WO2018166381A1 - 光信号的功率控制方法、装置及光线路终端 - Google Patents

光信号的功率控制方法、装置及光线路终端 Download PDF

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Publication number
WO2018166381A1
WO2018166381A1 PCT/CN2018/078245 CN2018078245W WO2018166381A1 WO 2018166381 A1 WO2018166381 A1 WO 2018166381A1 CN 2018078245 W CN2018078245 W CN 2018078245W WO 2018166381 A1 WO2018166381 A1 WO 2018166381A1
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WIPO (PCT)
Prior art keywords
onu
optical signal
registration
gain
optical
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PCT/CN2018/078245
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English (en)
French (fr)
Inventor
杨巍
黄新刚
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中兴通讯股份有限公司
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Priority to EP18766962.7A priority Critical patent/EP3598667A4/en
Publication of WO2018166381A1 publication Critical patent/WO2018166381A1/zh

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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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0773—Network aspects, e.g. central monitoring of transmission parameters
    • 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
    • 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
    • H04B10/27—Arrangements for networking
    • H04B10/272—Star-type networks or tree-type networks
    • 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
    • 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
    • H04B10/50—Transmitters
    • H04B10/564—Power control

Definitions

  • the present invention relates to the field of communications, and in particular to a power control method and apparatus for an optical signal and an optical line terminal.
  • an optical amplifier commonly used in a communication system is an Erbium-doped Optical Fiber Amplifier (EDFA) and a Semiconductor Optical Amplifier (SOA). Due to its relatively flat and wide gain spectrum, fast dynamic response, and integration, SOA has attracted more and more attention and become a good choice for optical amplifier components in the optical access field.
  • EDFA Erbium-doped Optical Fiber Amplifier
  • SOA Semiconductor Optical Amplifier Due to its relatively flat and wide gain spectrum, fast dynamic response, and integration, SOA has attracted more and more attention and become a good choice for optical amplifier components in the optical access field.
  • optical network units optical network units
  • OLTs optical line terminals
  • the equalization problem of the uplink signal amplification of the ONU of the optical network unit has not yet proposed an effective solution.
  • the embodiment of the invention provides a power control method and device for an optical signal and an optical line terminal, so as to at least solve the equalization problem of the uplink burst signal amplification of the ONU of the optical network unit in the related art.
  • a power control method for an optical signal including: acquiring different times when an uplink optical signal of each optical network unit ONU reaches an optical signal amplifier or a dimming optical attenuator; establishing the ONU ID Corresponding relationship with the power control factor of the uplink optical signal; performing power control on the uplink optical signal according to the different time and the corresponding relationship.
  • the power control factor comprises at least one of: a gain of the optical signal amplifier, and an attenuation of the tunable optical attenuator.
  • establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal includes: allocating a registration time slot, and sending a downlink registration a signal; when the ONU receives the downlink registration signal and determines that the power requirement of the registration time slot is met, starting registration and establishing a correspondence between the ONU ID and the gain of the optical signal amplifier.
  • establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal includes: allocating a registration time slot, and transmitting the downlink a registration signal, wherein the downlink registration signal includes gain information of the optical signal amplifier; when the ONU receives the downlink registration signal and determines that the optical signal amplifier gain minimum registration time slot, increase the optical signal amplifier gain until correctly received The serial number sent by the ONU; establishing a correspondence between the ONU ID and the gain of the optical signal amplifier.
  • establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal includes: allocating a registration time slot, and sending the downlink a registration signal, wherein the registration time slot is pre-assigned an attenuation value; when the ONU receives the downlink registration signal and determines that the power requirement of the registration time slot is met, the registration starts and the ONU ID and the dimmable optical attenuator are established. The relationship between attenuation.
  • establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal includes: setting attenuation of the tunable optical attenuator The maximum time is allocated; the registration time slot is allocated, and the downlink registration signal is sent, wherein the downlink registration signal includes the attenuation information of the tunable optical attenuator; the downlink registration signal is received by the ONU and the actual gain of the optical signal amplifier is determined to be minimum.
  • the time slot reduce the attenuation of the tunable attenuator until the serial number sent by the ONU is correctly received; establish the attenuation relationship between the ONU ID and the tunable optical attenuator.
  • establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal includes: assigning a registration a time slot and transmitting a downlink registration signal, wherein the registration time slot optical signal amplifier is provided with a pre-assigned gain, the tunable optical attenuator is provided with a pre-assigned attenuation; and the downlink registration signal is received at the ONU
  • registration time slot optical signal amplifier is provided with a pre-assigned gain
  • the tunable optical attenuator is provided with a pre-assigned attenuation
  • establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal includes: setting light The actual gain of the signal amplifier is minimum; the registration time slot is allocated, and the downlink registration signal is transmitted, wherein the downlink registration signal includes the actual gain information of the optical signal amplifier; the downlink registration signal is received at the ONU and the actual gain of the optical signal amplifier is determined
  • the minimum time slot is registered, the optical signal amplifier gain is increased until the serial number sent by the ONU is correctly received; the correspondence between the ONU ID, the optical signal amplifier gain, and the tunable optical attenuator attenuation is established.
  • the number of the optical signal amplifier or the dimmable optical attenuator is multiple.
  • the upstream optical signal is subjected to respective power control via a common optical signal amplifier before the upstream optical signal reaches the plurality of optical signal amplifiers and/or the tunable optical attenuator.
  • the corresponding relationship is multiple, where the multiple correspondences are each ONU ID and corresponding The relationship between the power control factors of the upstream optical signals.
  • a power control apparatus for an optical signal including: an acquisition module, configured to acquire different time times when an uplink optical signal of each optical network unit ONU reaches an optical signal amplifier; Establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal; and the control module is configured to perform power control on the uplink optical signal according to the different time and the corresponding relationship.
  • the power control factor comprises at least one of: a gain of the optical signal amplifier, and an attenuation of the tunable optical attenuator.
  • the establishing module includes: a first allocating unit, configured to allocate a registration time slot when the power control factor is a gain of the optical signal amplifier, and send a downlink registration signal; the first establishing unit is set to When the ONU receives the downlink registration signal and determines that the power requirement of the registration slot is satisfied, registration is started and a correspondence between the ONU ID and the gain of the optical signal amplifier is established.
  • the establishing module includes: a second allocating unit configured to allocate a registration time slot when the power control factor is a gain of the optical signal amplifier, and send a downlink registration signal, where the downlink registration signal The gain information of the optical signal amplifier is included; the first adding unit is configured to increase the optical signal amplifier gain until the ONU transmits the correct signal when the ONU receives the downlink registration signal and determines that the optical signal amplifier gains the minimum registration time slot. a serial number; a second establishing unit configured to establish a correspondence between the ONU ID and the optical signal amplifier gain.
  • the establishing module includes: a third allocating unit configured to allocate a registration time slot when the power control factor is attenuated by the tunable optical attenuator, and send a downlink registration signal, where the registration time slot is Pre-allocating an attenuation value; the third establishing unit is configured to start registration and establish an ONU ID and the dimmable optical attenuator when the ONU receives the downlink registration signal and determines that the power requirement of the registration time slot is met Attenuation relationship.
  • a third allocating unit configured to allocate a registration time slot when the power control factor is attenuated by the tunable optical attenuator, and send a downlink registration signal, where the registration time slot is Pre-allocating an attenuation value
  • the third establishing unit is configured to start registration and establish an ONU ID and the dimmable optical attenuator when the ONU receives the downlink registration signal and determines that the power requirement of the registration time slot is met Attenuation relationship.
  • the establishing module includes: a first setting unit configured to set the attenuation of the tunable optical attenuator to be maximum when the power control factor is the attenuation of the tunable optical attenuator; and the fourth allocating unit is configured to Allocating a registration time slot and transmitting a downlink registration signal, wherein the downlink registration signal includes attenuation information of the tunable optical attenuator; and the reducing unit is configured to receive the downlink registration signal at the ONU and determine that the optical signal amplifier is actually When the gain is minimum registered time slot, the attenuation of the tunable optical attenuator is reduced until the sequence number sent by the ONU is correctly received; and the fourth establishing unit is set to establish an attenuation relationship between the ONU ID and the tunable optical attenuator.
  • the establishing module includes: a fifth allocating unit configured to allocate a registration time slot when the power control factor is a gain of the optical signal amplifier and an attenuation of the tunable optical attenuator, and send a downlink registration signal, where In the registration time slot, the optical signal amplifier is provided with a pre-assigned gain, the dimmable optical attenuator is provided with a pre-assigned attenuation; and the fifth establishing unit is configured to receive the downlink registration signal at the ONU and determine the match When the power requirement of the time slot is registered, registration is started and a correspondence between the ONU ID, the optical signal amplifier gain, and the tunable optical attenuator attenuation is established.
  • a fifth allocating unit configured to allocate a registration time slot when the power control factor is a gain of the optical signal amplifier and an attenuation of the tunable optical attenuator, and send a downlink registration signal, where In the registration time slot, the optical signal amplifier is provided with a pre-assigned
  • the establishing module includes: a second setting unit configured to set a minimum gain of the optical signal amplifier when the power control factor is a gain of the optical signal amplifier and an attenuation of the adjustable optical attenuator; An allocation unit, configured to allocate a registration time slot, and send a downlink registration signal, where the downlink registration signal includes actual gain information of the optical signal amplifier; and the second adding unit is configured to receive the downlink registration signal at the ONU and determine that the When the actual gain of the optical signal amplifier is minimum registered time slot, the optical signal amplifier gain is increased until the serial number sent by the ONU is correctly received; the sixth establishing unit is set to establish the ONU ID, the optical signal amplifier gain, and the adjustable optical attenuator attenuation. Correspondence.
  • the number of the optical signal amplifier or the dimmable optical attenuator is multiple.
  • the upstream optical signal is subjected to corresponding power control via a common optical signal amplifier before the upstream optical signal reaches the plurality of optical signal amplifiers and/or the tunable optical attenuator.
  • the corresponding relationship is multiple, where the multiple correspondences are each ONU ID and corresponding The relationship between the power control factors of the upstream optical signals.
  • an optical line termination OLT is also provided, including the apparatus described above.
  • a storage medium is also provided.
  • the storage medium is arranged to store program code for performing the following steps:
  • an electronic device comprising a memory and a processor, wherein the memory stores a computer program, the processor being arranged to run the computer program to perform any of the above The steps in the method embodiments.
  • the time when the uplink optical signal of each optical network unit ONU reaches the optical signal amplifier or the tunable optical attenuator is obtained; and the correspondence between the ONU ID and the power control factor of the uplink optical signal is established;
  • the technical effect of reducing the receiving power range requirement of the OLT receiver is achieved.
  • FIG. 1 is a flow chart of a power control method of an optical signal according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram (1) of a power control structure of an optical signal according to an embodiment of the present invention
  • FIG. 3 is a system block diagram of an ONU registration according to an embodiment of the present invention.
  • FIG. 4 is a flowchart (I) of ONU registration according to an embodiment of the present invention.
  • FIG. 5 is a flowchart (2) of an ONU registration according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a power control structure of an optical signal according to an embodiment of the present invention (2);
  • FIG. 7 is a schematic diagram of a power control structure of an optical signal according to an embodiment of the present invention (3);
  • FIG. 8 is a flowchart (3) of an ONU registration according to an embodiment of the present invention.
  • FIG. 9 is a flowchart (4) of an ONU registration according to an embodiment of the present invention.
  • FIG. 10 is a flowchart (5) of ONU registration according to an embodiment of the present invention.
  • FIG. 11 is a flowchart (6) of an ONU registration according to an embodiment of the present invention.
  • FIG. 12 is a diagram showing the power control structure of a multi-channel optical signal according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of a power control structure of a multi-channel optical signal according to an embodiment of the present invention.
  • FIG. 14 is a schematic diagram of a power control structure of a multi-channel optical signal according to an embodiment of the present invention (2);
  • 15 is a schematic diagram of a power control structure of a multi-channel optical signal according to an embodiment of the present invention (3);
  • 16 is a schematic diagram of a power control structure of a multi-channel optical signal according to an embodiment of the present invention (4);
  • 17 is a schematic diagram of a power control structure of a multi-channel optical signal according to an embodiment of the present invention (5);
  • FIG. 18 is a block diagram showing the structure of a power control apparatus for an optical signal according to an embodiment of the present invention.
  • 19 is a structural block diagram (1) of a power control apparatus for an optical signal according to an embodiment of the present invention.
  • 20 is a structural block diagram (2) of a power control apparatus for an optical signal according to an embodiment of the present invention.
  • 21 is a structural block diagram (3) of a power control apparatus for an optical signal according to an embodiment of the present invention.
  • FIG. 22 is a structural block diagram (4) of a power control apparatus for an optical signal according to an embodiment of the present invention.
  • FIG. 23 is a structural block diagram (5) of a power control apparatus for an optical signal according to an embodiment of the present invention.
  • Figure 24 is a block diagram (6) of the structure of a power control apparatus for an optical signal according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a power control method for an optical signal according to an embodiment of the present invention. As shown in FIG. 1, the flow includes the following steps:
  • Step S102 acquiring different times when the uplink optical signal of each optical network unit ONU reaches the optical signal amplifier or the adjustable optical attenuator;
  • Step S104 Establish a correspondence between the ONU ID and a power control factor of the uplink optical signal.
  • Step S106 Perform power control on the uplink optical signal according to the different time and the corresponding relationship.
  • the application scenario of the foregoing optical signal amplifying method includes, but is not limited to, a passive optical network (PON), in which the optical network unit ONU is acquired. And establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal; and determining, according to the different time and the corresponding relationship, the uplink optical signal Power control is performed to make the uplink burst signal of the ONU amplify to the range that the OLT receiver can receive, thereby solving the equalization problem of the uplink signal amplification of the ONU of the optical network unit in the related art, and reducing the receiving power range of the OLT receiver.
  • PON passive optical network
  • the number of the optical signal amplifiers includes but is not limited to: one or more; the number of the dimmable optical attenuators includes but is not limited to: one or more.
  • the optical signal amplifier is mainly described by taking a semiconductor amplifier SOA as an example.
  • the DBA Dynamic Bandwidth Allocation, Dynamic Bandwidth Allocation
  • the SOA gain is adjusted by the DBA-based output power control module, or behind the SOA.
  • the attenuation of the Variable Optical Attenuator (VOA), or the simultaneous adjustment of the SOA gain and the VOA attenuation can amplify the ONU's uplink burst signal to the range that the OLT receiver can receive, and achieve the amplification effect.
  • the receiving power range requirement of the OLT receiver is reduced.
  • the power control factors include, but are not limited to, a gain of the optical signal amplifier and an attenuation of the tunable optical attenuator.
  • establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal includes the following steps:
  • Step S11 allocating a registration time slot, and transmitting a downlink registration signal
  • Step S12 When the ONU receives the downlink registration signal and determines that the power requirement of the registration time slot is satisfied, the registration starts and establishes a correspondence between the ONU ID and the gain of the optical signal amplifier.
  • the uplink burst signal of the ONU is further amplified to a range that the OLT receiver can receive, thereby solving the equalization problem of the uplink burst signal amplification of the ONU of the optical network unit in the related art, and the OLT receiver is reduced.
  • the technical effect of the required power range is required.
  • establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal includes the following steps:
  • Step S13 allocating a registration time slot, and transmitting a downlink registration signal, where the downlink registration signal includes gain information of the optical signal amplifier;
  • Step S14 when the ONU receives the downlink registration signal and determines that it is in the optical signal amplifier gain minimum registration time slot, increase the optical signal amplifier gain until the serial number sent by the ONU is correctly received;
  • step S15 a correspondence between the ONU ID and the gain of the optical signal amplifier is established.
  • establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal includes the following steps:
  • Step S21 allocating a registration time slot, and transmitting a downlink registration signal, wherein the registration time slot is pre-assigned an attenuation value
  • Step S22 When the ONU receives the downlink registration signal and determines that the power requirement of the registration time slot is met, the registration starts and the attenuation relationship between the ONU ID and the tunable optical attenuator is established.
  • the uplink burst signal of the ONU is further amplified to a range that the OLT receiver can receive, thereby solving the equalization problem of the uplink burst signal amplification of the ONU of the optical network unit in the related art, and the OLT receiver is reduced.
  • the technical effect of the required power range is required.
  • establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal includes the following steps:
  • Step S23 setting the attenuation of the tunable optical attenuator to a maximum
  • Step S24 allocating a registration time slot, and transmitting a downlink registration signal, where the downlink registration signal includes attenuation information of the tunable optical attenuator;
  • Step S25 when the ONU receives the downlink registration signal and determines that the optical signal amplifier is actually in the minimum registration time slot, the attenuation of the tunable optical attenuator is reduced until the sequence number sent by the ONU is correctly received;
  • Step S26 establishing an attenuation relationship between the ONU ID and the tunable optical attenuator.
  • establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal includes the following step:
  • Step S31 allocating a registration time slot, and transmitting a downlink registration signal, wherein the registration time slot optical signal amplifier is provided with a pre-allocated gain, and the tunable optical attenuator is provided with a pre-assigned attenuation;
  • Step S32 when the ONU receives the downlink registration signal and determines that the power requirement of the registration time slot is met, the registration starts and the correspondence between the ONU ID, the optical signal amplifier gain, and the tunable optical attenuator attenuation is established.
  • the uplink burst signal of the ONU is further amplified to a range that the OLT receiver can receive, thereby solving the equalization problem of the uplink burst signal amplification of the optical network unit ONU in the related art, and the OLT receiver is reduced.
  • the technical effect of the required power range is required.
  • establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal includes the following steps:
  • Step S33 setting the actual gain of the optical signal amplifier to be minimum
  • Step S34 allocating a registration time slot, and transmitting a downlink registration signal, where the downlink registration signal includes actual gain information of the optical signal amplifier;
  • Step S35 when the ONU receives the downlink registration signal and determines that the optical signal amplifier is actually in the minimum registration time slot, the optical signal amplifier gain is increased until the serial number sent by the ONU is correctly received.
  • Step S36 establishing a correspondence between the ONU ID, the optical signal amplifier gain, and the tunable optical attenuator attenuation.
  • the number of the optical signal amplifier or the dimming optical attenuator is multiple.
  • the correspondence relationship is multiple, wherein the multiple correspondences are respectively the power control factors of each ONU ID and the corresponding uplink optical signal. The relationship between.
  • the upstream optical signal is subjected to corresponding power control via the common optical signal amplifier before the upstream optical signal reaches the plurality of optical signal amplifiers and/or the tunable optical attenuator.
  • the alternative embodiment is divided into two steps.
  • the first step is to establish a relationship between the ONU ID and the SOA gain in the registration phase.
  • the second step is to contact the DBA according to the obtained relationship, and establish a dynamic gain adjustment table.
  • the output power control module based on the DBA dynamically adjusts the SOA gain according to the table, so that the power of the optical signal emitted by each ONU can be amplified, and the amplified The optical power tends to be consistent.
  • the first step is the correspondence between the ONU ID and the SOA gain.
  • the gain of the appropriate SOA corresponding to each ONU upstream optical signal cannot be determined.
  • the dynamic range of the ODN is 15 dB
  • the ONU transmitting optical power fluctuation range is 5 dB, so the optical power difference reaching the OLT receiver can be up to 20 dB. If the SOA gain setting is too small, those ONUs whose signals are attenuated to the OLT cannot be registered, but if the SOA gain is too large, the ONU optical power amplification of those signals to the OLT with less attenuation may be too large, and the optical receiver of the OLT may be damaged. .
  • a suitable method is needed to enable the OLT to correctly receive the uplink burst information of the ONU through the appropriate gain, record the ONU ID and the SOA gain value at this time, and establish a relationship between the two.
  • the following two ONU registration methods are available:
  • FIG. 3 is a system block diagram of the ONU registration.
  • the OLT includes a medium access layer (MAC), a DBA module, and a light emitting module Tx, which can measure the optical power of the optical receiving module Rx, and filter out the spontaneous amplification of the SOA amplification.
  • Amplified Spontaneous Emission (ASE) noise filter can measure the optical power of the optical receiving module Rx, and filter out the spontaneous amplification of the SOA amplification.
  • Amplified Spontaneous Emission (ASE) noise filter can measure the optical power of the optical receiving module Rx, and filter out the spontaneous amplification of the SOA amplification.
  • Amplified Spontaneous Emission (ASE) noise filter ASE
  • SOA spontaneous amplification of the SOA amplification.
  • the DBA-based output power control module can be composed of a memory, a controller and a driver.
  • the memory is used to store a dynamic gain adjustment table, and the controller controls the driver to
  • the first type of ONU registration as shown in Figure 3, the OLT segment allocates registration slots, and each slot SOA has a pre-assigned gain. This pre-allocated gain is based on the power range that may be incident on the SOA and the OLT receiver receives light. Power range setting. For example, if the dynamic range of the system is 20 dB, the optical power range of the incident SOA is [-40 dBm, -20 dBm], and the receiving power range of the OLT receiver is [-28 dBm, -8 dBm], then two registration slots can be allocated in segments.
  • the SOA pre-allocated gain values corresponding to each registration time slot are 10dB and 15dB, respectively, so that the ONU corresponding to the incident SOA power [-40dBm, -30dBm] can be registered in the time slot with the SOA gain of 15dB, and the incident SOA power is [ The corresponding ONU of -30dBm, -20dBm] can be registered in a time slot with a SOA gain of 10dB.
  • the OLT allocates a gain to the SOA through the DBA-based output power control module and transmits a downlink signal, which includes the transmitted optical power information of the OLT, and notifies the ONU that meets the requirements to send an uplink signal, which meets the requirements.
  • the ONU is the value of the ONU transmit power minus the uplink attenuation, that is, the power value of the incident SOA, within the power range specified by this time slot.
  • the ONU knows the transmitted optical power of the OLT, and the ONU calculates the uplink attenuation according to the received downlink optical signal power, and the uplink attenuation is the OLT transmitted optical power minus the downlink optical signal power value received by the ONU, and then the ONU Determining whether the optical power of the uplink SOA meets the power requirement of the allocated time slot according to the value of the transmitted optical power of the transmitter minus the value of the uplink attenuation, and if not, waits for the next allocated time slot, and vice versa.
  • the ONU serial number is sent upstream to start registration.
  • the uplink signal is amplified by the pre-allocated gain SOA and then filtered by the filter to filter the ASE noise.
  • the receiver receives the filtered signal, measures the optical power, and converts the optical signal into an electrical signal.
  • the OLT records the gain value of the SOA and the ID of the ONU at this time, completes the registration, and establishes the relationship between the ONU ID and the SOA gain.
  • the flow chart is shown in Figure 4.
  • the second registration mode the OLT uses the DBA-based output power control module to give the SOA a minimum gain, for example, 5 dB, and then the OLT allocates a registration time slot, and transmits a registration signal downstream, the signal including the gain value of the SOA at this time.
  • the ONU determines whether it is in the registration slot when the SOA gain is minimum, and if so, transmits the sequence number information uplink, and if not, waits for the registration slot when the SOA gain is minimum.
  • the upstream optical signal is amplified by the SOA, and the ASE filter is filtered and received by the OLT receiver.
  • the OLT receives the correct value, the ONU ID and the SOA gain value are recorded, and the ONU ID and the SOA gain relationship are established. If the OLT cannot receive the correct value. Then, the OLT increases the SOA gain by a fixed value, for example, 5 dB, and repeats the above steps again. After the SOA gain is increased to a certain value, the OLT can correctly receive the ONU uplink signal. At this time, write down the ONU ID and the SOA gain, establish the ONU ID and SOA gain relationship, and complete the registration.
  • the flow chart is shown in Figure 5.
  • the OLT calculates the dynamic gain adjustment table according to the DBA and the link delay, and calculates the dynamic gain adjustment table according to the relationship between the ONU ID and the SOA gain obtained by the registration process, as shown in Table 2, dynamically
  • the DBA-based output power control module is used to adjust the SOA gain value such that each ONU burst optical signal power tends to be uniform.
  • the OLT can fine-tune the SOA gain according to the received ONU optical power, so that the uplink optical power is amplified by the SOA to reach the optimal receiving power of the OLT receiver, for example, -18 dBm, and then the ONU ID is recorded at this time.
  • the SOA gain so that each ONU has a one-to-one SOA gain, so that each ONU's upstream optical signal can be amplified to a consistent OLT optimal received power.
  • the gain equalization amplification module of FIG. 6 is composed of FIG.
  • the burst optical signals of different ONUs are amplified by the gain equalization amplification module, and the optical power is adjusted to the optimal receiving power of the OLT receiver to improve the power budget.
  • the dynamic bandwidth range requirements of the OLT receiver are greatly reduced.
  • the value of the VOA behind the SOA is dynamically adjusted according to the DBA.
  • the optional embodiment 2 is similar to the alternative embodiment 1. The difference is that the OLT receiver receiving power is adjusted by adjusting the attenuation.
  • the DBA-based output power control module can be composed of a memory, a controller and a stepper motor, and the stepper motor adjusts the VOA attenuation.
  • the first step is to establish the ONU ID and VOA attenuation relationship.
  • the first type of ONU registration As shown in Figure 7, the SOA operates at a fixed gain, the OLT segment allocates a registered time slot, and each time slot VOA has a pre-assigned attenuation. This pre-allocated attenuation is based on possible exposure to the SOA.
  • Power range and OLT receiver receive optical power range settings. For example, suppose the system dynamic range is 20dB, SOA works at 20dB fixed gain, the optical power range of incident SOA is [-40dBm, -20dBm], and the OLT receiver receives power range [-28dBm, -8dBm], then it can be segmented.
  • Two registration time slots are allocated, and the VOA pre-allocation attenuation values corresponding to each registration time slot are 10 dB and 5 dB, respectively, so that the ONU corresponding to the incident SOA power [-40 dBm, -30 dBm] can be attenuated to 5 dB in the VOA.
  • Registered, an ONU with an incident SOA power of [-30dBm, -20dBm] can be registered in a time slot with a VOA attenuation of 10dB.
  • the OLT allocates an attenuation to the VOA through the DBA-based output power control module and sends a downlink signal, which signals the ONU that meets the requirements to send an uplink signal, and the eligible ONU is the ONU transmit power minus the uplink.
  • the value after the link is attenuated, that is, the power value of the incident SOA, is within the power range specified by this time slot.
  • the ONU knows the transmitted optical power of the OLT, and the ONU calculates the uplink attenuation according to the received downlink optical signal power, and the uplink attenuation is the OLT transmitted optical power minus the downlink optical signal power value received by the ONU, and then the ONU Determining whether the optical power of the uplink SOA meets the power requirement of the allocated time slot according to the value of the transmitted optical power of the transmitter minus the value of the uplink attenuation, and if not, waits for the next allocated time slot, and vice versa. If it matches, the ONU serial number is sent upstream to start registration.
  • the uplink signal is amplified by SOA of fixed gain and then attenuated by VOA, and then filtered by filter to filter ASE noise.
  • the receiver receives the filtered signal, measures its optical power, and converts the optical signal into The electrical signal is passed to the MAC.
  • the OLT records the attenuation value of the VOA and the ID of the ONU at this time, completes the registration, and establishes the ONU ID and VOA attenuation relationship.
  • the flow chart is shown in Figure 8.
  • the established ONU ID and VOA attenuation form are shown in Table 3.
  • the second registration mode the OLT sends a maximum attenuation to the VOA through the DBA-based output power control module, for example, 10 dB, and then the OLT allocates a registration time slot, and sends a registration signal downstream, the signal including the actual gain value of the SOA at this time (Formula 1) .
  • the ONU determines whether it is in the registration time slot when the actual gain of the SOA is the smallest, and if so, transmits the sequence number information in the uplink, and if not, waits for the registration time slot when the actual gain of the SOA is the smallest.
  • the upstream optical signal is amplified by SOA, VOA is attenuated, and the ASE filter is filtered and received by the OLT receiver. If the OLT receives correctly, the ONU ID and the VOA attenuation value are recorded, and the ONU ID and VOA attenuation relationship are established. If it is not received correctly, the OLT reduces the VOA attenuation by a fixed value, for example 5 dB, and repeats the above steps again. After the VOA attenuation is reduced to a certain value, the OLT can correctly receive the ONU uplink signal. At this time, write down the ONU ID and VOA attenuation, establish the ONU ID and VOA attenuation relationship, and complete the registration.
  • the flow chart is shown in Figure 9.
  • the OLT calculates the time when each ONU optical signal arrives at the VOA according to the DBA and the link delay, and establishes a dynamic gain adjustment table according to the ONU ID and the VOA attenuation relationship obtained by the registration process, as shown in Table 4, dynamically
  • the DBA-based output power control module is used to adjust the attenuation value of the VOA so that the power of each ONU burst optical signal tends to be uniform.
  • the OLT may fine-tune the VOA attenuation according to the received ONU optical power, so that the uplink optical power is subjected to SOA amplification and VOA attenuation to reach the optimal receiving power of the OLT receiver, for example, -18 dBm, and then record this.
  • the ONU ID and VOA are attenuated so that each ONU has a one-to-one VOA attenuation, so that each ONU's upstream optical signal can be amplified to a consistent OLT optimal received power.
  • the difference is that the OLT receiver receiving power is adjusted by simultaneously adjusting the SOA gain and the VOA attenuation. This has the advantage of reducing the regulatory range requirements of SOA and VOA.
  • the DBA-based output power control module can be composed of a memory, a controller, a driver and a stepper motor.
  • the driver adjusts the SOA gain and the stepper motor adjusts the VOA attenuation.
  • the first step is to establish the relationship between the ONU ID and the SOA gain and VOA attenuation.
  • the first type of ONU registration the OLT segment allocates registration slots, each slot SOA has a pre-allocated gain, and the VOA has a pre-assigned attenuation. The difference between these two values is collectively referred to as the SOA actual gain.
  • This pre-allocated actual gain is set according to the power range that may be incident on the SOA and the range of received optical power of the OLT receiver. For example, if the dynamic range of the system is 20 dB, the optical power range of the incident SOA is [-40 dBm, -20 dBm], and the receiving power range of the OLT receiver is [-28 dBm, -8 dBm], then two registration slots can be allocated in segments.
  • the actual gain value of the SOA pre-allocation corresponding to each registration time slot is 10dB and 15dB respectively.
  • the SOA gain can be 15dB
  • the VOA attenuation can be 5dB
  • the actual gain value is 15dB
  • the SOA gain can be 17dB
  • the VOA attenuation can be 2dB, so the original adjustment of SOA or VOA requires a 5dB adjustment range, while adjusting SOA and VOA can narrow the range to 2dB and 3dB.
  • An ONU with an incident SOA power of [-40dBm, -30dBm] can be registered in a time slot with an actual SOA gain of 5dB.
  • An ONU with an incident SOA power of [-30dBm, -20dBm] can be used in a time slot with an actual SOA of 10dB. registered.
  • the OLT allocates a gain to the SOA through the DBA-based output power control module, and the VOA attenuates and transmits a downlink signal, which signals the ONU that meets the requirements to send an uplink signal, and the eligible ONU transmits the ONU.
  • the power minus the value after the uplink attenuation, that is, the power value of the incident SOA is within the power range specified by this time slot.
  • the ONU knows the transmitted optical power of the OLT, and the ONU calculates the uplink attenuation according to the received downlink optical signal power, and the uplink attenuation is the OLT transmitted optical power minus the downlink optical signal power value received by the ONU, and then the ONU Determining whether the optical power of the uplink SOA meets the power requirement of the allocated time slot according to the value of the transmitted optical power of the transmitter minus the value of the uplink attenuation, and if not, waits for the next allocated time slot, and vice versa. If the match is met, the ONU serial number is sent upstream to start registration.
  • the uplink signal is amplified by SOA and then attenuated by VOA, and then filtered to filter ASE noise.
  • the receiver receives the filtered signal, measures its optical power, and converts the optical signal into electrical signal transmission. Give the MAC.
  • the OLT records the SOA gain value, the VOA attenuation value, and the ONU ID at this time, completes the registration, and establishes the ONU ID and SOA gain and VOA attenuation relationship.
  • the flow chart is shown in Figure 10.
  • the established ONU ID and SOA gain and VOA attenuation form are shown in Table 5.
  • the second registration method the OLT uses the DBA-based output power control module to give the SOA an actual minimum gain, such as 5 dB.
  • the actual gain can be 10 dB for the SOA gain and 5 dB for the VOA.
  • the OLT then allocates a registration time slot and transmits a registration signal downstream, the signal containing the actual gain value of the SOA at this time (Equation 2).
  • the ONU determines whether it is in the registration time slot when the actual gain of the SOA is the smallest, and if so, transmits the sequence number information in the uplink, and if not, waits for the registration time slot when the actual gain of the SOA is the smallest.
  • the upstream optical signal is amplified by SOA, VOA is attenuated, and the ASE filter is filtered and received by the OLT receiver. If the OLT receives correctly, the ONU ID and the SOA gain value and the VOA attenuation value are recorded, and the ONU ID and SOA are established. Gain and VOA attenuation relationship, if the OLT fails to receive correctly, the OLT increases the actual gain of the SOA by a fixed value, such as 5 dB, for example, by increasing the SOA gain to 13 dB and reducing the VOA attenuation to 3 dB. Then repeat the above steps again. After the actual gain of the SOA increases to a certain value, the OLT can correctly receive the ONU uplink signal. At this time, the ONU ID and the SOA gain and the VOA attenuation are recorded, and the ONU ID and the SOA gain and the VOA attenuation relationship are established, and registration is completed.
