CN103391486A - Method for wave length adjustment, optical line terminal and optical network unit - Google Patents
Method for wave length adjustment, optical line terminal and optical network unit Download PDFInfo
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Abstract
The invention provides a method for wave length adjustment, an optical line terminal and an optical network unit and system. The method for wave length adjustment is applied to a passive optical network. The optical line terminal sends a message adjusting an original work wave length to a target wave length to the optical network unit, and the optical network unit adjusts the original work wave length towards the target wave length; after the adjustment is successful, the optical network unit feeds back an instruction of successful adjustment to the optical line terminal in a channel of the target wave length; otherwise, after the adjustment fails, the optical network unit feeds back an instruction of failure adjustment to the optical line terminal in a channel of the original work wave length. The method for wave length adjustment can provide a solving scheme for reasonable achievement of wave length adjustment of the optical network unit and improve processing performance of the passive optical network system.
Description
Technical field
The present invention relates to passive optical network in the communications field, relate in particular to a kind of method and optical line terminal and optical network unit that wavelength is adjusted that carry out.
Background technology
Standardized Ethernet passive optical network (Ethernet Passive Optical Network is called for short EPON) and gigabit passive optical network (Gigabit Passive Optical Network is called for short GPON) are all by the extensive use of institute of operator.no matter which kind of difference the technology mechanism on upper strata exists, EPON and GPON and its follow-up 10GEPON and 10GGPON belong to EPON (the Time-Division Multiplexing Passive Optical Network of time division multiplexing, abbreviation TDM-PON) technical system: optical line terminal (Optical Line Terminal, be called for short OLT) and all optical network unit (Optical Network Unit, be called for short ONU) communicate by a pair of up-downgoing wavelength, wherein ONU carries out transfer of data according to the different time sections of OLT scheduling in up wavelength.
Industry is being discussed the technique direction of next-generation passive optical network (NG-PON2) now, wherein emerge the multiple technologies system, comprise wavelength division multiplexing PON(Wavelength Division Multiplexing PON, be called for short WDM-PON), time-division wavelength division multiplexing PON(Time-Wavelength Division Multiplexing PON, be called for short TWDM-PON), OFDM PON(Orthogonal frequency-division multiplexing, be called for short OFDM-PON), and the PON system type of aforementioned mechanism mixing etc.But no matter being any technical system, is all to be extended to many operation wavelength to be carried out work on the basis of a pair of operation wavelength.
WDM-PON system for example, in this novel passive optical network system based on the transmission of multi-wavelength single fiber, each terminal use takies separately a pair of up-downgoing wavelength channel, transmit in same trunk fiber by the mode of wavelength division multiplexing at a plurality of wavelength channels on up or down direction, be characterized in that each terminal use exclusively enjoys a wavelength bandwidth resource.
TWDM-PON system for example, its principal character is that a plurality of TDM-PON systems are stacked up by many modes to operation wavelength (general 4-8 to), OLT is built-in with many to the operation wavelength processing module, ONU, for keeping colourless, can be operated in by the mode of adjustable emission and/or adjustable reception on a pair of operation wavelength in OLT.
No matter any system of above-mentioned distance, all brought a problem, is exactly how the operation wavelength of ONU is set, adjusted and manages.The simplest a kind of mode is exactly that all ONU adopt fixing operation wavelength, but this can bring great inventory cost pressure to operator.It is exactly the problem that must solve in following PON System Development that thereby the ONU operation wavelength can be regulated.
Industry has proposed the mode of some adjusting wavelengths, such as optical line terminal sends wavelength adjustment order to optical network unit, but concrete methods of realizing is also all the scheme of exemplary in nature, do not relate to some particular problems in the actual wavelength adjusting, therefore in the available system of reality, need to propose corresponding solution.
Summary 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 optical network unit and system that wavelength is adjusted of carrying out, and the rationalization of carrying out the wavelength adjustment for optical network unit realizes providing solution.
In order to solve the problems of the technologies described above, the invention provides a kind of method that wavelength is adjusted of carrying out, be applied in EPON, wherein, optical line terminal send to be adjusted the message of former operation wavelength to target wavelength to optical network unit, described optical network unit with described former operation wavelength to described target wavelength adjustment; After adjusting successfully, described optical network unit in the passage of described target wavelength to the indication of described optical line terminal feedback adjusting success; After perhaps adjusting unsuccessfully, described optical network unit in the passage of described former operation wavelength to the indication of described optical line terminal feedback adjusting failure.
Further, said method can also have following characteristics:
Described former operation wavelength refers to that described optical network unit carries out the wavelength that uses before the wavelength adjustment, comprises up wavelength and downstream wavelength;
Described target wavelength refers to that described optical network unit successfully carries out the wavelength that should use after the wavelength adjustment, comprises up wavelength and downstream wavelength.
Further, said method can also have following characteristics:
Described optical line terminal sends uplink transmission resource information in the passage of described target wavelength, and sends uplink transmission resource information in the passage of described former operation wavelength;
After described optical network unit adjustment success, the successful indication of uplink transmission resource information feedback that sends in the passage according to described target wavelength; Perhaps after described optical network unit adjustment failure, use the indication of the uplink transmission resource information feeding back unsuccessful that sends in the passage of described former operation wavelength.
Further, said method can also have following characteristics:
The message of described optical line terminal to the former operation wavelength of described optical network unit transmission adjustment to target wavelength specifically refers to: it is wavelength adjustment requirement and the physical layer operations management maintenance message of carrying target wavelength information that described optical line terminal sends type of message to described optical network unit, or optical network unit management control interface message, or operation management maintain message;
Described target wavelength information comprises one of following parameters at least: the wavelength absolute value of target wavelength, the wavelength numbering of target wavelength, target wavelength is than the adjustment direction of adjusting the front former operation wavelength of using, and target wavelength is than the adjustment amount of adjusting the front former operation wavelength of using.
In order to solve the problems of the technologies described above, the present invention also provides a kind of method that operation wavelength is adjusted of carrying out, be applied in EPON, wherein, optical line terminal sends and adjusts the message of former operation wavelength to target wavelength to optical network unit, and the value that wavelength adjustment tolerance thresholding duration is set is not less than following three value sums: the twice of the wavelength switching duration of described optical network unit, the single physical layer synchronization duration of described optical network unit, described optical network unit are completed and are adjusted the required handling duration of result feedback.
Further, said method can also have following characteristics:
Described wavelength switching duration refers to that described optical network unit adjusts to operation wavelength in transmitter the maximum of permission from the minimum value that allows, or from the maximum that allows, adjust to the duration of the minimum value of permission, or adjust to the single duration of target wavelength from former operation wavelength;
Described single physical layer synchronization duration refers to that described optical network unit completes the duration required with the physical layer synchronization of described optical line terminal.
Further, said method can also have following characteristics:
After described optical line terminal sends described message to optical network unit, suppress the alarm that described optical network unit and the disconnection of described optical line terminal produce in described wavelength adjustment tolerance thresholding duration.
Further, said method can also have following characteristics:
After described optical line terminal sends described message to optical network unit, send to described optical network unit the uplink transmission resource information that is used for receiving the indication of optical network unit feedback in the passage of the passage of former operation wavelength and target wavelength in described wavelength adjustment tolerance thresholding duration.
In order to solve the problems of the technologies described above, the present invention also provides a kind of optical line terminal, and wherein, described optical line terminal comprises wavelength adjustment control module and adjusts receiver module as a result;
Described wavelength is adjusted control module, is used for sending and adjusting the message of former operation wavelength to target wavelength to optical network unit;
Described adjustment is receiver module as a result, is used for the indication of the adjustment success of the described optical network unit feedback of reception on the passage of described target wavelength, perhaps receives the indication of the adjustment failure of described optical network unit feedback on the passage of described former operation wavelength.
Further, above-mentioned optical line terminal can also have following characteristics:
Described former operation wavelength refers to that described optical network unit carries out the wavelength that uses before the wavelength adjustment, comprises up wavelength and downstream wavelength;
Described target wavelength refers to that described optical network unit successfully carries out the wavelength that should use after the wavelength adjustment, comprises up wavelength and downstream wavelength.
Further, above-mentioned optical line terminal can also have following characteristics:
Described optical line terminal also comprises the uplink transmission resource sending module;
The uplink transmission resource sending module, be used for sending at the passage of former operation wavelength and the passage of target wavelength the uplink transmission resource information that is used for receiving the indication of optical network unit feedback to described optical network unit.
Further, above-mentioned optical line terminal can also have following characteristics:
Described message refers to that type of message is wavelength adjustment requirement and the physical layer operations management maintenance message of carrying target wavelength information, or optical network unit management control interface message, or operation management maintain message;
Described target wavelength information comprises one of following parameters at least: the wavelength absolute value of target wavelength, the wavelength numbering of target wavelength, target wavelength is than the adjustment direction of adjusting the front former operation wavelength of using, and target wavelength is than the adjustment amount of adjusting the front former operation wavelength of using.
In order to solve the problems of the technologies described above, the present invention also provides a kind of optical line terminal, and wherein, described optical line terminal comprises that wavelength is adjusted control module and wavelength adjustment tolerance thresholding duration arranges module;
Described wavelength is adjusted control module, is used for sending and adjusting the message of former operation wavelength to target wavelength to optical network unit;
Described wavelength adjustment tolerance thresholding duration arranges module, be used for that the wavelength adjustment is set and tolerate that the value of thresholding duration is not less than following three value sums: the twice of the wavelength switching duration of described optical network unit, the single physical layer synchronization duration of described optical network unit, described optical network unit are completed and are adjusted the required handling duration of result feedback.
Further, above-mentioned optical line terminal can also have following characteristics:
Described wavelength switching duration refers to that described optical network unit adjusts to operation wavelength in transmitter the maximum of permission from the minimum value that allows, or from the maximum that allows, adjust to the duration of the minimum value of permission, or adjust to the single duration of target wavelength from former operation wavelength;
Described single physical layer synchronization duration refers to that described optical network unit completes the duration required with the physical layer synchronization of described optical line terminal.
Further, above-mentioned optical line terminal can also have following characteristics:
Described wavelength is adjusted control module, and after also being used for sending described message to described optical network unit, the described optical network unit of inhibition and described optical line terminal disconnect the alarm that produces in described wavelength adjustment tolerance thresholding duration.
