CN105703834B - A kind of method and host node controlling optical power - Google Patents
A kind of method and host node controlling optical power Download PDFInfo
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- CN105703834B CN105703834B CN201410710281.XA CN201410710281A CN105703834B CN 105703834 B CN105703834 B CN 105703834B CN 201410710281 A CN201410710281 A CN 201410710281A CN 105703834 B CN105703834 B CN 105703834B
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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 invention discloses a kind of method and apparatus for controlling optical power, applied to light burst transfer net OBTN, include: the host node update bandwidth map of OBTN, the burst optical signal number that each node exports within (N+1) period is obtained according to updated bandwidth map；N is the integer more than or equal to 1；Host node determines the variation ratio of optical power that each node is output on route according to the optical power that the optical signal number and each optical signal that export in the burst optical signal number and N period exported in each node (N+1) period enter line transmission；Host node is according to (N+1) non-burst optical signal number in the period of variation each node of ratio-dependent of each node；Host node controls the non-burst optical signal of transmission corresponding number in each node (N+1) period according to (N+1) of determining each node non-burst optical signal number in the period.Present invention decreases the fluctuation ranges of the optical power of OBTN network.
Description
Technical field
The present invention relates to optical-fiber network technology, espespecially a kind of smooth burst mode transmission net (OBTN, Optical Burst
Transport Network) control optical power method and host node.
Background technique
Global data flow explosive growth, it is fast-developing as the emerging service of representative using video and streaming media service, make
Dynamically, the data service that high bandwidth and high quality require becomes network flow main body, and drives network to packetizing evolution.It is passing
Send net aspect, it can be seen that from traditional synchronous digital system (SDH, Synchronous Digital Hierarchy) circuit
Exchange network develops to multi-service transport platform (MSTP, the Multi-Service based on SDH for having multi service access function
Transfer Platform), and gradually Packet Transport Network (PTN, the Packet Transport of evolution up to now
Network), exactly network flow dataization development result.It searches to the bottom, circuit-switched network is only capable of providing the pipeline of rigidity
It is exchanged with coarseness, can not effectively meet the dynamic and sudden demand of data service, and the flexible pipe of packet switching network
Road and statistic multiplexing characteristic, are naturally to be adapted to data service.However, current packet switch is substantially based at electric layer
Reason, at high cost, energy consumption is high, with the rapid growth of flow, handles bottleneck and increasingly highlights, it is difficult to adapt to future network height
Speed, flexible, low cost and low energy consumption needs.Optical-fiber network has low cost, the advantage of low energy consumption and high-speed high capacity, but tradition
Optical circuit exchange network (such as wavelength-division multiplex (WDM, Wavelength Division Multiplexing) and optical transfer network
(OTN, Optical Transport Network) is only capable of providing the rigid conduit of big granularity, lacks the flexible of electric packet switch
Property, it cannot effective bearing data service.
In access net, gigabit passive optical network (GPON, Gigabit-Capable Passive Optical
Network) technology combines the advantage of photosphere and electric layer to a certain extent.In down direction, by the way of photosphere broadcast,
Optical line terminal (OLT, Optical Line Terminal) downlink signal sent is distributed to each light net by optical splitter
Network unit (ONU, Optical Network Unit), meanwhile, the bandwidth map of uplink frame is carried, in descending frame head with instruction
The sending time and length of each ONU upstream data；In up direction, each ONU indicates to send data according to bandwidth map, by light
Coupler is multiplexed to a wavelength channel and is uploaded to OLT.In this way, on the one hand GPON has photosphere high-speed high capacity and low cost
The characteristics of, on the other hand, the photosphere statistic multiplexing of multichannel data is realized in the upstream direction, improve flexibility and bandwidth benefit
With rate.GPON generally uses star/tree-like group of net topology, and working principle is suitble to carry multiple spot to the convergent type flow of single-point
(north and south flow is occupied an leading position), therefore succeed in access net application and large scale deployment.
However, non-aggregate type application scenarios are directed to, such as Metro core network and data central interior exchange network, East and West direction stream
It is very big to measure accounting, or even occupy leading position, GPON technology it is clearly unsuitable (East and West direction flow needs OLT electric layer to forward,
And GPON capacity is limited).Light burst mode transmission net (OBTN, Optical Burst Transport Network) is using based on light
Happen suddenly the all-optical switching technique of (OB, Optical Burst), has photosphere bandwidth between network arbitrary node pair and provides on demand and fastly
Fast dispatching is, it can be achieved that dynamically adapting to various flows (such as north-south burst flow, East and West direction burst flow) scene
And good support, it is able to ascend the level of resources utilization and network flexibility, while retaining photosphere high-speed high capacity and low cost
Advantage, and it is suitable for star/tree-like/various network topologies of annular.Fig. 1 is 4 node OBTN unidirectional ring network schematic diagrames, each
Node configures a pair of of fast tunable sudden transmitter and fast tunable burst receiver (being extended to multiple), and whole net has two
A wavelength is as data channel, and for a wavelength as control channel, node A is host node.OBTN technical characteristic is summarized as follows:
(1) transmission unit most basic in data channel is OB.There is guard time as interval, several OB compositions one between OB
A data frame, the corresponding OB frame in different wave length channel and OB time slot initial position need to be aligned.Data channel is connect using burst light
Receipts machine/transmitter, bursty data are that photosphere direct transfers between sourcesink node pair, do not need intermediate node and make electric layer forwarding.Source needs
Client-side data packet is converged and is encapsulated to OB and is sent.
(2) control channel is mutually separated with data channel.OBTN is using independent wavelength channel carrying control information, wherein wrapping
Include operation and maintenance management (OAM, Operations Administration and Maintenance) information, for collecting respectively
The Bandwidth Report and each node of instruction of node bandwidth request send/receive the bandwidth map of data, and control frame is prior to corresponding
Data frame is sent.Control channel can be carried out using common photoreceiver/transmitter as transceiver in each node
Electrical domain processing, to receive and update corresponding control information.
