SDN air-sea cross-domain communication gateway

Abstract

The invention discloses an SDN air-sea cross-domain communication gateway, and belongs to the technical field of wireless communication. The system comprises a multimode communication unit, an SDN control unit and a power supply device. The multimode communication unit is in line connection with the SDN control unit; the power supply device is in wire connection with the multimode communication unit and the SDN control unit; the multi-mode communication unit comprises an underwater communication module, an overwater communication module and a heterogeneous protocol conversion module; the floating body covers the outer part of the cylindrical shell; the overwater communication module, the heterogeneous protocol conversion module, the SDN control unit and the power supply device are fixedly connected in the cylindrical shell, and the underwater communication module is fixedly connected below the cylindrical shell. Through real-time protocol conversion and resource scheduling, accurate optimization of cross-medium link bandwidth, time delay and reliability is realized, and diversified QoS requirements of high-real-time video transmission, low-time-delay control instructions, high-reliability data return and the like under the scenes of ocean monitoring, unmanned system collaboration and the like are met.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to an SDN air-sea cross-domain communication gateway. Background Art

[0002] With the surge in demand for global marine resource development and ecological protection, the contemporary ocean exploration system is undergoing an intelligent evolution from single underwater observation to air-space-land-sea cross-domain collaboration. The three-dimensional monitoring network composed of underwater sensor arrays, unmanned submersibles, marine drones and low-orbit satellites plays a key role in marine environmental early warning, ecological research and emergency rescue. However, the existing air-sea cross-domain network has significant technical bottlenecks, high cross-media communication latency, and difficult to achieve dynamic scheduling of cross-domain resources, which cannot meet the differentiated QoS requirements under the multi-task system.

[0003] Software Defined Network (SDN) technology provides a revolutionary solution for cross-domain air and sea networks by decoupling the control plane and the data plane. Its centralized control architecture can sense the terminal position information of surface ships, buoy nodes and drones in real time, realize millisecond-level path replanning, significantly improve the dynamic scheduling capability of network resources, and provide the possibility to meet differentiated QoS requirements. However, the existing buoy gateways generally lack SDN protocol stack support, which has become a key issue restricting the implementation of the technology.

[0004] Therefore, it is necessary to provide an SDN air-sea cross-domain communication gateway. Summary of the invention

[0005] The purpose of the present invention is to provide an SDN air-sea cross-domain communication gateway to solve the problems of poor SDN compatibility, low cross-domain resource scheduling efficiency and insufficient differentiated service quality (QoS) guarantee capability caused by the rigid hardware architecture and static control strategy of the buoy gateway in the existing air-sea cross-domain network.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: An SDN air-sea cross-domain communication gateway, comprising: A multi-mode communication unit, an SDN control unit and a power supply device; the multi-mode communication unit is connected to the SDN control unit by wire; the multi-mode communication unit is used for real-time protocol conversion; the SDN control unit is used for resource scheduling; the power supply device is connected to the multi-mode communication unit and the SDN control unit by wire to provide electric energy; the multi-mode communication unit includes an underwater communication module, an above-water communication module and a heterogeneous protocol conversion module; A cylindrical shell and a floating body covering the outside of the cylindrical shell; the above-water communication module, the heterogeneous protocol conversion module, the SDN control unit and the power supply device are all fixedly connected in the cylindrical shell, and the underwater communication module is fixedly connected below the cylindrical shell.

[0007] Furthermore, the underwater communication module includes: an underwater signal processing module and a transceiver transducer; the underwater signal processing module is connected to the transceiver transducer line, and is used to process the transceiver transducer signal and send it to the heterogeneous protocol conversion module, or process the heterogeneous protocol conversion module signal and send it to the transceiver transducer.

[0008] Furthermore, the water communication module includes: a Beidou communication module, a mobile communication module, a radio communication module and a communication antenna; The Beidou communication module is used to communicate with the Beidou satellite network; The mobile communication module is compatible with 4G / 5G maritime base station access protocol and supports dynamic spectrum sharing (DSS) technology; The radio communication module integrates Wi-Fi6 and LoRa dual-band RF front-ends to build a self-organizing network with mobile nodes.

