1366 results about "Transmission performance" patented technology

The invention discloses a layout method of a printed circuit board, a product, equipment and a readable storage medium, and relates to the technical field of PCB design, and the method comprises the steps: carrying out the optimization decoupling and optimization separation of a position layout and a rotation angle into independent stages of sequential execution, avoiding the mutual interference of two types of decisions, greatly reducing the search space, and improving the convergence efficiency. After newly-added elements are placed every time, all the placed elements on the current board are subjected to rotation optimization, the accumulated influence of default direction deviation of early-stage elements on subsequent layout is eliminated, the optimal solution is gradually approached through multi-round iteration, the total length of a finally-arranged wire net is reduced, the signal transmission performance of the PCB is remarkably improved, and the reliability of the PCB is improved. Therefore, the problem of irreversible influence of early decision on subsequent layout is solved, and the beneficial effects of improving layout quality and optimizing PCB circuit performance are achieved.

The invention discloses a zero-copy data transmission method and device, a medium and a product, and belongs to the technical field of data transmission, and the method comprises the steps that an application program requests a memory buffer area from a kernel module; the kernel module allocates a physical memory buffer area according to the request, and returns a specially designed descriptor (including a handle corresponding to an address pointer); the application program submits a descriptor to the kernel module and requests an address pointer of the memory buffer area; after the kernel module verifies the descriptor, the physical memory buffer area is mapped to a virtual address space of the application program, and a corresponding address pointer is returned; the application program writes data needing to be sent according to the address pointer, and after writing is completed, the descriptor is submitted to the kernel module and the written data is requested to be sent; after the kernel module verifies the descriptor, a DMA controller is configured and started, and the written data is directly read from the physical memory buffer area and pushed to a network card to be sent. According to the invention, the security and certainty can be improved while the transmission performance is ensured.

The invention discloses an eBPF-based kernel optimization method, system, equipment and medium, belongs to the technical field of Linux kernel network optimization, and aims to solve the technical problem of how to improve the transmission performance for a specific data stream and specify the data stream to carry out a special routing and transmission process so as to provide services for a special network adapter and improve the transmission performance of the specific data stream. According to the technical scheme, the method comprises the steps that data packet interception is carried out on a plurality of kernel eBPF loading points and program interception points selected by a user through an eBPF kernel hook program, routing query is carried out with a routing kernel module, and selection of an operation function and routing parameters is completed; the routing kernel module completes a routing decision based on various complex routing requirements, configuration conditions, data packet conditions and environment conditions, and returns a query result to the eBPF kernel hook program, and the query result is executed by the eBPF kernel hook program. The system comprises an eBPF user mode management program module, a user mode control tool, an eBPF kernel hook program module and a routing kernel module.

The invention provides a data processing priority scheduling method for high-speed satellite communication and related equipment, which can effectively improve the transmission performance of a high-speed satellite communication system so as to adapt to differentiated requirements of various communication scenes. The method comprises the following steps: acquiring cross-layer state information; calling a strategy matrix, wherein the strategy matrix is used for defining weight coefficients of different data types under different network states and channel qualities; calculating a target priority score for the to-be-transmitted data stream according to the cross-layer state information and the strategy matrix; sequencing the target priority scores from high to low to obtain a sequencing result; scheduling transmission queues of the data streams for transmission according to a sorting result, and allocating cache transmission queues for the data streams with high priority scores; when it is monitored that the priority score of the new data stream exceeds a preset emergency threshold value, the new data stream is inserted into a cache transmission queue of the transmission queue, and back pressure control is carried out on data streams of other priorities.

The invention relates to the technical field of intelligent substations, in particular to a rapid detection system, method and equipment for a process level switch of an intelligent substation, and aims to solve the problem that existing detection only depends on network transmission performance indexes and cannot comprehensively evaluate the business function correctness and operation reliability of the switch. The system, the method and the equipment comprise a power system fault scene modeling and message generation unit, a high-precision synchronous message injection and capture unit, a multi-dimensional state association and comprehensive judgment unit and a diagnosis report generation unit. According to the scheme, comprehensive detection, high-fidelity scene and deep diagnosis are realized, and service reliability determinacy evaluation is provided.

According to the automatic driving data transmission scheduling method and device, the equipment and the readable storage medium, dynamic priority weights are generated in a mode of combining reinforcement learning and a rule engine, and bandwidth demand changes, historical transmission performance and queue occupation states of all sensors can be adapted in real time; the problem that a low-priority sensor cannot acquire the bandwidth at a high load is effectively avoided, and meanwhile, efficient utilization of bandwidth resources can be realized through dynamic weight adjustment when a high-priority sensor is idle, so that the bandwidth utilization rate in a vehicle-mounted multi-sensor data transmission process is remarkably improved; the real-time performance and reliability of data transmission required by automatic driving decision making are guaranteed, and then the overall performance of an automatic driving system is improved.

The invention provides a dynamic adaptive encryption protocol selection mechanism. The mechanism comprises a network condition monitoring module, a data sensitivity evaluation module, an encryption protocol dynamic selection module and a performance feedback adjustment module. Indexes such as network bandwidth and delay are monitored in real time, and the network condition is evaluated; evaluating a sensitivity level of the data to be transmitted; dynamically selecting the most suitable encryption protocol from the encryption protocol library according to the network condition and the data sensitivity; encrypting and transmitting data by using the selected encryption protocol; and monitoring the transmission performance, and adjusting an encryption protocol selection strategy according to feedback. The method can automatically judge network and data conditions, dynamically select an encryption protocol, optimize network performance and resource utilization efficiency on the premise of ensuring data security, improve transmission efficiency and reduce calculation overhead, and has the advantages of automation, security, performance optimization, efficient resource utilization and the like; the method is suitable for the field of network communication with high requirements for safety and performance.

The embodiment of the invention provides a congestion control method and device, an RDMA network card and electronic equipment, and is applied to the RDMA network card of a sending end, and the method comprises the steps: responding to the received WQE, and based on the current sending rate, sending a data packet to a receiving end through an RDMA communication link; transmission performance characterization information of the RDMA communication link in a time window is determined, the transmission performance characterization information comprises the minimum round-trip time and the maximum transmission bandwidth, and the time window is set based on the determined last minimum round-trip time; updating the current sending rate based on the transmission performance characterization information; and sending the data packet to the receiving end through the RDMA communication link based on the updated current sending rate. By applying the scheme provided by the embodiment of the invention, the packet loss rate during data transmission between equipment based on the RDMA technology can be reduced.

The invention relates to the technical field of antenna control, and discloses a control method for a leaky-wave antenna and a communication device. The method comprises the following steps: measuring the dispersion characteristic of the leaky-wave antenna, establishing a second-order nonlinear mapping relation between a propagation constant and a control voltage, and obtaining a dispersion control parameter group; reversely deducing the target beam directional angle to obtain a target propagation constant, and calculating an initial voltage value of each control unit in combination with the parameter group to form a voltage gradient control sequence; correcting the propagation constant of each unit by adopting a distance compensation algorithm, and recalculating to obtain distance self-adaptive voltage distribution data; and detecting a beam quality factor in real time, updating voltage distribution data through a gradient descent algorithm when the beam quality factor deviates from a target value, and outputting a control voltage sequence to drive each control unit. The leaky-wave antenna control method and device solve the problems that in an existing leaky-wave antenna control technology, the beam quality is reduced and the data rate is sharply attenuated during long-distance transmission, and the beam control precision and the long-distance transmission performance of the leaky-wave antenna in the terahertz frequency band are improved.

The invention discloses a cloud edge cooperative multi-channel converged communication control method and system, belongs to the technical field of wireless communication networks, and aims to improve the high efficiency, reliability and real-time performance of multi-channel converged communication in a complex scene. The method specifically comprises the following steps: constructing a hierarchical collaborative architecture of a cloud end and an edge end; the edge end collects network state parameters of various communication channels, outputs a channel quality evaluation value based on a time sequence prediction model, and performs multi-channel data transmission through an extended communication protocol when triggering channel switching; the edge end executes network parameter configuration, flow priority scheduling and running state data acquisition operation, and the cloud end generates a soft routing optimization instruction based on running state data and issues the soft routing optimization instruction to the edge end to execute and adjust network transmission performance parameters; and monitoring the container operation state and the equipment state of the edge end in real time, when a monitoring result is matched with a preset abnormal rule, generating alarm information by the edge end, returning the alarm information to the cloud end to generate a global security policy, and issuing the global security policy to the edge end to update the preset abnormal rule.

