Outer loop power control for high speed data transmissions
AssigneeLucent Technologies Inc.
InventorsSubramanian Vasudevan, Lily Zhu, Jialin Zou
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Abstract
A method is provided for controlling a traffic-to-pilot ratio (TPR) in a wireless telecommunications channel. The methodology takes advantage of a preexisting feedback process used in hybrid ARQ transmission systems. Generally, information is transmitted over the communications channel, and then the acknowledgement (ACK) signal, or negative acknowledgements (NACK) signal, is used to adjust the TPR. The TPR is adjusted up substantially in response to receiving a NACK signal, and adjusted slightly down in response to receiving an ACK signal. In this manner, the TPR is rapidly adjusted up when a transmission fails, and is allowed to drift slowly down when a transmission succeeds.
Claims14
A method for controlling a traffic-to-pilot ratio for a communications channel, the method comprising:
- transmitting information over the communications channel;
- and
- adjusting the traffic-to-pilot ratio for the communications channel in response to receiving a signal indicating whether the information was successfully received.
An apparatus for controlling a traffic-to-pilot ratio for a communications channel, the apparatus comprising:
- means for transmitting information over the communications channel;
- and
- means for adjusting the traffic-to-pilot ratio for the communications channel is response to receiving a signal indicating whether the information was successfully received.
Dependencies are inferred from the claim text.