US6075974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for adjusting thresholds and measurements of received signals by anticipating power control commands yet to be executed
Assignee: Qualcomm Inc
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Filing: 1996-11-20
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Granted: 2000-06-13
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Expires: 2016-11-20
Abstract
Abstract The present invention provides a method and apparatus for providing improved quality or power control by recognizing the delays inherent in a closed-loop communication system. The mobile station or receiver properly adjusts its forward link quality or power level thresholds or measurements with which it compares incoming frames or portions thereof to reflect the level it anticipates receiving (after the delay). For example, the mobile station can recognize that at a given measurement time, two outstanding messages have not been executed by the transmitter (where each message indicates a corresponding increase of 1 dB). As a result, the mobile station can adjust its measurement threshold down by 2 dB to more closely correspond to future power adjustments. If the currently received frame or portion thereof is still below the readjusted threshold, then the mobile station sends out a new message to request a further increase in the forward link channel.
Inventors
- 👤 Keith W. Saints
- 👤 Tao Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:33
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/18; H04W52/22; H04W52/223; H04B; H04B7/00; H04B7/005; H04W52/06; H04W52/12; H04W52/08; H04W52/20; H04W52/221
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
249 words
A method for controlling the transmission power of communication signals transmitted by a base station, the method comprising the steps of: a) at said base station, receiving a power control command from said user station; b) providing said power control command to a base station controller; c) providing from said base station controller to said base station a power adjustment command in accordance with said power control command, wherein said steps of providing said power control command to said base station controller and providing said power adjustment command to said base station in response thereto results in a response delay; d) transmitting from said base station a current communication signal at a transmit power level based on said power adjustment command; e) at said user station, receiving said current communication signal; f) at said user station, determining a received power level of said current communication signal; g) at said user station, adjusting a power level threshold based on a predetermined number of power control messages previously transmitted by said user station to said base station wherein said predetermined number is determined in accordance with said response delay; h) at said user station, comparing the adjusted power level threshold to said received power level of said current communication signal; i) at said user station, transmitting a current power control message based on said step of comparing; and j) at said base station, transmitting a new communication signal at an adjusted power level in accordance with said current power control message.
Claim 2
Independent Claim
249 words
A method for controlling the transmission power of communication signals transmitted by a base station, the method comprising the steps of: a) at said base station, receiving a power control command from said user station; b) providing said power control command to a base station controller; c) providing from said base station controller to said base station a power adjustment command in accordance with said power control command, wherein said steps of providing said power control command to said base station controller and providing said power adjustment command to said base station in response thereto results in a response delay; d) transmitting from said base station a current communication signal at a transmit power level based on said power adjustment command; e) at said user station, receiving said current communication signal; f) at said user station, determining a received power level of said current communication signal; g) at said user station, adjusting a power level threshold based on a predetermined number of power control messages previously transmitted by said user station to said base station wherein said predetermined number is determined in accordance with said response delay; h) at said user station, comparing the adjusted power level threshold to said received power level of said current communication signal; i) at said user station, transmitting a current power control message based on said step of comparing; and j) at said base station, transmitting a new communication signal at an adjusted power level in accordance with said current power control message.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said response delay is approximately two frames.
Claim 4
Dependent Claim
43 words
The method of claim 1 further comprising the step of generating a random value when said adjusted power level threshold is equal to said received power level of said current communication signal, and generating said current power control message from said random value.
Claim 5
Independent Claim
135 words
A method for controlling transmission signal power of signals transmitted by a base station, the method comprising the steps of: a) at said base station, transmitting a current communication signal; b) at a user station, receiving said current communication signal from said base station; c) at said user station, decoding said current communication signal; d) at said user station, performing a quality measurement of said current communication signal; e) at said user station, determining the value of a current error indicator bit in accordance with said quality measurement of said decoded signal and at least one previously transmitted error indicator bit; f) at said user station, transmitting said current error indicator bit; and g) at said base station, transmitting a new communication signal at an adjusted power level based on said current error indicator bit.
Claim 6
Independent Claim
135 words
A method for controlling transmission signal power of signals transmitted by a base station, the method comprising the steps of: a) at said base station, transmitting a current communication signal; b) at a user station, receiving said current communication signal from said base station; c) at said user station, decoding said current communication signal; d) at said user station, performing a quality measurement of said current communication signal; e) at said user station, determining the value of a current error indicator bit in accordance with said quality measurement of said decoded signal and at least one previously transmitted error indicator bit; f) at said user station, transmitting said current error indicator bit; and g) at said base station, transmitting a new communication signal at an adjusted power level based on said current error indicator bit.
