CN103118309B - The method that time-division wavelength-division mixing PON system medium wavelength management channels is selected and switched - Google Patents
The method that time-division wavelength-division mixing PON system medium wavelength management channels is selected and switched Download PDFInfo
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Abstract
The invention discloses a kind of method that time-division wavelength-division mixing PON system medium wavelength management channels is selected and switched, comprise the following steps: each OLT port sends transfer stimulus messages according to port status, and according to corresponding transfer stimulus messages in election state, change between running status and switching state; Under election state, it is territory master port that each OLT port elects an OLT port, and territory master port proceeds to running status and continues the main message of sending domain, and specifies secondary main OLT port; Other OLT ports proceed to running status after receiving the main message in territory; Under operation, be that each ONU assigns operation wavelength using the wavelength channel of territory master port use as wavelength management passage; Secondary main OLT port monitoring ONU complains, if received, proceeds to switching state; Under switching state, cancel territory master port, and enter election state.The present invention, channel that OLT port uses can be selected flexibly as wavelength management passage, and evading default OLT port has the problem that cannot realize wavelength management during fault.
Description
Technical field
The present invention relates to PON system, be specifically related to the method that time-division wavelength-division mixing PON system medium wavelength management channels is selected and switched.
Background technology
Optical Access Network FTTH has broad application prospects as the pith of in Networks of Fiber Communications.But along with enriching of business tine, the bandwidth of demand is more and more higher, EPON or GPON of 1G/2.5 speed and 10G/2.5 speed XG-PON can not meet the demand of future market bandwidth.In next-generation passive optical access network (NG PON2), based on the research of TWDM-PON technology by industry extensive concern.TWDM-PON adopts the PON of wavelength-division and multiplex technique to be called as time-division wavelength-division double decomposition EPON (TWDM-PON).
TWDM-PON adopts increases use wavelength-division multiplex technique technologically speaking than being easier to realization on the basis of original time-division PON, and technology maturation, cost is relative also lower.
TWDM-PON can keep ODN constant, and the splitter namely in ODN is only luminous-power distributor, instead of Wavelength routing or wavelength selector.The method quoting wavelength-division multiplex technique in system is comparatively simple, and wavelength selector just drops to ONU place, and the wavelength channel that concrete ONU uses then is determined by the protocol negotiation of local side and far-end.Therefore, the key of TWDM-PON is the realization that system wavelength manages.
Fig. 1 is shown in by TWDM-PON system architecture schematic diagram.System has N number of OLT(port), each OLT(port) transmission convergence layer meet XG-PON agreement, communicate with ONU.The wavelength channel that concrete ONU uses then is determined by the protocol negotiation of system wavelength management channels by local side OLT and far-end ONU.Common way specifies default OLT(port) wavelength channel that uses is to as management channels, but there is a shortcoming in this way: when default OLT(port) when having a fault, whole system just cannot realize wavelength management.
Summary of the invention
Technical problem to be solved by this invention solves when the default OLT port as wavelength management passage has fault, and whole TWDM-PON system just cannot realize the problem of wavelength management.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is to provide a kind of method that time-division wavelength-division mixing PON system medium wavelength management channels is selected, and comprises the following steps:
Each OLT port sends transfer stimulus messages according to port status, and change election state, carrying out between running status and switching state according to the corresponding transfer stimulus messages received, described transfer stimulus messages comprises election contest message, the main message in territory and general adjustment message;
Under described election state, each OLT port sends election contest message, and to elect an OLT port according to described election contest message be territory master port, described territory master port proceeds to described running status and continues the main message of sending domain to other OLT ports, and specify secondary main OLT port in the message, other OLT ports proceed to described running status after receiving the main message in described territory;
Under described running status, using the wavelength channel of described territory master port use as wavelength management passage, be that each ONU assigns operation wavelength; Secondary main OLT port monitoring ONU complains, and complains, proceed to described switching state if receive ONU;
Under described switching state, cancel territory master port, each OLT port credit value adjustment, and enter described election state.
In the above-mentioned methods, described election contest message comprises 4 codomains: election contest message code, the territory main value of election, the secondary main value of election and send the election contest credit value of port of election contest message;
The main message in described territory comprises 4 codomains: the main message code in territory, elected territory main value and elected secondary main value, the election contest credit value of the port;
Described general adjustment message comprises 2 codomains: general adjustment message code and send the election contest credit value of port of common message.
In the above-mentioned methods, the step of election operation is as follows:
The election contest message of steps A 11, each OLT port broadcast oneself, the territory main value of electing in election contest message and the secondary main value of election are respectively the territory main value of the port and secondary main value;
The election contest message of steps A 12, each other OLT port of OLT port accepts, and judge that the port continues to campaign for, proceed to when selection operation or relinquish one's post in favor of sb. better qualified according to the secondary main value of the territory main value of electing in the election contest message received and election and election contest credit value, if continue election contest, then go to step A11; If relinquished one's post in favor of sb. better qualified, then go to step A13; Work as selection operation if proceeded to, then go to step A14;
Steps A 13, the port of electing election contest credit value high are territory master, amendment election contest message, the territory main value of electing in amended election contest message is the election contest credit value of receiving port, and the secondary main value of election is the election contest credit value of oneself, election contest credit value is constant, goes to step A12;
Whether the election contest message number P of selection oneself that steps A 14, basis receive and the multilevel iudge of OLT port number N are elected to, if P=N-1 or do not receive the credit value of territory main value higher than oneself of election within S second, assert oneself to be territory master, the main message of sending domain also proceeds to running status, and N is OLT port number; Otherwise continue election contest, go to step A12.
In the above-mentioned methods, in steps A 12,
If the territory main value of electing in the election contest message received is higher than the election contest credit value of oneself, then electing the OLT port receiving election contest message is territory master port;
If the territory main value of electing in the election contest message received is unequal with election contest credit value, but the territory main value of electing is equal with the election contest credit value of oneself, then proceed to and whether be elected to judgement operation;
If the territory main value of electing in the election contest message received is equal with election contest credit value, and equal oneself credit value, then the situation that the value that there occurs voter's (OLT port) is equal, the credit value of rollback oneself are described;
If the territory main value of electing in the election contest message received is less than the election of oneself, then continue election contest, send EB packet;
If receive the main message in territory, then proceed to run mode.
In the above-mentioned methods, under operation:
Territory master port continues the main message of sending domain, and takes on territory master to ONU broadcast in band;
After the main message of the main acceptance domain in non-territory, if find, the credit value of oneself equals the secondary main value of electing, then the elected value vice of secondary master putting oneself is 1, continues to broadcast to ONU oneself to take on secondary master in band; Secondary main OLT port monitoring ONU complains, and complains, proceed to described switching state if receive ONU;
After the main message of the main acceptance domain in non-territory, if find, the credit value of oneself is not equal to the secondary main value of election, now, if receive the secondary main general adjustment message sent, proceeds to switching state.
In the above-mentioned methods, under switching state, the credit value method adjusting each port is as follows:
Territory is main when receiving general adjustment message, and reduced by the credit value of oneself, the concrete practice is that the credit value of oneself deducts (N-1), and N is port number, if when this operation makes the credit value of oneself be negative value, then sets the credit value of oneself as 0, and proceeds to election state;
Non-territory is main then adds 1 by the credit value of oneself when receiving general adjustment message, and proceeds to election state;
The credit value of secondary chief commander oneself adds 1.
In the above-mentioned methods, the described method continuing to take on territory master to ONU broadcast or take on pair main in band is: namely utilize PLOAM or other Overhead Messages in XG-PON, sends containing elected territory main value and administrative messag or the overhead byte of being elected to secondary main value.
In the above-mentioned methods, the method that described ONU complains is: ONU utilizes PLOAM or other Overhead Messages in XG-PON, middlely sends request to secondary master the administrative messag or overhead byte that wavelength do not respond up.
The present invention, TWDM-PON system has the ability to reselect channel that a certain OLT port uses as wavelength management passage, when original (territory master) OLT port has fault, all the other normal OLT ports may be selected wavelength management passage, and so just can evade default OLT port has the problem that cannot realize wavelength management during fault.
Accompanying drawing explanation
Fig. 1 is the block architecture diagram of TWDM-PON system;
Fig. 2 is schematic flow sheet of the present invention;
Fig. 3 is the state transitions schematic diagram of OLT port in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in Figure 1, Figure 2, Figure 3 shows, the method for time-division wavelength-division mixing PON system provided by the invention medium wavelength management channels selection and switching realizes in the following manner:
Each OLT port sends transfer stimulus messages according to port status, and change election state, carrying out between running status and switching state according to the corresponding transfer stimulus messages received, described transfer stimulus messages comprises election contest message, the main message in territory and general adjustment message;
Under described election state, each OLT port sends election contest message, and to elect an OLT port according to described election contest message be territory master port (the main OLT port in territory, be called for short territory master), described territory master port proceeds to described running status and continues the main message of sending domain to other OLT ports, and specify secondary master port (secondary main OLT port is called for short secondary main) in the message, other OLT ports proceed to described running status after receiving the main message in described territory;
Under described running status, using the wavelength channel of described territory master port use as wavelength management passage, be that each ONU assigns operation wavelength; Secondary main OLT port monitoring ONU complains, if receive ONU to complain, proceed to described switching state, the method that ONU complains is: ONU utilizes PLOAM or other Overhead Messages in XG-PON, middlely sends request to secondary master the administrative messag or overhead byte that wavelength do not respond up;
Under described switching state, cancel territory master port, each OLT port adjustment credit value, and enter described election state.
Election contest message A refers to that port puts up the message of territory master, comprises 4 codomains: election contest message code AO(AO=1), the territory main value A1 that elects, election secondary main value A2 and send the election contest credit value AY of port of election contest message.
The main message B in territory is the message that territory master has selected, and comprises 4 codomains: the main message code BO(BO=2 in territory), the election contest credit value BY of elected territory main value B1 and elected secondary main value B2, the port.
General adjustment message C refers to that the OLT port discovery as secondary master has ONU to complain and the message that sends, general adjustment message C is the message needing again to campaign for territory master, can only be sent by secondary master, comprise 2 codomains: general adjustment message code CO(CO=3) and oneself election contest credit value CY.
Port receives election contest message event under election state EL, then perform election operation, and maintain election state EL, the each port of OLT starts election process, electing a port by election mechanism is the main DM in territory, when a port is chosen as territory master time, then proceed to running status, its wavelength channel used is wavelength management channel, carries out the work of normal ONU wavelength assignment by territory master port; Work as system malfunctions, carry out the main handover operation in territory.Election mechanism is a kind of by the outer process controlling interacting message generating domain master of band, strives for territory master between each port by the outer control message of band.Receive the main message event in territory under port election state EL, then proceed to running status RN.After each port of OLT completes election process, then proceed to running status respectively.
Port receives general adjustment message event under operation, then proceed to switching state SW, and namely territory is main switches, main forfeiture territory, territory owner identification.
Port, under switching state, is cancelled territory master port, is re-elected territory master, after switching state SW complete operation, unconditionally proceed to election state EL, i.e. OLT but also start to conduct an election.
Under election state EL, the step of the election operation of port is as follows:
The election contest message of steps A 11, each OLT port broadcast oneself, the territory main value A2 elected in election contest message and the secondary main value A3 of election is respectively the territory main value of the port and secondary main value.
The election contest message of steps A 12, each other OLT port of OLT port accepts, and judge that the port continues to campaign for, proceed to when selection operation or relinquish one's post in favor of sb. better qualified according to the secondary main value of the territory main value of electing in the election contest message received and election and election contest credit value, if continue election contest, then go to step A11; If relinquished one's post in favor of sb. better qualified, then go to step A13; Work as selection operation if proceeded to, then go to step A14.
If the territory main value of electing in the election contest message received is higher than the election contest credit value of oneself, then electing the OLT port receiving election contest message is territory master port;
If the territory main value of electing in the election contest message received is unequal with election contest credit value, but the territory main value of electing is equal with the election contest credit value of oneself, then proceed to and whether be elected to judgement operation;
If the territory main value of electing in the election contest message received is equal with election contest credit value, and equal oneself credit value, then the situation that the value that there occurs voter's (OLT port) is equal, the credit value of rollback oneself are described;
If the territory main value of electing in the election contest message received is less than the election of oneself, then continue election contest, send EB packet;
If receive the main message in territory, then proceed to run mode.
