WO2019233177A1 - Procédé, dispositif et système permettant de traiter un signal de réseau optique passif - Google Patents

Procédé, dispositif et système permettant de traiter un signal de réseau optique passif Download PDF

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Publication number
WO2019233177A1
WO2019233177A1 PCT/CN2019/082320 CN2019082320W WO2019233177A1 WO 2019233177 A1 WO2019233177 A1 WO 2019233177A1 CN 2019082320 W CN2019082320 W CN 2019082320W WO 2019233177 A1 WO2019233177 A1 WO 2019233177A1
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WIPO (PCT)
Prior art keywords
wavelength
optical network
precoding
signal
network unit
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PCT/CN2019/082320
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English (en)
Chinese (zh)
Inventor
高波
刘德坤
景磊
吴徐明
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华为技术有限公司
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Publication of WO2019233177A1 publication Critical patent/WO2019233177A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/497—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems by correlative coding, e.g. partial response coding or echo modulation coding transmitters and receivers for partial response systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/497—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems by correlative coding, e.g. partial response coding or echo modulation coding transmitters and receivers for partial response systems
    • H04L25/4975—Correlative coding using Tomlinson precoding, Harashima precoding, Trellis precoding or GPRS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • 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

Definitions

  • the present invention relates to the field of communication technology, and more particularly, to a method, a device, and a system for processing a passive optical network (PON) signal.
  • PON passive optical network
  • PONs passive optical networks
  • a PON system includes an optical line terminal (OLT) located at the central office, multiple optical network units or optical network terminals (ONU or Optical Network Terminal) (ONT) located at the user side, and An optical distribution network (Optical Distribution Network, ODN) for multiplexing / demultiplexing optical signals between an optical line terminal and an optical network unit.
  • ODN optical Distribution Network
  • the optical line terminal and the optical network unit perform uplink and downlink data transmission and reception through an optical module provided in the optical line terminal and the optical network unit.
  • GPON gigabit PON
  • EPON Ethernet PON
  • 10GPON or 10GEPON 10GPON or 10GEPON
  • uplink from ONU to OLT
  • downlink the direction from the OLT to the ONU
  • the uplink and downlink bandwidth are shared by multiple ONUs, which limits the bandwidth increase of each ONU.
  • the following ONUs are ONU and / Or ONT's name.
  • TWDM-PON is a Time Division Wavelength Division Multiplexing Passive Optical Network (Time Division Multiplex PON, TWDM-PON).
  • TWDM-PON is a time division multiplex (Time Division Multiplex (TDM)) and wavelength division multiplex (Time Division Multiplex (WDM)) hybrid system.
  • TDM Time Division Multiplex
  • WDM Time Division Multiplex
  • the uplink The direction is also multiple wavelengths (typically 4 to 8) transmitted in WDM mode.
  • Each ONU can choose to receive data at any downstream wavelength and upload data at any upstream wavelength.
  • the specific wavelength allocation is controlled by the OLT, which is mainly controlled by the Media Access Control (MAC) module of the OLT.
  • MAC Media Access Control
  • Each wavelength also works in TDM mode, that is, one wavelength can access multiple ONUs, and each ONU that accesses the same wavelength in the downstream direction occupies a part of the bandwidth of the time slot; each ONU that accesses the same wavelength in the upstream direction shares time upload data.
  • TWDM-PON which wavelength the ONU is registered to is controlled by the OLT.
  • the laser Laser, Diode, LD
  • the photodetector Photo Deetector, or PhotoDiode, PD
  • pluggable optical modules such as small pluggable modules ( Small Form-factor (Pluggable, SFP)
  • SFP Small Form-factor
  • the IEEE 802.3 working group established the IEEE 802.3ca 100G-EPON working group in November 2015.
  • the standard plan supports 25G / 50G / 100G multiple media access control layer (MAC) rates, of which the single-wavelength transmission rate must be Up to 25Gbps, 4 wavelength wavelength division multiplexing to achieve 100Gbps transmission.
  • MAC media access control layer
  • the 25GEPON system adds precoding and de-precoding functions to the Physical Coding Sublayer (PCS), but the precoding function of the wavelength channel cannot be changed once it is configured at the factory.
  • PCS Physical Coding Sublayer
  • the embodiments of the present application provide a method, a device, and a system for processing a passive optical network signal.
