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CART CLUSTER DETECTION AND ESTIMATION

  • US 20080316029A1
  • Filed: 08/28/2008
  • Published: 12/25/2008
  • Est. Priority Date: 03/18/2005
  • Status: Active Grant
First Claim
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1. A method of estimating a number of carts clustered together in an area that comprises a plurality of carts, the method comprising:

  • causing each of the plurality of carts to generate a radio frequency (RF) transmission;

    at each respective cart, generating RSSI (Received Signal Strength Indication) values for the transmissions received from the other carts; and

    collectively analyzing the RSSI values generated at the carts to estimate how many of the carts are clustered together.

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