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Mobile station handover for base stations with adaptive antenna system

  • US 7,945,263 B2
  • Filed: 11/29/2005
  • Issued: 05/17/2011
  • Est. Priority Date: 11/29/2005
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • receiving, at a second base transceiver station, an access burst from a mobile station with a call already in progress with a first base transceiver station, and requesting service from said second base transceiver station;

    electronically steering a beam of an adaptive antenna array of said second base transceiver station toward a location of said mobile station based on said access burst, wherein said beam of said adaptive antenna array exhibits gain in a first direction of said mobile station, and wherein said second base transceiver station creates an antenna pattern comprising nulls in a second direction of a second mobile station operating on a common RF carrier frequency;

    receiving a predetermined number of additional access bursts by said second base transceiver station; and

    determining, at said second base transceiver station, a set of weighting parameters based on said additional access bursts, wherein said set of weighting parameters is configured to produce said antenna pattern for said adaptive array.

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