  • the flow chart is shown in Figure 11.
  • the OLT calculates the time when each ONU optical signal arrives at the SOA according to the DBA and the link delay, and establishes a dynamic gain adjustment table according to the ONU ID and the SOA gain and the VOA attenuation relationship obtained by the registration process, as shown in Table 6. Dynamically use the DBA-based output power control module SOA gain and the attenuation value of the VOA so that the power of each ONU burst optical signal tends to be uniform.
  • the OLT can fine-tune the SOA gain and the VOA attenuation according to the received ONU optical power, so that the uplink optical power is subjected to SOA amplification and VOA attenuation to reach the optimal receiving power of the OLT receiver, for example, -18 dBm, and then Make note of the ONU ID and SOA gain and VOA attenuation at this time, so that each ONU has a one-to-one SOA gain and VOA attenuation, so that each ONU's upstream optical signal can be amplified to a consistent OLT optimal received power. .
  • a multi-channel amplification architecture and an amplification output power equalization method for each channel based on the architecture are also proposed, and such an OLT.
  • the power balancing problem of each channel is solved by the optional embodiment, and the problem that the SOA gain cannot be selected by different SOA powers caused by different channels sharing different SOAs is also solved.
  • the uplink signal line is amplified by the first step through the SOA, and then divided into four channels with no wavelength through the WDM.
  • Each signal is amplified by SOA, and the filter filters the ASE noise.
  • the tunable optical attenuator (VOA) After attenuation, enter the receiver at the appropriate power.
  • the power control module adjusts the SOA gain or VOA attenuation through dynamic bandwidth allocation (DBA), or both, so that the bursts of different ONUs of each signal are amplified, and the power entering the receiver is within the working range of the receiver.
  • DBA dynamic bandwidth allocation
  • each ONU ID corresponds to the corresponding SOA gain (VOA attenuation) in the first step.
  • the SOA gain (VOA attenuation) is adjusted in real time, so that the incident receiver optical power is within the working range of the receiver.
  • the implementation of the present embodiment is similar to that of the foregoing optional embodiment 1, the optional embodiment 2, the optional embodiment 3, and the optional embodiment 4.
  • the difference is that the SOA and the VOA may be multiple in this embodiment.
  • the registration phase the relationship between each ONU ID and the corresponding SOA gain is established.
  • the multi-path SOA gain VOA attenuation
  • FIG. 13 is a schematic structural diagram of dynamically adjusting each SOA gain after WDM according to the DBA.
  • the architecture is divided into two steps. The first step is to establish the relationship between each ONU ID and the corresponding SOA gain in the registration phase. .
  • the second step is to contact the DBA according to the obtained relationship, and establish a dynamic gain adjustment table.
  • the output power control module based on the DBA dynamically adjusts the SOA gain according to the table, so that the power of the optical signal emitted by each ONU can be amplified, and the amplified The optical power is within the receiver's operating range.
  • the gain of the appropriate SOA corresponding to each ONU upstream optical signal cannot be determined.
  • the dynamic range of the ODN is 15 dB
  • the ONU transmitting optical power fluctuation range is 5 dB, so the optical power difference reaching the OLT receiver can be up to 20 dB. If the SOA gain setting is too small, those ONUs whose signals are attenuated to the OLT cannot be registered, but if the SOA gain is too large, the ONU optical power amplification of those signals to the OLT with less attenuation may be too large, and the optical receiver of the OLT may be damaged. .
  • a suitable method is needed to enable the OLT to correctly receive the uplink burst information of the ONU through the appropriate gain, record the ONU ID and the SOA gain value at this time, and establish a relationship between the two.
  • the following two ONU registration methods are available:
  • the first type of ONU registration for each signal, the OLT segment allocates a registration time slot, and each time slot has a pre-assigned gain for each SOA. This pre-allocated gain is received according to the power range that may be incident on the SOA and the OLT.
  • the machine receives the optical power range setting. For example, if the dynamic range of the system is 20 dB, the optical power range of the incident SOA is [-40 dBm, -20 dBm], and the receiving power range of the OLT receiver is [-28 dBm, -8 dBm], then two registration slots can be allocated in segments.
  • the SOA pre-allocated gain values corresponding to each registration time slot are 10dB and 15dB, respectively, so that the ONU corresponding to the incident SOA power [-40dBm, -30dBm] can be registered in the time slot with the SOA gain of 15dB, and the incident SOA power is [ The corresponding ONU of -30dBm, -20dBm] can be registered in a time slot with a SOA gain of 10dB.
  • the OLT allocates a gain to the SOA through the DBA-based output power control module and transmits a downlink signal, which includes an OLT downlink transmission power information, and notifies the ONU that meets the requirement to send an uplink signal.
  • the eligible ONU is the value of the ONU transmit power minus the uplink attenuation, that is, the power value of the incident SOA, within the power range specified by this time slot.
  • the ONU obtains the transmitted optical power of the OLT through the downlink signal, and the ONU calculates the uplink attenuation according to the received downlink optical signal power, where the uplink attenuation is the OLT transmitted optical power minus the downlink optical signal power value received by the ONU. Then, the ONU determines whether the optical power of the uplink SOA meets the power requirement of the allocated time slot according to the value of the uplink optical attenuation of the transmitter, and if not, waits for the next allocated time slot. If it is met, the ONU serial number is sent upstream to start registration, and the uplink signal is amplified by the pre-allocated gain SOA and then filtered by the filter to filter the ASE noise.
  • the receiver receives the filtered signal and measures its optical power.
  • the OLT records the gain value of the SOA and the ID of the ONU at this time, completes the registration, and establishes the relationship between the ONU ID and the SOA gain.
  • the registration process 4 channels can be performed simultaneously, and the single channel flow chart is shown in Figure 4.
  • the second registration mode the OLT uses the DBA-based output power control module to give the SOA a minimum gain, for example, 5 dB, and then the OLT allocates a registration time slot, and transmits a registration signal downstream, the signal including the gain value of the SOA at this time.
  • the ONU After receiving the registration signal, the ONU determines whether it is in the registration slot when the SOA gain is minimum, and if so, transmits the sequence number information uplink, and if not, waits for the registration slot when the SOA gain is minimum.
  • the upstream optical signal is amplified by the SOA, and the ASE filter is filtered and received by the OLT receiver. If the OLT receives the correct value, the ONU ID and the SOA gain value are recorded, and the ONU ID and the SOA gain relationship are established. If the OLT cannot receive the correct value. Then, the OLT increases the SOA gain by a fixed value, for example, 5 dB, and repeats the above steps again. After the SOA gain is increased to a certain value, the OLT can correctly receive the ONU uplink signal. At this time, write down the ONU ID and the SOA gain, establish the ONU ID and SOA gain relationship, and complete the registration. Registration of 4 channels can be performed simultaneously. A single channel flow chart is shown in Figure 5.
  • the OLT calculates the dynamic gain adjustment table according to the DBA and the link delay, and calculates the dynamic gain adjustment table according to the relationship between the ONU ID and the SOA gain obtained by the registration process, as shown in Table 8, and dynamically uses the basis.
  • the DBA's output power control module adjusts the SOA gain value for each channel such that each ONU burst optical signal power is within the receiver's operating range.
  • the OLT can fine-tune the SOA gain according to the received ONU optical power, so that the uplink optical power is amplified by the SOA to reach the optimal receiving power of the OLT receiver, for example, -18 dBm, and then the ONU ID is recorded at this time.
  • the SOA gain so that each ONU has a one-to-one SOA gain, so that each ONU's upstream optical signal can be amplified to a consistent OLT optimal received power.
  • each SOA actual gain each SOA fixed gain - each VOA attenuation (Equation 1)
  • the DBA-based output power control module can be composed of a memory, a controller and a driver that adjusts the VOA attenuation.
  • the first step is to establish the ONU ID and VOA attenuation relationship.
  • the first type of ONU registration SOA works at fixed gain, OLT segment allocates registration slots, and each time slot VOA has a pre-assigned attenuation. This pre-allocated attenuation is based on the power range that may be incident on the SOA and the OLT receiver. Receive optical power range setting.
  • the optical power range of incident SOA is [-40dBm, -20dBm]
  • the OLT receiver receives power range [-28dBm, -8dBm]
  • the VOA pre-allocation attenuation values corresponding to each registration time slot are 10 dB and 5 dB, respectively, so that the ONU corresponding to the incident SOA power [-40 dBm, -30 dBm] can be attenuated to 5 dB in the VOA.
  • an ONU with an incident SOA power of [-30dBm, -20dBm] can be registered in a time slot with a VOA attenuation of 10dB.
  • the OLT allocates an attenuation to the VOA through the DBA-based output power control module and transmits a downlink signal, which includes the transmission power information of the OLT and notifies the eligible ONU to send the uplink signal.
  • the eligible ONU is the value of the ONU transmit power minus the uplink attenuation, that is, the power value of the incident SOA, within the power range specified by this time slot.
  • the ONU knows the transmitted optical power of the OLT, and the ONU calculates the uplink attenuation according to the received downlink optical signal power, and the uplink attenuation is the OLT transmitted optical power minus the downlink optical signal power value received by the ONU, and then the ONU Determining whether the optical power of the uplink SOA meets the power requirement of the allocated time slot according to the value of the transmitted optical power of the transmitter minus the value of the uplink attenuation, and if not, waits for the next allocated time slot, and vice versa.
  • the uplink signal is amplified by SOA with fixed gain, and then filtered by the filter to filter the ASE noise and then decayed by VOA.
  • the receiver receives the signal, measures its optical power, and converts the optical signal into electrical signal transmission. Give the MAC.
  • the OLT records the attenuation value of the VOA and the ID of the ONU at this time, completes the registration, and establishes the ONU ID and VOA attenuation relationship.
  • the four channel registration process can be performed simultaneously.
  • a single channel flow chart is shown in Figure 8.
  • the established ONU ID and VOA attenuation form are shown in Table 9.
  • the second registration mode the OLT sends a maximum attenuation to the VOA through the DBA-based output power control module, for example, 10 dB, and then the OLT allocates a registration time slot, and sends a registration signal downstream, the signal including the actual gain value of the SOA at this time (Formula 1) .
  • the ONU After receiving the registration signal, the ONU determines whether it is in the registration time slot when the actual gain of the SOA is the smallest, and if so, transmits the sequence number information in the uplink, and if not, waits for the registration time slot when the actual gain of the SOA is the smallest.
  • the upstream optical signal is amplified by SOA, filtered by ASE filter, and received by the OLT receiver after VOA attenuation. If the OLT receives correctly, the ONU ID and VOA attenuation values are recorded, and the ONU ID and VOA attenuation relationship are established. If it is not received correctly, the OLT reduces the VOA attenuation by a fixed value, for example 5 dB, and repeats the above steps again. After the VOA attenuation is reduced to a certain value, the OLT can correctly receive the ONU uplink signal. At this time, write down the ONU ID and VOA attenuation, establish the ONU ID and VOA attenuation relationship, and complete the registration. Four channel registrations can be performed simultaneously. A single channel flow chart is shown in Figure 9.
  • the OLT calculates the time when each ONU optical signal arrives at the VOA according to the DBA and the link delay, and establishes a dynamic gain adjustment table according to the ONU ID and the VOA attenuation relationship obtained by the registration process, as shown in Table 10, and dynamically uses the basis.
  • the DBA's output power control module adjusts the attenuation value of the VOA so that the power of each ONU burst optical signal tends to be uniform.
  • the OLT may fine-tune the VOA attenuation according to the received ONU optical power, so that the uplink optical power is subjected to SOA amplification and VOA attenuation to reach the optimal receiving power of the OLT receiver, for example, -18 dBm, and then record this.
  • the ONU ID and VOA are attenuated so that each ONU has a one-to-one VOA attenuation, so that each ONU's upstream optical signal can be amplified to a consistent OLT optimal received power.
  • the DBA-based output power control module can be composed of a memory, a controller, and a driver that adjusts the SOA gain and VOA attenuation.
  • the first step is to establish the relationship between the ONU ID and the SOA gain and VOA attenuation.
  • the first type of ONU registration the OLT segment allocates registration slots, each slot SOA has a pre-allocated gain, and the VOA has a pre-assigned attenuation. The difference between these two values is collectively referred to as the SOA actual gain.
  • This pre-allocated actual gain is set according to the power range that may be incident on the SOA and the range of received optical power of the OLT receiver. For example, if the dynamic range of the system is 20 dB, the optical power range of the incident SOA is [-40 dBm, -20 dBm], and the receiving power range of the OLT receiver is [-28 dBm, -8 dBm], then two registration slots can be allocated in segments.
  • the actual gain value of the SOA pre-allocation corresponding to each registration time slot is 10dB and 15dB respectively.
  • the SOA gain can be 15dB
  • the VOA attenuation can be 5dB
  • the actual gain value is 15dB
  • the SOA gain can be 17dB
  • the VOA attenuation can be 2dB, so the original adjustment of SOA or VOA requires a 5dB adjustment range, while adjusting SOA and VOA can narrow the range to 2dB and 3dB.
  • An ONU with an incident SOA power of [-40dBm, -30dBm] can be registered in a time slot with an actual SOA gain of 5dB.
  • An ONU with an incident SOA power of [-30dBm, -20dBm] can be used in a time slot with an actual SOA of 10dB. registered.
  • the OLT allocates a gain to the SOA through the DBA-based output power control module.
  • the VOA attenuates and transmits a downlink signal, which includes the transmit power information of the OLT and notifies the ONU that meets the requirements to send the uplink signal.
  • the eligible ONU is the value of the ONU transmit power minus the uplink attenuation, that is, the power value of the incident SOA, within the power range specified by this time slot.
  • the ONU knows the transmitted optical power of the OLT, and the ONU calculates the uplink attenuation according to the received downlink optical signal power, and the uplink attenuation is the OLT transmitted optical power minus the downlink optical signal power value received by the ONU, and then the ONU Determining whether the optical power of the uplink SOA meets the power requirement of the allocated time slot according to the value of the transmitted optical power of the transmitter minus the value of the uplink attenuation, and if not, waits for the next allocated time slot, and vice versa.
  • the ONU serial number is sent upstream to start registration.
  • the uplink signal is amplified by SOA and filtered by the filter, the ASE noise is attenuated by the VOA.
  • the receiver receives the filtered signal, measures the optical power, and converts the optical signal into an electrical signal. Give the MAC.
  • the OLT records the SOA gain value, the VOA attenuation value, and the ONU ID at this time, completes the registration, and establishes the ONU ID and SOA gain and VOA attenuation relationship. 4 channels can be registered at the same time.
  • a single channel registration flow chart is shown in Figure 10.
  • the established ONU ID and SOA gain and VOA attenuation form are shown in Table 11.
  • the second registration method the OLT uses the DBA-based output power control module to give the SOA an actual minimum gain, such as 5 dB.
  • the actual gain can be 10 dB for the SOA gain and 5 dB for the VOA.
  • the OLT then allocates a registration time slot and transmits a registration signal downstream, the signal containing the actual gain value of the SOA at this time (Equation 2).
  • the ONU determines whether it is in the registration time slot when the actual gain of the SOA is the smallest, and if so, transmits the sequence number information in the uplink, and if not, waits for the registration time slot when the actual gain of the SOA is the smallest.
  • the upstream optical signal is amplified by SOA, filtered by ASE filter, and received by the OLT receiver after VOA attenuation. If the OLT receives correctly, record the ONU ID and the SOA gain value and the VOA attenuation value at this time, and establish an ONU ID and SOA. Gain and VOA attenuation relationship, if the OLT fails to receive correctly, the OLT increases the actual gain of the SOA by a fixed value, such as 5 dB, for example, by increasing the SOA gain to 13 dB and reducing the VOA attenuation to 3 dB. Then repeat the above steps again.
  • a fixed value such as 5 dB
  • the OLT can correctly receive the ONU uplink signal.
  • the ONU ID and the SOA gain and the VOA attenuation are recorded, and the ONU ID and the SOA gain and the VOA attenuation relationship are established, and registration is completed.
  • the flow chart is shown in Figure 11.
  • the OLT calculates the time when each ONU optical signal arrives at the SOA according to the DBA and the link delay, and establishes a dynamic gain adjustment table according to the ONU ID and the SOA gain and the VOA attenuation relationship obtained by the registration process, as shown in Table 12,
  • the DBA-based output power control module SOA gain and VOA attenuation values are used such that each ONU burst optical signal power tends to be uniform.
  • the OLT can fine-tune the SOA gain and the VOA attenuation according to the received ONU optical power, so that the uplink optical power is subjected to SOA amplification and VOA attenuation to reach the optimal receiving power of the OLT receiver, for example, -18 dBm, and then Make note of the ONU ID and SOA gain and VOA attenuation at this time, so that each ONU has a one-to-one SOA gain and VOA attenuation, so that each ONU's upstream optical signal can be amplified to a consistent OLT optimal received power. .
