| Patent application number | Description | Published |
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| 20130058425 | PRECODING PROCESSING METHOD AND USER EQUIPMENT - A precoding processing method and user equipment are disclosed. The precoding processing method includes: selecting a codebook vector for performing precoding processing for data among a codebook set of N | 03-07-2013 |
| 20130058428 | METHOD AND APPARATUS FOR TRANSMITTING PRECODING MARTRIX INDEX AND PERFORMING PRECODING - A method and an apparatus for sending a Precoding Matrix Index (PMI) and performing precoding are provided in the embodiments of the present invention. The method for sending the PMI comprises the following steps: a user equipment acquires the transmission channel capability of carrying the PMI; according to the transmission channel capability of carrying the PMI, the precoding matrices are selected from a locally-stored first codebook set to form a second codebook set; a first precoding matrix is selected from the second codebook set; an index corresponding to the first precoding matrix is sent to a base station over the transmission channel so as to make the base station can find out the first precoding matrix according to the index and precode the data according to the first precoding matrix. The embodiments of the present invention can realize the flexible configuration and use of the PMI. | 03-07-2013 |
| 20130064207 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING PRECODING INFORMATION - A method and an apparatus for transmitting and receiving precoding information are disclosed. The method can be implemented in a communication system, wherein the communication system includes a terminal and a data transmitting apparatus in communication with the terminal, a system bandwidth of the communication system is divided into at least one bandwidth part (BP) and each BP comprises at least one subband. The method includes: selecting, by the terminal, a subband within a first BP of the at least one BP according to a preset criterion or a predefined rule; obtaining, by the terminal, precoding information of the subband selected within the first BP; and transmitting, by the terminal, the precoding information of the subband selected within the first BP to the data transmitting apparatus. | 03-14-2013 |
| 20130077709 | Method and Device of Sending and Receiving Precoding Information - The present invention discloses a method and a device of sending and receiving precoding information. A terminal terminal obtains a wideband precoding matrix indicator PMI. The terminal encodes an MSB of the wideband PMI to obtain encoded information. The MSB of the wideband PMI is encoded separately or jointly with other information and the MSB is a part of the wideband PMI. The terminal sends encoded information to a data sending end. | 03-28-2013 |
| 20130142150 | METHOD, BASE STATION AND USER EQUIPMENT FOR TRANSMITTING PHYSICAL RESOURCE BLOCKS AND ESTIMATING CHANNELS - A method, a base station and a user equipment for transmitting physical resource blocks and estimating channels are provided. The method includes: scheduling, by a base station, M PRBs for the user equipment, and configuring reference signal patterns for the M PRBs as following: allocating (X−1)M+1 demodulation reference signal subcarriers for M PRBs in a frequency domain, configuring only one demodulation reference signal subcarrier within a range of (−N, N] subcarriers in a border of every two PRBs, where locations of the rest (X−2)M+2 demodulation reference signal subcarriers keep consistent with locations of demodulation reference signal subcarriers in M contiguous first demodulation reference signal patterns in a frequency domain; and transmitting the configured M PRBs to the user equipment, so that the user equipment performs joint channel estimation according to the configured M PRBs. This saves reference signal overheads and optimizes data transmission rate. | 06-06-2013 |
| 20130315329 | METHOD AND DEVICE FOR DETERMINING CODEBOOK GENERATION MODE - A method for determining codebook generation mode is disclosed by the present disclosure, comprising: A: grouping M kinds of ranks among N kinds of ranks supported by a user equipment (UE) into Z sets of rank, and for each set, respectively selecting a codebook generation mode from at least two preset codebook generation modes, where N, M and Z are integers greater than or equal to 1, M is less than or equal to N, and Z is less than or equal to M; B: informing the UE or a serving cell thereof of the selection. The present disclosure also discloses a UE and a base station. The system performance can be improved by adopting the method and devices of the present disclosure. | 11-28-2013 |
| 20130316719 | METHOD OF PROCESSING REFERENCE SIGNAL CONFIGURATION INFORMATION IN WIRELESS COMMUNICATION SYSTEM, BASE STATION AND TERMINAL - The present invention provides a method of processing reference signal configuration information, a base station and a terminal. The method includes: sending, by a base station, first reference signal configuration information and at least one piece of second reference signal configuration information to a terminal, such that the terminal performs detection of downlink channel state information according to the first reference signal configuration information and the at least one piece of second reference signal configuration information, wherein the first reference signal configuration information includes configuration information of a reference signal sent by antenna port(s) identified by a first number of ports, and the second reference signal configuration information includes configuration information of a reference signal sent by at least one antenna port of other antenna ports than the antenna port(s) identified by the first number of ports among the antenna ports configured by the base station. | 11-28-2013 |
| 20140133340 | METHOD AND APPARATUS FOR OBTAINING CHANNEL STATE INFORMATION - This invention discloses method and apparatus for obtaining channel state information, and relates to the field of communication techniques, capable of reducing signaling and feedback overheads and lowering UE operation complexity. According to the solutions provided in embodiments of this invention, a RS predetermined transmission time and a RS predetermined frequency are transmitted to a UE by any one cell of at least two cells; each cell or cell group out of the at least two cells, according to the RS predetermined transmission time and the RS predetermined frequency, transmits a RS to the UE on different RS resources; the measurement result transmitted by the UE is received, which comprises CSI between any one cell or cell group out of at least two cells and the UE. The solutions provided in embodiments of this invention are applicable when it is required to obtain CSI between multiple cells and a UE. | 05-15-2014 |
| 20140133601 | METHOD, APPARATUS AND SYSTEM FOR MULTI-ANTENNA TRANSMISSION - Embodiments of the present invention provide a method, an apparatus and a system for multi-antenna transmission, wherein a third precoding matrix determined by a sending end device is a function of a first precoding matrix and a second precoding matrix. That the first precoding matrix has a block diagonal structure and that sub-matrices corresponding to two blocks are Hermitian matrices enable the above-mentioned third precoding matrix to match with a transmit spatial autocorrelation matrix of a cross-polarized antenna or a distributed antenna, thereby enhancing precoding performance and improving system throughput effectively. | 05-15-2014 |
| 20150055503 | METHOD FOR PROCESSING REFERENCE SIGNAL, USER EQUIPMENT, AND BASE STATION - The present invention provides a method for processing a reference signal, a user equipment, and a base station. The method includes: obtaining, by a UE, a first reference signal resource set, where the first signal resource set includes at least one first reference signal resource; and executing, by the UE, an operation of performing a co-location assumption process for at least one antenna port indicated by each first reference signal resource. | 02-26-2015 |
| 20150085692 | METHOD, USER EQUIPMENT, BASE STATION AND SYSTEM FOR MEASURING SIGNAL RECEIVED POWER - Embodiments of the present invention disclose a method, a user equipment, a base station and a system for measuring signal received power, wherein the method includes: obtaining, by a user equipment (UE), reference signal resource; obtaining, by the user equipment (UE), a reference signal subset and a precoding matrix, wherein the reference signal subset is a subset of a reference signal port set configured in the reference signal resource, and the precoding matrix is used for precoding the reference signal subset; and obtaining, by the user equipment (UE), signal received power according to the reference signal subset and the precoding matrix. The signal received power may be obtained under an circumstance that a tilt angle of a base station antenna (e.g., AAS) is controlled flexibly, thereby being beneficial to achieve independent uplink power control and selection of a cell or a node under a scenario of the above-mentioned antenna configuration. | 03-26-2015 |
| 20150109949 | METHOD AND TERMINAL FOR HANDLING CHANNEL STATE INFORMATION - Provided in embodiments of the present application are a method and terminal for handling CSI. The embodiments of the present invention use the terminal to measure and report to a base station first CSI, where the first CSI comprises a first RI, a first PMI, and a first CQI, to acquire a second RI and/or a second PMI on the basis of the first CSI, thus allowing the terminal to utilize the second RI to measure and report to the base station the PMI and CQI corresponding to the second RI; or, the terminal utilizes the second RI and the second PMI to measure and report to the base station the CQI corresponding to the second RI and to the second PMI; or, the terminal utilizes the second PMI to measure and report to the base station the RI and CQI corresponding to the second PMI. | 04-23-2015 |
| 20150110215 | METHOD, USER EQUIPMENT AND BASE STATION FOR DETERMINING PRECODING MATRIX INDICATOR - The present disclosure discloses a method, a user equipment and a base station for determining a PMI. The method includes: receiving a reference signal set sent by a base station; based on the reference signal set, selecting a precoding matrix from a codebook, the codebook at least including a non-constant modulus precoding matrix, the non-constant modulus precoding matrix at least including a non-constant modulus column vector, amplitude values of at least two elements of the non-constant modulus column vector forming a symmetrical sequence; and sending a PMI to the base station, the PMI corresponding to the selected precoding matrix. According to the method, the user equipment and the base station for determining PMI, because the non-constant modulus precoding matrix included in the adopted codebook can adjust the shape of a beam, antennas may focus power on a hotspot region, and thus a load balance may be effectively realized. | 04-23-2015 |
| 20150117249 | METHOD FOR ACQUIRING CHANNEL QUALITY INDICATOR, USER EQUIPMENT, EVOLVED NODE B AND SYSTEM - This application relates to a method for acquiring a CQI, a user equipment, an eNB and a system. The method includes: calculating CQIs of at least two subbands, where there is an overlapped resource block between the subbands; and transmitting the subband CQIs to an eNB. In the method for acquiring a channel quality indicator, the user equipment, the evolved node B and the system of the present application, there is an overlapped resource block between adjacent subbands, and meanwhile the channel quality of the resource block of the subband is obtained by using different subbands, thus the feedback accuracy of the channel quality of the resource block of each subband, especially the channel quality of the resource block in the subband overlapping area, thereby improving the granularity of frequency-selective scheduling, and improving the frequency-selective scheduling and the link adaptation, and therefore, the system throughput is increased. | 04-30-2015 |
| 20150230216 | METHOD AND DEVICE FOR SCRAMBLING SEQUENCE CONFIGURATION, USER EQUIPMENT, AND BASE STATION - A method and a device for scrambling sequence configuration, a user equipment and a base station are provided. The method includes: obtaining a search space and/or a transmission mode corresponding to an enhanced control channel; performing a scrambling initialization operation according to the search space and/or the transmission mode, and determining an initialization value of a scrambling sequence; determining the scrambling sequence according to the initialization value of the scrambling sequence; and scrambling a transmission signal transmitted by the enhanced control channel according to the scrambling sequence and then transmitting, so that a user equipment which receives the transmission signal performs a descrambling operation according to the scrambling sequence in the transmission signal. Randomization of interferences between different cells or terminals can be guaranteed as far as possible. | 08-13-2015 |
| 20150244444 | METHOD FOR REPORTING CHANNEL STATE INFORMATION, USER EQUIPMENT, AND BASE STATION - The present disclosure relates to a method for reporting channel state information, a user equipment, and a base station. A channel state information measurement resource is determined by a UE according to an aperiodic CSI trigger signaling, so that a base station transmits a CSI-RS only when the UE needs to report the aperiodic CSI. Compared with transmitting a periodic CSI-RS by an existing base station, unnecessary transmitting of the CSI-RS is reduced, and energy of the base station such as an eNB is saved; and reducing the CSI-RS transmission may reduce resources occupied by the CSI-RS, thereby improving the spectrum efficiency of the system. In addition, reducing unnecessary CSI-RS transmission allows the interference in other cells by the base station being reduced; finally, CSI measurement resources are reserved only when the CSI needs to be fed back, the cost occupied by the CSI measurement resources is reduced. | 08-27-2015 |
| 20150327224 | DETECTING METHOD, TRANSMITTING METHOD AND APPARATUS FOR COMMON CONTROL CHANNEL - Embodiments of the present invention provide a detecting method, a transmitting method and an apparatus for a common control channel. The detecting method includes: determining a candidate resource set within virtual downlink resources of a current cell. The candidate resource set can include at least one candidate resource carrying a common control channel of the current cell. A detection is performed on at least one candidate resource in the candidate resource set, so as to acquire the common control channel of the current cell. In the embodiments of the present invention, a selection range of resources for transmitting a common control channel is extended, so that inter-cell interference of the common control channel can be coordinated, and a detection performance of the common control channel can be improved. | 11-12-2015 |
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| 20080256163 | APPARATUS AND METHOD OF GENERATING CODEBOOK FOR MULTIPLE INPUT MULTIPLE OUTPUT COMMUNICATION SYSTEM - An apparatus and method of generating a codebook. The codebook generation apparatus includes a matrix extender to generate a candidate matrix set by multiplying a base matrix and at least one diagonal matrix, wherein the at least one diagonal matrix includes elements of a constrained set as diagonal elements; and a codebook generator to generate the codebook where a minimum distance between the elements is maximized, based on the candidate matrix set. According to aspects of the present invention, it is possible to provide a precoding codebook that can reduce an amount of feedback from a terminal. | 10-16-2008 |
| 20110255613 | System and Method for Feeding Back Channel Information - A system and method for feeding back channel information are provided. A method for communications device operations includes generating feedback information, encoding the feedback information to produce a feedback payload, and transmitting the feedback payload to a communications server serving a communications device. The feedback information includes at least a first long term wideband channel statistics and a second long term wideband channel statistics. | 10-20-2011 |
| 20110273993 | System and Method for Reporting Quantized Feedback Information for Adaptive Codebooks - A system and method for reporting quantized feedback information for adaptive codebooks include generating channel state information, encoding all or part of the channel state information to produce a feedback payload and transmitting the feedback payload to a base station from a mobile station. The channel state information comprises a rank indicator, a first matrix indicator, a wideband channel quality indicator, a second matrix indicator and at least one narrowband channel quality indicator. When the rank indicator is greater than 1, the first matrix indicator is reported in a second report. On the other hand, when the rank indicator is equal to 1, the content of the first matrix indicator is split between a second report and a third report. | 11-10-2011 |
| 20120027125 | CODEBOOK, CODEBOOK CREATING METHOD, UPLINK TRANSMISSION METHOD AND EQUIPMENT BASED ON THE CODEBOOK - A codebook, a codebook creating method, and an uplink transmission method and equipment based on the codebook are provided. A new codebook is put forward in the method. The codebook includes one or any combination of the following elements: | 02-02-2012 |
| 20120063500 | System and Method for Channel State Information Feedback in Wireless Communications Systems - A system and method for channel state information feedback in wireless communications systems are provided. A method for reporting channel information includes determining, at a user equipment, a channel information type for first channel information to be reported to a communications controller, determining the first channel information conditioned on previously reported channel information and on the channel information type, and reporting the first channel information, the channel information type, or a combination thereof, to the communications controller. | 03-15-2012 |
