WO2015100520A1 - 检测上行光信号的功率的方法、装置、光线路终端和光网络系统 - Google Patents

检测上行光信号的功率的方法、装置、光线路终端和光网络系统 Download PDF

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Publication number
WO2015100520A1
WO2015100520A1 PCT/CN2013/090828 CN2013090828W WO2015100520A1 WO 2015100520 A1 WO2015100520 A1 WO 2015100520A1 CN 2013090828 W CN2013090828 W CN 2013090828W WO 2015100520 A1 WO2015100520 A1 WO 2015100520A1
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WO
WIPO (PCT)
Prior art keywords
uplink
optical
signal
uplink optical
power
Prior art date
Application number
PCT/CN2013/090828
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English (en)
French (fr)
Inventor
曾小飞
李三中
郑刚
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP13900833.8A priority Critical patent/EP3065312B1/en
Priority to PCT/CN2013/090828 priority patent/WO2015100520A1/zh
Priority to ES13900833.8T priority patent/ES2669893T3/es
Priority to CN201380002470.5A priority patent/CN104981990B/zh
Publication of WO2015100520A1 publication Critical patent/WO2015100520A1/zh
Priority to US15/196,480 priority patent/US9866317B2/en

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Classifications

    • 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
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07955—Monitoring or measuring power
    • 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
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/08—Time-division multiplex systems

Definitions

  • the present invention relates to the field of communications, and more particularly to a method, apparatus, optical line terminal, and optical network system for detecting power of an upstream optical signal in the field of communications. Background technique
  • an Optical Line Terminal In a Gigabit-capable Passive Optical Networks (GPON) system, an Optical Line Terminal (“OLT”) device can be associated with one or more An optical network terminal (Optical Network Terminal) is called an "ONT” or an optical network unit (“OCU”). (For convenience of description, the ONT will be replaced by an ONT and/or an ONU. Description).
  • the GPON system is a Time Division Multiplexing (TDM) system.
  • TDM Time Division Multiplexing
  • the OLT transmits downlink information to all ONTs connected to the OLT through optical signals having a fixed frequency or wavelength, and each ONT can determine the information sent by the OLT to itself according to its own identity information.
  • each ONT multiplexes the rules of the upstream optical path bandwidth according to time division, that is, the ONT emits light in a specific time slot according to the dynamic bandwidth allocation (Dynamic Bandwidth Allocation, "DBA") scheduling mechanism of the OLT.
  • DBA Dynamic Bandwidth Allocation
  • an OLT optical module with a rating of B+ (CLASS B+ ) has an emission power of 1.5 to 5 dBm and a receiving sensitivity of ⁇ -28 dBm.
  • the actual power of the received optical signal is less than -28dBm, it may affect the stable operation of the system, and the error is light, and the line is dropped. Therefore, if the system can detect the power level of the optical signal actually received by the optical module in time, the robustness of the network can be known, and an early warning can be made when necessary.
  • optical Distribution Network Optical Distribution Network
  • ODN optical Distribution Network
  • CLASS B+ optical module rated B+
  • the robustness of the network can be known, so that early warning can be made when necessary.
  • the way the system checks the actual attenuation of the ODN is: Do not detect the difference between the transmitted optical power of the OLT or the ONT optical module and the optical power actually received by the opposite end (ONT or OLT) optical module, so that the attenuation of the ODN can be determined.
  • the trigger signal may be output when the specific ONT sends the uplink optical signal, and the duration of the trigger signal is the same as the duration of the uplink signal sent by the specific ONT, that is, The uplink duration corresponding to the uplink bandwidth of the uplink optical signal is the same, and the trigger signal is used to trigger the internal resistance of the OLT (Resistor Capacitor, the tube is called "RC") circuit for charging, thereby receiving the uplink optical signal received by the OLT. The power is detected.
  • the OLT Resistor Capacitor
  • Embodiments of the present invention provide a method, an apparatus, an optical line terminal, and an optical network system for detecting power of an uplink optical signal, which can improve power measurement accuracy and repeatability of an uplink optical signal.
  • the first aspect provides a method for detecting power of an uplink optical signal, where the method includes: generating, for each of the plurality of uplink optical signals to be detected, each of the uplink optical signals for detecting The trigger signal of the optical power, the trigger signal of each of the uplink optical signals has the same duration; and the power of each of the uplink optical signals is detected respectively during the duration of the trigger signal of each of the uplink optical signals.
  • the method before the trigger signal for detecting the optical power of each of the uplink optical signals is separately generated, the method further includes: determining, respectively, the multiple uplink lights And determining, by the uplink bandwidth of the uplink optical signal, a plurality of uplink optical signals whose uplink bandwidth is greater than or equal to the bandwidth threshold, and determining the plurality of uplink optical signals to be detected, where The corresponding uplink duration of the threshold is greater than or equal to the duration of the trigger signal.
  • the trigger signal for detecting the optical power of each of the uplink optical signals is separately generated, The method includes: determining, according to a start time of each of the uplink optical signals, a detection time of each of the uplink optical signals; and generating, at each detection time of each of the uplink optical signals, each of the uplink lights A trigger signal for detecting optical power of a signal.
  • the trigger signal for detecting the optical power of each of the uplink optical signals is separately generated, The method includes: determining, according to the termination time and the duration of each of the uplink optical signals, a detection time of each of the uplink optical signals; and generating, at each detection time of each of the uplink optical signals, each of the uplink optical signals A trigger signal for detecting optical power.
  • the second aspect provides an apparatus for detecting power of an uplink optical signal, where the apparatus includes: a generating module, configured to separately generate each of the uplink optical signals for each of the plurality of uplink optical signals to be detected a trigger signal for detecting the optical power of the signal, the trigger signal of each of the uplink optical signals having the same duration; and a detecting module, configured to be used for the duration of the trigger signal of each of the uplink optical signals generated by the generating module And detecting the power of each of the uplink optical signals separately.
  • a generating module configured to separately generate each of the uplink optical signals for each of the plurality of uplink optical signals to be detected a trigger signal for detecting the optical power of the signal, the trigger signal of each of the uplink optical signals having the same duration
  • a detecting module configured to be used for the duration of the trigger signal of each of the uplink optical signals generated by the generating module And detecting the power of each of the uplink optical signals separately.
  • the device further includes: a first determining module, configured to separately determine an uplink bandwidth and a bandwidth of each of the plurality of uplink optical signals a second determining module, configured to determine, by the plurality of uplink optical signals that have an uplink bandwidth greater than or equal to the bandwidth threshold, the uplink optical signals to be detected, where an uplink duration corresponding to the bandwidth threshold Greater than or equal to the duration of the trigger signal.
  • a first determining module configured to separately determine an uplink bandwidth and a bandwidth of each of the plurality of uplink optical signals
  • a second determining module configured to determine, by the plurality of uplink optical signals that have an uplink bandwidth greater than or equal to the bandwidth threshold, the uplink optical signals to be detected, where an uplink duration corresponding to the bandwidth threshold Greater than or equal to the duration of the trigger signal.
  • the generating module includes: a first determining unit, configured to use, according to the each uplink optical signal Determining, respectively, a detection time of each of the uplink optical signals; a first generating unit, configured to generate each of the uplink optical signals respectively at a detection time of each of the uplink optical signals determined by the first determining unit A trigger signal for detecting optical power.
  • the generating module includes: a second determining unit, configured to use, according to the each uplink optical signal The termination time and the duration respectively determine the detection time of each of the uplink optical signals; the second generation unit is configured to generate each of the detection moments of each of the uplink optical signals determined by the second determining unit A trigger signal for detecting optical power of the upstream optical signal.
  • an optical line terminal OLT including a media access control MAC module and an optical module, where the MAC module includes a control module, where the control module is configured to use each of the plurality of uplink optical signals to be detected. And generating, by each of the uplink optical signals, a trigger signal for detecting optical power, where the trigger signal of each uplink optical signal has the same duration; the optical module includes an optical power detection module, and the optical power detection module receives the Control module generated on each of the A trigger signal of the optical signal, and detecting the power of each of the upstream optical signals during the duration of the trigger signal of each of the upstream optical signals.
  • the control module before the control module separately generates a trigger signal for detecting the optical power of each of the uplink optical signals, the control module is further configured to: Determining a relationship between an uplink bandwidth of each of the plurality of uplink optical signals and a bandwidth threshold; determining, by the plurality of uplink optical signals whose uplink bandwidth is greater than or equal to the bandwidth threshold, the plurality of uplink optical signals to be detected, The uplink duration corresponding to the bandwidth threshold is greater than or equal to the duration of the trigger signal.
  • control module is specifically configured to: according to a start time of each of the uplink optical signals, Determining, respectively, a detection time of each of the uplink optical signals; and generating, at each detection time of each of the uplink optical signals, a trigger signal for detecting the optical power of each of the uplink optical signals.
  • control module is specifically configured to: according to the termination time of the each uplink optical signal and the The detection time of each of the uplink optical signals is determined separately; and the trigger signal for detecting the optical power of each of the uplink optical signals is generated at the detection time of each of the uplink optical signals.
  • the MAC module further includes: a dynamic bandwidth allocation DBA module, configured to allocate an uplink bandwidth to an optical network terminal ONT connected to the OLT; and a processing module, configured to send the uplink bandwidth allocated by the DBA module to the ONT through the data channel, and through the data channel Receiving the uplink data sent by the optical module; the processing module is further configured to send a control signal to the optical module to control the optical module to receive or send the optical signal.
  • a dynamic bandwidth allocation DBA module configured to allocate an uplink bandwidth to an optical network terminal ONT connected to the OLT
  • a processing module configured to send the uplink bandwidth allocated by the DBA module to the ONT through the data channel, and through the data channel Receiving the uplink data sent by the optical module
  • the processing module is further configured to send a control signal to the optical module to control the optical module to receive or send the optical signal.
  • the optical module further includes: The control circuit, the driving circuit and the transmitter, wherein the control circuit controls the driving circuit according to the control signal sent by the MAC module to drive the transmitter to send a downlink optical signal to the ONT connected to the OLT.
  • the optical module is further included The receiver and the amplifying circuit, wherein the receiver is configured to receive an uplink optical signal sent by the ONT connected to the OLT, and convert the uplink optical signal into an electrical signal, and output the signal to the amplifying circuit and/or the optical power a detecting module; the amplifying circuit amplifies the electrical signal and outputs the signal to the MAC module; and the optical power detecting module detects the power of the uplink optical signal according to the trigger signal generated by the control module.
  • the optical power detection module includes a charging and discharging circuit, and the trigger signal generated by the charging and discharging circuit in the control module The charging and discharging circuit is charged by the electrical signal during the triggering of the triggering signal; wherein the MAC module is further configured to obtain a voltage value after the charging and discharging circuit is charged, and determine according to the voltage value The power of the upstream optical signal received by the receiver.
  • the optical module further includes The combiner is configured to combine the downlink optical signal transmitted by the optical module and the received uplink optical signal, and output the signal to the trunk optical fiber.
  • a fourth aspect provides an optical line terminal OLT, where the optical line terminal is configured to perform the following method: generating, for each of the plurality of uplink optical signals to be detected, each of the uplink optical signals And a trigger signal for detecting the optical power, the trigger signals of each of the uplink optical signals have the same duration; and the power of each of the uplink optical signals is respectively detected during the duration of the trigger signal of each of the uplink optical signals.
  • the optical line terminal before the optical line terminal separately generates a trigger signal for detecting optical power of each of the uplink optical signals, the optical line terminal is further used to: Performing the following method: determining a relationship between an uplink bandwidth and a bandwidth threshold of each of the plurality of uplink optical signals, and determining, by the uplink bandwidth, a plurality of uplink optical signals that are greater than or equal to the bandwidth threshold. a plurality of uplink optical signals, wherein an uplink duration corresponding to the bandwidth threshold is greater than or equal to a duration of the trigger signal.
  • the optical line terminal separately generates the optical power for detecting the optical power of each of the uplink optical signals
  • the triggering signal includes: determining, according to a start time of each of the uplink optical signals, a detection time of each of the uplink optical signals; and generating, for each detection time of each of the uplink optical signals, each of the uplink optical signals A trigger signal for detecting optical power.
  • the optical line terminal separately generates a trigger signal for detecting the optical power of each of the uplink optical signals, including: determining, according to the termination time of each of the uplink optical signals and the duration, respectively Detection timings of the uplink optical signals; a trigger signal for detecting the optical power of each of the uplink optical signals is generated at the detection timing of each of the uplink optical signals.
  • an apparatus for detecting power of an upstream optical signal comprising a processor, a memory, and a bus system, the processor and the memory being coupled by the bus system, the memory for storing instructions, the processor And executing the instruction stored in the memory, where the processor is configured to: generate, for each of the plurality of uplink optical signals to be detected, a trigger signal for detecting the optical power of each of the uplink optical signals, The trigger signal of each of the uplink optical signals has the same duration; the processor is further configured to: respectively detect the power of each of the uplink optical signals during the duration of the trigger signal of each of the uplink optical signals.
  • the processor before the processor separately generates a trigger signal for detecting optical power of each of the uplink optical signals, the processor is further configured to: Determining a relationship between an uplink bandwidth of each of the plurality of uplink optical signals and a bandwidth threshold; determining, by the plurality of uplink optical signals whose uplink bandwidth is greater than or equal to the bandwidth threshold, the plurality of uplink optical signals to be detected, The uplink duration corresponding to the bandwidth threshold is greater than or equal to the duration of the trigger signal.
  • the processor separately generates a trigger for detecting optical power of each of the uplink optical signals
  • the signal includes: determining, according to a start time of each of the uplink optical signals, a detection time of each of the uplink optical signals; and generating, at each detection time of each of the uplink optical signals, each of the uplink optical signals A trigger signal for detecting optical power.
  • the processor separately generates a trigger for detecting optical power of each of the uplink optical signals
  • the signal includes: determining, according to the termination time and the duration of each of the uplink optical signals, a detection time of each of the uplink optical signals; and generating, at each detection time of each of the uplink optical signals, each of the uplink optical signals A trigger signal for detecting optical power.
  • an optical network system includes: an optical line terminal OLT according to an embodiment of the present invention; at least one optical network terminal ONT; and a beam splitter, wherein the at least one ONT passes the optical splitter Connected to the OLT; the optical line terminal OLT media access control MAC module and optical module, the MAC module includes a control module, and the control module is used to Each of the plurality of uplink optical signals to be detected generates a trigger signal for detecting the optical power of each of the uplink optical signals, where the trigger signals of each of the uplink optical signals have the same duration;
  • the optical module includes an optical power detection module, and the optical power detection module receives the trigger signal of each of the uplink optical signals generated by the control module, and detects each of the trigger signals of each of the uplink optical signals The power of the upstream optical signal.
  • the method, the device, the optical line terminal, and the optical network system for detecting the power of the uplink optical signal in the embodiment of the present invention generate a trigger signal having the same duration for different uplink optical signals to be detected, so that Under the triggering of the trigger signal, the charging time of the charging circuit for optical power detection is the same and fixed, so that the power measurement accuracy and repeatability of the upstream optical signal can be improved.
  • FIG. 1 is a schematic block diagram of an application scenario according to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a method of detecting power of an upstream optical signal according to an embodiment of the present invention.
  • FIG. 3 is another schematic flowchart of a method of detecting power of an uplink optical signal according to an embodiment of the present invention.
  • FIG. 4 is a schematic block diagram of an apparatus for detecting power of an upstream optical signal in accordance with an embodiment of the present invention.
  • Figure 5 is another schematic block diagram of an apparatus for detecting the power of an upstream optical signal in accordance with an embodiment of the present invention.
