at value and each the optical multiplexing section gain reduction that need not to adjust and the detected value addition, with looped network overall gain decay and constraints relatively, as satisfy condition, then reach the end value that value is gain reduction of corresponding light multiplex section and adjustment with described, execution in step (c4), as not satisfying condition execution in step (c3);
(c3) to each optical multiplexing section gain reduction of looped network and reached at value or detected value finely tune, make looped network overall gain decay and satisfy constraints, and with the end value of the value after the fine setting as each optical multiplexing section gain reduction and adjustment;
(c4) with each optical multiplexing section gain reduction and currency and end value poor, promptly regulated quantity is distributed to the OA and/or the VOA of its downstream node correspondence, finishes.
Further, said method also can have following characteristics: the standard value in the described step (c1) is to select in the scope of optical multiplexing section gain reduction and constraints regulation.
Further, said method also can have following characteristics: described step (c1) is further divided into following steps:
(c11) be initial network element with certain network element, begin to handle, judge its gain reduction successively and whether satisfy constraints, when finding first optical multiplexing section that does not satisfy constraints, carry out next step from first optical multiplexing section;
(c12) according to the adjustable range of corresponding OA of current optical multiplexing section downstream node and VOA, in the constraints prescribed limit, select a standard value, reached at the value that approaches this standard value most that calculates this optical multiplexing section gain reduction and can reach;
(c13) judge this optical multiplexing section gain reduction and M
iReached at value whether satisfy constraints: C1≤M
i≤ 0, if satisfy execution in step (c17), otherwise execution in step (c14);
(c14) judge the gain reduction and the M of this optical multiplexing section
iReached at value whether greater than zero, if, execution in step (c15), otherwise, execution in step (c16);
(c15), will approach M most in the constraints prescribed limit if the upstream optical multiplexing section also is untreated
iValue deduct difference that current optical multiplexing section Mi can reach value as deviate, be assigned to this upstream optical multiplexing section, execution in step (c17);
(c16), will approach M most in the constraints prescribed limit if the downstream optical multiplexing section also is untreated
iValue deduct current optical multiplexing section M
iThe difference that can reach value is assigned to this downstream optical multiplexing section as deviate;
(c17) judge whether each optical multiplexing section of looped network is handled, if, execution in step (c2), otherwise, be current multiplex section with next optical multiplexing section, execution in step (c18);
(c18) judge whether current optical multiplexing section is assigned deviate, if have, then the tuningout value sum of distributing with other optical multiplexing section is a standard value, reached at the value that approaches this standard value most of calculating this optical multiplexing section gain reduction and can reaching, return step (c13), if unallocated have a deviate, carry out (c19);
(c19) judge the gain reduction of this optical multiplexing section and whether satisfy constraints,, then need not to adjust if satisfy, execution in step (c17), otherwise, return step (c12).
Further, said method also can have following characteristics: in the described step (c3) to each optical multiplexing section gain reduction and reached at value or detected value when finely tuning, be preferentially those can be reached value or detected value to satisfy constraints and the gain reduction of the optical multiplexing section of adjusting leeway is arranged and the looped network overall gain decays and the direction adjustment of constraints to satisfying; As satisfying looped network overall gain decay and constraints,, perhaps OA and/or VOA are changed again with optical multiplexing section gain reduction with adjust to outside the constraints.
Further, said method also can have following characteristics: in the described step (c4) to optical multiplexing section gain reduction and regulated quantity carry out the branch timing, desire increase gain reduction and the time, preferentially reduce the decay of VOA, increase the gain of OA again; Desire to reduce gain reduction and the time, preferentially reduce the gain of OA, increase the decay of VOA again.
Further, said method also can have following characteristics: in the described step (d), issue when sorting in regulated quantity the OA that will adjust and VOA, when the first round issues, give priority in arranging for and make the decay of looped network overall gain and trend towards satisfying the regulated quantity that constraints maybe can keep satisfying constraints, as also there being the regulated quantity that does not issue, take turns by this priority principle second again and continue to issue.
Further, said method also can have following characteristics: in the described step (d), the regulated quantity that certain OA or VOA are issued is no more than a unit step-length of setting, and once can issue intact, divides take turns issuing more.
Optical add-drop multiplexer ring network multiplex section power optimizing provided by the invention system comprises each network element that links to each other by optical multiplexing section, comprise adjustable optical attenuator VOA that links to each other with the upstream optical multiplexing section and the image intensifer OA that links to each other with this VOA in each network element, and the OA that links to each other with the downstream optical multiplexing section, and each network element all is connected with a control device, this control device further comprises monitoring modular, control module and Executive Module, wherein:
Described monitoring modular is connected with OA in each network element, is used to monitor input, the power output of each OA, and outputs to control module;
Described control module, the input of each OA that is used to monitor, power output, calculate each optical multiplexing section gain reduction and and looped network overall gain decay and, judge whether to satisfy within the scope of looped network constraints regulation separately, when not satisfying, according to each optical multiplexing section gain reduction and and looped network overall gain decay and with the difference of constraints, and the adjustable range of corresponding OA of each optical multiplexing section downstream node and VOA is determined OA and VOA and the regulated quantity thereof that will regulate;
Described Executive Module links to each other with VOA with OA in each network element, and OA and VOA, adjusted value that the need that are used for determining according to control module are regulated issue execution.
