US6529482B1
Expired / Lapsed
US
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Method and apparatus for adjusting a signal-to-interference threshold in a closed loop power control communications system
Assignee: Qualcomm Inc
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Filing: 1999-06-30
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Granted: 2003-03-04
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Expires: 2019-06-30
Abstract
Abstract A method and apparatus for dynamically adjusting the signal-to-interference ratio (SIR) threshold used to control signal transmission power in closed loop communication systems. The closed loop power control comprises an inner loop that provides up/down transmission power control commands to a transmitter based upon a comparison of the SIR for a received signal to the threshold SIR. The outer loop dynamically adjusts the threshold SIR using historic inner loop power control information. When it is detected that the inner loop is not acceptably performing power control, the target SIR is not changed, or may increased or decreased more or less than 0.5 dB or 0.5 dB/99, respectively.
Inventors
- 👤 Stein A. Lundby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:47
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/06; H04W52/08; H04W52/18; H04W52/22; H04W52/221; H04W52/12; H04W52/24
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
98 words
An apparatus used to adjust a signal-to-interference ratio (SIR) threshold used in a closed loop power control system of a wireless communications network, said closed loop power control system having an inner loop and an outer loop, comprising: detection means for identifying typical inner loop power control command patterns, wherein said typical inner loop power control command patterns are indicative of said inner loop not correctly commanding that transmission power be changed; and outer loop power control means, communicatively coupled to said detection means, for adjusting an SIR threshold in accordance with said inner loop power control patterns.
Claim 2
Independent Claim
98 words
An apparatus used to adjust a signal-to-interference ratio (SIR) threshold used in a closed loop power control system of a wireless communications network, said closed loop power control system having an inner loop and an outer loop, comprising: detection means for identifying typical inner loop power control command patterns, wherein said typical inner loop power control command patterns are indicative of said inner loop not correctly commanding that transmission power be changed; and outer loop power control means, communicatively coupled to said detection means, for adjusting an SIR threshold in accordance with said inner loop power control patterns.
Claim 3
Dependent Claim
49 words
The apparatus recited in claim 1 , wherein said inner loop power control command pattern indicative of said inner loop not correctly commanding that transmission power be changed occurs when more than N number of successive power up commands are communicated to the detection means by the inner loop.
Claim 4
Dependent Claim
46 words
The apparatus recited in claim 1 , wherein said inner loop power control command pattern indicative of said inner loop not correctly commanding that transmission power be changed occurs when an estimated SIR for a last frame of information received is substantially below the SIR threshold.
Claim 5
Dependent Claim
47 words
The apparatus recited in claim 1 , wherein said outer loop control means receives said typical inner loop power control command patterns indicative of said inner loop not correctly commanding that transmission power be changed if a verification check of a last frame of information received fails.
Claim 6
Dependent Claim
17 words
The apparatus recited in claim 4 , wherein said verification check is a cyclic redundancy check (CRC).
Claim 7
Dependent Claim
46 words
The apparatus recited in claim 3 , wherein said outer loop adjusts said SIR threshold in accordance with said inner loop power control patterns and the number of up power commands, consecutive or non-consecutive, made by said inner loop during the last K number of commands.
Claim 8
Independent Claim
138 words
A method for adjusting a signal-to-interference ratio (SIR) threshold of a closed loop power control system used in a wireless communications network, said closed loop power control system having an inner loop and an outer loop, comprising the steps of: generating inner loop power control commands in accordance with a comparison between a first quality metric and a variable threshold; adjusting said variable threshold in accordance with said first quality metric unless a second quality metric indicates that said inner loop power control commands are not appropriate, and if said inner loop power commands are not appropriate, then either: (a) suspending the adjustment of said variable threshold, or (b) adjusting said variable threshold by an amount less than the amount the adjustment would have been if said adjustment had been made based only on said first quality metric.