Steps A 13, the port of electing election contest credit value high are territory master, amendment election contest message, the territory main value of electing in amended election contest message is the election contest credit value of receiving port, and the secondary main value of election is the election contest credit value of oneself, election contest credit value is constant, goes to step A12;
Whether the election contest message number P of selection oneself that steps A 14, basis receive and the multilevel iudge of OLT port number N are elected to, if P=N-1 or do not receive the credit value of territory main value higher than oneself of election within S second, assert oneself to be territory master, the main message of sending domain also proceeds to running status, and N is OLT port number; Otherwise, continue election contest, go to step A12;
Under operation:
Territory master port continues the main message of sending domain, and takes on territory master to ONU broadcast in band, and the method for employing is: utilize PLOAM or other Overhead Messages in XG-PON, sends administrative messag or overhead byte containing being elected to territory main value and elected secondary main value;
After the main message of the main acceptance domain in non-territory, if find, the credit value of oneself equals the secondary main value of electing, the elected value vice of secondary master then putting oneself is 1, continue to broadcast to ONU in band oneself to take on secondary master, the method adopted is: utilize PLOAM or other Overhead Messages in XG-PON, sends containing elected territory main value and administrative messag or the overhead byte of being elected to secondary main value; Secondary main OLT port monitoring ONU complains, and complains, proceed to switching state if receive ONU;
Vice is the built-in variable of an OLT port, and be just shown to be secondary master when OLT monitors when vice is 1, the port that ONU agreement is complained is secondary master port, only have secondary master port could initiate to re-elect (by monitoring complaint, then send general adjustment message, enter sw, then enter election state).
After the main message of the main acceptance domain in non-territory, if find, the credit value of oneself is not equal to the secondary main value (being common OLT port) of election, now, if receive the secondary main general adjustment message sent, proceeds to switching state.
Under switching state, the credit value method adjusting each port is as follows:
Territory is main when receiving general adjustment message, and reduced by the credit value of oneself, the concrete practice is that the credit value of oneself deducts (N-1), and N is port number, if when this operation makes the credit value of oneself be negative value, then sets the credit value of oneself as 0, and proceeds to election state;
Non-territory is main then adds 1 by the credit value of oneself when receiving general adjustment message, and proceeds to election state.
The credit value of secondary chief commander oneself adds 1.
Below in conjunction with an instantiation, the present invention will be described in detail.
In this instantiation, OLT has three port vote mechanism, is respectively port D1, port D2 and port D3.
Switch process (state transitions) between the three state (election state, running status and switching state) that port D1, port D2 and each self-operating of port D3 are a above-mentioned, each OLT port sends transfer stimulus messages according to port status, and according to the stimulus messages transfering state received.
Three port D1 of process (time period) 0:OLT, D2 and D3 enters election contest state EL and campaigns for territory master, under initial condition: the election contest credit value AY11=99 of port D1, the election contest credit value AY21=98 of port D2, the election contest credit value AY31=97 of port D3, the initial value AY of election contest credit value is according to each port sequence number by system, the information distribution such as MAC Address, each port is all not identical, if the initial value of the election contest credit value of some ports is identical with the initial value of the election contest credit value of other ports, then one of them port needs employing to want fallback mechanism to redistribute.
Process (time period) 1: the election contest message of each OLT port broadcast oneself, the territory of electing in the election contest message secondary master elected that advocates peace be the territory main value of the port and secondary main value, campaigns for the election contest credit value that credit value is the port;
Port D1 sends election contest message a1, the main A11=99 in territory elected in election contest message a1, the main A21=0 of pair of election, oneself election contest credit value AY11=99;
Port D2 sends election contest message a2, the main A21=98 in territory elected in election contest message a2, the main A22=0 of pair of election, oneself election contest credit value AY21=98;
Port 3 sends election contest message a3, the main A31=97 in territory elected in election contest message a3, the main A33=0 of pair of election, oneself election contest credit value AY31=97.
