Apparatus and method for controlling reverse TX power in a mobile terminal
First Claim
1. An apparatus for controlling reverse TX power in a mobile terminal, the apparatus comprising:
- a closed-loop power controller for limiting a TX power increase due to a power control bit of an RX signal by using a power-up limit bit and outputting a closed-loop power control value for decreasing the TX power when a TX power limit mode is selected;
an adder for calculating a TX power by adding the closed-loop power control value and an open-loop power set using a power of the RX signal; and
a maximum TX power limiter for setting a final TX power by subtracting a maximum TX power limit reference value determined according to an RX signal strength in the mobile terminal from the calculated TX power.
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Abstract
Disclosed are an apparatus and a method for controlling reverse TX power in a mobile terminal. The apparatus includes a closed-loop power controller for limiting a TX power increase due to a power control bit of an RX signal by using a power-up limit bit and outputting a closed-loop power control value for decreasing the TX power when a TX power limit mode is selected, an adder for calculating a TX power by adding the closed-loop power control value and an open-loop power set using a power of the RX signal, and a maximum TX power limiter for setting a final TX power by subtracting a maximum TX power limit reference value determined according to an RX signal strength in the mobile terminal from the calculated TX power. Accordingly, it is possible to extend a call duration while accepting a rather poor call quality.
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Citations
8 Claims
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1. An apparatus for controlling reverse TX power in a mobile terminal, the apparatus comprising:
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a closed-loop power controller for limiting a TX power increase due to a power control bit of an RX signal by using a power-up limit bit and outputting a closed-loop power control value for decreasing the TX power when a TX power limit mode is selected; an adder for calculating a TX power by adding the closed-loop power control value and an open-loop power set using a power of the RX signal; and a maximum TX power limiter for setting a final TX power by subtracting a maximum TX power limit reference value determined according to an RX signal strength in the mobile terminal from the calculated TX power. - View Dependent Claims (2, 3, 4)
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5. A method for controlling reverse TX power in a mobile terminal, comprising:
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setting a maximum TX power limit reference value according to an RX signal strength in the mobile terminal when a TX power limit mode is selected; setting a closed-loop power control value indicating power up/down according to a power control bit of the RX signal; calculating a TX power by adding the closed-loop power control value and an open-loop power set using an RX power of the RX signal; comparing the an RX signal strength of the RX signal with a predetermined RX signal strength; and determining a final TX power by subtracting the maximum TX power limit reference value from the calculated TX power when the RX signal strength of the RX signal is stronger than the predetermined RX signal strength. - View Dependent Claims (6, 7, 8)
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Specification