CN109039537B

CN109039537B - AMCC information transmission method and system

Info

Publication number: CN109039537B
Application number: CN201810831553.XA
Authority: CN
Inventors: 黄元波; 刘新峰; 刘登强
Original assignee: Fiberhome Telecommunication Technologies Co Ltd; Wuhan Fisilink Microelectronics Technology Co Ltd
Current assignee: Fiberhome Telecommunication Technologies Co Ltd; Wuhan Fisilink Microelectronics Technology Co Ltd
Priority date: 2018-07-26
Filing date: 2018-07-26
Publication date: 2020-05-05
Anticipated expiration: 2038-07-26
Also published as: PH12020551210A1; CN109039537A; WO2020019640A1; BR112020016104A2

Abstract

The invention discloses a transmission method and a transmission system of AMCC information, and relates to the technical field of communication. The transmission method is used for the wavelength division multiplexing passive optical network WDM-PON to bear Ethernet signals, and comprises the following steps: the sending end equipment identifies an idle unit from the received first service data stream; and writing the AMCC information to be transmitted into the idle unit to obtain a second service data stream, and sending the second service data stream to the receiving terminal equipment. The service data and the AMCC information are independent from each other, so that the transmission of the service data is not influenced, the loss of the transparent AMCC to the optical power budget is eliminated, the complexity of the design of the optical device is reduced, and the bandwidth resource is fully utilized.

Description

AMCC information transmission method and system

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and a system for transmitting Auxiliary Management and Control Channel (AMCC) information.

Background

The 5G fronthaul is an important component of a 5G network bearer, a 5G Cloud wireless access network (C-RAN) needs to support three application scenarios, namely Enhanced Mobile broadband Band (eMBB), Massive Machine communication (mtc), high-reliability Low-latency communication (URLLC), Distributed node (DU)/centralized node (Central Unit, CU) centralized pooling, and the 5G site is greatly increased, which causes a very tight fronthaul fiber resource from an antenna to a Machine room. The 5G front transmission has very high requirements on access rate, time delay, jitter, isolation and reliability, and the solution of a high-speed 10G/25G/50G Wavelength Division Multiplexing Passive Optical Network (WDM-PON) supports colorless and adjustable multi-channel transmission and low-delay forwarding capability based on Array Waveguide Grating (AWG) and point-to-multipoint physical networking architecture, has a high-power budget supporting 10KM deployment scene, and can provide a high-safety, high-reliability, low-delay and low-jitter exclusive Wavelength channel for services on the premise of saving Optical fiber resources.

Fig. 1 shows an existing WDM-PON5G forwarding network architecture, when a WDM-PON network is used to carry a 5G forwarding signal, a DU and a Remote Radio Unit (RRU) are connected based on a WDM-PON point-to-multipoint tree type network topology, a WDM-PON Optical Line Terminal (OLT) is connected to a CU, and an Optical Network Unit (ONU) is connected to an RRU, and a wavelength division multiplexing technique is used to implement transparent transmission between the DU and the RRU.

In a WDM-PON bearer network, AMCC information is required to transmit wavelength assignment, allocation information, and Operation, Administration, and Maintenance (OAM) data. The AMCC information is added to each wavelength in the downlink and uplink directions. The WDM-PON system transparently transmits a bit stream payload without terminating any part of its frame structure, so AMCC information should be superimposed into the transmission bit stream payload and use the same wavelength as the payload, while there is little mutual interference between the AMCC information and the payload data. This scenario is called transparent amcc (transparent amcc). The specific implementation mode of the transparent AMCC comprises a baseband overmodulation scheme and a radio frequency modulation scheme, and if the modulation depth of the AMCC signal to the data signal is 10%, 1dB optical power cost is introduced, so that the transmission distance of the system is influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a method and a system for transmitting AMCC information, which realize the transmission of the AMCC information and do not influence the transmission of service data.

The invention provides a transmission method of AMCC information, which is used for a wavelength division multiplexing passive optical network WDM-PON to bear Ethernet signals and comprises the following steps:

the sending end equipment identifies an idle unit from the received first service data stream;

and writing the AMCC information to be transmitted into the idle unit to obtain a second service data stream, and sending the second service data stream to the receiving terminal equipment.

On the basis of the technical scheme, the sending end equipment converts the first service data stream into Ethernet PMA interface data and outputs first MII interface data through an Ethernet PCS sublayer;

converting the first MII interface data into WDM-PON PMA interface data and then sending the WDM-PON PMA interface data to the outside;

when the first MII interface data transmits the idle unit, the WDM-PON PMA interface data carries the AMCC information to be transmitted after the idle unit is replaced.

On the basis of the technical scheme, 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, wherein when the first MII interface data transmits an idle unit, the 64B/66B interface data carries AMCC information to be transmitted.

On the basis of the technical scheme, control information extraction processing is carried out on the first MII interface data to obtain second MII interface data, and then the second MII interface data is converted into 64B/66B interface data, wherein the control information extraction processing comprises the steps of extracting specified control characters from the first MII interface data and backfilling idle characters.

On the basis of the technical scheme, control information extraction processing is carried out on the first MII interface data to obtain second MII interface data, and then the second MII interface data is converted into WDM-PON PMA interface data, wherein the control information extraction processing comprises the steps of extracting specified control characters from the first MII interface data and backfilling idle characters.

On the basis of the technical scheme, 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, wherein when the first MII interface data transmits an idle unit, the 64B/66B interface data carries AMCC information to be transmitted.

On the basis of the technical scheme, the specified control character comprises an LPI and a SEQUENCE control code.

On the basis of the technical scheme, the 64B/66B interface data comprises a synchronization head and a coding block, and when the synchronization head indicates that the coding block is a control code block and the control code block carries a specified code word identifier, the control code block is indicated to carry AMCC information to be transmitted.

On the basis of the technical scheme, the total number of bytes of the coding block is N-8, the designated code word identifier is 1 byte, the total number of bytes of the AMCC information to be transmitted in the coding block is N, and N is greater than or equal to 4 and less than or equal to N-1.

On the basis of the technical scheme, the 64B/66B interface data comprises a synchronous head and a coding block;

the coding block comprises eight bytes D0-D7, wherein D0 is a code word identifier, and when the synchronization header indicates that the coding block is a control code block, D0 is a designated code word identifier, and the method comprises the following steps:

d0 is a first code word identification, and D4D5D6D7 carries AMCC information to be transmitted;

d0 is a second code word identification, and D3D4D5D6D7 carries AMCC information to be transmitted;

d0 is a third code word identification, and D2D3D4D5D6D7 carries AMCC information to be transmitted;

d0 is a fourth code word identification, and D1D2D3D4D5D6D7 carries AMCC information to be transmitted;

d0 is a fifth code word identification, and D1D2D3D4D5D6D7 carries AMCC information to be transmitted;

wherein, the first codeword identification to the fourth codeword identification all indicate that D0 is an end byte in the converted second MII interface data, and other bytes between D0 and AMCC information are data bytes before the end byte; and the fifth code word identification indicates that the converted second MII interface data are all idle characters.

On the basis of the above technical solution, the first service data stream is an eccri signal.

The invention also provides a transmission method of AMCC information, which is used for a wavelength division multiplexing passive optical network WDM-PON and comprises the following steps:

the receiving end equipment identifies and extracts AMCC information from the received second service data stream;

and replacing the data unit bearing the AMCC information in the second service data flow with an idle unit and then sending the data unit outwards.

On the basis of the technical scheme, the receiving end equipment converts the second service data stream into WDM-PONPMA interface data;

after the WDM-PON PMA interface data is converted into first MII interface data, the first MII interface data is sent out through an Ethernet PCS sublayer;

and refilling idle characters after AMCC information carried by the WDM-PON PMA interface data is taken out.

On the basis of the technical scheme, the WDM-PON PMA interface data is converted into 64B/66B interface data, the 64B/66B interface data is converted into the first MII interface data, and when the 64B/66B interface data carries AMCC information, idle characters are backfilled after the AMCC information is extracted.

On the basis of the technical scheme, the 64B/66B interface data is converted into second MII interface data, and control information writing processing is performed on the second MII interface data to obtain the first MII interface data, wherein the control information writing processing comprises the step of replacing idle characters in the second MII interface data with designated control characters.

On the basis of the technical scheme, the WDM-PON PMA interface data is converted into second MII interface data, and control information writing processing is carried out on the second MII interface data to obtain the first MII interface data, wherein the control information writing processing comprises the step of replacing idle characters in the second MII interface data with designated control characters.

On the basis of the technical scheme, the WDM-PON PMA interface data is converted into 64B/66B interface data, the 64B/66B interface data is converted into the second MII interface data, and when the 64B/66B interface data carries AMCC information, idle characters are backfilled after the AMCC information is extracted.

On the basis of the technical scheme, the 64B/66B interface data comprises a synchronization header and a coding block, and when the synchronization header indicates that the coding block is a control code block and the control code block carries a specified code word identifier, the control code block is indicated to carry the transmitted AMCC information.

On the basis of the technical scheme, the total number of bytes of the coding block is N-8, the designated code word identifier is 1 byte, the total number of bytes of the AMCC information transmitted in the coding block is N, and N is greater than or equal to 4 and less than or equal to N-1.

d0 is a first codeword identification, and D4D5D6D7 carries transmitted AMCC information;

d0 is a second codeword identifier, and D3D4D5D6D7 carries transmitted AMCC information;

d0 is a third codeword identifier, D2D3D4D5D6D7 carries transmitted AMCC information;

d0 is a fourth codeword identification, D1D2D3D4D5D6D7 carries transmitted AMCC information;

d0 is a fifth codeword identification, D1D2D3D4D5D6D7 carries transmitted AMCC information;

the first codeword identifier to the fourth codeword identifier all represent that D0 is an end byte in the converted second MII interface data, and other bytes between D0 and AMCC information are data bytes before the end byte; and the fifth code word identification indicates that the converted second MII interface data are idle characters.

The invention also provides a transmission system of AMCC information, which is arranged in the network equipment of the WDM-PON, and comprises a receiving and transmitting module, a processing module and an AMCC adaptation processing module;

the receiving and sending module is used for receiving the service data stream and sending the service data stream processed by the processing module;

the processing module is used for writing the AMCC information to be transmitted into an idle unit in the received service data stream; the AMCC information is identified and extracted from the service data flow carrying the AMCC information, and then idle characters are backfilled;

the AMCC adaptation processing module is used for carrying out adaptation processing on the original AMCC data to obtain AMCC information to be transmitted; and the AMCC processing module is also used for carrying out adaptation processing on the AMCC information extracted by the processing module.

On the basis of the technical scheme, the processing module comprises:

the Ethernet PCS sublayer processing unit is used for converting the Ethernet PMA interface data and the first MII interface data into each other;

the encoding and decoding unit is used for performing interconversion on the first MII interface data and the WDM-PON PMA interface data;

the Ethernet PMA interface data is obtained by converting a service data stream carrying an idle unit received by a transceiver module;

the WDM-PON PMA interface data is obtained by converting service data stream carrying AMCC information received by the transceiver module, and the WDM-PON PMA interface data carries the AMCC information.

On the basis of the above technical solution, the encoding and decoding unit includes:

the coordination processing unit is used for mutually converting the first MII interface data and 64B/66B interface data, and the 64B/66B interface data carries transmitted AMCC information;

a WDM-PON PCS sublayer processing unit to interconvert 64B/66B interface data and the WDM-PON PMA interface data.

On the basis of the technical scheme, the processing module further comprises a control information processing unit, and the control information processing unit is used for informing the coding and decoding unit of extracting and writing the specified control characters;

the coordination processing unit includes:

the Ethernet RS sublayer processing unit is used for extracting the specified control character from the first MII interface data and backfilling idle characters to obtain second MII interface data; the second MII interface data is also used for replacing the idle character in the second MII interface data with the appointed control character to obtain the first MII interface data;

a WDM-PON RS sublayer processing unit for interconverting the second MII interface data and the 64B/66B interface data.

the encoding and decoding unit includes:

the Ethernet RS sublayer processing unit is used for replacing the designated control character in the first MII interface data with an idle character to obtain second MII interface data; the first MII interface data is obtained by replacing idle characters in the second MII interface data with the specified control characters;

a WDM-PON processing unit to interconvert second MII interface data and the WDM-PON PMA interface data.

On the basis of the above technical solution, the WDM-PON processing unit includes:

the WDM-PON RS sublayer processing unit is used for performing interconversion on the second MII interface data and 64B/66B interface data, and the 64B/66B interface data carries transmitted AMCC information;

On the basis of the technical scheme, the 64B/66B interface data comprises a synchronization header and a coding block, and when the synchronization header indicates that the coding block is a control code block and the control code block carries a specified code word identifier, the control code block is indicated to carry transmitted AMCC information.

when the second MII interface data is converted into 64B/66B interface data, the first code word identification to the fourth code word identification all represent that D0 is an end byte in the converted second MII interface data, and other bytes between D0 and AMCC information are data bytes before the end byte; the fifth code word identification indicates that the converted second MII interface data are all idle characters;

when the 64B/66B interface data is converted into second MII interface data, the first code word identifier to the fourth code word identifier represent that D0 is an end byte in the converted second MII interface data, and other bytes between D0 and AMCC information are data bytes before the end byte; and the fifth code word identification indicates that the converted second MII interface data are idle characters.

Compared with the prior art, the invention has the following advantages:

(1) the Idle unit (Idle) without carrying service is used for transmitting the AMCC information of the auxiliary management and control channel, and the service data and the AMCC information are independent from each other, so that the transmission of the service data is not influenced, the loss of the transparent AMCC caused by the optical power budget is eliminated, the complexity of the design of an optical device is reduced, and the bandwidth resource is fully utilized.

(2) An Ethernet Physical Coding Sub-layer (PCS) is defined on a WDM-PON network, and the control Coding of the PCS Sub-layer is utilized to transmit AMCC information, so that a new Coding mode is realized, the existing Ethernet standard is compatible, the MAC layer of 5G fronthaul signals is transparently transmitted, the complexity and the time delay of a network system are reduced to the greatest extent, and the realization is simple.

(3) On the basis of the PCS sublayer, the difficulty of encoding and decoding is further reduced and the reliability of the network system is improved by using the interface and function of the existing ethernet coordination sublayer (RS).

Drawings

Fig. 1 is a prior WDM-PON5G fronthaul network architecture;

fig. 2 is a schematic diagram of a protocol layer structure of a transmission method of AMCC information according to an embodiment of the present invention;

fig. 3 is a flowchart of sending end equipment sending AMCC information according to the first embodiment of the present invention;

FIG. 4 is a detailed flowchart of step S220;

FIG. 5 is a detailed flowchart of step S330;

fig. 6 is a schematic diagram of a transmission system of AMCC information according to an eighth embodiment of the present invention;

fig. 7 is a diagram illustrating a transmission system of AMCC information according to a tenth embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

The transmission method of the AMCC information provided by the embodiment of the invention is used for a wavelength division multiplexing passive optical network WDM-PON, and the WDM-PON system generally allocates a pair of wavelengths for each ONU, and the wavelengths are respectively used for uplink and downlink transmission, thereby providing fixed virtual point-to-point bidirectional connection from an OLT to each ONU. When communication is performed in a WDM-PON system, it is generally necessary to perform control management using AMCC information, for example: the activation/registration/authorization of the ONU, the temperature and voltage of an ONU optical module, the receiving and transmitting optical power, the alarm of the ONU and the like.

