Method and apparatus for dynamically optimizing the forward-link transmit power of a broadband multi-carrier radio signal
First Claim
1. A cellular-telephone base station comprising:
- A) a base-station receiver for monitoring reverse-channel signals in a plurality of reverse radio channels respectively associated with different forward radio channels;
B) a forward-power circuit responsive to the base-station receiver for determining, for each of the forward radio channels, a forward power level as a function of the power of the reverse-channel signals that the base-station receiver monitors in the reverse radio channel associated with that forward radio channel and as a function of an average of a plurality of attenuation values of the plurality of reverse radio channels; and
C) a base-station transmitter including a common power amplifier that generates a plurality of forward-channel signals by amplifying a composite signal comprising composite-signal components whose amplification by the common amplifier results in respective ones of the plurality of forward-channel signals, said base station transmitter responsive to the forward-power circuit, for simultaneously transmitting said plurality of respective forward-channel signals in the forward radio channels at the forward power levels respectively determined therefor by the forward-power circuit.
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Accused Products
Abstract
In a cellular-communications base station (10), an attenuation circuit 22 sets different power levels for different ones of the forward communications channels by which the base station transmits to the mobile units (12) that it services. From the reverse-channel transmit power that a reverse-channel-power circuit 52 derives from the associated reverse-channel power that the base station receives, a forward power circuit (58) infers the level of forward-channel transmit power that will result in the mobile unit'"'"'s receipt of the requisite forward-channel power. In this way, the base station (10) avoids the need to transmit full power into all of the forward channels even if it is operating in accordance with a protocol that does not explicitly inform it of the forward-channel power that the mobile unit (12) is receiving.
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Citations
9 Claims
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1. A cellular-telephone base station comprising:
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A) a base-station receiver for monitoring reverse-channel signals in a plurality of reverse radio channels respectively associated with different forward radio channels; B) a forward-power circuit responsive to the base-station receiver for determining, for each of the forward radio channels, a forward power level as a function of the power of the reverse-channel signals that the base-station receiver monitors in the reverse radio channel associated with that forward radio channel and as a function of an average of a plurality of attenuation values of the plurality of reverse radio channels; and C) a base-station transmitter including a common power amplifier that generates a plurality of forward-channel signals by amplifying a composite signal comprising composite-signal components whose amplification by the common amplifier results in respective ones of the plurality of forward-channel signals, said base station transmitter responsive to the forward-power circuit, for simultaneously transmitting said plurality of respective forward-channel signals in the forward radio channels at the forward power levels respectively determined therefor by the forward-power circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A cellular-telephone communications method comprising the steps of:
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A) monitoring reverse-channel signals in a plurality of reverse radio channels respectively associated with different forward radio channels; B) determining, for each of the forward radio channels, a forward power level as a function of the power of the reverse-channel signals monitored in the reverse radio channel associated with that forward radio channel and as a function of an average of a plurality of attenuation values of the plurality of reverse radio channels; C) generating a plurality of forward-channel signals by amplifying a composite signal comprising composite-signal components whose amplification by the common amplifier results in respective ones of the plurality of forward-channel signals; and D) simultaneously transmitting said plurality of respective forward-channel signals in the forward radio channels at the forward power levels respectively determined therefor.
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Specification