The invention discloses a cache, a control chip, a debugging method and an upper computer. The cache is connected between a central processing unit and a bus, the bus is also connected with a memory, the central processing unit works at a first frequency, the bus and the memory work at a second frequency, and the first frequency is greater than the second frequency; the cache comprises at least one cache block, any one cache block is used for storing any one data block in at least one data block in the memory, the cache block and the data block are the same in size, each cache block is divided into at least two cache sub-blocks, and each cache sub-block is divided into at least two cache sub-blocks; the at least two cache sub-blocks in the cache block and the at least two data sub-blocks in the data block are in one-to-one mapping. According to the invention, the transmission performance and the power consumption between the central processing unit and the bus are balanced, and the utilization rate of the cache is improved.

The invention relates to the technical field of intelligent detection of board cards, in particular to a multichannel board card detection method and system, electronic equipment and a storage medium. The detection method comprises the following steps: inputting a standard test signal to each channel of the multi-channel board card in a normal environment, analyzing the output signal accuracy, the signal triggering time punctuality and the anti-crosstalk level of adjacent channel pairs, and judging the signal transmission performance; when the signal transmission performance is qualified, environments with different temperatures and vibration conditions are simulated, testing is repeated, performance data in the normal environment and performance data in the simulated environment are compared, and an applicable environment set is determined; and comparing with a corresponding allowed use environment set, and judging the environment adaptation performance. The anti-crosstalk capability quantitative detection and multi-environment adaptation evaluation of the multi-channel board card are realized, so that the signal independence of the multi-channel board card is ensured, the system operation stability is improved, and the reliability of the board card in a complex scene is ensured.

A broadband low-transmittance and high-absorption wave absorption and transmission integrated frequency selection surface comprises three wave absorption layers and two wave transmission layers which are sequentially stacked from top to bottom, and the three wave absorption layers are sequentially divided into an upper wave absorption layer, a middle wave absorption layer and a lower wave absorption layer from top to bottom; the two wave-transparent layers are sequentially divided into an upper wave-transparent layer and a lower wave-transparent layer from top to bottom; the multi-layer composite structure design is adopted, collaborative optimization of the wave absorbing performance and the wave transmitting performance is achieved by combining the two wave transmitting layers on the lower portion and the three wave absorbing layers on the upper portion, through organic combination of the upper layer structure and the lower layer structure, dual performance improvement of broadband wave absorbing and broadband wave transmitting is achieved, and a transition zone between a wave absorbing zone and a wave transmitting zone is greatly reduced.

The invention relates to the technical field of coal mine automation control, and discloses a coal flow windscreen wiper multi-device cooperative control method and system. The method comprises the following steps: obtaining an original environment data set of each sensor node in an underground environment, processing the original environment data set to obtain a communication quality index, calculating bandwidth demand change of each node in combination with historical transmission records of the nodes, and predicting a resource allocation proportion; when the current available network resources cannot meet the requirements, sorting the key data packets to obtain a priority transmission sequence; extracting high-priority data from the sequence, temporarily storing the high-priority data to a local cache unit, and determining the state of a buffer area; dynamically adjusting bandwidth allocation by adopting an intelligent optimization model, and updating communication resource configuration; and judging whether the resource configuration meets a load balance requirement, if so, sending a data packet through a wireless channel, determining a transmission performance index, and generating a resource management scheme of a next period. The cooperative work efficiency of multiple devices of the coal flow windscreen wiper in the high-dust and high-humidity environment is improved.

The invention provides a computer cross-scale integrated analysis method based on a multi-physics field coupling mechanism, and the method comprises the steps: constructing a multi-level finite element model from a system level to a micro-area level, and integrating thermal-mechanical-electric coupling modeling; therefore, the technical problems that in a traditional method, multi-physics field coupling lacks, local area modeling is not fine, and electrical performance evolution is not introduced are solved, high-precision simulation of a typical device failure mechanism is achieved, and the method is suitable for device packaging reliability evaluation in special electronic systems such as military and high-reliability civil use and the like. The method can be widely popularized in microelectronic structures such as a power supply module, a processor and a memory, and can improve the evaluation precision of the high-frequency signal transmission performance of complex electronic equipment, thereby improving the precision of predicting the service life.

