CN103391486B - A kind of method and optical line terminal and optical network unit for carrying out wavelength adjustment - Google Patents
A kind of method and optical line terminal and optical network unit for carrying out wavelength adjustment Download PDFInfo
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Abstract
The present invention provides a kind of method and optical line terminal and optical network unit and system for carrying out wavelength adjustment, applied in passive optical network, optical line terminal sends the former operation wavelength of adjustment to optical network unit and adjusts the former operation wavelength to the target wavelength to the message of target wavelength, the optical network unit；After adjusting successfully, the optical network unit successfully indicates in the passage of the target wavelength to the optical line terminal feedback adjustment；Or after adjustment failure, the optical network unit is in the passage of the former operation wavelength to the instruction of optical line terminal feedback adjustment failure.The rationalization realization that this programme can carry out wavelength adjustment for optical network unit provides solution, improves the process performance of passive optical network.
Description
Technical field
The present invention relates to passive optical network in the communications field, more particularly to a kind of method and light for carrying out wavelength adjustment
Line terminal and optical network unit.
Background technology
The Ethernet passive optical network of standardization（Ethernet Passive Optical Network, abbreviation EPON）With
Gigabit passive optical network（Gigabit Passive Optical Network, abbreviation GPON）All it has been by institute of operator
Extensive use.No matter the technology mechanism on upper strata there are which kind of difference, EPON and GPON and its follow-up 10GEPON and
10GGPON belongs to the passive optical network of time division multiplexing（Time-Division Multiplexing Passive
Optical Network, abbreviation TDM-PON）Technical system：Optical line terminal（Optical Line Terminal, referred to as
OLT）With all optical network units（Optical Network Unit, abbreviation ONU）Led to by a pair of of uplink and downlink wavelength
Letter, wherein ONU carry out data transmission in upstream wavelength according to the OLT different time sections dispatched.
Present industry is discussing next-generation passive optical network（NG-PON2）Technique direction, wherein emerging a variety of skills
Art system, includes wavelength-division multiplex PON（Wavelength Division Multiplexing PON, abbreviation WDM-PON）, the time-division
Wavelength-division multiplex PON（Time-Wavelength Division Multiplexing PON, abbreviation TWDM-PON）, orthogonal frequency
It is multiplexed PON（Orthogonal frequency-division multiplexing, abbreviation OFDM-PON）, and aforementioned mechanism
PON system type of mixing etc..But either any technical system, is extended on the basis of a pair of of operation wavelength
Multipair operation wavelength works.
Such as WDM-PON systems, it is each whole in this novel passive optical network system transmitted based on multi-wavelength single fiber
End subscriber individually takes a pair of of uplink and downlink wavelength channel, and multiple wavelength channels pass through wavelength-division multiplex in uplink or down direction
Mode transmitted in same root trunk fiber, its main feature is that each terminal user exclusively enjoys a wavelength bandwidth resource.
Such as TWDM-PON systems, it is mainly characterized by multiple TDM-PON systems passing through multipair operation wavelength（General 4-
8 pairs）Mode be stacked up, OLT is built-in with multipair operation wavelength processing module, and ONU, can be by that can readjust the distribution to keep colourless
Penetrate and/or the mode of adjustable reception is come in a pair of of the operation wavelength of work in the olt.
No matter any system of above-mentioned distance, all bring a problem, be how to the progress of the operation wavelength of ONU
Setting, adjustment and management.A kind of simplest mode is exactly operation wavelengths of all ONU using fixation, but this can give fortune
Battalion business brings great inventory cost pressure.It must be solved so as to which ONU operation wavelengths are adjusted in exactly following PON system development
The problem of.
The mode of some adjusting wavelengths has been proposed in industry, for example optical line terminal sends wavelength tune to optical network unit
Whole order, but concrete methods of realizing is all also the scheme of exemplary in nature, is not directed to some during actual wavelength is adjusted
Particular problem, therefore, it is necessary to propose corresponding solution in actually available system.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of method and optical line terminal and light net for carrying out wavelength adjustment
Network unit and system, the rationalization realization that wavelength adjustment is carried out for optical network unit provide solution.
In order to solve the above technical problem, the present invention provides a kind of method for carrying out wavelength adjustment, applied to passive light
In network, wherein, optical line terminal sends the former operation wavelength of adjustment to the message of target wavelength, the light net to optical network unit
Network unit adjusts the former operation wavelength to the target wavelength；After adjusting successfully, the optical network unit is in the target
Successfully indicated to the optical line terminal feedback adjustment in the passage of wavelength；Or after adjustment failure, the optical network unit
To the instruction of optical line terminal feedback adjustment failure in the passage of the former operation wavelength.
Further, the above method can also have the characteristics that：
The original operation wavelength refers to that the optical network unit carries out wavelength used in wavelength adjustment before, including uplink
Wavelength and downstream wavelength;
The target wavelength refers to that the optical network unit successfully carries out the wavelength that should be used after wavelength adjustment, including upper
Traveling wave length and downstream wavelength.
Further, the above method can also have the characteristics that：
The optical line terminal sends uplink transmission resource information in the passage of the target wavelength, and in the former work
Make to send uplink transmission resource information in the passage of wavelength；
After the optical network unit adjusts successfully, according to the uplink transmission resource sent in the passage of the target wavelength
The successfully instruction of information feedback；Or after the optical network unit adjustment failure, use institute in the passage of the former operation wavelength
The instruction of the uplink transmission resource information feeding back unsuccessful of transmission.
