WO2007128186A1 - Système réseau de communication de données dans un réseau optique, et procédé permettant sa mise en oeuvre - Google Patents

Système réseau de communication de données dans un réseau optique, et procédé permettant sa mise en oeuvre Download PDF

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Publication number
WO2007128186A1
WO2007128186A1 PCT/CN2007/000361 CN2007000361W WO2007128186A1 WO 2007128186 A1 WO2007128186 A1 WO 2007128186A1 CN 2007000361 W CN2007000361 W CN 2007000361W WO 2007128186 A1 WO2007128186 A1 WO 2007128186A1
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Prior art keywords
information
network
data
processing unit
data information
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PCT/CN2007/000361
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English (en)
Chinese (zh)
Inventor
Zhenyu Wang
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Zte Corporation
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Publication of WO2007128186A1 publication Critical patent/WO2007128186A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0287—Protection in WDM systems
    • H04J14/0293—Optical channel protection
    • H04J14/0295—Shared protection at the optical channel (1:1, n:m)

Definitions

  • the present invention relates to the field of optical communication technologies, and in particular, to a data communication network system in an optical network and an implementation method thereof.
  • DCN Data Communication Network
  • MCN management communication network
  • SCN Signaling Communication Network
  • the physical implementation of the data communication network of the existing WDM optical network system in the industry mainly adopts the following three methods:
  • the Optical Monitoring Channel (OSC) mode refers to the method of using the main optical out-of-band wavelength in the WDM equipment system as a physical channel for specifically transmitting network management and control signaling information;
  • the service overhead mode refers to a method of transmitting network management and control signaling information by using a service frame overhead byte of an optical signal carried by a primary optical wavelength in a WDM device system;
  • the external communication network mode of the system refers to the way of transmitting network management and control signaling information by using a communication network other than the WDM equipment system itself, for example, using an external IP network.
  • the main feature is that the transmission path of network management and control signaling information is relatively independent, and is not affected by the distribution of the specific services, and the communication protocol can also be flexibly selected;
  • the main feature is that it does not need to add a special physical transmission carrier, and it can be directly transmitted along with the service signal.
  • the main feature is to The communication network makes the data transmission completely independent of the application system itself, and is not affected by the failure of the system itself.
  • the data communication network of the existing optical network system is basically implemented by one of the above three methods, and there is no hybrid application method in which multiple modes are coexisting.
  • the present invention will provide a data communication network system for an optical network system shared by multiple modes and an implementation method thereof for the application of an optical transmission network data communication network, and utilize various application modes through various application modes. They are mutually backups to better ensure the reliability of network management and control signaling information transmission. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a data communication network system in an optical network and an implementation method thereof, which overcomes the aforementioned deficiencies of the existing data communication network implementation technology and achieves reliable reliability of network management and control signaling information transmission. Sexual purpose.
  • the present invention provides a data communication network system in an optical network, which is used to implement communication transmission between management information and control signaling information between optical network nodes, and includes two multiplexing/demultiplexing units, and the system further includes:
  • At least one optical signal transceiver unit an optical monitoring channel processing unit, an external communication network, a network management plane processing unit, a network control plane processing unit, and a data communication network information cooperative processing unit, where
  • the at least one optical signal transceiving unit is connected to one of the multiplexing/demultiplexing units for receiving and transmitting a certain optical wavelength signal in a wavelength range of the main optical band, and simultaneously, from the frame structure of the carried optical signal
  • the corresponding network management control data information is inserted and parsed in the overhead byte, and the data communication network information cooperation processing unit performs network management control data information transmission and reception;
  • the optical monitoring channel processing unit is connected to one of the multiplexing/demultiplexing units for receiving and transmitting an optical wavelength signal outside the main optical band of the optical monitoring channel, and at the same time, the overhead of the frame structure of the optical signal carried
  • the corresponding network management control data information is inserted and parsed in the byte, and the data communication network information co-processing unit performs network management and control data information transmission and reception;
  • the external communication network is a communication network other than the optical network node device, and is used for transmitting and receiving corresponding offices.
  • the network management control data information, and the data communication network information cooperation processing unit performs network management control data information transmission and reception;
  • a network management plane processing unit and a data communication network information co-processing unit performs transmission and reception of network management data information, performs reception processing and transmission processing on the management data information, and transmits and receives network management control data to the data communication network cooperative processing unit.
  • the communication mode of the information is prioritized;
  • a network control plane processing unit configured to perform transceiving and interacting with the network control data information with the data communication network information co-processing unit, and perform receiving processing and sending processing on the control data information;
  • the data communication network information cooperative processing unit supports the network management plane Setting, by the processing unit, the priority of the communication mode for transmitting and receiving the network management control data information, on the one hand, the network from the optical signal transceiver unit, the optical monitoring channel processing unit, and the external communication network
  • the management control data information is sent and received, and the communication status is monitored, and after the selection is made according to the priority setting, the network management control data information is distributed to the network management plane processing unit and the network control plane processing unit, and On the one hand, after the communication mode selection is performed according to the priority setting, the data information from the network management plane processing unit and the network control plane processing unit is distributed to the optical signal transceiver unit and the optical monitoring channel processing unit.
  • the outside Letter network by the processing unit, the priority of the communication mode for transmitting and receiving the network management control data information
  • the data communication network information cooperation processing unit includes: an optical monitoring channel information processing module, an optical signal transceiver unit overhead information processing module, an external communication network information processing module, and a data information priority control module, where
  • the optical monitoring channel information processing module is configured to monitor the sending and receiving processing and communication status of the network management control data information from the optical monitoring channel processing unit, and send the information status monitoring information and the information to the data information priority control module. Receiving data information and receiving data information distributed by the data information priority control module;
  • the optical signal transceiver unit overhead information processing module is configured to monitor the transmission and reception processing and the communication status of the network management control data information from the respective optical signal transceiver units, and send the communication status monitoring information and the received information to the data information priority control module.
  • the external communication network information processing module is configured to monitor the transmission and reception processing and the communication status of the network management control data information from the external communication network, and send the communication status monitoring information and the received data information to the data information priority control module, and receive Data information distributed by the data information priority control module;
  • the data information priority control module supports the setting of the communication mode priority of the network management control data information by the network management plane processing unit, and receives the information processing module from the optical monitoring channel, the overhead information processing module of the optical signal transceiver unit, and the external communication network information. Processing the communication status information of the module and the data information, and selecting the data according to the priority setting, and distributing the data information to the network management plane processing unit and the network control plane processing unit, and according to the priority After the communication mode is selected, the data information from the network management plane processing unit and the network control plane processing unit is distributed to the optical monitoring channel information processing module, the optical signal transceiver unit overhead information processing module, and the external Communication network information processing module.
  • the external communication network is an IP network.
  • the out-of-band optical monitoring channel mode in the optical monitoring channel processing unit adopts a time division multiplexing mode or a 10/100 M Ethernet protocol mode.
  • the data information corresponds to an overhead content of a service signal SDH frame structure.
  • the data information corresponds to an overhead content of a service signal GFP frame structure.
  • the present invention further provides a data communication network implementation method using the system of claim 1 for implementing communication of management information and control signaling information between optical network nodes, the method comprising the steps of:
  • the optical signal transceiver unit inserts and parses out corresponding network management control data information from the overhead bytes of the carried optical signal frame structure, and cooperates with the data communication network information.
  • the processing unit performs the transceiving interaction as the first communication mode;
  • the optical monitoring channel processing unit inserts and parses out corresponding network management control data information from the overhead bytes of the carried optical signal frame structure, and transmits and receives the corresponding network management control data information to the data communication network information processing unit. Interaction, as a second communication method;
  • the data communication network information cooperation processing unit monitors the communication status of the network management control data information from different communication modes in real time, and distributes the data information from the current highest priority to the network management plane processing unit and the network. Controlling the processing unit, or distributing data information from the network management plane processing unit and the network control plane processing unit in a current highest priority communication manner,
  • the communication mode is switched to the lower level, and when the communication data information from the current highest priority is found to be normal, the communication mode is switched to the highest priority. .
  • the priority order of the communication modes described in step (4) is, in descending order, the first, second, and third communication modes.
