WO2020019640A1 - 一种amcc信息的传输方法及系统 - Google Patents

一种amcc信息的传输方法及系统 Download PDF

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Publication number
WO2020019640A1
WO2020019640A1 PCT/CN2018/121887 CN2018121887W WO2020019640A1 WO 2020019640 A1 WO2020019640 A1 WO 2020019640A1 CN 2018121887 W CN2018121887 W CN 2018121887W WO 2020019640 A1 WO2020019640 A1 WO 2020019640A1
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Prior art keywords
interface data
amcc
information
wdm
pon
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PCT/CN2018/121887
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English (en)
French (fr)
Inventor
黄元波
刘新峰
刘登强
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Fiberhome Telecommunication Technologies Co Ltd
Wuhan Fisilink Microelectronics Technology Co Ltd
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Fiberhome Telecommunication Technologies Co Ltd
Wuhan Fisilink Microelectronics Technology Co Ltd
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Priority to BR112020016104-7A priority Critical patent/BR112020016104A2/pt
Publication of WO2020019640A1 publication Critical patent/WO2020019640A1/zh
Priority to PH12020551210A priority patent/PH12020551210A1/en
Anticipated expiration legal-status Critical
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0078Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H04L1/0083Formatting with frames or packets; Protocol or part of protocol for error control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/18Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q11/0067Provisions 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 in particular, to a method and system for transmitting auxiliary management and control channel (Auxiliary Management and Control Channel, AMCC) information.
  • auxiliary management and control channel Auxiliary Management and Control Channel, AMCC
  • the 5G fronthaul is an important part of the 5G network bearer.
  • the 5G Cloud-Radio Access Network (C-RAN) needs to support Enhanced Mobile Broadband (eMBB), Massive Machine-Machine- Three major application scenarios: Type Communications (mMTC), Ultra-Reliable and Low-latency Communications (URLLC).
  • eMBB Enhanced Mobile Broadband
  • mMTC Massive Machine-Machine- Three major application scenarios: Type Communications (mMTC), Ultra-Reliable and Low-latency Communications
  • URLLC Ultra-Reliable and Low-latency Communications
  • DU Distributed Node
  • CU Centralized Unit
  • the trend of pooled deployment is even more obvious.
  • the significant increase in 5G sites will lead to very tight fronthaul fiber resources from the antenna to the equipment room.
  • 5G fronthaul has very high requirements on access rate, delay, jitter, isolation and reliability.
  • High-speed 10G / 25G / 50G wavelength division multiplexing passive optical network (Wavelength, Division, Multiplex-Passive, Optical Network, WDM-PON)
  • the solution is based on Array Waveguide Grating (AWG) and point-to-multipoint physical networking architecture, supports multi-channel colorless and adjustable, each channel is based on Ethernet protocol transparent transmission, low-latency forwarding capability, and has high
  • AMG Array Waveguide Grating
  • point-to-multipoint physical networking architecture supports multi-channel colorless and adjustable, each channel is based on Ethernet protocol transparent transmission, low-latency forwarding capability, and has high
  • the power budget supports 10KM deployment scenarios, which can provide services with high-security, high-reliability, low-latency, and low-jitter exclusive wavelength channels on the premise of saving fiber resources.
  • FIG. 1 shows the existing WDM-PON 5G fronthaul network architecture.
  • the WDM-PON point to multipoint is used between the DU and the remote radio unit (RRU).
  • Tree-type network topology connection WDM-PON optical line terminal (OLT) and CU connection, optical network unit (ONU) and RRU connection, using wavelength division multiplexing technology to achieve DU and RRU Transparent transmission.
  • the OLT equipment is a node for fronthaul service and midhaul service.
  • the OLT and the ONU may also include a remote node (Remote Node, RN).
  • RN remote node
  • AMCC information is needed to transmit wavelength designation, allocation information, and operation, management, and maintenance (OAM) data.
  • AMCC information is added to each wavelength in the downlink and uplink directions.
  • the WDM-PON system transparently transmits the bitstream payload and does not terminate any part of its frame structure. Therefore, AMCC information should be superimposed on the transmission bitstream payload and use the same wavelength as the payload.
  • AMCC information and payload data There is also very little mutual interference. This scenario is called Transparent AMCC (Transparent AMCC).
  • Transparent AMCC Transparent AMCC
  • the specific implementation of transparent AMCC includes a baseband over-modulation scheme and a radio-frequency modulation scheme. If the AMCC signal modulates the data signal by 10%, it will introduce a 1 dB optical power penalty and affect the transmission distance of the system.
  • an object of the present invention is to provide a method and system for transmitting AMCC information, which realizes the transmission of AMCC information without affecting the transmission of service data.
  • the invention provides a method for transmitting AMCC information, which is used for WDM-PON in a wavelength division multiplexing passive optical network to carry Ethernet signals, and includes:
  • the sending device identifies an idle unit from the received first service data stream
  • the sending end device converts the first service data stream into Ethernet PMA interface data, and then outputs the first MII interface data through the Ethernet PCS sublayer;
  • the WDM-PON and PMA interface data carry the AMCC information to be transmitted after replacing the idle unit.
  • the first MII interface data is converted into 64B / 66B interface data, and then the 64B / 66B interface data is converted into the WDM-PON PMA interface data, where when the first MII When the interface data transmits an idle unit, the 64B / 66B interface data carries the AMCC information to be transmitted.
  • the second MII interface data is obtained by performing control information extraction processing on the first MII interface data, and then the second MII interface data is converted into the 64B / 66B interface data, where the control information
  • the extraction process includes extracting a specified control character from the first MII interface data and backfilling idle characters.
  • the second MII interface data is obtained by performing control information extraction processing on the first MII interface data, and then the second MII interface data is converted into the WDM-PON and PMA interface data, where the control
  • the information extraction process includes extracting a specified control character from the first MII interface data and backfilling idle characters.
  • the second MII interface data is converted into 64B / 66B interface data, and then the 64B / 66B interface data is converted into the WDM-PON PMA interface data, where when the first MII When the interface data transmits an idle unit, the 64B / 66B interface data carries the AMCC information to be transmitted.
  • the specified control characters include LPI and SEQUENCE control codes.
  • the 64B / 66B interface data includes a synchronization header and an encoding block.
  • the synchronization header indicates that the encoding block is a control code block and the control code block carries a specified codeword identifier, the control code block is indicated. Carries AMCC information to be transmitted.
  • the designated codeword identifier is 1 byte
  • the total number of bytes of AMCC information to be transmitted in the coding block is n , 4 ⁇ n ⁇ N-1.
  • the 64B / 66B interface data includes a synchronization header and an encoding block
  • the coding block includes eight bytes D0 to D7, where D0 is a codeword identifier, and when the synchronization header indicates that the coding block is a control code block, D0 is a designated codeword identifier, including:
  • D0 is the first codeword identifier, and D4D5D6D7 carries the AMCC information to be transmitted;
  • D0 is the second codeword identifier, and D3D4D5D6D7 carries the AMCC information to be transmitted;
  • D0 is the third codeword identifier, and D2D3D4D5D6D7 carries the AMCC information to be transmitted;
  • D0 is the fourth codeword identifier, and D1D2D3D4D5D6D7 carries the AMCC information to be transmitted;
  • D0 is the fifth codeword identifier, and D1D2D3D4D5D6D7 carries the AMCC information to be transmitted;
  • the first codeword identifier to the fourth codeword identifier all indicate that D0 is the end byte in the second MII interface data being converted, and other bytes between D0 and AMCC information are the ones before the end byte.
  • Data byte; the fifth codeword identifier indicates that the converted second MII interface data are all idle characters.
  • the first service data stream is an eCPRI signal.
  • the invention also provides a method for transmitting AMCC information for WDM-PON in a wavelength division multiplexed passive optical network, which includes:
  • the receiving device identifies and extracts AMCC information from the received second service data stream
  • the data unit carrying the AMCC information in the second service data stream is replaced with an idle unit and then sent outward.
  • the receiving device converts the second service data stream into WDM-PON and PMA interface data
  • the AMCC information carried by the WDM-PON and PMA interface data is taken out and backfilled with idle characters.
  • the WDM-PON PMA interface data is converted into 64B / 66B interface data, and then the 64B / 66B interface data is converted into the first MII interface data, where when the 64B / 66B interface data
  • the idle characters are backfilled after the AMCC information is extracted.
  • the 64B / 66B interface data is converted into the second MII interface data, and the second MII interface data is processed by writing control information to obtain the first MII interface data.
  • the control The information writing process includes replacing an idle character in the second MII interface data with a designated control character.
  • the WDM-PON PMA interface data is converted into second MII interface data, and the second MII interface data is processed by writing control information to obtain the first MII interface data.
  • the control information writing process includes replacing an idle character in the second MII interface data with a designated control character.
  • the WDM-PON PMA interface data is converted into 64B / 66B interface data, and then the 64B / 66B interface data is converted into the second MII interface data, wherein when the 64B / 66B interface data
  • the idle characters are backfilled after the AMCC information is extracted.
  • the specified control characters include LPI and SEQUENCE control codes.
  • the 64B / 66B interface data includes a synchronization header and an encoding block.
  • the synchronization header indicates that the encoding block is a control code block and the control code block carries a specified codeword identifier, the control code block is indicated. It carries the transmitted AMCC information.
  • the designated codeword identifier is 1 byte
  • the total number of bytes of AMCC information transmitted in the encoding block is n. 4 ⁇ n ⁇ N-1.
  • the 64B / 66B interface data includes a synchronization header and an encoding block
  • the coding block includes eight bytes D0 to D7, where D0 is a codeword identifier, and when the synchronization header indicates that the coding block is a control code block, D0 is a designated codeword identifier, including:
  • D0 is the first codeword identifier, and D4D5D6D7 carries the AMCC information transmitted;
  • D0 is the second codeword identifier, and D3D4D5D6D7 carries the AMCC information transmitted;
  • D0 is the third codeword identifier, and D2D3D4D5D6D7 bears the transmitted AMCC information;
  • D0 is the fourth codeword identifier, and D1D2D3D4D5D6D7 bears the transmitted AMCC information;
  • D0 is the fifth codeword identifier, and D1D2D3D4D5D6D7 bears the transmitted AMCC information;
  • the first codeword identifier to the fourth codeword identifier all indicate that D0 is the end byte in the second MII interface data obtained by conversion, and the other bytes between D0 and AMCC information are the data words before the end byte.
  • the fifth codeword identifier indicates that the second MII interface data obtained by the conversion are all idle characters.
  • the first service data stream is an eCPRI signal.
  • the invention also provides an AMCC information transmission system, which is set in a network device of a WDM-PON passive optical network WDM-PON, the system includes a transceiver module, a processing module, and an AMCC adaptation processing module;
  • the transceiver module is used to receive the service data stream and send the service data stream processed by the processing module;
  • the processing module is used to write the AMCC information to be transmitted into the idle unit in the received service data stream; it is also used to identify and extract the AMCC information from the service data stream carrying the AMCC information and backfill the idle characters;
  • the AMCC adaptation processing module is used to adapt the original AMCC data to obtain the AMCC information to be transmitted; it is also used to adapt the AMCC information extracted by the processing module.
  • the processing module includes:
  • Ethernet PCS sub-layer processing unit which is used to convert the Ethernet PMA interface data and the first MII interface data to each other;
  • a codec unit which is used to convert the first MII interface data and the WDM-PON PMA interface data to each other;
  • the Ethernet PMA interface data is obtained by converting the service data stream carrying the idle unit received by the transceiver module;
  • the WDM-PON and PMA interface data are converted from the service data stream carrying AMCC information received by the transceiver module, and the WDM-PON and PMA interface data carry AMCC information.
  • the codec unit includes:
  • a coordination processing unit configured to perform mutual conversion between the first MII interface data and 64B / 66B interface data, and the 64B / 66B interface data bears the transmitted AMCC information;
  • WDM-PON PCS sub-layer processing unit which is used for mutually converting the 64B / 66B interface data and the WDM-PON PMA interface data.
  • the processing module further includes a control information processing unit, and the control information processing unit is configured to notify the codec unit to extract and write a specified control character;
  • the coordination processing unit includes:
  • An Ethernet RS sub-layer processing unit configured to extract the specified control characters from the first MII interface data and backfill idle characters to obtain second MII interface data; and is further configured to integrate the second MII interface data into the second MII interface data Replacing the idle character with the designated control character to obtain the first MII interface data;
  • WDM-PON RS sub-layer processing unit which is used to perform mutual conversion between the second MII interface data and the 64B / 66B interface data.
  • the processing module further includes a control information processing unit, and the control information processing unit is configured to notify the codec unit to extract and write a specified control character;
  • the codec unit includes:
  • An Ethernet RS sub-layer processing unit configured to replace the specified control character in the first MII interface data with an idle character to obtain a second MII interface data; and is also used to idle the second MII interface data Replacing the characters with the specified control characters to obtain the first MII interface data;
  • a WDM-PON processing unit which is used to perform mutual conversion between the second MII interface data and the WDM-PON and PMA interface data.
  • the WDM-PON processing unit includes:
  • WDM-PON RS sub-layer processing unit which is used to convert the second MII interface data and 64B / 66B interface data to each other, and the 64B / 66B interface data carries the AMCC information transmitted;
  • WDM-PON PCS sub-layer processing unit which is used for mutually converting the 64B / 66B interface data and the WDM-PON PMA interface data.
  • the specified control characters include LPI and SEQUENCE control codes.
  • the 64B / 66B interface data includes a synchronization header and an encoding block.
  • the synchronization header indicates that the encoding block is a control code block and the control code block carries a specified codeword identifier, the control code block is indicated. Bears the transmitted AMCC information.
  • the designated codeword identifier is 1 byte
  • the total number of bytes of AMCC information transmitted in the encoding block is n. 4 ⁇ n ⁇ N-1.
  • the 64B / 66B interface data includes a synchronization header and an encoding block
  • the coding block includes eight bytes D0 to D7, where D0 is a codeword identifier, and when the synchronization header indicates that the coding block is a control code block, D0 is a designated codeword identifier, including:
  • D0 is the first codeword identifier, and D4D5D6D7 carries the AMCC information transmitted;
  • D0 is the second codeword identifier, and D3D4D5D6D7 carries the AMCC information transmitted;
  • D0 is the third codeword identifier, and D2D3D4D5D6D7 bears the transmitted AMCC information;
  • D0 is the fourth codeword identifier, and D1D2D3D4D5D6D7 bears the transmitted AMCC information;
  • D0 is the fifth codeword identifier, and D1D2D3D4D5D6D7 bears the transmitted AMCC information;
  • the first codeword identifier to the fourth codeword identifier all indicate that D0 is the end byte in the second MII interface data that is converted, and D0 and The other bytes between the AMCC information are data bytes before the end byte; the fifth codeword identifier indicates that the second MII interface data being converted are all idle characters;
  • the first codeword identifier to the fourth codeword identifier all indicate that D0 is the end byte in the second MII interface data obtained by the conversion, between D0 and AMCC information.
