WO2016082613A1 - Procédé et système permettant de commander la puissance optique - Google Patents

Procédé et système permettant de commander la puissance optique Download PDF

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Publication number
WO2016082613A1
WO2016082613A1 PCT/CN2015/090453 CN2015090453W WO2016082613A1 WO 2016082613 A1 WO2016082613 A1 WO 2016082613A1 CN 2015090453 W CN2015090453 W CN 2015090453W WO 2016082613 A1 WO2016082613 A1 WO 2016082613A1
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node
burst
optical signals
burst optical
output
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PCT/CN2015/090453
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English (en)
Chinese (zh)
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陈勋
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中兴通讯股份有限公司
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Publication of WO2016082613A1 publication Critical patent/WO2016082613A1/fr

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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

Definitions

  • This application relates to, but is not limited to, optical network technology.
  • the flexible pipelines and statistical multiplexing characteristics of packet-switched networks are naturally adapted to data.
  • the current packet switching is basically based on electrical layer processing, which has high cost and high energy consumption. With the rapid growth of traffic, the processing bottleneck is increasingly prominent, and it is difficult to adapt to the needs of future high-speed, flexible, low-cost and low-energy consumption of the network. .
  • Optical networks have the advantages of low cost, low power consumption, and high speed and large capacity.
  • traditional optical circuit switching networks such as Wavelength Division Multiplexing (WDM) and Optical Transport Network (OTN) can only provide large granularity.
  • WDM Wavelength Division Multiplexing
  • OTN Optical Transport Network
  • the Gigabit-Capable Passive Optical Network (GPON) technology combines the advantages of the optical layer and the electrical layer to some extent.
  • the downlink signal transmitted by the optical line terminal OLT, Optical Line Terminal
  • OLT optical line terminal
  • ONUs optical network units
  • the downlink frame header carries a bandwidth map of the uplink frame to indicate the transmission time and length of each ONU uplink data.
  • each ONU sends data according to the bandwidth map indication, and is multiplexed into one wavelength channel by an optical coupler and uploaded. To the OLT.
  • GPON has the characteristics of high speed, large capacity and low cost of the optical layer, on the other hand, it realizes multi-channel data in the uplink direction.
  • Optical layer statistical multiplexing improves flexibility and bandwidth utilization.
  • GPON generally adopts a star/tree topology. Its working principle is suitable for carrying multi-point to single-point aggregation traffic (the north-south traffic dominates), so it is successfully applied and deployed on the access network.
  • OBTN Optical Burst Transport Network
  • OB optical burst
  • FIG. 1 is a schematic diagram of a 4-node OBTN unidirectional ring network. Each node is equipped with a pair of fast tunable burst transmitters and fast tunable burst receivers (which can be expanded into multiples). The whole network has two wavelengths as data channels. One wavelength is used as the control channel, and node A is the master node.
  • the technical characteristics of OBTN are briefly described as follows:
  • the most basic transmission unit in the data channel is OB. There are guard times between OBs as intervals. Several OBs form a data frame. The corresponding OB frames and OB slot start positions of different wavelength channels need to be aligned.
  • the data channel uses a burst optical receiver/transmitter. The burst data is directly transmitted by the optical layer between the source and sink nodes, and no intermediate node is required for electrical layer forwarding.
  • the source side needs to aggregate and encapsulate the client side data packets to the OB to send.
  • the control channel is separated from the data channel.
  • the OBTN uses independent wavelength channel bearer control information, including OAM (Operations Administration and Maintenance) information, a bandwidth report for collecting bandwidth requests of each node, and a bandwidth map indicating each node transmits/receives data, and
  • the control frame is sent before the corresponding data frame.
  • the control channel can use a common optical receiver/transmitter as a transceiver device, and each domain performs electrical domain processing to receive and update corresponding control information.
  • the OBTN node can quickly adjust (ns (nanosecond) level) transmitter/receiver transmit/receive wavelengths to select the corresponding wavelength and OB time slots for burst data transmission/reception according to the bandwidth map to implement OB-based full Light exchange.
  • the OBTN adopts a centralized control mode.
  • Each slave node periodically reports a bandwidth request to the master node through a control frame.
  • the master node performs wavelength and OB time slot allocation according to the current resource state and bandwidth allocation policy, and records the allocation result into the bandwidth map.
  • the control frame is distributed to each slave node to implement fast scheduling of optical layer resources according to traffic requirements.
  • the rapid scheduling of optical layer resources in the OBTN network causes sudden fluctuations in optical power in the data channel, and the fluctuation range is large.
  • the OBTN network adopts a burst-adaptive optical amplifying device to amplify the combined optical power in the line, but the burst optical amplifying device with a large range of optical power fluctuations has high cost, high technical difficulty, and is difficult to implement.
  • This paper proposes a method and system for controlling optical power that can reduce the fluctuation range of optical power of an OBTN network.
  • a method for controlling optical power, applied to an optical burst transmission network OBTN comprising:
  • a corresponding number of non-sudden optical signals are transmitted on the OBTN line in accordance with the number of non-burst optical signals.
  • the obtaining the number of burst optical signals output by each node includes: the primary node of the OBTN updates the bandwidth map, and obtains the output of each node in the (N+1)th time period according to the updated bandwidth map.