(3) All-optical switching based on OB is realized using fast tunable optical device.OBTN node can quickly adjust (ns
(nanosecond) grade) emittor/receiver transmitting/reception wavelength, with according to bandwidth map select corresponding wavelength and OB time slot into
Row bursty data transmission/reception, to realize the All-optical switching based on OB.
(4) the Real-Time Optical layer resource scheduling of traffic aware.OBTN uses centralized control mode, respectively passes through control from node
Frame periodically reports bandwidth request to host node, and host node carries out wavelength and OB according to current resource status and Bandwidth Allocation Policy
Time slot allocation, and allocation result is charged into bandwidth map, then be distributed to respectively from node, to realize according to flow demand by control frame
Photosphere resource fast dispatch.
The fast dispatch of photosphere resource in OBTN network causes optical power in data channel that paroxysmal fluctuation occurs, and
And fluctuation range is big.The optical amplifier apparatus that current OBTN network is adapted to using burst carries out the multiplex optical power in route
Amplification, but the burst optical amplifier apparatus of a wide range of optical power fluctuation is at high cost, technical difficulty is high, is not easy to realize.
Summary of the invention
To solve the above-mentioned problems, the invention proposes a kind of method and host node for controlling optical power, can reduce
The fluctuation range of the optical power of OBTN network.
In order to achieve the above object, the invention proposes a kind of method for controlling optical power, it is applied to light burst transfer net
OBTN, comprising:
The host node of OBTN updates bandwidth map, obtains each node in (N+1) time according to updated bandwidth map
The burst optical signal number exported in section；N is the integer more than or equal to 1；
Host node is according to output in the burst optical signal number and N period exported in each node (N+1) period
Optical signal number determine the variation ratio of optical power that each node is output on route；
Host node is according to (N+1) non-burst optical signal number in the period of variation each node of ratio-dependent of each node
Mesh；
Host node controls each node according to (N+1) of determining each node non-burst optical signal number in the period
(N+1) the non-burst optical signal of corresponding number is transmitted in the period.
Preferably, the burst optical signal number that the node exports within (N+1) period is (N+1)
The node is for the burst light number of data transmission and the burst light number of the straight-through data for forwarding other nodes in period
The sum of.
Preferably, before this method further include:
Host node determines the non-burst optical signal number exported in each node first time period.
Preferably, the non-burst optical signal number exported in each node first time period meets formula
Wherein, A1For maximum output burst required in any one node first time period in light burst mode transmission net OBTN
Optical signal number, X1For non-burst optical signal number required in any one described node first time period, P1Arbitrarily to happen suddenly
Optical signal is input to the minimum optical power of the wave multiplexer of the node, P2The node is input to for any non-burst optical signal
The minimum optical power of wave multiplexer, the ratio between the maximum luminous power and minimum optical power of any channel of C, B are the node
The input transient response multiple of Output optical power amplifier.
Preferably, the host node according to each node variation each node of ratio-dependent non-burst optical signal number packet
It includes:
The non-burst optical signal number for each node determined meets formula
Wherein, A2For output burst optical signal number required in any one node N period, P1Arbitrarily to happen suddenly
Optical signal is input to the minimum optical power of the wave multiplexer of the node, X2It is non-burst to be exported in the node N period
Optical signal number, P2The minimum optical power of the wave multiplexer of the node, A are input to for any non-burst optical signal3It is described
The burst optical signal number of output (N+1) required in the period of node, X3It is defeated in the period for the node (N+1)
Non-burst optical signal number out, B are the input transient response multiple of the Output optical power amplifier of the node, and C arbitrarily believes
Ratio between the maximum luminous power and minimum optical power in road.
Preferably, the host node is according to (N+1) of determining each node non-burst optical signal number, control in the period
Making the interior non-burst optical signal for transmitting corresponding number of each node (N+1) period includes:
The host node generates control frame according to (N+1) of each node non-burst optical signal number in the period
Information is controlled each node (N+1) and is opened or closed in the period pair by the control frame for carrying control frame information of output
Answer the preconfigured non-burst optical signal transmission unit of number.
The invention also provides a kind of methods for amplifying burst optical signal, comprising:
One or more non-burst optical signals of continuous transmission on the route of light burst transfer net OBTN.
Preferably, the maximum output burst optical signal number of any one node of the OBTN, non-burst optical signal
The input transient response multiple of number and Output optical power amplifier meets formula
Wherein, A1For maximum output burst optical signal number needed for any node in light burst mode transmission net OBTN network, X1
For non-burst optical signal number, P needed for the node1The wave multiplexer of the node is input to most for the burst optical signal
Small optical power, P2The minimum optical power of the wave multiplexer of the node is input to for the non-burst optical signal, C is in the node
Wave multiplexer input terminal any one optical signal optical power maximum value and minimum value between ratio, B is the node
The input transient response multiple of Output optical power amplifier.
The invention also provides a kind of host nodes, include at least:
Update module, for updating bandwidth map；
Module is obtained, for obtaining each node in the prominent of (N+1) period interior output according to updated bandwidth map
Luminous signal number；N is the integer more than or equal to 1；
Determining module, for according to the burst optical signal number and N period exported in each node (N+1) period
The optical power that the optical signal number of interior output and each optical signal enter line transmission determines that each node is output on route
The variation ratio of optical power；According to (N+1) non-burst optical signal in the period of variation each node of ratio-dependent of each node
Number；
Control module, for according to (N+1) of determining each node non-burst optical signal number in the period, control to be each
The non-burst optical signal of transmission corresponding number in node (N+1) period.
Preferably, the determining module is also used to:
Determine the non-burst optical signal number exported in each node first time period.
Preferably, the determining module is specifically used for:
According to the light letter exported in the burst optical signal number and N period exported in each node (N+1) period
Number mesh determines the variation ratio of each node；
According to formulaDetermine the non-burst light exported in each node (N+1) period
Signal number；
Wherein, A2For output burst optical signal number required in any one node N period, P1Arbitrarily to happen suddenly
Optical signal is input to the minimum optical power of the wave multiplexer of the node, X2It is non-burst to be exported in the node N period
Optical signal number, P2The minimum optical power of the wave multiplexer of the node, A are input to for any non-burst optical signal3It is described
The burst optical signal number of output (N+1) required in the period of node, X3It is defeated in the period for the node (N+1)
Non-burst optical signal number out, B are the input transient response multiple of the Output optical power amplifier of the node, and C arbitrarily believes
Ratio between the maximum luminous power and minimum optical power in road.
