CN109889360A - Determine the method and device of regenerator placement location - Google Patents
Determine the method and device of regenerator placement location Download PDFInfo
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Abstract
The present invention provides a kind of method and device of determining regenerator placement location.Present invention determine that the method for regenerator placement location, comprising: obtain the shortest path P in network between any two nodei,PiFor the i-th paths, i is the integer more than or equal to 1；Obtain the optical signal to noise ratio OSNR in all paths；The optical signal to noise ratio OSNR M paths for being less than preset threshold are added in first set, the M is positive integer；According to the number of repetition in the path of node in the first aggregate, the attribute value of each node is determined；According to the attribute value of the node, the placement location of regenerator is determined.Method proposed by the present invention efficiently utilizes regenerator resource while guaranteeing signal transmission quality.
Description
Technical field
The present invention relates to network planning fields, more particularly to determine the method and device of regenerator placement location.
Background technique
Smart grid is exactly the intelligence of power grid, compared with existing power grid, smart grid embody flow of power, information flow and
The distinguishing feature of Business Stream height fusion.With the expansion of power grid scale and accelerating for power information, information is logical
Communication network cover comprehensively hair, it is defeated, match, the various aspects such as electricity consumption are provided for acquiring accurate information in time for power consumer
Continue, reliable operation.Communication network is the important component of smart grid, is to realize power grid security, reliable, warp
The basis of Ji, efficient operation.It is therefore desirable to carry out reasonable planning and designing to communication network opening up structure, it is reliable to improve network
Property, support the safe and stable operation of all kinds of smart grid business；Meanwhile needing to optimize the deployment and configuration of the communication resource, it improves
Resource utilization reduces the communication network development and operation cost.Therefore, it builds and develops smart grid and need to study intelligence electricity
The planning of Netcom's communication network and optimization method.
To solve long distance transmission bring problem of signal attenuation, image intensifer is introduced in during optical-fiber network deployment.
For image intensifer while amplifying optical signal, itself can also generate spontaneous emission noise, influence the transmission quality of signal.With industry
The scale of the increase of business demand, network is increasing, and the distance of optical signal transmission is also increasingly remoter, and image intensifer is introduced to make an uproar
Sound increasingly cannot be ignored, and how guarantee that optical path may achieve for an important problem.Therefore, there is signal to amplify again,
(O/E/O) 3R regenerator of reshaping, again timing function is also introduced into the regeneration for being used to carry out signal in communication network.Although again
Raw device has the function of signal regeneration, but its energy consumption is big and at high cost, so should optimize as much as possible regenerator in a network
Placement, achieve the purpose that reduce power consumption, reduce cost.In the prior art, regenerator is placed, common method is in institute
Greed places regenerator on light requirement access.Greedy algorithm (also known as greedy algorithm) refers to that in the step of each step solves, it is wanted
Seek the selection optimum operation of " greediness ", selection is immutable in the next steps once make, and it is desirable that by it is a series of most
It is preferred that selecting, one " globally optimal solution " can be led to the problem of.Greedy algorithm is used in the smart grid network planning, that is, is assessed
The transmission quality of each optical path places regenerator to the underproof optical path of transmission quality, to complete the regeneration of a network
Device is placed.
However, placing regenerator using greedy algorithm, do not taken in from total optimization, what is made is in certain meaning
Locally optimal solution in justice may generate the regenerator of redundant configuration, waste resource.
Summary of the invention
The present invention provides a kind of method and device of determining regenerator placement location, is guaranteeing the same of signal transmission quality
When, efficiently utilize regenerator resource.
Present invention determine that the method for regenerator placement location comprising the steps of:
Obtain the shortest path P in network between any two nodei,PiFor the i-th paths, i is the integer more than or equal to 1；
Obtain the optical signal to noise ratio OSNR in all paths；
The optical signal to noise ratio OSNR M paths for being less than preset threshold are added in first set, the M is positive integer；
According to the number of repetition in the path of node in the first aggregate, the attribute value of each node is determined；
According to the attribute value of the node, the placement location of regenerator is determined.
Further, the attribute value according to the node, determines the placement location of regenerator, comprising:
Determine that the maximum node of attribute value places regenerator.
Further, after the maximum node placement regenerator of the determining attribute value, further includes:
Reacquire the OSNR of the M paths in the first set；
The path that OSNR in the first set is more than or equal to preset threshold is deleted, and the attribute value for resetting all nodes is
Initial value；
The number of repetition executed in the path of the node in the first aggregate is returned, determines the attribute value of each node.
