Huawei Technologies Co., Limited

Xiaohan Wang

Huangping Jin

Xiaoyan Bi

Shibin Ge

Haicun Hang

Liuliu Ji

Xiang Ren

Wei Han

Yiling Yuan

Min Zhang

Hua Xu

Xiang Gao

Li Fan

Hongzhe Shi

Yongping Zhang

Peng Shang

Yong Liu

Ye Wu

Haifan Yin

Baojin Li

Zhimeng Zhong

Shengwu Huang

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

Example communication processing methods and apparatus are described. One method includes receiving M groups of first parameters and N groups of second parameters that are sent by a network device, where each first parameter is a a control resource set (CORESET) group, each second parameter is a cell-specific reference signal (CRS) rate matching parameter, M is equal to N, and both M and N are positive integer greater than or equal to 2. There is an association relationship between each group of first parameters and each group of second parameters. Terminal devices may determine a punctured time-frequency resource on a physical downlink shared channel (PDSCH) based on CRS rate matching parameters determined by the terminal devices to obtain downlink data.

Communication processing 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

Embodiments of this application disclose a resource configuration method, apparatus, and system. A network device sends, to a terminal device, resource configuration information of a demodulation reference signal (DMRS) resource that meets a predetermined rule. The terminal device receives the resource configuration information of a DMRS, where the received resource configuration information includes two or more groups of resource configuration information, and the DMRS is used for demodulating a physical data channel. In the two or more groups of resource configuration information, a DMRS resource configured by any group of resource configuration information does not intersect with a physical data channel resource corresponding to another group of resource configuration information.

Resource configuration method and apparatus, and system

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 the present disclosure provide a precoding matrix indication method, user equipment, and an access device. The precoding matrix indication method includes: generating indication information, where the indication information indicates K−v non-zero weighting coefficients, the K−v non-zero weighting coefficients belong to Knon-zero weighting coefficients, v is a quantity of transport layers, the Knon-zero weighting coefficients are for constructing a precoding matrix, and the precoding matrix is constructed based on at least the Knon-zero weighting coefficients, m spatial domain vectors, and n frequency domain vectors, where the indication information is generated in a first manner when a first preset condition is met, or the indication information is generated in a second manner when a second preset condition is met; and sending the indication information.

Precoding matrix indication method, user equipment, and access device

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

This application provides a multi-downlink control information (DCI)-based transmission method. In the method, a terminal reports information about a capability of the terminal to support multi-DCI transmission, or a network device sends indication information of the types or the quantity of multi-DCI-based transmissions to a terminal. The network device performs resource scheduling on the terminal on this basis, thereby helping improve resource scheduling efficiency and reduce processing complexity of the terminal. In addition, this application also provides a corresponding solution for a scenario in which a carrier aggregation/dual connectivity (CA/DC) DCI-based transmission scenario coexists with multi-DCI (DCI)-based transmission, thereby helping the terminal share a multi-DCI DCI-based transmission capability and a CA/DC (DCI)-based transmission capability to improve a processing capability of the terminal.

Multi-downlink control information based transmission method, device, system, and storage medium

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 describes a channel information feedback method and a communication apparatus. The method includes a terminal device that receives configuration information sent by a network device, where the configuration information is used to configure a feedback mode of channel information. The terminal device may feed back current channel information to the network device when the feedback mode configured by using the configuration information is a first mode. The terminal device may alternatively feeds back predicted channel information to the network device when the feedback mode configured by using the configuration information is a second mode. System performance is therefore improved by the method described in this application because channel information feedback requirements in different scenarios can be met. In particular, a problem that data transmission performance deteriorates because channel information expires in a moving scenario can be resolved by feeding back the predicted channel information.

Channel information feedback method and communication apparatus

A channel state information feedback method includes: a terminal receives first indication information from a network device, and the terminal sends channel state information to the network device. The first indication information is used to indicate a type of a right multiplication matrix in a first codebook, and the first codebook satisfies a formula (I). W is the first codebook, Wis a port selection matrix, (II) is a linear superposition coefficient matrix, Wis the right multiplication matrix, and (III) is a conjugate transpose of W, and is used by the terminal to determine the channel state information based on the first codebook. According to the method, when there are a plurality of codebooks, the codebook used by the terminal to obtain the CSI can be clearly indicated.

Channel state information feedback method and communications apparatus

This disclosure provides methods and apparatuses for precoding in wireless communications. In an implementation, a method includes: receiving, from a terminal device, first indication information, wherein the first indication information indicates Lspace domain vectors in a space domain vector set, Kfrequency domain vectors in a frequency domain vector set, and Tspace-frequency component matrices, wherein a precoding vector of one or more frequency domain units is determined by a weighted sum of the Tspace-frequency component matrices, wherein the Lspace domain vectors and the Kfrequency domain vectors correspond to Mspace-frequency component matrices that comprise the Tspace-frequency component matrices, and determining the precoding vector of the one or more frequency domain units based on the first indication information.

Growing community of inventors

Shanghai, China

Xiaohan Wang