WO2021253878A1 - 端口识别的方法, 装置和系统 - Google Patents

端口识别的方法, 装置和系统 Download PDF

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Publication number
WO2021253878A1
WO2021253878A1 PCT/CN2021/079724 CN2021079724W WO2021253878A1 WO 2021253878 A1 WO2021253878 A1 WO 2021253878A1 CN 2021079724 W CN2021079724 W CN 2021079724W WO 2021253878 A1 WO2021253878 A1 WO 2021253878A1
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Prior art keywords
port
wavelength
optical splitter
target
odn
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PCT/CN2021/079724
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English (en)
French (fr)
Inventor
董振华
董小龙
祁彪
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华为技术有限公司
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Priority to EP21824924.1A priority Critical patent/EP4149117A4/en
Priority to JP2022577460A priority patent/JP7493064B2/ja
Publication of WO2021253878A1 publication Critical patent/WO2021253878A1/zh
Priority to US18/067,722 priority patent/US12101117B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • 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
    • H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
    • 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
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0202—Arrangements therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0282—WDM tree architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0007—Construction
    • H04Q2011/0015—Construction using splitting combining
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H04Q2011/0083—Testing; Monitoring

Definitions

  • This application relates to the field of optical communication technology, and in particular to a method, device and system for port identification.
  • the passive optical network system includes an optical line terminal (OLT), an optical distribution network (Optical Distribution Network, ODN), and multiple optical access network user terminals.
  • the optical access network user terminal adopts an optical network unit (Optical Network Unit). Unit, ONU) or Optical Network Terminal (ONT), ODN is generally divided into four parts, namely splitter, backbone fiber, distribution fiber and branch fiber. Trunk fiber refers to the fiber between the OLT and ODN, and the distribution fiber Refers to the optical fiber between the various levels of optical splitters, and the branch fiber refers to the optical fiber between the optical splitter and the user terminal of the optical access network.
  • Trunk fiber refers to the fiber between the OLT and ODN
  • the distribution fiber refers to the optical fiber between the various levels of optical splitters
  • the branch fiber refers to the optical fiber between the optical splitter and the user terminal of the optical access network.
  • ODN realizes the transmission of optical signals from OLT to multi-user terminals through a point-to-multipoint connection method, it has the characteristics of wide coverage, a large number of branch circuits, and complex scenarios. In addition, it has no power supply itself, which causes It is difficult to identify the port connection relationship of the optical splitter in ODN.
  • ODN includes a two-stage optical splitter, the first-stage optical splitter is a 1*8 optical splitter, the second-stage optical splitter is 8 1*8 optical splitters, and the first-stage optical splitter is a 1*8 optical splitter.
  • the center wavelengths of the 8-port reflective parts are ⁇ 1 to ⁇ 8, and the center wavelengths of the 8-port reflective parts of each 1*8 optical splitter of the second-stage optical splitter are ⁇ 9 to ⁇ 16.
  • the tunable OTDR transmits the test optical signals of ⁇ 1 to ⁇ 8 and ⁇ 9 to ⁇ 16 respectively, and the ONT connected to the second-stage optical splitter determines the optical power of the test optical signal it receives, and the wavelength of the test optical signal with the smallest optical power corresponds to The port is the port to which the ONT is connected.
  • the port to which the ONT is connected is determined based on the optical power of the test optical signal received by the ONT. Since the optical power of the test optical signal received by the ONT is controlled by the reflection component set at the port, the accuracy of the center wavelength of the reflection component is very important.
  • the optical splitter in the ODN may be deployed outdoors, and the center wavelength of the reflective component may be shifted. In this way, the tunable OTDR sends out a test light signal of the center wavelength calibrated by the reflective component, and the reflective component does not reflect the center wavelength. Therefore, the ONT actually connected to the port will receive the test optical signal of the center wavelength, so that it is determined that the ONT is not connected to the port, which leads to an error in determining the connected port.
  • the embodiments of the present application provide a method, device, and system for port identification, and the port to which an ONT is connected can be accurately identified by using the present application.
  • a method for port identification includes: obtaining a first wavelength corresponding to at least one optical splitter in an ODN.
  • the reflection component of the target port reflects the wavelength corresponding to the test optical signal with the highest received power; according to the first wavelength corresponding to the at least one optical splitter and the calibration center wavelength of the reflection component of the target port of the at least one optical splitter, each of the at least one optical splitter is determined
  • the offset of the center wavelength of the reflective component of the port according to the offset of the center wavelength of the reflective component of each port of the at least one optical splitter, determine the current center wavelength of the reflective component of each port of the at least one optical splitter;
  • the current center wavelength of the reflective component of each port of an optical splitter determines the port to which the target ONT is connected in the ODN.
  • the port identification method can be executed by the port identification device.
  • the port identification device determines the port that the ONT is connected to in the ODN, for any one of the at least one optical splitter, the optical splitter Different ports are provided with different reflective components, and each reflective component can be any component that can reflect a test light signal of a certain wavelength, such as a reflective grating.
  • the device for port identification can obtain the wavelength of the test optical signal with the highest reflectivity reflected by the reflection component of the target port of the optical splitter, that is, obtain the optical splitter Corresponding to the first wavelength.
  • the port identification device can obtain the calibration center wavelength of the reflective component of the target port of the optical splitter. Then the port identification device uses the first wavelength corresponding to the optical splitter and the calibration center wavelength of the reflective component of the target port of the optical splitter to determine the offset of the center wavelength of the reflective component of each port of the optical splitter. For any optical splitter in the at least one optical splitter, the port identification device can use this method to determine the offset of the center wavelength of the reflective component of each port of the at least one optical splitter.
  • the device for port identification can add the offset of the center wavelength of the reflective component of each port of the optical splitter to the calibration center wavelength of the reflective component of each port of the optical splitter to obtain The current center wavelength of the reflective component of each port of the optical splitter.
  • the tunable OTDR can sequentially send out test optical signals of the current center wavelength of the reflective component set at each port of the at least one optical splitter according to a preset sequence.
  • the test optical signals of these wavelengths are transmitted by the ODN, and the target ONT can detect the received power of the received test optical signals of various center wavelengths. The target ONT then sends these received powers to the device identified by the port in the order of detection.
  • the device for port identification can determine the center wavelength corresponding to each received power, and determine the port to which the target ONT is connected in the ODN according to the center wavelength corresponding to each received power. In this way, since the current center wavelength of the reflective component can be obtained, the received power of the test optical signal received by the target ONT accurately corresponds to the wavelength, and the determined port that the ONT is connected to in the ODN can be more accurate.
  • acquiring the first wavelengths respectively corresponding to at least one optical splitter in the ODN includes:
  • each first correspondence is the transmission distance and backscatter of the test optical signals of multiple wavelengths when transmitted in the ODN.
  • the multiple wavelengths include the second wavelength, and the second wavelength is the calibrated center wavelength of the reflective part of any port of the optical splitter.
  • Other wavelengths are determined according to the second wavelength and the target adjustment value; for each optical splitter, among the multiple first correspondences corresponding to the optical splitter, determine the second wavelength with the largest received power at the position of the reflection component of the target port of the optical splitter.
  • the wavelength corresponding to the first correspondence relationship with the largest received power is determined as the first wavelength corresponding to the optical splitter.
  • the tunable OTDR can emit a test optical signal of the center wavelength (ie, the second wavelength) of the reflective component of the target port of the target optical splitter , And record the emission time of the second wavelength test light signal.
  • the tunable OTDR records the correspondence between the received power of the test optical signal of the second wavelength and the receiving time.
  • the adjustable OTDR can determine the difference between each receiving time and transmitting time, and then determine the transmission distance corresponding to each difference.
  • the tunable OTDR can adjust the second wavelength to the target adjustment value to obtain the third wavelength, and then the tunable OTDR can send out a test optical signal of the third wavelength, and record the first correspondence corresponding to the third wavelength.
  • the tunable OTDR adjusts the target adjustment value on the basis of the third wavelength to obtain the fourth wavelength, and then the tunable OTDR can send out a test optical signal of the fourth wavelength, and record the first corresponding relationship corresponding to the fourth wavelength.
  • the adjustable OTDR can always adjust the wavelength of the test optical signal until the adjustable OTDR finds the first wavelength corresponding to the target optical splitter. Then the adjustable OTDR can send multiple first correspondences corresponding to the target optical splitter to the port identification device, and the port identification device may determine the reflective part of the target port of the target optical splitter in the multiple first correspondences The first corresponding relationship with the largest received power at the location determines the wavelength corresponding to the first corresponding relationship with the largest received power as the first wavelength corresponding to the target optical splitter. In this way, since the wavelength corresponding to the position where the received power is the largest is selected, the first wavelength corresponding to the target optical splitter is relatively determined.
  • determining the port that the target ONT is connected to in the ODN includes: acquiring multiple sets of sub-wavelength test optical signals in the ODN During medium transmission, the first power detected by the target ONT. Each group of sub-wavelengths is determined according to the current center wavelength of the reflective part of one port of at least one optical splitter.
  • the port of is the port to which the center wavelength corresponding to the sub-wavelength of the target group belongs.
  • the tunable OTDR can determine a group of sub-wavelengths corresponding to the current central wavelength according to the current central wavelength of the reflective component of each port. Then the tunable OTDR can send out a set of sub-wavelength test optical signals corresponding to the current center wavelength of each reflective component in a preset sequence. And the adjustable OTDR can notify the port identification device of the preset sequence.
  • the test optical signal of any sub-wavelength is transmitted in the ODN, and the ONT connected to the ODN can detect the first power of the test optical signal received by itself. The target ONT sends each detected first power to the device identified by the port.
  • the device for port identification can obtain the first power detected by the target ONT when multiple sets of sub-wavelengths are transmitted in the ODN.
  • the port identification device can determine whether there is a first power smaller than the target threshold among the plurality of first powers corresponding to each group of sub-wavelengths, and if there is a first power smaller than the target threshold among the plurality of first powers corresponding to the target group of sub-wavelengths The first power, the port identification device can determine that the port connected to the target ONT in the ODN is the port to which the center wavelength corresponding to the target group sub-wavelength belongs, that is, the port where the reflective component belongs to the current center wavelength of the target group sub-wavelength . In this way, when the port is identified, the test optical signal of one wavelength is converted into the test optical signal of multiple sub-wavelengths for identification, so the port identification accuracy can be improved.
  • the deviation of the center wavelength of the reflective component of each port of the at least one optical splitter is determined.
  • the amount of shift includes: for each splitter, the difference between the first wavelength corresponding to the splitter and the calibrated center wavelength of the reflective component of the target port of the splitter is determined as the deviation of the center wavelength of the reflective component of each port of the splitter. Shift amount.
  • the device for port identification can determine the difference between the first wavelength corresponding to the splitter and the calibration center wavelength of the reflective component of the target port of the splitter, and determine the difference It is the shift amount of the center wavelength of the reflective part of each port of the optical splitter. Since the reflection parts of all ports under the same optical splitter are relatively close, the temperature changes of the reflection parts of all ports are the same, so only the center wavelength offset of the reflection part of one port (ie, the target port) needs to be tested. Then the current center wavelength of the reflective components of all ports under the optical splitter can be obtained.
  • a port identification system is provided, which is applied to ODN, and the system includes adjustable OTDR and OLT;
  • the tunable OTDR is used to output test optical signals of multiple wavelengths
  • the adjustable OTDR is also used to detect the receiving power and receiving time of the received test optical signal
  • a communication connection between the OLT and the adjustable OTDR is established
  • the OLT is used to execute the method described in the first aspect.
  • a device for port identification includes a plurality of modules that execute instructions to implement the method for port identification provided in the first aspect.
  • a port identification device in a fourth aspect, includes a processor and a memory, wherein:
  • Computer instructions are stored in the memory
  • the processor executes the computer instructions to implement the method described in the first aspect.
  • a computer-readable storage medium stores computer instructions.
  • the port identification device executes the method described in the first aspect.
  • the present application provides a computer program product.
  • the computer program product includes computer instructions.
  • the port recognition device executes the port recognition described in the first aspect. Methods.
  • Fig. 1 is a schematic diagram of an application scenario provided by an exemplary embodiment of the present application
  • Fig. 2 is a schematic structural diagram of an adjustable OTDR provided by an exemplary embodiment of the present application
  • Fig. 3 is a schematic structural diagram of an adjustable OTDR provided by an exemplary embodiment of the present application.
  • Fig. 4 is a schematic structural diagram of an adjustable OTDR provided by an exemplary embodiment of the present application.
  • Fig. 5 is a schematic structural diagram of a port identification device provided by an exemplary embodiment of the present application.
  • FIG. 6 is a schematic flowchart of a port identification method provided by an exemplary embodiment of the present application.
  • FIG. 7 is a schematic diagram of the first correspondence provided by an exemplary embodiment of the present application.
  • FIG. 8 is a schematic diagram of power detected by an ONT according to an exemplary embodiment of the present application.
  • Fig. 9 is a schematic structural diagram of a port identification device provided by an exemplary embodiment of the present application.
  • Trunk fiber refers to the fiber between OLT and ODN
  • distribution fiber refers to the fiber between various levels of optical splitters
  • branch fiber refers to the fiber between the splitter and the user terminal of the optical access network.
  • Fig. 1 is a structural diagram of an ODN with two-stage light splitting. For an ODN with only one-stage light splitting, there are only main fibers and branch fibers.
  • the ODN is composed of passive components, it is difficult to identify the ports connected by the ONT in the ODN.
  • different reflecting components are provided for different ports of the optical splitter, specifically, reflecting components with different central wavelengths are set at different ports of each optical splitter of each stage of the ODN, and the ports of the optical splitter of each stage are set
  • the center wavelengths of the reflective parts are not the same.
  • the ONT connected to the ODN determines the port to which it is connected based on the power of the received test optical signal. Since the optical splitter in the ODN may be deployed outdoors, the center wavelength of the reflective component may shift.
  • the tunable OTDR sends out a test light signal of the center wavelength calibrated by the reflective component, and the reflective component does not reflect the center wavelength.
  • the optical signal is tested, so the ONT actually connected to the port will receive the test optical signal of the center wavelength, so that it is determined that the ONT is not connected to the port, which leads to an error in determining the connected port.
  • the embodiments of the present application provide a method for port identification.
  • the execution subject of the method may be a port identification device, and the port identification device may be a hardware device or a software device.
  • the port recognition device is a hardware device
  • the port recognition device can be called a port recognition device
  • the port recognition device can be an OLT, etc., specifically, it can be a method of performing port recognition on a single board in the OLT;
  • the device is a software device, it may be a software module deployed on the OLT.
  • the PON system also includes a device for transmitting test light signals.
  • the device can not only transmit test light signals, but also detect the received power of the test light signals reflected by the reflective component (the reflective component may be a reflective grating).
  • the device for transmitting the test optical signal may be an adjustable OTDR, and the adjustable OTDR is an OTDR with adjustable wavelength.
  • the tunable OTDR is based on the original OTDR, so that the OTDR can emit test optical signals of multiple wavelengths, the multiple wavelengths including the central wavelength of the reflective component set at the port of the optical splitter in the ODN.
  • the adjustable OTDR can also detect the receiving power and receiving time of the received test optical signal.
  • the receiving power here is because when the test optical signal is transmitted in the ODN, it is reflected or scattered by the optical fiber in the ODN (the scattering can be Backscatter) back to the adjustable OTDR, or reflected back to the adjustable OTDR by the reflective part set at the port of the optical splitter in the ODN.
  • a schematic diagram of a tunable OTDR is also provided, including a tunable wavelength laser, a combiner/splitter (such as a coupler) or circulator, receiving components, and a processor.
  • the tunable wavelength laser is connected to the processor, and the processor is connected to the receiving part.
  • the tunable wavelength laser is used to output test optical signals of multiple wavelengths, and the combiner/splitter or circulator is used to send test optical signals. And to receive the test light signal, the receiving component is used to detect the received power, and the processor is used to record the receiving time and so on. Only some of the devices are shown in FIG. 2.
  • the test optical signal when used to detect the offset of the center wavelength of the reflective component, the test optical signal may be a pulsed optical signal.
  • the tunable wavelength laser generates a direct-current optical signal, and the optical pulse signal is generated by the optical modulator, and then the pulsed optical signal is output to the combiner/splitter.
  • the processor generates electrical pulse signals, and drives the optical modulator to generate optical pulse signals through the driver, or the processor generates control signals, controls the driver to generate electrical pulse signals, and the electrical pulse signals drive the optical modulator to generate light. Pulse signal.
  • tunable wavelength lasers can also directly generate pulsed optical signals, so the output to the combiner/splitter is a pulsed optical signal.
  • the processor generates an electrical pulse signal, which is amplified by the driver to drive the optical modulator to generate an optical pulse signal.
  • the processor generates a control signal, controls the driver to generate an electric pulse signal, and the electric pulse signal drives a tunable wavelength laser to generate an optical pulse signal.
  • the test optical signal when the test optical signal is a test optical signal used to determine the connection relationship between the ONT and the port of the optical splitter, the test optical signal may be a pulse test optical signal or a DC test optical signal, which is not limited in the embodiment of the present application. If the test optical signal is a DC optical signal, corresponding to Figure 3, the tunable wavelength laser directly generates a DC optical signal, and the optical modulator does not modulate the DC optical signal. If the test optical signal is a DC optical signal, corresponding to Figure 4, the tunable wavelength laser directly generates a DC optical signal.
  • a device for combining service optical signals such as a wavelength division multiplexer, can be set between the adjustable OTDR and ODN. Wait. At this time, when the service optical signal is sent between the OLT and the ODN, it also passes through the device.
  • the port recognition device when the port recognition device is a port recognition device, the port recognition device includes a memory 501 and a processor 502.
  • the memory 501 may be a read-only memory (Read-Only Memory, ROM), a static storage device, a dynamic storage device, and the like.
  • the memory 501 may store computer instructions. When the computer instructions stored in the memory 501 are executed by the processor 502, the processor 502 is used to execute the port identification method.
  • the memory can also store data.
  • the processor 502 may adopt a general central processing unit (Central Processing Unit, CPU), an application ASIC, a graphics processing unit (Graphics Processing Unit, GPU), or any combination thereof.
  • the processor 502 may include one or more chips.
  • the execution flow of the port identification method is provided, and the port identification device is the OLT:
  • Step 601 The device for port identification obtains the first wavelength corresponding to at least one optical splitter in the ODN.
  • the first wavelength is the received power after being reflected by the reflective part of the target port of the optical splitter during transmission in the ODN The wavelength corresponding to the largest test optical signal.
  • the target port is any port of the optical splitter.
  • the device for port identification determines the port to which the ONT is connected in the ODN
  • at least one optical splitter in the ODN is multiple optical splitters
  • Different reflective components are provided at different ports of the optical splitter, and each reflective component can be any component that can reflect a test light signal of a certain wavelength, such as a reflective grating.
  • at least one optical splitter in the ODN is an optical splitter
  • different ports of the one optical splitter are provided with different reflective components
  • each reflective component can be any component that can reflect a test optical signal of a certain wavelength, Such as reflection grating and so on.
