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US 5,475,861 AGranted
Method for controlling transmission power in a communication system
AssigneeMotorola, Inc.
InventorScott M. Hall
Life of this patent
Estimating the term…
Abstract
The transmit power margin of frame error rate for each subscriber in the system is measured to determine if any "bad" subscribers, those subscribers with transmit power margins of frame error rates that cross a threshold, are in the system. If the system is under capacity, the threshold level is set to the first threshold and the signal-to-noise ratio is incremented. If the system is at marginal capacity, the threshold transmit power margin is set to a second threshold and the system is closed to new calls. If the system is over capacity: the threshold transmit power margin is set to a second threshold; the system is closed to new calls; and the signal-to-noise ratio is decremented.
Claims42
A method for controlling a threshold signal characteristic of a communication system having a base site, said method comprising the steps of:
- determining a signal characteristic for each of a plurality of subscriber units in said communication system;
- determining if said signal characteristic of any of said plurality of subscriber units is below said threshold signal characteristic;
- determining a capacity of said communication system;
- setting said threshold signal characteristic at said base site to a first threshold if said capacity of said communication system is an under capacity and incrementing a signal-to-noise threshold level if said signal characteristic of at least one of said plurality of subscriber units is below said threshold signal characteristic;
- setting said threshold signal characteristic at said base site to a second threshold if said capacity of said communication system is a marginal capacity;
- and
- setting said threshold signal characteristic at said base site to a third threshold if said capacity of said communication system is not said under capacity or said marginal capacity.
4 more elements
A method for controlling a threshold signal characteristic of a communication system having a base site, said method comprising the steps of:
- determining a transmit power margin for each of a plurality of subscriber units in said communication system;
- creating a list of said plurality of subscriber units whose transmit power margin fails to meet said threshold transmit power margin;
- assigning each of said plurality of subscribers on said list to one of a plurality of transmit power ranges;
- comparing a number of subscriber units in each of said plurality of transmit power ranges with a limit on each of said plurality of transmit power ranges until either a maximum number within one of said transmit power ranges is exceeded or all of said plurality of transmit power ranges are compared;
- determining a capacity of said communication system;
- setting said threshold transmit power margin to a first threshold if said capacity of said communication system is an under capacity and said maximum number within one of said transmit power ranges is exceeded;
- setting said threshold transmit power margin to a second threshold if said capacity of said communication system is a marginal capacity and said maximum number within one of said transmit power ranges is exceeded;
- and
- setting said threshold transmit power margin to a third threshold if said capacity of said communication system is not said under capacity or said marginal capacity and said maximum number within one of said transmit power ranges is exceeded.
6 more elements
A method for controlling transmission power in a communication system having a base site by setting a, threshold transmit power margin and a signal-to-noise level, said method comprising the steps of:
- determining a transmit power margin for each of a plurality of subscriber units in said communication system;
- determining if said transmit power margin of any of said plurality of subscriber units fails to meet said threshold transmit power margin;
- determining a capacity of said communication system;
- setting said threshold transmit power margin at said base site to a first threshold and incrementing said signal-to-noise level if said capacity of said communication system is an under capacity and said transmit power margin of at least one of said plurality of subscriber units fails to meet said threshold transmit power margin;
- setting said threshold transmit power margin at said base site to a second threshold if said capacity of said communication system is a marginal capacity;
- setting said threshold transmit power margin at said base site to a third threshold if said capacity of said communication system is not said under capacity or said marginal capacity;
- and
- decrementing said signal-to-noise level if said threshold transmit power margin is said third threshold.
5 more elements
A method for controlling transmission power in a communication system having a base site by setting a threshold signal characteristic and a signal-to-noise parameter, said method comprising the steps of:
- determining a signal characteristic for each of a plurality of subscriber units in said communication system;
- determining if said signal characteristic of any of said plurality of subscriber units is below said threshold signal characteristic;
- determining a capacity of said communication system;
- setting said threshold signal characteristic at said base site to a first threshold if said capacity of said communication system is an under capacity and adjusting said signal-to-noise parameter if at least one of said plurality of subscriber units is below said threshold signal characteristic;
- setting said threshold signal characteristic at said base site to a second threshold if said capacity of said communication system is a marginal capacity;
- and
- setting said threshold signal characteristic at said base site to a third threshold if said capacity of said communication system is not said under capacity or said marginal capacity.
4 more elements
A method for controlling transmission power in a communication system, said method comprising the steps of:
- determining a capacity of said communication system;
- establishing a threshold frame error rate based upon said capacity of said communication system;
- establishing a threshold signal-to-noise ratio for a transmission from a subscriber unit in said communication system;
- adjusting a transmission power level of said subscriber unit until said threshold signal-to-noise ratio is reached;
- determining a frame error rate of said transmission from said subscriber unit;
- decreasing said threshold signal-to-noise ratio if said frame error rate of said transmission is less than said threshold frame error rate;
- and
- increasing said threshold signal-to-noise ratio if said frame error rate of said transmission is more than said threshold frame error rate.
5 more elements
A method for controlling a threshold signal characteristic of a communication system having a base site, said method comprising the steps of:
- determining a signal characteristic for each of a plurality of subscriber units serviced by said base site;
- determining if said signal characteristic of any of said plurality of subscriber units is below said threshold signal characteristic;
- determining a capacity of said base site;
- setting said threshold signal characteristic at said base site to a first threshold if said capacity of said base site is an under capacity and incrementing a signal-to-noise threshold level if said signal characteristic of at least one of said plurality of subscriber units is below said threshold signal characteristic;
- setting said threshold signal characteristic at said base site to a second threshold if said capacity of said base site is a marginal capacity;
- and
- setting said threshold signal characteristic at said base site to a third threshold if said capacity of said base site is not said under capacity or said marginal capacity.
4 more elements
A method for controlling a threshold signal characteristic of a communication system having a base site, said method comprising the steps of:
- determining a transmit power margin for each of a plurality of subscriber units within a coverage area of said base site;
- creating a list of said plurality of subscriber units whose transmit power margin fails to meet said threshold transmit power margin;
- assigning each of said plurality of subscribers on said list to one of a plurality of transmit power ranges;
- comparing a number of subscriber units in each of said plurality of transmit power ranges with a limit on each of said plurality of transmit power ranges until either a maximum number within one of said transmit power ranges is exceeded or all of said plurality of transmit power ranges are compared;
- determining a capacity of said base site;
- setting said threshold transmit power margin to a first threshold if said capacity of said base site is an under capacity and said maximum number within one of said transmit power ranges is exceeded;
- setting said threshold transmit power margin to a second threshold if said capacity of said base site is a marginal capacity and said maximum number within one of said transmit power ranges is exceeded;
- and
- setting said threshold transmit power margin to a third threshold if said capacity of said base site is not said under capacity or said marginal capacity and said maximum number within one of said transmit power ranges is exceeded.
6 more elements
A method for controlling transmission power in a communication system having a base site, said method comprising the steps of:
- determining a capacity of said base site;
- establishing a threshold frame error rate based upon said capacity of said base site;
- establishing a threshold signal-to-noise ratio for a transmission from a subscriber unit in said base site;
- adjusting a transmission power level of said subscriber unit until said threshold signal-to-noise ratio is reached;
- determining a frame error rate of said transmission from said subscriber unit;
- decreasing said threshold signal-to-noise ratio if said frame error rate of said transmission is less than said threshold frame error rate;
- and
- increasing said threshold signal-to-noise ratio if said frame error rate of said transmission is more than said threshold frame error rate.
5 more elements
Dependencies are inferred from the claim text.