CN108966054A - A kind of ONU uplink operation wavelength method of automatic configuration, ONU and system - Google Patents
A kind of ONU uplink operation wavelength method of automatic configuration, ONU and system 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
- 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
- H04Q2011/0075—Wavelength grouping or hierarchical aspects
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Abstract
A kind of ONU uplink operation wavelength method of automatic configuration, ONU and system, it is related to WR-WDM-PON access technology field, the n port of OLT is successively serial or sends the optical signal of different wave length to ONU parallel simultaneously, whether the optical signal that ONU transmission whether is received according to OLT determines the downlink working wavelength of ONU and to stop sending optical signal to ONU.After ONU receives optical signal, the PON mouth poll of ONU sends the optical signal of different wave length to OLT, if ONU cannot persistently receive the optical signal of OLT transmission, the uplink operation wavelength that can determine ONU is that the PON mouth of ONU sends the wavelength of optical signal at this time, and the PON mouth laser of ONU is sent wavelength fixed setting wavelength thus automatically.The drawbacks of bringing the invention avoids manual configuration substantially increases the convenience and flexibility of ONU O&M, reduces O&M cost, and the service fulfillment of ONU is made to become efficient.
Description
Technical field
The present invention relates to WR-WDM-PON access technology field, in particular to a kind of ONU uplink operation wavelength is automatic
Configuration method, ONU and system.
Background technique
WR-WDM-PON(Wavelength Routed-Wavelength Division Multiplexing-Passive
Optical Network, the Wave division multiplexing passive optical network of Wavelength routing) use wavelength as user terminal ONU (Optical
Network Unit, optical network unit) mark, using wavelength-division multiplex technique realize multi-upstream access, be capable of providing wider work
Make bandwidth, symmetrical broadband access truly may be implemented.At the same time it can also avoid the survey of ONU in time division multiple access technology
It many technological difficulties such as synchronizes away from, fast bit, and has a clear superiority in network management and system upgrade aspect of performance.
With advances in technology, the cost sharp fall of the cost of wavelength-division multiplex optical device especially Passive Optical Components, super quality and competitive price
WDM (Wavelength Division Multiplexing, wavelength-division multiplex) device continuously emerge, WR-WDM-PON technology will
One predictable development trend of net is accessed as PON (Passive Optical Network, passive optical-fiber network).
5G network research at present has formed first wave tide, into technical standard research and the crucial rank of research and development test
Section.Relative to 4G technology, 5G network performance in terms of throughput, time delay, connection is obviously improved, while to forward pass net
Network also proposed new challenge, such as intensive fiber deployment, more high-transmission broadband, a large amount of new demands of more low time delay.WR-WDM-
PON combines the characteristics of WR (Wavelength Routed, Wavelength routing) technology, WDM technology and PON topological structure, has height
Bandwidth, saves optical fiber, the advantages that O&M is simple, at low cost at low time delay, has its unique advantage in 5G forward pass application aspect,
It is the access technology of 5G network first choice.
WR-WDM-PON is by OLT (optical line terminal, optical line terminal), ODN (Optical
Distribution Network, Optical Distribution Network) and ONU composition, wherein ODN includes optical fiber feeder section, WM (Wavelength
Multiplexer, wavelength multiplexing device) and branch optical fiber.WM is a kind of in WR-WDM-PON wavelength channel pair and channel
The two-way function unit of multiplex/demultiplex function is provided between group.It is different by the WM branch in ODN in WR-WDM-PON
Wavelength, wavelength used in ONU is determined by ODN, and each ONU's uses a pair of (uplink and downlink) dedicated operating wave
It is long.The operation wavelength of ONU is that the physical connection by ONU in ODN determines in WR-WDM-PON, and WM device which is attached to
A port is determined.Similarly, in the side OLT, the operation wavelength of each port OLT is also what physical connection determined, is attached to
What which port of the WM device of the side OLT was determined.
In WR-WDM-PON, ONU should be colorless ONU, i.e. ONU equipment does not preassign any wavelength.But colorless ONU
After accessing WR-WDM-PON, uplink operation wavelength can not be automatically configured, needs to carry out manual configuration, and the efficiency of manual configuration
It is lower, and will increase artificial and O&M cost.
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 ONU uplink operation wavelength is automatic
The uplink operation wavelength of configuration method, ONU and system, each ONU may be implemented to automatically configure, and improve allocative efficiency, reduce artificial
Cost and O&M cost.
