US6085108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified downlink power control during macrodiversity
Assignee: IDTP Holdings Inc
•
Filing: 1998-04-09
•
Granted: 2000-07-04
•
Expires: 2018-04-09
Abstract
Abstract The power levels of signals transmitted by base stations in a communication are controlled. Power level control commands are transmitted from a remote station to base stations from which the remote station receives signals to control the power levels of the signals transmitted by the base stations. A determination is made whether the remote station simultaneously receives a first signal from a first base station and at least one second signal from at least one second base station that include substantially identical message information. The first and second base stations transmit first and second reports of power levels of the first and second signals, respectively, to the controller. The controller compares the first and second reports and transmits first and second commands for adjusting the power levels of the first and second signals to the first and second base stations, respectively. The power level control commands are transmitted from the remote station to the base stations less frequently during macrodiversity to reduce the signalling requirements between the controller and the base stations. Also, the step size of the adjustment of the power levels of the first and second signals by the controller is reduced during macrodiversity to reduce the signalling requirements. This power control method is particularly beneficial for a CDMA system.
Inventors
- 👤 Jens Knutsson
- 👤 Magnus Persson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:36
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/022; H04W; H04W52/00; H04W52/04; H04W52/38; H04W52/40; H04W52/30; H04W52/36
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
252 words
A method of controlling power levels of signals transmitted by base stations in a communication system having base stations and remote stations, comprising the steps of: transmitting power level control commands from a remote station to the base stations from which the remote station is receiving signals, to control the power levels of the signals transmitted by the base stations; determining whether the remote station is simultaneously receiving a first signal transmitted by a first base station and at least one second signal transmitted by at least one second base station that include substantially identical message information; transmitting to a controller from the first base station a first report of a power level of the first signal; transmitting to the controller from the at least one second base station at least one second report of a power level of the at least one second signal; comparing in the controller the first report and the at least one second report; transmitting from the controller to the first base station a first command for adjusting the power level of the first signal; and transmitting from the controller to the at least one second base station at least one second command for adjusting the power level of the at least one second signal, wherein the power level control commands are transmitted less frequently from the remote station to the base stations when the remote station receives signals from more than one base station than when the remote station receives signals from only one base station.
Claim 2
Independent Claim
252 words
A method of controlling power levels of signals transmitted by base stations in a communication system having base stations and remote stations, comprising the steps of: transmitting power level control commands from a remote station to the base stations from which the remote station is receiving signals, to control the power levels of the signals transmitted by the base stations; determining whether the remote station is simultaneously receiving a first signal transmitted by a first base station and at least one second signal transmitted by at least one second base station that include substantially identical message information; transmitting to a controller from the first base station a first report of a power level of the first signal; transmitting to the controller from the at least one second base station at least one second report of a power level of the at least one second signal; comparing in the controller the first report and the at least one second report; transmitting from the controller to the first base station a first command for adjusting the power level of the first signal; and transmitting from the controller to the at least one second base station at least one second command for adjusting the power level of the at least one second signal, wherein the power level control commands are transmitted less frequently from the remote station to the base stations when the remote station receives signals from more than one base station than when the remote station receives signals from only one base station.
Claim 3
Dependent Claim
36 words
The method of claim 1, wherein the same power level control commands are transmitted several times from the remote station to the base stations when the remote station receives signals from more than one base station.
Claim 4
Dependent Claim
44 words
The method of claim 1, wherein more redundancy is encoded into the power level control commands transmitted from the remote station when the remote station receives signals from more than one base station than when the remote station receives signals from one base station.
Claim 5
Dependent Claim
27 words
The method of claim 1, wherein the power level control commands transmitted from the remote station are specific to the base stations to which they are transmitted.
Claim 6
Dependent Claim
43 words
The method of claim 1, wherein a step size of the power level adjustment by the controller is set lower when the remote station receives signals from more than one base station than when the remote station receives signals from one base station.
Claim 7
Dependent Claim
17 words
The method of claim 1, wherein the communication system is a Code Division Multiple Access (CDMA) system.
Claim 8
Independent Claim
249 words
A method of controlling power levels of signals transmitted by base stations in a communication system having base stations and remote stations, comprising the steps of: transmitting power level control commands from the remote station to the base stations from which the remote station is receiving signals, to control the power levels of the signals transmitted by the base stations; determining whether the remote station is simultaneously receiving a first signal transmitted by a first base station and at least one second signal transmitted by at least one second base station that include substantially identical message information; transmitting to a controller from the first base station a first report of a power level of the first signal; transmitting to the controller from the at least one second base station at least one second report of a power level of the at least one second signal; comparing in the controller the first report and the at least one second report; transmitting from the controller to the first base station a first command for adjusting the power level of the first signal; and transmitting from the controller to the at least one second base station at least one second command for adjusting the power level of the at least one second signal, wherein a step size of the power level adjustment by the controller is set lower when the remote station receives signals from more than one base station than when the remote station receives signals from only one base station.
Claim 9
Independent Claim
249 words
A method of controlling power levels of signals transmitted by base stations in a communication system having base stations and remote stations, comprising the steps of: transmitting power level control commands from the remote station to the base stations from which the remote station is receiving signals, to control the power levels of the signals transmitted by the base stations; determining whether the remote station is simultaneously receiving a first signal transmitted by a first base station and at least one second signal transmitted by at least one second base station that include substantially identical message information; transmitting to a controller from the first base station a first report of a power level of the first signal; transmitting to the controller from the at least one second base station at least one second report of a power level of the at least one second signal; comparing in the controller the first report and the at least one second report; transmitting from the controller to the first base station a first command for adjusting the power level of the first signal; and transmitting from the controller to the at least one second base station at least one second command for adjusting the power level of the at least one second signal, wherein a step size of the power level adjustment by the controller is set lower when the remote station receives signals from more than one base station than when the remote station receives signals from only one base station.
Claim 10
Dependent Claim
47 words
The method of claim 7, wherein the power level control commands are transmitted less frequently from the remote station to the base stations when the remote station receives signals from more than one base station than when the remote station receives signals from only one base station.
Claim 11
Dependent Claim
36 words
The method of claim 8, wherein the same power level control commands are transmitted several times from the remote station to the base stations, when the remote station receives signals from more than one base station.
Claim 12
Dependent Claim
44 words
The method of claim 8, wherein more redundancy is encoded into the power level control commands transmitted from the remote station when the remote station receives signals from more than one base station than when the remote station receives signals from one base station.
Claim 13
Dependent Claim
27 words
The method of claim 8, wherein the power level control commands transmitted from the remote station are specific to the base stations to which they are transmitted.
Claim 14
Dependent Claim
17 words
The method of claim 7, wherein the communication system is a Code Division Multiple Access (CDMA) system.
References Cited (Backward Citations)
US5109528A
Cited
US5327577A
Cited
WO1992021196A1
Cited
EP0577322A1
Cited
WO1995008901A1
Cited
EP0645940A1
Cited
WO1995012297A1
Cited
EP0680160A2
Cited
EP0682417A2
Cited
WO1997008911A1
Cited
EP0809365A1
Cited
US5982760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-07-04 | 2004-01-03 | 2004-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-07-04 | 2008-01-03 | 2008-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-07-04 | 2012-01-03 | 2012-07-04 | $7700.00 | Window Closed / Lapsed |