US6728292B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined closed loop/open loop power control in a time division duplex communication system
Assignee: Intel Corp
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Filing: 2003-06-11
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Granted: 2004-04-27
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Expires: 2023-06-11
Abstract
Abstract A spread spectrum time division duplex user equipment uses frames having time slots for communication. The user equipment receives power commands and a first communication having a transmission power level in a first time slot. A power level of the first communication is measured as received. A pathloss estimate is determined based on in part the measured received first communication power level and the first communication transmission power level. A transmission power level for the second communication in a second time slot form the user equipment is set based on in part the pathloss estimate weighted by a quality factor adjusted by the power command. The quality factor decreases as a number of time slots between the first and second time slots increases.
Inventors
- 👤 Ariela Zeira
- 👤 Faith M. Ozluturk
- 👤 Sung-Hyuk Shin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:30
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/18; H04W52/26; H04W52/265; H04W52/06; H04W52/08; H04W52/10; H04W52/24; H04W52/54; H04W52/60; H04B; H04B2201/00; H04B2201/69; H04B2201/707; H04B2201/7097; H04B2201/709709; H04W52/241; H04W52/242; H04W52/248
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
A spread spectrum time division duplex user equipment, the user equipment using frames with time slots for communication, receiving power commands and receiving a first communication having a transmission power level in a first time slot, measuring a power level of the first communication as received and determining a pathloss estimate based on in part the measured received first communication power level and the first communication transmission power level, the user equipment comprising: means for setting a transmission power level for a second communication in a second time slot from the user equipment based on in part the pathloss estimate weighted by a quality factor adjusted by the power commands, wherein the quality factor decreases as a number of time slots between the first and second time slots increases; and means for determining the quality factor, α, of the pathloss estimate based on in part a number of time slots, D, between the first and second time slot.
Claim 2
Dependent Claim
158 words
A spread spectrum time division duplex user equipment, the user equipment using frames with time slots for communication, receiving power commands and receiving a first communication having a transmission power level in a first time slot, measuring a power level of the first communication as received and determining a pathloss estimate based on in part the measured received first communication power level and the first communication transmission power level, the user equipment comprising: means for setting a transmission power level for a second communication in a second time slot from the user equipment based on in part the pathloss estimate weighted by a quality factor adjusted by the power commands, wherein the quality factor decreases as a number of time slots between the first and second time slots increases; and means for determining the quality factor, α, of the pathloss estimate based on in part a number of time slots, D, between the first and second time slot.
Claim 3
Dependent Claim
30 words
The user equipment of claim 1 wherein a maximum time slot delay is D max and the determined quality factor, α, is determined by α=1−( D −1)/ D max .
Claim 4
Dependent Claim
64 words
The user equipment of claim 1 wherein the setting means sets the transmission power level based on in part a desired received power level, a closed loop factor and an open loop factor, the closed loop factor is based on in part the received power commands and the open loop factor is based on in part the pathloss estimate weighted by the quality factor.
Claim 5
Dependent Claim
60 words
The user equipment of claim 1 wherein the setting means sets the transmission power level based on in part a desired received power level at the first station and a combined closed loop/open loop factor, the combined closed loop/open loop factor is based on in part the received power commands and the path loss estimate weighted by the quality factor.
Claim 6
Dependent Claim
18 words
The user equipment of claim 3 wherein the closed loop factor is updated for each received power command.
Claim 7
Dependent Claim
17 words
The user equipment of claim 4 wherein the combined factor is updated for each received power command.
Claim 8
Dependent Claim
28 words
The user equipment of claim 3 wherein the desired received power level is based on in part a target signal to interference ratio and a measured interference level.
Claim 9
Dependent Claim
28 words
The user equipment of claim 4 wherein the desired received power level is based on in part a target signal to interference ratio and a measured interference level.
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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) | 2007-04-27 | 2007-10-27 | 2008-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-04-27 | 2011-10-27 | 2012-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-04-27 | 2015-10-27 | 2016-04-27 | $7700.00 | Window Closed / Lapsed |