Further, above-mentioned optical line terminal can also have following characteristics:
Described wavelength is adjusted control module, after also being used for sending described message to optical network unit, send to described optical network unit the uplink transmission resource information that is used for receiving the indication of optical network unit feedback in the passage of the passage of former operation wavelength and target wavelength in described wavelength adjustment tolerance thresholding duration.
In order to solve the problems of the technologies described above, the present invention also provides a kind of optical network unit, and wherein, described optical network unit comprises wavelength adjustment processing module and switching result feedback module;
Described wavelength is adjusted processing module, is used for receiving the former operation wavelength of adjustment that optical line terminal the sends message to target wavelength, with described former operation wavelength to described target wavelength adjustment;
Described adjustment result feedback module, be used for after described wavelength is adjusted processing module adjustment success, in the passage of described target wavelength to the indication of described optical line terminal feedback adjusting success; Perhaps after described wavelength is adjusted processing module adjustment failure, in the passage of described former operation wavelength to the indication of described optical line terminal feedback adjusting failure.
Further, above-mentioned optical network unit can also have following characteristics:
Described optical network unit also comprises the uplink transmission resource receiver module;
Described uplink transmission resource receiver module, be used for after described wavelength is adjusted processing module adjustment success, receive uplink transmission resource information on the passage of target wavelength, perhaps after described wavelength is adjusted processing module adjustment failure, receive uplink transmission resource information on the passage of former operation wavelength.
Further, above-mentioned optical network unit can also have following characteristics:
Described adjustment result feedback module, be used for after described wavelength is adjusted processing module adjustment success, according to the successful indication of the feedback of the uplink transmission resource information in described target wavelength passage; Perhaps after described wavelength is adjusted processing module adjustment failure, according to the indication of the uplink transmission resource information feeding back unsuccessful in described former operation wavelength passage.
In order to solve the problems of the technologies described above, the present invention also provides a kind of passive optical network, comprises above-mentioned optical line terminal and above-mentioned optical network unit.
This programme can realize providing solution for the rationalization that optical network unit carries out the wavelength adjustment, improves the handling property of passive optical network.
Description of drawings
Fig. 1 is the schematic diagram that carries out the method for wavelength adjustment in embodiment;
Fig. 2 is the processing method schematic diagram in optical network unit adjustment success situation 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 for carrying out the wavelength adjustment that is applied in EPON comprises: OLT send to adjust the message of former operation wavelength to target wavelength to ONU, described ONU with described former operation wavelength to described target wavelength adjustment; After adjusting successfully, described ONU in the passage of described target wavelength to the indication of described optical line terminal feedback adjusting success; After perhaps adjusting unsuccessfully, described ONU in the passage of described former operation wavelength to the indication of described optical line terminal feedback adjusting failure.
Described former operation wavelength refers to that described ONU, carrying out the wavelength that uses before the wavelength adjustment, comprises up wavelength and downstream wavelength; Described target wavelength refers to that described ONU successfully carries out the wavelength that should use after the wavelength adjustment, comprises up wavelength and downstream wavelength.
Described OLT sends uplink transmission resource information in the passage of described target wavelength, and sends uplink transmission resource information in the passage of described former operation wavelength; After described ONU adjusts successfully, the successful indication of uplink transmission resource information feedback that sends in the passage according to described target wavelength; After perhaps described ONU adjusts unsuccessfully, use the indication of the uplink transmission resource information feeding back unsuccessful that sends in the passage of described former operation wavelength.
the message of OLT to ONU transmission adjustment operation wavelength to target wavelength specifically refers to: it is wavelength adjustment requirement (Wavelength adjust request) and the physical layer operations management maintenance message of carrying the information of described target wavelength (Physical Layer Operations Administration and Maintenance that OLT sends type of message to ONU, be called for short PLOAM) or optical network unit management control interface message (ONU Management and Control Interface, be called for short OMCI) or operation management maintain message (Operations Administration and Maintenance, be called for short OAM).Above-mentioned message can be PLOAM or the OMCI in the GPON system, or the OAM message in the EPON system, or the OAM message in Ethernet.The information of target wavelength comprises one of following parameters at least: the wavelength absolute value of target wavelength, the wavelength numbering of target wavelength, target wavelength is than the adjustment direction of adjusting the front former operation wavelength of using, and target wavelength is than the adjustment amount of adjusting the front former operation wavelength of using.
In this method, OLT can also arrange wavelength adjustment tolerance thresholding duration, concrete, optical line terminal sends and adjusts the message of former operation wavelength to target wavelength to optical network unit, and the value that wavelength adjustment tolerance thresholding duration is set is not less than following three value sums: the twice of the wavelength switching duration of described optical network unit, the single physical layer synchronization duration of described optical network unit, described optical network unit are completed and are adjusted the required handling duration of result feedback.(can comprise that specifically ONU receives the duration of described message, the duration that builds the feedback message that sends to OLT and the duration that sends described feedback message to OLT from OLT).The mode of above-mentioned setting can be received the adjustment result of ONU feedback in order to guarantee OLT.
Described wavelength switching duration refers to that described ONU adjusts to operation wavelength in transmitter the maximum of permission from the minimum value that allows, or from the maximum that allows, adjust to the duration of the minimum value of permission, or adjust to the single duration of target wavelength from former operation wavelength; The minimum value of described permission or maximum can be that OLT configures to ONU, also can ONU according to certain parameter, arrange.Described single physical layer synchronization duration refers to that described ONU completes the duration required with the physical layer synchronization of described optical line terminal.
