Patent US6690944B1 successfully refreshed from Google Patents.
US6690944B1
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US
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Power control of a multi-subchannel mobile station in a mobile communication system
Assignee: BlackBerry Ltd
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Filing: 1999-04-12
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Granted: 2004-02-10
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Expires: 2019-04-12
Abstract
Abstract A closed loop power control apparatus is implemented within a basestation that receives a series of physical channels from a mobile station simultaneously in a DS-CDMA communication system such as those based on the cdma2000 specifications. This power control apparatus includes a series of Rakes that separate the code-subchannels, a series of SINR estimation devices that estimate the SINR for each of the code-subchannels, and a series of comparators thaw generate a multiple of power control bits that correspond to comparison results between the SINR estimates and a set of power threshold levels. These power control bits are transmitted to the mobile station and subsequently allow the mobile station to control the transmit powers for the physical channels individually.
Inventors
- 👤 Wookwon Lee
- 👤 Norman P. Secord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:18
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/18; H04W52/22; H04W52/228; H04W52/06; H04W52/14; H04W52/146; H04W52/24; H04W52/38; H04W52/50
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
150 words
A method of controlling a transmit power of a mobile station with a base station operable to receive a plurality of physical channels from the mobile station simultaneously, the method comprising for each power control period: estimating a power characteristic of at least two of said physical channels, for each of at least two physical channels, the power characteristic being determined as a function of a signal power, a noise power and an interference power with the noise power and interference power being determined from a plurality of power samples from previous power control periods; and controlling the transmit power of each of the plurality of physical channels at the mobile station by sending at least one power control command to the mobile station determined with use of the power characteristic estimates with an objective that at least a respective minimum quality of service of each physical channel is maintained.
Claim 2
Independent Claim
150 words
A method of controlling a transmit power of a mobile station with a base station operable to receive a plurality of physical channels from the mobile station simultaneously, the method comprising for each power control period: estimating a power characteristic of at least two of said physical channels, for each of at least two physical channels, the power characteristic being determined as a function of a signal power, a noise power and an interference power with the noise power and interference power being determined from a plurality of power samples from previous power control periods; and controlling the transmit power of each of the plurality of physical channels at the mobile station by sending at least one power control command to the mobile station determined with use of the power characteristic estimates with an objective that at least a respective minimum quality of service of each physical channel is maintained.
Claim 3
Dependent Claim
31 words
A method according to claim 1 , wherein the controlling the transmit power at the mobile station comprises generating a power control bit corresponding to each of the power characteristic estimates.
Claim 4
Dependent Claim
32 words
A method according to claim 1 , wherein the estimating a power characteristic of at least two of said physical channels comprises estimating a power characteristic for each of said physical channels.
Claim 5
Dependent Claim
25 words
A method according to claim 3 , wherein the power control commands comprise a power control bit corresponding to each of the power characteristic estimates.
Claim 6
Dependent Claim
19 words
A method according to claim 1 , wherein the power characteristic that is estimated is a signal-to-interference-plus-noise ratio (SINR).
Claim 7
Dependent Claim
17 words
A method according to claim 1 , wherein each of said physical channels is a code-multiplexed subchannel.
Claim 8
Dependent Claim
21 words
A method according to claim 1 further comprising establishing initial settings at the mobile station using open loop power control commands.
Claim 9
Dependent Claim
30 words
A method according to claim 7 further comprising determining power ratios which define desired transmit power ratios between various physical channels, and sending the power ratios to the mobile station.
Claim 10
Dependent Claim
65 words
A method according to claim 5 wherein the estimating a power characteristic comprises: determining an interference-noise power, σ n 2 , that depends on the determined noise power and interference power; determining a signal energy, E b , that depends on an overall signal power minus the interference-noise power; and estimating the SINR by dividing the signal energy, E b , by the interference-noise power.
