Device and method of continuous outer-loop power control in DTX mode for CDMA mobile communication system
AssigneeSamsung Electronics Co., Ltd.
InventorsSeung-Joo Maeng, Jae-Heung Yeom, Jae-Min Ahn, Young Ky Kim
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Abstract
A device and method for outer-loop power control in a discontinuous transmission mode in a CDMA mobile communication system. In an outer-loop power control method for a non-frame data transmission period of a dedicated control channel (DCCH) which transmits frame data discontinuously, the signal-to-noise ratio (SNR) of power control bits (PCBs) received at a mobile station from a base station is measured for the frame period, and it is determined whether the frame has errors based on the measured SNR. A closed-loop power control threshold is increased if a frame error exists and decreased if no frame errors exist.
Claims27
An outer-loop power control method for a dedicated channel which transmits frame data discontinuously, the method comprising the steps of:
- measuring the signal-to-noise ratio (SNR) of power control bits (PCBs) received at a mobile station from a base station for a non-frame data transmission period;
- determining whether a received frame has errors based on the measured SNR;
- and
- increasing a closed-loop power control threshold if a frame error exists and decreasing the threshold if no frame error exists.
An outer-loop power control method for a dedicated channel which transmits frame data discontinuously, the method comprising the steps of:
- measuring the SNR of a pilot channel signal received at a base station from a mobile station for a non-frame data transmission period;
- determining whether a received frame has errors based on the measured SNR;
- and
- increasing a closed-loop power control threshold if a frame error exists and decreasing the threshold if no frame error exists.
An outer-loop power control device for a dedicated channel which transmits frame data discontinuously, comprising:
- A an SNR measurer for measuring a SNR of PCBs received at a mobile station from a base station for a non-frame data transmission period;
- a frame error detector for determining whether the received frame has errors based on the measured SNR and outputting a frame error indicator according to the determination;
- and
- an outer-loop power controller for controlling a closed-loop power control threshold according to the frame error indicator.
An outer-loop power control device for a dedicated channel which transmits frame data discontinuously, comprising:
- an SNR measurer for measuring the SNR of a pilot channel signal received at a mobile station from a base station for a non-frame data transmission period;
- a frame error detector for determining whether the received frame has errors based on the measured SNR and outputting a frame error indicator according to the determination;
- and
- an outer-loop power controller for controlling a closed-loop power control threshold according to the frame error indicator.
An outer-loop power control method for a dedicated control channel (DCCH) which transmits frame data discontinuously, the method comprising the steps of:
- measuring the signal-to-noise ratio (SNR) of power control bits (PCBs) received at a mobile station from a base station for a non-frame data transmission period;
- determining whether a received frame has errors based on the measured SNR;
- and
- controlling a closed-loop power control threshold based upon the determination.
Dependencies are inferred from the claim text.