CN110035334A - A kind of power telecom network dynamically bandwidth resource optimization method - Google Patents
A kind of power telecom network dynamically bandwidth resource optimization method Download PDFInfo
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- CN110035334A CN110035334A CN201910133287.8A CN201910133287A CN110035334A CN 110035334 A CN110035334 A CN 110035334A CN 201910133287 A CN201910133287 A CN 201910133287A CN 110035334 A CN110035334 A CN 110035334A
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- H—ELECTRICITY
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- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
This application discloses a kind of power telecom network dynamically bandwidth resource optimization methods, suitable for distribution network communication system, this method comprises: step 1 distributes the first bandwidth of optical line terminal and the second bandwidth of optical network unit according to the resource authorization application of metropolitan area net controller and access network controller；Step 2, according to variable polling cycle, the real-time network flow for the optical network unit for including in optical line terminal is detected, and calculates the threshold factor of optical network unit；Step 3, when the decision threshold factor is equal to 0, according to the first bandwidth, the second bandwidth and real-time network flow, the bandwidth optimization strategy of distribution network communication system is generated, wherein, bandwidth optimization strategy includes the terminal bandwidth optimisation strategy of optical line terminal and the unit bandwidth optimization strategy of optical network unit.By the technical solution in the application, solves the problems, such as that optical access network bandwidth allocation real-time is poor, there are limitations, realize the real-time synchronization of bandwidth allocation and changes in flow rate.
Description
Technical field
This application involves the technical fields of Distribution Network Communication, provide in particular to a kind of power telecom network dynamic bandwidth
Source optimization method.
Background technique
Power distribution communication net is the important content of state grid corporation of smart grid construction, and it is automatic that distribution is carried out in various regions extensively
The distribution operation system construction such as change, Power Quality Detection, distribution transforming real-time detection, distributed energy access, and push and mutually fit therewith
That answers builds with network communication system, basically forms that Ethernet passive optical network (EPON), Industrial Ethernet, wireless, carrier wave is compound
The technology path of networking effectively supports the operation of all kinds of intelligent power distribution business.
Exactly in this context, the programmable centralized control type control technology currently risen is gradually by electric system
Receive and accepts.The control plane that logic programmable is concentrated can support the flexible dispatching of powerline network resource；Flexibly
Open interface can support the on-demand calling of its function；The unified southbound interface of standard can be realized the virtual transparent of equipment；
And the combination of network virtualization technology and software defined network can satisfy different departments and business to isolation and safety
Demand.By fused controlling to physical network and virtual network and management, intelligence and quick power distribution communication net are realized,
Help to change the static status of existing power distribution communication network, and becomes with by the main website mobilism of representative of server field
Gesture matches, and effectively provides network support for energy communication service, further realizes powerline network to information and communication
Technology (Information and Communication Technology, ICT) direction evolution.
And in the prior art, Distribution Network Communication using optical line terminal (Optical Line Terminal, OLT) and
When optical network unit (Optical Network Unit, ONU) carries out trans-regional, across a network data communication, first have to solve
Exactly traditional optical access network bandwidth allocation real-time is poor, there are problems that limitation, in order to realize network bandwidth distribution and
The variation real-time synchronization of flow.
Summary of the invention
The purpose of the application is: solve the problems, such as that optical access network bandwidth allocation real-time is poor, there are limitations, it is real
The real-time synchronization of bandwidth allocation and changes in flow rate is showed.
The technical solution of the application is: providing a kind of power telecom network dynamically bandwidth resource optimization method, the dynamically band
Wide method for optimizing resources is suitable for distribution network communication system, include in distribution network communication system at least one metropolitan area net controller,
At least one access network controller and at least two optical line terminal OLTs, wherein any one optical line terminal be connected with to
Few two optical network unit ONUs, which includes: step 1, according to metropolitan area net controller and access
The resource authorization application of net controller distributes the first bandwidth of optical line terminal and the second bandwidth of optical network unit；Step
2, according to variable polling cycle, the real-time network flow for the optical network unit for including in optical line terminal is detected, and calculate light net
The threshold factor of network unit；Step 3, when the decision threshold factor is equal to 0, according to the first bandwidth, the second bandwidth and real-time network
Flow generates the bandwidth optimization strategy of distribution network communication system, wherein bandwidth optimization strategy includes the terminal of optical line terminal
The unit bandwidth optimization strategy of bandwidth optimization strategy and optical network unit.
In any of the above-described technical solution, further, the calculation formula of polling cycle can be changed are as follows:
In formula, C0To preset polling cycle, i.e., the initial value of variable polling cycle, e is natural constant, PmFor m-th of light
The flowed fluctuation parameter of line terminal, m are the number of optical line terminal.
In any of the above-described technical solution, further, the calculation formula of threshold factor are as follows:
In formula, AmnFor the second bandwidth of n-th of optical network unit in m-th of optical line terminal, BT is that network load is busy
Threshold value, PmnFor the flowed fluctuation parameter of n-th of optical network unit in m-th of optical line terminal, TmnFor m-th of optical line terminal
In n-th of optical network unit real-time network flow, AvmnFor threshold factor.
In any of the above-described technical solution, further, bandwidth optimization strategy is generated, is specifically included:
Step 31, according to the first bandwidth and real-time network flow, the sky that threshold factor is not 0 optical network unit is calculated
Not busy bandwidth and value；
Step 32, according to idle bandwidth and value and the second bandwidth, the second bandwidth optimization value of optical network unit is calculated, and
According to the second bandwidth optimization value, generation unit bandwidth optimization strategy, wherein the calculation formula of the second bandwidth optimization value are as follows:
In formula, AinFor the first bandwidth of i-th of optical line terminal, IinFor n-th of optical-fiber network in i-th of optical line terminal
The calculation formula of the idle bandwidth of unit, idle bandwidth and value are as follows:
In formula, IT is network load Tidle threshold, TinFor in i-th of optical line terminal n-th optical network unit it is real-time
Network flow, PinFor the flowed fluctuation parameter of n-th of optical network unit in i-th of optical line terminal,
BijIt is corresponding for the bandwidth demand amount for j-th of optical network unit that threshold factor in i-th of optical line terminal is 0
Calculation formula are as follows:
In formula, BT is the busy threshold value of network load,
B′ijThe bandwidth demand after the optimization of j-th of optical network unit for being 0 for threshold factor in i-th of optical line terminal
Amount, corresponding calculation formula are as follows:
In any of the above-described technical solution, further, bandwidth optimization strategy is generated, specifically further include: step 33, sentence
Bandwidth demand amount B ' after disconnected optimizationijWhether 0 is greater than, if so, step 34 is executed, if it is not, executing step 1；
Step 34, access network controller sends the increase request of uplink total bandwidth to metropolitan area net controller, wherein uplink is total
It includes the bandwidth demand amount B ' after optimization that bandwidth, which increases request,ij, real-time network flow and flowed fluctuation parameter；
Step 35, increased according to uplink total bandwidth and requested, calculate the uplink idle bandwidth and value of remaining optical line terminal,
Corresponding calculation formula are as follows:
In formula, ImFor the uplink idle bandwidth of m-th of optical line terminal in addition to i-th of optical line terminal, AmFor except
First bandwidth of m-th of optical line terminal except i-th of optical line terminal, TmFor total stream of m-th of access network controller
Amount, IT are network load Tidle threshold, PmFor the flowed fluctuation parameter of the m optical line terminal；
Step 36, according to the first bandwidth of uplink idle bandwidth and value and optical line terminal, the of optical line terminal is calculated
One bandwidth optimization value, and according to the first bandwidth optimal value, generate terminal bandwidth optimisation strategy, wherein the first bandwidth optimal value
Calculation formula are as follows:
In formula, A 'mFor the first bandwidth optimal value, B 'ijFor bandwidth demand amount.
In any of the above-described technical solution, further, dynamically bandwidth resource optimization method, further includes: step 4, when sentencing
Bandwidth demand amount B ' after fixed optimizationijWhen greater than uplink idle bandwidth and value, metropolitan area net controller is sent to access network controller
Unit bandwidth checking request, access network controller calculate coupled optical network unit according to unit bandwidth checking request
Second fairness index, wherein the second fairness index FinCalculation formula are as follows:
Fin=max { A 'in-Ain, 0 }, n=1,2 ..., N, n ≠ j,
In formula, AinFor the second bandwidth of n-th of optical network unit of i-th of optical line terminal, A 'inIt is corresponding second
Bandwidth optimization value；
Step 5, when determining that the second fairness index is greater than 0, according to the second bandwidth optimization value and the second fairness index, meter
It calculates second and restores bandwidth value, and restore bandwidth value according to second and generate the recovery instruction of the second bandwidth, wherein the second bandwidth is restored
The bandwidth for restoring optical network unit is instructed, second restores bandwidth A "mnCalculation formula are as follows:
In formula, AmnFor the second bandwidth of j-th of optical network unit in i-th of optical line terminal, A 'inFor i-th of light
Second bandwidth optimization value of the optical network unit in the terminal of road in addition to j-th of optical network unit, AinFor corresponding second bandwidth,
A′mnFor the second bandwidth optimization value of n-th of optical network unit in m-th of optical line terminal.
