WO2013185306A1 - 多波长无源光网络的波长配置方法、系统和装置 - Google Patents

多波长无源光网络的波长配置方法、系统和装置 Download PDF

Info

Publication number
WO2013185306A1
WO2013185306A1 PCT/CN2012/076848 CN2012076848W WO2013185306A1 WO 2013185306 A1 WO2013185306 A1 WO 2013185306A1 CN 2012076848 W CN2012076848 W CN 2012076848W WO 2013185306 A1 WO2013185306 A1 WO 2013185306A1
Authority
WO
WIPO (PCT)
Prior art keywords
wavelength
downlink
onu
uplink
olt
Prior art date
Application number
PCT/CN2012/076848
Other languages
English (en)
French (fr)
Inventor
高波
林华枫
高建河
叶飞
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP12878781.9A priority Critical patent/EP2863564A4/en
Priority to CN201280000516.5A priority patent/CN103636153B/zh
Priority to KR1020157000712A priority patent/KR101688445B1/ko
Priority to MX2014015374A priority patent/MX338111B/es
Priority to JP2015516400A priority patent/JP5967744B2/ja
Priority to AU2012382310A priority patent/AU2012382310B2/en
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to SG11201408322YA priority patent/SG11201408322YA/en
Priority to RU2015100260/07A priority patent/RU2581625C1/ru
Priority to PCT/CN2012/076848 priority patent/WO2013185306A1/zh
Publication of WO2013185306A1 publication Critical patent/WO2013185306A1/zh
Priority to US14/569,682 priority patent/US9647791B2/en
Priority to US15/474,890 priority patent/US20170207876A1/en

Links

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
    • H04J14/0228—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths
    • H04J14/023—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON]
    • H04J14/0232—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON] for downstream transmission
    • 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
    • H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
    • H04J14/0246—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU using one wavelength per ONU
    • 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
    • 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
    • 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
    • H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
    • H04J14/0247—Sharing one wavelength for at least a group of ONUs
    • 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
    • H04J14/0227—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
    • H04J14/0252—Sharing one wavelength for at least a group of ONUs, 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
    • H04J14/0227—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
    • H04J14/0227—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
    • H04J14/0258—Wavelength identification or labelling
    • 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
    • H04J14/0267—Optical signaling or routing
    • 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
    • H04J14/0267—Optical signaling or routing
    • H04J14/0269—Optical signaling or routing using tables for routing
    • 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
    • H04J14/0272—Transmission of OAMP information
    • H04J14/0275—Transmission of OAMP information using an optical service channel
    • 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

