17results about How to "Avoid retransmission" patented technology

The invention discloses a high-definition video signal transmission system based on optical signals, relates to the technical field of video signal transmission, and solves the problems that video signals are difficult to reasonably divide, and meanwhile, signal transmission is difficult to manage and distribute in a video stream signal transmission process. And stable and safe transmission of high-definition video signals is inconvenient to guarantee. Comprising a central node, an optical fiber network and a plurality of video transmission nodes, a video signal is divided into a plurality of independent video streams, so that flexible allocation according to network bandwidth and node performance is facilitated, and the overall transmission efficiency is improved; the compressed independent video stream can be transmitted more quickly through a network, so that the waiting time of a data packet is shortened, and the overall delay is reduced; different video streams can be dynamically distributed to different optical fibers according to actual requirements, so that more efficient resource utilization and load balancing are realized.

The invention relates to the technical field of image scheduling, in particular to a distributed intelligent video image scheduling system. The system comprises an acquisition processing unit which is used for collecting video image data by using a camera and preprocessing the video image data; the architecture design unit is used for deploying each node in the network; the scheduling strategy generation unit is used for analyzing video requirements in real time and distributing and managing video resources in combination with a distribution priority algorithm; and the decision execution unit is used for receiving the instruction of the scheduling strategy generation unit and executing the distribution operation of the video image data. In the distributed intelligent video image scheduling system, the network condition and the processing capability of the receiver are considered, and the loss and retransmission of the data packet are avoided, so that the data transmission efficiency and reliability are improved, the data flow can be more accurately controlled, the effective utilization of network resources is ensured, and the user experience is improved.

The present invention relates to the field of network data transmission, and in particular to an unstable link adaptive data transmission method. The present invention obtains several data packets to be transmitted and pre-detects each data packet; determines the association specificity characterization value according to the association strength and data volume of each data packet to set the priority label for each data packet; creates a transmission queue for determining the transmission order at the transmitting end based on the priority label, and sends each data packet to the receiving end through a predetermined transmission link; after receiving the data packet, the receiving end transmits back the verification data packet, determines the link stability characterization parameter based on the discrete amount of the return time of the verification data packet and the mean value of the return time, and determines whether the transmission link enters an abnormal stage; in response to the transmission link being in an abnormal stage, adopts a guaranteed transmission; the present invention can adaptively adjust the transmission mode and transmission rate for the data packet in the unstable link, thereby ensuring the transmission stability and transmission efficiency.

A method of receiving, by a terminal according to one embodiment of the disclosure, a physical downlink shared channel (PDSCH) in a wireless communication system includes receiving downlink control information (DCI) for scheduling the PDSCH, and receiving the PDSCH based on the DCI. The PDSCH is related to a code word generated based on a polar code.

The invention relates to the technical field of communication, in particular to a feedback information transmission method and device, user equipment, a base station and a storage medium. The feedback information transmission method comprises the following steps: acquiring a PUCCH (Physical Uplink Control Channel) resource used for retransmitting feedback information of first service data at a moment which is separated from a moment when a transmission conflict occurs by a set duration, the PUCCH resource being acquired from downlink scheduling information included in DCI (Downlink Control Information) sent by a base station; the transmission conflict is the transmission conflict between the feedback information of the first service data and the second service data; and the feedback information of the first service data is retransmitted by using the PUCCH resource. According to the invention, in a mixed transmission scene of the first service data and the second service data, after the feedback information of the first service data is punctured or discarded, the retransmission efficiency of the feedback information of the first service data can be improved.

The invention provides a retransmission data processing method and device, and the method comprises the steps: receiving initially transmitted coding block data, recording the position information of a coding block with a wrong initial interpretation code, and storing a decoding result of the coding block with a correct initial interpretation code; and when retransmission corresponding to the initial transmission occurs, calculating time domain and frequency domain resources and pilot frequency resources corresponding to the coding block of the initial interpretation code error according to the position information of the coding block of the initial interpretation code error and configuration information of retransmission, so that only time domain and frequency domain resource data and pilot frequency data corresponding to the initial interpretation code error are transmitted when data are transmitted forwards. The retransmission efficiency can be improved, the transmission reliability is guaranteed, and the processing performance is optimized.

The present application provides a method and device for processing failed data in transit for large batches of data, and relates to the field of communication technology. The method includes: the sending end receives the data receiving response sent by the receiving end according to a preset period while continuously sending data packets to the receiving end; based on the sending time of the successfully transmitted business data corresponding to each data packet, the data packet that failed to be transmitted and the failed data that failed to be transmitted in the corresponding data packet are determined; each failed data is resent to the receiving end through one or more configured retransmission channels according to the sending time sequence of each failed data and the breakpoint retransmission mechanism. The method can retransmit the failed data that failed to be transmitted in a targeted manner, truly avoiding unnecessary retransmissions, further avoiding the waste of resources in the data retransmission process, and improving data transmission efficiency.

The present invention discloses a multi-path transmission method based on the CFDP protocol, and belongs to the field of space file transmission technology. The method of the present invention realizes parallel transmission of multiple paths and timely switching of paths after link interruption by retaining the lower-layer interfaces of multiple physical paths in a CFDP transmission transaction. The CFDP entity at the sending end selects the transmission mode according to the file nature, CPU throughput, and path information, and allocates the priority and file transmission range of each path; when the multi-path parallel transmission mode is selected, multiple physical paths are used to transmit data in parallel during the transmission process; when the multi-path backup transmission mode is selected, the path with the highest priority is used as the main path to transmit data, and other paths are used as backups; when the used path is disconnected, other paths are used to complete the transmission. The present invention effectively solves the problem that the limited bandwidth of a single path and the link interruption affect the file transmission performance, avoids the retransmission of the received files, and shortens the file retransmission time.

The application discloses a method for improving resistance to wheat scab QFhb-2DL and QFhb- 3BL The application discloses a method for improving resistance to wheat scab, a molecular marker, a primer, the molecular marker comprising a dCAPS marker of QFhb-2DL and / or a KASP marker of QFhb-3BL . The application first develops a molecular marker closely linked to QFhb-2DL and a molecular marker closely linked to QFhb-3BL . Under the premise of stabilizing the resistance to stripe rust, dwarf, large spike and multiple spike characteristics of a wheat variety in the upper reaches of the Yangtze River, the application realizes molecular design breeding by using the developed new marker closely linked to the locus, and quickly introduces the disease-resistant genotypes of QFhb-2DL and QFhb-3BL into the wheat variety in the upper reaches of the Yangtze River, breeds a strain which is resistant to scab and has a yield significantly higher than that of a control, and realizes a breakthrough in the resistance to scab in the upper reaches of the Yangtze River.

The invention discloses a mutual inductor state evaluation method and system based on cloud edge collaboration, and belongs to the technical field of mutual inductors, and the method comprises the steps: S1, collecting mutual inductance data, carrying out the preprocessing of the mutual inductance data at an edge side, obtaining first target data, judging the fluctuation value of the first target data in each first preset period, and carrying out the judgment of the fluctuation value of the first target data; if the fluctuation value is smaller than the preset value, abandoning the first target data, otherwise, executing S2; s2, slicing the first target data based on the data features and the network features of the first target data to obtain second target data, and sending the second target data to a cloud server by using private communication; and S3, inputting the second target data into a pre-trained mutual inductor state evaluation model for analysis, and then outputting the state of the mutual inductor. The problem that the real-time monitoring requirement is difficult to meet due to large data transmission quantity and long time delay is solved.

The invention relates to the technical field of obstetrical medicine cabinet information interaction, and particularly discloses an obstetrical medicine cabinet information interaction method and system based on multimode communication decision, and the method comprises the steps: analyzing the business semantics of obstetrical medicine cabinet operation data, generating a business data package with a dynamic aging weight, and employing a multimode channel quality evaluation module to evaluate the operation data of an obstetrical medicine cabinet. Integrating indexes such as signal strength, packet loss rate and time delay to generate a multimode channel quality vector; the system further couples the service emergency degree and the channel quality, generates a target routing strategy, and realizes differentiated data transmission; in link transmission control, double-link concurrent redundancy transmission and local cache delay transmission are supported, and key information is ensured to be transmitted preferentially; in addition, the system also has an emergency broadcast mechanism, and when the whole link is interrupted and the service is emergency, the key information is broadcasted through the low-power-consumption Bluetooth, so that the information accessibility under the extreme condition is enhanced; the stability and reliability of information interaction of the obstetrical medicine cabinet are improved.

The invention discloses a point-to-point pre-negotiation adaptive image transmission system and method, and the method comprises the following steps: S1, a request stage: a transmitting end A sends a communication request, and a receiving end B carries parameters to give a response; s2, in a test stage, the sending end A sends the test packets in groups until all the test packets are sent; s3, in the negotiation stage, the receiving end B obtains communication parameters through algorithm processing and informs the sending end A of the communication parameters; and S4, in a communication stage, the sending end A sends the image data to the receiving end B. According to the invention, the performance and robustness of image transmission are optimized.

