WO2021047663A1 - Procédé, appareil, dispositif et support pour la transmission d'informations oam de fronthaul mobile - Google Patents

Procédé, appareil, dispositif et support pour la transmission d'informations oam de fronthaul mobile Download PDF

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Publication number
WO2021047663A1
WO2021047663A1 PCT/CN2020/114947 CN2020114947W WO2021047663A1 WO 2021047663 A1 WO2021047663 A1 WO 2021047663A1 CN 2020114947 W CN2020114947 W CN 2020114947W WO 2021047663 A1 WO2021047663 A1 WO 2021047663A1
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oam
side device
receiving
sending
block
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PCT/CN2020/114947
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English (en)
Chinese (zh)
Inventor
陈松
张源斌
刘爱华
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中兴通讯股份有限公司
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Publication of WO2021047663A1 publication Critical patent/WO2021047663A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects

Definitions

  • This application relates to the field of communications, such as OAM (Operation Administration and Maintenance, operation, management, and maintenance) information transmission methods, devices, equipment, and media related to mobile fronthaul.
  • OAM Opera Administration and Maintenance, operation, management, and maintenance
  • the mobile fronthaul is the connection between AAU (Active Antenna Unit) and DU (Distributed Unit).
  • Mobile fronthaul solutions include optical fiber direct drive, passive WDM (Wavelength Division Multiplexing) and active OTN (Optical Transport Network, optical transport network), etc.
  • Passive WDM solutions are widely used.
  • Figure 1 is a schematic diagram of a mobile fronthaul semi-passive and semi-active network topology in related technologies. As shown in Figure 1, the network topology includes AAU, OMU (Optical Multiplexing Unit), ODU (Optical Demultiplexing Unit), and DU.
  • the AAU side corresponds to the passive WDM side
  • the DU side corresponds to the active WDM side.
  • the equipment on the passive WDM side Since the equipment on the passive WDM side is located near the base station without the support of the management plane, and the equipment on the passive WDM side is passive, it lacks flexible management of wavelengths and modules, as well as operation and maintenance functions such as performance monitoring, so it cannot be realized Performance monitoring alarms cannot support flexible management at the module level.
  • This application provides a mobile fronthaul OAM information transmission method, device, equipment, and medium, and realizes the management and maintenance of the equipment.
  • the embodiment of the present application provides an OAM information transfer method for mobile fronthaul, which is applied to a sending-side device, and includes:
  • the OAM information is sent to the receiving side device through the OAM channel, so as to realize the OAM function for the sending side device; wherein, the OAM channel is constructed at both ends of the mobile fronthaul.
  • the embodiment of the present application provides an OAM information transmission method for mobile fronthaul, which is applied to a receiving side device, and includes:
  • the OAM information sent by the sending-side device is received through the OAM channel, so as to realize the OAM function for the sending-side device; wherein, the OAM channel is constructed at both ends of the mobile fronthaul.
  • the embodiment of the present application provides an OAM information transmission device for mobile fronthaul, which is configured in a transmitting side device, and includes:
  • the first information sending module is configured to send OAM information to the receiving side device through the OAM channel, so as to realize the OAM function for the sending side device; wherein, the OAM channel is constructed at both ends of the mobile fronthaul.
  • An embodiment of the present application provides an OAM information transmission device for mobile fronthaul, which is configured on a receiving side device, and includes:
  • the first information receiving module is configured to receive OAM information sent by the sending-side device through the OAM channel, so as to implement the OAM function for the sending-side device; wherein, the OAM channel is constructed at both ends of the mobile fronthaul.
  • the embodiment of the present application provides a transmitting-side device, including:
  • One or more processors are One or more processors;
  • Storage device for storing one or more programs
  • the one or more processors When the one or more programs are executed by the one or more processors, the one or more processors implement the OAM information transmission method applied to the mobile fronthaul of the sending-side device as described in the embodiments of the present application .
  • An embodiment of the present application provides a storage medium that stores a computer program that, when executed by a processor, implements the OAM information transmission method applied to the mobile fronthaul of the sending-side device according to the embodiment of the present application .
  • the embodiment of the present application provides a receiving side device, including:
  • One or more processors are One or more processors;
  • Storage device for storing one or more programs
  • the one or more processors When the one or more programs are executed by the one or more processors, the one or more processors implement the OAM information transmission method applied to the mobile fronthaul of the receiving side device as described in the embodiment of the present application .
  • An embodiment of the present application provides a storage medium that stores a computer program, and when the computer program is executed by a processor, implements the OAM information transmission method applied to the mobile fronthaul of the receiving-side device according to the embodiment of the present application .
  • the transmitting-side device sends OAM information to the receiving-side device through the OAM channel constructed at both ends of the mobile fronthaul, thereby realizing the management and maintenance of the device.
  • Figure 1 is a schematic diagram of a mobile fronthaul semi-passive and semi-active network topology in related technologies
  • FIG. 2 is a schematic flow diagram of a mobile fronthaul OAM information transmission method provided by this application.
  • FIG. 3 is a schematic diagram of the effect of inserting OAM packets in the middle of MAC packets provided by this application;
  • FIG. 4 is a schematic diagram of the effect of setting the identification code in the preamble position of the OAM packet provided by this application;
  • FIG. 5 is a schematic diagram of the effect of setting the identification code at the destination address of the OAM packet provided by this application;
  • FIG. 6 is a schematic diagram of the effect of inserting the OAM block according to the period of the first alignment mark provided by this application;
  • FIG. 7 is a schematic diagram of the effect of inserting OAM blocks according to a custom period provided by this application.
  • FIG. 8 is a schematic diagram of the effect of inserting the OAM block after the first alignment mark provided by this application.
  • FIG. 9 is a schematic diagram of the effect of replacing the IDLE block with the OAM block provided by this application.
  • FIG. 10 is a schematic diagram of the effect of inserting an OAM block between the T block and the S block provided by this application;
  • FIG. 11 is a schematic diagram of the effect of inserting the OAM block after the second alignment mark provided by this application.
  • FIG. 12 is a schematic diagram of the effect of wavelength adaptation of the transmitting side device provided by this application.
  • FIG. 13 is a schematic diagram of a link loopback effect provided by this application.
  • FIG. 14 is a schematic diagram of a general format of OAM information provided by this application.
  • FIG. 15 is a schematic diagram of an OAM information format provided by this application.
  • 16 is a schematic flowchart of another OAM information transmission method for mobile fronthaul provided by this application.
  • FIG. 17 is a schematic diagram of an OTDR loopback effect provided by this application.
  • FIG. 18 is a schematic diagram of an Ethernet processing module on the receiving side provided by this application.
  • FIG. 19 is a schematic diagram of a process of decapsulating Ethernet data on the receiving side to the PCS layer provided by this application;
  • FIG. 20 is a schematic diagram of a 100GBASE-R AM encoding provided by this application.
  • Figure 21 is a schematic diagram of a 25GBASE-R CWM encoding provided by this application.
  • FIG. 22 is a schematic structural diagram of a mobile fronthaul OAM information transmission device provided by this application.
  • FIG. 23 is a schematic structural diagram of a signal receiving device provided by this application.
  • FIG. 24 is a schematic structural diagram of a transmitting-side device provided by this application.
  • FIG. 25 is a schematic structural diagram of a receiving-side device provided by this application.
  • FIG. 2 is a schematic flowchart of a mobile fronthaul OAM information transmission method provided by this application. This method can be applied to the case where the sending-side device sends OAM information to the receiving-side device. The method can be executed by the OAM information transmission device of mobile fronthaul provided in the present application, and the OAM information transmission device of mobile fronthaul can be implemented by software and/or hardware and integrated on the sending side equipment.
