67 results about "Star network" patented technology

The invention discloses a quantum security multi-party computing method of a hybrid topological structure, which is applied to a quantum security multi-party computing system, the quantum security multi-party computing system comprises m sub-networks of star network topological structures, and each sub-network corresponds to a quantum center and a plurality of users; quantum communication is completed between every two quantum centers based on a ring network topology structure; the quantum security multi-party computing method comprises the following steps: each quantum center completes modular addition operation of a corresponding user secret value in a corresponding subnet to obtain a modular addition result of all user secret values in the corresponding subnet, and the modular addition result is recorded as a subnet secret value modular addition result; and on the basis of a subnet secret value modular addition result, each quantum center continuously participates in the secure multi-party computing protocol among the quantum centers to obtain the sum of all user secret values in the quantum secure multi-party computing system. According to the method, on the premise that private secrets of users are not leaked, safer and more efficient quantum security multi-party calculation can be realized among the users with limited quantum capabilities.

The invention provides an equipment networking method and system based on a distributed soft bus, and the method comprises the steps: starting a distributed soft bus module and carrying out the discovery of adjacent equipment, and obtaining a trusted equipment set after identity verification; a point-to-point communication link between the devices is established according to the trusted device set, and a distributed mesh interconnection topology is formed; performing routing calculation and data forwarding on data transmission in the mesh topology to realize end-to-end communication; meanwhile, dynamic changes of equipment in the network are monitored, topology updating is carried out, and the network stability is maintained. The scheme does not depend on the dependence of the traditional star network on the central node, realizes direct interconnection between devices through the distributed soft bus technology, improves the fault-tolerant capability and transmission efficiency of the network, and solves the problems of poor network reliability and limited expansibility in the prior art.

The invention relates to the technical field of image processing, and discloses an improved StarNet-YOLOv13-based unmanned aerial vehicle field tobacco virus disease lightweight detection method, which comprises the following steps: acquiring a to-be-detected image of a field tobacco plant, and then inputting the to-be-detected image into a trained tobacco virus detection model to obtain a detection result of the tobacco plant; wherein the tobacco virus detection model is obtained by replacing a backbone network with a star network, replacing a C3K2 module in a neck network with a feature fusion module and replacing a detection head with a DetectMBConv detection head in a YOLOv13 model; the feature fusion module is constructed by introducing a partial convolution mechanism into the C3K2 module; thus, through the star network (StarNet), the feature fusion module (DSC3k2PConv module) and the DetectMBConv detection head, the small target scab detection capability and the complex scene robustness can be improved while the parameter and calculation overhead can be reduced, so that the tobacco virus detection model can meet the deployment requirement of the computing power limited equipment side, such as an unmanned aerial vehicle, and the detection precision is ensured at the same time.

The invention discloses a foreign language word card, which is characterized in that a picture is arranged on the front side of the card and expresses characteristic elements or related attributes of a word; the core method of five-star networked words (FSNW: Five Star Networked Word) introduced in the invention is arranged on the back side of the card. The FSNW comprises the word itself and five most meaningful contexts thereof, namely definition, synonym, antonym, hyponym and affix. The display form of the networked words included in the FSNW can be changed according to the selected difficulty level, for example, an English word beader, and when the difficulty level is low, the display form is beader; and when the difficulty level is middle, the display form is b.... r, namely, each middle letter is replaced by a point (.). The FSNW card can be used like a word guessing game, that is, after the card is read, a learner needs to spell the networked word; the FSNW helps a learner to get rid of learning words in an isolated context, helps the learner to fully understand the words, and can easily retrieve the words when the words are forgotten.

The invention discloses an unmanned aerial vehicle unmanned recovery operation method and system based on an automatic recovery vehicle, and belongs to the technical field of unmanned aerial vehicle automation. The system comprises a nest box body serving as a hub, a signal tower connected with the nest box body, an external take-off and landing site, an automatic recovery vehicle and a cloud management platform. The core of the method is that a cloud platform issues an instruction, and a recovery vehicle takes out an unmanned aerial vehicle from a machine nest and transfers the unmanned aerial vehicle to a take-off and landing site for flying; and after the unmanned aerial vehicle returns and lands, the recovery vehicle actively goes forward to capture and carry back to the nest, and charging and inspection are completed. The mobile recovery vehicle with a self-adaptive interface conversion module is introduced as an execution medium, a high-precision docking demand is transferred from the air to the ground, and a star network architecture with a nest as a core is adopted, so that the recovery risk of the unmanned aerial vehicle and the dependence of the system on a specific model are remarkably reduced, and the recovery efficiency is improved. And the reliability, the compatibility and the full-automatic operation capability in a complex environment are improved.

