25 results about "Mobile ad hoc network" patented technology

The application discloses a modulation and coding adaptive selection method for a mobile ad hoc network based on separation of a control plane and a data plane. In the mobile ad hoc network based on separation of the control plane and the data plane, a carrier sense multiple access (CSMA) mechanism is adopted in a control time slot to compete for sending fused situation information of itself, so as to complete survey and perception of neighbor nodes. The situation information includes link transmission quality and node queue length. In the data plane, the CSMA mechanism is also adopted, but the situation information of the control plane needs to be utilized to form certain 'network order', so as to reduce the decline of throughput caused by error packets and collision. On the basis of a traditional rate adaptive algorithm based on a signal-to-noise ratio (SNR), the algorithm is improved and applied to a mobile ad hoc network device based on separation of the control plane and the data plane.

The invention discloses a mobile ad hoc network route planning method and device based on LSTM node trajectory prediction, and the method comprises the steps: S1, adding mobile data containing the speed and position of a node into a Hello message, and periodically broadcasting the Hello message by each node in a mobile ad hoc network; s2, obtaining discrete mobile data of each node in the mobile ad hoc network through a Hello message, preprocessing the discrete mobile data, predicting the position of each node after a certain time period by using a trained LSTM model, and further obtaining position area data of a hop neighbor node of a local node within a certain time period; s3, based on the position prediction data of each node, a local node performs multi-point relay MPR selection in a one-hop neighbor node set by adopting a greedy algorithm; according to the method, while the balanced routing overhead is ensured, the data packet delivery rate is effectively improved, the average end-to-end delay is reduced, and the reliability requirement of the ad hoc network in the dynamic environment is met.

The application relates to a kind of approximate MDS construction method based on local information in mobile ad hoc network, the whole network node domination set is cut, algorithm is carried out in multiple rounds, each round is divided into four stages: neighbor information perception stage, tentative cutting stage, domination stage and dominated stage;Each node has a serial number to indicate its own ID, and maintains a local variable s to indicate the current state of node;Approximate MDS is constructed using the method disclosed in the application, and MCDS is constructed on this basis, so that the nodes in MCDS act as a virtual backbone network, which can provide routing for nodes when a segment of link in the shortest path fails or a node cannot calculate the shortest path due to network topology not converging.In actual application scenarios, the algorithm disclosed in the application can reduce the occurrence of un-dominated nodes and improve fault tolerance.

A node of a network communicating via mobile ad hoc network (MANET) waveforms and incorporating internet protocol (IP) security (IPSec) measures includes a plaintext (PT) user system or host, ciphertext (CT) communications module including a radio system for transmission and reception via MANET waveforms, IPSec cryptographic units, and PT and CT convergence modules. IPSec units provide encryption and decryption of data traffic as well as cross-layer exchange between PT and CT convergence modules. PT convergence modules map output traffic and decrypted input traffic to CT capabilities and exchange reachability information (e.g., addresses of reachable nodes or systems) with counterpart PT convergence modules of peer nodes of the MANET. CT convergence modules converge encrypted input and output traffic based on CT capabilities.

The invention discloses a tunnel emergency rescue structure detection method based on an unmanned aerial vehicle group. The method comprises the following steps that a detection unmanned aerial vehicle is controlled to enter a dangerous case tunnel and fly along a planned path; controlling the communication unmanned aerial vehicles to enter the dangerous case tunnel, and dynamically adjusting the position of each communication unmanned aerial vehicle to construct and maintain a dynamic mobile ad hoc network communication link; processing the acquired data through a micro data processor carried by the detection unmanned aerial vehicle to identify and mark abnormal area data as effective data; the detection unmanned aerial vehicle transmits effective data to a ground control station in real time through a mobile ad hoc network communication link; the ground control station analyzes the received data, constructs a tunnel structure model, evaluates a dangerous case and generates an emergency scheme; and recovering the unmanned aerial vehicle group, and synchronizing the total original data stored in the local detection unmanned aerial vehicle to a ground control station. The method has the advantages that the communication reliability and adaptability are improved; the detection precision and efficiency are improved; and the decision response speed is improved.