  • a mobile fronthaul OAM information transmission method includes S110.
  • S110 Send OAM information to the receiving side device through the OAM channel, so as to implement the OAM function for the sending side device.
  • the OAM channel is constructed at both ends of the mobile fronthaul.
  • the device on the receiving side may be a related device on the receiving side of the mobile fronthaul, such as DU, etc.
  • the device on the transmitting side may be a related device on the transmitting side of the mobile fronthaul, such as AAU.
  • the OAM information may include information such as device performance, alarm, wavelength, and maintenance function, and is used to manage and maintain the sending-side device.
  • the embodiment of the present application does not limit the format of the OAM information.
  • OAM channels are constructed at both ends of the mobile fronthaul, so that the sending-side device sends OAM information to the receiving-side device through the OAM channel, thereby realizing the OAM function for the sending-side device to flexibly manage wavelengths and modules , And realize the purpose of equipment performance alarm monitoring.
  • the sending-side device can send OAM information to the receiving-side device through the OAM channel constructed at both ends of the mobile fronthaul, thereby realizing the management and maintenance of the device.
  • the OAM channel is constructed at the MAC (Media Access Control Address) layer at both ends of the mobile fronthaul; the sending of OAM information to the receiving side device through the OAM channel may include: processing Ethernet Data to obtain a MAC packet; insert an OAM packet in the interval between two MAC packets according to a first preset period; wherein, the OAM packet is identified by a set identification code; and the OAM channel is sent to the receiving device through the OAM channel.
  • OAM package may be used to process Ethernet Data to obtain a MAC packet; insert an OAM packet in the interval between two MAC packets according to a first preset period; wherein, the OAM packet is identified by a set identification code; and the OAM channel is sent to the receiving device through the OAM channel.
  • the first preset period may be a fixed period set according to implementation requirements, such as every 100 MAC packets as the first preset period.
  • the set identification code can be an identification code used to identify the OAM package, and any identification code that can be used to identify the OAM packet can be used as the set identification code. This application does not limit the type and content of the set identification code.
  • the OAM channel can be constructed based on the MAC layers at both ends of the mobile fronthaul.
  • the sending-side device can process the Ethernet data to obtain the MAC packet, insert an OAM packet in the interval between the two MAC packets according to the first preset period, and distinguish the OAM packet from the ordinary Ethernet MAC packet by setting the identification code.
  • Figure 3 is a schematic diagram of the effect of inserting OAM packets in the middle of the MAC packet provided by this application. As shown in Figure 3, after the sending side device inserts the OAM packet in the MAC packet interval, the OAM packet can be processed by the bottom layer and combined Send to the receiving device.
  • the preamble, delimiter, destination address, source address, length/type, data packet, and frame check sequence are the fields of the MAC packet.
  • the set identification code is located at the position of the preamble or the destination address of the OAM packet.
  • FIG. 4 is a schematic diagram of the effect provided by this application where the identification code is located at the preamble position of the OAM packet
  • FIG. 5 is a schematic diagram of the effect provided by this application where the identification code is located at the destination address of the OAM packet.
  • the set identification code may be located in the position of the preamble of the OAM packet or the position of the destination address.
  • the identification code When the identification code is set at the position of the preamble, one or more bytes of the preamble can be occupied, as shown in Figure 4, the first byte of the preamble is occupied; when the identification code is set at the position of the destination address, set The given identification code can be used as a special MAC address and is different from the commonly used MAC address.
  • the OAM channel is constructed at the PCS (Process Control System) layer at both ends of the mobile fronthaul; the sending of OAM information to the receiving side device through the OAM channel may include: processing Ethernet data PCS layer data; insert the OAM block according to the first alignment identifier of the PCS layer data; send the OAM block to the receiving side device through the OAM channel.
  • PCS Process Control System
  • the first alignment mark may be an alignment mark included in the PCS layer data, such as an AM (Alignment Marker, alignment mark) in the PCS layer data.
  • AM Alignment Marker, alignment mark
  • the OAM channel may also be constructed between the PCS layers at both ends of the mobile fronthaul.
  • the sending-side device and the receiving-side device can transmit OAM frames in the OAM channel, and an OAM frame includes one or more OAM blocks.
  • the OAM block can be a data block or a control block.
  • the sending-side device may insert the OAM block according to the first alignment identifier, and send the OAM block to the receiving-side device through the OAM channel.
  • inserting the OAM block according to the first alignment identifier of the PCS layer data may include: in a case where it is determined that the PCS layer data includes the first alignment identifier, in the second preset period The OAM block is inserted after the first alignment identifier; wherein, in the case that the second preset period is a custom period, the OAM block is identified by setting an identifier header.
  • the second preset period may be a custom period or a period of the first alignment mark, which is not limited in the embodiment of the present application.
  • the set identification header may be an identification header used to identify the OAM block, and the embodiment of the application does not limit the content of the set identification header.
  • the sending-side device inserts the OAM block according to the first alignment identifier of the PCS layer data
  • the OAM block may be inserted after the first alignment mark according to the second preset period.
  • FIG. 6 is a schematic diagram of the effect of inserting the OAM block according to the period of the first alignment mark provided by this application
  • FIG. 7 is a schematic diagram of the effect of inserting the OAM block according to a custom period provided by this application.
  • the transmitting-side device may periodically insert the OAM block after the first alignment mark according to the period of the first alignment mark, and may insert the OAM block in the first channel or all channels.
  • the sending-side device can also insert an OAM block after the first alignment mark according to a custom cycle, and define a set identification header for the OAM block that distinguishes the data block from other control blocks, so as to set the identification header Identify the OAM block.
  • the OAM block according to the first alignment identifier of the PCS layer data may include deleting a part of IDLE (idle state) blocks in the PCS layer data.
  • FIG. 8 is a schematic diagram of the effect of inserting the OAM block after the first alignment mark provided by this application.
  • the PCS layer data includes the first alignment mark
  • the sending-side device follows the second preset After the period is inserted into the OAM block after the first alignment mark, part of the IDLE block in the PCS layer data can be subsequently deleted for rate compensation.
  • inserting the OAM block according to the first alignment identifier of the PCS layer data may include: in a case where it is determined that the PCS layer data does not include the first alignment identifier, according to a third preset period The idle IDLE block between the T block and the S block in the PCS layer data is replaced with the OAM block; wherein, the OAM block is identified by setting an identification header.
  • the third preset period may be a custom period, which is not limited in the embodiment of the present application.
  • the OAM channel can transmit one or more OAM blocks, and the OAM blocks can be distinguished by setting the identifier header and other control blocks.
  • Figure 9 is a schematic diagram of the effect of replacing the IDLE block with the OAM block provided by this application.
  • the sending-side device can periodically change the interval between the T block and the S block in the PCS layer data according to a custom period. Replace the IDLE block with OAM block.
  • the inserting the OAM block according to the first alignment identifier of the PCS layer data may include: determining that the third preset period is reached, and the T block and the S block do not include In the case of the IDLE block, the OAM block is inserted between the T block and the S block.
  • the third preset period may also be the period of the OAM block, which is not limited in the embodiment of the present application.
  • Figure 10 is a schematic diagram of the effect of inserting an OAM block between the T block and the S block provided by this application. As shown in Figure 10, if the PCS layer data does not include the first alignment identifier, if the sending device determines the PCS If the IDLE block is not included between the T block and the S block in the layer data, the OAM block can be inserted between the T block and the S block when the OAM block period is reached.
  • the OAM block according to the first alignment identifier of the PCS layer data may include: deleting a part of IDLE blocks in the PCS layer data.
  • the sending-side device determines that the third preset period is reached, and the IDLE block is not included between the T block and the S block, it will be set between the T block and the S block. After inserting the OAM block in between, part of the IDLE block in the PCS layer data can be subsequently deleted for rate compensation.
  • the OAM channel is constructed on the FEC (Forward Error Correction) layer at both ends of the mobile fronthaul;
  • the sending of OAM information to the receiving device through the OAM channel may include: processing Ethernet data Obtain FEC layer data; insert an OAM block according to the second alignment identifier of the FEC layer data; send the OAM block to the receiving side device through the OAM channel.
  • FEC Forward Error Correction
  • the second alignment identifier may be an alignment identifier included in the FEC layer data, such as CWM (Codeword Marker) in the FEC layer data.
  • CWM Codeword Marker
  • the OAM channel can also be constructed based on the FEC layers at both ends of the mobile fronthaul.
  • the transmitting side device and the receiving side device can transmit OAM frames in the OAM channel.
  • An OAM frame contains one or more OAM blocks.
  • the sending side device can process the Ethernet data to obtain FEC layer data, insert the OAM block according to the second alignment identifier of the FEC layer data, and send the OAM block to the receiving side device through the OAM channel.
  • the inserting of the OAM block according to the second alignment identifier of the FEC layer data may include: in the case where it is determined that the FEC layer data does not include the second alignment identifier, performing comparison of the FEC layer data
  • the PCS layer data is processed to obtain the PCS layer data;
  • the PCS layer data is processed according to the preset data processing method to obtain the processed PCS layer data; wherein the preset data processing method includes code block synchronization and alignment locking; according to the second
  • the preset period is inserted into the OAM block after the first alignment identifier in the processed PCS layer data; wherein, when the second preset period is a custom period, the OAM block is set Identifies the header ID.
  • the sending side device can perform channel alignment rearrangement, RS-FEC (Reed Solomon FEC, Reed-Solomon forward error correction) for the FEC layer data. ) After decoding and transcoding from 256b/257b to 64b/66b, the data is distributed to the PCS layer. After the PCS layer data is processed by channel code block synchronization, alignment locking, etc., the sending-side device can follow the above-mentioned method based on the construction of the OAM channel between the PCS layers at the two ends of the mobile fronthaul, such as periodically aligning in the first according to the period of the first alignment mark.
  • RS-FEC Random Solomon FEC, Reed-Solomon forward error correction
  • the transmitting-side device may subsequently delete part of the IDLE block in the PCS layer data to perform rate compensation. Then, the sending-side device can scramble, encapsulate the data with the OAM block, process the FEC layer, PMA (Physical Media Attachment, physical media adaptation layer) and PMD (Physical Media Dependent, physical media association layer interface) and send it to Receiving side equipment.
  • PMA Physical Media Attachment, physical media adaptation layer
  • PMD Physical Media Dependent, physical media association layer interface
  • inserting the OAM block according to the second alignment identifier of the FEC layer data may include: in a case where it is determined that the FEC layer data includes the second alignment identifier, in the fourth preset period Insert the OAM block after the second alignment mark; wherein, the OAM block is identified by setting an identification header.
  • the fourth preset period may be a period of the second alignment mark or a custom period, which is not limited in the embodiment of the present application.
  • the sending-side device may periodically insert the OAM block after the second alignment identifier according to the period of the second alignment identifier, and the OAM block may be inserted in the first channel or all The channels are inserted into OAM blocks.
  • the sending-side device may also insert the OAM block after the second alignment mark according to the custom period, and define a set identification header for distinguishing the data block and other control blocks for the OAM block, so as to identify the OAM block through the set identification header.
  • the inserting the OAM block after the second alignment identifier according to the fourth preset period may include: inserting the second alignment identifier into the PCS layer data corresponding to the FEC layer data In the case of deleting part of IDLE blocks in the PCS layer data.
  • FIG. 11 is a schematic diagram of the effect of inserting the OAM block after the second alignment mark provided by this application.
  • the sending-side device inserts after the second alignment mark according to the fourth preset period.
  • part of the IDLE block in the PCS layer data can be subsequently deleted for rate compensation.
  • the sending-side device may delete part of IDLE blocks in the PCS layer data while inserting the second alignment identifier into the PCS layer data corresponding to the FEC layer data.
  • the IDLE block can be replaced by the OAM block, or the OAM block can be inserted between the T block and the S block, or it can also be
  • the method of inserting the OAM block after aligning the mark is realized, and the method is flexible and diverse. For example, inserting OAM after the alignment mark (AM or CWM), and inserting the OAM according to the period of the alignment mark, can strictly guarantee the period, and does not require descrambling, and the processing is relatively simple.
  • the OAM information transmission method of mobile fronthaul may further include: receiving the first Ethernet frame sent by the receiving-side device through the OAM channel; parsing the first Ethernet frame to obtain the first OAM information; The first receiving wavelength included in the first OAM information is tuned to the second transmitting wavelength; the second transmitting wavelength and the second receiving wavelength are added to the second OAM information; the second OAM information is inserted into the second The Ethernet frame is fed back to the receiving device through the OAM channel.
  • the first Ethernet frame may be an Ethernet frame sent by the receiving-side device to the sending-side device.
  • the first OAM information may be OAM information included in the first Ethernet frame.
  • the first receiving wavelength may be a receiving wavelength configured by the receiving-side device, and the first transmitting wavelength may be a transmitting wavelength configured by the receiving-side device.
  • the second receiving wavelength may be a receiving wavelength configured by the transmitting-side device, and the second transmitting wavelength may be a transmitting wavelength configured by the transmitting-side device.
  • the second OAM information may be OAM information sent by the sending-side device, and the second Ethernet frame may be an Ethernet frame sent by the sending-side device to the receiving-side device.
  • FIG. 12 is a schematic diagram of the effect of wavelength adaptation of the transmitting side device provided by this application.
  • the receiving side device DU can manually configure the first transmitting wavelength ⁇ 1 and the first receiving wavelength ⁇ 2 through the network management. , And insert the first transmission wavelength ⁇ 1 and the first reception wavelength ⁇ 2 into the first Ethernet frame in the form of the first OAM information and send them to the transmitting-side device AAU.
  • the first receiving wavelength ⁇ 2 is a wavelength that needs to be configured by the AAU on the transmitting side.
  • the transmitting-side device AAU receives the first Ethernet frame sent by the receiving-side device DU, decodes the first OAM information, tunes its own wavelength according to the tuning step, and sets the second transmission wavelength ⁇ 3 and the second reception wavelength ⁇ 4 is inserted into the second Ethernet frame in the form of second OAM information and fed back to the receiving device DU.
  • the second transmission wavelength ⁇ 3 is equal to the first reception wavelength ⁇ 2, and the second reception wavelength ⁇ 4 is equal to the first transmission wavelength ⁇ 1.
  • the OAM information transmission method of mobile fronthaul may further include: receiving the Ethernet frame sent by the receiving side device through the OAM channel; parsing the Ethernet frame to obtain OAM information; identifying the OAM information in the OAM information Link loopback switch field; when it is determined that the field value corresponding to the link loopback switch field is the first value, perform loopback processing; when it is determined that the field value corresponding to the link loopback switch field is the first value In the case of two values, the loopback processing is canceled.
  • the first numerical value and the second numerical value may be numerical values set according to actual requirements.
  • the first numerical value is 1, and the second numerical value is 0, which is not limited in the embodiment of the present application.
  • sending OAM information through the OAM channel can also implement fault location of the device.
  • FIG. 13 is a schematic diagram of a link loopback effect provided by this application.
  • the receiving side device DU sends the Ethernet frame to the sending side device AAU through the OAM channel.