Further, the method also includes:
If the first set is that empty or arbitrary node attribute value is all not more than 1, condition is unsatisfactory for for remaining osnr
Path, regenerator is placed by greedy algorithm.
Further, the optical signal to noise ratio OSNR for obtaining each path, comprising:
Optical signal to noise ratio OSNR is calculated according to formula (1)
Wherein,
LiIt is the span loss that i-th of light puts section,
NFiIt is the spontaneous emission noise coefficient of i-th of image intensifer,
PoutiIt is the output power of i-th of image intensifer,
N is always to put number of segment.
The present invention also provides a kind of devices of determining regenerator placement location, comprising:
Module is obtained, the module that obtains is used to obtain the shortest path P in network between any two nodei,PiIt is i-th
Path, i are the integer more than or equal to 1, obtain the optical signal to noise ratio OSNR in all paths；
Determining module, the M paths that the determining module is used to for optical signal to noise ratio OSNR being less than preset threshold are added first
In set, the M is positive integer；According to the number of repetition in the path of node in the first aggregate, the category of each node is determined
Property value；According to the attribute value of the node, the placement location of regenerator is determined.
Further, the determining module is also used to, and determines that the maximum node of attribute value places regenerator.
Further, the acquisition module is also used to,
Reacquire the OSNR of the M paths in the first set；
The determining module is also used to, and is deleted the path that OSNR in the first set is more than or equal to preset threshold, is laid equal stress on
The attribute value for setting all nodes is initial value, returns to the number of repetition executed in the path of the node in the first aggregate, really
The attribute value of fixed each node.
Further, the determining module is also used to,
If the first set is that empty or arbitrary node attribute value is all not more than 1, condition is unsatisfactory for for remaining osnr
Path, regenerator is placed by greedy algorithm.
Further, the acquisition module is also used to,
Optical signal to noise ratio OSNR is calculated according to formula (1)
Wherein,
LiIt is the span loss that i-th of light puts section,
NFiIt is the spontaneous emission noise coefficient of i-th of image intensifer,
PoutiIt is the output power of i-th of image intensifer,
N is always to put number of segment.
The method and device of determining regenerator placement location provided by the invention, by the attribute value of calculate node, according to
The attribute value of node determines the placement location of regenerator, preferentially places regenerator in shared node, efficiently utilizes regenerator
Resource reaches reduction power consumption, the effect of save the cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow chart present invention determine that the embodiment of the method one of regenerator placement location；
Fig. 2 is the flow chart present invention determine that the embodiment of the method two of regenerator placement location；
Fig. 3 is the structure chart present invention determine that the Installation practice one of regenerator placement location.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Description and claims of this specification and term " first ", " second ", " third " " in above-mentioned attached drawing
The (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manage
The data that solution uses in this way are interchangeable under appropriate circumstances, so that the embodiment of the present invention described herein for example can be to remove
Sequence other than those of illustrating or describe herein is implemented.In addition, term " includes " and " having " and theirs is any
Deformation, it is intended that cover it is non-exclusive include, for example, containing the process, method of a series of steps or units, system, production
Product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for this
A little process, methods, the other step or units of product or equipment inherently.
In the description of the present invention, the meaning of " plurality " is at least two, such as two, three etc., unless otherwise clear
It is specific to limit.
These specific embodiments can be combined with each other below, may be at certain for the same or similar concept or process
A little embodiments repeat no more.
The method and device of determining regenerator placement location provided by the invention, is unsatisfactory for threshold value for optical signal to noise ratio OSNR
Regenerator is preferentially placed in the high node of its multiplicity in the path of condition, compared with the prior art in greedy Placement, subtract
The quantity for having lacked required regenerator, reduces power consumption, has saved cost.
Fig. 1 is the flow chart present invention determine that the embodiment of the method one of regenerator placement location, method packet in the present embodiment
Include following steps,
Shortest path P in S101, acquisition network between any two nodei；
Wherein, PiFor the i-th paths, i is the integer more than or equal to 1.
Specifically, network topology model is turned to a non-directed graph G (V, E), wherein V is node collection, and E is side collection, is being protected
Under the premise of demonstrate,proving optical path between any two node and can leading to, the shortest path between any two node is found.
Shortest path first Dijkstra's algorithm (Dijkstra) can be used in the present invention, it can using Dij stra algorithm
Obtain the shortest path in network between any two node.
