17 results about "Frame (networking)" patented technology

The application provides a vehicle networking fairness transmission method based on convex optimization and reinforcement learning, and belongs to the technical field of vehicle networking and data transmission. The technical scheme is as follows: S1: an improved confirmation ACK frame and a data DATA frame are designed to realize hidden node detection; S2: mathematical modeling of the transmission fairness problem; S3: fairness transmission based on convex optimization and reinforcement learning. The application effectively discovers hidden nodes, alleviates transmission conflicts caused by hidden nodes by improving the transmission power and the 'continuation' field of the data frame DATA, and finally improves the throughput; the reinforcement learning and convex optimization method are used to jointly optimize the transmission strategy, solve the minimization problem of the difference between the transmission data amounts of fast and slow vehicles, and improve the data fairness of vehicle networking transmission.

The utility model relates to remote monitoring control technical field discloses a kind of remote monitoring control device for EIGA equipment, including total data processing mechanism, the end of total data processing mechanism is provided with probe mechanism, the probe mechanism includes frame component, the surface of frame component is connected with the end of total data processing mechanism, the inside of frame component is provided with self-cleaning component, the self-cleaning component includes outer extension cylinder, the surface of outer extension cylinder is provided with air hole, the inner wall of air hole is fixedly connected with dust baffle, the outer surface of outer extension cylinder is fixedly connected with helical rib, the inner wall of outer extension cylinder is rotatably connected with baffle. In the utility model, self-cleaning design reduces the interference of dust to monitoring, without disassembly cleaning, the layout of multiple probe multiple type monitoring element realizes multi-region multidimensional synchronous monitoring, hierarchical data processing and transmission mode according to demand networking, reduce data transmission volume and total control operation pressure.

The application relates to a vehicle networking intrusion detection method and system based on a mask strip convolution autoencoder, which comprises the following steps: converting payload bytes of continuous CAN data frames into a CAN payload grayscale image; generating a block level, frame level or continuous frame mask area and filling the same by using an information amount guided multi-mode mask generator; inputting the mask input image into a mask strip convolution autoencoder for self-supervised reconstruction training; the encoder extracts local byte disturbance, time direction continuous change and cross-field interframe coupling features through a strip convolution module facing the CAN frame structure; calculating a reconstruction loss taking the masked area as a main object and updating parameters; removing the decoder after training, retaining the encoder and connecting a lightweight classification head; and outputting an intrusion detection result by the encoder and the classification head in the deployment stage; the application reduces the dependence on labeled data, enhances the robustness to frame loss, noise and continuous abnormal injection, and meets the lightweight deployment requirements of a vehicle-mounted edge device.

This invention discloses an AFDX switching system supporting standard Ethernet bridging, comprising: an ARINC664 / ETH converged receiving module, an AFDX switch control module, a virtual link aggregation module, a redundant network management and deduplication module, a high-speed cross-matrix routing module, and an ARINC664 / ETH protocol encapsulation and transmission module. This system achieves efficient switching within the AFDX network and transparent bridging switching with standard Ethernet by performing ARINC664 / ETH protocol message fusion extraction, virtual link bandwidth management, redundant frame arbitration and filtering, virtual link-based cross-matrix routing, and cross-ARINC664 / ETH protocol fusion encapsulation and transmission. While ensuring the deterministic service characteristics of the AFDX network, this system features high bandwidth, low latency, and flexible access, improving the networking quality of airborne heterogeneous networks.

This invention provides a device collaborative control method, device, and apparatus based on time-sensitive networking (TSN), belonging to the field of industrial automation control and communication network technology. The method includes: constructing a three-level TSN architecture consisting of a central control layer, a regional access layer, and a device terminal layer; using a TSN protocol and a central controller as the main clock source, performing time synchronization among all nodes in the three-level TSN network; dividing the network communication cycle into multiple time slots, and allocating dedicated deterministic transmission windows for service traffic of different priorities through the gated list control of the TSN access switch; performing frame duplication operations on key control commands to generate at least two identical data frames; and transmitting the duplicated data frames in parallel to the target device terminal through different physical links. The target device terminal receives and eliminates redundant frames before executing the command. This method solves the problem of low accuracy in device collaborative control based on TSN.

This invention relates to a tree-structured wireless communication network and a complete signaling method, belonging to the field of wireless communication networking technology. It constructs a wireless communication network based on a combination of explicit tree and implicit mesh structures, clearly defining the dedicated wireless communication frame structure and the specific parameters and functions of its synchronization and broadcast channels SYNC / BCCH, grant channel AGCH, and indication channel indCH. Different node devices in the system use independent operating frequencies. The wireless resources of each node device are divided into local resources and relay forwarding resources: local resources are used to provide access services for mobile terminals residing at the node, and relay forwarding resources are used to forward data from lower-level child nodes. The invention also defines the tree-structured networking process, the calling party communication process, the called party communication process, and the inter-node measurement and terminal handover process, forming a complete networking and communication solution.

A communication method and device. In the method, a CCO generates and sends a first beacon frame, wherein the first beacon frame includes indication information of a first CSMA time slot, the time slot indication information of the first CSMA includes type indication information, and the type indication information is used to indicate whether the first CSMA time slot can be used to transmit a first type of physical layer frame (i.e. a physical layer frame defined in a new protocol version). Nodes supporting the first type and nodes supporting a second type (i.e. an old protocol version) can determine whether to compete for the channel in the first CSMA time slot according to the indication of the first beacon frame, avoiding the possibility that nodes not supporting the first type may occur data conflict in the first CSMA time slot due to the inability to correctly parse the first type of physical layer frame sent by other nodes, thereby realizing that new and old protocol nodes can be mixed in networking without upgrading all nodes in the network to support the first type, wasting manpower and resources.

The present application relates to the field of industrial wireless communication and automation control, in particular to a multi-master-slave multi-listening weighing communication networking method and system, comprising: obtaining data load to be distributed, generating a mixed broadcast frame with specific transmission permission indication; opening a preset time length instruction receiving window; extracting the dynamic authorization token field and the local identifier for matching verification; in response to the dynamic authorization token field matching the local identifier, and there being a to-be-sent instruction in the instruction cache queue of the slave communication node, triggering the uplink instruction transmission process after a preset radio frequency protection time gap; in response to the dynamic authorization token field not matching the local identifier, or the instruction cache queue being empty, the slave communication node maintains a radio frequency transmission silent state within the instruction receiving window; the present application effectively solves the hidden terminal problem in the wireless network, reduces the physical layer collision probability to zero, and significantly improves the communication link robustness in a complex electromagnetic environment.

The application discloses a data transmission method, a nonvolatile storage medium and a computer device. The method comprises the following steps: receiving a first target frame sent by a first device, wherein the first target frame carries target data, the first device is located on a path for transmitting the target data, and the first device belongs to a slice packet network or an optical transport network; modifying a field included in the first target frame to obtain a second target frame corresponding to an intermediate device, wherein the intermediate device is located between the first device and a second device, the second device is located on the path for transmitting the target data, the second target frame carries the target data, the second device belongs to the slice packet network or the optical transport network, and the first device and the second device belong to different networks; and sending the second target frame to the second device to forward the target data from the first device to the second device. The application solves the technical problem that a long transmission time is required when data is transmitted in a transmission path formed by combining multiple networking modes.

The present application relates to the technical field of power system, specifically to a simulation isolated substation remote control target equipment checking method, comprising receiving a remote control message, extracting a frame start identifier, an ASDU type identifier and an application identifier to construct a protocol feature vector, the method extracts a pre-training classification model through the protocol feature vector, realizes the automatic identification and unified analysis of IEC60870-5-103 / 104 and IEC61850 multi-protocol, and solves the mixed networking acceptance problem; with the help of virtual equipment model normalization heterogeneous operation, combined with state transition path modeling and dynamic time warping algorithm, the quantitative evaluation of remote control timing logic is realized, and the timing error that cannot be found by traditional static checking is accurately identified. At the same time, the logic isolation and simulation feedback mechanism ensures the safe verification without power failure, and the context association verification of the logic topology graph ensures that the logical association configuration error between devices can be found, forming a full-dimensional verification system of target correctness, timing consistency and logical association, and improving the systematicness and reliability of acceptance.

The application discloses an adaptive unmanned cluster MAC layer hybrid networking method, and belongs to the wireless communication technical field. The application solves the problems that the existing method is difficult to adapt to the dynamic change of the node quantity, the time slot is difficult to allocate when the node quantity is large, and congestion conflict and channel resource waste are easily generated frequently when the communication traffic of part of nodes is large. The application designs a protocol frame structure, a part of time slots in the protocol frame structure is designed as a dynamic competition window, and the other part of time slots is set as fixed time slots. In the initialization stage, the node accesses the network through the competition window, and the priority of the accessed node is allocated, the priority is dynamically adjusted according to the network congestion degree of the node in the network running process, the high-priority node can be allocated to the fixed time slot and has higher competition priority in the competition window, and the low-priority node participates in the time slot competition in the competition window, and then the business data receiving and transmitting are carried out after the competition is successful. The method can be applied to the wireless communication technical field.