| 20120087422 | METHOD FOR GENERATING CODEBOOK, METHOD AND APPARATUS FOR DATA TRANSMISSION - A method for generating a codebook and a method and an apparatus for data transmission are provided. The method includes: receiving a label of a codeword sent by a User Equipment (UE); selecting the codeword identified by the label from the codebook for eight-antenna; and coding data to be sent by using the codeword. The codebook for eight-antenna includes at least one rank-8 codeword for eight-antenna. The rank-8 codeword for eight-antenna is generated by multiplying an inverse matrix of a rotation matrix for eight-antenna with an eight-dimensional matrix formed by rank-4 codewords for four-antenna; or generated by extending rank-4 codewords for eight-antenna, where the rank-4 codeword for eight-antenna is generated according to codewords for four-antenna. Therefore, the codeword in the codebook for eight-antenna is applicable to scenarios including dual-polarization strong correlation, dual-polarization weak correlation, single-polarization strong correlation, and single-polarization weak correlation, etc. | 04-12-2012 |
| 20120087429 | Method, Codebook and Base Station for Precoding - A method, a codebook, and a Base Station (BS) for precoding are provided. The precoding method includes: obtaining a total uplink power of a User Equipment (UE); if the total uplink power is greater than ¾ of a rated total transmit power of antennas, selecting a codeword from a first codebook with imbalanced power between layers; otherwise, selecting a codeword from the first codebook and a second codebook with balanced power between layers, so as for precoding data to be transmitted according to the selected codeword. | 04-12-2012 |
| 20120121031 | Method and Apparatus for Demodulation of a Reference Signal - A method for wireless network communication is provided. The method comprises determining, by a transmitter including a quantity of antennas, a quantity of transmitted layers; mapping a quantity of data symbols to the antennas using a quantity of precoders; generating a quantity of demodulation reference signal (DMRS) antenna ports based on the quantities of the antennas, the transmitted layers, and the precoders; and determining whether to precode at least one of the DMRS antenna ports with the precoders. The method further maps the precoded data symbols and the DMRS antenna ports to a quantity of resource elements. The method then modulates a signal comprising the resource elements and transmits the modulated signal to a receiver. Subsequently, the method estimates a channel received by the receiver over the DMRS antenna ports. | 05-17-2012 |
| 20120163439 | Precoding Method and Apparatus in Multiple Input Multiple Output System - Embodiments of the present invention disclose a precoding method and apparatus in a multiple input multiple output system. The method includes receiving a non-constant modulus channel information matrix fed back by a UE; processing the non-constant modulus channel information matrix and removing amplitude information, and obtaining a precoding matrix according to a constant modulus channel information matrix; and precoding data to be sent by using the precoding matrix. | 06-28-2012 |
| 20120189075 | METHOD AND APPARATUS FOR OBTAINING PRECODING MATRIX INDICATOR - The present disclosure discloses a method and an apparatus for obtaining a precoding matrix indicator, and relates to the field of communication technologies. The method includes: obtaining a first rotation matrix according to first channel information; obtaining a first differential matrix according to the first rotation matrix and a currently-obtained instantaneous beam forming matrix/precoding matrix; and quantizing, according to a first differential codebook, a pre-acquired first rank indicator, and preset quantization criteria, the first differential matrix to obtain a differential precoding matrix indicator. The apparatus includes: a first rotation matrix obtaining module, a first differential matrix obtaining module, and a differential precoding matrix indicator obtaining module. In the present disclosure, the differential PMI is obtained according to the channel information, and the differential PMI is used for feedback, which not only reduces an overhead, but also improves feedback accuracy. | 07-26-2012 |
| 20120275500 | METHOD AND APPARATUS FOR ACQUIRING A PRECODING MATRIX INDICATOR AND A PRECODING MATRIX - In the field of communication technologies, a method and an apparatus for acquiring a Precoding Matrix Indicator (PMI) and a Precoding Matrix (PM) are provided. The method includes: acquiring a reference PMI and a differential PMI according to a first non-differential codebook and a first diagonal differential codebook, where codewords included in the first diagonal differential codebook form a diagonal matrix. The apparatus includes a PMI acquiring module. Acquiring a reference PMI and a differential PMI according to a non-differential codebook and a diagonal differential codebook can reduce the feedback overhead or improve the feedback precision; and the fact that codewords included in the diagonal differential codebook form a diagonal matrix can maintain amplitude characteristics (for example, a constant modulus characteristic, and a finite character set constraint characteristic) of elements of the non-differential codebook or facilitate power distribution among antennas. | 11-01-2012 |
| 20120328039 | METHOD AND SYSTEM FOR PRECODING DATA - The present disclosure relates to channel state feedback in a communication system. The method includes obtaining a reference signal from an access point; deriving a rank indication, a codebook subset selection indication and a precoding matrix index based on the obtained reference signal; sending a first feedback message conveying the rank indication and the codebook subset selection indication, and sending a second feedback message conveying the precoding matrix index, to the access point; and receiving, from the access point, data precoded by a matrix derived based on the rank indication, the codebook subset selection indication and the precoding matrix index. | 12-27-2012 |
| 20130010586 | METHOD AND APPARATUS FOR RESOURCE MAPPING AND CODE DIVISION MULTIPLEXING - The present disclosure discloses a method and an apparatus for resource mapping and code division multiplexing. In the present disclosure, each cell selects a mapping scheme among at least two mapping schemes to implement resource mapping, which effectively reduces interference imposed on reference signal symbols of users at the edge of a cell; vector switching is performed for an orthogonal matrix to obtain multiple different codeword sequences and implement codeword design. | 01-10-2013 |
| 20130021897 | RETRANSMISSION METHOD AND APPARATUS AND COMMUNICATION SYSTEM - The present invention relates to the field of communications technologies, and discloses a retransmission method and apparatus, and a communication system. The method includes: after sending two channel-coded codewords in initial transmission, receiving a retransmission indication, where the retransmission indication includes an identifier of one channel-coded codeword to be retransmitted; according to a preset phase of each symbol, determining a precoding matrix of each symbol of the one channel-coded codeword to be retransmitted, where a phase relationship of each symbol is fixed; and after coding, by using the precoding matrix, each symbol of the one channel-coded codeword to be retransmitted, transmitting the coded symbol through an antenna. Through the present invention, a guarantee can be provided for retransmission success of a UE. | 01-24-2013 |
| 20130114392 | METHOD AND APPARATUS FOR RESOURCE MAPPING AND CODE DIVISION MULTIPLEXING - The present disclosure discloses a method and an apparatus for resource mapping and code division multiplexing. In the present disclosure, each cell selects a mapping scheme among at least two mapping schemes to implement resource mapping, which effectively reduces interference imposed on reference signal symbols of users at the edge of a cell; vector switching is performed for an orthogonal matrix to obtain multiple different codeword sequences and implement codeword design, so that a problem that the output power of reference signal symbols is unbalanced can be effectively alleviated. | 05-09-2013 |
| 20130121437 | METHOD AND APPARATUS FOR ACQUIRING A PRECODING MATRIX INDICATOR AND A PRECODING MATRIX - In the field of communication technologies, a method and an apparatus for acquiring a Precoding Matrix Indicator (PMI) and a Precoding Matrix (PM) are provided. The method includes: acquiring a reference PMI and a differential PMI according to a first non-differential codebook and a first diagonal differential codebook, where codewords included in the first diagonal differential codebook form a diagonal matrix. The apparatus includes a PMI acquiring module. Acquiring a reference PMI and a differential PMI according to a non-differential codebook and a diagonal differential codebook can reduce the feedback overhead or improve the feedback precision; and the fact that codewords included in the diagonal differential codebook form a diagonal matrix can maintain amplitude characteristics (for example, a constant modulus characteristic, and a finite character set constraint characteristic) of elements of the non-differential codebook or facilitate power distribution among antennas. | 05-16-2013 |