Definitions

  • the present application mainly relates to optical communication technologies, and in particular, to a multi-wavelength passive optical network
  • the traditional PON system is a point-to-multipoint network system based on Time Division Multiplexing (TDM) mechanism.
  • TDM Time Division Multiplexing
  • the PON system usually includes an Optical Line Terminal (OLT) located at the office side.
  • OLT Optical Line Terminal
  • ODN optical distribution network
  • the ODN is used to distribute or multiplex data signals between the OLT and the ONU, so that the multiple ONUs can share an optical transmission channel.
  • the direction from the OLT to the ONU is called downlink.
  • the OLT broadcasts the downlink data stream to all ONUs according to the TDM mode.
  • Each ONU only receives data with its own identity; from the ONU to the OLT.
  • the PON system uses the Time Division Multiple Access (TDMA) mode in the uplink direction, that is, the OLT for each of the ONUs to share the optical transmission channel.
  • TDMA Time Division Multiple Access
  • the PON system uses the Time Division Multiple Access (TDMA) method in the uplink direction.
  • the ONU allocates time slots, and each ONU sends uplink data strictly according to the time slot allocated by the OLT.
  • the above PON system is affected by the time division characteristics of the TDM mechanism, and the available bandwidth of the user is usually limited, and on the other hand, the available bandwidth of the optical fiber itself cannot be effectively utilized, and thus the demand for the emerging broadband network application service cannot be met.
  • WDM Wavelength Division Multiplexing
  • the industry proposes a hybrid PON system combining Wavelength Division Multiplexing (WDM) technology and TDM technology.
  • WDM Wavelength Division Multiplexing
  • TDM Time Division Multiplexing
  • the OLT supports data transmission and reception at multiple wavelength channels at the same time, and each ONU operates in one of the wavelength channels, and in the downlink direction, the OLT uses each wavelength channel to correspond to each other.
  • the downstream wavelength broadcasts the downlink data to the plurality of ONUs operating in the wavelength channel; and in the uplink direction, the ONU of each wavelength channel can adopt the upstream wavelength of the wavelength channel in the time slot allocated by the OLT to the
  • the OLT sends uplink data.
  • the ONU usually adopts a wavelength tunable optical transceiver component, so the ONU needs to first perform the working wavelength configuration during initialization. However, if the downlink receiving wavelength or the uplink transmitting wavelength configured by the ONU is not supported by the OLT, the ONU cannot be registered normally. 'Invention content
  • the present application provides a wavelength configuration method for a multi-wavelength passive optical network that can effectively ensure that the ONU is properly registered. Moreover, based on the wavelength switching method, the present application further provides a multi-wavelength passive optical network system and apparatus.
  • a wavelength configuration method for a multi-wavelength passive optical network comprising: an ONU scanning a downlink receiving wavelength, and receiving, in the downlink receiving wavelength scanning process, a broadcast by the OLT through each downlink wavelength channel of the multi-wavelength passive optical network system Determining the downlink wavelength information of the downlink wavelength channel; the ONU establishing a downlink receiving wavelength mapping table according to the downlink wavelength information, where the entries of the downlink receiving wavelength mapping table include downlink receiving wavelength information, downlink optical receiver driving current information, and ONU Receiving an optical physical parameter; the ONU selects a downlink wavelength in the downlink wavelength information broadcasted by the OLT, and uses the downlink optical receiver driving current information recorded according to the related entry in the downlink receiving wavelength mapping table, and the downlink is performed.
  • the operating wavelength of the optical receiver is set to the selected downstream wavelength.
  • a wavelength configuration apparatus for a multi-wavelength passive optical network comprising: a receiving module, configured to scan a downlink receiving wavelength, and receive an OLT through each downlink wavelength channel of the multi-wavelength passive optical network system during the downlink receiving wavelength scanning process a downlink wavelength information of the downlink wavelength channel that is separately broadcasted; a wavelength mapping table establishing module, configured to establish a downlink connection according to the downlink wavelength information Receiving a wavelength mapping table, the entry of the downlink receiving wavelength mapping table includes downlink receiving wavelength information, downlink optical receiver driving current information, and ONU receiving optical physical parameter; and a wavelength configuration module, configured for downlink wavelength information broadcasted by the OLT Selecting a downlink wavelength, and setting the operating wavelength of the downlink optical receiver to the selected downlink wavelength according to the downlink optical receiver driving current information recorded by the related entries in the downlink receiving wavelength mapping table.
  • a multi-wavelength passive optical network system comprising: at least one OLT and a plurality of ONUs, wherein the at least one OLT is connected to the plurality of ONUs in a point-to-multipoint manner through an optical distribution network, wherein the ONU includes A wavelength arranging device for a multi-wavelength passive optical network as described above.
  • the ONU performs wavelength scanning in the initialization process and interacts with the OLT to establish a corresponding wavelength mapping table, thereby ensuring that the transmitting and receiving wavelengths of the ONU configuration are in the
  • the normal initialization of the ONU transmission and reception wavelength is realized within the wavelength range supported by the OLT.
  • FIG. 1 is a schematic diagram of a network architecture of a passive optical network system based on a time division multiplexing mechanism.
  • 2 is a schematic diagram of a network architecture of an embodiment of a multi-wavelength passive optical network system provided by the present application.
  • FIG. 3 is a flow chart of a first embodiment of a wavelength switching method for a multi-wavelength passive optical network provided by the present application.
  • FIG. 4 is a schematic diagram of using XGTC frame carrier length information in the wavelength switching method of the multi-wavelength passive optical network shown in FIG. 3.
  • FIG. 5 is a schematic diagram of using PLOAM message to carry wavelength information in a wavelength switching method of the multi-wavelength passive optical network shown in FIG. 3.
  • FIG. FIG. 6 is a schematic structural diagram of an embodiment of a wavelength switching device for a multi-wavelength passive optical network provided by the present application.
  • the multi-wavelength PON system 100 includes at least one optical line termination (OLT) 110, a plurality of optical network units (ONUs) 120, and an optical distribution network (ODN) 130, wherein the OLT 110 passes the ODN 130 at a point.
  • OLT optical line termination
  • ONUs optical network units
  • ODN optical distribution network
  • a multipoint manner is connected to the plurality of ONUs 120, wherein the plurality of ONUs 120 share an optical transmission medium of the ODN 130.
  • the ODN 130 may include a trunk fiber 131, an optical branching module 132, and a plurality of branch fibers 133, wherein the optical branching module 132 may be disposed at a remote node (RN), which passes through the trunk on one hand.
  • the optical fiber 131 is connected to the OLT 110, and on the other hand is connected to the plurality of ONUs 120 via the plurality of branch fibers 133, respectively.
  • the communication link between the OLT 110 and the plurality of ONUs 120 may include a plurality of upstream wavelength channels and a plurality of downstream wavelength channels.
  • the plurality of downlink wavelength channels also share the optical transmission medium of the ODN by wavelength division multiplexing (WDM), and each ONU 120 can operate at one of the downstream wavelengths of the multi-wavelength PON system 100.
  • WDM wavelength division multiplexing
  • each downlink wavelength channel can carry downlink traffic of one or more ONUs 120; and ONUs 120 operating in the same downlink wavelength channel can share the downlink wavelength channels by time division multiple access (TDM).
  • TDM time division multiple access
  • the multiple uplink wavelength channels share the optical transmission medium of the ODN 130 by WDM, and each ONU 120 can operate in one of the upstream wavelength channels of the multi-wavelength PON system 100, each upstream wavelength.
  • the channel can carry one or The uplink services of the plurality of ONUs 120; and the ONUs 120 operating in the same upstream wavelength channel can share the uplink wavelength channels by time division multiple access (TDMA).
  • TDMA time division multiple access
  • the multi-wavelength PON system 100 has four uplink wavelength channels and a downlink wavelength channel as an example. It should be understood that, in practical applications, the multi-wavelength PON system 100 The number of uplink and downlink wavelength channels can also be determined according to network needs.
  • the four upstream wavelength channels of the multi-wavelength PON system 100 are respectively named as the upstream wavelength channel 1 (using the first upstream wavelength ⁇ 1) and the upstream wavelength channel 2 (using the second upstream wavelength ⁇ 2).
  • the upstream wavelength channel 3 (using the third upstream wavelength ⁇ 3) and the upstream wavelength channel 4 (using the fourth upstream wavelength ⁇ 4), and the four downstream wavelength channels are respectively named as the downstream wavelength channel 1 (using the first downstream wavelength ⁇ ) (11)
  • Downstream wavelength channel 2 (using a second downlink wavelength ⁇ (12)
  • a downlink wavelength channel 3 (using a third downlink wavelength ⁇ (13) and a downstream wavelength channel 4 (using a fourth downlink wavelength ⁇ (14)).
  • Each of the upstream wavelength channel and the downlink wavelength channel may have a corresponding wavelength channel identifier (for example, a channel number), that is, the uplink wavelength channel identifier has a matching relationship with an uplink wavelength of the identified upstream wavelength channel.
  • the OLT 110 and the ONU 120 can learn the uplink wavelength of the uplink wavelength channel according to the identifier of the uplink wavelength channel.
  • the downlink wavelength channel identifier has the same matching relationship with the downlink wavelength of the downlink wavelength channel that it identifies.
  • the OLT 110 and the ONU 120 can learn the downlink wavelength of the downlink wavelength channel according to the downlink wavelength channel identifier.
  • the OLT 110 may include an optical coupler 111, a first wavelength division multiplexer 112, a second wavelength division multiplexer 113, and a plurality of downstream optical transmitters Tx1 ⁇ Tx4. And a plurality of upstream optical receivers Rx1 R Rx4 and a processing module 114.
  • the plurality of downstream optical transmitters Tx1 to Tx4 are connected to the optical coupler 111 by the first wavelength division multiplexer 112, and the plurality of upstream optical receivers Rx1 R Rx4 pass the second wave.
  • a sub-multiplexer 113 is connected to the optical coupler 111, which is further connected to the trunk optical fiber 131 of the ODN 130.
  • the emission wavelengths of the plurality of downstream optical transmitters Tx1 to Tx4 are different, and each of the downstream optical transmitters Tx1 to Tx4 may respectively correspond to one of the downlinks of the multi-wavelength chirp system 100.
  • the wavelength channel for example, the emission wavelengths of the plurality of downstream light emitters Tx1 ⁇ Tx4 may be respectively ⁇ (11 ⁇ (14.
  • the downlink light emitters Txl ⁇ Tx4 may respectively use their emission wavelengths ⁇ (11 ⁇ (14)
  • the downlink data is transmitted to the corresponding downlink wavelength channel, so as to be received by the ONU 120 operating in the downlink wavelength channel.
  • the receiving wavelengths of the plurality of uplink optical receivers Rx1 to Rx4 may be different, wherein Each of the upstream optical receivers Rx1 to Rx4 also respectively corresponds to one of the upstream wavelength channels of the multi-wavelength passive optical network system 100.
  • the emission wavelengths of the plurality of upstream optical receivers Rx1 to Rx4 may be respectively ⁇ 1 ⁇ 4
  • the upstream optical receivers Rx1 to Rx4 can receive uplink data transmitted by the ONUs 120 operating in the corresponding upstream wavelength channels by using the receiving wavelengths ⁇ 1 to ⁇ 4, respectively.
  • the first wavelength division multiplexer 112 is configured to respectively transmit the wavelengths of the plurality of downlink optical transmitters Tx1 TTx4 to ⁇ (11 ⁇ (14 downlink data for wavelength division multiplexing processing, and
  • the optical coupler 111 transmits to the trunk fiber 131 of the ODN 130 to provide the downlink data to the ONU 120 through the ODN 130.
  • the optical coupler 111 can also be used to
  • the uplink data of the ONUs 120 and having wavelengths of ⁇ ! ⁇ !4 are respectively supplied to the second wavelength division multiplexer 113, and the second wavelength division multiplexer 113 can respectively set the wavelengths to ⁇ ! ⁇
  • the uplink data of ⁇ !4 is demultiplexed to the upstream optical receivers Rx1 to Rx4 for data reception.
  • the processing module 114 may be a Media Access Control (MAC) module, which may provide downlink data to be sent to the ONU 120 to the UI device according to a downlink wavelength channel operated by the ONU 120. a downlink optical transmitter corresponding to the downlink wavelength channel, so that the downlink optical transmitter transmits the downlink data to the wavelength channel, and on the other hand, the processing module 114 can also be used for each uplink optical receiver Rx1 ⁇ The uplink data received by Rx4 is processed.
  • MAC Media Access Control
  • the operating wavelength of the ONU 120 (including the uplink transmit wavelength and the downlink receive wavelength) is adjustable.
  • the ONU 120 may include an optical coupler 121, a downstream optical receiver 122, and an upstream optical transmitter 123. And processing module 124.
  • the downlink optical receiver 122 and the upstream optical transmitter 123 are both wavelength tunable devices, and the two can be connected by the optical coupler 121.
  • the branch fiber corresponding to the ONU 120 is received.
  • the optical coupler 121 may provide uplink data sent by the upstream optical transmitter 123 to the branch optical fiber 133 of the ODN 130 to be sent to the OLT 110 through the ODN 130 on the one hand;
  • the optical coupler 121 can also provide downlink data sent by the OLT 110 through the ODN 130 to the downlink optical receiver 122 for data reception.
  • the processing module 124 may be a MAC module, which may control the downlink optical receiver 122 and the upstream optical transmitter 123 to perform wavelength adjustment according to requirements, and may, on the other hand, be sent to the specified time slot.
  • the uplink data of the OLT 110 is provided to the upstream optical transmitter 123 to be sent to the OLT 110 through the corresponding upstream wavelength channel by the upstream optical transmitter 123, and the downlink received by the downstream optical receiver 122. The data is processed.
  • FIG. 3 is a flowchart of a wavelength configuration method of a multi-wavelength passive optical network according to an embodiment of the present application.
  • the wavelength configuration method may include:
  • Step S10 The OLT periodically broadcasts the downlink wavelength information of the downlink wavelength channel and the uplink wavelength information that can be used by the ONU to be periodically broadcasted in each downlink wavelength channel of the multi-wavelength PON system.
  • the MAC module of the central OLT can provide the downlink wavelength information of each downlink wavelength channel to the corresponding downlink optical transmitters Tx1 to Tx4, and control the downlink optical transmitters Tx1 to Tx4 to pass each downlink wavelength channel period.
  • the downlink wavelength information is broadcast to the ONU on the user side.
  • the downlink wavelength information broadcasted by the OLT in each wavelength channel may be the channel identification information of the downlink wavelength channel, for example, the downlink wavelength channel, in each embodiment. No..
  • the MAC module of the OLT can also combine the number of ONUs of the actual lines of the respective uplink wavelength channels, and obtain the uplink wavelength information available for registration by the ONU according to the wavelength channel ONU number equalization algorithm, that is, the available uplink wavelength information;
  • the MAC module may provide the uplink wavelength information to the downlink optical transmitters Tx1 to Tx4, so that the downlink optical transmitters Tx1 to Tx4 can broadcast the downlink wavelength information through the respective downlink wavelength channels.
  • a broadcast of available upstream wavelength information may be used to broadcast.
  • the downlink wavelength information and the uplink wavelength information may be through an XGPON Transmission Conversion (XGTC) frame, a GPON Transmission Conversion (GTC) frame, or a logical link identifier (Logic Link).
  • XGTC XGPON Transmission Conversion
  • GTC GPON Transmission Conversion
  • Logic Link logical link identifier
  • Identifier, LLID Ethernet frames (g ⁇ EPON frames) are carried.
  • the XGTC frame includes an XGTC frame header and an XGTC payload, where the XGTC frame header includes an optical network unit identifier (ONU-ID), for example, the XGTC frame is used to carry the downlink wavelength information and the uplink wavelength information.
  • ONU-ID optical network unit identifier
  • the XGTC frame is used to carry the downlink wavelength information and the uplink wavelength information.
  • a field an indication (Ind) field, a Hybrid Error Correction (HEC) field, and a Physical Layer Operations (Administration and Maintenance upstream, PLOAMu) field, where the downlink wavelength information and the uplink
  • the wavelength information can be carried by the Ind field.
  • the Ind field of the XGTC frame header defined by the existing XGPON standard is reserved with a reserved field of 9 bits.
  • the downlink wavelength information and the uplink wavelength information may be utilized in the Ind of the XGTC frame header.
  • the reserved field of the field is carried as shown
  • the downlink wavelength information and the uplink wavelength information may be through a physical layer operation (Administration and Maintenance, PLOAM) message, an optical network terminal management and a control interface (ONT Management and Control Interface (OMCI) messages, Multi-Point Control Protocol (MPCP) messages, or Operation Administration and Maintenance (OAM) messages are carried.
  • PLOAM Physical layer operation
  • OMCI optical network terminal management and a control interface
  • MPCP Multi-Point Control Protocol
  • OFAM Operation Administration and Maintenance
  • the specific message formats such as field values and field lengths can be based on Actually, depending on the needs; of course, in other alternative embodiments, the OLT 110 can also pass The newly defined message carries the downlink wavelength switching command.
  • FIG. 5 is a schematic diagram of a message format of a PLOAM message, where the PLOAM message usually includes an optical network unit identifier (ONU ID) field, and a message identifier.
  • the PLOAM message is used to carry the downlink wavelength information and the uplink wavelength information. (Message ID) field, Sequence No. field, Data field, and Integrity Check field.
  • the downlink wavelength information and the uplink wavelength information may be carried in a data field of the PLOAM message.
  • the PLOAM message may be in the format shown in the following table:
  • Step S20 The ONU scans the downlink receiving wavelength, receives the downlink receiving optical physical parameter, and establishes a downlink receiving wavelength mapping table.
  • the downlink receiving wavelength mapping table entries include downlink receiving wavelength information, downlink optical receiver driving current information, and ONU receiving. Photophysical parameters.
  • the ONU can scan the downlink receiving wavelength within the maximum wavelength receiving range of the wavelength-adjustable downlink optical receiver, for example, by adjusting the driving current of the downlink optical receiver to gradually change the downlink receiving wavelength, and receiving in the downlink.
  • the downlink optical signals broadcast by the respective downlink wavelength channels are respectively received.
  • the tunable optical receiver can provide a message (such as a PLOAM message) or a data frame (such as an XGTC frame) that receives the received downlink wavelength information and the uplink wavelength information to the MAC module of the ONU.
  • the ONU receiving optical physical parameter may be a peak value of the ONU receiving photocurrent (ie, the photo-generated current of the downstream optical receiver of the ONU).
  • the ONU detects the ONU receiving photocurrent during the downlink receiving wavelength scanning process, and searches for the peak value of the ONU receiving photocurrent.
  • the ONU may record the driving current of the current downlink optical receiver and the message or data frame received from the MAC module to extract the downlink of the current ONU.
  • the downlink wavelength information of the wavelength channel is set, and the downlink receiving wavelength mapping entry is established according to the foregoing three parameters, that is, the downlink receiving wavelength mapping entry includes downlink receiving wavelength information, downlink optical receiver driving current information, and ONU receiving optical current peak value.
