268 results about "Transmission time delay" patented technology

The invention relates to the technical field of network time delay scheduling, and discloses a deterministic network time delay scheduling method and device based on a TSN and a storage medium. The method comprises the following steps: carrying out graph theory analysis on a TSN network topology structure to obtain a network node connection relationship and link bandwidth information; extracting time delay requirements and bandwidth requirement characteristics of the data streams, and generating a data stream priority queue and a resource requirement index matrix; inputting a deep Q network, establishing a state-action mapping relation including a network load state and a time slice distribution action, and generating an initial time delay scheduling strategy model; calculating queuing time delay, transmission time delay and processing time delay of each data stream, and generating a time slice resource redistribution scheme; generating a global resource allocation matrix based on the time slice resource reallocation scheme; and parameter feedback updating is carried out on the initial time delay scheduling strategy model to obtain a target time delay scheduling strategy model, and the utilization efficiency of network resources is remarkably improved through bandwidth borrowing and time slice reallocation.

The invention relates to the technical field of cloud side end computing, and discloses a cloud side end cooperative computing resource dynamic allocation method based on task-aware migration. The method comprises the following steps: acquiring real-time load characteristics and resource demand characteristics of calculation tasks in a cloud side end system, and dividing task priority queues in combination with task type identifiers; extracting historical execution records of tasks at cloud, edges and terminal nodes, constructing a task execution feature library, and generating a resource demand prediction model in combination with real-time load features; analyzing network transmission time delay characteristics of a cloud end and edge nodes, measuring real-time calculation capability fluctuation data of terminal equipment, and establishing an inter-node resource collaboration degree evaluation matrix; generating an initial migration strategy according to the prediction model and the evaluation matrix, monitoring actual resource occupancy deviation of the task, forming a final decision in combination with a node resource state correction strategy, triggering cross-node migration, and synchronously updating the priority queue and the evaluation matrix.

The invention relates to the technical field of data packet transmission, and discloses a data packet transmission control method and device for a low-power-consumption dual-mode Bluetooth chip, and the method comprises the steps: obtaining a signal strength parameter, a power consumption parameter, a transmission rate parameter and an environment parameter of the dual-mode Bluetooth chip, inputting the parameters into a deep time convolution network, and carrying out the time sequence feature extraction, obtaining a transmission mode switching judgment result; calculating transmission state evaluation data; the chip transmitting power is adjusted in a grading mode, standby power consumption is controlled through a nanoamp LDO circuit, and a dynamic power control parameter is obtained; performing compression coding on the data packet to obtain a dual-mode transmission protocol configuration parameter; executing time sequence sampling, and constructing a dual-mode state feature sequence; the data packet delivery success rate, the end-to-end transmission time delay and the total power consumption of the system are calculated, transmission control parameter optimization is carried out through double-layer deep reinforcement learning, target transmission control parameters are obtained, and the optimal balance of the transmission performance and the power consumption of the dual-mode Bluetooth chip is achieved.

The invention provides an intelligent short message link efficient detection method and system. According to the method, unmanned aerial vehicle cluster deployment is used for forming a dynamic communication topology, and the dynamic communication topology is used for monitoring the time delay mutation rate and the packet loss rate of a damaged short message link in real time and generating a state fluctuation sequence. When it is detected that the transmission time delay gradient exceeds an emergency communication threshold value, an abnormal marking mechanism is triggered, and abnormal association clusters and the space-time coupling relation of the abnormal association clusters are recognized by analyzing the data. Then, the information is bound with timestamps, and a block chain state change event is generated by using a multi-node parallel evidence storage technology; and adjusting the distribution density of the unmanned aerial vehicle according to a verification result, and generating a topology reconstruction factor so as to update a short message transmission path and optimize a communication network. According to the technical scheme provided by the invention, the stability and reliability of efficient detection of the short message link can be improved.

The invention discloses a dynamic load adaptive charging pile liquid cooling control method, relates to the technical field of thermal management, and solves the problems of temperature prediction deviation, local hot spot leak detection and protective supercooling caused by a simplified thermal model based on fixed parameters and key temperature points under rapid load fluctuation. Parameterization time-varying heat supply network parallel multi-rate observation is constructed, a heat exchange coefficient and node heat capacity are identified and calibrated through recursion with physical constraints, transmission time delay is merged into an extended state in an explicit mode, short-window high-frequency sampling and local temperature field reconstruction are triggered based on residual errors, and the time-varying heat supply network parallel multi-rate observation is achieved. A control sequence is issued in parallel by adopting hierarchical rolling type control with a second-order moment uncertainty constraint; based on the scheme, the short-term temperature field prediction precision and the local hot spot identification capability are improved, and the cooling resource directional utilization efficiency and the charging system operation continuity are remarkably improved.

The invention relates to the technical field of data center remote operation, and discloses a data center remote operation method and system based on collection gateway analysis, and the method comprises the steps: obtaining gateway resource data and data flow priority attributes; quantifying according to the resource data to obtain a cache length; when the cache length is greater than a length threshold value, processing by adopting a dynamic load balancing algorithm to obtain a migration data stream; analyzing according to the data stream to obtain a timestamp and a serial number; measuring according to the timestamp and the serial number to obtain transmission delay and packet loss rate; performing evaluation according to the transmission time delay and the packet loss rate, and performing link dynamic switching to obtain a backup transmission path when an evaluation result is a main link fault; according to the backup transmission path, adopting a distributed routing protocol to calculate and obtain a data transmission path; monitoring according to the data transmission path to obtain monitoring data; predicting according to the monitoring data to obtain an adjustment result; and performing optimization according to an adjustment result, and dynamically switching the main link and the standby link to perform data transmission. The method can solve the problem of low overall data transmission efficiency.

The invention provides a low-time-delay communication routing method and system based on a power network, and relates to the technical field of communication routing control. Electromagnetic interference levels and electromagnetic compatibility parameters are considered during path selection, electromagnetic field simulation software is utilized to predict the electromagnetic interference levels in different states in real time, and the communication routing efficiency is improved. A second electromagnetic interference distribution diagram is generated, and the accuracy and optimization effect of path selection are improved; besides, by monitoring and analyzing service transmission requirements and electromagnetic interference environment data of the power internet of things in real time, generating a comprehensive evaluation index, and combining the comprehensive evaluation index with a transmission time delay index, dynamically adjusting a comprehensive priority index of an optimal path, and further improving the self-adaptive capability and response speed of the system.

The invention belongs to the technical field of information and communication, and relates to an active user detection and data decoding method of an asynchronous massive machine type communication system. Aiming at the problem that the detection and estimation performance is reduced due to unknown user time delay in asynchronous transmission, the method comprises the following steps: initial estimation and preprocessing: detecting initial active users and transmission time delay thereof through correlation peaks, and whitening received signals; the iterative joint detection and channel estimation module is used for iteratively updating channel information and data symbol information for multiple rounds based on a factor graph and a message passing algorithm; the data decoding module is used for decoding data based on a soft decision device; the detection and decoding performance is improved by transmitting external information among the modules; and the time delay parameter updating adopts a greedy search algorithm to obtain the optimal time delay. According to the method, the active user detection rate, the channel estimation precision and the data decoding accuracy under the condition that the receiving and transmitting ends are completely asynchronous are improved.

The invention relates to the technical field of information transmission, in particular to a wireless data transmission system and method based on 5G communication. The method comprises the following steps: acquiring 5G communication data of an industrial park and carrying out park unit communication demand analysis to obtain industrial park unit communication demand data; performing virtual slice priority redistribution according to the industrial park unit communication demand data to obtain optimized virtual slice priority data; performing dynamic resource sharing strategy analysis according to the optimized virtual slice priority data to obtain an industrial park communication resource dynamic sharing strategy; acquiring real-time industrial park 5G communication data and performing unit communication transmission time delay evaluation so as to obtain unit communication transmission time delay data; and carrying out dynamic sharing time sequence optimization on the dynamic sharing strategy of the industrial park communication resources based on the unit communication transmission time delay data so as to obtain an optimized dynamic sharing strategy of the industrial park communication resources. The bandwidth utilization rate of the network can be improved.

