CN108882062A - A kind of passive optical network asymmetric system and its management method - Google Patents
A kind of passive optical network asymmetric system and its management method Download PDFInfo
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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
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
- H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0272—Transmission of OAMP information
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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
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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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
- H04Q11/0062—Network aspects
- H04Q2011/0086—Network resource allocation, dimensioning or optimisation
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Abstract
A kind of passive optical network asymmetric system and its management method, it is related to passive optical network technique field, system includes optical line terminal OLT, Optical Distribution Network ODN and multiple optical network unit ONUs, multiple ONU are all made of time division multiplexing mode and are connected by ODN with OLT, and the ONU supports the data feedback channel an of wavelength and the down going channel of multiple wavelength；The OLT supports the data feedback channel of at least one wavelength and the down going channel of at least two wavelength；The system promotes downlink bandwidth by increasing down going channel quantity, and upstream bandwidth is remained unchanged or promoted by Single wavelength channel rate.On the basis of this system structure, a kind of management method is provided, system is allowed normally to run, safeguard.The present invention can reduce the difficulty for promoting network bandwidth, reduce the cost for promoting network bandwidth.
Description
Technical field
The present invention relates to passive optical network technique fields, and in particular to a kind of passive optical network asymmetric system and its management
Method.
Background technique
With the application of the new business such as the development of 5G mobile communication and 4K/8K, user is growing to bandwidth demand, makees
It needs for the soft exchange passive optical network (Passive Optical Network, PON) of soft exchange " last one kilometer " to existing
PON network carry out bandwidth upgrading.At present PON system mainly by optical line terminal (Optical Line Terminal, OLT),
Optical Distribution Network (Optical Distribution Network, ODN) and optical network unit (Optical Network
Unit, ONU) composition, the transmission that downlink uses broadcast mode, uplink that time division multiplexing mode (TDM) is used to carry out signal, and uplink
Operation wavelength with downlink be it is pairs of, i.e., uplink is identical as the operation wavelength quantity of downlink.
Currently, there are mainly two ways for PON network bandwidth upgrading, first is that increasing wavelength channel quantity, second is that promoting unicast
Long-channel rate.Increasing uplink and downlink wavelength channel number undoubtedly needs more wavelength resources simultaneously.Due to dispersion in all wave bands
It is all smaller with being lost, and two are only existed without device technology promotion, the data feedback channel for being suitble to PON network to carry out data transmission
Wavelength window, so uplink and downlink increases wavelength channel quantity simultaneously brings great difficulty to transmission, the access network system.In addition,
Uplink and downlink wavelength channel increases simultaneously, also increases the construction O&M cost of system design difficulty and network.It is logical to promote Single wavelength
Also more stringent requirements are proposed in terms of bandwidth, isolation for sun adjuster part and electrical chip for the PON network upgrade method of road rate,
The technical difficulty and development cost of realization are increased, current device technology maturity is also difficult to reach.Due to PON network at
This is more sensitive, and require it is shared with existing ODN, so being also contemplated that network while optical access network bandwidth upgrading
Economy.
Therefore, how low cost promotion network bandwidth and can be carried out system administration, O&M is one of urgent need to resolve
Problem.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of passive optical network asymmetric systems
And its management method, down direction by increase wavelength channel quantity promoted bandwidth, up direction can remain unchanged or into
Row speed upgrade promotes bandwidth, reduces the difficulty for promoting network bandwidth, reduces the cost for promoting network bandwidth.
To achieve the above objectives, the present invention takes a kind of passive optical network asymmetric system, including optical line terminal OLT,
Optical Distribution Network ODN and multiple optical network unit ONUs, the multiple ONU are all made of time division multiplexing mode and pass through ODN and OLT phase
Even, the OLT supports at least one upstream wavelength channel and at least two downstream wavelength channels；The ONU supports a uplink
Wavelength channel and at least one downstream wavelength channel；The system promotes downlink bandwidth by increasing downstream wavelength number of channels,
Upstream bandwidth is remained unchanged or is promoted by Single wavelength channel rate.
Based on the above technical solution, the OLT includes that the first MAC and Logic control module, dual rate filter mould
Block and OLT optical module；
Down direction, the first MAC and Logic control module are controlled for link, network side data are transferred to described
OLT optical module, the OLT optical module are used to the data becoming optical signal multiplex in single mode optical fiber；
Up direction, the OLT optical module is for receiving the optical signal from single mode optical fiber, the dual rate filter module
For that will carry out rate separation from the optical signal of OLT optical module, the first MAC and Logic control module are used for will be described double
The uplink signal transmissions of rate filter module separation are to network side.
