US6370157B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic frequency control for a cellular base station
Assignee: Nokia of America Corp
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Filing: 1997-04-30
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Granted: 2002-04-09
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Expires: 2017-04-30
Abstract
Abstract A method for automatic frequency control in a wireless communication network having public frequency channels comprises the steps of: scanning the public frequency channels; locking the cellular base station to a signal on one of the public frequency channels; and returning the cellular base station to normal operation.
Inventors
- 👤 Joseph Boccuzzi
- 👤 Winston Hong Lieu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:32
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
184 words
In a wireless communication environment wherein a first base station for a first wireless communications system, is operated within a coverage area of a second base station for a second wireless communications system, and wherein signals transmitted from said second base station are maintained at a predetermined frequency tolerance, a method for automatic frequency control for signals generated by said first base station comprising the steps of: causing a receiving device at said first base station to periodically scan said signals from said second base station; locking the first base station to a frequency of one of said second base station signals; adjusting a carrier frequency of said first base station to said locked second base station frequency; returning the first base station to normal operation, wherein said normal operation is operation within said first wireless communication systems; wherein the step of locking further comprises the step of deriving a carrier frequency reference from the locked second base station frequency; and further comprising the step of adjusting a carrier frequency of said first base station as a function of said derived carrier frequency reference.
Claim 2
Dependent Claim
184 words
In a wireless communication environment wherein a first base station for a first wireless communications system, is operated within a coverage area of a second base station for a second wireless communications system, and wherein signals transmitted from said second base station are maintained at a predetermined frequency tolerance, a method for automatic frequency control for signals generated by said first base station comprising the steps of: causing a receiving device at said first base station to periodically scan said signals from said second base station; locking the first base station to a frequency of one of said second base station signals; adjusting a carrier frequency of said first base station to said locked second base station frequency; returning the first base station to normal operation, wherein said normal operation is operation within said first wireless communication systems; wherein the step of locking further comprises the step of deriving a carrier frequency reference from the locked second base station frequency; and further comprising the step of adjusting a carrier frequency of said first base station as a function of said derived carrier frequency reference.
Claim 3
Dependent Claim
182 words
In a wireless communication network having a base station transmitting signals on a set of frequency channels, wherein transmitted frequencies of said frequency channels are maintained within a predetermined frequency tolerance, a method for automatic frequency control of a personal base station operated within a coverage area of said network base station, the method comprising the steps of: causing a receiving device at said personal base station to periodically scan said transmitted signals from said network base station; locking the personal base station to a frequency of one of said network base station signals; adjusting a carrier frequency of said personal base station to said locked network base station frequency; returning the personal base station to normal operation, wherein said normal operation is operation within said set of frequency channels; wherein the step of locking further comprises the step of deriving a carrier frequency reference from said frequency of said one of said network base station signals; and further comprising the step of adjusting a carrier frequency reference of the personal base station as a function of said derived carrier frequency reference.
Claim 4
Dependent Claim
182 words
In a wireless communication network having a base station transmitting signals on a set of frequency channels, wherein transmitted frequencies of said frequency channels are maintained within a predetermined frequency tolerance, a method for automatic frequency control of a personal base station operated within a coverage area of said network base station, the method comprising the steps of: causing a receiving device at said personal base station to periodically scan said transmitted signals from said network base station; locking the personal base station to a frequency of one of said network base station signals; adjusting a carrier frequency of said personal base station to said locked network base station frequency; returning the personal base station to normal operation, wherein said normal operation is operation within said set of frequency channels; wherein the step of locking further comprises the step of deriving a carrier frequency reference from said frequency of said one of said network base station signals; and further comprising the step of adjusting a carrier frequency reference of the personal base station as a function of said derived carrier frequency reference.
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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) | 2005-04-08 | 2005-10-08 | 2006-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-04-08 | 2009-10-08 | 2010-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-04-08 | 2013-10-08 | 2014-04-09 | $7700.00 | Window Closed / Lapsed |