  • FIG. 6 is a schematic block diagram of a generation module in accordance with an embodiment of the present invention.
  • FIG. 7 is another schematic block diagram of a generation module according to an embodiment of the present invention.
  • Figure 8 is a schematic block diagram of an optical line terminal in accordance with an embodiment of the present invention.
  • FIG 9 is another schematic block diagram of an optical line terminal in accordance with an embodiment of the present invention.
  • FIG. 10 is still another schematic block diagram of an apparatus for detecting power of an upstream optical signal according to an embodiment of the present invention.
  • 11 is a schematic block diagram of an optical network system in accordance with an embodiment of the present invention. detailed description
  • FIG. 1 shows a schematic block diagram of an application scenario according to an embodiment of the present invention.
  • a passive optical network (Passive Optical Network) system may include an optical line terminal OLT located at a central office and an optical network terminal ONT/optical network unit ONU, and an OLT may pass, for example, none.
  • the splitter of the source optical splitter is connected to one or more ONTs/ONUs.
  • a PON system employing time division multiplexing TDM for example, in a GPON system, the duration or bandwidth of different line optical signals can be uniformly distributed by the DBA module of the OLT.
  • data or optical signals carrying data are transmitted from the OLT to
  • the transmission direction of the ONT/ONU is called the downlink direction.
  • the optical signal sent by the OLT to the ONT/ONU is also called the downlink optical signal.
  • the data or the optical signal carrying the data is transmitted from the ONT/ONU to the OLT. It is called the uplink direction.
  • the optical signal sent by the ONT/ONU to the OLT is also called the uplink optical signal.
  • a method and apparatus for detecting power of an uplink optical signal may be applied to a PON system using TDM, for example, a GPON system, a 10G EPON system, or a 10G GPON.
  • TDM for example, a GPON system, a 10G EPON system, or a 10G GPON.
  • the GPON system will be described below as an example, but the present invention is not limited thereto; further, for convenience of description, an ONT will be described instead of the ONT and/or the ONU, but the present invention Not limited to this.
  • the method 100 includes:
  • the apparatus for detecting the power of the uplink optical signal may separately generate each of the plurality of uplink optical signals to be detected. Trigger signals of the uplink optical signals, wherein the trigger signals of each of the uplink optical signals have the same duration; the means for detecting the power of the uplink optical signal may be separately detected during the duration of the trigger signal of each of the upstream optical signals The power of each upstream optical signal. Therefore, the charging circuit for optical power detection included in the device is triggered by the trigger signal, and the time for charging each of the detected upstream optical signals is the same and fixed, thereby improving the uplink optical signal. Power measurement accuracy and repeatability.
  • the method for detecting the power of the uplink optical signal in the embodiment of the present invention generates a trigger signal having the same duration for different uplink optical signals to be detected, so that the optical power is used under the trigger of the trigger signal.
  • the charging time of the detected charging circuit is the same and fixed, so that the power measurement accuracy and repeatability of the upstream optical signal can be improved.
  • the apparatus for detecting the power of the uplink optical signal generates a trigger signal having the same duration, that is, a device generated by the apparatus for detecting the power of the uplink optical signal, for each of the uplink optical signals to be detected.
  • the duration of the trigger signal is fixed and constant, and the duration is not different due to the upstream bandwidth of the upstream optical signal.
  • the duration is fixed and constant is for a particular device that detects the power of the upstream optical signal, ie, for any particular device that detects the power of the upstream optical signal, the device is different
  • the duration of the trigger signal generated by the uplink optical signal is the same, but for different devices that detect the power of the uplink optical signal, the duration of the generated trigger signal may be the same or different.
  • the specific value of the duration of the trigger signal may be preset in the factory for detecting the power of the uplink optical signal, wherein the preferred value of the duration of the trigger signal may be determined in consideration of various factors.
  • the duration of the trigger signal needs to have a relatively long duration to ensure that the detection accuracy is sufficiently high.
  • the time required for the charging circuit included in the device for detecting the power of the upstream optical signal to reach the saturation voltage may be determined as the duration of the trigger signal; for example, the time required for the charging circuit to reach the charging voltage of 80%. Determined as the duration of the trigger signal; for example, the duration of the trigger signal is fixed at 600 ns, and so on. That is, in the embodiment of the present invention, the duration of the trigger signal may be determined by parameters of the charging circuit, for example, by the resistance value and the capacitance value of the charging circuit.
  • V is assumed. Is the initial voltage value of the capacitor Y in the RC circuit; V cc is the maximum voltage value of the capacitor Y; V t is the voltage value after charging the capacitor Y for T charging time; the capacitance value of the capacitor Y is C; the RC circuit
  • the resistance value of the included resistor X is R, then V t can be determined by the following equation (1):
  • V t V 0 + (V cc - V 0 ) x [l - exp (- ⁇ ;)] ( 1 )
  • the charging time T can be determined by the following equation (2):
  • the duration of the trigger signal can be, for example, the above equation (3) ) OK.
  • the duration T of the trigger signal is:
  • the duration of the trigger signal T is 460 ns.
  • the duration of the trigger signal cannot be too long. Otherwise, since the illumination time or the uplink duration of the uplink optical signal needs to be greater than or equal to the fixed duration of the trigger signal, the trigger duration is too long.
  • the signal means that the upstream optical signal to be detected needs to have a large upstream bandwidth. In the actual network, the uplink bandwidth of each ONT is large and small, and the uplink bandwidth allocated when the ONT traffic is small is small. When the traffic of the ONT continues to be small, it may not be possible for a long time. Power detection, which affects the efficiency of the system for power detection of upstream optical signals. Therefore, in order to improve the efficiency of power detection, the duration of the trigger signal ranges, for example, to
  • the duration of the trigger signal ranges from 500 ns to 700 ns, etc., but the invention is not limited thereto.
  • the preferred value of the duration of the trigger signal may also take into account the ease of calibration and the requirements of the manufacturers of various equipment vendors or photoelectric conversion modules, but the invention is not limited thereto.
  • the plurality of uplink optical signals may include an optical signal of an ONT in multiple different uplink frames, and may also include optical signals of multiple ONTs in the same uplink frame, and may also include multiple ONTs.
  • Optical signals of different upstream frames It should be understood that the embodiment of the present invention only uses a plurality of uplink optical signals as an example, but the present invention is not limited thereto.
  • the method for detecting the power of the uplink optical signal according to the present invention may also perform the power of the single uplink optical signal. Detection.
  • the device for detecting the power of the uplink optical signal may generate, for a single uplink optical signal to be detected, a trigger signal for detecting the power of the uplink optical signal, the trigger signal having a duration of a preset value and being one a constant, that is, the duration of the trigger signal is not a value determined according to an uplink duration corresponding to an uplink bandwidth of the uplink optical signal; and the apparatus for detecting the power of the uplink optical signal detects the duration of the trigger signal The power of the upstream optical signal.
  • the method for detecting the power of the uplink optical signal in the embodiment of the present invention generates a trigger signal having the same duration for different uplink optical signals to be detected, so that the optical power is used under the trigger of the trigger signal.
  • the charging time of the detected charging circuit is the same and fixed, so that the power measurement accuracy and repeatability of the upstream optical signal can be improved.
  • the uplink duration corresponding to the uplink bandwidth of the uplink optical signal to be detected needs to be greater than or equal to a fixed duration of the trigger signal, That is, the illumination time of the uplink optical signal to be detected needs to be greater than or equal to the fixed duration of the trigger signal. Therefore, before the power of the uplink optical signal is detected, the uplink optical signal to be detected that meets the requirement may be determined according to the uplink bandwidth of the uplink optical signal.
  • the method further includes:
  • S140 Determine, by using the plurality of uplink optical signals that have an uplink bandwidth greater than or equal to the bandwidth threshold, the uplink optical signals to be detected, where an uplink duration corresponding to the bandwidth threshold is greater than or equal to a duration of the trigger signal. That is, in the embodiment of the present invention, the plurality of uplink optical signals whose uplink bandwidth is greater than or equal to the bandwidth threshold are determined as the plurality of uplink optical signals to be detected, because the uplink duration corresponding to the bandwidth threshold is greater than or equal to the trigger.
  • the duration of the signal is such that the uplink duration corresponding to the uplink bandwidth of the plurality of uplink optical signals to be detected is greater than or equal to the fixed duration of the trigger signal, thereby improving the power measurement accuracy and repeatability of the uplink optical signal.
  • an uplink bandwidth for detection may be allocated to the specific uplink optical signal, where the uplink bandwidth for detection is greater than or equal to the bandwidth threshold. So that the particular upstream optical signal has sufficient uplink duration to enable power detection.
  • the apparatus for detecting the power of the uplink optical signal determines that an uplink bandwidth allocated to the ONT to be detected in consecutive N uplink frames is smaller than a bandwidth threshold, and When N is greater than or equal to the frame threshold, the uplink bandwidth for detection is allocated to the ONT to be detected, the uplink bandwidth for detection is greater than or equal to the bandwidth threshold, and the N is a positive integer.
  • the frame threshold may be preset to 5, that is, at least in consecutive 5 uplink frames, if the uplink bandwidth allocated to the ONT to be detected is less than the bandwidth threshold, the ONT to be detected may be allocated greater than or An upstream bandwidth equal to the bandwidth threshold. Therefore, it is determined that the uplink bandwidth allocated to the ONT to be detected is greater than or equal to the bandwidth threshold, thereby performing power detection of the uplink optical signal.
  • the bandwidth may refer to the amount of data that passes through the unit time.
  • the bandwidth has a correspondence with the duration of the signal. For example, in a GPON system, if an uplink frame is 125 us and the total bandwidth is 1.25 GHz, if the uplink bandwidth allocated by the OLT to the ONT is 10 MHz, the ONT sends the uplink optical signal in the uplink frame for the duration of the uplink optical signal. Lus.
  • the uplink duration corresponding to the bandwidth threshold may indicate the duration of the uplink optical signal whose bandwidth is the bandwidth threshold; for example, in the PON system with the constant uplink rate, corresponding to the bandwidth threshold.
  • the uplink duration may indicate the duration during which the ONT transmits the upstream optical signal when the ONT is allocated a bandwidth equal to the bandwidth threshold. For example, if the bandwidth threshold is 6 MHz, the uplink duration corresponding to the bandwidth threshold is 0.6 us.
  • the plurality of uplink optical signals to be detected may refer to multiple uplink optical signals whose durations corresponding to the uplink bandwidth are greater than or equal to the duration of the trigger signal,
  • the invention is not limited to this.
  • the trigger signal for detecting the optical power of each of the uplink optical signals is separately generated, including:
  • a trigger signal for detecting the optical power of each of the upstream optical signals is generated.
  • the device for detecting the power of the uplink optical signal may determine the detection time of each uplink optical signal by the starting time of each uplink optical signal; the device may also be based on the starting moment.
  • the detection time is determined with the delay value.
  • the device may use the time 10 ns after the start time of each of the upstream optical signals as the detection time of each of the upstream optical signals, but the present invention is not limited thereto.
  • the trigger signal for detecting the optical power of each of the uplink optical signals is separately generated, including:
  • a trigger signal for detecting the optical power of each of the upstream optical signals is generated.
  • the apparatus for detecting the power of the uplink optical signal may determine the detection time based on the termination time of the ONT transmitting the uplink optical signal and the fixed duration of the trigger signal, for example, determining a certain time before the final time as the detection time, so that During the entire period of power detection by the device, the intensity of the upstream optical signal may be non-zero.
  • the end time of the trigger signal is the same as the end time of the uplink optical signal; for example, the detection time is set such that the end time of the trigger signal is 10 ns earlier than the end time of the upstream optical signal.
  • the invention is not limited to this.
  • the apparatus for detecting the power of the uplink optical signal may first determine the magnitude relationship between the uplink bandwidth allocated to the ONT to be detected and the bandwidth threshold to determine whether Power detection can be performed on the ONT to be detected.
  • the device may output a fixed duration trigger signal to the OLT to trigger power detection of the uplink optical signal; when determining that the uplink bandwidth allocated to the ONT is less than the bandwidth threshold, The device may not output a trigger signal to the OLT and does not perform power detection.
  • the DBA module of the OLT can allocate a large uplink bandwidth for detection to the ONT to be detected, so that power detection can be performed, thereby avoiding power failure for a long time due to factors such as less traffic of the ONT.
  • the problem of detection can not only improve the power measurement accuracy and repeatability of the uplink optical signal, but also improve the efficiency of the system for power detection.
  • parameters such as a bandwidth threshold, a fixed duration of a trigger signal, a frame threshold, an uplink bandwidth for detection, and the like are preset values, and may be determined based on various factors, and the present invention is not limited to each A detailed description of the embodiments.
  • the method for detecting the power of the uplink optical signal in the embodiment of the present invention generates a trigger signal having the same duration for different uplink optical signals to be detected, so that the optical power is used under the trigger of the trigger signal.
  • the charging time of the detected charging circuit is the same and fixed, so that the power measurement accuracy and repeatability of the upstream optical signal can be improved.
  • the method for detecting the power of the uplink optical signal according to the embodiment of the present invention is described in detail above with reference to FIG. 1 to FIG. 3 .
  • the power of detecting the uplink optical signal according to the embodiment of the present invention will be described in detail below with reference to FIG. 4 to FIG. 11 .
  • FIG. 4 shows a schematic block diagram of an apparatus 300 for detecting the power of an upstream optical signal in accordance with an embodiment of the present invention.
  • the apparatus 300 includes:
  • the generating module 310 is configured to generate, for each of the plurality of uplink optical signals to be detected, a trigger signal for detecting optical power of each of the uplink optical signals, and a trigger signal of each of the uplink optical signals. Have the same duration;
  • the detecting module 320 is configured to detect the power of each of the uplink optical signals during the duration of the trigger signal of each of the uplink optical signals generated by the generating module 310.
  • the apparatus for detecting the power of the uplink optical signal in the embodiment of the present invention generates a trigger signal having the same duration for different uplink optical signals to be detected, so that the optical power is used under the trigger of the trigger signal.
  • the charging time of the detected charging circuit is the same and fixed, so that the power measurement accuracy and repeatability of the upstream optical signal can be improved.
  • the apparatus 300 for detecting the power of the uplink optical signal generates a trigger signal having the same duration, that is, a trigger generated by the apparatus 300 for detecting the power of the uplink optical signal, for each of the uplink optical signals to be detected.
  • the duration of the signal is fixed and constant, the duration The time does not differ depending on the upstream bandwidth of the upstream optical signal.
  • the duration is fixed and constant is for a particular device that detects the power of the upstream optical signal, ie, for any particular device that detects the power of the upstream optical signal, the device is different
  • the duration of the trigger signal generated by the uplink optical signal is the same, but for different devices that detect the power of the uplink optical signal, the duration of the generated trigger signal may be the same or different.
  • the uplink duration corresponding to the uplink bandwidth of the uplink optical signal to be detected needs to be greater than or equal to a fixed duration of the trigger signal, That is, the illumination time of the uplink optical signal to be detected needs to be greater than or equal to the fixed duration of the trigger signal. Therefore, before the power of the uplink optical signal is detected, the uplink optical signal to be detected that meets the requirement may be determined according to the uplink bandwidth of the uplink optical signal.
  • the apparatus 300 further includes:
  • the first determining module 330 is configured to determine, respectively, a magnitude relationship between an uplink bandwidth and a bandwidth threshold of each of the plurality of uplink optical signals;
  • the second determining module 340 is configured to determine, by using the uplink bandwidth that is greater than or equal to the bandwidth threshold, a plurality of uplink optical signals that are to be detected, where an uplink duration corresponding to the bandwidth threshold is greater than or equal to the The duration of the trigger signal.
  • the plurality of uplink optical signals whose uplink bandwidth is greater than or equal to the bandwidth threshold are determined as the plurality of uplink optical signals to be detected, because the uplink duration corresponding to the bandwidth threshold is greater than or equal to the trigger.
  • the duration of the signal is such that the uplink duration corresponding to the uplink bandwidth of the plurality of uplink optical signals to be detected is greater than or equal to the fixed duration of the trigger signal, thereby improving the power measurement accuracy and repeatability of the uplink optical signal.
  • the generating module 310 includes: a first determining unit 311, configured to separately determine each of the uplink lights according to a starting moment of each of the uplink optical signals The detection time of the signal;
  • the first generating unit 312 is configured to generate, respectively, a trigger signal for detecting optical power of each of the uplink optical signals at the detection time of each of the uplink optical signals determined by the first determining unit 311.
  • the generating module 310 includes:
  • a second determining unit 313, configured to determine, according to the termination time of each of the uplink optical signals and the duration, a detection time of each of the uplink optical signals, respectively;
  • the second generating unit 314 is configured to generate, respectively, a trigger signal for detecting the optical power of each of the uplink optical signals at the detection time of each of the uplink optical signals determined by the second determining unit 313.
  • the apparatus 300 for detecting the power of the uplink optical signal is an OLT.
  • the generating module 310 may be integrated on a Media Access Control (MAC) chip of the OLT. That is, the first determining unit 311 and the first generating unit 312 may be integrated on the MAC chip of the OLT, or the second determining unit 313 and the second generating unit 314 may be integrated on the MAC chip of the OLT.
  • MAC Media Access Control
  • the apparatus for detecting the power of the uplink optical signal may first determine the magnitude relationship between the uplink bandwidth allocated to the ONT to be detected and the bandwidth threshold to determine whether Power detection can be performed on the ONT to be detected.
  • the device may output a fixed duration trigger signal to the OLT to trigger power detection of the uplink optical signal; when determining that the uplink bandwidth allocated to the ONT is less than the bandwidth threshold, The device may not output a trigger signal to the OLT and does not perform power detection.
  • the DBA module of the OLT can allocate a larger uplink bandwidth for detection to the ONT to be detected, so that power detection can be performed. Therefore, the problem that the power detection cannot be performed for a long time due to factors such as the small amount of traffic of the ONT is avoided, thereby not only improving the power measurement accuracy and repeatability of the uplink optical signal, but also improving the efficiency of the system for performing power detection.
  • apparatus 300 for detecting power of an upstream optical signal may correspond to an execution subject of a method according to an embodiment of the present invention, and the above-described sum of respective modules in apparatus 300 Other operations and/or functions are respectively omitted in order to implement the corresponding processes of the respective methods in FIG. 1 to FIG.
  • the apparatus for detecting the power of the uplink optical signal in the embodiment of the present invention generates a trigger signal having the same duration for different uplink optical signals to be detected, so that the optical power is used under the trigger of the trigger signal.
  • the charging time of the detected charging circuit is the same and fixed, so that the power measurement accuracy and repeatability of the upstream optical signal can be improved.
  • FIG. 8 shows a schematic block diagram of an optical line terminal 500 in accordance with an embodiment of the present invention.
  • the optical line terminal OLT 500 includes a medium access control MAC module 510 and an optical module 520, where
  • the MAC module 510 includes a control module 511, and the control module 511 is configured to generate, for each of the plurality of uplink optical signals to be detected, each of the uplink optical signals for detecting
  • the triggering signal of the optical power, the trigger signal of each of the uplink optical signals has the same duration;
  • the optical module 520 includes an optical power detecting module 521, and the optical power detecting module 521 receives the uplink generated by the control module 511.
  • the trigger signal of the optical signal, and the power of each of the uplink optical signals is detected respectively during the duration of the trigger signal of each of the upstream optical signals.
  • the optical line terminal of the embodiment of the present invention generates a trigger signal having the same duration for different uplink optical signals to be detected, so that the charging circuit for optical power detection is triggered by the trigger signal.
  • the charging time is the same and fixed, so that the power measurement accuracy and repeatability of the upstream optical signal can be improved.
  • control module 511 before the control module 511 generates the trigger signal for detecting the optical power of each of the uplink optical signals, the control module 511 is further configured to:
  • the plurality of uplink optical signals whose uplink bandwidth is greater than or equal to the bandwidth threshold are determined as the plurality of uplink optical signals to be detected, wherein an uplink duration corresponding to the bandwidth threshold is greater than or equal to a duration of the trigger signal.
  • control module 511 is specifically configured to: determine, according to a start time of each uplink optical signal, a detection time of each uplink optical signal; At the detection time, a trigger signal for detecting the optical power of each of the upstream optical signals is generated.
  • control module 511 is specifically configured to: determine, according to the termination time and the duration of each of the uplink optical signals, a detection moment of each of the uplink optical signals; At the detection time of the uplink optical signal, a trigger signal for detecting the optical power of each of the uplink optical signals is generated.
  • the MAC module 510 further includes: a dynamic bandwidth allocation DBA module 512, configured to allocate an uplink bandwidth to the optical network terminal ONT connected to the OLT; and
  • the processing module 513 is configured to send the uplink bandwidth allocated by the DBA module 512 to the ONT through the data channel, and receive the uplink data sent by the optical module 520 through the data channel; the processing module 513 is further configured to use the optical module 520 sends a control signal to control the optical module 520 to receive or transmit an optical signal.
  • the optical module 520 further includes: a control circuit 522, a driving circuit 523 and a transmitter 524, wherein the control circuit 522 controls the drive circuit 523 according to a control signal sent by the MAC module 510 to drive the transmitter 524 to transmit a downlink optical signal to the ONT connected to the OLT.
  • the optical module 520 further includes: a receiver 525 and an amplifying circuit 526, where the receiver 525 is configured to receive an uplink optical signal sent by the ONT connected to the OLT, and send the uplink
  • the optical signal is converted into an electrical signal and output to the amplifying circuit 526 and/or the optical power detecting module 521;
  • the amplifying circuit 526 amplifies the electrical signal and outputs the signal to the MAC module 510;
  • the optical power detecting module 521 is configured according to the control module
  • the trigger signal generated by 511 detects the power of the uplink optical signal.
  • the processing module is configured to control the control circuit by using a control signal, so that the driving circuit drives the transmitter to transmit a downlink optical signal; and the processing module is further configured to receive, by using the receiving data channel, the uplink sent by the optical module.
  • Data wherein the uplink data is a photoelectric conversion and an amplified electrical signal after the optical module receives the uplink optical signal, where the control signal is a trigger signal between the control module in the MAC module and the optical power detection module in the optical module. External control signal.
  • the optical power detecting module 521 includes a charging and discharging circuit, and the charging and discharging circuit is triggered by the trigger signal generated by the control module 511, during the duration of the trigger signal, The electrical signal charges the charge and discharge circuit;
  • the MAC module 510 is further configured to obtain a voltage value after the charging and discharging circuit is charged, and determine, according to the voltage value, a power of the uplink optical signal received by the receiver 525.
  • the optical module 520 further includes a combiner 527, and the combiner 527 is configured to transmit the downlink optical signal and the received uplink light of the optical module 520.
  • the signals are combined and output to the backbone fiber.
  • the apparatus for detecting the power of the uplink optical signal may first determine the magnitude relationship between the uplink bandwidth allocated to the ONT to be detected and the bandwidth threshold to determine whether Power detection can be performed on the ONT to be detected.
  • the device may output a fixed duration trigger signal to the OLT to trigger power detection of the uplink optical signal; when determining that the uplink bandwidth allocated to the ONT is less than the bandwidth threshold, The device may not output a trigger signal to the OLT and does not perform power detection.
  • the DBA module of the OLT may specifically allocate a larger amount to the ONT to be detected. Detecting the uplink bandwidth to enable power detection, thereby avoiding the problem that power detection cannot be performed for a long time due to factors such as less traffic of the ONT, thereby improving power measurement accuracy and repeatability of the uplink optical signal, and Improve the efficiency of the system for power detection.
  • the optical line terminal 500 may correspond to an execution body of the method according to an embodiment of the present invention, and may further correspond to the apparatus 300 for detecting the power of the uplink optical signal, and
  • the foregoing and other operations and/or functions of the respective modules in the optical line terminal 500 are respectively omitted in order to implement the corresponding processes of the respective methods in FIG. 1 to FIG.
  • the optical line terminal of the embodiment of the present invention generates a trigger signal having the same duration for different uplink optical signals to be detected, so that the charging circuit for optical power detection is triggered by the trigger signal.
  • the charging time is the same and fixed, so that the power measurement accuracy and repeatability of the upstream optical signal can be improved.
  • the embodiment of the invention further provides an optical line terminal OLT, which is used to perform the following method:
  • the power of each of the upstream optical signals is detected during the duration of the trigger signal of each of the upstream optical signals.
  • the optical line terminal of the embodiment of the present invention generates a trigger signal having the same duration for different uplink optical signals to be detected, so that the charging circuit for optical power detection is triggered by the trigger signal.
  • the charging time is the same and fixed, so that the power measurement accuracy and repeatability of the upstream optical signal can be improved.
  • the optical line terminal before the optical line terminal separately generates a trigger signal for detecting optical power of each of the uplink optical signals, the optical line terminal is further configured to perform the following method:
  • the plurality of uplink optical signals whose uplink bandwidth is greater than or equal to the bandwidth threshold are determined as the plurality of uplink optical signals to be detected, where an uplink duration corresponding to the bandwidth threshold is greater than or equal to a duration of the trigger signal.
  • the optical line terminal separately generates a trigger signal for detecting the optical power of each of the uplink optical signals, including:
  • a trigger signal for detecting the optical power of each of the upstream optical signals is generated.
  • the optical line terminal separately generates a trigger signal for detecting the optical power of each of the uplink optical signals, including:
  • a trigger signal for detecting the optical power of each of the upstream optical signals is generated.
  • the apparatus for detecting the power of the uplink optical signal may first determine the magnitude relationship between the uplink bandwidth allocated to the ONT to be detected and the bandwidth threshold to determine whether Power detection can be performed on the ONT to be detected.
  • the device may output a fixed duration trigger signal to the OLT to trigger power detection of the uplink optical signal; when determining that the uplink bandwidth allocated to the ONT is less than the bandwidth threshold, The device may not output a trigger signal to the OLT and does not perform power detection.
  • the DBA module of the OLT can allocate a larger uplink bandwidth for detection to the ONT to be detected, so that power detection can be performed. Therefore, the problem that the power detection cannot be performed for a long time due to factors such as the small amount of traffic of the ONT is avoided, thereby not only improving the power measurement accuracy and repeatability of the uplink optical signal, but also improving the efficiency of the system for performing power detection.
  • an optical line terminal may correspond to an execution body of a method according to an embodiment of the present invention, and may also correspond to an apparatus 300 and an optical line terminal that detect power of an uplink optical signal.
  • 500, and the above-mentioned and other operations and/or functions of the respective modules in the optical line terminal are respectively omitted in order to implement the corresponding processes of the respective methods in FIG. 1 to FIG.
  • the optical line terminal of the embodiment of the present invention generates a trigger signal having the same duration for different uplink optical signals to be detected, so that the charging circuit for optical power detection is triggered by the trigger signal.
  • the charging time is the same and fixed, which can improve the uplink optical signal Power measurement accuracy and repeatability.
  • an embodiment of the present invention further provides an apparatus 700 for detecting power of an uplink optical signal, where the apparatus 700 includes a processor 710, a memory 720, and a bus system 730, and the processor 710 and the The memory 720 is connected by the bus system 730, where the memory 720 is used to store instructions, and the processor 710 is configured to execute instructions stored in the memory 720.
  • the processor 710 is configured to generate, for each of the plurality of uplink optical signals to be detected, a trigger signal for detecting optical power of each of the uplink optical signals, where each uplink optical signal is generated. Trigger signals have the same duration;
  • the processor 710 is further configured to: detect, according to a duration of the trigger signal of each of the uplink optical signals, a power of each of the uplink optical signals.
  • the apparatus for detecting the power of the uplink optical signal in the embodiment of the present invention generates a trigger signal having the same duration for different uplink optical signals to be detected, so that the optical power is used under the trigger of the trigger signal.
  • the charging time of the detected charging circuit is the same and fixed, so that the power measurement accuracy and repeatability of the upstream optical signal can be improved.
  • the processor 710 may be a central processing unit (Central)
  • the processing unit may also be other general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs), or other programmable Logic devices, discrete gates or transistor logic devices, discrete hardware components, and more.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 720 can include read only memory and random access memory and provides instructions and data to the processor 710. A portion of memory 720 may also include non-volatile random access memory. For example, the memory 720 can also store information of the device type.
  • the bus system 730 can include, in addition to the data bus, a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 730 in the figure.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 710 or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 720, and the processor 710 reads the information in the memory 720, combining the same
  • the hardware completes the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the processor 710 before the processor 710 separately generates a trigger signal for detecting optical power of each of the uplink optical signals, the processor 710 is further configured to:
  • the plurality of uplink optical signals whose uplink bandwidth is greater than or equal to the bandwidth threshold are determined as the plurality of uplink optical signals to be detected, wherein an uplink duration corresponding to the bandwidth threshold is greater than or equal to a duration of the trigger signal.
  • the processor 710 separately generates a trigger signal for detecting optical power of each of the uplink optical signals, including:
  • a trigger signal for detecting the optical power of each of the upstream optical signals is generated.
  • the processor 710 separately generates a trigger signal for detecting optical power of each of the uplink optical signals, including:
  • a trigger signal for detecting the optical power of each of the upstream optical signals is generated.
  • the apparatus for detecting the power of the uplink optical signal may first determine the magnitude relationship between the uplink bandwidth allocated to the ONT to be detected and the bandwidth threshold to determine whether Power detection can be performed on the ONT to be detected.
  • the device may output a fixed duration trigger signal to the OLT to trigger power detection of the uplink optical signal; when determining that the uplink bandwidth allocated to the ONT is less than the bandwidth threshold, The device may not output a trigger signal to the OLT and does not perform power detection.
  • the DBA module of the OLT can allocate a larger uplink bandwidth for detection to the ONT to be detected, so that power detection can be performed. Therefore, the problem that the power detection cannot be performed for a long time due to factors such as the small amount of traffic of the ONT is avoided, thereby not only improving the power measurement accuracy and repeatability of the uplink optical signal, but also improving the efficiency of the system for performing power detection.
  • the apparatus 700 for detecting the power of the uplink optical signal according to the embodiment of the present invention may correspond to the execution body of the method according to the embodiment of the present invention, and may also correspond to detecting the uplink optical signal.
  • the power device 300 and the optical line terminal 500, and the above and other operations and/or functions of the respective modules in the device 700 are respectively implemented in order to implement the respective processes of the respective methods in FIGS. 1 to 3. Narration.
  • the apparatus for detecting the power of the uplink optical signal in the embodiment of the present invention generates a trigger signal having the same duration for different uplink optical signals to be detected, so that the optical power is used under the trigger of the trigger signal.
  • the charging time of the detected charging circuit is the same and fixed, so that the power measurement accuracy and repeatability of the upstream optical signal can be improved.
  • an embodiment of the present invention further provides an optical network system 900, where the optical network system 900 includes:
  • Optical line terminal OLT 910 according to an embodiment of the present invention.
  • At least one optical network terminal ONT 920 At least one optical network terminal ONT 920;
  • the at least one ONT 920 is connected to the OLT 910 through the optical splitter 930.
  • the optical line terminal OLT 910 includes a media access control MAC module and an optical module, where the MAC module includes a control module, and the control module is configured to detect Each of the plurality of uplink optical signals generates a trigger signal for detecting the optical power of each of the uplink optical signals, and the trigger signals of each of the uplink optical signals have the same duration;
  • the optical module includes an optical power detection module, and the optical power detection module receives the trigger signal of each of the uplink optical signals generated by the control module, and detects each of the trigger signals of each of the uplink optical signals. The power of the upstream optical signal.
  • the optical network system of the embodiment of the present invention generates a trigger signal having the same duration for different uplink optical signals to be detected, so that the charging circuit for optical power detection is triggered by the trigger signal.
  • the charging time is the same and fixed, so that the power measurement accuracy and repeatability of the upstream optical signal can be improved.
  • control module before the control module separately generates a trigger signal for detecting optical power of each uplink optical signal, the control module is further configured to:
  • control module is specifically configured to: determine, according to a start time of each uplink optical signal, a detection time of each uplink optical signal; and a detection time of each uplink optical signal. And generating, respectively, a trigger signal for detecting the optical power of each of the uplink optical signals.
  • control module is specifically configured to: determine, according to the termination time and the duration of each uplink optical signal, a detection moment of each uplink optical signal; At the detection time, a trigger signal for detecting the optical power of each of the upstream optical signals is generated.
  • the MAC module further includes:
  • Dynamic bandwidth allocation DBA module configured to allocate an uplink bandwidth to an optical network terminal ONT connected to the OLT;
  • a processing module configured to send the uplink bandwidth allocated by the DBA module to the ONT through a data channel, and receive uplink data sent by the optical module by using the data channel;
  • the processing module is further configured to send a control signal to the optical module to control the optical module to receive or transmit the optical signal.
  • the optical module further includes: a control circuit, a driving circuit, and a transmitter, where the control circuit controls the driving circuit according to a control signal sent by the MAC module to drive the transmitter to The ONT of the OLT connection transmits a downlink optical signal.
  • the optical module further includes: a receiver and an amplifying circuit, where the receiver is configured to receive an uplink optical signal sent by the ONT connected to the OLT, and convert the uplink optical signal into a power The signal is output to the amplifying circuit and/or the optical power detecting module; the amplifying circuit amplifies the electrical signal and outputs the signal to the MAC module; the optical power detecting module detects the uplink optical signal according to the trigger signal generated by the control module. power.
  • the optical power detection module includes a charging and discharging circuit, and the charging and discharging circuit is triggered by the trigger signal generated by the control module, and the electrical signal pair is used for the duration of the trigger signal.
  • the charging and discharging circuit performs charging;
  • the MAC module is further configured to obtain a voltage value after the charging and discharging circuit is charged, and determine, according to the voltage value, a power of the uplink optical signal received by the receiver.
  • the optical module further includes a combiner, where the combiner is configured to combine the downlink optical signal sent by the optical module and the received uplink optical signal, and output the signal to the trunk light. Fiber.
  • the apparatus for detecting the power of the uplink optical signal may first determine the magnitude relationship between the uplink bandwidth allocated to the ONT to be detected and the bandwidth threshold to determine whether Power detection can be performed on the ONT to be detected.
  • the device may output a fixed duration trigger signal to the OLT to trigger power detection of the uplink optical signal; when determining that the uplink bandwidth allocated to the ONT is less than the bandwidth threshold, The device may not output a trigger signal to the OLT and does not perform power detection.
  • the DBA module of the OLT can allocate a larger uplink bandwidth for detection to the ONT to be detected, so that power detection can be performed. Therefore, the problem that the power detection cannot be performed for a long time due to factors such as the small amount of traffic of the ONT is avoided, thereby not only improving the power measurement accuracy and repeatability of the uplink optical signal, but also improving the efficiency of the system for performing power detection.
  • the optical line terminal 910 may correspond to the execution body of the method according to the embodiment of the present invention, and may further correspond to the apparatus 300 for detecting the power of the uplink optical signal,
  • the optical line terminal 500 and the apparatus 700 for detecting the power of the upstream optical signal, and the above-described and other operations and/or functions of the respective modules in the optical line terminal 910 are respectively implemented in order to implement the respective processes of the respective methods in FIGS. 1 to 3. For the sake of cleanliness, we will not repeat them here.
  • the optical network system of the embodiment of the present invention generates a trigger signal having the same duration for different uplink optical signals to be detected, so that the charging circuit for optical power detection is triggered by the trigger signal.
  • the charging time is the same and fixed, so that the power measurement accuracy and repeatability of the upstream optical signal can be improved.
  • system and “network” are often used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists separately, and both A and B exist, exist alone B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • B corresponding to A means that B is associated with A, and can be determined according to A, but it should also be understood that determining B according to A does not mean that B is determined only according to A, but also A and / or other information is determined
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), A variety of media that can store program code, such as a disk or an optical disk.

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Abstract

本发明公开了一种检测上行光信号的功率的方法、装置、光线路终端和光网络系统。该方法包括：对于待检测的多个上行光信号中的每个上行光信号，分别生成该每个上行光信号的用于检测光功率的触发信号，该每个上行光信号的触发信号具有相同的持续时间；在该每个上行光信号的触发信号的持续时间内，分别检测该每个上行光信号的功率。本发明实施例的检测上行光信号的功率的方法、装置、光线路终端和光网络系统，通过对于待检测的不同上行光信号，都生成具有相同的持续时间的触发信号，使得用于光功率检测的充电电路的充电时间相同且固定不变，从而能够提高上行光信号的功率测量精度和重复性。

Description

检测上行光信号的功率的方法、 装置、 光线路终端和光网络系统 技术领域
本发明涉及通信领域， 尤其涉及通信领域中检测上行光信号的功率的方 法、 装置、 光线路终端和光网络系统。 背景技术