A method for avoiding high-frequency communication conflicts in LoRa multi-node communication includes the following steps: Step 1: Constructing a star network topology for LoRa wireless nodes; Step 2: Setting up a LoRa network for data terminal nodes; Step 3: Setting up relay nodes and agreeing on a data upload time period; Step 4: Dividing the uplink transmission period of terminal nodes into multiple time slots. Each node is assigned a corresponding transmission time slot; Step 5: Assigning priorities to each terminal node, creating a table of given node sequence lists and initial state of transmitted nodes, preprocessing the data, and uploading the data from the terminal node to the relay node. This invention achieves non-interference in uplink data transmission among terminal nodes by dividing terminal node priorities into two bits and uplink data transmission time slots. Terminal nodes listen to priority data packets and create tables, ensuring that uplink data transmission among terminal nodes does not interfere with each other, urgent data is uploaded first, and the two priority data bits guarantee the integrity of node data transmission.

The invention relates to the technical field of palm vein recognition, in particular to an efficient palm vein representation attack detection method and system based on a lightweight neural network. The method comprises the following steps: acquiring an image to be identified; inputting a to-be-recognized image into the Xception entry stream, and performing preliminary feature extraction on the to-be-recognized image to obtain an initial feature; inputting the initial features into Block modules of a star network, and further mining high-order nonlinear features in the image by each Block module through convolution and star operation; and performing classification identification on the high-order nonlinear features to obtain classification result data. Real and forged palm vein images are distinguished by capturing vein texture features in the images, a single-channel near-infrared palm vein image is input, and a binary result of true and false classification is output.

The invention provides an annealing kiln temperature control system and method and a storage medium, relates to the field of annealing kiln control, and solves the technical problem that stable and accurate control of the temperature of an annealing kiln is difficult to realize in the prior art. The system specifically comprises a sensor detection unit which comprises infrared thermometers located in each transverse sub-zone of the annealing kiln, a flow thermometer located in a transverse air duct of the annealing kiln, and an extended compensation wire thermocouple; the execution control unit comprises an electric butterfly valve arranged in a cooling air duct of the annealing kiln and a fan used for adjusting the air temperature; the star network topology structure comprises an Ethernet switch and an upper computer, the Ethernet switch is used for establishing communication connection with the upper computer by taking equipment of the annealing kiln as slave station equipment; the upper computer is used for acquiring annealing kiln control data; adjusting the temperature of the annealing kiln; and an annealing kiln comprehensive database is established, and operation data of the annealing kilns are recorded, summarized and uploaded in real time. The method is used for controlling the temperature of the annealing kiln.

The invention belongs to the technical field of automotive electronics, and relates to a high-anti-interference controller PCB layout structure for an electric power steering system, a PCB is a multilayer board, and the PCB layout structure is characterized in that a power ground loop of a high-frequency switching circuit is directly connected to a grounding end of a common mode inductor to realize single-point discharge of high-frequency noise; the analog signal circuit is far away from the high-frequency digital signal circuit in layout; the MCU power supply decoupling capacitors are arranged around the MCU in a distributed star network; the PCB layout structure is provided with a power ground plane and a signal ground plane which are completely isolated, and the power ground plane and the signal ground plane are connected only through a single common mode inductor; in the PCB layout structure, a driving signal, a feedback signal, a sampling signal and a power signal of the inverter bridge part are respectively arranged in different PCB layers; the current sampling precision and the system reliability are remarkably improved, the steering hand feeling is improved, the electromagnetic compatibility is excellent, and the engineering application value is very high.