Further, said system also can have following characteristics: described control module further comprises gain reduction and computing unit, adjustment decision unit and adjustment amount computing unit:
Gain reduction and computing unit, comprise: first computation subunit, be used for each optical multiplexing section, calculate the poor of corresponding OA Output optical power of its upstream node and the corresponding OA input optical power of downstream node, add the gain of the corresponding OA of downstream node, promptly obtain the gain of this optical multiplexing section and decay and; Second computation subunit is used for gain and the decay and the addition of each optical multiplexing section of looped network that will obtain, obtain looped network the overall gain decay and;
Adjust decision unit, be used for the gain reduction of each optical multiplexing section of looped network and and the overall gain decay of looped network and comparing with looped network constraints, as if satisfying constraints, then need not optimize; If do not satisfy constraints, then trigger the adjustment amount computing unit and handle;
Adjustment amount dispensed unit comprises: first computation subunit, be used for according to the gain reduction of each optical multiplexing section and, constraints and regulated quantity, calculate reached at the value of each optical multiplexing section adjustment; Second computation subunit is used for reached at the value addition with each optical multiplexing section adjustment, with looped network overall gain decay with constraints compare, determine the end value that each optical multiplexing section is adjusted, make the decay of looped network overall gain and satisfy constraints; Distribute subelement, be used for OA and/or VOA that end value with each optical multiplexing section adjustment calculates regulated quantity and is assigned to the downstream node correspondence.
Further, said system also can have following characteristics: described control module also comprises the adjusting sequencing unit, be used for when the first round issues, giving priority in arranging for and make the decay of looped network overall gain and trend towards satisfying the regulated quantity that constraints maybe can keep satisfying constraints, as also there being the regulated quantity that does not issue, take turns by this priority principle second again and continue to issue; And every regulated quantity that certain OA or VOA are issued of taking turns is no more than a unit step-length, once cannot not issue intactly, divides many wheels issuing; Described.
Further, said system also can have following characteristics: first computation subunit of described adjustment amount dispensed unit, it is adjustable range according to corresponding OA of optical multiplexing section downstream node and VOA, calculate each and do not satisfy the optical multiplexing section gain reduction of constraints and reached at the value that approaches an established standards value most that can reach, this standard value is to select in the scope of optical multiplexing section gain reduction and constraints regulation, perhaps, this standard value is from the upstream or reached at the value of downstream node distribution and the deviate of constraints;
Second computation subunit of described adjustment amount dispensed unit, be the end value that obtains each optical multiplexing section gain reduction and adjustment in the following manner: each the optical multiplexing section gain reduction that will adjust earlier and reached at value and each the optical multiplexing section gain reduction that need not to adjust and the detected value addition, with looped network overall gain decay and constraints relatively, as satisfy condition, then reach the end value that value is gain reduction of corresponding light multiplex section and adjustment with described, as not satisfying condition, then to each optical multiplexing section gain reduction of looped network and reached at value or detected value finely tune, make looped network overall gain decay and satisfy constraints, and with the end value of the value after the fine setting as each optical multiplexing section gain reduction and adjustment.
Further, said system also can have following characteristics: described control device is connected with each network element by network management system or signaling system.
As from the foregoing, the present invention is according to the luminous power situation of OADM looped network optical multiplexing section, owing to reasons such as aging or temperature change the fibre circuit condition, when line loss changes, optical multiplexing section luminous power to looped network is optimized, control loop gain and loss are in suitable scope, owing to taked to consider the constraints of the excessive and self-excitation of looped network loss, both avoid line loss to become the big looped network OSNR that produces and the deterioration of power effectively, and avoided loss to reduce to cause the looped network self-excitation again effectively.Further, when adjustment amount issues, can take technical measures such as adjustment amount segmentation, adjusting sequential optimization, reach assurance equipment progressively to be optimized gently, the equipment that effectively guaranteed does not have the effect of error code operation.