The invention discloses a mountain torrent disaster early-warning short message accurate calling and signing feedback system, and the system comprises an early-warning information generation and release module which is used for transmitting early-warning information to each receiving node; the receiving node is used for receiving the early warning information; the comparison and correction module is used for comparing the difference between the index to be fed back and the feedback index to obtain the instant deviation of the receiving node; superposing the obtained instant deviation to a previous accumulated deviation value to form a deviation accumulation amount; dynamically adjusting the weight of the feedback index according to the deviation cumulant and the delay deviation; and calculating a global deviation sum according to the deviation cumulant, the delay deviation and the weight of the feedback index, judging whether the global deviation sum is lower than a set threshold value or not, and deciding to close a feedback loop or initiate information retransmission. According to the invention, whether the person in charge understands the early warning message can be accurately confirmed, and efficient response and accurate execution in an emergency scene of disaster early warning are ensured.

The present disclosure relates to a feedback information transmission method and apparatus, user equipment, base station and computer-readable storage medium. The feedback information transmission method includes: receiving the first downlink control information DCI sent by the base station after a set duration of time when the feedback information of the first service data conflicts with the second service data, wherein the priority of the first service is lower than the priority of the second service; obtaining transmission resources for retransmitting the feedback information of the first service data from the first DCI; and retransmitting the feedback information of the first service data using the transmission resources. The embodiment of the present disclosure solves the problem of retransmitting the feedback information of the first service data after the feedback information of the first service data is punctured or discarded in a mixed transmission scenario of the first service data and the second service data, so as to avoid unnecessary retransmission of the first service PDSCH by the base station.

The present application relates to the technical field of wireless communication, in particular to a wireless channel measurement time slot scheduling method under multi-wearable device concurrency. The present application periodically acquires the state and distance information of the intelligent wearable device through the base station, dynamically allocates the measurement priority, and determines the total measurement time slot quantity according to the priority. Time slot allocation is adopted, combined with the priority polling mechanism, to allocate non-overlapping AoA / CS measurement time slots for each device, and the starting time and duration are issued through the wireless control channel to guide the device to transmit the measurement signal in the corresponding time slot. The present application solves the wireless channel measurement conflict problem when multiple nodes concurrently access, and through orthogonal allocation and dynamic resource configuration, the balance between high-precision spatial perception and low-power consumption of small-sized wearable devices is considered while reducing the air interface signal collision.

The invention discloses a UART (Universal Asynchronous Receiver / Transmitter) data forwarding and synchronization optimization system and method, relates to the technical field of data transmission optimization, and solves the technical problem that the data transmission efficiency cannot be guaranteed due to the fact that data loss is not reasonably solved in the prior art. The method comprises the following steps: collecting sending data, classifying and sorting the sending data to obtain sequential read-write data, and adding a timestamp tag into the sequential read-write data; setting a double buffer area, inputting the sequential read-write data into the buffer area, and monitoring the buffer area state of the buffer area; controlling sequential read-write data transmission according to the state of the buffer area, receiving read-write completion data, obtaining a data retransmission state of the data packet based on the predicted implementation time and the actual read-write amount of the read-write completion data, and performing data feedback according to the data retransmission state. And fusing the read-write completed data and the retransmission data packet according to the data retransmission state to obtain implementation data, and matching an implementation transmission channel corresponding to the implementation data for confirmation.

The present invention relates to a method, device and system for uplink transmission and downlink reception in a wireless communication system. The present invention relates to a method for transmission and reception of a radio signal by a terminal in a wireless communication system. According to the present specification, a method is disclosed, comprising the steps of determining whether transmission of an uplink radio signal assigned to a terminal or reception of a downlink radio signal is possible on a time slot configured to include at least one of one or more downlink symbols for downlink transmission, one or more flexible symbols, and one or more uplink symbols for uplink transmission; and controlling the transmission of the uplink radio signal or the reception of the downlink radio signal based on the determination. According to the present invention, even if the configuration of the time slot is changed, the terminal can transmit the uplink radio signal, and thus uplink radio signal transmission omission or unnecessary retransmission of the uplink radio signal can be prevented. And by defining the valid timing of the uplink signal such as a physical random access channel, the frequency efficiency of the network can be increased and the energy consumption of the terminal can be reduced.