31results about How to "High real-time transmission" patented technology

The invention discloses a wireless multimedia sensor network-oriented multipath and multistage routing method, which represents a technical scheme for multimedia data stream transmission in a wireless multimedia sensor network (WMSN) and is mainly used to solve the real-time transmission problem of multimedia streams and prolong network life as long as possible. The method is characterized in that: multiple paths are built to transmit data from a source node to a target node in the WMSN in parallel; and a hierarchical energy-aware routing protocol is adopted to differentiate the specific characteristics of multimedia flows and provide higher service quality to the multimedia flows.

The invention provides an intelligent helmet binocular display system for electric power inspection and a realization method thereof, which are used for assisting power grid power transformation, power distribution and power transmission inspection. According to the method, a binocular imaging optical subsystem and a sequential logical circuit based on an FPGA (Field Programmable Gate Array) are designed; an invented intelligent helmet binocular enhanced reality display system comprises image acquisition, data conversion, caching, storage, protocol conversion and an interface; intelligent helmet binocular imaging enhanced reality display for the electric power inspection is realized. The intelligent helmet binocular display system is high in hardware integration degree, good in system flexibility, low in power consumption and stable in display stability, and the reliability of the whole system is improved. According to an imaging system provided by the invention, the utilization rate of light source light in an imaging process can reach about one time of that of a single chip type imaging system. An image projected into eyes has more saturated and full colors, and a rainbow picture problem, which disturbs a single chip DLP imaging system, does not occur.

The invention relates to a wireless network multichannel combination communication method. The method includes that S1, networking is performed on concentrators by a master station, and adjacent concentrators use different communication channels; S2, networking is performed on collectors by the concentrators, and adjacent collectors use different communication channels; S3, networking is performed on a terminal device by the collectors, the collectors use basic channels to send networking instructions in a broadcast mode to the terminal device, the terminal device receives the commutation channels of the collectors after networking succeeds, and the collectors and the terminal device are communicated with each other. The wireless network multichannel combination communication method has the advantages that multiple basic channels and wide basic channels are used for spacing, so that same frequency interference is avoided, mistaken awakening to the terminal device is prevented, power consumption of the terminal device is reduced and service life of the terminal device is prolonged; the adjacent collectors use the different communication channels, so that competition on the same channel during automatic data sending of the terminal device is lowered, real-time performance of network transmission is improved, system concurrent processing ability and system throughput are improved.

The invention discloses a large-scale parallel real-time transmission method and system for a Beidou satellite navigation signal. Large-scale parallel signal transmission branches are built; large-scale grouping is carried out on satellite navigation messages in sequence; the grouped satellite navigation messages are sent to the parallel signal transmission branches successively; a complex shifting pseudo-random code generator is used for obtaining special navigation satellite parallel transmission branch sub ranging code; spectrum spreading is carried out on navigation messages of all branches respectively; modulation is carried out by same carrier waves with different frequency shifts; carrier wave modulation navigation signals of all branches are superposed and noises are added to form a composite satellite navigation signal; the composite satellite navigation signal is emitted by a single antenna; a receiving terminal carries out carrier removing, dispreading, and demodulation on the received navigation signal in a single antenna receiving manner according to branches and thus the navigation message are transformed from a parallel mode into a serial mode; and a navigation message is obtained to realize real-time navigation and positioning of a Beidou satellite navigation system. The large-scale parallel real-time transmission method and system can be applied to a satellite navigation system widely as well as various ranging systems, communication systems, radio and television systems and control systems.

