WO2020253540A1 - 无源光网络的波长切换、配置方法及装置 - Google Patents

无源光网络的波长切换、配置方法及装置 Download PDF

Info

Publication number
WO2020253540A1
WO2020253540A1 PCT/CN2020/094261 CN2020094261W WO2020253540A1 WO 2020253540 A1 WO2020253540 A1 WO 2020253540A1 CN 2020094261 W CN2020094261 W CN 2020094261W WO 2020253540 A1 WO2020253540 A1 WO 2020253540A1
Authority
WO
WIPO (PCT)
Prior art keywords
wavelength
onu
upstream
olt
ranging
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2020/094261
Other languages
English (en)
French (fr)
Inventor
张伟良
李明生
杨波
袁立权
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZTE Corp
Original Assignee
ZTE Corp
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 ZTE Corp filed Critical ZTE Corp
Priority to ES20826461T priority Critical patent/ES3005838T3/es
Priority to US17/620,216 priority patent/US12028153B2/en
Priority to EP20826461.4A priority patent/EP3985992B1/en
Publication of WO2020253540A1 publication Critical patent/WO2020253540A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
    • H04J14/025—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
    • 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
    • H04J14/0208—Interleaved arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0254—Optical medium access
    • H04J14/0256—Optical medium access at the optical channel layer
    • H04J14/0257—Wavelength assignment algorithms
    • 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
    • H04Q11/0062—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
    • H04Q11/0062—Network aspects
    • H04Q2011/0064—Arbitration, scheduling or medium access control 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
    • H04Q2011/0075—Wavelength grouping or hierarchical 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
    • H04Q2011/0086—Network resource allocation, dimensioning or optimisation

