Huawei Technologies Co., Limited

Huangping Jin

Jun Wang

Xiaoyan Bi

Wei Han

Xiaohan Wang

Shibin Ge

Ye Wu

Xiang Ren

Peng Jiang

Ruiqi Zhang

Hongzhe Shi

Yong Liang Liu

Yongping Zhang

Rong Li

Yuanjie Li

Jian Wang

Yinggang Du

Yiqun Ge

Jian Jun Wang

Yong Liu

Shengchen Dai

Lu Wu

Ting Wang

Jin Liu

Hui Wang

Huang Huang

Xiang Gao

Yi Huang

Yiqun Wu

Xiaobo Chen

Shengyue Dou

Jian Li

Min Zhang

Haicun Hang

Lei Huang

Peng Shang

Li Fan

Haifan Yin

Yiling Yuan

Zhimeng Zhong

Baojin Li

Tie Li

Jinyao Liang

Huiying Zhu

Zhitang Chen

Min Cheng

Jing Liang

Shi Jin

Wenkai Zhang

Didi Zhang

Haitan Yin

Junhui Gao

Xioyan Bi

This application discloses a method for sending a demodulation reference signal. In the method, a network device generates a first signal and sends the first signal on a first time-frequency resource. The first signal is formed by superimposing M DMRS port signals, and the delay segmentation locations corresponding to at least two of the M DMRS port signals are different. Because the first signal is formed by superposing the M DMRS port signals, that is, the network device sends a plurality of DMRS port signals on a same time-frequency resource, reference signal overheads can be reduced. The network device can send more DMRS port signals using the same amount time-frequency resources. In this way, the network device can send more streams without increasing signaling overheads.

Method for sending demodulation reference signal, method for receiving demodulation reference signal, and communication apparatus

In accordance with an embodiment, a method includes receiving first indication information from a network device, where the first indication information indicates a first parameter combination including at least two of the following: a first value of M, a first value of β, and a first value of α. The first parameter combination is configured to be used to determine a a maximum of Knon-zero elements for a first coefficient matrix, and Kis determined based on the first values of M, β, and α; sending a second information indication to the network device, where the second indication information indicates Knon-zero elements in the first coefficient matrix, and Kis less than or equal to K.

Communication method and apparatus

This application provides an information transmission method, an apparatus, and a device, which are applicable to the communication field, and are used to feed back information obtained based on channel information of different network devices, so as to improve performance gains and reduce performance loss. The method includes: The terminal device obtains at least one piece of channel information including large-scale information and small-scale information; performs normalization processing on the channel information to obtain at least one piece of first information and at least one piece of second information, where the first information is small-scale information obtained through normalization processing, and the second information is large-scale information obtained through normalization processing; and then sends channel state information including R pieces of first information obtained through quantization processing or including R pieces of first information obtained through quantization processing and R pieces of second information obtained through quantization processing.

Information transmission method, related apparatus, and device

A communication method and apparatus. A terminal device determines channel state information based on S indexes of S vectors. Each of the S vectors is included in a first vector quantization dictionary. The first vector quantization dictionary includes Nvectors, where Nand S are both positive integers. The terminal device sends the channel state information to a network device. Because a vector included in the vector quantization dictionary usually has a relatively large dimension, quantizing channel information by using the first vector quantization dictionary is equivalent to performing dimension expansion on the channel information or maintaining a relatively high dimension. High-precision feedback is implemented by using relatively low signaling overheads.

Embodiments of this application provide an update method and a communications apparatus. The method includes: generating space domain vector update information, where the space domain vector update information is for updating a first group of space domain vectors to obtain a second group of space domain vectors, the space domain vector update information includes a plurality of groups of space domain vector coefficients, and each group of space domain vector coefficients is for performing weighted combination on the first group of space domain vectors, to obtain one space domain vector in the second group of space domain vectors; and sending the space domain vector update information.

Update method and communications apparatus

A method for indicating channel state information CSI measurement and a communication apparatus. A network device indicates, to a terminal device by using first indication information, one or more frequency domain units in a downlink reference signal resource that are used by the terminal device to obtain CSI. The terminal device determines, based on the first indication information, which frequency domain units in the downlink reference signal resource are used to obtain the CSI, and perform measurement in the frequency domain unit to obtain the CSI. The network device flexibly configures CSI measurement based on a system status, to control obtaining of the CSI. This helps the terminal device obtain the CSI more pertinently based on the indication in different cases.

Method for indicating channel state information CSI measurement and communication apparatus

The disclosure provides channel measurement methods and communications apparatuses. One example method includes a terminal device that generates first indication information, and sends the first indication information to a network device. The first indication information indicates one or more component characteristics of a complete time-varying characteristic of a channel and a weighting coefficient of each component characteristic. The complete time-varying characteristic of the channel corresponds to a local time-varying characteristic of the channel. The local time-varying characteristic may be determined by the terminal device based on reference signals received for a plurality of times, and the complete time-varying characteristic may be determined based on the local time-varying characteristic.

Channel measurement method and communications apparatus

Embodiments of this application relate to the field of communications technologies, and disclose a precoding matrix configuration method and apparatus, to help improve performance of decoding data. The method, applied to uplink communication, includes generating first configuration information to configure M precoding matrices, where M is an integer that is equal to or bigger than 2. The method further includes transmitting, to a terminal device, the first configuration information. In response to the uplink transmission is non-codebook-based uplink transmission, the first configuration information comprises first indication information indicating M sounding reference signal resource indicators (SRIs), and where the M SRIs are used to configure the M precoding matrices. In response to the uplink transmission is codebook-based uplink transmission, the first configuration information comprises second indication information indicating M transmit precoding matrix indicators (TPMIs), and where the M TPMIs are used to configure the M precoding matrices.

Precoding matrix configuration method and apparatus

This application relates to the field of communication technologies, and provides an information transmission method and an apparatus. In this method, a radio access network device sends, to a terminal device, first indication information indicating first information and second information and second indication information indicating a first quantity of DFT vectors, the first information indicates a first quantity of to-be-selected ports, and the second information indicates a first compression factor. The radio access network device further sends a reference signal to the terminal device. The terminal device sends downlink channel state information to the radio access network device based on the first indication information, the second indication information, and the reference signal. The compression factor is a compression factor of a complex coefficient matrix. There is a correspondence between the compression factor and a quantity of transport layers.

Information transmission method and apparatus

Example methods and apparatus for configuring a transmit port of a downlink reference signal are described. One example method includes indicating configurations corresponding to a plurality of transmit ports to a terminal device by a network device by using first indication information. Each transmit port may be associated with one piece of delay information, transmit ports associated with same delay information correspond to a same configuration, and at least two transmit ports associated with different delay information correspond to different configurations. The terminal device may receive, based on a configuration corresponding to each transmit port, downlink reference signals sent by the plurality of transmit ports.

Method for configuring transmit port of downlink reference signal and communication apparatus

Embodiments of this application disclose a channel estimation method and apparatus, and relate to the field of communications technologies, to help reduce indication overheads. The method may include: generating and sending indication information, where the indication information is used to indicate M N-dimensional precoding vectors, each precoding vector is applied to one of M frequency bands, the M N-dimensional precoding vectors form a space-frequency matrix, and the space-frequency matrix is generated by performing weighted combination on a plurality of space-frequency component matrices, where the space-frequency matrix is an M×N-dimensional space-frequency vector or an X×Y space-frequency matrix, X and Y are one and the other of M and N, M≥1, N24 2, and both M and N are integers.

Channel estimation method and apparatus

Example precoding vector indication methods, precoding vector determining methods, and communications apparatus to reduce feedback overheads are described. One example method includes generating and sending a channel state information (CSI) report by a terminal device. A network device determines a precoding vector of one or more frequency domain units based on the CSI report. The CSI report is used to indicate M space-frequency units and a weighting coefficient of a part or all of the M space-frequency units, each of the M space-frequency units corresponds to one beam vector and one frequency domain vector, and a weighted sum of the part or all of the M space-frequency units is used to determine the precoding vector of the one or more frequency domain units.

Precoding vector indication method, precoding vector determining method, and communications apparatus

The present disclosure relates to communication methods and communications apparatus. One example method includes determining a plurality of frequency domain units on which reporting of a precoding matrix indicator (PMI) is based in reporting bandwidth. The plurality of frequency domain units include one or more first frequency domain units and third frequency domain units obtained by dividing one or more second frequency domain units. A granularity of the first frequency domain unit is less than a preconfigured first granularity, a granularity of the second frequency domain unit is a first granularity, and a granularity of the third frequency domain unit is a predetermined second granularity. The first granularity is a granularity preconfigured for reporting a channel quality indicator (CQI), a second granularity is a granularity predetermined for reporting the PMI, and the second granularity is less than the first granularity.

Communication method and communications apparatus

This application provides a parameter configuration method and a communications apparatus. The method includes: receiving, by a terminal device, an indication of a first mapping relationship from a network device, where the first mapping relationship is a mapping relationship in a preconfigured first mapping relationship group, and the first mapping relationship group includes at least one mapping relationship, to indicate at least one correspondence between a reporting quantity of spatial domain vectors and a reporting quantity of frequency domain vectors; and determining, by the terminal device, the reporting quantity of spatial domain vectors and the reporting quantity of frequency domain vectors based on the first mapping relationship.

Parameter configuration method and communications apparatus

This application relates to channel state information (CSI) feedback methods and devices. One method comprises: receiving, by a terminal device from a network device, indication information of a channel state information (CSI) reporting band; determining, by the terminal device, based on the indication information, a subset of subbands in a bandwidth part configured for the terminal device for CSI reporting; determining, by the terminal device, CSI reporting priorities of the subset of the subbands based on index numbers of the subset of the subbands, wherein the index numbers of the subset of the subbands are numbered in an ascending numerical order; and sending, by the terminal device to the network device, CSI of M subbands with higher CSI reporting priorities in the subset of the subbands compared to a remainder of subbands in the subset of subbands.

Channel state information feedback method, device, and system

Growing community of inventors

Shanghai, China

Huangping Jin