A remote real-time tire pressure monitoring system for a vehicle comprises at least one vehicle monitoring equipment for obtaining real-time data of tires, at least one vehicle end processing displaymodule and a cloud monitoring center. The vehicle monitoring equipment comprises at least one tire real-time data collector and a transceiver arranged on each tire of the vehicle, the transceiver corresponds to the vehicle and is used for receiving original data transmitted asynchronously by each tire real-time data collector in the running process of the vehicle through an RF short-distance radiofrequency communication mode; the original data of different tires at the moment are processed into data frames representing the current states of all running tires by taking vehicles as units, and compressed data packets of the data frames are uploaded in a triggering manner by taking minutes or seconds as periods or events; the vehicle end processing display module is used for analyzing the compressed current state information of the tires of the vehicle, displaying the current state information to a driver through a display interface and uploading the compressed data to the cloud monitoring center in real time; and the cloud monitoring center is used for processing and displaying the current running tire data of the vehicle in real time.

The invention discloses a big data packet transmission method and a big data packet transmission device based on a real-time data distribution service. The method comprises the following steps: constructing a small data packet publishing and subscribing library, and initializing the small data packet publishing and subscribing library; the publisher publishes a big data packet theme, and the subscriber subscribes the big data packet theme; when the data is sent, dividing the big data packet into a plurality of small data packets, filling related data information into the small data packets, storing the small data packets into a sending queue, and sending the data sub-packets through an asynchronous sending thread; when the subscriber receives the first data sub-packet, creating a cache region corresponding to the size of the big data packet, and copying the received data sub-packet to the corresponding region according to the number; the subscriber verifies the integrity of the data and feeds back the integrity to the publisher when receiving the last data packet; and if the publisher receives the packet loss feedback information, resending the lost data sub-packets until all subscribers receive all the data sub-packets. The invention provides a data sub-package retransmission mechanism with convergence. The occupied system memory is small. The transmission real-time performance is high, and a simple and easy-to-use interface is also exported.

The invention provides a system and a method for real-time transmission of UAV (Unmanned Aerial Vehicle) media data. The system comprises an RTSP (Real Time Streaming Protocol) camera, a proxy server,a client and a cloud server; wherein the proxy server is connected with the cloud server and used for establishing a first communication channel therebetween; the RTSP camera is connected with the proxy server and used for establishing a second communication channel therebetween; and the client is connected with the cloud server and used for establishing a third communication channel therebetween. Through adoption of the system of the invention, a connection can be established to transmit control command data through a TCP (Transmission Control Protocol), and media data can be transmitted through an UDP (User Datagram Protocol), thereby improving real-time performance of media streaming transmission.

The invention relates to an elevator accident site state parameter transmission device. The device is mainly composed of an audio collector (1), a web camera (2), an elevator state collector (3), a video data fusion device (4), a data transmission device (5), a server (6), a mobile terminal (7) and a command platform (8). Elevator accident site state parameters are collected by the audio collector (1), the web camera (2) and the elevator state collector (3), fused in the video data fusion device (4) and transmitted into the server (6) through the data transmission device (5), and the mobile terminal (7) and the command platform (8) can be in audio and video interaction with an accident site through the server (6).

The invention relates to the technical field of optical fiber network communication, and provides a center node device based on a gigabit passive optical network. The device comprises a power module, a center node MAC layer module, a center node high-speed physical layer module and a photoelectric conversion module, wherein the power module is respectively connected with the center node MAC layer module, the center node high-speed physical layer module and the photoelectric conversion module electrically and provides electric energy for the center node MAC layer module, the center node high-speed physical layer module and the photoelectric conversion module, the center node high-speed physical layer module is in communication connection with the center node MAC layer module, and the photoelectric conversion module is in communication connection with the center node high-speed physical layer module and is connected with access nodes through optical fibers. The device has the advantages that a gigabit Ethernet is good in compatibility, optical network bandwidth is large, and outside electromagnetic environment interference is avoided.