  • the precoding function of each wavelength channel can be turned on and off at any time.
  • an embodiment of the present application provides a method for processing a passive optical network signal, wherein the passive optical network includes an optical line terminal and an optical network unit, and the optical line terminal communicates with the optical line terminal through multiple wavelength channels.
  • the optical network unit is connected, and the direction from the optical line terminal to the optical network unit is downlink, and the direction from the optical network unit to the optical line terminal is uplink.
  • the method includes: the optical line terminal generates an instruction message Sending the instruction message to the optical network unit, where the instruction message carries wavelength information of at least one wavelength and whether the signal to be received by the optical network unit on a downlink wavelength channel corresponding to the at least one wavelength is decoded If the instruction information instructs the optical network unit to decode, the optical line terminal starts precoding the signal to be transmitted on the downlink wavelength channel corresponding to the at least one wavelength; if the instruction information indicates the optical If the network unit does not decode, the optical line terminal does not decode signals to be transmitted on the downlink wavelength channel corresponding to the at least one wavelength. Line pre-coding.
  • the instruction message further includes time information for starting precoding parameter adjustment; if the instruction information instructs the optical network unit to perform decoding, the instruction message is sent to the optical network unit to start Timing, precoding the signals to be sent on the downlink wavelength channel corresponding to the at least one wavelength after the start switching time is reached.
  • the method further includes: the optical line terminal configures corresponding precoding configuration information for a signal to be transmitted on a downlink wavelength channel corresponding to the at least one wavelength; the optical line terminal broadcasts the precoding configuration information downstream.
  • the method before issuing the instruction message, the method further includes: the optical line terminal sends a precoding information query request to the optical network unit; the optical line terminal obtains the at least one wavelength corresponding to the optical network unit report The reference information for the decoding information and / or decoding capability and / or decoding function of the signal to be received on the downlink wavelength channel of the LTE and the precoding status of the signal to be transmitted on the uplink wavelength channel corresponding to the at least one wavelength and / Or precoding capability and / or precoding disable and enable reference configuration.
  • the method further includes: downlink broadcasting a message of whether a signal to be sent on the uplink wavelength channel corresponding to at least one wavelength of the optical network unit is precoded.
  • an embodiment of the present application provides a method for processing a passive optical network signal.
  • the method includes: the optical network unit receives an instruction message issued by an optical line terminal, and the instruction message carries wavelength information of at least one wavelength. And indication information of whether the optical network unit decodes a signal to be received on a downlink wavelength channel corresponding to the at least one wavelength; if the indication information indicates that the optical network unit decodes, the optical network unit performs decoding on the at least one The signal to be received on the downlink wavelength channel corresponding to the wavelength starts to be decoded; if the instruction information indicates that the optical network unit does not decode, the optical network unit stops the signal to be received on the downlink wavelength channel corresponding to the at least one wavelength decoding.
  • the method further includes: receiving, by the optical network unit, a message whether a signal to be sent on a downlink wavelength channel corresponding to the at least one wavelength broadcast by the optical line terminal is precoded.
  • the method further includes: the optical network unit receives a precoding information query request sent by the optical line terminal; the optical network unit reports decoding information of a signal to be received on a downlink wavelength channel corresponding to the at least one wavelength and And / or a decoding capability and / or a decoding function to disable and enable a reference configuration, and a precoding status and / or a precoding capability and / or a precoding disable and enable of a signal to be transmitted on an uplink wavelength channel corresponding to the at least one wavelength.
  • the indication message further includes time information for starting precoding or prohibiting precoding; the optical network unit starts timing after receiving the adjustment message, and corresponds to the at least one wavelength after reaching the expected time.
  • a signal to be received on the downlink wavelength channel of the CDMA starts decoding or a signal to be received on the downlink wavelength channel of the at least one wavelength is stopped from decoding.
  • the method further includes: receiving, by the optical network unit, a message indicating whether a signal to be sent is precoded on an uplink wavelength channel corresponding to the at least one wavelength of the optical network unit broadcasted by the optical line terminal.
  • the method further includes: the optical network unit receives an authorization message issued by the optical line terminal, and waits on an uplink wavelength channel corresponding to the at least one wavelength in an uplink time slot identified by the authorization message.