The invention relates to the technical field of communication, in particular to an intelligent selection and switching method and system for power line broadband carrier communication channels. According to the method, the multi-modal channel quality basic data including the signal quality modal data, the transmission performance modal data and the interference characteristic modal data are introduced, and a scoring mechanism of the signal stability, the transmission efficiency and the anti-interference capability is combined, so that the comprehensive evaluation precision of the power line communication channel quality is effectively improved; real-time communication state information of upstream and downstream equipment is dynamically obtained through a feedback link, a channel quality score is optimized and corrected, and a communication demand matching degree is comprehensively considered, so that the intelligence and the adaptive capability of channel selection and switching are further improved, and therefore, a comprehensive evaluation index of a communication channel can be monitored in real time, and the communication efficiency is improved. The optimal communication channel is automatically selected or switched according to the evaluation result, so that the stability of the communication quality and the transmission efficiency are ensured, and the reliability of the power line broadband carrier communication system is effectively improved.

The invention relates to a movable disc pay-off system with a precise tension control function and a using method thereof, and belongs to the technical field of cable manufacturing equipment. The movable disc pay-off system comprises a rack, a tension system arranged on the rack, a winding displacement system, a centering device, a movable disc pay-off system and a control host; the tension system comprises a servo motor, a tension swing rod, a tension wheel, a balancing weight, a limiting roller, a tension detection guide wheel and a tension detector, an output shaft of the servo motor is in transmission connection with the tension wheel through the tension swing rod, the conductor sequentially bypasses the tension wheel and the tension detection guide wheel of the centering device to form an S-shaped path, and the tension detector is a wheel type pressure sensor. And the bearing seat is arranged on the tension detection guide wheel. According to the invention, high-precision tension control can be realized, the torque is dynamically adjusted through a closed-loop control algorithm and a servo motor according to the feedback of a tension detector, constant-tension pay-off is realized, stretching or outer diameter fluctuation of a superfine conductor is prevented, and the quality consistency and transmission performance of the cable are ensured.

The invention relates to a communication method, equipment and a storage medium. The method comprises: determining that a first channel state information (CSI) report collides with a second CSI report, and not sending a third CSI report, the third CSI report being a CSI report with a high priority value in the first CSI report and the second CSI report. In other words, the terminal equipment does not send the CSI report with the high priority value, namely the CSI report with the low priority value, so that the CSI report with the high priority can be sent in time, and the joint transmission performance of the multi-TRP is improved.

The invention discloses a three-dimensional 16QAM constellation diagram based on geometric shaping and a digital communication method, and relates to the field of communication, in a three-dimensional space, 16 constellation points are distributed on the surface of a three-dimensional sphere with the radius of 2.5, and 8 constellation points are distributed on each of the upper hemispherical surface and the lower hemispherical surface; a regular pentagon parallel to the XOY plane is formed by five constellation points in the upper hemispherical surface, the center of the regular pentagon coincides with the projection of the sphere center on the XOY plane, and one edge of the regular pentagon is parallel to the XOZ plane; the other three constellation points form an equilateral triangle parallel to the XOY plane, the center of the equilateral triangle coincides with the projection of the sphere center on the XOY plane, and the vertical bisector of one edge of the equilateral triangle is parallel to the YOZ plane; and rotating the eight constellation points of the upper semi-spherical surface by 180 degrees along the center of the sphere in the direction parallel to the YOZ plane to obtain the distribution of the constellation points of the lower semi-spherical surface. According to the method, the channel noise tolerance and the overall transmission performance of the system are improved, the bit error rate is reduced, and the method has an important application prospect in a high-tolerance and high-performance transmission system.

The invention provides a link determination method and device, electronic equipment and a storage medium, and relates to the field of mobile communication. The method comprises the following steps: determining a target service type corresponding to service data of a terminal; determining a first prediction result based on the terminal state parameter and the network performance parameter of the first link, the first prediction result being used for indicating the transmission performance which can be reached when the first link transmits the service data of the target service type; determining a second prediction result based on the terminal state parameter and the network performance parameter of the second link, the second prediction result being used for indicating the transmission performance which can be reached when the second link transmits the service data of the target service type; and determining a target link from the first link and the second link based on the first prediction result and the second prediction result. According to the application, the selected target link can meet the service requirement of the target service type, so that the network service quality can meet the service requirement.

