241results about How to "Improve feedback efficiency" patented technology

The invention discloses a method for feeding back HARQ, which comprises that: a sending end sends data to one or more receiving ends; a feedback mode of the receiving ends for feedback information ofthe data and/or parameters related to the feedback mode are determined according to channel characteristics, and are notified to the receiving ends. By means of the technical scheme, the feedback modeof the data is determined through the channel characteristics to reduce resources occupied by feedback channels and improve feedback efficiency and spectral efficiency of a wireless communication system.

The invention discloses a feedback method of an acknowledgment message and a terminal thereof. The method comprises the following steps: a terminal divides the acknowledgment message of a physical downlink shared channel (PDSH) which corresponds to an up subframe into M groups of predetermined values; the terminal respectively maps the acknowledgment message which corresponds to each group in the M groups of predetermined values to be the feedback message with predetermined amount according to down allocating information (DAI), wherein the acknowledgment message comprises the acknowledgment message (ACK) or the un-acknowledgment message (UACK); and the terminal feeds back the feedback message on the up subframe. The invention improves the feedback efficiency of the acknowledgment message.

Methods for WiFi beamforming, feedback, and sounding (WiBEAM) are described. Codebook based beamforming feedback signaling and sounding mechanisms for use in wireless communications are disclosed. The methods described herein improve the feedback efficiency by using Givens rotation based decompositions and quantizing the resulting angles of the Givens rotation based decompositions using a range from a subset of [0, 2π]. Feedback may also be divided into multiple components to improve feedback efficiency/accuracy. Time domain beamforming reports for taking advantage of channel reciprocity while still taking into account practical radio frequency (RF) channel impairments are also described. Beamforming feedback that prioritizes the feedback bits in accordance with the significance of the bits is also disclosed. A preamble structure to enable the use of smoothing methods for improved channel estimation, codebook designs that may be used for codebook based beamforming feedback, and multi-resolution explicit feedback are disclosed as well.

The present invention discloses a power control method comprising that: A. a special channel is arranged in the physical channel as the basic channel; B. the power of the basic channel is controlled and then the power value is obtained; C. based on the power value obtained in the step B, the powers of other channels in the physical channel are regulated. The method provided by the present invention realizes a complete power control plan in physical channel of HSUPA. In addition, the present invention also provides a power control device. With the method and the device provided by the present invention for power control, the special channel which has a large data flow is taken as the basic channel and the feedback efficiency of power control is promoted, the power control function is ensure; moreover, the use of HSUPA technology is guaranteed.

The invention provides a self-anti-disturbance sliding mode control method for a vertical rising and landing reusable vehicle. The method comprises steps of converting an attitude angle guidance instruction into a quaternion; establishing an attitude control model based on quaternion description; designing a nonlinear feedback control law; designing an extended state observer; and designing self-anti-disturbance sliding mode controller. The invention effectively avoids the singularity problem of the attitude, and designs the corresponding quaternion-based self-anti-disturbance sliding mode controller based on the attitude control model, so as to adapt to the control requirements of different actuators in different flight phases, overcome internal and external interference, and ensure highaccuracy, fast response, strong robustness and adaptive control performance, which has important research significance for the vertical rising and landing reusable vehicle recycling technology.

The invention discloses a method and a device for decoding voice data. The method comprises the following steps: receiving a voice data packet to be decoded, wherein the voice data packet contains one to a plurality of voice frames; obtaining the cutting parameter of a current searching network corresponding to a corresponding voice frame; regulating the cutting parameter of the searching network according to the decoding time delay of the corresponding voice frame; decoding the corresponding voice frame by Viterbi searching in the searching network after the corresponding cutting parameter is regulated; or, receiving the voice data packet to be decoded, wherein the voice data packet contains one to a plurality of voice frames; obtaining the cutting parameter of the current searching network corresponding to the corresponding voice frame; decoding the corresponding voice frame by Viterbi searching corresponding to the cutting parameter of the current searching network; and regulating the cutting parameter of the searching network according to the decoding time delay of the corresponding voice frame. By the method and the device for decoding the voice data, the controllability of the decoding time delay is realized by the self-adapting regulation of a searching and cutting threshold, and the practical value of a system is enhanced.

The invention provides a method for the timed sending of uplink authorization signaling, which comprises the following steps: acquiring a first uplink subframe from the subframes bound together as a subframe k; setting the uplink authorization signaling into a downlink control channel of the closest subframe before a subframe B, wherein the closest subframe has a downlink time slot, the subframe B is positioned at a subframe position of k-binding size-1, and the binding size refers to the number of the subframes bound together with the subframe k. The invention also provides a device for the timed sending of the uplink authorization signaling. The invention discloses a sending method of the uplink authorization signaling in an uplink TTI bundling transmission mode, and the feedback efficiency of a TDD system is effectively improved.

