CN107241138A - XG-PON systems and its channel switching are resurveyed away from control method - Google Patents
XG-PON systems and its channel switching are resurveyed away from control method Download PDFInfo
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- CN107241138A CN107241138A CN201610182579.7A CN201610182579A CN107241138A CN 107241138 A CN107241138 A CN 107241138A CN 201610182579 A CN201610182579 A CN 201610182579A CN 107241138 A CN107241138 A CN 107241138A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/038—Arrangements for fault recovery using bypasses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
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Abstract
The invention discloses resurveying away from control method after channel switching in a kind of XG PON systems, ONT Optical Network Terminal ONU and the main channel of optical line terminal OLT or alternate channel in XG PON systems are connected, and this method includes：After OLT is switched to alternate channel from main channel, OLT issues physical layer operations management to ONU by alternate channel and safeguards PLOAM authorization of messages；When OLT receives the ascending response message that ONU is sent based on PLOAM authorization of messages by alternate channel, OLT calculates balanced time delays of the ONU under alternate channel based on the ascending response message received；OLT issues balanced time delay by ranging time message to ONU, so that ONU is based on balanced time delay stable operation under alternate channel.The present invention realizes ONU stable operations under alternate channel so that in XG PON systems user business transmitting.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of 10,000,000,000 Gbit passive optical network systems and
Its channel switching is resurveyed away from control method.
Background technology
10000000000 gigabit passive optical network XG-PON systems include optical line terminal (Optical Line
Terminal, OLT), ONT Optical Network Terminal (Optical Network Unit, ONU) and Optical Distribution Network
(Optical Distribution Network, ODN), the transmission direction from OLT to ONU is down direction,
Transmission direction from ONU to OLT is up direction.With the development of the communication technology, user is to OLT
Bandwidth (data volume that can be transmitted on the line in the unit interval) demand of optical line terminal also constantly increases
It is long, due to the high bandwidth of the XG-PON systems, high efficiency, high splitting ratio and more longer transmission distance performance,
So that XG-PON systems are widely used, and how to ensure user in XG-PON systems
Business reliability service into equipment vendor and operator's question of common concern.When XG-PON systems are normal
During work, it is transmitted by OLT and ONU business by main channel.When main channel is broken down
When, then it is switched to alternate channel and carries out business transmission.After alternate channel is switched to, again after ranging,
Business can normal transmission.The transmission channel switches concretely comprising the following steps for flow：
To the ONU in access XG-PON systems, after ONU normally starts, the ONU is passed through respectively
Original state (O1 states), serial-number-state (O2-3 states), distance measuring states (O4 states) are crossed, so
Enter normal operating condition (O5 states) afterwards so that ONU stable operations under OLT main channel.
Broken down in current main channel, ONU is detected after LODS (downstream signal interruption), the ONU
Fault recovery wait state (O6 states) is entered by O5 states, and starts a timer (according to standard
Be set to 100ms) come detect the ONU downstream signal whether in preset time recover, meanwhile, OLT
After ONU upward signal exception is detected, main channel is closed, alternate channel is opened；When OLT is beaten
Open after alternate channel, if timer has not timed out, ONU is in O6 state-detections to the descending light letters of DSYNC
After number synchronous success, O5 states are switched to again, if after timer expiry, ONU is switched to O1 states.
Due in XG-PON standards (ITU-T G987.3), not yet explicitly requiring when transmission channel is switched
Afterwards, ONU sends Registration ID (registration ID) message under O5 states and responds this to OLT
The ranging mandate that OLT is issued, to carry out ranging again to the ONU, also, in XG-PON standards
In be not defined yet OLT pass through fault recovery wait PLOAM (POPUP PLOAM) message control
ONU processed be switched to O4 states resurveyed away from process, hence in so that user in XG-PON systems
Business is unable to transmitting.
The content of the invention
It is a primary object of the present invention to propose the resurveying away from control of a kind of XG-PON systems and its channel switching
Method processed, it is intended to solve in XG-PON standards, not yet explicitly require that ONU is switched to alternate channel
After normal operating condition, the ranging mandate issued based on OLT is under the alternate channel in the OLT transmissions
Row Registration ID message come resurvey away from the problem of.
To achieve the above object, in a kind of XG-PON systems for providing of the present invention channel switching resurvey away from
The master of ONT Optical Network Terminal ONU and optical line terminal OLT in control method, the XG-PON systems
Passage or alternate channel connection, the described method comprises the following steps：
After the OLT is switched to the alternate channel from the main channel, the OLT passes through described standby
Physical layer operations management is issued to the ONU and safeguard PLOAM authorization of messages with passage；
The ONU is received by the alternate channel in the OLT and is based on the PLOAM message
When authorizing the ascending response message sent, the OLT is calculated based on the ascending response message received
Balanced time delays of the ONU under the alternate channel；
The OLT issues the balanced time delay by ranging time message to the ONU, so that described
ONU is based on balanced time delay stable operation under the alternate channel.
Preferably, the OLT calculates the ONU in institute based on the ascending response message received
The step of stating the balanced time delay under alternate channel includes：
The of the ONU under the alternate channel is calculated based on the ascending response message that receives
One balanced time delay, and obtain second balanced time delays of the ONU preserved under the main channel；
The difference of the described first balanced time delay time delay balanced with described second is calculated, and determines that the difference is
Balanced time delays of the ONU under the alternate channel.
