US8718181B2
Active / In Force
US
⏱️ 2.8 years remaining
Reverse link power control for an OFDMA system
Assignee: Qualcomm Inc
•
Filing: 2009-07-29
•
Granted: 2014-05-06
•
Expires: 2029-07-29
Abstract
Abstract Techniques for performing power control of multiple channels sent using multiple radio technologies are described. The transmit power of a reference channel, sent using a first radio technology (e.g., CDMA), is adjusted to achieve a target level of performance (e.g., a target erasure rate) for the reference channel. The transmit power of a data channel, sent using a second radio technology (e.g., OFDMA), is adjusted based on the transmit power of the reference channel. In one power control scheme, a reference power spectral density (PSD) level is determined based on the transmit power of the reference channel. A transmit PSD delta for the data channel is adjusted based on interference estimates. A transmit PSD of the data channel is determined based on the reference PSD level and the transmit PSD delta. The transmit power of the data channel is then set to achieve the transmit PSD for the data channel.
Inventors
- 👤 Aamod D. Khandekar
- 👤 Alexei Y. Gorokhov
- 👤 Arak Sutivong
- 👤 Murat Mese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:04
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/18; H04W52/24; H04W52/241; H04B; H04B17/00; H04B17/30; H04B17/391; H04L; H04L1/00; H04L1/12; H04L1/16; H04L1/18; H04W52/06; H04W52/12; H04W52/14; H04W52/146; H04W52/16; H04W52/20; H04W52/243; H04W52/247; H04W52/248; H04W52/30; H04W52/32; H04W52/325; H04W52/38; H04W52/48; H04W52/54; H04W88/00; H04W88/02; H04W88/06; H04W52/08
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
90 words
An apparatus comprising: at least one processor configured to: determine a transmit power of a reference channel, determine a reference power spectral density (PSD) level based, at least in part, on the transmit power of the reference channel and a number of subcarriers used for the reference channel, adjust a transmit power spectral density (PSD) delta, and determine a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta; and a memory coupled to the at least one processor.
Claim 2
Independent Claim
90 words
An apparatus comprising: at least one processor configured to: determine a transmit power of a reference channel, determine a reference power spectral density (PSD) level based, at least in part, on the transmit power of the reference channel and a number of subcarriers used for the reference channel, adjust a transmit power spectral density (PSD) delta, and determine a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta; and a memory coupled to the at least one processor.
Claim 3
Dependent Claim
34 words
The apparatus of claim 1 , wherein the at least one processor is configured to adjust the transmit power of the reference channel to achieve a target level of performance for the reference channel.
Claim 4
Dependent Claim
45 words
The apparatus of claim 1 , wherein the at least one processor is configured to determine transmit power of the data channel based, at least in part, on the transmit PSD of the data channel and the number of subcarriers used for the data channel.
Claim 5
Dependent Claim
37 words
The apparatus of claim 1 , wherein the at least one processor is configured to receive interference reports from base stations and to adjust the transmit PSD delta based, at least in part, on the interference reports.
Claim 6
Dependent Claim
59 words
The apparatus of claim 1 , wherein the at least one processor is configured to receive interference reports from base stations, to estimate channel gains for the base stations, and to adjust the transmit PSD delta based, at least in part, on the channel gains estimated for the base stations and the interference reports received from the base stations.
Claim 7
Dependent Claim
50 words
The apparatus of claim 1 , wherein the at least one processor is configured to decrease the transmit PSD delta if at least one neighbor base station indicates high interference, and to increase the transmit PSD delta if the at least one neighbor base station does not indicate high interference.
Claim 8
Dependent Claim
27 words
The apparatus of claim 1 , wherein the at least one processor is configured to limit the transmit PSD delta to be within a range of values.
Claim 9
Dependent Claim
38 words
The apparatus of claim 1 , wherein the at least one processor is configured to send the reference channel using Code Division Multiple Access (CDMA) and to send the data channel using Orthogonal Frequency Division Multiple Access (OFDMA).
Claim 10
Independent Claim
87 words
A method comprising, with one or more processors of a terminal in a wireless communication system: determining a transmit power of a reference channel: determining a reference power spectral density (PSD) level based, at least in part, on the transmit power of the reference channel and a number of subcarriers used for the reference channel; adjusting a transmit power spectral density (PSD) delta; and determining a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta.
Claim 11
Independent Claim
87 words
A method comprising, with one or more processors of a terminal in a wireless communication system: determining a transmit power of a reference channel: determining a reference power spectral density (PSD) level based, at least in part, on the transmit power of the reference channel and a number of subcarriers used for the reference channel; adjusting a transmit power spectral density (PSD) delta; and determining a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta.
Claim 12
Dependent Claim
56 words
The method of claim 9 , wherein the adjusting the transmit PSD delta comprises: obtaining interference reports from base stations, estimating channel gains for the base stations, and adjusting the transmit PSD delta based, at least in part, on the channel gains estimated for the base stations and the interference reports obtained from the base stations.
Claim 13
Dependent Claim
36 words
The method of claim 9 , further comprising, with a transmitter of the terminal: transmitting the reference channel using Code Division Multiple Access (CDMA), and transmitting the data channel using Orthogonal Frequency Division Multiple Access (OFDMA).
Claim 14
Independent Claim
81 words
An apparatus comprising: means for determining transmit power of a reference channel; means for determining a reference power spectral density (PSD) level based, at least in part, on the transmit power of the reference channel and a number of subcarriers used for the reference channel; means for adjusting a transmit power spectral density (PSD) delta; and means for determining a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta.
Claim 15
Independent Claim
81 words
An apparatus comprising: means for determining transmit power of a reference channel; means for determining a reference power spectral density (PSD) level based, at least in part, on the transmit power of the reference channel and a number of subcarriers used for the reference channel; means for adjusting a transmit power spectral density (PSD) delta; and means for determining a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta.
Claim 16
Dependent Claim
64 words
The apparatus of claim 12 , wherein the means for adjusting the transmit PSD delta comprises means for receiving interference reports from base stations, means for estimating channel gains for the base stations, and means for adjusting the transmit PSD delta based, at least in part, on the channel gains estimated for the base stations and the interference reports received from the base stations.
Claim 17
Dependent Claim
33 words
The apparatus of claim 12 , further-comprising: means for sending the reference channel using Code Division Multiple Access (CDMA); and means for sending the data channel using Orthogonal Frequency Division Multiple Access (OFDMA).
Claim 18
Dependent Claim
91 words
An article comprising: a processor readable media having instructions stored therein that are executable by one or more processors to: determine a transmit power of a reference channel; determine a reference power spectral density (PSD) level based, at least in part, on the transmit power of the reference channel and a number of subcarriers used for the reference channel; adjust a transmit power spectral density (PSD) delta; and determine a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta.
Claim 19
Dependent Claim
91 words
An article comprising: a processor readable media having instructions stored therein that are executable by one or more processors to: determine a transmit power of a reference channel; determine a reference power spectral density (PSD) level based, at least in part, on the transmit power of the reference channel and a number of subcarriers used for the reference channel; adjust a transmit power spectral density (PSD) delta; and determine a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta.
Claim 20
Independent Claim
90 words
An apparatus comprising: at least one processor configured to: determine a reference power spectral density (PSD) level, adjust a transmit power spectral density (PSD) delta, determine a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta, and determine a transmit power of the data channel based, at least in part, on the transmit PSD of the data channel and a number of subcarriers used for the data channel; and a memory coupled to the at least one processor.
Claim 21
Independent Claim
90 words
An apparatus comprising: at least one processor configured to: determine a reference power spectral density (PSD) level, adjust a transmit power spectral density (PSD) delta, determine a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta, and determine a transmit power of the data channel based, at least in part, on the transmit PSD of the data channel and a number of subcarriers used for the data channel; and a memory coupled to the at least one processor.
Claim 22
Dependent Claim
52 words
The apparatus of claim 16 , wherein the at least one processor is configured to determine transmit power of a reference channel and to determine the reference PSD level based, at least in part, on the transmit power of the reference channel and the number of subcarriers used for the reference channel.
Claim 23
Dependent Claim
34 words
The apparatus of claim 16 , wherein the at least one processor is configured to adjust the transmit power of the reference channel to achieve a target level of performance for the reference channel.
Claim 24
Dependent Claim
45 words
The apparatus of claim 16 , wherein the at least one processor is configured to determine transmit power of the data channel based, at least in part, on the transmit PSD of the data channel and the number of subcarriers used for the data channel.
Claim 25
Dependent Claim
37 words
The apparatus of claim 16 , wherein the at least one processor is configured to receive interference reports from base stations and to adjust the transmit PSD delta based, at least in part, on the interference reports.
Claim 26
Dependent Claim
59 words
The apparatus of claim 16 , wherein the at least one processor is configured to receive interference reports from base stations, to estimate channel gains for the base stations, and to adjust the transmit PSD delta based, at least in part, on the channel gains estimated for the base stations and the interference reports received from the base stations.