  • the data communication network information cooperation processing unit described in the step (5) includes an optical monitoring channel information processing module, an optical signal transceiver unit overhead information processing module, an external communication network information processing module, and a data information priority control module, wherein :
  • the optical monitoring channel information processing module monitors the transmission and reception processing and the communication status of the network management control data information from the optical monitoring channel processing unit, and sends the communication status monitoring information and the received data to the data information priority control module. Information and receiving data information distributed by the data information priority control module;
  • the optical signal transceiver unit overhead information processing module monitors the transmission and reception processing and the communication status of the network management control data information from the respective optical signal transceiver units, and transmits the communication status monitoring information and the received data to the data information priority control module. Information and receiving by the data letter Data information distributed by the priority control module;
  • the external communication network information processing module monitors the transmission and reception processing and the communication status of the network management control data information from the external communication network, and sends the communication status monitoring information and the received data information to the data information priority control module, and receives the information Data information distributed by the data information priority control module;
  • the data information priority control module supports the setting of the communication mode priority of the network management control data information by the network management plane processing unit, and receives the information processing module from the optical monitoring channel, the overhead information processing module of the optical signal transceiver unit, and the external communication network information. Processing the communication status information of the module and the data information, and selecting the data according to the priority setting, and distributing the data information to the network management plane processing unit and the network control plane processing unit, and according to the priority After the communication mode is selected, the data information from the network management plane processing unit and the network control plane processing unit is distributed to the optical monitoring channel information processing module, the optical signal transceiver unit overhead information processing module, and the external Communication network information processing module.
  • optical signal frame structure described in the step (1) adopts an SDH frame structure manner, a GFP frame structure manner, or an OTN frame structure defined by the ITU-T G.709 standard.
  • the optical signal carried in the step (2) is an out-of-band optical signal wavelength
  • the out-of-band optical monitoring channel mode is a TDM mode or a 10/100 M Ethernet protocol mode.
  • the external communication network described in the step (3) is an IP network.
  • the method further includes:
  • the data communication network system processing unit will wait until the communication mode of one of the communication modes is restored, and the current highest priority communication mode is selected. Perform network management to control the transmission and reception of data information.
  • FIG. 1 is a structural diagram of a data communication network system of a WDM device according to an embodiment of the present invention
  • FIG. 2 is a structural diagram of a data communication network system of a WDM device according to an embodiment of the present invention
  • FIG. 3 is a block diagram of a data communication network system of a WDM device according to an embodiment of the present invention
  • a structural diagram of a WDM equipment data communication network system
  • FIG. 4 is a structural diagram of a data communication network system of a WDM device according to still another embodiment of the present invention.
  • FIG. 5 is a structural diagram of a WDM equipment data communication network system in which a failure situation occurs according to an embodiment of the present invention.
  • the present invention proposes a data communication network system in which multiple implementation technologies coexist in an optical network and an implementation method thereof.
  • the data communication network system mainly includes the following functional parts: (1) a multiplexing/demultiplexing unit.
  • the main function of the multiplexer is to multiplex the optical wavelength signals generated by the respective signal generating devices inside the WDM node into optical multiplex section signals by wavelength division multiplexing;
  • the main function of the demultiplexer is to decompose the optical multiplex section signal input from the WDM node into multiple optical wavelength signals in reverse wavelength division multiplexing.
  • Management control data information including management information and control signaling information.
  • the wavelength used is the main optical out-of-band wavelength of the WDM device.
  • External communication network Refers to a communication network other than a WDM node device, such as an external IP data network.
  • the main function is to receive and process the management information in the DCN data of the node; support the setting of the communication mode priority of the DCN information co-processing unit.
  • the main function is to receive and send signaling control information in the DCN data of the node.
  • the main function is to provide multiple DCN data sources (including data information from optical signal transceiver unit, optical monitoring channel (OSC) processing unit and external communication network) for the system at the same time. It provides priority arbitration processing mechanism for receiving and transmitting data information. And monitor its communication status, and select the data information that needs to be received and sent from multiple data sources.
  • DCN data sources including data information from optical signal transceiver unit, optical monitoring channel (OSC) processing unit and external communication network
  • the DCN information collaborative processing unit may further be divided into the following functional processing modules:
  • an OSC information processing module for transmitting and receiving processing and communication status of network communication data information from the system OSC processing unit; transmitting communication status monitoring information and the received network to the connected "data information priority control module" Communication data information; receiving network communication data information distributed from the "data information priority control module".