Based on the above technical solution, the OLT optical module includes：
OLT output unit, quantity at least two, for receiving the downlink from the first MAC and Logic control module
Signal；
WDM unit is used for downlink signal multiplex into a single mode optical fiber, and being also used to will be from the upper of single mode optical fiber
The outflow of row signal partial wave；
OLT receiving unit, quantity is at least one, for the signal from WDM unit to be transferred to the dual rate
Filter module.
Based on the above technical solution, the ONU includes：
ONU receiving unit, quantity is at least one, for receiving the downlink signal from the ODN；
2nd MAC and Logic control module are used for link control, and the received optical signal of the ONU receiving unit is passed
It is defeated to arrive upper layer application；
ONU output unit, quantity is one, for the signal from the 2nd MAC and Logic control module to be transmitted to
The ODN.
Based on the above technical solution, in the side OLT, multiple downstream wavelength channels and the conduct of single upstream wavelength channel
One port OLT is supplied to owning in the port OLT using unique time clock source, and by the time clock source
Downstream wavelength channel.
The present invention also provides a kind of management methods of passive optical network asymmetric system, including：
The transmission wavelength in OLT period declares that message, wavelength declare message comprising in all downstream wavelength channels in system
Cardiac wave is long and channel position, ONU declare the corresponding channel position of message accounting according to the wavelength received, and according to message
Interior central wavelength corrects the reception wavelength centre frequency of itself；
OLT has found that bandwidth authorizing message, the ONU of not registered state respond institute to the transmission of all downstream wavelength channel periods
Discovery bandwidth authorizing message is stated, the loop time delay in corresponding wavelength channel is obtained, it is login state that corresponding downstream wavelength channel, which is arranged,；
Wherein, when the loop time delay in corresponding wavelength channel is the loop in+one downstream wavelength channel in a upstream wavelength channel in ONU
Prolong, is considered as the loop time delay of a wavelength channel.
Based on the above technical solution, the wavelength channel of all supports of ONU under original state both is set to non-
Login state；When an ONU all wavelengths channel within a certain period of time all in login state when, the ONU enters work shape
State；Otherwise, when be more than it is described resetting ONU all wavelengths channel is not registered state after a certain period of time, restart the note of ONU
Volume process.
Based on the above technical solution, the OLT awards the transmission discovery bandwidth of all downstream wavelength channel periods
When weighing message, not registered state ONU receives the discovery bandwidth authorizing message and responds；Login state ONU receives the discovery
Bandwidth authorizing message is not responding to；Wherein, all wavelengths channel of login state ONU is login state.
Based on the above technical solution, the discovery bandwidth authorizing message includes system time t1, the OLT hair of OLT
After sending discovery bandwidth authorizing message, opens uplink and find window；The ONU reception bandwidth entitlement message of not registered state extracts institute
System time of the system time t1 of OLT as the time of reception ONU is stated, and reports self-ability report in the windowing time slot of OLT
Text.
Based on the above technical solution, the self-ability message include ONU support downstream wavelength number of channels,
And the channel position in the downstream wavelength channel specifically supported；While ONU reports self-ability message, the self-ability is marked
The channel position in the reception downstream wavelength channel of message；And the ONU system time t2 for reporting the moment is inserted as time list notation
Enter in the self-ability message.
Based on the above technical solution, the OLT receives the self-ability message of ONU, calculates and corresponds to wave in ONU
The loop time delay of long-channel is simultaneously sent to the ONU；After the ONU receives the loop time delay, corresponding downstream wavelength channel is set
It is set to login state.
Based on the above technical solution, in the ONU, the calculation method of the loop time delay of wavelength channel is：OLT note
Record receives the OLT system time t3 of ONU self-ability message, and the ONU system is extracted in ONU self-ability message
The loop time delay in corresponding wavelength channel in the ONU is calculated by t3-t2 by time t2.
Based on the above technical solution, wavelength declares message tuning wavelength centre frequency to the ONU based on the received
Process include：The ONU declares message according to downstream wavelength channel reception wavelength, and the system centre wavelength that oneself is arranged is corresponding
Channel position, save as system wavelength information；When being received again by wavelength declaration message, compare and previously stored system wave
Whether long message is consistent, if so, being not processed；If it is not, updating local system wavelength with newest wavelength declaration message
Information.
The beneficial effects of the present invention are：
1, the present invention promotes bandwidth by increasing down direction wavelength channel, and up direction can keep original system not
Change, or speed upgrade can be carried out to original wavelength；Or OLT supports more upstream wavelengths, but ONU supports different lists
One upstream wavelength promotes bandwidth, reduces the difficulty for promoting network bandwidth, reduces the cost for promoting network bandwidth.
2, the present invention can completely compatible existing system structure, provide higher downlink system bandwidth for user, make ONU
Downstream wavelength resource it is more flexible, the flexible configuration of business can be realized under one or more down going channels, is provided a variety of
The possibility of business service.In up direction, according to user demand, system supports the user side equipment of existing bandwidth uplink, also props up
Hold the user equipment of the upstream bandwidth of higher rate.
3, in passive optical network asymmetric system of the invention, OLT has multiple down direction wavelength channels, up direction
Wavelength channel can be one, be also possible to multiple；When with multiple up direction wavelength channels, it can be considered as multiple passive
It is wider to be applicable in scene for the simple superposition of optical-fiber network asymmetric system.
Detailed description of the invention
Fig. 1 is third embodiment of the invention passive optical network asymmetric system schematic diagram；
Fig. 2 is fourth embodiment of the invention passive optical network asymmetric system schematic diagram；
Fig. 3 is the management flow chart of seventh embodiment of the invention passive optical network asymmetric system.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
First embodiment
Passive optical network asymmetric system of the present invention, including OLT, ODN and multiple ONU, multiple ONU are all made of time division multiplexing
Mode is connected by ODN with OLT.OLT supports at least one upstream wavelength channel and at least two downstream wavelength channels；ONU branch
A upstream wavelength channel is held, also supports at least one downstream wavelength channel.
In down direction, multiple wavelength are synthesized in a single mode optical fiber by OLT by way of wavelength-division multiplex；In uplink
Direction, OLT support original upstream wavelength channel.The system promotes downlink bandwidth, uplink by increasing down going channel quantity
Bandwidth can remain unchanged, or be promoted by Single wavelength channel rate.
Further, in the side OLT, multiple downstream wavelength channels and single upstream wavelength channel are adopted as a port OLT
With unique time clock source, and the time clock source is supplied to all downstream wavelength channels in the port OLT, protected
Demonstrate,prove the uniqueness of system time.Wherein, time clock source can be locally generated by system, can also be introduced by external network.
Second embodiment
On the basis of first embodiment, OLT include the first media access control (Media Access Control,
MAC) with Logic control module, dual rate filtering (Dual-rate filter) module and OLT optical module, wherein the first MAC with
Logic control module is for completing link control function.The principle of dual rate filter module is：Different rates are synchronized to isolate
The signal of different rates because passive optical network it is current rate interval it is larger, such as 1G and 10G or 2.5G and 10G is used
Filter is easy to accomplish.
In down direction, the first MAC and Logic control module are used to network side data being transferred to OLT optical module；OLT light
Module is used to network side data becoming optical signal, and multiplex, on a single mode optical fiber, optical signal is transferred to user via ODN
Side apparatus ONU.
In up direction, OLT optical module is used to receive the optical signal from ONU by single mode optical fiber；The dual rate filter
Wave module for will from the signal of OLT optical module carry out rate separation, that is, by the ONU uplink signal of existing rate with it is higher
The uplink signal of rate separates.First MAC is passed with the uplink signal that Logic control module is used to separate dual rate filter module
It is defeated by network side.
3rd embodiment：
As shown in Figure 1, OLT includes the first MAC and Logic control module, dual rate filter module and OLT in the present embodiment
Optical module, the connection relationship and function of each module are identical as second embodiment.
More specifically, OLT optical module includes WDM (Wavelength Division Multiplexing, wavelength-division multiplex)
Unit, an OLT receiving unit and two OLT output units, in other embodiments, OLT can also be that multiple OLT outputs are single
Member.
