US5220678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for adjusting the power of a transmitter
Assignee: Motorola Solutions Inc
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Filing: 1991-08-12
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Granted: 1993-06-15
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Expires: 2011-08-12
Abstract
Abstract A subscriber unit (200) adjusts transmitter power during a subscriber call by transmitting a first message at a first power level (10) that decreases (80) to a second minimum required power level (60) within a predetermined duration to a second subscriber unit (300), receiving a reply message from the second subscriber unit, the reply message including a code representing a desired transmitting signal strength (20) of the first subscriber unit as determined by the second subscriber unit based on the predetermined duration (70) and the second minimum required power level (20), determining a value representing the desired transmitting signal strength of the first subscriber unit of the reply message, adjusting the power level based on the value representing the desired transmitting signal strength, and then transmitting a second message at the desired transmitting signal strength to the second subscriber.
Inventors
- 👤 Loh J. Feei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:54
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/38; H04W52/50
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
89 words
A method for adjusting the power of a transmitter during a subscriber call, comprising the steps of: at a first subscriber unit: (a) transmitting a decreasing RF power signal starting at a given maximum level for a predetermined duration; (b) receiving a second subscriber unit's acknowledgment; at the second subscriber unit: (a) monitoring the first subscriber unit's RF power signal; (b) determining when the first subscriber unit's RF power signal level drops to a minimum required level for reliable communication; (c) transmitting an acknowledgment to the first subscriber unit.
Claim 2
Independent Claim
89 words
A method for adjusting the power of a transmitter during a subscriber call, comprising the steps of: at a first subscriber unit: (a) transmitting a decreasing RF power signal starting at a given maximum level for a predetermined duration; (b) receiving a second subscriber unit's acknowledgment; at the second subscriber unit: (a) monitoring the first subscriber unit's RF power signal; (b) determining when the first subscriber unit's RF power signal level drops to a minimum required level for reliable communication; (c) transmitting an acknowledgment to the first subscriber unit.
Claim 3
Dependent Claim
27 words
The method for adjusting the power of a transmitter during a subscriber call of claim 1, wherein said decreasing RF power signal is a fixed linear signal.
Claim 4
Dependent Claim
27 words
The method for adjusting the power of a transmitter during a subscriber call of claim 1, wherein said decreasing RF power signal is a fixed non-linear signal.
Claim 5
Dependent Claim
58 words
The method for adjusting the power of a transmitter during a subscriber call of claim 1, wherein said second subscriber unit's acknowledgment to the first subscriber comprises information calculating the minimum required level based on the time between the maximum level and the point where the first subscriber unit's RF signal drops below an unacceptable level for transmission.
Claim 6
Dependent Claim
55 words
The method for adjusting the power of a transmitter during a subscriber call of claim 1, wherein said second subscriber unit's acknowledgment to the first subscriber comprises information calculating the minimum required level based on the maximum level of the first subscriber unit's RF signal and the slope of the first subscriber unit's RF signal.
Claim 7
Dependent Claim
43 words
The method for adjusting the power of a transmitter during a subscriber call of claim 1, wherein the method comprises, at the first subscriber unit, the further step of: (c) adjusting the RF power signal in accordance with the second subscriber unit's acknowledgment.
Claim 8
Dependent Claim
43 words
The method for adjusting the power of a transmitter during a subscriber call of claim 1, wherein the method comprises, at the second subscriber unit, the further step of: (d) adjusting the RF power signal in accordance with the second subscriber unit's acknowledgment.
Claim 9
Dependent Claim
29 words
The method for adjusting the power of a transmitter during a subscriber call of claim 1, wherein the first subscriber unit transmits a trailing identification code before step (a).
Claim 10
Independent Claim
198 words
A method for adjusting the power of a transmitter during a subscriber call, comprising the steps of: at a first subscriber unit: (a) transmitting a first message at a first power level that decreases to a second minimum required power level within a predetermined duration to a second subscriber unit; (b) receiving a reply message from said second subscriber unit, said reply message including a code representing a desired transmitting signal strength of the first subscriber unit as determined by said second subscriber unit; (c) determining a value representing the desired transmitting signal strength of the first subscriber unit of said reply message; (d) adjusting the power level based on the value representing the desired transmitting signal strength; (e) transmitting a second message at the desired transmitting signal strength to said second subscriber; at said second subscriber unit: (a) receiving said first message from said first subscriber unit; (b) determining a code representing the desired transmitting signal strength of the first subscriber unit; (c) transmitting said reply message to said first subscriber unit, said reply message including the desired transmitting signal strength of the first subscriber unit; and, (d) receiving said second message from said first subscriber unit.
