CN103916191B - Method and apparatus for optical access network - Google Patents
Method and apparatus for optical access network Download PDFInfo
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- CN103916191B CN103916191B CN201210592481.0A CN201210592481A CN103916191B CN 103916191 B CN103916191 B CN 103916191B CN 201210592481 A CN201210592481 A CN 201210592481A CN 103916191 B CN103916191 B CN 103916191B
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Abstract
An embodiment of the invention provides a method and apparatus for an optical access network. Specifically, the embodiment of the invention provides a method and control apparatus for an optical access network, a method for controlling an optical network unit transceiver and the corresponding optical network unit transceiver, wherein the method for the optical access network includes receiving a control signal from an optical line terminal and controlling an electro-optical switch based on the control signal so as to transmit downstream signals belonging to respective optical network units to multiple groups of optical network units via the electro-optical switch respectively. With the invention, the cost of processing the downstream signals of the optical network units can be saved, and the energy consumption is therefore effectively reduced.
Description
Technical field
Embodiments of the present invention are usually related to Optical Access Network.More specifically, embodiments of the present invention are related to use
In the method and control device of Optical Access Network, and the method for optical network unit (ONU) transceiver and corresponding light net
Network unit transceiver.
Background technology
The communication service for currently occupying big bandwidth is continued to bring out, and quantity is also constantly increasing, and is this passive optical network
Network (PON) technology is strided forward to higher bit rate, for example, 10G EPON and 10G GPON, or even 40Gbit/s PON occurred
(XLGPON) system is already present in standardized process.However, being continuously increased for line speed also brings asking for high energy consumption
Topic.In the exploitation of following Optical Access Network, the choice of technology of high energy consumption or Technology design will not only increase the operation of application into
This, but also potential environmental problem is brought, such as greenhouse gases (GHG) emission problem.Recently, the high energy consumption issues by
It is considered a serious problems and causes global concern, so as to causes extensive energy saving research in optical access network field.
The high energy consumption of actually PON system comes from the foundation structure of its own.For the ease of explaining, Fig. 1 is exemplary to be shown
The foundation structure is gone out.As shown in fig. 1, in current PON, downstream traffic (four time slot blocks as shown in the figures) from
Optical line terminal (OLT) is broadcast to all of ONU, ONU 1 as shown in the figures, ONU 2, ONU 3 and ONU 4.Due to this
The broadcast transmission methods of sample, ONU will have to process all business for receiving, although it may be without the such industry of request
Business.As shown in FIG., ONU 1 belongs to its downstream time slots 1 except processing, and will also extraly process the data of time slot 2-4.It is similar
Ground, ONU 2 belongs to its downstream time slots 2 except processing, and will also extraly process time slot 1,3 and 4.Obviously, such broadcast is passed
Defeated and indiscriminate processing mode wastes the disposal ability of ONU and causes excessive energy consumption.
The content of the invention
In order to effectively alleviate or solve the problems, such as it is at least the above mention, embodiments of the present invention provide it is a kind of effectively
Mechanism, enabling significantly reduce the energy consumption of Optical Access Network, obtains high energy ecology.
One of the invention embodiment there is provided a kind of control device for Optical Access Network, the equipment bag
Combiner is included, is configured to receive the downstream signal for coming from optical line terminal and is sent upstream letter to the optical line terminal
Number.The equipment also includes electrooptical switching and the controller being connected with combiner respectively, wherein the controller is configured to be based on
Control signal in downstream signal come control the electrooptical switching with to multigroup optical network unit send belong to each group optical-fiber network list
The downstream signal of unit.
It is of the invention another embodiment there is provided a kind of method for Optical Access Network, the method includes connecing
Receive the control signal from optical line terminal.The method also includes controlling electrooptical switching based on the control signal, so as to Jing
Sent the downstream signal for belonging to each group optical network unit respectively to multigroup optical network unit from the electrooptical switching.
