COLLISION DETECTION AND BACKOFF WINDOW ADAPTATION FOR MULTIUSER MIMO TRANSMISSION Russian patent published in 2014 - IPC H04W74/08 

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to a wireless local area network (WLAN) where an access point (AP) has data to send to multiple stations (STA). The technical result of the invention is the capacity to detect collisions during multiuser multiple-input multiple-output (MU-MIMO) transmission and adapting a contention window (CW) size for a backoff counter applied to a subsequent MU-MIMO transmission.

EFFECT: by using a downlink spatial division multiple access (DL-SDMA) technique, the AP may send data at the same time to multiple STA.

50 cl, 9 dwg