Claim 11
Independent Claim
138 words
A method of controlling the transit power of a mobile station that is operable to transmit a plurality of physical channels to a basestation simultaneously, the method comprising the steps of for a current power control period: receiving power information from the basestation, the power information being based on a power characteristic of at least two of the plurality of physical channels estimated at the base station with the power characteristic being a function of a signal power, a noise power and an interference power, the noise power and interference power being determined from a plurality of power samples from previous power control periods; and independently setting transmit powers corresponding to said physical channels in response to said power information with an objective that at least a respective minimum quality of service of each physical channel is maintained.
Claim 12
Independent Claim
138 words
A method of controlling the transit power of a mobile station that is operable to transmit a plurality of physical channels to a basestation simultaneously, the method comprising the steps of for a current power control period: receiving power information from the basestation, the power information being based on a power characteristic of at least two of the plurality of physical channels estimated at the base station with the power characteristic being a function of a signal power, a noise power and an interference power, the noise power and interference power being determined from a plurality of power samples from previous power control periods; and independently setting transmit powers corresponding to said physical channels in response to said power information with an objective that at least a respective minimum quality of service of each physical channel is maintained.
Claim 13
Dependent Claim
32 words
A method according to claim 10 , wherein the power information is at least two power control bits and the independently setting transmit powers is in response to the power control bits.
Claim 14
Dependent Claim
54 words
A method according to claim 10 , wherein the receiving power information from the basestation comprises receiving power control bits that correspond to each of said physical channels and the independently setting transmit powers comprises adjusting the transit powers corresponding to each of said physical channels in response to the received power control bits.
Claim 15
Dependent Claim
17 words
A method according to claim 10 , wherein each of said physical channels is a code-multiplexed subchannel.
Claim 16
Dependent Claim
34 words
A method according to claim 10 , wherein the plurality of physical channels comprise a plurality of periods of physical channels, each period comprising one or more physical channels of the same data rate.
Claim 17
Dependent Claim
33 words
A method according to claim 14 , wherein the power information comprises a plurality of power control bits, each power control bit corresponding to a respective one of the periods of physical channels.
Claim 18
Dependent Claim
15 words
A method according to claim 10 wherein the power characteristic is a signal-to-interference-plus-noise ratio (SINR).
Claim 19
Dependent Claim
35 words
A method according to claim 16 wherein the SINR is determined according to E b σ n 2 wherein E b is the desired signal energy and σ n 2 is an average interference-noise power.
Claim 20
Independent Claim
170 words
A method of controlling a transmit power of a mobile station with a base station operable to receive simultaneously a plurality of physical channels with a data signal from a mobile station, the method comprising for a current power control period: receiving the data signal from the mobile station and separating the respective physical channels within the data signal; for each physical channel generating a power characteristic estimate for the physical channel, the power characteristic estimate being a function of a signal power, a noise power and an interference power with the noise power and interference power being determined from a plurality of power samples from previous power control periods; generating at least one power control bit on the basis of the power characteristic estimates and with an objective that at least a respective minimum quality of service of each physical channel is maintained; and controlling the transmit power at the mobile station of each physical channel by transmitting the at least one power control bit to the mobile station.
Claim 21
Independent Claim
170 words
A method of controlling a transmit power of a mobile station with a base station operable to receive simultaneously a plurality of physical channels with a data signal from a mobile station, the method comprising for a current power control period: receiving the data signal from the mobile station and separating the respective physical channels within the data signal; for each physical channel generating a power characteristic estimate for the physical channel, the power characteristic estimate being a function of a signal power, a noise power and an interference power with the noise power and interference power being determined from a plurality of power samples from previous power control periods; generating at least one power control bit on the basis of the power characteristic estimates and with an objective that at least a respective minimum quality of service of each physical channel is maintained; and controlling the transmit power at the mobile station of each physical channel by transmitting the at least one power control bit to the mobile station.
Claim 22
Dependent Claim
19 words
A method according to claim 18 , wherein the power characteristic that is estimated is a signal-to-interference-plus-noise ratio (SINR).