One of the invention embodiment there is provided a kind of optical network unit transceiver, the optical network unit transmitting-receiving
Device includes optical network unit transmitter, is configured to send stream signal.The optical network unit transceiver also includes optical-fiber network list
First receiver, the optical network unit receiver includes optical power monitoring module, is configured to downstream signal to receiving
Power is monitored, to control the optical network unit receiver in mode of operation or in park mode, wherein described
The downstream signal that optical network unit belongs to an optical network unit group and receives is belonging to the downstream of this group of optical network unit
Signal.The optical network unit receiver also includes local clock module, is configured to when the optical network unit receiver is in
The local clock pulses synchronous with reception are produced during park mode, so that the optical network unit transmitter is in the optical-fiber network list
When first receiver is in park mode, the stream signal is sent based on the local clock pulses.
According to another implementation of the invention, there is provided a kind of method for optical network unit transceiver, the party
Method includes that the power of the downstream signal to receiving is monitored, so that the optical network unit for controlling optical network unit transceiver connects
Device is received in mode of operation or park mode, wherein the optical network unit belongs to an optical network unit group and receives
Downstream signal is belonging to the downstream signal of this group of optical network unit.The method is also included when the optical network unit receiver is in
The local clock pulses synchronous with reception are produced during park mode, so that the optical network unit of the optical network unit transceiver is sent out
Device is sent when the optical network unit receiver is in park mode, the upstream letter is sent based on the local clock pulses
Number.
Using embodiments of the present invention, downstream signal is sent to each ONU groups after packet by control, can be effectively
Avoid ONU from processing the downstream signal of all broadcast, and only need to process the downstream signal for belonging to its ONU group, thereby saving at ONU
The energy consumption of reason downstream signal.Further, park mode is entered by neatly controlling ONU, the process for further saving ONU is opened
Pin, so as to be effectively reduced energy consumption.
Description of the drawings
According to the detailed description of illustrative embodiments below in conjunction with the accompanying drawings, above and other purpose, the spy of the present invention
The advantage of seeking peace will be apparent from, in the accompanying drawings：
Fig. 1 schematically shows the simplified infrastructure diagram of existing PON；
Fig. 2 schematically shows the control device introduced in the PON shown in Fig. 1 according to one embodiment of the present invention
Downstream data afterwards processes diagram；
Fig. 3 is the structure for schematically showing the control device for Optical Access Network according to one embodiment of the present invention
Block diagram；
Fig. 4 is the structured flowchart for schematically showing the optical network unit transceiver according to another embodiment of the invention；
Fig. 5 is the operation transition diagram for schematically showing the optical network unit receiver according to one embodiment of the present invention；
Fig. 6 is the frame structure for schematically showing the downstream frame according to one embodiment of the present invention；
Fig. 7 is the flow chart for schematically showing the method for Optical Access Network according to one embodiment of the present invention；
Fig. 8 is the stream for schematically showing the method for optical network unit transceiver according to one embodiment of the present invention
Cheng Tu；And
Fig. 9 is the energy ratio for schematically showing embodiment of the present invention and existing PON under different number ONU groups
Diagram.
Specific embodiment
Embodiments of the present invention propose to remove in the control device for being provided due to existing broadcast transmission mechanism
The redundant data of introducing, and control the working time of ONU receivers, the work of ONU receivers can be effectively reduced by OLT
Make the time, be thus substantially reduced energy consumption.In one embodiment, the control device includes optoelectronic switch, and it is by downstream number
According to dividing or being routed to multiple different ONU groups, so as to these ONU groups can alternately receive the data to one's name organized, and
And correspondingly enter into park mode after the completion of operation is received.In another embodiment, each ONU in ONU groups connects
Receive device and be configured with optical power monitoring module, for monitoring to the luminous power of the signal for receiving, to determine that ONU receivers enter
Enter mode of operation or park mode, each ONU is also configured with local clock module, with when ONU receivers enter park mode
Local clock is provided, so as to provide correct tranmitting data register for ONU transmitters during ONU receiver dormancy.
Embodiments of the present invention are described in detail below in conjunction with accompanying drawing.
Fig. 1 is the simplified infrastructure diagram for schematically showing existing PON.Description by diagram and above can be seen
Go out, the workload that all of downstream data increased ONU receivers is broadcasted to each ONU, so as to energy consumption will be significantly increased.
For this purpose, embodiments of the present invention introduce a kind of control device or control node in existing foundation structure, for change to
ONU transmits the mode of data, so as to the process for reducing ONU receivers is loaded.Describe below with reference to Fig. 2 according to of the invention real
Apply the foundation structure of the improved optical access network of mode.
Fig. 2 is to schematically show to be introduced in the PON shown in Fig. 1 to be set according to the control of one embodiment of the present invention
Downstream data after standby processes diagram.As shown in Figure 2, control device can be arranged between OLT and multiple ONU groups.When connecing
When receiving downstream data (represented by the 4 time slot blocks as shown in the figures) for coming from OLT, different from of the prior art
This 4 time slot data are all transmitted to into respectively each ONU, the control device of embodiment of the present invention is based on downstream data signal
In control signal this four time slot data are sequentially transmitted into ONU groups 1-4.As illustrated, the 1st time slot data are transmitted to
The time slot data of ONU groups the 1, the 2nd are transmitted to ONU groups 2, and the 3rd time slot data are transmitted to ONU groups 3, and the 4th time slot data quilt
Send ONU groups 4 to.
In view of for the ONU for being registered to OLT, its power consumption of receiver substantially can be divided into independently of data receiver
Basal energy expenditure and the energy consumption for data receiver, can be with next with the basal energy expenditure for being considered as constant with the time slot data block for changing
Characterize the energy consumption at ONU receivers.Therefore, for existing broadcast data load mode, the energy consumption at each ONU is
The energy that four time slot data of process are consumed is drawn plus basic energy consumption, such as " the existing mode power consumption " in figure.Relatively
For, in the present invention, due to the effective control of control device, it is grouped into each ONU of multiple ONU groups and will only receives and belong to this
The downstream data of group, and the downstream data for belonging to other groups is removed at control device, so as to each ONU in ONU groups connects
The energy that receipts device is consumed due to receiving data will decline to a great extent, i.e., the energy consumption of each ONU receiver will only be that basal energy expenditure adds
The energy consumption of a time slot data is processed, as " power consumption of embodiment of the present invention " in Fig. 1 is drawn.Relative to process 4
For time slot data, only process 1 time slot data and obviously significantly decrease energy consumption.Although according to the control of embodiment of the present invention
Control equipment at work also will power consumption, but its energy for consuming will be much smaller than the power consumption under saving, therefore the control device draws
It is necessary to enter, and is beneficial.
Fig. 3 is the structure for schematically showing the control device for Optical Access Network according to one embodiment of the present invention
Block diagram.As shown in Figure 3, control device among other things, can include electric light (EO) switch and controller.Additionally, the control
Control equipment can also include Optical circulator, optical branching device, erbium-doped fiber amplifier (EDFA) and optical filter.Here, the ring of light
Road device (according to difference of optical signal transmission mode, it would however also be possible to employ wavelength division multiplexer) is used for stream signal and downstream signal point
Open, optical branching device is used to that downstream signal to be respectively transmitted to the input of controller and EO switches.Controller is responsible for believing in downstream
Control optical signal in number is converted into electric signal, and the electric control signal will be used to control EO switches, so that downstream signal is divided
Different destination ONU groups are not transferred to, ONU groups 1-4 as shown in the figures.Routing algorithm in controller can be by OLT
To provide, and EO switches can determine downstream traffic should be transmitted toward on which paths.Because EO switches are possibly for downstream letter
Number wavelength causes big loss, EDFA can be provided before it and carry out promotion signal power.Unicast, multicast are realized in switching in EO
Or during broadcast capability, the luminous power in the output port of EO switches is different, therefore luminous power can be sharply increased into use
Make the trigger of the dormant circuit in wake-up ONU.For the transmission of upstream and downstream signal, can be with EO switches and ONU
Between increase several optical filters, for separating the signal with upstream wavelength and downstream wavelength.In order to strengthen wavelength effect
Rate, can retain multicast and broadcast capability at control device.