Definitions

  • the present disclosure relates to but is not limited to the field of communications.
  • Fig. 1 is a schematic diagram of a traditional network architecture of a passive optical network (PON) in the related art.
  • PON passive optical network
  • the channel between the optical line terminal (OLT) and the optical network unit (ONU) not only transmits data, but also transmits management information, that is, the OLT and ONU communicate through a channel.
  • OLT optical line terminal
  • ONU optical network unit
  • management information that is, the OLT and ONU communicate through a channel.
  • passive optical networks have gradually become one of the bearer technologies for mobile fronthaul, mobile backhaul, sensor networks, and in-vehicle networks. These network services affect mobile networks and even passive optical The transmission delay requirement of the network is very strict.
  • Transmission delays in passive optical networks include: optical transmission delays, delays caused by open quiet windows, and bandwidth allocation delays. Among them, the optical transmission delay is related to the optical fiber distance, and the transmission time of 20KM is about 100us.
  • the open quiet window is used for the OLT to discover and range the ONU, which is the overhead caused by the initialization of the channel connection between the OLT and the ONU. In order to find the ONU with a maximum distance of 20KM from the OLT, it is necessary to open a quiet window of 200 microseconds. During this period, the normally working ONU cannot communicate with the OLT. On the other hand, in order to quickly discover ONUs, the OLT needs to periodically open a quiet window to discover ONUs. This cycle is related to actual applications.
  • a quiet window of up to 200 microseconds must be opened every 1 second. Since this quiet window is used for ONUs that are to be registered and activated to send upstream signals, and other ONUs that have completed registration and activation and are working properly cannot send upstream signals in the quiet window, then If a normally working ONU has upstream data to be sent at the beginning of the quiet window, it must wait for the end of the quiet window to have a chance to send upstream data. In this case, the upstream data sent by a normally working ONU may cause a maximum of 200 Microsecond delay.
  • the OLT when the OLT performs ranging on the ONU, it also needs to open a quiet window, but in fact, when the OLT finds the ONU, it can estimate the distance between the OLT and the ONU, that is, the OLT can reach the ONU ranging response. Time can be estimated, and the quiet window used for ranging is specifically for the ONU to be ranging, and there is no need for multiple ONUs to compete. Therefore, the quiet window opened for ranging can be smaller than the quiet window opened for ONU discovery , The delay brought to the normal working ONU is also small.
  • a wavelength switching method for a passive optical network which includes: an optical network unit ONU responds to a ranging request message sent by an optical line terminal OLT on an upstream first wavelength supported by the ONU; The ONU receives the ranging information sent by the OLT; the ONU uses the received ranging information as the uplink second wavelength ranging information of the ONU, and allocates the ranging information in the uplink according to the bandwidth from the OLT.
  • Data transmission is performed on the uplink second wavelength; wherein the path transmission time difference caused by the wavelength interval between the uplink first wavelength and the uplink second wavelength is smaller than the corresponding error tolerance range when the OLT receives data; the measurement The distance information is obtained by the OLT through the ranging response sent by the ONU at the upstream first wavelength.
  • a wavelength configuration method for a passive optical network which includes: an optical line terminal OLT sends a ranging request message to an optical network unit ONU on a downstream wavelength, and sends a ranging request message on the upstream supported by the ONU.
  • the ranging response message is received on the first wavelength; the OLT completes the ranging of the downlink wavelength and the uplink first wavelength according to the ranging response message, and transmits the ranging information to the downlink wavelength ONU transmission; wherein, the ranging information is used to instruct the ONU to switch the transmission wavelength to the upstream second wavelength supported by the ONU; the OLT performs data transmission with the ONU at the upstream second wavelength; wherein , The path transmission time difference caused by the wavelength interval between the upstream first wavelength and the upstream second wavelength is smaller than the corresponding error tolerance range when the OLT receives data.
  • a wavelength switching device for a passive optical network located in an ONU of an optical network unit, and comprising: a response module configured to respond to an optical line terminal at the upstream first wavelength supported by the ONU A ranging request message sent by the OLT; a receiving module configured to receive the ranging information sent by the OLT; a switching module configured to use the received ranging information as the ranging information of the upstream second wavelength of the ONU, And perform data transmission on the upstream second wavelength according to the bandwidth allocation from the OLT; wherein the path transmission time difference caused by the wavelength interval between the upstream first wavelength and the upstream second wavelength is less than the The corresponding fault tolerance range when the OLT receives data; the ranging information is obtained by the OLT through the ranging response sent by the ONU at the upstream first wavelength.
  • a wavelength configuration device for a passive optical network located in an optical line terminal OLT including: an interactive module configured to send a ranging request message to an optical network unit ONU on a downstream wavelength, And receive a ranging response message on the uplink first wavelength supported by the ONU; a configuration module configured to complete the ranging of the downlink wavelength and the uplink first wavelength according to the ranging response message, and perform the ranging The information is sent to the ONU on the downstream wavelength; wherein the ranging information is used to instruct the ONU to switch the sending wavelength to the second upstream wavelength supported by the ONU; the data transmission module is configured to The upstream second wavelength performs data transmission with the ONU; wherein the path transmission time difference caused by the wavelength interval between the upstream first wavelength and the upstream second wavelength is smaller than the corresponding error tolerance range when the OLT receives data.
  • a storage medium in which a computer program is stored, wherein the computer program is configured to execute the steps in any one of the above method embodiments when running.
  • an electronic device including a memory and a processor, the memory stores a computer program, and the processor is configured to run the computer program to execute any one of the foregoing Steps in the method embodiment.
  • Figure 1 is a schematic diagram of a traditional network architecture of a passive optical network in related technologies
  • FIG. 2 is a flowchart of a method for wavelength switching of a passive optical network according to an embodiment of the present disclosure
  • Fig. 3 is a flowchart of a method for wavelength configuration of a passive optical network according to an embodiment of the present disclosure
  • FIG. 4 is a structural block diagram of a wavelength switching device for a passive optical network according to an embodiment of the present disclosure
  • Fig. 5 is a structural block diagram of a wavelength configuration device for a passive optical network according to an embodiment of the present disclosure
  • Fig. 6 is an optical path structure diagram of an ONU optical module according to an embodiment of the present disclosure.
  • Fig. 7 is a structural diagram of an optical path of an OLT optical module according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of dividing an uplink first wavelength and an uplink second wavelength according to an embodiment of the present disclosure
  • FIG. 9 is a diagram of the optical path structure of another ONU optical module according to an embodiment of the present disclosure.
  • Fig. 10 is a structural diagram of an optical path of another OLT optical module according to an embodiment of the present disclosure.
  • the present disclosure provides a wavelength switching method for a passive optical network.
  • Fig. 2 is a flowchart of a method for wavelength switching of a passive optical network according to an embodiment of the present disclosure. As shown in FIG. 2, in some embodiments, the method may include the following steps S202, S204, and S206.
  • step S202 the optical network unit ONU responds to the ranging request message sent by the optical line terminal OLT on the upstream first wavelength supported by the ONU.
  • step S204 the ONU receives the ranging information sent by the OLT.
  • step S206 the ONU uses the received ranging information as the uplink second wavelength ranging information of the ONU, and performs data transmission on the uplink second wavelength according to the bandwidth allocation from the OLT.
  • the path transmission time difference caused by the wavelength interval between the upstream first wavelength and the upstream second wavelength is less than the corresponding error tolerance range when the OLT receives data;
  • the ranging information is that the OLT passes through the It is derived from the ranging response sent by the ONU at the upstream first wavelength.
  • the difference between the upstream first wavelength and the upstream second wavelength will cause the transmission time of the upstream optical signal to be different, and the resulting transmission time difference (path transmission time difference) should be smaller than that received by the OLT.
  • the error tolerance range corresponding to the data is the error tolerance range corresponding to the data.
  • the ONU switching the transmission wavelength to the second uplink wavelength supported by the ONU according to the ranging information includes: the ONU tunes or switches the transmission wavelength from the first uplink wavelength To the upstream second wavelength.
  • the transmission wavelength is tuned from the upstream first wavelength to the upstream second wavelength to perform service interaction with the OLT.
  • the ONU can also switch the transmission wavelength from the upstream first wavelength to the upstream second wavelength, or directly turn on the upstream second wavelength.
  • the method further includes: when the ONU itself determines to save energy or receives the recovery ranging information sent by the OLT, the ONU will The transmission wavelength of is tuned or switched from the uplink second wavelength to the uplink first wavelength, wherein the recovery ranging information is used to instruct the ONU to configure the transmission wavelength as the uplink first wavelength.
  • the ranging information includes at least one of the following: equivalent delay, information such as the difference between the equivalent delay and the line transmission delay.
  • the uplink second wavelength is used to carry services whose delay is less than a preset delay threshold.
  • the fault tolerance range is related to the upstream transmission rate between the ONU and the OLT.
  • the time when optical signals of different rates do not conflict Basically the same, the non-conflict time of optical signals of different rates is converted into the corresponding bit data length.
  • the error tolerance range is the time of 32-bit data length.
  • the error tolerance range is 80 bits data length time, for 50G bit/s, the error tolerance range is 160 bits data length time.
  • the wavelength interval between the upstream first wavelength and the upstream second wavelength is less than 15 nm to achieve a transmission delay difference of 20 km that is less than the error tolerance range of the OLT to receive data.
  • the wavelength range of the upstream first wavelength and the upstream second wavelength can be planned and determined.
  • the upstream first wavelength and the upstream second wavelength can be within the wavelength range of 1290nm-1310nm, and 1290nm-1295nm is the wavelength range of the upstream first wavelength. 1305nm-1310nm is the wavelength range of the second upstream wavelength.
  • 1260nm-1280nm is divided into two sub-bands, 1260nm-1265nm and 1275nm-1280nm.
  • 1260nm-1265nm is the wavelength range of the first upstream wavelength
  • 1275nm-1280nm is the second upstream wavelength.
  • the first upstream wavelength is used for quiet window opening and ONU registration, which is a registered sub-wavelength
  • the second upstream wavelength is used to carry low-delay services and is a service sub-wavelength.
