1306 results about "Transmission time" patented technology

A low-delay multi-protocol intelligent lighting synchronization system based on a unified abstraction layer comprises the steps that an instruction from a multi-protocol bridging module is received, and network round-trip time data of terminal equipment is acquired through an active detection mechanism; based on the network round-trip time data, adopting a Kalman filtering algorithm to construct a delay prediction model so as to predict the future network delay of the terminal equipment; inputting the instruction into a third-stage buffer area for processing, and dynamically adjusting the trigger frequency of the active detection mechanism according to the load state of the third-stage annular buffer area; calculating queue delay of the buffer area according to the received load state of the buffer area, and obtaining final sending time of the instruction in combination with future network delay of the terminal equipment; and at the final sending time, sending the instruction from the sending buffer area to the corresponding terminal equipment. According to the system, low-delay and high-stability synchronization of cross-protocol equipment in the field of intelligent illumination is realized.

The invention discloses a method for estimating the safety communication rate of a near-earth satellite by using an SDFS cooperating with a GLRT. The method comprises the following steps: constructing a communication system model between the near-earth satellite and a ground terminal; analyzing the signal and channel characteristics, and obtaining the distance between the nodes, the channel gain and the received signal distribution; under the condition that the transmitting power of each monitoring party is unknown, estimating the transmitting power by adopting generalized likelihood ratio test, and independently executing the generalized likelihood ratio test based on the observation data of each monitoring party; the superior manager performs joint judgment based on a soft decision fusion scheme in combination with the generalized likelihood ratio test result of each monitoring party and a joint threshold so as to estimate the detection error probability of the monitoring party; a joint optimization strategy of the transmitting power and the number of continuous transmission time slots is constructed, and the total throughput of the system is maximized under the condition that the cooperative concealment constraint is met; according to the invention, an innovative solution is provided for reliable communication of the near-earth satellite in a complex monitoring environment.

The invention relates to the technical field of Internet of Things electric power communication, and discloses a remote software upgrading method and system based on an HPLC high-speed power line carrier network. The remote software upgrading method is applied to software upgrading equipment, and specifically comprises the following steps that S101, a master control node of software to be upgraded is obtained, the master control node completes encryption of an upgrading instruction packet through HPLC network broadcasting, if the master control node is in an offline state, a response is triggered through a wake-up pulse signal synchronized with a power line power frequency period, and if the master control node is not in the offline state, the software to be upgraded is upgraded; and it is ensured that the whole network nodes complete instruction synchronization within the preset time. Omnibearing upgrading and optimization are achieved through three core technologies of dynamic fragmentation transmission, millisecond-level service continuity guarantee and resource limit adaptation, the packet loss rate of a high-noise environment is compressed to 0.1% based on a signal-to-noise ratio self-adaptive fragmentation strategy (128KB-512KB), the average transmission time is reduced to 17.4 minutes from 30 minutes in combination with a multi-path concurrent transmission and breakpoint resume protocol, and the transmission efficiency is improved. And 300ms whole-network instruction synchronization is realized with the assistance of a power frequency synchronization wake-up mechanism.

The invention discloses a method for aggregating ocean buoy data, which comprises the following steps of: establishing a space-time correlation model according to the spatial distribution density of buoy clusters and the dynamic characteristics of an ocean environment, and adaptively dividing buoy groups with a data compression cooperative relationship; performing a data-related compression operation within the buoy group; constructing a transmission priority dynamic sorting engine, and calculating a dynamic weight coefficient; performing hierarchical packaging processing on the differential coding data, distributing enhanced forward error correction coding resources for high-priority data, and reserving redundant transmission time slots; the method comprises the following steps: receiving a hierarchical data packet through a low-orbit satellite and executing on-satellite preprocessing, reconstructing an original data stream by using a distributed decoder, and meanwhile, fusing multi-dimensional space-time related data to generate an aggregated data product; and finally, the aggregated data product is transmitted to a ground data center through a satellite downlink. According to the invention, uplink data volume is reduced, disaster monitoring timeliness is improved, ground station processing load is reduced, and system environment adaptability is enhanced.

