WO2020063991A1 - Réseau pon, procédé et appareil pour réseau pon et système robotisé - Google Patents

Réseau pon, procédé et appareil pour réseau pon et système robotisé Download PDF

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Publication number
WO2020063991A1
WO2020063991A1 PCT/CN2019/109246 CN2019109246W WO2020063991A1 WO 2020063991 A1 WO2020063991 A1 WO 2020063991A1 CN 2019109246 W CN2019109246 W CN 2019109246W WO 2020063991 A1 WO2020063991 A1 WO 2020063991A1
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Prior art keywords
onu
olt
state machine
event
message
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PCT/CN2019/109246
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English (en)
Chinese (zh)
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黄晓庆
李晖
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深圳前海达闼云端智能科技有限公司
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Publication of WO2020063991A1 publication Critical patent/WO2020063991A1/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
    • 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
    • H04B10/27—Arrangements for networking
    • H04B10/272—Star-type networks or tree-type networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the present disclosure relates to the field of communications, and in particular, to a PON network, a method and device for the PON network, and a robot system.
  • CAN Controller Area Network. There is no master-slave data communication in CAN bus. Any node can initiate data communication to any other node, and the CAN bus will not be damaged by a single node. And paralyzed.
  • An object of the present disclosure is to provide a PON network, a method and device for the PON network, and a robot system capable of managing and controlling communication processes between nodes in the PON network, and improving communication in the PON network. Flexibility in communication between nodes.
  • a first aspect of the embodiments of the present disclosure provides a PON network, where the PON network includes an optical line terminal OLT, and at least one optical network unit ONU connected to the OLT;
  • the OLT as a master device for network management and control includes:
  • a first state machine module configured to run a master state machine that performs a state operation according to an event occurring on the OLT itself, and a slave state machine that performs a state operation according to an event occurring on an ONU connected to the OLT;
  • a first message bus layer module configured to provide a message bus server and a first message bus client to support a user of the first message bus client in the OLT and a user of a second message bus client in the ONU Register and subscribe to message topics and publish and receive topic messages;
  • the ONU as a network management control slave device includes:
  • a second state machine module configured to run a slave state machine that performs state operations according to an event occurring on the ONU itself and according to an event of the slave state machine running in the first state machine module;
  • a second message bus layer module configured to provide the second message bus client to support users of the second message bus client in the ONU to register and subscribe to message topics, and to publish and receive topic messages;
  • a second transmission network for message transmission between the ONU and the OLT
  • the first transmission network and the second transmission network include a time division and wavelength division multiplexed TWDM network, so that the ONU can switch access between different wavelength channels provided by the OLT.
  • a second aspect of the embodiments of the present disclosure provides a method for a PON network.
  • the method is applied to the PON network according to any one of the first aspects, and the method includes:
  • the first state machine module of the OLT registers a first message subject with a message bus server of the first message bus layer module, and sends a network management control NMC configuration instruction to an ONU connected to the OLT;
  • the second state machine module of the ONU performs NMC service configuration on the second transmission network of the ONU according to the NMC configuration instruction, and performs a second process on the message bus server through the second message bus layer module of the ONU.
  • the ONU switches access between different wavelength channels provided by the OLT.
  • a third aspect of the embodiments of the present disclosure provides an apparatus for a PON network, the apparatus being configured as an OLT in the PON network according to any one of the first aspects.
  • a fourth aspect of the embodiments of the present disclosure provides a device for a PON network, the device being configured as an ONU in the PON network according to any one of the first aspects.
  • a fifth aspect of the embodiments of the present disclosure provides a robot system including the PON network according to any one of the first aspects.
  • the OLT and ONU can perform the corresponding message bus layer module through the corresponding time division and wavelength division multiplexing transmission network. Registration and mutual subscription of message topics, and publication and reception of topic messages, thereby realizing message communication between the OLT and the ONU.
  • the OLT and the ONU are also provided with corresponding state machine modules, and the state machines in the state machine modules can perform corresponding state operations according to events occurring at the corresponding node devices.
  • the OLT which is the master device of network management and control
  • the OLT can interact with the state machine of the ONU of the network management control slave device through the corresponding state machine through the corresponding transmission network, and switch the wavelength channel where the ONU is located when necessary Therefore, the effect of managing and controlling the communication process between the nodes in the PON network is achieved, and the communication flexibility between the communication nodes in the PON network is also improved.
  • FIG. 1 is a schematic diagram of a PON-CAN bus architecture shown in an exemplary embodiment of the present disclosure.
  • FIG. 2 is a schematic structural diagram of a robot system based on a PON-CAN bus architecture according to an exemplary embodiment of the present disclosure.
  • FIG. 3 is a system architecture diagram of an OLT in a PON network according to an exemplary embodiment of the present disclosure.
  • FIG. 4 is a system architecture diagram of an ONU in a PON network according to an exemplary embodiment of the present disclosure.
  • FIG. 5 is a schematic flowchart of a method for a PON network according to an exemplary embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of state switching of a main state machine in an OLT according to an exemplary embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram of state switching of a slave state machine in an OLT according to an exemplary embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of state switching of a slave state machine in an ONU according to an exemplary embodiment of the present disclosure.
  • a PON-CAN bus architecture based on a passive optical fiber network and a symmetric coupler and / or an asymmetric coupler can avoid the influence of electromagnetic interference, and it will not cause bandwidth reduction between levels, so it can provide very high bandwidth.
  • the PON-CAN bus architecture can meet the high-speed transmission requirements at the same time as the number of connected nodes continues to increase, which solves the problems of the existing CAN bus with low communication speed and limited number of node connections.
  • FIG. 1 is a schematic diagram of the PON-CAN bus architecture.
  • the PON-CAN bus architecture includes an OLT (Optical Line Terminal) 101, and an optical fiber bus connected to the OLT 101.
  • the optical fiber bus It is formed by interconnecting multiple asymmetric couplers.
  • the optical fiber bus 102 shown in FIG. 1 is formed by interconnecting a plurality of asymmetric couplers 103.
  • an ONU (Optical Network Unit) device 104 as shown in FIG. 1 is also connected to the optical fiber bus, which is used to realize the conversion of the photoelectric signals between the optical fiber bus and the electronically controlled terminal device, thereby enabling The communication between the total information device 101 and the terminal device is realized.
  • FIG. 2 is a schematic structural diagram of a robot system based on a PON-CAN bus architecture.
  • the upper computer 201 in the robot system shown may be a node including an OLT, and the OLT is used as a Bus master.
  • the median machine system, power management system, lower computer control system, servo system of each limb joint, and corresponding terminal equipment of each limb joint in the robot system are respectively connected with the optical fiber bus of the PON-CAN bus architecture.
  • To the next-level network which are respectively connected to the optical fiber bus through corresponding ONU equipment.
  • the purpose of the embodiments of the present disclosure is to provide a PON network, which can manage and control the communication process between communication nodes in the PON network, and improve the communication flexibility between the communication nodes in the PON network.
  • the PON network can be applied to the internal communication of a robot system, communication between machines, or communication between nodes in an IoT environment. Taking the robot system shown in FIG. 2 as an example, the robot may be an industrial automation robot.
