64results about How to "Improve downlink throughput" patented technology

A system and machine-implemented method are described for performing precoding interpolation in a DIDO system which employs orthogonal frequency-division multiplexing (OFDM) and DIDO precoding to communicate with a plurality of distributed-input-distributed-output (DIDO) clients. For example, a system according to one embodiment of the invention comprises: selecting a first subset of ODFM tones to determine a first subset of precoding weights; deriving a second subset of precoding weights for a second subset of ODFM tones by interpolating between the first subset of precoding weights; and using a combination of the first subset of precoding weights and the second subset of precoding weights to precode a data stream prior to transmitting the data stream to a DIDO client.

A system and method are described herein employing a plurality of distributed transmitting antennas to create locations in space with zero RF energy. In one embodiment, when M transmit antennas are employed, it is possible to create up to (M−1) points of zero RF energy in predefined locations. In one embodiment of the invention, the points of zero RF energy are wireless devices and the transmit antennas are aware of the channel state information (CSI) between the transmitters and the receivers. In one embodiment, the CSI is computed at the receivers and fed back to the transmitters. In another embodiment, the CSI is computed at the transmitter via training from the receivers, assuming channel reciprocity is exploited. The transmitters may utilize the CSI to determine the interfering signals to be simultaneously transmitted. In one embodiment, block diagonalization (BD) precoding is employed at the transmit antennas to generate points of zero RF energy.

Systems and methods are described for coordinating transmissions in distributed wireless systems via user clustering. For example, a method according to one embodiment of the invention comprises: measuring link quality between a target user and a plurality of distributed-input distributed-output (DIDO) distributed antennas of base transceiver stations (BTSs); using the link quality measurements to define a user cluster; measuring channel state information (CSI) between each user and each DIDO antenna within a defined user cluster; and precoding data transmissions between each DIDO antenna and each user within the user cluster based on the measured CSI.

The invention provides a downlink self-adaptive method; wherein, a resource block group (RBG) corresponding to a sub-band channel quality indicator (CQI) of good quality is used for sending data scheduled to UE. When the RBG corresponding to the sub-band CQI does not meet the requirement of data amount, the RBGs corresponding to the sub-band CQI and a part of broad band CQI are jointly used for sending the data scheduled to the UE; however, when both the RBG corresponding to the sub-bond CQI and the RBG corresponding to the broad band CQI do not meet the requirement of the data amount, the sub-band CQI and all RBGs corresponding to the broad band CQI are used for sending a part of the data scheduled to the UE. Furthermore, when the TBz can be sent by the RBG corresponding to the sub-bond CQI is less than the TBz can be sent by the RBG corresponding to the broad band CQI, the RBG corresponding to the sub-bond CQI is used for sending the data scheduled to the UE. Under the feedback of UE selective sub-band CQI, the method of the invention not only adopts a single code modulation mode for each data stream, but also obtains comparatively high downlink throughput rate.

Communication signal equalization methods and systems are disclosed. A CDMA signal having a data portion and a known portion including a known or repeated data sequence and received over a multipath communication channel represents a linear convolution between the multipath channel and a transmitted CDMA signal. A channel estimate of the communication channel is determined from the known portion, and the CDMA signal is translated into a new CDMA signal which is a cyclic convolution with the channel estimate. A frequency domain representation of the new CDMA signal is adjusted using the channel estimate to produce a frequency domain representation of an equalized signal.

The invention discloses an adaptive adjustment system and an adaptive adjustment method of the length and speeds of an AP (access point) downlink aggregation frame, and mainly aims at solving the problem that speeds and the length of a transmit frame can not adapt to channel change due to frequent change of channel quality between an AP and a website in a wireless network. The adaptive adjustment method of the length and the speeds of the AP downlink aggregation frame includes the implementation steps that 1) the AP calculates transmission speed and error sub-frame rates of a current aggregation frame and estimates effective handling capacity so as to forecast channel quality; 2) the AP forecasts a variation tendency of a channel according to values of the error sub-frame rates of a front segment and a back segment of a bit code table; 3) the AP adaptively adjusts the length and the speeds of the aggregation frame, and selects MIMO (multiple input multiple output) work modes of a physical layer according to a BACK signal to noise ratio; 4) the AP analyzes the maximum continuous number of 0 in the bit code table, judges whether collision occurs in current transmission, and adaptively starts an RTS / CTS mechanism to avoid the collision. The adaptive adjustment system and the adaptive adjustment method of the length and the speeds of the AP downlink aggregation frame have the advantages of being rapid in response for the channel change and good in adaptation, and can be used in the wireless network in which the channel quality frequently changes.

A method for supporting coexistence in a mobile station is provided. The method for supporting coexistence in the mobile station includes, at the mobile station, turning on Bluetooth at a start point of a WiMAX downlink subframe, stopping the operation of the Bluetooth if WiMAX channel quality of the mobile station becomes less than a threshold value during the operation of the Bluetooth, and, at the mobile station, turning off the operation of the Bluetooth at the start point of a WiMAX uplink subframe. Accordingly, it is possible to solve fragmentation by minimizing the interruption of the WiMAX transmission / reception and to improve WiMAX downlink throughput by restricting Bluetooth data transmission / reception according to the WiMAX channel quality.

The invention relates to a method for generating ACK / NACK information, which comprises the following steps that: the number of downlink resources for sending data to user equipment by a base station is N', N' pieces of ACK / NACK information exist aiming at the N' downlink resources, the number of ACK / NACK bits sent in an uplink subframe is M, and when N' is more than or equal to M, the N' downlinkresources after sending the data are divided into M groups, and each group of the downlink resources outputs one piece of ACK / NACK or DTX information in a binding mode; and the user equipment sends the ACK / NACK or DTX information in the uplink subframe. The method fully uses the capability of sending multi-bit ACK / NACK in the uplink direction, and can improve the downlink throughput.

The present invention relates to a transmission-band allotting apparatus for suitably allotting a band used for transmitting a packet to each terminal in a packet radio transmission system. An object of the present invention is to provide a fair service to individual terminals, and to improve the throughput of downlink. Therefore, the transmission-band allotting apparatus according to the present invention is constructed by preferentially allotting the band of the downlink to terminals in a descending order of ratios of a deviation from an average value of transmission qualities notified by the terminal and a dispersion of each of the transmission qualities.

An embodiment of the invention discloses a data transmission method, an apparatus and a system thereof and relates to the communication field. In order to make a flexible subframe achieve flexible configuration and increase a downlink throughput, a technical scheme provided in the invention has the following steps: configuring a hybrid automatic repeat request (HARQ) synchronization attribute of a data packet, wherein the HARQ synchronization attribute comprises a synchronous HARQ or an asynchronous HARQ; when the HARQ synchronization attribute of the data packet is configured to be the asynchronous HARQ, configuring a HARQ process number of the data packet; sending downlink control information which is used to schedule the data packet to user equipment.

A first problem is to reduce an enormous uplink throughput of a base station that feedback information needs so as to improve an uplink throughput of useful user data. A second problem is to carry out a frequency segment assignment to guarantee a number of communication times and a communication quality to every terminal apparatus so as to increase a downlink throughput. The second problem is solved together. As means to give the number of communication times per each terminal apparatus, means to estimate an expected value of the number of communication times per each terminal apparatus, and means to assign the terminal apparatus per each frequency segment are arranged in the base station apparatus. To increase the communication quality, necessary means in each terminal apparatus are: means to measure statistics values of a communication capacity with regard to all the frequency segments; means to feed back the statistics values to the base station apparatus; means to calculate the occurrence probability of a high communication capacity based on the communication capacity statistics values per each frequency segment of all the terminal apparatuses; and means to assign the terminal apparatus per each frequency segment. To fuse the means to give the number of communication times and the means to give the communication quality, the means to assign the terminal apparatus per each frequency segment that the base station apparatus has assigns a frequency segment that has a little number of competitors sharing a same segment, and has high average and dispersion of the communication capacity to each terminal apparatus.

The invention discloses a message transmission method. The method comprises the following steps that a sending terminal retransmits a first message after determining that the first message is lost andreduces a congestion window and / or a slow start threshold; a receiving terminal sends an ACK aiming at the retransmitted first message to the sending terminal after firstly receiving the retransmitted first message, the ACK contains an active constructed DSACK option, the DSACK option is sent to the sending terminal so as to prompt the sending terminal that the first message is repeatedly received; and the sending terminal deduces that the first message is disordered and packet loss because of congestion is not generated according to a serial number recorded in the DSACK option, and because retransmission triggered by first message packet loss and congestion window retreat are unnecessary, the congestion window and / or the slow start threshold are compensated.

The embodiment of the invention discloses a data transmission method, device and system, relating to the field of communication. To increase the downlink throughput, the technical scheme provided by the invention is as follows: the HARQ synchronous attribute of a data packet is configured; the HARQ synchronous attribute includes a synchronous HARQ or an asynchronous HARQ; the data packet is a transmission packet born by an uplink shared channel; high signalling is sent to user equipment; the high signalling includes the HARQ synchronous attribute of the data packet; the high signalling is radio resource control RRC signalling or media access control MAC signalling; when the HARQ synchronous attribute of the data packet is configured to the asynchronous HARQ, the HARQ process number of the data packet is configured; downlink control information for dispatching the data packet is sent to the user equipment; and the downlink control information is also used for indicating the HARQ process number.

The invention provides a method for transmitting mixed automatic retransmission request feedback information. User equipment (UE) obtains grouping information of a cell carrier (CC) from a downlink assigning instruction (DAI) domain of a physical downlink control channel (PDCCH) of each downlink sub frame, in addition, each CC of the corresponding downlink sub frame is grouped according to the grouping information of the CC, ACK / NACK information corresponding to the downlink data transmission of the CC in each group in each downlink sub frame is bound, the bound ACK / NACK information respectively corresponding to each CC group of each downlink sub frame is obtained, and the ACK / NACK information is sent on the uplink sub frame corresponding to each downlink sub frame. The method has the advantages that the UE feeds back possibly more effective ACK / NACK information, and the redundancy retransmission is reduced, so the downlink throughput is improved.

An embodiment of the invention provides an uplink feedback method of a high speed dedicated physical control channel (HS-DPCCH), a terminal and a base station thereof. The method comprises the following steps: receiving uplink feedback triggering information; carrying out uplink sending according to the uplink feedback triggering information, wherein the uplink sending comprises that uplink HS-DPCCH feedback is performed according to a received uplink feedback resource. In the embodiment of the invention, the feedback of UE for downlink HS-DSCH (high speed downlink shared channel) data is realized and then a base station can determine whether to retransmit the sent data according to the feedback. A blind retransmission mode in the prior art is avoided. By using the method of the invention, a utilization rate of a downlink HS-DSCH resource is increased and a downlink throughput is increased too.

The invention discloses a method for confirming a shaped beam GOB vector of an auxiliary carrier wave. The method for confirming the shaped beam GOB vector of the auxiliary carrier wave is used in a CA system. The method for confirming the shaped beam GOB vector of the auxiliary carrier wave includes: judging whether a first intersection angle is equal to a second intersection angle, wherein the first intersection angle is an intersection angle between a user terminal and the antenna normal direction of a main carrier wave, and the second intersection angle is an intersection angle between the user terminal and the antenna normal direction of the auxiliary carrier wave; if the first intersection angle is not equal to the second intersection angle, judging whether an angle difference between the first intersection angle and the second intersection angle always is a fixed value; if the angle difference between the first intersection angle and the second intersection angle always is the fixed value, confirming the GOB vector according to the fixed value and an AOA value of the user terminal in the wave incoming direction of the user terminal; if the angle difference between the first intersection angle and the second intersection angle is not the fixed value always, confirming the GOB vector according to a direction of arrival DOA of the user terminal on the auxiliary carrier wave. The method for confirming the shaped beam GOB vector of the auxiliary carrier wave can achieve the purpose of confirming technical effects of the GOB vector of the auxiliary carrier wave when the CA system where the main carrier wave and the auxiliary carrier wave are located is not in a frequency segment.

The invention provides a wireless channel competition method and system. The wireless channel competition method and system are applied to a wireless network which comprises wireless access point devices (APs) and at least two wireless client side devices (CPE). The method includes the steps that the size of a local minimum competition window is calculated and configured according to the ratio of the average speed of a cache region to the preset reference speed and the size of a local standard competition widow, the number of items is set as zero, and meanwhile the content of the cache region is cleared; when the sending speed of data between the CPE and the APs changes, the CPE can adjust the size of the minimum competition window according to the current average sending speed, zooms out the minimum competition window when the average sending speed increases, or else zooms up the minimum competition window. Consequently, the channel competition chance of the CPE is increased or decreased, the whole throught of the APs is increased, and user experience is improved.

The invention discloses a cellular downlink throughput optimization method based on an out of band D2D multi-hop relay. The method comprises the following steps: a base station determines the mode of each UE obtaining a cellular channel to receive data from the base station in three phases: preselecting a first relay, preselecting a second relay and verifying the link throughput of the preselected relays, wherein the mode comprises directly receiving data from the base station, receiving the data by selecting a relay to transfer the data and receiving the data by selecting two relays to transfer the data; in the phase of preselecting the first relay, the first relay is selected by comprehensively considering the improvement of the throughput and the residual energy level of the relay; in the phase of preselecting the second relay, the second relay is selected by setting an energy constraint threshold to ensure that the residual energy level of the second relay is not less than a corresponding value of the first relay; and in the phase of verifying the link throughput of the preselected relays, whether the preselected relay is abandoned or retained is determined according to whether the throughput is improved. By adoption of the cellular downlink throughput optimization method disclosed by the invention, the data receiving quality can be effectively improved, the throughput is effectively improved, the service life of the network is prolonged, and the computation and communication costs are reduced.

The present invention discloses a terminal capability reporting method and device. The method comprises the following steps of: receiving a first signaling message which is transmitted by a terminal and contains a specified field used for identifying terminal types; determining the terminal type to which the terminal belongs according to a protocol version supported by a communication network and the specified field in the first signaling message; and determining the terminal capability of the terminal in set corresponding relationships of terminal types and terminal capabilities according to the determined terminal type. With the terminal capability reporting method and device adopted, the terminal can support a capability for receiving 256QAM signals, and terminals having capabilities for receiving 256QAM signals can work normally when entering communication networks of lower versions.

A Base Station (BS) antenna in a mobile communication system is provided, in which a reflective plate has a frontal surface onto which radiation elements are attached, and at least one protector is attached onto the reflective plate, surrounding at least part of the reflective plate.

The invention provides a dynamic scheduling method of code resources, comprising the steps: (1) an RNC (radio network controller) distributes public channel code resources to cells of a NodeB in advance; (2) the NodeB acquires the occupying condition of the downlink code channels of the current cells and carries out sorting on usable spreading factor (SF)16 code channels; and (3) the NodeB carries out code channel updating according to the usable SF 16 code channels and marks the code channels for user scheduling of high-speed downlink packet access (HSDPA). The invention also provides a dynamic scheduling system and base station of the code resources. In the method, the base station and the system, the problems and the defects that in the prior art, the adjustment period of the RNC to the number of HS-PDSCH (high-speed physical downlink shared channel) code channels of the cells of the NodeB is longer and the downlink code channel resources are wasted can be overcome, downlink code channel resources are fully and reasonably utilized, the utilization ratio of the downlink code channel resources and the downlink throughput of HSDPA cells are improved, and the overall performance of a network is improved.

The invention discloses a reuse method of associated dedicated physical channels. The reuse method comprises the following steps: a reuse mode the associated dedicated physical channels is selected; states of various associated dedicated physical channels are determined according to the number of reuse users of various associated dedicated physical channels; and the associated dedicated physical channel at the reuse mode or idle mode is selected and distributed to at least one user for use. The reuse method can effectively improve the utilization rate of code resources and improve the capacity and the downlink throughput of a system.