Claim 11
Independent Claim
198 words
A method for adjusting the power of a transmitter during a subscriber call, comprising the steps of: at a first subscriber unit: (a) transmitting a first message at a first power level that decreases to a second minimum required power level within a predetermined duration to a second subscriber unit; (b) receiving a reply message from said second subscriber unit, said reply message including a code representing a desired transmitting signal strength of the first subscriber unit as determined by said second subscriber unit; (c) determining a value representing the desired transmitting signal strength of the first subscriber unit of said reply message; (d) adjusting the power level based on the value representing the desired transmitting signal strength; (e) transmitting a second message at the desired transmitting signal strength to said second subscriber; at said second subscriber unit: (a) receiving said first message from said first subscriber unit; (b) determining a code representing the desired transmitting signal strength of the first subscriber unit; (c) transmitting said reply message to said first subscriber unit, said reply message including the desired transmitting signal strength of the first subscriber unit; and, (d) receiving said second message from said first subscriber unit.
Claim 12
Dependent Claim
25 words
The method for adjusting the power of a transmitter during a subscriber call of claim 9, wherein said first message is a fixed linear signal.
Claim 13
Dependent Claim
25 words
The method for adjusting the power of a transmitter during a subscriber call of claim 9, wherein said first message is a fixed non-linear signal.
Claim 14
Dependent Claim
58 words
The method for adjusting the power of a transmitter during a subscriber call of claim 9, wherein said second subscriber unit's reply to the first subscriber comprises information calculating the minimum required level based on the time between the maximum level and the point where the first subscriber unit's RF signal drops below an unacceptable level for transmission.
Claim 15
Dependent Claim
55 words
The method for adjusting the power of a transmitter during a subscriber call of claim 9, wherein said second subscriber unit's reply to the first subscriber comprises information calculating the minimum required level based on the maximum level of the first subscriber unit's RF signal and the slope of the first subscriber unit's RF signal.
Claim 16
Dependent Claim
29 words
The method for adjusting the power of a transmitter during a subscriber call of claim 9, wherein the first subscriber unit transmits a trailing identification code before step (a).
Claim 17
Dependent Claim
129 words
A subscriber unit capable of adjusting transmitter power during a subscriber call, comprising: means for transmitting a first message at a first power level that decreases to a second minimum required power level within a predetermined duration to a second subscriber unit; means for receiving a reply message from said second subscriber unit, said reply message including a code representing a desired transmitting signal strength of the first subscriber unit as determined by said second subscriber unit; means for determining a value representing the desired transmitting signal strength of the first subscriber unit of said reply message; means for adjusting the power level based on the value representing the desired transmitting signal strength; means for transmitting a second message at the desired transmitting signal strength to said second subscriber.
Claim 18
Dependent Claim
129 words
A subscriber unit capable of adjusting transmitter power during a subscriber call, comprising: means for transmitting a first message at a first power level that decreases to a second minimum required power level within a predetermined duration to a second subscriber unit; means for receiving a reply message from said second subscriber unit, said reply message including a code representing a desired transmitting signal strength of the first subscriber unit as determined by said second subscriber unit; means for determining a value representing the desired transmitting signal strength of the first subscriber unit of said reply message; means for adjusting the power level based on the value representing the desired transmitting signal strength; means for transmitting a second message at the desired transmitting signal strength to said second subscriber.
Claim 19
Dependent Claim
15 words
The subscriber unit of claim 15, wherein said first message is a fixed linear signal.
Claim 20
Dependent Claim
15 words
The subscriber unit of claim 15, wherein said first message is a fixed non-linear signal.
Claim 21
Dependent Claim
49 words
The subscriber unit of claim 15, wherein said second subscriber unit's reply message to the first subscriber comprises information calculating the minimum required level based on the time between the maximum level and the point where the first subscriber unit's RF signal drops below an unacceptable level for transmission.
Claim 22
Dependent Claim
45 words
The subscriber unit of claim 15, wherein said second subscriber unit's reply to the first subscriber comprises information calculating the minimum required level based on the maximum level of the first subscriber unit's RF signal and the slope of the first subscriber unit's RF signal.
Claim 23
Dependent Claim
22 words
The subscriber unit of claim 15, wherein the means for transmitting a first message includes the transmission of a trailing identification code.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |