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PORTAL ACCESS CONTROL SYSTEM

  • US 20100265034A1
  • Filed: 04/04/2008
  • Published: 10/21/2010
  • Est. Priority Date: 04/05/2007
  • Status: Abandoned Application
First Claim
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1. A method of automatically operating a portal by determining the intention of an approaching or receding carrier by providing a portable communication device for said carrier and a control (base) unit associated with the control system for said portal in which the antenna transmission and reception areas between specific events are varied either synchronously or independently to determine change in proximity between the control unit and the carrier as an indication of intent to open or close the portal.

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