在吉比特无源光网络（ Gigabit-capable Passive Optical Networks , 筒称为 "GPON" ) 系统中， 一个位于局端的光线路终端（ Optical Line Terminal, 筒 称为 "OLT" ) 设备可以与一个或者多个光网络终端 （Optical Network Terminal,筒称为 "ONT" )/光网络单元（ Optical Network Unit,筒称为 "ONU" ) 连接 (为了描述方便， 下文中将以 ONT代替 ONT和 /或 ONU进行说明）。
GPON 系统是一个时分复用 （Time Division Multiplexing , 筒称为 "TDM" ) 系统。 在下行方向上， OLT通过具有固定频率或波长的光信号将 下行信息发送到与该 OLT相连的所有 ONT,各 ONT可以分别根据自己的身 份信息， 确定 OLT发送给自己的信息。 在上行方向上， 各 ONT按照时分复 用上行光路带宽的规则， 即 ONT 按照 OLT 的动态带宽分配 （Dynamic Bandwidth Allocation, 筒称为 "DBA" )调度机制， 在特定的时隙发光， 通 过光信号向 OLT发送上行信息。
在 GPON系统中，根据光模块的不同等级， 光模块的发射光功率和接收 灵敏度不一样。 举例来说， 等级为 B+ ( CLASS B+ ) 的 OLT光模块的发射 光功率为 1.5 ~ 5dBm, 接收灵敏度≤-28dBm。 对于这类光模块， 如果接收到 的光信号的实际功率小于 -28dBm, 就可能影响系统的稳定运行， 轻则误码， 重则掉线。因而，如果系统能及时检测光模块实际收到的光信号的功率大小， 就可以获知网络的健壮性， 从而必要时可以提前预警。
同样地， 具有不同等级的光模块的系统可以支持的光分配网络（Optical Distribution Network, 筒称为 "ODN" )线路衰减能力也不一样。 例如， 等级 为 B+ ( CLASS B+ ) 的光模块， 最大可以支持 28dB的 ODN线路衰减。 即， 如果 ODN线路衰减超过 28dB, 就可能会影响系统的稳定运行， 轻则误码， 重则掉线。 如果系统能及时检测 ODN线路衰减的大小， 就可以获知网络的 健壮性， 从而必要时可以提前预警。 系统检查 ODN实际衰减的办法是： 分 别检测 OLT或者 ONT光模块的发射光功率和对端 （ ONT或者 OLT )光模 块实际接收的光功率的差值， 从而可以确定 ODN的衰减。
因此， 及时检测 OLT和 ONT光模块的实际发射光功率以及实际接收光 功率非常有意义。
目前， 为了检测 OLT接收到特定 ONT的上行光信号的功率， 可以在该 特定 ONT发送上行光信号时输出触发信号， 该触发信号的持续时间与该特 定 ONT发送上行光信号的持续时间相同， 即与该上行光信号的上行带宽相 应的上行持续时间相同，该触发信号用于触发 OLT内部的电阻电容（ Resistor Capacitor, 筒称为 "RC" ) 电路进行充电， 从而对 OLT接收到的上行光信号 的功率进行检测。
然而， 由于每个上行光信号的上行带宽可能不一样， 由此可能导致上行 光信号的功率测量精度和重复性较差。 发明内容
本发明实施例提供了一种检测上行光信号的功率的方法、 装置、 光线路 终端和光网络系统， 能够提高上行光信号的功率测量精度和重复性。
第一方面， 提供了一种检测上行光信号的功率的方法， 该方法包括： 对 于待检测的多个上行光信号中的每个上行光信号，分别生成该每个上行光信 号的用于检测光功率的触发信号， 该每个上行光信号的触发信号具有相同的 持续时间； 在该每个上行光信号的触发信号的持续时间内， 分别检测该每个 上行光信号的功率。
结合第一方面， 在第一方面的第一种可能的实现方式中， 在分别生成该 每个上行光信号的用于检测光功率的触发信号之前， 该方法还包括： 分别确 定多个上行光信号中的每个上行光信号的上行带宽与带宽阈值的大小关系； 将上行带宽大于或等于该带宽阈值的多个上行光信号确定为该待检测的多 个上行光信号， 其中， 与该带宽阈值相应的上行持续时间大于或等于该触发 信号的持续时间。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第二 种可能的实现方式中，该分别生成该每个上行光信号的用于检测光功率的触 发信号， 包括： 根据该每个上行光信号的起始时刻， 分别确定该每个上行光 信号的检测时刻； 在该每个上行光信号的检测时刻， 分别生成该每个上行光 信号的用于检测光功率的触发信号。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第三 种可能的实现方式中，该分别生成该每个上行光信号的用于检测光功率的触 发信号， 包括： 根据该每个上行光信号的终止时刻和该持续时间， 分别确定 该每个上行光信号的检测时刻； 在该每个上行光信号的检测时刻， 分别生成 该每个上行光信号的用于检测光功率的触发信号。
第二方面， 提供了一种检测上行光信号的功率的装置， 该装置包括： 生 成模块， 用于对于待检测的多个上行光信号中的每个上行光信号， 分别生成 该每个上行光信号的用于检测光功率的触发信号，该每个上行光信号的触发 信号具有相同的持续时间； 检测模块， 用于在该生成模块生成的该每个上行 光信号的触发信号的持续时间内， 分别检测该每个上行光信号的功率。
结合第二方面，在第二方面的第一种可能的实现方式中，该装置还包括： 第一确定模块，用于分别确定多个上行光信号中的每个上行光信号的上行带 宽与带宽阈值的大小关系； 第二确定模块， 用于将上行带宽大于或等于该带 宽阈值的多个上行光信号确定为该待检测的多个上行光信号， 其中， 与该带 宽阈值相应的上行持续时间大于或等于该触发信号的持续时间。
结合第二方面或第二方面的第一种可能的实现方式，在第二方面的第二 种可能的实现方式中， 该生成模块包括： 第一确定单元， 用于根据该每个上 行光信号的起始时刻， 分别确定该每个上行光信号的检测时刻； 第一生成单 元， 用于在该第一确定单元确定的该每个上行光信号的检测时刻， 分别生成 该每个上行光信号的用于检测光功率的触发信号。
结合第二方面或第二方面的第一种可能的实现方式，在第二方面的第三 种可能的实现方式中， 该生成模块包括： 第二确定单元， 用于根据该每个上 行光信号的终止时刻和该持续时间， 分别确定该每个上行光信号的检测时 刻； 第二生成单元， 用于在该第二确定单元确定的该每个上行光信号的检测 时刻， 分别生成该每个上行光信号的用于检测光功率的触发信号。
第三方面， 提供了一种光线路终端 OLT, 包括媒体接入控制 MAC模块 和光模块， 该 MAC模块包括控制模块， 该控制模块用于对待检测的多个上 行光信号中的每个上行光信号， 分别生成该每个上行光信号的用于检测光功 率的触发信号， 该每个上行光信号的触发信号具有相同的持续时间； 该光模 块包括光功率检测模块，该光功率检测模块接收该控制模块生成的该每个上 行光信号的触发信号， 并在该每个上行光信号的触发信号的持续时间内， 分 别检测该每个上行光信号的功率。
结合第三方面， 在第三方面的第一种可能的实现方式中， 在该控制模块 分别生成该每个上行光信号的用于检测光功率的触发信号之前，该控制模块 还用于： 分别确定多个上行光信号中的每个上行光信号的上行带宽与带宽阈 值的大小关系； 将上行带宽大于或等于该带宽阈值的多个上行光信号确定为 该待检测的多个上行光信号， 其中， 与该带宽阈值相应的上行持续时间大于 或等于该触发信号的持续时间。
结合第三方面或第三方面的第一种可能的实现方式，在第三方面的第二 种可能的实现方式中， 该控制模块具体用于： 根据该每个上行光信号的起始 时刻， 分别确定该每个上行光信号的检测时刻； 在该每个上行光信号的检测 时刻， 分别生成该每个上行光信号的用于检测光功率的触发信号。
结合第三方面或第三方面的第一种可能的实现方式，在第三方面的第三 种可能的实现方式中， 该控制模块具体用于： 根据该每个上行光信号的终止 时刻和该持续时间， 分别确定该每个上行光信号的检测时刻； 在该每个上行 光信号的检测时刻， 分别生成该每个上行光信号的用于检测光功率的触发信 号。
结合第三方面或第三方面的第一种至第三种可能的实现方式中的任一 种可能的实现方式， 在第三方面的第四种可能的实现方式中， 该 MAC模块 还包括： 动态带宽分配 DBA模块，用于给与该 OLT连接的光网络终端 ONT 分配上行带宽； 和处理模块， 用于将该 DBA模块分配的该上行带宽通过数 据通道发送给该 ONT, 以及通过该数据通道接收该光模块发送的上行数据； 该处理模块还用于向该光模块发送控制信号， 以控制该光模块接收或发送光 信号。
结合第三方面或第三方面的第一种至第四种可能的实现方式中的任一 种可能的实现方式， 在第三方面的第五种可能的实现方式中， 该光模块还包 括： 控制电路、 驱动电路和发射机， 其中， 该控制电路根据该 MAC模块发 送的控制信号， 控制该驱动电路， 以驱动该发射机向与该 OLT连接的 ONT 发送下行光信号。
结合第三方面或第三方面的第一种至第五种可能的实现方式中的任一 种可能的实现方式， 在第三方面的第六种可能的实现方式中， 该光模块还包 括： 接收机和放大电路， 其中， 该接收机用于接收与该 OLT连接的 ONT发 送的上行光信号， 并将该上行光信号转换为电信号后输出至该放大电路和 / 或该光功率检测模块； 该放大电路将该电信号放大后输出至该 MAC模块； 该光功率检测模块根据该控制模块生成的触发信号， 检测上行光信号的功 率。
结合第三方面的第六种可能的实现方式，在第三方面的第七种可能的实 现方式中， 该光功率检测模块包括充放电电路， 该充放电电路在该控制模块 生成的该触发信号的触发下， 在该触发信号的持续时间内， 由该电信号对该 充放电电路进行充电； 其中， 该 MAC模块还用于获取该充放电电路充电后 的电压值， 并根据该电压值确定该接收机接收的上行光信号的功率。
结合第三方面或第三方面的第一种至第七种可能的实现方式中的任一 种可能的实现方式， 在第三方面的第八种可能的实现方式中， 该光模块还包 括合路器， 该合路器用于将该光模块发射的下行光信号以及接收的上行光信 号进行合波， 并输出至主干光纤。
第四方面， 提供了一种光线路终端 OLT, 该光线路终端用于执行下面的 方法： 对于待检测的多个上行光信号中的每个上行光信号， 分别生成该每个 上行光信号的用于检测光功率的触发信号， 该每个上行光信号的触发信号具 有相同的持续时间； 在该每个上行光信号的触发信号的持续时间内， 分别检 测该每个上行光信号的功率。
结合第四方面， 在第四方面的第一种可能的实现方式中， 在该光线路终 端分别生成该每个上行光信号的用于检测光功率的触发信号之前， 该光线路 终端还用于执行下面的方法： 分别确定多个上行光信号中的每个上行光信号 的上行带宽与带宽阈值的大小关系； 将上行带宽大于或等于该带宽阈值的多 个上行光信号确定为该待检测的多个上行光信号， 其中， 与该带宽阈值相应 的上行持续时间大于或等于该触发信号的持续时间。
结合第四方面或第四方面的第一种可能的实现方式，在第四方面的第二 种可能的实现方式中，该光线路终端分别生成该每个上行光信号的用于检测 光功率的触发信号， 包括： 根据该每个上行光信号的起始时刻， 分别确定该 每个上行光信号的检测时刻； 在该每个上行光信号的检测时刻， 分别生成该 每个上行光信号的用于检测光功率的触发信号。
结合第四方面或第四方面的第一种可能的实现方式，在第四方面的第三 种可能的实现方式中，该光线路终端分别生成该每个上行光信号的用于检测 光功率的触发信号，包括：根据该每个上行光信号的终止时刻和该持续时间， 分别确定该每个上行光信号的检测时刻； 在该每个上行光信号的检测时刻， 分别生成该每个上行光信号的用于检测光功率的触发信号。
第五方面， 提供了一种检测上行光信号的功率的装置， 该装置包括处理 器、 存储器和总线系统， 该处理器和该存储器通过该总线系统相连， 该存储 器用于存储指令， 该处理器用于执行该存储器存储的指令， 其中， 该处理器 用于： 对于待检测的多个上行光信号中的每个上行光信号， 分别生成该每个 上行光信号的用于检测光功率的触发信号， 该每个上行光信号的触发信号具 有相同的持续时间； 该处理器还用于： 在该每个上行光信号的触发信号的持 续时间内， 分别检测该每个上行光信号的功率。
结合第五方面， 在第五方面的第一种可能的实现方式中， 在该处理器分 别生成该每个上行光信号的用于检测光功率的触发信号之前， 该处理器还用 于： 分别确定多个上行光信号中的每个上行光信号的上行带宽与带宽阈值的 大小关系； 将上行带宽大于或等于该带宽阈值的多个上行光信号确定为该待 检测的多个上行光信号， 其中， 与该带宽阈值相应的上行持续时间大于或等 于该触发信号的持续时间。
结合第五方面或第五方面的第一种可能的实现方式，在第五方面的第二 种可能的实现方式中，该处理器分别生成该每个上行光信号的用于检测光功 率的触发信号， 包括： 根据该每个上行光信号的起始时刻， 分别确定该每个 上行光信号的检测时刻； 在该每个上行光信号的检测时刻， 分别生成该每个 上行光信号的用于检测光功率的触发信号。
结合第五方面或第五方面的第一种可能的实现方式，在第五方面的第三 种可能的实现方式中，该处理器分别生成该每个上行光信号的用于检测光功 率的触发信号， 包括： 根据该每个上行光信号的终止时刻和该持续时间， 分 别确定该每个上行光信号的检测时刻； 在该每个上行光信号的检测时刻， 分 别生成该每个上行光信号的用于检测光功率的触发信号。
第六方面， 提供了一种光网络系统， 该光网络系统包括： 根据本发明实 施例的光线路终端 OLT; 至少一个光网络终端 ONT; 以及分光器， 其中， 该至少一个 ONT通过该分光器与该 OLT连接；该光线路终端 OLT媒体接入 控制 MAC模块和光模块， 该 MAC模块包括控制模块， 该控制模块用于对 待检测的多个上行光信号中的每个上行光信号， 分别生成该每个上行光信号 的用于检测光功率的触发信号， 该每个上行光信号的触发信号具有相同的持 续时间； 该光模块包括光功率检测模块， 该光功率检测模块接收该控制模块 生成的该每个上行光信号的触发信号， 并在该每个上行光信号的触发信号的 持续时间内， 分别检测该每个上行光信号的功率。
基于上述技术方案， 本发明实施例的检测上行光信号的功率的方法、 装 置、 光线路终端和光网络系统， 通过对于待检测的不同上行光信号， 都生成 具有相同的持续时间的触发信号， 使得在该触发信号的触发下， 用于光功率 检测的充电电路的充电时间相同且固定不变，从而能够提高上行光信号的功 率测量精度和重复性。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对本发明实施例中 所需要使用的附图作筒单地介绍， 显而易见地， 下面所描述的附图仅仅是本 发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳动的 前提下， 还可以根据这些附图获得其他的附图。
图 1是根据本发明实施例的一种应用场景的示意性框图。
图 2是根据本发明实施例的检测上行光信号的功率的方法的示意性流程 图。
图 3是根据本发明实施例的检测上行光信号的功率的方法的另一示意性 流程图。
图 4 是根据本发明实施例的检测上行光信号的功率的装置的示意性框 图。
图 5是根据本发明实施例的用于检测上行光信号的功率的装置的另一示 意性框图。
图 6是根据本发明实施例的生成模块的示意性框图。
图 7是根据本发明实施例的生成模块的另一示意性框图。
图 8是根据本发明实施例的光线路终端的示意性框图。
图 9是根据本发明实施例的光线路终端的另一示意性框图。
图 10是根据本发明实施例的用于检测上行光信号的功率的装置的再一 示意性框图。 图 11是根据本发明实施例的光网络系统的示意性框图。 具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行 清楚、 完整地描述， 显然， 所描述的实施例是本发明的一部分实施例， 而不 是全部实施例。 基于本发明中的实施例， 本领域普通技术人员在没有做出创 造性劳动的前提下所获得的所有其他实施例， 都应属于本发明保护的范围。
图 1示出了根据本发明实施例的一种应用场景的示意性框图。如图 1所 示， 无源光网络（Passive Optical Network, 筒称为 "PON" ) 系统可以包括 位于局端的光线路终端 OLT以及光网络终端 ONT/光网络单元 ONU , —个 OLT可以通过诸如无源光分路器的分光器， 与一个或多个 ONT/ONU相连。 在采用时分复用 TDM 的 PON 系统中， 例如在 GPON 系统中， 不同的 行光信号的持续时间或带宽可以统一由 OLT的 DBA模块进行分配。
应理解， 在本发明实施例中， 数据或承载数据的光信号从 OLT传输到
ONT/ONU的传输方向称为下行方向， 相应地， OLT向 ONT/ONU发送的光 信号也称为下行光信号； 类似地， 数据或承载数据的光信号从 ONT/ONU传 输到 OLT的传输方向称为上行方向， 相应地， ONT/ONU向 OLT发送的光 信号也称为上行光信号。
还应理解， 在本发明实施例中， 根据本发明实施例的用于检测上行光信 号的功率的方法和装置， 可以应用于采用 TDM的 PON系统， 例如， GPON 系统、 10G EPON系统或 10G GPON系统等， 为了描述方便， 下文中将以 GPON系统为例进行说明， 但本发明并不限于此； 此外， 为了描述方便， 下 文中将以 ONT代替 ONT和 /或 ONU进行说明， 但本发明并不限于此。
图 2示出了根据本发明实施例的检测上行光信号的功率的方法 100的示 意性流程图， 该方法 100可以由检测上行光信号的功率的装置执行， 例如该 方法 100可以由 OLT执行。 如图 2所示， 该方法 100包括：
