US Patent No. 9,078,153

WIRELESS LOCAL AREA NETWORK WITH SPATIAL DIAGNOSTICS


Patent No. 9,078,153
Issue Date July 07, 2015
Title Wireless Local Area Network With Spatial Diagnostics
Inventorship Sigurd Schelstraete, Menlo Park, CA (US)
Hossein Dehghan, Diablo, CA (US)
Sam Heidari, Los Altos Hills, CA (US)
Bahador Amiri, Los Gatos, CA (US)
Assignee Quantenna Communications, Inc., Fremont, CA (US)

Claim of US Patent No. 9,078,153

1. A diagnostic system for spatial diagnosis of a wireless local area network (WLAN), and the diagnostic system comprising:
a sounding aggregator configured to aggregate multiple-input multiple-output (MIMO) channel state information (CSI) from channel
soundings of each communication link on the WLAN between a wireless access point (WAP) node thereof and associated station
nodes and to retain a history of the CSI on each link after normal use in WLAN communications, whereby the history includes
CSI from prior channel soundings of each communication link; and

a spatial correlator coupled to the sounding aggregator and configured to correlate the CSI history from each link's prior
channel soundings with spatial characteristics of the WLAN including an identification of a displacement and a change in throughput
before and after displacement of an identified one of the WLAN station nodes based on perturbations over time in the CSI history
of an associated communication link with the WAP node.