US5881368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus of power control in a CDMA dispatch system
Assignee: Qualcomm Inc
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Filing: 1996-06-06
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Granted: 1999-03-09
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Expires: 2016-06-06
Abstract
Abstract In a dispatch system, power of the forward link broadcast channel transmitted from a base station is controlled such that the power level is the minimum necessary and such that transmission of the forward link broadcast channel is terminated if no remote unit is located within the coverage area of the base station. In addition to transmitting a forward link broadcast signal, the base station monitors an access channel. A first remote unit in the base station coverage area receives and decodes the forward link broadcast signal. The first remote unit determines a signal quality of said forward link broadcast signal. If the signal quality is unacceptable, the remote unit transmits a power request access message. The base station responds to the request by increasing the transmission power of forward link broadcast channel. If no requests are received at the base station, the forward link broadcast channel is slowly decreased to a minimum. Transmission of the forward link broadcast channel may be terminated completely.
Inventors
- 👤 Matthew S. Grob
- 👤 Yu-Dong Yao
- 👤 Eric J. Lekven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:14
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/30; H04W52/32; H04W52/322; H04W68/00; H04W68/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
63 words
A method of power control and efficient resource allocation of a base station in a dispatch system comprising the steps of: monitoring a multiple user access communication channel to detect a request for increased power; and decreasing a power level at which a forward link broadcast signal is transmitted if no request for increased power is detected during a first period of time.
Claim 2
Independent Claim
63 words
A method of power control and efficient resource allocation of a base station in a dispatch system comprising the steps of: monitoring a multiple user access communication channel to detect a request for increased power; and decreasing a power level at which a forward link broadcast signal is transmitted if no request for increased power is detected during a first period of time.
Claim 3
Dependent Claim
31 words
The method of claim 1 further comprising the step of increasing said power level at which said forward link broadcast signal is transmitted if said request for increased power is detected.
Claim 4
Dependent Claim
54 words
The method of claim 2 wherein said request for increased power comprises an indication of a signal level at which a corresponding remote unit received said forward link broadcast signal, and wherein an amount of power, by which said power level is increased in said step of increasing, is determined based on said indication.
Claim 5
Dependent Claim
27 words
The method of claim 3 wherein said indication is generated based on a frame erasure rate of a series of frames comprising said forward link broadcast signal.
Claim 6
Dependent Claim
30 words
The method of claim 3 wherein said indication is generated by measuring a signal to noise ratio of said forward link broadcast signal as received by said corresponding remote unit.
Claim 7
Dependent Claim
32 words
The method of claim 2 wherein the step of increasing said power level at which said forward link broadcast channel is transmitted is disabled if said power level reaches a maximum value.
Claim 8
Dependent Claim
38 words
The method of claim 1 further comprising the step of increasing said power level at which said forward link broadcast signal is transmitted only in response to one of two requests for increased power received in close succession.
Claim 9
Dependent Claim
32 words
The method of claim 1 wherein the step of decreasing said power level at which said forward link broadcast signal is transmitted is disabled, if said power level reaches a minimum value.
Claim 10
Dependent Claim
36 words
The method of claim 8 further comprising the step of terminating transmission of said forward link broadcast signal if said power level is equal to said minimum value for more than a second amount of time.
Claim 11
Dependent Claim
28 words
The method of claim 9 further comprising the step of resuming transmission of said forward link broadcast signal in response to a subsequently received request for increased power.
Claim 12
Independent Claim
81 words
A system for conserving base station resources in a dispatch system configured to service remote units comprising: a base station that monitors an access channel and cyclically reduces a power level of a forward link broadcast signal if no request for increased power is detected on said access channel; and a remote unit that receives said forward link broadcast signal and transmits said request for increased power if a signal level of said forward link broadcast signal crosses a threshold value.
Claim 13
Independent Claim
81 words
A system for conserving base station resources in a dispatch system configured to service remote units comprising: a base station that monitors an access channel and cyclically reduces a power level of a forward link broadcast signal if no request for increased power is detected on said access channel; and a remote unit that receives said forward link broadcast signal and transmits said request for increased power if a signal level of said forward link broadcast signal crosses a threshold value.
Claim 14
Independent Claim
72 words
An apparatus for power control and efficient resource allocation of a base station in a dispatch system comprising: means for monitoring a multiple user access communication channel; means for detecting a request for increased power over said multiple user access communication channel; and means for decreasing a power level at which a forward link broadcast signal is transmitted if no request for increased power is detected during a first period of time.
Claim 15
Independent Claim
72 words
An apparatus for power control and efficient resource allocation of a base station in a dispatch system comprising: means for monitoring a multiple user access communication channel; means for detecting a request for increased power over said multiple user access communication channel; and means for decreasing a power level at which a forward link broadcast signal is transmitted if no request for increased power is detected during a first period of time.
Claim 16
Dependent Claim
30 words
The apparatus of claim 12 further comprising means for increasing said power level at which said forward link broadcast signal is transmitted if said request for increased power is detected.
Claim 17
Dependent Claim
49 words
The apparatus of claim 13 wherein said request for increased power comprises an indication of a signal level at which a corresponding remote unit received said forward link broadcast signal and wherein an amount of power, by which said power level is increased, is determined based on said indication.
Claim 18
Dependent Claim
37 words
The apparatus of claim 12 further comprising means for increasing said power level at which said forward link broadcast signal is transmitted only in response to one of two requests for increased power received in close succession.
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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) | 2002-03-08 | 2002-09-07 | 2003-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-08 | 2006-09-07 | 2007-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-08 | 2010-09-07 | 2011-03-09 | $7700.00 | Window Closed / Lapsed |