To achieve the above objectives, the present invention takes a kind of ONU uplink operation wavelength method of automatic configuration, is based on Wavelength routing
Wave division multiplexing passive optical network WR-WDM-PON, which comprises establish a wavelength configuration table comprising with optical link
The identical n wavelength of the upstream wavelength of the n port of terminal OLT；After a certain downstream wavelength optical signal for receiving OLT sending, root
According to wavelength configuration table, the optical signal of different wave length is successively sent to OLT, if in period 1 T1It does not receive persistently inside and comes from
The wavelength of currently transmitted optical signal is then arranged as the uplink operation wavelength for being sent to OLT in the optical signal of OLT automatically.
On the basis of above scheme, if in T1The optical signal from OLT is inside persistently received, then according to the wavelength configuration
Table sends the optical signal of next wavelength to OLT.
On the basis of above scheme, the T1>tHair+tIt receives, tHairUnder conditions of conducting light paths, light letter is successfully transmitted to OLT
The time required to number；tIt receivesUnder conditions of conducting light paths, the time of the optical signal from OLT is had successfully received.
On the basis of above scheme, the T1Meet T2>n*T1, wherein T2Detect whether port receives optical signal for OLT
Second round.
On the basis of above scheme, the OLT establishes a wavelength mapping table comprising uplink/downlink wavelength pair, and and n
A port uplink/downlink wavelength channel is to one-to-one correspondence.
The present invention also provides a kind of ONU uplink operation wavelength method of automatic configuration, are based on WR-WDM-PON, the method packet
It includes:
OLT establishes a wavelength mapping table comprising uplink/downlink wavelength pair, and with n port uplink/downlink wavelength channel
To one-to-one correspondence；Optical network unit ONU establishes a wavelength configuration table comprising n wavelength, and it is upper with the n port of OLT
Traveling wave length is identical；
Down direction, the not used port OLT sends the optical signal of different wave length to ONU, if in second round T2It is interior
The port OLT receives the optical signal of ONU transmission, then the port stops sending optical signal, automatically by the PON mouthfuls of laser of OLT
The wavelength for sending downlink optical signal is fixed as the wavelength of currently transmitted optical signal, and marks the port to make in the mapping table
With；
Up direction, PON mouthfuls of passive optical-fiber network of ONU receive optical signal, and are successively sent out according to wavelength configuration table to OLT
The optical signal of different wave length is sent, if in period 1 T1It does not receive the optical signal from OLT persistently inside, OLT will be sent to
Uplink operation wavelength be automatically set as the wavelength of currently transmitted optical signal；And T2>n*T1。
On the basis of above scheme, down direction, not used port is successively serially sent to ONU different in the OLT
The optical signal of wavelength；If the port of OLT is in T2The optical signal of ONU transmission is not received inside, then the port stops sending light letter
Number, according to the wavelength mapping table, next port sends the optical signal of different wave length to ONU.
On the basis of above scheme, down direction, all unused ports of the OLT continue to send not to ONU parallel
The optical signal of co-wavelength, and each port is in T2It inside detects whether to receive the optical signal from ONU respectively.
On the basis of above scheme, the T1>tHair+tIt receives, wherein tHairBetween OLT and ONU under conditions of conducting light paths,
The time required to the PON mouth of ONU is successfully transmitted optical signal to OLT；tIt receivesBetween OLT and ONU under conditions of conducting light paths, ONU's
The PON mouthfuls of times for having successfully received the optical signal from OLT.
On the basis of above scheme, up direction, if in period 1 T1The light letter from OLT is not received persistently inside
Number, ONU determines that uplink operation wavelength is the wavelength of currently transmitted optical signal, and the PON mouth laser of ONU is sent uplink linght automatically
The wavelength of signal is fixed as the wavelength of currently transmitted optical signal.
On the basis of above scheme, the method also includes: after OLT the and ONU wavelength automatically configures, the port of OLT
Optical signal is persistently sent to ONU, while the PON mouth of ONU sends the optical signal of corresponding wavelength to OLT, starts to carry out information exchange
It is transmitted with data.
The present invention also provides a kind of ONU that uplink operation wavelength automatically configures, and are based on WR-WDM-PON, and the ONU includes:
Wavelength configuration table comprising n wavelength identical with the upstream wavelength of n port of OLT；
Receiving module is used to receive the optical signal from OLT；
Sending module is used to send optical signal to OLT；
Control module is used for after the receiving module receives the optical signal from OLT, and T1It does not receive persistently inside
When optical signal from OLT, the sending module is controlled by the wavelength of currently transmitted optical signal and is automatically set as uplink operating wave
It is long, and the fixed optical signal for sending current wavelength.