  • the ONU receiving optical physical parameter may also be an ONU receiving optical power peak or Received Signal Strength Indication (RSI) information.
  • the ONU detects the ONU received optical power or RSSI during the downlink reception wavelength scanning process, and searches for the ONU received optical power or the peak of the RSSI.
  • the ONU can record the driving current of the current downlink optical receiver and the downlink wavelength information of the downlink wavelength channel in which the current ONU is located by extracting the message or data frame received from the MAC module.
  • the downlink receiving wavelength mapping entry includes downlink receiving wavelength information, downlink optical receiver driving current information, and ONU receiving optical power or RSSI peak.
  • the ONU receiving optical physical parameter may also be other physical parameters related to the ONU receiving light, and correspondingly, the ONU detects the downlink receiving wavelength scanning process. The physical parameter is set, and the downlink receiving wavelength mapping entry is established according to the detected physical parameter.
  • the downlink receiving wavelength scan of the ONU may traverse all downlink receiving wavelengths supported by the downlink optical receiver or the entire downlink wavelength receiving range of the downlink optical receiver, and establish one or more downlink receiving wavelengths. Mapping table entries. After completing the downlink receiving wavelength scanning, the ONU may establish a downlink receiving wavelength mapping table including one or more entries, where each entry corresponds to a different downlink receiving wavelength.
  • Step S30 the ONU selects a downlink receiving wavelength, and sets the working wavelength of the downlink optical receiver to the selected downlink receiving according to the downlink optical receiver driving current information recorded by the related entries in the downlink receiving wavelength mapping table. wavelength.
  • the ONU may select a downlink receiving wavelength according to a preset wavelength configuration requirement or randomly, and look up the downlink receiving wavelength mapping table to receive from the selected downlink. Downstream light reception in the corresponding entry of the wavelength
  • the machine drives current information, and adjusts a driving current of the downlink optical receiver according to the downlink optical receiver driving current information, so as to set a downlink receiving wavelength of the downlink optical receiver to the selected downlink receiving wavelength.
  • Step S40 The ONU scans an uplink transmission wavelength, and reports a registration request to the OLT in a registration authorization time slot provided by the OLT.
  • the start condition of the step may be set as follows: The ONU may correctly receive the registration authorization information of the OLT through the downlink broadcast, but has not been registered normally.
  • the end condition of the step may be set as follows: the ONU is successfully registered; or the ONU receives the stop uplink transmission wavelength adjustment instruction delivered by the OLT.
  • the ONU can perform the uplink transmission wavelength scanning by gradually changing the driving current within a range of values of the driving current supported by the upstream optical transmitter. For example, during initialization, the ONU may select a boundary value of the range of the driving current as an initial current value, and increment or decrement by a preset amount of change based on the initial current value until the The drive current value reaches another boundary value of the range of values.
  • the uplink transmission wavelength of the upstream optical transmitter is gradually adjusted according to the increment or decrement of the driving current, thereby implementing the uplink transmission wavelength scanning of the upstream optical transmitter.
  • the driving current value reaches another boundary value of the value range, if the end condition is not currently met, the ONU may re-adjust the driving current of the upstream optical transmitter to an original boundary value (ie, Initial current value), resume the upstream transmission wavelength scan.
  • the downlink optical receiver of the ONU may receive the registration authorization information broadcast by the OLT through the corresponding downlink wavelength channel by using the selected downlink receiving wavelength, and therefore, the ONU may notify
  • the upstream optical transmitter may be adjusted to the uplink optical transmitter according to the current registration optical transmission time slot provided by the OLT to the ONU.
  • the upstream transmission wavelength corresponding to the drive current value is sent to the OLT to issue an ONU registration request.
  • the MAC module of the ONU may further determine whether an ONU ID (ONU ID) allocation message fed back by the OLT is received between the preset time periods, and may not be received within a preset time period.
  • the MAC module may consider that the OLT does not support the uplink transmission wavelength of the current uplink optical transmitter (that is, the ONU cannot be normally registered when the uplink transmission wavelength is used), and thus the foregoing Scanning rules continue to adjust the driving current of the upstream optical transmitter, control the upstream optical transmitter to maintain the uplink transmission wavelength scan, and resend the ONU registration request to the OLT in the next registered authorization time slot allocated by the OLT. Until the ONU ID assignment message sent by the OLT is successfully received (ie, the ONU is successfully registered).
  • Step S50 The OLT sends an uplink transmission wavelength adjustment command to the ONU, and detects an OLT receiving optical physical parameter in the uplink transmission wavelength adjustment process of the ONU, and establishes an uplink receiving wavelength mapping table, where the uplink receiving wavelength mapping is performed.
  • the entries of the table include uplink receiving wavelength information, OLT receiving optical physical parameters, and ONU serial number information.
  • the OLT receiving optical physical parameter may be an OLT receiving photocurrent peak, an OLT receiving optical power peak, or an RSSI peak.
  • the OLT can detect the OLT receiving photocurrent corresponding to the uplink optical signal sent by the ONU (ie, the photo-generated current of the upstream optical receiver of the OLT) And recording the photocurrent of the OLT, and after the ONU completes registration, the OLT may accumulate the number of registrations of the ONU in the wavelength channel.
  • the OLT may send an uplink transmission wavelength adjustment command to the ONU, and instruct the ONU to perform uplink transmission wavelength fine adjustment according to the uplink transmission wavelength scanning rule of step S40, and the ONU may adjust the The driving current of the upstream optical transmitter is used to implement fine adjustment of the uplink transmission wavelength until receiving the stop uplink transmission wavelength adjustment command sent by the OLT.
  • the OLT may perform photo-generated current detection on the uplink optical signal sent by the ONU through the corresponding uplink wavelength channel during the uplink transmission wavelength fine-tuning process of the ONU, thereby acquiring and recording
  • the OLT receives the photocurrent value.
  • the MAC module of the OLT may search for a series of OLT received photocurrent values to the 0LT received photocurrent peak, and establish a photocurrent peak value and an uplink wavelength information corresponding to the peak according to the OLT.
  • the uplink receives the wavelength mapping entry.
  • the uplink receiving wavelength mapping entry may include uplink receiving wavelength information, OLT receiving photocurrent peak information, and ONU serial number information.
  • the uplink receiving wavelength information may be channel identification information (such as a wavelength channel number) of the uplink wavelength channel carrying the uplink optical signal when the OLT detects the peak of the optical current, or uplink wavelength information of the wavelength channel. . of course,
  • the OLT receives optical physical parameters using an OLT to receive optical power or RSSI peaks or other physical parameters
  • the OLT performs related physical parameters in an uplink transmission wavelength fine adjustment process of the ONU.
  • the OLT received photocurrent peak information in the uplink reception wavelength mapping table is detected, and the OLT receiving optical power or RSSI peak or other physical parameters is replaced.
  • the uplink transmission wavelength scan of the ONU may traverse all uplink transmission wavelengths supported by the uplink optical transmitter or the entire uplink wavelength transmission range of the uplink optical transmitter, thereby, the OLT may establish a Or multiple uplink receiving wavelength mapping entries.
  • the OLT may establish an uplink receiving wavelength mapping table including one or more entries, where each entry corresponds to a different uplink receiving wavelength.
  • Step S60 The OLT sends the uplink receiving wavelength information to the ONU, and the ONU establishes an uplink sending wavelength mapping table according to the uplink receiving wavelength information, where an entry of the uplink sending wavelength mapping table includes an uplink sending wavelength.
  • Information and upstream optical transmitter drive current information.
  • the MAC module of the OLT can compare the currently detected OLT received photocurrent value with the recorded OLT received photocurrent peak value. And determining whether the deviation between the two is less than a preset threshold. If the threshold is smaller than the threshold, the current uplink sending wavelength of the ONU and the OLT are currently considered to be The row receiving wavelength is aligned, and the OLT can send the uplink wavelength information of the uplink wavelength channel corresponding to the peak of the optical current received by the OLT to the ONU.
  • the ONU may establish a corresponding uplink transmission wavelength mapping table, where the uplink transmission wavelength mapping table entry may include uplink transmission wavelength information (that is, uplink wavelength information provided by the OLT). And the upstream optical transmitter of the ONU drives current information.
  • uplink transmission wavelength mapping table entry may include uplink transmission wavelength information (that is, uplink wavelength information provided by the OLT).
  • the OLT may consider that the ONU has completed establishing an uplink transmission wavelength mapping table, and at this time, the OLT may send the uplink OLT to the ONU.
  • the uplink transmission wavelength scan command is stopped to instruct the ONU to stop the uplink transmission wavelength scanning, and the OLT may further clear the number of registrations of the ONU in the uplink wavelength channel.
  • Step S70 the ONU queries the uplink optical transmitter driving current information recorded by the related entry of the uplink transmission wavelength mapping table according to the uplink wavelength information that is available for the ONU to be used for the downlink broadcast of the OLT, and according to the driving.
  • the current information sets an uplink transmission wavelength of the upstream optical transmitter.
  • the ONU may query the uplink transmission wavelength mapping table established by the MAC module according to the uplink wavelength information that is available for registration by the ONU. Correlating the entry, obtaining uplink optical transmitter driving current information recorded by the entry corresponding to the uplink wavelength information that is available for the ONU to be used by the OLT, and setting the uplink optical transmitter according to the driving current information.
  • the driving current is set to set an uplink transmission wavelength of the upstream optical transmitter to an uplink wavelength that is resolved by the MAC module for registration by the ONU.
  • the wavelength configuration method of the multi-wavelength passive optical network may further include:
  • Step S80 The ONU detects, according to the downlink receiving wavelength mapping table, whether a downlink receiving wavelength of the downlink optical receiver drifts, and calibrates the downlink receiving wavelength when a drift occurs. Specifically, during normal communication, the ONU can monitor the ONU receiving photocurrent (or the ONU receiving optical power or RSSI), and the monitored ONU receives the photocurrent value (or the ONU receiving optical power value or RSSI). And comparing with the ONU receiving photocurrent peak (or the ONU receiving optical power peak or the RSSI peak) recorded in the related entry of the downlink receiving wavelength mapping table, if the deviation between the two exceeds a preset threshold, The downlink receiving wavelength of the downlink optical receiver of the ONU drifts.
  • the ONU receiving photocurrent or the ONU receiving optical power or RSSI
  • the ONU may arbitrarily select one direction to adjust the downlink receiving wavelength of the downlink optical receiver, and continue to measure the ONU receiving optical current (or the ONU receiving optical power value or RSSI value) during the adjustment process, if the measured When the ONU receives the photocurrent value (or the ONU received optical power value or the RSSI value), the downlink receiving wavelength is adjusted in the opposite direction until the measured ONU receives the optical current value (or the ONU receives the optical power value or the RSSI value). And a deviation between the received photocurrent peak (or the ONU received optical power peak or the RSSI peak) of the ONU is less than the preset threshold.
  • Step S90 The OLT monitors whether the uplink transmit wavelength of the ONU drifts according to the uplink receive wavelength mapping table, and instructs the ONU to calibrate the uplink transmit wavelength when a drift occurs.
  • the OLT may monitor the optical current received by the OLT (or the OLT receiving optical power or RSSI), and the monitored OLT receives the optical current value (or the OLT receives the optical power value or RSSI). And comparing with the OLT received optical current peak (or OLT received optical power peak or RSSI peak) recorded in the related entry of the uplink receiving wavelength mapping table, if the deviation between the two exceeds a preset threshold, it is considered The uplink transmit wavelength of the upstream optical transmitter of the ONU drifts.
  • the OLT may send a wavelength adjustment command to the ONU, instructing the ONU to arbitrarily select one direction to adjust an uplink transmission wavelength of the uplink optical transmitter, and the OLT adjusts an uplink transmission wavelength of the ONU.
  • the OLT receives the photocurrent (or the OLT receiving optical power value or the RSSI value), and if the measured OLT received photocurrent value (or the OLT received optical power value or RSSI value) decreases, the ONU is re-routed.
  • the deviation between the received photocurrent value (or OLT received optical power value or RSSI value) and the OLT received photocurrent peak (or OLT received optical power peak or RSSI peak) is less than the predetermined threshold.
  • the ONU performs wavelength scanning during the initialization process and interacts with the OLT to establish a corresponding wavelength mapping table, thereby ensuring that the transmitting and receiving wavelengths of the ONU configuration are The wavelength range of the OLT is supported, and the normal initialization of the ONU transmission and reception wavelength is implemented.
  • the wavelength mapping table whether the transmission and reception wavelength of the ONU is drifted in real time during normal communication may occur. Automatic adjustment during drift to ensure signal reception quality and reduce bit error rate.
  • FIG. 6 is a schematic structural diagram of an embodiment of a wavelength configuration apparatus for a multi-wavelength passive optical network system provided by the present application.
  • the wavelength configuration apparatus 600 may include:
  • the receiving module 610 is configured to scan a downlink receiving wavelength, and receive downlink wavelength information of the downlink wavelength channel respectively broadcast by the OLT through each downlink wavelength channel of the multi-wavelength PON system during the downlink receiving wavelength scanning process;
  • the wavelength mapping table establishing module 620 is configured to establish a downlink receiving wavelength mapping table according to the downlink wavelength information, where the entries of the downlink receiving wavelength mapping table include downlink receiving wavelength information, downlink optical receiver driving current information, and ONU receiving optical physics. Parameter
  • the wavelength configuration module 630 is configured to select one downlink wavelength in the downlink wavelength information broadcasted by the OLT, and use the downlink optical receiver driving current information recorded according to the related entry in the downlink receiving wavelength mapping table to The operating wavelength of the receiver is set to the selected downstream wavelength.
  • the wavelength mapping table establishing module 620 may include:
  • a peak searching unit 621 configured to detect from the downlink receiving wavelength scanning process
  • the ONU receives the photocurrent (or the ONU receiving optical power or RSSI) and searches for the peak value of the received optical current of the ONU (or the peak value of the received optical power of the ONU or the RSSI peak);
  • An entry establishing module 622 configured to record, when the peak search unit searches for the peak value of the received optical current (or the peak value of the received optical power or the RSSI peak of the ONU), the driving current of the current downlink optical receiver and the ONU receiving
  • the downlink wavelength information of the downlink wavelength channel corresponding to the peak of the optical current (or the peak of the received optical power or the RSSI peak of the ONU), and the downlink receiving wavelength mapping entry is established according to the above three parameters.
  • the wavelength configuration apparatus 600 may further include: a sending module 640, configured to scan an uplink sending wavelength, and send a registration request to the OLT in a registration authorized time slot allocated by the OLT;
  • the control module 650 is configured to determine whether the receiving module receives the ONU identity allocation message sent by the OLT, and if not, control the sending module to send the next registration authorization time slot allocated by the OLT to the OLT again. Registering the request until the receiving module successfully receives the ONU identity assignment message.
  • the sending module 640 can include:
  • the driving current adjustment unit 641 is configured to select a boundary value as the initial current value in the range of the driving current supported by the upstream optical transmitter, and adjust the driving current of the upstream optical transmitter to increase or decrease by using the preset variation. ;
  • the sending unit 642 is configured to send, to the OLT, an uplink sending wavelength corresponding to a driving current value adjusted by the current uplink optical transmitter, within a registration authorized time slot provided by the OLT to the ONU. ONU registration request.
  • the wavelength configurating device 600 may further include:
  • the wavelength calibration module 660 is configured to detect, according to the downlink receiving wavelength mapping table, whether a downlink receiving wavelength of the downlink optical receiver drifts, and calibrate the downlink receiving wavelength when a drift occurs.
  • the receiving module 610 is further configured to receive the sending by the OLT. And transmitting, by the sending module 640, the uplink transmission wavelength of the upstream optical transmitter according to the uplink wavelength adjustment command, for the OLT to perform optical current (or OLT) Receive optical power or RSSI) detects and establishes an uplink receive wavelength mapping table.
  • the receiving module 610 is further configured to receive uplink receiving wavelength information that is sent by the OLT after the uplink receiving wavelength mapping table is established; and the wavelength mapping table establishing module 620 is further configured to be used according to the The uplink receiving wavelength information is used to establish an uplink transmitting wavelength mapping table, where the uplink transmitting wavelength mapping table includes uplink transmitting wavelength information and uplink optical transmitter driving current information.
  • the receiving module 610 is further configured to: receive, after receiving the downlink wavelength information that is broadcast by the OLT, the uplink wavelength information that is respectively used by the OLT to be registered by the OLT through the respective downlink wavelength channels;
  • the wavelength configuration module 620 is further configured to query, according to the uplink wavelength information that is available for registration by the ONU, the uplink optical transmitter driving current information recorded by the related entry of the uplink transmission wavelength mapping table, and according to the driving current. The information sets the uplink transmission wavelength of the upstream optical transmitter.
  • each of the above modules is mainly divided into specific functions at the time of wavelength configuration.
  • the receiving module 610 can be implemented by the downlink optical receiver 122 and the related driving module
  • the sending module 640 can be implemented by the uplink optical transmitter 123 and an associated driving module, where the wavelength mapping is performed.
  • the table establishing module 620, the wavelength configuration module 630, the control module 650, and the wavelength calibration module 660 can be implemented by the MAC module of the ONU 120.
  • the various functional modules of the wavelength configuration device 600 can also be implemented by other hardware entities.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computing Systems (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)
  • Small-Scale Networks (AREA)

Abstract

本申请提供一种多波长无源光网络的波长配置方法，包括：ONU扫描下行接收波长，并在所述下行接收波长扫描过程中接收OLT通过多波长PON系统的各个下行波长通道分别广播的所述下行波长通道的下行波长信息；所述ONU根据所述下行波长信息建立下行接收波长映射表，所述下行接收波长映射表的表项包括下行接收波长信息、下行光接收机驱动电流信息和ONU接收光物理参数信息；所述ONU在所述OLT广播的下行波长信息中选择一个下行波长，并根据所述下行接收波长映射表中相关表项记录的下行光接收机驱动电流信息，将所述下行光接收机的工作波长设置为选择的下行波长。本申请还提供一种多波长无源光网络系统及其波长配置装置。

Description

多波长无源光网络的波长配置方法、 系统和装置
'技术领域
本申请主要涉及光通信技术， 特别地， 涉及一种多波长无源光网络
(Passive Optical Network, PON)的波长配置方法、 系统和装置。 '背景技术
无源光网络 (PON)技术是目前一种主要的宽带接入技术。 传统的 PON 系统是一种基于时分复用 (Time Division Multiplexing, TDM)机制的点到多 点网络系统，请参阅图 1， 通常 PON系统包括位于局侧的光线路终端 (Optical Line Terminal, OLT). 位于用户侧的多个光网络单元 (Optical Network Unit, ONU)以及连接在所述 OLT和 ONU之间的光分配网络 (Optical Distributing Network, ODN)。其中，所述 ODN用于分发或复用 OLT和 ONU之间的数据信 号， 以使所述多个 ONU可以共享光传输通道。 在上述基于 TDM机制的 PON 系统中， 从 OLT到 ONU的方向称为下行， 由 OLT按照 TDM方式将下行数据 流广播到所有 ONU, 各个 ONU只接收带有自身标识的数据； 从 ONU到 OLT 的方向为上行， 由于各个 ONU共享光传输通道， 为了保证各个 ONU的上行 数据不发生冲突， 所述 PON系统在上行方向采用时分多址 (Time Division Multiple Access, TDMA)方式， 即由 OLT为每个 ONU分配时隙， 各个 ONU严 格按照所述 OLT分配的时隙发送上行数据。
不过， 上述 PON系统受 TDM机制的时分特性的影响， 用户的可用带 宽通常会受到限制， 且另一方面又无法有效利用光纤自身的可用带宽， 因 此无法满足不断出现的宽带网络应用业务的需求。 为解决上述问题， 同时 考虑兼容现有的 PON系统， 业界提出了融合波分复用 (Wavelength Division Multiplexing, WDM)技术和 TDM技术的混合 PON系统， 在所述混合 PON 中， 局端 OLT与用户侧 ONU之间采用多个波长通道进行数据收发， 即所 述混合 PON系统是一种多波长 PON系统。 在所述多波长 PON系统中，所述 OLT支持同时以多个波长通道进行数 据发送和接收， 每个 ONU分别工作在其中一个波长通道， 在下行方向， 所 述 OLT采用每一个波长通道分别对应的下行波长将下行数据广播给工作在 所述波长通道的多个 ONU; 而在上行方向， 每一个波长通道的 ONU可以 在所述 OLT分配的时隙中采用该波长通道的上行波长向所述 OLT发送上行 数据。 为了降低仓储成本， 通常所述 ONU采用波长可调光收发组件， 因此 在初始化时需要所述 ONU首先进行工作波长配置。 不过， 如果所述 ONU 所配置的下行接收波长或者上行发射波长并不被所述 OLT 支持， 则所述 ONU无法正常注册。 '发明内容
本申请提供一种可以有效保证 ONU正常注册的多波长无源光网络 的波长配置方法。 并且， 基于所述波长切换方法， 本申请还提供一种多 波长无源光网络系统和装置。
一种多波长无源光网络的波长配置方法， 包括： ONU扫描下行接收 波长， 并在所述下行接收波长扫描过程中接收 OLT通过多波长无源光网络 系统的各个下行波长通道分别广播的所述下行波长通道的下行波长信息； 所述 ONU根据所述下行波长信息建立下行接收波长映射表，所述下行接收 波长映射表的表项包括下行接收波长信息、 下行光接收机驱动电流信息和 ONU接收光物理参数； 所述 ONU在所述 OLT广播的下行波长信息中选择 一个下行波长， 并根据所述下行接收波长映射表中相关表项记录的下行光 接收机驱动电流信息， 将所述下行光接收机的工作波长设置为选择的下行 波长。
一种多波长无源光网络的波长配置装置， 包括： 接收模块， 用于扫 描下行接收波长， 并在所述下行接收波长扫描过程中接收 OLT通过多波长 无源光网络系统的各个下行波长通道分别广播的所述下行波长通道的下行 波长信息； 波长映射表建立模块， 用于根据所述下行波长信息建立下行接 收波长映射表， 所述下行接收波长映射表的表项包括下行接收波长信息、 下行光接收机驱动电流信息和 ONU接收光物理参数； 波长配置模块， 用于 在所述 OLT广播的下行波长信息中选择一个下行波长， 并根据所述下行接 收波长映射表中相关表项记录的下行光接收机驱动电流信息， 将所述下行 光接收机的工作波长设置为选择的下行波长。
一种多波长无源光网络系统， 包括： 至少一个 OLT和多个 ONU, 所 述至少一个 OLT通过光分配网络以点到多点的方式连接到所述多个 ONU, 其中， 所述 ONU包括如上所述的多波长无源光网络的波长配置装置。
在本申请提供的多波长 PON的波长切换方法、 系统和装置中， ONU 在初始化过程中进行波长扫描并与 OLT进行交互， 建立相应的波长映射表， 从而保证所述 ONU配置的收发波长在所述 OLT支持的波长范围之内， 实现 ONU收发波长的正常初始化。
-附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对 实施例中所需要使用的附图作简单地介绍， 显而易见地， 下面描述中的附 图仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出 创造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1是一种基于时分复用机制的无源光网络系统的网络架构示意图。 图 2是本申请提供的多波长无源光网络系统一种实施例的网络架构示 意图。
图 3是本申请提供的多波长无源光网络的波长切换方法第一种实施例 的流程图。
图 4是图 3所示的多波长无源光网络的波长切换方法中采用 XGTC帧承 载波长信息的示意图。
图 5是图 3所示的多波长无源光网络的波长切换方法中采用 PLOAM消 息承载波长信息的示意图。 图 6是本申请提供的多波长无源光网络的波长切换装置一种实施例的 结构示意图。
•具体实舫式
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进 行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没 有做出创造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的 范围。
请参阅图 2， 本申请一种实施例提供的多波长无源光网络系统的网络架 构示意图。所述多波长 PON系统 100包括至少一个光线路终端 (OLT) 110、多 个光网络单元 (ONU)120和一个光分配网络 (ODN)130， 其中， 所述 OLT 110 通过所述 ODN 130以点到多点的方式连接到所述多个 ONU 120，其中所述多 个 ONU 120共享所述 ODN 130的光传输介质。所述 ODN 130可以包括主干光 纤 131、 光分路模块 132和多个分支光纤 133， 其中所述光分路模块 132可以 设置在远端节点 (Remote Node, RN)， 其一方面通过所述主干光纤 131连接到 所述 OLT 110， 另一方面通过所述多个分支光纤 133分别连接至所述多个 ONU 120。
在所述多波长 PON系统 100中， 所述 OLT 110和所述多个 ONU 120之间 的通信链路可以包括多个上行波长通道和多个下行波长通道。 在下行方向， 所述多个下行波长通道同样通过波分复用 (WDM)方式共享所述 ODN的光传 输介质， 且每个 ONU 120可以工作在所述多波长 PON系统 100的其中一个下 行波长通道， 每个下行波长通道可以承载一个或多个 ONU 120的下行业务； 并且，工作在同一个下行波长通道的 ONU 120可以通过时分多址 (TDM)方式 共享所述下行波长通道。 在上行方向， 所述多个上行波长通道通过 WDM方 式共享所述 ODN 130的光传输介质，且每个 ONU 120可以工作在所述多波长 PON系统 100的其中一个上行波长通道， 每个上行波长通道可以承载一个或 多个 ONU 120的上行业务； 并且， 工作在同一个上行波长通道的 ONU 120 可以通过时分多址 (TDMA)方式共享所述上行波长通道。
在本实施例中， 如图 2所示， 以所述多波长 PON系统 100具有四个上行 波长通道和下行波长通道为例进行介绍， 应当理解， 在实际应用时， 所述 多波长 PON系统 100的上下行波长通道的数量还可以根据网络需要而定。 为 便于描述， 在本实施例中将所述多波长 PON系统 100的四个上行波长通道分 别命名为上行波长通道 1(采用第一上行波长 λιι1)、 上行波长通道 2(采用第二 上行波长 λιι2)、 上行波长通道 3(采用第三上行波长 λιι3)和上行波长通道 4(采 用第四上行波长 λιι4)，将其四个下行波长通道分别命名为下行波长通道 1(采 用第一下行波长 λ(11)、 下行波长通道 2(采用第二下行波长 λ(12)、 下行波长通 道 3(采用第三下行波长 λ(13)和下行波长通道 4(采用第四下行波长 λ(14)。
每个上行波长通道和下行波长通道可以分别具有对应的波长通道标识 (比如， 通道号)， 也即是说， 所述上行波长通道标识与其标识的上行波长通 道的上行波长具有匹配关系，所述 OLT 110和所述 ONU 120可以根据所述上 行波长通道标识获悉所述上行波长通道的上行波长； 相类似地， 所述下行 波长通道标识与其标识的下行波长通道的下行波长同样具有匹配关系， 所 述 OLT 110和所述 ONU 120可以根据所述下行波长通道标识获悉所述下行 波长通道的下行波长。
在一种实施例中， 请参阅图 2， 所述 OLT 110可以包括光耦合器 111、 第 一波分复用器 112、 第二波分复用器 113、 多个下行光发射器 Txl~Tx4、 多个 上行光接收器 Rxl~Rx4和处理模块 114。 其中， 所述多个下行光发射器 Txl~Tx4通过所述第一波分复用器 112连接到所述光耦合器 111，所述多个上 行光接收器 Rxl~Rx4通过所述第二波分复用器 113连接到所述光耦合器 111， 所述耦合器 111进一步连接到所述 ODN 130的主干光纤 131。
所述多个下行光发射器 Txl~Tx4的发射波长各不相同，其中，每一个下 行光发射器 Txl~Tx4可以分别对应所述多波长 ΡΟΝ系统 100的其中一个下行 波长通道， 比如所述多个下行光发射器 Txl~Tx4的发射波长可以分别 λ(11~λ(14。所述下行光发射器 Txl~Tx4可以分别利用其发射波长 λ(11~λ(14将下 行数据发射到对应的下行波长通道， 以便被工作在所述下行波长通道的 ONU 120所接收。相对应地，所述多个上行光接收器 Rxl~Rx4的接收波长可 以各不相同，其中每一个上行光接收器 Rxl~Rx4同样分别对应所述多波长无 源光网络系统 100的其中一个上行波长通道， 比如， 所述多个上行光接收器 Rxl~Rx4的发射波长可以分别 λιι1~λιι4。 所述上行光接收器 Rxl~Rx4可以分 别利用其接收波长 λιι1~λιι4接收工作在对应上行波长通道的 ONU 120发送 的上行数据。
所述第一波分复用器 112用于将所述多个下行光发射器 Txl~Tx4发射的 波长分别为 λ(11~λ(14的下行数据进行波分复用处理， 并通过所述光耦合器 111发送到所述 ODN 130的主干光纤 131，以通过所述 ODN 130将所述下行数 据提供给所述 ONU 120。 并且， 所述光耦合器 111还可以用于将来自所述多 个 ONU 120且波长分别为 λΐ!ΐ~λΐ!4的上行数据提供给所述第二波分复用器 113， 所述第二波分复用器 113可以将所述波长分别为 λΐ!ΐ~λΐ!4的上行数据解 复用到所述上行光接收器 Rxl~Rx4进行数据接收。
所述处理模块 114可以为媒介接入控制 (Media Access Control, MAC)模 块， 其一方面可以根据某个 ONU 120工作的下行波长通道， 将待发送给所 述 ONU 120的下行数据提供给与所述下行波长通道相对应的下行光发射 器， 以便所述下行光发射器将所述下行数据发射到所述波长通道， 另一方 面， 所述处理模块 114还可以对各个上行光接收器 Rxl~Rx4接收到的上行数 据进行处理。