Preferably, the control module is specifically used for:
According to (N+1) of determining each node non-burst optical signal number in the period, control frame information is generated, is passed through
The control frame for carrying control frame information of output, controls each node (N+1) and opens or closes corresponding number in the period
Preconfigured non-burst optical signal transmission unit.
The invention also provides a kind of nodes, include at least: non-burst optical signal transmission unit and/or non-burst optical signal
Receiving unit；
Wherein, non-burst optical signal transmission unit, for non-burst light letter to be sent or do not sent under the control of host node
Number；
Non-burst optical signal receiving unit, for receiving corresponding non-burst optical signal.
Compared with prior art, the host node that the present invention includes: OBTN updates bandwidth map, broadly according to updated band
Figure obtains the burst optical signal number that each node exports within (N+1) period；N is the integer more than or equal to 1；Host node
According to the optical signal number exported in the burst optical signal number and N period exported in each node (N+1) period, with
And each optical signal enters the optical power of line transmission and determines the variation ratio of optical power that each node is output on route；Main section
Point is according to (N+1) non-burst optical signal number in the period of variation each node of ratio-dependent of each node；Host node according to
(N+1) of each node non-burst optical signal number in the period controls and transmits corresponding number in each node (N+1) period
Non-burst optical signal.Scheme through the invention, host node control each node according to the burst optical signal number of each node and pass
Defeated corresponding non-burst optical signal, in a certain range by the Output optical power variation ratio control of each node, that is, reduce
The fluctuation range of the optical power of OBTN network.
Alternatively, the present invention includes: one or more non-burst optical signals of continuous transmission on the route of OBTN.Pass through
The solution of the present invention, the non-burst optical signal of continuous transmission between each node, to reduce the wave of the optical power of OBTN network
Dynamic range.
Detailed description of the invention
The attached drawing in the embodiment of the present invention is illustrated below, the attached drawing in embodiment be for of the invention into one
Step understands, is used to explain the present invention, does not constitute a limitation on the scope of protection of the present invention together with specification.
Fig. 1 is 4 node OBTN unidirectional ring network schematic diagrames；
Fig. 2 is a kind of method flow diagram of control optical power of the invention；
Fig. 3 is the method flow diagram of another control optical power of the invention；
Fig. 4 is the structure composition schematic diagram of host node of the invention；
Fig. 5 is the structure composition schematic diagram of host node or the specific embodiment from node of the invention；
Fig. 6 is the structure composition schematic diagram of the specific embodiment of another host node of the invention；
Fig. 7 is the structure composition schematic diagram of another specific embodiment from node of the invention.
Specific embodiment
For the ease of the understanding of those skilled in the art, the invention will be further described with reference to the accompanying drawing, not
It can be used to limit the scope of the invention.It should be noted that in the absence of conflict, embodiment and reality in the application
The various modes applied in example can be combined with each other.
Referring to fig. 2, the invention proposes a kind of method for controlling optical power, it is applied to OBTN, this method comprises:
Step 200, OBTN host node determine the non-burst optical signal number exported in each node first time period.
In this step, the non-burst optical signal number exported in each node first time period meets formula (1).
Wherein, A1For maximum output burst required in any one node first time period in light burst mode transmission net OBTN
Optical signal number, X1For non-burst optical signal number required in any one node first time period, P1For the light letter that arbitrarily happens suddenly
Number it is input to the minimum optical power of the wave multiplexer of the node, P2The wave multiplexer of node is input to for any non-burst optical signal
Minimum optical power, C are between the maximum value and minimum value of the optical power of the wave multiplexer input terminal of node any one optical signal
Ratio, B be the node Output optical power amplifier input transient response multiple.
Wherein, stablize transmission for wavelength channels wavelength-division multiplex each in OBTN network, under normal circumstances, happen suddenly light
The dynamic range for the optical power that signal is input to the optical power of wave multiplexer and non-burst optical signal is input to wave multiplexer is consistent.
Wherein, the input transient response multiple of the Output optical power amplifier of this node refers to that being input to Output optical power puts
The burst response variation multiple of the optical power of big device
The sum of input optical power amplifier and the maximum amplification of Output optical power amplifier can be a node
The optical power insertion loss of wave multiplexer, the optical power insertion loss of a upper node to the optical fiber between this node, this node point
The optical power insertion loss of wave device, the optical power insertion loss of the array of photoswitch of this node and each fibre-optical splice optical power are inserted
Enter the corresponding optical power attenuation multiple of the sum of loss.
For example, in Fig. 1, it is known that the optical power insertion loss of the wave multiplexer of node D is 6dB, light between node D to node A
Fiber optical power insertion loss is 10dB, and the optical power insertion loss of the first channel-splitting filter of node A is 6dB, the second partial wave of node A
The optical power insertion loss of device is 6dB, and the optical power insertion loss of the optical burst swit- ching unit of node A is 3dB, is used for equipment room
The optical power insertion loss of each fibre-optical splice of connection adds up to 3dB.
It can thus be appreciated that the optical signal input damage of the wave multiplexer from the optical signal input of the wave multiplexer of node D to node A
Consumption adds up to (6+10+6+6+3+3=34dB).Can using the input optical power amplifier of configuration node A as fixed gain+17dB,
The Output optical power amplifier of node D can be set to adopt for the optical power amplifier of fixed gain+17dB, node A and node D
With using (EDFA, Erbium-doped Optical Fiber Amplifier) erbium-doped fiber amplifier.Choose the defeated of node D
The Output optical power amplifier responding range of light power amplifier is that (dB is the transient response of optical power amplifier to 10dB
Multiple, 10dB are 10 times).Then the starting point of node D be configured to 0 to the optical power loss between the end point in node A (-
34dB+17dB+17dB).Namely if the burst optical signal of node D starting point optical power value be X, in the light of A node
Burst-switched unit is straight-through, and the optical power value for reaching the end point of node A is still X.