  • the PON network may form a PON-CAN bus architecture with a CAN network in the robot system.
  • the PON network includes an OLT, and at least one ONU connected to the OLT.
  • the OLT as a master device for network management and control includes:
  • a first state machine module configured to run a master state machine that performs a state operation according to an event occurring on the OLT itself, and a slave state machine that performs a state operation according to an event occurring on an ONU connected to the OLT;
  • a first message bus layer module configured to provide a message bus server and a first message bus client to support a user of the first message bus client in the OLT and a user of a second message bus client in the ONU Register and subscribe to message topics and publish and receive topic messages;
  • the ONU as a network management control slave device includes:
  • a second state machine module configured to run a slave state machine that performs state operations according to an event occurring on the ONU itself and according to an event of the slave state machine running in the first state machine module;
  • a second message bus layer module configured to provide the second message bus client to support users of the second message bus client in the ONU to register and subscribe to message topics, and to publish and receive topic messages;
  • a second transmission network for message transmission between the ONU and the OLT
  • the first transmission network and the second transmission network include TWDM (Time and Wavelength Division Multiplexed Network) to enable the ONU to switch between different wavelength channels provided by the OLT. Access.
  • TWDM Time and Wavelength Division Multiplexed Network
  • the PON network may be based on NG-PON2.
  • the OLT includes a first state machine module 31 and a first message bus.
  • the first state machine module 31 includes a master state machine 311 and a slave state machine 312.
  • the master state machine 311 is responsible for managing the OLT itself and the message bus. The state operation of the event. For example, after the OLT enters a normal working state, if the corresponding ONU communication link is activated, the master state machine 311 may separately start the slave state machines 312 corresponding to the corresponding ONU in the OLT. For another example, if the wavelength channel port of the OLT fails, the OLT may switch the wavelength channel in which the ONU is located, thereby improving communication stability.
  • the number of slave state machines 312 in the OLT may be one or more, and each of the slave state machines 312 in the OLT can directly perform a slave state machine in a corresponding ONU connected to the OLT. Interaction to facilitate management of the corresponding ONU.
  • the first message bus layer module 32 includes:
  • the first message bus client 322 is capable of supporting users of the first message bus client to register and subscribe to message topics, and to publish and receive topic messages.
  • a message bus server (the MQTT server 324 is taken as an example in the figure, and the MQTT server is connected to the MQTT-SQ gateway 325), which can support the user of the first message bus client in the OLT and the second message in the ONU Users of the bus client register and subscribe to message topics and publish and receive topic messages.
  • the first transmission network 33 may include:
  • the TWDM-TC sub-layer includes: TWDM-TC function module, physical layer operation management and maintenance PLOAM module 333, AMCC framework 334 (AMCC Framing), AMCC-PHY adapter 335 (AMCC physical adaptation), and TWDM-TC business application Game layer 332 (TWDM Service and Adaptation Sublayer), TWDM-TC FRAMING sublayer 336, TWDM-TC PHY adaptation sublayer 337;
  • the TWDM-TC service adaptation sub-layer includes: a user data adapter (User Data Adapter), an OMCI adapter, and an encapsulation layer engine (XGEM Engine), and the user data adapter is connected to the TWDM-TC function module 331;
  • a user data adapter User Data Adapter
  • OMCI adapter OMCI adapter
  • XGEM Engine encapsulation layer engine
  • the TWDM-TC FRAMING sublayer 336 includes: a bandwidth dynamic allocation DBA (Upstream Bandwidth Mgmt & DBA Control) connected to the TWDM-TC functional module 331, a message connected to the TWDM-TC functional module 331 and a dynamic bandwidth allocation DBA Embedded Header Fields (Embedded Header Fields), PLOAM Partition Module (PLOAM Partition) connected to the Message Header Field Embedded Module and Physical Layer Operation Management and Maintenance PLOAM 333, Connected to the Message Header Field Embedded Module and Encapsulation Engine Encapsulation layer partition module (XGEM Partition);
  • DBA Upstream Bandwidth Mgmt & DBA Control
  • Embedded Header Fields Embedded Header Fields
  • PLOAM Partition PLOAM Partition Module
  • the message header field embedding module is also connected to the PHY burst timing and configuration file control module in the TWDM-TC PHY adaptation sublayer 337, and the AMCC-PHY adapter 335 is also connected to the TWDM-PMD sublayer 338.
  • the physical layer operation management and maintenance PLOAM module 333, the bandwidth dynamic allocation DBA, and the TWDM-TC function module 331 are also connected to the network controller, respectively.
  • the optical network unit management control interface OMCI can be used to support ONU configuration, fault management, performance management, XGEM adaptation layer, and Ethernet services (including MAC bridge LAN) in the operation of the optical access system. service.
  • the physical layer operation management and maintenance PLOAM module 333 is a message-based operation management channel between the OLT and the ONU, and supports PON, including ONU activation, ONU management control channel (OMCC) establishment, encryption configuration, key management, and alarm signaling. Layer management functions.
  • the TWDM-TC function module 332 includes functions such as TWDM channel management, performance management, security key management, and protection.
  • the AMCC framework sub-layer 334 is responsible for constructing and parsing overhead fields, and these fields support necessary PON management functions. .
  • the AMCC-PHY adapter 335 has a function of modifying the bit stream of the modulated optical transmitter, and the purpose is to improve the detection, reception, and rendering characteristics of signals transmitted through the optical medium.
  • the TWDM-TC service adaptation sublayer 336 is responsible for encapsulation, multiplexing, and description of the upper-layer SDU. it includes:
  • OMCI adapter is responsible for filtering and decapsulating the upstream frames. It can support many concurrent channels. These channels can be of a mixed type and are responsible for encapsulating the OMCI PDUs in the OMCI control logic into an appropriate format for transmission to the ONU.
  • User data adapter can be configured to adapt to various upper-layer transmission interfaces.
  • the encapsulation layer engine can be responsible for the multiplexing and filtering of XGEM Port-ID.
  • the TWDM-TC FRAMING sublayer 337 may be responsible for constructing and parsing overhead fields. These fields support the necessary PON management functions. It includes: upstream bandwidth management and DBA control (DBA). Dynamic indication of status and configured communication contracts, the process of allocating uplink passive optical network (PON) capacity among communication bearer entities within the ONU.
  • DBA DBA control
  • the TWDM-PMD sublayer 339 includes a function of modifying the bit stream of the modulated optical transmitter, which can improve the detection, reception, and rendering characteristics of signals transmitted through the optical medium.
  • the first transmission network 33 can respond to the NMC control request of the first state machine module to perform corresponding configuration, thereby supporting related functions of the first state machine module.
  • FIG. 4 is a system architecture diagram of an ONU in a PON network. As shown in FIG. 4, the ONU includes a second state machine module 41, a second message bus layer module 42, and a second transmission network 43.
  • the second state machine module 41 includes a slave state machine 411 that is responsible for managing the corresponding ONU.
  • the slave state machine 411 in the ONU can directly interact with the slave state machine 312 in the OLT connected to the ONU, and can An event occurring on the ONU itself performs a state operation corresponding to the event.
  • the first state machine module 31, the first message bus layer module 32, and the first transmission layer module 33 may also be configured in the same system, and the system is used as a network management control master device in the PON network.