  • the other bytes are the data bytes before the end byte; the fifth codeword identifier indicates that the second MII interface data obtained by the conversion are all idle characters.
  • the first service data stream is an eCPRI signal.
  • Service data and AMCC information are independent of each other, not only does not affect the transmission of business data, and eliminates the loss introduced by transparent AMCC to the optical power budget. Reduce the complexity of optical device design, and make full use of bandwidth resources.
  • Ethernet physical coding sub-layer (PCS) is defined on the WDM-PON network.
  • the control coding of the PCS sub-layer is used to transmit AMCC information, and a new coding method is implemented, which is not only compatible with current
  • There is an Ethernet standard and the MAC layer of the 5G fronthaul signal is transparently transmitted, which reduces the complexity and delay of the network system to the greatest extent and is simple to implement.
  • the existing interfaces and functions of the Ethernet Reconciliation Sublayer are used to further reduce the difficulty of encoding and decoding and improve the reliability of the network system.
  • Figure 1 is the existing WDM-PON 5G fronthaul network architecture
  • FIG. 2 is a schematic diagram of a protocol layer structure of an AMCC information transmission method according to an embodiment of the present invention
  • FIG. 3 is a flowchart of sending AMCC information by a transmitting device according to the first embodiment of the present invention
  • step S220 in FIG. 4 The specific flowchart of step S220 in FIG. 4;
  • FIG. 6 is a schematic diagram of an AMCC information transmission system according to an eighth embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an AMCC information transmission system according to a tenth embodiment of the present invention.
  • the method for transmitting AMCC information provided by the embodiment of the present invention is used in a WDM-PON passive optical network WDM-PON.
  • a WDM-PON system generally allocates a pair of wavelengths to each ONU for uplink and downlink transmission, thereby providing A fixed point-to-point bidirectional connection between the OLT and each ONU.
  • AMCC information is usually used for control and management, such as: ONU activation / registration / authorization, ONU optical module temperature, voltage, receiving and transmitting optical power, ONU alarm, etc.
  • Methods for transmitting AMCC information include:
  • the sending device identifies an idle unit from the received first service data stream, writes the AMCC information to be transmitted into the idle unit to obtain a second service data stream, and sends the second service data stream to the receiving device.
  • the receiving-end device identifies and extracts AMCC information from the received second service data stream, replaces the data unit carrying the AMCC information in the second service data stream with an idle unit, and sends it out.
  • the transmitting end device In the upstream direction, the transmitting end device is an ONU, and the receiving end device is an OLT; in the downstream direction, the transmitting end device is an OLT, and the receiving end device is a designated target ONU.
  • the first service data stream is Ethernet service data, and includes a wireless fronthaul interface signal in the WDM-PON5G fronthaul network architecture shown in FIG. 1.
  • the wireless fronthaul interface signals can include Common Public Radio Interface (CPRI) signals, enhanced-Common Public Radio Interface (eCPRI) signals, Next-Generation Fronthaul Interface (NGFI) ) Signal and so on.
  • CPRI Common Public Radio Interface
  • eCPRI enhanced-Common Public Radio Interface
  • NGFI Next-Generation Fronthaul Interface
  • the CPRI signal can be received from the BBU or RRU, and the encoding format of the CPRI signal uses 8B / 10B encoding.
  • the eCPRI signal is a universal wireless interface used for 5G fronthaul. This interface uses mainstream Ethernet transmission interfaces. Currently, 10GBASE-R-SR / LR / ER, 10GBASE-R-LRM, and 25GBASE-R-SR are commonly used interfaces.
  • the eCPRI protocol layer data is carried through the IP network and transmitted through the Ethernet interface.
  • the service data stream includes a packet gap (Interpacket Gap, IPG), such as an Ethernet packet service data stream.
  • IPG can be an idle unit (Idle), with multiple data formats, such as idle packets at the Media Access Control (MAC) layer or above, and Media Independent Independent Interface (MII) idle bytes. Free code blocks in the physical layer coding format.
  • MAC Media Access Control
  • MII Media Independent Independent Interface
  • the idle unit (Idle) of the IPG with no packet gap is used to transmit the auxiliary management and control channel AMCC information.
  • the service data and AMCC information are independent of each other, which not only does not affect the transmission of service data, realizes transparent AMCC, and eliminates transparent AMCC to The loss introduced by the power budget reduces the complexity of optical device design and makes full use of bandwidth resources.
  • the following specifically describes the sending end device sending AMCC information and the receiving end device receiving AMCC information.
  • the sending end device sends the AMCC information including the following steps:
  • the transmitting device After the transmitting device converts the first service data stream into Ethernet PMA interface data, it outputs the first MII interface data through the Ethernet PCS sublayer.
  • the first MII interface data is converted into WDM-PON and PMA interface data according to a preset encoding rule and then sent out.
  • the WDM-PON and PMA interface data carry the AMCC information to be transmitted after replacing the idle unit.
  • the AMCC information to be transmitted is obtained by adapting the original AMCC data.
  • the physical layer includes an RS sublayer, a PCS sublayer, a physical medium connection sublayer (PMA), and a coordinated physical medium dependent sublayer (PMD) from top to bottom.
  • the RS sublayer and the PCS sublayer are connected through a MII interface, and the MII interface is divided into 10G media independent interface (XGMII), 25G media independent interface (25GMII), and 40G media independent interface according to the physical interface rate. (40Gbps Media Independent Interface, XLGMII), etc.
  • the PMA sublayer and the PCS sublayer may further include a forward error correction sublayer (Forward Error Correction, FEC).
  • FEC Forward Error Correction
  • the transmitting device may use the existing physical layer of the PMD sublayer, the PMA sublayer (and the FEC sublayer), and the PCS sublayer to sequentially encode the received service data stream to obtain the first MII interface data, and the first MII
  • the interface data is a code block output by the Ethernet physical coding sub-layer PCS.
  • the coding method can be 64B / 66B or other coding methods, such as coding methods that may appear in the future.
  • the Ethernet physical coding PCS sublayer is defined on the WDM-PON network.
  • the control coding of the PCS sublayer is used to transmit AMCC information, and a new coding method above the physical layer device (PHY) is realized, which is not only compatible
  • PHY physical layer device
  • the receiving device receives the AMCC information and the sending device sends the AMCC information in the opposite process, including the following steps:
  • the receiving end device converts the second service data stream into WDM-PON and PMA interface data.
  • the WDM-PON PMA interface data is converted into the first MII interface data according to a preset decoding rule, and then sent out through the Ethernet PCS sublayer.
  • the WDM-PON and PMA interface data carry AMCC information
  • the AMCC information is extracted and the data unit carrying the AMCC information is rewritten as an idle unit.
  • FIG. 2 is a schematic diagram of a protocol layer structure of an AMCC information transmission method according to an embodiment of the present invention.
  • the AMCC channel information can theoretically be placed in the FEC sublayer in FIG.
  • the difference from the PMA layer will correspond to different FEC algorithms, and different FEC algorithms need to be redefined and standardized.
  • a WDM-PON bearer is used, and the MAC layer of the 5C fronthaul signal is transparently transmitted over WDM-PON.
  • the WDM-PON RS sublayer and PCS sublayer interfaces use the control coding of the PCS sublayer to transfer management and control channel information, which has the following obvious technical effects:
  • this method and device eliminates the loss introduced by the Transparent AMCC transparent auxiliary management and control channel to the optical power budget, and reduces the complexity of optical device design.
  • embodiments of the present invention may not enable FEC, thereby reducing end-to-end delay (such as good line conditions, (If the distance is short, FEC can be disabled to reduce the delay).
  • the AMCC information transmission solution of the embodiment of the present invention is insensitive to the PMD, PMA, and FEC sublayers between the ONU and the OLT, and can be adapted to various transmission media.
  • the method for transmitting AMCC information in the embodiment of the present invention is used for WDM-PON in a wavelength division multiplexing passive optical network to carry Ethernet signals, and is compatible with CPRI, eCPRI, NGFI, and subsequent Ethernet types.
  • a 5G fronthaul WDM-PON network is taken as an example for specific description.
  • the first embodiment of the present invention provides an auxiliary management and control channel signal transmission method. As shown in FIG. 3, the sending end device sends AMCC information including the following steps:
  • the transmitting device converts the first service data stream into the Ethernet PMA interface data, it outputs the first MII interface data through the Ethernet PCS sublayer.
  • the first MII interface data is converted into WDM-PON and PMA interface data according to a preset coding rule, and the coding rule includes a coordinated coding rule and a WDM-PON PCS sub-layer coding rule.
  • the WDM-PON and PMA interface data carry the AMCC information to be transmitted after replacing the idle unit.
  • the AMCC information to be transmitted is obtained by adapting the original AMCC data.
  • the request for sending AMCC information identify whether the first MII interface data transmits idle bytes. If so, replace the idle bytes with AMCC information to obtain 64B / 66B interface data according to the coordinated coding rules; if not, retain them. Free bytes and get 64B / 66B interface data.
  • the 64B / 66B interface data includes a synchronization header and an encoding block.
  • the synchronization header indicates that the encoding block is a control code block and the control code block carries a designated codeword identifier, it indicates that the control code block carries the AMCC information to be transmitted.
  • the 64B / 66B interface data is converted into WDM-PON and PMA interface data and sent outward.
  • WDM-PON PCS sublayer coding rules are used to output 64B / 66B interface data through WDM-PON PCS sublayer as WDM-PON PMA interface data.
  • the sending device is the ONU.
  • the eCPRI fronthaul interface of the ONU receives the eCPRI signal as the first service data stream.
  • the interface is described as an example.
  • the eCPRI signal is a 10G / 25G Ethernet PMA_RX signal, which is a non-return to zero (NRZ) binary code output from the Ethernet PMA sublayer.
  • step S110 the output signal obtained after the 10G / 25G Ethernet PMA_RX signal undergoes 64B / 66B encoding processing on the Ethernet PCS sublayer is the first MII interface data.
  • 64B / 66B PCS sublayer coded data block refer to the definition of 49.2.4.3 Block structure in IEEE 802.3-2015.
  • the signal input from the 10G / 25G Ethernet PMA sub-layer passes the 25G / 10G Ethernet PCS sub-layer.
  • This 25G / 10G Ethernet PCS sub-layer is a dual-rate Ethernet PCS sub-layer, and the output conforms to 25GBASE- The 25GMII signal of the RPCS sublayer standard.
  • the signal of the first MII interface data is defined as follows:
  • ETH_RX_CLK The clock of input data. It is 390.625MHz ⁇ 100ppm in 25G mode and 156.625MHz ⁇ 100ppm in 10G mode. On the rising edge of the clock, both ETHPCS_RXD ⁇ 63: 0> and ETHPCS_RXC ⁇ 7: 0> transition.
  • the above signal group can also be defined in the following format:
  • the upper and lower signals of ETHPCS_RX_CLK are valid data. This data structure and the above description belong to the same data structure definition and carry the same amount of information. For details, see IEEE 802.3- 2015_SECTION4 Table 46-2-Transmit and receive associations
  • ETHPCS_RXC ⁇ 7: 0> are all 1 and ETHPCS_RXD ⁇ 63: 0> 8 sets of lanes are all 0x07, that is, the first MII interface data contains the first Free bytes in a service data stream.
  • step S120 the first MII interface data is converted into 64B / 66B interface data according to the coordinated encoding rule.
  • the 64B / 66B interface data includes a synchronization header and an encoding block.
  • the encoding block is a data block (D0D1D2D3D4D5D6D7); when the synchronization header is 10, the encoding block is a control block.
  • the 64B / 66B interface data includes:
  • code 01 indicates that WDMRS_TXD ⁇ 63: 0> is a data block
  • code 10 indicates that WDMRS_TXD ⁇ 63: 0> is a control block.
  • ETH_RX_CLK Clock of input data.
  • the AMCC information to be transmitted is constructed as a complete 64B / 66B WDM-PON PCS sub-layer coding block.
  • the sync header is 10, and D0 in the coding block is the specified codeword identifier.
  • AMCC information This and other examples are detailed in Table 3 below.
  • the Ethernet PCS sub-layer is defined on the WDM-PON network.
  • the control coding of the PCS sub-layer is used to transmit AMCC information, and a new encoding method is implemented, which is not only compatible with the existing Ethernet standard, but also transparently transmits the MAC of the 5G fronthaul signal. Layer, to reduce the complexity and delay of the network system to the greatest extent, and the implementation is simple.
  • step S130 the WDM-PON and PCS sublayer processes the 64B / 66B interface data to obtain the WDM-PON and PMA interface data, that is, the 10G / 25G PON and PMA_TX signals.
  • PCS Physical Coding Sublayer
  • the WDM-PON PCS sublayer processing process and FEC sublayer processing process are consistent with the 10GBASE-R definition.
  • the WDM-PON PCS sublayer processing process and FEC sublayer processing process are consistent with the 25GBASE-R definition.
  • the second embodiment of the present invention provides a method for transmitting auxiliary management and control channel signals.
  • the sending device sends AMCC information including the following steps:
  • the transmitting device converts the first service data stream into the Ethernet PMA interface data, it outputs the first MII interface data through the Ethernet PCS sublayer.
  • Step S210 is the same as step S110, and is not repeated here.
  • Coding rules include Ethernet RS sublayer coding rules and WDM-PON coding rules
  • the second MII interface data is obtained after performing control information extraction processing on the first MII interface data, where the control information extraction processing includes extracting specified control characters from the first MII interface data and Backfill idle characters.
  • the specified control characters include LPI and SEQUENCE control codes.
  • step S220 for the input signals ETHPCS_RXC ⁇ 7: 0> and ETHPCS_RXD ⁇ 63: 0> (that is, the first MII interface data), according to the conversion relationship between the first MII interface data and the second MII interface data in Table 1. Recognize because the wireless fronthaul signal is a complete MAC signal. In the input data stream, identify the START code (data stream start position code: start character) and TERMINATE (data stream end position code: end character). The preamble signals are completely identified for subsequent processing.
  • START code data stream start position code: start character
  • TERMINATE data stream end position code: end character
  • the relevant indication signal is sent out, and the byte is filled as an idle code (Idle).
  • the second MII interface data includes:
  • ETHRS_TXD ⁇ 63 0>: It is divided into 8 groups of lanes, each group of lanes is 8 bits, corresponding to a complete byte.
  • the ETHRS_TXC ⁇ 1> bit indicates the attribute of ETHRS_TXD ⁇ 15: 8>, the lane1 attribute is defined, and so on.
  • ETH_RX_CLK Clock of input data.
  • FIG. 4 shows a specific flowchart of step S220:
  • step S221. According to the control signal ETHPCS_RXC ⁇ 7: 0> in the first MII interface data, determine whether each channel (lane) of the data signal ETHPCS_RXD ⁇ 63: 0> is a control attribute. If not, proceed to step S222; if yes, proceed to step S223 .
  • S222 outputs ETHPCS_RXD ⁇ 63: 0> to the data signal ETHRS_TXD ⁇ 63: 0> of the second MII interface data, and assigns ETHRS_TXC ⁇ 7: 0> to 0 (ie, data attributes), and ends.
  • S223 identifies the type of the data signal ETHPCS_RXD ⁇ 63: 0> in each lane.
  • Table 1 Conversion relationship between the first MII interface data and the second MII interface data (the processing method of 25G / 10G Ethernet RS under different input patterns)
  • ETHRS_TXC ⁇ 0> / ETHRS_TXC ⁇ 4> corresponds to lane0 defined by the 802.3-2015 standard 46.1.6 XGMII structure
  • ETHRS_TXC ⁇ 1> / ETHRS_TXC ⁇ 5> corresponds to lane1 defined by the 802.3-2015 standard 46.1.6 XGMII structure
  • ETHRS_TXC ⁇ 2> / ETHRS_TXC ⁇ 6> corresponds to lane2 defined by the 802.3-2015 standard 46.1.6 XGMII structure
  • ETHRS_TXC ⁇ 3> / ETHRS_TXC ⁇ 7> corresponds to lane3 defined by the 802.3-2015 standard 46.1.6 XGMII structure.
  • the SEQUENCE field outputs LPI_IND information and SEQUENCE_IND information, respectively, and ETHRS_TXD outputs an idle code.
  • the corresponding transmission error code is output in ETHRS_TXD, and the transmission error_ind (transmission error) information is output.
  • ETHPCS_RXC 1, 0x07 (Idle) idle code encoding is output in ETHRS_TXD. This code indicates that no valid information is carried on ETHRS_TXD at this time. Can be used for AMCC information transfer.
  • ETHRS_TXD For TERMINATE and START codes, the output of ETHRS_TXD is still TERMINATE and START codes.
  • the second MII interface data output in step S220 is shown in Table 2, and the coding rules are described in the subsequent embodiments.
  • Table 2 Coding definition of the second MII interface data (25G / 10G WDM-PON RS input coding definition)
  • D0_IN corresponds to ⁇ 7: 0> of input ETHRS_TXD ⁇ 63: 0>
  • D1_IN corresponds to ⁇ 15: 7> of ETHRS_TXD ⁇ 63: 0>
  • any indicates 0x00 to oxFF encoding
  • T indicates TERMINATE encoding 0XFD
  • S indicates START encoding 0XFB
  • OTHER: indicates encoding definitions not included in this table
  • Idle indicates encoding 0X07.
  • step S230 the second MII interface data (ETHRS_TXD ⁇ 63: 0>, ETHRS_TXC ⁇ 7: 0>, and ETH_RX_CLK) output in step S220 is converted into WDM-PON PMA interface data, and WDM-PON PMA interface data is 10G / 25G PON PMA_TX signal.
  • WDM-PON PMA interface data is 10G / 25G PON PMA_TX signal.
  • the third embodiment of the present invention provides a method for transmitting auxiliary management and control channel signals.
  • the sending device sends AMCC information including the following steps:
  • the transmitting device converts the first service data stream into the Ethernet PMA interface data, it outputs the first MII interface data through the Ethernet PCS sublayer.
  • Step S310 is the same as step S110, and details are not described herein again.
  • Coding rules include Ethernet RS sub-layer coding rules, WDM-PON coordinated RS sub-layer coding rules, and WDM-PON PCS sub-layer coding rules.
  • the second MII interface data is obtained by performing control information extraction processing on the first MII interface data, where the control information extraction processing includes extracting a specified control character from the first MII interface data and Backfill idle characters.
  • the second MII interface data output in step S320 includes: ETHRS_TXD ⁇ 63: 0>, ETHRS_TXC ⁇ 7: 0>, and ETH_RX_CLK.
  • Step S320 is the same as step S220, and details are not described herein again.
  • the second MII interface data is converted into 64B / 66B interface data.
  • the 64B / 66B interface data is converted into WDM-PON and PMA interface data and sent outward.
  • Step S340 is the same as step S130, and details are not described herein again.
  • step S330 the obtained 64B / 66B interface data includes:
  • code 01 indicates that WDMRS_TXD ⁇ 63: 0> is a data block
  • code 10 indicates that WDMRS_TXD ⁇ 63: 0> is a control block.
  • ETH_RX_CLK Clock of input data.
  • WDM-PON RS sublayer coding rules include coding rules 1, 2, 3.1-3.8, and 4.1-4.2, as shown in Tables 2 and 3.
  • the second MII interface data output in step S320 and the AMCC signal to be transmitted are identified, and a corresponding coding rule is selected.
  • Coding rule 1 The corresponding input data stream is all data attributes
  • Encoding rule 2.1 The corresponding input data streams are all control attributes and encode Idle attributes;
  • Encoding rule 3.1 The corresponding input data stream contains 7 data attribute fields and one control attribute field: TERMINATE encoding;
  • Encoding rule 3.2 The corresponding input data stream contains six data attribute fields and one control attribute field: TERMINATE encoding;
  • Encoding rule 3.8 The corresponding input data stream contains a control attribute field: TERMINATE encoding, which is used to indicate the end of the data attribute field passed by the previous clock;
  • Encoding rule 4.1 The corresponding input data stream contains a control attribute field at position D0: START encoding, subsequent D1, D2, D3, D4, D4, D5, D7 are all data attributes;
  • Encoding rule 4.2 The corresponding input data stream contains a control attribute field at position D4: START encoding, subsequent D4, D4, D5, and D7 are data attributes.
  • Table 3 Coding definition of 64B / 66B interface data (25G / 10G WDM-PON RS coding rule definition)
  • D0_IN corresponds to ⁇ 7: 0> of input ETHRS_TXD ⁇ 63: 0>
  • D1_IN corresponds to ⁇ 15: 7> of ETHRS_TXD ⁇ 63: 0>
  • the D0 value of coding rules 2-4 can also be configured as other unique coding according to requirements.
  • the total number of bytes of the coding block is N
  • the designated codeword identifier is 1 byte
  • the total number of bytes of the AMCC information to be transmitted in the coding block is n, 4 ⁇ n ⁇ N-1.
  • the 64B / 66B interface data includes a synchronization header and an encoding block
  • the coding block includes eight bytes D0 to D7, where D0 is a codeword identifier, and when the synchronization header indicates that the coding block is a control code block, D0 is a designated codeword identifier, including:
  • D0 is the first codeword identifier, and D4D5D6D7 carries the AMCC information transmitted;
  • D0 is the second codeword identifier, and D3D4D5D6D7 carries the AMCC information transmitted;
  • D0 is the third codeword identifier, and D2D3D4D5D6D7 bears the transmitted AMCC information;
  • D0 is the fourth codeword identifier, and D1D2D3D4D5D6D7 bears the transmitted AMCC information;
  • D0 is the fifth codeword identifier, and D1D2D3D4D5D6D7 bears the transmitted AMCC information;
  • the first codeword identifier to the fourth codeword identifier all indicate that D0 is the end byte, D0 and AMCC information in the converted second MII interface data.
  • the other bytes in between are the data bytes before the end byte; the fifth codeword identifier indicates that the converted second MII interface data are all idle characters.
  • the first codeword identifier to the fourth codeword identifier all indicate that D0 is the end byte in the second MII interface data obtained by the conversion, between D0 and AMCC information.
  • the other bytes are the data bytes before the end byte; the fifth codeword identifier indicates that the second MII interface data obtained by the conversion are all idle characters.
  • step S330 includes:
  • S331 recognizes the ETHRS_TXD ⁇ 63: 0> and ETHRS_TXC signals.
  • D0 is replaced with the specified codeword identifier according to the data format defined in Table 3, and the AMCC information is written into the idle byte Idle and the data is output.
  • the second MII interface data is converted into 64B / 66B interface data as follows:
  • WDMRS_TXD ⁇ 63: 8> ⁇ AMCC data
  • WDMRS_SYNC ⁇ 1: 0> ⁇ "10", the process ends.
  • the second MII interface data is converted into 64B / 66B interface data as follows:
  • WDMRS_SYNC ⁇ 1: 0> ⁇ "10", the process ends.
  • the second MII interface data is converted into 64B / 66B interface data as follows:
  • WDMRS_SYNC ⁇ 1: 0> ⁇ "10", the process ends.
  • the second MII interface data is converted into 64B / 66B interface data as follows:
  • WDMRS_TXD ⁇ 7: 0> ⁇ 0X9C (that is, replace 0X99 with 0X9C)
  • WDMRS_SYNC ⁇ 1: 0> ⁇ "10", the process ends.
  • the second MII interface data is converted into 64B / 66B interface data as follows:
  • WDMRS_TXD ⁇ 7: 0> ⁇ 0X86 (that is, replace 0X87 with 0X86)
  • WDMRS_TXD ⁇ 63: 8> ⁇ AMCC data
  • WDMRS_SYNC ⁇ 1: 0> ⁇ "10", the process ends.
  • a fourth embodiment of the present invention provides an auxiliary management and control channel signal transmission method.
  • a receiving end device receiving AMCC information includes the following steps:
  • the receiving end device converts the second service data stream into WDM-PON and PMA interface data.
  • WDM-PON PMA interface data can be 10G / 25G PON PMA_RX.
  • Decoding rules include WDM-PON PCS sublayer decoding rules and coordinated decoding rules.
  • S420 converts WDM-PON PMA interface data into 64B / 66B interface data according to the WDM-PON PCS sublayer decoding rules.
  • the 64B / 66B interface data includes a synchronization header and an encoding block.
  • the synchronization header indicates that the encoding block is a control code block and the control code block carries a designated codeword identifier, it indicates that the control code block carries AMCC information to be transmitted.
  • the 64B / 66B interface data includes WDMRS_RXD ⁇ 63: 0>, WDMRS_RX_SYNC [1: 0], and WDMRS_RX_CLK.
  • S430 converts the 64B / 66B interface data to the first MII interface data and sends it out according to the coordinated decoding rules.
  • the 64B / 66B interface data carries AMCC information
  • the AMCC information is extracted and the idle characters are backfilled.
  • the first MII interface data includes ETHPCS_TXD ⁇ 63: 0>, ETHPCS_TXC ⁇ 7: 0>, and WDM_RX_CLK.
  • the fourth embodiment of the present invention is the reverse process of the first embodiment.
  • the fourth embodiment is the reverse process of the first embodiment.
  • a fifth embodiment of the present invention provides a method for transmitting auxiliary management and control channel signals.
  • the receiving device receives AMCC information including the following steps:
  • the S510 receiving end device converts the second service data stream into WDM-PON and PMA interface data.
  • Decoding rules include WDM-PON decoding rules and Ethernet RS sublayer decoding rules.
  • S520 converts WDM-PON PMA interface data into second MII interface data according to WDM-PON decoding rules.
  • the second MII interface data includes WDM_RS_TXD ⁇ 63: 0>, WDM_RS_TXC ⁇ 7: 0>, and WDM_RX_CLK.
  • S530 performs control information write processing on the second MII interface data according to the Ethernet RS sublayer decoding rule to obtain the first MII interface data and sends it out, wherein the control information write processing includes idle the second MII interface data.
  • the characters are replaced with the specified control characters.
  • the fifth embodiment of the present invention is the reverse process of the second embodiment.
  • the fifth embodiment refer to the description of the second embodiment, and details are not described herein again.
  • a sixth embodiment of the present invention provides a method for transmitting auxiliary management and control channel signals.
  • the receiving end device receiving AMCC information includes the following steps:
  • the S610 receiving end device converts the second service data stream into WDM-PON and PMA interface data.
  • Decoding rules include WDM-PON PCS sublayer decoding rules, WDM-PON RS sublayer decoding rules, and Ethernet RS sublayer decoding rules.
  • the S620 converts WDM-PON PMA interface data into 64B / 66B interface data according to the WDM-PON PCS sublayer decoding rules.
  • the 64B / 66B interface data includes a synchronization header and an encoding block.
  • the synchronization header indicates that the encoding block is a control code block and the control code block carries a designated codeword identifier, it indicates that the control code block carries AMCC information to be transmitted.
  • S630 converts the 64B / 66B interface data into the second MII interface data according to the WDM-PON RS sublayer decoding rules.
  • the 64B / 66B interface data carries AMCC information
  • the AMCC information is extracted and backfilled with idle characters.
  • S640 performs control information write processing on the second MII interface data according to the Ethernet RS sublayer decoding rule to obtain the first MII interface data and sends it out, wherein the control information write processing includes idle the second MII interface data.
  • the characters are replaced with the specified control characters.
  • the sixth embodiment of the present invention is the reverse process of the third embodiment.
  • the sixth embodiment is the reverse process of the third embodiment.
  • the seventh embodiment of the present invention further provides an AMCC information transmission system, which is set in a network device of a wavelength division multiplexing passive optical network WDM-PON, and a transmitting end device and a receiving end device transmit and receive bidirectionally.
  • the AMCC information transmission system includes a transceiver module, an AMCC adaptation processing module, and a processing module, and is configured to implement the AMCC information transmission method in the foregoing embodiments.
  • the transceiver module is used to receive the service data stream and send the service data stream processed by the processing module.
  • the processing module is used to write the AMCC information to be transmitted into the idle unit in the received service data stream; it is also used to identify and extract the AMCC information from the service data stream carrying the AMCC information and backfill the idle characters.
  • the AMCC adaptation processing module is used to adapt the original AMCC data to obtain the AMCC information to be transmitted; it is also used to adapt the AMCC information extracted by the processing module.
  • the processing module includes an Ethernet PCS sub-layer processing unit and a codec unit.
  • the Ethernet PCS sub-layer processing unit is configured to perform mutual conversion between the Ethernet PMA interface data and the first MII interface data.
  • the codec unit is used to perform mutual conversion between the first MII interface data and the WDM-PON and PMA interface data.
  • the Ethernet PMA interface data is obtained by converting the service data stream carrying the idle unit received by the transceiver module;
  • the WDM-PON and PMA interface data are converted from the service data stream carrying AMCC information received by the transceiver module, and the WDM-PON and PMA interface data carry AMCC information.
  • a WDM-PON 5G fronthaul network includes a transmitting device and a receiving device, and both the transmitting device and the receiving device are provided with a transmission system for AMCC information.
  • a transceiver module receives a first service data stream with an idle unit, the first service data stream is converted into Ethernet PMA interface data, and the AMCC adaptation processing module converts the original AMCC data Adaptation processing is performed to obtain the AMCC information to be transmitted.
  • the processing module writes the AMCC information to be transmitted into the idle unit in the Ethernet PMA interface data to obtain a second service data stream, and then sends the second service data stream to the receiving end device through the transceiver module.
  • the transmission system provided on the receiving end device receives and transmits a second service data stream from the transmitting end device, and converts the second service data stream into WDM-PON and PMA interface data.
