Communication method and apparatus

A method, comprising:

• sending first information to a network device, wherein the first information comprises information about a first location and a movement speed of a terminal device, the first location is a location of the terminal device, and the first information is for predicting a second location at which the terminal device performs channel estimation;
• receiving a first channel covariance matrix from the network device, wherein the first channel covariance matrix is a channel covariance matrix of a downlink channel corresponding to the second location;
• and
• determining, based on the first channel covariance matrix, downlink channel state information corresponding to the second location.

An apparatus, comprising:

• at least one processor coupled to one or more memories storing programming instructions that are executable by the at least one processor to perform operations comprising:
• sending first information to a network device, wherein the first information comprises information about a first location and a movement speed of a terminal device, the first location is a location of the terminal device, and the first information is for predicting a second location at which the terminal device performs channel estimation;
• receiving a first channel covariance matrix from the network device, wherein the first channel covariance matrix is a channel covariance matrix of a downlink channel corresponding to the second location;
• and
• determining, based on the first channel covariance matrix, downlink channel state information corresponding to the second location.