Process (time period) 2: the election contest message of each other OLT port of OLT port accepts, and according to the territory of electing in the election contest message received advocate peace elect secondary master and election contest credit value judge continue election contest or relinquish one's post in favor of sb. better qualified, if continue election contest, then continue to send election contest message; If relinquished one's post in favor of sb. better qualified, the port of then electing election contest credit value high is territory master, amendment election contest message, the territory main value of electing in amended election contest message is the election contest credit value of receiving port, the secondary master of election is the election contest credit value of oneself, election contest credit value is constant, represents and oneself can work as secondary master, and the territory main value of electing is the election contest credit value of receiving port.
In this example:
After port D1 receives election contest message a2, find the election contest credit value AY11=99 of election contest credit value AY21=98 lower than oneself of port D2, illustrate and oneself be hopeful to be elected to, continue to send election contest message a1; After port D1 receives election contest message a3, find the election contest credit value AY11=99 of election contest credit value AY31=97 lower than oneself of port 3, illustrate and oneself be hopeful to be elected to, continue to send election contest message a1;
After port D2 receives election contest message a1, find the election contest credit value AY11=99 of port D1, higher than the election contest credit value AY21=98 of oneself, so relinquish one's post in favor of sb. better qualified (electing port D1 is territory master), amendment election contest message a2, the main A21=99 in territory elected in amended election contest message a2, the main A22=98 of pair of election, election contest credit value AY21=98, represent that oneself AY21=98 can work as secondary main, the qualification of electing territory master is: A21=99;
After port D3 receives election contest message a1, find the election contest credit value AY11=99 of port D1, higher than the election contest credit value AY21=97 of oneself, so relinquish one's post in favor of sb. better qualified, electing port D1 is territory master, amendment election contest message a3, the main A31=99 in territory elected in amended election contest message a3, the main A21=97 of pair of election, election contest credit value AY31=97, represent that oneself AY31=97 can work as secondary main, the qualification of electing territory master is A21=99.
After port D1 receives amended election contest message a2, a3, to find in election contest message a2, a3 that the territory of electing election contest credit value of advocating peace is unequal, but the territory main value of electing is equal with the election contest credit value of oneself, assert amended election contest message a2, a3 selecting oneself, so turn over journey 3, proceed to whether elected judgement operates.
Process (time period) 3: the election contest message number P that port D1 alternative oneself receives and OLT port number N, now P=N-1=2(or the territory main value that do not receive election in setting-up time are higher than the election contest message of oneself election contest credit value), then port D1 judges oneself to be elected as territory master, turns over journey 4.
Process (time period) 4: port D1 continues the main message b1 of sending domain to port D2 and port D3, territory main value B1=99 elected in the main message b1 in territory, elected secondary main value B2=98, port D2 and the main message b1 of port D3 acceptance domain;
Process (time period) 5: port D1, port D2 and port D3 proceed to running status RN, using the wavelength channel of port D1 use as wavelength management passage, is that each ONU assigns operation wavelength;
Process (time period) 6: secondary master port judges whether that receiving ONU complains, and receives complaint for secondary main OLT D2 in this instance, therefore turns over journey 7;
Process (time period) 7: secondary main OLT port D2 receives ONU and complains, so to other OLT ports broadcast general adjustment message c1.
Process (time period) 8: the election contest credit value of secondary master oneself adds 1; Other election contest credit value not being secondary OLT port that is main or territory master have received general adjustment message oneself adds 1.Then election state EL is entered.
In this example, the election contest credit value AY21=98+1=99(of port D2 is because the election contest credit value AY21 that port D2 is secondary primary and secondary master adds 1); Enter election state EL.
After port D3 receives general adjustment message c1, (the main advance in non-former territory) campaigns for credit value AY31=AY31+1=97+1=98; Enter election state EL.
Territory main OLT port (port D1) receives after general adjustment message after c1, and (the main self-denigration in former territory) campaigns for credit value AY11=AY11-(N-1)=99-2=97; Enter election state EL.
As shown in the table: to be in election contest state at each port of process number 1 to 3, OLT, each port of process number 4 to 6, OLT is in running status, and each port of numbering 7 to 8, OLT is in switching state.