The transmission method of the AMCC information comprises the following steps:

the sending end equipment 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 end equipment.

And the receiving end equipment identifies and extracts the AMCC information from the received second service data flow, replaces a data unit bearing the AMCC information in the second service data flow with an idle unit and then sends the data unit outwards.

In the uplink direction, the sending end equipment is an ONU, and the receiving end equipment is an OLT; in the downlink direction, the sending end device is an OLT, and the receiving end device is an appointed target ONU.

The first traffic data stream is ethernet traffic data including wireless fronthaul interface signals in the WDM-PON5G fronthaul network architecture shown in fig. 1. The wireless Fronthaul Interface signal may include a Common Public Radio Interface (CPRI) signal, an enhanced-Common Public radio Interface (eccri) signal, a Next-Generation Fronthaul Interface (NGFI) signal, and the like.

For example, the CPRI signal may be received from a BBU or RRU, and the coding format of the CPRI signal employs 8B/10B coding. The eCPRI signal is a universal wireless interface for 5G forwarding, the interface uses the mainstream Ethernet transmission interface, and currently, 10GBASE-R-SR/LR/ER, 10GBASE-R-LRM and 25GBASE-R-SR are common interfaces. The eCPRI protocol layer data is carried by the IP network and is transmitted by the Ethernet interface.

The traffic data stream contains packet gaps (IPGs), such as ethernet packet traffic data streams. The IPG may be an Idle unit (Idle) having a plurality of data formats, such as an Idle message at a Media Access Control (MAC) layer or above, a Media Independent Interface (MII) Idle byte, an Idle code block having a physical layer coding format, and the like.

The method utilizes an Idle unit (Idle) of a packet gap IPG without a service to transmit auxiliary management and control channel AMCC information, and service data and AMCC information are independent from each other, so that the transmission of the service data is not influenced, the transparent AMCC is realized, the loss of the transparent AMCC caused by the optical power budget is eliminated, the complexity of the design of an optical device is reduced, and bandwidth resources are fully utilized.

The following specifically describes sending AMCC information by the sending end device and receiving AMCC information by the receiving end device, respectively.

Specifically, the sending end device sending the AMCC information includes the following steps:

and after converting the first service data stream into Ethernet PMA interface data, the sending end equipment outputs first MII interface data through an Ethernet PCS sublayer.

And converting the first MII interface data into WDM-PON PMA interface data according to a preset coding rule and then sending the WDM-PON PMA interface data outwards.

When the first MII interface data transmits the idle unit, the WDM-PON PMA interface data carries the AMCC information to be transmitted after the idle unit is replaced. The AMCC information to be transmitted is obtained by performing adaptation processing on the original AMCC data.

According to the network structure of the ethernet, the Physical layer includes, from top to bottom, an RS sublayer, a PCS sublayer, a Physical Medium Attachment (PMA) and a coordinated Physical Medium Dependency (PMD). The RS sublayer and the PCS sublayer are connected through an MII (Media Independent Interface), and the MII is divided into a 10G Media Independent Interface (XGMII), a 25G Media Independent Interface (25GMII), a 40G Media Independent Interface (XLGGMII) and the like according to the physical Interface rate. A Forward Error Correction (FEC) sublayer may be further included between the PMA sublayer and the PCS sublayer.

The sending end device may use a PMD sublayer, a PMA sublayer (, an FEC sublayer) and a PCS sublayer in the existing physical layer to sequentially encode the received service data stream to obtain first MII interface data, where the first MII interface data is a code block output by a PCS of an ethernet physical coding sublayer, and the encoding mode may be 64B/66B, or other encoding modes, such as a coding mode that may appear in the future.

An Ethernet Physical coding PCS sublayer is defined on a WDM-PON network, the control coding of the PCS sublayer is utilized to transmit AMCC information, a new coding mode above a Physical Layer Device (PHY) is realized, the existing Ethernet standard is compatible, an MAC Layer of 5G forward signals is transmitted in a transparent mode, the complexity and the time delay of a network system are reduced to the maximum extent, and the realization is simple.

The receiving end equipment receives the AMCC information and the sending end equipment sends the AMCC information, which is the reverse process, and comprises the following steps:

and the receiving end equipment converts the second service data stream into WDM-PON PMA interface data.

And after the WDM-PON PMA interface data is converted into first MII interface data according to a preset decoding rule, the first MII interface data is sent out through an Ethernet PCS sublayer.

When the WDM-PON PMA interface data carries AMCC information, extracting the AMCC information and rewriting the data unit carrying the AMCC information into an idle unit.

Fig. 2 is a schematic diagram of a protocol layer structure of a transmission method of AMCC information according to an embodiment of the present invention, according to the schematic diagram of the structure, information of an AMCC channel can be theoretically placed in an FEC sublayer in fig. 2, but a difference in channel rate, a difference in PMD and a difference in PMA layer may correspond to different FEC algorithms, and different FEC algorithms need to be redefined and standardized. Aiming at the scene of carrying out eCPRI 5G forwarding signal transmission by using Ethernet interfaces of 10GBASE-R and 25G BASE-R, the embodiment of the invention uses WDM-PON to carry, a MAC layer for transparently transmitting eCPRI 5G forwarding signals on the WDM-PON defines an RS sublayer interface and a PCS sublayer interface of the WDM-PON, transmits management and control channel information by using control coding of the PCS sublayer, and has the following obvious technical effects:

1. compared with the Transparent AMCC method, the method and the device eliminate the loss of Transparent auxiliary management and control channels of the Transparent auxiliary management and control.

2. Compared with the method for transmitting AMCC information by using the FEC sublayer, because the FEC algorithm is completed below the PCS sublayer, according to the current technical route, the available IPG intervals are few, and the transmission bandwidth of the AMCC information is limited.

3. Compared with the scheme of transmitting the AMCC information by adopting the FEC sub-layer, the embodiment of the invention can not enable FEC corresponding to certain application scenes sensitive to delay, such as URLLC, thereby reducing end-to-end delay (for example, the delay can be reduced by not enabling FEC under the conditions of good line condition and short distance).

4. The transmission solution of AMCC information in the embodiment of the invention is insensitive to PMD, PMA and FEC sublayers between ONU and OLT, and can be adapted to various transmission media.

5. The transmission method of the AMCC information is used for the wavelength division multiplexing passive optical network WDM-PON to bear the Ethernet signals, and can be compatible with CPRI, eCPRI, NGFI and subsequent Ethernet types.

The following embodiments are specifically described by taking a 5G forwarding WDM-PON network as an example.

A first embodiment of the present invention provides a method for transmitting an auxiliary management and control channel signal, and referring to fig. 3, a sending end device sends AMCC information, including the following steps:

and S110, after the sending end device converts the first service data stream into Ethernet PMA interface data, outputting the first MII interface data through an Ethernet PCS sublayer.

And converting the first MII interface data into WDM-PON PMA interface data according to a preset coding rule, wherein the coding rule comprises a coordination coding rule and a WDM-PON PCS sublayer coding rule.

And S120, converting the first MII interface data into 64B/66B interface data according to the coordination coding rule.

Specifically, whether idle bytes are transmitted by first MII interface data is identified according to a request for sending AMCC information, if so, the idle bytes are replaced by the AMCC information according to a coordination coding rule to obtain 64B/66B interface data; if not, the free byte is reserved and 64B/66B interface data is obtained.

The 64B/66B interface data comprises a synchronization head and a coding block, and when the synchronization head indicates that the coding block is a control code block and the control code block carries a specified code word identifier, the control code block is indicated to carry AMCC information to be transmitted.

And S130, converting the 64B/66B interface data into WDM-PON PMA interface data according to the WDM-PON PCS sublayer coding rule and sending the WDM-PON PMA interface data outwards.

And the WDM-PON PCS sublayer coding rule is used for outputting the 64B/66B interface data to be WDM-PON PMA interface data through the WDM-PON PCS sublayer.

The following specifically explains the current common interface of 10GBASE-R-SR/LR/ER, 10GBASE-R-LRM or 25GBASE-R-SR as an example, by taking the sending end device as an ONU, and the eCPRI front transmission interface of the ONU receiving the eCPRI signal as the first service data stream.

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.

In step S110, the output signal of the 10G/25G Ethernet PMA _ RX signal subjected to 64B/66B coding by the Ethernet PCS sublayer is the first MII interface data. The structure of a 64B/66B PCS sub-layer coded data Block is defined in 49.2.4.3Block Structure by IEEE 802.3-2015.

Specifically, the signal input from the 10G/25G ethernet PMA sublayer passes through the 25G/10G ethernet PCS sublayer, which is a dual-rate ethernet PCS sublayer, and outputs a 25GMII signal conforming to the 25G BASE-R PCS sublayer standard, where the first MII interface data signal is defined as follows:

ETHPCS _ RXD <63:0 >: the data signal output by the Ethernet PCS sublayer is divided into 8 groups of channels (lane), and each group of channels has 8 bits (bit) corresponding to a complete byte.

ETHPCS _ RXC <7:0 >: the data signal attribute indication signal output by the ethernet PCS sublayer indicates whether the attribute of ETHPCS _ RXD <63:0> is a control attribute (control _ atterbt) or a data attribute (mac _ data _ atterbt), wherein the ETHPCS _ RXC <0> bit indicates the attribute of ETHPCS _ RXD <7:0>, the ETHPCS _ RXC <1> bit indicates the attribute of ETHPCS _ RXD <15:8>, and so on.

ETH _ RX _ CLK: the clock of the input data was 390.625 MHz. + -. 100ppm in the 25G mode and 156.625 MHz. + -. 100ppm in the 10G mode. On the rising edge of the clock, both ETHPCS _ RXD <63:0> and ETHPCS _ RXC <7:0> transition.

In another example, the signal group may be defined as the following format:

ETHPCS _ RXD <31:0>, ETHPCS _ RXC <4:0> and ETHPCS _ RX _ CLK, wherein the upper and lower edge signals of the ETHPCS _ RX _ CLK are effective data, the data structure belongs to the same data structure definition as the description, and carries the same information quantity, which is specifically referred to Table 46-2-Transmit and receive lanoceanicals in IEEE 802.3-2015_ SECTION4

When the first traffic data stream contains idle bytes as a packetization gap IPG, ETHPCS _ RXC <7:0> are all 1, and ETHPCS _ RXD <63:0>8 groups are all 0x07, i.e. the first MII interface data contains idle bytes in the first traffic data stream.

In step S120, the first MII interface data is converted into 64B/66B interface data according to the harmonized encoding rule.

Specifically, the 64B/66B interface data includes a sync header and a coding block, and when the sync header is 01, the coding block is a data block (D0D1D2D3D4D5D6D 7); when the sync header is 10, the coding block is a control block.

For example, 64B/66B interface data includes:

WDMRS _ TXD <63:0 >: the data block is encoded according to a 64B/66B WDM-PON PCS sublayer.

WDMRS _ SYNC <1:0 >: for the sync header indicator, code 01 indicates WDMRS _ TXD <63:0> as a data block and code 10 indicates WDMRS _ TXD <63:0> as a control block.

ETH _ RX _ CLK: a clock of the input data.

In step S120, the total number of bytes of the coding block of the 64B/66B interface data is N ═ 8, 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, and N is greater than or equal to 4 and less than or equal to N-1.

According to the above coding rule, when n is 7, the AMCC information to be transmitted is constructed as a complete 64B/66BWDM-PON PCS sublayer coding block.

When ETHPCS _ RXC <7:0> are all 1, and ETHPCS _ RXD <63:0>8 sets of lane are all 0X07, then WDMRS _ SYNC <1:0> is 10, and D0 ═ WDMRS _ TXD <0:7> is the designated codeword identification, e.g., D0 ═ 0X15, D1D2D3/D4D5D6D7 is the AMCC signal to be transmitted.

Other coding rules for transmitting AMCC information by using Idle code Idle include:

when ETHPCS _ RXC <7:0> is 1 and 8 lanes of ETHPCS _ RXD <63:0> are 3 lanes of data bytes and 1 lane of TERMINATE (data stream end position code: end character) control bytes, the other 4 sets of Idle bytes Idle of ETHPCS _ RXD <63:0> can be used to transmit AMCC information, at this time:

the sync header is 10, D0 in the coding block is a designated codeword identifier, which is different from D0 ═ 0X15, at this time, D0 ═ 0XB5, D1D2D3 can be set as the data code, and AMCC information to be transmitted is written in D4D5D6D 7. This example and other examples are specifically referred to below in table 3.

An Ethernet PCS sublayer is defined on a WDM-PON network, and the control coding of the PCS sublayer is utilized to transmit AMCC information, so that a new coding mode is realized, the existing Ethernet standard is compatible, the MAC layer of a 5G forward transmission signal is transmitted in a transparent mode, the complexity and the time delay of a network system are reduced to the greatest extent, and the realization is simple.

In step S130, the WDM-PON PCS sublayer processes the 64B/66B interface data to obtain WDM-PON dma interface data, i.e. a 10G/25G PON PMA _ TX signal.

See in particular IEEE 802.3-2015-49. Physical Coding Subpayer (PCS) for 64B/66B, type 10GBASE-R definitions. Outputting the WDM-PON PMA interface data to the WDM _ PON PMA sublayer.

And if the input first service data flow is an eCPRI signal of 10GBASE-R, the WDM-PON PCS sublayer processing process and the FEC sublayer processing process are consistent with the definition of 10 GBASE-R.

And if the input first service data flow is an eCPRI signal of 25GBASE-R, the WDM-PON PCS sublayer processing process and the FEC sublayer processing process are consistent with the definition of the 25 GBASE-R.

A second embodiment of the present invention provides a method for transmitting an auxiliary management and control channel signal, where sending end equipment sends AMCC information, including the following steps:

and S210, after the sending end device converts the first service data stream into Ethernet PMA interface data, outputting the first MII interface data through an Ethernet PCS sublayer.

Step S210 is the same as step S110, and is not described herein again.

The coding rule comprises an Ethernet RS sublayer coding rule and a WDM-PON coding rule;

s220, according to the coding rule of the Ethernet RS sublayer, carrying out control information extraction processing on the first MII interface data to obtain second MII interface data, wherein the control information extraction processing comprises the steps of extracting specified control characters from the first MII interface data and backfilling idle characters.

Specifically, the designated control characters include LPI and SEQUENCE control codes.

And S230, converting the second MII interface data into WDM-PON PMA interface data according to the WDM-PON coding rule and sending the WDM-PON PMA interface data outwards.