所述 ONU 120的工作波长 (包括上行发射波长和下行接收波长)是可调 的， 在具体实施例中， 所述 ONU 120可以包括光耦合器 121、 下行光接收器 122、 上行光发射器 123和处理模块 124。 其中， 所述下行光接收器 122和所 述上行光发射器 123均为波长可调器件， 二者可以通过所述光耦合器 121连 接到所述 ONU 120对应的分支光纤。 所述光耦合器 121可以一方面将所述上 行光发射器 123发送的上行数据提供到所述 ODN 130的分支光纤 133， 以通 过所述 ODN 130发送给所述 OLT 110； 另一方面， 所述光耦合器 121还可以 将所述 OLT 110通过所述 ODN 130发送的下行数据提供给所述下行光接收 器 122进行数据接收。
所述处理模块 124可以是 MAC模块，其一方面可以根据需要控制所述下 行光接收器 122和所述上行光发射器 123进行波长调整， 另一方面可以在指 定时隙将待发送给所述 OLT 110的上行数据提供给所述上行光发射器 123， 以通过所述上行光发射器 123通过相应的上行波长通道发送给所述 OLT 110， 并对所述下行光接收器 122接收到的下行数据进行处理。
在所述多波长 PON系统中，由于所述 OLT 110支持多个上下行波长通道 且所述 ONU 120的工作波长可调， 为实现正常注册，所述 ONU 120在初始化 时首先需要根据所述 OLT 110所支持的波长能力，进行下行接收波长和上行 发射波长的配置。 本发明实施例提供一种多波长 PON系统的波长配置方法， 可以保证 ONU的工作波长正确初始化。 图 3为本申请一种实施例提供的多波长无源光网络的波长配置方法的 流程图。 所述波长配置方法可以包括：
步骤 S10， OLT在多波长 PON系统的各个下行波长通道分别周期性广播 所述下行波长通道的下行波长信息和可供 ONU注册使用的上行波长信息。
一方面， 局端 OLT的 MAC模块可以将各个下行波长通道的下行波长信 息分别提供给相对应的下行光发射器 Txl~Tx4， 并控制所述下行光发射器 Txl~Tx4通过各个下行波长通道周期性地向用户侧的 ONU广播所述下行波 长信息。 由于各个下行波长通道分别对应特定的下行波长， 因此， 在一种 实施例中， 所述 OLT在各个波长通道广播的下行波长信息可以分别是所述 下行波长通道的通道标识信息， 比如下行波长通道号等。 另一方面， 所述 0LT的 MAC模块还可以结合各个上行波长通道实际上 线的 0NU数量， 并根据波长通道 0NU数量均衡算法， 获得可供 ONU注册使 用的上行波长信息， 即可用上行波长信息； 并且， 所述 MAC模块可以将所 述上行波长信息提供给所述下行光发射器 Txl~Tx4，以供所述下行光发射器 Txl~Tx4通过各个下行波长通道广播所述下行波长信息的同时实现所述可 用上行波长信息的广播。
在一种实施例中， 所述下行波长信息和上行波长信息可以通过 XGPON 传输汇聚 (XGPON Transmission Conversion, XGTC)帧、 GPON传输汇聚 (GPON Transmission Conversion, GTC)帧或者带逻辑链路标识 (Logic Link Identifier, LLID)的以太网帧 (g卩 EPON帧)来承载。
以采用 XGTC帧来承载所述下行波长信息和上行波长信息为例，请参阅 图 4， 所述 XGTC帧包括 XGTC帧头和 XGTC净荷， 其中 XGTC帧头包括光网 络单元标识（ONU-ID)字段、 指示（Ind)字段、 混合纠错（Hybrid Error Correction, HEC)字段和上行物理层操作管理和维护（Physical Layer Operations, Administration and Maintenance upstream, PLOAMu)字段， 其中， 所述下行波长信息和上行波长信息可以通过所述 Ind字段进行承载。 比如， 现有 XGPON标准定义的 XGTC帧头的 Ind字段预留有 9个比特的保留 (Reserve)域，在本实施例中，所述下行波长信息和上行波长信息可以利用在 XGTC帧头的 Ind字段的保留域进行承载， 如图 4所示。
在另一种实施例中， 所述下行波长信息和上行波长信息可以通过物理 层操作管理禾口维护 (Physical Layer Operations, Administration and Maintenance, PLOAM)消息、 光网络终端管理和控制接口（ONT Management and Control Interface, OMCI)消息、 多点控制协议（Multi-Point Control Protocol, MPCP)消息或者操作管理和维护（Operation Administration and Maintenance, OAM)消息进行承载， 具体消息格式如字段取值和字段长度可 以根据实际需要而定； 当然， 在其他替代实施例中， 所述 OLT 110也可以通 过新定义的消息来承载所述下行波长切换命令。
以采用 PLOAM消息来承载所述下行波长信息和上行波长信息为例，请 参阅图 5， 其为 PLOAM消息的消息格式示意图， 所述 PLOAM消息通常包括 光网络单元标识 (ONU ID)字段、 消息标识 (Message ID)字段、 序列号 (Sequence No)字段、 数据 (Data)字段和完整性检查 (Integrity Check)字段。 在 本实施例中， 所述下行波长信息和上行波长信息可以承载在所述 PLOAM消 息的数据字段， 比如所述 PLOAM消息可以采用如下表所示格式：
Figure imgf000011_0001
步骤 S20， ONU扫描下行接收波长， 接收下行接收光物理参数， 并建立 下行接收波长映射表， 所述下行接收波长映射表的表项包括下行接收波长 信息、 下行光接收机驱动电流信息和 ONU接收光物理参数。
具体而言， ONU可以在其波长可调的下行光接收机的最大波长接收范 围之内扫描下行接收波长， 比如通过调整所述下行光接收机的驱动电流逐 渐改变下行接收波长， 并在下行接收波长扫描过程中分别接收各个下行波 长通道广播的下行光信号。 并且， 所述可调光接收机可以将其接收到的承 载下行波长信息和上行波长信息的消息（比如 PLOAM消息)或者数据帧 (比 如 XGTC帧)提供给所述 ONU的 MAC模块。
在一种实施例中，所述 ONU接收光物理参数可以是 ONU接收光电流 (即 所述 ONU的下行光接收机的光生电流)的峰值。所述 ONU在下行接收波长扫 描过程中检测 ONU接收光电流， 搜索 ONU接收光电流的峰值。 在搜索到 ONU接收光电流峰值时， 所述 ONU可以记录当前下行光接收机的驱动电流 以及从 MAC模块接收到的消息或者数据帧提取出来当前 ONU所处的下行 波长通道的下行波长信息， 并根据上述三个参数建立下行接收波长映射表 项， 即所述下行接收波长映射表项包括下行接收波长信息、 下行光接收机 驱动电流信息和 ONU接收光电流峰值。
在另一种实施例中， 所述 ONU接收光物理参数也可以是 ONU接收光功 率峰值或者接收信号强度指示 (Received Signal Strength Indication, RSSI)信 息。 所述 ONU在下行接收波长扫描过程中检测 ONU接收光功率或者 RSSI, 搜索测 ONU接收光功率或者 RSSI的峰值。 在搜索到 ONU接收光功率或者 RSSI峰值时， 所述 ONU可以记录当前下行光接收机的驱动电流以及从 MAC 模块接收到的消息或者数据帧提取出来当前 ONU所处的下行波长通道的下 行波长信息， 并根据上述三个参数建立下行接收波长映射表项， 即所述下 行接收波长映射表项包括下行接收波长信息、 下行光接收机驱动电流信息、 以及 ONU接收光功率或 RSSI峰值。 当然， 应当理解， 在其他替代实施例中， 所述 ONU接收光物理参数还可以是与所述 ONU接收光相关的其他物理参 数， 相对应地， 所述 ONU在下行接收波长扫描过程中检测该物理参数， 并 根据检测到的物理参数建立所述下行接收波长映射表项。
通过重复上述过程， 所述 ONU的下行接收波长扫描可以遍历所述下行 光接收机支持的所有下行接收波长或者所述下行光接收机整个下行波长接 收范围， 并建立起一个或者多个下行接收波长映射表项。 在完成上述下行 接收波长扫描之后， 所述 ONU便可以建立起包括一个或者多个表项的下行 接收波长映射表， 其中每个表项分别对应不同的下行接收波长。
步骤 S30,所述 ONU选择一个下行接收波长， 并根据所述下行接收波长 映射表中相关表项记录的下行光接收机驱动电流信息， 将其下行光接收机 的工作波长设置为选择的下行接收波长。
比如， 所述 ONU在建立所述下行接收波长映射表之后， 可以按照预设 波长配置要求或者随机地选择一个下行接收波长， 并查找所述下行接收波 长映射表， 从与所述选择的下行接收波长相对应的表项中获得下行光接收 机驱动电流信息， 并根据所述下行光接收机驱动电流信息， 调整所述下行 光接收机的驱动电流， 从而将所述下行光接收机的下行接收波长设置为上 述选择的下行接收波长。
步骤 S40, 所述 ONU扫描上行发送波长， 并在所述 OLT提供的注册授权 时隙向所述 OLT上报注册请求。
在一种实施例中， 该步骤的启动条件可以设置为： 所述 ONU可以正确 收到所述 OLT通过下行广播的注册授权信息， 但尚未正常注册。 该步骤的 结束条件可以设置为：所述 ONU成功注册；或者，所述 ONU接收到所述 OLT 下发的停止上行发送波长调整指令。
具体而言， 由于所述 ONU在初始化时通常并不知道其可调上行光发射 机当前的上行发送波长， 也不确定通过当前的上行发送波长发送的上行光 信号是否可以被所述 OLT正常接收， 因此， 在本实施例中， 所述 ONU可以 通过在其上行光发射机支持的驱动电流的取值范围之内逐渐改变所述驱动 电流， 进行上行发送波长扫描。 比如， 在初始化时， 所述 ONU可以选择所 述驱动电流的取值范围的一个边界值作为初始电流值， 并在所述初始电流 值基础上以预设的变化量进行递增或递减， 直到所述驱动电流值到达所述 取值范围的另一个边界值。 在此过程中， 所述上行光发射机的上行发送波 长随着驱动电流的递增或递减相应地发生逐渐调整， 从而实现所述上行光 发射机的上行发送波长扫描。 在所述驱动电流值到达所述取值范围的另一 个边界值之后， 如果当前并不满足上述结束条件， 所述 ONU可以将所述上 行光发射机的驱动电流重新调整为原来边界值 (即初始电流值)，重新继续上 行发送波长扫描。
在所述上行发送波长扫描过程中， 所述 ONU的下行光接收机可以通过 上述选择的下行接收波长接收到所述 OLT通过相应的下行波长通道广播的 注册授权信息， 因此， 所述 ONU可以通知其上行光发射机可以在所述 OLT 提供给所述 ONU的注册授权时隙之内， 根据当前所述上行光发射机调整到 的驱动电流值所对应的上行发送波长， 向所述 OLT上发 ONU注册请求。 在上发 ONU注册请求之后，所述 ONU的 MAC模块可以进一步判断在预 设时间段之间是否接收到所述 OLT反馈的 ONU标识 (ONU ID)分配消息， 如 果在预设时间段时间无法接收到所述 ONU ID分配消息，所述 MAC模块可以 认为 OLT不支持当前所述上行光发射机的上行发送波长 (即采用所述上行发 送波长时所述 ONU无法正常注册)， 于是便可按照上述扫描规则继续调整所 述上行光发射机的驱动电流， 控制所述上行光发射器维持上述上行发送波 长扫描， 并在所述 OLT分配的下一个注册授权时隙重新向所述 OLT发送 ONU注册请求， 直至成功接收到所述 OLT发送的 ONU ID分配消息 (即所述 ONU成功注册)。
步骤 S50, 所述 OLT向所述 ONU下发上行发送波长调整指令， 并在所述 ONU的上行发送波长调整过程中检测 OLT接收光物理参数， 建立上行接收 波长映射表，所述上行接收波长映射表的表项包括上行接收波长信息、 OLT 接收光物理参数和 ONU序列号信息。
在具体实施例中， 所述 OLT接收光物理参数可以是 OLT接收光电流峰 值、 OLT接收光功率峰值或者 RSSI峰值。 以 OLT接收光电流峰值为例， 在 所述 ONU注册过程中， 所述 OLT可以检测所述 ONU发送的上行光信号所对 应的 OLT接收光电流 (即所述 OLT的上行光接收机的光生电流)， 并记录所述 OLT接收光电流， 并且， 在所述 ONU完成注册之后， 所述 OLT可以对所述 ONU在波长通道的注册次数进行累加。 另一方面， 所述 OLT可以通过向所 述 ONU下发上行发送波长调整指令，指示所述 ONU按照上述步骤 S40的上行 发送波长扫描规则进行上行发送波长微调， 所述 ONU可以通过逐步调整所 述上行光发射机的驱动电流， 来实现上行发送波长微调， 直至接收到所述 OLT下发的停止上行发送波长调整指令。
所述 OLT可以在所述 ONU的上行发送波长微调过程中， 对所述 ONU通 过相应上行波长通道发送的上行光信号进行光生电流检测， 从而获取并记 录 OLT接收光电流值。 进一步地， 所述 0LT的 MAC模块可以在其记录到的 一系列 0LT接收光电流值搜索到 0LT接收光电流峰值，并根据所述 0LT接收 光电流峰值以及该峰值所对应的上行波长信息， 建立上行接收波长映射表 项。 其中， 所述上行接收波长映射表项可以包括上行接收波长信息、 OLT 接收光电流峰值信息和 ONU序列号信息。 其中， 所述上行接收波长信息可 以是所述 OLT检测到所述光电流峰值时承载所述上行光信号的上行波长通 道的通道标识信息 (比如波长通道号)或者所述波长通道的上行波长信息。当 然，
应当理解， 在其他替代实施例中， 如果所述 OLT接收光物理参数采用 OLT接收光功率或 RSSI峰值或者其他物理参数， 所述 OLT在所述 ONU的上 行发送波长微调过程中将进行相关物理参数检测， 且其相应建立上行接收 波长映射表项中的 OLT接收光电流峰值信息将被替换为所述 OLT接收光功 率或 RSSI峰值或者其他物理参数。
通过重复上述过程， 所述 ONU的上行发送波长扫描可以遍历所述上行 光发射机支持的所有上行发射波长或者所述上行光发射机整个上行波长发 射范围， 由此， 所述 OLT可建立起一个或者多个上行接收波长映射表项。 在完成上述上行发送波长扫描之后， 所述 OLT便可以建立起包括一个或者 多个表项的上行接收波长映射表， 其中每个表项分别对应不同的上行接收 波长。
步骤 S60, 所述 OLT将所述上行接收波长信息发送给所述 ONU, 所述 ONU根据所述上行接收波长信息建立上行发送波长映射表， 所述上行发送 波长映射表的表项包括上行发送波长信息和上行光发射机驱动电流信息。
比如， 当所述 OLT发现所述 ONU在同一个上行波长通道进行第二次注 册时， 所述 OLT的 MAC模块可以将当前检测到的 OLT接收光电流值与记录 的 OLT接收光电流峰值进行比较， 判断二者之间的偏差是否小于预设阈值， 如果小于阈值， 则可以认为所述 ONU当前上行发送波长与所述 OLT当前上 行接收波长对准，所述 OLT便可以将所述 OLT接收光电流峰值所对应的上行 波长通道的上行波长信息发送给所述 ONU。 所述 ONU在接收到所述上行波 长信息之后， 便可以建立相应的上行发送波长映射表， 所述上行发送波长 映射表的表项可以包括上行发送波长信息 (即所述 OLT提供的上行波长信 息)以及所述 ONU的上行光发射机驱动电流信息。
当所述 OLT发现所述 ONU在同一个波长通道进行第三次注册时， 所述 OLT可以认为所述 ONU已经完成上行发送波长映射表的建立， 此时， 所述 OLT可以向所述 ONU发送停止上行发送波长扫描指令， 以指示所述 ONU停 止上述上行发送波长扫描， 并且， 所述 OLT还可以进一步将所述 ONU在所 述上行波长通道的注册次数清零。
步骤 S70, 所述 ONU根据所述 OLT下行广播的可供 ONU注册使用的上 行波长信息， 查询所述上行发送波长映射表的相关表项记录的上行光发射 机驱动电流信息， 并根据所述驱动电流信息对所述上行光发射机的上行发 送波长进行设置。
在所述 ONU收到所述 OLT下发的停止上行发送波长扫描指令之后， 其 可以根据所述 MAC模块解析出的可供 ONU注册使用的上行波长信息， 查询 其建立的上行发送波长映射表的相关表项， 获取与所述 OLT提供的可供 ONU注册使用的上行波长信息相对应的表项记录的上行光发射机驱动电流 信息， 并根据所述驱动电流信息设置所述上行光发射机的驱动电流， 从而 将所述上行光发射机的上行发送波长设置为所述 MAC模块解析到的可供 ONU注册使用的上行波长。
可选地， 在具体实施例中， 所述多波长无源光网络的波长配置方法还 可以进一步包括：
步骤 S80,所述 ONU根据所述下行接收波长映射表，检测其下行光接收 机的下行接收波长是否发生漂移， 并在发生漂移时对所述下行接收波长进 行校准。 具体而言， 在正常通信过程中，所述 ONU可以对 ONU接收光电流 (或者 ONU接收光功率或 RSSI)进行监控， 并将监控到的 ONU接收光电流值 (或者 ONU接收光功率值或 RSSI值)与所述下行接收波长映射表的相关表项中记 录的 ONU接收光电流峰值 (或者 ONU接收光功率峰值或 RSSI峰值)进行比 较， 如果二者之间的偏差超过预设阈值， 则认为所述 ONU的下行光接收机 的下行接收波长发生漂移。 此时， 所述 ONU可以任意选取一个方向调整所 述下行光接收机的下行接收波长， 并在调整过程中继续测量 ONU接收光电 流 (或者 ONU接收光功率值或 RSSI值)， 如果测量到的 ONU接收光电流值 (或 者 ONU接收光功率值或 RSSI值)出现减小， 则往相反方向调整所述下行接收 波长， 直至测量到的 ONU接收光电流值 (或者 ONU接收光功率值或 RSSI值) 与所述 ONU接收光电流峰值 (或者 ONU接收光功率峰值或 RSSI峰值)之间的 偏差小于所述预设阈值为止。
步骤 S90, 所述 OLT根据所述上行接收波长映射表， 监控所述 ONU的上 行发射波长是否发生漂移， 并在发生漂移时指令所述 ONU对所述上行发射 波长进行校准。
具体而言， 在正常通信过程中， 所述 OLT可以对 OLT接收光电流 (或者 OLT接收光功率或 RSSI)进行监控， 并将监控到的 OLT接收光电流值 (或者 OLT接收光功率值或 RSSI值)与所述上行接收波长映射表的相关表项中记录 的 OLT接收光电流峰值 (或者 OLT接收光功率峰值或 RSSI峰值)进行比较，如 果二者之间的偏差超过预设阈值， 则认为所述 ONU的上行光发射机的上行 发射波长发生漂移。 此时， 所述 OLT可以向所述 ONU下发波长调整指令， 指示所述 ONU任意选取一个方向调整所述上行光发射机的上行发送波长， 且所述 OLT在所述 ONU的上行发送波长调整过程中继续测量 OLT接收光电 流 (或者 OLT接收光功率值或 RSSI值)， 如果测量到的 OLT接收光电流值 (或 者 OLT接收光功率值或 RSSI值)出现减小， 则重新向所述 ONU下发波长调整 指令，指示所述 ONU往相反方向调整所述上行发送波长，直至测量到的 OLT 接收光电流值 (或者 OLT接收光功率值或 RSSI值)与所述 OLT接收光电流峰 值 (或者 OLT接收光功率峰值或 RSSI峰值)之间的偏差小于所述预设阈值为 止。
在本申请实施例提供的多波长无源光网络的波长配置方法中， ONU在 初始化过程中进行波长扫描并与 OLT进行交互， 建立相应的波长映射表， 从而保证所述 ONU配置的收发波长在所述 OLT支持的波长范围之内， 实现 ONU收发波长的正常初始化； 另一方面， 基于所述波长映射表， 在正常通 信过程中可以实时监控所述 ONU的收发波长是否发生漂移， 并在发生漂移 时进行自动调整， 从而保证信号接收质量， 降低误码率。 基于上述实施例提供的多波长无源光网络系统的波长切换配置， 本申 请还进一步提供一种波长切换装置， 所述波长切换装置可以应用到在图 2所 示的多波长无源光网络系统 100的 ONU 120。 请参阅图 6， 其为本申请提供 的多波长无源光网络系统的波长配置装置一种实施例的结构示意图， 所述 波长配置装置 600可以包括：
接收模块 610， 用于扫描下行接收波长， 并在所述下行接收波长扫描过 程中接收 OLT通过多波长 PON系统的各个下行波长通道分别广播的所述下 行波长通道的下行波长信息；
波长映射表建立模块 620，用于根据所述下行波长信息建立下行接收波 长映射表， 所述下行接收波长映射表的表项包括下行接收波长信息、 下行 光接收机驱动电流信息和 ONU接收光物理参数；
波长配置模块 630， 用于在所述 OLT广播的下行波长信息中选择一个 下行波长， 并根据所述下行接收波长映射表中相关表项记录的下行光接收 机驱动电流信息， 将所述下行光接收机的工作波长设置为选择的下行波长。
在具体实施例中， 所述波长映射表建立模块 620可以包括：
峰值搜索单元 621， 用于在所述下行接收波长扫描过程中从检测到的 ONU接收光电流 (或者 ONU接收光功率或 RSSI)搜索 ONU接收光电流峰值 (或者 ONU接收光功率峰值或 RSSI峰值)；
表项建立模块 622， 用于在所述峰值搜索单元搜索到所述 ONU接收光 电流峰值 (或者 ONU接收光功率峰值或 RSSI峰值)时， 记录当前下行光接 收机的驱动电流以及所述 ONU接收光电流峰值 (或者 ONU接收光功率峰值 或 RSSI峰值)所对应的下行波长通道的下行波长信息， 并根据上述三个参 数建立下行接收波长映射表项。
进一步地， 在一种实施例中， 所述波长配置装置 600还可以包括： 发送模块 640， 用于扫描上行发送波长， 并在所述 OLT分配的注册授 权时隙向所述 OLT发送注册请求；
控制模块 650， 用于判断所述接收模块是否接收到所述 OLT 发送的 ONU标识分配消息， 如果否，控制所述发送模块在所述 OLT分配的下一个 注册授权时隙重新向所述 OLT发送注册请求， 直至所述接收模块成功接收 到所述 ONU标识分配消息。
在具体实施例中， 所述发送模块 640可以包括：
驱动电流调整单元 641，用于选择在上行光发射机支持的驱动电流的取 值范围选择一个边界值作为初始电流值， 以预设变化量调整所述上行光发 射机的驱动电流进行递增或递减；
发送单元 642，用于在所述 OLT提供给所述 ONU的注册授权时隙之内， 根据当前所述上行光发射机调整到的驱动电流值所对应的上行发送波长， 向所述 OLT上发 ONU注册请求。
在一种实施例中， 所述还波长配置装置 600还可以包括：
波长校准模块 660， 用于根据所述下行接收波长映射表，检测其下行光 接收机的下行接收波长是否发生漂移， 并在发生漂移时对所述下行接收波 长进行校准。
在一种实施例中， 所述接收模块 610还可以用于接收所述 OLT发送的 上行发送波长调整指令； 并且， 所述发送模块 640还用于根据所述上行波 长调整指令对所述上行光发射机的上行发送波长进行微调， 以供所述 OLT 进行 OLT接收光电流 (或者 OLT接收光功率或 RSSI)检测并建立上行接收波 长映射表。
进一步地， 所述接收模块 610还用于接收所述 OLT在建立所述上行接 收波长映射表之后下发的上行接收波长信息； 并且， 所述波长映射表建立 模块 620， 还可以用于根据所述上行接收波长信息建立上行发送波长映射 表， 所述上行发送波长映射表包括上行发送波长信息和上行光发射机驱动 电流信息。
进一步地， 所述接收模块 610还可以用于在接收到所述 OLT广播的下 行波长信息的同时接收到所述 OLT通过各个下行波长通道分别广播的可供 ONU注册使用的上行波长信息； 并且， 所述波长配置模块 620还用于根据 所述可供 ONU注册使用的上行波长信息，查询所述上行发送波长映射表的 相关表项记录的上行光发射机驱动电流信息， 并根据所述驱动电流信息对 所述上行光发射机的上行发送波长进行设置。
应当理解， 以上仅是简单概括所述波长配置装置 600各个功能模块的 主要功能， 所述功能模块具体工作过程可以参阅上述实施例所述的波长配 置方法。 并且， 上述各个模块的主要是在波长配置时的具体功能进行划分， 在具体实施例中， 当所述波长切换装置 600应用到在图 2所示的多波长无 源光网络系统 100的 ONU 120时， 所述接收模块 610可以通过所述下行光 接收机 122及相关的驱动模块来实现， 所述发送模块 640可以通过所述上 行光发射器 123及相关的驱动模块来实现， 所述波长映射表建立模块 620、 所述波长配置模块 630、所述控制模块 650和所述波长校准模块 660可以通 过所述 ONU 120的 MAC模块来实现。 当然， 在其他替代实施例中， 所述 波长配置装置 600的各个功能模块还可以通过其他硬件实体来实现。
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 本发明可借助软件加必需的硬件平台的方式来实现， 当然也可以全部通 过硬件来实施。 基于这样的理解， 本发明的技术方案对背景技术做出贡 献的全部或者部分可以以软件产品的形式体现出来， 该计算机软件产品 可以存储在存储介质中， 如 ROM/RAM、 磁碟、 光盘等， 包括若干指令 用以使得一台计算机设备 （可以是个人计算机， 服务器， 或者网络设备 等） 执行本发明各个实施例或者实施例的某些部分所述的方法。
以上所述， 仅为本申请较佳的具体实施方式， 但本申请的保护范围 并不局限于此， 任何熟悉本技术领域的技术人员在本申请披露的技术范 围内， 可轻易想到的变化或替换， 都应涵盖在本申请的保护范围之内。 因此， 本申请的保护范围应该以权利要求的保护范围为准。