With regard to the multiple ONU groups being connected with above-mentioned control device, its can be in order at the complexity that reduces EO switches and
The reason for equipment loss, divides.For example, when being connected to the number of ONU of an OLT and being larger, then the output port that EO is switched
Number will increase, and this will cause EO to switch high manufacturing cost and complexity, and the loss at the route setting device will increase
Greatly.For this purpose, the present invention proposes for all of ONU to be divided into several groups, the port number of EO switches is which reduced, so as to reduce
Its cost and loss.
According to the embodiment of the present invention, the control device shown in Fig. 3 is not passive and its power consumption will mainly take
Certainly in electrooptical switching and the power of EDFA.Because the product of EDFA can be manufactured in the way of " box ", then a low-power
Control device design problem depending on EO switch.In conventional device, such as the EO based on LiNbO3 is switched, and it is occupied
Substantial amounts of energy, therefore, it is difficult to reducing power consumption.However, due to the appearance of integrated form EO switches, the energy consumption of EO switch can be with
Significantly decrease.For example, by using silicon integrated circuit, the energy consumption of EO switches can be controlled within 1W and with less
Size.Alternatively, the EO switches can also be device on the piece in EDFA boxes.
It is discussed above and is arranged according to the control device and its structure of embodiment of the present invention.Using the control device, extensively
Broadcast the redundant data that causes of transmission to be removed, so as to significantly reduce the process power consumption of ONU receivers, reach further energy-conservation
Effect.
Fig. 4 is the structured flowchart for schematically showing the optical network unit transceiver according to another embodiment of the invention.
As shown in Figure 4, the optical network unit transceiver of embodiment of the present invention is except the conventional device having in regular transceiver,
Such as the snowslide in optical network unit transmitter (for brevity, interior details are not shown) and optical network unit receiver
Photodiode (APD), transimpedance amplifier (TIA), linear amplifier (LA), clock and data recovery module (CDR), string are simultaneously
Conversion and signal processing blocks, also increased optical power control circuit (OPWC) and local clock mould in the receiver of transceiver
Block, here APD-TIA, LA, OPWC and local clock module are circuit normally open in receiver and module, i.e. no matter receiver
In mode of operation or park mode, these circuits and module generally according to needing stay open, and CDR and will be gone here and there and turn
Change with signal processing blocks is to stay open in mode of operation and the circuit that remains turned-off in park mode and module.Here,
OPWC for example can be realized by comparator circuit, and the minimum that the threshold value for being used to compare can be by generation under broadcast capability
Luminous power is determining.So, the luminous power that OPWC can be received with charge of overseeing from APD.When the ONU in ONU groups does not receive it
Group downstream data when, because the data to other ONU groups are removed from branch road, the luminous power for detecting be it is faint,
Close to zero.Conversely, when the ONU in ONU groups receives the downstream data of its group, even if under minimum luminous power state (such as
Under broadcast transmission state), can still detect luminous power.In addition, TIA and LA can be used for lifting low high-speed electrical signals arriving
Detectable level, such that it is able to more precisely detect the change of signal power.
With regard to the CDR in receiver, it is commonly used for recovered clock and regenerates data.However, due in the present invention, one
ONU in individual ONU groups does not receive the data of other groups, and this allows for the ONU can lose within the reception time period of other ONU groups
Lock-out clock.Once ONU clock synchronization loss, then current ONU frameworks will need the longer clock recovery time.In order to protect
Clock synchronization in card transmitter, and avoid the clock recovery time long in receiver, it is desirable to provide there is local clock.For
This, embodiments of the present invention increased local clock module in ONU receivers.