The invention discloses a Beidou satellite navigation signal large-scale parallel real-time transmission realization method and system. According to the method and system, large-scale parallel signaltransmission branches are constructed; satellite navigation messages are massively divided into different groups according to structures; the grouped satellite navigation messages are sent to the parallel signal transmission branches successively; a complex shifting pseudo-random code generator is used for obtaining special sub ranging codes for the navigation satellite parallel transmission branches; spectrum spreading is carried out on navigation messages of all the branches respectively; modulation is carried out by same carrier waves with different frequency shifts; the carrier wave modulated navigation signals of all the branches are superposed, and noises are added to the superposed navigation signals, and therefore, composite satellite navigation signals can be formed; the compositesatellite navigation signals are emitted by a single antenna; a receiving terminal carries out carrier removing, dispreading, and demodulation on the received navigation signals in a single antenna receiving manner according to the branches, and thus the navigation messages are transformed from a parallel mode into a serial mode; and the navigation messages are obtained to realize real-time navigation and positioning of a Beidou satellite navigation system. The large-scale parallel real-time transmission method and system can be applied to a satellite navigation system widely as well as various ranging systems, communication systems, radio and television systems and control systems.

The invention discloses a sensor networking method and a sensor network adopting the same. The sensor networking method comprises the following sequence steps of: s1, carrying out device initialization on a base station, and carrying out device initialization on terminals; s2. By the base station, scanning a preset frequency band, and inviting the terminals in the preset frequency band, which work under different frequencies, to access a network; and s3, by the base station, according to a network access sequence of the terminals in the network, allocating working time slots to the terminals which access the network. Therefore, each terminal in the network works under the different frequency and has the independent working time slot; channel stability and anti-interference capacity of wireless communication between the base station and the terminals are ensured; real-time performance of data is improved; the defects of low real-time performance and inconvenience for expansion in an existing sensor network are made up; networking efficiency of sensors is improved; and meanwhile, the sensor network adopting the sensor networking method, which is disclosed by the invention, also has the same advantages.

The invention discloses a UPS remote monitoring system. The UPS remote monitoring system comprises a server arranged in a remote monitoring center and a monitoring device arranged in a to-be-monitored site; the server is in communication with the monitoring device through the Internet. The monitoring device comprises a controller, a UPS power module, a storage device, a temperature detection module for detecting the temperature in the to-be-monitored site, a humidity detection module, a smoke detection module, an electrical parameter comprehensive testing module, a ground resistance testing module for detecting the ground condition of a UPS, a noise testing module for detecting noise in the to-be-monitored site, a voltage withstanding insulation testing module and a second SNMP module, wherein the voltage withstanding insulation testing module and the second SNMP module are each connected with the controller. The UPS remote monitoring system is simple in structure, convenient to install and distribute and low in investment cost; the UPS real-time on-line monitoring system based on the SNMP is designed through the adoption of existing network resources, the system data monitoring is comprehensive, the transmission instantaneity is high, and the problems that a traditional monitoring system is short in monitoring distance and high in investment cost are solved.

The invention relates to a wireless ad hoc network antenna array with an omnidirectional beam mode and a directional self-tracking beam mode. The antenna array is structurally a cylindrical conformalantenna array and comprises a plurality of dual-polarized antenna units and correspondingly arranged mode switching switches. When the antenna array receives signals, the working mode of the antenna array is switched into the omnidirectional beam mode through the mode switching switches, so that the spatial pattern of the antenna array is an omnidirectional beam. When the antenna array transmits signals, the working mode of the antenna array is switched into the directional self-tracking beam mode through the mode switching switches, so that the spatial pattern of the antenna array is consistent with the direction of a received guide signal. The antenna array can meet the requirements of wireless ad hoc network communication on a transmitting and receiving antenna; the signal to noise ratio of signals can be improved when the signals are received; full-airspace beam scanning is not needed when the signals are transmitted; the excitation amplitude and phase of the antenna array do not need to be calculated and adjusted, so that the communication link establishment time can be shortened, and the real-time performance of networking and signal transmission is improved.

The invention relates to a frequency selection method and device based on short wave communication, computer equipment and a storage medium, and the method comprises the steps: determining a communication frequency band corresponding to a communication parameter according to the communication parameter, wherein the communication parameters comprise communication distance parameters and communication time parameters; determining an initial call frequency according to the communication frequency band; enabling a control master station to send an empty data packet to the slave station according to the initial call frequency; and determining the communication frequency between the master station and the slave station according to the response message sent by the slave station. According to the method, the transmission real-time performance of determining the communication frequency is improved, and the efficiency of determining the communication frequency of the master station and the slave station is improved.

