WO2018227624A1 - Procédé, dispositif et système de traitement de paquets de données - Google Patents

Procédé, dispositif et système de traitement de paquets de données Download PDF

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Publication number
WO2018227624A1
WO2018227624A1 PCT/CN2017/088794 CN2017088794W WO2018227624A1 WO 2018227624 A1 WO2018227624 A1 WO 2018227624A1 CN 2017088794 W CN2017088794 W CN 2017088794W WO 2018227624 A1 WO2018227624 A1 WO 2018227624A1
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WIPO (PCT)
Prior art keywords
onu
logical link
link identifier
broadcast logical
bandwidth capacity
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PCT/CN2017/088794
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English (en)
Chinese (zh)
Inventor
高波
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华为技术有限公司
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Priority to PCT/CN2017/088794 priority Critical patent/WO2018227624A1/fr
Publication of WO2018227624A1 publication Critical patent/WO2018227624A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/08—Time-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast

Definitions

  • the present invention relates to the field of optical communication technologies, and in particular, to a method, an apparatus, and a system for processing a data packet.
  • the EPON 100 can include at least one optical line terminal (OLT) 110, an optical distribution network (ODN) 130, and multiple optical network units (Optical Network Units).
  • OLT optical line terminal
  • ODN optical distribution network
  • ONU optical network units
  • the Institute of Electrical and Electronics Engineers (IEEE) standard defines only 1G-EP0N and 10G-EPON standards.
  • IEEE802.3-2005 Section 5 standard defines a 1G-EPON broadcast logical link.
  • the identifier is 0x7fff;
  • the IEEE802.3av standard defines the broadcast logical link identifier of the 10G-EPON as 0x7FFE.
  • the OLT uses the broadcast logical link identifier to send the data packet to the ONU connected to the OLT. Then, the ONU determines which port to forward the data packet according to the locally saved user interface.
  • the above is mainly for the case where only one ONU of the same type is connected to one port under the OLT.
  • the next-generation EPON system there are different ports under one OLT.
  • the different types of ONUs here mainly refer to different downlink bandwidth capacities of the ONUs, for example, the OLT passes four.
  • the port is connected to an ONU of 25Gb/s, an ONU of 50Gb/s or an ONU of 100Gb/s
  • how the OLT uses the broadcast logical channel to send data packets to different types of ONUs is not relevant in the existing standards. Therefore, in the next-generation EPON system, how to efficiently implement the forwarding of broadcast services by the OLT is a problem to be solved in the next generation of EPON.
  • the embodiment of the invention provides a data packet processing method and related device and system, which are used to solve the configuration and management of different types of ONUs by the OLT in the next generation PON system.
  • a first design provides a method for processing a data packet, the method comprising: the optical line terminal OLT determining, according to a downlink bandwidth capacity of the ONU of the optical network unit, a broadcast corresponding to a downlink bandwidth capacity of the ONU. a logical link identifier; generating a data packet, the data packet including: the determined broadcast logical link identifier; the OLT transmitting the data packet to a wavelength channel corresponding to a downlink bandwidth capacity of the ONU
  • the downlink bandwidth capacity of the ONU is at least: any one of 25 Gb/s, 50 Gb/s, or 100 Gb/s; and the determined broadcast logical link identifier is at least: a first broadcast corresponding to 25 Gb/s
  • the OLT determines, according to the downlink bandwidth capacity of the ONU, a broadcast logical link identifier corresponding to the downlink bandwidth capacity of the ONU; and generates a data packet, where the data packet includes: the determined broadcast logical link identifier
  • the OLT sends the data packet to a wavelength channel corresponding to the downlink bandwidth capacity of the ONU, and implements flexible management and configuration of different types of ONUs in the next generation PON, and the ONU is generally in the protocol.
  • the MPRS layer of the layer implements the filtering of the data packet by broadcasting the logical link identifier, and reduces the processing burden of the upper protocol layer caused by forwarding a large number of data packets to the MPRS layer, for example, the multi-point control protocol MPCP layer, and reduces the processing burden.
  • the processing delay of the data packet is not limited to, the MPRS layer, the multi-point control protocol MPCP layer.
  • the OLT allocates a first broadcast logical link identifier to 25 Gb/s;
  • the OLT allocates a second broadcast logical link identifier to 50 Gb/s;
  • the OLT allocates a third broadcast logical link identifier for 100 Gb/s.
  • another possible implementation is: the value of the first broadcast logical link identifier, the value of the second broadcast logical link identifier, and the third broadcast.
  • the value of the logical link identifier is different.
  • the OLT determines a wavelength channel corresponding to a downlink bandwidth capacity of the ONU according to a downlink bandwidth capacity of the ONU.
  • each wavelength channel carries a different operating wavelength.
  • the broadcast logical link identifier includes at least one of: a broadcast physical link identifier PLID or a broadcast user link identifier ULID.
  • the OLT generates a data packet including the broadcast logical link identifier, so that the ONU performs filtering according to the data packet identified by the broadcast logical link, and implements management and configuration of the OLT for different types of ONUs in the next generation PON.
  • the second design provides a method for processing a data packet, the method comprising:
  • the optical network unit ONU receives the data packet sent by the optical line terminal OLT, and the data packet includes: a broadcast logical link identifier; the ONU identifies the ONU downlink corresponding to the broadcast logical link identifier according to the broadcast logical link identifier a bandwidth capacity; when the downlink bandwidth capacity of the ONU itself is the same as the identified downlink bandwidth capacity of the ONU, receiving the data packet;
  • the downlink bandwidth capacity of the ONU is at least: any one of 25 Gb/s, 50 Gb/s, or 100 Gb/s; and the broadcast logical link identifier is at least: a first broadcast logical link corresponding to 25 Gb/s.
  • the identifier is a second broadcast logical link identifier corresponding to 50 Gb/s, and any one of the third broadcast logical link identifiers corresponding to 100 Gb/s.
  • the ONU receives the data packet including the broadcast logical link identifier, and the ONU receives the data packet sent to the ONU according to the logical link identifier, thereby implementing filtering on the data packet, and implementing the next generation PON.
  • the OLT manages and configures different types of ONUs flexibly, and the ONU generally implements filtering of data packets by using the broadcast logical link identifier at the MPRS layer of the protocol layer, thereby reducing the forwarding of a large number of data packets to the MPRS layer.
  • the point control protocol MPCP layer performs the processing burden of the upper protocol layer caused by filtering, and reduces the processing delay of the data packet.
  • the ONU further includes: the ONU matches its downlink bandwidth capacity with the identified ONU downlink bandwidth capacity.
  • the data packet is discarded.
  • the value of the first broadcast logical link identifier, the value of the second broadcast logical link identifier, and the value of the third broadcast logical link identifier are different according to various possible implementations of the foregoing design.
  • the above-mentioned broadcast logical link identifier may include a broadcast PLID, and the PLID value range may be different according to the ONU downlink bandwidth capacity, and specifically for 25Gb/s, 50Gb/s and 100Gb/s types, the value of the PLID may include : 0xFFFD, 0xFFFE, 0xFFFF; or 0x7FFB, 0x7FFC and 0x7FFD or 0x1, 0x2, 0x3.
  • the ONU receives the data packet including the broadcast logical link identifier, and the ONU receives the data packet sent to the ONU according to the logical link identifier, thereby implementing filtering on the data packet, and implementing the next generation PON.
  • the OLT manages and configures different types of ONUs flexibly, and the ONU generally implements filtering of data packets by using the broadcast logical link identifier at the MPRS layer of the protocol layer, thereby reducing the forwarding of a large number of data packets to the MPRS layer.
  • the point control protocol MPCP layer performs the processing burden of the upper protocol layer caused by filtering, and reduces the processing delay of the data packet.
  • a third design provides an optical line termination OLT, and the OLT includes:
  • a processor configured to determine, according to a downlink bandwidth capacity of the ONU of the optical network unit, a broadcast logical link identifier corresponding to a downlink bandwidth capacity of the ONU, to generate a data packet, where the data packet includes: the determined broadcast logical link
  • the identifier of the ONU has a downlink bandwidth capacity of at least: 25 Gb/s, 50 Gb/s, or 100 Gb/s; and the determined broadcast logical link identifier is at least: 25 Gb/s corresponding to the first The broadcast logical link identifier, the second broadcast logical link identifier corresponding to 50 Gb/s, and the third broadcast logical link identifier corresponding to 100 Gb/s;
  • a transceiver configured to send the data packet to a wavelength channel corresponding to a downlink bandwidth capacity of the ONU.
  • the OLT generates a data packet including the broadcast logical link identifier, so that the ONU performs filtering according to the data packet identified by the broadcast logical link, and implements management and configuration of the OLT for different types of ONUs in the next generation PON.
  • the processor is further configured to allocate, by the OLT, a first broadcast logical link identifier for 25 Gb/s; and allocate a second broadcast logical link identifier for 50 Gb/s. ; Assign a third broadcast logical link identifier to 100Gb/s.
  • another possible implementation is: the value of the first broadcast logical link identifier, the value of the second broadcast logical link identifier, and the third broadcast.
  • the value of the logical link identifier is different.
  • the processor is further configured to determine, by the OLT, a wavelength channel corresponding to a downlink bandwidth capacity of the ONU according to a downlink bandwidth capacity of the ONU.
  • each wavelength channel carries a different operating wavelength.
  • the broadcast logical link identifier includes at least one of: a broadcast physical link identifier PLID or a broadcast user link identifier ULID.
  • the generated data packet with the broadcast logical link identifier is sent to the ONU by the OLT, so that the ONU identifies the data packet by using the broadcast logical link identifier in the data packet, thereby implementing the next generation PON.
  • flexible management and configuration of different types of ONUs, and ONUs generally pass through the MPRS layer of the protocol layer.
  • the broadcast logical link identifier implements the filtering of the data packet, and reduces the processing burden of the upper protocol layer caused by forwarding a large number of data packets to the MPRS layer, for example, the multi-point control protocol MPCP layer, and reduces the processing of the data packet. Delay.
  • a fourth design provides an optical network unit ONU, where the optical network unit includes:
  • a transceiver configured to receive a data packet sent by an optical line terminal OLT, where the data packet includes: a broadcast logical link identifier; and receiving the data packet according to an indication of the processor;
  • a processor configured to identify, according to the broadcast logical link identifier, an ONU downlink bandwidth capacity corresponding to the broadcast logical link identifier; when the downlink bandwidth capacity of the ONU itself is the same as the identified ONU downlink bandwidth capacity, Instructing the transceiver to receive the data packet; wherein the downlink bandwidth capacity of the ONU is at least: any one of 25 Gb/s, 50 Gb/s, or 100 Gb/s; the broadcast logical link identifier is at least The first broadcast logical link identifier corresponding to 25 Gb/s, the second broadcast logical link identifier corresponding to 50 Gb/s, and the third broadcast logical link identifier corresponding to 100 Gb/s.
  • the ONU receives the data packet including the broadcast logical link identifier, and the ONU receives the data packet sent to the ONU according to the logical link identifier, thereby implementing filtering on the data packet, and implementing the next generation PON.
  • the OLT manages and configures different types of ONUs flexibly, and the ONU generally implements filtering of data packets by using the broadcast logical link identifier at the MPRS layer of the protocol layer, thereby reducing the forwarding of a large number of data packets to the MPRS layer.
  • the point control protocol MPCP layer performs the processing burden of the upper protocol layer caused by filtering, and reduces the processing delay of the data packet.
  • a possible implementation manner further includes: the processor is further configured to match its downlink bandwidth capacity with the identified ONU downlink bandwidth capacity.
  • the processor is further configured to discard the data when the downlink bandwidth capacity of the ONU itself is different from the identified downlink bandwidth capacity of the ONU. package.
  • the value of the first broadcast logical link identifier, the value of the second broadcast logical link identifier, and the value of the third broadcast logical link identifier are different according to various possible implementations of the foregoing design.
  • the above-mentioned broadcast logical link identifier may include a broadcast PLID, and the PLID value range is different according to the downlink bandwidth capacity of the ONU, and specifically for the types of 25 Gb/s, 50 Gb/s, and 100 Gb/s, the value of the PLID may be Including: 0xFFFD, 0xFFFE, 0xFFFF; or 0x7FFB, 0x7FFC and 0x7FFD or 0x1, 0x2, 0x3.
  • the ONU filters the data packet by using the broadcast logical link identifier in the data packet.
  • This filtering is generally implemented in the MPRS layer of the protocol layer, which reduces the forwarding of a large number of data packets to the MPRS layer.
  • the point control protocol MPCP layer performs the processing burden of the upper protocol layer caused by filtering, and reduces the processing delay of the data packet.
  • a fifth design provides a passive optical network PON, where the PON includes: an optical line terminal OLT and an optical network unit ONU, and the OLT includes any one of the OLTs as described in the third design.
  • the ONU includes any one of the ONUs as described in the fourth design.
  • the generated data packet with the broadcast logical link identifier is sent to the ONU through the OLT, so that the ONU identifies the data packet by using the broadcast logical link identifier in the data packet, which not only realizes In the next-generation PON, the OLT has flexible management and configuration of different types of ONUs, and the ONU generally implements filtering of data packets through the broadcast logical link identifier at the MPRS layer of the protocol layer, and reduces the forwarding of a large number of data packets to the MPRS layer. It For example, the processing power of the upper layer protocol layer caused by filtering by the MPCP layer of the multipoint control protocol is reduced, and the processing delay of the data packet is reduced.
  • FIG. 1 is a schematic diagram of a network architecture of a PON system provided by the prior art
  • FIG. 2 is a schematic diagram of a network architecture of a next-generation EPON system according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a method for processing a data packet according to an embodiment of the present invention.
  • 4a is a schematic diagram of data packet forwarding of a 25G ONU according to an embodiment of the present invention.
  • 4b is a schematic diagram of data packet forwarding of a 50G ONU according to an embodiment of the present invention.
  • 4c is a schematic diagram of data packet forwarding of a 100G ONU according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of another method for processing a data packet according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of an optical line terminal according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of an optical network unit according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a network of another PON system according to an embodiment of the present invention.
  • the embodiment of the invention provides a data packet processing method and related device and system, which are used to solve the configuration and management of different types of ONUs in the next generation PON system, and greatly improve the reliability of the system.
  • the next-generation EPON system 100 includes an OLT 110, a plurality of ONUs 120, and an Optical Distribution Network (ODN) 130.
  • ODN Optical Distribution Network
  • the OLT 110 includes a data distributor and various downstream ports.
  • the data distributor is a demultiplexer DeMultiplexing, which is given as four downlink ports in the example of the downlink port diagram, given here as an example, at least two downlink ports are provided.
  • An electrical signal is generated between the DeMultiplexing and the port, and the DeMultiplexing and the downlink port are both disposed on a board of the OLT, and each of the downlink ports can convert an electrical signal into an optical signal, and output through the port, such as As shown in FIG. 2, the four downlink ports of the OLT and the multiplexer WDM are connected by four branch fibers, and optical signals are transmitted in each branch fiber.
  • the wavelengths of the optical signals transmitted in the branch fibers are different. It should be noted here that if the WDM is set in the OLT, the OLT Each of the downstream ports is connected to the WDM through a waveguide.
  • the WDM and the beam splitter 130 are connected by a trunk fiber, and the beam splitter 130 is connected to the WDM of the terminal side through a branch fiber.
  • the WDM is connected to the packet reassembler through each uplink port of the terminal side device ONU, and the packet reassembler is a multiplexer or a multiplexer in the example of FIG. 2, including but not limited to the multiplexer or the multiplexer. Waves.
  • the WDM on the terminal side and the uplink ports on the ONU 120 transmit optical signals through the branch fibers.
  • the WDM and the ONU 120 are connected by a waveguide for transmitting an optical signal.
  • Each of the uplink ports on the ONU 120 converts the optical signal into an electrical signal, and transmits the data to Multiplxing for packet reassembly.
  • An electrical signal is transmitted between the respective uplink ports and the Multiplxing.
  • the ONU sends the reassembled service flow to the user through each downlink port (not shown in FIG. 2).
  • each data packet can be split into a plurality of fixed-length data slices, which are converted into optical signals through ports, and transmitted in respective wavelength channels.
  • the WDM combines the optical signals of the respective wavelength channels, transmits them to the WDM of each terminal side through the optical splitter 130, and demultiplexes them to the respective wavelength channels ⁇ 0- ⁇ 4 of the respective ONUs 120 by the WDM of the terminal side, and passes through the respective wavelengths.
  • the channel transmits the optical signal, receives the optical signal through the port, recovers the data fragmentation, and finally performs data fragmentation and reassembly through Multiplexing, and sends the reassembled data packet to the user.
  • the above-mentioned channel can be understood as a wavelength channel or other channel.
  • the wavelength channel can be a logical channel or a physical channel, or can be understood as a fiber link.
  • This application can be understood as a physical channel.
  • the channel can be understood as a physical channel from each downlink port of the OLT to each uplink port of the ONU.
  • the network architecture of the above-mentioned next-generation EPON is an example of a 100GEPON architecture, that is, data transmission is performed between the OLT and the ONU through four wavelength channels, and each channel carries a data stream of 25 Gbit/s, and a total of 100 Gbit/s can be transmitted.
  • the data packet transmitted between the OLT and the ONU may include: a control packet from the control plane and a data packet of the data plane.
  • the above describes the system architecture by taking 100G EPON as an example.
  • the above system is not limited to 100G EPON, 50G EPON and 25G EPON can be applied.
  • a method for processing a data packet suitable for the network architecture is provided, as shown in FIG. 3. It is applied to the OLT in the above passive optical network system, specifically the protocol layering of the OLT in the PON system, especially the multi-point reconciliation sublayer (MPRS) in the protocol layer of the NG EPON, such as 100G EPON.
  • MPRS multi-point reconciliation sublayer
  • the OLT determines, according to the downlink bandwidth capacity of the ONU of the optical network unit, a broadcast logical link identifier corresponding to the downlink bandwidth capacity of the ONU.
  • the downlink bandwidth capacity of the ONU is at least: any one of 25 Gb/s, 50 Gb/s, or 100 Gb/s; and the determined broadcast logical link identifier is at least: a first broadcast logic corresponding to 25 Gb/s.
  • a multi-point control protocol (MPCP)
  • MAC media access control
  • MPRS multi-point harmonic Layer protocol layer
  • the MPCP defines a control mechanism of the point-to-multipoint optical network, generates an MPCP message, which is used for management control information of the ONU, and forwards to the MAC protocol layer; and at the MAC protocol layer, the OLT generates the MPCP generated by the MPCP protocol layer.
  • the OLT determines a broadcast logical link identifier corresponding to the downlink bandwidth capacity of the ONU according to the downlink bandwidth capacity of the ONU, and will broadcast the logic to the data packet.
  • the link identifier is placed in the preamble to generate a packet with the broadcast logical link identifier.
  • the downlink bandwidth capacity of the ONU can be understood as the maximum data traffic supported by the ONU port when the data packet is sent from the OLT to the ONU.
  • the ONU supports multiple ports, each port has a rate of 25 Gbps, and the wavelength channel corresponding to each port can carry 25 Gb/s data traffic. If the ONU supports two ports, the maximum data traffic supported by the ONU is 25*2, which is 50Gb/s. If the ONU supports four ports, the maximum data traffic supported by the ONU is 25*4, that is, 100 Gb/s, where multiple data packets constitute one data stream.
  • the method further includes:
  • the OLT allocates different broadcast logical link identifiers according to different downlink bandwidth capacities of the ONUs:
  • the OLT allocates a first broadcast logical link identifier to 25 Gb/s;
  • the OLT allocates a second broadcast logical link identifier to 50 Gb/s;
  • the OLT allocates a third broadcast logical link identifier for 100 Gb/s. Further, the value of the first broadcast logical link identifier, the value of the second broadcast logical link identifier, and the value of the third broadcast logical link identifier are different.
  • the 100G EPON standard includes a logical link identifier (LLID) including at least one of the following: a physical link identifier (PLID), and a broadcast user link identifier ( User Link Identifier (ULID) or Group Link Identifer (GLID), where the broadcast PLID is used to identify the transmitted management control packet, including the MPCP message and the management maintenance control OAM packet, and the broadcast ULID is used to identify User business package.
  • the broadcast group link identifier GLID is a packet ID containing a plurality of LLIDs for identifying a transmission slot included in the uplink burst grant.
  • the OLT defines a corresponding broadcast logical link identifier for the downlink bandwidth capacity of the different ONUs.
  • the value of the broadcast logical link identifier is [0x0000, 0xFFFF].
  • Table 1 Value table of broadcast LLID
  • the broadcast logical link identifier includes a broadcast PLID and a broadcast ULID as an example, and the ONBs of the three different downlink bandwidth capacities of 25 Gb/s, 50 Gb/s, and 100 Gb/s are respectively allocated corresponding broadcast PLIDs and broadcast ULIDs.
  • the value of the broadcast LLID includes 0x7FFB, 0x7FFC, and 0x7FFD. The value of the broadcast LLID is different according to the downlink bandwidth capacity of the ONU.
  • the value of the broadcast LLID is 0x7FFB, which is used to indicate the downlink direction, that is, the direction in which the OLT sends data to the ONU, and uses the value of the broadcast LLID to perform Single Copy Broadcast (SCB) on the 25Gb/s ONU.