  • the sending-side device AAU parses the Ethernet frame to obtain the link loopback switch field in the OAM information. If the link loopback switch field is 1, the sending-side device AAU performs loopback processing at the OAM Block (OAM block); if the link loopback switch field is 0, the sending-side device AAU cancels the loopback processing.
  • OAM Block OAM Block
  • the OAM information may include an OAM identification header, a performance field, an alarm field, a wavelength field, and a maintenance function field;
  • the performance field includes input optical power, output optical power, laser bias current, internal module At least one of temperature, error code statistics, and error packet statistics;
  • the warning field includes input no light warning indication, input low light warning indication, input strong light warning indication, output no light warning indication, output low light warning indication, At least one of output strong light alarm indication, excessive bias current alarm indication, module temperature over-limit alarm indication, local connection failure alarm indication, remote connection failure alarm indication, connection failure alarm indication and synchronization loss alarm indication;
  • the wavelength field includes at least one of a module transmitting wavelength and a module receiving wavelength;
  • the maintenance function field includes at least one of a wavelength lock flag and a link loopback switch.
  • FIG. 14 is a schematic diagram of a general format of OAM information provided by this application.
  • OAM information may include but not limited to OAM header, performance field, alarm field, wavelength field, maintenance function field, etc.
  • FIG. 15 is a schematic diagram of an OAM information format provided by this application.
  • OAM information may include, but is not limited to, 1-byte input optical power, 1-byte output optical power, 1-byte laser bias current, 1-byte module internal temperature, and 1-bit input No light warning indication, 1 bit input low light warning indication, 1 bit input strong light warning indication, 1 bit output no light warning indication, 1 bit output low light warning indication, 1 bit output strong light warning indication, 1 bit bias current Oversized alarm indication, 1-bit module temperature over-limit alarm indication, 7-bit module transmit wavelength, 7-bit module receive wavelength, 1-bit wavelength lock flag, 1-bit link loopback switch, 2-byte Bip (Bit Interleaving Parity, bit Interleaved parity check code) error statistics, 2-byte error packet statistics, 1-bit connection local failure warning indication, 1-bit connection remote failure warning indication, 1-bit connection failure warning indication, and 1-bit synchronization loss warning indication.
  • 1-bit module temperature over-limit alarm indication 7-bit module transmit wavelength, 7-bit module receive wavelength, 1-bit wavelength lock flag, 1-bit link loopback switch, 2-byte Bip (Bit Interleaving Parity, bit Interlea
  • Input optical power, output optical power, laser bias current, module internal temperature, Bip error statistics, error packet statistics are used for the performance monitoring of the transmitting side equipment (ie passive WDM side equipment); the module transmitting wavelength and module receiving wavelength are used Flexible management of the wavelength of the transmitting-side equipment (ie, passive WDM-side module); no light, weak light, strong light input/output, internal temperature of the module is too high, bias current is too large, local connection failure/remote failure, connection Failure, synchronization loss is used for the alarm monitoring of the transmitting side device (ie passive WDM side device), the wavelength lock mark is used for the update of the result of the wavelength negotiation of the port matched by the receiving side device and the transmitting side device, and the link loopback switch is used for sending The side device OAM Block loopback is used to locate the fault, that is, locate whether the fault comes from a wireless device or a wired device.
  • the sending side device For input and output optical power, laser bias current, module internal temperature, Bip error statistics and error packet statistics, etc., as well as input/output no light, weak light, strong light alarms, module temperature limit alarms, bias currents
  • the sending side device encapsulates the above OAM information into an Ethernet frame and sends it to the receiving side device.
  • the receiving side device parses the Ethernet frame to obtain OAM information, and can obtain related information of the sending side device according to these performance and alarms, so as to grasp the device status of the sending side device. Once the receiving-side device determines that an abnormal situation occurs according to the received OAM information, corresponding countermeasures can be taken in advance, so as to achieve flexible management of the sending-side device.
  • FIG. 16 is a schematic flowchart of a mobile fronthaul OAM information transmission method provided by this application. This method can be applied to the situation where the receiving side device sends OAM information to the sending side device. The method can be executed by the mobile fronthaul OAM information delivery device provided in this application, and the mobile fronthaul OAM information delivery device can be implemented by software and/or hardware. , And integrated on the receiving side equipment. For the content that has not been described in this embodiment, reference may be made to the above embodiment, which will not be repeated here.
  • the OAM information transmission method of mobile fronthaul provided by the present application includes S210.
  • S210 Receive OAM information sent by the sending-side device through an OAM channel, so as to implement an OAM function for the sending-side device.
  • the OAM channel is constructed at both ends of the mobile fronthaul.
  • the device on the receiving side may be a related device on the receiving side of the mobile fronthaul, such as DU, etc.
  • the device on the transmitting side may be a related device on the transmitting side of the mobile fronthaul, such as AAU.
  • the OAM information may include information such as device performance, alarm, wavelength, and maintenance function, and is used to manage and maintain the sending-side device.
  • the embodiment of the present application does not limit the format of the OAM information.
  • the receiving side device can receive the OAM information sent by the sending side device through the OAM channel, thereby realizing the OAM function for the sending side device to flexibly manage wavelengths and modules , And realize the purpose of equipment performance alarm monitoring.
  • the receiving-side device can receive OAM information sent by the sending-side device through the OAM channel constructed at both ends of the mobile fronthaul, thereby realizing the management and maintenance of the device.
  • the OAM channel is constructed on the MAC layers at both ends of the mobile fronthaul; the receiving OAM information sent by the sending-side device through the OAM channel may include: receiving the OAM information sent by the sending-side device through the OAM channel Original data; parsing the original data to obtain MAC layer data; identifying the MAC layer data according to a set identification code to obtain an OAM packet; extracting field information in the OAM packet to obtain the device status of the sending-side device.
  • the receiving device can parse the original data to obtain the MAC layer data after receiving the original data sent by the sending device through the OAM channel. And according to the set identification code to identify the OAM packet in the MAC layer data, and extract the field information in the OAM packet to obtain the device status of the sending side device, so as to realize the management and maintenance of the sending side device.
  • the set identification code is located at the position of the preamble or the destination address of the OAM packet.
  • the set identification code may be located in the position of the preamble of the OAM packet or the position of the destination address.
  • the identification code When the identification code is set at the position of the preamble, one or more bytes of the preamble can be occupied, as shown in Figure 4, the first byte of the preamble is occupied; when the identification code is set at the position of the destination address, set The given identification code can be used as a special MAC address and is different from the commonly used MAC address.
  • the receiving device can parse the original data to obtain the PCS layer data after receiving the original data sent by the sending device through the OAM channel, and according to the PCS layer
  • the data extracts the field information in the OAM information to obtain the device status of the sending-side device, so as to realize the management and maintenance of the sending-side device.
  • the extracting field information in the OAM information according to the PCS layer data may include: locating the OAM block according to the first alignment identifier in the PCS layer data; extracting the fields in the OAM block information.
  • the receiving side device can locate the OAM block according to the first alignment mark in the PCS layer data, that is, locate the OAM block by locking the first alignment mark, and extract the OAM block Field information.
  • the extracting field information in the OAM packet according to the PCS layer data may include: identifying an OAM block from the PCS layer data according to a set identification header; extracting information in the OAM block Field information.
  • the receiving side device can identify the OAM block from the PCS layer data according to the set identifier header, and extract field information in the OAM block.
  • the OAM channel is constructed at the FEC layer at both ends of the mobile fronthaul; the receiving OAM information sent by the sending-side device through the OAM channel may include: receiving the OAM information sent by the sending-side device through the OAM channel Original data; parsing the original data to obtain FEC layer data; extracting field information in the OAM information according to the FEC layer data to obtain the device status of the sending-side device.
