39results about How to "Low latency transmission" patented technology

Provided are a method and device for transmitting control information in a wireless communication system. In particular, a downlink resource block group including a downlink resource block in a downlink frequency bandwidth is set, and an uplink resource block group including an uplink resource block in an uplink frequency bandwidth is set. If the downlink frequency bandwidth is smaller than the uplink frequency bandwidth, the downlink resource block group is mapped to the uplink resource block group. The ratio of the number of uplink resource blocks to the number of downlink resource blocks is set so that the number of uplink resource block groups and the number of downlink resource block groups become the same. The uplink and downlink resource block groups are mapped according to the ratio. Control information on the mapping is transmitted through the downlink resource block groups.

A method for transmitting a video signal from an application running on a server over an IP network to a client device. The application is drawing its content, in a plurality of sequential drawing events, into a virtual frame buffer. Simultaneously, each drawing event is registered in a list of drawing events and each drawing event is associated with an address (location) of each area that was affected by this drawing event. The list is repetitively checked and if any area have changed since previous periodic check, such area is retrieved, segmented into blocks of standardized size and transmitted, together with its address in a frame, over the IP network to the client. On the client side the encoded blocks are received and combined, using the address data, into frames of an encoded video stream that can be directly fed into an industry standard decoder of client device.

The present invention generally relates to systems and methods for determining and analyzing sport related activities in conjunction with low latency transmission and processing. Specifically, embodiments of the present invention utilize sensor units placed on participants in a sporting activity in order to identify actions and / or movements made by the participants and analyze those actions and / or movements. In certain embodiments, the system is further configured to transmit the analyzed data associated with those actions and / or movements such that a group of end users (e.g., broadcast viewers, users of a mobile application) can consume the data in real time or near real time.

The invention provides a low-delay transmission based multi-route establishment method and a multi-route parallel data transmission method of a wireless sensor network. The multi-route establishment method comprises the following steps: judging whether existing routes arriving at the destination node exist by a forwarding node; retaining the existing routes and carrying out bidirectional route confirmation if the existing routes exist; further judging whether the new routes exist if the existing routes do not exist; and further establishing multiple routes. The data transmission method comprises the following steps: selecting a plurality of routes containing least nodes from a plurality of established routes and simultaneously transmitting data; a source node detecting the state of each route and transmitting the data packet to be transmitted to a destination node along the route which is free in advance until all the data are transmitted. The two methods of the invention reduce the data transmission time and realize low-delay transmission of the data from the source node to the destination node.

Provided are a method and an apparatus for transmitting retransmission data using an HARQ in a wireless communication system. Specifically, it is determined whether there is a radio resource for transmitting retransmission data. When the radio resource exists, a DCI format including a retransmission indicator field is configured. The retransmission indicator field indicates whether the retransmission data is general retransmission data or opportune retransmission data. The opportune retransmission data is retransmitted before an ACK / NACK signal for initial transmission data is received. The retransmission data is transmitted through the radio resource according to scheduling of a configured DCI format.

In order to allow priority transfer (fluctuation) over VLL packets while keeping each contracted bandwidth constantly, a leaky bucket model is expanded to have a threshold 1509 for permitting transmission of a packet (e.g. a WFQ packet) other than an LLQ packet and a threshold 1501 (larger than the threshold 1509) for permitting transmission of the LLQ packet (two-threshold leaky bucket model). In this manner, even when a WFQ cannot be transmitted, an LLQ can be transmitted with priority. In addition, while the total bandwidth of the WFQ and LLQ, i.e. the bandwidth of the VLL contains fluctuation, the contracted bandwidth can be complied with. The circuit of the model is provided in LLQ and WFQ transmission appointed time calculating circuits so as to calculate respective transmission appointed times so that an LLQ / WFQ is selected and a packet is selected based on the times considering priority.