  • the uplink first wavelength and the uplink second wavelength can also have the same center wavelength, but use different polarizations, or use different subcarriers with the same center wavelength as the uplink first wavelength and the uplink second wavelength, and the subcarrier spacing can be 100Ghz.
  • the method according to the above embodiment can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is Better implementation.
  • the technical solution of the present disclosure essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to enable a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the method described in each embodiment of the present disclosure.
  • Fig. 3 is a flowchart of a wavelength configuration method of a passive optical network according to an embodiment of the present disclosure. As shown in FIG. 3, in some embodiments, the method may include the following steps S302, S304, and S306.
  • step S302 the optical line terminal OLT sends a ranging request message to the optical network unit ONU on the downstream wavelength, and receives a ranging response message on the upstream first wavelength supported by the ONU.
  • step S304 the OLT completes the ranging of the downlink wavelength and the uplink first wavelength according to the ranging response message, and sends the ranging information to the ONU on the downlink wavelength; wherein, The ranging information is used to instruct the ONU to switch the sending wavelength to the second uplink wavelength supported by the ONU.
  • step S306 the OLT performs data transmission with the ONU at the second upstream wavelength.
  • the path transmission time difference caused by the wavelength interval between the upstream first wavelength and the upstream second wavelength is smaller than the corresponding error tolerance range when the OLT receives data.
  • the difference between the upstream first wavelength and the upstream second wavelength will cause the transmission time of the upstream optical signal to be different, and the resulting transmission time difference (path transmission time difference) should be smaller than that received by the OLT.
  • the error tolerance range corresponding to the data is the error tolerance range corresponding to the data.
  • the ranging information includes at least one of the following: equivalent delay, information such as the difference between the equivalent delay and the line transmission delay.
  • the uplink second wavelength is used to carry services whose delay is less than a preset delay threshold.
  • the fault tolerance range is related to the upstream transmission rate between the ONU and the OLT.
  • the present disclosure also provides a passive optical network wavelength switching device, which is located in the optical network unit ONU.
  • the device is used to implement the above-mentioned embodiments and exemplary implementations. What has been described will not be repeated.
  • the term "module" can implement a combination of software and/or hardware with predetermined functions.
  • the devices described in the following embodiments can be implemented by software, implementation by hardware or a combination of software and hardware is also possible and conceived.
  • Fig. 4 is a structural block diagram of a wavelength switching device for a passive optical network according to an embodiment of the present disclosure.
  • the device may include: a response module 42 configured to respond to a ranging request message sent by an optical line terminal OLT on the upstream first wavelength supported by the ONU; a receiving module 44, Is configured to receive the ranging information sent by the OLT; the switching module 46 is configured to use the received ranging information as the uplink second wavelength ranging information of the ONU, and allocate it in accordance with the bandwidth from the OLT Data transmission is performed on the uplink second wavelength.
  • the path transmission time difference caused by the wavelength interval between the upstream first wavelength and the upstream second wavelength is less than the corresponding error tolerance range when the OLT receives data;
  • the ranging information is that the OLT passes through the It is derived from the ranging response sent by the ONU at the upstream first wavelength.
  • the difference between the upstream first wavelength and the upstream second wavelength will cause the transmission time of the upstream optical signal to be different, and the resulting transmission time difference (path transmission time difference) should be smaller than that received by the OLT.
  • the error tolerance range corresponding to the data is the error tolerance range corresponding to the data.
  • each of the above modules can be implemented by software or hardware.
  • it can be implemented in the following manner, but not limited to this: the above modules are all located in the same processor; or, the above modules are combined in any combination The forms are located in different processors.
  • the present disclosure also provides a wavelength configuration device for a passive optical network, which is located at the optical line terminal OLT.
  • the device is used to implement the above-mentioned embodiments and exemplary implementations. What has been described will not be repeated.
  • the term "module" can implement a combination of software and/or hardware with predetermined functions.
  • the devices described in the following embodiments can be implemented by software, implementation by hardware or a combination of software and hardware is also possible and conceived.
  • Fig. 5 is a structural block diagram of a wavelength configuration device for a passive optical network according to an embodiment of the present disclosure.
  • the device may include: an interaction module 52 configured to send a ranging request message to the optical network unit ONU on the downstream wavelength, and on the upstream first wavelength supported by the ONU Receiving a ranging response message; the configuration module 54 is configured to complete the ranging of the downlink wavelength and the uplink first wavelength according to the ranging response message, and send the ranging information to the ONU on the downlink wavelength Sending; wherein the ranging information is used to instruct the ONU to switch the sending wavelength to the second upstream wavelength supported by the ONU; the data transmission module 56 is configured to perform data with the OLT at the second upstream wavelength Transmission; wherein the path transmission time difference caused by the wavelength interval between the upstream first wavelength and the upstream second wavelength is smaller than the corresponding error tolerance range when the OLT receives data.
  • the difference between the upstream first wavelength and the upstream second wavelength will cause the transmission time of the upstream optical signal to be different, and the resulting transmission time difference (path transmission time difference) should be smaller than that received by the OLT.
  • the error tolerance range corresponding to the data is the error tolerance range corresponding to the data.
  • each of the above modules can be implemented by software or hardware.
  • it can be implemented in the following manner, but not limited to this: the above modules are all located in the same processor; or, the above modules are combined in any combination The forms are located in different processors.
  • Fig. 6 is an optical path structure diagram of an ONU optical module according to an embodiment of the present disclosure.
  • the optical module includes an optical transmitting component 1 (TOSA1) for normal business data communication, an optical transmitting component 2 (TOSA2) for ONU registration, and an optical receiving component (ROSA) for normal reception. ).
  • the TOSA1 emission wavelength range is the above-mentioned upstream first wavelength range (1260nm-1265nm), which can be realized based on electro-absorption modulated laser (EML), direct modulated laser (DML), tunable laser and other devices.
  • EML electro-absorption modulated laser
  • DML direct modulated laser
  • TOSA1 also includes a temperature control device or a wavelength locking device.
  • the TOSA2 emission wavelength range is the second uplink wavelength range (1275nm-1280nm), which can be implemented based on EML lasers, DML lasers, tunable lasers and other devices, to ensure that TOSA2 emits light wavelengths in the business sub-wavelength within the entire operating temperature range Within the band, TOSA2 also contains temperature control devices or wavelength locking devices.
  • the ONU optical module further includes a filter 1 and a filter 2 for TOSA1, TOSA2 and ROSA combining and demultiplexing to realize the single fiber output of the optical path of the optical module.
  • the filter 1 realizes the low-loss multiplexing and demultiplexing of TOSA1 and TOSA2, specifically including transmission to the second upstream wavelength and reflection to the first upstream wavelength. In order to reduce its multiplexing and demultiplexing loss, its transmission spectrum and reflection spectrum are in the service sub-wavelength The band and the registered sub-wavelength band must meet the conditions of minimal crosstalk.
  • the filter 2 realizes the low-loss multiplexing and demultiplexing of the upstream second wavelength of the transmitting end after the combination, and the upstream first wavelength and the ROSA receiving working wavelength optical signal. Further, on the premise that the optical power emitted by the ONU transmitter meets the system requirements, the filter 1 can also be replaced by a half mirror.
  • the ONU optical module further includes a control module, which turns on, turns off, or switches TOSA1 and TOSA2 at different stages of the ONU registration process according to a control instruction sent by the ONU device.
  • the ONU optical module also includes a controller, a driver, a TIA (transimpedance amplifier), etc., as well as a general electrical processing chip and a communication interface to realize the normal operation of the optical module and the information exchange between the optical module and the device.
  • Fig. 7 is an optical path structure diagram of an OLT optical module according to an embodiment of the present disclosure.
  • the optical module includes an optical transmitting component TOSA for normal business and control data communication, an optical receiving component 1 (ROSA1) for the second upstream wavelength, and a first wavelength upstream for receiving the ONU.
  • Light receiving assembly 2 (ROSA2).
  • ROSA1 and ROSA2 can be realized by photoelectric detection devices such as APD (Avalanche Diode) and PIN (positive-intrinsic-negative).
  • APD Anavalanche Diode
  • PIN positive-intrinsic-negative
  • the ROSA1 used for normal service communication receives the service sub-wavelength band wavelength emitted by the ONU through the transmission end of the filter 1, and the ROSA2 used for ONU registration receives the registered sub-wavelength band wavelength emitted by the ONU through the reflection end of the filter 1.
  • OLT optical module filter 1 meets the following conditions: filter 1 has low-loss transmission to the upstream second wavelength and low-loss reflection to the upstream first wavelength. Its transmission and reflection spectra must meet crosstalk in the service sub-wavelength band and the registered sub-wavelength band Minimal conditions.
  • the OLT optical module further includes a filter 2 for TOSA, ROSA1 and ROSA2 combining and demultiplexing to realize the single fiber output of the optical path of the optical module.
  • the filter 2 realizes the low-loss multiplexing and demultiplexing of the upstream second wavelength received by the OLT, the upstream first wavelength, and the working wavelength optical signal emitted by itself.
  • the OLT optical module further includes a control module, which opens or closes the ROSA2 at different stages of the registration process according to the control instruction sent by the OLT device.
  • the OLT optical module also includes a controller, a driver, TIA and other modules, as well as a general electrical processing chip and a communication interface, so as to realize the normal operation of the optical module and the information exchange between the optical module and the device.
  • sub-band division is only an embodiment of the present disclosure, and the sub-band division range can be adjusted according to the transmitter cost, the size of the filter isolation band, and the available wavelength resources.
  • the uplink band is re-divided into sub-bands, the ONU transmitting end requires two wavelength transmitters, or the tuning of the adjustable transmitter is added, which increases the cost of the ONU side optical module to a certain extent.
  • the upstream first wavelength and the upstream second wavelength of this solution are divided according to the polarization state.
  • the wavelength ranges are the same and correspond to the registered sub-wavelength and service sub-wavelength respectively.
  • the ONU transmitter TE polarized light sends normal service communication information as the upstream second wavelength
  • TM Polarized light transmission registration information is the first upstream wavelength.