ONU includes one for controlling the 2nd MAC and Logic control module of link, further includes an ONU output unit
With at least one ONU receiving unit.Different by the number of ONU receiving unit, ONU down direction can both support that Single wavelength was logical
Road can also support multi-wavelength channel.In the present embodiment, support that ONU and one of unicast long-channel is supported two comprising two
The ONU of a wavelength channel.
Down direction, OLT output unit is for receiving the downlink signal from the first MAC and Logic control module.WDM is mono-
Member for will the downlink signal wave from different OLT output units into a single mode optical fiber, be transferred to ONU via ODN.Respectively
ONU passes through the optical signal that ONU receiving unit receives oneself wavelength channel respectively, is transmitted by the 2nd MAC and Logic control module
To upper layer application, the transmission of downlink data is completed.
Up direction, twoth MAC and Logic control module of the data of user by each ONU complete link control function,
It is transferred to ODN by ONU output unit, then is transferred to WDM unit via single mode optical fiber.Uplink signal is passed through OLT by WDM unit
Receiving unit is transferred to dual rate filter module and carries out rate separation, then reaches network by the first MAC and Logic control module
Side.
As shown in Figure 1, specifically, the OLT receiving unit of OLT optical module be 1, the upstream wavelength λ of correspondence system；OLT
Output unit is two, respectively OLT output unit 1 and OLT output unit 2, respectively corresponds the downstream wavelength λ of system1With under
Row wavelength X2.In multiple ONU (ONU1, ONU2 ..., ONUn), ONU1 supports downstream wavelength λ1Channel, ONU2 support down going wave
Long λ2Channel, ONUn support downstream wavelength λ1With downstream wavelength λ2Two wavelength channels.In the present embodiment, wavelength X 1270nm,
Wavelength X1For 1490nm, wavelength X2For 1577nm.
Fourth embodiment：
As shown in Fig. 2, OLT optical module includes WDM unit, two OLT receiving units and two OLT defeated in the present embodiment
Unit out, in other embodiments, OLT optical module can also include multiple OLT receiving units and multiple OLT output units.Tool
Body, two OLT receiving units are respectively OLT receiving unit 1 and OLT receiving unit 2, send downstream wavelength λ respectively1And downlink
Wavelength X2.Two OLT receiving units are respectively OLT receiving unit 1 and OLT receiving unit 2, receive upstream wavelength λ respectivelyaWith under
Row wavelength Xb。
ONU includes one for controlling the 2nd MAC and Logic control module of link, further includes an ONU output unit
With at least one ONU receiving unit.Specifically, ONU1, ONU2, ONU3 and ONU4 include an ONU output unit and one
ONU receiving unit.Wherein, ONU1 supports downstream wavelength λ1Channel and upstream wavelength λaChannel；ONU2 supports downstream wavelength λ2Channel
With upstream wavelength λaChannel；ONU3 supports downstream wavelength λ1Channel and upstream wavelength λbChannel；ONU4 supports downstream wavelength λ2Channel
With upstream wavelength λbChannel.ONUn supports downstream wavelength λ1With downstream wavelength λ2Two wavelength channels support upstream wavelength λbIt is logical
Road.In the present embodiment, wavelength XaFor 1270nm, wavelength XbFor 1310nm, wavelength X1For 1490nm, wavelength X2For 1577nm.
Down direction, OLT output unit 1 and OLT output unit 2 are used to receive from the first MAC and logic control mould
The downlink signal of block.WDM unit for will the downlink signal wave from different OLT output units into a single mode optical fiber, warp
ONU is transferred to by ODN.Each ONU passes through the optical signal that ONU receiving unit receives oneself wavelength channel respectively, then passes through each ONU's
2nd MAC and Logic control module are transferred to upper layer application, complete the transmission of downlink data.
Up direction, twoth MAC and Logic control module of the data of user by each ONU complete link control function,
It is transferred to ODN by the ONU output unit of same ONU, then is transferred to WDM unit via single mode optical fiber.WDM unit is by uplink signal
Partial wave is transferred to dual rate filter module by OLT receiving unit 1 and OLT receiving unit 2 and carries out speed to respective receiving module
Rate separation, then network side is reached by the first MAC and Logic control module.
5th embodiment：
A kind of management method of passive optical network asymmetric system, including step：
The transmission system channel information in OLT period, to the wavelength and serial number information in all user equipment broadcast systems channel.