The invention discloses an Internet of Things main service platform data analysis cooperation method, and relates to the technical field of data analysis, and the method comprises the following steps: obtaining a to-be-analyzed terminal uploading data set, and detecting the real-time transmission time delay and data encryption level of each data segment in the terminal uploading data set; based on the historical data analysis collaborative log, extracting a tolerance loss coefficient between the real-time transmission time delay and the analysis fault-tolerant rate, and obtaining an analysis fault-tolerant deviation value caused by transmission time delay change according to the tolerance loss coefficient and the real-time transmission time delay; if the real-time transmission time delay of the current Internet of Things main service platform does not cause interference on the data encryption analysis algorithm, processing the data encryption grade and the analysis calculation power consumption to obtain a calculation loss coefficient, and performing calculation power compensation on the initial analysis calculation power distribution quantity according to the calculation loss coefficient, the data encryption grade and the analysis fault-tolerant deviation value; obtaining a first actual analytical calculation force; the method has the effect of improving the collaboration efficiency and stability of data analysis of the whole platform.

The invention discloses a holder control method and device, a storage medium and electronic equipment. The method comprises the following steps: in response to a cradle head control start instruction, controlling a cradle head to execute a target action corresponding to the cradle head control start instruction, and obtaining a time delay and a frame rate corresponding to the cradle head, the cradle head control start instruction is sent by a target terminal, and the time delay represents a transmission time delay between the target terminal and the cradle head; the frame rate represents the frame rate used by the holder to transmit data; and determining the number of target frames based on the number of frames which are sent to the target terminal by the cradle head and are not determined to be received by the target terminal, the time delay and the frame rate, clearing non-key frame data corresponding to the number of the target frames in the first cache data, and controlling the cradle head to stop executing a target action in response to a cradle head control ending instruction. The technical problems that a holder and a video picture are not synchronous enough and the video picture is delayed in the prior art are solved.

A semiconductor device and a method for preparing the semiconductor device, the semiconductor device comprises a first semiconductor structure, a second semiconductor structure, a third semiconductor structure, a first bit line connection line and a second bit line connection line, the first semiconductor structure comprises a sensing amplifier circuit, the second semiconductor structure is connected to the first semiconductor structure by bonding and comprises a first storage unit, the third semiconductor structure is connected to the second semiconductor structure by bonding and comprises a second storage unit, the first bit line connection line is associated with the first storage unit, the second bit line connection line is associated with the second storage unit, the first bit line connection line and the second bit line connection line are comparatively coupled to each other by the sensing amplifier circuit, and the length difference between the first bit line connection line and the second bit line connection line is less than or equal to 2 microns. The coupling capacitance of adjacent bit lines can be reduced, the anti-crosstalk capability can be improved, and the difference in signal transmission time delay can be reduced, thereby improving the stability and reliability of the device.

A parameter determination method, communication device and system, the method being executed by a transmission device connected with a first client device of a first data center, the method comprising: determining a transmission delay and / or a transmission distance of a transmission pipeline between the first data center and a second data center; time delay indication information is sent to the first client side equipment, the time delay indication information indicates transmission time delay and / or a transmission distance, and the transmission time delay and / or the transmission distance are / is used for determining at least one of the following items: the number of sending queues, the depth and the block size of a message block of the service data; wherein the service data is from the first client side equipment and needs to be transmitted through the transmission pipeline, and the sending queue is a queue of the first client side equipment when the service data is sent through the transmission pipeline. The technical scheme can be applied to the technical field of communication, and when data long-distance transmission is carried out based on the RDMA, the throughput during data transmission is improved, so that the efficiency of data long-distance transmission is improved.

The invention provides an information transmission and acquisition method and device, and communication equipment, and the method is executed by a first network function, and comprises the steps: sending a service quality configuration file and / or a service quality rule to access network equipment; and / or sending the service quality rule to a second network function, wherein the second network function is used for realizing user plane management; wherein the first network function is used for realizing session management. According to the scheme, the first network function for realizing session management is adopted to directly send the service quality configuration file and / or the service quality rule, so that the service quality configuration file and / or the service quality rule can be directly transmitted to the access network equipment and the second network function without forwarding through the network function for mobile access management; signaling transmission can be reduced, and transmission time delay is reduced.

The invention provides a video monitoring transmission time delay detection method based on image recognition and electronic equipment, and the method comprises the steps: enabling a marker to move, obtaining the moving time of the marker, collecting a video image of the marker, and obtaining the moving time delay of the marker based on the video image of a standard object; based on the moving time of the marker and the moving time delay of the marker, obtaining a single transmission time delay; and repeating the above process, and obtaining the transmission time delay of the test based on the single transmission time delay and the preset number of test times. According to the video monitoring transmission time delay detection method based on image recognition provided by the invention, the video monitoring transmission time delay is acquired by using the moving time of the marker and the moving time delay of the marker acquired from the video image, so that the accuracy of acquiring the video monitoring transmission time delay can be improved.