Description of drawings
Fig. 1 is an OADM looped network schematic diagram;
Fig. 2 is the OADM looped network schematic diagram that the embodiment of the invention realizes multiplex section power optimizing;
Fig. 3 is the overall procedure schematic diagram that the embodiment of the invention realizes ring network multiplex section power optimizing method;
Fig. 4 optimizes each optical multiplexing section gain reduction of looped network and method flow schematic diagram;
Fig. 5 optimizes to regulate the sequential grammar schematic flow sheet;
Fig. 6 is four node OADM looped network schematic diagrames of realizing multiplex section power optimizing.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of technical scheme is described in further detail:
Figure 1 shows that the schematic diagram of OADM looped network, comprise wavelength shifter (OUT), optical add/drop multiplexer (OADM) and image intensifer (OA) by each network element.In Fig. 1, at the straight-through wavelength of each node, when loop gain during greater than loss, will self-excitation in looped network, this is with the transmission performance of deterioration looped network.Generation type at the straight-through wavelength of each node comprises: the inconsistent of the bandwidth of the wavelength of protection, idle wavelength or OADM device and centre wavelength causes a part of wavelength to leak.
Fig. 2 is for realizing the OADM looped network schematic diagram of present embodiment OADM ring network multiplex section power optimizing method, and each network element is made up of wavelength shifter (OUT), optical add/drop multiplexer (OADM), image intensifer (OA), adjustable optical attenuator (VOA) and control device.Hereinafter, the corresponding OA of optical multiplexing section upstream node is meant the OA that links to each other with this optical multiplexing section in this upstream node, and the OA of optical multiplexing section downstream node correspondence is meant in this downstream node by the OA that VOA links to each other with this optical multiplexing section.
This control device is connected with each network element by network management system or signaling system, is used to realize the OADM ring network multiplex section power optimizing, and this device further comprises monitoring modular, control module and Executive Module.Wherein:
Described monitoring modular is connected with OA in each network element, can connect by network management system or signaling system, is used to monitor input, the power output of each OA, and outputs to control module;
Described control module, the input of each OA that is used to monitor, power output, calculate each optical multiplexing section gain reduction and and looped network overall gain decay and, judge whether to satisfy within the scope of looped network constraints regulation separately, when not satisfying, according to each optical multiplexing section gain reduction and and looped network overall gain decay and with the difference of constraints, and the corresponding OA of each optical multiplexing section downstream node and VOA adjustable range are determined OA and VOA and the regulated quantity thereof that will regulate; Further comprise:
Gain reduction and computing unit, comprise: first computation subunit, be used for each optical multiplexing section, calculate the poor of corresponding OA Output optical power of its upstream node and the corresponding OA input optical power of downstream node, the loss of the acquisition section of striding, add the gain of the corresponding OA of downstream node, promptly obtain the gain of this optical multiplexing section and decay and; Second computation subunit is used for gain and the decay and the addition of each optical multiplexing section of looped network that will obtain, obtain looped network the overall gain decay and.
Adjust decision unit, be used for the gain reduction of each optical multiplexing section of looped network and and the overall gain decay of looped network and comparing with looped network constraints, as if satisfying constraints (vide infra), then need not optimize; If do not satisfy constraints, then trigger the adjustment amount computing unit and handle;
Adjustment amount dispensed unit comprises: first computation subunit, be used for according to the gain reduction of each optical multiplexing section and, corresponding constraints, regulated quantity and other optical multiplexing section deviate of distributing, calculate reached at the value of each optical multiplexing section adjustment.Particularly, present embodiment is the adjustable range according to corresponding OA of optical multiplexing section downstream node and VOA, calculate each and do not satisfy the optical multiplexing section gain reduction of constraints and reached at the value that approaches an established standards value most that can reach, this standard value is to select in the scope of optical multiplexing section gain reduction and constraints regulation, perhaps, this standard value is from the upstream or reached at the value of downstream node distribution and the deviate of constraints; Second computation subunit is used for reached at the value addition with each optical multiplexing section adjustment, compares with the constraints of whole looped network, determines the end value that each optical multiplexing section is adjusted, and makes the overall gain decay of looped network and satisfies constraints.Particularly, present embodiment be each the optical multiplexing section gain reduction that will adjust earlier and reached at value and each the optical multiplexing section gain reduction that need not to adjust and the detected value addition, with looped network overall gain decay and constraints relatively, as satisfy condition, then reach the end value that value is gain reduction of corresponding light multiplex section and adjustment with described, as not satisfying condition, then to each optical multiplexing section gain reduction of looped network and reached at value or detected value finely tune, make looped network overall gain decay and satisfy constraints, and with the end value of the value after the fine setting as each optical multiplexing section gain reduction and adjustment; And the distribution subelement, be used for OA and/or VOA that end value with each optical multiplexing section adjustment calculates regulated quantity and is assigned to the downstream node correspondence.
Regulate sequencing unit, be used for issuing execution, looped network progressively gently is optimized with unit step-length and the order that is ranked; Preferentially issue in the first round and to make looped network overall gain decay and to trend towards satisfying the regulated quantity that constraints maybe can keep satisfying constraints,, take turns by this priority principle second again and continue to issue as also there being the regulated quantity that does not issue.And every regulated quantity that certain OA or VOA are issued of taking turns is no more than a unit step-length, once cannot not issue intactly, divides many wheels issuing.
Described Executive Module is connected with VOA with OA in each network element, OA that the need that are used for determining according to control module are regulated and VOA, adjusted value and adjustment order, dynamically adjust one by one by a fixed step size, make the overall gain decay of looped network and satisfy constraints, and putting the gain reduction that as far as possible makes each optical multiplexing section before this and satisfying constraints.
As shown in Figure 3, the overall procedure schematic diagram for OADM ring network multiplex section power optimizing method of the present invention comprises the steps:
So-called looped network state is that overall gain with the gain reduction of each optical multiplexing section and whole looped network decays and represents.To certain optical multiplexing section, be will have on it the Output optical power of corresponding OA of node deduct the input optical power of the corresponding OA of its downstream node, add the gain of the corresponding OA of its downstream node, obtain this optical multiplexing section gain reduction and, the overall gain decay that again gain reduction and the addition of each optical multiplexing section is obtained whole looped network and.In other embodiments, also can be directly deduct the Output optical power of the corresponding OA of its upstream node with the Output optical power of the corresponding OA of certain optical multiplexing section downstream node, obtain the gain of this optical multiplexing section and decay and.
Step 2 judges whether the looped network state satisfies looped network constraints, if satisfy, then proceeds the looped network status monitoring of step 1; If do not satisfy, then execution in step 3;
And looped network constraints comprises gain reduction and M to each optical multiplexing section
i(i=1,2 ..., requirement N): C1≤M
i≤ 0, be used to guarantee the gain and decay coupling of looped network, the OSNR of looped network and power is deterioration not; And to the requirement of looped network overall gain decay and M: self-excitation is avoided producing less than loss in C2≤M＜0, the gain that is used to guarantee looped network.Wherein, C1 and C2 for default less than 0 constant, can be according to factor values such as ring network structures.Requirement to decay of looped network overall gain and M is more preferential.Constraints also is not limited to top regulation, sometimes for optical multiplexing section gain reduction and, also can allow greater than 0.
Step 3, looped network configuration optimization: according to looped network state and the difference of constraints and the adjustable range of corresponding OA of optical multiplexing section downstream node and VOA, determine OA and VOA and the regulated quantity thereof that will regulate, optimize the looped network optical multiplexing section gain reduction and, to satisfy looped network constraints;
As shown in Figure 4, above-mentioned steps 3 optimize looped network optical multiplexing section gain reductions and flow process further comprise following steps:
Present embodiment is that the median with constraints is a standard value, is for bigger adjusting leeway is arranged in follow-up fine setting.But at concrete environment, the present invention also can rule of thumb choose other value and calculate as standard value in the scope of constraints regulation.
Step 44 if the upstream optical multiplexing section also is untreated, will approach M most in the constraints prescribed limit
iValue deduct current optical multiplexing section M
iThe difference that can reach value is assigned to this upstream optical multiplexing section, execution in step 46 as deviate;
As, suppose the gain reduction of certain optical multiplexing section before regulating and be 1 that optical multiplexing section constraints is-1≤M
i≤ 0, its mid point is-0.5, and the adjustable range of the corresponding VOA of its downstream node is 2, then the gain reduction of this optical multiplexing section and reached at value be-0.5.If the gain reduction of this optical multiplexing section and be 2 before regulating, other condition is constant, then the gain reduction of this optical multiplexing section and reached at value be 0, if the gain reduction of this optical multiplexing section and be 2.5 before regulating, other condition is constant, then the gain reduction of this optical multiplexing section and reached at value be 0.5, and need to distribute-0.5 deviate to untreated upstream optical multiplexing section.Handled as the upstream multiplex section, then when fine setting, handled again.
During fine setting, earlier those can be reached value or detected value in constraints C1≤Mi≤0 scope and the gain reduction of the optical multiplexing section of adjusting leeway is arranged and the looped network overall gain decays and the direction adjustment of constraints to satisfying.For example, optical multiplexing section gain reduction and and overall gain decay and constraints be-1＜M＜0, the looped network overall gain that calculates before the fine setting decays and is+0.5, when then finely tuning, preferentially with each optical multiplexing section gain reduction and reached value or detected value in the scope that constraints is stipulated, adjust, here be to adjust to-1, as with the gain reduction of two optical multiplexing sections with from-0.5 furnishing-0.75, with under the prerequisite that satisfies looped network overall gain decay and constraints, make each optical multiplexing section gain reduction and also satisfied oneself constraints.Really can not satisfy overall gain decay and condition the time, can and adjust to outside the constraints optical multiplexing section gain reduction, perhaps device OA, VOA are changed.