  • the number of illuminating signals; N is an integer greater than or equal to 1;
  • Determining, according to the number of burst optical signals output by each node, and the preset constraint conditions, the number of non-burst optical signals output by each node includes: the primary node outputs according to the (N+1)th time period of each node.
  • the corresponding number of non-burst optical signals on the OBTN line including: the non-sudden optical signal in the (N+1)th time period of each node determined by the master node
  • the number of each node is controlled to transmit a corresponding number of non-sudden optical signals during the (N+1)th time period.
  • the number of burst optical signals output by the node in the (N+1)th time period is the number of bursts of light used by the node for data transmission in the (N+1)th time period. And the sum of the number of bursts of light that forwards the data of other nodes.
  • obtaining the number of the burst optical signals of the output of each node further includes: the master node acquiring the number of burst optical signals output by each node in the first time period;
  • the preset constraint includes a first constraint condition, and determining, according to the number of burst optical signals output by each node, and the preset constraint condition, the number of non-burst optical signals output by each node further includes: The number of maximum output burst optical signals required during the first time period of the nodes, and the first constraint determines the number of non-burst optical signals output during the first time period of each node, the first constraint for:
  • a 1 is the number of maximum output burst optical signals required in the first time period of the node
  • X 1 is the number of non-burst optical signals required in the first time period of the node
  • P 1 is a burst.
  • P 2 is the minimum optical power of the non-burst optical signal input to the node's combiner
  • the maximum optical power and minimum optical power of any C channel The ratio between the two
  • B is the input transient response multiple of the output optical power amplifier of the node.
  • the preset constraint includes a second constraint, where the second constraint is:
  • a 2 is the number of output burst optical signals required in the Nth time period of the node
  • P 1 is the minimum optical power of the combiner of the burst optical signal input to the node
  • X 2 is the node.
  • P 2 is the minimum optical power of the combiner input to the node by the non-burst optical signal
  • a 3 is the (N+1)th time of the node
  • X 3 is the number of non-burst optical signals output during the (N+1)th period of the node
  • B is the input instant of the output optical power amplifier of the node State response multiple, the ratio between the maximum optical power and the minimum optical power of any channel of C.
  • the primary node is non-burst according to the determined (N+1) time period of each node.
  • the number of optical signals, controlling the corresponding number of non-burst optical signals transmitted during the (N+1)th time period of each node includes:
  • the master node generates control frame information according to the number of non-burst optical signals in the (N+1)th time period of each node, and controls each node by outputting a control frame carrying control frame information ( A corresponding number of pre-configured non-burst optical signal transmitting units are turned on or off during the N+1) period.
  • the obtaining the number of burst optical signals of each node's output includes: obtaining a maximum number of output burst optical signals required by each node;
  • the preset constraint includes a third constraint condition, and determining, according to the number of burst optical signals output by each node, and a preset constraint condition, the number of non-burst optical signals output by each node includes: according to each The number of maximum output burst optical signals required by the node, and a third constraint, determine the number of non-burst optical signals output by each node.
  • the third constraint is:
  • a 4 is the maximum number of output burst optical signals required by the node
  • X 4 is the number of non-burst optical signals required by the node
  • P 1 is the burst optical signal input to the node.
  • the minimum optical power of the combiner P 2 is the minimum optical power of the combiner input to the node of the non-burst optical signal
  • C is the light of any optical signal at the input end of the node of the node.
  • B is the input transient response multiple of the output optical power amplifier of the node.
  • a primary node including:
  • Obtaining a module set to: obtain the number of burst optical signals of each node's output;
  • the determining module is configured to: determine the number of non-burst optical signals output by each node according to the number of burst optical signals output by each node and preset constraints;
  • the control module is configured to: transmit a corresponding number of non-burst optical signals on the OBTN line according to the number of the non-burst optical signals.
  • the acquiring module is configured to: update the bandwidth map, and obtain, according to the updated bandwidth map, the number of burst optical signals output by each node in the (N+1)th time period; N is greater than Or an integer equal to 1;
  • the determining module is configured to: determine, according to the number of burst optical signals output during the (N+1)th time period of each node, the number of optical signals output during the Nth time period, and preset constraint conditions, The number of non-burst optical signals in the (N+1)th period of each node;
  • the control module is configured to: according to the determined number of non-burst optical signals in the (N+1)th time period of each node, control a corresponding number of non-transmissions in each (N+1)th time period of each node Burst light signal.
  • the acquiring module is further configured to: acquire the number of burst optical signals output by each node in the first time period;
  • the preset constraint includes a first constraint
  • the determining module is further configured to: according to a maximum number of output burst optical signals required in a first time period of each node, and the first constraint Determining the number of non-burst optical signals outputted by each node in a first time period, the first constraint condition is:
  • a 1 is the number of maximum output burst optical signals required in the first time period of the node
  • X 1 is the number of non-burst optical signals required in the first time period of the node
  • P 1 is a burst.
  • P 2 is the minimum optical power of the non-burst optical signal input to the node's combiner
  • the maximum optical power and minimum optical power of any C channel The ratio between the two
  • B is the input transient response multiple of the output optical power amplifier of the node.
  • the preset constraint includes a second constraint, and the second constraint is:
  • a 2 is the number of output burst optical signals required in the Nth time period of the node
  • P 1 is the minimum optical power of the combiner of the burst optical signal input to the node
  • X 2 is the node.
