US6330456B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and method to combine power control commands during soft handoff in DS/CDMA cellular systems
Assignee: Apple Inc
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Filing: 2001-05-04
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Granted: 2001-12-11
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Expires: 2021-05-04
Abstract
Abstract Mobile stations in communication with several base stations in a cellular CDMA system (as when undergoing soft handoff) do not use the conventional “or of the downs” rule for assessing power control commands from base stations. Mobile stations assess the link quality of the links from the base station. If any base station displays link quality above a predetermined threshold and if that base station is requesting power reduction, power is reduced by a predetermined amount, delta. Otherwise, power is adjusted up or down by an amount less than or equal to delta according to the received power control signals from each base station in conjunction with a weight determined from the signal quality of the link from each base station.
Inventors
- 👤 Bassam Hashem
- 👤 Norman Secord
- 👤 Wookwon Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:43
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/54; H04W52/56; H04W52/38; H04W52/40; H04W52/60; H04W24/00; H04W24/10; H04W36/00; H04W36/08; H04W36/16; H04W36/18; H04W88/00; H04W88/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
A method for combining power control commands received from a plurality of base stations, the method comprising: receiving a power control command from one of said base stations; assigning a weight to said power control command; receiving another power control command from another of said base stations; assigning another weight to said another power control command; deriving a combined power control command as a function of said assigned weight and said assigned another weight, said combined power control command is also derived as a function of said power control command and said another power control command; determining if said weight is greater than a threshold weight; wherein said function results in a 1 if: said weight is determined to be greater than a threshold weight; and said power control command has a value of 0.
Claim 2
Independent Claim
135 words
A method for combining power control commands received from a plurality of base stations, the method comprising: receiving a power control command from one of said base stations; assigning a weight to said power control command; receiving another power control command from another of said base stations; assigning another weight to said another power control command; deriving a combined power control command as a function of said assigned weight and said assigned another weight, said combined power control command is also derived as a function of said power control command and said another power control command; determining if said weight is greater than a threshold weight; wherein said function results in a 1 if: said weight is determined to be greater than a threshold weight; and said power control command has a value of 0.
Claim 3
Dependent Claim
80 words
The method according to claim 1 wherein: determining if said weight is greater than a threshold weight; and determining if said another weight is greater than said threshold weight; wherein said function results in a −1 if: said weight is determined to be greater than said threshold weight; said another weight is determined to be greater than said threshold weight; said power control command has a value of 1; and said another power control command has a value of 1.
Claim 4
Independent Claim
135 words
A method for combining power control commands received from a plurality of base stations, the method comprising: receiving a power control command from one of said base stations; assigning a weight to said power control command; receiving another power control command from another of said base stations; assigning another weight to said another power control command; deriving a combined power control command as a function of said assigned weight and said assigned another weight, said combined power control command is also derived as a function of said power control command and said another power control command; determining if said weight is greater than a threshold weight; wherein said function results in a −1 if: said weight is determined to be greater than a threshold weight; and said power control command has a value of 0.
Claim 5
Independent Claim
135 words
A method for combining power control commands received from a plurality of base stations, the method comprising: receiving a power control command from one of said base stations; assigning a weight to said power control command; receiving another power control command from another of said base stations; assigning another weight to said another power control command; deriving a combined power control command as a function of said assigned weight and said assigned another weight, said combined power control command is also derived as a function of said power control command and said another power control command; determining if said weight is greater than a threshold weight; wherein said function results in a −1 if: said weight is determined to be greater than a threshold weight; and said power control command has a value of 0.
Claim 6
Independent Claim
169 words
A method for combining power control commands received from a plurality of base stations, the method comprising: receiving a power control command from one of said base stations; assigning a weight to said power control command; receiving another power control command from another of said base stations; assigning another weight to said another power control command; deriving a combined power control command as a function of said assigned weight and said assigned another weight, said combined power control command is also derived as a function of said power control command and said another power control command; determining if said weight is greater than a threshold weight; and determining if said another weight is greater than a threshold weight; wherein said function results in a 1 if: said weight is determined to be greater than said threshold weight; said another weight is determined to be greater than said threshold weight; said power control command has a value of 1; and said another power control command has a value of 1.
Claim 7
Independent Claim
169 words
A method for combining power control commands received from a plurality of base stations, the method comprising: receiving a power control command from one of said base stations; assigning a weight to said power control command; receiving another power control command from another of said base stations; assigning another weight to said another power control command; deriving a combined power control command as a function of said assigned weight and said assigned another weight, said combined power control command is also derived as a function of said power control command and said another power control command; determining if said weight is greater than a threshold weight; and determining if said another weight is greater than a threshold weight; wherein said function results in a 1 if: said weight is determined to be greater than said threshold weight; said another weight is determined to be greater than said threshold weight; said power control command has a value of 1; and said another power control command has a value of 1.
Claim 8
Independent Claim
166 words
A method for combining power control commands received from a plurality of base stations, the method comprising: receiving a power control command from one of said base stations; assigning a weight to said power control command; receiving another power control command from another of said base stations; assigning another weight to said another power control command; deriving a combined power control command as a function of said assigned weight and said assigned another weight, said combined power control command is also derived as a function of said power control command and said another power control command; determining if said weight is less than or equal to a threshold weight; and determining if said another weight is less than or equal to said threshold weight; wherein said function results in a value between 1 and −1 if: said weight is determined to be less than or equal to said threshold weight; and said another weight is determined to be less than or equal to said threshold weight.
Claim 9
Independent Claim
166 words
A method for combining power control commands received from a plurality of base stations, the method comprising: receiving a power control command from one of said base stations; assigning a weight to said power control command; receiving another power control command from another of said base stations; assigning another weight to said another power control command; deriving a combined power control command as a function of said assigned weight and said assigned another weight, said combined power control command is also derived as a function of said power control command and said another power control command; determining if said weight is less than or equal to a threshold weight; and determining if said another weight is less than or equal to said threshold weight; wherein said function results in a value between 1 and −1 if: said weight is determined to be less than or equal to said threshold weight; and said another weight is determined to be less than or equal to said threshold weight.
Claim 10
Independent Claim
160 words
A method for combining power control commands received from a plurality of base stations, the method comprising: receiving a power control command from one of said base stations; assigning a weight to said power control command; receiving another power control command from another of said base stations; assigning another weight to said another power control command; deriving a combined power control command as a function of said assigned weight and said assigned another weight, said combined power control command is also derived as a function of said power control command and said another power control command; determining if said weight is less than a threshold weight; and determining if said another weight is less than said threshold weight; wherein said function results in a value between 1 and −1 if: said weight is determined to be less than or equal to said threshold weight; and said another weight is determined to be less than or equal to said threshold weight.
Claim 11
Independent Claim
160 words
A method for combining power control commands received from a plurality of base stations, the method comprising: receiving a power control command from one of said base stations; assigning a weight to said power control command; receiving another power control command from another of said base stations; assigning another weight to said another power control command; deriving a combined power control command as a function of said assigned weight and said assigned another weight, said combined power control command is also derived as a function of said power control command and said another power control command; determining if said weight is less than a threshold weight; and determining if said another weight is less than said threshold weight; wherein said function results in a value between 1 and −1 if: said weight is determined to be less than or equal to said threshold weight; and said another weight is determined to be less than or equal to said threshold weight.
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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) | 2004-12-10 | 2005-06-11 | 2005-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-12-10 | 2009-06-11 | 2009-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-12-10 | 2013-06-11 | 2013-12-11 | $7700.00 | Window Closed / Lapsed |