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US5216692A
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Method and apparatus for adjusting a power control threshold in a communication system
Assignee: Motorola Mobility LLC
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Filing: 1992-03-31
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Granted: 1993-06-01
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Expires: 2012-03-31
Abstract
Abstract A method and apparatus is provided for maintaining received signal power levels at an average level when a signal power estimate is on average similar to the average of actually received signal power levels. The maintaining of the received signal power levels is accomplished by generating an estimate of the power of a received signal. Subsequently, a difference signal is generated by subtracting the estimated received signal power from a predetermined reference signal power. Finally, a signal power control threshold is adjusted as a function of the difference signal.
Inventors
- 👤 Fuyun Ling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:36
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/06; H04W52/12; H04W52/08; H04W52/18; H04W52/22; H04W52/225; H04W52/30; H04W52/36
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
96 words
An apparatus for maintaining received signal power levels at an average level when a signal power estimate on average is similar to the average of actually received signal power levels, comprising: (a) estimating means for generating an estimate of the power of a received signal; (b) difference means, operatively coupled to the estimating means, for generating a difference signal by subtracting the estimated received signal power from a predetermined reference signal power; and (c) adjustment means, operatively coupled to the difference means, for adjusting a signal power control threshold as a function of the difference signal.
Claim 2
Independent Claim
96 words
An apparatus for maintaining received signal power levels at an average level when a signal power estimate on average is similar to the average of actually received signal power levels, comprising: (a) estimating means for generating an estimate of the power of a received signal; (b) difference means, operatively coupled to the estimating means, for generating a difference signal by subtracting the estimated received signal power from a predetermined reference signal power; and (c) adjustment means, operatively coupled to the difference means, for adjusting a signal power control threshold as a function of the difference signal.
Claim 3
Dependent Claim
29 words
The apparatus of claim 1 wherein the estimating means generates an estimate of the power of a received signal by averaging a plurality of the signal power estimates together.
Claim 4
Dependent Claim
43 words
The apparatus of claim 1 further comprising a power control means, operatively coupled to the adjustment means, for setting a power control indicator in response to the result of a comparison between the received signal power estimate and the adjusted power control threshold.
Claim 5
Dependent Claim
28 words
The apparatus of claim 3 further comprising a signal transmitting means, operatively coupled to the power control means, for transmitting the power control indicator over a communication channel.
Claim 6
Dependent Claim
41 words
The apparatus of claim 4 wherein the signal transmitting means comprises means for preparing the power control indicator for transmission over the communication channel by spreading the power control indicator with a spreading code prior to transmission over the communication channel.
Claim 7
Dependent Claim
29 words
The apparatus of claim 4 wherein the communication channel is selected from the group consisting essentially of an electronic data bus, radio communication link, wireline and optical fiber link.
Claim 8
Dependent Claim
57 words
The apparatus of claim 4 further comprising: (a) signal receiving means for detecting a power control indicator within a signal received from over the communication channel; and (b) power adjustment means, operatively coupled to the signal receiving means, for adjusting a particular signal transmission power of a signal transmitter in response to the detected power control indicator.
Claim 9
Dependent Claim
27 words
The apparatus of claim 7 wherein the signal receiving means comprises means for despreading the received signal with a spreading code to detect the power control indicator.
Claim 10
Dependent Claim
55 words
The apparatus of claim 1 wherein the adjustment means adjusts the signal power control threshold according to the following function: THR(n)=THR(n-1)+μ[P.sub.ref -P(n)] where, n=a moment in time; THR(n)=signal power control threshold at time n; μ=a threshold adaption step size; P ref =a predetermined reference signal power; and P(n)=an estimated received signal power at time n.
Claim 11
Independent Claim
75 words
A method for maintaining received signal power levels at an average level when a signal power estimate on average is similar to the average of actually received signal power levels, comprising: (a) generating an estimate of the power of a received signal; (b) generating a difference signal by substracting the estimated received signal power from a predetermined reference signal power; and (c) adjusting a signal power control threshold as a function of the difference signal.
Claim 12
Independent Claim
75 words
A method for maintaining received signal power levels at an average level when a signal power estimate on average is similar to the average of actually received signal power levels, comprising: (a) generating an estimate of the power of a received signal; (b) generating a difference signal by substracting the estimated received signal power from a predetermined reference signal power; and (c) adjusting a signal power control threshold as a function of the difference signal.
Claim 13
Dependent Claim
29 words
The apparatus of claim 10 wherein the estimating means generates an estimate of the power of a received signal by averaging a plurality of the signal power estimates together.
Claim 14
Dependent Claim
35 words
The method of claim 10 further comprising a step of setting a power control indicator in response to the result of a comparison between the received signal power estimate and the adjusted power control threshold.
Claim 15
Dependent Claim
19 words
The method of claim 12 further comprising a step of transmitting the power control indicator over a communication channel.
