Patent US6411799B1 successfully refreshed from Google Patents.
US6411799B1
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US
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Method and apparatus for providing ternary power control in a communication system
Assignee: Qualcomm Inc
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Filing: 1997-12-04
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Granted: 2002-06-25
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Expires: 2017-12-04
Abstract
Abstract A power control system for communication systems which utilizes a ternary signaling scheme to reduce or eliminate limit cycling which occurs as the result of using a binary signaling scheme is described. The power control values (each having one of three possible values) are not encoded and are punctured onto the data to improve the response time of the power control loop and allow for dynamic adjustment of the transmit power. The power up, power down, and do nothing commands are represented by positive, negative, and zero values (e.g., +1, −1, and 0), respectively. The remote station decreases its transmit power if any base station issues a power down command, maintains its transmit power if no base stations issue a power down command and at least one base station issues a do nothing command, and increases its transmit power if all base station issue power up commands.
Inventors
- 👤 Roberto Padovani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:46
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/30; H04W52/36; H04W52/367; H04W52/06; H04W52/12; H04W52/18; H04W52/24; H04W52/241; H04W52/54; H04W52/58; H04W52/38; H04W52/40
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
278 words
A method for controlling a transmit power in a communication system comprising the steps of: measuring a quality of a received signal; comparing said quality of said received signal against a set of set points, said set of set points comprising a first set point and a second set point; and generating a power control value in response to said comparing step; wherein said power control value comprises one of three values, said three values corresponding to a power up command, a power down command, and a do nothing command, and wherein said power control value corresponds to said power up command if said quality of said received signal is above said first set point, to said power down command if said quality of said received signal is below said second set point, and to said do nothing command if said quality of said received signal is between said first and second set points; transmitting said power control value to a destination station; and wherein said transmit power of said destination station is adjusted in accordance with a received power control value; processing a transmitted power control value at said destination station to provide said received power control value; wherein said processing step comprises the steps of: receiving at least one signal path corresponding to said transmitted power control value; demodulating each of said at least one signal path to obtain a pilot signal and a filtered data; computing a dot product of said pilot signal and said filtered data to obtain demodulated power control symbols; and accumulating said demodulated power control symbols over a period of said power control value to obtain said received power control value.
Claim 2
Independent Claim
278 words
A method for controlling a transmit power in a communication system comprising the steps of: measuring a quality of a received signal; comparing said quality of said received signal against a set of set points, said set of set points comprising a first set point and a second set point; and generating a power control value in response to said comparing step; wherein said power control value comprises one of three values, said three values corresponding to a power up command, a power down command, and a do nothing command, and wherein said power control value corresponds to said power up command if said quality of said received signal is above said first set point, to said power down command if said quality of said received signal is below said second set point, and to said do nothing command if said quality of said received signal is between said first and second set points; transmitting said power control value to a destination station; and wherein said transmit power of said destination station is adjusted in accordance with a received power control value; processing a transmitted power control value at said destination station to provide said received power control value; wherein said processing step comprises the steps of: receiving at least one signal path corresponding to said transmitted power control value; demodulating each of said at least one signal path to obtain a pilot signal and a filtered data; computing a dot product of said pilot signal and said filtered data to obtain demodulated power control symbols; and accumulating said demodulated power control symbols over a period of said power control value to obtain said received power control value.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein said quality of said received signal is based on a measured energy-per-bit-to-noise-plus-interference ratio E b /I o of said received signal.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein said set of set points is adjusted based on a performance requirement of said communication system.
Claim 5
Dependent Claim
18 words
The method of claim 3 wherein said performance requirement is based on a frame-error-rate of said received signal.
Claim 6
Dependent Claim
19 words
The method of claim 4 wherein said first set point is decreased if said frame-error-rate is higher than required.
Claim 7
Dependent Claim
19 words
The method of claim 4 wherein said second set point is increased if said frame-error-rate is lower than necessary.
Claim 8
Dependent Claim
26 words
The method of claim 1 wherein said first and second set points are set based on a measurement uncertainty of said quality of said received signal.
Claim 9
Dependent Claim
32 words
The method of claim 7 wherein a difference between said first and second set points is set equal to or greater than said measurement uncertainty of said quality of said received signal.
Claim 10
Dependent Claim
33 words
The method of claim 1 wherein said processing step further comprises the step of: comparing an output from said accumulating step against a set of thresholds to obtain said received power control value.
Claim 11
Dependent Claim
13 words
The method of claim 1 wherein said power control value is not encoded.
Claim 12
Dependent Claim
16 words
The method of claim 1 wherein said power control value is punctured onto a data transmission.
Claim 13
Dependent Claim
18 words
The method of claim 1 wherein said power control value is pseudo-randomly positioned within a power control group.
Claim 14
Independent Claim
243 words
A method for adjusting a transmit power in a communication system comprising the steps of: receiving at least one transmitted power control value; processing said at least one transmitted power control value to obtain a power control command; and adjusting said transmit power in accordance with said power control command; wherein said power control command comprises one of three values, said three values corresponding to a power up command, a power down command, and a do nothing command, and wherein said power control value corresponds to said power up command if a quality of a received signal at a base station transmitting said power control value is above a first set point, to said power down command if said quality of said received signal at said base station transmitting said power control values is below a second set point, and to said do nothing command if said quality of said received signal at said base station transmitting said power control value is between said first and second set points; receiving at least one signal path corresponding to said at least one transmitted power control value; demodulating each of said at least one signal path to obtain demodulated power control symbols; accumulating said demodulated power control symbols over a period of said transmitted power control value; combining identical power control values from said accumulating step to obtain independent power control values; logically combining said independent power control values to obtain said power control command.
Claim 15
Independent Claim
243 words
A method for adjusting a transmit power in a communication system comprising the steps of: receiving at least one transmitted power control value; processing said at least one transmitted power control value to obtain a power control command; and adjusting said transmit power in accordance with said power control command; wherein said power control command comprises one of three values, said three values corresponding to a power up command, a power down command, and a do nothing command, and wherein said power control value corresponds to said power up command if a quality of a received signal at a base station transmitting said power control value is above a first set point, to said power down command if said quality of said received signal at said base station transmitting said power control values is below a second set point, and to said do nothing command if said quality of said received signal at said base station transmitting said power control value is between said first and second set points; receiving at least one signal path corresponding to said at least one transmitted power control value; demodulating each of said at least one signal path to obtain demodulated power control symbols; accumulating said demodulated power control symbols over a period of said transmitted power control value; combining identical power control values from said accumulating step to obtain independent power control values; logically combining said independent power control values to obtain said power control command.
Claim 16
Dependent Claim
50 words
The method of claim 13 wherein said processing step further comprises the step of: comparing independent power control values against corresponding sets of thresholds to obtain received power control values; and wherein said logically combining step is performed on said received power control values to obtain said power control command.
Claim 17
Dependent Claim
25 words
The method of claim 13 wherein said transmit power is adjusted upward if at least one independent power control value is a power down command.
Claim 18
Dependent Claim
34 words
The method of claim 13 wherein said transmit power is maintained if no independent power control values are power down command and at least one independent power control value is a do nothing command.
Claim 19
Dependent Claim
21 words
The method of claim 13 wherein said transmit power is increased if all independent power control values are power up commands.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2005-06-24 | 2005-12-24 | 2006-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-06-24 | 2009-12-24 | 2010-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-06-24 | 2013-12-24 | 2014-06-25 | $7700.00 | Window Closed / Lapsed |