CN105703834A - Method and device for controlling light power - Google Patents
Method and device for controlling light power Download PDFInfo
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- CN105703834A CN105703834A CN201410710281.XA CN201410710281A CN105703834A CN 105703834 A CN105703834 A CN 105703834A CN 201410710281 A CN201410710281 A CN 201410710281A CN 105703834 A CN105703834 A CN 105703834A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/293—Signal power control
- H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
- H04B10/296—Transient power control, e.g. due to channel add/drop or rapid fluctuations in the input power
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Abstract
The present invention discloses a method and device for controlling optical power applied to an optical burst transmission network (OBTN). The method comprises the steps that the main node of the OBTN updates a bandwidth map and obtains the number of the burst optical signals outputted by each node in a (N+1)th time period according to the updated bandwidth map, wherein N is an integer larger than or equal to 1; the main node determines the change ratio of optical power outputted to a line by each node according to the number of the burst optical signals outputted by each node in the (N+1)th time period and the optical power of each optical signal entering into line transmission; the main node determines the number of the non-burst optical signals outputted by each node in the (N+1)th time period according to the change ratio of each node; and the main node controls each node to transmit a corresponding number of non-burst optical signals in the (N+1)th time period according to the number of the non-burst optical signals outputted by each node in the (N+1)th time period. According to the method and device, the fluctuation range of the optical power of the OBTN is reduced. .
Description
Technical field
The present invention relates to optical-fiber network technology, the method and apparatus of the control luminous power of espespecially a kind of light burst mode transmission net (OBTN, OpticalBurstTransportNetwork)。
Background technology
Global data flow explosive growth, fast-developing with the emerging service that video and streaming media service are representative, make dynamically, the data service of high bandwidth and high-quality requirement becomes network traffics main body, and drive network to packetizing evolution。In transmitting net, it can be seen that, from traditional SDH (SDH, SynchronousDigitalHierarchy) circuit-switched network, develop into the multi-service transport platform based on SDH (MSTP, Multi-ServiceTransferPlatform) possessing multi service access function, and progressively evolution Packet Transport Network (PTN up to now, PacketTransportNetwork), the result of network flow dataization development just。Searching to the bottom, circuit-switched network is only provided that the pipeline of rigidity and coarseness exchange, it is impossible to effectively meet the dynamic of data service and sudden demand, and the flexible duct of packet switching network and statistic multiplexing characteristic, is natural be adapted to data service。But, current packet switch is substantially based on what electric layer processed, and cost is high, and greatly, along with the quickly growth of flow, it processes bottleneck and day by day highlights energy consumption, it is difficult to adapt to the needs of future network high speed, flexible, low cost and low energy consumption。Optical-fiber network possesses the advantage of low cost, low energy consumption and high-speed high capacity, but traditional optical circuit exchange network is (such as wavelength-division multiplex (WDM, and optical transfer network (OTN WavelengthDivisionMultiplexing), OpticalTransportNetwork) rigid conduit of big granularity only it is provided that, lack the motility of electricity packet switch, it is impossible to effective bearing data service。
In Access Network, gigabit passive optical network (GPON, Gigabit-CapablePassiveOpticalNetwork) technology combines the advantage of photosphere and electric layer to a certain extent。At down direction, it adopts the mode that photosphere is broadcasted, by optical line terminal (OLT, OpticalLineTerminal) downstream signal sent is distributed to each optical network unit (ONU by optical branching device, OpticalNetworkUnit), meanwhile, descending frame head is carried the bandwidth map of uplink frame, to indicate transmission time and the length of each ONU upstream data；At up direction, each ONU sends data according to bandwidth map instruction, through photo-coupler multiplexing a to wavelength channel and be uploaded to OLT。So, GPON mono-aspect possesses the feature of photosphere high-speed high capacity and low cost, on the other hand, achieves the photosphere statistic multiplexing of multichannel data in the upstream direction, improves motility and bandwidth availability ratio。GPON is generally adopted star/tree-like networking topology, and its operation principle is suitable for the carrying multiple spot convergent type flow (north and south flow is occupied an leading position) to single-point, and therefore succeed application and large scale deployment in Access Network。
But, for non-aggregate type application scenarios, such as Metro core network and data central interior exchange network, East and West direction flow accounting is very big, even occuping leading position, GPON technology is clearly unaccommodated (East and West direction flow needs OLT electric layer to forward, and GPON finite capacity)。Light burst mode transmission net (OBTN, OpticalBurstTransportNetwork) adopt based on light burst (OB, OpticalBurst) all-optical switching technique, the on-demand offer of light layer bandwidth and fast dispatch ability between network arbitrary node pair are provided, the dynamically adapting to various flows (such as north-south burst flow, East and West direction burst flow etc.) scene and good support can be realized, the level of resources utilization and network flexibility can be promoted, the advantage simultaneously retaining photosphere high-speed high capacity and low cost, and it is applicable to star/tree-like/annular various network topologies。Fig. 1 is 4 node OBTN unidirectional ring network schematic diagrams, each node configures a pair fast tunable sudden transmitter and fast tunable burst receiver (being extended to multiple), whole net has two wavelength as data channel, and a wavelength is as controlling passage, and node A is host node。OBTN technical characteristic is summarized as follows:
(1) transmission unit most basic in data channel is OB。Having guard time between OB as interval, some OB form a Frame, and the corresponding OB frame of different wave length passage and OB time slot original position need alignment。Data channel adopts burst mode optical receivers/transmitter, and bursty data is that photosphere direct transfers between sourcesink node pair, it is not necessary to intermediate node is made electric layer and forwarded。Source needs client-side data bag to be converged and encapsulated to OB transmission。
(2) control passage to be separated with data channel。OBTN adopts independent wavelength channel carrying control information, including oam (OAM, OperationsAdministrationandMaintenance) information, for collecting the Bandwidth Report of each node bandwidth request and indicating each node to send/receive the bandwidth map of data, and control frame sends prior to corresponding Frame。Controlling passage can adopt common photoreceiver/transmitter as transceiver, carries out electrical domain process at each node, controls information accordingly to receive and to update。
(3) fast tunable optical device is adopted to realize the All-optical switching based on OB。OBTN node can quickly regulate the transmitting/reception wavelength of (ns (nanosecond) level) emittor/receiver, to select corresponding wavelength and OB time slot to carry out bursty data transmission/reception according to bandwidth map, to realize the All-optical switching based on OB。
(4) the Real-Time Optical layer resource scheduling of traffic aware。OBTN adopts centerized fusion mode, each periodically reported bandwidth request to host node by control frame from node, host node carries out wavelength and the distribution of OB time slot according to current resource status and Bandwidth Allocation Policy, and allocation result is charged to bandwidth map, it is distributed to each from node again by control frame, to realize photosphere resource fast dispatch according to traffic demand。
The fast dispatch of photosphere resource in OBTN network, causes that in data channel, paroxysmal fluctuation occurs luminous power, and fluctuation range is big。Current OBTN network adopts the optical amplifier apparatus that burst adapts to, and the conjunction glistening light of waves power in circuit is amplified, but the burst optical amplifier apparatus cost of optical power fluctuation is high on a large scale, and technical difficulty is high, not easily realizes。
Summary of the invention
In order to solve the problems referred to above, the present invention proposes a kind of method and apparatus controlling luminous power, it is possible to reduce the fluctuation range of the luminous power of OBTN network。
In order to achieve the above object, the present invention proposes a kind of method controlling luminous power, is applied to light burst transfer net OBTN, including:
The host node of OBTN updates bandwidth map, obtains, according to the bandwidth map after updating, the burst luminous signal number that each node exports in the time period at (N+1)；N is the integer more than or equal to 1；
According to the burst luminous signal number of output in each node (N+1) time period and the optical signal number of N time period interior output, host node determines that each node exports the change ratio of the luminous power on circuit；
Host node (N+1) non-burst optical signal number in the time period according to the change each node of ratio-dependent of each node；
Host node, according to (N+1) of each node determined non-burst optical signal number in the time period, controls the non-burst optical signal of transmission corresponding number in each node (N+1) time period。
Preferably, described node is described (N+1) light number burst light number sum with the straight-through data forwarding other nodes that happens suddenly that in the time period, described node transmits for data at the burst luminous signal number that described (N+1) exported in the time period。
Preferably, also include before the method:
Host node determines the non-burst optical signal number of output in each node first time period。
Preferably, in described each node first time period, the non-burst optical signal number of output meets formula
Wherein, A1For maximum output burst luminous signal number required in any one node first time period in light burst mode transmission net OBTN, X1For non-burst optical signal number required in any one node first time period described, P1The minimum optical power of the wave multiplexer of described node, P it is input to for any burst luminous signal2Be input to the minimum optical power of the wave multiplexer of described node, the ratio between maximum luminous power and the minimum optical power of any channel of C for any non-burst optical signal, B is the input transient response multiple of the Output optical power amplifier of described node。
Preferably, described host node includes according to the non-burst optical signal number of the change each node of ratio-dependent of each node:
The non-burst optical signal number of each node determined meets formula
Wherein, A2For output burst luminous signal number required in any one node N time period, P1The minimum optical power of the wave multiplexer of described node, X it is input to for any burst luminous signal2For the non-burst optical signal number of output, P in the described node N time period2The minimum optical power of the wave multiplexer of described node, A it is input to for described any non-burst optical signal3For the burst luminous signal number of output required in (N+1) time period of described node, X3For the non-burst optical signal number of output in described node (N+1) time period, B is the input transient response multiple of the Output optical power amplifier of described node, the ratio between maximum luminous power and the minimum optical power of any channel of C。
Preferably, described host node, according to (N+1) of each node determined non-burst optical signal number in the time period, controls the non-burst optical signal of transmission corresponding number in each node (N+1) time period and includes:
Described host node is according to (N+1) of described each node non-burst optical signal number in the time period, generate control frame information, by the control frame carrying control frame information exported, control each node (N+1) and in the time period, open or close the non-burst optical signal transmitting element being pre-configured with of corresponding number。
The invention allows for a kind of method amplifying burst luminous signal, including:
One or more non-burst optical signals of continuous transmission on the circuit of light burst transfer net OBTN。
Preferably, the maximum output burst luminous signal number of any one node of described OBTN, the number of non-burst optical signal and the input transient response multiple of Output optical power amplifier meet formula
Wherein, A1For the maximum output burst luminous signal number needed for any node in light burst mode transmission net OBTN network, X1For the non-burst optical signal number needed for described node, P1The minimum optical power of the wave multiplexer of described node, P it is input to for described burst luminous signal2The minimum optical power of the wave multiplexer of described node it is input to for described non-burst optical signal, C is the ratio between maximum and the minima of the luminous power of wave multiplexer any one optical signal of input of described node, and B is the input transient response multiple of the Output optical power amplifier of described node。
The invention allows for a kind of host node, at least include:
More new module, is used for updating bandwidth map；
Acquisition module, for obtaining, according to the bandwidth map after updating, the burst luminous signal number that each node exports in the time period at (N+1)；N is the integer more than or equal to 1；
Determine module, for the optical signal number according to the interior output of the burst luminous signal number exported in each node (N+1) time period and N time period, and the luminous power of each optical signal entrance line transmission determines that each node exports the change ratio of the luminous power on circuit；(N+1) of the change ratio-dependent each node according to each node non-burst optical signal number in the time period；
Control module, for according to (N+1) of each node determined non-burst optical signal number in the time period, controlling the non-burst optical signal of transmission corresponding number in each node (N+1) time period。
Preferably, described determine that module is additionally operable to:
Determine the non-burst optical signal number of output in described each node first time period。
Preferably, described determine module specifically for:
The change ratio of each node is determined according to the burst luminous signal number of output in each node (N+1) time period and the optical signal number of N time period interior output；
According to formulaDetermine the non-burst optical signal number of output in each node (N+1) time period；
Wherein, A2For output burst luminous signal number required in any one node N time period, P1The minimum optical power of the wave multiplexer of described node, X it is input to for any burst luminous signal2For the non-burst optical signal number of output, P in the described node N time period2The minimum optical power of the wave multiplexer of described node, A it is input to for described any non-burst optical signal3For the burst luminous signal number of output required in (N+1) time period of described node, X3For the non-burst optical signal number of output in described node (N+1) time period, B is the input transient response multiple of the Output optical power amplifier of described node, the ratio between maximum luminous power and the minimum optical power of any channel of C。
Preferably, described control module specifically for:
(N+1) according to each node determined non-burst optical signal number in the time period, generate control frame information, by the control frame carrying control frame information exported, control each node (N+1) and in the time period, open or close the non-burst optical signal transmitting element being pre-configured with of corresponding number。
The invention allows for a kind of node, at least include: non-burst optical signal transmitting element and/or non-burst optical signal receive unit；
Wherein, non-burst optical signal transmitting element, for sending or not sending non-burst optical signal under the control of host node；
Non-burst optical signal receives unit, for receiving the non-burst optical signal of correspondence。
Compared with prior art, the present invention includes: the host node of OBTN updates bandwidth map, obtains, according to the bandwidth map after updating, the burst luminous signal number that each node exports in the time period at (N+1)；N is the integer more than or equal to 1；Host node is according to the optical signal number of output in the burst luminous signal number exported in each node (N+1) time period and N time period, and the luminous power of each optical signal entrance line transmission determines that each node exports the change ratio of the luminous power on circuit；Host node (N+1) non-burst optical signal number in the time period according to the change each node of ratio-dependent of each node；Host node, according to (N+1) of each node non-burst optical signal number in the time period, controls the non-burst optical signal of transmission corresponding number in each node (N+1) time period。Pass through the solution of the present invention, host node controls, according to the burst luminous signal number of each node, the non-burst optical signal that each node-node transmission is corresponding, control within the specific limits thus the Output optical power of each node is changed ratio, namely reduce the fluctuation range of the luminous power of OBTN network。
Or, the present invention includes: one or more non-burst optical signals of continuous transmission on the circuit of OBTN。By the solution of the present invention, continuous transmission non-burst optical signal between each node, thus reducing the fluctuation range of the luminous power of OBTN network。
Accompanying drawing explanation
Below the accompanying drawing in the embodiment of the present invention being illustrated, the accompanying drawing in embodiment is for a further understanding of the present invention, is used for explaining the present invention, is not intended that limiting the scope of the invention together with description。
Fig. 1 is 4 node OBTN unidirectional ring network schematic diagrams；
Fig. 2 is a kind of method flow diagram controlling luminous power of the present invention；
Fig. 3 is the method flow diagram of the another kind control luminous power of the present invention；
Fig. 4 is the structure composition schematic diagram of the host node of the present invention；
Fig. 5 is the host node of the present invention or forms schematic diagram from the structure of the specific embodiment of node；
Fig. 6 is the structure composition schematic diagram of the specific embodiment of the another kind of host node of the present invention；
The another kind that Fig. 7 is the present invention forms schematic diagram from the structure of the specific embodiment of node。
Detailed description of the invention
For the ease of the understanding of those skilled in the art, below in conjunction with accompanying drawing, the invention will be further described, can not be used for limiting the scope of the invention。It should be noted that when not conflicting, the embodiment in the application and the various modes in embodiment can be mutually combined。
Referring to Fig. 2, the present invention proposes a kind of method controlling luminous power, is applied to OBTN, and the method includes:
Step 200, OBTN host node determine the non-burst optical signal number of output in each node first time period。
In this step, in each node first time period, the non-burst optical signal number of output meets formula (1)。
Wherein, A1For maximum output burst luminous signal number required in any one node first time period in light burst mode transmission net OBTN, X1For non-burst optical signal number required in any one node first time period, P1The minimum optical power of the wave multiplexer of described node, P it is input to for any burst luminous signal2The minimum optical power of the wave multiplexer of node it is input to for any non-burst optical signal, C is the ratio between maximum and the minima of the luminous power of wave multiplexer any one optical signal of input of node, and B is the input transient response multiple of the Output optical power amplifier of described node。
Wherein, for the stable transmission of each wavelength channels wavelength-division multiplex in OBTN network, generally, burst luminous signal be input to the luminous power of wave multiplexer be input to non-burst optical signal wave multiplexer luminous power dynamic range keep consistent。
Wherein, the input transient response multiple of the Output optical power amplifier of this node refers to the burst response change multiple of the luminous power being input to Output optical power amplifier
The maximum amplification sum of input optical power amplifier and Output optical power amplifier can be the luminous power insertion loss of the wave multiplexer of a upper node, a upper node to the luminous power insertion loss of optical fiber between this node, the luminous power insertion loss of channel-splitting filter of this node, this node the luminous power insertion loss of the array of photoswitch optical power attenuation multiple corresponding with each fibre-optical splice luminous power insertion loss sum。
Such as, in Fig. 1, the luminous power insertion loss of the wave multiplexer of known node D is 6dB, between node D to node A, light fiber optical power insertion loss is 10dB, the luminous power insertion loss of first channel-splitting filter of node A is 6dB, the luminous power insertion loss of second channel-splitting filter of node A is 6dB, and the luminous power insertion loss of the optical burst swit-ching unit of node A is 3dB, and the luminous power insertion loss for each fibre-optical splice of equipment room connection adds up to 3dB。
It can thus be appreciated that the optical signal input loss from the optical signal input of the wave multiplexer of node D to the wave multiplexer of node A adds up to (6+10+6+6+3+3=34dB)。The input optical power amplifier that can configure node A is fixed gain+17dB, the Output optical power amplifier that can arrange node D is fixed gain+17dB, the power amplifier of node A and node D all adopts (EDFA, Erbium-dopedOpticalFiberAmplifier) erbium-doped fiber amplifier。Choosing the Output optical power amplifier responding range of the Output optical power amplifier of node D is 10dB (dB is the transient response multiple of power amplifier, and 10dB is 10 times)。Then the starting point of node D is configured to 0 (-34dB+17dB+17dB) to the optical power loss between the end point in node A。If namely the burst luminous signal of node D is X at the optical power value of starting point, the optical burst swit-ching unit at A node leads directly to, and the optical power value of the end point arriving node A is still X。
Such as, in Fig. 1, in the OBTN network of unidirectional loop, host node A export from node B, from node B export from node C, from node C export from node D, the maximum that exports the burst luminous signal number from node A from node D be all 16 wavelength channels, then A1=16, the difference between maximum luminous power and the minimum optical power of any channel is 3dB, then C=2, and all configures each node and meet P1=P2, the responding range of the Output optical power amplifier of four nodes is 10dB, then B=10。Respectively each parameter of node A, B, C, D is substituted into formula (1), obtain result and be X1>=4。Thus can obtain, it is possible in each node, configure at least X in advance1The transmitting element of the non-burst optical signal of=4 wavelength channels and corresponding non-burst optical signal receive unit。Namely have only to make host node A export from node B, export from node C from node B, export from node D from node C, export from node A from node D, meet formula (1)。This example is pre-configured with the transmitting element of non-burst optical signal and corresponding non-burst optical signal receives unit particularly as follows: node A sends, 2 non-burst wavelength signals λ 1, the λ 2 that node A receives, λ 1, λ 2 are straight-through at node B, C, D, namely in node A configuration for send non-burst wavelength signals λ 1, λ 2 transmitting element and for receiving the reception unit of non-burst wavelength signals λ 1, λ 2；Node A sends, 2 non-burst wavelength signals λ 3 of Node-B receiver, λ 4；Node B sends, 2 non-burst wavelength signals λ 3, the λ 4 that node C receives；Node C sends, 2 non-burst wavelength signals λ 3, the λ 4 that node D receives；Node D sends, 2 non-burst wavelength signals λ 3, the λ 4 that node A receives。
Transmitting element and the corresponding non-burst optical signal reception unit that can also be pre-configured with non-burst optical signal are that node A sending node B receives, node B sending node C receives, node C sending node D, node D sending node A receives, and each section all configures 4 non-burst wavelength signals λ 1, λ 2, λ 3, λ 4。
Other collocation method can also be adopted, as long as meeting X1All collocation methods of >=4 are all in protection scope of the present invention。
Step 201, host node update bandwidth map, obtain, according to the bandwidth map after updating, the burst luminous signal number that each node exports in the time period at (N+1)。
In this step, N is the integer more than or equal to 1。
In this step, node is in the burst light number sum that the burst luminous signal number that (N+1) exported in the time period is (N+1) the time period interior nodes burst light number for data transmission and the straight-through data forwarding other nodes。
Such as, in Fig. 1, the control passage transmitting-receiving of host node A and processing unit receive control frame, by obtain from control frame from node B, from node C, from the bandwidth request of node D, the bandwidth demand of the host node A produced with the customer side Service Processing Unit of host node is transferred to bandwidth map allocation units, bandwidth map allocation units carry out bandwidth distribution and calculate, and generate new bandwidth map。
After host node A generates new bandwidth map, assume that bandwidth map information is that (N+1) is in the time period, needing the node A burst luminous signal number exported is 0 wavelength, the burst luminous signal number of node B output is 8 wavelength, the burst luminous signal number of node C output is 1 wavelength, and the burst luminous signal number of node D output is 16 wavelength, wherein, the service needed having the node D to node A of higher priority is transmitted, it is necessary to 2 wavelength transmission。
Step 202, host node are according to the optical signal number of output in the burst luminous signal number exported in each node (N+1) time period and N time period, and the luminous power of each optical signal entrance line transmission determines that each node exports the change ratio of the luminous power on circuit。
In this step, the change ratio of node is the ratio of the burst luminous signal number of output in the optical signal number and (N+1) time period exported in the N time period。
Wherein, in the N time period, the optical signal number of output is the sum in the N time period between burst luminous signal number and the non-burst optical signal number of output。
Assume in this example, as it is shown in figure 1, within the N time period, the burst luminous signal number of node A output is 16 wavelength, and non-burst optical signal λ 1, λ 2 have already turned on；The burst luminous signal number of node B output is 16 wavelength, it does not have open non-burst optical signal λ 3, λ 4；The burst luminous signal number of node C output is 16 wavelength, it does not have open non-burst optical signal λ 3, λ 4；The burst luminous signal number of node D output is 16 wavelength, it does not have open non-burst optical signal λ 3, λ 4, then in node A, node B, node C, node D N time period, the optical signal number of output is 18。
Step 203, host node (N+1) non-burst optical signal number in the time period according to the change each node of ratio-dependent of each node。
In this step, the non-burst optical signal number of node meets formula (2)。
Wherein, A2For output burst luminous signal number required in this node N time period, P1The minimum optical power of the wave multiplexer of this node, X it is input to for burst luminous signal2For the non-burst optical signal number of output, P in this node N time period2The minimum optical power of this node wave multiplexer, A it is input to for non-burst optical signal3For the burst luminous signal number of output required in (N+1) time period of this node, X3For the non-burst optical signal number of output in this node (N+1) time period, B is the input transient response multiple of the Output optical power amplifier of this node, and C is the ratio between maximum luminous power and the minimum optical power of any channel。
Concrete, C can be the ratio between maximum and the minima of the luminous power of wave multiplexer any one optical signal of input of arbitrary node。Such as, the reference optical power at any one optical channel of the wave multiplexer input of arbitrary node is (-8dBm)～(-11dBm), then between maximum and the minima of luminous power, difference is 3dB, then C=2。
In this example, host node is as follows according to formula (2) result of calculation, it is clear that A2、A3、X2、X3It is the integer be more than or equal to 0。
In node A, A2=16, A3=0, X2=2, P1=P2, B=10, then X3>=3.6, it is possible to take X3=4；
In node B, A2=16, A3=8, X2=2, P1=P2, B=10, then X3>=0, it is possible to take X3=0；
In node C, A2=16, A3=1, X2=2, P1=P2, B=10, then X3>=2.6, it is possible to take X3=3；
In node D, A2=16, A3=16, X2=2, P1=P2, B=10, then X3>=0, it is possible to take X3=0。
Step 204, host node, according to (N+1) of each node non-burst optical signal number in the time period, control the non-burst optical signal of transmission corresponding number in each node (N+1) time period。
In this example, according to the result of step 203, host node obtains proceeding as follows in (N+1) time period domestic demand:
It is constant that host node A stays open non-burst wavelength signals λ 1, λ 2, increases newly and opens the non-burst wavelength signals λ 3 of this node, λ 4；
Node-B receiver host node controls information, is failure to actuate；
Node C receives host node and controls information, the newly-increased non-burst wavelength signals λ 3 or λ 4 opening this node；
Node D receives host node and controls information, because there being the service needed of the node D to node A of higher priority to transmit, it is necessary to 2 wavelength transmission。The non-burst wavelength signals λ 3 and λ 4 that open this node can be increased newly and transmit high-priority service。