The application belongs to the technical field of launch vehicle electronic information system, and particularly relates to a launch vehicle communication network system based on Powerlink. The system comprises a two-stage star network of a launch vehicle, an inter-stage star network, a first-stage tail star network and a main bus adopting a Powerlink bus; a plurality of terminal slave nodes in the two-stage section access a two-stage network repeater through a star topology communication link, a master node and the two-stage network repeater are connected in series to the main bus through a two-stage interface; a plurality of terminal slave nodes in the inter-stage section access an inter-stage network repeater through a star topology communication link, a redundant master node and the inter-stage network repeater are connected in series to the main bus through an inter-stage interface; a plurality of terminal slave nodes in the first-stage tail section access a first-stage tail network repeater through a star topology communication link, and are connected to the main bus through a first-stage tail interface. The system has high real-time performance and high reliability.

This disclosure presents an intelligent star map recognition method, apparatus, device, and medium based on multi-network mapping. One specific implementation of the method includes: extracting features from a star image using a pre-constructed star feature extraction network and an extracted set of star information to generate feature information for each node; constructing a graph network from the star information set based on star-sensor camera parameters to generate a star network structure; performing star map recognition on the star network structure using a pre-constructed star map recognition network model, the feature information for each node, and prior attitude information to generate a star recognition result; caching the star recognition result; and outputting the star recognition result to the spacecraft's attitude control system in real time. This implementation can ensure a high star recognition rate while significantly reducing the storage complexity of the feature library and the computational complexity of the algorithm, and exhibits stronger robustness to changes in the number of stars and noise in star magnitude information.

A plug-and-play resident energy consumption analysis device disclosed by the present invention comprises a shell detachably arranged on a power strip body and a lifting plate arranged in the shell and lifting in the shell, jacks of the power strip are arranged on the lifting plate, first metal sheets are symmetrically arranged at the lower ends of the jacks on the lifting plate, and second metal sheets are symmetrically arranged at the lower ends of the jacks on the lifting plate. Each first metal sheet is provided with a positioning mechanism for positioning a plug, the bottom of the power strip body is provided with a second metal sheet extending between the two first metal sheets, and the power strip body is also internally provided with a dual-frequency transceiver and a memory; after the socket is plugged in, after the built-in double-frequency transceiver of the socket is powered on, star-shaped network automatic networking is completed by taking the electric energy meter as a unique root node, the total meter electric quantity can be read in real time and the energy consumption of each branch can be locally split without any distribution network interaction, and electric energy comparison analysis and accuracy verification can be realized in combination with the data of the electric energy meter.

This invention discloses a wafer-level chip, board, and electronic device. The wafer-level chip includes multiple computing blocks, each computing block including a switching node and multiple computing nodes distributed around the switching node. The multiple computing nodes in the computing block and the switching node are interconnected through a first network, which includes a ring network and a star network. The multiple computing nodes in the computing block are interconnected through the ring network, and the switching node in the computing block is interconnected with the multiple computing nodes through the star network. The switching nodes of the multiple computing blocks are interconnected through a second network. The bandwidth of the first network is less than the bandwidth of the second network. The wafer-level chip provided by this invention can achieve a balance between bandwidth and latency under the premise of high bandwidth and low latency, and can significantly improve robustness in the event of node failure.

The invention discloses a waveguide feed double-frequency low-profile antenna of a conformal small unmanned aerial vehicle, and belongs to the technical field of antennas. According to the waveguide feed double-frequency low-profile antenna, through double-layer arrangement of the waveguide feed layer and the dipole radiation layer, a slot antenna is formed on the waveguide feed layer, and a dipole antenna is formed on the dipole radiation layer, so that the waveguide feed double-frequency low-profile antenna integrates the slot antenna and the dipole antenna and has two radiation modes; therefore, the antenna can be used as a dual-frequency antenna, the slot antenna works in an S frequency band, and the dipole antenna works in a 5G frequency band. The antenna is applied to a small unmanned aerial vehicle, has the characteristics of compact structure and high gain, has the capability of accessing a public network and a star network, and solves the problem that an existing unmanned aerial vehicle antenna does not have the dual-band communication capability of a 5G band and an S band.

The application discloses a load balancing dynamic access method under multi-satellite coverage, which comprises the following steps: classifying user terminal services according to QoS requirements on the user side, generating a service multi-target utility function according to service indexes, and generating multi-target weight coefficients according to the importance of different services; constructing a terminal visible satellite set and an adjacent satellite set of each satellite on the satellite side, and proposing a load balancing degree parameter and a load adjustment method of the terminal visible satellite set and the adjacent satellite set of each satellite, so that the satellite network corresponding to the current user terminal can reach dynamic load balancing within a certain time. The method can meet the multi-target requirements of different types of services of the ground user terminal, consider the actual capacity of the satellite network, and make the satellite network corresponding to the current user terminal reach local dynamic load balancing within a certain time and a certain range, and can be applied to low-orbit satellite network service access such as China Star Network.

The invention relates to a multi-band four-arm spiral composite antenna. The antenna mainly comprises a top antenna unit and at least two four-arm helical antenna units which are located below the top antenna unit, are in a coaxial distribution state and are arranged at intervals, the top antenna unit comprises a top assembly and first floors which are located below the top assembly and are arranged at intervals, and a balun structure is arranged between each first floor and the top assembly. The four-arm helical antenna unit comprises a top ring body, a bottom assembly and a cylindrical support body which is located between the top ring body and the bottom assembly and is made of a PEEK material, a helical antenna is fixed in a helical groove of the cylindrical support body, the top end of the helical antenna is connected with the top ring body, and the bottom end of the helical antenna is connected with the bottom assembly; the bottom assembly comprises two power dividers and a metal floor located between the two power dividers. The antenna is high in overall supporting capacity, and does not deform in long-term vibration and impact environments. Meanwhile, the system has the receiving and transmitting functions of Beidou, Tiantong and star network signals.

The invention discloses a cluster head replacement method based on hop counts, and relates to the technical field of wireless ad hoc network communication. The method comprises the following steps: planning a cluster head in a cluster and establishing a star network with common nodes in the cluster; the nodes in the cluster maintain respective one-hop neighbor information tables through a neighbor discovery mechanism; the common nodes in the cluster send respective one-hop neighbor information to the planned cluster head through network management information; planning cluster head calculation to obtain a whole network hop count matrix, and selecting a backup cluster head node based on the number of one-hop and two-hop neighbors of the node; the planning cluster head sends selected backup cluster head node information to all common nodes through a network management message; and when the planned cluster head is offline, the backup cluster head is upgraded into the cluster head, and the cluster head resource is occupied to perform message interaction with the common node. According to the invention, a proper backup cluster head is selected with low communication overhead and low calculation complexity. When the cluster head is offline, the backup cluster head can well maintain network operation.

The invention provides an active alarm system and method based on LoRa star networking, and relates to the technical field of communication methods based on LoRa networking, and the system comprises child nodes and master-slave gateways, and completes a network access request from the child nodes to the master-slave gateways; the child nodes automatically wake up and report heartbeat packet data according to heartbeat packet periods, and each child node keeps an on-line state according to different heartbeat periods according to a task level of the child node; and channel quality evaluation is performed based on channel carrier detection and an LBT mechanism, and dynamic avoidance is realized, so that the problem of air congestion of data is avoided. The LoRa networking alarm system has the advantages that the transmission reliability, deployment cost performance and applicability of the LoRa networking alarm system are improved.

The invention discloses a meteorological ocean information transmission method based on a low-orbit satellite. The method comprises the following steps: establishing a bidirectional data link between a gateway station and a terminal through a low-orbit satellite communication system; collecting observation data of the monitoring equipment in real time, and transmitting the observation data back to the star network gateway station through the satellite internet; meteorological marine environment data, fusion products and marine monitoring data are stored by adopting a distributed architecture; generating a severe convection weather falling area forecast based on the numerical forecasting product; loading a large-data-volume product through a broadband communication link, and receiving real-time observation data through a narrowband communication link; dynamically selecting a broadband or narrowband communication link for data distribution according to weather conditions; and the terminal station decrypts and decompresses the received data, stores the data into the data management platform, and provides data service for the adjoint guarantee terminal through the service interface. According to the invention, the transmission efficiency and accuracy are improved, the cost is reduced, and the security is improved.

The invention relates to a star network soft fault detection and positioning method and device based on power line communication. The method is applied to a star network, and the star network comprises a transmitting end, a node, at least one receiver and an electric power communication modem. The method comprises the steps of firstly, obtaining reference transmission coefficients of receivers, meanwhile, obtaining real-time transmission coefficients, determined according to frequency domain test symbols sent by a sending end, of the receivers, then determining whether a soft fault exists in the star network or not according to the reference transmission coefficients and the real-time transmission coefficients of the receivers, and finally, if the soft fault exists, judging whether the star network has the soft fault or not. And if so, carrying out fault positioning according to the reference transmission coefficient and the real-time transmission coefficient of each receiver. By adopting the method, the soft fault can be accurately detected and positioned.