  • the value of the broadcast LLID is 0x7FFC, which is used to indicate that the value of the broadcast LLID is used to perform SCB on the 50Gb/s ONU.
  • the value of the broadcast LLID is 0x7FFD, which is used to indicate that the value of the broadcast is used to the ONU of 100Gb/s. Perform the downlink SCB.
  • the above values can also be freely allocated and defined.
  • the value of the broadcast LLID is 0x7FFB, which is used to indicate that the downlink SCB is performed for the 100Gb/s ONU; the value of the broadcast LLID is 0x7FFC, which is used to indicate 50Gb.
  • the /s ONU performs the downlink SCB; the broadcast LLID takes the value 0x7FFD, which is used to indicate that the 25Gb/s ONU performs the downlink SCB.
  • the value of the broadcast LLID may further include 0xFFFD, 0xFFFE, 0xFFFF, and the value of the broadcast LLID is different according to the downlink bandwidth capacity of the ONU, and the value thereof is also different.
  • the value of the broadcast LLID is 0xFFFD, which is used to indicate the downlink SCB of the 25Gb/s ONU;
  • the value of the broadcast LLID is 0xFFFE, which is used to indicate the downlink SCB of the 50Gb/s ONU;
  • the value of the broadcast LLID is 0xFFFF, which is used for Indicates the downlink SCB of 100Gb/s ONU.
  • the value of the above-mentioned value can also be freely allocated and defined.
  • the value of the broadcast LLID is 0xFFFD, which is used to indicate the downlink SCB of the 100Gb/s ONU
  • the value of the broadcast LLID is 0xFFFE, which is used to indicate the downlink SCB of the 50Gb/s ONU.
  • the broadcast LLID has a value of 0xFFFF and is used to indicate the downlink SCB of the 25Gb/s ONU.
  • the value of the broadcast LLID may further include 0x1, 0x2, and 0x3, and the value of the broadcast LLID is different according to the downlink bandwidth capacity of the ONU.
  • the value of the broadcast LLID is 0x1, which is used to indicate the downlink SCB of the 25Gb/s ONU;
  • the value of the broadcast LLID is 0x2, which is used to indicate the downlink SCB of the 50Gb/s ONU;
  • the value of the broadcast LLID is 0x3, which is used for Indicates the downlink SCB of 100Gb/s ONU.
  • the value of the above-mentioned value can also be freely allocated and defined.
  • the value of the broadcast LLID is 0x1, which is used to indicate the downlink SCB of the 100Gb/s ONU, and the value of the broadcast LLID is 0x2, which is used to indicate the downlink SCB of the 50Gb/s ONU.
  • the broadcast LLID has a value of 0x3 and is used to indicate the downlink SCB of the 25Gb/s ONU.
  • the broadcast LLID includes a broadcast PLID or a broadcast ULID, and the value of the broadcast PLID or the broadcast ULID may be taken from a value range of the broadcast LLLD, but may not be the same.
  • the value of the broadcast ULID includes 0x7FFB, 0x7FFC, and 0x7FFD
  • the value of the broadcast ULID includes: 0xFFFD, 0xFFFE, 0xFFFF; or
  • the value of the broadcast ULID includes: 0x1, 0x2, 0x3.
  • the OLT generates a data packet, where the data packet includes: the determined broadcast LLID.
  • the OLT further determines, according to the downlink bandwidth capacity of the ONU, a wavelength channel corresponding to the downlink bandwidth capacity of the ONU.
  • the OLT determines the wavelength channel corresponding to the ONU according to the downlink bandwidth capacity of the ONU, and sends the data packet on the determined wavelength channel, and the working wavelength corresponding to each wavelength channel is different.
  • 25Gb/s The ONU performs data packet transmission with the OLT through the wavelength channel CH0; as shown in FIG. 4b, the 50Gb/s ONU transmits data packets through the wavelength channels CH0 and CH1 and the OLT; as shown in FIG. 4c, the 100Gb/s ONU passes the wavelength channels CH0, CH1, CH2 and CH3 transmit data packets with the OLT.
  • the OLT when the OLT sends a data packet to the 50Gb/s ONU, the OLT can select to transmit data through at least one wavelength channel in CH0 and CH1; when the OLT sends the data packet to the 100Gb/s ONU, the OLT can select to pass the CH0- Data transmission is performed on at least one wavelength channel in CH3.
  • FIG. 4a is a schematic diagram of data packet transmission of a 25 Gb/s ONU.
  • the downlink bandwidth capacity of the ONU is 25 Gb/s
  • the OLT transmits the data packet through the wavelength channel CH0 according to the wavelength channel CH0 corresponding to the 25 Gb/s ONU.
  • the OLT determines that the wavelength channel corresponding to the 50Gb/s ONU is CH0 and CH1 according to the downlink bandwidth capacity of the ONU, and the OLT selects CH0 or CH1, or CH0 and CH1 for data packet transmission.
  • the OLT transmits the data packet through at least one wavelength channel of the wavelength channels CH0, CH1, CH2, and CH3 according to the downlink bandwidth capacity of the ONU.
  • the wavelength channels corresponding to the ONUs of different downlink bandwidths are the same.
  • the wavelength channel corresponding to the 25Gb/s ONU is CH0
  • the wavelength channels corresponding to the 50Gb/s ONU are CH0 and CH1.
  • the OLT sends a data packet to the 50Gb/s ONU
  • the data packet is transmitted through the wavelength channels CH0 and CH1 corresponding to the 50Gb/s ONU.
  • the 25Gb/s ONU and the 50Gb/s ONU and the 100Gb/s ONU correspond to the wavelength channel CH0
  • the 25Gb/s ONU, 50Gb/s ONU, and 100Gb/s ONU will receive the data packet, and the ONU that receives the data packet is identified according to the broadcast logical link in the data packet. Identify the data packets that belong to you.
  • the OLT sends the data packet to a wavelength channel corresponding to a downlink bandwidth capacity of the ONU.
  • An embodiment of the present invention provides a method for processing a data packet, by using an OLT to send a generated data packet with a broadcast logical link identifier to an ONU, so that the ONU identifies the data packet by using a broadcast logical link in the data packet.
  • Filtering not only realizes the flexible management and configuration of different types of ONUs in the next-generation PON, but also the ONU generally implements filtering of data packets through the broadcast logical link identifier in the MPRS layer of the protocol layer, reducing the large amount of data.
  • the packet is forwarded to the upper layer protocol layer caused by filtering on the MPRS layer, for example, the multi-point control protocol MPCP layer, and the processing delay of the data packet is reduced.
  • a method for processing a data packet is provided, as shown in FIG. 5, which is applied to the ONU of the passive optical network, and the processing method of the data packet includes:
  • the optical network unit ONU receives the data packet sent by the optical line terminal OLT, where the data packet includes: a broadcast logical link identifier.
  • the downlink bandwidth capacity of the ONU is at least: any one of 25 Gb/s, 50 Gb/s, or 100 Gb/s; and the broadcast logical link identifier is at least: a first broadcast logical link corresponding to 25 Gb/s.
  • the identifier is a second broadcast logical link identifier corresponding to 50 Gb/s, and any one of the third broadcast logical link identifiers corresponding to 100 Gb/s.
  • the value of the first broadcast logical link identifier, the value of the second broadcast logical link identifier, and the value of the third broadcast logical link identifier are different.
  • the ONU receives the data packet sent by the OLT through a wavelength channel corresponding to the ONU.
  • the broadcast logical link identifier has a value range of [0x0000, 0xFFFF].
  • the downlink bandwidth capacity of the ONU is different, and the value of the broadcast logical link identifier is different.
  • the broadcast logical link identifier includes a broadcast PLID and a broadcast ULID as an example, and the ONBs of the three different downlink bandwidth capacities of 25 Gb/s, 50 Gb/s, and 100 Gb/s are respectively allocated corresponding broadcast PLIDs and broadcast ULIDs.
  • the value of the broadcast LLID includes 0x7FFB, 0x7FFC, and 0x7FFD. The value of the broadcast LLID is different according to the downlink bandwidth capacity of the ONU.
  • the value of the broadcast LLID is 0x7FFB, which is used to indicate the downlink direction, that is, the direction in which the OLT sends data to the ONU, and uses the value of the broadcast LLID to perform Single Copy Broadcast (SCB) on the 25Gb/s ONU.
  • the value of the broadcast LLID is 0x7FFC, which is used to indicate that the value of the broadcast LLID is used to perform SCB on the 50Gb/s ONU.
  • the value of the broadcast LLID is 0x7FFD, which is used to indicate that the value of the broadcast is used to the ONU of 100Gb/s. Perform the downlink SCB.
  • the above values can also be freely allocated and defined.
  • the value of the broadcast LLID is 0x7FFB, which is used to indicate that the downlink SCB is performed for the 100Gb/s ONU; the value of the broadcast LLID is 0x7FFC, which is used to indicate 50Gb.
  • the /s ONU performs the downlink SCB; the broadcast LLID takes the value 0x7FFD, which is used to indicate that the 25Gb/s ONU performs the downlink SCB.
  • the value of the broadcast LLID may further include 0xFFFD, 0xFFFE, 0xFFFF, and the value of the broadcast LLID is different according to the downlink bandwidth capacity of the ONU, and the value thereof is also different. Please refer to the detailed description of Table 1 for details. It will not be repeated here.
  • the ONU identifies, according to the broadcast logical link identifier, an ONU downlink bandwidth capacity corresponding to the broadcast logical link identifier.
  • the method may further include S504:
  • step S504 The ONU matches its own downlink bandwidth capacity with the identified ONU downlink bandwidth capacity. If the ONU matches its own downlink bandwidth capacity with the identified ONU downlink bandwidth capacity, step S506 is performed. Otherwise, step S508 is performed. Wherein, step S508 is optional.
  • S506 Receive the data packet when the downlink bandwidth capacity of the ONU itself is the same as the identified downlink bandwidth capacity of the ONU.
  • the OLT determines that the value of the broadcast logical link identifier corresponding to the 50Gb/s ONU is 0x7FFC according to the 50Gb/s ONU, and generates a data packet, where the data packet includes the broadcast LLID.
  • the value is 0x7FFC.
  • the OLT determines that the wavelength channel corresponding to the 50 Gb/s ONU is CH0 and CH1, and the OLT may select CH0 or CH1 to send the generated data packet including the broadcast LLID.
  • the 25Gb/s ONU, 50Gb/s ONU, and 100Gb/s ONU will receive the data packet through CH0 according to the correspondence between the ONU downlink bandwidth capacity and the wavelength channel.
  • each of the ONUs respectively identifies the downlink bandwidth capacity of the ONU corresponding to the broadcast logical link identifier according to the broadcast logical link identifier.