In any of the above-described technical solution, before further, in step 5 calculating the second recovery bandwidth value, specifically also wrap
Include: step 51, metropolitan area net controller is according to the first bandwidth optimal value A 'm, calculate optical line terminal in distribution network communication system
First fairness index, wherein the first fairness index FmCalculation formula are as follows:
Fm=max { A 'm-Am, 0 },
In formula, A 'mFor the first bandwidth optimal value of m-th of optical line terminal, AmFor m-th of optical line terminal corresponding
One bandwidth；
Step 52, judge whether the first fairness index is equal to 0, if so, step 53 is executed, if it is not, calculating second restores band
Width values；
Step 53, it according to the first fairness index and the first bandwidth optimal value, calculates first and restores bandwidth, and according to first
Restore bandwidth and generate the recovery instruction of the first bandwidth, wherein the first recovery bandwidth instructs the band for restoring optical line terminal
Width, first restores bandwidth A "mCalculation formula are as follows:
In formula, A 'iFor the first bandwidth optimal value of i-th of optical line terminal, ImFor in addition to i-th of optical line terminal
The uplink idle bandwidth of m-th of optical line terminal.
The beneficial effect of the application is: by according to the real-time network that can be changed each optical network unit of poll cycle detection
Flow, and using corresponding threshold factor as foundation, bandwidth optimization strategy is generated, solves optical access network bandwidth allocation real-time
There is limitation in difference, realize the real-time synchronization of bandwidth allocation and changes in flow rate.Pass through generation unit bandwidth respectively
Optimisation strategy and terminal bandwidth optimisation strategy, the band width configuration of dynamic optimization optical network unit and optical line terminal connect for light
The huge bandwidth resources that network efficiently utilize problem, and the on-demand real-time optimization of Internet resources is realized under environment of passive optical network
Function, real-time collecting network state, look-ahead network busy hot spot improve end-user experience.
In this application, by calculating the first fairness index and the second fairness index, the public affairs after introducing bandwidth resource allocation
Levelling Restoration Mechanism guarantees the fairness of optical network unit and optical line terminal bandwidth allocation, compared to dependence historical statistics at present
Trans-regional bandwidth resources utilization rate is greatly improved in the artificial network management system of information.
Detailed description of the invention
The advantages of above-mentioned and/or additional aspect of the application, will become in combining description of the following accompanying drawings to embodiment
Obviously and it is readily appreciated that, in which:
Fig. 1 is the signal stream according to the power telecom network dynamically bandwidth resource optimization method of one embodiment of the application
Cheng Tu.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to be more clearly understood that the above objects, features, and advantages of the application
Mode is applied the application is further described in detail.It should be noted that in the absence of conflict, the reality of the application
Applying the feature in example and embodiment can be combined with each other.
In the following description, many details are elaborated in order to fully understand the application, still, the application is also
It can be implemented using other than the one described here other modes, therefore, the protection scope of the application is not by following public affairs
The limitation for the specific embodiment opened.
As shown in Figure 1, present embodiments provide a kind of power telecom network dynamically bandwidth resource optimization method, the dynamically band
Wide method for optimizing resources is suitable for distribution network communication system, include in distribution network communication system at least one metropolitan area net controller,
At least one access network controller and at least two optical line terminal OLTs, wherein any one optical line terminal be connected with to
Few two optical network unit ONUs, the dynamically bandwidth resource optimization method include:
Step 1, according to the resource authorization application of metropolitan area net controller and access network controller, optical line terminal is distributed
Second bandwidth of the first bandwidth and optical network unit；
Specifically, to the resource authorization application initialization OLT's and ONU in metropolitan area net controller and access network controller
Band width configuration generates the first bandwidth and the second bandwidth.Resource authorization in power communication is applied according to service-level agreement
(Service-Level Agreement, SLA) generates authorized bandwidth and initial bandwidth (the first bandwidth and second of each terminal
Bandwidth), usually carry out bandwidth allocation according to certain coincidence, authorized bandwidth is to promise to undertake to the bandwidth value of user, and initial bandwidth
It is then to be converted according to certain coincidence, since the consumer of access net flow is people, with the network flows such as data center
Amount is most of to consume difference by machine, and it is transregional to certainly exist network load when carrying out trans-regional data communication for power telecom network
The lack of uniformity in domain.
Step 2, according to variable polling cycle, the real-time network stream for the optical network unit for including in optical line terminal is detected
Amount, and calculate the threshold factor of optical network unit；
Further, it can be changed the calculation formula of polling cycle are as follows:
In formula, C0To preset polling cycle, i.e., the initial value of variable polling cycle, e is natural constant, PmFor m-th of light
The flowed fluctuation parameter of line terminal, m are the number of optical line terminal.
Specifically, after obtaining the first bandwidth and the second bandwidth, access network controller is according to variable polling cycle CmPoll
Optical line terminal OLT1To LOTM, can be changed polling cycle CmValue by flowed fluctuation parameter PmIt determines, flowed fluctuation parameter Pm's
Square value is bigger, can be changed polling cycle CmValue it is smaller, to optical line terminal LOTmPolling interval it is shorter, more accurately
The queuing message for grasping the biggish OLT of data fluctuations, network flow that the accuracy and controller for improving prediction are collected and true
The synchronism of real flow.
Further, the calculation formula of threshold factor are as follows:
In formula, AmnFor the second bandwidth of n-th of optical network unit in m-th of optical line terminal, BT is that network load is busy
Threshold value, PmnFor the flowed fluctuation parameter of n-th of optical network unit in m-th of optical line terminal, TmnFor m-th of optical line terminal
In n-th of optical network unit real-time network flow, AvmnFor threshold factor.
Specifically, threshold factor Av is definedmn, in order to which the network load condition to optical network unit is monitored, work as light
When the threshold factor of network unit is more than certain threshold value, show that corresponding optical network unit needs are adjusted, to be adapted to
Current network data communication.
Step 3, it when the decision threshold factor is equal to 0, according to the first bandwidth, the second bandwidth and real-time network flow, generates
The bandwidth optimization strategy of distribution network communication system, wherein bandwidth optimization strategy includes the terminal bandwidth optimization plan of optical line terminal
Omit the unit bandwidth optimization strategy with optical network unit.
Further, bandwidth optimization strategy is generated, is specifically included:
Step 31, according to the first bandwidth and real-time network flow, the sky that threshold factor is not 0 optical network unit is calculated
Not busy bandwidth and value；
Specifically, the calculation formula of idle bandwidth and value is set are as follows:
In formula, IT is network load Tidle threshold, TinFor in i-th of optical line terminal n-th optical network unit it is real-time
Network flow, PinFor the flowed fluctuation parameter of n-th of optical network unit in i-th of optical line terminal, AinFor i-th of optical link
First bandwidth of terminal.
Step 32, according to idle bandwidth and value and the second bandwidth, the second bandwidth optimization value of optical network unit is calculated, and
According to the second bandwidth optimization value, generation unit bandwidth optimization strategy, wherein the calculation formula of the second bandwidth optimization value are as follows:
In formula, AinFor the first bandwidth of i-th of optical line terminal, IinFor n-th of optical-fiber network in i-th of optical line terminal
The idle bandwidth of unit, BijFor the bandwidth demand for j-th of optical network unit that threshold factor in i-th of optical line terminal is 0
Amount, B 'ijThe bandwidth demand amount after the optimization of j-th of optical network unit for being 0 for threshold factor in i-th of optical line terminal.
Specifically, the bandwidth demand amount B of j-th of optical network unit in i-th of optical line terminal is setijCorresponding calculating
Formula are as follows:
In formula, BT is the busy threshold value of network load, TijFor the real-time network flow of corresponding network unit, AijFor corresponding net
The real-time network flow of network unit, wherein bandwidth demand amount B 'ijCorresponding calculation formula are as follows:
In formula, ∑ IinFor idle bandwidth and value,
In conclusion the corresponding second bandwidth optimization value A ' of unit bandwidth optimization strategy can be calculatedinWith it is right after optimization
The bandwidth demand amount B ' answeredij, in order to which access network controller is according to the second obtained bandwidth optimization value A 'inTo connected to it
Optical network unit carries out band width configuration, generation unit bandwidth optimization strategy, wherein bandwidth demand amount B 'ijIt is current ONUijStill
It needs to adjust increased bandwidth, is the trigger condition of optical line terminal bandwidth optimization, as judgement bandwidth demand amount B 'ijGreater than 0
When, it needs to optimize optical line terminal, in order to generate terminal optimized strategy.