Claim 9
Independent Claim
138 words
A method for adjusting a signal-to-interference ratio (SIR) threshold of a closed loop power control system used in a wireless communications network, said closed loop power control system having an inner loop and an outer loop, comprising the steps of: generating inner loop power control commands in accordance with a comparison between a first quality metric and a variable threshold; adjusting said variable threshold in accordance with said first quality metric unless a second quality metric indicates that said inner loop power control commands are not appropriate, and if said inner loop power commands are not appropriate, then either: (a) suspending the adjustment of said variable threshold, or (b) adjusting said variable threshold by an amount less than the amount the adjustment would have been if said adjustment had been made based only on said first quality metric.
Claim 10
Dependent Claim
36 words
The method recited in claim 7 , wherein said inner loop power control commands are not appropriate when more than N number of successive power up commands are communicated to the transmitter by the inner loop.
Claim 11
Dependent Claim
46 words
The method recited in claim 7 , wherein said adjustments to said variable threshold is made in accordance with said second quality metric and the number of up power control commands, consecutive or non-consecutive, made by said inner loop during the last K number of commands.
Claim 12
Dependent Claim
34 words
The method recited in claim 7 , wherein said inner loop power control commands are not appropriate when an estimated SIR for a last frame of information received is substantially below the variable threshold.
Claim 13
Dependent Claim
26 words
The method recited in claim 7 , wherein said second quality metric is used if a verification check of a last frame of information received fails.
Claim 14
Dependent Claim
17 words
The method recited in claim 11 , wherein said verification check is a cyclic redundancy check (CRC).
Claim 15
Independent Claim
82 words
A method for adjusting a signal-to-interference ratio (SIR) threshold used in a closed loop power control system of a wireless communications network, said closed loop power control system having an inner loop and an outer loop, comprising: identifying typical inner loop power control command patterns, wherein said typical inner loop power control command patterns are indicative of said inner loop not correctly commanding that transmission power be changed; and adjusting said SIR threshold in accordance with said inner loop power control patterns.
Claim 16
Independent Claim
82 words
A method for adjusting a signal-to-interference ratio (SIR) threshold used in a closed loop power control system of a wireless communications network, said closed loop power control system having an inner loop and an outer loop, comprising: identifying typical inner loop power control command patterns, wherein said typical inner loop power control command patterns are indicative of said inner loop not correctly commanding that transmission power be changed; and adjusting said SIR threshold in accordance with said inner loop power control patterns.
Claim 17
Dependent Claim
45 words
The method recited in claim 13 , wherein said inner loop power control command pattern indicative of said inner loop not correctly commanding that transmission power be changed occurs when more than N number of successive power up commands are communicated by the inner loop.
Claim 18
Dependent Claim
46 words
The method recited in claim 13 , wherein said inner loop power control command pattern indicative of said inner loop not correctly commanding that transmission power be changed occurs when an estimated SIR for a last frame of information received is substantially below the SIR threshold.
Claim 19
Dependent Claim
42 words
The method recited in claim 13 , further including receiving said inner loop power control command patterns indicative of said inner loop not correctly commanding that transmission power be changed if a verification check of a last frame of information received fails.
Claim 20
Dependent Claim
17 words
The method recited in claim 16 , wherein said verification check includes a cyclic redundancy check (CRC).
Claim 21
Dependent Claim
49 words
The method recited in claim 15 , wherein said adjusting said SIR threshold includes adjusting said SIR threshold in accordance with said inner loop power control patterns and a number of up power commands, consecutive or non-consecutive, made by said inner loop during the last K number of commands.
Claim 22
Independent Claim
84 words
A method for adjusting a signal-to-interference ratio (SIR) threshold of a closed loop power control system used a wireless communications network, said closed loop power control system having an inner loop and an outer loop, comprising: generating inner loop power control commands in accordance with a comparison between a first quality metric and a variable threshold; and adjusting said variable threshold in accordance with said first quality metric unless a second quality metric indicates that said inner loop power control commands are not appropriate.
Claim 23
Independent Claim
84 words
A method for adjusting a signal-to-interference ratio (SIR) threshold of a closed loop power control system used a wireless communications network, said closed loop power control system having an inner loop and an outer loop, comprising: generating inner loop power control commands in accordance with a comparison between a first quality metric and a variable threshold; and adjusting said variable threshold in accordance with said first quality metric unless a second quality metric indicates that said inner loop power control commands are not appropriate.
Claim 24
Dependent Claim
33 words
The method recited in claim 19 , wherein said inner loop power control commands are not appropriate when more than N number of successive power up commands are communicated by the inner loop.
Claim 25
Dependent Claim
34 words
The method recited in claim 19 , wherein said inner loop power control commands are not appropriate when an estimated SIR for a last frame of information received is substantially below the variable threshold.
Claim 26
Dependent Claim
26 words
The method recited in claim 19 , wherein said second quality metric is used if a verification check of a last frame of information received fails.
Claim 27
Dependent Claim
17 words
The method recited in claim 22 , wherein said verification check is a cyclic redundancy check (CRC).
Claim 28
Dependent Claim
140 words
A computer readable medium embodying a method for adjusting a signal-to-interference ratio (SIR) threshold of a closed loop power control system used a wireless communications network, said closed loop power control system having an inner loop and an outer loop, the method comprising: generating inner loop power control commands in accordance with a comparison between a first quality metric and a variable threshold; and adjusting said variable threshold in accordance with said first quality metric unless a second quality metric indicates that said inner loop power control commands are not appropriate, and if said inner loop power commands are not appropriate, then either: suspending the adjustment of said variable threshold, or adjusting said variable threshold by an amount less than the amount the adjustment would have been if said adjustment had been made based only on said first quality metric.
Claim 29
Dependent Claim
140 words
A computer readable medium embodying a method for adjusting a signal-to-interference ratio (SIR) threshold of a closed loop power control system used a wireless communications network, said closed loop power control system having an inner loop and an outer loop, the method comprising: generating inner loop power control commands in accordance with a comparison between a first quality metric and a variable threshold; and adjusting said variable threshold in accordance with said first quality metric unless a second quality metric indicates that said inner loop power control commands are not appropriate, and if said inner loop power commands are not appropriate, then either: suspending the adjustment of said variable threshold, or adjusting said variable threshold by an amount less than the amount the adjustment would have been if said adjustment had been made based only on said first quality metric.
Claim 30
Independent Claim
147 words
An apparatus for adjusting a signal-to-interference ratio (SIR) threshold of a closed loop power control system used a wireless communications network, said closed loop power control system having an inner loop and an outer loop, comprising: means for generating inner loop power control commands in accordance with a comparison between a first quality metric and a variable threshold; and means for adjusting said variable threshold in accordance with said first quality metric unless a second quality metric indicates that said inner loop power control commands are not appropriate, and if said inner loop power commands are not appropriate, then said means for adjusting further including either: means for suspending the adjustment of said variable threshold, or means for adjusting said variable threshold by an amount less than the amount the adjustment would have been if said adjustment had been made based only on said first quality metric.
Claim 31
Independent Claim
147 words
An apparatus for adjusting a signal-to-interference ratio (SIR) threshold of a closed loop power control system used a wireless communications network, said closed loop power control system having an inner loop and an outer loop, comprising: means for generating inner loop power control commands in accordance with a comparison between a first quality metric and a variable threshold; and means for adjusting said variable threshold in accordance with said first quality metric unless a second quality metric indicates that said inner loop power control commands are not appropriate, and if said inner loop power commands are not appropriate, then said means for adjusting further including either: means for suspending the adjustment of said variable threshold, or means for adjusting said variable threshold by an amount less than the amount the adjustment would have been if said adjustment had been made based only on said first quality metric.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-03-03 | 2006-09-02 | 2007-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-03-03 | 2010-09-02 | 2011-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-03-03 | 2014-09-02 | 2015-03-04 | $7700.00 | Window Closed / Lapsed |