The invention discloses a method and system for establishing and maintaining a backbone subnet in a mobile ad hoc network, and the method comprises the steps: dividing nodes in a network into different node types according to a current state, and enabling the node types to comprise an assigned node, an isolated node, a common node and a backbone node; the backbone node periodically broadcasts the beacon, and the surrounding nodes of the backbone node perform node conversion according to the received backbone node beacon; if the isolated node receives the beacon of the backbone node, the isolated node becomes a common node; if the backbone node beacon is not received within the preset time, the isolated node is changed into a backbone node after timeout; if the common nodes receive the backbone node beacons, the common nodes become backbone nodes based on self-election according to the backbone node beacons; and the backbone node judges whether redundancy exists or not according to the received beacons of other backbone nodes, and if yes, the backbone node is changed into a common node based on self-cutting. According to the invention, the network overhead is reduced, and efficient networking and transmission are realized.

The application discloses a novel time slot allocation method for block relay network, and belongs to the field of mobile ad hoc network. The application sets the reply confirmation time slot related to the data sending time slot for the reply confirmation message, and re-plans the time sequence of the whole network. In the block relay network adopting the TDMA scheme with N time slot space multiplexing, the request message and the data packet are sent from the source node, and are diffused outward hop by hop and time slot by time slot until reaching the destination node or naturally disappearing. The reply confirmation message is sent from the destination node, and is propagated to the source node hop by hop. However, since it is a reverse link, there are idle time slots in the propagation process, which is manifested as that all the nodes in the network "stop" for the transmission of effective information in some time slots. The application optimizes the transmission time sequence of the reply confirmation message, and designs a new sending time slot for the packet marked as the reply confirmation message, so that a forward path for the transmission hop by hop and time slot by time slot is simulated under the condition of not violating the basic premise of the TDMA protocol, and the utilization rate of resources is improved.

The invention provides a mobile ad hoc network communication method and related equipment. The mobile ad hoc network communication method comprises the following steps: determining a mobile ad hoc network type; in response to determining that the mobile ad hoc network is a non-sparse mobile ad hoc network, determining a source node, a destination node, source node position information and destination node position information in the non-sparse mobile ad hoc network; determining a broadcast range according to the source node position information and the destination node position information, determining a next hop node according to the broadcast range, and performing communication according to the next hop node; and in response to the fact that the mobile ad hoc network is determined to be the sparse mobile ad hoc network, performing communication through a replication-based routing protocol.

This invention discloses an anti-interference and trusted identity collaborative authentication method and system for dense cluster communication. The method involves initializing and loading a cluster shared key; generating a time-varying communication-authentication parameter set based on this key and a synchronization clock, the parameter set including physical layer transmission parameters and an authentication token; during communication, the sender embeds the authentication token in the physical layer frame header, and the receiver completes communication synchronization and implicit identity authentication by comparing the token; when interference is detected, individual avoidance is implemented or a consensus mechanism is used to collaboratively switch to the next parameter set to get rid of the interference; simultaneously, suspicious nodes are identified and isolated based on continuous authentication failure records. This invention achieves deep integration of anti-interference and identity authentication, with advantages such as almost no additional overhead, strong collaborative anti-interference capability, and proactive intrusion defense, making it suitable for dense mobile ad hoc networks such as drones and unmanned vehicles.

The invention discloses a fire rescue on-site command combat network dynamic topology optimization method based on Mesh node state perception, and relates to the technical field of fire rescue team emergency communication and mobile ad hoc networks. Mesh node motion data are collected, and whether the nodes are in a static or moving state is judged through a lightweight sensor fusion algorithm; constructing a static straight-through link and forming a static backbone subnet; and a hierarchical heterogeneous routing strategy is adopted: for each static backbone sub-network, a logic sub-network coordinator is elected inside, a shortest path algorithm is operated to construct a static route, and data forwarding and the like are realized. According to the method, the network is reconstructed into a heterogeneous layered structure in which the static backbone subnet and the dynamic access edge are combined, so that the problems of sharp increase of routing overhead and network jamming when the scale of the traditional Mesh network is expanded are fundamentally solved, and the stable performance of the network in a multi-node and wide-coverage scene of a large-scale rescue site is ensured.

The present disclosure provides a multicast transmission method and related device through user equipment to user equipment relay, and relates to the technical field of communication. The method comprises: obtaining, applied to user equipment (UE) to UE relay, parameters for performing multicast UE to UE relay communication from a network or configuring the parameters by itself; supporting relay multicast traffic, wherein the support is directed to UE to UE relay or end user equipment; establishing a routing table based on a mobile ad hoc network routing message; and forwarding multicast traffic based on the routing table. The present disclosure realizes the sending of multicast traffic by supporting multicast traffic and configuring a routing table in user equipment to user equipment relay, and solves the problem of wireless traffic redundancy caused by regularly sending a copy of the same message through multiple proximity service direct link unicast.