  • the first transmission layer module 33 may be an OLT in the related art, and the first state machine module 31 and the first message bus layer module 32 may be configured on a CPU board of another device. In this case, the running carriers of the first state machine module 31 and the first message bus layer module 32 need to be in the same local area network environment as the OLT.
  • the second transmission layer module 43 may be an ONU in the related art, and the second state machine module 41 and the second message bus layer module 42 may also be configured on a CPU board of another device.
  • the carriers of the second state machine module 41 and the second message bus layer module 42 need to be in the same local area network environment as the ONU.
  • the PON network is connected to the CAN network in the robot system to form a PON-CAN bus architecture.
  • the first message bus layer module 32 is set in the OLT and the second message bus layer module 42 is set in the ONU.
  • the OLT and ONU can register the message topic and subscribe to each other, and issue and receive topic messages through the corresponding message bus layer module through the corresponding TDM TWDM transmission network, thereby realizing the OLT and the ONU.
  • the OLT and the ONU are also provided with corresponding state machine modules, and the state machines in the state machine modules can perform corresponding state operations according to events occurring at the corresponding node devices.
  • the OLT which is the master device of network management and control
  • the OLT can interact with the state machine of the ONU of the network management control slave device through the corresponding state machine through the corresponding transmission network, and switch the wavelength channel where the ONU is located when needed. Therefore, the effect of managing and controlling the communication process between the nodes in the PON network is achieved, and the communication flexibility between the communication nodes in the PON network is also improved.
  • the first state machine module 31 includes:
  • a first message bus client interface 313, configured to support the first state machine module as a user of the first message bus client 322 in the OLT to register and subscribe to message topics and publish with the message bus server 324 And receive subject messages;
  • the first network controller 315 is configured to perform, by the first state machine module, an NMC (Network Management and Control Subsystem, NMC) service configuration on a transmission network of the OLT.
  • NMC Network Management and Control Subsystem
  • the service flow tag can be used to classify the subject message for which registration is requested.
  • the service flow tag It can be XGEM Port-ID, which is carried in the inner VLAN ID field of the Ethernet frame.
  • the MQTT server may include in the REGACK message returned to the ONU for responding to the message subject registration request the MQTT server to register for the request.
  • Service flow token assigned by the message subject Thereafter, the messages published by the ONU to the topic later carry the service flow mark.
  • the service specification information may include one or more of specification version information, encryption mode information, distribution mode information, distribution mode information, and bandwidth description information.
  • the specification version information is used to identify a current service specification; the encryption mode information is used to specify whether data distribution is encrypted; the release mode information is used to specify data transmission between an MQTT-SN client and an MQTT server Mode; the distribution mode information is used to specify a data transmission method between the MQTT server and the subscribed MQTT-SN client; the bandwidth description information is used to specify a fixed bandwidth, a guaranteed bandwidth, and a maximum bandwidth for the topic message release.
  • Table 1 is an example of ServiceSpec information:
  • the relationship between the fixed bandwidth, the guaranteed bandwidth, and the maximum bandwidth can refer to the corresponding description in the G-PON technical specification ITU-T G.984.3 standard.
  • DISTRIBUTION Encryption when the bit value carried in the encryption mode information is 0, it indicates that the transmission path from the gateway of MQTT-SN to the subscribed MQTT-SN client is not encrypted, Suitable for MQTT-SN gateway from MQTT-SN gateway to ONU and OLT client.
  • the value of the bit carrying the encryption mode information is 1, it indicates that the transmission path from the MQTT-SN gateway to the subscribed MQTT-SN client is encrypted, which is suitable for the MQTT-SN client from the MQTT-SN gateway to the ONU.
  • DISTRIBUTION refers to the transmission path from the MQTT-SN gateway to the subscribed MQTT-SN client, which is suitable for unicast and multicast.
  • PUBLISH Mode information when the value of the corresponding bit is 00, it indicates that the transmission path from the MQTT-SN client to the MQTT-SN gateway uses shared unicast to transmit data, which is suitable for ONU and OLT. MQTT-SN client. When the value of the bit carrying the encryption mode information is 01, it indicates that the transmission path from the MQTT-SN client to the MQTT-SN gateway is a unicast transmission of data, which is suitable for the MQTT-SN client on the ONU and the OLT.
  • PUBLISH here specifically refers to the transmission path from the MQTT-SN client to the MQTT-SN gateway, which can only be unicast.
  • the distribution mode information (DISTRIBUTION Mode) when the value of the bit carrying the distribution mode information is 00, it indicates that the transmission path from the MQTT-SN gateway to the subscribed MQTT-SN client is shared unicast, which is suitable for ONUs and OLTs.
  • MQTT-SN client on the Internet when the value of the bit carrying the distribution mode information is 01, it means that the MQTT-SN gateway to the subscribed MQTT-SN client uses dedicated unicast to this section of transmission path, suitable for ONU and OLT MQTT-SN client; when the value of the bit carrying the distribution mode information is 10, it means that the MQTT-SN gateway to the subscribed MQTT-SN client uses shared multicast for this transmission path, which is suitable for the MQTT on the ONU and the OLT -SN client; when the value of the bit carrying the distribution mode information is 11, it means that the MQTT-SN gateway to the subscribed MQTT-SN client uses a dedicated multicast to this transmission path, which is suitable for the MQTT-ONU and OLT- SN client.
  • DISTRIBUTION here specifically refers to the transmission path from the MQTT-SN gateway to the subscribed MQTT-SN client, which can be unicast and multicast.
  • the second state machine module 41 includes:
  • a second message bus client interface 412 configured to support the second state machine module 41 as a user of the second message bus client 421 in the ONU, register and subscribe to a message topic and publish with the message bus server 324 And receive subject messages;
  • a second network management control server interface 413 configured to support the second state machine module 41 to implement a service specification and a service flow mark of the communication between the OLT and the ONU through the second message bus layer module 42;
  • the second network controller 414 is configured for the second state machine module 41 to perform NMC service configuration on the transmission network 43 of the ONU.
  • the first message bus layer module 32 includes:
  • a message bus server interface 321 is configured to support the first state machine module 31 to register and subscribe to a message topic, and to publish and receive a topic message through the first message bus client 322 (that is, the first message bus client in the OLT). .
  • the message bus server is configured to support a first message bus client 322 in the OLT on the message bus and / or a second message bus client 423 in the ONU to register and subscribe to a message topic, and to publish and receive topic messages.
  • the network adapter 326 is connected to the transmission network 33 of the OLT, and implements adaptation of the first message bus layer module 32 to the transmission network 33 of the OLT.
  • the network adapter 326 stores a message transmission path for each message subject between the OLT and the ONU, which can support remote and / or between the message bus server 324 and a client of the message bus server. Local messaging.
  • the network adapter may store transmission path information of each message topic between the OLT and the ONU, such as a service flow tag Flow tag, a service specification Service spec, information of a subject message issuer, and an upstream T-CONT.
  • the OLT and ONU can update the corresponding stored in the network adapter through the corresponding network management control server interface and network management control client interface. Transmission path information.
  • the OLT and the ONU can update the network through the corresponding network management control server interface and network management control client interface according to the switching result (COMPLETE, NACK, or ROLLBACK). Corresponding transmission path information stored in the adapter.
