42results about How to "Improve uplink performance" patented technology

A method and apparatus for changing a Transmit Time Interval (TTI) based on a Hybrid Automatic Repeat Request (HARQ) process in a code division multiple access (CDMA) communication system that supports a packet data service through an Enhanced Uplink Dedicated transport Channel (E-DCH). According to the method and apparatus, a data transmission/reception is performed in a manner that a TTI change signal is received, the actual time point of TTI change is calculated based on the TTI change signal and the HARQ process of the previous TTI, and the TTI is changed at the calculated time point of TTI change.

A data transmission method and an apparatus to communicate data on multiple carriers in the mobile communication system are provided. A random access method of a terminal in a mobile communication system including primary and secondary cells operating on multiple carriers according to the present invention includes communicating data after random access in the primary cell, receiving, when the random access is triggered in the secondary cell, information for use in the secondary cell random access from the primary cell, transmitting a preamble in the secondary cell based on the received information, monitoring the primary cell to receive a Random Access Response for the secondary cell, and applying, when the Random Access Response for the secondary cell is received, the information carried in the Random Access Response to the secondary cell in which the preamble has been transmitted.

The present invention is directed to improvements for distributed antenna systems and more particularly to methods and systems for improving uplink communications. In one embodiment, Aggregation Point Noise Blocking provides for blocking or filtering the noise contributed by one or more of the branches coupled to an aggregation point that are not carrying the signal from a particular terminal. Signal activity from a given terminal on a particular branch can be identified and that information can be used to selectively block or filter the signal noise contributed by the other branches to an aggregation point. The selective blocking or filtering can also include an attenuation function to attenuate the signal and provide dynamic range smoothing. In another embodiment the signal can be regenerated to produce a signal that has a restored or very high SNR. An uplink regeneration block can be provided which demodulates the uplink signal to recover the transmitted information and then re-modulates the transmitted information to regenerate a signal at a restored or very high SNR.

Method and system for scheduling of a base station for HSUPA is provided. The method for scheduling of base station includes a method for scheduling of serving base station and a method for scheduling of non-serving base station, in which the method for scheduling of the serving base station comprises the base station generating a scheduling grant based on scheduling information SI and a happy bit transmitted from a terminal and based on a currently measured interference value, a configured threshold and associated resource information. The method for scheduling of the non serving base station comprises the base station generating a scheduling grant based on a currently measured interference value, a configured threshold and associated resource information. The system for scheduling of a base station comprises a transmitting module is used by the terminal for transmitting information to the base station; a configuration module is used by the SRNC for configuring parameters of associated threshold to the base station; a measurement module is used by the base station for measuring current interference; a calculation module is used by the base station for performing scheduling based on the current-obtained information. The present invention has solved the problem in scheduling of the base station for resources among terminals, which achieves the object of enhancing performance of uplink in a system and improving experience for users and has an important effect on HSUPA normalization process.

Disclosed is a method for transmitting an uplink signal by a mobile station in a mobile communication system using an OFDMA scheme. The method includes estimating a downlink channel status by using a signal received from a base station; determining a precoding matrix by using the estimated downlink channel status; and transmitting a signal obtained by multiplying an uplink signal to be transmitted by the precoding matrix to the base station.

The invention relates to a data transmission method and system, computer equipment and a storage medium. The host unit completes intelligent selection of the to-be-transmitted far-end unit group of the UE according to the signal transmission quality data of the plurality of service far-end unit groups corresponding to the UE and the current load condition of the cell, processes the uplink data signal target extension unit of the selected to-be-transmitted far-end unit group, and returns the uplink data signal to the host unit. According to the method, the host unit realizes intelligent selection of the uplink service remote unit group of the UE, and different remote unit groups to be transmitted are determined under different cell loads, so that an edge user can upload maximum data according to the actual resource capacity, and the uplink performance of the edge user covered by the remote unit group in an overlapping manner is greatly improved.

The invention discloses an upstream resource distribution method capable of considering both throughput capacity and fairness in a TD-LTE-Advanced relay system, belongs to the technical field of relay in a wireless communication system, and aims to provides a reasonable upstream resource distribution algorithm to solve the problems that the existing resource distribution algorithm in the relay system is high in expense and does not consider both fairness and throughput capacity. The upstream resource distribution method comprises the following steps: a base station dynamically distributes the frequency resource for relay users and direct transmitting users according to service quantity demanded of the direct transmitting users and the relay users; the relay in the uplink subframe accessing to the link adopts the dynamic resource distribution method to invoke the relay users; the base station in the direct transmitting link adopts the dynamic resource distribution method to invoke the direct transmitting users; the base station in the uplink subframe of the return link distributes the resource for the relay users based on the queue information of the relay users cached in the relay, and meanwhile the base station invokes the direct transmitting users by the dynamic resource distribution method. The upstream resource distribution method disclosed by the invention can promote the performance of the relay users better, and can meet the fairness for the users.

A transmitter comprises functionality (101, 103) for generating a block of input modulation symbols for example from received data bits. An M-point discrete Fourier transform (105) is applied to the block of input modulation symbols resulting in a frequency domain symbol block. This block is fed to an N-point inverse discrete Fourier transform (105) (N>M) thereby generating a time domain transmit signal. In addition, the transmitter (200) comprises an inter-symbol processor (201) which determines inter-symbol values corresponding to inter-symbol times of the time domain transmit signal and an attenuation processor (203) which attenuates at least one of the input modulation symbols in response to the inter-symbol values. By attenuating selected input modulation symbol(s) a significantly reduced amplitude variation and specifically peak-to-average amplitude variation can be achieved.