| 20130250886 | METHOD, BASE STATION AND USER EQUIPMENT FOR TRANSMITTING CHANNEL QUALITY INFORMATION - Methods and apparatus are provided for transmitting channel quality information. User equipment receives a control signaling for uplink scheduling. The control signaling for uplink scheduling includes at least one modulation and coding scheme (MCS) field, a channel quality information request field, and a resource block allocation field indicating the number of resource blocks (RBs), N | 09-26-2013 |
| 20130294538 | METHOD FOR GENERATING CODEBOOK, METHOD AND APPARATUS FOR DATA TRANSMISSION - A method for generating a codebook and a method and an apparatus for data transmission are provided. The method includes: receiving a label of a codeword sent by a User Equipment (UE); selecting the codeword identified by the label from the codebook for eight-antenna; and coding data to be sent by using the codeword. The codebook for eight-antenna includes at least one rank-8 codeword for eight-antenna. The rank-8 codeword for eight-antenna is generated by multiplying an inverse matrix of a rotation matrix for eight-antenna with an eight-dimensional matrix formed by rank-4 codewords for four-antenna; or generated by extending rank-4 codewords for eight-antenna, where the rank-4 codeword for eight-antenna is generated according to codewords for four-antenna. Therefore, the codeword in the codebook for eight-antenna is applicable to scenarios including dual-polarization strong correlation, dual-polarization weak correlation, single-polarization strong correlation, and single-polarization weak correlation, etc. | 11-07-2013 |
| 20140056282 | INTERFERENCE COORDINATION METHOD, BASE STATION, AND COMMUNICATION SYSTEM - Embodiments of the present invention provide an interference coordination method, a base station, and a communication system. The method includes: acquiring first user channel state information on a first time-frequency resource on which interference coordination is to be performed; acquiring second user channel state information on the first time-frequency resource; pairing a first user and a second user according to the first user channel state information and the second user channel state information to obtain transmit power and a precoding matrix that are corresponding to the second user; and transmitting data to the second user on the first time-frequency resource according to the transmit power and the precoding matrix, but not transmitting data to the first user on the first time-frequency resource. | 02-27-2014 |
| 20140092874 | METHOD AND APPARATUS FOR RESOURCE MAPPING AND CODE DIVISION MULTIPLEXING - The present disclosure discloses a method and an apparatus for resource mapping and code division multiplexing. In the present disclosure, each cell selects a mapping scheme among at least two mapping schemes to implement resource mapping, which effectively reduces interference imposed on reference signal symbols of users at the edge of a cell; vector switching is performed for an orthogonal matrix to obtain multiple different codeword sequences and implement codeword design, so that a problem that the output power of reference signal symbols is unbalanced can be effectively alleviated. | 04-03-2014 |
| 20140098770 | METHOD, APPARATUS, AND SYSTEM FOR COMP RETRANSMISSION - The present invention provides a method, an apparatus, and a system for CoMP retransmission. The method includes: sending downlink control signaling to a user equipment UE, so that the UE receives, according to the downlink control signaling, an initially transmitted signal sent by a serving transmission point and a cooperative transmission point by joint processing mode; receiving first NAK information corresponding to the initially transmitted signal and returned by the UE, and sending a retransmitted signal corresponding to the initially transmitted signal to the UE according to the first NAK information, where the initially transmitted signal also corresponds to second NAK information sent by the UE to the cooperative transmission point, where the second NAK information is used to instruct the cooperative transmission point to, when the serving transmission point sends the retransmitted signal to the UE, reduce interference to the UE with scheduling. | 04-10-2014 |
| 20140119228 | METHOD FOR CONFIGURING REFERENCE SIGNAL, UE, AND ENB - The present invention provides a method for configuring a reference signal, a UE, and an eNB. The method includes: determining, by a UE, a reference signal configuration priority set, and sending information of the reference signal configuration priority set to an eNB; and receiving, by the UE, a reference signal configuration measurement set sent by the eNB, where the reference signal configuration measurement set is configured by the eNB according to the information of the reference signal configuration priority set, and the reference signal configuration measurement set is used for the UE to measure and feed back channel state information. In embodiments of the present invention, a reference signal configuration matched with an optimal actual channel of a UE can be selected when an RRH or a base station is geographically separated, so that the UE can acquire a good channel condition. | 05-01-2014 |
| 20140119325 | Method, Terminal, and Base Station for Feeding Back Channel Information - Embodiments of the present invention disclose a method, terminal, and base station for feeding back channel information. The method includes determining that channel information between access points needs to be fed back and sending feedback content to a base station on a resource configured by the base station, wherein the feedback content includes at least channel adjustment information between a reference access point and a non-reference access point. The resource configured by the base station includes a dedicated resource used to feed back the channel adjustment information and configured by the base station, or all or a part of resources used for periodic feedback and configured by the base station, or all or a part of resources used for aperiodic feedback and configured by the base station. | 05-01-2014 |
| 20140133595 | METHOD AND SYSTEM FOR PRECODING DATA - The present disclosure relates to channel state feedback in a communication system. The method includes obtaining a reference signal from an access point; deriving a rank indication, a codebook subset selection indication and a precoding matrix index based on the obtained reference signal; sending a first feedback message conveying the rank indication and the codebook subset selection indication, and sending a second feedback message conveying the precoding matrix index, to the access point; and receiving, from the access point, data precoded by a matrix derived based on the rank indication, the codebook subset selection indication and the precoding matrix index. | 05-15-2014 |
| 20140146778 | MULTI-ANTENNA TRANSMISSION METHOD AND APPARATUS - The present invention relates to the field of communications technologies and provides a multi-antenna transmission method and apparatus, which can reduce interference and improve system throughput. In the solutions provided in embodiments of the present invention, a reference signal RS configuration set sent by an eNB is received, CSI corresponding to each RS configuration in the RS configuration set is acquired based on the RS configuration set, the CSI set is sent to the eNB, then a signal sent by the eNB according to the CSI set is received, and data processing is performed. The solutions provided in the embodiments of the present invention apply to multi-antenna signal transmission. | 05-29-2014 |
| 20140169494 | METHOD FOR GENERATING CODEBOOK, METHOD AND APPARATUS FOR DATA TRANSMISSION - A method for generating a codebook and a method and an apparatus for data transmission are provided. The method includes: receiving a label of a codeword sent by a User Equipment (UE); selecting the codeword identified by the label from the codebook for eight-antenna; and coding data to be sent by using the codeword. The codebook for eight-antenna includes at least one rank-8 codeword for eight-antenna. The rank-8 codeword for eight-antenna is generated by multiplying an inverse matrix of a rotation matrix for eight-antenna with an eight-dimensional matrix formed by rank-4 codewords for four-antenna; or generated by extending rank-4 codewords for eight-antenna, where the rank-4 codeword for eight-antenna is generated according to codewords for four-antenna. Therefore, the codeword in the codebook for eight-antenna is applicable to scenarios including dual-polarization strong correlation, dual-polarization weak correlation, single-polarization strong correlation, and single-polarization weak correlation, etc. | 06-19-2014 |