  • the TE polarized light signal is the received normal communication signal
  • the TM polarized light signal is the received registration signal.
  • OLT reception can use direct detection polarization demultiplexing reception or coherent detection demultiplexing reception, depending on the system bandwidth and optical power budget requirements, polarization demultiplexing reception can be achieved through polarization diversity PD detection and digital signal processing algorithms , The details are not repeated here.
  • an optical path implementation of the optical emission component of the ONU side optical module includes a TE polarization state laser, a controllable polarization rotator, and a coupling optical path.
  • the TE polarization state laser may be a DML, EML, DBR laser, etc., which can load normal service data and output TE polarized light to the adjustable polarization rotator.
  • the controllable polarization rotator controls the polarization state of the output light to TE or TM according to different stages of the ONU registration process. This is a preferred embodiment for realizing polarization state wavelength division.
  • the ONU can also realize dual-polarized light output through 45-degree linear polarization and polarization splitting and combining, one polarization is loaded with normal service data, and the other is loaded with registered interactive information.
  • the upstream wavelength planning of the TWDM-PON system defined in G.989.2 has a wideband option of 1524 to 5444 nm, a reduced band option of 1528-1540 nm, and a narrow band option of 1532 to 1540 nm.
  • the above 3 options have greater wavelength redundancy, and the redundant band can be used as the first upstream wavelength (registered sub-wavelength) instead of occupying the 4 wavelength resources that work normally .
  • narrowband option 152-1540nm
  • FIG. 8 is a schematic diagram of dividing the upstream first wavelength and the upstream second wavelength according to an embodiment of the present disclosure.
  • the upstream second wavelength band works at 1531-1534nm
  • the upstream first wavelength band works at 1539-1542nm.
  • Each sub-band contains 4 wavelengths at intervals of about 100 GHz
  • the 4 wavelength grid points of the upstream second wavelength band are 1531.899nm, 1532.678nm, 1533.460nm, 1534.257nm.
  • the 4 wavelength grid points of the first upstream wavelength band are 1539.755 nm, 1540.568 nm, 1541.137 nm, and 1542.137 nm, respectively corresponding to the 4 wavelengths of the second upstream wavelength band.
  • CH1 in the service sub-wavelength band and CH1 in the registered sub-wavelength band are output from the same port of the AWG,..., and so on, in turn, the CH4 and registered sub-wavelength in the service sub-wavelength band
  • the CH4 in the band is output from the same port of the AWG.
  • the periodic AWG is used on the OLT side to combine and demultiplex the 4 signals of the TWDM-PON system to a single backbone fiber.
  • the downlink wavelength can also be based on the periodicity of the device to implement service sub-wavelengths, and the registered sub-wavelength and downlink wavelength are multiplexed and demultiplexed from the same port of the AWG.
  • the multiplexer/demultiplexer can also be implemented by TFF (thin film filter).
  • TFF thin film filter
  • Fig. 9 is a structural diagram of an optical path of another ONU optical module according to an embodiment of the present disclosure.
  • the optical module includes a light transmitting assembly (TOSA) for ONU normal communication and ONU registration, and a light receiving assembly (ROSA) for normal reception.
  • the TOSA emission wavelength can be tuned and switched between the service sub-wavelength band and the registered sub-wavelength band. It can be implemented based on EML lasers, DML lasers, tunable lasers and other devices, with about 8nm (business sub-wavelength band range + isolator Band range) tuning or switching capabilities, TOSA also includes temperature control devices and wavelength tuning or switching devices.
  • the ONU optical module also includes a filter 1 for TOSA and ROSA combining and demultiplexing to realize single fiber output of the optical path of the optical module. If the service sub-wavelength of the transmitting end of the module, the registered sub-wavelength is still in the TWDM-PON wavelength plan defined in G.989.2, and the original multiplexer and demultiplexer components can be reused for filter 1, without redesign.
  • the ONU optical module also includes a control module, which tunes or switches the TOSA emission light wavelength at different stages of the ONU registration process according to the control instruction sent by the ONU device.
  • the ONU optical module also includes a controller, a driver, TIA and other modules, as well as a general electrical processing chip and a communication interface to realize the normal operation of the optical module and the information exchange between the optical module and the device.
  • the OLT optical device uses periodic AWG devices to connect to the OLT optical modules CH1-CH4 and the backbone fiber, and multiplexes the downstream wavelengths CH1-CH4 emitted by the OLT optical modules CH1-CH4 to the backbone fiber.
  • the upstream registered sub-wavelengths CH1-CH4 or upstream service sub-wavelengths CH1-CH4 input by the backbone fiber are respectively demultiplexed and received by the corresponding OLT optical module.
  • the OLT optical module includes an optical transmitting component TOSA for normal communication, an optical receiving component 1 (ROSA1) for normal communication, and an optical receiving component 2 (ROSA2) for receiving ONU registered wavelengths.
  • ROSA1 and ROSA2 can be implemented using devices such as APD and PIN.
  • ROSA1 only receives service sub-wavelengths
  • ROSA2 only receives registered sub-wavelengths.
  • Fig. 10 is a structural diagram of an optical path of another OLT optical module according to an embodiment of the present disclosure.
  • the ROSA1 used for normal communication receives the service sub-wavelength band wavelengths emitted by the ONU through the transmission end of the filter 1
  • the ROSA2 used for ONU registration receives the registered sub-wavelength band wavelengths emitted by the ONU through the reflection end of the filter 1.
  • OLT optical module filter 1 meets the following conditions: Filter 1 has low-loss transmission for service sub-wavelengths and low-loss reflection for registered sub-wavelengths, and its transmission and reflection spectra must meet minimum crosstalk in service sub-wavelength bands and registered sub-wavelength bands conditions of.
  • the OLT optical module also includes a filter 2 for TOSA, ROSA1 and ROSA2 combining and demultiplexing to realize the single fiber output of the optical path of the optical module.
  • the filter 2 realizes the low-loss multiplexing and demultiplexing of the service sub-wavelength received by the OLT and the registered sub-wavelength and the optical signal of the working wavelength emitted by itself. If the service sub-wavelength received by the OLT optical module, the registered sub-wavelength is still in the TWDM PON wavelength plan defined in G.989.2, the filter 2 can reuse the TWDM PON multiplexer and demultiplexer components, without redesign.
  • the OLT optical module also includes a control module, which turns ROSA2 on or off at different stages of the registration process according to the control instructions sent by the OLT device.
  • the OLT optical module also includes a controller, a driver, TIA and other modules, as well as a general electrical processing chip and a communication interface, so as to realize the normal operation of the optical module and the information exchange between the optical module and the device.
  • sub-band division is only an embodiment of the present disclosure, and the sub-band division range can be adjusted according to the transmitter cost, the size of the filter isolation band, and the available wavelength resources.
  • the embodiments of the present disclosure also provide a storage medium in which a computer program is stored, wherein the computer program is configured to execute the steps in any of the foregoing method embodiments when running.
  • the above-mentioned storage medium may be configured to store a computer program for performing the following steps: Step S1, the optical network unit ONU responds to the ranging request sent by the optical line terminal OLT at the upstream first wavelength of the ONU Message; step S2, the ONU receives the ranging information sent by the OLT; step S3, the ONU uses the received ranging information as the ONU's uplink second wavelength ranging information, and according to the ranging information from the OLT The bandwidth is allocated for data transmission on the upstream second wavelength; wherein the path transmission time difference caused by the wavelength interval between the upstream first wavelength and the upstream second wavelength is smaller than the corresponding time when the OLT receives data Fault tolerance range; the ranging information is obtained by the OLT through the ranging response sent by the ONU at the upstream first wavelength.
  • step S1 the optical line terminal OLT sends a ranging request message on the downstream wavelength to the optical network unit ONU, and receives a ranging response message on the upstream first wavelength supported by the ONU;
  • step S2 the OLT according to the The ranging response message completes ranging of the downlink wavelength and the uplink first wavelength, and sends ranging information to the ONU on the downlink wavelength; wherein, the ranging information is used to indicate the The ONU switches the sending wavelength to the second upstream wavelength supported by the ONU;
  • step S3 the OLT performs data transmission with the ONU at the second upstream wavelength; wherein the first upstream wavelength and the second upstream wavelength
  • the path transmission time difference caused by the wavelength interval between the two wavelengths is smaller than the corresponding error tolerance range when the OLT receives data.
  • the foregoing storage medium may include, but is not limited to: U disk, Read-Only Memory (Read-Only Memory, ROM for short), Random Access Memory (RAM for short), mobile hard disk, magnetic disk Various media that can store computer programs such as discs or optical discs.
  • An embodiment of the present disclosure also provides an electronic device, including a memory and a processor, the memory stores a computer program, and the processor is configured to run the computer program to execute the steps in any one of the foregoing method embodiments.
  • the above electronic device may further include a transmission device and an input/output device, wherein the transmission device is connected to the above processor, and the input/output device is connected to the above processor.
  • the above-mentioned processor may be configured to execute the following steps through a computer program: step S1, the optical network unit ONU responds to the ranging request message sent by the optical line terminal OLT on the upstream first wavelength of the ONU; step S2, the ONU receives the ranging information sent by the OLT; step S3, the ONU uses the received ranging information as the uplink second wavelength ranging information of the ONU, and allocates it according to the bandwidth from the OLT Data transmission is performed on the upstream second wavelength; wherein the path transmission time difference caused by the wavelength interval between the upstream first wavelength and the upstream second wavelength is smaller than the corresponding error tolerance range when the OLT receives data; The ranging information is obtained by the OLT through the ranging response sent by the ONU at the upstream first wavelength.
  • step S1 the optical line terminal OLT sends a ranging request message on the downstream wavelength to the optical network unit ONU, and receives a ranging response message on the upstream first wavelength supported by the ONU;
  • step S2 the OLT according to the The ranging response message completes ranging of the downlink wavelength and the uplink first wavelength, and sends ranging information to the ONU on the downlink wavelength; wherein, the ranging information is used to indicate the The ONU switches the sending wavelength to the second upstream wavelength supported by the ONU;
  • step S3 the OLT performs data transmission with the ONU at the second upstream wavelength; wherein the first upstream wavelength and the second upstream wavelength
  • the path transmission time difference caused by the wavelength interval between the two wavelengths is smaller than the corresponding error tolerance range when the OLT receives data.
  • modules or steps of the present disclosure can be implemented by a general computing device, and they can be concentrated on a single computing device or distributed in a network composed of multiple computing devices.
  • they can be implemented with program codes executable by the computing device, so that they can be stored in the storage device for execution by the computing device, and in some cases, can be executed in a different order than here.

Landscapes

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

Abstract

本申请提供了一种无源光网络的波长切换、配置方法及装置。所述切换方法，包括：光网络单元ONU在所述ONU支持的上行第一波长上响应光线路终端OLT发送的测距请求消息；所述ONU接收所述OLT发送的测距信息；所述ONU将接收的所述测距信息作为所述ONU的上行第二波长的测距信息，并根据来自所述OLT的带宽分配在所述上行第二波长上进行数据传输；其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围；所述测距信息是所述OLT通过所述ONU在所述上行第一波长发送的测距响应得出的。

Description

无源光网络的波长切换、配置方法及装置 技术领域
本公开涉及但不限于通信领域。
背景技术
图1是相关技术中无源光网络(PON)传统网络架构的示意图。如图1所示。光线路终端(OLT)和光网络单元(ONU)之间的通道既传输数据，也传输管理信息，即：OLT和ONU之间通过一个通道进行通信。随着移动网络的发展，无源光网络逐渐成为移动前传、移动回传、传感网络、车载网络的承载技术之一，这些网络业务在应用过程中对移动网络、甚至作为承载的无源光网络的传输延迟要求很严格。
无源光网络中的传输延迟包括：光传输延迟，开放安静窗口造成的延迟，带宽分配延迟等。其中，光传输延迟与光纤距离相关，20KM的传输时间约100us。开放安静窗口用于OLT发现、测距ONU，属于OLT和ONU之间通道连接初始化带来的开销。为了发现位于距OLT相差最大20KM的ONU，有必要打开200微秒的安静窗口，这期间正常工作的ONU不能与OLT进行通常的通信。另一方面，为了实现快速发现ONU，OLT需周期性地开放安静窗口，以发现ONU，该周期与实际应用相关，如果希望ONU能够在秒级别注册ONU，则该周期应该是秒级别，即在每1秒中必须开放最大200微秒的安静窗口，由于该安静窗口用于待注册激活的ONU发送上行信号，而其他已经完成注册激活的、正常工作的ONU不能在安静窗口发送上行信号，那么如果正常工作的ONU正好在安静窗口开始时有上行数据要发送，则必须要等待安静窗口结束之后才有机会发送上行数据，这种情况下，正常工作的ONU发送的上行数据将可能造成最大200微秒的延迟。相关技术中，当OLT对ONU进行测距时，也需要开放安静窗口，但实际上OLT在发现ONU时，可以对OLT和ONU之间的距离进行预估，即OLT对ONU测距响应的到达时间可以进行预估，而且用于测 距的安静窗口是专门给待测距ONU用的，不需要多个ONU进行竞争，因此为测距开放的安静窗口可以比为ONU发现开放的安静窗口小，给正常工作的ONU带来的延迟也较小。
目前标准组织中也在讨论采用第三波长方式来实现安静窗口开放，但是存在以下几个问题：如果在原有系统中增加一个波长作为第三波长，那么该第三波长的定义存在较大困难，本身波长资源已经非常紧张；使用原有系统中的一个波长，如TWDM-PON(时分波分复用无源光网络)系统，但是这样原有系统的低延迟容量会下降。因此，针对相关技术中，能够承载移动前传、移动回传、传感网络、车载网络等对延迟要求很高的业务PON系统传输延迟难以降低的问题，还没有一种比较好的解决方案。
发明内容
根据本公开的一个实施例，提供了一种无源光网络的波长切换方法，包括：光网络单元ONU在所述ONU支持的上行第一波长上响应光线路终端OLT发送的测距请求消息；所述ONU接收所述OLT发送的测距信息；所述ONU将接收的所述测距信息作为所述ONU的上行第二波长的测距信息，并根据来自所述OLT的带宽分配在所述上行第二波长上进行数据传输；其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围；所述测距信息是所述OLT通过所述ONU在所述上行第一波长发送的测距响应得出的。
根据本公开的一个实施例，提供了一种无源光网络的波长配置方法，包括：光线路终端OLT在下行波长上向光网络单元ONU发送测距请求消息，并在所述ONU支持的上行第一波长上接收测距响应消息；所述OLT根据所述测距响应消息完成所述下行波长以及所述上行第一波长的测距，并将测距信息在所述下行波长上向所述ONU发送；其中，所述测距信息用于指示所述ONU将发送波长切换为所述ONU支持的上行第二波长；所述OLT在所述上行第二波长与所述ONU进行数据传输；其中，所述上 行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围。
根据本公开的另一个实施例，提供了一种无源光网络的波长切换装置，位于光网络单元ONU，包括：响应模块，配置为在所述ONU支持的上行第一波长上响应光线路终端OLT发送的测距请求消息；接收模块，配置为接收所述OLT发送的测距信息；切换模块，配置为将接收的所述测距信息作为所述ONU的上行第二波长的测距信息，并根据来自所述OLT的带宽分配在所述上行第二波长上进行数据传输；其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围；所述测距信息是所述OLT通过所述ONU在所述上行第一波长发送的测距响应得出的。
根据本公开的另一个实施例，提供了一种无源光网络的波长配置装置位于光线路终端OLT中，包括：交互模块，配置为在下行波长上向光网络单元ONU发送测距请求消息，并在所述ONU支持的上行第一波长上接收测距响应消息；配置模块，配置为根据所述测距响应消息完成所述下行波长以及所述上行第一波长的测距，并将测距信息在所述下行波长上向所述ONU发送；其中，所述测距信息用于指示所述ONU将发送波长切换为所述ONU支持的上行第二波长；数据传输模块，配置为在所述上行第二波长与所述ONU进行数据传输；其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围。
根据本公开的又一个实施例，还提供了一种存储介质，所述存储介质中存储有计算机程序，其中，所述计算机程序被设置为运行时执行上述任一项方法实施例中的步骤。
根据本公开的又一个实施例，还提供了一种电子装置，包括存储器和处理器，所述存储器中存储有计算机程序，所述处理器被设置为运行所述计算机程序以执行上述任一项方法实施例中的步骤。
附图说明
此处所说明的附图用来提供对本公开的进一步理解，构成本申请的一部分，本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的不当限定。在附图中：
图1是相关技术中无源光网络传统网络架构的示意图；
图2是根据本公开实施例的一种无源光网络的波长切换方法的流程图；
图3是根据本公开实施例的一种无源光网络的波长配置方法的流程图；
图4是根据本公开实施例的一种无源光网络的波长切换装置的结构框图；
图5是根据本公开实施例的一种无源光网络的波长配置装置的结构框图；
图6是根据本公开实施例的一种ONU光模块的光路结构图；
图7是根据本公开实施例的一种OLT光模块的光路结构图；
图8是根据本公开实施例的一种上行第一波长和上行第二波长的划分示意图；
图9是根据本公开实施例的另一种ONU光模块的光路结构图；
图10是根据本公开实施例的另一种OLT光模块的光路结构图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本公开。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本公开的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
一方面，本公开提供了一种无源光网络的波长切换方法。图2是根据 本公开实施例的一种无源光网络的波长切换方法的流程图。如图2所示，在一些实施例中，该方法可以包括如下步骤S202、S204和S206。
在步骤S202，光网络单元ONU在所述ONU支持的上行第一波长上响应光线路终端OLT发送的测距请求消息。
在步骤S204，所述ONU接收所述OLT发送的测距信息。
在步骤S206，所述ONU将接收的所述测距信息作为所述ONU的上行第二波长的测距信息，并根据来自所述OLT的带宽分配在所述上行第二波长上进行数据传输。
其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围；所述测距信息是所述OLT通过所述ONU在所述上行第一波长发送的测距响应得出的。
这里，可以理解的是，所述上行第一波长与所述上行第二波长的不同会导致上行光信号的传输时间不同，由此所导致的传输时间差(路径传输时间差)应小于所述OLT接收数据时对应的容错范围。
在一个实施例中，所述ONU根据所述测距信息将发送波长切换为所述ONU支持的上行第二波长，包括：所述ONU将所述发送波长由所述上行第一波长调谐或切换至所述上行第二波长。
例如，在测距后，ONU的光模块支持可调功能时，发送波长从上行第一波长调谐到上行第二波长，与OLT进行业务交互。同时，ONU还可以将发送波长从上行第一波长切换到上行第二波长，或者直接打开上行第二波长。
在一个实施例中，ONU在接收所述OLT的带宽分配之后，所述方法还包括：当所述ONU自身确定进行节能或接收到所述OLT发送的恢复测距信息时，所述ONU将当前的发送波长由所述上行第二波长调谐或切换至所述上行第一波长，其中，所述恢复测距信息用于指示所述ONU将所述发送波长配置为所述上行第一波长。
在一个实施例中，所述测距信息至少包括以下其中之一：等效时延，等效时延与线路传输时延的差等信息。
在一个实施例中，所述上行第二波长用于承载延迟小于预设延迟阈值的业务。
在一个实施例中，所述容错范围与所述ONU与所述OLT之间的上行传输速率有关，不同速率下为了保证各个ONU的上行数据不冲突，考虑到不同速率的光信号不冲突的时间基本相同，则不同速率的光信号的不冲突的时间换算成对应的比特数据长度就不同，例如，对于10G bit/s速率下，容错的范围为32比特数据长度的时间，对于25G bit/s，容错的范围为80比特数据长度的时间，对于50G bit/s，容错的范围为160比特数据长度的时间。
在速率为25Gbit/s的情况下，上行第一波长、上行第二波长之间的波长间隔小于15nm可以实现20km的传输时延差小于OLT能够接收数据的容错的范围。据此可以规划确定上行第一波长、上行第二波长的波长范围，比如上行第一波长、上行第二波长可以在1290nm-1310nm的波长范围内，1290nm-1295nm为上行第一波长的波长范围，1305nm-1310nm为上行第二波长的波长范围，再比如1260nm-1280nm被划分为1260nm-1265nm以及1275nm-1280nm两个子波段，1260nm-1265nm为上行第一波长的波长范围，1275nm-1280nm为上行第二波长的波长范围，上行第一波长用于安静窗口开放和ONU注册，为注册子波长，上行第二波长用于承载低延迟业务，为业务子波长。
上行第一波长、上行第二波长的也可以中心波长一样，但是使用不同的偏振，或者使用相同中心波长的不同子载波作为上行第一波长、上行第二波长，子载波间隔可以为100Ghz。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理 解，本公开的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本公开各个实施例所述的方法。
另一方面，本公开提供了一种无源光网络的波长配置方法。图3是根据本公开实施例的一种无源光网络的波长配置方法的流程图。如图3所示，在一些实施例中，该方法可以包括如下步骤S302、S304和S306。
在步骤S302，光线路终端OLT在下行波长上向光网络单元ONU发送测距请求消息，并在所述ONU支持的上行第一波长上接收测距响应消息。
在步骤S304，所述OLT根据所述测距响应消息完成所述下行波长以及所述上行第一波长的测距，并将测距信息在所述下行波长上向所述ONU发送；其中，所述测距信息用于指示所述ONU将发送波长切换为所述ONU支持的上行第二波长。
在步骤S306，所述OLT在所述上行第二波长与所述ONU进行数据传输。
其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围。
这里，可以理解的是，所述上行第一波长与所述上行第二波长的不同会导致上行光信号的传输时间不同，由此所导致的传输时间差(路径传输时间差)应小于所述OLT接收数据时对应的容错范围。
在一个实施例中，所述测距信息至少包括以下其中之一：等效时延，等效时延与线路传输时延的差等信息。
在一个实施例中，所述上行第二波长用于承载延迟小于预设延迟阈值的业务。
在一个实施例中，所述容错范围与所述ONU与所述OLT之间的上行 传输速率相关。
另一方面，本公开还提供了一种无源光网络的波长切换装置，位于光网络单元ONU，该装置用于实现上述实施例及示例性实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置可以以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图4是根据本公开实施例的一种无源光网络的波长切换装置的结构框图。如图4所示，在一些实施例中，该装置可以包括：响应模块42，配置为在所述ONU支持的上行第一波长上响应光线路终端OLT发送的测距请求消息；接收模块44，配置为接收所述OLT发送的测距信息；切换模块46，配置为将接收的所述测距信息作为所述ONU的上行第二波长的测距信息，并根据来自所述OLT的带宽分配在所述上行第二波长上进行数据传输。
其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围；所述测距信息是所述OLT通过所述ONU在所述上行第一波长发送的测距响应得出的。
这里，可以理解的是，所述上行第一波长与所述上行第二波长的不同会导致上行光信号的传输时间不同，由此所导致的传输时间差(路径传输时间差)应小于所述OLT接收数据时对应的容错范围。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。