The embodiment of the invention discloses a remote control method, device and system, equipment and a storage medium, and belongs to the technical field of terminals. The method comprises the following steps: sending a remote control request to second terminal equipment in an online state through an equipment online server; in response to the fact that the second terminal device receives the remote control request, a secure data channel is established with the second terminal device through the signaling server, and the secure data channel is established based on WebRTC; receiving video data sent by the second terminal device through the security data channel; decoding the video data, and restoring and displaying a screen picture at the second terminal equipment; and in response to the control operation in the restored screen picture, sending control data to a second terminal device through the security data channel, the second terminal device being used for responding to the control operation in the screen picture according to the control data. According to the embodiment of the invention, screen sharing and remote control among different platform terminal devices are realized based on WebRTC, and the real-time performance of remote control is improved.

The invention discloses a video signal seamless low-delay switching method and system. The method mainly comprises the following steps thatafter receiving a video input signal switching instruction, afirst FPGA receiving module continues to receive the last frame of video image of the first video input signal and caches the last frame of video image to the DDR module; then, the video input signalswitching instruction is sent to an MCU module to serve as a video input signal switching ready instruction; and the MCU module receives the video input signal switching ready instruction, immediately switches the video picture of the second video input signal to the first FPGA receiving module after receiving the video input signal switching ready instruction, and continuously outputs the last frame of video picture of the first video input signal until the second video input signal is ready. The system is composed of a video input signal, an FPGA sending module, an optical switching matrixmodule, an FPGA receiving module and a terminal display device. According to the method and the system, seamless and low-delay transmission of the video signals is realized, and better user experienceis brought.

The invention discloses a variable bit rate service scheduling method based on gate control. The method comprises the steps that firstly, according to constant bit rate service characteristics, the link transmission time of the constant bit rate service is calculated; a basic transmission window is determined, and then the average rate of the variable bit rate service is obtained through statistical prediction within the basic transmission window time; the link transmission time corresponding to the variable bit rate service is further obtained; finally, the size of the basic transmission window is dynamically adjusted; the scheduling window time supporting the variable bit rate service is determined; and the gate control list simultaneously supporting the transmission of the constant bitrate service and the variable bit rate service is generated. The hybrid real-time scheduling and deterministic transmission of the two types of time sensitive services are realized, and the transmission delay of the time sensitive services is reduced.

A method of low-latency audio transmission in a mobile communications network utilizing first data frames or subframes encoded according to a first format and shorter second data frames encoded in another second format for audio data. An audio transmission system includes a terminal, a base station, and an audio receiver. The terminal transmits via an uplink audio data that are encoded in the second format and other data that are encoded in the first format. The audio receiver directly receives the audio data transmitted via the uplink. The encoding / decoding of the audio data of one of the second data frames is influenced by other audio data of the same second data frame but not by audio data of another second data frame. Audio transmission from the terminal to the audio receiver is effected in the allocated time slots and frequencies in a waveform in conformity with the mobile communications network.

A receiver includes a receiving section that receives communication packets transmitted from a transmitter, which transmits the communication packets each including encoded data, and an image header, sequentially from the encoded data corresponding to the beginning of an image, a first accumulating section that accumulates the encoded data and the image header included in each of the received communication packets, a detecting section that detects a picture header transmitted together with the encoded data corresponding to the beginning of the image, from the image header of each of the received communication packets, in a predetermined observation interval, a second accumulating section that accumulates the detected picture header, and a control section that reads out the picture header accumulated in the second accumulating section, and causes the picture header to be accumulated into the first accumulating section, if the picture header is not detected within the observation interval.

A receiver is configured to receive and process a radio signal. The radio signal includes a first frequency band including a first signal, the first signal including a plurality of TDD-frames. The receiver is configured to evaluate reception of downlink data to obtain evaluation data. The receiver is further configured to transmit the evaluation data in a second frequency band outside of the first frequency band.

The invention provides a video data transmission method and device and electronic equipment, and the method comprises the steps: splitting any frame of video data to be transmitted into a plurality of data split packets; adding packet header information to each data split packet in the plurality of data split packets, and sending the data split packets added with the packet header information to a receiving end device; before the transmission time of the frame of video data reaches a single-frame video data transmission time threshold value, if it is determined that data split packets are lost in the multiple data split packets, retransmitting the lost data split packets; if it is determined that the plurality of data split packets are all successfully sent, ending the sending of the frame of video data; when the transmission time of the frame of video data reaches a single-frame video data transmission time threshold, ending the transmission of the frame of video data. According to the method, the data transmission efficiency can be improved, and low-delay transmission of the video data is realized.

The invention discloses a power line communication routing method and device. The method comprises the following steps: calculating a path weight between relay nodes in a power line communication network; calculating a first optimal routing path of the power line communication service by adopting a K shortest path algorithm according to the path weight; and selecting the first optimal routing path meeting the node routing condition for routing. According to the invention, high-capacity reliable operation and low-delay transmission of the service of the power line carrier communication network can be ensured.

The invention discloses a transmission control method of bidirectional voice and operation control data and a system thereof. A control terminal and a host are included. The control terminal comprises a sampling module, a playback module, a terminal audio encoding and decoding module, a button control module and a terminal transmission module. The host comprises a host analysis module and a host transmission module. The host transmission module is connected to the host analysis module. The terminal transmission module is connected to the host transmission module and the button control module respectively. The sampling module generates a voice simulation signal. The terminal audio encoding and decoding module encodes the voice simulation signal into a voice digital signal and packs into a voice packet. The button control module generates operation control data. The terminal transmission module establishes a time sharing reuse mechanism to carry out queuing transmission on the voice packet and the operation control data, and cooperates with the host to schedule all the control terminals. A low delay transmission problem to a large data flow under a narrow bandwidth is solved, and synchronous transmission of the bidirectional voice and operation control data of multiple users during concurrent connection can be effectively guaranteed.

The invention relates to the Bluetooth earphone technology, and discloses a TWS earphone system low-delay transmission method, device and equipment and a storage medium, the TWS earphone system comprises a wireless earphone and a charging box, and the method comprises the following steps: detecting the overall state of the charging box; when it is detected that the charging box is inserted into the third-party device through the USB, establishing a low-delay Bluetooth connection between the charging box and the wireless earphone; when the low-delay Bluetooth connection is successful, the charging box receives an audio sent by the third-party device, encodes the audio into a low-delay encoding format, and sends the audio to the wireless earphone; and the wireless earphone decodes and plays the encoded audio frequency. According to the invention, low-delay audio transmission between the wireless earphone and the third-party equipment can be realized.

The invention belongs to the technical field of wireless video transmission, and particularly relates to an unmanned aerial vehicle low-cost image transmission transmitting device and an image transmission method. According to the low-cost image transmission transmitting device and method for the unmanned aerial vehicle, an analog image transmission technology is adopted, low-delay transmission ofvideos is supported, and the delay is smaller than 50 milliseconds; remote transmission is supported, the transmission distance is usually not less than one kilometer, and the specific distance is determined according to a test environment and a receiver; key switching transmission frequency channels are supported, and multiple persons use the device at the same time without interference. Key switching transmitting power is supported to be used for different distance application occasions.

The invention provides a cross-terminal picture transmission method and system, which are applied to a first terminal and a second terminal, wherein the first terminal carries a robot operation system, and the second terminal carries a preset deep learning network model. Comprising the following steps: a data forwarding node on a second terminal stores a picture from a data stream of a robot operating system to an exchange space in real time according to a picture dislocation storage mode, and a deep learning program of a preset deep learning network model reads and processes the picture from the exchange space according to a picture dislocation reading mode. According to the invention, a picture dislocation storage mode and a picture dislocation reading mode are provided, file read-write conflicts in the high-speed data transmission process can be avoided, and file read and write are operated in parallel in different processes, so that final low-delay transmission is ensured.

The invention provides a de-differentiated data acquisition system and method, and relates to the technical field of network communication, the system comprises a plurality of data acquisition services, all the data acquisition services form a net structure, each data acquisition service is a node of the net structure, the adjacent nodes are connected with each other, each data acquisition service is used for acquiring data and forwarding the data, and after the data acquisition services receive the data, the data are abstracted and serialized to form data reading and writing ports serving multiple protocols.According to the invention, dedifferentiated data acquisition strategies in different data acquisition services are adopted, so that the same data interface mode for accessing multiple industrial devices is realized.

The invention discloses a data transmission method and device, equipment and a storage medium. The method comprises the following steps: acquiring an Ethernet frame sent by a network card at a sending end, and analyzing the Ethernet frame according to a data protocol format to obtain analyzed data; according to a preset monitoring rule, judging whether the analyzed data is target monitoring data based on a transmission control protocol; if the analyzed data is the target monitoring data, processing the analyzed data according to a preset processing rule, and transmitting the processed data to a packing module; if the analyzed data is not the target monitoring data, transmitting the analyzed data to the packing module in a transparent manner; packaging the received analyzed data and the processed data by using the packaging module, and transmitting the packaged data to a corresponding receiving end network card. Transparent and low-delay transmission of data can be realized, and data processing is carried out on target monitoring data based on a transmission control protocol.

The invention discloses a signal processing method based on Classic BT (Bluetooth for short) communication. An Optek Link is added through an LMP layer, so that various receiving and transmitting modes are perfectly compatible, the method is not unlimited to a fixed transmit-receive mode, more convenient connection is achieved, wherein TX is a sending signal, and the RX is a received signal; an Optek Link technology is adopted; the chip can set a random conversion transceiving model, THE transmit-receive mode is not liminted, broadcast connections are achieved, the connection of multiple pathsof Bluetooth devices is achieved, the compatibility is better, and the connection is more convenient; the signal processing method of Bluetooth communication generally supports an ACL / SCO / BLE protocol, and the method provided by the invention cannot limit a transceiving model, is connected with a Bluetooth device, can be applied to broadcast multi-path connection, can be compatible with connection of different transceiving models, and can realize low-delay transmission.

The invention relates to a 4K image lossless packaging low-delay transmission method based on a 10-gigabit network. The method comprises the following steps of: splitting and packaging an acquired 4K image into a plurality of continuous data packet units according to a set duration; combining the adjacent N data packet units to obtain a plurality of data packet groups, and performing time-sharing data transmission based on the 10-gigabit network by a plurality of network units; after receiving the first data packet group, de-encapsulating a plurality of data packet units in the first data packet group and adding the data packet units to corresponding positions in a playing queue by the receiving end, and enabling a playing function when the first position in the playing queue is not empty; and continuously receiving the data packet group and checking the corresponding position of the added playing queue by the receiving end; According to the 4K image lossless packaging low-delay transmission method, time-sharing transmission is carried out based on a 10-gigabit network transmission technology in combination with the plurality of network units, and repeated grouping is carried out after image processing, so that the transmission speed can be guaranteed, and the reliability and the stability of decapsulated data can be considered at the same time.

The invention provides a light-vision fusion integrated system, and the system comprises a laser radar, a camera and a data processing unit, the laser radar and the camera are connected with the data processing unit, and the data of the laser radar and the camera are subjected to the preliminary data analysis through a point cloud processing algorithm module and an image processing algorithm module; the PTP timing service device performs timing on the laser radar, the camera sensor and the core processor to realize synchronous calibration of frame rates of the laser radar, the camera sensor and the core processor; then space calibration is carried out through a space calibration algorithm module, and bottom layer fusion of data detected by the laser radar and the camera sensor is achieved; the event analysis logic module compares the traffic participant information with preset traffic event logic information, and if the information is inconsistent, parking practice is automatically reported; and the data configuration and forwarding module is used for uploading the original data of the sensor and the sensed event information to a terminal user platform.