CN101964958A - On-board network system and backbone node message processing method thereof - Google Patents

Abstract

The invention discloses an airborne network system and a backbone node message processing method thereof. The system adopts a hybrid layered network structure combining a wireless Mesh backbone network and a heterogeneous access network. The interconnection of various access networks is realized through the airborne backbone network, which improves the flexibility and scalability of the system. At the same time, the backbone node message processing method is adopted in the integrated message processing system of the backbone network nodes. This method realizes the conversion of heterogeneous messages between the core network and the edge network, and adopts the information distribution service based on the publish/subscribe mechanism, which improves the resource utilization rate and information access efficiency in the complex network environment. The invention has dual-use value for military and civilian use, and has broad application prospects in the fields of air command coordination constellation of military integrated information grid and civil aviation networked communication, navigation, monitoring and the like.

Description

Airborne Network System and Its Backbone Node Message Processing Method

technical field

The invention belongs to the field of wireless communication, and in particular relates to an airborne network system and a backbone node message processing method thereof.

Background technique

Airborne Network (AN) is a wireless communication network that uses aircraft as nodes and is interconnected by wireless data links to transmit packet messages and IP services. Especially in the integrated information grid system, AN is an air tactical information network with the integrated avionics system as the main node. Changes in the situation dynamically form a matching topology, providing real-time, reliable, and flexible information sharing for air system confrontation. At the same time, AN can be used as the air relay system of the regional communication network, which can not only overcome the influence of the terrain, expand the communication range, but also have shorter delay and more flexible deployment compared with satellite communication. In addition, the system can form an integrated information grid with the space-based information network and the land/sea-based information network to realize the seamless interconnection of various heterogeneous tactical systems of land, sea, air and space.

The topology of the airborne network system has developed from the initial point-to-point link to a full mesh structure based on time-division multiple access. Although the network scale has been expanded, the channel utilization rate and network throughput are low, and the flexibility and reliability are insufficient, making it unable to meet the needs of air command and coordination constellations under the conditions of network-centric warfare. In order to further enhance the flexibility, real-time performance and reliability of information sharing between aviation platforms, the airborne network system is constantly developing towards a network structure based on general protocols, and is gradually integrated into the integrated information grid system.

In the air channel, the airborne network system is mainly based on line-of-sight communication, and realizes large-scale distributed networking through node forwarding. Due to the strong mobility of the aviation platform, the topology of the airborne network also changes dynamically, and constitutes a hybrid layered network consisting of a wireless Mesh (wireless mesh network) backbone network and a variety of heterogeneous access networks. wireless network. Among various types of access networks, Mobile Ad hoc Network (MANET) is a self-organizing distributed network that can be rapidly deployed and forwarded by wireless mobile nodes through multiple hops. It does not require fixed node support, realizes distributed non-central management, can be temporarily organized and quickly deployed, and has high mobility and invulnerability, including the following salient features:

(1) Fully distributed. Ad hoc networks are entirely composed of wireless nodes without any fixed infrastructure. network operation. Organization and management are fully distributed and self-organizing.

(2) Dynamic topology. Nodes can move freely, and the network topology may change unpredictably at any moment.

(3) Multi-hop forwarding. The wireless communication distance is limited. When the destination node exceeds the communication range of the source node, an intermediate node is required to perform relay forwarding.

(4) Bandwidth is limited and variable. The bandwidth of the wireless link is limited, and the capacity of the wireless link is easy to change with the movement of nodes and different channel environments.

Wireless Mesh Network (WMN) is a broadband wireless network based on Internet Protocol (IP, Internet Protocol) and composed of multi-hop routing of wireless access points (AP, Access Point) distributed in a mesh. WMN mainly includes three types of network nodes with different functions: users, Mesh routers (that is, wireless access points) and gateways. User nodes are connected to each other through different types of subnetworks (such as Ad hoc networks, etc.), and provide end-to-end communication services in a local area; Mesh routers are a type of low-mobility routers that can achieve long-distance broadband wireless communication between each other. Connected nodes, Mesh routers use multi-hop forwarding to achieve larger coverage with limited power, thereby forming a wireless Mesh backbone network among a large number of widely distributed user nodes; gateway nodes are usually Mesh routers that can connect high The access node of the primary network. Although both WMN and MANET adopt multi-hop networking, WMN involves a wider network type, and its essence is a network architecture; MANET is essentially only one of many types of WMN access subnets. The WMN with hybrid structure has become an ideal wireless network access method in the future, and can realize the interconnection and intercommunication of various heterogeneous subnets under the same network architecture.