Di Jiesitela (dijkstra) algorithm is the typical algorithm for being used to solve shortest path, by Dutch computer section
Scholar Dick Si Tela is proposed in nineteen fifty-nine, for acquiring from starting point to other all the points shortest paths.
S102, the optical signal to noise ratio OSNR for obtaining all paths；
Wherein, the definition of optical signal to noise ratio (Optical Signal Noise Ratio, OSNR) is to be in light effective bandwidth
The ratio of optical signal power and noise power in 0.1nm.
Specifically, optical signal to noise ratio OSNR can be calculated according to formula (1),
Wherein,
LiIt is the span loss that i-th of light puts section, unit dB；
NFiIt is the spontaneous emission noise coefficient of i-th of image intensifer, unit dB；
PoutiIt is the output power of i-th of image intensifer, unit dBm；
N is always to put number of segment.
Optionally, optical signal to noise ratio OSNR can be calculated according to formula (2),
Assuming that output power (the magnification method power including accumulation) total after each amplifier is equal, simultaneously
The gain of amplifier is much larger than 1, then optical signal to noise ratio are as follows:
OSNR=Pout-L-NF-10lgN-10lg[hvΔB0]
(2)
Wherein,
PoutIt is the output power of each channel power amplifier and line amplifier, unit dBm；
L is span loss, unit dB；
FIt is the spontaneous emission noise coefficient of image intensifer, unit is dB；
Wherein -10lg [hv Δ B0]=58；
N is always to put number of segment.
Important parameter of the optical signal to noise ratio as characterization optical signal transmission quality, is of great importance to estimation and measuring system,
When actually calculating the OSNR of light-path, we are calculated using formula (1), are more in line with actual application scenarios.
S103, the M paths that optical signal to noise ratio OSNR is less than to preset threshold are added in first set；Wherein, the M is positive
Integer；
Preset threshold in the present embodiment is that those skilled in the art are arranged according to requirement when practical application to OSNR
, it is not limited to a certain specific value.
S104, according to the number of repetition in node path in the first aggregate, determine the attribute value of each node；
In the present embodiment, times (n) is the attribute of arbitrary node n ∈ V, is represented during the node routes obtained by calculating
Multiplicity, initial value 0,
It if n is a node of certain paths in set L, and is not the start node in the path, then for node n
Times (n)=times (n)+1；
S105, according to the attribute value of the node, determine the placement location of regenerator.
One optional embodiment, step S105 can specifically,
Determine that the maximum node of attribute value places regenerator；
The maximum point of times is obtained, places regenerator in the node, in the path in the set L comprising the node,
It is regeneration node by the node label.
Another optional embodiment, step S105 can specifically,
Determine that the maximum multiple nodes of attribute value place regenerator；
It can be obtained in the maximum multiple points of times, regenerator placed in those nodes, in the set L comprising the node
In path in, by the node label be regeneration node.
Wherein, regenerator, digital signal is after optical fiber distance is transmitted, due to the influence of optical fiber attenuation and dispersion, light
The amplitude of pulse can reduce, and shape can be distorted.In order to extend transmission distance, it is necessary to use regenerator REG
(Regenerator)。
The effect of regenerator is to receive optical signal having decayed after long-distance optical fiber transmits, having distorted, is then carried out
Equilibrium amplification, identification, optical signal regenerating rule, being suitable for line transmission are sent.
Optionally, 3R regenerator is used in the present embodiment, the basic function of 3R regenerator is to carry out optical-electronic-to optical signal
Light conversion when optical signal switchs to electric signal, then is amplified, three timing, reshaping important treatment processes again, will be inputted
The small signal being distorted be subject to balanced amplification.
The existing placement to regenerator in the network planning considers OSNR seldom to study, and optical signal to noise ratio OSNR is shadow
The very important factor for ringing optical signal transmission quality is the important parameter for characterizing signal transmission quality, and the present invention is based on OSNR
It carries out regenerator and places the research of problem, while a kind of placement of shared node priority algorithm progress regenerator being provided, guaranteeing
Regenerator resource is efficiently utilized while signal transmission quality.
The present invention determines the placement location of regenerator according to the attribute value of node by the attribute value of calculate node, altogether
There is node preferentially to place regenerator, efficiently utilize regenerator resource, reaches reduction power consumption, the effect of save the cost.