Preferably, described after OLT is switched to the alternate channel from the main channel, the OLT leads to
Cross the alternate channel to the ONU issue ranging authorization messages the step of before also include：
When normally being run in the main channel, by second balanced time delays of the ONU under the main channel
It is saved in the alternate channel.
To achieve the above object, channel switching resurveys in a kind of XG-PON systems that the present invention is provided again
Away from control method, ONT Optical Network Terminal ONU's and optical line terminal OLT in the XG-PON systems
Main channel or alternate channel connection, the described method comprises the following steps：
In the ONU alternate channel is switched to from the fault recovery wait state of the main channel
During normal operating condition, the ONU receives the PLOAM that the OLT is issued by the alternate channel
Authorization of messages；
The ONU is based on the PLOAM authorization of messages and sent out under the alternate channel to the OLT
Ascending response message is sent, so that the OLT calculates described based on the ascending response message received
Balanced time delays of the ONU under the alternate channel；
The ONU receives the balanced time delay that the OLT is issued by ranging time message, and root
According to balanced time delay stable operation under the alternate channel.
Preferably, the ONU is based on the ranging authorization messages under the alternate channel to the OLT
The step of sending ascending response message includes：
Described second balanced time delay is used as the frame initial time for sending the ascending response message；
Ascending response message is sent to the OLT based on the frame initial time.
In addition, to achieve the above object, the present invention also provides a kind of XG-PON systems, including：Light net
ONT Optical Network Terminal ONU in network terminal ONU and optical line terminal OLT, the XG-PON systems with
The main channel of optical line terminal OLT or alternate channel connection；Wherein, the optical line terminal OLT bag
Include：
First sending module, for after the OLT is switched to the alternate channel from the main channel,
Physical layer operations management is issued to the ONU by the alternate channel and safeguards that PLOAM message is awarded
Power；
Computing module, institute is based on for receiving the ONU by the alternate channel in the OLT
State PLOAM authorization of messages transmission the ascending response message when, based on receive it is described it is up should
Answer message and calculate balanced time delays of the ONU under the alternate channel；
Second sending module, for by ranging time message to the ONU issue it is described balanced when
Prolong, so that the ONU is based on balanced time delay stable operation under the alternate channel.
Preferably, the computing module is additionally operable to：
The of the ONU under the alternate channel is calculated based on the ascending response message that receives
One balanced time delay, and obtain second balanced time delays of the ONU under the main channel；
The difference of the described first balanced time delay time delay balanced with described second is calculated, and determines that the difference is
Balanced time delays of the ONU under the alternate channel.
Preferably, the optical line terminal OLT also includes：
Preserving module, during for normally being run in the main channel, by the ONU under the main channel
The second balanced time delay be saved in the alternate channel.
In addition, to achieve the above object, the present invention also provides XG-PON systems again, including：Optical-fiber network
ONT Optical Network Terminal ONU and light in terminal ONU and optical line terminal OLT, the XG-PON systems
Line terminal OLT main channel or alternate channel connection；Wherein, the ONT Optical Network Terminal ONU bags
Include：
First receiving module, for being switched in the ONU from the fault recovery wait state of the main channel
To the alternate channel normal operating condition when, receive what the OLT was issued by the alternate channel
PLOAM authorization of messages；
Sending module, for based on the PLOAM authorization of messages under the alternate channel to the OLT
Ascending response message is sent, so that the OLT is based on receiving described in the ascending response message calculating
Balanced time delays of the ONU under the alternate channel；
Second receiving module, for receive the OLT by ranging time message issue it is described balanced when
Prolong, and according to balanced time delay stable operation under the alternate channel.
Preferably, the sending module includes：
It regard the described second balanced time delay as the frame initial time for sending the ascending response message；
Transmitting element, for sending ascending response message to the OLT based on the frame initial time.
The present invention by after OLT is switched to alternate channel from main channel, the OLT by alternate channel to
ONU issues PLOAM authorization of messages, and receiving ONU by alternate channel in OLT is based on PLOAM
During the ascending response message that authorization of messages is sent, the OLT is calculated based on the ascending response message received
Balanced time delays of the ONU under alternate channel, the OLT is simultaneously issued by ranging time message to ONU
Weigh time delay, so that ONU is based on balanced time delay stable operation under alternate channel.Because the ONU is from master
The fault recovery wait state of passage is switched to after the normal operating condition of alternate channel, receives OLT from standby
The PLOAM authorization of messages issued with passage, and sent based on the PLOAM authorization of messages to the OLT
Up Acknowledge PLOAM message so that the OLT calculates the OLT under the alternate channel and arrived
The balanced time delay of the ONU, the ONU receive that the OLT issues this it is balanced when delay, complete
Resurvey away from so that ONU stable operations under alternate channel, hence in so that being used in XG-PON systems
The business transmitting at family.
