| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide techniques for quickly sending feedback information for beamforming. <P>SOLUTION: A transmitter sends a first frame comprising training symbols. A receiver receives the first frame, determines the amount of time to generate feedback information, and determines the amount of time to send the feedback information. The receiver then determines the length of a second frame based on the amount of time to generate and send the feedback information. The receiver sends the second frame after waiting a short interframe space (SIFS) period from the end of the first frame, without performing channel access. The receiver generates the feedback information based on the training symbols and sends the information in the second frame when ready. The transmitter receives the second frame, derives at least one steering matrix based on the feedback information, and sends a third frame with the at least one steering matrix. <P>COPYRIGHT: (C)2013,JPO&INPIT |