On the basis of above scheme, if the receiving module is in T1Inside persistently receive the optical signal from OLT, the control
Molding block controls sending module according to the wavelength configuration table, and the optical signal of next wavelength is sent to OLT.
The present invention also provides a kind of ONU uplink operation wavelength automatic configuration systems, are based on WR-WDM-PON, the system packet
Include OLT and at least one ONU；
The OLT includes wavelength mapping table comprising uplink/downlink wavelength pair, and with n port uplink/downlink wavelength channel
To one-to-one correspondence；The ONU includes wavelength configuration table, receiving module, sending module and control module, the wavelength configuration table packet
Include n wavelength identical with the upstream wavelength of n port of OLT；
Down direction, the OLT are used to send the optical signal of different wave length to ONU by not used port, if
Second round T2The interior port OLT receives the optical signal of ONU transmission, then the port stops sending optical signal, automatically being somebody's turn to do OLT
The wavelength that PON mouthfuls of lasers send downlink optical signal is fixed as the wavelength of currently transmitted optical signal, and gets the bid in the mapping table
Remember that the port has used；
Up direction, the receiving module of the ONU is for receiving the optical signal from OLT, and the control module is for controlling
Sending module processed successively sends the optical signal of different wave length according to wavelength configuration table to OLT；When the receiving module is in T1Do not have inside
Have and persistently receive the optical signal from OLT, the control module control sending module is automatic by the wavelength of currently transmitted optical signal
It is set as uplink operation wavelength, the fixed optical signal for sending current wavelength is to OLT, wherein T2>n*T1。
On the basis of above scheme, down direction, the not used port OLT successively serially sends different waves to ONU
Long optical signal；If the port of OLT is in T2Not receiving the optical signal of ONU transmission inside, then the port stops sending optical signal,
According to the wavelength mapping table, next port sends the optical signal of different wave length to ONU.
On the basis of above scheme, down direction, all unused ports of the OLT continue to send not to ONU parallel
The optical signal of co-wavelength, and each port is in T2It inside detects whether to receive the optical signal from ONU respectively.
On the basis of above scheme, the T1>tHair+tIt receives, wherein tHairBetween OLT and ONU under conditions of conducting light paths,
The time required to the sending module of ONU is successfully transmitted optical signal to OLT；tIt receivesBetween OLT and ONU under conditions of conducting light paths, ONU
Receiving module have successfully received time of the optical signal from OLT.
The beneficial effects of the present invention are: in WR-WDM-PON, the n port of OLT by ODN successively serially or simultaneously
The optical signal of different wave length is sent to ONU parallel, and whether receives the optical signal of ONU transmission according to OLT, to determine under ONU
Row operation wavelength with whether to stop to ONU send optical signal.
And after ONU receives optical signal, the PON mouth poll of ONU sends the optical signal of different wave length to OLT, and is according to ONU
It is no to receive the optical signal that OLT is sent persistently to determine the uplink operation wavelength of ONU.If ONU cannot persistently receive OLT transmission
Optical signal then can determine that the uplink operation wavelength of ONU sends the wavelength of optical signal for the PON mouth of ONU at this time, and automatically by ONU
PON mouth laser send wavelength fixed setting wavelength thus.
The method that this ONU uplink operation wavelength automatically configures, avoids the drawbacks of manual configuration is brought, substantially increases
The convenience and flexibility of ONU O&M, reduce O&M cost, and the service fulfillment of ONU is made to become efficient.
Detailed description of the invention
Fig. 1 is the architecture diagram of WR-WDM-PON of the present invention；
Fig. 2 is that ONU of the present invention passes through down direction flow chart after ODN access OLT；
Fig. 3 is that ONU of the present invention passes through up direction flow chart after ODN access OLT.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
First embodiment
A kind of ONU uplink operation wavelength method of automatic configuration, can be used in WR-WDM-PON, the present embodiment method packet
It includes:
ONU establishes a wavelength configuration table in initialization comprising n wavelength, and n port of n wavelength and OLT
Upstream wavelength it is identical.Table 1 is that the wavelength configuration table established is followed successively by λ wherein having configured in order n wavelengthu1、λu2、……
λun；The wavelength of configuration is identical as the upstream wavelength of n port of OLT.
Table 1
| Serial number | 1 | 2 | …… | m | …… | n |
| Wavelength | λu1 | λu2 | …… | λum | …… | λun |
After ONU initialization, if after receiving a certain downstream wavelength optical signal that OLT is issued, starting period 1 T1, according to
Wavelength configuration table successively sends the optical signal of different wave length to OLT.
