A method in the embodiments of the present invention includes: sending, by a first device, a first beam to a target terminal; sending, by a second device, a second beam to the target terminal; measuring, by the target terminal, the received first beam and second beam; and if a first measurement quantity and a second measurement quantity meet a preset condition, sending, by the target terminal, a notification message to the first device, to instruct the first device to perform transmission coordination with the second device, so that the second device adjusts the second beam to reduce interference from the second beam to the first beam.