S110, 对于待检测的多个上行光信号中的每个上行光信号， 分别生成该 每个上行光信号的用于检测光功率的触发信号， 该每个上行光信号的触发信 号具有相同的持续时间； S120, 在该每个上行光信号的触发信号的持续时间内， 分别检测该每个 上行光信号的功率。
具体而言， 为了精确测量上行光信号的功率， 并且提高功率测量的重复 性 ,检测上行光信号的功率的装置对于待检测的多个上行光信号中的每个上 行光信号， 可以分别生成每个上行光信号的触发信号， 其中， 每个上行光信 号的触发信号具有相同的持续时间；检测上行光信号的功率的装置可以在该 每个上行光信号的触发信号的持续时间内， 分别检测该每个上行光信号的功 率。 从而使得该装置包括的用于光功率检测的充电电路在触发信号的触发 下， 对于每个待检测的上行光信号检测时进行充电的时间相同且固定不变， 由此能够提高上行光信号的功率测量精度和重复性。
因此， 本发明实施例的检测上行光信号的功率的方法， 通过对于待检测 的不同上行光信号， 都生成具有相同的持续时间的触发信号， 使得在该触发 信号的触发下， 用于光功率检测的充电电路的充电时间相同且固定不变， 从 而能够提高上行光信号的功率测量精度和重复性。
应理解， 在本发明实施例中， 检测上行光信号的功率的装置对于待检测 的每个上行光信号， 都生成具有相同的持续时间的触发信号， 即检测上行光 信号的功率的装置生成的触发信号的持续时间固定不变且为一常数， 该持续 时间并不因上行光信号的上行带宽的不同而不同。
但应理解， "持续时间固定不变且为一常数" 是针对一个特定的检测上 行光信号的功率的装置而言， 即对于任意一个特定的检测上行光信号的功率 的装置， 该装置对于不同的上行光信号生成的触发信号的持续时间都相同， 但对于不同的检测上行光信号的功率的装置，生成的触发信号的持续时间可 以相同也可以不同。
在本发明实施例中， 触发信号的持续时间的具体数值， 可以在检测上行 光信号的功率的装置出厂时预先设定， 其中触发信号的持续时间的优选值可 以考虑多种因素来确定。
一方面， 触发信号的持续时间需要具有相对较长的持续时间， 以确保检 测精度足够高。 例如， 可以将检测上行光信号的功率的装置包括的充电电路 达到饱和电压时所需要的时间确定为触发信号的持续时间； 又例如， 可以将 该充电电路达到 80%的充电电压所需要的时间确定为触发信号的持续时间； 例如， 该触发信号的持续时间固定为 600ns等。 即在本发明实施例中， 触发信号的持续时间可以由充电电路的参数确 定， 例如由充电电路的电阻值和电容值确定。
具体而言， 例如对于特定的一阶 RC电路，假设 V。为 RC电路中的电容 Y的初始电压值； Vcc为该电容 Y的最大电压值； Vt为该电容 Y充电 T充 电时间后的电压值； 该电容 Y的电容值为 C; 该 RC电路包括的电阻 X的电 阻值为 R, 则 Vt可以由下面的等式（ 1 )确定：
Vt =V0 + (Vcc -V0)x[l- exp (-^；)] ( 1 ) 充电时间 T可以由下面的等式（2)确定：
T = RC-\nVcc~V° =RC \n H (2)
^ ― ^CC ― "^ C
其中， α为 Vt与 Vcc的比值。 支设电容 Y的初始电压值为 0, 即 V。=0, 则等式（2)可以筒化为等式（3 ): = RC.ln^~ (3 ) l-a 因此， 在本发明实施例中， 触发信号的持续时间例如可以上述等式（3 ) 确定。 例如， 假设将该充电电路达到 90%的充电电压所需要的时间确定为触 发信号的持续时间， 即系数 a为 0.9, 并且该充电电路的电阻值 R为 20k, 该充电电路的电容值 C为 10pf, 则该触发信号的持续时间 T为：
Γ = RC · ln^~ = ln(10) X 20 χ103χ 10 xlO-12 =460xl0_9 )
l- 即该触发信号的持续时间 T为 460ns。
应理解， 本发明实施例仅以等式（1 )至（3 )为例进行说明， 但本发明 并不限于此， 触发信号的持续时间还可以由其它等式确定。
另一方面， 为了提高功率检测的效率， 触发信号的持续时间不能太长， 否则， 由于上行光信号的发光时间或上行持续时间需要大于或等于触发信号 的固定持续时间，持续时间太长的触发信号意味着进行检测的上行光信号需 要具有较大的上行带宽。 而实际网络中， 各个 ONT的上行带宽时大时小， ONT的业务量较少时分配的上行带宽也较小， 当该 ONT的业务量持续较少 时， 可能导致较长时间内都无法进行功率检测， 由此影响系统进行上行光信 号的功率检测的效率。 因此， 为了提高功率检测的效率， 触发信号的持续时间取值范围例如为
400ns至 800ns;又例如，触发信号的持续时间取值范围为 500ns至 700ns等， 但本发明并不限于此。
再一方面，触发信号的持续时间的优选值还可以考虑校准的难易程度以 及各设备商或光电转换模块的厂商的需求等， 但本发明并不以此为限。
在本发明实施例中， 多个上行光信号既可以包括一个 ONT在多个不同 上行帧的光信号， 也可以包括多个 ONT在同一个上行帧的光信号， 还可以 包括多个 ONT在多个不同上行帧的光信号。 但应理解， 本发明实施例仅以 多个上行光信号为例进行说明， 但本发明并不限于此， 根据本发明的检测上 行光信号的功率的方法也可以对单个上行光信号的功率进行检测。
例如， 检测上行光信号的功率的装置对于待检测的单个上行光信号， 可 以生成用于检测该上行光信号的功率的触发信号，该触发信号具有的持续时 间为预先设定值， 且为一常数， 即该触发信号具有的持续时间不是根据与该 上行光信号的上行带宽所对应的上行持续时间确定的数值； 从而检测上行光 信号的功率的装置在该触发信号的持续时间内， 检测该上行光信号的功率。
因此， 本发明实施例的检测上行光信号的功率的方法， 通过对于待检测 的不同上行光信号， 都生成具有相同的持续时间的触发信号， 使得在该触发 信号的触发下， 用于光功率检测的充电电路的充电时间相同且固定不变， 从 而能够提高上行光信号的功率测量精度和重复性。
在本发明实施例中， 优选地， 为了能够提高上行光信号的功率测量精度 和重复性， 与待检测的上行光信号的上行带宽相应的上行持续时间需要大于 或等于触发信号的固定持续时间， 即待检测的上行光信号的发光时间需要大 于或等于触发信号的固定持续时间。 为此， 在对上行光信号的功率进行检测 之前，可以根据上行光信号的上行带宽，确定符合要求的待检测上行光信号。
具体而言， 在本发明实施例中， 可选地， 如图 3所示， 在分别生成该每 个上行光信号的用于检测光功率的触发信号之前， 该方法还包括：
S 130 ,分别确定多个上行光信号中的每个上行光信号的上行带宽与带宽 阈值的大小关系；
S140,将上行带宽大于或等于该带宽阈值的多个上行光信号确定为该待 检测的多个上行光信号， 其中， 与该带宽阈值相应的上行持续时间大于或等 于该触发信号的持续时间。 即在本发明实施例中，将上行带宽大于或等于带宽阈值的多个上行光信 号， 确定为该待检测的多个上行光信号， 由于与该带宽阈值相应的上行持续 时间大于或等于该触发信号的持续时间，从而能够使得与待检测的多个上行 光信号的上行带宽相应的上行持续时间大于或等于触发信号的固定持续时 间， 由此能够提高上行光信号的功率测量精度和重复性。
在本发明实施例中，对于上行带宽小于该带宽阈值的特定上行光信号而 言， 可以向该特定上行光信号分配用于检测的上行带宽， 该用于检测的上行 带宽大于或等于该带宽阈值，从而使得该特定上行光信号具有足够的上行持 续时间， 从而能够进行功率检测。
例如， 对于一个 ONT在多个不同上行帧的多个光信号， 检测上行光信 号的功率的装置在确定连续 N个上行帧中分配给该待检测的 ONT的上行带 宽都小于带宽阈值， 并且该 N大于或等于帧阈值时， 向该待检测的 ONT分 配用于检测的上行带宽， 该用于检测的上行带宽大于或等于该带宽阈值， 并 且该 N为正整数。
具体地， 例如该帧阈值可以预设置为 5 , 即至少在连续 5个上行帧中， 如果分配给该待检测的 ONT的上行带宽都小于该带宽阈值， 可以向该待检 测的 ONT分配大于或等于该带宽阈值的上行带宽。 从而该确定分配给该待 检测的 ONT的上行带宽大于或等于该带宽阈值， 由此可以进行上行光信号 的功率检测。
应理解， 在本发明实施例中， 带宽可以指单位时间通过的数据量。 对于 上行速率恒定的 PON系统， 带宽与信号的持续时间具有对应关系。 例如， 在 GPON系统中， 假设一个上行帧为 125us, 对应的总带宽为 1.25GHz, 那 么如果 OLT分配给 ONT的上行带宽为 10MHz, 则该 ONT在该上行帧内发 送上行光信号的持续时间为 lus。
还应理解， 在本发明实施例中， 与带宽阈值相应的上行持续时间可以表 示带宽为带宽阈值的上行光信号的持续时间； 例如， 在上述上行速率恒定的 PON系统中， 与带宽阈值相应的上行持续时间可以表示当 ONT被分配与带 宽阈值相等的带宽时， 该 ONT发送上行光信号的持续时间。 例如， H殳该 带宽阈值为 6MHz, 则与带宽阈值相应的上行持续时间为 0.6us。
还应理解， 在本发明实施例中， 待检测的多个上行光信号可以指代与上 行带宽相应的持续时间大于或等于触发信号的持续时间的多个上行光信号， 但本发明并不限于此。
在本发明实施例中， 可选地， 该分别生成该每个上行光信号的用于检测 光功率的触发信号， 包括：
根据该每个上行光信号的起始时刻， 分别确定该每个上行光信号的检测 时刻；
在该每个上行光信号的检测时刻， 分别生成该每个上行光信号的用于检 测光功率的触发信号。
例如， 在本发明实施例中， 检测上行光信号的功率的装置可以将每个上 行光信号的起始时刻， 分别确定该每个上行光信号的检测时刻； 该装置也可 以基于该起始时刻与延迟值确定检测时刻， 例如， 该装置可以将每个上行光 信号的起始时刻之后 10ns 的时刻作为每个上行光信号的检测时刻， 但本发 明并不限于此。
在本发明实施例中， 可选地， 该分别生成该每个上行光信号的用于检测 光功率的触发信号， 包括：
根据该每个上行光信号的终止时刻和该持续时间， 分别确定该每个上行 光信号的检测时刻；
在该每个上行光信号的检测时刻， 分别生成该每个上行光信号的用于检 测光功率的触发信号。
例如， 检测上行光信号的功率的装置可以基于 ONT发送上行光信号的 终止时刻和该触发信号的固定持续时间， 确定该检测时刻， 例如将该最终时 刻之前的某个时刻确定为检测时刻， 使得该装置进行功率检测的整个期间， 上行光信号的强度幅值非零即可。 例如， 该触发信号的终止时刻与上行光信 号的终止时刻相同等； 又例如， 设置检测时刻使得该触发信号的终止时刻比 上行光信号的终止时刻早 10ns等。 但本发明并不限于此。
应理解， 在本发明实施例中， 对于待检测的任意一个 ONT而言， 检测 上行光信号的功率的装置可以首先确定分配给待检测的 ONT的上行带宽与 带宽阈值的大小关系， 以确定是否可以对该待检测的 ONT进行功率检测。 当确定分配给 ONT的上行带宽大于或等于带宽阈值时， 该装置可以向 OLT 输出固定持续时间的触发信号， 以触发上行光信号的功率检测； 当确定分配 给 ONT的上行带宽小于带宽阈值时， 装置可以不向 OLT输出触发信号， 不 进行功率检测。 但当该待检测的 ONT在连续多帧中分配的上行带宽都没有 满足条件时， OLT的 DBA模块可以专门给该待检测的 ONT分配较大的用于 检测的上行带宽， 以能够进行功率检测， 从而避免由于 ONT的业务量较少 等因素而长时间不能进行功率检测的问题， 由此不仅能够提高上行光信号的 功率测量精度和重复性， 还能够提高系统进行功率检测的效率。
应理解， 在本发明实施例中， 带宽阈值、 触发信号的固定持续时间、 帧 阈值、 用于检测的上行带宽等参数为预设值， 并且可以基于各种因素确定， 本发明并不限于各实施例中的具体描述。
还应理解， 在本发明的各种实施例中， 上述各过程的序号的大小并不意 味着执行顺序的先后， 各过程的执行顺序应以其功能和内在逻辑确定， 而不 应对本发明实施例的实施过程构成任何限定。
因此， 本发明实施例的检测上行光信号的功率的方法， 通过对于待检测 的不同上行光信号， 都生成具有相同的持续时间的触发信号， 使得在该触发 信号的触发下， 用于光功率检测的充电电路的充电时间相同且固定不变， 从 而能够提高上行光信号的功率测量精度和重复性。
上文中结合图 1至图 3 , 详细描述了根据本发明实施例的检测上行光信 号的功率的方法， 下面将结合图 4至图 11 ,详细描述根据本发明实施例的检 测上行光信号的功率的基站、 光线路终端和光网络系统。
图 4示出了根据本发明实施例的检测上行光信号的功率的装置 300的示 意性框图。 如图 4所示， 该装置 300包括：
生成模块 310,用于对于待检测的多个上行光信号中的每个上行光信号， 分别生成该每个上行光信号的用于检测光功率的触发信号， 该每个上行光信 号的触发信号具有相同的持续时间；
检测模块 320, 用于在该生成模块 310生成的该每个上行光信号的触发 信号的持续时间内， 分别检测该每个上行光信号的功率。
因此， 本发明实施例的检测上行光信号的功率的装置， 通过对于待检测 的不同上行光信号， 都生成具有相同的持续时间的触发信号， 使得在该触发 信号的触发下， 用于光功率检测的充电电路的充电时间相同且固定不变， 从 而能够提高上行光信号的功率测量精度和重复性。
在本发明实施例中，检测上行光信号的功率的装置 300对于待检测的每 个上行光信号， 都生成具有相同的持续时间的触发信号， 即检测上行光信号 的功率的装置 300生成的触发信号的持续时间固定不变且为一常数， 该持续 时间并不因上行光信号的上行带宽的不同而不同。
但应理解， "持续时间固定不变且为一常数" 是针对一个特定的检测上 行光信号的功率的装置而言， 即对于任意一个特定的检测上行光信号的功率 的装置， 该装置对于不同的上行光信号生成的触发信号的持续时间都相同， 但对于不同的检测上行光信号的功率的装置，生成的触发信号的持续时间可 以相同也可以不同。
在本发明实施例中， 优选地， 为了能够提高上行光信号的功率测量精度 和重复性， 与待检测的上行光信号的上行带宽相应的上行持续时间需要大于 或等于触发信号的固定持续时间， 即待检测的上行光信号的发光时间需要大 于或等于触发信号的固定持续时间。 为此， 在对上行光信号的功率进行检测 之前，可以根据上行光信号的上行带宽，确定符合要求的待检测上行光信号。
具体而言， 在本发明实施例中， 可选地， 如图 5所示， 该装置 300还包 括：
第一确定模块 330, 用于分别确定多个上行光信号中的每个上行光信号 的上行带宽与带宽阈值的大小关系；
第二确定模块 340 , 用于将上行带宽大于或等于该带宽阈值的多个上行 光信号确定为该待检测的多个上行光信号， 其中， 与该带宽阈值相应的上行 持续时间大于或等于该触发信号的持续时间。
即在本发明实施例中，将上行带宽大于或等于带宽阈值的多个上行光信 号， 确定为该待检测的多个上行光信号， 由于与该带宽阈值相应的上行持续 时间大于或等于该触发信号的持续时间，从而能够使得与待检测的多个上行 光信号的上行带宽相应的上行持续时间大于或等于触发信号的固定持续时 间， 由此能够提高上行光信号的功率测量精度和重复性。
在本发明实施例中， 可选地， 如图 6所示， 该生成模块 310包括： 第一确定单元 311 , 用于根据该每个上行光信号的起始时刻， 分别确定 该每个上行光信号的检测时刻；
第一生成单元 312, 用于在该第一确定单元 311确定的该每个上行光信 号的检测时刻， 分别生成该每个上行光信号的用于检测光功率的触发信号。
可选地， 如图 7所示， 该生成模块 310包括：
第二确定单元 313 , 用于根据该每个上行光信号的终止时刻和该持续时 间， 分别确定该每个上行光信号的检测时刻； 第二生成单元 314, 用于在该第二确定单元 313确定的该每个上行光信 号的检测时刻， 分别生成该每个上行光信号的用于检测光功率的触发信号。
在本发明实施例中， 可选地， 该检测上行光信号的功率的装置 300 为 OLT; 进一步地， 生成模块 310可以集成在该 OLT的媒体接入控制 （Media Access Control, MAC ) 芯片上， 即第一确定单元 311和第一生成单元 312 可以集成在 OLT的 MAC芯片上， 或第二确定单元 313和第二生成单元 314 可以集成在 OLT的 MAC芯片上。
应理解， 在本发明实施例中， 对于待检测的任意一个 ONT而言， 检测 上行光信号的功率的装置可以首先确定分配给待检测的 ONT的上行带宽与 带宽阈值的大小关系， 以确定是否可以对该待检测的 ONT进行功率检测。 当确定分配给 ONT的上行带宽大于或等于带宽阈值时， 该装置可以向 OLT 输出固定持续时间的触发信号， 以触发上行光信号的功率检测； 当确定分配 给 ONT的上行带宽小于带宽阈值时， 装置可以不向 OLT输出触发信号， 不 进行功率检测。 但当该待检测的 ONT在连续多帧中分配的上行带宽都没有 满足条件时， OLT的 DBA模块可以专门给该待检测的 ONT分配较大的用于 检测的上行带宽， 以能够进行功率检测， 从而避免由于 ONT的业务量较少 等因素而长时间不能进行功率检测的问题， 由此不仅能够提高上行光信号的 功率测量精度和重复性， 还能够提高系统进行功率检测的效率。
还应理解， 在本发明实施例中， 根据本发明实施例的检测上行光信号的 功率的装置 300 可对应于根据本发明实施例的方法的执行主体， 并且装置 300中的各个模块的上述和其它操作和 /或功能分别为了实现图 1至图 3中的 各个方法的相应流程， 为了筒洁， 在此不再赘述。