  • P 2 is the minimum optical power of the combiner input to the node by the non-burst optical signal
  • a 3 is the (N+1)th time of the node
  • X 3 is the number of non-burst optical signals output during the (N+1)th period of the node
  • B is the input instant of the output optical power amplifier of the node State response multiple, the ratio between the maximum optical power and the minimum optical power of any channel of C.
  • control module is configured to:
  • Control frame information is generated according to the determined number of non-burst optical signals in the (N+1)th time period of each node, and each node (N+1) is controlled by the output control frame carrying the control frame information.
  • a corresponding number of pre-configured non-burst optical signal transmitting units are turned on or off during the time period.
  • the acquiring module is configured to: obtain a maximum number of output burst optical signals required by each node;
  • the preset constraint includes a third constraint, and the determining module is configured to: determine, according to the maximum number of output burst optical signals required by each node, and the third constraint, determine the non-output of each node. The number of bursts of optical signals.
  • a system for controlling optical power comprising a master node as described above, further comprising a slave node, the slave node comprising: a non-burst optical signal transmitting unit and/or a non-burst optical signal receiving unit;
  • the non-burst optical signal sending unit is configured to: send or not transmit a non-sudden optical signal under the control of the primary node;
  • the non-burst optical signal receiving unit is configured to: receive the corresponding non-burst optical signal.
  • a computer readable storage medium storing computer executable instructions for performing the method of any of the above.
  • the master node controls each node to transmit a corresponding non-burst optical signal according to the number of burst optical signals of each node, so as to control the ratio of the output optical power of each node to a certain range. That is, the fluctuation range of the optical power of the OBTN network is reduced. In the embodiment of the present invention, since the non-burst optical signal is continuously transmitted between each node, the fluctuation range of the optical power of the OBTN network is reduced.
  • FIG. 1 is a schematic diagram of a 4-node OBTN unidirectional ring network
  • FIG. 2 is a flowchart of a method for controlling optical power according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for controlling optical power according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a master node according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an embodiment of a master node or a slave node according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of another embodiment of a master node according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of another embodiment of a slave node according to an embodiment of the present invention.
  • an embodiment of the present invention provides a method for controlling optical power, which is applied to an OBTN.
  • the method includes: Step 201: Acquire a number of burst optical signals output by each node;
  • Step 202 Determine, according to the number of burst optical signals output by each node, and preset constraint conditions, the number of non-burst optical signals output by each node;
  • Step 203 Transmit a corresponding number of non-burst optical signals on the OBTN line according to the number of the non-burst optical signals.
  • Scheme 1 According to the number of burst optical signals in the N+1th time period, and the number of optical signals output in the Nth time period (including the number of burst optical signals and the number of non-burst optical signals), and constraints, determine the first The number of non-burst optical signals for the N+1 time period.
  • the number of non-burst optical signals is calculated for each time period.
  • the first time period may be calculated according to the number of burst optical signals in the first time period and the constraint conditions. The number of bursts of optical signals.
  • Solution 2 Determine the number of non-burst optical signals output by each node according to the maximum number of output burst optical signals required by each node and constraints. In this technical solution, it is calculated only once, and it is not necessary to calculate the number of updated non-burst optical signals per time period.
  • step 300 the master node of the OBTN determines the number of non-burst optical signals that each node outputs during the first time period.
  • the number of non-burst optical signals outputted by each node in the first time period satisfies the first constraint condition, that is, formula (1):
  • a 1 is the number of maximum output burst optical signals required in the first time period of the node in the optical burst transmission network OBTN
  • X 1 is a non-burst optical signal required in the first time period of the node.
  • P 1 is the minimum optical power of the combiner that the burst optical signal is input to the node
  • P 2 is the minimum optical power of the combiner that the non-burst optical signal is input to the node
  • C is the combined wave at the node
  • B is the input transient response multiple of the output optical power amplifier of the node.
  • the optical power of the burst optical signal input to the combiner and the optical power of the non-burst optical signal input to the combiner are The dynamic range is consistent.
  • the input transient response multiple of the output optical power amplifier of the node refers to a sudden change in the response of the optical power input to the output optical power amplifier.
  • the sum of the maximum amplification factors of the input optical power amplifier and the output optical power amplifier may be the optical power insertion loss of the combiner of the previous node, the optical power insertion loss of the optical fiber between the previous node and the node, and the division of the node.
  • the optical power insertion loss of the combiner of the node D is known to be 6 dB
  • the optical power insertion loss of the optical fiber between the node D and the node A is 10 dB
  • the optical power insertion loss of the first splitter of the node A is 6dB
  • the optical power insertion loss of the second splitter of node A is 6dB
  • the optical power insertion loss of the optical burst switching unit of node A is 3dB, which is used for optical power insertion loss of each fiber joint connected between devices.
  • the total is 3dB.
  • Can configure the input optical power of node A The amplifier has a fixed gain of +17dB, and the output optical power amplifier of node D can be set to a fixed gain of +17dB.
  • the optical power amplifiers of node A and node D are both EDFA (Erbium-doped Optical Fiber Amplifier) erbium-doped fiber amplifiers.