| 20140192744 | METHOD AND APPARATUS FOR COORDINATED MULTI-NODE TRANSMISSION - Embodiments of the present invention provide a method and an apparatus for coordinated multi-node transmission The method includes: acquiring, by a user equipment, channel state indicator information of each coordinating node; feeding back, by the user equipment, all information or a part of information in the acquired channel state indicator information to a base station, so that each coordinating node performs, according to the channel state indicator information that has been fed back, scheduling on the user equipment and/or one or more other user equipments served by each coordinating node; and if the user equipment is scheduled, receiving, by the user equipment, scheduling result notification information sent by the base station, and receiving, by the user equipment according to the scheduling result notification information, data transmitted by a base station that corresponds to a coordinating node serving the user equipment. The present invention is applicable to a radio communications system. | 07-10-2014 |
| 20140211723 | INTERFERENCE MEASUREMENT INDICATION METHOD, INTERFERENCE MEASUREMENT METHOD, RELATED DEVICE, AND COMMUNICATION SYSTEM - Embodiments of the present invention disclose an interference measurement indication method, an interference measurement method, a related device, and a communication system. The interference measurement indication method includes: transmitting, by a base station, at least one piece of first-type channel state information reference signal CSI-RS configuration signaling to a user equipment UE, where the at least one piece of first-type CSI-RS configuration signaling indicates a first resource set used for CSI-RS transmission; and transmitting, by the base station, at least one piece of second-type CSI-RS configuration signaling to the UE, where a second resource set used for CSI-RS transmission, which is indicated by the at least one piece of second-type CSI-RS configuration signaling, is a subset of the first resource set. Technical solutions provided by the embodiments of the present invention help improve the flexibility of interference measurement of the UE. | 07-31-2014 |
| 20140219380 | METHOD AND APPARATUS FOR TRANSMITTING PRECODING MARTRIX INDEX AND PERFORMING PRECODING - A method and an apparatus for sending a Precoding Matrix Index (PMI) and performing precoding are provided in the embodiments of the present invention. The method for sending the PMI comprises the following steps: a user equipment acquires the transmission channel capability of carrying the PMI; according to the transmission channel capability of carrying the PMI, the precoding matrices are selected from a locally-stored first codebook set to form a second codebook set; a first precoding matrix is selected from the second codebook set; an index corresponding to the first precoding matrix is sent to a base station over the transmission channel so as to make the base station can find out the first precoding matrix according to the index and precode the data according to the first precoding matrix. The embodiments of the present invention can realize the flexible configuration and use of the PMI. | 08-07-2014 |
| 20140241193 | METHOD AND SYSTEM FOR MEASURING A CHANNEL QUALITY INDICATOR, USER EQUIPMENT AND BASE STATION - Embodiments of the present invention provide a method and a system for measuring a channel quality indicator, a user equipment and a base station. The method includes: obtaining a channel quality indicator configuration, where the channel quality indicator configuration includes a first combination, and the first combination includes a valid signal processing manner and an interfering signal processing manner; performing valid signal processing and interfering signal processing according to the valid signal processing manner and the interfering signal processing manner in the first combination to obtain a valid signal and an interfering signal; performing channel quality indicator calculation according to the valid signal and the interfering signal to obtain a channel quality indicator; and feeding the channel quality indicator back to a base station. | 08-28-2014 |
| 20140241194 | METHOD AND DEVICE FOR MEASURING CHANNEL QUALITY - A method and a device for measuring channel quality are provided. The method includes: receiving first signal characteristic information and second signal characteristic information sent by a network side, where the first signal characteristic information is used to indicate a first signal, and the second signal characteristic information is used to indicate a second signal; receiving a downlink signal sent by each node in multiple nodes, obtaining a downlink channel response and downlink interference of each node respectively according to the first signal and the second signal in the downlink signal sent by each node; obtaining downlink channel quality information of each node according to the downlink channel response and the downlink interference of each node; and reporting the downlink channel quality information of each node to the network side. According to embodiments of the present invention, overheads for the node to send signaling is greatly lowered. | 08-28-2014 |
| 20140241198 | METHOD FOR MEASURING AND FEEDING BACK RADIO RESOURCE MANAGEMENT INFORMATION, BASE STATION, AND USER EQUIPMENT - The present application discloses a method for measuring and feeding back radio resource management information, a base station, and a user equipment, relates to the field of communications. The method includes: receiving, by a user equipment UE, a measurement indication from a base station, where the measurement indication includes: information used for indicating, to the UE, at least one channel-state information-reference signal CSI-RS resource used for measuring a received signal strength indicator RSSI; acquiring, by the UE, at least one RSSI according to the measurement indication; acquiring, by the UE, at least one reference signal received quality RSRQ according to the at least one RSSI, where the at least one RSRQ is one-to-one corresponding to the at least one RSSI; and feeding back, by the UE, the at least one RSRQ to the base station. | 08-28-2014 |
| 20140334571 | METHOD AND APPARATUS FOR ACQUIRING A PRECODING MATRIX INDICATOR AND A PRECODING MATRIX - In the field of communication technologies, a method and an apparatus for acquiring a Precoding Matrix Indicator (PMI) and a Precoding Matrix (PM) are provided. The method includes: acquiring a reference PMI and a differential PMI according to a first non-differential codebook and a first diagonal differential codebook, where codewords included in the first diagonal differential codebook form a diagonal matrix. The apparatus includes a PMI acquiring module. Acquiring a reference PMI and a differential PMI according to a non-differential codebook and a diagonal differential codebook can reduce the feedback overhead or improve the feedback precision; and the fact that codewords included in the diagonal differential codebook form a diagonal matrix can maintain amplitude characteristics (for example, a constant modulus characteristic, and a finite character set constraint characteristic) of elements of the non-differential codebook or facilitate power distribution among antennas. | 11-13-2014 |
| 20140355548 | DATA TRANSMISSION METHOD, USER EQUIPMENT, AND BASE STATION - Embodiments of the present invention provide a data transmission method, a user equipment, and a base station. The method includes: obtaining a resource element RE configuration, where an RE indicated by the RE configuration is a subset of the RE available for sending a channel state information reference signal CSI-RS and is the RE onto which a data symbol can be mapped; and receiving, according to the RE configuration, the data symbol that is sent by a base station on the RE indicated by the RE configuration. In the embodiments of the present invention, a data symbol can be mapped onto the RE that is used for sending the CSI-RS, so that a UE can receive the data symbol on the RE that is used for sending the CSI-RS, thereby improving the utilization efficiency of the RE. | 12-04-2014 |
| 20150023289 | DATA TRANSMISSION METHOD AND SYSTEM, BASE STATION AND USER EQUIPMENT - Embodiments of the present invention provide a data transmission method and system, a base station, and a user equipment (UE). The method includes: obtaining, by a base station, a second number of physical resource blocks (PRBs) according to a first number of PRBs, where the second number of PRBs is smaller than the first number of PRBs, and the first number of PRBs is exactly divisible by the second number of PRBs; sending, by the base station, indication information to a UE, where the indication information is used to indicate the second number of PRBs or an encoded bit repetition multiple, and the encoded bit repetition multiple is equal to the first number of PRBs divided by the second number of PRBs; and obtaining, by the UE, the encoded bit repetition multiple according to the indication information, and performing data transmission according to the encoded bit repetition multiple. | 01-22-2015 |
