CN106254277A - A kind of EPON DBA algorithm being applicable to IEC 61850 - Google Patents

Abstract

The invention discloses a kind of EPON DBA algorithm being applicable to IEC 61850, during the network message of IEC 61850 transmits, using the method that fixing polling cycle and dynamic bandwidth allocation combine, wherein, the network message of described IEC 61850 includes SMV, GOOSE, MMS tri-class；The sample rate of SMV message is required consistent with IEC61850 by fixing polling cycle.By the method using fixing polling cycle and dynamic bandwidth allocation to combine, both can ensure that SMV transmission reliable, stable in IEC 61850, can guarantee that again the efficient transmission of the relative real-time of GOOSE message and MMS message, be a kind of be applicable to network message based on IEC 61850 agreement EPON network reasonable occupied bandwidth, the algorithm that can transmit in order.

Description

A kind of EPON DBA algorithm being applicable to IEC 61850

Technical field

The present invention relates to the applied technical field of EPON, be specifically related to a kind of EPON being applicable to IEC 61850 (Ethernet Passive Optical Network, ethernet passive optical network) DBA (Dynamic Bandwidth Allocation, Dynamic Bandwidth Allocation) algorithm.

Background technology

By the development of more than ten years, IEC 61850 has had become as digital transformer substation and intelligent grid data communication Foundation stone.IEC 61850-9-2 definition is mapped to the networking mode of ISO/IEC 8802-3, control according to electric network protection, The application such as failure wave-recording has the requirement of real-time, stability to IEC 61850 transmission.

EPON is a kind of novel intelligent acess network technology, uses point-to-multipoint structure, and passive fiber transmits, Ke Yi Multiple business is provided on Ethernet.When being applied to telecommunication system, EPON upstream bandwidth is time division multiplex, the upstream bandwidth of ONU Unification is carried out dynamic bandwidth allocation algorithm decision by OLT.Generally all there is network transmission delay instability, network delay shake greatly Shortcoming, two continuous frames dispersion deviation SMV message within ± 5S, through EPON communication system (ONU, beam splitter, OLT) After, the largest interval arriving receiving terminal is 1424S, and minimum interval is 28S, and randomness is the highest.

Therefore, traditional E PON bandwidth allocation algorithm, it is unsatisfactory for being applied to IEC 61850 transmission and there is real-time, stability Requirement.How by bandwidth allocation algorithm flexible, rational, the bandwidth resources of EPON are carried out reasonable distribution, to ensure SMV, GOOSE and MMS cooperative transmission, be EPON technology can be applied to IEC61850 communication important subject.

Summary of the invention

The invention provides a kind of EPON DBA algorithm being applicable to IEC 61850, be used for solving message in EPON system Transmit stability and bandwidth allocation problems.

In order to solve above-mentioned technical problem, the embodiment of the invention discloses following technical scheme:

A kind of EPON DBA algorithm being applicable to IEC 61850, during the network message of IEC 61850 transmits, adopts The method combined with fixing polling cycle and dynamic bandwidth allocation, wherein, the network message of described IEC 61850 include SMV, GOOSE, MMS tri-class；The sample rate of SMV message is required consistent with IEC61850 by fixing polling cycle.

Preferably, above-mentioned be applicable to the EPON DBA algorithm of IEC 61850, it is divided into two classes to award respectively EPON bandwidth Power, first kind bandwidth is for authorizing the SMV message transmission of IEC 61850, and Equations of The Second Kind bandwidth is for authorizing IEC's 61850 GOOSE and MMS message transmission；During distribution EPON, divide in the order of described Equations of The Second Kind bandwidth according to described first kind band preference Join, in Equations of The Second Kind bandwidth is distributed, it is judged that GOOSE and MMS message transmits whether there is conflict, if it is present preferentially distribute Bandwidth is to GOOSE message.

Preferably, above-mentioned be applicable to the EPON DBA algorithm of IEC 61850, the GATE issuing mechanism of EPON bandwidth For: in each described fixing polling cycle, OLT issues twice GATE to each ONU and authorizes, and issues rear ONU every time and obtains Authorized window, it is SMV message bandwidth authorizing that the GATE issued for the first time authorizes, and the GATE that second time issues authorizes and reports for GOOSE Literary composition and MMS message bandwidth authorizing.