Brief description of the drawings
Fig. 1 is that channel switching resurveys the first embodiment away from control method in XG-PON systems of the present invention
Schematic flow sheet；
Fig. 2 is that channel switching is resurveyed in the second embodiment away from control method in XG-PON systems of the present invention
OLT calculates equilibriums of the ONU under the alternate channel based on the ascending response message received
The refinement schematic flow sheet of time delay；
Fig. 3 is that channel switching resurveys the 3rd embodiment away from control method in XG-PON systems of the present invention
Schematic flow sheet；
Fig. 4 is that channel switching resurveys the fourth embodiment away from control method in XG-PON systems of the present invention
Schematic flow sheet；
In the 5th embodiments resurveyed away from control method of the Fig. 5 for channel switching in XG-PON systems of the present invention
ONU is based on the PLOAM authorization of messages and sends up response to the OLT under the alternate channel
The refinement schematic flow sheet of message；
Fig. 6 is that the functional module of the first embodiment of optical line terminal OLT in XG-PON systems of the present invention is shown
It is intended to；
Fig. 7 is that the functional module of the second embodiment of optical line terminal OLT in XG-PON systems of the present invention is shown
It is intended to；
The functional module for the 3rd embodiment that Fig. 8 is ONT Optical Network Terminal ONU in XG-PON systems of the present invention
Schematic diagram；
Sending module in the fourth embodiment that Fig. 9 is ONT Optical Network Terminal ONU in XG-PON systems of the present invention
Refinement high-level schematic functional block diagram.
The realization, functional characteristics and advantage of the object of the invention will be done further referring to the drawings in conjunction with the embodiments
Explanation.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, limit is not used to
The fixed present invention.
Based on above mentioned problem, channel switching resurveys away from control in a kind of XG-PON systems of present invention offer
Method.
Reference picture 1, Fig. 1 is that channel switching is resurveyed away from control method in XG-PON systems of the present invention
The schematic flow sheet of first embodiment.
In the present embodiment, resurveying for channel switching includes away from control method in the XG-PON systems：
Step S110, after OLT is switched to alternate channel from main channel, OLT by alternate channel to
ONU issues physical layer operations management and safeguards PLOAM authorization of messages；
In the present embodiment, 10,000,000,000 gigabit passive optical network XG-PON systems include optical line terminal
OLT, the OLT, that is, at main work PON mouthfuls, detect the ONU associated with the OLT in the main channel
Upward signal when losing (ONU LOS), close this main work PON mouthful, the standby work PON of opening
Mouthful, that is, alternate channel is opened, then the OLT is switched on the alternate channel from the main channel and run.The OLT
Physical layer operations management is issued at this standby work PON mouthfuls and PLOAM authorization of messages is safeguarded, that is, issued
Specific ONU management control passage (ONU OMCC) bandwidth, ranging again is carried out to the ONU.
Wherein, the PON mouthfuls is a port on the OLT.
It should be noted that the structure of the PLOAM authorization of messages uses XG-PON standards (ITU-T
G987.3 the structure of the PLOAM authorization of messages defined in), the PLOAM authorization of messages pair is with resurveying
Include away from related field definition：Alloc_ID：The corresponding Alloc_ID values of ONU OMCC passages, with
ONU-ID is consistent；
PLOAMu：Whether PLOAM message flag position can be sent in uplink frame, and 1 represents that ONU can
To fill PLOAM message in the next frame of transmission；
StartTime：OLT is that ONU sends the initial time that next frame distributes time slot, for example：It is configured to
100；
GrantSize：OLT is that ONU sends the width that next frame distributes time slot, for example：It is configured to 8.
The GrantSize domains of O4 states ranging mandate are necessary for 0 as defined in standard.
Step S120, is received ONU by alternate channel in OLT and is sent out based on PLOAM authorization of messages
During the ascending response message sent, OLT calculates ONU in alternate channel based on the ascending response message received
Under balanced time delay；
When ONU receives what OLT was issued by this standby work PON mouthfuls at standby work PON mouthfuls
After PLOAMu flag bits is the 1 ONU OMCC bandwidth, the ONU can then be sent to the OLT
Ascending response message, i.e., up Acknowledge PLOAM message, to respond PLOAMu marks
Position is 1 ONU OMCC bandwidth.The up Acknowledge of ONU transmissions is received in the OLT
After PLOAM message, balanced time delays of the ONU in the case where this is standby work PON mouthfuls is recalculated, is made
Obtain the work that the ONU can stablize in the case where this is standby work PON mouthfuls.
It is understood that the structure of the up Acknowledge PLOAM message is used
The knot of up Acknowledge PLOAM message defined in XG-PON standards (ITU-T G987.3)
Structure：
Byte 1-2：ONU-ID, for recognizing ONU, is distributed by OLT, is protected in protection handoff procedure
Hold consistent；
Byte 3：Message ID defined in standard PLOAM message, for identifying type of message, mark
The Message ID of the up Acknowledge message of quasi- regulation are 0x09；
Byte 4：The sequence number of mark regulation message, no correspondence identical with the sequence number for responding downstream message
During downstream message, 0 is filled with；
Byte 5：Completion_code domains as defined in standard, indicate the respond style of the message, for example：
1 is filled with, no message to send are represented；
Byte 6-40：Region filling, Default population is 0；
Byte 41-48：MIC, message integrity check field requires to calculate filling according to standard.
Step S130, OLT issue balanced time delay by ranging time message to ONU, so that ONU bases
In the stable operation under alternate channel of balanced time delay.
Delayed when the OLT calculates the ONU in the equilibrium under this is standby work PON mouthfuls, the OLT
By ranging time message, i.e., by Ranging_Time PLOAM message, issue this to the ONU equal
Weigh time delay, and the ONU adjusts the transmission starting point of uplink frame according to the balanced time delay, so that the ONU bases
In the stable operation under the alternate channel of balanced time delay.