The preferential distribution principle that adopts is: desire increase gain reduction and the time, preferentially reduce the decay of VOA, increase the gain of OA again; Desire to reduce gain reduction and the time, preferentially reduce the gain of OA, increase the decay of VOA again.The performance that so more helps system.
Need to prove especially, the process of the end value of determining each optical multiplexing section gain reduction of looped network above and optimizing and revising is an example, in fact, must not observe a fixing flow process and derive, be fine yet as deriving by the method that each optical multiplexing section value is attempted.Perhaps only calculate reached at the value that each does not satisfy the optical multiplexing section of constraints at the beginning, do not carry out the distribution of deviate; Each the optical multiplexing section gain reduction that to adjust then and reached at value and each the optical multiplexing section gain reduction that need not to adjust and the detected value addition, with constraints C2≤M＜0 relatively, as satisfy condition, then can no longer adjust, as not satisfying, unified again the fine setting also is fine.In a word,, putting before this as long as can make last looped network overall gain decay and satisfy constraints, the gain reduction of each optical multiplexing section and satisfy constraints as far as possible and get final product, and also the end value result of adjustment neither be unique.
In order to prevent that Executive Module adjustment amount transmitting sequence is improper or issue too fast, cause the looped network performance degradation, so when above-mentioned steps 4 is carried out looped network configuration replacement, the regulated quantity that is the OA that will adjust and VOA issues execution with suitable step-length and order, specifically as shown in Figure 5, can finish by following steps:
Whether step 63, the regulated quantity of judging current optical multiplexing section make the decay of looped network overall gain and are tending towards constraints or remain in the constraint condition, if then execution in step 65; Otherwise execution in step 64;
The decay of for example current looped network overall gain and value be 1, and the regulated quantity of current optical multiplexing section is-0.5, then this regulated quantity makes the decay of looped network overall gain and is tending towards constraints.This is that looped network self-excitation or mis-behave occur because of not satisfying constraints in the adjustment process.
Step 64, the optical multiplexing section that finds next to adjust returns step 63;
Step 68 enters the arrangement of next round regulated quantity, returns step 62;
In another embodiment, when calculating, issue also according to the order of sequence simultaneously and be fine.
With an example the present invention is further detailed below:
Fig. 6 one has 1,2,3,4 looped networks of totally 4 OADM network elements.This looped network has 4 optical multiplexing sections.Network element 1 is designated as OMS# 1 to being an optical multiplexing section between the network element 2.Network element 2 is designated as OMS#2 to being an optical multiplexing section between the network element 3.Network element 3 is designated as OMS#3 to being an optical multiplexing section between the network element 4.Network element 4 is designated as OMS# 4 to being an optical multiplexing section between the network element 1.Detected looped network state is as shown in the table.
The constraints of supposing looped network is :-1≤M
i≤ 0 and-1≤M≤0.OMS#2 does not satisfy the constraints of optical multiplexing section, and this looped network overall gain decay and greater than loss, has the possibility of self-excitation.
The adjustable range of supposing each VOA is 3, according to method shown in the present, calculate OMS#2 gain reduction and reached at value and end value be-0.5, the gain reduction of other OMS and end value still are 0, needn't regulate, the looped network overall gain that obtains decays and is-0.5.When issuing because need reduce gain reduction and, so that regulate is the VOA2 of OMS#2 downstream node correspondence, suppose that it is 0.5 that VOA regulates step-length, then the regulated quantity 2.5 of this VOA2 needs to divide 5 to take turns and issue.Certainly, with OMS#2 gain reduction and end value be decided to be 0, divide 4 to take turns the regulated quantity 2 that issues VOA2 and also be fine.
Under another kind of condition, if the regulated quantity of VOA is 1.5, reached at the value that then calculates OMS#2 is 0.5, need distribute-0.5 deviate to OMS# 1, then the gain reduction of each section and end value in, OMS# 1 is-0.5, regulated quantity is-0.5; OMS#2 is 0.5, and regulated quantity is-1.5; Other is zero.By the method for salary distribution of invention to regulated quantity, the regulated quantity that can determine VOA1 is 0.5, and the regulated quantity of VOA2 is 1.5, when issuing, then issues the regulated quantity 0.5 of VOA1 and VOA2 in the first round, and second, third is taken turns the regulated quantity 0.5 that issues VOA2 again and gets final product.
In sum, the present invention is according to the optical multiplexed layer luminous power situation of whole OADM looped network optical multiplexing section OMS, luminous power to whole looped network optical multiplexing section is optimized, taked to consider the constraints of the excessive and self-excitation of loss, reached and both effectively avoided line loss to become the big looped network OSNR that produces and the deterioration of power, effectively avoided loss to reduce to cause the looped network self-excitation again.Simultaneously, issue in the process, adjustment amount is progressively issued, and make and to issue that looped network is tending towards constraints in the process, thereby make the mild progressively optimization of luminous power of looped network with the minor adjustment step-length at the Executive Module adjustment amount.Segment, whether be tending towards the technical measures such as transmitting sequence that constraints is judged adjustment amount owing to taked to consider loss constraints, adjustment amount excessive and self-excitation, can guarantee effectively that system does not have the error code operation in the OADM looped network optimizing process according to adjusting.