  • the transmitted signal starts encoding or is adjusted from encoding to not encoding.
  • an embodiment of the present application provides an optical line terminal, including: a generating unit configured to generate an instruction message; and a first sending unit configured to deliver an instruction message to an optical network unit, where the instruction message carries at least Wavelength information of one wavelength and indication information of whether the optical network unit decodes a signal to be received on a downlink wavelength channel corresponding to the at least one wavelength; a first precoding unit, configured to: if the indication information indicates the optical When the network unit decodes, precoding is performed on a signal to be transmitted on a downlink wavelength channel corresponding to the at least one wavelength; if the instruction information indicates that the optical network unit does not decode, the downlink wavelength corresponding to the at least one wavelength The signals to be transmitted on the channel are not precoded.
  • the optical line terminal further includes: a configuration unit configured to respectively configure corresponding precoding configuration information for a signal to be transmitted on a downlink wavelength channel corresponding to the at least one wavelength; the first sending unit, It is also used for downlink broadcast of the precoding configuration information.
  • the optical line terminal further includes a first receiving unit, and the first sending unit is further configured to send a precoding information query request to the optical network unit; the first receiving unit is configured to obtain the optical
  • the precoding is disabled or enabled and / or the precoding capability and / or the precoding function is disabled and enabled for the reference configuration reported by the network unit for the downstream wavelength channel and the upstream wavelength channel corresponding to the at least one wavelength.
  • the instruction message further includes time information for enabling precoding or prohibiting precoding
  • the optical line terminal further includes: a first timing unit, configured to start after issuing the instruction message to the optical network unit. Timing, precoding the signals to be sent on the downlink wavelength channel corresponding to the at least one wavelength after the start switching time is reached.
  • the first sending unit is further configured to broadcast a message about whether a signal to be sent is precoded on an uplink wavelength channel corresponding to the at least one wavelength of the optical network unit.
  • an embodiment of the present application provides an optical network unit, including: a second receiving unit configured to receive an instruction message issued by an optical line terminal, where the instruction message carries wavelength information of at least one wavelength and the Indication information of whether an optical network unit decodes a signal to be received on a downlink wavelength channel corresponding to the at least one wavelength; a second precoding unit, configured to: if the indication information instructs the optical network unit to decode, Decoding of signals to be received on the downlink wavelength channel corresponding to at least one wavelength starts; if the instruction information indicates that the optical network unit does not decode, decoding of signals to be received on the downlink wavelength channel corresponding to the at least one wavelength stops being decoded .
  • the second receiving unit is further configured to receive a message indicating whether signals to be sent on all downlink wavelength channels broadcast by the optical line terminal are pre-encoded.
  • the second receiving unit is further configured to receive a precoding information query request issued by an optical line terminal; and the second sending unit is configured to report a downlink wavelength channel corresponding to the at least one wavelength.
  • the decoding information and / or decoding capability and / or decoding function of the received signal disable and enable the reference configuration, and the precoding status and / or precoding capability of the signal to be transmitted on the uplink wavelength channel corresponding to the at least one wavelength and / Or precoding disables and enables the reference configuration.
  • the instruction message further includes time information for starting precoding or prohibiting precoding
  • the optical network unit further includes: a second timing unit, configured to start timing after receiving the adjustment message, After the expected time is reached, decoding of signals to be received on the downlink wavelength channel corresponding to the at least one wavelength is started, or decoding of signals to be received on the downlink wavelength channel corresponding to the at least one wavelength is stopped.
  • the second receiving unit further receives a message whether the signal to be sent on the uplink wavelength channel corresponding to the at least one wavelength of the optical network unit broadcasted by the optical line terminal is precoded.
  • the second receiving unit further receives an authorization message issued by the optical line terminal; the second control unit is further configured to perform an authentication on the uplink time slot identified by the authorization message.
  • the signal to be transmitted on the uplink wavelength channel corresponding to the at least one wavelength is started to be encoded or adjusted from encoding to not encoding.
  • an embodiment of the present application provides a passive optical network system.
  • the passive optical network system includes the optical line terminal according to the third aspect and the optical network unit according to the fourth aspect.
  • an embodiment of the present application provides a network device, including: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer to execute an instruction; the processor is connected to the memory through the bus; when the device is When running, the processor executes the computer execution instructions stored in the memory, so that the apparatus executes the method of any one of the first aspect or the second aspect.
  • a computer storage medium for storing computer software instructions, which includes a program for executing the method according to any one of the first aspect or the second aspect.
  • a computer program product which includes computer software instructions that can be loaded by a processor to execute a program such as the method of any one of the first aspect or the second aspect.
  • protection topics are different between different embodiments, but specific implementation details can be referred to each other. Some protection topics do not specifically explain the implementation details, and can refer to other various topics.
  • the precoding function of each wavelength channel between the optical line terminal and the optical network unit in the embodiment of the present invention can be turned on and off at any time. Compared with the device of the corresponding category selected during the existing installation, the device is installed using this solution. No distinction is required at any time, and the precoding function can be switched as required after installation.
  • FIG. 1 (a) is a schematic structural diagram of an existing GPON passive optical network system
  • FIG. 1 (b) is a schematic structural diagram of an existing TWDM-PON passive optical network system
  • FIG. 2 is a flowchart of a method for processing a passive optical network signal according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of an optical line terminal according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an optical line terminal according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an optical line terminal according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of an optical network unit according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an optical network unit according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a network device according to an embodiment of the present invention.
  • FIGS 1 (a) and 1 (b) are schematic diagrams of the structure of a GPON passive optical network system.
  • the passive optical network system includes an optical line terminal OLT 110, multiple optical network units ONU 120, and the OLT 110 and ONU 120 are connected through an optical distribution network ODN130.
  • the OLT 110 further includes a data processing module 111 and an optical module 112.
  • the data processing module may also be referred to as a MAC module, which is used to manage and control the optical module 112.
  • the ODN 130 further includes a backbone fiber 133, a first-stage splitter splitter 131, a first-stage branch optical fiber 134, a second-stage splitter 132, and a second-stage branch optical fiber 135.
  • the ONU further includes an optical module 123 for receiving a downlink optical signal and sending an uplink optical signal.
  • FIG. 2 is a schematic structural diagram of a TWDM-PON passive optical network system.
  • the TWDM-PON system includes one OLT 210, multiple ONUs 220, and ODN 230.
  • the OLT 210 is connected to multiple ONUs 220 in a point-to-multipoint (P2MP) manner through the ODN 230.
  • Multiple ONUs 220 share the optical transmission medium of ODN 230.
  • the ODN 230 may include a backbone optical fiber 231, an optical power branching module 232, and a plurality of branch optical fibers 233.
  • the optical power branching module 232 may be set at a remote node (Remote Node, RN).
  • RN remote node
  • the communication link between the OLT 210 and the multiple ONUs 220 may include multiple wavelength channels, and the multiple wavelength channels share the optical transmission medium of the ODN 230 through the WDM method.
  • Each ONU220 can work in one of the wavelength channels of the TWDM-PON system, and each wavelength channel can carry one or more ONU220 services.
  • ONU220s working in the same wavelength channel can share the wavelength channel through TDM.
  • a TWDM-PON system having four wavelength channels is used as an example for description. It should be understood that in practical applications, the number of wavelength channels of the TWDM-PON system may also be determined according to network requirements.
  • the four wavelength channels of the TWDM-PON system are named as wavelength channel 1, wavelength channel 2, wavelength channel 3, and wavelength channel 4 in FIG. 2, where each wavelength channel uses a pair of uplink and downlink wavelengths, respectively.
  • the upstream and downstream wavelengths of wavelength channel 1 can be ⁇ u1 and ⁇ d1
  • the upstream and downstream wavelengths of wavelength channel 2 can be ⁇ u2 and ⁇ d2
  • the upstream and downstream wavelengths of wavelength channel 3 can be ⁇ u3 and ⁇ d3, respectively.
  • the upstream and downstream wavelengths of the wavelength channel 4 may be ⁇ u4 and ⁇ d4, respectively.
  • Each wavelength channel can have a corresponding wavelength channel identification (for example, the channel numbers of the above four wavelength channels can be 1, 2, 3, and 4 respectively), that is, the wavelength channel identification matches the upstream and downstream wavelengths of the identified wavelength channel. Relationship, OLT210 and ONU220 can learn the uplink wavelength and downlink wavelength of the wavelength channel according to the wavelength channel identification.