When ONU is in mode of operation, it belongs to the data of its own group by receiving, so as to CDR can be received together
Signal is walked, now local clock does not need work.When ONU does not receive the data of its own group, the luminous power for receiving will
Decline.The lower general who has surrendered is detected by aforesaid OPWC, and by its by sleep with wake up control signal electric control signal come
Indicate that receiver is entered in park mode.When entering in park mode, majority circuit (such as CDR and string in receiver
And change and signal processing blocks) will be in dormancy, and the energy consumption for producing is relatively low.Now, because CDR does not receive synchronous letter
Number, will be started working according to the local clock module of embodiment of the present invention, it is via electric pathway selector and OPWC's
Clock signal is provided for transmitter under the control of electric control signal, so that transmitter is sent on described based on local clock pulses
Trip signal, the action of the offer local clock pulses will persistently be carried out during receiver park mode.When ONU starts to receive category
When the downstream data that it is organized, OPWC will detect the increase of received optical power, so as to incite somebody to action with control signal is waken up via sleep
CDR and serioparallel exchange and signal processing blocks wake up.Due to synchronizing signal can be received during operation is received, therefore according to this
The local clock module of invention embodiment can as needed or setting come select close.
In order to save manufacturing cost, the local clock module of embodiment of the present invention can adopt the clock mould of low precision
Block, and can be corrected by receiving the clock correction signal for coming from CDR.Just as it was previously stated, when receiver is being held
When row receives operation, it can extract synchronizing signal (such as synchronization frame) from downstream frame, so as to keep synchronous in operation is received.
The synchronizing signal can be used for adjusting local clock module by CDR, so as in local clock pulses precise decreasing, to it is local when
Clock module is corrected.When the synchronization frame that downstream frame includes is more, then CDR can constantly be adjusted based on these synchronization frames
Local clock, so as to obtain of a relatively high precision.But in turn, synchronous number of frames is more, then mean that receiver will take for
The longer time performs reception operation, and this can similarly bring potential energy consumption problem.Therefore, the selection of local clock precision
It is a process weighed the advantages and disadvantages for energy consumption.
In a word, due to the introducing of local clock module, ONU routine operations in the operational mode are not only ensured, is also subtracted
The little conversion time from park mode to mode of operation, so as to park mode is easy to adopt.Along with the reduction of receiving data
With the entrance of park mode, the energy consumption of each ONU is further reduced.
Fig. 5 is the state transition operation for schematically showing the optical network unit receiver according to one embodiment of the present invention
500 diagram.As shown in Figure 5, at S501, ONU can report its transmission state to OLT, and for example, it can pass through up
Wavelength asks on which or which time slot receiving data to OLT and demand to bandwidth etc..Then, at S502, OLT
The transmission state of all ONU is collected from upstream frames and according to the routing algorithm of existing or following exploitation forming control frame,
And to these ONU transmission control frames in downstream data.At S503, when the control device according to embodiment of the present invention connects
When receiving downstream frame and being included in the control frame of downstream frame, it controls EO switches according to the control frame, so as to by downstream frame
It is divided into different ONU groups.At S504, when detecting the optical power levels that receive according to the OPWC of embodiment of the present invention
When Pm exceedes predetermined threshold value Pt, it indicates that ONU receivers enter into mode of operation from park mode, and starts reception and belong to
The downstream frame of oneself group.When OPWC detects optical power levels Pm for receiving less than predetermined threshold value Pt, now mean
The reception operation of epicycle has been completed, and it will indicate that ONU receivers enter into park mode from mode of operation, so as to perform the cycle
The State Transferring of property.Hereafter, ONU receivers at S501 again to OLT report transmission state.By this behaviour moved in circles
Mode is dealt with, using the control device according to embodiment of the present invention and the improvement to ONU receivers, can effectively be subtracted
The transmission of few redundant data, reduces the process energy consumption of ONU.
Fig. 6 is the frame structure for schematically showing the downstream frame according to one embodiment of the present invention.As shown in Figure 6, under
Trip frame covers the frame and the frame to each different ONU group of the controller in control device.For the ease of the control switched to EO
System, controller can in its memory store some control information, so as to only when control signal changes just to control
Device transmission control frame.For example, when different ONU joints send or stop sending data or exiting, to different ONU groups
Business will change, and now OLT can send new control frame to controller.Based on the control frame for receiving, controller comes
Control EO is switched to different ONU groups and is sent corresponding frame.
Further, the downstream frame can also include shown synchronization frame.The synchronization frame is used to provide outside to all of ONU
Synchronizing signal, and it guarantees the correct timing relationship between all of ONU.As mentioned, the number of synchronization frame can
Associated with the precision with local clock.If the precision of local clock is relatively low, more synchronization frames can be sent and come to local
Clock is corrected, but such synchronization frame receives the park mode time that certainly will reduce ONU receivers, extra so as to cause
Energy consumption.
Fig. 7 is the flow process for schematically showing the method 700 for Optical Access Network according to one embodiment of the present invention
Figure, the method 700 can be performed by the control device according to embodiment of the present invention.As shown in Figure 7, in step S701
In, method 700 receives the control signal from OLT.Then, in step S702, method 700 controls EO based on control signal
Switch, to switch to multigroup ONU via the EO downstream signal for belonging to each group ONU is sent respectively.By method 700, can
To remove due to the brought redundant data of broadcast transmission, so as to be effectively reduced power consumption.
Fig. 8 is the flow process for schematically showing the method 800 for ONU transceiver according to one embodiment of the present invention
Figure.As shown in figure 8, in step S801, the power of 800 pairs of downstream signals for receiving of method is monitored, to control ONU
The ONU receivers of transceiver are in mode of operation or park mode, wherein the ONU belongs to an ONU group and receives
Downstream signal is belonging to the downstream signal of this group of ONU.In step S802, method 800 is being in dormancy when the ONU receivers
The local clock pulses synchronous with reception are produced during pattern, so as to the optical network unit transmitter of the optical network unit transceiver
When the optical network unit receiver is in park mode, the stream signal is sent based on the local clock pulses.
Although not shown, in one embodiment, power is monitored including the downstream signal power that will be received
It is compared with predetermined threshold, and based on the control ONU receivers that compare in mode of operation or park mode.
In another embodiment, method 800 may further include to receive and come from the frame synchronizing signal of OLT, so as to it is local when
Clock signal is corrected, wherein the clock accuracy of the local clock pulses is associated with the number of frame synchronizing signal.
By the extension in method 800 and its multiple embodiments as above, the ONU transmitting-receivings of embodiment of the present invention
Device can be based on local clock come quick recovered clock synchronization, during so as to the park mode that low-power consumption is in when ONU receivers,
ONU transmitters remain to perform transmission stream signal based on the synchronizing signal of local clock offer.
Fig. 9 is the energy ratio for schematically showing embodiment of the present invention and existing PON under different number ONU groups
Diagram.Because the energy consumption in ONU is occurred mainly in mode of operation, here will according to the embodiment of the present invention in mode of operation
Obtained in energy consumption be compared with the energy consumption obtained in mode of operation under typical case's PON frameworks.Assume the mode of operation time
For of the invention and existing PON frameworks are all identicals, and the ONU numbers that OLT is supported are M.The number of ONU groups is
N, and the working time of each group is identical, is P0 independently of the basic power consumption of data receiver, and for data receiver
Power consumption be the ratio of P1, P0 and P1 be β, i.e. β=P0/P1.Previously the power consumption in ONU mode of operations was 5W, i.e. P1+P0=
5W。
According to the embodiment of the present invention, because control device is active, so as to power consumption can be expressed as EDFA and control
The sum of device power consumption processed, it is defined as Pc, and wherein EDFA is used to compensating the loss of EO switches, and its power is 5-10W, controller
Power be about 7-12W.In order to provide general result, defined parameters γ=Pc/P1.If the number of ONU is larger,
The power consumption for introducing controller and increasing can be due to averagely becoming relatively low between ONU.
● the energy consumption in typical PON frameworks
Because Optical Distribution Network (ODN) is passive, therefore power herein is zero.In pon, ONU receives all
The data of the ONU of work, so as to power consumptions P_act1 of the ONU in mode of operation is 5W, so as to the total power consumption of ODN+ONU is：P_
Total1=M × P_act1=M × (β+1) × P1=M × 5=5M (W)；
● according to the energy consumption of embodiment of the present invention
Control device is active, and the mean power of each ONU is P_act2, P_act2=(β+1/N+ γ/M) × P1.