  • the second message bus layer module 42 may include:
  • a network management control client interface 422 configured to support the second state machine module 41 to implement a service specification and a service flow mark of the communication between the OLT and the ONU through the second message bus layer module 42;
  • a second message bus client 423 to support a user of the second message bus client 423 in the ONU to communicate with the message bus server 324 to implement registration and subscription of message topics and publication and reception of topic messages;
  • a network adapter 424 is connected to the transmission network 43 of the ONU, and implements the adaptation of the second message bus layer module 42 to the transmission network 43 of the ONU.
  • the network adapter 424 stores the OLT and the transmission network 43. Message transmission path for each message subject between ONUs
  • the OLT and the ONU can register, subscribe to, and subscribe to topic messages through the message bus server through the corresponding message bus layer module and the corresponding transmission network through their corresponding state machine modules. Publish and receive, thereby establishing a publish / subscribe messaging model.
  • the state machine module corresponding to the OLT and ONU further includes a network management control server interface
  • the message bus layer module corresponding to the OLT and ONU further includes a network management control client interface, so that the OLT and the ONU can be supported.
  • the service specification and service flow mark of the communication between the ONUs That is to say, during the communication process, the data channel of the subject message requesting publication and the subscription process can be configured according to the specific service specification information, and then the communication process between nodes in the PON network can be managed.
  • the slave state machine and the master state machine in the first state machine module may share the first message bus client interface and / or the first network management control server interface.
  • the performing, by the first state machine module, the NMC service configuration on the transmission network of the OLT through the first network controller includes:
  • the first network controller 315 may serve as a control interface of the first state machine module 31 to the first transmission network 33 of the OLT.
  • the first network controller 315 may configure the corresponding service request of the first state machine module 31 to the transmission network 33 according to the actual software and hardware resource status of the transmission network.
  • the first network controller 315 may respond to the corresponding service request of the first state machine module 31 to the OMCI 331, Configure and manage QoS resources such as PLOAM333, DBA, and possible traffic classification.
  • the master state machine is configured to start a slave state machine in the OLT for interaction with the ONU after an ONU connected to the OLT is activated.
  • the main state machine is configured to perform a state operation according to at least one of the following events:
  • An event used to indicate that the first state machine module requests a message bus server in the first message bus layer module to register a message subject.
  • Table 2 is a schematic diagram of the events that a main state machine needs to process:
  • the NMCM_LINK_UP shown is an event characterizing the activation of the OLT;
  • the NMCM_LINK_DN shown is an event signifying the deactivation of the OLT;
  • the NMCS_LINK_UP shown is an event signifying the activation of the link between the OLT and the ONU;
  • the NMCS_LINK_DN shown is an event that characterizes the deactivation of the link between the OLT and the ONU;
  • the NMCS_LINK_TUNING_BEGIN is shown that it is an event that the ONU connected to the OLT starts to switch wavelength channels;
  • the NMCS_LINK_TUNING_END is shown that it is access The event that the ONU of the OLT switches the end of the wavelength channel;
  • MB_BROKER_UP shown is an event that represents the activation of the message bus server in the first message bus layer module;
  • MB_BROKER_DN is shown that represents the message bus server in the first message bus layer module Deactivation event;
  • the slave state machine in the first state machine module is configured to perform a state operation according to at least one of the following events:
  • Table 3 is a schematic diagram of events that a slave state machine needs to process in a first state machine module:
  • NMCS_LINK_UP is an event characterizing a link activation between the OLT and the ONU
  • NMCS_LINK_DN is an event characterizing a link deactivation between the OLT and the ONU
  • NMCS_LINK_TUNING_BEGIN is a characterization An ONU that accesses the OLT starts to switch wavelength channels
  • the NMCS_LINK_TUNING_END shown is an event that indicates that the ONU that accesses the OLT switches the wavelength channel
  • NMC_ACCESS_REQ is an event that characterizes the ONU that issues an access request
  • NMC_IDENT_RESP is the characterization The event in which the ONU performs an identity response response
  • NMC_CONFIG_RESP is an event that characterizes the ONU to perform a configuration response
  • NMC_STATUS_RESP is an event that characterizes the ONU in a status update response.
  • the slave state machine in the first state machine module can perform corresponding state operations according to the events shown in Table 3,
  • the slave state machine in the second state machine module is configured to perform a state operation according to at least one of the following events:
  • An event used to indicate that the OLT sends a status update request to the ONU is an event used to indicate that the OLT sends a status update request to the ONU.
  • Table 4 is a schematic diagram of the events that the slave state machine needs to process in a second state machine module:
  • the NMCS_LINK_UP shown is an event characterizing a link activation between the ONU and the OLT;
  • the NMCS_LINK_DN is an event signifying a link deactivation between the ONU and the OLT;
  • the NMCS_LINK_TUNING_BEGIN is a characterization The event that the ONU connected to the OLT starts to switch the wavelength channel;
  • the NMCS_LINK_TUNING_END shown is the event that characterizes the end of the ONU that accesses the OLT to switch the wavelength channel;
  • MB_CONNACK is the event that characterizes the second state machine module and the first message bus An event that the message bus server in the layer module performs connection confirmation;
  • MB_REGISTER is an event that characterizes the message subject registered by the message bus server of the second state machine module in the first message bus layer module;
  • NMC_IDENT_REQ is an event that characterizes the OLT to The ONU sends an event for an identity response request;
  • the value of the CPI (Channel Partition Index) of the ONU is 0, so that the ONU can switch access between multiple wavelength channels provided by the same wavelength port of the OLT.
  • NG-PON2 network-based network
  • operators can use any standard (such as service profile, universality of equipment or geographical location) to subdivide the TWDM and / or PtP WDM channel set in the system into non-overlapping Subset.
  • Each such subset of channels is called a channel partition and is identified by a unique index in the NG-PON2 system.
  • the channel partition index (CPI) is contained in the Channel_ProfilePLOAM message.
  • the ONU carries a channel partition index, which is stored in non-volatile memory and is guaranteed to be retained through ONU reactivation, hot and cold restarts, power cycling and / or power loss.
  • the CPI value of the ONU can be read and written through OMCI.
  • the manner of setting the CPI value of the ONU in the PON network to 0 supports the switching of the ONU in each wavelength channel provided by the OLT in the PON network. For example, when a certain wavelength channel of the OLT is to be upgraded with software, the OLT can control the ONU on the wavelength channel to perform channel switching, thereby reducing communication interruption time.
  • the identification information of the OLT includes a wavelength port ID of the OLT and does not include a wavelength channel ID provided by the OLT
  • the identification information of the ONU includes a wavelength port ID of the OLT and does not include the OLT The provided wavelength channel ID, so that when the ONU switches between different wavelength channels, the identification information of the ONU and the OLT connected to the ONU does not change; and / or,
  • the transmission container T-CONT allocated to the same ONU under the same wavelength port of the OLT, the XGEM port-ID of the encapsulation layer port, and the VLAN of the virtual local area network remain unchanged.
  • wavelength port (abbreviated as wlPort) can be used as the identifier of an OLT.
  • the OLT identification method in the PON network may be OLT card / Wavelength port.
  • the OLT card of the OLT is 1, and the Wavelength port is 2, the flag of the corresponding OLT is 1/2.
  • the Wavelength port may correspond to 1 to 8 wavelength channels (corresponding to 1 to 8 wavelength channel ports, which are represented by OLT CT).
  • ctPort may be used to mark a wavelength channel port (OLT) corresponding to a wavelength channel on the wavelength port Wavelength port.
  • the source OLT CT and the destination OLT CT can be marked with sctPort and dctPort, respectively.
  • the ONUs may be assigned the same ONU ID. That is, the ONU can keep the ONU ID unchanged during the process of switching between different wavelength channels.
  • the OLT assigns the transmission container T-CONT, the encapsulation layer port X-GEM port-ID, and the virtual local area network VLAN to the same ONU under the same wavelength port. constant. If any of the ONU ID, T-CONT, XGEM, Port-ID, and VLAN of the encapsulation layer changes, you need to restart and activate the corresponding ONU.
  • the NMC message bus may also be identified through the foregoing OLT identification method.
  • the corresponding NMC message bus may be identified through an OLT card / Wavelength port.
  • the MQTT-SN client ID on the message bus may be recorded as a corresponding OLT card / Wavelength port.
  • the identifier of the MQTT-SN client on the ONU may be OLT card / Wavelength port / ONU ID.
  • Consistent equalization delay method Consistent equalization delay method
  • the IDs of all communication nodes can remain unchanged during the ONU switching in different wavelength channels under the same wavelength port. Based on the message subject defined by such communication node IDs It can also remain unchanged, which can reduce unnecessary resynchronization overhead during wavelength channel switching, reduce message communication interruption time and packet loss.
  • the message bus server 324 in the first message bus layer module includes an MQTT server, and when the MQTT server is initialized, the first state machine module pre-registers NMC management for ONUs that need to access the OLT. Control channel
  • the NMC management control channel includes: a first downlink management control channel for downlink multicast messages from the OLT to all ONUs or a specified portion of the ONUs; and a first uplink management control channel for uplink orders from the ONU Broadcast the message to the OLT, and then multicast the message to all ONUs.
  • the main state machine in the first state machine module of the OLT receives MB_REGISTER (refer to Table 4) from an MQTT server or an MQTT-SN gateway connected to the MQTT, and the OLT and the corresponding ONU After the transmission channel is established in the underlying physical transmission network (for example, the downlink multicast XGEM Port-ID and VLAN of the G-PON), the first downlink management control channel takes effect.
  • MB_REGISTER (refer to Table 4) from an MQTT server or an MQTT-SN gateway connected to the MQTT
  • the OLT and the corresponding ONU After the transmission channel is established in the underlying physical transmission network (for example, the downlink multicast XGEM Port-ID and VLAN of the G-PON), the first downlink management control channel takes effect.
  • the first uplink management control channel receives the MB_REGISTER from the MQTT-SN gateway / MQTT server in the slave state machine in the second state machine module, and establishes a transmission channel from the ONU to the OLT in the underlying physical transmission network (for example, G-PON's uplink T-CONT (Transmission Container), XGEM (Port-ID and VLAN) will take effect later.
  • G-PON's uplink T-CONT Transmission Container
  • XGEM Port-ID and VLAN
  • the NMC management control channel further includes:
  • a second downlink management control channel configured to downlink a unicast message from the OLT to a designated ONU; and / or,
  • the second uplink management control channel is used for uplink unicast messages from the ONU to the OLT.
  • the second downlink management control channel only needs to receive MB_REGISTER from the MQTT-SN gateway / MQTT server in the slave state machine of the second state machine module, and establish the physical transmission network from the OLT to the specific The ONU's transmission channel (such as G-PON's downstream unicast XGEM Port-ID and VLAN) becomes effective afterwards.
  • the second uplink management control channel receives the MB_REGISTER from the MQTT-SN gateway / MQTT server in the slave state machine of the second state machine module, and establishes a physical transport network from the ONU to the OLT at the bottom layer Transmission channels (such as G-PON's uplink T-CONT, XGEM, Port-ID, and VLAN) will be valid afterwards.
  • the bottom layer Transmission channels such as G-PON's uplink T-CONT, XGEM, Port-ID, and VLAN
  • the default configuration of the PON network may be that all MQTT-SN control messages and message topics related to network management control are on the downlink of the OLT to the G-PON of all ONUs.
  • the multicast XGEM Port-ID and VLAN, and the upstream T-CONT, XGEM Port-ID and VLAN of the G-PON from the ONU to the OLT are transmitted.
  • uplink and downlink transmission channels can also be established separately according to the application requirements of the system.
  • the PUBLISH transmission channel corresponding to other MQTT-SN topic message data can use the topic message data service specification (Service Spec) according to specific message characteristics.
  • Service Spec topic message data service specification
  • NMC Service to establish G-PON uplink and downlink T-CONT, XGEM Port-ID and VLAN separately for transmission.
  • the topic publishing message transmission method can be:
  • the MQTT server When the MQTT server processes the topic registration message issued by the MQTT-SN client of the ONU, it can use the bandwidth description information in the service specification information and the existing multicast, XGEM port, and T-CONT usage status of the published ONU, and the current OLT With and without multicast, XGEM port, and T-CONT, determine how to allocate and use multicast, XGEM port, and T-CONT.
  • the MQTT server can use OMCI and PLOAM to perform corresponding dynamic configuration on the OLT and ONU, and will dynamically adjust the DBA allocation of the OLT accordingly.
  • the MQTT server processes the topic subscription of the ONTT's MQTT-SN client to subscribe to the SUBSCRIBE message, it can use the bandwidth description information in the service specification information provided by the ONU that publishes the topic message, as well as the existing multicast and XGEM ports of the subscribed ONU.
  • the usage of the OLT, the existing and remaining multicast of the OLT, and the situation of the XGEM port determine how to allocate and use the multicast and XGEM port.
  • the MQTT server can use OMCI and PLOAM to perform corresponding dynamic configuration on the OLT and the subscribed ONU.
  • using the PON network can also isolate the transmission channel of the MQTT-SN control message from the transmission channel of the subject message data release to ensure the reliability of the transmission of the MQTT-SN control message. That is, the topic release message is transmitted by the data channel, and all other MQTT-SN control messages are transmitted by the control channel.
  • the present disclosure also provides a method for a PON network, which can be applied to the PON network described in any one of the above embodiments.
  • a method for a PON network which can be applied to the PON network described in any one of the above embodiments.
  • NMC-M is the master device of the network management control (for example, OLT)
  • NMC-S is a network management control slave device (such as ONU):
  • FIG. 5 is a schematic flowchart of a method for a PON network according to an exemplary embodiment of the present disclosure. As shown in FIG. 5, the method includes:
  • the first state machine module of the OLT performs first message subject registration on the first message bus layer module server of the OLT, and sends an NMC configuration instruction to an ONU connected to the OLT.
  • the configuration method of the PON itself can be used to transmit the corresponding initial configuration of the network management control and the initial configuration of the message bus from the OLT to the ONU through OMCI for corresponding configuration.
  • the MAC address of the gateway of the message bus may be transmitted to the ONU through the OMCI.