The present embodiment is by the way that after OLT is switched to alternate channel from main channel, the OLT passes through alternate channel
PLOAM authorization of messages is issued to ONU, receiving ONU by alternate channel in OLT is based on
During the ascending response message that PLOAM authorization of messages is sent, the OLT is disappeared based on the up response received
Breath calculates balanced time delays of the ONU under alternate channel, the OLT and by ranging time message to ONU
Balanced time delay is issued, so that ONU is based on balanced time delay stable operation under alternate channel.Due to the ONU
It is switched to from the fault recovery wait state of main channel after the normal operating condition of alternate channel, receives OLT
The PLOAM authorization of messages issued from alternate channel, and the PLOAM authorization of messages is based on to the OLT
Send up Acknowledge PLOAM message so that the OLT calculates the OLT under the alternate channel
To the balanced time delay of the ONU, the ONU receive that the OLT issues this it is balanced when delay, it is complete
Into resurveying away from so that ONU stable operations under alternate channel, hence in so that in XG-PON systems
The business transmitting of user.
Further, based on the first embodiment, channel switching in XG-PON systems of the present invention is proposed
Resurvey the second embodiment away from control method, in the present embodiment, reference picture 2, above-mentioned steps S120
Including：
Step S121, first of ONU under alternate channel is calculated based on the ascending response message received
Balanced time delay, and obtain second balanced time delays of the ONU preserved under main channel；
In the present embodiment, disappear in the OLT up Acknowledge PLOAM for receiving ONU transmissions
During breath, the OLT is calculated according to the time for receiving the up Acknowledge PLOAM message
First balanced time delays of the ONU under standby work PON mouthfuls, and acquisition is pre-stored in standby work
Second balanced time delays of the ONU under main channel under PON mouthfuls.
Step S122, calculates the difference of the first balanced time delay time delay balanced with second, and determines that difference is
Balanced time delays of the ONU under alternate channel.
It is the second equilibrium with the ONU under main work PON mouthfuls because ONU sends ascending response message
Time delay need to subtract the first balanced time delay the second balanced time delay as frame initial time, obtain
One difference, and determine that the difference is balanced time delays of the ONU under the alternate channel.
The present embodiment based on the ascending response message that receives by calculating the of ONU under alternate channel
One balanced time delay, and obtain second balanced time delays of the ONU preserved under main channel, then calculates the
The difference of one balanced time delay time delay balanced with second, and determine that difference is equilibriums of the ONU under alternate channel
Time delay so that the ONU can get accurate balanced time delay, so that the ONU is standby logical
Stable operation under road.
Further, based on the second embodiment, channel switching in XG-PON systems of the present invention is proposed
Resurvey the 3rd embodiment away from control method, in the present embodiment, reference picture 3, above-mentioned steps S110
Also include before：
Step S140, when normally being run in main channel, by second balanced time delays of the ONU under main channel
It is saved in alternate channel.
In the present embodiment, when OLT and ONU is in main work PON mouthfuls normal operations, the OLT
Ranging is obtained into second balanced time delays of the ONU under main channel to be saved in alternate channel.
The present embodiment is by when the OLT and the ONU are normally run in main channel, and the OLT is by ONU
The second balanced time delay under main channel is saved in alternate channel, and the ONU is calculated standby logical to facilitate
Accurate balanced time delay when being run under road, so as to play the work that XG-PON system channels switch double protections
With.
Resurveyed the present invention further provides channel switching in a kind of XG-PON systems away from control method.
Reference picture 4, Fig. 4 is that channel switching is resurveyed away from control method in XG-PON systems of the present invention
The schematic flow sheet of fourth embodiment.
In the present embodiment, resurveying for channel switching includes away from control method in the XG-PON systems：
Step S210, alternate channel is being switched to just in ONU from the fault recovery wait state of main channel
During normal running status, ONU receives the PLOAM authorization of messages that OLT is issued by alternate channel；
In the present embodiment, XG-PON systems include ONT Optical Network Terminal ONU, and the ONU detects LODS
Fault recovery wait state, i.e. O6 states are switched to after (downstream signal loss), and enables a timing
Device (being set to 100ms according to standard) come detect the ONU downstream signal whether in preset time it is extensive
It is multiple, if in preset time, the ONU O6 state-detections to DSYNC downlink optical signals synchronization into
After work(, then the ONU is switched to standby work PON mouthfuls of normal operating condition, i.e. O5 states, waits
Resurvey away from.When the ONU is switched to the O5 states under standby work PON mouthfuls, the ONU is received
OLT passes through this standby work PON mouthfuls PLOAM authorization of messages issued, i.e. PLOAMu flag bits
For 1 ONU OMCC bandwidth.
Step S220, it is up to OLT transmissions under alternate channel that ONU is based on PLOAM authorization of messages
Response message, so that OLT calculates ONU under alternate channel based on the ascending response message received
Balanced time delay；
When it is 1 ONU OMCC bandwidth that ONU, which receives the PLOAMu flag bits that OLT issues,
Then the ONU is used as the frame starting for sending ascending response message using the second balanced time delay under PON mouthfuls that works
Moment, to the OLT send ascending response message, i.e., up Acknowledge PLOAM message, with
The OLT is set to calculate the ONU based on the ascending response message received equal under standby work PON mouthfuls
Weigh time delay.