The invention discloses an intelligent CAN (Controller Area Network) bus star connection device and method simulating an Ethernet switch, which can avoid the work of configuring a terminal resistor for each node in a CAN bus network and frequently checking and confirming the connection and configuration of an end node and an intermediate node in a CAN bus communication system network during debugging by applying a device simulating the Ethernet switch. Software in the simulated Ethernet switch device can realize the functions of port number login, point-to-point switching, loopback type forwarding, one-to-multiple switching and the like by searching the received message frame ID value in the port forwarding table. According to the CAN bus star network simulating the Ethernet switch device, connection can be reestablished automatically when connection of nodes is changed, and fault diagnosis, isolation and positioning can be carried out quickly and conveniently through a disconnection method in CAN bus network debugging.

The application discloses a container traffic management method, device, equipment and system of a serverless architecture, relates to the technical field of cloud computing, and comprises the following steps: a center gateway node of a meta-cluster acquires a cross-domain data packet sent by a source container in a first container providing end; according to global routing information and identification information of a target container in the cross-domain data packet, a second container providing end is determined; the cross-domain data packet is sent to the second container providing end, so that the second container providing end sends the cross-domain data packet to the target container; the application constructs a star network topology with the centralized meta-cluster as a network hub, and accesses different capacity providing ends as radiation nodes, so that a unified and flat Pod covering network can be constructed on the physically isolated and network heterogeneous capacity providing ends; the center gateway node of the meta-cluster is used for forwarding the cross-domain data packet, so that direct communication between Pods deployed on different capacity providing ends under the serverless architecture is conveniently realized.

1. The name of the design product: coherent optical module. 2. The use of the design product: for power grid, star network, satellite internet and communication network. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The invention discloses an X-waveband miniaturized band-pass filter for a star network, which comprises a bottom mounting surface, a lower grounding capacitance layer, a middle key signal layer, an upper grounding capacitance layer and a top layer from bottom to top in sequence, the bottom mounting surface, the lower grounding capacitance layer, the middle key signal layer, the upper grounding capacitance layer and the top layer are connected through four metal through hole layers, and the middle key signal layer, the upper grounding capacitance layer and the lower grounding capacitance layer form an internal key resonant structure. The dense metal through hole structures are connected with the bottom layer and the top layer to be grounded, the left side face and the right side face are connected with the upper grounding capacitor layer and the lower grounding capacitor layer through the multiple columns of metal through holes, the middle key signal layer is wrapped inside, the structure greatly increases grounding interconnection, meanwhile, certain signal anti-interference characteristics are provided, and the frequency selectivity of the filter is improved. And the filter can work stably in severe environments such as strong radiation.

The invention relates to a method for forecasting an uncertain trajectory of a target by a low-orbit star network, and belongs to the technical field of detection and tracking. The method comprises the following steps: 1, establishing a multi-target dynamic model under spatial motion; step 2, establishing a satellite shot orbit dynamic model; 3, calculating the position and the speed of a satellite i under the geocentric inertial coordinate system according to the satellite shot orbit dynamic model in the step 2; step 4, according to the multi-target dynamic model in the step 1 and the position and speed of the satellite i in the geocentric inertial coordinate system in the step 3, determining that the target is in the detection range of the satellite optical sensor; 5, establishing a measurement equation of the target under the geocentric inertial coordinate system; forecasting the uncertain trajectory of the target according to the measurement equation of the target under the geocentric inertial coordinate system; according to the invention, target trajectory prediction under uncertain conditions during cooperative detection of a space moving target by a low-orbit star network is realized.

The present invention discloses a low-overhead robust time synchronization method for industrial wireless sensor networks, belonging to the field of industrial wireless communication networks. This method fully utilizes the heterogeneity of industrial network nodes to build a mesh-plus-star network topology. The upper-layer mesh network is composed of a small number of routing nodes with rich computing, communication, and storage capabilities, achieving wide-area coverage of the industrial network. Local logical clocks are updated based on time information periodically broadcast by neighboring routing nodes, implementing a distributed robust time synchronization method. The lower-layer star network is composed of a large number of resource-constrained, low-power network devices that implement a passive monitoring mechanism and synchronize with edge routing nodes in a single-hop manner, reducing the communication overhead of nodes within the star network. The present invention achieves robust time synchronization with low communication overhead and relatively fast convergence speed in a large-scale industrial wireless sensor network environment.