  • the receiving device can parse the original data to obtain the FEC layer data after receiving the original data sent by the sending device through the OAM channel.
  • the data extracts the field information in the OAM information to obtain the device status of the sending-side device, so as to realize the management and maintenance of the sending-side device.
  • the extracting field information in the OAM information according to the FEC layer data may include: processing the FEC layer data to obtain PCS layer data; according to the first alignment in the PCS layer data Identify the positioning OAM block; extract field information in the OAM block.
  • the receiving side device may process the FEC layer data to obtain PCS layer data.
  • the receiving side device may perform RS-FEC layer processing on the FEC layer data to Obtain PCS layer data, and locate the OAM block according to the first alignment identifier in the PCS layer data to extract field information in the OAM block.
  • the extracting field information in the OAM packet according to the PCS layer data may include: locating an OAM block according to a second alignment identifier in the FEC layer data; extracting fields in the OAM block information.
  • the receiving device does not need to process the FEC layer data to obtain the PCS layer data, and can directly locate the OAM block according to the second alignment mark in the FEC layer data to extract the OAM block The field information.
  • the OAM information transmission method of the mobile fronthaul may further include: configuring a first emission wavelength and a first reception wavelength; adding the first emission wavelength and the first reception wavelength to the first OAM information Add the first OAM information to the first Ethernet frame and send it to the sending-side device through the OAM channel; receive the second Ethernet frame fed back by the sending-side device through the OAM channel; The second Ethernet frame acquires second OAM information; in the case where it is determined that the wavelength tuning of the transmitting-side device is successful according to the second OAM information, the first lock flag is used to update the wavelength lock flag; otherwise, the second lock flag is used Update the wavelength lock flag, and return to perform the operation of configuring the first transmission wavelength and the first reception wavelength.
  • FIG. 12 is a schematic diagram of the effect of wavelength adaptation of the transmitting side device provided by this application.
  • the receiving side device DU can manually configure the first transmitting wavelength ⁇ 1 and the first receiving wavelength ⁇ 2 through the network management. , And insert the first transmission wavelength ⁇ 1 and the first reception wavelength ⁇ 2 into the first Ethernet frame in the form of the first OAM information and send them to the transmitting-side device AAU.
  • the first receiving wavelength ⁇ 2 is a wavelength that needs to be configured by the AAU on the transmitting side.
  • the transmitting-side device AAU receives the first Ethernet frame sent by the receiving-side device DU, analyzes the first OAM information, tunes its own wavelength according to the tuning step, and sets the second transmission wavelength ⁇ 3 and the second reception wavelength ⁇ 4 is inserted into the second Ethernet frame in the form of second OAM information and fed back to the receiving device DU.
  • the second transmission wavelength ⁇ 3 is equal to the first reception wavelength ⁇ 2, and the second reception wavelength ⁇ 4 is equal to the first transmission wavelength ⁇ 1.
  • the actual transmission wavelength of the transmitting-side device AAU after wavelength tuning may not necessarily be the first receiving wavelength ⁇ 2.
  • the receiving-side device DU After the receiving-side device DU receives the second Ethernet frame fed back by the transmitting-side device AAU, it decodes the second OAM information and determines that the second transmission wavelength ⁇ 3 is equal to the first reception wavelength ⁇ 2, and the second reception wavelength ⁇ 4 is equal to the first transmission wavelength.
  • ⁇ 1 it means that the port of the transmitting-side device AAU matches the port of the receiving-side device DU, that is, the fiber connection is paired.
  • the wavelength lock flag bit of the receiving device DU is updated to 0, and the sending The AAU on the side device continues to perform wavelength tuning according to the step length, and so on, until the actual wavelength received by the device on the transmitting side AAU is equal to the first receiving wavelength ⁇ 2. At this time, it indicates that the wavelength of the port paired by the device on the transmitting side AAU is successfully tuned, and the receiving side is updated.
  • the wavelength lock flag bit of the device DU is 1.
  • the OAM information transmission method of the mobile fronthaul may further include: determining the source of the fault when it is determined that the sending-side device performs loopback processing, and the receiving-side device sends to the receiving-side device and the receiving link is unblocked In the wireless device; in the case where it is determined that the sending-side device performs loopback processing, and the receiving-side device sends to the receiving-side device, the receiving link is not clear, determine that the fault originates from the wired device.
  • the receiving side device can determine that the fault comes from the wireless device; if The link between DU transmission and DU reception is unavailable, and the receiving device can determine that the fault is from the wired device.
  • the determining that the fault originates from a wired device may include: transmitting to the optical multiplexing unit OMU and optical demultiplexing unit ODU in the mobile fronthaul through an OTDR (Optical Time Domain Reflectometer, OTDR) Light; when it is determined that the OTDR receives the light looped back by the OMU, it is determined that the fault originates from the optical module device; when it is determined that the OTDR does not receive the light looped back by the OMU, the source of the fault is determined Yuguang line.
  • OTDR Optical Time Domain Reflectometer
  • FIG. 17 is a schematic diagram of an OTDR loopback effect provided by this application. As shown in FIG. 17, the light emitted by the OTDR passes through the OMU and the ODU and loops back from the OMU, and the OTDR detects the loopback condition. If it is determined that the OTDR receives the light that is looped back by the OMU, it is determined that the link is smooth, indicating that the optical line is not faulty, and the fault originates from the optical module device. If the OTDR does not receive the light looped back by the OMU, it is determined that the link is not smooth, indicating that the fault originates from the optical line.
  • the OAM information may include an OAM identification header, a performance field, an alarm field, a wavelength field, and a maintenance function field;
  • the performance field includes input optical power, output optical power, laser bias current, internal module At least one of temperature, error code statistics, and error packet statistics;
  • the warning field includes input no light warning indication, input low light warning indication, input strong light warning indication, output no light warning indication, output low light warning indication, At least one of output strong light alarm indication, excessive bias current alarm indication, module temperature over-limit alarm indication, local connection failure alarm indication, remote connection failure alarm indication, connection failure alarm indication and synchronization loss alarm indication;
  • the wavelength field includes at least one of a module transmitting wavelength and a module receiving wavelength;
  • the maintenance function field includes at least one of a wavelength lock flag and a link loopback switch.
  • OAM information may include but is not limited to OAM identification header, performance field, alarm field, wavelength field, and maintenance function field.
  • OAM information can include, but is not limited to, 1-byte input optical power, 1-byte output optical power, 1-byte laser bias current, 1-byte module internal temperature, 1-bit input no-light alarm indication, 1 bit input low light alarm indicator, 1 bit input strong light alarm indicator, 1 bit output no light alarm indicator, 1 bit output low light alarm indicator, 1 bit output strong light alarm indicator, 1 bit bias current excessive alarm indicator, 1-bit module temperature limit alarm indication, 7-bit module transmit wavelength, 7-bit module receive wavelength, 1-bit wavelength lock mark, 1-bit link loopback switch, 2-byte Bip error statistics, 2-byte error packet Statistics, 1-bit connection local failure warning indication, 1-bit connection remote failure warning indication, 1-bit connection failure warning indication, and 1-bit synchronization loss warning indication.
  • Input optical power, output optical power, laser bias current, module internal temperature, Bip error statistics, error packet statistics are used to monitor the performance of the transmitting side equipment, that is, the passive WDM side equipment; the module transmitting wavelength and the module receiving wavelength are used for transmitting
  • the side device is the flexible management of the wavelength of the passive WDM side module; the input/output is no light, weak light, strong light, the internal temperature of the module exceeds the limit, the bias current is too large, the local connection failure/remote failure, the connection failure, the synchronization loss It is used for the alarm monitoring of the transmitting side equipment, that is, the passive WDM side equipment.
