Huawei Technologies Co., Limited

Fujitsu Corporation

Baojin Li

Huangping Jin

Yongping Zhang

Xin Wang

Xiaohan Wang

Tie Li

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

This application provides a method for reporting a terminal device capability and a communications apparatus. The method includes: The terminal device generates first indication information and sends the first indication information to a network device. The first indication information is used to indicate one or more frequency domain parameters and one or more of the following capability parameters associated with each frequency domain parameter: a port quantity, a spatial domain parameter, a reference signal resource quantity, and a total port quantity. The frequency domain parameter is used to indicate a maximum quantity of frequency domain units that can be supported by the terminal device. The frequency domain unit is a frequency domain unit based on which the terminal device feeds back a PMI. Each capability parameter group may be used to indicate one combination of a plurality of parameters that can be supported by the terminal device.

Method for reporting terminal device capability and communications apparatus

The present invention provides a method and apparatus for determining an effective channel and feedback information. The method for determining an effective channel comprises: selecting more than one basic column vectors for determining a precoding matrix; calculating products of channel row vectors and the basic column vectors; and determining the effective channel or a Hermitian matrix of the effective channel by using the products. It can be seen from above that with the calculation of products of channel row vectors and more than one basic column vectors determining a precoding matrix and determination of an effective channel or Hermitian matrixes of the effective channel by using the products, the equipment is enabled to lower the amount of calculation and the complexity of calculation, lower the power consumption of the equipment and reduce the circuit size needed in performing corresponding processing in determining an effective channel or Hermitian matrixes of the effective channel and in determining channel feedback information.

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Beijing, China

Baojin Li