Abstract
A method and apparatus for controlling transmission power levels in a mobile communication system. The method provides for a closed-loop power control method. A mobile station provides information on the quality of the signal received from the base station and the base station responds by adjusting the power allocated to that user in a shared base station signal. The transmission power is adjusted initially by a large increment and then ramped down at an increasingly decreasing rate. The mobile station also provides information to the base station as to its relative velocity and the base station adjusts its transmission power in accordance with this velocity information.
Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
Not Available | 18/10/2001 | ISLD-200111-002 | QUALCOMM INC | No | Family Member | ||||
Not Available | 12/06/2006 | ISLD-200612-006 | QUALCOMM INC | No | Family Member | ||||
Not Available | 12/06/2006 | ISLD-200612-006 | QUALCOMM INC | Yes | Basis Patent |
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Technologies
Product
Use Cases


Services
Claim
1. A method for controlling transmission power levels, comprising:', '(a) receiving a signal from a first station at a second station; and,', '(b) adjusting a transmission power level for the signal transmitted to the second station in accordance with the quality of the received signal;', 'if the transmission power level is increased, adjusting a transmission power level for subsequently transmitted signals from the first station to the second station, comprising:', '(1) following a transmission power level increase, reducing the transmission power level at a first non-zero predetermined rate; and', '(2) reducing the transmit power level at a second non-zero predetermined rate following said first non-zero predetermined decrease if the received signal is reliably decoded, wherein the second non-zero predetermined rate is not equal to the first predetermined rate.
2. The method in accordance with claim 1, where if the transmission power level is increased in step (b), it is increased by at least 1 decibel.
3. The method in accordance with claim 2, wherein the transmission power level is increased when an increase is requested by a mobile station corresponding to the signal.
4. The method in accordance with claim 1, wherein decreases in transmission power occur at an exponentially decreasing rate.
5. The method in accordance with claim 1, wherein increases in the transmission signal power are incremental increases.
6. The method in accordance with claim 1, further consisting of the steps of:', 'signaling the first station if a transmission power level increase or decrease is needed;', 'determining if the signaled increase is needed due to a prolonged fading condition, wherein the prolonged fading condition is determined by examining patterns of a plurality of power control bits; and,', 'increasing the transmission power level only if the prolonged fading condition is present.
7. The method in accordance with claim 1, further consisting of the steps of:', 'determining if the signaled increase is needed due to a prolonged fading condition, wherein the prolonged fading condition is determined by examining patterns of a plurality of power control bits; and,', 'increasing the transmission power level only if the prolonged fading condition is present.
8. A digital signal processing apparatus comprising:', 'a storage unit;', 'a processor capable of executing commands and data to control transmission power levels by:', '(a) receiving a signal from a first station at a second station; and,', '(b) adjusting a transmission power level for the signal transmitted to the second station in accordance with the quality of the received signal;', 'if the transmission power level is increased, adjusting a transmission power level for subsequently transmitted signals from the first station to the second station, comprising:', '(1) following a transmission power level increase, reducing the transmission power level at a first non-zero predetermined rate; and', '(2) reducing the transmit power level at a second non-zero predetermined rate following said first non-zero predetermined decrease if the received signal is reliably decoded, wherein the second non-zero predetermined rate is not equal to the first predetermined rate; and', 'circuitry communicatively coupling the processor to the storage unit.
9. The apparatus in accordance with claim 8, wherein the commands and data used to control the transmission power levels further consist of the steps of:', 'signaling the first station if a transmission power level increase or decrease is needed;', 'determining if the signaled increase is needed due to a prolonged fading condition, wherein the prolonged fading condition is determined by examining patterns of a plurality of power control bits; and,', 'increasing the transmission power level only if the prolonged fading condition is present
10. The apparatus in accordance with claim 8, wherein the commands and data used to control the transmission power levels further consist of the steps of:', 'determining if the signaled increase is needed due to a prolonged fading condition, wherein the prolonged fading condition is determined by examining patterns of a plurality of power control bits; and,', 'increasing the transmission power level only if the prolonged fading condition is present
11. The apparatus in accordance with claim 10, wherein the commands and data used to control the transmission power levels further consist of the step of:', 'determining a velocity of the first station;', 'using the velocity of the first station at the second station to determine an anticipatory power adjustment; and', 'making a transmission power level increase or decrease prior to receiving the signal from the first station
12. The apparatus in accordance with claim 8, wherein the second station includes a motion sensor, and wherein the motion sensor is used to determine if transmission power level increase needs to be increased
13. The method in accordance with claim 8, wherein the second station includes a sensor to determine any shift in the received signal from the first station, and wherein the shift in the received signal is used to determine if the transmission power level needs to be increased
14. The method in accordance with claim 8, wherein the second station includes a sensor to determine selected changes in the signal received from the first station, and wherein a change in the received signal is used to determine if the transmission power level needs to be increased
15. The method in accordance with claim 10, wherein the second station includes a sensor to determine changes in relative velocity of the stations by measuring the Doppler shift in a received pilot signal, and wherein the Doppler shift is used to determine if the transmission power level needs to be increased
16. A digital signal processing apparatus comprising:', 'a storage means for storing digital data and commands;', 'a processor means capable of executing commands and data to control transmission power levels by:', '(a) receiving a signal from a first station at a second station; and,', '(b) adjusting a transmission power level for the signal transmitted to the second station in accordance with the quality of the received signal;', 'if the transmission power level is increased, adjusting a transmission power level for subsequently transmitted signals from the first station to the second station, comprising:', '(1) following a transmission power level increase, reducing the transmission power level at a first non-zero predetermined rate; and', '(2) reducing the transmit power level at a second non-zero predetermined rate following said first non-zero predetermined decrease if the received signal is reliably decoded, wherein the second non-zero predetermined rate is not equal to the first predetermined rate; and', 'circuitry means communicatively coupling the processor to the storage unit
17. The apparatus in accordance with claim 16, wherein the commands and data executed by the processor means to control the transmission power levels further consist of:', 'signaling the first station if a transmission power level increase or decrease is needed;', 'determining if the signaled increase is needed due to a prolonged fading condition, wherein the prolonged fading condition is determined by examining patterns of a plurality of power control bits; and,', 'increasing the transmission power level only if the prolonged fading condition is present
18. The apparatus in accordance with claim 16, wherein the commands and data executed by the processor means to control the transmission power levels further consist of:', 'determining if the signaled increase is needed due to a prolonged fading condition, wherein the prolonged fading condition is determined by examining patterns of a plurality of power control bits; and,', 'increasing the transmission power level only if the prolonged fading condition is present
19. The apparatus in accordance with claim 18, wherein the commands and data executed by the processor means to control the transmission power levels further consist of:', 'determining a velocity of the first station;', 'using the velocity of the first station at the second station to determine an anticipatory power adjustment; and', 'making a transmission power level increase or decrease prior to receiving the signal from the first station.']
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SUMMARY
ClaimChart-US6317587B1-STO
Patent number:US6317587B1
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
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