US5345598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex power control system in a communication network
Assignee: Ericsson Inc
•
Filing: 1992-04-10
•
Granted: 1994-09-06
•
Expires: 2012-04-10
Abstract
Abstract Measurements of mobile signal strength received at the base station are used to determine the portion of power that should be transmitted by the base station to a particular mobile. Each of a plurality of mobiles measure the relative strength of the base station signal specifically intended for that mobile. The relative strength is compared to either the total base station signal power or to a cumulative ranking of the power of signals intended for other mobiles. That comparison is used to determine whether the mobile should increase or decrease its power.
Inventors
- 👤 Paul W. Dent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:45
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/24; H04B7/26; H04W; H04W52/00; H04W52/04; H04W52/30; H04W52/34; H04W52/346; H04W52/38; H04W52/44
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
178 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power regulation system, comprising: each mobile including: mobile receiving means for receiving a composite signal formed from signals transmitted from said base station to all of said plurality of mobiles, each transmitted signal intended for one of said mobiles, and for determining corresponding signal strength values for each received signal in said composite signal and, means, connected to said mobile receiving means, for computing from said signal strength values a desired mobile transmitter power level, and said base station including: base station receiving means for receiving signals transmitted from said plurality of mobiles and for measuring their corresponding signal strength values, and means for modifying power levels of signal transmissions to said mobiles based on said measured signal strength values so that each of said mobile receiving means receives its intended signal with substantially equal signal quality and said base station receiving means receives said mobile transmitted signals with substantially equal signal quality.
Claim 2
Dependent Claim
178 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power regulation system, comprising: each mobile including: mobile receiving means for receiving a composite signal formed from signals transmitted from said base station to all of said plurality of mobiles, each transmitted signal intended for one of said mobiles, and for determining corresponding signal strength values for each received signal in said composite signal and, means, connected to said mobile receiving means, for computing from said signal strength values a desired mobile transmitter power level, and said base station including: base station receiving means for receiving signals transmitted from said plurality of mobiles and for measuring their corresponding signal strength values, and means for modifying power levels of signal transmissions to said mobiles based on said measured signal strength values so that each of said mobile receiving means receives its intended signal with substantially equal signal quality and said base station receiving means receives said mobile transmitted signals with substantially equal signal quality.
Claim 3
Dependent Claim
36 words
A system as described in claim 1, wherein said computing means computes said desired power level for each mobile transmitter form a relative ranking of said determined signal strength values from greatest to weakest signal strength.
Claim 4
Dependent Claim
60 words
The system according to claim 2, wherein said computing means includes: means for detecting changes in a power level of transmissions intended for said mobile based on changes in said relative ranking; means for increasing said mobile's transmitter power level when said relative ranking increases; and means for decreasing said mobile's transmitter power level when said mobile's relative ranking decreases.
Claim 5
Dependent Claim
50 words
A system as described in claim 1, wherein said computing means computes said desired power level for its respective mobile as a function of a ratio of said determined signal strength value associated with said respective mobile to a mean of said determined signal strength values associated with other mobiles.
Claim 6
Dependent Claim
56 words
A system according to claim 4, wherein said computing means includes: means for detecting changes in power levels of transmitted signal intended for said mobile based on changes in said ration; means for increasing said mobile's transmitter power level when said ratio increases; and means for decreasing said mobile's transmitter power level when said ratio decreases.
Claim 7
Dependent Claim
37 words
A system according to claim 1, wherein said computing means includes: means for storing in table form a non-linear power distribution function, and means for determining said desired power level based on said non-linear power distribution function.
Claim 8
Dependent Claim
42 words
A system according to claim 6, wherein said base station includes means for generating and transmitting a modification command; and wherein each mobile further includes mean, responsive to said modification command, for altering said storing means to adapt to said non-linear function.
Claim 9
Dependent Claim
44 words
A system according to claim 1, each mobile further comprising: transmission means for transmitting a mobile signal from said mobile, and means, connected to said computing means, for gradually altering power of said transmission means based on said computed desired mobile transmitter power level.
Claim 10
Dependent Claim
38 words
A system according to claim 1, wherein said modifying means increases power levels of signal transmissions to mobiles having relatively lesser measured signal strength values and decreases power levels to mobiles having relatively greater measured signal strength values.
Claim 11
Dependent Claim
63 words
A system as in claim 1, wherein said computing means includes: means for sorting said determined signal strength values in an order from greatest to lowest signal strength value, and means for selecting said desired mobile transmitter power level from a predetermined look-up table stored in a memory based on the position of said mobile's determined signal strength value in said sorted order.
Claim 12
Dependent Claim
22 words
A system as in claim 1, wherein said mobile and base station receiving means each include a Code Division Multiple Access receiver.
Claim 13
Dependent Claim
48 words
A system as described in claim 1, wherein said mobile receiving means is a code division multiple access demodulator (CDMA) including: subtractive CDMA demodulation means for demodulating said composite signal into a plurality of demodulated signals corresponding to said transmitted signals to each of said plurality of mobiles;
Claim 14
Dependent Claim
22 words
The system according to claim 12, wherein said ranking means includes a memory for storing said demodulated signal strengths in table format.
Claim 15
Dependent Claim
37 words
The system according to claim 12, each mobile further comprising: CDMA signal generating means, connected to said computing means, for generating coded blocks of CDMA data signals and for staggering in time transmission of said coded blocks.
Claim 16
Dependent Claim
39 words
The power control system according to claim 1, wherein each mobile includes: means for detecting periods of silence in communications from said base station to any mobile, and means for deactivating demodulation of a signal detected to be silent.
Claim 17
Dependent Claim
115 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system, comprising: each mobile having a transmitter; and said base station having means for altering base transmitter power transmitted to each mobile to produce, for each mobile, a corresponding base station transmitter power that is a desired proportion of total base transmitter power and thereby to instruct each mobile to regulate its mobile transmitter power, wherein an increase in said corresponding base station transmitter power in proportion to total base transmitter power indicates to a corresponding mobile that said corresponding mobile is to increase its mobile transmitter power.
Claim 18
Dependent Claim
115 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system, comprising: each mobile having a transmitter; and said base station having means for altering base transmitter power transmitted to each mobile to produce, for each mobile, a corresponding base station transmitter power that is a desired proportion of total base transmitter power and thereby to instruct each mobile to regulate its mobile transmitter power, wherein an increase in said corresponding base station transmitter power in proportion to total base transmitter power indicates to a corresponding mobile that said corresponding mobile is to increase its mobile transmitter power.
Claim 19
Dependent Claim
112 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system, comprising: each mobile having a transmitter; and said base station having means for altering base transmitter power transmitted to each mobile to produce, for each mobile, a corresponding base station transmitter power that is a desired proportion of total base transmitter power and thereby to instruct each mobile to regulate its mobile transmitter power, wherein said altering means includes means for determining, for each mobile, said desired proportion that will equalize signal power levels received at said base station from each of said mobile.
Claim 20
Dependent Claim
112 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system, comprising: each mobile having a transmitter; and said base station having means for altering base transmitter power transmitted to each mobile to produce, for each mobile, a corresponding base station transmitter power that is a desired proportion of total base transmitter power and thereby to instruct each mobile to regulate its mobile transmitter power, wherein said altering means includes means for determining, for each mobile, said desired proportion that will equalize signal power levels received at said base station from each of said mobile.
Claim 21
Dependent Claim
130 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system, comprising: each mobile having a transmitter; and said base station having means for altering base transmitter power transmitted to each mobile to produce, for each mobile, a corresponding base station transmitter power that is a desired proportion of total base transmitter power and thereby to instruct each mobile to regulate its mobile transmitter power, wherein each mobile further comprises: means for detecting alterations in received signal strength of a corresponding signal transmitted to said mobile in proportion to total signal strength of all signals received from said base station, and means for changing said mobile transmitter power based on said detected alternations.
Claim 22
Dependent Claim
130 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system, comprising: each mobile having a transmitter; and said base station having means for altering base transmitter power transmitted to each mobile to produce, for each mobile, a corresponding base station transmitter power that is a desired proportion of total base transmitter power and thereby to instruct each mobile to regulate its mobile transmitter power, wherein each mobile further comprises: means for detecting alterations in received signal strength of a corresponding signal transmitted to said mobile in proportion to total signal strength of all signals received from said base station, and means for changing said mobile transmitter power based on said detected alternations.
Claim 23
Dependent Claim
48 words
The power control system as in claim 18, wherein said changing means changes said mobile transmitter power as a function of a ratio of a strength value of a signal intended for said mobile to a mean of strength values of signals intended for other of said mobiles.
Claim 24
Dependent Claim
56 words
The power control system as in claim 18, wherein said detecting means includes means for ranking from greatest to least signal strength values to all signals transmitted to said mobiles and wherein said changing means increases said mobile transmitter power if its relative ranking increases and decreases said mobile transmitter power if its relative ranking decreases.
Claim 25
Dependent Claim
35 words
A system according to claim 18, said changing means including: means for storing in table form a non-linear power distribution function, and means for determining said changed mobile transmitter power based on said non-linear function.
Claim 26
Dependent Claim
39 words
A system according to claim 21, wherein said base station includes means for generating and transmitting a modification command, and wherein each mobile further includes means for modifying said storing means in each mobile to adapt said non-linear function.
Claim 27
Dependent Claim
131 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system, comprising: each mobile having a transmitter; and said base station having means for altering base transmitter power transmitted to each mobile to produce, for each mobile, a corresponding base station transmitter power that is a desired proportion of total base transmitter power and thereby to instruct each mobile to regulate its mobile transmitter power, wherein each mobile includes: a receiver; means, coupled to said receiver, for detecting periods of silence in communications from said base station to any mobile; and means, coupled to said detecting means and to aid receiver, for deactivating processing by said receiver of any signal detected to be silent.
Claim 28
Dependent Claim
131 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system, comprising: each mobile having a transmitter; and said base station having means for altering base transmitter power transmitted to each mobile to produce, for each mobile, a corresponding base station transmitter power that is a desired proportion of total base transmitter power and thereby to instruct each mobile to regulate its mobile transmitter power, wherein each mobile includes: a receiver; means, coupled to said receiver, for detecting periods of silence in communications from said base station to any mobile; and means, coupled to said detecting means and to aid receiver, for deactivating processing by said receiver of any signal detected to be silent.
Claim 29
Dependent Claim
131 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system, comprising: each mobile having a transmitter; and said base station having means for altering base transmitter power transmitted to each mobile to produce, for each mobile, a corresponding base station transmitter power that is a desired proportion of total base transmitter power and thereby to instruct each mobile to regulate its mobile transmitter power, wherein the system further comprises: means for achieving approximately the same signal-to-interference ratios at said base station for all of said mobiles, and means for regulating the power of signal transmissions from said base station to achieve approximately the same signal-to-interference ratio at each mobile from said base station.
Claim 30
Dependent Claim
131 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system, comprising: each mobile having a transmitter; and said base station having means for altering base transmitter power transmitted to each mobile to produce, for each mobile, a corresponding base station transmitter power that is a desired proportion of total base transmitter power and thereby to instruct each mobile to regulate its mobile transmitter power, wherein the system further comprises: means for achieving approximately the same signal-to-interference ratios at said base station for all of said mobiles, and means for regulating the power of signal transmissions from said base station to achieve approximately the same signal-to-interference ratio at each mobile from said base station.
Claim 31
Dependent Claim
134 words
In a communications system including at least one base station an a plurality of mobiles for communicating with said at least one base station, a power control system comprising: means for regulating the power levels of signal transmissions from said base station to achieve approximately the same signal-to-interference ratios at each mobile from said base station, and means responsive to the power levels of signal transmissions from said base station for adjusting the power level of signals transmitted from said mobiles to said base station to achieve approximately the same signal-to-interference ratios at said base station for all of said mobiles, wherein said adjusting means increases the power level of signals transmitted from said mobiles to said base station in response to an increase in power level of signal transmissions from said base station.
Claim 32
Dependent Claim
134 words
In a communications system including at least one base station an a plurality of mobiles for communicating with said at least one base station, a power control system comprising: means for regulating the power levels of signal transmissions from said base station to achieve approximately the same signal-to-interference ratios at each mobile from said base station, and means responsive to the power levels of signal transmissions from said base station for adjusting the power level of signals transmitted from said mobiles to said base station to achieve approximately the same signal-to-interference ratios at said base station for all of said mobiles, wherein said adjusting means increases the power level of signals transmitted from said mobiles to said base station in response to an increase in power level of signal transmissions from said base station.
Claim 33
Dependent Claim
138 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system comprising: means for regulating the power levels of signal transmissions from said base station to achieve approximately the same signal-to-interference ratios at each mobile from said base station, and means responsive to the power levels of signal transmissions from said base station for adjusting the power level of signals transmitted from said mobiles to said base station to achieve approximately the same signal-to-interference ratios at said base station for all of said mobiles, wherein each mobile includes: a receiver; means for detecting periods of silence in communications from said base station to any mobile; and means for deactivating processing by said mobile receiver of any signal detected to be silent.
Claim 34
Dependent Claim
138 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system comprising: means for regulating the power levels of signal transmissions from said base station to achieve approximately the same signal-to-interference ratios at each mobile from said base station, and means responsive to the power levels of signal transmissions from said base station for adjusting the power level of signals transmitted from said mobiles to said base station to achieve approximately the same signal-to-interference ratios at said base station for all of said mobiles, wherein each mobile includes: a receiver; means for detecting periods of silence in communications from said base station to any mobile; and means for deactivating processing by said mobile receiver of any signal detected to be silent.
Claim 35
Dependent Claim
170 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system comprising: means for regulating the power levels of signal transmissions from said base station to achieve approximately the same signal-to-interference ratios at each mobile from said base station, and means responsive to the power levels of signal transmissions from said base station for adjusting the power level of signals transmitted from said mobiles to said base station to achieve approximately the same signal-to-interference ratios at said base station for all of said mobiles, wherein each mobile further comprises: means for detecting signal strengths of signals transmitted from said base station intended for each mobile; and means, coupled to said signal strength detecting means, for ranking said detected signal strengths in order to relative signal strength from greatest to weakest signal strength, wherein said adjusting means adjusts the power level of signal transmissions from each mobile based on said relative signal strength ranking.
Claim 36
Dependent Claim
170 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system comprising: means for regulating the power levels of signal transmissions from said base station to achieve approximately the same signal-to-interference ratios at each mobile from said base station, and means responsive to the power levels of signal transmissions from said base station for adjusting the power level of signals transmitted from said mobiles to said base station to achieve approximately the same signal-to-interference ratios at said base station for all of said mobiles, wherein each mobile further comprises: means for detecting signal strengths of signals transmitted from said base station intended for each mobile; and means, coupled to said signal strength detecting means, for ranking said detected signal strengths in order to relative signal strength from greatest to weakest signal strength, wherein said adjusting means adjusts the power level of signal transmissions from each mobile based on said relative signal strength ranking.
Claim 37
Dependent Claim
41 words
A system according to claim 27, each mobile further comprising: transmission means for transmitting a mobile signal from said mobile, wherein said adjusting means, connected to said ranking means, gradually adjusts power of each mobile's transmitter based on said relative ranking.
Claim 38
Dependent Claim
57 words
A system according to claim 27, wherein said adjusting means increases the power level of signal transmissions from mobiles that determine its respective signal strength received from the base station to have increased, and decreases the power level of signal transmissions from mobiles that determine its respective signal strength received from said base station to have decreased.
Claim 39
Dependent Claim
58 words
A system as in claim 27, wherein said ranking means includes: mean for sorting values of said detected signal strengths in an order from greatest to lowest, and means for selecting mobile transmission power levels from a predetermined look-up table stored in a memory based on a position of a mobile's signal strength value in said sorted order.
Claim 40
Dependent Claim
136 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system comprising: means for regulating the power levels of signal transmissions from said base station to achieve approximately the same signal-to-interference ratios at each mobile from said base station, and means responsive to the power levels of signal transmissions from said base station for adjusting the power level of signals transmitted from said mobiles to said base station to achieve approximately the same signal-to-interference ratios at said base station for all of said mobiles wherein said regulating means includes means for computing a power level for each mobile as a function of a ratio of each mobile's signal strength value to a mean of other mobile's signal strength values.
Claim 41
Dependent Claim
136 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system comprising: means for regulating the power levels of signal transmissions from said base station to achieve approximately the same signal-to-interference ratios at each mobile from said base station, and means responsive to the power levels of signal transmissions from said base station for adjusting the power level of signals transmitted from said mobiles to said base station to achieve approximately the same signal-to-interference ratios at said base station for all of said mobiles wherein said regulating means includes means for computing a power level for each mobile as a function of a ratio of each mobile's signal strength value to a mean of other mobile's signal strength values.
Claim 42
Dependent Claim
129 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system comprising: means for regulating the power levels of signal transmissions from said base station to achieve approximately the same signal-to-interference ratios at each mobile from said base station, and means responsive to the power levels of signal transmissions from said base station for adjusting the power level of signals transmitted from said mobiles to said base station to achieve approximately the same signal-to-interference ratios at said base station for all of said mobiles, wherein each mobile includes: means for storing in table form a non-linear power distribution function, and means for determining a mobile transmitter power based on said non-linear function.
Claim 43
Dependent Claim
129 words
In a communications system including at least one base station and a plurality of mobiles for communicating with said at least one base station, a power control system comprising: means for regulating the power levels of signal transmissions from said base station to achieve approximately the same signal-to-interference ratios at each mobile from said base station, and means responsive to the power levels of signal transmissions from said base station for adjusting the power level of signals transmitted from said mobiles to said base station to achieve approximately the same signal-to-interference ratios at said base station for all of said mobiles, wherein each mobile includes: means for storing in table form a non-linear power distribution function, and means for determining a mobile transmitter power based on said non-linear function.
Claim 44
Dependent Claim
44 words
A system as described in claim 32, wherein said base station includes means for generating and transmitting a modification command; and wherein each mobile includes means, responsive to said modification command, for modifying said storing means in each mobile to adapt said non-linear function.
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USPTO Annuity & Maintenance Windows
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| 7.5 Years (Year 8) | 2001-09-05 | 2002-03-07 | 2002-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-05 | 2006-03-07 | 2006-09-06 | $7700.00 | Window Closed / Lapsed |