  • the AMCC is carried in the second service data stream.
  • Information, WDM-PON and PMA interface data carry AMCC information.
  • the processing module identifies and extracts the AMCC information from the WDM-PON and PMA interface data, backfills the idle characters, and sends it to the transceiver module, and sends the extracted AMCC information to the AMCC adaptation processing module for adaptation processing.
  • the first service data stream may be an eCPRI signal, which is described in detail below.
  • an eighth embodiment of the present invention provides an AMCC information transmission system.
  • the codec processing unit includes a coordination processing unit and a WDM-PON PCS sub-layer processing unit.
  • the coordination processing unit is configured to convert the first MII interface data and the 64B / 66B interface data to each other, and the 64B / 66B interface data carries AMCC information to be transmitted.
  • the 64B / 66B interface data includes a synchronization header and an encoding block.
  • the synchronization header indicates that the encoding block is a control code block and the control code block carries a designated codeword identifier, it indicates that the control code block carries the AMCC information to be transmitted.
  • the total number of bytes of the coding block is N
  • the designated codeword identifier is 1 byte
  • the total number of bytes of the AMCC information to be transmitted in the coding block is n, 3 ⁇ n ⁇ N-1.
  • the WDM-PON PCS sub-layer processing unit is used to convert the 64B / 66B interface data and WDM-PON PMA interface data to each other.
  • a ninth embodiment of the present invention provides an AMCC information transmission system.
  • the processing module further includes a control information processing unit.
  • the control information processing unit is configured to notify the codec unit to extract and write the specified control.
  • the characters include notifying the codec unit to insert the specified control characters in the data stream, and storing the specified control characters extracted by the codec unit from the data stream.
  • the specified control characters include LPI and SEQUENCE information. As shown in FIG.
  • LPI_IDLE_ind indicates that the control information processing unit has received LPI information
  • SEQUENCE_ind indicates that the control information processing unit has received SEQUNENCE information
  • LPI_IDLE_transmit indicates that the control information processing unit sends LPI information
  • SEQUENCE_transimit indicates that the control information processing unit sends SEQUENCE information.
  • the codec unit includes an Ethernet RS sub-layer processing unit and a WDM-PON processing unit.
  • the Ethernet RS sub-layer processing unit is used to extract the specified control characters from the first MII interface data and backfill the idle characters to obtain the second MII interface data; it is also used to replace the idle characters in the second MII interface data with the specified control characters Get the first MII interface data.
  • the WDM-PON processing unit is used to perform mutual conversion between the second MII interface data and the WDM-PON and PMA interface data.
  • a processing module includes an Ethernet PCS sub-layer processing unit, an Ethernet RS sub-layer processing unit, an Ethernet RS sub-layer processing unit, and a WDM- PON RS sub-layer processing unit and control information processing unit.
  • the control information processing unit is used to notify the codec unit to extract and write the specified control characters, including notifying the codec unit to insert the specified control characters in the data stream, and storing the specified control characters extracted by the codec unit from the data stream.
  • the specified control characters include LPI and SEQUENCE information.
  • the Ethernet PCS sub-layer processing unit is configured to perform mutual conversion between the Ethernet PMA interface data and the first MII interface data.
  • the Ethernet RS sub-layer processing unit is used to extract the specified control characters from the first MII interface data and backfill the idle characters to obtain the second MII interface data; it is also used to replace the idle characters in the second MII interface data with the specified control characters Get the first MII interface data.
  • the WDM-PON RS sub-layer processing unit is used to convert the second MII interface data and 64B / 66B interface data to each other.
  • the 64B / 66B interface data carries AMCC information to be transmitted.
  • the WDM-PON PCS sub-layer processing unit is used to convert the 64B / 66B interface data and WDM-PON PMA interface data to each other.
  • the fronthaul eCPRI interface of the ONU receives the eCPRI signal as the first service data stream.
  • 10GBASE-R-SR / LR / ER, 10GBASE-R-LRM, or 25GBASE-R-SR is commonly used.
  • the interface is described as an example as follows, as shown in Figure 7: (1) Direction for sending AMCC information:
  • the 25G / 10G Ethernet PCS sub-layer processing unit inputs 10G / 25G Ethernet PMA_RX signals from the Ethernet PMA interface; outputs the first MII interface data from the 25GMII interface to the Ethernet RS sublayer processing unit.
  • the first MII interface data includes the data signal ETHPCS_RXD ⁇ 63: 0>, control signal ETHPCS_RXC ⁇ 7: 0>, and clock ETH_RX_CLK of input data.
  • the 25G / 10G Ethernet RS sub-layer processing unit extracts LPI and SEQUENCE codes from the first MII interface data: LP_IDLE_ind and SEQUENCE_ind.
  • the second MII interface data includes the data signal ETHRS_TXD ⁇ 63: 0>, the control signal ETHRS_TXC ⁇ 7: 0>, and the clock of the input data ETH_RX_CLK.
  • the 25G / 10G WDM-PON RS sub-layer processing unit outputs 64B / 66B interface data from the 64B / 66B interface to the 25G / 10G WDM-PON PCS sub-layer processing unit.
  • the 64B / 66B interface data includes the coding block WDMRS_TXD ⁇ 63: 0>, Synchronization header WDMRS_TX_SYNC [1: 0] and clock signal ETH_RX_CLK.
  • the 25G / 10G WDM-PON PCS sub-layer processing unit inputs 64B / 66B interface data from the 64B / 66B interface, outputs WDM-PON PMA interface data from the WDM-PON PMA interface, and WDM-PON PMA interface data is 10G / 25G PON PMA_TX.
  • WDM-PON PCS sub-layer processing unit inputs WDM-PON PMA interface data from WDM-PON PMA interface, WDM-PON PMA interface data is 10G / 25G PON PMA_RX; 64B / 66B interface outputs 64B / 66B interface data to WDM-PON RS sub-layer processing unit.
  • the 64B / 66B interface data includes the coding block WDMRS_RXD ⁇ 63: 0>, the synchronization header WDMRS_RX_SYNC [1: 0], and the clock signal WDMRS_RX_CLK.
  • the 25G / 10G WDM-PON RS sub-layer processing unit outputs the second MII interface data from the 25GMII interface to the 25GMII interface of the 25G / 10G Ethernet RS sub-layer processing unit.
  • the second MII interface data includes the data signals WDM_RS_TXD ⁇ 63: 0>, Control signals WDM_RS_TXC ⁇ 7: 0> and clock WDM_RX_CLK.
  • the 25G / 10G Ethernet RS sub-layer processing unit writes LPI and SEQUENCE codes: LP_IDLE_transmit and SEQUENCE_transmit to the second MII interface data.
  • the first MII interface data includes ETHPCS_TXD ⁇ 63: 0>, ETHPCS_TXC ⁇ 7: 0>, and WDM_RX_CLK.
  • the 25G / 10G Ethernet PCS sub-layer processing unit outputs a 10G / 25G Ethernet PMA_TX signal from the Ethernet PMA interface.