另一方面，本公开还提供了一种无源光网络的波长配置装置，位于光线路终端OLT，该装置用于实现上述实施例及示例性实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置可以以软件来实现， 但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图5是根据本公开实施例的一种无源光网络的波长配置装置的结构框图。如图5所示，在一些实施例中，该装置可以包括：交互模块52，配置为在下行波长上向光网络单元ONU发送测距请求消息，并在所述ONU支持的上行第一波长上接收测距响应消息；配置模块54，配置为根据所述测距响应消息完成所述下行波长以及所述上行第一波长的测距，并将测距信息在所述下行波长上向所述ONU发送；其中，所述测距信息用于指示所述ONU将发送波长切换为所述ONU支持的上行第二波长；数据传输模块56，配置为在所述上行第二波长与所述OLT进行数据传输；其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围。
这里，可以理解的是，所述上行第一波长与所述上行第二波长的不同会导致上行光信号的传输时间不同，由此所导致的传输时间差(路径传输时间差)应小于所述OLT接收数据时对应的容错范围。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。
为了更好的理解上述的方案，依据上述实施例，还提供了如下的光路结构以便理解。
结构1：
假设上行波长范围为1260nm-1280nm。图6是根据本公开实施例的一种ONU光模块的光路结构图。如图6所示，所述光模块包括用于正常业务数据通讯的光发射组件1(TOSA1)，用于ONU注册的光发射组件2(TOSA2)，以及用于正常接收的光接收组件(ROSA)。其中，TOSA1发射光波长范围为上述上行第一波长的波段范围(1260nm-1265nm)，可基于电吸收调制激光器(EML)，直接调制激光器(DML)，可调谐激光器 等器件实现。为保证TOSA1在整个工作温度范围内发射光波长在注册子波长的波段内，TOSA1还包含温控装置或波长锁定装置等。TOSA2发射光波长范围为上行第二波长的波段范围(1275nm-1280nm)，可基于EML激光器，DML激光器，可调谐激光器等器件实现，为保证TOSA2在整个工作温度范围内发射光波长在业务子波长的波段内，TOSA2还包含温控装置或波长锁定装置等。
进一步地，所述ONU光模块还包括用于TOSA1，TOSA2和ROSA合分波的滤波器1和滤波器2，实现光模块光路单纤输出。所述滤波器1实现TOSA1和TOSA2的低损耗合分波，具体包括对上行第二波长透射，对上行第一波长反射，为降低其合分波损耗，其透射谱和反射谱在业务子波长波段和注册子波长波段需满足串扰极小的条件。所述滤波器2实现合路后的发射端上行第二波长，上行第一波长与ROSA的接收工作波长光信号的低损耗合分波。进一步，在ONU发射机发射光功率满足系统要求的前提下，所述滤波器1还可以由半反半透镜代替。
在一个实施例中，所述ONU光模块还包括控制模块，根据ONU设备发送的控制指令，在ONU注册流程的不同阶段打开、关闭或切换TOSA1、TOSA2。所述ONU光模块还包括控制器、驱动器、TIA(跨阻放大器)等模块，以及通用电处理芯片和通信接口，实现光模块正常工作和光模块与设备之间信息交互。
图7是根据本公开实施例的一种OLT光模块的光路结构图。如图7所示，所述光模块包括用于正常业务和控制数据通讯的光发射组件TOSA，用于上行第二波长的光接收组件1(ROSA1)，以及用于接收ONU上行第一波长的光接收组件2(ROSA2)。其中，ROSA1和ROSA2可采用APD(雪崩二极管)和PIN(positive-intrinsic-negative)等光电检测器件实现，ROSA1仅接收上行第二波长(1275-1280nm)，ROSA2仅接收上行第一波长(1260-1265nm)。用于正常业务通讯的ROSA1通过滤波器1透射端接收ONU发射的业务子波长波段波长，用于ONU注册的ROSA2通过滤波器1反射端接收ONU发射的注册子波长波段波长。OLT光模块滤波器1 满足以下条件：滤波器1对上行第二波长低损耗透射，对上行第一波长低损耗反射，其透射谱和反射谱在业务子波长波段和注册子波长波段需满足串扰极小的条件。
在一个实施例中，所述OLT光模块还包括用于TOSA，ROSA1和ROSA2合分波的滤波器2，实现光模块光路单纤输出。所述滤波器2实现OLT接收到的上行第二波长，上行第一波长与自身发射的工作波长光信号的低损耗合分波。
在一个实施例中，所述OLT光模块还包括控制模块，根据OLT设备发送的控制指令，在注册流程的不同阶段打开或关闭ROSA2。所述OLT光模块还包括控制器，驱动器，TIA等模块，以及通用电处理芯片和通信接口，实现光模块正常工作和光模块与设备之间信息交互。
需要指出的是，上述子波段划分仅为本公开的一个实施例，实际可根据发射机成本，滤波器隔离带大小，以及可用波长资源调整子波段划分范围。
结构2：
在结构1中，将上行波段重新划分子波段，ONU发射端需要两个波长发射机，或者增加可调发射机调谐，一定程度增加了ONU侧光模块成本。本方案的上行第一波长和上行第二波长按偏振态划分，波长范围相同，分别对应注册子波长和业务子波长，例如ONU发射端TE偏振光发送正常业务通讯信息为上行第二波长，TM偏振光发送注册信息为上行第一波长，在OLT接收侧，经过偏振解复用接收后，TE偏振光信号为收到的正常通讯信号，TM偏振光信号为收到的注册信号。本方案中，OLT接收可以采用直接检测偏振解复用接收或相干检测解复用接收，依据系统带宽和光功率预算需求而定，偏振解复用接收可通过偏振分集PD探测以及数字信号处理算法实现，具体不再赘述。
实现上述方案，ONU侧光模块光发射组件的一种光路实现包括TE偏振态激光器，可控偏振旋转器，以及耦合光路等。所述TE偏振态激光器 可为DML、EML、DBR激光器等，可加载正常业务数据，输出TE偏振光至可调控偏振旋转器。可控偏振旋转器根据ONU注册流程不同阶段控制输出光的偏振态为TE或TM偏振态。此为实现偏振态波长划分一种优选实施例，具体ONU还可以通过45度线偏光以及偏振分束合束实现双偏振光输出，一路偏振加载正常业务数据，一路加载注册交互信息。
结构3：
G.989.2定义的TWDM-PON系统上行波长规划Wide band option为1524-1544nm，Reduced band option为1528-1540nm，Narrow band option为1532-1540nm。对于4波TWDM-PON系统而言，上述3个option都有较大的波长冗余，可以使用冗余的波段作为第一上行波长(注册子波长)，而不占用正常工作的4个波长资源。以Narrow band option(1532-1540nm)为例，图8是根据本公开实施例的一种上行第一波长和上行第二波长的划分示意图。如图8所示，上行第二波长波段工作在1531-1534nm，上行第一波长波段工作在1539-1542nm。每个子波段包含4个波长间隔约100GHz间隔的4个波长，上行第二波长波段的4个波长格点为1531.899nm，1532.679nm，1533.460nm，1534.257nm。上行第一波长波段的4个波长格点为1539.755nm，1540.568nm，1541.137nm，1542.137nm，分别与上行第二波长波段的4个波长对应。采用周期性AWG(阵列波导光栅)器件，业务子波长波段中的CH1和注册子波长波段中的CH1从AWG同一个端口输出，...，依次类推业务子波长波段中的CH4和注册子波长波段中的CH4从AWG同一个端口输出。所述周期性AWG用于OLT侧对TWDM-PON系统4路信号进行合分波至单主干光纤。下行波长同样可以基于该器件的周期性，实现业务子波长，注册子波长和下行波长从AWG同一端口复用和解复用。需要说明的是，此处采用周期性AWG作为OLT侧合分波器件，仅为实施例之一，该合分波器还可采用TFF(薄膜滤光片)实现，此时业务子波长波段和注册子波长波段中的CH1～CH4格点定义可不再采用上述定义方式，可根据合分波器具体实现定义。
图9是根据本公开实施例的另一种ONU光模块的光路结构图。如图 9所示，所述光模块包括光发射组件(TOSA)，用于ONU正常通讯和ONU注册，以及用于正常接收的光接收组件(ROSA)。其中，TOSA发射光波长可在业务子波长波段和注册子波长波段之间调谐和切换，可基于EML激光器，DML激光器，可调谐激光器等器件实现，具备约8nm(业务子波长波段范围+隔离子波段范围)的调谐或切换能力等，TOSA还包含温控装置和波长调谐或切换装置等。
所述ONU光模块还包括用于TOSA和ROSA合分波的滤波器1，实现光模块光路单纤输出。如果该模块发射端业务子波长，注册子波长仍位于G.989.2定义TWDM-PON波长规划内，滤波器1可重用原有合分波器件，不需要重新设计。
所述ONU光模块还包括控制模块，根据ONU设备发送的控制指令，在ONU注册流程的不同阶段调谐或切换TOSA的发射光波长。所述ONU光模块还包括控制器，驱动器，TIA等模块，以及通用电处理芯片和通信接口，实现光模块正常工作和光模块与设备之间信息交互。
采用本实施例所述波长规划，OLT光器件使用周期性AWG器件与OLT光模块CH1-CH4以及主干光纤连接，将OLT光模块CH1-CH4发射的下行波长CH1-CH4复用至主干光纤，将主干光纤输入的上行注册子波长CH1-CH4或上行业务子波长CH1-CH4分别解复用至相应的OLT光模块接收。
以CH1为例，所述OLT光模块括用于正常通讯的光发射组件TOSA，用于正常通讯的光接收组件1(ROSA1)，以及用于接收ONU注册波长的光接收组件2(ROSA2)。其中，ROSA1和ROSA2可采用APD和PIN等器件实现，ROSA1仅接收业务子波长，ROSA2仅接收注册子波长。
图10是根据本公开实施例的另一种OLT光模块的光路结构图。如图10所示，用于正常通讯的ROSA1通过滤波器1透射端接收ONU发射的业务子波长波段波长，用于ONU注册的ROSA2通过滤波器1反射端接收ONU发射的注册子波长波段波长。OLT光模块滤波器1满足以下条件： 滤波器1对业务子波长低损耗透射，对注册子波长低损耗反射，其透射谱和反射谱在业务子波长波段和注册子波长波段需满足串扰极小的条件。
所述OLT光模块还包括用于TOSA，ROSA1和ROSA2合分波的滤波器2，实现光模块光路单纤输出。所述滤波器2实现OLT接收到的业务子波长，注册子波长与自身发射的工作波长光信号的低损耗合分波。如果OLT光模块接收到的业务子波长，注册子波长仍位于G.989.2定义的TWDM PON波长规划内，滤波器2可重用TWDM PON的合分波器件，不需要重新设计。
所述OLT光模块还包括控制模块，根据OLT设备发送的控制指令，在注册流程的不同阶段打开或关闭ROSA2。所述OLT光模块还包括控制器，驱动器，TIA等模块，以及通用电处理芯片和通信接口，实现光模块正常工作和光模块与设备之间信息交互。
上述子波段划分仅为本公开的一个实施例，实际可根据发射机成本，滤波器隔离带大小，以及可用波长资源调整子波段划分范围。
另一方面，本公开的实施例还提供了一种存储介质，该存储介质中存储有计算机程序，其中，该计算机程序被设置为运行时执行上述任一项方法实施例中的步骤。
在一个实施例中，上述存储介质可以被设置为存储用于执行以下步骤的计算机程序：步骤S1，光网络单元ONU在所述ONU的上行第一波长上响应光线路终端OLT发送的测距请求消息；步骤S2，所述ONU接收所述OLT发送的测距信息；步骤S3，所述ONU将接收的所述测距信息作为ONU的上行第二波长的测距信息，并根据来自所述OLT的带宽分配在所述上行第二波长上进行数据传输；其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围；所述测距信息是所述OLT通过所述ONU在所述上行第一波长发送的测距响应得出的。
或，步骤S1，光线路终端OLT在下行波长上向光网络单元ONU发送测距请求消息，并在所述ONU支持的上行第一波长上接收测距响应消息；步骤S2，所述OLT根据所述测距响应消息完成所述下行波长以及所述上行第一波长的测距，并将测距信息在所述下行波长上向所述ONU发送；其中，所述测距信息用于指示所述ONU将发送波长切换为所述ONU支持的上行第二波长；步骤S3，所述OLT在所述上行第二波长与所述ONU进行数据传输；其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围。
在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，简称为ROM)、随机存取存储器(Random Access Memory，简称为RAM)、移动硬盘、磁碟或者光盘等各种可以存储计算机程序的介质。
本公开的实施例还提供了一种电子装置，包括存储器和处理器，该存储器中存储有计算机程序，该处理器被设置为运行计算机程序以执行上述任一项方法实施例中的步骤。
在一个实施例中，上述电子装置还可以包括传输设备以及输入输出设备，其中，该传输设备和上述处理器连接，该输入输出设备和上述处理器连接。
在一个实施例中，上述处理器可以被设置为通过计算机程序执行以下步骤：步骤S1，光网络单元ONU在所述ONU的上行第一波长上响应光线路终端OLT发送的测距请求消息；步骤S2，所述ONU接收所述OLT发送的测距信息；步骤S3，所述ONU将接收的所述测距信息作为ONU的上行第二波长的测距信息，并根据来自所述OLT的带宽分配在所述上行第二波长上进行数据传输；其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围；所述测距信息是所述OLT通过所述ONU在所述上行第一波长发送的测距响应得出的。
或，步骤S1，光线路终端OLT在下行波长上向光网络单元ONU发送测距请求消息，并在所述ONU支持的上行第一波长上接收测距响应消息；步骤S2，所述OLT根据所述测距响应消息完成所述下行波长以及所述上行第一波长的测距，并将测距信息在所述下行波长上向所述ONU发送；其中，所述测距信息用于指示所述ONU将发送波长切换为所述ONU支持的上行第二波长；步骤S3，所述OLT在所述上行第二波长与所述ONU进行数据传输；其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围。
本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
通过本公开，由于切换到能维持原有系统的低延迟容量的新的波长。因此，可以解决相关技术中对延迟要求很高的业务PON系统传输延迟难以降低的问题，达到了扩大业务PON系统传输延迟需求的效果。
显然，本领域的技术人员应该明白，上述的本公开的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本公开不限制于任何特定的硬件和软件结合。
以上所述仅为本公开的示例性实施例而已，并不用于限制本公开，对于本领域的技术人员来说，本公开可以有各种更改和变化。凡在本公开的原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (14)