Claims (13)
1, a kind of optical add-drop multiplexer ring network multiplex section power optimizing method, being applied to each optical multiplexing section upstream node has corresponding image intensifer OA, and downstream node has the system of corresponding OA and optical attenuator VOA, and this method may further comprise the steps:
(a) the input and output power of amplifier in monitoring looped network each network element, calculate each optical multiplexing section gain reduction and and the decay of looped network overall gain and;
Calculate certain optical multiplexing section gain reduction and the time, it is the input optical power that the Output optical power of the corresponding OA of this optical multiplexing section upstream node that will monitor deducts the corresponding OA of its downstream node, add that the gain of the corresponding OA of its downstream node obtains, or deduct with the Output optical power of the corresponding OA of its downstream node that the Output optical power of its upstream node correspondence OA obtains; The looped network overall gain decays and each optical multiplexing section gain reduction of looped network and addition is obtained;
(b) judge each optical multiplexing section calculate gain reduction and and looped network overall gain decay and whether within the scope of looped network constraints regulation, if satisfy, execution in step (a), otherwise, execution in step (c);
In the looped network constraints be to the gain reduction of each optical multiplexing section and the requirement of Mi: C1≤Mi≤0; Requirement to decay of looped network overall gain and M is: C2≤M＜0; Wherein, C1 and C2 for default less than 0 constant, more preferential to the requirement of decay of looped network overall gain and M;
(c) according to the gain reduction of each optical multiplexing section and and the decay of looped network overall gain and with the difference of constraints separately, and the adjustable range of corresponding OA of optical multiplexing section downstream node and VOA, determine OA and VOA and the regulated quantity thereof that to regulate, make looped network overall gain decay and satisfy constraints;
(d) OA that will adjust and VOA and regulated quantity thereof issue execution, and looped network is optimized.
2, the method for claim 1 is characterized in that, described step (c) further may further comprise the steps:
(c1) according to the adjustable range of corresponding OA of optical multiplexing section downstream node and VOA, calculate each and do not satisfy the optical multiplexing section gain reduction of constraints and reached at the value that approaches an established standards value most that can reach;
(c2) each the optical multiplexing section gain reduction that will adjust and reached at value and each the optical multiplexing section gain reduction that need not to adjust and the detected value addition, with looped network overall gain decay and constraints relatively, as satisfy condition, then reach the end value that value is gain reduction of corresponding light multiplex section and adjustment with described, execution in step (c4), as not satisfying condition execution in step (c3);
(c3) to each optical multiplexing section gain reduction of looped network and reached at value or detected value finely tune, make looped network overall gain decay and satisfy constraints, and with the end value of the value after the fine setting as each optical multiplexing section gain reduction and adjustment;
(c4) with each optical multiplexing section gain reduction and currency and end value poor, promptly regulated quantity is distributed to the OA and/or the VOA of its downstream node correspondence, finishes.
3, method as claimed in claim 2 is characterized in that, the standard value in the described step (c1) is to select in the scope of optical multiplexing section gain reduction and constraints regulation.
4, method as claimed in claim 2 is characterized in that, described step (c1) is further divided into following steps:
(c11) be initial network element with certain network element, begin to handle, judge its gain reduction successively and whether satisfy constraints, when finding first optical multiplexing section that does not satisfy constraints, carry out next step from first optical multiplexing section;
(c12) according to the adjustable range of corresponding OA of current optical multiplexing section downstream node and VOA, in the constraints prescribed limit, select a standard value, reached at the value that approaches this standard value most that calculates this optical multiplexing section gain reduction and can reach;
(c13) whether reached at the value of judging this optical multiplexing section gain reduction and Mi satisfies constraints: C1≤Mi≤0, if satisfy execution in step (c17), otherwise execution in step (c14);
(c14) whether reached at the value of judging the gain reduction of this optical multiplexing section and Mi greater than zero, if, execution in step (c15), otherwise, execution in step (c16);
(c15) if the upstream optical multiplexing section also is untreated, the value that approaches Mi in the constraints prescribed limit is most deducted difference that current optical multiplexing section Mi can reach value as deviate, be assigned to this upstream optical multiplexing section, execution in step (c17);
(c16) if the downstream optical multiplexing section also is untreated, the value that approaches Mi in the constraints prescribed limit is most deducted difference that current optical multiplexing section Mi can reach value as deviate, be assigned to this downstream optical multiplexing section;
(c17) judge whether each optical multiplexing section of looped network is handled, if, execution in step (c2), otherwise, be current multiplex section with next optical multiplexing section, execution in step (c18);
(c18) judge whether current optical multiplexing section is assigned deviate, if have, then the tuningout value sum of distributing with other optical multiplexing section is a standard value, reached at the value that approaches this standard value most of calculating this optical multiplexing section gain reduction and can reaching, return step (c13), if unallocated have a deviate, carry out (c19);
(c19) judge the gain reduction of this optical multiplexing section and whether satisfy constraints,, then need not to adjust if satisfy, execution in step (c17), otherwise, return step (c12).