  • an OTU overhead information processing module configured to implement transmission and reception processing and communication status monitoring of network communication data information from overhead bytes of each OTU processing unit of the system; and send communication status monitoring to the connected "data information priority control module" Information and received network communication data information; Received from the "data information priority control module," distributed network communication data information.
  • Data information priority control module for transmitting and receiving processing and communication status of network communication data information from the external communication network of the system; transmitting communication status monitoring information and receiving to the connected "data information priority control module" Network communication data information; receiving network communication data information distributed from the "data information priority control module”.
  • Data information priority control module the main functions include: Supporting the network management plane to set the priority of the data communication network implementation; Receiving the data information source supported by the system (OSC information processing module, OTU overhead information processing module, external communication) The data communication information of the network information processing module is selected and distributed to the network management plane processing unit and the network control plane processing unit according to the priority setting situation; the data information from the network management plane processing unit and the network control plane processing unit is distributed.
  • the OSC information processing module, the OTU overhead information processing module, and the external communication network information processing module are provided.
  • the invention provides a unified cooperative processing of data information from a plurality of DCN information transmission devices by further entering the DC information cooperation processing unit on the basis of the above-mentioned data communication network node implementation device.
  • the steps of DCN information collaborative processing mainly include:
  • the priority of the data communication network implementation of the system is set through the network management plane, for example, the priority is selected from OSC mode, service overhead mode, and external communication network mode. Otherwise follow the system's default priority order.
  • the priority order can also be other combinations.
  • the DCN information co-processing unit monitors the communication status of the DCN data information from different modes in real time, and when it is found that the communication data information received from the current highest priority is abnormal (interrupted or errored), the data is forwarded to the lower priority data communication network. Switching implementations.
  • the DCN information co-processing unit monitors the communication status of the DCN data information from different modes in real time. When the implementation of the communication data network that is higher than the current highest priority is restored, the switching to the high-priority data communication network is performed. .
  • the data communication network When the data communication network is implemented, firstly, three communication modes for transmitting and receiving data information from the optical signal transceiver unit, the optical monitoring channel processing unit, the external communication network, and the data communication network information cooperation processing unit are separately established, The data information from the optical signal transceiver unit, the optical monitoring channel processing unit, and the external communication network is received and transmitted.
  • the network management plane processing unit performs setting of three communication mode priorities for the data communication network information cooperation processing unit. Thereafter, the data communication network information cooperation processing unit monitors the three communication modes in real time. On the one hand, according to the monitoring result and the priority setting situation, the current highest priority is selected.
  • the data information of the W mode is received and distributed to the network management plane processing unit and the network control plane processing unit, wherein the management information is sent to the network management plane processing unit for receiving processing, and the control signaling information is And sent to the network control plane processing unit for receiving processing; on the other hand, the network management plane processing unit and the network control plane processing unit send data information to the data communication network information cooperation processing unit, according to the monitoring result and priority setting In the case, the current highest priority communication mode is selected, and the data information is distributed to the optical signal transceiver unit, the optical monitoring channel processing unit, and the external communication network.
  • FIG. 2 it is an application example of a data communication network and an implementation method thereof according to the present invention, which are specifically implemented for a WDM network data communication network.
  • the data encapsulation mode of the service signal carried by the WDM optical network adopts the SDH frame structure, so the service cost implementation manner of the data communication network may specifically correspond to the service signal SDH frame.
  • the overhead content of the structure, for example, the protection control signaling part in the system signaling control information may be implemented by K1/K2 bytes of the SDH multiplex section overhead.
  • the specific implementation technology of the out-of-band OSC mode can be implemented by Time Division Multiplexing (TDM).
  • TDM Time Division Multiplexing
  • the external communication network implementation adopts a mature IP network.
  • FIG. 3 it is a data communication network and an implementation method thereof according to the present invention, and another application example of a device for implementing a WDM network data communication network.
  • the data encapsulation mode of the service signal carried by the WDM optical network adopts a GFP frame structure, so the service cost implementation manner of the data communication network may specifically correspond to the service signal GFP frame structure.
  • the overhead content for example, the protection control signaling part in the system signaling control information may be implemented by using the reserved overhead byte of the GFP multiplex section overhead.
  • the specific implementation technology of the outband OSC mode can be implemented by using a 10/100M Ethernet protocol.
  • the external communication network implementation adopts a mature IP network.