This invention provides a circular queuing and forwarding method based on shadow queues to absorb time variations, relating to the field of time-sensitive networking technology. The method includes: S1, filtering data frames that meet real-time service conditions; S2, combining the arrival time of the data frame, the global synchronization clock, and the period offset, controlling the gating time window opening and closing state of the sub-queue to be delayed relative to the main circular queue, and selecting a target queue to receive the data frame; S3, generating period tags for the data frames in each target queue; and S4, sending the data frame based on the period tags. This invention, based on the circular queuing and forwarding mechanism, introduces a shadow queue composed of two sub-queues, and sets the gating time window opening and closing state of the sub-queue to be delayed relative to the main circular queue. This allows the sub-queue to receive delayed data frames and catch up with normally arriving data frames when sending data frames, thus ensuring that the data stream is transmitted within a precise time period.

The single carrier high-precision two-way ranging method based on orthogonal waveform design belongs to the field of communication signal processing.The method of the present application is as follows: in the scene where the frequency spectrum and hardware implementation resources are strongly limited, a UAV node generates information according to a ranging frame structure.The frame structure comprises a pilot head, a frame synchronization head, a control field, ranging information, inertial navigation and dynamic information, and other redundant information. By using coherent pilots orthogonal to communication signals, combined with a two-way comparison algorithm and pilot phase discrimination, high-precision and low-processing-delay networking ranging is realized.The present application has the following advantages: (1) the orthogonal waveform is used to save spectrum resources without affecting the communication and ranging performance; (2) on the basis of simple pseudo-code ranging, the ranging result is corrected by using the phase discrimination method, which significantly improves the ranging accuracy and has low processing complexity and processing delay; (3) combined with the expandable two-way comparison strategy, networking ranging of large-scale UAV clusters is realized.

The application relates to the technical field of communication, in particular to a time division multiplexing frequency hopping Mesh network networking method and device, electronic equipment and medium. When a new node is powered on and not synchronized, whether a first beacon frame broadcast by a master node is received in a preset period is listened to; if the first beacon frame is received, time slot allocation and frequency hopping sequence parameters are analyzed and extracted, and a clock is calibrated; after the calibration is completed, the new node sends a network access confirmation frame, the master node adds the new node to the network and generates a node list. The new node and the master node are continuously monitored during operation. The application effectively solves the problem of same frequency interference of multi-hop concurrent transmission, reduces the requirement for hardware precision, reduces the influence of the protection time slot on the communication time, and improves the channel utilization rate and the network capacity.

This invention discloses a method and system for cooperative ultraviolet (UV) optical networking based on dynamic time slot allocation, belonging to the field of free-space optical communication and networking technology. The networking method includes communication between nodes based on a pre-constructed frame structure framework, and employs a pre-constructed synchronization mechanism to ensure frame synchronization between nodes. The pre-constructed frame structure framework includes synchronization subframes, notification subframes, and data subframes. The notification subframes contain corresponding mapping information between active nodes and data subframes, and the data subframes contain several data time slots. Corresponding active nodes alternately occupy the data time slots according to the corresponding mapping information. By constructing a frame structure framework that enables dynamic time slot allocation, the advantages of synchronous communication and dynamic time slot allocation are simultaneously achieved during UV network node communication, based on this frame structure framework and synchronization mechanism, thus improving both network stability and channel utilization.

The application provides a vehicle networking fairness transmission method based on convex optimization and reinforcement learning, and belongs to the technical field of vehicle networking and data transmission. The technical scheme is as follows: S1: an improved confirmation ACK frame and a data DATA frame are designed to realize hidden node detection; S2: mathematical modeling of the transmission fairness problem; S3: fairness transmission based on convex optimization and reinforcement learning. The application effectively discovers hidden nodes, alleviates transmission conflicts caused by hidden nodes by improving the transmission power and the 'continuation' field of the data frame DATA, and finally improves the throughput; the reinforcement learning and convex optimization method are used to jointly optimize the transmission strategy, solve the minimization problem of the difference between the transmission data amounts of fast and slow vehicles, and improve the data fairness of vehicle networking transmission.

The application relates to a multi-port networking device which comprises a networking device body and a dustproof abutting assembly; the networking device body comprises a plurality of connection ports arranged side by side, the networking device body is provided with a mounting frame on one side provided with the plurality of connection ports, and the dustproof abutting assembly is arranged on the mounting frame; the dustproof abutting assembly comprises an elastic piece and a blocking limiting piece, one end of the elastic piece is abutted on the mounting frame, and the other end of the elastic piece is abutted with the blocking limiting piece; the blocking limiting piece is slidably arranged on the mounting frame and blocks the plurality of connection ports. By designing the blocking limiting piece to be slidably arranged on the mounting frame, dust is effectively prevented from entering the unused connection ports, the abutting effect of the connection ports is enhanced, port loosening after long-time use or frequent plugging is prevented, and the problem that dust is attached to pins when the connection ports are not connected with external device connection terminals and the problem of port loosening after long-time use or excessive plugging are solved.