A method of scheduling a UWB (Ultra-Wideband) ranging session includes: obtaining a first signal transmission schedule of first available signal transmission times of first wireless signals; and transmitting, from a first UWB device to a second UWB device, a ranging control message indicating a second signal transmission schedule including second available signal transmission times for second wireless signals that comprise UWB signals, wherein the second available signal transmission times are based on the first available signal transmission times.

The invention relates to a method for performing a link adaptation in an uplink transmission between a user equipment, UE, and a network node in a telecommunication network, the method comprising:obtaining a first value of a Modulation and Coding Scheme, MCS, for a future transmission at transmission time interval k in the uplink transmission, the first value of MCS being determined on the basis of a Signal to Interference and Noise Ratio, SINR, estimated by the network node for the future transmission at transmission time interval k; andpredicting a second value of the MCS for the future transmission at transmission time k by using a Q-learning process having as input the first value of MCS, first data indicating whether the future transmission at transmission time k is a first transmission or a retransmission, and second data indicating whether a feedback acknowledgement, ACK / NACK, of a transmission that took place at transmission time interval k−1 is equal to ACK or NACK.

The invention discloses an audio and video data transmission anti-interference method and system based on coding error correction, relates to the technical field of audio and video data transmission, and is used for solving the problem that centralized error burst occurs in audio and video data transmission due to periodic strong electromagnetic interference generated by high-power inductive load equipment in an industrial production environment. The method comprises the following steps: acquiring predicted interference occurrence time, duration and reference intensity range of high-power inductive load equipment in an industrial production environment; detecting the channel quality of a transmission link to obtain the actual starting time and ending time of interference, the influence on a specific frequency range and the specific mode and length of error burst; predicting interference occurrence time according to an interference rule; generating a transmission strategy adjustment instruction according to the priorities of the multiple paths of audio and video streams; and according to the transmission strategy adjustment instruction, carrying out coding error correction or transmission time sequence adjustment on the multiple paths of audio and video streams before the interference occurrence time.

The invention provides a satellite signal transmitting method, device and equipment and a computer storage medium, and the method comprises the steps: determining a target first signal and a target satellite through signal quality evaluation parameters of a plurality of first signals received by first ground equipment, and then carrying out the transmission of a satellite signal based on a pseudo-range of the target first signal and an error correction parameter of the target satellite, calculating the downlink transmission time of the second signal, then obtaining the receiving moment when the first ground equipment receives the target first signal, calculating the theoretical emission moment of the second signal based on the receiving moment and the downlink transmission time of the second signal, and obtaining the superframe duration and the theoretical emission moment of the second signal; and calculating the first uplink transmission time delay when the second ground equipment transmits the third signal to the target satellite, and finally adjusting the actual transmission time of the third signal of the second ground equipment according to the first uplink transmission time delay, so that the actual transmission time of the third signal is aligned with the theoretical transmission time of the second signal, thereby improving the transmission success rate of the satellite signal.

The invention relates to the technical field of artificial intelligence and audio processing, can be applied to the field of intelligent medical treatment and financial science and technology, and discloses an audio watermark processing method and device, equipment and a medium, and the method comprises the steps: carrying out the coding of continuously inputted audio blocks, and obtaining an audio feature vector; acquiring a digital watermark, and performing time modulation on the digital watermark according to the audio lengths of the blocks by using a multi-layer perceptron to obtain a watermark implicit vector; embedding the watermark implicit vector into the audio feature vector to obtain a target audio vector; performing quantization processing on the target audio vector to generate a target audio spectrum embedded with a digital watermark; and decoding the target audio frequency spectrum to obtain a target audio. According to the method, the continuously input audio blocks are coded, the method can adapt to a streaming scene, the audio data are processed segment by segment, the watermark embedding requirement of the continuous audio stream is met, the audio can be compressed, the data volume is effectively reduced, the transmission time consumption is reduced, and the low-delay communication requirement is met.

The invention provides a VR game data synchronous transmission method based on a 5G network, and the method comprises the steps: obtaining a multi-type data stream generated during the operation of a VR game, extracting scene rendering data and player interaction data from the multi-type data stream, separating a feature value of each data type, and obtaining a data priority sequence; analyzing the real-time requirements of the scene rendering data and the interaction data according to the data priority sequence, and judging a key data packet which needs to be transmitted immediately; the method comprises the following steps: monitoring a current bandwidth fluctuation condition through a network transmission layer, calculating available bandwidth and delay parameters from network state data acquired in real time, and obtaining a resource allocation reference value in a dynamic scene; and for high-priority data packets, a dynamic resource allocation algorithm is adopted to adjust a transmission queue sequence, a resource allocation reference value is corrected through a bandwidth fluctuation parameter, and a transmission time slot allocation scheme of the key data packets is determined.

The invention relates to the technical field of low-power-consumption data acquisition and transmission, in particular to an NB-IoT network-oriented low-power-consumption data acquisition and transmission system and a medium, and the system comprises a network initialization unit which is used for deploying a data acquisition terminal in a signal attenuation area and defaulting the data acquisition terminal as a working node after power-on; the ferry node election unit is used for acquiring the signal quality score and the residual energy score of the current battery, and calculating a comprehensive score by combining the energy consumption attenuation value; switching the terminal with the highest comprehensive score to a ferry node; the hierarchical data acquisition unit is used for awakening the working node based on a preset awakening strategy, acquiring equipment reading data, sending the equipment reading data to the ferry node, entering a transient monitoring state, and entering a deep dormant state after receiving a receiving confirmation signal of the ferry node; the network interruption data temporary storage and reissuing unit is used for compressing and storing the to-be-transmitted data when the ferry node fails in network connection in the optimal transmission time window; once the network is recovered to be available, resending transmission is performed.

The invention discloses a log processing method and device, a medium and a product, relates to the technical field of distributed system log management, and can be applied to the field of financial science and technology. The method comprises the following steps: sending a receiving node query request to a policy service, so that the policy service determines a target receiving node according to the receiving node query request; obtaining a target receiving node fed back by the policy service; based on the local system portrait model, processing the current system index data to obtain a business trough period window; determining an estimated transmission time length and a recommended transmission time period according to the data volume and the current available bandwidth of the to-be-transmitted log file and the service trough period window; sending a transmission decision request to a policy service; obtaining a target transmission time period and a fragment sequence fed back by the policy service; and transmitting a fragment sequence to the server through the target receiving node based on the target transmission time period, the fragment sequence comprising at least one log fragment. Through the technical scheme, the log processing efficiency can be improved.

The invention discloses an SSD multi-layer pre-reading method and device, computer equipment and a storage medium, and relates to the technical field of SSD pre-reading. The method comprises the steps that whether a preset pre-reading condition is triggered or not is judged; if the preset pre-reading condition is triggered, loading the data into a multi-layer pre-reading buffer area of the solid state disk; if a read command is received, judging whether the read command hits the multi-layer pre-read buffer area or not; and if the read command hits the multi-layer pre-read buffer area, reading target data corresponding to the read command from the multi-layer pre-read buffer area. According to the method, the NAND inherent cache resources are reused, so that the pre-read data capacity is expanded by multiple times, and hardware cost does not need to be newly increased; when the hit occurs, the physical reading delay of the NAND array is thoroughly avoided, and the traditional serial operation is converted into buffer area direct reading. For a sequential read scene, most read commands skip an NAND access link through multi-stage buffering, and the average delay is compressed from a hundred microsecond level to a microsecond level transmission time, so that the performance step-type improvement is realized.

The invention relates to the technical field of clock synchronization, in particular to a high-precision clock synchronization method and system based on Beidou satellite navigation, and the method comprises the steps: a pseudo satellite master station receives a Beidou signal, carries out the processing of capturing, tracking and the like, solves the transmission time and transmission delay, and adjusts a local clock to obtain the local receiving time; the 1PPS pulse is corrected, so that the rising edge of the 1PPS pulse is aligned with the whole second time of the local receiving time; and the master station completes time service by taking the 1PPS as an anchor point, adjusts the telegraph text transmission time delay, and broadcasts time service information to the slave station. And the slave station receives the telegraph text resolving time, calculates the transmitting time and synchronously transmits the telegraph text with the master station, so that the time synchronization of the ground-based pseudo satellite system and the Beidou is realized. According to the method provided by the embodiment of the invention, the unification of the ground-based pseudo satellite system and the Beidou time reference is realized, the problem that the existing system cannot unify the time reference with the Beidou is solved, high-precision time synchronization is ensured, and indoor and outdoor seamless positioning is supported.

The invention discloses a multi-beam spatial frequency conflict resolution method which is suitable for a large-scale low-orbit satellite constellation system. According to the method, high-orbit satellites are used as centralized control nodes, orbit states and service requirements of low-orbit satellites in a system are received, and allowable transmission practice windows and required continuous transmission time slot numbers of the low-orbit satellites are analyzed; on the basis, calculating a space intersection area and a potential interference time period between the low-orbit tracks; and aiming at the differentiated transmission requirements, according to a preset orbit priority sequence, sequentially allocating transmission time slot resources to each low-orbit satellite transmission service. According to the invention, the overall perception of a high-orbit satellite on the orbit state and service requirements of a low-orbit satellite, the search and judgment of orbit cross interference beams and time periods, and the comprehensive decision of service transmission time sequence optimization distribution are carried out; the method achieves the effective avoidance of potential same-frequency interference of transmission services of satellites with different orbits in an intersection region in a complex space-time dynamic environment, and remarkably improves the transmission success rate and the overall resource utilization rate of a large-scale low-orbit constellation system.

The invention provides a real-time accurate measurement method and system for the diameter at breast height of a forest based on a low-power-consumption wireless network, and relates to the technical field of forestry monitoring, and the method comprises the steps: deploying wireless measurement nodes in a forest region, constructing a network topology structure based on a signal intensity value, calculating a data transmission path, distributing a transmission time slot, and collecting the data of the diameter at breast height in real time; optimizing a transmission path according to the transmission delay and the congestion degree, monitoring the node electric quantity and dynamically adjusting the network; and finally, the data is transmitted to a gateway and a report is generated and uploaded to the cloud. According to the invention, real-time and accurate acquisition and reliable transmission of forest tree diameter at breast height data under the condition of low power consumption can be realized, and the efficiency and accuracy of forestry monitoring are improved.

The invention discloses a low-delay and high-reliability wireless communication method and system, a medium and a product, and relates to the field of industrial information and data processing.The method comprises the steps that when an industrial control data packet with a priority processing identifier is received, MAC address table look-up operation is executed on the industrial control data packet, and a priority data packet containing a target address identifier is generated; constructing a data transmission path forwarding by bypassing the network bridge according to the target address identifier of the priority data packet; transmitting the priority data packet to a Wi-Fi driving layer through the data transmission path, so as to write the priority data packet to a hardware sending queue, and generating a sending data packet containing a time sequence identifier; determining a periodic transmission time window synchronized with the industrial control period according to the time sequence identifier of the sent data packet; and detecting a channel state index in the transmission time window, generating a retransmission control parameter according to the channel state index, and executing a data packet transmission operation according to the retransmission control parameter. According to the invention, the processing time delay of wireless communication can be reduced.

The invention provides a method and a device used in a node for wireless communication. The method comprises the following steps: a first node determines propagation time delay according to a first parameter; and compensating the sending time of the first data in advance according to the propagation time delay. Wherein the first parameter comprises at least one of the following information: position information of the first node, ephemeris information of a service satellite, public timing advance, parameter effective time, reference signal sending time or an identifier of a track section where the satellite is located.

A UE determines a reference UL transmission from among a plurality of UL transmissions on the basis of i) power headroom reporting being triggered and ii) the plurality of UL transmissions overlapping in time on a serving cell of the UE with respect to UL transmission time, calculates a PH value for the serving cell on the basis of the reference UL transmission, and transmits the PHR including the PH value. The determining of the reference UL transmission from among the plurality of UL transmissions may include determining a UL transmission having a predetermined priority among the plurality of UL transmissions as the reference UL transmission.

The invention discloses a multi-node sensor communication link cooperative scheduling method and system based on star flash, and relates to the technical field of new-generation wireless communication and sensors. The method comprises the following steps: constructing a star flash sensor data reporting system; calculating a node valid data volume based on parameters such as sensor types and channel numbers; estimating transmission time and distributing time slots in combination with a star flash frame structure; transmission parameters are dynamically adjusted through a real-time link quality perception and prediction model, and a data priority and preemption mechanism is supported; issuing a scheduling strategy by using the JSON configuration file; and the nodes communicate according to configuration and realize fault self-diagnosis and self-healing. The system comprises a star flash management node, a sensor node and an embedded cooperative scheduling engine. According to the method, multi-node cooperative scheduling, link adaptive optimization and system autonomous recovery are realized, and the communication reliability, the channel utilization rate and the system robustness are remarkably improved.

A method of initiating a UWB (Ultra-Wideband) ranging session includes: obtaining, at a first UWB device, first wireless signal transmission information indicating at least one time gap between first wireless signal transmissions; and transmitting, from the first UWB device to a second UWB device, a UWB ranging session initiation message indicating at least one available time for at least one future UWB signal transmission, corresponding to at least one future time gap, the at least one available time being based on the first wireless signal transmission information.

The invention relates to the technical field of Internet of Things communication, and particularly discloses an Internet of Things communication equipment data transmission packet loss compensation optimization method and system, and the method comprises the steps: obtaining a data packet transmission sequence, and obtaining the receiving state identifiers and transmission timestamps of a plurality of data packets according to the data packet transmission sequence; and acquiring network transmission quality parameters, and acquiring a received signal strength value sequence, a network jitter value sequence and a data packet delay fluctuation value sequence in a continuous time window according to the network transmission quality parameters. According to the method, by dynamically obtaining the multi-dimensional network transmission quality parameters in the continuous time window and calculating the actual loss probability value, misjudgment caused by a fixed threshold value is avoided, reliable recovery of the data flow is achieved in combination with a prediction compensation mechanism and consistency verification, and the problem of packet loss caused by network fluctuation in the environment of the Internet of Things is effectively solved.

The present application relates to the technical field of power communication of Internet of Things, and discloses a remote software upgrading method and system based on HPLC high-speed power line carrier network; the remote software upgrading method is applied to a software upgrading device and specifically comprises the following steps: S101: obtaining a master node of software to be upgraded; the master node completes an encrypted upgrading instruction package through HPLC network broadcasting; if the master node is in an offline state, a response is triggered through a power line power frequency cycle synchronization wake-up pulse signal to ensure that all network nodes complete instruction synchronization within a preset time. The present application realizes all-around upgrading optimization through three core technologies of dynamic fragmentation transmission, millisecond-level service continuity guarantee and resource limit adaptation; an adaptive fragmentation strategy (128KB-512KB) based on a signal-to-noise ratio compresses a packet loss rate in a high-noise environment to 0.1%; combined with multi-path concurrent transmission and a breakpoint resume protocol, average transmission time is reduced from 30 minutes to 17.4 minutes; and a power frequency synchronization wake-up mechanism is used to realize 300ms network-wide instruction synchronization.

This communication apparatus comprises: a control unit that determines, on the basis of a first transmission time for performing a plurality of signal transmissions in a device, a second transmission time for radio waves to be used for the plurality of transmissions; and a communication unit that transmits the radio waves to the device in the second transmission time.