  1. 一种无源光网络的波长切换方法，包括：
    光网络单元ONU在所述ONU支持的上行第一波长上响应光线路终端OLT发送的测距请求消息；
    所述ONU接收所述OLT发送的测距信息；
    所述ONU将接收的所述测距信息作为ONU的上行第二波长的测距信息，并根据来自所述OLT的带宽分配在所述上行第二波长上进行数据传输；
    其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围；所述测距信息是所述OLT通过所述ONU在所述上行第一波长发送的测距响应得出的。
  2. 根据权利要求1所述的方法，其中，所述ONU根据所述测距信息将发送波长切换为所述ONU支持的上行第二波长，包括：
    所述ONU将所述发送波长由所述上行第一波长调谐或切换至所述上行第二波长。
  3. 根据权利要求2所述的方法，其中，在ONU接收来自所述OLT的带宽分配之后，所述方法还包括：
    当所述ONU自身确定进行节能或接收到所述OLT发送的恢复测距信息时，所述ONU将当前的发送波长由所述上行第二波长调谐或切换至所述上行第一波长，其中，所述恢复测距信息用于指示所述ONU将所述发送波长配置为所述上行第一波长。
  4. 根据权利要求1-3任一项所述的方法，其中，所述测距信息至少包括以下其中之一：等效时延，等效时延与线路传输时延的差。
  5. 根据权利要求1-3任一项所述的方法，其中，所述上行第二波长用于承载延迟小于预设延迟阈值的业务。
  6. 根据权利要求1-3任一项所述的方法，其中，所述容错范围与所述ONU与所述OLT之间的上行传输速率相关。
  7. 一种无源光网络的波长配置方法，包括：
    光线路终端OLT在下行波长上向光网络单元ONU发送测距请求消息，并在所述ONU支持的上行第一波长上接收测距响应消息；
    所述OLT根据所述测距响应消息完成所述下行波长以及所述上行第一波长的测距，并将测距信息在所述下行波长上向所述ONU发送；其中，所述测距信息用于指示所述ONU将发送波长切换为所述ONU支持的上行第二波长；
    所述OLT在所述上行第二波长上与所述ONU进行数据传输；
    其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围。
  8. 根据权利要求7所述的方法，其中，所述测距信息至少包括以下其中之一：等效时延，等效时延与线路传输时延的差。
  9. 根据权利要求7所述的方法，其中，所述上行第二波长用于承载延迟小于预设延迟阈值的业务。
  10. 根据权利要求7所述的方法，其中，所述容错范围与所述ONU与所述OLT之间的上行传输速率相关。
  11. 一种无源光网络的波长切换装置，位于光网络单元ONU， 包括：
    响应模块，配置为在所述ONU支持的上行第一波长上响应光线路终端OLT发送的测距请求消息；
    接收模块，配置为接收所述OLT发送的测距信息；
    切换模块，配置为将接收的所述测距信息作为所述ONU的上行第二波长的测距信息，并根据来自所述OLT的带宽分配在所述上行第二波长上进行数据传输；
    其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围；所述测距信息是所述OLT通过所述ONU在所述上行第一波长发送的测距响应得出的。
  12. 一种无源光网络的波长配置装置，位于光线路终端OLT中，包括：
    交互模块，配置为在下行波长上向光网络单元ONU发送测距请求消息，并在所述ONU支持的上行第一波长上接收测距响应消息；
    配置模块，配置为根据所述测距响应消息完成所述下行波长以及所述上行第一波长的测距，并将测距信息在所述下行波长上向所述ONU发送；其中，所述测距信息用于指示所述ONU将发送波长切换为所述ONU支持的上行第二波长；
    数据传输模块，配置为在所述上行第二波长与所述OLT进行数据传输；
    其中，所述上行第一波长与所述上行第二波长之间的波长间隔所导致的路径传输时间差小于所述OLT接收数据时对应的容错范围。
  13. 一种存储介质，其上存储有计算机程序，其中，所述计算机程序被设置为运行时执行所述权利要求1-10任一项中所述的方法。
  14. 一种电子装置，包括存储器和处理器，其中，所述存储器中存储有计算机程序，所述处理器被设置为运行所述计算机程序以执行所述权利要求1-10任一项中所述的方法。
PCT/CN2020/094261 2019-06-17 2020-06-04 无源光网络的波长切换、配置方法及装置 Ceased WO2020253540A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES20826461T ES3005838T3 (en) 2019-06-17 2020-06-04 Wavelength switching and configuration methods and devices for passive optical network
US17/620,216 US12028153B2 (en) 2019-06-17 2020-06-04 Wavelength switching and configuration method and device for passive optical network
EP20826461.4A EP3985992B1 (en) 2019-06-17 2020-06-04 Wavelength switching and configuration methods and devices for passive optical network