  • the device for port identification can obtain the wavelength of the test optical signal with the highest reflectivity reflected by the reflection component of the target port of the optical splitter, that is, obtain the optical splitter Corresponding to the first wavelength. Then, the wavelength corresponding to the test optical signal with the largest received power after being reflected by the reflective part of the target port during transmission in the ODN is obtained.
  • the device for port identification can obtain the first wavelengths respectively corresponding to at least one optical splitter in the ODN.
  • Step 602 For each optical splitter, the device for port identification determines the center wavelength of the reflective component of each port of the optical splitter according to the first wavelength corresponding to the optical splitter and the calibrated center wavelength of the reflective component of the target port of the optical splitter. Offset.
  • the calibrated center wavelength refers to the wavelength of the maximum reflected optical signal after the reflective component is manufactured.
  • the device for port identification can obtain the calibration center wavelength of the reflective component of the target port of the optical splitter. Then the port identification device uses the first wavelength corresponding to the optical splitter and the calibration center wavelength of the reflective component of the target port of the optical splitter to determine the offset of the center wavelength of the reflective component of each port of the optical splitter. For any optical splitter in the at least one optical splitter, the port identification device can use this method to determine the offset of the center wavelength of the reflective component of each port of the at least one optical splitter.
  • Step 603 The device for port identification determines the current center wavelength of the reflective component of each port of the at least one optical splitter according to the offset of the center wavelength of the reflective component of each port of the at least one optical splitter.
  • the device for port identification can calibrate the offset of the center wavelength of the reflective component of each port of the optical splitter and the calibration of the reflective component of each port of the optical splitter.
  • the center wavelengths are added to obtain the current center wavelengths of the reflective parts of each port of the optical splitter.
  • Step 604 The device for port identification determines the port to which the target ONT is connected in the ODN according to the current center wavelength of the reflective component of each port of at least one optical splitter in the ODN.
  • the target ONT can be any ONT connected to the ODN.
  • step 601 to step 603 determine the current center wavelength of the reflective component provided at each port of the at least one optical splitter.
  • the tunable OTDR can sequentially send out test optical signals of the current center wavelength of the reflective component set at each port of the at least one optical splitter according to a preset sequence.
  • the test optical signals of these wavelengths are transmitted by the ODN, and the target ONT can detect the received power of the received test optical signals of various center wavelengths.
  • the target ONT then sends these received powers to the device identified by the port in the order of detection.
  • the device for port identification can determine the center wavelength corresponding to each received power, calculate the difference between the maximum received power among the received powers and the remaining received power, and determine the received power with the difference greater than the first value.
  • the port where the reflective component belongs to the center wavelength corresponding to the received power whose difference is greater than the first value is determined as the port to which the target ONT is connected in the ODN.
  • the device for port identification may determine the center wavelength corresponding to the smallest received power among the received powers, and determine the port where the reflective component to which the center wavelength belongs is located as the port to which the target ONT is connected in the ODN.
  • the device for the target ONT to send the received power to the port identification can also be the port identification device that sets the above-mentioned preset sequence and the ports corresponding to various center wavelengths (that is, the port where the reflective component belongs to the center wavelength) Send to the target ONT.
  • the target ONT determines the port to which the target ONT is connected in the ODN in the above-mentioned manner. After the target ONT determines the port it is connected to in the ODN, it can send the port it is connected to in the ODN to the device identified by the port.
  • the determined port that the ONT is connected to in the ODN can be more accurate.
  • the device for port identification may obtain the first wavelength in the following manner, and the processing is as follows:
  • the device for port identification acquires multiple first correspondences corresponding to at least one optical splitter in the ODN.
  • each first correspondence is the transmission distance when the test optical signals of multiple wavelengths are respectively transmitted in the ODN.
  • multiple wavelengths include a second wavelength, the second wavelength is the calibrated center wavelength of the reflective part of any port of the optical splitter, and the multiple wavelengths except the first The wavelengths other than the second wavelength are determined according to the second wavelength and the target adjustment value.
  • the position of the reflection component of the target port of the splitter determines the position of the reflection component of the target port of the splitter
  • the first corresponding relationship with the largest received power at, and the wavelength corresponding to the first corresponding relationship with the largest received power is determined as the first wavelength corresponding to the optical splitter.
  • the target adjustment value can be preset to adjust the wavelength of the test optical signal, and the value of the target adjustment value determines the adjustment range of the wavelength of the test optical signal.
  • the target port is any port of the optical splitter.
  • the tunable OTDR can emit a test optical signal at the center wavelength (ie, the second wavelength) of the reflective part of the target port of the target optical splitter, and record the emission time of the test optical signal at the second wavelength.
  • the tunable OTDR records the correspondence between the received power of the test optical signal of the second wavelength and the receiving time.
  • c represents the speed of light
  • t represents the difference
  • n represents the refractive index of the optical fiber in the ODN.
  • the corresponding relationship between the transmission distance and the reception power when the test optical signal of the second wavelength is transmitted in the ODN (that is, the corresponding relationship of the second wavelength is obtained)
  • the first correspondence For example, assuming that the ODN includes an optical splitter, the second wavelength of the center wavelength of the reflective part of the target port of the optical splitter, and the first corresponding relationship corresponding to the second wavelength is shown in FIG. 7.
  • the tunable OTDR can adjust the second wavelength to the target adjustment value to obtain the third wavelength, and then the tunable OTDR can send out a test optical signal of the third wavelength, and record the first correspondence corresponding to the third wavelength.
  • the tunable OTDR adjusts the target adjustment value on the basis of the third wavelength to obtain the fourth wavelength, and then the tunable OTDR can send out a test optical signal of the fourth wavelength, and record the first corresponding relationship corresponding to the fourth wavelength.
  • the adjustable OTDR can always adjust the wavelength of the test optical signal until the port identification device finds the first wavelength corresponding to the target optical splitter. It should be noted here that the target adjustment value can be adjusted to increase the wavelength or decrease the wavelength.
  • the adjustable OTDR can send multiple first correspondences corresponding to the target optical splitter to the port identification device, and the port identification device may determine the reflective part of the target port of the target optical splitter in the multiple first correspondences
  • the first corresponding relationship with the largest received power at the location determines the wavelength corresponding to the first corresponding relationship with the largest received power as the first wavelength corresponding to the target optical splitter.
  • the position of the reflective part of the target port of the target beam splitter is actually a position at a distance between the reflective part of the target port and the adjustable OTDR.
  • the port identification device can also use the target adjustment value to adjust the second wavelength, indicating the wavelength of the test optical signal sent by the adjustable OTDR. After the port identification device determines the first wavelength corresponding to the target optical splitter, the port identification The device may instruct the tunable OTDR to send out a test optical signal used to determine the first wavelength corresponding to other optical splitters.
  • “at least one” includes one or more two cases.
  • the port identification The device may use the foregoing method to determine the first wavelength corresponding to the other optical splitters in the at least one optical splitter.
  • the port identification device can determine based on the above-mentioned first correspondence relationship. The first wavelength corresponding to the optical splitter. If the calibrated center wavelengths of the reflective components of the ports of different optical splitters in the same class of optical splitters are the same, and the distance between the different optical splitters and the adjustable OTDR is not the same, the port identification device can also be based on the above-mentioned first The corresponding relationship determines the first wavelength corresponding to the optical splitter.
  • the optical splitter cannot be determined based on the above-mentioned first correspondence. Corresponding to the first wavelength, this is because it is impossible to distinguish which optical splitter the first wavelength corresponds to.
  • the calibrated center wavelengths of the reflective parts of the ports of different splitters in the same class of optical splitters are different, which means: splitter 1 and splitter 2 belong to the second-stage splitter, and both splitter 1 and splitter 2 are 1*
  • the calibrated center wavelengths of the reflective components of the two ports of the optical splitter 1 are wavelength 1 and wavelength 2
  • the calibrated center wavelengths of the reflective components of the two ports of the optical splitter 2 are wavelength 3 and wavelength 4.
  • the calibrated center wavelengths of the reflective components of the ports of different splitters in the same class of optical splitters are the same: the splitter 3 and the splitter 4 belong to the second-stage splitter, and the splitter 3 and the splitter 4 are both 1*2
  • the calibrated center wavelengths of the reflective components of the two ports of the optical splitter 3 are wavelength 1 and wavelength 2
  • the calibrated center wavelengths of the reflective components of the two ports of the optical splitter 4 are wavelength 1 and wavelength 2.
  • the port identification device may determine the offset of the center wavelength of the reflective component of each port of the optical splitter in the following manner:
  • the port identification device determines the difference between the first wavelength corresponding to the splitter and the calibrated center wavelength of the reflective part of the target port of the splitter as the offset of the center wavelength of the reflective part of each port of the splitter quantity.
  • the device for port identification can determine the difference between the first wavelength corresponding to the optical splitter and the calibration center wavelength of the reflective component of the target port of the optical splitter, and determine the difference as The shift amount of the center wavelength of the reflective part of each port of the optical splitter. Since the reflection parts of all ports under the same optical splitter are relatively close, the temperature changes of the reflection parts of all ports are the same, so only the center wavelength offset of the reflection part of one port (ie, the target port) needs to be tested. Then the current center wavelength of the reflective components of all ports under the optical splitter can be obtained.
  • step 604 in order to more accurately identify the port that the ONT is connected to in the ODN, the port that the ONT is connected to in the ODN can be determined as follows:
  • the device for port identification acquires the first power detected by the target ONT when multiple sets of sub-wavelength test optical signals are transmitted in the ODN.
