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Location of wireless nodes using signal strength weighting metric

  • US 20050208952A1
  • Filed: 03/16/2004
  • Published: 09/22/2005
  • Est. Priority Date: 03/16/2004
  • Status: Active Grant
First Claim
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1. A method for estimating the location of a wireless node relative to a plurality of radio receivers operative to detect the strength of RF signals, wherein a RF coverage map, corresponding to each of the radio receivers, characterizes the signal strength values for locations in a physical region, comprising collecting signal strength values, detected at a plurality of radio receivers, corresponding to signals transmitted by a wireless node;

  • computing the estimated location of the wireless node based on the collected signal strength values and the RF coverage maps corresponding to the plurality of radio receivers, wherein the contribution of each detected signal strength value to the estimated location is weighted according to a weighting function that varies with the signal strength values detected by the radio receivers.

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