For example, in Fig. 1, in the OBTN network of unidirectional loop, host node A be output to from node B, from node B be output to from
Node C, from node C is output to from node D, to be output to from node D from the maximum value of the burst optical signal number of node A be all 16
A wavelength channel, then A1=16, the difference between the maximum luminous power and minimum optical power of any channel is 3dB, then C=2,
And it configures each node and meets P1=P2, the responding range of the Output optical power amplifier of four nodes is 10dB, then
B=10.Each parameter of node A, B, C, D are substituted into formula (1) respectively, obtaining result is X1>=4.Thus, can be pre-
At least X is first configured in each node1The transmission unit of the non-burst optical signal of=4 wavelength channels and corresponding non-burst light letter
Number receiving unit.It namely only needs to make host node A to be output to from node B, from node B be output to from node C, be defeated from node C
It arrives and is output to from node D, from node D from node A out, meet formula (1).The transmission of non-burst optical signal is pre-configured in this example
Unit and corresponding non-burst optical signal receiving unit specifically: node A is sent, the received 2 non-burst wavelength signals of node A
λ 1, λ 2, λ 1, λ 2 in node B, C, D be it is straight-through, i.e., be configured to send the transmission of non-burst wavelength signals λ 1, λ 2 in node A
Unit and receiving unit for receiving non-burst wavelength signals λ 1, λ 2；Node A is sent, 2 non-burst waves of Node-B receiver
Long signal λ 3, λ 4；Node B is sent, node C received 2 non-burst wavelength signals λ 3, λ 4；Node C is sent, and node D is received
2 non-burst wavelength signals λ 3, λ 4；Node D is sent, node A received 2 non-burst wavelength signals λ 3, λ 4.
The transmission unit and corresponding non-burst optical signal receiving unit that non-burst optical signal can also be pre-configured with are section
Point A sending node B is received, and node B sending node C is received, and node C sending node D, node D sending node A reception, each section
Configure 4 non-burst wavelength signals λ 1, λ 2, λ 3, λ 4.
It can also be using other configuration methods, as long as meeting X1All configuration methods of >=4 are in protection of the invention
In range.
Step 201, host node update bandwidth map, obtain each node at (N+1) according to updated bandwidth map
Between the burst optical signal number that exports in section.
In this step, N is the integer more than or equal to 1.
In this step, the burst optical signal number that node exports within (N+1) period is (N+1) period internal segment
Burst light number and the straight-through burst light number of data the sum of that forwards other nodes of the point for data transmission.
For example, the control channel transmitting-receiving of host node A and processing unit receive control frame in Fig. 1, will be obtained from control frame
Slave node B, from node C, the host node A generated from the customer side Service Processing Unit of the bandwidth request of node D and host node
Bandwidth demand be transferred to bandwidth map allocation unit, bandwidth map allocation unit carries out bandwidth allocation calculating, generates new band
Broadly scheme.
After host node A generates new bandwidth map, it is assumed that bandwidth map information is (N+1) in the period, needs node A
The burst optical signal number of output is 0 wavelength, and the burst optical signal number of node B output is 8 wavelength, node C output
Burst optical signal number is 1 wavelength, and the burst optical signal number of node D output is 16 wavelength, wherein has higher priority
The business of node D to node A need to transmit, need 2 wavelength transmissions.
Step 202, host node are according to the burst optical signal number and N time exported in each node (N+1) period
The optical power that the optical signal number and each optical signal exported in section enters line transmission determines that each node is output on route
Optical power variation ratio.
In this step, the variation ratio of node is the optical signal number exported in the N period and (N+1) in the period
The ratio of the burst optical signal number of output.
Wherein, the optical signal number exported in the N period is the burst optical signal number exported in the N period and non-
Sum between burst optical signal number.
Assuming that in this example, as shown in Figure 1, the burst optical signal number of node A output is 16 waves within the N period
Long, non-burst optical signal λ 1, λ 2 have already turned on；The burst optical signal number of node B output is 16 wavelength, is not turned on non-prominent
Luminous signal λ 3, λ 4；The burst optical signal number of node C output is 16 wavelength, is not turned on non-burst optical signal λ 3, λ 4；
The burst optical signal number of node D output is 16 wavelength, non-burst optical signal λ 3, λ 4 is not turned on, then node A, node
B, node C, the optical signal number exported in the node D N period are 18.
Step 203, host node are according to (N+1) non-burst light in the period of variation each node of ratio-dependent of each node
Signal number.
In this step, the non-burst optical signal number of node meets formula (2).
Wherein, A2For output burst optical signal number required in the node N period, P1For burst optical signal input
To the minimum optical power of the wave multiplexer of the node, X2For the non-burst optical signal number exported in the node N period, P2For
Non-burst optical signal is input to the minimum optical power of the node wave multiplexer, A3It is required in the period for (N+1) of the node
The burst optical signal number of output, X3For the non-burst optical signal number exported in node (N+1) period, B is the section
Point Output optical power amplifier input transient response multiple, C be any channel maximum luminous power and minimum optical power it
Between ratio.
Specifically, C can be the maximum value in the optical power of the wave multiplexer input terminal of arbitrary node any one optical signal
Ratio between minimum value.For example, the reference optical power of any one optical channel in the wave multiplexer input terminal of arbitrary node
For (- 8dBm)~(- 11dBm), then difference is 3dB between the maximum value and minimum value of optical power, then C=2.
In this example, host node is as follows according to formula (2) calculated result, it is clear that A2、A3、X2、X3It is whole more than or equal to 0
Number.
In node A, A2=16, A3=0, X2=2, P1=P2,B=10, then X3>=3.6 can take X3=4；
In node B, A2=16, A3=8, X2=2, P1=P2,B=10, then X3>=0 can take X3=0；
In node C, A2=16, A3=1, X2=2, P1=P2, B=10, then X3>=2.6 can take X3=3；
In node D, A2=16, A3=16, X2=2, P1=P2,B=10, then X3>=0 can take X3=0.