Due to the constraints of platform load and channel environment, the airborne network system has been unable to meet the rapidly increasing bandwidth requirements of various services. Since the general communication network does not have the ability to identify user awareness and lacks the control and scheduling of transmission information, the quality of communication services is significantly reduced, making it difficult to distribute time-sensitive survivability information in a timely manner. The information distribution service IDS (Information Distribution Service) is a set of end-to-end information cognition, access and push service mechanisms established under the guidance of certain strategies, which can not only realize the on-demand allocation of communication resources, but also greatly improve resource utilization. rate and information transmission efficiency. IDS needs to map the user's distribution strategy to the transmission control strategy that the communication system can understand, and allocate network resources in the most reasonable way, so as to meet the communication quality requirements of different users. In order to improve the efficiency of information access in a massive information environment, IDS must include important technical means such as information description, automatic query, and active push.

Contents of the invention

The purpose of the present invention is to provide an airborne network system and a backbone node message processing method thereof in order to solve the system structure design problem of the air command coordination constellation under the integrated information grid system. In the air command coordination constellation, a hybrid layered network structure combining a wireless Mesh backbone network and a heterogeneous access network is used to realize the interconnection of various heterogeneous subnets through the backbone network, which enhances the network flexibility and reliability of the airborne network. At the same time, heterogeneous message conversion and information distribution services are realized in the backbone nodes of the airborne network system, which improves the resource utilization and information access efficiency of the airborne network system.

An airborne network system, the system has a hybrid Mesh layered network structure, which can be specifically divided into a core network and an edge network;

The core network includes grid nodes and backbone nodes. Grid nodes and backbone nodes form a wireless Mesh backbone network through self-organizing and distributed networking modes;

The edge network includes local nodes, access nodes, and network nodes. Local nodes, access nodes, and network nodes are respectively connected to grid nodes or backbone nodes through three heterogeneous links: local links, network access, and tactical subnets. Access to the core network;

In the hierarchical network structure, grid nodes and backbone nodes directly exchange high-speed information in the core network; among local nodes, access nodes and network nodes, similar nodes in the same area can only communicate with each other in the same edge network. Nodes in different regions or different types must access the core network through grid nodes or backbone nodes to realize information exchange;

The grid nodes and backbone nodes are equipped with information sensors and integrated message processing system. The information sensor is used as the information source of the integrated message processing system; the integrated message processing system is used as the gateway of the airborne network system. All kinds of information are formatted, and the publishing and subscription of messages is realized through the data distribution service.

A message processing method for publishing information by a backbone node of an airborne network system, comprising the following steps:

Step 1: Obtain information from sources.

The integrated message processing system obtains source information from information sensors, mainly including data, text messages, and multimedia information such as voice, image, and video;

Step 2: Encapsulate and package the information based on the common protocol.

The integrated message processing system sends the source information into the message conversion unit of the memory and packs it according to the common protocol.

Step 3: Generate metadata associated with the information.

The ontology combination engine generates corresponding metadata according to the characteristics of the source information, and saves it as a metadata record in a mass storage unit. The ontology combination engine classifies the metadata records according to the ontology structure of the unified battlefield information domain, so that similar information is grouped into one category and related to each other. The ontology combination engine filters out information that cannot be classified.

Step 4: Store the encapsulation package and metadata records.

According to the ontology structure, the packaging package and related metadata records are stored in a mass storage unit. A mass storage unit includes several federated databases, each of which stores a portion of information. The federated database has a web service entry, which other nodes can directly access.

Step 5: Publish information.

Service-oriented infrastructure components publish information for other remote nodes to subscribe to. All metadata records in the mass storage unit form a directory, so that remote nodes can retrieve the directory through service-oriented basic components. If a remote node subscribes to a certain type of information through registration, once the information is generated within the validity period, the service-oriented basic component will immediately and automatically send the corresponding package and its metadata records in the mass storage unit to the subscription node.

A message processing method for subscribing information of a backbone node of an airborne network system, comprising the following steps:

Step 1: Generate metadata.

Subscribing nodes generate metadata records corresponding to the required information according to their own needs and according to the ontology structure of the battlefield information domain.

Step 2: Information retrieval.