Preferably, above-mentioned be applicable to the EPON DBA algorithm of IEC 61850, the network message of IEC 61850 upper Biography mechanism is: during ONU bandwidth application, by the separately application of the priority level of network message, in described authorized window, first uploads SMV message, and after SMV message, and then upload a REPORT message, next uploads GOOSE and MMS message transmission, and And then the 2nd REPORT message is uploaded after GOOSE and MMS message.

Preferably, above-mentioned be applicable to the EPON DBA algorithm of IEC 61850, receive, at OLT, the institute that all ONU upload After having REPORT, the first bandwidth application to SMV message is preferentially allocated, in the bandwidth application of remaining all ONU, low The first bandwidth application to all of GOOSE message is allocated, and the finally bandwidth application to MMS message is allocated.,

Preferably, above-mentioned be applicable to the EPON DBA algorithm of IEC 61850, described fixing polling cycle is divided into Two sections: SMV uploads part T_upPart T is uploaded with GOOSE, MMS_down, T_dba=T_up+T_down, each polling cycle sets when initializing FixedAt T_upIn time period, when OLT receives the REPORT message that ONU uploads, immediately to SMV message therein Bandwidth application authorizes, and issues one and authorize GATE to ONU, and updates the T in polling cycle_upValue；At T_upWindow At the end of, OLT starts to add up GOOSE, MMS bandwidth application that all ONU upload, the GOOSE applied for all ONU the most successively The bandwidth application of message carries out bandwidth distribution, and the bandwidth application to the MMS message of the application of all ONU carries the most successively Wide distribution, and by GOOSE message with ask that MMS bandwidth authorizing is merged in a mandate GATE in vain and be handed down to corresponding ONU.

Preferably, above-mentioned be applicable to the EPON DBA algorithm of IEC 61850, described receive all ONU at OLT and upload All REPORT after, the first bandwidth application to SMV message is preferentially allocated, in the bandwidth application of remaining all ONU In, low first bandwidth application to all of GOOSE message is allocated, and the finally bandwidth application to MMS message is allocated tool Body includes:

After OLT receives all REPORT that all ONU upload, the first bandwidth application to SMV message is preferentially carried out point Join, mandate bandwidth G of described SMV message_sv,iSize be,

G_sv,i=min (R_sv,i,BW_svmax,BW1_remain)

Wherein, R_sv,iThe bandwidth of SVM message, B for the actual application of ONU_{Wsv_max}For can be ONU SVM application can be divided The maximum restriction bandwidth joined, BW1_remainFor current available bandwidth.

Preferably, above-mentioned be applicable to the EPON DBA algorithm of IEC 61850, receive, at OLT, the institute that all ONU upload After having REPORT, the first bandwidth application to SMV message is preferentially allocated, in the bandwidth application of remaining all ONU, low The first bandwidth application to all of GOOSE message is allocated, and the finally bandwidth application to MMS message is allocated specifically wrapping Include:

Mandate bandwidth G of described GOOSE message_goose,iSize be,

G_goose,i=min (R_goose,i,BW2_remain)

Wherein, BW2_remain=BW1_remain-G_{Svm, i}, BW2_remainCurrently may be used for remaining after distributing all of SVM message Use bandwidth.

Preferably, above-mentioned be applicable to the EPON DBA algorithm of IEC 61850, described receive all ONU at OLT and upload All REPORT after, the first bandwidth application to SMV message is preferentially allocated, in the bandwidth application of remaining all ONU In, low first bandwidth application to all of GOOSE message is allocated, and the finally bandwidth application to MMS message is allocated tool Body includes:

If R_sum≤BW3_remain, mandate bandwidth G of described MMS message_mms,iSize be,

$G_{mms,i}=R_{mms,i}+BW{3}_{remain}\×\frac{R_{mms,i}}{R_{sum}};$

If R_sum＞ BW3_remain, mandate bandwidth G of described MMS message_mms,iSize be,

$G_{mms,i}={\mathrm{BW}}_{3remain}\×\frac{R_{mms,i}}{R_{sum}};$

Wherein, R_sumBandwidth application R for the MMS message to be allocated of all ONU_mms,iSummation, BW3_remainFor for dividing Join remaining current available bandwidth after all of SVM message and GOOSE message.

From above technical scheme, the EPON DBA algorithm being applicable to IEC 61850 that the present invention provides, by using The method that fixing polling cycle and dynamic bandwidth allocation combine, both can ensure that SMV transmission reliable, stable in IEC 61850, again Can guarantee that the relative real-time of GOOSE message and the efficient transmission of MMS message, be a kind of being applicable to based on IEC61850 agreement Network message is reasonable occupied bandwidth, the algorithm that can transmit in order in EPON network.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, for those of ordinary skill in the art Speech, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the principle schematic of the EPON DBA algorithm being applicable to IEC 61850 that the embodiment of the present invention provides；

Fig. 2 is Dynamic Bandwidth Allocation stream the EPON DBA algorithm be applicable to IEC 61850 that the embodiment of the present invention provides Cheng Tu.

Detailed description of the invention

For the technical scheme making those skilled in the art be more fully understood that in the present invention, real below in conjunction with the present invention Execute the accompanying drawing in example, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described enforcement Example is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, this area is common The every other embodiment that technical staff is obtained under not making creative work premise, all should belong to present invention protection Scope.

The invention provides a kind of EPON DBA algorithm being applicable to IEC 61850, the network message at IEC 61850 passes During sending, use the method that fixing polling cycle and dynamic bandwidth allocation combine, wherein, the network of described IEC 61850 Message includes SMV, GOOSE, MMS tri-class；The sample rate of SMV message is required consistent, i.e. with IEC61850 by fixing polling cycle 4000 times per second, the most each polling cycle is fixed as 250 microseconds.This is because the terminal that each ONU accesses gathers content Difference, though on send be SMV message, length is the most different；On the other hand, transmission GOOSE message displacement time need close Collection sampling and in real time on gives, under resting state (non-Bitwise) on the frequency sent the most relatively low, therefore GOOSE message pair The bandwidth requirement answered changes greatly；For MMS message, being then random burst, message length is relatively big, but without requirement of real-time. Under the fixing polling cycle of 250 microseconds, will meet above-mentioned three kinds of messages to real-time and the requirement of bandwidth, the present invention adopts simultaneously The method combined with fixing polling cycle and Dynamic Bandwidth Allocation, solves SMV, GOOSE and MMS report in IEC61850 agreement Literary composition is for communication rapidity, the coordination problem of reliability；Guaranteeing that 4000 per second of SMV message transmits at equal intervals, GOOSE message is opened Whether pass amount conjugates dynamically to be spaced transmitting, guarantees the efficiency of transmission of MMS message simultaneously.

On the basis of technique scheme, concrete way refers to: be divided into two classes to authorize respectively EPON bandwidth, first Class bandwidth is for authorizing the SMV message transmission of IEC 61850, and Equations of The Second Kind bandwidth is for authorizing GOOSE and MMS of IEC 61850 Message transmission；During distribution EPON, according to described first kind band preference in the order-assigned of described Equations of The Second Kind bandwidth, at Equations of The Second Kind In bandwidth distribution, it is judged that GOOSE and MMS message transmits whether there is conflict, if it is present preferentially distribution bandwidth is to GOOSE Message.Using above-mentioned classification grading authorized, it is ensured that in each polling cycle, all ONU all can obtain window mandate.Ensure Real-time that each SMV uploads and reliability.The mandate of GOOSE and MMS is unified, decreases mandate expense, it is to avoid under crossing frequently Send out GATE message and cause taking too much downlink bandwidth resource, improve communication efficiency, in Equations of The Second Kind mandate, when GOOSE and MMS carries During wide application conflict, band preference is distributed to GOOSE message, is present to ensure that the GOOSE message requirement to real-time.

On the basis of technique scheme, the GATE issuing mechanism of EPON bandwidth is: in each described fixing poll week In phase, OLT issues twice GATE to each ONU and authorizes, and issues rear ONU every time and obtains authorized window, issues for the first time It is SMV message bandwidth authorizing that GATE authorizes, and the GATE that second time issues authorizes as GOOSE message and MMS message bandwidth authorizing.As Shown in Fig. 1, it is known that OLT needs to coordinate between two ONU, and how the network message of the various IEC61850 of meeting communication protocols takies The bandwidth of same EPON.Such as figure, the process of regulation is: in each polling cycle, and OLT issues twice to each ONU GATE authorizes, and such as G1, G2, G'1, G'2, wherein G1, G'1 issue for ONU1, and G2, G'2 issue for ONU2；? For time angle, G1, G2 are first time priority bandwidth entitlement message in the n-th dba cycle, the N+1 dba of G'1, G'2 First time priority bandwidth entitlement message in cycle.The GATE that second time issues authorizes and includes GOOSE message bandwidth authorizing and MMS The bandwidth authorizing of message, such as Gs 1, Gs2, Gs'1, Gs'2, wherein Gs1, Gs'1 are the bandwidth authorizing messages being handed down to ONU1, Gs2, Gs'2 are the bandwidth authorizing messages being handed down to ONU2.The upload mechanism of the network message of IEC 61850 is: ONU applies for band Time wide, by the separately application of the priority level of network message, in described authorized window, first upload SMV message, and report at SMV And then uploading a REPORT message after literary composition, next uploads GOOSE and MMS message transmission, and at GOOSE and MMS message The most and then the 2nd REPORT message is uploaded.Illustrating further in conjunction with Fig. 1, ONU1, in G1 authorized window, first uploads SMV report And then literary composition, if the SV1-2 in Fig. 1 is high priority message, and upload a REPORT message after SMV message, and OLT receives During the REPORT uploaded to ONU1, first SMV bandwidth application is allocated immediately, and issues one and authorize G'1 extremely ONU1；In like manner, ONU2 does same process in G2 authorized window；ONU1, in Gs1 authorized window, uploads GOOSE and MMS report Literary composition, as it is shown in figure 1, GOOSE1-2 is medium priority message, MMS1-2 is low priority message, and GOOSE and MMS message it After and then upload the 2nd REPORT message, in like manner, ONU2 does same process in Gs2 authorized window.OLT receive ONU1 and After all of 2nd REPORT that ONU2 uploads, statistics plans as a whole distribution bandwidth, and by the bandwidth of distribution respectively by Gs'1, Gs'2 Mandate issues and reports to ONU1 and ONU2.When being authorized by Gs'1, Gs'2, low first bandwidth application to all of GOOSE message Being allocated, the finally bandwidth application to MMS message is allocated.

Technique scheme, has primarily determined that the basic norm of Dynamic Bandwidth Allocation, but, in fixing polling cycle, The various networkings message how to upload each ONU within the limited time makes mandate, it is ensured that whole Dynamic Bandwidth Allocation week The waste of any idle bandwidth is there is not in phase.Therefore, it can continue technique scheme to be optimized for following technical scheme:

Described fixing polling cycle is divided into two sections: SMV and uploads part Tup and GOOSE, MMS upload part Tdown, T_dba=T_up+T_down, set when each polling cycle initializesWithin the Tup time period, when OLT receives what ONU uploaded During REPORT message, the bandwidth application to SMV message therein immediately authorizes, and issue one authorize GATE to ONU, and Update the Tup value in polling cycle；At the end of Tup window, OLT starts to add up GOOSE, MMS band that all ONU upload Wide application, the bandwidth application to the GOOSE message that all ONU apply for carries out bandwidth distribution, the most successively to institute the most successively The bandwidth application having the MMS message of the application of ONU carries out bandwidth distribution, and GOOSE message and MMS message bandwidth authorizing is closed And it is handed down to corresponding ONU in a mandate GATE.Visible, the technical scheme after optimization is according at n-th polling cycle The REPORT message inside received, dynamically distributes bandwidth in (N+1) individual polling cycle, and dynamic bandwidth allocation algorithm calculates Process time, not occupied bandwidth resource, do not also exist the waste of any idle bandwidth in the whole Dynamic Bandwidth Allocation cycle.Below By combining Fig. 2, the technical scheme after optimizing is carried out overall description.

As in figure 2 it is shown, after algorithm initialization, it is judged that whether the current bandwidth distribution moment of EPON network is in n-th In the Tup window of polling cycle, if it is, continue to judge, whether EPON network receives the REPORT of ONU in automatic network Message data, if it is not, then in judging the Tdowm time period that the current bandwidth distribution moment should be the n-th cycle.If it is determined that Obtaining, EPOIN networking receives the REPORT message data of ONU in automatic network, then by calculating SMV message mandate bandwidth Gsv, I, concrete calculating process is:

OLT, in order to ensure that ONU can register at any time, when periodically one section of upstream bandwidth of reservation is registered for new ONU, i.e. carries By this, width to be found that log-in window takies a part, this window have to be larger than the RTT of maximum distance ONU, i.e. round trip delay time.And SMV business requirement of real-time is high, and data traffic is stable, produces a SMV message every 250uS, it is therefore necessary to preferentially protect Demonstrate,prove the distribution of its bandwidth, and need to guarantee that the shake of SMV packet network propagation delay time is little as far as possible.In order to avoid indivedual ONU are found Log-in window affects, or indivedual ONU uploads excessive SMV service bandwidth application improperly and occupies system too much Bandwidth, have impact on other ONU data send fairness.The DBA algorithm be applicable to IEC 61850 that the present invention provides Define an assignable maximum of SMV message and limit the size and above-mentioned discovery registration that bandwidth is BWsv_max, BWsv_max The amount of bandwidth that window takies is relevant, and SMV message mandate bandwidth Gsv of each ONU, i depends on the actual bandwidth application of this ONU Rsv, i, maximum restriction bandwidth BW sv_max and available bandwidth BW1remain, take minima in three,.

G_sv,i=min (R_sv,i,BW_sv-max,BW1_remain), when calculating G_sv,iAuthorize amount of bandwidth by this afterwards, report for SVM GATE is authorized below literary composition.

If it is determined that obtain, the current bandwidth distribution moment should be in the Tdowm time period, then continue to judge, if all of The other GOOSE message of sub-priority is the most all distributed and has been obtained bandwidth, if it is judged that be yes, then continues to determine whether own Last priority level other MMS message the most all distribute and obtained bandwidth.If it is judged that be no, then add up all ONU's GOOSE service bandwidth application Rgoose, i, pre-reservation GOOSE message mandate bandwidth Ggoose in residual available bandwidth, i:

G_goose,i=min (R_goose,i,BW2_remain), wherein BW2remain=BW1remain-Gsv, i.

This is because GOOSE message data have sudden, data volume is less, has requirement of real-time, therefore, it is also necessary to protect Demonstrate,prove the distribution of its bandwidth.The DBA algorithm being applicable to IEC 61850 that the present invention provides, after OLT distributes SMV service bandwidth, GOOSE service bandwidth application is also carried out distribution according to need.

If continuing to determine whether that all of last priority level other MMS message the most all distributes the result having obtained bandwidth Be yes, then continue judge current bandwidth distribute the moment the most also within the Tdowm time period in n-th cycle, if, then draw N polling cycle Dynamic Bandwidth Allocation terminates, and can start the N+1 polling cycle.Continue to determine whether all of the most excellent The MMS message of first rank the most all distributes that to have obtained the result of bandwidth be no, then calculate whole polling cycle T_dbaInterior residue can use EPON bandwidth BW 3_remain, wherein BW3_remain=BW_sum-∑G_{Sv, i}-∑G_goose,i BW_sumIt is initial in n-th polling cycle Available bandwidth, adds up the bandwidth application R of the MMS message to be allocated of all ONU_mms,iSummation Rsum=∑ Rmms, i, and compare Relatively R_sumWith residual available bandwidth BW3_remainBetween relation.