Further, the above method can also have the characteristics that：
The message that the optical line terminal sends adjustment former operation wavelength to target wavelength to the optical network unit is specific
Refer to：The optical line terminal sends type of message as wavelength adjustment requirement to the optical network unit and carries target wavelength letter
The physical layer operations management service message of breath, or optical network unit management control interface message, or operation management maintainance message；
The target wavelength information includes at least one of following parameters：The wavelength absolute value of target wavelength, target wavelength
Wavelength number, target wavelength compared to the former operation wavelength used before adjustment adjustment direction, before target wavelength is compared to adjustment
The adjustment amount of the former operation wavelength used.
In order to solve the above-mentioned technical problem, present invention also offers a kind of method for carrying out operation wavelength adjustment, it is applied to
In passive optical network, wherein, optical line terminal sends the former operation wavelength of adjustment to the message of target wavelength to optical network unit, and
Wavelength is set to adjust the value of tolerance thresholding duration not less than the sum of following three values：The wavelength switching duration of the optical network unit
Twice, the single physical layer synchronization duration of the optical network unit, the optical network unit is completed needed for adjustment result feedback
Handling duration.
Further, the above method can also have the characteristics that：
The wavelength switching duration refers to minimum value tune of the optical network unit by operation wavelength in transmitter from permission
The whole maximum to permission, or the duration for the minimum value for being adjusted to allow from the maximum of permission, or work from original
Wavelength is adjusted to the single duration of target wavelength；
The single physical layer synchronization duration refers to that the optical network unit completes the physical layer with the optical line terminal
Synchronous required duration.
Further, the above method can also have the characteristics that：
After the optical line terminal sends the message to optical network unit, adjusted in the wavelength in tolerance thresholding duration
Suppress the optical network unit and disconnect caused alarm with the optical line terminal.
Further, the above method can also have the characteristics that：
After the optical line terminal sends the message to optical network unit, adjusted in the wavelength in tolerance thresholding duration
It is anti-for receiving optical network unit to optical network unit transmission in the passage of former operation wavelength and the passage of target wavelength
Present the uplink transmission resource information of instruction.
In order to solve the above-mentioned technical problem, present invention also offers a kind of optical line terminal, wherein, the optical line terminal
Including wavelength adjustment control module and adjustment result receiving module；
The wavelength adjusts control module, for sending former operation wavelength the disappearing to target wavelength of adjustment to optical network unit
Breath；
The adjustment result receiving module, for receiving the optical network unit feedback on the passage of the target wavelength
Adjustment successfully indicate, or the adjustment failure of the optical network unit feedback is received on the passage of the former operation wavelength
Instruction.
Further, above-mentioned optical line terminal can also have the characteristics that：
The original operation wavelength refers to that the optical network unit carries out wavelength used in wavelength adjustment before, including uplink
Wavelength and downstream wavelength;
The target wavelength refers to that the optical network unit successfully carries out the wavelength that should be used after wavelength adjustment, including upper
Traveling wave length and downstream wavelength.
Further, above-mentioned optical line terminal can also have the characteristics that：
The optical line terminal further includes uplink transmission resource sending module；
Uplink transmission resource sending module, in the passage of former operation wavelength and the passage of target wavelength to the light
Network unit sends the uplink transmission resource information for being used for receiving optical network unit feedback instruction.
Further, above-mentioned optical line terminal can also have the characteristics that：
The message refers to type of message for wavelength adjustment requirement and carries the physical layer operations management of target wavelength information
Safeguard message, or optical network unit management control interface message, or operation management maintainance message；
The target wavelength information includes at least one of following parameters：The wavelength absolute value of target wavelength, target wavelength
Wavelength number, target wavelength compared to the former operation wavelength used before adjustment adjustment direction, before target wavelength is compared to adjustment
The adjustment amount of the former operation wavelength used.
In order to solve the above-mentioned technical problem, present invention also offers a kind of optical line terminal, wherein, the optical line terminal
Control module and wavelength adjustment tolerance thresholding duration setup module are adjusted including wavelength；
The wavelength adjusts control module, for sending former operation wavelength the disappearing to target wavelength of adjustment to optical network unit
Breath；
The wavelength adjustment tolerance thresholding duration setup module, the value for setting wavelength adjustment tolerance thresholding duration be not small
In the sum of following three values：Twice of the wavelength switching duration of the optical network unit, the single physical layer of the optical network unit
Synchronous duration, the optical network unit complete the handling duration needed for adjustment result feedback.
Further, above-mentioned optical line terminal can also have the characteristics that：
The wavelength switching duration refers to minimum value tune of the optical network unit by operation wavelength in transmitter from permission
The whole maximum to permission, or the duration for the minimum value for being adjusted to allow from the maximum of permission, or work from original
Wavelength is adjusted to the single duration of target wavelength；
The single physical layer synchronization duration refers to that the optical network unit completes the physical layer with the optical line terminal
Synchronous required duration.
Further, above-mentioned optical line terminal can also have the characteristics that：
The wavelength adjusts control module, is additionally operable to after sending the message to the optical network unit, in the wavelength
The interior suppression optical network unit of adjustment tolerance thresholding duration and the optical line terminal alert caused by disconnecting.
