US5862453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for power control in a communication system using active demodulators
Assignee: Google Technology Holdings LLC
•
Filing: 1997-08-15
•
Granted: 1999-01-19
•
Expires: 2017-08-15
Abstract
Abstract Power control in a spread-spectrum communication system takes place by determining origination power of a traffic channel based on a number of active demodulators and pilot channel signal quality (610). Once origination transmit power is determined and call origination takes place, the transmit power is reduced at a first rate when a time is less than a time for all active demodulators to be established (615), otherwise the transmit power is reduced at a second rate (621). After all active demodulators have been acquired power control takes place by receiving a Power Measurement Report Message (PMRM) or a Pilot Strength Measurement Message (PSMM), determining, a signal quality metric existing at the remote unit based on the PMRM or PSMM, and adjusting transmit power based on the signal quality metric (645).
Inventors
- 👤 Robert T. Love
- 👤 Barry J. Menich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:46
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/24; H04B7/26; H04W; H04W52/00; H04W52/04; H04W52/06; H04W52/16; G; G01; G01S; G01S11/00; G01S11/02; G01S11/06; H04W52/18; H04W52/28; H04W52/282; H04W52/283
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
72 words
A method of power control in a communication system, the method comprising the steps of: transmitting on a first channel, at a first power level, said first power level based on a number of active demodulators; and reducing the first power level at a first rate when less than a predetermined number of active demodulators have been acquired by a remote unit, otherwise reducing the first power level at a second rate.
Claim 2
Independent Claim
72 words
A method of power control in a communication system, the method comprising the steps of: transmitting on a first channel, at a first power level, said first power level based on a number of active demodulators; and reducing the first power level at a first rate when less than a predetermined number of active demodulators have been acquired by a remote unit, otherwise reducing the first power level at a second rate.
Claim 3
Dependent Claim
51 words
The method of claim 1 further comprising the step of transmitting on the first channel at a second power level based on a signal quality metric existing at a remote unit, said second power level additionally based on the time for all active demodulators to be acquired by the remote unit.
Claim 4
Dependent Claim
32 words
The method of claim 2 wherein the signal quality metric is determined based on a number of frames that have been transmitted since a Power Measurement Report Message (PMRM) has been received.
Claim 5
Dependent Claim
20 words
The method of claim 3 wherein the signal quality metric is further based on an estimation of unreported bad frames.
Claim 6
Dependent Claim
27 words
The method of claim 1 wherein the step of transmitting on the first channel comprises the step of transmitting to a remote unit on a traffic channel.
Claim 7
Dependent Claim
14 words
The method of claim 1 wherein the communication system is a spread-spectrum communication system.
Claim 8
Dependent Claim
31 words
The method of claim 1 wherein the step of reducing the first power level at the first rate comprises reducing the first power level at a rate substantially equal to zero.
Claim 9
Independent Claim
86 words
An apparatus for power control in a communication system, the apparatus comprising: cellular infrastructure equipment transmitting on a first channel, at a first power level, said first power level based on a number of active demodulators; and initial forward power control computer (IFC) coupled to the cellular infrastructure equipment, said IFC reducing the first power level at a first rate when less than a predetermined number of active demodulators have been acquired by a remote unit, otherwise reducing the first power level at a second rate.
Claim 10
Independent Claim
86 words
An apparatus for power control in a communication system, the apparatus comprising: cellular infrastructure equipment transmitting on a first channel, at a first power level, said first power level based on a number of active demodulators; and initial forward power control computer (IFC) coupled to the cellular infrastructure equipment, said IFC reducing the first power level at a first rate when less than a predetermined number of active demodulators have been acquired by a remote unit, otherwise reducing the first power level at a second rate.
Claim 11
Independent Claim
124 words
A method of power control in a communications system, the method comprising the steps of: transmitting on a first channel, at a power level, said power level based on a number of active demodulators; reducing the power level at a first rate when less than a predetermined number of active demodulators have been acquired by a remote unit, otherwise reducing the power level at a second rate and maintaining the second rate of reduction until an event occurs, the event chosen from the group consisting of the power level reaching a minimum allowed power, detecting a degradation in signal quality, and having a change in the number of active demodulators; and reducing the power level at a third rate based on the event occurring.
Claim 12
Independent Claim
124 words
A method of power control in a communications system, the method comprising the steps of: transmitting on a first channel, at a power level, said power level based on a number of active demodulators; reducing the power level at a first rate when less than a predetermined number of active demodulators have been acquired by a remote unit, otherwise reducing the power level at a second rate and maintaining the second rate of reduction until an event occurs, the event chosen from the group consisting of the power level reaching a minimum allowed power, detecting a degradation in signal quality, and having a change in the number of active demodulators; and reducing the power level at a third rate based on the event occurring.
Claim 13
Dependent Claim
51 words
The method of claim 9 further comprising the step of transmitting on the first channel at a second power level based on a signal quality metric existing at a remote unit, said second power level additionally based on the time for all active demodulators to be acquired by the remote unit.
Claim 14
Dependent Claim
26 words
The method of claim 9 where the number of active demodulators corresponds to the number of first channels that are being transmitted to the remote unit.
Claim 15
Dependent Claim
19 words
The method of claim 9 wherein the second rate of reduction is greater than the third rate of reduction.
References Cited (Backward Citations)
US5497505A
Cited
US5455964A
Cited
US5487180A
Cited
US5734967A
Cited
US5511067A
Cited
US5675581A
Cited
US5625640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-01-18 | 2002-07-20 | 2003-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-01-18 | 2006-07-20 | 2007-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-01-18 | 2010-07-20 | 2011-01-19 | $7700.00 | Window Closed / Lapsed |