After described OLT sends described message to optical network unit, suppress the alarm that described ONU and described OLT disconnection produce in described wavelength adjustment tolerance thresholding duration; Send to the ONU of institute the uplink transmission resource information that is used for receiving the indication of optical network unit feedback in the passage of the passage of former operation wavelength and target wavelength in described wavelength adjustment tolerance thresholding duration.
OLT in the corresponding system of application said method comprises that receiver module, uplink transmission resource sending module, wavelength adjustment tolerance thresholding duration arrange module as a result for wavelength adjustment control module, adjustment.
Described wavelength is adjusted control module, is used for sending and adjusting the wavelength adjustment requirement of former operation wavelength to target wavelength to ONU.
Described adjustment is receiver module as a result, is used for the indication of the adjustment success of the described ONU feedback of reception on the passage of described target wavelength, perhaps receives the indication of the adjustment failure of described ONU feedback on the passage of described former operation wavelength.
Wherein, described former operation wavelength refers to that described ONU carries out the wavelength that uses before the wavelength adjustment, comprises up wavelength and downstream wavelength; Described target wavelength refers to that described ONU successfully carries out the wavelength that should use after the wavelength adjustment, comprises up wavelength and downstream wavelength.
Described uplink transmission resource sending module, be used for sending at the passage of former operation wavelength and the passage of target wavelength the uplink transmission resource information that is used for receiving the indication of optical network unit feedback to described optical network unit.
Described message refers to that type of message is wavelength adjustment requirement and the physical layer operations management maintenance message of carrying target wavelength information, or optical network unit management control interface message, or operation management maintain message; Described target wavelength information comprises one of following parameters at least: the wavelength absolute value of target wavelength, the wavelength numbering of target wavelength, target wavelength is than the adjustment direction of adjusting the front former operation wavelength of using, and target wavelength is than the adjustment amount of adjusting the front former operation wavelength of using.
Described wavelength adjustment tolerance thresholding duration arranges module, be used for that the wavelength adjustment is set and tolerate that the value of thresholding duration is not less than following three value sums: the twice of the wavelength switching duration of described optical network unit, the single physical layer synchronization duration of described optical network unit, described optical network unit are completed and are adjusted the required handling duration of result feedback.(can comprise that specifically ONU receives the duration of described message, the duration that builds the feedback message that sends to OLT and the duration that sends described feedback message to OLT from OLT).Described wavelength switching duration refers to that described ONU adjusts to operation wavelength in transmitter the maximum of permission from the minimum value that allows, or from the maximum that allows, adjust to the duration of the minimum value of permission, or adjust to the single duration of target wavelength from former operation wavelength; The minimum value of described permission or maximum can be that OLT configures to ONU, also can ONU according to certain parameter, arrange.Described single physical layer synchronization duration refers to that described ONU completes the duration required with the physical layer synchronization of described optical line terminal.
Described wavelength is adjusted control module, and after also being used for sending described message to described ONU, the described optical network unit of inhibition and described OLT disconnect the alarm that produces in described wavelength adjustment tolerance thresholding duration.
Described wavelength is adjusted control module, after also being used for sending described message to ONU, send to described optical network unit the uplink transmission resource information that is used for receiving the indication of optical network unit feedback in the passage of the passage of former operation wavelength and target wavelength in described wavelength adjustment tolerance thresholding duration.
ONU in the corresponding system of application said method comprises wavelength adjustment processing module, switching result feedback module, uplink transmission resource receiver module.
Described wavelength is adjusted processing module, is used for receiving the former operation wavelength of adjustment that OLT sends after the message of target wavelength, with described former operation wavelength to described target wavelength adjustment.
Described adjustment result feedback module, be used for after described wavelength is adjusted processing module adjustment success, in the passage of described target wavelength to the indication of described optical line terminal feedback adjusting success; Perhaps after described wavelength is adjusted processing module adjustment failure, in the passage of described former operation wavelength to the indication of described optical line terminal feedback adjusting failure.
Described uplink transmission resource receiver module, be used for after described wavelength is adjusted processing module adjustment success, receive uplink transmission resource information on the passage of target wavelength, perhaps after described wavelength is adjusted processing module adjustment failure, receive uplink transmission resource information on the passage of former operation wavelength.Described adjustment result feedback module, be used for after described wavelength is adjusted processing module adjustment success, according to the successful indication of the feedback of the uplink transmission resource information in described target wavelength passage; Perhaps after described wavelength is adjusted processing module adjustment failure, according to the indication of the uplink transmission resource information feeding back unsuccessful in described former operation wavelength passage.
Describe this programme in detail below by embodiment.
Setting parameter is as follows:
PON system support performance wavelength is a plurality of to having, and for example four operation wavelengths are to comprising up λ
u1, λ
u2, λ
u3, λ
u4, and descending λ
d1, λ
d2, λ
d3, λ
d4.
The wavelength of ONU is made as t1 switching time.
Single wavelength physical layer synchronization time of ONU is made as t2.
ONU completes the required handling duration of adjustment result feedback and is made as t3.
The regulating power of ONU has passed through with the OLT ditch when registration, perhaps OLT disposes precognition by ODN.