Beneficial effect:
1) the present invention is a kind of implementation of TWDM PON system OLT, and it can meet one of requirement of NG PON2, and makes TWDM PON and conventional P ON share an ODN, protects the existing investment of operator, has saved the construction cost of network.
2) present invention achieves the mechanism that wavelength management channel selecting is protected automatically, enhance the robustness of system.
3) OLT(port of the present invention) different physical locations (machine dish) can be distributed in, achieve OLT(port) independence.
4) the main election contest in territory of the present invention mechanism with fixing or specify in advance single wavelength as management channels method compared with, there is higher reliability.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change made under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (7)
1. the method for the selection of time-division wavelength-division hybrid passive fiber optic network PON system medium wavelength management channels and switching, is characterized in that, comprise the following steps:
Each optical line terminal OLT port sends transfer stimulus messages according to port status, and change election state, carrying out between running status and switching state according to the corresponding transfer stimulus messages received, described transfer stimulus messages comprises election contest message, the main message in territory and general adjustment message;
Under described election state, each OLT port sends election contest message, and to elect an OLT port according to described election contest message be territory master port, described territory master port proceeds to described running status and continues the main message of sending domain to other OLT ports, and specify secondary main OLT port in the message, other OLT ports proceed to described running status after receiving the main message in described territory;
Under described running status, using the wavelength channel of described territory master port use as wavelength management passage, be that each optical-fiber network allocation units ONU assigns operation wavelength; Secondary main OLT port monitoring ONU complains, and complains, send described general adjustment message, and proceed to described switching state if receive ONU;
Under described switching state, cancel territory master port, each OLT port credit value adjustment, and enter described election state;
Described election contest message comprises 4 codomains: election contest message code, the territory main value of election, the secondary main value of election and send the election contest credit value of port of election contest message;
The main message in described territory comprises 4 codomains: the main message code in territory, elected territory main value and elected secondary main value, the election contest credit value of the port;
Described general adjustment message comprises 2 codomains: general adjustment message code and send the election contest credit value of port of common message.
2. the method for time-division wavelength-division mixing PON system as claimed in claim 1 medium wavelength management channels selection and switching, it is characterized in that, the step of election operation is as follows:
The election contest message of steps A 11, each OLT port broadcast oneself, the territory main value of electing in election contest message and the secondary main value of election are respectively the territory main value of the port and secondary main value;
The election contest message of steps A 12, each other OLT port of OLT port accepts, and judge that the port continues to campaign for, proceed to when selection operation or relinquish one's post in favor of sb. better qualified according to the secondary main value of the territory main value of electing in the election contest message received and election and election contest credit value, if continue election contest, then go to step A11; If relinquished one's post in favor of sb. better qualified, then go to step A13; Work as selection operation if proceeded to, then go to step A14;
Steps A 13, the port of electing election contest credit value high are territory master, amendment election contest message, the territory main value of electing in amended election contest message is the election contest credit value of receiving port, and the secondary main value of election is the election contest credit value of oneself, election contest credit value is constant, goes to step A12;
Whether the election contest message number P of selection oneself that steps A 14, basis receive and the multilevel iudge of OLT port number N are elected to, if P=N-1 or do not receive the credit value of territory main value higher than oneself of election within S second, assert oneself to be territory master, the main message of sending domain also proceeds to running status, and N is OLT port number; Otherwise continue election contest, go to step A12.
3. the method for time-division wavelength-division mixing PON system as claimed in claim 2 medium wavelength management channels selection and switching, is characterized in that, in steps A 12,
If the territory main value of electing in the election contest message received is higher than the election contest credit value of oneself, then electing the OLT port receiving election contest message is territory master port;
If the territory main value of electing in the election contest message received is unequal with election contest credit value, but the territory main value of electing is equal with the election contest credit value of oneself, then proceed to and whether be elected to judgement operation;
If the territory main value of electing in the election contest message received is equal with election contest credit value, and equal oneself credit value, then the situation that the value that there occurs voter's (OLT port) is equal, the credit value of rollback oneself are described;
If the territory main value of electing in the election contest message received is less than the election of oneself, then continue election contest, send EB packet;
If receive the main message in territory, then proceed to run mode.