5, method as claimed in claim 2, it is characterized in that, in the described step (c3) to each optical multiplexing section gain reduction and reached at value or detected value when finely tuning, be preferentially those can be reached value or detected value to satisfy constraints C1≤Mi≤0 and the gain reduction of the optical multiplexing section of adjusting leeway is arranged and the looped network overall gain decays and the direction adjustment of constraints to satisfying; As satisfying looped network overall gain decay and constraints,, perhaps OA and/or VOA are changed again with optical multiplexing section gain reduction with adjust to outside the constraints.
6, method as claimed in claim 2 is characterized in that, in the described step (c4) to optical multiplexing section gain reduction and regulated quantity carry out the branch timing, desire increase gain reduction and the time, preferentially reduce the decay of VOA, increase the gain of OA again; Desire to reduce gain reduction and the time, preferentially reduce the gain of OA, increase the decay of VOA again.
7, the method for claim 1, it is characterized in that, in the described step (d), issue when sorting in regulated quantity the OA that will adjust and VOA, when the first round issues, give priority in arranging for and make the decay of looped network overall gain and trend towards satisfying the regulated quantity that constraints maybe can keep satisfying constraints, as also there being the regulated quantity that does not issue, take turns by this priority principle second again and continue to issue.
As claim 1 or 7 described methods, it is characterized in that 8, in the described step (d), the regulated quantity that certain OA or VOA are issued is no more than a unit step-length of setting, and once can issue intact, divides take turns issuing more.
9, a kind of optical add-drop multiplexer ring network multiplex section power optimizing system, comprise each network element that links to each other by optical multiplexing section, it is characterized in that, comprise adjustable optical attenuator VOA that links to each other with the upstream optical multiplexing section and the image intensifer OA that links to each other with this VOA in each network element, and the OA that links to each other with the downstream optical multiplexing section, and each network element all is connected with a control device, and this control device further comprises monitoring modular, control module and Executive Module, wherein:
Described monitoring modular is connected with OA in each network element, is used to monitor input, the power output of each OA, and outputs to control module;
Described control module, the input of each OA that is used to monitor, power output, calculate each optical multiplexing section gain reduction and and looped network overall gain decay and, judge whether to satisfy within the scope of looped network constraints regulation separately, when not satisfying, according to each optical multiplexing section gain reduction and and looped network overall gain decay and with the difference of constraints, and the adjustable range of corresponding OA of each optical multiplexing section downstream node and VOA is determined OA and VOA and the regulated quantity thereof that will regulate;
Calculate certain optical multiplexing section gain reduction and the time, be the input optical power that the Output optical power of the corresponding OA of this optical multiplexing section upstream node that will monitor deducts the corresponding OA of its downstream node, add that the gain of the corresponding OA of its downstream node obtains; The looped network overall gain decays and each optical multiplexing section gain reduction of looped network and addition is obtained; In the looped network constraints be to the gain reduction of each optical multiplexing section and the requirement of Mi: C1≤Mi≤0; Requirement to decay of looped network overall gain and M is: C2≤M＜0; Wherein, C1 and C2 for default less than 0 constant, more preferential to the requirement of decay of looped network overall gain and M;
Described Executive Module links to each other with VOA with OA in each network element, and OA and VOA, adjusted value that the need that are used for determining according to control module are regulated issue execution.
10, system as claimed in claim 9 is characterized in that, described control module further comprises gain reduction and computing unit, adjustment decision unit and adjustment amount computing unit:
Gain reduction and computing unit comprise: first computation subunit, be used to calculate each optical multiplexing section gain reduction and; Second computation subunit, be used to calculate looped network the overall gain decay and;
Adjust decision unit, be used for the gain reduction of each optical multiplexing section of looped network and and the overall gain decay of looped network and comparing with looped network constraints, as if satisfying constraints, then need not optimize; If do not satisfy constraints, then trigger the adjustment amount computing unit and handle;
Adjustment amount dispensed unit comprises: first computation subunit, be used for according to the gain reduction of each optical multiplexing section and, constraints, regulated quantity and other optical multiplexing sections deviate of distributing, calculate reached at the value of each optical multiplexing section adjustment; Second computation subunit, be used for reached at value addition with each optical multiplexing section adjustment, with looped network overall gain decay with constraints compare, reached at value to each optical multiplexing section adjustment is finely tuned, make the decay of looped network overall gain and satisfy constraints, and with the end value of the value after the fine setting as each optical multiplexing section adjustment; Distribute subelement, be used for OA and/or VOA that end value with each optical multiplexing section adjustment calculates regulated quantity and is assigned to the downstream node correspondence.