Claim 27
Dependent Claim
50 words
The apparatus of claim 16 , wherein the at least one processor is configured to decrease the transmit PSD delta if at least one neighbor base station indicates high interference, and to increase the transmit PSD delta if the at least one neighbor base station does not indicate high interference.
Claim 28
Dependent Claim
27 words
The apparatus of claim 16 , wherein the at least one processor is configured to limit the transmit PSD delta to be within a range of values.
Claim 29
Dependent Claim
38 words
The apparatus of claim 16 , wherein the at least one processor is configured to send the reference channel using Code Division Multiple Access (CDMA) and to send the data channel using Orthogonal Frequency Division Multiple Access (OFDMA).
Claim 30
Independent Claim
87 words
A method comprising, with one or more processors of a terminal in a wireless communication system: determining a reference power spectral density (PSD) level; adjusting a transmit power spectral density (PSD) delta; determining a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta; and determining a transmit power of the data channel based, at least in part, on the transmit PSD of the data channel and a number of subcarriers used for the data channel.
Claim 31
Independent Claim
87 words
A method comprising, with one or more processors of a terminal in a wireless communication system: determining a reference power spectral density (PSD) level; adjusting a transmit power spectral density (PSD) delta; determining a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta; and determining a transmit power of the data channel based, at least in part, on the transmit PSD of the data channel and a number of subcarriers used for the data channel.
Claim 32
Dependent Claim
50 words
The method of claim 25 , wherein the determining the reference PSD level comprises: determining transmit power of a reference channel, and determining the reference PSD level based, at least in part, on the transmit power of the reference channel and the number of subcarriers used for the reference channel.
Claim 33
Dependent Claim
56 words
The method of claim 25 , wherein the adjusting the transmit PSD delta comprises: obtaining interference reports from base stations; estimating channel gains for the base stations; and adjusting the transmit PSD delta based, at least in part, on the channel gains estimated for the base stations and the interference reports received from the base stations.
Claim 34
Dependent Claim
36 words
The method of claim 25 , further comprising, with a transmitter of the terminal: transmitting the reference channel using Code Division Multiple Access (CDMA); and transmitting the data channel using Orthogonal Frequency Division Multiple Access (OFDMA).
Claim 35
Independent Claim
82 words
An apparatus comprising: means for determining a reference power spectral density (PSD) level; means for adjusting a transmit power spectral density (PSD) delta; means for determining a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta; and means for determining a transmit power of the data channel based, at least in part, on the transmit PSD of the data channel and a number of subcarriers used for the data channel.
Claim 36
Independent Claim
82 words
An apparatus comprising: means for determining a reference power spectral density (PSD) level; means for adjusting a transmit power spectral density (PSD) delta; means for determining a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta; and means for determining a transmit power of the data channel based, at least in part, on the transmit PSD of the data channel and a number of subcarriers used for the data channel.
Claim 37
Dependent Claim
56 words
The apparatus of claim 29 , wherein the means for determining the reference PSD level comprises: means for determining transmit power of a reference channel, and means for determining the reference PSD level based, at least in part, on the transmit power of the reference channel and a number of subcarriers used for the reference channel.
Claim 38
Dependent Claim
64 words
The apparatus of claim 29 , wherein the means for adjusting the transmit PSD delta comprises means for receiving interference reports from base stations, means for estimating channel gains for the base stations, and means for adjusting the transmit PSD delta based, at least in part, on the channel gains estimated for the base stations and the interference reports received from the base stations.
Claim 39
Dependent Claim
34 words
The apparatus of claim 29 , further comprising: means for sending the reference channel using Code Division Multiple Access (CDMA); and means for sending the data channel using Orthogonal Frequency Division Multiple Access (OFDMA).
Claim 40
Dependent Claim
91 words
An article comprising: a processor readable media having instructions stored therein that are executable by one or more processors to: determine a reference power spectral density (PSD) level; adjust a transmit power spectral density (PSD) delta; determine a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta; and determine a transmit power of the data channel based, at least in part, on the transmit PSD of the data channel and a number of subcarriers used for the data channel.
Claim 41
Dependent Claim
91 words
An article comprising: a processor readable media having instructions stored therein that are executable by one or more processors to: determine a reference power spectral density (PSD) level; adjust a transmit power spectral density (PSD) delta; determine a transmit PSD of a data channel based, at least in part, on the reference PSD level and the transmit PSD delta; and determine a transmit power of the data channel based, at least in part, on the transmit PSD of the data channel and a number of subcarriers used for the data channel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2017-05-05 | 2017-11-04 | 2018-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2021-05-05 | 2021-11-04 | 2022-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2025-05-05 | 2025-11-04 | 2026-05-06 | $7700.00 | Window Closed / Lapsed |