This disclosure provides a method for multicast transmission of routing messages in proximity service relays, relating to the field of communication technology. The method includes configuring a multicast Internet Protocol (IP) address; establishing a connection between UEs supporting the same relay service code and UEs relaying the same UE; and uploading mobile ad hoc network (MAN) routing messages to the multicast IP address. This disclosure, by configuring a multicast IP address in a UE-to-UE relay and establishing a connection between UEs supporting the same relay service code and UEs relaying the same UE, achieves the uploading of MAN routing messages via multicast IP addresses, solving the problem of radio traffic redundancy during routing table generation / maintenance in proximity service multi-hop UE-to-UE relay communication.

The invention discloses an algorithm for optimizing routing by utilizing link prediction and route reconstruction in a mobile ad hoc network, aiming at solving the problems of delay, overlarge overhead, excessive number of failed routes and the like caused by continuous node movement, frequent link disconnection and continuous route reconstruction in a mobile Ad Hoc network AODV routing protocol. The invention provides an algorithm for optimizing a routing by utilizing link prediction and routing reconstruction in a mobile Ad Hoc network. According to the algorithm, a link state prediction mechanism is introduced, and the Newton mean difference interpolation polynomial is used for predicting the link disconnection time, so that the local route repair algorithm is started before the route fails, the route reconstruction is realized, and the algorithm has better performance in the aspects of route overhead, end-to-end delay, packet delivery rate and the like.

This invention discloses a dynamic topology optimization method for fire and rescue command and control networks based on mesh node state awareness. It relates to the fields of emergency communication and mobile ad hoc network technology for fire and rescue teams. The method includes mesh node state self-identification, collecting mesh node motion data and determining whether a node is stationary or moving using a lightweight sensor fusion algorithm; constructing static direct links to form a static backbone subnet; and adopting a hierarchical heterogeneous routing strategy: for each static backbone subnet, internally, a logical subnet coordinator is elected, a shortest path algorithm is run to construct static routes, and data forwarding is implemented. This invention fundamentally solves the problem of surging routing overhead and network congestion when traditional mesh networks expand, ensuring stable network performance in large-scale rescue scenarios with multiple nodes and wide coverage.

The application discloses a mobile ad hoc network dynamic routing method based on heterogeneous subgraph coding and decoding, and comprises the following steps: step 1, local subgraph construction; step 2, heterogeneous feature coding; step 3, graph attention message passing; step 4, neighbor level Q value decoding; step 5, action selection and environment interaction; step 6, experience replay; step 7, network training; and step 8, iterative training. Steps 1-7 are repeated until the network converges or the maximum training round is reached. The method is applicable to distributed routing decision in a high-dynamic topology environment of a mobile ad hoc network. The local subgraph is coded by using a graph neural network, and then the action selection is performed by using a neighbor level Q value decoding network, so that the self-adaptation to topology dynamics and action space changes is realized.

A preemptive dynamic range AODV route maintenance method based on link fracture prediction comprises the following steps: step 1, acquiring link state information; step 2, calculating the sustainable time of a link; 3, calculating the sustainable time of an effective link; step 4, calculating link risk parameters; 5, determining a dynamic restoration range; and step 6, performing preemptive routing maintenance based on execution. According to the method, on the basis of a traditional AODV protocol, a link fracture prediction mechanism and a dynamic range route repair strategy are introduced, and the method comprises the following steps that in the route maintenance stage, the link state is monitored, the link sustainable time is predicted, the dynamic link repair range is adjusted in a self-adaptive mode, and a preemptive route maintenance strategy is executed. According to the method, the link fracture trend can be predicted in advance, the repair range can be adaptively adjusted, the reconstruction frequency of global routing is reduced, the routing overhead is reduced, the network stability is improved, and the method is suitable for a high-dynamic mobile ad hoc network environment.

This invention provides a routing method for mobile ad hoc networks based on deep reinforcement learning, comprising: (1) exploring routing links through routing control packets using a dual deep Q-network model to obtain empirical data; (2) using the obtained empirical data as training data to train the dual deep Q-network model to obtain a trained dual deep Q-network model; (3) inputting the node of the data packet to be sent into the trained dual deep Q-network model to calculate the routing link, and transmitting the data packet according to the obtained routing link. On the one hand, neural networks can use more information as input, thereby expanding the state action space and facilitating the formulation of better strategies; on the other hand, neural networks can automatically extract hidden features from high-dimensional input data, effectively reducing the difficulty of manual feature extraction while obtaining the optimal end-to-end decision.