  • FIG. 4 it is a data communication network and an implementation method thereof according to the present invention, and another application example of a device for implementing a WDM network data communication network.
  • the data encapsulation mode of the service signal carried by the WDM optical network adopts the OTN frame structure defined in the ITU-T G.709 standard, so the service overhead of the data communication network is realized.
  • the mode may be corresponding to the overhead content of the OTN frame structure of the service signal.
  • the protection control signaling part in the system signaling control information may be implemented by using a reserved overhead byte of the GFP multiplex section overhead.
  • the specific implementation technology of the outband OSC mode can be implemented by using TDM mode or 10/100M Ethernet protocol mode.
  • the network maintainer sets the priority of the data communication network priority selection mode of the system through the network management plane, and selects the priority from high to low in order of OSC mode, service overhead mode, and external communication network mode.
  • the system follows the system default priority order before setting;
  • the DCN information co-processing unit selects the OSC mode with the highest system priority as the effective mode of the current data communication network, as the actual received data source, but at the same time, in three ways.
  • the network association node sends data information
  • the corresponding OTU processing unit When the network system fails in position 2 in the figure (such as the internal wavelength channel connection failure of the node), the corresponding OTU processing unit will send a pre-agreed NULL message to the DCN information co-processing unit of the node. After detecting the null message, the DCN information co-processing unit can determine that the corresponding communication mode is invalid. However, since the highest priority OSC mode is still valid at this time, the system will not need to switch to receive the selected communication mode. If the fault of position 3 occurs further thereafter, it is the same as the processing of (1).
  • the corresponding OSC processing unit When the network system fails in position 3 in the figure (such as the internal OSC channel connection failure of the node), the corresponding OSC processing unit will send a pre-agreed NULL message to the DCN information co-processing unit of the node. After detecting the null message, the DCN information co-processing unit can determine that the corresponding communication mode fails, and then the system switches the effective DCN data receiving mode to the OTU overhead mode. When the location (D fault recovery, the DCN information co-processing unit will be able to receive a valid message again, then the system will switch the valid DCN data reception mode to the highest priority OSC mode.
  • the DCN information cooperation processing unit detects that the data from the external communication network cannot be received, and can determine that the corresponding communication mode is invalid. However, since the highest priority OSC mode is still valid at this time, the system will not need to switch to receive the selected communication mode. If the fault of position 2 or 3 occurs further subsequently, the processing conditions of (2) and (3) are respectively the same; if the faults of positions 2 and 3 occur further, then all data communication methods of the current node fail. The system DCN information co-processing unit will wait for the communication mode to resume until the fault is recovered, and then start to enable the current highest priority communication mode for network data communication information transmission.
  • the data communication network system and the implementation method thereof provide a data communication network system in which multiple implementation modes coexist in an optical network, and management and control signaling communication are realized in priority order.
  • the advantages of each mode are fully utilized, and at the same time, multiple modes are mutually backed up, which better ensures the reliability of network management and control signaling information transmission.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention a trait à un système réseau de communication de données dans un réseau optique et à un procédé permettant sa mise en oeuvre. Le recours à une unité de co-traitement d'informations de réseau de communication de données, au traitement d'émission-réception et à un mode de communication des informations de données issues de l'unité de traitement d'émission-réception de signaux optiques, permet de contrôler en temps réel l'unité de traitement de canal à moniteur optique et le réseau de communication externe. L'on sélectionne le mode de communication possédant le niveau de priorité le plus élevé pour effectuer le traitement d'émission-réception des informations de données conformément au paramètre de niveau de priorité prédéterminé et aux informations du de contrôle. Lorsque le mode de communication possédant le niveau de priorité le plus élevé est victime d'une défaillance, il passe à un niveau de priorité plus bas. Lorsque la défaillance est éliminée, il repasse au niveau de priorité le plus élevé pour réaliser le traitement d'émission-réception des informations de données. Le système et le procédé associé permettent d'assurer efficacement la fiabilité des informations de données.
PCT/CN2007/000361 2006-05-09 2007-02-02 Système réseau de communication de données dans un réseau optique, et procédé permettant sa mise en oeuvre WO2007128186A1 (fr)

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CNB2006100757977A CN100518035C (zh) 2006-05-09 2006-05-09 一种光网络中的数据通信网系统及其实现方法
CN200610075797.7 2006-05-09

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