  • the wavelength lock mark is used to update the results of the wavelength negotiation between the receiving side equipment and the transmitting side equipment.
  • the link loopback switch is used for the transmitting side equipment OAM Block loopback. , The role is to locate the fault, that is, locate whether the fault comes from a wireless device or a wired device.
  • the sending side device For input and output optical power, laser bias current, module internal temperature, Bip error statistics and error packet statistics, etc., as well as input/output no light, weak light, strong light alarms, module temperature limit alarms, bias currents
  • the sending side device encapsulates the above OAM information into an Ethernet frame and sends it to the receiving side device.
  • the receiving side device parses the Ethernet frame to obtain OAM information, and can obtain related information of the sending side device according to these performance and alarms, so as to grasp the device status of the sending side device. Once the receiving-side device determines that an abnormal situation occurs according to the received OAM information, corresponding countermeasures can be taken in advance, so as to achieve flexible management of the sending-side device.
  • the following exemplarily describes the transmission of OAM information through the OAM channel based on the sending-side device and the receiving-side device.
  • FIG. 18 is a schematic diagram of an Ethernet processing module on the receiving side provided by this application.
  • the Evolved Common Public Radio Interface (eCPRI) Fronthaul network transmission interface standard
  • 25 Gigabit Ethernet (25GE) signals are first processed by the PMD layer and PMA layer, and then sent to the FEC layer.
  • the FEC layer receives the data from the PMA layer, and passes the CWM alignment and FEC.
  • the data is distributed to the PCS layer; after the PCS layer processes the received data through block synchronization and descrambling, data in units of 64b/66b is obtained
  • the stream is then decoded by 64b/66b, and sent to the Reconciliation Sublay-er (RS) through the 25 Gigabit Medium Independent Interface (25GMII).
  • RS Reconciliation Sublay-er
  • 25GMII 25 Gigabit Medium Independent Interface
  • Get the MAC packet Get the MAC packet.
  • the device on the sending side can insert an OAM packet at the interval between two MAC packets according to a fixed period.
  • the OAM packet can be encapsulated in the form of a MAC packet, and the first byte of the preamble can be added with an identification code that is different from other MAC packets. 0x6d.
  • the transmitting-side device AAU then sends the MAC layer signal encapsulated with the OAM packet through the RS, PCS, FEC, PMA, and PMD layer processing
  • the receiving-side device DU After receiving the Ethernet signal from the AAU side, the receiving-side device DU obtains a serial MAC packet after decapsulating at various levels of PMD, PMA, FEC, PCS, and RS.
  • the OAM packet is found by searching whether the first byte of the preamble is the identification code 0x6d, and the performance, alarm, wavelength, and maintenance function fields in the OAM packet are analyzed to obtain the device status of the AAU on the sending side. For example, for the status of the optical module, determine whether the optical module is faulty according to the performance field and the alarm field in the OAM information, and whether the direct connection between the optical module and the optical fiber is normal. If an abnormality is found, the optical module and the optical fiber can be replaced in advance.
  • the function of performing wavelength negotiation with the sending-side device AAU can be achieved.
  • the maintenance function field in the OAM information it can be used for functions such as wavelength negotiation handshake and fault location.
  • FIG. 19 is a schematic diagram of the process of decapsulating Ethernet data from the receiving side to the PCS layer provided by this application.
  • the 100GE Ethernet signal of the transmitting side device AAU first passes through the PMD layer and PMA. After layer processing, it is sent to the FEC layer.
  • the FEC layer receives the data from the PMA layer.
  • CWM alignment, FEC decoding, descrambling, and 256b/257b to 64b/66b transcoding the data is distributed to the PCS layer.
  • the AM block of the first channel is searched according to a fixed cycle after block synchronization.
  • FIG. 20 is a schematic diagram of a 100GBASE-R AM encoding provided by this application, and the encoding value of the AM block is shown in FIG. 20.
  • the OAM block is inserted after the AM block.
  • the inserted OAM block has a special OAM identification header, that is, the block type field after 64b/66b encoding is unique, such as 0x6d.
  • the PCS layer scrambling, distribution processing, FEC, PMA, PMD processing to send out the Ethernet signal.
  • the receiving device DU After receiving the Ethernet signal from the transmitting device AAU, the receiving device DU obtains the PCS layer signal after decapsulation at various levels of PMD, PMA, and FEC, and then undergoes block synchronization and alignment lock processing. After the receiving device DU performs alignment and locking, it finds the AM block of the first channel, searches for the OAM block by the block type value "0x6d", and analyzes the performance, alarm, wavelength, maintenance function and other fields in the OAM block to obtain the sender device AAU The condition of the equipment. For example, for the status of the optical module, determine whether the optical module is faulty according to the performance field and alarm field in the OAM information, and whether the direct connection between the optical module and the optical fiber is normal.
  • the optical module and optical fiber can be replaced in advance.
  • the function of performing wavelength negotiation with the sending-side device AAU can be achieved.
  • the maintenance function field in the OAM information it can be used for functions such as wavelength negotiation handshake and fault location.
  • the eCPRI (25GE) Ethernet signal of the sending-side device AAU is first processed by the PMD layer and the PMA layer, and then sent to the FEC layer.
  • the FEC layer first undergoes codeword markers synchronization and channel rearrangement processing. Then search for the CWM block of the first channel.
  • FIG. 21 is a schematic diagram of a 25 Gigabit Ethernet code sub-mark (25GBASE-R CWM) encoding provided by this application, and the encoding value of the CWM block is shown in FIG. 21.
  • the transmitting-side device AAU inserts an OAM frame after the CWM block according to the insertion period of the CWM block.
  • An OAM frame includes one or more OAM blocks.
  • the Ethernet signal is sent out through scrambling, distribution processing, PMA and PMD processing.
  • the receiving device DU After receiving the Ethernet signal sent by the transmitting device AAU, the receiving device DU obtains the FEC layer signal after decapsulation at each level of PMD and PMA, and then synchronizes with the Codeword marker, and finds it after the second alignment mark CWM is locked
  • the CWM of the first channel parses the OAM information behind the CWM, such as the performance field, the alarm field, the wavelength field, and the maintenance function field. According to the analysis of these fields, the device status of the sending-side device AAU is obtained.
  • the AAU management of the transmitting side device can be better achieved, and the fault can be effectively located. That is, the passive part only needs simple processing such as loopback and marking for OAM Block.
  • the OAM information defines the link loopback switch, wavelength lock mark, over-limit alarms for optical power, current, and internal temperature of the module, etc., through the marks of these fields, for example, the field value is "1" or "0", and pass
  • the receiving-side device DU can better grasp the device status of the sending-side device AAU and the information interaction between the receiving-side device DU and the sending-side device AAU.
  • the passive part Since the computing power and processing power of the passive part is far weaker than the active part, and the functions that require strong computing power and processing power such as delay and time synchronization are placed outside the passive device (that is, the active part) to complete Yes, so the passive part does not need to perform all the processing involved in the OAM information. That is, although the passive part adds some OAM processing, the burden caused by it is relatively small, which greatly reduces the complexity of the hardware circuit.
  • FIG. 22 is a schematic structural diagram of an OAM information transfer device for mobile fronthaul provided by this application.
  • the OAM for mobile fronthaul in an embodiment of this application
  • the information transmission device can be integrated on the sending side equipment.
  • the device includes: a first information sending module 31, configured to send OAM information to the receiving side device through an OAM channel, so as to realize the OAM function for the sending side device; wherein, the OAM channel is constructed at both ends of the mobile fronthaul.
  • the OAM information transmission device of mobile fronthaul provided in this embodiment is used to implement the OAM information transmission method of mobile fronthaul of this application.
  • the implementation principle of the OAM information transmission device of mobile fronthaul provided in this embodiment is the same as the OAM information transmission of mobile fronthaul of this application. The method is similar, so I won't repeat it here.
  • the OAM channel is constructed on the MAC layer at both ends of the mobile fronthaul;
  • the first information sending module 31 includes: a first OAM information sending unit configured to process Ethernet data to obtain MAC packets; Periodically insert an OAM packet in the interval between two MAC packets; wherein the OAM packet is identified by a set identification code; and the OAM packet is sent to the receiving-side device through the OAM channel.
  • the set identification code is located at the position of the preamble or the destination address of the OAM packet.
  • the OAM channel is constructed at the PCS layer at both ends of the mobile fronthaul;
  • the first information sending module 31 includes: a second OAM information sending unit configured to process Ethernet data to obtain PCS layer data; according to the PCS The first alignment identifier of the layer data is inserted into the OAM block; the OAM block is sent to the receiving side device through the OAM channel.
  • the second OAM information sending unit is configured to insert the OAM after the first alignment identifier according to a second preset period when it is determined that the PCS layer data includes the first alignment identifier. Block; wherein, in the case that the second preset period is a custom period, the OAM block is identified by setting an identification header.
  • the second OAM information sending unit is configured to, in a case where it is determined that the PCS layer data does not include the first alignment identifier, transmit T blocks and S in the PCS layer data according to a third preset period.
  • the IDLE block between the blocks is replaced with the OAM block; wherein, the OAM block is identified by setting an identification header.
  • the second OAM information sending unit is configured to, when it is determined that the third preset period is reached, and the IDLE block is not included between the T block and the S block, the T block The OAM block is inserted between the S block and the S block.
  • the second OAM information sending unit is configured to delete some IDLE blocks in the PCS layer data.
  • the OAM channel is constructed at the FEC layer at both ends of the mobile fronthaul;
  • the first information sending module 31 includes: a third OAM information sending unit configured to process Ethernet data to obtain FEC layer data; according to the FEC The second alignment identifier of the layer data is inserted into the OAM block; the OAM block is sent to the receiving side device through the OAM channel.
  • the third OAM information sending unit is configured to process the FEC layer data to obtain PCS layer data when it is determined that the FEC layer data does not include the second alignment identifier;
  • the layer data is processed in accordance with a preset data processing method to obtain processed PCS layer data; wherein the preset data processing method includes code block synchronization and alignment locking; in the processed PCS layer according to a second preset period
  • the OAM block is inserted after the first alignment identifier in the data; wherein, in the case that the second preset period is a custom period, the OAM block is identified by setting an identifier header.
  • the third OAM information sending unit is configured to insert the OAM after the second alignment identifier according to a fourth preset period when it is determined that the FEC layer data includes the second alignment identifier. Block; wherein, the OAM block is identified by setting the identification header.
  • the third OAM information sending unit is configured to delete part of IDLE blocks in the PCS layer data when the PCS layer data corresponding to the FEC layer data is inserted into the second alignment identifier.
  • the device further includes: a first Ethernet frame receiving module configured to receive the first Ethernet frame sent by the receiving side device through the OAM channel; and a first OAM information acquiring module configured to analyze The first Ethernet frame obtains the first OAM information; the wavelength tuning module is configured to tune the second emission wavelength according to the first receiving wavelength included in the first OAM information; the second wavelength information adding module is configured to The second transmitting wavelength and the second receiving wavelength are added to the second OAM information; the second OAM information feedback module is configured to insert the second OAM information into the second Ethernet frame and feed it back to the all through the OAM channel ⁇ Receiving side equipment.
  • a first Ethernet frame receiving module configured to receive the first Ethernet frame sent by the receiving side device through the OAM channel
  • a first OAM information acquiring module configured to analyze The first Ethernet frame obtains the first OAM information
  • the wavelength tuning module is configured to tune the second emission wavelength according to the first receiving wavelength included in the first OAM information
  • the second wavelength information adding module is configured to The second transmitting wavelength and the second receiving wavelength are added to
  • the device further includes: an Ethernet frame receiving module, configured to receive the Ethernet frame sent by the receiving device through the OAM channel; and an OAM information acquiring module, configured to parse the Ethernet frame to obtain OAM information; a field identification module, configured to identify the link loopback switch field in the OAM information; a first loopback processing module, configured to determine that the field value corresponding to the link loopback switch field is the first value In the case of performing loopback processing; the second loopback processing module is configured to cancel the loopback processing when it is determined that the field value corresponding to the link loopback switch field is the second value.
  • the OAM information includes an OAM identification header, a performance field, an alarm field, a wavelength field, and a maintenance function field; wherein, the performance field includes input optical power, output optical power, laser bias current, and internal temperature of the module. , At least one of error code statistics and error packet statistics; the alarm field includes input no light warning indication, input low light warning indication, input strong light warning indication, output no light warning indication, output low light warning indication, output At least one of strong light alarm indication, excessive bias current alarm indication, module temperature over-limit alarm indication, local connection failure alarm indication, remote connection failure alarm indication, connection failure alarm indication, and synchronization loss alarm indication;
  • the wavelength field includes at least one of a module transmitting wavelength and a module receiving wavelength;
  • the maintenance function field includes at least one of a wavelength lock flag and a link loopback switch.
  • FIG. 23 is a schematic structural diagram of a signal receiving device provided by this application.
  • an OAM information transmission device for mobile fronthaul provided in an embodiment of the application is , Can be integrated on the receiving side device, the device includes: a first information receiving module 41 configured to receive OAM information sent by the sending side device through an OAM channel, so as to realize the OAM function for the sending side device; wherein, the The OAM channel is constructed at both ends of the mobile fronthaul.
  • the signal receiving device provided in this embodiment is used to implement the signal receiving method described in the embodiment of this application.
  • the implementation principle of the signal receiving device provided in this embodiment is similar to the signal receiving method described in the embodiment of this application, and will not be omitted here. Go into details.
  • the OAM channel is constructed on the MAC layer at both ends of the mobile fronthaul;
  • the first information receiving module 41 includes a first OAM information receiving unit configured to receive the original information sent by the sending-side device through the OAM channel Data; parse the original data to obtain MAC layer data; identify the MAC layer data according to a set identification code to obtain an OAM packet; extract field information in the OAM packet to obtain the device status of the sending-side device.
  • the OAM channel is constructed on the PCS layer at both ends of the mobile fronthaul;
  • the first information receiving module 41 includes a second OAM information receiving unit, configured to receive the original information sent by the sending-side device through the OAM channel Data; parse the original data to obtain PCS layer data; extract field information in the OAM information according to the PCS layer data to obtain the device status of the sending-side device.
  • the second OAM information receiving unit is configured to locate the OAM block according to the first alignment identifier in the PCS layer data; extract field information in the OAM block.
  • the second OAM information receiving unit is configured to identify an OAM block from the PCS layer data according to a set identification header; extract field information in the OAM block.
  • the OAM channel is constructed on the FEC layer at both ends of the mobile fronthaul;
  • the first information receiving module 41 includes a third OAM information receiving unit, configured to receive the original information sent by the sending-side device through the OAM channel Data; parsing the original data to obtain FEC layer data; extracting field information in the OAM information according to the FEC layer data to obtain the device status of the sending-side device.
  • the third OAM information receiving unit is configured to process the FEC layer data to obtain PCS layer data; locate the OAM block according to the first alignment identifier in the PCS layer data; extract the OAM block in the OAM block Field information.
  • the third OAM information receiving unit is configured to locate the OAM block according to the second alignment identifier in the FEC layer data; extract field information in the OAM block.