  • the DBA-based output power control module can be composed of a memory, a controller and a driver that adjusts the VOA attenuation.
  • the first step is to establish the ONU ID and VOA attenuation relationship.
  • the shared SOA works at a fixed gain.
  • the OLT segment allocates a registration time slot, and each time slot VOA has a pre-assigned attenuation. This pre-allocated attenuation is based on possible incidents to the SOA.
  • Power range and OLT receiver receive optical power range settings.
  • the system dynamic range is assumed to be 20 dB
  • the shared SOA operates at a fixed gain of 20 dB
  • the optical power range of the incident SOA is [-40 dBm, -20 dBm]
  • the received power range of the OLT receiver is [-28 dBm, -8 dBm].
  • two registration time slots can be allocated in stages, and the VOA pre-allocation attenuation values corresponding to each registration time slot are 10 dB and 5 dB, respectively, so that the ONU corresponding to the incident SOA power [-40 dBm, -30 dBm] can be attenuated in the VOA.
  • an ONU with an incident SOA power of [-30 dBm, -20 dBm] can be registered in a time slot with a VOA attenuation of 10 dB.
  • the SOA can fix the gain because the VOA is separately adjusted on each channel.
  • the OLT allocates an attenuation to the VOA through the DBA-based output power control module and transmits a downlink signal, which includes the transmission power information of the OLT and notifies the ONU that meets the requirement to send the uplink signal.
  • the eligible ONU is the value of the ONU transmit power minus the uplink attenuation, that is, the power value of the incident SOA, within the power range specified by this time slot.
  • the ONU knows the transmitted optical power of the OLT, and the ONU calculates the uplink attenuation according to the received downlink optical signal power, and the uplink attenuation is the OLT transmitted optical power minus the downlink optical signal power value received by the ONU, and then the ONU Determining whether the optical power of the uplink SOA meets the power requirement of the allocated time slot according to the value of the transmitted optical power of the transmitter minus the value of the uplink attenuation, and if not, waits for the next allocated time slot, and vice versa.
  • the uplink signal is amplified by SOA with fixed gain, and then filtered by the filter to filter the ASE noise and then decayed by VOA.
  • the receiver receives the signal, measures its optical power, and converts the optical signal into electrical signal transmission. Give the MAC.
  • the OLT records the attenuation value of the VOA and the ID of the ONU at this time, completes the registration, and establishes the ONU ID and VOA attenuation relationship.
  • the four channel registration process can be performed simultaneously.
  • a single channel flow chart is shown in Figure 8.
  • the established ONU ID and VOA attenuation form are shown in Table 13.
  • the second registration mode the OLT uses the DBA-based output power control module to give the VOA a maximum attenuation, for example, 10 dB, and then the OLT allocates a registration time slot, and sends a registration signal downstream, the signal including the actual gain value of the SOA at this time (Equation 3) .
  • the ONU After receiving the registration signal, the ONU determines whether it is in the registration time slot when the actual gain of the SOA is the smallest, and if so, transmits the sequence number information in the uplink, and if not, waits for the registration time slot when the actual gain of the SOA is the smallest.
  • the upstream optical signal is amplified by SOA, filtered by ASE filter, and received by the OLT receiver after VOA attenuation. If the OLT receives correctly, the ONU ID and VOA attenuation values are recorded, and the ONU ID and VOA attenuation relationship are established. If it is not received correctly, the OLT reduces the VOA attenuation by a fixed value, for example 5 dB, and repeats the above steps again. After the VOA attenuation is reduced to a certain value, the OLT can correctly receive the ONU uplink signal. At this time, write down the ONU ID and VOA attenuation, establish the ONU ID and VOA attenuation relationship, and complete the registration. Four channel registrations can be performed simultaneously. A single channel flow chart is shown in Figure 9.
  • the OLT calculates the time when each ONU optical signal arrives at the VOA according to the DBA and the link delay, and establishes a dynamic gain adjustment table according to the ONU ID and the VOA attenuation relationship obtained by the registration process, as shown in Table 14, and dynamically uses the basis.
  • the DBA's output power control module adjusts the attenuation value of the VOA so that the power of each ONU burst optical signal tends to be uniform.
  • the OLT may fine-tune the VOA attenuation according to the received ONU optical power, so that the uplink optical power is subjected to SOA amplification and VOA attenuation to reach the optimal receiving power of the OLT receiver, for example, -18 dBm, and then record this.
  • the ONU ID and VOA are attenuated so that each ONU has a one-to-one VOA attenuation, so that each ONU's upstream optical signal can be amplified to a consistent OLT optimal received power.
  • the four channels are amplified by the first step of an SOA, and then each signal is amplified by the second step of the SOA, filtered, attenuated, and then received by the receiver.
  • the power control module controls each according to the DBA.
  • the path SOA gain and VOA attenuation cause the receiver to receive optical power within the receiver's operating range.
  • This example is similar to Example 3 except that the upstream signal is first amplified by a common SOA before WDM demultiplexing, followed by SOA amplification and VOA attenuation on each channel.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
  • a power control device for the optical signal is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and has not been described again.
  • the term “module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 18 is a structural block diagram of a power control apparatus for an optical signal according to an embodiment of the present invention. As shown in FIG. 18, the apparatus includes:
  • the obtaining module 182 is configured to acquire different times when the uplink optical signal of each optical network unit ONU reaches the optical signal amplifier;
  • the establishing module 184 is configured to establish a correspondence between the ONU ID and a power control factor of the uplink optical signal
  • the control module 186 is configured to perform power control on the uplink optical signal according to the different time and the corresponding relationship.
  • the application scenario of the foregoing optical signal amplifying device includes, but is not limited to, a Passive Optical Network (PON), in which the optical network unit is acquired.
  • the uplink optical signal of the ONU reaches a different time of the optical signal amplifier or the tunable optical attenuator; establishing a correspondence between the ONU ID and a power control factor of the uplink optical signal; and according to the different time and the corresponding relationship, the uplink
  • the optical signal is power-controlled, so that the uplink burst signal of the ONU is amplified to the range that the OLT receiver can receive, thereby solving the equalization problem of the uplink signal amplification of the ONU of the optical network unit in the related art, and reducing the reception of the OLT receiver.
  • the technical effect required by the power range is not limited to, a Passive Optical Network (PON), in which the optical network unit is acquired.
  • the uplink optical signal of the ONU reaches a different time of the optical signal amplifier or the t
  • the number of optical signal amplifiers includes but is limited to: one or more; the number of the dimmable optical attenuators includes but is limited to: one or more.
  • the optical signal amplifier is mainly described by taking a semiconductor amplifier SOA as an example.
  • the power control factor includes at least one of the following: a gain of the optical signal amplifier, and an attenuation of the tunable optical attenuator.
  • FIG. 19 is a structural block diagram (1) of an amplifying apparatus for an optical signal according to an embodiment of the present invention.
  • the establishing module 184 includes:
  • the first allocating unit 192 is configured to allocate a registration time slot when the power control factor is the gain of the optical signal amplifier, and send a downlink registration signal;
  • the first establishing unit 194 is configured to start registration and establish a correspondence between the ONU ID and the gain of the optical signal amplifier when the ONU receives the downlink registration signal and determines that the power requirement of the registration time slot is satisfied.
  • FIG. 20 is a structural block diagram (2) of an amplifying apparatus for an optical signal according to an embodiment of the present invention.
  • the establishing module 184 includes:
  • the second allocating unit 202 is configured to allocate a registration time slot when the power control factor is the gain of the optical signal amplifier, and send a downlink registration signal, where the downlink registration signal includes gain information of the optical signal amplifier;
  • the first adding unit 204 is configured to increase the optical signal amplifier gain until the ONU sends the serial number when the ONU receives the downlink registration signal and determines that the optical signal amplifier gain minimum registration time slot is received;
  • the second establishing unit 206 is arranged to establish a correspondence between the ONU ID and the optical signal amplifier gain.
  • the establishing module 184 includes:
  • the third allocating unit 212 is configured to allocate a registration time slot when the power control factor is the attenuation of the tunable optical attenuator, and send a downlink registration signal, wherein the registration time slot is pre-assigned an attenuation value;
  • the third establishing unit 214 is configured to start registration and establish an attenuation relationship between the ONU ID and the tunable optical attenuator when the ONU receives the downlink registration signal and determines that the power requirement of the registration time slot is met.
  • FIG 22 is a block diagram (4) of the structure of an amplifying device for an optical signal according to an embodiment of the present invention.
  • the building module 184 includes:
  • the first setting unit 222 is configured to set the attenuation of the tunable optical attenuator to be maximum when the power control factor is the attenuation of the tunable optical attenuator;
  • the fourth allocating unit 224 is configured to allocate a registration time slot, and send a downlink registration signal, where the downlink registration signal includes attenuation information of the tunable optical attenuator;
  • a reducing unit 226, configured to reduce the attenuation of the tunable optical attenuator until the serial number of the tunable optical attenuator is correctly received when the ONU receives the downlink registration signal and determines that the optical signal amplifier has the actual gain minimum registration time slot;
  • the fourth establishing unit 228 is configured to establish an attenuation relationship between the ONU ID and the tunable optical attenuator.
  • the establishing module 184 includes:
  • the fifth allocating unit 232 is configured to allocate a registration time slot when the power control factor is the gain of the optical signal amplifier and the attenuation of the tunable optical attenuator, and send a downlink registration signal, wherein the registration time slot optical signal
  • the amplifier is provided with a pre-assigned gain and the dimmable attenuator is provided with a pre-assigned attenuation;
  • the fifth establishing unit 234 is configured to start registration and establish an ONU ID, an optical signal amplifier gain, and a tunable optical attenuator attenuation when the ONU receives the downlink registration signal and determines that the power requirement of the registration time slot is met. Correspondence.
  • FIG. 24 is a structural block diagram (6) of an amplifying apparatus for an optical signal according to an embodiment of the present invention.
  • the establishing module 184 includes:
  • the second setting unit 242 is configured to set the actual gain of the optical signal amplifier to be minimum when the power control factor is the gain of the optical signal amplifier and the attenuation of the tunable optical attenuator;
  • the sixth allocating unit 244 is configured to allocate a registration time slot and send a downlink registration signal, where the downlink registration signal includes actual gain information of the optical signal amplifier;
  • the second adding unit 246 is configured to increase the optical signal amplifier gain until the ONU sends the serial number correctly when the ONU receives the downlink registration signal and determines that the optical signal amplifier has the actual gain minimum registration time slot;
  • the sixth establishing unit 248 is configured to establish a correspondence between the ONU ID, the optical signal amplifier gain, and the tunable optical attenuator attenuation.
  • the number of the optical signal amplifier or the tunable optical attenuator is multiple.
  • the correspondence relationship is multiple, wherein the multiple correspondences are respectively the power control factors of each ONU ID and the corresponding uplink optical signal. The relationship between.
  • the upstream optical signal is subjected to corresponding power control via the common optical signal amplifier before the upstream optical signal reaches the plurality of optical signal amplifiers and/or the tunable optical attenuator.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination.
  • the forms are located in different processors.
  • An embodiment of the present invention also provides an optical line terminal OLT, including the apparatus of Embodiment 2 above.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • the processor performs the above steps S1, S2, and S3 according to the stored program code in the storage medium.
  • Embodiments of the present invention also provide an electronic device comprising a memory and a processor having a computer program stored therein, the processor being arranged to execute a computer program to perform the steps of any of the method embodiments described above.
  • the electronic device may further include a transmission device and an input and output device, wherein the transmission device is connected to the processor, and the input and output device is connected to the processor.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the power control method and apparatus for an optical signal and the optical line terminal provided by the embodiments of the present invention have the following beneficial effects: the equalization problem of the uplink burst signal amplification of the ONU of the optical network unit in the related art is solved, and the reduction is achieved. The technical effect of the required power range of the OLT receiver.

Abstract

本发明实施例提供了一种光信号的功率控制方法、装置及光线路终端。其中，该方法包括：获取各光网络单元ONU的上行光信号到达光信号放大器或可调光衰减器的不同时刻；建立该ONU ID与该上行光信号的功率控制因子之间的对应关系；根据该不同时刻和该对应关系，对该上行光信号进行功率控制。通过本发明实施例，解决了相关技术中光网络单元ONU上行突发信号放大的均衡问题，达到了降低OLT接收机的接收功率范围要求的技术效果。

Description

光信号的功率控制方法、装置及光线路终端 技术领域
本发明涉及通信领域，具体而言，涉及一种光信号的功率控制方法、装置及光线路终端。
背景技术
随着用户对带宽需求的不断提升，接入领域无源光网络(Passive Optical Network，简称为PON)的技术也在不断更新，从EPON(全称为Ethernet Passive Optical Network，以太网无源光网络)，GPON(全称为Gight-Capable Passive Optical Network，无源光接入系统)到10GEPON，XGPON再到NGPON2和正在研究推进的100GEPON，接入技术带宽不断增大。但是，带宽的增大会带来功率预算不够的问题，由于接入网用户很多，因此需要很高的功率预算，以便局端和终端接收光功率都能满足灵敏度要求，达到良好的传输性能。为了达到功率预算要求，需要加入光放大器，目前通讯系统中常用的光放大器是掺铒光纤放大器(Erbium-doped Optical Fiber Amplifier，简称为EDFA)和半导体光放大器(Semiconductor Optical Amplifier，简称为SOA)。SOA由于其具有相对平坦且广泛的增益谱，快速的动态响应，以及可集成等优势，越来越受到关注，成为光接入领域光放大器件的良好选择。
但是，PON系统中有一个动态范围问题，由于不同的光网络单元(Optical Network Unit，简称为ONU)发射光功率不同，且不同的ONU到光线路终端(Optical Line Terminal，简称为OLT)的距离也不同，这导致OLT接收不同ONU的光功率不同。如果SOA保持同一种增益，可能会导致有的ONU接收光放大倍数不够，达不到OLT灵敏度要求，而有的ONU接收光放大倍数过大，导致OLT出现过载，甚至可能损毁OLT接收机。因此，需要有一种机制来控制SOA的输出光功率，使得SOA可以根据不同的入射光功率合理地调整增益，或在SOA后加可调衰减，使得出 射光都能达到一个相对一致的功率。
针对相关技术中，光网络单元ONU上行突发信号放大的均衡问题，尚未提出有效的解决方案。
发明内容
本发明实施例提供了一种光信号的功率控制方法、装置及光线路终端，以至少解决相关技术中光网络单元ONU上行突发信号放大的均衡问题。
根据本发明的一个实施例，提供了一种光信号的功率控制方法，包括：获取各光网络单元ONU的上行光信号到达光信号放大器或可调光衰减器的不同时刻；建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系；根据所述不同时刻和所述对应关系，对所述上行光信号进行功率控制。
可选地，所述功率控制因子包括以下至少之一：光信号放大器的增益、可调光衰减器的衰减。
可选地，所述功率控制因子为所述光信号放大器的增益时，建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系包括：分配注册时隙，并发送下行注册信号；在ONU接收到所述下行注册信号且判断满足所述注册时隙的功率要求时，开始注册并建立所述ONU ID和光信号放大器的增益之间的对应关系。
可选地，在所述功率控制因子为所述光信号放大器的增益时，建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系包括：分配注册时隙，并发送下行注册信号，其中，所述下行注册信号中包含光信号放大器的增益信息；在ONU接收到所述下行注册信号且判断处于光信号放大器增益最小注册时隙时，增大光信号放大器增益直至正确接收ONU发送的序列号；建立所述ONU ID和光信号放大器增益之间的对应关系。
可选地，在所述功率控制因子为可调光衰减器的衰减时，建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系包括：分配注 册时隙，并发送下行注册信号，其中，所述注册时隙预分配一个衰减值；在ONU接收到所述下行注册信号且判断符合所述注册时隙的功率要求时，开始注册并建立ONU ID和可调光衰减器之间的衰减关系。
可选地，在所述功率控制因子为可调光衰减器的衰减时，建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系包括：设置可调光衰减器的衰减为最大；分配注册时隙，并发送下行注册信号，其中，所述下行注册信号中包含可调光衰减器的衰减信息；在ONU接收到所述下行注册信号且判断处于光信号放大器实际增益最小注册时隙时，减少可调光衰减器的衰减直至正确接收ONU发送的序列号；建立ONU ID和可调光衰减器之间的衰减关系。
可选地，在所述功率控制因子为光信号放大器的增益和可调光衰减器的衰减时，建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系包括：分配注册时隙，并发送下行注册信号，其中，在所述注册时隙光信号放大器设置有一个预分配的增益、可调光衰减器设置有一个预分配的衰减；在ONU接收到所述下行注册信号且判断符合所述注册时隙的功率要求时，开始注册并建立ONU ID、光信号放大器增益以及可调光衰减器衰减之间的对应关系。
可选地，在所述功率控制因子为光信号放大器的增益和可调光衰减器的衰减时，建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系包括：设置光信号放大器的实际增益最小；分配注册时隙，并发送下行注册信号，其中，所述下行注册信号包括光信号放大器实际增益信息；在ONU接收到所述下行注册信号且判断处于光信号放大器实际增益最小注册时隙时，增大光信号放大器增益直至正确接收ONU发送的序列号；建立ONU ID、光信号放大器增益以及可调光衰减器衰减之间的对应关系。
可选地，所述光信号放大器或所述可调光衰减器的个数为多个。
可选地，在所述上行光信号到达所述多个光信号放大器和/或所述可调光衰减器之前，所述上行光信号经由公共光信号放大器被执行相应的功率 控制。
可选地，在所述光信号放大器或所述可调光衰减器的个数为多个时，所述对应关系为多个，其中，所述多个对应关系分别为每一路ONU ID和对应的上行光信号的功率控制因子之间的关系。
根据本发明的另一个实施例，提供了一种光信号的功率控制装置，包括：获取模块，设置为获取各光网络单元ONU的上行光信号到达光信号放大器的不同时刻；建立模块，设置为建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系；控制模块，设置为根据所述不同时刻和所述对应关系，对所述上行光信号进行功率控制。
可选地，所述功率控制因子包括以下至少之一：光信号放大器的增益、可调光衰减器的衰减。
可选地，所述建立模块包括：第一分配单元，设置为在所述功率控制因子为所述光信号放大器的增益时分配注册时隙，并发送下行注册信号；第一建立单元，设置为在ONU接收到所述下行注册信号且判断满足所述注册时隙的功率要求时，开始注册并建立所述ONU ID和光信号放大器的增益之间的对应关系。
可选地，所述建立模块包括：第二分配单元，设置为在所述功率控制因子为所述光信号放大器的增益时分配注册时隙，并发送下行注册信号，其中，所述下行注册信号中包含光信号放大器的增益信息；第一增加单元，设置为在ONU接收到所述下行注册信号且判断处于光信号放大器增益最小注册时隙时，增大光信号放大器增益直至正确接收ONU发送的序列号；第二建立单元，设置为建立所述ONU ID和光信号放大器增益之间的对应关系。
可选地，所述建立模块包括：第三分配单元，设置为在所述功率控制因子为可调光衰减器的衰减时分配注册时隙，并发送下行注册信号，其中，所述注册时隙预分配一个衰减值；第三建立单元，设置为在ONU接收到所述下行注册信号且判断符合所述注册时隙的功率要求时，开始注册并建 立ONU ID和可调光衰减器之间的衰减关系。
可选地，所述建立模块包括：第一设置单元，设置为在所述功率控制因子为可调光衰减器的衰减时设置可调光衰减器的衰减为最大；第四分配单元，设置为分配注册时隙，并发送下行注册信号，其中，所述下行注册信号中包含可调光衰减器的衰减信息；减少单元，设置为在ONU接收到所述下行注册信号且判断处于光信号放大器实际增益最小注册时隙时，减少可调光衰减器的衰减直至正确接收ONU发送的序列号；第四建立单元，设置为建立ONU ID和可调光衰减器之间的衰减关系。
可选地，所述建立模块包括：第五分配单元，设置为在所述功率控制因子为光信号放大器的增益和可调光衰减器的衰减时分配注册时隙，并发送下行注册信号，其中，在所述注册时隙光信号放大器设置有一个预分配的增益、可调光衰减器设置有一个预分配的衰减；第五建立单元，设置为在ONU接收到所述下行注册信号且判断符合所述注册时隙的功率要求时，开始注册并建立ONU ID、光信号放大器增益以及可调光衰减器衰减之间的对应关系。
可选地，所述建立模块包括：第二设置单元，设置为在所述功率控制因子为光信号放大器的增益和可调光衰减器的衰减时，设置光信号放大器的实际增益最小；第六分配单元，设置为分配注册时隙，并发送下行注册信号，其中，所述下行注册信号包括光信号放大器实际增益信息；第二增加单元，设置为在ONU接收到所述下行注册信号且判断处于光信号放大器实际增益最小注册时隙时，增大光信号放大器增益直至正确接收ONU发送的序列号；第六建立单元，设置为建立ONU ID、光信号放大器增益以及可调光衰减器衰减之间的对应关系。
可选地，所述光信号放大器或所述可调光衰减器的个数为多个。
可选地，在所述上行光信号到达所述多个光信号放大器和/或所述可调光衰减器之前，所述上行光信号经由公共光信号放大器被执行相应的功率控制。
可选地，在所述光信号放大器或所述可调光衰减器的个数为多个时，所述对应关系为多个，其中，所述多个对应关系分别为每一路ONU ID和对应的上行光信号的功率控制因子之间的关系。
根据本发明的又一个实施例，还提供了一种光线路终端OLT，包括上述的装置。
根据本发明的又一个实施例，还提供了一种存储介质。该存储介质设置为存储用于执行以下步骤的程序代码：
获取各光网络单元ONU的上行光信号到达光信号放大器或可调光衰减器的不同时刻；建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系；根据所述不同时刻和所述对应关系，对所述上行光信号进行功率控制。
根据本发明的又一个实施例，还提供了一种电子装置，包括存储器和处理器，所述存储器中存储有计算机程序，所述处理器被设置为运行所述计算机程序以执行上述任一项方法实施例中的步骤。
通过本发明，获取各光网络单元ONU的上行光信号到达光信号放大器或可调光衰减器的不同时刻；建立该ONU ID与该上行光信号的功率控制因子之间的对应关系；根据该不同时刻和该对应关系，对该上行光信号进行功率控制，使得ONU的上行突发信号放大到OLT接收机能够接收的范围，进而解决了相关技术中光网络单元ONU上行突发信号放大的均衡问题，达到了降低OLT接收机的接收功率范围要求的技术效果。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例的光信号的功率控制方法流程图；
图2是根据本发明实施例的光信号的功率控制结构示意图(一)；
图3是根据本发明实施例的ONU注册时的系统框图；
图4是根据本发明实施例的ONU注册流程图(一)；
图5是根据本发明实施例的ONU注册流程图(二)；
图6是根据本发明实施例的光信号的功率控制结构示意图(二)；
图7是根据本发明实施例的光信号的功率控制结构示意图(三)；
图8是根据本发明实施例的ONU注册流程图(三)；
图9是根据本发明实施例的ONU注册流程图(四)；
图10是根据本发明实施例的ONU注册流程图(五)；
图11是根据本发明实施例的ONU注册流程图(六)；
图12是根据本发明实施例的多通道光信号的功率控制结构意图；
图13是根据本发明实施例的多通道光信号的功率控制结构示意图(一)；
图14是根据本发明实施例的多通道光信号的功率控制结构示意图(二)；
图15是根据本发明实施例的多通道光信号的功率控制结构示意图(三)；
图16是根据本发明实施例的多通道光信号的功率控制结构示意图(四)；
图17是根据本发明实施例的多通道光信号的功率控制结构示意图(五)；
图18是根据本发明实施例的光信号的功率控制装置的结构框图；
图19是根据本发明实施例的光信号的功率控制装置的结构框图(一)；
图20是根据本发明实施例的光信号的功率控制装置的结构框图(二)；
图21是根据本发明实施例的光信号的功率控制装置的结构框图(三)；
图22是根据本发明实施例的光信号的功率控制装置的结构框图(四)；
图23是根据本发明实施例的光信号的功率控制装置的结构框图(五)；
图24是根据本发明实施例的光信号的功率控制装置的结构框图(六)。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
实施例1
在本实施例中提供了一种光信号的功率控制方法，图1是根据本发明实施例的光信号的功率控制方法流程图，如图1所示，该流程包括如下步骤：
步骤S102，获取各光网络单元ONU的上行光信号到达光信号放大器或可调光衰减器的不同时刻；
步骤S104，建立该ONU ID与该上行光信号的功率控制因子之间的对应关系；
步骤S106，根据该不同时刻和该对应关系，对该上行光信号进行功率控制。
可选地，在本实施例中，上述光信号的放大方法的应用场景包括但并不限于：无源光网络(Passive Optical Network，PON)，在该应用场景下，获取各光网络单元ONU的上行光信号到达光信号放大器或可调光衰减器的不同时刻；建立该ONU ID与该上行光信号的功率控制因子之间的对应关系；根据该不同时刻和该对应关系，对该上行光信号进行功率控制，使得ONU的上行突发信号放大到OLT接收机能够接收的范围，进而解决了相关技术中光网络单元ONU上行突发信号放大的均衡问题，达到了降低OLT接收机的接收功率范围要求的技术效果。
需要说明的是，在本实施例中，光信号放大器的个数包括但并不限于：一个多个；可调光衰减器的个数包括但并不限于：一个多个。
可选地，在本实施例中，上述光信号放大器主要以半导体放大器SOA为例进行说明。
下面结合具体示例，对本实施例进行举例说明。
如图2所示，通过DBA(全称为Dynamic Bandwidth Allocation，动态带宽分配)可以知道每个ONU上行信号到达SOA的时刻，在此时刻通过基于DBA的输出功率控制模块调节SOA增益，或SOA后面的可调光衰减器(Variable Optical Attenuator，简称为VOA)衰减，或者同时调SOA增益和VOA衰减，就可以使ONU的上行突发信号放大到OLT接收机能够接收的范围，达到了放大的效果并降低了OLT接收机的接收功率范围要求。
可选地，上述功率控制因子包括但并不限于：光信号放大器的增益、可调光衰减器的衰减。
在本发明的一个可选实施方式中，在该功率控制因子为该光信号放大器的增益时，建立该ONU ID与该上行光信号的功率控制因子之间的对应关系包括以下步骤：
步骤S11，分配注册时隙，并发送下行注册信号；
步骤S12，在ONU接收到该下行注册信号且判断满足该注册时隙的功率要求时，开始注册并建立该ONU ID和光信号放大器的增益之间的对应关系。
通过上述步骤S11至S12，进一步使得ONU的上行突发信号放大到OLT接收机能够接收的范围，进而解决了相关技术中光网络单元ONU上行突发信号放大的均衡问题，达到了降低OLT接收机的接收功率范围要求的技术效果。
可选地，在该功率控制因子为该光信号放大器的增益时，建立该ONU ID与该上行光信号的功率控制因子之间的对应关系包括以下步骤：
步骤S13，分配注册时隙，并发送下行注册信号，其中，该下行注册信号中包含光信号放大器的增益信息；
步骤S14，在ONU接收到该下行注册信号且判断处于光信号放大器增益最小注册时隙时，增大光信号放大器增益直至正确接收ONU发送的序列号；
步骤S15，建立该ONU ID和光信号放大器增益之间的对应关系。
在一个可选地实施方式中，在该功率控制因子为可调光衰减器的衰减时，建立该ONU ID与该上行光信号的功率控制因子之间的对应关系包括以下步骤：
步骤S21，分配注册时隙，并发送下行注册信号，其中，该注册时隙预分配一个衰减值；
步骤S22，在ONU接收到该下行注册信号且判断符合该注册时隙的功率要求时，开始注册并建立ONU ID和可调光衰减器之间的衰减关系。
通过上述步骤S21至S22，进一步使得ONU的上行突发信号放大到OLT接收机能够接收的范围，进而解决了相关技术中光网络单元ONU上行突发信号放大的均衡问题，达到了降低OLT接收机的接收功率范围要求的技术效果。
可选地，在该功率控制因子为可调光衰减器的衰减时，建立该ONU ID与该上行光信号的功率控制因子之间的对应关系包括以下步骤：
步骤S23，设置可调光衰减器的衰减为最大；
步骤S24，分配注册时隙，并发送下行注册信号，其中，该下行注册信号中包含可调光衰减器的衰减信息；
步骤S25，在ONU接收到该下行注册信号且判断处于光信号放大器实际增益最小注册时隙时，减少可调光衰减器的衰减直至正确接收ONU发送的序列号；
步骤S26，建立ONU ID和可调光衰减器之间的衰减关系。
在一个可选地实施方式中，在该功率控制因子为光信号放大器的增益和可调光衰减器的衰减时，建立该ONU ID与该上行光信号的功率控制因子之间的对应关系包括以下步骤：
步骤S31，分配注册时隙，并发送下行注册信号，其中，在该注册时隙光信号放大器设置有一个预分配的增益、可调光衰减器设置有一个预分配的衰减；
步骤S32，在ONU接收到该下行注册信号且判断符合该注册时隙的功率要求时，开始注册并建立ONU ID、光信号放大器增益以及可调光衰减器衰减之间的对应关系。