  • the output optical power amplifier of the output optical power amplifier of node D is selected to have a dynamic response range of 10 dB (dB is the transient response multiple of the optical power amplifier, 10 dB is 10 times). Then, the optical power loss between the starting point of the node D and the ending point in the node A is configured to be 0 (-34 dB + 17 dB + 17 dB). That is, if the optical power value of the burst optical signal of the node D at the starting point is X, and the optical burst switching unit of the node A is directly connected, the optical power value reaching the end point of the node A is still X.
  • the master node A outputs to the slave node B, the slave node B output to the slave node C, the slave node C output to the slave node D, and the slave node D to the slave node A.
  • the transmitting unit that pre-configures the non-burst optical signal and the corresponding non-burst optical signal receiving unit are: Node A transmits, and the two non-burst wavelength signals ⁇ 1, ⁇ 2, ⁇ 1, and ⁇ 2 received by the node A are at the Node B.
  • C, D are straight-through, that is, a transmitting unit for transmitting the non-burst wavelength signals ⁇ 1, ⁇ 2 and a receiving unit for receiving the non-burst wavelength signals ⁇ 1, ⁇ 2 are configured in the node A; the node A transmits, and the node B receives 2 non-burst wavelength signals ⁇ 3, ⁇ 4; node B transmits, node C receives two non-burst wavelength signals ⁇ 3, ⁇ 4; node C transmits, node D receives two non-burst wavelength signals ⁇ 3, ⁇ 4; Node D transmits two non-burst wavelength signals ⁇ 3, ⁇ 4 received by node A.
  • the transmitting unit that can pre-configure the non-burst optical signal and the corresponding non-burst optical signal receiving unit are the Node A transmitting Node B receiving, the Node B transmitting the Node C receiving, the Node C transmitting the Node D, and the Node D sending the Node A receiving,
  • Each segment is configured with four non-burst wavelength signals ⁇ 1, ⁇ 2, ⁇ 3, ⁇ 4.
  • Step 301 The master node updates the bandwidth map, and obtains the number of burst optical signals output by each node in the (N+1)th time period according to the updated bandwidth map.
  • N is an integer greater than or equal to 1.
  • the number of burst optical signals output by the node in the (N+1)th time period is the number of bursts of light used by the node for data transmission in the (N+1)th time period and the data of the through-pass forwarding of other nodes. The sum of the number of bursts of light.
  • the control channel transceiver and processing unit of the master node A receives the control frame, the bandwidth request of the slave node B, the slave node C, the slave node D obtained from the control frame, and the client side service processing of the master node.
  • the bandwidth requirement of the primary node A generated by the unit is transmitted to the bandwidth map allocation unit, and the bandwidth map allocation unit performs bandwidth allocation calculation to generate a new bandwidth map.
  • the bandwidth map information is in the (N+1)th time period, and the number of burst optical signals that the node A needs to output is 0 wavelengths, and the number of burst optical signals output by the node B is 8 wavelengths, the number of burst optical signals output by node C is 1 wavelength, and the number of burst optical signals output by node D is 16 wavelengths, wherein the service of node D to node A with higher priority needs to be transmitted. Two wavelengths are required for transmission.
  • Step 302 The master node determines the number of each node according to the number of burst optical signals output in the (N+1)th time period of each node, the number of optical signals output in the Nth time period, and preset constraint conditions. (N+1) The number of non-sudden optical signals during the time period.
  • the number of optical signals outputted in the Nth time period includes: the number of burst optical signals outputted in the Nth time period and the number of non-burst optical signals.
  • the number of burst optical signals output by the node A is 16 wavelengths, and the non-burst optical signals ⁇ 1 and ⁇ 2 are already turned on; the burst light output by the node B The number of signals is 16 wavelengths, and the non-burst optical signals ⁇ 3 and ⁇ 4 are not turned on; the number of burst optical signals outputted by the node C is 16 wavelengths, and the non-burst optical signals ⁇ 3 and ⁇ 4 are not turned on; the burst light output by the node D The number of signals is 16 wavelengths, and the non-burst optical signals ⁇ 3 and ⁇ 4 are not turned on, and the number of optical signals outputted in the Nth period of the node A, the node B, the node C, and the node D is 18.
  • a 2 is the number of output burst optical signals required in the Nth time period of the node
  • P 1 is the minimum optical power of the combiner that the burst optical signal is input to the node
  • X 2 is the Nth time of the node.
  • the number of non-burst optical signals outputted in the segment P 2 is the minimum optical power input to the node combiner by the non-burst optical signal, and A 3 is the desired output in the (N+1)th time period of the node
  • the number of burst optical signals X 3 is the number of non-burst optical signals output during the (N+1)th period of the node
  • B is the input transient response multiple of the output optical power amplifier of the node
  • C is an arbitrary channel The ratio between the maximum optical power and the minimum optical power.
  • the master node calculates the result according to the formula (2) as follows. It is obvious that A 2 , A 3 , X 2 , and X 3 are integers greater than or equal to 0.
  • Step 303 The master node controls, according to the number of non-burst optical signals in the (N+1)th time period of each node, to transmit a corresponding number of non-burst optical signals in the (N+1)th time period of each node.
  • the master node performs the following operations in the (N+1)th time period:
  • the master node A keeps on turning on the non-burst wavelength signals ⁇ 1 and ⁇ 2, and newly opens the non-burst of the node.
  • Node B receives the master node control information and does not operate
  • Node C receives the control information of the master node, and newly opens the non-burst wavelength signal ⁇ 3 or ⁇ 4 of the node;
  • Node D receives the master node control information because the traffic of node D to node A with higher priority needs to be transmitted, requiring 2 wavelength transmissions.