Fig. 2 is the flow chart present invention determine that the embodiment of the method two of regenerator placement location；Embodiment illustrated in fig. 2 be
On the basis of embodiment illustrated in fig. 1, specifically, in the method for the present embodiment, after step S105, further includes:
S106, the OSNR for reacquiring M paths in the first set；
In the present embodiment, specifically, recalculating the optical signal to noise ratio OSNR in all paths in first set.
OSNR is more than or equal to the path of preset threshold in S107, the deletion first set, and resets the category of all nodes
Property value be initial value；
In the present embodiment, if the initial value of attribute value is 0；
Specifically, the path for being more than or equal to preset threshold optical signal to noise ratio OSNR is removed from first set, reset simultaneously
Times (n)=0 of all nodes.
If S108, first set are that empty or arbitrary node attribute value is all not more than 1, S109 is entered step, otherwise,
Return step S104；
In the present embodiment, if the optical signal to noise ratio OSNR after placing regenerator of the path in first set is met the requirements,
By it from being unsatisfactory for removing in set of paths, and so on, iteration, until being unsatisfactory for set of paths as empty or any section
The multiplicity of point is no more than 1.
S109, the path for being less than preset threshold for OSNR, place regenerator by greedy algorithm.
The method of determining regenerator placement location provided in this embodiment, by the optical signal to noise ratio for first calculating all paths
Then OSNR is unsatisfactory for the path of threshold condition to optical signal to noise ratio OSNR, preferentially place regenerator in the high node of multiplicity, such as
Fruit path OSNR after placing regenerator is met the requirements, then by it from being unsatisfactory for removing in set of paths, and so on, repetition changes
Generation is empty or arbitrary node multiplicity no more than 1 until being unsatisfactory for set of paths, if there are also not by aforesaid operations
Meet the path of condition, then regenerator placed to it by greedy algorithm, compared with the prior art in greedy Placement, subtract
The quantity for having lacked required regenerator, reduces power consumption, has saved cost.
Fig. 3 is the structure chart present invention determine that the Installation practice one of regenerator placement location；
As shown in figure 3, present invention determine that the device of regenerator placement location, comprising:
Obtain module 31 and determining module 32；
Obtaining shortest path Pi, Pi that module 31 is used to obtain in network between any two node is the i-th paths, and i is big
In the integer for being equal to 1, the optical signal to noise ratio OSNR in all paths is obtained；
The M paths that determining module 32 is used to for optical signal to noise ratio OSNR being less than preset threshold are added in first set, and M is positive
Integer；According to the number of repetition in the path of node in the first aggregate, the attribute value of each node is determined；According to the node
Attribute value, determine the placement location of regenerator.
Optionally it is determined that module is also used to, determine that the maximum node of attribute value places regenerator.
Optionally, the acquisition module is also used to,
Reacquire the OSNR of the M paths in the first set；
The determining module is also used to, and is deleted the path that OSNR in the first set is more than or equal to preset threshold, is laid equal stress on
The attribute value for setting all nodes is initial value, returns to the number of repetition executed in the path of the node in the first aggregate, really
The attribute value of fixed each node.
Optionally, the determining module is also used to,
If the first set is that empty or arbitrary node attribute value is all not more than 1, condition is unsatisfactory for for remaining OSNR
Path, regenerator is placed by greedy algorithm.
Optionally, the acquisition module is also used to,
Optical signal to noise ratio OSNR is calculated according to formula (1)
Wherein,
LiIt is the span loss that i-th of light puts section, unit dB；
NFiIt is the spontaneous emission noise coefficient of i-th of image intensifer, unit dB；
PoutiIt is the output power of i-th of image intensifer, unit dBm；
N is always to put number of segment.
The device of the present embodiment, can be used for executing the technical solution of embodiment of the method shown in Fig. 1-2, realization principle and
Technical effect is similar, and details are not described herein again.
The method and device of determining regenerator placement location provided by the invention, by the light noise for first calculating all paths
Than OSNR, it is then unsatisfactory for the path of threshold condition to optical signal to noise ratio OSNR, preferentially places regenerator in the high node of multiplicity,
If path optical signal to noise ratio OSNR after placing regenerator is met the requirements, by it from being unsatisfactory for removing in set of paths, with this
Analogize, iteration, is empty or arbitrary node multiplicity no more than 1 until being unsatisfactory for set of paths, if by upper
Operation is stated there are also the path that optical signal to noise ratio OSNR is unsatisfactory for condition, then regenerator is placed to it by greedy algorithm, compared to existing
The greedy Placement having, reduces the quantity of required regenerator, reduces power consumption, saved cost.