  • the 25Gb/s ONU, the 50Gb/s ONU, and the 100Gb/s ONU recognize that the ONU corresponding to the 0x7FFC is 50 Gb/s according to the broadcast logical link identifier 0x7FFC in the data packet.
  • the 25Gb/s ONU and 100Gb/s ONUs perform their own downlink bandwidth capacity with the identified 50Gb/s. Matching, and discovering that the downlink bandwidth capacity of the ONU is not 50 Gb/s, discarding the data packet; the 50 Gb/s ONU matches its own downlink bandwidth capacity with the identified 50 Gb/s, and matches the ONU itself.
  • the downlink bandwidth capacity is the same as the identified 50 Gb/s, and the data packet is received. Therefore, in this way, the data packets that are not their own are filtered, which avoids forwarding a large number of data packets to the upper layer for filtering, thereby reducing the data transmission delay.
  • the embodiment of the present invention provides a method for processing a data packet.
  • the ONU identifies the downlink bandwidth capacity of the ONU corresponding to the broadcast logical link identifier by using the broadcast logical link identifier in the data packet, and filters the data packet, which is not only implemented.
  • the OLT has flexible management and configuration of different types of ONUs, and the ONU generally implements filtering of data packets through the broadcast logical link identifier at the MPRS layer of the protocol layer, and reduces the forwarding of a large number of data packets to the MPRS layer.
  • the MPCP layer of the multipoint control protocol performs the processing burden of the upper protocol layer caused by filtering, and reduces the processing delay of the data packet.
  • the OLT includes: a processor 600, configured to determine a downlink bandwidth capacity of the ONU according to a downlink bandwidth capacity of the optical network unit ONU. Corresponding broadcast logical link identifier, generating a data packet, where the data packet includes: the determined broadcast logical link identifier.
  • the downlink bandwidth capacity of the ONU is at least: any one of 25 Gb/s, 50 Gb/s, or 100 Gb/s; and the determined broadcast logical link identifier is at least: a first broadcast logic corresponding to 25 Gb/s.
  • the transceiver 602 is configured to send the generated data packet to a wavelength channel corresponding to a downlink bandwidth capacity of the ONU.
  • the processor is further configured to: the OLT allocates a first broadcast logical link identifier for 25 Gb/s; allocates a second broadcast logical link identifier for 50 Gb/s; and allocates a third broadcast logical link identifier for 100 Gb/s; .
  • the value of the first broadcast logical link identifier, the value of the second broadcast logical link identifier, and the value of the third broadcast logical link identifier are different.
  • the processor is further configured to determine, by the OLT, a wavelength channel corresponding to a downlink bandwidth capacity of the ONU according to a downlink bandwidth capacity of the ONU.
  • the broadcast logical link identifier includes at least one of: a broadcast physical link identifier PLID or a broadcast user link identifier ULID.
  • the broadcast logical link identifier has a value range of [0x0000, 0xFFFF].
  • An embodiment of the present invention provides an OLT, where the OLT sends a data packet including a broadcast logical link identifier to an ONU, so that the ONU identifies the ONU corresponding to the broadcast logical link identifier by using a broadcast logical link identifier in the data packet.
  • Downstream bandwidth capacity, filtering the data packet not only realizes flexible management and configuration of different types of ONUs in the next-generation PON, but also implements the data packet by the ONU in the MPRS layer of the protocol layer through the broadcast logical link identifier.
  • the filtering reduces the processing burden of the upper protocol layer caused by forwarding a large number of data packets onto the MPRS layer, for example, the multi-point control protocol MPCP layer, and reduces the processing delay of the data packet.
  • the specific structure of the optical network unit ONU in the system of FIG. 2 includes:
  • the transceiver 700 is configured to receive a data packet sent by the optical line terminal OLT, where the data packet includes: a broadcast logical link identifier; and receiving the data packet according to an instruction of the processor;
  • the processor 702 is configured to identify, according to the broadcast logical link identifier, an ONU downlink bandwidth capacity corresponding to the broadcast logical link identifier; when the ONU's own downlink bandwidth capacity is the same as the identified ONU downlink bandwidth capacity. And instructing the transceiver to receive the data packet.
  • the downlink bandwidth capacity of the ONU is at least: any one of 25 Gb/s, 50 Gb/s, or 100 Gb/s; and the broadcast logical link identifier is at least: a first broadcast logical link corresponding to 25 Gb/s.
  • the identifier is a second broadcast logical link identifier corresponding to 50 Gb/s, and any one of the third broadcast logical link identifiers corresponding to 100 Gb/s.
  • the value of the first broadcast logical link identifier, the value of the second broadcast logical link identifier, and the value of the third broadcast logical link identifier are different.
  • the processor is further configured to match its own downlink bandwidth capacity with the identified ONU downlink bandwidth capacity.
  • the processor is further configured to discard the data packet when the downlink bandwidth capacity of the ONU itself is different from the identified downlink bandwidth capacity of the ONU.
  • the broadcast logical link identifier has a value range of [0x0000, 0xFFFF].
  • the embodiment of the present invention provides an ONU, which receives a data packet, identifies the downlink bandwidth capacity of the ONU corresponding to the broadcast logical link identifier, and filters the data packet by using a broadcast logical link identifier in the data packet.