Judge in period 1 T1Inside whether the optical signal from OLT can be persistently received, if so, explanation persistently receives,
Show that the upstream wavelength does not negotiate successfully, according to wavelength configuration table, the optical signal of next wavelength to be sent to OLT with OLT；If
It is no, illustrate not receive persistently, shows that the upstream wavelength and OLT are negotiated successfully, can determine the work by data feedback channel at this time
Make wavelength, that is, the wavelength of currently transmitted optical signal, and PON mouthfuls of laser is set automatically, the wave of optical signal will be sent to OLT
The long wavelength for being fixed as currently transmitted optical signal, such as currently transmitted wavelength of optical signal are λum(1≤m≤n), then it is fixed to send
Row operation wavelength is λum(1≤m≤n)。
Wherein, it needs to meet T2>n*T1, n is the port number of OLT, T2Detect whether port receives optical signal for OLT
Second round after issuing a certain downstream wavelength, judges whether the detection cycle for receiving the upstream wavelength of ONU sending.Also, T1
>tHair+tIt receives, tHairUnder conditions of conducting light paths, the time required to being successfully transmitted optical signal to OLT；tIt receivesUnder conditions of conducting light paths,
Have successfully received the time of the optical signal from OLT.
In addition, there may also be a wavelength mapping tables by OLT comprising uplink/downlink wavelength pair, Add/drop wavelength pair and n
Port uplink/downlink wavelength channel is to one-to-one correspondence.
Second embodiment
The present embodiment ONU uplink operation wavelength method of automatic configuration, can be used in WR-WDM-PON.As shown in Figure 1, being
The architecture diagram of WR-WDM-PON, including OLT, ODN and multiple ONU.The PON mouth of OLT includes n port, and n > 1, each port leads to
An ONU can be accessed by crossing ODN, and each port includes a pair of of uplink/downlink wavelength channel.The port OLT laser sends light
The tunable wave length of signal, and port laser can receive the optical signal of any wavelength.In ODN include optical fiber feeder section, WM and
Branch optical fiber.ONU is colorless ONU, and the PON mouth laser of ONU sends the tunable wave length of optical signal, and the PON mouth laser of ONU
Device can receive the optical signal of any wavelength.
Method includes: in the present embodiment
It is initialized after OLT starting, a wavelength mapping table is established according to the different wavelength of WM branch comprising upper/
Downstream wavelength pair, and with n port uplink/downlink wavelength channel to one-to-one correspondence, i.e., the uplink/downlink operating wave of each port laser
The long uplink/downlink wavelength for being equal to the WM branch being attached thereto.
As shown in table 2, including OLT port numbers, upstream wavelength, downstream wavelength and use label in wavelength mapping table, initially
It is all when change to be both configured to "No" using label, indicate that corresponding ports are unoccupied.Uplink/downlink wavelength is successively in wavelength mapping table
For λu1/λd1、λu2/λd2、……λun/λdn, respectively with n port uplink/downlink wavelength channel to one-to-one correspondence.It is mapped according to wavelength
Table when initialization, directly sets n port laser and receives/send wavelength of optical signal value and be followed successively by λu1/λd1、λu2/λd2、……
λun/λdn。
Only for convenience of description, specifically, the different port of WM is accessed in the port OLT of the side OLT to wavelength value in table 2
When, upstream wavelength, the downstream wavelength of the port OLT have just secured.The Wavelength tunable of the port OLT laser transmission optical signal
It is humorous, and port laser can receive the optical signal of any wavelength, but since the port OLT itself does not know which end of access WM
Mouthful, it is necessary to the upstream wavelength for the port WM accessed according to the port OLT, the downstream wavelength setting port OLT laser connect and transmit/receive
Send wavelength of optical signal value.For example, the port WM that OLT port numbers 1 access, which supports upstream wavelength λu1, downstream wavelength
λd1, then the laser of the OLT port numbers 1 should set work in upstream wavelength λu1, downstream wavelength λd1On.
Table 2
ONU establishes a wavelength configuration table, and including n wavelength, the PON mouth laser that n wavelength is ONU is supported
Wavelength of optical signal is sent, and identical as the upstream wavelength of n port of OLT.In specific wavelength configuration table and first embodiment
Identical, as shown in table 1, upgoing wave long value sets gradually as λ in wavelength configuration tableu1、λu2、……λun。
As shown in Fig. 2, the specific steps of down direction include: after ONU accesses OLT by ODN
The not used port m of S101.OLT (1≤m≤n) passes through the PON mouth of OLT, and downstream wavelength is persistently sent to ONU is
λdmThe optical signal of (1≤m≤n), and start second timer timing.