An embodiment of the invention discloses a method and a device for quickening an FEC operation based on SIMD technology, and user equipment. When transmission of a data packet is started through a transmitting end, the data packet is extracted firstly, and then whether the data packet supports an NEON engine is determined, if yes, parallel coding is performed on the data packet through the SIMD technology, and FEC packaging is performed for generating an FEC data packet, and then the FEC data packet is transmitted. Through optimizing a common ARM instruction for obtaining an SIMD instruction of the NEON engine for being executed, the NEON engine can automatically optimize partial simple logics in the codes and converts the partial simple logics to parallel operation, and FEC xor packaging or extracting speed is improved, thereby improving transmitting speed and receiving speed of streaming media video data, and improving transmission real-time performance of the streaming media.

The invention discloses a high-voltage pulse generator and a communication method thereof. The high-voltage pulse generator comprises a main controller and sub-controllers, wherein data transmitted between the main controller and the sub-controllers at least comprise a first type of data and a second type of data; and the second type of data comprises at least two kinds. The communication method comprises the following steps: when the first type data is transmitted at present, transmitting a part of the second type of data; when transmitting the first type of data next time, transmitting the other part of the second type of data; and repeating the previous steps till the transmission of the second type of data is finished. Through adoption of the high-voltage pulse generator, high transmission real-time performance of the first type of data is ensured. Moreover, less controller pin resources are occupied; the cost is relatively low; and the problem of data conflict is solved.

The invention discloses a method for real-time full duplex reliable communication between an MCU and multiple FPGAs by using SPIs, and aims to solve the problems that in the prior art, the characteristics of SPI full duplex and a bus are not fully utilized, uncertain-length data cannot be reliably transmitted in real time, and the communication speed of the MCU and the FPGAs is not effectively increased. According to the invention, the MCU terminal is used as a host to continuously and cyclically send the sub-data to the plurality of FPGA terminals through the SPI, and the plurality of FPGA terminals are used as slaves to continuously and cyclically send the sub-data to the MCU terminal through the SPI after receiving the enable signal of the host. After receiving the sub-data, the two parties judge data properties according to the first byte, directly discard the sub-data if the sub-data are invalid, and resend the sub-data if there is a resending application, it is judged whether thecheck bit is correct or not if the sub-data are valid, resending is applied for if the check bit is incorrect, the frame data length is calculated according to the second to third bytes if the checkbit is correct, and complete frame data is formed.

The invention relates to a networking type data acquisition and analysis system and method, and the system comprises an upper computer and networking type data acquisition equipment, wherein the uppercomputer is connected with the networking type data acquisition equipment through a network cable; upper computer analysis software is arranged in the upper computer; the analysis software is responsible for parameter setting and network adapter setting of the system, using a multithreading technology for data processing, receiving, storing, analyzing and displaying of a large amount of data, andconducting on-line and off-line analysis on the data. A multi-channel synchronous isolation acquisition mode is adopted, high-precision and high-sampling-rate data acquisition of multiple groups of analog quantities and multiple groups of digital quantities is supported, the anti-interference capability is high, and data acquisition parameters are flexibly configured.

The embodiment of the invention discloses a bandwidth duration ratio determination method and device, equipment and a computer readable medium. A specific embodiment of the method comprises the following steps: in response to receiving device information sent by a target terminal, performing registration authentication on the target terminal by using the device information, the device information comprising a target network bandwidth, and the target terminal being a terminal executing an audio and video service; acquiring a channel utilization rate of the target channel; in response to determining that the channel utilization rate meets the preset condition, determining a to-be-allocated bandwidth duration ratio of a target wireless access device which is a wireless access device connected with the target terminal; and determining the bandwidth duration ratio of each terminal connected with the target wireless access equipment according to the target network bandwidth and the to-be-allocated bandwidth duration ratio. According to the embodiment, the transmission real-time performance of the data message of the audio and video service can be improved, and the audio and video jamming condition is reduced.

The embodiment of the invention discloses a network flow control method and device. The method applied to a client comprises the following steps: receiving data packets which are sent by different data packet supply nodes and are specific to the same target stream, wherein each data packet carries a data packet lagrange multiplier which is specific to the target stream, to which the data packet belongs, and corresponds to the data packet supply node which sends the data packet; extracting the data packet lagrange multipliers from the received data packets; according to all the extracted data packet lagrange multipliers, calculating a first sending rate of each data packet supply node for the data packet of the target stream to which the data packet belongs; for each data packet supply node, according to the first sending rate corresponding to the data packet supply node, calculating a second sending rate for sending an interest packet to the data packet supply node; and sending the interest packet to each data packet supply node at the second sending rate, so as to control the network flow. By the implementation of the network flow control method, the network resource utilization rate in an NDN (Named Data Networking) is increased.

The invention discloses a method and system for large-scale parallel real-time transmission of Beidou satellite navigation signals. The method of the invention constructs a large-scale parallel signal transmission branch, carries out large-scale grouping of satellite navigation messages according to the structure, and sequentially sends them into parallel signal transmission branch, using a complex number shift pseudo-random code generator to obtain the sub-ranging code dedicated to the parallel transmission branch of the navigation satellite, respectively spread the navigation message of each branch, first modulate with the same carrier with different frequency offsets, and then convert all branch The carrier modulation navigation signal is superimposed and noise is added to form a composite satellite navigation signal, and finally it is sent through a single antenna, and the receiving end uses a single antenna to receive the received navigation signal according to the branch. Parallel to serial, realize real-time navigation and positioning of the Beidou satellite navigation system by obtaining navigation messages. The invention can be widely used in satellite navigation systems, and can also be used in various ranging systems, communication systems, radio and television systems and control systems.

The invention discloses a high-speed semiconductor optical communication chip based on 5G network communication, which comprises a system control module, a radio frequency signal processing module, an MCU chip and a 5G module, and is characterized in that the system control module is connected with the radio frequency signal processing module and the MCU chip, the MCU chip is connected with the 5G module, an embedded operation system is installed in the MCU chip, and the embedded operation system is connected with the system control module. The MCU chip is internally provided with a power supply module and the power supply module is connected with the 5G module, so that the transmission speed of the chip is increased, the network delay is reduced, the area of the communication chip is reduced, and the manufacturing cost of the communication chip is reduced.

The invention relates to a wireless network multichannel combination communication method. The method includes that S1, networking is performed on concentrators by a master station, and adjacent concentrators use different communication channels; S2, networking is performed on collectors by the concentrators, and adjacent collectors use different communication channels; S3, networking is performed on a terminal device by the collectors, the collectors use basic channels to send networking instructions in a broadcast mode to the terminal device, the terminal device receives the commutation channels of the collectors after networking succeeds, and the collectors and the terminal device are communicated with each other. The wireless network multichannel combination communication method has the advantages that multiple basic channels and wide basic channels are used for spacing, so that same frequency interference is avoided, mistaken awakening to the terminal device is prevented, power consumption of the terminal device is reduced and service life of the terminal device is prolonged; the adjacent collectors use the different communication channels, so that competition on the same channel during automatic data sending of the terminal device is lowered, real-time performance of network transmission is improved, system concurrent processing ability and system throughput are improved.

The invention relates to a frequency selection method, device, computer equipment and storage medium based on short-wave communication. The method includes: determining a communication frequency band corresponding to the communication parameter according to the communication parameter; the communication parameter includes a communication distance parameter and a communication time parameter; Frequency band, determine the initial call frequency; control the master station to send empty data packets to the slave station according to the initial call frequency; determine the communication frequency between the master station and the slave station according to the response message sent by the slave station. The method improves the transmission real-time performance of determining the communication frequency, and improves the efficiency of determining the communication frequency between the master station and the slave station.