The method of carrying out the wavelength adjustment in the present embodiment comprises the following steps 1 to step 5:
Step 1, before wavelength was adjusted, OLT and ONU1 were just by up λ
u1With descending λ
d1Operation wavelength in communicate by letter.
Step 2, OLT is by management channels (PLOAM of GPON system for example, OMCI; Perhaps OAM message of EPON system etc., be directly perhaps the OAM message of Ethernet) at descending λ
d1Operation wavelength in send message to ONU1, require ONU1 to adjust its wavelength to λ
u2And λ
d2.
Wherein the type of message of this message is that the wavelength adjustment requires (Wavelength Adjust Request), the form of this message has various ways, with XG-PON1 PLOAM message format for for example shown in following table 1-3, other OMCI message, OAM message of Ethernet etc. is all that form is different, the essence implication is identical, and the type of message in corresponding message is that the wavelength adjustment requires (Wavelength Adjust Request).
Table 1: directly indicate the wavelength absolute value
| Octet | Content |
| 1-2 | ONU identifies (ONU1) |
| 3 | Type of message (Wavelength Adjust Request) |
| 4 | Sequence number |
| 5~x | Emission wavelength absolute value after ONU adjusts |
| x+1~y | Reception wavelength absolute value after ONU adjusts |
| y+1~40 | Keep position (perhaps mending 0) |
| 41-48 | Message integrity check |
Table 2: indirectly indicate the wavelength numbering
| Octet | Content |
| 1-2 | ONU identifies (ONU1) |
| 3 | Type of message (Wavelength Adjust Request) |
| 4 | Sequence number |
| 5~x | Emission wavelength numbering after ONU adjusts |
| x+1~y | Reception wavelength numbering after ONU adjusts |
| y+1~40 | Keep position (perhaps mending 0) |
| 41-48 | Message integrity check |
Table 3: direction and adjustment amount are adjusted in indication indirectly
| Octet | Content |
| 1-2 | ONU identifies (ONU1) |
| 3 | Type of message (Wavelength Adjust Request) |
| 4 | Sequence number |
| 5~x | The ONU emission wavelength is with respect at present just at adjustment direction and the adjustment amount of operation wavelength |
| x+1~y | ONU receives wavelength with respect at present just at adjustment direction and the adjustment amount of operation wavelength |
| y+1~40 | Keep position (perhaps mending 0) |
| 41-48 | Message integrity check |
Step 3, OLT arranges the wavelength adjustment and tolerates that the value of thresholding duration is not less than the twice of following three value sum: t1, t2, t3.OLT suppresses ONU1 because carry out wavelength to transfer long and OLT disconnects the alarm (duration of inhibition can be set to switching tolerance thresholding duration) that produces and passes through λ
d1, λ
d2Two channel allocations are used for ONU1 and adjust the uplink transmission resource information (for example uplink timeslice) of result feedback.
The distribution of this uplink transmission resource need to present different modes according to the difference of PON system and the difference of management channels, such as the PLOAM passage, OLT distributes indication and the uplink transmission resource of ONU1 uplink PLOAM, if OMCI passage, OLT distributes the corresponding uplink transmission resource of ONU1 uplink OMCI message, specifically can be with reference to specific embodiment.
Step 4, ONU1 is at descending λ
d1Operation wavelength in receive wavelength adjustment that OLT sends and require after, target wavelength is as indicated carried out the wavelength adjustment, ONU1 notifies switching result to OLT, and the type of message of feedback message is wavelength adjustment response (Wavelength Adjust Response).
If the wavelength adjustment of ONU1 success, ONU1 is at λ
d2Carry out physical layer synchronization (time is made as t2) on wavelength channel afterwards, just can be at new operation wavelength λ
u2And λ
d2Carry out data input and data output.This moment, ONU1 can utilize OLT at downstream wavelength λ
d2The management channels uplink transmission resource of distributing on passage sends the results messages of wavelength adjustment success to OLT.
Mode one as an example of G-PON1 PLOAM message format example is as shown in table 4:
Table 4:
| Octet | Content |
| 1-2 | ONU identifies (ONU1) |
| 3 | Type of message (Wavelength Adjust Response) |
| 4 | Sequence number |
| 5 | The result feedback that wavelength is adjusted: success |
| 6 | Reason: success can be ignored, and is failed insert reason; (optional) |
| 7~x | The emission wavelength absolute value (optional) that ONU is present |
| x+1~y | The reception wavelength absolute value (optional) that ONU is present |
| y+1~40 | Keep position (perhaps mending 0) |
| 41-48 | Message integrity check |
Mode two as an example of the G-PON1PLOAM message format example is as shown in table 5:
Table 5:
| Octet | Content |
| 1-2 | ONU identifies (ONU1) |
| 3 | Type of message (Wavelength Adjust Response) |
| 4 | Sequence number |
| 5 | The result feedback that wavelength is adjusted: success |
| 6 | Reason: success can be ignored, and is failed insert reason; (optional) |
| 7~x | The emission wavelength numbering (optional) that ONU is present |
| x+1~y | The reception wavelength numbering (optional) that ONU is present |
| y+1~40 | Keep position (perhaps mending 0) |
| 41-48 | Message integrity check |
If the wavelength adjustment of ONU1 failure, ONU1 gets back to the up λ of original wavelength channel
u1With descending λ
d1Recover with OLT to communicate by letter (wavelength channel of perhaps getting back to reservation recovers to communicate by letter with OLT).ONU1 is at λ
d1After carrying out physical layer synchronization on wavelength channel, just can be at λ
u1And λ
d1Carry out data input and data output.This moment, ONU1 can utilize OLT at downstream wavelength λ
d1The management channels uplink timeslice of distributing on passage, send the results messages of wavelength adjustment failure to OLT, and the message format of use is identical with table 4 or table 5, but the content of one of the wavelength of feedback adjustment result is unsuccessfully.
Step 5, OLT is at λ
u2After receiving the successful confirmation of ONU1, cancel described inhibition operation, stop at the operation that sends corresponding uplink transmission resource information in former downstream wavelength passage and target downlink wavelength channel, OLT and ONU1 work in λ
u2And λ
d2.Perhaps, OLT is at λ
u1After receiving the adjustment failure of ONU1, cancel described inhibition operation, stop at the operation that sends corresponding uplink transmission resource information in former downstream wavelength passage and target downlink wavelength channel, OLT and ONU1 work in λ
u1And λ
d1.
OLT does not receive the switching result of ONU1 feedback after wavelength adjustment tolerance thresholding duration is overtime, separate this ONU1 of registration.
Specific embodiment one:
Be applied to the adjustment examples of many successful of PLOAM passage.
The situation of system works before the wavelength adjustment:
Up 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.
ONU wavelength switching duration is that 4000us(is called t1), ONU single physical layer synchronization duration is 500us (being called t2), ONU completes and adjusts the required handling duration of result feedback is that 4000us(is called t3).
ONU1 successfully registers at OLT, and with OLT, works at wavelength to (D3, U3).
OLT TC layer protocol basis is the XG-PON1 system.
OLT wavelength adjustment tolerance threshold value is set to 5 seconds, meets the requirement that is not less than following three value sums: the twice of t1, t2, t3.
As shown in Figure 2, the implementation procedure of this specific embodiment comprises the following steps 101 to step 107:
Step 101:OLT issues PLOAM message, and type of message is that wavelength is adjusted requirement, and indication ONU1 adjusts to wavelength in (D2, U2).
Message format is as shown in table 6:
Table 6:
| Octet | Content |
| 1-2 | ONU identifies (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:OLT starts the wavelength adjustment and tolerates that thresholding is the timer of 5 seconds, suppressed when ONU1 disconnects with OLT because of adjusting wavelength the alarm that produces before it is overtime, and the transmission allocated bandwidth instruction of repetition period on downstream wavelength D2 and D3: in this allocated bandwidth instruction, the time started parameter of indication uplink timeslice is 100, and authorizing duration is 32.
The PLOAM message that step 103:ONU1 receives step 101 on the D3 wavelength channel in, OLT issues, and successful according to requiring to adjust its operation wavelength to D2 in order, U2, expending duration is t1.
Step 104:ONU1 successfully carries out physical layer synchronization on the passage of downstream wavelength D2, expending duration is t2.
Step 105:ONU1 receives OLT sends in step 102 allocated bandwidth instruction on the passage of downstream wavelength D2.
Step 106:ONU1, according to the allocated bandwidth instruction of receiving in step 105, is adjusted to the PLOAM response message of merit to OLT feedback wavelength.
Message format is as shown in table 7:
Table 7:
| Octet | Content |
| 1-2 | ONU identifies (ONU1) |
| 3 | Type of message (Wavelength Adjust Response) |
| 4 | 01 |
| 5 | The result feedback that wavelength is adjusted: success |
| 6 | Reason: ignore (optional) |
| 7~10 | 1577.25nm(D2) optional |
| 11~14 | 1267.5nm(U2) optional |
| 15~40 | Mend 0 |
| 41-48 | Message integrity check |
Step 107:OLT is receiving ONU1 sends in step 106 PLOAM message on the U2 wavelength channel before timer expiry, type of message is wavelength adjustment response (Wavelength_adjust_response), alarm in cancellation step 2 suppresses, and the allocated bandwidth instruction that issues at D2 and D3 downstream wavelength passage, OLT and ONU1 (D2, U2) wavelength on carry out proper communication.
Specific embodiment two
Be applied to the adjustment failure example of OMC passage.
Identical in system parameters and specific embodiment one.
As shown in Figure 3, the implementation procedure of this specific embodiment comprises the following steps 201 to step 207:
Step 201:OLT issues OMCI message, and type of message is that wavelength is adjusted requirement, and indication ONU1 adjusts to wavelength in (D2, U2).
Step 202:OLT starts the wavelength adjustment and tolerates that thresholding is the timer of 5 seconds, suppressed when ONU1 disconnects with OLT because of adjusting wavelength the alarm that produces before it is overtime, and the transmission allocated bandwidth instruction of repetition period on downstream wavelength D2 and D3, in this allocated bandwidth instruction, the time started parameter of indication uplink timeslice is 100, and authorizing duration is 100.
The OMCI message that step 203:ONU1 receives step 201 on the D3 wavelength channel in, OLT issues, and according to require adjusting its operation wavelength in order to D2, U2, come back to original wavelength to D3 after adjusting unsuccessfully, U3, expending duration is 2*t1.
Step 204:ONU1 successfully carries out physical layer synchronization on the passage of downstream wavelength D3, expending duration is t2.