The balanced time delay that step S230, ONU reception OLT is issued by ranging time message, and according to
The stable operation under alternate channel of balanced time delay.
After the ascending response message that OLT receives ONU transmissions, the OLT calculates the ONU at this
Balanced time delay under standby work PON mouthfuls, and by the balanced time delay calculated by ranging time message,
I.e. Ranging_Time PLOAM message, is handed down to the ONU.The OLT is received in the ONU to lead to
Delayed when crossing the equilibrium that ranging time message issues, the ONU adjusts the hair of uplink frame according to the balanced time delay
Starting point is sent, so as to the stable operation in the case where this is standby PON mouthfuls.
The present embodiment from the fault recovery wait state of main channel in ONU by being switched to alternate channel
During normal operating condition, the ONU receives the PLOAM authorization of messages that OLT is issued by alternate channel,
And ascending response message is sent to OLT under alternate channel based on PLOAM authorization of messages, so that OLT
Balanced time delays of the ONU under alternate channel is calculated based on the ascending response message received, in the ONU
It is delayed during the equilibrium that reception OLT is issued by ranging time message, the ONU is according to balanced time delay standby
With stable operation under passage so that in XG-PON systems user business transmitting.
Further, based on the fourth embodiment, channel switching in XG-PON systems of the present invention is proposed
The 5th embodiment resurveyed away from control method, in the present embodiment, reference picture 5, above-mentioned steps S220
Including：
Step S221, regard the second balanced time delay as the frame initial time for sending ascending response message；
Step S222, ascending response message is sent based on frame initial time to OLT.
In the present embodiment, the ONU that the PLOAMu flag bits that OLT issues are 1 is received in ONU
During OMCC bandwidth, using the second balanced time delay as the frame initial time for sending ascending response message, to
The OLT sends the up Acknowledge PLOAM message.
The present embodiment by using the second balanced time delay as the frame initial time for sending ascending response message, and
Ascending response message is sent to OLT based on frame initial time so that the OLT can accurately calculate this
Balanced time delays of the ONU under alternate channel.
The present invention further provides a kind of XG-PON systems.
Reference picture 6, Fig. 6 is the first embodiment of optical line terminal OLT in XG-PON systems of the present invention
High-level schematic functional block diagram.
In the present embodiment, the optical line terminal OLT includes：First sending module 110, calculating mould
Block 120, the second sending module 130.
First sending module 110, for after OLT is switched to alternate channel from main channel, passing through
Alternate channel issues physical layer operations management to ONU and safeguards PLOAM authorization of messages；
In the present embodiment, 10,000,000,000 gigabit passive optical network XG-PON systems include optical line terminal
OLT, the OLT, that is, at main work PON mouthfuls, detect the ONU associated with the OLT in the main channel
Upward signal when losing (ONU LOS), close this main work PON mouthful, the standby work PON of opening
Mouthful, that is, alternate channel is opened, then the OLT is switched on the alternate channel from the main channel and run.The OLT
In the first sending module 110 issued at this standby work PON mouthfuls physical layer operations management and safeguard
PLOAM authorization of messages, that is, issue specific ONU management control passage (ONU OMCC) bandwidth,
Again ranging is carried out to the ONU.Wherein, the PON mouthfuls is a port on the OLT.
It should be noted that the structure of the PLOAM authorization of messages uses XG-PON standards (ITU-T
G987.3 the structure of the PLOAM authorization of messages defined in), the PLOAM authorization of messages pair is with resurveying
Include away from related field definition：Alloc_ID：The corresponding Alloc_ID values of ONU OMCC passages, with
ONU-ID is consistent；
PLOAMu：Whether PLOAM message flag position can be sent in uplink frame, and 1 represents that ONU can
To fill PLOAM message in the next frame of transmission；
StartTime：OLT is that ONU sends the initial time that next frame distributes time slot, for example：It is configured to
100；
GrantSize：OLT is that ONU sends the width that next frame distributes time slot, for example：It is configured to 8.
The GrantSize domains of O4 states ranging mandate are necessary for 0 as defined in standard.
The computing module 120, PLOAM is based on for receiving ONU by alternate channel in OLT
During the ascending response message that authorization of messages is sent, ONU is calculated standby based on the ascending response message received
With the balanced time delay under passage；
When ONU receives what OLT was issued by this standby work PON mouthfuls at standby work PON mouthfuls
After PLOAMu flag bits is the 1 ONU OMCC bandwidth, the ONU can then be sent to the OLT
Ascending response message, i.e., up Acknowledge PLOAM message, to respond PLOAMu marks
Position is 1 ONU OMCC bandwidth.The up Acknowledge of ONU transmissions is received in the OLT
After PLOAM message, computing module 120 recalculates the ONU in the case where this is standby work PON mouthfuls
Balanced time delay so that the ONU being capable of steady operation in the case where this is standby PON mouthfuls.
It is understood that the structure of the up Acknowledge PLOAM message is used
The knot of up Acknowledge PLOAM message defined in XG-PON standards (ITU-T G987.3)
Structure：
Byte 1-2：ONU-ID, for recognizing ONU, is distributed by OLT, is protected in protection handoff procedure
Hold consistent；
Byte 3：Message ID defined in standard PLOAM message, for identifying type of message, mark
The Message ID of the up Acknowledge message of quasi- regulation are 0x09；
Byte 4：The sequence number of mark regulation message, no correspondence identical with the sequence number for responding downstream message
During downstream message, 0 is filled with；
Byte 5：Completion_code domains as defined in standard, indicate the respond style of the message, for example：
1 is filled with, no message to send are represented；
Byte 6-40：Region filling, Default population is 0；
Byte 41-48：MIC, message integrity check field requires to calculate filling according to standard.
