CN106789646A - Service transmission path determines method and device - Google Patents
Service transmission path determines method and device Download PDFInfo
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- CN106789646A CN106789646A CN201611131851.5A CN201611131851A CN106789646A CN 106789646 A CN106789646 A CN 106789646A CN 201611131851 A CN201611131851 A CN 201611131851A CN 106789646 A CN106789646 A CN 106789646A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/12—Shortest path evaluation
- H04L45/123—Evaluation of link metrics
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
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Abstract
Determine method and device the invention discloses a kind of service transmission path.Wherein, the method includes:The information of the external factor of power telecom network is obtained, wherein, external factor is the factor of the communication link and communication equipment fault that can cause power telecom network;Information based on external factor determines the first risk parameter of interrupted communication link and communication equipment fault;The second risk parameter of service disconnection is determined according to the first risk parameter;Transmission path of the business in power telecom network is determined based on the second risk parameter.The present invention solves the technical problem of the service transmission path that cannot accurately determine in power telecom network.
Description
Technical field
The present invention relates to field of information processing, method and device is determined in particular to a kind of service transmission path.
Background technology
In the prior art, there is larger operation burden in business transmission, cause that business transmission can not accurately be found
The path of transmission, is power grid security, steady for example, power telecom network is responsible for the business such as the management of power industry, commander and scheduling
The fixed, important support of economical operation and guarantee.At present, China's power telecom network agent structure is optical fiber, and in body data net
The upper all generations of transmission, management business.These optical fiber be subjected to unavoidably in operation natural calamity, artificial destruction, ageing equipment and
The factors such as defective mounting influence, and cause communication system of power grids message interrupts, are delayed the time of accident treatment.Cause electric power in various inducements
When communication network breaks down, the grid nodes operation troubles being associated is not only resulted in, and also result in communication network operation
Service disconnection, further triggers the electric network fault related to communication event, such as communication abnormality cause unauthorized dispatching telephone,
Dispatch data net, route protection and automatic safety device channel interrupt.
In the prior art, the scheme of business risk prediction and searching service transmission path is as follows in power telecom network:
In an arrangement, there is provided a kind of communication Risk-warning towards communication system of power grids business and risk averse method,
The method includes communication Risk-warning process and risk averse process.Communication Risk-warning process is comprised the following steps:Optical fiber leads to
The risk parameter of letter equipment and optical-fibre channel quantifies to replicate;Operational authority is set according to the communication system of power grids business importance degree for being carried
Weight;Determine the communication risk and risk probability of business.Risk averse process is comprised the following steps:It is larger to communication threat probability values
And need to carry out the service communication passage of routing optimality, and prioritization is carried out according to the size that risk is present;Build time delay
Information matrix list;It is that the business for treating routing optimality that there is risk finds new business route.But to optical fiber communication equipment
Do not consider that external motivation etc. is constrained with the risk parameter quantization of optical-fibre channel, its probability of happening will also result in equipment and passage wind
The change of danger value, in turn results in the change of business risk.
In another scheme, there is provided service route selecting method and device in a kind of power telecom network.The method according to
The topological structure of power telecom network, to reach traffic assignments path, using Di j skt ra algorithms, gets the road up to business
Gather in footpath;Traverse path set, calculates the corresponding full-service risk in path, whole network risk, whole network load balancing degrees
With whole network risk balance degree;According to full-service risk, whole network risk and whole network load balancing degrees, to set of paths
Rejecting treatment is carried out, the All Paths in having traveled through set of paths obtain destination path set;If destination path set is non-
Sky, the then corresponding whole network risk balance degree of the every paths in destination path set, to destination path set Road footpath
Ascending order arrangement is carried out, the first paths of selection route as business;Make arrival business according to business routing forwarding message.The program
Do not consider the influence that external factor is produced to communication equipment and communication port, the value-at-risk of communication port and equipment can be caused to become
Change, and then business risk degree, network risks degree are impacted.
In another scheme, there is provided a kind of risk balance method and system of power telecom network, including:Obtain electric power
Nodal information, link information and business information in communication network;According to the information for obtaining, the corresponding multiple of each business is determined
Service path;An optional service path from multiple service paths, constitutes a business sheet set of paths respectively;According to acquisition
Information and at least one business sheet set of paths, determine the risk of each node and the risk of each link;Root
According to node risk and link risk, network risks degree is determined;Believed according at least one business sheet set of paths and business
Breath, determines offered load degree;According to network risks degree and offered load degree, using default service path Optimized model, obtain
To the path optimizing of each business.But the program is in the quantization of node and link risk, lacking and considering failure inducement pair
The influence of node and link, causes the change of node risk and link risk.