Claim 23
Dependent Claim
17 words
A method according to claim 18 , wherein each of said physical channels is a code-multiplexed subchannel.
Claim 24
Dependent Claim
35 words
A method according to claim 18 , wherein transmitting the at least one power control bit comprises: replacing normal data bits with the at least one power control bit at predetermined locations within a frame.
Claim 25
Dependent Claim
35 words
A method according to claim 18 , wherein generating the at least one power control bit comprises: for each physical channel comparing the power characteristic estimate to a respective power threshold level, generating a comparison.
Claim 26
Dependent Claim
40 words
A method according to claim 22 , wherein the at least one power control bit is a single power bit; and wherein generating the single power control comprises combining all of the comparisons and generating a single power control bit.
Claim 27
Dependent Claim
36 words
A method according to claim 23 further comprising: generating power ratios that indicate relative power levels for the physical channels using the physical channel power threshold levels; and transmitting these power ratios to the mobile station.
Claim 28
Dependent Claim
40 words
A method according to claim 18 , wherein generating the at least one power control bit comprises: for each physical channel comparing the power characteristic estimate to respective dynamically adjustable power threshold level and generating a respective power control bit.
Claim 29
Dependent Claim
39 words
A method according to claim 25 , wherein the at least one power control bit is a plurality of power control bits; and wherein the comparison for each physical channel is a respective one of the power control bits.
Claim 30
Dependent Claim
14 words
A method according to claim 25 , further comprising dynamically updating the threshold levels.
Claim 31
Dependent Claim
54 words
A method according to claim 25 farther comprising: for each physical channel demodulating the physical channel to produce a respective demodulated physical channel for each demodulated physical channel, determining a frame quality corresponding to the demodulated physical channel; and generating and updating a respective power threshold level determined with use of the frame quality.
Claim 32
Dependent Claim
47 words
A method according to claim 18 , wherein generating the at least one power control bit comprises: generating a combined power characteristic estimate using the power characteristic estimates; and comparing the combined power characteristic estimate to a power threshold level to generate a single power control bit.
Claim 33
Dependent Claim
44 words
A method according to claim 29 further comprising: separating a pilot channel from the data signal; estimating the power characteristic of the separated pilot channel; and generating the combined power characteristic estimate with use of the power characteristic estimate corresponding to the pilot channel.
Claim 34
Dependent Claim
73 words
A method according to claim 29 further comprising: for each physical channel demodulating the physical channel to produce a demodulated physical channel; for each demodulated physical channel determining a frame quality corresponding to the demodulated physical channel; for each frame quality generating a physical channel power threshold level using the frame quality; and generating a combined power threshold level that corresponds to the power threshold level using the physical channel power threshold levels.
Claim 35
Dependent Claim
46 words
A method according to claim 29 further comprising: for each physical channel comprising the power characteristic estimate with one of a plurality of physical channel power threshold levels generating a comparison; and transmitting the comparison as a physical channel power control bit to the mobile station.
Claim 36
Dependent Claim
64 words
A method according to claim 32 further comprising: for each physical channel demodulating the physical channel to produce a demodulated physical channel; determining a frame quality corresponding to the demodulated physical channel; generating a physical channel power threshold level using the frame quality; and generating a combined power threshold level that corresponds to the power threshold level using the physical channel power threshold levels.
Claim 37
Dependent Claim
36 words
A method according to claim 33 further comprising: generating power ratios that indicate relative power levels for the physical channels using the physical channel power threshold levels; and transmitting these power ratios to the mobile station.
Claim 38
Dependent Claim
35 words
A method according to claim 19 wherein the SINR is determined according to E b σ n 2 wherein E b is the desired signal energy and σ n 2 is an average interference-noise power.
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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) | 2007-02-09 | 2007-08-11 | 2008-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-02-09 | 2011-08-11 | 2012-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-02-09 | 2015-08-11 | 2016-02-10 | $7700.00 | Window Closed / Lapsed |