  • the ONU generally implements filtering of data packets through the broadcast logical link identifier at the MPRS layer of the protocol layer, and reduces the processing of the upper protocol layer caused by forwarding a large number of data packets to the MPRS layer, for example, the multi-point control protocol MPCP layer for filtering. The burden, while reducing the processing delay of the packet.
  • An embodiment of the present invention further provides a passive optical network system.
  • the OLT in the system is as shown in FIG. 2, Table 1, FIG. 3, and FIG. 4a to FIG. 4c.
  • FIG. 6 and the description of the corresponding embodiments of the drawings; the ONUs in the system are as shown in FIG. 2 and FIG. 5 and FIG. 5 corresponding to the method embodiments, and the device embodiments corresponding to FIG. 7 are not described here. No longer.
  • the embodiment of the invention further provides a communication device 80, which can be an OLT.
  • the communication device 80 includes a processor 802, a memory 804, and a bus system 806, the processor and the memory being connected by the bus system, the memory for storing instructions, the processing And instructions for executing the memory storage,
  • the processor is configured to: determine, according to a downlink bandwidth capacity of the ONU of the optical network unit, a broadcast logical link identifier corresponding to a downlink bandwidth capacity of the ONU, and generate a data packet, where the data packet includes: the determining The broadcast logical link identifier; wherein the downlink bandwidth capacity of the ONU is at least: any one of 25 Gb/s, 50 Gb/s, or 100 Gb/s; and the determined broadcast logical link identifier is at least: 25 Gb/ The first broadcast logical link identifier corresponding to s, the second broadcast logical link identifier corresponding to 50 Gb/s, and the third broadcast logical link identifier corresponding to 100 Gb/s.
  • the communication device may further include a transceiver (not shown) for transmitting the generated data packet to a wavelength channel corresponding to a downlink bandwidth capacity of the ONU.
  • the processor is further configured to: the OLT allocates a first broadcast logical link identifier for 25 Gb/s; allocates a second broadcast logical link identifier for 50 Gb/s; and allocates a third broadcast logical link identifier for 100 Gb/s; And, the processor also uses The OLT determines a wavelength channel corresponding to the downlink bandwidth capacity of the ONU according to the downlink bandwidth capacity of the ONU.
  • the value of the first broadcast logical link identifier, the value of the second broadcast logical link identifier, and the value of the third broadcast logical link identifier are different.
  • the embodiment of the invention further provides a communication device, which can be an ONU.
  • the downlink bandwidth capacity of the ONU is at least: any one of 25 Gb/s, 50 Gb/s, or 100 Gb/s; and the broadcast logical link identifier is at least: a first broadcast logical link corresponding to 25 Gb/s.
  • the identifier is a second broadcast logical link identifier corresponding to 50 Gb/s, and any one of the third broadcast logical link identifiers corresponding to 100 Gb/s.
  • the communication device may further include a transceiver (not shown) for receiving a data packet sent by the optical line terminal OLT, the data packet including: a broadcast logical link identifier; An indication of the processor to receive the data packet.
  • a transceiver for receiving a data packet sent by the optical line terminal OLT, the data packet including: a broadcast logical link identifier; An indication of the processor to receive the data packet.
  • Embodiments of the present invention provide a communication apparatus, which solves the problem of management and configuration of different types of ONUs in a next-generation PON system, and at the same time implements filtering of data packets, and reduces forwarding of a large number of data packets to the MPRS layer, for example.
  • the multi-point control protocol MPCP layer performs the processing burden of the upper protocol layer caused by filtering, and reduces the processing delay of the data packet.
  • the disclosed apparatus may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the above units is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined or integrated. Go to another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.
  • the units described above as separate components may or may not be physically separated.
  • the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the above integrated unit can be implemented in the form of a software functional unit and sold or used as a stand-alone product.
  • Stored in a computer readable storage medium a computer readable storage medium.
  • the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, server or network device, etc., and in particular a processor in a computer device) to perform all or part of the steps of the above-described methods of various embodiments of the present invention.
  • the foregoing storage medium may include: a U disk, a mobile hard disk, a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), and the like. The medium of the code.

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Abstract

La présente invention concerne un procédé, un dispositif et un système de traitement de paquets de données. Le procédé comprend les étapes suivantes : un OLT détermine, en fonction de la capacité de bande passante de liaison descendante d'une unité de réseau optique (ONU), une identité de liaison logique de diffusion correspondant à la capacité de bande passante de liaison descendante de l'ONU ; génère un paquet de données, le paquet de données comprenant l'identité de liaison logique de diffusion déterminée ; l'OLT envoie le paquet de données à un canal de longueur d'onde correspondant à la capacité de bande passante de liaison descendante de l'ONU, la capacité de bande passante de liaison descendante de l'ONU étant au moins l'une quelconque parmi : 25 Gb/s, 50 Gb/s, ou 100 Gb/s. Ainsi, l'invention permet de gérer et de configurer de manière flexible différents types d'ONU dans un PON de prochaine génération. De plus, une ONU filtre généralement des paquets de données au niveau d'une couche MPRS d'une couche de protocole au moyen de l'identité de liaison logique de diffusion, réduisant la charge de traitement d'une couche de protocole de couche supérieure provoquée par l'acheminement d'un grand nombre de paquets de données vers une couche MPRS telle qu'une couche de protocole de commande multipoint (MPCP) pour un filtrage, tout en réduisant le retard de traitement de paquets de données.
PCT/CN2017/088794 2017-06-16 2017-06-16 Procédé, dispositif et système de traitement de paquets de données WO2018227624A1 (fr)

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