In another scheme, there is provided a kind of failure analysis methods and device based on power telecom network, including:Obtain
The historical data of failure to be analyzed in power telecom network, and according to historical data, obtain the corresponding failure that broken down and occur
Inducement species set;Each inducement species includes at least one inducement factor;For each inducement species, calculate and obtain wherein
The corresponding inducement probability of each inducement factor, and each corresponding weight of inducement factor is obtained according to probability, further according to what is obtained
Each corresponding weight of inducement factor, obtains the corresponding probability of malfunction of inducement species;According to each corresponding failure of inducement species
Probability, calculates the probability that failure to be analyzed may occur;If the probability that failure to be analyzed may occur is more than the first predetermined threshold value,
The corresponding weight of inducement factor in probability and each inducement species according to each corresponding failure of inducement species, according to from big
To small order, investigation treatment is carried out successively.After the program is by obtaining the corresponding probability of malfunction of all kinds of inducement factors, calculate
The probability that failure to be analyzed may occur, but only consider the probability that different types of inducement causing trouble occurs, lack and consider such as
What may cause the analysis of link or node interrupts risk to failure using the fault rate, in further having influence on network
The transmission risk of business.
In sum, the assessment shortage consideration at present in existing patent of invention to the business risk degree of power telecom network sets
Influence of the standby and link failure inducement to carrying business, also lacks the importance degree for considering link and node sheet in communication network,
Or the probability of happening of external motivation causing trouble is only considered, lack the influence considered to business risk, therefore calculating industry
Also these factors are taken into account during business risk.
For the above-mentioned problem that cannot accurately determine the service transmission path in power telecom network, not yet propose have at present
The solution of effect.
The content of the invention
The embodiment of the invention provides a kind of service transmission path and determine method and device, so that at least solve cannot be accurately true
Determine the technical problem of the service transmission path in power telecom network.
One side according to embodiments of the present invention, there is provided a kind of service transmission path determines method, including:Obtain electricity
The information of the external factor of power communication network, wherein, the external factor is the communication link that can cause the power telecom network
With the factor of communication equipment fault;Information based on the external factor determines the interrupted communication link and communication equipment fault
The first risk parameter;The second risk parameter of service disconnection is determined according to first risk parameter;Based on second wind
Transmission path of the business in the power telecom network described in dangerous parameter determination.
Further, the external factor is multiple, and the information for obtaining the external factor of power telecom network includes:Obtain each
The individual external factor makes the probability of happening that the power telecom network breaks down;The electric power is determined based on the probability of happening
The probability that communication network breaks down, wherein, the information of the external factor makes the power telecom network including the external factor
The probability for breaking down.
Further, the external factor includes:Natural cause, human factor and apparatus factor, wherein, obtain each
The external factor includes the probability of happening that the power telecom network breaks down:Natural cause i is obtained by the first formula
Make the probability of happening p that the power telecom network breaks down in moment tiT (), first formula is:
Wherein, ni(t) represent natural cause i time interval (- ∞, t) in make it is described
The number of times that power telecom network breaks down, diRepresent the destruction grade in moment t natural cause, f (di) represent natural cause i's
In grade diUnder influence, N represents the total quantity of natural cause;Made in moment t by the second formula acquisition apparatus factor i described
The probability of happening p that power telecom network breaks downiT (), second formula is:Wherein, TiIt is pre- timing
It is long;Obtain human factor i by the 3rd formula makes the probability of happening p that the power telecom network breaks down in moment ti(t), institute
Stating the 3rd formula is:Wherein, λiRepresent the average arrival rate of human factor i, niT () represents human factor i
In time interval (- ∞, t) the interior number of times for making the power telecom network break down.
Further, determine that the probability that the power telecom network breaks down includes based on the probability of happening:By the 4th
Power telecom network described in formula breaks down GjProbabilityWherein, the 4th formula is:
Wherein, FGRepresent the set of external factor species, the external factor species set FGIn each factor species set FkIn it is external
Factor breaks down GjProbability of happening be
Further, the information based on the external factor determines the of the interrupted communication link and communication equipment fault
One risk parameter includes:According to following formula, the information based on the external factor is determined in t communication link eijInterrupt
Value-at-riskWherein,Wherein,Represent t communication link eijThe probability of happening of interruption,
The information of the external factor includes t communication link eijThe probability of happening of interruption,Represent communication link eijMade after interruption
Into risk schedule value, It is the importance degree of communication link, business skBusiness importance degree be dk, often
It is n to plant number of servicesk;According to following formula, the information based on the external factor is determined in t device node viInterrupt
Value-at-riskWherein,Represent in t device node viThe probability of happening of failure, it is described
The information of external factor includes t device node viThe probability of happening of failure,Represent device node viRisk after failure
Consequence value, It is device node importance degree, wherein, first risk parameter is included in t equipment
Node viThe value-at-risk of interruptionWith in t communication link eijThe value-at-risk of interruption
Further, the second risk parameter for determining service disconnection according to first risk parameter includes:By business s warps
The path w for crossingkThe accumulated value of the value-at-risk of upper each device node and communication link is defined as the disruption risk value of the business sWherein, second risk parameter includes the disruption risk value
Further, transmission path of the business in the power telecom network is determined based on second risk parameter
Including:From the power telecom network, the minimum path of the terminal value-at-risk of transmission services s is chosen, existed with obtaining the business s
Transmission path in the power telecom network.
Another aspect according to embodiments of the present invention, additionally provides a kind of service transmission path determining device, including:Obtain
Unit, the information of the external factor for obtaining power telecom network, wherein, the external factor is led to for that can cause the electric power
Believe the communication link of net and the factor of communication equipment fault;First determining unit, it is true for the information based on the external factor
First risk parameter of the fixed interrupted communication link and communication equipment fault;Second determining unit, for according to described first
Risk parameter determines the second risk parameter of service disconnection;3rd determining unit, for being determined based on second risk parameter
Transmission path of the business in the power telecom network.
Further, the external factor is multiple, and the acquiring unit includes:Acquisition module, for obtaining each institute
State the probability of happening that external factor makes the power telecom network break down;First determining module, for being occurred generally based on described
Rate determines the probability that the power telecom network breaks down, wherein, the information of the external factor makes including the external factor
The probability that the power telecom network breaks down.
Further, second determining unit includes:Second determining module, for the path w for passing through business skOn
The accumulated value of the value-at-risk of each device node and communication link is defined as the disruption risk value of the business sWherein, it is described
Second risk parameter includes the disruption risk value
In embodiments of the present invention, it is possible to achieve outer based on this after the information of external factor of power telecom network is obtained
Determine the first risk parameter of interrupted communication link and communication equipment fault in the information of factor, wherein, external factor is can
Cause the communication link of power telecom network and the factor of communication equipment fault;After the first risk parameter is determined, can basis
First risk parameter determines the second risk parameter of service disconnection, it is then possible to being based on second risk parameter determines that business exists
Transmission path in power telecom network.According to embodiments of the present invention, break in a communication link during with communication equipment failure, can
With by getting the external factor for causing that interrupted communication link or communication equipment break down, so that it is determined that going out the first risk ginseng
Number, and finally determine transmission path of the business in power telecom network.Solution cannot accurately determine the industry in power telecom network
The technical problem of transmission path of being engaged in, has reached in power telecom network interrupted communication link or communication equipment fault, promptly and accurately
The effect for determining service transmission path.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings:
Fig. 1 is the flow chart that a kind of optional service transmission path according to embodiments of the present invention determines method;
Fig. 2 is the topological diagram of the optional service transmission path of another kind according to embodiments of the present invention;And
Fig. 3 is the structure chart of the optional service transmission path determining device of another kind according to embodiments of the present invention.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, should all belong to the model of present invention protection
Enclose.
It should be noted that term " first ", " in description and claims of this specification and above-mentioned accompanying drawing
Two " it is etc. for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so using
Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating herein or
Order beyond those of description is implemented.Additionally, term " comprising " and " having " and their any deformation, it is intended that cover
Lid is non-exclusive to be included, for example, the process, method, system, product or the equipment that contain series of steps or unit are not necessarily limited to
Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product
Or other intrinsic steps of equipment or unit.
According to embodiments of the present invention, there is provided a kind of embodiment of the method that service transmission path determines, it is necessary to explanation,
Can be performed in the such as one group computer system of computer executable instructions the step of the flow of accompanying drawing is illustrated, and
And, although logical order is shown in flow charts, but in some cases, can perform institute with different from order herein
The step of showing or describe.
The term in the present invention is explained below:
Dijkstra's algorithm:It is the shortest path first from a summit to remaining each summit, solution is digraph
Shortest route problem.Be mainly characterized by centered on starting point outwards extending layer by layer, until expanding to terminal untill.
Poisson distribution:It is the discrete probability distribution in a kind of statistics and Probability, if stochastic variable X is possible to the value for taking
It is 0,1,2 ..., and probability distribution is:Wherein a>0 is constant, then it is called Poisson distribution that X obeys parameter, is denoted as X-P (a).
Fig. 1 is the flow chart that a kind of optional service transmission path according to embodiments of the present invention determines method, such as Fig. 1 institutes
Show, the method comprises the following steps:
Step S102, obtains the information of the external factor of power telecom network, wherein, external factor is led to for that can cause electric power
Believe the communication link of net and the factor of communication equipment fault;
Step S104, the information based on external factor determines the first risk ginseng of interrupted communication link and communication equipment fault
Number;
Step S106, the second risk parameter of service disconnection is determined according to the first risk parameter;
Step S108, transmission path of the business in power telecom network is determined based on the second risk parameter.
By above-described embodiment, it is possible to achieve external based on this after the information of external factor of power telecom network is obtained
The information of factor determines the first risk parameter of interrupted communication link and communication equipment fault, wherein, external factor is to draw
Play the communication link of power telecom network and the factor of communication equipment fault;After the first risk parameter is determined, can be according to
One risk parameter determines the second risk parameter of service disconnection, determines business in electricity it is then possible to be based on second risk parameter
Transmission path in power communication network.According to embodiments of the present invention, break in a communication link and when communication equipment breaks down, can be with
By getting the external factor for causing that interrupted communication link or communication equipment break down, so that it is determined that going out the first risk ginseng
Number, and finally determine transmission path of the business in power telecom network.Solution cannot accurately determine the industry in power telecom network
The technical problem of transmission path of being engaged in, has reached in power telecom network interrupted communication link or communication equipment fault, promptly and accurately
The effect for determining service transmission path.
Optionally, external factor can be multiple, and the information for obtaining the external factor of power telecom network includes:Obtain each
External factor makes the probability of happening that power telecom network breaks down;Determine that power telecom network breaks down based on probability of happening general
Rate, wherein, the information of external factor makes the probability that power telecom network breaks down including external factor.
