WO2007128186A1 - A data communication network system in optical network and realizing method thereof - Google Patents

Abstract

A data communication network system in optical network and realizing method thereof are provided. By using introducing a data communication network information coprocessing unit, the receive-transmit processing and communication mode of the data information from the optical signal receive-transmit processing unit, the optical monitor channel processing unit and the external communication network are monitored in real time, the communication mode that has the highest priority level is selected to perform receive-transmit processing of the data information according to the predetermined priority level setting and the monitor information, while the communication mode that has the highest priority level occurs a failure, which switches to lower priority level communication mode, after the failure is removed, which resumes to adopt the communication mode that has the highest priority level to perform receive-transmit processing of the data information. The system and realizing method thereof can ensure effectually the reliability of the data information.

Description

 Data communication network system in optical network 'network and implementation method thereof

Field of practice

 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.

Background technique

 In an optical transmission network using Wavelength Division Multiplexing (WDM) technology, there is a Data Communication Network (DCN). The role of the data communication network (DCN) in the optical transport network is mainly used to realize the communication transmission of management information between network nodes and the communication of control signaling information, which can be further divided into a management communication network (MCN) and Signaling Communication Network (SCN).

 At present, the physical implementation of the data communication network of the existing WDM optical network system in the industry mainly adopts the following three methods:

 (1) 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;

 (2) 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;

 (3) 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 implementation of the above three data communication networks has its own characteristics, namely:

 (a) For the monitoring channel mode, 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;

 (b) For the service overhead mode, 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.

(c) For the external communication network mode of the system, 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.

 However, 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. In view of this, 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.

 Further, 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. Data information and receiving data information distributed by 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.

 Further, the external communication network is an IP network.

 Further, 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.

 Further, if the data encapsulation mode of the service signal carried by the optical network adopts an SDH frame structure manner, the data information corresponds to an overhead content of a service signal SDH frame structure.

 Further, if the data encapsulation mode of the service signal carried by the optical network adopts a GFP frame structure, the data information corresponds to an overhead content of a service signal GFP frame structure.

 Further, if the data encapsulation mode of the service signal carried by the optical network is adopted

The manner of the OTN frame structure specified by the ITU-T G.709 standard, the data information corresponding to the overhead content of the service signal OTN 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:

(1) 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;

 (2) 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;

 (3) transmitting and receiving the network management control data information by the external communication network, and transmitting and receiving the data to the data communication network information cooperation processing unit as the third communication mode;

 (4) setting, by the network management plane processing unit, a priority order of the first, second, and third communication modes in the data communication network information cooperation processing unit;

 (5) 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,

 When it is found that the communication data information from the current highest priority is abnormally transmitted and received, 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. .

 Further, the priority order of the communication modes described in step (4) is, in descending order, the first, second, and third communication modes.

 Further, 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.

 Further, the 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.

 Further, the optical signal carried in the step (2) is an out-of-band optical signal wavelength, and the out-of-band optical monitoring channel mode is a TDM mode or a 10/100 M Ethernet protocol mode.

 Further, the external communication network described in the step (3) is an IP network.

 Further, the method further includes:

 (6) if all three communication modes in the data communication network fail, 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.

Applying the data communication network system and the implementation method thereof according to the present invention, a data communication network system in which multi-god implementation modes coexist and the management and control signaling communication are implemented according to the priority order is established, and various methods are fully utilized. The advantages, at the same time, multiple modes of backup between each other, better ensure the reliability of network management and control signaling information transmission. BRIEF abstract

 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;

 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.

Preferred embodiment of the invention

 In order to overcome the above-mentioned deficiencies of the existing data communication network implementation technologies, 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, as shown in FIG. 1, mainly includes the following functional parts: (1) a multiplexing/demultiplexing unit.

 It is mainly a multiplexer/demultiplexer in a WDM node, where:

 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.

 (2) Optical Signal Transceiver Unit (OTU).

 It is configured to receive and transmit a certain optical wavelength signal in a wavelength range of the WDM device, and can insert and parse corresponding DCN data information in an overhead byte of the carried optical signal frame structure, where the data information is a network. Management control data information, including management information and control signaling information.

 (3) Optical Monitoring Channel (OSC) processing unit.

It is mainly used to receive and transmit the wavelength signal of the optical monitoring channel of WDM equipment, and at the same time The corresponding DCN data information is inserted and parsed in the overhead of the optical signal frame structure. The wavelength used is the main optical out-of-band wavelength of the WDM device.

 (4) External communication network. Refers to a communication network other than a WDM node device, such as an external IP data network.

 (5) Network management plane processing unit. 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.

 (6) Network control plane processing unit. The main function is to receive and send signaling control information in the DCN data of the node.

 (7) DCN information collaborative processing unit.

 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.

 The DCN information collaborative processing unit, as shown in FIG. 1, may further be divided into the following functional processing modules:

 a) 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".

 b) 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.

c) an external communication network information processing 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". d) 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:

 First, 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. .

 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.

Then, 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.

 Specific technical embodiments of the present invention are described in detail below by means of further detailed embodiments of the present invention.

 Example 1

 As shown in 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.

 In the system device shown in FIG. 2, for some WDM optical networks, 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). The external communication network implementation adopts a mature IP network.

Example 2:

 As shown in 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.

In the system implementation device of FIG. 3, for some WDM optical networks, 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. Example 3:

 As shown in 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.

 In the system implementation device of FIG. 4, for some WDM optical networks, 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. For example, 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. Implementation of external communication network Adopt a mature IP network.