11, system as claimed in claim 10, it is characterized in that, described control module also comprises the adjusting sequencing unit, be used for when the first round issues, giving priority in arranging for and make the decay of looped network overall gain and trend towards satisfying the regulated quantity that constraints maybe can keep satisfying constraints, as also there being the regulated quantity that does not issue, take turns by this priority principle second again and continue to issue; And every regulated quantity that certain OA or VOA are issued of taking turns is no more than a unit step-length, once cannot not issue intactly, divides many wheels issuing.
12, system as claimed in claim 10, it is characterized in that, first computation subunit of described adjustment amount dispensed unit, it is adjustable range according to corresponding OA of optical multiplexing section downstream node and VOA, calculate each and do not satisfy the optical multiplexing section gain reduction of constraints and reached at the value that approaches an established standards value most that can reach, this standard value is to select in the scope of optical multiplexing section gain reduction and constraints regulation, perhaps, this standard value is from the upstream or reached at the value of downstream node distribution and the deviate of constraints;
Second computation subunit of described adjustment amount dispensed unit, be the end value that obtains each optical multiplexing section gain reduction and adjustment in the following manner: each the optical multiplexing section gain reduction that will adjust earlier and reached at value and each the optical multiplexing section gain reduction that need not to adjust and the detected value addition, with looped network overall gain decay and constraints relatively, as satisfy condition, then reach the end value that value is gain reduction of corresponding light multiplex section and adjustment with described, as not satisfying condition, then to each optical multiplexing section gain reduction of looped network and reached at value or detected value finely tune, make looped network overall gain decay and satisfy constraints, and with the end value of the value after the fine setting as each optical multiplexing section gain reduction and adjustment.
13, system as claimed in claim 11 is characterized in that, described control device is connected with each network element by network management system or signaling system.
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| CNB2006100839534A CN100505591C (en) | 2006-06-12 | 2006-06-12 | Optical add-drop multiplexer ring network multiplex section power optimizing method and its system |
| PCT/CN2006/003788 WO2007143892A1 (en) | 2006-06-12 | 2006-12-30 | A method for optimizing power of the oadm ring network multiplexing segment and a system thereof |
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| CN101808257B (en) * | 2010-02-26 | 2012-09-12 | 北京邮电大学 | Method and device for optimizing dynamic transmission performance in wavelength switched optical network |
| CN106303765B (en) | 2015-05-26 | 2019-03-15 | 中兴通讯股份有限公司 | A kind of distribution automated power optimization system and method |
| CN112583489A (en) * | 2019-09-30 | 2021-03-30 | 中兴通讯股份有限公司 | Automatic method and device for optical network power control and storage medium |
| CN112311462B (en) * | 2020-11-05 | 2021-09-03 | 湖北工业大学 | Access layer equipment ring forming optimization method and system based on Packet Transport Network (PTN) |
| CN115001582B (en) * | 2022-05-26 | 2024-02-27 | 武汉光迅电子技术有限公司 | Control method and device of variable optical attenuator |
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| WO2001039415A1 (en) * | 1999-11-24 | 2001-05-31 | Centerpoint Broadband Technologies Inc. | Intelligent power controller |
| US6377396B1 (en) * | 2000-09-26 | 2002-04-23 | Onetta, Inc. | Optical amplifiers with variable optical attenuation for use in fiber-optic communications systems |
| US6721509B2 (en) * | 2000-12-05 | 2004-04-13 | Avanex Corporation | Self-adjusting optical add-drop multiplexer and optical networks using same |
| JP4171641B2 (en) * | 2002-06-14 | 2008-10-22 | 富士通株式会社 | Optical amplifier and control method thereof |
| EP1590704A2 (en) * | 2003-02-07 | 2005-11-02 | IPG Photonics Corporation | Multiport optical amplifier with narrowcast power equalization |
| US7430373B2 (en) * | 2003-03-10 | 2008-09-30 | Nec Corporation | Optical node processor, optical network system and its control method |
| CN100492958C (en) * | 2003-08-20 | 2009-05-27 | 烽火通信科技股份有限公司 | Device of line attenuation self adaption and path equilibrium automatic adjustment of light interleave multiplexer |
| JP4397239B2 (en) * | 2004-01-15 | 2010-01-13 | 富士通株式会社 | Optical transmission system |
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