METHOD, DEVICE AND SYSTEM FOR TRANSMITTING CHANNEL INFORMATION

摘要

Disclosed is a method for transmitting channel information in the field of wireless communications. The method comprises: a beamformer sending a request for obtaining channel information to a beamformee within the time length of a current first transmit opportunity (TXOP); receiving a null feedback frame from the beamformee within the time length of the first TXOP; within the validity period of the channel information, if the beamformer obtains a second TXOP, sending a channel information indicating frame within the second TXOP to request the channel information and receiving the channel information sent from the beamformee. Also disclosed are a device and system for transmitting channel information, the system comprises a beamformer and a beamformee. In the present invention, the signaling resources of the beamformer and the power overhead of the beamformee are saved.