The total power consumption of the power consumption of the ONU in park mode as little as 0.2W, control device and ONU is：M×(β+1/N+γ/M)×P1
The energy ratio of embodiment of the present invention and typical case's PON frameworks is (β+1/N+ γ/M)/(β+1).
Hypothesis M=32, γ=5, the energy that the control device by ONU after average increases is P1 × γ/M.When M is larger,
The power will be relatively low.Can be seen that when group number increases from the result shown in Fig. 9, energy ratio reduces, so as to the energy of the present invention
Amount efficiency is improved relative to existing PON.When β reduces, the energy ratio for being related to receiving data reduces, so as to the energy of the present invention
Amount efficiency is also improved relative to existing PON.Due to the complexity and cost of EO switches, the situation of N=4 discussed herein and 8.
1. when N is 4
When β=0.4, the energy efficiency of embodiment of the present invention is 0.58, and works as β=1, and the energy efficiency is 0.7, from
And after all of ONU to be divided into four groups, the energy of close 30-42% can be saved.
2. when N is 8
When β=0.4, the energy efficiency of embodiment of the present invention is 0.51, and works as β=1, and the energy efficiency is 0.66,
So as to after all of ONU to be divided into eight groups, the energy of close 34-49% can be saved.
When the number of ONU is larger and during γ/M very littles, will be become according to the energy efficiency that embodiment of the present invention is obtained
Obtain very high.Due to supporting more users, the power consumption that embodiment of the present invention is obtained is relatively low.Connect when optimization ONU is continued
Receive device in power consumption when, for example reduce independently of data receiver basic training take, that is, reduce β value, then when ONU groups number be four
When, energy saves ratio will be more than 50%.
To sum up, carried out in detail to each embodiment of the present invention and by its notable technique effect for bringing with reference to accompanying drawing
Thin description.It will be appreciated by those skilled in the art that embodiments of the present invention can by hardware, software, firmware, module or
Person it is implemented in combination in.
It should be noted that in order that the present invention is easier to understand, above description is eliminated for those skilled in the art
For be more specifically some ins and outs for being likely necessary of realization known and for the present invention.
Although it is disclosed that only certain exemplary embodiments of this invention, but it will be appreciated by those skilled in the art that can be for specific
Embodiment is made a change without departing from the spirit and scope of the present invention.Therefore, the invention is not restricted to specific embodiment,
And claims include any and all such application in the scope of the invention, modification and embodiment.
Claims (13)
1. a kind of control device for Optical Access Network, including：
Combiner, is configured to receive the downstream signal for coming from optical line terminal and sends upstream letter to the optical line terminal
Number；
The electrooptical switching being connected with combiner respectively and controller, wherein the controller is configured to based in downstream signal
Control signal belongs to the downstream signal of each group optical network unit controlling the electrooptical switching to send to multigroup optical network unit；
And
Multiple optical filters, are configured to be connected with multiple output ports of the electrooptical switching, so as to multigroup optical-fiber network list
Unit sends and belongs to the downstream signal of each group optical network unit, and is connected with the combiner, is come from sending to combiner
The stream signal of multigroup optical network unit,
When the receiver of the optical network unit wherein in multigroup optical network unit is in park mode, the stream signal
Local clock pulses based on corresponding optical network unit.
2. control device according to claim 1, wherein the combiner includes wavelength division multiplexer or Optical circulator.
3. control device according to claim 1, further includes fiber amplifier, and it is connected to the combiner and electricity
Between photoswitch, it is configured to be amplified downstream signal.
4. control device according to claim 1, wherein the downstream signal is included for the control of the control device
Frame signal and the frame signal for each group optical network unit.