  • the non-burst wavelength signals ⁇ 3 and ⁇ 4 that open the node can be added to deliver high priority services.
  • the master node turns on or off the pre-configured non-burst optical signal transmitting unit according to the number of non-burst optical signals in the (N+1)th time period of each node.
  • the non-burst optical signal transmitting unit and the corresponding non-burst optical signal receiving unit may be configured in advance in one or more nodes.
  • the non-burst optical signal transmitting unit and the non-sudden optical signal receiving unit are pre-configured in the node A.
  • node A calculates that a non-burst optical signal needs to be transmitted in node B during the (N+1)th time period, two non-burst optical signals need to be transmitted in node C and node D, then node A is The non-burst optical signal transmitting unit is turned on in the (N+1)th period to transmit two non-burst optical signals, and the two non-burst optical signals that are turned on are finally transmitted through the node B, the node C, and the node D. The node A is received by the non-burst optical signal receiving unit of the node A.
  • the wavelength of the non-sudden optical signal may be any wavelength of the non-burst optical signal that is not used in the (N+1)th time period.
  • the non-burst optical signal may be an optical signal without information or an optical signal for transmitting arbitrary information.
  • the non-burst optical signal can transmit the service data with higher priority, and can also serve as a fixed information channel.
  • the master node may control each node to open or close the non-burst optical signal by sending a control frame.
  • the master node controls each node to open in the (N+1)th time period according to the number of non-burst optical signals in the (N+1)th time period of each node through the output control frame carrying the control frame information.
  • a corresponding number of pre-configured non-burst optical signal transmitting units are turned off.
  • the control frame information may include a node identifier, and one or more non-burst optical signal sending units that indicate the node.
  • the logo that is turned on or off.
  • the node identifier may be a node name, and the identifier indicating that one or more non-burst optical signal sending units of the node are turned on or off may include two parts, one part needs to be turned on or off, and the other part is a non-burst optical signal transmission. The identity of the unit.
  • each node after receiving the control frame, each node searches for the corresponding indication of opening or closing in the corresponding relationship of the control frame, thereby opening and closing the non-burst optical signal.
  • each node turns on or off the non-burst optical signal in the (N+1)th time period under the control of the master node, and requests the bandwidth in the (N+2) time period. Send to the next node.
  • obtaining the number of burst optical signals output by each node may include: acquiring the maximum number of output burst optical signals required by each node;
  • the preset constraint includes a third constraint condition, and step 202, determining, according to the number of burst optical signals output by each node, and a preset constraint condition, the number of non-burst optical signals output by each node includes: The number of maximum output burst optical signals required by the nodes, and the third constraint, determine the number of non-burst optical signals output by each node.
  • a 4 is the maximum number of output burst optical signals required by the node
  • X 4 is the number of non-burst optical signals required by the node
  • P 1 is the burst optical signal input to the node.
  • the minimum optical power of the combiner P 2 is the minimum optical power of the combiner input to the node of the non-burst optical signal
  • C is the light of any optical signal at the input end of the node of the node.
  • B is the input transient response multiple of the output optical power amplifier of the node.
  • the master node A outputs to the slave node B, the slave node B output to the slave node C, the slave node C output to the slave node D, and the slave node D to the slave node A.
  • the transmitting unit that pre-configures the non-burst optical signal and the corresponding non-sudden optical signal receiving unit continuously transmit, for example, the four persistent non-burst wavelength signals ⁇ 1, ⁇ 2, ⁇ 3, ⁇ 4 transmitted by the node A and transmitted by the node A. It is through when passing through nodes B, C, and D.
  • the non-sudden optical signal may be an optical signal without information or an optical signal for transmitting arbitrary information.
  • the non-burst optical signal can transmit the service data with higher priority and can also serve as a fixed information channel.
  • an embodiment of the present invention further provides a master node, including:
  • the obtaining module 41 is configured to: acquire the number of burst optical signals output by each node;
  • the determining module 42 is configured to: determine the number of non-burst optical signals output by each node according to the number of burst optical signals output by each node, and preset constraints;
  • the control module 43 is configured to transmit a corresponding number of non-sudden optical signals on the OBTN line according to the number of the non-burst optical signals.
  • the obtaining module 41 is configured to: update the bandwidth map, and obtain, according to the updated bandwidth map, the number of burst optical signals output by each node in the (N+1)th time period; N is an integer greater than or equal to 1;
  • the determining module 42 is configured to: determine each node according to the number of burst optical signals output during the (N+1)th time period of each node, the number of optical signals output during the Nth time period, and preset constraints The number of non-burst optical signals in the (N+1)th time period determines the number of non-burst optical signals in the (N+1)th time period of each node;
  • the control module 43 is configured to: generate control frame information according to the determined number of non-burst optical signals in the (N+1)th time period of each node, output a control frame, and control the (N+1)th time of each node. A corresponding number of non-burst optical signals are transmitted within the segment.
  • the determining module 42 is configured to:
  • a 2 is the number of output burst optical signals required in the Nth time period of the node
  • P 1 is the minimum optical power of the combiner that the burst optical signal is input to the node
  • X 2 is the Nth time of the node.