Further, above-mentioned optical line terminal can also have the characteristics that：
The wavelength adjusts control module, is additionally operable to after sending the message to optical network unit, is adjusted in the wavelength
Sent in tolerance thresholding duration in the passage of former operation wavelength and the passage of target wavelength to the optical network unit and be used to connect
Receive the uplink transmission resource information of optical network unit feedback instruction.
In order to solve the above-mentioned technical problem, present invention also offers a kind of optical network unit, wherein, the optical network unit
Processing module and switching result feedback module are adjusted including wavelength；
The wavelength adjusts processing module, for receiving the adjustment original operation wavelength of optical line terminal transmission to target wavelength
Message, the former operation wavelength is adjusted to the target wavelength；
It is described adjustment result feedback module, for the wavelength adjustment processing module adjust successfully after, in the target
Successfully indicated to the optical line terminal feedback adjustment in the passage of wavelength；Or in wavelength adjustment processing module adjustment
After failure, to the instruction of optical line terminal feedback adjustment failure in the passage of the former operation wavelength.
Further, above-mentioned optical network unit can also have the characteristics that：
The optical network unit further includes uplink transmission resource receiving module；
The uplink transmission resource receiving module, for the wavelength adjustment processing module adjust successfully after, in target
Uplink transmission resource information is received on the passage of wavelength, or after wavelength adjustment processing module adjustment failure, in former work
Make to receive uplink transmission resource information on the passage of wavelength.
Further, above-mentioned optical network unit can also have the characteristics that：
It is described adjustment result feedback module, for the wavelength adjustment processing module adjust successfully after, according to the mesh
Mark the uplink transmission resource information feedback successfully instruction in wavelength channel；Or lost in wavelength adjustment processing module adjustment
After losing, according to the instruction of the uplink transmission resource information feeding back unsuccessful in the former operation wavelength passage.
In order to solve the above-mentioned technical problem, present invention also offers a kind of passive optical network, including above-mentioned optical link
Terminal and above-mentioned optical network unit.
The rationalization realization that this programme can carry out wavelength adjustment for optical network unit provides solution, improves passive light
The process performance of network system.
Brief description of the drawings
Fig. 1 is the schematic diagram for the method that wavelength adjustment is carried out in embodiment；
Fig. 2 is the processing method schematic diagram in the case of optical network unit adjusts successfully in embodiment；
Fig. 3 is the processing method schematic diagram under optical network unit adjustment failure scenarios in embodiment.
Embodiment
As shown in Figure 1, the method applied to the progress wavelength adjustment in passive optical network includes：OLT sends to ONU and adjusts
For former operation wavelength to the message of target wavelength, the ONU adjusts the former operation wavelength to the target wavelength；Adjust successfully
Afterwards, the ONU is successfully indicated in the passage of the target wavelength to the optical line terminal feedback adjustment；Or adjustment is lost
After losing, the ONU is in the passage of the former operation wavelength to the instruction of optical line terminal feedback adjustment failure.
The original operation wavelength refers to the ONU used wavelength before wavelength adjustment is carried out, including upstream wavelength
And downstream wavelength；The target wavelength refers to that the ONU successfully carries out the wavelength that should be used after wavelength adjustment, including upgoing wave
Long and downstream wavelength.
The OLT sends uplink transmission resource information in the passage of the target wavelength, and in the former operation wavelength
Passage in send uplink transmission resource information；After the ONU is adjusted successfully, according to sent in the passage of the target wavelength
Uplink transmission resource information feedback successfully instruction；Or after the ONU adjustment failure, use the logical of the former operation wavelength
The instruction of uplink transmission resource information feeding back unsuccessful sent in road.
The message that OLT sends adjustment operation wavelength to target wavelength to ONU specifically refers to：OLT sends type of message to ONU
For wavelength adjustment requirement（Wavelength adjust request）And carry the physical layer operations of the information of the target wavelength
Management service message (Physical Layer Operations Administration and Maintenance, referred to as
PLOAM) or optical network unit management control interface message (ONU Management and Control Interface, referred to as
) or operation management maintainance message OMCI（Operations Administration and Maintenance, abbreviation OAM）.On
It can be the OAM message in PLOAM or OMCI, or EPON system in GPON systems to state message, or in Ethernet
OAM message.The information of target wavelength includes at least one of following parameters：The wavelength absolute value of target wavelength, target wavelength
Wavelength number, target wavelength compared to the former operation wavelength used before adjustment adjustment direction, before target wavelength is compared to adjustment
The adjustment amount of the former operation wavelength used.
OLT can also set wavelength adjustment tolerance thresholding duration in this method, specifically, optical line terminal is to optical-fiber network list
Member sends the former operation wavelength of adjustment to the message of target wavelength, and sets the value of wavelength adjustment tolerance thresholding duration not less than following
The sum of three values：The wavelength switching of the optical network unit twice of duration, during the single physical layer synchronization of the optical network unit
Long, the optical network unit completes the handling duration needed for adjustment result feedback.（It can specifically include described in ONU from OLT receptions
The duration of message, build the duration that the feedback message is sent to the duration of the OLT feedback messages sent and to OLT）.On
The mode of setting is stated in order to ensure that OLT can receive the adjustment result of ONU feedbacks.