  • the OLT 210 may include an optical coupler 211, a first wavelength division multiplexer 212, a second wavelength division multiplexer 213, a plurality of downlink optical transmitters Tx1 to Tx4, a plurality of uplink optical receivers Rx1 to Rx4, and a processing module 214.
  • multiple downlink optical transmitters Tx1 to Tx4 are connected to the optical coupler 211 through the first wavelength division multiplexer 212
  • multiple uplink optical receivers Rx1 to Rx4 are connected to the optical coupler through the second wavelength division multiplexer 213.
  • the coupler 211 is further connected to the backbone optical fiber 231 of the ODN 230.
  • each downlink optical transmitter Tx1 to Tx4 can correspond to one wavelength channel of the TWDM-PON system, such as multiple downlink optical transmitters Tx1 to Tx4.
  • the emission wavelengths can be ⁇ d1 to ⁇ d4, respectively.
  • the downlink optical transmitters Tx1 to Tx4 can transmit downlink data to the corresponding wavelength channel by using their emission wavelengths ⁇ d1 to ⁇ d4, respectively, so as to be received by the ONU 120 working in the corresponding wavelength channel.
  • the receiving wavelengths of multiple uplink optical receivers Rx1 to Rx4 may be different, and each of the uplink optical receivers Rx1 to Rx4 also corresponds to one wavelength channel of the TWDM-PON system, for example, multiple uplink optical
  • the receiving wavelengths of the receivers Rx1 to Rx4 may be ⁇ u1 to ⁇ u4, respectively.
  • the uplink optical receivers Rx1 to Rx4 can respectively use their receiving wavelengths ⁇ u1 to ⁇ u4 to receive uplink data sent by the ONU 220 operating in the corresponding wavelength channel.
  • the first wavelength-division multiplexer 212 is configured to perform wavelength-division multiplexing on the downlink data transmitted by multiple downlink optical transmitters Tx1 to Tx4 with wavelengths ⁇ d1 to ⁇ d4, and send the data to the backbone fiber of ODN230 through the optical coupler 211. 231, so as to provide downlink data to the ONU 220 through the ODN 230.
  • the optical coupler 211 can also be used to provide uplink data from multiple ONUs 220 with wavelengths ⁇ u1 to ⁇ u4 to the second wavelength division multiplexer 213, and the second wavelength division multiplexer 213 can respectively provide wavelengths to ⁇ u1
  • the uplink data of ⁇ ⁇ u4 is demultiplexed to the uplink optical receivers Rx1 to Rx4 for data reception.
  • the processing module 214 may be a Media Access Control (MAC) module.
  • MAC Media Access Control
  • it can specify a working wavelength channel for multiple ONU220s through wavelength negotiation, and according to the working wavelength channel of an ONU220, it will send to the ONU220 the
  • the downlink data is provided to the downlink optical transmitters Tx1 to Tx4 corresponding to the wavelength channel, so that the downlink optical transmitters Tx1 to Tx4 transmit the downlink data to the corresponding wavelength channel.
  • MAC Media Access Control
  • the processing module 214 can also perform uplink for each wavelength channel
  • the dynamic bandwidth allocation (Dynamic Bandwidth Allocation, DBA) is used to allocate an uplink transmission time slot to the ONU 220 multiplexed to the same wavelength channel by TDM to authorize the ONU 220 to send uplink data through its corresponding wavelength channel at the specified time slot.
  • DBA Dynamic Bandwidth Allocation
  • the uplink transmit wavelength and downlink receive wavelength of each ONU220 are adjustable.
  • the ONU220 can adjust its own uplink transmit wavelength and downlink receive wavelength to the uplink and downlink wavelengths of the wavelength channel respectively according to the wavelength channel specified by the OLT210, so as to achieve Send and receive uplink and downlink data through this wavelength channel.
  • Ethernet passive optical networks EPON
  • GPON Gigabit Passive Optical Networks
  • 10G EPON single-wave 25G EPON, 2x25G EPON, single-wave 50G EPON, 2x50G EPON, and 100G EPON.
  • the method includes steps S200 to S208.
  • the specific implementation of each step is as follows:
  • the OLT After the ONU is successfully registered, the OLT sends a precoding information query request to the ONU.
  • a value of 0x8808 is recommended.
  • the ONU responds to the query request of the OLT, and reports decoding information and / or decoding capabilities and / or decoding functions of the signals to be received on each downlink wavelength channel.