因此， 本发明实施例的检测上行光信号的功率的装置， 通过对于待检测 的不同上行光信号， 都生成具有相同的持续时间的触发信号， 使得在该触发 信号的触发下， 用于光功率检测的充电电路的充电时间相同且固定不变， 从 而能够提高上行光信号的功率测量精度和重复性。
图 8示出了根据本发明实施例的光线路终端 500的示意性框图。 如图 8 所示，该光线路终端 OLT 500包括媒体接入控制 MAC模块 510和光模块 520, 其中，
该 MAC模块 510包括控制模块 511 , 该控制模块 511用于对待检测的 多个上行光信号中的每个上行光信号， 分别生成该每个上行光信号的用于检 测光功率的触发信号， 该每个上行光信号的触发信号具有相同的持续时间； 该光模块 520包括光功率检测模块 521 , 该光功率检测模块 521接收该 控制模块 511生成的该每个上行光信号的触发信号， 并在该每个上行光信号 的触发信号的持续时间内， 分别检测该每个上行光信号的功率。
因此，本发明实施例的光线路终端，通过对于待检测的不同上行光信号， 都生成具有相同的持续时间的触发信号， 使得在该触发信号的触发下， 用于 光功率检测的充电电路的充电时间相同且固定不变，从而能够提高上行光信 号的功率测量精度和重复性。
可选地， 在本发明实施例中， 在该控制模块 511分别生成该每个上行光 信号的用于检测光功率的触发信号之前， 该控制模块 511还用于：
分别确定多个上行光信号中的每个上行光信号的上行带宽与带宽阈值 的大小关系；
将上行带宽大于或等于该带宽阈值的多个上行光信号确定为该待检测 的多个上行光信号， 其中， 与该带宽阈值相应的上行持续时间大于或等于该 触发信号的持续时间。
可选地， 在本发明实施例中， 该控制模块 511具体用于： 根据该每个上 行光信号的起始时刻， 分别确定该每个上行光信号的检测时刻； 在该每个上 行光信号的检测时刻，分别生成该每个上行光信号的用于检测光功率的触发 信号。
可选地， 在本发明实施例中， 该控制模块 511具体用于： 根据该每个上 行光信号的终止时刻和该持续时间， 分别确定该每个上行光信号的检测时 刻； 在该每个上行光信号的检测时刻， 分别生成该每个上行光信号的用于检 测光功率的触发信号。
在本发明实施例中， 可选地， 如图 9所示， 该 MAC模块 510还包括： 动态带宽分配 DBA模块 512 ,用于给与该 OLT连接的光网络终端 ONT 分配上行带宽； 和
处理模块 513 , 用于将该 DBA模块 512分配的该上行带宽通过数据通 道发送给该 ONT, 以及通过该数据通道接收该光模块 520发送的上行数据； 该处理模块 513还用于向该光模块 520发送控制信号， 以控制该光模块 520接收或发送光信号。
可选地， 如图 9所示， 该光模块 520还包括： 控制电路 522、 驱动电路 523和发射机 524,其中，该控制电路 522根据该 MAC模块 510发送的控制 信号， 控制该驱动电路 523 , 以驱动该发射机 524向与该 OLT连接的 ONT 发送下行光信号。
可选地，如图 9所示，该光模块 520还包括：接收机 525和放大电路 526, 其中， 该接收机 525用于接收与该 OLT连接的 ONT发送的上行光信号， 并 将该上行光信号转换为电信号后输出至该放大电路 526 和 /或该光功率检测 模块 521；该放大电路 526将该电信号放大后输出至该 MAC模块 510; 该光 功率检测模块 521根据该控制模块 511生成的触发信号，检测上行光信号的 功率。
应理解，在本发明实施例中，处理模块用于通过控制信号控制控制电路， 以使得驱动电路驱动发射机发射下行光信号； 该处理模块还可以用于通过接 收数据通道接收光模块发送的上行数据， 其中该上行数据为该光模块接收上 行光信号后进行光电转换以及放大后的电信号， 其中该控制信号为 MAC模 块中的控制模块与光模块中的光功率检测模块之间的触发信号外的控制信 号。
在本发明实施例中， 可选地， 该光功率检测模块 521包括充放电电路， 该充放电电路在该控制模块 511生成的该触发信号的触发下， 在该触发信号 的持续时间内， 由该电信号对该充放电电路进行充电；
其中， 该 MAC模块 510还用于获取该充放电电路充电后的电压值， 并 根据该电压值确定该接收机 525接收的上行光信号的功率。
在本发明实施例中， 可选地， 如图 9所示， 该光模块 520还包括合路器 527, 该合路器 527用于将该光模块 520发射的下行光信号以及接收的上行 光信号进行合波， 并输出至主干光纤。
应理解， 在本发明实施例中， 对于待检测的任意一个 ONT而言， 检测 上行光信号的功率的装置可以首先确定分配给待检测的 ONT的上行带宽与 带宽阈值的大小关系， 以确定是否可以对该待检测的 ONT进行功率检测。 当确定分配给 ONT的上行带宽大于或等于带宽阈值时， 该装置可以向 OLT 输出固定持续时间的触发信号， 以触发上行光信号的功率检测； 当确定分配 给 ONT的上行带宽小于带宽阈值时， 装置可以不向 OLT输出触发信号， 不 进行功率检测。 但当该待检测的 ONT在连续多帧中分配的上行带宽都没有 满足条件时， OLT的 DBA模块可以专门给该待检测的 ONT分配较大的用于 检测的上行带宽， 以能够进行功率检测， 从而避免由于 ONT的业务量较少 等因素而长时间不能进行功率检测的问题， 由此不仅能够提高上行光信号的 功率测量精度和重复性， 还能够提高系统进行功率检测的效率。
还应理解， 在本发明实施例中， 根据本发明实施例的光线路终端 500可 对应于根据本发明实施例的方法的执行主体，还可以对应于检测上行光信号 的功率的装置 300, 并且该光线路终端 500中的各个模块的上述和其它操作 和 /或功能分别为了实现图 1至图 3中的各个方法的相应流程， 为了筒洁，在 此不再赘述。
因此，本发明实施例的光线路终端，通过对于待检测的不同上行光信号， 都生成具有相同的持续时间的触发信号， 使得在该触发信号的触发下， 用于 光功率检测的充电电路的充电时间相同且固定不变，从而能够提高上行光信 号的功率测量精度和重复性。
本发明实施例还提供了一种光线路终端 OLT,该光线路终端用于执行下 面的方法：
对于待检测的多个上行光信号中的每个上行光信号，分别生成该每个上 行光信号的用于检测光功率的触发信号， 该每个上行光信号的触发信号具有 相同的持续时间；
在该每个上行光信号的触发信号的持续时间内， 分别检测该每个上行光 信号的功率。
因此，本发明实施例的光线路终端，通过对于待检测的不同上行光信号， 都生成具有相同的持续时间的触发信号， 使得在该触发信号的触发下， 用于 光功率检测的充电电路的充电时间相同且固定不变，从而能够提高上行光信 号的功率测量精度和重复性。
在本发明实施例中， 可选地， 在该光线路终端分别生成该每个上行光信 号的用于检测光功率的触发信号之前， 该光线路终端还用于执行下面的方 法：
分别确定多个上行光信号中的每个上行光信号的上行带宽与带宽阈值 的大小关系；
将上行带宽大于或等于该带宽阈值的多个上行光信号确定为该待检测 的多个上行光信号， 其中， 与该带宽阈值相应的上行持续时间大于或等于该 触发信号的持续时间。 在本发明实施例中， 可选地， 该光线路终端分别生成该每个上行光信号 的用于检测光功率的触发信号， 包括：
根据该每个上行光信号的起始时刻， 分别确定该每个上行光信号的检测 时刻；
在该每个上行光信号的检测时刻， 分别生成该每个上行光信号的用于检 测光功率的触发信号。
在本发明实施例中， 可选地， 该光线路终端分别生成该每个上行光信号 的用于检测光功率的触发信号， 包括：
根据该每个上行光信号的终止时刻和该持续时间， 分别确定该每个上行 光信号的检测时刻；
在该每个上行光信号的检测时刻， 分别生成该每个上行光信号的用于检 测光功率的触发信号。
应理解， 在本发明实施例中， 对于待检测的任意一个 ONT而言， 检测 上行光信号的功率的装置可以首先确定分配给待检测的 ONT的上行带宽与 带宽阈值的大小关系， 以确定是否可以对该待检测的 ONT进行功率检测。 当确定分配给 ONT的上行带宽大于或等于带宽阈值时， 该装置可以向 OLT 输出固定持续时间的触发信号， 以触发上行光信号的功率检测； 当确定分配 给 ONT的上行带宽小于带宽阈值时， 装置可以不向 OLT输出触发信号， 不 进行功率检测。 但当该待检测的 ONT在连续多帧中分配的上行带宽都没有 满足条件时， OLT的 DBA模块可以专门给该待检测的 ONT分配较大的用于 检测的上行带宽， 以能够进行功率检测， 从而避免由于 ONT的业务量较少 等因素而长时间不能进行功率检测的问题， 由此不仅能够提高上行光信号的 功率测量精度和重复性， 还能够提高系统进行功率检测的效率。
还应理解， 在本发明实施例中， 根据本发明实施例的光线路终端可对应 于根据本发明实施例的方法的执行主体，还可以对应于检测上行光信号的功 率的装置 300和光线路终端 500, 并且该光线路终端中的各个模块的上述和 其它操作和 /或功能分别为了实现图 1至图 3中的各个方法的相应流程，为了 筒洁， 在此不再赘述。
因此，本发明实施例的光线路终端，通过对于待检测的不同上行光信号， 都生成具有相同的持续时间的触发信号， 使得在该触发信号的触发下， 用于 光功率检测的充电电路的充电时间相同且固定不变，从而能够提高上行光信 号的功率测量精度和重复性。
如图 10所示， 本发明实施例还提供了一种检测上行光信号的功率的装 置 700, 其特征在于， 该装置 700包括处理器 710、 存储器 720和总线系统 730,该处理器 710和该存储器 720通过该总线系统 730相连，该存储器 720 用于存储指令， 该处理器 710用于执行该存储器 720存储的指令，
其中， 该处理器 710用于： 对于待检测的多个上行光信号中的每个上行 光信号， 分别生成该每个上行光信号的用于检测光功率的触发信号， 该每个 上行光信号的触发信号具有相同的持续时间；
该处理器 710还用于： 在该每个上行光信号的触发信号的持续时间内， 分别检测该每个上行光信号的功率。
因此， 本发明实施例的检测上行光信号的功率的装置， 通过对于待检测 的不同上行光信号， 都生成具有相同的持续时间的触发信号， 使得在该触发 信号的触发下， 用于光功率检测的充电电路的充电时间相同且固定不变， 从 而能够提高上行光信号的功率测量精度和重复性。
应理解，在本发明实施例中，该处理器 710可以是中央处理单元（ Central
Processing Unit, 筒称为 "CPU" ), 该处理器 710还可以是其他通用处理器、 数字信号处理器（DSP )、专用集成电路（ASIC )、现成可编程门阵列（FPGA ) 或者其他可编程逻辑器件、 分立门或者晶体管逻辑器件、 分立硬件组件等。 通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
该存储器 720可以包括只读存储器和随机存取存储器， 并向处理器 710 提供指令和数据。存储器 720的一部分还可以包括非易失性随机存取存储器。 例如， 存储器 720还可以存储设备类型的信息。
该总线系统 730除包括数据总线之外， 还可以包括电源总线、 控制总线 和状态信号总线等。 但是为了清楚说明起见， 在图中将各种总线都标为总线 系统 730。
在实现过程中， 上述方法的各步骤可以通过处理器 710中的硬件的集成 逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步骤 可以直接体现为硬件处理器执行完成， 或者用处理器中的硬件及软件模块组 合执行完成。 软件模块可以位于随机存储器， 闪存、 只读存储器， 可编程只 读存储器或者电可擦写可编程存储器、 寄存器等本领域成熟的存储介质中。 该存储介质位于存储器 720, 处理器 710读取存储器 720中的信息， 结合其 硬件完成上述方法的步骤。 为避免重复， 这里不再详细描述。
可选地， 作为一个实施例， 在该处理器 710分别生成该每个上行光信号 的用于检测光功率的触发信号之前， 该处理器 710还用于：
分别确定多个上行光信号中的每个上行光信号的上行带宽与带宽阈值 的大小关系；
将上行带宽大于或等于该带宽阈值的多个上行光信号确定为该待检测 的多个上行光信号， 其中， 与该带宽阈值相应的上行持续时间大于或等于该 触发信号的持续时间。
可选地， 作为一个实施例， 该处理器 710分别生成该每个上行光信号的 用于检测光功率的触发信号， 包括：
根据该每个上行光信号的起始时刻， 分别确定该每个上行光信号的检测 时刻；
在该每个上行光信号的检测时刻， 分别生成该每个上行光信号的用于检 测光功率的触发信号。
可选地， 作为一个实施例， 该处理器 710分别生成该每个上行光信号的 用于检测光功率的触发信号， 包括：
根据该每个上行光信号的终止时刻和该持续时间， 分别确定该每个上行 光信号的检测时刻；
在该每个上行光信号的检测时刻， 分别生成该每个上行光信号的用于检 测光功率的触发信号。
应理解， 在本发明实施例中， 对于待检测的任意一个 ONT而言， 检测 上行光信号的功率的装置可以首先确定分配给待检测的 ONT的上行带宽与 带宽阈值的大小关系， 以确定是否可以对该待检测的 ONT进行功率检测。 当确定分配给 ONT的上行带宽大于或等于带宽阈值时， 该装置可以向 OLT 输出固定持续时间的触发信号， 以触发上行光信号的功率检测； 当确定分配 给 ONT的上行带宽小于带宽阈值时， 装置可以不向 OLT输出触发信号， 不 进行功率检测。 但当该待检测的 ONT在连续多帧中分配的上行带宽都没有 满足条件时， OLT的 DBA模块可以专门给该待检测的 ONT分配较大的用于 检测的上行带宽， 以能够进行功率检测， 从而避免由于 ONT的业务量较少 等因素而长时间不能进行功率检测的问题， 由此不仅能够提高上行光信号的 功率测量精度和重复性， 还能够提高系统进行功率检测的效率。 还应理解， 在本发明实施例中， 根据本发明实施例的检测上行光信号的 功率的装置 700, 可对应于根据本发明实施例的方法的执行主体， 还可以对 应于检测上行光信号的功率的装置 300和光线路终端 500, 并且该装置 700 中的各个模块的上述和其它操作和 /或功能分别为了实现图 1至图 3中的各个 方法的相应流程， 为了筒洁， 在此不再赘述。
因此， 本发明实施例的检测上行光信号的功率的装置， 通过对于待检测 的不同上行光信号， 都生成具有相同的持续时间的触发信号， 使得在该触发 信号的触发下， 用于光功率检测的充电电路的充电时间相同且固定不变， 从 而能够提高上行光信号的功率测量精度和重复性。
如图 11所示， 本发明实施例还提供了一种光网络系统 900,该光网络系 统 900包括：
根据本发明实施例的光线路终端 OLT 910;
至少一个光网络终端 ONT 920; 以及
分光器 930,
其中， 该至少一个 ONT 920通过该分光器 930与该 OLT 910连接， 其中， 该光线路终端 OLT 910包括媒体接入控制 MAC模块和光模块， 该 MAC模块包括控制模块， 该控制模块用于对待检测的多个上行光信 号中的每个上行光信号， 分别生成该每个上行光信号的用于检测光功率的触 发信号， 该每个上行光信号的触发信号具有相同的持续时间；
该光模块包括光功率检测模块，该光功率检测模块接收该控制模块生成 的该每个上行光信号的触发信号， 并在该每个上行光信号的触发信号的持续 时间内， 分别检测该每个上行光信号的功率。
因此，本发明实施例的光网络系统，通过对于待检测的不同上行光信号， 都生成具有相同的持续时间的触发信号， 使得在该触发信号的触发下， 用于 光功率检测的充电电路的充电时间相同且固定不变，从而能够提高上行光信 号的功率测量精度和重复性。
可选地， 作为一个实施例， 在该控制模块分别生成该每个上行光信号的 用于检测光功率的触发信号之前， 该控制模块还用于：
分别确定多个上行光信号中的每个上行光信号的上行带宽与带宽阈值 的大小关系；
将上行带宽大于或等于该带宽阈值的多个上行光信号确定为该待检测 的多个上行光信号， 其中， 与该带宽阈值相应的上行持续时间大于或等于该 触发信号的持续时间。
可选地， 作为一个实施例， 该控制模块具体用于： 根据该每个上行光信 号的起始时刻， 分别确定该每个上行光信号的检测时刻； 在该每个上行光信 号的检测时刻， 分别生成该每个上行光信号的用于检测光功率的触发信号。
可选地， 作为一个实施例， 该控制模块具体用于： 根据该每个上行光信 号的终止时刻和该持续时间， 分别确定该每个上行光信号的检测时刻； 在该 每个上行光信号的检测时刻， 分别生成该每个上行光信号的用于检测光功率 的触发信号。
可选地， 作为一个实施例， 该 MAC模块还包括：
动态带宽分配 DBA模块， 用于给与该 OLT连接的光网络终端 ONT分 配上行带宽； 和
处理模块， 用于将该 DBA模块分配的该上行带宽通过数据通道发送给 该 ONT, 以及通过该数据通道接收该光模块发送的上行数据；
该处理模块还用于向该光模块发送控制信号， 以控制该光模块接收或发 送光信号。
可选地， 作为一个实施例， 该光模块还包括： 控制电路、 驱动电路和发 射机， 其中， 该控制电路根据该 MAC模块发送的控制信号， 控制该驱动电 路， 以驱动该发射机向与该 OLT连接的 ONT发送下行光信号。
可选地，作为一个实施例， 该光模块还包括： 接收机和放大电路， 其中， 该接收机用于接收与该 OLT连接的 ONT发送的上行光信号， 并将该上行光 信号转换为电信号后输出至该放大电路和 /或该光功率检测模块；该放大电路 将该电信号放大后输出至该 MAC模块； 该光功率检测模块根据该控制模块 生成的触发信号， 检测上行光信号的功率。