It should be noted that it should be understood that the modules of apparatus above division be only a kind of logic function division,
It can completely or partially be integrated on a physical entity in actual implementation, it can also be physically separate.And these modules can be with
All realized by way of processing element calls with software；It can also all realize in the form of hardware；It can also part mould
Block realizes that part of module passes through formal implementation of hardware by way of processing element calls software.For example, determining module can be with
For the processing element individually set up, it also can integrate and realized in some chip of above-mentioned apparatus, in addition it is also possible to program
The form of code is stored in the memory of above-mentioned apparatus, is called by some processing element of above-mentioned apparatus and is executed above true
The function of cover half block.The realization of other modules is similar therewith.Furthermore these modules completely or partially can integrate together, can also
With independent realization.Processing element described here can be a kind of integrated circuit, the processing capacity with signal.In the process of realization
In, each step of the above method or the above modules can by the integrated logic circuit of the hardware in processor elements or
The instruction of software form is completed.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned include: ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of method of determining regenerator placement location, which is characterized in that comprise the steps of:
Obtain the shortest path P in network between any two nodei,PiFor the i-th paths, i is the integer more than or equal to 1；
Obtain the optical signal to noise ratio OSNR in all paths；
The optical signal to noise ratio OSNR M paths for being less than preset threshold are added in first set, the M is positive integer；
According to the number of repetition in the path of node in the first aggregate, the attribute value of each node is determined；
According to the attribute value of the node, the placement location of regenerator is determined.
2. the method according to claim 1, wherein the attribute value according to the node, determines regenerator
Placement location, comprising:
Determine that the maximum node of attribute value places regenerator.
3. according to the method described in claim 2, it is characterized in that, the maximum node of the determining attribute value place regenerator it
Afterwards, further includes:
Reacquire the OSNR of the M paths in the first set；
The path that OSNR in the first set is more than or equal to preset threshold is deleted, and the attribute value for resetting all nodes is initial
Value；
The number of repetition executed in the path of the node in the first aggregate is returned, determines the attribute value of each node.
4. according to the method described in claim 3, it is characterized in that, the method also includes:
If the first set is that empty or arbitrary node attribute value is all not more than 1, the road of condition is unsatisfactory for for remaining OSNR
Diameter places regenerator by greedy algorithm.
5. method according to claim 1-4, which is characterized in that the light noise for obtaining each path
Compare OSNR, comprising:
Optical signal to noise ratio OSNR is calculated according to formula (1)
Wherein, LiIt is the span loss that i-th of light puts section, NFiIt is the spontaneous emission noise coefficient of i-th of image intensifer, PoutiIt is
The output power of i-th of image intensifer, N are always to put number of segment.
6. a kind of device of determining regenerator placement location characterized by comprising
Module is obtained, the module that obtains is used to obtain the shortest path P in network between any two nodei,PiFor the i-th paths,
I is the integer more than or equal to 1, obtains the optical signal to noise ratio OSNR in all paths；
First set is added in determining module, the M paths that the determining module is used to for optical signal to noise ratio OSNR being less than preset threshold
In, M is positive integer；According to the number of repetition in the path of node in the first aggregate, the attribute value of each node is determined；According to
The attribute value of the node determines the placement location of regenerator.
7. device according to claim 6, which is characterized in that the determining module is also used to, and determines that attribute value is maximum
Node places regenerator.
8. device according to claim 7, which is characterized in that the acquisition module is also used to,
Reacquire the OSNR of the M paths in the first set；
The determining module is also used to, and is deleted OSNR in the first set and is more than or equal to the path of preset threshold, and resets institute
The attribute value for having node is initial value, returns to the number of repetition executed in the path of the node in the first aggregate, is determined every
The attribute value of a node.
9. device according to claim 8, which is characterized in that the determining module is also used to,
If the first set is that empty or arbitrary node attribute value is all not more than 1, the road of condition is unsatisfactory for for remaining OSNR
Diameter places regenerator by greedy algorithm.
10. according to the described in any item devices of claim 6-9, which is characterized in that the acquisition module is also used to,
The optical signal to noise ratio OSNR of each path is calculated according to formula (1)
Wherein, LiIt is the span loss that i-th of light puts section, NFiIt is the spontaneous emission noise coefficient of i-th of image intensifer, PoutiIt is
The output power of i-th of image intensifer, N are always to put number of segment.
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