  • the device further includes: a wavelength configuration module configured to configure a first emission wavelength and a first reception wavelength; a first wavelength information addition module configured to configure the first emission wavelength and the first reception wavelength
  • the wavelength is added to the first OAM information
  • the first OAM information sending module is configured to add the first OAM information to the first Ethernet frame and send it to the sending side device through the OAM channel
  • the second Ethernet A frame receiving module configured to receive the second Ethernet frame fed back by the sending-side device through the OAM channel
  • a second OAM information acquiring module configured to parse the second Ethernet frame to acquire second OAM information
  • wavelength locking The identity update module is configured to use the first lock identity to update the wavelength lock identity when it is determined according to the second OAM information that the wavelength tuning of the transmitting side device is successful; otherwise, use the second lock identity to update the wavelength lock identity , And return to perform the operation of configuring the first emission wavelength and the first reception wavelength.
  • the apparatus further includes: a first fault determination module, configured to determine the fault when it is determined that the sending-side device performs loopback processing, and the receiving-side device transmits to the receiving-side device and the receiving link is unblocked. Originated from a wireless device; the second fault determination module is configured to determine that the fault originates from the wired device when it is determined that the sending-side device performs loopback processing, and the receiving-side device sends to the receiving-side device the receiving link is not clear.
  • a first fault determination module configured to determine the fault when it is determined that the sending-side device performs loopback processing, and the receiving-side device transmits to the receiving-side device and the receiving link is unblocked. Originated from a wireless device
  • the second fault determination module is configured to determine that the fault originates from the wired device when it is determined that the sending-side device performs loopback processing, and the receiving-side device sends to the receiving-side device the receiving link is not clear.
  • the second fault determination module is configured to transmit light to the optical multiplexing unit OMU and the optical demultiplexing unit ODU in the mobile fronthaul through an optical time domain reflectometer OTDR; after determining that the OTDR receives the OMU In the case of looped light, it is determined that the fault originates from the optical module device; in the case of determining that the OTDR does not receive the looped light of the OMU, it is determined that the fault originates from the optical line.
  • the OAM information includes an OAM identification header, a performance field, an alarm field, a wavelength field, and a maintenance function field; wherein, the performance field includes input optical power, output optical power, laser bias current, and internal temperature of the module. , At least one of error code statistics and error packet statistics; the alarm field includes input no light warning indication, input low light warning indication, input strong light warning indication, output no light warning indication, output low light warning indication, output At least one of strong light alarm indication, excessive bias current alarm indication, module temperature over-limit alarm indication, local connection failure alarm indication, remote connection failure alarm indication, connection failure alarm indication, and synchronization loss alarm indication;
  • the wavelength field includes at least one of a module transmitting wavelength and a module receiving wavelength;
  • the maintenance function field includes at least one of a wavelength lock flag and a link loopback switch.
  • FIG. 24 is a schematic structural diagram of a sending-side device provided in this application.
  • the sending-side device provided in this application includes: one or more processors 51 and a storage device 52; the processor 51 of the sending-side device may be one or more, and one processor 51 is taken as an example in FIG.
  • the storage device 52 is used to store one or more programs; the one or more The program is executed by the one or more processors 51, so that the one or more processors 51 implement the OAM information transmission method of mobile fronthaul as described in the embodiment of the present application: send OAM to the receiving side device through the OAM channel Information to realize the OAM function for the sending-side device; wherein, the OAM channel is constructed at both ends of the mobile fronthaul.
  • the processor 51 and the storage device 52 in the sending-side device may be connected through a bus or in other ways.
  • the connection through a bus is taken as an example.
  • the storage device 52 can be configured to store software programs, computer-executable programs, and modules, such as the program instructions/modules corresponding to the OAM information transmission method of the mobile fronthaul described in the embodiment of the present application (for example, mobile The first information sending module in the fronthaul OAM information transmission device 31).
  • the storage device 52 may include a storage program area and a storage data area.
  • the storage program area may store an operating system and an application program required by at least one function; the storage data area may store data created according to the use of the device, and the like.
  • the storage device 52 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the storage device 52 may further include memories remotely provided with respect to the processor 51, and these remote memories may be connected to the sending-side device through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.
  • FIG. 25 is a schematic structural diagram of a receiving-side device provided in this application.
  • the receiving-side device provided in this application includes: one or more processors 61 and a storage device 62; the processor 61 of the receiving device may be one or more, and one processor 61 is taken as an example in FIG.
  • the storage device 62 is used to store one or more programs; the one or more The program is executed by the one or more processors 61, so that the one or more processors 61 implement the OAM information transmission method for mobile fronthaul as described in the embodiments of the present application: receiving the information sent by the sending side device through the OAM channel The OAM information is used to implement the OAM function for the sending-side device; wherein, the OAM channel is constructed at both ends of the mobile fronthaul.
  • the processor 61 and the storage device 62 in the receiving-side device may be connected through a bus or in other ways.
  • the connection through a bus is taken as an example.
  • the storage device 62 can be configured to store software programs, computer-executable programs, and modules, such as the program instructions/modules corresponding to the OAM information transmission method of the mobile fronthaul described in the embodiment of the present application (for example, mobile The first information receiving module in the fronthaul OAM information transmission device 41).
  • the storage device 62 may include a storage program area and a storage data area.
  • the storage program area may store an operating system and an application program required by at least one function; the storage data area may store data created according to the use of the device, and the like.
  • the storage device 62 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the storage device 62 may further include memories remotely provided with respect to the processor 61, and these remote memories may be connected to the receiving-side device through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.
  • An embodiment of the present application also provides a storage medium that stores a computer program that, when executed by a processor, implements the OAM information transmission method for mobile fronthaul described in any of the embodiments of the present application.
  • the OAM information transmission method of the mobile fronthaul includes: sending OAM information to the receiving side device through the OAM channel to realize the OAM function for the transmitting side device; wherein the OAM channel is constructed at both ends of the mobile fronthaul.
  • the OAM information transmission method of mobile fronthaul further includes: receiving OAM information sent by the sending-side device through an OAM channel, so as to realize the OAM function for the sending-side device; wherein, the OAM channel is constructed at both ends of the mobile fronthaul.
  • terminal encompasses any suitable type of wireless user equipment, such as mobile phones, portable data processing devices, portable web browsers, or vehicle-mounted mobile stations.
  • the various embodiments of the present application can be implemented in hardware or dedicated circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device, although the present application is not limited thereto.
  • Computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or written in any combination of one or more programming languages Source code or object code.
  • ISA Instruction Set Architecture
  • the block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions.
  • the computer program can be stored on the memory.
  • the memory can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as but not limited to read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), optical Memory devices and systems (Digital Video Disc (DVD) or Compact Disk (CD)), etc.
  • Computer-readable media may include non-transitory storage media.
  • the data processor can be any type suitable for the local technical environment, such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (Digital Signal Processing, DSP), application specific integrated circuits (ASICs) ), programmable logic devices (Field-Programmable Gate Array, FPGA), and processors based on multi-core processor architecture.
  • DSP Digital Signal Processing
  • ASICs application specific integrated circuits
  • FPGA Field-Programmable Gate Array
  • FPGA Field-Programmable Gate Array

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé, un appareil, un dispositif et un support pour la transmission d'informations OAM de fronthaul mobile. Le procédé de transmission d'informations OAM de fronthaul mobile comprend l'envoi d'informations OAM à un dispositif côté réception au moyen d'un canal OAM pour implémenter la fonction OAM d'un dispositif côté envoi, le canal OAM étant construit entre un dispositif côté réception de fronthaul mobile et un dispositif côté envoi.
PCT/CN2020/114947 2019-09-12 2020-09-14 Procédé, appareil, dispositif et support pour la transmission d'informations oam de fronthaul mobile WO2021047663A1 (fr)

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