  • the second state machine module of the ONU performs NMC service configuration on the second transmission network of the ONU according to the NMC configuration instruction, and performs the NMC service on the message bus server through the second message bus layer module of the ONU. Second message subject registration.
  • the OLT and the ONU establish message communication in a publish / subscribe mode in the first wavelength channel.
  • the ONU when the preset condition is satisfied, the ONU can switch access between different wavelength channels provided by the OLT.
  • a first message bus client, a message bus server, and a corresponding gateway may be set in a message bus layer module of the OLT, so as to support the first message bus client in the OLT.
  • Users at the end, and users of the second message bus client in all related ONUs register and subscribe to message topics, and publish and receive topic messages. That is, a device provided with a corresponding message bus client can be connected to the message bus server through a corresponding message bus server interface, and then can register and subscribe to message topics and publish and receive topic messages through the message bus server, thereby achieving Messages are transmitted between devices through a publish / subscribe message communication mode.
  • the message bus server works at the data link layer, which can avoid extra processing and transmission overhead working at the IP layer or the network layer.
  • the preset condition includes at least one of the following conditions:
  • the OLT CT of the first wavelength port fails, for example, after an OLT CT of the first wavelength port fails, the ONU of the wavelength channel is switched to another wavelength channel, or the ONU line card fails After that, switch ONU to other wavelength channels;
  • the board of the ONU fails
  • the OLT CT of the first wavelength port enters a software upgrade state.
  • the ONU switching access between different wavelength channels provided by the OLT under the condition that the preset conditions are met includes:
  • all ONUs of the plurality of wavelength channels are switched to the first wavelength channel, where the first wavelength channel is the foregoing Any one of multiple wavelength channels.
  • the ONU in the higher-loaded wavelength channel can be switched to the lower-loaded wavelength channel according to the load capacity of the wavelength channel, so as to achieve the effect of controlling the load capacity and capacity of each wavelength channel.
  • the idle degree of the PON network when the PON network is relatively idle (for example, at night), multiple ONUs can be switched to the same wavelength channel, thereby reducing the energy consumption of the OLT.
  • the OLT CT of the destination wavelength channel shall:
  • the OLT is controlled to transmit other non-network management control related topic messages in a best-effort mode.
  • the ONU shall:
  • the OLT can switch the wavelength channel in which the ONU is located according to its wavelength channel and the actual situation of the ONU, thereby improving the flexibility and communication between the communication nodes in the PON network. stability.
  • the parameters in the NMC configuration instruction configured by the first message bus layer module include at least one of the following parameters:
  • a parameter for monitoring the operating status of the OLT and an ONU connected to the OLT wherein if the OLT does not receive a communication message from the ONU within a threshold duration, or if the ONU is in If no communication message is received from the OLT within the threshold duration, it is determined that the communication between the OLT and the ONU is disconnected;
  • Table 7 shows the configuration parameters of a first message bus layer module:
  • NMCMNodeId is a parameter that characterizes the node ID of the OLT
  • NMCSNodeId is a parameter that characterizes the node ID of the ONU
  • NMCDeathChkTimer is a parameter that monitors the operating status of the OLT and the ONU that communicates with the OLT.
  • NMCHealthChkTimer is a health check timeout parameter for the OLT to initiate a status update request to the ONU, and / or for the ONU to report its status to the OLT
  • NMCM2AllCtrlTopicName is a characteristic Parameters of the names of the multicast control topics from the OLT to all ONUs
  • NMCS2AllCtrlTopicName is a parameter that characterizes the names of the multicast control topics from the ONU to the OLT and all ONUs
  • the parameters of the address DefaultMBGwId is a parameter characterizing the ID of the MQTT-SN gateway; DefaultMBGwMACAddress is a parameter characterizing the MAC address of the default MQTT-SN gateway.
  • step S51 the method includes:
  • the main state machine in the first state machine module of the OLT responds to a message bus server activation event in the first message bus layer module, and a state operation corresponding to the event occurs.
  • the state operation includes at least: Sending a message bus connection request to the message bus server.
  • the message bus server activation event may be an autonomous event of the message bus server, such as the MB_BROKER_UP event shown in Table 2.
  • the main state machine in the first state machine module of the OLT responds to a connection confirmation event with a message bus server in the first message bus layer module, and a state operation corresponding to the event occurs.
  • the master state machine in the first state machine module of the OLT responds to a message bus server registering a message subject event in the first message bus layer module, and a state operation corresponding to the event occurs.
  • the message bus server registration message subject event in the first message bus layer module may be the MB_REGISTER event shown in Table 2.
  • the message bus server uses the event to predefine the master device of the message bus server through the event.
  • the control message subject and the slave device control message subject are sent to the master state machine.
  • the main state machine performs a corresponding state operation according to the MB_REGISTER event, and updates a control theme.
  • step S51 after the sending an NMC configuration instruction to the ONU, the method includes:
  • the OLT When the OLT receives a message indicating that the ONU completes the NMC configuration, it triggers an event indicating the activation of the OLT, and the main state machine in the first state machine module of the OLT responds to the event, A state operation corresponding to the event occurred.
  • the ONU may send a message to the OLT to indicate that the ONU completes the NMC configuration, thereby triggering the NMCM_LINK_UP event shown in Table 2, and the OLT starts normal operation.
  • the OLT When receiving the message bus server connection request sent by the ONU, the OLT triggers an event that is used to characterize the activation of the link between the ONU and the OLT.
  • the first state machine module of the OLT In response to the event, the main state machine occurs, and a state operation corresponding to the event occurs.
  • the OLT when receiving the message bus server connection request sent by the ONU, the OLT triggers the NMCS_LINK_UP event shown in Table 2. After the OLT determines that the ONU works normally according to the NMCS_LINK_UP event, the master state machine can activate the slave state machine corresponding to the ONU in the OLT, so that the slave state machine in the OLT can communicate with all The slave state machine in the ONU interacts with the message bus server to realize the communication between the OLT and the ONU.
  • the method further includes:
  • the OLT When the OLT detects that an event meeting the preset condition occurs, it triggers an event that is used to characterize that the ONU starts to switch wavelength channels, and the main state machine in the first state machine module of the OLT responds to the An event occurs with a state operation corresponding to the event.
  • the state operation includes at least: sending a wavelength channel switching request to the ONU.
  • the OLT may trigger an NMCS_LINK_TUNING_BEGIN event that is used to indicate that the ONU starts to switch wavelength channels, and switch the ONU to In the second wavelength channel of the OLT.
  • the OLT can send to the ONU.
  • the OLT When the OLT receives an instruction for characterizing completion of the ONU wavelength channel switching, it triggers an event for characterizing the end of the ONU switching wavelength channel, and the main state machine in the first state machine module of the OLT In response to the event, a status operation corresponding to the event occurs.
  • the ONU may send a wavelength channel switching success instruction to the OLT through the destination wavelength channel after the wavelength channel switching is successful, triggering the NMCS_LINK_TUNING_END event.
  • the method further includes:
  • the OLT When receiving the message bus server connection request sent by the ONU, the OLT triggers an event that is used to characterize the activation of the link between the ONU and the OLT.
  • the first state machine module of the OLT The slave state machine responds to the event, and a state operation corresponding to the event occurs.