  • Each set of sub-wavelengths is determined based on the current center wavelength of the reflective component of one port of at least one optical splitter , The distance between each sub-wavelength of any group of sub-wavelengths and the current center wavelength of the port corresponding to any group of sub-wavelengths is less than the target value; if there are multiple first powers corresponding to the target group of sub-wavelengths less than For the first power of the target threshold, it is determined that the port to which the target ONT is connected in the ODN is the port to which the center wavelength corresponding to the target group sub-wavelength belongs.
  • the target value can be preset.
  • the target threshold can be set in advance. When there are both service optical signals and test optical signals, it can be set to the power of the service optical signals reaching the ONT. When only the test optical signals are present, it can be set to a preset value. This preset value is compared small.
  • the tunable OTDR can determine a group of sub-wavelengths corresponding to the current center wavelength according to the current center wavelength of the reflection component of each port. Specifically, for the current center wavelength of the reflective component of any port, the tunable OTDR can determine the sum of the current center wavelength and the target value, obtain the second value, and determine the difference between the current center wavelength and the target value, Get the third value.
  • the tunable OTDR takes a preset number of wavelengths at equal intervals between the second value and the third value (the preset number may be 10, etc.), and the preset number of wavelengths may include the second value and the third value. Then the tunable OTDR can send out a set of sub-wavelength test optical signals corresponding to the current center wavelength of each reflective component in a preset sequence. And the adjustable OTDR can notify the port identification device of the preset sequence.
  • the test optical signal of any sub-wavelength is transmitted in the ODN, and the ONT connected to the ODN can detect the first power of the test optical signal received by itself. In this way, the first power of the test optical signal of each sub-wavelength in each group of sub-wavelengths can be detected for the target ONT.
  • the target ONT sends each detected first power to the device identified by the port. In this way, the device for port identification can obtain the first power detected by the target ONT when multiple sets of sub-wavelengths are transmitted in the ODN.
  • the ODN is connected to three ONTs (that is, ONT1, ONT2, and ONT3). For a group of sub-wavelengths corresponding to the center wavelength of the reflective component of the port connected to the ODN, all three ONTs can detect multiple wavelengths. One first power.
  • the port identification device can determine whether there is a first power smaller than the target threshold among the plurality of first powers corresponding to each group of sub-wavelengths, and if there is a first power smaller than the target threshold among the plurality of first powers corresponding to the target group of sub-wavelengths The first power, the port identification device can determine that the port connected to the target ONT in the ODN is the port to which the center wavelength corresponding to the target group sub-wavelength belongs, that is, the port where the reflective component belongs to the current center wavelength of the target group sub-wavelength .
  • the target ONT has failed to identify the port connected to the ODN.
  • the received power detected by the target ONT is less than the target threshold, it means that the test optical signal corresponding to the received power is reflected by the reflective component and will not reach the target ONT. Therefore, it can be determined that the target ONT is connected to the port where the reflective component is located. .
  • the test optical signal of one wavelength is converted into the test optical signal of multiple sub-wavelengths for identification, so the port identification accuracy can be improved.
  • the above is a set of sub-wavelengths corresponding to the current center wavelength of the reflective component determined by the tunable OTDR.
  • the port identification device can also be the port identification device in the same way as the tunable OTDR. Group sub-wavelength. Then the port identification device notifies the adjustable OTDR of the multiple sets of sub-wavelengths and the above-mentioned preset sequence.
  • the embodiments of the present application it is possible to calibrate the center wavelength of the reflective component provided at the port of at least one optical splitter in the ODN, so that the port to which the ONT is connected in the ODN can be identified more accurately.
  • the center wavelength of the reflective component can be calibrated in the embodiments of this application, it is not necessary to use a reflective component with a relatively large center wavelength interval (this is to prevent the center wavelength interval from being relatively small, which may cause different reflective components to reflect other components when the temperature changes.
  • the test optical signal of the center wavelength of the reflective component can make the center wavelength interval of each reflective component smaller, thereby reducing the scanning wavelength range of the tunable OTDR, reducing the manufacturing difficulty and cost of the tunable OTDR, and commercializing High feasibility.
  • Fig. 9 is a structural diagram of a port identification device provided by an embodiment of the present application.
  • the device can be implemented as part or all of the device through software, hardware, or a combination of the two.
  • the device is applied to ODN.
  • the device provided in the embodiment of this application can implement the flow described in Figure 6 of the embodiment of this application.
  • the device includes : Obtaining module 910 and determining module 920, where:
  • the obtaining module 910 is configured to obtain a first wavelength corresponding to at least one optical splitter in the ODN.
  • the first wavelength is the value of the target port of the optical splitter when being transmitted in the ODN.
  • the wavelength corresponding to the test optical signal with the highest received power after reflection by the reflective component can be specifically used to implement the acquisition function of step 601 and the implicit steps included in step 601;
  • the determining module 920 is configured to determine the center of the reflective component of each port of the at least one optical splitter according to the first wavelength corresponding to the at least one optical splitter and the calibration center wavelength of the reflective component of the target port of the at least one optical splitter Wavelength offset; according to the offset of the center wavelength of the reflective component of each port of the at least one optical splitter, determine the current center wavelength of the reflective component of each port of the at least one optical splitter; according to the at least one in the ODN
  • the current center wavelength of the reflective component of each port of an optical splitter determines the port that the target optical network terminal ONT is connected to in the ODN, which can be specifically used to implement the determination function from step 602 to step 604 and the implicit information contained in step 602 to step 604. With steps.
  • the obtaining module 910 is configured to:
  • each first correspondence is the transmission distance when test optical signals of multiple wavelengths are respectively transmitted in the ODN
  • the multiple wavelengths include a second wavelength
  • the second wavelength is the center wavelength of the reflective component of any port of the optical splitter
  • the multiple The wavelengths other than the second wavelength are determined according to the second wavelength and the adjustment value
  • each optical splitter in the at least one optical splitter determines the first correspondence that has the largest received power at the position of the reflective component of the port of the optical splitter, The wavelength corresponding to the first correspondence with the maximum received power is determined as the first wavelength corresponding to the optical splitter.
  • the determining module 920 is configured to:
  • each set of sub-wavelengths is based on the current center of the reflective component of one port of the at least one optical splitter. If the wavelength is determined, the distance between each sub-wavelength of any group of sub-wavelengths and the current center wavelength of the reflection component of the port corresponding to the any group of sub-wavelengths is less than the target value;
  • the port to which the target ONT is connected in the ODN is the port to which the center wavelength corresponding to the target group sub-wavelength belongs.
  • the determining module 920 is configured to:
  • the difference between the first wavelength corresponding to the optical splitter and the calibrated center wavelength of the reflective part of the target port of the optical splitter is determined as the center of the reflective part of each port of the optical splitter The offset of the wavelength.
  • the division of modules in the above embodiments of the present application is illustrative, and it is only a logical function division. In actual implementation, there may also be other division methods.
  • the functional modules in the various embodiments of the present application may be integrated in A processor may also exist alone physically, or two or more modules may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software function modules.
  • the computer program product includes one or more computer instructions, and when the computer program instructions are loaded and executed on the OLT, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer-readable storage medium may be any available medium that can be accessed by the OLT or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (such as a floppy disk, a hard disk, a tape, etc.), an optical medium (such as a digital video disk (Digital Video Disk, DVD), etc.), or a semiconductor medium (such as a solid state hard disk, etc.).
  • a magnetic medium such as a floppy disk, a hard disk, a tape, etc.
  • an optical medium such as a digital video disk (Digital Video Disk, DVD), etc.
  • a semiconductor medium such as a solid state hard disk, etc.