The computing module 120, is additionally operable to calculate ONU standby based on the ascending response message received
The first balanced time delay under passage, and obtain second balanced time delays of the ONU preserved under main channel；
In the present embodiment, disappear in the OLT up Acknowledge PLOAM for receiving ONU transmissions
During breath, the computing module 120 in the OLT disappears according to the up Acknowledge PLOAM are received
The time of breath, first balanced time delays of the ONU under standby work PON mouthfuls is calculated, and obtain pre-
First it is stored in second balanced time delays of the ONU under standby work PON mouthfuls under main channel.
The computing module 120, is additionally operable to calculate the difference of the first balanced time delay time delay balanced with second, and
It is balanced time delays of the ONU under alternate channel to determine difference.
It is the second equilibrium with the ONU under main work PON mouthfuls because ONU sends ascending response message
Time delay as frame initial time, therefore the computing module 120 the first balanced time delay need to be subtracted this second
Balanced time delay, obtains a difference, and when determining equilibrium that the difference is the ONU under the alternate channel
Prolong.
Second sending module 130, for issuing balanced time delay to ONU by ranging time message,
So that ONU is based on balanced time delay stable operation under alternate channel.
It is equal in the case where this is standby work PON mouthfuls that computing module 120 in the OLT calculates the ONU
Delayed during weighing apparatus, the second sending module 130 in the OLT is passed through by ranging time message
Ranging_Time PLOAM message, the balanced time delay is issued to the ONU, and the ONU is equal according to this
The time delay that weighs adjusts the transmission starting point of uplink frame, so that the ONU is based on balanced time delay under the alternate channel
Stable operation.
The present embodiment is by the way that after OLT is switched to alternate channel from main channel, first in the OLT sends
Module 110 issues PLOAM authorization of messages by alternate channel to ONU, passes through in OLT standby logical
When road receives the ascending response message that ONU is sent based on PLOAM authorization of messages, in the OLT
When computing module 120 calculates equilibriums of the ONU under alternate channel based on the ascending response message received
Prolong, the second sending module 130 in the OLT and by ranging time message to ONU issue equilibrium when
Prolong, so that ONU is based on balanced time delay stable operation under alternate channel.Because the ONU is from main channel
Fault recovery wait state be switched to after the normal operating condition of alternate channel, receive OLT from standby logical
The PLOAM authorization of messages that road is issued, and send up to the OLT based on the PLOAM authorization of messages
Acknowledge PLOAM message so that the OLT calculate under the alternate channel OLT arrive this
ONU balanced time delay, the ONU receive that the OLT issues this it is balanced when delay, complete weight
Ranging so that ONU stable operations under alternate channel, hence in so that user in XG-PON systems
Business transmitting.
Further, based on the first embodiment, propose that the second of XG-PON systems of the present invention is implemented
Example, in the present embodiment, reference picture 7, the optical line terminal OLT also includes：Preserving module 140.
Preserving module 140, it is during for normally being run in main channel, ONU is second equal under main channel
Weighing apparatus time delay is saved in alternate channel.
In the present embodiment, when OLT and ONU is in main work PON mouthfuls normal operations, the OLT
In preserving module 140 by ranging obtain second balanced time delays of the ONU under main channel be saved in it is standby
In passage.
The present embodiment is by when the OLT and the ONU are normally run in main channel, the guarantor in the OLT
Second balanced time delays of the ONU under main channel is saved in alternate channel by storing module 140 so that at this
When main channel is broken down, with facilitate calculate the ONU run under alternate channel when it is accurate balanced when
Prolong, so that playing a part of XG-PON system channels switches double protections.
It is of the invention further to provide a kind of XG-PON systems again.
Reference picture 8, the fourth embodiment that Fig. 8 is ONT Optical Network Terminal ONU in XG-PON systems of the present invention
High-level schematic functional block diagram.
In the present embodiment, the ONT Optical Network Terminal ONU includes：First receiving module 210, transmission mould
Block 220, the second receiving module 230.
First receiving module 210, for being switched in ONU from the fault recovery wait state of main channel
To alternate channel normal operating condition when, receive the PLOAM message that is issued by alternate channel of OLT
Authorize；
In the present embodiment, XG-PON systems include ONT Optical Network Terminal ONU, and the ONU detects LODS
Fault recovery wait state, i.e. O6 states are switched to after (downstream signal loss), and enables a timing
Device (being set to 100ms according to standard) come detect the ONU downstream signal whether in preset time it is extensive
It is multiple, if in preset time, the ONU O6 state-detections to DSYNC downlink optical signals synchronization into
After work(, then the ONU is switched to standby work PON mouthfuls of normal operating condition, i.e. O5 states, waits
Resurvey away from.When the ONU is switched to the O5 states under standby work PON mouthfuls, in the ONU
One receiving module 210 receives OLT by this standby work PON mouthfuls PLOAM authorization of messages issued,
I.e. PLOAMu flag bits are 1 ONU OMCC bandwidth；
The sending module 220, for being sent out based on PLOAM authorization of messages under alternate channel to OLT
Ascending response message is sent, so that OLT calculates ONU standby logical based on the ascending response message received
Balanced time delay under road；
It is 1 when the first receiving module 210 in ONU receives the PLOAMu flag bits that OLT issues
ONU OMCC bandwidth when, then the sending module 220 in the ONU with work under PON mouthfuls
Two balanced time delays send up response as the frame initial time for sending ascending response message, to the OLT and disappeared
Breath, i.e., up Acknowledge PLOAM message, so that the computing module 120 in the OLT is based on
The ascending response message received calculates balanced time delays of the ONU under standby work PON mouthfuls.