  • the OLT when receiving the message bus server connection request sent by the ONU, the OLT triggers the NMCS_LINK_UP event shown in Table 2.
  • the slave state machine in the OLT changes to the active state in response to the event.
  • the OLT When the OLT receives the message of the message bus server connection request sent by the ONU, the OLT triggers an event for characterizing the access request issued by the ONU, and the slave state machine in the first state machine module of the OLT In response to the event, a state operation corresponding to the event occurs, and the state operation includes at least sending an identity response request (for example, NMC_IDENT_REQ) to the ONU.
  • an identity response request for example, NMC_IDENT_REQ
  • the OLT When the OLT receives the identity response response sent by the ONU, an event for characterizing the ONU to respond to the identity response is triggered, and the slave state machine in the first state machine module of the OLT responds to the event, A state operation corresponding to the event occurs, the state operation includes at least: sending a configuration request to the ONU for configuring a slave state machine in the second state machine module of the ONU.
  • the OLT may configure a node ID of a device connected to the ONU by sending a configuration request (such as NMC_CONFIG_REQ) to the ONU.
  • a configuration request such as NMC_CONFIG_REQ
  • the OLT When the OLT receives the configuration response sent by the ONU, an event for triggering the configuration response of the ONU is triggered.
  • the slave state machine in the first state machine module of the OLT responds to the event, and a corresponding event occurs.
  • the state operation includes at least: sending a status update request (such as NMC_STATUS_REQ) to the ONU to implement the slave state machine and the second state of the ONU in the first state machine module of the OLT Between slave state machines in the machine module.
  • a status update request such as NMC_STATUS_REQ
  • a state operation corresponding to the event may occur, and the slave state machine in the OLT enters a normal operating state.
  • an event for triggering the status update of the ONU is triggered, and a slave state machine in the first state machine module of the OLT occurs in response to the event. Action corresponding to the state of the event.
  • the OLT may request to stop the ONU.
  • the method further includes:
  • the OLT When the OLT detects that an event meeting the preset condition occurs, it triggers an event used to characterize that the ONU starts to switch wavelength channels, and the slave state machine in the first state machine module of the OLT responds to the An event occurs with a state operation corresponding to the event.
  • the slave state machine in the first state machine module of the OLT may respond to the NMCS_LINK_TUNING_BEGIN event, reset the NMCDeathChkTimer and stop the NMCHealthChkTimer to monitor the ONU switch state .
  • the slave state machine in the OLT may request through the NMC_STOP_REQ instruction Stopping the ONU, and stopping the NMCDeathChkTimer and NMCHealthChkTimer.
  • an event for characterizing the end of the ONU switching wavelength channel is triggered, and the slave state machine in the first state machine module of the OLT In response to the event, a status operation corresponding to the event occurs.
  • the slave state machine may set M2AllCtrlTopicChan and S2AllCtrlTopicChan according to the wavelength channel after the switching is completed.
  • the M2AllCtrlTopicChan is a wavelength channel of the multicast control topic from the NMC-M node to all NMC-S nodes
  • the S2AllCtrlTopicChan is the multicast control topic of the NMC-S node to the NMC-M node and all NMC-S nodes.
  • Wavelength channel NMC-S first uplink unicast, then downlink multicast.
  • the method further includes:
  • the ONU Upon receiving the NMC configuration instruction sent by the OLT, the ONU triggers an event for characterizing a link activation between the ONU and the OLT, and the slave in the second state machine module of the ONU The state machine responds to the event, and a state operation corresponding to the event occurs, such as setting the M2AllCtrlTopicChan and S2AllCtrlTopicChan according to the source wavelength channel.
  • the ONU When the ONU receives the message of the message bus server connection confirmation sent by the OLT, the ONU triggers an event for characterizing the connection confirmation of the second state machine module and the message bus server in the first message bus layer module.
  • the slave state machine in the second state machine module of the ONU responds to the event, and a state operation corresponding to the event occurs.
  • a slave state machine in the second state machine module of the ONU responds to a registered message subject event of a message bus server in the first message bus layer module, and a state operation corresponding to the event occurs;
  • the ONU When the ONU receives the identity response request sent by the OLT, it triggers an event used to characterize the OLT sending an identity response request to the ONU, and the slave state machine in the second state machine module of the ONU responds At the event, a status operation corresponding to the event occurs, and the status operation at least includes: sending an identity response response (such as NMC_IDENT_RESP) to the OLT.
  • an identity response response such as NMC_IDENT_RESP
  • the ONU When the ONU receives a configuration request sent by the OLT, it triggers an event used to characterize that the OLT sends a configuration request to the ONU, and a slave state machine in the second state machine module of the ONU responds to the An event occurs with a state operation corresponding to the event.
  • the state operation includes at least: sending a configuration response (such as NMC_CONFIG_RESP) to the OLT.
  • the ONU receives a status update request sent by the OLT, and triggers an event for characterizing the OLT to send a status update request to the ONU.
  • the slave state machine in the second state machine module of the ONU responds to In this event, a state operation corresponding to the event occurs.
  • the state operation includes at least: sending a status update response (such as NMC_STATUS_RESP) to the OLT to implement the slave state machine and the state machine in the first state machine module of the OLT. Interaction between the slave state machines in the second state machine module of the ONU.
  • the method further includes:
  • a slave state machine in the second state machine module of the ONU When the ONU receives a wavelength channel switching request sent by the OLT, a slave state machine in the second state machine module of the ONU responds to the event, and a state operation corresponding to the event occurs.
  • the state operation may include : Sending a channel switching response to the OLT and resetting the NMCDeathChkTimer, and stopping the NMCHealthChkTimer.
  • the state operation includes at least: sending a wavelength channel switching completion message to the OLT.
  • the slave state machine in the OLT may also set the parameters M2AllCtrlTopicChan and S2AllCtrlTopicChan according to the destination wavelength channel, and restart setting the NMCDeathChkTimer and NMCHealthChkTimer.
  • the following describes the process of establishing a connection control by the network management control subsystem in the PON network of the present application through an embodiment.
  • the OLT identified by 1/2 and the message bus server and the ONU identified by 1/2/3 pass through the PON network.
  • Establish a control connection Referring to Table 6, the main state machine in the first state machine module of the OLT responds to the MQTT-SN message bus server activation event MB_BROKER_UP in the first message bus layer module, and sends a message bus connection request MB_CONNECT to the message bus server. After receiving the MB_CONNACK message fed back by the MQTT-SN server or the gateway, the connection between the main state machine and the MQTT-SN server is successful. After that, the MQTT-SN server may send an MB_REGISTER instruction to the master state machine, and send the predefined master device control message subject and topic ID, and the slave device control message subject and topic ID to the master state machine.
  • the OLT may also send an NMC configuration instruction (PON_NMC_CONFIG_REQ (OMCI / PLOAM: NMC-M, NMC-S, MB)) to an ONU connected to the OLT.
  • PON_NMC_CONFIG_REQ OMCI / PLOAM: NMC-M, NMC-S, MB
  • the configuration method of the PON itself can be used to transmit the initial configuration of the corresponding network management control, the initial configuration of the message bus, etc. from the OLT to the ONU for configuration through OMCI.
  • the NMCS_LINK_UP event is triggered, and the corresponding ONU starts to run normally.