Claims

权利要求
1、 一种多波长无源光网络 PON的波长配置方法， 其特征在于， 包括: 光网络单元 ONU扫描下行接收波长，并在所述下行接收波长扫描过程 中接收光线路终端 OLT通过多波长 PON系统的各个下行波长通道分别广播 的所述下行波长通道的下行波长信息；
所述 ONU根据所述下行波长信息建立下行接收波长映射表，所述下行 接收波长映射表的表项包括下行接收波长信息、 下行光接收机驱动电流信 息和 ONU接收光物理参数；
所述 ONU在所述 OLT广播的下行波长信息中选择一个下行波长， 并 根据所述下行接收波长映射表中相关表项记录的下行光接收机驱动电流信 息， 将所述下行光接收机的工作波长设置为选择的下行波长。
2、 如权利要求 1所述的波长配置方法， 其特征在于， 所述 ONU根据 所述下行波长信息建立下行接收波长映射表包括：
所述 ONU在所述下行接收波长扫描过程中检测 ONU接收光电流或者 ONU接收光功率或接收信号强度指示 RSSI, 搜索 ONU接收光电流峰值或 者 ONU接收光功率或 RSSI峰值；
在搜索到所述 ONU接收光电流峰值或者接收光功率或 RSSI峰值时， 所述 ONU记录当前下行光接收机的驱动电流以及所述 ONU接收光电流峰 值或者接收光功率或 RSSI峰值所对应的下行波长通道的下行波长信息，并 根据上述三个参数建立下行接收波长映射表项。
3、 如权利要求 2所述的波长配置方法， 其特征在于， 还包括： 所述 ONU扫描上行发送波长， 并在所述 OLT分配的注册授权时隙向 所述 OLT发送注册请求；
判断是否接收到所述 OLT发送的 ONU标识分配消息， 如果否， 在所 述 OLT分配的下一个注册授权时隙重新向所述 OLT发送注册请求，直至成 功接收到所述 ONU标识分配消息。
4、 如权利要求 3所述的波长配置方法， 其特征在于， 所述 ONU扫描 上行发送波长，并在所述 OLT提供的注册授权时隙向所述 OLT上报注册请 求包括：
所述 ONU选择其上行光发射机支持的驱动电流的取值范围的一个边 界值作为初始电流值， 以预设变化量调整所述上行光发射机的驱动电流进 行递增或递减；
所述 ONU在所述 OLT提供给所述 ONU的注册授权时隙之内，根据当 前所述上行光发射机调整到的驱动电流值所对应的上行发送波长， 向所述 OLT上发 ONU注册请求。
5、 如权利要求 4所述的波长配置方法， 其特征在于， 还包括： 所述 ONU根据所述下行接收波长映射表， 检测其下行光接收机的下行接收波长 是否发生漂移， 并在发生漂移时对所述下行接收波长进行校准。
6、 如权利要求 1所述的波长配置方法， 其特征在于， 还包括： 所述 ONU接收所述 OLT发送的上行发送波长调整指令， 并根据所述 上行波长调整指令对上行光发射机的上行发送波长进行微调， 以供所述 OLT进行 OLT接收光物理参数进行检测并建立上行接收波长映射表， 其中 所述上行接收波长映射表的表项包括上行接收波长信息、ONU序列号信息、 OLT接收光物理参数。
7、 如权利要求 6所述的波长配置方法， 其特征在于， 还包括： 所述 ONU接收所述 OLT在建立所述上行接收波长映射表之后下发的 上行接收波长信息， 并根据所述上行接收波长信息建立上行发送波长映射 表， 所述上行发送波长映射表包括上行发送波长信息和上行光发射机驱动 电流信息。
8、 如权利要求 7所述的波长配置方法， 其特征在于， 所述 ONU在接 收到所述 OLT广播的下行波长信息的同时还接收到所述 OLT通过各个下行 波长通道分别广播的可供 ONU注册使用的上行波长信息。
9、 如权利要求 8所述的波长配置方法， 其特征在于， 还包括： 所述 ONU根据所述可供 ONU注册使用的上行波长信息， 查询所述上 行发送波长映射表的相关表项记录的上行光发射机驱动电流信息， 并根据 所述驱动电流信息对所述上行光发射机的上行发送波长进行设置。
10、如权利要求 6所述的波长配置方法，其特征在于，还包括：所述 OLT 根据所述上行接收波长映射表， 监控所述 ONU的上行发射波长是否发生漂 移， 并在发生漂移时指令所述 ONU对所述上行发射波长进行校准。
11、一种多波长无源光网络 PON的波长配置装置， 其特征在于， 包括： 接收模块， 用于扫描下行接收波长， 并在所述下行接收波长扫描过程 中接收光线路终端 OLT通过多波长 PON系统的各个下行波长通道分别广播 的所述下行波长通道的下行波长信息；
波长映射表建立模块， 用于根据所述下行波长信息建立下行接收波长 映射表， 所述下行接收波长映射表的表项包括下行接收波长信息、 下行光 接收机驱动电流信息和 ONU接收光物理参数；
波长配置模块， 用于在所述 OLT广播的下行波长信息中选择一个下行 波长， 并根据所述下行接收波长映射表中相关表项记录的下行光接收机驱 动电流信息， 将所述下行光接收机的工作波长设置为选择的下行波长。
12、 如权利要求 11所述的波长配置装置， 其特征在于， 所述波长映射 表建立模块包括：
峰值搜索单元，用于在所述下行接收波长扫描过程中，从检测到的 ONU 接收光电流或者 ONU接收光功率或者接收信号强度指示之中， 搜索 ONU 接收光电流峰值或者 ONU接收光功率或 RSSI峰值；
表项建立模块，用于在所述峰值搜索单元搜索到所述 ONU接收光电流 峰值或者 ONU接收光功率或 RSSI峰值时， 记录当前下行光接收机的驱动 电流以及所述 ONU接收光电流峰值或者 ONU接收光功率或 RSSI峰值所 对应的下行波长通道的下行波长信息， 并根据上述三个参数建立下行接收 波长映射表项。
13、 如权利要求 12所述的波长配置装置， 其特征在于， 还包括： 发送模块， 用于扫描上行发送波长， 并在所述 OLT分配的注册授权时 隙向所述 OLT发送注册请求；
控制模块， 用于判断所述接收模块是否接收到所述 OLT发送的 ONU 标识分配消息， 如果否， 控制所述发送模块在所述 OLT分配的下一个注册 授权时隙重新向所述 OLT发送注册请求， 直至所述接收模块成功接收到所 述 ONU标识分配消息。
14、 如权利要求 13所述的波长配置装置， 其特征在于， 所述发送模块 包括：
驱动电流调整单元， 用于选择在上行光发射机支持的驱动电流的取值 范围选择一个边界值作为初始电流值， 以预设变化量调整所述上行光发射 机的驱动电流进行递增或递减；
发送单元， 用于在所述 OLT提供给所述 ONU的注册授权时隙之内， 根据当前所述上行光发射机调整到的驱动电流值所对应的上行发送波长， 向所述 OLT上发 ONU注册请求。
15、 如权利要求 14所述的波长配置装置， 其特征在于， 还包括： 波长校准模块， 用于根据所述下行接收波长映射表， 检测其下行光接 收机的下行接收波长是否发生漂移， 并在发生漂移时对所述下行接收波长 进行校准。
16、 如权利要求 14所述的波长配置装置， 其特征在于，
所述接收模块还用于接收所述 OLT发送的上行发送波长调整指令； 所述发送模块还用于根据所述上行波长调整指令对所述上行光发射机 的上行发送波长进行微调，以供所述 OLT进行 OLT接收光电流检测并建立 上行接收波长映射表。
17、 如权利要求 16所述的波长配置装置， 其特征在于， 所述接收模块还用于接收所述 OLT在建立所述上行接收波长映射表之 后下发的上行接收波长信息；
所述波长映射表建立模块， 还用于根据所述上行接收波长信息建立上 行发送波长映射表， 所述上行发送波长映射表包括上行发送波长信息和上 行光发射机驱动电流信息。
18、 如权利要求 17所述的波长配置装置， 其特征在于，
所述接收模块还用于在接收到所述 OLT广播的下行波长信息的同时接 收到所述 OLT通过各个下行波长通道分别广播的可供 ONU注册使用的上 行波长信息。
19、 如权利要求 18所述的波长配置装置， 其特征在于，
所述波长配置模块还用于根据所述可供 ONU注册使用的上行波长信 息， 查询所述上行发送波长映射表的相关表项记录的上行光发射机驱动电 流信息， 并根据所述驱动电流信息对所述上行光发射机的上行发送波长进 行设置。
20、 一种多波长无源光网络 PON系统， 其特征在于， 包括至少一个光 线路终端 OLT和多个光网络单元 ONU, 所述至少一个 OLT通过光分配网 络以点到多点的方式连接到所述多个 ONU, 其中， 所述 ONU包括如权利 要求 11-19中任一项所述的多波长 PON的波长配置装置。
PCT/CN2012/076848 2012-06-13 2012-06-13 多波长无源光网络的波长配置方法、系统和装置 WO2013185306A1 (zh)

Priority Applications (11)

Application Number Priority Date Filing Date Title
CN201280000516.5A CN103636153B (zh) 2012-06-13 2012-06-13 多波长无源光网络的波长配置方法、系统和装置
KR1020157000712A KR101688445B1 (ko) 2012-06-13 2012-06-13 다중파장 수동 광 네트워크를 위한 파장 구성 방법 및 장치, 및 다중파장 수동 광 네트워크
MX2014015374A MX338111B (es) 2012-06-13 2012-06-13 Metodo y aparato de configuracion de longitud de onda para red optica pasiva de longitud de onda multiple, y sistema de red optica pasiva de losgitiud de onda multiple.
JP2015516400A JP5967744B2 (ja) 2012-06-13 2012-06-13 多重波長受動光ネットワークのための波長構成方法および装置、ならびに多重波長受動光ネットワーク・システム
AU2012382310A AU2012382310B2 (en) 2012-06-13 2012-06-13 Wavelength configuration method and apparatus for multi-wavelength passive optical network, and multi-wavelength passive optical network system
EP12878781.9A EP2863564A4 (en) 2012-06-13 2012-06-13 WAVE LENGTH CONFIGURATION METHOD, SYSTEM AND DEVICE FOR PASSIVE OPTICAL NETWORK WITH MULTIPLE WAVELENGTHS
SG11201408322YA SG11201408322YA (en) 2012-06-13 2012-06-13 Wavelength configuration method and apparatus for multi-wavelength passive optical network, and multi-wavelength passive optical network system
RU2015100260/07A RU2581625C1 (ru) 2012-06-13 2012-06-13 Способ и устройство конфигурирования длины волны для пассивной оптической сети с множеством длин волн и система пассивной оптической сети с множеством длин волн
PCT/CN2012/076848 WO2013185306A1 (zh) 2012-06-13 2012-06-13 多波长无源光网络的波长配置方法、系统和装置
US14/569,682 US9647791B2 (en) 2012-06-13 2014-12-13 Wavelength configuration method and apparatus for multi-wavelength passive optical network, and multi-wavelength passive optical network system
US15/474,890 US20170207876A1 (en) 2012-06-13 2017-03-30 Wavelength configuration method and apparatus for multi-wavelength passive optical network, and multi-wavelength passive optical network system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/076848 WO2013185306A1 (zh) 2012-06-13 2012-06-13 多波长无源光网络的波长配置方法、系统和装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/569,682 Continuation US9647791B2 (en) 2012-06-13 2014-12-13 Wavelength configuration method and apparatus for multi-wavelength passive optical network, and multi-wavelength passive optical network system

Publications (1)

Publication Number Publication Date
WO2013185306A1 true WO2013185306A1 (zh) 2013-12-19

Family

ID=49757423

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/076848 WO2013185306A1 (zh) 2012-06-13 2012-06-13 多波长无源光网络的波长配置方法、系统和装置

Country Status (10)

Country Link
US (2) US9647791B2 (zh)
EP (1) EP2863564A4 (zh)
JP (1) JP5967744B2 (zh)
KR (1) KR101688445B1 (zh)
CN (1) CN103636153B (zh)
AU (1) AU2012382310B2 (zh)
MX (1) MX338111B (zh)
RU (1) RU2581625C1 (zh)
SG (1) SG11201408322YA (zh)
WO (1) WO2013185306A1 (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015164043A1 (en) * 2014-04-21 2015-10-29 Arris Enterprises, Inc. Apparatus and system for managing wavelengths in optical networks
EP3149956A4 (en) * 2014-06-25 2017-07-05 Huawei Technologies Co., Ltd. Optical line terminal (olt) support of optical network unit (onu) calibration
CN107925502A (zh) * 2015-09-07 2018-04-17 华为技术有限公司 一种无源光网络通信的方法、装置及系统
EP3280093A4 (en) * 2015-04-20 2018-10-31 ZTE Corporation Registration method and apparatus
US11362734B2 (en) 2014-04-21 2022-06-14 Arris Enterprises Llc Systems and methods for optical modulation index calibration in a CATV network