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Abstract

本申请提供了一种端口识别的方法, 装置和系统, 属于光通信技术领域。该方法包括: 获取ODN中至少一个分光器分别对应的第一波长, 对于每个分光器, 第一波长为在ODN中传输时被该分光器的目标端口的反射部件反射后接收功率最大的测试光信号的波长, 根据分光器对应的第一波长和分光器的目标端口的反射部件的标定中心波长, 确定分光器各端口的反射部件的中心波长的偏移量, 根据分光器各端口对应的偏移量, 确定分光器各端口的反射部件当前的中心波长, 根据分光器各端口的反射部件当前的中心波长, 确定目标ONT在ODN中连接的端口。采用本申请, 可以准确的识别ONT与分光器的连接关系以及ONT与分光器的端口的连接关系。

Description

端口识别的方法、装置和系统
本申请要求于2020年6月18日提交中国国家知识产权局、申请号为202010559502.3、申请名称为“端口识别的方法、装置和系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及光通信技术领域，特别涉及一种端口识别的方法、装置和系统。
背景技术
无源光网络系统包括光线路终端(optical line terminal，OLT)、光分配网络(Optical Distribution Network，ODN)和多个光接入网络用户终端，光接入网络用户终端采用光网络单元(Optical Network Unit，ONU)或者光网络终端(Optical Network Terminal，ONT)，ODN一般分为四个部分，即分光器、主干光纤、分布光纤和分支光纤，主干光纤指OLT与ODN之间的光纤，分布光纤指各级分光器之间的光纤，分支光纤指分光器与光接入网络用户终端之间的光纤。由于ODN通过点对多点的连接方法实现光信号从OLT到多用户终端的传输，有着覆盖地域广泛、分支支路数量庞大、场景复杂等特点，再加上其自身没有供电，这就造成了ODN中分光器的端口连接关系比较难识别。
相关技术中，为分光器的不同端口设置不同的反射部件，通过可调的(Optical Time Domain Reflectometer，OTDR)识别ONT在ODN中连接的端口。具体是，在ODN的每一级的每个分光器的不同端口设置中心波长不同的反射部件，且每一级的分光器的端口设置的反射部件的中心波长不相同。例如，ODN包括两级分光器，第一级分光器为1*8的分光器，第二级分光器为8个1*8的分光器，第一级分光器的1*8的分光器的8个端口的反射部件的中心波长为λ1至λ8，第二级分光器的每个1*8的分光器的8个端口的反射部件的中心波长为λ9至λ16。通过可调的OTDR分别发射λ1至λ8、λ9至λ16的测试光信号，第二级分光器连接的ONT确定自身接收到的测试光信号的光功率中，光功率最小的测试光信号的波长对应的端口，即为ONT连接的端口。
在相关技术中，是基于ONT接收到的测试光信号的光功率，判断ONT连接的端口。由于ONT接收到的测试光信号的光功率是受端口设置的反射部件控制，所以反射部件的中心波长的准确度至关重要。然而ODN中的分光器有可能部署在室外，反射部件的中心波长有可能会发生偏移，这样在可调的OTDR发出反射部件标定的中心波长的测试光信号，该反射部件未反射该中心波长的测试光信号，所以实际连接在该端口的ONT会接收到该中心波长的测试光信号，使确定出该ONT未连接在该端口，从而导致确定连接的端口错误。
发明内容
本申请实施例提供了一种端口识别的方法、装置和系统，采用本申请可以准确的识别ONT连接的端口。
第一方面，提供了一种端口识别的方法，该方法包括：获取ODN中至少一个分光器分别 对应的第一波长，对于每个分光器，第一波长为在ODN中传输时被分光器的目标端口的反射部件反射后接收功率最大的测试光信号对应的波长；根据至少一个分光器对应的第一波长和至少一个分光器的目标端口的反射部件的标定中心波长，确定至少一个分光器各端口的反射部件的中心波长的偏移量；根据至少一个分光器各端口的反射部件的中心波长的偏移量，确定至少一个分光器各端口的反射部件当前的中心波长；根据ODN中的至少一个分光器各端口的反射部件当前的中心波长，确定目标ONT在ODN中连接的端口。
本申请所示的方案，端口识别的方法可以由端口识别的装置执行，端口识别的装置在确定ONT在ODN中连接的端口时，对于该至少一个分光器中的任一分光器，该分光器的不同端口设置有不同的反射部件，每个反射部件可以是任一种可以反射某种波长的测试光信号的部件，如反射光栅等。对于至少一个分光器中的每个分光器，端口识别的装置可以获取该分光器的目标端口的反射部件对测试光信号进行反射的反射率最大的测试光信号的波长，即获取到该分光器对应的第一波长。对于ODN中至少一个分光器中的每个分光器，端口识别的装置可以获取该分光器的目标端口的反射部件的标定中心波长。然后端口识别的装置使用该分光器对应的第一波长和该分光器的目标端口的反射部件的标定中心波长，确定该分光器各端口的反射部件的中心波长的偏移量。对于至少一个分光器中的任一分光器，端口识别的装置均使用该方式即可确定出至少一个分光器各端口的反射部件的中心波长的偏移量。对于至少一个分光器中的每个分光器，端口识别的装置可以将该分光器各端口的反射部件的中心波长的偏移量与该分光器各端口的反射部件的标定中心波长相加，获得该分光器各端口的反射部件当前的中心波长。可调的OTDR可以按照预设顺序，依次发出至少一个分光器各端口设置的反射部件当前的中心波长的测试光信号。这些波长的测试光信号经过ODN的传输，目标ONT可以检测接收到的各种中心波长的测试光信号的接收功率。然后目标ONT将这些接收功率按照检测到的顺序发送至端口识别的装置。端口识别的装置可以确定各接收功率对应的中心波长，根据各接收功率对应的中心波长，确定目标ONT在ODN中连接的端口。这样，由于能获取到反射部件当前的中心波长，所以目标ONT接收到的测试光信号的接收功率与波长准确对应，进而可以使确定出的ONT在ODN中连接的端口比较准确。
在一种可能的实现方式中，获取ODN中至少一个分光器分别对应的第一波长，包括：
获取ODN中至少一个分光器分别对应的多个第一对应关系，对于每个分光器，每个第一对应关系为多种波长的测试光信号分别在ODN中传输时的传输距离与背向散射和/或被反射后的接收功率的对应关系，多种波长包括第二波长，第二波长为分光器的任一端口的反射部件的标定中心波长，多种波长中除第二波长之外的其他波长是根据第二波长和目标调整值确定的；对于每个分光器，在分光器对应的多个第一对应关系中，确定分光器的目标端口的反射部件位置处的接收功率最大的第一对应关系，将接收功率最大的第一对应关系对应的波长，确定为分光器对应的第一波长。
本申请所示的方案，以至少一个分光器中的目标分光器为例进行描述：可调的OTDR可以发出目标分光器的目标端口的反射部件的中心波长(即第二波长)的测试光信号，并且记录发出第二波长的测试光信号的发射时间。可调的OTDR记录接收到的第二波长的测试光信号的接收功率与接收时间的对应关系。可调的OTDR可以确定每个接收时间与发射时间的差值，然后确定出每个差值对应的传输距离。由于传输距离与接收时间相对应，接收时间又与接收功率相对应，这样，即获得第二波长的测试光信号在ODN中传输时的传输距离与接收功率的对 应关系(即第二波长对应的第一对应关系)。然后可调的OTDR可以将第二波长调整目标调整值，获得第三波长，然后可调的OTDR可以发出第三波长的测试光信号，记录第三波长对应的第一对应关系。可调的OTDR在第三波长的基础上调整目标调整值，获得第四波长，然后可调的OTDR可以发出第四波长的测试光信号，记录第四波长对应的第一对应关系。可调的OTDR可以一直调整发出测试光信号的波长，直至可调的OTDR找到目标分光器对应的第一波长。然后可调的OTDR可以将目标分光器对应的多个第一对应关系，发送至端口识别的装置，端口识别的装置可以在多个第一对应关系中，确定目标分光器的目标端口的反射部件位置处的接收功率最大的第一对应关系，将该接收功率最大的第一对应关系对应的波长，确定为目标分光器对应的第一波长。这样，由于是选取接收功率最大的位置处对应的波长，所以目标分光器对应的第一波长比较确定。
在一种可能的实现方式中，根据ODN中的至少一个分光器各端口的反射部件当前的中心波长，确定目标ONT在ODN中连接的端口，包括：获取多组子波长的测试光信号在ODN中传输时，目标ONT分别检测到的第一功率，每组子波长是根据至少一个分光器的一个端口的反射部件当前的中心波长确定的，对于任一组子波长的各子波长与任一组子波长对应的端口的反射部件当前的中心波长的距离均小于目标数值；若目标组子波长对应的多个第一功率中存在小于目标阈值的第一功率，则确定目标ONT在ODN中连接的端口为目标组子波长对应的中心波长所属的端口。
本申请所示的方案，对于ODN中任一分光器各端口的反射部件，可调的OTDR可以根据各端口的反射部件当前的中心波长，确定该当前的中心波长对应的一组子波长。然后可调的OTDR可以按照预设顺序，发出每个反射部件当前的中心波长对应的一组子波长的测试光信号。并且可调的OTDR可以将该预设顺序通知给端口识别的装置。任一子波长的测试光信号在ODN中传输，ODN连接的ONT可以检测自身接收到的测试光信号的第一功率。目标ONT将检测到的每个第一功率发送至端口识别的装置。这样，端口识别的装置可以获取到多组子波长在ODN中传输时，被目标ONT检测到的第一功率。对于目标ONT，端口识别装置可以判断各组子波长对应的多个第一功率中是否存在小于目标阈值的第一功率，若在目标组子波长对应的多个第一功率中存在小于目标阈值的第一功率，则端口识别的装置可以确定目标ONT在ODN中连接的端口为目标组子波长对应的中心波长所属的端口，即为目标组子波长的当前的中心波长所属的反射部件所在的端口。这样，由于在识别端口时，由一个波长的测试光信号，转换为多个子波长的测试光信号进行识别，所以可以提升端口识别准确率。
在一种可能的实现方式中，根据至少一个分光器对应的第一波长和至少一个分光器的目标端口的反射部件的标定中心波长，确定至少一个分光器各端口的反射部件的中心波长的偏移量，包括：对于每个分光器，将分光器对应的第一波长与分光器的目标端口的反射部件的标定中心波长的差值，确定为分光器各端口的反射部件的中心波长的偏移量。