  • the AMCC signal transmission can refer to the first to sixth embodiments.
  • Ethernet PCS sub-layer processing unit, Ethernet RS sub-layer processing unit, WDM-PON RS sub-layer processing unit, and WDM-PON PCS sub-layer processing unit in FIG. 7 can be combined in any manner without limitation.

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Abstract

本发明公开了一种AMCC信息的传输方法及系统,涉及通信技术领域。本传输方法用于波分复用无源光网络WDM-PON承载以太网信号,其包括:发送端设备从收到的第一业务数据流中识别出空闲单元;将待传输的AMCC信息写入空闲单元后得到第二业务数据流,将第二业务数据流发往接收端设备。本发明业务数据和AMCC信息互相独立,不但不影响业务数据的传输,消除了透明AMCC对光功率预算引入的损耗,降低了光器件设计的复杂性,而且充分利用带宽资源。

Description

一种AMCC信息的传输方法及系统 技术领域
本发明涉及通信技术领域,具体是涉及一种辅助管理和控制通道(Auxiliary Management and Control Channel,AMCC)信息的传输方法及系统。
背景技术
5G前传是5G网络承载的重要组成部分,5G云无线接入网络(Cloud-Radio Access Network,C-RAN)需要支撑增强移动宽带(Enhanced Mobile Broad Band,eMBB)、大规模机器通信(Massive Machine-Type Communications,mMTC)、高可靠性低时延通信(Ultra-Reliable and Low-latency Communications,URLLC)三大应用场景,分布式节点(Distributed Unit,DU)/集中式节点(Central Unit,CU)集中池化部署的趋势更加明显,5G站点大幅增加,将导致从天线到机房的前传光纤资源非常紧张。5G前传对接入速率、时延、抖动、隔离及可靠性都有非常高的要求,高速10G/25G/50G波分复用无源光网络(Wavelength Division Multiplexing-Passive Optical Network,WDM-PON)解决方案,基于阵列波导光栅(Array Waveguide Grating,AWG)和点到多点的物理组网架构,支持多通道无色可调、每通道基于以太网协议透传、低时延转发能力,具备高功率预算支持10KM部署场景,可在节约光纤资源的前提下,为业务提供高安全、高可靠、低时延、低抖动的独享波长通道。
图1所示为现有的WDM-PON 5G前传网络架构,使用 WDM-PON网络承载5G前传信号时,DU和远端射频单元(Remote Radio Unit,RRU)之间基于WDM-PON点到多点树型网络拓扑连接,WDM-PON光线路终端(Optical Line Terminal,OLT)和CU连接,光网络单元(Optical Network Unit,ONU)和RRU连接,采用波分复用技术实现DU和RRU之间的透明传输,OLT设备是前传业务(Fronthaul)和中传业务(Midhaul)的节点,OLT与ONU之间还可以包括远端节点(Remote Node,RN)。
在WDM-PON承载网络中,需要AMCC信息来传输波长指定、分配信息和操作、管理、维护(Operation Administration and Maintenance,OAM)数据。AMCC信息加入到下行与上行方向的每一个波长中。WDM-PON系统透明传输比特流净荷,且不终结其帧结构的任意部分,所以AMCC信息应叠加至传输比特流净荷中,且使用与净荷相同的波长,同时AMCC信息与净荷数据之间也只有很小的互扰。这种场景即称为透明AMCC(Transparent AMCC)。透明AMCC的具体实现方式包括基带过调制方案和射频调制方案,如果AMCC信号对数据信号的调制深度为10%,则会引入1dB的光功率代价,影响系统的传输距离。
发明内容
针对现有技术中存在的缺陷,本发明的目的在于提供一种AMCC信息的传输方法及系统,实现了AMCC信息的传输,不影响业务数据的传输。
本发明提供一种AMCC信息的传输方法,用于波分复用无源光网络WDM-PON承载以太网信号,其包括:
发送端设备从收到的第一业务数据流中识别出空闲单元;
将待传输的AMCC信息写入空闲单元后得到第二业务数据流, 将第二业务数据流发往接收端设备。
在上述技术方案的基础上,发送端设备将所述第一业务数据流转换为以太网PMA接口数据后,通过以太网PCS子层输出第一MII接口数据;
将第一MII接口数据转换为WDM-PON PMA接口数据后向外发送;
其中,当第一MII接口数据传输空闲单元时,WDM-PON PMA接口数据承载对空闲单元进行替换后的待传输的AMCC信息。
在上述技术方案的基础上,将所述第一MII接口数据转换为64B/66B接口数据,再将64B/66B接口数据转换为所述WDM-PON PMA接口数据,其中,当所述第一MII接口数据传输空闲单元时,64B/66B接口数据承载待传输的AMCC信息。
在上述技术方案的基础上,对所述第一MII接口数据进行控制信息提取处理后得到第二MII接口数据,再将第二MII接口数据转换为所述64B/66B接口数据,其中,控制信息提取处理包括从所述第一MII接口数据中提取指定的控制字符并回填空闲字符。
在上述技术方案的基础上,对所述第一MII接口数据进行控制信息提取处理后得到第二MII接口数据,再将第二MII接口数据转换为所述WDM-PON PMA接口数据,其中,控制信息提取处理包括从所述第一MII接口数据中提取指定的控制字符并回填空闲字符。
在上述技术方案的基础上,将所述第二MII接口数据转换为64B/66B接口数据,再将64B/66B接口数据转换为所述WDM-PON PMA接口数据,其中,当所述第一MII接口数据传输空闲单元时,64B/66B接口数据承载待传输的AMCC信息。
在上述技术方案的基础上,所述指定的控制字符包括LPI和 SEQUENCE控制码。
在上述技术方案的基础上,所述64B/66B接口数据包括同步头和编码块,当同步头指示编码块为控制码块,且控制码块携带有指定的码字标识时,表示控制码块承载待传输的AMCC信息。
在上述技术方案的基础上,所述编码块的字节总数为N=8,所述指定的码字标识为1个字节,所述编码块中待传输的AMCC信息的字节总数为n,4≤n≤N-1。
在上述技术方案的基础上,所述64B/66B接口数据包括同步头和编码块;
所述编码块包括D0至D7八个字节,其中,D0为码字标识,当同步头指示编码块为控制码块时,D0为指定的码字标识,包括:
D0为第一码字标识,D4D5D6D7承载待传输的AMCC信息;
D0为第二码字标识,D3D4D5D6D7承载待传输的AMCC信息;
D0为第三码字标识,D2D3D4D5D6D7承载待传输的AMCC信息;
D0为第四码字标识,D1D2D3D4D5D6D7承载待传输的AMCC信息;
D0为第五码字标识,D1D2D3D4D5D6D7承载待传输的AMCC信息;
其中,第一码字标识至第四码字标识均表示D0为被转换的所述第二MII接口数据中的结束字节,D0和AMCC信息之间的其他字节为该结束字节前的数据字节;第五码字标识表示被转换的所述第二MII接口数据均为空闲字符。
在上述技术方案的基础上,所述第一业务数据流为eCPRI信号。
本发明还提供一种AMCC信息的传输方法,用于波分复用无源 光网络WDM-PON,其包括:
接收端设备从收到的第二业务数据流中识别并提取出AMCC信息;
将第二业务数据流中承载AMCC信息的数据单元替换为空闲单元后向外发送。
在上述技术方案的基础上,接收端设备将所述第二业务数据流转换为WDM-PON PMA接口数据;
将WDM-PON PMA接口数据转换为第一MII接口数据后,通过以太网PCS子层向外发送;
其中,WDM-PON PMA接口数据承载的AMCC信息被取出后回填空闲字符。
在上述技术方案的基础上,将所述WDM-PON PMA接口数据转换为64B/66B接口数据,再将64B/66B接口数据转换为所述第一MII接口数据,其中,当64B/66B接口数据承载AMCC信息时,提取AMCC信息后回填空闲字符。
在上述技术方案的基础上,将所述64B/66B接口数据转换为第二MII接口数据,再对第二MII接口数据进行控制信息写入处理后得到所述第一MII接口数据,其中,控制信息写入处理包括将所述第二MII接口数据中空闲字符替换为指定的控制字符。
在上述技术方案的基础上,将所述WDM-PON PMA接口数据转换为第二MII接口数据,再对第二MII接口数据进行控制信息写入处理后得到所述第一MII接口数据,其中,控制信息写入处理包括将所述第二MII接口数据中空闲字符替换为指定的控制字符。
在上述技术方案的基础上,将所述WDM-PON PMA接口数据转换为64B/66B接口数据,再将64B/66B接口数据转换为所述第二 MII接口数据,其中,当64B/66B接口数据承载AMCC信息时,提取AMCC信息后回填空闲字符。
在上述技术方案的基础上,所述指定的控制字符包括LPI和SEQUENCE控制码。
在上述技术方案的基础上,所述64B/66B接口数据包括同步头和编码块,当同步头指示编码块为控制码块,且控制码块携带有指定的码字标识时,表示控制码块承载了传输的AMCC信息。
在上述技术方案的基础上,所述编码块的字节总数为N=8,所述指定的码字标识为1个字节,所述编码块中传输的AMCC信息的字节总数为n,4≤n≤N-1。
在上述技术方案的基础上,所述64B/66B接口数据包括同步头和编码块;
所述编码块包括D0至D7八个字节,其中,D0为码字标识,当同步头指示编码块为控制码块时,D0为指定的码字标识,包括:
D0为第一码字标识,D4D5D6D7承载传输的AMCC信息;
D0为第二码字标识,D3D4D5D6D7承载传输的AMCC信息;
D0为第三码字标识,D2D3D4D5D6D7承载传输的AMCC信息;
D0为第四码字标识,D1D2D3D4D5D6D7承载传输的AMCC信息;
D0为第五码字标识,D1D2D3D4D5D6D7承载传输的AMCC信息;
其中,第一码字标识至第四码字标识均表示D0为转换得到的第二MII接口数据中的结束字节,D0和AMCC信息之间的其他字节为该结束字节前的数据字节;第五码字标识表示转换得到的第二MII接口数据均为空闲字符。
在上述技术方案的基础上,所述第一业务数据流为eCPRI信号。
本发明还提供一种AMCC信息的传输系统,设于波分复用无源光网络WDM-PON的网络设备中,所述系统包括收发模块、处理模块和AMCC适配处理模块;
收发模块用于接收业务数据流和发送处理模块处理后的业务数据流;
处理模块用于将待传输的AMCC信息写入收到业务数据流中的空闲单元;还用于从携带AMCC信息的业务数据流中识别并提取出AMCC信息后回填空闲字符;
AMCC适配处理模块用于将原始AMCC数据进行适配处理得到待传输的AMCC信息;还用于对处理模块提取的AMCC信息进行适配处理。
在上述技术方案的基础上,所述处理模块包括:
以太网PCS子层处理单元,其用于对以太网PMA接口数据和第一MII接口数据进行相互转换;
编解码单元,其用于对第一MII接口数据和WDM-PON PMA接口数据进行相互转换;
其中,以太网PMA接口数据由收发模块收到的携带空闲单元的业务数据流转换得到;
WDM-PON PMA接口数据由收发模块收到的携带AMCC信息的业务数据流转换得到,且WDM-PON PMA接口数据承载AMCC信息。
在上述技术方案的基础上,所述编解码单元包括:
协调处理单元,其用于对所述第一MII接口数据和64B/66B接口数据进行相互转换,64B/66B接口数据承载传输的AMCC信息;
WDM-PON PCS子层处理单元,其用于对64B/66B接口数据和所述WDM-PON PMA接口数据进行相互转换。
在上述技术方案的基础上,所述处理模块还包括控制信息处理单元,控制信息处理单元用于通知所述编解码单元提取和写入指定的控制字符;
所述协调处理单元包括:
以太网RS子层处理单元,其用于从所述第一MII接口数据中提取所述指定的控制字符并回填空闲字符得到第二MII接口数据;还用于将所述第二MII接口数据中所述空闲字符替换为所述指定的控制字符得到所述第一MII接口数据;
WDM-PON RS子层处理单元,其用于对第二MII接口数据和所述64B/66B接口数据进行相互转换。
在上述技术方案的基础上,所述处理模块还包括控制信息处理单元,控制信息处理单元用于通知所述编解码单元提取和写入指定的控制字符;
所述编解码单元包括:
以太网RS子层处理单元,其用于将所述第一MII接口数据中所述指定的控制字符替换为空闲字符得到第二MII接口数据;还用于将所述第二MII接口数据中空闲字符替换为所述指定的控制字符得到所述第一MII接口数据;
WDM-PON处理单元,其用于对第二MII接口数据和所述WDM-PON PMA接口数据进行相互转换。
在上述技术方案的基础上,所述WDM-PON处理单元包括:
WDM-PON RS子层处理单元,其用于对所述第二MII接口数据和64B/66B接口数据进行相互转换,64B/66B接口数据承载传输的 AMCC信息;
WDM-PON PCS子层处理单元,其用于对64B/66B接口数据和所述WDM-PON PMA接口数据进行相互转换。
在上述技术方案的基础上,所述指定的控制字符包括LPI和SEQUENCE控制码。
在上述技术方案的基础上,所述64B/66B接口数据包括同步头和编码块,当同步头指示编码块为控制码块,且控制码块携带有指定的码字标识时,表示控制码块承载传输的AMCC信息。
在上述技术方案的基础上,所述编码块的字节总数为N=8,所述指定的码字标识为1个字节,所述编码块中传输的AMCC信息的字节总数为n,4≤n≤N-1。
在上述技术方案的基础上,所述64B/66B接口数据包括同步头和编码块;
所述编码块包括D0至D7八个字节,其中,D0为码字标识,当同步头指示编码块为控制码块时,D0为指定的码字标识,包括:
D0为第一码字标识,D4D5D6D7承载传输的AMCC信息;
D0为第二码字标识,D3D4D5D6D7承载传输的AMCC信息;
D0为第三码字标识,D2D3D4D5D6D7承载传输的AMCC信息;
D0为第四码字标识,D1D2D3D4D5D6D7承载传输的AMCC信息;
D0为第五码字标识,D1D2D3D4D5D6D7承载传输的AMCC信息;
其中,由第二MII接口数据转为64B/66B接口数据时,第一码字标识至第四码字标识均表示D0为被转换的所述第二MII接口数据中的结束字节,D0和AMCC信息之间的其他字节为该结束字节前的 数据字节;第五码字标识表示被转换的所述第二MII接口数据均为空闲字符;
由64B/66B接口数据转为第二MII接口数据时,第一码字标识至第四码字标识均表示D0为转换得到的第二MII接口数据中的结束字节,D0和AMCC信息之间的其他字节为该结束字节前的数据字节;第五码字标识表示转换得到的第二MII接口数据均为空闲字符。
在上述技术方案的基础上,所述第一业务数据流为eCPRI信号。
与现有技术相比,本发明的优点如下:
(1)利用没有承载业务的空闲单元(Idle)传输辅助管理和控制通道AMCC信息,业务数据和AMCC信息互相独立,不但不影响业务数据的传输,消除了透明AMCC对光功率预算引入的损耗,降低了光器件设计的复杂性,而且充分利用带宽资源。
(2)在WDM-PON网络上定义了以太网物理编码子层(Physical Coding Sub-layer,PCS),利用PCS子层的控制编码传递AMCC信息,实现了一种新的编码方式,不但兼容现有以太网标准,而且透传5G前传信号的MAC层,最大程度地降低网络系统的复杂性和延时,实现简单。
(3)在PCS子层的基础上,利用现有的以太网协调子层(Reconciliation Sublayer,RS)的接口和功能,进一步降低编码和解码的难度,提高了网络系统的可靠性。
附图说明
图1是现有的WDM-PON 5G前传网络架构;
图2是本发明实施例提供的AMCC信息的传输方法的协议层结构示意图;
图3是本发明第一实施例发送端设备发送AMCC信息流程图;
图4步骤S220的具体流程图;
图5步骤S330的具体流程图;
图6是本发明第八实施例AMCC信息的传输系统示意图;
图7是本发明第十实施例AMCC信息的传输系统示意图。
具体实施方式
下面结合附图及具体实施例对本发明作进一步的详细描述。
本发明实施例提供的AMCC信息的传输方法,用于波分复用无源光网络WDM-PON,WDM-PON系统通常为每个ONU分配一对波长,分别用于上行和下行传输,从而提供了OLT到各ONU固定的虚拟点对点双向连接。在WDM-PON系统中进行通信时通常需要用AMCC信息进行控制管理,例如:ONU的激活/注册/授权、ONU光模块的温度、电压、接收发送光功率、ONU的告警等。
AMCC信息的传输方法包括:
发送端设备从收到的第一业务数据流中识别出空闲单元,将待传输的AMCC信息写入空闲单元后得到第二业务数据流,将第二业务数据流发往接收端设备。
接收端设备从收到的第二业务数据流中识别并提取出AMCC信息,将第二业务数据流中承载AMCC信息的数据单元替换为空闲单元后向外发送。