Step 204, host node control each node according to (N+1) of each node non-burst optical signal number in the period
The non-burst optical signal of transmission corresponding number in (N+1) period.
In this example, according to step 203 as a result, host node obtains proceeding as follows in (N+1) period domestic demand:
Host node A stays open that non-burst wavelength signals λ 1, λ 2 are constant, increases the non-burst wavelength signals for opening this node newly
λ3,λ4；
Node-B receiver host node controls information, is failure to actuate；
Node C receives host node and controls information, increases the non-burst wavelength signals λ 3 or λ 4 for opening this node newly；
Node D receives host node and controls information, because thering is the business of node D to the node A of higher priority to need to transmit,
Need 2 wavelength transmissions.Non-burst wavelength signals λ 3 and λ 4 the transmitting high-priority service for opening this node can be increased newly.
In this step, host node according to (N+1) of each node in the period non-burst optical signal number open or close
Preconfigured non-burst optical signal transmission unit.
In this step, non-burst optical signal transmission unit and corresponding non-can be configured in one or more nodes in advance
Burst optical signal receiving unit.For example, being pre-configured with non-burst optical signal transmission unit in node A and non-burst optical signal connects
Receive unit.If node A was calculated at (N+1) in the period, need to transmit a non-burst optical signal in the nodeb,
It needs to transmit two non-burst optical signals in node C and node D, then node A opens non-burst light within (N+1) period
Signal transmitting unit, makes it send two non-burst optical signals, then the two non-burst optical signals opened pass through node B, node C
Node A is finally transferred to node D to be received by the non-burst optical signal receiving unit of node A.
In this step, the wavelength of non-burst optical signal can be the non-burst light letter that (N+1) is not used in the period
Number any wavelength.
In this step, non-burst optical signal can be asemantic optical signal, be also possible to transmit the light letter of any information
Number.
In this step, non-burst optical signal can also be used as fixed letter with the higher business datum of transmission priority
Cease channel.
In this step, host node can control each node by the way of transmission control frame and open or close non-burst light letter
Number.Specifically, host node passes through carrying for output according to (N+1) of each node non-burst optical signal number in the period
The control frame for controlling frame information, controls each node (N+1) and opens or closes the preconfigured non-of corresponding number in the period
Burst optical signal transmission unit.Wherein, control frame information may include node identification, indicate that the one or more of node is non-burst
The mark that optical signal transmission unit opens or closes.Wherein, node identification can be nodename, indicate one or more of node
The mark that a non-burst optical signal transmission unit opens or closes may include two parts, a part instruction be need to open or
It closes, another part is the mark of non-burst optical signal transmission unit.
In this way, searching itself corresponding instruction in the corresponding relationship of control frame after each node receives control frame and opening
Or the mark closed, to carry out the opening and closing of non-burst optical signal.
In method of the invention, each node opens or closes under the control of host node at (N+1) non-prominent in the period
Luminous signal, and the bandwidth request of (N+2) in the period is sent to next node.
Referring to Fig. 3, the invention also provides a kind of methods for controlling optical power, comprising:
Step 300, one or more non-burst optical signals of continuous transmission on the route of OBTN.
In this method, non-burst optical signal transmission unit and corresponding non-can be configured in one or more nodes in advance
Burst optical signal receiving unit.
Before this method further include:
Step 301, according to the maximum number of burst optical signal and the input transient response multiple of Output optical power amplifier
Determine the number of non-burst optical signal.
In method of the invention, preconfigured non-burst optical signal hair can be determined according to the number of non-burst optical signal
Send the number of unit and corresponding non-burst optical signal receiving unit.
Specifically, the maximum number of burst optical signal, the number of non-burst optical signal and Output optical power amplifier it is defeated
Enter transient response multiple and meets formula (1).
With reference to upper example, in the OBTN network of the unidirectional loop of same configuration, host node A is output to from node B, from node B
It is output to from node C, is output to from node C from node D, from node D and is output to the maximum from the burst optical signal number of node A
Value is all 16 wavelength channels, then A1=16, the difference between the maximum luminous power and minimum optical power of any channel is
3dB, then C=2, and configure each node P1=P2, the Output optical power amplifier of the Output optical power amplifier of four nodes
Responding range is 10dB then B=10.Each parameter of node A, B, C, D are substituted into formula (1) respectively, obtaining result is
X1>=4.Thus, at least X can be configured in each node in advance1The transmission of the non-burst optical signal of=4 wavelength channels
Unit and corresponding non-burst optical signal receiving unit.It namely only needs to make host node A to be output to from node B, is defeated from node B
It arrived out from node C, be output to from node C from node D, from node D and be output to from node A, meet formula (1).It is pre-configured with non-
The transmission unit of burst optical signal and corresponding non-burst optical signal receiving unit continuous transmission save for example, being sent by node A
Point A received 4 lasting non-burst wavelength signals λ 1, λ 2, λ 3, λ 4 are straight-through when by node B, C, D.
It can also be using other configuration methods, as long as meeting X1All configuration methods of >=4 are in protection of the invention
In range.
Wherein, non-burst optical signal can be asemantic optical signal, be also possible to transmit the optical signal of any information.
Wherein, non-burst optical signal it is logical can to can also be used as fixed information with the higher business datum of transmission priority
Road.
Referring to fig. 4, it the invention also provides a kind of host node, includes at least:
Update module, for updating bandwidth map；
Module is obtained, for obtaining each node in the prominent of (N+1) period interior output according to updated bandwidth map
Luminous signal number；N is the integer more than or equal to 1；
Determining module, for according to the burst optical signal number and N period exported in each node (N+1) period
The optical power that the optical signal number of interior output and each optical signal enter line transmission determines that each node is output on route
The variation ratio of optical power；According to (N+1) non-burst optical signal in the period of variation each node of ratio-dependent of each node
Number；
Control module, for according to (N+1) of determining each node non-burst optical signal number, generation control in the period
Frame information processed exports control frame, controls the non-burst optical signal of transmission corresponding number in each node (N+1) period.