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910523626.3A CN112104927B (zh) 2019-06-17 2019-06-17 一种无源光网络的波长切换、配置方法及装置
CN201910523626.3 2019-06-17

Publications (1)

Publication Number Publication Date
WO2020253540A1 true WO2020253540A1 (zh) 2020-12-24

Family

ID=73748562

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/094261 Ceased WO2020253540A1 (zh) 2019-06-17 2020-06-04 无源光网络的波长切换、配置方法及装置

Country Status (5)

Country Link
US (1) US12028153B2 (zh)
EP (1) EP3985992B1 (zh)
CN (1) CN112104927B (zh)
ES (1) ES3005838T3 (zh)
WO (1) WO2020253540A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116546354A (zh) * 2023-05-31 2023-08-04 武汉烽火技术服务有限公司 一种olt设备、onu设备及故障onu远程管控的方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114666683A (zh) * 2020-12-23 2022-06-24 中国移动通信有限公司研究院 光网络单元上线注册方法、光网络单元和光线路终端
CN114666684B (zh) * 2020-12-23 2025-09-19 中国移动通信有限公司研究院 光网络单元上线注册方法、光网络单元和光线路终端
CN114727174B (zh) * 2021-01-05 2025-09-05 中国移动通信有限公司研究院 一种光网络单元注册上线方法、设备及存储介质
CN121218055A (zh) * 2024-06-25 2025-12-26 中兴通讯股份有限公司 无源光网络的信号处理方法、光线路终端及光网络单元

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101394229A (zh) * 2007-09-21 2009-03-25 日立通讯技术株式会社 无源光网络系统和测距方法
CN103840903A (zh) * 2012-11-23 2014-06-04 中兴通讯股份有限公司 工作波长的调谐方法及系统
CN103841474A (zh) * 2012-11-23 2014-06-04 中兴通讯股份有限公司 一种无源光网络中的波长调谐方法、系统及设备
WO2014122525A1 (en) * 2013-02-06 2014-08-14 Alcatel Lucent Method of configuring automatically wavelength of optical network unit
US20170207876A1 (en) * 2012-06-13 2017-07-20 Huawei Technologies Co., Ltd. Wavelength configuration method and apparatus for multi-wavelength passive optical network, and multi-wavelength passive optical network system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100490901B1 (ko) * 2002-12-02 2005-05-24 한국전자통신연구원 이더넷 수동 광통신망에서 서비스 등급별 동적대역 할당방법 및 대역할당장치
US8208815B1 (en) * 2006-11-30 2012-06-26 Marvell International Ltd. Bit accurate upstream burst transmission phase method for reducing burst data arrival variation
US8649681B2 (en) * 2008-12-01 2014-02-11 Telefonaktiebolaget Lm Ericsson (Publ) Methods and devices for wavelength alignment in WDM-PON
US9712241B2 (en) * 2012-04-20 2017-07-18 Mitsubishi Electric Corporation Communication system, master station device, slave station device, control unit, and communication control method
US9577783B2 (en) * 2014-01-23 2017-02-21 Futurewei Technologies, Inc. Optical line terminal communication method and device with data structure
CN107395315A (zh) * 2016-05-16 2017-11-24 中兴通讯股份有限公司 一种无源光网络中的测距方法、光线路终端和光网络单元
ES2906748T3 (es) 2016-11-23 2022-04-20 Huawei Tech Co Ltd Sistema de red óptica pasiva, terminal de línea óptica y unidad de red óptica
EP3382919A4 (en) * 2017-01-24 2019-01-16 Huawei Technologies Co., Ltd. COMMUNICATION METHOD, DEVICE AND SYSTEM FOR PASSIVE OPTICAL NETWORK (PON)
CN111344968B (zh) * 2017-09-05 2023-03-07 丹麦科技大学 光线路终端和容量增加的光纤接入系统
CN109495797B (zh) * 2017-09-13 2022-02-22 中兴通讯股份有限公司 一种无源光网络中onu的管理方法、olt和系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101394229A (zh) * 2007-09-21 2009-03-25 日立通讯技术株式会社 无源光网络系统和测距方法
US20170207876A1 (en) * 2012-06-13 2017-07-20 Huawei Technologies Co., Ltd. Wavelength configuration method and apparatus for multi-wavelength passive optical network, and multi-wavelength passive optical network system
CN103840903A (zh) * 2012-11-23 2014-06-04 中兴通讯股份有限公司 工作波长的调谐方法及系统
CN103841474A (zh) * 2012-11-23 2014-06-04 中兴通讯股份有限公司 一种无源光网络中的波长调谐方法、系统及设备
WO2014122525A1 (en) * 2013-02-06 2014-08-14 Alcatel Lucent Method of configuring automatically wavelength of optical network unit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3985992A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116546354A (zh) * 2023-05-31 2023-08-04 武汉烽火技术服务有限公司 一种olt设备、onu设备及故障onu远程管控的方法

Also Published As

Publication number Publication date
US20220271858A1 (en) 2022-08-25
ES3005838T3 (en) 2025-03-17
EP3985992A4 (en) 2022-08-03
US12028153B2 (en) 2024-07-02
EP3985992A1 (en) 2022-04-20
CN112104927A (zh) 2020-12-18
CN112104927B (zh) 2023-11-17
EP3985992B1 (en) 2024-10-23

Similar Documents

Publication Publication Date Title
WO2020253540A1 (zh) 无源光网络的波长切换、配置方法及装置
RU2562808C2 (ru) Устройство оптического приемопередатчика и система пассивных оптических сетей с мультиплексированием с разделением по длине волны
JP5689424B2 (ja) Ｗｄｍ−ｐｏｎにおける波長アラインメントのための方法および装置
US20140233954A1 (en) Link establishment method for multi-wavelength passive optical network system
US9479254B2 (en) Distributed base station signal transmission system and communication system
CN111355554B (zh) 路由合波器、路由合波方法、波分路由方法及网络系统
Cheng Flexible TWDM PON with WDM overlay for converged services
WO2007071154A1 (fr) Reseau optique passif a multiplexage par repartition en longueur d'onde et son procede de mise en oeuvre
EP3672122B1 (en) Calibration apparatus and method, and wavelength division multiplexing system
US12308886B2 (en) Optical transceiver device and optical network system
TW201526560A (zh) 動態波長分配光路由及應用此光路由的終端裝置
US20150207583A1 (en) Transmission apparatus and transmission system
CN101536537B (zh) 管理光接入网中的连接的方法以及相关的平台、交换局、网络和计算机软件产品
US9831946B2 (en) Optical transmitter and transmission method, and optical receiver and receiption method
CN104378171B (zh) 光线路终端、光网络单元以及光通信系统
US10805033B2 (en) Optical line terminal, and signal transmission method and device
WO2012106920A1 (zh) 光模块及其突发发射方法、激光器及光网络系统
CN108633325A (zh) 一种无源光网络pon的通信方法、装置和系统
CN105025401A (zh) 一种基于子网扩展的twdm-pon结构、设备及控制方法
WO2017147844A1 (zh) 一种复用/解复用器及无源光网络系统
CN106165327B (zh) 一种光线路终端、光网络单元及无源光网络系统
Lee ONU Interconnection for Reducing Latency in TWDM-PON Based Mobile Front-and Middle-Hauls by using Wavelength Mobility
CN121940668A (zh) 无色化光网络单元及无色化光网络接入方法
Liu et al. A novel wavelength sharing TWDM-PON architecture with tunable laser and multi-free-spectral-range AWGR
Lin et al. TWDM-PON: System, standards and key technologies

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20826461

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2020826461

Country of ref document: EP

Effective date: 20220117