S102.OLT is in T2Whether detection port m receives the optical signal of ONU transmission in period, if not, into S103；Such as
Fruit is, into S104.
The port S103.OLT m does not receive the optical signal of ONU transmission, then port m stops sending optical signal to ONU, according to
Wavelength mapping table persistently sends the optical signal of next wavelength from next unused port to ONU, and it is fixed to restart second
When device, into S102.In the present embodiment, it is assumed that next unused port m+1, then continuing a length of λ of send wave to ONUd(m+1)
The optical signal of (1≤m≤n).
The port S104.OLT m receives the optical signal of ONU transmission, then port m stops sending optical signal, inquiry wavelength mapping
Table can determine that the operation wavelength of the down going channel of ONU is the wavelength X of the currently transmitted optical signal of port mdm(1≤m≤n).Its
In, T2 > n*T1, T1>tHair+tIt receives；tHairBetween OLT and ONU under conditions of conducting light paths, the sending module of ONU is successfully sent out to OLT
The time required to sending optical signal；tIt receivesBetween OLT and ONU under conditions of conducting light paths, the receiving module of ONU, which has successfully received, to be come from
The time of the optical signal of OLT.Also, each port laser of OLT sends wavelength, duration, interval and the frequency of optical signal
Rate etc. is all adjustable.
S105.OLT is to have used in wavelength mapping list notation port m.When there is new ONU to access OLT by ODN, mark
Remember that used port m cannot be reused.
3rd embodiment
The present embodiment is essentially identical with second embodiment, and only part is not identical, specifically:
All unused ports of a101.OLT, the parallel optical signal for continuing to send different wave length to ONU.
Each port of a102.OLT is detected respectively, in T2Inside whether receive the optical signal of ONU transmission；If not, being transferred to
a101；If so, into S103.
A103. if there is port receives the optical signal of ONU transmission, which stops sending optical signal, inquiry wavelength mapping
Table.Such as the port OLT m receives the optical signal of ONU transmission, then port m stops sending optical signal, inquires wavelength mapping table, can be with
The operation wavelength for determining the down going channel of ONU is the wavelength X of the currently transmitted optical signal of port mdm(1≤m≤n).Wherein, T2>n*
T1, T1>tHair+tIt receives；tHairBetween OLT and ONU under conditions of conducting light paths, the sending module of ONU is successfully transmitted optical signal to OLT
Required time；tIt receivesBetween OLT and ONU under conditions of conducting light paths, the receiving module of ONU has successfully received the letter of the light from OLT
Number time.Also, wavelength, duration, interval and the frequency etc. that each port laser of OLT sends optical signal can
It adjusts.
A104.OLT is to have used in wavelength mapping list notation port m.When there is new ONU to access OLT by ODN, mark
Remember that used port m cannot be reused.
Fourth embodiment
Based on second embodiment or 3rd embodiment, in the present embodiment, as shown in figure 3, the specific steps of up direction
Include:
The PON mouth of S201.ONU receives optical signal, and after ONU accesses OLT by ODN, the wavelength that can be received is existed by ONU
Physical connection in ODN determines, i.e., is determined by which branch port for being connected to WM.Therefore, in the not used port m of OLT
(1≤m≤n) is to a length of λ of ONU send wavedmWhen the optical signal of (1≤m≤n), it is λ that the PON mouth of ONU, which will receive downstream wavelength,dm(1
≤ m≤n) optical signal, wavelength Xdm(1≤m≤n) is the downstream wavelength for the branch port that ONU is connect with WM.
The PON mouth of S202.ONU successively sends the optical signal of different wave length to OLT, for example, first according to wavelength configuration table
Continue a length of λ of send wave to OLTu1Optical signal；Then start first timer.
The PON mouth T of S203.ONU1(T2>n*T1) in the period, detect whether the optical signal that can persistently receive OLT transmission, such as
Fruit is, into S204；If not, into S205.
S204.ONU can persistently receive the optical signal of OLT transmission, then according to wavelength configuration table, the PON mouth for modifying ONU swashs
The transmission wavelength of light device continues persistently to send optical signal to OLT, and restarts second timer, into S203.
S205.ONU does not receive the optical signal of OLT transmission persistently, then can determine that the data feedback channel operation wavelength of ONU is
The wavelength X of the currently transmitted optical signal of PON mouth of ONUum(1≤m≤n)；Wherein, T1>tHair+tIt receives, tHairThe optical path between OLT and ONU
Under conditions of conducting, the time required to the sending module of ONU is successfully transmitted optical signal to OLT；tIt receivesOptical path is led between OLT and ONU
Under conditions of logical, the receiving module of ONU has successfully received the time of the optical signal from OLT.The PON mouth laser of ONU sends light
Wavelength, duration, interval and the frequency of signal etc. are adjustable.
