US5778030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for power control in a communication system
Assignee: Google Technology Holdings LLC
•
Filing: 1996-03-15
•
Granted: 1998-07-07
•
Expires: 2016-03-15
Abstract
Abstract Power control in a spread spectrum communication system takes place by determining a speed of a remote unit (405) and assigning as a power-control threshold a target threshold based on the determined speed (410). An instantaneous threshold value is created (415) based on frame-quality information and the target threshold. An energy of a power-control group transmitted (430) from a remote unit is compared to the instantaneous threshold value and a power-adjustment command is determined. The power-adjustment command is transmitted to the remote unit instructing the remote unit to adjust its power accordingly.
Inventors
- 👤 Eugene J. Bruckert
- 👤 Thomas A. Sexton
- 👤 Robert T. Love
- 👤 William R. Bayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:01
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/7097; H04W; H04W52/00; H04W52/04; H04W52/06; H04W52/12; G; G01; G01S; G01S11/00; G01S11/02; G01S11/06; H04B7/00; H04B7/24; H04B7/26; H04W52/18; H04W52/28; H04W52/282
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
113 words
A method for power control in a communication system where a base station compares an energy of a signal received from a remote unit to a first threshold and instructs the remote unit to power up or power down based on the comparison, the method comprising the steps of: determining a speed of the remote unit; adjusting the first threshold based on the speed to create a second threshold; comparing the energy of the signal received from the remote unit to the second threshold; instructing the remote unit to power up or power down based on the comparison to the second threshold; and further varying the second threshold based on a frame-quality measurement.
Claim 2
Independent Claim
113 words
A method for power control in a communication system where a base station compares an energy of a signal received from a remote unit to a first threshold and instructs the remote unit to power up or power down based on the comparison, the method comprising the steps of: determining a speed of the remote unit; adjusting the first threshold based on the speed to create a second threshold; comparing the energy of the signal received from the remote unit to the second threshold; instructing the remote unit to power up or power down based on the comparison to the second threshold; and further varying the second threshold based on a frame-quality measurement.
Claim 3
Dependent Claim
24 words
The method of claim 1 further comprising the step of transmitting a power-adjustment command based on the second threshold and a received power-control group.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein the speed of the remote unit is based on moments of a power spectral density from the signal received from the remote unit.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the communication system comprises a code-division, multiple-access (CDMA) communication system.
Claim 6
Independent Claim
121 words
A method for power control in a communication system where a base station compares an energy of a signal received from a remote unit to a first threshold and instructs the remote unit to power up or power down based on the comparison, the method comprising the steps of: determining an energy of the received signal to produce a received energy; determining a speed of the remote unit to produce a determined speed; determining a second power-control threshold value based on the determined speed; further varying the second threshold based on a frame-quality measurement; comparing the received energy to the second power-control threshold value to produce a comparison; and sending a power-adjustment command to the remote unit based on the comparison.
Claim 7
Independent Claim
121 words
A method for power control in a communication system where a base station compares an energy of a signal received from a remote unit to a first threshold and instructs the remote unit to power up or power down based on the comparison, the method comprising the steps of: determining an energy of the received signal to produce a received energy; determining a speed of the remote unit to produce a determined speed; determining a second power-control threshold value based on the determined speed; further varying the second threshold based on a frame-quality measurement; comparing the received energy to the second power-control threshold value to produce a comparison; and sending a power-adjustment command to the remote unit based on the comparison.
Claim 8
Dependent Claim
14 words
The method of claim 5 wherein the received signal comprises a received power-control group.
Claim 9
Dependent Claim
89 words
The method of claim 5 wherein the step of determining the speed of the remote unit comprises the steps of: buffering a fast Hadamard transform of a received signal to create a plurality of buffered elements; computing a Discrete Fourier Transform of the plurality of buffered elements to create a DFT result; forming a magnitude square of the DFT result to create a power spectral density estimate (PSD); forming a second central moment of the PSD; and estimating a velocity based on the second central moment of the PSD.
Claim 10
Independent Claim
107 words
An apparatus for power control in a communication system where a base station compares an energy of a signal received from a remote unit to an instantaneous threshold and instructs the remote unit to power up or power down based on the comparison, the apparatus comprising: a speed computer for determining a speed of the remote unit; a target threshold computer coupled to the speed computer, said target threshold computer determining a target threshold based on the speed of the remote unit; an instantaneous threshold computer for determining the instantaneous threshold based on a quality of the signal transmitted by the remote unit and the target threshold.
Claim 11
Independent Claim
107 words
An apparatus for power control in a communication system where a base station compares an energy of a signal received from a remote unit to an instantaneous threshold and instructs the remote unit to power up or power down based on the comparison, the apparatus comprising: a speed computer for determining a speed of the remote unit; a target threshold computer coupled to the speed computer, said target threshold computer determining a target threshold based on the speed of the remote unit; an instantaneous threshold computer for determining the instantaneous threshold based on a quality of the signal transmitted by the remote unit and the target threshold.
Claim 12
Dependent Claim
13 words
The apparatus of claim 8 wherein the quality is based on frame erasures.
Claim 13
Dependent Claim
22 words
The apparatus of claim 8 further comprising a comparator coupled to comparison unit, said comparator providing the received energy to comparison unit.
Claim 14
Independent Claim
88 words
An apparatus for power control in a communication system where a base station compares an energy of a signal received from a remote unit to a power-control threshold and instructs the remote unit to power up or power down based on the comparison, the apparatus comprising: a target threshold computer for assigning the power-control threshold a target threshold based on a remote unit speed; and an instantaneous threshold computer for further varying the power control threshold based on a quality of the signal received from the remote unit.
Claim 15
Independent Claim
88 words
An apparatus for power control in a communication system where a base station compares an energy of a signal received from a remote unit to a power-control threshold and instructs the remote unit to power up or power down based on the comparison, the apparatus comprising: a target threshold computer for assigning the power-control threshold a target threshold based on a remote unit speed; and an instantaneous threshold computer for further varying the power control threshold based on a quality of the signal received from the remote unit.
Claim 16
Dependent Claim
19 words
The apparatus of claim 11 wherein the quality of the signal is based on a frame erasure rate (FER).
Claim 17
Dependent Claim
22 words
The apparatus of claim 11 further comprising a comparator coupled to comparison unit, said comparator providing the received energy to comparison unit.
Claim 18
Independent Claim
141 words
A method for power control in a communication system where a base station compares an energy of a signal received from a remote unit to an instantaneous threshold and instructs the remote unit to power up or power down based on the comparison, the method comprising the steps of: determining frame quality information; adjusting the instantaneous threshold based on the frame quality information; adjusting the instantaneous threshold at a first rate when the instantaneous threshold is above a target threshold; adjusting the instantaneous threshold at a second rate when the instantaneous threshold is below the target threshold; adjusting the target threshold based on the frame quality information; comparing the energy of the signal received from the remote unit to the instantaneous threshold; and instructing the remote unit to power up or power down based on the comparison to the instantaneous threshold.
Claim 19
Independent Claim
141 words
A method for power control in a communication system where a base station compares an energy of a signal received from a remote unit to an instantaneous threshold and instructs the remote unit to power up or power down based on the comparison, the method comprising the steps of: determining frame quality information; adjusting the instantaneous threshold based on the frame quality information; adjusting the instantaneous threshold at a first rate when the instantaneous threshold is above a target threshold; adjusting the instantaneous threshold at a second rate when the instantaneous threshold is below the target threshold; adjusting the target threshold based on the frame quality information; comparing the energy of the signal received from the remote unit to the instantaneous threshold; and instructing the remote unit to power up or power down based on the comparison to the instantaneous threshold.
References Cited (Backward Citations)
US5267262A
Cited
US5216692A
Cited
US5448761A
Cited
US5548806A
Cited
GB2287379A
Cited
US5450453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-07-06 | 2002-01-05 | 2002-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-06 | 2006-01-05 | 2006-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-06 | 2010-01-05 | 2010-07-07 | $7700.00 | Window Closed / Lapsed |