Optionally, because power communication line is laid along power circuit, communication node is configured in power node, power network and electricity
It is one-to-one coupling between power communication network, then the topological structure of power telecom network and the topological structure of power network are identical.Optionally, may be used
To define the topology that figure G (V, E) represents communication network, wherein V represents the set of device node, and E represents the set of communication link.
Another optional, external factor includes:Natural cause, human factor and apparatus factor, wherein, obtain each
External factor includes the probability of happening that power telecom network breaks down:Obtain natural cause i by the first formula makes in moment t
The probability of happening p that power telecom network breaks downiT (), the first formula is:
Wherein, ni(t) represent natural cause i time interval (- ∞, t) in make electric power
The number of times that communication network breaks down, diRepresent the destruction grade in moment t natural cause, f (di) represent waiting for natural cause i
Level diUnder influence, N represents the total quantity of natural cause;Obtain apparatus factor i by the second formula makes power communication in moment t
The probability of happening p that net breaks downiT (), the second formula is:Wherein, TiIt is scheduled duration;It is public by the 3rd
Formula obtains human factor i makes the probability of happening p that power telecom network breaks down in moment tiT (), the 3rd formula is:Wherein, λiRepresent the average arrival rate of human factor i, ni(t) represent human factor i time interval (-
∞, t) the interior number of times for making power telecom network break down.
For the external factor that can cause power telecom network communication link and communication equipment fault, can be divided into nature because
Element, apparatus factor and human factor etc., for different types of external factor, set up different Mathematical Modelings and are quantified.
Wherein, for the natural cause in external factor, i is could be arranged to, in time interval (- ∞, t), if it occurs
Number of times be niT (), all natural causes constitute set N={ i }, because the different grades of destructive power of natural cause differs
Sample, and the difference between rank often exponentially increases, if the grade of moment t natural cause is di, then natural cause i
The probability of happening p of moment tiT () is:
Wherein f (di) it is natural cause i in grade diUnder influence.Wherein, first formula of above-described embodiment can be
The formula (1).Natural cause often reaches certain level special talent can produce influence.
Optionally, can be by f (di) be defined as follows:
WhereinIt is the start level of influence,It is the greatest level of agreement, general grade higher, influences bigger.If
Current factor i does not occur, and makes di=0.
Another optional implementation method, for the apparatus factor in external factor, because equipment cable is aging in itself, scarce
Fall into may be considered change over time and there may be decay, then to apparatus factor i, in time interval (- ∞, t) Nei Qifa
Raw Probability piT () is to formulate duration TiThe exponential function in (such as life-span), can be expressed as:
Another optional implementation method, for the human factor in external factor, wherein, the second of above-described embodiment is public
Formula can be the formula (3).I will can be artificially set to, it is n equally to set its frequency in time intervali(t), due to artificial
Factor is often chance event, it is believed that its generating process meets Poisson distribution, then the probability of happening p of human factor ii(t)
For:
In the formula that formula (4) is represented, λiIt is the average arrival rate of human factor i, wherein, the 3rd of above-described embodiment the
Formula can be the formula (4).
Another optional implementation method, for determining the probability packet that power telecom network breaks down based on probability of happening
Include:Broken down G by the 4th formula power telecom networkjProbabilityWherein, the 4th formula is:Wherein, FGRepresent the set of external factor species, external factor species set FGIn each because
Plain species set FkMiddle external factor breaks down GjProbability of happening be
Optionally, if the sum for causing the external factor of a certain link or equipment fault is M, factor species is nf, own
External factor constitutes set F={ Fk, wherein { FkThe set that different types of external factor is constituted is represented respectively, and by hk
Individual external factor composition.Then there is following relation:
Assuming that it is separate between all kinds of factors, and in same kind of sets of factors, there is mutual exclusion between factor
And compatibility relation.Wherein, the 4th formula of above-described embodiment can be the formula (5).
Optionally, for failure Gj(including link and node failure), by historical data and empirical analysis, can obtain
The external factor species set F that it may be caused to occurGWith the material elements i in set.If the probability of happening of failure isFactor species set FGThe probability of happening of middle factor species k isThen for failure Gj, its probability of happening is:
Optionally, the information based on external factor determines the first risk parameter of interrupted communication link and communication equipment fault
Including:According to following formula, the information based on external factor is determined in t communication link eijThe value-at-risk of interruptionIts
In,Wherein,Represent t communication link eijThe probability of happening of interruption, the information of external factor
Including t communication link eijThe probability of happening of interruption,Represent communication link eijThe risk schedule value caused after interruption, It is the importance degree of communication link, business skBusiness importance degree be dk, every kind of number of services is nk;
According to following formula, the information based on external factor is determined in t device node viThe value-at-risk of interruptionWherein,Represent in t device node viThe probability of happening of failure, external factor
Information includes t device node viThe probability of happening of failure,Represent device node viRisk schedule value after failure, It is device node importance degree, wherein, the first risk parameter is included in t device node viInterrupt
Value-at-riskWith in t communication link eijThe value-at-risk of interruption
A kind of optional implementation method, risk typically refers to the uncertainty whether failure occurs, and is typically expressed as generation
Probability and the product lost.Therefore interrupted communication link is expressed as the value-at-risk of interrupted communication link and equipment fault (to set
Standby failure) risk=interruption (failure) probability × interruption (failure) risk schedule value.For interrupted communication link and equipment fault
Probability is calculated in can utilizing the external motivation for proposing before and the analysis of equipment fault relation;And interrupt the wind with failure
Dangerous consequence value is related to the importance degree of the importance degree, number of services and link and node itself of link bearer traffic.