The invention discloses a high-transmission-rate optical cable with a low attenuation characteristic and a preparation method thereof, belongs to the technical field of optical cable communication, and is used for solving the technical problem that the transmission performance and the mechanical performance of an optical cable in the prior art need to be further improved. According to the optical cable, the polytetrafluoroethylene is filled with the modified graphene and the molybdenum disulfide, so that the mechanical property and the environmental adaptability of the optical cable are effectively improved, and the transmission speed of the optical cable is also effectively improved.

The invention discloses an autonomous management method for an optical network, and the method comprises the steps: collecting the physical layer state data of an optical channel through a plurality of sensing nodes in an optical transmission system; synchronizing the physical layer state data to a digital twin, and constructing and updating virtual mapping corresponding to the physical optical transmission system; in the digital twin, the transmission performance of the optical channel is evaluated and the future state of the optical channel is predicted based on the physical layer state data; according to the autonomous management method and system of the optical network provided by the embodiment of the invention, the operation and maintenance efficiency can be effectively improved by constructing an intelligent network management closed loop, and the manual intervention demand is reduced. The system has a prospective risk assessment capability, can avoid potential faults in advance, and significantly enhances the reliability of network operation. Meanwhile, the resource utilization efficiency is continuously improved through an autonomous optimization mechanism, and a powerful guarantee is provided for long-term stable operation of the optical network.

The invention provides a differentiated gating and resource reservation method and device for a 5G-TSN system. The differentiated gating and resource reservation method and device for the 5G-TSN system are used for solving the problem that end-to-end deterministic transmission performance cannot be guaranteed due to wireless air interface fluctuation and service competition in a 5G and TSN fusion network. The method comprises the following steps: a TSN controller identifies key network resources, performs gating compression and phase offset processing on the key network resources, generates an end-to-end plan containing a TSN stream expected transmission time slot, and sends the end-to-end plan to a 5G base station; after receiving, the base station reserves a protection TTI and pre-configures a resource block in TTIs outside the planned time slot; and when transmission abnormity occurs in the planned time slot, immediately starting the resource block to carry out remedial transmission on the TSN flow. According to the scheme, through cross-domain collaborative differentiated scheduling and redundant resource reservation, the end-to-end delay and jitter are remarkably reduced while the resource utilization efficiency is improved, and a reliable deterministic transmission guarantee is provided for high-priority services.

The invention discloses a rectangular waveguide sealing window structure for realizing broadband transmission, which belongs to a microwave signal detection device and comprises a first rectangular waveguide cavity, a second rectangular waveguide cavity and a rectangular dielectric block arranged between the first rectangular waveguide cavity and the second rectangular waveguide cavity, the first rectangular waveguide cavity comprises a first rectangular waveguide shell and two first stepped transition structures embedded into an inner cavity of the first rectangular waveguide cavity, and the second rectangular waveguide cavity comprises a second rectangular waveguide shell and two second stepped transition structures embedded into the second rectangular waveguide shell. The opposite side faces of the two first stepped transition structures and the two second stepped transition structures are provided with identical tooth-shaped steps, the second rectangular waveguide shell is further internally provided with an installation cavity communicated with the second I-shaped sliding groove, the two waveguide cavities are connected through screws, and the rectangular dielectric block is fixedly installed in the installation cavity. The vertically symmetrical multi-stage stepped impedance matching network provided by the invention realizes excellent transmission performance with low voltage standing-wave ratio in a wide frequency band, and is suitable for a millimeter wave system with high power and wide frequency band.

Methods and apparatus of monitoring artificial intelligence (AI) model in radio access network (RAN) are disclosed. The apparatus includes a receiver that receives a first configuration signalling for monitoring performance of one or more Artificial Intelligence (AI) models that are activated, and a second configuration signalling for reporting a result of the performance monitoring; a processor that generates a performance report of the AI models according to the first configuration signalling and the second configuration signalling; and a transmitter that transmits the performance report.