5. a kind of method for Optical Access Network, including：
Receive the control signal from optical line terminal；
Electrooptical switching is controlled based on the control signal, to send out respectively to multigroup optical network unit via the electrooptical switching
Send the downstream signal for belonging to each group optical network unit；Wherein category is sent respectively to multigroup optical network unit via the electrooptical switching
Include in the downstream signal of each group optical network unit：Via the electrooptical switching and the multiple output ends with the electrooptical switching
Multiple optical filters of mouth connection send respectively the downstream signal for belonging to each group optical network unit to multigroup optical network unit；And
The stream signal for coming from multigroup optical network unit is sent to the optical line terminal via the plurality of optical filter, its
In the receiver of optical network unit in multigroup optical network unit when being in park mode, the stream signal is based on phase
Answer the local clock pulses of optical network unit.
6. a kind of optical network unit transceiver, including：
Optical network unit transmitter, is configured to send stream signal；
Optical network unit receiver, it includes：
Optical power monitoring module, the power for being configured to the downstream signal to receiving is monitored, to control the light net
Network unit receiver is in mode of operation or in park mode, wherein the optical network unit belongs to an optical network unit group
And the downstream signal for receiving is belonging to the downstream signal of this group of optical network unit；And
Local clock module, is configured to the generation when the optical network unit receiver is in park mode synchronous with reception
Local clock pulses, so that the optical network unit transmitter is when the optical network unit receiver is in park mode, base
The stream signal is sent in the local clock pulses.
7. optical network unit transceiver according to claim 6, wherein the optical power monitoring module is configured to connect
Downstream signal power and the predetermined threshold for receiving is compared, and compares the control optical network unit receiver based on described
In mode of operation or park mode.
8. optical network unit transceiver according to claim 6, wherein the local clock module is further configured to connect
Receipts come from the frame synchronizing signal of optical line terminal, to be corrected to local clock pulses.
9. optical network unit transceiver according to claim 8, wherein the clock accuracy and frame of the local clock module
The number association of synchronizing signal.
10. a kind of method for optical network unit transceiver, including：
The power of the downstream signal to receiving is monitored, so that the optical network unit for controlling optical network unit transceiver is received
Device is in mode of operation or park mode, wherein the optical network unit belongs to an optical network unit group and receives down
Trip signal is belonging to the downstream signal of this group of optical network unit；And
The local clock pulses synchronous with reception are produced when the optical network unit receiver is in park mode, so as to described
The optical network unit transmitter of optical network unit transceiver the optical network unit receiver be in park mode when, based on institute
State local clock pulses to send stream signal.
11. methods according to claim 10, wherein being monitored to power including the downstream signal power that will be received
It is compared with predetermined threshold, and based on the control optical network unit receiver that compares in mode of operation or dormancy
Pattern.
12. methods according to claim 10, further include to receive the frame synchronizing signal for coming from optical line terminal, with
Just local clock pulses are corrected.
13. methods according to claim 10, wherein the clock accuracy of the local clock pulses and frame synchronizing signal
Number is associated.
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| CN104378194A (en) * | 2014-11-26 | 2015-02-25 | 重庆金美通信有限责任公司 | Optimization method for mutual synchronization algorithm |
| CN108337066A (en) * | 2017-12-27 | 2018-07-27 | 北京格林威尔科技发展有限公司 | Optic fiber converter and fibre-optic transmission system (FOTS) |
| CN109302230B (en) * | 2018-10-30 | 2020-09-08 | 新华三技术有限公司 | Optical interface calibration method and device |
| CN110401885A (en) * | 2019-08-19 | 2019-11-01 | 深圳市双翼科技股份有限公司 | A kind of optical power control system in PON communication |
| CN114967512A (en) * | 2021-02-23 | 2022-08-30 | 华为技术有限公司 | Power supply control method, device and equipment |
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| CN1859438A (en) * | 2005-09-23 | 2006-11-08 | 华为技术有限公司 | Operation method for passive optic network user terminal |
| CN102771067A (en) * | 2009-12-21 | 2012-11-07 | 诺基亚西门子通信公司 | Method and apparatus for preventing signal interference in a passive optical network |
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| CN1859438A (en) * | 2005-09-23 | 2006-11-08 | 华为技术有限公司 | Operation method for passive optic network user terminal |
| CN102771067A (en) * | 2009-12-21 | 2012-11-07 | 诺基亚西门子通信公司 | Method and apparatus for preventing signal interference in a passive optical network |
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