The invention discloses a wireless data acquisition system and method for a photovoltaic intelligent combiner box, the system is composed of a sending end deployed in the combiner box and a data convergence and return terminal arranged in a centralized manner, and the sending end sends acquired operation data to the convergence terminal through a first wireless link by using a LoRa communication module; the processor in the terminal performs analysis, aggregation, compression and protocol conversion processing on the received multi-path data, and then uniformly uploads the data to a cloud management platform through a 4G / 5G cellular network module via a second wireless link, the method realizes local low-power-consumption, long-distance and high-penetration data collection through the LoRa technology, effectively overcomes the wiring problem of complex terrains, and improves the data collection efficiency. According to the invention, complex wired wiring is reduced, a high-reliability star-shaped network is constructed, the deployment and operation and maintenance cost is remarkably reduced, and an efficient and stable intelligent data acquisition solution is provided for a photovoltaic power station.

The invention discloses a networking method and system for a cremation equipment working condition parameter wireless monitoring system based on a hierarchical protocol stack, and belongs to the technical field of industrial Internet of Things wireless communication. The invention provides a hierarchical protocol stack networking scheme for solving the problems that an existing cremation equipment wired monitoring system is complex in wiring and poor in expansibility, and the multi-node conflict rate is high and the transmission reliability is insufficient in wireless communication. According to the scheme, a unified time reference is established by periodically broadcasting synchronous signaling through a coordinator node, and an exclusive communication time slot is distributed for a terminal node by adopting a CS-TDMA (Center Coordinated Time Division Multiple Access) mechanism, so that the multi-node communication conflict is fundamentally avoided; meanwhile, in combination with a TS-DART (time-sharing dual-acknowledgement reliable transmission) mechanism, end-to-end reliable transmission is ensured through four handshake flows of'command-ACK-data-ACK '. The system adopts a star network topology, the coordinator is realized based on a CC2530 chip, and the terminal nodes are integrated with various sensor acquisition modules, so that the system has the characteristics of low power consumption, high reliability, strong interference resistance and the like, the real-time performance and the stability of cremation equipment working condition monitoring are remarkably improved, and the system is suitable for high-temperature and strong-interference industrial environments.

The application discloses a remote intelligent seismograph system based on star network communication and a working method thereof, and belongs to the field of seismic exploration. The remote intelligent seismograph system comprises a node seismograph module, the node seismograph module is in bidirectional communication with a remote management module through a star network communication unit, and the node seismograph module, the star network communication unit and the remote management module are electrically connected with a multi-source energy module. The node seismograph module is used for collecting seismic wave vibration signals and pre-processing the collected seismic wave vibration signals. The star network communication unit is used for receiving the pre-processed seismic wave vibration signals and uploading the signals to the remote management module. The remote management module is used for receiving the seismic wave vibration signals and outputting a three-dimensional fault model and a health monitoring report. The remote intelligent seismograph system based on star network communication and the working method thereof realize remote downloading and remote monitoring of data, and significantly improve the efficiency and reliability of seismic data collection and management.

The invention discloses a short-wave autonomous frequency-selecting radio networking architecture method and network control equipment, and belongs to the technical field of wireless communication. The method comprises the following steps of: constructing M radio stations into a multi-stage tree network architecture consisting of a first-stage network and a plurality of sub-networks, wherein the sub-network topology can be a star-shaped network and / or a mesh network; determining node affiliation of each subnet according to geographical distribution or organization structures of radio stations by adopting a non-uniform segmentation mode; the subnet scale is limited, the number of nodes of the first-level subnet and the number of nodes of the middle subnet do not exceed a first preset threshold N1, and the number of nodes of the last-level subnet does not exceed a second preset threshold N2; and for the handover nodes with upper and lower identities, keeping the handover nodes online at the same time in a time division multiple access or frequency division multiple access mode. According to the invention, through the grading and dividing architecture design, the network establishment time is effectively shortened, the transmission delay of the whole network is balanced, the dependence on external facilities is not needed, and the practicability and reliability of the short-wave network are improved.