Further, it is specific to generate bandwidth optimization strategy further include:
Step 33, the bandwidth demand amount B ' after judging optimizationijWhether 0 is greater than, if so, step 34 is executed, if it is not, executing
Step 1；
Step 34, access network controller sends the increase request of uplink total bandwidth to metropolitan area net controller, wherein uplink is total
It includes the bandwidth demand amount B ' after changing that bandwidth, which increases request,ij, real-time network flow and flowed fluctuation parameter；
Step 35, increased according to uplink total bandwidth and requested, calculate the uplink idle bandwidth and value of remaining optical line terminal,
Corresponding calculation formula are as follows:
In formula, ImFor the uplink idle bandwidth of m-th of optical line terminal in addition to i-th of optical line terminal, AmFor except
First bandwidth of m-th of optical line terminal except i-th of optical line terminal, TmFor total stream of m-th of access network controller
Amount, IT are network load Tidle threshold, PmFor the flowed fluctuation parameter of the m optical line terminal；
Specifically, after metropolitan area net controller receives bandwidth request, the upper of each idle optical line terminal OLT is directly calculated
Row idle bandwidth Im, uplink idle bandwidth I is calculated heremMode and optical line terminal OLT inside to optical network unit carry out
The strategy of optimization is different, and the distribution of optical line terminal OLT upstream bandwidth is actively distributed by metropolitan area net controller, is not automatic suitable
Uplink traffic variation optimization band width configuration is answered, but actively triggers scheduling bandwidth resource by access network controller, therefore, is not had
There is the process of poll, this is also what metropolitan area network feature determined.
The total flow T of access network controllermWith the flowed fluctuation parameter P of optical line terminalmIt is all that metropolitan area net controller is logical
It crosses to interact with access network controller and get, the collection of network traffic information is by access network controller according to certain period
Poll realizes that metropolitan area net controller is only responsible for the bandwidth resources between scheduling OLT.The core concept of global bandwidth optimisation strategy
It is the lack of uniformity using network flow, the network bandwidth of free area is transferred to high load by trans-regional scheduling bandwidth resource
Region, the distribution for realizing bandwidth is synchronous with the distribution of flow, maximally utilizes the whole network bandwidth resources.
Step 36, according to the first bandwidth of uplink idle bandwidth and value and optical line terminal, the of optical line terminal is calculated
One bandwidth optimization value, and according to the first bandwidth optimal value, generate terminal bandwidth optimisation strategy, wherein the first bandwidth optimal value
Calculation formula are as follows:
In formula, A 'mFor the first bandwidth optimal value, B 'ijFor bandwidth demand amount.
Specifically, metropolitan area net controller is according to uplink idle bandwidth ImSize be ranked up, priority scheduling network load
Lower OLT, it is different that scheduling strategy here and OLT internal bandwidth optimisation strategy dispatch the available free ONU of institute in proportion, because
The overall network load of the same area is not in very big fluctuation, and the fluctuation of load of ONU terminal is more frequent, if
The load in some region is minimum, illustrates that its network is all more idle in following a period of time, is suitble to according to intensity of load by suitable
Sequence executes scheduling strategy, until meeting bandwidth demand.
Metropolitan area net controller is according to calculated first bandwidth optimal value A 'mAfter generating terminal bandwidth optimisation strategy, carry out
Band width configuration, redistributes the uplink total bandwidth of optical line terminal, and is sent to access network controller, and access network controller increases
Add OLTiAnd ONUijBandwidth allocation, complete according to the current optimization for implementing network flow to bandwidth resources.
Emphasis under network high load condition is no longer network utilization, but Internet resources distributional equity, from
OLT internal bandwidth optimisation strategy and the logic of overall situation OLT bandwidth optimization strategy, which can be seen that, belongs to the actively property fought for resource point
With mode, i.e., first first, high load terminal occupies the mode of low-load terminal bandwidth, there are malapportioned possibility, than
As terminal A for a period of time in network flow it is lower, bandwidth allocation has been transferred to high load area, but a certain moment opens
Always end A flow goes up, but available bandwidth is not enough, and network overall load is very high at this time, bandwidth optimization strategy without
Method shifts enough idle bandwidths to meet the needs of terminal A, it is clear that and bandwidth can be used to be far below its authorized bandwidth for terminal A, this
And optical access network resource management cannot receive, in order to guarantee the fairness of bandwidth allocation, it is extensive that this paper proposes bandwidth
Multiple strategy, including global bandwidth recovery policy and OLT internal bandwidth recovery policy guarantee under network entirety high load condition eventually
End can at least be assigned to the bandwidth not less than initial value.