本申请所示的方案，对于任一分光器，端口识别的装置可以确定该分光器对应的第一波长与该分光器的目标端口的反射部件的标定中心波长的差值，将该差值确定为该分光器各端口的反射部件的中心波长的偏移量。由于同一个分光器下所有端口的反射部件距离比较近，那么该所有端口的反射部件温度变化一致，因此只用测试一个端口(即目标端口)的反射部件的中心波长的偏移量即可，即可获得该分光器下所有端口的反射部件当前的中心波长。
第二方面，提供了一种端口识别的系统，应用于ODN，所述系统包括可调的OTDR和OLT；
所述可调的OTDR用于输出多种波长的测试光信号；
所述可调的OTDR还用于检测接收到的测试光信号的接收功率和接收时间；
所述OLT与所述可调的OTDR建立有通信连接；
所述OLT用于执行第一方面所述的方法。
第三方面，提供了一种端口识别的装置，该装置包括多个模块，该多个模块通过执行指令来实现上述第一方面所提供的端口识别的方法。
第四方面，提供了一种端口识别设备，所述端口识别设备包括处理器和存储器，其中：
所述存储器中存储有计算机指令；
所述处理器执行所述计算机指令，以实现第一方面所述的方法。
第五方面，提供了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机指令，当所述计算机可读存储介质中的计算机指令被端口识别设备执行时，使得所述端口识别设备执行第一方面所述的方法。
第六方面，本申请提供了一种计算机程序产品，所述计算机程序产品包括计算机指令，当所述计算机指令被端口识别设备执行时，所述端口识别设备执行上述第一方面所述的端口识别的方法。
附图说明
图1是本申请一个示例性实施例提供的应用场景的示意图；
图2是本申请一个示例性实施例提供的可调的OTDR的结构示意图；
图3是本申请一个示例性实施例提供的可调的OTDR的结构示意图；
图4是本申请一个示例性实施例提供的可调的OTDR的结构示意图；
图5是本申请一个示例性实施例提供的端口识别设备的结构示意图；
图6是本申请一个示例性实施例提供的端口识别的方法的流程示意图；
图7是本申请一个示例性实施例提供的第一对应关系的示意图；
图8是本申请一个示例性实施例提供的ONT检测到的功率的示意图；
图9是本申请一个示例性实施例提供的端口识别的装置的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
本申请可以适用于PON系统，PON系统结构如图1所示，由三个部分组成：OLT、ODN、光接入网络用户终端(如ONT)，ODN一般分为四个部分，即分光器、主干光纤、分布光纤和分支光纤，主干光纤指OLT与ODN之间的光纤，分布光纤指各级分光器之间的光纤，分支光纤指分光器与光接入网络用户终端之间的光纤。图1中是具有二级分光的ODN的结构图，对只有一级分光的ODN只有主干光纤和分支光纤。
由于ODN是由无源器件组成，造成了ONT在ODN中连接的端口比较难识别。相关技术中，为分光器的不同端口设置不同的反射部件，具体是在ODN的每一级的每个分光器的不同端口设置中心波长不同的反射部件，且每一级的分光器的端口设置的反射部件的中心波长不相同。 ODN连接的ONT基于接收到的测试光信号的功率，确定自身连接的端口。由于ODN中的分光器有可能部署在室外，导致反射部件的中心波长发生偏移，这样，在可调的OTDR发出反射部件标定的中心波长的测试光信号，该反射部件未反射该中心波长的测试光信号，所以实际连接在该端口的ONT会接收到该中心波长的测试光信号，使确定出该ONT未连接在该端口，从而导致确定连接的端口错误。
基于上述原因，本申请实施例提供了一种端口识别的方法，该方法的执行主体可以是端口识别的装置，端口识别的装置可以是硬件设备，可以是软件装置。在端口识别的装置为硬件设备时，端口识别的装置可以称为是端口识别设备，端口识别的装置可以是OLT等，具体的可以是OLT中的单板执行端口识别的方法；在端口识别的装置是软件装置时，可以是部署在OLT的软件模块等。
另外，PON系统还包括一个发射测试光信号的装置，该装置既可以发射测试光信号，也可以检测被反射部件(该反射部件可以是反射光栅)反射回来的测试光信号的接收功率。具体的，发射测试光信号的装置可以是一个可调的OTDR，可调的OTDR是一个波长可调的OTDR。可调的OTDR是在原有的OTDR的基础上使得OTDR可以发出多种波长的测试光信号，该多种波长包括ODN中分光器的端口设置的反射部件的中心波长。可调的OTDR还可以检测接收到的测试光信号的接收功率和接收时间，此处能有接收功率是由于测试光信号在ODN中传输时，被ODN中的光纤反射或散射(该散射可以是背向散射)回可调的OTDR，或被ODN中的分光器的端口设置的反射部件反射回可调的OTDR。如图2所示，还提供了可调的OTDR的示意图，包括一个可调波长的激光器、合/分光器(如耦合器)或环形器、接收部件、处理器等。可调波长的激光器与处理器建立有连接，处理器与接收部件建立有连接，可调波长的激光器用于输出多种波长的测试光信号，合/分光器或环形器用于实现发送测试光信号和接收测试光信号，接收部件用于检测接收功率，处理器用于记录接收时间等。图2中仅示出了部分器件。
此处需要说明的是，在测试光信号用于检测反射部件的中心波长的偏移量时，测试光信号可以是脉冲光信号。可调波长的激光器产生直流光信号，经过光调制器产生光脉冲信号，那么输出给合/分光器的是脉冲光信号。具体的，如图3所示，处理器产生电脉冲信号，经过驱动器驱动光调制器产生光脉冲信号，或者处理器产生控制信号，控制驱动器产生电脉冲信号，电脉冲信号驱动光调制器产生光脉冲信号。
当然，可调波长的激光器也可以直接产生脉冲光信号，那么输出给合/分光器的是脉冲光信号。具体的，如图4所示，处理器产生电脉冲信号，经过驱动器放大后驱动光调制器产生光脉冲信号。或者，处理器产生控制信号，控制驱动器产生电脉冲信号，电脉冲信号驱动可调波长的激光器产生光脉冲信号。
在测试光信号为用于确定ONT与分光器的端口的连接关系的测试光信号时，该测试光信号可以是脉冲测试光信号，也可以是直流测试光信号，本申请实施例不做限定。若测试光信号是直流光信号，则对应图3，可调波长的激光器直接生成直流光信号，光调制器不对该直流光信号进行调制。若测试光信号为直流光信号，则对应图4，可调波长的激光器直接产生直流光信号。
此处需要说明的是，若同时存在业务光信号和测试光信号，还可以在可调的OTDR和ODN之间设置一个用于合并业务光信号的测试光信号的器件，如波分复用器等。此时OLT与ODN之间发送业务光信号时，也通过该器件。
如图5所示，端口识别的装置为端口识别设备时，该端口识别设备包括存储器501和处理器502。存储器501可以是只读存储器(Read-Only Memory，ROM)、静态存储设备、动态存储设备等。存储器501可以存储计算机指令，当存储器501中存储的计算机指令被处理器502执行时，处理器502用于执行端口识别的方法。存储器还可以存储数据。处理器502可以采用通用的中央处理器(Central Processing Unit，CPU)，应用ASIC，图形处理器(Graphics Processing Unit，GPU)或其任意组合。处理器502可以包括一个或多个芯片。
如图6所示，提供了端口识别的方法的执行流程，且端口识别的装置为OLT：
步骤601，端口识别的装置获取ODN中至少一个分光器分别对应的第一波长，对于每个分光器，第一波长为在ODN中传输时被该分光器的目标端口的反射部件反射后接收功率最大的测试光信号对应的波长。
其中，目标端口为分光器的任一端口。
在本实施例中，端口识别的装置在确定ONT在ODN中连接的端口时，在ODN中至少一个分光器为多个分光器的情况下，对于该至少一个分光器中的任一分光器，该分光器的不同端口设置有不同的反射部件，每个反射部件可以是任一种可以反射某种波长的测试光信号的部件，如反射光栅等。在ODN中至少一个分光器为一个分光器的情况下，该一个分光器的不同端口设置有不同的反射部件，每个反射部件可以是任一种可以反射某种波长的测试光信号的部件，如反射光栅等。
对于至少一个分光器中的每个分光器，端口识别的装置可以获取该分光器的目标端口的反射部件对测试光信号进行反射的反射率最大的测试光信号的波长，即获取到该分光器对应的第一波长。那么也即是获取到在ODN中传输时被该目标端口的反射部件反射后接收功率最大的测试光信号对应的波长。
这样，端口识别的装置可以获取到ODN中至少一个分光器分别对应的第一波长。
步骤602，对于每个分光器，端口识别的装置根据该分光器对应的第一波长和该分光器的目标端口的反射部件的标定中心波长，确定该分光器各端口的反射部件的中心波长的偏移量。
其中，标定中心波长指反射部件制作完成后，理想情况下最大反射的光信号的波长。
在本实施例中，对于ODN中至少一个分光器中的每个分光器，端口识别的装置可以获取该分光器的目标端口的反射部件的标定中心波长。然后端口识别的装置使用该分光器对应的第一波长和该分光器的目标端口的反射部件的标定中心波长，确定该分光器各端口的反射部件的中心波长的偏移量。对于至少一个分光器中的任一分光器，端口识别的装置均使用该方式即可确定出至少一个分光器各端口的反射部件的中心波长的偏移量。
步骤603，端口识别的装置根据至少一个分光器各端口的反射部件的中心波长的偏移量，确定至少一个分光器各端口的反射部件当前的中心波长。
在本实施例中，对于至少一个分光器中的每个分光器，端口识别的装置可以将该分光器各端口的反射部件的中心波长的偏移量与该分光器各端口的反射部件的标定中心波长相加，获得该分光器各端口的反射部件当前的中心波长。
需要说明的是，此处的“当前”指确定出偏移量的这个时间点。
步骤604，端口识别的装置根据ODN中的至少一个分光器各端口的反射部件当前的中心 波长，确定目标ONT在ODN中连接的端口。
其中，目标ONT可以ODN连接的任意ONT。
在本实施例中，步骤601至步骤603确定出至少一个分光器中各端口设置的反射部件当前的中心波长。
