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Wireless local area network with spatial diagnostics

  • US 9,807,635 B2
  • Filed: 05/30/2015
  • Issued: 10/31/2017
  • Est. Priority Date: 10/31/2014
  • Status: Active Grant
First Claim
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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 wherein the channel soundings include at least one of;

    an explicit channel sounding, an implicit channel sounding and an unsolicited channel sounding; 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 human activity relative to at least an identified one of the station nodes based on perturbations over time in the CSI history of an associated communication link with the WAP node.

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