Automated tool method for frequency plan revision within a cellular telephone system

Patent 6212386 Issued on April 3, 2001. Estimated Expiration Date:

June 30, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Assignee

Telefonaktiebolaget LM Ericsson

Application

No. 108523 filed on 06/30/1998

US Classes:

455/447, Frequency reuse scheme455/62, Optimum frequency selection455/452.2Based on service quality (e.g., bandwidth, etc.)

Examiners

Primary: Vo, Nguyen

Attorney, Agent or Firm

Jenkens & Gilchrist

Foreign Patent References

42 42 808 DE. 06/12/1994
43 03 999 A1 DE. 08/12/1994
0 847 213 A2 EP. 06/12/1998
WO 94/06220 WO. 03/12/1994
WO 95/34957 WO. 12/12/1995
WO 96/06512 WO. 02/12/1996
WO 96/17485 WO. 06/12/1996
WO 96/31990 WO. 10/12/1996
WO 96/31991 WO. 10/12/1996
WO 97/01256 WO. 01/12/1997

International Class

H04Q 007/20

Abstract

Interference and bit error rate measurements are made on the uplink and downlink to determine communications quality. Mobile station mobile assisted hand-off (MAHO) functionality is utilized to make the downlink measurements. Following filtering, the measurements are evaluated to identify potential candidates for reallocation. In one type of evaluation, when measured downlink bit error rate on a selected frequency is lower than a threshold and is worse than measured uplink bit error rate, then a better quality candidate is chosen to replace the selected frequency. In another type of evaluation, when a best available candidate has better interference than a worst quality one of the selected frequencies, that best candidate is chosen to replace the selected frequency.