  • the number of non-burst optical signals outputted in the segment P 2 is the minimum optical power input to the node combiner by the non-burst optical signal, and A 3 is the desired output in the (N+1)th time period of the node
  • the number of burst optical signals, X 3 is the number of non-burst optical signals output during the (N+1)th period of the node, and B is the input transient response multiple of the output optical power amplifier of the node, where C is The ratio between the maximum and minimum values of the optical power of any optical signal at the input of the node.
  • control module 43 is configured to:
  • Control frame information is generated according to the determined number of non-burst optical signals in the (N+1)th time period of each node, and each node (N+1) is controlled by the output control frame carrying the control frame information.
  • a corresponding number of pre-configured non-burst optical signal transmitting units are turned on or off during the time period.
  • the obtaining module 41 is further configured to: acquire the number of burst optical signals output by each node in the first time period;
  • the preset constraint includes a first constraint
  • the determining module 42 is further configured to: according to a maximum number of output burst optical signals required in a first time period of each node, and the first constraint The condition determines the number of non-burst optical signals output by the first time period of each node, the first constraint condition being:
  • a 1 is the number of maximum output burst optical signals required in the first time period of the node
  • X 1 is the number of non-burst optical signals required in the first time period of the node
  • P 1 is a burst.
  • P 2 is the minimum optical power of the non-burst optical signal input to the node's combiner
  • the maximum optical power and minimum optical power of any C channel The ratio between the two
  • B is the input transient response multiple of the output optical power amplifier of the node.
  • the obtaining module 41 is configured to: acquire the maximum number of output burst optical signals required by each node;
  • the preset constraint includes a third constraint
  • the determining module 42 is configured to: determine, according to the maximum number of output burst optical signals required by each node, and the third constraint, determine the output of each node. The number of non-burst optical signals.
  • the third constraint is:
  • a 4 is the maximum number of output burst optical signals required by the node
  • X 4 is the number of non-burst optical signals required by the node
  • P 1 is the burst optical signal input to the node.
  • the minimum optical power of the combiner P 2 is the minimum optical power of the combiner input to the node of the non-burst optical signal
  • C is the light of any optical signal at the input end of the node of the node.
  • B is the input transient response multiple of the output optical power amplifier of the node.
  • the embodiment of the present invention further provides a system for controlling optical power, comprising the primary node as described above, further comprising a slave node, the slave node comprising: a non-burst optical signal transmitting unit and/or a non-burst optical signal receiving unit;
  • the non-burst optical signal sending unit is configured to: send or not transmit a non-sudden optical signal under the control of the primary node;
  • the non-burst optical signal receiving unit is configured to: receive the corresponding non-burst optical signal.
  • the non-sudden optical signal transmitting unit may be configured to transmit a non-sudden optical signal of a fixed wavelength, and the non-sudden optical signal receiving unit may be configured to receive a non-burst optical signal of an arbitrary wavelength.
  • Figure 5 is a schematic diagram of the structure of a master node or a slave node, see Figure 5, including:
  • the input optical power amplifier 5061 is configured to perform work on the combined optical signal from the previous node. Rate amplification
  • the first demultiplexer 500 is configured to: separate the control channel wavelength and the data channel wavelength in the amplified combined optical signal, send the control channel wavelength to the control channel transceiver and processing unit 504, and send the data channel wavelength to the second point.
  • the second demultiplexer 501 is configured to: separate the burst optical signal and the non-burst optical signal in the data channel, send the burst optical signal to the optical burst switching unit 502, and send the non-burst optical signal to the combined wave 503;
  • the second demultiplexer 501 may be a Wavelength Selective Switch (WSS) or an Arrayed Waveguide Grating (AWG).
  • WSS Wavelength Selective Switch
  • AWG Arrayed Waveguide Grating
  • the control channel transceiver and processing unit 504 is configured to: receive and parse control frame information of the control channel, control optical burst switching of the optical burst switching unit 502, receive bandwidth requirements of the client side service processing unit 505, and generate a new control frame. , the control frame is sent to the combiner 503;
  • the optical burst switching unit 502 is configured to perform optical burst switching on the burst optical signal output by the second splitter 501 and the burst optical signal of the client side service processing unit 505.
  • the command to receive the control channel transceiving and processing unit 504 operates.
  • the burst optical signal received by the local node is sent by the optical burst switching unit 502 to the client side service processing unit 505.
  • the burst optical signal sent by the local node is sent to the optical burst switching unit 502 by the client side service processing unit 505.
  • the optical burst switching unit 502 outputs the multiplexer 503; the burst optical signal that is not processed by the local node is directly transmitted by the optical burst switching unit 502 to the multiplexer 503.
  • the optical burst switching unit 502 can be implemented with a fast optical switch array.
  • the client-side service processing unit 505 is configured to: perform optical burst transmission and optical burst reception on the burst optical signal, and receive client side data for data storage, generate bandwidth requirements of the node, and send bandwidth requirements to the control channel for sending and receiving.
  • Processing unit 504 is configured to: perform optical burst transmission and optical burst reception on the burst optical signal, and receive client side data for data storage, generate bandwidth requirements of the node, and send bandwidth requirements to the control channel for sending and receiving.
  • the combiner 503 is configured to: perform wavelength division multiplexing on the control channel wavelength, the burst optical signal, and the non-burst optical signal, and then send the combined wave to the output optical power amplifier 5062;
  • the output optical power amplifier 5062 is configured to: after the power is amplified by the multiplexed wave, sent to the next node.
  • FIG. 6 is a schematic structural diagram of another main node, see FIG. 6, including:
  • the input optical power amplifier 6061 is configured to perform work on the combined optical signal from the previous node. Rate amplification
  • the third demultiplexer 600 is configured to: separate the control channel and the data channel in the amplified multiplexed wave, send the control channel to the control channel transceiver and processing unit 604, and send the data channel to the fourth splitter 601;
  • the fourth demultiplexer 601 is configured to: separate the burst optical signal and the non-burst optical signal in the data channel, send the burst optical signal to the optical burst switching unit 602, and send the non-burst optical signal to the combined wave 603, or sent to the non-burst optical signal receiving unit 6053;
  • the optical burst switching unit 602 is configured to perform optical burst exchange between the burst optical signal output by the fourth demultiplexer 601 and the burst optical signal of the client side control unit 605.
  • the command to receive the control channel transceiving and processing unit 604 operates.
  • the burst optical signal received by the local node is sent by the optical burst switching unit 602 to the burst optical signal receiving unit 6051 of the client side control unit 605; the burst optical signal sent by the local node is controlled by the client side control unit 605.
  • the burst optical signal sending unit 6052 is connected to the optical burst switching unit 602, and then output by the optical burst switching unit 602 to the combiner 603; the burst optical signal that is not processed by the local node is directly transmitted by the optical burst switching unit 602.
  • the combiner 603 is given.
  • the optical burst switching unit 602 can be implemented with a fast optical switch array.
  • the client side control unit 605 includes a burst optical signal receiving unit 6051 and a burst optical signal transmitting unit 6052, a non-burst optical signal receiving unit 6053 and a non-burst optical signal transmitting unit 6054, a client side data processing unit 6055;
  • the burst optical signal receiving unit 6051 photoelectrically converts the burst optical signal, and the burst optical signal transmitting unit 6052 performs electro-optical conversion on the burst optical signal.
  • the client side data processing unit 6055 receives the client side data for data storage, and then sends the data to the burst optical signal sending unit 6052.
  • the client side data processing unit 6055 receives the data of the burst optical signal receiving unit 6051 for data storage, and then sends the data to the data.
  • Customer side The client side data processing unit 6055 generates a bandwidth requirement of the own node, and transmits the bandwidth requirement to the control channel transceiver and processing unit 604.
  • the non-sudden optical signal receiving unit 6053 and the non-sudden optical signal transmitting unit 6054 are pre-configured to receive and transmit one or more fixed-wavelength non-sudden optical signals.
  • the non-burst optical signal transmitted may be an informationless optical signal, or may carry any information or transmission excellent The optical signal of the higher priority business data.
  • the client-side data processing unit 6055 receives the client-side data for data storage, and can transmit the data to the non-sudden optical signal transmitting unit 6054 for transmission.
  • the client-side data processing unit 6055 can also receive the data of the non-sudden optical signal receiving unit 6053 for data storage. And then sent to the client side.
  • the control channel transceiver and processing unit 604 is configured to: receive and parse the control frame information of the control channel, and send the bandwidth request in the next time period of each slave node to the bandwidth map allocating unit 607, and the local node client side control unit 605
  • the bandwidth requirement in the next time period is also sent to the bandwidth map allocating unit 607; the burst optical signal and the corresponding number output by each node in the next time period are obtained according to the updated bandwidth map; according to each node at the next time
  • the number of burst optical signals outputted in the segment determines the number of non-burst optical signals of each node, the burst optical signal information of each slave node in the next time period and the determined number of non-burst optical signals of the slave nodes Converted into control frame information, the control channel wavelength is sent to the combiner 603.
  • the control channel transceiving and processing unit 604 simultaneously controls the local client side control unit 605 and the optical burst switching unit 602 in the next time period, and can turn on or off one or more non-burst optical signal transmitting units 6054 of the own node.
  • the bandwidth map allocating unit 607 is configured to: update the bandwidth map according to the bandwidth request of each node, and send the updated bandwidth map to the control channel transceiver and processing unit 604;
  • the combiner 603 is configured to: a burst optical signal from the optical burst switching unit 602, a non-burst optical signal from the fourth splitter 601, and non-burst light from the non-burst optical signal transmitting unit 6054.
  • the signal, the control channel from the control channel transceiver and processing unit 604 is combined, the combined optical signal is sent to the output optical power amplifier 6062;
  • the output optical power amplifier 6062 is configured to: optically amplify the combined wave and transmit it to the next node.
  • FIG. 7 is a schematic structural diagram of another slave node, see FIG. 7, including:
  • the input optical power amplifier 7061 is configured to: perform power amplification on the combined optical signal from the previous node;
  • the fifth demultiplexer 700 is configured to: separate the control channel and the data channel in the amplified multiplexed optical signal, send the control channel to the control channel transceiver and processing unit 704, and send the data channel to the sixth demultiplexer 701;
  • the sixth demultiplexer 701 is configured to: separate the burst optical signal and the non-burst optical signal in the data channel, send the burst optical signal to the optical burst switching unit 702, and send the non-burst optical signal to the combined wave 703, or sent to the non-burst optical signal receiving unit 7053;
  • the optical burst switching unit 702 is configured to: send the burst optical signal to the burst optical signal receiving unit 706, or to the combiner 703; and send the burst optical signal from the burst optical signal sending unit 707 to the combined Wave 703;
  • the optical burst switching unit 702 is configured to perform optical burst exchange between the burst optical signal output by the fourth demultiplexer 701 and the burst optical signal of the client side service processing unit 705.
