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Method for determining when a communication device should rate shift or roam in a wireless environment

  • US 6,791,959 B1
  • Filed: 06/29/1999
  • Issued: 09/14/2004
  • Est. Priority Date: 04/12/1999
  • Status: Expired due to Term
First Claim
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1. A method of improving communication performance in a wireless communication system, said wireless communication system having at least one mobile wireless communication device and a plurality of transmitter/receiver sites that communicate with communication signals, each of which has a geographic area, defined as a cell, within which said at least one mobile wireless communication device can communicate with at least one of said transmitter/receiver sites, said method of improving communication performance comprising the steps off:

  • receiving at one of the transmitter/receiver sites the communication signals transmitted by the communication device;

    evaluating over time intervals the quality of the communication signals received from the mobile wireless communication device to obtain measurement values of the quality of the evaluated communication signals;

    creating a functional relationship value based on the measurement values and a configurable parameter associated with the measurement values;

    storing the functional relationship value in a memory;

    calculating an extrapolated functional relationship value based on a stored functional relationship value; and

    determining an optimal one of said plurality of transmitter/receiver sites for communication with said wireless communication device based on the extrapolated functional relationship value.

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