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Handover method based upon channel quality

  • US 5,649,290 A
  • Filed: 12/14/1994
  • Issued: 07/15/1997
  • Est. Priority Date: 12/14/1994
  • Status: Expired due to Term
First Claim
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1. A method for handing over an ongoing radio transmission of a mobile terminal traveling within a cellular network, said network having a plurality of adjoining cells each having a base station, and a multiplicity of channels, comprising the steps of:

  • handing over the ongoing radio transmission of a mobile terminal traveling in one of said plurality of cells to an idle channel in a target adjacent cell, said handing over including;

    (i) determining whether to commence a handover in dependence upon at least a baseband noise power level measured by the base station in said one cell; and

    (ii) selecting said target adjacent cell based upon a measurement of the baseband noise power of a supervisory audio tone (SAT) signal superimposed on a voice signal received by ones of a plurality of baseband signal processing units each associated with one of said base stations in the cellular network.

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