Patent ID: 9444138
Filing Date: 2016-09-13
CPC Classification: H01Q,H04B,H04L

Claim Text:
1. A method for transmitting to static and non-static devices, the method comprising: sending, by an access point having a plurality of antennas, a first sounding frame and a second sounding frame from the plurality of antennas to a plurality of devices; receiving, by the access point at a first time, a first response to the first sounding frame from a first device; receiving, by the access point at a second, different time, a second response to the second sounding frame from the first device; detecting, by the access point, a change between channel characteristics of the first response and channel characteristics of the second response; identifying, by the access point, the first device as static responsive to the detected change between channel characteristics of the first response and channel characteristics of the second response; and configuring, by the access point responsive to the identification of the first device as static, to beamform to the first device using one or both of (i) one of the plurality of antennas for operation in a directional mode for transmission to the first device, or (ii) multiple antennas of the plurality of antennas for coherent transmission to the first device.