Secondly, it is judged that whether the available bandwidth of residue treats the bandwidth application summation of the MMS message of bandwidth more than all ONU Size, if R_sum≤BW3_remain, then mandate bandwidth G of ONU1 acquisition_mms,iIt is divided into two parts, first reserved from remaining bandwidth R_sumPart, is then divided in application ratio remaining bandwidth, G again_mms,iIt is represented by:

$Gmms,i=Rmms,i+BWremain\×\frac{Rmms,i}{Rsum}$

If R_sum＞ BW3_remain, existing there are two OUN, as a example by being first the traffic assignments bandwidth of OUNI, then ONU1 The mandate bandwidth obtained is directly to divide remaining bandwidth in application ratio, G_mms,iIt is represented by:

$Gmms,i=BWremain\×\frac{Rmms,i}{Rsum}$

Finally, reserved mandate bandwidth G is merged_goose,i, obtain the mandate band that GOOSE, MMS business of ONU1 finally obtains A width of Gi1=G_{Goose, i}+G_mms,i, then repeat the bandwidth allocation of above-mentioned MMS message, complete the MMS message of all ONU Bandwidth distribute, change be ONU1 MMS message distribution after, remain to ONU2 can EPON bandwidth BW remain become For:

BW_remain=BW_sum-∑G1_{Sv, i}-∑G1_goose,i-∑G1_mms,i, according under the MMS message that size is ONU of Gi1 Send out and authorize GATE.

The reason so processed is that MMS message has sudden based on tcp/ip communication, data, real-time Ask the highest, require to do one's best to this type of service bandwidth application, and take into account bandwidth distributional equity, reasonability and bandwidth profit By rate.The DBA algorithm being applicable to IEC 61850 that the present invention provides, for the MMS message of each ONU at EPON band alleviating distention in middle-JIAO Distribution method, for the situation that bandwidth resources are the most sufficient, takes different Bandwidth sharing mechanisms.

The above is only the detailed description of the invention of the present invention, makes to skilled artisans appreciate that or realize this Bright.Multiple amendment to these embodiments will be apparent to one skilled in the art, as defined herein General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, this The bright the embodiments shown herein that is not intended to be limited to, and be to fit to and principles disclosed herein and features of novelty phase The widest consistent scope.

Claims (9)

1. the EPON DBA algorithm being applicable to IEC 61850, it is characterised in that in the network message transmission of IEC 61850 During, use the method that fixing polling cycle and dynamic bandwidth allocation combine, wherein, the network report of described IEC 61850 Literary composition includes SMV, GOOSE, MMS tri-class；The sample rate of SMV message is required consistent with IEC61850 by fixing polling cycle.

A kind of EPON DBA algorithm being applicable to IEC 61850 the most according to claim 1, it is characterised in that by EPON Bandwidth is divided into two classes to authorize respectively, and first kind bandwidth is for authorizing the SMV message transmission of IEC 61850, and Equations of The Second Kind bandwidth is used for Authorize GOOSE and the MMS message transmission of IEC 61850；During distribution EPON, according to described first kind band preference in described second The order-assigned of class bandwidth, in Equations of The Second Kind bandwidth is distributed, it is judged that GOOSE and MMS message transmits whether there is conflict, if deposited , the most preferentially distribution bandwidth is to GOOSE message.

A kind of EPON DBA algorithm being applicable to IEC 61850 the most according to claim 2, it is characterised in that EPON carries Wide GATE issuing mechanism is: in each described fixing polling cycle, and OLT issues twice GATE to each ONU and authorizes, often Secondary issuing rear ONU and obtain authorized window, the GATE issued for the first time authorizes as SMV message bandwidth authorizing, and second time issues GATE authorizes as GOOSE message and MMS message bandwidth authorizing.

A kind of EPON DBA algorithm being applicable to IEC 61850 the most according to claim 3, it is characterised in that IEC The upload mechanism of the network message of 61850 is: during ONU bandwidth application, by the separately application of the priority level of network message, described In authorized window, first uploading SMV message, and and then upload a REPORT message after SMV message, next is uploaded GOOSE and MMS message transmission, and after GOOSE and MMS message, and then upload the 2nd REPORT message.