The invention discloses a power supply test system of output energy DC side feedback, including an equipment (3) to be tested, the test system includes a PFC power factor correction module (1), an AC or DC power supply module (2), an energy collecting module (4) and an energy feedback module (5); high-voltage DC bus of the PFC powerfactor correction module (1) is respectively connected with input terminal of the AC or DC power supply module (2) and output terminal of the energy feedback module (5); output terminal of the AC or DC power supply module (2) is connected with input terminal of the equipment (3), input terminal of the energy collecting module (4) is connected with output terminal of the equipment (3), output terminal of the energy collecting module (4) is connected with input terminal of the energy feedback module (5). Applying the system can improve energy recycling efficiency and reduce harmonic interference to power system greatly.

The invention discloses an electric automobile regenerative brake control method based on multi-constraint conditions. Firstly, the optimal charging current of a battery is estimated according to the state of charge (SOC) of the battery, the actual charging current of the battery is made to approach the maximum charging current curve of the battery through a current control algorithm, the maximum regenerative braking force is calculated according to the maximum charging current, and the charging efficiency is improved; secondly, regenerative braking is divided into three grades according to the amplitude of braking strength, the constraint conditions of ECE regulation on moment distribution are analyzed, the regenerative braking force is allocated on the basis of the ECE regulation according to the influences of braking force strength and a ground adhesive force coefficient on an allocation strategy, braking safety is guaranteed, influences of moment allocation, the SOC of the battery, charging of the battery and other factors on the braking process are reduced, and the energy recycling efficiency is improved to a large extent.

The invention provides a channel information feedback method and device, a terminal and a base station. The method comprises the steps that: the terminal determines feedback state parameters of channel information, wherein the channel information comprises at least one of the follows: M precoding vectors v1, v2, ..., vM, G amplitude coefficients A1, A2, ..., AG, k phase coefficients P1, P2, ..., PK, and M, G and K are all integers greater than or equal to 0; and the terminal feeds back the channel information according to the determined feedback state parameters. A problem of excessively highterminal feedback cost in the multi-path weighting or linear combination feedback in the related art is solved, the terminal can carry out feedback of the channel information in a more targeted mode,pilot frequency cost is reduced, feedback efficiency is improved, and resources are saved.

The invention discloses a flying saucer type photovoltaic cell panel cleaner and a cleaning method thereof, which belong to the field of remotely controlled flying cleaning. The flying saucer type photovoltaic cell panel cleaner comprises a cleaning system, a power system, a control system, a flying system, a communication system and a remote control system; the flying system, the cleaning system, the power system, the control system and the communication system compose a control and actuation mechanism, i.e. a cleaner host, the remote control system composes a remote control mechanism alone, signals are transmitted and received between the remote control system and the cleaner host through wireless communication modules in signal transceiver ports, the remote control system is utilized to set a route and transmit control signals, and the cleaner flies to a target cleaning position (i.e. a photovoltaic cell module to be cleaned) to perform corresponding action to fulfill a sweeping, sucking or wiping process. The flying saucer type photovoltaic cell panel cleaner has a simple structure, is convenient to maintain, is low in cost, and can conveniently clean solar photovoltaic cell panels placed at high positions.

The invention discloses a random access method, device and system for solving a large feedback overhead if the msg3 of each terminal performs ACK / NACK feedback by using an independent UL grant in a coverage enhancement scene. The method comprises the following steps: the terminal determines the RNTI dedicated to the ACK/NACK feedback and corresponding to the RA-RNTI of the terminal according to a correspondence relationship between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback; using the RNTI dedicated to the ACK/NACK feedback to detect a downlink control channel to obtain a downlink message for carrying the ACK/NACK feedback corresponding to Msg3; and acquiring the ACK/NACK feedback of the Msg3 of the terminal from the downstream message according to the location of the ACK/NACK feedback of the Msg3 of the terminal in the downlink message, thereby saving system resources.

The invention provides a CSI feedback method and a CSI feedback device in FD-MIMO communication. The CSI feedback method comprises the steps that: step 1, UE receives downlink reference signals on a first RS resource and a second RS resource; step 2, a target RS resource is determined, and the target RS resource is the first RS resource or the second RS resource; step 3, a first PMI is fed back, and a reference RS of the first PMI is the target RS resource. According to the CSI feedback method, the reference RS of the first PMI is the target RS resource, the first PMI is periodic CSI, a codebook space of the first PMI is a combined codebook, and each codon in the combined codebook corresponds to a unique PMI. By adopting the CSI feedback method and the CSI feedback device provided by the invention, the UE utilizes limited air interface resource to feed back most efficient CI information, saves expenditure of the air interface resource or to improves feedback efficiency of the CSI.