Second receiving module 230, for ONU receive OLT by ranging time message issue it is equal
Weigh time delay, and according to the stable operation under alternate channel of balanced time delay.
After the ascending response message that OLT receives ONU transmissions, the computing module 120 in the OLT
Balanced time delays of the ONU in the case where this is standby work PON mouthfuls is calculated, and calls second in the OLT to send out
Send module 130 that the balanced time delay calculated is passed through into ranging time message, i.e. Ranging_Time PLOAM
Message, is handed down to the ONU.The second receiving module 230 in the ONU receives the OLT and passed through
Delayed during the equilibrium that ranging time message is issued, the ONU adjusts the transmission of uplink frame according to the balanced time delay
Starting point, so as to the stable operation in the case where this is standby PON mouthfuls.
The present embodiment from the fault recovery wait state of main channel in ONU by being switched to alternate channel
During normal operating condition, the first receiving module 210 in the ONU receives OLT and passed through under alternate channel
The PLOAM authorization of messages of hair, and call the sending module 220 in ONU to be based on the PLOAM message
Authorize under alternate channel to OLT send ascending response message so that OLT based on receive it is up should
Answer message and calculate balanced time delays of the ONU under alternate channel, the second receiving module 230 in the ONU
It is delayed during the equilibrium that reception OLT is issued by ranging time message, the ONU is according to balanced time delay standby
With stable operation under passage so that in XG-PON systems user business transmitting.
Further, based on the fourth embodiment, propose that the 5th of XG-PON systems of the present invention implements
Example, in the present embodiment, reference picture 9, the sending module 220 include acquiring unit 221, send single
Member 222.
The acquiring unit 221, using the second balanced time delay as during the frame starting for sending ascending response message
Carve；
The transmitting element 222, for sending ascending response message to OLT based on frame initial time.
In the present embodiment, the ONU that the PLOAMu flag bits that OLT issues are 1 is received in ONU
During OMCC bandwidth, then the acquiring unit 221 regard the second balanced time delay as transmission ascending response message
Frame initial time, and notify transmitting element 222 to send the up Acknowledge to the OLT
PLOAM message.
The present embodiment by using the second balanced time delay as the frame initial time for sending ascending response message, and
Ascending response message is sent to OLT based on frame initial time so that the OLT can accurately calculate this
Balanced time delays of the ONU under alternate channel.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every
The equivalent structure or equivalent flow conversion made using description of the invention and accompanying drawing content, or directly or
Connect and be used in other related technical fields, be included within the scope of the present invention.
Claims (10)
1. channel switching resurveys away from control method in a kind of XG-PON systems, it is characterised in that institute
State the ONT Optical Network Terminal ONU in XG-PON systems and the main channel or standby of optical line terminal OLT
Passage is connected, and the described method comprises the following steps：
After the OLT is switched to the alternate channel from the main channel, the OLT passes through described
Alternate channel issues physical layer operations management to the ONU and safeguards PLOAM authorization of messages；
The ONU is received by the alternate channel in the OLT and is based on the PLOAM message
When authorizing the ascending response message sent, the OLT is calculated based on the ascending response message received
Balanced time delays of the ONU under the alternate channel；
The OLT issues the balanced time delay by ranging time message to the ONU, so that described
ONU is based on balanced time delay stable operation under the alternate channel.
2. channel switching is resurveyed away from control method in XG-PON systems as claimed in claim 1,
Characterized in that, the OLT calculates the ONU in institute based on the ascending response message received
The step of stating the balanced time delay under alternate channel includes：
The of the ONU under the alternate channel is calculated based on the ascending response message that receives
One balanced time delay, and obtain second balanced time delays of the ONU preserved under the main channel；
The difference of the described first balanced time delay time delay balanced with described second is calculated, and determines that the difference is
Balanced time delays of the ONU under the alternate channel.
3. channel switching is resurveyed away from control method in XG-PON systems as claimed in claim 2,
Characterized in that, described after OLT is switched to the alternate channel from the main channel, the OLT
By the alternate channel to the ONU issue PLOAM authorization of messages the step of before also include：
When normally being run in the main channel, by the ONU under the main channel second it is balanced when
Prolong and be saved in the alternate channel.
4. channel switching resurveys away from control method in a kind of XG-PON systems, it is characterised in that institute
State the ONT Optical Network Terminal ONU in XG-PON systems and the main channel or standby of optical line terminal OLT
Passage is connected, and the described method comprises the following steps：
In the ONU alternate channel is switched to from the fault recovery wait state of the main channel
During normal operating condition, the ONU receives the PLOAM that the OLT is issued by the alternate channel
Authorization of messages；
The ONU is based on the PLOAM and authorized under the alternate channel in the OLT transmissions
Row response message, so that the OLT calculates the ONU based on the ascending response message received
Balanced time delay under the alternate channel；
The ONU receives the balanced time delay that the OLT is issued by ranging time message, and root
According to balanced time delay stable operation under the alternate channel.
