Downlink Signal Separation for Low-Load Base Station Power Amplifiers
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Solution Overview
Problem
In wireless communication systems, especially in base stations, energy consumption is high due to the continuous operation of power amplifier modules for public signals like pilot and synchronization signals, making it difficult to reduce energy consumption effectively during low load conditions.
Innovation Solution
The implementation of a downlink signal processing apparatus that differentiates between public and traffic signals, allowing for separate processing and amplification, enabling the disconnection or hibernation of traffic signal transmission links during low traffic periods, thereby reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power amplifier module operates continuously to transmit public signals (pilot signal, synchronization signal, broadcast signal), then the reliability of signal transmission is improved, but the energy consumption increases and cannot be reduced during low load conditions
Solution Approach 1:
The downlink signal processing function is segmented into two independent parts: public signal processing and traffic signal processing. This is achieved by introducing a downlink signal differentiating unit that separates public downlink signals from traffic downlink signals, allowing the power amplifier to process only public signals continuously while traffic signal processing can be suspended during low load periods, thus reducing energy consumption without affecting public signal transmission reliability
Solution Approach 2:
The system dynamically adjusts the processing of traffic downlink signals based on load conditions. During low load periods, the traffic baseband processing unit can be turned off or put into hibernation state, while the public baseband processing unit continues to operate. This dynamic adjustment allows the power amplifier to maintain continuous operation for public signals while reducing overall energy consumption by suspending traffic signal processing
2Productivity
If the base station is designed according to high load standard to meet energy requirements under high load, then the productivity under high load is improved, but energy resources are wasted unnecessarily in low load state
Solution Approach 1:
The base station's downlink processing capability is segmented into public signal processing path and traffic signal processing path. This segmentation allows the system to maintain full public signal processing capability (ensuring high load readiness) while independently controlling traffic signal processing based on actual load conditions, preventing energy waste during low load periods
Solution Approach 2:
The system changes the operational parameters of the traffic baseband processing unit based on load conditions. During low load states, the processing unit can be switched off or put into low-power mode, effectively changing its energy consumption parameter from high to low, while maintaining the capability to handle traffic signals when needed, thus avoiding unnecessary energy waste
3Use of energy by moving object
If static bias voltage of power amplifier module is turned off to reduce static power consumption, then energy consumption is reduced, but the power amplifier cannot output power when needed
Solution Approach 1:
The power amplifier's function is segmented into public signal amplification and traffic signal amplification. The public signal path maintains continuous operation with bias voltage enabled, ensuring reliable power output for essential signals. The traffic signal path can have its bias voltage turned off during low load periods, reducing static power consumption while the capability to amplify traffic signals remains available when needed
Data Source
AI summary
An apparatus includes a downlink signal differentiating unit is configured to receive a downlink signal and differentiate a type of the downlink signal. A public baseband processing unit is connected to the downlink signal differentiating unit and is configured to receive a public downlink signal obtained by the downlink signal differentiating unit by the differentiating, to encode and modulate the public downlink signal to obtain a public baseband signal, and to transmit the public baseband signal to a carrier unit. A traffic baseband processing unit is connected to the downlink signal differentiating unit, and is configured to receive a traffic downlink signal obtained by the downlink signal differentiating unit by the differentiating, to encode and modulate the traffic downlink signal to obtain a traffic baseband signal, and to transmit the traffic baseband signal to the carrier unit.