Further, dynamically bandwidth resource optimization method, further includes: step 4, bandwidth demand amount after determining optimization
B′ijWhen greater than uplink idle bandwidth and value, metropolitan area net controller connects to access network controller transmission unit bandwidth checking request
Network controller calculates the second fairness index of coupled optical network unit according to unit bandwidth checking request, wherein
Second fairness index FinCalculation formula are as follows:
Fin=max { A 'in-Ain, 0 }, n=1,2 ..., N, n ≠ j,
In formula, AinFor the second bandwidth of n-th of optical network unit of i-th of optical line terminal, A 'inIt is corresponding second
Bandwidth optimization value；
Specifically, after access network controller receives bandwidth optimization strategy, the bandwidth of optical network unit is carried out excellent
Change, sets the fairness index of optical network unit, be denoted as the second fairness index, in order to other ONU under the same OLT
It is then forced to reduce amount of bandwidth allocation by a certain percentage according to fairness index.
Step 5, when determining that the second fairness index is greater than 0, according to the second bandwidth optimization value and the second fairness index, meter
It calculates second and restores bandwidth value, and restore bandwidth value according to second and generate the recovery instruction of the second bandwidth, wherein the second bandwidth is restored
The bandwidth for restoring optical network unit is instructed, second restores bandwidth A "mnCalculation formula are as follows:
In formula, AmnFor the second bandwidth of j-th of optical network unit in i-th of optical line terminal, A 'inFor i-th of light
Second bandwidth optimization value of the optical network unit in the terminal of road in addition to j-th of optical network unit, AinFor corresponding second bandwidth,
A′mnFor the second bandwidth optimization value of n-th of optical network unit in m-th of optical line terminal.
Specifically, optical line terminal is according to the bandwidth optimization strategy received, the bandwidth of the optical network unit responsible to its
It optimizes, when determining that corresponding second fairness index of any one optical network unit is greater than 0, shows that the optical network unit accounts for
With biggish bandwidth, at this point, optical line terminal is according to the second bandwidth A "mnCalculation formula, calculate it is corresponding second restore
Bandwidth A "mn, the bandwidth of optical network unit is restored, according to the second fairness index, forces to reduce bandwidth point by a certain percentage
Dosage, to solve the fairness problem of the whole bandwidth allocation in high load situations of network.
Preferably, before the second recovery bandwidth value is calculated in step 5, specifically further include:
Step 51, metropolitan area net controller is according to the first bandwidth optimal value A 'm, calculate optical link in distribution network communication system
First fairness index of terminal, wherein the first fairness index FmCalculation formula are as follows:
Fm=max { A 'm-Am, 0 },
In formula, A 'mFor the first bandwidth optimal value of m-th of optical line terminal, AmFor m-th of optical line terminal corresponding
One bandwidth；
Step 52, judge whether the first fairness index is equal to 0, if so, step 53 is executed, if it is not, calculating second restores band
Width values；
Step 53, it according to the first fairness index and the first bandwidth optimal value, calculates first and restores bandwidth, and according to first
Restore bandwidth and generate the recovery instruction of the first bandwidth, wherein the first recovery bandwidth instructs the band for restoring optical line terminal
Width, first restores bandwidth A "mCalculation formula are as follows:
In formula, A 'iFor the first bandwidth optimal value of i-th of optical line terminal, ImFor in addition to i-th of optical line terminal
The uplink idle bandwidth of m-th of optical line terminal.
Specifically, before then carrying out bandwidth recovery to optical network unit, in order to reduce the interaction of control signaling, and guarantee
Some region of network load fluctuation is more consistent, sets the first fairness index F of optical line terminalm, first to optical line terminal
Uplink total bandwidth restored.As the first fairness index FmWhen equal to 0, show the uplink that corresponding optical line terminal occupies
Total bandwidth is less than initial apportioning cost (the first bandwidth), therefore, it is necessary to restore to the optical line terminal, to guarantee the light
Restore first to original allocation value line terminal.
Metropolitan Area Network (MAN) controls first by m according to fairness index FmIt sorts from large to small, preferential reduction distribution is most inequitable
The uplink total bandwidth of OLT, secondly, restoring bandwidth A " according to firstmCalculation formula, calculate it is corresponding first restore bandwidth
A″m, finally, metropolitan area net controller restores bandwidth A " according to firstmIt generates the first bandwidth and restores instruction, be handed down to access network control system
Device reconfigures the uplink total bandwidth of optical line terminal, in order to which optical link block is according to the total band of updated uplink
Width and still unsatisfied demand bandwidth B " 'ijBand width configuration is carried out to optical network unit, to reduce the interaction of control signaling, and
Guarantee that some region of network load fluctuation is more consistent.
