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EP1087541A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Apparatus and method for controlling the transmission power of the forward link of a wireless communication system

Assignee: Nokia of America Corp
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Filing: 2000-09-04
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Granted: —
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Expires: 2020-09-04
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Abstract

Abstract A method that adjusts the power level of a set of forward-link signals of a base station responsive to the loading of the forward link as determined by a power level measurement of the signal set. One power level measurement is a pilot fraction of the forward link. Other power level measurements, such as the signal set's power level, can be used, alone or in combination, instead of or in addition to the pilot fraction of the forward link to adjust the power level of the signal set. The power level of the signal set can be changed in any manner, including by scaling it by a scaling factor, or by increasing the power level by a fixed or a variable amount. The power level measurement of the signal set is obtained during a current time period. The scaling factor that will be used in the subsequent time period is determined using the power level measurement. In one embodiment of the invention, the scaling factor can be obtained from a look-up table that is based on the power level measurement. If the cell containing the base station includes several sectors, the power level of the signal set in a sector is adjusted when the power level measurement in that sector indicates that the power level should be adjusted.

Inventors

  • 👤 Edward Ellis Eibling
  • 👤 Raafat Edward Kamel
  • 👤 Wen-Yi Kuo
  • 👤 Mathew Thomas
  • 👤 Carl Francis Weaver

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 14:32
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/18; H04W52/22; H04W52/226; H04W52/06; H04W52/14; H04W52/143

Claims Analysis

Total Claims: 14
Claim 1
Independent Claim 64 words
A method for controlling a power level of signals transmitted by a base station (200) in a wireless system, the base station (200) having a signal set of forward link signals, the method CHARACTERIZED BY the steps of: obtaining a power level measurement of the forward link signal set; and adjusting the power level of the signal set responsive to the power level measurement.
Claim 2
Dependent Claim 16 words
The method of claim 1, CHARACTERIZED IN THAT the power level measurement is a pilot fraction.
Claim 3
Dependent Claim 18 words
The method of claim 1, CHARACTERIZED IN THAT the power level measurement is the signal set's power level.
Claim 4
Dependent Claim 24 words
The method of claim 1, CHARACTERIZED IN THAT the signal set comprises all signals in a sector of a cell containing the base station.
Claim 5
Dependent Claim 73 words
The method of claim 1, CHARACTERIZED IN THAT: the obtaining step comprises: obtaining a power level (P[n]) of the signal set for a time period; obtaining a power level of the pilot for the time period; and determining a pilot fraction (PF[n])for the time period; the adjusting step comprises: determining a scaling factor based on a the pilot fraction (PF[n]); and scaling the power level of the signal set using the scaling factor.
Claim 6
Dependent Claim 111 words
The method of claim 5, CHARACTERIZED IN THAT a cell containing the base station (200) comprises a plurality of sectors, each corresponding to at least one signal set and wherein: the step of obtaining the power level of the signal set comprises obtaining a power level for each signal set for the time period; the step of determining the pilot fraction comprises determining a pilot fraction for each signal set for the time period; the step of determining the scaling factor comprises determining a scaling factor for each signal set; and the scaling step comprises scaling the power level of each signal set using the scaling factor determined for that set.
Claim 7
Dependent Claim 76 words
The method of claim 1, CHARACTERIZED IN THAT: the obtaining step comprises: obtaining a power level (P[n]) of the signal set for a time period; obtaining a power level of the pilot for the time period; and determining an average pilot fraction (avPF[n]) for the time period; the adjusting step comprises: determining a scaling factor based on a the average pilot fraction (avPF[n]); and scaling the power level of the signal set using the scaling factor.
Claim 8
Dependent Claim 48 words
The method of claim 7, CHARACTERIZED IN THAT the average pilot fraction (avPF[n]) for the time period is based on a ratio of the pilot's power level to the signal set's power level for the time period, and an average pilot fraction (avPF[n-1]) for a previous time period.
Claim 9
Independent Claim 33 words
The method of claims 5 and 7, CHARACTERIZED IN THAT determining the scaling factor comprises looking up the scaling factor in a look-up table that relates the pilot fraction to the scaling factor.
Claim 10
Independent Claim 16 words
The method of claims 5 and 7, CHARACTERIZED IN THAT the time period comprises a frame.
Claim 11
Independent Claim 18 words
The method of claims 5 and 7, CHARACTERIZED IN THAT the time period comprises a plurality of frames.
Claim 12
Independent Claim 31 words
The method of claims 5 and 7, CHARACTERIZED IN THAT the scaling step comprises scaling the power level of the signal set during a subsequent time period using the scaling factor.
Claim 13
Independent Claim 30 words
The method of claims 5 and 7, CHARACTERIZED IN THAT the scaling step comprises scaling the power level of the signal set during the time period using the scaling factor.
Claim 14
Dependent Claim 113 words
The method of claim 7, CHARACTERIZED IN THAT a cell containing the base station (200) comprises a plurality of sectors, each corresponding to at least one signal set and wherein: the step of obtaining the power level of the signal set comprises obtaining a power level for each signal set for the time period; the step of determining the average pilot fraction comprises determining an average pilot fraction for each signal set for the time period; the step of determining the scaling factor comprises determining a scaling factor for each signal set; and the scaling step comprises scaling the power level of each signal set using the scaling factor determined for that set.

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