通过上述步骤S31至S32，进一步使得ONU的上行突发信号放大到OLT接收机能够接收的范围，进而解决了相关技术中光网络单元ONU上行突发信号放大的均衡问题，达到了降低OLT接收机的接收功率范围要求的技术效果。
可选地，在该功率控制因子为光信号放大器的增益和可调光衰减器的衰减时，建立该ONU ID与该上行光信号的功率控制因子之间的对应关系包括以下步骤：
步骤S33，设置光信号放大器的实际增益最小；
步骤S34，分配注册时隙，并发送下行注册信号，其中，该下行注册信号包括光信号放大器实际增益信息；
步骤S35，在ONU接收到该下行注册信号且判断处于光信号放大器实际增益最小注册时隙时，增大光信号放大器增益直至正确接收ONU发送的序列号；
步骤S36，建立ONU ID、光信号放大器增益以及可调光衰减器衰减之间的对应关系。
在一个可选实施方式中，上述光信号放大器或该可调光衰减器的个数为多个。在该光信号放大器或该可调光衰减器的个数为多个时，该对应关系为多个，其中，该多个对应关系分别为每一路ONU ID和对应的上行光 信号的功率控制因子之间的关系。
可选地，在该上行光信号到达该多个光信号放大器和/或该可调光衰减器之前，该上行光信号经由公共光信号放大器被执行相应的功率控制。
下面结合具体示例，对本实施例进行举例说明。
可选实施例一
本可选实施例一共分为两步，第一步在注册阶段建立ONU ID和SOA增益之间的关系。第二步根据得到的关系，联系DBA，建立动态增益调整表，基于DBA的输出功率控制模块依据此表动态调整SOA增益，使每个ONU发出的光信号功率都能得到放大，并且放大后的光功率趋于一致。
第一步，ONU ID和SOA增益的对应关系。
由于一开始不知道每个ONU的上行光信号到达SOA的功率值，因此无法确定对应于每个ONU上行光信号的合适的SOA的增益。在PON的标准中ODN的动态范围达15dB，ONU发射光功率波动范围为5dB，因此到达OLT接收机的光功率差异最大可达20dB。如果SOA增益设置过小，则那些信号到OLT衰减较大的ONU无法注册，但是如果SOA增益过大又可能造成那些信号到OLT衰减较小的ONU光功率放大过大，损坏OLT的光接收机。因此需要一个合适的方式，通过合适的增益使OLT能够正确接收ONU上行突发信息，记录此时的ONU ID和SOA增益值，建立两者的关系。以下提供两种ONU注册方式：
图3为ONU注册时的系统框图，如图3所示，OLT包含媒质接入层(MAC)，DBA模块，光发射模块Tx，可以测量光功率的光接收模块Rx，滤除SOA放大的自发辐射(Amplified Spontaneous Emission，简称为ASE)噪声的滤波器，SOA和基于DBA的输出功率控制模块。基于DBA的输出功率控制模块可以由存储器，控制器和驱动器组成，存储器用来存储动态增益调整表，控制器根据这个表来控制驱动器驱动SOA，改变其增益。控制器也可以直接接收OLT指令调整SOA增益。
第一种ONU注册方式：如图3，OLT分段分配注册时隙，每个时隙 SOA有一个预分配的增益，这个预分配的增益根据可能入射到SOA的功率范围和OLT接收机接收光功率范围设置。比如，假设系统动态范围为20dB，入射SOA的光功率范围为[-40dBm,-20dBm]，OLT接收机接收功率范围为[-28dBm,-8dBm]，那么可以分段分配两个注册时隙，每个注册时隙对应的SOA预分配的增益值分别为10dB和15dB，这样入射SOA功率为[-40dBm,-30dBm]对应的ONU可以在SOA增益为15dB的时隙注册，入射SOA功率为[-30dBm,-20dBm]对应的ONU可以在SOA增益为10dB的时隙注册。在某个注册时隙，OLT通过基于DBA的输出功率控制模块分配给SOA一个增益并发送下行信号，该信号包含OLT的发射光功率信息，并通知符合要求的ONU发送上行信号，所述符合要求的ONU为ONU发射功率减去上行链路衰减后的值，即入射SOA的功率值，在这个时隙规定的功率范围内。ONU已知OLT的发射光功率，ONU根据接收到的下行光信号功率计算出上行链路衰减，所述上行链路衰减为OLT发射光功率减去ONU接收到的下行光信号功率值，然后ONU根据自己发射机的发射光功率减去上行链路衰减的值判断到上行到达SOA的光功率是否符合这一分配时隙的功率要求，如果不符合，则等待下一个分配时隙，反之，如果符合，则上行发送ONU序列号开始注册，上行信号经过预分配增益的SOA放大后再经过滤波器过滤ASE噪声，接收机接收过滤的信号，测量其光功率，并将光信号转换为电信号传给MAC。OLT记下此时SOA的增益值和ONU的ID，完成注册，并建立ONU ID和SOA增益关系。流程图如图4所示。
建立的ONU ID和SOA增益关系如表1所示。
表1
ONU-ID 增益[dB]
1 G 1
2 G 2
3 G 1
4 G 2
5 G 2
… …
n Gn
第二种注册方式：OLT通过基于DBA的输出功率控制模块给SOA一个最低增益，例如5dB，然后OLT分配注册时隙，下行发送注册信号，该信号包含此时SOA的增益值。ONU接收到注册信号后判断是否处于SOA增益最小时的注册时隙，如果是，则上行发送序列号信息，如果不是，则等待SOA增益最小时的注册时隙。所述上行光信号经过SOA放大，ASE滤波器滤波后由OLT接收机接收，如果OLT正确接收，则记下此时ONU ID和SOA增益值，建立ONU ID和SOA增益关系，如果OLT无法正确接收，则OLT增大SOA增益一个固定的值，例如5dB，再次重复上述步骤。SOA增益增大到某个值后，OLT可以正确接收ONU上行信号，此时，记下ONU ID和SOA增益，建立ONU ID和SOA增益关系，并完成注册。流程图如图5所示。
第二步，OLT根据DBA和链路时延，计算每个ONU光信号到达SOA的时刻，结合注册过程得到的ONU ID和SOA增益关系，建立动态增益调整表，如表2所示，动态地使用基于DBA的输出功率控制模块调整SOA增益值，使得每个ONU突发光信号功率趋于一致。
表2
ONU-ID 到达OLT时刻 突发时长 增益(dB)
1 t 1 a G 1
2 t 2 b G 2
3 t 3 c G 1
4 t 4 d G 2
5 t 5 e G 2
… … … …
n tn n Gn
可选地，在注册阶段，OLT可以根据接收到的ONU光功率微调SOA增益，使上行光功率经过SOA放大后达到OLT接收机的最佳接收功率，比如-18dBm，再记下此时ONU ID和SOA增益，使每个ONU都有一个一对一的SOA增益，这样，每个ONU的上行光信号都能放大到一致的OLT最佳接收功率。如图6所示，图6中增益均衡放大模块由图2组成，不同ONU的突发光信号经过增益均衡放大模块放大后，光功率调整在OLT接收机的最佳接收功率，提高功率预算的同时大大降低了OLT接收机动态带宽范围要求。
可选实施例二
根据DBA动态调整SOA后面VOA的值。可选实施例二和可选实施例一类似，不同点为通过调整衰减来调整OLT接收机接收功率。
SOA实际增益＝SOA固定增益-VOA衰减(式1)
基于DBA的输出功率控制模块可以由存储器，控制器和步进电机组成，步进电机调整VOA衰减。
第一步，建立ONU ID和VOA衰减关系。
第一种ONU注册方式：如图7所示，SOA工作在固定增益，OLT分段分配注册时隙，每个时隙VOA有一个预分配的衰减，这个预分配的衰减根据可能入射到SOA的功率范围和OLT接收机接收光功率范围设置。比如，假设系统动态范围为20dB，SOA工作在20dB固定增益，入射SOA的光功率范围为[-40dBm,-20dBm]，OLT接收机接收功率范围为[-28dBm,-8dBm]，那么可以分段分配两个注册时隙，每个注册时隙对应的VOA预分配的衰减值分别为10dB和5dB，这样入射SOA功率为[-40dBm,-30dBm]对应的ONU可以在VOA衰减为5dB的时隙注册，入射SOA功率为[-30dBm,-20dBm]对应的ONU可以在VOA衰减为10dB的时 隙注册。在某个注册时隙，OLT通过基于DBA的输出功率控制模块分配给VOA一个衰减并发送下行信号，该信号通知符合要求的ONU发送上行信号，所述符合要求的ONU为ONU发射功率减去上行链路衰减后的值，即入射SOA的功率值，在这个时隙规定的功率范围内。ONU已知OLT的发射光功率，ONU根据接收到的下行光信号功率计算出上行链路衰减，所述上行链路衰减为OLT发射光功率减去ONU接收到的下行光信号功率值，然后ONU根据自己发射机的发射光功率减去上行链路衰减的值判断到上行到达SOA的光功率是否符合这一分配时隙的功率要求，如果不符合，则等待下一个分配时隙，反之，如果符合，则上行发送ONU序列号开始注册，上行信号经过固定增益的SOA放大再经过VOA衰减后再经过滤波器过滤ASE噪声，接收机接收过滤的信号，测量其光功率，并将光信号转换为电信号传给MAC。OLT记下此时VOA的衰减值和ONU的ID，完成注册，并建立ONU ID和VOA衰减关系。流程图如图8所示。
建立的ONU ID和VOA衰减形式如表3所示。
表3
ONU-ID VOA衰减[dB]
1 A 1
2 A 2
3 A 1
4 A 2
5 A 2
… …
n An
第二种注册方式：OLT通过基于DBA的输出功率控制模块给VOA一个最大衰减，例如10dB，然后OLT分配注册时隙，下行发送注册信号，该信号包含此时SOA的实际增益值(式1)。ONU接收到注册信号后判断 是否处于SOA实际增益最小时的注册时隙，如果是，则上行发送序列号信息，如果不是，则等待SOA实际增益最小时的注册时隙。所述上行光信号经过SOA放大，VOA衰减，ASE滤波器滤波后由OLT接收机接收，如果OLT正确接收，则记下此时ONU ID和VOA衰减值，建立ONU ID和VOA衰减关系，如果OLT无法正确接收，则OLT减小VOA衰减一个固定的值，例如5dB，再次重复上述步骤。VOA衰减减小到某个值后，OLT可以正确接收ONU上行信号，此时，记下ONU ID和VOA衰减，建立ONU ID和VOA衰减关系，并完成注册。流程图如图9所示。
第二步，OLT根据DBA和链路时延，计算每个ONU光信号到达VOA的时刻，结合注册过程得到的ONU ID和VOA衰减关系，建立动态增益调整表，如表4所示，动态地使用基于DBA的输出功率控制模块调整VOA的衰减值，使得每个ONU突发光信号功率趋于一致。
表4
ONU-ID 到达OLT时刻 突发时长 VOA衰减(dB)
1 t 1 a A 1
2 t 2 b A 2
3 t 3 c A 1
4 t 4 d A 2
5 t 5 e A 2
… … … …
n tn n An
可选地，在注册阶段，OLT可以根据接收到的ONU光功率微调VOA衰减，使上行光功率经过SOA放大和VOA衰减后达到OLT接收机的最佳接收功率，比如-18dBm，再记下此时ONU ID和VOA衰减，使每个ONU都有一个一对一的VOA衰减，这样，每个ONU的上行光信号都能放大到一致的OLT最佳接收功率。
可选实施例三
与可选实施例一、可选实施例二类似，不同点为通过同时调整SOA增益和VOA衰减来调整OLT接收机接收功率。这样做的优点是降低了SOA和VOA的调节范围要求。
SOA实际增益＝SOA增益-VOA衰减(式2)
基于DBA的输出功率控制模块可以由存储器，控制器，驱动器和步进电机组成，驱动器调整SOA增益，步进电机调整VOA衰减。
第一步，建立ONU ID和SOA增益、VOA衰减关系。
第一种ONU注册方式：OLT分段分配注册时隙，每个时隙SOA有一个预分配的增益，VOA有一个预分配的衰减，这两个值的差值统称为SOA实际增益。这个预分配的实际增益根据可能入射到SOA的功率范围和OLT接收机接收光功率范围设置。比如，假设系统动态范围为20dB，入射SOA的光功率范围为[-40dBm,-20dBm]，OLT接收机接收功率范围为[-28dBm,-8dBm]，那么可以分段分配两个注册时隙，每个注册时隙对应的SOA预分配的实际增益值分别为10dB和15dB，对应地，当实际增益值为10dB时，SOA增益可以是15dB，VOA衰减可以是5dB；当实际增益值为15dB时，SOA增益可以是17dB，VOA衰减可以是2dB，这样原本单独调节SOA或者VOA需要5dB的调节范围，同时调节SOA和VOA可以将范围缩小到2dB和3dB。入射SOA功率为[-40dBm,-30dBm]对应的ONU可以在SOA实际增益为5dB的时隙注册，入射SOA功率为[-30dBm,-20dBm]对应的ONU可以在SOA实际功率为10dB的时隙注册。在某个注册时隙，OLT通过基于DBA的输出功率控制模块分配给SOA一个增益，VOA一个衰减并发送下行信号，该信号通知符合要求的ONU发送上行信号，所述符合要求的ONU为ONU发射功率减去上行链路衰减后的值，即入射SOA的功率值，在这个时隙规定的功率范围内。ONU已知OLT的发射光功率，ONU根据接收到的下行光信号功率计算出上行链路衰减，所述上行链路衰减为OLT发射光功率减去ONU接收到的下行光 信号功率值，然后ONU根据自己发射机的发射光功率减去上行链路衰减的值判断到上行到达SOA的光功率是否符合这一分配时隙的功率要求，如果不符合，则等待下一个分配时隙，反之，如果符合，则上行发送ONU序列号开始注册，上行信号经过SOA放大再经过VOA衰减后再经过滤波器过滤ASE噪声，接收机接收过滤的信号，测量其光功率，并将光信号转换为电信号传给MAC。OLT记下此时SOA增益值，VOA的衰减值和ONU的ID，完成注册，并建立ONU ID和SOA增益和VOA衰减关系。流程图如图10所示。
建立的ONU ID和SOA增益、VOA衰减形式如表5所示。
表5
Figure PCTCN2018078245-appb-000001
第二种注册方式：OLT通过基于DBA的输出功率控制模块给SOA一个实际最小增益，例如5dB，这个实际增益可以是SOA增益为10dB，VOA衰减为5dB。然后OLT分配注册时隙，下行发送注册信号，该信号包含此时SOA的实际增益值(式2)。ONU接收到注册信号后判断是否处于SOA实际增益最小时的注册时隙，如果是，则上行发送序列号信息，如果不是，则等待SOA实际增益最小时的注册时隙。所述上行光信号经过SOA放大，VOA衰减，ASE滤波器滤波后由OLT接收机接收，如果OLT正确接收， 则记下此时ONU ID和和SOA增益值和VOA衰减值，建立ONU ID和SOA增益和VOA衰减关系，如果OLT无法正确接收，则OLT增大SOA实际增益一个固定的值，例如5dB，例如可以通过将SOA增益增大到13dB，VOA衰减减小到3dB实现。然后再次重复上述步骤。SOA实际增益增大到某个值后，OLT可以正确接收ONU上行信号，此时，记下ONU ID和SOA增益和VOA衰减，建立ONU ID和SOA增益和VOA衰减关系，并完成注册。流程图如图11所示。
第二步，OLT根据DBA和链路时延，计算每个ONU光信号到达SOA的时刻，结合注册过程得到的ONU ID和SOA增益、VOA衰减关系，建立动态增益调整表，如表6所示，动态地使用基于DBA的输出功率控制模块SOA增益和VOA的衰减值，使得每个ONU突发光信号功率趋于一致。
表6
Figure PCTCN2018078245-appb-000002
可选地，在注册阶段，OLT可以根据接收到的ONU光功率微调SOA增益和VOA衰减，使上行光功率经过SOA放大和VOA衰减后达到OLT接收机的最佳接收功率，比如-18dBm，再记下此时ONU ID和SOA增益和VOA衰减，使每个ONU都有一个一对一的SOA增益和VOA衰减， 这样，每个ONU的上行光信号都能放大到一致的OLT最佳接收功率。
可选实施例五
本实施例中还提出一种多通道放大的架构和基于这种架构的针对每个通道的放大输出功率均衡方法，以及这种OLT。通过本可选实施例解决了每个通道功率均衡问题的同时，也解决了不同通道共用一个SOA所带来的不同通道进入SOA功率不同，SOA增益无法选择的问题。
如图12所示，上行信号线经过SOA进行第一步放大，然后经过WDM分成4路不通波长的信号，每一路信号再经过SOA放大，滤波器过滤ASE噪声，可调光衰减器(VOA)衰减后，以合适的功率进入接收机。功率控制模块通过动态带宽分配(DBA)调节SOA增益或VOA衰减，或同时调节二者，使得每一路信号的不同ONU的突发包经过放大后，进入接收机的功率在接收机工作范围内。具体过程分为两步：
第一步，建立每个ONU ID和对应那一路SOA增益(VOA衰减)的对应关系。
第二步，根据DBA在每一路信号经过WDM分波后，实时调整SOA增益(VOA衰减)，使入射接收机光功率在接收机工作范围内。
需要说明的是，本实施例和上述可选实施例一、可选实施例二、可选实施例三以及可选实施例四的实现方式类似，区别在于本实施例中SOA、VOA可以为多个，在注册阶段建立每一路ONU ID和对应那一路SOA增益之间的关系，在调整时，具体是多路SOA增益(VOA衰减)。
下面结合具体示例，对本可选实施例进行举例说明。
示例1
图13是本示例根据DBA动态调整WDM后每一路SOA增益的结构示意图，在该架构下一共分为两步，第一步在注册阶段建立每一路ONU ID和对应那一路SOA增益之间的关系。第二步根据得到的关系，联系DBA，建立动态增益调整表，基于DBA的输出功率控制模块依据此表动态调整SOA增益，使每个ONU发出的光信号功率都能得到放大，并且放大后的 光功率在接收机工作范围内。
第一步，建立每一路ONU ID和对应那一路SOA增益的对应关系。
由于一开始不知道每路ONU的上行光信号到达SOA的功率值，因此无法确定对应于每个ONU上行光信号的合适的SOA的增益。在PON的标准中ODN的动态范围达15dB，ONU发射光功率波动范围为5dB，因此到达OLT接收机的光功率差异最大可达20dB。如果SOA增益设置过小，则那些信号到OLT衰减较大的ONU无法注册，但是如果SOA增益过大又可能造成那些信号到OLT衰减较小的ONU光功率放大过大，损坏OLT的光接收机。
因此需要一个合适的方式，通过合适的增益使OLT能够正确接收ONU上行突发信息，记录此时的ONU ID和SOA增益值，建立两者的关系。以下提供两种ONU注册方式：
第一种ONU注册方式：对于每路信号，OLT分段分配注册时隙，每个时隙每路SOA有一个预分配的增益，这个预分配的增益根据可能入射到SOA的功率范围和OLT接收机接收光功率范围设置。比如，假设系统动态范围为20dB，入射SOA的光功率范围为[-40dBm,-20dBm]，OLT接收机接收功率范围为[-28dBm,-8dBm]，那么可以分段分配两个注册时隙，每个注册时隙对应的SOA预分配的增益值分别为10dB和15dB，这样入射SOA功率为[-40dBm,-30dBm]对应的ONU可以在SOA增益为15dB的时隙注册，入射SOA功率为[-30dBm,-20dBm]对应的ONU可以在SOA增益为10dB的时隙注册。
在某个注册时隙，OLT通过基于DBA的输出功率控制模块分配给SOA一个增益并发送下行信号，该信号包含一路OLT下行发射功率信息，并通知符合要求的ONU发送上行信号。
所述符合要求的ONU为ONU发射功率减去上行链路衰减后的值，即入射SOA的功率值，在这个时隙规定的功率范围内。
ONU通过下行信号获取OLT的发射光功率，ONU根据接收到的下行 光信号功率计算出上行链路衰减，所述上行链路衰减为OLT发射光功率减去ONU接收到的下行光信号功率值，然后ONU根据自己发射机的发射光功率减去上行链路衰减的值判断到上行到达SOA的光功率是否符合这一分配时隙的功率要求，如果不符合，则等待下一个分配时隙，反之，如果符合，则上行发送ONU序列号开始注册，上行信号经过预分配增益的SOA放大后再经过滤波器过滤ASE噪声，接收机接收过滤的信号，并测量其光功率。OLT记下此时SOA的增益值和ONU的ID，完成注册，并建立ONU ID和SOA增益关系。注册过程4个通道可以同时进行，单个通道流程图如图4所示。
建立的ONU ID和SOA增益关系如表7所示。
表7
λ 0ONU-ID 增益[dB]
1 G 1
2 G 2
… …
n Gn
λ 1ONU-ID 增益[dB]
1 G 2
2 G 1
… …
n Gn
λ 2ONU-ID 增益[dB]
1 G 3
2 G 4
… …
n Gn
λ 3ONU-ID 增益[dB]
1 G 4
2 G 3
… …
n Gn
第二种注册方式：OLT通过基于DBA的输出功率控制模块给SOA一个最低增益，例如5dB，然后OLT分配注册时隙，下行发送注册信号，该信号包含此时SOA的增益值。
ONU接收到注册信号后判断是否处于SOA增益最小时的注册时隙，如果是，则上行发送序列号信息，如果不是，则等待SOA增益最小时的注册时隙。
所述上行光信号经过SOA放大，ASE滤波器滤波后由OLT接收机接收，如果OLT正确接收，则记下此时ONU ID和SOA增益值，建立ONU ID和SOA增益关系，如果OLT无法正确接收，则OLT增大SOA增益一个固定的值，例如5dB，再次重复上述步骤。SOA增益增大到某个值后，OLT可以正确接收ONU上行信号，此时，记下ONU ID和SOA增益，建立ONU ID和SOA增益关系，并完成注册。4个通道的注册可以同时进行。单个通道流程图如图5所示。
第二步，OLT根据DBA和链路时延，计算每个ONU光信号到达SOA的时刻，结合注册过程得到的ONU ID和SOA增益关系，建立动态增益调整表，如表8，动态地使用基于DBA的输出功率控制模块调整每个通道SOA增益值，使得每个ONU突发光信号功率在接收机工作范围内。
表8
λ 0ONU-ID 到达OLT时刻 突发时长 增益(dB)
1 t 1 a G 1
2 t 2 b G 2
… … … …
n tn n Gn
λ 1ONU-ID 到达OLT时刻 突发时长 增益(dB)
1 t 1 a G 2
2 t 2 b G 1
… … … …
n tn n Gn
λ 2ONU-ID 到达OLT时刻 突发时长 增益(dB)
1 t 1 a G 3
2 t 2 b G 4
… … … …
n tn n Gn
λ 3ONU-ID 到达OLT时刻 突发时长 增益(dB)
1 t 1 a G 4
2 t 2 b G 3
… … … …
n tn n Gn
可选地，在注册阶段，OLT可以根据接收到的ONU光功率微调SOA增益，使上行光功率经过SOA放大后达到OLT接收机的最佳接收功率，比如-18dBm，再记下此时ONU ID和SOA增益，使每个ONU都有一个一对一的SOA增益，这样，每个ONU的上行光信号都能放大到一致的OLT最佳接收功率。
示例2
本示例和上述示例1类似，不同点为通过调整衰减来调整OLT接收机接收功率。如图14所示，在该架构下，每路SOA实际增益＝每路SOA固定增益-每路VOA衰减(式1)
基于DBA的输出功率控制模块可以由存储器，控制器和驱动器组成，驱动器调整VOA衰减。
第一步，建立ONU ID和VOA衰减关系。
第一种ONU注册方式：SOA工作在固定增益，OLT分段分配注册时隙，每个时隙VOA有一个预分配的衰减，这个预分配的衰减根据可能入射到SOA的功率范围和OLT接收机接收光功率范围设置。
比如，假设系统动态范围为20dB，SOA工作在20dB固定增益，入射SOA的光功率范围为[-40dBm,-20dBm]，OLT接收机接收功率范围为[-28dBm,-8dBm]，那么可以分段分配两个注册时隙，每个注册时隙对应的VOA预分配的衰减值分别为10dB和5dB，这样入射SOA功率为[-40dBm,-30dBm]对应的ONU可以在VOA衰减为5dB的时隙注册，入射SOA功率为[-30dBm,-20dBm]对应的ONU可以在VOA衰减为10dB的时隙注册。
在某个注册时隙，OLT通过基于DBA的输出功率控制模块分配给VOA一个衰减并发送下行信号，该信号包含OLT的发射功率信息并通知符合要求的ONU发送上行信号。
所述符合要求的ONU为ONU发射功率减去上行链路衰减后的值，即入射SOA的功率值，在这个时隙规定的功率范围内。ONU已知OLT的发射光功率，ONU根据接收到的下行光信号功率计算出上行链路衰减，所述上行链路衰减为OLT发射光功率减去ONU接收到的下行光信号功率值，然后ONU根据自己发射机的发射光功率减去上行链路衰减的值判断到上行到达SOA的光功率是否符合这一分配时隙的功率要求，如果不符合，则等待下一个分配时隙，反之，如果符合，则上行发送ONU序列号开始注册，上行信号经过固定增益的SOA放大再经过滤波器过滤ASE噪 声再经过VOA衰减，接收机接收信号，测量其光功率，并将光信号转换为电信号传给MAC。OLT记下此时VOA的衰减值和ONU的ID，完成注册，并建立ONU ID和VOA衰减关系。4个通道注册过程可以同时进行。单个通道流程图如图8所示。
建立的ONU ID和VOA衰减形式如表9所示。
表9
λ 0ONU-ID 衰减[dB] 实际增益[dB]
1 A 1 G λ0-A 1
2 A 2 G λ0-A 2
… … …
n An G λ0-An
λ 1ONU-ID 衰减[dB] 实际增益[dB]
1 A 2 G λ1-A 2
2 A 1 G λ1-A 1
… … …
n An G λ1-An
λ 2ONU-ID 衰减[dB] 实际增益[dB]
1 A 3 G λ2-A 3
2 A 4 G λ2-A 4
… … …
n An G λ2-An
λ 3ONU-ID 衰减[dB] 实际增益[dB]
1 A 4 G λ3-A 4
2 A 3 G λ3-A 3
… … …
n An G λ3-An
第二种注册方式：OLT通过基于DBA的输出功率控制模块给VOA一个最大衰减，例如10dB，然后OLT分配注册时隙，下行发送注册信号，该信号包含此时SOA的实际增益值(式1)。
ONU接收到注册信号后判断是否处于SOA实际增益最小时的注册时隙，如果是，则上行发送序列号信息，如果不是，则等待SOA实际增益最小时的注册时隙。
所述上行光信号经过SOA放大，ASE滤波器滤波，VOA衰减后由OLT接收机接收，如果OLT正确接收，则记下此时ONU ID和VOA衰减值，建立ONU ID和VOA衰减关系，如果OLT无法正确接收，则OLT减小VOA衰减一个固定的值，例如5dB，再次重复上述步骤。VOA衰减减小到某个值后，OLT可以正确接收ONU上行信号，此时，记下ONU ID和VOA衰减，建立ONU ID和VOA衰减关系，并完成注册。4个通道注册可以同时进行。单个通道流程图如图9所示。
第二步，OLT根据DBA和链路时延，计算每个ONU光信号到达VOA的时刻，结合注册过程得到的ONU ID和VOA衰减关系，建立动态增益调整表，如表10，动态地使用基于DBA的输出功率控制模块调整VOA的衰减值，使得每个ONU突发光信号功率趋于一致。
表10
Figure PCTCN2018078245-appb-000003
Figure PCTCN2018078245-appb-000004
可选地，在注册阶段，OLT可以根据接收到的ONU光功率微调VOA衰减，使上行光功率经过SOA放大和VOA衰减后达到OLT接收机的最佳接收功率，比如-18dBm，再记下此时ONU ID和VOA衰减，使每个ONU都有一个一对一的VOA衰减，这样，每个ONU的上行光信号都能放大到一致的OLT最佳接收功率。
示例3
与示例1、2类似，不同点为通过同时调整SOA增益和VOA衰减来 调整OLT接收机接收功率。这样做的优点是降低了SOA和VOA的调节范围要求，如图14所示的架构，在该架构下，每路SOA实际增益＝每路SOA增益-每路VOA衰减(式2)。
基于DBA的输出功率控制模块可以由存储器，控制器，驱动器组成，驱动器调整SOA增益和VOA衰减。
第一步，建立ONU ID和SOA增益、VOA衰减关系。
第一种ONU注册方式：OLT分段分配注册时隙，每个时隙SOA有一个预分配的增益，VOA有一个预分配的衰减，这两个值的差值统称为SOA实际增益。
这个预分配的实际增益根据可能入射到SOA的功率范围和OLT接收机接收光功率范围设置。比如，假设系统动态范围为20dB，入射SOA的光功率范围为[-40dBm,-20dBm]，OLT接收机接收功率范围为[-28dBm,-8dBm]，那么可以分段分配两个注册时隙，每个注册时隙对应的SOA预分配的实际增益值分别为10dB和15dB，对应地，当实际增益值为10dB时，SOA增益可以是15dB，VOA衰减可以是5dB；当实际增益值为15dB时，SOA增益可以是17dB，VOA衰减可以是2dB，这样原本单独调节SOA或者VOA需要5dB的调节范围，同时调节SOA和VOA可以将范围缩小到2dB和3dB。
入射SOA功率为[-40dBm,-30dBm]对应的ONU可以在SOA实际增益为5dB的时隙注册，入射SOA功率为[-30dBm,-20dBm]对应的ONU可以在SOA实际功率为10dB的时隙注册。
在某个注册时隙，OLT通过基于DBA的输出功率控制模块分配给SOA一个增益，VOA一个衰减并发送下行信号，该信号包含OLT的发射功率信息并通知符合要求的ONU发送上行信号。
所述符合要求的ONU为ONU发射功率减去上行链路衰减后的值，即入射SOA的功率值，在这个时隙规定的功率范围内。ONU已知OLT的发射光功率，ONU根据接收到的下行光信号功率计算出上行链路衰减， 所述上行链路衰减为OLT发射光功率减去ONU接收到的下行光信号功率值，然后ONU根据自己发射机的发射光功率减去上行链路衰减的值判断到上行到达SOA的光功率是否符合这一分配时隙的功率要求，如果不符合，则等待下一个分配时隙，反之，如果符合，则上行发送ONU序列号开始注册，上行信号经过SOA放大再经过滤波器过滤ASE噪声再经过VOA衰减后，接收机接收过滤的信号，测量其光功率，并将光信号转换为电信号传给MAC。OLT记下此时SOA增益值，VOA的衰减值和ONU的ID，完成注册，并建立ONU ID和SOA增益和VOA衰减关系。4个通道可以同时注册。单个通道注册流程图如图10所示。
建立的ONU ID和SOA增益、VOA衰减形式如表11所示。
表11
λ 0ONU-ID SOA增益[dB] VOA衰减[dB] 实际增益[dB]
1 G 1 A 1 G 1-A 1
2 G 2 A 2 G 2-A 2
… … … …
n Gn An Gn-An
λ 1ONU-ID SOA增益[dB] VOA衰减[dB] 实际增益[dB]
1 G 2 A 2 G 2-A 2
2 G 1 A 1 G 1-A 1
… … … …
n Gn An Gn-An
λ 2ONU-ID SOA增益[dB] VOA衰减[dB] 实际增益[dB]
1 G 3 A 3 G 3-A 3
2 G 4 A 4 G 4-A 4
… … … …
n Gn An Gn-An
λ 3ONU-ID SOA增益[dB] VOA衰减[dB] 实际增益[dB]
1 G 4 A 4 G 4-A 4
2 G 3 A 3 G 3-A 3
… … … …
n Gn An Gn-An
第二种注册方式：OLT通过基于DBA的输出功率控制模块给SOA一个实际最小增益，例如5dB，这个实际增益可以是SOA增益为10dB，VOA衰减为5dB。然后OLT分配注册时隙，下行发送注册信号，该信号包含此时SOA的实际增益值(式2)。ONU接收到注册信号后判断是否处于SOA实际增益最小时的注册时隙，如果是，则上行发送序列号信息，如果不是，则等待SOA实际增益最小时的注册时隙。
所述上行光信号经过SOA放大，ASE滤波器滤波，VOA衰减后由OLT接收机接收，如果OLT正确接收，则记下此时ONU ID和和SOA增益值和VOA衰减值，建立ONU ID和SOA增益和VOA衰减关系，如果OLT无法正确接收，则OLT增大SOA实际增益一个固定的值，例如5dB，例如可以通过将SOA增益增大到13dB，VOA衰减减小到3dB实现。然后再次重复上述步骤。
SOA实际增益增大到某个值后，OLT可以正确接收ONU上行信号，此时，记下ONU ID和SOA增益和VOA衰减，建立ONU ID和SOA增益和VOA衰减关系，并完成注册。流程图如图11所示。
第二步，OLT根据DBA和链路时延，计算每个ONU光信号到达SOA的时刻，结合注册过程得到的ONU ID和SOA增益、VOA衰减关系，建立动态增益调整表，如表12，动态地使用基于DBA的输出功率控制模块SOA增益和VOA的衰减值，使得每个ONU突发光信号功率趋于一致。
表12
Figure PCTCN2018078245-appb-000005
可选地，在注册阶段，OLT可以根据接收到的ONU光功率微调SOA增益和VOA衰减，使上行光功率经过SOA放大和VOA衰减后达到OLT接收机的最佳接收功率，比如-18dBm，再记下此时ONU ID和SOA增益和VOA衰减，使每个ONU都有一个一对一的SOA增益和VOA衰减，这样，每个ONU的上行光信号都能放大到一致的OLT最佳接收功率。
示例4
这个实施例和示例二类似，不同点为上行信号经过一个共有的SOA放大，经过WDM(全称为Wavelenth Division Multiplexing，波分复用)分路和滤波后，每路信号再经过VOA衰减，使衰减后的信号光功率在接收机的接收范围内。如图15所示，本实施例减少了SOA的数量。每路SOA实际增益＝共有SOA固定增益-每路VOA衰减(式3)。
基于DBA的输出功率控制模块可以由存储器，控制器和驱动器组成，驱动器调整VOA衰减。
第一步，建立ONU ID和VOA衰减关系。
第一种ONU注册方式，共有SOA工作在固定增益，对于每个通道，OLT分段分配注册时隙，每个时隙VOA有一个预分配的衰减，这个预分配的衰减根据可能入射到SOA的功率范围和OLT接收机接收光功率范围设置。
比如，对于单个通道，假设系统动态范围为20dB，共有SOA工作在20dB固定增益，入射SOA的光功率范围为[-40dBm,-20dBm]，OLT接收机接收功率范围为[-28dBm,-8dBm]，那么可以分段分配两个注册时隙，每个注册时隙对应的VOA预分配的衰减值分别为10dB和5dB，这样入射SOA功率为[-40dBm,-30dBm]对应的ONU可以在VOA衰减为5dB的时隙注册，入射SOA功率为[-30dBm,-20dBm]对应的ONU可以在VOA衰减为10dB的时隙注册。不同通道入射SOA的光功率不一致时，由于VOA在每个通道上单独调节，所以SOA可以固定增益。
在某个注册时隙，OLT通过基于DBA的输出功率控制模块分配给 VOA一个衰减并发送下行信号，该信号包含OLT的发射功率信息并通知符合要求的ONU发送上行信号。
所述符合要求的ONU为ONU发射功率减去上行链路衰减后的值，即入射SOA的功率值，在这个时隙规定的功率范围内。ONU已知OLT的发射光功率，ONU根据接收到的下行光信号功率计算出上行链路衰减，所述上行链路衰减为OLT发射光功率减去ONU接收到的下行光信号功率值，然后ONU根据自己发射机的发射光功率减去上行链路衰减的值判断到上行到达SOA的光功率是否符合这一分配时隙的功率要求，如果不符合，则等待下一个分配时隙，反之，如果符合，则上行发送ONU序列号开始注册，上行信号经过固定增益的SOA放大再经过滤波器过滤ASE噪声再经过VOA衰减，接收机接收信号，测量其光功率，并将光信号转换为电信号传给MAC。OLT记下此时VOA的衰减值和ONU的ID，完成注册，并建立ONU ID和VOA衰减关系。4个通道注册过程可以同时进行。单个通道流程图如图8所示。建立的ONU ID和VOA衰减形式如表13所示。
表13
λ 0ONU-ID 衰减[dB] 实际增益[dB]
1 A 1 G share-A 1
2 A 2 G share-A 2
… … …
n An Gshare-An
λ 1ONU-ID 衰减[dB] 实际增益[dB]
1 A 2 G share-A 2
2 A 1 G share-A 1
… … …
n An Gshare-An
λ 2ONU-ID 衰减[dB] 实际增益[dB]
1 A 3 G share-A 3
2 A 4 G share-A 4
… … …
n An G share-An
λ 3ONU-ID 衰减[dB] 实际增益[dB]
1 A 4 G share-A 4
2 A 3 G share-A 3
… … …
n An Gshare-An
第二种注册方式：OLT通过基于DBA的输出功率控制模块给VOA一个最大衰减，例如10dB，然后OLT分配注册时隙，下行发送注册信号，该信号包含此时SOA的实际增益值(式3)。
ONU接收到注册信号后判断是否处于SOA实际增益最小时的注册时隙，如果是，则上行发送序列号信息，如果不是，则等待SOA实际增益最小时的注册时隙。
