154results about How to "Improve data transmission quality" patented technology

A reception apparatus includes a plurality of antennas for receiving modulation signals of channels in the same frequency band, an received signal strength intensity estimation unit for estimating the reception received signal strength intensity of each reception signal, transmission path fluctuation estimation units for estimating a transmission path fluctuation of each channel of the reception signal, phase difference estimation units for calculating a phase difference of the transmission path fluctuation estimation signal of a predetermined channel of each antenna and outputting it as a phase difference signal, and a signal selection unit for selecting and outputting a reception quadrate baseband signal for isolating a signal of each channel from the reception signals and a transmission path fluctuation estimation signal of each channel. Thus, by isolating and demodulating a plurality of muliplexed modulated signals received, it is possible to improve the data transmission rate.

The invention discloses a path estimating method which comprises the steps of: calculating a path quality estimating parameter according to a round-trip-delay, a packet loss probability and a congestion window of a path; dividing the path into an available path and an unavailable path according to the path quality estimating parameter; transmitting data on the available path and calculating the round-trip-delay, the packet loss probability and the congestion window of the path in a process of transmitting the data; and sending a heartbeat message in the unavailable path for calculating the round-trip-delay, the packet loss probability and the congestion window of the path. According to the invention, the path quality can be detected in real time, the path quality can be accurately calculated according to the simple parameter and the data transmission path is regulated and selected in real time, therefore the quality of the data transmission path is ensured, and the data is reliably transmitted. The path quality can be effectively estimated, and the transmission quality of streaming media data is improved.

The present invention discloses an unmanned aerial vehicle aerial photo system and method. The unmanned aerial vehicle aerial photo system comprises at least two unmanned aerial vehicles and a ground control station; the information mutual communication between the ground control station and the unmanned aerial vehicles are performed through a data transmission link; a wireless communication connection between different unmanned aerial vehicles is established through the arrangement of a mobile video base station task load device; and unmanned aerial vehicles having good channel conditions are taken as mobile communication transfer stations, and taken aerial image information is transferred to the ground control station. According to the unmanned aerial vehicle aerial photo system and method, the unmanned aerial vehicles having good channel conditions are taken as mobile communication transfer stations, therefore the problem of the poor quality of taken aerial images in the prior art is solved, and the transmission effect and the quality of the aerial images are improved.

The invention discloses a multipoint safe videoconference system with an IP set-top box based on an H.323 protocol, which comprises a videoconference client module, a videoconference transmission module and a videoconference server module; the videoconference client module comprises the IP set-top box, a digital television and an audio / video acquisition and playing device and is used for realizing the identity verification of a videoconference user and the functions of acquiring, receiving and playing an audio / video content; the videoconference server module consists of a multipoint control unit (MCU) based on the H.323 protocol and is used for realizing functions of conference management, the integrity verification of the audio / video content, the identity verification of a user at a client, and the distribution and the processing of the audio / video content; and the videoconference transmission module realizes the transmission of the audio / video content between the user participating in a conference and a videoconference server by using a digital television network. According to the invention, a digital television user can realize a safe videoconference by the digital television with higher safety.

The present invention relates to communications technology. Disclosed are a data stream transmission method and device, the method comprising: when a base station determines that a UE is covered by an access point (AP) satisfying an offload condition, the base station instructs the UE to transmit all or part of the data stream via a WLAN link; the UE transmits all or part of the data stream via the WLAN link according to the offload instruction, thus achieving the cooperative transmission between a mobile communication network and the WLAN network, ensuring the capability of the user transmitting data via an optimized network, and improving the quality of data transmission.