  • the command to receive the control channel transceiver and processing unit 704 operates.
  • the burst optical signal received by the local node is sent by the optical burst switching unit 702 to the burst optical signal receiving unit 7051 of the client side service processing unit 705; the burst optical signal sent by the local node is processed by the client side service processing unit.
  • the burst optical signal sending unit 7052 of the 705 is sent to the optical burst switching unit 702, and then output by the optical burst switching unit 702 to the combiner 703; the burst optical signal that is not processed by the local node is received by the optical burst switching unit 702.
  • the straight pass is sent to the combiner 703.
  • the optical burst switching unit 702 can be implemented with a fast optical switch array.
  • the client side control unit 705 includes a burst optical signal receiving unit 7051 and a burst optical signal transmitting unit 7052, a non-burst optical signal receiving unit 7053 and a non-burst optical signal transmitting unit 7054, a client side data processing unit 7055;
  • the burst optical signal receiving unit 7051 and the burst optical signal transmitting unit 7052 perform photoelectric and electro-optical conversion on the burst optical signal.
  • the client side data processing unit 7055 receives the client side data for data storage, and then sends the data to the burst optical signal sending unit 7052.
  • the client side data processing unit 7055 receives the data of the burst optical signal receiving unit 7051 for data storage, and then sends the data to the data.
  • Customer side The client side data processing unit 7055 generates the bandwidth requirement of the local node, and transmits the bandwidth requirement to the control channel transceiver and processing unit 704.
  • the non-sudden optical signal receiving unit 7053 and the non-sudden optical signal transmitting unit 7054 are pre-configured to receive and transmit one or more fixed-wavelength non-sudden optical signals.
  • the transmitted non-sudden optical signal may be an optical signal without information, or may be an optical signal carrying any information or transmitting service data with higher priority.
  • the client-side data processing unit 7055 receives the client-side data for data storage, and can transmit the data to the non-sudden optical signal transmitting unit 7054 for transmission.
  • the data processing unit 7055 can also receive the data of the non-sudden optical signal receiving unit 7053 for data storage, and then transmit it to the client side.
  • the control channel transceiver and processing unit 704 is configured to: receive and parse control frame information of the control channel.
  • the control channel transceiver unit 704 acquires the burst optical signal information of the node in the next time period, and controls the optical burst switching unit 702 to perform an action.
  • the control channel transceiving and processing unit 704 acquires non-burst optical signal information of the local node in the next time period, and turns on or off one or more non-burst optical signal transmitting units 7054 of the local node.
  • the control channel transceiver and processing unit 704 also converts the bandwidth requirement in the next time period of the node client side control unit 705 into control frame information, and sends the control channel wavelength to the combiner 703.
  • the combiner 703 is configured to: a burst optical signal from the optical burst switching unit 702, a non-burst optical signal from the sixth demultiplexer 701, and non-burst light from the non-sudden optical signal transmitting unit 7054.
  • the signal, the control channel from the control channel transceiver and processing unit 704 is combined, the combined optical signal is sent to the output optical power amplifier 7062;
  • the output optical power amplifier 7062 is configured to: optically amplify the combined wave and send it to the next node.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • the device/function module/functional unit in the above embodiment When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the master node controls each node to transmit a corresponding non-burst optical signal according to the number of burst optical signals of each node, thereby controlling the output optical power variation ratio of each node within a certain range, that is, subtracting The fluctuation range of the optical power of the OBTN network is small. And, continuously transmitting non-burst optical signals between each node reduces the fluctuation range of the optical power of the OBTN network.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un procédé et un système permettant de commander la puissance optique, le procédé comprenant les étapes suivantes : acquérir le nombre de signaux optiques en rafale fournis en sortie par chaque nœud; déterminer le nombre de signaux optiques non en rafale fournis en sortie par chaque nœud selon le nombre de signaux optiques en rafale fournis en sortie par chaque nœud et des conditions de contrainte prédéfinies; et transmettre le nombre correspondant de signaux optiques non en rafale sur une ligne OBTN selon le nombre de signaux optiques non en rafale.
PCT/CN2015/090453 2014-11-28 2015-09-23 Procédé et système permettant de commander la puissance optique WO2016082613A1 (fr)

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CN101197626A (zh) * 2006-12-08 2008-06-11 通用仪表公司 用于控制在无源光网络中使用的光放大器的方法和装置
CN101895345A (zh) * 2009-05-22 2010-11-24 华为技术有限公司 突发光信号放大方法、突发光放大器及系统和通信系统
CN102136870A (zh) * 2010-01-22 2011-07-27 华为技术有限公司 一种突发光信号的放大方法、装置和系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101197626A (zh) * 2006-12-08 2008-06-11 通用仪表公司 用于控制在无源光网络中使用的光放大器的方法和装置
CN101895345A (zh) * 2009-05-22 2010-11-24 华为技术有限公司 突发光信号放大方法、突发光放大器及系统和通信系统
CN102136870A (zh) * 2010-01-22 2011-07-27 华为技术有限公司 一种突发光信号的放大方法、装置和系统

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