The wavelength switching duration refers to that operation wavelength in transmitter is adjusted to allow by the ONU from the minimum value of permission
Maximum, or from the maximum of permission be adjusted to allow minimum value duration, or from former operation wavelength adjust
To the single duration of target wavelength；The minimum value or maximum of the permission can be that OLT is allocated to ONU, can also ONU roots
Set according to certain parameter.The single physical layer synchronization duration refers to that the ONU completes the physics with the optical line terminal
The synchronous required duration of layer.
After the OLT sends the message to optical network unit, adjusted in the wavelength in tolerance thresholding duration and suppress institute
State the ONU and OLT and disconnect caused alarm；Adjusted in the wavelength in tolerance thresholding duration in the passage of former operation wavelength
With in the passage of target wavelength the uplink transmission resource information for receiving optical network unit feedback instruction is sent to institute ONU.
Using the OLT in the corresponding system of the above method include wavelength adjustment control module, adjustment result receiving module, on
Row transfer resource sending module, wavelength adjustment tolerance thresholding duration setup module.
The wavelength adjusts control module, and the wavelength for sending adjustment former operation wavelength to target wavelength to ONU adjusts
It is required that.
The adjustment result receiving module, for receiving the adjustment of the ONU feedbacks on the passage of the target wavelength
Successfully instruction, or the instruction for adjusting failure that the ONU is fed back is received on the passage of the former operation wavelength.
Wherein, the former operation wavelength refers to that the ONU carries out wavelength used in wavelength adjustment before, including upgoing wave
Long and downstream wavelength;The target wavelength refers to that the ONU successfully carries out the wavelength that should be used after wavelength adjustment, including uplink
Wavelength and downstream wavelength.
The uplink transmission resource sending module, in the passage of former operation wavelength and the passage of target wavelength to institute
State optical network unit and send the uplink transmission resource information for being used for receiving optical network unit feedback instruction.
The message refers to type of message for wavelength adjustment requirement and carries the physical layer operations management of target wavelength information
Safeguard message, or optical network unit management control interface message, or operation management maintainance message；The target wavelength information is at least
Including one of following parameters：The wavelength absolute value of target wavelength, the wavelength numbering of target wavelength, before target wavelength is compared to adjustment
The adjustment direction of the former operation wavelength used, adjustment amount of the target wavelength compared to the former operation wavelength used before adjustment.
The wavelength adjustment tolerance thresholding duration setup module, the value for setting wavelength adjustment tolerance thresholding duration be not small
In the sum of following three values：Twice of the wavelength switching duration of the optical network unit, the single physical layer of the optical network unit
Synchronous duration, the optical network unit complete the handling duration needed for adjustment result feedback.（It can specifically be connect including ONU from OLT
Receive the duration of the message, build to the OLT feedback messages sent duration and to OLT send the feedback message when
It is long）.The wavelength switching duration refers to that operation wavelength in transmitter is adjusted to allow most by the ONU from the minimum value of permission
Big value, or the duration for the minimum value for being adjusted to allow from the maximum of permission, or it is adjusted to mesh from former operation wavelength
Mark the single duration of wavelength；The minimum value or maximum of the permission can be that OLT is allocated to ONU, can also ONU according to one
Determine parameter setting.It is same with the physical layer of the optical line terminal that the single physical layer synchronization duration refers to that the ONU is completed
Duration needed for step.
The wavelength adjusts control module, is additionally operable to after sending the message to the ONU, adjusts and tolerate in the wavelength
Suppress the optical network unit in thresholding duration and disconnect caused alarm with the OLT.
The wavelength adjusts control module, is additionally operable to after sending the message to ONU, and tolerance thresholding is adjusted in the wavelength
Sent in duration in the passage of former operation wavelength and the passage of target wavelength to the optical network unit and be used to receive optical-fiber network
The uplink transmission resource information of unit feedback instruction.
Using the ONU in the corresponding system of the above method include wavelength adjustment processing module, switching result feedback module, on
Row transfer resource receiving module.
The wavelength adjusts processing module, the message of the former operation wavelength of the adjustment for receiving OLT transmissions to target wavelength
Afterwards, the former operation wavelength is adjusted to the target wavelength.
It is described adjustment result feedback module, for the wavelength adjustment processing module adjust successfully after, in the target
Successfully indicated to the optical line terminal feedback adjustment in the passage of wavelength；Or in wavelength adjustment processing module adjustment
After failure, to the instruction of optical line terminal feedback adjustment failure in the passage of the former operation wavelength.
The uplink transmission resource receiving module, for the wavelength adjustment processing module adjust successfully after, in target
Uplink transmission resource information is received on the passage of wavelength, or after wavelength adjustment processing module adjustment failure, in former work
Make to receive uplink transmission resource information on the passage of wavelength.The adjustment result feedback module, at the wavelength adjustment
After reason module adjusts successfully, according to the uplink transmission resource information feedback successfully instruction in the target wavelength passage；Or
It is anti-according to the uplink transmission resource information in the former operation wavelength passage after wavelength adjustment processing module adjustment failure
Present the instruction of failure.
This programme is described in detail below by embodiment.
Parameter setting is as follows：
PON system supports that operation wavelength is multiple to that can have, such as four operation wavelengths are to the λ including uplinku1, λu2,
λu3, λu4, and the λ of downlinkd1, λd2, λd3, λd4。
The wavelength switching times of ONU are set to t1.
The Single wavelength physical layer synchronization time of ONU is set to t2.
The handling duration that ONU completes needed for adjustment result feedback is set to t3.
The regulating power of ONU registration when with OLT ditches by, or OLT pass through ODN deployment precognition.