可调的OTDR可以按照预设顺序，依次发出至少一个分光器各端口设置的反射部件当前的中心波长的测试光信号。这些波长的测试光信号经过ODN的传输，目标ONT可以检测接收到的各种中心波长的测试光信号的接收功率。然后目标ONT将这些接收功率按照检测到的顺序发送至端口识别的装置。端口识别的装置可以确定各接收功率对应的中心波长，计算这些接收功率中的最大接收功率与其余接收功率的差值，确定差值大于第一数值的接收功率。将差值大于第一数值的接收功率对应的中心波长所属的反射部件所在的端口，确定为目标ONT在ODN中连接的端口。或者，端口识别的装置可以确定各接收功率中最小接收功率对应的中心波长，将该中心波长所属的反射部件所在的端口，确定为目标ONT在ODN中连接的端口。
此处是目标ONT将接收功率发送至端口识别的装置，当然，也可以是端口识别的装置将上述预设顺序、以及各种中心波长对应的端口(即中心波长所属的反射部件所在的端口)发送至目标ONT。由目标ONT按照上述方式确定目标ONT在ODN中连接的端口。目标ONT在确定出自身在ODN中连接的端口之后，可以将自身在ODN中连接的端口发送至端口识别的装置。
这样，由于能获取到反射部件当前的中心波长，所以可以使确定出的ONT在ODN中连接的端口比较准确。
在一种可能的实现方式中，在步骤601中，端口识别的装置可以按照以下方式，获取到第一波长，处理如下：
端口识别的装置获取ODN中至少一个分光器分别对应的多个第一对应关系，对于每个分光器，每个第一对应关系为多种波长的测试光信号分别在ODN中传输时的传输距离与背向散射和/或被反射后的接收功率的对应关系，多种波长包括第二波长，第二波长为该分光器的任一端口的反射部件的标定中心波长，多种波长中除第二波长之外的其他波长是根据第二波长和目标调整值确定的，对于每个分光器，在该分光器对应的多个第一对应关系中，确定该分光器的目标端口的反射部件位置处的接收功率最大的第一对应关系，将接收功率最大的第一对应关系对应的波长，确定为该分光器对应的第一波长。
其中，目标调整值可以预设，用于调整测试光信号的波长，目标调整值的取值决定测试光信号的波长的调整幅度。目标端口为分光器的任一端口。
在本实施例中，以至少一个分光器中的目标分光器为例进行描述：
可调的OTDR可以发出目标分光器的目标端口的反射部件的中心波长(即第二波长)的测试光信号，并且记录发出第二波长的测试光信号的发射时间。可调的OTDR记录接收到的第二波长的测试光信号的接收功率与接收时间的对应关系。可调的OTDR可以确定每个接收时间与发射时间的差值，然后使用传输距离(D)＝(c*t)/2n，确定出每个差值对应的传输距离。其中在该式子中c表示光速，t表示差值，n表示ODN中光纤的折射率。由于传输距离与接收时间相对应，接收时间又与接收功率相对应，这样，即获得第二波长的测试光信号在ODN中传输时的传输距离与接收功率的对应关系(即第二波长对应的第一对应关系)。例如，假设ODN中包括一个分光器，该分光器的目标端口的反射部件的中心波长的第二波长，第二波长对应的第一对应关系使用图7表示。
然后可调的OTDR可以将第二波长调整目标调整值，获得第三波长，然后可调的OTDR可以发出第三波长的测试光信号，记录第三波长对应的第一对应关系。可调的OTDR在第三波长的基础上调整目标调整值，获得第四波长，然后可调的OTDR可以发出第四波长的测试光信号，记录第四波长对应的第一对应关系。可调的OTDR可以一直调整发出测试光信号的波长，直至端口识别的装置找到目标分光器对应的第一波长。此处需要说明的是，调整目标调整值可以是加大波长，也可以缩减波长。
然后可调的OTDR可以将目标分光器对应的多个第一对应关系，发送至端口识别的装置，端口识别的装置可以在多个第一对应关系中，确定目标分光器的目标端口的反射部件位置处的接收功率最大的第一对应关系，将该接收功率最大的第一对应关系对应的波长，确定为目标分光器对应的第一波长。此处需要说明的是，目标分光器的目标端口的反射部件位置处实际上是距离为目标端口的反射部件与可调的OTDR之间的距离的位置处。
另外，端口识别的装置也可以使用目标调整值调整第二波长，指示可调的OTDR发出的测试光信号的波长，在端口识别的装置确定出目标分光器对应的第一波长后，端口识别的装置可以指示可调的OTDR发出用于确定其他分光器对应的第一波长的测试光信号。
可选的，“至少一个”包括一个或多个两种情况，在“至少一个”为多个的情况下，也即ODN中包括多个分光器为多个分光器的情况下，端口识别的装置可以使用上述方式确定至少一个分光器中其他分光器对应的第一波长。
此处需要说明的是，在本申请实施例中，若属于相同级的分光器中不同分光器的端口的反射部件的标定中心波长不相同，端口识别的装置可以基于上述第一对应关系确定出分光器对应的第一波长。若属于相同级的分光器中不同分光器的端口的反射部件的标定中心波长相同，且该不同分光器与可调的OTDR之间的距离不相同，则端口识别的装置也可以基于上述第一对应关系确定出分光器对应的第一波长。若属于相同级的分光器中不同分光器的端口的反射部件的标定中心波长相同，且该不同分光器与可调的OTDR之间的距离相同，则不能基于上述第一对应关系确定出分光器对应的第一波长，这是由于无法区分第一波长对应哪个分光器。此处属于相同级的分光器中不同分光器的端口的反射部件的标定中心波长不相同指：分光器1和分光器2属于第二级分光器，分光器1与分光器2均为1*2的分光器，分光器1的两个端口的反射部件的标定中心波长为波长1和波长2，分光器2的两个端口的反射部件的标定中心波长为波长3和波长4。此处属于相同级的分光器中不同分光器的端口的反射部件的标定中心波长相同指：分光器3和分光器4属于第二级分光器，分光器3与分光器4均为1*2的分光器，分光器3的两个端口的反射部件的标定中心波长为波长1和波长2，分光器4的两个端口的反射部件的标定中心波长为波长1和波长2。
在一种可能的实现方式中，在步骤602中，端口识别的装置可以使用如下方式确定出分光器各端口的反射部件的中心波长的偏移量：
对于每个分光器，端口识别的装置将分光器对应的第一波长与分光器的目标端口的反射部件的标定中心波长的差值，确定为分光器各端口的反射部件的中心波长的偏移量。
在本实施例中，对于任一分光器，端口识别的装置可以确定该分光器对应的第一波长与该分光器的目标端口的反射部件的标定中心波长的差值，将该差值确定为该分光器各端口的反射部件的中心波长的偏移量。由于同一个分光器下所有端口的反射部件距离比较近，那么该所有端口的反射部件温度变化一致，因此只用测试一个端口(即目标端口)的反射部件的 中心波长的偏移量即可，即可获得该分光器下所有端口的反射部件当前的中心波长。
在一种可能的实现方式中，在步骤604中，为了更准确识别ONT在ODN中连接的端口，可以按照如下方式，确定ONT在ODN中连接的端口：
端口识别的装置获取多组子波长的测试光信号在ODN中传输时，目标ONT分别检测到的第一功率，每组子波长是根据至少一个分光器的一个端口的反射部件当前的中心波长确定的，对于任一组子波长的各子波长与任一组子波长对应的端口的反射部件当前的中心波长的距离均小于目标数值；若目标组子波长对应的多个第一功率中存在小于目标阈值的第一功率，则确定目标ONT在ODN中连接的端口为目标组子波长对应的中心波长所属的端口。
其中，目标数值可以预先设置。目标阈值可以预先设置，在同时存在业务光信号和测试光信号时，可以设置为业务光信号到达ONT的功率，在仅存在测试光信号时，可以设置为一个预设数值，这个预设数值比较小。
在本实施例中，对于ODN中任一分光器各端口的反射部件，可调的OTDR可以根据各端口的反射部件当前的中心波长，确定该当前的中心波长对应的一组子波长。具体的，对于任一端口的反射部件当前的中心波长，可调的OTDR可以确定该当前的中心波长与目标数值的和，获得第二数值，并且确定该当前的中心波长与目标数值的差，获得第三数值。可调的OTDR在第二数值和第三数值之间等间隔取预设数目个波长(预设数目可以为10等)，该预设数目个波长可以包括第二数值和第三数值。然后可调的OTDR可以按照预设顺序，发出每个反射部件当前的中心波长对应的一组子波长的测试光信号。并且可调的OTDR可以将该预设顺序通知给端口识别的装置。
任一子波长的测试光信号在ODN中传输，ODN连接的ONT可以检测自身接收到的测试光信号的第一功率。这样，对于目标ONT可以检测到每组子波长中各子波长的测试光信号的第一功率。目标ONT将检测到的每个第一功率发送至端口识别的装置。这样，端口识别的装置可以获取到多组子波长在ODN中传输时，被目标ONT检测到的第一功率。例如，如图8所示，ODN连接有三个ONT(即ONT1、ONT2和ONT3)，对于ONT在ODN中连接的端口的反射部件的中心波长对应的一组子波长，三个ONT均可以检测多个第一功率。
对于目标ONT，端口识别装置可以判断各组子波长对应的多个第一功率中是否存在小于目标阈值的第一功率，若在目标组子波长对应的多个第一功率中存在小于目标阈值的第一功率，则端口识别的装置可以确定目标ONT在ODN中连接的端口为目标组子波长对应的中心波长所属的端口，即为目标组子波长的当前的中心波长所属的反射部件所在的端口。另外，若在任一组子波长对应的多个第一功率中均不存在小于目标阈值的第一功率，则可以确定目标ONT在ODN中连接的端口识别失败。此处目标ONT检测到的接收功率如果小于目标阈值，说明该接收功率对应的测试光信号被反射部件所反射，而不会达到目标ONT，所以可以确定出目标ONT连接在该反射部件所在的端口。
这样，由于在识别端口时，由一个波长的测试光信号，转换为多个子波长的测试光信号进行识别，所以可以提升端口识别准确率。
此处需要说明的是，上述是可调的OTDR确定反射部件当前的中心波长对应的一组子波长，当然此处也可以是端口识别的装置按照与可调的OTDR相同的方式，确定出多组子波长。然后端口识别的装置将多组子波长以及上述预设顺序，通知给可调的OTDR。
通过本申请实施例，可以校准ODN中至少一个分光器的端口设置的反射部件的中心波长， 使得识别ONT在ODN中连接的端口更准确。另外，由于本申请实施例中可以校准反射部件的中心波长，所以不需要采用中心波长间隔比较大的反射部件(这是为了防止中心波长间隔比较小，而导致在温度变化时不同反射部件反射其他反射部件的中心波长的测试光信号)，可以使各反射部件的中心波长的间隔更小，进而可以减少可调的OTDR的扫描波长范围，降低了可调的OTDR的制造难度与成本，产品化可行性高。