The invention provides a high speed downlink packet access (HSDPA) scheduling method and a scheduler which employ a multi-user multiple-input-multiple-output (MU MIMO) technology. HSDPA UE can perform a multiplexing scheduling on any downlink resources except a HS-PDSCH resource based on a MU MIMO mode, which can effectively raise a downlink throughput and a downlink peak value rate of HSDPA. And a default training sequence offset distribution mode is supported. Therefore, UE which do not support the special default training sequence offset distribution mode can multiplex other UE resources.

A Multi-Input Multi-Output (MIMO) downlink transmission control method that is related to communications technologies is disclosed in embodiments of the present invention. The method includes: obtaining a channel fading change rate and a feedback delay of a user; calculating out a closed-loop MIMO throughput gain according to the channel fading change rate and the feedback delay; and determining a downlink transmission mode according to the closed-loop MIMO throughput gain, wherein the downlink transmission mode includes a closed-loop mode or an open-loop mode. A MIMO downlink transmission control apparatus is also disclosed.

The invention provides a data transmission method and device, and aims to solve the problem of resource waste. According to the invention, the RLC entity determines the resource margin according to the scheduled available resources and the actual data size to be sent; key data, for example, an RLC control PDU included in an RLC PDU to be sent and / or an RLC data PDU bearing a data message with a specific service feature are / is included in the RLC PDU to be sent. That is to say, the key data is sent in the Pading, the resource margin is fully utilized, the reliability of uplink data transmissionis improved, and extra wireless resources do not need to be consumed at the same time.

The invention discloses a method for determining a downlink frequency selection scheduling resource and a device, which aim at selecting a physical resource block corresponding to a subband with maximal subband channel quality indicator (CQI) value or with highest multi-channel server (MCS) grade value of the subband CQI information when the downlink frequency selection scheduling resource is determined, so a good channel condition can be guaranteed, and the downlink throughput can be improved. The method comprises the steps that: the present subband channel quality indicator (CQI) information reported by a user terminal is received by a basic station, a burst packet (BP) corresponding to the subband is determined according to the present subband CQI information, and the CQI value of the BP corresponding to the subband is updated; other subbands being attributive to the same broadband frequency band with the subband are determined, and the subband CQI value corresponding to other subbands is reduced; and a subband with the highest CQI value is determined from the subbands of the BP, and a resource block group (RBG) corresponding to the determined subband is determined as the downlink frequency selection scheduling resource corresponding to the BP.

The present disclosure provides a method for reporting channel state information (CSI). a first set of channel state information-reference signals (CSI-RSs) sent from a base station is measured to obtain a first set of CSI, and the first set of CSI obtained is reported to the base station. A second set of CSI-RSs sent from the base station is measured based on the first set of CSI to obtain a second set of CSI, and the second set of CSI obtained is reported to the base station, in which the second set of CSI-RSs is precoded CSI-RSs determined based on the first set of CSI.

The invention discloses an improved 5G dynamic TDD (Time Division Duplex) network cell clustering interference coordination scheme to realize interference suppression on cross time slot interference generated by adopting a dynamic TDD mode in a 5G ultra-dense network. According to the method, dynamic clustering is carried out by taking interference between user equipment and interference between base station equipment in the 5G ultra-dense network into consideration at the same time, and a low-complexity clustering mode is adopted, so that low-power nodes in the ultra-dense network can be dynamically clustered at a relatively small time scale. Compared with a cell using a traditional cell clustering method for interference coordination, the improved 5G dynamic TDD network cell clustering interference coordination scheme not only can improve the uplink throughput of the system, but also can improve the downlink throughput of the system, and obtains ideal performance in a 5G ultra-dense network.

The invention provides a resource optimization method and device which comprises the steps of: obtaining a modulation coding system (MCS) and a multi-input and multi-output (MIMO) type of a region where a user is in, comparing thresholds corresponding to the MCS and the MIMO type of the region where the user is in, and determining a target region of the user according to a comparing result, wherein the region is an inner ring or outer ring. The invention also provides a resource optimizing device. According to the invention, resource utilization rate can be increased, and downlink throughput capacity of a base station is increased.