  • the reference configuration is disabled and enabled.
  • the signal's precoding status and / or precoding capability and / or precoding disable and enable the reference configuration.
  • the OLT obtains the decoding information and / or decoding capability and / or decoding function of the signal to be received on each downlink wavelength channel reported by the ONU, and disables and enables the reference configuration, and the signal to be transmitted on each upstream wavelength channel. Precoding status and / or precoding capability and / or precoding disable and enable reference configuration.
  • the OLT configures corresponding precoding configuration information for each signal to be transmitted on the downlink wavelength channel between the OLT and the ONU, and broadcasts the precoding configuration information downstream.
  • the OLT sends an instruction message to the ONU.
  • the instruction message carries wavelength information of at least one wavelength and indication information of whether the optical network unit decodes a signal to be received on a downlink wavelength channel corresponding to the at least one wavelength.
  • the indication message may be sent periodically or triggered at a certain time as needed, and the encoding of one or more wavelength channels may be changed.
  • Field byte Destination address 6 Source address 6 Length type value (L / T) 2 Opcode 2 Timestamp 4 Channel Configuration (CH Assignment) 1 Channel 1 Switch Time (Switch Time # 1) 4 Channel 2 switching time (Switch Time # 2) 4 Channel 3 switch time (Switch Time # 3) 4 Channel 4 switch time (Switch Time # 4) 4 reserved text twenty three Frame Check Sequence (FCS) 4
  • each downlink wavelength channel is different, and there are multiple combinations.
  • One instruction message may have different instructions between multiple wavelength channels.
  • a local timer is started to start counting, and when the switching time is reached, precoding is performed on a signal to be sent on a downlink wavelength channel corresponding to the at least one wavelength.
  • the ONU After receiving the indication message, the ONU starts a local timer and starts counting. If the instruction instructs the optical network unit to decode, the timer is started after the instruction message is sent to the optical network unit, and after the switching time is reached, the to-be-sent on the downlink wavelength channel corresponding to the at least one wavelength The signal is pre-coded.
  • the ONU After the ONU receives the instruction message, if the instruction information instructs the optical network unit to decode, it starts to decode a signal to be received on the downlink wavelength channel corresponding to the at least one wavelength; if the instruction information indicates the The optical network unit does not decode, and stops decoding a signal to be received on a downlink wavelength channel corresponding to the at least one wavelength. For example, when the designated bit in the indication message is "0", it means that the optical line terminal has no precoding, and the ONU side does not need to decode; when the bit is "1", it means that the OLT side turns on the precoding, and instructs the ONU to perform at least one The signal to be received on the downlink wavelength channel corresponding to the wavelength starts to be decoded.
  • the ONU can feedback the enable response information to the OLT, and the enable response information can be carried in the registration response message (Register_ACK) to inform the OLT whether the ONU decodes.
  • the ONU receives a message indicating whether a signal to be sent on the uplink wavelength channel corresponding to each wavelength of the optical network unit broadcast by the OLT is pre-encoded.
  • the ONU receives an authorization message delivered by the OLT that carries uplink precoding enabled or enabled, and encodes signals to be sent on the upstream wavelength channel in the uplink time slot identified by the authorization message or adjusts the encoding to not encoding. .
  • the OLT can query the ONU precoding related information at any time.
  • the precoding function of each wavelength channel between the optical line terminal and the optical network unit in the embodiment of the present invention can be turned on and off at any time. Compared with the device of the corresponding category selected during the existing installation, the device is installed using this solution. No distinction is required at any time, and the precoding function can be switched as required after installation.
  • an optical line terminal including:
  • the generating unit 301 is configured to generate an instruction message.
  • the first sending unit 302 is configured to send an instruction message to an optical network unit, where the instruction message carries wavelength information and whether a signal to be received by the optical network unit on a downlink wavelength channel corresponding to the at least one wavelength is decoded. Instructions.
  • the first precoding unit 303 is configured to start precoding a signal to be sent on a downlink wavelength channel corresponding to the at least one wavelength if the instruction information instructs the optical network unit to decode; if the instruction information indicates the If the optical network unit does not decode, the signal to be transmitted on the downlink wavelength channel corresponding to the at least one wavelength is not pre-coded.