Claim 16
Dependent Claim
39 words
The method of claim 13 wherein the step of transmitting comprises preparing the power control indicator for transmission over the communication channel by spreading the power control indicator with a spreading code prior to transmission over the communication channel.
Claim 17
Dependent Claim
29 words
The method of claim 10 wherein the communication channel is selected from the group consisting essentially of an electronic data bus, radio communication link, wireline and optical fiber link.
Claim 18
Dependent Claim
45 words
The method of claim 13 further comprising the steps of: (a) detecting a power control indicator within a signal received from over the communication channel; and (b) adjusting a particular signal transmission power of a signal transmitter in response to the detected power control indicator.
Claim 19
Dependent Claim
25 words
The method of claim 16 wherein the step of detecting comprises despreading the received signal with a spreading code to detect the power control indicator.
Claim 20
Dependent Claim
53 words
The method of claim 10 wherein the signal power control threshold is adjusted according to the following function: THR(n)=THR(n-1)+μ[P.sub.ref -P(n)] where, n=a moment in time; THR(n)=signal power control threshold at time n; μ=a threshold adaption step size; P ref =a predetermined reference signal power; and P(n)=an estimated received signal power at time n.
Claim 21
Independent Claim
153 words
An apparatus for maintaining received signal power levels at an average level when a signal power estimate on average is similar to the average of actually received signal power levels, comprising: (a) estimating means for generating an estimate of the power of a received signal; (b) difference means, operatively coupled to the estimating means, for generating a difference signal by subtracting the estimated received signal power from a predetermined reference signal power; (c) adjustment means, operatively coupled to the difference means, for adjusting a signal power control threshold as a function of the difference signal; (d) power control means, operatively coupled to the adjustment means, for setting a power control indicator in response to the result of a comparison between the received signal power estimate and the adjusted power control threshold; and (e) signal transmitting means, operatively coupled to the power control means, for transmitting the power control indicator over a communication channel.
Claim 22
Independent Claim
153 words
An apparatus for maintaining received signal power levels at an average level when a signal power estimate on average is similar to the average of actually received signal power levels, comprising: (a) estimating means for generating an estimate of the power of a received signal; (b) difference means, operatively coupled to the estimating means, for generating a difference signal by subtracting the estimated received signal power from a predetermined reference signal power; (c) adjustment means, operatively coupled to the difference means, for adjusting a signal power control threshold as a function of the difference signal; (d) power control means, operatively coupled to the adjustment means, for setting a power control indicator in response to the result of a comparison between the received signal power estimate and the adjusted power control threshold; and (e) signal transmitting means, operatively coupled to the power control means, for transmitting the power control indicator over a communication channel.
Claim 23
Dependent Claim
57 words
The apparatus of claim 19 further comprising: (a) signal receiving means for detecting a power control indicator within a signal received from over the communication channel; and (b) power adjustment means, operatively coupled to the signal receiving means, for adjusting a particular signal transmission power of a signal transmitter in response to the detected power control indicator.
Claim 24
Dependent Claim
55 words
The apparatus of claim 19 wherein the adjustment means adjusts the signal power control threshold according to the following function: THR(n)=THR(n-1)+μ[P.sub.ref -P(n)] where, n=a moment in time; THR(n)=signal power control threshold at time n; μ=a threshold adaption step size; P ref =a predetermined reference signal power; and P(n)=an estimated received signal power at time n.
Claim 25
Independent Claim
111 words
A method for maintaining received signal power levels at an average level when a signal power estimate on average is similar to the average of actually received signal power levels, comprising: (a) generating an estimate of the power of a received signal; (b) generating a difference signal by subtracting the estimated received signal power from a predetermined reference signal power; (c) adjusting a signal power control threshold as a function of the difference signal (d) setting a power control indicator in response to the result of a comparison between the received signal power estimate and the adjusted power control threshold; and (e) transmitting the power control indicator over a communication channel.
Claim 26
Independent Claim
111 words
A method for maintaining received signal power levels at an average level when a signal power estimate on average is similar to the average of actually received signal power levels, comprising: (a) generating an estimate of the power of a received signal; (b) generating a difference signal by subtracting the estimated received signal power from a predetermined reference signal power; (c) adjusting a signal power control threshold as a function of the difference signal (d) setting a power control indicator in response to the result of a comparison between the received signal power estimate and the adjusted power control threshold; and (e) transmitting the power control indicator over a communication channel.
Claim 27
Dependent Claim
45 words
The method of claim 22 further comprising the steps of: (a) detecting a power control indicator within a signal received from over the communication channel; and (b) adjusting a particular signal transmission power of a signal transmitter in response to the detected power control indicator.
Claim 28
Dependent Claim
53 words
The method of claim 22 wherein the signal power control threshold is adjusted according to the following function: THR(n)=THR(n-1)+μ[P.sub.ref -P(n)] where, n=a moment in time; THR(n)=signal power control threshold at time n; μ=a threshold adaption step size; P ref =a predetermined reference signal power; and P(n)=an estimated received signal power at time n.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |