Patent US5771461A successfully refreshed from Google Patents.
US5771461A
Expired / Lapsed
US
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Method and apparatus for power control of a first channel based on a signal quality of a second channel
Assignee: Google Technology Holdings LLC
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Filing: 1996-06-28
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Granted: 1998-06-23
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Expires: 2016-06-28
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
2026-10-24 21:01
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: 19
Claim 1
Independent Claim
124 words
A method of power control in a communication system, the method comprising the steps of: communicating, via a first base station, to a remote unit on a first channel at a first power level; determining a signal quality metric of the first channel, wherein the signal quality metric is based on a ratio of the first channel power to that of a total received power and additionally based on a number of active rays to the remote unit generated by a plurality of base stations due to soft/softer handoff; and originating a call, via the first base station, on a second channel at a second power level, said second power level different from said first power level and based on the signal quality metric.
Claim 2
Independent Claim
124 words
A method of power control in a communication system, the method comprising the steps of: communicating, via a first base station, to a remote unit on a first channel at a first power level; determining a signal quality metric of the first channel, wherein the signal quality metric is based on a ratio of the first channel power to that of a total received power and additionally based on a number of active rays to the remote unit generated by a plurality of base stations due to soft/softer handoff; and originating a call, via the first base station, on a second channel at a second power level, said second power level different from said first power level and based on the signal quality metric.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein the step of communicating to the remote unit on the first channel comprises the step of communicating to the remote unit on a pilot channel.
Claim 4
Dependent Claim
31 words
The method of claim 1 wherein the step of communicating to the remote unit on the second channel comprises the step of communicating to the remote unit on a traffic channel.
Claim 5
Dependent Claim
32 words
The method of claim 1 further comprising the step of determining a remote unit speed and determining the signal quality metric based on the first channel Ec/Io and the remote unit speed.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein the communication system is a spread-spectrum communication system.
Claim 7
Independent Claim
145 words
A method of power control in a communication system, the method comprising the steps of: transmitting from cellular infrastructure equipment to a remote unit at a first power level; receiving, by the cellular infrastructure equipment, one of a Power Measurement Report Message (PMRM) or a pilot Strength Measurement Message (PSMM) to produce a received message; determining, at the cellular infrastructure equipment from the received message, a signal quality metric existing at the remote unit wherein said signal quality metric is based on a ratio of the first power to that of a total received power, and additionally based on a number of active rays to the remote unit generated by a plurality of base stations due to soft/softer handoff; and transmitting from the cellular infrastructure equipment to the remote unit at a second power level, said second power level based on the step of determining.
Claim 8
Independent Claim
145 words
A method of power control in a communication system, the method comprising the steps of: transmitting from cellular infrastructure equipment to a remote unit at a first power level; receiving, by the cellular infrastructure equipment, one of a Power Measurement Report Message (PMRM) or a pilot Strength Measurement Message (PSMM) to produce a received message; determining, at the cellular infrastructure equipment from the received message, a signal quality metric existing at the remote unit wherein said signal quality metric is based on a ratio of the first power to that of a total received power, and additionally based on a number of active rays to the remote unit generated by a plurality of base stations due to soft/softer handoff; and transmitting from the cellular infrastructure equipment to the remote unit at a second power level, said second power level based on the step of determining.
Claim 9
Dependent Claim
21 words
The method of claim 6 wherein the steps of transmitting comprises the transmitting to the remote unit on a traffic channel.
Claim 10
Dependent Claim
20 words
The method of claim 6 wherein said signal quality metric is additionally based on a time between the received PMRM.
Claim 11
Dependent Claim
20 words
The method of claim 8 wherein the signal quality metric is further based on a estimation of unreported bad frames.
Claim 12
Dependent Claim
14 words
The method of claim 6 wherein the communication system is a spread-spectrum communication system.
Claim 13
Dependent Claim
19 words
The method of claim 6 wherein the signal quality metric is derived from Ec/Io information from all active demodulators.
Claim 14
Dependent Claim
21 words
The method of claim 6 further comprising the step of adjusting a gain reduction rate based on the signal quality metric.
Claim 15
Dependent Claim
22 words
The method of claim 6 further comprising the step of adjusting a gain step up size based on the frame quality metric.
Claim 16
Independent Claim
141 words
An apparatus for power control in a communication system, the apparatus comprising: cellular infrastructure equipment communicating, via a first base station, to a remote unit on a first channel at a first power level; and an instantaneous traffic channel gain estimation computer (ITC) coupled to the cellular infrastructure equipment, said ITC determining a signal quality metric of the first channel wherein the signal quality metric is based on a ratio of the first channel power to that of a total received power and additionally based on a number of active rays to the remote unit generated by a plurality of base stations due to soft/softer handoff, and originating a call, via the first base station, on a second channel at a second power level, said second power level different from said first power level and based on the signal quality metric.
Claim 17
Independent Claim
141 words
An apparatus for power control in a communication system, the apparatus comprising: cellular infrastructure equipment communicating, via a first base station, to a remote unit on a first channel at a first power level; and an instantaneous traffic channel gain estimation computer (ITC) coupled to the cellular infrastructure equipment, said ITC determining a signal quality metric of the first channel wherein the signal quality metric is based on a ratio of the first channel power to that of a total received power and additionally based on a number of active rays to the remote unit generated by a plurality of base stations due to soft/softer handoff, and originating a call, via the first base station, on a second channel at a second power level, said second power level different from said first power level and based on the signal quality metric.
Claim 18
Independent Claim
149 words
An apparatus for power control in a communication system, the apparatus comprising: cellular infrastructure equipment transmitting from cellular infrastructure equipment to a remote unit at a first power level, said cellular infrastructure equipment receiving one of a Power Measurement Report Message (PMRM) or a Pilot Strength Measurement Message (PSMM) to produce a received message; and a post-initial forward power control computer (PFC) coupled to the cellular infrastructure equipment, said PFC determining from the received message, a signal quality metric existing at the remote unit wherein said signal quality metric is based on a ratio of the first power level to that of a total received power and additionally based on a number of active rays to the remote unit generated by a plurality of base stations due to soft/softer handoff and transmitting to the remote unit at a second power level, said second power level based on the determination.
Claim 19
Independent Claim
149 words
An apparatus for power control in a communication system, the apparatus comprising: cellular infrastructure equipment transmitting from cellular infrastructure equipment to a remote unit at a first power level, said cellular infrastructure equipment receiving one of a Power Measurement Report Message (PMRM) or a Pilot Strength Measurement Message (PSMM) to produce a received message; and a post-initial forward power control computer (PFC) coupled to the cellular infrastructure equipment, said PFC determining from the received message, a signal quality metric existing at the remote unit wherein said signal quality metric is based on a ratio of the first power level to that of a total received power and additionally based on a number of active rays to the remote unit generated by a plurality of base stations due to soft/softer handoff and transmitting to the remote unit at a second power level, said second power level based on the determination.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-22 | 2001-12-22 | 2002-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-22 | 2005-12-22 | 2006-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-22 | 2009-12-22 | 2010-06-23 | $7700.00 | Window Closed / Lapsed |