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Adaptive frequency planning in a cellular network

  • US 6,253,086 B1
  • Filed: 03/25/1999
  • Issued: 06/26/2001
  • Est. Priority Date: 09/27/1996
  • Status: Expired due to Term
First Claim
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1. Method of selecting radio frequencies for a tuning base station in a cellular network comprising:

  • establishing a set of transmission frequencies and a set of reception frequencies for a plurality of base stations and where during the traffic connection between a base station and a mobile station, the base station receives at the allocated reception frequency and transmits at the allocated transmission frequency and the mobile station carries out routine measurements of quality of the connection and sends a measure report to the network, wherein choosing the set of transmission frequencies for use at the tuning base station comprises;

    transmitting a tuning signal from the tuning base station at at least a part of the transmission frequencies used in the network so that the tuning signal is transmitted several times, without regard to time slots, at each transmission frequency for determining an average interference effect, observing an interference effect caused by the tuning signal in the routine measurements by at least one mobile station, with which a base station of some other cell is in connection at the same transmission frequency at which the tuning signal is transmitted, calculating an average interference effect of interference effects, and choosing a desired number of frequencies, at which the average interference effect caused in traffic connections in other cells is acceptably low, to be the set of transmission frequencies.

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