  • the optical line terminal further includes:
  • the configuration unit 304 is configured to respectively configure corresponding precoding configuration information for a signal to be sent on a downlink wavelength channel corresponding to the at least one wavelength.
  • the aforementioned first sending unit 302 is further configured to downlink broadcast the precoding configuration information.
  • the optical line terminal further includes a first receiving unit 305.
  • the first sending unit 301 sends a precoding information query request to the optical network unit
  • the first receiving unit 305 obtains the optical
  • the precoding is disabled or enabled for each downlink wavelength channel and uplink wavelength channel reported by the network unit, and / or the precoding capability and / or the precoding function is disabled and enabled for the reference configuration.
  • the OLT not only broadcasts the precoding disabled or enabled status of the downlink wavelength channel.
  • the first sending unit 302 also broadcasts whether the signal to be sent on the uplink wavelength channel corresponding to each wavelength of the optical network unit is precoded. Message.
  • the instruction message further includes time information for starting precoding or disabling precoding.
  • the OLT further includes:
  • the first timing unit 306 is configured to start timing after sending the instruction message to the optical network unit, and perform precoding on a signal to be sent on a downlink wavelength channel corresponding to the at least one wavelength after a start switching time is reached.
  • an optical network unit including:
  • the second receiving unit 401 is configured to broadcast a message about whether a signal to be sent on the uplink wavelength channel corresponding to each wavelength of the optical network unit is precoded.
  • a second precoding unit 402 configured to start decoding a signal to be received on a downlink wavelength channel corresponding to the at least one wavelength if the instruction information instructs the optical network unit to decode; if the instruction information indicates that If the optical network unit does not decode, it stops decoding a signal to be received on a downlink wavelength channel corresponding to the at least one wavelength.
  • the second receiving unit 401 is further configured to receive a message indicating whether signals to be sent on all downlink wavelength channels broadcast by the optical line terminal are precoded.
  • the second receiving unit 401 is further configured to receive a precoding information query request issued by an optical line terminal; and further includes a second sending unit configured to report a signal to be received on each downlink wavelength channel.
  • Decoding information and / or decoding capability and / or decoding function disable and enable reference configuration, and precoding status and / or precoding capability and / or precoding disable and enable reference of signals to be sent on each uplink wavelength channel Configuration.
  • the OLT not only broadcasts the precoding disabled or enabled state of the downlink wavelength channel.
  • the OLT also broadcasts a message whether the signal to be sent on the uplink wavelength channel corresponding to each wavelength of the optical network unit is precoded.
  • the second receiving unit 401 of the ONU also receives a message indicating whether the signal to be sent on the upstream wavelength channel corresponding to each wavelength of the optical network unit broadcasted by the optical line terminal is precoded.
  • the second receiving unit 401 further receives an authorization message issued by the OLT.
  • the second precoding unit 402 is further configured to start coding or adjust coding to non-coding of a signal to be sent on an uplink wavelength channel in an uplink time slot identified by the authorization message.
  • the instruction message further includes time information for starting precoding or disabling precoding.
  • the ONU further includes:
  • the second timing unit 403 is configured to start timing after receiving the adjustment message, and after the expected time is reached, decoding of a signal to be received on the downlink wavelength channel corresponding to the at least one wavelength or decoding of the at least one wavelength The decoding of signals to be received on the downlink wavelength channel is stopped.
  • an embodiment of the present application provides a network device.
  • the network device may be an OLT or an ONU.
  • the device includes a processor 510, a memory 520, a transceiver 530, and a wavelength division multiplexer 540.
  • the processor 510 may use a general-purpose central processing unit (Central Processing Unit, CPU), a microprocessor, an application specific integrated circuit ASIC, or at least one integrated circuit for executing related programs to implement the technology provided by the embodiment of the present invention. Program.
  • CPU Central Processing Unit
  • ASIC application specific integrated circuit
  • the memory 520 may be a read-only memory (Read Only Memory, ROM), a static storage device, a dynamic storage device, or a random access memory (Random Access Memory, RAM).
  • the memory 520 may store an operating system and other application programs.
  • the program code for implementing the technical solution provided by the embodiment of the present invention is stored in the memory 520 and executed by the processor 510.
  • the processor 510 may include a memory 520 inside. In another embodiment, the processor 510 and the memory 520 are two separate structures.