According to some embodiments, a method for use in a user equipment (UE) of managing a listen-before-talk (LBT) contention window size comprises performing a first LBT procedure using a first contention window size and priority class for a first uplink transmission in unlicensed spectrum. The first uplink transmission comprises an acknowledged transmission. The method further comprises transmitting a second uplink transmission. The second uplink transmission comprises an un-acknowledged transmission. The method further comprises receiving an acknowledgement for the first uplink transmission, and modifying both the first contention window size and a second contention window based on the received acknowledgement. The method further comprises performing a second LBT procedure using the second contention window size and a second priority class for a third uplink transmission in unlicensed spectrum. The third uplink transmission comprises an un-acknowledged transmission.

The invention discloses a control method of an access cell and an apparatus thereof, and a multi-card multithread terminal. The method comprises the following steps of receiving a network quality parameter of each cell reported by each LTE module, wherein each cell includes a service cell and an adjacent cell; according to the network quality parameter, calculating a throughput and a throughput gain of the LTE module accessing each cell respectively; according to the service cell and the adjacent cell, determining different access cell combinations which can be realized by the plurality of LTE modules, and according to the throughput and the throughput gain of the LTE module accessing each cell, calculating predicted total throughput values of the plurality of LTE modules under the different access cell combinations respectively; and selecting the access cell combination corresponding to a maximum value in the predicted total throughput values to be a decision strategy of the access cell. In the invention, through selecting the access cell combination with the maximal predicted total throughput value to be the decision strategy of the access cell, the access cell of each LTE module can be automatically adjusted according to an actual network condition and uplink performance of the multi-card multithread terminal is increased.

The invention provides a multi-user detection method and a device thereof in wireless network. Specifically, the adopted technical scheme of the invention is as follows: jointly detecting and processing an original signal on the basis of a first estimated value of user signals from each user in a receiving device; de-multiplexing a second estimated value obtained from the joint detection; multiplexing the second estimated value obtained from the de-multiplexing; and repeating the operation until the iteration is convergent or reaches set times. The invention accumulates precision estimated by Gauss during many times of iteration, thus providing a multi-user detection scheme superior to prior art and optimizing uplink performance.

The embodiment of the invention provides a method and device for improving uplink performance and a user terminal, and relates to the technical field of communication. The method comprises the following steps: acquiring first transmitting power corresponding to one or more first radio frequency signals to be transmitted; when the first transmitting power is greater than a current transmitting power threshold value of a first antenna to which the first radio frequency signal currently belongs and when at least one antenna, except the first antenna, in the at least two antennas has at least oneantenna of which the current transmitting power threshold value is greater than the current transmitting power threshold value of the first antenna, determining a first target antenna of which the first current transmitting power threshold is closest to the first transmitting power forward direction from at least one antenna of which the current transmitting power threshold is greater than the current transmitting power threshold of the first antenna; determining first target transmitting power according to the first transmitting power and a first current transmitting power threshold; transmitting one or more first radio frequency signals to be transmitted through the first target antenna according to the first target transmitting power. The uplink performance of the user terminal is improved.

A method and apparatus for load balancing are provided in an embodiment of that present invention, wherein the method is applied to a carrier aggregation CA cell. The CA cell comprises a local cell and a neighboring area of the local cell. The CA cell comprises: determining the first resource information of the local cell according to a preset period, and judging whether the local cell needs loadbalancing according to the first resource information, wherein, the first resource information is used to characterize the utilization degree of the current CA feedback resource of the local cell; ifit is determined that the cell needs load balancing, determining the second resource information of each neighboring area, wherein the second resource information is used for characterizing the utilization degree of the current CA feedback resource of the neighboring area; determining a target neighboring area according to the first resource information and the second resource information; determining a target user from all CA users in the cell, and switching the target user to a target neighboring area; so as to reduce the occupancy of the uplink control resources of the cell and improve theuplink performance of the cell.

The invention discloses a corrosion-resisting high-efficiency electro-filtration acid mist removing device comprising a housing, a precipitation pole, an insulator, fixing plates, a conductive tube, a heavy hammer, gas distribution plates, a water distribution plate, a blower, and an insulator box. The precipitation pole is fixed in the housing through an upper fixing plate and a lower fixing plate. The sealed water distribution plate is arranged above the precipitation pole. The conductive tube is vertically inserted in the precipitation pole. The heavy hammer is connected to the lower end of the conductive tube. The gas distribution plates are divided into three layers and are arranged below the precipitation pole in the housing. The blower and the insulator box are arranged on the top of the housing. The insulator is arranged in the insulator box. The corrosion-resisting high-efficiency electro-filtration acid mist removing device provided by the invention has good mixed acid corrosion resistance, high-temperature resistance, good conductivity, good acid removing and dust removing effects, and long service life.

The invention discloses an uplink carrier selection method and device, a terminal and a storage medium, and the method comprises the steps: a first terminal selects to access an SUL carrier or an UL carrier based on a first threshold when the first terminal is in an idle state; the first threshold is determined based on at least one of 5QI and slice identification corresponding to the service type of the first terminal; when the first terminal is in a connected state and in an NR uplink time slot, selecting to switch to an SUL carrier or an UL carrier in a first cell accessed by the first terminal based on the first measurement result, the second measurement result and the first information; wherein the first measurement result represents a measurement result of the SUL carrier of the first cell; the second measurement result represents a measurement result of the UL carrier of the first cell; the first information represents at least one of a first load corresponding to an SUL carrier of the first cell or a second load corresponding to an UL carrier of the first cell.