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148 results about "Information delay" patented technology

Data retransmission method and device

The invention, which relates to the communication field, provides a data retransmission method and device. The method comprises: after a real-time data packet is sent to a server, the real-time data packet carrying a packet serial number to a first cache region; and when response information that is returned by the server and corresponds to the packet serial number of the real-time data packet is not received within a first time threshold, the real-time data packet corresponding to the packet serial number in the first cache region is retransmitted to the server by a retransmission thread. In the prior art, the data transmission success can not be guaranteed and the packet loss probability is high according to the TCP protocol retransmission mechanism. However, according to the data retransmission method provided by the invention, a retransmission work mechanism asynchronous with the TCP transmission protocol is employed; and thus the response information for first-time data packet sending and receiving is in an asynchronous working process, so that next data can be sent without the need to wait for receiving the response information of the last data packet. Therefore, a phenomenon of data sending waiting caused by data packet and response information delay due to network congestion can be avoided, so that the real-time and rapid properties of data are enhanced.
Owner:迈锐数据(北京)有限公司

System, device and method for MIMO base band processing

ActiveCN101123594ABest Joint Design PerformanceAvoid tedious repeated searchesSpatial transmit diversityBaseband system detailsEngineeringPairwise error probability
The invention relates to a multiple input and multiple output (MIMO) system, in particular to a MIMO system baseband processing system and a device and a method of a transmitter baseband processing. Therein, the transmitter baseband processing device comprises a self-adaptive space time block coder. The invention is characterized in that the self-adaptive space time block coder is a structure, which is formed by a combined design of a linear space time block code (STBC) and a pre-code. The invention also comprises an off-line look-up table, which is generated according to a combined design standard. The combined design standard is an upper limit sum of pairwise error probability (PEP) between a sending codeword and other codeword in a constellation set, which represents information delay and quantization error in a feedback channel state. The invention is provided with an off-line pre-code and linear STBC combined design coding design process and an effective realization of a transmission scheme through using the look-up table. Furthermore, the invention can adopt a gradient searching art, which uses a global data optimization algorithm SGA to substitute a local optimization algorithm. The invention can also avoid the redundant and repeated searches with different initialization.
Owner:ALCATEL LUCENT SHANGHAI BELL CO LTD

Information processing method, device and equipment

The embodiment of the invention provides an information processing method, device and equipment, and relates to the technical field of communication. The information processing method comprises the following steps: monitoring whether a target application receives virtual currency award information or not; when monitoring that the target application receives the virtual currency award information, acquiring iris characteristics of a present user, and verifying the iris characteristics; after the iris characteristic verification is qualified, triggering acquisition operation on the virtual currency award information of the target application. The problems that a user needs to enter an application red envelop scrambling interface firstly and click to open the red envelop, the operation is relatively tedious, and moreover the time for acquiring the virtual currency award information is relatively long through manual operation, information cannot be acquired in time possibly and information delay can be caused are solved, and beneficial effects that the user does not need to enter corresponding interfaces to acquire the virtual currency award information through manual operation can be achieved, the time for acquiring information can be shortened for the user, and the virtual currency award information acquisition efficiency is improved are achieved.
Owner:BEIJING ANYUNSHIJI TECH CO LTD

Self-adaptation adjustment method of load balancing information interaction periodicity

InactiveCN101600226AReduce overheadImprove load balancing success rateNetwork traffic/resource managementLTE AdvancedSelf adaptive
The invention discloses a self-adaptation adjustment method of load information sending periodicity, mainly solving the problems of load information delay caused by adopting a fixed periodicity for load information interaction and unnecessary overhead of signalling in an LTE-Advanced system. The invention proposes that an adjacent base station and a source base station negotiate to self-adaptively adjust resource status update sending periodicity, including the following specific steps: 1, the source base station sends a resource status request to the adjacent base station, and the adjacent base station returns a respond according to self capacity and returns load information in a fixed periodicity; 2, the adjacent base station proposes a periodicity reconfiguration request of resource status update return periodicity according to self load variation rate; 3, the source base station returns a respond according to self condition; 4, the adjacent base station returns resource status update in a new periodicity; 5, the source base station sends a resource status report stop message, and the adjacent base station returns a respond and finishes resource status report. The invention has the advantages of high load balancing successful rate and saved radio resource and is used for load information interaction in load balancing.
Owner:XIDIAN UNIV

