US5933787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for performing handoff between sectors of a common base station
Assignee: Qualcomm Inc
•
Filing: 1996-12-11
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Granted: 1999-08-03
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Expires: 2016-12-11
Abstract
Abstract A method and apparatus providing softer handoff of a mobile unit between sectors of a common base station. A sectorized base station comprises a set of demodulation elements. Each demodulation element may be assigned to a signal from one of a plurality of sectors. The output of the demodulators are combined before the decoding process independent of the sector from which the data originated. This configuration provides improved output data reliability, more stable power control, and more efficient use of resources at the base station.
Inventors
- 👤 Klein S. Gilhousen
- 👤 Roberto Padovani
- 👤 Lindsay A. Weaver, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:18
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/38; H04W52/40; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/0491; H04W16/00; H04W16/24; H04W36/00; H04W36/0005; H04W36/0055; H04W36/0069; H04W36/00692
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
211 words
A base station having a base station transceiver system for receiving at least two reverse link radio frequency signals transmitted across a single frequency band by a mobile unit located within a cell associated with said base station, the mobile unit simultaneously transmitting the reverse link radio frequency signals to at least first and second sectors within the base station during a handoff between said first and second sectors, said base station transceiver system comprising: first and second receive processing systems, said first and second receive processing systems each simultaneously receiving one of said at least two reverse link signals from said mobile unit, said first receive processing system being assigned to said first sector of said base station, said second receive processing system being assigned to said second sector of said base station; an interface port that selectively couples each of said first and second receive processing systems to one of first and second demodulation elements during said handoff, each of said demodulation elements being capable of simultaneously demodulating a processed signal received from either of said first and second receive processing systems during said handoff; and a combiner for combining each demodulated signal from said first and second demodulation elements to create a summed demodulated signal during said handoff.
Claim 2
Dependent Claim
211 words
A base station having a base station transceiver system for receiving at least two reverse link radio frequency signals transmitted across a single frequency band by a mobile unit located within a cell associated with said base station, the mobile unit simultaneously transmitting the reverse link radio frequency signals to at least first and second sectors within the base station during a handoff between said first and second sectors, said base station transceiver system comprising: first and second receive processing systems, said first and second receive processing systems each simultaneously receiving one of said at least two reverse link signals from said mobile unit, said first receive processing system being assigned to said first sector of said base station, said second receive processing system being assigned to said second sector of said base station; an interface port that selectively couples each of said first and second receive processing systems to one of first and second demodulation elements during said handoff, each of said demodulation elements being capable of simultaneously demodulating a processed signal received from either of said first and second receive processing systems during said handoff; and a combiner for combining each demodulated signal from said first and second demodulation elements to create a summed demodulated signal during said handoff.
Claim 3
Dependent Claim
18 words
The base station transceiver system of claim 1 further comprising: a decoder for decoding said summed demodulated signal.
Claim 4
Dependent Claim
199 words
A base station having a base station transceiver system for receiving at least two reverse link radio frequency signals transmitted across a single frequency band by a mobile unit located within a cell associated with said base station, the mobile unit simultaneously transmitting the reverse link radio frequency signals to at least first and second sectors within the base station between said first and second sectors, said base station transceiver system comprising: first and second receive processing systems, said first and second receive processing systems each simultaneously receiving one of said at least two reverse link signals from said mobile unit, said first receive processing system being assigned to said first sector of said base station, said second receive processing system being assigned to said second sector of said base station; an interface port that selectively couples each of said first and second receive processing systems to one of first and second demodulation elements, each of said demodulation elements being capable of simultaneously demodulating a processed signal received from either of said first and second receive processing systems; and a combiner for combining each demodulated signal from said first and second demodulation elements to create a summed demodulated signal.
Claim 5
Dependent Claim
199 words
A base station having a base station transceiver system for receiving at least two reverse link radio frequency signals transmitted across a single frequency band by a mobile unit located within a cell associated with said base station, the mobile unit simultaneously transmitting the reverse link radio frequency signals to at least first and second sectors within the base station between said first and second sectors, said base station transceiver system comprising: first and second receive processing systems, said first and second receive processing systems each simultaneously receiving one of said at least two reverse link signals from said mobile unit, said first receive processing system being assigned to said first sector of said base station, said second receive processing system being assigned to said second sector of said base station; an interface port that selectively couples each of said first and second receive processing systems to one of first and second demodulation elements, each of said demodulation elements being capable of simultaneously demodulating a processed signal received from either of said first and second receive processing systems; and a combiner for combining each demodulated signal from said first and second demodulation elements to create a summed demodulated signal.
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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) | 2002-08-02 | 2003-02-01 | 2003-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-02 | 2007-02-01 | 2007-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-02 | 2011-02-01 | 2011-08-03 | $7700.00 | Window Closed / Lapsed |