METHOD AND SYSTEM FOR PROVIDING BEAMFORMING FEEDBACK IN WIRELESS COMMUNICATION SYSTEMS Russian patent published in 2011 - IPC H04L12/28 

FIELD: information technology.

SUBSTANCE: transmitter/initiator sends a first frame comprising training symbols. A receiver/responder 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 carrying the feedback information based on the amount of time to generate and send the feedback information. The receiver sends the second frame after waiting a short inter-frame 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 using at least one steering matrix.

EFFECT: sending beamforming feedback information with as short delay time as possible.

42 cl, 10 dwg