AUV collaborative navigation method based on non-linear information filtering

The invention discloses an AUV collaborative navigation method based on non-linear information filtering. According to the AUV collaborative navigation method based on non-linear information filtering, an unscented information filter of a distributed structure is adopted for positioning in collaborative navigation process; in collaborative positioning process, a state equation and a measurement equation of an AUV navigation system are established firstly, unscented information filtering is adopted so as to obtain main AUV state information, state information expansion is carried out in data pack transmission, unscented information filtering is adopted to realize evaluation on subordinate AUV states, data pack information is subjected to treatment in data pack receiving; and at last navigation information obtained via information filtering of the main and subordinate AUV. The AUV collaborative navigation method is capable of avoiding low AUV positioning accuracy caused by information delay in underwater acoustic communication, information relativity problems caused by information transferring among AUV are taken into consideration fully, and are solved through Information marginalization method, so that navigation information dispersion is avoided, and collaborative navigation high precision real-time positioning of targets is realized.
Owner:HARBIN ENG UNIV

Two-dimensional DOA (direction of arrival) angle estimation method based on antenna uniform planar array

The invention discloses a two-dimensional DOA (direction of arrival) angle estimation method based on an antenna uniform planar array, and mainly solves problems of slow response speeds in target detection and passive location and big estimation errors which are caused by large computation amount of direction angle estimation in the prior art. The method comprises realization steps of forming a uniform planar array by using antenna receivers; calculating echo signals of all the antenna receivers; calculating noise subspaces of the echo signals of the antenna receivers; substituting a one-dimensional angle which is set to be a fixed value into an angle solving function to obtain another one-dimensional angle value, and obtaining multiple groups of values through multiple computations; generating an amplitude spectra by using the multiple groups of angle values; and obtaining two-dimensional angle values of the antenna uniform planar array by searching peak points in the amplitude spectra. According to the method, the two-dimensional DOA angle estimation is simplified into a process of one-dimensional DOA angle estimation, and thus the computation amount is substantially reduced, speeds in target detection and passive location response are improved, parameter estimation errors caused by information delay are prevented, and accordingly the method can be applied to rapid target detection and passive location.
Owner:XIDIAN UNIV

Vehicle motion state information delay compensation method and device

The present invention discloses a vehicle motion state information delay compensation method and device. The method comprises the steps of: obtaining first moment motion state information comprising afirst moment displacement, a first moment speed and a first moment accelerated speed of vehicles around; predicting and obtaining second moment motion state prediction information of the vehicles around posterior to the first moment according to the first moment motion state information and a motion state equation obtained based on a current statistic model; and performing compensation to obtainsecond moment target motion state information of the vehicle around according to delayed time, the second moment motion state prediction information and a delay compensation algorithm obtained based on a displacement-speed relation and a speed-accelerated speed relation. The delay compensation algorithm performs certain delay compensation of the second moment motion state prediction information toobtain more accurate second moment motion state information so as to allow the vehicles to timely regulate the vehicle driving strategies themselves according to the accurate motion state informationand improve the vehicle driving safety.
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI

Internet of things agent data processing method and system and power grid terminal equipment monitoring system

The invention provides an internet of things agent data processing method and system based on electric power internet of things and a power grid terminal equipment monitoring system based on electricpower internet of things. The internet of things agent data processing method comprises the following steps that monitoring data of a great deal of power grid terminal equipment are received; a condition strategy request is generated according to analysis of the monitoring data, and sent to a background processing system; instruction information fed back by the background processing system according to the condition strategy request is received; and according to the instruction information, designated monitoring data are obtained from the monitoring data, and the designated monitoring data areanalyzed to generate an analysis result. The functions of data marginalization processing and monitoring data processing of power grid terminal equipment in a preset area are realized, the situationssuch as information delay and loss caused by transmitting all the monitoring data to the background processing system for processing are avoided, processing efficiency of the monitoring data is improved, potential safety hazards existing in the terminal equipment can be found in time, and a data basis is provided for safe operation of a power system.
Owner:GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2

Vehicle travelling state broadcasting method and apparatus, and vehicle-mounted terminal

The invention discloses a vehicle travelling state broadcasting method and apparatus, and a vehicle-mounted terminal. The vehicle travelling state broadcasting method is applied to Internet of Vehicles vehicle state broadcasting, and the method comprises the following steps: judging whether the travelling state of a vehicle is stable; if it is judged that the travelling state of the vehicle is notstable, performing vehicle information broadcasting at a first preset broadcasting period T; if it is judged that the travelling state of the vehicle is stable, continuing to judge whether the vehicle is in a slow travelling state; when it is judged that the vehicle is in the slow travelling state, judging whether the vehicle is continuously in the slow travelling state according to a preset judgment period, and if so, gradually prolonging the broadcasting period until to a first broadcasting period upper limit T1max, and if it is judged that the travelling state of the vehicle is not stableat the preset judgment period, performing vehicle information broadcasting at the first preset broadcasting period T, wherein T1max is greater than T1. The broadcasting period can be adjusted in timewhen the travelling state of the vehicle changes, thereby reducing the communication channel load, reducing the probability of channel blockage, reducing the packet loss rate and shortening the information delay.
Owner:东软集团(北京)有限公司

Method and device for obtaining building demolition amount in transmission line corridor

InactiveCN107393004ASolving Area Statistics ProblemsAccurately measure demolition areaImage enhancementImage analysisPoint cloudRadar
The present invention provides a method and device for obtaining a building demolition amount in a transmission line corridor. The method comprises a step of obtaining laser radar point cloud data of buildings in the transmission line corridor and carrying out filtering processing, determining ground point cloud data and non ground point cloud data, and determining height data corresponding to different objects on a ground according to the above two data, and a step of detecting building data from the height data of different objects on the ground according to the shape characteristics, geometric characteristics and height characteristics of the buildings, and thus determining the demolition amount of the buildings. Based on laser radar and the geometric characteristics of the buildings, the complex building data can be quickly and accurately obtained, and the demolition amount of the buildings is calculated. A building area statistics problem in the transmission line corridor in the conditions of the lack of spectrum image and planning and design drawing information delay is solved, the time cost and manpower cost in manual inspection are greatly reduced, and the method and the device can be applied to the precise measurement of a building demolition area and have a high use value.
Owner:BEIJING GREEN VALLEY TECH CO LTD

Unmanned aerial vehicle cluster block chain communication method

ActiveCN110401620AEnsure cluster communication securityAvoid the situation of altering and destroyingEncryption apparatus with shift registers/memoriesUser identity/authority verificationUncrewed vehicleInformation delay
The invention discloses an unmanned aerial vehicle cluster block chain communication method. The method comprises a cluster unmanned aerial vehicle. The cluster unmanned aerial vehicle is in bidirectional connection with the block unit. The cluster unmanned aerial vehicle is in bidirectional connection with the shared information collection module. The cluster unmanned aerial vehicle is in two-wayconnection with the new block creation system and the DPOS algorithm processing module, the new block creation system is in two-way connection with the DPOS algorithm processing module, and the new block creation system is in two-way connection with the shared information collection module. The invention relates to the technical field of unmanned aerial vehicle communication. According to the unmanned aerial vehicle cluster block chain communication method, the situation that the unmanned aerial vehicle is in a disconnected state due to information delay and network interruption is avoided, it is still guaranteed that the instruction of the unmanned aerial vehicle is correctly executed through the block chain communication technology, the situation that shared information of an unmanned aerial vehicle cluster is tampered and damaged is avoided, and the information and control safety is greatly improved.
Owner:GUANGZHOU BLADE INTELLIGENT TECH CO LTD

An environmental modeling capability assessment method and system for an autonomous vehicle

The embodiment of the invention provides an environmental modeling capability assessment method and system for an autonomous vehicle, and belongs to the field of intelligent transportation. The methodcomprises the following steps: obtaining environment information of a plurality of continuous frames of a vehicle environment detected by a vehicle-mounted sensing system of the automatic driving vehicle; comparing and analyzing the environment information of a plurality of consecutive frames with corresponding real environment information, judging whether one or more of information delay, information missing report and signal false report exist or not, and if yes, counting the time of the information delay and the occurrence frequency of the information missing report and the signal false report; And evaluating the environment modeling capability of the autonomous vehicle according to the information delay time, the occurrence frequency of the information missing report and/or the occurrence frequency of the signal false report. According to the method, the labeling frequency and labeling quantity of information delay, information missing reporting, information false reporting and the like are improved, and more powerful data support is provided for evaluating the environment modeling capability of the autonomous vehicle.
Owner:BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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