The subscribing nodes respectively perform keyword retrieval on all metadata records in the mass storage units of several remote nodes.

Step 3: Check whether the search result is empty.

The subscribing node judges whether to obtain the required information immediately according to all the returned retrieval results. If the retrieval result is not empty, it indicates that the required information is found and obtained immediately, the message processing flow ends and the end-to-end link establishment process is transferred. If the retrieval result is empty, it indicates that the required information has not been found, and the message processing flow needs to be further executed.

Step 4: Whether to modify metadata.

If the search result in step 3 is empty, ask the user whether to modify the currently generated metadata record. An empty retrieval result may be caused by the ontology structure mismatch between the publishing and subscribing parties or the inconsistency between the metadata record and the required information. To modify metadata, repeat steps 1 to 3. If the metadata record remains unchanged, then continue to execute the message processing flow.

Step 5: Subscribe to information.

When the battlefield information domain ontology structures of the information publishing and subscribing parties completely match and the metadata records are completely consistent with the required information, the information retrieval result is empty, indicating that the information cannot be obtained from the airborne network system. At this point, the subscribing node registers with all relevant publishing nodes. Once the information is generated within the validity period, the publishing node will automatically send the corresponding package and its metadata records to the subscribing node.

The advantages of the present invention are:

(1) The system and method described in the present invention are suitable for constructing an airborne network that can seamlessly access the integrated information grid;

(2) The system and method described in the present invention are suitable for constructing an air command coordination constellation with various types of aviation aircraft as nodes;

(3) The system and method of the present invention encapsulates local messages by using a general protocol and realizes the integration of heterogeneous networks through information distribution services, which not only realizes flexible and efficient information access in complex heterogeneous networks, but also greatly reduces It eliminates the transformation of existing communication equipment, saves costs and improves efficiency.

Description of drawings

Fig. 1 is a topological diagram of an airborne network system in the present invention;

Fig. 2 is a schematic diagram of the airborne network system in the present invention;

Fig. 3 is the functional block diagram of integrated message processing system among the present invention;

Fig. 4a is a flow chart of the message processing method of the information release node in the present invention;

Fig. 4b is a flow chart of the message processing method of the information subscription node in the present invention.

In the picture:

1-Grid node 2-Backbone node 3-Network node 4-Access node

5-local node 6-sea/land-based platform 7-space-based platform 8-core network

9-Tactical Subnet 10-Network Access 11-Local Link 12-Information Grid

13-Comprehensive message processing system 14-Information sensor 15-Memory 16-Message conversion unit

17-Mass storage unit 18-Packaging package 19-Metadata record 20-Ontology combination engine

21-Message middleware 22-Information distribution module 23-Service component 24-Processor

Detailed ways

The present invention will be further described below in conjunction with accompanying drawings and examples.

The airborne network system described in the present invention has a hybrid Mesh layered network structure. As shown in FIG. 1 , the system can be divided into a core network 8 and several edge networks.

The core network 8 includes grid nodes 1 (advanced backbone nodes) and backbone nodes 2 . Grid node 1 is mainly based on the aviation command and communication platform, mainly including battlefield management and command control aircraft and high-altitude long-endurance drones. Backbone node 2 is mainly based on aviation support and support platforms, mainly including intelligence and reconnaissance aircraft and early warning and detection aircraft. All grid nodes 1 and backbone nodes 2 form a core network 8 (ie, a backbone network) through self-organizing and distributed networking modes.

And means to include at the same time, or means to be one of them. If it is said that "mainly includes battlefield management and command and control aircraft and high-altitude long-endurance drones, etc.", it means that it also includes battlefield management and command and control aircraft and high-altitude commander Endurance UAV, if you say "mainly for battlefield management and command and control aircraft or high-altitude long-endurance UAV, etc.", it means one of them, please read it to determine whether to use it or use it.

In the edge network, there are mainly three types of nodes: network nodes 3 , access nodes 4 and local nodes 5 . Network node 3 mainly focuses on high-performance aviation combat platforms, mainly including new-generation human/unmanned combat aircraft. Access node 4 is mainly based on aviation weapon platforms, mainly including cruise missiles, air-to-air/air-to-ground weapons and small UAVs. The local node 5 includes all aeronautical vehicles that can only communicate via the local link. Local links usually use non-IP protocols, and different types of links have different communication protocols and message formats. Network node 3, access node 4, and local node 5 respectively form a heterogeneous edge network through three links: tactical subnet 9, network access 10, and local link 11, and finally through grid node 1, backbone node 2 Access to the core network 8.

In the airborne network system, grid nodes 1 and backbone nodes 2 are connected through core network 8, while local nodes 5, access nodes 4 and network nodes 3 are connected to each other through corresponding edge networks. Since the edge network is a wireless local area network composed of nodes of the same type (network node 3 or access node 4 or local node 5) and covering different airspaces, different airspaces and different types of edge networks cannot communicate directly. The information exchange can only be completed by accessing the core network 8 through the grid node 1 or the backbone node 2 . Grid node 1 and backbone node 2 should have gateway and routing functions, and be able to interconnect with the edge network in the airspace where they are located, so as to realize the information distribution of heterogeneous messages between different airspaces and different types of edge networks. In addition to having all the functions of the backbone node 2, the grid node 1 also forms an information grid network 12 integrating land, sea, air, and space with the space-based platform 7 and the sea/land-based platform 6, thus forming a battlefield space The information exchange infrastructure between various sensors, command platforms and weapon units within the aircraft.

Fig. 2 is a kind of typical application environment of airborne network system described in the present invention, grid node 1 and backbone node 2 in the airborne network system are equipped with a plurality of information sensors 14, are used to connect core network 8 and different types edge network. Information sensors 14 include but are not limited to: radar system, electronic reconnaissance system, infrared detection system, shortwave adaptive communication system, ultrashort wave anti-jamming communication system, data link system, satellite communication system, airborne network system, etc. In order to realize information distribution between heterogeneous access networks, the grid node 1, the backbone node 2, the space-based platform 7, and the sea/land-based platform 6 are equipped with an integrated message processing system 13, and the integrated message processing system 13 serves as an airborne network system gateway to complete the functions of information encapsulation, storage and distribution. The integrated message processing system 13 formats and encapsulates various types of information in the edge network according to common protocols, and realizes information storage/retrieval and publishing/subscribing functions. For example, the comprehensive message processing system 13 uses XML (Extensible Markup Language) to encapsulate text and data information into message packets; uses protocols such as VOIP (Voice over Internet Protocol), MPEG (Moving Pictures Experts Group), and DVB (Digital Video Broadcasting) Encapsulate voice, image, and video information into multimedia packets, so as to publish to other nodes in the core network 8 through the IP protocol.

The functional block diagram of the comprehensive message processing system 13 in the backbone node in the airborne network system of the present invention is shown in FIG. 3 . Integrated message processing system 13 includes processor 24 and memory 15 , processor 24 executes all program instructions in memory 15 . The program instructions in the memory 15 can be further divided into a message conversion unit 16 , a mass storage unit 17 , an ontology combination engine 20 , a message middleware 21 and a service component 23 according to different functions. These functional units are interconnected via a memory internal bus 25 . The message conversion unit 16 receives the source information generated by the information sensor, and encapsulates it according to the common protocol. At the same time, the message conversion unit 16 extracts the encapsulated original information from the received message packet or multimedia packet and converts it into a non-IP message using a corresponding local protocol, so that it can be transmitted in the edge network. For example, the message conversion unit 16 first extracts the original information of the message packet or multimedia packet in the airborne network system, and then converts it into a data link message according to the protocol format of the tactical information distribution system (JTIDS), so that it can transmission in the network. The encapsulation package 18 (message package or multimedia package) generated by the message conversion unit 16 is stored in the mass storage unit 17, and each encapsulation package 18 is associated with a metadata record 19, and the metadata record 19 is generated by the ontology combination engine 20 A complete information summary generated according to the ontology structure of the battlefield information domain. An ontology structure is a formal and exhaustive specification of a set of shared concepts within a domain. It provides a shared vocabulary that can be used to describe the domain. For example, assuming that the encapsulation package 18 includes some information of a certain target, then the ontology combination engine 20 will describe some characteristics of the target according to the unified battlefield information domain ontology structure, and generate a metadata record 19 related to the encapsulation package 18. couplet. In addition, the metadata record 19 also includes an information security identifier, so as to ensure that network users of different levels have different access rights to the package 18 . The ontology combination engine 20 will filter the received encapsulation package 18 according to the ontology structure. For example, if the target feature information contained in a package 18 exceeds the scope defined by the ontology structure, the ontology combination engine will consider the package 18 as useless information and delete it from the mass storage unit 17 . The message middleware 21 provides an asynchronous information sharing service for the grid node 1 and the backbone node 2 of the airborne network system by using an M2M (Machine-to-Machine, machine-to-machine) transmission mechanism. The information distribution service IDS (Information Distribution Service) provided by the information distribution module 22 in the message middleware 21 will establish an end-to-end communication connection between different backbone nodes in the core network 8. The service component 23 provides remote nodes with a web service entry of local information resources through a publish/subscribe mechanism, and periodically discovers remote nodes and their information resources.