在上行方向,发送端设备为ONU,接收端设备为OLT;在下行方向,发送端设备为OLT,接收端设备为指定的目标ONU。
第一业务数据流是以太网业务数据,包括图1所示的WDM-PON5G前传网络架构中的无线前传接口信号。无线前传接口信号可以包括通用公共无线接口(Common Public Radio Interface,CPRI)信号、增强性通用公共无线接口(enhanced-Common Public Radio Interface, eCPRI)信号、下一代前传接口(Next-Generation Fronthaul Interface,NGFI)信号等。
例如,CPRI信号可以从BBU或RRU接收,CPRI信号的编码格式采用8B/10B编码。eCPRI信号是用于5G前传的一种通用无线接口,此接口使用主流的以太网传输接口,目前10GBASE-R-SR/LR/ER,10GBASE-R-LRM,25GBASE-R-SR为常用接口。eCPRI协议层数据通过IP网络承载,通过以太网接口传递。
业务数据流包含分组间隙(Interpacket Gap,IPG),例如以太网分组业务数据流。IPG可以为空闲单元(Idle),具有多种数据格式,例如媒质访问控制(Media Access Control,MAC)层或以上的空闲报文,媒质不相关接口(Media Independent Inteface,MII)空闲字节,具有物理层编码格式的空闲码块等。
利用没有承载业务的分组间隙IPG的空闲单元(Idle)传输辅助管理和控制通道AMCC信息,业务数据和AMCC信息互相独立,不但不影响业务数据的传输,实现了透明AMCC,消除了透明AMCC对光功率预算引入的损耗,降低了光器件设计的复杂性,而且充分利用带宽资源。
以下对发送端设备发送AMCC信息和接收端设备接收AMCC信息分别具体说明。
具体的,发送端设备发送AMCC信息包括以下步骤:
发送端设备将第一业务数据流转换为以太网PMA接口数据后,通过以太网PCS子层输出第一MII接口数据。
按照预设的编码规则将第一MII接口数据转换为WDM-PON PMA接口数据后向外发送。
其中,当第一MII接口数据传输空闲单元时,WDM-PON PMA 接口数据承载对空闲单元进行替换后的待传输的AMCC信息。待传输的AMCC信息是对原始AMCC数据进行适配处理得到的。
根据以太网的网络结构,物理层从上到下包括RS子层、PCS子层、物理媒介连接子层(Physical Medium Attachment,PMA)和协调物理媒介相关子层(Physical Medium Dependent,PMD)。其中,RS子层和PCS子层通过MII接口连接,MII接口按照物理接口速率分为10G媒质不相关接口(10Gigabit Media Independent Interface,XGMII)、25G媒质不相关接口(25GMII)、40G媒质不相关接口(40Gbps Media Independent Inteface,XLGMII)等。PMA子层和PCS子层之间还可以包括前向纠错子层(Forward Error Correction,FEC)。
发送端设备可以采用现有的物理层中的PMD子层、PMA子层(、FEC子层)和PCS子层对收到业务数据流依次进行编码处理后得到第一MII接口数据,第一MII接口数据为以太网物理编码子层PCS输出的码块,编码方式可以是64B/66B,也可以是其他编码方式,例如将来可能出现的编码方式。
在WDM-PON网络上定义了以太网物理编码PCS子层,利用PCS子层的控制编码传递AMCC信息,实现了一种物理层装置(Physical Layer Device,PHY)以上的新的编码方式,不但兼容现有以太网标准,而且透传5G前传信号的MAC层,最大程度地降低网络系统的复杂性和延时,实现简单。
接收端设备接收AMCC信息与上述发送端设备发送AMCC信息是相反过程,包括以下步骤:
接收端设备将第二业务数据流转换为WDM-PON PMA接口数据。
按照预设的解码规则将WDM-PON PMA接口数据转换为第一 MII接口数据后,通过以太网PCS子层向外发送。
其中,当WDM-PON PMA接口数据承载AMCC信息时,提取AMCC信息并将承载AMCC信息的数据单元改写为空闲单元。
图2所示为本发明实施例提供的AMCC信息的传输方法的协议层结构示意图,根据此结构示意图,AMCC信道的信息理论上可放在图2中的FEC子层,但信道速率差异,PMD和PMA层差异会对应不同的FEC算法,需要对不同各种FEC算法进行重新定义和标准化。本发明实施例针对使用10GBASE-R和25G BASE-R的以太网接口进行eCPRI 5G前传信号传输的场景,使用WDM-PON承载,在WDM-PON上透传eCPRI 5G前传信号的MAC层,定义了WDM-PON的RS子层和PCS子层接口,利用PCS子层的控制编码传递管理和控制通道信息,具有如下明显技术效果:
1.和Transparent AMCC方法相比,此方法和装置消除了Transparent AMCC透明辅助管理和控制通道对光功率预算引入的损耗,降低了光器件设计的复杂性。
2.和采用FEC子层传输AMCC信息的方法相比,因为FEC算法在PCS子层以下完成,按照目前的技术路线,可利用IPG间隔很少,AMCC信息的传输带宽受限。
3.和采用FEC子层传输AMCC信息的方案相比,对应某些对延迟敏感的应用场景,例如URLLC,本发明实施例可以不使能FEC,从而降低端到端的延迟(比如线路状况好、距离短的情况下可以不使能FEC从而降低延迟)。
4.本发明实施例AMCC信息的传输解决方案对ONU和OLT之间的PMD、PMA、FEC子层不敏感,可以适配到多种传输介质上。
5.本发明实施例AMCC信息的传输方法,用于波分复用无源光网络WDM-PON承载以太网信号,可以兼容CPRI、eCPRI、NGFI及后续以太网类型。
下面各实施例均以5G前传WDM-PON网络为例进行具体说明。
本发明第一实施例提供一种辅助管理和控制通道信号的传输方法,参见图3所示,发送端设备发送AMCC信息包括以下步骤:
S110.发送端设备将第一业务数据流转换为以太网PMA接口数据后,通过以太网PCS子层输出第一MII接口数据。
按照预设的编码规则将第一MII接口数据转换为WDM-PON PMA接口数据,编码规则包括协调编码规则和WDM-PON PCS子层编码规则。
S120.根据协调编码规则将第一MII接口数据转换为64B/66B接口数据。
其中,当第一MII接口数据传输空闲单元时,WDM-PON PMA接口数据承载对空闲单元进行替换后的待传输的AMCC信息。待传输的AMCC信息是对原始AMCC数据进行适配处理得到的。
具体的,根据发送AMCC信息的请求,识别第一MII接口数据是否传输空闲字节,若是,则按照协调编码规则,将空闲字节替换为AMCC信息得到64B/66B接口数据;若否,则保留空闲字节并得到64B/66B接口数据。
64B/66B接口数据包括同步头和编码块,当同步头指示编码块为控制码块,且控制码块携带有指定的码字标识时,表示控制码块承载待传输的AMCC信息。
S130.根据WDM-PON PCS子层编码规则将64B/66B接口数据转换为WDM-PON PMA接口数据向外发送。
WDM-PON PCS子层编码规则用于将64B/66B接口数据通过WDM-PON PCS子层输出为WDM-PON PMA接口数据。
下面以发送端设备为ONU,ONU的eCPRI前传接口收到作为第一业务数据流的eCPRI信号,以目前的10GBASE-R-SR/LR/ER、10GBASE-R-LRM或者25GBASE-R-SR常用接口为例进行具体说明。
eCPRI信号为10G/25G Ethernet PMA_RX信号,该信号是从以太网PMA子层输出的非归零(Non-Return to Zero,NRZ)二进制编码。
在步骤S110中,10G/25G Ethernet PMA_RX信号经过以太网PCS子层进行64B/66B编码处理后得到的输出信号为第一MII接口数据。64B/66B PCS子层编码数据块的结构参见IEEE 802.3-2015的49.2.4.3Block structure的定义。
具体的,从10G/25G以太网PMA子层输入的信号通过25G/10G以太网PCS子层,此25G/10G以太网PCS子层是一个双速率的以太网PCS子层,输出符合25G BASE-R PCS子层标准的25GMII信号,第一MII接口数据的信号定义如下:
ETHPCS_RXD<63:0>:以太网PCS子层输出的数据信号,分为8组通道(lane),每组通道8比特(bit),对应一个完整的字节。
ETHPCS_RXC<7:0>:以太网PCS子层输出的数据信号属性指示信号,指示ETHPCS_RXD<63:0>的属性是控制属性(control_attribt)还是数据属性(mac_data_attribt),其中,ETHPCS_RXC<0>比特指示ETHPCS_RXD<7:0>的属性,ETHPCS_RXC<1>比特指示ETHPCS_RXD<15:8>的属性,以此类推。
ETH_RX_CLK:输入数据的时钟,在25G模式为390.625MHz±100ppm,在10G模式为156.625MHz±100ppm。在时钟的上升沿,ETHPCS_RXD<63:0>和ETHPCS_RXC<7:0>都会跳变。
在另一种示例中,上述信号组也可定义为如下格式:
ETHPCS_RXD<31:0>、ETHPCS_RXC<4:0>以及ETHPCS_RX_CLK,ETHPCS_RX_CLK上下沿信号均为有效数据,此种数据结构和上述描述同属一种数据结构定义,携带相同信息量,具体参见IEEE的802.3-2015_SECTION4中Table 46-2-Transmit and receive lane associations
当第一业务数据流包含作为分组间隙IPG的空闲字节时,ETHPCS_RXC<7:0>均为1,且ETHPCS_RXD<63:0>8组lane均为0x07时,即第一MII接口数据包含第一业务数据流中的空闲字节。
在步骤S120中,按照协调编码规则将第一MII接口数据转换为64B/66B接口数据。
具体的,64B/66B接口数据包括同步头和编码块,同步头为01时,编码块为数据块(D0D1D2D3D4D5D6D7);同步头为10时,编码块为控制块。
例如64B/66B接口数据包括:
WDMRS_TXD<63:0>:为符合64B/66B WDM-PON PCS子层编码的数据块。
WDMRS_SYNC<1:0>:为同步头指示信号,编码01指示WDMRS_TXD<63:0>为数据块,编码10指示WDMRS_TXD<63:0>为控制块。
ETH_RX_CLK:输入数据的时钟。
在步骤S120中,64B/66B接口数据的编码块的字节总数为N=8,指定的码字标识为1个字节,编码块中待传输的AMCC信息的字节总数为n,4≤n≤N-1。
根据上述编码规则,当n=7时,待传输的AMCC信息被构建为一个完整的64B/66B WDM-PON PCS子层的编码块。
当ETHPCS_RXC<7:0>均为1,且ETHPCS_RXD<63:0>8组lane均为0x07时,则WDMRS_SYNC<1:0>为10,且D0=WDMRS_TXD<0:7>为指定的码字标识,例如D0=0X15时,D1D2D3/D4D5D6D7为待传输的AMCC信号。
其他利用空闲码Idle传输AMCC信息的编码规则包括:
当ETHPCS_RXC<7:0>均为1,且ETHPCS_RXD<63:0>的8组lane为3组lane数据字节和1组lane TERMINATE(数据流终止位置编码:结束字符)控制字节时,可以利用ETHPCS_RXD<63:0>的其他4组空闲字节Idle来传输AMCC信息,此时:
同步头为10,编码块中的D0为指定的码字标识,该指定的码字标识与D0=0X15不同,此时,可以设定D0=0XB5,D1D2D3为数据码,D4D5D6D7中写入待传输的AMCC信息。本示例和其他示例具体参见下文表3。
在WDM-PON网络上定义了以太网PCS子层,利用PCS子层的控制编码传递AMCC信息,实现了一种新的编码方式,不但兼容现有以太网标准,而且透传5G前传信号的MAC层,最大程度地降低网络系统的复杂性和延时,实现简单。
在步骤S130中,通过WDM-PON PCS子层将64B/66B接口数据处理后得到WDM-PON PMA接口数据,即10G/25G PON PMA_TX信号。
具体可以参见IEEE 802.3-2015_49.Physical Coding Sublayer(PCS)for 64B/66B,type 10GBASE-R定义。将WDM-PON PMA接口数据输出到WDM_PON PMA子层。
如果输入的第一业务数据流为10GBASE-R的eCPRI信号,则WDM-PON PCS子层处理过程和FEC子层处理过程和10GBASE-R 定义一致。
如果输入的第一业务数据流为25GBASE-R的eCPRI信号,则WDM-PON PCS子层处理过程和FEC子层处理过程和25GBASE-R定义一致。
本发明第二实施例提供一种辅助管理和控制通道信号的传输方法,发送端设备发送AMCC信息包括以下步骤:
S210.发送端设备将第一业务数据流转换为以太网PMA接口数据后,通过以太网PCS子层输出第一MII接口数据。
步骤S210与步骤S110相同,此处不再赘述。
编码规则包括以太网RS子层编码规则和WDM-PON编码规则;
S220.根据以太网RS子层编码规则,对第一MII接口数据进行控制信息提取处理后得到第二MII接口数据,其中,控制信息提取处理包括从第一MII接口数据中提取指定的控制字符并回填空闲字符。
具体的,指定的控制字符包括LPI和SEQUENCE控制码。
S230.根据WDM-PON编码规则,将第二MII接口数据转换为WDM-PON PMA接口数据向外发送。
在步骤S220中,对输入信号ETHPCS_RXC<7:0>和ETHPCS_RXD<63:0>(即第一MII接口数据),按照表1中第一MII接口数据和第二MII接口数据之间的转换关系进行识别,因为无线前传信号是一个完整的MAC信号,在输入的数据流中,通过识别START码(数据流开始位置编码:开始字符)和TERMINATE(数据流终止位置编码:结束字符),将无线前传信号完整的识别出来进行后续处理。
对于识别出的低功耗指示编码(Low Power Idle,LPI)和链路层的状态指示信号编码(SEQUENCE),单送出相关指示信号,并将该 字节填写为空闲码(Idle)。
第二MII接口数据包括:
ETHRS_TXD<63:0>:分为8组通道(lane),每组通道(lane)8比特(bit),对应一个完整的字节。
ETHRS_TXC<7:0>:指示ETHRS_TXD<63:0>的属性是控制属性(control_attribt)还是数据属性(data_attribt),其中,ETHRS_TXC<0>比特指示ETHRS_TXD<7:0>的属性,定义为lane0属性定义,ETHRS_TXC<1>比特指示ETHRS_TXD<15:8>的属性,lane1属性定义,以此类推。
ETH_RX_CLK:输入数据的时钟。
图4所示为步骤S220的具体流程图:
备注:图中“<=”即赋值。
S221.根据第一MII接口数据中的控制信号ETHPCS_RXC<7:0>,判断数据信号ETHPCS_RXD<63:0>各通道(lane)是否为控制属性,若否,进入步骤S222;若是,进入步骤S223。
S222将ETHPCS_RXD<63:0>输出到第二MII接口数据的数据信号ETHRS_TXD<63:0>,以及将ETHRS_TXC<7:0>赋值为0(即数据属性),结束。
S223识别数据信号ETHPCS_RXD<63:0>各通道(lane)中编码的类型。
S224当ETHPCS_RXD<63:0>中某个通道的编码为START码或TERMINATE码时,ETHRS_TXD<=ETHPCS_RXD,ETHRS_TXC<=控制属性,结束。
S225当ETHPCS_RXD<63:0>中的编码为LPI和SEQUENCE码时,ETHRS_TXD<=Idle空闲码,ETHRS_TXC<=控制属性,结束。
具体的,上述步骤的执行结果参见表1:
表1:第一MII接口数据和第二MII接口数据之间的转换关系(不同输入码型下25G/10G以太网RS的处理方式)
Figure PCTCN2018121887-appb-000001
本文件定义的:
ETHRS_TXC<0>/ETHRS_TXC<4>对应于802.3-2015标准46.1.6 XGMII structure定义的lane0;
ETHRS_TXC<1>/ETHRS_TXC<5>对应于802.3-2015标准46.1.6 XGMII structure定义的lane1;
ETHRS_TXC<2>/ETHRS_TXC<6>对应于802.3-2015标准46.1.6 XGMII structure定义的lane2;
ETHRS_TXC<3>/ETHRS_TXC<7>对应于802.3-2015标准46.1.6 XGMII structure定义的lane3。
其他功能描述栏中输入编码参见IEEE 802.3-2015标准Table 46–3的编码定义。
根据表1所示,对于ETHPCS_RXC=control_attribt的信息进行识别,分别按照表1所示识别出空闲码,SEQUENCE码,START码,TERMINATE码和transmit error码。