The invention provides a data monitoring method, device and a cloud platform server. The method comprises steps: multiple to-be-monitored devices are subjected to device data acquisition according toa set period, and the acquired device data are stored to a preset storage area; and if a data query request is received, based on the data query request, the device data read from the preset storage area are returned to an initiator for the data query request. According to the mode of pre-acquiring the device data according to the set period, when the data query request is received, the device data corresponding to the request need not be acquired temporarily one by one, the device data can be read directly from the preset storage area and returned to the initiator for the request, the problemof high time consumption for temporary data acquisition is avoided, the feedback speed and the efficiency of the device data are improved, and the device data monitoring efficiency of the initiator can be further improved.

The invention discloses an HARQ-ACK information feedback method. According to the invention, a UE receives DL-GRANT scheduling downlink HARQ transmission, obtains DL DAI in the DL-GRANT and determines the mapping value of each DL DAI in a time frequency binding window corresponding to an uplink sub frame feeding back HARQ-ACK; performing bit mapping of the HARQ-ACK of each HARQ feedback unit onto corresponding bit of the feedback bit sequence. The invention also discloses an HARQ-ACK information feedback device. By adopting the method and device provided by the invention, invalid HARQ-ACK bits can be removed effectively, HARQ-ACK feedback efficiency can be improved, so that UE downlink peak value rate can be ensured.

The invention relates to a wireless communication field and discloses a communication method based on MIMO and a system thereof. The invention can promotes the performance of an MIMO system under the condition of limited CSI feedback. Region to which CSI of a receiver belongs currently is notified to a sender and according to a preset, the sender uses a modulation coding proposal, a mode selection and a pre-coder corresponding to the region for transmitting the data. The sender notifies the receiver about frame numbers which starts to feed back, quantity of the feeding back frames and series number of sub-channels which need to be fed back through a request message; according to parameters in the request messaged, the receiver feeds back the series number of the sub-channels and information about the region where the CSI of the sub-channel belongs through a response message.

The invention discloses an elevator maintenance management system comprising a database server, an application server which is connected with the database server and a desktop operation system which is connected with the application server via a network; an elevator maintenance management component module based on the desktop operation system is arranged in the desktop operation system; the elevator maintenance management component module based on the desktop operation system respectively distributes accounts and passwords of authorization authority required by respective responsibilities to an administrator, the employees of a company and the leaders of the company; the administrator, the employees of the company and the leaders of the company manage elevator installation and maintenance business through the elevator maintenance management component module; according to the elevator installation and maintenance management system, a whole management process becomes systematic, transparent, simple and examinable through advanced scientific management means, and the elevator installation and maintenance management system has the advantages that the efficiency is high, the cost is low, the information storage is sound and safe, a document approving process is simple, the information sharing and communication are smooth, and the departments or the leaders of the company can monitor and manage a whole business process conveniently.

The invention relates to a VDMOS (Vertical Double-diffusing Metal-Oxide-Semiconductor) transistor testing structure which belongs to the technical field of semiconductors and comprises a semiconductor substrate, an epitaxial layer, a first source doping region, a second source doping region, a channel region and an interlevel dielectric layer, a metal layer covering the upper surface of the semiconductor substrate and used for leading out two source electrodes and grid electrodes and a back metal layer covering the bottom surface of the semiconductor substrate, wherein the channel region positioned below the source doping region is mutually separated to form double channels, and the source electrode positioned on the surface of the epitaxial layer is mutually cut off to be respectively used as a test source electrode and a test drain electrode. Under the control of the voltage of the grid electrode, the test is carried out by using the test source electrode and the test drain electrode as output electrodes, the invention effectively realizes that the on resistance of the VDMOS transistor is tested, overcomes the difficulty of superficial characteristics after grinding and unifies the test program, thereby further lowering the maintenance and development cost, and improving the product test and feedback efficiency.

The invention discloses a mobile communication system, network equipment, terminal equipment and a data scheduling method, and the method comprises the following steps: searching a PDCCH set which comprises at least two repeated PDCCHs and is used for scheduling one target PDSCH set; wherein the value of the DAI field of each PDCCH in the PDCCH set is determined according to the position sequenceof the DAI field in the PDCCH set; wherein the position sequencing is that at least one numerical value of a monitoring moment, a serving cell index, a bandwidth part index, a CORESET index, a searchspace index and a CCE index is arranged from small to large according to an identifier of a transmission resource occupied by each PDCCH in the PDCCH set; determining the number of bits of the HARQ-ACK codebook and each piece of HARQ-ACK information according to the searched DAI field of the PDCCH; and sending the HARQ-ACK codebook. The invention further comprises a mobile communication network device, a terminal device and a system which apply the method. By using the dynamic HARQ-ACK codebook determined by the sorting mode of the DAI in the downlink control channel in the invention, the timedelay requirement and the efficiency requirement of uplink control information transmission in an NR system are met.