图9是本申请实施例提供的端口识别的装置的结构图。该装置可以通过软件、硬件或者两者的结合实现成为装置中的部分或者全部，该装置应用于ODN，本申请实施例提供的装置可以实现本申请实施例图6所述的流程，该装置包括：获取模块910和确定模块920，其中：
获取模块910，用于获取所述ODN中至少一个分光器分别对应的第一波长，对于每个分光器，所述第一波长为在所述ODN中传输时被所述分光器的目标端口的反射部件反射后接收功率最大的测试光信号对应的波长，具体可以用于实现步骤601的获取功能以及步骤601包含的隐含步骤；
确定模块920，用于根据所述至少一个分光器对应的第一波长和所述至少一个分光器的目标端口的反射部件的标定中心波长，确定所述至少一个分光器各端口的反射部件的中心波长的偏移量；根据所述至少一个分光器各端口的反射部件的中心波长的偏移量，确定所述至少一个分光器各端口的反射部件当前的中心波长；根据所述ODN中的至少一个分光器各端口的反射部件当前的中心波长，确定目标光网络终端ONT在所述ODN中连接的端口，具体可以用于实现步骤602至步骤604的确定功能以及步骤602至步骤604包含的隐含步骤。
在一种可能的实现方式中，所述获取模块910，用于：
获取所述ODN中至少一个分光器分别对应的多个第一对应关系，对于每个分光器，每个第一对应关系为多种波长的测试光信号分别在所述ODN中传输时的传输距离与被反射和/或散射后的接收功率的对应关系，所述多种波长包括第二波长，所述第二波长为所述分光器的任一端口的反射部件的中心波长，所述多种波长中除所述第二波长之外的其他波长是根据所述第二波长和调整值确定的；
对于所述至少一个分光器中每个分光器，在所述分光器对应的多个第一对应关系中，确定所述分光器的端口的反射部件位置处的接收功率最大的第一对应关系，将所述接收功率最大的第一对应关系对应的波长，确定为所述分光器对应的第一波长。
在一种可能的实现方式中，所述确定模块920，用于：
获取多组子波长的测试光信号在所述ODN中传输时，所述目标ONT分别检测到的第一功率，每组子波长是根据所述至少一个分光器的一个端口的反射部件当前的中心波长确定的，对于任一组子波长的各子波长与所述任一组子波长对应的端口的反射部件当前的中心波长的距离均小于目标数值；
若目标组子波长对应的多个第一功率中存在小于目标阈值的第一功率，则确定所述目标ONT在所述ODN中连接的端口为目标组子波长对应的中心波长所属的端口。
在一种可能的实现方式中，所述确定模块920，用于：
对于所述每个分光器，将所述分光器对应的第一波长与所述分光器的目标端口的反射部件的标定中心波长的差值，确定为所述分光器各端口的反射部件的中心波长的偏移量。
上述本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时也可以有另外的划分方式，另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成为一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现，当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令，在OLT上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输。所述计算机可读存储介质可以是OLT够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(如软盘、硬盘和磁带等)，也可以是光介质(如数字视盘(Digital Video Disk，DVD)等)，或者半导体介质(如固态硬盘等)。

Claims (11)

  1. 一种端口识别的方法，其特征在于，应用于光分配网络ODN，所述方法包括：
    获取所述ODN中至少一个分光器分别对应的第一波长，对于每个分光器，所述第一波长为在所述ODN中传输时被所述分光器的目标端口的反射部件反射后接收功率最大的测试光信号对应的波长；
    根据所述至少一个分光器对应的第一波长和所述至少一个分光器的目标端口的反射部件的标定中心波长，确定所述至少一个分光器各端口的反射部件的中心波长的偏移量；
    根据所述至少一个分光器各端口的反射部件的中心波长的偏移量，确定所述至少一个分光器各端口的反射部件当前的中心波长；
    根据所述ODN中的至少一个分光器各端口的反射部件当前的中心波长，确定目标光网络终端ONT在所述ODN中连接的端口。
  2. 根据权利要求1所述的方法，其特征在于，所述获取所述ODN中至少一个分光器分别对应的第一波长，包括：
    获取所述ODN中至少一个分光器分别对应的多个第一对应关系，对于每个分光器，每个第一对应关系为多种波长的测试光信号分别在所述ODN中传输时的传输距离与背向散射和/或被反射后的接收功率的对应关系，所述多种波长包括第二波长，所述第二波长为所述分光器的任一端口的反射部件的标定中心波长，所述多种波长中除所述第二波长之外的其他波长是根据所述第二波长和目标调整值确定的；
    对于所述每个分光器，在所述分光器对应的多个第一对应关系中，确定所述分光器的目标端口的反射部件位置处的接收功率最大的第一对应关系，将所述接收功率最大的第一对应关系对应的波长，确定为所述分光器对应的第一波长。
  3. 根据权利要求1或2所述的方法，其特征在于，所述根据所述ODN中的至少一个分光器各端口的反射部件当前的中心波长，确定目标ONT在所述ODN中连接的端口，包括：
    获取多组子波长的测试光信号在所述ODN中传输时，所述目标ONT分别检测到的第一功率，每组子波长是根据所述至少一个分光器的一个端口的反射部件当前的中心波长确定的，对于任一组子波长的各子波长与所述任一组子波长对应的端口的反射部件当前的中心波长的距离均小于目标数值；
    若目标组子波长对应的多个第一功率中存在小于目标阈值的第一功率，则确定所述目标ONT在所述ODN中连接的端口为所述目标组子波长对应的中心波长所属的端口。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述根据所述至少一个分光器对应的第一波长和所述至少一个分光器的目标端口的反射部件的标定中心波长，确定所述至少一个分光器各端口的反射部件的中心波长的偏移量，包括：
    对于每个分光器，将所述分光器对应的第一波长与所述分光器的目标端口的反射部件的 标定中心波长的差值，确定为所述分光器各端口的反射部件的中心波长的偏移量。
  5. 一种端口识别的装置，其特征在于，应用于光分配网络ODN，所述装置包括：
    获取模块，用于获取所述ODN中至少一个分光器分别对应的第一波长，对于每个分光器，所述第一波长为在所述ODN中传输时被所述分光器的目标端口的反射部件反射后接收功率最大的测试光信号对应的波长；
    确定模块，用于：
    根据所述至少一个分光器对应的第一波长和所述至少一个分光器的目标端口的反射部件的标定中心波长，确定所述至少一个分光器各端口的反射部件的中心波长的偏移量；
    根据所述至少一个分光器各端口的反射部件的中心波长的偏移量，确定所述至少一个分光器各端口的反射部件当前的中心波长；
    根据所述ODN中的至少一个分光器各端口的反射部件当前的中心波长，确定目标光网络终端ONT在所述ODN中连接的端口。
  6. 根据权利要求5所述的装置，其特征在于，所述获取模块，用于：
    获取所述ODN中至少一个分光器分别对应的多个第一对应关系，对于每个分光器，每个第一对应关系为多种波长的测试光信号分别在所述ODN中传输时的传输距离与背向散射和/或被反射后的接收功率的对应关系，所述多种波长包括第二波长，所述第二波长为所述分光器的任一端口的反射部件的标定中心波长，所述多种波长中除所述第二波长之外的其他波长是根据所述第二波长和目标调整值确定的；
    对于所述每个分光器，在所述分光器对应的多个第一对应关系中，确定所述分光器的目标端口的反射部件位置处的接收功率最大的第一对应关系，将所述接收功率最大的第一对应关系对应的波长，确定为所述分光器对应的第一波长。
  7. 根据权利要求5或6所述的装置，其特征在于，所述确定模块，用于：
    获取多组子波长的测试光信号在所述ODN中传输时，所述目标ONT分别检测到的第一功率，每组子波长是根据所述至少一个分光器的一个端口的反射部件当前的中心波长确定的，对于任一组子波长的各子波长与所述任一组子波长对应的端口的反射部件当前的中心波长的距离均小于目标数值；
    若目标组子波长对应的多个第一功率中存在小于目标阈值的第一功率，则确定所述目标ONT在所述ODN中连接的端口为所述目标组子波长对应的中心波长所属的端口。
  8. 根据权利要求5至7任一项所述的装置，其特征在于，所述确定模块，用于：
    对于每个分光器，将所述分光器对应的第一波长与所述分光器的目标端口的反射部件的标定中心波长的差值，确定为所述分光器各端口的反射部件的中心波长的偏移量。
  9. 一种端口识别的系统，其特征在于，应用于光分配网络ODN，所述系统包括可调的光时域反射仪OTDR和光线路终端OLT；
    所述可调的OTDR用于输出多种波长的测试光信号；
    所述可调的OTDR还用于检测接收到的测试光信号的接收功率和接收时间；
    所述OLT与所述可调的OTDR建立有通信连接；
    所述OLT用于执行权利要求1至4任一所述的方法。
  10. 一种端口识别设备，其特征在于，所述端口识别设备包括处理器和存储器，其中：
    所述存储器中存储有计算机指令；
    所述处理器执行所述计算机指令，以实现所述权利要求1-4任一项权利要求所述的方法。
  11. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机指令，当所述计算机可读存储介质中的计算机指令被端口识别设备执行时，使得所述端口识别设备执行所述权利要求1-4任一项权利要求所述的方法。
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