4. the method for time-division wavelength-division mixing PON system as claimed in claim 1 medium wavelength management channels selection and switching, is characterized in that, under operation:
Territory master port continues the main message of sending domain, and takes on territory master to ONU broadcast in band;
After the main message of the main acceptance domain in non-territory, if find, the credit value of oneself equals the secondary main value of electing, then the elected value vice of secondary master putting oneself is 1, continues to broadcast to ONU oneself to take on secondary master in band; Secondary main OLT port monitoring ONU complains, and complains, proceed to described switching state if receive ONU;
After the main message of the main acceptance domain in non-territory, if find, the credit value of oneself is not equal to the secondary main value of election, now, if receive the secondary main general adjustment message sent, proceeds to switching state.
5. the method for time-division wavelength-division mixing PON system as claimed in claim 1 medium wavelength management channels selection and switching, it is characterized in that, under switching state, the credit value method adjusting each port is as follows:
Territory is main when receiving general adjustment message, and reduced by the credit value of oneself, the concrete practice is that the credit value of oneself deducts (N-1), and N is port number, if when this operation makes the credit value of oneself be negative value, then sets the credit value of oneself as 0, and proceeds to election state;
Non-territory is main then adds 1 by the credit value of oneself when receiving general adjustment message, and proceeds to election state;
The credit value of secondary chief commander oneself adds 1.
6. the method for time-division wavelength-division mixing PON system as claimed in claim 4 medium wavelength management channels selection and switching, it is characterized in that, the method continuing to take on territory master to ONU broadcast or take on pair main in band is: namely utilize physical layer operations in 10 Gigabit-capable Passive Optical Network XG-PON to administer and maintain PLOAM or other Overhead Messages, sends containing elected territory main value and administrative messag or the overhead byte of being elected to secondary main value.
7. the method for time-division wavelength-division mixing PON system as claimed in claim 2 medium wavelength management channels selection and switching, it is characterized in that, the method that described ONU complains is: ONU utilizes physical layer operations in 10 Gigabit-capable Passive Optical Network XG-PON to administer and maintain PLOAM or other Overhead Messages, middlely sends request to secondary master the administrative messag or overhead byte that wavelength do not respond up.
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| CN104837077B (en) | 2014-02-12 | 2019-05-07 | 中兴通讯股份有限公司 | Optical line terminal/optical network unit wavelength tuning method and device |
| CN106576066A (en) * | 2014-08-26 | 2017-04-19 | 三菱电机株式会社 | Slave station apparatus, master station apparatus, optical communication system, and abnormality detection method |
| WO2016077952A1 (en) * | 2014-11-17 | 2016-05-26 | 华为技术有限公司 | Optical line terminal, optical network unit, and passive optical network system |
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| CN101616171A (en) * | 2008-06-27 | 2009-12-30 | 华为技术有限公司 | A kind of methods, devices and systems of retaining node guiding state |
| CN102820943A (en) * | 2012-08-15 | 2012-12-12 | 烽火通信科技股份有限公司 | Wavelength management method between OLT (optical line terminal) and ONU (optical network unit) in TWDM-PON (time wavelength division multiplexing-passive optical network) |
| CN102833030A (en) * | 2012-08-31 | 2012-12-19 | 烽火通信科技股份有限公司 | TWDM-PON (Time Wavelength Division Multiplexing-Passive Optical Network) ONU (Optical Network Unit) implementation device and method based on cyclical optical tunable filter |
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| CN101616171A (en) * | 2008-06-27 | 2009-12-30 | 华为技术有限公司 | A kind of methods, devices and systems of retaining node guiding state |
| CN102820943A (en) * | 2012-08-15 | 2012-12-12 | 烽火通信科技股份有限公司 | Wavelength management method between OLT (optical line terminal) and ONU (optical network unit) in TWDM-PON (time wavelength division multiplexing-passive optical network) |
| CN102833030A (en) * | 2012-08-31 | 2012-12-19 | 烽火通信科技股份有限公司 | TWDM-PON (Time Wavelength Division Multiplexing-Passive Optical Network) ONU (Optical Network Unit) implementation device and method based on cyclical optical tunable filter |
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