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

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 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 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 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 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 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.