[0009] Furthermore, the heterogeneous protocol conversion module includes: a protocol parsing subunit and a semantic encapsulation subunit, which are used to complete the conversion of surface and underwater communication protocols.

[0010] Furthermore, the SDN control unit includes: a resource scheduling module, a data packet analysis module and an SDN controller; The resource scheduling module is used for monitoring data packet load and achieving load balancing under a network structure of multiple controllers; The data packet analysis module is used to analyze the data packet transmission request sent by the switch and analyze the data packet QoS requirement.

[0011] Furthermore, the SDN controller includes: a link perception evaluation module, a routing planning module and a flow table sending module, and the SDN controller is provided with an OpenFlow1.3 protocol; The link perception evaluation module forms an attribute matrix of each link by analyzing and evaluating each link in the network; The routing planning module is used to receive the analysis information of the data packet analysis module, determine the multi-hop transmission link of the QoS satisfaction rate, and form a flow table; The flow table sending module is used to send the flow table to the corresponding switch.

[0012] Furthermore, the power supply device includes: a power supply and a solar panel; the solar panel is connected to the power line; the power supply is connected to the multi-mode communication unit and the SDN control unit line.

[0013] Furthermore, the communication antenna and the solar panel are both fixedly connected to the top of the cylindrical shell, and the outer cover of the communication antenna is provided with an antenna protection cover.

[0014] Furthermore, the antenna protection cover is made of fiberglass.

[0015] The present invention has the following beneficial effects: The present invention builds a relay hub for an air-space-ground-sea integrated network by integrating hydroacoustic, satellite, mobile and radio communication modules. The core value lies in the deep integration of the centralized control capability of the SDN architecture and the dynamic adaptation mechanism of multimodal communication. As an SDN controller, the buoy can globally perceive the air-sea cross-domain network status, break through the bottleneck of heterogeneous and dynamically changing topology of traditional air-sea communication protocols through real-time protocol conversion and resource scheduling, and achieve precise optimization of cross-media link bandwidth, delay and reliability, meeting the diverse QoS requirements such as high real-time video transmission, low-latency control instructions, and high-reliability data return in scenarios such as ocean monitoring and unmanned system collaboration. At the same time, its cylindrical shell and split anti-interference design ensure the stability of multi-mode communication in complex marine environments, while solar self-power supply and SDN energy efficiency management work together to ensure that the buoy provides differentiated QoS guarantees in an unmanned environment for a long time, providing an innovative infrastructure support for air-sea cross-domain networks with intelligent decision-making, elastic expansion and sustainable operation, and solving the problems of poor SDN compatibility, low cross-domain resource scheduling efficiency and insufficient differentiated service quality (QoS) guarantee capabilities caused by the rigid hardware architecture and static control strategy of the buoy gateway in the existing air-sea cross-domain network. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of an application scenario of the SDN air-sea cross-domain communication gateway according to an embodiment of the present application; Figure 2 This is a schematic diagram of the integrated structure of the SDN air-sea cross-domain communication gateway in the embodiment of the present application.

[0017] Among them: 1. Communication antenna; 2. Each link; 3. Floating body; 4. Cylindrical shell; 5. Transceiver and transducer; 6. SDN controller; 7. Heterogeneous protocol conversion module; 8. Underwater communication module; 9. SDN control unit; 10. Multi-mode communication unit; 11. Power supply device. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] The embodiment of the present application provides an SDN air-sea cross-domain communication gateway, including: A multi-mode communication unit 10, an SDN control unit 9 and a power supply device 11; the multi-mode communication unit 10 is connected to the SDN control unit 9 by wire; the multi-mode communication unit 10 is used for real-time protocol conversion; the SDN control unit 9 is used for realizing resource scheduling; the power supply device 11 is connected to the multi-mode communication unit 10 and the SDN control unit 9 by wire for providing electric energy; the multi-mode communication unit 10 includes an underwater communication module 8, an above-water communication module and a heterogeneous protocol conversion module 7.

[0020] The cylindrical shell 4 and the floating body 3 covering the outside of the cylindrical shell 4; the water communication module, the heterogeneous protocol conversion module 7, the SDN control unit 9 and the power supply device 11 are all fixedly connected in the cylindrical shell 4, and the underwater communication module 8 is fixedly connected below the cylindrical shell 4. It can be understood that the cylindrical shell 4 is a hollow cylinder for protecting the internal components. The floating body 3 is used to support the buoy to float and is wrapped outside the cylindrical shell.

[0021] Among them, the underwater communication module 8 includes: an underwater signal processing module and a transceiver and transducer 5; the underwater signal processing module is connected to the transceiver and transducer 5 by wire, used to process the signal of the transceiver and transducer 5 and send it to the heterogeneous protocol conversion module 7, or process the signal of the heterogeneous protocol conversion module 7 and send it to the transceiver and transducer 5.

[0022] The marine communication module includes: Beidou communication module, mobile communication module, radio communication module and communication antenna 1. Beidou communication module is used to communicate with Beidou satellite network. The mobile communication module is compatible with 4G / 5G maritime base station access protocol and supports dynamic spectrum sharing (DSS) technology. The radio communication module integrates Wi-Fi6 and LoRa dual-band RF front-end to build a self-organizing network with mobile nodes.

[0023] The heterogeneous protocol conversion module 7 includes: a protocol parsing subunit and a semantic encapsulation subunit, which are used to complete the conversion of surface and underwater communication protocols.

[0024] The SDN control unit 9 includes: a resource scheduling module, a data packet analysis module and an SDN controller 6. The resource scheduling module is used for data packet load monitoring and load balancing under a network structure of multiple controllers. The data packet analysis module is used for analyzing data packet transmission requests sent by switches and analyzing data packet QoS requirements.

[0025] The SDN controller 6 includes: a link perception evaluation module, a routing planning module and a flow table sending module. The OpenFlow 1.3 protocol is set in the SDN controller 6. The link perception evaluation module forms an attribute matrix of each link 2 by analyzing and evaluating each link 2 of the network. The routing planning module is used to receive the analysis information of the data packet analysis module, determine the multi-hop transmission link of the QoS satisfaction rate, and form a flow table. The flow table sending module is used to send the flow table to the corresponding switch.

[0026] The power supply device 11 includes: a power supply and a solar panel; the solar panel is connected to the power line; the power supply is connected to the multi-mode communication unit 10 and the SDN control unit 9 by wire.

[0027] The communication antenna 1 and the solar panel are both fixedly connected to the top of the cylindrical shell 4, and the outer cover of the communication antenna 1 is provided with an antenna protection cover, which is made of fiberglass.

[0028] The air-sea cross-domain communication gateway of the SDN in this embodiment integrates multi-mode interfaces such as underwater acoustic communication, radio communication, mobile communication and satellite communication to realize an integrated network integrating air-space-ground-sea multi-network domains; the SDN controller is equipped with an edge computing unit to dynamically implement load balancing and execute QoS strategies based on data flow load; the innovatively designed protocol conversion system can eliminate the gap between underwater acoustic communication and water communication, and improve cross-domain transmission efficiency. The air-sea cross-domain communication gateway of the SDN in this embodiment will become the core fulcrum for building a resilient marine information infrastructure, providing key technical support for marine exploration.

[0029] The present application embodiment provides a working method of an SDN air-sea cross-domain communication gateway, which is as follows: When in use, the underwater communication module 8 receives the modulated sound wave signal sent by the underwater sensor or submersible through the transceiver and transducer 5 suspended at the bottom. After pre-processing to eliminate the multipath effect and noise interference of the seawater channel, the underwater signal processing module converts the acoustic physical layer signal into a request data packet containing a QoS label and communication requirements. This data packet is only used to provide a basis for the SDN controller 6 to formulate a routing strategy.

[0030] The data is transmitted to the SDN control unit via the bus, and the data packet analysis module identifies the data label and extracts the QoS requirements of the task performed by the sending node and the destination node of the data packet. Then, the routing planning module in the SDN controller 6 selects the appropriate routing strategy (such as the minimum delay, the highest reliability, etc.) according to the QoS requirements of the request data packet and the destination node, calculates the multi-hop path with the highest QoS satisfaction rate, and forms a flow table.

[0031] The flow table is processed by the multi-mode communication unit through the flow table sending module and converted into multiple forms such as modulated sound wave signals and modulated electromagnetic wave signals, and is sent to the network nodes involved in the multi-hop path through the transceiver transducer 5 or the communication antenna 1 to provide routing basis for the network nodes.

[0032] The request packet sending node forwards the task packet to the next-hop network node in the form of a modulated acoustic signal according to the received flow table, and reaches the buoy gateway after one or more hops. After being received by the transceiver transducer 5, it is converted into a form containing the original data payload required for the task by the underwater signal processing module, processed by the heterogeneous protocol conversion module and the water communication module required for the communication of the next-hop (water) network node, and sent to the water node via the communication antenna.

[0033] The modulated electromagnetic wave signal reaches the destination node after one or more hops, and the communication process ends.

[0034] It should be noted that ocean exploration missions often require multiple communications and processing analysis support. The above case only provides a detailed description of the communication process in which one communication is requested by the underwater node and received by the surface node, and does not represent the complete mission execution under actual usage conditions.

[0035] Further, the routing strategy is described as follows: The data packet analysis module extracts the service type (such as real-time video, environmental telemetry or control instructions) and priority parameters in the QoS label. The SDN controller 6 performs multi-dimensional dynamic decision-making based on the preset policy library and the real-time collected global network status (including the available bandwidth of the satellite link, the delay jitter of the mobile communication module, the node topology of the radio ad hoc network and the remaining power of the power supply unit): QoS requirements are matched according to the business type. If it is high real-time data (such as earthquake early warning instructions), a flow table entry is generated to specify its transmission through the low-latency 5G mobile communication link and marked as the highest priority to seize channel resources; if it is bandwidth-sensitive large-scale monitoring data (such as seabed topography scanning results), a flow table entry is created to route it to a high-throughput satellite communication link, and at the same time, the data fragmentation and redundancy check mechanism is triggered to deal with satellite channel errors; if the target node is within the radio coverage of the buoy (such as a nearby drone), a flow table entry is generated to enable Wi-Fi direct transmission to reduce backhaul costs.

[0036] The SDN controller 6 continuously monitors the performance indicators of each link 2. When it detects that the bandwidth of the satellite link drops to the threshold due to weather interference, it immediately updates the flow table entry to dynamically migrate part of the data traffic to the backup radio relay link, and balances the energy consumption and reliability of the underwater link by adjusting the transmission power and modulation order of the underwater acoustic module.

[0037] The power supply unit is powered by solar panels and allocates regulated power to high-priority communication modules (such as satellite RF front-end) according to the energy consumption strategy issued by the SDN controller 6, while switching to energy-saving mode for low-priority modules.

[0038] The present invention builds a relay hub for an air-space-ground-sea integrated network by integrating hydroacoustic, satellite, mobile and radio communication modules. The core value lies in the deep integration of the centralized control capability of the SDN architecture and the dynamic adaptation mechanism of multimodal communication. As an SDN controller, the buoy can globally perceive the air-sea cross-domain network status, break through the bottleneck of heterogeneous and dynamically changing topology of traditional air-sea communication protocols through real-time protocol conversion and resource scheduling, and achieve precise optimization of cross-media link bandwidth, delay and reliability, meeting the diverse QoS requirements such as high real-time video transmission, low-latency control instructions, and high-reliability data return in scenarios such as ocean monitoring and unmanned system collaboration. At the same time, its cylindrical shell and split anti-interference design ensure the stability of multi-mode communication in complex marine environments, while solar self-power supply and SDN energy efficiency management work together to ensure that the buoy provides differentiated QoS guarantees in an unmanned environment for a long time, providing an innovative infrastructure support for air-sea cross-domain networks with intelligent decision-making, elastic expansion and sustainable operation, and solving the problems of poor SDN compatibility, low cross-domain resource scheduling efficiency and insufficient differentiated service quality (QoS) guarantee capabilities caused by the rigid hardware architecture and static control strategy of the buoy gateway in the existing air-sea cross-domain network.

[0039] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An SDN air-sea cross-domain communication gateway, characterized in that: include: A multi-mode communication unit, an SDN control unit and a power supply device; the multi-mode communication unit is connected to the SDN control unit by wire; the multi-mode communication unit is used for real-time protocol conversion; the SDN control unit is used for resource scheduling; the power supply device is connected to the multi-mode communication unit and the SDN control unit by wire to provide electric energy; the multi-mode communication unit includes an underwater communication module, an above-water communication module and a heterogeneous protocol conversion module; A cylindrical shell and a floating body covering the outside of the cylindrical shell; the above-water communication module, the heterogeneous protocol conversion module, the SDN control unit and the power supply device are all fixedly connected in the cylindrical shell, and the underwater communication module is fixedly connected below the cylindrical shell.

2. The SDN air-sea cross-domain communication gateway according to claim 1, characterized in that: The underwater communication module includes: an underwater signal processing module and a transceiver and transducer; the underwater signal processing module is connected to the transceiver and transducer line, and is used to process the transceiver and transducer signal and send it to the heterogeneous protocol conversion module, or process the heterogeneous protocol conversion module signal and send it to the transceiver and transducer.

3. The SDN air-sea cross-domain communication gateway according to claim 2 is characterized in that: The water communication module includes: a Beidou communication module, a mobile communication module, a radio communication module and a communication antenna; The Beidou communication module is used to communicate with the Beidou satellite network; The mobile communication module is compatible with 4G / 5G maritime base station access protocol and supports dynamic spectrum sharing (DSS) technology; The radio communication module integrates Wi-Fi6 and LoRa dual-band RF front-ends to build a self-organizing network with mobile nodes.

4. The SDN air-sea cross-domain communication gateway according to claim 1, characterized in that: The heterogeneous protocol conversion module includes: a protocol parsing subunit and a semantic encapsulation subunit, which are used to complete the conversion of surface and underwater communication protocols.

5. The SDN air-sea cross-domain communication gateway according to claim 1, characterized in that: The SDN control unit includes: a resource scheduling module, a data packet analysis module and an SDN controller; The resource scheduling module is used for monitoring data packet load and achieving load balancing under a network structure of multiple controllers; The data packet analysis module is used to analyze the data packet transmission request sent by the switch and analyze the data packet QoS requirement.

6. The SDN air-sea cross-domain communication gateway according to claim 5, characterized in that: The SDN controller includes: a link perception evaluation module, a routing planning module and a flow table sending module, and the SDN controller is provided with an OpenFlow1.3 protocol; The link perception evaluation module forms an attribute matrix of each link by analyzing and evaluating each link in the network; The routing planning module is used to receive the analysis information of the data packet analysis module, determine the multi-hop transmission link of the QoS satisfaction rate, and form a flow table; The flow table sending module is used to send the flow table to the corresponding switch.

7. The SDN air-sea cross-domain communication gateway according to claim 3, characterized in that: The power supply device comprises: a power supply and a solar panel; the solar panel and the power supply are connected by wire; the power supply is connected by wire to the multi-mode communication unit and the SDN control unit.

8. The SDN air-sea cross-domain communication gateway according to claim 7, characterized in that: The communication antenna and the solar panel are both fixedly connected to the top of the cylindrical shell, and the outer cover of the communication antenna is provided with an antenna protection cover.

9. The SDN air-sea cross-domain communication gateway according to claim 8, characterized in that: The material of the antenna protection cover is glass fiber reinforced plastic.

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