In host node of the invention, determining module is also used to:
It determines to the non-burst optical signal number exported in node first time period.
In host node of the invention, determining module is specifically used for:
According to the light letter exported in the burst optical signal number and N period exported in each node (N+1) period
Number mesh determines the variation ratio of each node；
According to formulaDetermine the non-burst optical signal number of each node；
Wherein, A2For output burst optical signal number required in any one node N period, P1Arbitrarily to happen suddenly
Optical signal is input to the minimum optical power of the wave multiplexer of the node, X2For the non-burst light letter exported in the node N period
Number mesh, P2The minimum optical power of the node wave multiplexer, A are input to for non-burst optical signal3For (N+1) time of the node
The burst optical signal number of required output, X in section3For the non-burst optical signal number exported in node (N+1) period
Mesh, B are the input transient response multiple of the Output optical power amplifier of the node, and C is the wave multiplexer input terminal times in the node
Anticipate an optical signal optical power maximum value and minimum value between ratio
In host node of the invention, control module is specifically used for:
According to (N+1) of determining each node non-burst optical signal number in the period, control frame information is generated, is passed through
The control frame for carrying control frame information of output, controls each node (N+1) and opens or closes corresponding number in the period
Preconfigured non-burst optical signal transmission unit.
The invention also provides a kind of nodes, include at least: non-burst optical signal transmission unit and/or non-burst optical signal
Receiving unit；
Wherein, non-burst optical signal transmission unit, for non-burst light letter to be sent or do not sent under the control of host node
Number；
Non-burst optical signal receiving unit, for receiving corresponding non-burst optical signal.
Wherein, non-burst optical signal transmission unit can be configured to send the non-burst optical signal of fixed wave length, non-burst
Optical signal receiving unit can be configured to receive the non-burst optical signal of any wavelength.
Fig. 5 is that host node or the structure composition schematic diagram from node are included at least referring to Fig. 5:
Input optical power amplifier 5061, for carrying out power amplification to the multiplex optical signal from a upper node；
First channel-splitting filter 500, for separating control channel wavelength and data channel wave in amplified multiplex optical signal
It is long, control channel wavelength is sent to control channel transmitting-receiving and processing unit 504, data channel wavelength is sent to the second partial wave
Device 501；
Second channel-splitting filter 501, in mask data channel burst optical signal and non-burst optical signal, will burst light letter
Number it is sent to 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, Wavelength Selective Switch) or
Wavelength permutation grating (AWG, Arrayed Waveguide Grating).
Control channel transmitting-receiving and processing unit 504, for receiving and parsing the control frame information of control channel, control light is prominent
The optical burst swit- ching of crosspoint 502 is sent out, the bandwidth demand of customer side Service Processing Unit 505 is received, generates new control frame,
Control frame is sent to wave multiplexer 503；
Optical burst swit- ching unit 502, for the second channel-splitting filter 501 to be exported burst optical signal and customer side business processing list
The burst optical signal of member 505 carries out optical burst swit- ching.It receives control channel transmitting-receiving and the order of processing unit 504 is acted.
The received burst optical signal of this node, by the lower road of optical burst swit- ching unit 502 to customer side Service Processing Unit 505；This node
The burst optical signal of transmission by road on customer side Service Processing Unit 505 to optical burst swit- ching unit 502, then is happened suddenly by light and is handed over
The output of unit 502 is changed to wave multiplexer 503；The burst optical signal that this node is not handled is issued by optical burst swit- ching unit 502 is straight-through
Wave multiplexer 503.Optical burst swit- ching unit 502 can be realized using fast optical switch array.
Customer side Service Processing Unit 505 carries out light burst transmission and light burst reception to burst optical signal, also to receive
Client-side data carries out data storage, and bandwidth demand is sent to control channel transmitting-receiving and processing by the bandwidth demand for generating this node
Unit 504
Wave multiplexer 503 is used for control channel wavelength, and burst optical signal, non-burst optical signal carry out wavelength-division multiplex multiplex,
Multiplex is sent to Output optical power amplifier 5062 again；
Output optical power amplifier 5062 is sent to next node after carrying out power amplification to multiplex.
Fig. 6 is that the structure composition schematic diagram of another host node is included at least referring to Fig. 6:
Input optical power amplifier 6061, for carrying out power amplification to the multiplex optical signal from a upper node；
Third channel-splitting filter 600 sends out control channel for separating control channel and data channel in amplified multiplex
Control channel transmitting-receiving and processing unit 604 are given, data channel is sent to the 4th channel-splitting filter 601；
4th channel-splitting filter 601, in mask data channel burst optical signal and non-burst optical signal, will burst light letter
Number it is sent to optical burst swit- ching unit 602, non-burst optical signal is sent to wave multiplexer 603, or be sent to non-burst optical signal
Receiving unit 6053；
Optical burst swit- ching unit 602, burst optical signal and customer side control unit for exporting the 4th channel-splitting filter 601
605 burst optical signal carries out optical burst swit- ching.It receives control channel transmitting-receiving and the order of processing unit 604 is acted.?
The received burst optical signal of this node, by the lower road of optical burst swit- ching unit 602 to the burst optical signal of customer side control unit 605
Receiving unit 6051；The burst optical signal that this node is sent, by the burst optical signal transmission unit of customer side control unit 605
Road is exported to optical burst swit- ching unit 602, then by optical burst swit- ching unit 602 to wave multiplexer 603 on 6052；This node is not handled
Burst optical signal, issue wave multiplexer 603 by optical burst swit- ching unit 602 is straight-through.Optical burst swit- ching unit 602 can be using fast
Fast array of photoswitch is realized.
Customer side control unit 605 includes burst optical signal receiving unit 6051 and burst optical signal transmission unit 6052,
Non-burst optical signal receiving unit 6053 and non-burst optical signal transmission unit 6054, client-side data processing unit 6055；
Wherein, burst optical signal receiving unit 6051 carries out photoelectric conversion to burst optical signal, and burst optical signal sends single
6052 pairs of burst optical signals of member carry out electro-optic conversion.