ONU receives system channel information, confirms the channel position oneself supported.Wherein, system channel information is a series of messages, including
Wavelength declares that message, wavelength declare that message includes the central wavelength and channel position in all downstream wavelength channels in system.Initially
The wavelength channel of all supports of ONU under state is both configured to not registered state, and ONU remembers according to the wavelength declaration message received
Corresponding downstream wavelength channel position is recorded, and corrects the reception wavelength centre frequency of itself according to the central wavelength in message.
OLT has found bandwidth authorizing message to the transmission of all downstream wavelength channel periods, finds to wrap in bandwidth authorizing message
System time containing OLT.For supporting that the ONU of multi-wavelength down going channel, login state and not registered state are logical to each wavelength
The downstream wavelength channel that road is supported is independent, the only downstream wavelength channel of the not registered state discovery band that just responds OLT
The discovery bandwidth authorizing message of wide entitlement message, the downstream wavelength channel reception in login state to OLT is not responding to.It is non-registered
The ONU response discovery bandwidth authorizing message of state, obtains loop time delay (the Round Trip in corresponding wavelength channel in ONU
Time, RTT), it is login state that corresponding downstream wavelength channel is arranged accordingly.Wherein, in ONU wavelength channel loop time delay,
The loop time delay for referring to+one corresponding downstream wavelength channel in a upstream wavelength channel in the ONU, as a wavelength in ONU
The loop time delay in channel.
Sixth embodiment：
The present embodiment is essentially identical with fourth embodiment, more specifically：Under all in passive optical network asymmetric system
Traveling wave long-channel periodically sends discovery bandwidth authorizing message, and OLT opens uplink and finds window.
When the ONU of not registered state receives discovery bandwidth authorizing message, OLT system is extracted from discovery bandwidth authorizing message
Time t1, the system time as this ONU of the time of reception.Because the system time in all downstream wavelength channels is homologous in system,
So the OLT system time received from multiple wavelength channels is also consistent even if supporting the ONU of multi-wavelength down going channel
's.In the windowing time slot that OLT is specified, ONU reports self-ability message, using the ONU system time t2 of sending instant as the time
List notation is inserted into the self-ability message, and the self-ability message is comprising the ONU downstream wavelength port number supported and specifically
The channel position of the downlink of support, while the self-ability message being marked to receive downstream wavelength channel position.
OLT receives the self-ability message of ONU, calculates the loop time delay in corresponding wavelength channel in the ONU, and will meter
The loop time delay of calculating is sent to ONU in the form of message.Wherein, to the ONU for supporting unicast long-channel, due on only one
Traveling wave long-channel and a downstream wavelength channel, the loop time delay of calculated wavelength channel is the loop time delay of the ONU.It is right
Support multi-wavelength channel ONU because downstream wavelength channel have it is multiple, then a corresponding downlink in+one, upstream wavelength channel
There are many situations for wavelength channel.Calculated loop time delay at this time is that the downstream wavelength marked in ONU self-ability message is led to
The loop time delay for the wavelength channel that road+upstream wavelength channel is formed.Also, for the ONU in multi-wavelength channel, ONU
Loop time delay, the loop time delay including all wavelengths channel in the ONU.ONU receives the loop time delay message from OLT,
According to the loop time delay in corresponding wavelength channel, login state is set by the state in the downstream wavelength channel in the wavelength channel.
Within a certain period of time, when ONU all wavelength channels are all in login state, ONU enters working condition, in OLT
Specified time slot sends uplink business data, at the same time it can also receive the downlink service data of down going channel.Otherwise, when being more than
After a certain period of time, even there is a wavelength channel to be not at login state, requiring resetting ONU all wavelengths channel is non-note
Volume state, restarts the registration management process of ONU.
7th embodiment：
As shown in figure 3, the management method of passive optical network asymmetric system is specific to wrap on the basis of five embodiments
Include following steps：
S101.OLT periodically sends wavelength in all downstream wavelength channels with broadcast mode and declares message comprising is
All downstream wavelength numbers of channels, the central wavelength in downstream wavelength channel and corresponding channel position in system.Referring to Fig. 1
And 3rd embodiment, downstream wavelength channel has two in corresponding wavelength declaration message, a wavelength channel serial number 1, wherein
The long 1490nm of cardiac wave；Another wavelength channel serial number 2, central wavelength 1577nm.