The backbone node message processing method described in the present invention includes a message processing method of an information publishing node and a message processing method of an information subscribing node. In order to enable all backbone nodes in the core network 8 to discover, access and utilize each other's information resources, the message processing method of the backbone nodes adopts a publish/subscribe mechanism. As shown in Figure 4a, the flow of the message processing method for the backbone node to publish information is as follows:

Step 1: Obtain information from sources;

The integrated message processing system 13 acquires source information from the airborne information sensor 14, including data, text messages, and multimedia information such as voice, image, and video.

Step 2: Encapsulate and package the information based on the general protocol;

The integrated message processing system 13 sends the source information to the message conversion unit 16 of the memory 15 and encapsulates and packs it according to the common protocol. If the source information comes from the core network, it will be forwarded directly in the core network according to the destination node address or extract the original information and convert it into a local message and send it in the edge network. ; If the source information comes from the edge network, the message conversion unit 16 first extracts the original information from the local message, and then encapsulates it according to the general protocol. Specifically, the integrated message processing system 13 will use XML to encapsulate text and data information into message packets on the basis of IP protocol, and use VOIP, MPEG, and DVB protocols to encapsulate voice, image, and video information into multimedia packets.

Step 3: Generate metadata associated with the information;

The ontology combination engine 20 generates corresponding metadata (keywords) according to the characteristics of the source information, and stores them as metadata records 19 in the mass storage unit 17 . The ontology combination engine 20 will classify the metadata records 19 according to the unified battlefield information domain ontology structure, so that similar information can be grouped into one category and related to each other. The ontology combination engine 20 is only responsible for maintaining the information within the scope of the ontology structure in the mass storage unit 17, and filtering out information that cannot be classified.

Step 4: Store the packaging package and metadata records;

According to the ontology structure, the encapsulation package 18 and the corresponding metadata record 19 are stored in the mass storage unit 17 . Usually, the mass storage unit 17 is composed of several federated databases, each of which stores part of the above-mentioned information. The federated database has a web service entry and can be directly accessed by other remote nodes.

Step 5: Publish information;

The service component 23 publishes information for other remote nodes to subscribe to. Usually, all the metadata records 19 in the mass storage unit 17 will form a directory, so that remote nodes can retrieve the directory through the service component 23 . If a remote node subscribes to a certain type of information through registration, once the information is generated within the validity period, the service component 23 will automatically send the corresponding package 18 and metadata record 19 in the mass storage unit 17 to the subscribing node.

As shown in Figure 4b, the flow of the message processing method of the backbone node subscription information is as follows:

Step 1: generate metadata;

Subscribing nodes generate metadata corresponding to the required information according to their own needs and according to the ontology structure of the battlefield information domain.

Step 2: information retrieval;

The subscribing node searches the metadata catalogs in the mass storage units 17 of all remote nodes by keywords.

Step 3: Determine whether the retrieval result is empty;

The subscribing node judges whether the required information can be obtained according to the returned retrieval results. If the retrieval result is not empty, it indicates that the required information is found, and the message processing flow automatically ends and transfers to the end-to-end link establishment process. If the search result is empty, it means that the required information is not found, and the message processing flow needs to be further executed.

Step 4: Whether to modify metadata.

If the search result in step 3 is empty, ask the user whether to modify the currently generated metadata. The retrieval result is empty, which may be caused by the ontology structure mismatch between the publishing and subscribing parties, or the inconsistency between the metadata and the required information. To modify metadata, repeat steps 1 to 3. If the metadata remains unchanged, the message processing flow is continued.

Step 5: Subscribe to information.

When the ontology structure of the battlefield information domain of the publishing and subscribing parties completely matches and the metadata is consistent with the required information, the information retrieval result is empty, indicating that the information cannot be obtained from the airborne network system. At this point, the subscribing node needs to register with the remote publishing node. Once the information is generated within the valid period, the publishing node will automatically send the corresponding package 18 and its metadata record 19 to the subscribing node.

The airborne network system and its backbone node message processing method proposed by the invention are suitable for building an air command and coordination constellation composed of various aviation platforms in an integrated information grid system. Using a hybrid Mesh layered network structure, different types of edge networks are fused into a large-scale, distributed airborne network based on a common protocol through the wireless Mesh backbone network, and heterogeneous access is realized through the comprehensive message processing system of the backbone nodes information sharing between networks; the message processing method of backbone nodes adopts the publish/subscribe mechanism, which realizes flexible and efficient access to information resources in large-scale and heterogeneous networks, and provides corresponding service quality assurance; the system and method It can greatly reduce the transformation of the existing airborne communication system in the construction of the information grid system, thereby saving costs and improving efficiency. In addition, the system and method are also applicable to the field of traffic management in civil aviation, and are used for sharing flight and safety information between aircrafts to realize networked communication, navigation and monitoring.

Claims (10)

1. An airborne network system, characterized in that the system has a mixed Mesh layered network structure, which can be specifically divided into a core network and an edge network; The core network includes grid nodes and backbone nodes. Grid nodes and backbone nodes form a wireless Mesh backbone network through self-organizing and distributed networking modes; The edge network includes local nodes, access nodes, and network nodes. Local nodes, access nodes, and network nodes are respectively connected to grid nodes or backbone nodes through three heterogeneous links: local links, network access, and tactical subnets. Access to the core network; In the hierarchical network structure, grid nodes and backbone nodes directly exchange high-speed information in the core network; among local nodes, access nodes and network nodes, similar nodes in the same area can only communicate with each other in the same edge network. Nodes in different regions or different types must access the core network through grid nodes or backbone nodes to realize information exchange; The grid nodes and backbone nodes are equipped with information sensors and integrated message processing system. The information sensor is used as the information source of the integrated message processing system; the integrated message processing system is used as the gateway of the airborne network system. All kinds of information are formatted, and the publishing and subscription of messages is realized through the data distribution service. 2. A kind of airborne network system according to claim 1, characterized in that grid nodes and backbone nodes have gateway and routing functions, and can be interconnected with local edge networks, between different airspaces and different types of edge networks Realize information distribution of heterogeneous messages. 3. An airborne network system according to claim 1, wherein the grid node also forms an integrated space-ground information grid with the space-based platform and the sea/land-based platform. 4. A kind of airborne network system according to claim 1, characterized in that, the backbone node is an aviation support platform, the grid node is an aviation command and communication platform, the access node is a high-mobility aviation weapon platform, and the network node is High-performance aviation combat platform, local nodes include all aviation platforms that can only communicate through local links, information sensors include radar systems, electronic reconnaissance systems, infrared detection systems, short-wave adaptive communication systems, ultrashort-wave anti-jamming communication systems, data link system, satellite communication system and airborne network system, etc. 5. A kind of airborne network system according to claim 4, characterized in that, backbone nodes include intelligence reconnaissance aircraft and early warning and detection aircraft; grid nodes include battlefield management and command aircraft and high-altitude long-endurance unmanned aerial vehicles; network Nodes include a new generation of manned/unmanned fighters; access nodes include cruise missiles, air-to-air/air-to-ground weapons, and tactical drones; local nodes include all aviation vehicles that can only communicate through non-IP protocols. 6. A kind of airborne network system according to claim 1, characterized in that, the integrated message processing system is configured as a gateway of the airborne network system in grid nodes, backbone nodes, space-based platforms, sea/land In the base platform, the integrated message processing system formats and encapsulates heterogeneous messages in different airspaces and different types of edge networks according to common protocols, and realizes information storage/retrieval and publish/subscribe functions. 7. A kind of airborne network system according to claim 6, characterized in that, the integrated message processing system specifically includes a processor and a memory, the processor executes all program instructions in the memory; the memory includes a message conversion unit, Mass storage unit, ontology composition engine, message middleware and service-oriented infrastructure; message conversion unit, mass storage unit, ontology composition engine, message middleware and service-oriented infrastructure are interconnected through memory internal bus; message conversion unit receives The source information generated by the information sensor is encapsulated according to the general protocol; at the same time, the message conversion unit extracts the encapsulated original information from the received message packet or multimedia packet, and uses the corresponding local protocol to convert it into non-IP The message enables it to be transmitted in the edge network; the encapsulation package generated by the message conversion unit is stored in a mass storage unit, and each encapsulation package is associated with a metadata record. The complete information summary generated by the ontology structure; the ontology combination engine will filter the received package packets according to the ontology structure of the battlefield information domain, and delete useless information from the mass storage unit; the message middleware adopts machine-to-machine The transmission mechanism provides asynchronous information sharing for the grid nodes and backbone nodes of the airborne network; the information distribution service provided by the information distribution module of the message middleware is used to establish an end-to-end connection in the core network; the service-oriented basic components publish The /subscription mechanism provides the remote node with the Web service entry of the local information resource and periodically explores the remote node and its information resource. 