In this step, host node according to (N+1) of each node in the time period non-burst optical signal number open or close the non-burst optical signal transmitting element being pre-configured with。
In this step, it is possible to configure non-burst optical signal transmitting element in one or more nodes in advance and corresponding non-burst optical signal receives unit。Such as, in node A, it is pre-configured with non-burst optical signal transmitting element and non-burst optical signal receives unit。Obtain at (N+1) in the time period if node A calculates, need one non-burst optical signal of transmission in the nodeb, need to transmit two non-burst optical signals in node C and node D, then node A opens non-burst optical signal transmitting element at (N+1) in the time period, make it send two non-burst optical signals, then two the non-burst optical signals opened finally are transferred to node A through node B, node C and node D and are received unit reception by the non-burst optical signal of node A。
In this step, the wavelength of non-burst optical signal can be any wavelength of the non-burst optical signal not having use in (N+1) time period。
In this step, non-burst optical signal can be asemantic optical signal, it is also possible to be the optical signal transmitting any information。
In this step, non-burst optical signal can the higher business datum of transmission priority, it is also possible to as fixing communication channel。
In this step, host node can adopt the mode of transmission control frame to control each node and open or close non-burst optical signal。Specifically, host node is according to (N+1) of each node non-burst optical signal number in the time period, by the control frame carrying control frame information exported, control each node (N+1) and in the time period, open or close the non-burst optical signal transmitting element being pre-configured with of corresponding number。Wherein, the mark that control frame information can include node identification, one or more non-burst optical signal transmitting elements of instruction node open or close。Wherein, node identification can be nodename, the mark that one or more non-burst optical signal transmitting elements of instruction node open or close can comprise two parts, and part instruction is to need to open or close, and another part is the mark of non-burst optical signal transmitting element。
So, after each node receives control frame, the corresponding relation of control frame is searched the mark that the instruction of self correspondence opens or closes, thus carrying out the opening and closing of non-burst optical signal。
In the method for the present invention, each node opens or closes non-burst optical signal at (N+1) under the control of host node in the time period, and (N+2) bandwidth request in the time period is sent to next node。
Referring to Fig. 3, the invention allows for a kind of method controlling luminous power, including:
Step 300, on the circuit of OBTN one or more non-burst optical signals of continuous transmission。
In this method, it is possible to configure non-burst optical signal transmitting element in one or more nodes in advance and corresponding non-burst optical signal receives unit。
Also include before the method:
Step 301, determine the number of non-burst optical signal according to the maximum number of burst luminous signal and the input transient response multiple of Output optical power amplifier。
In the method for the present invention, it is possible to determine that according to the number of non-burst optical signal the non-burst optical signal transmitting element being pre-configured with and corresponding non-burst optical signal receive the number of unit。
Specifically, the maximum number of burst luminous signal, the number of non-burst optical signal and the input transient response multiple of Output optical power amplifier meet formula (1)。
With reference to upper example, in the OBTN network of the unidirectional loop similarly configured, host node A export from node B, from node B export from node C, from node C export from node D, the maximum that exports the burst luminous signal number from node A from node D be all 16 wavelength channels, then A1=16, the difference between maximum luminous power and the minimum optical power of any channel is 3dB, then C=2, and all configures each node P1=P2, the Output optical power amplifier responding range of the Output optical power amplifier of four nodes is 10dB then B=10。Respectively each parameter of node A, B, C, D is substituted into formula (1), obtain result and be X1>=4。Thus can obtain, it is possible in each node, configure at least X in advance1The transmitting element of the non-burst optical signal of=4 wavelength channels and corresponding non-burst optical signal receive unit。Namely have only to make host node A export from node B, export from node C from node B, export from node D from node C, export from node A from node D, meet formula (1)。The transmitting element and the corresponding non-burst optical signal that are pre-configured with non-burst optical signal receive unit continuous transmission, such as, node A send, 4 lasting non-burst wavelength signals λ 1, the λ 2 that node A receives, λ 3, λ 4, be straight-through through node B, C, D。
Other collocation method can also be adopted, as long as meeting X1All collocation methods of >=4 are all in protection scope of the present invention。
Wherein, non-burst optical signal can be asemantic optical signal, it is also possible to be the optical signal transmitting any information。
Wherein, non-burst optical signal can the higher business datum of transmission priority, it is also possible to as fixing communication channel。
Referring to Fig. 4, the invention allows for a kind of host node, at least include:
More new module, is used for updating bandwidth map；
Acquisition module, for obtaining, according to the bandwidth map after updating, the burst luminous signal number that each node exports in the time period at (N+1)；N is the integer more than or equal to 1；
Determine module, for the optical signal number according to the interior output of the burst luminous signal number exported in each node (N+1) time period and N time period, and the luminous power of each optical signal entrance line transmission determines that each node exports the change ratio of the luminous power on circuit；(N+1) of the change ratio-dependent each node according to each node non-burst optical signal number in the time period；
Control module, for according to (N+1) of each node determined non-burst optical signal number in the time period, generating control frame information, export control frame, control the non-burst optical signal of transmission corresponding number in each node (N+1) time period。
In the host node of the present invention, it is determined that module is additionally operable to:
Determine to the non-burst optical signal number of output in node first time period。
In the host node of the present invention, it is determined that module specifically for:
The change ratio of each node is determined according to the burst luminous signal number of output in each node (N+1) time period and the optical signal number of N time period interior output；
According to formulaDetermine the non-burst optical signal number of each node；
Wherein, A2For output burst luminous signal number required in any one node N time period, P1The minimum optical power of the wave multiplexer of this node, X it is input to for any burst luminous signal2For the non-burst optical signal number of output, P in this node N time period2The minimum optical power of this node wave multiplexer, A it is input to for non-burst optical signal3For the burst luminous signal number of output required in (N+1) time period of this node, X3For the non-burst optical signal number of output in this node (N+1) time period, B is the input transient response multiple of the Output optical power amplifier of this node, and C is the ratio between maximum and the minima of the luminous power of wave multiplexer any one optical signal of input of this node.
In the host node of the present invention, control module specifically for:
(N+1) according to each node determined non-burst optical signal number in the time period, generate control frame information, by the control frame carrying control frame information exported, control each node (N+1) and in the time period, open or close the non-burst optical signal transmitting element being pre-configured with of corresponding number。
The invention allows for a kind of node, at least include: non-burst optical signal transmitting element and/or non-burst optical signal receive unit；
Wherein, non-burst optical signal transmitting element, for sending or not sending non-burst optical signal under the control of host node；
Non-burst optical signal receives unit, for receiving the non-burst optical signal of correspondence。
Wherein, non-burst optical signal transmitting element can be configured to send the non-burst optical signal of fixed wave length, and non-burst optical signal receives unit and can be configured to receive the non-burst optical signal of any wavelength。
Fig. 5 is host node or forms schematic diagram from the structure of node, referring to Fig. 5, at least includes:
Input optical power amplifier 5061, for carrying out power amplification to the conjunction wave optical signal from a upper node；
First channel-splitting filter 500, is used for the control channel wavelength closed in wave optical signal after separating amplification and data channel wavelength, control channel wavelength is sent to control passage transmitting-receiving and processing unit 504, data channel wavelength is sent to the second channel-splitting filter 501；
Second channel-splitting filter 501, for the burst luminous signal in mask data passage and non-burst optical signal, is sent to burst luminous signal optical burst swit-ching unit 502, non-burst optical signal is sent to wave multiplexer 503；
Wherein, the second channel-splitting filter can be wavelength selector (WSS, WavelengthSelectiveSwitch) or wavelength permutation grating (AWG, ArrayedWaveguideGrating)。
Control passage transmitting-receiving and processing unit 504, for receiving and resolve the control frame information controlling passage, control the optical burst swit-ching of optical burst swit-ching unit 502, receive the bandwidth demand of customer side Service Processing Unit 505, generate new control frame, control frame is sent to wave multiplexer 503；
Optical burst swit-ching unit 502, the burst luminous signal for the second channel-splitting filter 501 exports burst luminous signal and customer side Service Processing Unit 505 carries out optical burst swit-ching。Receive the order controlling passage transmitting-receiving and processing unit 504 and carry out action。The burst luminous signal that this node receives, by 502 times roads of optical burst swit-ching unit to customer side Service Processing Unit 505；The burst luminous signal that this node sends, by road on customer side Service Processing Unit 505 to optical burst swit-ching unit 502, then is exported to wave multiplexer 503 by optical burst swit-ching unit 502；The burst luminous signal that this node does not process, is issued wave multiplexer 503 by optical burst swit-ching unit 502 is straight-through。Optical burst swit-ching unit 502 can adopt fast optical switch based array to realize。
Customer side Service Processing Unit 505, carries out light burst and sends and light burst reception, also to receive client-side data and carry out data storage burst luminous signal, and bandwidth demand is sent to control passage transmitting-receiving and processing unit 504 by the bandwidth demand generating this node
Wave multiplexer 503, for controlling channel wavelength, burst luminous signal, non-burst optical signal carry out wavelength-division multiplex and close ripple, then conjunction ripple is sent to Output optical power amplifier 5062；
Output optical power amplifier 5062, after carrying out power amplification for involutory ripple, is sent to next node。
Fig. 6 is the structure composition schematic diagram of another kind of host node, referring to Fig. 6, at least includes:
Input optical power amplifier 6061, for carrying out power amplification to the conjunction wave optical signal from a upper node；
3rd channel-splitting filter 600, is used for the control passage closed in ripple after separating amplification and data channel, control passage is sent to control passage transmitting-receiving and processing unit 604, data channel is sent to the 4th channel-splitting filter 601；
4th channel-splitting filter 601, for the burst luminous signal in mask data passage and non-burst optical signal, is sent to optical burst swit-ching unit 602 by burst luminous signal, non-burst optical signal is sent to wave multiplexer 603, or is sent to non-burst optical signal reception unit 6053；
Optical burst swit-ching unit 602, the burst luminous signal for the burst luminous signal exported by the 4th channel-splitting filter 601 and customer side control unit 605 carries out optical burst swit-ching。Receive the order controlling passage transmitting-receiving and processing unit 604 and carry out action。At the burst luminous signal that this node receives, 602 times roads of optical burst swit-ching unit receive unit 6051 to the burst luminous signal of customer side control unit 605；The burst luminous signal that this node sends, by road on the burst luminous signal transmitting element 6052 of customer side control unit 605 to optical burst swit-ching unit 602, then is exported to wave multiplexer 603 by optical burst swit-ching unit 602；The burst luminous signal that this node does not process, is issued wave multiplexer 603 by optical burst swit-ching unit 602 is straight-through。Optical burst swit-ching unit 602 can adopt fast optical switch based array to realize。
Customer side control unit 605 includes burst luminous signal and receives unit 6051 and burst luminous signal transmitting element 6052, and non-burst optical signal receives unit 6053 and non-burst optical signal transmitting element 6054, client-side data processing unit 6055；
Wherein, burst luminous signal receives unit 6051 and burst luminous signal is carried out opto-electronic conversion, and burst luminous signal is carried out electro-optic conversion by burst luminous signal transmitting element 6052。
Wherein, client-side data processing unit 6055 receives client-side data and carries out data storage, being then forwarded to burst luminous signal transmitting element 6052, client-side data processing unit 6055 receives the data of burst luminous signal reception unit 6051 and carries out data storage, is then forwarded to customer side。Client-side data processing unit 6055 generates the bandwidth demand of this node, and bandwidth demand is sent to control passage transmitting-receiving and processing unit 604。
Wherein, non-burst optical signal receives unit 6053 and non-burst optical signal transmitting element 6054 is pre-configured with, and the non-burst optical signal of one or more fixed wave length is received and transmitted。The non-burst optical signal of transmission can be asemantic optical signal, it is also possible to be the optical signal carrying any information or the higher business datum of transmission priority。Client-side data processing unit 6055 receives client-side data and carries out data storage, non-burst optical signal transmitting element 6054 can be sent to be transmitted, client-side data processing unit 6055 can also receive the data of non-burst optical signal reception unit 6053 and carry out data storage, is then forwarded to customer side。
Control passage transmitting-receiving and processing unit 604, for receiving and resolve the control frame information controlling passage, each is sent to bandwidth map allocation units 607 from the bandwidth request in node subsequent time period, the bandwidth demand in this node customer side control unit 605 subsequent time period is also sent to bandwidth map allocation units 607；Burst luminous signal and the corresponding number that each node exports in subsequent time period is obtained according to the bandwidth map after updating；The burst luminous signal number exported in subsequent time period according to each node determines the non-burst optical signal number of each node, convert control frame information by each in subsequent time period to from the burst luminous signal information of node and the non-burst optical signal information of number from node determined, send control channel wavelength and give wave multiplexer 603。Control passage transmitting-receiving and this node customer side control unit 605 and optical burst swit-ching unit 602 are controlled at subsequent time period by processing unit 604 simultaneously, it is possible to open or close one or more non-burst optical signal transmitting element 6054 of this node。