S206. the wavelength that the PON mouth laser uplink of setting ONU sends optical signal automatically is fixed as λum(1≤m≤n)。
5th embodiment
The present embodiment is on the basis of fourth embodiment, and after the completion of OLT the and ONU wavelength configuration, the port OLT m is to ONU
Persistently send optical signal.At this moment, the PON mouth of the port OLT m and ONU starts simultaneously in the optical signal for sending known wavelength to opposite end
Carry out information exchange and data transmission.A period 3 T can be set3, T3Length of time it is adjustable；By T3Afterwards, the end OLT
Mouth m persistently sends optical signal to ONU.T is set3Purpose be to be executed in order to which the wavelength for allowing OLT and ONU to carry out automatically configures process
It finishes, therefore T3It can self-setting according to the actual situation.
Sixth embodiment
The present embodiment protects a kind of ONU that uplink operation wavelength automatically configures, and can be used in WR-WDM-PON, described
ONU specifically includes wavelength configuration table, receiving module, sending module and control module.
Wherein, wavelength configuration table includes n wavelength identical with the upstream wavelength of n port of OLT, specific as first is real
It applies shown in the table 1 in example.
For receiving the optical signal from OLT, sending module is used to send optical signal to OLT receiving module, and sends
All pass through the PON mouth of ONU with reception.
Control module is used for: after receiving module receives the optical signal from OLT, and T1It does not receive persistently inside and comes from
When the optical signal of OLT, the wavelength of currently transmitted optical signal is automatically set as uplink operation wavelength by control sending module, and fixed
The optical signal of current wavelength is sent to OLT.Control module is also used to: when receiving module is in T1Inside persistently receive the light from OLT
When signal, sending module is controlled according to the wavelength configuration table, the optical signal of next wavelength is sent to OLT.
The ONU of the present embodiment is in use, can be using method described in first embodiment.
7th embodiment
The present embodiment protects a kind of ONU uplink operation wavelength automatic configuration system, is based on WR-WDM-PON, as shown in Figure 1,
Including OLT, ODN and multiple ONU.The PON mouth of OLT includes n port, and n > 1, each port can access one by ODN
ONU, and each port includes a pair of of uplink/downlink wavelength channel；ONU is colorless ONU, the PON mouth laser of ONU and the end OLT
The wavelength that mouth laser sends optical signal is all tunable, and can receive the optical signal of any wavelength.
OLT include a wavelength mapping table comprising uplink/downlink wavelength pair, and with n port uplink/downlink wavelength channel
To one-to-one correspondence.ONU includes wavelength configuration table, receiving module, sending module and control module, wherein wavelength configuration table includes n
A wavelength, and it is identical as the upstream wavelength of n port of OLT.
Down direction, OLT are used to send the optical signal of different wave length to ONU by not used port；In second round
T2Interior, if the port OLT receives the optical signal of ONU transmission, OLT is also used to that the port is made to stop sending optical signal, and in institute
It states and the port is marked to use in mapping table.
Preferably, down direction, the not used port OLT in a serial fashion, successively send the light of different wave length to ONU
Signal.In this manner, if the port of OLT is in T2The optical signal of ONU transmission is not received inside, then the port stops sending
Optical signal, according to the wavelength mapping table, next port sends the optical signal of different wave length to ONU.
Preferably, all unused ports of down direction, OLT lasting parallel can send different wave length to ONU
Optical signal, and each port is in T2It inside detects whether to receive the optical signal from ONU respectively, if do not received, continue
Lasting sends the optical signal of different wave length to ONU and is detected, until receiving the optical signal of ONU.
Up direction, the receiving module of ONU is for receiving the optical signal from OLT.Control module sends mould for controlling
Root tuber successively sends the optical signal of different wave length according to wavelength configuration table to OLT；If receiving module is in T1It does not receive persistently inside
Optical signal from OLT, control module control sending module, and the wavelength of currently transmitted optical signal is automatically set as uplink work
Wavelength, the fixed optical signal for sending current wavelength of the PON mouth laser of ONU is to OLT.
Wherein, T2>n*T1, T1>tHair+tIt receives；tHairBetween OLT and ONU under conditions of conducting light paths, the sending module of ONU to
The time required to OLT is successfully transmitted optical signal；tIt receivesBetween OLT and ONU under conditions of conducting light paths, the receiving module success of ONU
Receive the time of the optical signal from OLT.
