Apparatus and method for controlling uplink power in a mobile communication system using a TDD scheme
First Claim
1. A method for controlling uplink transmit power by an Access Terminal (AT) in a mobile communication system using a Time Division Duplexing (TDD) scheme, the method comprising the steps of:
- determining initial uplink transmit power;
transmitting uplink signals to an Access Point (AP) using the determined initial uplink transmit power;
receiving downlink signals from the AP;
measuring receive power of the received downlink signals;
detecting a power compensation value from the received downlink signals in order to compensate for the uplink transmit power, the power compensation value being determined according to whether an error has occurred in the uplink signals; and
adjusting the uplink transmit power according to the measured receive power and the detected power compensation value.
1 Assignment
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Accused Products
Abstract
An apparatus and a method for controlling uplink power utilizing an open-loop scheme in a mobile communication system using a TDD scheme. According to the apparatus and the method, an AT determines initial uplink transmit power and transmits uplink signals to an AP using the determined initial uplink transmit power, receives downlink signals from the AP, detects a power compensation value compensating for the uplink transmit power, which are determined according to whether an error has occurred in the uplink signals, measures receive power of the downlink signals, and adjusts the uplink transmit power according to the receive power and the power compensation value.
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Citations
22 Claims
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1. A method for controlling uplink transmit power by an Access Terminal (AT) in a mobile communication system using a Time Division Duplexing (TDD) scheme, the method comprising the steps of:
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determining initial uplink transmit power;
transmitting uplink signals to an Access Point (AP) using the determined initial uplink transmit power;
receiving downlink signals from the AP;
measuring receive power of the received downlink signals;
detecting a power compensation value from the received downlink signals in order to compensate for the uplink transmit power, the power compensation value being determined according to whether an error has occurred in the uplink signals; and
adjusting the uplink transmit power according to the measured receive power and the detected power compensation value. - View Dependent Claims (2, 3, 4, 5)
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6. A method for controlling uplink transmit power of an Access Terminal (AT) by an Access Point (AP) in a mobile communication system using a Time Division Duplexing (TDD) scheme, the method comprising the steps of:
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transmitting downlink signals including parameters required for determining an initial value of the uplink transmit power of an AT;
when uplink signals are received from the AT, detecting if an error has occurred in the uplink signals;
determining a power compensation value for compensating for the uplink transmit power according to whether the error has occurred in the uplink signals; and
transmitting downlink signals including the power compensation value. - View Dependent Claims (7, 8, 9, 10, 11)
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12. An apparatus for controlling uplink transmit power by an Access Terminal (AT) in a mobile communication system using a Time Division Duplexing (TDD) scheme, the apparatus comprising:
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a transmitter for transmitting uplink signals to an Access Point (AP) using initial uplink transmit power determined by a predetermined control, and transmitting uplink signals to the AP using uplink transmit power adjusted by a predetermined control;
a receiver for receiving downlink signals from the AP and detecting a power compensation value for compensating for the uplink transmit power, the power compensation value being determined according to whether an error has occurred in the uplink signals; and
a transmit power controller for determining the initial uplink transmit power, and controlling the uplink transmit power to be adjusted according to receive power and the power compensation value. - View Dependent Claims (13, 14, 15, 16)
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17. An apparatus for controlling uplink transmit power of an Access Terminal (AT) by an Access Point (AP) in a mobile communication system using a Time Division Duplexing (TDD) scheme, the apparatus comprising:
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a transmitter for transmitting downlink signals including parameters required for determining an initial value of the uplink transmit power of an AT, and transmitting downlink signals including a power compensation value for compensating for the uplink transmit power determined by a predetermined control;
a receiver for receiving uplink signals from the AT, and detecting if an error has occurred in the uplink signals; and
a power compensation value calculator for determining the power compensation value for compensating for the uplink transmit power according to whether the error has occurred in the uplink signals. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification