US5893036A
Expired / Lapsed
US
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Transmission power control method
Assignee: Google Technology Holdings LLC
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Filing: 1997-01-30
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Granted: 1999-04-06
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Expires: 2017-01-30
Abstract
Abstract A transmission power control method subdivides one or more transmission power steps as defined in a system specification into multiple sub-steps. A base station (290) instructs a mobile station (280) to use a defined power step, and the mobile station (280) initially selects a maximum power sub-step within the requested power step during an initial RACH (225) transmission. During the duration of the call, the mobile station (280) dynamically adjusts the power sub-step based on measured signal reception quality and channel conditions. The result is an improvement in call completion rates with only a minor reduction in battery life.
Inventors
- 👤 Anhtuan Trandai
- 👤 Hugh Wang
- 👤 Wayne Huang
- 👤 Gang Sun
- 👤 Gregory R. Black
- 👤 James G. Haerle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:43
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/30; H04W52/36; H04W52/367; H04W52/38; H04W52/50
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
261 words
A method of transmission power control in a communication system having a mobile station transmitting to a base station, the communication system defining power steps of a mobile station as encompassing a specified range of power levels, comprising the steps of: selecting a particular power step of the mobile station; dividing the particular power step into a plurality of power sub-steps having a higher power sub-step and a lower power sub-step; assigning a unique nominal transmission power level, within the specified range of power levels encompassed by the particular power step, to each one of the plurality of power sub-steps; obtaining, at the mobile station, a command from the base station instructing the mobile station to use a certain power step; determining if the certain power step is also the particular power step; if the certain power step is also the particular power step: identifying whether a channel condition exceeds a predetermined threshold; if the channel condition exceeds the predetermined threshold: electing the higher power sub-step as said one of the plurality of power sub-steps; and if the channel condition does not exceed the predetermined threshold: electing the lower power sub-step as said one of the plurality of power sub-steps; transmitting a signal from the mobile station, at the unique nominal transmission power level assigned to said one of the plurality of power sub-steps; and if the certain power step is not also the particular power step: transmitting a signal, from the mobile station, at a power level within the specified range of power levels encompassed by the certain power step.
Claim 2
Independent Claim
261 words
A method of transmission power control in a communication system having a mobile station transmitting to a base station, the communication system defining power steps of a mobile station as encompassing a specified range of power levels, comprising the steps of: selecting a particular power step of the mobile station; dividing the particular power step into a plurality of power sub-steps having a higher power sub-step and a lower power sub-step; assigning a unique nominal transmission power level, within the specified range of power levels encompassed by the particular power step, to each one of the plurality of power sub-steps; obtaining, at the mobile station, a command from the base station instructing the mobile station to use a certain power step; determining if the certain power step is also the particular power step; if the certain power step is also the particular power step: identifying whether a channel condition exceeds a predetermined threshold; if the channel condition exceeds the predetermined threshold: electing the higher power sub-step as said one of the plurality of power sub-steps; and if the channel condition does not exceed the predetermined threshold: electing the lower power sub-step as said one of the plurality of power sub-steps; transmitting a signal from the mobile station, at the unique nominal transmission power level assigned to said one of the plurality of power sub-steps; and if the certain power step is not also the particular power step: transmitting a signal, from the mobile station, at a power level within the specified range of power levels encompassed by the certain power step.
Claim 3
Dependent Claim
16 words
The method according to claim 1 wherein the higher power sub-step is a maximum power sub-step.
Claim 4
Dependent Claim
25 words
The method according to claim 1 wherein the step of obtaining comprises the step of: receiving a Broadcast Control Channel signal from the base station.
Claim 5
Dependent Claim
25 words
The method according to claim 3 wherein the step of obtaining further comprises the step of: receiving a Paging Channel signal from the base station.
Claim 6
Dependent Claim
27 words
The method according to claim 1 wherein the step of transmitting a signal comprises the step of: sending a Random Access Channel signal from the mobile station.
Claim 7
Dependent Claim
33 words
The method according to claim 1 further comprising the step of: acquiring, at the mobile station, a further command from the base station instructing the mobile station to use a further power step.
Claim 8
Dependent Claim
25 words
The method according to claim 6 wherein the step of acquiring comprises the step of: receiving an Access Grant Channel signal from the base station.