In WR-WDM-PON, the n port of OLT successively serially or is simultaneously sent not to ONU the present invention parallel by ODN
The optical signal of co-wavelength, and according to whether receive the optical signal of ONU transmission to determine the downlink working wavelength of ONU, and whether
Stop sending optical signal to ONU.After ONU receives optical signal, the PON mouth poll of ONU sends the light letter of different wave length to OLT
Number, and according to whether receive the optical signal of OLT transmission persistently to determine the uplink operation wavelength of ONU.If ONU cannot continue to receive
The optical signal sent to OLT then can determine that the uplink operation wavelength of ONU is the wavelength of the currently transmitted optical signal of PON mouth of ONU,
And the PON mouthfuls of laser transmission wavelength is set automatically and is fixed as this wavelength.The present invention substantially increase the convenience of ONU O&M with
Flexibility reduces O&M cost, and the service fulfillment of ONU is made to become efficient.
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 (17)
1. a kind of ONU uplink operation wavelength method of automatic configuration, which is characterized in that the Wavelength division multiplexing-passive light based on Wavelength routing
Network WR-WDM-PON, which comprises
Establish a wavelength configuration table comprising n wavelength identical with the upstream wavelength of n port of optical line terminal OLT；
After a certain downstream wavelength optical signal for receiving OLT sending, according to wavelength configuration table, different wave length successively is sent to OLT
Optical signal, if in period 1 T1It does not receive the optical signal from OLT persistently inside, then currently transmitted optical signal is set automatically
Wavelength as the uplink operation wavelength for being sent to OLT.
2. ONU uplink operation wavelength method of automatic configuration as described in claim 1, it is characterised in that: if in T1Interior lasting receipts
To the optical signal from OLT, then according to the wavelength configuration table, the optical signal of next wavelength is sent to OLT.
3. ONU uplink operation wavelength method of automatic configuration as claimed in claim 1 or 2, it is characterised in that: the T1>tHair+tIt receives,
tHairUnder conditions of conducting light paths, the time required to being successfully transmitted optical signal to OLT；tIt receivesUnder conditions of conducting light paths, successfully receive
To the time of the optical signal from OLT.
4. ONU uplink operation wavelength method of automatic configuration as claimed in claim 3, it is characterised in that: the T1Meet T2>n*
T1, wherein T2The second round whether port receives optical signal is detected for OLT.
5. ONU uplink operation wavelength method of automatic configuration as claimed in claim 3, it is characterised in that: the OLT establishes one
Wavelength mapping table comprising uplink/downlink wavelength pair, and with n port uplink/downlink wavelength channel to one-to-one correspondence.
6. a kind of ONU uplink operation wavelength method of automatic configuration, which is characterized in that be based on WR-WDM-PON, which comprises
OLT establishes a wavelength mapping table comprising uplink/downlink wavelength pair, and with n port uplink/downlink wavelength channel to one
One is corresponding；Optical network unit ONU establishes a wavelength configuration table comprising n wavelength, and the upgoing wave with the n port of OLT
Length is identical；
Down direction, the not used port OLT sends the optical signal of different wave length to ONU, if in second round T2Interior OLT
Port receives the optical signal of ONU transmission, then the port stops sending optical signal, under automatically sending the PON mouthfuls of laser of OLT
The wavelength of traveling optical signal is fixed as the wavelength of currently transmitted optical signal, and marks the port to use in the mapping table；
Up direction, PON mouthfuls of passive optical-fiber network of ONU receive optical signal, and are successively sent not according to wavelength configuration table to OLT
The optical signal of co-wavelength, if in period 1 T1It does not receive the optical signal from OLT persistently inside, the upper of OLT will be sent to
Row operation wavelength is automatically set as the wavelength of currently transmitted optical signal；And T2>n*T1。
7. ONU uplink operation wavelength method of automatic configuration as claimed in claim 6, it is characterised in that: down direction, it is described
Not used port successively serially sends the optical signal of different wave length to ONU in OLT；If the port of OLT is in T2It does not receive inside
The optical signal sent to ONU, then the port stops sending optical signal, and according to the wavelength mapping table, next port is sent out to ONU
Send the optical signal of different wave length.
8. ONU uplink operation wavelength method of automatic configuration as claimed in claim 6, it is characterised in that: down direction, it is described
All unused ports of OLT continue the optical signal that different wave length is sent to ONU parallel, and each port is in T2Inside examine respectively
It surveys and whether receives the optical signal from ONU.