The method that wavelength adjustment is carried out in the present embodiment comprises the following steps 1 to step 5：
Step 1, before wavelength adjustment, OLT and ONU1 pass through uplink λu1With downlink λd1Operation wavelength in communicate.
Step 2, OLT passes through management passage（Such as the PLOAM of GPON systems, OMCI；Or the OAM message of EPON system
Etc., or be directly the OAM message of Ethernet）In downlink λd1Operation wavelength in ONU1 send message, it is desirable to ONU1 tune
Its whole wavelength is to λu2And λd2。
Wherein the type of message of this message is wavelength adjustment requirement（Wavelength Adjust Request）, this message
Form have diversified forms, using XG-PON1 PLOAM message formats as shown in for example following table 1-3, other OMCI message, with
OAM message netted very much etc. is form difference, and substantive implication is identical, and the type of message in corresponding message is wavelength adjustment requirement
（Wavelength Adjust Request）.
Table 1：Directly indicate wavelength absolute value
| Octet | Content |
| 1-2 | ONU is identified（ONU1） |
| 3 | Type of message（Wavelength Adjust Request） |
| 4 | Sequence number |
| 5~x | Launch wavelength absolute value after ONU adjustment |
| x+1~y | Reception wavelength absolute value after ONU adjustment |
| y+1~40 | Reserved bit（Or mend 0） |
| 41-48 | Message integrity check |
Table 2：Instruction wavelength numbering indirectly
| Octet | Content |
| 1-2 | ONU is identified（ONU1） |
| 3 | Type of message（Wavelength Adjust Request） |
| 4 | Sequence number |
| 5~x | Launch wavelength numbering after ONU adjustment |
| x+1~y | Reception wavelength numbering after ONU adjustment |
| y+1~40 | Reserved bit（Or mend 0） |
| 41-48 | Message integrity check |
Table 3：Instruction adjustment direction and adjustment amount indirectly
| Octet | Content |
| 1-2 | ONU is identified（ONU1） |
| 3 | Type of message（Wavelength Adjust Request） |
| 4 | Sequence number |
| 5~x | ONU launch wavelengths relative to currently operation wavelength adjustment direction and adjustment amount |
| x+1~y | ONU received waves length relative to currently operation wavelength adjustment direction and adjustment amount |
| y+1~40 | Reserved bit（Or mend 0） |
| 41-48 | Message integrity check |
Step 3, OLT sets wavelength to adjust the value of tolerance thresholding duration not less than the sum of following three values：Twice of t1, t2,
t3.OLT suppression ONU1 disconnect caused alarm because of carrying out wavelength tune long with OLT（The duration of suppression could be provided as cutting
Change tolerance thresholding duration）And pass through λd1, λd2Two channel allocations are used for the uplink money that ONU1 is adjusted result feedback
Source information（Such as uplink transmission time piece）.
The distribution of this uplink transmission resource needs to show difference according to the difference of PON system and the difference of management passage
Mode, such as PLOAM passages, the instruction of OLT distribution ONU1 uplink PLOAM and uplink transmission resource, if OMCI
Passage, the uplink transmission resource corresponding to OLT distribution ONU1 uplink OMCI message, specifically may be referred to specific embodiment.
Step 4, ONU1 is in downlink λd1Operation wavelength in receive wavelength adjustment requirement transmitted by OLT after, according to finger
The target wavelength shown carries out wavelength adjustment, and switching result is notified to OLT, the type of message of feedback message to adjust for wavelength by ONU1
Response（Wavelength Adjust Response）.
If the wavelength of ONU1 adjusts successfully, ONU1 is in λd2Physical layer synchronization is carried out on wavelength channel (time is set to t2)
Afterwards, it is possible in new operation wavelength λu2And λd2Carry out data sending and reception.ONU1 can utilize OLT in downlink at this time
Wavelength Xd2The management passage uplink transmission resource distributed on passage sends wavelength and is adjusted to the results messages of work(to OLT.
One is as shown in table 4 in a manner of exemplified by G-PON1 PLOAM message formats：
Table 4：
| Octet | Content |
| 1-2 | ONU is identified（ONU1） |
| 3 | Type of message（Wavelength Adjust Response） |
| 4 | Sequence number |
| 5 | The result feedback of wavelength adjustment：Success |
| 6 | Reason：Success can be ignored, and reason is then inserted in failure；（It is optional） |
| 7~x | Launch wavelength absolute value current ONU（It is optional） |
| x+1~y | Reception wavelength absolute value current ONU（It is optional） |
| y+1~40 | Reserved bit（Or mend 0） |
| 41-48 | Message integrity check |
Two is as shown in table 5 in a manner of exemplified by G-PON1PLOAM message formats：
Table 5：
| Octet | Content |
| 1-2 | ONU is identified（ONU1） |
| 3 | Type of message（Wavelength Adjust Response） |
| 4 | Sequence number |
| 5 | The result feedback of wavelength adjustment：Success |
| 6 | Reason：Success can be ignored, and reason is then inserted in failure；（It is optional） |
| 7~x | Launch wavelength numbering current ONU（It is optional） |
| x+1~y | Reception wavelength numbering current ONU（It is optional） |
| y+1~40 | Reserved bit（Or mend 0） |
| 41-48 | Message integrity check |
If the wavelength adjustment failure of ONU1, ONU1 return to original wavelength channel uplink λu1With downlink λd1Recover with OLT
Communication（Or return to wavelength channel and the OLT recovery communications of reservation）.ONU1 is in λd1On wavelength channel carry out physical layer synchronization it
Afterwards, it is possible in λu1And λd1Carry out data sending and reception.ONU1 can utilize OLT in downstream wavelength λ at this timed1Institute on passage
The management passage uplink transmission time piece of distribution, send wavelength adjustment failure results messages to OLT, the message format used with
Table 4 or table 5 are identical, but the content for the wavelength adjustment result one fed back is failure.