| 20150029913 | SIGNAL TRANSMISSION METHOD AND APPARATUS - A signal transmission method and apparatus are provided. The method includes generating a first signal according to at least one protocol layer of a first protocol stack and a second protocol stack, and sending the first signal to a receive end by using a first uplink carrier; and/or receiving, by using a first downlink carrier, a third signal sent by receive end, and parsing the third signal according to the at least one protocol layer of the first protocol stack and the second protocol stack; where the first protocol stack is used to implement communication between a base station and a user equipment on a base station side, the second protocol stack is used to implement communication between devices, and the second protocol stack is connected to the at least one protocol layer of the first protocol stack. Therefore, signal transmission can be implemented by using uplink and downlink carriers. | 01-29-2015 |
| 20150049831 | PRECODING PROCESSING METHOD AND USER EQUIPMENT - A precoding processing method and user equipment are disclosed. The precoding processing method includes: selecting a codebook vector for performing precoding processing for data among a codebook set of N | 02-19-2015 |
| 20150071253 | Method, Codebook and Base Station for Precoding - A method, a codebook, and a Base Station (BS) for precoding are provided. The precoding method includes: obtaining a total uplink power of a User Equipment (UE); if the total uplink power is greater than ¾ of a rated total transmit power of antennas, selecting a codeword from a first codebook with imbalanced power between layers; otherwise, selecting a codeword from the first codebook and a second codebook with balanced power between layers, so as for precoding data to be transmitted according to the selected codeword. | 03-12-2015 |
| 20150078474 | METHOD AND SYSTEM FOR PRECODING DATA - The present disclosure relates to channel state feedback in a communication system. The method includes obtaining a reference signal from an access point; deriving a rank indication, a codebook subset selection indication and a precoding matrix index based on the obtained reference signal; sending a first feedback message conveying the rank indication and the codebook subset selection indication, and sending a second feedback message conveying the precoding matrix index, to the access point; and receiving, from the access point, data precoded by a matrix derived based on the rank indication, the codebook subset selection indication and the precoding matrix index. | 03-19-2015 |
| 20150085955 | METHOD AND APPARATUS FOR TRANSMITTING PRECODING MARTRIX INDEX AND PREFORMING PRECODING - A method and an apparatus for sending a Precoding Matrix Index (PMI) and performing precoding are provided in the embodiments of the present invention. The method for sending the PMI comprises the following steps: a user equipment acquires the transmission channel capability of carrying the PMI; according to the transmission channel capability of carrying the PMI, the precoding matrices are selected from a locally-stored first codebook set to form a second codebook set; a first precoding matrix is selected from the second codebook set; an index corresponding to the first precoding matrix is sent to a base station over the transmission channel so as to make the base station can find out the first precoding matrix according to the index and precode the data according to the first precoding matrix. The embodiments of the present invention can realize the flexible configuration and use of the PMI. | 03-26-2015 |
| 20150098516 | METHOD FOR DETERMINING PRECODING MATRIX INDICATOR, USER EQUIPMENT, AND BASE STATION EVOLVED NODEB - The present invention relates to a method for determining a precoding matrix indicator, a user equipment UE, a base station eNB, and a system. The method includes: receiving a reference signal sent by a base station; selecting, based on the reference signal, a precoding matrix from a codebook, where a precoding matrix W included in the codebook is a product of two matrices W | 04-09-2015 |
| 20150124638 | METHOD FOR VIRTUAL CARRIER AGGREGATION, BASE STATION, AND USER EQUIPMENT - A method for virtual carrier aggregation, a base station, and a user equipment are provided. A base station receives measurement capability indication information and indication information indicating a capability of receiving data transmission that are reported by a UE. The base station selects a measurement set for the UE according to the measurement capability indication information, and sends the measurement set to the UE, where the indication information indicating the capability of receiving data transmission includes information of carriers on which the UE supports concurrent receiving of data transmission and the measurement capability indication information includes indication information indicating a capability of the UE for measuring CSI and/or indication information indicating a capability of the UE for measuring RSRP. The base station can flexibly select an activated carrier set for the UE. | 05-07-2015 |
| 20150124707 | System and Method for Channel State Information Feedback in Wireless Communications Systems - A system and method for channel state information feedback in wireless communications systems are provided. A method for reporting channel information includes determining, at a user equipment, a channel information type for first channel information to be reported to a communications controller, determining the first channel information conditioned on previously reported channel information and on the channel information type, and reporting the first channel information, the channel information type, or a combination thereof, to the communications controller. | 05-07-2015 |
| 20150131591 | Method for Assigning Number of Control Channel Candidates and Number of Blind Detection Times, Base Station, and User Equipment - The present invention provides a method for assigning the number of control channel candidates and the number of blind detection times, a base station, and a user equipment. The method includes determining a first aggregation level set {L | 05-14-2015 |
| 20150139022 | METHOD AND SYSTEM FOR DATA DEMODULATION, AND USER EQUIPMENT - The present invention discloses a method and a system for data demodulation, and a user equipment. An interference statistic characteristic is measured by using an IMR instead of a CRS or a non-zero power CSI-RS, so that the obtained interference statistic characteristic can truly reflect an interference statistic characteristic that a DMRS actually experiences, and then a PDSCH is demodulated, so as to improve accuracy of channel estimation. | 05-21-2015 |
| 20150146622 | METHOD, TERMINAL, AND BASE STATION FOR TRANSMITTING INFORMATION - Embodiments of the present application provide a method, a terminal, and a base station for transmitting information. In the embodiments of the present application, subframe configuration information of a first carrier is obtained, where the subframe configuration information is used to indicate a type-1 subframe of the first carrier and a type-2 subframe of the first carrier, the type-1 subframe is used for the base station to transmit, in system bandwidth, first information including a first CRS, the first CRS is used for demodulation, and the type-2 subframe is not used for the base station to transmit a CRS used for demodulation, so that the terminal can receive, according to the subframe configuration information and on the first carrier, information sent by the base station. | 05-28-2015 |
| 20150162963 | METHOD FOR GENERATING CODEBOOK, METHOD AND APPARATUS FOR DATA TRANSMISSION - A method for generating a codebook and a method and an apparatus for data transmission are provided. The method includes: receiving a label of a codeword sent by a User Equipment (UE); selecting the codeword identified by the label from the codebook for eight-antenna; and coding data to be sent by using the codeword. The codebook for eight-antenna includes at least one rank-8 codeword for eight-antenna. The rank-8 codeword for eight-antenna is generated by multiplying an inverse matrix of a rotation matrix for eight-antenna with an eight-dimensional matrix formed by rank-4 codewords for four-antenna; or generated by extending rank-4 codewords for eight-antenna, where the rank-4 codeword for eight-antenna is generated according to codewords for four-antenna. Therefore, the codeword in the codebook for eight-antenna is applicable to scenarios including dual-polarization strong correlation, dual-polarization weak correlation, single-polarization strong correlation, and single-polarization weak correlation, etc. | 06-11-2015 |
| 20150189638 | COMMUNICATION METHOD, BASE STATION, RADIO COMMUNICATION NODE, AND USER EQUIPMENT - A communication method, a base station, a radio communication node, and a user equipment are provided. A base station determines first resource configuration information, where the first resource configuration information is used for indicating N radio resource sets that are used when N radio communication nodes separately perform communication with a user equipment UE, and the radio resource includes a time domain resource and/or a frequency domain resource. The base station sends the first resource configuration information to the UE, where the UE communicates with a corresponding transmission point by using respective radio resource sets of transmission points, and the respective radio resource sets of the transmission points do not intersect. Therefore, a base station does not need to schedule a radio resource, thereby lowering a delay requirement on a backhaul link and eliminating interference. | 07-02-2015 |
| 20150200760 | INTERFERENCE MEASUREMENT METHOD, BASE STATION AND USER EQUIPMENT - Embodiments of the present invention provide an interference measurement method, a base station, and a user equipment. The method includes: determining, by a user equipment, a first resource for interference measurement in a first subframe or determining a second resource not for interference measurement in the first subframe according to at least one of the zero-power CSI-RS configuration information, the non-zero power CSI-RS configuration information, and the CSI-IM configuration information; and performing interference measurement on the first resource, or performing no interference measurement on the second resource. The embodiments of the present invention can improve precision of interference measurement. | 07-16-2015 |
| 20150207604 | CHANNEL-STATE INFORMATION PROCESS PROCESSING METHOD, NETWORK DEVICE, AND USER EQUIPMENT - Embodiments of the present invention provide a channel-state information process processing method, a network device, and a user equipment, where the channel-state information process processing method includes: after receiving a first channel-state information CSI request sent by a first network device, if CSI corresponding to multiple aperiodic CSI processes has not been reported by a user equipment, dropping CSI corresponding to a part of aperiodic CSI processes among the multiple aperiodic CSI processes, where each CSI process is associated with a channel measurement resource and an interference measurement resource. A problem existing after a CoMP technology is introduced can be solved that the UE cannot implement processing of multiple CSI processes. | 07-23-2015 |
| 20150208396 | CONTROL INFORMATION SENDING METHOD, RECEIVING METHOD, AND DEVICE - Embodiments of the present invention provide a control information sending method, receiving method, and device. The control information sending method includes: determining a first subframe of a first radio frame on a first carrier, where the first subframe includes a control region; sending control information in the control region of the first subframe of the first radio frame to a user equipment, where the control information includes a PDCCH; and sending an ePDCCH in a second subframe of the first radio frame to the user equipment. According to the embodiments of the present invention, when control information borne on an ePDCCH cannot be sent in a first radio frame, a PDCCH can still be sent to a user equipment through a control region in a first subframe, thereby achieving purposes of performing uplink/downlink scheduling for the user equipment and downlink feedback for uplink data of the user equipment. | 07-23-2015 |
| 20150236826 | CONTROL CHANNEL DETECTION METHOD, USER EQUIPMENT, AND BASE STATION - Embodiments of the present invention provide a control channel detection method, a user equipment, and a base station, where the method includes: acquiring parameter configuration information corresponding to different control channel resource sets, and detecting a control channel in the corresponding different control channel resource sets according to the parameter configuration information, which therefore implements selection of a dynamic node. | 08-20-2015 |
| 20150249961 | ACCESS METHOD AND DEVICE - Embodiments of the present application provide an access method and device. In the embodiments of the present application, a terminal obtains, according to reference signals sent by a first transmission point and a second transmission point and a first precoding matrix, quality information of the reference signals after a channel corresponding to each transmission point is precoded, so that the terminal is capable of obtaining quality information of precoded reference signals more accurately and the first transmission point switches the terminal to an appropriate second transmission point, thereby implementing flow distribution between all transmission points and improving access reliability of the terminal. | 09-03-2015 |
| 20150256243 | METHOD AND APPARATUS FOR ACQUIRING A PRECODING MATRIX INDICATOR AND A PRECODING MATRIX - In the field of communication technologies, a method and an apparatus for acquiring a Precoding Matrix Indicator (PMI) and a Precoding Matrix (PM) are provided. The method includes: acquiring a reference PMI and a differential PMI according to a first non-differential codebook and a first diagonal differential codebook, where codewords included in the first diagonal differential codebook form a diagonal matrix. The apparatus includes a PMI acquiring module. Acquiring a reference PMI and a differential PMI according to a non-differential codebook and a diagonal differential codebook can reduce the feedback overhead or improve the feedback precision; and the fact that a codeword included in the diagonal differential codebook is a diagonal matrix can maintain amplitude characteristics (for example, a constant modulus characteristic, and a finite character set constraint characteristic) of elements of the non-differential codebook or facilitate power distribution among antennas. | 09-10-2015 |
| 20150288490 | Carrier Allocation Method, User Equipment, and Base Station - The present invention is applicable to the field of radio communication technologies, and provides a carrier allocation method, a user equipment, and a base station. The method comprises: acquiring, by a base station, a carrier hopping pattern; sending, by the base station to a user equipment UE, carrier configuration information, where the carrier configuration information comprises information about activating carrier hopping and/or the carrier hopping pattern, the carrier hopping pattern presents a carrier set used by a user equipment in at least one time unit, and the carrier set comprises at least one carrier; and sending, by the base station, a signal to the UE and/or receiving a signal from the UE according to the carrier hopping pattern | 10-08-2015 |
| 20150304008 | METHOD FOR FEEDING BACKCHANNEL STATE INFORMATION, USER EQUIPMENT, AND BASE STATION - Embodiments of the present invention provide a method for feeding back channel state information, a user equipment, and a base station, to improve feedback precision of channel state information. The method includes: receiving a reference signal sent by a base station; selecting a precoding matrix W from a codebook according to the reference signal, where a column vector of the precoding matrix W may be expressed as α[v e | 10-22-2015 |
| 20150304010 | CHANNEL STATE INFORMATION REPORTING METHOD, USER EQUIPMENT, AND BASE STATION - A channel state information (CSI) reporting method is provided. A reference signal is received from a base station. A precoding matrix is selected, based on the reference signal, from a codebook, where the codebook includes a precoding matrix W and W=αSV, where a matrix V is an N×ν matrix, N is the number of reference signal ports, ν≦N, S is a row selection matrix used to select one or more row vectors from the matrix V, and α is a constant. CSI is sent to the base station, where the CSI includes a precoding matrix indicator PMI and the PMI is corresponding to the selected precoding matrix. A suitable precoding matrix can be selected according to an interference situation, so as to select an antenna for transmitting data and power of the antenna. | 10-22-2015 |
| 20150311966 | METHOD AND SYSTEM FOR PRECODING DATA - The present disclosure relates to channel state feedback in a communication system. The method includes obtaining a reference signal from an access point; deriving a rank indication, a codebook subset selection indication and a precoding matrix index based on the obtained reference signal; sending a first feedback message conveying the rank indication and the codebook subset selection indication, and sending a second feedback message conveying the precoding matrix index, to the access point; and receiving, from the access point, data precoded by a matrix derived based on the rank indication, the codebook subset selection indication and the precoding matrix index. | 10-29-2015 |
| 20150327226 | PDSCH TRANSMISSION METHOD AND APPARATUS - Embodiments of the present invention provide a PDSCH transmission method and apparatus. The method includes: detecting a downlink control channel for scheduling a PDSCH; determining a resource allocation scheme of the PDSCH according to a DCI format of the downlink control channel for scheduling the PDSCH and an attribute of a carrier for carrying the PDSCH; and decoding the PDSCH according to the resource allocation scheme of the PDSCH and a transmission scheme of the PDSCH. The embodiments of the present invention provide an effective solution to PDSCH transmission. | 11-12-2015 |
| 20160006550 | DOWNLINK CHANNEL DECODING METHOD, DOWNLINK INFORMATION TRANSMISSION METHOD, USER EQUIPMENT, AND BASE STATION - The present invention provides a downlink channel decoding method, a downlink information transmission method, a user equipment, and a base station. The downlink channel decoding method includes: determining, by a user equipment, a resource unit occupied by a DMRS; and decoding a downlink channel based on the DMRS transmitted on the resource unit. The present invention can enable different DMRS patterns to concurrently exist on an NCT carrier. In a downlink transmission process, a DMRS pattern used for downlink transmission is determined according to priorities of different channels and/or signals, which can ensure optimal performance of a high-priority channel and/or signal, and can further improve downlink transmission performance. | 01-07-2016 |
| 20160028463 | METHODS AND APPARATUSES FOR RECEIVING AND SENDING REFERENCE SIGNAL, USER EQUIPMENT, AND BASE STATION - Embodiments of the present invention relate to methods and apparatuses for receiving and sending a reference signal, user equipment, and a base station. A method for receiving a reference signal includes: receiving resource configuration information of a reference signal, where the resource configuration information of the reference signal includes information about an antenna port configuration and a reference signal subframe configuration, the antenna port configuration indicates an antenna port structure, and the reference signal subframe configuration indicates a reference signal subframe for sending the reference signal on one or more antenna port groups; and receiving the reference signal according to the resource configuration information of the reference signal. In the embodiments of the present invention, a communications system can adapt to an antenna array structure and more antenna port quantity configurations, which is used for cell selection or MCS selection and scheduling, thereby improving a system throughput. | 01-28-2016 |
| 20160036507 | METHOD FOR REPORTING CHANNEL STATE INFORMATION, USER EQUIPMENT, AND BASE STATION - Embodiments of the present invention provide a method includes: receiving a reference signal sent by a base station; selecting, based on the reference signal, a precoding matrix from a codebook, where a precoding matrix w included in the codebook is a product of three matrices being W | 02-04-2016 |
| 20160043789 | METHOD FOR DETERMINING PRECODING MATRIX INDICATOR, USER EQUIPMENT, AND BASE STATION EVOLVED NODEB - The present invention relates to a method for determining a precoding matrix indicator, a user equipment UE, a base station eNB, and a system. The method includes: receiving a reference signal sent by a base station; selecting, based on the reference signal, a precoding matrix from a codebook, where a precoding matrix W included in the codebook is a product of two matrices W | 02-11-2016 |
| 20160056873 | METHOD, USER EQUIPMENT AND BASE STATION FOR DETERMINING PRECODING MATRIX INDICATOR - The present disclosure discloses a method, a user equipment and a base station for determining a PMI. The method includes: receiving a reference signal set sent by a base station; based on the reference signal set, selecting a precoding matrix from a codebook, the codebook at least including a non-constant modulus precoding matrix, the non-constant modulus precoding matrix at least including a non-constant modulus column vector, amplitude values of at least two elements of the non-constant modulus column vector forming a symmetrical sequence; and sending a PMI to the base station, the PMI corresponding to the selected precoding matrix. According to the method, the user equipment and the base station for determining PMI, because the non-constant modulus precoding matrix included in the adopted codebook can adjust the shape of a beam, antennas may focus power on a hotspot region, and thus a load balance may be effectively realized. | 02-25-2016 |
| 20160065278 | METHOD FOR DETERMINING PRECODING MATRIX INDICATOR, USER EQUIPMENT, AND BASE STATION - A method for determining a precoding matrix indicator, user equipment, and a base station are disclosed in embodiments of the present invention. The method includes: receiving a first reference signal set sent by a base station, where the first reference signal set is associated with a user equipment-specific matrix or matrix set; selecting a precoding matrix based on the first reference signal set, where the precoding matrix is a function of the user equipment-specific matrix or matrix set; and sending a precoding matrix indicator to the base station, where the precoding matrix indicator corresponds to the selected precoding matrix. In the embodiments of the present invention, CSI feedback precision can be improved without excessively increasing feedback overhead, thereby improving system performance. | 03-03-2016 |
| 20160065279 | METHOD FOR DETERMINING PRECODING MATRIX INDICATOR, USER EQUIPMENT, AND BASE STATION - The present invention provides a method for determining a precoding matrix indicator, user equipment, and a base station. The method includes: receiving a first reference signal set sent by a base station; determining, based on the first reference signal set, one or more intermediate matrices, and reporting, to the base station, a first index used to indicate the intermediate matrix; receiving a second reference signal set sent by the base station; and determining, based on the second reference signal set, a precoding matrix, and reporting, to the base station, a precoding matrix indicator used to indicate the precoding matrix, where the precoding matrix is a product W of two matrices W | 03-03-2016 |
| 20160094303 | METHOD AND APPARATUS FOR RESOURCE MAPPING AND CODE DIVISION MULTIPLEXING - The present disclosure discloses a method and an apparatus for resource mapping and code division multiplexing. In the present disclosure, each cell selects a mapping scheme among at least two mapping schemes to implement resource mapping, which effectively reduces interference imposed on reference signal symbols of users at the edge of a cell; vector switching is performed for an orthogonal matrix to obtain multiple different codeword sequences and implement codeword design, so that a problem that the output power of reference signal symbols is unbalanced can be effectively alleviated. | 03-31-2016 |
| 20160105265 | METHOD AND APPARATUS FOR MEASURING COMMUNICATION QUALITY - A method and an apparatus for measuring communication quality are disclosed. The method includes: acquiring reference signal resource configuration information, where the reference signal resource configuration information at least includes: reference signal port configuration information, and reference signal power information of at least one port group; or the reference signal resource configuration information at least includes: reference signal port configuration information, and a ratio of a power of a data channel in at least one port group to a power of a reference signal; and sending the acquired reference signal resource configuration information to user equipment. Therefore, in a multi-antenna system, accurate signal quality measurement information is acquired, or more accurate channel state information is acquired | 04-14-2016 |
| 20160112105 | METHOD AND APPARATUS FOR DETERMINING PRECODING MATRIX INDICATOR, USER EQUIPMENT, AND BASE STATION - A method and an apparatus determine a precoding matrix indicator, user equipment, and a base station. The method includes: determining a precoding matrix indicator PMI, where the PMI corresponds to a precoding matrix W, and the precoding matrix W satisfies a first condition, a second condition, or a third condition; and sending the PMI to a base station. Embodiments of the present invention further provide a corresponding apparatus, and the corresponding user equipment and base station. Technical solutions provided in the embodiments of the present invention can effectively control a beam, especially a beam shape and a beam orientation, in a horizontal direction and a perpendicular direction. | 04-21-2016 |
| 20160112173 | Reference Signal Transmission Method and Apparatus - Embodiments disclose a reference signal transmission method and an apparatus. The method includes receiving reference signal resource configuration information sent by a base station, where the reference signal resource configuration information includes antenna port quantity information and a resource configuration index. The method also includes determining a reference signal configuration from a reference signal configuration set according to the antenna port quantity information and the resource configuration index. The method also includes obtaining, according to the determined reference signal configuration, positions of the resource elements REs that are used to send the reference signal on the antenna ports in the antenna port set, and receiving reference signals according to the positions of the REs. | 04-21-2016 |