The invention relates to the technical field of photoetching machine data transmission, and discloses an ultra-high-speed distributed data transmission synchronization system of a direct-writing photoetching machine. The system comprises a dynamic exposure pulse analysis module which constructs a distributed transmission delay calculation model based on historical operation data, collects data such as a laser trigger pulse sequence in real time and outputs a theoretical transmission synchronization value; the multi-channel time sequence offset detection module generates a node-level multi-channel time sequence offset matrix through multi-dimensional comparison of the theoretical value and the actual transmission time sequence; the spatial topology mapping module is combined with the physical position and the link impedance parameter to generate a time sequence abnormal propagation path probability distribution cloud picture so as to locate a high-delay area; and the dynamic bandwidth allocation module configures a transmission strategy according to the data, starts redundant channel parallel transmission for a high-delay area, and implements dynamic clock offset compensation for adjacent nodes, so that the synchronization stability and transmission efficiency of data transmission are effectively improved.

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 relates to the technical field of network resource dynamic allocation, and discloses a network resource dynamic allocation method based on network slices, which comprises the following steps of: determining the size and remaining time of a data packet to be sent, constructing an autoregression model by utilizing a flow autocorrelation coefficient, and predicting each slice stream in a prediction window length in combination with Kalman filtering, obtaining a mean value and a variance of each slice stream; establishing opportunity constraints and a target function based on the mean value and the variance of each slice stream in combination with the failure probability upper limit; on the basis of the opportunity constraint and the objective function, calculating a resource allocation proportion of each slice stream in combination with the minimum resource reservation proportion; and based on the resource allocation proportion of each slice stream, in combination with the initial contention window value, the transmission time upper limit, the number of resource units and the number of prior antennas, respectively mapping the resource allocation proportion of each slice stream into contention window value transmission time and resource units of each slice stream.

The invention provides a communication method and a communication device, which are applied to the technical field of communication. For example, the communication method is adapted to a communication scene in which an LTM mechanism is triggered, and the method comprises the following steps: network equipment uniformly calculates the window length of a time window based on sending time information of reference signals of a plurality of candidate cells; the parameter of the window length of the time window is issued to the UE through the first message, and the measurement starting moment information is issued to the UE through the second message, so that the UE measures a plurality of candidate cells in the first time window (determined based on the parameter of the window length of the time window and the measurement starting moment information), redundant measurement and power consumption of the UE can be remarkably reduced, and the user experience is improved. And the measurement efficiency can be improved. According to the embodiment of the invention, the first message and the second message can be compatible with a signaling structure in the existing 3GPP standard, for example, on the premise of keeping the original LTM signaling architecture unchanged, a measurement time sequence control mechanism of the embodiment of the invention is introduced, so that the first message and the second message are compatible with the existing LTM process.

The invention discloses a wireless ranging method and system based on a programmable logic architecture, and belongs to the technical field of indoor positioning, and the method comprises the following steps: receiving an original data frame of a processing module, adding a synchronization frame header and a synchronization frame tail, then carrying out linear frequency modulation spread spectrum coding to form a ranging request frame, recording the sending time, and sending the ranging request frame to a target receiving end; after a ranging response frame is received, a decoded data frame is generated through decoding processing such as time domain filtering and peak detection, coherent accumulation is carried out by taking a first target code element as a reference, a target array is extracted, interpolation refining is carried out to obtain a fine time component, and the arrival time is obtained through multipath elimination. According to the method, main signal energy is enhanced through coherent accumulation, multi-path interference is suppressed in combination with interpolation refinement and time domain filtering, the time measurement precision is improved, and software and hardware cooperative efficient distance measurement is realized.

An example computer-implemented method of data obfuscation is defined. The computer- implemented method comprises monitoring network traffic from one or more IoT devices in a computing environment; generating an obfuscation schedule based on the monitored network traffic, the obfuscation schedule specifying a transmission time and one or more parameters for each of a plurality of decoy data packets to be transmitted according to the obfuscation schedule transmission times and parameters for a plurality of decoy data packets; and transmitting the decoy data packets according to the obfuscation schedule.