对于识别出的以太网LPI信号,SEQUENCE字段,分别输出LPI_IND信息和SEQUENCE_IND信息,ETHRS_TXD输出空闲码。
对于识别出的以太网传输错误transmit error码,在ETHRS_TXD输出对应的transmit error编码,并输出transmit error_ind(传输错误)信息。
对于ETHPCS_RXC=1下的其他码型,在ETHRS_TXD均输出0x07(Idle)空闲码编码。此编码指示此时ETHRS_TXD上不携带有效信息。可以用于AMCC信息的传递。
对于TERMINATE和START码,在ETHRS_TXD输出仍为TERMINATE和START码。
步骤S220所输出的第二MII接口数据参见表2所示,编码规则参见后续实施例的说明。
表2:第二MII接口数据的编码定义(25G/10G WDM-PON RS的输入编码定义)
Figure PCTCN2018121887-appb-000002
Figure PCTCN2018121887-appb-000003
在表2中,D0_IN对应输入ETHRS_TXD<63:0>的<7:0>,D1_IN对应于ETHRS_TXD<63:0>的<15:7>,以此类推。any表示0x00 to oxFF编码,T表示TERMINATE编码0XFD,S表示START编码0XFB,OTHER code:表示此表中没有包含的编码定义,Idle表示编码0X07。
在步骤S230中,将步骤S220输出的第二MII接口数据(ETHRS_TXD<63:0>、ETHRS_TXC<7:0>以及ETH_RX_CLK)转换为WDM-PON PMA接口数据,WDM-PON PMA接口数据为10G/25G PON PMA_TX信号,具体说明参见步骤S130。
本发明第三实施例提供一种辅助管理和控制通道信号的传输方法,发送端设备发送AMCC信息包括以下步骤:
S310.发送端设备将第一业务数据流转换为以太网PMA接口数据后,通过以太网PCS子层输出第一MII接口数据。
步骤S310与步骤S110相同,此处不再赘述。
编码规则包括以太网RS子层编码规则、WDM-PON协调RS子层编码规则和WDM-PON PCS子层编码规则。
S320.根据以太网RS子层编码规则,对第一MII接口数据进行控制信息提取处理后得到第二MII接口数据,其中,控制信息提取处理包括从第一MII接口数据中提取指定的控制字符并回填空闲字符。
步骤S320输出的第二MII接口数据包括:ETHRS_TXD<63:0>、ETHRS_TXC<7:0>和ETH_RX_CLK。
步骤S320与步骤S220相同,此处不再赘述。
S330.根据WDM-PON RS子层编码规则,将第二MII接口数据转换为64B/66B接口数据。
S340.根据WDM-PON PCS子层编码规则,将64B/66B接口数据转换为WDM-PON PMA接口数据向外发送。
步骤S340与步骤S130相同,此处不再赘述。
在步骤S330中,得到的64B/66B接口数据包括:
WDMRS_TXD<63:0>:为符合64B/66B WDM-PON PCS子层编码的数据块。
WDMRS_SYNC<1:0>:为同步头指示信号,编码01指示WDMRS_TXD<63:0>为数据块,编码10指示WDMRS_TXD<63:0>为控制块。
ETH_RX_CLK:输入数据的时钟。
WDM-PON RS子层编码规则包括编码规则1、2、3.1-3.8和4.1-4.2,参见表2和表3所示。对步骤S320输出的第二MII接口数据和待传输的AMCC信号进行识别,选择对应的编码规则。
编码规则1:对应输入的数据流全部为数据属性;
编码规则2.1:对应输入的数据流全部为控制属性并且为Idle属性编码;
编码规则3.1:对应输入的数据流包含7个数据属性字段和一个控制属性字段:TERMINATE编码;
编码规则3.2:对应输入的数据流包含6个数据属性字段和一个控制属性字段:TERMINATE编码;
以下类推,
编码规则3.8:对应输入的数据流包含1个控制属性字段:TERMINATE编码,用于指示前级时钟传递的数据属性字段完结;
编码规则4.1:对应输入的数据流在D0位置包含1个控制属性字段:START编码,后续D1,D2,D3,D4,D4,D5,D7都是数据属性;
编码规则4.2:对应输入的数据流在D4位置包含1个控制属性字段:START编码,后续D4,D4,D5,D7都是数据属性。
表3:64B/66B接口数据的编码定义(25G/10G WDM-PON RS的编码规则定义)
备注:下表除编码规则1中的WDMRS_SYNC<1:0>为01外,其他的均为10。
Figure PCTCN2018121887-appb-000004
在表3中,D0_IN对应输入ETHRS_TXD<63:0>的<7:0>,D1_IN对应于ETHRS_TXD<63:0>的<15:7>,以此类推。编码规则2-4的D0 值也可根据需求配置为其他具备唯一性的编码。
编码块的字节总数为N,指定的码字标识为1个字节,编码块中待传输的AMCC信息的字节总数为n,4≤n≤N-1。
所述64B/66B接口数据包括同步头和编码块;
所述编码块包括D0至D7八个字节,其中,D0为码字标识,当同步头指示编码块为控制码块时,D0为指定的码字标识,包括:
D0为第一码字标识,D4D5D6D7承载传输的AMCC信息;
D0为第二码字标识,D3D4D5D6D7承载传输的AMCC信息;
D0为第三码字标识,D2D3D4D5D6D7承载传输的AMCC信息;
D0为第四码字标识,D1D2D3D4D5D6D7承载传输的AMCC信息;
D0为第五码字标识,D1D2D3D4D5D6D7承载传输的AMCC信息;
其中,由第二MII接口数据转为64B/66B接口数据时,第一码字标识至第四码字标识均表示D0为被转换的第二MII接口数据中的结束字节,D0和AMCC信息之间的其他字节为该结束字节前的数据字节;第五码字标识表示被转换的第二MII接口数据均为空闲字符。
由64B/66B接口数据转为第二MII接口数据时,第一码字标识至第四码字标识均表示D0为转换得到的第二MII接口数据中的结束字节,D0和AMCC信息之间的其他字节为该结束字节前的数据字节;第五码字标识表示转换得到的第二MII接口数据均为空闲字符。
在本实施例中列举5个利用空闲码Idle传输AMCC信息的编码规则,原因是D0虽然有8比特位宽,但能够用的只有低四位,因为64B/66B向FEC层编码转换的时候,会把D0的前4bit替换做处理,仅能用到后4bit,最多为2 4=16种控制码编码,表3中除编码规则1 外剩下共有16种控制编码,而且尽量用Idle字段多的控制编码,提高了AMCC通信容量与效率。
参见图5所示,步骤S330的具体流程图包括:
S331识别ETHRS_TXD<63:0>和ETHRS_TXC信号。
S332当符合编码规则1、3.1~3.4、4.1~4.2时,按表3定义的数据格式输出数据。
S333当符合编码规则2.1、3.5~3.8时,按表3定义的数据格式输出数据。其中,若无AMCC信息传输时,保持性现有的D0不变,(即0X1E、0XB4、0XAA、0X99、0X87不变)。
若有AMCC信息传输时,按表3定义的数据格式将D0替换为指定的码字标识,并将AMCC信息写入空闲字节Idle,并输出数据。
详细步骤如下:
当符合编码规则2.1时,将第二MII接口数据转换为64B/66B接口数据如下:
WDMRS_TXD<7:0><=0X15(即将0X1E替换为0X15)
WDMRS_TXD<63:8><=AMCC data
WDMRS_SYNC<1:0><=”10",结束。
当符合编码规则3.5时,将第二MII接口数据转换为64B/66B接口数据如下:
WDMRS_TXD<7:0><=0XB5(即将0XB4替换为0XB5)
WDMRS_TXD<63:32><=AMCC data
WDMRS_SYNC<1:0><=”10",结束。
当符合编码规则3.6时,将第二MII接口数据转换为64B/66B接口数据如下:
WDMRS_TXD<7:0><=0XAB(即将0XAA替换为0XAB)
WDMRS_TXD<63:24><=AMCC data
WDMRS_SYNC<1:0><=”10",结束。
当符合编码规则3.7时,将第二MII接口数据转换为64B/66B接口数据如下:
WDMRS_TXD<7:0><=0X9C(即将0X99替换为0X9C)
WDMRS_TXD<63:16><=AMCC data
WDMRS_SYNC<1:0><=”10",结束。
当符合编码规则3.8时,将第二MII接口数据转换为64B/66B接口数据如下:
WDMRS_TXD<7:0><=0X86(即将0X87替换为0X86)
WDMRS_TXD<63:8><=AMCC data
WDMRS_SYNC<1:0><=”10",结束。
本发明第四实施例提供一种辅助管理和控制通道信号的传输方法,接收端设备接收AMCC信息包括以下步骤:
S410接收端设备将第二业务数据流转换为WDM-PON PMA接口数据。
WDM-PON PMA接口数据可以是10G/25G PON PMA_RX。
解码规则包括WDM-PON PCS子层解码规则和协调解码规则。
S420根据WDM-PON PCS子层解码规则,将WDM-PON PMA接口数据转换为64B/66B接口数据。
64B/66B接口数据包括同步头和编码块,当同步头指示编码块为控制码块,且控制码块携带有指定的码字标识时,表示控制码块中承载待传输的AMCC信息。
具体的,64B/66B接口数据包括WDMRS_RXD<63:0>、WDMRS_RX_SYNC[1:0]和WDMRS_RX_CLK。
S430根据协调解码规则,将64B/66B接口数据转换为第一MII接口数据后向外发送,其中,当64B/66B接口数据承载AMCC信息 时,提取AMCC信息后回填空闲字符。
第一MII接口数据包括ETHPCS_TXD<63:0>、ETHPCS_TXC<7:0>和WDM_RX_CLK。
本发明第四实施例是第一实施例的相反过程,具体说明参见第一实施例的说明,此处不再赘述。
本发明第五实施例提供一种辅助管理和控制通道信号的传输方法,接收端设备接收AMCC信息包括以下步骤:
S510接收端设备将第二业务数据流转换为WDM-PON PMA接口数据。
解码规则包括WDM-PON解码规则和以太网RS子层解码规则。
S520根据WDM-PON解码规则,将WDM-PON PMA接口数据转换为第二MII接口数据。
第二MII接口数据包括WDM_RS_TXD<63:0>、WDM_RS_TXC<7:0>和WDM_RX_CLK。
S530根据以太网RS子层解码规则,对第二MII接口数据进行控制信息写入处理后得到第一MII接口数据后向外发送,其中,控制信息写入处理包括将第二MII接口数据中空闲字符替换为指定的控制字符。
本发明第五实施例是第二实施例的相反过程,具体说明参见第二实施例的说明,此处不再赘述。
本发明第六实施例提供一种辅助管理和控制通道信号的传输方法,接收端设备接收AMCC信息包括以下步骤:
S610接收端设备将第二业务数据流转换为WDM-PON PMA接口数据。
解码规则包括WDM-PON PCS子层解码规则、WDM-PON RS子 层解码规则和以太网RS子层解码规则。
S620根据WDM-PON PCS子层解码规则,将WDM-PON PMA接口数据转换为64B/66B接口数据。
64B/66B接口数据包括同步头和编码块,当同步头指示编码块为控制码块,且控制码块携带有指定的码字标识时,表示控制码块中承载待传输的AMCC信息。
S630根据WDM-PON RS子层解码规则,将64B/66B接口数据转换为第二MII接口数据,其中,当64B/66B接口数据承载AMCC信息时,提取AMCC信息后回填空闲字符。
S640根据以太网RS子层解码规则,对第二MII接口数据进行控制信息写入处理后得到第一MII接口数据后向外发送,其中,控制信息写入处理包括将第二MII接口数据中空闲字符替换为指定的控制字符。
本发明第六实施例是第三实施例的相反过程,具体说明参见第三实施例的说明,此处不再赘述。
本发明第七实施例还提供一种AMCC信息的传输系统,设于波分复用无源光网络WDM-PON的网络设备中,发送端设备和接收端设备双向发送和接收。AMCC信息的传输系统包括收发模块、AMCC适配处理模块和处理模块,用于实现上述各实施例AMCC信息的传输方法。
收发模块用于接收业务数据流和发送处理模块处理后的业务数据流。
处理模块用于将待传输的AMCC信息写入收到业务数据流中的空闲单元;还用于从携带AMCC信息的业务数据流中识别并提取出AMCC信息后回填空闲字符。
AMCC适配处理模块用于将原始AMCC数据进行适配处理得到待传输的AMCC信息;还用于对处理模块提取的AMCC信息进行适配处理。
具体的,处理模块包括以太网PCS子层处理单元和编解码单元。
以太网PCS子层处理单元用于对以太网PMA接口数据和第一MII接口数据进行相互转换。
编解码单元用于对第一MII接口数据和WDM-PON PMA接口数据进行相互转换。
其中,以太网PMA接口数据由收发模块收到的携带空闲单元的业务数据流转换得到;
WDM-PON PMA接口数据由收发模块收到的携带AMCC信息的业务数据流转换得到,且WDM-PON PMA接口数据承载AMCC信息。
基于第七实施例,一种WDM-PON 5G前传网络,包括发送端设备和接收端设备,并且发送端设备和接收端设备均设置AMCC信息的传输系统。
具体的,设置于发送端设备的传输系统,其收发模块接收带有空闲单元的第一业务数据流,第一业务数据流被转换为以太网PMA接口数据,AMCC适配处理模块将原始AMCC数据进行适配处理得到待传输的AMCC信息,处理模块将待传输的AMCC信息写入以太网PMA接口数据中的空闲单元,得到第二业务数据流,再通过收发模块发送给接收端设备。
设置于接收端设备的传输系统,其收发模块接收来自发送端设备的第二业务数据流,将第二业务数据流转换为WDM-PON PMA接口数据,其中,由于第二业务数据流中携带AMCC信息,WDM-PON  PMA接口数据承载AMCC信息。处理模块从WDM-PON PMA接口数据中识别并提取出AMCC信息后回填空闲字符,并发送到收发模块,将提取的AMCC信息发送到AMCC适配处理模块进行适配处理。
具体的,第一业务数据流可以为eCPRI信号,以下具体说明。
参见图6所示,本发明第八实施例提供一种AMCC信息的传输系统,在第七实施例的基础上,编解码处理单元包括协调处理单元和WDM-PON PCS子层处理单元。
协调处理单元用于对第一MII接口数据和64B/66B接口数据进行相互转换,64B/66B接口数据承载待传输的AMCC信息。
64B/66B接口数据包括同步头和编码块,当同步头指示编码块为控制码块,且控制码块携带有指定的码字标识时,表示控制码块承载待传输的AMCC信息。
编码块的字节总数为N,指定的码字标识为1个字节,编码块中待传输的AMCC信息的字节总数为n,3≤n≤N-1。
WDM-PON PCS子层处理单元用于对64B/66B接口数据和WDM-PON PMA接口数据进行相互转换。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,本实施例中各数据的具体说明以及各数据之间的转换,可以参考本发明方法第一实施例和第四实施例的对应过程,在此不再赘述。
本发明第九实施例提供一种AMCC信息的传输系统,在第七实施例的基础上,处理模块还包括控制信息处理单元,控制信息处理单元用于通知编解码单元提取和写入指定的控制字符,包括通知编解码单元在数据流中插入指定的控制字符,以及存储编解码单元从数据流中提取的指定的控制字符,指定的控制字符包括LPI和SEQUENCE信息。如图7所示,LPI_IDLE_ind表示控制信息处理单元收到了LPI 信息;SEQUENCE_ind表示控制信息处理单元收到了SEQUNENCE信息;LPI_IDLE_transmit表示控制信息处理单元发送LPI信息;SEQUENCE_transimit表示控制信息处理单元发送SEQUENCE信息。
编解码单元包括以太网RS子层处理单元和WDM-PON处理单元。
以太网RS子层处理单元用于从第一MII接口数据中提取指定的控制字符并回填空闲字符得到第二MII接口数据;还用于将第二MII接口数据中空闲字符替换为指定的控制字符得到第一MII接口数据。
WDM-PON处理单元用于对第二MII接口数据和WDM-PON PMA接口数据进行相互转换。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,本实施例中各数据的具体说明以及各数据之间的转换,可以参考本发明方法第二实施例和第五实施例的对应过程,在此不再赘述。
参见图7所示,本发明第十实施例提供一种AMCC信息的传输系统,处理模块包括以太网PCS子层处理单元、以太网RS子层处理单元、以太网RS子层处理单元、WDM-PON RS子层处理单元和控制信息处理单元。
控制信息处理单元用于通知编解码单元提取和写入指定的控制字符,包括通知编解码单元在数据流中插入指定的控制字符,以及存储编解码单元从数据流中提取的指定的控制字符,指定的控制字符包括LPI和SEQUENCE信息。
以太网PCS子层处理单元用于对以太网PMA接口数据和第一MII接口数据进行相互转换。
以太网RS子层处理单元用于从第一MII接口数据中提取指定的控制字符并回填空闲字符得到第二MII接口数据;还用于将第二MII 接口数据中空闲字符替换为指定的控制字符得到第一MII接口数据。
