Remote radio unit and method for regulating drain voltage thereof

Abstract

The invention provides a Remote Radio Unit (RRU) and a method for regulating drain voltage of the RRU, wherein the RRU comprises a feedback path, a calculation judgment unit, a power supply module and a power amplifier, wherein the feedback path is used for acquiring an output signal of the power amplifier and transmitting the output signal to the calculation judgment unit; the calculation judgment unit is used for calculating an Adjacent Channel Power Ratio (ACPR) of the output signal and raising the voltage of the power supply module according to a set stepping configuration if judging thatthe ACPR is larger than a target value and the absolute value of the difference between the ACPR and the target value is larger than a preset value, wherein if judging that the absolute value of the difference between the ACPR and the target value is smaller than or equal to the preset value, the voltage of the power supply module is not regulated; the power supply module is used for supplying power to the power amplifier according to the voltage configured by the calculation judgment unit; and the power amplifier is used for signal amplification and signal output based on the power supply ofthe power supply module. According to the proposal of the invention, energy consumption can be lowered.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a radio remote unit (RRU, Radio Remote Unit) and a method for adjusting the drain voltage of the RRU. Background technique [0002] In order to meet the requirements of energy saving, emission reduction and environmental protection, optimizing the efficiency of RRU power amplification is one of the main considerations. The RRU can adjust its drain voltage according to the load condition, which is the main energy-saving method. The RRU receives the information sent by the radio network controller (RNC, Radio Network Controller), performs power amplification through its own power amplifier, and then filters through its own filter. , and then output the information to the terminal. When the output power of the power amplifier is at the maximum power, its efficiency (PAE, Power Amplifier Efficiency) is only 30-40% at most; if the output power is reduced, the PAE value is even lower...

AI Technical Summary

Problems solved by technology

[0025] The existing solution periodically adjusts the RRU drain voltage according to the characteristics of the received information sent by the RNC. In practice, it is found that there is a large error in adjusting the RRU drain voltage based on the characteristics of the information sent by the RNC. And the characteristics of the information sent by the RNC are not the only factor to adjust the RRU drain voltage, which leads to the inability to accurately adjust the RRU drain voltage and further reduce energy consumption

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