A kind of EPON DBA algorithm being applicable to IEC 61850 the most according to claim 4, it is characterised in that receive at OLT After all REPORT that all ONU upload, the first bandwidth application to SMV message is preferentially allocated, remaining all In the bandwidth application of ONU, low first bandwidth application to all of GOOSE message is allocated, the finally bandwidth Shen to MMS message Please be allocated.

A kind of EPON DBA algorithm being applicable to IEC 61850 the most according to claim 1, it is characterised in that by described Fixing polling cycle is divided into two sections: SMV uploads part T_upPart T is uploaded with GOOSE, MMS_down, T_dba=T_up+T_down, each Set when polling cycle initializesAt T_upIn time period, when OLT receives the REPORT message that ONU uploads, immediately Bandwidth application to SMV message therein authorizes, and issues one and authorize GATE to ONU, and updates polling cycle Interior T_upValue；At T_upAt the end of window, OLT starts to add up GOOSE, MMS bandwidth application that all ONU upload, the most right The bandwidth application of the GOOSE message of all ONU application carries out bandwidth distribution, reports the MMS of the application of all ONU the most successively The bandwidth application of literary composition carries out bandwidth distribution, and by GOOSE message with under asking that MMS bandwidth authorizing is merged in a mandate GATE in vain Issue corresponding ONU.

A kind of EPON DBA algorithm being applicable to IEC 61850 the most according to claim 5, it is characterised in that described After OLT receives all REPORT that all ONU upload, the first bandwidth application to SMV message is preferentially allocated, remaining In the bandwidth application of all ONU, low first bandwidth application to all of GOOSE message is allocated, the finally band to MMS message Wide application is allocated specifically including:

After OLT receives all REPORT that all ONU upload, the first bandwidth application to SMV message is preferentially allocated, institute State mandate bandwidth G of SMV message_svm,iSize be,

G_sv,i=min (R_sv,i,BW_svmax,BW1_remain)

Wherein, R_sv,iThe bandwidth of SVM message, BW for the actual application of ONU_{sv_max}For can be ONU SVM application can be allocated Limit greatly bandwidth, BW1_remainFor current available bandwidth.

A kind of EPON DBA algorithm being applicable to IEC 61850 the most according to claim 7, it is characterised in that receive at OLT After all REPORT that all ONU upload, the first bandwidth application to SMV message is preferentially allocated, remaining all In the bandwidth application of ONU, low first bandwidth application to all of GOOSE message is allocated, the finally bandwidth Shen to MMS message Please be allocated specifically including:

Mandate bandwidth G of described GOOSE message_goose,iSize be,

G_goose,i=min (R_goose,i,BW2_remain)

Wherein, BW2_remain=BW1_remain-G_{Svm, i}, BW2_remainFor currently available band remaining after distributing all of SVM message Wide.

A kind of EPON DBA algorithm being applicable to IEC 61850 the most according to claim 8, it is characterised in that described After OLT receives all REPORT that all ONU upload, the first bandwidth application to SMV message is preferentially allocated, remaining In the bandwidth application of all ONU, low first bandwidth application to all of GOOSE message is allocated, the finally band to MMS message Wide application is allocated specifically including:

If R_sum≤BW3_remain, mandate bandwidth G of described MMS message_mms,iSize be,

$G_{\mathrm{mms},i}=R_{\mathrm{mms},i}+{\mathrm{BW}3}_{\mathrm{remain}}\×\frac{R_{\mathrm{mms},i}}{R_{\mathrm{sum}}};$

If R_sum＞ BW3_remain, mandate bandwidth G of described MMS message_mms,iSize be,

$G_{mms,i}={\mathrm{BW}}_{3remain}\×\frac{R_{mms,i}}{R_{sum}};$

Wherein, R_sumBandwidth application R for the MMS message to be allocated of all ONU_mms,iSummation, BW3_remainFor for distributing Remaining current available bandwidth after all of SVM message and GOOSE message.