WDM-PON RS子层处理单元用于对第二MII接口数据和64B/66B接口数据进行相互转换,64B/66B接口数据承载待传输的AMCC信息。
WDM-PON PCS子层处理单元用于对64B/66B接口数据和WDM-PON PMA接口数据进行相互转换。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,本实施例中各数据的具体说明以及各数据之间的转换,可以参考本发明方法第三实施例和第六实施例的对应过程,在此不再赘述。
还是以前述说明中发送端设备为ONU,ONU的前传eCPRI接口收到作为第一业务数据流的eCPRI信号,10GBASE-R-SR/LR/ER、10GBASE-R-LRM或者25GBASE-R-SR常用接口为例具体说明如下,参见图7所示:(1)发送AMCC信息方向:
25G/10G以太网PCS子层处理单元从以太网PMA接口输入10G/25G Ethernet PMA_RX信号;从25GMII接口输出第一MII接口数据到以太网RS子层处理单元,第一MII接口数据包括数据信号ETHPCS_RXD<63:0>、控制信号ETHPCS_RXC<7:0>和输入数据的时钟ETH_RX_CLK。
25G/10G以太网RS子层处理单元从第一MII接口数据中提取LPI和SEQUENCE码:LP_IDLE_ind和SEQUENCE_ind。从25GMII接口输出第二MII接口数据到25G/10G WDM-PON RS子层处理单元,第二MII接口数据包括数据信号ETHRS_TXD<63:0>、控制信号ETHRS_TXC<7:0>以及输入数据的时钟ETH_RX_CLK。
25G/10G WDM-PON RS子层处理单元从64B/66B接口输出64B/66B接口数据到25G/10G WDM-PON PCS子层处理单元, 64B/66B接口数据包括编码块WDMRS_TXD<63:0>、同步头WDMRS_TX_SYNC[1:0]和时钟信号ETH_RX_CLK。
25G/10G WDM-PON PCS子层处理单元从64B/66B接口输入64B/66B接口数据,从WDM-PON PMA接口输出WDM-PON PMA接口数据,WDM-PON PMA接口数据为10G/25G PON PMA_TX。(2)接收AMCC信息方向:
25G/10G WDM-PON PCS子层处理单元从WDM-PON PMA接口输入WDM-PON PMA接口数据,WDM-PON PMA接口数据为10G/25G PON PMA_RX;从64B/66B接口输出64B/66B接口数据到WDM-PON RS子层处理单元,64B/66B接口数据包括编码块WDMRS_RXD<63:0>、同步头WDMRS_RX_SYNC[1:0]和时钟信号WDMRS_RX_CLK。
25G/10G WDM-PON RS子层处理单元从25GMII接口输出第二MII接口数据到25G/10G以太网RS子层处理单元的25GMII接口,第二MII接口数据包括数据信号WDM_RS_TXD<63:0>、控制信号WDM_RS_TXC<7:0>和时钟WDM_RX_CLK。
25G/10G以太网RS子层处理单元向第二MII接口数据中写入LPI和SEQUENCE码:LP_IDLE_transmit和SEQUENCE_transmit。从25GMII接口输出第一MII接口数据到25G/10G以太网PCS子层处理单元,第一MII接口数据包括ETHPCS_TXD<63:0>、ETHPCS_TXC<7:0>和WDM_RX_CLK。
25G/10G以太网PCS子层处理单元从以太网PMA接口输出10G/25G Ethernet PMA_TX信号。
各信号的具体说明参见前面实施例。
当数据从图7中的前传eCPRI接口进入,WDM_PON接口流出 时;或者从WDM_PON接口进入,前传eCPRI接口流出时,其AMCC信号的传输可以参考第一至第六实施例。
图7中的以太网PCS子层处理单元、以太网RS子层处理单元、WDM-PON RS子层处理单元和WDM-PON PCS子层处理单元可以以任何方式进行组合,不作限制。
本发明不局限于上述实施方式,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也视为本发明的保护范围之内。本说明书中未作详细描述的内容属于本领域专业技术人员公知的现有技术。

Claims (33)

  1. 一种AMCC信息的传输方法,用于波分复用无源光网络WDM-PON承载以太网信号,其特征在于,其包括:
    发送端设备从收到的第一业务数据流中识别出空闲单元;
    将待传输的AMCC信息写入空闲单元后得到第二业务数据流,将第二业务数据流发往接收端设备。
  2. 如权利要求1所述的AMCC信息的传输方法,其特征在于:
    发送端设备将所述第一业务数据流转换为以太网PMA接口数据后,通过以太网PCS子层输出第一MII接口数据;
    将第一MII接口数据转换为WDM-PON PMA接口数据后向外发送;
    其中,当第一MII接口数据传输空闲单元时,WDM-PON PMA接口数据承载对空闲单元进行替换后的待传输的AMCC信息。
  3. 如权利要求2所述的AMCC信息的传输方法,其特征在于:
    将所述第一MII接口数据转换为64B/66B接口数据,再将64B/66B接口数据转换为所述WDM-PON PMA接口数据,其中,当所述第一MII接口数据传输空闲单元时,64B/66B接口数据承载待传输的AMCC信息。
  4. 如权利要求3所述的AMCC信息的传输方法,其特征在于:
    对所述第一MII接口数据进行控制信息提取处理后得到第二MII接口数据,再将第二MII接口数据转换为所述64B/66B接口数据,其中,控制信息提取处理包括从所述第一MII接口数据中提取指定的控制字符并回填空闲字符。
  5. 如权利要求2所述的AMCC信息的传输方法,其特征在于:
    对所述第一MII接口数据进行控制信息提取处理后得到第二MII 接口数据,再将第二MII接口数据转换为所述WDM-PON PMA接口数据,其中,控制信息提取处理包括从所述第一MII接口数据中提取指定的控制字符并回填空闲字符。
  6. 如权利要求5所述的AMCC信息的传输方法,其特征在于:
    将所述第二MII接口数据转换为64B/66B接口数据,再将64B/66B接口数据转换为所述WDM-PON PMA接口数据,其中,当所述第一MII接口数据传输空闲单元时,64B/66B接口数据承载待传输的AMCC信息。
  7. 如权利要求4或5所述的AMCC信息的传输方法,其特征在于:所述指定的控制字符包括LPI和SEQUENCE控制码。
  8. 如权利要求3、4或6所述的AMCC信息的传输方法,其特征在于:所述64B/66B接口数据包括同步头和编码块,当同步头指示编码块为控制码块,且控制码块携带有指定的码字标识时,表示控制码块承载待传输的AMCC信息。
  9. 如权利要求8所述的AMCC信息的传输方法,其特征在于:所述编码块的字节总数为N=8,所述指定的码字标识为1个字节,所述编码块中待传输的AMCC信息的字节总数为n,4≤n≤N-1。
  10. 如权利要求4或6所述的AMCC信息的传输方法,其特征在于:所述64B/66B接口数据包括同步头和编码块;
    所述编码块包括D0至D7八个字节,其中,D0为码字标识,当同步头指示编码块为控制码块时,D0为指定的码字标识,包括:
    D0为第一码字标识,D4D5D6D7承载待传输的AMCC信息;
    D0为第二码字标识,D3D4D5D6D7承载待传输的AMCC信息;
    D0为第三码字标识,D2D3D4D5D6D7承载待传输的AMCC信息;
    D0为第四码字标识,D1D2D3D4D5D6D7承载待传输的AMCC信息;
    D0为第五码字标识,D1D2D3D4D5D6D7承载待传输的AMCC信息;
    其中,第一码字标识至第四码字标识均表示D0为被转换的所述第二MII接口数据中的结束字节,D0和AMCC信息之间的其他字节为该结束字节前的数据字节;第五码字标识表示被转换的所述第二MII接口数据均为空闲字符。
  11. 如权利要求1所述的AMCC信息的传输方法,其特征在于:所述第一业务数据流为eCPRI信号。
  12. 一种AMCC信息的传输方法,用于波分复用无源光网络WDM-PON,其特征在于,其包括:
    接收端设备从收到的第二业务数据流中识别并提取出AMCC信息;
    将第二业务数据流中承载AMCC信息的数据单元替换为空闲单元后向外发送。
  13. 如权利要求12所述的AMCC信息的传输方法,其特征在于:接收端设备将所述第二业务数据流转换为WDM-PON PMA接口数据;
    将WDM-PON PMA接口数据转换为第一MII接口数据后,通过以太网PCS子层向外发送;
    其中,WDM-PON PMA接口数据承载的AMCC信息被取出后回填空闲字符。
  14. 如权利要求13所述的AMCC信息的传输方法,其特征在于:将所述WDM-PON PMA接口数据转换为64B/66B接口数据,再 将64B/66B接口数据转换为所述第一MII接口数据,其中,当64B/66B接口数据承载AMCC信息时,提取AMCC信息后回填空闲字符。
  15. 如权利要求14所述的AMCC信息的传输方法,其特征在于:将所述64B/66B接口数据转换为第二MII接口数据,再对第二MII接口数据进行控制信息写入处理后得到所述第一MII接口数据,其中,控制信息写入处理包括将所述第二MII接口数据中空闲字符替换为指定的控制字符。
  16. 如权利要求13所述的AMCC信息的传输方法,其特征在于:将所述WDM-PON PMA接口数据转换为第二MII接口数据,再对第二MII接口数据进行控制信息写入处理后得到所述第一MII接口数据,其中,控制信息写入处理包括将所述第二MII接口数据中空闲字符替换为指定的控制字符。
  17. 如权利要求16所述的AMCC信息的传输方法,其特征在于:将所述WDM-PON PMA接口数据转换为64B/66B接口数据,再将64B/66B接口数据转换为所述第二MII接口数据,其中,当64B/66B接口数据承载AMCC信息时,提取AMCC信息后回填空闲字符。
  18. 如权利要求15或16所述的AMCC信息的传输方法,其特征在于:所述指定的控制字符包括LPI和SEQUENCE控制码。
  19. 如权利要求14、15或17所述的AMCC信息的传输方法,其特征在于:所述64B/66B接口数据包括同步头和编码块,当同步头指示编码块为控制码块,且控制码块携带有指定的码字标识时,表示控制码块承载了传输的AMCC信息。
  20. 如权利要求19所述的AMCC信息的传输方法,其特征在于:所述编码块的字节总数为N=8,所述指定的码字标识为1个字节,所述编码块中传输的AMCC信息的字节总数为n,4≤n≤N-1。
  21. 如权利要求15或17所述的AMCC信息的传输方法,其特征在于:所述64B/66B接口数据包括同步头和编码块;
    所述编码块包括D0至D7八个字节,其中,D0为码字标识,当同步头指示编码块为控制码块时,D0为指定的码字标识,包括:
    D0为第一码字标识,D4D5D6D7承载传输的AMCC信息;
    D0为第二码字标识,D3D4D5D6D7承载传输的AMCC信息;
    D0为第三码字标识,D2D3D4D5D6D7承载传输的AMCC信息;
    D0为第四码字标识,D1D2D3D4D5D6D7承载传输的AMCC信息;
    D0为第五码字标识,D1D2D3D4D5D6D7承载传输的AMCC信息;
    其中,第一码字标识至第四码字标识均表示D0为转换得到的第二MII接口数据中的结束字节,D0和AMCC信息之间的其他字节为该结束字节前的数据字节;第五码字标识表示转换得到的第二MII接口数据均为空闲字符。
  22. 如权利要求11所述的AMCC信息的传输方法,其特征在于:所述第一业务数据流为eCPRI信号。
  23. 一种AMCC信息的传输系统,设于波分复用无源光网络WDM-PON的网络设备中,其特征在于:所述系统包括收发模块、处理模块和AMCC适配处理模块;
    收发模块用于接收业务数据流和发送处理模块处理后的业务数据流;
    处理模块用于将待传输的AMCC信息写入收到业务数据流中的空闲单元;还用于从携带AMCC信息的业务数据流中识别并提取出AMCC信息后回填空闲字符;
    AMCC适配处理模块用于将原始AMCC数据进行适配处理得到待传输的AMCC信息;还用于对处理模块提取的AMCC信息进行适配处理。
  24. 如权利要求23所述的AMCC信息的传输系统,其特征在于,所述处理模块包括:
    以太网PCS子层处理单元,其用于对以太网PMA接口数据和第一MII接口数据进行相互转换;
    编解码单元,其用于对第一MII接口数据和WDM-PON PMA接口数据进行相互转换;
    其中,以太网PMA接口数据由收发模块收到的携带空闲单元的业务数据流转换得到;
    WDM-PON PMA接口数据由收发模块收到的携带AMCC信息的业务数据流转换得到,且WDM-PON PMA接口数据承载AMCC信息。
  25. 如权利要求24所述的AMCC信息的传输系统,其特征在于,所述编解码单元包括:
    协调处理单元,其用于对所述第一MII接口数据和64B/66B接口数据进行相互转换,64B/66B接口数据承载传输的AMCC信息;
    WDM-PON PCS子层处理单元,其用于对64B/66B接口数据和所述WDM-PON PMA接口数据进行相互转换。
  26. 如权利要求25所述的AMCC信息的传输系统,其特征在于:所述处理模块还包括控制信息处理单元,控制信息处理单元用于通知所述编解码单元提取和写入指定的控制字符;
    所述协调处理单元包括:
    以太网RS子层处理单元,其用于从所述第一MII接口数据中提 取所述指定的控制字符并回填空闲字符得到第二MII接口数据;还用于将所述第二MII接口数据中所述空闲字符替换为所述指定的控制字符得到所述第一MII接口数据;
    WDM-PON RS子层处理单元,其用于对第二MII接口数据和所述64B/66B接口数据进行相互转换。
  27. 如权利要求24所述的AMCC信息的传输系统,其特征在于:所述处理模块还包括控制信息处理单元,控制信息处理单元用于通知所述编解码单元提取和写入指定的控制字符;
    所述编解码单元包括:
    以太网RS子层处理单元,其用于将所述第一MII接口数据中所述指定的控制字符替换为空闲字符得到第二MII接口数据;还用于将所述第二MII接口数据中空闲字符替换为所述指定的控制字符得到所述第一MII接口数据;
    WDM-PON处理单元,其用于对第二MII接口数据和所述WDM-PON PMA接口数据进行相互转换。
  28. 如权利要求27所述的AMCC信息的传输系统,其特征在于,所述WDM-PON处理单元包括:
    WDM-PON RS子层处理单元,其用于对所述第二MII接口数据和64B/66B接口数据进行相互转换,64B/66B接口数据承载传输的AMCC信息;
    WDM-PON PCS子层处理单元,其用于对64B/66B接口数据和所述WDM-PON PMA接口数据进行相互转换。
  29. 如权利要求26或27任一项所述的AMCC信息的传输方法,其特征在于:所述指定的控制字符包括LPI和SEQUENCE控制码。
  30. 如权利要求25、26或28所述的AMCC信息的传输方法,其特征在于:所述64B/66B接口数据包括同步头和编码块,当同步头指示编码块为控制码块,且控制码块携带有指定的码字标识时,表示控制码块承载传输的AMCC信息。
  31. 如权利要求30所述的AMCC信息的传输方法,其特征在于:所述编码块的字节总数为N=8,所述指定的码字标识为1个字节,所述编码块中传输的AMCC信息的字节总数为n,4≤n≤N-1。
  32. 如权利要求26或28所述的AMCC信息的传输方法,其特征在于:所述64B/66B接口数据包括同步头和编码块;
    所述编码块包括D0至D7八个字节,其中,D0为码字标识,当同步头指示编码块为控制码块时,D0为指定的码字标识,包括:
    D0为第一码字标识,D4D5D6D7承载传输的AMCC信息;
    D0为第二码字标识,D3D4D5D6D7承载传输的AMCC信息;
    D0为第三码字标识,D2D3D4D5D6D7承载传输的AMCC信息;
    D0为第四码字标识,D1D2D3D4D5D6D7承载传输的AMCC信息;
    D0为第五码字标识,D1D2D3D4D5D6D7承载传输的AMCC信息;
    其中,由第二MII接口数据转为64B/66B接口数据时,第一码字标识至第四码字标识均表示D0为被转换的所述第二MII接口数据中的结束字节,D0和AMCC信息之间的其他字节为该结束字节前的数据字节;第五码字标识表示被转换的所述第二MII接口数据均为空闲字符;
    由64B/66B接口数据转为第二MII接口数据时,第一码字标识至第四码字标识均表示D0为转换得到的第二MII接口数据中的结束 字节,D0和AMCC信息之间的其他字节为该结束字节前的数据字节;第五码字标识表示转换得到的第二MII接口数据均为空闲字符。
  33. 如权利要求23所述的AMCC信息的传输方法,其特征在于:所述第一业务数据流为eCPRI信号。
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