S102. the wavelength channel of all supports of ONU under original state is not registered state.ONU reception is supported logical
The wavelength that road is sent declares message, and extracts system wavelength information, corresponding channel position is recorded, according to the central wavelength in message
Correct the reception wavelength centre frequency of itself.
Such as：Declare message referring to the wavelength that Fig. 1, ONU1 receive the transmission of channel position 1, it is local in ONU1, ONU1 pairs
Answering central wavelength 1490nm is channel position 1, proofreads the optical module of ONU1 oneself, it is made to receive spirit in 1490nm wave-length coverage
Sensitivity highest.Two downstream wavelength channels are supported with ONUn, both can receive the wavelength declaration message of the transmission of channel position 1,
Also it can receive the wavelength declaration message of the transmission of channel position 2.Because wavelength declares message all wavelengths channel in system
Be it is identical, the ONUn declares message according to downstream wavelength channel reception wavelength, and the system centre wavelength that oneself is arranged is corresponding
Channel position, save as system wavelength information.Such as：The system centre wavelength 1490nm that oneself is arranged in ONUn is channel position
1, system centre wavelength 1577nm are channel position 2, while ONUn proofreads the optical module of oneself.
For be received again by wavelength declaration message, compare it is whether consistent with previously stored system wavelength information, if so,
It is not processed；If not, updating local system wavelength information with newest wavelength declaration message.
S103.OLT has found bandwidth authorizing message to the transmission of all downstream wavelength channel periods, and it is logical that notice accesses the wavelength
All ONU in road, OLT mark the system time t1 and ONU of discovery bandwidth authorizing message sending instant OLT that can carry out
The time slot that uplink message is sent.
S104.ONU receives the discovery bandwidth authorizing message of broadcast mode, and local whether there is of detection first has system wave
Long message, and corresponding wavelength channel is in not registered state, if so, into S105；If it is not, being not processed, terminate process.
S105. the ONU of not registered state receives discovery bandwidth authorizing message, extracts the system time t1 conduct of wherein OLT
The system time of the time of reception ONU, and self-ability message is reported in the windowing time slot of OLT.
Illustrate treatment process by taking ONUn as an example, ONUn is from the downstream wavelength channel reception of serial number j to discovery bandwidth authorizing report
Text, it is assumed that j=1.ONUn checks the system wavelength information locally saved, corresponding wavelength λ1The serial number 1 in channel, and serial number 1
Wavelength channel be in not registered state, then ONUn extract discovery bandwidth authorizing message in OLT system time t1, by the OLT
System time t1 is set as the system time of ONU.ONUn sends itself of ONUn in the specified time slot of discovery bandwidth authorizing message
Ability message, OLT calculate the loop time delay for passing through the wavelength channel using the self-ability message.Self-ability message content packet
The wavelength channel serial number quantity and corresponding channel position, ONUn for including ONU support support 2 two wavelength channels of λ 1 and λ, correspond to
Channel position be 1 and 2.Mark the message response in the self-ability message is that the discovery bandwidth that channel position 1 is sent is awarded
Message is weighed, and is inserted into the ONU system time t2 of sending instant in self-ability message.
After S106.OLT receives ONU self-ability message, record receives the OLT system time of the self-ability message
T3 extracts downstream wavelength channel position 1 and ONU system time t2 in the self-ability message, correspondence is calculated by t3-t2
Loop time delay message is sent to corresponding by the loop time delay of wavelength channel, OLT at corresponding downstream wavelength channel (channel position 1)
ONUn.Wherein, the loop time delay in corresponding wavelength channel refers in the ONU, a corresponding down going wave in+one, upstream wavelength channel
The loop time delay of long-channel, such as in ONUn, there is a wavelength in upstream wavelength channel+support wavelength X 1 downstream wavelength channel
The loop time delay in channel；Similarly, also there is a wavelength in upstream wavelength channel+support wavelength X 2 downstream wavelength channel in ONUn
The loop time delay in channel；The loop time delay of the two wavelength channels is exactly the loop time delay of ONUn.
S107.ONUn receives loop time delay message by downstream wavelength channel (channel position 1), saves loop time delay
Value, while login state, and synchronous opening timing device T1 are set by the downstream wavelength channel of channel position 1.
S108. within the time of timer T1 setting, whether all wavelengths channel for checking that ONU is supported is in registration shape
State, if it is not, into S109；If so, into S110.
S109.ONU all wavelengths channel is set as unregistered state, is transferred to S102.