所述上行光信号经过SOA放大，ASE滤波器滤波，VOA衰减后由OLT接收机接收，如果OLT正确接收，则记下此时ONU ID和VOA衰减值，建立ONU ID和VOA衰减关系，如果OLT无法正确接收，则OLT减小VOA衰减一个固定的值，例如5dB，再次重复上述步骤。VOA衰减减小到某个值后，OLT可以正确接收ONU上行信号，此时，记下ONU ID和VOA衰减，建立ONU ID和VOA衰减关系，并完成注册。4个通道注册可以同时进行。单个通道流程图如图9所示。
第二步，OLT根据DBA和链路时延，计算每个ONU光信号到达VOA的时刻，结合注册过程得到的ONU ID和VOA衰减关系，建立动态增益 调整表，如表14，动态地使用基于DBA的输出功率控制模块调整VOA的衰减值，使得每个ONU突发光信号功率趋于一致。
表14
Figure PCTCN2018078245-appb-000006
Figure PCTCN2018078245-appb-000007
可选地，在注册阶段，OLT可以根据接收到的ONU光功率微调VOA衰减，使上行光功率经过SOA放大和VOA衰减后达到OLT接收机的最佳接收功率，比如-18dBm，再记下此时ONU ID和VOA衰减，使每个ONU都有一个一对一的VOA衰减，这样，每个ONU的上行光信号都能放大到一致的OLT最佳接收功率。
示例5
在本示例中，如图16所示，4个通道由一个SOA进行第一步放大，然后每路信号经过SOA第二步放大，滤波，衰减，然后接收机接收，功率控制模块根据DBA控制每路SOA增益和VOA衰减，使接收机接收光功率在接收机工作范围内。本示例与示例3类似，不同点为上行信号在WDM分波前由一个共有的SOA进行第一步放大，后续再在每个通道上进行SOA放大和VOA衰减。
整体系统如图17所示，上行信号的放大可以根据上述不同实施例灵活选择。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例所述的方法。
实施例2
在本实施例中还提供了一种光信号的功率控制装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图18是根据本发明实施例的光信号的功率控制装置的结构框图，如图18所示，该装置包括：
1)获取模块182，设置为获取各光网络单元ONU的上行光信号到达光信号放大器的不同时刻；
2)建立模块184，设置为建立该ONU ID与该上行光信号的功率控制因子之间的对应关系；
3)控制模块186，设置为根据该不同时刻和该对应关系，对该上行光信号进行功率控制。
可选地，在本实施例中，上述光信号的放大装置的应用场景包括但并不限于：无源光网络(Passive Optical Network，简称为PON)，在该应用场景下，获取各光网络单元ONU的上行光信号到达光信号放大器或可调光衰减器的不同时刻；建立该ONU ID与该上行光信号的功率控制因子之间的对应关系；根据该不同时刻和该对应关系，对该上行光信号进行功率控制，使得ONU的上行突发信号放大到OLT接收机能够接收的范围，进而解决了相关技术中光网络单元ONU上行突发信号放大的均衡问题，达到了降低OLT接收机的接收功率范围要求的技术效果。
需要说明的是，在本实施例中，光信号放大器的个数包括但并限于：一个多个；可调光衰减器的个数包括但并限于：一个多个。
可选地，在本实施例中，上述光信号放大器主要以半导体放大器SOA为例进行说明。
可选地，上述功率控制因子包括以下至少之一：光信号放大器的增益、可调光衰减器的衰减。
图19是根据本发明实施例的光信号的放大装置的结构框图(一)，如图19所示，建立模块184包括：
1)第一分配单元192，设置为在该功率控制因子为该光信号放大器的增益时分配注册时隙，并发送下行注册信号；
2)第一建立单元194，设置为在ONU接收到该下行注册信号且判断满足该注册时隙的功率要求时，开始注册并建立该ONU ID和光信号放大器的增益之间的对应关系。
图20是根据本发明实施例的光信号的放大装置的结构框图(二)，如图20所示，建立模块184包括：
1)第二分配单元202，设置为在该功率控制因子为该光信号放大器的增益时分配注册时隙，并发送下行注册信号，其中，该下行注册信号中包含光信号放大器的增益信息；
2)第一增加单元204，设置为在ONU接收到该下行注册信号且判断处于光信号放大器增益最小注册时隙时，增大光信号放大器增益直至正确接收ONU发送的序列号；
3)第二建立单元206，设置为建立该ONU ID和光信号放大器增益之间的对应关系。
图21是根据本发明实施例的光信号的放大装置的结构框图(三)，如图21所示，建立模块184包括：
1)第三分配单元212，设置为在该功率控制因子为可调光衰减器的衰减时分配注册时隙，并发送下行注册信号，其中，该注册时隙预分配一个衰减值；
2)第三建立单元214，设置为在ONU接收到该下行注册信号且判断符合该注册时隙的功率要求时，开始注册并建立ONU ID和可调光衰减器之间的衰减关系。
图22是根据本发明实施例的光信号的放大装置的结构框图(四)，如 图22所示，建立模块184包括：
1)第一设置单元222，设置为在该功率控制因子为可调光衰减器的衰减时设置可调光衰减器的衰减为最大；
2)第四分配单元224，设置为分配注册时隙，并发送下行注册信号，其中，该下行注册信号中包含可调光衰减器的衰减信息；
3)减少单元226，设置为在ONU接收到该下行注册信号且判断处于光信号放大器实际增益最小注册时隙时，减少可调光衰减器的衰减直至正确接收ONU发送的序列号；
4)第四建立单元228，设置为建立ONU ID和可调光衰减器之间的衰减关系。
图23是根据本发明实施例的光信号的放大装置的结构框图(五)，如图23所示，建立模块184包括：
1)第五分配单元232，设置为在该功率控制因子为光信号放大器的增益和可调光衰减器的衰减时分配注册时隙，并发送下行注册信号，其中，在该注册时隙光信号放大器设置有一个预分配的增益、可调光衰减器设置有一个预分配的衰减；
2)第五建立单元234，设置为在ONU接收到该下行注册信号且判断符合该注册时隙的功率要求时，开始注册并建立ONU ID、光信号放大器增益以及可调光衰减器衰减之间的对应关系。
图24是根据本发明实施例的光信号的放大装置的结构框图(六)，如图24所示，建立模块184包括：
1)第二设置单元242，设置为在该功率控制因子为光信号放大器的增益和可调光衰减器的衰减时，设置光信号放大器的实际增益最小；
2)第六分配单元244，设置为分配注册时隙，并发送下行注册信号，其中，该下行注册信号包括光信号放大器实际增益信息；
3)第二增加单元246，设置为在ONU接收到该下行注册信号且判断 处于光信号放大器实际增益最小注册时隙时，增大光信号放大器增益直至正确接收ONU发送的序列号；
4)第六建立单元248，设置为建立ONU ID、光信号放大器增益以及可调光衰减器衰减之间的对应关系。
可选地，该光信号放大器或该可调光衰减器的个数为多个。在该光信号放大器或该可调光衰减器的个数为多个时，该对应关系为多个，其中，该多个对应关系分别为每一路ONU ID和对应的上行光信号的功率控制因子之间的关系。
可选地，在该上行光信号到达该多个光信号放大器和/或该可调光衰减器之前，该上行光信号经由公共光信号放大器被执行相应的功率控制。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。
实施例3
本发明的实施例还提供了一种光线路终端OLT，包括上述实施例2的装置。
实施例4
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
S1，获取各光网络单元ONU的上行光信号到达光信号放大器或可调光衰减器的不同时刻；
S2，建立该ONU ID与该上行光信号的功率控制因子之间的对应关系；
S3，根据该不同时刻和该对应关系，对该上行光信号进行功率控制。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介 质。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行上述步骤S1、S2以及S3。
可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
本发明的实施例还提供了一种电子装置，包括存储器和处理器，该存储器中存储有计算机程序，该处理器被设置为运行计算机程序以执行上述任一项方法实施例中的步骤。
可选地，上述电子装置还可以包括传输设备以及输入输出设备，其中，该传输设备和上述处理器连接，该输入输出设备和上述处理器连接。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
如上所述，本发明实施例提供的一种光信号的功率控制方法、装置及光线路终端具有以下有益效果：解决了相关技术中光网络单元ONU上行 突发信号放大的均衡问题，达到了降低OLT接收机的接收功率范围要求的技术效果。

Claims (25)

  1. 一种光信号的功率控制方法，包括：
    获取各光网络单元ONU的上行光信号到达光信号放大器或可调光衰减器的不同时刻；
    建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系；
    根据所述不同时刻和所述对应关系，对所述上行光信号进行功率控制。
  2. 根据权利要求1所述的方法，其中，所述功率控制因子包括以下至少之一：
    光信号放大器的增益、可调光衰减器的衰减。
  3. 根据权利要求2所述的方法，其中，在所述功率控制因子为所述光信号放大器的增益时，建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系包括：
    分配注册时隙，并发送下行注册信号；
    在ONU接收到所述下行注册信号且判断满足所述注册时隙的功率要求时，开始注册并建立所述ONU ID和光信号放大器的增益之间的对应关系。
  4. 根据权利要求2所述的方法，其中，在所述功率控制因子为所述光信号放大器的增益时，建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系包括：
    分配注册时隙，并发送下行注册信号，其中，所述下行注册信号中包含光信号放大器的增益信息；
    在ONU接收到所述下行注册信号且判断处于光信号放大器增益最小注册时隙时，增大光信号放大器增益直至正确接收ONU发送的序 列号；
    建立所述ONU ID和光信号放大器增益之间的对应关系。
  5. 根据权利要求2所述的方法，其中，在所述功率控制因子为可调光衰减器的衰减时，建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系包括：
    分配注册时隙，并发送下行注册信号，其中，所述注册时隙预分配一个衰减值；
    在ONU接收到所述下行注册信号且判断符合所述注册时隙的功率要求时，开始注册并建立ONU ID和可调光衰减器之间的衰减关系。
  6. 根据权利要求2所述的方法，其中，在所述功率控制因子为可调光衰减器的衰减时，建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系包括：
    设置可调光衰减器的衰减为最大；
    分配注册时隙，并发送下行注册信号，其中，所述下行注册信号中包含可调光衰减器的衰减信息；
    在ONU接收到所述下行注册信号且判断处于光信号放大器实际增益最小注册时隙时，减少可调光衰减器的衰减直至正确接收ONU发送的序列号；
    建立ONU ID和可调光衰减器之间的衰减关系。
  7. 根据权利要求2所述的方法，其中，在所述功率控制因子为光信号放大器的增益和可调光衰减器的衰减时，建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系包括：
    分配注册时隙，并发送下行注册信号，其中，在所述注册时隙光 信号放大器设置有一个预分配的增益、可调光衰减器设置有一个预分配的衰减；
    在ONU接收到所述下行注册信号且判断符合所述注册时隙的功率要求时，开始注册并建立ONU ID、光信号放大器增益以及可调光衰减器衰减之间的对应关系。
  8. 根据权利要求2所述的方法，其中，在所述功率控制因子为光信号放大器的增益和可调光衰减器的衰减时，建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系包括：
    设置光信号放大器的实际增益最小；
    分配注册时隙，并发送下行注册信号，其中，所述下行注册信号包括光信号放大器实际增益信息；
    在ONU接收到所述下行注册信号且判断处于光信号放大器实际增益最小注册时隙时，增大光信号放大器增益直至正确接收ONU发送的序列号；
    建立ONU ID、光信号放大器增益以及可调光衰减器衰减之间的对应关系。
  9. 根据权利要求1至8任一项所述的方法，其中，
    所述光信号放大器或所述可调光衰减器的个数为多个。
  10. 根据权利要求9所述的方法，其中，
    在所述上行光信号到达所述多个光信号放大器和/或所述可调光衰减器之前，所述上行光信号经由公共光信号放大器被执行相应的功率控制。
  11. 根据权利要求10所述的方法，其中，在所述光信号放大器或所述可调光衰减器的个数为多个时，所述对应关系为多个，其中，所述多个对应关系分别为每一路ONU ID和对应的上行光信号的功率控制因子之间的关系。
  12. 一种光信号的功率控制装置，包括：
    获取模块，设置为获取各光网络单元ONU的上行光信号到达光信号放大器的不同时刻；
    建立模块，设置为建立所述ONU ID与所述上行光信号的功率控制因子之间的对应关系；
    控制模块，设置为根据所述不同时刻和所述对应关系，对所述上行光信号进行功率控制。
  13. 根据权利要求12所述的装置，其中，所述功率控制因子包括以下至少之一：
    光信号放大器的增益、可调光衰减器的衰减。
  14. 根据权利要求13所述的装置，其中，所述建立模块包括：
    第一分配单元，设置为在所述功率控制因子为所述光信号放大器的增益时分配注册时隙，并发送下行注册信号；
    第一建立单元，设置为在ONU接收到所述下行注册信号且判断满足所述注册时隙的功率要求时，开始注册并建立所述ONU ID和光信号放大器的增益之间的对应关系。
  15. 根据权利要求13所述的装置，其中，所述建立模块包括：
    第二分配单元，设置为在所述功率控制因子为所述光信号放大器的增益时分配注册时隙，并发送下行注册信号，其中，所述下行注册信号中包含光信号放大器的增益信息；
    第一增加单元，设置为在ONU接收到所述下行注册信号且判断处于光信号放大器增益最小注册时隙时，增大光信号放大器增益直至正确接收ONU发送的序列号；
    第二建立单元，设置为建立所述ONU ID和光信号放大器增益之间的对应关系。
  16. 根据权利要求13所述的装置，其中，所述建立模块包括：
    第三分配单元，设置为在所述功率控制因子为可调光衰减器的衰减时分配注册时隙，并发送下行注册信号，其中，所述注册时隙预分配一个衰减值；
    第三建立单元，设置为在ONU接收到所述下行注册信号且判断符合所述注册时隙的功率要求时，开始注册并建立ONU ID和可调光衰减器之间的衰减关系。
  17. 根据权利要求13所述的装置，其中，所述建立模块包括：
    第一设置单元，设置为在所述功率控制因子为可调光衰减器的衰减时设置可调光衰减器的衰减为最大；
    第四分配单元，设置为分配注册时隙，并发送下行注册信号，其中，所述下行注册信号中包含可调光衰减器的衰减信息；
    减少单元，设置为在ONU接收到所述下行注册信号且判断处于光信号放大器实际增益最小注册时隙时，减少可调光衰减器的衰减直至正确接收ONU发送的序列号；
    第四建立单元，设置为建立ONU ID和可调光衰减器之间的衰减关系。
  18. 根据权利要求13所述的装置，其中，所述建立模块包括：
    第五分配单元，设置为在所述功率控制因子为光信号放大器的增益和可调光衰减器的衰减时分配注册时隙，并发送下行注册信号，其中，在所述注册时隙光信号放大器设置有一个预分配的增益、可调光衰减器设置有一个预分配的衰减；
    第五建立单元，设置为在ONU接收到所述下行注册信号且判断符合所述注册时隙的功率要求时，开始注册并建立ONU ID、光信号放大器增益以及可调光衰减器衰减之间的对应关系。
  19. 根据权利要求13所述的装置，其中，所述建立模块包括：
    第二设置单元，设置为在所述功率控制因子为光信号放大器的增益和可调光衰减器的衰减时，设置光信号放大器的实际增益最小；
    第六分配单元，设置为分配注册时隙，并发送下行注册信号，其中，所述下行注册信号包括光信号放大器实际增益信息；
    第二增加单元，设置为在ONU接收到所述下行注册信号且判断处于光信号放大器实际增益最小注册时隙时，增大光信号放大器增益直至正确接收ONU发送的序列号；
    第六建立单元，设置为建立ONU ID、光信号放大器增益以及可调光衰减器衰减之间的对应关系。
  20. 根据权利要求12至19任一项所述的装置，其中，所述光信号放大器或所述可调光衰减器的个数为多个。
  21. 根据权利要求20所述的装置，其中，
    在所述上行光信号到达所述多个光信号放大器和/或所述可调光衰减器之前，所述上行光信号经由公共光信号放大器被执行相应的功率控制。
  22. 根据权利要求21所述的装置，其中，在所述光信号放大器或所述可调光衰减器的个数为多个时，所述对应关系为多个，其中，所述多个对应关系分别为每一路ONU ID和对应的上行光信号的功率控制因子之间的关系。
  23. 一种光线路终端OLT，包括：如权利要求12至22任一项所述的装置。
  24. 一种存储介质，所述存储介质中存储有计算机程序，其中，所述计算机程序被设置为运行时执行所述权利要求1至11任一项中所述的方法。
  25. 一种电子装置，包括存储器和处理器，所述存储器中存储有计算机程序，所述处理器被设置为运行所述计算机程序以执行所述权利要求1至11任一项中所述的方法。
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