9. ONU uplink operation wavelength method of automatic configuration as claimed in claim 6, it is characterised in that: the T1>tHair+tIt receives,
In, tHairBetween OLT and ONU under conditions of conducting light paths, the time required to the PON mouth of ONU is successfully transmitted optical signal to OLT；tIt receives
Between OLT and ONU under conditions of conducting light paths, the PON mouth of ONU has successfully received the time of the optical signal from OLT.
10. ONU uplink operation wavelength method of automatic configuration as claimed in claim 6, it is characterised in that: up direction, if
In period 1 T1Do not receive the optical signal from OLT persistently inside, ONU determines that uplink operation wavelength is currently transmitted optical signal
Wavelength, the wavelength that the PON mouth laser of ONU sends uplink optical signal is fixed as to the wavelength of currently transmitted optical signal automatically.
11. such as the described in any item ONU uplink operation wavelength method of automatic configuration of claim 6-10, which is characterized in that described
Method further include: after OLT the and ONU wavelength automatically configures, the port of OLT persistently sends optical signal to ONU, while ONU
The PON mouthfuls of optical signals to OLT transmission corresponding wavelength start to carry out information exchange and data transmission.
12. a kind of ONU that uplink operation wavelength automatically configures, which is characterized in that be based on WR-WDM-PON, the ONU includes:
Wavelength configuration table comprising n wavelength identical with the upstream wavelength of n port of OLT；
Receiving module is used to receive the optical signal from OLT；
Sending module is used to send optical signal to OLT；
Control module is used for after the receiving module receives the optical signal from OLT, and T1It does not receive persistently inside and comes from
When the optical signal of OLT, the sending module is controlled by the wavelength of currently transmitted optical signal and is automatically set as uplink operation wavelength, and
The fixed optical signal for sending current wavelength.
13. the ONU that uplink operation wavelength as claimed in claim 12 automatically configures, it is characterised in that: if the reception mould
Block is in T1Inside persistently receive the optical signal from OLT, the control module control sending module according to the wavelength configuration table, to
OLT sends the optical signal of next wavelength.
14. a kind of ONU uplink operation wavelength automatic configuration system, it is characterised in that: it is based on WR-WDM-PON, the system comprises
OLT and at least one ONU；
The OLT includes wavelength mapping table comprising uplink/downlink wavelength pair, and with n port uplink/downlink wavelength channel to one
One is corresponding；
The ONU includes wavelength configuration table, receiving module, sending module and control module, and the wavelength configuration table includes and OLT
N port the identical n wavelength of upstream wavelength；
Down direction, the OLT is used to send the optical signal of different wave length to ONU by not used port, if second
Cycle T2The interior port OLT receives the optical signal of ONU transmission, then the port stops sending optical signal, automatically by the PON of OLT
The wavelength that mouth laser sends downlink optical signal is fixed as the wavelength of currently transmitted optical signal, and label should in the mapping table
Port has used；
Up direction, the receiving module of the ONU is for receiving the optical signal from OLT, and the control module is for controlling hair
The optical signal for sending module successively to send different wave length to OLT according to wavelength configuration table；When the receiving module is in T1It does not hold inside
Continuous to receive the optical signal from OLT, the wavelength of currently transmitted optical signal is arranged the control module control sending module automatically
For uplink operation wavelength, the fixed optical signal for sending current wavelength is to OLT, wherein T2>n*T1。
15. ONU uplink operation wavelength automatic configuration system as claimed in claim 14, it is characterised in that: down direction, it is described
The not used port OLT successively serially sends the optical signal of different wave length to ONU；If the port of OLT is in T2It does not receive inside
The optical signal that ONU is sent, then the port stops sending optical signal, and according to the wavelength mapping table, next port is sent to ONU
The optical signal of different wave length.
16. ONU uplink operation wavelength automatic configuration system as claimed in claim 14, it is characterised in that: down direction, it is described
All unused ports of OLT continue the optical signal that different wave length is sent to ONU parallel, and each port is in T2Inside examine respectively
It surveys and whether receives the optical signal from ONU.
17. ONU uplink operation wavelength automatic configuration system as claimed in claim 14, it is characterised in that: the T1>tHair+tIt receives,
Wherein tHairBetween OLT and ONU under conditions of conducting light paths, the sending module of ONU is successfully transmitted optical signal to OLT and is taken
Between；tIt receivesBetween OLT and ONU under conditions of conducting light paths, the receiving module of ONU have successfully received the optical signal from OLT when
Between.
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| WO2021008503A1 (en) * | 2019-07-12 | 2021-01-21 | 中国移动通信有限公司研究院 | Management control method and device for new fronthaul network |
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