S110. Off Timer T1, ONU enter working condition, can be normally carried out upstream data and downlink data receipts,
Hair.
In above-described embodiment, OLT receiving unit is not limited to one or two in OLT optical module, is also possible to more
A, when having multiple OLT receiving units, principle is remained unchanged.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (13)
1. a kind of passive optical network asymmetric system, including optical line terminal OLT, Optical Distribution Network ODN and multiple optical-fiber network lists
First ONU, the multiple ONU are all made of time division multiplexing mode and are connected by ODN with OLT, it is characterised in that：
The OLT supports at least one upstream wavelength channel and at least two downstream wavelength channels；
The ONU supports a upstream wavelength channel and at least one downstream wavelength channel；
The system promotes downlink bandwidth by increasing downstream wavelength number of channels, and upstream bandwidth remains unchanged or pass through unicast
Long-channel rate is promoted.
2. passive optical network asymmetric system as described in claim 1, it is characterised in that：
The OLT includes the first MAC and Logic control module, dual rate filter module and OLT optical module；
Down direction, the first MAC and Logic control module are controlled for link, and network side data is transferred to the OLT
Optical module, the OLT optical module are used to the data becoming optical signal multiplex in single mode optical fiber；
Up direction, for receiving the optical signal from single mode optical fiber, the dual rate filter module is used for the OLT optical module
Rate separation will be carried out from the optical signal of OLT optical module, the first MAC and Logic control module are used for the dual rate
The uplink signal transmissions of filter module separation are to network side.
3. passive optical network asymmetric system as claimed in claim 2, which is characterized in that the OLT optical module includes：
OLT output unit, quantity at least two, for receiving the downlink signal from the first MAC and Logic control module；
WDM unit is used for downlink signal multiplex into a single mode optical fiber, is also used to believe from the uplink of single mode optical fiber
The outflow of number partial wave；
OLT receiving unit, quantity are at least one, are filtered for the signal from WDM unit to be transferred to the dual rate
Module.
4. passive optical network asymmetric system as claimed in claim 3, which is characterized in that the ONU includes：
ONU receiving unit, quantity is at least one, for receiving the downlink signal from the ODN；
2nd MAC and Logic control module are used for link control, and the received optical signal transmission of ONU receiving unit is arrived
Upper layer application；
ONU output unit, quantity are one, described for the signal from the 2nd MAC and Logic control module to be transmitted to
ODN。
5. passive optical network asymmetric system as described in claim 1, it is characterised in that：In the side OLT, multiple downstream wavelengths are logical
Road and single upstream wavelength channel are mentioned as a port OLT using unique time clock source, and by the time clock source
Supply all downstream wavelength channels in the port OLT.
6. a kind of management method based on passive optical network asymmetric system described in claim 1, which is characterized in that including：
The transmission wavelength in OLT period declares that message, wavelength declare that message includes the middle cardiac wave in all downstream wavelength channels in system
Long and channel position, ONU declare the corresponding channel position of message accounting according to the wavelength received, and according in message
Central wavelength corrects the reception wavelength centre frequency of itself；
OLT has found that bandwidth authorizing message, the ONU of not registered state respond the hair to the transmission of all downstream wavelength channel periods
Existing bandwidth authorizing message, obtains the loop time delay in corresponding wavelength channel, and it is login state that corresponding downstream wavelength channel, which is arranged,；Its
In, the loop time delay in corresponding wavelength channel is the loop time delay in+one downstream wavelength channel in a upstream wavelength channel in ONU,
It is considered as the loop time delay of a wavelength channel.
7. the management method of passive optical network asymmetric system as claimed in claim 6, it is characterised in that：Under original state
The wavelength channel of all supports of ONU both is set to not registered state；
When an ONU all wavelengths channel within a certain period of time all in login state when, the ONU enters working condition；
Otherwise, when be more than it is described resetting ONU all wavelengths channel is not registered state after a certain period of time, restart the note of ONU
Volume process.
8. the management method of passive optical network asymmetric system as claimed in claim 6, it is characterised in that：The OLT is to institute
When having the transmission discovery bandwidth authorizing message of downstream wavelength channel period, not registered state ONU receives the discovery bandwidth authorizing
Message simultaneously responds；Login state ONU receives the discovery bandwidth authorizing message and is not responding to；
Wherein, all wavelengths channel of login state ONU is login state.
9. the management method of passive optical network asymmetric system as claimed in claim 8, it is characterised in that：The discovery bandwidth
Entitlement message includes the system time t1 of OLT, after OLT sends discovery bandwidth authorizing message, opens uplink and finds window；
The ONU reception bandwidth entitlement message of not registered state extracts the system time t1 of the OLT as the time of reception ONU
System time, and report self-ability message in the windowing time slot of OLT.
10. the management method of passive optical network asymmetric system as claimed in claim 9, it is characterised in that：Itself energy
Power message includes the channel position in the downstream wavelength number of channels that ONU is supported and the downstream wavelength channel specifically supported；
While ONU reports self-ability message, the channel position in the reception downstream wavelength channel of the self-ability message is marked；
And the ONU system time t2 at moment will be reported to be inserted into the self-ability message as time list notation.
11. the management method of passive optical network asymmetric system as claimed in claim 10, it is characterised in that：The OLT is received
To the self-ability message of ONU, calculates the loop time delay in corresponding wavelength channel in ONU and be sent to the ONU；
After the ONU receives the loop time delay, login state is set by corresponding downstream wavelength channel.
12. the management method of passive optical network asymmetric system as claimed in claim 11, which is characterized in that in the ONU,
The calculation method of the loop time delay of wavelength channel is：OLT records the OLT system time t3 for receiving ONU self-ability message, and
The ONU system time t2 is extracted in ONU self-ability message, it is logical that corresponding wavelength in the ONU is calculated by t3-t2
The loop time delay in road.
13. the management method of passive optical network asymmetric system as claimed in claim 6, which is characterized in that the ONU according to
Received wavelength declares that the process of message tuning wavelength centre frequency includes：The ONU is according to downstream wavelength channel reception wavelength
Declare message, the corresponding channel position of system centre wavelength of oneself is set, system wavelength information is saved as；When being received again by wave
When long declaration message, compare it is whether consistent with previously stored system wavelength information, if so, being not processed；If it is not, with
Newest wavelength declaration message updates local system wavelength information.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101094041A (en) * | 2006-06-23 | 2007-12-26 | 华为技术有限公司 | Method and system for upgrading passive optical network |
| CN101568046A (en) * | 2009-06-09 | 2009-10-28 | 成都优博创技术有限公司 | Method for realizing coexistence of unsymmetrical 10GEPON and GEPON optical network terminals and system thereof |
| CN102959983A (en) * | 2010-08-27 | 2013-03-06 | 华为技术有限公司 | Passive optical network and device |
| CN105338430A (en) * | 2014-08-07 | 2016-02-17 | 中兴通讯股份有限公司 | Ranging method, device and system |
| CN106506094A (en) * | 2016-12-02 | 2017-03-15 | 青岛海信宽带多媒体技术有限公司 | Optical module and optical signal receiving circuit |
| CN107302412A (en) * | 2016-04-14 | 2017-10-27 | 中兴通讯股份有限公司 | EPON framework and its method and optical network device for realizing data transfer |
| JP2017224894A (en) * | 2016-06-13 | 2017-12-21 | 日本電信電話株式会社 | Transmission control method and communication system |
-
2018
- 2018-05-29 CN CN201810532659.XA patent/CN108882062B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101094041A (en) * | 2006-06-23 | 2007-12-26 | 华为技术有限公司 | Method and system for upgrading passive optical network |
| CN101568046A (en) * | 2009-06-09 | 2009-10-28 | 成都优博创技术有限公司 | Method for realizing coexistence of unsymmetrical 10GEPON and GEPON optical network terminals and system thereof |
| CN102959983A (en) * | 2010-08-27 | 2013-03-06 | 华为技术有限公司 | Passive optical network and device |
| CN105338430A (en) * | 2014-08-07 | 2016-02-17 | 中兴通讯股份有限公司 | Ranging method, device and system |
| CN107302412A (en) * | 2016-04-14 | 2017-10-27 | 中兴通讯股份有限公司 | EPON framework and its method and optical network device for realizing data transfer |
| JP2017224894A (en) * | 2016-06-13 | 2017-12-21 | 日本電信電話株式会社 | Transmission control method and communication system |
| CN106506094A (en) * | 2016-12-02 | 2017-03-15 | 青岛海信宽带多媒体技术有限公司 | Optical module and optical signal receiving circuit |
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