In step S220, the input signals ETHPCS _ RXC <7:0> and ETHPCS _ RXD <63:0> (i.e., the first MII interface data) are identified according to the conversion relationship between the first MII interface data and the second MII interface data in table 1, because the wireless fronthaul signal is a complete MAC signal, and the wireless fronthaul signal is completely identified in the input data stream for subsequent processing by identifying a START code (data stream START position code: START character) and a TERMINATE code (data stream end position code: end character).

For the identified Low Power Idle (LPI) and link layer status indicator (SEQUENCE), sending out the related indicator and filling out the byte as Idle code (Idle).

The second MII interface data includes:

ETHRS _ TXD <63:0 >: the channel allocation method is divided into 8 groups of channels (lane), and each group of channels (lane) has 8 bits (bit) corresponding to a complete byte.

ETHRS _ TXC <7:0 >: indicating whether the attribute of ETHRS _ TXD <63:0> is a control attribute (control _ atterbt) or a data attribute (data _ atterbt), where the ETHRS _ TXC <0> bit indicates the attribute of ETHRS _ TXD <7:0>, defined as the lane0 attribute definition, the ETHRS _ TXC <1> bit indicates the attribute of ETHRS _ TXD <15:8>, the lane1 attribute definition, and so on.

ETH _ RX _ CLK: a clock of the input data.

Fig. 4 is a detailed flowchart of step S220:

remarking: in the figure, "< ═ is assigned.

S221, judging whether each channel (lane) of the data signals ETHPCS _ RXD <63:0> is a control attribute or not according to the control signals ETHPCS _ RXC <7:0> in the first MII interface data, and if not, entering step S222; if yes, the process proceeds to step S223.

S222 outputs ETHPCS _ RXD <63:0> to the data signal ETHRS _ TXD <63:0> for the second MII interface data and assigns ETHRS _ TXC <7:0> to 0 (i.e., a data attribute), ending.

S223 identifies the type of encoding in each channel (lane) of the data signal ETHPCS _ RXD <63:0 >.

S224 ends when the code of a channel in ETHPCS _ RXD <63:0> is the START code or the TERMINATE code, ETHRS _ TXD < ═ ETHPCS _ RXD, and ETHRS _ TXC < (control attribute).

S225 when the code in ETHPCS _ RXD <63:0> is LPI and SEQUENCE code, ETHRS _ TXD < (Idle code), ETHRS _ TXC < (control attribute), ends.

Specifically, the results of the above steps are shown in table 1:

table 1: conversion relationship between first MII interface data and second MII interface data (processing mode of 25G/10G Ethernet RS under different input code types)

As defined in this document:

ETHRS _ TXC <0>/ETHRS _ TXC <4> corresponds to lane0 defined by the 802.3-2015 standard 46.1.6XGMII structure;

ETHRS _ TXC <1>/ETHRS _ TXC <5> corresponds to lane1 defined by the 802.3-2015 standard 46.1.6XGMII structure;

ETHRS _ TXC <2>/ETHRS _ TXC <6> corresponds to lane2 defined by the 802.3-2015 standard 46.1.6XGMII structure;

ETHRS _ TXC <3>/ETHRS _ TXC <7> corresponds to lane3 defined by the 802.3-2015 standard 46.1.6XGMII structure.

The codes entered in the other function description fields are referred to the code definitions of IEEE 802.3-2015 standard Table 46-3.

As shown in table 1, the information of ETHPCS _ RXC ═ control _ attribt is identified, and the idle code, SEQUENCE code, START code, TERMINATE code, and transmit error code are identified as shown in table 1, respectively.

For the identified ethernet LPI signal, the SEQUENCE field outputs LPI _ IND information and SEQUENCE _ IND information, respectively, and the ETHRS _ TXD outputs idle code.

For the identified Ethernet transmission error transmit error code, the corresponding transmit error code is output at ETHRS _ TXD, and transmit error information is output.

For other patterns under ETHPCS _ RXC 1, 0x07(Idle) Idle code encoding is output at ETHRS _ TXD. This encoding indicates that no valid information is carried on the ETHRS _ TXD at this time. May be used for the transfer of AMCC information.

For TERMINATE and START codes, the TERMINATE and START codes remain at the ETHRS _ TXD output.

The second MII interface data output in step S220 is shown in table 2, and the encoding rule refers to the description of the subsequent embodiment.

Table 2: second MII interface data coding definition (input coding definition of 25G/10G WDM-PON RS)

IN Table 2, D0_ IN corresponds to <7:0> of the input ETHRS _ TXD <63:0>, D1_ IN corresponds to <15:7> of ETHRS _ TXD <63:0>, and so on. any denotes 0x00to oxFF code, T denotes TERMINATE code 0XFD, S denotes START code 0XFB, OTHER code: this table shows code definitions not included in this table, and Idle indicates code 0X 07.

In 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, which is a 10G/25GPON PMA _ TX signal, as described in step S130.

A third embodiment of the present invention provides a method for transmitting an auxiliary management and control channel signal, where sending end equipment sends AMCC information, including the following steps:

and S310, after the sending end device converts the first service data stream into Ethernet PMA interface data, outputting the first MII interface data through an Ethernet PCS sublayer.

Step S310 is the same as step S110, and is not described herein again.

The coding rules comprise an Ethernet RS sublayer coding rule, a WDM-PON coordination RS sublayer coding rule and a WDM-PONPCS sublayer coding rule.

And S320, according to the coding rule of the Ethernet RS sublayer, performing control information extraction processing on the first MII interface data to obtain second MII interface data, wherein the control information extraction processing comprises the steps of extracting specified control characters from the first MII interface data and backfilling idle characters.

The second MII interface data output by step S320 includes: ETHRS _ TXD <63:0>, ETHRS _ TXC <7:0>, and ETH _ RX _ CLK.

Step S320 is the same as step S220, and is not described herein again.

S330, converting the second MII interface data into 64B/66B interface data according to the WDM-PON RS sublayer coding rule.

And S340, converting 64B/66B interface data into WDM-PON PMA interface data according to the WDM-PON PCS sublayer coding rule and sending the WDM-PON PMA interface data outwards.

Step S340 is the same as step S130, and is not described herein again.

In step S330, the obtained 64B/66B interface data includes:

ETH _ RX _ CLK: a clock of the input data.

The 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. And identifying the second MII interface data output in the step S320 and the AMCC signal to be transmitted, and selecting a corresponding coding rule.

Encoding rule 1: all the corresponding input data streams are data attributes;

coding rule 2.1: all the corresponding input data streams are control attributes and are Idle attribute codes;

coding rule 3.1: the corresponding input data stream contains 7 data attribute fields and one control attribute field: TERMINATE code;

encoding rule 3.2: the corresponding input data stream contains 6 data attribute fields and a control attribute field: TERMINATE code;

by analogy with the following method,

coding rule 3.8: the corresponding input data stream contains 1 control attribute field: TERMINATE code to indicate completion of a data attribute field conveyed by a previous stage clock;

coding rule 4.1: the corresponding input data stream contains 1 control attribute field at position D0: START encoding, the successions D1, D2, D3, D4, D4, D5, D7 are all data attributes;

coding rule 4.2: the corresponding input data stream contains 1 control attribute field at position D4: START code, successors D4, D4, D5, D7 are data attributes.

Table 3: coding definition of 64B/66B interface data (coding rule definition of 25G/10G WDM-PON RS)

Remarking: the following table is 10 except that WDMRS _ SYNC <1:0> in coding rule 1 is 01.

IN Table 3, D0_ IN corresponds to <7:0> of the input ETHRS _ TXD <63:0>, D1_ IN corresponds to <15:7> of ETHRS _ TXD <63:0>, and so on. The D0 value of the encoding rules 2-4 can be configured into other unique codes according to requirements.

The total number of bytes of the coding block is N, the designated code word identification is 1 byte, the total number of bytes of the AMCC information to be transmitted in the coding block is N, and N is more than or equal to 4 and less than or equal to N-1.

The 64B/66B interface data comprises a synchronous header and a coding block;

when the second MII interface data is converted into 64B/66B interface data, the first code word identification to the fourth code word identification all represent that D0 is an end byte in the converted second MII interface data, and other bytes between D0 and AMCC information are data bytes before the end byte; the fifth code word identifies that the converted second MII interface data are all idle characters.

In this embodiment, 5 coding rules for transmitting AMCC information by Idle code Idle are listed, because D0 has 8-bit wide but only lower four bits can be used, because when the 64B/66B is converted to FEC layer coding, the first 4 bits of D0 are replaced and only the last 4 bits can be used, and the maximum is 2 bits⁴In table 3, 16 control codes are left except for the coding rule 1, and control codes with more Idle fields are used as much as possible, so that the AMCC communication capacity and efficiency are improved.

Referring to fig. 5, the detailed flowchart of step S330 includes:

s331 identifies the ETHRS _ TXD <63:0> and the ETHRS _ TXC signals.

S332, when the data accords with the coding rules 1, 3.1-3.4 and 4.1-4.2, outputting the data according to the data format defined in the table 3.

S333, when the data accords with the coding rules of 2.1, 3.5-3.8, outputting the data according to the data format defined in the table 3. If there is no AMCC information transmission, the existing D0 is kept unchanged (i.e. 0X1E, 0XB4, 0XAA, 0X99, 0X87 are unchanged).

If AMCC information is transmitted, replacing D0 with a specified code word identifier according to the data format defined in Table 3, writing the AMCC information into an Idle byte Idle, and outputting data.

The detailed steps are as follows:

when the encoding rule 2.1 is met, the second MII interface data is converted into 64B/66B interface data as follows:

WDMRS _ TXD <7:0> < ═ 0X15 (i.e., 0X1E is replaced with 0X15)

WDMRS_TXD<63:8><＝AMCC data

WDMRS _ SYNC <1:0> < ═ 10", end.

When the encoding rule 3.5 is met, the second MII interface data is converted into 64B/66B interface data as follows:

WDMRS _ TXD <7:0> < ═ 0XB5 (i.e., 0XB4 is replaced with 0XB5)

WDMRS_TXD<63:32><＝AMCC data

WDMRS _ SYNC <1:0> < ═ 10", end.

When the encoding rule 3.6 is met, the second MII interface data is converted into 64B/66B interface data as follows:

WDMRS _ TXD <7:0> < ═ 0XAB (i.e., 0XAA is replaced with 0XAB)

WDMRS_TXD<63:24><＝AMCC data

WDMRS _ SYNC <1:0> < ═ 10", end.

When the encoding rule 3.7 is met, the second MII interface data is converted into 64B/66B interface data as follows:

WDMRS _ TXD <7:0> < ═ 0X9C (i.e., 0X99 is replaced with 0X9C)

WDMRS_TXD<63:16><＝AMCC data

WDMRS _ SYNC <1:0> < ═ 10", end.

When the encoding rule 3.8 is met, the second MII interface data is converted into 64B/66B interface data as follows:

WDMRS _ TXD <7:0> < ═ 0X86 (i.e., 0X87 is replaced with 0X86)

WDMRS_TXD<63:8><＝AMCC data

WDMRS _ SYNC <1:0> < ═ 10", end.

A fourth embodiment of the present invention provides a method for transmitting an auxiliary management and control channel signal, where receiving end equipment receives AMCC information, including the following steps:

s410 the receiving end device converts the second service data flow into WDM-PON PMA interface data.

The WDM-PON PMA interface data may be 10G/25G PON PMA _ RX.

The decoding rules comprise WDM-PON PCS sublayer decoding rules and coordination decoding rules.

And S420, converting the WDM-PON PMA interface data into 64B/66B interface data according to the WDM-PON PCS sublayer decoding rule.

The 64B/66B interface data comprises a synchronization head and a coding block, and when the synchronization head indicates that the coding block is a control code block and the control code block carries a specified code word identifier, the control code block carries the AMCC information to be transmitted.

Specifically, the 64B/66B interface data includes WDMRS _ RXD <63:0>, WDMRS _ RX _ SYNC [1:0], and WDMRS _ RX _ CLK.

S430, according to the coordinated decoding rule, the 64B/66B interface data is converted into first MII interface data and then sent out, wherein when the 64B/66B interface data bears AMCC information, idle characters are backfilled after the AMCC information is extracted.

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 a reverse process of the first embodiment, and for specific description, reference is made to the description of the first embodiment, and details are not described here again.

A fifth embodiment of the present invention provides a method for transmitting an auxiliary management and control channel signal, where receiving end equipment receives AMCC information, including the following steps:

s510, the receiving end device converts the second service data flow into WDM-PON PMA interface data.

The decoding rules include WDM-PON decoding rules and Ethernet RS sublayer decoding rules.

S520, according to the WDM-PON decoding rule, the WDM-PON PMA interface data is converted into second MII interface data.

The second MII interface data includes WDM _ RS _ TXD <63:0>, WDM _ RS _ TXC <7:0>, and WDM _ RX _ CLK.

S530, according to the decoding rule of the Ethernet RS sublayer, the control information writing processing is carried out on the second MII interface data to obtain the first MII interface data, and then the first MII interface data is sent outwards, wherein the control information writing processing comprises the step of replacing the idle characters in the second MII interface data with the appointed control characters.

The fifth embodiment of the present invention is the reverse process of the second embodiment, and for the specific description, reference is made to the description of the second embodiment, which is not repeated herein.

A sixth embodiment of the present invention provides a method for transmitting an auxiliary management and control channel signal, where receiving end equipment receives AMCC information, including the following steps:

s610 the receiving end device converts the second service data flow into WDM-PON PMA interface data.

The decoding rules comprise WDM-PON PCS sublayer decoding rules, WDM-PON RS sublayer decoding rules and Ethernet RS sublayer decoding rules.

S620, according to the WDM-PON PCS sublayer decoding rule, the WDM-PON PMA interface data is converted into 64B/66B interface data.

S630, according to the WDM-PON RS sublayer decoding rule, the 64B/66B interface data is converted into second MII interface data, wherein when the 64B/66B interface data bears AMCC information, idle characters are backfilled after the AMCC information is extracted.

And S640, according to the decoding rule of the Ethernet RS sublayer, performing control information writing processing on the second MII interface data to obtain first MII interface data, and then sending the first MII interface data to the outside, wherein the control information writing processing comprises replacing idle characters in the second MII interface data with designated control characters.

The sixth embodiment of the present invention is a reverse process of the third embodiment, and for specific description, reference is made to the description of the third embodiment, which is not repeated herein.

The seventh embodiment of the present invention further provides a transmission system of AMCC information, which is disposed in a network device of a WDM-PON, where a sending end device and a receiving end device send and receive information bidirectionally. The transmission system of the AMCC information includes a transceiver module, an AMCC adaptation processing module and a processing module, and is used to implement the transmission method of the AMCC information in each of the embodiments.

The receiving and sending module is used for receiving the service data stream and sending the service data stream processed by the processing module.

The processing module is used for writing the AMCC information to be transmitted into an idle unit in the received service data stream; and the method is also used for identifying and extracting AMCC information from the service data flow carrying the AMCC information and backfilling idle characters.

Specifically, the processing module includes an ethernet PCS sublayer processing unit and a codec unit.

The Ethernet PCS sublayer processing unit is used for converting the Ethernet PMA interface data and the first MII interface data into each other.

The coding and decoding unit is used for carrying out mutual conversion on the first MII interface data and the WDM-PON PMA interface data.

Based on the seventh embodiment, a WDM-PON5G fronthaul network includes a sending end device and a receiving end device, and both the sending end device and the receiving end device set a transmission system for AMCC information.

Specifically, in a transmission system arranged in a sending end device, a transceiver module of the transmission system receives a first service data stream with an idle unit, the first service data stream is converted into ethernet PMA interface data, an AMCC adaptation processing module performs adaptation processing on original AMCC data to obtain AMCC information to be transmitted, a 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 the second service data stream is sent to a receiving end device through the transceiver module.

And the transceiver module of the transmission system is used for receiving the second service data stream from the sending end equipment and converting the second service data stream into WDM-PON PMA interface data, wherein the second service data stream carries AMCC information, and the WDM-PON PMA interface data carries AMCC information. The processing module identifies and extracts AMCC information from WDM-PON PMA interface data, backfills idle characters, sends the idle characters to the transceiving module, and sends the extracted AMCC information to the AMCC adaptation processing module for adaptation processing.

Specifically, the first service data stream may be an eccri signal, which is described in detail below.

Referring to fig. 6, an eighth embodiment of the present invention provides a transmission system for AMCC information, where in the seventh embodiment, the codec processing unit includes a coordination processing unit and a WDM-PON PCS sublayer processing unit.

The coordination processing unit is used for converting the first MII interface data and the 64B/66B interface data mutually, and the 64B/66B interface data carries the AMCC information to be transmitted.

The total number of bytes of the coding block is N, the designated code word identification is 1 byte, the total number of bytes of the AMCC information to be transmitted in the coding block is N, and N is more than or equal to 3 and less than or equal to N-1.

And the WDM-PON PCS sublayer processing unit is used for converting the 64B/66B interface data and the WDM-PON PMA interface data into each other.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, specific descriptions of each data and conversion between each data in this embodiment may refer to corresponding processes of the first embodiment and the fourth embodiment of the method of the present invention, and are not described herein again.

A ninth embodiment of the present invention provides an AMCC information transmission system, wherein on the basis of the seventh embodiment, 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 the specified control character, including notifying the codec unit to insert the specified control character into the data stream, and storing the specified control character extracted from the data stream by the codec unit, and the specified control character includes LPI and SEQUENCE information. As shown in fig. 7, 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 the SEQUENCE information; LPI _ IDLE _ transmit indicates that the control information processing unit transmits LPI information; SEQUENCE _ transition means that the control information processing unit transmits SEQUENCE information.

The coding and decoding unit comprises an Ethernet RS sublayer processing unit and a WDM-PON processing unit.

The Ethernet RS sublayer processing unit is used for extracting specified control characters from the first MII interface data and backfilling idle characters to obtain second MII interface data; and the method is also used for replacing the idle characters in the second MII interface data with the specified control characters to obtain the first MII interface data.

The WDM-PON processing unit is used for converting the second MII interface data and the WDM-PON PMA interface data to each other.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, specific descriptions of each data and conversion between each data in this embodiment may refer to corresponding processes of the second embodiment and the fifth embodiment of the method of the present invention, and are not described herein again.

Referring to fig. 7, a processing module in a tenth embodiment of the present invention includes an ethernet PCS sublayer processing unit, an ethernet RS sublayer processing unit, a WDM-PON RS sublayer processing unit, and a control information processing unit.

The control information processing unit is used for informing the coding and decoding unit to extract and write the specified control character, and comprises the steps of informing the coding and decoding unit to insert the specified control character in the data stream, and storing the specified control character extracted from the data stream by the coding and decoding unit, wherein the specified control character comprises LPI (low power indicator) and SEQUENCE (SEQUENCE indicator) information.

And the WDM-PON RS sublayer processing unit is used for converting the second MII interface data and the 64B/66B interface data mutually, and the 64B/66B interface data carries the AMCC information to be transmitted.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, specific descriptions of each data and conversion between each data in this embodiment may refer to corresponding processes of the third embodiment and the sixth embodiment of the method of the present invention, and are not described herein again.

Also, in the foregoing description, the sending end device is an ONU, and the forward-transmission eccri interface of the ONU receives an eccri signal serving as the first service data stream, and the common interface of 10GBASE-R-SR/LR/ER, 10GBASE-R-LRM, or 25GBASE-R-SR is specifically described as follows, for example, as shown in fig. 7: (1) sending AMCC information direction:

the 25G/10G Ethernet PCS sublayer processing unit inputs a 10G/25G Ethernet PMA _ RX signal from the Ethernet PMA interface; outputting first MII interface data from the 25GMII interface to the Ethernet RS sublayer processing unit, the first MII interface data comprising a data signal ETHPCS _ RXD <63:0>, a control signal ETHPCS _ RXC <7:0>, and a clock ETH _ RX _ CLK of the input data.

The 25G/10G Ethernet RS sublayer processing unit extracts LPI and SEQUENCE codes from the first MII interface data: LP _ IDLE _ ind and SEQUENCE _ ind. Outputting second MII interface data from the 25GMII interface to the 25G/10G WDM-PON RS sublayer processing unit, the second MII interface data including a data signal ETHRS _ TXD <63:0>, a control signal ETHRS _ TXC <7:0>, and a clock ETH _ RX _ CLK for the input data.

The 25G/10G WDM-PON RS sublayer processing unit outputs 64B/66B interface data to the 25G/10G WDM-PON PCS sublayer processing unit from a 64B/66B interface, wherein the 64B/66B interface data comprises coding blocks WDMRS _ TXD <63:0>, synchronization heads WDMRS _ TX _ SYNC [1:0] and a clock signal ETH _ RX _ CLK.

The 25G/10G WDM-PON PCS sublayer processing unit inputs 64B/66B interface data from a 64B/66B interface and outputs WDM-PON PMA interface data from a WDM-PON PMA interface, and the WDM-PON PMA interface data is 10G/25G PON PMA _ TX. (2) Receiving the AMCC information direction:

the 25G/10G WDM-PON PCS sublayer processing unit inputs WDM-PON PMA interface data from the WDM-PON PMA interface, and the WDM-PON PMA interface data is 10G/25G PON PMA _ RX; and outputting 64B/66B interface data to the WDM-PON RS sublayer processing unit from the 64B/66B interface, wherein the 64B/66B interface data comprises coding blocks WDMRS _ RXD <63:0>, synchronous heads WDMRS _ RX _ SYNC [1:0] and clock signals WDMRS _ RX _ CLK.

The 25G/10G WDM-PON RS sublayer processing unit outputs second MII interface data from the 25GMII interface to the 25GMII interface of the 25G/10G Ethernet RS sublayer processing unit, the second MII interface data including a data signal WDM _ RS _ TXD <63:0>, a control signal WDM _ RS _ TXC <7:0>, and a clock WDM _ RX _ CLK.

The 25G/10G Ethernet RS sublayer processing unit writes LPI and SEQUENCE codes into the second MII interface data: LP IDLE _ transmit and SEQUENCE _ transmit. Outputting first MII interface data from the 25GMII interface to the 25G/10G Ethernet PCS sublayer processing unit, the first MII interface data comprising ETHPCS _ TXD <63:0>, ETHPCS _ TXC <7:0>, and WDM _ RX _ CLK.

The 25G/10G Ethernet PCS sublayer processing unit outputs a 10G/25G Ethernet PMA _ TX signal from the Ethernet PMA interface.

For a detailed description of the signals, reference is made to the previous embodiments.

When data enters from the forwarding eCPRI interface in FIG. 7 and the WDM _ PON interface exits; or when the WDM _ PON interface enters and the forwarding eccri interface exits, the AMCC signals thereof may be transmitted according to the first to sixth embodiments.

The ethernet PCS sublayer processing unit, the ethernet RS sublayer processing unit, the WDM-PON RS sublayer processing unit, and the WDM-PON PCS sublayer processing unit in fig. 7 may be combined in any manner, without limitation.

The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.

Claims

1. A transmission method of AMCC information, which is used for a wavelength division multiplexing passive optical network WDM-PON to carry Ethernet signals, is characterized by comprising the following steps:

writing the AMCC information to be transmitted into an idle unit to obtain a second service data stream, and sending the second service data stream to receiving end equipment;

after the sending end device converts the first service data stream into Ethernet PMA interface data, first MII interface data is output through an Ethernet PCS sublayer;

2. The method for transmitting AMCC information according to claim 1, wherein:

and converting the first MII interface data into 64B/66B interface data, and converting the 64B/66B interface data into the WDM-PON PMA interface data, wherein when the first MII interface data transmits an idle unit, the 64B/66B interface data carries AMCC information to be transmitted.

3. The method for transmitting AMCC information according to claim 2, wherein:

and performing control information extraction processing on the first MII interface data to obtain second MII interface data, and converting the second MII interface data into the 64B/66B interface data, wherein the control information extraction processing comprises extracting specified control characters from the first MII interface data and backfilling idle characters.

4. The method for transmitting AMCC information according to claim 1, wherein:

and performing control information extraction processing on the first MII interface data to obtain second MII interface data, and converting the second MII interface data into WDM-PON PMA interface data, wherein the control information extraction processing comprises extracting specified control characters from the first MII interface data and backfilling idle characters.

5. The method for transmitting AMCC information according to claim 4, wherein:

and converting the second MII interface data into 64B/66B interface data, and converting the 64B/66B interface data into the WDM-PON PMA interface data, wherein when the first MII interface data transmits an idle unit, the 64B/66B interface data carries AMCC information to be transmitted.

6. The method for transmitting AMCC information according to claim 3 or 4, wherein: the designated control characters include LPI and SEQUENCE control codes.

7. The method for transmitting AMCC information according to claim 2, 3 or 5, wherein: the 64B/66B interface data comprises a synchronous head and a coding block, and when the synchronous head indicates that the coding block is a control code block and the control code block carries a specified code word identifier, the control code block is indicated to carry AMCC information to be transmitted.

8. The method for transmitting AMCC information of claim 7, wherein: the total number of bytes of the coding block is N-8, the designated code word identifier is 1 byte, the total number of bytes of the AMCC information to be transmitted in the coding block is N, and N is more than or equal to 4 and less than or equal to N-1.

9. The method for transmitting AMCC information according to claim 3 or 5, wherein: the 64B/66B interface data comprises a synchronous header and a coding block;

10. The method for transmitting AMCC information according to claim 1, wherein: the first service data stream is an eCPRI signal.

11. A transmission method of AMCC information is used for a wavelength division multiplexing passive optical network WDM-PON, and is characterized by comprising the following steps:

replacing the data unit bearing the AMCC information in the second service data flow with an idle unit and then sending the data unit outwards;

the receiving end equipment converts the second service data stream into WDM-PON PMA interface data;

after the WDM-PON PMA interface data is converted into first MII interface data, Ethernet PMA interface data is sent out through an Ethernet PCS sublayer, and the Ethernet PMA interface data is converted into a first service data flow;

12. The method for transmitting AMCC information of claim 11, wherein: and converting the WDM-PON PMA interface data into 64B/66B interface data, and converting the 64B/66B interface data into the first MII interface data, wherein when the 64B/66B interface data carries AMCC information, idle characters are backfilled after the AMCC information is extracted.

13. The transmission method of AMCC information of claim 12, wherein: and converting the 64B/66B interface data into second MII interface data, and performing control information writing processing on the second MII interface data to obtain the first MII interface data, wherein the control information writing processing comprises replacing a free character in the second MII interface data with a designated control character.

14. The method for transmitting AMCC information of claim 11, wherein: and converting the WDM-PON PMA interface data into second MII interface data, and performing control information writing processing on the second MII interface data to obtain the first MII interface data, wherein the control information writing processing comprises replacing idle characters in the second MII interface data with specified control characters.

15. The transmission method of AMCC information of claim 14, wherein: and converting the WDM-PON PMA interface data into 64B/66B interface data, and converting the 64B/66B interface data into the second MII interface data, wherein when the 64B/66B interface data carries AMCC information, idle characters are backfilled after the AMCC information is extracted.

16. The method for transmitting AMCC information according to claim 13 or 14, wherein: the designated control characters include LPI and SEQUENCE control codes.

17. The method for transmitting AMCC information according to claim 12, 13 or 15, wherein: the 64B/66B interface data comprises a synchronization header and a coding block, and when the synchronization header indicates that the coding block is a control code block and the control code block carries a specified code word identifier, the control code block carries the transmitted AMCC information.

18. The method for transmitting AMCC information of claim 17, wherein: the total number of bytes of the coding block is N-8, the designated code word is marked with 1 byte, the total number of bytes of the AMCC information transmitted in the coding block is N, and N is more than or equal to 4 and less than or equal to N-1.

19. The method for transmitting AMCC information according to claim 13 or 15, wherein: the 64B/66B interface data comprises a synchronous header and a coding block;

20. The method for transmitting AMCC information of claim 11, wherein: the first service data stream is an eCPRI signal.

21. A transmission system of AMCC information is arranged in a network device of a wavelength division multiplexing passive optical network WDM-PON, and is characterized in that: the system comprises a transceiver module, a processing module and an AMCC adaptation processing module;

the AMCC adaptation processing module is used for carrying out adaptation processing on the original AMCC data to obtain AMCC information to be transmitted; the AMCC processing module is also used for carrying out adaptation processing on the AMCC information extracted by the processing module;

the processing module comprises:

22. The transmission system of AMCC information of claim 21, wherein the codec unit comprises:

23. The transmission system of AMCC information as recited in claim 22, wherein: the processing module also comprises a control information processing unit which is used for informing the coding and decoding unit to extract and write the specified control character;

the coordination processing unit includes:

24. The transmission system of AMCC information as recited in claim 21, wherein: the processing module also comprises a control information processing unit which is used for informing the coding and decoding unit to extract and write the specified control character;

the encoding and decoding unit includes:

25. The transmission system of AMCC information of claim 24, wherein the WDM-PON processing unit comprises:

26. The transmission system for AMCC information according to any one of claims 23 or 24, wherein: the designated control characters include LPI and SEQUENCE control codes.

27. The transmission system of AMCC information according to claim 22, 23 or 25, wherein: the 64B/66B interface data comprises a synchronous head and a coding block, and when the synchronous head indicates that the coding block is a control code block and the control code block carries a specified code word identifier, the control code block bears the transmitted AMCC information.

28. The transmission system of AMCC information as recited in claim 27, wherein: the total number of bytes of the coding block is N-8, the designated code word is marked with 1 byte, the total number of bytes of the AMCC information transmitted in the coding block is N, and N is more than or equal to 4 and less than or equal to N-1.

29. The transmission system of AMCC information according to claim 23 or 25, wherein: the 64B/66B interface data comprises a synchronous header and a coding block;

30. The transmission system of AMCC information as recited in claim 21, wherein: the service data stream carrying the idle unit received by the transceiver module is an eCPRI signal; and the transceiver module sends the service data stream which is obtained by identifying and extracting the AMCC information from the service data stream carrying the AMCC information and backfilling idle characters by the processing module to an eCPRI signal.