Wherein, client-side data processing unit 6055 receives client-side data and carries out data storage, is then forwarded to burst light
Signal transmitting unit 6052, the data that client-side data processing unit 6055 receives burst optical signal receiving unit 6051 are counted
According to storage, it is then forwarded to customer side.Client-side data processing unit 6055 generates the bandwidth demand of this node, and bandwidth demand is sent out
Give control channel transmitting-receiving and processing unit 604.
Wherein, non-burst optical signal receiving unit 6053 and non-burst optical signal transmission unit 6054 are preconfigured,
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 nothing
The optical signal of information is also possible to carry the optical signal of any information or the higher business datum of transmission priority.Customer side
Data processing unit 6055 receives client-side data and carries out data storage, can be sent to non-burst optical signal transmission unit 6054
It is transmitted, the data that client-side data processing unit 6055 also can receive non-burst optical signal receiving unit 6053 are counted
According to storage, it is then forwarded to customer side.
Control channel transmitting-receiving and processing unit 604, for receiving and parsing the control frame information of control channel, by it is each from
Bandwidth request in node subsequent time period is sent to bandwidth map allocation unit 607, by this node customer side control unit 605
Bandwidth demand in subsequent time period is also sent to bandwidth map allocation unit 607；It is obtained according to updated bandwidth map each
The burst optical signal and corresponding number that node exports in subsequent time period；It is exported in subsequent time period according to each node
Burst optical signal number determines the non-burst optical signal number of each node, by subsequent time period respectively from the burst optical signal of node
Information and the non-burst optical signal information of number of the slave node determined are converted into control frame information, issue control channel wavelength and give
Wave multiplexer 603.Control channel transmitting-receiving and processing unit 604 are simultaneously in subsequent time period to this node customer side control unit 605
It is controlled with optical burst swit- ching unit 602, one or more non-burst optical signal of this node can be turned on or off
Transmission unit 6054.
Bandwidth map allocation unit 607, for updating bandwidth map according to the bandwidth request of each node, by updated band
Broadly figure is sent to control channel transmitting-receiving and processing unit 604；
Wave multiplexer 603, for will be from the burst optical signal of optical burst swit- ching unit 602, from the 4th channel-splitting filter 601
Non-burst optical signal, non-burst optical signal from non-burst optical signal transmission unit 6054 are received and dispatched and are located from control channel
The control channel for managing unit 604 carries out multiplex, and multiplex optical signal is sent to Output optical power amplifier 6062；
Output optical power amplifier 6062, for being sent to next node after carrying out optical power amplification to multiplex.
Fig. 7 is that another kind is included at least from the structure composition schematic diagram of node referring to Fig. 7:
Input optical power amplifier 7061, for carrying out power amplification to the multiplex optical signal from a upper node；
5th channel-splitting filter 700 will be controlled for separating control channel and data channel in amplified multiplex optical signal
Channel is sent to control channel transmitting-receiving and processing unit 704, and data channel is sent to the 6th channel-splitting filter 701；
6th channel-splitting filter 701, in mask data channel burst optical signal and non-burst optical signal, will burst light letter
Number it is sent to optical burst swit- ching unit 702, non-burst optical signal is sent to wave multiplexer 703, or be sent to non-burst optical signal
Receiving unit 7053；
Optical burst swit- ching unit 702, for burst optical signal to be sent to burst optical signal receiving unit 706, or transmission
To wave multiplexer 703；Burst optical signal from burst optical signal transmission unit 707 is sent to wave multiplexer 703；
Optical burst swit- ching unit 702, burst optical signal and customer side business processing for exporting the 4th channel-splitting filter 701
The burst optical signal of unit 705 carries out optical burst swit- ching.It receives control channel transmitting-receiving and the order of processing unit 704 is moved
Make.In the received burst optical signal of this node, by the lower road of optical burst swit- ching unit 702 to customer side Service Processing Unit 705
Burst optical signal receiving unit 7051；The burst optical signal that this node is sent, by the burst light of customer side Service Processing Unit 705
Road is exported to optical burst swit- ching unit 702, then by optical burst swit- ching unit 702 to wave multiplexer 703 on signal transmitting unit 7052；
The burst optical signal that this node is not handled issues wave multiplexer 703 by optical burst swit- ching unit 702 is straight-through.Optical burst swit- ching unit
702 can be realized using fast optical switch array.
Customer side control unit 705 includes burst optical signal receiving unit 7051 and burst optical signal transmission unit 7052,
Non-burst optical signal receiving unit 7053 and non-burst optical signal transmission unit 7054, client-side data processing unit 7055；
Wherein, burst optical signal receiving unit 7051 and burst optical signal transmission unit 7052 carry out light to burst optical signal
Electricity, electro-optic conversion.
Wherein, client-side data processing unit 7055 receives client-side data and carries out data storage, is then forwarded to burst light
Signal transmitting unit 7052, the data that client-side data processing unit 7055 receives burst optical signal receiving unit 7051 are counted
According to storage, it is then forwarded to customer side.Client-side data processing unit 7055 generates the bandwidth demand of this node, and bandwidth demand is sent out
Give control channel transmitting-receiving and processing unit 704.
Wherein, non-burst optical signal receiving unit 7053 and non-burst optical signal transmission unit 7054 are preconfigured,
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 nothing
The optical signal of information is also possible to carry the optical signal of any information or the higher business datum of transmission priority.Customer side
Data processing unit 7055 receives client-side data and carries out data storage, can be sent to non-burst optical signal transmission unit 7054
It is transmitted, the data that client-side data processing unit 7055 also can receive non-burst optical signal receiving unit 7053 are counted
According to storage, it is then forwarded to customer side.
Control channel transmitting-receiving and processing unit 704, for receiving and parsing the control frame information of control channel.Control channel
Transmitting-receiving and processing unit 704 obtain burst optical signal information of this node in subsequent time period, control optical burst swit- ching unit
702 are acted.Control channel transmitting-receiving and processing unit 704 obtain non-burst optical signal letter of this node in subsequent time period
Breath, turns on or off one or more non-burst optical signal transmission unit 7054 of this node.Control channel transmitting-receiving and place
Bandwidth demand in 705 subsequent time period of this node customer side control unit is also converted into control frame information by reason unit 704,
It issues control channel wavelength and gives wave multiplexer 703.
Wave multiplexer 703, for will be from the burst optical signal of optical burst swit- ching unit 702, from the 6th channel-splitting filter 701
Non-burst optical signal, non-burst optical signal from non-burst optical signal transmission unit 7054 are received and dispatched and are located from control channel
The control channel for managing unit 704 carries out multiplex, and multiplex optical signal is sent to Output optical power amplifier 7062；
Output optical power amplifier 7062, for being sent to next node after carrying out optical power amplification to multiplex.
It should be noted that embodiment described above be merely for convenience of it will be understood by those skilled in the art that, and
It is not used in and limits the scope of the invention, under the premise of not departing from inventive concept of the invention, those skilled in the art couple
Any obvious replacement and improvement that the present invention is made etc. are within the scope of the present invention.
Claims (10)
1. a kind of method for controlling optical power, which is characterized in that be applied to light burst transfer net OBTN, comprising:
The host node of OBTN updates bandwidth map, obtains each node at (N+1) in the period according to updated bandwidth map
The burst optical signal number of output；N is the integer more than or equal to 1；
Host node is according to the light exported in the burst optical signal number and N period exported in each node (N+1) period
The optical power that signal number and each optical signal enter line transmission determines the change for the optical power that each node is output on route
Change ratio；
Host node is according to (N+1) non-burst optical signal number in the period of variation each node of ratio-dependent of each node；
Host node controls each node (N+1) according to (N+1) of determining each node non-burst optical signal number in the period
The non-burst optical signal of transmission corresponding number in period.
2. the method according to claim 1, wherein what the node exported within (N+1) period
Burst optical signal number be (N+1) in the period node for the burst optical signal number of data transmission and straight-through
Forward the sum of the burst optical signal number of the data of other nodes.
3. the method according to claim 1, wherein before this method further include:
Host node determines the non-burst optical signal number exported in each the 1st period of node.
4. according to the method described in claim 3, it is characterized in that, the non-burst light exported in the 1st period of each node
Signal number meets formula
Wherein, A1For maximum output burst optical signal required in any one the 1st period of node in light burst mode transmission net OBTN
Number, X1For non-burst optical signal number required in any one described the 1st period of node, P1For any burst optical signal
It is input to the minimum optical power of the wave multiplexer of the node, P2The wave multiplexer of the node is input to for any non-burst optical signal
Minimum optical power, the ratio between the maximum luminous power and minimum optical power of any channel of C, B be the node output light
The input transient response multiple of power amplifier.
5. the method according to claim 1, wherein the host node is each according to the variation ratio-dependent of each node
The non-burst optical signal number of node includes:
The non-burst optical signal number for each node determined meets formula
Wherein, A2For output burst optical signal number required in any one node N period, P1For the light letter that arbitrarily happens suddenly
Number it is input to the minimum optical power of the wave multiplexer of the node, X2For the non-burst light letter exported in the node N period
Number mesh, P2The minimum optical power of the wave multiplexer of the node, A are input to for any non-burst optical signal3For the node
The output (N+1) required in the period burst optical signal number, X3For what is exported in node (N+1) period
Non-burst optical signal number, B are the input transient response multiple of the Output optical power amplifier of the node, any channel of C
Ratio between maximum luminous power and minimum optical power.
6. the method according to claim 1, wherein (N+1) of the host node according to determining each node
Non-burst optical signal number in period controls the non-burst optical signal of transmission corresponding number in each node (N+1) period
Include:
The host node generates control frame information according to (N+1) of each node non-burst optical signal number in the period,
By the control frame for carrying control frame information of output, controls each node (N+1) and open or close corresponding number in the period
The preconfigured non-burst optical signal transmission unit of purpose.
7. a kind of host node, which is characterized in that include at least:
Update module, for updating bandwidth map；
Module is obtained, for obtaining the burst light that each node exports within (N+1) period according to updated bandwidth map
Signal number；N is the integer more than or equal to 1；
Determining module, for defeated according to the burst optical signal number exported in each node (N+1) period and in the N period
The optical power that optical signal number and each optical signal out enters line transmission determines the light function that each node is output on route
The variation ratio of rate；According to (N+1) non-burst optical signal number in the period of variation each node of ratio-dependent of each node；
Control module, for controlling each node according to (N+1) of determining each node non-burst optical signal number in the period
The non-burst optical signal of transmission corresponding number in (N+1) period.
8. host node according to claim 7, which is characterized in that the determining module is also used to:
Determine the non-burst optical signal number exported in the 1st period of each node.
9. host node according to claim 7 or 8, which is characterized in that the determining module is specifically used for:
According to the optical signal number exported in the burst optical signal number and N period exported in each node (N+1) period
The optical power that mesh and each optical signal enter line transmission determines the variation ratio of each node；
According to formulaDetermine the non-burst optical signal exported in each node (N+1) period
Number；
Wherein, A2For output burst optical signal number required in any one node N period, P1For the light letter that arbitrarily happens suddenly
Number it is input to the minimum optical power of the wave multiplexer of the node, X2For the non-burst light letter exported in the node N period
Number mesh, P2The minimum optical power of the wave multiplexer of the node, A are input to for any non-burst optical signal3For the node
The output (N+1) required in the period burst optical signal number, X3For what is exported in node (N+1) period
Non-burst optical signal number, B are the input transient response multiple of the Output optical power amplifier of the node, any channel of C
Ratio between maximum luminous power and minimum optical power.
10. host node according to claim 7 or 8, which is characterized in that the control module is specifically used for:
According to (N+1) of determining each node non-burst optical signal number in the period, control frame information is generated, output is passed through
Carry control frame information control frame, control each node (N+1) and open or close the preparatory of corresponding number in the period
The non-burst optical signal transmission unit of configuration.
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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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