Step 205:ONU1 receives OLT sends in step 202 allocated bandwidth instruction on the passage of downstream wavelength D3.
Step 206:ONU1, according to the allocated bandwidth instruction of receiving in step 205, sends OMCI message at U3 upgoing wave long-channel, and carry in this message and adjust failed indication, and the operation wavelength D3 that is using at present, U3.
Step 207:OLT is in the OMCI message of receiving ONU1 sends in step 206 indication wavelength adjustment failure before timer expiry on the U3 wavelength channel, alarm in cancellation step 202 suppresses, and the allocated bandwidth instruction that issues at D2 and D3 downstream wavelength passage.OLT and ONU1 carry out follow-up communication at (D3, U3) wavelength.
Specific embodiment three:
Be applied to the overtime example of OMCI passage.
Identical in system parameters and specific embodiment one.
The implementation procedure of this specific embodiment comprises the following steps 301 to step 304:
Step 301:OLT issues OMCI message, and type of message is that wavelength is adjusted requirement, and indication ONU1 adjusts to wavelength in (D2, U2).
Step 302:OLT starts the wavelength adjustment and tolerates that thresholding is the timer of 5 seconds, suppressed when ONU1 disconnects with OLT because of adjusting wavelength the alarm that produces before it is overtime, and the following allocated bandwidth instruction of the transmission of repetition period on downstream wavelength D2 and D3: in this allocated bandwidth instruction, the time started parameter of indication uplink timeslice is 100, and authorizing duration is 100.
The OMCI message that step 303:ONU1 receives step 301 on the D3 wavelength channel in, OLT issues, and according to requiring to adjust its operation wavelength to D2 in order, U2, come back to former wavelength to D3 after failure, U3, but expend duration over 5 seconds.
Step 304:OLT after timer expiry, separates registration ONU1, and sends the PLOAM message (deavtive_ONU_ID) of separating registration ONU1 in certain hour on D2 and D3 down going channel.
This programme can realize providing solution for the rationalization that ONU carries out the wavelength adjustment, improves the handling property of passive optical network.
Need to prove, in the situation that do not conflict, the embodiment in the application and the feature in embodiment be combination in any mutually.
Certainly; the present invention also can have other various embodiments; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
One of ordinary skill in the art will appreciate that all or part of step in said method can come the instruction related hardware to complete by program, described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (20)
1. one kind is carried out the method that wavelength is adjusted, be applied in EPON, wherein,
Optical line terminal send to be adjusted the message of former operation wavelength to target wavelength to optical network unit, described optical network unit with described former operation wavelength to described target wavelength adjustment;
After adjusting successfully, described optical network unit in the passage of described target wavelength to the indication of described optical line terminal feedback adjusting success; After perhaps adjusting unsuccessfully, described optical network unit in the passage of described former operation wavelength to the indication of described optical line terminal feedback adjusting failure.
2. the method for claim 1, is characterized in that,
Described former operation wavelength refers to that described optical network unit carries out the wavelength that uses before the wavelength adjustment, comprises up wavelength and downstream wavelength;
Described target wavelength refers to that described optical network unit successfully carries out the wavelength that should use after the wavelength adjustment, comprises up wavelength and downstream wavelength.
3. the method for claim 1, is characterized in that,
Described optical line terminal sends uplink transmission resource information in the passage of described target wavelength, and sends uplink transmission resource information in the passage of described former operation wavelength;
After described optical network unit adjustment success, the successful indication of uplink transmission resource information feedback that sends in the passage according to described target wavelength; Perhaps after described optical network unit adjustment failure, use the indication of the uplink transmission resource information feeding back unsuccessful that sends in the passage of described former operation wavelength.
4. the method for claim 1, is characterized in that,
The message of described optical line terminal to the former operation wavelength of described optical network unit transmission adjustment to target wavelength specifically refers to: it is wavelength adjustment requirement and the physical layer operations management maintenance message of carrying target wavelength information that described optical line terminal sends type of message to described optical network unit, or optical network unit management control interface message, or operation management maintain message;
Described target wavelength information comprises one of following parameters at least: the wavelength absolute value of target wavelength, the wavelength numbering of target wavelength, target wavelength is than the adjustment direction of adjusting the front former operation wavelength of using, and target wavelength is than the adjustment amount of adjusting the front former operation wavelength of using.
5. one kind is carried out the method that operation wavelength is adjusted, be applied in EPON, wherein,
Optical line terminal sends and adjusts the message of former operation wavelength to target wavelength to optical network unit, and the value that wavelength adjustment tolerance thresholding duration is set is not less than following three value sums: the twice of the wavelength switching duration of described optical network unit, the single physical layer synchronization duration of described optical network unit, described optical network unit are completed and are adjusted the required handling duration of result feedback.
6. method as claimed in claim 5, is characterized in that,
Described wavelength switching duration refers to that described optical network unit adjusts to operation wavelength in transmitter the maximum of permission from the minimum value that allows, or from the maximum that allows, adjust to the duration of the minimum value of permission, or adjust to the single duration of target wavelength from former operation wavelength;
Described single physical layer synchronization duration refers to that described optical network unit completes the duration required with the physical layer synchronization of described optical line terminal.
7. method as claimed in claim 5, is characterized in that,
After described optical line terminal sends described message to optical network unit, suppress the alarm that described optical network unit and the disconnection of described optical line terminal produce in described wavelength adjustment tolerance thresholding duration.