Optionally, the collection of services for being carried on link and node is S={ sk, a total k kind business, business skBusiness
Importance degree is dk, every kind of number of services is nk。
Wherein, for communication link eijThe calculating of the value-at-risk of interruption, can obtain t, communication link by formula (6)
eijThe probability of happening of interruptionFor:
Communication link eijThe risk schedule value caused after interruptionFor:
In formula (8),It is the importance degree of communication link itself.Then in t, the link down value-at-risk
The probability of interrupted communication link generation can be expressed asWith the risk schedule value of interrupted communication linkProduct, it is public
Formula can be:
Optionally, for device node viThe value-at-risk of failure, can obtain t, device node v by formula (6)iTherefore
The probability of happening of barrierFor:
So as to obtain, device node viRisk schedule value after failure isFor:
In formula (11),It is device node importance degree.In t, the value-at-risk of device node failureCan be with
For:
Optionally, the second risk parameter for determining service disconnection according to the first risk parameter includes:The road that business s is passed through
Footpath wkThe accumulated value of the value-at-risk of upper each device node and communication link is defined as the disruption risk value of business sWherein, second
Risk parameter includes disruption risk value
Here is a kind of specific embodiment of the invention.
Because business is always transmitted between website and website, and to I haven't seen you for ages by a communication in transmitting procedure
Link, when there is link down or device node failure, the transmission of business will be interrupted, the operation to whole power telecom network
Impact, or even the communication security event of power network can be caused to occur.Therefore service disconnection risk transmits passed through chain with it
Transportation work style nearly can be related to node risk.Assuming that communication link and device node alternately connect composition path w, business s warp successively
The all set of paths crossed are W={ wk, a total k paths, wk={ Vk,Ek|vi∈Vk,eij∈Ek, path wkUpper equipment
Node number is | Vk|, link number is | Ek|.For the path w that service disconnection value-at-risk, the application are passed through in business skIt is upper each
The accumulated value of node and link value-at-risk is business s disruption risk valuesI.e.:
Another optional implementation method, transmission path of the business in power telecom network is determined based on the second risk parameter
Including:From power telecom network, the minimum path of the terminal value-at-risk of transmission services s is chosen, to obtain business s in power communication
Transmission path in net.
Here is a kind of specific embodiment, for the business risk value being calculated, in the network of power telecom network
This business minimum risk value in the transmission is found in topological G (V, E), as alternate routing.In this embodiment, with
Based on dijkstra's algorithm, junction link and node value-at-risk, finding the optimal path of business s makes business risk value minimum,
Shown in comprising the following steps that,:
Step 201:Initialization, S={ src }, S is the node set of the least risk value obtained, and src is source point,
Dstn is purpose node.
Step 203:The node set that Q=V-S is not yet calculation risk minimum value is defined, V is all in network topology
Node set.
Step 205:To vz∈ Q, z ∈ { 1,2 ..., k }, d (vz) it is node vzThe distance to source point src, if vzWith source
Point is adjacent, thenIf non-conterminous, d (vz)=∞.D (src)=0,WithNode v is represented respectivelyi
And the side between its abutment points uValue-at-risk, will node value-at-risk and link value-at-risk sum as weights, vi,u∈
Q, its computational methods are shown in formula (9) to formula (12).
Step 207:A d (v is chosen from set Qz) minimum node vz, and by vzIn addition set S, Q=Q-
{vz, Route (vz)={ src } ∪ { vz}。
Step 209:With vzIt is the new intermediate point for considering, the distance of each node in modification Q;If from source point src by node vz
Distance to node u (u ∈ Q) is than originally without node vzDistance it is short, then change the distance value of node u, it is amended away from
From value.
Step 211:Step S207 and step S209 is repeated, in destination node dstn is added into S, i.e. dstn
Untill ∈ S, that is, the route Route (dstn) of the minimum risk value of source point src to destination node dstn is obtained.
By above-described embodiment, it is possible to use it is minimum that Routing Optimization Algorithm finds business risk value in business network topology
Path, alternative path that can be using the path as business in a network.It is right according to the feature of different types of external factor
Natural cause, apparatus factor and human factor cause link and the probability of happening of equipment fault to be modeled respectively and comprehensive,
And obtain the fault rate of equipment.The embodiment of the present invention can be defined according to risk, in combination with link importance degree, node
Importance degree and business importance degree, define link and node value-at-risk, so that it is determined that going out the Mathematical Modeling of business risk value.
Fig. 2 is the topological diagram that the optional service transmission path of another kind according to embodiments of the present invention determines method, such as Fig. 2
It is shown, emulated under the topology close to existing network.Wherein, C1 represents control centre, and A1 to A4 represents 500KV websites, B1
220KV websites are represented to B4, the optical fiber of 500KV are connected between 500KV websites, 220KV optical fiber is connected between 200KV websites,
The optical fiber of 220KV is connected between 500KV websites and 200KV websites.9 nodes (3 kinds of site levels, control are had in the topological diagram
Center processed is superior to 500KV websites, and the grade of 500KV websites is higher than 220KV), and 12 links (optical cable), in Fig. 2
Sequence number 1-12 represent an optical cable respectively.Existing 4 relay protection business are laid in the network architecture.
Wherein, when link and node failure probability of happening is calculated, it is assumed that current network link 5 (A1-B1) is due to people
Broken down for operational error and according to will there is strong weather, make whole communication network suffer it is huge threaten,
The fault rate of assessment whole network link and node is now needed, and calculates the risk in existing business path, be given
Optimizing Suggestions.
First according to the information for prestoring, classification and the set of the failure factor being associated with failure are listed, wherein therefore
Natural cause in barrier factor includes:Ice disaster, high wind and heavy rain etc.;Apparatus factor:Natural aging;Human factor:Move
Dynamic optical fiber and construction dig disconnected etc..By the analysis to above-mentioned failure factor, the hair of the failure factor of link fiber interruption will be caused
Raw number of times can be set 1000 times, and wherein ice disaster is set to 10 times, and high wind is set to 8 times, and heavy rain is set to 12 times, moves
Optical fiber is set 5 times, and it is inferior that disconnected setting 20 is dug in construction.
Fault rate caused by natural cause is analyzed first, if the rank degree of ice disaster and the classification one avenged
Cause, be 1-6 grades (for example, slight snow, moderate snow, heavy snow, severe snow, storm snow, Very heavy storm), monsoon intensity is divided into 0-12 grades (for example, nothing
Wind, light air, light breeze, gentle breeze and wind, fresh breeze, high wind, strong wind, strong wind, strong gale, blast, storm wind, typhoon), rainfall degree is 1-7
Level (for example, light rain, moderate rain, heavy rain, heavy rain, torrential rain, extra torrential rain).If the initial effects grade of ice and snow is 2 grades, rainfall shadow
It is 4 grades to ring grade, and high wind is 6 grades, now positive to meet with 5 grades of storm snows and 8 grades of strong wind risks.Can then be obtained according to formula (1) (2)
It is respectively to Three natures factor causing trouble probability of happening:0.333e-1, 0.267e-4, 0.
Optionally, for apparatus factor, if its use time is 3 years, service life is 10 years, can be with according to formula (3)
Fault rate is obtained for 1-e-0.3。
Optionally, for human factor, if move optical fiber and construction is dug disconnected arrival rate and is respectively 0.001 and 0.002, and
It is current to move optical fiber presence, without construction, then it is respectively according to fault rate caused by formula (4) (5) human factor:1-
e-0.005, 0.
The fault rate that link 5 (A1-B1) is obtained using above-described embodiment formula (7) is 0.356, i.e., in current shape
Under condition, the probability that fiber failure occurs is very high, it is necessary to troubleshooting personnel pays close attention to, and dependent failure is investigated.
Another optional implementation method, when business risk model is set up, can first determine outgoing link and node risk
Value.
Because link 5 (A1-B1) is 220KV optical fiber, link importance degree is 1.25, has 1 relay protection business and passes through
The link, the importance degree of relay protection business is 10, and it is 0.356 that previous step is calculated the fault rate of link 5, then
The risk of the link is 1.25 × 10 × 1 × 0.356=4.45.
By that analogy, each node value-at-risk of the network can be obtained, as shown in table 1:
Table 1
According to it is above-mentioned be it is reasonable, the value-at-risk of each link of the network can also be obtained, as shown in table 2:
Table 2
Optionally, it is determined that during business risk value, there is 4 relay protection business, respectively w in the network1:A1-B1-
C1-B3;w2:A2-B2-B1-C1;w3:B4-A4-A2-A1;w4:A4-A3-B3-C1.For w1For, the wind of each node and link
Danger value can be obtained by inquiry in upper table, then the value-at-risk of this business is 16.058+12.804+91.124+12.804+4.450+
43.242+43.242=223.724.
Another optional implementation method, in route optimization process, it is possible to use Routing Optimization Algorithm, with value-at-risk most
Small is optimization aim, and to A1 as starting point, B3 carries out routing optimality for the business of terminal, the business route after being optimized is
A1-A3-B3, the business risk value of the route is 16.058+8.029+12.802+0+4.450=41.339, less than original route
Business risk value, then can select the route as the alternate routing of business A1-B3.
By above-described embodiment, in the case where considering that external motivation link causes node failure to occur, the present invention is implemented
Example proposes the risk model of a consideration pitch point importance, link importance degree and business importance degree, and in the base of the model
A kind of Routing Optimization Algorithm is proposed on plinth.The characteristics of firstly, for different types of external factor, set up natural cause, set
Standby factor and human factor cause the probability that equipment fault occurs;Secondly pitch point importance, link importance degree and business are combined
Importance degree and number, define the risk schedule value of link and node failure;Then can be defined according to risk, combination failure occurs
Probability and risk schedule value, obtain the value-at-risk of node and link, so as to obtain business risk value;Finally it is directed to business risk
Value, using Routing Optimization Algorithm, can obtain the minimum alternate routing of business risk value.