5. channel switching is resurveyed away from control method in XG-PON systems as claimed in claim 4,
Characterized in that, the ONU is based on the PLOAM authorization of messages under the alternate channel to institute
Stating the step of OLT sends ascending response message includes：
It regard the described second balanced time delay as the frame initial time for sending the ascending response message；
Ascending response message is sent to the OLT based on the frame initial time.
6. a kind of XG-PON systems, it is characterised in that including：ONT Optical Network Terminal ONU and optical link
Terminal OLT, the ONT Optical Network Terminal ONU and optical line terminal OLT main channel or alternate channel
Connection；Wherein, the optical line terminal OLT includes：
First sending module, for after the OLT is switched to the alternate channel from the main channel,
Physical layer operations management is issued to the ONU by the alternate channel and safeguards that PLOAM message is awarded
Power；
Computing module, institute is based on for receiving the ONU by the alternate channel in the OLT
State PLOAM authorization of messages transmission the ascending response message when, based on receive it is described it is up should
Answer message and calculate balanced time delays of the ONU under the alternate channel；
Second sending module, for by ranging time message to the ONU issue it is described balanced when
Prolong, so that the ONU is based on balanced time delay stable operation under the alternate channel.
7. XG-PON systems as claimed in claim 6, it is characterised in that the computing module is also
For：
The of the ONU under the alternate channel is calculated based on the ascending response message that receives
One balanced time delay, and obtain second balanced time delays of the ONU under the main channel；
The difference of the described first balanced time delay time delay balanced with described second is calculated, and determines that the difference is
Balanced time delays of the ONU under the alternate channel.
8. XG-PON systems as claimed in claim 7, it is characterised in that the optical line terminal
OLT also includes：
Preserving module, during for normally being run in the main channel, by the ONU in the main channel
Under the second balanced time delay be saved in the alternate channel.
9. a kind of XG-PON systems, it is characterised in that including：ONT Optical Network Terminal ONU and optical link
ONT Optical Network Terminal ONU's and optical line terminal OLT in terminal OLT, the passive optical network
Main channel or alternate channel connection；Wherein, the ONT Optical Network Terminal ONU includes：
First receiving module, for being fallen in the ONU from the fault recovery wait state of the main channel
When changing to the normal operating condition of the alternate channel, receive the OLT and issued by the alternate channel
PLOAM authorization of messages；
Sending module, for based on the PLOAM authorization of messages under the alternate channel to described
OLT sends ascending response message, so that the OLT is based on receiving the ascending response message calculating institute
State balanced time delays of the ONU under the alternate channel；
Second receiving module, for receive the OLT by ranging time message issue it is described balanced when
Prolong, and according to balanced time delay stable operation under the alternate channel.
10. XG-PON systems as claimed in claim 9, it is characterised in that the sending module bag
Include：
It regard the described second balanced time delay as the frame initial time for sending the ascending response message；
Transmitting element, for sending ascending response message to the OLT based on the frame initial time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610182579.7A CN107241138B (en) | 2016-03-28 | 2016-03-28 | XG-PON system and re-ranging control method for channel switching thereof |
| PCT/CN2016/086737 WO2017166454A1 (en) | 2016-03-28 | 2016-06-22 | Xg-pon system and channel switching re-ranging control method therefor |
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| CN201610182579.7A CN107241138B (en) | 2016-03-28 | 2016-03-28 | XG-PON system and re-ranging control method for channel switching thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011144110A2 (en) * | 2011-05-27 | 2011-11-24 | 华为技术有限公司 | Method, system and device for communication in the optical network system |
| CN102598587A (en) * | 2011-11-03 | 2012-07-18 | 华为技术有限公司 | Method for protecting communication and devices for the same |
| US20130232265A1 (en) * | 2010-10-27 | 2013-09-05 | France Telecom | Processing of data for the management of placement on standby |
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| CN101783975B (en) * | 2009-01-16 | 2013-06-12 | 华为技术有限公司 | Method, device and system for measuring distance in communication network |
| CN102026048A (en) * | 2009-09-23 | 2011-04-20 | 中兴通讯股份有限公司 | Method for adjusting ranging value of passive optical network system and recovering passive optical network system, and optical line terminal |
| CN102075238B (en) * | 2010-12-02 | 2015-04-01 | 中兴通讯股份有限公司 | Passive optical network and protection switching method thereof |
| CN104506972B (en) * | 2015-01-07 | 2018-02-13 | 烽火通信科技股份有限公司 | The fast ranging method that a kind of XGPON system protections are switched |
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- 2016-06-22 WO PCT/CN2016/086737 patent/WO2017166454A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130232265A1 (en) * | 2010-10-27 | 2013-09-05 | France Telecom | Processing of data for the management of placement on standby |
| WO2011144110A2 (en) * | 2011-05-27 | 2011-11-24 | 华为技术有限公司 | Method, system and device for communication in the optical network system |
| CN102598587A (en) * | 2011-11-03 | 2012-07-18 | 华为技术有限公司 | Method for protecting communication and devices for the same |
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