In mobile communications systems transmission antenna diversity is used e.g. to compensate for fading caused to the signal on the radio path. It is known to make the choice of transmission antenna jointly for all subscriber connections, but it is not hereby possible to offer the optimum transmission antenna to simultaneous connections. The present invention aims at a method for implementing transmission antenna diversity on a data transmission connection, which is set up between a transmitting unit (BS), wherein there are several transmission antenna routes (ANT1, ANT2, ANT3), and a receiving unit (MS1, MS2). In the method, a broadcast signal is transmitted through all transmission antenna routes (ANT1, ANT2, ANT3) of the transmitting unit, with the aid of these signals a choice is made in the receiving unit (MS1, MS2) of the optimum transmission antenna route and a message of the choice is transmitted to the transmitting unit (BS), which transmits user data through the transmission antenna route connected for use. According to the invention, the method is characterised in that the broadcast signal of each transmission antenna route is shaped by an individual signal shaping method which is different from the others and a transmission antenna route is connected for use based on the received antenna choice message, individually for each receiving unit.

The present invention relates to a wireless mesh network and a method of frequency optimization comprising devices such as router over which the connection established with the other networks is routed, access points which act as a data transmission point in the network and client devices which use the network resources over access points; operate with the IEEE 802.11n standards compatibly and wherein the most appropriate channel is selected by monitoring the frequencies of the current and candidate channel on which the data transmission is carried out.

The embodiment of the invention discloses a data transmission method, device and equipment, and a readable storage medium. The method comprises the steps: obtaining a data packet; determining at leasttwo transmission links between a sending terminal and a receiving terminal, and obtaining link quality attributes respectively corresponding to at least two transmission links; acquiring a data attribute corresponding to the data packet, and acquiring transmission demand information corresponding to the data packet according to the data attribute; and determining a target transmission link for transmitting the data packet from the at least two transmission links according to the transmission demand information and the link quality attribute. According to the invention, the data transmission quality can be improved.

This invention discloses a method and device for the protection and recover of a backward multiplexer circuit layer which is to generate and send error bit detection signals at the EI send side and at EI circuit receiving side, when computed circuit bit error rate exceeds the given threshold, it will generate circuit worsen performance information back to the sending to stop sending efficient data to send the bit error detection signals completely, when bit error rate got from the monitor of the receiving side satisfies the requirement of the backward multiplexer, it will inform the sending end to send efficient data to use the said EI channel again.

The embodiment of the invention discloses a multimedia data transmission method and device, a storage medium and a server. The multimedia data transmission method comprises the following steps: detecting the transmission state of multimedia data during the transmission of the multimedia data, the transmission states include the blocking state and the smooth state; obtaining the initial value of the estimated bandwidth set for the multimedia data when the transmission state is smooth; adjusting the estimated bandwidth according to the initial value and the preset growth factor, and obtaining the uploading code rate of the multimedia data based on the adjusted estimated bandwidth; and sending the multimedia data according to the uploading code rate. By means of the multimedia data transmission method, the data transmission quality can be improved when the network state is better through adjusting the uploading code rate in the case of smooth network state.

The invention discloses a video multi-image synthesizing method, device and system. The method comprises that: a video processing field programmable gate array (FPGA) receives multipath videos and respectively corresponding addresses sent by a decoding module via a high-speed serial bus, and the address of each path of video is confirmed by the decoding module according to the requirement of multi-image layout; the received multipath videos are scaled, and size of each path of video after scaling is the same with that of a corresponding sub-image in multiple images respectively; each path of video after scaling is cached, and the corresponding address of each path of video after caching is corrected; and each path of video after scaling is respectively stored in corresponding memory space according to the corrected address. System resource can be saved, data transmission speed can be enhanced and image quality can be enhanced by the method.

The invention discloses an automatic gain control method and a device. The method comprises: receiving MBMS (multimedia broadcast multicast service) data at a preinstalled service time slot, and determining a gain value of the current service time slot according to an SNR (signal to noise ratio)smoothed value, a synchronizing outburst adjudication result and a CRC (cyclical redundancy check) verified result corresponding to the received MBMS data; and adjusting the gain of a receiver machine according to the gain value of the determined current service time slot. By the automatic gain control method and the device, the automatic gain control can be carried out reasonably, and the data transmission quality of the MBMS service can be improved.

The invention discloses a method for eliminating the interference of nearby regions, wherein user device UE obtains the midamble setting information of each nearby region, while the information comprises midamble shift distributing method and midamble setting parameter K, the UE according to the midabmle setting parameter K for each nearby region which midabmle shift distributing method is default obtains the relation between the midabmle shift and channel code of nearby regions, and the UE according to the relation checks relative nearby regions to obtain signal evaluation, via which to eliminate the interference of nearby regions. The invention also discloses a communicator and a TDD-CDMA communication system.

The invention discloses a dustproof server cabinet for protecting a data port of server equipment. A fixed plate is fixedly mounted at the top end of a movable plate through a connecting rod; a plurality of compression cylinders are arranged at the top end of the fixed plate at equal intervals through bolts; the top end of a damping block is fixedly connected with a dustproof plate through a bolt;a plurality of dustproof holes are formed in the dustproof plate at equal intervals; a plurality of brush mounting plates are mounted at the top end of the dustproof plate at equal intervals; a brushfor removing dust is mounted on the brush mounting plate; the movable plate drives the fixed plate to move up and down in the direction of a linear guide rail; the fixed plate drives the dustproof plate to move up and down, so as to drive a hairbrush to move up and down to remove dust from a server, thereby avoiding the blockage and data transmission caused by dust accumulation on the data port of the server, prolonging the service life of the server, and improving the data transmission quality of the server. Meanwhile, when the brush removes dust, an acting force received by the brush is transmitted to a compression column through the dustproof plate, and the compression column achieves a damping function on the dustproof plate through the elastic deformation capacity of the compressioncolumn.

The embodiment of the present invention discloses a wireless connection control method and device in an audio playing system. The method comprises the steps of using a current playing device to receive a Bluetooth data transmission request sent by a current sound source device; if the current playing device satisfies a set Bluetooth switching condition, using the current playing device to determine a target access device for the current sound source device from the other playing devices comprised by the audio playing system and a wireless router in which the audio playing system is accessed; using the current playing device to control to establish the wireless connection between the current sound source device and the target access device, so that the current sound source device transmits the audio-video data to the audio playing system via the established wireless connection. According to the embodiment of the present invention, the Bluetooth configuration operation of the audio playing system is simplified, and the playing is prevented from being interrupted effectively.

The invention provides a vehicle-mounted battery managing system applied to the technical field of electric bicycle vehicle-mounted battery managing. The vehicle-mounted battery managing system comprises a voltage collecting unit for collecting the voltage values of a battery cell, a current collecting unit for collecting the current values of charging and discharging, a temperature collecting unit for collecting the temperature values of the battery cell, a data storage unit for storing original data, a data processing unit for processing the original data to obtain secondary data, a CAN communication unit for sending the secondary data to a vehicle control unit, and a WIFI communication unit for searching for WIFI access points in real time and sending the original data to the WIFI access points. The vehicle-mounted battery managing system can effectively solve the problem that various state information of a vehicle-mounted storage battery is lost when the network breaks down. The vehicle-mounted battery managing system has the advantages of being high in data transmission speed and quality, low in cost and the like.

A method for improving the quality of data transmission in cellular radio systems utilizes time division multiple access, in which the strength of a signal received at a base station is measured and a decoder for soft decision-making is employed. The method includes measuring the strength of the signal the base station receives in at least two consecutive time slots and determining a weighting coefficient by comparing the signal strengths and reducing, using the determined weighting coefficient in a soft bit decision-making, the significance of at least one symbol at the beginning of the burst the base station receives in a time slot if the difference between the measured signal strengths is considerable.

The invention relates to a method for hiding a transmission error of eight-viewpoint free three-dimensional video, and the method provided by the invention comprises: informing an adjacent terminal of the uploading capability of each terminal at a time interval by each terminal; acquiring the adjacent terminal which owns a requested resource by a video requesting terminal through an information list of a server and acquiring the information of the terminal with high uploading capability; according to the uploading capability, and respectively receiving each viewpoint data and redundancy key data; using the terminal with high uploading capability to transmit more viewpoint data and redundancy key data; at a data sending end, performing the information source compression coding and channel error correction coding on the viewpoint data and redundancy key data which are to be sent, and then transmitting; and at the video requesting terminal, verifying the video data through the redundancy key data and hiding the error. By using the method to transmit the three-dimensional video, the use ratio of bandwidth can be efficiently increased and the deletion of video stereoscopic sense caused by abrupt error codes can be efficiently reduced.

The invention relates to the big data transmission technology, and provides a data transmission method based on interface asynchronous call, a server and a computer readable storage medium. The methodcomprises the following steps: receiving an interface call request sent by a client, wherein the interface call request comprises primary key information, a data operation type and operation timestamp information; generating an asynchronous call task according to the interface call request, and storing the asynchronous call task in an asynchronous task table; and executing the asynchronous call task in the asynchronous task table, reading data returned by an interface, and transmitting the data to the client. By adoption of the data transmission method provided by the invention, the problem of call thread obstruction during high concurrency is solved by establishing the asynchronous task table, repeated call is avoided by using the primary key information, reverse call is prevented by using the operation timestamp information, the data transmission quality is improved, and the response speed of a server is improved.

The invention discloses a virtual network card constructing method which is used for improving the quality of data transmission. The method comprises the following steps: when detecting that a first access point exists, connecting to the first access point through a first network card to form a first connection; detecting whether a second access point exists; when detecting that the second access point exists, constructing a first virtual network card; and connecting to the second access point through the first virtual network card to form a second connection. An embodiment of the invention also disclosed electronic equipment for realizing the method.

The invention provides a data transmission method, apparatus and system. The method comprises the following steps: receiving a first pilot signal transmitted by an unmanned aerial vehicle within a detection period, wherein the first pilot signal refers to a downlink signal obtained by modulating a useful signal on preset candidate frequency points, and the preset candidate frequency points comprise frequency points located in the same frequency band and / or in different frequency bands; determining a downlink working frequency point from the preset candidate frequency points according to the first pilot signal; sending a first feedback signal to the unmanned aerial vehicle, wherein the first feedback signal comprises information of the downlink working frequency point; and receiving downlink data modulated on the downlink working frequency point and sent by the unmanned aerial vehicle. Therefore, the frequency point detection in the same frequency band and / or cross frequency bands is realized to select the optimal preset candidate frequency point to serve as the working frequency point, so that the data transmission between the unmanned aerial vehicle and a remote controller is morestable, the interference of external signals is reduced, and the data transmission quality of the unmanned aerial vehicle and a ground terminal is improved.

The embodiment of the invention provides a method, a system, a media gateway and a media gateway controller for processing packet filtering rules. The method comprises the steps of: receiving a control message for instructing the media gateway to operate the packet filtering rules by a receiving pocket, and processing pocket filtering rule table items in a pocket filtering rule table according to the control message. In the embodiment of the invention, the media grate can flexibly add, modify, delete and carry out audit on all pocket filtering rule table items in the pocket filtering rule table according to the updating or audit instructions of the media gateway controller to guarantee the uniformity of the pocket filtering rules stored in the media gateway and the media gateway controller, ensure the media gateway to filter inflowing pockets safely and improve the data transmission quality.

The present invention provides provide a light power adjusting method, an optical transmitter, and an optical receiver suitable for ensuring high data transmission quality by preventing the rapid increase in SBS which occurs when the light power exceeds a predetermined value.The incident light power with which the SBS-induced backward propagating light included in the reflected light returned from the optical transmission line rapidly increases, i.e., the light power threshold is calculated.By setting the power of the light incident on the optical transmission line at a value equal to or smaller than the thus calculated light power threshold, the rapid increase in the SBS-induced backward propagating light, which is a nonlinear phenomenon of the optical fiber, is prevented.

An optical transmission module comprising at least a photoelectric element, a printed circuit board and a flexible printed circuit board is provided. The flexible printed circuit board electrically connects the photoelectrical elements and the printed circuit board. At least a ground plane is formed on the flexible printed circuit board to reduce crosstalk and electromagnetic interference. Transmission lines and impedance formed on the flexible printed circuit board solve the problems of signal distortion and impedance mismatch. The flexible printed circuit board also serves as a flexible interface to solve prior problems of connection stress between the photoelectric element and the printed circuit board.