The invention relates to a system for the transmission and display of at least two video signals, said system comprising: an encoder, a decoding and display unit, and a screen, the encoder receiving the input of the video signal, and the screen receiving the input of the decoding and display unit; The encoder performs clearing processing on the covered area of ​​the current frame of the received video signal according to the information corresponding to the covered area of ​​the video window of the video signal on the screen, and then encodes the current frame after the clearing process; the encoder The coded content is also packaged into a video stream, and the video stream is sent to the decoding and display components through the network. The invention can eliminate or reduce the memory space required for coding in the covered area of ​​the video window, reduce the bandwidth of the transmission process, eliminate redundant data, and improve the real-time performance of transmission.

The invention discloses an implementation method of a network audio selection source based on FFmpeg, which comprises the following steps of: registering various audio and video codecs, multiplexers and filters, simultaneously opening a plurality of paths of network audio sources, selecting a proper audio encoder according to a novel audio, extracting a single sound channel, and carrying out confluence playing by using a proper audio filter. The multi-channel network audio selection output scheme based on ffmpeg is realized, the multi-channel audio transmitted from the network can be combinedand output, the transmission real-time performance is very high, and the multi-channel audio collection output requirement in practical application can be met.

The invention belongs to the technical field of cloud data center network transmission flow scheduling, discloses a short-flow real-time optimization method, system, and network transmission terminal, and constructs a reinforcement learning framework for a data center short-flow real-time optimization method; data center network flow feature acquisition , used to monitor traffic characteristics in the data center and generate traffic size distribution; multi-level queue demotion threshold initialization, calculate the multi-level queue demotion threshold according to the data center internal traffic size distribution characteristics; threshold dynamic adjustment, used for fine-grained dynamic adjustment threshold size In order to adapt to the change of data center traffic size, realize the priority transmission of data packets. The invention realizes adaptive matching of traffic size and transmission based on the reinforcement learning threshold, reduces the transmission delay of interactive real-time short traffic, improves the delayed transmission of long traffic with high bandwidth requirements in the queue, and improves the real-time performance of network transmission.

The present invention discloses a pulse power supply real-time control system based on a reflective memory network and a DSP controller, comprising a reflective memory network, wherein the reflective memory network comprises a reflective memory switch and more than one node unit connected with the reflective memory switch; at least one node unit comprises a DSP controller, the DSP controller is used for acquiring various state signals of a pulse power supply in a current transformer apparatus, and is connected with a current transformer main circuit, the DSP controller achieves control and protection functions with the reflective memory switch through a reflective memory card. The pulse power supply real-time control system of the present invention has the advantages of capacity of improving transmission real-time performance, transmission delay determinacy and reliability of data and commands in the control system, etc.

The invention relates to a 5G-based unmanned aerial vehicle multi-channel video transmission and splicing system. The 5G-based unmanned aerial vehicle multi-channel video transmission and splicing system comprises four subsystems, namely an unmanned aerial vehicle video data acquisition and transmission subsystem, a 5G public network communication subsystem, a server subsystem and a user subsystem. According to the invention, an overall system architecture combining unmanned aerial vehicle multi-channel video real-time transmission and a video stitching technology is constructed, high-real-time transmission of multi-channel video data is realized by utilizing the characteristics of high speed, large bandwidth and low time delay of a 5G technology, and a high-quality video stitching technology is realized at a server side. The problems of limited power of transmitting equipment, high power consumption, limited endurance time, limited communication link bandwidth and the like of unmanned aerial vehicle video transmission services under 4G communication conditions are solved, a new solution for unmanned aerial vehicle video acquisition services is provided for users, real-time video stitching of multiple paths of video streams is realized, and a support is provided for development of unmanned aerial vehicle video acquisition business in the future.