  • the transceiver 540 may include a light transmitter and / or a light receiver.
  • the optical transmitter can be used to send optical signals, and the optical receiver can be used to receive optical signals.
  • the light transmitter can be realized by a light emitting device, such as a gas laser, a solid-state laser, a liquid laser, a semiconductor laser, a direct-tuning laser, and the like.
  • the light receiver can be implemented by a light detector, such as a photodetector or a photodiode (such as an avalanche diode).
  • the transceiver 540 may further include a digital-to-analog converter and an analog-to-digital converter.
  • the wavelength division multiplexer 850 is connected to the transceiver 540.
  • the wavelength division multiplexer serves as a multiplexer.
  • the wavelength division multiplexer acts as a demultiplexer.
  • Wavelength division multiplexers can also be called optical couplers.
  • an embodiment of the present application provides a computer storage medium for storing computer software instructions, which includes a program for executing the foregoing method shown in FIG. 2.
  • an embodiment of the present application provides a computer program product including computer software instructions, and the computer software instructions can be loaded by a processor to execute the program of the method shown in FIG. 2.
  • the present invention also provides a PON system, which includes the optical line terminal and the optical network unit.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, a computer, a server, or a data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes one or more available medium integration.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (Solid State Disk (SSD)), and the like.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Optical Communication System (AREA)

Abstract

Selon certains modes de réalisation, la présente invention concerne un procédé, un dispositif et un système permettant d'activer et de désactiver une fonction de précodage de canal de longueur d'onde d'un réseau optique passif, une pluralité de canaux de longueur d'onde de liaison descendante et une pluralité de canaux de longueur d'onde de liaison montante étant compris entre un terminal de ligne optique et une unité de réseau facultative. Le procédé comprend les étapes suivantes : un terminal de ligne optique génère un message d'instruction et émet le message d'instruction à l'unité de réseau optique, le message d'instruction portant des informations de longueur d'onde d'au moins une longueur d'onde et des informations d'instruction quant à savoir si un signal à recevoir sur un canal de longueur d'onde de liaison descendante correspondant à ladite longueur d'onde est décodé par l'unité de réseau optique; si les informations d'instruction ordonnent à l'unité de réseau optique de décoder, pré-coder un signal à envoyer sur le canal de longueur d'onde de liaison descendante correspondant à la ou aux longueurs d'onde qui est pré-codé; si les informations d'instruction ordonnent à l'unité de réseau optique de ne pas décoder, ne pas précoder le signal à envoyer sur le canal de longueur d'onde de liaison descendante correspondant à la ou aux longueurs d'onde. Dans les modes de réalisation de la présente invention, la fonction de précodage de chaque canal de longueur d'onde entre le terminal de ligne optique et l'unité de réseau optique peut être activée et désactivée à tout moment.
PCT/CN2019/082320 2018-06-07 2019-04-11 Procédé, dispositif et système permettant de traiter un signal de réseau optique passif WO2019233177A1 (fr)

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CN201810582944.2 2018-06-07
CN201810582944.2A CN110582030A (zh) 2018-06-07 2018-06-07 无源光网络信号的处理方法、装置和系统

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102170330A (zh) * 2011-04-29 2011-08-31 中兴通讯股份有限公司 测量参考信号的发送方法及系统
EP2741438A2 (fr) * 2012-12-10 2014-06-11 Hitachi Ltd. Système de réseau, appareil côté station et procédé de commande de communications
CN104506970A (zh) * 2014-12-22 2015-04-08 东南大学 基于光预编码的轮询式无源光网络光层检测方法
US20170070295A1 (en) * 2015-09-09 2017-03-09 Futurewei Technologies, Inc. Channel Bonding in Passive Optical Networks

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102170330A (zh) * 2011-04-29 2011-08-31 中兴通讯股份有限公司 测量参考信号的发送方法及系统
EP2741438A2 (fr) * 2012-12-10 2014-06-11 Hitachi Ltd. Système de réseau, appareil côté station et procédé de commande de communications
CN104506970A (zh) * 2014-12-22 2015-04-08 东南大学 基于光预编码的轮询式无源光网络光层检测方法
US20170070295A1 (en) * 2015-09-09 2017-03-09 Futurewei Technologies, Inc. Channel Bonding in Passive Optical Networks

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