Fig. 3 is the structure chart of the optional service transmission path determining device of another kind according to embodiments of the present invention, such as Fig. 3
Shown, the device includes:Acquiring unit 31, the information of the external factor for obtaining power telecom network, wherein, external factor is
The communication link of power telecom network and the factor of communication equipment fault can be caused;First determining unit 33, for based on external
The information of factor determines the first risk parameter of interrupted communication link and communication equipment fault;Second determining unit 35, for root
The second risk parameter of service disconnection is determined according to the first risk parameter;3rd determining unit 37, for based on the second risk parameter
Determine transmission path of the business in power telecom network.
By above-described embodiment, can by after the information of the external factor that acquiring unit 31 obtains power telecom network, and
The first wind of interrupted communication link and communication equipment fault is determined by the first information of the determining unit 33 based on the external factor
Dangerous parameter, wherein, external factor is the factor of the communication link and communication equipment fault that can cause power telecom network;It is determined that
After going out the first risk parameter, the second wind of service disconnection can be determined according to first risk parameter by the second determining unit 35
Dangerous parameter, determines business in power telecom network it is then possible to pass through the 3rd determining unit 37 based on second risk parameter
Transmission path.According to embodiments of the present invention, break in a communication link during with communication equipment failure, can be by acquiring unit
31 get the external factor for causing that interrupted communication link or communication equipment break down, so that true by the first determining unit 33
The first risk parameter is made, and finally determines transmission path of the business in power telecom network.Solution cannot accurately determine electricity
The technical problem of the service transmission path in power communication network, has reached in power telecom network interrupted communication link or communication equipment event
During barrier, the effect for determining service transmission path promptly and accurately.
Optionally, external factor is multiple, and acquiring unit includes:Acquisition module, electricity is made for obtaining each external factor
The probability of happening that power communication network breaks down;First determining module, for determining that power telecom network occurs event based on probability of happening
The probability of barrier, wherein, the information of external factor makes the probability that power telecom network breaks down including external factor.
Another optional implementation method, the second determining unit includes:Second determining module, for pass through business s
Path wkThe accumulated value of the value-at-risk of upper each device node and communication link is defined as the disruption risk value of business sWherein,
Two risk parameters include disruption risk value
Optionally, external factor includes:Natural cause, human factor and apparatus factor, wherein, acquisition module includes:
First acquisition submodule, the generation that power telecom network breaks down is made for obtaining natural cause i by the first formula in moment t
Probability piT (), the first formula is:Wherein, ni(t) represent natural cause i time interval (-
∞, t) the interior number of times for making power telecom network break down, diRepresent the destruction grade in moment t natural cause, f (di) represent certainly
Right factor i in grade diUnder influence, N represents the total quantity of natural cause;Second acquisition submodule, for public by second
Formula obtains apparatus factor i makes the probability of happening p that power telecom network breaks down in moment tiT (), the second formula is:Wherein, TiIt is scheduled duration;3rd acquisition submodule, for by the 3rd formula obtain human factor i when
Carve the probability of happening p that t makes power telecom network break downiT (), the 3rd formula is:Wherein, λiRepresent people
It is the average arrival rate of factor i, ni(t) represent human factor i time interval (- ∞, t) in power telecom network is broken down
Number of times.
Another optional implementation method, the first determining module includes:Determination sub-module, for being determined by the 4th formula
Power telecom network breaks down GjProbabilityWherein, the 4th formula is:Wherein, FG
Represent the set of external factor species, external factor species set FGIn each factor species set FkThere is event in middle external factor
Barrier GjProbability of happening be
Optionally, the first determining unit includes:3rd determining module, for according to following formula, based on external factor
Information is determined in t communication link eijThe value-at-risk of interruptionWherein,Wherein,Represent
T communication link eijThe probability of happening of interruption, the information of external factor includes t communication link eijThe generation of interruption is general
Rate,Represent communication link eijThe risk schedule value caused after interruption, It is important for communication link
Degree, business skBusiness importance degree be dk, every kind of number of services is nk;4th determining module, for according to following formula, being based on
The information of external factor is determined in t device node viThe value-at-risk of interruptionWherein,Represent in t device node viThe probability of happening of failure, the information of external factor includes t device node viFailure
Probability of happening,Represent device node viRisk schedule value after failure, For device node is important
Degree, wherein, the first risk parameter is included in t device node viThe value-at-risk of interruptionWith in t communication link eij
The value-at-risk of interruption
Optionally, the 3rd determining unit includes:Module is chosen, for from power telecom network, choosing the end of transmission services s
The minimum path of end value-at-risk, to obtain transmission paths of the business s in power telecom network.
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in certain embodiment
The part of detailed description, may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents, can be by other
Mode is realized.Wherein, device embodiment described above is only schematical, such as division of described unit, Ke Yiwei
A kind of division of logic function, can there is other dividing mode when actually realizing, such as multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be the INDIRECT COUPLING or communication link of unit or module by some interfaces
Connect, can be electrical or other forms.
The unit that is illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can be according to the actual needs selected to realize the purpose of this embodiment scheme.
In addition, during each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is to realize in the form of SFU software functional unit and as independent production marketing or use
When, can store in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part for being contributed to prior art in other words or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are used to so that a computer
Equipment (can be personal computer, server or network equipment etc.) perform each embodiment methods described of the invention whole or
Part steps.And foregoing storage medium includes:USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with store program codes
Medium.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of service transmission path determines method, it is characterised in that including:
The information of the external factor of power telecom network is obtained, wherein, the external factor is that can cause the power telecom network
Communication link and communication equipment fault factor;
Information based on the external factor determines the first risk parameter of the interrupted communication link and communication equipment fault;
The second risk parameter of service disconnection is determined according to first risk parameter;
Transmission path of the business in the power telecom network is determined based on second risk parameter.
2. method according to claim 1, it is characterised in that the external factor is multiple, obtains power telecom network
The information of external factor includes:
Obtain the probability of happening that each described external factor makes the power telecom network break down;
The probability that the power telecom network breaks down is determined based on the probability of happening, wherein, the information of the external factor
Make the probability that the power telecom network breaks down including the external factor.
3. method according to claim 2, it is characterised in that the external factor includes:Natural cause, human factor with
And apparatus factor, wherein, obtaining each described external factor includes the probability of happening that the power telecom network breaks down:
Obtain natural cause i by the first formula makes the probability of happening p that the power telecom network breaks down in moment ti(t), institute
Stating the first formula is:
Wherein, ni(t) represent natural cause i time interval (- ∞, t) in make the electric power
The number of times that communication network breaks down, diRepresent the destruction grade in moment t natural cause, f (di) represent waiting for natural cause i
Level diUnder influence, N represents the total quantity of natural cause;
Obtain apparatus factor i by the second formula makes the probability of happening p that the power telecom network breaks down in moment ti(t), institute
Stating the second formula is:Wherein, TiIt is scheduled duration;
Obtain human factor i by the 3rd formula makes the probability of happening p that the power telecom network breaks down in moment ti(t), institute
Stating the 3rd formula is:Wherein, λiRepresent the average arrival rate of human factor i, niT () represents human factor i
In time interval (- ∞, t) the interior number of times for making the power telecom network break down.
4. method according to claim 2, it is characterised in that the power telecom network hair is determined based on the probability of happening
The probability of raw failure includes:
Broken down G by power telecom network described in the 4th formulajProbabilityWherein, the 4th formula is:Wherein, FGRepresent the set of external factor species, the external factor species set FGIn it is each
Individual factor species set FkMiddle external factor breaks down GjProbability of happening be
5. method according to claim 1, it is characterised in that the information based on the external factor determines the communication chain
Road is interrupted and the first risk parameter of communication equipment fault includes:
According to following formula, the information based on the external factor is determined in t communication link eijThe value-at-risk of interruption
Wherein,Wherein,Represent t communication link eijThe probability of happening of interruption, the external factor
Information include t communication link eijThe probability of happening of interruption,Represent communication link eijThe risk schedule caused after interruption
Value, It is the importance degree of communication link, business skBusiness importance degree be dk, every kind of number of services is
nk;
According to following formula, the information based on the external factor is determined in t device node viThe value-at-risk of interruption Wherein,Represent in t device node viThe probability of happening of failure, the letter of the external factor
Breath includes t device node viThe probability of happening of failure,Represent device node viRisk schedule value after failure, It is device node importance degree,
Wherein, first risk parameter is included in t device node viThe value-at-risk of interruptionWith in t communication chain
Road eijThe value-at-risk of interruption
6. method according to claim 1, it is characterised in that determine the of service disconnection according to first risk parameter
Two risk parameters include:
The path w that business s is passed throughkThe accumulated value of the value-at-risk of upper each device node and communication link is defined as the business s's
Disruption risk valueWherein, second risk parameter includes the disruption risk value
7. method according to claim 1, it is characterised in that determine the business in institute based on second risk parameter
The transmission path stated in power telecom network includes:
From the power telecom network, the minimum path of the terminal value-at-risk of transmission services s is chosen, existed with obtaining the business s
Transmission path in the power telecom network.
8. a kind of service transmission path determining device, it is characterised in that including:
Acquiring unit, the information of the external factor for obtaining power telecom network, wherein, the external factor is can to cause institute
State the communication link of power telecom network and the factor of communication equipment fault;
First determining unit, the interrupted communication link and communication equipment fault are determined for the information based on the external factor
The first risk parameter;
Second determining unit, the second risk parameter for determining service disconnection according to first risk parameter;
3rd determining unit, for determining transmission of the business in the power telecom network based on second risk parameter
Path.
9. device according to claim 8, it is characterised in that the external factor is multiple, the acquiring unit includes:
Acquisition module, for obtaining the probability of happening that each described external factor makes the power telecom network break down;
First determining module, for determining the probability that the power telecom network breaks down based on the probability of happening, wherein, institute
Stating the information of external factor includes the probability that the external factor makes the power telecom network break down.
10. device according to claim 8, it is characterised in that second determining unit includes:
Second determining module, for the path w for passing through business skThe accumulated value of the value-at-risk of upper each device node and communication link
It is defined as the disruption risk value of the business sWherein, second risk parameter includes the disruption risk value
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CN110197305A (en) * | 2019-05-31 | 2019-09-03 | 国家电网有限公司 | A kind of relay protection data model chess game optimization method and system based on shortest path first |
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