Step 5, OLT is in λu2After the successful confirmation for receiving ONU1, cancel the suppression operation, stop at former downstream wavelength and lead to
The operation of corresponding uplink transmission resource information is sent in road and target downlink wavelength channel, OLT and ONU1 work in λu2And λd2。
Alternatively, OLT is in λu1After the adjustment failure for receiving ONU1, cancel the suppression operation, stop at former downstream wavelength passage
With the operation that corresponding uplink transmission resource information is sent in target downlink wavelength channel, OLT and ONU1 work in λu1And λd1。
OLT does not receive the switching result of ONU1 feedbacks after wavelength adjusts tolerance thresholding duration time-out, then solution registration should
ONU1。
Specific embodiment one：
Adjustment successful examples applied to PLOAM passages.
The situation that system works before wavelength adjustment：
Upstream wavelength U1：1262.5nm；U2：1267.5nm；U3：1272.5nm；U4：1277.5nm.
Downstream wavelength D1:1575.75nm；D2:1577.25nm；D3:1578.25nm；D4：1580.25nm.
A length of 4000us when ONU wavelength switches（Referred to as t1）, whens ONU single physical layer synchronizations a length of 500us (being known as t2),
The handling duration that ONU completes needed for adjustment result feedback is 4000us（Referred to as t3）.
ONU1 is worked normally in wavelength pair in OLT successful registrations with OLT（D3,U3）.
OLT TC layer protocols basis is XG-PON1 systems.
OLT wavelength adjustment tolerance threshold value is arranged to 5 seconds, meets the requirement not less than the sum of following three values：Twice of t1,
T2, t3.
As shown in Fig. 2, this specific embodiment realizes that process comprises the following steps 101 to step 107：
Step 101：OLT issues PLOAM message, and type of message is wavelength adjustment requirement, and instruction ONU1 is adjusted to wavelength pair
（D2,U2）In.
Message format is as shown in table 6：
Table 6：
| Octet | Content |
| 1-2 | ONU is identified（ONU1） |
| 3 | Type of message（Wavelength Adjust Request） |
| 4 | 01 |
| 5~8 | 1577.25nm（D2） |
| 9~12 | 1267.5nm （U2） |
| 13~40 | Mend 0 |
| 41-48 | Message integrity check |
Step 102：It is the timer of 5 seconds that OLT, which starts wavelength adjustment tolerance thresholding, suppress ONU1 before its time-out because
Caused alarm when adjusting wavelength and being disconnected with OLT, and the transmission bandwidth of repetition period is distributed on downstream wavelength D2 and D3
Instruction：Parameter is 100 between being indicated in the instruction of this bandwidth allocation at the beginning of uplink transmission time piece, a length of 32 during mandate.
Step 103：ONU1 receives the PLOAM message that OLT in step 101 is issued on D3 wavelength channels, and successfully according to
Require to adjust its operation wavelength in order to D2, U2, a length of t1 during consuming.
Step 104：ONU1 successfully carries out physical layer synchronization on the passage of downstream wavelength D2, a length of t2 during consuming.
Step 105：ONU1 receives the bandwidth allocation instruction that OLT is sent in a step 102 on the passage of downstream wavelength D2.
Step 106：ONU1 is instructed according to received bandwidth allocation in step 105, and work(is adjusted to OLT feedback wavelength
PLOAM response messages.
Message format is as shown in table 7：
Table 7：
| Octet | Content |
| 1-2 | ONU is identified（ONU1） |
| 3 | Type of message（Wavelength Adjust Response） |
| 4 | 01 |
| 5 | The result feedback of wavelength adjustment：Success |
| 6 | Reason：Ignore（It is optional） |
| 7~10 | 1577.25nm（D2）It is optional |
| 11~14 | 1267.5nm（U2）It is optional |
| 15~40 | Mend 0 |
| 41-48 | Message integrity check |
Step 107：OLT receives what ONU1 was sent in step 106 before timer expiry on U2 wavelength channels
PLOAM message, type of message are wavelength adjustment response（Wavelength_adjust_response）, the announcement in cancellation step 2
Bandwidth allocation instruction that is alert to suppress, and being issued in D2 and D3 downstream wavelength passages, OLT and ONU1 exist（D2,U2）Wavelength pair
Upper carry out normal communication.
Specific embodiment two
Adjustment failure example applied to OMC passages.
Systematic parameter is identical with specific embodiment one.
As shown in figure 3, this specific embodiment realizes that process comprises the following steps 201 to step 207：
Step 201：OLT issues OMCI message, and type of message is wavelength adjustment requirement, and instruction ONU1 is adjusted to wavelength pair
（D2,U2）In.