A mobile ad hoc network (MANET) radio system configured to send and receive data from a MANET network through multiple communication modes including an internal mode to communicate directly with the MANET network, a satellite mode to enable satellite communication and a cellular mode to enable cellular communication, and an external mode to exchange data with an external communication system. The MANET network includes many radio systems and each is configured to verify a connection with each other, and designate a selected radio system, determine an optimal communication path to the selected radio system. A communication path passes through an intermediate radio system, and communicates data to and from the selected radio system over the optimal communication path. The processor selects an optimal mode based on the strength and availability of each mode.

This application discloses a method for selecting data transmission paths in a mobile ad hoc network, comprising: acquiring observation information of any current node in the mobile ad hoc network; inputting the current observation information into a trained graph attention network model; obtaining the aggregated hidden features of the current node through inference by the graph attention network model; inputting the aggregated hidden features of the current node into a trained action network model; obtaining the next-hop node selected from the neighboring nodes of the current node through inference by the trained action network model; forwarding data to the selected next-hop node; and using the next-hop node as the current node until the data is sent to the destination node. This application improves the accuracy, reliability, and stability of path selection.

The invention provides a mobile ad hoc network and a synchronization signal adaptive frequency selection method thereof. A center node is used for determining whether a frequency hopping starting condition is satisfied according to a noise performance evaluation index of each first type of node under a current synchronization frequency point; when a frequency hopping starting condition is met, the central node is also used for controlling the mobile ad hoc network to perform adaptive frequency selection so as to determine a new synchronous frequency point and send the new synchronous frequency point to the first type of nodes; and the first type of nodes are used for sending the synchronization signal based on the new synchronization frequency point in the corresponding synchronization signal sending time slot. When the frequency hopping starting condition is not met, the synchronous frequency point is not interfered, and the current synchronous frequency point does not need to be changed, so that a new node can be quickly accessed to the mobile ad hoc network; and when the frequency hopping starting condition is met, the synchronous frequency point is interfered, the synchronous frequency point is updated, and the anti-interference performance of the mobile ad hoc network is improved.

This invention discloses a multi-path routing method and system based on location and path quality differences, belonging to the field of computer network routing technology. This method is an on-demand multi-path routing approach suitable for military mobile ad hoc networks. It utilizes latitude, longitude, and altitude information to map to three-dimensional coordinates, calculates the centroid deviation in space, and introduces a link reliability parameter (Lr) to measure path performance. This solves the problems of previous multi-path routing algorithms that did not consider local military strikes and differences in transmission path performance. Furthermore, this method analyzes relevant information to select one or more sub-flow paths for load balancing, thereby satisfying the throughput requirements of the service flow as much as possible without migrating other service traffic or changing the path bottleneck bandwidth, further reducing the impact of local military strikes on service flow transmission.

The invention relates to the technical field of mobile ad hoc network communication, in particular to a flight ad hoc network-oriented TDMA and SPMA hybrid multiple access protocol method, which is characterized by comprising the following steps of: establishing a hybrid network architecture which comprises a centralized part and a distributed part, the centralized part is responsible for time slot synchronization and resource allocation in a whole network range to support TDMA communication, and the distributed part is responsible for priority competition and dynamic resource adjustment in a local range to support SPMA communication; according to the method, a cooperative working mechanism of centralized scheduling and distributed competition is realized, a communication mode can be dynamically adjusted according to task priorities in a local range, so that the instantaneity and the flexibility of burst tasks are considered while the whole network communication certainty is ensured, and compared with a single protocol, the method has the advantages that the cost is reduced; the hybrid multiple access protocol shows lower average time delay under different load and task distribution conditions, so that the overall communication performance and task processing efficiency of the flight ad hoc network are effectively improved.

The invention belongs to the technical field of wireless communication, and particularly relates to an adaptive broadcasting method for an ad hoc network in a high-dynamic environment. According to the scheme, the network system comprises a high-dynamic mobile ad hoc network composed of k mobile nodes, the nodes operate under a synchronous time slot structure, and each node achieves neighbor discovery and link maintenance by periodically broadcasting HELLO messages. According to the method, optimization of neighbor discovery efficiency and energy consumption balance is taken as a target, and a dual-stage adaptive mechanism is adopted: rapid topological convergence is realized through fast / slow start dual-mode probability broadcast in an initial discovery stage, and an HELLO interval is dynamically adjusted based on link duration prediction and node density in a link maintenance stage. Compared with the prior art, the scheme of the invention can significantly improve the neighbor discovery efficiency in a high dynamic environment and reduce the system energy consumption without the support of a GPS (Global Positioning System).