The technical solution for having been described in detail above with reference to the accompanying drawings the application, it is dynamic that present applicant proposes a kind of power telecom networks
State bandwidth resources optimization method is suitable for distribution network communication system, this method comprises: step 1, according to metropolitan area net controller and
The resource authorization application of access network controller distributes the first bandwidth of optical line terminal and the second bandwidth of optical network unit；Step
Rapid 2, according to variable polling cycle, the real-time network flow for the optical network unit for including in optical line terminal is detected, and calculate light
The threshold factor of network unit；Step 3, when the decision threshold factor be equal to 0 when, according to the first bandwidth, the second bandwidth and in real time
Network flow generates the bandwidth optimization strategy of distribution network communication system, wherein bandwidth optimization strategy includes optical line terminal
The unit bandwidth optimization strategy of terminal bandwidth optimisation strategy and optical network unit.By the technical solution in the application, solve
Optical access network bandwidth allocation real-time is poor, there are problems that limitation, realizes the real-time same of bandwidth allocation and changes in flow rate
Step.
Step in the application can be sequentially adjusted, combined, and deleted according to actual needs.
Unit in the application device can be combined, divided and deleted according to actual needs.
Although disclosing the application in detail with reference to attached drawing, it will be appreciated that, these descriptions are only exemplary, and
The non-application for being used to limit the application.The protection scope of the application may include not departing from this by appended claims
Apply being directed in the case where protection scope and spirit and invents made various modifications, remodeling and equivalent scheme.
Claims (7)
1. a kind of power telecom network dynamically bandwidth resource optimization method, which is characterized in that the dynamically bandwidth resource optimization method
It include at least one metropolitan area net controller in the distribution network communication system, at least one connects suitable for distribution network communication system
Network controller and at least two optical line terminal OLTs, wherein any one described optical line terminal is connected at least two light
Network unit ONU, the dynamically bandwidth resource optimization method include:
Step 1, according to the resource authorization application of the metropolitan area net controller and the access network controller, the optical link is distributed
First bandwidth of terminal and the second bandwidth of the optical network unit；
Step 2, according to variable polling cycle, the real-time network for the optical network unit for including in the optical line terminal is detected
Flow, and calculate the threshold factor of the optical network unit；
Step 3, when determining that the threshold factor is equal to 0, according to first bandwidth, second bandwidth and the Real-time Network
Network flow generates the bandwidth optimization strategy of the distribution network communication system, wherein the bandwidth optimization strategy includes described
The terminal bandwidth optimisation strategy of optical line terminal and the unit bandwidth optimization strategy of the optical network unit.
2. power telecom network dynamically bandwidth resource optimization method as described in claim 1, which is characterized in that the variable poll
The calculation formula in period are as follows:
In formula, C0To preset polling cycle, i.e., the initial value of variable polling cycle, e is natural constant, PmIt is whole for m-th of optical link
The flowed fluctuation parameter at end, m are the number of the optical line terminal.
3. power telecom network dynamically bandwidth resource optimization method as described in claim 1, which is characterized in that the threshold factor
Calculation formula are as follows:
In formula, AmnFor second bandwidth of n-th of optical network unit in m-th of optical line terminal, BT is that network load is busy
Threshold value, PmnFor the flowed fluctuation parameter of n-th of optical network unit described in m-th of optical line terminal, TmnFor the m
The real-time network flow of n-th of optical network unit, Av described in a optical line terminalmnFor the threshold factor.
4. power telecom network dynamically bandwidth resource optimization method as described in claim 1, which is characterized in that generate described
Bandwidth optimization strategy, specifically includes:
Step 31, according to first bandwidth and the real-time network flow, the light net that calculate the threshold factor not be 0
The idle bandwidth and value of network unit；
Step 32, excellent according to the idle bandwidth and value and second bandwidth, the second bandwidth for calculating the optical network unit
Change value, and according to the second bandwidth optimization value, generate the unit bandwidth optimization strategy, wherein second bandwidth optimization
The calculation formula of value are as follows:
In formula, AinFor the first bandwidth of i-th of optical line terminal, IinFor n-th optical network unit in i-th of optical line terminal
Idle bandwidth, BijFor the bandwidth demand amount for j-th of optical network unit that threshold factor described in i-th of optical line terminal is 0,
B′ijBandwidth demand amount after optimizing for j-th of optical network unit that threshold factor described in i-th of optical line terminal is 0.