Claim 9
Dependent Claim
26 words
The method according to claim 6 wherein the step of acquiring comprises the step of: receiving a Slow Associated Control Channel signal from the base station.
Claim 10
Dependent Claim
113 words
The method according to claim 6 further comprising the steps of: determining if the further power step is also the particular power step; if the further power step is also the particular power step: choosing one of the plurality of power sub-steps that are associated with the particular power step; transmitting a further signal, from the mobile station, at the unique nominal transmission power level assigned to said one of the plurality of power sub-steps; and if the further power step is not also the particular power step: transmitting a further signal, from the mobile station, at a power level within the specified range of power levels encompassed by the further power step.
Claim 11
Dependent Claim
27 words
The method according to claim 9 wherein the step of transmitting a further signal comprises the step of: sending a Traffic Channel signal from the mobile station.
Claim 12
Dependent Claim
15 words
The method according to claim 1 wherein the channel condition is a bit error rate.
Claim 13
Dependent Claim
15 words
The method according to claim 1 wherein the channel condition is a signal strength measurement.
Claim 14
Dependent Claim
21 words
The method according to claim 1 wherein the channel condition is a distance from the mobile station to the base station.
Claim 15
Independent Claim
279 words
A method of transmission power control in a communication system having a mobile station transmitting to a base station, the communication system defining power steps of a mobile station as encompassing a specified range of power levels, comprising the steps of: choosing a maximum power step of the mobile station as a particular power step of the mobile station; dividing the particular power step into a plurality of power sub-steps having a higher power sub-step and a lower power sub-step; assigning a unique nominal transmission power level, within the specified range of power levels encompassed by the particular power step, to each one of the plurality of power sub-steps; obtaining, at the mobile station, a command from the base station instructing the mobile station to use a certain power step; determining if the certain power step is also the particular power step; if the certain power step is also the particular power step: identifying whether a signal type of the command from the base station is a predetermined signal type; if the signal type is a predetermined signal type: electing the higher power sub-step as said one of the plurality of power sub-steps; and if the signal type is not a predetermined signal type: electing the lower power sub-step as said one of the plurality of power sub-steps; transmitting a signal, from the mobile station, at the unique nominal transmission power level assigned to said one of the plurality of power sub-steps; and if the certain power step is not also the particular power step: transmitting a signal, from the mobile station, at a power level within the specified range of power levels encompassed by the certain power step.
Claim 16
Independent Claim
279 words
A method of transmission power control in a communication system having a mobile station transmitting to a base station, the communication system defining power steps of a mobile station as encompassing a specified range of power levels, comprising the steps of: choosing a maximum power step of the mobile station as a particular power step of the mobile station; dividing the particular power step into a plurality of power sub-steps having a higher power sub-step and a lower power sub-step; assigning a unique nominal transmission power level, within the specified range of power levels encompassed by the particular power step, to each one of the plurality of power sub-steps; obtaining, at the mobile station, a command from the base station instructing the mobile station to use a certain power step; determining if the certain power step is also the particular power step; if the certain power step is also the particular power step: identifying whether a signal type of the command from the base station is a predetermined signal type; if the signal type is a predetermined signal type: electing the higher power sub-step as said one of the plurality of power sub-steps; and if the signal type is not a predetermined signal type: electing the lower power sub-step as said one of the plurality of power sub-steps; transmitting a signal, from the mobile station, at the unique nominal transmission power level assigned to said one of the plurality of power sub-steps; and if the certain power step is not also the particular power step: transmitting a signal, from the mobile station, at a power level within the specified range of power levels encompassed by the certain power step.
Claim 17
Dependent Claim
36 words
The method according to claim 14 wherein the step of dividing the particular power step comprises the step of: partitioning the particular power step into a maximum power sub-step and at least one lower power sub-step.
Claim 18
Dependent Claim
41 words
The method according to claim 15 wherein the command from the base station is a Broadcast Control Channel signal, the predetermined signal type is a Broadcast Control Channel, and the signal, from the mobile station, is a Random Access Channel 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) | 2002-04-05 | 2002-10-05 | 2003-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-05 | 2006-10-05 | 2007-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-05 | 2010-10-05 | 2011-04-06 | $7700.00 | Window Closed / Lapsed |