Example 4:

 As shown in FIG. 5, in the present embodiment, when a failure of the communication network occurs in the system, the specific implementation process of the DC^[Information Collaborative Processing Unit will be described in detail. First, 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;

 When there is no data communication network failure in the system, 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;

(1) When the network system fails in position 1 in Figure 5 (such as a line break, etc.), it is equivalent to all wavelength channels (including 2) due to the simultaneous failure of all wavelength channel inputs and OSC wavelength channel input on the right side of the node. 3 position) At the same time, the corresponding OTU and OSC processing unit of each channel will send a pre-agreed NULL message to the DCN information co-processing unit of the node. When the DCN information co-processing unit detects the null message, it can determine The corresponding communication method is invalid, and then the system switches the effective DCN data receiving mode to external communication. Web mode. After the fault is repaired, the DCN information co-processing unit will be able to receive the valid message again, and then the system will switch the effective DCN data receiving mode to the highest priority OSC mode.

 (2) 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).

 (3) 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.

 (4) When the network system fails in the position 4 in the figure (such as an external communication network failure, etc.), 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. Industrial Applicability 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.

Claims

Claim  A data communication network system in an optical network, configured to implement communication transmission between management information and control signaling information between optical network nodes, comprising two multiplexing/demultiplexing units, wherein 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 the transmission and reception interaction of the network alarm control data information;  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, configured to send and receive corresponding network management control data information, and the data communication network information cooperation processing unit performs network management and control data information transmission and reception;  The network management plane processing unit performs data transmission and reception interaction with the data communication network information processing unit, performs reception processing and transmission processing on the management data information, and transmits and receives network management control data information to the data communication network cooperative processing unit. The communication mode priority is set; 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 Management control data information transmission and processing and communication status monitoring, and set according to priority After the selection is made, 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 other hand, after the communication mode selection is performed according to the priority setting situation, the Data information of the network management plane processing unit and the network control plane processing unit is distributed to the optical signal transceiver unit, the optical monitoring channel processing unit, and the external communication network.  2. The data communication network system according to claim 1, wherein the data communication network information cooperation processing unit comprises an optical monitoring channel information processing module, an optical signal transceiver unit overhead information processing module, and an external communication network information processing module. a data information priority control module, wherein the optical monitoring channel information processing module is configured to monitor, send and receive processing and communication status of network management control data information from the optical monitoring channel processing unit, and prioritize the data information The control module sends the communication status monitoring information and the received data information, and receives the 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. Data information and receiving data information distributed by 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. After the communication status information of the information processing module and the data information are selected according to the priority setting, the data information is distributed to the network management plane processing unit and the network control plane processing unit, and at the same time, 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, External communication network information processing module. 3. The data communication network system according to claim 1, wherein said external communication The network is an IP network.  4. The data communication network system according to claim 1, wherein: the out-of-band optical monitoring channel mode in the optical monitoring channel processing unit is a time division multiplexing mode or a 10/100M Ethernet protocol. the way.  The data communication network system according to claim 1, wherein if the data encapsulation mode of the service signal carried by the optical network adopts an SDH frame structure, the data information corresponds to a service signal SDH frame structure. The overhead content.  The data communication network system according to claim 1, wherein if the data encapsulation mode of the service signal carried by the optical network adopts a GFP frame structure, the data information corresponds to a service signal GFP frame structure. The overhead content.  The data communication network system according to claim 1, wherein if the data encapsulation mode of the service signal carried by the optical network adopts an OTN frame structure defined by the ITU-T G.709 standard, The data information corresponds to the overhead content of the service signal OTN frame structure.  8. A data communication network implementation method for utilizing the system of claim 1 for implementing communication of management information and control signaling information between optical network nodes, wherein the method comprises the following steps:  (1) 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 performs transceiving and interacting with the data communication network information cooperation processing unit. , as the first means of communication;  (2) 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 the second communication method;  (3) transmitting and receiving the network management control data information by the external communication network, and transmitting and receiving the data to the data communication network information cooperation processing unit as the third communication mode;  (4) setting, by the network management plane processing unit, a priority order of the first, second, and third communication modes in the data communication network information cooperation processing unit; (5) 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 takes the data information from the current highest priority. Distributing to the network management plane processing unit and the network control plane 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,  When it is found that the communication data information from the current highest priority is abnormally transmitted and received, the communication mode is switched to the lower level, and when the communication data information from the current highest priority is found to be restored to normal, the communication mode is switched to the highest priority. .  The method according to claim 8, wherein the priority order of the communication mode in step (4) is the first, second, and third communication modes from high to low.  The method according to claim 8, wherein the data communication network information cooperation processing unit in the step (5) comprises an optical monitoring channel information processing module, an optical signal transceiver unit overhead information processing module, and an external communication network. An information processing module and a data information priority control module, wherein: the optical monitoring channel information processing module monitors, processes, and communicates network management control data information from the optical monitoring channel processing unit to the data information The priority control module sends the communication status monitoring information and the received data information, and receives the 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 data information distributed by the data information 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 The information is distributed to the network management plane processing unit and the network control plane processing unit, and at the same time, after the communication mode is selected according to the priority setting, the network management plane processing unit and the network control plane processing unit are The data information 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 method according to claim 8, wherein the optical signal frame structure in the step (1) is in the form of an SDH frame structure, or a GFP frame structure, or an ITU-T G.709 standard. The manner in which the OTN frame structure is specified.  12. The method according to claim 8, wherein the optical signal carried in step (2) is an out-of-band optical signal wavelength, and the out-of-band optical monitoring channel mode is TDM mode or 10 Λ Μ Ethernet. Agreement method.  13. The method according to claim 8, wherein the external communication network described in the step (3) is an IP network.  The method of claim 8, wherein the method further comprises: (6) if all three communication modes in the data communication network fail, 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.