Huawei Technologies Co., Limited

Shijie Cai

Kunpeng Liu

Yongxing Zhou

Xueru Li

An information transmission method and apparatus. In the method, a terminal device generates a first codeword, where the first codeword is obtained based on a second codeword, a quantity of elements included in the second codeword is greater than a quantity of elements included in the first codeword, the second codeword is associated with a first coefficient set of a downlink channel, and the first coefficient set includes an element included in at least one row vector or column vector of a first coefficient matrix; and then the terminal device feeds back the first codeword to a network device. The terminal device can indicate a position and a numerical value of an element in the first coefficient set by reporting only the first codeword. This manner is simple. In addition, a codeword length of the first codeword is shorter than a codeword length of the second codeword.

Information transmission method and apparatus

This application provides channel state information reporting methods and communications apparatuses. One method includes: generating first indication information and a plurality of groups of second indication information, where the first indication information indicates a plurality of frequency domain component vectors, each group in the plurality of groups of second indication information corresponds to a spatial layer and a plurality of spatial domain component vectors and constructs precoding vectors of the spatial layer in a plurality of frequency bands, and each piece of second indication information in each group corresponds to a spatial domain component vector in the plurality of spatial domain component vectors and indicates at least one of the plurality of frequency domain component vectors that corresponds to the spatial domain component vector; and sending the first indication information and the second indication information.

Channel state information reporting method and communications apparatus

This application provides a communication method and an apparatus, so that a terminal device and a network device can determine, based on a frequency domain position of each resource element in a second resource element set, a transmit sequence of each uplink transmit port on the second resource element set, to send and receive an uplink reference signal on a non-uniform pilot resource.

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Beijing, China

Shijie Cai