Claim 7
Dependent Claim
25 words
The method of claim 4 wherein said step of performing a quality measurement further comprises measuring signal to noise ratio of said current communication signal.
Claim 8
Dependent Claim
25 words
The method of claim 4 wherein said step of performing a quality measurement further comprises measuring the symbol error rate of said current communication signal.
Claim 9
Dependent Claim
24 words
The method of claim 4 wherein said step of performing a quality measurement further comprises measuring the Yamamoto metric of said current communication signal.
Claim 10
Dependent Claim
26 words
The method of claim 4 wherein said step of performing a quality measurement further comprises evaluating the parity bit check indication of said current communication signal.
Claim 11
Independent Claim
160 words
A method for controlling transmission signal power of communication signals transmitted by a base station, the method comprising the steps of: a) at said base station, transmitting a current communication signal; b) at a user station, receiving said current communication signal from said base station; c) at said user station, determining a power level of said current communication signal; d) at said user station, comparing a power level threshold to said power level of said current communication signal; e) at said user station, generating a power control message based on said step of comparing; f) at said user station, reversing the value of said power control message when a predetermined number of messages of like value have been generated, to produce a reversed power control message; g) at said user station, transmitting said reversed power control message; and h) at said base station, transmitting a new communication signal at an adjusted power level based on said reversed power control message.
Claim 12
Independent Claim
160 words
A method for controlling transmission signal power of communication signals transmitted by a base station, the method comprising the steps of: a) at said base station, transmitting a current communication signal; b) at a user station, receiving said current communication signal from said base station; c) at said user station, determining a power level of said current communication signal; d) at said user station, comparing a power level threshold to said power level of said current communication signal; e) at said user station, generating a power control message based on said step of comparing; f) at said user station, reversing the value of said power control message when a predetermined number of messages of like value have been generated, to produce a reversed power control message; g) at said user station, transmitting said reversed power control message; and h) at said base station, transmitting a new communication signal at an adjusted power level based on said reversed power control message.
Claim 13
Independent Claim
152 words
A method for controlling transmission signal power of communication signals transmitted by a base station, the method comprising the steps of: a) at said base station, transmitting a current communication signal; b) at a user station, receiving said current communication signal from said base station; c) at said user station, computing a symbol error rate of said current communication signal; d) at said user station, adjusting a symbol error rate threshold based on at least one prior power control message previously transmitted by said user station to said base station; e) at said user station, comparing the adjusted symbol error rate threshold to said symbol error rate of said current communication signal; f) at said user station, transmitting a current power control message based on said step of comparing; and g) at said base station, transmitting a new communication signal at an adjusted power level based on said current power control message.
Claim 14
Independent Claim
152 words
A method for controlling transmission signal power of communication signals transmitted by a base station, the method comprising the steps of: a) at said base station, transmitting a current communication signal; b) at a user station, receiving said current communication signal from said base station; c) at said user station, computing a symbol error rate of said current communication signal; d) at said user station, adjusting a symbol error rate threshold based on at least one prior power control message previously transmitted by said user station to said base station; e) at said user station, comparing the adjusted symbol error rate threshold to said symbol error rate of said current communication signal; f) at said user station, transmitting a current power control message based on said step of comparing; and g) at said base station, transmitting a new communication signal at an adjusted power level based on said current power control message.
References Cited (Backward Citations)
US4123718A
Cited
US3925782A
Cited
US4112257A
Cited
US4225976A
Cited
US4193031A
Cited
US4222115A
Cited
US4580262A
Cited
US4495648A
Cited
US4641322A
Cited
US4613990A
Cited
US4868795A
Cited
US4766599A
Cited
EP0212667A2
Cited
US4672658A
Cited
US4777653A
Cited
US4765753A
Cited
US4811421A
Cited
US4901307A
Cited
US4870698A
Cited
US5077742A
Cited
US5257283A
Cited
US5056109A
Cited
US5504773A
Cited
US5093840A
Cited
US5535238A
Cited
WO1992017011A1
Cited
US5305468A
Cited
US5450616A
Cited
US5761212A
Cited
US5461639A
Cited
US5570353A
Cited
US5574972A
Cited
US5623486A
Cited
US5699485A
Cited
US5778030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-06-13 | 2003-12-13 | 2004-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-06-13 | 2007-12-13 | 2008-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-06-13 | 2011-12-13 | 2012-06-13 | $7700.00 | Window Closed / Lapsed |