Step 202：It is the timer of 5 seconds that OLT, which starts wavelength adjustment tolerance thresholding, suppress ONU1 before its time-out because
Caused alarm when adjusting wavelength and being disconnected with OLT, and the transmission bandwidth of repetition period is distributed on downstream wavelength D2 and D3
Instruction, parameter is 100 between being indicated in the instruction of this bandwidth allocation at the beginning of uplink transmission time piece, a length of 100 during mandate.
Step 203：ONU1 receives the OMCI message that OLT in step 201 is issued on D3 wavelength channels, and according in order
It is required that adjusting its operation wavelength arrives D2, U2, adjustment comes back to original wavelength to D3 after failing, U3, a length of 2*t1 during consuming.
Step 204：ONU1 successfully carries out physical layer synchronization on the passage of downstream wavelength D3, a length of t2 during consuming.
Step 205：ONU1 receives the bandwidth allocation instruction that OLT is sent in step 202 on the passage of downstream wavelength D3.
Step 206：ONU1 is instructed according to received bandwidth allocation in step 205, and OMCI is sent in U3 upstream wavelengths passage
Message, the instruction of adjustment failure, and operation wavelength D3, U3 currently in use are carried in this message.
Step 207：OLT receives the finger that ONU1 is sent in step 206 before timer expiry on U3 wavelength channels
The OMCI message of oscillography length adjustment failure, the alarm in cancellation step 202 suppress, and under D2 and D3 downstream wavelengths passage institute
The bandwidth allocation instruction of hair.OLT and ONU1 exist（D3,U3）Wavelength carries out follow-up communication.
Specific embodiment three：
Overtime example applied to OMCI passages.
Systematic parameter is identical with specific embodiment one.
This specific embodiment realizes that process comprises the following steps 301 to step 304：
Step 301：OLT issues OMCI message, and type of message is wavelength adjustment requirement, and instruction ONU1 is adjusted to wavelength pair
（D2,U2）In.
Step 302：It is the timer of 5 seconds that OLT, which starts wavelength adjustment tolerance thresholding, suppress ONU1 before its time-out because
Adjustment wavelength and caused alarm when being disconnected with OLT, and on downstream wavelength D2 and D3 the repetition period the following bandwidth of transmission
Distribution instruction：Parameter is 100 between being indicated in the instruction of this bandwidth allocation at the beginning of uplink transmission time piece, a length of 100 during mandate.
Step 303：ONU1 receives the OMCI message that OLT in step 301 is issued on D3 wavelength channels, and according in order
It is required that adjusting its operation wavelength to D2, U2, former wavelength is come back to after failure to D3, U3, but expend duration and already exceed 5 seconds.
Step 304：OLT is after timer expiry, solution registration ONU1, and is sent out on D2 and D3 down going channels in certain time
Send the PLOAM message of solution registration ONU1（deavtive_ONU_ID）.
The rationalization realization that this programme can carry out wavelength adjustment for ONU provides solution, improves passive optical network system
The process performance of system.
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the application can phase
Mutually any combination.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Various corresponding changes and deformation, but these corresponding changes and deformation can be made according to the present invention by knowing those skilled in the art
The protection domain of appended claims of the invention should all be belonged to.
One of ordinary skill in the art will appreciate that all or part of step in the above method can be instructed by program
Related hardware is completed, and described program can be stored in computer-readable recording medium, such as read-only storage, disk or CD
Deng.Alternatively, all or part of step of above-described embodiment can also be realized using one or more integrated circuits.Accordingly
Ground, each module/unit in above-described embodiment can be realized in the form of hardware, can also use the shape of software function module
Formula is realized.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (11)
1. a kind of method for carrying out wavelength adjustment, applied in passive optical network, wherein,
Optical line terminal sends the former operation wavelength of adjustment to optical network unit will to the message of target wavelength, the optical network unit
The original operation wavelength is adjusted to the target wavelength；
After adjusting successfully, the optical network unit in the passage of the target wavelength to the optical line terminal feedback adjustment into
The instruction of work(；Or after adjustment failure, the optical network unit is whole to the optical link in the passage of the former operation wavelength
Hold the instruction of feedback adjustment failure.
2. the method as described in claim 1, it is characterised in that
The original operation wavelength refers to that the optical network unit carries out wavelength used in wavelength adjustment before, including upstream wavelength
And downstream wavelength；
The target wavelength refers to that the optical network unit successfully carries out the wavelength that should be used after wavelength adjustment, including upgoing wave
Long and downstream wavelength.
3. the method as described in claim 1, it is characterised in that
The optical line terminal sends uplink transmission resource information in the passage of the target wavelength, and in the former operating wave
Uplink transmission resource information is sent in long passage；
After the optical network unit adjusts successfully, according to the uplink transmission resource information sent in the passage of the target wavelength
Feedback successfully instruction；Or after the optical network unit adjustment failure, using sent in the passage of the former operation wavelength
Uplink transmission resource information feeding back unsuccessful instruction.
4. the method as described in claim 1, it is characterised in that
The message that the optical line terminal sends adjustment former operation wavelength to target wavelength to the optical network unit specifically refers to：
The optical line terminal sends type of message as wavelength adjustment requirement to the optical network unit and carries target wavelength information
Physical layer operations management service message, or optical network unit management control interface message, or operation management maintainance message；
The target wavelength information includes at least one of following parameters：The wavelength absolute value of target wavelength, the wavelength of target wavelength
Numbering, target wavelength is compared to the adjustment direction of the former operation wavelength used before adjustment, and target wavelength before adjustment compared to using
Former operation wavelength adjustment amount.
5. a kind of optical line terminal, wherein,
The optical line terminal includes wavelength adjustment control module and adjustment result receiving module；
The wavelength adjusts control module, for sending the former operation wavelength of adjustment to the message of target wavelength to optical network unit；
The adjustment result receiving module, for receiving the tune of the optical network unit feedback on the passage of the target wavelength
Whole successfully instruction, or the finger for adjusting failure that the optical network unit is fed back is received on the passage of the former operation wavelength
Show.
6. optical line terminal as claimed in claim 5, it is characterised in that
The original operation wavelength refers to that the optical network unit carries out wavelength used in wavelength adjustment before, including upstream wavelength
And downstream wavelength；
The target wavelength refers to that the optical network unit successfully carries out the wavelength that should be used after wavelength adjustment, including upgoing wave
Long and downstream wavelength.
7. optical line terminal as claimed in claim 5, it is characterised in that
The optical line terminal further includes uplink transmission resource sending module；
Uplink transmission resource sending module, in the passage of former operation wavelength and the passage of target wavelength to the optical-fiber network
Unit sends the uplink transmission resource information for being used for receiving optical network unit feedback instruction.
8. optical line terminal as claimed in claim 5, it is characterised in that
The message refers to type of message for wavelength adjustment requirement and carries the physical layer operations management service of target wavelength information
Message, or optical network unit management control interface message, or operation management maintainance message；
The target wavelength information includes at least one of following parameters：The wavelength absolute value of target wavelength, the wavelength of target wavelength
Numbering, target wavelength is compared to the adjustment direction of the former operation wavelength used before adjustment, and target wavelength before adjustment compared to using
Former operation wavelength adjustment amount.
9. a kind of optical network unit, wherein, the optical network unit includes wavelength adjustment processing module and switching result feedback mould
Block；
The wavelength adjusts processing module, former operation wavelength the disappearing to target wavelength of the adjustment for receiving optical line terminal transmission
Breath, the former operation wavelength is adjusted to the target wavelength；
It is described adjustment result feedback module, for the wavelength adjustment processing module adjust successfully after, in the target wavelength
Passage in successfully indicated to the optical line terminal feedback adjustment；Or in wavelength adjustment processing module adjustment failure
Afterwards, to the instruction of optical line terminal feedback adjustment failure in the passage of the former operation wavelength.
10. optical network unit as claimed in claim 9, it is characterised in that
The optical network unit further includes uplink transmission resource receiving module；
The uplink transmission resource receiving module, for the wavelength adjustment processing module adjust successfully after, in target wavelength
Passage on receive uplink transmission resource information, or the wavelength adjustment processing module adjustment failure after, in former operating wave
Uplink transmission resource information is received on long passage.
11. optical network unit as claimed in claim 10, it is characterised in that
It is described adjustment result feedback module, for the wavelength adjustment processing module adjust successfully after, according to the target ripple
Uplink transmission resource information feedback successfully instruction in long-channel；Or in wavelength adjustment processing module adjustment failure
Afterwards, according to the instruction of the uplink transmission resource information feeding back unsuccessful in the former operation wavelength passage.
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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 |
| WO2015172279A1 (en) * | 2014-05-12 | 2015-11-19 | 华为技术有限公司 | Wavelength switching method, device and system |
| WO2015184604A1 (en) * | 2014-06-04 | 2015-12-10 | 华为技术有限公司 | Wavelength switching method, device and system |
| CN105409142A (en) * | 2014-06-09 | 2016-03-16 | 华为技术有限公司 | Method and apparatus for wavelength initialization and device registration in passive optical network |
| CN105830369B (en) * | 2014-07-29 | 2018-09-21 | 华为技术有限公司 | Ethernet passive optical network devices in system is registered and the method and apparatus of wavelength switching |
| WO2016023180A1 (en) * | 2014-08-13 | 2016-02-18 | 华为技术有限公司 | Communication method, device, and system for passive optical network |
| CN105577265B (en) * | 2014-10-17 | 2020-04-24 | 中兴通讯股份有限公司 | Calibration method of uplink wavelength channel of passive optical network system and optical network unit |
| KR102035629B1 (en) * | 2014-12-30 | 2019-10-23 | 후아웨이 테크놀러지 컴퍼니 리미티드 | Communication methods, devices, and systems applied to multi-wavelength passive optical networks |
| CN106162385B (en) * | 2015-04-20 | 2021-11-09 | 中兴通讯股份有限公司 | Method and device for controlling running state of channel terminal |
| EP3267632B1 (en) * | 2015-04-22 | 2019-11-27 | Nippon Telegraph and Telephone Corporation | Station-side device and wavelength changeover monitoring method |
| CN106911418B (en) * | 2015-12-23 | 2019-03-19 | 中国电信股份有限公司 | For the method, apparatus of the quick rollback of wavelength tuning, ONU and passive optical network |
| CN107342973B (en) * | 2016-05-03 | 2021-07-20 | 中兴通讯股份有限公司 | Passive optical network registration method and device and passive optical network system |
| CN107566076B (en) * | 2016-06-30 | 2020-10-16 | 中兴通讯股份有限公司 | Wavelength self-adaptive tuning method and device for wavelength division network element |
| CN116419101A (en) * | 2021-12-30 | 2023-07-11 | 中兴通讯股份有限公司 | Energy-saving configuration method, device and storage medium of passive optical network |
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