5. power telecom network dynamically bandwidth resource optimization method as claimed in claim 4, which is characterized in that generate the bandwidth
Optimisation strategy, specifically further include:
Step 33, the bandwidth demand amount B ' after judging optimizationijWhether 0 is greater than, if so, step 34 is executed, if it is not, executing step 1；
Step 34, the access network controller sends the increase request of uplink total bandwidth to the metropolitan area net controller, wherein described
It includes the bandwidth demand amount B ' after the optimization that uplink total bandwidth, which increases request,ij, the real-time network flow and the flow
Fluctuation parameters；
Step 35, according to the uplink total bandwidth increase request, calculate remaining optical line terminal uplink idle bandwidth and
Value, corresponding calculation formula are as follows:
In formula, ImFor the uplink idle bandwidth of m-th of optical line terminal in addition to i-th of optical line terminal, AmFor except i-th
First bandwidth of m-th of optical line terminal except optical line terminal, TmFor the total flow of m-th of access network controller, IT is
Network load Tidle threshold, PmFor the flowed fluctuation parameter of m-th of optical line terminal；
Step 36, according to first bandwidth of the uplink idle bandwidth and value and the optical line terminal, the light is calculated
First bandwidth optimal value of line terminal, and according to the first bandwidth optimal value, the terminal bandwidth optimisation strategy is generated,
In, the calculation formula of the first bandwidth optimal value are as follows:
In formula, A 'mFor the first bandwidth optimal value, B 'ijFor the bandwidth demand amount.
6. power telecom network dynamically bandwidth resource optimization method as claimed in claim 5, which is characterized in that the dynamic bandwidth
Method for optimizing resources, further includes:
Step 4, the bandwidth demand amount B ' after determining the optimizationijWhen greater than the uplink idle bandwidth and value, the metropolitan area
Net controller is to the access network controller transmission unit bandwidth checking request, and the access network controller is according to the unit band
Wide checking request calculates the second fairness index of the coupled optical network unit, wherein the second fairness index Fin
Calculation formula are as follows:
Fin=max { A 'in-Ain, 0 }, n=1,2 ..., N, n ≠ j,
In formula, AinFor the second bandwidth of n-th of optical network unit of i-th of optical line terminal, A 'inIt is excellent for corresponding second bandwidth
Change value；
Step 5, when determining that second fairness index is greater than 0, according to the second bandwidth optimization value and second justice
The factor calculates second and restores bandwidth value, and restores bandwidth value according to described second and generate the recovery instruction of the second bandwidth, wherein institute
It states the second bandwidth and instructs bandwidth for restoring the optical network unit, described second restores bandwidth A "mnCalculation formula
Are as follows:
In formula, AmnFor the second bandwidth of j-th of optical network unit in i-th of optical line terminal, A 'inFor i-th of optical line terminal
In optical network unit in addition to j-th of optical network unit the second bandwidth optimization value, AinFor corresponding second bandwidth, A 'mnIt is
Second bandwidth optimization value of n-th of optical network unit in m optical line terminal.
7. power telecom network dynamically bandwidth resource optimization method as claimed in claim 6, which is characterized in that calculated in step 5
Before described second restores bandwidth value, specifically further include:
Step 51, the metropolitan area net controller is according to the first bandwidth optimal value A 'm, calculate in the distribution network communication system
First fairness index of the optical line terminal, wherein the first fairness index FmCalculation formula are as follows:
Fm=max { A 'm-Am, 0 },
In formula, A 'mFor the first bandwidth optimal value of m-th of optical line terminal, AmIt is corresponding for m-th of optical line terminal
The first bandwidth；
Step 52, judge whether first fairness index is equal to 0, if so, step 53 is executed, if it is not, it is extensive to calculate described second
Multiple bandwidth value；
Step 53, it according to first fairness index and the first bandwidth optimal value, calculates first and restores bandwidth, and according to institute
It states the first recovery bandwidth the first bandwidth of generation and restores instruction, wherein the first recovery bandwidth is restored to instruct for restoring described
The bandwidth of optical line terminal, described first restores bandwidth A "mCalculation formula are as follows:
In formula, A 'iFor the first bandwidth optimal value of i-th of optical line terminal, ImFor in addition to i-th of optical line terminal
The uplink idle bandwidth of m-th of optical line terminal.
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