The invention relates to a multi-UAV cooperative beam and track design method and device and a security communication transmission system, and the method comprises the steps: obtaining an overall security secrecy rate expression of a target system; setting an optimization constraint condition of the target system; according to the security secrecy rate expression and the optimization constraint condition, constructing a joint optimization problem which takes the maximization of the overall secrecy rate capacity of the target system as a target function; and solving the optimization problem to obtain the optimal beam forming and unmanned aerial vehicle trajectory design of the target system. According to the technical scheme, through the multi-UAV cooperative beam and trajectory design method and device and the security communication transmission system, collaborative optimization of beam forming and unmanned aerial vehicle trajectories can be achieved, signal energy waste and local optimization of the secrecy rate are avoided, it is guaranteed that the eavesdropper positioning mean square error reaches the standard, and the security communication transmission efficiency is improved. And the endurance and transmission performance of the unmanned aerial vehicles in a multi-unmanned aerial vehicle communication scene are balanced.

The invention discloses a cross-domain information distribution method and system for multi-link cooperative networking, and relates to the technical field of network communication, and the method applied to an information sending end comprises the following steps: obtaining a link quality prediction result of each data transmission link based on the computing power level of an information receiving end and the link quality prediction result of each data transmission link; and dynamically selecting a main transmission path and at least one backup path of cross-domain information from all data transmission links. And based on the link quality of the main transmission path, performing fragmentation processing and coding processing on the to-be-distributed data to obtain a plurality of to-be-distributed data packets. And transmitting the to-be-distributed data packet to an information receiving end through the main transmission path and the backup path, so that the information receiving end decodes and recombines the to-be-distributed data packet. According to the method, the stability, the real-time performance and the resource utilization efficiency of cross-domain information distribution for multi-link cooperative networking are effectively improved, and the transmission performance of cross-domain data transmission is remarkably improved.

The invention discloses a downlink precoding method and device, electronic equipment, a storage medium and a program, and is applied to a sending end, the method comprises the following steps: obtaining communication configuration information, and determining an average interference power leakage coefficient of different users on scheduled subcarriers according to the communication configuration information; determining an average channel power and an array response vector of each user based on the communication configuration information; according to the average interference power leakage coefficient, the average channel power and the array response vector, determining a downlink precoding vector of each user according to an average signal leakage noise ratio maximization criterion; and obtaining a downlink transmission signal of each user, and performing weighting processing on the transmission signal of each downlink user according to the downlink precoding vector of each user, thereby obtaining a downlink transmission signal corresponding to each downlink transmission beam. According to the embodiment of the invention, the problem of asynchronous interference among different users in the mobile phone direct connection satellite communication system can be solved, and the downlink transmission performance of the multi-beam satellite mobile communication system can be improved.

The invention discloses an emergency communication system and method, and belongs to the field of emergency communication. The emergency communication method comprises the following steps of: acquiring a link performance parameter of a satellite communication link associated with an adjacent station node; based on the state information and the satellite communication link state of the local station node, executing at least one of the following scheduling operations on the service data: determining a first transmission performance index for transmitting data through the satellite communication link of the local station node, determining a first transmission performance index of a composite path from a wireless ad hoc network to the adjacent station node based on the state information, determining a second transmission performance index of a composite path from the wireless ad hoc network to the adjacent station node and transmitting data through a satellite communication link of the adjacent station node based on the state information, and selecting a forwarding path according to a comparison result of the first transmission performance index and the second transmission performance index; or, when the flow of the data to be transmitted meets the preset bandwidth aggregation condition, dividing the data to be transmitted into the first data part and the second data part.

A communication method and apparatus, which relate to the technical field of communications, and can improve the transmission performance while reducing the area of an interleaver / de-interleaver. The method comprises: when a rate matching length E corresponding to a first sequence is greater than X, on the basis of X, performing rate matching on the first sequence, so as to obtain a second sequence having a length of X; performing channel interleaving on the second sequence, so as to obtain a third sequence having a length of X; performing channel bit repetition on the third sequence, so as to obtain a fourth sequence having a length of E; and sending the fourth sequence to a receiving-end device, wherein both E and X are positive integers.