Bandwidth map allocation units 607, update bandwidth map for the bandwidth request according to each node, and the bandwidth map after updating is sent to control passage transmitting-receiving and processing unit 604；
Wave multiplexer 603, for by the burst luminous signal from optical burst swit-ching unit 602, non-burst optical signal from the 4th channel-splitting filter 601, non-burst optical signal from non-burst optical signal transmitting element 6054, the control passage from control passage transmitting-receiving and processing unit 604 carry out closing ripple, and conjunction wave optical signal is sent to Output optical power amplifier 6062；
Output optical power amplifier 6062, is sent to next node after carrying out luminous power amplification for involutory ripple。
Fig. 7 is the another kind of structure composition schematic diagram from node, referring to Fig. 7, at least includes:
Input optical power amplifier 7061, for carrying out power amplification to the conjunction wave optical signal from a upper node；
5th channel-splitting filter 700, is used for the control passage closed in wave optical signal after separating amplification and data channel, control passage is sent to control passage transmitting-receiving and processing unit 704, data channel is sent to the 6th channel-splitting filter 701；
6th channel-splitting filter 701, for the burst luminous signal in mask data passage and non-burst optical signal, is sent to optical burst swit-ching unit 702 by burst luminous signal, non-burst optical signal is sent to wave multiplexer 703, or is sent to non-burst optical signal reception unit 7053；
Optical burst swit-ching unit 702, receives unit 706 for burst luminous signal is sent to burst luminous signal, or is sent to wave multiplexer 703；Burst luminous signal from burst luminous signal transmitting element 707 is sent to wave multiplexer 703；
Optical burst swit-ching unit 702, the burst luminous signal for the burst luminous signal exported by the 4th channel-splitting filter 701 and customer side Service Processing Unit 705 carries out optical burst swit-ching。Receive the order controlling passage transmitting-receiving and processing unit 704 and carry out action。At the burst luminous signal that this node receives, 702 times roads of optical burst swit-ching unit receive unit 7051 to the burst luminous signal of customer side Service Processing Unit 705；The burst luminous signal that this node sends, by road on the burst luminous signal transmitting element 7052 of customer side Service Processing Unit 705 to optical burst swit-ching unit 702, then is exported to wave multiplexer 703 by optical burst swit-ching unit 702；The burst luminous signal that this node does not process, is issued wave multiplexer 703 by optical burst swit-ching unit 702 is straight-through。Optical burst swit-ching unit 702 can adopt fast optical switch based array to realize。
Customer side control unit 705 includes burst luminous signal and receives unit 7051 and burst luminous signal transmitting element 7052, and non-burst optical signal receives unit 7053 and non-burst optical signal transmitting element 7054, client-side data processing unit 7055；
Wherein, burst luminous signal is carried out photoelectricity, electro-optic conversion by burst luminous signal reception unit 7051 and burst luminous signal transmitting element 7052。
Wherein, client-side data processing unit 7055 receives client-side data and carries out data storage, being then forwarded to burst luminous signal transmitting element 7052, client-side data processing unit 7055 receives the data of burst luminous signal reception unit 7051 and carries out data storage, is then forwarded to customer side。Client-side data processing unit 7055 generates the bandwidth demand of this node, and bandwidth demand is sent to control passage transmitting-receiving and processing unit 704。
Wherein, non-burst optical signal receives unit 7053 and non-burst optical signal transmitting element 7054 is pre-configured with, and the non-burst optical signal of one or more fixed wave length is received and transmitted。The non-burst optical signal of transmission can be asemantic optical signal, it is also possible to be the optical signal carrying any information or the higher business datum of transmission priority。Client-side data processing unit 7055 receives client-side data and carries out data storage, non-burst optical signal transmitting element 7054 can be sent to be transmitted, client-side data processing unit 7055 can also receive the data of non-burst optical signal reception unit 7053 and carry out data storage, is then forwarded to customer side。
Control passage transmitting-receiving and processing unit 704, for receiving and resolve the control frame information controlling passage。Control passage transmitting-receiving and processing unit 704 obtains this node burst luminous signal information in subsequent time period, control optical burst swit-ching unit 702 and carry out action。Control passage transmitting-receiving and processing unit 704 obtains this node non-burst optical signal information in subsequent time period, open or close one or more non-burst optical signal transmitting element 7054 of this node。Control passage transmitting-receiving and processing unit 704 also to convert the bandwidth demand in this node customer side control unit 705 subsequent time period to control frame information, send control channel wavelength and give wave multiplexer 703。
Wave multiplexer 703, for by the burst luminous signal from optical burst swit-ching unit 702, non-burst optical signal from the 6th channel-splitting filter 701, non-burst optical signal from non-burst optical signal transmitting element 7054, the control passage from control passage transmitting-receiving and processing unit 704 carry out closing ripple, and conjunction wave optical signal is sent to Output optical power amplifier 7062；
Output optical power amplifier 7062, is sent to next node after carrying out luminous power amplification for involutory ripple。
It should be noted that; embodiment described above is for only for ease of those skilled in the art and understands; it is not limited to protection scope of the present invention; under the premise without departing from the inventive concept of the present invention, those skilled in the art to the made any apparent replacement and improvement etc. of the present invention all within protection scope of the present invention。
Claims (13)
1. the method controlling luminous power, it is characterised in that be applied to light burst transfer net OBTN, including:
The host node of OBTN updates bandwidth map, obtains, according to the bandwidth map after updating, the burst luminous signal number that each node exports in the time period at (N+1)；N is the integer more than or equal to 1；
According to the burst luminous signal number of output in each node (N+1) time period and the optical signal number of N time period interior output, host node determines that each node exports the change ratio of the luminous power on circuit；
Host node (N+1) non-burst optical signal number in the time period according to the change each node of ratio-dependent of each node；
Host node, according to (N+1) of each node determined non-burst optical signal number in the time period, controls the non-burst optical signal of transmission corresponding number in each node (N+1) time period。
2. method according to claim 1, it is characterized in that, described node is described (N+1) light number burst light number sum with the straight-through data forwarding other nodes that happens suddenly that in the time period, described node transmits for data at the burst luminous signal number that described (N+1) exported in the time period。
3. method according to claim 1, it is characterised in that also include before the method:
Host node determines the non-burst optical signal number of output in each node first time period。
4. method according to claim 1, it is characterised in that in described each node first time period, the non-burst optical signal number of output meets formula
Wherein, A1For maximum output burst luminous signal number required in any one node first time period in light burst mode transmission net OBTN, X1For non-burst optical signal number required in any one node first time period described, P1The minimum optical power of the wave multiplexer of described node, P it is input to for any burst luminous signal2Be input to the minimum optical power of the wave multiplexer of described node, the ratio between maximum luminous power and the minimum optical power of any channel of C for any non-burst optical signal, B is the input transient response multiple of the Output optical power amplifier of described node。
5. method according to claim 1, it is characterised in that described host node includes according to the non-burst optical signal number of the change each node of ratio-dependent of each node:
The non-burst optical signal number of each node determined meets formula
Wherein, A2For output burst luminous signal number required in any one node N time period, P1The minimum optical power of the wave multiplexer of described node, X it is input to for any burst luminous signal2For the non-burst optical signal number of output, P in the described node N time period2The minimum optical power of the wave multiplexer of described node, A it is input to for described any non-burst optical signal3For the burst luminous signal number of output required in (N+1) time period of described node, X3For the non-burst optical signal number of output in described node (N+1) time period, B is the input transient response multiple of the Output optical power amplifier of described node, the ratio between maximum luminous power and the minimum optical power of any channel of C。
6. method according to claim 1, it is characterized in that, described host node, according to (N+1) of each node determined non-burst optical signal number in the time period, controls the non-burst optical signal of transmission corresponding number in each node (N+1) time period and includes:
Described host node is according to (N+1) of described each node non-burst optical signal number in the time period, generate control frame information, by the control frame carrying control frame information exported, control each node (N+1) and in the time period, open or close the non-burst optical signal transmitting element being pre-configured with of corresponding number。
7. the method amplifying burst luminous signal, it is characterised in that including:
One or more non-burst optical signals of continuous transmission on the circuit of light burst transfer net OBTN。
8. method according to claim 7, it is characterised in that the maximum output burst luminous signal number of any one node of described OBTN, the number of non-burst optical signal and the input transient response multiple of Output optical power amplifier meet formula
Wherein, A1For the maximum output burst luminous signal number needed for any node in light burst mode transmission net OBTN network, X1For the non-burst optical signal number needed for described node, P1The minimum optical power of the wave multiplexer of described node, P it is input to for described burst luminous signal2The minimum optical power of the wave multiplexer of described node it is input to for described non-burst optical signal, C is the ratio between maximum and the minima of the luminous power of wave multiplexer any one optical signal of input of described node, and B is the input transient response multiple of the Output optical power amplifier of described node。
9. a host node, it is characterised in that at least include:
More new module, is used for updating bandwidth map；
Acquisition module, for obtaining, according to the bandwidth map after updating, the burst luminous signal number that each node exports in the time period at (N+1)；N is the integer more than or equal to 1；
Determine module, for the optical signal number according to the interior output of the burst luminous signal number exported in each node (N+1) time period and N time period, and the luminous power of each optical signal entrance line transmission determines that each node exports the change ratio of the luminous power on circuit；(N+1) of the change ratio-dependent each node according to each node non-burst optical signal number in the time period；
Control module, for according to (N+1) of each node determined non-burst optical signal number in the time period, controlling the non-burst optical signal of transmission corresponding number in each node (N+1) time period。
10. host node according to claim 9, it is characterised in that described determine that module is additionally operable to:
Determine the non-burst optical signal number of output in described each node first time period。
11. the host node according to claim 9 or 10, it is characterised in that described determine module specifically for:
The change ratio of each node is determined according to the burst luminous signal number of output in each node (N+1) time period and the optical signal number of N time period interior output；
According to formulaDetermine the non-burst optical signal number of output in each node (N+1) time period；
Wherein, A2For output burst luminous signal number required in any one node N time period, P1The minimum optical power of the wave multiplexer of described node, X it is input to for any burst luminous signal2For the non-burst optical signal number of output, P in the described node N time period2The minimum optical power of the wave multiplexer of described node, A it is input to for described any non-burst optical signal3For the burst luminous signal number of output required in (N+1) time period of described node, X3For the non-burst optical signal number of output in described node (N+1) time period, B is the input transient response multiple of the Output optical power amplifier of described node, the ratio between maximum luminous power and the minimum optical power of any channel of C。
12. the host node according to claim 9 or 10, it is characterised in that described control module specifically for:
(N+1) according to each node determined non-burst optical signal number in the time period, generate control frame information, by the control frame carrying control frame information exported, control each node (N+1) and in the time period, open or close the non-burst optical signal transmitting element being pre-configured with of corresponding number。
13. a node, it is characterised in that at least include: non-burst optical signal transmitting element and/or non-burst optical signal receive unit；
Wherein, non-burst optical signal transmitting element, for sending or not sending non-burst optical signal under the control of host node；
Non-burst optical signal receives unit, for receiving the non-burst optical signal of correspondence。
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| 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 |
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|---|---|---|---|---|
| CN101197626A (en) * | 2006-12-08 | 2008-06-11 | 通用仪表公司 | Method and apparatus for controlling an optical amplifier for use in an passive optical network |
| CN101895345A (en) * | 2009-05-22 | 2010-11-24 | 华为技术有限公司 | Burst luminous signal amplification method, burst luminous amplifer, system and communication system |
| CN102136870A (en) * | 2010-01-22 | 2011-07-27 | 华为技术有限公司 | Method, device and system for amplifying burst optical signals |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197626A (en) * | 2006-12-08 | 2008-06-11 | 通用仪表公司 | Method and apparatus for controlling an optical amplifier for use in an passive optical network |
| CN101895345A (en) * | 2009-05-22 | 2010-11-24 | 华为技术有限公司 | Burst luminous signal amplification method, burst luminous amplifer, system and communication system |
| CN102136870A (en) * | 2010-01-22 | 2011-07-27 | 华为技术有限公司 | Method, device and system for amplifying burst optical signals |
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| 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 |
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