可选地， 作为一个实施例， 该光功率检测模块包括充放电电路， 该充放 电电路在该控制模块生成的该触发信号的触发下，在该触发信号的持续时间 内， 由该电信号对该充放电电路进行充电；
其中， 该 MAC模块还用于获取该充放电电路充电后的电压值， 并根据 该电压值确定该接收机接收的上行光信号的功率。
可选地， 作为一个实施例， 该光模块还包括合路器， 该合路器用于将该 光模块发射的下行光信号以及接收的上行光信号进行合波， 并输出至主干光 纤。
应理解， 在本发明实施例中， 对于待检测的任意一个 ONT而言， 检测 上行光信号的功率的装置可以首先确定分配给待检测的 ONT的上行带宽与 带宽阈值的大小关系， 以确定是否可以对该待检测的 ONT进行功率检测。 当确定分配给 ONT的上行带宽大于或等于带宽阈值时， 该装置可以向 OLT 输出固定持续时间的触发信号， 以触发上行光信号的功率检测； 当确定分配 给 ONT的上行带宽小于带宽阈值时， 装置可以不向 OLT输出触发信号， 不 进行功率检测。 但当该待检测的 ONT在连续多帧中分配的上行带宽都没有 满足条件时， OLT的 DBA模块可以专门给该待检测的 ONT分配较大的用于 检测的上行带宽， 以能够进行功率检测， 从而避免由于 ONT的业务量较少 等因素而长时间不能进行功率检测的问题， 由此不仅能够提高上行光信号的 功率测量精度和重复性， 还能够提高系统进行功率检测的效率。
还应理解， 在本发明实施例中， 根据本发明实施例的光线路终端 910, 可对应于根据本发明实施例的方法的执行主体，还可以对应于检测上行光信 号的功率的装置 300、光线路终端 500和检测上行光信号的功率的装置 700, 并且该光线路终端 910 中的各个模块的上述和其它操作和 /或功能分别为了 实现图 1至图 3中的各个方法的相应流程， 为了筒洁， 在此不再赘述。
因此，本发明实施例的光网络系统，通过对于待检测的不同上行光信号， 都生成具有相同的持续时间的触发信号， 使得在该触发信号的触发下， 用于 光功率检测的充电电路的充电时间相同且固定不变，从而能够提高上行光信 号的功率测量精度和重复性。
另外， 本文中术语 "系统" 和 "网络" 在本文中常被可互换使用。 本文 中术语 "和 /或"， 仅仅是一种描述关联对象的关联关系， 表示可以存在三种 关系， 例如， A和 /或 B, 可以表示： 单独存在 A , 同时存在 A和 B, 单独存 在 B这三种情况。另外，本文中字符 "/" ,一般表示前后关联对象是一种 "或" 的关系。
应理解， 在本发明实施例中， "与 A相应的 B"表示 B与 A相关联， 根 据 A可以确定 但还应理解， 根据 A确定 B并不意味着仅仅根据 A确定 B, 还可以根据 A和 /或其它信息确定
本领域普通技术人员可以意识到， 结合本文中所公开的实施例描述的各 示例的单元及算法步骤， 能够以电子硬件、 计算机软件或者二者的结合来实 现， 为了清楚地说明硬件和软件的可互换性， 在上述说明中已经按照功能一 般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执 行， 取决于技术方案的特定应用和设计约束条件。 专业技术人员可以对每个 特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超 出本发明的范围。
所属领域的技术人员可以清楚地了解到， 为了描述的方便和筒洁， 上述 描述的系统、 装置和单元的具体工作过程， 可以参考前述方法实施例中的对 应过程， 在此不再赘述。
在本申请所提供的几个实施例中， 应该理解到， 所揭露的系统、 装置和 方法， 可以通过其它的方式实现。 例如， 以上所描述的装置实施例仅仅是示 意性的， 例如， 所述单元的划分， 仅仅为一种逻辑功能划分， 实际实现时可 以有另外的划分方式， 例如多个单元或组件可以结合或者可以集成到另一个 系统， 或一些特征可以忽略， 或不执行。 另外， 所显示或讨论的相互之间的 耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或 通信连接， 也可以是电的， 机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作 为单元显示的部件可以是或者也可以不是物理单元， 即可以位于一个地方， 或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或 者全部单元来实现本发明实施例方案的目的。
另外， 在本发明各个实施例中的各功能单元可以集成在一个处理单元 中， 也可以是各个单元单独物理存在， 也可以是两个或两个以上单元集成在 一个单元中。 上述集成的单元既可以采用硬件的形式实现， 也可以采用软件 功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销 售或使用时， 可以存储在一个计算机可读取存储介质中。 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， 或者该技术方 案的全部或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 一个存储介质中， 包括若干指令用以使得一台计算机设备（可以是个人计算 机， 服务器， 或者网络设备等）执行本发明各个实施例所述方法的全部或部 分步骤。 而前述的存储介质包括： U盘、 移动硬盘、 只读存储器（ROM, Read-Only Memory )、 随机存取存者器 ( RAM, Random Access Memory )、 磁碟或者光盘等各种可以存储程序代码的介质。
以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局限 于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易 想到各种等效的修改或替换， 这些修改或替换都应涵盖在本发明的保护范围 之内。 因此， 本发明的保护范围应以权利要求的保护范围为准。

Claims

权利要求
1、 一种检测上行光信号的功率的方法， 其特征在于， 包括：
对于待检测的多个上行光信号中的每个上行光信号，分别生成所述每个 上行光信号的用于检测光功率的触发信号， 所述每个上行光信号的触发信号 具有相同的持续时间；
在所述每个上行光信号的触发信号的持续时间内， 分别检测所述每个上 行光信号的功率。
2、 根据权利要求 1所述的方法， 其特征在于， 在分别生成所述每个上 行光信号的用于检测光功率的触发信号之前， 所述方法还包括：
分别确定多个上行光信号中的每个上行光信号的上行带宽与带宽阈值 的大小关系；
将上行带宽大于或等于所述带宽阈值的多个上行光信号确定为所述待 检测的多个上行光信号， 其中， 与所述带宽阈值相应的上行持续时间大于或 等于所述触发信号的持续时间。
3、 根据权利要求 1或 2所述的方法， 其特征在于， 所述分别生成所述 每个上行光信号的用于检测光功率的触发信号， 包括：
根据所述每个上行光信号的起始时刻，分别确定所述每个上行光信号的 检测时刻；
在所述每个上行光信号的检测时刻 , 分别生成所述每个上行光信号的用 于检测光功率的触发信号。
4、 根据权利要求 1或 2所述的方法， 其特征在于， 所述分别生成所述 每个上行光信号的用于检测光功率的触发信号， 包括：
根据所述每个上行光信号的终止时刻和所述持续时间， 分别确定所述每 个上行光信号的检测时刻；
在所述每个上行光信号的检测时刻， 分别生成所述每个上行光信号的用 于检测光功率的触发信号。
5、 根据权利要求 1至 4中任意一项所述的方法， 其特征在于， 所述触 发信号的持续时间的取值范围为 400ns至 800ns; 或者为 500ns至 700ns。
6、 一种检测上行光信号的功率的装置， 其特征在于， 包括：
生成模块， 用于对于待检测的多个上行光信号中的每个上行光信号， 分 别生成所述每个上行光信号的用于检测光功率的触发信号， 所述每个上行光 信号的触发信号具有相同的持续时间；
检测模块， 用于在所述生成模块生成的所述每个上行光信号的触发信号 的持续时间内， 分别检测所述每个上行光信号的功率。
7、 根据权利要求 6所述的装置， 其特征在于， 所述装置还包括： 第一确定模块， 用于分别确定多个上行光信号中的每个上行光信号的上 行带宽与带宽阈值的大小关系；
第二确定模块， 用于将上行带宽大于或等于所述带宽阈值的多个上行光 信号确定为所述待检测的多个上行光信号， 其中， 与所述带宽阈值相应的上 行持续时间大于或等于所述触发信号的持续时间。
8、 根据权利要求 6或 7所述的装置， 其特征在于， 所述生成模块包括： 第一确定单元， 用于根据所述每个上行光信号的起始时刻， 分别确定所 述每个上行光信号的检测时刻；
第一生成单元， 用于在所述第一确定单元确定的所述每个上行光信号的 检测时刻， 分别生成所述每个上行光信号的用于检测光功率的触发信号。
9、 根据权利要求 6或 7所述的装置， 其特征在于， 所述生成模块包括： 第二确定单元， 用于根据所述每个上行光信号的终止时刻和所述持续时 间， 分别确定所述每个上行光信号的检测时刻；
第二生成单元， 用于在所述第二确定单元确定的所述每个上行光信号的 检测时刻， 分别生成所述每个上行光信号的用于检测光功率的触发信号。
10、 根据权利要求 6至 9中任意一项所述的装置， 其特征在于， 所述触 发信号的持续时间的取值范围为 400ns至 800ns; 或者为 500ns至 700ns。
11、 一种光线路终端 OLT, 包括媒体接入控制 MAC模块和光模块， 其 特征在于，
所述 MAC模块包括控制模块， 所述控制模块用于对待检测的多个上行 光信号中的每个上行光信号， 分别生成所述每个上行光信号的用于检测光功 率的触发信号， 所述每个上行光信号的触发信号具有相同的持续时间；
所述光模块包括光功率检测模块， 所述光功率检测模块接收所述控制模 块生成的所述每个上行光信号的触发信号， 并在所述每个上行光信号的触发 信号的持续时间内， 分别检测所述每个上行光信号的功率。
12、 根据权利要求 11 所述的光线路终端， 其特征在于， 在所述控制模 块分别生成所述每个上行光信号的用于检测光功率的触发信号之前， 所述控 制模块还用于：
分别确定多个上行光信号中的每个上行光信号的上行带宽与带宽阈值 的大小关系；
将上行带宽大于或等于所述带宽阈值的多个上行光信号确定为所述待 检测的多个上行光信号， 其中， 与所述带宽阈值相应的上行持续时间大于或 等于所述触发信号的持续时间。
13、 根据权利要求 11或 12所述的光线路终端， 其特征在于， 所述控制 模块具体用于： 根据所述每个上行光信号的起始时刻， 分别确定所述每个上 行光信号的检测时刻； 在所述每个上行光信号的检测时刻， 分别生成所述每 个上行光信号的用于检测光功率的触发信号。
14、 根据权利要求 11或 12所述的光线路终端， 其特征在于， 所述控制 模块具体用于： 根据所述每个上行光信号的终止时刻和所述持续时间， 分别 确定所述每个上行光信号的检测时刻； 在所述每个上行光信号的检测时刻， 分别生成所述每个上行光信号的用于检测光功率的触发信号。
15、根据权利要求 11至 14中任意一项所述的光线路终端，其特征在于， 所述 MAC模块还包括：
动态带宽分配 DBA模块， 用于给与所述 OLT连接的光网络终端 ONT 分配上行带宽； 和
处理模块， 用于将所述 DBA模块分配的所述上行带宽通过数据通道发 送给所述 ONT, 以及通过所述数据通道接收所述光模块发送的上行数据； 所述处理模块还用于向所述光模块发送控制信号， 以控制所述光模块接 收或发送光信号。
16、根据权利要求 11至 15中任意一项所述的光线路终端，其特征在于， 所述光模块还包括： 控制电路、 驱动电路和发射机， 其中， 所述控制电路根 据所述 MAC模块发送的控制信号， 控制所述驱动电路， 以驱动所述发射机 向与所述 OLT连接的 ONT发送下行光信号。
17、根据权利要求 11至 16中任意一项所述的光线路终端，其特征在于， 所述光模块还包括： 接收机和放大电路， 其中， 所述接收机用于接收与所述 OLT连接的 ONT发送的上行光信号， 并将所述上行光信号转换为电信号后 输出至所述放大电路和 /或所述光功率检测模块；所述放大电路将所述电信号 放大后输出至所述 MAC模块； 所述光功率检测模块根据所述控制模块生成 的触发信号， 检测上行光信号的功率。
18、 根据权利要求 17所述的光线路终端， 其特征在于， 所述光功率检 测模块包括充放电电路， 所述充放电电路在所述控制模块生成的所述触发信 号的触发下， 在所述触发信号的持续时间内， 由所述电信号对所述充放电电 路进行充电；
其中， 所述 MAC模块还用于获取所述充放电电路充电后的电压值， 并 根据所述电压值确定所述接收机接收的上行光信号的功率。
19、根据权利要求 11至 18中任意一项所述的光线路终端，其特征在于， 所述光模块还包括合路器， 所述合路器用于将所述光模块发射的下行光信号 以及接收的上行光信号进行合波， 并输出至主干光纤。
20、根据权利要求 11至 19中任意一项所述的光线路终端，其特征在于， 所述触发信号的持续时间的取值范围为 400ns 至 800ns; 或者为 500ns 至 700ns
21、 一种光线路终端 OLT, 其特征在于， 所述光线路终端用于执行下面 的方法：
对于待检测的多个上行光信号中的每个上行光信号，分别生成所述每个 上行光信号的用于检测光功率的触发信号， 所述每个上行光信号的触发信号 具有相同的持续时间；
在所述每个上行光信号的触发信号的持续时间内， 分别检测所述每个上 行光信号的功率。
22、 根据权利要求 21所述的光线路终端， 其特征在于， 在所述光线路 终端分别生成所述每个上行光信号的用于检测光功率的触发信号之前， 所述 光线路终端还用于执行下面的方法：
分别确定多个上行光信号中的每个上行光信号的上行带宽与带宽阈值 的大小关系；
将上行带宽大于或等于所述带宽阈值的多个上行光信号确定为所述待 检测的多个上行光信号， 其中， 与所述带宽阈值相应的上行持续时间大于或 等于所述触发信号的持续时间。
23、 根据权利要求 21或 22所述的光线路终端， 其特征在于， 所述光线 路终端分别生成所述每个上行光信号的用于检测光功率的触发信号， 包括： 根据所述每个上行光信号的起始时刻，分别确定所述每个上行光信号的 检测时刻；
在所述每个上行光信号的检测时刻 , 分别生成所述每个上行光信号的用 于检测光功率的触发信号。
24、 根据权利要求 21或 22所述的光线路终端， 其特征在于， 所述光线 路终端分别生成所述每个上行光信号的用于检测光功率的触发信号， 包括： 根据所述每个上行光信号的终止时刻和所述持续时间， 分别确定所述每 个上行光信号的检测时刻；
在所述每个上行光信号的检测时刻 , 分别生成所述每个上行光信号的用 于检测光功率的触发信号。
25、根据权利要求 21至 24中任意一项所述的光线路终端，其特征在于， 所述触发信号的持续时间的取值范围为 400ns 至 800ns; 或者为 500ns 至 700ns
26、 一种检测上行光信号的功率的装置， 其特征在于， 所述装置包括处 理器、存储器和总线系统，所述处理器和所述存储器通过所述总线系统相连， 所述存储器用于存储指令， 所述处理器用于执行所述存储器存储的指令， 其中， 所述处理器用于： 对于待检测的多个上行光信号中的每个上行光 信号， 分别生成所述每个上行光信号的用于检测光功率的触发信号， 所述每 个上行光信号的触发信号具有相同的持续时间；
所述处理器还用于： 在所述每个上行光信号的触发信号的持续时间内， 分别检测所述每个上行光信号的功率。
27、 根据权利要求 26所述的装置， 其特征在于， 在所述处理器分别生 成所述每个上行光信号的用于检测光功率的触发信号之前， 所述处理器还用 于：
分别确定多个上行光信号中的每个上行光信号的上行带宽与带宽阈值 的大小关系；
将上行带宽大于或等于所述带宽阈值的多个上行光信号确定为所述待 检测的多个上行光信号， 其中， 与所述带宽阈值相应的上行持续时间大于或 等于所述触发信号的持续时间。
28、 根据权利要求 26或 27所述的装置， 其特征在于， 所述处理器分别 生成所述每个上行光信号的用于检测光功率的触发信号， 包括：
根据所述每个上行光信号的起始时刻，分别确定所述每个上行光信号的 检测时刻；
在所述每个上行光信号的检测时刻 , 分别生成所述每个上行光信号的用 于检测光功率的触发信号。
29、 根据权利要求 26或 27所述的装置， 其特征在于， 所述处理器分别 生成所述每个上行光信号的用于检测光功率的触发信号， 包括：
根据所述每个上行光信号的终止时刻和所述持续时间， 分别确定所述每 个上行光信号的检测时刻；
在所述每个上行光信号的检测时刻 , 分别生成所述每个上行光信号的用 于检测光功率的触发信号。
30、 根据权利要求 26至 29中任意一项所述的装置， 其特征在于， 所述 触发信号的持续时间的取值范围为 400ns至 800ns; 或者为 500ns至 700ns。
31、 一种光网络系统， 其特征在于， 所述光网络系统包括：
根据权利要求 11至 25中任一项所述的光线路终端 OLT;
至少一个光网络终端 ONT; 以及
分光器，
其中， 所述至少一个 ONT通过所述分光器与所述 OLT连接。
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