The invention relates to a communication method, device and system. The third core network element determines a first computing power resource according to a time delay threshold value of the first computing task and the first time delay, the first computing power resource is a computing power resource required by the computing node for processing the first computing task, and the time delay threshold value is related to an end-to-end time delay requirement of the first computing task; the first time delay is a transmission time delay for transmitting the message corresponding to the first calculation task between the terminal equipment and the network element of the access network. And the third core network element sends a first request for triggering the first computing node to process the first computing task by using the first computing power resource. According to the embodiment of the invention, the sum of the processing time delay of the first computing node and the transmission time delay of the message (namely, the actual end-to-end time delay) can meet the end-to-end time delay requirement of the first computing task as much as possible, so that the access efficiency of the first computing task is improved, and the user experience is also improved.

The application discloses a wireless signal transmission method, comprising the following steps: transmitting an incident signal within a set resource time length; a first transmission time delay exists in the process of the incident signal reaching a receiving end; a reverse signal is a scattered signal in response to the incident signal, and a second transmission time delay exists in the process of the reverse signal reaching a target end; the time length of the incident signal and / or the reverse signal is set so that the reverse signal reaching the target end is within the set resource time length. The application also comprises a device applying the method. The application solves the timing problem of a reverse scattering communication device transmitting a signal in a mobile communication network, so as to meet the index requirements of the system in terms of inter-code interference and inter-channel interference, and is especially suitable for a system of reverse scattering communication.

The invention discloses a near-earth satellite communication task unloading method based on ground cooperative computing and a program product, a satellite communication task unloading model is established, and the satellite communication task unloading model aims at the minimum task unloading total time delay. A task unloading rate strategy of a satellite, an unloading path strategy of a task on the satellite and an unloading path strategy of the task on a ground station are used as variables to be solved; the task unloading total time delay is specifically the sum of the calculation time delay of the task on the satellite, the transmission time delay of the task unloading from the satellite to the ground station, the transmission time delay of the task between the ground stations and the calculation time delay of the task on the ground station, and then solving the satellite communication task unloading model to obtain a task unloading strategy. According to the method, the unloading strategy is relatively small in time delay and high in robustness, the defect that the LEO calculation capability is limited is effectively overcome, the upper limit of the task quantity accepted by a single LEO is greatly increased, and meanwhile, the problem of non-uniform task processing distribution of a ground station is solved.

The invention provides an automatic driving-oriented time-sensitive network time delay control method and system, and relates to the technical field of network communication, and the method comprises the steps: obtaining data packet transmission time delay information and network topology information, and generating a candidate transmission path set based on node connectivity layering and state space search; historical time delay data are collected, and prediction calculation and weight distribution are carried out; and iteratively updating the time delay weight based on the hierarchical time scale, and selecting a path with the highest comprehensive score to forward the data packet. According to the invention, the network transmission time delay of the automatic driving system can be effectively reduced, and the stability and reliability of data transmission are improved.

The invention belongs to the field of communication, and provides a dynamic clock synchronization method based on bidirectional time delay calibration, which is used for solving the problem of insufficient clock synchronization precision between base stations caused by environment change and signal transmission time delay fluctuation in the prior art. In the invention, a master base station sends a local synchronization signal to a slave base station, the slave base station performs synchronization state detection after receiving the synchronization signal, enters an asynchronous state after detection failure, and returns an asynchronous signal to the master base station; the master base station measures the transmission delay between the master base station and the slave base station after receiving the asynchronous signal; meanwhile, environment parameters of the master and slave base stations are monitored in real time through an environment sensor, and the master base station calculates an environment compensation correction value according to the environment parameters of the master and slave base stations; the main base station adjusts a local clock in real time on the basis of the transmission time delay and the environment compensation correction value, and dynamic clock synchronization is achieved; in conclusion, through bidirectional time delay calibration and real-time environment compensation, the clock synchronization precision between the base stations is remarkably improved.

The embodiment of the invention provides a control method and device for data transmission equipment, target equipment and reference equipment are set to allow data transmission when a jump edge of a clock signal arrives, and the method comprises the following steps: detecting current transmission delay information of an initial data transmission system, the transmission time delay information is used for indicating a time delay condition during data transmission between the target equipment and the reference equipment; positioning a system adjustment position on the initial data transmission system according to the transmission delay information and detecting a system adjustment parameter to be adjusted on the system adjustment position, the system adjustment parameter being used for reducing the degree of influence of the transmission delay information on data transmission between the target device and the reference device on the system adjustment position; and adjusting the initial data transmission system at the system adjustment position according to the system adjustment parameters. According to the data transmission method and device, the problem that the data transmission efficiency between the devices is low is solved, and the effect of improving the data transmission efficiency between the devices is achieved.

The invention discloses an ASM signal time delay measuring and calculating system based on a software radio peripheral. The system comprises a transmitting end and a receiving end, the transmitting end comprises a signal generator, a first time-frequency synchronization device and a VHF transmitting antenna; the first time-frequency synchronization equipment externally triggers the signal generator to send a pre-generated ASM signal through the VHF transmitting antenna; the receiving end comprises software radio equipment, second time-frequency synchronization equipment, a computing host and a VHF receiving antenna; and the second time-frequency synchronization equipment externally triggers the software radio equipment to receive ASM signals through the VHF receiving antenna, the software radio equipment sends a processed receiving signal sequence to the computing host, and accurate time delay is obtained through a sliding correlation algorithm. According to the invention, the ASM signal is received based on the USRP, and the signal time delay is calculated by using the good autocorrelation of the ASM signal, so that the signal transmission time delay measurement precision is improved, and the ship navigation safety is ensured.

The invention provides a manipulator AWC calibration method and system based on delay compensation, and belongs to the technical field of semiconductor manufacturing equipment automation. The method comprises the steps that when the operation speed of a manipulator is low, the position of a sensor in a robot basic coordinate system is calculated; when the operation speed of the manipulator is full speed, inversely solving the radius of the wafer according to the position of the sensor in the robot basic coordinate system and the position of the manipulator when the sensor is triggered; in the process of inversely solving the radius of the wafer, constructing a delay compensation model; and delay verification is conducted on the constructed delay compensation model, when the verification result is that calibration succeeds, the high-speed control mechanical arm stretches out of the station, and the delay compensation model is adopted for deviation correction. The problem that AWC calibration precision is reduced due to signal transmission delay under the high-speed working condition is solved, and laser sensor base coordinate calibration and wafer circle center positioning errors under high-speed movement are reduced.

The invention discloses an NTN data transmission method and device, equipment, a storage medium and a program product. The method comprises the following steps: repeatedly transmitting downlink data in continuous M time slots under the condition that a downlink transmission error rate exceeds a first threshold value and a transmission delay exceeds a second threshold value, and / or, under the condition that the downlink transmission error rate does not exceed a first threshold value or the downlink transmission time delay does not exceed a second threshold value, according to the downlink transmission error rate and the transmission time delay, determining the HARQ process number NDL for starting the HARQ feedback, and starting the HARQ feedback for the NDL HARQ processes; and / or, under the condition that the uplink transmission error rate does not exceed a third threshold value or the transmission time delay does not exceed a fourth threshold value, according to the uplink transmission error rate and the transmission time delay, determining the number NUL of HARQ processes using the first mode, using the first mode for the NUL HARQ processes, and using the second mode for the remaining HARQ processes, the second mode indicates that one uplink HARQ process is allowed to be scheduled again after a first duration. The embodiment of the invention can improve the data transmission efficiency.

The application discloses a time slot scheduling method of an underwater dynamic multi-hop distribution network based on a time division multiple access protocol, relates to the field of underwater acoustic communication, and is aimed at the underwater multi-hop distribution network, improves the traditional static time slot allocation based on the TDMA protocol, designs a data packet frame structure, comprehensively considers transmission time delays among underwater nodes, dynamically adjusts time slots allocated to the underwater nodes based on the maximum transmission time delay, considers a dynamic node random access condition, and realizes the design of the time slot scheduling method of the underwater dynamic multi-hop distribution network.Compared with the traditional static time slot allocation method, the method can effectively improve the overall throughput of the network and optimize the network operation efficiency.

