Datang Mobile Communications Equipment Co., Ltd.

Zhengxuan Liu

Qiubin Gao

Hui Li

Runhua Chen

Disclosed are a channel reciprocity-based precoding matrix configuration method and apparatus. The method includes in downlink transmission, a network side separately sends, on each antenna port associated with each transmission layer, a CSI-RS subjected to beamforming to a terminal by using beams calculated according to angle information and delay information determined on the basis of uplink channel state information, and determines a precoding matrix for downlink transmission of the terminal according to beams sent on K0 antenna ports selected by the terminal on the basis of the CSI-RS, and a beam combination coefficient set.

Channel reciprocity-based precoding matrix configuration method and apparatus

The present disclosure provides a channel state information reporting method, a channel state information receiving method, a terminal, and a network side device. The reporting method includes: receiving codebook parameter information sent by a network side device; determining an enhanced Type II codebook structure according to the codebook parameter information; determining non-zero coefficient indication information according to the enhanced Type II codebook structure, the non-zero coefficient indication information is used to indicate non-zero coefficient related information in a combined coefficient matrix in the enhanced Type II codebook structure; sending the non-zero coefficient indication information to the network side device.

Channel state information reporting method, receiving method, terminal, and network side device

The embodiments of the present application provide an antenna port indication method, a terminal and a network-side device. Said method includes: transmitting a port indication message to a network-side device; and the port indication message carries at least any one of the following port indication information: bitmap information or combination coefficient information for indicating ports selected by a terminal; a first parameter for indicating the ports selected by the terminal; or a second parameter for indicating ports selected by the terminal in a first polarization direction and a third parameter for indicating the ports selected by the terminal in a second polarization direction. The embodiments of the present application achieve the indication of ports selected by a terminal.

Antenna port indication method, terminal and network-side device

Disclosed in the present application are methods for sending and receiving channel state information (CSI), a terminal device and a network device, which are used to provide a CSI sending method or receiving method on the basis of a Rel-16 codebook structure. The method for sending CSI includes determining a compressed basis vector in a precoding matrix, the compressed basis vector belonging to a set of candidate basis vectors, and the compressed basis vector weighted by coefficients of the precoding matrix is used to construct frequency domain characteristics of the precoding matrix; and sending the CSI to a network device, and the CSI includes basis vector indication information, and the basis vector indication information is used to indicate the compressed basis vector.

Methods for sending and receiving channel state information, terminal device and network device

Provided are a method and a device for channel state information, terminal, and network side, and a storage medium. The method includes: receiving beamformed CSI-RSs, or the beamformed CSI-RSs and frequency domain basis vector indication information transmitted by a network side by means of antenna ports, where beams used in beamforming are determined based on spatial domain basis vectors or based on the spatial domain basis vectors and frequency domain basis vectors, and the spatial domain basis vectors and the frequency domain basis vectors are determined based on an uplink channel; determining port indication information and a port combination coefficient for data transmission based on the beamformed CSI-RS or the beamformed CSI-RS and the frequency domain basis vector indication information; and feeding back the port indication information and port combination coefficient to the network side for determining precoding of downlink transmission data at the network side.

Channel state information feedback method, device, terminal, and network side, and storage medium

Disclosed are a channel state information reporting method and device, relating to the field of wireless communications and used for solving the problem of no corresponding CSI reporting method being provided at present regarding a Rel-16 codebook structure. The method of the present application includes a terminal determining, according to codebook parameter information, codebook indication information corresponding to a data transmission layer; and the terminal sending channel state information (CSI) including the codebook indication information to a network side device, and the codebook indication information includes a part or all of the following: beam information for determining a precoding matrix orthogonal combination beam, base vector information for determining a precoding matrix compression base vector, and nonzero coefficient indication information for determining a precoding matrix compression coefficient.

Channel state information reporting method and device

A channel state information (CSI) feedback method and device are disclosed. In the method, a terminal determines an orthogonal beam group and pre-coding matrix information according to codebook parameter information, where a same beam in the orthogonal beam group has same specified coefficients in first and second polarization directions, each of the specified coefficients comprises an amplitude coefficient and/or a phase coefficient; the pre-coding matrix information includes the specified coefficients and adjustment factors, and the adjustment factors are used together with the specified coefficients to determine linear combination coefficients except the specified coefficients in a linear combination coefficient set; and the pre-coding matrix information is sent to a network-side device.

Channel state information feedback method and device

Disclosed are a channel reciprocity-based precoding matrix configuration method and apparatus. The method includes: in downlink transmission, a network side separately sends, on each antenna port associated with each transmission layer, a CSI-RS subjected to beamforming to a terminal by using beams calculated according to angle information and delay information determined on the basis of uplink channel state information, and determines a precoding matrix for downlink transmission of the terminal according to beams sent on K0 antenna ports selected by the terminal on the basis of the CSI-RS, and a beam combination coefficient set.

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Beijing, China

Zhengxuan Liu