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10063411B2 (en) * 2013-02-26 2018-08-28 Zte Corporation Channel map for optical network unit activation and rogue behavior prevention
WO2014183505A1 (en) * 2013-05-15 2014-11-20 Zte Corporation Optical network unit self-calibration in multi-wavelength passive optical network
WO2015100658A1 (zh) * 2013-12-31 2015-07-09 华为技术有限公司 一种光发射器及发射方法、光接收器及接收方法
KR101885372B1 (ko) * 2014-04-30 2018-08-03 한국전자통신연구원 시간 및 파장분할 다중화 방식의 수동형 광가입자망을 위한 광망종단장치의 광송신기 파워 제어방법 및 시스템
CN106576011B (zh) * 2014-08-13 2019-05-24 华为技术有限公司 无源光网络的通信方法、装置以及系统
CN105577265B (zh) * 2014-10-17 2020-04-24 中兴通讯股份有限公司 无源光网络系统的上行波长通道的校准方法及光网络单元
KR101572043B1 (ko) * 2014-12-12 2015-11-26 ㈜빛과 전자 Ｆｅｃ를 이용한 광트랜시버를 포함한 광송수신 시스템 및 원격 광파장 제어 방법
WO2016106573A1 (zh) * 2014-12-30 2016-07-07 华为技术有限公司 一种无源光网络波长配置的方法、设备和系统
CN104994181B (zh) * 2015-06-05 2018-04-06 上海斐讯数据通信技术有限公司 一种分布式olt系统中显示动态mac地址表的方法
KR102291403B1 (ko) * 2015-06-19 2021-08-23 한국전자통신연구원 하이브리드 수동형 광네크워크 시스템에서 파장 선택 방법 및 장치
CN108028972A (zh) * 2015-09-22 2018-05-11 华为技术有限公司 一种光网络单元注册的方法、装置及系统
CN107147513B (zh) * 2016-03-01 2019-03-15 中兴通讯股份有限公司 一种多波长无源光网络的管理方法及光模块
WO2017221878A1 (ja) * 2016-06-20 2017-12-28 日本電信電話株式会社 光送受信器及び制御方法
WO2019010649A1 (zh) * 2017-07-12 2019-01-17 华为技术有限公司 一种通道配置方法、装置及系统
US11039229B2 (en) * 2017-08-29 2021-06-15 Cable Television Laboratories, Inc. Systems and methods for coherent optics ranging and sensing
JP2019097108A (ja) * 2017-11-27 2019-06-20 富士通株式会社 光伝送装置、光伝送システムおよび光伝送方法
CN113472450A (zh) * 2018-01-26 2021-10-01 华为技术有限公司 一种olt、onu、pon系统和pon系统中的信息传输方法
US11309973B2 (en) * 2018-01-31 2022-04-19 Nokia Solutions And Networks Oy Optical burst monitoring
WO2020069648A1 (en) * 2018-10-02 2020-04-09 Huawei Technologies Co., Ltd. Transceiving with a predetermined frequency spacing
CN112104927B (zh) * 2019-06-17 2023-11-17 中兴通讯股份有限公司 一种无源光网络的波长切换、配置方法及装置
CN111010628B (zh) * 2019-11-30 2021-06-29 华为技术有限公司 上行资源授权方法和相关设备及计算机可读存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101222279A (zh) * 2007-01-09 2008-07-16 日立通讯技术株式会社 无源光网络系统和波长分配方法
CN101521837A (zh) * 2009-02-24 2009-09-02 上海大学 动态波分复用无源光网络实现在线升级的系统和方法
US20090322233A1 (en) * 2008-06-30 2009-12-31 Fujitsu Limited LIght detecting apparatus and output light intensity controller
CN101621723A (zh) * 2009-08-12 2010-01-06 烽火通信科技股份有限公司 一种wdm-pon系统的波长分配方法
CN101820557A (zh) * 2009-02-28 2010-09-01 华为技术有限公司 波分复用无源光网络的波长分配方法、系统和设备

Family Cites Families (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2301751B (en) 1995-06-02 2000-02-09 Dsc Communications Control message transmission in telecommunications systems
US6304350B1 (en) 1997-05-27 2001-10-16 Lucent Technologies Inc Temperature compensated multi-channel, wavelength-division-multiplexed passive optical network
WO2005104738A2 (en) * 2004-04-28 2005-11-10 Teknovus, Inc. Method and apparatus for l3-aware switching in an ethernet passive optical network
JP4704842B2 (ja) 2005-08-01 2011-06-22 株式会社日立製作所 Ｗｄｍ型ｐｏｎシステム
CA2601559C (en) * 2006-01-27 2013-04-30 Nippon Telegraph And Telephone Corporation Optical wavelength multiplexing access system
US8180223B2 (en) * 2006-02-03 2012-05-15 Fujitsu Limited System and method for extending reach in a passive optical network
CN101083593B (zh) * 2006-05-29 2010-04-21 华为技术有限公司 一种通信设备通信的方法和系统
US7925164B2 (en) * 2006-08-30 2011-04-12 Broadlight Ltd. Method and system for power management control in passive optical networks
KR100811423B1 (ko) * 2006-09-26 2008-03-07 주식회사 케이티 파장 무의존적 파장분할다중화 광 네트워크용 파장제어광송수신장치 및 그 광송수신장치에서의 파장정렬방법
US8824889B2 (en) * 2006-10-04 2014-09-02 Futurewei Technologies, Inc. High capacity optical frequency division multiple access passive optical network
KR100918390B1 (ko) * 2006-12-05 2009-09-21 한국전자통신연구원 외부의 룩업 테이블을 이용한 파장 초기화 방법 및 이를사용한 파장 가변형 광송수신 장치
JP4410789B2 (ja) * 2006-12-08 2010-02-03 株式会社日立コミュニケーションテクノロジー パッシブ光ネットワークシステム、光終端装置及び光ネットワークユニット
US8169956B2 (en) 2007-01-26 2012-05-01 Qualcomm Incorporated Mapping uplink acknowledgement transmission based on downlink virtual resource blocks
KR100893214B1 (ko) * 2007-03-22 2009-04-16 삼성전자주식회사 광 네트워크 유닛에서의 광 출력 제어장치 및 그 방법
CN101296034B (zh) * 2007-04-26 2012-07-11 华为技术有限公司 传输监测信息方法和装置、及无源光网络系统
US8744265B2 (en) * 2007-04-27 2014-06-03 Futurewei Technologies, Inc. Passive optical network with partially-tuned lasers
US20090129773A1 (en) * 2007-11-21 2009-05-21 Moshe Oron Method and apparatus for isolating a location of a fault in a passive optical network
US8041217B2 (en) 2007-11-27 2011-10-18 Fujitsu Limited System and method for managing wavelength drift in an optical network
RU2490829C2 (ru) * 2008-02-04 2013-08-20 Нокиа Сименс Нетуоркс Ой Отображение циклического сдвига на индекс канала для назначения ресурсов ack/nack
WO2010064981A1 (en) * 2008-12-01 2010-06-10 Telefonaktiebolaget L M Ericsson (Publ) Methods and devices for wavelength alignment in wdm-pon
JP5310057B2 (ja) * 2009-02-13 2013-10-09 富士通株式会社 半導体光増幅装置
WO2010107350A1 (en) * 2009-03-20 2010-09-23 Telefonaktiebolaget Lm Ericsson (Publ) Method and devices for automatic tuning in wdm-pon
US8787751B2 (en) * 2009-04-22 2014-07-22 Futurewei Technologies, Inc. Method for identifying the optical network unit power off reason
JP4909376B2 (ja) * 2009-05-19 2012-04-04 株式会社日立製作所 パッシブ光ネットワークシステムおよび波長割当方法
CN101998183B (zh) * 2009-08-10 2015-05-13 中兴通讯股份有限公司 一种无源光网络中ploam消息的传输方法及组装方法
EP2288063B1 (en) * 2009-08-21 2012-10-03 Nokia Siemens Networks Oy Data processing in an optical network
EP2497212B1 (en) * 2009-11-02 2019-05-08 Xieon Networks S.à r.l. Method and device for processing data in an optical network
WO2011110223A1 (en) * 2010-03-11 2011-09-15 Nokia Siemens Networks Oy Data processing of an optical network element
EP2506476B1 (en) * 2011-03-29 2019-02-06 ADVA Optical Networking SE Method of operating an optical network element and optical network element
US9667377B2 (en) 2011-04-08 2017-05-30 Futurewei Technologies, Inc. Wavelength indication in multiple-wavelength passive optical networks
US9219566B2 (en) * 2011-04-08 2015-12-22 Futurewei Technologies, Inc. Wavelength management in multiple-wavelength passive optical networks
WO2012149764A1 (zh) * 2011-09-22 2012-11-08 华为技术有限公司 光通信系统中的波长分配方法、光网络单元及光网络系统
JP5705097B2 (ja) * 2011-12-07 2015-04-22 株式会社日立製作所 受動光網システム、局側光伝送路終端装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101222279A (zh) * 2007-01-09 2008-07-16 日立通讯技术株式会社 无源光网络系统和波长分配方法
US20090322233A1 (en) * 2008-06-30 2009-12-31 Fujitsu Limited LIght detecting apparatus and output light intensity controller
CN101521837A (zh) * 2009-02-24 2009-09-02 上海大学 动态波分复用无源光网络实现在线升级的系统和方法
CN101820557A (zh) * 2009-02-28 2010-09-01 华为技术有限公司 波分复用无源光网络的波长分配方法、系统和设备
CN101621723A (zh) * 2009-08-12 2010-01-06 烽火通信科技股份有限公司 一种wdm-pon系统的波长分配方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2863564A4 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015164043A1 (en) * 2014-04-21 2015-10-29 Arris Enterprises, Inc. Apparatus and system for managing wavelengths in optical networks
US9413468B2 (en) 2014-04-21 2016-08-09 Arris Enterprises, Inc. Optical combiner energy harvesting
TWI574519B (zh) * 2014-04-21 2017-03-11 艾銳勢企業公司 光學組合器之能量收穫
US9923639B2 (en) 2014-04-21 2018-03-20 Arris Enterprises Llc Optical combiner energy harvesting
US11362734B2 (en) 2014-04-21 2022-06-14 Arris Enterprises Llc Systems and methods for optical modulation index calibration in a CATV network
EP3149956A4 (en) * 2014-06-25 2017-07-05 Huawei Technologies Co., Ltd. Optical line terminal (olt) support of optical network unit (onu) calibration
US9768905B2 (en) 2014-06-25 2017-09-19 Futurewei Technologies, Inc. Optical line terminal (OLT) support of optical network unit (ONU) calibration
US10014974B2 (en) 2014-06-25 2018-07-03 Futurewei Technologies, Inc. Optical line terminal (OLT) support of optical network unit (ONU) calibration
AU2015281459B2 (en) * 2014-06-25 2018-12-20 Huawei Technologies Co., Ltd. Optical line terminal (OLT) support of optical network unit (ONU) calibration
EP3280093A4 (en) * 2015-04-20 2018-10-31 ZTE Corporation Registration method and apparatus
CN107925502A (zh) * 2015-09-07 2018-04-17 华为技术有限公司 一种无源光网络通信的方法、装置及系统
US10652635B2 (en) 2015-09-07 2020-05-12 Huawei Technologies Co., Ltd. Passive optical network communications method and apparatus, and system

Also Published As

Publication number Publication date
KR20150023715A (ko) 2015-03-05
AU2012382310A1 (en) 2015-01-22
US20170207876A1 (en) 2017-07-20
US9647791B2 (en) 2017-05-09
US20150098704A1 (en) 2015-04-09
EP2863564A4 (en) 2015-04-29
JP2015526938A (ja) 2015-09-10
MX2014015374A (es) 2015-05-12
MX338111B (es) 2016-04-01
EP2863564A1 (en) 2015-04-22
JP5967744B2 (ja) 2016-08-10
RU2581625C1 (ru) 2016-04-20
CN103636153B (zh) 2016-09-14
CN103636153A (zh) 2014-03-12
SG11201408322YA (en) 2015-02-27
KR101688445B1 (ko) 2016-12-22
AU2012382310B2 (en) 2016-05-26

Similar Documents

Publication Publication Date Title
WO2013185306A1 (zh) 多波长无源光网络的波长配置方法、系统和装置
US9929827B2 (en) Wavelength negotiation method and apparatus of multi-wavelength passive optical network, and multi-wavelength passive optical network system
US10123101B2 (en) Communication method applied to multi-wavelength passive optical network, apparatus, and system
US8977127B2 (en) Inter-optical line terminal (OLT) communication in multiple-OLT passive optical networks (PONs)
US20180212705A1 (en) Optical network unit registration method, apparatus, and system
AU2012239194A1 (en) Wavelength management in multiple-wavelength passive optical networks
EP2768160A1 (en) Method and apparatus for processing uplink data abnormity
KR20170003649A (ko) 파장 스위칭 방법, 장치, 및 시스템
US9819437B2 (en) Rogue optical network unit mitigation in passive optical networks
EP3082284B1 (en) Communication method, device, and system for passive optical network
CN106059704A (zh) 波长配置方法、系统和装置
KR102017882B1 (ko) 시간 및 파장 분할 다중 - 수동형 광 네트워크에서의 파장 튜닝 방법

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: 12878781

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2015516400

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: MX/A/2014/015374

Country of ref document: MX

REEP Request for entry into the european phase

Ref document number: 2012878781

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2012878781

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 20157000712

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2015100260

Country of ref document: RU

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: IDP00201500182

Country of ref document: ID

ENP Entry into the national phase

Ref document number: 2012382310

Country of ref document: AU

Date of ref document: 20120613

Kind code of ref document: A