The present invention discloses a multi-agent collaborative perception method under complex noise based on lidar, which includes the following steps: Step S1, perform coordinate transformation and preprocessing on the lidar point cloud of the collaborative agents; Step S2, use the method of deep learning to extract the feature maps of the lidar point clouds of all collaborative agents, and then compress the feature maps of the lidar point clouds of the collaborative agents and transmit them to the central vehicle; Step S3, the central vehicle decompresses the received feature maps of the lidar point clouds of the collaborative agents, and at the same time uses the feature maps of the lidar point clouds of a small number of previously received collaborative agents to perform corresponding deep learning processing on the transmission time delay and relative pose error; Step S4, the central vehicle uses the attention mechanism to fuse the feature maps of the lidar point clouds of the collaborative agents into the feature map of the central vehicle to obtain the final feature map; Step S5, send the final feature map into the detection head to obtain the detection result; solves the problem of the performance degradation of the multi-agent perception system under the transmission time delay and relative pose error.

The invention discloses a vehicle-mounted multi-radar system interference suppression method, system and platform based on frequency hopping frequency modulation continuous waves, and the method comprises the steps: arranging at least one front radar and four corner radars on a vehicle, and enabling the field angles of the radars to have an overlapping region; wherein the waveform transmitted by each radar consists of N linear frequency modulation continuous waves, and the duration of each chirp is T microseconds; the chirp starting frequency of each radar changes along with time, so that N1 chirp is greater than or equal to 1 and less than or equal to N when each radar passes through N1 chirp; the initial frequency is increased or decreased by a fixed step delta F, and the average frequency hopping step is delta F / N1; according to the system and the platform corresponding to the method, the chirp initial frequency is dynamically adjusted and the time delay is accurately controlled, so that the interference-free cooperative work among the multiple radars is realized, the distance resolution, the speed resolution and the signal-to-noise ratio are remarkably improved, and the system and the platform have the advantages that the interference-free cooperative work among the multiple radars is realized. And meanwhile, hardware design is simplified.

The invention relates to the field of signal loop control, particularly discloses a medium-voltage switch cabinet intelligent signal loop system and method based on a wireless ad hoc network, and constructs a collaborative diagnosis system composed of intelligent sensing nodes, an edge computing gateway and the wireless ad hoc network. The intelligent sensing node immediately captures and encapsulates state data containing a high-precision local timestamp at the moment that the state of the circuit breaker changes. After the data is transmitted to the edge computing gateway through the wireless ad hoc network in a multi-hop mode, the gateway carries out deep analysis on the received data packet through a special time sequence analysis algorithm, and therefore inherent mechanical operation time delay and variable wireless network transmission time delay can be effectively separated out. Therefore, the technical problem of unreliable diagnosis result caused by confusion of network delay jitter and mechanical delay is solved, and accurate judgment of the equipment state is realized.

The application is suitable for the technical field of internet equipment, and provides an industrial internet equipment intelligent interconnection control method and system based on edge computing, acquires industrial internet equipment control basic information, and establishes an equipment basic information table through the basic information; collects own operation state parameters through the basic information table and sends the operation state parameters to an edge computing node to comprehensively judge the operation state of the internet equipment; if it is judged that the collaborative control requirement is met, the edge computing node selects a collaborative control strategy according to the judgment result, compares the equipment load with a load threshold value; when an equipment exception is detected, the control state and execution result during the exception period are synchronized to a cloud end management node, the control instruction transmission time delay and the occurrence probability of multi-equipment collaborative control conflict are effectively reduced, and the control real-time performance, stability and reliability of the industrial internet equipment in a complex operation environment are improved.

The invention relates to the technical field of data encryption, in particular to a transmission encryption method based on a Beidou communication data architecture, which comprises the following steps of: S1) adjusting related communication data and calibrating the related communication data as a data item to be filled or a data item to be missing based on the related communication data needing to be transmitted in the stage and an adaptive data transmission channel in the related data architecture; s2) performing priority processing on the to-be-missing data items, selecting part of data from the corresponding to-be-missing data items based on changed capacity data of the to-be-missing data items, calibrating the part of data as to-be-filled data, then determining to-be-transmitted missing items, performing related filling on the to-be-filled data items, and preferentially confirming filling capacity data corresponding to the to-be-filled data items; relevant data are selected from the to-be-filled data, and then to-be-transmitted filling items are determined; and S3) performing data transmission based on the determined data transmission channel of the corresponding data item, and determining an encryption key of the corresponding data item based on the transmission delay of each group of different data items in the transmission process.