8. method as claimed in claim 5, is characterized in that,
After described optical line terminal sends described message to optical network unit, send to described optical network unit the uplink transmission resource information that is used for receiving the indication of optical network unit feedback in the passage of the passage of former operation wavelength and target wavelength in described wavelength adjustment tolerance thresholding duration.
9. optical line terminal, wherein,
Described optical line terminal comprises wavelength adjustment control module and adjusts receiver module as a result;
Described wavelength is adjusted control module, is used for sending and adjusting the message of former operation wavelength to target wavelength to optical network unit;
Described adjustment is receiver module as a result, is used for the indication of the adjustment success of the described optical network unit feedback of reception on the passage of described target wavelength, perhaps receives the indication of the adjustment failure of described optical network unit feedback on the passage of described former operation wavelength.
10. optical line terminal as claimed in claim 9, is characterized in that,
Described former operation wavelength refers to that described optical network unit carries out the wavelength that uses before the wavelength adjustment, comprises up wavelength and downstream wavelength;
Described target wavelength refers to that described optical network unit successfully carries out the wavelength that should use after the wavelength adjustment, comprises up wavelength and downstream wavelength.
11. optical line terminal as claimed in claim 9, is characterized in that,
Described optical line terminal also comprises the uplink transmission resource sending module;
The uplink transmission resource sending module, be used for sending at the passage of former operation wavelength and the passage of target wavelength the uplink transmission resource information that is used for receiving the indication of optical network unit feedback to described optical network unit.
12. optical line terminal as claimed in claim 9, is characterized in that,
Described message refers to that type of message is wavelength adjustment requirement and the physical layer operations management maintenance message of carrying target wavelength information, or optical network unit management control interface message, or operation management maintain message;
Described target wavelength information comprises one of following parameters at least: the wavelength absolute value of target wavelength, the wavelength numbering of target wavelength, target wavelength is than the adjustment direction of adjusting the front former operation wavelength of using, and target wavelength is than the adjustment amount of adjusting the front former operation wavelength of using.
13. an optical line terminal, wherein,
Described optical line terminal comprises that wavelength is adjusted control module and wavelength adjustment tolerance thresholding duration arranges module;
Described wavelength is adjusted control module, is used for sending and adjusting the message of former operation wavelength to target wavelength to optical network unit;
Described wavelength adjustment tolerance thresholding duration arranges module, be used for that the wavelength adjustment is set and tolerate that the value of thresholding duration is not less than following three value sums: the twice of the wavelength switching duration of described optical network unit, the single physical layer synchronization duration of described optical network unit, described optical network unit are completed and are adjusted the required handling duration of result feedback.
14. optical line terminal as claimed in claim 13, is characterized in that,
Described wavelength switching duration refers to that described optical network unit adjusts to operation wavelength in transmitter the maximum of permission from the minimum value that allows, or from the maximum that allows, adjust to the duration of the minimum value of permission, or adjust to the single duration of target wavelength from former operation wavelength;
Described single physical layer synchronization duration refers to that described optical network unit completes the duration required with the physical layer synchronization of described optical line terminal.
15. optical line terminal as claimed in claim 13, is characterized in that,
Described wavelength is adjusted control module, and after also being used for sending described message to described optical network unit, the described optical network unit of inhibition and described optical line terminal disconnect the alarm that produces in described wavelength adjustment tolerance thresholding duration.
16. optical line terminal as claimed in claim 13, is characterized in that,
Described wavelength is adjusted control module, after also being used for sending described message to optical network unit, send to described optical network unit the uplink transmission resource information that is used for receiving the indication of optical network unit feedback in the passage of the passage of former operation wavelength and target wavelength in described wavelength adjustment tolerance thresholding duration.
17. an optical network unit, wherein, described optical network unit comprises wavelength adjustment processing module and switching result feedback module;
Described wavelength is adjusted processing module, is used for receiving the former operation wavelength of adjustment that optical line terminal the sends message to target wavelength, with described former operation wavelength to described target wavelength adjustment;
Described adjustment result feedback module, be used for after described wavelength is adjusted processing module adjustment success, in the passage of described target wavelength to the indication of described optical line terminal feedback adjusting success; Perhaps after described wavelength is adjusted processing module adjustment failure, in the passage of described former operation wavelength to the indication of described optical line terminal feedback adjusting failure.
18. optical network unit as claimed in claim 17, is characterized in that,
Described optical network unit also comprises the uplink transmission resource receiver module;
Described uplink transmission resource receiver module, be used for after described wavelength is adjusted processing module adjustment success, receive uplink transmission resource information on the passage of target wavelength, perhaps after described wavelength is adjusted processing module adjustment failure, receive uplink transmission resource information on the passage of former operation wavelength.
19. optical network unit as claimed in claim 18, is characterized in that,
Described adjustment result feedback module, be used for after described wavelength is adjusted processing module adjustment success, according to the successful indication of the feedback of the uplink transmission resource information in described target wavelength passage; Perhaps after described wavelength is adjusted processing module adjustment failure, according to the indication of the uplink transmission resource information feeding back unsuccessful in described former operation wavelength passage.
20. a passive optical network, wherein, comprise optical line terminal in described claim 9 to 16 and the optical network unit in described claim 17 to 19.
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