8. A message processing method for issuing information by a backbone node of an airborne network system, characterized in that it comprises the following steps: Step 1: Obtain information from sources; The integrated message processing system obtains source information from information sensors, mainly including data, text messages, and multimedia information such as voice, image, and video; Step 2: Encapsulate and package the information based on the general protocol; The integrated message processing system sends the source information to the message conversion unit of the memory and packs it according to the common protocol; Step 3: Generate metadata associated with the information; The ontology combination engine generates corresponding metadata according to the characteristics of the source information, and saves it as a metadata record in the mass storage unit; the ontology combination engine classifies the metadata records according to the unified ontology structure of the battlefield information domain, so that similar information can be categorized into One category and related to each other; the ontology combination engine filters out the information that cannot be classified; Step 4: Store the packaging package and metadata records; According to the ontology structure, the packaging package and related metadata records are stored in the mass storage unit; the mass storage unit includes several federated databases, each of which stores a part of information; the federated database has a web service entrance, and other nodes can directly access it; Step 5: Publish information; Service-oriented basic components publish information for other remote nodes to subscribe to; all metadata records in the mass storage unit form a directory, so that remote nodes can retrieve the directory through service-oriented basic components; if a remote node subscribes to For certain types of information, once the information is generated within the validity period, the service-oriented basic component will automatically send the corresponding package and its metadata records in the mass storage unit to the subscribing nodes immediately. 9. The message processing method for issuing information by a backbone node of an airborne network system according to claim 8, characterized in that, in said step 2, if the source information comes from the core network, then according to the destination node address in the core network Directly forward or extract the original information and convert it into a local message and send it in the edge network; if the source information comes from the edge network, the message conversion unit extracts the source information from the local message and then encapsulates it according to the general protocol, comprehensive message processing The system uses XML on the basis of the IP protocol; encapsulates text and data information into message packets, and uses VOIP, MPEG, and DVB protocols to encapsulate multimedia information such as voice, image, and video into multimedia packets; the full name of the IP protocol is Internet Protocol The full name of XML is Extensible Markup Language; the full name of VOIP is Voice over Internet Protocol; the full name of MPEG is Moving Pictures Experts Group; the full name of DVB is Digital Vedio Broadcasting. 10. A message processing method for subscription information of an airborne network system backbone node, characterized in that it comprises the following steps: Step 1: generate metadata; Subscribing nodes generate metadata records corresponding to the required information according to their own needs and according to the ontology structure of the battlefield information domain; Step 2: information retrieval; The subscribing nodes perform keyword retrieval on all metadata records in the mass storage units of several remote nodes; Step 3: Whether the retrieval result is empty; The subscribing node judges whether to obtain the required information immediately according to all the returned retrieval results; if the retrieval result is not empty, it indicates that the required information is found and obtained immediately, the message processing process ends and transfers to the end-to-end link establishment process; If the search result is empty, it means that the required information has not been found, and the message processing process needs to be further executed; Step 4: whether to modify metadata; If the search result in step 3 is empty, ask the user whether to modify the currently generated metadata record; the empty search result may be caused by the ontology structure mismatch between the publishing and subscribing parties or the inconsistency between the metadata record and the required information; if To modify the metadata, repeat steps 1 to 3; if the metadata record remains unchanged, continue the message processing process; Step 5: Subscribe information; When the ontology structures of the battlefield information domains of the information publishing and subscribing parties are completely matched and the metadata records are completely consistent with the required information, the information retrieval result is empty, indicating that the information cannot be obtained from the airborne network system; at this time, the subscribing node is in all Once the information is generated within the validity period, the publishing node will automatically send the corresponding package and its metadata records to the subscribing node.

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