  • the slave state machine in the ONU may also request to establish a connection with the MQTT-SN server by sending an MB_CONNECT instruction to the MQTT-SN server. And, after the connection is successful, in response to the MB_REGISTER instruction sent by the MQTT-SN server, receiving a predefined master device control message subject and subject ID, and a slave device control message subject and subject ID.
  • the ONU may also send a configuration result message PON_NMC_CONFIG_RESP (OMCI / PLOAM) to the OLT after the configuration is successful, and trigger the NMCM_LINK_UP event according to the PON_NMC_CONFIG_RESP (OMCI / PLOAM) event to activate the OLT.
  • the OLT may trigger an NMCS_LINK_UP event according to the PON_NMC_CONFIG_RESP (OMCI / PLOAM) message, and activate the corresponding slave state machine in the OLT through the master state machine in the OLT.
  • the slave state machine in the OLT and the slave state machine in the ONU can directly interact through the MQTT-SN message bus, and transmit control topic messages through the established corresponding control channel, so as to facilitate OLT management and control.
  • a communication node device in the PON network can directly interact through the MQTT-SN message bus, and transmit control topic messages through the established corresponding control channel, so as to facilitate OLT management and control.
  • the ONU may send a connection request NMC_ACCESS_REQ to the OLT.
  • the ONU may receive the OLT by receiving the OLT.
  • the manner of sending a status update request and sending a status update response to the OLT implement interaction with the OLT.
  • the status update request may be sent periodically by the OLT.
  • the OLT determines the connection of the ONU by sending the status update request to the ONU and receiving the response of the ONU to the status update request. Status to manage and control the ONU.
  • the above embodiments have combined the state switching diagram of the master state machine and the slave state machine in the OLT and the slave state machine in the ONU.
  • Various operations of the master state machine and the slave state machine, as well as the slave state machine in the ONU have been described in detail, and this disclosure will not repeat them here.
  • the present disclosure also provides an apparatus for a PON network, the apparatus being configured as an OLT in the PON network described in any of the above embodiments.
  • the present disclosure also provides an apparatus for a PON network, the apparatus being configured as an ONU in the PON network described in any of the above embodiments.
  • the present disclosure also provides a robot system including the PON network described in any one of the above embodiments.
  • the robot system is provided with a first message bus layer module in the OLT and a second message bus layer module in the ONU, and the OLT and the ONU can pass the corresponding message bus layer module through the corresponding time division and wavelength division multiplexing.
  • the transmission network performs registration and mutual subscription of message topics and release and reception of topic messages, thereby realizing message communication between the OLT and the ONU.
  • the OLT and the ONU are also provided with corresponding state machine modules, and the state machines in the state machine modules can perform corresponding state operations according to events occurring at the corresponding node devices.
  • the OLT which is the master device of the network management control
  • the OLT can interact with the state machine of the ONU of the network management control slave device through the corresponding state machine through the corresponding transmission network, and switch the wavelength channel where the ONU is located when needed. Therefore, the effect of managing and controlling the communication process between the nodes in the PON network is achieved, and the communication flexibility between the communication nodes in the PON network is also improved.

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Abstract

L'invention concerne un réseau PON, un procédé et un appareil pour un réseau PON, et un système robotisé, le réseau PON comprenant un OLT et une ONU connectée à l'OLT. L'OLT, en tant que dispositif de commande de gestion de réseau maître, comprend : un premier module de machine d'état, utilisé pour exécuter une machine d'état maître et une machine d'état esclave; un premier module de couche de bus de message, utilisé pour fournir un serveur de bus de message et un premier client de bus de message; et un premier réseau de transmission, utilisé pour transmettre des messages entre l'OLT et l'ONU. L'ONU, en tant que dispositif de commande de gestion de réseau esclave, comprend : un second module de machine d'état, utilisé pour exécuter une machine d'état esclave qui effectue des opérations d'état sur la base d'un événement se produisant dans l'ONU et sur la base d'un événement dans la machine d'état esclave dans le premier module de machine d'état; un second module de couche de bus de message, utilisé pour fournir un second client de bus de message; et un second réseau de transmission, utilisé pour transmettre des messages entre l'ONU et l'OLT. Le premier réseau de transmission et le second réseau de transmission comprennent des réseaux multiplexés par répartition dans le temps et répartition en longueur d'onde, de façon à permettre un transfert d'accès à l'ONU entre des canaux de différentes longueurs d'ondes fournis par l'OLT.
PCT/CN2019/109246 2018-09-29 2019-09-29 Réseau pon, procédé et appareil pour réseau pon et système robotisé WO2020063991A1 (fr)

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PCT/CN2019/096208 WO2020063044A1 (fr) 2018-09-29 2019-07-16 Procédé de communication inter-noeuds, serveur, et client
PCT/CN2019/096217 WO2020063048A1 (fr) 2018-09-29 2019-07-16 Réseau pon et procédé de communication associé, olt, passerelle mqtt-sn, onu et serveur mqtt
PCT/CN2019/109252 WO2020063993A1 (fr) 2018-09-29 2019-09-29 Réseau pon, procédé et appareil utilisés pour un réseau pon, et système robotisé
PCT/CN2019/109247 WO2020063992A1 (fr) 2018-09-29 2019-09-29 Réseau pon, procédé et appareil pour réseau pon et système robotisé
PCT/CN2019/109256 WO2020063995A1 (fr) 2018-09-29 2019-09-29 Pon, procédé et appareil de pon, et système robotisé
PCT/CN2019/109257 WO2020063996A1 (fr) 2018-09-29 2019-09-29 Réseau pon, procédé et dispositif associés à un réseau pon, et système robotisé
PCT/CN2019/109246 WO2020063991A1 (fr) 2018-09-29 2019-09-29 Réseau pon, procédé et appareil pour réseau pon et système robotisé
PCT/CN2019/109263 WO2020063997A1 (fr) 2018-09-29 2019-09-30 Procédé de communication entre nœuds, et nœud de communication et système de communication

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PCT/CN2019/096208 WO2020063044A1 (fr) 2018-09-29 2019-07-16 Procédé de communication inter-noeuds, serveur, et client
PCT/CN2019/096217 WO2020063048A1 (fr) 2018-09-29 2019-07-16 Réseau pon et procédé de communication associé, olt, passerelle mqtt-sn, onu et serveur mqtt
PCT/CN2019/109252 WO2020063993A1 (fr) 2018-09-29 2019-09-29 Réseau pon, procédé et appareil utilisés pour un réseau pon, et système robotisé
PCT/CN2019/109247 WO2020063992A1 (fr) 2018-09-29 2019-09-29 Réseau pon, procédé et appareil pour réseau pon et système robotisé
PCT/CN2019/109256 WO2020063995A1 (fr) 2018-09-29 2019-09-29 Pon, procédé et appareil de pon, et système robotisé
PCT/CN2019/109257 WO2020063996A1 (fr) 2018-09-29 2019-09-29 Réseau pon, procédé et dispositif associés à un réseau pon, et système robotisé

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WO2020063044A1 (fr) 2020-04-02
WO2020063995A1 (fr) 2020-04-02
WO2020063993A1 (fr) 2020-04-02

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